A method for rapid flushing of a liquid-cooled data center piping system

Abstract

The application discloses a liquid cooling data center pipeline system technical field, and relates to a kind of liquid cooling data center pipeline system's quick flushing method, including once side pipeline flushing and two secondary side pipeline flushing, by periodically opening and closing once side liquid supply pipe stop valve A and once side liquid supply pipe stop valve B, once side liquid return pipe stop valve A and once side liquid return pipe stop valve B, realize the periodic switching of the flow direction of flushing water in once side pipeline, complete the quick and comprehensive flushing of once side pipeline;By periodically opening and closing secondary side liquid supply pipe stop valve A and secondary side liquid supply pipe stop valve B, secondary side flushing drain valve A and secondary side flushing drain valve B, realize the periodic conversion of the flow direction of flushing water in secondary side pipeline, complete the quick and comprehensive flushing of secondary side pipeline, so as to ensure that pipeline is fully flushed, no blind area is left, improve the pipeline system flushing quality, guarantee the safe operation of liquid cooling data center.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid-cooled data center piping system, and particularly relates to a quick flushing method of liquid-cooled data center piping system. BACKGROUND

[0002] The refrigeration system of the liquid-cooled data center comprises a primary side (cooling water circulation) and a secondary side (cooling liquid circulation), wherein the secondary side is responsible for transferring heat from the heat source (CPU, GPU, etc.) to the cooling liquid, the primary side is responsible for transferring heat from the cooling water to the external environment, and the cold distribution unit (CDU) is responsible for transferring heat in the cooling liquid of the secondary side to the cooling water of the primary side.

[0003] Generally, after the construction of the refrigeration system of the liquid-cooled data center is completed, there are relatively many sundries in the pipeline. First, the inner wall cleaning work is not done well before the pipeline is installed, and iron rust, soil and other sundries are left in the pipeline. Second, the pipeline is usually connected by welding, so there are many welding slag and metal particles in the pipeline. Based on the above reasons, the quick flushing of the liquid-cooled data center piping system is very important. If the flushing of the pipeline is ignored, the refrigeration effect of the system will be reduced, and the equipment will be destroyed.

[0004] At present, the existing technical solution is that the central air conditioner and the air-cooled data center adopt a closed recirculation flushing method to flush the water pipeline of the refrigeration system, that is, the pipeline system is filled with water, the connection between the pipeline and the equipment is cut off, the water pump is used to circulate the water in the pipeline, and the necessary flushing flow rate is reached. The system pipeline is subjected to multiple cycle flushing and sewage discharge operations until the pipeline meets the flushing quality requirements.

[0005] The disadvantages of the prior art are that the above-mentioned closed recirculation pipeline flushing scheme adopts one-way system flushing, that is, the water flow is always in the same direction during the flushing process. When the pipeline is flushed using the above-mentioned scheme, slow or stationary pressure balance areas are easily formed in the pipeline. The slow or stationary water flow in the areas easily causes incomplete flushing of some pipeline sections. In addition, the above-mentioned closed recirculation pipeline flushing scheme is currently only used for flushing the water pipeline of the central air conditioner and the air-cooled data center. In recent years, the liquid-cooled data center has realized large-scale commercial use. The cooling liquid of the secondary side is closer to the server, and even directly contacts the server, so the cleanliness of the system pipeline is required to be higher. At present, there is no mature scheme for flushing the pipeline of the liquid-cooled data center air conditioning system.

[0006] Based on this, a quick flushing method of liquid-cooled data center piping system is proposed. SUMMARY

[0007] The purpose of the present application is to overcome the above-mentioned problems existing in the prior art, provide a quick flushing method for liquid-cooled data center pipeline system, and ensure that all pipelines are fully flushed without leaving any blind area by periodically changing the flushing water flow direction during the flushing process, thereby improving the pipeline system flushing quality and ensuring the safe operation of the liquid-cooled data center.

[0008] To achieve the above technical purposes and effects, the present application is implemented by the following technical solutions:

[0009] A quick flushing method for liquid-cooled data center pipeline system, including primary side pipeline flushing and secondary side pipeline flushing, and further including primary side flushing pump, primary side flushing water supplement pipe, primary side isolation stop valve, primary side flushing drain valve, primary side flushing drain pipe, primary side liquid supply pipe stop valve A, primary side liquid supply pipe stop valve B, primary side liquid return pipe stop valve A, primary side liquid return pipe stop valve B, cooling tower, secondary side flushing pump, secondary side flushing liquid supplement pipe, secondary side liquid return pipe stop valve A, secondary side liquid return pipe stop valve B, secondary side liquid supply pipe stop valve A, secondary side liquid supply pipe stop valve B, secondary side flushing drain valve A, secondary side flushing drain pipe A, CDU primary side bypass valve, CDU secondary side bypass valve, liquid cooling module bypass valve, cooling tower bypass valve, secondary side flushing drain valve B, secondary side flushing drain pipe B, and the specific operation steps are as follows:

[0010] S1: when flushing the primary side pipeline, close the primary side isolation stop valve, open the cooling tower bypass valve to short-circuit the inlet and outlet of the cooling tower, open the CDU primary side bypass valve to short-circuit the inlet and outlet of the CUD primary side, open the primary side flushing pump, and the primary side flushing pump sends flushing water into the primary side pipeline through the primary side flushing water supplement pipe, opens the primary side liquid supply pipe stop valve A and closes the primary side liquid supply pipe stop valve B to make the flushing water in the primary side liquid supply pipe flow counterclockwise, closes the primary side liquid supply pipe stop valve A and opens the primary side liquid supply pipe stop valve B after a period of time to make the flushing water in the primary side liquid supply pipe flow clockwise, and the clockwise and counterclockwise flushing water flow directions in the primary side liquid supply pipe are periodically switched in this way;

[0011] open the primary side liquid return pipe stop valve A and close the primary side liquid return pipe stop valve B to make the flushing water in the primary side liquid return pipe flow clockwise, close the primary side liquid return pipe stop valve A and open the primary side liquid return pipe stop valve B after a period of time to make the flushing water in the primary side liquid return pipe flow counterclockwise, and the clockwise and counterclockwise flushing water flow directions in the primary side liquid return pipe are periodically switched in this way; open the primary side flushing drain valve, and the sewage after the flushing pipeline is drained to the drain through the primary side flushing drain pipe;

[0012] S2: when the secondary side pipeline flushing is performed, the CDU secondary side bypass valve is opened to short-circuit the CUD secondary side inlet and outlet liquid ports, the liquid cooling module bypass valve is opened to short-circuit the liquid cooling module inlet and outlet liquid ports, the secondary side liquid return pipe stop valve A and the secondary side liquid return pipe stop valve B are closed, the secondary side flushing pump is opened, the flushing liquid is sent into the secondary side water return pipeline through the secondary side flushing liquid supplement pipeline, the flushing liquid in the secondary side water return pipeline flows into the secondary side liquid supply pipeline through the secondary side bypass valve, the secondary side liquid supply pipeline stop valve A is opened and the secondary side liquid supply pipeline stop valve B is closed, so that the flushing water in the secondary side liquid supply pipeline flows clockwise, after a period of time, the secondary side liquid supply pipeline stop valve A is closed and the secondary side liquid supply pipeline stop valve B is opened, so that the flushing water in the secondary side liquid supply pipeline flows counterclockwise, and the switching is repeated to realize the periodic switching of the flushing liquid flow direction in the secondary side liquid supply pipeline clockwise and counterclockwise;

[0013] The secondary side flushing liquid discharge valve A is opened, and the secondary side flushing liquid discharge valve B is closed, the flushing liquid in the secondary side liquid return pipe flows along the clockwise direction through the secondary side flushing liquid discharge pipe A to the liquid discharge port, after a period of time, the secondary side flushing liquid discharge valve A is closed, and the secondary side flushing liquid discharge valve B is opened, the flushing liquid in the secondary side liquid return pipe flows along the counterclockwise direction through the secondary side flushing liquid discharge pipe B to the liquid discharge port, and the switching is repeated to realize the periodic switching of the flushing liquid flow direction in the secondary side liquid return pipe clockwise and counterclockwise;

[0014] S3: when the flushing sewage discharged by the primary side flushing liquid discharge pipe, the secondary side flushing liquid discharge pipe A and the secondary side flushing liquid discharge pipe B reaches the water quality requirement, the primary side pipeline flushing and the secondary side pipeline flushing are completed, and all the valves return to the initial state.

[0015] Preferably, the primary side pipeline includes a primary side liquid supply pipeline and a primary side liquid return pipeline, the primary side liquid supply pipeline stop valve A and the primary side liquid supply pipeline stop valve B are arranged in the primary side liquid supply pipeline, the primary side liquid supply pipeline is flushed quickly and comprehensively by periodically and alternately opening and closing the primary side liquid supply pipeline stop valve A and the primary side liquid supply pipeline stop valve B to realize the periodic switching of the flushing water flow direction in the primary side liquid supply pipeline; the primary side liquid return pipeline stop valve A and the primary side liquid return pipeline stop valve B are arranged in the primary side liquid return pipeline, and the primary side liquid return pipeline is flushed quickly and comprehensively by periodically and alternately opening and closing the primary side liquid return pipeline stop valve A and the primary side liquid return pipeline stop valve B to realize the periodic switching of the flushing water flow direction in the primary side liquid return pipeline.

[0016] Preferably, the primary side flushing liquid supplement pipe and the primary side flushing liquid discharge pipe are respectively located on the two sides of the primary side isolation stop valve, and when the primary side isolation stop valve is closed, the primary side flushing liquid supplement pipe and the primary side flushing liquid discharge pipe are isolated.

[0017] Preferably, the secondary side pipeline comprises a secondary side liquid supply pipeline and a secondary side liquid return pipeline, the secondary side liquid supply pipeline is provided with the secondary side liquid supply pipeline stop valve A and the secondary side liquid supply pipeline stop valve B, and the secondary side liquid return pipeline is provided with the secondary side liquid return pipeline stop valve A and the secondary side liquid return pipeline stop valve B; when the secondary side liquid return pipeline is flushed, the secondary side liquid return pipeline stop valve A and the secondary side liquid return pipeline stop valve B are both in a closed state.

[0018] Preferably, after the secondary side liquid return pipeline stop valve A and the secondary side liquid return pipeline stop valve B are simultaneously closed, the secondary side flushing liquid supplement pipeline is isolated from the secondary side flushing liquid discharge pipeline A and the secondary side flushing liquid discharge pipeline B on both sides and is not communicated.

[0019] Preferably, after the secondary side liquid return pipeline stop valve A and the secondary side liquid return pipeline stop valve B are simultaneously closed, the secondary side flushing liquid supplement pipeline is located on the same side as the CDU, and the secondary side liquid return pipeline stop valve A and the secondary side liquid return pipeline stop valve B are arranged close to the CDU.

[0020] Preferably, after the secondary side liquid return pipeline stop valve A and the secondary side liquid return pipeline stop valve B are simultaneously closed, the secondary side flushing liquid discharge pipeline A and the secondary side flushing liquid discharge pipeline B are located on the same side as the liquid cooling module.

[0021] In summary, the present application has at least one beneficial effect: the present application uses an independent flushing pump to send water into the pipeline, periodically changes the flow direction of the flushing water in the pipeline by alternating opening and closing of different valves, can quickly complete the flushing work of the liquid cooling data center pipeline, and can ensure that the pipeline is fully flushed without leaving any blind area, improves the pipeline system flushing quality, and ensures the safe operation of the liquid cooling data center. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a use state structure schematic diagram of the present application;

[0023] In the drawings, the components represented by each reference numeral are listed as follows:

[0024] 1- Primary flushing pump, 2- Primary flushing water supply pipe, 3- Primary side isolation shut-off valve, 4- Primary flushing drain valve, 5- Primary flushing drain pipe, 6- Primary side supply pipe shut-off valve A, 7- Primary side supply pipe shut-off valve B, 8- Primary side return pipe shut-off valve A, 9- Primary side return pipe shut-off valve B, 10- Cooling tower, 11- Secondary flushing pump, 12- Secondary flushing water supply pipe, 13- Secondary side return pipe shut-off valve A, 14- Secondary side return pipe shut-off valve B, 15- Secondary side supply pipe shut-off valve A, 16- Secondary side supply pipe shut-off valve B, 17- Secondary flushing drain valve A, 18- Secondary flushing drain pipe A, 19- CDU primary side bypass valve, 20- CDU secondary side bypass valve, 21- Liquid cooling module bypass valve, 22- Cooling tower bypass valve, 23- Secondary side flushing drain valve B, 24- Secondary side flushing drain pipe B. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1 The present invention will be described in further detail below.

[0026] One embodiment provided by the present invention: as follows Figure 1 As shown, a rapid flushing method for a liquid-cooled data center piping system includes two parts: primary side piping flushing and secondary side piping flushing. It also includes a primary side flushing pump 1, a primary side flushing water supply pipe 2, a primary side isolation shut-off valve 3, a primary side flushing drain valve 4, a primary side flushing drain pipe 5, a primary side supply pipe shut-off valve A6, a primary side supply pipe shut-off valve B7, a primary side return pipe shut-off valve A8, a primary side return pipe shut-off valve B9, a cooling tower 10, and a secondary side flushing pump 11. The equipment used includes: secondary side flushing replenishment pipe 12, secondary side return pipe shut-off valve A13, secondary side return pipe shut-off valve B14, secondary side supply pipe shut-off valve A15, secondary side supply pipe shut-off valve B16, secondary side flushing drain valve A17, secondary side flushing drain pipe A18, CDU primary side bypass valve 19, CDU secondary side bypass valve 20, liquid cooling module bypass valve 21, cooling tower bypass valve 22, secondary side flushing drain valve B23, and secondary side flushing drain pipe B24.

[0027] When the primary side pipeline flushing begins, the cooling tower bypass valve 22 and the CDU primary side bypass valve 19 must be in the open state to disconnect the primary side flushing pipeline from the cooling tower 10 and CDU and other equipment.

[0028] When the secondary side pipeline flushing begins, the CDU secondary side bypass valve 20 and the liquid cooling module bypass valve 21 must be in the open state to disconnect the secondary side flushing pipeline from the CDU and liquid cooling module and other equipment.

[0029] The primary side pipeline includes a primary side liquid supply pipeline and a primary side liquid return pipeline, and a primary side liquid supply pipeline stop valve A6 and a primary side liquid supply pipeline stop valve B7 are arranged in the primary side liquid supply pipeline; by periodically opening and closing the primary side liquid supply pipeline stop valve A6 and the primary side liquid supply pipeline stop valve B7, the flow direction of the flushing water in the primary side liquid supply pipeline is periodically switched, and the primary side liquid supply pipeline is rapidly and comprehensively flushed;

[0030] The primary side liquid return pipeline stop valve A8 and the primary side liquid return pipeline stop valve B9 are arranged in the primary side liquid return pipeline; by periodically opening and closing the primary side liquid return pipeline stop valve A8 and the primary side liquid return pipeline stop valve B9, the flow direction of the flushing water in the primary side liquid return pipeline is periodically switched, and the primary side liquid return pipeline is rapidly and comprehensively flushed;

[0031] The primary side flushing water supply pipe 2 and the primary side flushing liquid discharge pipe 5 are located on both sides of the primary side isolation stop valve 3; when the primary side isolation stop valve 3 is closed, the primary side flushing water supply pipe 2 and the primary side flushing liquid discharge pipe 5 are isolated;

[0032] The secondary side pipeline includes a secondary side liquid supply pipeline and a secondary side liquid return pipeline, and a secondary side liquid supply pipeline stop valve A15 and a secondary side liquid supply pipeline stop valve B16 are arranged in the secondary side liquid supply pipeline; by periodically opening and closing the secondary side liquid supply pipeline stop valve A15 and the secondary side liquid supply pipeline stop valve B16, the flow direction of the flushing liquid in the secondary side liquid supply pipeline is periodically switched, and the secondary side liquid supply pipeline is rapidly and comprehensively flushed;

[0033] The secondary side liquid return pipeline stop valve A13 and the secondary side liquid return pipeline stop valve B14 are arranged in the secondary side liquid return pipeline; when the secondary side liquid return pipeline is flushed, the secondary side liquid return pipeline stop valve A13 and the secondary side liquid return pipeline stop valve B14 are both closed; then by periodically opening and closing the secondary side flushing liquid discharge valve A17 and the secondary side flushing liquid discharge valve B23, the flow direction of the flushing liquid in the secondary side liquid return pipeline is periodically switched, and the secondary side liquid return pipeline is rapidly and comprehensively flushed;

[0034] After the secondary side liquid return pipeline stop valve A13 and the secondary side liquid return pipeline stop valve B14 are closed, the secondary side flushing liquid supply pipe 12 is isolated from the secondary side flushing liquid discharge pipe A18 and the secondary side flushing liquid discharge pipe B24 on both sides;

[0035] After the secondary side liquid return pipeline stop valve A13 and the secondary side liquid return pipeline stop valve B14 are closed, the secondary side flushing liquid supply pipe 12 is located on the same side as the CDU, and the secondary side liquid return pipeline stop valve A13 and the secondary side liquid return pipeline stop valve B14 are arranged close to the CDU;

[0036] When the secondary side liquid return pipe stop valve A13 and the secondary side liquid return pipe stop valve B14 are closed at the same time, the secondary side flushing and liquid discharge pipe A18, the secondary side flushing and liquid discharge pipe B24 and the liquid cooling module are located on the same side;

[0037] The specific operation steps are:

[0038] S1: When flushing the primary side pipeline, close the primary side isolation stop valve 3, open the cooling tower bypass valve 22 to short-circuit the inlet and outlet of the cooling tower 10, open the CDU primary side bypass valve 19 to short-circuit the inlet and outlet of the CUD primary side, open the primary side flushing pump 1, and the primary side flushing pump 1 sends flushing water into the primary side pipeline through the primary side flushing water supply pipe 2, opens the primary side liquid supply pipe stop valve A6 and closes the primary side liquid supply pipe stop valve B7, so that the flushing water in the primary side liquid supply pipe flows counterclockwise, after a period of time (the time interval can be lengthened or shortened according to actual conditions), closes the primary side liquid supply pipe stop valve A6 and opens the primary side liquid supply pipe stop valve B7, so that the flushing water in the primary side liquid supply pipe flows clockwise, and the switching is repeated in this way, realizing the periodic switching of the clockwise and counterclockwise flow directions of the flushing water in the primary side liquid supply pipe;

[0039] opens the primary side liquid return pipe stop valve A8 and closes the primary side liquid return pipe stop valve B9, so that the flushing water in the primary side liquid return pipe flows clockwise, after a period of time (the time interval can be lengthened or shortened according to actual conditions), closes the primary side liquid return pipe stop valve A8 and opens the primary side liquid return pipe stop valve B9, so that the flushing water in the primary side liquid return pipe flows counterclockwise, and the switching is repeated in this way, realizing the periodic switching of the clockwise and counterclockwise flow directions of the flushing water in the primary side liquid return pipe; opens the primary side flushing and liquid discharge valve 4, and the sewage after the flushing pipeline is discharged to the liquid discharge port through the primary side flushing and liquid discharge pipe 5;

[0040] S2: When flushing the secondary side pipeline, open the CDU secondary side bypass valve 20 to short-circuit the inlet and outlet of the CUD secondary side, open the liquid cooling module bypass valve 21 to short-circuit the inlet and outlet of the liquid cooling module, close the secondary side liquid return pipe stop valve A13 and the secondary side liquid return pipe stop valve B14, open the secondary side flushing pump 11, and the secondary side flushing pump 11 sends flushing liquid into the secondary side liquid return pipeline through the secondary side flushing liquid supply pipe 12, the flushing liquid in the secondary side liquid return pipeline flows into the secondary side liquid supply pipe through the secondary side bypass valve 20, opens the secondary side liquid supply pipe stop valve A15 and closes the secondary side liquid supply pipe stop valve B16, so that the flushing water in the secondary side liquid supply pipe flows clockwise, after a period of time (the time interval can be lengthened or shortened according to actual conditions), closes the secondary side liquid supply pipe stop valve A15 and opens the secondary side liquid supply pipe stop valve B16, so that the flushing water in the secondary side liquid supply pipe flows counterclockwise, and the switching is repeated in this way, realizing the periodic switching of the clockwise and counterclockwise flow directions of the flushing liquid in the secondary side liquid supply pipe;

[0041] The secondary side flushing liquid valve A17 is opened, the secondary side flushing liquid valve B23 is closed, the flushing liquid in the secondary side liquid return pipe is discharged to the liquid discharge port along the clockwise direction through the secondary side flushing liquid pipe A18, after a period of time (the time interval can be lengthened or shortened according to the actual situation), the secondary side flushing liquid valve A17 is closed, the secondary side flushing liquid valve B23 is opened, the flushing liquid in the secondary side liquid return pipe is discharged to the liquid discharge port along the counterclockwise direction through the secondary side flushing liquid pipe B24, and the above-mentioned switching is repeated to realize the periodic switching of the clockwise and counterclockwise flow directions of the flushing liquid in the secondary side liquid return pipe.

[0042] S3: When the flushing sewage discharged by the primary side flushing liquid pipe 5, the secondary side flushing liquid pipe A18 and the secondary side flushing liquid pipe B24 reaches the water quality requirement, the primary side pipeline flushing and the secondary side pipeline flushing are ended, and all the valves return to the initial state.

[0043] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A rapid flushing method for a liquid-cooled data center piping system, comprising two parts: primary side piping flushing and secondary side piping flushing, and further comprising a primary side flushing pump (1), a primary side flushing water supply pipe (2), a primary side isolation shut-off valve (3), a primary side flushing drain valve (4), a primary side flushing liquid drain pipe (5), a primary side liquid supply pipe shut-off valve A (6), a primary side liquid supply pipe shut-off valve B (7), a primary side liquid return pipe shut-off valve A (8), a primary side liquid return pipe shut-off valve B (9), a cooling tower (10), a secondary side flushing pump (11), and a secondary side flushing water supply system. The equipment used, including pipe (12), secondary side return pipe shut-off valve A (13), secondary side return pipe shut-off valve B (14), secondary side supply pipe shut-off valve A (15), secondary side supply pipe shut-off valve B (16), secondary side flushing drain valve A (17), secondary side flushing drain pipe A (18), CDU primary side bypass valve (19), CDU secondary side bypass valve (20), liquid cooling module bypass valve (21), cooling tower bypass valve (22), secondary side flushing drain valve B (23), and secondary side flushing drain pipe B (24), is characterized by: The specific operating steps are as follows: S1: When flushing the primary side pipeline, close the primary side isolation shut-off valve (3), open the cooling tower bypass valve (22) to short-circuit the inlet and outlet of the cooling tower (10), open the CDU primary side bypass valve (19) to short-circuit the CUD primary side inlet and outlet, open the primary side flushing pump (1), the primary side flushing pump (1) sends the flushing water into the primary side pipeline through the primary side flushing water supply pipe (2), open the primary side liquid supply pipe shut-off valve A (6) and close the primary side liquid supply pipe shut-off valve B (7) to make the flushing water in the primary side liquid supply pipe flow counterclockwise, close the primary side liquid supply pipe shut-off valve A (6) and open the primary side liquid supply pipe shut-off valve B (7) after a period of time to make the flushing water in the primary side liquid supply pipe flow clockwise, and so on, to achieve the periodic switching of the flushing water flow direction in the primary side liquid supply pipe clockwise and counterclockwise; Open the primary side return pipe shut-off valve A (8) and close the primary side return pipe shut-off valve B (9) to make the flushing water in the primary side return pipe flow clockwise. After a period of time, close the primary side return pipe shut-off valve A (8) and open the primary side return pipe shut-off valve B (9) to make the flushing water in the primary side return pipe flow counterclockwise. Repeat this switching to achieve the periodic switching of the flushing water flow direction in the primary side return pipe between clockwise and counterclockwise. Open the primary side flushing drain valve (4) and the sewage after flushing the pipe is discharged to the drain outlet through the primary side flushing drain pipe (5). S2: When flushing the secondary side pipeline, open the CDU secondary side bypass valve (20) to short-circuit the CDU secondary side inlet and outlet, open the liquid cooling module bypass valve (21) to short-circuit the liquid cooling module inlet and outlet, close the secondary side return pipe shut-off valve A (13) and the secondary side return pipe shut-off valve B (14), and start the secondary side flushing pump (11). The secondary side flushing pump (11) sends the flushing liquid into the secondary side return water pipeline through the secondary side flushing replenishment pipe (12). The flushing liquid in the secondary side return water pipeline passes through the secondary side return water pipeline. The secondary bypass valve (20) flows into the secondary supply pipe, the secondary supply pipe stop valve A (15) is opened and the secondary supply pipe stop valve B (16) is closed, so that the flushing water in the secondary supply pipe flows clockwise. After a period of time, the secondary supply pipe stop valve A (15) is closed and the secondary supply pipe stop valve B (16) is opened, so that the flushing water in the secondary supply pipe flows counterclockwise. This switching is repeated to achieve the periodic switching of the flow direction of the flushing liquid in the secondary supply pipe between clockwise and counterclockwise. Open the secondary side flushing drain valve A (17) and close the secondary side flushing drain valve B (23). The flushing liquid in the secondary side return pipe is discharged to the drain port in a clockwise direction through the secondary side flushing drain pipe A (18). After a period of time, close the secondary side flushing drain valve A (17) and open the secondary side flushing drain valve B (23). The flushing liquid in the secondary side return pipe is discharged to the drain port in a counterclockwise direction through the secondary side flushing drain pipe B (24). Repeat this switching to achieve the periodic switching of the flow direction of the flushing liquid in the secondary side return pipe between clockwise and counterclockwise. S3: When the flushing wastewater discharged from the primary side flushing drain pipe (5), the secondary side flushing drain pipe A (18) and the secondary side flushing drain pipe B (24) meets the water quality requirements, the primary side pipeline flushing and the secondary side pipeline flushing are completed, and all valves are restored to their initial state. The primary side flushing water supply pipe (2) and the primary side flushing drain pipe (5) are located on both sides of the primary side isolation shut-off valve (3).

2. The rapid flushing method for a liquid-cooled data center piping system according to claim 1, characterized in that: The primary side pipeline includes a primary side supply pipeline and a primary side return pipeline. The primary side supply pipeline shut-off valve A (6) and the primary side supply pipeline shut-off valve B (7) are installed in the primary side supply pipeline; the primary side return pipeline shut-off valve A (8) and the primary side return pipeline shut-off valve B (9) are installed in the primary side return pipeline.

3. The rapid flushing method for a liquid-cooled data center piping system according to claim 1, characterized in that: The secondary side pipeline includes a secondary side liquid supply pipeline and a secondary side liquid return pipeline. The secondary side liquid supply pipeline shut-off valve A (15) and the secondary side liquid supply pipeline shut-off valve B (16) are installed in the secondary side liquid supply pipeline; the secondary side liquid return pipeline shut-off valve A (13) and the secondary side liquid return pipeline shut-off valve B (14) are installed in the secondary side liquid return pipeline.

4. The rapid flushing method for a liquid-cooled data center piping system according to claim 1, characterized in that: After the secondary side return pipe shut-off valve A (13) and the secondary side return pipe shut-off valve B (14) are closed at the same time, the secondary side flushing replenishment pipe (12) is isolated from the secondary side flushing drain pipe A (18) and the secondary side flushing drain pipe B (24) on both sides and is not connected.

5. A rapid flushing method for a liquid-cooled data center piping system according to claim 1, characterized in that: After the secondary side return pipe shut-off valve A (13) and the secondary side return pipe shut-off valve B (14) are closed at the same time, the secondary side flushing replenishment pipe (12) is located on the same side as the CDU, and the secondary side return pipe shut-off valve A (13) and the secondary side return pipe shut-off valve B (14) are arranged close to the CDU.

6. The rapid flushing method for a liquid-cooled data center piping system according to claim 1, characterized in that: After the secondary side return pipe shut-off valve A (13) and the secondary side return pipe shut-off valve B (14) are closed at the same time, the secondary side flushing drain pipe A (18) and the secondary side flushing drain pipe B (24) are located on the same side as the liquid cooling module.

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