掺氢天然气管道氢损伤管外漏磁检测机构设计  

Design of Magnetic Flux Leakage Detection Mechanism for Hydrogen Damage Outside Pipes of Hydrogen-Doped Natural Gas Pipelines

作　　者：陈子俨 赵弘[1] CHEN Ziyan;ZHAO Hong(College of Mechanical and Transportation Engineering,China University of Petroleum(Beijing),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：《机床与液压》2024年第15期75-81,共7页Machine Tool & Hydraulics

基　　金：国家自然科学基金面上项目(51575528);中国石油大学(北京)前瞻导向及培育项目(2462022QEDX011)。

摘　　要：掺氢天然气管道受氢损伤等因素影响,容易产生缺陷进而导致管道失效,因此需要定期对掺氢管道进行检查。通过对掺氢管道的主要缺陷产生机制和缺陷特征进行分析,得到主要的缺陷形式,设计一种针对掺氢管道氢损伤的管外漏磁检测机构对管道进行缺陷检测,利用Maxwell进行漏磁检测仿真模拟,采用响应面法建立检测探头各参数与轴向漏磁曲线峰谷差值、吸附力和成本之间的函数,得到探头的结构参数最优组合。最后搭建实验台,利用单组探头进行单通道的漏磁检测。结果表明:与未优化结构对比,优化后管外缺陷检测效果提高26.2%,管内缺陷检测效果提升11%,探头与管壁吸附力降低56.7%,探头成本降低14%,检测效果得到提升;优化探头不仅能检测到已成型的比较明显的掺氢管道缺陷,也可以在缺陷形成早期管壁损失达到整体壁厚40%时将其检测出来。缺陷检测实验验证了文中设计方案的可行性。Hydrogen-doped natural gas pipelines is affected by hydrogen damage and other factors,which is easy to produce defects and lead to pipeline failure,so it is necessary to check the hydrogen-doped pipeline regularly.The main defects generation mechanism and defect characteristics of hydrogen-doped pipelines were analyzed,and the main defect forms were summarized.An external magnetic flux leakage detection mechanism was designed for hydrogen damage in hydrogen-doped pipelines to detect defects in pipelines,and Maxwell software was used to simulate magnetic flux leakage detection.The function between the parameters of the detection probe and the peak-valley difference of the axial magnetic leakage curve,adsorption force and cost was established by the response surface method to optimize the probe structure parameters.At last,an experimental platform was set up and a single probe was used to detect the magnetic flux leakage in a single channel.The results show that compared with the non-optimized structure,the detection effect for defects outside the pipelines is increased by 26.2%,and the detection effect for defects inside the pipeline is increased by 11%,the adsorption force between probe and pipeline wall is reduced by 56.7%,the probe cost is reduced by 14%,so the detection effect is improved after the optimization.The optimized probe can not only detect defects in formed and more obvious hydrogen-doped pipes,but also detect defects when the wall loss reaches 40%of the overall wall thickness in the early stages of defect formation.The feasibility of the design scheme is tested by defect detection.

关 键 词：漏磁检测 掺氢管道 外检测 探头结构优化 响应面法 

分 类 号：TH137[机械工程—机械制造及自动化] TE832[石油与天然气工程—油气储运工程]