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Underwater butt-joint method for pipelines

An underwater docking and pipeline technology, applied in pipeline laying and maintenance, pipes/pipe joints/pipe fittings, mechanical equipment, etc., can solve problems such as poor applicability, and achieve high docking efficiency, easy operation, and a wide range of applicable water depths.

Active Publication Date: 2017-09-15
CCCC FOURTH HARBOR ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When installing underwater HDPE pipes, the process of segmented installation and underwater docking is often used. The traditional HDPE pipe underwater docking technology is still limited to small diameter (below 630mm) pipe sections, and for large diameter or even super large diameter HDPE pipelines, these The applicability of underwater docking technology is poor

Method used

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  • Underwater butt-joint method for pipelines

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Embodiment Construction

[0027] like Figure 1 to Figure 6 As shown, the present invention discloses a method for underwater docking of pipelines, including an installed pipeline 1, a pipeline to be installed 2 and a barge 3. The barge 3 is provided with a crawler crane 4 and a hoist 5. The docking of the installed pipeline 1 The ends are provided with flanges, and the butt ends of the pipelines 2 to be installed are all provided with flanges, and the following steps are also included: S1: use the air bag 6 to lift the butt end of the installed pipeline 1, and the installed pipeline 1 Install the pulling and closing device 10 and the limiting device 11 at the butt end; S2: Remove the blind plate and sand retaining plate of the butt end of the installed pipeline 1, and perform irrigation and settlement on the installed pipeline 1; S3: The pipeline 2 to be installed is irrigated and settled through The crawler crane 4 makes the pipeline 2 to be installed correspond to the height of the installed pipelin...

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Abstract

The invention provides an underwater butt-joint method for pipelines. The underwater butt-joint method for the pipelines includes the following steps that S1, an air bag is used for lifting up the butt-joint end of the pipeline which has been installed, and a pulling closing device and a limiting device are installed; S2, a blind plate and a sand blocking plate of the butt-joint end of the pipeline which has been installed are disassembled, and the pipeline which has been installed is subjected to watering sedimentation; S3, a to-be-installed pipeline is subjected to watering sedimentation; S4, the butt-joint end of the to-be-installed pipeline is provided with a fixture which is provided with rolling wheels; S5, a steel wire rope of a winch penetrates the fixture of the butt-joint end of the to-be-installed pipeline, and is connected with the pulling closing device of the butt-joint end of the pipeline which has been installed; S6, the steel wire rope of the winch is tightened to make the to-be-installed pipeline attached to the pipeline which has been installed; S7, flange plates at the two ends are subjected to coarse positioning through a steel screw rod; S8, fixing bolts matched with the flange plates are installed and are tightened; and S9, the air bag is sequentially released in the direction of the pipeline which has been installed, the pipelines sink and are placed, and butt joint of the pipelines is completed.

Description

technical field [0001] The invention relates to the field of underwater pipeline laying, in particular to an underwater docking method for pipelines. Background technique [0002] High-density polyethylene pipes (hereinafter referred to as HDPE pipes) are widely used in many fields such as water supply (diversion) systems, drainage systems and gas transmission. When installing underwater HDPE pipes, the process of segmented installation and underwater docking is often used. The traditional underwater docking technology of HDPE pipes is still limited to small-diameter (below 630mm) pipe sections, and for large-diameter or even super-large diameter HDPE pipelines, these The applicability of underwater docking technology is poor. With the development of economy, the application of large-diameter HDPE pipelines is bound to be more extensive, so it is urgent to develop an underwater docking method suitable for large-diameter HDPE pipelines. SUMMARY OF THE INVENTION [0003] I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L1/26
CPCF16L1/26
Inventor 陈猛周爱军马亿光明梁邦炎井阳薛林虎冯振周周扬刘凯甘世行张哲瀚谢学文黄志敏
Owner CCCC FOURTH HARBOR ENG CO LTD
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