The working principle of pneumatic solenoid valve, there are several types of pneumatic solenoid valve

The working principle of the pneumatic solenoid valve is that the electrical conversion component converts the electrical signal into a pneumatic signal, and the electrical signal input controls the pneumatic output. The most commonly used electro-pneumatic conversion component is Solenoid actuated valves. The solenoid valve is not only the interface between the electrical control part and the pneumatic execution part, but also the interface with the air source system. The solenoid valve accepts commands to release, stop or change the flow direction of compressed air. In electro-pneumatic control, the functions that the solenoid valve can implement include: direction control of the action of the pneumatic actuator component, ON/OFF switch control, OR/NOT/AND Logic control. Among the solenoid valve family, the most important is the solenoid actuated directional control valves. The working principle of the electromagnetic control reversing valve In the pneumatic circuit, the function of the electromagnetic control reversing valve is to control the opening and closing of the air flow channel or change the flow direction of the compressed air. The main working principle is to use the electromagnetic force generated by the electromagnetic coil to push the valve core to switch and realize the reversal of air flow. According to the different ways of pushing the reversing valve by the electromagnetic control part, it can be divided into direct-acting solenoid valve and pilot-operated solenoid valve. Direct-acting solenoid valves directly use electromagnetic force to push the valve core to change direction, while pilot-operated reversing valves use the pilot air pressure output from the solenoid pilot valve to push the valve core to change direction. Figure 4.2a shows a simple cross-sectional view and working principle of the structure of a 3/2 (three-way, two-position) direct-acting solenoid valve (normally off type). When the coil is energized, the static iron core generates electromagnetic force, the valve core moves upward due to the electromagnetic force, and the sealing gasket is lifted, connecting 1 and 2, disconnecting 2 and 3, and the valve is in the air intake state, which can control the cylinder action. When the power is cut off, the valve core returns to its original state by the action of spring force, that is, 1 and 2 are off, 2 and 3 are on, and the valve is in the exhaust state. Figure 4.2b shows a simple cross-sectional view and working principle of the 5/2 (five-way, two-position) direct-acting solenoid valve (normally off type). In the initial state, 1, 2 air intake;4, 5 exhaust;when the coil is energized, the static iron core generates electromagnetic force to move the pilot valve, and the compressed air enters the valve pilot piston through the air path to start the piston. In the middle of the piston, the seal The round surface opens the channel, 1, 4 air intake, 2, 3 exhaust;when the power is cut off, the pilot valve resets under the action of the spring and returns to its original state. Valve Function: (Function) The solenoid valve menu shows its electrical-to-pneumatic switching complexity. The function of the valve is represented by two numbers: M and N, which are called M-channel N-position solenoid valves. "N-position" indicates the switching position of the reversing valve and also indicates the status of the valve. The number of valve positions is the value of N. For example, a two-position valve has two position options, that is, two states, and a three-position valve has three position options, that is, three different states. "M path" represents the path of the valve's external interface, including the air inlet, air outlet and exhaust port. The number of paths is the value of M, such as two-way valve, three-way valve, etc. The valve in the example in Figure 4.1a is a 3/2 direct-acting solenoid valve, which is pronounced as "three-way two-position valve", which means that the valve has two positions, namely "on" and "off" states, and has three air ports. , respectively 1: air inlet, 2: air outlet, 3: exhaust port. There are several types of pneumatic solenoid valves. Common solenoid valves include two-position three-way, two-position five-way, three-position five-way 3V1 series, 3V2 series, 3V3 series, 3V100-3V300 series, 4V100-4V300 series and 7V series solenoid valves. There are also integrated valve CPV15 series and ISO standard solenoid valve ESV series. The above is the working principle of pneumatic solenoid valves. There are several models of pneumatic solenoid valves. Shenwei Pneumatic is a professional manufacturer of pneumatic solenoid valves. Customers are welcome to call for consultation.