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Submarine pipeline bending arrestor with stability support and fixing method thereof

A technology for subsea pipelines and fixing methods, which is applied in the directions of pipeline laying and maintenance, pipes/pipe joints/pipes, mechanical equipment, etc. good effect

Inactive Publication Date: 2012-07-04
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The increase of the underwater weight of the pipeline is generally achieved by increasing the thickness of the pipeline concrete counterweight layer. However, the excessive design weight of the pipeline will put forward higher requirements for the pipe laying facilities and methods; and if the pipeline is buried or covered, then Huge construction costs are required

Method used

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  • Submarine pipeline bending arrestor with stability support and fixing method thereof
  • Submarine pipeline bending arrestor with stability support and fixing method thereof
  • Submarine pipeline bending arrestor with stability support and fixing method thereof

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Embodiment Construction

[0036] The invention provides a subsea pipeline buckle arrester with a stable support. The buckle arrester for the submarine pipeline with a stability support mainly includes a spherical buckle arrester located inside and a stability support located outside. The cross-section of the spherical bend arrester is circular, the inner diameter is the same as the inner diameter of the pipe, and the outer diameter of the cross-section changes along the axial direction, gradually shrinking from the middle to both ends, and the outer diameter of the cross-section at both ends is the same as the outer diameter of the pipe. From the appearance, The bend arrester is ellipsoidal in shape. Two shells of equal cross-section with different shapes are outsourced around the spherical buckle arrester, and the two shells are tightly connected by bolts as a stable support. The cross-section of the two shells supported by the stability is semi-circular, but the bottom of the lower shell is flattene...

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Abstract

The invention belongs to the technical field of submarine pipeline facility paving, in particular to a submarine pipeline bending arrestor with a stability support. The submarine pipeline bending arrestor with a stability support is fixed between two segments of a submarine pipeline when in use and comprises a stability support and a spherical bending arrestor fixed inside the stability support, wherein the bending arrestor is axiolitic and has a toroidal cross section, the internal diameter of the bending arrestor is identical to the internal diameter of the pipeline, the external diameter of the cross section axially changes and is gradually reduced from the middle to both ends; the external diameters of the cross sections of both ends of the bending arrestor are identical to the external diameter of the pipeline, the stability support comprises a shell with two petals in identical cross sections, i.e. one semi-toroidal upper shell and one semi-toroidal lower shell with a smoothed bottom and a groove in the bottom middle; the edges of the two petals of the shell are provided with outwards extending eye plates, and bolts penetrate through the eye plates to connect the two petals of shell together and tightly stick the shell to the outer surfaces of the pipeline and the spherical bending arrestor. The invention also provides a fixing method of the bending arrestor. By means ofthe invention, the stress concentration of the submarine pipeline bending arrestor can be effectively prevented and the on-site stability of the submarine pipeline can be enhanced.

Description

technical field [0001] The invention belongs to the technical field of laying submarine pipeline facilities, and in particular relates to an accessory component of a submarine pipeline. Background technique [0002] 1. Buckling Propagation and Buckling Arresters for Submarine Pipelines [0003] Under the action of external hydrostatic pressure and bending, subsea pipelines are prone to buckling failure. There are two forms of buckling failure: one is local buckling (Collapse), and the other is buckling propagation (Propagating Buckles). Theoretically, buckling propagation will not occur if the control pipeline does not locally buckle; however, even if the pipeline is selected and laid strictly according to the design requirements, there will still be some situations in the actual laying process that will cause the pipeline to be affected. The force is greater than expected, causing localized buckling. For example, the submarine pipeline may be subjected to external forces...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L1/20
Inventor 余建星马维林傅明炀李智博杨源杜尊峰卞雪航周清基
Owner TIANJIN UNIV
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