CN204704477U - Based on the wrap style submarine pipeline bending arrestor of carbon fiber - Google Patents
Based on the wrap style submarine pipeline bending arrestor of carbon fiber Download PDFInfo
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- CN204704477U CN204704477U CN201420648885.1U CN201420648885U CN204704477U CN 204704477 U CN204704477 U CN 204704477U CN 201420648885 U CN201420648885 U CN 201420648885U CN 204704477 U CN204704477 U CN 204704477U
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- pipeline
- carbon fiber
- arrestor
- submarine pipeline
- wrap style
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Abstract
The utility model relates to a kind of wrap style deepwater subsea pipeline flexion stopper based on carbon fiber, it is characterized in that: the wrap style submarine pipeline bending arrestor structure based on carbon fiber is divided into three layers, inner layer ring epoxy layer is underfill resin layer, and as Bond, this layer has sealing function concurrently.Middle level is carbon fibre cloth winding layer, for buckle arrestor plays the main structure of anti-bend effect.Outermost smart wax band is as anticorrosive coat.With the pipe surface of sand papering spraying epoxy powder, simple process is carried out to interface, and be wound around the submarine pipeline wrap style buckle arrestor based on carbon fiber.After brushing bottom epoxy resin primer, carbon fibre cloth is fully flooded through epoxy resin, by 45 °, prepreg is wound on pipeline.After carbon fibre cloth has been wound around, carry out hot setting, and be wound around smart wax and take up antisepsis.This invention can realize the anticorrosion corrosion protection of submarine pipeline, reduces stress and concentrates, strengthen bending resistance, antidetonation, antifatigue, sealability, improves to lay and installs and anti-bend efficiency, cost-saving.
Description
Technical field
The utility model relates to a kind of buckle arrestor specifically about a kind of wrap style submarine pipeline bending arrestor based on carbon fiber.
Background technique
Oil and gas is as the national strategy energy, and between decades, demand constantly increases in the past, and for adapting to energy demand, petroleum production also progressively develops to ocean from land.Submarine pipeline is the important component part during the defeated and accumulating of marine oil and gas collection is produced.Deep-water subsea pipeline is once after building up, and hardly by the restriction such as landform, sea situation, because of it, to have transport volume large, conveying efficiency advantages of higher and fast development.But meanwhile, move towards in the process at deep-sea from coastal waters, submarine pipeline subjected to the huge challenge that special ocean environment brings.Deep-water subsea pipeline is often laid on to be had on the sea bed of certain depth apart from sea level, and pipeline bears huge sea water static pressure; Cast anchor and be equivalent to single force effect, make submarine pipeline produce geometry deformation; Pipeline affects by wave, ocean current etc. and easily produces excessive moment of flexure.In addition, ocean environment and fed sheet of a media may form corrosion to pipeline.Abyssalbenthic complex environment makes submarine pipeline generation cripling be difficult to avoid.Cause the reason of deep-water subsea pipeline except special ocean condition, also comprise out of roundness and the radius-thickness ratio of pipeline itself.These reasons can bring out buckle propagation, and deepwater environment residing for deep-water subsea pipeline, bear sea water static pressure, easily cause the Propagation of flexing.
Flexing is a kind of form of loss of structure bearing capacity, refers to the ability of the original state of equilibrium of loss of structure maintenance.After cripling unstability occurs, destroy pipeline configuration, and then make pipeline integrity impaired.Flexing initial pressure is P
i, buckle propagation pressure is P
p, when maximum external pressure is lower than flexing initial pressure P
itime, only bend flexing, and maximum external pressure is greater than buckle propagation pressure is P
ptime, then bending propagation can last till that external pressure is less than or equal to P
p.When maximum external pressure is greater than flexing initial pressure P
itime, cripling and flexural buckling then can Propagations, until external pressure is less than or equal to P
p.Generally, buckle propagation pressure P
pbe less than flexing initial pressure P
i, therefore only need to be greater than buckle propagation pressure P
ppressure will cause buckle propagation.Submarine pipeline flexing is once propagate, and velocity of propagation can reach hundreds of rice per second, and lose huge, rehabilitation cost is high.Therefore need to take certain method to prevent or limit flexion propagation.
In theory, increase pipeline wall thickness and can suppress buckle propagation.But design pipeline with buckle propagation pressure, by making, the wall thickness of pipeline is blocked up, economically and infeasible.The effective method that another kind of limit flexion is propagated arranges buckle arrestor at submarine pipeline certain intervals.Buckle arrestor can occur over just between adjacent buckle arrestor by restriction conduit buckle propagation.The distance of buckle arrestor is determined by the feature of disparity items, and in general distance 90-180m is more reasonable.Buckle arrestor limit flexion is propagated, keep the characteristic of pipeline integrity, makes undersea pipe-laying reach balance between Economy and Security, has good future in engineering applications.
The citation form of buckle arrestor is a thick ring, and buckle arrestor conventional is at present different according to installation form, is divided into the formula of buckling into, welding type, wrap style and integrated buckle arrestor.The formula buckle arrestor of buckling into is a thick ring, is first screwed into pipeline specified position and is then clamped, its internal radius than outer diameter tube little over being full of; Weld with pipeline junction buckling into formula buckle arrestor, form welding type buckle arrestor; Wrap style buckle arrestor formula is wound around at specified position reinforcing bar, and two ends are connected with pipeline welding; Integrated buckle arrestor internal diameter is identical with internal diameter of the pipeline, and wall ratio pipeline is thicker, and both weld in joint after coaxially sequencing, and form an entirety.
Buckle into formula, wrap style, welding type buckle arrestor structure simply, easily manufactured, but anti-bend efficiency is relatively low.Although integrated buckle arrestor anti-bend effect is best, higher to welding process requirement, install complicated, and quality is large.How can reach in conjunction with the advantage of different buckle arrestor the engineer applied object that connection is simple, anti-bend efficiency is high is problem demanding prompt solution.The present invention is to address this problem as target, the feature of, easy construction simple in conjunction with wrap style buckle arrestor structure and carbon fibre cloth intensity is high, quality is light, corrosion resistant feature, abandoning tradition wrap style buckle arrestor utilizes reinforcing bar to carry out winding need to carry out welding and the inefficient drawback of anti-bend, produce the submarine pipeline wrap style buckle arrestor based on carbon fiber.
Carbon fiber is a kind of fibre-forming polymer, carbon content more than 90%, is formed in temperature more than thousand degree carbonizations by cellosilk.Carbon fiber density is little, quality is light, and its density is only 25% of steel density, 50% of aluminum alloy density; Secondly, carbon fiber strength is high, is probably 5-6 times of steel; In addition, the premium properties such as carbon fiber also has that Young's modulus is large, endurance, corrosion-resistant, creep resistant, have extensive use in numerous technical field.Along with industrial gas oil carries out increasing of reinforcing research to carbon fiber, the deep-water subsea pipeline wrap style buckle arrestor based on carbon fiber arises at the historic moment.
Submarine pipeline wrap style buckle arrestor based on carbon fiber is made up of carbon fibre cloth and auxiliary resin.Carbon fibre cloth is the cloth-like carbon fiber product without resin-dipping.Auxiliary resin is epoxy resin, can be divided into underfill resin layer and insulating varnish.Underfill resin layer can infiltrate through steel pipe, strengthening surface, improves steel pipe adhesive property simultaneously, and can be used as Bond and use, its thickness is about 0.2mm-0.35mm (being no more than 0.4mm); Insulating varnish infiltrates carbon fibre cloth, guarantees that fibre cloth becomes as a whole with steel pipe, jointly stressed.Carbon fibre cloth has excellent mechanical property, anticorrosive, wear-resisting, good stability, resistance to oxidation, for applications well laying a good foundation in submarine pipeline bend-preventing.Meanwhile, auxiliary resin epoxy resin also has excellent Chemical Physics performance, and cohesive force is strong, corrosion-resistant, cure shrinkage is little, intensity is high, good endurance, applicability are strong.Performance based on the submarine pipeline wrap style buckle arrestor of carbon fiber is not only relevant with auxiliary resin and carbon fibre material, and the interface between auxiliary resin and Bond also plays an important role.Bonding surface emery wheel or sand papering process can make underfill resin layer cohesiveencess improve, and increase the endurance quality of buckle arrestor.
The enhancing mechanism of carbon fiber anti-bend effect: make carbon fibre cloth and pipeline form an entirety as Bond by underfill resin layer, reduces pipe wall strain and stress is concentrated, and improves pipeline bearing capacity.Owing to wanting high when the unit cross-sectional area carbon fiber load ratio of bearing normally works before pipeline surrender, thus carbon fiber is made to play humidification.In sum, submarine pipeline wrap style buckle arrestor working principle based on carbon fiber is: the submarine pipeline wrap style buckle arrestor based on carbon fiber works in coordination with internal pipeline acting in conjunction, opposing External force interference, until this structural system has the first flexing of a side, thus improving ultimate bearing capacity and the working life of pipeline, limit flexion is propagated.
Carbon fibre cloth is wrapped in outside submarine pipeline, is fixed as Bond by epoxy resin, simple efficient connection can be realized.Pipeline is forced through glue-line and is delivered on carbon fibre cloth, makes it simultaneously stressed with pipeline, can improve pipeline flexing bearing capacity, reduce crack growth rate, prevent buckle propagation.Meanwhile, carbon fibre cloth Corrosion Protection is good, and pipeline can be prevented by sea water intrusion, increases pipeline life.
Summary of the invention
For the problems referred to above, the object of this invention is to provide one and both connected simply, prevent seawater corrosion, there is again the deep-water subsea pipeline wrap style buckle arrestor based on carbon fiber of higher anti-bend ability.
For achieving the above object, the present invention takes following technological scheme: based on the submarine pipeline wrap style buckle arrestor of carbon fiber, it is characterized in that:
Wrap style submarine pipeline bending arrestor structure based on carbon fiber is divided into three layers, and inner layer ring epoxy layer is underfill resin layer, and as Bond, this layer has sealing function concurrently.Middle level is carbon fibre cloth winding layer, and thickness is 0.2mm-0.35mm, for buckle arrestor plays the main structure of anti-bend effect; Outermost smart wax band is as anticorrosive coat.
Because pipeline itself has 3PE anticorrosive coat, after simply polishing to anticorrosive coat interface, brushing bottom epoxy resin primer, is then wound around carbon fibre cloth.In winding process, first carbon fibre cloth is fully flooded through epoxy resin, by 45 °, carbon fibre cloth is wound on pipeline.Through overcuring and preservative treatment, complete the installation of the whole submarine pipeline wrap style buckle arrestor based on carbon fiber.This invention is simple in conjunction with wrap style buckle arrestor structure, the feature of easy construction and carbon fibre cloth intensity is high, quality is light, corrosion resistant feature, abandoning tradition wrap style buckle arrestor utilizes reinforcing bar winding pipeline to weld and the inefficient drawback of anti-bend, produces the submarine pipeline wrap style buckle arrestor based on carbon fiber.This is the part of this patent core the most.
The present invention combines the advantage of wrap style buckle arrestor and carbon fibre material, has the following advantages:
1, antidetonation, anti-fatigue performance are good.Submarine pipeline wrap style buckle arrestor based on carbon fiber makes pipeline be subject to three-dimensional stress state, effectively can control crack growth, improves Pipeline Fatigue Life.Meanwhile, the flexing bearing capacity of pipeline can be improved, reduce submarine earthquake to the impact of pipeline.
2, anti-bend efficiency is strengthened.Carbon fibre cloth has excellent mechanical property, anticorrosive, wear-resisting, good stability.Based in the submarine pipeline wrap style buckle arrestor of carbon fiber, fiber is bonded into an entirety, anchoring fiber position, uniformly distributed load by the underfill resin layer as continuous phase, by the interface of underfill resin layer and fiber, transfers loads on fiber.When therefore occurring to destroy, carbon fiber can absorb more multi-energy, has more powerful and stable anti-bend character, strengthens anti-bend efficiency.
3, reduce stress to concentrate.In conventional subsea pipeline buckle arrestor, Placement is mostly welding, and so, weld seam bears larger stress, produces stress and concentrates, and higher to welding requirements, once weld seam destroys, consequence is hardly imaginable.Carbon fiber stress concentrates on fiber end, and carbon fibre cloth inside does not exist fiber end substantially, largely avoided stress concentration phenomenon.
4, corrosion resistance is strong.Carbon fiber Corrosion Protection is good, and carbon fibre cloth is wrapped in outside pipeline and special ocean environment can be prevented the corrosion of pipeline.
5, difficulty of construction is reduced.The laying of submarine pipeline generally adopts pipe laying barge laying method, and it is high that the method has stability, the good and operating efficiency advantages of higher of flexibility.No matter be traditional " S type ", " J type " or pipe crimping type laying-out tube process, pipeline weight seriously restricts pipe laying efficiency.And the laying of deep-water subsea pipeline not only needs to consider laying speed, the problems such as the large and poor stability of the tension force that brings because weight is excessive more should be considered.Submarine pipeline wrap style buckle arrestor quality based on carbon fiber is light, greatly reduces pipe laying barge and bears weight, reduces difficulty of construction, improves and lays efficiency.
6, cost is low, and manufacturing process is simple.Submarine pipeline wrap style buckle arrestor based on carbon fiber only has epoxy resin and carbon fiber two kinds of components, and manufacturing process is very simple, and cost is lower.
Accompanying drawing explanation
Fig. 1 is the general perspective view that the present invention is used in certain section of submarine pipeline
Fig. 2 is the A-A schematic cross-section shown in Fig. 1
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
As shown in Figure 1 and Figure 2,1 is submarine pipeline wall thickness, and the surface of 1 is submarine pipeline anticorrosive coat, and 2 is the submarine pipeline wrap style buckle arrestor epoxy resin of binder layer based on carbon fiber, and 3 is the submarine pipeline wrap style buckle arrestor body based on carbon fiber, and 4 is smart wax band.
Fabrication and installation method of the present invention comprises the following steps:
(1) pipe surface process
With the pipe surface of sand papering spraying epoxy powder, in figure 1, make it have small hoop cut, to strengthen the adhesive strength of pipeline and carbon fibre cloth winding material.
(2) brushing bottom epoxy resin primer
First, epoxy resin is mixed with 100: 30 with curing agent, as underfill resin layer and Bond, evenly brush 0.2mm-0.35mm (being no more than 0.4mm) at pipeline external surface.
(3) carbon fibre cloth is wound around
First carbon fibre cloth is fully flooded through epoxy resin, be wound on pipeline by 45 °.Lay with roller bearing pressing in winding process, unnecessary bubble can be extruded.General buckle arrestor length is 0.5-2.0 pipe diameter doubly, and arrangement pitch is 90-180m.
(4) solidify
High temperature contributes to carbon fibre cloth solidification, and in addition, radiation also can accelerate solidification process.
(5) anti-corrosion protection
Smart wax band is wound around at fibre cloth skin.
Claims (1)
1. based on a wrap style submarine pipeline bending arrestor for carbon fiber, it is characterized in that: the wrap style submarine pipeline bending arrestor structure based on carbon fiber is divided into three layers, and inner layer ring epoxy layer is underfill resin layer, and as Bond, this layer has sealing function concurrently; Middle level is carbon fibre cloth winding layer, and thickness is 0.2mm-0.35mm, for buckle arrestor plays the main structure of anti-bend effect; Outermost smart wax band is as anticorrosive coat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420648885.1U CN204704477U (en) | 2014-11-03 | 2014-11-03 | Based on the wrap style submarine pipeline bending arrestor of carbon fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420648885.1U CN204704477U (en) | 2014-11-03 | 2014-11-03 | Based on the wrap style submarine pipeline bending arrestor of carbon fiber |
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|---|---|
| CN204704477U true CN204704477U (en) | 2015-10-14 |
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|---|---|---|---|
| CN201420648885.1U Expired - Fee Related CN204704477U (en) | 2014-11-03 | 2014-11-03 | Based on the wrap style submarine pipeline bending arrestor of carbon fiber |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105370985A (en) * | 2014-11-03 | 2016-03-02 | 中国石油大学(北京) | Winding type submarine pipeline buckle arrester based on carbon fibers |
| CN105715909A (en) * | 2016-01-21 | 2016-06-29 | 中国石油大学(北京) | Reinforcing ring for pipeline penetrating through active fault area based on nanometer nickel-iron alloy foil |
-
2014
- 2014-11-03 CN CN201420648885.1U patent/CN204704477U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105370985A (en) * | 2014-11-03 | 2016-03-02 | 中国石油大学(北京) | Winding type submarine pipeline buckle arrester based on carbon fibers |
| CN105715909A (en) * | 2016-01-21 | 2016-06-29 | 中国石油大学(北京) | Reinforcing ring for pipeline penetrating through active fault area based on nanometer nickel-iron alloy foil |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151014 Termination date: 20161103 |
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| CF01 | Termination of patent right due to non-payment of annual fee |