油气管道非饱和磁化应力检测技术研究
Unsaturated Magnetization Stress Detection Technology for Oil and Gas Pipelines
陈潇 1辛佳兴 2苏政达 3史徐武 4何仁洋 2刘畅 2陈金忠2
作者信息
- 1. 江苏省特种设备安全监督检验研究院
- 2. 中国特种设备检测研究院
- 3. 中广核研究院有限公司
- 4. 北京燃气绿源达清洁燃料有限公司
- 折叠
摘要
应力集中是在役油气管道损伤、失效的重要原因,为能源的输送安全埋下巨大隐患.为此,提出一种非饱和磁化管道应力检测新方法,分析了非饱和磁化油气管道应力检测机理,推导获得了应力检测等效磁路模型,利用有限元方法探究了屏蔽层对应力响应信号的影响规律,对X52 管道钢试件在0～140 MPa范围内进行拉伸应力检测试验,验证了非饱和磁化检测探头对试件应力状态的感知能力.研究结果表明:随磁屏蔽层长度增加,信号畸变度持续增加,但梯度值减小;随磁屏蔽层厚度增加,信号畸变度先增加后减小;拉伸应力与响应信号呈现负相关的线性变化趋势.研制的检测探头对应力状态感知的灵敏度达到 18.48 mV/MPa.研究成果可为管道应力集中在线检测探头及装备研制提供参考.
Abstract
Stress concentration is a key cause for damage and failure of in-service oil and gas pipelines,lay-ing a huge hidden danger for the safety of energy transportation.In this paper,a new method for stress detection in unsaturated magnetized pipelines was proposed.The stress detection mechanism of unsaturated magnetized oil and gas pipelines was analyzed,and an equivalent magnetic circuit model for stress detection was derived.The influ-ence of shielding layer on stress response signals was investigated using finite element method;and tensile stress de-tection tests were conducted on X52 pipeline steel test specimens in the range of 0-140 MPa to verify the sensing a-bility of the unsaturated magnetization detection probe on the stress state of the test specimens.The research results show that as the length of the magnetic shielding layer increases,the signal distortion degree continues to increase,but the gradient value decreases.As the thickness of the magnetic shielding layer increases,the signal distortion degree first increases and then decreases.The tensile stress shows a linear variation trend of negative correlation with the response signal,and the sensitivity of the developed detection probe for the perception of stress state rea-ches 18.48 mV/MPa.The research results provide reference for the development of online detection probe and e-quipment for pipeline stress concentration.
关键词
油气管道/应力检测/非饱和磁化/等效磁路/屏蔽Key words
oil and gas pipeline/stress detection/unsaturated magnetization/equivalent magnetic circuit/shielding引用本文复制引用
基金项目
国家"十四五"重点研发计划(2022YFC3070102)
国家市场监督管理总局科技创新人才计划创新领军人才项目(KJLJ202320)
中国特检院青年科技英才项目(KJYC-2023-10)
出版年
2024
NETL
NSTL
万方数据