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Welding method of polyethylene (PE) gas valve

A welding method and gas valve technology are applied in the field of welding, which can solve the problems affecting the installation of matching vent pipes, large size deviation, etc., and achieve the effects of ensuring the quality of welding seams, improving welding efficiency, and ensuring the consistency of installation.

Active Publication Date: 2013-06-05
HENAN LIANSU IND
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Problems solved by technology

[0002] With the development of scientific and technological productivity, polyethylene (PE) gas valves are more and more widely used in gas transmission pipelines, and become an important part of gas transmission pipelines. The welding quality between its components is directly related to the safety of the entire gas transmission pipeline. At present, the PE gas valve (release type) is welded on one side and one end of the plane. During the welding process, the size after welding is controlled by the pressure. This welding method has a large size deviation after welding, which affects the installation of the supporting release pipe.

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Embodiment Construction

[0009] The present invention will be further described below in conjunction with the accompanying drawings.

[0010] Such as figure 1 , figure 2 As shown, the welding hot molds 51, 52, 53, 54 are made into conical surfaces like the welding surfaces of the end pipe assemblies 2 and 3, and the angle of the conical surfaces is consistent with the angle of the welding surface of the welding components. Adhesion, Teflon coating on the surface of the welding hot mold; the welding hot mold executes the program setting action at the left, right and upper ends of the welding machine at the same time, and the welding hot mold welding surfaces 61, 62, 63, 64 and the end pipe assembly The welding surfaces 67, 68 and the valve body assembly 4 welding surfaces 66, 65 are bonded, the welding surfaces of the welding hot molds 55, 56 are bonded to the valve upper seat assembly 1 welding surface, and the valve body assembly welding surface, and mechanical limit is adopted during hot melting ...

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Abstract

The invention discloses a welding method of a polyethylene (PE) gas valve. A first end pipe assembly, a second end pipe assembly, a valve upper seat assembly, and a valve body assembly conical surface corresponding end are welded at the same time. Mechanical limiting is adopted for fit hot melting of a hot mold conical surface and an assembly welding face to limit the linear movement distance of the hot melting. Compared with the prior art, the welding method of the PE gas valve has the advantages that three ends of the gas valve are welded at the same time, and welding efficiency is greatly improved; and the mechanical limiting is adopted to accurately control thickness of a welding layer in a welding process, quality of welding joints of the welded valve is guaranteed, size of the welded valve is controlled, and installation consistency of a matched bleeder is effectively guaranteed.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a welding method for a PE gas valve. Background technique [0002] With the development of scientific and technological productivity, polyethylene (PE) gas valves are more and more widely used in gas transmission pipelines, and become an important part of gas transmission pipelines. The welding quality between its components is directly related to the safety of the entire gas transmission pipeline. At present, the PE gas valve (diffusion type) is welded on one side and one end. During the welding process, the size after welding is controlled by the pressure. This welding method has a large size deviation after welding, which affects the installation of the matching discharge pipe. Contents of the invention [0003] In order to solve the deficiencies in the above-mentioned prior art, the present invention provides a welding method for PE gas valves with high production efficien...

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Application Information

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IPC IPC(8): B29C65/02
Inventor 何永胜常鹏
Owner HENAN LIANSU IND
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