Working principle of solenoid valve

There is a closed cavity inside the solenoid valve, the piston is in the middle of the cavity, and two electromagnets are on both sides of the cavity. Once the electromagnet coil is energized, the valve body is attracted to the direction of the energized electromagnet by force; There is a through hole, which is connected to different oil pipes, so you can choose which part of the oil drain hole to open by controlling the movement of the valve body; because the oil inlet hole is normally open, the movement of the valve body causes the hydraulic oil to enter different oil drain pipes. The pressure of the oil pushes the piston of the oil cylinder, which in turn pushes the piston rod, thereby driving the mechanical device. Using this principle, the function of controlling the mechanical movement by controlling the on-off of the electromagnet current can be realized.