Multi-equipment cooling water redundancy control supply device and method based on gravity flow

Abstract

The invention discloses a multi-equipment cooling water redundancy control supply device and method based on gravity flow, and solves the problem that cooling water cannot be normally supplied once a certain pneumatic stop valve of an existing cooling water system fails. The system specifically comprises a high-level water tank, a collecting water tank, a main pipeline, a control unit, a bypass control valve, at least one main path control valve and at least one standby control valve, the high-level water tank is arranged at a position higher than all to-be-cooled equipment; the input end of the bypass control valve, the input end of the main path control valve and the input end of the standby control valve are respectively communicated with the high-level water tank, and the output ends are respectively communicated with the main pipeline; a plurality of branch pipelines are arranged on the side wall of the main pipeline; a branch regulating valve is arranged on each branch pipeline; the control unit is respectively connected with the bypass control valve, the main path control valve and the standby control valve; an inlet of the collecting pool is communicated with a water outlet of each to-be-cooled device, and an outlet is communicated with the high-level pool through a water pump.

Description

Technical Field

[0001] The invention relates to a multi-device cooling device and method, and in particular to a multi-device cooling water redundant control supply device and method based on gravity flow. Background Art

[0002] With the further development of deep space exploration and high altitude domains, the performance requirements for attitude control engines are increasing day by day. More realistic environmental simulation tests are needed before engine flight verification. The sub-technologies involved, such as high altitude simulation test technology, high and low temperature test technology, and mechanical environment test, are gradually developing and becoming mature. Among them, high altitude simulation test is basically one of the necessary assessment tests in the development stage of engines of all magnitudes.

[0003] Traditional high-altitude simulation test benches can be divided into two categories according to the different ways of obtaining vacuum. One type is that small thrust engines mostly use a fully enclosed active suction and gas injection method. This type of test bench has a low demand for cooling water, and generally only supplies cooling water to active suction equipment (such as vacuum pump groups). The specific supply methods are diverse; the other type is mainly for second-stage and some third-stage engines with larger thrust. During the test, a diffuser is installed at the engine nozzle outlet to boost the gas pressure. This type of test bench is comprehensively classified according to the structure of the diffuser and the gas injection method, and is divided into diffuser open system, diffuser closed system, combined open system, and combined closed system.

[0004] From the current high-altitude simulation test system and design experience, a combined closed system that uses a steam generator to generate steam and steam injection to obtain vacuum is the most ideal means for long-range high-altitude simulation tests of larger thrust engines. This type of test bench has a very high demand for cooling water. When working, it must continuously supply cooling water that meets the corresponding pressure head and flow to the vacuum cabin, diffuser, water spray cooler, air collecting chamber, tube bundle cooler, jet pump group and other water-using equipment that constitute its gas injection system. The overall water flow is large and the pipeline specifications are large. In the past, its cooling water system mainly used the principle of head potential energy to supply cooling water to various water-using equipment through a high-level water tank, a water supply main line, a water collecting pipe, and a branch water collecting pipe. Two pneumatic stop valves (main supply line valve and its bypass line valve) and a throttling orifice assembly are independently set in front of the cooling water inlet of each device to control the circulation / blocking and flow regulation of the cooling water. The system has a large number of pneumatic stop valves, and their actions are controlled by the overall program of the gas injection system. The biggest advantage of this supply mode is that it uses a high-level water tank drop-type water supply to effectively ensure the continuous supply of large cooling water flows and pressure requirements. However, since each device uses an independent pneumatic stop valve to control the cooling water supply before the cooling water inlet, the risk of single-point failure in the system is greatly increased. If a pneumatic stop valve fails after the test program is started, the cooling water cannot be supplied normally, which will directly lead to abnormal temperature rise of related equipment and even cause expensive equipment ablation damage, seriously affecting the success of the high-altitude simulation test and the progress of model development. In addition, when the cooling water flow of each device needs to be adjusted due to changes in the test tasks, it is necessary to disassemble the throttling orifice assembly pipe section, replace the orifice plate, and debug the flow.

[0005] Therefore, ensuring a reliable and stable supply of cooling water to each device in the gas injection system is a key technology in the construction of the current engine high-altitude simulation test bench. Summary of the invention

[0006] In order to solve the technical problem that once a pneumatic stop valve in the existing cooling water system fails, cooling water cannot be supplied normally, which will directly lead to abnormal temperature rise of related equipment and even cause costly equipment to be ablated and damaged, seriously affecting the success of high-altitude simulation tests and the progress of model development, the present invention provides a redundant control and supply device and method for cooling water for multiple devices based on gravity flow.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A redundant control supply device for cooling water for multiple devices based on gravity flow, which is special in that it includes a high-level water tank, a collection water tank, a main pipeline, a control unit, a bypass control valve, at least one main control valve and at least one standby control valve;

[0009] The high-level water tank is arranged at a position higher than all the equipment to be cooled and is used to store cooling water;

[0010] The input end of the bypass control valve, the input end of the main control valve, and the input end of the standby control valve are respectively connected to the high-level water tank, and the output end of the bypass control valve, the output end of the main control valve, and the output end of the standby control valve are respectively connected to the main pipeline;

[0011] A plurality of branch pipes are provided on the side wall of the main pipe, which are used to respectively connect the cooling water inlets of the various devices to be cooled; each of the branch pipes is respectively provided with a branch regulating valve;

[0012] The control unit is connected to the bypass control valve, the main control valve and the standby control valve respectively, and is used to control the opening and closing of the bypass control valve, the main control valve and the standby control valve;

[0013] The inlet of the collection pool is communicated with the drain outlet of each device to be cooled, and the outlet is communicated with the high-level water pool through a water pump.

[0014] Furthermore, the collection pool is an open pool with an inlet facing upward;

[0015] The collection pool is arranged below each device to be cooled, and its opening corresponds to the drainage outlet of each device to be cooled.

[0016] Furthermore, the volume of the collection water tank is greater than the volume of the high-level water tank.

[0017] Furthermore, an overflow weir is provided in the collection pool, dividing the collection pool into a first small pool and a second small pool;

[0018] The top of the overflow weir is lower than the top of the side wall of the collection pool;

[0019] The opening of the first small water pool corresponds to the drain outlet of each device to be cooled;

[0020] The second small water pool is connected to the high-level water pool through a water pump, and its output port is arranged close to the bottom.

[0021] Furthermore, the input end of the bypass control valve, the input end of the main control valve, and the input end of the standby control valve are respectively connected to the high-level water tank through a water collection pipe;

[0022] The diameter of the water collection pipeline is larger than the diameter of the main pipeline;

[0023] The water collection pool is connected to the water collection pipe through a water pumping pipe, and the water pump is arranged on the water pumping pipe;

[0024] A stop valve is arranged on the water pumping pipeline.

[0025] Furthermore, the input end of the main control valve and the input end of the standby control valve are respectively connected to the water collection pipe through the main pipe;

[0026] The input end of the bypass control valve is connected to the water collection pipe through the bypass pipe;

[0027] The diameter of the bypass pipeline is smaller than the diameter of the main pipeline;

[0028] The bypass control valve has a smaller diameter than the main control valve and the standby control valve.

[0029] Furthermore, a pressure sensor P is provided on the main pipeline. 总 ;

[0030] Each branch pipeline is provided with a pressure sensor P 支 .

[0031] Furthermore, each branch pipeline is also provided with a flow meter.

[0032] Furthermore, the bypass control valve, the main control valve and the standby control valve are all electric valves;

[0033] The branch regulating valves are all manually adjustable butterfly valves.

[0034] A method for redundantly controlling and supplying cooling water for multiple devices based on gravity flow, using the above-mentioned redundantly controlling and supplying cooling water for multiple devices based on gravity flow, is special in that it includes the following steps:

[0035] Step 1, storing water in the collection pool, the amount of water stored is determined according to the total amount of cooling water used by each device to be cooled and the filling amount and safety margin of the above-mentioned gravity-based multi-device cooling water redundant control supply device;

[0036] Step 2: Close the bypass control valve, the main control valve and the standby control valve through the control unit, start the water pump, open the branch regulating valve, and transfer the water in the collection pool to the high-level water pool until the water in the high-level water pool reaches the target amount, and then close the water pump and the branch regulating valve;

[0037] Step 3: Open the bypass control valve through the control unit to fill the downstream pipeline with cooling water;

[0038] Step 4: After the filling is completed, the bypass control valve is closed through the control unit, each branch regulating valve is opened, the main control valve and the standby control valve are opened in sequence, and then the standby control valve is closed to cool the equipment to be cooled;

[0039] When any main control valve and its pipeline fails, the control unit opens the standby control valve for replacement;

[0040] Step 5: After cooling, each device to be cooled discharges cooling water to a collection pool, where the device naturally dissipates heat and cools down. Repeat steps 1 to 4 until each device to be cooled finishes working.

[0041] Beneficial effects of the present invention:

[0042] 1. The redundant control and supply device for cooling water for multiple devices based on gravity flow provided by the present invention is provided with a bypass control valve, a main control valve and a backup control valve connected to the control unit, forming a redundant control valve group, which can control multiple cooling water supplies, effectively avoiding the risk of single point failure in the past, and greatly improving the reliability of cooling water supply for each device and the safety of large-scale equipment operation.

[0043] 2. A bypass control valve is provided in the present invention. When working, the bypass control valve is opened first to fill the downstream pipeline. The diameter of the bypass control valve is smaller than the diameters of the main control valve and the backup main control valve, which can weaken the large blind plate force and water hammer borne by the equipment to be cooled when it is opened, thereby extending the service life of the equipment.

[0044] 3. In the present invention, an overflow weir is provided in the collecting pool, and the collecting pool is divided into a first small pool and a second small pool. Various hard wastes with higher density in the cooling water discharged from the cooled equipment will be deposited at the bottom of the first small pool. After overflowing from the overflow weir, the cooling water is transported from the second small pool to the high-level pool, thereby effectively controlling the wastes during the recycling of cooling water in the entire device.

[0045] 4. In the present invention, the water pumping pipeline uses the water collection pipeline to pump water to the high-level water tank in reverse, and the water supply / water pumping isolation is performed through the stop valve, which greatly reduces the cost of laying a separate water pumping pipeline.

[0046] 5. The present invention arranges manually adjustable butterfly valves and flow meters on the branch pipes in front of each device to be cooled. Compared with the previous mode of installing a throttling orifice plate inside the pipe, the cooling water flow can be adjusted more conveniently. The manually adjustable butterfly valve and flow meter can be used to debug and adjust the cooling water flow of the equipment to ensure that the cooling water flow of the equipment can meet the rated flow requirements. This not only improves the reliability of the cooling water supply, but also improves the operability of the entire device.

[0047] 6. The volume of the collection water tank in the present invention is greater than that of the high-level water tank, so that the entire device has a certain safety margin and improves the reliability of equipment cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a structural schematic diagram of an embodiment of a redundant control and supply device for cooling water for multiple devices based on gravity flow of the present invention;

[0049] Figure 2 It is a schematic diagram of the structure of the water collection pool and the equipment to be cooled in an embodiment of the present invention.

[0050] Figure Number:

[0051] 1-high level water tank, 2-collecting water tank, 21-overflow weir, 22-first small water tank, 23-second small water tank, 3-main pipeline, 4-bypass control valve, 5-main control valve, 6-backup control valve, 7-branch pipeline, 8-branch regulating valve, 9-water pump, 10-water collection pipeline, 11-water pumping pipeline, 12-main pipeline, 13-bypass pipeline, 14-flow meter, 15-stop valve. DETAILED DESCRIPTION

[0052] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] The redundant control and supply device for cooling water of multiple devices based on gravity flow is used to realize the reliable and accurate supply and recycling of cooling water of multiple large devices constituting the gas injection system of the test bench during the high-altitude simulation test of the attitude and orbit control rocket engine. The present invention mainly solves the problem that the independent control mode of cooling water of each device of the high-altitude simulation test bench is prone to single-point failure risk in the past, and realizes the reliable and accurate supply of cooling water for multiple devices. Taking advantage of the characteristics of the head potential energy principle, such as simple system composition, relatively mature application and high working reliability, a cooling water supply system based on gravity flow was designed. By setting up a high-level water pool, the large-flow supply demand of cooling water is realized, ensuring that the cooling water inlet pressure of each equipment to be cooled meets the requirement; using the "2 in use and 1 in reserve" redundant control idea, a cooling water supply system with redundant control electric valve group + flow regulating butterfly valve set in front of the cooling water inlet of each equipment is designed, which effectively avoids the risk of single point failure that is very easy to occur in the independent control mode of cooling water of multiple equipments, ensures the accurate distribution of cooling water flow of each equipment, and provides a method for obtaining the flow resistance characteristics of the system; the water pumping route uses the water collection pipe to pump water to the high-level water pool, and isolates the water supply / water pumping through the stop valve, realizing the recycling of cooling water and greatly reducing the cost of laying a separate water pumping pipeline.

[0054] The following is a specific structural setting of a redundant control and supply device for cooling water for multiple devices based on gravity flow provided by an embodiment of the present invention. In this embodiment, the devices to be cooled are described in detail by taking multiple devices to be cooled in a gas injection system as an example. Figure 1 As shown, it includes a high-level water tank 1, a collection water tank 2, a main pipeline 3, a control unit, a bypass control valve 4, two main control valves 5 and a standby control valve 6;

[0055] The high-level water tank 1 is set at a position higher than all the equipment to be cooled, and is used to store cooling water to meet the large flow supply demand of cooling water and ensure that the cooling water inlet pressure of each equipment to be cooled meets the requirements. The volume of the high-level water tank 1 is determined by the total water consumption of each equipment to be cooled, the filling volume of the entire device, and a moderate safety margin. The construction height of the high-level water tank 1 is determined according to the cooling water inlet pressure of each equipment to be cooled and the flow resistance characteristics of the system.

[0056] The input end of the backup control valve 6 and the input end of the main control valve 5 are connected to one end of the water collection pipe 10 through a main pipe 12, respectively. The input end of the bypass control valve 4 is connected to one end of the water collection pipe 10 through a bypass pipe 13. The other end of the water collection pipe 10 is connected to the high-level water tank 1. The output end of the bypass control valve 4, the output end of the main control valve 5, and the output end of the backup control valve 6 are connected to the main pipe 3 respectively. The diameter of the water collection pipe 10 is larger than the diameter of the main pipe 3. The diameter of the bypass pipe 13 is smaller than the diameter of the main pipe 12. The diameter of the bypass control valve 4 is smaller than the diameter of the main control valve 6 and the backup main control valve 5. The part of the water collection pipe 10 close to the main pipe 12 is installed on the ground to achieve transition buffering when the cooling water in the high-level water tank 1 is transported to the ground through the main pipe 12.

[0057] A plurality of branch pipes 7 are provided on the side wall of the main pipe 3 for connecting the cooling water inlets of the various devices to be cooled. A pressure sensor P is also provided on the main pipe 3. 总 ;; Each branch pipe 7 is provided with a branch regulating valve and a pressure sensor P in sequence along the direction close to the equipment to be cooled. 支 and flow meter 14 to measure water pressure and cooling water flow;

[0058] In this embodiment, the bypass control valve 4, the main control valve 5 and the backup control valve 6 are all electric valves; the specifications of the main control valve 5 and the backup control valve 6 are consistent, and the specifications of the bypass control valve 4 are smaller. The branch regulating valves 8 are all manually adjustable butterfly valves. Before the cooling water enters each device to be cooled, the manual adjustable butterfly valve is debugged to determine the opening of the manual adjustable butterfly valve. The subsequent manual adjustable butterfly valve will be in a normally open state and the opening remains unchanged. If the working conditions change and the equipment cooling water flow needs to be adjusted, it is necessary to re-debug and confirm the opening of the manual adjustable butterfly valve in the new state. Before re-debugging, the system flow resistance characteristics in the new state can be calculated based on the relationship that the square of the flow rate is proportional to the square of the flow resistance, which provides data reference for judging whether the parameters such as the equipment cooling water pressure and flow rate can meet the requirements or the cooling water system modification.

[0059] The control unit is connected to the bypass control valve 4, the main control valve 5 and the backup control valve 6 respectively, and is used to control the opening and closing of the bypass control valve 4, the main control valve 5 and the backup control valve 6; realizes the action timing control of each electric valve of the redundant control electric valve group, and reasonably incorporates the opening / closing trigger timing of the electric valve into the overall control program of the gas injection system.

[0060] like Figure 2 As shown, the collection pool 2 is an open pool with an upward entrance, that is, the surface of the pool is open, with a large surface area, and can use natural heat dissipation to cool down, with a certain safety margin; the collection pool 2 is set below each device to be cooled, and its volume is larger than the volume of the high-level pool 1. An overflow weir 21 is provided in the collection pool 2, dividing the collection pool 2 into a first small pool 22 and a second small pool 23; the top of the overflow weir 21 is lower than the top of the side wall of the collection pool 2; the opening of the first small pool 22 corresponds to the drain outlet of each device to be cooled; the second small pool 23 is connected to the high-level pool 1 through a water pumping pipe 11, and its output port is close to the bottom. A water pump 9 and a stop valve 15 are provided on the water pumping pipe 11; various hard wastes with high density in the cooling water discharged by the equipment will be deposited at the bottom of the first small pool 22, and the cooling water without hard wastes will overflow to the second small pool 23 through the overflow weir, and then pump water to the high-level pool 1, which effectively improves the control level of wastes during the recycling of cooling water in the entire device.

[0061] The redundant control and supply device for cooling water for multiple devices based on gravity flow is used to control and supply cooling water for multiple devices, which specifically includes the following steps:

[0062] Step 1, storing water in the collection pool 2, the amount of water stored is determined according to the total amount of cooling water used by each device to be cooled and the filling amount and safety margin of the above-mentioned gravity-based multi-device cooling water redundant control supply device;

[0063] Step 2: close the bypass control valve 4, the main control valve 5 and the standby control valve 6 through the control unit, start the water pump 9, open the stop valve 15, and transfer the water in the collection pool 2 to the high-level water pool 1 until the water in the high-level water pool 1 reaches the target amount, and then close the water pump 9 and the stop valve 15;

[0064] Step 3, opening the bypass control valve 4 through the control unit to fill the downstream pipeline with cooling water, so as to weaken the large blind plate force and water hammer borne by the equipment to be cooled when opening;

[0065] Step 4: After filling, start the gas injection system, and then all the equipment to be cooled will be started and cooled. The bypass control valve 4 will be closed by the control unit, and each branch regulating valve 8 will be opened. The main control valve 5 and the backup control valve 6 will be opened in turn, and then the backup control valve 6 will be closed to cool the equipment to be cooled. The backup control valve 6 can replace the main control valve 5 and the corresponding pipeline when one of the main control valve 5 and the main pipeline 12 fails. In this way, it can be ensured that opening any two main routes can meet the supply of cooling water flow for multiple devices, and the other main route can be used as a redundant backup. It avoids the risk of single point failure that is very easy to occur in the independent control mode of cooling water of each device in the previous high-altitude simulation test bench, and greatly improves the reliability of cooling water supply for each device and the safety of large-scale equipment operation.

[0066] When any main control valve 5 and its pipeline fails, the control unit opens the standby control valve 6 for replacement;

[0067] Step 5: After cooling, each device to be cooled discharges cooling water to the collection pool 2, where the cooling water is naturally dissipated and cooled. Steps 1 to 5 are repeated until each device to be cooled finishes working, thereby pumping the cooling water from the collection pool 2 to the high-level water pool 1 through the water collection pipe 10, thereby realizing the recycling of cooling water, and closing the stop valve 15 to isolate the water pumping / water supply path. Using the water collection pipe 10 to pump water greatly reduces the cost of laying a separate water pumping pipeline.

[0068] When used for the first time, the water is first collected in the water pool 2 and then water is pumped through the pumping pipe 11 to store water in the high-level water pool 1.

[0069] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A redundant control and supply device for cooling water for multiple devices based on gravity flow, characterized in that: It comprises a high-level water tank (1), a collection water tank (2), a main pipeline (3), a control unit, a bypass control valve (4), at least one main line control valve (5) and at least one standby control valve (6); The high-level water tank (1) is arranged at a position higher than all the equipment to be cooled and is used to store cooling water; The input end of the bypass control valve (4), the input end of the main control valve (5), and the input end of the standby control valve (6) are respectively connected to the high-level water tank (1); the output end of the bypass control valve (4), the output end of the main control valve (5), and the output end of the standby control valve (6) are respectively connected to the main pipeline (3); A plurality of branch pipes (7) are provided on the side wall of the main pipe (3) for respectively connecting to the cooling water inlet of each device to be cooled; each branch pipe (7) is respectively provided with a branch regulating valve (8); The control unit is connected to the bypass control valve (4), the main control valve (5) and the standby control valve (6) respectively, and is used to control the opening and closing of the bypass control valve (4), the main control valve (5) and the standby control valve (6); The inlet of the collection water pool (2) is connected to the drain outlet of each device to be cooled, and the outlet is connected to the high-level water pool (1) through a water pump (9).

2. The redundant control and supply device for cooling water for multiple devices based on gravity flow according to claim 1 is characterized in that: The collection pool (2) is an open pool with an inlet facing upward; The collection water pool (2) is arranged below each device to be cooled, and its opening corresponds to the drainage outlet of each device to be cooled.

3. The redundant control and supply device for cooling water for multiple devices based on gravity flow according to claim 2 is characterized in that: The volume of the collection water tank (2) is greater than the volume of the high-level water tank (1).

4. The redundant control and supply device for cooling water for multiple devices based on gravity flow according to claim 3 is characterized in that: An overflow weir (21) is provided in the collection pool (2) to divide the collection pool (2) into a first small pool (22) and a second small pool (23); The top of the overflow weir (21) is lower than the top of the side wall of the collection pool (2); The opening of the first small water pool (22) corresponds to the drain outlet of each device to be cooled; The second small water pool (23) is connected to the high-level water pool (1) via a water pump (9), and its output port is arranged close to the bottom.

5. The redundant control and supply device for cooling water for multiple devices based on gravity flow according to any one of claims 1 to 4, characterized in that: The input end of the bypass control valve (4), the input end of the main control valve (5), and the input end of the standby control valve (6) are respectively connected to the high-level water tank (1) through a water collection pipe (10); The diameter of the water collection pipeline (10) is greater than the diameter of the main pipeline (3); The water collection pool (2) is connected to the water collection pipe (10) via a water pumping pipe (11), and the water pump (9) is arranged on the water pumping pipe (11); The water pumping pipeline (11) is provided with a stop valve (15).

6. The redundant control and supply device for cooling water for multiple devices based on gravity flow according to claim 5, characterized in that: The input end of the main control valve (5) and the input end of the standby control valve (6) are respectively connected to the water collection pipeline (10) through the main pipeline (12); The input end of the bypass control valve (4) is connected to the water collection pipe (10) through a bypass pipe (13); The diameter of the bypass pipeline (13) is smaller than the diameter of the main pipeline (12); The bypass control valve (4) has a smaller diameter than the main control valve (5) and the standby control valve (6).

7. The redundant control and supply device for cooling water for multiple devices based on gravity flow according to claim 6, characterized in that: The main pipeline (3) is provided with a pressure sensor P 总 ; Each branch pipeline (7) is provided with a pressure sensor P 支 .

8. The redundant control and supply device for cooling water for multiple devices based on gravity flow according to claim 7, characterized in that: Each branch pipeline (7) is also provided with a flow meter (14).

9. The redundant control and supply device for cooling water for multiple devices based on gravity flow according to claim 8, characterized in that: The bypass control valve (4), the main control valve (5) and the standby control valve (6) are all electric valves; The branch regulating valves (8) are all manually adjustable butterfly valves.

10. A method for redundant control and supply of cooling water for multiple devices based on gravity flow, using the redundant control and supply device for cooling water for multiple devices based on gravity flow as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1, storing water in the collection pool (2), wherein the amount of water stored is determined according to the total amount of cooling water consumed by each device to be cooled and the filling amount and safety margin of the redundant control supply device for cooling water for multiple devices based on gravity flow as described in any one of claims 1 to 9; Step 2: The bypass control valve (4), the main control valve (5) and the standby control valve (6) are closed by the control unit, the water pump (9) is started, the branch regulating valve (8) is opened, and the water in the collection pool (2) is transported to the high-level water pool (1) until the water in the high-level water pool (1) reaches the target amount, and the water pump (9) and the branch regulating valve (8) are closed; Step 3, opening the bypass control valve (4) through the control unit to fill the downstream pipeline with cooling water; Step 4: After the filling is completed, the control unit closes the bypass control valve (4), opens each branch regulating valve (8), opens the main control valve (5) and the standby control valve (6) in sequence, and then closes the standby control valve (6) to cool the equipment to be cooled; When any main control valve (5) and the pipeline to which it is connected fail, the control unit opens the standby control valve (6) for replacement; Step 5: After cooling, each device to be cooled discharges cooling water to the collection pool (2), where the cooling water is naturally dissipated and the temperature is lowered. Steps 1 to 5 are repeated until each device to be cooled finishes working.

Images