Rotary joint

Abstract

The utility model relates to a rotary joint, and belongs to the field of rotary joints, a connecting assembly is arranged on the inner wall of a joint body, a replacement assembly is arranged in the joint body, the connecting assembly comprises a threaded pipe and a screwing nut, a connecting hole is formed in the inner wall of the joint body, the bottom of the threaded pipe is inserted into the inner wall of the connecting hole, and the screwing nut is arranged in the threaded pipe. The screwing nut is connected to the outer side of the threaded pipe in a threaded mode, and a threaded through hole is formed in the outer side of the connector body. According to the rotary joint, a joint body is provided with a channel used for replacing and filling balls, and the joint body rolls relative to a threaded pipe through the balls; a pipeline is screwed into the connector body through the threaded through hole, the sealing ring is arranged at the joint of the connector body and the threaded pipe, the threaded pipe can rotate along the sealing ring, abrasion of the threaded pipe and the connector body is reduced through the rubber cushion block, and the service life is prolonged. And the balls can be supplemented and replaced through the channels without being disassembled, so that the maintenance is convenient.

Description

Technical Field

[0001] The present application relates to the technical field of rotary joints, and in particular to a rotary joint. Background Art

[0002] As a mechanical sealing component, the rotary joint is assembled between the fixed supply pipeline and the hose reel to achieve the sealing of the fluid medium during the input and output process. It is mainly used to connect fixed and rotating equipment, allowing the fluid medium (such as liquid, gas, steam, etc.) to flow freely between the rotating equipment and the fixed pipeline while maintaining sealing to prevent fluid leakage. This joint is widely used in various industrial fields, such as papermaking, textile, chemical, petroleum, steel, rubber, plastic, pharmaceutical, shipbuilding, automobile, aerospace, etc.

[0003] A rotary joint disclosed in Chinese patent announcement No. (CN212480457U) includes a cylinder, openings are provided at both ends of the cylinder, a seal is provided on the inside of the cylinder, the seal and the cylinder are connected together by a pin, a rotating shaft is provided directly above the seal, the part of the rotating shaft inserted into the cylinder is connected to a bearing, an end cover is provided at the bottom of the cylinder, and gaskets and springs are provided between the end cover and the seal from top to bottom. The utility model solves the problem that the existing rotary joint seal cannot be accurately positioned during the safety process, and then the seal is squeezed and deformed or even fails, which ultimately leads to poor sealing effect or even failure to seal. By improving and optimizing the structure of the rotary joint, the positioning structure of the rotary joint is optimized, and three-point arc positioning is adopted instead of two-point straight line positioning. At the same time, the size of the directional groove is reduced to ensure its positioning accuracy and prevent the seal from being skewed.

[0004] In the prior art such as the above patent, there is still a problem that when the internal bearing of the rotary joint is damaged, it needs to be completely disassembled to replace the bearing, which brings trouble to maintenance. The rotary joint is assembled between the fixed supply pipeline and the hose reel as a mechanical sealing component. When the bearing in the rotary joint fails, its maintenance efficiency affects the use efficiency of the joint. Utility Model Content

[0005] In view of the deficiencies in the prior art, the present application provides a rotary joint having the advantages of convenient replacement and maintenance, and solves the problem that when the internal bearing of the rotary joint is damaged, it needs to be completely disassembled to replace the bearing, which causes trouble for maintenance.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a rotary joint, comprising a joint body, an inner wall of the joint body is provided with a connecting assembly, and an interior of the joint body is provided with a replacement assembly;

[0007] The connection assembly includes a threaded tube and a screw nut. The inner wall of the joint body is provided with a connection hole. The bottom of the threaded tube is inserted into the inner wall of the connection hole. The screw nut is threadedly connected to the outer side of the threaded tube. The outer side of the joint body is provided with a threaded through hole.

[0008] By adopting this technical solution, internal components can be replaced without disassembling the entire rotary joint, thereby improving the convenience of maintenance and repair.

[0009] Furthermore, the diameter of the threaded tube is equal to the aperture of the connecting hole.

[0010] The adoption of this technical solution helps to improve the tightness and sealing of the connection, ensuring that the fluid medium will not leak during the transmission process.

[0011] Furthermore, one end of the threaded pipe away from the joint body is threadedly connected with a hose reel.

[0012] By adopting this technical solution, the connection between the swivel joint and the hose reel is made more firm and convenient, and the installation and fixation of the swivel joint is facilitated.

[0013] Furthermore, the replacement component includes a ball and a sealing ring, a replacement channel is opened inside the joint body, the ball is rotatably connected to the inner wall of the replacement channel, a sealing groove is opened at the connection between the joint body and the threaded tube, and the sealing ring is clamped on the inner wall of the sealing groove.

[0014] By adopting this technical solution, the sealing performance of the rotary joint is improved. The rotating connection of the ball may help reduce friction and improve the rotational flexibility of the rotary joint. The threaded tube can rotate along the sealing ring, and the wear of the threaded tube and the joint body is reduced by the rubber gasket, thereby increasing the service life. The ball can be supplemented and replaced through the channel without disassembly, which is convenient for maintenance.

[0015] Furthermore, a filling channel is formed on the inner wall of the replacement channel and penetrates through and extends to the outside of the joint body, and the aperture of the filling channel is equal to the diameter of the ball.

[0016] By adopting this technical solution, the design of the filling channel allows the balls to be replaced, making maintenance and replacement more convenient.

[0017] Furthermore, the number of the balls is not less than two and they are evenly distributed on the inner wall of the replacement channel.

[0018] By adopting this technical solution, the stability and load-bearing capacity of the rotary joint can be improved. The uniform distribution may help reduce wear and extend the service life. The uniformly distributed ball design helps reduce the wear of a single ball and extend the service life of the rotary joint.

[0019] Furthermore, an inner wall of the filling channel is provided with an internal thread, and a screw cap is threadedly connected to the inner wall of the filling channel.

[0020] By adopting this technical solution, a convenient sealing and fixing method is provided, and the screw cap may help protect internal components from pollution and damage. The design of the screw cap can prevent dust and other contaminants from entering the interior of the connector, protecting the internal components from damage.

[0021] Furthermore, the cross-section of the screw cap is T-shaped.

[0022] The adoption of this technical solution helps to provide a better tightening effect. The T-shaped design facilitates the use of tools for tightening or loosening, thereby improving the convenience of operation.

[0023] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0024] (1) The rotary joint has a channel for replacing and filling balls on the joint body, and the joint body and the threaded pipe roll relative to each other through the balls; the pipe is screwed into the joint body through the threaded through hole, and a sealing ring is provided at the connection between the joint body and the threaded pipe, and the threaded pipe can rotate along the sealing ring. The wear of the threaded pipe and the joint body is reduced by the rubber pad, thereby increasing the service life; the balls can be supplemented and replaced through the channel without disassembly, which is convenient for maintenance.

[0025] (2) The design allows for quick replacement of internal components, reducing the time and labor costs of complete disassembly due to bearing damage. By using a combination of balls and sealing rings, the sealing effect of the joint is improved, the risk of leakage of fluid media during transmission is reduced, the positioning accuracy of the rotary joint is improved, and the seal is prevented from skewing, thereby improving the sealing effect. The threaded connection between the threaded pipe and the hose reel, as well as the T-shaped cross-sectional design of the rotary cover, make installation and fixing easier and faster. The rotating connection design of the ball reduces the friction of the rotary joint during operation and improves the flexibility and efficiency of rotation. The design of the replacement channel and the filling channel makes the maintenance, inspection and replacement of the ball and sealing ring more convenient without disassembling the entire joint. The evenly distributed ball design helps to reduce the wear of individual balls and extend the service life of the rotary joint. The design of the rotary cover can prevent dust and other contaminants from entering the interior of the joint and protect the internal components from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of this application;

[0027] Figure 2 A schematic diagram of the components connected for this application;

[0028] Figure 3 Schematic diagram of components replaced for this application;

[0029] Figure 4 For this application Figure 3 A schematic diagram of the enlarged structure in the middle.

[0030] In the figure: 1. Connector body; 2. Connecting assembly; 21. Threaded pipe; 22. Screw nut; 23. Connecting hole; 24. Threaded through hole; 3. Replacement assembly; 31. Ball; 32. Sealing ring; 33. Replacement channel; 34. Sealing groove; 35. Filling channel; 36. Screw cap. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] See also Figure 1 A rotary joint in this embodiment includes a joint body 1, an inner wall of the joint body 1 is provided with a connecting component 2, and an interior of the joint body 1 is provided with a replacement component 3.

[0033] See also Figure 2 In this embodiment, the connection component 2 includes a threaded tube 21 and a screw nut 22. A connection hole 23 is provided on the inner wall of the joint body 1. The bottom of the threaded tube 21 is inserted into the inner wall of the connection hole 23. The screw nut 22 is threadedly connected to the outer side of the threaded tube 21. A threaded through hole 24 is provided on the outer side of the joint body 1. The joint body 1 is a cylindrical body with one end passing through it. The surface of the joint body 1 is provided with a threaded through hole 24 for accessing the pipeline; the threaded end of the threaded tube 21 can be screwed onto the hose reel, and the other end is inserted into the joint body 1.

[0034] In this embodiment, the diameter of the threaded tube 21 is equal to the aperture of the connecting hole 23, and they rotate relative to each other through a rotating component; a screw nut 22 with a hexagonal screwing portion is provided in the middle component of the threaded tube 21, and a hose reel is threadedly connected to one end of the threaded tube 21 away from the connector body 1.

[0035] See also Figure 3 to Figure 4The replacement component 3 in this embodiment includes a ball 31 and a sealing ring 32. A replacement channel 33 is opened inside the joint body 1. The ball 31 is rotatably connected to the inner wall of the replacement channel 33. A channel for replacing and filling the ball 31 is provided on the joint body 1. The joint body 1 rolls relative to the threaded tube 21 through the ball 31. The pipeline is screwed into the joint body 1 through the threaded through hole 24. A sealing groove 34 is opened at the connection between the joint body 1 and the threaded tube 21, and the sealing ring 32 is clamped on the inner wall of the sealing groove 34. A sealing ring 32 is provided at the connection between the joint body 1 and the threaded tube 21, and the threaded tube 21 can rotate along the sealing ring 32.

[0036] It should be noted that, by using a combination of the ball 31 and the sealing ring 32, the sealing effect of the joint is improved, the risk of leakage of the fluid medium during the transmission process is reduced, and the positioning accuracy of the rotary joint is improved.

[0037] In this embodiment, a filling channel 35 is provided on the inner wall of the replacement channel 33, which passes through and extends to the outside of the joint body 1, and the aperture of the filling channel 35 is equal to the diameter of the ball 31. The number of balls 31 is not less than two. The rotating connection design of the ball 31 reduces the friction of the rotary joint during operation, improves the flexibility and efficiency of rotation, and is evenly distributed on the inner wall of the replacement channel 33. The evenly distributed ball 31 design helps to reduce the wear of a single ball 31 and extend the service life of the rotary joint. The design of the screw cover 36 can prevent dust and other contaminants from entering the interior of the joint and protect the internal components from damage. An internal thread is provided on the inner wall of the filling channel 35, and the inner wall of the filling channel 35 is threadedly connected with a screw cover 36. The cross-sectional shape of the screw cover 36 is T-shaped. A sealing ring 32 is provided at the connection between the joint body 1 and the threaded tube 21. The threaded tube 21 can rotate along the sealing ring 32. The wear of the threaded tube 21 and the joint body 1 is reduced by a rubber pad, thereby increasing the service life. The ball 31 can be supplemented and replaced through the channel without disassembly, which is convenient for maintenance.

[0038] The working principle of the above embodiment is:

[0039] The connector body 1 is a cylindrical body with one end penetrating therethrough, and a threaded through hole 24 for accessing the pipeline is provided on the surface of the connector body 1; the threaded end of the threaded tube 21 can be screwed onto the hose reel, and the other end is inserted into the connector body 1, and they rotate relatively through a rotating part; a screwing nut 22 with a hexagonal screwing portion is provided on the middle part of the threaded tube 21, and a channel for replacing and filling the ball 31 is provided on the connector body 1, and the connector body 1 rolls relative to the threaded tube 21 through the ball 31; the pipeline is screwed into the connector body 1 through the threaded through hole 24, and a sealing ring 32 is provided at the connection between the connector body 1 and the threaded tube 21, and the threaded tube 21 can rotate along the sealing ring 32, and the wear of the threaded tube 21 and the connector body 1 is reduced by a rubber gasket, thereby increasing the service life; the ball 31 can be supplemented and replaced through the channel, and does not need to be disassembled, which is convenient for maintenance.

Claims

1. A rotary joint, comprising a joint body (1), characterized in that: The inner wall of the joint body (1) is provided with a connection component (2), and the interior of the joint body (1) is provided with a replacement component (3); The connection assembly (2) comprises a threaded tube (21) and a screw nut (22); a connection hole (23) is provided on the inner wall of the joint body (1); the bottom of the threaded tube (21) is plugged into the inner wall of the connection hole (23); the screw nut (22) is threadedly connected to the outer side of the threaded tube (21); and a threaded through hole (24) is provided on the outer side of the joint body (1).

2. A rotary joint according to claim 1, characterized in that: The diameter of the threaded tube (21) is equal to the diameter of the connecting hole (23).

3. A rotary joint according to claim 1, characterized in that: One end of the threaded pipe (21) away from the joint body (1) is threadedly connected to a pipe reel.

4. A rotary joint according to claim 1, characterized in that: The replacement assembly (3) comprises a ball (31) and a sealing ring (32); a replacement channel (33) is provided inside the joint body (1); the ball (31) is rotatably connected to the inner wall of the replacement channel (33); a sealing groove (34) is provided at the connection between the joint body (1) and the threaded tube (21); and the sealing ring (32) is clamped on the inner wall of the sealing groove (34).

5. A rotary joint according to claim 4, characterized in that: The inner wall of the replacement channel (33) is provided with a filling channel (35) penetrating through and extending to the outside of the joint body (1), and the hole diameter of the filling channel (35) is equal to the diameter of the ball (31).

6. A rotary joint according to claim 4, characterized in that: The number of the balls (31) is no less than two and they are evenly distributed on the inner wall of the replacement channel (33).

7. A rotary joint according to claim 5, characterized in that: An inner wall of the filling channel (35) is provided with an internal thread, and a screw cap (36) is threadedly connected to the inner wall of the filling channel (35).

8. A rotary joint according to claim 7, characterized in that: The cross-sectional shape of the rotary cover (36) is T-shaped.

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