Sewage pump pre-startup inspection
The pre-start inspection of the sewage pump (sewage pump) is an important part of ensuring its normal operation and extending its service life. Here are some key inspection steps and points:
1. Electrical system inspection
Insulation resistance inspection: Use an insulation resistance meter to check the insulation resistance from the motor stator winding to the ground to ensure that it is within the specified range to prevent electrical faults.
Cable inspection: Check whether the cable is intact and free of damage, aging or cracks. The cable cross-section should match the rated current of the motor to ensure safe transmission of electrical energy. At the same time, the grounding wire of the four-core cable must be reliably grounded to prevent electric shock accidents.
Voltage inspection: Confirm whether the power supply voltage is within the range of ±10% of the rated voltage of the motor. Exceeding this range may cause the motor to fail to start or be damaged.
Control switch inspection: Check whether the control switch, signal light and voltmeter and other indicating devices are working properly to ensure that they can accurately reflect the working status of the motor.
2. Mechanical system inspection
Anchor bolt and bracket inspection: Check whether the anchor bolt and bracket of the sewage pump are firm and not loose. This helps prevent vibration and noise during operation of the pump.
Rotating parts inspection: Check whether the rotating parts such as the pump shaft and impeller are flexible and unobstructed, and whether the lubrication is good. If necessary, add or replace the lubricating oil.
Direction confirmation: Confirm whether the rotation direction of the pump is correct. For some types of sewage pumps, the wrong rotation direction may cause the pump to malfunction or be damaged.
3. Operation environment inspection
Inlet and outlet gate valve inspection: Check whether the inlet and outlet gate valves of the sewage pump are fully opened to ensure that the pump can absorb and discharge water normally after starting.
Collection well cleaning: Before the sewage pump enters the water, the debris and sediment in the collection well should be cleaned to prevent clogging the pump body or affecting the working efficiency of the pump.
Safety protection inspection: Check whether there is enough safety space around the sewage pump to avoid personal injury accidents when the pump is running. At the same time, ensure that the power cord and cable of the sewage pump are not soaked in water or other liquids.
4. Other inspections
Lubricating oil inspection: For parts that need lubrication (such as bearings), check whether the lubricating oil is sufficient and clean, and replenish or replace it if necessary.
Alarm system inspection: If the sewage pump is equipped with an alarm system (such as overheat protection, overload protection, etc.), check whether it is working properly.
Record and report: After the inspection is completed, the inspection results should be recorded and reported to relevant personnel. If there are any abnormal conditions or parts that need repair, they should be handled in a timely manner.
