A precision welding device for pipe flanges

Abstract

The invention discloses a pipeline flange precision welding device. The pipeline flange precision welding device achieves that flange threaded holes of two flange plates welded to one pipeline are automatically aligned in a one-to-one manner, which cannot be achieved in an existing pipeline flange welding technology, and calibration and alignment must be manually conducted inch by inch in the prior art. The flange threaded hole alignment solution provides convenience for follow-up rapid accurate pipeline connection; the pipeline flange precision welding device can be used for welding multipletypes of pipelines and flange plates, it is just need to correspondingly replace matching pipeline centering abutting blocks and matching flange threaded hole calibration conical bosses; the pipelineflange precision welding device can guarantee precision welding of the pipeline flanges and suitable for the nuclear power industry, the chemical industry, the building industry and the industry having high pipeline connection and seal intensity requirements.

Description

technical field [0001] The invention relates to the technical field of processing and installation equipment for chemical industry, construction and petroleum pipelines, in particular to a precision welding device for pipeline flanges. Background technique [0002] Common transportation pipelines are usually spliced ​​by a large number of pipes. Flanges are welded at both ends of each pipe, and the pipes are connected by flanges. The flange connection is convenient, firm and tight, so it is called Widely used in the connection of pipelines. [0003] In the prior art, there are many equipment and technologies for welding flanges on pipelines, and the degree of automation is quite high. For example, the technical solution with patent No. 201410267726.1 can realize automatic installation and automatic welding. [0004] But above-mentioned similar equipment also has a lot of technical problems that are difficult to solve; [0005] 1. According to the industry standard, in gene...

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a precision welding device for pipe flanges, which solves the problem of directly passing the top pressure at both ends to make the flange surface and the end surface of the pipe flush. This welding structure is prone to poor welding. Lead to leakage of the pipeline in the later stage; because the flange is sleeved on the pipeline, there must be a gap between the inner hole of the flange and the outer wall of the pipeline. If the single deposit passes through the top pressure, it is impossible to keep the flange and the pipeline concentric during welding shaft, and it is also difficult to ensure that the side of the flange is perpendicular to the axis of the pipe. If the flange is inclined, there will inevitably be a gap when the pipes at both ends are docked, leaving a safety hazard; and between the pipes They are connected by flanges, and the two flanges are then connected by bolts. In standardized products, if the screw holes of the two flanges on each pipe are not aligned one by one, then when two pipes are connected, there must be two pieces. The screw holes on the connecting flange do not correspond, and the bolts cannot be inserted

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