Discussion on the development of solenoid valve technology

As a kind of actuator of automatic instrument, the consumption of solenoid valve has increased rapidly in recent years This paper analyzes the main characteristics of the solenoid valve, and focuses on the application of the perspective of the development of domestic mature technology briefly reviewed, respectively in the refined simplification, intelligent, general, specialized direction of inspection, and a brief discussion of the social factors affecting the development of the solenoid valve technology (1) external leakage is blocked, internal leakage is easy to control and safe to use Internal and external leakage is an element endangering safety Other automatic control valves usually extend the valve stem, and the electric, pneumatic and hydraulic actuators control the rotation or movement of the valve core All of these need to solve the leakage problem of long-term action valve stem dynamic seal; only the electromagnetic valve is completed by using the electromagnetic force to seal the iron core in the magnetic isolation sleeve, and there is no dynamic seal, so the leakage is easy to be blocked The torque control of electric valve is not easy, and it is easy to produce internal leakage, or even pull off the head of valve stem; the structure of solenoid valve is easy to control internal leakage until it is reduced to zero Therefore, the use of solenoid valve is particularly safe, especially suitable for corrosive, toxic or high and low temperature media (2) the system is simple, easy to connect computer, low price The structure of the solenoid valve itself is simple and the price is low Compared with other kinds of actuators such as control valve, it is easy to install and maintain What's more, the automatic control system is much simpler and much cheaper Because the solenoid valve is controlled by switch signal, it is very convenient to connect with industrial control computer In today's era of computer popularization and sharp price decrease, the advantages of solenoid valve are more obvious (3) action express, small power, light shape The response time of the solenoid valve can be as short as several milliseconds, and even the pilot solenoid valve can be controlled within tens of milliseconds Because of self-contained loop, it is more sensitive than other automatic control valves The properly designed solenoid valve coil has low power consumption, which is an energy-saving product; it can also be used to trigger action and automatically maintain the valve position without any power consumption at ordinary times The external dimension of the solenoid valve is small, which not only saves space, but also is light and beautiful