Overview of deep well submersible pumps

QJ deep well submersible pump composition. It is suitable for extracting groundwater from deep wells. It is widely used in cities, working enterprises, cooling systems, water supply and drainage and agricultural irrigation and drainage. Its main features are motor, pump as one integrated into the water work, do not need pump building, its simple structure, use, easy maintenance, high efficiency, safe and reliable operation.
Deep well submersible pump safety precautions
1. Before installing and using the product, please read the instruction manual carefully
2. Before installing and servicing the submersible pump, the power must be switched off.
3. Do not wet hands, wet feet push and pull the gate, press the button.
4. In the ditch, drainage, river, pond, pool installation use, the submersible pump must be reliable grounding.
5. Submersible pump must be equipped with overload protection device to prevent short circuit, electric shock, fire.
6. Submersible pump use site to set the "to prevent electric shock" obvious signs.
7. Before installation, submersible pump cavity must be filled with water.
8. Periodically check the insulation resistance of the motor windings to ground.
9. Submersible pump can not be lying, can only be used vertically.
Deep well submersible pump use conditions
1. Power supply: three-phase alternating current 380V (allow ± 5%), 50Hz (allow ± 1%).
2. Water quality: (1) water temperature is not higher than 20 ℃;
(2) the content of solid impurities (mass ratio) is not more than 0.01%;
(3) PH value (pH) 6.5-8.5;
(4) hydrogen sulfide content of not more than 1.5mg / L
(5) chloride content of not more than 400mg / L.
3. Submersible motor cavity must be filled with clean water.
4. Submersible pump must be completely submerged in the water work, the depth of sneak of not more than 70mm, submersible pump bottom from the bottom of the rain is not rain 3m.
5. The amount of water poured into the wells should be able to meet the submersible pump out of the water and continuous operation, submersible pump water should be controlled at the rated flow of 0.7-1.2 times.
6. Well should be straight, submersible pump can not be lying, can only be used vertically.
7. Submersible pump must be required to match the provisions of the cable, and with the overload protection device.
Deep well submersible pump model significance
175QJ50-60
175 - means the minimum diameter (mm)
QJ - well submersible pump
50 - flow (m3 / h)
60 - means head (m)
YQS200-25
Y - expressed as an asynchronous motor
Q - said diving
S - that wet
200 - means the minimum diameter (mm)
25 - Rated motor power (KW)
Deep well submersible pump selection prerequisite
First, the deep well understanding:
For the rational selection and use of submersible pumps, the following items should be understood.
1. Requirements in the use conditions.
2. Deep well pipe diameter and depth.
3. Deep water level and moving water level.
4. The best water in the deep well.
Second, the submersible pump seat (to adapt to the minimum diameter) should be less than or equal to the depth of the deep well.
Third, the submersible pump flow should be appropriate, can not exceed the best gushing water, or will cause the aquifer sand movement, causing wells out of the sand, resulting in damage to the submersible pump.
Fourth, the submarine pump required head can be calculated according to the formula
Maintenance and Maintenance of Deep Well Submersible Pump
1. After installation of the submersible pump, check the insulation resistance and the three-phase conduction from the switch. Check the instrument and start the device for any errors. If there is no problem, start the test machine and watch the instrument Whether the reading exceeds the rated voltage and current specified in the nameplate, observe whether the pump has no noise and vibration, and everything can be put into operation.
2. After the first operation of the pump for four hours, the motor should be shut down quickly test the thermal insulation resistance, the value should not be less than 0.5 megohms.
3. After the pump stops, should be separated after five minutes to start, to prevent the water column has not yet fully reflux caused by motor current is too large and burned.
4. After the normal operation of the pump, in order to extend its service life, to regularly check the power supply voltage, operating current and insulation resistance is normal, if found the following circumstances should immediately stop troubleshooting.
A. Under rated operating conditions, the current exceeds 20%
B. Moving water level down to the water section, resulting in intermittent water
C. Submersible pump violent vibration or noise
D. The supply voltage is below 340V
E. Fuse burns a phase
F. Damaged water pipes
G. Motor insulation resistance to ground heat below 0.5 megohm.
5. Unit disassembly
A. And the amount of cable to open the cable, remove the pipeline part, remove the line version
B. Remove the drain bolts and drain the motor chamber
C. Remove the filter and loosen the fixing screws that secure the motor shaft on the coupling.
D. Unscrew the bolts that are connected to the motor at the inlet and separate the pump from the motor (note that the unit is padded to prevent the pump shaft from bending)
E. Pump disassembly order is: water section, impeller, guide shell, impeller ---- check valve body, remove the impeller with a special tool first fixed impeller tapered sleeve release, remove the process to avoid the pump Shaft bending and pieces of bruises.