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Sealing part and sealing monitoring process for repaired pipeline branch-pipe holing

A technology for seals and pipelines, applied in the field of pipeline repair and transformation, can solve the problems of increased pipeline safety operation, hidden dangers, and failure to construct, achieve timely and accurate sealing monitoring, and reduce the probability of leakage accidents

Inactive Publication Date: 2019-04-16
HENAN ZHONGTUO PIPELINE ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above branch pipe connection structures all require the opening of the main pipe. With the development of cities and towns, more and more pipes have been repaired without excavation using PE lining pipe technology in recent years. However, the repaired pipes have PE lining inside. It is impossible to directly open holes to connect branch pipes. It is necessary to disconnect the old main pipe and PE lining pipe, and install new three-way pipe fittings in the middle, so that new pipe breakpoints need to be added. Faced with other above-ground and underground facilities around and not enough space for construction, on the other hand, it adds new hidden dangers to the safe operation of the pipeline

Method used

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  • Sealing part and sealing monitoring process for repaired pipeline branch-pipe holing
  • Sealing part and sealing monitoring process for repaired pipeline branch-pipe holing
  • Sealing part and sealing monitoring process for repaired pipeline branch-pipe holing

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Experimental program
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Effect test

Embodiment 1

[0037] The sealing cavity 11 described in this embodiment is located between the through hole 2 and the middle through hole 3 on the annular rubber sealing gasket 1, and the sealing cavity is arranged here, so that the tightness monitoring around the middle through hole 3 is more accurate. Timely and precise. Use the seal provided by this embodiment to be used for the seal detection process of the opening of the branch pipe of the repaired pipeline. The construction process is as follows: Figure 4 shown, including the following steps:

[0038] a. Determine the opening position of the old pipeline 6, cut off the PE liner 7 at the place where the old pipeline 6 is to be opened, and the PE liner 7 opening size after cutting is the same as the outer diameter of the branch pipe mouth;

[0039] b. Pry open the PE lining pipe 7 and the old pipe 6 at the opening of the branch pipe, and place the prepared annular rubber sealing gasket 2 10 in the interlayer between the PE lining pipe...

Embodiment 2

[0047] The difference from Embodiment 1 is that in this embodiment, the sealing cavity 11 is located on the side of the through hole 2 on the annular rubber sealing gasket 1 away from the middle through hole 3, and the sealing cavity 11 is arranged here opposite to the saddle-shaped steel ring. A more timely and accurate increase in the tightness monitoring between 5 and PE liner 7.

[0048] In the field construction process, according to the actual situation, the annular rubber sealing ring 2 10 can be replaced by the annular rubber sealing ring 1 provided in the first embodiment with the sealing cavity 11 located between the through hole 2 and the middle through hole 3 .

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Abstract

The invention belongs to the technical field of pipeline repair and transformation and particularly relates to a sealing part applied to metal pipelines and a sealing monitoring process for repaired pipeline branch-pipe holing. The sealing part comprises a saddle-shaped steel ring, a first annular rubber seal pad ring between the saddle-shaped steel ring and a PE liner pipe and a second annular rubber seal pad ring between the PE liner pipe and an old pipeline, all parts of the sealing part are compressed into a whole through drawing force of screw rods after nuts are tightened, the first annular rubber seal pad ring between the saddle-shaped steel ring and the PE liner pipe is used for preventing a conveyed medium inside the pipeline from leaking out of the pipeline through holed positions, and the second annular rubber seal pad ring between the PE liner pipe and the old pipeline is used for preventing the conveyed medium inside the pipeline from leaking into an interlayer between thePE liner pipe and the old pipeline. By means of the process provided by the invention, when holing branch-pipe connection is performed, disconnecting of a main pipeline is not needed, only a small operating area is required, after the holing branch-pipe connection is finished, real-time monitoring can be performed on the sealing situation of joints, and the occurrence probability of leakage accidents is reduced.

Description

technical field [0001] The invention belongs to the technical field of pipeline repair and transformation, and in particular relates to a saddle-shaped fastening seal applied to metal pipelines and a sealing process for opening holes of pipeline branch pipes after repair. Background technique [0002] In the piping design, the branch pipe connection on the pipeline is the most common structural form, and the determination of the branch pipe connection mode is an important content of the pipeline design. Common branch pipe connection structure types include integral pipe fitting type: main pipe and branch pipe are connected through tee pipe fittings; reinforced pipe structure type: main pipe opening, connected with branch pipe through branch pipe connector; welded branch pipe type: main pipe opening, branch pipe directly welded to main pipe . [0003] The above branch pipe connection structures all require the opening of the main pipe. With the development of cities and town...

Claims

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Application Information

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IPC IPC(8): F16L55/163
CPCF16L55/163
Inventor 葛延超杨鹏张严甫
Owner HENAN ZHONGTUO PIPELINE ENG