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Multi-layer corrugated pipe welding joint

A technology for welding joints and bellows, which is applied in welding equipment, arc welding equipment, edge parts of workpieces, etc., can solve the problems of unqualified welding penetration, excessive porosity, and excessive helium leak detection rate of a single weld, so as to ensure qualified rate, the effect of improving the density

Inactive Publication Date: 2017-12-05
JIANGSU BAOJINLAI PIPELINE EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the present invention proposes a multilayer corrugated pipe welded joint that can solve the problems of excessive air holes, unqualified welding penetration, and excessive helium leak detection rate of a single weld seam in the multilayer corrugated pipe welded joint.

Method used

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with embodiment.

[0012] The welded joints of multi-layer corrugated pipes are butt-welded structures, which are welded by seam welding + fusion welding: first, seam-weld the joints of multi-layer bellows pipes and the joints of unequal thickness together to seal, and reserve the welding boss as filler wire, and then It is welded with straight pipe by pulse automatic argon arc welding.

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Abstract

The invention discloses a multi-layer corrugated pipe welding joint of a butt welding structure. The processes of roll welding and fusion welding are adopted for welding, specifically, firstly, multi-layer corrugated pipe joints and joints with unequal thicknesses are roll-welded together to be sealed, welding bosses are reserved for welding wire filling, and then fusion welding is conducted with straight pipes through pulse automatic argon arc welding. By adopting the multi-layer corrugated pipe welding joint, the situation that air holes exceed the standard can be avoided, and meanwhile the qualification rates of welding penetration and product helium mass spectrum leak detection can be guaranteed.

Description

technical field [0001] The invention relates to a welding joint, in particular, the invention relates to a bellows welding joint. Background technique [0002] Some bellows compensators are welded by welded joints at both ends of multi-layer bellows. The welded joints of this multi-layer bellows are prone to problems such as excessive porosity, unqualified welding penetration, and excessive helium leak detection rate of a single weld. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the present invention proposes a multilayer corrugated pipe welded joint that can solve the problems of excessive pores, unqualified welding penetration, and excessive helium leak detection rate of a single weld. [0004] The present invention achieves technical goals through the following technical solutions. [0005] The improvement of the welded joint of the multilayer corrugated pipe lies in that it is a butt welded structure. [0006] In the above structure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K33/00B23K9/173
CPCB23K9/173B23K33/00
Inventor 刘根喜
Owner JIANGSU BAOJINLAI PIPELINE EQUIP