Deep well pump operation, repair and storage

Deep well pump operation, repair and storage

1. Submersible well pump operation should always observe the current, voltmeter and water flow, and strive to run the pump under rated conditions.
2. Application of the valve to adjust the flow, head, not overload operation. One of the following should be stopped immediately:
(1) rated current when the current exceeds the rated current of 20%;
(2) When the supply voltage is too high or too low (higher than 400V or below 360V);
(3) rated head, the flow rate is lower than normal;
(4) Insulation resistance less than 0.5 megohms;
(5) when the moving water level drops to the pump inlet;
(6) electrical equipment and circuits are not required;
(7) the pump has a sudden sound or a large vibration;
(8) When the protection switch is frequently tripped.
3. To constantly observe the instrument, check the electrical equipment every half a month to measure the motor insulation resistance, the resistance value of not less than 0.5 megohms.
4. Each row of irrigation (2500 hours) for a maintenance protection, replacement of damaged parts.
5. Lifting and handling of electric pump:
(1) disconnect the power, remove the cable wiring;
(2) With the installation tool to gradually remove the water pipes, gate valves, elbow, and with the splint to lift the pump out of the manhole cover, and another clamp to clamp the next section of the water pipe, so in turn, block off until the pump out of the well The (In the process of hanging and found that there can not be forced to lift the card, should be up and down activities to overcome the card point of safe lifting);
(3) Remove the gusset plate and filter the net and cut the cable from the lead and the three-core cable or the flat cable connector;
(4) Remove the coupling lock ring, remove the fixing screw, remove the connecting bolts, make the motor, water pump separation;
(5) release the motor filled with water;
(6) the demolition of the pump:
Remove the impeller, tapered sleeve, remove the guide shell, so that the unloading of the impeller, deflector, and so on, Upper guide shell, check valve and so on.
(7) Motor removal:
Remove the base, thrust bearing, thrust plate, lower guide bearing, connecting seat, throwing sand, remove the rotor, remove the upper bearing seat, stator and so on.
6. Assembly of the pump:
Before assembly check the cleaning of the parts of the rust, sludge, with the surface to be coated with butter rust, water pump large thread joints to apply lead oil.
(1) Assembly order of motor:
Stator assembly → lower bearing assembly → rotor assembly → thrust plate → shaft nut → thrust bearing assembly → base assembly → upper bearing bearing assembly → skeleton oil seal → connecting seat. Adjust the studs so that the motor shafts meet the specified requirements. And then on a good pressure regulating film, pressure spring and cover.
(2) Water pump assembly:
The shaft and the water section fixed in the mounting seat, with the cartridge will be impeller, conical sleeve fixed on the shaft, and then install the guide shell, the impeller ... ... in this way Bahrain up the shell, check valves and so on.
Class 8 below the motor pump part of the assembly, the first in the water and the upper bearing bearing contact plane evenly distributed, add the same 3 ~ 3.5 mm gasket 3 to 4, and then even on the good pull nut, Shaft, the pump shaft, the upper fixed bolts and the lock ring, with the cartridge to the impeller, cone sleeve fixed on the pump shaft, and then installed on the guide shell, the impeller ... ... in this way, After the pump is installed, release the ribs, remove the gasket, and then tighten the ribs, and then turn the pump from the coupling, the rotation must be uniform.
7. Save the deep well water pump
When the pump is not used for a long time, it should promptly release the water inside the motor, wipe the surface clean, coated with anti-rust oil, on the relatively clean, dry, no chemical corrosion place. After the motor cavity is filled with water, it is strictly prohibited to put the temperature in the environment of 0 ℃ and below, otherwise it must be put in the cavity clean water to prevent cracking motor. Deep well submersible pumps