Direct-acting type axial flow electromagnetic valve

Abstract

The invention discloses a direct-acting type axial flow electromagnetic valve which comprises an inlet nozzle, a valve element gasket, a gland, a valve element, a coil framework, a shell, a moving armature, a static yoke and a spring. Fluid flows from the inlet nozzle into the gland through a fluid inflow channel on the inlet nozzle; when a coil is not powered on, under the effect of the elastic force of the spring, the front end of the valve element jacks the valve element gasket installed at the rear end of the inlet nozzle, and at the moment, the electromagnetic valve is in a closed state; after the coil is powered on, the moving armature is attracted by the static yoke to overcome the elastic force and drive the valve element to move backwards together, at the moment, the front end of the valve element is separated from the valve element gasket, a passage of the electromagnet valve is opened, the fluid flows into the valve element through the front end of the valve element via the fluid inflow channel, then flows into the static yoke and finally flows out of the rear end of the static yoke. By the adoption of the direct-acting type axial flow electromagnetic valve, the start electromagnetic force is small, the electromagnetic valve can be reliably opened under the condition of the large flow, and the flow resistance loss of the electromagnetic valve is small.

Description

technical field [0001] The solenoid valve field of the present invention is specifically a direct-acting axial flow solenoid valve. Background technique [0002] Electromagnetic valve is the most widely used and most important actuator and control element in the pipeline fluid conveying system, and it is an indispensable equipment in the control system. [0003] Solenoid valves have 5 major functions, such as connecting or cutting off fluid passages, regulating and throttling, preventing backflow, regulating pressure or releasing excess pressure, and are widely used in industrial production. Solenoid valves are used to control the flow of various types of fluids such as air, water, various corrosive chemical media, mud, liquid metal and radioactive substances. [0004] The control part of the solenoid valve can be divided into two types: direct-acting and pilot-operated according to its control form for the main valve. Dynamic type; if the reversing is realized by electrom...

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Problems solved by technology

[0006] However, the direct-acting control valve is limited by the size of the electromagnetic force. When the diameter of the valve core 4 is large or the inlet pressure is high, it needs a large electromagnetic force to start, so a large starting current is required, and the control current increases. Large, on the one hand, it increases the heat dissipation requirements of the coil; on the other hand, it is difficult for aerospace systems to provide large currents for a long time, thus restricting the widespread use of direct-acting solenoid valves

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