热力管道缺陷弱磁检测技术仿真与试验验证  

Simulation and Experimental Verification of Weak Magnetic Detection Technology for Heating Pipeline Defects

作　　者：孙继伟 胡博[2] 裴连军 李峻嵩 付金栋 朱咏梅 范彦钊[1] 王永 SUN Jiwei;HU Bo;PEI Lianjun;LI Junsong;FU Jindong;ZHU Yongmei;FAN Yanzhao;WANG Yong

机构地区：[1]天津市津安热电有限公司,天津300204 [2]南昌航空大学,江西南昌330034 [3]天津津能股份有限公司,天津300050 [4]天津恒泰感知精测科技有限公司,天津300221 [5]天津市热电有限公司,天津300161

出　　处：《煤气与热力》2022年第2期9-12,共4页Gas & Heat

摘　　要：针对热力管道缺陷,提出基于磁场梯度的非开挖弱磁检测技术。介绍基于磁梯度法的弱磁检测原理。建立管道三维模型,对管道环形凹槽缺陷、穿孔缺陷的磁感应强度变化进行仿真模拟,试验验证弱磁检测技术的可行性。由仿真结果可知:对于环形凹槽缺陷,磁感应强度在环形凹槽缺陷处明显异常,环形凹槽深度越大,变化越小。对于穿孔缺陷,磁感应强度在穿孔缺陷处明显异常;孔径在40 mm以下时,变化比较剧烈;孔径大于等于40 mm时,变化比较缓和。由试验验证结果可知:试验结果与仿真结果基本一致。基于磁场梯度的弱磁检测技术对小缺陷敏感,可用于热力管道的非开挖检测。Aiming at the defects of heating pipeline,a trenchless weak magnetic detection technology based on magnetic field gradient is proposed.The principle of weak magnetic detection based on the magnetic gradient method is introduced.A three-dimensional model of the pipe is established to simulate the change of magnetic induction intensity of the annular groove defect and perforation defect of the pipe,and the feasibility of weak magnetic detection technology is verified by experiments.The simulation results show that for the annular groove defects,the magnetic induction intensity is obviously abnormal at the annular groove defect.The greater the depth of the annular groove,the smaller the change.For perforation defects,the magnetic induction intensity is obviously abnormal at the perforation defect.When the aperture is below 40 mm,the change is quite dramatic.When the aperture is greater than or equal to 40 mm,the change is relatively mild.It can be seen from the experimental verification results:the experimental results are basically consistent with the simulation results.The weak magnetic detection technology based on magnetic field gradient is sensitive to small defects and can be used for trenchless detection of heating pipelines.

关 键 词：热力管道缺陷 非开挖检测 磁梯度法 弱磁检测 仿真模拟 

分 类 号：TU995.3[建筑科学—供热、供燃气、通风及空调工程]