Non-destructive detection method for detecting crimping quality of tension-resistant wire clamp by utilizing ultrasonic phased array

A technology of ultrasonic phased array and strain clamp, which is applied in the analysis of solids using sound waves/ultrasonic waves/infrasonic waves, material analysis using sound waves/ultrasonic waves/infrasonic waves, and measuring devices. It can solve the problem of crimping position and crimping quality detection Difficulties and other problems, to achieve the effect of improving work efficiency, ensuring safe operation, and clear images

Active Publication Date: 2018-03-13
STATE GRID LIAONING ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention mainly aims at the problem that the crimping position and crimping quality are difficult to detect after the high-altitude on-site installation of the compression type strain clamp in the prior art, and provides a non-destructive method for detecting the crimping quality of the strain clamp by using ultrasonic phased array. The detection method, specifically, uses ultrasonic phased array deflection, focusing and imaging technology to intuitively reflect the non-destructive detection method of the crimping position and crimping quality of the compression type strain clamp

Method used

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  • Non-destructive detection method for detecting crimping quality of tension-resistant wire clamp by utilizing ultrasonic phased array
  • Non-destructive detection method for detecting crimping quality of tension-resistant wire clamp by utilizing ultrasonic phased array
  • Non-destructive detection method for detecting crimping quality of tension-resistant wire clamp by utilizing ultrasonic phased array

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Embodiment 1

[0034] The invention is a non-destructive testing method for testing the crimping quality of strain-resistant clamps by using ultrasonic phased array, and the specific implementation steps are as follows:

[0035] (1) Select a crimping plane after the crimping of the tension clamp is completed as the detection surface;

[0036] (2) Set the workpiece parameters of the tested strain clamp joint, and adjust the ultrasonic phased array instrument.

[0037] Set up the ultrasonic phased array instrument according to the size parameters of the aluminum sleeve 2, adjust and calibrate the ultrasonic phased array instrument; apply glycerin with good sound transmission performance on the detection surface, so as to maintain a good coupling contact between the probe and the workpiece, Reduce energy loss after ultrasonic waves enter the workpiece;

[0038] (3) Put the probe on the crimping plane, adopt the phased array longitudinal wave detection method, adjust the gain value and display ...

Embodiment 2

[0041] In this implementation case, the 500kV transmission line compression type strain clamp is selected for inspection and implementation, and the strain clamp model is: NY-630 / 45. The specific detection steps in this implementation case are as follows:

[0042] 1. Select one of the six crimping planes of the strain clamp as the detection surface;

[0043] 2. Measure the thickness of the aluminum casing by a thickness gauge to be 12mm;

[0044] 3. Apply glycerin with good sound transmission performance on the detection surface, so as to maintain good contact between the probe and the workpiece, and reduce the energy loss after the ultrasonic wave enters the workpiece;

[0045] 4. Set the parameters of the tension clamp joint to be tested, select the longitudinal wave detection method, and the focus depth is 12mm±0.5mm; excite 1-128 chips of the phased array probe.

[0046] 5. Adjust the sound velocity and delay of the ultrasonic phased array instrument through the test blo...

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Abstract

The invention relates to the technical field of non-destructive detection of power transmission lines, in particular to a non-destructive detection method for detecting the crimping quality of a compression type tension-resistant wire clamp by utilizing an ultrasonic phased array. The non-destructive detection method comprises the following specific implementation steps: selecting a crimping planeafter the completion of tension-resistant wire clamp crimping as a detection surface; setting workpiece parameters of a detected tension-resistant wire clamp joint and adjusting an ultrasonic phasedarray instrument; putting a probe on the crimping plane, adjusting an instrument gain value and the display scope by adopting a phased array longitudinal wave detection method, so that a fan scanningimage is clear, and an internal structure of a crimping joint is presented in the form of the image; obtaining and preserving the clear image, and analyzing and judging the crimping situations. The non-destructive detection method provided by the invention has the benefits that the online detection can be performed, and the detection quality accuracy is high, so that the working efficiency is significantly improved, and the safe operation of a power grid is guaranteed; the ultrasonic phased array can directly reflect the crimping quality of the tension-resistant wire clamp through the visual image without moving the probe, and detection results are displayed in the form of the image, so that clear and visual effects are realized; the non-destructive detection method is simple and suitablefor field application.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing of power transmission lines, in particular to a non-destructive testing method for testing the crimping quality of compressed strain clamps by using ultrasonic phased arrays. Background technique [0002] Tension clamps are mainly used for the upper corners, splices and terminal connections of overhead lines, distribution lines, substations and distribution devices of power plants. The main components of the compression type strain clamp are the aluminum sleeve and the steel anchor. In the installation of the strain clamp, the aluminum sleeve and the steel anchor play different roles. The role of the steel anchor is to connect the steel core of the steel-reinforced aluminum stranded wire, and then pass through the aluminum sleeve, and apply pressure to cause plastic deformation of the sleeve, thereby making the connection and fixing of the wire and the clamp, so that the clamp and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/06
CPCG01N29/043G01N29/0654G01N2291/023
Inventor 董伟孙明成张超群黄旭韩德斌霍彦
Owner STATE GRID LIAONING ELECTRIC POWER RES INST
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