A rotary joint for pipe butt joint

Abstract

The present invention relates to the technical field of rotary joints, and discloses a rotary joint for pipe docking, comprising a first shell, a disassembly mechanism is arranged on the outer side of the first shell, a lubrication mechanism is arranged on the outer side of the first shell, the disassembly mechanism comprises a fixed ring, the inner wall of the fixed ring is fixedly connected to the outer surface of the first shell, the inner wall of the fixed ring is slidably connected to a connecting ring, the inner wall of the connecting ring is fixedly connected to a second shell, and the back of the second shell is in contact with the front of the first shell. The rotary joint for pipe docking can squeeze and contract the second spring when the opening and closing plate moves, and can release the seal on the bottom of the liquid storage cylinder when the opening and closing plate moves, so that the lubricant inside the liquid storage cylinder can enter the flow-pushing tube, and at the same time, the staff pushes the piston forward by moving the column, so that the lubricant inside the flow-pushing tube flows into the surface of the sealed bearing through the flow-pushing tube and the two-way tube at the bottom, so that the sealed bearing can be lubricated conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of rotary joints, in particular to a rotary joint for pipe docking. Background Art

[0002] A rotary joint is a special mechanical sealing device that allows the medium in the pipeline to rotate or reciprocate within a range of 360 degrees while maintaining the sealed transmission of the medium. The main function of a rotary joint is to connect the rotating equipment with the fixed pipeline system to ensure that the medium can be smoothly transported during the rotation of the equipment while preventing leakage. Rotary joints are widely used in various industrial fields. The design of rotary joints usually includes precision bearings, sealing elements and connection structures. These components work together to achieve the sealing and smooth transmission of the medium. The sealing performance of the rotary joint is crucial to the reliability of the entire system, so special attention should be paid to its sealing effect and durability during design and use.

[0003] The invention patent with announcement number CN108131519B discloses a rotary sealing joint for connecting high-temperature and high-pressure moving pipelines, including a ball seat with an axial through hole and a ball head with an axial through hole, and also includes a sealing ring, an extrusion ring, a retaining body, a clamping screw and an elastic retaining ring. Several sealing rings are installed in the ball seat, and the ball seat is initially detachable with a clearance fit; the ball head is installed in the ball seat, and the ball head and the sealing ring are initially clearance fit; the extrusion ring is installed in the ball seat, and the ball seat is clearance fit, and the extrusion ring can act axially on the sealing ring to compress the sealing ring; the retaining body is installed in the ball seat, and the retaining body and the ball seat are threadedly connected; the clamping screw is installed in the retaining body and axially compresses the extrusion ring, so that the sealing ring undergoes elastic-plastic deformation and is tightly attached to the sealing surface to achieve sealing between the ball head and the ball seat; the elastic retaining ring is installed in the ball seat to limit the axial movement of the retaining body.

[0004] The rotary sealing joint structure proposed by the above technical solution can meet the strict sealing requirements under high and low temperature and high and low pressure alternating working conditions, and can realize the relative movement of high temperature and high pressure pipelines, solving the problem of motion connection between high temperature and high pressure pipelines. However, the above technical solution is not convenient for disassembling the rotary joint for maintenance when a failure occurs in the pipeline connection rotary joint. At the same time, during the long-term use of the rotary joint, the bearings inside the rotary joint are prone to wear, and the device is not convenient for regularly adding lubricant to the inside, which easily increases the chance of bearing damage. Summary of the invention

[0005] The object of the present invention is to provide a rotary joint for pipe docking to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A rotary joint for pipe docking, comprising a first shell, wherein a disassembly mechanism and a lubrication mechanism are arranged on the outer side of the first shell;

[0008] The disassembly mechanism comprises a fixing ring, the inner wall of the fixing ring is fixedly connected to the outer surface of the first shell, the inner wall of the fixing ring is slidably connected with a connecting ring, the inner wall of the connecting ring is fixedly connected to the second shell, the back side of the second shell contacts the front side of the first shell, the outer surface of the fixing ring is fixedly connected with four supporting frames, the inner wall of each supporting frame is slidably connected with a connecting column, each group of connecting columns is fixedly connected with a pulling block at one end away from each other, and each group of connecting columns is fixedly connected with a limiting block at one end close to each other, the outer surface of each limiting block is slidably connected to the inner wall of the fixing ring, the outer surface of each limiting block is slidably connected to the inner wall of the connecting ring, the side surface of each group of limiting blocks away from each other is fixedly connected with a first spring, and the end of each group of the first springs away from each other is fixedly connected to the inner wall of the supporting frame, the inner wall of each supporting frame is slidably connected to the limiting frame, the inner wall of the first shell is rotatably connected with a rotating tube, and the outer surface of the rotating tube is slidably connected to the inner wall of the second shell;

[0009] The lubrication mechanism includes a flow-pushing tube, the outer surface of the rotating tube is fixedly connected to two sealed bearings, the outer ring of each sealed bearing is fixedly connected to the inner wall of the first shell, the outer surface of the flow-pushing tube is fixedly connected to a liquid storage cylinder, the bottom end of the flow-pushing tube is fixedly connected to a two-way tube, the outer surface of the two-way tube is fixedly connected to a sealing sleeve, the outer surface of the sealing sleeve is fixedly connected to the inner wall of the first shell, the inner wall of the flow-pushing tube is slidably connected to a moving column, the back side of the moving column is fixedly connected to a push block, the front side of the moving column is fixedly connected to a piston, the outer surface of the piston is slidably connected to the inner wall of the flow-pushing tube, the inner wall of the flow-pushing tube is slidably connected to an opening and closing plate, the back side of the opening and closing plate is fixedly connected to two second springs, one end of each second spring away from the closing plate is fixedly connected to the inner wall of the flow-pushing tube, and the upper surface of the opening and closing plate contacts the bottom end of the liquid storage cylinder.

[0010] Preferably, a first flange is fixedly connected to the back side of the rotating tube, and six first bolts are threadedly connected to the inner wall of the first flange.

[0011] Preferably, a second flange is fixedly connected to the front side of the second shell, and six second bolts are threadedly connected to the inner wall of the second flange.

[0012] Preferably, a fixing block is fixedly connected to the outer surface of the flow-pushing tube, and the outer surface of the fixing block is fixedly connected to the outer surface of the first shell.

[0013] Preferably, a first sealing gasket is fixedly connected to the inner wall of the second outer shell, and the inner wall of the first sealing gasket is in contact with the outer surface of the rotating tube.

[0014] Preferably, a sealing ring is fixedly connected to the inner wall of the first shell, and the inner wall of the sealing ring is in contact with the outer surface of the rotating tube.

[0015] Preferably, two second sealing gaskets are fixedly connected to the outer surface of each of the sealed bearings, and the inner wall of each of the second sealing gaskets is in contact with the outer surface of the rotating tube.

[0016] Preferably, a plug is slidably connected to the inner wall of the liquid storage cylinder, and a pull ring is fixedly connected to the upper surface of the plug.

[0017] Preferably, the outer surface of the liquid storage cylinder is fixedly connected to a limiting ring, and the outer surface of the limiting ring is fixedly connected to the outer surface of the plug flow tube.

[0018] Preferably, the outer surface of the first shell is fixedly connected to a drain pipe, and the inner wall of the drain pipe is threadedly connected to a threaded head.

[0019] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0020] When the staff manually pulls the pull block, the pull block can move upward, and in the process of moving the pull block, the connecting column can be driven to rise, and when the connecting column rises, the limit block below can be driven to rise until the limit block can move out of the interior of the fixed ring and the connecting ring, thereby releasing the limiting effect between the fixed ring and the connecting ring, and in the process of rising of the limit block, the first spring can be squeezed, and after the pull block is raised to a suitable height, the staff can move by pushing the limit frame, so that the limit frame can be stuck on the surface of the pull block, avoiding the rebound of the pull block and the limit block, thereby facilitating the disassembly of the first shell and the second shell, and thus facilitating maintenance work.

[0021] Secondly, the present invention, by providing a flow-pushing tube, a liquid storage cylinder, a two-way tube, a movable column, a piston, an opening and closing plate, a push block and a second spring, plays a role in which the lubricant to be used is stored under the action of the liquid storage cylinder. At the same time, the staff manually pulls the push block, and the movement of the push block can drive the movable column to move. During the movement of the movable column, the piston on the surface can be driven to move. When the piston moves backward, the opening and closing plate at the rear can be pushed to move. When the opening and closing plate moves, the second spring can be squeezed and contracted. When the opening and closing plate moves, the seal on the bottom of the liquid storage cylinder can be released, so that the lubricant inside the liquid storage cylinder can enter the flow-pushing tube. At the same time, the staff pushes the piston forward through the mobile column, so that the lubricant inside the flow-pushing tube flows into the surface of the sealed bearing through the flow-pushing tube and the two-way tube at the bottom, thereby facilitating the lubrication of the sealed bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the three-dimensional structure of the first housing in an embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of the three-dimensional structure of the second housing in an embodiment of the present invention;

[0024] Figure 3 It is a schematic diagram of a three-dimensional structure of a cross-section of a support frame in an embodiment of the present invention;

[0025] Figure 4 is a schematic diagram of a three-dimensional structure of a cross-section of a second housing in an embodiment of the present invention;

[0026] Figure 5 It is a schematic diagram of a three-dimensional structure of a cross-section of a first housing in an embodiment of the present invention;

[0027] Figure 6 Schematic diagram of the three-dimensional structure of the plug flow tube in the embodiment of the present invention;

[0028] Figure 7 It is a schematic diagram of the three-dimensional structure of the thrust flow tube in the embodiment of the present invention, viewed from the left.

[0029] Wherein: 1. first shell; 2. disassembly mechanism; 201. fixing ring; 202. second shell; 203. connecting ring; 204. supporting frame; 205. rotating tube; 206. connecting column; 207. pulling block; 208. limiting block; 209. first spring; 210. limiting frame; 3. lubricating mechanism; 301. flow tube; 302. sealing bearing; 303. liquid storage cylinder; 304. two-way pipe; 305. sealing sleeve; 306. moving column; 307. piston; 308. opening and closing plate; 309. second spring; 310. pushing block; 4. first flange; 5. first bolt; 6. second flange; 7. second bolt; 8. fixing block; 9. first sealing gasket; 10. sealing ring; 11. second sealing gasket; 12. plug; 13. pulling ring; 14. limiting ring; 15. drain pipe; 16. threaded head. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1

[0032] See also Figure 1-Figure 7 The present embodiment provides a rotary joint for pipe docking, comprising a first shell 1, a disassembly mechanism 2 is arranged on the outer side of the first shell 1, and a lubrication mechanism 3 is arranged on the outer side of the first shell 1; the disassembly mechanism 2 comprises a fixing ring 201, the inner wall of the fixing ring 201 is fixedly connected to the outer surface of the first shell 1, the inner wall of the fixing ring 201 is slidably connected to a connecting ring 203, the inner wall of the connecting ring 203 is fixedly connected to a second shell 202, the back side of the second shell 202 is in contact with the front side of the first shell 1, the outer surface of the fixing ring 201 is fixedly connected to four supporting frames 204, the inner wall of each supporting frame 204 is slidably connected to a connecting column 206, and each group of connecting columns 206 is far away from one end from each other. They are all fixedly connected with a pulling block 207, and the end of each group of connecting columns 206 that is close to each other is fixedly connected with a limiting block 208, the outer surface of each limiting block 208 is slidably connected to the inner wall of the fixing ring 201, and the outer surface of each limiting block 208 is slidably connected to the inner wall of the connecting ring 203, and the side of each group of limiting blocks 208 that is away from each other is fixedly connected with a first spring 209, and the end of each group of first springs 209 that is away from each other is fixedly connected to the inner wall of the support frame 204, and the inner wall of each support frame 204 is slidably connected to the limiting frame 210, and the inner wall of the first shell 1 is rotatably connected with a rotating tube 205, and the outer surface of the rotating tube 205 is slidably connected to the inner wall of the second shell 202.

[0033] The back of the rotating tube 205 is fixedly connected with a first flange 4, and the inner wall of the first flange 4 is threadedly connected with six first bolts 5. By providing the first flange 4 and the first bolts 5, it is easy to connect with one end of the pipeline for rotation, thereby facilitating rotational connection.

[0034] The front of the second shell 202 is fixedly connected with a second flange 6, and the inner wall of the second flange 6 is threadedly connected with six second bolts 7. By providing the second flange 6 and the second bolts 7, it can be conveniently connected to the fixed end of the pipeline, thereby facilitating transportation.

[0035] The inner wall of the second shell 202 is fixedly connected with a first sealing gasket 9, and the inner wall of the first sealing gasket 9 contacts the outer surface of the rotating tube 205. By providing the first sealing gasket 9, the sealing between the second shell 202 and the rotating tube 205 can be increased to avoid leakage.

[0036] A sealing ring 10 is fixedly connected to the inner wall of the first shell 1, and the inner wall of the sealing ring 10 contacts the outer surface of the rotating tube 205. By providing the sealing ring 10, the sealing between the first shell 1 and the rotating tube 205 can be increased to avoid leakage during use.

[0037] Two second sealing gaskets 11 are fixedly connected to the outer surface of each sealing bearing 302, and the inner wall of each second sealing gasket 11 is in contact with the outer surface of the rotating tube 205. By providing the second sealing gaskets 11, the sealing performance between the sealing bearing 302 and the rotating tube 205 can be further improved to avoid penetration.

[0038] The specific implementation method of this embodiment is as follows: first, the staff takes the device to a suitable use position, and then connects the swivel joint for use. When the swivel joint fails and needs to be disassembled, the staff first manually pulls the pull block 207, and the pull block 207 can move upward. During the movement of the pull block 207, the connecting column 206 can be driven to rise. When the connecting column 206 rises, the limit block 208 below can be driven to rise until the limit block 208 can move out of the interior of the fixing ring 201 and the connecting ring 203, thereby releasing the limiting effect between the fixing ring 201 and the connecting ring 203, and the limit block 208 can squeeze the first spring 209 during the rising process. At the same time, after the pull block 207 is raised to a suitable height, the staff pushes the limit frame 210 to move, so that the limit frame 210 can be stuck on the surface of the pull block 207 to avoid the rebound of the pull block 207 and the limit block 208, so that the first shell 1 and the second shell 202 can be easily disassembled, and then maintenance work can be facilitated.

[0039] Embodiment 2

[0040] See also Figure 1-Figure 7 The present embodiment provides a rotary joint for pipe docking. On the basis of the first embodiment, the lubrication mechanism 3 includes a flow-pushing tube 301. Two sealing bearings 302 are fixedly connected to the outer surface of the rotating tube 205. The outer ring of each sealing bearing 302 is fixedly connected to the inner wall of the first shell 1. The outer surface of the flow-pushing tube 301 is fixedly connected to a liquid storage cylinder 303. The bottom end of the flow-pushing tube 301 is fixedly connected to a two-way tube 304. The outer surface of the two-way tube 304 is fixedly connected to a sealing sleeve 305. The outer surface of the sealing sleeve 305 is fixedly connected to the inner wall of the first shell 1. The flow-pushing tube 301 is fixedly connected to the inner wall of the first shell 1. The inner wall of 301 is slidably connected with a moving column 306, the back of the moving column 306 is fixedly connected with a push block 310, the front of the moving column 306 is fixedly connected with a piston 307, the outer surface of the piston 307 is slidably connected to the inner wall of the flow-pushing tube 301, the inner wall of the flow-pushing tube 301 is slidably connected with an opening and closing plate 308, the back of the opening and closing plate 308 is fixedly connected with two second springs 309, one end of each second spring 309 away from the closing plate 308 is fixedly connected to the inner wall of the flow-pushing tube 301, and the upper surface of the opening and closing plate 308 is in contact with the bottom end of the liquid storage cylinder 303.

[0041] The outer surface of the push flow tube 301 is fixedly connected with a fixing block 8, and the outer surface of the fixing block 8 is fixedly connected to the outer surface of the first shell 1. By setting the fixing block 8, the stability effect of the push flow tube 301 can be further increased, so that it can be in a stable power-on state and avoid shaking during use.

[0042] The inner wall of the liquid storage cylinder 303 is slidably connected with a plug 12, and the upper surface of the plug 12 is fixedly connected with a pull ring 13. By providing the plug 12 and the pull ring 13, it is convenient for the staff to open and close the liquid storage cylinder 303, so that it is convenient to observe the situation inside the liquid storage cylinder 303, and it is also convenient for the staff to add lubricant to the inside of the liquid storage cylinder 303.

[0043] The outer surface of the liquid storage cylinder 303 is fixedly connected to a limiting ring 14, and the outer surface of the limiting ring 14 is fixedly connected to the outer surface of the flow tube 301. By setting the limiting ring 14, the stability of the liquid storage cylinder 303 during use can be further increased to avoid falling during use, so that it can be used firmly and stably.

[0044] The outer surface of the first shell 1 is fixedly connected with a drain pipe 15, and the inner wall of the drain pipe 15 is threadedly connected with a thread head 16. By providing the drain pipe 15 and the thread head 16, the lubricant used for a long time can be easily discharged, and then it can be easily added and replaced.

[0045] The specific implementation of this embodiment is as follows: when the staff needs to lubricate the sealed bearing 302, the staff first removes the plug 12, and then injects an appropriate amount of lubricant into the liquid storage cylinder 303, and then the staff manually pulls the push block 310. The movement of the push block 310 can drive the moving column 306 to move, and during the movement of the moving column 306, the piston 307 on the surface can be driven to move, and when the piston 307 moves backward, the rear opening and closing plate 308 can be pushed to move, and when the opening and closing plate 308 moves, the second spring 309 can be squeezed and contracted, and when the opening and closing plate 308 moves, the seal on the bottom of the liquid storage cylinder 303 can be released, so that the lubricant inside the liquid storage cylinder 303 can enter the plug flow tube 301, and at the same time, the staff pushes the piston 307 forward through the moving column 306, so that the lubricant inside the plug flow tube 301 flows into the surface of the sealed bearing 302 through the plug flow tube 301 and the two-way pipe 304 at the bottom, thereby facilitating the lubrication of the sealed bearing 302.

[0046] The working principle of the present invention is as follows: first, the staff connects and fixes the first flange 4 and the second flange 6 for use. When the staff needs to lubricate the sealed bearing 302, the staff first removes the plug 12, and then injects a proper amount of lubricant into the liquid storage cylinder 303. Then, the staff manually pulls the push block 310, and the movement of the push block 310 can drive the moving column 306 to move. During the movement of the moving column 306, the piston 307 on the surface can be driven to move, and when the piston 307 moves backward, it can push the rear opening and closing plate. When the opening and closing plate 308 moves, the second spring 309 can be squeezed and contracted, and the seal on the bottom of the liquid storage cylinder 303 can be released when the opening and closing plate 308 moves. At the same time, a strong sealing pad is provided on the surface of the opening and closing plate 308, so that it can better seal with the bottom of the liquid storage cylinder 303 to avoid leakage of the lubricant inside the liquid storage cylinder 303 when not in use. Then the lubricant inside the liquid storage cylinder 303 can enter the plug flow tube 301, and at the same time, the staff pushes the piston 307 forward by moving the column 306, so that the plug flow tube 301 01 The lubricant inside flows into the surface of the sealed bearing 302 through the push flow pipe 301 and the two-way pipe 304 at the bottom, so that the sealed bearing 302 can be lubricated conveniently. When the rotary joint fails and needs to be disassembled, the staff manually pulls the pull block 207, and the pull block 207 can move upward. During the movement of the pull block 207, the connecting column 206 can be driven to rise. When the connecting column 206 rises, the limit block 208 below can be driven to rise until the limit block 208 can move out of the fixing ring 201 and The interior of the connecting ring 203 can release the limiting effect between the fixing ring 201 and the connecting ring 203, and the limiting block 208 can squeeze the first spring 209 during the rising process. At the same time, after the pull block 207 is raised to a suitable height, the staff pushes the limiting frame 210 to move so that the limiting frame 210 can be stuck on the surface of the pull block 207 to avoid the pull block 207 and the limiting block 208 from rebounding, so that the first shell 1 and the second shell 202 can be easily disassembled, and then it is convenient to carry out maintenance work.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rotary joint for pipe docking, comprising a first housing (1), characterized in that: A disassembly mechanism (2) and a lubrication mechanism (3) are provided on the outer side of the first housing (1); The disassembly mechanism (2) comprises a fixing ring (201), the inner wall of the fixing ring (201) is fixedly connected to the outer surface of the first shell (1), the inner wall of the fixing ring (201) is slidably connected to a connecting ring (203), the inner wall of the connecting ring (203) is fixedly connected to the second shell (202), the back surface of the second shell (202) is in contact with the front surface of the first shell (1), the outer surface of the fixing ring (201) is fixedly connected to four support frames (204), the inner wall of each support frame (204) is slidably connected to a connecting column (206), each group of the connecting columns (206) is fixedly connected to a pull block (207) at one end away from each other, and each group of the connecting columns (206) is fixedly connected to one end close to each other. The first outer shell (1) is rotatably connected to a rotating tube (205), and the outer surface of the rotating tube (205) is rotatably connected to the inner wall of the second outer shell (202); the first outer shell (1 ... first outer shell (204); the first outer shell (1) is rotatably connected to the inner wall of the second outer shell (202); the first outer shell (1) is rotatably connected to the inner wall of the first outer shell (204); the first outer shell (205) is rotatably connected to the inner wall of the second outer shell (202); the first outer shell (1) is rotatably connected to the inner wall of the first outer shell (204); the first outer shell (205) is rotatably connected to the inner wall of the second outer shell (202); the first outer shell (208) is rotatably connected to the inner wall of the second outer shell (202); the first outer shell (208) is rotatably connected to the inner wall of the first outer shell (204); the first outer shell (208) is rotatably connected to the inner wall of the second outer shell (202); the first outer shell (208) is rotatably connected to the inner wall of the second outer shell (202); the first outer shell (208) is rot The lubricating mechanism (3) comprises a flow-pushing tube (301), the outer surface of the rotating tube (205) is fixedly connected to two sealed bearings (302), the outer ring of each sealed bearing (302) is fixedly connected to the inner wall of the first housing (1), the outer surface of the flow-pushing tube (301) is fixedly connected to a liquid storage cylinder (303), the bottom end of the flow-pushing tube (301) is fixedly connected to a two-way tube (304), the outer surface of the two-way tube (304) is fixedly connected to a sealing sleeve (305), the outer surface of the sealing sleeve (305) is fixedly connected to the inner wall of the first housing (1), and the inner wall of the flow-pushing tube (301) is slidably connected to a moving column (306), a push block (310) is fixedly connected to the back of the movable column (306), a piston (307) is fixedly connected to the front of the movable column (306), an outer surface of the piston (307) is slidably connected to the inner wall of the flow-pushing tube (301), an opening and closing plate (308) is slidably connected to the inner wall of the flow-pushing tube (301), two second springs (309) are fixedly connected to the back of the opening and closing plate (308), one end of each second spring (309) away from the closing plate (308) is fixedly connected to the inner wall of the flow-pushing tube (301), and an upper surface of the opening and closing plate (308) is in contact with the bottom end of the liquid storage cylinder (303); The push block (310) is pulled, and the movement of the push block (310) can drive the moving column (306) to move. During the movement of the moving column (306), the piston (307) can be driven to move. When the piston (307) moves backward, the rear opening and closing plate (308) can be pushed to move. When the opening and closing plate (308) moves, the second spring (309) can be squeezed and contracted. When the opening and closing plate (308) moves, the seal on the bottom of the liquid storage cylinder (303) can be released, and the lubricant inside the liquid storage cylinder (303) can enter the flow-pushing tube (301). At the same time, the piston (307) is pushed forward by the moving column (306), so that the lubricant inside the flow-pushing tube (301) can flow into the surface of the sealed bearing (302) through the flow-pushing tube (301) and the double-pass tube (304) at the bottom.

2. A pipe joint rotary joint according to claim 1, characterized in that: A first flange (4) is fixedly connected to the back side of the rotating tube (205), and six first bolts (5) are threadedly connected to the inner wall of the first flange (4).

3. A pipe joint rotary joint according to claim 1, characterized in that: A second flange (6) is fixedly connected to the front side of the second housing (202), and six second bolts (7) are threadedly connected to the inner wall of the second flange (6).

4. A pipe joint rotary joint according to claim 1, characterized in that: The outer surface of the flow-pushing tube (301) is fixedly connected to a fixing block (8), and the outer surface of the fixing block (8) is fixedly connected to the outer surface of the first housing (1).

5. A pipe joint rotary joint according to claim 1, characterized in that: A first sealing gasket (9) is fixedly connected to the inner wall of the second outer shell (202), and the inner wall of the first sealing gasket (9) is in contact with the outer surface of the rotating tube (205).

6. A pipe joint rotary joint according to claim 1, characterized in that: A sealing ring (10) is fixedly connected to the inner wall of the first housing (1), and the inner wall of the sealing ring (10) is in contact with the outer surface of the rotating tube (205).

7. A pipe joint rotary joint according to claim 1, characterized in that: Two second sealing pads (11) are fixedly connected to the inner surface of each of the sealed bearings (302), and the inner wall of each of the second sealing pads (11) is in contact with the outer surface of the rotating tube (205).

8. The pipe joint rotary joint according to claim 1, characterized in that: A plug (12) is slidably connected to the inner wall of the liquid storage cylinder (303), and a pull ring (13) is fixedly connected to the upper surface of the plug (12).

9. The pipe joint rotary joint according to claim 1, characterized in that: The outer surface of the liquid storage cylinder (303) is fixedly connected to a limit ring (14), and the outer surface of the limit ring (14) is fixedly connected to the outer surface of the flow-pushing tube (301).

10. The pipe joint rotary joint according to claim 1, characterized in that: The outer surface of the first housing (1) is fixedly connected to a drainage pipe (15), and the inner wall of the drainage pipe (15) is threadedly connected to a threaded head (16).

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