A connecting structure of a flexible composite high-pressure conveying pipe

Abstract

The utility model relates to a conveying pipe connecting technical field especially relates to a kind of connecting structure of flexible composite high-pressure conveying pipe, including pipeline one and pipeline two, the end of pipeline one is equipped with flange interface one, the end of pipeline two is equipped with flange interface two, flange interface one and flange interface two mutually adhere to set, the inside of flange interface one and the inside of flange interface two are all penetrated and distributed with several bolts, the other end of bolt is equipped with nut with thread, the surface of flange interface two is tightly set on one side of nut. The scheme is formed double protection by the bolt fastening of flange interface and the wrapping type sealing of sealing sleeve, sealing sleeve adopts half splicing design, and embedded water-swelling rubber sealing ring, when pipeline conveys liquid, sealing ring water-swelling can automatically fill fine gap, realize dynamic sealing, and the tight cooperation of annular sealing groove and flange interface further prevents medium leakage.

Description

Technical Field

[0001] This utility model relates to the field of conveying pipe connection technology, and in particular to a connection structure for a flexible composite high-pressure conveying pipe. Background Technology

[0002] Flexible composite high-pressure transmission pipes are high-performance pipeline systems widely used in petroleum, natural gas, chemical, and marine engineering fields. They are composed of multiple layers of composite materials, including an inner corrosion-resistant material, a middle reinforcing layer, and an outer protective layer. This structural design gives flexible composite high-pressure transmission pipes excellent pressure resistance, corrosion resistance, and high-temperature resistance.

[0003] The main advantages of flexible composite high-pressure conveying pipes lie in their flexibility and adaptability. Due to their flexibility, they can be laid in complex terrains and environments, reducing dependence on terrain and construction difficulty. According to the authorized publication number "CN219639724U", a connection structure for a flexible composite high-pressure conveying pipe is disclosed, including a main body and a connection mechanism. The connection mechanism is located on the right side of the main body. The main body includes a first flexible composite high-pressure conveying pipe and a second flexible composite high-pressure conveying pipe. The second flexible composite high-pressure conveying pipe is movably installed on the right side of the first flexible composite high-pressure conveying pipe, and the inlet is fixedly located on the left side of the second flexible composite high-pressure conveying pipe. This connection structure, by installing flexible connecting components, facilitates the connection of the flexible composite high-pressure conveying pipes via flexible hoses during use. When connected, the flexible hoses greatly reduce the impact on the pipe walls during liquid transport, reducing vibration and enhancing the stability of the connection, thus improving practicality in use.

[0004] Currently, in some production areas, flexible pipelines are generally used for the transportation of gases or liquids to facilitate pipeline layout. Flexible pipelines have good bending properties and can be distributed around locations where it is inconvenient to pass in a straight line. However, since some gas or liquid transportation processes are under high pressure, if the connection is made solely by flanges at the ends of the pipeline, long-term use under the influence of high-pressure transportation will not only easily lead to leakage at the connection, but also to breakage and disconnection. If the transported gas or liquid is harmful to human health and the surrounding environment, it may also cause safety accidents. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing a connection structure for a flexible composite high-pressure transmission pipe.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a connection structure for a flexible composite high-pressure conveying pipe, comprising a pipe one and a pipe two, wherein a flange interface one is installed at the end of the pipe one, and a flange interface two is installed at the end of the pipe two, the flange interface one and the flange interface two are fitted together, and a number of bolts are distributed through the interior of the flange interface one and the interior of the flange interface two, and a nut is threaded on the other end of the bolt, and one side of the nut is tightly fitted to the surface of the flange interface two.

[0007] The surfaces of flange interface one and flange interface two are covered with sealing sleeves. The inner walls of the sealing sleeves have annular protrusions on both sides. The sealing sleeves are half-joint interfaces, consisting of an upper half and a lower half. The inner walls of the sealing sleeves are provided with symmetrically distributed sealing grooves. The sealing grooves are annular structures and are half-joints. The inner sides of the sealing grooves are filled with sealing rings. The sealing rings distributed along both sides are respectively fitted and tightly wrapped with the corresponding flange interfaces. The sealing rings are made of water-swellable rubber material.

[0008] In detail, the upper half of the set has extension plates symmetrically installed on both sides of its outer wall, and the lower half of the set has extension plates symmetrically installed on both sides of its outer wall. The extension plates 1 and 2, which are located on one side, are positioned correspondingly.

[0009] In detail, a threaded post is fixedly installed on the surface of the second extension plate, and an inner sleeve is fixed on the surface of the first extension plate, with the threaded post and the inner sleeve slidingly penetrating each other.

[0010] In detail, the end of the threaded column is threaded with a threaded cap, and one side of the threaded cap is set to abut against the end face of the inner sleeve.

[0011] In detail, both the surface of pipe one and the surface of pipe two are covered with a semi-circular seat, and the inner side of the semi-circular seat is filled with an adhesive layer made of epoxy resin material. The adhesive layer is bonded and fixed to the corresponding pipe.

[0012] In detail, a positioning seat is fixedly installed in the middle of the semi-circular seat, a positioning block is inserted inside the positioning seat, and the ends of the positioning blocks distributed on both sides are jointly installed with the same connecting plate.

[0013] In detail, the surface of the alignment block is provided with a positioning groove, a positioning pin is slidably sleeved inside the positioning groove, and a spring is provided inside the positioning groove. The two ends of the spring are fixedly installed to the inner wall of the positioning groove and the surface of the positioning pin, respectively.

[0014] In detail, the surface of the positioning seat is provided with a positioning hole that penetrates through it, and the surface of the positioning pin slides through the interior of the positioning hole.

[0015] The design scheme proposed in this utility model has the following beneficial effects in application:

[0016] 1. This solution provides double protection through the bolt fastening of the flange interface and the wrap-around seal of the sealing sleeve. The sealing sleeve adopts a half-splitting design and has an embedded water-swellable rubber sealing ring. When the pipeline is transporting liquid, the sealing ring expands when it comes into contact with water and can automatically fill the tiny gaps to achieve dynamic sealing. The tight fit between the annular sealing groove and the flange interface further prevents the media from leaking out.

[0017] 2. As described in 1, the combination design of the semi-circular seat and the connecting plate forms a three-dimensional reinforced structure. The epoxy resin adhesive layer provides basic bonding force, while the mechanical interlocking structure between the seat and the connecting plate disperses the axial stress of the pipeline. The positioning pin automatically engages with the positioning hole under the action of the spring, achieving rapid locking and making the two semi-circular seats form an integral pressure-bearing structure. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall internal structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the present invention from the front.

[0021] Figure 4 This is an enlarged schematic diagram of point A in this utility model;

[0022] Figure 5 This is a disassembly diagram of the alignment block, alignment seat, and locking pin of this utility model.

[0023] In the diagram: 1. Pipe 1; 11. Flange Interface 1; 12. Pipe 2; 13. Flange Interface 2; 14. Bolt; 15. Nut; 16. Sealing Sleeve; 17. Sealing Groove; 18. Sealing Ring; 2. Extension Plate 1; 21. Extension Plate 2; 22. Threaded Post; 23. Internal Sleeve; 24. Threaded Cap; 3. Semicircular Seat; 31. Adhesive Layer; 32. Alignment Seat; 33. Alignment Block; 34. Connecting Plate; 3001. Positioning Groove; 3002. Positioning Pin; 3003. Spring; 3004. Positioning Hole. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Example 1

[0026] Reference Figures 1-5A connection structure for a flexible composite high-pressure transmission pipe includes a pipe 1 and a pipe 2 12. A flange interface 11 is installed at the end of the pipe 1, and a flange interface 2 13 is installed at the end of the pipe 2 12. The flange interface 11 and the flange interface 2 13 are fitted together. Several bolts 14 are distributed through the interior of both the flange interface 11 and the flange interface 2 13. Nuts 15 are threaded onto the other end of the bolts 14. One side of the nut 15 is tightly fitted to the surface of the flange interface 2 13. During initial installation, the two pipes can be initially positioned by closing the two flange interfaces. Then, the two flange interfaces can be fixed by installing the bolts 14 and nuts 15 distributed in multiple positions.

[0027] The surfaces of flange interface 11 and flange interface 13 are covered with sealing sleeves 16. The inner walls of the sealing sleeves 16 have annular protrusions on both sides. The sealing sleeves 16 are a half-sleeve joint, consisting of an upper half and a lower half. The inner walls of the sealing sleeves 16 are provided with symmetrically distributed sealing grooves 17. The sealing grooves 17 are annular structures and are half-sleeve joints. The inner side of the sealing grooves 17 is filled with sealing rings 18. The sealing rings 18 distributed on both sides are respectively fitted and tightly wrapped with the corresponding flange interfaces. The sealing rings 18 are made of water-swellable rubber material. Since the sealing grooves 17 are located on the inner walls of the sealing sleeves 16, they are also half-sleeve joints to ensure a proper fit between the structures. The sealing rings 18 are inserted into the sealing grooves 17, and through mutual compaction, leakage can be reduced.

[0028] It should be further noted that extension plates 1 and 2 are symmetrically installed on both sides of the outer wall of the upper half, and extension plates 2 and 21 are symmetrically installed on both sides of the outer wall of the lower half. The extension plates 1 and 2 and 21 located on one side are positioned correspondingly, and the specifications of extension plates 1 and 2 are the same as those of extension plates 2 and 21.

[0029] It should be further explained that a threaded post 22 is fixedly installed on the surface of extension plate 21, and an inner sleeve 23 is fixedly installed on the surface of extension plate 2. The threaded post 22 and the inner sleeve 23 are slidably connected. Through the connection between the threaded post 22 and the inner sleeve 23, the upper and lower halves can be quickly positioned and connected.

[0030] It should be further explained that the end of the threaded column 22 is threaded with a threaded cap 24. One side of the threaded cap 24 is set to abut against the end face of the inner sleeve 23. When it is necessary to connect the sealing sleeve 16 to the flange interface 11 and the flange interface 13, the half-splittered sealing sleeve 16 is closed with the upper and lower halves to achieve installation with the two flange interfaces. At this time, the threaded column 22 and the inner sleeve 23 are connected through, and the upper and lower halves can be spliced ​​and fixed by the threaded cap 24 and the threaded column 22 being threaded together.

[0031] It should be further explained that the surfaces of pipe 1 and pipe 2 are both covered with a semi-circular seat 3. The inner side of the semi-circular seat 3 is filled with an adhesive layer 31, which is made of epoxy resin. The adhesive layer 31 is bonded and fixed to the corresponding pipe. The semi-circular seat 3 can be bonded to the surface of the flexible pipe through the adhesive layer 31. With the help of the connecting plate 34, pipe 1 and pipe 2 can be reinforced and connected to avoid leakage or collapse at the connection point of the two pipes under high pressure of gas or liquid transportation.

[0032] It should be further explained that a positioning seat 32 is fixedly installed in the middle of the semicircular seat 3, and a positioning block 33 is inserted inside the positioning seat 32. The ends of the positioning blocks 33 distributed on both sides are jointly installed with the same connecting plate 34. The positioning blocks 33 and the positioning seat 32 are connected to each other, which can ensure that the connecting plate 34 can connect the two semicircular seats 3.

[0033] It should be further explained that a positioning groove 3001 is provided on the surface of the positioning block 33, and a positioning pin 3002 is slidably sleeved inside the positioning groove 3001. A spring 3003 is provided inside the positioning groove 3001, and the two ends of the spring 3003 are fixedly installed to the inner wall of the positioning groove 3001 and the surface of the positioning pin 3002, respectively. The spring 3003 can ensure the stability of the positioning pin 3002 in its extension and retraction relative to the positioning groove 3001.

[0034] It should be further explained that the surface of the positioning seat 32 is provided with a positioning hole 3004 that penetrates through it. The surface of the positioning pin 3002 slides through the interior of the positioning hole 3004. When the connecting plate 34 needs to be installed, the positioning block 33 is inserted and connected to the positioning seat 32, so that the connecting plate 34 can connect the two semi-circular seats 3. When the position of the positioning pin 3002 corresponds to the position of the positioning hole 3004, the spring 3003 resets the positioning pin 3002 and the positioning hole 3004 to pass through, so that the connecting plate 34 and the two semi-circular seats 3 can be fixed.

[0035] In practice

[0036] In this design, flange interface 11 and flange interface 2 13 are initially fixed by bolts 14 and nuts 15. During installation, the two flange interfaces are first aligned and fitted together. Bolts 14 pass through the reserved holes on both and are tightened with nuts 15 to form a rigid connection between the flange interfaces. This structure can withstand the fluid pressure in the high-pressure conveying pipe and prevent the interface from separating due to pressure. The sealing sleeve 16 wraps around the outside of the flange interface, and the annular protrusion structure on its inner wall fits tightly with the surface of the flange interface to further enhance the sealing performance. The water-swellable rubber sealing ring 18 filled in the sealing groove 17 will expand when it comes into contact with water, further filling any possible tiny gaps, thereby effectively preventing leakage. This double sealing design, with mechanical compression and material self-expansion, ensures the reliability of the connection under high pressure.

[0037] The sealing sleeve 16 adopts a half-splitting design, consisting of an upper half and a lower half, which facilitates quick installation and disassembly. The upper half and the lower half are aligned by extension plate 1 2 and extension plate 21. The threaded post 22 is inserted into the inner sleeve 23 for initial positioning. Subsequently, the threaded cap 24 is tightened on the threaded post 22 to press the inner sleeve 23, making the two halves of the sealing sleeve tightly closed. This design not only simplifies the installation process but also ensures uniform compression between the sealing sleeve and the flange interface. The half-splitting structure of the sealing groove 17 and the filling method of the sealing ring 18 further ensure the sealing performance and avoid leakage caused by splicing gaps. In addition, the split design facilitates quick disassembly during maintenance without removing the entire flange connection structure, thus improving maintenance efficiency.

[0038] The semi-circular seat 3 is bonded to the pipe surface through the adhesive layer 31, providing additional support and reinforcement. The matching design of the positioning seat 32 and the positioning block 33 allows the connecting plate 34 to connect the two semi-circular seats 3 into a whole. The positioning pin 3002 automatically springs into the positioning hole 3004 under the action of the spring 3003, achieving quick locking and preventing the connecting plate 34 from loosening due to vibration or pressure. This structure disperses the stress at the pipe connection and prevents deformation or cracking at the interface during high-pressure transmission. The adhesive performance of the epoxy resin adhesive layer 31 further enhances the bonding strength between the semi-circular seat 3 and the pipe, ensuring the long-term stability of the reinforced structure. The overall design not only improves the pressure resistance of the pipe but also facilitates disassembly and maintenance, making it suitable for reliable connection of high-pressure flexible pipes.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A connection structure for a flexible composite high-pressure transmission pipe, comprising pipe one (1) and pipe two (12), characterized in that: The end of the first pipe (1) is equipped with a flange interface 1 (11), and the end of the second pipe (12) is equipped with a flange interface 2 (13). The flange interface 1 (11) and the flange interface 2 (13) are fitted together. Several bolts (14) are distributed through the inside of the flange interface 1 (11) and the inside of the flange interface 2 (13). The other end of the bolt (14) is threaded with a nut (15). One side of the nut (15) is tightly fitted to the surface of the flange interface 2 (13). The surfaces of flange interface one (11) and flange interface two (13) are covered with sealing sleeves (16). The inner walls of the sealing sleeves (16) have annular protrusions on both sides. The sealing sleeves (16) are half-splitting interfaces, divided into upper and lower half-splitting. The inner walls of the sealing sleeves (16) are provided with symmetrically distributed sealing grooves (17). The sealing grooves (17) are annular structures and are half-splitting. The inner side of the sealing grooves (17) is filled with sealing rings (18). The sealing rings (18) distributed on both sides are respectively fitted and tightly wrapped with the corresponding flange interfaces. The sealing rings (18) are made of water-swellable rubber material.

2. The connection structure of a flexible composite high-pressure transmission pipe according to claim 1, characterized in that: The upper half of the set has extension plates 1 (2) symmetrically installed on both sides of the outer wall, and extension plates 2 (21) symmetrically installed on both sides of the outer wall of the lower half of the set. The extension plates 1 (2) and 2 (21) located on one side are positioned correspondingly.

3. The connection structure of a flexible composite high-pressure transmission pipe according to claim 2, characterized in that: The surface of the second extension plate (21) is fixedly equipped with a threaded post (22), and the surface of the first extension plate (2) is fixedly equipped with an inner sleeve (23). The threaded post (22) and the inner sleeve (23) are slidably connected.

4. The connection structure of a flexible composite high-pressure transmission pipe according to claim 3, characterized in that: The end of the threaded column (22) is threaded with a threaded cap (24), and one side of the threaded cap (24) is in contact with the end face of the inner sleeve (23).

5. The connection structure of a flexible composite high-pressure transmission pipe according to claim 4, characterized in that: The surfaces of pipe one (1) and pipe two (12) are covered with a semi-circular seat (3). The inner side of the semi-circular seat (3) is filled with an adhesive layer (31). The adhesive layer (31) is made of epoxy resin adhesive material and is bonded and fixed to the corresponding pipe.

6. The connection structure of a flexible composite high-pressure transmission pipe according to claim 5, characterized in that: A positioning seat (32) is fixedly installed in the middle of the semicircular seat (3). A positioning block (33) is inserted inside the positioning seat (32). The ends of the positioning blocks (33) distributed on both sides are jointly installed with the same connecting plate (34).

7. The connection structure of a flexible composite high-pressure transmission pipe according to claim 6, characterized in that: The positioning block (33) has a positioning groove (3001) on its surface. A positioning pin (3002) is slidably sleeved inside the positioning groove (3001). A spring (3003) is installed inside the positioning groove (3001). The two ends of the spring (3003) are fixedly installed to the inner wall of the positioning groove (3001) and the surface of the positioning pin (3002), respectively.

8. The connection structure of a flexible composite high-pressure transmission pipe according to claim 7, characterized in that: The surface of the positioning seat (32) is provided with a positioning hole (3004) that penetrates its interior, and the surface of the positioning pin (3002) slides through the interior of the positioning hole (3004).

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