An on-site detection method of pressure welding positioning defects for a strain clamp

A tension clamp, on-site detection technology, used in measuring devices, using sonic/ultrasonic/infrasonic waves to analyze solids, instruments, etc. Ensure the quality of crimping construction, light and durable equipment, simple and efficient detection

Active Publication Date: 2014-11-26
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the crimping of the strain clamp is a concealed project of the infrastructure construction of the transmission line, the internal defects of the aluminum sleeve 2 of the strain clamp, especially the crimping positioning d

Method used

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  • An on-site detection method of pressure welding positioning defects for a strain clamp
  • An on-site detection method of pressure welding positioning defects for a strain clamp
  • An on-site detection method of pressure welding positioning defects for a strain clamp

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Experimental program
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Embodiment Construction

[0022] In this embodiment, a 110kV line in Hunan Power Grid is selected for inspection and implementation at the maintenance site of the tension section. There are six crimp planes.

[0023] Such as image 3 As shown, the implementation steps of the on-site detection method for crimping positioning defects of tension clamps in this embodiment are as follows:

[0024] 1) Calibrate the ultrasonic thickness measurement device;

[0025] 2) Align the tension clamp to be detected for detection, select a crimping plane of the tension clamp to be detected as the current detection surface, and use the ultrasonic thickness measurement device to detect the thickness data of the current detection surface in the direction of the vertical axis Whether there are two changes equal to the depth of the groove on the steel anchor in the tension clamp, if so, it is determined that the crimping positioning of the tension clamp is accurate, otherwise it is determined that there is a crimping posi...

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Abstract

An on-site detection method of pressure welding positioning defects for a strain clamp is disclosed. The method includes: 1) a step of calibrating an ultrasonic thickness measurement device; and 2) a step of selecting one pressure welding plane of the strain clamp to be detected as a present detection surface, and detecting whether the thickness data of the present detection surface has two times of change equal to the grove depth on a steel anchor in the strain clamp at the longitudinal axis direction by utilization of the ultrasonic thickness measurement device, wherein if yes, the pressure welding positioning of the strain clamp is accurate, and if not, the strain clamp has pressure welding positioning defects. The method has advantages of no need of destroying clamp inner structures, simple, convenient and efficient detection, and suitability for outdoor construction on-site detection of electric transmission lines.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing of power transmission lines, in particular to an on-site testing method for crimping and positioning defects of tension clamps. Background technique [0002] Such as figure 1 and figure 2 As shown, the strain clamp is an important connecting fitting for the transmission line. It is composed of a steel anchor 1 and an aluminum sleeve 2. The steel anchor 1 is used to connect and anchor the steel core of the transmission wire and bear the stress of the steel core of the wire. The steel anchor The front end of 1 is designed with two grooves 11 with a depth of 1 mm and a width of 7 to 10 mm; the aluminum sleeve 2 is outside the steel anchor 1 and the aluminum strand of the wire, and is used to make the aluminum sleeve 2 plastically deform and connect with the steel through crimping. The surface of the anchor 1 is closely combined to form a friction force to bear the stress of the alu...

Claims

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Application Information

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IPC IPC(8): G01N29/04G01B17/02
Inventor 谢亿欧阳克俭胡加瑞刘纯王军龙毅
Owner STATE GRID CORP OF CHINA
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