Flat Welding Flange Inner Coupling

Abstract

The invention relates to a flat-welded flange inner counterpart, which comprises a central shaft, a tightening nut, a rotating bracket, a top block, a connecting rod assembly and a supporting ring. The tightening nut is threadedly connected with the front section of the central shaft, the middle part of the rotating bracket body is opened and connected to the middle section of the central shaft by sliding through the hole, and the surface of the central shaft on both sides of the rotating bracket is provided with limiting parts for limiting the lateral movement of the rotating bracket; The connecting rod assembly is composed of two sets of connecting rod assemblies connecting a top block and the corresponding tightening nut hinged seat and rotating bracket hinged seat. When the central shaft is rotated, the distance between the tightening nut and the rotating bracket becomes shorter, so that the top block is tightly pressed against the inner wall of the pipe. The relative position between the flange and the pipe can be adjusted by rotating the cross cage, and welding can be performed after adjustment is in place. The matching device of the invention can ensure the coaxiality and the parallelism of the end faces when the flat welding flange is connected to the pipeline, improve the matching efficiency, ensure the accuracy, and have small welding deformation.

Description

technical field [0001] The invention relates to a pipeline welding installation tool, in particular, an inner counterpart for connecting a flat welding flange and a pipeline. Background technique [0002] In the prior art, when welding flat-welded flanges, the flanges and pipes are matched manually, which is slow, the accuracy is not easy to guarantee, rework occurs, the welding deformation in the welding process is not easy to control, and the difficulty of construction increases with the increase of the diameter of the flanges. Among the various matching devices at present, pipeline matching is the main one, and the internal matching device is complex in equipment and cumbersome in operation, but none of them are suitable for welding flat welding flanges and pipelines. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a flat-welded flange inner counterpart, thereby ensuring improved counterpart efficiency and wel...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, when welding the flat welding flange, the flange and the pipeline are manually matched, the speed is slow, the accuracy is not easy to guarantee, there is rework, the welding deformation in the welding process is not easy to control, and the difficulty of construction becomes larger as the diameter of the flange increases

Among the various matching devices at present, the pipe matching is the main one, and the inner matching device is complex and cumbersome to operate, but it is not suitable for welding flat welding flanges and pipes

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