The QJ deep well pump is a water lifting equipment that is directly connected to a motor and a water pump and operates underwater. It is suitable for extracting groundwater from deep wells and can also be used in water lifting projects such as rivers, reservoirs, and canals. It is mainly used for irrigation of farmland and water supply for humans and animals in high-altitude mountainous areas

Can be used for water supply and drainage in cities, factories, railways, mines, and construction sites.

2、 Characteristics of QJ deep well pump

1. The motor and water pump are integrated and operate underwater, ensuring safety and reliability.

2. There are no special requirements for well pipes and lifting pipes (i.e. steel pipe wells, ash pipe wells, soil wells, etc. can all be used; under pressure permission, steel pipes, rubber hoses, plastic pipes, etc. can all be used as lifting pipes)

3. Easy to install, use, and maintain, with a small footprint and no need to build a pump room.

4. Simple structure, saving raw materials. The suitability of the operating conditions and proper management of submersible electric pumps are directly related to their service life.

3、 Usage conditions of QJ deep well pump

1. A three-phase AC power supply with a rated frequency of 50Hz and a rated voltage of 380+5% volts.

2. The inlet of the water pump must be below 1 meter of the dynamic water level, but the diving depth must not exceed 70 meters below the static water level. The distance between the lower end of the motor and the bottom of the well should be at least 1 meter.

3. The water temperature should generally not exceed 20OC.

4. Water quality requirements: (1) The sand content in the water should not exceed 0.01% (by weight);

(2) The pH value is in the range of 6.5~8.5;

(3) Chloride ion content not exceeding 400 milligrams per liter

5. Require the well to be upright and the wall to be smooth.

4、 Structural description

1. The QJ deep well pump consists of four main parts: water pump, submersible motor (including cables), water delivery pipe, and control switch. The submersible pump is a single suction multi-stage vertical centrifugal pump: the submersible motor is a closed water filled wet type, vertical three-phase cage asynchronous motor, and the motor is connected to the water pump

Directly connect through claw or single barrel couplings; Equipped with three core cables of different specifications; The starting equipment consists of air switches of different capacity levels and self coupling pressure reducing starters. The water supply pipes are made of steel pipes of different diameters and connected by flanges. The high lift electric pump is used

Control with gate valve.

2. Each stage of the submersible pump is equipped with a rubber bearing in the guide housing; The impeller is fixed on the pump shaft with a conical sleeve; The guide shell is connected by threads or bolts as a whole.

3. The upper part of the high lift submersible pump is equipped with a check valve to prevent damage to the unit caused by water drop during shutdown.

4. The upper part of the submersible motor shaft is equipped with a labyrinth sand inhibitor and two reverse assembled skeleton oil seals to prevent sand from entering the motor.

5. The submersible motor adopts water lubricated bearings and is equipped with rubber pressure regulating film and pressure regulating spring at the lower part, forming a pressure regulating chamber to regulate pressure changes caused by temperature; The motor winding adopts polyethylene insulation, nylon sheath, durable consumer goods, water, electricity, magnetic wire, and cable connection method

According to the QJ cable joint process, remove the insulation and scrape off the paint layer of the joint, connect them separately, weld them firmly, and wrap them with a layer of raw rubber. Wrap 2-3 layers of waterproof adhesive tape, then wrap 2-3 layers of waterproof tape on the outside or use water glue to bond and wrap a layer of rubber tape (bicycle)

To prevent water seepage.

6. The motor is sealed with precision stop bolts, and the cable outlet is sealed with rubber pads.

7. There is a water injection hole and a discharge hole at the upper end of the motor, and a discharge hole at the lower part.

8. The lower part of the motor is equipped with upper and lower thrust bearings, which have grooves for cooling and are paired with stainless steel thrust discs for grinding, following the axial force of the water pump.