Application of water-soluble paper to argon arc welding of long-distance industrial pipeline intermediate joint collision port

Abstract

The invention discloses an application of water-soluble paper to argon arc welding of a long-distance industrial pipeline intermediate joint collision port. The application is characterized by comprising the following steps that a, two pieces of water-soluble paper (1) with the diameter larger than the pipe diameter by 100-200 mm are prepared according to the pipe diameter of pipelines; b, one piece of water-soluble paper (1) is adhered inside the corresponding pipeline (2) by using glue (4); c, one piece of water-soluble paper (1) of the two pieces of water-soluble paper is provided with an exhaust hole (3); d, a paper adhesive tape (5) is used for completely sealing a joint gap of the whole pipelines (2), and a copper pipe (8) connected with an argon strip (9) is used at the gap to fillthe pipelines (2) with argon; and e, welding is carried out when the concentration of the argon inside the pipelines (2) is detected to reach 99.9% by using an instrument. The application has the advantages that for the arrangement of the water-soluble paper in the pipelines, the measure is simple, the construction is convenient, when welding of a long-pipe-section pipeline collision port is carried out, the argon filling protection can be conveniently and rapidly completed, the pipeline welding quality is effectively guaranteed, and the engineering cost is reduced.

Description

technical field [0001] The invention relates to argon arc welding of pipelines, in particular to the application of water-soluble paper in argon arc welding of intermediate joints of long-distance industrial pipelines. Background technique [0002] In the process of argon arc welding, traditional industrial pipelines are filled with argon to protect the entire pipeline. The cost is too high. During the construction process, circular sealing discs made of sponge and argon tubes are often used to form a device, which is sealed by dragging. The inner narrow space of the weld is filled with argon. Therefore, such gas shielded pipeline welds are usually welded one by one from one end to the other, and the effect of filling the pipeline with argon is achieved by dragging the circular sealing disc group made of sponge, which is filled with argon from the inside of the pipeline . However, this method has great difficulty in the collision of two long-distance pipelines or the unqua...

AI Technical Summary

Problems solved by technology

However, this method is very difficult for two long-distance pipelines to collide or to cut and re-weld some unqualified pipeline welds.

In recent years, water-soluble paper is pasted inside the pipeline for argon filling protection, and argon is filled from the outside of the pipeline to fill the gap between the openings. Howe

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