Rapid evaluation tool and rapid evaluation method for weld quality of butt-fusion welding

Abstract

The invention relates to a rapid evaluation tool and a rapid evaluation method for weld quality of butt-fusion welding. The rapid evaluation tool is characterized by comprising rubber handles, arms of force, test strip-fixing pins, and test strip treatment modules, the two sets of test strip treatment modules are symmetrically arranged on the left and the right, and are movably connected through a connecting roller at the joint, test strips to be tested are fixed by the test strip-fixing pins on the tops of the test strip treatment modules, the outsides of the left test strip treatment module and the right test strip treatment module are respectively connected to an arm of force, the rubber handles are arranged on the hand-held parts of the arms of force, and thereby a lever structure with the roller as a fixed point is formed. The rapid evaluation tool is easy to operate, and operation can be carried out by only two persons when a weld tensile failure test is performed; when being carried out, the weld tensile failure test is quick and direct, and the whole process can be completed in only a few of minutes; the application range is wide, and the tool can be applied to the inspection of butt-fusion welds of most calibers of common polyethylene pipes, and is not limited by external diameters and wall thicknesses of pipes.

Description

[technical field] [0001] The invention relates to the technical field of butt welding, in particular to a rapid evaluation tool and a rapid evaluation method for the quality of hot-melt butt welding joints. [Background technique] [0002] Polyethylene pipe is currently the main type of pipe used in urban gas transmission pipes and water supply and drainage pipes in the municipal industry. It occupies more than 90% of the European gas industry market, and has also achieved substantial growth in my country in recent years. However, there is still no effective means of on-site inspection for polyethylene pipe welding, and only rely on appearance inspection and laboratory inspection for quality screening, especially when welding materials, equipment, processes, and personnel are changed, and process evaluation is required. The laboratory test is slow and cumbersome, which has a great impact on the construction progress of the project. This tool can be used to quickly detect wel...

AI Technical Summary

Problems solved by technology

The destructive test of polyethylene pipes is carried out in accordance with the provisions of GB 19810, which requires large-scale special tensile test equipment and corresponding qualified inspection personnel and laboratories. The test cannot be carried out on site, and the process is complicated and the cycle is long

It is impossible to try out the situation that requires fast pre-construction welding process evaluation, resulting in time and economic waste, and causing inconvenience for rapid construction.

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