Connecting structure of high-pressure connector for RTP pipe

Abstract

The utility model discloses a connecting structure of a high-pressure joint for an RTP pipe, and relates to the technical field of composite pipes, the connecting structure comprises two groups of RTP pipe bodies with the same pipe diameter, one end of each group of RTP pipe body is provided with a butt joint pipe head, and the butt joint pipe heads and the RTP pipe bodies are integrally formed; the inner diameter and the outer diameter of the butt-joint pipe sleeve are the same as those of the butt-joint pipe head, and the connecting pipe sleeve and the threaded pipe sleeve are arranged on the two sides of the butt-joint pipe sleeve. A connecting groove and a threaded groove which are matched with the connecting pipe sleeve and the threaded pipe sleeve are formed in the two opposite ends of the two butt joint pipe heads correspondingly. The connecting pipe sleeve is rotationally arranged in the connecting groove, and an inner sealing gasket is arranged at the end, located in the connecting groove, of the connecting pipe sleeve. The threaded pipe sleeve is installed in the threaded groove through threads. The connecting position is not affected by the pressure of fluid media in the pipeline, the capacity that the connecting position can bear pressure inside and outside the pipeline and tensile load is guaranteed, sealing is effective, and the pressure resistance of RTP pipe connection can be improved.

Description

Technical Field

[0001] This utility model relates to the field of composite pipe technology, specifically to a connection structure for a high-pressure connector for RTP pipes. Background Technology

[0002] RTP pipe, or flexible reinforced thermoplastic composite pipe, is a type of high-pressure plastic composite pipe. RTP pipe typically consists of three layers: the inner and outer layers are made of PE80 or PE100 grade or higher materials, with the outer layer available in white (for surface laying with UV protection) or black (for underground laying); the middle layer is a reinforcing strip composed of reinforcing materials such as aramid fiber, polyester fiber, or glass fiber. RTP pipe uses high-density polyethylene (HDPE) grade 80 or higher plastic, high-strength fibers, or steel wire rope as the main raw materials, and is produced through processes such as extrusion, molding, winding, outer coating, and coiling to create high-pressure flexible pipes with lengths reaching thousands of meters. By using different reinforcing layer materials and outer coating materials, various pressure ratings and performance characteristics of RTP pipes can be obtained.

[0003] The existing RTP pipes mainly use crimp fittings and fusion fittings for connection, with crimp fittings being the primary method in high-pressure applications. However, the fusion fitting, which uses electrofusion welding to join RTP pipes together, does not have a particularly strong ability to withstand internal and external pressures and tensile loads at the joint (e.g., patent number CN107228248A, "An RTP Pipe Fitting Structure and its Connection Method"). Crimping fittings, on the other hand, reduce the pipe's inner diameter in practical use, and because they use a metal toothed clamping structure, they can cause permanent damage to the RTP pipe body during assembly. Furthermore, for tensile RTP pipe bodies, since the tensile fibers are not connected together, the axial tensile force cannot be fully transmitted by the clamping of the fitting against the outer wall alone when using crimp fittings. Additionally, crimp fittings require flange sealing rings for connection, making on-site construction cumbersome. Therefore, there is significant room for improvement in the existing technology. Utility Model Content

[0004] The purpose of this utility model is to provide a connection structure for a high-pressure connector for RTP pipes, which ensures that the connection is not affected by the pressure of the fluid medium inside the pipe, and guarantees that the connection can withstand the pressure and tensile load inside and outside the pipe, with effective sealing and improved pressure resistance of RTP pipe connections.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a connection structure for a high-pressure connector for RTP pipes, comprising two sets of RTP pipe bodies with the same diameter, each set of RTP pipe bodies having a connecting pipe head at one end, the connecting pipe head being integrally formed with the RTP pipe body; further comprising a connecting sleeve with the same inner and outer diameters as the connecting pipe head, a connecting sleeve and a threaded sleeve disposed on both sides of the connecting sleeve; the two opposite ends of the two connecting pipe heads are respectively provided with a connecting groove and a threaded groove adapted to the connecting sleeve and the threaded sleeve; the connecting sleeve is rotatably disposed within the connecting groove, and one end of the connecting sleeve located inside the connecting groove is provided with a... The inner sealing gasket; the threaded sleeve is installed in the threaded groove by threads; the connecting sleeve is provided with an outer sealing gasket that fits tightly to both sides facing the two connecting heads; positioning sleeves are integrally formed on the outer circumference of the two connecting heads and the connecting sleeve, and ferrules are symmetrically fitted on all positioning sleeves; several lugs are provided at equal distances at both ends of the two ferrules on opposite sides, and two adjacent lugs on the two ferrules are detachably connected by bolts; several shafts with a limiting block at one end are arranged parallel to each other along the axial direction on the opposite side of the two ferrules, and one end of all shafts passes through the ferrules and all positioning sleeves and is provided with a nut.

[0006] To enhance the connection stability between the connector and the coupling, a preferred connection structure for a high-pressure connector for RTP pipes according to this utility model is provided with rubber pads on the inner walls of the two clamps.

[0007] To improve the sealing performance between the connector and the coupling, as a preferred connection structure for a high-pressure connector for RTP pipes according to this utility model, the outer sealing gasket is provided with two annular sealing protrusions on the side facing the coupling, and the coupling is provided with a sealing groove that matches the sealing protrusions, with the sealing protrusions placed in the sealing groove.

[0008] In order to ensure stable operation of the medium inside the RTP pipe, as a preferred connection structure for a high-pressure connector for RTP pipe according to this utility model, a buffer sleeve integrally formed with the inner wall of the connecting pipe sleeve is provided on the inner wall of the junction of the two connecting pipes, and the inner wall of the buffer sleeve has an inwardly convex curved surface structure.

[0009] In order to facilitate the improvement of the stability of fluid medium flow within the RTP pipe, the preferred connection structure for a high-pressure connector for an RTP pipe according to this utility model is as follows: the inner diameter of the connector is the same as the inner diameter of the RTP pipe, the outer diameter of the connector is larger than the outer diameter of the RTP pipe, and the outer diameter of the connector gradually decreases at the end closest to the RTP pipe.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] This invention connects the two RTP pipe bodies by rotating the connecting sleeve on one side of the connecting sleeve into the connecting groove of one of the connecting heads, and rotating the connecting sleeve to thread the threaded sleeve into the threaded groove of the other connecting head. The connection is enhanced by an inner sealing washer, an outer sealing washer, and a sealing ring. A retaining sleeve is fitted onto a positioning sleeve, and one end of the shaft passes through the retaining sleeve and all positioning sleeves, with a nut provided. This facilitates a tighter and more stable connection between the two connecting heads and the connectors. The connection is unaffected by the pressure of the fluid medium inside the pipe, ensuring the connection can withstand internal and external pressures and tensile loads. Furthermore, this connection mechanism is rationally installed, allows for disassembly, provides effective sealing, and improves the compressive strength of the RTP pipe connection. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 for Figure 1 A schematic diagram of the AA-direction structure;

[0014] Figure 3 This is a schematic diagram of the structure of the shaft and positioning sleeve of this utility model;

[0015] Figure 4 This is a schematic diagram of the structure of the card sleeve and rubber pad of this utility model.

[0016] In the diagram: 1. RTP pipe body; 2. Connecting pipe end; 3. Connecting pipe sleeve; 4. Connecting pipe sleeve; 5. Threaded pipe sleeve; 6. Connecting groove; 7. Threaded groove; 8. Inner sealing gasket; 9. Outer sealing gasket; 10. Positioning sleeve; 11. Compression sleeve; 12. Ear seat; 13. Shaft; 14. Rubber gasket; 15. Sealing convex ring; 16. Sealing groove; 17. Buffer sleeve. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0018] Please see Figures 1 to 4A connection structure for a high-pressure connector for RTP pipes includes two sets of RTP pipe bodies 1 with the same diameter. Each set of RTP pipe bodies 1 has a connecting head 2 at one end, which is integrally formed with the RTP pipe body 1. It also includes a connecting sleeve 3 with the same inner and outer diameters as the connecting head 2, a connecting sleeve 4 on both sides of the connecting sleeve 3, and a threaded sleeve 5. The two opposite ends of the two connecting heads 2 are respectively provided with a connecting groove 6 and a threaded groove 7 that are adapted to the connecting sleeve 4 and the threaded sleeve 5. The connecting sleeve 4 is rotatably disposed within the connecting groove 6, and an inner sealing gasket 8 is provided at one end of the connecting sleeve 4 inside the connecting groove 6. The threaded sleeve 5 is connected by a threaded... The thread is installed in the threaded groove 7; the connecting sleeve 3 is provided with an outer sealing gasket 9 on both sides facing the two connecting heads 2; the two connecting heads 2 and the connecting sleeve 3 are integrally formed with positioning sleeves 10, and ferrules 11 are symmetrically fitted on all positioning sleeves 10; several lugs 12 are provided at equal distances on both sides of the two ferrules 11, and two adjacent lugs 12 on the two ferrules 11 are detachably connected by bolts; several shafts 13 with a limiting block at one end are arranged parallel to each other along the axial direction on the opposite side of the two ferrules 11, and one end of all shafts 13 passes through the ferrules 11 and all positioning sleeves 10 and is provided with a nut.

[0019] In this embodiment: the connecting sleeve 4 on one side of the connecting sleeve 3 is rotatably disposed within the connecting groove 6 of one of the connecting heads 2, and the connecting sleeve 4 cannot be removed from the connecting groove 6; by rotating the connecting sleeve 3, the threaded sleeve 5 is threadedly installed into the threaded groove 7 on the other connecting head 2, so that the connecting heads 2 on the two RTP pipe bodies 1 can be connected. The inner sealing gasket 8 enhances the sealing between the connecting sleeve 4 and the connecting groove 6 to prevent overflow; and the outer sealing gasket 9 improves the connection sealing between the connecting sleeve 3 and the two connecting heads 2. Two ferrules 11 are respectively fitted onto the positioning sleeves 10, and the two ferrules 11 are connected with bolts to form a positioning sleeve 10. The positioning sleeve 10 restricts and positions the ferrules 11 on the two connecting pipe heads 2 and the connecting pipe sleeves 3 respectively, so as to prevent the connecting pipe heads 2 on the two RTP pipe bodies 1 from becoming loose. One end of the shaft 13 passes through the ferrules 11 and all the positioning sleeves 10 and is provided with a nut, which can easily strengthen the tightness and stability of the connection between the two connecting pipe heads 2 and the connecting parts, so that the connection is not affected by the pressure of the fluid medium inside the pipeline, and ensures that the connection can withstand the pressure and tensile load inside and outside the pipeline.

[0020] As a technical optimization of this utility model, rubber pads 14 are provided on the inner walls of the two card sleeves 11.

[0021] In this embodiment, the rubber pad 14 further enhances the tightness between the ferrule 11 and the connector 2, connector sleeve 3 and positioning sleeve 10.

[0022] As a technical optimization of this utility model, the outer sealing gasket 9 is provided with two ring-shaped sealing protrusions 15 on the side facing the connector 2, and the connector 2 is provided with a sealing groove 16 that matches the sealing protrusions 15, with the sealing protrusions 15 placed in the sealing groove 16.

[0023] In this embodiment, the sealing convex ring 15 is placed in the sealing groove 16, which can fill the tiny gap between the connector 2 and the outer sealing gasket 9, effectively preventing liquid intrusion and ensuring sealing.

[0024] As a technical optimization of this utility model, a buffer sleeve 17 integrally formed with the inner wall of the connecting sleeve 3 is provided on the inner wall of the junction of the two connecting pipe heads 2. The inner wall of the buffer sleeve 17 has an inwardly convex curved surface structure.

[0025] In this embodiment, the inner wall of the buffer sleeve 17 is curved, which further reduces the impact of water hammer force on the connector 2 and the risk of leakage and detachment. The buffer sleeve 17 can decompose the water hammer force of the internal fluid medium on the connection of the connector 2, so that the liquid can smoothly transition into the hose connector, avoiding the connection from loosening due to the pressure of the internal liquid on the connection, and ensuring stable operation.

[0026] As a technical optimization of this utility model, the inner diameter of the connector 2 is the same as the inner diameter of the RTP tube 1, the outer diameter of the connector 2 is larger than the outer diameter of the RTP tube 1, and the outer diameter of the connector 2 gradually decreases at the end closest to the RTP tube 1.

[0027] In this embodiment, the inner diameter of the connector 2 is the same as the inner diameter of the RTP tube 1, which makes it easier to improve the stability of the fluid medium flow inside the RTP tube 1.

[0028] Working principle and usage process of this utility model:

[0029] The connecting sleeve 4 on one side of the connecting sleeve 3 is rotatably installed in the connecting groove 6 of one of the connecting heads 2, and the connecting sleeve 4 cannot be removed from the connecting groove 6; by rotating the connecting sleeve 3, the threaded sleeve 5 is threaded into the threaded groove 7 on the other connecting head 2, so that the connecting heads 2 on the two RTP pipe bodies 1 can be connected; the inner sealing gasket 8 enhances the sealing between the connecting sleeve 4 and the connecting groove 6 to prevent overflow; and the outer sealing gasket 9 improves the connection sealing between the connecting sleeve 3 and the two connecting heads 2; the two clamping sleeves 11 are respectively fitted onto the positioning... The sleeve 10 is attached to the pipe and two clamping sleeves 11 are connected by bolts to form a positioning sleeve 10. The positioning sleeve 10 restricts and positions the clamping sleeves 11 on the two connecting pipe heads 2 and the connecting pipe sleeve 3 respectively, so as to prevent the connecting pipe heads 2 on the two RTP pipe bodies 1 from becoming loose. One end of the shaft 13 passes through the clamping sleeve 11 and all the positioning sleeves 10 and is provided with a nut, which can easily strengthen the tightness and stability of the connection between the two connecting pipe heads 2 and the connecting parts, so that the connection will not be affected by the pressure of the fluid medium inside the pipeline, and ensure that the connection can withstand the pressure and tensile load inside and outside the pipeline.

[0030] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A connection structure for a high-pressure connector for RTP pipes, comprising two sets of RTP pipe bodies (1) of the same diameter, wherein one end of each set of RTP pipe bodies (1) is provided with a connecting pipe head (2), and the connecting pipe head (2) is integrally formed with the RTP pipe body (1); characterized in that: It also includes a connecting sleeve (3) with the same inner and outer diameters as the connecting head (2), a connecting sleeve (4) and a threaded sleeve (5) disposed on both sides of the connecting sleeve (3); the two ends opposite to the two connecting heads (2) are respectively provided with a connecting groove (6) and a threaded groove (7) adapted to the connecting sleeve (4) and the threaded sleeve (5); the connecting sleeve (4) is rotatably disposed in the connecting groove (6), and an inner sealing gasket (8) is provided at one end of the connecting sleeve (4) located inside the connecting groove (6); the threaded sleeve (5) is installed in the threaded groove (7) by threads; the connecting sleeve (3) is provided with a connecting groove (6) on both sides facing the two connecting heads (2). A tightly fitting outer sealing gasket (9); a positioning sleeve (10) is integrally formed on the outer circumferential wall of both connecting pipe heads (2) and connecting pipe sleeves (3), and a retaining sleeve (11) is symmetrically fitted on all the positioning sleeves (10); several ear seats (12) are equally spaced at both ends of the two retaining sleeves (11), and two adjacent ear seats (12) on the two retaining sleeves (11) are detachably connected by bolts; several shafts (13) with a limiting block at one end are arranged parallel to each other along the axial direction on the opposite side of the two retaining sleeves (11), and one end of all the shafts (13) passes through the retaining sleeves (11) and all the positioning sleeves (10) and is provided with a nut.

2. The connection structure of a high-pressure connector for an RTP pipe according to claim 1, characterized in that: Rubber pads (14) are provided on the inner walls of the two sleeves (11).

3. The connection structure of a high-pressure connector for an RTP pipe according to claim 1, characterized in that: The outer sealing gasket (9) has two ring-shaped sealing protrusions (15) on the side facing the connector (2). The connector (2) has a sealing groove (16) that matches the sealing protrusions (15). The sealing protrusions (15) are placed in the sealing groove (16).

4. The connection structure of a high-pressure connector for an RTP pipe according to claim 1, characterized in that: A buffer sleeve (17) integrally formed with the inner wall of the connecting sleeve (3) is provided on the inner wall of the two connecting pipe heads (2). The inner wall of the buffer sleeve (17) has an inwardly convex curved surface structure.

5. The connection structure of a high-pressure connector for an RTP pipe according to claim 1, characterized in that: The inner diameter of the connector (2) is the same as the inner diameter of the RTP tube (1), the outer diameter of the connector (2) is larger than the outer diameter of the RTP tube (1), and the outer diameter of the connector (2) gradually decreases at the end of the connector (2) closest to the RTP tube (1).

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