Marine flexible tube cable bend limiter with annular cavity

A technology of annular cavity and bend limiter, which is applied in the direction of pipeline protection, pipe/pipe joint/pipe fitting, pipeline damage/abrasion prevention, etc. Problems such as wear and tear, heat generation, and changing the external heat transfer efficiency of the umbilical cable can reduce the stress fatigue effect of the hot spot, the connection form is simple and reasonable, and the effect of increasing the reliability of the connection is achieved.

Pending Publication Date: 2019-09-06
DALIAN UNIV OF TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional bend limiter installed outside the umbilical cable changes the heat transfer efficiency outside the umbilical cable; it may cause the wear and tear of each layer of the umbilical cable to generate heat and electric heat cannot be removed in time, so that the temperature of the main body of the umbilical cable rises, causing the cable carrying capacity to decrease or The seepage resistance rate of the outer wall of the pipeline is reduced
In addition, the wall thickness of the semi-circumferential cylindrical structure of the bending limiter changes too much and is discontinuous, so that the rigidity is discontinuous, which leads to hot spot fatigue failure

Method used

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  • Marine flexible tube cable bend limiter with annular cavity
  • Marine flexible tube cable bend limiter with annular cavity
  • Marine flexible tube cable bend limiter with annular cavity

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Embodiment Construction

[0026] The patent of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] figure 1 , figure 2 with image 3 The overall structure and connection method of the marine flexible umbilical bend limiter with annular cavity described in the present invention is given as an example, and those skilled in the art can fully understand that any number of bend limiters can be used in actual use according to figure 1 , figure 2 with image 3 The methods shown are connected sequentially.

[0028] figure 1 It exemplarily describes the connection mode between two semi-circumferential cylindrical units 1 and semi-circumferential cylindrical units 2 of a bend limiter; the two units reserve the same bolt holes 7 in the normal direction of the assembly surface , by a plurality of bolts 8, nuts 9 to complete the connection.

[0029] figure 2 The connection relationship between the first bend restrictor main body...

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Abstract

The invention discloses a marine flexible tube cable bend limiter with an annular cavity, and belongs to the technical field of marine engineering flexible tube cables. The marine flexible tube cablebend limiter comprises n bend limiter bodies; each bend limiter body is formed by connecting completely identical semi-circle cylindrical single bodies; each section of the bending limiting device main body is composed of a male head, a neck section and an annular cavity section, the female head section and the third part are of an integrated forming structure; the contour line of the inner surface of the annular cavity section is a spline curve. The marine flexible tube cable bend limiter with the annular cavity breaks through the configuration of a traditional limiter, and a completely identical semi-circular cylindrical monomer is used and an annular cavity is added; so that the heat dissipation efficiency is high, the hot spot stress fatigue is resisted, the raw materials are saved, and the connection mode is simple and reliable.

Description

technical field [0001] The invention belongs to the technical field of marine engineering flexible umbilical cables, and relates to a protection method for excessive bending failure modes of flexible umbilical cables used in marine engineering. Background technique [0002] With the continuous development of offshore resource development, flexible pipelines and flexible umbilicals (hereinafter referred to as "flexible umbilicals") are more and more widely used. Generally, the flexural rigidity of the flexible umbilical cable for marine engineering is relatively small, and it has good compliance to the bending load borne by the flexible umbilical cable during construction, in-position or maintenance. This also causes the flexible umbilical cable to be easily over-bent in actual engineering applications, and a bend limiter is generally used to ensure safety during its application. [0003] Due to the advantages of flexible installation and small space requirements, the bend l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L57/02
CPCF16L57/02
Inventor 丁乐声陈金龙张聪冯梦珂张陶石鸿毅王朋岳前进
Owner DALIAN UNIV OF TECH
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