solenoid valve as an actuator of automation instrument, consumption has risen dramatically in recent years. The main characteristic of this paper analyzes the electromagnetic valve, and the Angle of domestic mature technology focusing on the application of development are reviewed, in leaner, intelligent, generalization, specialty direction for investigation, and slightly to the social factors affecting the development of electromagnetic valve technology points discussed. The main characteristics of a, the electromagnetic valve ( 1) System is simple, and the computer, the price is low. Electromagnetic valve itself has simple structure, low price, compared with the control valve and other kinds of actuators is easy to install and maintain. More significant is composed of automatic control system is much simpler, much lower prices. Because the electromagnetic valve is switch signal control, connection with industrial control computer is very convenient. In today's computers, prices plunged, the advantage of the solenoid valve is more obvious. ( 2) Leakage blocking, internal leakage is easy to control, the use of safe. The elements of internal and external leakage is unsafe. Other automatic control valve stem, is usually performed by the electric, pneumatic, hydraulic control valve core rotation or movement. This will solve the long-term movement stem dynamic seal leakage problem; Only the electromagnetic valve is applied to seal in electric magnetic magnetic core of casing is completed, there is no dynamic seal, so leakage blocking off easily. Electric valve torque control is not easy, easy to produce internal leakage, even to break the stem head; Within the structure is easy to control electromagnetic valve leakage, until reduced to zero. So, electromagnetic Industrial Valves using a special security, especially suitable for corrosive, toxic, or high and low temperature medium. ( 3) Action express, tiny power, appearance and lighter. Electromagnetic valve response time can be short as a few milliseconds, even the guiding type solenoid valve can control in a few milliseconds. Because of its circuit, more sensitive than other automatic control valve of the reaction. Design of electromagnetic valve coil power consumption is low, energy-saving products; Can also be simply trigger action, keep the valve position automatically, no electricity at ordinary times. Electromagnetic valve size shape, save a space already, and light and beautiful. ( 4) Type diversity, wide range of USES. Solenoid valve is congenitally deficient, advantage is still outstanding, so he designed a variety of products, meet the needs of different, use very extensive. Solenoid valve technology advances are also revolve around how to overcome the deficiency, how to better play to the inherent advantages. ( 5) Adjust precision limited, limited suitable medium. Electromagnetic Industrial Valves, usually only two state switch valve core is only in the two limit position, not continuous adjustment, Tries to break a lot of new conception, but also in the test trial stage) So the adjustment accuracy is limited. Solenoid valve has higher requirements to the cleanliness of medium, medium containing granular not applicable, must be filter for impurities. In addition, a viscous medium not applicable, and shall be applicable to the specific products of medium viscosity range is relatively narrow. Second, the development of electromagnetic valve technology introduction more streamlined solenoid valve technology direction to the development of fine to Jane, only simple can long ago. This is the permanent pursuit of scientists and engineers. ( 1) Simplify the control circuit is used in great quantities in the previous actuator pneumatic and electric control circuit, which increase the complexity of the system, while straight-pilot solenoid valves in the valve formation using control circuit of working medium itself, structure is simple. At home and abroad in the past, electromagnetic valve, a number of technical parameters also restricted now has extended to 30 domestic electromagnetic valve size omm; Low to medium temperature - - - - - - - 200 ℃ to 450 ℃. Work pressure from vacuum to 25 mpa. Action time from 10 seconds to a few milliseconds. The new development of these technologies has been completely can replace original bulky expensive two quick cut-off valve and pneumatic control switch valve, electric switch valve, also can partly replace the continuous adjustment of pneumatic, electric control valve. ( How to better meet the accuracy requirement, and above and below) 。 Foreign textile, light industry, urban construction and other industries have a large number of switch electromagnetic valve, and industries such as metallurgy, chemical industry, take the lead in more and more solenoid valve used in the auxiliary system. Domestic autonomous professional and technical personnel has more and more attention to the electromagnetic valve. ( 2) Simplified piping system automatic control Industrial Valves to work on the tube road must also with some auxiliary valve and pipe fittings. The piping system of space is large, the installation and time-consuming, also easy to leak. ZDF series multi-function solenoid valve cleverly omitted these attachments plus still has the function of isolation bypass and thus won the Geneva international new technology exposition. In the front of the automatic control valve should be equipped with filters. Used in combination with multiple control valve also often need to install the check valve to prevent interference between the pipes. Now, one way solenoid valve, solenoid valve and solenoid valve with filtering have played a role in simplifying piping.

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