A submersible sewage pump is a type of pump that is installed underwater and is used to pump out wastewater, sewage, and other liquids that contain solid particles. Submersible sewage pumps are more efficient and easier to maintain than conventional pumps as they are designed to be installed and operated underwater.

Maintenance Points for Submersible Sewage Pumps:

1. Regularly check the working condition of the pump and its components, such as the motor and bearings.

2. Check the electrical connections and wiring of the pump frequently.

3. Regularly clean and inspect the suction and discharge lines as well as the pump itself.

4. Ensure that the inlet and outlet of the pump are not blocked.

5. Lubricate the motor, bearings, and other moving parts of the pump regularly.

6. Inspect the pump for any signs of wear and tear and replace any worn-out parts.

7. Ensure that the power supply to the pump is adequate.

1. Improper installation: Fire pumps should be installed according to the manufacturer's instructions to ensure that the pump is properly sealed with the piping, and that the suction and discharge connections are properly secured.

2. Corrosion: Fire pumps should be regularly inspected and maintained to prevent corrosion that can lead to leaks.

3. Shaft misalignment: Fire pumps should be aligned properly before start-up to prevent leakage.

4. Damaged seals: Fire pumps should be inspected regularly to check for damaged seals that could be causing the leakage.

5. Improperly sized components: Fire pumps should be installed with properly sized components to ensure that the pump operates efficiently and without leakage.

6. Worn impellers: Impellers should be inspected and replaced if necessary to prevent leakage.

To install a fire pump, you should:

1. Check the manufacturer's instructions and ensure that the pump and all components are properly sized and rated for the application.

2. Assemble the pump and make sure that all connections are secure and sealed properly.

3. Align the pump and make sure that the shaft is properly aligned.

4. Check the seals for any signs of damage and replace as needed.

5. Start the pump and check for any signs of leakage.

6. Make any necessary adjustments to ensure that the pump is operating properly.

1. Maintenance of Anti-Water Pump Control Valve

a. Check the valve body and pipe joints for leakage and rust. If there is any problem, repair or replace it in time.

b. Check the valve stem for wear and tear and repair or replace it in time if necessary.

c. Check the valve core and valve seat for wear and tear and repair or replace it in time if necessary.

d. Check whether the valve stem is flexible and easy to operate.

e. Check the valve core and valve seat for rust and replace them in time if necessary.

f. Check the filter screen and replace it in time if it is blocked.

2. Application Principle of Multi-functional Control Valve

The multi-functional control valve is a kind of valve used to control the flow of fluid in the pipeline system. It is mainly composed of a valve body, a valve core, a valve seat, a valve stem and a filter screen. The valve body is connected to the pipeline system, and the valve core is connected to the valve stem. When the valve is in the open position, the valve core is pushed against the valve seat by the valve stem, which allows the fluid to flow through the valve body. When the valve is in the closed position, the valve core is pulled away from the valve seat by the valve stem, which blocks the flow of the fluid. The filter screen is used to filter out impurities in the fluid.

1. Check the cooling system of the fire pump, ensure that the cooling system is in good condition, and ensure that the water temperature is kept within the normal range.

2. Check the installation of the fire pump, ensure that the pump is installed correctly, and that the pipe joints are not leaking.

3. Check the water pressure at the water inlet, and adjust the pressure if necessary.

4. Check the motor of the fire pump to ensure that it is operating correctly.

5. Check the pipeline of the fire pump, ensure that the pipeline is clear, there is no blockage, and the water flow is smooth.

6. Reduce the load of the fire pump, reduce the load on the fire pump, and make sure that the pump is not overworked.

7. Increase the water inlet pressure: Increasing the water inlet pressure can help reduce the temperature of the fire pump body. This can be achieved by installing a larger pipe or increasing the size of the pump impeller.

8. Increase the size of the fire pump body: Increasing the size of the fire pump body can help dissipate the heat generated by the pump.

9. Adjust the water flow rate: Adjusting the water flow rate can help reduce the temperature of the fire pump body. This can be done by adjusting the speed of the pump motor or the size of the suction pipe.

10. Install cooling fans: Installing cooling fans can help reduce the temperature of the fire pump body.

11. Insulate the pump body: Insulating the pump body can help reduce the temperature of the fire pump body.


12. Check the water flow rate. If the flow rate is too high, the pump may be overloaded and cause the temperature to increase. Adjust the flow rate to reduce the temperature.

13. Check the inlet water pressure. If the pressure is too high, it can cause the pump to overheat. Install a pressure reducing valve to reduce the pressure.

14. Check the pump impeller. If the impeller is blocked or worn, it can cause the pump to overheat. Clean or replace the impeller to improve the performance.

15. Check the pump motor. If the motor is overloaded, it can cause the pump to overheat. Check the motor and replace or adjust it as needed.

16. Check the pump casing. If the pump casing is not properly sealed, it can cause the pump to overheat. Make sure the casing is properly sealed and vented.

17. Check the cooling system. If the cooling system is not working properly, it can cause the pump to overheat. Check the cooling system and make sure it is functioning properly.

Method:

1. Drain the oil from the pump by removing the drain plug.

2. Remove the filter and replace it with a new one.

3. Fill the pump with the new oil until it reaches the recommended level.

4. Replace the drain plug and start the pump to ensure proper oil flow.

5. Check the oil level and adjust if necessary.

How to deal with vibration isolation:

1. Install vibration isolators in the mounting location of the pump to reduce vibration and noise.

2. Check the mounting location for any loose bolts or other components that could cause vibration.

3. Use rubber grommets or other cushioning materials between the pump and its mounting surface.

4. Increase the distance between the pump and the surface it’s mounted on.

5. Make sure the pump has adequate support and is not mounted on an unstable surface.

1. Technical requirements for self-inspection of fire pumps

(1) Strictly follow the requirements of national standards and relevant technical documents, and carry out self-inspection of fire pumps in accordance with the operation and maintenance manual.

(2) The fire pump should be tested in accordance with the installation requirements, and the self-inspection shall be carried out in accordance with the requirements of the inspection plan.

(3) Test the power system, control system and protection system of the fire pump, and check whether the wiring is firm and reliable.

(4) Test the performance of the fire pump, including the pressure, flow, vibration, noise and temperature rise.

(5) Check whether the parts of the fire pump are intact and the fastening bolts are firm and reliable.

2. Common sense for installation and maintenance of fire pumps

(1) Fire pumps should be installed in a ventilated and dry place, and the maintenance room should be equipped with the necessary fire protection and monitoring equipment.

(2) The installation and debugging of the fire pump should be carried out by professional and experienced personnel.

(3) After the installation and debugging of the fire pump are completed, the operation and maintenance manual should be read carefully, and the relevant personnel should be trained and qualified before they can be put into use.

(4) The fire pump should be inspected and maintained regularly, and the lubricating oil should be replaced regularly.

(5) The operation and maintenance personnel should be familiar with the operation and maintenance procedures of the fire pump.