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Reducing spherical plugging device

A occluder and variable-diameter technology, which is applied in the field of variable-diameter spherical occluders, can solve problems such as poor sealing of pipeline occluders and resistance in the recovery process, and achieve convenient operation, reduced resistance, and high safety Effect

Inactive Publication Date: 2017-02-15
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 shortcomings of the existing pipeline occluder, which are not strict in sealing and the resistance in the recovery process is too large, a variable-diameter spherical occluder is specially provided

Method used

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Embodiment Construction

[0018] 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 1~4 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.

[0019] The housing 4 is a rubber spherical shell, and an injection joint 7 is installed in the housing 4 . The injection joint 7 communicates with the outside of the housing 4 , and liquid is injected into the housing 4 through the injection joint 7 . The casing 4 is provided with a vent hole 5, which is arranged above the installation position of the casing 4. When the liquid is injected into the casing 4 through the injection joint 7, the air in the casing 4 passes through the vent hole 5 Discharge, close the air vent 5 after the air is discharged.

[002...

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Abstract

The present invention relates to a reducing spherical plugging device for the welding operation for an in-service pipeline. A technical solution for the reducing spherical plugging device is as follows: the plugging device is provided with a spherical rubber shell in which an injection connection and an exhaust vent are mounted; a controllable one-way valve and a vibrating switch are disposed within the housing; the vibrating switch is disposed at a cantilever end of the vibrating rod; and an eccentric block is mounted on an output shaft of a motor that is disposed outside a pipeline corresponding to a mounting position of the plugging device of the present invention. The plugging device of the present invention is retrieved by the way of reducing, such that resistance in the retrieval process can be reduced; and without an electric control part, the plugging device has higher use safety for oil and gas pipelines.

Description

technical field [0001] The invention relates to a variable-diameter spherical plugging device, which is used for plugging off the cut-off part of the pipeline during the welding operation 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 r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K37/00
CPCB23K37/00B23K2101/06
Inventor 张梁刘稳邓严邓兰何虹钢
Owner SOUTHWEST PETROLEUM UNIV
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