带气燃气管道推拉式内检测方法与装置  

Push-pull Internal Inspection Method and Device for In-service Gas Pipeline

作　　者：李小双 田晓江[1] 陈哲 刘敏[1] 欧正宇 韩赞东[1] LI Xiaoshuang;TIAN Xiaojiang;CHEN Zhe;LIU Min;OU Zhengyu;HAN Zandong(Beijing Gas Group Co.,Ltd.)

机构地区：[1]北京市燃气集团有限责任公司

出　　处：《管道技术与设备》2024年第2期38-41,共4页Pipeline Technique and Equipment

摘　　要：为实现对带气情况下的中低压、小直径燃气管道进行有效的缺陷检测,提出了一种推拉式内检测方法与装置。装置通过焊接的方式与待测管道进行连接,装置闸板阀上设有内检测器仓用于存放内检测器以及进行气体置换,扫查检测通过内嵌电缆的玻璃纤维杆将内检测器送入管道实现。内检测器外部支撑设计了导向轮以提升通过性,其检测单元采用基于偏置磁化的涡流检测装置,以提升检测管道外壁缺陷的性能。试验结果表明:开发的推拉式内检测装置可以成功将涡流内检测器送入待测管道,具有良好的通过性,并且能够实现外壁缺陷检测。A push-pull internal inspection method and a device were proposed to achieve effective defect detection of small-diameter,medium-to-low-pressure gas pipelines with gas-carrying conditions.The device was connected to the pipeline to be tested through welding,and there is an internal detector compartment above the gate valve for storing the inner detector and achieving gas replacement.The scan detection was realized by pushing the inner detector into the pipeline through the fiberglass rod with embedded cables.External support of the internal detector incorporated guide wheels to enhance passing ability,and its detection unit employed a bias magnetization-based eddy current testing to enhance the capability of detecting defects on the outer wall of the pipeline.Experimental results demonstrate that the developed push-pull internal inspection device can successfully push the eddy current detector into the pipeline,exhibiting excellent passing ability.Moreover,it can detect defects on the outer wall of the pipeline.

关 键 词：城市燃气管道 小直径 推拉式 内检测 涡流检测 

分 类 号：TE98[石油与天然气工程—石油机械设备]