Rotary joint

Abstract

The utility model relates to a rotary joint. The rotary joint comprises a shell and a central pipe, the central pipe is rotationally installed at one end of the shell through a bearing, a joint is arranged at the end, away from the central pipe, of the shell, an overflowing channel communicating the joint with the central pipe is formed in the shell, and the central pipe is sleeved with a first sealing sleeve; the inner wall of the first sealing sleeve is in sealing fit with the outer wall of the center pipe, the outer wall of the first sealing sleeve is in sealing fit with the flow passing channel, a first sealing ring matched with the flow passing channel is embedded in the outer wall of the first sealing sleeve, and a plurality of first grooves distributed in the circumferential direction are formed in the inner wall of the first sealing sleeve. A first wear-resisting piece tightly attached to the outer wall of the center pipe is arranged in the first groove, and a first compression spring for compressing the first wear-resisting piece on the center pipe is arranged in the first groove. And by arranging the wear-resisting piece, the wear-resisting performance of the sealing face between the center pipe and the first sealing sleeve is improved, the service life is prolonged, and the use safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to lithium hexafluorophosphate production technical field, specifically related to a rotary joint. BACKGROUND

[0002] The rotary joint is a kind of closed rotary connector that can rotate 360 degrees and transport medium, and its application field covers multiple production and manufacturing industries, and is commonly used for transporting steam, water, oil, gas, air and other gases or liquids.

[0003] The existing rotary joint generally includes a shell and a rotating shaft slidingly inserted into the shell, and the medium is transported into the shell, so that the medium can enter the equipment components connected with the rotating shaft through the rotating rotating shaft, to complete the transportation of the medium. In the use process of the rotary joint, the inner wall of the sealing shell is fixedly connected with the outer wall of the bearing, and the inner wall of the bearing is connected with the outer wall of the center pipe. When the center pipe rotates through the bearing, the center pipe will generate a certain force on the bearing, and the force will be transmitted between the sealing surface of the sealing shell and the center pipe. The existing rotary joint does not adopt wear-resistant treatment for the sealing surface, and the sealing surface between the sealing shell and the center pipe is easy to wear, the sealing performance is reduced, and even leakage occurs. UTILITY MODEL CONTENTS

[0004] In order to solve the above technical problems, the utility model provides a kind of rotary joint.

[0005] The technical scheme of the rotary joint of the utility model is:

[0006] A kind of rotary joint, including shell and center pipe, the center pipe is rotatably installed in one end of shell by bearing, the one end of shell away from center pipe is equipped with joint, the shell is equipped with the flow passage that is connected with the center pipe in the center pipe, the first sealing sleeve is set on the center pipe, the inner wall of the first sealing sleeve is sealed with the outer wall of the center pipe, the outer wall of the first sealing sleeve is sealed with the flow passage, the first sealing ring matched with the flow passage is embedded on the outer wall of the first sealing sleeve, the first recess is arranged on the inner wall of the first sealing sleeve, the first wear plate is tightly attached to the outer wall of the center pipe in the first recess, the first compression spring is arranged in the first recess, and the first wear plate is pressed on the center pipe.

[0007] Further, the shell includes a cylindrical body and a sealing cover fixedly connected to one end of the body by a bolt, the flow passage is arranged in the body, and the center pipe is coaxially arranged on the sealing cover through a sealing ring.

[0008] Further, the overcurrent passage comprises a first passage coaxial with the body, a second passage and a third passage, two ends of the third passage are communicated with the first passage and the second passage respectively, the center pipe is located in the second passage, the joint is fixedly connected at the end of the first passage, the third passage has a plurality of third passages which are uniformly and circumferentially arranged along the body.

[0009] Further, the second sealing sleeve is arranged on the center pipe, the inner wall of the second sealing sleeve is sealingly matched with the outer wall of the center pipe, the outer wall of the second sealing sleeve is sealingly matched with the overcurrent passage, the second sealing ring matched with the overcurrent passage is embedded on the outer wall of the second sealing sleeve, the second grooves arranged along the circumference are arranged on the inner wall of the second sealing sleeve, the second wear-resistant sheets tightly attached to the outer wall of the center pipe are arranged in the second grooves, the second compression springs for compressing the second wear-resistant sheets on the center pipe are arranged in the second grooves, and the second sealing sleeve is located on the side of the first sealing sleeve close to the sealing cover.

[0010] Further, the center pipe is rotatably installed on the body through two bearings, the two bearings are located in the cavity between the first sealing sleeve and the second sealing sleeve, the upper side of the body is provided with the oil inlet oil channel communicated with the cavity between the first sealing sleeve and the second sealing sleeve, the lower side of the body is provided with the oil discharge oil channel communicated with the cavity between the first sealing sleeve and the second sealing sleeve, the oil nozzle is arranged on the oil inlet of the oil inlet oil channel, and the oil discharge bolt is arranged on the oil discharge of the oil discharge oil channel.

[0011] Further, the sealing gasket is arranged on the center pipe, the sealing gasket is located on the side of the second sealing sleeve close to the sealing cover, the inner wall of the sealing gasket is sealingly matched with the center pipe, and the outer wall of the sealing gasket is sealingly matched with the inner wall of the second passage.

[0012] The utility model provides a rotary joint, compared with prior art, its beneficial effects are:

[0013] The utility model discloses a rotary joint, compared with prior art, its beneficial effects are: BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1This is a schematic diagram of the structure of the rotary joint of this utility model;

[0015] Figure 2 This is a partial structural schematic diagram of the rotary joint of this utility model;

[0016] In the diagram: 1. Body; 2. Sealing cap; 3. Connector; 4. First channel; 5. Second channel; 6. Third channel; 7. Oil inlet channel; 8. Oil nozzle; 9. Oil drain channel; 10. Oil drain bolt; 11. Central tube; 12. Bearing; 13. First sealing sleeve; 14. First sealing ring; 15. First groove; 16. First wear-resistant plate; 17. First compression spring; 18. Second sealing sleeve; 19. Second sealing ring; 20. Second groove; 21. Second wear-resistant plate; 22. Second compression spring; 23. Sealing gasket; 24. Sealing ring. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0018] Specific embodiments of the rotary joint of this utility model are as follows: Figure 1 , Figure 2 As shown, the device includes a housing and a central tube 11. The central tube 11 is rotatably mounted on one end of the housing via a bearing 12. A connector 3 is provided at the end of the housing away from the central tube 11. A flow channel connecting the connector 3 and the central tube 11 is provided inside the housing. A first sealing sleeve 13 is fitted on the central tube 11. The inner wall of the first sealing sleeve 13 is sealed to the outer wall of the central tube 11. The outer wall of the first sealing sleeve 13 is sealed to the flow channel. A first sealing ring 14 matching the flow channel is embedded on the outer wall of the first sealing sleeve 13. Several first grooves 15 arranged circumferentially are provided on the inner wall of the first sealing sleeve 13. A first wear-resistant plate 16 is provided in the first groove 15 and is in close contact with the outer wall of the central tube 11. A first compression spring 17 is provided in the first groove 15 to press the first wear-resistant plate 16 onto the central tube 11.

[0019] The shell comprises a cylindrical body 1 and a sealing cover 2 fixedly connected to one end of the body 1, a flow passage is arranged in the body 1, and a central pipe 11 is coaxially arranged on the sealing cover 2 through a sealing ring 24. The flow passage comprises a first passage 4 coaxial with the body 1, a second passage 5 and a plurality of third passages 6, the two ends of the third passage 6 are communicated with the first passage 4 and the second passage 5 respectively, the central pipe 11 is located in the second passage 5, a joint 3 is fixedly connected to the end of the first passage 4, and the plurality of third passages 6 are uniformly and circumferentially arranged along the body 1. The second sealing sleeve 18 is sleeved on the central pipe 11, the inner wall of the second sealing sleeve 18 is sealingly matched with the outer wall of the central pipe 11, the outer wall of the second sealing sleeve 18 is sealingly matched with the flow passage, the second sealing sleeve 18 is embedded with a second sealing ring 19 matched with the flow passage on the outer wall, a plurality of second grooves 20 are arranged on the inner wall of the second sealing sleeve 18 in the circumferential direction, a second wear-resistant sheet 21 tightly attached to the outer wall of the central pipe 11 is arranged in the second groove 20, and a second compression spring 22 for pressing the second wear-resistant sheet 21 against the central pipe 11 is arranged in the second groove 20. The second sealing sleeve 18 is located on the side of the first sealing sleeve 13 close to the sealing cover 2.

[0020] The central pipe 11 is rotatably installed on the body 1 through two bearings 12, the two bearings 12 are located in the cavity between the first sealing sleeve 13 and the second sealing sleeve 18, the upper side of the body 1 is provided with an oil inlet channel 7 communicated with the cavity between the first sealing sleeve 13 and the second sealing sleeve 18, the lower side of the body 1 is provided with an oil outlet channel 9 communicated with the cavity between the first sealing sleeve 13 and the second sealing sleeve 18, an oil nozzle 8 is arranged on the oil inlet of the oil inlet channel 7, and an oil outlet bolt 10 is arranged on the oil outlet of the oil outlet channel 9. The sealing gasket 23 is sleeved on the central pipe 11 and located on the side of the second sealing sleeve 18 close to the sealing cover 2, the inner wall of the sealing gasket 23 is sealingly matched with the central pipe 11, and the outer wall of the sealing gasket 23 is sealingly matched with the inner wall of the second passage 5.

[0021] In use, the joint 3 and the central pipe 11 are connected with external pipelines respectively, and the central pipe 11 rotates with the external pipelines. Fluids enter the flow passage through the joint 3 and flow out from the central pipe 11. In the rotation process of the central pipe 11, the first sealing sleeve 13 seals the flow passage and the central pipe 11 to avoid leakage, and the compression spring presses the wear-resistant sheet against the central pipe 11. By arranging the wear-resistant sheet, the wear resistance of the sealing surface between the central pipe 11 and the first sealing sleeve 13 is improved, and the service life and safety in use are improved. By arranging the oil inlet channel 7 and the oil outlet channel 9, the bearings 12 can be lubricated, and the lubricating oil can be conveniently replaced. By arranging the plurality of third passages 6, the impact force of the fluids in the joint 3 on the sealing sleeves in the flow passage is reduced, which is helpful for long-term and stable use of the first sealing sleeve 13.

[0022] The above merely is the preferred embodiment of the present application, and does not limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rotary joint, characterized in that, The device includes a housing and a central tube. The central tube is rotatably mounted on one end of the housing via a bearing. A connector is provided at the end of the housing away from the central tube. A flow channel connecting the connector and the central tube is provided inside the housing. A first sealing sleeve is fitted on the central tube. The inner wall of the first sealing sleeve is in a sealing fit with the outer wall of the central tube, and the outer wall of the first sealing sleeve is in a sealing fit with the flow channel. A first sealing ring matching the flow channel is embedded on the outer wall of the first sealing sleeve. A plurality of first grooves arranged circumferentially are provided on the inner wall of the first sealing sleeve. A first wear-resistant plate is provided in the first groove and is in contact with the outer wall of the central tube. A first compression spring is provided in the first groove to press the first wear-resistant plate onto the central tube.

2. The rotary joint according to claim 1, characterized in that, The outer casing includes a cylindrical body and a sealing cap that is fixedly connected to one end of the body by bolts. The flow channel is disposed inside the body, and the central tube is coaxially disposed on the sealing cap through a sealing ring.

3. The rotary joint according to claim 2, characterized in that, The flow channel includes a first channel, a second channel, and a third channel coaxial with the body. The two ends of the third channel are connected to the first channel and the second channel, respectively. The central tube is located in the second channel. The connector is fixedly connected to the end of the first channel. There are several third channels, and the several third channels are evenly spaced along the circumference of the body.

4. The rotary joint according to claim 3, characterized in that, A second sealing sleeve is fitted onto the central tube. The inner wall of the second sealing sleeve is in a sealing fit with the outer wall of the central tube, and the outer wall of the second sealing sleeve is in a sealing fit with the flow channel. A second sealing ring matching the flow channel is embedded on the outer wall of the second sealing sleeve. A plurality of second grooves are provided on the inner wall of the second sealing sleeve arranged circumferentially. A second wear-resistant plate is provided in the second groove and is in close contact with the outer wall of the central tube. A second compression spring is provided in the second groove to press the second wear-resistant plate onto the central tube. The second sealing sleeve is located on the side of the first sealing sleeve near the sealing cover.

5. The rotary joint according to claim 4, characterized in that, The central tube is rotatably mounted on the body via two bearings, both of which are located in the cavity between the first and second sealing sleeves. The upper side of the body is provided with an oil inlet passage communicating with the cavity between the first and second sealing sleeves, and the lower side of the body is provided with an oil drain passage communicating with the cavity between the first and second sealing sleeves. The oil inlet of the oil inlet passage is provided with an oil nozzle, and the oil drain of the oil drain passage is provided with an oil drain bolt.

6. The rotary joint according to claim 5, characterized in that, A sealing gasket is fitted onto the central tube. The sealing gasket is located on the side of the second sealing sleeve near the sealing cover. The inner wall of the sealing gasket is in a sealing fit with the central tube, and the outer wall of the sealing gasket is in a sealing fit with the inner wall of the second channel.

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