高压电器2024，Vol.60Issue(4)：165-172,8.DOI:10.13296/j.1001-1609.hva.2024.04.020
基于临界折射纵波法的盆式绝缘子法兰螺栓松动检测
Detection on Looseness of Flange Bolt of Insulating Spacer Based on Critical Refraction Longitudinal Wave Method
摘要
Abstract
Insulating spacer is the key insulation element of GIS.It is fastened and connected with the flanges of the gas compartment on both sides by bolts.The bolts,in case of loose,will lead to uneven stress distribution of insulat-ing spacer,thus affecting both safety and stability of the insulating spacer.In this paper,a method for detecting the bolt looseness of insulating spacer flanges based on ultrasonic critically refracted longitudinal waves(LCR)is proposed.The looseness of bolts is reflected in accordance with the acoustic time difference of LCR wave propagation on the sur-face of the insulating spacer flanges.The results show that,in case of looseness of the adjacent bolts,the LCR wave has the largest change in the flange surface acoustic time difference between the loose bolts,and the magnitude of variation is greater than 24 ns;While,when the non-adjacent bolts are loose,the acoustic time difference on the surface of flange of LCR on the opposite side of the loose bolt is maximum and the acoustic time difference is greater than 10 ns,and the greater the bolt looseness,the greater the ultrasonic propagation acoustic time difference.The de-tection method can achieve the detection of the looseness of the flange bolts of the insulating spacer,judge the num-ber and position of the loosening of the bolts and has certain engineering practical value.关键词
盆式绝缘子/临界折射纵波/斯涅尔定律/法兰螺栓/松动检测Key words
insulating spacer/critically refracted longitudinal wave/Snell's law/flange bolt/looseness detection引用本文复制引用
葛健,王伟,宋建成,焦国勋,李鹏江,高晋武,任鸿秋..基于临界折射纵波法的盆式绝缘子法兰螺栓松动检测[J].高压电器,2024,60(4):165-172,8.基金项目
国网山西省电力公司科技项目(基于超声波的GIS盆式绝缘子应力检测关键技术研究及应用). Project Supported by State Grid Shanxi Electric Power Company Science and Technology Project(GIS Basin Insulator Stress Detection Based on Ultrasonic Key Technology Research and Application). （基于超声波的GIS盆式绝缘子应力检测关键技术研究及应用）
