What are the characteristics and development dynamic analysis of solenoid valves?

As a kind of actuator of automatic instrument, the amount of solenoid valve has risen sharply in recent years. This article analyzes the main characteristics of solenoid valves, and focuses on the application of
A brief overview of the development trends of domestic mature technologies from the angle of view, respectively, in the direction of simplification, intelligence, generalization, and specialization.
Discuss the social factors that affect the development of 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 that endangers safety. Other automatic control valves usually extend the valve stem, and the rotation of the valve core is controlled by electric, pneumatic, and hydraulic actuators.
Or move. This must solve the problem of external leakage of the long-term action valve stem dynamic seal; only the solenoid valve is sealed in the magnetic isolation sleeve with electromagnetic force
The iron core is completed, there is no dynamic seal, so the leakage is easy to be blocked. The torque control of the electric valve is not easy, and it is easy to cause internal leakage, and even pull off the valve stem head;
The structure of the solenoid valve is easy to control internal leakage until it drops to zero. Therefore, the solenoid valve is particularly safe to use, especially suitable for corrosive and toxic
Or high and low temperature media.
(2) The system is simple, just connect to the computer, and the price is low.
The solenoid valve itself has a simple structure and a low price. It is easier to install and maintain than other types of actuators such as control valves. What is more remarkable is the self-contained
The control system is much simpler and the price is much lower. Since the solenoid valve is controlled by a switch signal, it is very convenient to connect with an industrial computer. In today's electricity
Brain
And, in the era of sharp price drop, the advantages of solenoid valves are even more obvious.
(3) Express action, small power and light appearance.
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. Since it is a self-contained circuit, compared to
Its automatic control valve is more sensitive. A properly designed solenoid valve coil has very low power consumption and is an energy-saving product; it can also be used to automatically protect the
Holds the valve position and consumes no electricity at all. The solenoid valve is small in size, which saves space and is light and beautiful.
(4) The adjustment accuracy is limited and the applicable medium is limited.
Solenoid valves usually have only two states on and off, and the spool can only be in two extreme positions and cannot be adjusted continuously. (There are many new ideas trying to break through, but
All are still in the trial stage) so the adjustment accuracy is still subject to certain restrictions.
Solenoid valves have higher requirements for the cleanliness of the medium, and the granular medium cannot be used. If it is impurities, it must be filtered out first. In addition, viscous media cannot
Applicable, and the medium viscosity range for specific products is relatively narrow.
(5) Diverse models and wide applications.
Although solenoid valves have inherent shortcomings, their advantages are still outstanding, so they are designed into a variety of products to meet various needs and are extremely useful.
widely. The advancement of solenoid valve technology also revolves around how to overcome congenital shortcomings and how to make better use of inherent advantages.