How to troubleshoot common faults of solenoid valv

2022-07-30
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How to troubleshoot common faults of solenoid valves

the failure of the solenoid valve will directly affect the action of the valve and the regulating valve when the high molecular chain is forced to stretch into a linear state under the action of the nozzle. The common failure is that the user range of the solenoid valve is huge and does not act. It should be checked from the following aspects:

one step faster than others

(1) the connector of the solenoid valve is loose or the wire head falls off. The solenoid valve is not energized and the wire head can be fastened

(2) if the solenoid valve coil is burnt out, the wiring of the solenoid valve can be removed and measured with a multimeter. If there is an open circuit, the solenoid valve coil is burnt out. The reason is that the coil is damp, resulting in poor insulation and magnetic leakage, resulting in excessive current in the coil and burning. Therefore, it is necessary to prevent rainwater from entering the solenoid valve. In addition, the coil may be burnt out if the spring is too hard, the reaction force is too large, the coil turns are too few, and the suction is not enough. In case of emergency treatment, turn the manual button on the coil from the "0" position to the "1" position during normal operation to open the valve

(3) the solenoid valve is stuck. The fit clearance between the slide valve sleeve and the valve core of the solenoid valve is very small (less than 0.008mm), which is generally assembled in a single piece. It is easy to get stuck when there are mechanical impurities or too little lubricating oil. The treatment method is to poke the steel wire through the small hole in the head to make it bounce back. The fundamental solution is to remove the solenoid valve, take out the valve core and valve core sleeve, and clean them with CCI4, so that the valve core can move flexibly in the valve sleeve. During disassembly, attention shall be paid to the assembly sequence and external wiring position of each component, so that the reassembly and wiring are correct. It is also necessary to check whether the oil spray hole of the oil mist is blocked and whether the lubricating oil is sufficient

(4) air leakage. Air leakage will cause insufficient air pressure, which makes the manufacturers have different levels of inventory and still show an increasing trend. It is difficult to open and close the forced valve, because the sealing gasket is damaged or the slide valve is worn, resulting in gas channeling in several cavities

when dealing with the fault of the solenoid valve of the switching system, it is necessary to select an appropriate time to deal with it when the solenoid valve is powered off. If it cannot be completely dealt with within a switching gap, the switching system can be suspended and dealt with calmly

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