CN215334931U - Joint suitable for low-pressure marine flexible composite pipeline - Google Patents
Joint suitable for low-pressure marine flexible composite pipeline Download PDFInfo
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- CN215334931U CN215334931U CN202121565633.9U CN202121565633U CN215334931U CN 215334931 U CN215334931 U CN 215334931U CN 202121565633 U CN202121565633 U CN 202121565633U CN 215334931 U CN215334931 U CN 215334931U
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Abstract
The utility model discloses a joint suitable for a low-pressure marine flexible composite pipeline, which comprises a joint front end, a joint core, a first joint outer sleeve and a second joint outer sleeve, wherein the joint realizes the fixation of an internal pressure sealing layer through the joint core, meanwhile, the sealing reliability of the internal pressure sealing layer is improved through double sealing, and the joint further improves the requirements on the strength and the sealing property of the marine flexible composite pipeline joint with a skeleton-layer-free structure through the combination of mechanical connection and epoxy resin perfusion sealing connection among all layers.
Description
Technical Field
The utility model relates to a joint, in particular to a joint suitable for a low-pressure marine flexible composite pipeline, and belongs to the technical field of marine flexible composite pipelines.
Background
The marine petroleum pipeline is divided into a steel pipe and a flexible pipe. At present, most flexible pipes suitable for conveying seabed media are flexible composite pipelines which are formed by compounding high polymer materials and metal materials, and compared with steel pipes, the flexible composite pipelines have the remarkable advantages of being easy to bend, easy to lay, long in service life, low in total investment and the like. With the technology of the flexible composite pipeline becoming more mature in China, the flexible composite pipeline is put into use in more and more oil and gas fields in China. Because the continuous length of the flexible composite pipeline is limited, joints are required to be arranged at the end parts of each pipeline, the joints play a role in connecting the end parts of the flexible pipelines, well heads, stand pipes and buoys, the flexible composite pipeline suitable for shallow sea puts higher requirements on the sealing performance, strength and service life of the pipeline joints due to the special structure that the pipeline does not have an inner framework layer, and the traditional joint for the shallow sea low-pressure pipeline mostly adopts a buckling mode which cannot ensure the sealing performance and reliability of the flexible pipeline without the framework layer structure.
It is against this background that the present patent application proposes a joint suitable for use in low pressure marine flexible composite pipelines.
SUMMERY OF THE UTILITY MODEL
The main object of the present invention is to overcome the above mentioned drawbacks of the prior art and to provide a joint suitable for low pressure marine flexible composite pipelines.
The utility model is realized by the following technical scheme:
a joint suitable for a low-pressure marine flexible composite pipeline comprises a joint front end, a joint core, a first joint outer sleeve and a second joint outer sleeve;
the joint front end is an inner pipe forged piece with a convex middle part, the convex middle end of the joint front end is connected with the inner wall of the front end of the first joint outer sleeve through a bolt, and a first O-shaped sealing ring and a second O-shaped sealing ring are arranged at the contact part of the joint front end and the first joint outer sleeve;
the joint core is installed at the bottom end of the middle part of the front end of the joint through a fixing pin, a first insulating pad and a second insulating pad are arranged at the contact part of the fixing pin and the front end of the joint, and the joint core is fixedly connected with an internal pressure sealing layer of a pipeline through internal expansion;
a first sealing groove is formed in one side, close to the pipeline, of the rear part of the front end of the joint, a first sealing ring, a first steel ring and a second sealing ring are sequentially arranged in the first sealing groove, and the first sealing ring, the first steel ring and the second sealing ring are in contact connection with the end face of an internal pressure sealing layer of the pipeline; the rear end part of the front end of the joint is connected with a first sealing flange through a bolt, and a gap exists between the first sealing flange and the rear end part of the front end of the joint; the rear end part of the first sealing flange is fixedly connected with a pressure-resistant armor layer of the pipeline through welding;
the first joint outer sleeve is provided with a glue injection hole; the rear part of the first joint outer sleeve is provided with a sealing sleeve, the end part of the sealing sleeve, far away from the pipeline, is of a concave structure, the rear part of the first joint outer sleeve is embedded into the concave end part of the sealing sleeve, three groups of third O-shaped sealing rings are arranged at the contact part of the rear end part of the first joint outer sleeve and the inner wall of the concave end part of the sealing sleeve, and the end part of the second joint outer sleeve is respectively connected with the sealing sleeve and the rear part of the first joint outer sleeve through bolts; a pipe fitting is arranged in the seal sleeve;
a convex structure is arranged at the side end of one side, close to the pipeline, of the sealing sleeve, a second sealing groove is arranged at one side, close to the pipeline, of the convex structure of the sealing sleeve, a third sealing ring, a second steel ring and a fourth sealing ring are sequentially arranged in the second sealing groove, and the sealing sleeve, the third sealing ring, the second steel ring and the fourth sealing ring are in contact connection with the end face of the collapse-resistant layer of the pipeline; the rear end part of the convex structure of the sealing sleeve is connected with a second sealing flange through a bolt;
an anti-crushing layer fixing piece is arranged in a cavity formed by the second joint outer sleeve and is mounted on an anti-crushing layer of the pipeline through bolts, the anti-crushing layer fixing piece is a group of trisected open circular rings, and each circular ring is provided with a thread for increasing axial fixing force;
the rear side of the seal sleeve is connected with a tensile armor fixing piece through a long bolt, the long bolt is used for fixing the tensile armor fixing piece through a limiting nut, the tensile armor fixing piece is positioned in a cavity formed by the second joint outer sleeve, one side, close to the anti-crushing layer fixing piece, of the tensile armor fixing piece is of an arc structure, the outer side face of the arc structure of the tensile armor fixing piece is welded with the tensile armor, and one side, close to the pipeline, of the tensile armor fixing piece is connected with the armor tensile layer and the outer covering layer of the pipeline;
an outer cladding layer fixing piece is arranged in a cavity formed by the rear part of the tensile armor layer fixing piece and the second connector outer sleeve and is installed on an outer cladding layer of a pipeline, the outer cladding layer fixing piece is a group of trisected open circular rings, and each circular ring is provided with a thread for increasing axial fixing force;
a third sealing groove is formed in one side, close to the pipeline, of the rear part of the second joint outer sleeve, a fifth sealing ring, a third steel ring and a sixth sealing ring are sequentially arranged in the third sealing groove, and the fifth sealing ring, the third steel ring and the sixth sealing ring are in contact connection with the end face of the outer cladding layer of the pipeline; the rear end part of the second joint outer sleeve is connected with a third sealing flange through a bolt, and glue injection holes are formed in the second joint outer sleeve corresponding to two cavities formed in the second joint outer sleeve.
The utility model has the beneficial effects that:
the joint suitable for the low-pressure marine flexible composite pipeline disclosed by the utility model realizes the fixation of the internal pressure sealing layer through the joint core, simultaneously improves the sealing reliability of the internal pressure sealing layer through double sealing, and further improves the requirements on the strength and the sealing property of the marine flexible composite pipeline joint with a frameless layer structure through the combination of mechanical connection and epoxy resin perfusion sealing connection between the joint and each layer.
The utility model is further illustrated with reference to the following figures and examples.
Drawings
FIG. 1 is a schematic view of the structure of a joint according to a preferred embodiment of the present invention.
The parts in the drawings are numbered as follows: 1. an internal pressure sealing layer; 2. a compression-resistant armor layer; 3. an anti-crushing layer; 4. a tensile armor layer; 5. an outer cladding layer; 6. a pipeline; 7. a joint front end; 8. a first joint housing; 9. a second joint housing; 10. a joint core; 11. a bolt; 12. a first O-ring seal; 13. a second O-ring seal; 14. injecting glue holes; 15. sealing sleeves; 16. a third O-shaped sealing ring; 17. a pipe fitting; 19. a long bolt; 20. a tensile armor layer fixture; 21. a limit nut; 22. an outer cladding fixture; 23. a third sealing flange; 25. a first insulating pad; 26. a fixing pin; 27. a second insulating pad; 28. an epoxy resin; 30. a first seal ring; 31. a first steel ring; 32. a second seal ring; 34. a first sealing flange; 35. a third seal ring; 36. a second steel ring; 37. a fourth seal ring; 38. a second sealing flange; 40. a collapse resistant layer fixture; 41. a fifth seal ring; 42. a third steel ring; 43. and a sixth sealing ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the joint suitable for the low-pressure marine flexible composite pipeline comprises a joint front end 7, a joint core 10, a first joint outer sleeve 8 and a second joint outer sleeve 9; the joint front end 7 is an inner pipe forged piece with a convex middle part, and the convex middle part of the joint front end 7 is connected with the contact part of the joint front end 7 and the first joint outer sleeve 8 through a bolt 11 and the inner wall of the front end of the first joint outer sleeve 8, and is provided with a first O-shaped sealing ring 12 and a second O-shaped sealing ring 13; the bottom end of the middle part of the joint front end 7 is provided with a joint core 10 through a fixing pin 26, a first insulating pad 25 and a second insulating pad 27 are arranged at the contact part of the fixing pin 26 and the joint front end 7, the fixing of the inner pressure sealing layer needs to consider the thermal deformation to cause the separation of the inner pressure sealing layer and the fixing force needs to overcome the self weight of the inner pressure sealing layer when in laying, so that the joint core 10 is fixedly connected with the inner pressure sealing layer 1 of the pipeline through internal expansion; a first sealing groove is formed in one side, close to the pipeline, of the rear part of the joint front end 7, a first sealing ring 30, a first steel ring 31 and a second sealing ring 32 are sequentially arranged in the first sealing groove, and the first sealing ring 30, the first steel ring 31 and the second sealing ring 32 are in contact connection with the end face of an internal pressure sealing layer 1 of the pipeline; the rear end part of the joint front end 7 is connected with a first sealing flange 34 through a bolt 11, a gap exists between the first sealing flange 34 and the rear end part of the joint front end 7, the first sealing ring 30 and the second sealing ring 32 are deformed through the extrusion of the bolt 11, and the extrusion degree is controlled through the distance between the first sealing flange 34 and the joint front end 7, so that the sealing is realized; the rear end part of the first sealing flange 34 is fixedly connected with the pressure-resistant armor layer 2 of the pipeline through welding; the first joint outer sleeve 8 is provided with a glue injection hole 14; a sealing sleeve 15 is arranged at the rear part of the first joint outer sleeve 8, the end part of the sealing sleeve 15, far away from the pipeline, is of a concave structure, the rear part of the first joint outer sleeve 8 is embedded into the concave end part of the sealing sleeve 15, three groups of third O-shaped sealing rings 16 are arranged at the contact part of the rear end part of the first joint outer sleeve 8 and the inner wall of the concave end part of the sealing sleeve 15, and the end part of the second joint outer sleeve 9 is respectively connected with the sealing sleeve 15 and the rear part of the first joint outer sleeve 8 through bolts 11; a pipe fitting 17 is arranged in the sealing sleeve 15; a convex structure is arranged at the side end of one side, close to the pipeline, of the sealing sleeve 15, a second sealing groove is arranged at one side, close to the pipeline, of the convex structure of the sealing sleeve 15, a third sealing ring 35, a second steel ring 36 and a fourth sealing ring 37 are sequentially arranged in the second sealing groove, and the sealing sleeve 15, the third sealing ring 35, the second steel ring 36 and the fourth sealing ring 37 are in contact connection with the end face of the collapse resistant layer 3 of the pipeline; the rear end part of the convex structure of the sealing sleeve 15 is connected with a second sealing flange 38 through a bolt 11; the inner part of a cavity formed by the second joint outer sleeve 9 is provided with a crushing-resistant layer fixing piece 40, the crushing-resistant layer fixing piece 40 is installed on a crushing-resistant layer 3 of the pipeline through a bolt 11, the crushing-resistant layer fixing piece 40 is a group of trisected open circular arc rings, and each circular arc ring is provided with a thread for increasing the axial fixing force; the rear side of the sealing sleeve 15 is connected with a tensile armor fixing piece 20 through a long bolt 19, the long bolt 19 fixes the tensile armor fixing piece 20 through a limiting nut 21, the tensile armor fixing piece 20 is located inside a cavity formed by the second joint outer sleeve 9, one side, close to the anti-crushing layer fixing piece 40, of the tensile armor fixing piece 20 is of an arc structure, the outer side face of the arc structure of the tensile armor fixing piece 20 is connected with the tensile armor 4 in a welding mode, one side, close to the pipeline, of the tensile armor fixing piece 20 is connected with the tensile armor 4 and the outer covering layer 5 of the pipeline, and the tensile armor 4 is fixed through the joint action of the bonding force of the tensile armor flat steel and the welding force of the tensile armor on the tensile armor fixing piece 20 after epoxy resin curing; an outer cladding layer fixing piece 22 is arranged in a cavity formed by the rear part of the tensile armor layer fixing piece 20 and the second connector outer sleeve 9, the outer cladding layer fixing piece 22 is installed on an outer cladding layer 5 of the pipeline, the outer cladding layer fixing piece 22 is a group of trisected open circular arc rings, and each circular arc ring is provided with a thread for increasing the axial fixing force; a third sealing groove is formed in one side, close to the pipeline, of the rear part of the second joint outer sleeve 9, a fifth sealing ring 41, a third steel ring 42 and a sixth sealing ring 43 are sequentially arranged in the third sealing groove, and the fifth sealing ring 41, the third steel ring 42 and the sixth sealing ring 43 are in contact connection with the end face of the outer cladding layer 5 of the pipeline; the rear end part of the second joint outer sleeve 9 is connected with a third sealing flange 23 through a bolt 11, and glue injection holes are formed in the second joint outer sleeve 9 corresponding to the two cavities formed by the second joint outer sleeve 9.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (1)
1. The joint suitable for the low-pressure marine flexible composite pipeline is characterized by comprising a joint front end (7), a joint core (10), a first joint outer sleeve (8) and a second joint outer sleeve (9);
the joint front end (7) is an inner pipe forged piece with a convex middle part, the convex middle part of the joint front end (7) is connected with the inner wall of the front end of the first joint outer sleeve (8) through a bolt (11), and a first O-shaped sealing ring (12) and a second O-shaped sealing ring (13) are arranged at the contact part of the joint front end (7) and the first joint outer sleeve (8);
the joint core (10) is installed at the bottom end of the middle part of the joint front end (7) through a fixing pin (26), a first insulating pad (25) and a second insulating pad (27) are arranged at the contact part of the fixing pin (26) and the joint front end (7), and the joint core (10) is fixedly connected with an inner pressure sealing layer (1) of a pipeline through internal expansion;
a first sealing groove is formed in one side, close to the pipeline, of the rear part of the joint front end (7), a first sealing ring (30), a first steel ring (31) and a second sealing ring (32) are sequentially arranged in the first sealing groove, and the first sealing ring (30), the first steel ring (31) and the second sealing ring (32) are in contact connection with the end face of an internal pressure sealing layer (1) of the pipeline; the rear end part of the joint front end (7) is connected with a first sealing flange (34) through a bolt (11), and a gap exists between the first sealing flange (34) and the rear end part of the joint front end (7); the rear end part of the first sealing flange (34) is fixedly connected with a pressure-resistant armor layer (2) of the pipeline through welding;
the first joint outer sleeve (8) is provided with a glue injection hole (14); a sealing sleeve (15) is arranged at the rear part of the first joint outer sleeve (8), the end part, far away from a pipeline, of the sealing sleeve (15) is of a concave structure, the rear part of the first joint outer sleeve (8) is embedded into the concave end part of the sealing sleeve (15), three groups of third O-shaped sealing rings (16) are arranged at the contact part of the rear end part of the first joint outer sleeve (8) and the inner wall of the concave end part of the sealing sleeve (15), and the end part of the second joint outer sleeve (9) is respectively connected with the sealing sleeve (15) and the rear part of the first joint outer sleeve (8) through bolts (11); a pipe fitting (17) is arranged in the sealing sleeve (15);
a protruding structure is arranged at the side end of one side, close to the pipeline, of the sealing sleeve (15), a second sealing groove is arranged at one side, close to the pipeline, of the protruding structure of the sealing sleeve (15), a third sealing ring (35), a second steel ring (36) and a fourth sealing ring (37) are sequentially arranged in the second sealing groove, and the sealing sleeve (15), the third sealing ring (35), the second steel ring (36) and the fourth sealing ring (37) are in contact connection with the end face of the collapse resistant layer (3) of the pipeline; the rear end part of the convex structure of the sealing sleeve (15) is connected with a second sealing flange (38) through a bolt (11);
an anti-crushing layer fixing piece (40) is arranged in a cavity formed by the second joint outer sleeve (9), the anti-crushing layer fixing piece (40) is installed on an anti-crushing layer (3) of the pipeline through a bolt (11), the anti-crushing layer fixing piece (40) is a group of trisection open circular rings, and each circular ring is provided with a thread for increasing the axial fixing force;
the rear side of the sealing sleeve (15) is connected with a tensile armor fixing piece (20) through a long bolt (19), the long bolt (19) is used for fixing the tensile armor fixing piece (20) through a limiting nut (21), the tensile armor fixing piece (20) is located inside a cavity formed by the second connector outer sleeve (9), one side, close to the collapse-resistant layer fixing piece (40), of the tensile armor fixing piece (20) is of an arc structure, the outer side face of the arc structure of the tensile armor fixing piece (20) is connected with the tensile armor layer (4) in a welding mode, and one side, close to the pipeline, of the tensile armor fixing piece (20) is connected with the tensile armor layer (4) and the outer covering layer (5) of the pipeline;
an outer cladding layer fixing piece (22) is arranged in a cavity formed by the rear part of the tensile armor layer fixing piece (20) and the second joint outer sleeve (9), the outer cladding layer fixing piece (22) is installed on an outer cladding layer (5) of a pipeline, the outer cladding layer fixing piece (22) is a set of trisected open circular rings, and each circular ring is provided with a thread for increasing axial fixing force;
a third sealing groove is formed in one side, close to the pipeline, of the rear portion of the second joint outer sleeve (9), a fifth sealing ring (41), a third steel ring (42) and a sixth sealing ring (43) are sequentially arranged in the third sealing groove, and the fifth sealing ring (41), the third steel ring (42) and the sixth sealing ring (43) are in contact connection with the end face of the outer cladding layer (5) of the pipeline; the rear end part of the second joint outer sleeve (9) is connected with a third sealing flange (23) through a bolt (11), and glue injection holes are formed in the second joint outer sleeve (9) corresponding to two cavities formed in the second joint outer sleeve (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121565633.9U CN215334931U (en) | 2021-07-12 | 2021-07-12 | Joint suitable for low-pressure marine flexible composite pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121565633.9U CN215334931U (en) | 2021-07-12 | 2021-07-12 | Joint suitable for low-pressure marine flexible composite pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215334931U true CN215334931U (en) | 2021-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121565633.9U Active CN215334931U (en) | 2021-07-12 | 2021-07-12 | Joint suitable for low-pressure marine flexible composite pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215334931U (en) |
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2021
- 2021-07-12 CN CN202121565633.9U patent/CN215334931U/en active Active
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