Do you know how solenoid valve works?

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There is a closed cavity in the solenoid valve. There are through holes in different positions. Each hole leads to different oil pipes. There is a valve in the middle of the cavity and two electromagnets on both sides. The valve body will be attracted to which side when the magnet coil is electrified. The movement of the valve body will be controlled to block or leak different oil drain holes. The oil inlet hole is normally open, and the hydraulic oil will enter different oil drain pipes, and then the valve body will be opened Through the oil pressure to push the oil rigid piston, the piston drives the piston rod, the piston rod drives the mechanical device. In this way, the mechanical movement is controlled by controlling the current of the electromagnet. The above is the working principle of the solenoid valve.