螺旋管换热器无缆内检测系统研究  

Research on Wireless Internal Testing System for Helical Heat Exchanger Tube

作　　者：杨成浩 韩赞东[1,2] 欧正宇 董仕豪 YANG Cheng-hao;HAN Zan-dong;OU Zheng-yu;DONG Shi-hao(Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China;State Key Laboratory of Tribology,Beijing 100084,China)

机构地区：[1]清华大学机械工程系,北京100084 [2]摩擦学国家重点实验室,北京100084

出　　处：《仪表技术与传感器》2022年第9期67-71,共5页Instrument Technique and Sensor

摘　　要：针对带缆涡流检测方法在螺旋管换热器检测中易自锁而无法穿过管道的问题,设计了螺旋管换热器无缆内检测系统。可使用液体或气体驱动检测系统穿过螺旋管,检测系统穿过管道后,通过上位机读取检测系统中存储的数据。通过有限元仿真的方法,选择合适的激励频率和检测线圈参数,检测信号激励频率为100 kHz,检测线圈尺寸为宽3 mm、外径12 mm、内径8 mm。在外径19 mm、壁厚3 mm的不锈钢管道上进行了实验,实验结果表明检测系统可以检测直径为1 mm通孔缺陷和深度为2 mm外壁缺陷,通过气体驱动检测系统实现了螺旋管的检测。In order to solve the problem that it is difficult to pass through the helical heat exchanger tube by the cable eddy current testing method due to self-locking,a wireless internal testing system for helical heat exchanger tube was developed.The system was driven by liquid or gas and after passing through the tube,the data stored in the testing system was read by the host computer.The finite element simulation method was used to select the appropriate excitation frequency and testing coil parameters.The excitation frequency of the testing signal is 100 kHz and the size of the testing coil is 3 mm in width,12 mm in outer diameter and 8 mm in inner diameter.Testing experiments were carried out on stainless steel tubes with an outer diameter of 19 mm and a wall thickness of 3 mm.The experimental results indicate that the testing system can detect the through hole defect with diameter of 1 mm and the outer wall defect with depth of 2 mm.The testing of the helical tube was carried out using the testing system driven by gas.

关 键 词：无损检测 涡流检测 螺旋管 无缆内检测 有限元仿真 

分 类 号：TH878[机械工程—仪器科学与技术]