Electromagnet for flame-proof valve

Abstract

The invention discloses an electromagnet for a flame-proof valve, comprising a housing whose shell structure is designed into boss shape, wherein the inner thread on the upper part of the housing is screwed with a thread base, the inner cavity of the thread base is provided with a seal element, the upper part of the seal element is provided with a stringing lock block, the outer thread on the upper part of the thread base is screwed with a stringing nut, and the junction of the upper part of the housing and the thread base is provided with a third O-shaped seal ring. When the stringing nut is screwed, a three-core cable and relevant parts are fully sealed and flame-proof due to deformation of the seal element; the middle of the boss-shape housing is provided with a coil component, the left side and the right side are provided with an upper magnet yoke and a lower magnet yoke, the inner bore of the coil component is provided with a magnetic core tube component, and the connection of the electromagnet and the hydraulic directional control valve adopts a mode of thread direct connection so as to obtain convenient and reliable connection; the gap between an armature and guide bushing periphery is provided with magnetic shield cloth which performs the magnetic shield function to emitted magnetic lines of force; and a housing welding line is respectively detected by X rays in a perspective mode and has favourable flame-proof property through a hydrostatic test.

Description

technical field [0001] The invention relates to the technical field of coal mining machinery, in particular to an electromagnet for a flameproof valve. Background technique [0002] At present, the explosion-proof valve electromagnets put into use mainly have the following problems: there is no magnetic isolation measure at the gap between the guide sleeve and the armature, and the characteristic curve effect of force and stroke is poor, which seriously affects the overall working performance of the electromagnet; The connection form of the valve body is fixed by four screws, which is cumbersome to install and maintain and the reliability of the connection is poor; the design of the jacket is a cuboid structure, which is troublesome to process and takes up a lot of space; the seal is made of ordinary rubber and has a boss shape, which is resistant to aging The performance is poor, and after being compressed by the compression nut, the sealing performance after compression is...

AI Technical Summary

Problems solved by technology

[0002] At present, the explosion-proof valve electromagnets put into use mainly have the following problems: there is no magnetic isolation measure at the gap between the guide sleeve and the armature, and the characteristic curve effect of force and stroke is poor, which seriously affects the overall working performance of the electromagnet; The connection form of the valve body is fixed by four screws, which is cumbersome to install and maintain and the reliability of the connection is poor; the design of the jacket is a cuboid structure, which is troublesome to process and takes up a lot of space; the seal is made of ordinary rubber and is in the shape of a boss, which is resistant to aging The performance is poor, and after being compressed by the compression nut, the sealing performance after compression is poor due to its structural reasons; when connecting the power input line, the clamping piece must be removed first, and the compression nut, sealing block, sealing gasket and isolation It is more troublesome to cover and other parts; the electromagnetic coil is made of ordinary enameled wire, which has poor high temperature resistance; in view of the above factors, it is imminent to develop a new generation of explosion-proof valve electromagnets.

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