CN107687558B - Combined buckle arrestor for submarine fiber reinforced composite flexible pipe - Google Patents
Combined buckle arrestor for submarine fiber reinforced composite flexible pipe Download PDFInfo
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- CN107687558B CN107687558B CN201710785241.5A CN201710785241A CN107687558B CN 107687558 B CN107687558 B CN 107687558B CN 201710785241 A CN201710785241 A CN 201710785241A CN 107687558 B CN107687558 B CN 107687558B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/02—Protection of pipes or objects of similar shape against external or internal damage or wear against cracking or buckling
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Abstract
The invention discloses a combined buckle arrestor for a fiber reinforced composite flexible pipe, which comprises a metal outer sleeve ring and a fiber reinforced inner sleeve ring, wherein the metal outer sleeve ring comprises a main sleeve ring, a locking sleeve ring and an elastic sealing gasket; the fiber reinforced inner lantern ring comprises a fiber reinforced layer and a matrix protective layer; the fiber reinforced inner lantern ring is positioned at the outer side of the composite pipe and is in hot melt bonding with the composite pipe, which is equivalent to locally thickening the pipe to realize the improvement of the buckling resistance; the metal outer collar wraps the outer side of the fiber-reinforced inner collar through interference fit, can assist the fiber-reinforced inner collar to realize the buckle preventing function, and can prevent the composite pipe from being bent too much by means of the better deformation resistance of the metal outer collar so as to reduce the stress concentration of the fiber-reinforced inner collar. The invention reasonably utilizes the bonding characteristic of the composite pipe material to realize the processing of the fiber reinforced inner lantern ring, and adds the local structural strength by the metal outer lantern ring, has the advantages of both the steel pipe welding type and the buckling and pressing type buckle arrestor, and has wide popularization and practical value.
Description
Technical Field
The invention relates to the technical field of auxiliary components of marine fiber reinforced composite flexible pipes, in particular to a combined buckle arrestor for deep-sea high-pressure fiber reinforced composite flexible pipes, which is applied to oil or water transportation.
Background
The marine oil and gas industry is facing deeper waters, more hostile transportation environments, more complex installation conditions and wider application fields, and the material properties of traditional marine steel pipes are showing more and more insufficiencies, including their corrosion resistance, weight, flexibility and other aspects hindering further application and development. In order to overcome the defects, a plurality of novel marine pipelines made of plastic materials appear in succession, the most widely used is a thermoplastic fiber reinforced bonding composite pipe (RTP) made of a thermoplastic material coated with a plastic fiber tape and wound, and a fiber reinforced layer and inner and outer plastic matrix protective layers are bonded into a whole through hot melting in the production process of the RTP pipe, so that the RTP pipe has the advantages of high internal pressure resistance, light weight, strong corrosion resistance, fatigue resistance and the like.
Whether the fiber reinforced composite flexible pipe or the steel pipeline pipe is used, during the service period of the pipe, the local buckling and crushing of the pipeline are caused by the weakening of the local buckling resistance of the pipeline caused by the local pit defect caused by the collision of other objects, the local buckling caused by the excessive bending in the installation process or overload service and the reduction of the local wall thickness caused by abrasion corrosion. As the buckling transmission pressure is smaller than the local buckling pressure, once the local buckling crushing occurs, the buckling can be transmitted at high speed along the length direction of the pipeline, and finally the whole pipeline can be destroyed, thereby causing huge economic and ecological hazards. The buckling problem is solved mainly by designing and installing a buckle arrestor at present, the existing buckle arrestor is mainly configured for a steel pipe, and the buckle arrestor designed for a composite pipe is rare.
The steel pipe buckle arrestor is mainly divided into a welding buckle arrestor, an additional buckle arrestor, a winding buckle arrestor and an inner ring buckle arrestor according to different connection modes. The welded buckle arrestor is connected with pipelines at two ends of the welded buckle arrestor into a whole through fine welding, has good buckle arrestor effect, is suitable for submarine steel pipes with medium water depth and large water depth, has the defects of easy generation of welding defects and stress concentration, has high process requirements during welding, and needs to adopt a certain mode to overcome the stress concentration; the additional buckle arrestor is fixed on the outer side of the pipeline in an interference fit manner, the buckle arrestor is prevented from sliding by using friction force, welding is not needed, the installation is convenient, the cost is low, the circumferential rigidity of the pipeline can be increased, but the buckle arrestor has low efficiency, and the pipeline can possibly have a U-shaped crossing phenomenon; the winding type buckle arrestor is formed by uniformly and tightly winding a plurality of circles of reinforcing bars on the surface of a steel pipe according to a certain angle to replace a thick-wall ring sleeve of a buckling type buckle arrestor, the annular rigidity of a pipeline can also be improved, two ends of the reinforcing bars are welded with the pipeline together to fix the position of the buckle arrestor on the pipeline and prevent sliding, the winding type buckle arrestor has the advantages of simple structure, low installation cost, smaller bending rigidity, no bending stress concentration point generally generated, and the defects of low buckle arresting efficiency and smaller strength than other buckle arrestors; the inner ring type buckle arrestor is also a circular ring sleeve and is mainly used for a pipe-in-pipe.
From the view of a use environment, the application condition of the fiber reinforced composite flexible pipe is more complex, the fiber reinforced composite flexible pipe is required to bear larger bending and longer pipe span suspension distance, particularly in submarine laying, a complex terrain generates great test on the composite pipe with weaker transverse performance, the fiber reinforced composite flexible pipe is likely to buckle in the whole service life, and the buckling can cause the fiber failure, matrix cracking, plastic yield or delamination and other consequences of the composite pipe; at present, for a composite pipe with a small caliber and low application condition, the wall thickness of the pipeline, particularly the thickness of the reinforcing layer, is properly increased, so that the buckling of the pipeline can be restrained to a certain extent, but for a large-caliber pipeline, a complex application condition and external high pressure in deep sea, the buckling is prevented, so that the phenomenon that the pipe wall is greatly thickened does not meet the economic requirement, in conclusion, the arrangement of the buckle arrestor for the composite pipe becomes a more reasonable solution, and an appropriate buckle arrestor form needs to be selected.
For steel pipes, the performance in different directions is not very different. Different from steel pipelines, the fiber reinforced composite flexible pipe has larger difference in material performance and structural characteristics from a steel pipe, and particularly, the annular performance and the radial performance of the composite pipe are greatly different from the axial performance of the composite pipe, so that the steel pipe buckle arrestor cannot be directly used on the fiber reinforced composite flexible pipe. Considering from different buckle arrestors, the welded buckle arrestor with good buckle arrestor effect for the steel pipe cannot be directly welded with the composite pipe; the additional buckle arrestor must ensure interference connection with the pipe body, otherwise the buckle arrestor has low buckle arrestor efficiency, the large bending of the composite pipe easily causes stress concentration at the edge of the additional buckle arrestor, and the radial performance of the composite pipe is weaker, so that the large deformation, crushing and cracking of the pipe body are easily formed; the reinforcing bar of the winding buckle arrestor can not be welded with the pipe body and can not be matched with the composite pipe to form an effective whole. Therefore, it is desirable to provide an anti-buckling device for a composite pipe to overcome the drawbacks of the prior art.
Disclosure of Invention
The invention aims to solve the technical problem that no buckle arrestor suitable for a composite pipe exists in the prior art, and if the buckle arrestor for a steel pipe is adopted, the defects of low buckle arrestor efficiency, poor structural reliability and the like exist, and the combined buckle arrestor for the submarine fiber reinforced composite flexible pipe is provided, so that the buckle arrestor is improved in buckle arrestor efficiency, and meanwhile, the composite pipe body is not damaged or failed.
The invention is realized by adopting the following technical scheme: a combined buckle arrestor for a submarine fiber reinforced composite flexible pipe comprises an outer protective layer, a reinforcing layer and an inner liner layer in sequence from outside to inside, and comprises a fiber reinforced inner lantern ring and a metal outer lantern ring, wherein the fiber reinforced inner lantern ring is arranged on the outer side of the reinforcing layer of the composite flexible pipe and is in hot-melt bonding with the reinforcing layer of the composite flexible pipe; the metal outer collar is arranged on the outer side of the fiber reinforced inner collar and is in interference fit with the fiber reinforced inner collar.
Furthermore, the metal outer sleeve ring comprises a main sleeve ring and a locking sleeve ring, the main sleeve ring is a cylindrical sleeve, a convex ring is arranged on the inner wall of one end of the main sleeve ring, and an internal thread is processed on the inner wall of the other end of the main sleeve ring; the locking lantern ring sets up between the main lantern ring that has the internal thread one end and the compound flexible pipe, and with main lantern ring threaded connection, has the external screw thread that matches with the internal thread of main lantern ring promptly in the surface processing of locking lantern ring.
Furthermore, the fiber reinforced inner lantern ring is manufactured on the outer surface of the composite flexible pipe reinforcing layer through a hot melting winding technology and is bonded with the outer surface of the composite flexible pipe reinforcing layer, the fiber reinforced inner lantern ring comprises a fiber reinforcing layer and a matrix protective layer, the fiber reinforcing layer is similar to the composite flexible pipe reinforcing layer and is a sleeve structure formed by winding the fiber tapes in a staggered mode after the fiber tapes are pre-soaked with hot melting matrix liquid, the types, winding angles, layer densities and the like of the fiber tapes are not limited, the matrix material of the matrix protective layer is the same as the matrix material of the outer protective layer of the composite flexible pipe, and the fiber; the fiber reinforced layer covers and is adhered to the outer side of the composite flexible pipe reinforced layer, the matrix protective layer covers and is adhered to the outer side of the fiber reinforced layer and is adhered to the outer protective layer of the composite flexible pipe, and all adjacent layers are subjected to hot melting adhesion without gaps, so that the fiber reinforced inner lantern ring and the composite flexible pipe are fused into a whole.
Further, lantern ring both ends are passed through transition conical surface respectively to compound flexible pipe in the fibre reinforcing, and protruding ring and the locking lantern ring even with transition conical surface phase-match, for example the cross-section of protruding ring and the locking lantern ring can be right trapezoid to cooperate with transition conical surface slope, be about to the locking lantern ring after screwing in between main lantern ring and the compound flexible pipe, the front end inclined plane of the locking lantern ring, the rear end inclined plane and the oblique conical surface cooperation of transition of protruding ring, press from both sides the lantern ring in the fibre reinforcing tightly, lock in the centre.
Furthermore, the thickness of the fiber reinforced layer is not less than that of the composite flexible pipe reinforced layer, the thickness of the base protective layer is not less than that of the outer protective layer of the composite flexible pipe, the base material is consistent with that of the fiber reinforced layer, the length of the base protective layer is consistent with that of the fiber reinforced layer, and the base protective layer is bonded with the fiber reinforced layer to form a complete sleeve.
Further, still be provided with elastic sealing washer on protruding ring inner wall and the locking lantern ring inner wall, elastic sealing washer adopts high density rubber ring, with protruding ring and the bonding connection of locking lantern ring, and elastic sealing washer's thickness will be greater than the clearance thickness between the protruding ring of main lantern ring and the locking lantern ring and the compound flexible pipeline, consequently after metal outer collar is installed well, elastic sealing washer is extruded and takes place interference deformation, can form good sealed effect.
Furthermore, the inner diameter of the main lantern ring is slightly smaller than the outer diameter of the fiber reinforced inner lantern ring, and the inner diameter of the bulge ring is larger than the outer diameter of the composite flexible pipe.
Further, the length of the main collar is greater than the length of the fiber reinforced inner collar.
Furthermore, the main lantern ring is composed of two symmetrical saddle plates with semicircular sections, one side of each saddle plate is hinged, the other side of each saddle plate is connected through a bolt, the fiber reinforced inner lantern ring can be directly and externally fastened and compressed, internal threads on the saddle plates are communicated, and the connected main lantern ring is provided with a complete threaded passage.
Furthermore, the locking lantern ring is formed by splicing two semicircular rings, the outer surfaces of the two semicircular rings are provided with intercommunicating external threads, and the outer wall of the spliced locking lantern ring is provided with a complete thread passage and can be screwed into the main lantern ring along the external threads of the main lantern ring.
Compared with the prior art, the invention has the advantages and positive effects that:
the invention provides a combined buckle arrestor for a composite flexible pipe, which comprises a fiber reinforced inner sleeve ring and a metal outer sleeve ring:
firstly, arranging a fiber reinforced inner lantern ring outside a pipe body stripped of an outer protective layer, wherein the fiber reinforced inner lantern ring and the pipe body are bonded into a whole through hot melting, a winding fiber reinforced layer similar to a reinforced layer structure is used for improving the local circumferential rigidity of the pipeline, and the fiber reinforced inner lantern ring can be regarded as local thickening of a composite flexible pipe layer after being bonded with the pipeline reinforced layer, so that the consistency of the performance of the structural section of a buckle arrestor pipe section and other pipe sections is ensured, the buckling resistance of the pipeline is effectively improved, and other performances (tensile property, internal pressure resistance and the like) of the pipeline are not weakened at the same time, and the pipe is equivalent to a welded; from the aspect of local design, the fiber type, the density, the winding angle and the like of the fiber reinforced layer can be adjusted according to the actual requirements of the pipeline to enhance the buckling resistance, and the flexibility is high; the conical surface transition of the two ends of the fiber reinforced layer smoothes the stress distribution, and prevents the stress concentration of the transition section; the matrix protective layer effectively protects the fiber-reinforced layer from abrasion and corrosion of its structure.
The metal outer collar coated on the outer side of the fiber reinforced inner collar also has the buckling-stopping effect, the interference fit with the fiber reinforced inner collar is formed through buckling, the hoop rigidity of the buckle arrestor is further increased, the bending of the pipeline at the buckle arrestor section is overcome through the rigidity of a metal member so as to reduce local bending stress, meanwhile, the fiber reinforced inner collar which is easy to cause excessive wear and damage due to local protrusion in laying is also protected, a good auxiliary effect is achieved, and the buckling-pressing buckle arrestor is similar to a steel pipe.
From the view of local design, firstly, the arrangement of the elastic sealing washer overcomes the problem that the fiber reinforced inner lantern ring is easily worn at the non-interference section of the metal outer lantern ring, and the elastic sealing washer also has the sealing function, so that the structure and the performance of the fiber reinforced inner lantern ring are prevented from being changed after the inner interference section is corroded; secondly, the arrangement of the left and right transition conical surfaces is also reasonable, on one hand, the conical surfaces at the two ends of the fiber reinforced layer are matched for transition, on the other hand, the metal outer sleeve ring is axially fixed through the interference fit of the conical surfaces, and the excessive interference pressure is not required to be formed on the outer surface of the fiber reinforced outer sleeve ring for utilizing friction for limiting, so that the design considers the defect of the radial performance of the composite flexible pipe, and the excessive radial deformation of the pipeline of the buckle arrestor section is avoided; thirdly, even if the interference pressure of the metal outer sleeve ring on the fiber reinforced inner sleeve ring is too large due to uncontrollable factors, the buckling pressure of the metal sleeve ring only acts on the inner sleeve ring, and the local rigidity enhancement at the position can effectively reduce the radial deformation of the pipeline; fourthly, the halving structure of the metal outer collar and the locking collar facilitates the installation and the disassembly of the buckle arrestor, and the design of the locking collar facilitates the adjustment of the matching degree between the metal outer collar and the fiber reinforced inner collar.
In summary, the present invention combines a fiber reinforced inner collar and a metal outer collar, similar to the combination of a steel tube welded buckle arrestor and a press buckle arrestor. After the factors such as the actual structure and material characteristics of the composite flexible pipe, application conditions and the like are fully considered, the defects of each buckle arrestor are analyzed and the advantages of the buckle arrestor are reasonably utilized, a novel combined buckle arrestor is designed, and the buckle arrestor efficiency of the composite flexible pipe is greatly increased.
Drawings
Fig. 1 is a schematic view of the overall structure of the combined buckle arrestor according to the embodiment of the invention;
fig. 2 is an exploded view of the combined buckle arrestor according to the embodiment of the present invention;
fig. 3 is a cross-sectional view of the combined buckle arrestor according to the embodiment of the invention.
Detailed Description
In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
The embodiment discloses a combined type buckle arrestor for a seabed fiber reinforced composite flexible pipe, for convenience of description, the combined type buckle arrestor for the seabed fiber reinforced composite flexible pipe is simply referred to as a composite pipe below, referring to fig. 2 and 3, the composite pipe 1 sequentially comprises an outer protective layer 11, a reinforcing layer 12 and an inner liner layer 13 from outside to inside, the combined type buckle arrestor comprises a fiber reinforced inner lantern ring 2 and a metal outer lantern ring 3, and as shown in fig. 3, the fiber reinforced inner lantern ring 2 comprises a fiber reinforcing layer 21 and a matrix protective layer 22, the structure and the manufacturing method of the fiber reinforcing layer 21 are similar to those of the reinforcing layer 12 of the composite pipe 1, and the fiber reinforced layer 21 is made of a fiber belt pre-impregnated with a. The fiber reinforced layer 21 is covered on the surface of the reinforced layer 12, which is equivalent to thickening the reinforced layer 12, after comprehensively considering the circumferential stiffness enhancing effect, radial deformation performance, pipeline load and other factors of the fiber reinforced inner jacket layer, the thickness is set to be 100% to 120% of the reinforced layer, the laying density (mass ratio) of the fiber tape and the winding angle of the fiber tape can be different from that of the reinforced layer 12, and the requirements on bending prevention under pipe bodies with different application conditions and environmental conditions are specifically determined. The base protective layer 22 is a protective layer covering and bonded to the outer surface of the fiber reinforced layer 21, is similar to the outer protective layer 11 of the composite pipe 1, is made of the same base material, has the thickness of 100-120% of the thickness of the outer protective layer 11, and has the effects of water resistance, corrosion resistance and abrasion resistance.
Correspondingly, the two ends of the fiber reinforced layer 21 are transition conical surfaces 23 from thick to thin, the conical angle is not more than 45 degrees, the conical surfaces are kept smooth as much as possible during processing, and simultaneously the base protective layer 22 is uniformly covered on the conical surfaces. The fiber reinforced layer 21, the substrate protective layer 22, the reinforcing layer 12, the substrate protective layer 22 and the outer protective layer 11 are all bonded by hot melting of the same material substrate without gaps, so that the fiber reinforced inner lantern ring 2 and the composite pipe 1 are fused into a whole.
The metal outer collar 3 comprises a main collar 31 and a locking collar 32, and the metal outer collar 3 is wrapped on the outer surface of the fiber reinforced inner collar 2 to play roles in increasing the strength of the buckle arrestor and resisting the bending of the pipeline. The main collar 31 is a metal cylinder, preferably of steel material, having a length slightly greater than the length of the fibre-reinforced inner collar 2, in a proportion of about 110% to 115%. Both ends of the inner wall are specially processed: one end is provided with a convex ring 33 through a transition conical surface, the inner diameter of the convex ring 33 is larger than the outer diameter of the composite pipe 1, and the convex ring 33 is matched with the profile of the transition conical surface 23 of the fiber reinforced layer 22; the inner wall of the other end is provided with internal threads 34. The inner diameter of the main collar 31 is slightly smaller than the outer diameter of the fibre-reinforced inner collar 2, whereby the main collar 31 is snapped in and thereby creates an interference contact. The locking collar 32 is a circular ring with a trapezoidal section, the material of the locking collar is consistent with that of the main collar 31, the inner diameter of the locking collar is larger than the outer diameter of the pipe body, and external threads are processed on the outer portion of the locking collar and matched with the internal threads 34 of the main collar. The front end surface of the locking collar 32 is a conical surface which is matched with the profile of the transition conical surface 23. In addition, the inner walls of the locking lantern ring 32 and the protruding ring 33 are provided with elastic sealing gaskets 35, the elastic sealing gaskets 35 are thin-walled circular rings made of high-strength rubber, the rubber is required to have waterproof, anti-corrosion and fatigue-resistant performances, the thickness of the elastic sealing gaskets 35 is larger than the difference between the inner diameter of the protruding ring 35 of the main lantern ring 31 and the outer diameter of the composite pipe 1, and the difference between the inner diameter of the locking lantern ring 32 and the outer diameter of the composite pipe 1 is used for achieving the purpose that certain initial interference is generated by extrusion between the two structural gaps so as to protect the pipe body, disperse stress and absorb shock.
For convenient installation, the main lantern ring 31 is designed into two saddle plates with semicircular sections, one side (side A) of each saddle plate is hinged, the other side (side B) of each saddle plate is connected through a bolt to form a complete main lantern ring, the bolt connection part is a radially protruding strip flange plate 36, and a threaded hole 37 is machined in the bolt connection part. When the two saddle plates are butted, the threaded holes 37 at the same position are aligned while the two eye plates 36 are tightly attached. The locking lantern ring 32 can be processed into two symmetrical semi-circular rings, and the outer surface of the locking lantern ring 32 spliced by the semi-circular rings forms complete external threads which can be butted with the internal threads 34 of the main lantern ring.
For the combined buckle arrestor described in this embodiment, specifically, when in use, the fiber-reinforced inner collar may be set in various ways, and may be set by peeling off the outer protection layer of the composite pipe, or may be directly set outside the composite pipe reinforcement layer where the outer protection layer is not yet prepared in the pipeline manufacturing process. Firstly, selecting a position of a buckle arrestor, bidirectionally winding a fiber preimpregnation winding belt at a specified position according to a certain angle until a fiber reinforced layer reaches a specified thickness, in the processing process, making the winding starting point and the winding end point of each layer different, thereby processing two ends of the fiber reinforced layer into transition conical surfaces, and preparing the fiber reinforced layer after a substrate is cooled and solidified; and then, uniformly processing a matrix protective layer on the outer side of the fiber reinforced layer, and enabling the matrix protective layer, the outer protective layer of the composite pipe, the matrix protective layer, the fiber reinforced layer and the fiber reinforced layer to be hot-melt bonded without gaps between the fiber reinforced layer and the reinforced layer of the composite pipe, so that the fiber reinforced inner lantern ring and the composite pipe are fused into a whole.
After the fiber reinforced inner lantern ring is prepared, the main lantern ring provided with the elastic sealing washer is buckled and pressed on the outer side of the fiber reinforced inner lantern ring, the transition conical surface of the convex ring of the main lantern ring is enabled to be tightly attached to the transition conical surface of the fiber reinforced inner lantern ring through slight movement, the structural position is maintained, and the main lantern ring is locked by a bolt; then, the locking lantern rings are butted to enable the thread passage to be complete, an elastic sealing washer is arranged, then the locking lantern rings are screwed between the main lantern ring and the composite pipe until the front end face of each locking lantern ring is tightly attached to the transition conical surface of the fiber reinforced inner lantern ring and generates certain interference, finally, the threads are locked, the whole installation process is completed, at the moment, the metal outer lantern ring generates interference contact on the fiber reinforced inner lantern ring and limits axial displacement, and the schematic diagram of the overall structure is shown in figure 1.
According to the combined buckle arrestor provided by the embodiment of the invention, the fiber reinforced inner lantern ring is of a structure which is bonded with the composite pipe into a whole, is used for improving the local strength, particularly the hoop rigidity, of the pipeline, can be regarded as a part of the reinforcing layer, the performance of the structural section of the buckle arrestor pipe section is consistent with that of other pipe sections, and the buckling resistance of the pipeline is effectively improved while the other performances of the pipeline are not weakened. In the fiber reinforced inner sleeve ring, the fiber type, the density, the winding angle and the like of the fiber reinforced layer can be adjusted according to the actual requirements of the pipeline to enhance the buckling resistance, so that the flexibility is high; the conical surface transition of the two ends of the fiber reinforced layer smoothes the stress distribution, and prevents the stress concentration of the transition section; the matrix protective layer effectively protects the fiber-reinforced layer.
In order to make up for some defects after the fiber reinforced outer lantern ring is arranged, the metal outer lantern ring is matched with the fiber reinforced outer lantern ring, the metal outer lantern ring also has the effect of bending stopping, the interference fit with the fiber reinforced inner lantern ring is formed through buckling, the internal and external pressure loads borne by the fiber reinforced layer are reasonably shared, the annular rigidity of the bending stopper is further increased, the bending of a pipeline at the section of the bending stopper is overcome through the rigidity of a metal component so as to reduce local bending stress, meanwhile, the fiber reinforced inner lantern ring which is easy to cause excessive wear and damage due to local protrusion in laying is protected, and a good auxiliary effect is achieved. The existence of the metal outer sleeve ring increases the overall strength of the buckle arrestor, and the structural design is ingenious and reasonable.
In the metal outer sleeve ring, the elastic sealing washer is arranged, so that the problem that the fiber reinforced inner sleeve ring is easily worn at a non-interference section of the metal outer sleeve ring is solved, and the fiber reinforced inner sleeve ring also has a sealing function; the left and right transition conical surfaces are matched with the conical surfaces at the two ends of the fiber reinforced layer for transition, and the metal outer sleeve ring is axially fixed through interference fit of the conical surfaces, so that excessive interference pressure is not required to be formed on the outer surface of the fiber reinforced outer sleeve ring for utilizing friction for limiting, the defect of the directional performance of the composite pipe is considered, and excessive radial deformation of the pipeline of the buckle arrestor section is avoided; the buckling pressure of the metal lantern ring only acts on the fiber reinforced inner lantern ring, and the pipe section with the fiber reinforced inner lantern ring has higher strength to bear the radial deformation caused by the buckling pressure of the metal outer lantern ring; the halving structure of the metal outer collar and the locking collar facilitates the installation and the disassembly of the buckle arrestor, and the design of the locking collar facilitates the adjustment of the matching degree between the metal outer collar and the fiber reinforced inner collar.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.
Claims (9)
1. A combined buckle arrestor for a submarine fiber reinforced composite flexible pipe, which comprises an outer protective layer, a reinforcing layer and an inner liner layer from outside to inside in sequence, is characterized in that the combined buckle arrestor comprises a fiber reinforced inner lantern ring and a metal outer lantern ring, wherein the fiber reinforced inner lantern ring is arranged at the outer side of the reinforcing layer of the composite flexible pipe and is in hot melt bonding with the reinforcing layer of the composite flexible pipe; the metal outer collar is arranged on the outer side of the fiber reinforced inner collar and is in interference fit with the fiber reinforced inner collar,
the metal outer sleeve comprises a main sleeve ring and a locking sleeve ring, the main sleeve ring is a cylindrical sleeve, a raised ring is arranged on the inner wall of one end of the main sleeve ring, and an internal thread is processed on the inner wall of the other end of the main sleeve ring; the locking lantern ring is arranged between the main lantern ring with the inner thread end and the composite flexible pipe and is in threaded connection with the main lantern ring.
2. The combination buckle arrestor of claim 1, wherein: the fiber reinforced inner lantern ring comprises a fiber reinforced layer and a substrate protective layer, the fiber reinforced layer covers and is bonded on the outer side of the reinforced layer of the composite flexible pipe, the substrate protective layer covers and is bonded on the outer side of the fiber reinforced layer and is bonded with the outer protective layer of the composite flexible pipe, and the fiber reinforced inner lantern ring and the composite flexible pipe are bonded into a whole through hot melting.
3. The combined buckle arrestor of claim 2, wherein: the two ends of the fiber reinforced inner lantern ring are respectively transited to the composite flexible pipe through a transition conical surface, and the bulge ring and the locking lantern ring are matched with the transition conical surface.
4. The combined buckle arrestor of claim 2, wherein: the thickness of the fiber reinforced layer is not less than that of the composite flexible pipe reinforced layer, the thickness of the base protective layer is not less than that of the outer protective layer of the composite flexible pipe, and the length of the base protective layer is consistent with that of the fiber reinforced layer.
5. The combined buckle arrestor of claim 3 or 4, wherein: elastic sealing washers are further arranged on the inner walls of the protruding rings and the inner wall of the locking lantern ring, and the elastic sealing washers are high-density rubber circular rings.
6. The combination buckle arrestor of claim 5, wherein: the inner diameter of the main lantern ring is slightly smaller than the outer diameter of the fiber reinforced inner lantern ring, and the inner diameter of the bulge ring is larger than the outer diameter of the composite flexible pipe.
7. The combined buckle arrestor of claim 6, wherein: the length of the main collar is greater than the length of the fiber reinforced inner collar.
8. The combination buckle arrestor of claim 7, wherein: the main lantern ring consists of two symmetrical saddle plates with semicircular sections, one sides of the two saddle plates are hinged, and the other sides of the two saddle plates are connected through bolts.
9. The combination buckle arrestor of claim 8, wherein: the locking lantern ring is formed by splicing two semicircular rings, and the outer surfaces of the two semicircular rings are provided with intercommunicated external threads.
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| CN201710785241.5A CN107687558B (en) | 2017-09-04 | 2017-09-04 | Combined buckle arrestor for submarine fiber reinforced composite flexible pipe |
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| US11512738B2 (en) | 2019-04-11 | 2022-11-29 | Goodrich Corporation | Hybrid metallic/composite joint with separate internal bearing |
| US10626917B1 (en) | 2019-04-11 | 2020-04-21 | Goodrich Corporation | Hybrid metallic/composite joint with separate internal bearing |
| CN114645976A (en) * | 2020-12-21 | 2022-06-21 | 中国石油化工股份有限公司 | Fiber prepreg tape reinforced composite pipe and processing method thereof |
| CN112460341B (en) * | 2020-12-25 | 2021-07-09 | 君海管业(山东)有限公司 | Environment-friendly anti-explosion PE pipe with good stability |
| CN115923165B (en) * | 2022-09-30 | 2023-12-01 | 中国人民解放军陆军工程大学 | Extrusion-molded composite material and metal piece thread-shaped connecting structure and method |
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| CN102943925A (en) * | 2012-10-23 | 2013-02-27 | 中国海洋石油总公司 | Deepwater subsea pipeline flexion stopper |
| KR20130131842A (en) * | 2012-05-25 | 2013-12-04 | 삼성중공업 주식회사 | Buckling arrester |
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| CN105276287A (en) * | 2014-07-10 | 2016-01-27 | 中国石油大学(北京) | Submarine pipeline clipping-in type buckle arrestor based on fiber reinforced plastics (FRP) |
| CN107044572A (en) * | 2017-06-22 | 2017-08-15 | 中国海洋大学 | A kind of effective precompressed of ocean composite and flexible is from tight coupling |
| CN207279143U (en) * | 2017-09-04 | 2018-04-27 | 中国海洋大学 | A kind of seabed fiber-reinforced composite flexible pipe combined type buckle arrestor |
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| CN102062258A (en) * | 2010-12-23 | 2011-05-18 | 天津大学 | Submarine pipeline bending arrestor with stability support and fixing method thereof |
| KR20130131842A (en) * | 2012-05-25 | 2013-12-04 | 삼성중공업 주식회사 | Buckling arrester |
| CN102943925A (en) * | 2012-10-23 | 2013-02-27 | 中国海洋石油总公司 | Deepwater subsea pipeline flexion stopper |
| CN105240617A (en) * | 2014-07-10 | 2016-01-13 | 中国石油大学(北京) | Winding type submarine pipeline buckle arrestor based on fiber reinforced plastic (FRP) |
| CN105276287A (en) * | 2014-07-10 | 2016-01-27 | 中国石油大学(北京) | Submarine pipeline clipping-in type buckle arrestor based on fiber reinforced plastics (FRP) |
| CN107044572A (en) * | 2017-06-22 | 2017-08-15 | 中国海洋大学 | A kind of effective precompressed of ocean composite and flexible is from tight coupling |
| CN207279143U (en) * | 2017-09-04 | 2018-04-27 | 中国海洋大学 | A kind of seabed fiber-reinforced composite flexible pipe combined type buckle arrestor |
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| CN107687558A (en) | 2018-02-13 |
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