The invention provides an
interdiction method and device for a pressurized pipeline. The device consists of a
slag collecting tube, a process tube, a reblading device, a pipeline pressurized tapping
machine and a pipeline blocker. The pressurized pipeline consists of an upper
welding process tube, a lower
welding process tube and the
slag collecting tube. The process tubes are arranged above the
slag collecting tube. The upper end of the process tube is provided with a
flange and is connected with flanges at the lower ends of the tapping
machine, the reblading device and the pressurized pipeline blocker through the
flange. Compared with the prior art, the
welding type pressurized pipeline blocker has excellent effects of realizing the pressurized connection of
branch pipes and the pressurized connection of bypasses, the pressurized replacement of valves, the pressurized replacement of pipelines, as well as the maintenance and replacement of the pressurized pipelines, with no need of depressurizing pipelines or stopping production and no effect on the normal medium transmission of the pipelines. The invention is convenient, portable and has the advantages of low cost and
high security, solving the unsolved world difficulty of the pipeline maintenance and pressurized construction, thus having excellent popularization and using values.