CN103133770B - Varied-Wall-thickness integrated buckle arrestor with side plates - Google Patents
Varied-Wall-thickness integrated buckle arrestor with side plates Download PDFInfo
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- CN103133770B CN103133770B CN201310063968.4A CN201310063968A CN103133770B CN 103133770 B CN103133770 B CN 103133770B CN 201310063968 A CN201310063968 A CN 201310063968A CN 103133770 B CN103133770 B CN 103133770B
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- 238000003466 welding Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
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- 239000000463 material Substances 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
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- 238000010923 batch production Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
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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
The invention belongs to undersea pipe-laying technical field, be specifically related to a kind of buckle arrestor.
Background technique
Easily there is flexing conquassation and destroy in the deep water submarine pipeline of large radius-thickness ratio under external pressure cross section, under extraneous Water Pressure, this destruction will be reduced to certain value until run into obstacle as the valve on pipeline or the residing depth of water of pipeline along pipe transmmision.In the laying and running of deep underwater pipes, may there is buckle propagation phenomenon.
When pipe laying enters water, pipeline, except being subject to air pressure, is more to bear extraneous water pressure.Pipeline pipeline during laying, in unloaded state, does not have internal pressure balance external pressure, and therefore conquassation more easily occurs.So during laying, if pipe laying barge or drill ship were put far apart from the predetermined laying of pipeline or be excessively near, all can cause pipeline to bear excessive localized stress, and this will cause the conquassation of pipeline generation flexing.After pipeline generation localized crush, externally, under the effect of hydraulic pressure, will there is buckle propagation, until run into obstacle or other physical discontinuity.
When pipeline is in run duration, all likely there is flexing conquassation in pipeline while being corroded effect or internal pipe pressure deficiency.In external force, clash into pipeline as boats and ships slip, sea bed active force, under the moment of flexure that seawater causes or other perturbed force effects, also can there is flexing conquassation in pipeline, and under extraneous Water Pressure, flexing is propagated along pipeline axial, finally causes the destruction of whole pipeline.
Solving submarine pipeline buckle propagation problem has the method for an Economy, and that is exactly the length direction buckle arrestor that arranges separated by a distance along pipeline.Its working principle allows pipeline generation cripling exactly, but buckle propagation can not be crossed over buckle arrestor, so just can make cripling only betide between two buckle arrestors.Although buckle arrestor likely causes pipeline generation cripling in one section of degree, kept well the integrity of pipeline, in the middle of Security and Economy, obtained reasonable balance.
Buckle arrestor is on pipeline, to carry out at a certain distance local stiffness reinforcement, and can prevent the device that flexing is propagated along pipeline axial.Effectively buckle arrestor should be able to successfully stop buckle propagation in the design maximum depth of water, its form is generally a thick ring, different according to the mode of installing, generally can be divided into following several: buckle into formula buckle arrestor, common welding type buckle arrestor, integrated buckle arrestor, wrap style buckle arrestor.
Integrated buckle arrestor is a kind of before pipe laying, is welded on the thick ring of pipeline specified location by certain arrangement pitch, and internal radius is identical with internal diameter of the pipeline, and annulus wall ratio pipeline wall thickness is large.Both weld in joint after coaxially sequencing.With integrated buckle arrestor, to take certain measure to prevent that stress is concentrated.The anti-bend of integrated buckle arrestor is respond well, but owing to needing to compare complicated welding in installation process, so its cost is higher than other form buckle arrestor.
Integrated buckle arrestor, according to the difference of length, can be divided into two classes:
1) " length " integrated buckle arrestor: refer to when buckle propagation " passes through " buckle arrestor, the integrated buckle arrestor of cripling all occurs in whole length.According to the buckle propagation pressure calculating, can be by buckle arrestor wall thickness being carried out to the anti-bend effect that appropriate design guarantees buckle arrestor.Ordinary circumstance, the length of " length " integrated buckle arrestor is approximately 4～6 times of pipe diameter.
2) " short " integrated buckle arrestor: refer to when buckle propagation " passes through " buckle arrestor the integrated buckle arrestor that profile remains unchanged substantially.In order to guarantee the anti-bend effect of buckle arrestor, the wall thickness of " short " integrated buckle arrestor is larger than " length " integrated buckle arrestor.
The anti-bend effect of integrated buckle arrestor is relevant with wall thickness and the length of buckle arrestor, and the wall thickness of buckle arrestor is thicker, and length is longer, and the anti-bend performance of buckle arrestor is better; But can increase the weight of buckle arrestor simultaneously, strengthen the difficulty in pipe laying process, and overweight buckle arrestor can increase the local moment of flexure stress of pipeline, may cause the cripling of pipeline.
Summary of the invention
For the problems referred to above, the object of this invention is to provide and a kind ofly can, when guaranteeing anti-bend effect, take into account the Novel integral buckle arrestor of the overall weight of buckle arrestor.Technological scheme of the present invention is as follows:
A kind of integrated buckle arrestor that becomes wall thickness band side plate, comprise buckle arrestor main body, described buckle arrestor main body is fixed on the outside of submarine pipeline, and the 2-4 that the thickness at its two ends is duct thickness doubly, thicker from the wall thickness at buckle arrestor main body two ends, portion's wall thickness attenuation gradually wherein from two ends; Described integrated buckle arrestor also comprises 4 blocks of side plates, and side plate is fixed between the outer wall and inner-walls of duct at buckle arrestor main body middle part, with the dead in line of pipeline, and 90 central angles of being separated by between adjacent side plates.
As preferred implementation, the length of described buckle arrestor main body is 1/2 of whole submarine pipeline length; The length at its middle part is 1/2 of the whole length of buckle arrestor main body.
Integrated buckle arrestor of the present invention designs according to the working principle of integrated buckle arrestor.The groundwork region of integrated buckle arrestor is the two ends with pipeline welding, and in stoping buckle propagation process, the suffered stress in buckle arrestor two ends is larger, is the main region of buckle arrestor generation anti-bend effect; And the suffered stress of buckle arrestor intermediate section is less, for anti-bend, play a secondary role.According to the work characteristics of integrated buckle arrestor, adopt the buckle arrestor that length is longer and suitably reduce the wall thickness of buckle arrestor intermediate section, and at intermediate section, side plate is set, with this, when having guaranteed buckle arrestor anti-bend effect, alleviated the weight of integrated buckle arrestor.Particularly, there is following technique effect:
(1) the present invention adopts integrated buckle arrestor, can be used in submarine pipeline engineering, can effectively prevent submarine pipeline buckle propagation.Compare the buckle arrestor with other form, the integrated buckle arrestor of this kind of form has better anti-bend effect.
(2) weight of the present invention is compared gently with the buckle arrestor of other form.The groundwork region of integrated buckle arrestor is the two ends with pipeline welding, and in stoping buckle propagation process, the suffered stress in buckle arrestor two ends is larger, is the main region of buckle arrestor generation anti-bend effect; And the suffered stress of buckle arrestor intermediate section is less, for anti-bend, play a secondary role.Therefore reduce the wall thickness of integrated buckle arrestor intermediate section, can't significantly affect the anti-bend effect of buckle arrestor, can alleviate the overall weight of buckle arrestor simultaneously; And in pipeline stage casing, side plate is set, with this, strengthens the anti-bend usefulness of buckle arrestor.
(3) the present invention is more conducive to the laying of deep underwater pipes.Although the anti-bend effect of integrated buckle arrestor is better than the buckle arrestor of other form, because the wall thickness of buckle arrestor is thicker, therefore can have a negative impact to the process of deployment of pipeline.While especially adopting J-shaped laying-out tube process, affect especially serious.But integrated buckle arrestor intermediate portion wall thickness of the present invention is thinner, so the flexural rigidity of buckle arrestor integral body is less.Therefore in pipe laying process, can not produce very large flexural stress, be beneficial to the laying operation of pipeline.
(4) structural type of this device is simple, can be by the mould batch production of casting, and simplified manufacturing technique, reduces manufacture cost.
(5) this device mounting process is simple, can install by production line, increases work efficiency, and reduces construction cost.
Accompanying drawing explanation
Fig. 1 be furnished with anti-bend device certain section of submarine pipeline face projection drawing;
Fig. 2 is the sectional drawing of A-A shown in Fig. 1;
Fig. 3 is the sectional drawing of B-B shown in Fig. 1.
Number in the figure explanation:
1 buckle arrestor main body; 2 side plates; 3 submarine pipelines.
Embodiment
As shown in Figures 1 to 3, the structural feature of buckle arrestor of the present invention is as follows:
1) the present invention becomes wall thickness integrated buckle arrestor main body 1 and 4 composite structures that side plate 2 forms by one.All-in-one-piece material should adopt API5L X65 type or the more high-grade grade steel with deep water submarine pipeline 3 identical materials.And side plate should adopt API5L X70 grade steel.This installs main function and is the buckle propagation that prevents that submarine pipeline from occurring in installation or running, guarantees the safety of pipeline integral body.
2) 4-6 that the length of integrated buckle arrestor main body 1 is pipe diameter doubly, the 2-4 that the thickness at integrated buckle arrestor main body 1 two ends is duct thickness doubly, the thickness at buckle arrestor main body 1 middle part is two-end thickness 1/2, and the length at integrated buckle arrestor main body 1 middle part is 1/2 of integrated buckle arrestor main body 1 length.The groundwork region of integrated buckle arrestor is the two ends with pipeline welding, and in stoping buckle propagation process, the suffered stress in buckle arrestor two ends is larger, is the main region of buckle arrestor generation anti-bend effect; And the suffered stress of buckle arrestor intermediate section is less, for anti-bend, play a secondary role.Therefore reduce the wall thickness of integrated buckle arrestor main body intermediate section, can't significantly affect the anti-bend effect of buckle arrestor main body, can alleviate the overall weight of buckle arrestor main body simultaneously.Meanwhile, integrated buckle arrestor body midsection of the present invention divides wall thickness thinner, so the flexural rigidity of buckle arrestor integral body is less.Therefore in pipe laying process, can not produce very large flexural stress, be beneficial to the laying operation of pipeline.
3) thickness of side plate 2 equals the wall thickness of pipeline, waits the middle part that is arranged on buckle arrestor main body of central angle.Side plate is conducive to strengthen the anti-bend performance at buckle arrestor main body middle part.
The method implementation process of this inhibition submarine pipeline buckle propagation is described below in conjunction with accompanying drawing:
While carrying out the making of this anti-bend device, first produce integrated buckle arrestor main body, if there is the pipeline of suitable thickness of pipe wall, can directly utilize this kind of pipeline as buckle arrestor main body; If there is no the pipeline of suitable thickness of pipe wall, can use blank to process, to reach suitable wall thickness.
The wall thickness at process pipeline buckle arrestor main body middle part reduces part.In course of working, can use machined into pipeline middle part wall thickness to reduce part.In course of working, note need to adopting grading profile in the part of buckle arrestor main body wall thickness change, region of variation is pipeline wall thickness 2 times.
According to pipeline middle part wall thickness, reduce the shape of part and wall thickness change part, processing side plate;
The part that side plate is installed for pipeline middle part positions, and every 90 central angles, positions, and notes the dead in line of side plate and pipeline;
According to the location at pipeline middle part, by 4 plate-side plate weldings in the middle part of buckle arrestor main body.
So far the installation process of a set of buckle arrestor completes, during laying, along pipeline axial, every 100-150m, this anti-bend device is set.
Claims (3)
1. an integrated buckle arrestor that becomes wall thickness band side plate, comprise buckle arrestor main body, described buckle arrestor main body is fixed on the outside of submarine pipeline, and the 2-4 that the thickness at its two ends is duct thickness doubly, the wall thickness at buckle arrestor main body two ends is thicker, portion's wall thickness attenuation gradually wherein from two ends; Described integrated buckle arrestor also comprises 4 blocks of side plates, and side plate is fixed between the outer wall and inner-walls of duct at buckle arrestor main body middle part, with the dead in line of pipeline, and the 90 ° of central angles of being separated by between adjacent side plates.
2. the integrated buckle arrestor of change wall thickness band side plate according to claim 1, its feature is, the length of described buckle arrestor main body is 1/2 of whole submarine pipeline length.
3. the integrated buckle arrestor of change wall thickness band side plate according to claim 1, its feature is, the length at described buckle arrestor main body middle part is 1/2 of the whole length of buckle arrestor main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310063968.4A CN103133770B (en) | 2013-02-28 | 2013-02-28 | Varied-Wall-thickness integrated buckle arrestor with side plates |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310063968.4A CN103133770B (en) | 2013-02-28 | 2013-02-28 | Varied-Wall-thickness integrated buckle arrestor with side plates |
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| Publication Number | Publication Date |
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| CN103133770A CN103133770A (en) | 2013-06-05 |
| CN103133770B true CN103133770B (en) | 2014-10-15 |
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| CN201310063968.4A Expired - Fee Related CN103133770B (en) | 2013-02-28 | 2013-02-28 | Varied-Wall-thickness integrated buckle arrestor with side plates |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08302901A (en) * | 1995-04-28 | 1996-11-19 | Nkk Corp | Disk-shaped steel pipe having joint and manufacture thereof |
| JP2003313950A (en) * | 2002-04-22 | 2003-11-06 | Takenaka Komuten Co Ltd | Structure of steel pipe filled with concrete |
| CN201162890Y (en) * | 2007-12-01 | 2008-12-10 | 陈基镛 | High-low pressure integrated type amphimorphic flow aluminium tube |
| CN101968139B (en) * | 2009-11-13 | 2012-02-29 | 天津大学 | Submarine pipeline buckle arrestor with spiral side plates and fixing method thereof |
| CN202371432U (en) * | 2011-11-11 | 2012-08-08 | 常州市武进南夏墅苏南锻造有限公司 | Double-layer seamless steel tube |
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Inventor after: Yu Jianxing Inventor after: Sun Zhenzhou Inventor after: Yu Min Inventor after: Yu Yang Inventor after: Tian Li Inventor after: Yang Yuan Inventor after: Lin Xiaolong Inventor after: Lan Tian Inventor before: Yu Min Inventor before: Yu Jianxing Inventor before: Tian Li Inventor before: Yu Yang Inventor before: Yang Yuan Inventor before: Lin Xiaolong Inventor before: Lan Tian |
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Free format text: CORRECT: INVENTOR; FROM: YU MIN YU JIANXING TIAN LI YU YANG YANG YUAN LIN XIAOLONG LAN TIAN TO: YU JIANXING SUN ZHENZHOU YU MIN YU YANG TIAN LI YANG YUAN LIN XIAOLONG LAN TIAN |
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