2016年11月30日星期三
2016年11月29日星期二
Drainage pump common faults and solutions
Drainage pump common faults and solutionsEmail：fay@welpump.com
Drainage pump common faults and solutions
Drainage pump common faults and solutionsEmail：fay@welpump.com
2016年11月27日星期日
Working Principle of Automatic Mixed Submersible Sewage Pump
Automatic Mixed Submersible Sewage Pump is a special water diversion device, which is designed on the basis of common submersible sewage pump. The automatic mixing and submerging sewage pump has been widely used in many fields because of its own characteristics.
According to the relevant experts of the fountain pump, the automatic mixing and diving sewage pump utilizes the pressure water in the pump cavity. With the high speed rotation of the motor, the bottom of the sewage tank (sump) is washed with the swirling speed of 10 ~ 20m / , Will stir up the precipitate with the water after the discharge, to prevent the sewage pool (water puddle) sediment accumulation of solidification.
As with the fountain pumps, automatic mixing and submerged sewage pump has been widely used in many fields. Automatic mixing and submerged sewage pump is suitable for kitchen oil, grease and waste water containing sewage, the amount of sediments containing more underground garage, such as sediment more, longer residence time, sewage pumping up emissions.
If in the past the design institute in the submersible sewage pump discharge pipe connected to a DN25 short pipe connection cut-off valve and rubber hose used for washing the sewage tank of the customary practices compared to this automatic mixing uniform submersible sewage pump with automatic mixing, Often washed, without someone to operate to ensure that the accumulation of non-piled sediment pool, and many other advantages.
Automatic mixing of submersible sewage pump with its own advantages, many applications, simple mode of operation, by the merchants and consumers in hot pursuit, and the fountain pump, is the business and consumer consistent choice.
Choose the right pump, not the one that looks good
There are many kinds of sewage pumps, such as centrifugal impurity pump, horizontal centrifugal sewage pump, acid resistant sewage pump, submersible sewage pump, submerged pump, etc. Submersible sewage pump and submerged pump work under fluids. They don’t need priming water before start, generating little noise and vibration. Its structure is simple, taking little floor space. It should be your first choice. Sewage water contains many impurities, so we cannot install a bottom valve to the sewage pump and pour water into it. Instead, we had better make the axle line of the pump immersed under the water surface in pool, and let water flow into the sewage pump by itself. Otherwise, we have to add air extraction equipment, for example, a vacuum pump. Acid-resistant sewage pump is suitable to pump acidic or alkali waste water or other corrosive sewage.
A standby pumping unit should be prepared for sewage pump. Each pump should have a separate pipe to draw in water, so that each of them can work independently. In order to drain the sewage timely and to reduce the volume of the water collection pool, the sewage pump had better be started automatically.
When choosing a sewage pump, you had better take the following aspects into consideration:
1. The property of waste water, such as the content of impurities, how corrosive it is, its temperature and other possible damages it may cause.
2. The quantity of waste water and whether it is drained continuously.
3. How high it should be lifted? The water quantity and pressure needed for lifting.
Shanghai Weihu submersible sewage pump manufacturers offers the most complete knowledge about sewage pump selection. Welcome to click Weihu Pump to know more about us.
Submersible sewage pumps structure and application
1. Submersible sewage pump application
Submersible sewage pump is also called submersible drainage pump or submersible slurry motor-pump. The sewage pump Weihu produces is mainly used in municipal projects, hospitals, constructions, hotels and restaurants, etc. It works to transport waste water containing solid particles and all kinds of long fibers, municipal domestic wastewater and rainwater, as well as raw water and water for aquaculture and irrigation, etc. When made from some special material, it can also be used to transport corrosive fluids. Fluids temperature shall be less than 40℃, PH value 4~10, fluids density ratio theoretically less than 1.1. It adopts three-phase 380V, 50Hz power source. It shall not be immersed deeper than 10m under water. The water level can be controlled automatically to the need of the clients.
2. Submersible sewage pump structure
2.1 The submersible motor adopts the stator and rotor of common Y type, Y2 type motors to reduce cost and enlarge production scale, so that it can be produced in batches. Meanwhile, it brings great convenience to customers in model selection, matching and maintenance.
2.2 Submersible sewage pump uses impellers of different structure in different occasions for different purposes. It may choose specially designed single channel or double channel impellers, or closed type double blades impellers, all of which perform well in anti-winding and anti-clogging, have high efficiency, save energy and can make fluids pass through easily. You may also choose automatic mixing submersible sewage pump that can mix the fluids evenly.
2.3 It uses single case spiral chamber, draws water in from bottom and discharges from sideway. It has a large channel for fluids to flow through.
2.4 To make sure the pump work with the highest efficiency, a wear resistant sealing ring is installed between the impellers and the spiral chamber. This ring can be changed.
2.5 Pumps of high lift have back-blade sealing on its impellers to reduce the pressure imposed on pump chamber by the fluids, so as to balance the axial force and prevent impurities from entering the sealed chamber, prolong the service life of the sealing.
Sewage pump features
1. A double-end mechanical sealing is installed between the motor and the head of pump. For submersible sewage pump with high power, such as big flow ones, we can install two single end mechanical sealing in series. Sealing material includes tungsten carbide, silicon carbide, tungsten carbide vice, super wear-resistant sealing, graphite, etc.
2. Submersible sewage pump with power over 15KW has a cooling system inside. The back blade of impeller makes water in spiral chamber flow around the stator chamber for recycle and cooling, so that the pump can work normally when the water in the pool drops to the lowest level or when the pool is drained. The wiring chamber has an oil-water probe. If the main cable or control cable breaks, or water leakages happen, the probe will send out a signal to the control system to protect the pump.
3. The mechanical sealing can be cooled and lubricated in oil chamber. The oil chamber also separates motor chamber from the pump part. It has electrode protection device, i. e. oil-water probe. The electrode sends out a signal when the fluids being pumped enter the oil chamber. That will be displayed on control system, indicating the supervisor to maintain it timely. At the same time, the control system will closely supervise the pump for leakage.
4. A water leakage detector or float switch is installed at the bottom of the motor chamber. When the fluids being pumped enter the motor chamber, the switch will send out a signal to the control system for it to protect the pump.
5. Motor stator insulation class is F. It has over-heating protection device inside. Another over-heating protection device is installed at the installation part of the bearing. The protection devices can prevent the motor from over-heating and over-load, and protect the bearing from over-heating, etc.
6. Submersible sewage pumps also have other protection device, such as over load protection device, default phase protection device, leakage protection device, over temperature protection device, etc.
Weihu submersible sewage pump manufacturers provides all kinds of submersible sewage pumps. Welcome to contact us for more information.
2. Submersible sewage pump with power over 15KW has a cooling system inside. The back blade of impeller makes water in spiral chamber flow around the stator chamber for recycle and cooling, so that the pump can work normally when the water in the pool drops to the lowest level or when the pool is drained. The wiring chamber has an oil-water probe. If the main cable or control cable breaks, or water leakages happen, the probe will send out a signal to the control system to protect the pump.
3. The mechanical sealing can be cooled and lubricated in oil chamber. The oil chamber also separates motor chamber from the pump part. It has electrode protection device, i. e. oil-water probe. The electrode sends out a signal when the fluids being pumped enter the oil chamber. That will be displayed on control system, indicating the supervisor to maintain it timely. At the same time, the control system will closely supervise the pump for leakage.
4. A water leakage detector or float switch is installed at the bottom of the motor chamber. When the fluids being pumped enter the motor chamber, the switch will send out a signal to the control system for it to protect the pump.
5. Motor stator insulation class is F. It has over-heating protection device inside. Another over-heating protection device is installed at the installation part of the bearing. The protection devices can prevent the motor from over-heating and over-load, and protect the bearing from over-heating, etc.
6. Submersible sewage pumps also have other protection device, such as over load protection device, default phase protection device, leakage protection device, over temperature protection device, etc.
Weihu submersible sewage pump manufacturers provides all kinds of submersible sewage pumps. Welcome to contact us for more information.
S type stainless steel sewage pump models and parameters
Weihu sewage pump manufacturers has been dedicated to producing all kinds of sewage pumps and clear water pumps for thirty years. S type stainless steel sewage pump is one of the most popular water pumps in markets. Our S type stainless steel sewage pump of all models has been exported to 58 countries and districts successively. A number of nuclear stations are also using Weihu Pump’s S type stainless steel sewage pumps. Years of research, development and production experiences endow the following advantages to Weihu’s S type stainless steel sewage pumps of all models.
1. Molten pump case
The molten case of the pump is surely thicker than stamped or strengthened stainless steel case. Its wear resistant performance is further enhanced, so that it can be used for a long time in corrosive fluids.
2. Half-open impellers made from stainless steel
Impellers are made from stainless steel, resist acid and alkali. They are half open type, with non-clogging design. They will not be clogged even if there is solid particles, long fibers, waste and old goods in water.
3. Anti-corrosive cable, cable protected from power leakage
It adopts high quality cable, which is anti-corrosive and protected from power leakage. Power or water leakage will not occur even when the cable is broken. It will not be corroded easily and leaks water or electricity. It is both convenient and safe.
4. High quality anti-corrosive sealing
It adopts new mechanical sealing that has acquired national patent, which has excellent performance, and will never wear the main shaft. Meanwhile, fluorine rubber is also used in the sealing to greatly improve its anti-corrosive performance.
5. Anti-corrosive O shaped ring
These small accessories may seem trivial, but their quality should always be strictly required. The series of products produced by our company all uses anti-corrosive O shaped ring, making sure that it is suitable for corrosive fluids. Weihu S type stainless steel sewage pumps have many advantages. Every model of our S type sewage pumps has been sold at home and abroad, wining positive comments from many clients. If you are interested in our Weihu S type stainless steel sewage pump, please check the following parameter table firstly, and contact us for more details.
Weihu WQB series black non-clog submersible sewage pumps models and parameters
Weihu WQ non-clogging sewage pumps has many models, all with high efficiency, saving energy, protected from winding and clogging, and other features. They are especially effective in discharging fluids containing short fibers, paper scraps, sands or other solid particles, such as muddy water, domestic waste water or other fluids. Weihu WQ series non-clog submersible sewage pumps have small figure, but large application range. They are widely used in discharging domestic waste water or sewage in public facilities, in sewage discharge system of municipal projects, mines, factories and enterprises, in draining flooded fields in emergency, or in delivering and discharging other non-corrosive fluids of little viscosity. Besides, this series of Weihu non-clog sewage pumps are also widely used in agricultural fields, such as biogas digester in rural areas, farmland irrigation, water supply and discharge device of tap water factories, etc. Weihu WQ type non-clogging submersible sewage pumps are cheap but with high quality accessories. The whole machine adopts high strength cables, with national CCC certificate, having higher efficiency, saving more energy and safer. It will not leak electricity even when broken. It adopts highly precise shaft bearing fabricated with extra care, making the non-clog submersible sewage pump works more reliably and prolonging the service life of its motor. Its outlet flange is made of cast iron, convenient to be connected with pipes. All pumps of this series are loaded with overheat protector. When the motor is overheated, the protector can cut off power source automatically, causing tripping operation to protect the motor. The adoption of high quality seal ring adds to the sealing performance of the whole machine.
Weihu WQ type non-clogging sewage pump models and parameters
Model
|
Flow quantity（m3/h）
|
Lift（m）
|
Power（kw）
|
Rotation（r/min）
|
WQ7-15-1.1
|
7
|
15
|
1.1
|
2900
|
WQ7-7-1.1
|
15
|
7
|
1.1
|
2900
|
WQ10-15-1.5
|
10
|
15
|
1.5
|
2900
|
WQ25-7-1.5
|
25
|
7
|
1.5
|
2900
|
WQ10-22-2.2
|
10
|
22
|
2.2
|
2900
|
WQ25-10-2.2
|
25
|
10
|
2.2
|
2900
|
WQ35-7-2.2
|
35
|
7
|
2.2
|
2900
|
WQ50-6-2.2
|
50
|
6
|
2.2
|
2900
|
WQ15-25-3
|
15
|
25
|
3
|
2900
|
WQ25-20-3
|
25
|
20
|
3
|
2900
|
WQ50-10-3
|
50
|
10
|
3
|
2900
|
WQ60-9-3
|
60
|
9
|
3
|
2900
|
WQ15-32-4
|
15
|
32
|
4
|
2900
|
WQ25-25-4
|
25
|
25
|
4
|
2900
|
WQ50-13-4
|
50
|
13
|
4
|
2900
|
WQ60-10-4
|
60
|
10
|
4
|
2900
|
WQ18-40-5.5
|
18
|
40
|
5.5
|
2900
|
WQ30-30-5.5
|
30
|
30
|
5.5
|
2900
|
WQ40-22-7.5
|
40
|
22
|
5.5
|
2900
|
WQ65-15-5.5
|
65
|
15
|
5.5
|
2900
|
WQ45-22-7.5
|
45
|
22
|
7.5
|
2900
|
WQ100-10-7.5
|
100
|
10
|
7.5
|
2900
|
WQ140-7-7.5
|
140
|
7
|
7.5
|
2900
|
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