Totally-closed self-circulation type liquid rotating joint and using method

Abstract

The invention relates to the technical field of auxiliary equipment of electronic equipment, in particular to a totally-closed self-circulation type liquid rotating joint and a using method, and the totally-closed self-circulation type liquid rotating joint comprises a rotating joint body, a rotating joint sealing assembly, a liquid supply assembly, an overflow cavity assembly, a liquid circulation pipeline assembly, an overflow centralized conveying pipe set and an overflow return part. The liquid circulation pipeline assembly is connected with the overflow cavity assembly, leaked cooling liquid is sent out of the rotary joint body through the liquid circulation pipeline assembly, the cooling liquid sent out by the liquid circulation pipeline assembly is sent back into the liquid circulation channel through the overflow circulation connecting part, waste of the cooling liquid is reduced, site pollution is avoided, and the working efficiency is improved. The maintenance cost is reduced, the potential safety hazard during use is reduced, and the use convenience of the device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of electronic equipment auxiliary equipment, and in particular to a fully enclosed self-circulating liquid rotary joint and a use method thereof. Background Art

[0002] The technical system of modern electronic equipment is constantly updated and developed. Electronic equipment is gradually developing towards large arrays and big data. Therefore, the requirements for the transmission power of electronic equipment are getting higher and higher. Traditional air cooling can no longer meet the cooling requirements of large electronic equipment. Liquid cooling is required to cool the electronic equipment array. With the widespread application of liquid-cooled electronic equipment, the joint body has become an indispensable and important part of electronic equipment. The joint body (also known as water hinge) plays the role of rotational transmission in the electronic equipment cooling system, completes the supply and recovery of coolant between the electronic equipment ground equipment and the electronic equipment antenna array, and ensures the circulation of coolant. The stability of the performance of the joint body is related to the overall performance of the electronic equipment cooling system.

[0003] At present, the joint body dynamic seal mostly adopts end face seal (i.e. mechanical seal). Mechanical seal has the advantages of reliable performance, low leakage rate and long service life, which is suitable for the sealing requirements of harsh working conditions in the production process. However, due to the limitation of the sealing mechanism, the mechanical seal used in the joint body will inevitably have certain leakage during operation. For the coolant, there are currently four main treatment methods:

[0004] 1. Drain the coolant directly onto the ground through the overflow pipe and let it evaporate naturally;

[0005] 2. Collect the coolant into a container with a fixed volume;

[0006] 3. Recover the coolant to the water tank of the liquid cooling unit through an overflow pipe of a certain length;

[0007] 4. Recover the leaked coolant to the liquid return line of the liquid cooling line through the leakage recovery device;

[0008] Method 1 has the following problems: the coolant accumulates directly on the ground over time, resulting in a poor user experience, and the coolant splashes everywhere to pollute the environment, making it difficult for users to clean up. As time goes by, the coolant will accumulate and need to be replenished regularly, resulting in a waste of coolant;

[0009] Method 2 has the following problems: the recovery container has a limited volume, and the coolant needs to be checked and drained regularly, which also results in a poor user experience; when the coolant speed suddenly increases, the container may be quickly filled. For open containers, if the coolant is not handled in time, the coolant will overflow and splash everywhere, polluting the environment and making it difficult for users to clean up; for closed containers, if the coolant is not handled in time, the pressure in the container will continue to increase, which may easily cause explosion and bring safety hazards;

[0010] Method 3 has the following problems: currently, most electronic equipment liquid cooling systems use closed systems, and the coolant overflowing from the overflow pipe has no pressure and cannot be directly discharged into a water tank with a certain reserve pressure. The distance between the liquid cooling vehicle and the electronic equipment vehicle is not fixed, and the required overflow pipe may be very long, which causes waste on the one hand, and on the other hand, adding an extra pipe increases the time for setting up and withdrawing the electronic equipment, and weakens the mobility of the electronic equipment. Therefore, in response to the above problems, a fully enclosed self-circulating liquid rotary joint is proposed;

[0011] Method 4 has the following problems: on the one hand, it is necessary to reserve additional space under the liquid rotating joint to install a leakage recovery device, which increases the volume and weight of the entire equipment; on the other hand, the leakage recovery device generally has a complex structure, and contains a water pump, an alarm device, a water tank, etc., and requires additional power supply. The reliability of the leakage recovery device will simultaneously affect the reliability of the entire equipment. Summary of the invention

[0012] In order to solve the technical problems existing in the above-mentioned prior art, the present invention provides a fully enclosed self-circulating liquid rotary joint and a method of use.

[0013] In order to solve the above technical problems, the present invention provides the following technical solutions: a fully enclosed self-circulating liquid rotary joint, comprising a rotary joint body, a rotary joint sealing assembly, a liquid supply assembly, an overflow chamber assembly, a liquid circulation pipeline assembly, an overflow centralized delivery pipe group and an overflow return component;

[0014] The bottom of the rotary joint body is connected to the fixed part of the external electronic device, the top of the rotary joint body is connected to the rotating part of the external electronic device, and the rotating part of the external electronic device rotates with the rotary joint body as the rotation axis;

[0015] The rotary joint sealing assembly is installed at both ends of the rotary joint body, and the rotary joint sealing assembly seals the movable part of the rotary joint body to form a liquid supply cavity and a liquid return cavity in the rotary joint body;

[0016] The liquid supply assembly is installed in the rotary joint body, and the liquid supply assembly is connected with the liquid supply cavity and the liquid return cavity to form a liquid circulation channel;

[0017] The overflow chamber assembly is installed inside the liquid supply chamber and the liquid return chamber, and the overflow chamber assembly is connected and fitted with the rotary joint sealing assembly. The overflow chamber assembly collects the coolant leaked from the rotary joint sealing assembly;

[0018] The liquid circulation pipeline assembly is connected to the overflow chamber assembly, and the liquid circulation pipeline assembly sends the leaked coolant out of the rotary joint body;

[0019] The overflow circulation connecting component returns the cooling liquid sent out by the liquid circulation pipeline assembly to the liquid circulation channel.

[0020] Preferably, the joint body includes an inner ring, an upper outer ring and a lower outer ring, the upper outer ring is axially docked and fixed with the lower outer ring, the upper end of the upper outer ring is rotatably connected to the inner ring via an upper bearing seat, and the lower end of the lower outer ring is rotatably connected to the inner ring via a lower bearing seat.

[0021] Preferably, the rotating joint sealing assembly includes a first dynamic seal, a second dynamic seal, and a third dynamic seal. The first dynamic seal is installed on the side of the upper bearing, the third dynamic seal is installed on the side of the lower bearing, and the second dynamic seal is installed at the connection between the upper outer ring and the lower outer ring. The first dynamic seal, the second dynamic seal, and the upper outer ring cooperate with the inner ring to form a liquid supply cavity, and the second dynamic seal, the third dynamic seal, and the lower outer ring cooperate with the inner ring to form a liquid return cavity.

[0022] Preferably, the liquid supply assembly comprises a liquid inlet pipe, a liquid outlet pipe, a liquid return pipe and a return pipe;

[0023] One end of the liquid inlet pipe is fixed above the inner wall of the inner ring, and the other end of the liquid inlet pipe extends to the outside of the inner ring. The liquid inlet pipe is connected to the liquid supply cavity. The liquid outlet pipe is fixed to the outer wall of the upper outer ring, and the liquid outlet pipe is connected to the liquid supply cavity. The liquid supply cavity, the liquid inlet pipe and the liquid outlet pipe form a liquid flow path 1;

[0024] One end of the liquid return pipe is fixed below the inner wall of the inner ring, and the other end of the liquid return pipe extends to the outside of the inner ring. The liquid return pipe is connected to the liquid return cavity. The return pipe is fixed to the outer wall of the lower outer ring, and the return pipe is connected to the liquid return cavity. The liquid return cavity, the liquid return pipe and the return pipe form a second liquid flow passage.

[0025] Preferably, the overflow chamber assembly includes an upper overflow chamber and a lower overflow chamber, the upper overflow chamber is formed on the side of the first dynamic seal and is connected to the first dynamic seal, and the lower overflow chamber is formed on the side of the third dynamic seal and is connected to the third dynamic seal.

[0026] Preferably, the liquid circulation pipeline assembly includes an upper overflow pipe and a lower overflow pipe, the upper end of the upper overflow pipe is fixed to the upper part of the inner wall of the inner ring, the inner ring is connected to the upper overflow cavity, and the upper end of the lower overflow pipe is fixed to the lower part of the inner wall of the inner ring, and the inner ring is connected to the lower overflow cavity.

[0027] Preferably, the overflow centralized delivery pipe group includes a three-way joint and a first hose, a second hose and a third hose;

[0028] The upper end of the first hose is connected to the lower end of the lower overflow pipe, and the upper end of the second hose is connected to the lower end of the upper overflow pipe;

[0029] The first interface of the three-way joint is connected to the lower end of the first hose, the second interface of the three-way joint is connected to the lower end of the second hose, and the third interface of the three-way joint is connected to the third hose.

[0030] Preferably, the overflow return component includes a return joint, a one-way valve, a safety valve and an adapter;

[0031] The first interface of the reflux joint is connected to the bottom of the return liquid pipe, the one-way valve is connected to the second interface of the reflux joint, the safety valve is connected to the third interface of the reflux joint, one end of the adapter is connected to the bottom end of the third hose, and the other end of the adapter is connected to the one-way valve.

[0032] Preferably, the pressure of the liquid supply cavity is greater than the pressure of the liquid return cavity, the pressure of the liquid supply cavity is greater than the pressure of the upper overflow cavity, the pressure of the liquid return cavity is greater than the pressure at the liquid return pipe, and the pressure of the liquid return cavity is greater than the pressure of the lower overflow cavity.

[0033] A method for using a fully enclosed self-circulating liquid rotary joint comprises the following steps:

[0034] Step S1, connecting the liquid inlet pipe to the supply end of the external coolant supply device, connecting the rotating part of the external electronic device to the liquid outlet pipe through the supply pipeline, connecting the liquid return pipe to the storage end of the external coolant supply device, and connecting the rotating part of the external electronic device to the return pipe through the return pipeline;

[0035] Step S2, the external coolant supply device delivers the coolant into the liquid supply cavity through the liquid inlet pipe and fills the liquid supply cavity, the coolant in the liquid supply cavity enters the supply pipeline of the external electronic device through the liquid outlet pipe under the action of pressure, the coolant is delivered to the cooling system of the external electronic device through the supply pipeline of the external electronic device, the coolant passing through the cooling system of the external electronic device enters the return liquid cavity through the return pipeline and the return pipe after completing the heat exchange, and the coolant entering the return liquid cavity flows back to the storage end of the external coolant supply device through the return liquid pipe;

[0036] Step S3, when the first dynamic seal leaks, the coolant in the liquid supply cavity passes through the first dynamic seal under the action of pressure and enters the upper overflow cavity; when the third dynamic seal leaks, the coolant in the liquid return cavity passes through the third dynamic seal under the action of pressure and enters the lower overflow cavity;

[0037] Step S4, the coolant entering the upper overflow chamber enters the upper overflow pipe and is discharged from the upper overflow chamber through the upper overflow pipe, and the coolant entering the lower overflow chamber enters the lower overflow pipe and is discharged from the lower overflow chamber through the lower overflow pipe;

[0038] Step S5, the cooling liquid entering the upper overflow pipe and the lower overflow pipe is led out from the upper overflow pipe and the lower overflow pipe to the first hose and the second hose, and is further guided and transported to the three-way joint by the first hose and the second hose. Under the action of the three-way joint, the cooling liquid is guided to the one-way valve through the third hose;

[0039] Step S6, the coolant enters the return pipe through the one-way valve under pressure, and flows back to the storage end of the external coolant supply device along the return pipe.

[0040] Compared with the prior art, the beneficial effects of the present invention are:

[0041] The present invention is provided with an overflow chamber assembly, a liquid circulation pipeline assembly, an overflow centralized delivery pipe group and an overflow return component. The liquid circulation pipeline assembly is connected with the overflow chamber assembly. The liquid circulation pipeline assembly delivers overflowed coolant from the rotating joint body. The overflow centralized delivery pipe group cooperates with the overflow return component to return the coolant delivered by the liquid circulation pipeline assembly to the liquid circulation channel, so that the coolant will not be discharged at will, reducing the waste of coolant and avoiding site pollution.

[0042] In the present invention, by guiding the coolant back to the coolant circulation path, it is possible to avoid adding containers or other auxiliary equipment, thereby reducing maintenance costs and potential safety hazards during use.

[0043] In the present invention, the overflow centralized delivery pipe group and the overflow return component for returning the coolant are directly integrated into the rotary joint body and connected to the coolant circulation path. There is no need to add additional pipelines or temporary additions when in use, which improves the convenience of using the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0045] Figure 2 It is a front view cross-sectional structural schematic diagram of the present invention;

[0046] Figure 3 It is a side cross-sectional structural schematic diagram of the present invention;

[0047] Figure 4 It is a schematic diagram of the cooling liquid supply transmission line of the present invention;

[0048] Figure 5 It is a schematic diagram of the leakage cooling liquid return route of the present invention.

[0049] The numbers in the figure represent:

[0050] 1. Rotating joint body; 11. Inner ring; 12. Upper outer ring; 13. Lower outer ring; 2. Rotating joint sealing assembly; 21. First dynamic seal; 211. Upper overflow chamber; 22. Second dynamic seal; 23. Third dynamic seal; 231. Lower overflow chamber; 31. Liquid supply chamber; 32. Liquid return chamber; 4. Liquid supply assembly; 41. Liquid inlet pipe; 42. Liquid outlet pipe; 43. Liquid return pipe; 44. Return pipe; 5. Liquid circulation pipeline assembly; 51. Upper overflow pipe; 52. Lower overflow pipe; 6. Overflow centralized delivery pipe group; 61. Three-way joint; 62. First hose; 63. Second hose; 64. Third hose; 7. Overflow return component; 71. Return joint; 72. One-way valve; 73. Safety valve; 74. Adapter. DETAILED DESCRIPTION

[0051] The present invention will be further described below with reference to the accompanying drawings and embodiments, but the following embodiments are merely preferred embodiments of the present invention and are not exhaustive.

[0052] Example:

[0053] like Figure 1 - Figure 5 As shown, the present invention provides a fully enclosed self-circulating liquid rotary joint, comprising a rotary joint body 1, a rotary joint sealing assembly 2, a liquid supply assembly 4, an overflow chamber assembly, a liquid circulation pipeline assembly 5 and an overflow circulation connecting component;

[0054] The bottom of the rotary joint body 1 is connected to the fixed part of the external electronic device, and the top of the rotary joint body 1 is connected to the rotating part of the external electronic device;

[0055] The rotary joint sealing assembly 2 is installed at both ends of the rotary joint body 1, and the rotary joint sealing assembly 2 seals the movable part of the rotary joint body 1 to form a liquid supply cavity 31 and a liquid return cavity 32 in the rotary joint body 1;

[0056] The liquid supply assembly 4 is installed in the rotary joint body 1, and the liquid supply assembly 4 is connected with the liquid supply cavity 31 and the liquid return cavity 32 to form a liquid circulation channel;

[0057] The overflow chamber assembly is installed inside the liquid supply chamber 31 and the liquid return chamber 32, and the overflow chamber assembly is connected and fitted with the rotary joint sealing assembly 2, and the overflow chamber assembly collects the coolant leaked from the rotary joint body 1;

[0058] The liquid circulation pipeline assembly 5 is connected to the overflow chamber assembly, and the liquid circulation pipeline assembly 5 sends the leaked coolant out of the rotary joint body 1;

[0059] The overflow circulation connection component returns the cooling liquid sent out by the liquid circulation pipeline assembly 5 to the liquid circulation channel.

[0060] The joint body includes an inner ring 11, an upper outer ring 12 and a lower outer ring 13;

[0061] The upper outer ring 12 and the lower outer ring 13 are axially connected and fixed by bolts. The upper end of the upper outer ring 12 is rotatably connected to the inner ring 11 via the upper bearing seat, and the lower end of the lower outer ring 13 is rotatably connected to the inner ring 11 via the lower bearing seat. The upper outer ring 12 and the lower outer ring 13 can rotate relative to the inner ring 11 with the cooperation of the upper bearing seat and the lower bearing seat. The bottom of the inner ring 11 is connected to the fixed part of the external electronic device, and the lower bearing seat on the lower side of the lower outer ring 13 is connected to the rotating part of the external electronic device. With the cooperation of the upper outer ring 12 and the lower outer ring 13, the rotating part of the external electronic device can rotate with the inner ring 11 as the axis.

[0062] The rotary joint sealing assembly 2 includes a first dynamic seal 21, a second dynamic seal 22, and a third dynamic seal 23;

[0063] The first dynamic seal 21 is installed on the side of the upper bearing seat, the third dynamic seal 23 is installed on the side of the lower bearing, the first dynamic seal 21, the second dynamic seal 22, the upper outer ring 12 cooperate with the inner ring 11 to form a liquid supply cavity 31, the second dynamic seal 22 is installed at the connection between the upper outer ring 12 and the lower outer ring 13, the second dynamic seal 22, the third dynamic seal 23, the lower outer ring 13 cooperate with the inner ring 11 to form a liquid return cavity 32.

[0064] The liquid supply assembly 4 includes a liquid inlet pipe 41, a liquid outlet pipe 42, a liquid return pipe 43 and a return pipe 44;

[0065] One end of the liquid inlet pipe 41 is fixed above the inner wall of the inner ring 11, the liquid inlet pipe 41 is communicated with the liquid supply cavity 31, the other end of the liquid inlet pipe 41 extends to the outside of the inner ring 11 and is connected to the supply end of the external coolant supply device, the liquid outlet pipe 42 is fixed to the outer wall of the upper outer ring 12, the liquid outlet pipe 42 is communicated with the liquid supply cavity 31, the external electronic device is connected to the liquid outlet pipe 42 through the supply pipeline, the liquid supply cavity 31, the liquid inlet pipe 41 and the liquid outlet pipe 42 form a liquid flow path 1, in the liquid flow path 1, the coolant enters the liquid supply cavity 31 through the liquid inlet pipe 41 and fills the liquid supply cavity 31, the coolant in the liquid supply cavity 31 enters the supply pipeline of the external electronic device through the liquid outlet pipe 42 under the action of pressure, and the supply pipeline of the external electronic device sends the coolant into the cooling system of the external electronic device;

[0066] One end of the liquid return pipe 43 is fixed below the inner wall of the inner ring 11, the liquid return pipe 43 is connected to the liquid return cavity 32, the other end of the liquid return pipe 43 extends to the outside of the inner ring 11 and is connected to the storage end of the external coolant supply equipment, the liquid return pipe 43 is connected to the liquid return cavity 32, the return pipe 44 is fixed to the outer wall of the lower outer ring 13, the external electronic equipment is connected to the return pipe 44 through the return pipeline, the return pipe 44 is connected to the liquid return cavity 32, the liquid return cavity 32, the liquid return pipe 43 and the return pipe 44 form a liquid flow path 2, in which the coolant passing through the external electronic equipment cooling system enters the liquid return cavity 32 through the return pipeline and the return pipe 44 after completing the heat exchange, and the coolant entering the liquid return cavity 32 passes through the liquid return pipe 43.

[0067] The overflow chamber assembly includes an upper overflow chamber 211 and a lower overflow chamber 231. The upper overflow chamber 211 is formed on the side of the first dynamic seal 21 and is closely connected to the first dynamic seal 21. The pressure of the liquid supply chamber 31 is greater than the pressure of the liquid return chamber 32. The pressure of the liquid supply chamber 31 is greater than the pressure of the upper overflow chamber 211. When the first dynamic seal 21 leaks, the coolant inside the liquid supply chamber 31 passes through the first dynamic seal 21 under the action of pressure and enters the upper overflow chamber 211. The lower overflow chamber 231 is formed on one side of the third dynamic seal 23 and is closely connected to the third dynamic seal 23. The pressure of the liquid return chamber 32 is greater than the pressure at the liquid return pipe 43. The pressure of the liquid return chamber 32 is greater than the pressure of the lower overflow chamber 231. When the third dynamic seal 23 leaks, the coolant inside the liquid return chamber 32 passes through the third dynamic seal 23 under the action of pressure and enters the lower overflow chamber 231.

[0068] The liquid circulation pipeline assembly 5 includes an upper overflow pipe 51 and a lower overflow pipe 52;

[0069] The upper end of the upper overflow pipe 51 is fixed to the upper part of the inner wall of the inner ring 11, and the inner ring 11 is connected to the upper overflow chamber 211. The coolant entering the upper overflow chamber 211 enters the upper overflow pipe 51 and is discharged from the upper overflow chamber 211 through the upper overflow pipe 51. The upper end of the lower overflow pipe 52 is fixed to the lower part of the inner wall of the inner ring 11, and the inner ring 11 is connected to the lower overflow chamber 231. The coolant entering the lower overflow chamber 231 enters the lower overflow pipe 52 and is discharged from the lower overflow chamber 231 through the lower overflow pipe 52.

[0070] The overflow centralized delivery pipe group 6 includes a three-way joint 61 and a first hose 62, a second hose 63 and a third hose 64;

[0071] The upper end of the first hose 62 is connected to the lower end of the lower overflow pipe 52, and the upper end of the second hose 63 is connected to the lower end of the upper overflow pipe 51. The cooling liquid entering the upper overflow pipe 51 and the lower overflow pipe 52 is led out from the upper overflow pipe 51 and the lower overflow pipe 52 to the first hose 62 and the second hose 63, and is continuously guided and transported by the first hose 62 and the second hose 63.

[0072] The first interface of the three-way joint 61 is connected to the lower end of the first hose 62, the second interface of the three-way joint 61 is connected to the lower end of the second hose 63, and the third interface of the three-way joint 61 is connected to the third hose 64. Under the action of the three-way joint 61, the coolant in the first hose 62 and the second hose 63 converges and discharges to the third hose 64.

[0073] The overflow return component 7 includes a return joint 71, a one-way valve 72, a safety valve 73 and a switching joint 74;

[0074] The first interface of the reflux joint 71 is connected to the bottom of the return pipe 43, the one-way valve 72 is connected to the second interface of the reflux joint 71, the safety valve 73 is connected to the third interface of the reflux joint 71, one end of the adapter 74 is connected to the bottom end of the third hose 64, and the other end of the adapter 74 is connected to the one-way valve 72. The third hose 64 guides the coolant to the one-way valve 72 and sends it into the reflux joint 71 through the one-way valve 72. The coolant re-enters the return pipe 43 under the action of the reflux joint 71 and flows back to the storage end of the external coolant supply equipment along with the return pipe 43.

[0075] The above description is only a preferred embodiment of the present invention, which is only illustrative and not restrictive of the present invention. Those skilled in the art understand that many changes, modifications, and even equivalents may be made to the present invention within the spirit and scope defined by the claims of the present invention, but all of them will fall within the scope of protection of the present invention.

Claims

1. A fully enclosed self-circulating liquid rotary joint, characterized in that: It includes a rotary joint body, a rotary joint sealing component, a liquid supply component, an overflow chamber component, a liquid circulation pipeline component, an overflow centralized delivery pipe group and an overflow return component; The bottom of the rotary joint body is connected to the fixed part of the external electronic device, and the top of the rotary joint body is connected to the rotating part of the external electronic device, and the rotating part of the external electronic device uses the rotary joint body as the rotation axis; The rotary joint sealing assembly is installed at both ends of the rotary joint body, and the rotary joint sealing assembly seals the movable part of the rotary joint body, and forms a liquid supply cavity and a liquid return cavity in the rotary joint body through sealing; The liquid supply assembly is installed in the rotary joint body, and the liquid supply assembly is connected with the liquid supply cavity and the liquid return cavity to form a liquid circulation channel; The overflow chamber assembly is installed inside the liquid supply chamber and the liquid return chamber, and the overflow chamber assembly is connected and fitted with the rotary joint sealing assembly. The overflow chamber assembly collects the coolant leaked from the rotary joint sealing assembly; The liquid circulation pipeline assembly is connected to the overflow chamber assembly, and the liquid circulation pipeline assembly sends the leaked coolant out of the rotary joint body; The overflow centralized delivery pipe group cooperates with the overflow return component to return the coolant delivered by the liquid circulation pipeline component to the liquid circulation channel.

2. A fully enclosed self-circulating liquid rotary joint as claimed in claim 1, characterized in that: The joint body includes an inner ring, an upper outer ring and a lower outer ring. The upper outer ring is axially docked and fixed with the lower outer ring. The upper end of the upper outer ring is rotatably connected to the inner ring via an upper bearing seat, and the lower end of the lower outer ring is rotatably connected to the inner ring via a lower bearing seat.

3. A fully enclosed self-circulating liquid rotary joint as claimed in claim 2, characterized in that: The rotary joint sealing assembly includes a first dynamic seal, a second dynamic seal, and a third dynamic seal. The first dynamic seal is installed on the side of the upper bearing, the third dynamic seal is installed on the side of the lower bearing, and the second dynamic seal is installed at the connection between the upper outer ring and the lower outer ring. The first dynamic seal, the second dynamic seal, and the upper outer ring cooperate with the inner ring to form a liquid supply cavity, and the second dynamic seal, the third dynamic seal, and the lower outer ring cooperate with the inner ring to form a liquid return cavity.

4. A fully enclosed self-circulating liquid rotary joint as claimed in claim 2, characterized in that: The liquid supply assembly includes a liquid inlet pipe, a liquid outlet pipe, a liquid return pipe and a return pipe, one end of the liquid inlet pipe is fixed above the inner wall of the inner ring, the other end of the liquid inlet pipe extends to the outside of the inner ring, the liquid inlet pipe is communicated with the liquid supply cavity, the liquid outlet pipe is fixed to the outer wall of the upper outer ring, the liquid outlet pipe is communicated with the liquid supply cavity, the liquid supply cavity, the liquid inlet pipe and the liquid outlet pipe form a liquid flow path one, one end of the liquid return pipe is fixed below the inner wall of the inner ring, the other end of the liquid return pipe extends to the outside of the inner ring, the liquid return pipe is communicated with the liquid return cavity, the return pipe is fixed to the outer wall of the lower outer ring, the return pipe is communicated with the liquid return cavity, and the liquid return cavity, the liquid return pipe and the return pipe form a liquid flow path two.

5. A fully enclosed self-circulating liquid rotary joint as claimed in claim 4, characterized in that: The overflow chamber assembly includes an upper overflow chamber and a lower overflow chamber. The upper overflow chamber is formed on the side of the first dynamic seal and is connected to the first dynamic seal. The lower overflow chamber is formed on the side of the third dynamic seal and is connected to the third dynamic seal.

6. A fully enclosed self-circulating liquid rotary joint as claimed in claim 4, characterized in that: The liquid circulation pipeline assembly includes an upper overflow pipe and a lower overflow pipe, the upper end of the upper overflow pipe is fixed to the upper part of the inner wall of the inner ring, the inner ring is connected to the upper overflow cavity, and the upper end of the lower overflow pipe is fixed to the lower part of the inner wall of the inner ring, and the inner ring is connected to the lower overflow cavity.

7. A fully enclosed self-circulating liquid rotary joint as claimed in claim 5, characterized in that: The overflow centralized conveying pipe group includes a three-way joint and a first hose, a second hose and a third hose. The upper end of the first hose is connected to the lower end of the lower overflow pipe, the upper end of the second hose is connected to the lower end of the upper overflow pipe, the first interface of the three-way joint is connected to the lower end of the first hose, the second interface of the three-way joint is connected to the lower end of the second hose, and the third interface of the three-way joint is connected to the third hose.

8. A fully enclosed self-circulating liquid rotary joint as claimed in claim 5, characterized in that: The overflow return component includes a reflux joint, a one-way valve, a safety valve and an adapter. The first interface of the reflux joint is connected to the bottom of the return liquid pipe, the one-way valve is connected to the second interface of the reflux joint, the safety valve is connected to the third interface of the reflux joint, one end of the adapter is connected to the bottom end of the third hose, and the other end of the adapter is connected to the one-way valve.

9. A fully enclosed self-circulating liquid rotary joint as claimed in claim 7, characterized in that: The pressure of the liquid supply cavity is greater than the pressure of the liquid return cavity, the pressure of the liquid supply cavity is greater than the pressure of the upper overflow cavity, the pressure of the liquid return cavity is greater than the pressure at the liquid return pipe, and the pressure of the liquid return cavity is greater than the pressure of the lower overflow cavity.

10. A method for using a fully enclosed self-circulating liquid rotary joint as claimed in any one of claims 1 to 9, characterized in that: The following steps are included: Step S1, connecting the liquid inlet pipe to the supply end of the external coolant supply device, connecting the rotating part of the external electronic device to the liquid outlet pipe through the supply pipeline, connecting the liquid return pipe to the storage end of the external coolant supply device, and connecting the rotating part of the external electronic device to the return pipe through the return pipeline; Step S2, the external coolant supply device delivers the coolant into the liquid supply cavity through the liquid inlet pipe and fills the liquid supply cavity, the coolant in the liquid supply cavity enters the supply pipeline of the external electronic device through the liquid outlet pipe under the action of pressure, the coolant is delivered to the cooling system of the external electronic device through the supply pipeline of the external electronic device, the coolant passing through the cooling system of the external electronic device enters the return liquid cavity through the return pipeline and the return pipe after completing the heat exchange, and the coolant entering the return liquid cavity flows back to the storage end of the external coolant supply device through the return liquid pipe; Step S3, when the first dynamic seal leaks, the coolant in the liquid supply cavity passes through the first dynamic seal under the action of pressure and enters the upper overflow cavity; when the third dynamic seal leaks, the coolant in the liquid return cavity passes through the third dynamic seal under the action of pressure and enters the lower overflow cavity; Step S4, the coolant entering the upper overflow chamber enters the upper overflow pipe and is discharged from the upper overflow chamber through the upper overflow pipe, and the coolant entering the lower overflow chamber enters the lower overflow pipe and is discharged from the lower overflow chamber through the lower overflow pipe; Step S5, the cooling liquid entering the upper overflow pipe and the lower overflow pipe is led out from the upper overflow pipe and the lower overflow pipe to the first hose and the second hose, and is further guided and transported to the three-way joint by the first hose and the second hose. Under the action of the three-way joint, the cooling liquid is guided to the one-way valve through the third hose; Step S6, the coolant enters the return pipe through the one-way valve under pressure, and flows back to the storage end of the external coolant supply device along the return pipe.

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