Non-metal flexible pipeline joint

Abstract

The invention discloses a non-metal flexible pipeline joint which comprises pipeline butt joint assemblies and a middle pipe section, the two ends of the middle pipe section are connected with the pipeline butt joint assemblies correspondingly, each pipeline butt joint assembly comprises a flexible pipeline, a connector and a fastening assembly, the two ends of each flexible pipeline are fixedly provided with connecting pipes correspondingly, one connecting pipe is connected with the middle pipe section, and the other connecting pipe is connected with the connector. The end, away from the flexible pipeline, of the other connecting pipe is detachably and fixedly connected with a connector, a sleeve is installed on the connector, a cavity is formed between the connector and the sleeve and used for being connected with a conveying pipeline to be in butt joint, a fastening assembly is installed on the sleeve, and the fastening assembly can generate radial extrusion force on the conveying pipeline to achieve fastening. The fastening assembly designed by the invention can generate radial extrusion force on the conveying pipeline in the cavity so as to fasten the conveying pipeline, so that the firmness of connection between the conveying pipeline and the connector is improved, and the problem of leakage caused by falling off is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of oil pipeline connection, in particular to a non-metallic flexible pipeline joint. Background Art

[0002] Non-metallic pipelines have become the primary means of transporting both subsea and surface oil and gas resources. Due to their excellent corrosion resistance, low hydraulic friction, flexibility, minimal joints, and quick installation, they have been widely used in surface oil and gas field development projects in recent years. They have played a significant role in mitigating pipeline corrosion, reducing maintenance costs, and saving investment in surface construction projects. Pipeline joints, a crucial component of non-metallic pipelines, are susceptible to damage and leakage, leading to serious oil and gas leaks, fires, explosions, and other dangerous incidents. These risks pose significant risks to human life and the ecological environment, while also resulting in significant economic losses.

[0003] However, after the existing pipe joint is butted against the delivery pipe, the butt joint is easily detached during use, causing leakage.

[0004] Therefore, a new non-metallic flexible pipe joint is urgently needed to solve the above technical problems. Summary of the Invention

[0005] The present invention aims to solve the above technical problem, that is, to solve the problem that after the existing pipe joint is connected to the transmission pipeline, the connecting part is easy to fall off during use and cause leakage.

[0006] To this end, the present invention provides a non-metallic flexible pipe joint, comprising a pipe docking assembly and an intermediate pipe section, wherein both ends of the intermediate pipe section are respectively connected to the pipe docking assembly, the pipe docking assembly comprises a flexible pipe, a connecting head and a fastening assembly, and both ends of the flexible pipe are respectively fixed with connecting pipes, one of which is connected to the intermediate pipe section, and the other connecting pipe is detachably fixedly connected to the connecting head at one end away from the flexible pipe, a sleeve is installed on the connecting head, a cavity is formed between the connecting head and the sleeve for connecting the conveying pipe to be docked, a fastening assembly is installed on the sleeve, and the fastening assembly is configured to generate radial extrusion force on the conveying pipe connected in the cavity to achieve fastening.

[0007] In a specific embodiment of the above-mentioned non-metallic flexible pipe joint, a wear-resistant layer is provided on the outer wall of the flexible pipe, an anti-corrosion layer is provided on the inner wall of the flexible pipe, the flexible pipe is a corrugated pipe, and a metal clamping ring is clamped in the corrugated groove on the flexible pipe.

[0008] In a specific embodiment of the above non-metallic flexible pipe joint, a limiting ring is fixed on the outer wall of the connector, an annular groove is formed on the limiting ring, and one end of the sleeve is clamped in the annular groove to be installed on the connector.

[0009] In a specific embodiment of the above-mentioned non-metallic flexible pipe joint, a plurality of annular grooves arranged along the axis of the connecting pipe are provided on the inner wall of one end of the other connecting pipe away from the flexible pipe, and an annular protrusion corresponding to the annular groove is provided on the outer wall of the connecting head on one side of the limiting ring. When the end of the connecting head with the annular protrusion is inserted into the connecting pipe, the annular protrusion is inserted into the annular groove, and the connecting pipe is provided with a first tightening hoop through the outer side to achieve a detachable fixed connection with the connecting head.

[0010] In a specific embodiment of the above non-metallic flexible pipe joint, a plurality of thread teeth and sealing rings arranged along the axis of the connector are provided on the outer wall of the connector on the other side of the limiting ring, and the sealing rings are arranged at intervals from the thread teeth.

[0011] In a specific embodiment of the above-mentioned non-metallic flexible pipe joint, the fastening assembly includes a support frame, a pull rod and a push block. The support frame is fixed on the outer wall of the sleeve. The support frame is provided with a guide hole that passes through the sleeve. The center line of the guide hole is perpendicular to the center line of the sleeve. The pull rod is inserted into the guide hole. The top end of the pull rod is located on the outside of the support frame and is fixed with a handle. The bottom end of the pull rod is fixed with the push block. The end of the push block facing away from the pull rod is fixed with a clamping tooth. A spring is provided on the pull rod. The pull rod drives the push block to generate radial extrusion force on the conveying pipe inserted between the sleeve and the connector under the action of the spring force.

[0012] In a specific embodiment of the above non-metallic flexible pipe joint, the middle pipe section includes a flow sensor and a sealing joint. Both end interfaces of the flow sensor are connected to sealing joints, and the sealing joints are connected to corresponding connecting pipes.

[0013] In a specific embodiment of the above-mentioned non-metallic flexible pipe joint, the non-metallic flexible pipe joint also includes a second tightening hoop, which is sleeved on the outside of the connecting pipe, and one end of the sealing joint is inserted into the corresponding connecting pipe and is detachably fixedly connected through the second tightening hoop.

[0014] In a specific embodiment of the above-mentioned non-metallic flexible pipe joint, the first tightening hoop and the second tightening hoop have the same structure. The first tightening hoop includes a hoop body, a fastening ring and a threaded rod. A connecting plate is fixed to one end of the hoop body, and the threaded rod is fixed to the connecting plate. A clamping plate is fixed to the other end of the hoop body, and a clamping groove is provided on the clamping plate. When the hoop body is bent, the threaded rod passes through the clamping groove and is threadedly connected to the fastening ring to form a ring structure of the hoop body.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention installs flexible pipes at both ends of the middle pipe section, which are deformable and can adjust the angle as needed. The present invention designs a fastening assembly to generate extrusion force on the delivery pipes to be connected to improve the fastening, thereby improving the firmness of the connection between the delivery pipe and the connector and preventing problems such as leakage caused by the connection part falling off.

[0017] 2. The connecting pipe and the connecting head, as well as the connecting pipe and the sealing joint are detachably fixed by a tightening hoop, which makes the fixation between the connecting pipe and the connecting head more firm and stable, prevents detachment, and ensures the sealing. A flow sensor is installed on the middle pipe section to display the flow rate for the user to watch.

[0018] 3. Setting multiple clamping rings on the outside of the flexible pipe can improve the pressure resistance of the flexible pipe and ensure the normal transmission of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0020] Figure 1 It is a cross-sectional view of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the overall structure of the present invention when the sleeve and the fastening assembly are not installed;

[0022] Figure 3 It is a structural diagram of the connection between the connector, the sleeve and the fastening assembly;

[0023] Figure 4 It is a schematic diagram of the structure of the connection between the pull rod, the push plate and the clamping teeth;

[0024] Figure 5 2 is a schematic structural diagram of the first tightening hoop;

[0025] Figure 6 yes Figure 1 A magnified view of the structure of the connecting pipe and the connector;

[0026] Figure 7 yes Figure 1 An enlarged view of the structure connecting the middle sealing joint and the connecting pipe.

[0027] List of reference numerals:

[0028] 1. Flexible pipe; 2. Connecting pipe; 3. Clamping ring; 4. Connecting head; 5. Annular protrusion; 6. Sealing ring; 7. Limiting ring; 8. Limiting protrusion; 9. First tightening hoop; 10. Connecting plate; 11. Threaded column; 12. Fastening ring; 13. Clamping plate; 14. Clamping groove; 15. Sleeve; 16. Sealing joint; 17. Flow sensor; 18. Support frame; 19. Pull rod; 20. Handle; 21. Spring; 22. Push block; 23. Clamping teeth; 24. Threaded teeth; 25. Second tightening hoop; 26. Annular clamping block. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the systems or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the use of terms such as "first" and "second" to define components is solely for the purpose of distinguishing those components. Unless otherwise stated, these terms have no special meanings and should not be construed as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0032] The present invention relates to the technical field of oil pipeline connection, and in particular to a non-metallic flexible pipe joint. The purpose is to solve the problem that after existing pipe joints are connected to a delivery pipeline, the docking portion is easily detached during use, causing leakage. To this end, the present invention provides a non-metallic flexible pipe joint, comprising a pipe docking assembly and an intermediate pipe section. The intermediate pipe section is connected to the pipe docking assembly at both ends. The pipe docking assembly includes a flexible pipe, a connector, and a fastening assembly. Connecting pipes are fixed to both ends of the flexible pipe, one of which is connected to the intermediate pipe section, and the other is detachably fixed to the connector at one end away from the flexible pipe. A sleeve is mounted on the connector, forming a cavity between the connector and the sleeve for connecting the delivery pipeline to be docked. The sleeve is mounted on the fastening assembly, which is configured to generate a radial extrusion force on the delivery pipeline connected in the cavity to achieve a tight connection. By mounting flexible pipes on both ends of the intermediate pipe section, the flexible pipe can be deformed, thereby adjusting the angle as needed. The fastening assembly is designed to generate a radial extrusion force on the delivery pipeline to be docked to achieve a tight connection, thereby improving the firmness of the connection between the delivery pipeline and the connector, and preventing the connection portion from detaching and causing leakage.

[0033] The non-metallic flexible pipe joint provided by the embodiment of the present invention is described in detail below with reference to the accompanying drawings.

[0034] See Figure 1-2 The present invention provides a non-metallic flexible pipe joint, including a pipe docking assembly and an intermediate pipe section 8, the two ends of the intermediate pipe section 8 are respectively connected to the pipe docking assembly, the pipe docking assembly includes a flexible pipe 1, a connector 4 and a fastening assembly, the two ends of the flexible pipe 1 are respectively fixed with connecting pipes 2, one connecting pipe 2 is connected to the intermediate pipe section 8, and the other connecting pipe 2 is detachably fixedly connected to the connector 4 at one end away from the flexible pipe 1, a sleeve 15 is installed on the connector 4, a cavity is formed between the sleeve 15 and the connector 4 for connecting the conveying pipe to be docked, a fastening assembly is installed on the sleeve 15, and the fastening assembly is configured to generate a radial extrusion force on the conveying pipe connected in the cavity to increase the friction force so as to achieve the purpose of fastening the conveying pipe in the cavity, thereby improving the firmness of the docking between the conveying pipe and the pipe joint and avoiding leakage problems caused by falling off.

[0035] In the above embodiment, the outer wall of the flexible pipe 1 is provided with a wear-resistant layer to improve wear resistance and extend its service life. The inner wall of the flexible pipe 1 is provided with an anti-corrosion layer to extend the service life of the joint and prevent damage. The flexible pipe 1 is a rubber bellows, and a metal snap ring 3 engages within the corrugated grooves of the flexible pipe 1. For example, the snap ring 3 can be made of stainless steel. The provision of multiple snap rings 3 can improve the compressive strength of the flexible pipe 1 and ensure proper transmission of the pipe. The connecting pipe 2 is a rubber tube that is sealed with the connector 4.

[0036] In one embodiment, a limiting ring 7 is fixed on the outer wall of the connector 4 , and an annular groove is formed on the limiting ring 7 . One end of the sleeve 15 is clamped in the annular groove to be installed on the connector 4 .

[0037] Specifically, an annular clamping block 26 is fixed to the inner wall of one end of the sleeve 15. The sleeve 15 has a spliced structure, so that after the sleeve 15 is sleeved on the connector 4, the annular clamping block 26 can be clamped in the annular groove. The sleeve 15 is installed on the connector 4 through the cooperation between the annular groove and the annular clamping block 26. For example, the sleeve 15 can be formed by splicing two semi-arc plates.

[0038] In one embodiment, see Figure 1 and Figure 6 The inner wall of the other connecting tube 2, away from the flexible pipe 1, is provided with a plurality of annular grooves arranged along the axis of the connecting tube 2. The outer wall of the connector 4, on the side of the retaining ring 7, is provided with annular protrusions 5 corresponding one-to-one with the annular grooves. When the end of the connector 4 with the annular protrusions 5 is inserted into the connecting tube 2, the annular protrusions 5 are inserted into the annular grooves. The connecting tube 2 is then detachably fixedly connected to the connector 4 by a first tightening hoop 9 provided on the outside. At least two first tightening hoops 9 are required for each connector 4 to connect to the connecting tube 2, which helps ensure the tightness of the connection.

[0039] Specifically, see Figure 5 The first tightening hoop 9 includes a hoop body, a fastening ring 12, and a threaded rod. A connecting plate 10 is fixed to one end of the hoop body, and the threaded rod is fixed to the connecting plate 10. A clamping plate 13 is fixed to the other end of the hoop body. The clamping plate 13 is provided with a clamping groove 14. When the hoop body is bent, the threaded rod passes through the clamping groove 14 and is threadedly connected to the fastening ring 12, so that the hoop body forms an annular structure. After the fastening ring 12 is connected to the threaded rod, it abuts against the clamping plate 13. The continuous rotation of the fastening ring 12 shortens the distance between the clamping plate 13 and the connecting plate 10, thereby reducing the entire annular diameter of the hoop body, achieving the purpose of tightening and fixing.

[0040] In the above embodiment, when the connecting pipe 2 and the connecting head 4 are installed, the annular protrusion 5 is inserted into the annular groove, and the sealing connection function is realized by tightening the first tightening hoop 9, which not only improves the connection firmness, but also the designed multiple annular protrusions 5 and annular grooves improve the sealing effect.

[0041] In one embodiment, see Figure 1 and Figure 7 The middle pipe section includes a flow sensor 17 and a sealing joint 16. The two end interfaces of the flow sensor 17 are connected with sealing joints 16, and the sealing joints are connected to the corresponding connecting pipes 2. The flow sensor is equipped with a display instrument that can display the flow rate for the convenience of users.

[0042] Specifically, the non-metallic flexible pipe joint also includes a second clamping hoop 25, which is sleeved onto the outside of the connecting pipe 2. One end of the sealing joint 16 is inserted into the corresponding connecting pipe 2 and is removably fixedly connected via the second clamping hoop 25. The first clamping hoop 9 and the second clamping hoop 25 have the same structure. At least two second clamping hoops 25 are required to connect each sealing joint 16 to the connecting pipe 2, ensuring a secure connection.

[0043] More specifically, see Figure 7 The outer wall of the sealing joint is provided with a plurality of limiting protrusions 8 arranged at equal intervals, and the inner wall of the connecting pipe is provided with limiting grooves matching the limiting protrusions 8. When the sealing joint is inserted into the connecting pipe, the limiting protrusions are inserted into the corresponding limiting grooves. In this way, after the second tightening hoop is tightened, the connection between the sealing joint and the connecting pipe is more firm and the sealing is better.

[0044] In one embodiment, see Figure 1 and Figure 3 On the outer wall of the connector 4, on the other side of the retaining ring 7, are multiple threaded teeth 24 arranged along the axis of the connector 4 and a sealing ring 6. The sealing ring 6 is spaced apart from the threaded teeth 24. The threaded teeth are used to limit the sealing ring and connect it to the pipe. The delivery pipe to be connected is inserted into the cavity between the sleeve 15 and the connector 4. The delivery pipe is connected to the threaded teeth. The provision of multiple sealing rings 6 ensures a tight seal between the connector 4 and the delivery pipe, preventing leakage.

[0045] In one embodiment, see Figure 3 and Figure 4 The fastening assembly includes a support frame 18, a pull rod 19 and a push block 22. The support frame 18 is fixed on the outer wall of the sleeve 15. A guide hole is provided on the support frame 18 that passes through the sleeve 15. The center line of the guide hole is perpendicular to the center line of the sleeve 15. The pull rod 19 is inserted into the guide hole. The top of the pull rod 19 is located on the outside of the support frame 18 and is fixed with a handle 20. The bottom end of the pull rod 19 is fixed with a push block 22. The end of the push block 22 facing away from the pull rod 19 is fixed with a clamping tooth 23. A spring 21 is provided on the pull rod 19. The pull rod 19 drives the push block 22 to generate radial extrusion force on the conveying pipe inserted between the sleeve 15 and the connector 4 under the action of the spring 21.

[0046] Specifically, one end of the spring 21 is fixedly connected to the support frame 18, and the other end of the spring 21 is against the push block 22. When the conveying pipe is located between the sleeve 15 and the connector 4, the push block 22 is lifted up, and the spring 21 is compressed to generate elastic force on the push block 22, so that the push block 22 drives the clamping teeth 23 to press against the conveying pipe and generate radial pressure on it, that is, the auxiliary sleeve 15 increases the friction between the conveying pipe and the conveying pipe, improves the tightness, makes the installation more firm and stable, and prevents detachment and leakage.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A non-metallic flexible pipe joint, characterized in that: It includes a pipe docking assembly and an intermediate pipe section, both ends of the intermediate pipe section are respectively connected to the pipe docking assembly, the pipe docking assembly includes a flexible pipe, a connector and a fastening assembly, both ends of the flexible pipe are respectively fixed with connecting pipes, one of the connecting pipes is connected to the intermediate pipe section, and the other connecting pipe is detachably fixedly connected to the connector at one end away from the flexible pipe, a sleeve is installed on the connector, a cavity is formed between the connector and the sleeve for connecting the conveying pipe to be docked, a fastening assembly is installed on the sleeve, and the fastening assembly is configured to generate radial extrusion force on the conveying pipe connected in the cavity to achieve fastening.

2. The non-metallic flexible pipe joint according to claim 1, characterized in that: The outer wall of the flexible pipe is provided with a wear-resistant layer, the inner wall of the flexible pipe is provided with an anti-corrosion layer, the flexible pipe is a corrugated pipe, and a clamping ring made of metal material is clamped in the corrugated groove of the flexible pipe.

3. The non-metallic flexible pipe joint according to claim 1, characterized in that: A limiting ring is fixed on the outer wall of the connector, and an annular groove is formed on the limiting ring. One end of the sleeve is clamped in the annular groove to be installed on the connector.

4. The non-metallic flexible pipe joint according to claim 3, characterized in that: The inner wall of the other connecting pipe at one end away from the flexible pipe is provided with a plurality of annular grooves arranged along the axis of the connecting pipe, and the outer wall of the connecting head on one side of the limiting ring is provided with an annular protrusion corresponding to the annular groove one by one. When the end of the connecting head with the annular protrusion is inserted into the connecting pipe, the annular protrusion is inserted into the annular groove, and the connecting pipe is provided with a first tightening hoop on the outside to achieve a detachable fixed connection with the connecting head.

5. The non-metallic flexible pipe joint according to claim 4, characterized in that: A plurality of thread teeth and a sealing ring arranged along the axis of the connector are provided on the outer wall of the connector on the other side of the limiting ring, and the sealing ring and the thread teeth are arranged at intervals.

6. The non-metallic flexible pipe joint according to claim 1, characterized in that: The fastening assembly includes a support frame, a pull rod and a push block. The support frame is fixed on the outer wall of the sleeve. The support frame is provided with a guide hole that passes through the sleeve. The center line of the guide hole is perpendicular to the center line of the sleeve. The pull rod is inserted into the guide hole. The top end of the pull rod is located on the outside of the support frame and is fixed with a handle. The push block is fixed to the bottom end of the pull rod. The push block is fixed with a clamping tooth at one end facing away from the pull rod. A spring is provided on the pull rod. The pull rod drives the push block to generate radial extrusion force on the conveying pipe inserted between the sleeve and the connector under the action of the spring force.

7. The non-metallic flexible pipe joint according to claim 1, characterized in that: The middle pipe section includes a flow sensor and a sealing joint. Both end interfaces of the flow sensor are connected with sealing joints, and the sealing joints are connected to corresponding connecting pipes.

8. The non-metallic flexible pipe joint according to claim 7, characterized in that: The non-metallic flexible pipe joint also includes a second tightening hoop, which is sleeved on the outside of the connecting pipe. One end of the sealing joint is inserted into the corresponding connecting pipe and is detachably fixedly connected through the second tightening hoop.

9. The non-metallic flexible pipe joint according to claim 1, characterized in that: The first tightening hoop and the second tightening hoop have the same structure. The first tightening hoop includes a hoop body, a fastening ring and a threaded rod. A connecting plate is fixed to one end of the hoop body, and the threaded rod is fixed to the connecting plate. A clamping plate is fixed to the other end of the hoop body, and a clamping groove is provided on the clamping plate. When the hoop body is bent, the threaded rod passes through the clamping groove and is threadedly connected to the fastening ring to form a ring structure of the hoop body.

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