Sea-communicating flexible connecting pipe with double-layer flexible pipe body structure

Abstract

The invention discloses a marine flexible connecting pipe with a double-layer flexible pipe body structure, which comprises an inner-layer rubber flexible pipe, an outer-layer metal corrugated pipe, a sealing flange, a locking flange and a fastening ring, and is characterized in that the inner-layer rubber flexible pipe is arranged in the outer-layer metal corrugated pipe in a penetrating manner; the two sealing flanges are arranged on the outer sides of the end portions of the two ends of the inner-layer rubber flexible pipe respectively, and the two locking flanges are arranged on the outer sides of the end portions of the two ends of the outer-layer metal corrugated pipe respectively and connected with the end portions of the two ends of the inner-layer rubber flexible pipe and the end portions of the two ends of the outer-layer metal corrugated pipe respectively. The number of the fastening rings is two, and the fastening rings are arranged on the inner sides of the two ends of the inner-layer rubber flexible pipe respectively and correspondingly clamped between the sealing flange and the locking flange which are arranged at the same end. The invention has the advantages that: the safety is high, and the service life is long; the damping effect is good; connection is simple and reliable, and maintenance is convenient; the size is small, and optimized space application of a pipeline system is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of deep-sea pipelines, in particular to a sea-going flexible pipe with a double-layer flexible pipe body structure. Background Art

[0002] For the piping system of deep-sea structures, in order to reduce the transmission of vibration to the structure when the system is working and compensate for the additional displacement caused by the stress and deformation of the structure, a high-safety vibration-damping nozzle is needed at the connection between the seawater pipeline and the structure, and at the same time meet the flexible nozzle balance requirements, displacement compensation capacity requirements, working pressure requirements and vibration reduction performance requirements. However, there is currently no vibration-damping nozzle that meets the above requirements in China. Summary of the invention

[0003] The object of the present invention is to provide a sea-going flexible pipe with a double-layer flexible pipe body structure, so as to solve the technical problems existing in the background technology.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A sea-going flexible pipe connection with a double-layer flexible pipe body structure comprises an inner rubber flexible pipe, an outer metal bellows, a sealing flange, a locking flange and a fastening ring. The inner rubber flexible pipe is passed through the outer metal bellows. There are two sealing flanges, which are arranged on the outside of the ends at both ends of the inner rubber flexible pipe. There are two locking flanges, which are arranged on the outside of the ends at both ends of the outer metal bellows and are respectively connected to the ends at both ends of the inner rubber flexible pipe and the ends at both ends of the outer metal bellows. There are two fastening rings, which are arranged on the inside of the ends at both ends of the inner rubber flexible pipe and are respectively clamped between the sealing flange and the locking flange arranged at the same end.

[0006] Furthermore, the inner rubber flexible tube comprises an inner rubber layer, an outer rubber layer and a skeleton layer arranged between the inner rubber layer and the outer rubber layer; the inner two ends of the inner rubber layer are vulcanized into one with the two sealing flanges in one-to-one correspondence, the outer side of the inner rubber layer is vulcanized into one with the skeleton layer, the two ends of the skeleton layer are clamped on the two fastening rings by a back-folding manner, and the two ends of the outer rubber layer are respectively vulcanized into one with the two sealing flanges and the two fastening rings in one-to-one correspondence.

[0007] Furthermore, the outer metal bellows includes a metal bellows body, two metal bellows body flanges respectively arranged at both ends of the metal bellows body, and a plurality of restraint rings embedded in the trough positions of the metal bellows body. The two ends of the metal bellows body are connected one-to-one with the two locking flanges through the two metal bellows body flanges.

[0008] Furthermore, at least one sealing ring A is embedded in each of the sealing flanges on a side away from the inner rubber flexible tube.

[0009] Furthermore, at least one sealing ring B is embedded in the side of each metal bellows body flange close to the corresponding locking flange.

[0010] Furthermore, each of the sealing flanges is provided with a plurality of circular holes A in its circumference, each of the locking flanges is provided with a plurality of screw holes A in its circumference, and each of the fastening rings is provided with a plurality of circular holes B in its circumference. A bushing is passed through each circular hole B, and both ends of each bushing pass through the inner rubber flexible tube and are respectively passed through the corresponding sealing flange and locking flange, and are respectively connected with a circular hole A on the sealing flange and a screw hole A on the locking flange.

[0011] Furthermore, each of the locking flanges is provided with a plurality of light holes in the circumference thereof, and each light hole is used for installing a screw connected to the outer metal bellows.

[0012] Furthermore, the skeleton layer adopts a multi-layer aramid cord structure.

[0013] Furthermore, a plurality of screw holes B are provided on the circumference of each of the metal bellows pipe body flanges.

[0014] Compared with the prior art, the advantages of the present invention are as follows:

[0015] (1) High safety and long service life: It adopts the combination of inner rubber flexible tube and outer metal bellows. The inner tube adopts the commonly used balanced rubber flexible tube body, which can realize the function of vibration reduction tube under normal working conditions; the outer tube body adopts the metal bellows body, which can keep the tube working normally under the working pressure when the inner rubber tube body fails;

[0016] (2) The vibration reduction effect is good and can well meet the requirements of the flexible pipe for balance and displacement compensation capability.

[0017] (3) The connection is simple and reliable, and easy to maintain. The outer metal bellows is integrally embedded between the flanges at both ends of the inner rubber flexible pipe. The flanges at both ends are connected to the flanges of the inner rubber flexible pipe by screws and sealing rings. This is not only simple and reliable in sealing, but also easy to maintain.

[0018] (4) Small size, which is conducive to optimizing the spatial utilization of the pipeline system: The embedded structure design between the outer metal bellows and the inner rubber flexible pipe can make the overall size of the double-layer pipe smaller, which is conducive to optimizing the spatial utilization of the pipeline system.

[0019] The innovations of the present invention mainly lie in the following two points:

[0020] Firstly, the sea-going flexible pipe with a double-layer flexible pipe body structure provided by the present invention is composed of an inner rubber flexible pipe and an outer metal bellows. Under normal working conditions, only the inner rubber flexible pipe works. When the inner rubber flexible pipe reaches the end of its service life or encounters accidental damage, the outer metal bellows can work normally under the nominal working pressure.

[0021] Secondly, the sea-going flexible connecting pipe with a double-layer flexible pipe body structure provided by the present invention adopts a specially designed flange structure (composed of a sealing flange, a locking flange and a fastening ring). After the skeleton layer in the inner rubber flexible pipe is fixed by the fastening ring, the inner and outer flanges composed of the sealing flange and the locking flange are locked to form a safe anti-pull-out structure, which can well lock the inner rubber flexible pipe and the outer metal bellows together to prevent the two from loosening. On the one hand, it can ensure normal operation of the outer pipe after the inner pipe fails, and on the other hand, it realizes the feasibility of manufacturing and processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution in this embodiment, the following is a brief introduction to the drawings required for use in the description of the embodiment. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 is a schematic cross-sectional view of a sea-going flexible pipe having a double-layer flexible pipe body structure provided by an embodiment of the present invention;

[0024] Figure 2 It is a schematic diagram of the connection between the inner rubber flexible pipe and the sealing flange of the sea-going flexible pipe connection having a double-layer flexible pipe body structure provided by an embodiment of the present invention;

[0025] Figure 3 yes Figure 2 Explosion diagram of

[0026] Figure 4 It is a schematic diagram of the connection between the outer metal bellows and the locking flange of the sea-going flexible pipe having a double-layer flexible pipe body structure provided by an embodiment of the present invention;

[0027] Figure 5 yes Figure 3 Explosion diagram of

[0028] Explanation of the reference numerals: 100, inner rubber flexible tube; 101, inner rubber layer; 102, skeleton layer; 103, outer rubber layer; 200, outer metal bellows; 201, metal bellows body; 202, metal bellows body flange; 203, restraining ring; 300, sealing flange; 400, locking flange; 500, fastening ring; 600, sealing ring A; 700, sealing ring B; 800, bushing; 900, screw. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The present invention will be further described below in conjunction with the accompanying drawings:

[0033] like Figure 1As shown, an embodiment of the present invention provides a sea-going flexible pipe having a double-layer flexible pipe body structure, comprising an inner rubber flexible pipe 100, an outer metal bellows 200, a sealing flange 300, a locking flange 400 and a fastening ring 500. The inner rubber flexible pipe 100 is inserted into the outer metal bellows 200. There are two sealing flanges 300, which are respectively arranged on the outer side of the ends at both ends of the inner rubber flexible pipe 100. There are two locking flanges 400, which are respectively arranged on the outer side of the ends at both ends of the outer metal bellows 200 and connected to the ends at both ends of the inner rubber flexible pipe 100 and the ends at both ends of the outer metal bellows 200, respectively. There are two fastening rings 500, which are respectively arranged on the inner side of the ends at both ends of the inner rubber flexible pipe 100 and are respectively clamped between the sealing flange 300 and the locking flange 400 arranged at the same end.

[0034] Specifically, in the embodiment of the present invention, Figure 2 and Figure 3 As shown, the inner rubber flexible tube 100 comprises an inner rubber layer 101, an outer rubber layer 103 and a skeleton layer 102 arranged between the inner rubber layer 101 and the outer rubber layer 103; wherein, the inner two ends of the inner rubber layer 101 are vulcanized into one with two sealing flanges 300 in one-to-one correspondence, and the outer side of the inner rubber layer 101 is vulcanized into one with the skeleton layer 102, which can play a role in sealing the fluid in the tube; the two ends of the skeleton layer 102 are tightly clamped on the two fastening rings 500 by turning back, which can play a role in preventing the tube body from being pulled off; the two ends of the outer rubber layer 103 are respectively vulcanized into one with two sealing flanges 300 and two fastening rings 500 in one-to-one correspondence, which can play a role in protecting the skeleton layer 102 and sealing.

[0035] Specifically, in the embodiment of the present invention, Figure 4 and Figure 5 As shown, the outer metal bellows 200 comprises a metal bellows body 201, two metal bellows body flanges 202 disposed at both ends of the metal bellows body 201, and a plurality of restraint rings 203 embedded in the trough positions of the metal bellows body 201. The two ends of the metal bellows body 201 are connected to two locking flanges 400 in a one-to-one correspondence through the two metal bellows body flanges 202. More specifically, the metal bellows body 201 is a tubular structure composed of a plurality of wave crests and a plurality of wave troughs, wherein the corresponding restraint rings 203 are embedded in the trough positions.

[0036] Specifically, in the embodiment of the present invention, Figure 1 and Figure 2 Two sealing rings A600 are embedded in each sealing flange 300 on the side away from the inner rubber flexible tube 100. The purpose of setting the two sealing rings A600 is to improve the sealing performance of the sea-going flexible pipe provided by the present invention when connected with the external pipeline.

[0037] It is understandable that the number of sealing rings A600 can be increased or decreased according to actual needs; the greater the number, the better the sealing performance.

[0038] Specifically, in the embodiment of the present invention, Figure 4 and Figure 5 As shown, two sealing rings B700 are embedded on one side of each metal bellows body flange 202 close to the corresponding locking flange 400. The purpose of setting these two sealing rings B700 is to improve the sealing performance of the connection between the outer metal bellows 200 and the inner rubber flexible tube 100.

[0039] It is understandable that the number of sealing rings B700 can be increased or decreased according to actual needs; the greater the number, the better the sealing performance.

[0040] Specifically, in the embodiment of the present invention, each sealing flange 300 is provided with a plurality of circular holes A301 in the circumference, each locking flange 400 is provided with a plurality of screw holes 401 in the circumference, each fastening ring 500 is provided with a plurality of circular holes B501 in the circumference, each circular hole B501 is penetrated with a bushing 800, and both ends of each bushing 800 penetrate the inner rubber flexible tube 100 and are respectively penetrated in the corresponding sealing flange 300 and locking flange 400, and are respectively connected with a circular hole A301 on the sealing flange 300 and a screw hole 401 on the locking flange 400. The bushing 800 is used to form a mounting screw hole for the pipe between the sealing flange 300 and the locking flange 400, so as to facilitate the back flipping of the skeleton layer 102 and prevent the rubber from entering the screw hole during vulcanization.

[0041] Specifically, in the embodiment of the present invention, a plurality of light holes 402 are provided in the circumference of each locking flange 400 , and each light hole 402 is used to install a screw 900 connected to the outer metal bellows 200 .

[0042] Specifically, in the embodiment of the present invention, a plurality of screw holes B204 are provided in the circumference of each metal bellows body flange 202 for installing screws 900 for connecting the locking flange 400 .

[0043] Specifically, in the embodiment of the present invention, the skeleton layer 102 adopts a multi-layer aramid cord structure to bear the internal pressure of the tube body.

[0044] Specifically, the sealing flange 300 has several main functions: first, it is connected and fastened with the flange of the connected pipe (i.e., the external pipeline) by screws; second, it is sealed with the flange of the connected pipe (i.e., the external pipeline) through the sealing ring A600; third, it is used together with the locking flange 400 and the fastening ring 500 to compress the skeleton layer 102 and the outer rubber layer 103 of the inner rubber flexible tube 100.

[0045] Specifically, the locking flange 400 has the function of locking the folded back part of the skeleton layer 102 and pressing the connecting pipe flange (ie, the sealing flange 300 and the metal bellows body flange 202).

[0046] Specifically, the function of the fastening ring 500 is to provide support for the skeleton layer 102 when it is turned back.

[0047] Specifically, the outer metal bellows 200 has the function of bearing the fluid pressure in the connecting pipe and sealing when the inner rubber flexible pipe 100 fails, so as to keep the connecting pipe working normally under the working pressure.

[0048] Specifically, the function of the restraining ring 203 is to withstand the pressure inside the connecting pipe and maintain the outer metal bellows 200 in a normal working shape.

[0049] Finally, it should be noted that the above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A sea-going flexible pipe with a double-layer flexible pipe body structure, characterized in that: The invention comprises an inner rubber flexible tube (100), an outer metal bellows (200), a sealing flange (300), a locking flange (400) and a fastening ring (500). The inner rubber flexible tube (100) is inserted into the outer metal bellows (200). There are two sealing flanges (300) and they are arranged outside the ends at both ends of the inner rubber flexible tube (100). There are two locking flanges (400) and they are arranged outside the ends at both ends of the outer metal bellows (200) and they are respectively connected to the ends at both ends of the inner rubber flexible tube (100) and the ends at both ends of the outer metal bellows (200). There are two fastening rings (500) and they are arranged inside the ends at both ends of the inner rubber flexible tube (100) and they are respectively clamped between the sealing flange (300) and the locking flange (400) arranged at the same end.

2. The sea-going flexible pipe with a double-layer flexible pipe body structure according to claim 1, characterized in that: The inner rubber flexible tube (100) comprises an inner rubber layer (101), an outer rubber layer (103) and a skeleton layer (102) arranged between the inner rubber layer (101) and the outer rubber layer (103); the inner two ends of the inner rubber layer (101) are vulcanized into one with the two sealing flanges (300) in a one-to-one correspondence, the outer side of the inner rubber layer (101) is vulcanized into one with the skeleton layer (102), the two ends of the skeleton layer (102) are clamped on the two fastening rings (500) by a back-turning method, and the two ends of the outer rubber layer (103) are respectively vulcanized into one with the two sealing flanges (300) and the two fastening rings (500) in a one-to-one correspondence.

3. The sea-going flexible pipe with a double-layer flexible pipe body structure according to claim 1, characterized in that: The outer metal bellows (200) comprises a metal bellows body (201), two metal bellows body flanges (202) respectively arranged at the two ends of the metal bellows body (201), and a plurality of restraint rings (203) embedded in the trough positions of the metal bellows body (201); the two ends of the metal bellows body (201) are connected to the two locking flanges (400) in a one-to-one correspondence via the two metal bellows body flanges (202).

4. The sea-going flexible pipe with a double-layer flexible pipe body structure according to claim 1, characterized in that: At least one sealing ring A (600) is embedded in each of the sealing flanges (300) on a side away from the inner rubber flexible tube (100).

5. The sea-going flexible pipe with a double-layer flexible pipe body structure according to claim 3, characterized in that: At least one sealing ring B (700) is embedded in the side of each metal bellows body flange (202) close to the corresponding locking flange (400).

6. The sea-going flexible pipe with a double-layer flexible pipe structure according to claim 1, characterized in that: Each of the sealing flanges (300) is provided with a plurality of circular holes A (301) in the circumference, each of the locking flanges (400) is provided with a plurality of screw holes A (401) in the circumference, and each of the fastening rings (500) is provided with a plurality of circular holes B (501) in the circumference. A bushing (800) is passed through each circular hole B (501), and both ends of each bushing (800) pass through the inner rubber flexible tube (100) and are respectively passed through the corresponding sealing flange (300) and locking flange (400), and are respectively connected with a circular hole A (301) on the sealing flange (300) and a screw hole A (401) on the locking flange (400).

7. The sea-going flexible pipe with a double-layer flexible pipe body structure according to claim 1, characterized in that: A plurality of light holes (402) are also provided in the circumference of each locking flange (400), and each light hole (402) is used to install a screw (900) connected to the outer metal bellows (200).

8. The sea-going flexible pipe with a double-layer flexible pipe body structure according to claim 2, characterized in that: The skeleton layer (102) adopts a multi-layer aramid cord fabric structure.

9. The sea-going flexible pipe with a double-layer flexible pipe structure according to claim 3, characterized in that: A plurality of screw holes B (204) are also provided in the circumference of each of the metal bellows pipe body flanges (202).

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