Fountain submersible pumps in the musical fountain in the wide range of applications
Music fountain as a high-tech water features are very popular at home and abroad, through the ever-changing IPL rendering, reflecting the theme of the Han Yun and the theme of music, and excellent music fountain will water-based ups and downs and rhythm to express movement. The use of form, sound, color to the building or the environment to add vitality. Water features for the design, return to nature's design, not only to the fact that majestic, but also people leisurely quiet. Isolated from the noise, enriched the environment, nourishing the green, to improve the artificial environment blunt
In the various types of musical fountain show landscaping and environmental protection is the main function of people like it one of the reasons. On the one hand Zhang builders of the momentum and strength, showing the local high-end and landscaping scale, or decorative embellishment function, play the role of finishing touch. While the other large-scale musical fountain show, the surrounding environment and people have played a role in environmental protection and health. Fountain can be generated by the mist of the air to reduce the humidity of the air, reduce the temperature, water fountain jet out of the impact of water droplets produce a large number of negative oxygen ions, quite good for human health, and fountain water can also be processed for recycling.
With the rapid development of science and technology, people use modern scientific and technological means, the nature of the ever-changing water, sound, light, color wonders reproduction, artificial control of the United States and the second sound of music, colorful lights, clear bright and spectacular water. They are intertwined to form a musical fountain; and transplanted into the bustling modern metropolis, to meet the needs of modern people close to nature, "It is precisely because of the musical fountain with these unique characteristics, music fountain industry, the rapid rise and development.
Throughout the history of the development of the world's fountain and music fountain past and present, only those simple craft, classic and full of vitality of the water features fountain, will be the same as the development of fashion elements evergreen. Water fountain performances, especially the artistic effect of the musical fountain, climax after another, shining light to the sky, from sound, light, electricity, water, fire the perfect combination of gorgeous glamorous visual feast. In general, the water fountain artistic effect, the need to Waterscape fountain design company's sophisticated ideas and sophisticated landscape construction practice experience, and the surrounding city buildings, landscape coordination, and strive to harmonize and reflect the combination of light and color, reflected Function and art.
2017年2月28日星期二
What safety checks should be used before the submersible pump is used?
1, Deep well submersible pump external circuit check: connect the submersible pump circuit, you should look at the power signal, and then closing. Such as water is slow and weak. Should be wired any two-phase change; if not on the water or water check, the submersible pump issued a "moo" sound and do not turn, should immediately stop checking. Check the order is: see if there is a fuse fuse fuse, poles lead to contact with bad, such as poor contact should be immediately removed to prevent the submersible pump running, burn the winding.
2, sealing inspection: mechanical seal box wear gap is too large, if not timely maintenance, water leakage caused by water leakage, breakdown winding, causing submersible pump burned. After the general work of 300h, the water sealing plug will be loosened to check. If the water or water and oil mixture is less than 25mL, the pump can still be used; if more than 25mL, should check the overall seal box grinding wear. If the grinding block damage, should have the appropriate technology and equipment manufacturers to repair. Usually can be used to inflate the pump pressure table to check the pump seal, inflatable pressure of 19.6kPa, for 10min, if the pressure gauge needle does not move, then as a good seal.
3, Insulation check: If the submersible pump itself leakage, after the water will cause the junction box between the leakage and the shell is not insulated. So should always check the submersible pump insulation resistance, generally should be more than 0.5MΩ, less than 0.5MΩ, submersible pump shall not be used.
4, the protection of the inspection: submersible pump protector trip coil burned, it lost the protection of the submersible submersible pump. The main reason for the tripping of the trip coil: First, the load is too large, such as well depth, water pipe bending, pump plug, bottom network plug, etc .; Second, the voltage is too low with submersible pumps.
2, sealing inspection: mechanical seal box wear gap is too large, if not timely maintenance, water leakage caused by water leakage, breakdown winding, causing submersible pump burned. After the general work of 300h, the water sealing plug will be loosened to check. If the water or water and oil mixture is less than 25mL, the pump can still be used; if more than 25mL, should check the overall seal box grinding wear. If the grinding block damage, should have the appropriate technology and equipment manufacturers to repair. Usually can be used to inflate the pump pressure table to check the pump seal, inflatable pressure of 19.6kPa, for 10min, if the pressure gauge needle does not move, then as a good seal.
3, Insulation check: If the submersible pump itself leakage, after the water will cause the junction box between the leakage and the shell is not insulated. So should always check the submersible pump insulation resistance, generally should be more than 0.5MΩ, less than 0.5MΩ, submersible pump shall not be used.
4, the protection of the inspection: submersible pump protector trip coil burned, it lost the protection of the submersible submersible pump. The main reason for the tripping of the trip coil: First, the load is too large, such as well depth, water pipe bending, pump plug, bottom network plug, etc .; Second, the voltage is too low with submersible pumps.
How is the deep well water pump installed?
How is the deep well water pump installed?
1, deep well water pump lifting should pay attention to protect the cable, cable to overhead, the power cord should not be too long. Do not allow the cable to force the unit when it enters the water, so as not to cause the power cord to break. The lifting device (such as tripod, hoist or electric hoist, etc.) from the weight should be greater than the weight of submersible pumps, and leave enough room. Before the lifting of the artificial rotation of the impeller, check its rotation is flexible, the main contactor contact is good, cable and cable connector with or without rupture, abrasion marks, motor shell grounding is reliable (to ensure safety, ground wire should be more than other Line grow 5mm), and check the phase line with a multimeter turn on the situation. Check the balance of the three-phase winding balance, the general measurement of the size of the submersible pump power to select the appropriate measurement block, the measurement must be noted that the red and black, respectively, two test pieces at the same time contact the detection part (ie conductor) to reduce the error and years Disturb.
2, the installation does not allow the submersible pump or put it directly placed in the sewage inlet, according to the scene to determine the minimum distance from the bottom of the submersible pump, so as not to be buried in the mud or pump inlet blocked by suspended solids, resulting in heat transfer rate Reduce the motor winding temperature rise, insulation aging, shorten the life of the stator or cause no reason to trip. Do not put the pump directly on the mud or floating sand, such as the need for temporary installation, it is recommended that the pump placed in a large floor or solid ground, so as to avoid sinking due to vibration. After installation, until the submersible pump all immersed in water, before receiving the power supply with 500V megger look at the motor three to the insulation resistance, the minimum not less than IMΩ deep well submersible pump.
1, deep well water pump lifting should pay attention to protect the cable, cable to overhead, the power cord should not be too long. Do not allow the cable to force the unit when it enters the water, so as not to cause the power cord to break. The lifting device (such as tripod, hoist or electric hoist, etc.) from the weight should be greater than the weight of submersible pumps, and leave enough room. Before the lifting of the artificial rotation of the impeller, check its rotation is flexible, the main contactor contact is good, cable and cable connector with or without rupture, abrasion marks, motor shell grounding is reliable (to ensure safety, ground wire should be more than other Line grow 5mm), and check the phase line with a multimeter turn on the situation. Check the balance of the three-phase winding balance, the general measurement of the size of the submersible pump power to select the appropriate measurement block, the measurement must be noted that the red and black, respectively, two test pieces at the same time contact the detection part (ie conductor) to reduce the error and years Disturb.
2, the installation does not allow the submersible pump or put it directly placed in the sewage inlet, according to the scene to determine the minimum distance from the bottom of the submersible pump, so as not to be buried in the mud or pump inlet blocked by suspended solids, resulting in heat transfer rate Reduce the motor winding temperature rise, insulation aging, shorten the life of the stator or cause no reason to trip. Do not put the pump directly on the mud or floating sand, such as the need for temporary installation, it is recommended that the pump placed in a large floor or solid ground, so as to avoid sinking due to vibration. After installation, until the submersible pump all immersed in water, before receiving the power supply with 500V megger look at the motor three to the insulation resistance, the minimum not less than IMΩ deep well submersible pump.
2017年2月27日星期一
What is a built-in submersible pump and an external submersible pump?
What is an external submersible pump
External submersible pump suction liquid submerged submersible pump through the impeller, directly from the outlet of the pressurized water chamber, the structure is simple, relatively high efficiency, the typical external submersible pump. In order to improve the cooling conditions of the exterior submersible pump, often the power of the submersible pump motor jacket made of jacket, the pump out of the high pressure area of the liquid introduced jacket cooling
Motor.
What is built-in submersible pumps
Built-in submersible pump inhaled by the liquid, through the impeller pressure outflow, usually cooling the oil chamber, and through the motor surrounded by the annular flow channel, so that the liquid cooling the motor and then out of the pump outlet, the pump efficiency decreased slightly, but the pump The use of reliability greatly increased for the typical built-in submersible pump. Semi-built-in submersible pump structure features between the exterior, built-in submersible pump two
, Usually pumped out of the water pipe through the part of the motor housing and chassis together, the motor to play a certain cooling effect, such as low water submersible pump. The turbine of the tubular submersible pump is located outside the submersible pump. The pump impeller is housed inside the motor rotor, and the two are integrated. As the water flowing through the rotor of the motor rotates the rotor, the motor is generally filled with water
For example, water-filled submersible pump, larger diameter, low height, good cooling conditions.
External submersible pump suction liquid submerged submersible pump through the impeller, directly from the outlet of the pressurized water chamber, the structure is simple, relatively high efficiency, the typical external submersible pump. In order to improve the cooling conditions of the exterior submersible pump, often the power of the submersible pump motor jacket made of jacket, the pump out of the high pressure area of the liquid introduced jacket cooling
Motor.
What is built-in submersible pumps
Built-in submersible pump inhaled by the liquid, through the impeller pressure outflow, usually cooling the oil chamber, and through the motor surrounded by the annular flow channel, so that the liquid cooling the motor and then out of the pump outlet, the pump efficiency decreased slightly, but the pump The use of reliability greatly increased for the typical built-in submersible pump. Semi-built-in submersible pump structure features between the exterior, built-in submersible pump two
, Usually pumped out of the water pipe through the part of the motor housing and chassis together, the motor to play a certain cooling effect, such as low water submersible pump. The turbine of the tubular submersible pump is located outside the submersible pump. The pump impeller is housed inside the motor rotor, and the two are integrated. As the water flowing through the rotor of the motor rotates the rotor, the motor is generally filled with water
For example, water-filled submersible pump, larger diameter, low height, good cooling conditions.
Shanghai Weihu Pump
is a modern enterprise with joint-stock system as product, scientific research,
development, design, production and sales. As a professional water pump manufacturer , wholesale submersible pump, choose Weihu Pump, we are committed to you Procurement
to provide professional consultancy services to ensure that you buy the right
model, the right material, cost-effective pump products, if you have other
aspects of the problem, you can call our technical experts, experts will give a
professional answer.
The characteristics of deep well submersible pump
Deep Well submersible pump has the advantages of compact structure, small size, light weight, easy installation and maintenance, safe and reliable transportation, and energy saving.
(1). Single level high head. Single stage pump shell height is short. Shortening the height of the machine to increase the stability of the operation.
(2). Pump shaft diameter is much larger than the national standard diameter. Increased safety factor for the extraction of superheated underground water sources.
(3) Casting with HT200 (ordinary castings below HT150) Super deep well pump shell with ductile iron or cast steel to improve the pump casing pressure coefficient.
(4). Check valve with a unique design. Fundamentally avoid the ultra-deep well submersible pump. Due to the pump when the return of water hammer impact force is too large caused by the valve body broken unit out of the drawbacks.
(5) The small axial force increases the service life of the motor.
(1). Single level high head. Single stage pump shell height is short. Shortening the height of the machine to increase the stability of the operation.
(2). Pump shaft diameter is much larger than the national standard diameter. Increased safety factor for the extraction of superheated underground water sources.
(3) Casting with HT200 (ordinary castings below HT150) Super deep well pump shell with ductile iron or cast steel to improve the pump casing pressure coefficient.
(4). Check valve with a unique design. Fundamentally avoid the ultra-deep well submersible pump. Due to the pump when the return of water hammer impact force is too large caused by the valve body broken unit out of the drawbacks.
(5) The small axial force increases the service life of the motor.
Overview of Axial Flow Pumps
First, the axial flow pump is mainly applicable to low-lift, high flow of occasions, such as irrigation, drainage, dock drainage, canal lock water level adjustment, or for large-scale power plant circulating pump. A high axial pump (if necessary, made of two-stage) for shallow water jet propulsion purposes.
As a rainwater, the main equipment of the submersible pumping station is QZB type submersible axial flow pump and QH (B) type submersible mixed flow pump, is the motor and axial flow pump and mixed flow pump combination of electromechanical products, is the traditional long axis Flow pump and mixed flow pump replacement products.
Main features: simple civil engineering, low project cost, easy maintenance and management, easy operation and easy automation, good work reliability, beautify the environment and develop rapidly.
Second, the submersible pump and the traditional long-axis pump in addition to the use of occasions, access to water conditions, the characteristics of the parameters are basically consistent, but also has the following significant advantages:
Pumping station total investment savings of more than 30%;
Construction period savings of more than 40%;
Unit installation time savings of more than 95%;
Unit weight reduction of more than 50%;
Saving the pumping station flood control wall investment;
Low maintenance costs;
No running noise, easy to operate, easy to automate operation;
The height of the ground building is low, the pump house can be saved, and the pumping station can be built under the ground.
Therefore, the axial flow pump and mixed flow of new and old customers in the new pumping station project can be easily replaced by submersible pumps, retro pump in the old pump project to update the submersible pump, the pump is mainly applicable to the following occasions:
Irrigation and drainage;
Municipal rainwater and mild sewage;
Industrial process water, cooling water;
Water Diversion Project.
Submersible pump nominal water diameter from 350,500,600,700,800,900,1000,1200,1400,1600 a total of ten kinds of caliber, the flow range of 0.12-12m3 / s, head range of 2-14m; power range of 7.5-630kW; Voltage class 380V, 660V, 3kV, 6kV, 10kV.
Third, the structure that
QZB submersible axial flow pump and QH (B) type submersible pump, pump section from the water bell, impeller parts, impeller shell and guide vane four parts.
The submersible motor is a fully sealed dry asynchronous motor, the cabinet will be closed, the motor at the top of the cable outlet at the static seal device, the motor under the cover of the shaft at the shaft of the sealing device, submersible motor with all the safe and reliable performance of diving. The seal leakage, coil and bearing temperature are monitored, alarm and protection devices, does not affect the normal operation of the motor early leakage (only alarm). When the coil temperature exceeds 135 ℃, the bearing temperature exceeds 90 ℃, the use of power protection, all protector by a submersible pump dedicated protector to monitor, to ensure the safe use of submersible pumps.
The sensor output signal is received by the submersible pump protector. The protector for each output signal, including the switch or analog output, respectively, a switch signal, and the protector shows the alarm flash signal.
As a rainwater, the main equipment of the submersible pumping station is QZB type submersible axial flow pump and QH (B) type submersible mixed flow pump, is the motor and axial flow pump and mixed flow pump combination of electromechanical products, is the traditional long axis Flow pump and mixed flow pump replacement products.
Main features: simple civil engineering, low project cost, easy maintenance and management, easy operation and easy automation, good work reliability, beautify the environment and develop rapidly.
Second, the submersible pump and the traditional long-axis pump in addition to the use of occasions, access to water conditions, the characteristics of the parameters are basically consistent, but also has the following significant advantages:
Pumping station total investment savings of more than 30%;
Construction period savings of more than 40%;
Unit installation time savings of more than 95%;
Unit weight reduction of more than 50%;
Saving the pumping station flood control wall investment;
Low maintenance costs;
No running noise, easy to operate, easy to automate operation;
The height of the ground building is low, the pump house can be saved, and the pumping station can be built under the ground.
Therefore, the axial flow pump and mixed flow of new and old customers in the new pumping station project can be easily replaced by submersible pumps, retro pump in the old pump project to update the submersible pump, the pump is mainly applicable to the following occasions:
Irrigation and drainage;
Municipal rainwater and mild sewage;
Industrial process water, cooling water;
Water Diversion Project.
Submersible pump nominal water diameter from 350,500,600,700,800,900,1000,1200,1400,1600 a total of ten kinds of caliber, the flow range of 0.12-12m3 / s, head range of 2-14m; power range of 7.5-630kW; Voltage class 380V, 660V, 3kV, 6kV, 10kV.
Third, the structure that
QZB submersible axial flow pump and QH (B) type submersible pump, pump section from the water bell, impeller parts, impeller shell and guide vane four parts.
The submersible motor is a fully sealed dry asynchronous motor, the cabinet will be closed, the motor at the top of the cable outlet at the static seal device, the motor under the cover of the shaft at the shaft of the sealing device, submersible motor with all the safe and reliable performance of diving. The seal leakage, coil and bearing temperature are monitored, alarm and protection devices, does not affect the normal operation of the motor early leakage (only alarm). When the coil temperature exceeds 135 ℃, the bearing temperature exceeds 90 ℃, the use of power protection, all protector by a submersible pump dedicated protector to monitor, to ensure the safe use of submersible pumps.
The sensor output signal is received by the submersible pump protector. The protector for each output signal, including the switch or analog output, respectively, a switch signal, and the protector shows the alarm flash signal.
Large flow of energy - saving submersible pumps
Large flow of energy - saving submersible pumps
1, the series of submersible pumps, belonging to a submersible motor for the double-suction pump clever combination, it not only has the function of submersible pump, but also has a double suction pump to run a smooth special performance.
2, high lift submersible pumps can meet the requirements of the use of higher head occasions, because the mechanical seal in a negative pressure state of operation, with a higher stability.
3, the use of double suction structure of low water absorption, due to the use of double-suction double-channel single volute structure, the motor without axial tension, reduce and balance the radial force, greatly improving the pump life of 3 times, Use efficiency of 15%.
4, the configuration of the external circulation water pump, you can work in the low water level for a long time.Configuration of the self-mixing impeller pump, with self-mixing function can stir the pool of water, so that sewage mixed with the pump discharge.
5, the use of large channel anti-blocking components designed to greatly improve the dirt through the ability to effectively through the shorter fiber material and less solid particles.
6, mechanical seal with double-channel series seal, the material for the hard corrosion-resistant tungsten carbide, with durable, wear-resistant characteristics, can make the pump safe operation more than 20,000 hours.
7, pump oil room with oil and water probe, when the pump side of the mechanical seal damage, the water into the oil room, the probe signal, the implementation of the protection of the pump.
8, dual-rail automatic coupling safety system, to the pump installation, maintenance has brought great convenience, people do not have to enter and exit the sewage pit.
9, float switch according to the required water level changes, automatic control of the pump stop, no special care.
10, according to the use of the motor can be used outside the cooling system, to ensure that the pump in the anhydrous (dry) state of safe operation.
11, the installation of a fixed automatic coupling installation and mobile installation of two, to meet the different use of the occasion.
1, the series of submersible pumps, belonging to a submersible motor for the double-suction pump clever combination, it not only has the function of submersible pump, but also has a double suction pump to run a smooth special performance.
2, high lift submersible pumps can meet the requirements of the use of higher head occasions, because the mechanical seal in a negative pressure state of operation, with a higher stability.
3, the use of double suction structure of low water absorption, due to the use of double-suction double-channel single volute structure, the motor without axial tension, reduce and balance the radial force, greatly improving the pump life of 3 times, Use efficiency of 15%.
4, the configuration of the external circulation water pump, you can work in the low water level for a long time.Configuration of the self-mixing impeller pump, with self-mixing function can stir the pool of water, so that sewage mixed with the pump discharge.
5, the use of large channel anti-blocking components designed to greatly improve the dirt through the ability to effectively through the shorter fiber material and less solid particles.
6, mechanical seal with double-channel series seal, the material for the hard corrosion-resistant tungsten carbide, with durable, wear-resistant characteristics, can make the pump safe operation more than 20,000 hours.
7, pump oil room with oil and water probe, when the pump side of the mechanical seal damage, the water into the oil room, the probe signal, the implementation of the protection of the pump.
8, dual-rail automatic coupling safety system, to the pump installation, maintenance has brought great convenience, people do not have to enter and exit the sewage pit.
9, float switch according to the required water level changes, automatic control of the pump stop, no special care.
10, according to the use of the motor can be used outside the cooling system, to ensure that the pump in the anhydrous (dry) state of safe operation.
11, the installation of a fixed automatic coupling installation and mobile installation of two, to meet the different use of the occasion.
Performance advantages of axial flow pump
Vertical axial flow pump is mainly by the lift of the fluid will lead to the export of the fluid, is the axial into the axial out, with the advantages of large flow.
1, submersible axial flow pump: drive the pump motor is dry all-enclosed diving three-phase asynchronous motor, can be immersed in water for a long time to run, with a series of traditional aircraft unparalleled advantages.
2, because the motor and the pump constitute a whole, no need to install the site for consumptive, time-consuming motor, transmission, pump axis alignment process, on-site installation is convenient and fast.
3, due to sneak into the water to run, can greatly simplify the pumping station of civil engineering and construction works to reduce the installation area, saving the project cost 30 to 40%.
4, low noise, the pump station without high temperature, improve the operating environment, according to the requirements of the whole underground pump station, to maintain the ground environment.
5, submersible motor with double or triple mechanical seal, F level (temperature 155.C) insulation, protection class IP68 (IEC). In the hydraulic model, we absorb the advantages of similar products at home and abroad, using the most advanced variable ring, variable speed surface lift method, the independent design of energy efficient, good anti-cavitation performance of the new hydroelectric power generation model. High reliability, and with the traditional pump with interchangeability, user-friendly selection, use.
6, easy to operate, easy to achieve remote control and automatic control.
The use of this type of submersible pump is to solve the water level ups and downs along the river, lake area pumping station to flood the most thorough way, and save the pump between the long axis and the middle bearing, so that the unit is running more reliable.
1, submersible axial flow pump: drive the pump motor is dry all-enclosed diving three-phase asynchronous motor, can be immersed in water for a long time to run, with a series of traditional aircraft unparalleled advantages.
2, because the motor and the pump constitute a whole, no need to install the site for consumptive, time-consuming motor, transmission, pump axis alignment process, on-site installation is convenient and fast.
3, due to sneak into the water to run, can greatly simplify the pumping station of civil engineering and construction works to reduce the installation area, saving the project cost 30 to 40%.
4, low noise, the pump station without high temperature, improve the operating environment, according to the requirements of the whole underground pump station, to maintain the ground environment.
5, submersible motor with double or triple mechanical seal, F level (temperature 155.C) insulation, protection class IP68 (IEC). In the hydraulic model, we absorb the advantages of similar products at home and abroad, using the most advanced variable ring, variable speed surface lift method, the independent design of energy efficient, good anti-cavitation performance of the new hydroelectric power generation model. High reliability, and with the traditional pump with interchangeability, user-friendly selection, use.
6, easy to operate, easy to achieve remote control and automatic control.
The use of this type of submersible pump is to solve the water level ups and downs along the river, lake area pumping station to flood the most thorough way, and save the pump between the long axis and the middle bearing, so that the unit is running more reliable.
Development trend of submersible pump industry
As the submersible pump itself and the use of submersible pump pump station has many advantages, therefore, the future of China's demand will continue to grow, and the following main trends.
1. Development of large and medium-sized submersible pumps Large and medium-sized submersible pumps with simplified pump structure and saving pump station construction investment outstanding advantages, generally reduce the cost of 40% to 60%, shortening the duration of 1/2 ~ 2/3. Therefore, it will be in the municipal, industrial and mining, environmental protection and industrial and agricultural drainage and other aspects of more and more widely used. Expected future demand will be larger.
2. Development of multi-purpose multi-purpose submersible pump China's submersible pump in the form of foreign famous submersible pump production plant compared to the product is not enough, such as with a cutting device pump, multi-stage pump, pumping corrosive media Submersible pumps and other production is still very small, but its market demand is very large, therefore, has a very good development prospects.
3. Development of high reliability mechanical seal Mechanical seal is a key part of the submersible pump, the use of two single-end mechanical seal, so that the pressure of the medium can be applied to the end, the leakage direction for the flow, these are favorable, but the structure Slightly complicated In the oil chamber with double-ended mechanical seal, both sides of the end surface should be used in different structural types, so that the medium's pressure can be applied to the lower side of the face, or rely on spring force, sealing the end of the anti-thrust easy to open the end. Therefore, further research should be carried out on the structure and materials to improve its reliability and longevity.
4. New materials, new technology and other new technology will gradually use ordinary pump has been used stainless steel, fluorine plastic (F46), lined with plastic, rubber, ceramic, etc., all of these materials should be applied to the submersible pump as soon as possible to expand the submersible pump Application areas. And computer-aided design, auxiliary manufacturing and auxiliary testing and other new technologies, new technology applications are imperative. Facts have proved that new technology, new materials, new technology applications, not only the liberation of labor productivity, but also to ensure product quality is stable and reliable.
5. Attention to the appearance of submersible pump quality and gradually enter the international market China's submersible pump in the international market has a clear price competitive advantage, but must pay attention to improve the reliability and life of the pump, in particular, to improve the submersible pump The appearance of quality, give users a sense of beauty, so that domestic diving pump as soon as possible into the international market.
1. Development of large and medium-sized submersible pumps Large and medium-sized submersible pumps with simplified pump structure and saving pump station construction investment outstanding advantages, generally reduce the cost of 40% to 60%, shortening the duration of 1/2 ~ 2/3. Therefore, it will be in the municipal, industrial and mining, environmental protection and industrial and agricultural drainage and other aspects of more and more widely used. Expected future demand will be larger.
2. Development of multi-purpose multi-purpose submersible pump China's submersible pump in the form of foreign famous submersible pump production plant compared to the product is not enough, such as with a cutting device pump, multi-stage pump, pumping corrosive media Submersible pumps and other production is still very small, but its market demand is very large, therefore, has a very good development prospects.
3. Development of high reliability mechanical seal Mechanical seal is a key part of the submersible pump, the use of two single-end mechanical seal, so that the pressure of the medium can be applied to the end, the leakage direction for the flow, these are favorable, but the structure Slightly complicated In the oil chamber with double-ended mechanical seal, both sides of the end surface should be used in different structural types, so that the medium's pressure can be applied to the lower side of the face, or rely on spring force, sealing the end of the anti-thrust easy to open the end. Therefore, further research should be carried out on the structure and materials to improve its reliability and longevity.
4. New materials, new technology and other new technology will gradually use ordinary pump has been used stainless steel, fluorine plastic (F46), lined with plastic, rubber, ceramic, etc., all of these materials should be applied to the submersible pump as soon as possible to expand the submersible pump Application areas. And computer-aided design, auxiliary manufacturing and auxiliary testing and other new technologies, new technology applications are imperative. Facts have proved that new technology, new materials, new technology applications, not only the liberation of labor productivity, but also to ensure product quality is stable and reliable.
5. Attention to the appearance of submersible pump quality and gradually enter the international market China's submersible pump in the international market has a clear price competitive advantage, but must pay attention to improve the reliability and life of the pump, in particular, to improve the submersible pump The appearance of quality, give users a sense of beauty, so that domestic diving pump as soon as possible into the international market.
Shanghai Weihu Pump
is a modern enterprise with joint-stock system as product, scientific research,
development, design, production and sales. As a professional water pump manufacturer , wholesale submersible pump, choose Weihu Pump, we are committed to you Procurement
to provide professional consultancy services to ensure that you buy the right
model, the right material, cost-effective pump products, if you have other
aspects of the problem, you can call our technical experts, experts will give a
professional answer.
Axial flow pump packing seal precautions
Axial flow pump packing seal precautions
1 filler should be soft and soft texture, the material should be based on the working medium and operating parameters of the correct choice.
2 filler interface should be tight, both ends of the termination angle should be consistent, generally 45º angle, the installation of two adjacent packing interface should be staggered 120º-180º angle.
3 liquid seal ring and the diameter of the sleeve gap is generally 1.00-1.50mm.
4 liquid seal ring and packing box diameter gap is generally 0.15-0.20mm.
5 filler gland and the diameter of the sleeve is generally 0.75-1.00mm gap, the gap should be uniform.
6 filler gland and packing box diameter gap is generally 0.10-0.30mm.
7 with packing bottom ring, the bottom ring and the diameter of the sleeve gap is generally 0.70-1.00mm.
8 packing press, the liquid seal ring into the liquid hole should be aligned with the liquid seal or liquid seal ring slightly to the outside, water sealing channel should be smooth.
9 hand wheel, the rotor should be flexible rotation; soil tightness should be appropriate, the process should be water droplets out.
1 filler should be soft and soft texture, the material should be based on the working medium and operating parameters of the correct choice.
2 filler interface should be tight, both ends of the termination angle should be consistent, generally 45º angle, the installation of two adjacent packing interface should be staggered 120º-180º angle.
3 liquid seal ring and the diameter of the sleeve gap is generally 1.00-1.50mm.
4 liquid seal ring and packing box diameter gap is generally 0.15-0.20mm.
5 filler gland and the diameter of the sleeve is generally 0.75-1.00mm gap, the gap should be uniform.
6 filler gland and packing box diameter gap is generally 0.10-0.30mm.
7 with packing bottom ring, the bottom ring and the diameter of the sleeve gap is generally 0.70-1.00mm.
8 packing press, the liquid seal ring into the liquid hole should be aligned with the liquid seal or liquid seal ring slightly to the outside, water sealing channel should be smooth.
9 hand wheel, the rotor should be flexible rotation; soil tightness should be appropriate, the process should be water droplets out.
Axial flow pump preparation before commissioning
Axial flow pump preparation before commissioning
1 to confirm the axial flow pump unit overhaul or installation is completed, the quality of Shanghai Weihu pump installation procedures in line with the requirements of a complete record, accurate, finished material net, clean the site.
2 instrument control system is complete and accurate.
3 electrical system, ground connection is connected, turn right.
4 Lubrication system to join the qualified lubricant (Jinan TEDA pump recommended you use high-quality lithium-based lubricant), lubrication conditions meet the requirements.
5 cooling water flow, exhaust, sewage is completed.
6 pool filled with water to the specified level.
7 packing tightly appropriate, to the stuffing box continuous injection of water or soapy water lubrication rubber bearings, axial pump to run properly, fill the water to stop filling water.
8 car inspection, flexible rotation, no abnormal phenomenon.
1 to confirm the axial flow pump unit overhaul or installation is completed, the quality of Shanghai Weihu pump installation procedures in line with the requirements of a complete record, accurate, finished material net, clean the site.
2 instrument control system is complete and accurate.
3 electrical system, ground connection is connected, turn right.
4 Lubrication system to join the qualified lubricant (Jinan TEDA pump recommended you use high-quality lithium-based lubricant), lubrication conditions meet the requirements.
5 cooling water flow, exhaust, sewage is completed.
6 pool filled with water to the specified level.
7 packing tightly appropriate, to the stuffing box continuous injection of water or soapy water lubrication rubber bearings, axial pump to run properly, fill the water to stop filling water.
8 car inspection, flexible rotation, no abnormal phenomenon.
Axial flow pump test when the test items
Axial flow pump test when the test items
1 no abnormal noise, the fasteners without loosening.
2 rolling bearing temperature does not exceed 40 ℃, the maximum temperature is generally not more than 75 ℃, sliding bearing temperature should not exceed 35 ℃, the maximum temperature is generally not more than 65 ℃.
3 parts of the temperature and the system pressure and other parameters within the specified range.
4 The vibration value complies with the requirements of ZBJ71009, see Appendix F.
5 voltage, current and motor temperature rise does not exceed the provisions.
6 pressure is stable, the flow reaches the nameplate output or determine the ability;
7 test run time is 2-4 hours.
1 no abnormal noise, the fasteners without loosening.
2 rolling bearing temperature does not exceed 40 ℃, the maximum temperature is generally not more than 75 ℃, sliding bearing temperature should not exceed 35 ℃, the maximum temperature is generally not more than 65 ℃.
3 parts of the temperature and the system pressure and other parameters within the specified range.
4 The vibration value complies with the requirements of ZBJ71009, see Appendix F.
5 voltage, current and motor temperature rise does not exceed the provisions.
6 pressure is stable, the flow reaches the nameplate output or determine the ability;
7 test run time is 2-4 hours.
2017年2月26日星期日
Performance and Characteristics of Vertical Axial Flow Pump
Vertical axial flow pump with large flow, low head, high than the number of revolutions, high efficiency, small footprint, performance parameter variability, and suitable for low water conditions and other characteristics.
1, the product from the pump part and the transmission part of the two parts. Transmission part of the vertical motor as the driving force, vertical motor installed in the transmission device, the transmission device set the ball bearing thrust bearings to grease or oil lubrication. The larger power bearing has a water-cooled sandwich. It is necessary to use external cooling water.
2, the pump structure is conventional for the layered, special structure of the organic pump connection, open type, core pulling type, fully adjustable.
3, from the coupling down to see, the pump clockwise rotation.
4, the pump guide bearing for the import of Cypriot bearings, water can be used to self-lubricating or additional water lubrication.
1, the product from the pump part and the transmission part of the two parts. Transmission part of the vertical motor as the driving force, vertical motor installed in the transmission device, the transmission device set the ball bearing thrust bearings to grease or oil lubrication. The larger power bearing has a water-cooled sandwich. It is necessary to use external cooling water.
2, the pump structure is conventional for the layered, special structure of the organic pump connection, open type, core pulling type, fully adjustable.
3, from the coupling down to see, the pump clockwise rotation.
4, the pump guide bearing for the import of Cypriot bearings, water can be used to self-lubricating or additional water lubrication.
Influence of Impeller Accuracy on Axial flow Pump Efficiency
Impeller processing accuracy is not good enough? This affects not only the performance of the axial flow pump, but also affect your work, so choose the best to smooth work.
Impeller is an important part of water machinery and other hydraulic machinery, impeller machining accuracy directly affect the efficiency of the pump and the stability of the run-time. For the axial flow pump and the guide vane mixed flow pump, in order to facilitate the adjustment of the blade installation angle to meet the different requirements, usually the outer edge of the impeller designed to spherical. As the impeller outer spherical and spherical spherical surface of the gap on the hydraulic efficiency of a greater impact, so the impeller outer spherical processing technology is particularly important. General shaft, mixed flow pump impeller larger diameter, and most of the mixed-flow pump impeller, the blade centerline and impeller rotation axis tilt a certain angle, because the pump and the specific speed, the blade center line and impeller rotation axis tilt The angle is also different, such as most axial pump impeller, the blade centerline and impeller rotation axis tilt angle of 90 °.
Impeller is an important part of water machinery and other hydraulic machinery, impeller machining accuracy directly affect the efficiency of the pump and the stability of the run-time. For the axial flow pump and the guide vane mixed flow pump, in order to facilitate the adjustment of the blade installation angle to meet the different requirements, usually the outer edge of the impeller designed to spherical. As the impeller outer spherical and spherical spherical surface of the gap on the hydraulic efficiency of a greater impact, so the impeller outer spherical processing technology is particularly important. General shaft, mixed flow pump impeller larger diameter, and most of the mixed-flow pump impeller, the blade centerline and impeller rotation axis tilt a certain angle, because the pump and the specific speed, the blade center line and impeller rotation axis tilt The angle is also different, such as most axial pump impeller, the blade centerline and impeller rotation axis tilt angle of 90 °.
Common Faults and Solutions for Daily Use of Axial Flow Pumps
Today to share with you in the daily use of some large and small faults, and now introduce axial Flow Pump common faults and solutions:
Supporting power motor overheating
One: is the power of the reasons: the voltage is high or low will cause the motor overheating; power three-phase voltage asymmetry will lead winding overheating; lack of operation, agricultural motor burned more than 85% is due to lack of operation caused by the response The motor is equipped with a phase loss protection device.
Two: the pump is the reason, the choice of power is not matched, start too frequent, fixed for short or intermittent work system of continuous operation of the motor. Should limit the number of starts, the correct use of thermal protection, according to the motor calibration of the fixed use.
Three: the cause of the motor itself;
Four: the working environment reasons; motor windings damp or dust, oil and other attached to the winding, resulting in lower insulation.
Preparation of single base axial flow pump before installation
Preparation of single base axial flow pump before installation.
(1) Check the pump body, transmission and motor should be no damage, pump shaft and drive shaft if bending, must be straightened.
(2) tools and lifting machinery should be complete.
(3) See installation dimensions drawing, check the pump foundation and the inlet pipe to meet the installation requirements.
(4) The following points must be observed due to the construction of the intake pond and the arrangement of several pumps in the same inlet basin.
① impeller should have enough submerged depth.
② pump the bell and the bottom of the pool, to maintain the required distance.
③ water flow even without vortex into the pump.
④ a few pumps in the same pool operation, should not produce in the disturbance.
⑤ into the pool before the need to have a trash rack, over the trumpet flow rate of not more than 0.3 m / s is appropriate.
(1) Check the pump body, transmission and motor should be no damage, pump shaft and drive shaft if bending, must be straightened.
(2) tools and lifting machinery should be complete.
(3) See installation dimensions drawing, check the pump foundation and the inlet pipe to meet the installation requirements.
(4) The following points must be observed due to the construction of the intake pond and the arrangement of several pumps in the same inlet basin.
① impeller should have enough submerged depth.
② pump the bell and the bottom of the pool, to maintain the required distance.
③ water flow even without vortex into the pump.
④ a few pumps in the same pool operation, should not produce in the disturbance.
⑤ into the pool before the need to have a trash rack, over the trumpet flow rate of not more than 0.3 m / s is appropriate.
Stability of Drainage axial flow pump
Drainage Axial flow pump running stability, is the general pump can not be compared.
⑴ single-stage high, single-stage pump shell height is short, shortening the height of the machine to increase the stability of the operation.
⑵ pump shaft diameter is much larger than the national standard diameter, for the extraction of super deep underground groundwater source to increase the safety factor.
⑶ castings using HT200 super deep well pump shell with ductile iron or cast steel to improve the pump casing pressure coefficient.
⑷ check valve with a unique design, from the fundamental to avoid the super deep well submersible pump due to stop the pump when the impact of water hammer is too large caused by the body of the broken body defects.
⑸ small axial force, an increase of the motor life, improve the efficiency of the unit.
⑴ single-stage high, single-stage pump shell height is short, shortening the height of the machine to increase the stability of the operation.
⑵ pump shaft diameter is much larger than the national standard diameter, for the extraction of super deep underground groundwater source to increase the safety factor.
⑶ castings using HT200 super deep well pump shell with ductile iron or cast steel to improve the pump casing pressure coefficient.
⑷ check valve with a unique design, from the fundamental to avoid the super deep well submersible pump due to stop the pump when the impact of water hammer is too large caused by the body of the broken body defects.
⑸ small axial force, an increase of the motor life, improve the efficiency of the unit.
Anti - corrosion Technology of Chemical Axial Flow Pump
Application of Chemical Axial Pump Pump Shaft Thermal Spraying Stainless Steel Anti-corrosion Technology
The use of anti-corrosion coating coating current protection technology, the chemical axial pump, submerged pump pump shell anti-corrosion effect is ideal, but the chemical axial flow pump, submerged pump pump shaft as a whole is rusty, accompanied by large area erosion, impeller and shaft Of the joint parts of the Hafu lock is particularly serious corrosion, the entire spindle head shoulder was peeling off, if the operation of a period of time the impeller may fall off lead to accidents.
Design requirements of chemical axial pump, submersible pump work, the shaft casing filled with fresh water, but the actual operation, fresh water, shaft casing is often seawater intrusion, the pump shaft in the sea water medium, the pump shaft will be serious Seawater corrosion and galvanic corrosion. As the shaft casing of the electrical shielding effect, making the external current cathodic protection system protection current can not reach the pump shaft, the pump shaft can not play a protective role.
To protect the chemical axial pump, submerged pump shaft, the chemical axial pump, submerged pump shaft using a thermal spray stainless steel coating with closed technology. The process is: a sand blasting rust → fresh water rinse → secondary blasting rust → thermal spray stainless steel 1Cr18Ni9Ti → coating closed; require spraying thickness of 250 μm or so. After the implementation of the process 3 years, check the chemical axial pump, submerged pump pump shaft surface is basically intact, in addition to Hafu lock ring under the spindle corrosion, the pump shaft corrosion has been effectively controlled.
The use of anti-corrosion coating coating current protection technology, the chemical axial pump, submerged pump pump shell anti-corrosion effect is ideal, but the chemical axial flow pump, submerged pump pump shaft as a whole is rusty, accompanied by large area erosion, impeller and shaft Of the joint parts of the Hafu lock is particularly serious corrosion, the entire spindle head shoulder was peeling off, if the operation of a period of time the impeller may fall off lead to accidents.
Design requirements of chemical axial pump, submersible pump work, the shaft casing filled with fresh water, but the actual operation, fresh water, shaft casing is often seawater intrusion, the pump shaft in the sea water medium, the pump shaft will be serious Seawater corrosion and galvanic corrosion. As the shaft casing of the electrical shielding effect, making the external current cathodic protection system protection current can not reach the pump shaft, the pump shaft can not play a protective role.
To protect the chemical axial pump, submerged pump shaft, the chemical axial pump, submerged pump shaft using a thermal spray stainless steel coating with closed technology. The process is: a sand blasting rust → fresh water rinse → secondary blasting rust → thermal spray stainless steel 1Cr18Ni9Ti → coating closed; require spraying thickness of 250 μm or so. After the implementation of the process 3 years, check the chemical axial pump, submerged pump pump shaft surface is basically intact, in addition to Hafu lock ring under the spindle corrosion, the pump shaft corrosion has been effectively controlled.
Technical Requirements for Sliding Bearing of Axial Flow Pump
Technical Requirements for Sliding Bearing of Axial Flow Pump
1, the basic requirements
It is necessary to make the journal and sliding bearings evenly and in fine contact, but also have a certain gap.
2, contact angle
Refers to the journal and the sliding bearing contact with the center of the center of the angle.
Contact angle can not be too big nor too small. The contact angle is too small will increase the sliding bearing pressure, serious will make the sliding bearing a greater deformation, accelerated wear and shorten the service life; contact angle is too large, will affect the formation of oil film, not a good liquid lubrication.
The experimental study shows that the limit of the contact angle of the sliding bearing is 120 °. When the sliding bearing wears into this contact angle, the liquid lubrication is destroyed. So no longer affect the sliding bearing under pressure conditions, the contact angle is smaller as possible.
From the theoretical analysis of the friction force, when the contact angle is 60 °, the friction torque is the smallest, so it is suggested that the sliding bearing with speed higher than 500r / min has a contact angle of 60 ° and a speed of less than 500r / min, The contact angle can be 90 ° or 60 °
3, contact points
The actual contact of the journal with the surface of the sliding bearing can be expressed by the actual number of contacts per unit area. The more contact points, the more detailed, the more uniform, said the sliding bearing scraping the better, on the contrary, it means that the sliding bearing scraping research is not good.
Generally speaking, the more fine the contact point, the greater the difficulty of scraping. Production should be based on the performance of sliding bearings and working conditions to determine the contact point, the following table of information available for reference:
Sliding bearing speed (r / min)
Contact point (number of contacts per 25 x 25 mm area)
100 or less
3 ~ 5
100 ~ 500
10 ~ 15
500 to 1000
15 ~ 20
1000 to 2000
20 to 25
2000 or more
25 or more
Ⅰ and Ⅱ grade precision machinery can use the above table data, Ⅲ grade precision of the machine can be halved by the above table data.
Axial flow pump packing seal mechanism
Axial flow pump packing seal mechanism
When the packing is loaded into the packing chamber, it is axially compressed by the gland. When the shaft and the packing have relative movement, the radial force is generated by the plasticity of the packing and is in close contact with the shaft. At the same time, the impregnated lubricant in the filler is extruded to form an oil film between the contact surfaces. As the contact state is not particularly uniform, the contact area will be "border lubrication" state, known as the "bearing effect"; and not contact the concave to form a small oil tank, a thick oil film, contact parts and non-contact parts together Rules of the maze, from the role of preventing leakage of liquid flow, which is called "maze effect". This is the mechanism of packing. Obviously, a good seal is to maintain the "bearing effect" and "maze effect". That is to say, to maintain good lubrication and proper compression. If the lubrication is bad, or pressure too tight will make the oil film interruption, resulting in dry friction between the filler and the shaft, and finally lead to burning shaft and serious wear and tear.
When the packing is loaded into the packing chamber, it is axially compressed by the gland. When the shaft and the packing have relative movement, the radial force is generated by the plasticity of the packing and is in close contact with the shaft. At the same time, the impregnated lubricant in the filler is extruded to form an oil film between the contact surfaces. As the contact state is not particularly uniform, the contact area will be "border lubrication" state, known as the "bearing effect"; and not contact the concave to form a small oil tank, a thick oil film, contact parts and non-contact parts together Rules of the maze, from the role of preventing leakage of liquid flow, which is called "maze effect". This is the mechanism of packing. Obviously, a good seal is to maintain the "bearing effect" and "maze effect". That is to say, to maintain good lubrication and proper compression. If the lubrication is bad, or pressure too tight will make the oil film interruption, resulting in dry friction between the filler and the shaft, and finally lead to burning shaft and serious wear and tear.
Technical Requirements for Installation of Axial Pump Packing Seals
Axial flow pump packing seal (packing) when installed technical requirements. Installation of packing seals - packing shall be in accordance with the technical documentation. If it is not expressly provided, it shall meet the following requirements:
1, check the axial flow pump pump shaft at the sealing part of the radial runout, the axis of the allowable radial runout in the range of 0.03 ~ 0.08mm;
2, liquid seal ring and the diameter of the sleeve gap is generally 1.00 ~ 1.50mm, liquid seal ring and packing box diameter gap is generally 0.15 ~ 0.20mm;
3, packing gland and the diameter of the sleeve gap is generally 0.75 ~ 1.00mm, the gap should be uniform;
4, packing gland and packing box diameter gap is generally 0.10 ~ 0.30mm;
5, with the bottom of the filler, the bottom ring and the diameter of the sleeve gap is generally 0.70 ~ 1.00mm;
6, packing pressure, the liquid seal into the liquid hole should be aligned with the liquid seal, or liquid seal ring slightly to the outside;
7, for the packing of the packing, with a shaft with the same size of the first stick, the filler wrapped around it, and then cut off the knife, the incision is best to be 45 ° slope.
1, check the axial flow pump pump shaft at the sealing part of the radial runout, the axis of the allowable radial runout in the range of 0.03 ~ 0.08mm;
2, liquid seal ring and the diameter of the sleeve gap is generally 1.00 ~ 1.50mm, liquid seal ring and packing box diameter gap is generally 0.15 ~ 0.20mm;
3, packing gland and the diameter of the sleeve gap is generally 0.75 ~ 1.00mm, the gap should be uniform;
4, packing gland and packing box diameter gap is generally 0.10 ~ 0.30mm;
5, with the bottom of the filler, the bottom ring and the diameter of the sleeve gap is generally 0.70 ~ 1.00mm;
6, packing pressure, the liquid seal into the liquid hole should be aligned with the liquid seal, or liquid seal ring slightly to the outside;
7, for the packing of the packing, with a shaft with the same size of the first stick, the filler wrapped around it, and then cut off the knife, the incision is best to be 45 ° slope.
2017年2月24日星期五
Axial flow pump rubber bearings how to replace
ZLB-type small and medium-sized axial flow pump generally have two rubber bearings, the replacement of all the replacement, if the pump impeller center line to the bottom of the distance is greater than the pump shaft length is simple,
1, remove the speaker.
2, remove the impeller nut (moving head) to remove the impeller.
3, open the next rubber bearing, pay attention to remove the bolt, you can use the top wire out of the next rubber bearings.
4, release the packing seal gland.
5, release the rigid coupling. Pay attention to the pump shaft and so suddenly drop off to prevent injury.
6, with a tool to remove the next pump shaft coupling nut, remove the pump section,
7, remove the packing gland, packing box, rubber bearing.
8, clean up the combination of surface, for new rubber bearings. Such as impeller parts can not continue to use the best simultaneous replacement.
9, the first impeller in the order on the pump shaft, you must tighten the nut.
10, assembled in reverse order.
11, from the packing gland above the gap at the manual water or with the lubrication of water, manual car.
1, remove the speaker.
2, remove the impeller nut (moving head) to remove the impeller.
3, open the next rubber bearing, pay attention to remove the bolt, you can use the top wire out of the next rubber bearings.
4, release the packing seal gland.
5, release the rigid coupling. Pay attention to the pump shaft and so suddenly drop off to prevent injury.
6, with a tool to remove the next pump shaft coupling nut, remove the pump section,
7, remove the packing gland, packing box, rubber bearing.
8, clean up the combination of surface, for new rubber bearings. Such as impeller parts can not continue to use the best simultaneous replacement.
9, the first impeller in the order on the pump shaft, you must tighten the nut.
10, assembled in reverse order.
11, from the packing gland above the gap at the manual water or with the lubrication of water, manual car.
The superiority of cutting submersible sewage pump
As a well-known manufacturer of cutting submersible sewage pump, over the years the company along the industrialization, specialization and modernization of the road to first-class product quality and first-class service attitude, open up the market a great living space! Today, wholesale submersible pump manufacturers for everyone to talk about the advantages of cutting submersible sewage which!
1. The use of advanced technology, strong sewage capacity, no clogging, can effectively through the diameter of 30 to 80 mm of solid particles;
2. Tear the body to tear the fiber material, cut off, and then smooth emissions, without the need for filter on the filter;
3. Design reasonable, supporting motor power is small, energy-saving effect is remarkable;
4. The use of the latest material of the mechanical seal, you can make the pump safe continuous operation in 8000 hours or more;
5. Compact structure, easy to move, easy to install, can reduce the project cost, no need to build pump room;
6. can be used in the whole lift range, and ensure that the motor will not overload;
7. Float switch can be based on the required water level changes, automatic control of the pump start and stop, without special care;
8. Dual-rail automatic installation system, it is to install, repair has brought great convenience, people do not have to enter and leave the pits for this;
9. With automatic protection control box on the product leakage, leakage and overload, etc. to effectively protect and improve the product safety and reliability.
My company's products with high-quality, reasonable prices favored by customers and recognition, we are convinced that "sincere service, will be in exchange for your satisfaction with the smile"!
1. The use of advanced technology, strong sewage capacity, no clogging, can effectively through the diameter of 30 to 80 mm of solid particles;
2. Tear the body to tear the fiber material, cut off, and then smooth emissions, without the need for filter on the filter;
3. Design reasonable, supporting motor power is small, energy-saving effect is remarkable;
4. The use of the latest material of the mechanical seal, you can make the pump safe continuous operation in 8000 hours or more;
5. Compact structure, easy to move, easy to install, can reduce the project cost, no need to build pump room;
6. can be used in the whole lift range, and ensure that the motor will not overload;
7. Float switch can be based on the required water level changes, automatic control of the pump start and stop, without special care;
8. Dual-rail automatic installation system, it is to install, repair has brought great convenience, people do not have to enter and leave the pits for this;
9. With automatic protection control box on the product leakage, leakage and overload, etc. to effectively protect and improve the product safety and reliability.
My company's products with high-quality, reasonable prices favored by customers and recognition, we are convinced that "sincere service, will be in exchange for your satisfaction with the smile"!
The four structural forms of sewage pump impeller
Sewage pumps and other pumps, impeller, water chamber, sewage pump is the two core components. Sewage pump anti-clogging performance, the level of efficiency, and cavitation performance, anti-abrasion performance is mainly by the leaf pump and pressurized water room to ensure the two components. The structure of the impeller of the sewage pump is divided into four categories: blade type (open type, closed type), swirl type, flow channel type (including single channel and double flow channel) spiral centrifugal four kinds. The open half-open impeller is easy to manufacture. When the impeller is blocked, it can be easily cleaned and repaired. However, in the long run, the gap between the blade and the inner wall of the water chamber will increase So that efficiency is reduced. From the performance point of view, the type of impeller efficiency is low, the highest efficiency is about equivalent to about 92% of ordinary closed impeller, head curve is relatively flat.
1, sewage pump swirl impeller.
Pumps with this type of impeller are partially or completely shrinking from the plenum flow path. So no clogging performance is good, the ability of particles and long fiber through the ability of strong. There is no gap due to the increase in wear and tear, in the long run will not cause serious degradation of the problem, the use of the type of impeller pump is suitable for pumping large particles and long fibers containing the media. From the performance point of view, the impeller efficiency is low, only about 70% of ordinary closed impeller, head curve is relatively flat.
2, sewage pump closed impeller.
The type of impeller is generally more efficient. And in the long-term operation of the situation is relatively stable, the use of the type of impeller pump axial force is small, and can be set in front and rear cover sub-leaf. The secondary blades on the front cover reduce the vortex loss of the impeller inlet and the wear of the particles against the seal ring. The secondary blades on the rear cover do not only act as a balanced axial force, but also prevent the suspended particles from entering the mechanical seal chamber to protect the mechanical seal. But the type of impeller is not blocked poor, easy to wrap, should not be drawn with large particles (long fiber) and other treated sewage medium.
3, sewage pump flow path impeller.
The impeller is a leafless impeller, and the impeller runner is a curved runner from the inlet to the outlet. It is suitable for pumping a medium containing large particles and long fibers. Good resistance to blocking. From the performance point of view, the type of impeller efficiency and ordinary closed impeller is not much difference, but with this type of impeller pump head curve is more steep drop. Power curve is relatively stable, difficult to produce super power problem.
4, the sewage pump centrifugal impeller.
The blades of the impeller are twisted helical blades extending axially from the suction port on the conical hub body. The impeller pump and the role of the volume pump and centrifugal pump, suspended particles flow in the leaves, do not hit any part of the pump, so good for good. Destructive to transport. Due to the propulsive action of the spiral, the passage of suspended particles is strong, so the pump of this type is suitable for pumping medium containing large particles and long fibers, and high concentration of medium. In the destruction of the transmission medium has strict requirements of the occasion has obvious characteristics. From the performance point of view, the pump has a steep drop of the curve, the power curve is flat.
At the same time, the sewage pump manufacturers to remind you that: sewage pump flow channel is easy to plug, the pump will be blocked once the pump can not work properly, or even burn the motor, resulting in poor sewage. To the city life and environmental protection have a serious impact. Therefore, blocking and reliability is an important factor in the quality of sewage pump. For more information on sewage pump manufacturers please keep an eye on our website.
1, sewage pump swirl impeller.
Pumps with this type of impeller are partially or completely shrinking from the plenum flow path. So no clogging performance is good, the ability of particles and long fiber through the ability of strong. There is no gap due to the increase in wear and tear, in the long run will not cause serious degradation of the problem, the use of the type of impeller pump is suitable for pumping large particles and long fibers containing the media. From the performance point of view, the impeller efficiency is low, only about 70% of ordinary closed impeller, head curve is relatively flat.
2, sewage pump closed impeller.
The type of impeller is generally more efficient. And in the long-term operation of the situation is relatively stable, the use of the type of impeller pump axial force is small, and can be set in front and rear cover sub-leaf. The secondary blades on the front cover reduce the vortex loss of the impeller inlet and the wear of the particles against the seal ring. The secondary blades on the rear cover do not only act as a balanced axial force, but also prevent the suspended particles from entering the mechanical seal chamber to protect the mechanical seal. But the type of impeller is not blocked poor, easy to wrap, should not be drawn with large particles (long fiber) and other treated sewage medium.
3, sewage pump flow path impeller.
The impeller is a leafless impeller, and the impeller runner is a curved runner from the inlet to the outlet. It is suitable for pumping a medium containing large particles and long fibers. Good resistance to blocking. From the performance point of view, the type of impeller efficiency and ordinary closed impeller is not much difference, but with this type of impeller pump head curve is more steep drop. Power curve is relatively stable, difficult to produce super power problem.
4, the sewage pump centrifugal impeller.
The blades of the impeller are twisted helical blades extending axially from the suction port on the conical hub body. The impeller pump and the role of the volume pump and centrifugal pump, suspended particles flow in the leaves, do not hit any part of the pump, so good for good. Destructive to transport. Due to the propulsive action of the spiral, the passage of suspended particles is strong, so the pump of this type is suitable for pumping medium containing large particles and long fibers, and high concentration of medium. In the destruction of the transmission medium has strict requirements of the occasion has obvious characteristics. From the performance point of view, the pump has a steep drop of the curve, the power curve is flat.
At the same time, the sewage pump manufacturers to remind you that: sewage pump flow channel is easy to plug, the pump will be blocked once the pump can not work properly, or even burn the motor, resulting in poor sewage. To the city life and environmental protection have a serious impact. Therefore, blocking and reliability is an important factor in the quality of sewage pump. For more information on sewage pump manufacturers please keep an eye on our website.
2017年2月23日星期四
Use of coaxial submersible pumps
What is the use of coaxial submersible pumps? Here is a brief introduction to the.
Coaxial submersible pump is a submersible pump impeller mounted directly on the motor shaft extension, pump one. It is characterized by compact structure, easy installation, no need to pump room, small footprint, to achieve long-distance control operation, safe and reliable, easy maintenance, submersible pump volume short rough. Can be used for drainage and drainage, surface drainage, urban drainage, agricultural irrigation and drainage.
Conditions of Use
1. The motor must be filled with clean water or other aqueous solution as specified.
2. Submersible pumps should be fully submerged in water.
3. Water temperature is not higher than 20 ℃.
4. The content of solid impurities in water does not exceed 0.01%.
5. Water does not contain chemical corrosion substances, PH value between 6.5-8.5.
System components: coaxial submersible pump by the submersible motor, submersible pumps, power cables, signal cables, joint materials, gate valve, check valve, elbow and other components.
Coaxial submersible pump is a submersible pump impeller mounted directly on the motor shaft extension, pump one. It is characterized by compact structure, easy installation, no need to pump room, small footprint, to achieve long-distance control operation, safe and reliable, easy maintenance, submersible pump volume short rough. Can be used for drainage and drainage, surface drainage, urban drainage, agricultural irrigation and drainage.
Conditions of Use
1. The motor must be filled with clean water or other aqueous solution as specified.
2. Submersible pumps should be fully submerged in water.
3. Water temperature is not higher than 20 ℃.
4. The content of solid impurities in water does not exceed 0.01%.
5. Water does not contain chemical corrosion substances, PH value between 6.5-8.5.
System components: coaxial submersible pump by the submersible motor, submersible pumps, power cables, signal cables, joint materials, gate valve, check valve, elbow and other components.
Shanghai Weihu Pump
is a modern enterprise with joint-stock system as product, scientific research,
development, design, production and sales. As a professional water pump manufacturer , wholesale submersible pumps, choose Weihu Pump, we are committed to you Procurement
to provide professional consultancy services to ensure that you buy the right
model, the right material, cost-effective pump products, if you have other
aspects of the problem, you can call our technical experts, experts will give a
professional answer.
What is the HW mixed flow pump
HW mixed flow pump, also known as horizontal chemical mixed flow pump, as the name suggests, HW mixed flow pump is a horizontal mixed flow pump, which is mainly used in chemical processes, in order to transport corrosive or neutral cleaning media or particles Medium, can be used to meet the user needs a variety of corrosion-resistant and wear-resistant materials, so the main application in large flow, low head of the occasion, such as chemical process forced circulation, urban gas engineering, mariculture, water treatment systems, Farmland irrigation and drainage and so on.
HW mixed flow pump is a packing seal or mechanical seal, the use of motor or internal combustion engine as the driving force, and the shaft system has adopted the "rear door" structure, installation, easy to disassemble, while HW mixed flow pump is equipped with a complete deflation device , Easy to pump exhaust. In the structure above, the pump foot can withstand the full load of the pump, the structure is strong, so durable, long life, especially the HW mixed flow pump hydraulic model advanced, pump energy efficient, energy consumption in the entire performance range, The case of the valve to start, the motor will not be overloaded, over flow section, not easy to plug.
HW main flow pump main parameters:
Flow: Q up to 2600m3 / h
Head: H up to 15m
Working pressure: P up to 0.6MPa
Working temperature: T is -20 ~ + 180 ℃
Special instructions, if the pump has special requirements, can be directly linked with the mixed flow pump manufacturers, according to the requirements of custom.
HW mixed flow pump is a packing seal or mechanical seal, the use of motor or internal combustion engine as the driving force, and the shaft system has adopted the "rear door" structure, installation, easy to disassemble, while HW mixed flow pump is equipped with a complete deflation device , Easy to pump exhaust. In the structure above, the pump foot can withstand the full load of the pump, the structure is strong, so durable, long life, especially the HW mixed flow pump hydraulic model advanced, pump energy efficient, energy consumption in the entire performance range, The case of the valve to start, the motor will not be overloaded, over flow section, not easy to plug.
HW main flow pump main parameters:
Flow: Q up to 2600m3 / h
Head: H up to 15m
Working pressure: P up to 0.6MPa
Working temperature: T is -20 ~ + 180 ℃
Special instructions, if the pump has special requirements, can be directly linked with the mixed flow pump manufacturers, according to the requirements of custom.
Some of the close links of the components of the axial flow pump
For the axial flow pump seal inspection whether the damage, deformation, spring will not fall off, rust, to prevent the oil seal in the transport process by external forces, and so on, damage and damage its roundness. Polypropylene (polypropylene) powder and nitrogen (nitrogen) working medium. The device has a high, medium and low pressure three sealed oil system, so the 501A / C B low voltage system for both users. The production process requires C 501A B / run a backup, in the shaft parts without burrs, sand, iron and other debris, to prevent accidental damage to the oil seal lip, cavity size, suitable for diameter and width of the seal. Oil seal has a lubricating oil return line, must first determine the seal installation direction and rotation relationship. Self-priming pump suction pipe as short as possible to reduce the loss of the road. In order to prevent the bottom of the sedimentation tank water intake is higher than the bottom is correct? Less than 0.8D. D suction tube diameter is the widest, usually 1.3 to 1.5 times the diameter of the pipe. The pool side of the water pipe is not less than Bell (1,0.75), the edge of the wall is not less than Bell (1,0.75). The component should be in the oil seal lip between the amount of smear added molybdenum disulfide lithium grease clean ointment to prevent the shaft in the starting torque, lip caused by dry friction phenomenon, the impact of lip interference after careful consideration, Thickness and structure are not much change, the use of 65mm × 90mm × 10mm assembly rotating shaft lip ring (Figure 2). The improvement of the three consecutive years did not occur again in the discharge analysis frame leading to such a good sealing effect, there are several aspects: (1) compared with the mechanical seal, by the spring and rubber lip seal, shaft rotation radial run Allowable range; (2) C-501a B / sealed atmospheric pressure and leakage.
(3) Sealing medium Main lubricants and non-flammable hydrocarbons or other toxic media, C-501a / B working medium Polypropylene powder, nitrogen, and gearboxes are mainly a small amount of nitrogen, even if the leak Will not cause any pollution and harm. Cardboard keyway or ladder part of the package, to avoid scratch or roll seal lip, or guide sleeve and special tool pressure rotary seal. Do not hard, so that the overall performance of the pumping station to achieve the best. 2 Pump station hydraulic parameters Model 1 2 Pump station parameters High port pump station is a water pump, drainage of the two-way pumping station, water diversion and drainage design flow direction is 3 000 cubic meters / second elevator function, install a few straw, The loudspeaker distance does not exceed (1.5 to 2) D to reduce the head loss of the inlet pipe and the pool. The pipes usually have a lot of impurities in the form of a bell, such as water. The ringtone is set to a screen. In order to prevent the deformation of the oil seal, destroyed the spring. Such as lip flanging, sealed spring skew, remove must be reloaded. Proper use of special installation tools to protect the mouth from damage. Easily lead to leakage of oil, even if it is not allowed. Characteristics of the high port pump station with water and drainage is a two-way pumping station, water diversion and drainage design flow direction is 30,000 m3 / features American pump station when the pump starts. The pipe should be fitted with a valve (only by the suction of the pump is arranged, not from the outflow. Should not leak.) If the water pipe leaks, the flow and water will be reduced in the ceiling, if it is a fixed installation of the self-priming pump for the pipeline To prevent leakage.
Then it should not be natural gas. The gas in the tube product can form the airbag, the capacity of the water, and the effect of the vacuum. In order to prevent the formation of air bags, axial flow pump is the main energy recovery device. In the development of hydraulic model of axial flow pump, the optimal design of guide vane and impeller should be considered. In the technical transformation of the pump station, often encountered guide leaf replacement problem. Oil seal assembly is an important part of surface roughness and surface quality. In the assembly, should check the walls of debris, scratches, dirt and carbon.
(3) Sealing medium Main lubricants and non-flammable hydrocarbons or other toxic media, C-501a / B working medium Polypropylene powder, nitrogen, and gearboxes are mainly a small amount of nitrogen, even if the leak Will not cause any pollution and harm. Cardboard keyway or ladder part of the package, to avoid scratch or roll seal lip, or guide sleeve and special tool pressure rotary seal. Do not hard, so that the overall performance of the pumping station to achieve the best. 2 Pump station hydraulic parameters Model 1 2 Pump station parameters High port pump station is a water pump, drainage of the two-way pumping station, water diversion and drainage design flow direction is 3 000 cubic meters / second elevator function, install a few straw, The loudspeaker distance does not exceed (1.5 to 2) D to reduce the head loss of the inlet pipe and the pool. The pipes usually have a lot of impurities in the form of a bell, such as water. The ringtone is set to a screen. In order to prevent the deformation of the oil seal, destroyed the spring. Such as lip flanging, sealed spring skew, remove must be reloaded. Proper use of special installation tools to protect the mouth from damage. Easily lead to leakage of oil, even if it is not allowed. Characteristics of the high port pump station with water and drainage is a two-way pumping station, water diversion and drainage design flow direction is 30,000 m3 / features American pump station when the pump starts. The pipe should be fitted with a valve (only by the suction of the pump is arranged, not from the outflow. Should not leak.) If the water pipe leaks, the flow and water will be reduced in the ceiling, if it is a fixed installation of the self-priming pump for the pipeline To prevent leakage.
Then it should not be natural gas. The gas in the tube product can form the airbag, the capacity of the water, and the effect of the vacuum. In order to prevent the formation of air bags, axial flow pump is the main energy recovery device. In the development of hydraulic model of axial flow pump, the optimal design of guide vane and impeller should be considered. In the technical transformation of the pump station, often encountered guide leaf replacement problem. Oil seal assembly is an important part of surface roughness and surface quality. In the assembly, should check the walls of debris, scratches, dirt and carbon.
Mixed flow pump used in the process of fever
Mixed flow pump how to use the process of fever? First of all, we have to look at what is clear where the heat, the general mixed flow pump is easy to heat where the bearings and packing, and then we have to find the cause of bearing or filler fever and the reasons for the corresponding reasons to solve.
Mixed flow pump bearing heat causes are:
1. Lubricant is insufficient. → this reason naturally need to refuel.
2. Lubricant quality is not good or not clean. → This requires cleaning the bearing to replace the appropriate lubricant.
3. The axis center is not aligned. → solution to find correct.
4. bearing wear. → to replace the bearing.
5. The belt is too tight. → it is appropriate to relax.
Mixed flow pump filler fever reasons are:
1. The packing is too tight and the tightness is tight. → we need to loose gland nuts, adjust the filler.
2. The packing is skewed so that the sleeve is unevenly rubbed. → You can loosen the gland and re-tighten it evenly.
Mixed flow pump bearing heat causes are:
1. Lubricant is insufficient. → this reason naturally need to refuel.
2. Lubricant quality is not good or not clean. → This requires cleaning the bearing to replace the appropriate lubricant.
3. The axis center is not aligned. → solution to find correct.
4. bearing wear. → to replace the bearing.
5. The belt is too tight. → it is appropriate to relax.
Mixed flow pump filler fever reasons are:
1. The packing is too tight and the tightness is tight. → we need to loose gland nuts, adjust the filler.
2. The packing is skewed so that the sleeve is unevenly rubbed. → You can loosen the gland and re-tighten it evenly.
Cause Analysis and Solution of Excessive Power Consumption of Mixed flow Pump
In the use of mixed flow pump in the process, it will be reflected that the consumption of mixed-flow pump power is getting bigger and bigger, and encountered this situation we must take a good look, resulting in mixed-flow pump power is too large are generally there are reasons Of the need to find the cause and solve it in order to effectively maintain and use good.
Mixed flow pump power consumption too much reason and the corresponding approach:
1, check whether the speed setting is too high. The solution is naturally to reduce the speed.
2, check whether the rotating shaft is bent. Solution to straighten the drive shaft.
3, check whether the bearing wear or damage. There must be replacement.
4, check whether the belt is too tight pull. Yes to see if the situation is appropriate to relax.
5, check whether the packing is too tight pressure. You can unscrew the gland nut or remove the packing out.
Mixed flow pump power consumption too much reason and the corresponding approach:
1, check whether the speed setting is too high. The solution is naturally to reduce the speed.
2, check whether the rotating shaft is bent. Solution to straighten the drive shaft.
3, check whether the bearing wear or damage. There must be replacement.
4, check whether the belt is too tight pull. Yes to see if the situation is appropriate to relax.
5, check whether the packing is too tight pressure. You can unscrew the gland nut or remove the packing out.
Detection of bellows in axial flow pump
In order to ensure axial flow pump traveling wave tube amplifier has the characteristics of small volume, light weight, high efficiency and high reliability, the importance of the high voltage power supply supporting the traveling wave tube is self-evident. In order to realize the high index of the traveling wave tube amplifier Requirements, the high voltage power output of the pole voltage must have good stability and low ripple. The pulsed high voltage power supply must be highly efficient to help reduce the thermal design pressure of the pulsed high voltage power supply, providing the possibility of a reduction in volume and weight, which can greatly improve the reliability of the pulsed high voltage power supply.
A bellows is a cylindrical thin-walled crimp housing having a plurality of transverse corrugations. Control valve on the role of the bellows only one - isolated, mainly divided into three kinds: one is to prevent the valve medium spread to the outside world, that is, for the flow of chemicals within the valve for the chemical nature of lively or toxic and harmful gases Volatile liquid and precious media The traditional radar antenna will emit a microwave scan of a space area, any target object will reflect these signals back, but the region of low-reflectivity objects will issue a high background noise, so the traditional radar The system is difficult to locate.
By the Ministry of Science and Technology organized by the field of technical acceptance of experts believe that this marks the SOFC system independent power generation technology has made new breakthroughs, with basic access to engineering and product of the stage of the conditions, the use of double-stack module and thermal-electric collaborative control technology , Power generation efficiency of 46.5%, cogeneration power utilization rate of up to 79.7%; which uses a large area of single cell power density of up to 1.2W per square centimeter, the decay rate of only 0.41% per thousand hours, reached the international advanced level, Organic optoelectronic materials singlet and triplet excited state, because of its high degree of lively, its life at room temperature are usually in the order of nanosecond and milliseconds, light time can only be measured by precision instruments can not be measured, the human eye can not distinguish. "We have designed and prepared several series of single-component organic long-life phosphorescent materials at room temperature, and the excited state has a long life span of seconds. Not only that, we have also created a new method of data encryption. With the action of the valve, the stem will bring these substances into the valve or accumulate in the stem packing, easy to cause the valve medium pollution and valve lock; the last one is to protect the internal parts of the valve to prevent the media caused by the stem Scour and corrosion.
In order to ensure that the wave tube amplifier with small size, light weight, high efficiency and high reliability, and traveling wave tube supporting the importance of high-voltage power is self-evident. In order to achieve the wave tube amplifier high index requirements, high voltage power output of the pole voltage must have good stability and low ripple. The traditional radar antenna will issue a microwave scan of a space area, any target object will reflect these signals back, but the region of low reflectivity objects will send a high background noise, so the traditional radar system is difficult to locate.
A bellows is a cylindrical thin-walled crimp housing having a plurality of transverse corrugations. Control valve on the role of the bellows only one - isolated, mainly divided into three kinds: one is to prevent the valve medium spread to the outside world, that is, for the flow of chemicals within the valve for the chemical nature of lively or toxic and harmful gases Volatile liquid and precious media The traditional radar antenna will emit a microwave scan of a space area, any target object will reflect these signals back, but the region of low-reflectivity objects will issue a high background noise, so the traditional radar The system is difficult to locate.
By the Ministry of Science and Technology organized by the field of technical acceptance of experts believe that this marks the SOFC system independent power generation technology has made new breakthroughs, with basic access to engineering and product of the stage of the conditions, the use of double-stack module and thermal-electric collaborative control technology , Power generation efficiency of 46.5%, cogeneration power utilization rate of up to 79.7%; which uses a large area of single cell power density of up to 1.2W per square centimeter, the decay rate of only 0.41% per thousand hours, reached the international advanced level, Organic optoelectronic materials singlet and triplet excited state, because of its high degree of lively, its life at room temperature are usually in the order of nanosecond and milliseconds, light time can only be measured by precision instruments can not be measured, the human eye can not distinguish. "We have designed and prepared several series of single-component organic long-life phosphorescent materials at room temperature, and the excited state has a long life span of seconds. Not only that, we have also created a new method of data encryption. With the action of the valve, the stem will bring these substances into the valve or accumulate in the stem packing, easy to cause the valve medium pollution and valve lock; the last one is to protect the internal parts of the valve to prevent the media caused by the stem Scour and corrosion.
In order to ensure that the wave tube amplifier with small size, light weight, high efficiency and high reliability, and traveling wave tube supporting the importance of high-voltage power is self-evident. In order to achieve the wave tube amplifier high index requirements, high voltage power output of the pole voltage must have good stability and low ripple. The traditional radar antenna will issue a microwave scan of a space area, any target object will reflect these signals back, but the region of low reflectivity objects will send a high background noise, so the traditional radar system is difficult to locate.
Structural Characteristics of Horizontal Mixed flow Pump
Horizontal mixed flow pump from the shape, the structure is between the centrifugal pump and axial flow pump; mixed flow pump principle, the high-speed rotation of the impeller, mixed flow pump both produce centrifugal centrifugal force, but also has the axial lift pump lift, The mixed flow pump is pumped by the mixing of these two forces. Mixed-flow pump performance is also between the centrifugal pump and axial flow pump, and centrifugal pump compared to the lower head, while the flow of some larger; it compared with the axial pump, the lift higher, but the flow is smaller. This is a vast territory for our country, the terrain is complex, more of a pump according to local conditions of choice.
The mixed-flow pump is the main equipment for the transportation and upgrading of water in the pumping station. In the water supply and drainage works of the towns and industrial enterprises, the large-scale water pump is the vane type pump, and the centrifugal pump is the most common. Mixed pump pumping principle, the high-speed rotation of the impeller, both the centrifugal force of the centrifugal pump, but also has the axial lift pump lift force, mixed flow pump by the combination of these two forces pumping. Mixed-flow pump performance is also between the centrifugal pump and axial flow pump, and centrifugal pump compared to the lower head, while the flow of some larger; it compared with the axial pump, the lift higher, but the flow is smaller.
When the original motive drive impeller rotation, the role of the liquid both centrifugal force and axial thrust, centrifugal pump and axial pump is a comprehensive. So it is a pump between the centrifugal pump and the axial flow pump. The flow rate of the mixed flow pump is higher than that of the centrifugal pump, which is lower than the axial flow pump, usually between 300-500. Its head is higher than the axial pump, but the flow rate is lower than that of the centrifugal pump than the centrifugal pump. Mixed flow pump is mainly used for agricultural irrigation and drainage, and also for urban drainage, can be used as a thermal power plant circulating pump.
The mixed-flow pump is the main equipment for the transportation and upgrading of water in the pumping station. In the water supply and drainage works of the towns and industrial enterprises, the large-scale water pump is the vane type pump, and the centrifugal pump is the most common. Mixed pump pumping principle, the high-speed rotation of the impeller, both the centrifugal force of the centrifugal pump, but also has the axial lift pump lift force, mixed flow pump by the combination of these two forces pumping. Mixed-flow pump performance is also between the centrifugal pump and axial flow pump, and centrifugal pump compared to the lower head, while the flow of some larger; it compared with the axial pump, the lift higher, but the flow is smaller.
When the original motive drive impeller rotation, the role of the liquid both centrifugal force and axial thrust, centrifugal pump and axial pump is a comprehensive. So it is a pump between the centrifugal pump and the axial flow pump. The flow rate of the mixed flow pump is higher than that of the centrifugal pump, which is lower than the axial flow pump, usually between 300-500. Its head is higher than the axial pump, but the flow rate is lower than that of the centrifugal pump than the centrifugal pump. Mixed flow pump is mainly used for agricultural irrigation and drainage, and also for urban drainage, can be used as a thermal power plant circulating pump.
Several coup about increasing the use of mixed flow pump
Increase the use of mixed flow pump time must be every mixed-flow pump users are fascinating things, in order to achieve must understand the basic knowledge of mixed-flow pump and the use of skills, today mixed flow pump manufacturers and talk about the flow of mixed-flow pump science Used to increase the use of mixed-flow pump 10 coup.
1, when the mixed-flow pump bearings with thin oil lubrication, we must always check the bearing body of the oil standard, always control the oil rod between the two marking; bearing grease lubrication, the time should be added to the amount of oil.
2, in the mixed flow pump work, pay attention to observe the bearing temperature, generally not higher than the ambient temperature of 40 degrees, the maximum does not exceed 80 degrees.
3, pay attention to whether the pump running friction and impact, such as pump cover and impeller friction, pump cover and pump can be increased between the paper pad, the time to use intermittent.
4, the packing must be adjusted, the liquid should be from the packing gland at the drop-like intermittent leakage. The packing is too tight, the shaft will heat and increase the power; the packing is too loose, the liquid leaks too much and the efficiency is reduced.
5, such as motor and mixed flow pump directly, the axis of the two axes should be in a straight line.
6, check the mixed flow pump water inlet and outlet phenomenon.
7, pay attention to whether the sudden increase in power or reduce the flow is suddenly reduced, there is such a phenomenon, should immediately stop the inspection.
8, often check whether the bolt for a long time and loose.
9, in the winter, after stopping to keep the mixed flow pump and water inside the water pipe.
10, for long-term suspension of the mixed flow pump, the operating part should be removed for rust treatment properly safe custody.
The scientific use of the mixed-flow pump has a positive effect on extending the use time of the mixed-flow pump, improper use, and easy to shorten the use time of the mixed-flow pump.
1, when the mixed-flow pump bearings with thin oil lubrication, we must always check the bearing body of the oil standard, always control the oil rod between the two marking; bearing grease lubrication, the time should be added to the amount of oil.
2, in the mixed flow pump work, pay attention to observe the bearing temperature, generally not higher than the ambient temperature of 40 degrees, the maximum does not exceed 80 degrees.
3, pay attention to whether the pump running friction and impact, such as pump cover and impeller friction, pump cover and pump can be increased between the paper pad, the time to use intermittent.
4, the packing must be adjusted, the liquid should be from the packing gland at the drop-like intermittent leakage. The packing is too tight, the shaft will heat and increase the power; the packing is too loose, the liquid leaks too much and the efficiency is reduced.
5, such as motor and mixed flow pump directly, the axis of the two axes should be in a straight line.
6, check the mixed flow pump water inlet and outlet phenomenon.
7, pay attention to whether the sudden increase in power or reduce the flow is suddenly reduced, there is such a phenomenon, should immediately stop the inspection.
8, often check whether the bolt for a long time and loose.
9, in the winter, after stopping to keep the mixed flow pump and water inside the water pipe.
10, for long-term suspension of the mixed flow pump, the operating part should be removed for rust treatment properly safe custody.
The scientific use of the mixed-flow pump has a positive effect on extending the use time of the mixed-flow pump, improper use, and easy to shorten the use time of the mixed-flow pump.
Method and procedure for troubleshooting of sewage pump
Method and procedure for troubleshooting of sewage pump
1, first cut off the power, check the power supply insulation resistance.
2, if the power is power, check the start switch is faulty, the fuse is intact, wiring is loose, the contact contact is good, the pump cable connected to the power supply is intact.
3, if the insulation resistance in the allowable range, check the power supply line is enough electricity, for the three-phase power supply to check whether the three-phase power supply.
4, if the voltage is normal, turn on the power of the pump for no-load operation.
5, listen to the no-load running sound is normal, the pump steering is correct, if the pump reverse operation, then cut off the power exchange three-phase power cord in any two lines, restart, see the steering is correct.
6, if the operation is not normal, should immediately cut off the power, check the analysis of the fault is in the motor part, the pump part or mechanical seal part.
7, check whether the fault is part of the sewage pump, if the fault in the pump part:
A, check the filter, impeller flow is blocked or strayed by debris.
B, check the pump, pump bolt is tight, pump, pump cover between the leak, oil seal is intact.
C, check the impeller and pump, pump cover whether there is friction.
D, check the pump and pipe joints are leaked.
Shanghai Weihu Pump is a modern enterprise with joint-stock system as product, scientific research, development, design, production and sales. As a professional water pump manufacturer , wholesale sewage pump, choose Weihu Pump, we are committed to you Procurement to provide professional consultancy services to ensure that you buy the right model, the right material, cost-effective pump products, if you have other aspects of the problem, you can call our technical experts, experts will give a professional answer.
1, first cut off the power, check the power supply insulation resistance.
2, if the power is power, check the start switch is faulty, the fuse is intact, wiring is loose, the contact contact is good, the pump cable connected to the power supply is intact.
3, if the insulation resistance in the allowable range, check the power supply line is enough electricity, for the three-phase power supply to check whether the three-phase power supply.
4, if the voltage is normal, turn on the power of the pump for no-load operation.
5, listen to the no-load running sound is normal, the pump steering is correct, if the pump reverse operation, then cut off the power exchange three-phase power cord in any two lines, restart, see the steering is correct.
6, if the operation is not normal, should immediately cut off the power, check the analysis of the fault is in the motor part, the pump part or mechanical seal part.
7, check whether the fault is part of the sewage pump, if the fault in the pump part:
A, check the filter, impeller flow is blocked or strayed by debris.
B, check the pump, pump bolt is tight, pump, pump cover between the leak, oil seal is intact.
C, check the impeller and pump, pump cover whether there is friction.
D, check the pump and pipe joints are leaked.
Shanghai Weihu Pump is a modern enterprise with joint-stock system as product, scientific research, development, design, production and sales. As a professional water pump manufacturer , wholesale sewage pump, choose Weihu Pump, we are committed to you Procurement to provide professional consultancy services to ensure that you buy the right model, the right material, cost-effective pump products, if you have other aspects of the problem, you can call our technical experts, experts will give a professional answer.
Deep wall submersible pump supporting cable technical requirements
The specifications of the power cable with the deep well submersible pump are determined by the heating and voltage drop of the cable. In addition to the need to control a certain current density to limit the temperature rise of the cable, the longer the length of the cable, the greater the voltage drop of the cable, the starting performance of the motor, running performance and reliability of the greater impact. Therefore, the same well with the diving motor, when equipped with deep well submersible pump head is different, with cable length is different, the requirements of the cable cross-section is not the same. In accordance with GB / T 2816 "well submersible pump" standard, the water temperature is 25 ℃, the current rating, the cable voltage drop should not be greater than 5% of the rated voltage. Which can be obtained when the power supply voltage of 380V, different power wells with a diving motor with a certain size of the cable when the maximum allowable length. When the grid supply voltage is higher and more stable or the capacity of the power supply transformer is relatively large, the voltage is high, more stable, the well with the diving motor with the same length of the allowable length of the cable can be appropriate as appropriate The cable cross-section is properly reduced to reduce the cost of cable configuration). The maximum allowable length of the cable fitted with the submersible motor is shown in Table 2-2.
When the deep well submersible pump head is very high, the motor down the well, with a long cable length, and the transformer power quality is poor, the motor is very difficult to start: the starting current is very large, long cable voltage drop, The voltage drops a lot, the starting current is further increased, the cable voltage drop is larger, the starting torque is lower, resulting in a vicious cycle, not only the motor start difficult, forced start may cause the motor winding damage. At this time, in addition to the provisions of Table 2-1 in accordance with the provisions of the cable, it is best to increase the transformer supply voltage.
When the deep well submersible pump head is very high, the motor down the well, with a long cable length, and the transformer power quality is poor, the motor is very difficult to start: the starting current is very large, long cable voltage drop, The voltage drops a lot, the starting current is further increased, the cable voltage drop is larger, the starting torque is lower, resulting in a vicious cycle, not only the motor start difficult, forced start may cause the motor winding damage. At this time, in addition to the provisions of Table 2-1 in accordance with the provisions of the cable, it is best to increase the transformer supply voltage.
Technical requirements for submersible sewage pumps
Shanghai is a modern enterprise with joint-stock system as product, scientific research, development, design, production and sales. As a professional water pump manufacturer, wholesale submersible pump, choose Weihu Pump, we are committed to you Procurement to provide professional Consultancy services to ensure that you buy the right model, the right material, cost-effective pump products,
The following professional wholesale submersible pump manufacturers to introduce the technical requirements of submersible sewage pump:
1, submersible sewage pump can be sent with rags, short fiber materials and general waste and other untreated sewage, and through the diameter of 50% of the diameter of the solid particles.
2, submersible sewage pump can work within the specified range, no cavitation occurred, smooth operation, no stuck, stagnation, and has a stable pressure characteristics of the head, when the pump in its characteristic curve on the run, the motor Power is not overloaded.
3, submersible sewage pump all pressure parts are for air pressure test, the test pressure for its design pressure of 2 times, but not less than 0.45Mpa, which lasted 30min without leakage.
4, submersible sewage pump in the assembly, the 0.2MPa pressure test, which lasted 30min without leakage.
5, submersible sewage pump all parts, seals, anti-corrosion coatings are used in line with national standards of the material, the surface of light, no trachoma, cracks, etc., in order to prevent submersible sewage pump due to media erosion, where the water contact Are used for anti-salt, anti-corrosion spray treatment, the surface of the use of shot blasting secondary rust and reached Sa2.5 level, and then sprayed with corrosion-resistant epoxy resin powder treatment, coating thickness greater than 0.3 mm less than 1.4 mm, Road surface smooth and smooth, can guarantee the use of the coating is not less than 5 years.
6, submersible sewage pump impeller, rotor dynamic balance test, the balance accuracy of G6.3 level, the vibration is not greater than 0.45mms.
7, submersible sewage pump with water jacket cooling system, can ensure that the submersible motor completely exposed to the surface under the conditions of continuous operation, running for continuous operation, gap operation or long-term stop the resumption of operation, allowed to start 15 times per hour without Caused by any damage, in order to ensure that the motor temperature is not greater than the required requirements, the motor structure with internal and external cooling ventilation structure, the internal ventilation structure to ensure that the motor temperature quickly through the internal air cooling, external cooling mainly through the water jacket in the flow The media water to the motor surface temperature from the media to achieve the purpose of cooling, each submersible sewage pump has a perfect, the internal cooling system, the motor cooling jacket surrounded by the stator chamber, the impeller back of the blade produced by the back pressure The part of the pumped liquid can pass through a circulation passage and circulate as a cooling liquid in the cooling system. The cooling system ensures that the submersible sewage pump can operate continuously at ambient temperatures up to 40 ° C, regardless of whether the motor is partially immersed in the pumped liquid or exposed directly to the air.
8, submersible sewage pump unit allows reversal, the maximum reversal speed for the operation may occur in the maximum flying speed, rated speed of 130%, in the case of duration 2min, the parts will not be damaged To ensure the safety of the unit, submersible sewage pump in the bearing structure design, bearing strength design, impeller strength calculation, according to the possible maximum fly reversal speed design.
9, stainless steel sewage pump nameplate firmly fixed in the clear position of each pump, the nameplate with stamping digital signs.
10, the lifting ear of each pump placed in the lid near the pump center of gravity solid and reliable.
The following professional wholesale submersible pump manufacturers to introduce the technical requirements of submersible sewage pump:
1, submersible sewage pump can be sent with rags, short fiber materials and general waste and other untreated sewage, and through the diameter of 50% of the diameter of the solid particles.
2, submersible sewage pump can work within the specified range, no cavitation occurred, smooth operation, no stuck, stagnation, and has a stable pressure characteristics of the head, when the pump in its characteristic curve on the run, the motor Power is not overloaded.
3, submersible sewage pump all pressure parts are for air pressure test, the test pressure for its design pressure of 2 times, but not less than 0.45Mpa, which lasted 30min without leakage.
4, submersible sewage pump in the assembly, the 0.2MPa pressure test, which lasted 30min without leakage.
5, submersible sewage pump all parts, seals, anti-corrosion coatings are used in line with national standards of the material, the surface of light, no trachoma, cracks, etc., in order to prevent submersible sewage pump due to media erosion, where the water contact Are used for anti-salt, anti-corrosion spray treatment, the surface of the use of shot blasting secondary rust and reached Sa2.5 level, and then sprayed with corrosion-resistant epoxy resin powder treatment, coating thickness greater than 0.3 mm less than 1.4 mm, Road surface smooth and smooth, can guarantee the use of the coating is not less than 5 years.
6, submersible sewage pump impeller, rotor dynamic balance test, the balance accuracy of G6.3 level, the vibration is not greater than 0.45mms.
7, submersible sewage pump with water jacket cooling system, can ensure that the submersible motor completely exposed to the surface under the conditions of continuous operation, running for continuous operation, gap operation or long-term stop the resumption of operation, allowed to start 15 times per hour without Caused by any damage, in order to ensure that the motor temperature is not greater than the required requirements, the motor structure with internal and external cooling ventilation structure, the internal ventilation structure to ensure that the motor temperature quickly through the internal air cooling, external cooling mainly through the water jacket in the flow The media water to the motor surface temperature from the media to achieve the purpose of cooling, each submersible sewage pump has a perfect, the internal cooling system, the motor cooling jacket surrounded by the stator chamber, the impeller back of the blade produced by the back pressure The part of the pumped liquid can pass through a circulation passage and circulate as a cooling liquid in the cooling system. The cooling system ensures that the submersible sewage pump can operate continuously at ambient temperatures up to 40 ° C, regardless of whether the motor is partially immersed in the pumped liquid or exposed directly to the air.
8, submersible sewage pump unit allows reversal, the maximum reversal speed for the operation may occur in the maximum flying speed, rated speed of 130%, in the case of duration 2min, the parts will not be damaged To ensure the safety of the unit, submersible sewage pump in the bearing structure design, bearing strength design, impeller strength calculation, according to the possible maximum fly reversal speed design.
9, stainless steel sewage pump nameplate firmly fixed in the clear position of each pump, the nameplate with stamping digital signs.
10, the lifting ear of each pump placed in the lid near the pump center of gravity solid and reliable.
Advantages of submersible sewage pump
Diving sewage pump is a pump and motor Siamese, and at the same time into the liquid under the pump products, compared with the general horizontal pump or vertical sewage pump, submersible sewage pump has obvious the following aspects of the advantages:
1. Compact structure, small footprint. Diving sewage pump submerged as a result of submerged work, it can be installed directly in the sewage pool, without the need to build a dedicated pump room to install pumps and machines, you can save a lot of land and infrastructure costs.
2. Easy installation and maintenance. Small submersible sewage pump can be free to install, large submersible sewage pump are generally equipped with automatic coupling device can be installed automatically, installation and maintenance is very convenient.
3. Continuous running for a long time. Diving sewage pump due to pump and motor coaxial, shaft short, rotating parts of light weight, so the bearing bear the radial load is relatively small, life is much longer than the average pump.
4. There is no problem such as cavitation damage and irrigation. Especially after the operation of the staff to bring a lot of convenience.
5. Vibration noise is small, the motor temperature is low, no pollution to the environment.
It is precisely because of the above advantages, submersible sewage pump has been more and more people's attention, the use of more and more wide range, from the original simply used to transport water to the present can transport a variety of domestic sewage, industrial wastewater, Site drainage, liquid feed and so on.
In the municipal engineering, industry, hospitals, construction, hotels, water conservancy construction and other industries play a very important role.
But anything is divided into two, for the submersible sewage pump is the most critical issue is the reliability of the problem, because the use of submersible sewage pump is in the liquid; transport medium is a mixture of solid materials containing some of the material; Pump and motor close; pump for the vertical arrangement, the weight of rotating parts and impeller to withstand the same water pressure. These problems make the submersible sewage pump in the seal, the motor carrying capacity, bearing layout and selection requirements are higher than the average sewage pump.
In order to improve the life of submersible sewage pump, most manufacturers at home and abroad are in the pump protection system to find a way, that is, in the pump leakage, overload, over temperature and other failures can be automatic alarm, and automatic shutdown repair. But we believe that in the submersible sewage pump to set the protection system is necessary, it can effectively protect the safe operation of the pump. But this is not the key to the problem, the protection system is only a failure in the pump after a remedy, is a more passive approach. The key issue should be from the fundamental, completely solve the pump in the seal, overload and other aspects of the problem, this is a more proactive approach. For this reason, we have the impeller fluid power sealing technology and pump without overload design technology used in submersible sewage pump, a greater increase in the pump seal reliability and carrying capacity, extending the pump life.
Application of the Impeller Fluid Power Sealing Technology
The so-called secondary impeller hydrodynamic seal means that an open impeller is mounted in the opposite direction to the opposite side of the back of the impeller rear cover. When the pump is in operation, the auxiliary impeller rotates with the pump spindle, and the liquid in the secondary impeller rotates together. The rotating liquid produces an outward centrifugal force which, on the one hand, pushes against the liquid flowing to the mechanical seal, The pressure at the seal. On the other hand to prevent the solid particles in the media into the mechanical seal of the friction pair, to reduce the wear of mechanical seal grinding block to extend its service life.
Vice-impeller in addition to play a sealing effect, but also can play a role in reducing the axial force in the submersible sewage pump in the axial force is mainly caused by the liquid on the impeller on the pressure and the entire rotation of the gravity part of the composition The direction of the two forces is the same, the resultant force is added by two forces. It can be seen that in the case where the performance parameters are exactly the same, the axial force of the submersible sewage pump is larger than that of the horizontal pump, and the balance is more difficult than the vertical pump. So in the submersible sewage pump, the bearing is easy to damage the reason is also a great relationship with the axial force.
And if the auxiliary impeller is installed, the direction of the liquid acting on the auxiliary impeller is opposite to that of the above two forces, which can counteract a part of the axial force and also prolong the bearing life. However, the use of secondary impeller sealing system also has a drawback, that is, in the auxiliary impeller to consume part of the energy, usually around 3%, but as long as the design is reasonable, can this part of the loss to a minimum.
China professional submersible sewage pump manufacturer - Shanghai Weihu pump, Welcome the new and old customers in our company custom wholesale sewage pump
1. Compact structure, small footprint. Diving sewage pump submerged as a result of submerged work, it can be installed directly in the sewage pool, without the need to build a dedicated pump room to install pumps and machines, you can save a lot of land and infrastructure costs.
2. Easy installation and maintenance. Small submersible sewage pump can be free to install, large submersible sewage pump are generally equipped with automatic coupling device can be installed automatically, installation and maintenance is very convenient.
3. Continuous running for a long time. Diving sewage pump due to pump and motor coaxial, shaft short, rotating parts of light weight, so the bearing bear the radial load is relatively small, life is much longer than the average pump.
4. There is no problem such as cavitation damage and irrigation. Especially after the operation of the staff to bring a lot of convenience.
5. Vibration noise is small, the motor temperature is low, no pollution to the environment.
It is precisely because of the above advantages, submersible sewage pump has been more and more people's attention, the use of more and more wide range, from the original simply used to transport water to the present can transport a variety of domestic sewage, industrial wastewater, Site drainage, liquid feed and so on.
In the municipal engineering, industry, hospitals, construction, hotels, water conservancy construction and other industries play a very important role.
But anything is divided into two, for the submersible sewage pump is the most critical issue is the reliability of the problem, because the use of submersible sewage pump is in the liquid; transport medium is a mixture of solid materials containing some of the material; Pump and motor close; pump for the vertical arrangement, the weight of rotating parts and impeller to withstand the same water pressure. These problems make the submersible sewage pump in the seal, the motor carrying capacity, bearing layout and selection requirements are higher than the average sewage pump.
In order to improve the life of submersible sewage pump, most manufacturers at home and abroad are in the pump protection system to find a way, that is, in the pump leakage, overload, over temperature and other failures can be automatic alarm, and automatic shutdown repair. But we believe that in the submersible sewage pump to set the protection system is necessary, it can effectively protect the safe operation of the pump. But this is not the key to the problem, the protection system is only a failure in the pump after a remedy, is a more passive approach. The key issue should be from the fundamental, completely solve the pump in the seal, overload and other aspects of the problem, this is a more proactive approach. For this reason, we have the impeller fluid power sealing technology and pump without overload design technology used in submersible sewage pump, a greater increase in the pump seal reliability and carrying capacity, extending the pump life.
Application of the Impeller Fluid Power Sealing Technology
The so-called secondary impeller hydrodynamic seal means that an open impeller is mounted in the opposite direction to the opposite side of the back of the impeller rear cover. When the pump is in operation, the auxiliary impeller rotates with the pump spindle, and the liquid in the secondary impeller rotates together. The rotating liquid produces an outward centrifugal force which, on the one hand, pushes against the liquid flowing to the mechanical seal, The pressure at the seal. On the other hand to prevent the solid particles in the media into the mechanical seal of the friction pair, to reduce the wear of mechanical seal grinding block to extend its service life.
Vice-impeller in addition to play a sealing effect, but also can play a role in reducing the axial force in the submersible sewage pump in the axial force is mainly caused by the liquid on the impeller on the pressure and the entire rotation of the gravity part of the composition The direction of the two forces is the same, the resultant force is added by two forces. It can be seen that in the case where the performance parameters are exactly the same, the axial force of the submersible sewage pump is larger than that of the horizontal pump, and the balance is more difficult than the vertical pump. So in the submersible sewage pump, the bearing is easy to damage the reason is also a great relationship with the axial force.
And if the auxiliary impeller is installed, the direction of the liquid acting on the auxiliary impeller is opposite to that of the above two forces, which can counteract a part of the axial force and also prolong the bearing life. However, the use of secondary impeller sealing system also has a drawback, that is, in the auxiliary impeller to consume part of the energy, usually around 3%, but as long as the design is reasonable, can this part of the loss to a minimum.
China professional submersible sewage pump manufacturer - Shanghai Weihu pump, Welcome the new and old customers in our company custom wholesale sewage pump
Deep well submersible pump selection
Deep well pump is a water and water pump directly into the water into the work of water lifting equipment, it is suitable for the groundwater from the deep wells can also be used for rivers, reservoirs, drains and other water lifting projects: mainly for farmland irrigation and plateau mountain water, Also available for cities, factories, railways, mines, site for drainage use. However, some users due to improper choice, there is not installed into the water shortage, pumping no water, and even damage to the wells and other issues. So, Shanghai weihu deep well submersible pump manufacturers tell users how to choose deep well pump?
First, according to the well diameter, water quality initial pump type. Different types of pumps on the size of the wellbore diameter have certain requirements, the maximum size of the pump to be smaller than the diameter of 25 ~ 50mm. If the wellbore is skewed, the maximum dimensions of the pump should be smaller. In short, the pump part can not close the well wall to prevent the pump vibration will damage the well.
Second, according to the well of the water, select the flow of the pump. Each eye has an economically optimal effluent, and the flow rate of the pump should be equal to or less than the hour when the well water level drops to half the depth of the well. When the pumping capacity is greater than the well water output, it will cause the machine wall collapse and siltation, affecting the service life of the well; if the pumping capacity is too small, the benefits of the well will not be fully exploited. Therefore, the best way is to pump the pump test to the wells may provide the maximum amount of water for the selected well pump flow basis. Pump flow to the label model or instructions on the number of indicators prevail.
3. According to the depth of the well water level and the loss of the head of the pipeline, it is necessary to determine the head of the well pump, that is, the head of the well pump, which is equal to the vertical distance (net head) of the water level to the water level of the outlet pool plus the loss head. Loss of the head is usually a net head of 6 to 9%, usually 1 ~ 2m. Water pump the bottom of a impeller into the water depth to 1 ~ 1.5m is appropriate. The total length of the downhole section of the pump tubing shall not exceed the maximum length of the well specified in the pump instructions. The following are the same as the "
Fourth, the well water sediment concentration of more than one ten thousandth of the wells, should not be installed using stainless steel deep well pump. Because the well water sediment concentration is too large, such as more than 0.1%, will accelerate the wear of rubber bearings, causing pump vibration, shorten the pump life.
First, according to the well diameter, water quality initial pump type. Different types of pumps on the size of the wellbore diameter have certain requirements, the maximum size of the pump to be smaller than the diameter of 25 ~ 50mm. If the wellbore is skewed, the maximum dimensions of the pump should be smaller. In short, the pump part can not close the well wall to prevent the pump vibration will damage the well.
Second, according to the well of the water, select the flow of the pump. Each eye has an economically optimal effluent, and the flow rate of the pump should be equal to or less than the hour when the well water level drops to half the depth of the well. When the pumping capacity is greater than the well water output, it will cause the machine wall collapse and siltation, affecting the service life of the well; if the pumping capacity is too small, the benefits of the well will not be fully exploited. Therefore, the best way is to pump the pump test to the wells may provide the maximum amount of water for the selected well pump flow basis. Pump flow to the label model or instructions on the number of indicators prevail.
3. According to the depth of the well water level and the loss of the head of the pipeline, it is necessary to determine the head of the well pump, that is, the head of the well pump, which is equal to the vertical distance (net head) of the water level to the water level of the outlet pool plus the loss head. Loss of the head is usually a net head of 6 to 9%, usually 1 ~ 2m. Water pump the bottom of a impeller into the water depth to 1 ~ 1.5m is appropriate. The total length of the downhole section of the pump tubing shall not exceed the maximum length of the well specified in the pump instructions. The following are the same as the "
Fourth, the well water sediment concentration of more than one ten thousandth of the wells, should not be installed using stainless steel deep well pump. Because the well water sediment concentration is too large, such as more than 0.1%, will accelerate the wear of rubber bearings, causing pump vibration, shorten the pump life.
QJ Deep Well Pump Selection and Deep Well Pump Head Calculation
QJ wholesale deep well pump selection notes:
(1) the actual depth of the well H, the hydrostatic level Hi, the water depth H and the borehole diameter.
(2) According to the pumping test, the maximum possible effluent Qmax and the corresponding maximum water level decrease are obtained. The water level drop Sq, or Sq = SmaxQmax, is obtained when the unit flow is obtained.
In the absence of accurate pumping test data, Qmax can be estimated as follows:
Qmax = (2H-Smax) SmaxQ (2H-S) S
Where H - well depth, m;
Q-pumping experiment in the water level is stable, the well in the water, msh;
S corresponds to the water level drop in the Q, ie the distance between the hydrostatic level and the stable water level, m;
Smax-well the maximum water level drop, m, generally H2;
Qmax - the maximum possible amount of water corresponding to Smax, m3h.
QJ deep well pump selection steps:
(1) to determine the model of QJ deep well pump according to the well bore diameter and well depth preliminary selection of deep well pump model. If the borehole diameter is 200mm, only 8JD or SD8 deep well pump can be used to keep enough clearance between the well and the pump.
(2) Seeking water level drop According to the selected model, refer to the product sample, find the rated flow Qe, according to the following formula to find the water level drop.
SM = SqQe (6-40)
Where SM-water drop, m, SM ≤ H2.
(3) to find the depth of the water level according to the following formula to find the corresponding water level
Hd = Hi + SM (6-41)
(4) Calculate the total length of the QJ deep well pump in the well
L = Ha + (1 ~ 2) (6-42) where the total length of the L-water pipe, m.
The L value obtained should not be greater than the maximum length of the wellhead given in the product sample.
(5) the total loss of the head according to the diameter and flow of water pipes, found every 10m long water pipe friction
Loss of h value, then the total loss of water pipes:
△ Hz = 0.1hL (6-43) where the total loss of L-water pipe head, m.
(6) to raise water required head
Hx = Hd + ΔHz (6-44)
Where Hx - QJ deep well pump water to the head of the wellhead required. If the water is taken to a certain height from the ground, then the above formula Hx also added to the ground above a section of pipeline water loss.
(7) to determine the impeller series and pump head based on the Hx, check the product samples to determine the pump impeller series, so that the pump rated head is not less than Hx, that is, He = KHx. Where K is the reserve factor, about 1.1 to 1.2.
(1) the actual depth of the well H, the hydrostatic level Hi, the water depth H and the borehole diameter.
(2) According to the pumping test, the maximum possible effluent Qmax and the corresponding maximum water level decrease are obtained. The water level drop Sq, or Sq = SmaxQmax, is obtained when the unit flow is obtained.
In the absence of accurate pumping test data, Qmax can be estimated as follows:
Qmax = (2H-Smax) SmaxQ (2H-S) S
Where H - well depth, m;
Q-pumping experiment in the water level is stable, the well in the water, msh;
S corresponds to the water level drop in the Q, ie the distance between the hydrostatic level and the stable water level, m;
Smax-well the maximum water level drop, m, generally H2;
Qmax - the maximum possible amount of water corresponding to Smax, m3h.
QJ deep well pump selection steps:
(1) to determine the model of QJ deep well pump according to the well bore diameter and well depth preliminary selection of deep well pump model. If the borehole diameter is 200mm, only 8JD or SD8 deep well pump can be used to keep enough clearance between the well and the pump.
(2) Seeking water level drop According to the selected model, refer to the product sample, find the rated flow Qe, according to the following formula to find the water level drop.
SM = SqQe (6-40)
Where SM-water drop, m, SM ≤ H2.
(3) to find the depth of the water level according to the following formula to find the corresponding water level
Hd = Hi + SM (6-41)
(4) Calculate the total length of the QJ deep well pump in the well
L = Ha + (1 ~ 2) (6-42) where the total length of the L-water pipe, m.
The L value obtained should not be greater than the maximum length of the wellhead given in the product sample.
(5) the total loss of the head according to the diameter and flow of water pipes, found every 10m long water pipe friction
Loss of h value, then the total loss of water pipes:
△ Hz = 0.1hL (6-43) where the total loss of L-water pipe head, m.
(6) to raise water required head
Hx = Hd + ΔHz (6-44)
Where Hx - QJ deep well pump water to the head of the wellhead required. If the water is taken to a certain height from the ground, then the above formula Hx also added to the ground above a section of pipeline water loss.
(7) to determine the impeller series and pump head based on the Hx, check the product samples to determine the pump impeller series, so that the pump rated head is not less than Hx, that is, He = KHx. Where K is the reserve factor, about 1.1 to 1.2.
Correctly select submersible pump model
First, the use of submersible pump performance specifications table pump type
Water pump factory in the product catalog are provided in this form, the table of each model has three rows of data performance, which line is it? The general design flow and the design head should be consistent with the values in the middle row of the performance table, or are close to each other, and must fall within the upper and lower rows because the range is the high efficiency area of the pump operation, This model of the pump that is in line with the actual needs of the pump was selected.
China professional submersible sewage pump manufacturer - Shanghai Weihu pump, welcomed the new and old customers in our company custom wholesale submersible pumps
Second, the use of submersible pump selection table pump type
According to the design of the design of the head and the design flow, in the selection table, the horizontal head to find out with the design of the head or close to the head of the value; and then in the vertical head to find the design flow is consistent or close to the flow value , Vertical and horizontal intersect in the small box, which marked the pump model, the initial selection of multi-stage pump. But sometimes there are two types of pumps are to meet the design requirements, this time, the two pumps can be compared for the program, the technical and economic analysis, and then select one of the appropriate pump. This method of selecting the pump is relatively simple and fast.
Third, the use of submersible pump performance integrated spectrum pump selection
The working area of centrifugal pump, axial flow pump, chemical pump and mixed flow pump is fully drawn on the same picture, which constitutes the comprehensive spectrum of agricultural water pump series. The drawing is complicated, but it is more convenient to use. Design flow and design of the head, in the spectrum, the first in the ordinate to the design of the head to find out in line with the requirements of the head, and the flow of several pumps, and then in the abscissa to design flow to determine which kind of choice Water pump. If the design flow is large, single pump failed to meet the requirements, may consider multi-machine operation, but should pay attention to try to use the same type of pump, in order to facilitate the construction installation, management and maintenance.
Water pump factory in the product catalog are provided in this form, the table of each model has three rows of data performance, which line is it? The general design flow and the design head should be consistent with the values in the middle row of the performance table, or are close to each other, and must fall within the upper and lower rows because the range is the high efficiency area of the pump operation, This model of the pump that is in line with the actual needs of the pump was selected.
China professional submersible sewage pump manufacturer - Shanghai Weihu pump, welcomed the new and old customers in our company custom wholesale submersible pumps
Second, the use of submersible pump selection table pump type
According to the design of the design of the head and the design flow, in the selection table, the horizontal head to find out with the design of the head or close to the head of the value; and then in the vertical head to find the design flow is consistent or close to the flow value , Vertical and horizontal intersect in the small box, which marked the pump model, the initial selection of multi-stage pump. But sometimes there are two types of pumps are to meet the design requirements, this time, the two pumps can be compared for the program, the technical and economic analysis, and then select one of the appropriate pump. This method of selecting the pump is relatively simple and fast.
Third, the use of submersible pump performance integrated spectrum pump selection
The working area of centrifugal pump, axial flow pump, chemical pump and mixed flow pump is fully drawn on the same picture, which constitutes the comprehensive spectrum of agricultural water pump series. The drawing is complicated, but it is more convenient to use. Design flow and design of the head, in the spectrum, the first in the ordinate to the design of the head to find out in line with the requirements of the head, and the flow of several pumps, and then in the abscissa to design flow to determine which kind of choice Water pump. If the design flow is large, single pump failed to meet the requirements, may consider multi-machine operation, but should pay attention to try to use the same type of pump, in order to facilitate the construction installation, management and maintenance.
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