Precise cooling system for stacking and chopping of hot-rolled coil matched warehouse steel coils

Abstract

An accurate cooling system for hot-rolled coil matched warehouse steel coil stacking and chopping comprises a steel coil temperature measuring device, an industrial personal computer, a draught fan, an electric cabinet and a spraying system, an infrared thermal imager monitors total radiation infrared thermogram information and high-temperature alarm information of warehouse area steel coil stacking and chopping in real time, and the information is transmitted to the industrial personal computer through a router; the fans are distributed between two rows of steel coil stacks on the edge of the reservoir area and supply air to channels between the adjacent steel coil stacks; the electric control box controls the starting and stopping actions of corresponding equipment and adjusts the power of a motor of the spraying pump station, and the spraying system controls the work of a spraying head; a PLC module is arranged in the electric control box and used for storing a steel coil accurate cooling control algorithm, and parameters such as on-off instructions of the draught fan, the electromagnetic valve, the water supplementing pipe and the pneumatic valve are obtained through calculation. The device has the advantages that the structure is simple, the building difficulty is low, the hot rolled steel coil pile can be accurately and uniformly cooled, the hydroelectric energy loss is greatly reduced, the cooling time is greatly shortened, the production rhythm is improved, and smooth production is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of steel rolling industry, in particular to a precise cooling system for steel coil piles in a hot-rolled coil matching warehouse. Background Art

[0002] Hot-rolled steel coils are usually delivered directly to the hot-rolled supporting warehouse (also known as the cold-rolled raw material warehouse) by car or transportation. In order to prevent the high-temperature strip steel from damaging the equipment, the steel coils need to be cooled to 60-80°C after storage before pickling or pickling rolling process production. Under normal circumstances, after the hot-rolled steel coils are rolled off the hot-rolled production line, it usually takes 4-5 days for the hot-rolled steel coils of southern steel mills to cool to below 80°C under natural cooling conditions in summer. In particular, most of the steel mills in the country are currently relocating to the coastal areas. The climate in the southern coastal areas is mild and warm, making it more difficult to cool the steel coils.

[0003] At present, some enterprises have adopted the method of cooling with water cooling tanks. For example, Chinese patent CN102921748 discloses a water cooling device and a cooling method for hot-rolled stainless steel coils. The water cooling device includes a water cooling pool and a coil transfer and lifting mechanism; the water cooling pool includes a plurality of cooling tanks arranged in parallel, an oxide scale precipitation tank is arranged horizontally at one end adjacent to the plurality of cooling tanks arranged in parallel, and a drainage tank is arranged on one side of the oxide scale precipitation tank; an industrial circulating water inlet is arranged above each cooling tank, and the plurality of inlets are connected to the industrial circulating water delivery pipeline, and an inlet valve is arranged on each inlet; the hot-rolled stainless steel coils are transferred to the water cooling pool by the coil transfer and lifting mechanism. However, this water cooling scheme of the coil water tank with the transfer and lifting mechanism is not very suitable for existing steel mills, because the renovation and construction of a large water tank in the existing coil storage warehouse for cooling the coils has the difficulties and shortcomings of limited site renovation space, large investment, high cost, and long cycle. In addition, the above scheme transfers the hot coil to the water pool, and then transfers it to the outside of the water pool for air cooling after cooling. After the temperature drops to about 60°C, it is transferred to the post-cold rolling process production line. Undoubtedly, two transfer actions are added to each coil of steel, which does not conform to the current line management concept and increases the cost of additional processes. Finally, the above method is suitable for stainless steel hot coils, but not very suitable for carbon steel coils. Specifically, the production capacity of carbon steel cold rolling production lines is basically 3 to 5 times that of stainless steel cold rolling production lines. If the above technical scheme is adopted, the water pool capacity and the number of steel coil reversals must be increased accordingly, and the investment cost and use cost are higher.

[0004] At present, most domestic steel mills achieve steel coil cooling by expanding the storage capacity of hot-rolled steel coils and setting up water mist fans on the edge of the steel coil pile for long-term spraying. This method has the disadvantages of high investment cost for plant construction, uneven cooling of steel coil piles, low efficiency, and waste of water and electricity. In addition, the large amount of hot-rolled steel coils in the hot-rolled steel coil warehouse occupies a large amount of working capital, which does not meet the requirements of lean production of modern enterprises.

[0005] Therefore, how to quickly and cost-effectively build a hot-rolled steel coil cooling system, how to accurately and efficiently implement steel coil cooling and reduce water and electricity consumption and the cost of repeated transportation of steel coils are industry pain points that need to be urgently addressed in cold rolling production lines, and have great research and development value. Utility Model Content

[0006] The utility model aims to provide a solution that overcomes the shortcomings of existing water pool cooling solutions, which require large construction investment and high operating costs, and also overcomes the shortcomings of existing water mist fan solutions, such as uneven cooling of steel coil piles, low efficiency, and waste of water and electricity resources caused by fool-style spraying. A precise cooling system solution for steel coil piles in a hot-rolled coil supporting warehouse is proposed, in which controllable nozzles and fans are arranged between the steel coil piles, giving the ability to monitor the temperature information of the steel coil piles in real time, and using an internal control algorithm to implement precise spraying and blowing on steel coil piles at different temperatures, thereby achieving precise cooling of the steel coil piles, and a fast, efficient, and energy-saving and cost-reducing precise cooling system for steel coil piles in a hot-rolled coil supporting warehouse.

[0007] The technical solution disclosed in the utility model is:

[0008] A precise cooling system for steel coil piles in a hot-rolled coil supporting warehouse, comprising a steel coil temperature measuring device, an industrial computer, a fan, an electric control box and a spray system, characterized in that: the steel coil temperature measuring device comprises an infrared thermal imager, a router and a display screen, the infrared thermal imager monitors the full-radiation infrared thermal image information and high-temperature alarm information of the steel coil piles in the warehouse area in real time, and the information is transmitted to the industrial computer through the router; the fan is distributed between two rows of steel coil piles at the edge of the warehouse area, and supplies air to the channels between adjacent steel coil piles; the electric control box is connected to the industrial control box, and has a built-in steel coil precise cooling control algorithm to obtain switch instructions for the fan, solenoid valve, water supply pipe and pneumatic valve, The power factor of the variable frequency motor of the spray pump station is adjusted to control the opening and closing of the corresponding equipment and adjust the power of the motor of the spray pump station, so as to finally realize that the steel coil piles in different partitions can be accurately sprayed and blown as the temperature changes; the spray system includes a spray pump station, a solenoid valve, and a nozzle, wherein the nozzles are distributed on both sides of the steel coil pile to determine the direction of the water sprayed by the nozzles to the steel coils. The spray pump station is connected to the electric control box, which controls the action, and the solenoid valve is used to control the opening and closing of the nozzle; the industrial computer is connected to the display screen and the electric control box, and the infrared thermal map information is displayed on the display screen, and the high temperature alarm information is transmitted to the electric control box, providing a decision basis for the precise cooling control algorithm of the steel coil.

[0009] As a preferred solution, multiple infrared thermal imagers are used, and their number is determined by the temperature measurement coverage range of a single infrared thermal imager and the target temperature measurement site, and the horizontal and vertical temperature measurement range overlap is 20-30%; the temperature measurement coverage capability of a single infrared thermal imager is determined by the installation height, temperature measurement distance and rotation range of the lens.

[0010] As a preferred solution, the infrared thermal imager uses a cruise scanning mode to automatically cycle and measure the temperature between multiple preset points in the area. When the temperature of the steel coil at the preset point is greater than 80°C, high temperature information is generated and transmitted to the industrial computer through a router.

[0011] As a preferred solution, the preset points are set according to the arrangement spacing of the steel coils, and one steel coil saddle is set as one preset point.

[0012] As a preferred solution, the electrical control box has a built-in PLC module for storing the precise cooling control algorithm for steel coils, calculating the switching instructions of the fan, solenoid valve, water supply pipe and pneumatic valve, and the power factor of the spray pump station variable frequency motor, so as to control the opening and closing actions of the corresponding equipment and adjust the power of the spray pump station motor, ultimately achieving precise spraying and blowing of steel coil piles in different partitions as the temperature changes.

[0013] As a preferred solution, the spray system also includes a water pool, a spray pump station, a water inlet pipeline, a solenoid valve, a nozzle and a return water network, wherein the water pool includes an inlet pool and a return water pool, which are respectively used to store purified water for spraying and circulating return water after spray cooling. A filter plate is arranged between the two water pools to filter impurities in the circulating return water. The inlet pool is equipped with an electronic liquid level meter, an electronic thermometer, a water supply pipe and a pneumatic valve.

[0014] As a preferred solution, the router uses optical fiber or 5G wireless network to send and receive information. It continuously receives full-radiation infrared thermal map information and high-temperature alarm information of the steel coil piles in the warehouse area, and transmits the information to the industrial computer.

[0015] As a preferred solution, the fan and the spray system work in a cyclical procedure of spraying first and then air cooling, and the electric control box controls the opening and closing of the corresponding solenoid valve according to the high temperature alarm information and the spray timer.

[0016] As a preferred solution, whether the fan is shut down needs to be determined by a comprehensive "NAND gate" based on the fan start and stop information given by other nozzle points in the column. The determination principle is: one-to-many relationship, and the fan will only stop when all are stopped.

[0017] As a preferred solution, the electronic liquid level gauge and electronic thermometer of the water inlet pool in the spray system continuously refresh the current liquid level and temperature information, and feed it back to the PLC module of the electric control box, and its built-in automatic water replenishment algorithm starts to execute. If the liquid level of the water pool is lower than the maximum design water level by 200mm, the water replenishment pipe and pneumatic valve are opened to replenish water; if the temperature of the water inlet pool is higher than 70°C, the water replenishment pipe and pneumatic valve are opened to replenish water and cool down.

[0018] The beneficial effects of the utility model are: simple structure, low difficulty in construction, and the ability to achieve precise and uniform cooling of hot-rolled steel coils, which greatly reduces the loss of water and electricity energy while also greatly shortening the cooling time, improving the production rhythm, and ensuring smooth production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the system structure of the utility model.

[0020] Figure 2 yes Figure 1 AA cross-section diagram.

[0021] Figure 3 It is the automatic control framework model of the utility model.

[0022] Figure 4 It is a schematic diagram of the division of the cruise reservoir area and the arrangement of the nozzles of the infrared thermal imager of the utility model.

[0023] Detailed description of the accompanying drawings: router 1, electric control box 2, fan 3, infrared thermal imager 4, steel coil pile 5, industrial computer 6, water inlet pipeline 7, spray pump station 8, water outlet pipeline 9, water inlet pool 10, filter plate 11, return water pool 12, return water ditch 13, solenoid valve 14, nozzle 15, display screen 16, water supply pipe and pneumatic valve 17, electronic liquid level meter 18, electronic thermometer 19. DETAILED DESCRIPTION

[0024] The present invention is further described and illustrated below in conjunction with specific embodiments and accompanying drawings:

[0025] Please refer to Figure 1The utility model proposes a precise cooling system for steel coils in a hot-rolled coil supporting warehouse, which includes a steel coil temperature measuring device, an industrial computer, a fan, an electric control box and a spray system. The steel coil temperature measuring device includes an infrared thermal imager 4, a router 1 and a display screen 16; the spray system includes a pool, a spray pump station 8, a water inlet pipeline 7, a water outlet pipeline 9, a solenoid valve 14, a nozzle 15, a water supply pipe and a pneumatic valve 17 and a return water ditch 13. The router 1 is respectively connected to the infrared thermal imager 4 and the industrial computer 6; the spray pump station 8, the fan 3, the solenoid valve 14, the water supply pipe and the pneumatic valve 17, the electronic liquid level meter 18 and the electronic thermometer 19 are respectively connected to the electric control box 2, and the industrial computer 6 is connected to the display screen 16 and the electric control box 2. The infrared thermal imager 4 monitors the full-radiation infrared thermal image information and high-temperature alarm information of the steel coil piles in the warehouse area in real time, and the information is transmitted to the industrial computer 6 through the router 1; the industrial computer 6 then displays the infrared thermal image information on the display screen 16, and transmits the high-temperature alarm information to the electric control box 2; the electric control box 2 has a built-in steel coil precise cooling control algorithm, obtains the switch instructions of the fan 3, the solenoid valve 14, the water supply pipe and the pneumatic valve 17, and the power factor of the spray pump station variable frequency motor, thereby controlling the opening and closing actions of the corresponding equipment and adjusting the power of the spray pump station motor, and finally realizing that the steel coil piles in different partitions can be accurately sprayed and blown as the temperature changes, so as to achieve the purpose of rapid, efficient and precise cooling and energy saving and emission reduction.

[0026] Characteristics and functions of each component of the system:

[0027] (1) The infrared thermal imager 4 is used to monitor the full-radiation infrared thermal image information and high-temperature alarm information of the steel coil pile in the warehouse in real time. This information is transmitted to the industrial computer 6 through the router 1; the industrial computer 6 then displays the infrared thermal image information on the display screen 16 and transmits the high-temperature alarm information to the electric control box 2, providing a decision-making basis for the precise cooling control algorithm of the steel coil. Please refer to Figure 1 , Figure 2In this embodiment, the total number of infrared thermal imagers 4 is determined by the temperature measurement coverage of a single infrared thermal imager and the target temperature measurement site. Generally, the horizontal and vertical temperature measurement range overlap is required to be 20-30%. The temperature measurement coverage capability of a single infrared thermal imager is determined by the installation height, temperature measurement distance, and the rotation range of the lens. In this embodiment, the infrared thermal imager 4 is preferably a thermal imaging dual-spectrum intelligent ball camera, the lens can rotate 360°, the infrared temperature measurement distance is 27.5m, the installation height is 10m, the steel coil stack is 39m long and 38m wide, with a total area of ​​approximately 1482㎡, and a column span of 45m. Three infrared thermal imagers are installed on both sides of the factory column, marked as S1-S6 respectively, and the distance between the two infrared thermal imagers on a single side is 20m, so as to achieve full coverage temperature measurement of the steel coil stacking area. The thermal imaging dual-spectrum intelligent ball camera is selected, which adopts the field of view of the synchronous visible light channel and the thermal imaging channel, and is configured with preset points for automatic cruise area temperature measurement. The infrared temperature measurement distance is 27.5m, the temperature measurement range is -0-550℃, the resolution is 640×480, the pixel size is 17um, the focal length is 20mm, and the field of view is 30°×23°. The horizontal rotation range of the pan / tilt is 0°-360°, and the horizontal rotation speed is 0.26° / s-54.5° / s; the vertical rotation range is -30°-90°, and the vertical rotation speed is 0.26° / s-62.2° / s.

[0028] Please refer to Figure 4 , 6 infrared thermal imagers divide the steel coil stack in the warehouse into 6 areas, which are recorded as Area A, Area B, Area C, Area D, Area E and Area F. The infrared thermal imager uses the cruise scanning mode to automatically cycle and measure the temperature between multiple preset points in the area. When the temperature of the steel coil at the preset point is greater than 80℃, high temperature information is generated and transmitted to the industrial computer through the router. In this example, the preset points are set according to the spacing of the steel coils, and one steel coil saddle is set as a preset point.

[0029] (2) Router 1 uses optical fiber or 5G wireless network to send and receive information. It continuously receives full-radiation infrared thermal image information and high-temperature alarm information of the steel coil pile in the warehouse area, and transmits the information to the industrial computer.

[0030] (3) The industrial computer 6 receives the full-radiation infrared thermal image information and high-temperature alarm information of the steel coil pile in the warehouse through the router 1, then displays the infrared thermal image information on the display screen, and transmits the high-temperature alarm information to the electric control box, providing a decision basis for the precise cooling control algorithm of the steel coil.

[0031] (4) The electric control box 2 has a built-in PLC module for storing the precise cooling control algorithm for the steel coils, calculating the switch instructions of the fan, solenoid valve, water supply pipe and pneumatic valve, and the power factor of the variable frequency motor of the spray pump station, so as to control the opening and closing actions of the corresponding equipment and adjust the power of the spray pump station motor, and finally realize that the steel coils in different partitions can be precisely sprayed and blown as the temperature changes.

[0032] (5) The blower 3 is used to accelerate the air circulation in the storage area and enhance the atomization effect of the spray water column, thereby increasing the cooling speed of the steel coils. The blowers are installed between two rows of stacked steel coils at the edge of the storage area, with a total of 15 rows and 30 units, respectively denoted as J1 - J30.

[0033] (6) Spraying system: Please refer to Figure 1 、 Figure 2 , the system includes a water tank, a spray pump station 8, a water inlet pipeline 7, a solenoid valve 14, spray nozzles 15 and a return water pipe network. The water tank includes a water inlet tank 10 and a return water tank 12, which are respectively used to store the purified water for spraying and the circulating return water after spray cooling. A filter plate 11 is arranged between the two water tanks to filter the impurities in the circulating return water. The water inlet tank is equipped with an electronic liquid level gauge 18, an electronic thermometer 19, and a water supply pipe with a water supply pipe and a pneumatic valve 17. When the liquid level is 200 mm lower than the highest designed water level of the water tank or the water temperature exceeds 70 °C, the valve on the water supply pipe opens for water supply and temperature reduction.

[0034] The spray pump station preferably uses a high-power centrifugal pump with a variable-frequency motor. The power of the variable-frequency motor is adjusted proportionally according to the number of spray nozzles opened in the spraying system, which has the effects of rapid response, energy conservation and consumption reduction.

[0035] Please refer to Figure 1 , the spray nozzles are installed behind the solenoid valves and are equally spaced between two rows of stacked steel coils. One row of spray nozzles is also arranged on each side of the stack edge for spraying outside the edge of the steel coil stack. They are marked according to the scanning area marked by the infrared thermal imager and the number of spray nozzles. For example, the spray nozzles in area A are respectively denoted as A1 - A15. Each spray nozzle serves as a temperature measurement and alarm preset point for the thermal imaging camera. In this embodiment, the maximum diameter of the steel coil is 2.1 m, the width is 1.78 m, and it is stacked in two layers. The top of the steel coil is 3.9 m from the ground, and the column spacing of the steel coils is 2.7 m. Preferably, a high-pressure nozzle of a DN50 sprinkler truck is installed at an elevation angle of 32°, with a layout spacing of 8 m, and the spraying directions of the first and last spray nozzles are opposite. It is adjusted to a water mist state, sprayed in a conical shape, with a spraying distance of 9.5 m, a spraying range of 12 m, a flow rate of 50 L / min, and a pressure of 7 bar.

[0036] The solenoid valve 14 is installed at the inlet of the spray nozzle and is in a normally closed state. When the electric control cabinet receives an instruction, it powers on the solenoid valve and the valve core opens. It is a key device for automatic and precise spray cooling. Preferably, a DN50 direct-acting water solenoid valve is used.

[0037] The return water pipe network is a ditch, in a loop shape between the stacked steel coils, used to collect the cooling wastewater into the return water tank of the water tank for recycling. In this embodiment, a shallow trench cover ditch is preferably used.

[0038] System working mode and control method:

[0039] (1) System components are powered on and initialized: the spray pump station starts at low power, the fan is in the shutdown state, the solenoid valve 14, the water supply pipe and the pneumatic valve 17 are in the closed state, and the six infrared thermal imagers 4 start to automatically scan the warehouse area according to the set cruise route. The full radiation infrared thermal image information of the steel coil pile is sent to the industrial computer through the router and displayed in real time on the display screen. When the preset point steel coil temperature is greater than 80℃, the thermal imaging ball camera generates a high temperature alarm message and sends it to the industrial computer through the router. The industrial computer 6 then transmits the high temperature alarm message to the electric control box to provide input conditions for the steel coil precise cooling control algorithm.

[0040] (2) Since the steel coil is large, after the spray system is started, the core temperature of the steel coil will be high and the surface temperature will be low. If spraying is continued at this time, the cooling effect will be poor. Therefore, the air cooling system needs to be started after spraying, and water spraying should continue after the core temperature is slowly transferred to the surface of the steel coil. In order to improve energy utilization, spraying is stopped after 20-30 minutes, and the fan in the same column as the nozzle is started for air cooling. The fan stops after 10-15 minutes, and the cycle is repeated. The steel coil precise cooling control algorithm of the PLC module of the electric control box controls the opening and closing of the corresponding solenoid valve according to the high temperature alarm information and the spray timer. For example, when the A1 preset point alarms for high temperature, the A1 spray timer 1 is powered on and the A1 solenoid valve is opened; 20 minutes later, the A1 spray timer 1 is reset, the A1 spray timer 2 is powered on and the A1 solenoid valve is closed, and the J1 and J16 fans in the corresponding column of A1 are started; after another 10 minutes, the A1 spray timer 2 is reset, and the A1 point sends a shutdown message to the J1 and J16 fans. At this time, whether the fan is shut down needs to be determined by a comprehensive "NAND gate" based on the fan start and stop information given by other nozzle points in the column (A6, A11, D1, D6 and D11) (one-to-many relationship, it will stop only when all are stopped).

[0041] The ratio of the number of nozzles being sprayed to the total number of nozzles is used as the power adjustment factor of the variable frequency motor of the spray pump station, and the output power of the spray pump station is obtained through interpolation, so as to adjust the power output of the spray pump station in real time to meet the spray pressure and flow requirements. The PLC module adjusts the motor power of the spray pump station through the motor inverter to achieve accurate and efficient energy-saving and cooling control.

[0042] (3) The spray pump draws water from the water inlet pool for spraying. The water after spraying and cooling returns to the return water pool through the return water ditch to settle. When the water level reaches the filter height, the water enters the water pool after being filtered by the filter for recycling. The electronic level gauge and electronic thermometer of the water inlet pool continuously refresh the current liquid level and temperature information, and feed it back to the PLC module of the electric control box. Its built-in automatic water replenishment algorithm starts to execute. If the liquid level of the water pool is 200mm lower than the maximum design water level, the water replenishment pipe and pneumatic valve are opened to replenish water; if the temperature of the water inlet pool is higher than 70℃, the water replenishment pipe and pneumatic valve are opened to replenish water and cool down.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. The hot rolled coil warehouse steel coil pile precise cooling system includes a steel coil temperature measuring device, an industrial computer, a fan, an electric control box and a spray system, which is characterized by: The steel coil temperature measuring device includes an infrared thermal imager, a router and a display screen. The infrared thermal imager monitors the full-radiation infrared thermal map information and high-temperature alarm information of the steel coil piles in the storage area in real time, and the information is transmitted to the industrial control computer through the router; the fan is distributed between two rows of steel coil piles at the edge of the storage area, and supplies air to the channel between adjacent steel coil piles; the electric control box is connected to the industrial control box; the spray system includes a spray pump station, a solenoid valve, and a nozzle, wherein the nozzles are distributed on both sides of the steel coil pile to determine that the water sprayed by the nozzle is sprayed towards the steel coil, the spray pump station is connected to the electric control box, and the action is controlled by the electric control box, and the solenoid valve is used to control the opening and closing of the nozzle; the industrial control computer is connected to the display screen and the electric control box, displays the infrared thermal map information on the display screen, and transmits the high-temperature alarm information to the electric control box.

2. The hot rolled coil supporting warehouse steel coil stack precise cooling system according to claim 1, characterized in that: The infrared thermal imagers are used in plurality, and their number is determined by the temperature measurement coverage range of a single infrared thermal imager and the target temperature measurement site, and the horizontal and vertical temperature measurement range overlap is 20-30%; the temperature measurement coverage capability of a single infrared thermal imager is determined by the installation height, temperature measurement distance and the rotation range of the lens.

3. The hot rolled coil supporting warehouse steel coil stack precise cooling system according to claim 2, characterized in that: The infrared thermal imager adopts a cruise scanning mode to automatically cycle and measure the temperature between multiple preset points in the area. When the temperature of the steel coil at the preset point is greater than 80°C, high temperature information is generated and transmitted to the industrial computer through a router.

4. The hot rolled coil supporting warehouse steel coil stack precise cooling system according to claim 3, characterized in that: The preset points are set according to the arrangement spacing of the steel coils, and one steel coil saddle is set as one preset point.

5. The hot rolled coil supporting warehouse steel coil stack precise cooling system according to claim 1, characterized in that: The electric control box has a built-in PLC module.

6. The hot rolled coil supporting warehouse steel coil stack precise cooling system according to claim 1, characterized in that: The spray system also includes a water pool, a spray pump station, a water inlet pipeline, a solenoid valve, a nozzle and a return water network, wherein the water pool includes an inlet pool and a return water pool, which are respectively used to store purified water for spraying and circulating return water after spray cooling. A filter plate is arranged between the two water pools to filter impurities in the circulating return water. The inlet pool is equipped with an electronic liquid level meter, an electronic thermometer, a water supply pipe and a pneumatic valve.

7. The hot rolled coil supporting warehouse steel coil stack precise cooling system according to claim 1, characterized in that: The router uses optical fiber or 5G wireless network to send and receive information. It continuously receives full-radiation infrared thermal map information and high-temperature alarm information of the steel coil piles in the warehouse area, and transmits the information to the industrial computer.

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