Quick stopper for long-distance pipeline

Abstract

The invention relates to a quick stopper for a long-distance pipeline orifice. The quick stopper comprises a circular stopping blind plate, a plurality of flitches, an anti-theft gland, a sliding block, an anti-theft preloaded bolt, and an O-ring, wherein the flitches are sequentially distributed on the edge of the inner side of the circular stopping blind plate, and one surface of each flitch fits closely to the circular stopping blind plate; the other surface of each flitch is provided with a guide pin, and the anti-theft gland is arranged at the outer side of the circular stopping blind plate and sequentially penetrates through the circular stopping blind plate and the flitches; an axial groove is formed in the outside of a gland cover, and a through hole is formed in the bottom surface of the axial groove; the sliding block is slidably connected onto the guide pin, and a threaded hole corresponding to the through hole is formed in the sliding block; the tail part of the anti-theft preloaded bolt penetrates through the anti-theft gland, and is screwed out of the threaded hole of the sliding block, and then the anti-theft preloaded bolt is sleeved with a spring and then is positioned by a self-locking nut; the O-ring is arranged in a clamping slot formed between the circular stopping blind plate and an edge bevel of the sliding block. The quick stopper provided by the invention solves the problems that the stopping efficiency is low and the stopping cost is high, and the end face of a pipe section orifice is quickly stopped in the pipeline construction process. The quick stopper has an anti-theft function and a respiratory function, and is suitable for short-term use in long-distance pipeline construction.

Description

technical field [0001] The invention relates to a fast plugging device for the nozzle of a long-distance pipeline with short-term sealing capability in the construction of a long-distance pipeline. Background technique [0002] 10.2.10 of GB50369-2006 "Code for Construction and Acceptance of Oil and Gas Long-distance Pipeline Engineering" clearly requires: "Before get off work every day, the nozzle at the end of the pipeline should be sealed to prevent foreign matter from entering. The pipeline welded under the ditch should also pay attention to waterproofing" . [0003] In the construction process of long-distance pipelines, due to the influence of factors such as turning angles, crossings, and mechanical ditching, the phenomenon of section heads often occurs. Each section of pipeline construction must carry out plugging operations on the nozzles. Therefore, the plugging operation is the construction an important process. A good sealing effect can prevent water, mud or san...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a quick plugging device for the nozzle of a long-distance pipeline that solves the problems of low plugging efficiency and high plugging cost existing in the existing nozzle plugging device, so as to realize the nozzle opening of the pipe section during the pipeline construction process. The end face is quickly blocked, and has anti-theft function and breathing function, suitable for short-term use in long-distance pipeline construction

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