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Process for adjusting inner diameter size of polyethylene front winding electric melting pipe fitting

An electrofusion pipe fitting and size adjustment technology, which is applied to tubular articles, household appliances, other household appliances, etc., can solve the problems of inability to guarantee the quality of electrofusion welding, large inner diameter of electrofusion pipe fittings, and large gap between socket and socket assembly, etc. Production risk, improved welding quality, and the effect of reducing scrap output

Pending Publication Date: 2022-05-27
SHANDONG DONGHONG PIPE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a process for adjusting the inner diameter of polyethylene front-wound electric fusion pipe fittings, so as to solve the problems that the electric fusion pipe fittings with short natural aging treatment have large inner diameters, large socket assembly gaps, and the quality of electric fusion welding cannot be guaranteed.

Method used

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  • Process for adjusting inner diameter size of polyethylene front winding electric melting pipe fitting
  • Process for adjusting inner diameter size of polyethylene front winding electric melting pipe fitting
  • Process for adjusting inner diameter size of polyethylene front winding electric melting pipe fitting

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Embodiment

[0025] like figure 1 The injection molding process flow of the polyethylene electrofusion pipe fitting in the prior art is shown, and the shown is a relatively common process flow in the prior art, so the specific process steps thereof will not be repeated.

[0026] This embodiment provides a process for adjusting the inner diameter size of a polyethylene front-wound electrofusion pipe fitting, which is located at the end of the injection molding process, such as figure 2 shown, including:

[0027] When the inner diameter of the injection-molded electrofusion pipe fittings is larger than the standard value range of the unilateral fitting gap relative to the outer diameter of the pipe, the electrofusion pipe fittings whose inner diameter is not completely shrunk are subjected to constant temperature heating treatment, and then cooled to release the internal stress of the electrofusion pipe fittings. Shrink the inside diameter of electrofusion fittings.

[0028] Among them, t...

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Abstract

The invention belongs to the technical field of pipe fitting electric melting connection, and particularly relates to a polyethylene front winding electric melting pipe fitting inner diameter size adjusting technology. Carrying out constant-temperature heating treatment on the electric melting pipe fitting of which the inner diameter is not completely shrunk, then carrying out cooling treatment, releasing the internal stress of the electric melting pipe fitting, and shrunk the inner diameter size of the electric melting pipe fitting; real-time adjustment can be carried out according to the storage period and the outer diameter of the pipe, the matched inner diameter size of the electric smelting pipe fitting is controlled within the standard matched size, and the welding quality is improved.

Description

technical field [0001] The invention belongs to the technical field of pipe fittings electrofusion connection, in particular to a process for adjusting the inner diameter size of polyethylene front-winding electrofusion pipe fittings. Background technique [0002] At present, the use of PE (polyethylene) steel wire composite pipes for water supply and drainage is relatively common, and the low-pressure pipes are connected by electrofusion. Due to its convenient construction and high efficiency in the range of medium and small diameters, it is widely used in this field; [0003] For large-diameter PE steel wire composite pipes of dn630 and above, when the electrofusion connection is used, the welding quality of the fusion surface is directly related to the fitting gap between the pipe and the fitting. The molten PE molecules cannot be thermally expanded to the welding surface of the pipe, so that good welding cannot be achieved, and the quality of electrofusion welding cannot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C71/02B29L23/18
CPCB29C71/02B29L2023/00
Inventor 倪奉尧刘超孔伟川段井玉吴腾
Owner SHANDONG DONGHONG PIPE IND