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针对管道不停输带压开孔时,鞍形板变形或设备操作失误可能导致鞍形板坠落管道的问题,进行了鞍形板探测打捞技术研究。准确探测鞍形板的位置是实现成功打捞鞍形板的关键环节,研究确定将打捞分成“探测”和“打捞”两步进行。经方案比选,确定采用“可视探测+磁铁吸附法”打捞方案。设计的管道高压可视化探测装置,可准确地确定鞍形板偏移的距离和方位。由磁铁和能灵活调节磁铁空间位置的连杆机构组成的打捞装置,可顺利地打捞出鞍形板。经大量试验验证,该技术适用于打捞管道内鞍形板偏移距离不超过其直径1/3的鞍形板,其成功应用于西气东输定远压气站探测打捞工程,避免了管道放空打捞鞍形板造成的巨大经济损失。
Aiming at the problems that the saddle-shaped plate falls down when the pipe is pressed with open holes, the saddle plate deformation or equipment operation error may cause the saddle plate to fall down the pipeline, and the researches on the salvage technology of the saddle plate are carried out. Accurate detection of the saddle plate position is the key to successful recovery of the saddle plate, the study determined to be salvaged into “exploration ” and “salvage ” two steps. The program than the election, to determine the use of “visual detection + magnet adsorption method ” salvage program. Designed high-pressure pipeline visualization detection device that can accurately determine the saddle plate offset distance and orientation. A salvage device consisting of a magnet and a link mechanism capable of flexibly adjusting the position of the magnet can smoothly recover the saddle plate. After a large number of tests, this technique is suitable for retrieving the saddle plate whose saddle plate offset distance is not more than 1/3 of its diameter in the salvage pipelines. It is successfully applied to the exploration and salvage project of the far-pressure gas station of West-East Gas Pipeline and avoids venting Salvage saddle plate caused huge economic losses.