The vacuum auxiliary device of submersible acid pump is mainly composed of controller, vacuum pump, steam-water separator, liquid level sensor, exhaust valve and other parts connected by wires and pipes, and the body is installed on the self-priming pump. The liquid level sensor is installed in the exhaust valve, and the exhaust valve is installed at the inlet of the self-priming pump. The upper part of the exhaust valve is connected by a pipeline through the solenoid valve, the suction port of the vacuum pump of the steam-water separator, the liquid level sensor, and the motor of the self-priming pump. And the vacuum pump motor is connected to the control cabinet through the power line, so as to realize the automatic control of the vacuum pump and the self-priming pump through the control cabinet key. A check valve is installed at the outlet of the vacuum pump. Press the start button of the control cabinet, and the vacuum pump will start first (it can also be made into a vacuum pump and a self-priming pump). The pump body and the inlet pipeline form a vacuum negative pressure state, so that the medium fills the inlet pipeline and pump body of the self-priming pump. After the pump body and the inlet pipe of the self-priming pump are filled with water, they will enter the exhaust valve installed above the outlet of the self-priming pump. When the liquid level in the exhaust valve reaches a certain position, the liquid level sensor in the exhaust valve will signal Transfer the control cabinet, the control cabinet will close the vacuum pump and solenoid valve, and start the self-priming pump to enter the working state normally. Solenoid valve and steam-water separator can ensure that water does not enter the vacuum pump and cause damage to the vacuum pump. Anyway, if the liquid in the exhaust valve drops, it proves that the suction of the self-priming pump itself is not enough, the liquid level sensor will send a signal to the control cabinet, and the control cabinet will restart the vacuum pump to assist the self-priming pump to increase the suction stroke.

Submersible acid pump maintenance knowledge:

1. The combination of the motor and the pump must be calibrated accurately so that the motor and the pump are in the same line.

2. Before maintenance and cleaning of the self-priming pump, make sure that the connected power supply is turned off, the residual liquid in the pump body is discharged, and the entrance and exit are closed. The maintenance personnel should wear protective clothing and protective masks, safety shoes and socks.

3. Fasten the impeller with the fixing screw of the impeller in a clockwise direction. The gap between the impeller and the middle cover is about 1-1.5MM, and the size of the gap will wear the impeller.

4. Regularly check the access buckle to prevent foreign objects from blocking the pump body, causing the motor to run idly and burning the pump.

5. The shaft seal guard is fixed on the rear shaft seal. When the rear cover is locked on the foot seat, it must be in the center of the pump.

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