I. What is the function of the self-control self-priming pump solenoid valve
The electric air solenoid valve is for WFB series unsealed self-control self-priming pump or other types of sealless self-priming pump It is one of the important components of self-priming pump. As one of the components of the self-priming pump, the electric valve is installed on the intake pipe of the suction port. When the pump is started, the electric control valve seals the intake port on the suction pipe of the pump body, so that a vacuum is formed in the pump cavity of the self-priming pump. The whole process of self-priming. When the pump is stopped, the electric control valve is opened, the air enters from the airtight port, and the liquid pipe of the pump rapidly isolates the medium co-flowing in the suction pipe to ensure that the medium in the pump cavity does not fall back into the suction pool with the medium in the suction pipe cavity, so as to eliminate the The purpose of siphon is to ensure the normal self-priming and operation of the self-priming pump during the second self-priming.
Second, the working principle of the self-control self-priming pump solenoid valve
The solenoid valve wiring is connected in parallel with the pump motor power supply (any two lines of three-phase three-wire 380V power supply, The voltage is 380V), when the self-priming pump motor starts, the solenoid valve is energized at the same time, and when the solenoid core pulls the armature, it drives the elastic frame to move down, and drives the valve core piston rod to press the sealing gasket at the bottom of the piston cylinder to achieve sealing. Close the air inlet vent hole on the suction pipe, so that the self-priming pump starts self-priming and enters the normal operation state. When the power failure causes the motor to be cut off, the solenoid valve solenoid coil is cut off at the same time, the magnetic force of the electromagnet core disappears, the elastic frame moves up and resets due to the reaction of the compression spring, drives the valve core rod piston away from the bottom of the piston cylinder, and opens the vent hole. Air enters the suction pipe cavity, isolates the medium in the pump cavity from the medium in the suction pipe, eliminates siphon, and ensures the medium storage in the pump cavity of the self-priming pump for self-priming and normal operation when the pump is started next time.
Three, how to adjust the self-control self-priming pump
1. Open the controller cover first, then turn the adjustment knob in the middle clockwise with a flat-blade screwdriver. , in order to obtain higher disconnection pressure;
2. Unscrew the air filling nut on the pressure tank, and use a pump to add gas to it, so that the air pressure tank can play a role in regulating the pressure.
