Corrugated flange structure for circumferential connection of corrugated steel pipes and manufacturing method of corrugated flange structure

Abstract

The invention discloses a corrugated flange structure for circumferential connection of corrugated steel pipes and a manufacturing method of the corrugated flange structure. The method comprises the following steps that (1), a reserved section of a corrugated steel plate is obliquely cut from a wave crest to the tail end of a wave waist, but not cut off, so that a wave trough of the corrugated steel plate is continuous; (2), the reserved section of the corrugated steel plate is bent along the continuous part of the wave trough until the wave crest and the wave waist of the reserved section of the corrugated steel plate are attached to a wave crest and a wave waist of a main section at a certain angle, and at the moment, the reserved section serves as a circumferential connecting flange; and (3), attached joints are welded. According to the corrugated flange structure for the circumferential connection of the corrugated steel pipes and the manufacturing method of the corrugated flange structure, a corrugated flange is made of the corrugated steel plate, the corrugated flange is consistent in shape, the situation that extra corrugated flange is not matched due to manufacturing errors of the corrugated steel plate is avoided, splicing seams are tight, and the sealing performance of a spliced channel is extremely good; the welding quality and the welding efficiency can be improved, and welding deformation caused in the welding process is reduced; and the corrugated flange and the corrugated steel plate main section are the same corrugated steel plate, so that the procedure and the cost for independently manufacturing the corrugated flange are reduced.

Description

technical field [0001] The invention relates to a flange structure and a manufacturing method thereof, in particular to a corrugated flange structure in the circumferential direction of a corrugated steel pipe and a manufacturing method thereof. Background technique [0002] There are two types of flange connections for box-type and square-arch-type corrugated steel channels in the circumferential direction, one is a flat flange, and the other is a corrugated flange, such as Figure 1~4 shown. [0003] If the circumferentially connected pipes are connected by flat flanges, the box-shaped pipes must have 8 flat flanges in the circumferential direction, that is, one corresponding to the corner of each plate, and one for each adjacent plate. This connection method has the following defects: a large amount of material is used; and the welding cost is high, especially the welding process of the corrugated weld seam between the corrugated steel plate and the flat plate is complica...

AI Technical Summary

Problems solved by technology

This connection method has the following defects: a large amount of material is used; the welding cost is high, especially the welding process of the corrugated weld between the corrugated steel plate and the flat plate is complicated and the cost is high

However, before the corrugated flange on the side plate is welded to the corrugated steel plate on the side plate, the end of the corrugated steel plate on the side plate must be cut out of the curved end face, and then welded after being vertically connected to the “T” shape of the corrugated flange. The workload is heavy, and the gap between the butt joints is uneven

The reasons for the above defects are: there is a certain error in the forming of each plate, and the error is inconsistent, there will be errors in wave height and wave distance; the end of the corrugated steel plate is thermally cut, which will deform the end, and the amount of deformation is difficult to control

In addition, the corrugated flange also has the following defects: the corrugated flange and the corrugated steel plate are all welded structures, and if the weld is under perennial dynamic load, it is easy to fatigue and crack; cutting the end of the corrugated steel plate will cause material waste

However, this method is only applicable to the case where the wave height of corrugated steel plate is low, and the applicant's subsequent repeated tests have proved that when the wave height is greater than 50mm, irregular buckling and cracking will occur at the bend, and it cannot be used as a corrugated flange. continue to use

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