Leather cup type pipeline plugging device

An occluder and leather cup technology, applied in the direction of pipe elements, pipes/pipe joints/pipe fittings, mechanical equipment, etc., can solve the problems of resistance in the recovery process and the lack of strict sealing of the pipe occluder, so as to reduce the resistance and reduce the operation. Convenience, sealing effect is easy to ensure the effect

Inactive Publication Date: 2016-08-17
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Purpose of the present invention: In order to overcome the disadvantages of the existing pipe plugging device, such as the lax plugging and the excessive resistance in the recovery process, a pig for pipe plugging is provided.

Method used

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  • Leather cup type pipeline plugging device
  • Leather cup type pipeline plugging device
  • Leather cup type pipeline plugging device

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Embodiment Construction

[0017] The present invention is not limited by the following implementation examples, and specific implementation manners can be determined according to the technical solutions of the present invention and actual conditions. Combine below Figure 1~3 The present invention is described below. The positional relationship of up, down, left, right, etc. is based on the attached figure 1 determined by the layout direction.

[0018] The leather cup 3 is dish-shaped with a central hole, and the two leather cups 3 are arranged symmetrically at the two ends of the mandrel 8, and the mandrel 8 passes through the central hole of the leather cup 3. The rear end cover 11 is installed at the rear end of the mandrel 8 and is fixed by welding, and the leather cup 3 is pressed on the rear end cover 11 by the mounting ring 4 and is connected with the rear end cover 11 and the mounting ring 4 with bolts. The front end of the mandrel 8 is equipped with the front end cover 2 and is threaded, an...

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PUM

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Abstract

The invention relates to a leather cup type pipeline plugging device which is used for the welding operation of an in-service pipeline. The invention adopts the technical scheme that a front end cover and a rear end cover are mounted at the end part of a core shaft; a leather cup is fixed on each of the front end cover and the rear end cover; sliding sleeves sleeve the middle positions of the core shaft; the edges of the cups and the sliding sleeves are connected by supporting rods; an air cylinder is arranged between the two sliding sleeves. The leather cup type pipeline plugging device provided by the invention adopts a mechanical and pneumatic system and is free from an electric control part and higher in the use safety of an oil and gas pipeline; through necking recovery, the resistance in the recovery process is reduced.

Description

technical field [0001] The invention relates to a leather cup type pipeline plugging device, which is used for pipeline welding operation and seals off the cut-off part of the pipeline. Background technique [0002] In oil and gas storage and transportation and urban gas projects, long-distance large-diameter pipelines need to be laid for oil and natural gas transportation. For oil and gas pipelines in service, as the service life of the pipeline increases, the pipeline may be damaged and defective due to factors such as corrosion, fatigue and mechanical damage. , or due to urban construction and other reasons that require the rerouting of in-service pipelines, etc., it is necessary to re-weld new pipelines after part of the in-service oil and gas pipelines are cut off. Oil and gas are replaced or blocked. [0003] Existing hot-fire technologies mainly include hot-fire displacement technology and safety-blocking hot-fire technology. Among them, nitrogen replacement technolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L55/105
CPCF16L55/105
Inventor 张梁刘稳邓严邓兰何虹钢
Owner SOUTHWEST PETROLEUM UNIV
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