磁力组合式管道带压堵漏器的研制与应用

Development and application of magnetic-combination pressurized pipeline leakage blocking units

为提高大口径油气管道发生事故时的应急抢修效率,把损失降到最小,需研发一套适合大口径油气管道带压堵漏的设备。现有带压堵漏器抢修时存在体积过大、土方开挖量过多、焊接时间长、抢修效率低等缺陷。从带压堵漏器的结构改进、稀土永磁铁的选用及连接机构的设计3方面进行研发,研制出的磁力组合式管道带压堵漏器将强力磁铁引入堵漏技术,适用于大口径管道的带压堵漏抢修,结构简单,体积小、重量轻,操作方便,可提高抢修效率,有效缩短抢修时间。

In order to increase emergency repair efficiency and minimize the loss when accidents happen in large=diameter pipelines, it is necessary to develop a pressurized leakage blocking unit that is suitable for this type of pipelines. In the process of emergency repair, however, existing pressurized leakage blocking units are disadvantageous because they are too large and involve excessive amount of earth excavation, long welding duration and low repair efficiency. In this paper, research and development was carried out from the aspects of structural improvement of pressurized leakage blocking units, selection of rare-earth permanent magnets （REPM） and design of connecting mechanisms. The newly developed magnetic- combination pressurized pipeline leakage blocking unit is suitable for leakage blocking and emergency repair of large- diameter pipelines thanks to the introduction of Nd-Fe-B magnets into leakage blocking technologies. It is characterized by simple structure, small size, light weight and convenient operation. Based on this unit, emergency repair time can significantly be shortened, hence emergency repair efficiency can be increased.