Precautions for Using Self-Priming Agitating Sewage Pumps and Their Maintenance

The JYWQ series self-priming agitating sewage pumps are equipped with an automatic agitating device based on ordinary sewage pumps. This device rotates with the motor shaft, generating a strong stirring force that turns sediments in the sewage tank into suspended matter, which is then sucked into the pump and discharged. This enhances the pump's anti-clogging and sewage-discharging capabilities, completing drainage, cleaning, and desilting in one go while saving operating costs. They are advanced and practical environmental protection products.

Precautions for Using Self-Priming Agitating Pumps  

1. Before operation, use a megohmmeter to check the insulation resistance of the motor stator windings to the ground. It must be at least 50 megohms.  

2. Inspect the cable for damage or breaks. If damaged, replace it promptly to avoid electric leakage; the cable cross-section should match the current.  

3. Never use the cable as a lifting rope during installation.  

4. For safety, the grounding wire in the four-core cable must be reliably grounded to prevent electric shock accidents.  

5. When submerging the pump into water, lift it vertically. Never lay it horizontally on the ground, let alone let it sink into sludge. When not in use, lift the pump, clean it thoroughly, store it in a dry place, and protect it from freezing.  

6. Do not start the pump if the voltage deviates by more than ±10% from the rated voltage.  

7. Always cut off the power when moving the pump. Never touch the water source while the pump is running to avoid electric shock.  

8. Outdoor switches or grounding terminals must be protected from rain and moisture. Never touch switches with wet hands or bare feet to prevent electric shock.  

9. Check the rotor rotation direction: it should rotate clockwise when viewed from above.

10. After the pump has been running normally in the specified working medium for half a year, check the sealing condition of the oil chamber. If the oil in the chamber turns emulsified or has water sediment, replace it with 10-20 grade mechanical oil and the mechanical seal in time. For pumps used under harsh conditions, inspect them more frequently.  

11. When the JYWQ sewage pump is running, it should be managed by a dedicated person. If any abnormal occur, stop the pump immediately for inspection and troubleshooting (this applies when no full-automatic protection cabinet is equipped).  

12. Never let the motor run without a phase. If a fuse blows, check the cause before reuse; never arbitrarily replace it with a thicker fuse.  

13. Users should select the appropriate flow and head according to actual working conditions to achieve the desired effect. The parameters shown on the pump nameplate or manual are its optimal working conditions. Users can operate it within 0.7-1.2 times the flow rate. Overflow operation is prohibited, as excessive flow and too low head may cause motor overload.

Maintenance of Self-Priming Agitating Sewage Pumps  

1. The pump should be managed and used by a dedicated person, and the insulation resistance between the pump windings and the casing should be checked regularly to ensure it is normal.  

2. After each use, especially when handling thick or viscous media, immerse the pump in clean water and run it for a few minutes to prevent sediment from remaining inside and keep the pump clean.

3. After disassembling and repairing the pump, the casing assembly must undergo a 0.6MPa air pressure test to ensure reliable sealing of the motor and oil chamber.  

4. Check the pump pipelines and joints for looseness. Rotate the pump by hand to see if it moves freely.  

5. Add bearing lubricating oil to the bearing housing, ensuring the oil level is at the centerline of the oil gauge. Replenish or replace the oil in time.  

6. Unscrew the priming plug on the pump body and pour in priming water (or slurry).  

7. Close the gate valve on the outlet pipeline, as well as the outlet pressure gauge and inlet vacuum gauge.  

8. Jog the motor to check if its rotation direction is correct.  

9. Start the motor. Once the pump is running normally, open the outlet pressure gauge and inlet vacuum gauge. When they show appropriate pressure, gradually open the gate valve while checking the motor load.  

10. Try to control the pump's flow and head within the range indicated on the nameplate to ensure it operates at the highest efficiency point, thus achieving maximum energy savings.  

11. During operation, the bearing temperature should not exceed 35°C above the ambient temperature, and the maximum temperature must not exceed 80°C.