油气管道内退磁检测机器人结构设计

Structural Design of Demagnetization Detection Robot in Oil and Gas Pipeline

服役中的油气管道由于各种因素的影响会产生一定的剩磁。为了快速而高效地消除管道剩磁,根据永磁铁动态退磁理论,设计了油气管道内退磁检测机器人。该机器人在管道内自主移动过程中可以对管道进行退磁,并对退磁效果进行检测和记录。利用X80钢管道样品进行试验,并根据试验结果使用响应面法对机器人的退磁效果进行了优化分析。研究结果表明:管道机器人可以通过携带磁体环的方式对管道进行在线退磁;磁体环的退磁效果与磁铁的磁场强度和磁体环相对铁磁材料的运动速度有关,且磁场强度的影响大于运动速度的影响;对于X80钢管道,磁体环单次退磁率可以稳定在30%,当磁场强度为23.7 mT、磁体环运动速度为0.361 m/s时,退磁率可以达到34.5%。研究结果可以为X80钢管道的退磁装置结构设计提供参考和理论依据。

The oil and gas pipelines in service will produce certain residual magnetism due to the influence of various factors.To quickly and efficiently eliminate the residual magnetism,according to the theory of dynamic demagnetization of permanent magnets,a demagnetization detection robot in the oil and gas pipeline was designed.The robot can demagnetize the pipeline in the process of autonomous movement in the pipeline,and detect and record the demagnetization performance.The experiment was conducted using X80 steel pipeline samples,and the demagnetization performance of the robot was optimized and analyzed using the response surface method.The results show that the pipeline robot can demagnetize the pipeline online by carrying a magnet ring.The demagnetization performance of the magnet ring is related to the magnetic field strength of the magnet and the speed of the magnet ring relative to the ferromagnetic material.The influence of the magnetic field strength is greater than the speed of the movement.For the X80 steel pipe,the single demagnetization rate of the magnet ring can be stabilized at 30%.Given the magnetic field strength of 23.7 mT and the moving speed of the magnet ring of 0.361 m/s,the demagnetization rate can reach 34.5%.The research results can provide references and theoretical basis for the structural design of the demagnetization device for X80 steel pipeline.