管道阀门腐蚀缺陷的热成像检测研究  

Thermal image detection for corrosion defects of pipeline valves

作　　者：丁继超 何立东 张力豪 DING Ji-chao;HE Li-dong;ZHANG Li-hao(Beijing Key Laboratory of Health Monitoring and Self-Recovery for High end Mechanical Equipment,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学高端机械装备健康监控与自愈化北京市重点实验室

出　　处：《机电工程》2019年第6期608-612,共5页Journal of Mechanical & Electrical Engineering

基　　金：国家重点基础研究发展计划资助项目(2012CB026000)

摘　　要：为了在线检测煤化工阀门内壁冲刷腐蚀现象,采用流场分析软件对水煤浆球阀进行了流固耦合流场模拟计算,并对阀门流场特点进行了分析。利用电磁线圈激励红外热成像法,搭建了在线检测实验台,对缺陷钢板进行了热成像原理分析;预制了阀门和管道缺陷,并对其进行了热成像实验研究。研究结果表明:阀门的冲刷腐蚀最容易出现在进出口的金属密封环部位及其附近区域的阀体内表面,可通过红外成像无损检测法检测阀门及管道冲刷腐蚀缺陷;线圈激励时间越长,激励电流越大,越容易检测出缺陷;U型缺陷比V型缺陷更容易被检测到。In order to detect the corrosion phenomenon of the inner wall of coal chemical valve on-line, the flow field analysis software was used to simulate the fluid-solid coupling flow field of the coal-water slurry ball valve, and the characteristics of the valve flow field were analyzed, and then the infrared thermal imaging method was excited by the electromagnetic coil. An on-line test bench was constructed. The thermal imaging principle of the defective steel plate was analyzed, and the valve and pipe defects were prefabricated and carried out. The results show that the erosion of the valve is most likely to occur in the inner surface, as the metal seal ring of the inlet and outlet and the valve body surface in the vicinity, and the corrosion defects of the valve and the pipeline can be detected by infrared imaging non-destructive testing. The coil excitation time is longer, the excitation current is larger, and the defects is easier to be detected. The U-type defects are easier to be detected than the V-type defects.

关 键 词：管道阀门 冲刷腐蚀 流场分析 电磁激励 红外热成像检测 

分 类 号：TH878[机械工程—仪器科学与技术] TG115.28[机械工程—精密仪器及机械]