Detection System for Damaged Points of Pipeline Inner Coating Based on Pulsed Electric Spark
-
摘要: 针对传统内涂层检测仪仅限于检测未焊接管段和大直径管道的问题,研制了一种基于脉冲电火花的内涂层破损点检测系统。针对现场对检测距离的要求,采用气压泵做动力源,并设计了动力皮阀结构,使得检测距离达到十几千米;针对管径仅有8 cm的实际情况,将本检测系统设计为四节,各节分别安装微型脉冲变压器,微型脉冲高压驱动电路,微型主控电路和高容量锂电池。软硬件联合调试表明,本检测系统运行可靠稳定,能够自动检测微弱脉冲电流,识别内涂层破损点,且具有检测距离长、结构小巧的特点。Abstract: Aiming at the problem that the traditional inner coating detector is limited to the detection of unwelded pipe sections and large-diameter pipes, a detection system for damaged points of inner coating based on pulsed electric spark was developed. To meet the requirements of the detection distance on-site, a pneumatic pump is used as the power source, and a power valve structure is designed to ensure that the detection distance can reach more than ten kilometers. For the actual situation that the pipe diameter is only 8 cm, the detection system is designed into four sections. Each section is installed with a miniature pulse transformer, miniature pulse high voltage drive circuit, miniature main control circuit, and high capacity lithium battery. The results of the joint debugging of software and hardware show that the detection system is reliable and stable, and can automatically detect weak pulse currents and identify damaged points of the inner coating, and has the characteristics of long detection distance and compact structure.
-
表 1 100 m实验管道的检测数据
Table 1. Test data of 100 m experimental pipe
破损点的实
际数量/个系统检测
数量/个5个破损点时的
实际位置/m5个破损点时系
统的检测位置/m2 2 20 19.8 4 4 40 40.1 5 5 60 60.3 8 8 80 80.2 10 10 90 90.5 表 2 1300 m实际管道的检测数据
Table 2. Inspection data of 1300 m actual pipeline
测量序号 破损点检测数量/个 破损点的检测位置/m 1 4 16.5;345.5;765.9;1120.6 2 4 16.2;344.9;763.5;1118.2 3 4 16.6;345.7;767.4;1123.1 -
[1] 王占山, 张化光, 冯健. 长距离流体输送管道泄漏检测与定位技术的现状与展望[J]. 化工自动化及仪表, 2003(5): 6-11. [2] 杨东红. 电火花放电状态检测技术研究及其意义[J]. 科技资讯, 2009(14): 1. doi: 10.3969/j.issn.1672-3791.2009.14.001 [3] 周永江, 程海峰, 陈朝辉. 测量材料电磁参数的多样品法[J]. 计量技术, 2006(11): 15-18. [4] 张锋, 耿皎, 马少玲. 利用电容法测量降膜厚度[J]. 计量技术, 2005(5): 34-35. [5] 郭亮, 姜文聪, 刘广孚. 基于磁生电耦合的电导率测量实验装置[J]. 实验室研究与探索, 2015, 34(6): 72-76. doi: 10.3969/j.issn.1006-7167.2015.06.019 [6] 欧阳涛, 段发阶, 张玉贵. 磁电式脉冲传感器原理与叶尖定时误差分析[J]. 计量技术, 2008(4): 3-5. [7] 闫芳. 利用峰值检波器测量脉冲电压的误差分析[J]. 计量技术, 2005(7): 31-32. [8] 李傲梅, 傅鹏, 王林森. EAST装置变流系统脉冲功放电路的改进[J]. 化工自动化及仪表, 2007, 34(1): 84-85. doi: 10.3969/j.issn.1000-3932.2007.01.020 [9] 苏水金, 徐力. 高速脉冲高功率放大器脉冲参数测试方法[J]. 计量技术, 2018, 532(12): 36-38. [10] 郝宪锋, 成向阳, 贾朋. 一种基于NIOS的双极性相控脉冲高压信号源设计[J]. 实验室研究与探索, 2017(2): 69-73. [11] 王嘉祺. 浅谈位移电流[J]. 电子技术与软件工程, 2016(11): 129-130. [12] 应仙茶. 微型电流互感器在静止式电能表中的应用[J]. 计量技术, 2003(10): 8-10. [13] 彭学斌. 提高实际负载下检定电流互感器误差的准确性[J]. 计量技术, 2002(12): 18-20. [14] 凌建, 包玉树. 关口计量用互感器“隐性误差”的影响因素分析[J]. 计量技术, 2007(12): 69-71. [15] 王 蒙, 张文朝, 高享想. 基于积分法和差分法的电力装置短路电流直流分量特征参数计算[J]. 高压电器, 2018(12): 280-285.