Preparation method of valve body with steel frame PE

Abstract

The invention relates to the technical field of valve bodies, in particular to a preparation method of a valve body with a steel frame PE. The preparation method of the valve body with the steel framePE comprises the following steps that S1, PE backing rings are fastened to two ends of a pre-prepared valve body steel frame, then the valve body steel frame and the PE backing rings are put into anoven with the constant temperature of 80 DEG C for preheating for a period of time; S2, the valve body steel frame and the PE backing rings are taken out from the oven and put into a PE valve body workblank injection mold by using a lifting machine, a left core and a right core of the mold are folded slowly, an assembly formed by the PE backing rings at the two ends and the valve body steel frameis compressed through the left and right cores, whether the PE backing rings hang the valve body steel frame in a mold core cavity on not is confirmed before mold closing; S3, injection molding is started after the mold closing, so that the valve body steel frame is wrapped by PE materials; and S4, after injection molding, the workblank is subjected to lathe machining, and the redundant PE backingrings are removed through the lathe machining. According to the preparation method of the valve body with the steel frame PE, the prepared valve body enables the voltage endurance capability and corrosion protection capability of the valve body to be effectively improved.

Description

technical field [0001] The invention relates to the technical field of valve bodies, in particular to a method for preparing a PE valve body with steel skeleton. Background technique [0002] At present, the steel-plastic composite ball valve can only be injected with a layer of PE anti-corrosion layer on the surface of the steel ball valve, and the inner layer cannot also be wrapped with a layer of PE anti-corrosion layer. Therefore, the current steel-plastic composite ball valve can only prevent the external environment from corroding the metal ball valve. It cannot prevent natural gas from corroding the inner layer of metal ball valves. [0003] In the prior art, the patent name is a stainless steel ball valve, application number: 201320164368.2, the main feature is that stainless steel is used for the structure of the ball valve shell, and the parts are assembled and welded after processing and forming; the disadvantages are high manufacturing cost, stainless steel valve...

AI Technical Summary

Problems solved by technology

[0002] At present, the steel-plastic composite ball valve can only be injected with a layer of PE anti-corrosion layer on the surface of the steel ball valve, and the inner layer cannot also be wrapped with a layer of PE anti-corrosion layer. Therefore, the current steel-plastic composite ball valve can only prevent the external environment from corroding the metal ball valve. It cannot prevent natural gas from corroding the inner layer of metal ball valves

[0003] In the prior art, the patent name is a stainless steel ball valve, application number: 201320164368.2, the main feature is that stainless steel is used for the structure of the ball valve shell, and the parts are assembled and welded after processing and forming; the disadvantages are high manufacturing cost, stainless steel valve body Die-casting molding technology is still a difficulty, this is a product that does not have market competitiveness

The patent name is a steel-plastic ball valve, application number: 201510577061.9, the main feature is that the steel ball valve has the advantage of anti-corrosion through the outer layer of PE layer to reach the outer layer, but the disadvantage is that the inner layer does not have anti-corrosion function

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