There is a closed cavity in the solenoid valve, and there are through holes in different positions. Each hole is connected with a different oil pipe. There is a piston in the middle of the cavity and two electromagnets on both sides. When the solenoid is energized, to which side will the valve body be attracted. By controlling the movement of the valve body, different oil discharge holes are opened or closed, and the oil inlet hole is always open.
Hydraulic oil will enter different oil discharge pipes, and then push the piston of the oil cylinder through the pressure of oil, and then drive the piston rod, which drives the mechanical device. In this way, the mechanical movement is controlled by controlling the on-off of the electromagnet.
Hydraulic solenoid valve refers to the components used to control the pressure, flow and direction of liquid in hydraulic transmission. Among them, those that control pressure are called pressure control valves, those that control flow are called flow control valves, and those that control switches and flow directions are called directional control valves.
Extended data:
1, external leakage plugging, internal leakage easy to control, safe to use.
The structure of the solenoid valve can easily control the internal leakage until it is reduced to zero. Therefore, the use of solenoid valves is particularly safe, especially suitable for corrosive, toxic or high and low temperature media.
2, the system is simple, computers can be easily connected, and the price is low.
The solenoid valve itself is simple in structure and low in price, which is easier to install and maintain than other actuators such as regulating valves. More notably, the automatic control system is simpler and cheaper. Because the solenoid valve is controlled by the switch signal, it is very convenient to connect with the industrial computer. In today's era when computers are popular and prices are falling sharply, the advantages of solenoid valves are more obvious.
3, action express, low power, light shape.
The response time of the solenoid valve can be as short as several milliseconds, and even the pilot solenoid valve can be controlled within tens of milliseconds. Because of its own circuit, it is more sensitive than other automatic control valves. Properly designed solenoid valve coil has low power consumption and belongs to energy-saving products. It can also automatically maintain the valve position only by triggering action, and it does not consume electricity at ordinary times. The solenoid valve is small, space-saving, light and beautiful.
4, the adjustment accuracy is limited, and the applicable medium is limited.
Solenoid valves usually have only two switching states, and the valve core can only be in two extreme positions, so the adjustment accuracy is limited.
5, various models, a wide range of uses
Although the solenoid valve has inherent shortcomings, its advantages are still outstanding, so it is designed into a variety of products to meet various needs and has a wide range of uses. The progress of solenoid valve technology is also around how to overcome the congenital deficiency and how to give full play to its inherent advantages.
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