Accurate assembly method for oblique cutting connection pipes on large-diameter metal cylinder

Abstract

Disclosed is an accurate assembly method for oblique cutting connection pipes on a large-diameter metal cylinder. A lower laser alignment hole seat, a positioning adjustment seat, a supporting pipe, a target plate seat, a target plate and an upper laser alignment hole seat are arranged by taking the bottom of a lower flange of a container as a datum, and laser beams are emitted from the lower laser alignment hole seat and penetrate a target hole and an upper laser alignment hole to determine the longitudinal axis of the cylinder. A scribing rod is mounted on the target plate seat, the included angle between the upper surface of the scribing rod and the upper surface of the target plate is adjusted into an angle stipulated by a design drawing, the centers of oblique cutting connection pipe holes are marked on the cylinder, and the oblique cutting connection pipe holes are formed. Connection pipe laser alignment hole seats are mounted on connection pipe flanges and inserted into the oblique cutting connection pipe holes of the cylinder, the laser beams are emitted by a laser collimator, penetrates hole in a top plate and a bottom plate of the hole seat and are intersected at the target hole in the target plate to perform welding, and the oblique cutting connection pipes on the large-diameter metal cylinder of pressure containers, metal pipelines and the like in petrochemical industry can be accurately assembled.

Description

Technical field [0001] The invention relates to an accurate assembly method of oblique plug-in pipes on a large-diameter metal cylinder, which is used for accurate assembly of oblique plug-in pipes on a large-diameter metal cylinder. A pair where the axis of the oblique plug pipe intersects the longitudinal axis of the cylinder at one point. It can be widely used in the manufacture of large pressure vessels and metal pipelines in the petroleum and chemical industries. Background technique [0002] Due to the requirements of the production process, there will be many oblique plug-in pipes on the cylinder body of the pressure vessel and the pressure pipeline. These oblique plug-in pipes are welded to the cylinder body through the oblique plug-in pipe hole opened on the cylinder body. The angle between the axis of the pipe and the plane perpendicular to the longitudinal axis of the cylinder requires precision. For some pressure vessels, due to the requirements of the production pr...

AI Technical Summary

Problems solved by technology

For the assembly of cylinders and obliquely inserted pipes that require high assembly accuracy, even if precision CNC machine tools are used to mechanically open holes and process welding grooves on the cylinders, due to the existence of reserved gaps, the traditional wire drawing method cannot meet the requirements. Accurate combination of obliquely inserted connecting pipe and cylinder on diameter metal cylinder

[0007] Therefore, the traditional methods of mechanically cutting holes and using wire drawing methods to control the pairing accuracy of obliquely inserted pipes and cylinders are generally only suitable for the assembly and welding of obliquely inserted pipes on small-diameter metal cylinders, or for Assembling and welding of obliquely inserted pipes on cylinders that do not require high assembly accuracy, but it is difficult to meet the precise assembly and welding of obliquely inserted pipes on large-diameter metal cylinders

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