超声导波技术在GIS穿墙套管腐蚀检测中的可行性研究
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摘要
GIS穿墙套管与墙体接触部位的局部表面易发生点状、孔状腐蚀,在不破拆墙体的情况下,采用常规方法无法准确检测该部位腐蚀情况。超声导波检测是国际上新兴的一种快速评估管道缺陷的无损检测技术,通过搭建一套基于磁致伸缩原理的自激自收扭转导波检测系统,验证该技术在GIS穿墙套管腐蚀检测中的可行性。试验结果表明,超声导波在通过墙体后能量衰减较小,不存在信号的模态转换,对检测结果的准确性影响较小。超声导波技术可以应用于GIS穿墙套管腐蚀检测工作。
Pitting corrosion which is prone to happen on the local surface of contact area between GIS wall bushing and wall cannot be detected accurately by routine method without breaking the wall. Ultrasonic guided wave detection is an emerging nondestructive detection technology for rapid assessment of pipeline defects in the world. The feasibility of the technology in the corrosion detection of GIS wall bushing is testified by building a set of torsional guided wave detection system with self-excitation and selfreception based on magnetostriction principle. Test results show that the ultrasonic guided wave has lower energy attenuation after passing through the wall and has no signal mode conversion which has little effect on the accuracy of the detection results. The ultrasonic guided wave technology can be applied in the corrosion detection of GIS wall bushing.
Pitting corrosion which is prone to happen on the local surface of contact area between GIS wall bushing and wall cannot be detected accurately by routine method without breaking the wall. Ultrasonic guided wave detection is an emerging nondestructive detection technology for rapid assessment of pipeline defects in the world. The feasibility of the technology in the corrosion detection of GIS wall bushing is testified by building a set of torsional guided wave detection system with self-excitation and selfreception based on magnetostriction principle. Test results show that the ultrasonic guided wave has lower energy attenuation after passing through the wall and has no signal mode conversion which has little effect on the accuracy of the detection results. The ultrasonic guided wave technology can be applied in the corrosion detection of GIS wall bushing.
引文
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[9]邢耀淇,高佳楠,陈以方.超声近场导波在薄壁管检测中的应用[J].无损检测,2016,38(2):5-8.
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[2]毛学飞.变电站GIS穿墙套管腐蚀漏气现象分析[J].广西电业,2013,18(5):114-115.
[3]张猛,吴雪峰,王建西.GIS铝合金材质壳体交流感应电化学腐蚀现象研究[J].高压电器,2014,50(9):1-5.
[4]罗斯J L著.固体中的超声波[M].何存富,吴斌,王秀彦译.北京:科学出版社,2004.
[5]马宏伟,张喆斯,宋振华.大直径管道磁致伸缩纵向导波传感器偏置磁场的优化设计[J].无损检测,2013,35(9):10-15.
[6]阿肯巴赫著.弹性固体中波的传播[M].徐植信,洪锦如译.上海:同济大学出版社,1992.
[7] Rose J L.A baseline and vision of ultrasonic guided wave inspection potential[J].A S M E J,P ressure Vessel Technol,2002,124(3):273-282.
[8]高博.基于新型磁致伸缩传感器的管道缺陷和液体粘滞系数检测研究[D].北京:北京工业大学,2014.
[9]邢耀淇,高佳楠,陈以方.超声近场导波在薄壁管检测中的应用[J].无损检测,2016,38(2):5-8.
[10]汤欢.管道缺陷接触式磁致伸缩扭转导波检测方法[D].武汉:华中科技大学,2011.
[11]王悦民,朱龙翔,李城华.磁致伸缩导波模式控制传感器技术[J].无损检测,2010,32(9):722-724.