Inner anti-oxidation argon filling protection method in welding process of pressure pipelines

Abstract

The invention discloses an inner anti-oxidation argon filling protection method in the welding process of pressure pipelines. According to the specific technical scheme, two pipeline openings needing to be welded are well assembled, and argon conveying pipes are plugged into the two pipelines respectively; two blocking latex balloons are fed into the two pipelines respectively; gas is supplied to the blocking latex balloons through an inflator pump and a gas guide pipe; a circle of high temperature resistance adhesive tape is wound on each pipeline opening needing to be welded, an exhaust port is reserved in the top of a welded junction, after argon is filled for a certain period of time, a matchstick is ignited at the exhaust port which is reserved in the welded junction, the burning matchstick can go out immediately, and accordingly welding can be conducted. The inner anti-oxidation argon filling protection method in the welding process of the pressure pipelines is easy, convenient and fast to operate, in the using process, the argon using amount can be effectively reduced, meanwhile, an oxygen-free environment can be provided, so that the welding quality is improved, and the repair rate and the cost are lowered.

Description

[0001] technical field [0002] The invention relates to the technical field of pressure pipeline welding, in particular to an internal anti-oxidation argon filling protection method for pressure pipeline welding, which is used for pressure pipeline welding. Background technique [0003] In the construction of pressure pipelines in the existing metallurgical and chemical industries, the pipeline needs to be filled with inert gas (usually argon) for protection to prevent the weld seam in the pipeline from being oxidized during the welding process. When welding a general pipeline, the amount of argon gas filled in the pipeline is the entire pipeline , In this way, in the construction, especially in the construction of public and auxiliary pipelines, the amount of argon used is quite large, which increases the entire construction cost a lot. At the same time, the pipeline is long, which cannot ensure the stability of the gas concentration and reduces the quality of the weld. C...

AI Technical Summary

Problems solved by technology

[0003] In the construction of pressure pipelines in the existing metallurgical and chemical industries, the pipeline needs to be filled with inert gas (usually argon) for protection to prevent the weld seam in the pipeline from being oxidized during the welding process. When welding a general pipeline, the amount of argon gas filled in the pipeline is the entire pipeline In this way, in the construction, especially in the construction of public and auxiliary pipelines, the amount of argon used is quite large, which increases the entire construction cost a lot. At the same time, the pipeline is long, which cannot ensure the stability of the gas concentration and reduces the quality of the weld.

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