Liquid cooling connection line, liquid cooling system, data center and maintenance method

Abstract

The disclosure provides a liquid cooling connection pipeline, a liquid cooling system, a data center and a maintenance method, and belongs to the technical field of liquid cooling. The liquid cooling system comprises a main ring pipeline, a plurality of branch pipelines and a standby branch pipeline. One end of the plurality of branch pipelines is in communication with the main ring pipeline, and the other end is in communication with a cabinet. A main valve is arranged between two adjacent branch pipelines on the main ring pipeline. When the main valve needs to be maintained, one end of the liquid cooling connection pipeline is in communication with the standby branch pipeline, and the other end is connected in a target branch pipeline. The target branch pipeline is one branch pipeline adjacent to the faulty main valve. Then, the main valves on both sides of the faulty main valve are closed, and the faulty main valve can be maintained. During the maintenance process, the branch pipelines on both sides of the faulty main valve are disconnected from the main ring pipeline, so that the two cabinets cannot realize liquid cooling through the branch pipelines. However, since one of the cabinets can realize liquid cooling through the liquid cooling connection pipeline and the standby branch pipeline, only one cabinet is abnormally liquid-cooled, thereby reducing the loss.

Description

Technical Field

[0001] This disclosure relates to the field of liquid cooling technology, and in particular to a liquid cooling connection pipeline, a liquid cooling system, a data center, and a maintenance method. Background Technology

[0002] Currently, liquid cooling systems are commonly used to dissipate heat from servers in server racks. A typical liquid cooling system includes a main supply loop, a main return loop, supply branch pipes, return branch pipes, and a liquid cooling source. The working principle of the liquid cooling system is as follows: the liquid cooling source supplies coolant to the main supply loop. After flowing into the main supply loop, the coolant flows through multiple supply branch pipes into multiple server racks, cooling the servers within. Then, the coolant heats up and flows back to the main return loop through the return branch pipes. The coolant in the main return loop flows back to the liquid cooling source. The coolant is cooled in the liquid cooling source and then flows back into the main supply loop, thus forming a liquid cooling cycle. The main supply loop and the main return loop can be collectively referred to as the main loop, and the supply branch pipes and the return branch pipes can be collectively referred to as branch pipes.

[0003] To control the liquid cooling of each cabinet, a main valve is installed between any two adjacent branch pipes on the main loop. When two adjacent main valves are closed, the branch pipe between the two main valves is effectively disconnected from the main loop, causing liquid cooling malfunctions in the cabinets connected to that branch pipe.

[0004] When maintenance is required on a main valve, both main valves on either side of the faulty main valve must be closed to prevent liquid coolant leakage. However, this disconnects the two branch lines between the closed main valves from the main loop, causing abnormal liquid cooling in the two cabinets connected to these branch lines and resulting in significant losses. Summary of the Invention

[0005] This disclosure provides a liquid-cooled connection piping, a liquid-cooling system, a data center, and a maintenance method. During the maintenance of the main valve, the liquid-cooled connection piping connects a cabinet adjacent to the faulty main valve to a backup branch piping, allowing liquid cooling of that cabinet to be achieved through the backup branch piping. This reduces the fault area during main valve maintenance to a single cabinet, minimizing losses. The technical solutions for the liquid-cooled connection piping, liquid-cooling system, data center, and maintenance method are as follows:

[0006] In one aspect, this disclosure provides a liquid-cooled connection piping system used in a liquid-cooling system, which includes a main loop piping, multiple branch piping, and a backup branch piping. One end of each branch piping is connected to the main loop piping, and the other end is used to connect to a server rack. A main valve is installed between adjacent branch piping on the main loop piping. One end of the backup branch piping is connected to the main loop piping.

[0007] The liquid-cooled connection piping provided in this disclosure includes a main connection piping, a first valve, and a first tee pipe. The first end of the main connection piping is connected to one end of the first valve, and the other end of the first valve is connected to the first port of the first tee pipe. This liquid-cooled connection piping can reduce the number of cabinets involved in the fault domain during maintenance when a main valve in the liquid-cooling system malfunctions and requires repair, thus minimizing losses. Here, the cabinets in the fault domain refer to those experiencing liquid-cooling abnormalities.

[0008] After the main valve fails, firstly, shut off the target branch pipe to allow connection between the target branch pipe and the liquid cooling connection pipe. At this time, the liquid cooling of the cabinet connected to the target branch pipe will be abnormal, and the fault domain includes one cabinet. The target branch pipe is any pipe adjacent to the faulty main valve.

[0009] Then, connect the second end of the main connection pipe of the liquid cooling connection pipeline to the backup branch pipe, and connect the second and third ports of the first tee of the liquid cooling connection pipeline to the target branch pipe. Connect the backup branch pipe and open the first valve of the liquid cooling connection pipeline. The cabinet can then achieve liquid cooling through the backup branch pipe, the liquid cooling of the cabinet is normal, and the fault domain does not include the cabinet.

[0010] Then, the main valves on both sides of the faulty main valve are closed. The two cabinets connected to the main loop between the two main valves cannot achieve liquid cooling through the corresponding branch pipes. However, since the cabinet connected to the target branch pipe has achieved liquid cooling through the backup branch pipe, the fault domain at this moment only includes one cabinet.

[0011] Next, repair the faulty main valve. After the faulty main valve is repaired, close the first valve, open the target branch pipe, and open the main valves on both sides of the faulty main valve. Then, both cabinets connected to the main loop pipe between these two main valves can achieve liquid cooling through their corresponding branch pipes (including the target branch pipe). At this point, the liquid cooling system returns to normal operation.

[0012] As can be seen from the above process, the fault domain at any given time can consist of at most one cabinet. Therefore, by using the liquid-cooled connection piping provided in this disclosure, the fault domain during main valve maintenance can be reduced to one cabinet.

[0013] In addition, by installing a first tee pipe in the liquid cooling connection pipeline, after maintenance is completed, when the target cabinet (the cabinet connected to the target branch pipeline) switches from liquid cooling via the backup branch pipeline to liquid cooling via the target branch pipeline, it is only necessary to connect the target branch pipeline and close the first valve (this operation can be completed in a very short time), and the liquid cooling of the cabinet will not malfunction again.

[0014] Understandably, if the liquid cooling connection piping lacks a first tee and only has a standard connector, the liquid cooling of the target cabinet will remain abnormal for a period during the switchover process from the backup branch piping to the target branch piping. Specifically, if the connector is connected to the target branch piping, the backup branch piping must first be shut off or the first valve closed during the switchover, causing the target cabinet's liquid cooling to malfunction. Then, the connector is removed from the target branch piping, and the target branch piping is reconnected and its circuit opened; the switchover is then complete, and the cabinet's liquid cooling returns to normal. During both the removal and reconnection of the connector from the target branch piping, the cabinet's liquid cooling remains abnormal.

[0015] In one possible implementation, the main connecting pipeline is removed from the liquid cooling system after the faulty main valve has been repaired.

[0016] In one possible implementation, the liquid cooling connection pipeline also includes a second tee pipe, the fourth and fifth ports of which are connected to the main connection pipeline, and the sixth port of which is used to connect to the liquid replenishment source.

[0017] The liquid replenishment source is used to replenish the liquid in the main connection pipeline before the liquid working fluid flows into the liquid cooling system (such as the spare branch pipeline or cabinet). This reduces the impact of the connection of the liquid cooling pipeline on the pressure of the liquid cooling system and avoids the direct connection of an empty main connection pipeline, which would cause a sudden drop in the pressure of the liquid cooling system.

[0018] In one possible implementation, the replenishment source is used to replenish the main connection pipeline until the pressure in the main connection pipeline is consistent with the pressure in the main loop pipeline of the liquid cooling system.

[0019] In one possible implementation, the liquid cooling connection pipeline also includes a liquid replenishment pipeline and a liquid replenishment source, with one end of the liquid replenishment pipeline connected to the sixth port and the other end connected to the liquid replenishment source.

[0020] The fluid source can be a fluid replenishment tank, such as a water replenishment tank.

[0021] In one possible implementation, the liquid cooling connection pipeline also includes a third tee pipe, an exhaust pipe, and an exhaust valve. The seventh and eighth ports of the third tee pipe are connected to the main connection pipeline. One end of the exhaust pipe is connected to the ninth port of the third tee pipe, and the other end is connected to the exhaust valve.

[0022] During the process of the liquid cooling working fluid flowing into the liquid cooling connection pipeline, the gas in the liquid cooling connection pipeline can be discharged in sequence through the ninth port, the exhaust pipeline and the exhaust valve under the compression of the liquid cooling working fluid, thus preventing the gas in the liquid cooling connection pipeline from entering the circulation of the liquid cooling working fluid.

[0023] In one possible implementation, the liquid cooling connection line also includes a second valve, which is located on the exhaust line.

[0024] In one possible implementation, the liquid-cooled connection pipeline further includes a third valve and a fourth valve. One end of the third valve is connected to the first end of the main connection pipeline, and the other end is connected to the first valve. One end of the fourth valve is connected to the second end of the main connection pipeline, and the other end is used to connect to a backup branch pipeline.

[0025] During the disassembly of the liquid-cooled connection pipeline, the third and fourth valves are closed, leaving the liquid coolant in the main connection pipeline between the third and fourth valves. Afterwards, the main connection pipeline, along with the third and fourth valves, is disassembled together, thus preventing leakage of the liquid coolant from the main connection pipeline and maintaining the cleanliness of the environment in which the liquid cooling system operates.

[0026] In one possible implementation, the liquid-cooled connection pipeline also includes end caps that seal all openings of the liquid-cooled connection pipeline, thereby preventing impurities from entering the liquid-cooled connection pipeline through the openings when the pipeline is idle.

[0027] In one possible implementation, the liquid-cooled connection pipeline also includes clamps that connect the various components of the liquid-cooled connection pipeline, thereby improving the connection efficiency of the liquid-cooled connection pipeline.

[0028] In one possible implementation, the branch line includes a first line, a branch line valve, and a second line connected in sequence. The first line is connected to the main loop line, and the second line is used to connect to the cabinet. The second and third ports of the first tee are used to connect between the branch line valve and the second line of the target branch line.

[0029] In one possible implementation, if the faulty main valve is located in the main supply loop, then the branch pipe is the supply branch pipe, and the standby branch pipe is the supply standby branch pipe.

[0030] In one possible implementation, if the faulty main valve is located in the return main loop, then the branch line is the return branch line, and the standby branch line is the return supply branch line.

[0031] Secondly, this disclosure provides a liquid cooling system, which includes a main loop pipeline, multiple branch pipelines, a backup branch pipeline, and a liquid cooling connection pipeline as described in the first aspect. One end of each of the multiple branch pipelines is connected to the main loop pipeline, and the other end is used to connect to a server rack. A main valve is installed between adjacent branch pipelines on the main loop pipeline. One end of the backup branch pipeline is connected to the main loop pipeline. The second end of the main connection pipeline of the liquid cooling connection pipeline is used to connect to the backup branch pipeline. The second and third ports of the first tee of the liquid cooling connection pipeline are used to connect to a target branch pipeline, which is any branch pipeline adjacent to the faulty main valve.

[0032] During the repair of the faulty main valve, the first valve of the liquid cooling connection pipeline is opened, and the backup branch pipeline is connected. After the faulty main valve is repaired, the target branch pipeline is connected, the first valve and the first tee pipe remain in the liquid cooling system, and the first valve is closed.

[0033] Thirdly, this disclosure provides a data center that includes the liquid cooling system described in the second aspect.

[0034] The data center also includes server racks, with liquid cooling systems used to cool the servers within them. The servers in the racks can be any type of server, such as high-density servers.

[0035] Fourthly, this disclosure provides a maintenance method applied to the liquid cooling system of the second aspect. The maintenance method includes: shutting off the target branch pipe; connecting the second end of the main connecting pipe of the liquid cooling connection pipe to the standby branch pipe; connecting the second and third ports of the first tee of the liquid cooling connection pipe to the target branch pipe; opening the standby branch pipe and opening the first valve of the liquid cooling connection pipe; closing the main valves on both sides of the faulty main valve; repairing the faulty main valve; after the faulty main valve is repaired, closing the first valve, opening the target branch pipe, and opening the main valves on both sides of the faulty main valve.

[0036] In one possible implementation, when the branch pipeline includes a first pipeline, a branch pipeline valve, and a second pipeline connected in sequence, when installing the first tee pipe, the second and third ports of the first tee pipe are connected between the branch pipeline valve and the second pipeline.

[0037] In one possible implementation, the liquid-cooled connection pipeline also includes a second tee pipe. Before the liquid working fluid flows into the liquid-cooling system from the main connection pipeline, the replenishment source is controlled to replenish the main connection pipeline through the second tee pipe. This prevents an empty main connection pipeline from being directly connected to the liquid-cooling system, which could cause a sudden drop in the liquid-cooling system's pressure.

[0038] In one possible implementation, the replenishment source is used to replenish the main connection pipeline until the pressure in the main connection pipeline is consistent with the pressure in the main loop pipeline of the liquid cooling system.

[0039] In one possible implementation, after closing the first valve, the main connecting pipe is disconnected from the liquid cooling system.

[0040] In one possible implementation, the liquid-cooled connection pipeline also includes a third valve and a fourth valve. When disassembling the main connection pipeline, the third and fourth valves are closed, the third valve is separated from the first valve, and the fourth valve is separated from the spare branch pipeline. In this way, the liquid coolant in the main connection pipeline remains between the third and fourth valves and is disassembled along with the main connection pipeline, the third valve, and the fourth valve, thereby preventing liquid coolant leakage and environmental pollution. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of a data center provided in an embodiment of this disclosure;

[0042] Figure 2 This is a schematic diagram of a liquid cooling source provided in an embodiment of this disclosure;

[0043] Figure 3 This is a schematic diagram of a data center provided in an embodiment of this disclosure;

[0044] Figure 4 This is a schematic diagram of a data center provided in an embodiment of this disclosure;

[0045] Figure 5 This is a schematic diagram of a liquid cooling connection pipeline provided in an embodiment of this disclosure;

[0046] Figure 6 This is a partial schematic diagram of a data center provided in an embodiment of this disclosure;

[0047] Figure 7 This is a schematic diagram illustrating the usage process of a liquid-cooled connection pipeline provided in an embodiment of this disclosure;

[0048] Figure 8 This is a schematic diagram illustrating the usage process of a liquid-cooled connection pipeline provided in an embodiment of this disclosure;

[0049] Figure 9 This is a partial schematic diagram of a data center provided in an embodiment of this disclosure;

[0050] Figure 10 This is a schematic diagram of a liquid cooling connection pipeline provided in an embodiment of this disclosure;

[0051] Figure 11 This is a schematic diagram of a liquid cooling connection pipeline provided in an embodiment of this disclosure;

[0052] Figure 12 This is a schematic diagram of a liquid cooling connection pipeline provided in an embodiment of this disclosure;

[0053] Figure 13 This is a schematic diagram of a liquid cooling connection pipeline provided in an embodiment of this disclosure;

[0054] Figure 14 This is a schematic diagram of a liquid cooling connection pipeline provided in an embodiment of this disclosure;

[0055] Figure 15 This is a schematic diagram of a liquid cooling connection pipeline provided in an embodiment of this disclosure;

[0056] Figure 16 This is a schematic diagram of a data center provided in an embodiment of this disclosure;

[0057] Figure 17 This is a flowchart of a maintenance method provided in an embodiment of this disclosure.

[0058] Legend

[0059] 100. Liquid cooling connection piping; 1. Main connection piping; 2. First valve; 3. First tee pipe; 301. First port; 302. Second port; 303. Third port; 4. Second tee pipe; 401. Fourth port; 402. Fifth port; 403. Sixth port; 5. Liquid replenishment piping; 6. Liquid replenishment source; 7. Third tee pipe; 701. Seventh port; 702. Eighth port; 703. Ninth port; 8. Exhaust piping; 9. Exhaust valve; 10. Second valve; 11. Third valve; 12. Fourth valve;

[0060] 200, main loop pipeline; 200a, main supply loop pipeline; 200b, main return loop pipeline; 210, main valve; 210a, first main valve; 210b, second main valve; 210c, third main valve.

[0061] 300, branch line; 300a, supply branch line; 300b, return branch line; 310, first line; 320, branch line valve; 330, second line.

[0062] 400, standby branch line; 400a, standby branch line for liquid supply; 400b, standby branch line for liquid return; 410, standby branch line valve.

[0063] 500. Liquid cooling source; 501. Cold source; 502. Primary side liquid supply line; 503. Heat exchanger; 504. Primary side liquid return line; 505. Circulating water pump; 506. Secondary side liquid supply line; 507. CDU; 508. CDU liquid supply line; 509. CDU liquid return line; 510. Secondary side liquid return line. Detailed Implementation

[0064] With the rapid development of cloud computing, artificial intelligence (AI), and 5G, high-density servers have become a trend in data centers. At the same time, the power consumption of high-density servers continues to rise, posing challenges to their heat dissipation. For data centers, cooling systems account for approximately 40% of total energy consumption; therefore, selecting a suitable cooling system is crucial for reducing power usage effectiveness (PUE) and achieving energy conservation and emission reduction.

[0065] For high-density servers, liquid cooling is the most effective way to solve heat dissipation and energy saving. For example... Figure 1 As shown, the liquid cooling system includes a main supply loop 200a, a main return loop 200b, a supply branch loop 300a, a return branch loop 300b, a backup supply branch loop 400a, a backup return branch loop 400b, and a liquid cooling source 500. The main supply loop 200a and the main return loop 200b can be collectively referred to as the main loop 200, the supply branch loop 300a and the return branch loop 300b can be collectively referred to as the branch loop 300, and the backup supply branch loop 400a and the backup return branch loop 400b can be collectively referred to as the backup branch loop 400.

[0066] like Figure 1 As shown, the working principle of the liquid cooling system is as follows: The liquid cooling source 500 supplies liquid cooling fluid (such as liquid cooling water) to the main supply loop pipe 200a. After flowing into the main supply loop pipe 200a, the liquid cooling fluid flows into multiple server racks through multiple supply branch pipes 300a, cooling the servers in the racks. Then, the liquid cooling fluid heats up and flows back to the main return loop pipe 200b through the return branch pipe 300b. The liquid cooling fluid in the main return loop pipe 200b flows back to the liquid cooling source 500. The liquid cooling fluid is cooled in the liquid cooling source 500 and then flows back into the main supply loop pipe 200a, thus forming a liquid cooling cycle. The backup supply branch line 400a is used to supply liquid coolant to the cabinet in case of a failure in the supply branch line 300a. The backup return branch line 400b is used to replace the failure in the return branch line 300b, allowing the liquid coolant in the cabinet to flow back to the main return loop line 200b. Additionally, the backup supply branch line 400a and the backup return branch line 400b are also used for draining. The cabinet can also be referred to as a tank.

[0067] like Figure 2As shown, the liquid cooling source 500 includes a cooling source 501, a primary side liquid supply line 502, a heat exchanger 503, a primary side liquid return line 504, a circulating water pump 505, a secondary side liquid supply line 506, a coolant distribution unit (CDU) 507, a CDU liquid supply line 508, a CDU liquid return line 509, and a secondary side liquid return line 510.

[0068] The working principle of the liquid cooling source 500 is as follows: The cooling source 501 supplies primary-side liquid cooling medium to the heat exchanger 503 through the primary-side liquid supply pipeline 502. In the heat exchanger 503, the primary-side liquid cooling medium cools the secondary-side liquid cooling medium and raises its temperature, then flows back to the cooling source 501 through the primary-side return pipeline 504 and the circulating water pump 505. The primary-side liquid cooling medium is cooled in the cooling source 501 and then flows back into the primary-side liquid supply pipeline 502, thereby realizing the circulation of the primary-side liquid cooling medium.

[0069] The secondary-side liquid cooling medium in heat exchanger 503 flows into CDU 507 through secondary-side supply line 506. CDU 507 distributes the secondary-side liquid cooling medium and supplies it to the main supply loop 200a through CDU supply line 508. The heated liquid cooling medium in the main return loop 200b flows into CDU 507 through CDU return line 509, and then returns to the secondary side of heat exchanger 503 through secondary-side return line 510. After being cooled by the primary-side liquid cooling medium in heat exchanger 503, the secondary-side liquid cooling medium flows back into CDU 507 through secondary-side supply line 506, thus realizing the circulation of the secondary-side liquid cooling medium.

[0070] As can be seen from the above description, there are two circulation loops, one on the primary side and one on the secondary side, and the liquid cooling working fluids in the two circulation loops are isolated from each other.

[0071] like Figure 1 and Figure 3 As shown, in order to control the liquid cooling of each cabinet, a main valve 210 (which can be called an isolation valve) is installed between any two adjacent liquid supply branch pipes 300a on the main liquid supply loop 200a, and a main valve 210 is installed between any two adjacent liquid return branch pipes 300b on the main liquid return loop 200b.

[0072] When one of the main valves 210 fails, it needs to be repaired (including replacement). During the repair process, in order to prevent leakage of liquid coolant, the main valves 210 on both sides of the faulty main valve 210 need to be closed to prevent liquid coolant from flowing out of the faulty main valve 210.

[0073] like Figure 3As shown, assume the faulty main valve 210 is located in the main liquid supply loop 200a, and this faulty main valve 210 is referred to as the first main valve 210a. The main valves 210 on either side are the second main valve 210b and the third main valve 210c, respectively. During the maintenance of the first main valve 210a, the second main valve 210b and the third main valve 210c need to be closed. This will cause the liquid supply loop 200a between the second main valve 210b and the third main valve 210c to stop receiving liquid coolant. Consequently, the two cabinets connected to this part of the liquid supply loop 200a will no longer receive liquid coolant, resulting in abnormal liquid cooling in these two cabinets.

[0074] Currently, due to the development of high-density servers, the workload carried by each server rack is several times that of traditional server racks. Therefore, if two server racks malfunction at the same time, it can also lead to significant losses.

[0075] To reduce the number of cabinets experiencing liquid cooling malfunctions during main valve 210 maintenance, such as Figure 4 As shown, in the related technology, two main valves 210 are installed between any two adjacent supply branch pipes 300a on the main supply loop pipe 200a, and two main valves 210 are installed between any two adjacent return branch pipes 300b on the main return loop pipe 200b.

[0076] Thus, as Figure 4 As shown, during the maintenance of the first main valve 210a, after the second main valve 210b and the third main valve 210c are closed, the liquid supply main loop 200a between the second main valve 210b and the third main valve 210c is only connected to one cabinet. Therefore, it will only cause liquid cooling abnormality in this one cabinet, thus reducing the loss.

[0077] However, increasing the number of main valves 210 also causes the following problems:

[0078] First, the main valve 210 is generally made of high-value stainless steel, which makes the cost of the liquid cooling system too high.

[0079] Secondly, it is more prone to water leakage, which reduces the reliability of the liquid cooling system.

[0080] Third, it increases the resistance to the flow of the liquid cooling medium, reduces the operating efficiency of the liquid cooling system, and results in higher power consumption of the liquid cooling system.

[0081] Fourth, the increased installation and maintenance space required for the main valve 210 means that the liquid cooling system needs to occupy more space for installation, increasing the construction cost of the computer room.

[0082] In view of the above-mentioned technical problems, this disclosure provides a liquid-cooled connection pipeline 100. During the maintenance of the main valve 210, the liquid-cooled connection pipeline 100 connects a cabinet adjacent to the faulty main valve 210 to the spare branch pipeline 400, so that the liquid cooling of the cabinet will not be affected, and only the liquid cooling of the other cabinet adjacent to the faulty main valve 210 will be affected. Thus, the fault area when maintaining the main valve 210 is reduced to one cabinet, and there is no need to add a main valve 210 to the liquid cooling system.

[0083] The liquid-cooled connection pipeline provided in the embodiments of this disclosure will be described by way of example below:

[0084] like Figure 5 As shown, the liquid cooling connection pipeline 100 includes a main connection pipeline 1, a first valve 2, and a first tee pipe 3. The first end of the main connection pipeline 1 is connected to one end of the first valve 2, and the other end of the first valve 2 is connected to the first port 301 of the first tee pipe 3.

[0085] like Figure 6 As shown, the second end of the main connecting pipe 1 is used to connect to the spare branch pipe 400 of the liquid cooling system. The second port 302 and the third port 303 of the first tee pipe 3 are used to connect to the target branch pipe of the liquid cooling system. The target branch pipe is any branch pipe 300 adjacent to the faulty main valve 210.

[0086] The main connecting pipe 1 can be a flexible hose, which allows it to be bent and adapt to various spatial scenarios.

[0087] The technical solution provided in this disclosure, after the main valve 210 malfunctions, firstly, shuts off the target branch pipe to facilitate the connection between the target branch pipe and the liquid cooling connection pipe 100. At this time, the liquid cooling of the cabinet connected to the target branch pipe is abnormal, and the fault domain includes one cabinet.

[0088] Then, connect the second end of the main connecting pipe 1 of the liquid cooling connection pipe 100 to the backup branch pipe 400, and connect the second port 302 and the third port 303 of the first tee pipe 3 of the liquid cooling connection pipe 100 to the target branch pipe. Turn on the backup branch pipe 400 and open the first valve 2 of the liquid cooling connection pipe 100. The cabinet can then achieve liquid cooling through the backup branch pipe 400. The liquid cooling of the cabinet is normal, and the fault domain does not include the cabinet.

[0089] Then, the main valves 210 on both sides of the faulty main valve 210 are closed. The two cabinets connected to the main loop pipe 200 between the two main valves 210 on both sides cannot achieve liquid cooling through the corresponding branch pipe 300. However, since the cabinet connected to the target branch pipe has achieved liquid cooling through the backup branch pipe 400, the fault domain at this moment only includes one cabinet.

[0090] Next, the faulty main valve 210 is repaired, for example, by replacing it. After the faulty main valve 210 is repaired, the first valve 2 is closed, the target branch pipe is opened, and the main valves 210 on both sides of the faulty main valve 210 are opened. Then, the two cabinets connected to the main loop pipe 200 between these two main valves 210 can achieve liquid cooling through the corresponding branch pipes 300 (including the target branch pipe). At this point, the liquid cooling system returns to normal operation.

[0091] As can be seen from the above process, the fault domain at any given time can include at most one cabinet. Therefore, by using the liquid-cooled connection piping 100 provided in this embodiment, the fault domain during maintenance of the main valve 210 can be reduced to one cabinet, without the need to add a main valve 210 to the liquid-cooling system.

[0092] In addition, by setting a first tee pipe 3 in the liquid cooling connection pipe 100, after maintenance is completed, when the target cabinet (connected to the target branch pipe) is liquid cooled by the backup branch pipe 400 and then switched back to liquid cooling by the target branch pipe, it is only necessary to open the target branch pipe and close the first valve 2, so that the liquid cooling of the cabinet will not malfunction again.

[0093] Understandably, if the liquid cooling connection pipe 100 lacks the first tee pipe 3 and only has a regular connector, the liquid cooling of the target cabinet will remain abnormal for a period of time during the switching process from liquid cooling via the backup branch pipe 400 back to liquid cooling via the target branch pipe. Specifically, if the connector is connected to the target branch pipe, during the switching process, the backup branch pipe 400 must first be shut off, or the first valve 2 must be closed, which will cause the cabinet's liquid cooling to malfunction. Then, the connector is disconnected from the target branch pipe, and the target branch pipe is reconnected and connected, thus completing the switch and restoring normal liquid cooling to the cabinet. However, the liquid cooling of the cabinet remains abnormal during both the disconnection and reconnection of the connector from the target branch pipe.

[0094] This disclosure does not limit the specific location of the second port 302 and the third port 303 of the first tee pipe 3 connected to the target branch pipe. In some examples, such as Figure 6 As shown, the branch pipe 300 (target branch pipe) includes a first pipe 310, a branch pipe valve 320, and a second pipe 330 connected in sequence. The first pipe 310 is connected to the main loop pipe 200, and the second pipe 330 is used to connect to the cabinet. The second port 302 and the third port 303 of the first tee pipe 3 are used to connect between the branch pipe valve 320 and the second pipe 330 of the target branch pipe.

[0095] Among them, the branch line valve 320 can control the shut-off and opening of the branch line 300.

[0096] For example, such as Figure 6 As shown, the second port 302 is connected to the branch valve 320, and the third port 303 is connected to the second pipeline 330.

[0097] Correspondingly, such as Figure 6 As shown, a backup branch line valve 410 is provided in the backup branch line 400, which can control the shut-off and opening of the backup branch line 400.

[0098] In some examples, such as Figure 7 As shown, the main loop 200 is the main loop 200a for liquid supply, the branch loop 300 is the branch loop 300a for liquid supply, and the standby branch loop 400 is the standby branch loop 400a for liquid supply.

[0099] In other examples, such as Figure 8 As shown, the main loop 200 is the return main loop 200b, the branch loop 300 is the return branch loop 300b, and the standby branch loop 400 is the return standby branch loop 400b.

[0100] The following provides a more detailed illustrative description of the use of the liquid-cooled connection pipe 100 in the two scenarios described above:

[0101] (1) As Figure 7 As shown, the main loop 200 is the main loop for liquid supply 200a, the branch loop 300 is the branch for liquid supply 300a, and the standby branch loop 400 is the standby branch for liquid supply 400a.

[0102] After the main valve 210 malfunctions, such as Figure 7 As shown in the upper part, firstly, the target branch line is shut off (branch line valve 320 in the target branch line is closed), so that the main supply loop line 200a no longer supplies liquid to the cabinet through the target branch line, so as to facilitate the subsequent connection of the target branch line to the liquid cooling connection line 100. At this moment, the liquid cooling of the cabinet connected to the target branch line is abnormal, and the fault domain includes one cabinet. In addition, the return branch line 300b connected to the target branch line can also be shut off to prevent the liquid cooling working fluid in the return branch line 300b from flowing back and flowing out from the disconnected target branch line.

[0103] Then, as Figure 7As shown in the middle section, the second end of the main connecting pipe 1 of the liquid cooling connection pipe 100 is connected to the liquid supply backup branch pipe 400a. The second port 302 and the third port 303 of the first tee pipe 3 of the liquid cooling connection pipe 100 are connected to the target branch pipe. The liquid supply backup branch pipe 400a is turned on (the backup branch pipe valve 410 is opened), the first valve 2 of the liquid cooling connection pipe 100 is opened, and the return branch pipe 300b connected to the target branch pipe is opened. Then the liquid supply backup branch pipe 400a can be used to supply liquid to the cabinet. The liquid cooling of the cabinet is normal, and the fault domain does not include the cabinet.

[0104] Then, as Figure 7 As shown in the middle part, if the main valves 210 on both sides of the faulty main valve 210 are closed, the two cabinets connected to the main liquid supply loop 200a between the two main valves 210 on both sides will not be able to supply liquid through the corresponding liquid supply branch 300a. However, since the cabinet connected to the target branch has been supplied liquid through the backup liquid supply branch 400a, at this moment the fault domain only includes one cabinet.

[0105] Next, repair the faulty main valve 210, for example, replace the faulty main valve 210. Figure 7 As shown in the lower part, after the faulty main valve 210 is repaired, the first valve 2 is closed, the target branch pipe is opened, and the main valves 210 on both sides of the faulty main valve 210 are opened. Then, the two cabinets connected to the main loop pipe 200 between the two main valves 210 can be supplied with liquid through the corresponding liquid supply branch pipe 300a (including the target branch pipe). At this moment, the liquid cooling system returns to normal.

[0106] (2) Figure 8 As shown, the main loop 200 is the return main loop 200b, the branch loop 300 is the return branch loop 300b, and the standby branch loop 400 is the return standby branch loop 400b.

[0107] After the main valve 210 malfunctions, such as Figure 8 As shown in the upper part, firstly, the target branch line is shut off (branch line valve 320 in the target branch line is closed) to facilitate subsequent connection of the target branch line to the liquid cooling connection line 100. Additionally, when shutting off the target branch line, the valve in the liquid supply branch line 300a connected to the target branch line can also be closed to prevent the liquid cooling working fluid in the liquid supply branch line 300a from flowing out of the disconnected target branch line. At this moment, the cabinet liquid cooling system connected to the target branch line malfunctions, and the fault domain includes one cabinet.

[0108] Then, as Figure 8As shown in the middle section, the second end of the main connecting pipe 1 of the liquid cooling connection pipe 100 is connected to the return liquid backup branch pipe 400b. The second port 302 and the third port 303 of the first tee pipe 3 of the liquid cooling connection pipe 100 are connected to the target branch pipe. The return liquid backup branch pipe 400b is opened, and the first valve 2 of the liquid cooling connection pipe 100 is opened. In addition, the valve in the corresponding supply liquid branch pipe 300a is opened. Then, the liquid cooling working fluid in the cabinet flows back to the return liquid main loop pipe 200b through the return liquid backup branch pipe 400b. The liquid cooling of the cabinet is normal, and the fault domain does not include the cabinet.

[0109] Then, as Figure 8 As shown in the middle part, when the main valves 210 on both sides of the faulty main valve 210 are closed, the liquid cooling medium in the two cabinets connected to the return main loop pipe 200b between the two main valves 210 on both sides cannot flow back to the return main loop pipe 200b through the corresponding return branch pipe 300b. However, since the liquid cooling medium in the cabinet connected to the target branch pipe has flowed back to the return main loop pipe 200b through the return backup branch pipe 400b, at this moment the fault domain only includes one cabinet.

[0110] Next, repair the faulty main valve 210, for example, replace the faulty main valve 210. Figure 8 As shown in the lower part, after the faulty main valve 210 is repaired, the first valve 2 is closed, the target branch pipe is opened, and the main valves 210 on both sides of the faulty main valve 210 are opened. Then, the liquid cooling media in the two cabinets connected to the return main loop pipe 200b between the two main valves 210 can flow back to the return main loop pipe 200b through the corresponding return branch pipe 300b (including the target branch pipe). At this moment, the liquid cooling system returns to normal operation.

[0111] In some examples, such as Figure 9 As shown, after the first valve 2 is closed, the main connecting pipe 1 can be removed from the liquid cooling system, while the first valve 2 and the first tee pipe 3 remain in the liquid cooling system.

[0112] The liquid cooling connection pipe 100 will now be described in more detail:

[0113] Connecting the liquid cooling connection pipe 100 to the liquid cooling system will increase the length of the entire liquid cooling system pipeline. Since the liquid cooling connection pipe 100 is an empty pipe, it may cause a decrease in the pressure of the entire liquid cooling system, thereby reducing the reliability of the liquid cooling system.

[0114] In order to maintain a stable pressure in a liquid cooling system, in some examples, such as Figure 10 and Figure 11As shown, the liquid cooling connection pipe 100 also includes a second tee pipe 4, whose fourth port 401 and fifth port 402 are connected to the main connection pipe 1. The sixth port 403 of the second tee pipe 4 is used to connect to the liquid replenishment source 6. The liquid replenishment source 6 is used to replenish liquid in the main connection pipe 1 before the liquid cooling working fluid flows into the liquid cooling system, so as to increase the pressure in the main connection pipe 1 and prevent the pressure in the liquid cooling system from dropping after the main connection pipe 1 is connected to the liquid cooling system.

[0115] The liquid replenishment source 6 can be used to replenish liquid into the main connecting pipe 1 until the pressure in the main connecting pipe 1 is consistent with the pressure in the main loop pipe 200 of the liquid cooling system. Thus, the increase of the liquid cooling connecting pipe 100 will not affect the pressure in the liquid cooling system.

[0116] In some examples, such as Figure 10 and Figure 11 As shown, the fourth port 401 of the second tee pipe 4 is connected to the first valve 2, and the fifth port 402 is connected to the first end of the main connecting pipe 1.

[0117] It should be noted that in some examples, such as Figure 10 As shown, the liquid cooling connection pipe 100 only includes the second tee pipe 4, that is, the liquid cooling connection pipe 100 only retains the port for connecting with the liquid replenishment source 6, and does not include the liquid replenishment source 6 itself.

[0118] In other examples, such as Figure 11 As shown, the liquid cooling connection pipeline 100 includes a second tee pipe 4, a liquid replenishment pipeline 5, and a liquid replenishment source 6. One end of the liquid replenishment pipeline 5 is connected to the sixth port 403, and the other end is connected to the liquid replenishment source 6.

[0119] The present disclosure does not limit the type of the replenishment source 6. In some examples, the replenishment source 6 is a replenishment tank, such as a water tank.

[0120] In some examples, a valve may be installed in the replenishment line 5.

[0121] In addition, some gas inevitably exists in the liquid cooling connection pipe 100. If the liquid cooling connection pipe 100 is connected to the liquid cooling system, the gas will enter the entire liquid cooling system. The gas will be compressed by the liquid cooling fluid and form air pockets in the local area of ​​the pipe, making the pipe prone to rupture. At the same time, it will also increase the flow resistance of the liquid cooling fluid, reduce the liquid cooling effect on the cabinet, and affect the normal flow of the liquid cooling system.

[0122] To address the aforementioned technical issues, in some examples, such as Figure 12As shown, the liquid cooling connection pipeline 100 also includes a third tee pipe 7, an exhaust pipeline 8, and an exhaust valve 9. The seventh port 701 and the eighth port 702 of the third tee pipe 7 are connected to the main connection pipeline 1. One end of the exhaust pipeline 8 is connected to the ninth port 703 of the third tee pipe 7, and the other end is connected to the exhaust valve 9.

[0123] In this way, when the liquid cooling medium flows into the main connecting pipe 1, the gas can be discharged through the exhaust valve 9 under the compression of the liquid cooling medium.

[0124] In some examples, the exhaust valve 9 can be installed at the highest point of the liquid cooling connection pipe 100. Gas in the main connection pipe 1 flows upward along the exhaust pipe 8 and eventually accumulates in the exhaust valve 9. When gas enters the valve chamber of the exhaust valve 9 and accumulates at the top of the exhaust valve 9, the pressure rises as the amount of gas inside the valve increases, causing the exhaust port of the exhaust valve 9 to open and thus release the gas. Once the gas has been completely released, the exhaust port of the exhaust valve 9 closes.

[0125] The specific type of exhaust valve 9 is not limited in the embodiments disclosed herein. Exhaust valve 9 can be a compound exhaust valve, a quick exhaust valve, or a single-port exhaust valve, etc.

[0126] In some examples, the liquid-cooled connection line 100 also includes a second valve 10, which is disposed on the exhaust line 8. The second valve 10 may also be referred to as a maintenance valve, and is mainly used to shut off the exhaust line 8 when servicing the exhaust valve 9. The second valve 10 can prevent the liquid coolant from flowing out of the exhaust valve 9.

[0127] During the disassembly of the liquid-cooled connection pipe 100, the liquid coolant in the main connection pipe 1 may leak out, which could contaminate the environment in which the liquid cooling system is located. To prevent the liquid coolant from leaking out, in some examples, such as... Figure 13 As shown, the liquid cooling connection pipeline 100 also includes a third valve 11 and a fourth valve 12. One end of the third valve 11 is connected to the first end of the main connection pipeline 1, and the other end is connected to the first valve 2. One end of the fourth valve 12 is connected to the second end of the main connection pipeline 1, and the other end is used to connect to the spare branch pipeline 400.

[0128] Thus, during the use of the liquid-cooled connection pipeline 100, the third valve 11 and the fourth valve 12 can be in the open state to prevent them from cutting off the liquid-cooled connection pipeline 100. During the disassembly of the liquid-cooled connection pipeline 100, the third valve 11 and the fourth valve 12 can be closed, allowing the liquid coolant to remain in the main connection pipeline 1, and the main connection pipeline 1 containing the liquid coolant can be disassembled together with the third valve 11 and the fourth valve 12. Figure 15 As shown, this is the disassembled liquid cooling connection pipe section 100.

[0129] In addition to disassembling the main connecting pipe 1 containing the liquid coolant, in some other examples, a water pump can be used to extract the liquid coolant from the main connecting pipe 1 before disassembling the liquid cooling connecting pipe 100. For example, the replenishment source 6 can be replaced with a water pump.

[0130] In some examples, to reduce the possibility of contamination of the liquid-cooled connection pipe 100 by impurities when idle, such as Figure 14 and Figure 15 As shown, the liquid cooling connection pipe 100 also includes an end cap 13, which closes all openings of the liquid cooling connection pipe 100. In this way, impurities will not enter the liquid cooling connection pipe 100 through the openings, ensuring the cleanliness of the inside of the liquid cooling connection pipe 100 and preventing the liquid cooling connection pipe 100 from contaminating the liquid cooling working fluid in the liquid cooling system.

[0131] The opening closed by the end cap 13 will be described below by way of example:

[0132] for Figure 5 The liquid cooling connection pipe 100 shown has an end cap 13 that closes the second port 302 and the third port 303 of the first tee pipe 3, as well as the second end of the main connection pipe 1. When the liquid cooling connection pipe 100 has been used and disassembled, since the first tee pipe 3 and the first valve 2 remain in the liquid cooling system, the end cap 13 closes the first and second ends of the main connection pipe 1.

[0133] for Figure 10 The liquid cooling connection pipe 100 shown has an end cap 13 that closes the second port 302 and the third port 303 of the first tee pipe 3, the sixth port 403 of the second tee pipe 4, and the second end of the main connection pipe 1. After the liquid cooling connection pipe 100 has been used and disassembled, since the first tee pipe 3 and the first valve 2 remain in the liquid cooling system, the end cap 13 closes the fourth port 401 and the sixth port 403 of the second tee pipe 4, as well as the second end of the main connection pipe 1.

[0134] for Figure 11 and Figure 12 The liquid cooling connection pipe 100 shown has an end cap 13 that closes the second port 302 and the third port 303 of the first tee pipe 3, as well as the second end of the main connection pipe 1. After the liquid cooling connection pipe 100 has been used and disassembled, since the first tee pipe 3 and the first valve 2 remain in the liquid cooling system, the end cap 13 closes the fourth port 401 of the second tee pipe 4 and the second end of the main connection pipe 1.

[0135] for Figure 13 The liquid cooling connection pipe 100 shown is as follows: Figure 14As shown, end cap 13 closes the second port 302 and the third port 303 of the first tee pipe 3, as well as the fourth valve 12. Figure 15 As shown, after the liquid cooling connection pipe 100 has been used and disassembled, since the first tee pipe 3 and the first valve 2 remain in the liquid cooling system, the end cap 13 closes the third valve 11 and the fourth valve 12.

[0136] This disclosure does not limit the connection method of the various components in the liquid-cooled connection pipeline 100. In some examples, to improve the connection efficiency, such as... Figures 5-15 As shown, the liquid cooling connection pipeline 100 also includes a clamp 14, which connects the various components included in the liquid cooling connection pipeline 100.

[0137] This disclosure also provides a liquid cooling system, such as Figure 16 As shown, the liquid cooling system includes a main loop pipe 200, multiple branch pipes 300, a backup branch pipe 400, and the aforementioned liquid cooling connection pipe 100. One end of each branch pipe 300 is connected to the main loop pipe 200, and the other end is used to connect to a server rack. A main valve 210 is installed between two adjacent branch pipes 300 on the main loop pipe 200. One end of the backup branch pipe 400 is connected to the main loop pipe 200. The second end of the main connection pipe 1 of the liquid cooling connection pipe 100 is used to connect to the backup branch pipe 400. The second port 302 and the third port 303 of the first tee pipe 3 of the liquid cooling connection pipe 100 are used to connect to a target branch pipe, which is any branch pipe 300 adjacent to the faulty main valve 210.

[0138] During the repair of the faulty main valve 210, the first valve 2 of the liquid cooling connection pipeline 100 is opened, and the backup branch pipeline 400 is connected. After the repair of the faulty main valve 210 is completed, the target branch pipeline is connected, the first valve 2 and the first tee pipe 3 remain in the liquid cooling system, and the first valve 2 is closed.

[0139] For details on liquid cooling systems, please refer to the previous text; they will not be repeated here.

[0140] It should be noted that in this embodiment, the first tee pipe 3, the second tee pipe 4, and the third tee pipe 7 can be a straight tee pipe, a 45° angled tee pipe, a 60° angled tee pipe, or a U-shaped tee pipe. The specific type mainly depends on the angle between the target branch pipe and the main connecting pipe, as well as the installation space. The main valve 210, the first valve 2, the second valve 10, the third valve 11, the fourth valve 12, and the exhaust valve 9 can be ball valves, gate valves, butterfly valves, globe valves, or piston valves, etc.

[0141] This disclosure also provides a data center, such as... Figure 16 As shown, the data center includes the aforementioned liquid cooling system.

[0142] The servers in the data center racks can be any type of server; for example, they can be the high-density servers mentioned above, or ordinary servers.

[0143] This disclosure also provides a maintenance method, which is applied to the aforementioned liquid cooling system, such as... Figure 17 As shown, the repair method includes the following steps:

[0144] In step 1701, the target branch line is shut off. For example, the branch line valve in the target branch line is closed.

[0145] At this time, the liquid cooling of the cabinet connected to the target branch pipe is abnormal, and the fault domain includes one cabinet.

[0146] In some examples, valves in branch lines connected to the target branch line can also be closed. For instance, when the target branch line is supply branch line 300a, valves in return branch line 300b connected to supply branch line 300a can also be closed. As another example, when the target branch line is return branch line 300b, valves in supply branch line 300a connected to return branch line 300b can also be closed.

[0147] In step 1702, the second end of the main connecting pipe 1 of the liquid cooling connecting pipe 100 is connected to the spare branch pipe 400, and the second port 302 and the third port 303 of the first tee pipe 3 of the liquid cooling connecting pipe 100 are connected to the target branch pipe.

[0148] For example, when the branch pipe 300 includes a first pipe 310, a branch pipe valve 320 and a second pipe 330 connected in sequence, the second port 302 and the third port 303 of the first tee pipe 3 of the liquid cooling connection pipe 100 can be connected to the target branch pipe by connecting the second port 302 to the branch pipe valve 320 and connecting the third port 303 to the second pipe 330.

[0149] In step 1703, the standby branch line 400 is connected, and the first valve 2 of the liquid cooling connection line 100 is opened.

[0150] In this way, the cabinet connected to the target branch pipe can be liquid cooled through the backup branch pipe 400, and the fault domain does not include the cabinet.

[0151] In some examples, where the liquid-cooled connection pipe 100 includes a second tee pipe 4, to avoid a pressure drop in the liquid-cooled system, the replenishment source 6 can be controlled to replenish liquid into the main connection pipe 1 before the backup branch pipe 400 is connected. For example, the liquid can be replenished until the pressure in the main connection pipe 1 is the same as the pressure in the main loop pipe 200.

[0152] Additionally, if the valve in the branch line connected to the target branch line was previously closed, then the valve in that branch line must be opened.

[0153] In step 1704, the main valves 210 on both sides of the faulty main valve 210 are closed.

[0154] At this point, the two cabinets between the main valves 210 on both sides cannot achieve liquid cooling through the corresponding branch pipes, but one of the cabinets has already achieved liquid cooling through the backup branch pipe 400. The fault domain includes one cabinet.

[0155] In step 1705, the faulty main valve 210 is repaired.

[0156] For example, replace the faulty main valve 210.

[0157] In step 1706, after the faulty main valve 210 is repaired, the first valve 2 is closed, the target branch pipeline is connected, and the main valves 210 on both sides of the faulty main valve 210 are opened.

[0158] At this point, the liquid cooling system returned to normal operation.

[0159] In some examples, after closing the first valve 2, only the first valve 2 and the first tee pipe 3 can be left in the liquid cooling system, while the rest of the liquid cooling connection pipe 100 is removed from the liquid cooling system.

[0160] In the case where the liquid-cooled connection pipeline 100 includes a third valve 11 and a fourth valve 12, to prevent leakage of the liquid coolant in the main connection pipeline 1 during disassembly, the third valve 11 and the fourth valve 12 can be closed first, and the third valve 11 can be separated from the first valve 2, while the fourth valve 12 can be separated from the spare branch pipeline 400. Thus, the main connection pipeline 1, along with the third valve 11 and the fourth valve 12, can be disassembled from the liquid-cooling system.

[0161] It should be noted that detailed information on repair methods can be found in the previous text, and will not be repeated here.

[0162] The terminology used in the embodiments of this disclosure is for illustrative purposes only and is not intended to limit the disclosure. Unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure should be understood in their ordinary sense by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar words used in this specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "a" or "one," and similar words do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising," "including," and similar words mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, but do not exclude other elements or objects. "Upper," "lower," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly. "A plurality" refers to two or more, unless otherwise expressly defined.

[0163] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A liquid-cooled connection pipeline, characterized in that, The liquid cooling connection pipeline is used in the liquid cooling system, which includes a main loop pipeline (200), multiple branch pipelines (300) and a spare branch pipeline (400). One end of each of the multiple branch pipelines (300) is connected to the main loop pipeline (200), and the other end is used to connect to the cabinet. A main valve (210) is provided between two adjacent branch pipelines (300) on the main loop pipeline (200). The spare branch pipeline (400) is connected to the main loop pipeline (200). The liquid cooling connection pipeline (100) includes a main connection pipeline (1), a first valve (2) and a first tee pipe (3); The first end of the main connecting pipe (1) is connected to one end of the first valve (2), and the other end of the first valve (2) is connected to the first port (301) of the first tee pipe (3); The second end of the main connecting pipe (1) is used to connect with the backup branch pipe (400); The second port (302) and the third port (303) of the first tee pipe (3) are used to connect to the target branch pipe, which is any branch pipe (300) adjacent to the faulty main valve (210). During the repair of the faulty main valve (210), the first valve (2) is opened and the backup branch pipe (400) is connected. After the repair of the faulty main valve (210) is completed, the target branch pipe is connected, the first valve (2) and the first tee pipe (3) remain in the liquid cooling system, and the first valve (2) is closed.

2. The liquid-cooled connection pipeline according to claim 1, characterized in that, After the main valve (210) that caused the malfunction was repaired, the main connecting pipe (1) was removed from the liquid cooling system.

3. The liquid-cooled connection pipeline according to claim 1, characterized in that, The liquid cooling connection pipeline (100) also includes a second tee pipe (4), the fourth port (401) and the fifth port (402) of the second tee pipe (4) are connected in the main connection pipeline (1); The sixth port (403) of the second three-way pipe (4) is used to connect with the liquid replenishment source (6), which is used to replenish the main connecting pipe (1) before the liquid cooling working fluid flows into the liquid cooling system.

4. The liquid-cooled connection pipeline according to claim 3, characterized in that, The replenishment source (6) is used to replenish the main connecting pipe (1) to the pressure in the main connecting pipe (1) so that the pressure in the main connecting pipe (1) is consistent with the pressure in the main loop pipe (200) of the liquid cooling system.

5. The liquid-cooled connection pipeline according to claim 3, characterized in that, The liquid cooling connection pipeline (100) also includes a liquid replenishment pipeline (5) and a liquid replenishment source (6). One end of the liquid replenishment pipeline (5) is connected to the sixth port (403), and the other end is connected to the liquid replenishment source (6).

6. The liquid-cooled connection pipeline according to any one of claims 1-5, characterized in that, The liquid cooling connection pipeline (100) also includes a third tee pipe (7), an exhaust pipe (8), and an exhaust valve (9). The seventh port (701) and the eighth port (702) of the third tee pipe (7) are connected in the main connecting pipe (1); One end of the exhaust pipe (8) is connected to the ninth port (703) of the third three-way pipe (7), and the other end is connected to the exhaust valve (9).

7. The liquid-cooled connection pipeline according to claim 6, characterized in that, The liquid cooling connection pipeline (100) also includes a second valve (10), which is disposed on the exhaust pipeline (8).

8. The liquid-cooled connection pipeline according to any one of claims 1-5, characterized in that, The liquid cooling connection pipeline (100) also includes a third valve (11) and a fourth valve (12). One end of the third valve (11) is connected to the first end of the main connecting pipeline (1), and the other end is connected to the first valve (2); One end of the fourth valve (12) is connected to the second end of the main connecting pipeline (1), and the other end is used to connect to the spare branch pipeline (400); During the disassembly of the liquid cooling connection pipeline (100), the third valve (11) and the fourth valve (12) are closed to prevent the liquid cooling working fluid from leaking from the main connection pipeline (1).

9. The liquid-cooled connection pipeline according to any one of claims 1-5, characterized in that, The liquid cooling connection pipeline (100) also includes an end cap (13), which closes each opening of the liquid cooling connection pipeline (100).

10. The liquid-cooled connection pipeline according to any one of claims 1-5, characterized in that, The liquid cooling connection pipeline (100) also includes clamps (14), which connect the various components of the liquid cooling connection pipeline (100).

11. The liquid-cooled connection pipeline according to any one of claims 1-5, characterized in that, The branch pipeline (300) includes a first pipeline (310), a branch pipeline valve (320), and a second pipeline (330) connected in sequence. The first pipe (310) is connected to the main loop pipe (200) of the liquid cooling system, and the second pipe (330) is used to connect to the cabinet; The second port (302) and the third port (303) of the first tee pipe (3) are used to connect between the branch valve (320) and the second pipe (330) of the target branch pipe.

12. The liquid-cooled connection pipeline according to any one of claims 1-5, characterized in that, The faulty main valve (210) is located in the main supply loop (200a), the branch line (300) is the supply branch line (300a), and the standby branch line (400) is the supply standby branch line (400a); or, The faulty main valve (210) is located in the return main loop (200b), the branch pipe (300) is the return branch pipe (300b), and the standby branch pipe (400) is the return standby branch pipe (400b).

13. A liquid cooling system, characterized in that, The liquid cooling system includes a main loop (200), multiple branch loops (300), a spare branch loop (400), and a liquid cooling connection loop (100) as described in any one of claims 1-12. One end of each of the multiple branch pipes (300) is connected to the main ring pipe (200), and the other end is used to connect to the cabinet. A main valve (210) is provided between two adjacent branch pipes (300) on the main ring pipe (200). One end of the backup branch pipeline (400) is connected to the main ring pipeline (200); The second end of the main connecting pipe (1) of the liquid cooling connecting pipe (100) is used to connect with the backup branch pipe (400). The second port (302) and the third port (303) of the first tee pipe (3) of the liquid cooling connecting pipe (100) are used to connect to the target branch pipe, which is any branch pipe (300) adjacent to the faulty main valve (210). During the repair of the faulty main valve (210), the first valve (2) of the liquid cooling connection pipeline (100) is opened, and the backup branch pipeline (400) is connected. After the repair of the faulty main valve (210) is completed, the target branch pipeline is connected, the first valve (2) and the first tee pipe (3) remain in the liquid cooling system, and the first valve (2) is closed.

14. A data center, characterized in that, The data center includes the liquid cooling system as described in claim 13.

15. A repair method, characterized in that, The repair method is applied to the liquid cooling system as described in claim 13, and the repair method includes: Shut down the target branch pipeline; Connect the second end of the main connecting pipe (1) of the liquid cooling connecting pipe (100) to the spare branch pipe (400), and connect the second port (302) and the third port (303) of the first tee pipe (3) of the liquid cooling connecting pipe (100) to the target branch pipe; Connect the backup branch line (400) and open the first valve (2) of the liquid cooling connection line (100); Close the main valves (210) on both sides of the main valve (210) that caused the fault; Repair the faulty main valve (210); After the faulty main valve (210) is repaired, the first valve (2) is closed, the target branch pipeline is connected, and the main valves (210) on both sides of the faulty main valve (210) are opened.

16. The repair method according to claim 15, characterized in that, When the branch pipeline (300) includes a first pipeline (310), a branch pipeline valve (320), and a second pipeline (330) connected in sequence, connecting the second port (302) and the third port (303) of the first tee pipe (3) of the liquid cooling connection pipeline (100) to the target branch pipeline includes: The second port (302) and the third port (303) are connected between the branch valve (320) and the second pipeline (330).

17. The repair method according to claim 15 or 16, characterized in that, When the liquid-cooled connection pipe (100) further includes a second tee pipe (4), before connecting the spare branch pipe (400), the method further includes: The replenishment source (6) replenishes the main connecting pipeline (1) with liquid.

18. The repair method according to claim 15 or 16, characterized in that, After closing the first valve (2), the method further includes: Disconnect the main connecting pipe (1) from the liquid cooling system.

19. The maintenance method according to claim 18, characterized in that, When the liquid cooling connection pipeline (100) further includes a third valve (11) and a fourth valve (12), the disassembly of the main connection pipeline (1) from the liquid cooling system includes: Close the third valve (11) and the fourth valve (12); Separate the third valve (11) from the first valve (2) and separate the fourth valve (12) from the spare branch line (400).

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