Mechanical system maintenance of sewage pumps
The maintenance of the mechanical system of the sewage pump is the key to ensure its normal operation, improve operating efficiency and extend its service life. The following is a detailed explanation of the maintenance of the mechanical system of the sewage pump:
1. Daily inspection and maintenance
Pipeline and connection inspection:
Regularly check whether the sewage pump pipeline and its connection parts are tight and there is no looseness. Manually rotate the sewage pump to confirm whether it runs flexibly.
Bearing lubrication:
Inject an appropriate amount of bearing lubricating oil into the bearing body, ensure that the oil level is at the center line of the oil mark, and regularly check the oil quality and oil quantity, and replace or replenish the lubricating oil in time. For newly put into use, the lubricating oil should be replaced after 100 hours of operation, and then the lubricating oil should be replaced every 500 hours of operation.
Pre-charging and start-up preparation:
Open the water inlet screw plug of the sewage pump body, inject clean water or slurry for pre-charging, especially for self-priming sewage pumps, this step is particularly critical.
Make sure that the gate valve, outlet pressure gauge and inlet vacuum gauge of the outlet pipeline are all in the closed state to prepare for starting.
Motor jog test:
Perform a motor jog test to verify whether the motor direction is correct, and then start it formally after ensuring that it is correct.
Start and operation observation:
Start the motor, wait for the sewage pump to run stably, open the outlet pressure gauge and the inlet vacuum gauge, observe the pressure display, and gradually open the gate valve. At the same time, pay close attention to the motor load condition to ensure that it is within the normal range.
2. Monitoring and adjustment during operation
Flow and head control:
Try to ensure that the flow and head of the sewage pump meet the specified range on the equipment nameplate to achieve optimal operating efficiency and energy saving effects.
Temperature monitoring:
Pay close attention to the bearing temperature to ensure that it does not exceed the ambient temperature of 35℃, and the maximum temperature does not exceed 80℃ to avoid overheating damage.
Abnormal handling:
Once the sewage pump is found to be running abnormally or making abnormal noises, it should be stopped immediately for inspection, and continue to run after troubleshooting.
3. Regular maintenance and overhaul
Packing gland adjustment:
Regularly check and adjust the packing gland to ensure that the packing chamber maintains a suitable dripping state to avoid excessive or insufficient leakage.
Sleeve and mechanical seal inspection:
Check the wear of the sleeve regularly. If the wear is serious, replace the new sleeve in time. At the same time, check whether the mechanical seal is in good condition. If abnormal, repair it. Check whether the mechanical seal oil is turbid. If turbid, replace it in time.
Overall disassembly and maintenance:
After one year of use, the sewage pump can be repainted for rust prevention according to the surface corrosion. After two years of use, a comprehensive disassembly and maintenance should be carried out. The wear and corrosion of each component should be disassembled and checked, and repaired or replaced if necessary. At the same time, adjust the gap between each part, adjust and measure the horizontality and verticality of the pump body, and apply anti-corrosion paint on the surface and foundation of the equipment.
Seasonal and long-term outage treatment:
When using the sewage pump in the cold winter, open the drain plug at the bottom of the pump body after parking, and drain the medium completely to prevent the pump body from freezing and cracking. If the sewage pump needs to be out of use for a long time, it should be fully disassembled, the internal moisture should be removed, and anti-rust grease should be applied to the rotating parts and connections before proper storage.
IV. Professional maintenance and technical support
When the sewage pump is damaged, it should be repaired by professionals in time. Do not open it and repair it yourself without understanding the internal structure. Remember to repair it with power on during use. After the sewage pump is repaired, the insulation and sealing performance of the pump should be checked to ensure safe operation when the sewage pump continues to be used.
