An Integral Buckle Stopper with Variable Wall Thickness and Side Plates

Abstract

The invention belongs to the technical field of deepwater submarine pipeline manufacture, laying and mounting and relates to a varied-wall-thickness integrated buckle arrestor with side plates. The varied-wall-thickness integrated buckle arrestor comprises a buckle arrestor body which is fixed outside a submarine pipeline. The thickness of two ends of the buckle arrestor body is 2-4 times of that of the pipeline and gradually decreases to the middle. The buckle arrestor further comprises four side plates which are fixed between the outer wall of the middle of the buckle arrestor body and the inner wall of the pipeline and superposed on the axis of the pipeline, and the adjacent side plates are spaced by a 90-degree central angle. The varied-wall-thickness integrated buckle arrestor with the side plates can guarantee buckle arresting effect, and total weight of the buckle arrestor is taken into account.

Description

technical field [0001] The invention belongs to the technical field of submarine pipeline laying, and in particular relates to a buckle arrester. Background technique [0002] Under the action of external pressure, the section of a deep-water submarine pipeline with a large diameter-to-thickness ratio is prone to buckling and crushing failure. Under the action of external water pressure, the damage will propagate along the pipeline until it encounters obstacles such as valves on the pipeline or the water depth in which the pipeline is located decreases. to a certain value. Buckling propagation may occur during the laying and operation of deepwater pipelines. [0003] When the pipeline is laid into the water, in addition to the air pressure, the pipeline is more subjected to the external water pressure. Pipelines are unloaded during laying, with no internal pressure to balance external pressure, and are therefore more prone to crushing. Therefore, during the laying period,...

AI Technical Summary

Problems solved by technology

[0011] The anti-bending effect of the integral anti-bending device is related to the wall thickness and length of the anti-bending device. The thicker the wall thickness and the longer the length of the anti-bending device, the better the performance of the anti-bending device; but at the same time, it will increase the The weight increases the difficulty in the pipeline laying process, and the overweight buckle arrester will increase the local bending moment stress of the pipeline, which may lead to local buckling of the pipeline

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