High pressure non-metallic joint

Abstract

The utility model relates to pipeline joint technical field, concretely is a kind of high-pressure nonmetallic joint, including fixed pipe, its outside is provided with outer sleeve pipe, outer sleeve pipe and fixed pipe are sleeved with flexible composite pipe between, the outside of flexible composite pipe is provided with locking sleeve, the inside of locking sleeve is provided with locking mechanism;Guide sleeve, its one end outside close to outer sleeve pipe is fixedly connected in locking sleeve, and the tightening mechanism is arranged between guide sleeve and outer sleeve pipe.The utility model realizes the radial even locking of flexible composite pipe by the cooperation of locking sleeve and conical cavity, half cone sleeve, effectively solve the problem that traditional nonmetallic joint is prone to radial displacement and sealing failure under high pressure working condition.

Description

Technical Field

[0001] This utility model relates to the field of pipe joint technology, specifically a high-pressure non-metallic joint. Background Technology

[0002] Non-metallic pipes are gradually replacing metal pipes in fields such as petrochemicals and marine engineering due to their advantages such as corrosion resistance and light weight. These pipes often require flange joints to connect pipe sections. Especially under high-pressure transmission conditions, the joints must meet the dual requirements of axial sealing reliability and radial pressure resistance stability.

[0003] Currently, the commonly used flanged non-metallic joints mostly employ a single axial compression method for their locking mechanism. Under high-pressure conditions, this structure is prone to creep displacement of the flexible composite pipe due to insufficient radial constraint, leading to sealing failure after long-term use. Utility Model Content

[0004] The purpose of this utility model is to provide a high-pressure non-metallic connector to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A high-voltage non-metallic connector, comprising

[0007] The fixed tube is provided with an outer sleeve, and a flexible composite tube is sleeved between the outer sleeve and the fixed tube. A locking sleeve is provided on the outside of the flexible composite tube, and a locking mechanism is provided on the inside of the locking sleeve.

[0008] A guide sleeve is fixedly connected to the outer end of the locking sleeve near the outer sleeve, and a tightening mechanism is provided between the guide sleeve and the outer sleeve.

[0009] Preferably, the tightening mechanism includes a guide groove circumferentially formed at the end of the guide sleeve away from the locking sleeve, and a rotating sleeve disposed outside the guide groove. A guide ring is fixedly connected to the end of the rotating sleeve near the guide groove, and the guide ring slides and matches the guide groove.

[0010] Preferably, the inner wall of the rotating sleeve is threaded to the outer wall of the outer sleeve, and a sealing ring is fitted at the connection between the outer sleeve, the flexible composite tube, the locking sleeve and the guide sleeve.

[0011] Preferably, a flange is fixedly connected to the outer wall of the fixed tube away from the locking sleeve, the outer tube away from the locking sleeve is fixedly connected to the right end face of the flange, a limiting ring is fixedly connected to the middle outer wall of the guide sleeve along the circumferential direction, and a flange is movably sleeved between the limiting ring and the locking sleeve and outside the guide sleeve.

[0012] Preferably, the locking mechanism includes a conical cavity formed in the inner wall of the locking sleeve, and semi-conical sleeves slidably connected to both ends of the conical cavity, wherein the inner walls of the two semi-conical sleeves are in contact with the outer wall of the flexible composite tube.

[0013] Preferably, a sealing ring is movably fitted at the connection between the flange, the fixed pipe, the outer sleeve, and the flexible composite pipe.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This high-pressure non-metallic connector, through the cooperation of the locking sleeve with the conical cavity and the semi-conical sleeve, achieves radial uniform locking of the flexible composite pipe, effectively solving the problem of radial displacement and sealing failure of traditional non-metallic connectors under high-pressure conditions.

[0016] 2. This high-pressure non-metallic connector achieves mechanical force-increasing tightening through the threaded connection between the rotating sleeve and the outer sleeve, effectively solving the technical problems of laborious traditional manual pushing installation and difficulty in ensuring tight contact at the connection point, thus achieving the purpose of labor-saving operation. Attached Figure Description

[0017] Figure 1 This is a schematic cross-sectional view of the overall structure of this utility model;

[0018] Figure 2 For the present utility model Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 For the present utility model Figure 1 Enlarged view of point B in the middle;

[0020] Figure 4 For the present utility model Figure 1 Enlarged diagram of point C in the middle.

[0021] In the diagram: 1. Fixed pipe; 2. Outer pipe; 3. Flexible composite pipe; 4. Locking sleeve; 5. Guide sleeve; 6. Guide groove; 7. Rotating sleeve; 8. Guide ring; 9. Flange 1; 10. Limiting ring; 11. Flange 2; 12. Sealing ring 2; 13. Conical cavity; 14. Semi-conical sleeve; 15. Sealing ring 1. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figure 1-4 As shown, this utility model provides a technical solution:

[0024] A high-pressure non-metallic connector includes a fixed pipe 1, an outer sleeve 2, a flexible composite pipe 3 sleeved between the outer sleeve 2 and the fixed pipe 1, a locking sleeve 4 outside the flexible composite pipe 3, a locking mechanism inside the locking sleeve 4, the locking mechanism including a conical cavity 13 formed in the inner wall of the locking sleeve 4, and semi-conical sleeves 14 slidably connected to both ends of the conical cavity 13, the inner walls of the two semi-conical sleeves 14 contacting the outer wall of the flexible composite pipe 3, a guide sleeve 5 fixedly connected to the outer end of the locking sleeve 4 near the outer sleeve 2, and a tightening mechanism between the guide sleeve 5 and the outer sleeve 2, the tightening mechanism including a guide groove 6 formed circumferentially at the end of the guide sleeve 5 away from the locking sleeve 4, and a rotating sleeve 7 disposed outside the guide groove 6. A guide ring 8 is fixedly connected to one end of the rotating sleeve 7 near the guide groove 6. The guide ring 8 slides and matches the guide groove 6. A flange 9 is fixedly connected to the outer wall of the fixed tube 1 away from the locking sleeve 4. The outer tube 2 away from the locking sleeve 4 is fixedly connected to the right end face of the flange 9. A limit ring 10 is fixedly connected to the outer wall of the middle part of the guide sleeve 5 along the circumferential direction. A flange 11 is movably sleeved between the limit ring 10 and the locking sleeve 4 and outside the guide sleeve 5. The inner wall of the rotating sleeve 7 is threadedly connected to the outer wall of the outer tube 2. A sealing ring 12 is sleeved at the connection of the outer tube 2, the flexible composite tube 3, the locking sleeve 4 and the guide sleeve 5. A sealing ring 15 is movably sleeved at the connection of the flange 9, the fixed tube 1, the outer tube 2 and the flexible composite tube 3.

[0025] In this embodiment, the locking sleeve 4, in conjunction with the conical cavity 13 and the semi-conical sleeve 14, achieves radial uniform locking of the flexible composite tube 3, effectively solving the problem that traditional non-metallic joints are prone to radial displacement and sealing failure under high pressure conditions.

[0026] Furthermore, by connecting the rotating sleeve 7 with the outer sleeve 2 through a threaded connection, mechanical force-increasing tightening is achieved, effectively solving the technical problems of traditional manual pushing installation being laborious and difficult to ensure tight contact at the connection point, thus achieving the purpose of labor-saving operation.

[0027] Working principle: First, the locking sleeve 4 is passed through the end of the flexible composite tube 3 and completely fitted onto the outside of the flexible composite tube 3, ensuring that the portion of the flexible composite tube 3 extending from the locking sleeve 4 has sufficient length. Then, the extended portion of the flexible composite tube 3 is gradually fitted into the annular space between the fixed tube 1 and the outer tube 2, so that the inner wall of the flexible composite tube 3 is tightly fitted with the outer wall of the fixed tube 1. Next, the rotating sleeve 7 is grasped and twisted clockwise. Through the threaded engagement between the inner wall of the rotating sleeve 7 and the outer wall of the outer tube 2, the guide sleeve 5 drives the locking sleeve 4 to move axially towards the flange 9. During the process, the conical cavity 13 inside the locking sleeve 4 pushes the two semi-conical sleeves 14 to slide along the inclined plane, causing the semi-conical sleeves 14 to radially contract and evenly press against the outer wall of the flexible composite pipe 3. After the locking sleeve 4 moves to the preset position, manually rotate the flange 2 11 to make it rotate circumferentially until the mounting hole on the flange 2 11 is completely aligned with the corresponding bolt hole on the flange 1 9. At this time, the bolts are passed through the corresponding mounting holes of the flange 2 11 and the flange 1 9 in sequence and precisely connected with the flange hole at the end of the pipe to be connected. Finally, a torque wrench is used to gradually tighten the nut according to the specified tightening sequence and torque value.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-voltage non-metallic connector, characterized in that: include A fixed tube (1) is provided with an outer sleeve (2) on its outside. A flexible composite tube (3) is sleeved between the outer sleeve (2) and the fixed tube (1). A locking sleeve (4) is provided on the outside of the flexible composite tube (3). A locking mechanism is provided on the inside of the locking sleeve (4). A guide sleeve (5) is fixedly connected to the outside of the locking sleeve (4) near the outer sleeve (2), and a tightening mechanism is provided between the guide sleeve (5) and the outer sleeve (2).

2. A high-voltage non-metallic connector according to claim 1, characterized in that: The tightening mechanism includes a guide groove (6) circumferentially opened at one end of the guide sleeve (5) away from the locking sleeve (4), and a rotating sleeve (7) disposed outside the guide groove (6). A guide ring (8) is fixedly connected to one end of the rotating sleeve (7) near the guide groove (6), and the guide ring (8) slides and matches the guide groove (6).

3. A high-voltage non-metallic connector according to claim 2, characterized in that: The inner wall of the rotating sleeve (7) is threadedly connected to the outer wall of the outer sleeve (2), and a sealing ring (12) is fitted at the connection of the outer sleeve (2), the flexible composite tube (3), the locking sleeve (4) and the guide sleeve (5).

4. A high-voltage non-metallic connector according to claim 3, characterized in that: A flange (9) is fixedly connected to the outer wall of the fixed tube (1) away from the locking sleeve (4). The outer tube (2) is fixedly connected to the right end face of the flange (9) at the end away from the locking sleeve (4). A limiting ring (10) is fixedly connected to the outer wall of the middle part of the guide sleeve (5) along the circumferential direction. A flange (11) is movably sleeved between the limiting ring (10) and the locking sleeve (4) and outside the guide sleeve (5).

5. A high-voltage non-metallic connector according to claim 4, characterized in that: The locking mechanism includes a conical cavity (13) opened on the inner wall of the locking sleeve (4), and a semi-conical sleeve (14) slidably connected to both ends of the conical cavity (13). The inner walls of the two semi-conical sleeves (14) are in contact with the outer wall of the flexible composite tube (3).

6. A high-voltage non-metallic connector according to claim 5, characterized in that: A sealing ring (15) is movably sleeved at the connection of the flange (9), the fixed pipe (1), the outer sleeve (2) and the flexible composite pipe (3).

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