Working principle of direct-acting solenoid valve, structure diagram of direct-acting solenoid valve

The function of the direct-acting solenoid valve The direct-acting solenoid valve is used for small-diameter, low-pressure fluid media. When the structure of the direct-acting solenoid valve is opened, it does not require the opening pressure of the medium and can be started at zero pressure. In order to enhance the service life The wind is installed on the horizontal pipe with the coil facing upward. The direct-acting solenoid valve has the characteristics of small size, large flow rate, and fast response speed. It is particularly suitable for the use of direct-acting solenoid valves in situations where the frequency of opening and closing is relatively high or rapid shutdown is required. valve. Working principle of direct-acting solenoid valve Direct-acting solenoid valve: When the power is on, the solenoid coil generates electromagnetic force to lift the seal from the valve seat, and the valve opens;when the power is off, the electromagnetic force disappears and the spring presses the seal against the valve seat. , the valve is closed. Normally closed direct-acting solenoid valve: When the power is turned on, the solenoid coil generates enough electromagnetic force to lift the moving parts (valve stem, valve core, seal) from the valve seat, and the valve opens;when the power is turned off, the spring force presses the moving parts on the valve seat. On the valve seat, the valve is closed. Normally open direct-acting solenoid valve: the action direction is opposite to that of the normally closed type. Direct-acting solenoid valve structural composition diagram. The nominal size of the small-diameter direct-acting solenoid valve (Figure 1) is not larger than DN10. The lower part of the moving iron core is inlaid with a sealing plug. The up and down movement of the moving iron core can realize the on-off control of the working medium of the solenoid valve. , so it is called a direct-acting solenoid valve. Figure 1 Small diameter direct-acting solenoid valve 1-valve body;2-spring;3-valve cover;4-moving iron core;5-coil;6-static iron core direct-acting two-way solenoid valve. This type of solenoid valve has advanced design and The performance is reliable and the working pressure can range from 0 (no pressure difference) to 4.0MPa. It is especially suitable for vacuum systems with conditions less than or equal to 1.33×10-7MPa. This valve can realize the flow of medium in both forward and reverse directions (sealing in both forward and reverse directions). Figure 2 Direct-acting two-way solenoid valve 1—solenoid head;2—moving iron core;3—valve stem assembly;4—valve seat;5—direct-acting three-way solenoid valve with small valve body diameter (Figure 3) in China Very common, generally 0 ~ 1.0MPa, direct-acting solenoid valves with solenoid valves less than or equal to DN3 are widely used at home and abroad, and most of them are used as pilot valves for multi-port pneumatic solenoid valves. Figure 3 Direct-acting three-way solenoid valve, but three-way and four-way (five-way) solenoid valves with larger diameters of DN12 to 50 have been blank in China in the past. After the manufacturing technology of the German HERI-ON company was introduced into the country, localization has been achieved through digestion and absorption. It is not only used as a multi-way solenoid valve for actuators, but also used in hydraulic and pneumatic actuators. The direct-acting two-position three-way solenoid valve (Figure 4) can realize four functions of normally closed, normally open, reversing, and converging according to the different connecting positions. Figure 4 Direct-acting two-position three-way solenoid valve 1-valve body;2-valve seat;3-valve stem assembly;4-moving iron core;5-solenoid head direct-acting two-position four-way solenoid valve (Figure 5) and The direction of the inlet and working port (normally open and normally closed) of the two-position five-way solenoid valve are certain. Among them, the direct-acting two-position four-way solenoid valve combines the exhaust ports of the "A" and "B" working ports into one to form a direct-acting two-position four-way solenoid valve. Figure 5 Direct-acting two-position four-way (two-position five-way) solenoid valve 1—valve body;2—valve seat;3—valve stem assembly;4—sealing ring;5—moving iron core;6—return spring;7 —The working principle of the direct-acting solenoid valve is shown above the solenoid head. The structural composition diagram of the direct-acting solenoid valve is introduced. If you want to know more relevant information, please log in to Sunway Pneumatic www.diancifa.cc to view it.