压接管内部进水超声检测技术  

Ultrasonic detection technique of the crimp tube water ingress defect

作　　者：饶迪 方春华[1] 游海鑫 钮非凡 周固 普子恒[1] 江进波 董晓虎 RAO Di;FANG Chunhua;YOU Haixin;NIU Feifan;ZHOU Gu;PU Ziheng;JIANG Jinbo;DONG Xiaohu(College of Electrical and New Energy,Three Gorges University,Yichang 443002,Hubei,China;State Grid Hubei Province Ultra-high Voltage Company,Wuhan 430050,Hubei,China)

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002 [2]国网湖北省超高压公司,湖北武汉430050

出　　处：《声学技术》2025年第2期203-209,共7页Technical Acoustics

基　　金：国家自然科学基金项目(51807110);2022年度电网环境保护国家重点实验室开放基金项目(GYW51202201415)。

摘　　要：耐张线夹在长期运行中,内部的密封材料容易失效,导致未压区存在积水,容易发生未压区鼓包、锈蚀、钢芯和铝管断裂等缺陷,并引发严重的电力事故。文章提出基于超声脉冲反射法检测压接管内部进水的方法,研究超声检测压接管内部进水的最佳检测频率、最佳检测位置以及不同进水深度时的回波特征。结果表明,对于铝管内壁一次回波:进水情况下的回波峰值小于空气情况下的回波峰值,随着进水深度的改变,进水情况下的回波峰值保持不变;观察水-空气界面一次回波的接收时间可以判断压接管内部的进水深度。该方法为检测压接管内部进水提供了一种新的思路。Due to long-term operation of tension clamp,the internal sealing material is prone to failure,which results in water accumulation,bulge and corrosion in the unpressed zone,steel core and aluminum tube breakage,and finally to cause serious power accidents.A method to detect water ingress into the crimp tube based on ultrasonic pulse reflection is proposed.The optimal detection frequency,the best detection position and the echo characteristics of water ingress are studied.The results show that for the primary echo at the inner surface of the aluminum tube:the echo peak in the case of water ingress is less than that in the case of air;and the echo amplitude remains unchanged while the water accumulation depth changing.By observing the arriving time of the primary echo at the water-air interface,the water depth inside the crimp tube can be evaluated.This method provides a new idea for detecting the water ingress into crimp tube.

关 键 词：输电线路 耐张线夹 超声波检测 进水 

分 类 号：TM75[电气工程—电力系统及自动化]