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Submerged pipeline air guide sleeve and its production and fixing method

A technology for submarine pipelines and fixing methods, which is applied in the directions of pipeline laying and maintenance, pipes/pipe joints/fittings, mechanical equipment, etc., can solve the problem of high requirements on corrosion resistance of porous layer materials, reduce the possibility and delay the release of vortices. , the effect of enhancing the suppression effect

Inactive Publication Date: 2008-07-16
TIANJIN UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

This method has high requirements on the corrosion resistance of the porous layer material, and is still in the stage of laboratory application.

Method used

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  • Submerged pipeline air guide sleeve and its production and fixing method
  • Submerged pipeline air guide sleeve and its production and fixing method

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Embodiment Construction

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0030] A three-dimensional view of a wind deflector after being assembled and fixed on the pipeline is shown in Figure 1. The wind deflector of the present invention is a central protrusion formed by splicing four tongue-shaped deflectors 7 with the same size and curvature. A symmetrical shell with two top ends 5 connected. After installation, the inner wall of the raised part in the middle is tangent to the pipe 1 with the bottom edge 4 of the butt-connected deflector 7 as the tangent, and is welded on the pipe 1 . The positions where the tops 5 of the four deflectors 7 are connected are also welded together. Each deflector 7 is made of steel plate or other corrosion-resistant plate with certain strength after cutting and bending.

[0031] The shape of each deflector 7 is a curved tongue, similar to an isosceles triangle cut from a cylindri...

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Abstract

The invention relates to an undersea pipeline guide cover which is a symmetrical shell which is connected by two convex tops in the middle. The invention is spliced by four tongue-shaped guide pieces which has the same size and bending radian; each guide piece is gradually thinned from the bottom edge to the top; the bottom edge is provided with a square-wave incision; the external wall of the guide piece is fixed with a Z-shaped torrent wire; the square-wave incision of each guide piece is matched with the square-wave incision of the guide piece which is spliced by the square-wave incision of the guide piece at the bottom edge. The invention also relates to a manufacture and fixing method of the guide cover. The manufacture and fixing method of the undersea pipeline guide cover which is provided by the invention effectively controls a vortex-induced vibration, has moderate complexity of the construction process, keeps the construction cost in an acceptable range, and realizes the optimization between the factors of process complexity, manufacture cost, the restriction effect of the vortex-induced vibration, etc.

Description

technical field [0001] The invention belongs to the technical field of laying submarine pipeline facilities, and in particular relates to a device capable of effectively suppressing vortex-induced vibration of submarine pipelines. Background technique [0002] Submarine pipelines are laid on the rugged seabed. Due to the inhomogeneity of the seabed contour, seabed undercurrents, tides and other factors, in some areas along the pipeline laying path, the pipeline is exposed to form a suspended section. Under the long-term action of environmental loads, the suspended section is easily damaged and fails. Among various failure modes, vortex-induced vibration has the highest probability of occurrence and is the most harmful. Vortex-induced vibration refers to the periodic shedding of the vortex that causes the lateral and flow alternating external forces acting on the object, causing the object to vibrate. The academic community agrees that the lateral vibration is much larger t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L1/20
Inventor 余建星杨怿
Owner TIANJIN UNIV
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