摘要
对于工业架空管道检测,若采用目前广泛应用的轴向磁化漏磁检测方法,管道规格繁多造成探头规格多样,不利于现场操作。为解决这一问题,本文提出将周向磁化漏磁检测应用于工业管道检测,周向磁化漏磁检测的核心是磁化器设计。为优化便携式周向磁化漏磁检测磁化器设计,采用三维有限元方法,仿真研究周向磁化下管道磁化场分布特征,分析磁铁厚度与宽度、衔铁厚度、磁极间距、磁铁提离等参数对管道磁化场分布影响,得到探头下方管道磁感应强度大小及磁化均匀区域大小随磁化器几何尺寸和磁铁提离的变化规律,并通过实验对设计的磁化器进行验证,结果表明通过有限元仿真得到的磁化器满足检测要求。
The axial magnetization is the main magnetization method nowadays, which means that the probe specification is changed with the change of the industry pipeline specification. It is inconvenient in the field. To solve the problem, the magnetic flux leakage testing based on circumferential magnetization is applied to test of industrial pipelines. The design of the magnetizer is the key of the magnetic flux leakage testing based on circumferential magnetization. In order to optimize it, the distribution of magnetic induction field in pipelines under circumferential magnetization is simulated and studied based on 3D finite element analysis. The influences of magnetizer parameters, such as the thickness and width of the magnet, the thickness of the armature, and the pole spacing, are analyzed; and the correlation curves of magnetic induction below the pipe detection probe and the size of the uniform magnetization region which changing with the magnetizer parameters and the magnets lift-off are obtained. The magnetization designed by the finite element method is verified by experiments, and the experiments show that the magnetizer satisfies detection requirements.
出处
《中国特种设备安全》
2015年第10期9-14,18,共7页
China Special Equipment Safety
基金
国家重大科学仪器设备开发专项基金资助项目:2012YQ090175
关键词
管道
漏磁检测
周向磁化
磁化器
有限元
Pipelines
Magnetic flux leakage
testing Circumferential magnetization
Magnetizer
Finite element method
