A method for detecting the pressing condition of tension clamps in high-voltage power grid

Abstract

The invention discloses a method for detecting a high-voltage grid strain clamp press fit situation. The method comprises the steps: 1) preparing strain clamps of corresponding specifications, using cylinders of the strain clamps of the corresponding specifications as reference blocks and manufacturing an aluminum wire clamp including three situations of empty press, compaction and poor press fit according to a clamping technology on a high-voltage grid; 2) choosing a detecting instrument and a probe; 3) choosing a coupling agent; 4) choosing flexibility; 5) detecting flexibility adjustment; 6) evaluating defects: choosing three detection faces, separating the detection face from the detection face with one face, judging that the positions of the strain clamps are tightly clamped if primary reflection wave amplitudes of the three detection faces are all lower than 80% and judging that the positions of the strain clamps are not tightly clamped if a primary reflection wave amplitude of one face is higher than 80%. The method avoids consuming a lot of labor, materials and time, has more accurate and quicker judgment on detection results, is free of irradiation and more environment-friendly and is simpler and more convenient to operate.

Description

Technical field [0001] The invention relates to the technical field of non-destructive testing, and in particular to a method for detecting the compression of a tension clamp of a high-voltage power grid. Background technique [0002] The tension clamp is used to fix the wire to the non-linear pole tower tension insulator string, which acts as an anchor and is also used to fix the cable of the cable pole. In order to ensure that the strain clamp can withstand the full tension of the wire, the compression of the strain clamp is particularly important. Under normal crimping conditions, the steel anchor cam and aluminum pipe in the tension clamp area should have obvious occlusal marks, and the joint should be tight and no gap. [0003] At this stage, it is the only theoretically feasible method to use radiographic technology to detect the compression of the high-voltage power grid's strain wire clamp. The strain clamps of high-voltage power grids in service are generally on the 50m ...

AI Technical Summary

Problems solved by technology

But on the one hand, the ray has radiation, which is very harmful to the environment and human body; The influence of the ray will make the focus of the rays shift, resulting in unclear images

Furthermore, personnel need to leave a certain distance from the ray machine during operation, which requires personnel to climb up and down continuously, which consumes a lot of manpower and material resources.

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