QRJ type submersible pump for wells-Global supplier

No. 192, Bianzhong East Road, Chengqiao Street, Liuhe District, Nanjing City, Jiangsu Province, China

1、 Introduction to QRJ type submersible pump for wells

The QRJ type submersible pump for wells is a product that incorporates advanced hydraulic models and new structural designs from abroad. It adopts multiple advanced processes and is manufactured in full accordance with the standards of the American Hydraulic Association, reaching the international advanced level. The entire series of submersible pumps for wells are energy-saving products.

2、 Characteristics of QRJ type submersible pump for wells

1. Advanced hydraulic models and structural designs are selected, and various new processes such as Ashland process for core making, coating of blade flow channels, flame straightening of blade axles, and CNC machining of various parts are adopted. The material selection is reasonable, the product performance is excellent, and the service life is long.

2. High efficiency, 2-8% higher than domestic QJ series water pumps, with a flat efficiency curve and a wide high-efficiency area. The working range is increased by 10-20%, and the energy-saving effect of the product is significant.

3. For wells with high sand content, sand control structures and devices can be used.

4. The radial runout of the impeller shaft is controlled within 0.13mm of the American standard and supported by copper bearings, ensuring smooth operation of the water pump.

5. Specially designed waterproof rubber sheathed cable.

6. Can be equipped with advanced high axial force and temperature resistant stainless steel submersible motors from abroad.

3、 Performance Range of QRJ Submersible Pump for Wells

Q≤2200m3/h，H≤420m， Pump clean water or liquids with physical and chemical properties similar to water, with neutral water quality, PH=6.5～8.5， Chloride ion content ≤ 400mg/L, medium temperature ≤ 75 ℃.

4、 QRJ type submersible pump structure for wells

1. Drainage pipe: Suitable size to ensure good flow rate. Material: Q235-A steel pipe.

2. Water outlet shell: There are two types of connections: threaded and flanged. Material: HT200

3. Upper shell bearing: Copper bearing.

4. Mid shell: Smooth flow channel reduces frictional resistance and improves efficiency. The material is HT200.

5. Impeller: Designed in conjunction with the middle shell, it is efficient, has a wide operating range, and undergoes precise balancing to ensure smooth operation. Material: HT200 or silicon brass.

6. Upward washer: prevents the rotor from moving upwards. Material: ZCUZN16SI4.

7. Medium shell bearings: Copper bearings or wear-resistant rubber bearings. Reliable work and long lifespan.

8. Cone sleeve: securely fix the impeller onto the impeller shaft. The material is 35 # carbon steel.

9. Wheel shaft: 2CR13 stainless steel or 45 # high-quality steel (surface chrome plated).

10. Water filter: Ensure smooth water flow and prevent large particles from entering.

11. Motor connector: A well-designed window ensures easy installation and disassembly of the coupling. The material is HT250.

12. Pump/motor coupling: transmission power. The material is 45 # carbon steel.

5、 Precautions for using QRJ submersible pump for wells

1. Check if the seals of the pump's vent holes, drain holes, oil drain holes, and cable joints are loose. If they are loose, they must be tightened.

2. Use a 500 volt shaker to check the insulation resistance, which should not be less than 0.5 megohms. If it is lower than this value, open the drain and vent holes and dry or sun dry them.

3. Check the cable and replace it if it is broken or broken to prevent electrical leakage.

4. Before starting, check all circuits and switches to see if their wiring is correct and secure. Then, turn them on the ground for 3-5 minutes (the time should not be too long to avoid damaging parts or burning out the motor winding), and check if the direction of motor rotation is correct. If there are no problems with the above, they can be put into water for use.

5. When using a submersible electric pump in water, the cable must not be subjected to force. It should be tied to the wooden frame at the wellhead with ropes. The maximum depth for placing the electric pump into the water is 3 meters, and the minimum depth is 0.5 meters (calculated from the center of the impeller).

6. During operation, it is necessary to regularly observe the changes in water level in the well. The motor must not be exposed to the water surface or trapped in mud, in order to avoid affecting the heat dissipation of the motor and burning out the winding.

The electric pump should be raised and lowered at any time according to the changes in water level in the well. If there is a decrease or interruption in water volume, the cause should be immediately identified or the machine should be stopped for inspection. The cable should not rub against the wellbore to prevent the well water from seeping into the motor along the cable core after the cable is worn out.

7. After using the submersible pump with a new or replaced integral sealing box for 50 hours, the sealing should be checked for good condition, and then checked once a month. At the same time, the sealing of the shielding sleeve between the motor rotor and stator should be checked for good condition.

8. After one year of use, the corrosion of the pump should be checked and rust should be removed and painted. If the submersible pump is not used for a long time, it should be carefully inspected and stored in a dry and ventilated house.