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ChinaDaily maintenance of submersible pumps. Check the power cord for damage every day. It is absolutely forbidden to launch the leaking submersible pump into the water. Check the pump body for damage every day to ensure that the motor does not leak electricity when it is working. After the operation is over, the debris attached to the water pump should be cleaned up in time, and the water pump should be rinsed clean. In order to ensure the normal operation of the submersible pump, it must be carried out in accordance with the following requirements. Before using the submersible electric pump, check the insulation resistance of the motor with a megohmmeter, and the minimum value should not be less than 50MΩ.
The water immersion motor should open the water filling screw plug and fill it with clean water before tightening the screw plug. Do not unscrew the water filling screw plug and go directly into the well. Check whether the cable is broken or broken before use. If damaged, it should be replaced in time to prevent leakage. The submersible electric pump should be filled with clean water before launching, and then idling for 1-2 minutes, and start twice, check if the starting and idling are normal, and whether the steering meets the requirements. If the direction of rotation is reversed, just replace any two-phase wiring. Check whether the water lift pipe is cracked and whether the connection is firm. When the submersible electric pump is going down and hoisted, it is never allowed to pull the cable so as to avoid damage to the cable or disconnection of the joints, which may cause undesirable accidents. Iron wires or pallets should be used to go down the well and lift.
The power supply voltage should be controlled within ±5% of the rated voltage so that the motor can work normally. If the voltage is too low or too high, the motor cannot be used continuously, so as to avoid damage to the motor when it works under over-voltage or under-voltage for a long time. When submersible pumps are submerged in the water, they should be suspended vertically, not diagonally. The water entry depth should be 5 meters below the dynamic water level. Submersible electric pumps must not deliver water or mud with high sand content. The actual head of the submersible electric pump should be used within 0.8-1.1 times the rated head to improve the efficiency of the unit, save energy, and avoid overloading the motor.
The wiring of the submersible pump motor must be connected firmly to prevent the motor from being burnt due to lack of phase operation. The cable must be checked frequently for cracks, scratches, etc., and if it is, replace or repair it in time. If oil leakage occurs in the oil-immersed motor, it should be repaired in time to the manufacturer or maintenance point, and the sealing element should be replaced. The water immersion motor should always clean the sand particles in the motor cavity and replace the clean water in the motor cavity. After half a year of operation, the submersible electric pump should be repaired and inspected, and the damaged parts should be replaced. After the submersible electric pump is used, the water immersion motor should be drained of clean water in the motor, the electric pump should be cleaned, oiled to prevent rust, and stored vertically in a dry place.
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