Pipe welding arc-shaped liner device

Abstract

The invention relates to a pipe welding arc-shaped liner device. According to the aim, a liner device which can be used for improving the welding quality during pipe construction is provided. The pipewelding arc-shaped liner device is characterized by comprising six sets of head support opening alignment components, a head liner guide and push component, a middle barrel rod connecting component and a tail push and pull positioning component; each set of head support opening alignment components comprises a fixed jackscrew, a wearable steel ball, a plurality of distance adjusting gasket, a steel ball barrel and a steel ball base; the head liner guide and push component comprises a support barrel, a sliding ring, a compression spring, a fixing ring, a guide rail rod, a sliding support, an arc-shaped liner, a limiting bolt and a nut; the middle barrel rod connecting component comprises a connecting barrel, a barrel coupling, a connecting rod and a rod coupling, and the middle barrel rodconnecting component is used for connecting the head and the tail of the device and transmitting rotation or push-and-pull motion of the tail; and the tail push and pull positioning component comprises a push-and-pull handle and a clamping reed.

Description

technical field [0001] The invention relates to a welding backing device, in particular to an arc-shaped backing device used in pipeline construction for improving welding quality. Background technique [0002] During pipeline construction, except for super-large-diameter pipelines that can enter people, due to the limitation of conventional pipeline diameters, personnel cannot enter the pipeline for welding, and can only perform single-sided welding on the outside, which may easily cause unwelded welds on the inner wall of the pipeline. Defects such as penetration and weld bumps affect the quality of welds. [0003] The welding backing technology is to attach a ceramic or copper backing to the back of the weld to seal the welding groove when performing single-sided welding, thereby constraining the shape of the welding pool, forming a good weld quality, and avoiding welding seams. Defects such as incomplete penetration and weld bumps appear. Welding liner technology needs...

AI Technical Summary

Problems solved by technology

However, these liner devices all have some shortcomings, some of which can only be used in large-diameter pipes, some liners are troublesome to disassemble, and some cannot be adjusted arbitrarily with changes in pipe diameters

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