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Double-layer pipe overall buckling simulation experiment device and method

A technology for simulating experimental devices and double-layer pipes, applied in measuring devices, using stable bending force to test material strength, instruments, etc., which can solve problems such as incomplete consistency of pipeline project evaluation criteria

Inactive Publication Date: 2012-08-15
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Restricted by conditions, such pipelines are usually laid directly on the seabed instead of being buried in relatively deep waters. At this time, the complete design check needs the overall buckling analysis, but the existing rules of each classification society do not directly give the The direct analysis method of the overall buckling of double-layer pipelines, the evaluation criteria of various pipeline projects in engineering are not completely consistent, and most of them are based on calculation and verification, so it is necessary to provide a buckling model experimental device for double-layer submarine pipelines

Method used

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  • Double-layer pipe overall buckling simulation experiment device and method
  • Double-layer pipe overall buckling simulation experiment device and method
  • Double-layer pipe overall buckling simulation experiment device and method

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Experimental program
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Embodiment approach 1

[0045] Such as Figure 1 to Figure 2 As shown, the overall buckling simulation experiment device of the double-layer pipe proposed by the embodiment of the present invention includes a base 1 , a double-layer pipe 2 , an axial loading device 3 and two lateral loading devices 4 . The double-layer pipe 2 is arranged on the base 1. The double-layer pipe 2 is composed of an inner pipe 2a and an outer pipe 2b which is sleeved outside the inner pipe 2a at intervals. The ends of the double-layer pipe 2 are fixed. The front ends of the outer tubes 2a and 2b are connected by an inner and outer tube coupling axial loading device 8, and multiple sets of strain gauges 2c are respectively attached to the inner tube 2a and the outer tube 2b for measuring the strain of the inner and outer tubes. An axial loading device 3 is axially slidably connected to the base 1 and connected to the front end of the inner tube 2a, and a pressure sensor 5 is connected between the axial loading device 3 and ...

Embodiment approach 2

[0092] This embodiment is modified on the basis of the experimental device of Embodiment 1, that is, a gasket 7 is added between the inner pipe 2a and the outer pipe 2b, as Figure 12 shown.

[0093] The experimental device of this embodiment can be used to verify the influence of the initial deflection of the washer, and its procedure is the same as that of the first embodiment.

[0094] Through this experimental setup, the influence of the initial deflection of the pipeline on the overall buckling of the pipeline can be studied, and the influence of the gasket spacing and height on the overall buckling of the pipeline can also be studied.

[0095] Other structures, working principles and beneficial effects of this specific embodiment are the same as those of Embodiment 1, and will not be repeated here.

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Abstract

The invention discloses a double-layer pipe overall buckling simulation experiment device and method. The experiment device comprises a base, loading devices, a fixing device, a measuring device and the like. The double-layer pipe consists of an inner pipe and an outer pipe sleeved outside the inner pipe at an interval, and the tail end of the double-layer pipe is fixed by a fixing device; the axial loading device can axially slide and is connected to the base; the axial loading device is connected with the front end of the inner pipe; a pressure sensor is connected between the axial loading device and the inner pipe; two lateral loading devices are located on the two sides of the double-layer pipe respectively; and the two lateral loading devices are staggered.

Description

technical field [0001] The invention relates to a device and method for an integral buckling simulation experiment of a double-layer pipe. Background technique [0002] Double-layer submarine pipelines (pipe-in-pipe systems, also known as double-layer pipes) are generally composed of a conveying inner pipe and a protective outer pipe, and the annular space formed by the inner and outer pipe layers is filled with insulating materials to improve the insulation performance of the pipeline. At present, the most important structural form of high-temperature transportation for offshore oil and gas development is a rigidly connected double-layer submarine pipeline. Restricted by conditions, such pipelines are generally not buried in deep waters but directly laid on the seabed. At this time, the complete design check needs the overall buckling analysis, but the existing rules of each classification society do not directly give the double buckling analysis. The direct analysis metho...

Claims

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Application Information

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IPC IPC(8): G01N3/20G01N3/02
Inventor 段梦兰曾霞光高攀金鑫张玉陈景皓王琴周立军张健董楠谭双妮孙晶晶
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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