基于集磁环的阴极保护电流测量装置设计  

Design on Cathodic Protection Current Measurement Device Based on Magnetic Collecting Ring

作　　者：侯岩光 赵弘[1] 香朝元 Hou Yanguang;Zhao Hong;Xiang Zhaoyuan(China University of Petroleum(Beijing),Institute of Mechanical and Transportation Engineering,Beijing,102249,China)

机构地区：[1]中国石油大学(北京)机械与储运工程学院,北京102249

出　　处：《石油化工自动化》2021年第5期58-62,共5页Automation in Petro-chemical Industry

基　　金：国家自然科学基金项目“海底油气管道封堵致振机理及气动减振控制方法研究”(51575528);中国石油大学(北京)科学基金(2462020XKJS01)。

摘　　要：阴极保护电流密度既是衡量埋地长输管道防腐涂层绝缘性能的重要指标,又是表征管道真实阴极保护状态的重要参数。设计了基于集磁环的阴极保护电流测量装置,集磁环材料选取硅钢,探究不同开口形状的集磁环对开口处磁场的影响。通过Maxwell软件建模分析发现硅钢集磁效果十分显著,集磁环的磁感应强度值放大了约2000倍;不同开口形状的集磁环开口处磁感应强度最强处分布不同,矩形开口具有最好的集磁效果,开口处的磁感应强度值放大了约750倍。实验研究表明:设计的基于集磁环的阴极保护电流测量装置灵敏度为0.186 mT/A,线性度为3.24%,基本满足测量要求。The current density of cathodic protection is not only an important index to measure the insulation performance of anti-corrosion coating of the buried long-distance pipeline,but also an important parameter to characterize the true cathodic protection state of the pipeline.A cathodic protection current measurement device based on the magnetic collecting ring is designed,the material of the magnetic collecting ring is silicon steel,and the influence of different opening shapes of the magnetic collecting ring on the magnetic field at the opening is explored.Through Maxwell software modeling and analysis,it is found that silicon steel has a significant magnetic collecting effect,and the magnetic induction intensity of the magnetic collecting ring is amplified by about 2000 times;the magnetic induction intensity at the opening of the magnetic collecting ring with different opening shapes is not the same,the rectangular opening has the best magnetic collecting effect,and the magnetic induction intensity at the opening is amplified by about 750 times.The experimental results show that the sensitivity and linearity of the designed cathodic protection current measuring device based on magnetic collecting ring are 0.186 mT/A and 3.24%respectively,which basically meet the measurement requirements.

关 键 词：管道 阴极保护 集磁环 Maxwell软件 测量 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]