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Pipeline welding and plugging device

A plugging device and pipeline technology, applied in the direction of pipes/pipe joints/fittings, pipe components, flange connections, etc., can solve problems such as replacement problems, time-consuming and labor-intensive replacement and isolation processes, and welding hazards, etc., to improve service life, The effect of avoiding volatilization and improving efficiency

Pending Publication Date: 2021-02-09
PETROCHINA CO LTD
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Problems solved by technology

[0004] However, the process of replacement and isolation is time-consuming and laborious, which affects the progress and cost of pipeline welding operations; in addition, some pipelines cannot be replaced, so welding is extremely dangerous, and replacement has become a problem
Moreover, replacement and isolation cannot effectively avoid flash explosion and combustion caused by volatilization and gasification of the flammable medium attached to the inner wall of the pipeline, which is not conducive to the safety of welding operations and brings safety risks to on-site personnel
In addition, impurities such as welding slag generated by welding operations sometimes enter the pipeline to be connected. Cleaning up impurities further reduces the efficiency of welding operations, and the contact between high-temperature welding slag and the pipeline will affect the service life of the pipeline

Method used

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Embodiment Construction

[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments.

[0049] Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0050] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertic...

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Abstract

The invention provides a pipeline welding and plugging device, and relates to the technical field of pipeline welding. The pipeline welding and plugging device provided by the invention is used for plugging a pipeline when a preset flange and the pipeline are welded. The pipeline welding and plugging device comprises a pull rod, wherein an expansion head is connected to the first end of the pull rod, and an air guide hose is connected to the second end; and a screwing nut sleeves the second end of the pull rod, and the pull rod and the expansion head fixed to the pull rod axially move relativeto the pipeline by rotating the screwing nut so as to seal the pipeline. By using the pipeline welding and plugging device, the safety of welding operation is facilitated. Impurities such as high-temperature welding slags can be prevented from entering the to-be-connected pipeline, and the service life of the pipeline can be prolonged.

Description

technical field [0001] The invention relates to the technical field of pipeline welding, in particular to a pipeline welding sealing device. Background technique [0002] Since oil fields mostly use seamless steel pipes to lay pipe networks, the production and maintenance of oil fields often involves pipe welding operations. Pipeline welding is widely used in pipeline reconstruction. Similarly, it is inevitable to carry out pipeline welding operations in emergency rescue. For example, oil and gas gathering and transportation pipelines are corroded and perforated under the influence of high-salinity formation water, and welding operations are required in the process of replacing damaged pipeline sections. Specifically, the original pipeline and the replacement pipeline need to be connected through a flange, and the fixed connection between the flange and the pipeline needs to be welded. [0003] Welding operations will generate open flames, so the existing technology will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L55/136F16L23/026F16L23/032
CPCF16L55/136F16L23/026F16L23/032
Inventor 顾仲辉金勇才杨帆樊时华徐志民张浩韩同磊王雪梅王亚东訾轩王雅丽王多奇
Owner PETROCHINA CO LTD
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