Working principle of self-maintaining solenoid valve, structure diagram of self-maintaining solenoid valve

The self-maintaining solenoid valve adopts a double-coil structure. The coil works when the power is energized and maintains when the power is turned off. It is especially suitable for the conditions where the solenoid valve needs to remain open or closed for a long time. Therefore, the coil does not generate heat at all, which fundamentally eliminates Even if the coil is burned, it saves energy and reduces consumption, and has a long service life. The dual-coil solenoid valve is a new type of valve that is designed to save energy in automated control so that the solenoid valve coil does not need to be energized for a long time, but the solenoid valve is still in working condition. The working principle of the self-maintaining solenoid valve is shown in the figure. As the name suggests, the double-coil solenoid valve must have two solenoid coils. Coil A is used to control the opening of the solenoid valve. When coil A is energized instantaneously, the coil generates strong magnetism, causing The upward movement of the valve core drives the piston up, thereby opening the valve instantly;the valve core in coil B and the valve core of A are in an interlocking relationship. Through mechanical interlocking, they are not interfered by external electromagnetic, current and other signals. Its reliability is currently the best. The most stable of all self-retaining structures. When the valve core of coil A moves upward to the top position, it is locked by the valve core of coil B. At this time, the valve core of coil A still remains in the open position when the power is turned off. Similarly, when the valve needs to be closed, only the valve core needs to be closed. It usually only takes 1 to 2 seconds for coil B to energize an instantaneous electrical signal. After the valve core of coil B is closed, the valve core of coil A completes the closing instantaneously under the action of spring elastic force, the gravity of the valve core and piston, and the medium pressure. valve action. The initial state of the self-retaining double control solenoid valve is closed. The opening and closing of the dual-control solenoid valve are controlled by a separate coil. During automatic control, input a pulse power supply to the valve opening (side) coil, and the solenoid valve will open. After power failure, the solenoid valve is still open;when it needs to be closed, input a pulse power supply to the valve closing (top) coil, and the solenoid valve will open. After the power is turned off, the solenoid valve remains closed. Double-coil solenoid valves are most suitable for working conditions with limited electrical energy and pipelines with high-temperature media. Self-retaining solenoid valve structure diagram Advantages and disadvantages of self-retaining solenoid valve 1. If there are large impurities in the medium, a filter needs to be installed in front of the valve. 2. The coil is charged instantly, which prevents traditional solenoid valves from being unable to work due to long-term charging of the coil that easily burns the coil. 3. There is no requirement for the flow direction of the medium. The two chambers of the solenoid valve are the inlet and outlet of each other. 4. Because of its straight-through structure, there is no requirement for media cleanliness. 5. There is no requirement for the working pressure of the inlet and outlet, and it can work normally within the pressure range of 0~2.5MPa. 6. This valve is entirely made of stainless materials to ensure good operation. 7. After installation, the top coil must be perpendicular to the ground (an inclination of 1° is allowed). 8. The coil must not come into contact with conductive objects, such as water, steel, etc. 9. The pressure, flow direction, viscosity, etc. of the medium must be operated in accordance with relevant regulations. Advantages: As mentioned at the beginning, low power consumption, power-off retention, pulse control, coil does not heat up, long life, easy maintenance, etc.;Disadvantages: 1. The double-coil self-maintaining solenoid valve is relatively large in size, especially in height. , not suitable for installation in low spaces;2. The cost is high, the valve has high processing precision, is large in size, and uses a double coil working system, so the cost is naturally higher than that of a single coil. The above is the working principle of the self-maintaining solenoid valve, and the structure diagram of the self-maintaining solenoid valve is introduced. If you want to know more related information, please log in to Sunway Pneumatic www.diancifa.cc to view.