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The formal operation method of the centrifugal pump when starting up is as follows:
1. Check before the start of the centrifugal pump
1) Motor installation test Check the rotation direction of the motor before connecting the coupling.
2) Check the pump inlet and outlet pipelines and auxiliary pipelines, flanges, valve installation requirements, grounding bolts and grounding wires for safety hazards, and whether the couplings are properly installed.
3) Pay attention to whether the rotation is normal when checking the car.
4) Check if the oil level of the lubricating oil is normal. When there is no oil, immediately add oil and check the oil quality of the lubricating oil (fat).
5) Open each cooling water valve and check if the pipeline is clear. Note that the cooling water should not be too large or too small, too much waste is caused by the assembly, and if it is too small, the cooling effect is poor. Generally, the cooling water flows in a line shape.
6) Open the inlet valve of the pump, close the outlet valve of the pump, and open the pressure gauge hand valve.
7) Check the sealing condition of the pump and the opening of the oil seal.
Note: The hot oil pump should be evenly warmed up before starting.
2. Start of the centrifugal pump
1) Open the inlet valve fully, close the outlet valve, and start the motor.
2) When the pump outlet pressure is greater than the operating pressure, check that all parts are operating normally and gradually open the outlet valve.
3) When starting the motor, if it does not start up or there is abnormal sound, immediately turn off the power check and start it after troubleshooting.
4) When starting, pay attention to the operator not facing the coupling to prevent the fault from flying out and hurting people.
3. Centrifugal pump stop pump operation
1) Slowly close the pump outlet valve.
2) Cut off the power to the motor.
3) Close the pressure gauge hand valve.
4) After stopping, the cooling water should not be stopped immediately, and the water must be stopped when the temperature of the pump drops below 80 °C.
5) Close the inlet valve as needed and the pump body is vented.
4. Operation and maintenance during the operation of the centrifugal pump (other pumps should be operated properly and in peacetime during operation)
When the centrifugal pump is in normal operation, the pump driver should carefully inspect the following links:
1) Check the pump outlet pressure, flow, current, etc. Remember to not overload the machine and accurately record the current, pressure and other parameters.
2) Listen to the sound, distinguish the running sound of the pump and the motor, and judge whether there is an abnormality.
3) Check whether the vibration of the pump, motor and pump base is abnormal. If the vibration is serious, change the pump to check.
4) Check the temperature of the bearing housing of the motor casing and the pump. The temperature of the bearing housing does not exceed 65 degrees and the motor temperature does not exceed 95 degrees.
5) Ensure the normal oil quality of the lubricating oil and the liquid level of the lubricating oil tank. The level of the lubricating oil tank is subject to the scale when there is a scale; there is a window (oil mark) without a scale line, the oil level should be maintained between 1/3 and 1/2, and the lubricating oil leaks at the normal oil level. Should not exceed 5 drops / min, pressure oil injection, subject to the machine description.
6) Check the pump seal and the flanges, plugs, cooling water, and oil seals.
7) Check the standby condition of the spare pump and drive it once a day. (Our factory is essential to do these tasks every day. In addition to centrifugal pumps, magnetic pumps, mortar pumps, fluoroplastic pumps, etc. also eliminate all existing safety hazards so that users can rest assured that they are put into use and trust Changyu).
5. Centrifugal pump switching operation
In order to ensure that when the pump is switched, the parameters such as flow rate and pressure are basically unchanged, and there is no fluctuation, and the two people operate at the same time.
1) Prepare the pump before starting the pump.
2) One person first turns on the standby pump. After the centrifugal pump runs normally and smoothly, the outlet valve is slowly opened. At this time, with the opening of the pump outlet valve, the outlet valve pressure of the pump decreases slightly, but the motor current increases. The other person should slowly close the outlet valve to stop the pump. When the pump flow in operation is large enough to a certain value, the outlet valve of the pump should be stopped and then completely shut down. Finally, the power supply is cut off and the pump is stopped normally.
The above is the correct specific operation flow of the centrifugal pump. If there is any solution, please come to Changyu Pump Valve to ask, here also thank the majority of users for the trust and support of Changyu!