Butt welding auxiliary device and construction method for single-side welding and double-side forming of small-diameter round pipes

Abstract

The invention discloses a butt welding auxiliary device and a construction method for single-sided welding and double-sided forming of a small-caliber circular tube. The auxiliary device includes a main frame, a ceramic liner, a main limit device and an auxiliary limit device, and the main frame includes a support tube. and a liner frame arranged in the middle of the support tube, the ceramic liner is fixed on the liner frame, the main limiting device and the secondary limiter are both arranged on the support tube and located on both sides of the liner frame. The construction method uses an auxiliary device to fix the ceramic liner on the inside of the welding seam of the first round pipe and the second round pipe. The invention does not require operators to enter the round pipe, overcomes the size limitation of the small-diameter round pipe, has a high degree of assembly, and improves the efficiency of welding construction.

Description

technical field [0001] The invention relates to the technical field of small-diameter round pipe single-side welding and double-side forming butt welding construction technology, and more specifically, relates to a small-diameter round pipe single-side welding and double-side forming butt welding auxiliary device and construction method. Background technique [0002] In the welding construction of steel structures, for some special-shaped parts to be welded (such as boiler pressure vessel components), the double-sided welding process cannot be used, and only the welding technology of single-sided welding and double-sided forming can be used. Currently commonly used one-sided welding and two-sided forming methods are as follows: figure 1 and figure 2 As shown, after the ceramic liner 4 is pasted on the back of the weld seam 205 of the first round pipe 201 and the second round pipe 202 through an adhesive tape 204, only one side of the steel structure is welded, and both si...

AI Technical Summary

Problems solved by technology

[0003] In building steel structures, steel pipes are mainly used to bear weight, not for storage or transportation of materials. Most of them have small calibers and cannot be entered by people. It is difficult for workers to enter the circle when two small-diameter circular steel pipes are welded. The ceramic liner is pasted inside the shaped steel pipe, so the conventional single-side welding and double-side forming welding construction cannot be carried out; if the ceramic liner is not pasted, but only fixed by simple physical friction, the ceramic liner will be damaged during the welding process on site. Sliding is very easy to occur, and the accuracy of the assembled interface is not easy to control, which seriously affects the welding quality of single-sided welding and double-sided forming

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