场景化应对——不同工况下电磁阀故障解析与解决方案

Scenario based response - analysis and solutions for electromagnetic valve faults under different working conditions

The working conditions of solenoid valves directly affect their fault types and frequency of occurrence. Under different media, pressure, and temperature environments, the risk of loss faced by solenoid valves varies greatly. Targeted analysis of the fault characteristics under different working conditions and the development of adaptive solutions can effectively improve the efficiency of fault handling and avoid the recurrence of similar problems. Whether it is a corrosive medium environment, high temperature and high pressure working conditions, or frequent start stop scenarios, it is necessary to optimize the fault response strategy based on the characteristics of the working conditions.

In corrosive medium conditions (such as chemical wastewater and acid-base solution transportation), solenoid valves are most prone to valve body corrosion, aging and damage of seals, and stuck valve cores. Corrosive media will gradually erode the metal material of the valve body, causing thinning and leakage of the valve body wall thickness, while accelerating the aging of the sealing components, resulting in medium leakage. When solving such faults, it is necessary to replace the solenoid valve with corrosion-resistant materials, such as stainless steel or polytetrafluoroethylene valve body and seals, to avoid the failure of ordinary materials due to corrosion. Regularly check the degree of corrosion on the valve body, perform anti-corrosion treatment on slightly corroded areas, and replace the valve body directly in case of severe corrosion. At the same time, optimize the media filtration process to prevent corrosion impurities from accumulating on the valve core and exacerbating the problem of jamming.

In high temperature and high pressure conditions (such as steam systems and industrial boiler matching), solenoid valves often experience faults such as coil overheating and burnout, valve core sealing failure, and valve body deformation. High temperature environment will accelerate the aging of the insulation layer of the coil, reduce the voltage resistance performance, and easily cause short circuit burning; High pressure will intensify the wear of the valve core and valve seat, leading to an increase in sealing clearance and leakage. When solving the problem, choose electromagnetic valves with high temperature and high pressure resistance specifications, and the coil should be equipped with a heat dissipation structure to avoid long-term high temperature operation; The sealing components are made of high temperature and high pressure resistant materials, such as fluororubber. The wear of the sealing components should be checked regularly and replaced in a timely manner. At the same time, the control system pressure is within the rated range of the solenoid valve, and a pressure relief device is installed to prevent the valve body from deforming due to excessive pressure. The valve core and seat are regularly ground and maintained to ensure sealing performance.

In frequent start stop operating conditions (such as automated production lines, frequent switching of fluid circuits), solenoid valves are prone to valve core wear, fatigue of reset springs, and poor coil contact faults. Frequent opening and closing actions will intensify the friction between the valve core and the valve seat, leading to wear and poor sealing of the valve core. The reset spring will experience elastic attenuation due to long-term repeated expansion and contraction, and cannot drive the valve core to reset. The coil wiring terminals will also become loose and have poor contact due to frequent vibration. When solving the problem, choose wear-resistant and fatigue resistant solenoid valve components, use hardened materials for the valve core, use high-strength elastic materials for the reset spring, regularly check the spring elasticity, and replace it in a timely manner when it fails. Tighten the coil wiring terminals, install anti vibration fixing devices to reduce the impact of vibration on the circuit, and regularly apply special lubricating grease to the valve core to reduce friction loss and extend its service life.

In low-temperature operating conditions (such as refrigeration systems and outdoor low-temperature environments), solenoid valves may experience valve core freezing, coil insulation layer embrittlement, and seal hardening failures. Low temperature can cause moisture in the medium to freeze, jamming the valve core and preventing normal opening and closing; At the same time, it makes the insulation layer of the coil brittle and prone to cracking, and the sealing element hardens and loses its elasticity, causing leakage. When solving the problem, install insulation devices on the solenoid valve to prevent the medium from freezing, and if necessary, equip heat tracing equipment to maintain the valve body temperature within the normal range; Select low-temperature compatible seals and coils, regularly check the integrity of the insulation layer to prevent embrittlement and damage. After shutdown, promptly discharge the residual medium in the valve body to avoid damage to the valve core caused by low-temperature icing. Preheat the valve body before starting to ensure the normal operation of the components.

#Fault of working condition type solenoid valve # Scenario based maintenance of solenoid valve # Maintenance of corrosion-resistant solenoid valve