Fastening and sealing structure of double-ferrule type pipe joint

Abstract

The utility model discloses a fastening and sealing structure of a double-ferrule type pipe joint, and relates to the technical field of double-ferrule type pipe joints. The fastening and sealing structure of the double-ferrule type pipe joint comprises a connector, threaded sleeves are fixedly connected to the surfaces of the left side and the right side of the connector respectively, the outer surfaces of the threaded sleeves are sleeved with ferrule nuts in a threaded mode, pipelines are arranged in the ferrule nuts, and a cavity is formed in the connector; a rotating groove is formed in the surface of the side, close to the connector, of the clamping sleeve nut, a limiting ring is rotationally connected into the rotating groove, embedding grooves are formed in the surfaces of the left side and the right side of the connector correspondingly, an arc-shaped plate is fixedly connected to the surface of the side, close to the connector, of the limiting ring, and the surface of the side, away from the limiting ring, of the arc-shaped plate slidably penetrates into the cavity. The clamping sleeve nut can be locked after the pipeline is connected, the problem that liquid in the pipeline overflows due to the fact that the sealing performance of the pipeline is reduced due to horizontal movement of the clamping sleeve nut is avoided, and the operation stability of the whole device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of double-ferrule type pipe joints, in particular to a fastening and sealing structure of a double-ferrule type pipe joint. Background Art

[0002] The double ferrule pipe fitting is composed of a fitting body, a front ferrule, a back ferrule and a ferrule nut. It is easy to connect and resistant to high pressure. It is widely used in the connection of oil, gas, water and other media pipelines.

[0003] In the prior art, when a double ferrule pipe joint is connected to a pipeline, the ferrule nut, the rear ferrule, and the front ferrule are first put onto the pipeline from the end of the pipeline in sequence, and then the end of the pipeline is inserted into the joint body, and then the ferrule nut is tightened on the joint body, and the ferrule nut is used to squeeze the front and rear ferrules to achieve sealing. However, when the pipeline vibrates frequently, the locking force of the ferrule nut is easily reduced, and then the front and rear ferrules are slightly displaced, resulting in the sealing performance of the overall structure being affected. In view of this, we propose a fastening and sealing structure for a double ferrule pipe joint. Utility Model Content

[0004] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide a fastening and sealing structure for a double-ferrule type pipe joint, which can solve the problem that when the pipeline vibrates frequently, the locking force of the ferrule nut is easily reduced, thereby causing slight displacement of the front and rear ferrules, thereby affecting the sealing performance of the overall structure.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fastening and sealing structure of a double-ferrule pipe joint, comprising a connector, wherein the left and right side surfaces of the connector are respectively fixedly connected with threaded sleeves, the outer surface of the threaded sleeve is threadedly sleeved with a ferrule nut, a pipe is arranged inside the ferrule nut, a cavity is arranged inside the connector, a rotation groove is arranged on the side surface of the ferrule nut close to the connector, a limiting ring is rotatably connected inside the rotating groove, embedding grooves are respectively arranged on the left and right side surfaces of the connector, an arc plate is fixedly connected to the side surface of the limiting ring close to the connector, a side surface of the arc plate away from the limiting ring slides into the interior of the cavity, a locking groove is arranged on the lower side surface of the arc plate, a pressing plate is arranged on the upper side surface of the connector, and a locking assembly is arranged on the pressing plate.

[0006] Preferably, the locking assembly includes a displacement rod, which is fixedly connected to the lower surface of the pressing plate. The lower surface of the displacement rod slides into the interior of the cavity, and a magnet is fixedly connected to the inner wall of the cavity.

[0007] Preferably, the lower end of the displacement rod is fixedly connected with an arc-shaped locking plate, and the upper surface of the arc-shaped locking plate is fixedly connected with a locking protrusion.

[0008] Preferably, a magnet is also provided on the lower surface of the arc-shaped locking plate.

[0009] Preferably, the two magnets are arranged with the same polarity.

[0010] Preferably, a conical sealing tube is fixedly connected to the inner wall of the connector.

[0011] Preferably, a sealing sleeve is fixedly connected to the right side surface of the ferrule nut.

[0012] Preferably, the inner wall of the sealing sleeve is provided with a front ferrule and a rear ferrule, and the inner walls of the front ferrule and the rear ferrule are in contact with the outer surface of the pipeline.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The fastening and sealing structure of the double-ferrule type pipe joint presses the pressing plate downward when the arc plate enters the cavity. The pressing plate moves, which drives the locking assembly to move. The arc plate is then continued to move until the limiting ring contacts the inner wall of the embedded groove. At this time, the pressing plate is released and the locking assembly cooperates with the locking groove to complete the locking of the arc plate. Through the above structure, the ferrule nut can be locked after the pipeline is connected to prevent it from moving horizontally, which will lead to a decrease in the sealing of the pipeline and cause the liquid in the pipeline to overflow, thereby improving the operating stability of the overall device.

[0015] The fastening and sealing structure of the double-ferrule type pipe joint will synchronously squeeze the front ferrule and the rear ferrule to complete the sealing of the pipeline when the ferrule nut rotates and moves, and seal the connection between the pipeline and the sealing sleeve through the tapered sealing tube. Through the above structure, the tapered sealing tube can be used to seal the connection between the pipeline sealing sleeve after the pipeline is connected, thereby reducing and sharing the pressure of the sealing sleeve, the front ferrule and the rear ferrule. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 It is a structural schematic diagram of a fastening and sealing structure of a double-ferrule type pipe joint of the utility model;

[0018] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0019] Figure 3 This is a schematic diagram of the embedding slot of the utility model;

[0020] Figure 4 It is a schematic diagram of the rotating groove of the utility model.

[0021] Figure numerals: 1. Connector; 2. Threaded sleeve; 3. Ferrule nut; 4. Pipe; 5. Cavity; 6. Rotation groove; 7. Limiting ring; 8. Embedding groove; 9. Arc plate; 10. Locking groove; 11. Pressing plate; 12. Displacement rod; 13. Magnet; 14. Arc locking plate; 15. Locking protrusion; 16. Conical sealing tube; 17. Sealing sleeve; 18. Front ferrule; 19. Rear ferrule. DETAILED DESCRIPTION

[0022] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0023] See also Figure 1-4 The utility model provides a technical solution: a fastening and sealing structure of a double-ferrule type pipe joint, comprising a connector 1, a threaded sleeve 2 is fixedly connected to the left and right side surfaces of the connector 1, a ferrule nut 3 is threadedly sleeved on the outer surface of the threaded sleeve 2, a pipe 4 is arranged inside the ferrule nut 3, a cavity 5 is provided inside the connector 1, a rotation groove 6 is provided on the side surface of the ferrule nut 3 close to the connector 1, a limiting ring 7 is rotatably connected inside the rotating groove 6, an embedding groove 8 is provided on the left and right side surfaces of the connector 1, an arc plate 9 is fixedly connected to the side surface of the limiting ring 7 close to the connector 1, a side surface of the arc plate 9 away from the limiting ring 7 slides into the inside of the cavity 5, a locking groove 10 is provided on the lower side surface of the arc plate 9, a pressing plate 11 is provided on the upper side surface of the connector 1, and a locking component is arranged on the pressing plate 11. When connecting the pipe 4, the pipe 4 is inserted into the interior of the connector 1, and then the ferrule nut 3 is threadedly sleeved It is arranged on the outer surface of the connecting head 1, and when the ferrule nut 3 rotates and moves, it will synchronously drive the limiting ring 7 to move. However, after the limiting ring 7 enters the embedded groove 8, the limiting ring 7 is rotated, and the limiting ring 7 is used to drive the arc plate 9 to move. The arc plate 9 stops when it moves to the point where it can extend into the cavity 5. At this time, the limiting ring 7 is kept from rotating, and the ferrule nut 3 is continued to be rotated so that the arc plate 9 extends into the cavity 5. When the arc plate 9 enters the cavity 5, the pressing plate 11 is pressed downward. After the pressing plate 11 moves, it drives the locking assembly to move, and then the arc plate 9 is continued to be moved until the limiting ring 7 contacts the inner wall of the embedded groove 8. At this time, the pressing plate 11 is released, and the locking assembly is used to cooperate with the locking groove 10 to complete the locking of the arc plate 9. Through the above structure, the ferrule nut 3 can be locked after the pipeline 4 is connected to prevent it from moving horizontally, thereby reducing the sealing of the pipeline 4 and causing the liquid in the pipeline 4 to overflow, thereby improving the operating stability of the overall device.

[0024] Furthermore, the locking assembly includes a displacement rod 12, which is fixedly connected to the lower surface of the pressing plate 11, and the lower surface of the displacement rod 12 slides into the interior of the cavity 5. The inner wall of the cavity 5 is fixedly connected with a magnet 13, and the lower end of the displacement rod 12 is fixedly connected with an arc-shaped locking plate 14, and the upper surface of the arc-shaped locking plate 14 is fixedly connected with a locking protrusion 15. The lower surface of the arc-shaped locking plate 14 is also provided with a magnet 13, and the two magnets 13 are arranged in the same sex. The inner wall of the connector 1 is fixedly connected with a conical sealing tube 16, and the right side surface of the ferrule nut 3 is fixedly connected with a sealing sleeve 17. The inner wall of the sealing sleeve 17 is provided with a front ferrule 18 and a rear ferrule 19. The inner walls of the front ferrule 18 and the rear ferrule 19 are in contact with the outer surface of the pipe 4. When the pressing plate 11 descends, the displacement rod 12 will be synchronously driven to move, and the displacement After the rod 12 moves, it synchronously drives the arc locking plate 14 to descend. When the arc locking plate 14 descends, it drives the locking protrusion 15 to descend, providing space for the movement of the arc plate 9. After the arc plate 9 moves to the specified position, the pressing plate 11 is released and the arc locking plate 14 is pushed upward by using the like repulsion of the two magnets 13, so that the locking protrusion 15 enters the interior of the locking groove 10 to complete the locking of the arc plate 9. At the same time, when the sleeve nut 3 rotates and moves, the front sleeve 18 and the rear sleeve 19 are synchronously squeezed to complete the sealing of the pipeline 4, and the connection between the pipeline 4 and the sealing sleeve 17 is sealed by the conical sealing tube 16. Through the above structure, the conical sealing tube 16 can be used to seal the connection between the sealing sleeve 17 of the pipeline 4 after the pipeline 4 is connected, thereby reducing and sharing the pressure of the sealing sleeve 17, the front sleeve 18 and the rear sleeve 19.

[0025] Working principle: When connecting the pipe 4, insert the pipe 4 into the interior of the connector 1, and then thread the ferrule nut 3 onto the outer surface of the connector 1. When the ferrule nut 3 rotates and moves, it will synchronously drive the limiting ring 7 to move. However, after the limiting ring 7 enters the interior of the embedding groove 8, the limiting ring 7 is rotated, and the limiting ring 7 is used to drive the arc plate 9 to move. When the arc plate 9 moves to the point where it can extend into the cavity 5, it stops. At this time, the limiting ring 7 is kept from rotating, and the ferrule nut 3 is continued to be rotated so that the arc plate 9 extends into the interior of the cavity 5. When the arc plate 9 enters the cavity 5, the pressing plate 11 is pressed downward. After the pressing plate 11 moves, it drives the locking assembly to move. Then, the arc plate 9 is continued to be moved until the limiting ring 7 contacts the inner wall of the embedding groove 8. At this time, the pressing plate 11 is released to facilitate The locking assembly is used in conjunction with the locking groove 10 to lock the arc plate 9. When the pressing plate 11 descends, the displacement rod 12 will be driven to move synchronously. After the displacement rod 12 moves, the arc locking plate 14 will be driven to descend synchronously. When the arc locking plate 14 descends, the locking protrusion 15 will be driven to descend, providing space for the movement of the arc plate 9. After the arc plate 9 moves to the specified position, the pressing plate 11 is released and the arc locking plate 14 is pushed upward by the repulsion of the two magnets 13, so that the locking protrusion 15 enters the interior of the locking groove 10 to complete the locking of the arc plate 9. At the same time, when the sleeve nut 3 rotates and moves, the front sleeve 18 and the rear sleeve 19 will be squeezed synchronously to complete the sealing of the pipe 4, and the connection between the pipe 4 and the sealing sleeve 17 is sealed through the conical sealing tube 16.

[0026] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A fastening and sealing structure of a double-ferrule type pipe joint, comprising a connector (1), characterized in that: The left and right side surfaces of the connector (1) are respectively fixedly connected with threaded sleeves (2), the outer surface of the threaded sleeve (2) is threadedly sleeved with a sleeve nut (3), a pipe (4) is arranged inside the sleeve nut (3), a cavity (5) is arranged inside the connector (1), a rotation groove (6) is arranged on the side surface of the sleeve nut (3) close to the connector (1), a limiting ring (7) is rotatably connected inside the rotation groove (6), an embedding groove (8) is respectively arranged on the left and right side surfaces of the connector (1), a side surface of the limiting ring (7) close to the connector (1) is fixedly connected with an arc plate (9), a side surface of the arc plate (9) away from the limiting ring (7) slides into the cavity (5), a locking groove (10) is arranged on the lower side surface of the arc plate (9), a pressing plate (11) is arranged on the upper side surface of the connector (1), and a locking assembly is arranged on the pressing plate (11).

2. The fastening and sealing structure of a double-ferrule type pipe joint according to claim 1, characterized in that: The locking assembly comprises a displacement rod (12), the displacement rod (12) being fixedly connected to the lower surface of the pressing plate (11), the lower surface of the displacement rod (12) slidingly penetrating into the interior of the cavity (5), and a magnet (13) being fixedly connected to the inner wall of the cavity (5).

3. The fastening and sealing structure of a double-ferrule type pipe joint according to claim 2, characterized in that: The lower end of the displacement rod (12) is fixedly connected to an arc-shaped locking plate (14), and the upper surface of the arc-shaped locking plate (14) is fixedly connected to a locking protrusion (15).

4. The fastening and sealing structure of a double-ferrule type pipe joint according to claim 3, characterized in that: The lower surface of the arc-shaped locking plate (14) is also provided with a magnet (13).

5. The fastening and sealing structure of a double-ferrule type pipe joint according to claim 4, characterized in that: The two magnets (13) are arranged with the same polarity.

6. The fastening and sealing structure of a double-ferrule type pipe joint according to claim 1, characterized in that: A conical sealing tube (16) is fixedly connected to the inner wall of the connector (1).

7. The fastening and sealing structure of a double-ferrule type pipe joint according to claim 1, characterized in that: A sealing sleeve (17) is fixedly connected to the right side surface of the ferrule nut (3).

8. The fastening and sealing structure of a double-ferrule type pipe joint according to claim 7, characterized in that: The inner wall of the sealing sleeve (17) is provided with a front ferrule (18) and a rear ferrule (19), and the inner walls of the front ferrule (18) and the rear ferrule (19) are in contact with the outer surface of the pipe (4).

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