锅炉膜式水冷壁漏磁检测磁化结构设计及分析  

Design and analysis of magnetization structure for leakage magnetic detection of boiler membrane waterwall

作　　者：陈涛 孙晗 杨象岳 刘延雷 金斌戈 熊伟东 CHEN Tao;SUN Han;YANG Xiangyue;LIU Yanlei;JIN Binge;XIONG Weidong(Hangzhou Special Equipment Inspection and Science Research Institute,Hangzhou 310051,China;Nanjing Boiler and Pressure Vessel Inspection Institute,Nanjing 210000,China)

机构地区：[1]杭州市特种设备检验科学研究院,杭州310051 [2]南京市锅炉压力容器检验研究院,南京210000

出　　处：《无损检测》2025年第3期1-5,共5页Nondestructive Testing

基　　金：国家市场监督管理总局科技计划项目(2022MK162)。

摘　　要：在采用漏磁检测技术对锅炉水冷壁管进行缺陷检测时,受水冷壁鳍片结构的影响,水冷壁管缺陷处的漏磁信号强度会被削弱,从而导致检测灵敏度下降。针对此问题,提出了增加磁化单元,对待检水冷壁管两侧管道同时进行磁化的改进方案,并且对该方案的可行性进行了深入研究。建立了并列三个磁化单元的有限元模型,对比分析了增加磁化单元前后水冷壁管缺陷处的漏磁信号强度,最后通过试验验证了数值计算结果的准确性和改进方案的可行性,为锅炉水冷壁管漏磁检测设备的开发和应用提供参考。When using magnetic flux leakage detection technology to detect the defect of boiler water wall tube,due to the influence of the fin structure of the water-cooled wall,the magnetic flux leakage signal strength at the defect location of the water-cooled wall tube will be weakened,leading to a decrease in detection sensitivity.In response to the above issues,the author of this article proposed an improved scheme of adding a magnetization unit to simultaneously magnetize the pipes on both sides of the water-cooled wall pipe to be inspected.Furthermore,the author conducted in-depth research on the feasibility of this scheme.A finite element model of the magnetization structure of the boiler water-cooled wall tube containing three magnetization units was established.The magnetic leakage signal strength at the defects of the water-cooled wall tube before and after adding magnetization units was compared and analyzed.Finally,the accuracy of the numerical calculation results and the feasibility of the improvement plan were verified through experiments.The research content of this article could provide reference for the development and application of magnetic leakage detection equipment for boiler water-cooled wall tubes.

关 键 词：锅炉 膜式水冷壁 漏磁检测 磁化结构 有限元分析 

分 类 号：TH49[机械工程—机械制造及自动化] TG115.28[金属学及工艺—物理冶金]