基于磁记忆的耐张线夹钢芯断裂检测技术  

Magnetic memory based fracture detection technology forsteel core of tension clamps

作　　者：滕玉林 吕岩婷 李军 谢金鹏 TENG Yulin;LÜYanting;LI Jun;XIE Jinpeng(Gansu Electric Power Research Institute Technology Center Co.,Ltd,Lanzhou 730070;State Grid Gansu Electric Power Company Electric Power Science Research Institute,Lanzhou 730070)

机构地区：[1]甘肃电力科学研究院技术中心有限公司,兰州730070 [2]国网甘肃省电力公司电力科学研究院,兰州730070

出　　处：《电气技术》2024年第9期51-55,64,共6页Electrical Engineering

基　　金：国网甘肃省电力公司科技项目(522722230007)。

摘　　要：针对架空输电线路压接型耐张线夹在压接施工中存在应力集中导致内部钢芯发生断裂的问题,本文介绍一种基于磁记忆的耐张线夹内部钢芯应力及断裂缺陷检测方法。通过对耐张线夹内部钢芯未断裂、部分断裂、完全断裂3种情况进行金属磁记忆检测实验,研究磁记忆信号曲线与耐张线夹内部钢芯损伤的关系,并结合X射线检测方法对磁记忆检测结果进行对比分析。结果显示,磁记忆检测技术可有效检测耐张线夹压接区域内部钢芯受损情况及存在的缺陷。耐张线夹漏磁场强度大小与内部钢芯损伤程度有关,钢芯损伤越严重,磁记忆检测到的漏磁场信号数值越大。This article introduces a magnetic memory based detection method for the internal steel core stress and fracture defects of compression type tension clamps for overhead transmission lines,which are prone to stress concentration and internal steel core fracture during compression construction.By conducting metal magnetic memory testing experiments on three situations:non fracture,partial fracture,and complete fracture of the internal steel core of the tension clamp,the relationship between the magnetic memory signal curve and the damage to the internal steel core of the tension clamp is studied,and the magnetic memory testing results are compared and analyzed using X-ray testing methods.The results show that magnetic memory detection technology can effectively detect the damage and defects of the steel core inside the compression area of the tension clamp.The magnitude of the magnetic leakage field in the tension clamp is related to the degree of internal steel core damage.The more severe the steel core damage,the greater the value of the magnetic leakage field signal detected by magnetic memory based detection method.

关 键 词：输电线路 磁记忆检测 漏磁场 线夹压接 钢芯损伤 

分 类 号：TM75[电气工程—电力系统及自动化]