Solenoid valve, its manufacturing method and screw assembly

Abstract

The invention discloses a bolt assembly for connecting a solenoid valve body with a coil part, wherein the bolt assembly comprises a bolt body and a plastic bolt cap; the plastic bolt cap and the bolt body are integrally molded together by injection; the bolt body is inserted to the valve body and a bolt hole of the coil part; and a first annular containing part, which is provided with a slot port towards the coil part and used for placing a sealing part, is molded on the bottom of the plastic bolt cap by injection. The first annular containing slot for placing the sealing part is formed on the bolt assembly; the sealing part is tightly pressed between a magnetizer and the plastic bolt cap for sealing; when the solenoid valve is in the environments including a salt mist environment, a moisture environment and the like, the salt mist and the moisture cannot enter the bolt hole, so that the welding seam of the valve body is not corroded, and therefore, the corrosion resistance of the solenoid valve is improved; and moreover, the first annular containing slot can be formed by one step in a process of molding the plastic bolt cap and the bolt body by injection due to the plastic material of the plastic bolt cap, so that the bolt assembly is easy to machine and lower in production cost. The invention further discloses a solenoid valve and a manufacturing method thereof.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a screw assembly for connecting a solenoid valve body and a coil part. The present invention also relates to a solenoid valve comprising the above-mentioned screw assembly and a manufacturing method thereof. Background technique [0002] See figure 1 , figure 1 It is a structural sectional view of a solenoid valve in the prior art. [0003] A solenoid valve generally has a valve body 12 and a coil component 11 , and the coil component 11 has a coil 111 and a magnetizer 112 located on the outer periphery of the coil 111 . During installation, the coil component 11 covers the shell 121 of the valve body 12 , and screws 13 are used to fix the valve body 12 and the coil component 11 . Such as figure 1 As shown, the valve body 12 and the magnetizer 112 are processed with corresponding screw holes, and the nail body of the screw 13 is screwed into the screw holes of the coil...

AI Technical Summary

Problems solved by technology

[0006] Solenoid valves produced in the prior art can only be used in general use environments, and cannot meet the harsh conditions of use environments. Similarly, in refrigeration pipelines such as seagoing ships, solenoid valves are in salt spray and moisture environments, and are corrosive Stronger, the binding force between the galvanized layer and the low carbon steel is poor, after the galvanized layer is corroded, the corrosion of the matrix of the magnetizer 112 is accelerated

Moreover, the coating is zinc. When the solenoid valve is in the environment of salt spray and moisture, it will form galvanic corrosion with the valve seat 122 (generally made of brass material), which will reduce the corrosion resistance.

Corrosion of the magnetic conductor 112 will affect the magnetic conduction effect of the magnetic conductor 112, resulting in higher temperature rise, lower operating performance, and failure of the solenoid valve.

Images