If the explosion-proof solenoid valve does not move, it needs to be investigated from several aspects.
1, import solenoid valve wiring head loose or thread off, solenoid valve can not be electricity, can fasten the thread.
2. The coil of the imported solenoid valve is burnt out. The connection of the explosion-proof solenoid valve can be removed and measured with a multimeter. If the circuit is open, the coil of the solenoid valve will burn out. The reason is that the coil is damped, resulting in poor insulation and magnetic leakage, resulting in excessive current in the coil and burning, so it is necessary to prevent rainwater from entering the solenoid valve. In addition, too hard spring, too large reaction force, too few coil turns, suction is not enough can also make the coil burned. In emergency treatment, the manual button on the coil can be pushed from the "0" position to the "1" position in normal operation, so that the valve can be opened.
3. Explosion proof solenoid valve stuck. The mating clearance between the sliding sleeve and the spool of solenoid valve is very small. Generally, they are assembled in one piece. When mechanical impurities are brought in or lubricants are too small, it is easy to get stuck. The processing method can be inserted into the small hole of the head by steel wire, so that it can bounce back. The fundamental solution is to remove the solenoid valve, remove the spool and the spool sleeve, and clean with CCI4, so that the spool can move flexibly in the valve sleeve. When disassembling, attention should be paid to the assembly sequence and external wiring position of each component in order to reassemble and wiring correctly, and check whether the oil spray hole is blocked and whether the lubricating oil is enough.
4, leakage. Leakage will cause insufficient air pressure, which makes the opening and closing of the forced valve difficult. The reason is that the sealing gasket is damaged or the sliding valve is worn out, resulting in several cavities channeling. When dealing with the fault of the solenoid valve in the switching system, the appropriate time should be chosen to deal with it when the solenoid valve is out of power. If the process is not completed in a switching gap, the switching system can be suspended and handled calmly.
These are the problems that we often encounter in our daily work and then come to a conclusion after sorting out.
