A pipe sealing device

Abstract

The invention relates to a pipeline plugging device which comprises a wall clamping mechanism and a plugging mechanism. The wall clamping mechanism comprises a clamping cylinder and a tapered plug pipe; an extrusion part or a capping part of the plugging mechanism is arranged at the front end of the clamping cylinder; the tapered plug pipe is clamped and fixed into a clamping cylinder tapered channel and can move front and back; the back end of a rotary rod is rotatably connected with a rotary seat of the tapered plug pipe; the front section of the rod penetrates through the top end of a portof a clamping seat, a movable clamping plate or a seal plate so as to be clamped and fixed; and the rotary rod is rotated, the tapered plug pipe moves forwards to extrude a clamping part in the clamping cylinder tapered channel to outwards stretch radially, the movable clamping plate moves backwards so as to extrude a clamping cylinder vertical plate, and a ring gasket between the two plates is radially expanded, or an elastic stretching glue port at the front end of the clamping cylinder is extruded by the seal plate so as to be extended radially. According to the pipeline plugging device provided by the invention, the wall clamping mechanism can be tightly clamped and fixed with a pipe wall; a way of elastically separating parts is adopted for releasing water and reducing pressure, so that the problem of difficulty in moving, installing and disassembling the equipment in a pipeline under the high-pressure fluid state is solved; and by adopting a way of using the clamping plate at thefront end to extrude a glue cushion so as to expand radially or using the seal plate to extrude the elastic stretching glue port, the pipeline is sealed without leakage. The pipeline plugging deviceprovided by the invention is simple in manufacturing process, and selects light-weight metal and plastic materials so as to be low in cost, and multiple models can be applied to plugging multiple pipediameters.

Description

technical field [0001] The invention relates to the technical field of pipeline sealing, in particular to a pipeline sealing device. Background technique [0002] In municipal engineering and daily life, pipeline damage is often encountered, and the pipeline needs to be partially blocked and repaired. It is difficult to seal when the fluid pressure in the pipeline is high. Traditional pipeline sealing mostly uses sealing airbags. For water, use a pipeline made of high-quality rubber to block the airbag, and inflate it to expand. When the gas pressure reaches the specified requirements, the water-blocking airbag fills the entire section of the pipeline, and uses the friction generated by the pipeline to block the wall of the airbag and the pipeline to block. Leakage, so as to achieve the purpose of no water seepage in the target pipe section. However, when the pressure of the fluid pipeline is high, the friction force generated by the sealing method of the sealing air bag is...

AI Technical Summary

Problems solved by technology

However, when the pressure of the fluid pipeline is high, the friction force generated by the sealing method of the sealing air bag is not enough to overcome the fluid pressure, although people have also carried out innovative explorations in this area, such as the invention patent in the national patent library "a pipeline sealing device "(Patent No.: 201611161223 1) The expansion and contraction deformation of the expansion ring is driven by the operating mechanism, so that the elastic sealing cap is sealed in the pipe near the nozzle, but there are still complex structures, high manufacturing costs, and high pressure fluid conditions. Therefore, there is an urgent need for a general-purpose equipment that is firmly clamped, solidly sealed, simple in structure, easy to operate, and suitable for various pipe diameters for urban and rural pipe network construction.

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