Load-reducing type active buckling control device of submarine pipeline
A technology for control devices and submarine pipelines, applied in pipeline support, pipeline laying and maintenance, pipes/pipe joints/fittings, etc., can solve the problems of pipeline vibration, pipeline separation from the seabed, contact pressure reduction, etc. The effect of self-weight, avoiding vibration, and reducing the critical buckling force
Pending Publication Date: 2019-04-30
TIANJIN UNIV
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Problems solved by technology
The distributed buoyancy method may cause the pipeline to break away from the seabed, reducing the contact pressure with the seabed, and the pipeline is likely to vibrate under the action of sea current erosion, resulting in unnecessary fatigue and damage
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[0026] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:
[0027] see Figure 1 ~ Figure 4 , an active buckling control device for subsea pipelines with reduced load, including an inflatable high-pressure rubber sleeve 2 sleeved on the pipeline 4, the inflatable high-pressure rubber sleeve 2 is supported on the pipeline 4 through a sealed waterproof bearing 3, and the sealed Both ends of the waterproof bearing 3 and the inflatable high-pressure rubber sleeve 2 are provided with limiting rings 1 , and the limiting rings 1 are fixed on the pipe 1 . In this embodiment, the inflatable high-pressure rubber sleeve 2 is filled with 30-40 atmospheres of nitrogen, which can effectively resist the static pressure of seawater in a water depth of 100 m.
[0028] In the present invention, a sealed waterproof bea...
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The invention discloses a load-reducing type active buckling control device of a submarine pipeline. The load-reducing type active buckling control device of the submarine pipeline comprises an inflatable high-pressure rubber sleeve mounted on the pipeline in a sleeving mode, the inflatable high-pressure rubber sleeve is supported on the pipeline through a sealed waterproof bearing, limiting ringsare correspondingly arranged at two ends of the sealed waterproof bearing and the two ends of the inflatable high-pressure rubber sleeve, and the limiting rings are fixed to the pipeline. According to the load-reducing type active buckling control device of the submarine pipeline, the sealed waterproof bearing can change the sliding friction of lateral pipe soil into the rolling friction in the process of pipeline lateral displacement, thereby reducing the critical buckling force; the inflatable high-pressure rubber sleeve can effectively reduce the underwater self-weight of the pipeline, thereby reducing the lateral pipe soil friction resistance in the process of pipeline lateral buckling; and by controlling the length of the inflatable high-pressure rubber sleeve and the weight of the sealed waterproof bearing, the underwater self-weight of the structure can be effectively controlled, and the contact pressure between the pipeline and the seabed is ensured to avoid the oscillation, fatigue and damage of the pipeline caused by the ocean current scouring.
Description
technical field [0001] The invention relates to an active buckling control device for a submarine pipeline, in particular to a bearing-reducing active buckling control device for a submarine pipeline. Background technique [0002] At present, the active buckling control methods of deep-sea oil pipelines mainly include serpentine laying method, sleeper method, and distributed buoyancy method. [0003] A brief description of the serpentine laying method: [0004] The serpentine pipe laying method was the first to be applied, and it is also a relatively common method to stimulate controlled lateral buckling. By laying the pipeline in a serpentine shape, the initial defects of the pipeline are artificially introduced to guide the lateral buckling of the pipeline in the curved section. [0005] The advantage of the serpentine pipe laying method is that no additional devices need to be installed, the laying speed is fast, and there will be no overhanging section of the pipe, thu...
Claims
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Login to View More IPC IPC(8): F16L1/16F16L1/20F16L3/02
CPCF16L1/16F16L1/20F16L3/02
Inventor 张泽超陈志华刘红波
Owner TIANJIN UNIV