CN101968139B

CN101968139B - Submarine pipeline buckle arrester with spiral side plate and fixing method thereof

Info

Publication number: CN101968139B
Application number: CN2009103097436A
Authority: CN
Inventors: 余建星; 周清基; 傅明炀; 杜尊峰; 马维林; 梁静; 晋文超
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2009-11-13
Filing date: 2009-11-13
Publication date: 2012-02-29
Anticipated expiration: 2029-11-13
Also published as: CN101968139A

Abstract

The invention belongs to the technical field of laying submarine pipeline facilities, and relates to a submarine pipeline buckle arrester with a spiral side plate, which is used to protect the submarine pipeline, and includes two shells with the same size and structure, each of which is a variable cross-section Semi-circular, two shells are provided with protruding eye plates, the eye plates are used to connect the two shells through bolts, the outer diameter changes in the axial direction and is connected by a bevel, the two ends are thicker, the middle is thinner, A spiral side plate is fixed on the outer surface of the middle part of the shell, and after the two shells are connected to form an annular cylinder with variable cross-section, the spiral side plates in the middle match each other to form the same spiral structure. The present invention also relates to a fixing method of the buckle arrester. The invention can effectively prevent the subsea pipeline from spreading after buckling, ensure the overall integrity of the subsea pipeline, and avoid greatly reducing the economic loss caused by the structural damage of the subsea pipeline caused by local buckling.

Description

The submarine pipeline buckle arrestor and the fixation method thereof of band spiral side plate

Technical field

The invention belongs to the technical field in the submarine pipeline facility process of deployment, be specifically related to a kind of device that can effectively prevent the propagation of submarine pipeline flexing and suppress the vortex-induced vibration of pipeline.

Background technique

At sea in the process of deployment, the pipeline between pipe laying barge and the seabed exists one section quite long suspended span to submarine pipeline usually, and the length of suspended span is not only relevant with the depth of water, and receives the influence of laying construction load and various complex environments.Can receive some obstacle in the pipe laying process makes pipeline produce excessive bending deflection; After pipe laying is accomplished, because other external force effects such as collision of falling objects such as anchor and sea bed produce cripling equally.This cripling is in case take place, because of the effect that receives outside hydrostatic pressure easily along the vertical bamboo telegraph of pipeline, finally cause the overall structure inefficacy of pipeline, seriously hinder pipeline and move normally.

In addition, undersea pipe-laying is in uneven sea bed surface, and under the acting in conjunction of factors such as ocean current, morning and evening tides, some zone on the laying route of pipeline pipeline takes place easily is exposed on the ocean bottom soil and forms unsettled section.Under the long term of environmental load, unsettled section easily come-up or lateral buckling and vortex-induced vibration takes place and lost efficacy.

Therefore, the buckle propagation of submarine pipeline and vortex-induced vibration bring enormous economic loss to the exploitation of offshore oil and rock gas, prevent that buckle propagation and vortex-induced vibration from having great importance for submarine pipeline engineering.

Usually take to buckle into modes such as cylindrical steel ring or winding around and reach the anti-bend effect at pipeline external surface.But shortcomings such as the ubiquity consumptive material is many, cost is high, construction process complicacy.The method that suppresses vortex-induced vibration through the big volume flow guide device of peripheral hardware has increased construction cost, has improved the laying difficulty of pipeline simultaneously.At present, also do not integrate the device appearance that prevents buckle propagation and inhibition vortex-induced vibration.

Summary of the invention

The objective of the invention is to overcome the deficiency on the existing technology; Provide and effectively to prevent buckle propagation and the device that suppresses vortex-induced vibration; And a kind of making of this device and the method for on submarine pipeline, installing are provided, and take proper construction technology, reduce cost; Effectively the buckle propagation and the vortex-induced vibration of control submarine pipeline are realized the unification of Economy and Security.

The technological scheme that the present invention adopts is following: a kind of submarine pipeline buckle arrestor with the spiral side plate, be used to protect submarine pipeline, and comprise two housings that size is identical with structure; Each housing is respectively the semi-round ring shape of variable cross section, and two housings all are provided with overhanging eye plate, and said eye plate is used for connecting two housings through bolt; External diameter changes vertically and connects through crossing the inclined-plane; Two ends are thicker, and the middle part is thinner, and housing middle part outer surface is fixed with the spiral side plate; After two housings connected into the circular cylinder of a variable cross section, the spiral side plate at middle part coincide each other and forms same helix structure.

As preferred implementation; The internal diameter of described two housings is got the external diameter of said submarine pipeline; Length is got 1.5-2 doubly to said submarine pipeline external diameter; The thickness of two end portions is perhaps got 2.5-3.5 doubly to the wall thickness of said submarine pipeline, perhaps chooses according to the thickness of the outer concrete weighted coating of said submarine pipeline; The thickness at housing middle part is got the doubly wall thickness of the submarine pipeline of protecting of 1-1.5, and the height of spiral side plate is got the height on transition inclined-plane.

The present invention provides a kind of fixation method of above-mentioned submarine pipeline buckle arrestor simultaneously; Comprise the following steps: a housing is close on the pipe surface; According to the identical mode consistent in eye plate position it is docked with another housing, pass eye plate through bolt then two housings are fixed on the pipeline with the sense of rotation of spiral side plate.

The invention provides a kind of submarine pipeline buckle propagation and device that suppresses vortex-induced vibration of preventing; Have the following advantages for existing technology: (1) the present invention can effectively prevent the propagation after the submarine pipeline generation flexing; Guarantee the integrity that submarine pipeline is whole, keep away and reduce greatly that submarine pipeline causes structural damage by cripling and the economic loss that causes.(2) be provided with the spiral side plate at the buckle arrestor intermediate portion; When the come-up flexing took place submarine pipeline, buckle arrestor can apply certain disturbance and change reynolds' number when preventing buckle propagation to incoming flow; Make flowing state get into turbulence state in advance, reach the effect that suppresses vortex-induced vibration.(3) every lobe hull shape of buckle arrestor is identical, can produce in batches through a mould, has simplified manufacturing process, has reduced manufacture cost.(4) do not influencing under the prerequisite that prevents buckle propagation effect and inhibition vortex-induced vibration, the buckle arrestor intermediate portion to lower recess, can be saved rolled steel dosage through chamfered transition like this, reaches economically viable effect.(5) mounting process of buckle arrestor is simple, can install through production line, increases work efficiency, and reduces construction cost.

Description of drawings

Fig. 1 is the front view that is equipped with certain section submarine pipeline of buckle arrestor;

Fig. 2 is a lobe housing of buckle arrestor, is the worm's eye view of buckle arrestor part among Fig. 1;

Fig. 3 another lobe housing for matching with Fig. 2 middle shell is the plan view of buckle arrestor part among Fig. 1;

Fig. 4 is the A-A sectional drawing among Fig. 1;

Fig. 5 is the B-B sectional drawing among Fig. 1;

Fig. 6 is the C-C sectional drawing among Fig. 2.

Label declaration among the figure:

1 buckle arrestor; 2 eye plates; 3 housings; 4 bolts; 5 housing two end portions; 6 housing intermediate portions; 7 concrete layers; 8 submarine pipelines; 9 spiral side plates

Embodiment

Below in conjunction with accompanying drawing, specific embodiments of the invention further describes.

Be equipped with the front view of certain section submarine pipeline of buckle arrestor, as shown in Figure 1.Submarine pipeline buckle arrestor 1 involved in the present invention is to be connected through bolt by two lobe housings 3 closely to be fixed on pipeline 8 surfaces.Every lobe housing 3 shapes are identical, adopt the production line precasting process, selected for use the API 5L X80 of steel grade.

Every lobe housing 3 is the semi-round ring shape of variable cross section.The two end portions 5 of housing 3 is thicker, has overhanging eye plate 2 above, and bolt 4 passes eye plate 2 and connects two lobe housings 3, constitutes buckle arrestor 1; And the intermediate portion 6 of housing is thinner, has spiral side plate 9 above, plays the upset incoming flow, suppresses the effect of pipeline 8 vortex-induced vibrations.As shown in Figure 6, two end portions 5 is connected through the transition inclined-plane with intermediate portion 6.Spiral side plate 9 is fixed on the housing 3 through casting or spot welding, and it highly gets the height on transition inclined-plane, guarantees that the spiral side plate is just in time concordant with two end portions 5.

Fig. 2 and Fig. 3 are the worm's eye view and the plan view of buckle arrestor 1 among Fig. 1, have shown the winding of spiral side plate 9 at buckle arrestor intermediate portion 6, and their shape is identical, is convenient to produce by batch.Fig. 2 passes eye plate 2 with Fig. 3 through bolt and is connected, the buckle arrestor 1 shown in the constitutional diagram 1.Fig. 4 and Fig. 5 are the A-A and the B-B sectional drawing of buckle arrestor 1 among Fig. 1, and they have shown the side structure form of buckle arrestor.

Before pipeline is provided with concrete layer 7, buckle arrestor 1 is installed earlier.Detailed process, is passed eye plate 2 through four bolts then buckle arrestor 1 is fixed on the pipeline 8 through docking with another lobe housing in the position of eye plate 2 and the sense of rotation of spiral side plate for earlier a lobe housing being close on pipeline 8 surfaces.At the pipeline that installs buckle arrestor 8 outer surfaces concrete layer 7 is set.Concrete layer 7 closely connects together with buckle arrestor 1 end, and is as shown in Figure 1.The 1.5-2 of desirable pipeline 8 external diameters of the length of buckle arrestor 1 times, the thickness of two end portions 5 can be with reference to the thickness of concrete layer 7, the wall thickness of also desirable 2.5-3.5 times of pipeline 8, the wall thickness of the desirable 1-1.5 of the thickness of intermediate portion 6 times pipeline 8.

Claims

1. A buckle arrester for submarine pipelines with spiral side plates, used to protect submarine pipelines, is characterized in that it comprises two shells with the same size and structure, each shell is a semi-circular ring with variable cross-section, two The shells are equipped with protruding eye plates, which are used to connect the two shells through bolts. The outer diameter of the shells changes along the axial direction and is connected by a transition slope. The two ends are thicker and the middle is thinner. The outer surface of the middle part is fixed with a spiral side plate, and after the two shells are connected to form an annular cylinder with variable cross-section, the spiral side plates in the middle part match each other to form the same spiral structure.

2. The submarine pipeline buckle arrester according to claim 1, characterized in that, the inner diameters of the two shells are the outer diameter of the submarine pipeline, and the length is 1.5-2 times the outer diameter of the submarine pipeline , the thickness of the two ends is either 2.5-3.5 times the wall thickness of the submarine pipeline, or selected according to the thickness of the concrete counterweight layer outside the submarine pipeline; the thickness of the middle part of the shell is 1-1.5 times the thickness of the protected The wall thickness of the submarine pipeline, the height of the spiral side plate is taken as the height of the transition slope.

3. A method for fixing the buckle arrester of a submarine pipeline according to claim 1, comprising the steps of: attaching a housing to the surface of the pipeline, and placing the shell in such a way that the position of the eye plate coincides with the direction of rotation of the helical side plate It is docked with another shell, and then the two shells are fixed on the pipe by bolts passing through the eye plate.