Butt welding centering and positioning method of pipeline group

Abstract

The invention discloses a centering and locating method for welding a pipeline assembly. The method includes the first step of carrying out rough centering on pipelines through adjustment of a hydraulic pulling and rolling device, the second step of fixing a meter frame on the outer circumference of a rotated pipeline, adjusting a digital display dial meter measurement rod to be vertically downward and enabling any point to be an initial measurement position point, wherein the any point refers to the point that a measurement head makes contact with a fixed pipeline; the third step of carrying out zero setting on the digital display dial meter, utilizing the hydraulic pulling and rolling device to enable the rotated pipeline to slowly rotate 360 degrees clockwise around the axis where the circle center of the rotated pipeline is located, and recording two maximum variable values read on the digital display dial meter, the fourth step of calculating the adjustment distance of the rotated pipeline in the Z direction and the adjustment distance of the rotated pipeline in the X direction, and the fifth step of adjusting the distance of the rotated pipeline in the vertical direction and the distance of the rotated pipeline in the horizontal direction according to the adjustment distance of the rotated pipeline in the Z direction and the adjustment distance of the rotated pipeline in the X direction. The centering and locating method for welding the pipeline assembly is visual and clear and high in centering accuracy.

Description

technical field [0001] The invention relates to a centering and positioning method, in particular to a pipeline group butt welding centering and positioning method. Background technique [0002] As a clean energy, natural gas gradually replaces the traditional artificial gas. It has high calorific value, low cost, and less pollution. It has been widely used in recent years. Pipeline is an important tool for transporting natural gas, and pipeline welding assembly is an important link in pipeline installation. The welding quality of pipeline is directly related to the safe operation of natural gas pipeline. During butt welding of pipeline groups, adjusting the horizontal and vertical radial gaps between the two groups of pipelines to ensure coaxiality is an important prerequisite for pipeline welding. [0003] At present, hydraulic or pneumatic counterparts are often used to ensure the coaxiality in the welding construction of the pipeline group. The counterpart equipment is ...

AI Technical Summary

Problems solved by technology

[0003] At present, hydraulic or pneumatic counterparts are often used to ensure the coaxiality in the welding construction of the pipeline group. The counterpart equipment is expensive and the construction is more complicated. It requires professional technicians to operate, which brings inconvenience to the welding construction of the pipeline group.

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