What is the use of solenoid valve? Common faults of pneumatic solenoid valve

What are the uses of solenoid valves? Solenoid valves are basic equipment that rely on electromagnetic force to automatically switch. Their main function is to control the automation of objects. They are executive components and are used to regulate the direction, flow, speed and other parameters of the medium in industrial control systems. , widely used in various fields of production. Since there is a coil in the solenoid valve, when current passes through it, electrical and magnetic conversion occurs. Under the action of magnetic force, the valve body produces corresponding actions. The two-position two-way solenoid valve has one inlet and one outlet;the two-position three-way solenoid valve controls the liquid through one inlet and two outlets;the pneumatic reversing solenoid valve has one inlet, one outlet and one exhaust;the hydraulic one has one inlet, one outlet and one oil return. Types of solenoid valves: pulse solenoid valve, high temperature solenoid valve, explosion-proof solenoid valve, high pressure solenoid valve, vacuum solenoid valve, steam solenoid valve, water solenoid valve, gas solenoid valve, liquid solenoid valve, gas solenoid valve, fire solenoid valve, Normally open solenoid valve, normally closed solenoid valve, universal solenoid valve, direct-acting solenoid valve, pilot-operated solenoid valve, stainless steel solenoid valve, two-position three-way solenoid valve, three-position five-way solenoid valve, etc. Common faults of pneumatic solenoid valves 1. The wiring joint of the pneumatic solenoid valve is loose or the threads fall off. The pneumatic solenoid valve must not be powered, and the threads can be tightened. 2. If the pneumatic solenoid valve coil is burned out, you can remove the wiring of the pneumatic solenoid valve and measure it with a multimeter. If there is an open circuit, the solenoid valve coil is burned out. The reason is that the coil is damp, causing poor insulation and magnetic leakage, causing excessive current in the coil and burning. Therefore, rainwater must be prevented from entering the solenoid valve. In addition, if the spring is too hard, the reaction force is too large, the number of coil turns is too few, and the suction force is not enough, the coil may be burned. During emergency treatment, the manual button on the coil can be moved from the "0" position during normal operation to the "1" position to open the valve. 3. The pneumatic solenoid valve is stuck. The matching gap between the slide valve sleeve and the valve core of the pneumatic solenoid valve is very small (less than 0.008mm). It is usually assembled in a single piece. When mechanical impurities are brought in or there is too little lubricating oil, it is easy to get stuck. live. The treatment method can be to insert a steel wire through the small hole in the head to make it bounce back. The fundamental solution is to disassemble the solenoid valve, take out the valve core and valve core sleeve, and clean it with CCI4 to make the valve core move flexibly in the valve sleeve. When disassembling, attention should be paid to the assembly sequence of each component and the position of external wiring so that reassembly and wiring are correct. Also check whether the oil spray hole of the lubricator is blocked and whether the lubricating oil is sufficient. 4. Air leakage in the pneumatic solenoid valve will cause insufficient air pressure, making it difficult to open and close the forced valve. The reason is that the sealing gasket is damaged or the slide valve is worn, causing air leakage in several cavities. When dealing with the fault of the pneumatic solenoid valve of the switching system, you should choose the appropriate time to deal with it when the solenoid valve is out of power. If it cannot be processed within a switching gap, the switching system can be paused and dealt with calmly. Common faults of pneumatic solenoid valves include burnt out coil of solenoid valve, stuck foreign matter in the solenoid valve core, and wear of the sealing ring of the solenoid valve core. The small air holes around the pneumatic solenoid valve body are blocked. Fault diagnosis and treatment of pneumatic solenoid valve If the valve suddenly does not move, after inspection, it is not the cause of the valve itself, then check the solenoid valve. First, manually press the switch button on the solenoid valve to see if the solenoid valve can ventilate or not. Remove and clean the inside of the solenoid valve body and the switch button. Check the solenoid valve coil. After powering on, insert a metal object into the coil hole. If it cannot be sucked, measure whether there is power. If there is no power, check and deal with it. If there is, replace the solenoid valve coil. Check whether the air source pressure is above 0.2MPA, then check the air source and adjust the air filter pressure reducing valve to increase pressure. Note that you should be extra careful when repairing pneumatic solenoid valves. Since some solenoid valve coils are 220V, you should check them clearly before handling to avoid electric shock. The above is what the solenoid valve is used for, and the common faults of pneumatic solenoid valves are introduced. If you want to know more relevant information, please log in to Sunway Pneumatic www.diancifa.cc.