钻杆焊缝超声自动探伤工艺研究与应用

发布时间：2018-03-12 17:43

本文选题：钻杆焊缝　切入点：超声波　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：钻杆焊区是钻杆上的薄弱环节,经常发生断裂或刺漏等钻具事故,对焊区进行超声波检测是发现内部横、纵向缺陷的主要手段之一。手持便携式超声波检测仪进行检测的手动检测方式已经不能适应工作需求,多通道同时检测是提高工作效率和降低工人劳动强度的必然选择。本文从修复性摩擦焊钻杆检修工艺流程入手,仔细分析了各工序可能产生的主要缺陷,针对缺陷制定相应的检测工艺,并从节约人力资源的角度出发,设计了自动化检测工艺流程。研究了目前先进的FPGA门阵列和DSP双极处理技术,提出了多通道同时检测钻杆焊区中的三种取向缺陷,实现多通道同时检测,分通道实时处理,消除了缺陷信号等待处理和相互干扰的担忧。设计的检测软件实时显示钻杆焊区的检测状况,并可打印查看历史数据。在多次检测试验的基础上,实现了钻杆焊区检测的标准化,确保了检测结果的准确率和一致性。本文提出了用机械装置代替手动操作的构想,并通过钻杆自动上料系统、探头行走支架系统和耦合剂自动喷洒装置,实现全自动检测,整个检测只需1人即可独立完成,大大提高了工作效率和人员劳动强度。通过大量的现场验证试验,证明钻杆焊区自动检测装置的漏检率为零,误判率为零,波形重复率大于90%。
[Abstract]:The welding zone of drill pipe is the weak link on the drill pipe. One of the main methods of longitudinal defects. The hand-held portable ultrasonic detector for manual detection can no longer meet the needs of the work. Multi-channel simultaneous detection is an inevitable choice to improve the working efficiency and reduce the labor intensity of workers. This paper begins with the repair process of the repair friction welded drill pipe, and carefully analyzes the main defects that may occur in each working procedure. In view of the defects, the corresponding detection process is established, and the automatic detection process is designed from the point of view of saving human resources. The advanced FPGA gate array and DSP bipolar processing technology are studied. In this paper, three kinds of orientation defects in drill pipe welding zone are detected simultaneously with multi-channel, and multi-channel simultaneous detection and real-time processing of sub-channel are realized. The designed detection software can display the detection status of drill pipe welding zone in real time, and print and view historical data. On the basis of many testing experiments, The standardization of drill pipe welding zone detection is realized, and the accuracy and consistency of test results are ensured. In this paper, the idea of replacing manual operation with mechanical device is put forward, and the automatic feeding system of drill pipe is adopted. The probe walking support system and the coupling agent automatic spraying device can realize the automatic detection. The whole detection can be completed independently by only one person, which greatly improves the working efficiency and the labor intensity of the personnel. Through a large number of field verification tests, It is proved that the leakage rate is zero, the error rate is zero, and the repetition rate of waveform is more than 90.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE921.2

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