Solenoid valve is an industrial equipment controlled by electromagnetic. It is an automation basic component used to control fluid. It belongs to actuator; it is not limited to hydraulic and pneumatic. It is widely used in our daily life. First of all, we have a preliminary understanding of solenoid valves. Solenoid valves are composed of solenoid coils and magnetic cores, and are valve bodies containing one or more holes. When the coil is energized or de-energized, the operation of the magnetic core will cause the fluid to pass through the valve body or be cut off to achieve the purpose of changing the direction of the fluid.
The working principle of the solenoid valve: There is a closed cavity in the solenoid valve with through holes at different positions. Each hole leads to a different oil pipe. In the middle of the cavity is the valve. On both sides are two electromagnets. Which side of the magnet coil is energized The valve body will be attracted to which side, by controlling the movement of the valve body to block or leak out the different drain holes, and the oil inlet hole is normally open, the hydraulic oil will enter the different drain pipes and then pass the oil The pressure to push the piston of the cylinder, the piston drives the piston rod, and the piston rod drives the mechanical device to move. In this way, the mechanical movement is controlled by controlling the current of the electromagnet.
According to the principle, solenoid valves are divided into three categories: direct-acting, distributed direct-acting, and pilot-operated; according to their structure, they are divided into two types: diaphragm solenoid valves and piston solenoid valves.