The submersible electric pump unit is composed of four parts: water pump, submersible motor (including cable), water pipe and control switch. The submersible pump is a single-suction multistage vertical centrifugal pump; the submersible motor is a closed water-filled wet, vertical three-phase squirrel cage asynchronous motor, and the motor and the pump are directly connected by a claw or single key barrel coupling; equipped with different specifications Three-core cable; starting equipment is air switch with different capacity levels and self-coupling decompression pneumatics, water pipe is made of steel pipes with different diameters, connected by flange, high-lift electric pump is controlled by gate valve.

The upper part of the submersible motor shaft is equipped with a labyrinth sand control device and two back-mounted skeleton oil seals to prevent quick sand from entering the motor. The submersible motor uses water-lubricated bearings, and the lower part is equipped with a rubber pressure-regulating film and a pressure-regulating spring to form a pressure-regulating chamber to regulate the pressure change caused by temperature; the motor winding is insulated with polyethylene, nylon household water-resistant electromagnetic wire, and the cable connection method is as follows In the cable joint process, the joint insulation is stripped of the paint layer, and the joints are connected separately, and the welding is firm, and the raw rubber is used to wrap one layer. Then wrap 2-3 layers with waterproof adhesive tape, and wrap 2-3 layers of waterproof tape or a layer of rubber (bicycle inner tube) with water glue to prevent water leakage.

A rubber bearing is installed in the diversion casing of each stage of the submersible pump; the impeller is fixed on the pump shaft with a vertebral sleeve; the diversion casing is integrated with threads or bolts. The high-lift submersible pump is equipped with a check valve at the upper part to avoid the damage caused by the shutdown water hammer. The electric secret is closed, using precision stop bolts, and the cable outlet is sealed with a rubber pad. The motor has a water injection hole on the upper end, a vent hole, and a water drain hole on the lower part. The lower part of the motor is equipped with upper and lower thrust bearings. The thrust bearing has grooves for cooling, and it wears a stainless steel thrust disk that withstands the vertical axial force of the pump.