A steel coil cooling device and control method
By combining an airflow system and a heat exchange cooling system, active and efficient cooling of steel coils is achieved, solving the problems of slow and uneven natural cooling and improving production efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHONGQING WANGBIAN ELECTRIC GRP CORP
- Filing Date
- 2026-04-20
- Publication Date
- 2026-06-02
Smart Images
Figure CN122128506A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of steel coil production technology, and more specifically, to a steel coil cooling device and control method. Background Technology
[0002] During the production process, steel coils typically require annealing. Currently, after annealing and removal from the annealing furnace, the steel coils are usually still at a high temperature and need to be allowed to cool naturally. However, this natural cooling method is very slow, and the long cooling time extends the entire production cycle, reduces production efficiency, and may cause the steel coils to remain at high temperatures for too long. Especially under the influence of ambient temperatures in summer and winter, this can lead to inconsistent cooling rates, ultimately affecting the final quality of the product.
[0003] To address the aforementioned issues, existing technologies urgently need improvement. Summary of the Invention
[0004] The purpose of this application is to provide a steel coil cooling device and control method, which aims to improve the cooling speed and cooling uniformity of steel coils.
[0005] In a first aspect, this application provides a steel coil cooling device, including a base, an outer cover, an airflow system, and a heat exchange cooling system. The base is used to support the steel coil, and the outer cover is disposed on the base and forms an inner cavity with the base to accommodate the steel coil. The airflow system includes a bottom fan unit mounted on the base and a top fan unit mounted on the top of the outer cover. The airflow system is used to drive gas to flow in the inner cavity to accelerate the cooling of the steel coil. The heat exchange and cooling system includes a plurality of liquid-cooled heat exchange units arranged around the steel coil, the liquid-cooled heat exchange units being used to cool the steel coil; the cooling power of each liquid-cooled heat exchange unit can be adjusted individually, and the distance between at least some of the liquid-cooled heat exchange units and the steel coil can be adjusted individually.
[0006] Secondly, this application provides a control method for controlling the steel coil cooling device described above to cool the steel coil, comprising the steps of: A1. Obtain the temperature and structural dimension information of the steel coil; A2. Determine the current cooling stage based on the temperature information and the structural dimension information; the cooling stage includes an early stage and a late stage; A3. Determine the cooling mode based on the current cooling stage; the cooling mode includes a hybrid cooling mode corresponding to the early stage and a liquid cooling mode corresponding to the later stage; in the hybrid cooling mode, the airflow system and the heat exchange cooling system are used for cooling simultaneously, and in the liquid cooling mode, only the heat exchange cooling system is used for cooling. A4. Based on the temperature information and the determined cooling mode, adjust the power of the airflow system and the position and cooling power of each liquid-cooled heat exchange unit in the heat exchange cooling system.
[0007] Beneficial Effects: The steel coil cooling device and control method provided in this application, combining an airflow system and a heat exchange cooling system, effectively solves the problems of slow natural cooling speed and low production efficiency of steel coils in the prior art. Specifically, the bottom and top fan units in the airflow system drive the gas flow in the inner cavity, thereby accelerating the convective cooling of the steel coil. Simultaneously, multiple liquid-cooled heat exchange units in the heat exchange cooling system are arranged around the steel coil, enabling direct liquid-cooled heat exchange. Furthermore, the cooling power of each liquid-cooled heat exchange unit can be individually adjusted, and the distance between at least some of the liquid-cooled heat exchange units and the steel coil can also be individually adjusted. This design allows the cooling process to not only proceed actively but also to be precisely and regionally controlled according to the temperature conditions at different locations on the steel coil, avoiding the inefficiency and unevenness of traditional natural cooling methods. By combining airflow and liquid cooling, the steel coil cooling device of this application can significantly shorten the cooling time of steel coils, improve production efficiency, and ensure the temperature uniformity of steel coils during the cooling process, thereby guaranteeing the final product quality of steel coils and overcoming the shortcomings of low cooling efficiency and difficulty in guaranteeing product quality in the prior art. Attached Figure Description
[0008] Figure 1 This is a structural schematic diagram of a steel coil cooling device provided in this application.
[0009] Figure 2 This is a layout diagram of the top heat exchange unit.
[0010] Figure 3 This is a layout diagram of the bottom heat exchange unit.
[0011] Figure 4 This is a layout diagram of the inner and outer circumferential heat exchange units.
[0012] Figure 5 A flowchart of the control method provided in this application.
[0013] Labeling Explanation: 1. Base; 2. Outer Cover; 201. Central Tube; 4. Inner Cavity; 5. Airflow System; 501. First Fan; 502. Second Fan; 503. Third Fan; 504. Fourth Fan; 6. Heat Exchange and Cooling System; 601. Bottom Heat Exchange Unit; 602. Top Heat Exchange Unit; 603. Inner Circumferential Heat Exchange Unit; 604. Outer Circumferential Heat Exchange Unit; 605. Telescopic Device. Detailed Implementation
[0014] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0015] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0016] Please refer to Figures 1-4 A steel coil cooling device according to some embodiments of this application includes a base 1, an outer cover 2, an airflow system 5, and a heat exchange cooling system 6. The base 1 is used to support the steel coil (e.g., ...). Figure 1 (a) The outer cover 2 is placed on the base 1 and forms an inner cavity 4 with the base 1 to accommodate the steel coil; The airflow system 5 includes a bottom fan unit disposed on the base 1 and a top fan unit disposed on the top of the outer cover 2. The airflow system 5 is used to drive gas to flow in the inner cavity 4 to accelerate the cooling of the steel coil. The heat exchange and cooling system 6 includes a plurality of liquid-cooled heat exchange units arranged around the steel coil, the liquid-cooled heat exchange units being used to cool the steel coil; the cooling power of each liquid-cooled heat exchange unit can be adjusted individually, and the distance between at least some of the liquid-cooled heat exchange units and the steel coil can be adjusted individually.
[0017] This application achieves active, efficient and controllable cooling of steel coils by introducing an airflow system 5 and a heat exchange cooling system 6, which significantly shortens the cooling time, improves production efficiency, and helps ensure the cooling uniformity and product quality of the steel coils.
[0018] The base 1 is the load-bearing structure of the steel coil cooling device, used to stably place and support the steel coil to be processed. The outer cover 2 is a closed structure covering the base 1, forming a sealed inner cavity 4 together with the base 1 to isolate the external environment and control the internal atmosphere. The airflow system 5 refers to a device that drives gas to circulate in the inner cavity 4 through equipment such as fans, its function being to accelerate the cooling process of the steel coil. The heat exchange cooling system 6 is a device that uses liquid as a cooling medium to directly or indirectly remove heat from the steel coil through heat exchange units, aiming to achieve more efficient and precise cooling control. The liquid-cooled heat exchange unit is the basic component of the heat exchange cooling system 6, responsible for the specific heat exchange cooling function.
[0019] The outer cover 2 can be a cylindrical or square metal cover, and its inner wall can be provided with heat insulation material, which is more conducive to ensuring a consistent cooling rate inside the cavity.
[0020] The bottom fan unit can consist of one or more centrifugal or axial fans, installed inside or at the bottom of the base 1 and connected to the inner cavity 4. Similarly, the top fan unit can consist of one or more fans, installed on top of the outer casing 2 and connected to the inner cavity 4. The airflow system 5, through the bottom and top fan units, drives the gas (e.g., inert or protective gas) in the inner cavity 4 across the surface of the accelerated steel coil, achieving rapid cooling. For example, the bottom fan unit can blow gas upwards towards the steel coil, while the top fan unit draws the heated gas from the inner cavity 4. The drawn gas can be cooled by an external cooling system and then reintroduced from the bottom fan unit, thus forming an effective circulation.
[0021] The liquid-cooled heat exchange units can take the form of plate heat exchangers, shell-and-tube heat exchangers, or finned-tube heat exchangers, with coolant (such as water, oil, or other coolants) circulating inside. The liquid-cooled heat exchange units can be evenly distributed around the steel coil, for example, they can be located at the bottom, top, inner bore, and outer perimeter of the coil. The cooling power of each liquid-cooled heat exchange unit can be individually adjusted, which can be achieved by controlling the coolant flow rate or coolant temperature flowing through each heat exchange unit. For example, each liquid-cooled heat exchange unit can be equipped with an independent flow control valve and / or temperature sensor to precisely adjust its cooling capacity as needed. Furthermore, the distance between at least some of the liquid-cooled heat exchange units and the steel coil can be individually adjusted. This can be achieved through a mechanical telescopic device 605, a guide rail sliding mechanism, or a hydraulic drive device, allowing the heat exchange units to move closer to or further away from the steel coil, thereby changing the heat exchange efficiency. For example, some liquid-cooled heat exchange units can be mounted on a movable bracket, which is moved by a motor to adjust its distance from the steel coil.
[0022] The steel coil cooling device of this application achieves efficient cooling of the steel coil through the synergistic action of the airflow system 5 and the heat exchange cooling system 6. Specifically, during operation, the airflow system 5 is activated, and the bottom and top fan units begin operation, driving the gas in the inner cavity 4 to form forced convection around the steel coil. This forced convection can quickly remove heat from the surface of the steel coil and transfer it to the gas in the inner cavity 4. Simultaneously, the heat exchange cooling system 6 also starts operating, with multiple liquid-cooled heat exchange units beginning work. The coolant circulates within the liquid-cooled heat exchange units, absorbing the heat dissipated by the steel coil. Since the cooling power of each liquid-cooled heat exchange unit can be adjusted individually, and the distance between at least some of the liquid-cooled heat exchange units and the steel coil can be adjusted individually, the cooling intensity of each area can be precisely controlled according to the temperature distribution and cooling requirements at different locations on the steel coil. For example, for areas with higher temperatures, the cooling power of the corresponding liquid-cooled heat exchange unit can be increased, and it can be moved closer to the steel coil to improve local cooling efficiency; while for areas with lower temperatures, the cooling power can be reduced or the distance adjusted to avoid overcooling. The combined use of airflow system 5 and heat exchange cooling system 6 makes the cooling process of steel coils not only fast, but also significantly improves the uniformity of cooling, effectively avoiding the problems of slow cooling speed and uneven cooling in traditional natural cooling methods.
[0023] The steel coil cooling device of this application has significant advantages and innovations compared to existing technologies. Traditional steel coil cooling devices rely primarily on natural cooling after annealing, resulting in slow cooling rates, low production efficiency, and the possibility that prolonged high-temperature residence time of the steel coil may affect product quality. This application achieves active and efficient cooling of the steel coil by introducing an airflow system 5 and a heat exchange cooling system 6. The airflow system 5 accelerates heat dissipation through forced convection, while the heat exchange cooling system 6 directly removes heat through liquid-cooled heat exchange units. More importantly, the cooling power of each liquid-cooled heat exchange unit in the heat exchange cooling system 6 of this application can be individually adjusted, and the distance between at least some of the liquid-cooled heat exchange units and the steel coil can be individually adjusted. This innovative design makes the cooling process highly flexible and precise, allowing for localized optimized cooling based on temperature differences at different locations on the steel coil, effectively solving the problem of uneven cooling in traditional cooling methods and ensuring the final product quality of the steel coil. This active and controllable cooling method significantly shortens cooling time, improves production efficiency, and provides a more reliable guarantee for the quality control of the steel coil.
[0024] In some implementations, see Figure 1The liquid-cooled heat exchange unit includes multiple bottom heat exchange units 601, multiple top heat exchange units 602, multiple inner circumferential heat exchange units 603, and multiple outer circumferential heat exchange units 604. The bottom heat exchange units 601 are disposed on the top of the base 1. The top heat exchange units 602 are disposed above the steel coil, and the vertical position of each top heat exchange unit 602 can be adjusted independently. The inner circumferential heat exchange units 603 are disposed in the inner hole of the steel coil, and the radial position of each inner circumferential heat exchange unit 603 can be adjusted independently. The outer circumferential heat exchange units 604 are disposed around the outer circumference of the steel coil, and the radial position of each outer circumferential heat exchange unit 604 can be adjusted independently.
[0025] Specifically, the liquid-cooled heat exchange unit is subdivided into a bottom heat exchange unit 601, a top heat exchange unit 602, an inner circumferential heat exchange unit 603, and an outer circumferential heat exchange unit 604, with the purpose of localized cooling of different surface areas of the steel coil. The bottom heat exchange unit 601 is located at the top of the base 1 and is mainly used to cool the bottom surface of the steel coil. The top heat exchange unit 602 is located above the steel coil and is mainly used to cool the top surface of the steel coil. The vertical position of each top heat exchange unit 602 can be adjusted individually to accommodate steel coils of different heights or to achieve differentiated cooling of different areas on the top of the steel coil. The inner circumferential heat exchange unit 603 is located in the inner hole of the steel coil and is mainly used to cool the inner circumferential surface of the steel coil. The radial position of each inner circumferential heat exchange unit 603 can be adjusted individually to accommodate steel coils of different inner diameters or to achieve refined cooling of the inner hole area. The peripheral heat exchange unit 604 is arranged around the outer periphery of the steel coil and is mainly used to cool the outer peripheral surface of the steel coil. The radial position of each peripheral heat exchange unit 604 can be adjusted individually to adapt to steel coils with different outer diameters or to achieve fine cooling of the peripheral area.
[0026] This application's solution addresses the problem of traditional solutions where cooling units are arranged in a single, uniform manner, by subdividing the liquid-cooled heat exchange units into four types: bottom, top, inner circumference, and outer circumference. These units can be strategically positioned in key cooling areas of the steel coil. Because the vertical or radial positions of the top heat exchange unit 602, inner circumference heat exchange unit 603, and outer circumference heat exchange unit 604 can be individually adjusted, the distance between the cooling units and the various surfaces of the steel coil can be optimized according to actual conditions, ensuring that the cooling medium removes heat with optimal efficiency. This refined arrangement and adjustability allow the cooling system to better adapt to the complex three-dimensional geometry of the steel coil and precisely respond to the heat dissipation needs of different areas.
[0027] Furthermore, see Figure 1The top heat exchange unit 602 is connected to the top wall of the outer cover 2 via an independent, vertically extending telescopic device 605; the outer peripheral heat exchange unit 604 is connected to the peripheral wall of the outer cover 2 via an independent, radially extending telescopic device 605; a downwardly extending central tube 201 is provided at the center of the top wall of the outer cover 2, the central tube 201 extends into the inner hole of the steel coil, and the inner peripheral heat exchange unit 603 is connected to the outer peripheral surface of the central tube 201 via an independent, radially extending telescopic device 605.
[0028] Specifically, the aforementioned top heat exchange unit 602 is designed to be connected to the top wall of the outer casing 2 via an independent, vertically retractable telescopic device 605. "Independent" means that each top heat exchange unit 602 is equipped with its own dedicated telescopic device 605, ensuring that the vertical adjustment of one unit does not affect other units. "Vertically retractable" means that the device enables the top heat exchange unit 602 to move vertically, thereby changing its distance from the steel coil. This telescopic device 605 can be understood as a linear drive mechanism, such as an electric actuator, hydraulic cylinder, pneumatic cylinder, or lead screw drive mechanism, its purpose being to provide precise and controllable vertical displacement.
[0029] Similarly, the outer peripheral heat exchange unit 604 is connected to the peripheral wall of the outer casing 2 via an independent, radially telescopic telescopic device 605. "Radial telescopic" means that the device enables the outer peripheral heat exchange unit 604 to move radially, i.e., to extend or retract inwards or outwards, to adjust its distance from the outer peripheral surface of the steel coil. This radial telescopic device 605 can take the form of, for example, a rack and pinion mechanism, a linkage mechanism, or a linear guide rail with a drive, and its purpose is to achieve precise radial positioning of the outer peripheral heat exchange unit 604.
[0030] Furthermore, a downward-extending central tube 201 is provided at the center of the top wall of the outer casing 2. This central tube 201 is designed to extend into the inner bore of the steel coil, providing a stable mounting and support structure for the inner circumferential heat exchange unit 603. The inner circumferential heat exchange unit 603 is connected to the outer circumferential surface of the central tube 201 via an independent and radially telescopic telescopic device 605. This means that each inner circumferential heat exchange unit 603 also has independent radial adjustment capability, enabling precise changes in its distance from the inner wall of the steel coil. This connection method ensures the stability and operability of the inner circumferential heat exchange unit 603 within the inner bore of the steel coil.
[0031] This application's solution solves the problem of achieving precise and independent positional adjustment in complex environments by providing specific and independent telescopic devices 605 and support structures for liquid-cooled heat exchange units at different locations. The independent, vertically telescopic device 605 allows the top heat exchange unit 602 to be precisely adjusted vertically according to the temperature requirements of different areas on the top of the steel coil, avoiding uneven cooling caused by overall movement. The independent, radially telescopic device 605 allows the outer peripheral heat exchange unit 604 to flexibly move closer to or further away from the outer surface of the steel coil, achieving localized enhanced or weakened cooling on the outer side of the coil. Simultaneously, by setting a central tube 201 in the inner hole of the steel coil as a support platform for the inner peripheral heat exchange unit 603 and equipping it with an independent radial telescopic device 605, stable installation and precise radial adjustment of the inner peripheral heat exchange unit 603 in confined spaces are ensured, thereby effectively controlling the cooling of the inner hole area of the steel coil. This structural design ensures that the adjustments of each liquid-cooled heat exchange unit do not interfere with each other and can work collaboratively to achieve precise cooling control of the steel coil in all directions and multiple areas.
[0032] In some possible implementations, see Figures 2-4 The bottom heat exchange unit 601 is an annular heat exchange unit, and multiple bottom heat exchange units 601 are arranged concentrically; The top heat exchange unit 602 is an annular heat exchange unit, and multiple top heat exchange units 602 are arranged concentrically. The inner circumferential heat exchange unit 603 is a block-shaped heat exchange unit. All the inner circumferential heat exchange units 603 are divided into multiple inner circumferential heat exchange unit groups arranged in the vertical direction. Each inner circumferential heat exchange unit group includes multiple inner circumferential heat exchange units 603 arranged in a ring. The peripheral heat exchange unit 604 is a block heat exchange unit. All peripheral heat exchange units 604 are divided into multiple peripheral heat exchange unit groups arranged in the vertical direction. Each peripheral heat exchange unit group includes multiple peripheral heat exchange units 604 arranged in a ring.
[0033] The bottom heat exchange unit 601 is designed in a ring shape, and multiple bottom heat exchange units 601 are concentrically arranged on the top of the base 1. This ring-shaped structure can effectively cover the bottom planar area of the steel coil, while the concentric arrangement allows for differentiated cooling of different radial positions on the bottom of the steel coil. Similarly, the top heat exchange unit 602 is also designed in a ring shape, and multiple top heat exchange units 602 are concentrically arranged above the steel coil to achieve effective cooling of the top planar area of the steel coil.
[0034] Furthermore, the inner circumferential heat exchange unit 603 is designed as a block-shaped heat exchange unit. All inner circumferential heat exchange units 603 are divided into multiple inner circumferential heat exchange unit groups arranged in a vertical direction, and each inner circumferential heat exchange unit group includes multiple inner circumferential heat exchange units 603 arranged in a ring. This combination of ring arrangement and vertical stacking of block-shaped units allows the inner circumferential heat exchange units 603 to better conform to the inner surface of the steel coil and to perform layered cooling according to the height of the steel coil. Similarly, the outer circumferential heat exchange unit 604 is also designed as a block-shaped heat exchange unit, and all outer circumferential heat exchange units 604 are divided into multiple outer circumferential heat exchange unit groups arranged in a vertical direction, and each outer circumferential heat exchange unit group includes multiple outer circumferential heat exchange units 604 arranged in a ring. This structure allows the outer circumferential heat exchange units 604 to perform layered cooling around the outer circumferential surface of the steel coil.
[0035] The solution of this application concretizes the liquid-cooled heat exchange unit into annular and block-shaped units, and adopts a combination of concentric or annular arrangement and vertical stacking, so that the cooling system can better adapt to the cylindrical geometry of the steel coil. The annular bottom and top heat exchange units 602 can efficiently cool the upper and lower surfaces of the steel coil, while the block-shaped inner and outer circumferential heat exchange unit groups can perform refined and regional cooling of the inner and outer circumferential surfaces of the steel coil. This structured arrangement allows the cooling medium to cover all surfaces of the steel coil more evenly, thereby improving cooling efficiency and cooling uniformity.
[0036] In practical applications, improper airflow path design may lead to insufficient cooling in certain areas or airflow short-circuiting, affecting overall cooling efficiency and uniformity. Effective gas circulation and heat exchange are particularly challenging in the inner bore region of steel coils.
[0037] Therefore, in some implementation methods, see Figure 1 The bottom fan unit includes a first fan 501 disposed at the center of the base 1 and a plurality of second fans 502 disposed at the edge of the base 1. The top fan unit includes a third fan 503 disposed at the center of the top wall of the outer cover 2 and a plurality of fourth fans 504 disposed at the edge of the top wall of the outer cover 2. The upper end of the central pipe 201 is connected to the third fan 503, and the lower end is closed. A plurality of ventilation holes are distributed on the peripheral wall of the upper part of the central pipe 201. The first fan 501 and the second fan 502 are used to deliver gas to the inner cavity 4; the third fan 503 and the fourth fan 504 are used to extract gas from the inner cavity 4 to drive gas flow and accelerate the cooling of the steel coil.
[0038] Specifically, the first fan 501 is configured in the central area of the base 1, with its outlet or inlet aligned with the inner bore area of the steel coil to effectively treat the gas in that area. The second fan 502 is arranged at the edge of the base 1, its operating area being the annular gap between the outer periphery of the steel coil and the peripheral wall of the outer casing 2, ensuring gas flow in that area. The third fan 503 is located at the center of the top wall of the outer casing 2, typically aligned with the central axis of the steel coil. The fourth fan 504 is distributed along the edge of the top wall of the outer casing 2, corresponding radially to the second fan 502.
[0039] The multiple vents distributed on the upper peripheral wall of the central tube 201 are designed to allow gas to enter and exit the central tube 201 during the cooling process. This prevents the gas from being directly drawn away from the bottom of the central tube 201 by the first fan 501 during gas delivery, thus ensuring sufficient circulation and heat exchange of the gas within the inner bore area of the steel coil. These vents can be designed with different shapes, sizes, and distribution densities according to actual needs to optimize the airflow path.
[0040] During cooling, both the first fan 501 and the second fan 502 supply gas to the inner cavity 4, while the third fan 503 and the fourth fan 504 extract gas from the inner cavity 4. This push-pull combined airflow drive method can create strong convection, accelerating the flow of gas in the inner cavity 4, thereby efficiently removing heat from the steel coil. In particular, the vent design at the top of the central tube 201 ensures that even when the first fan 501 supplies gas to the inner cavity, the gas will not be directly short-circuited and sucked away by the central tube 201. Instead, it can fully mix and exchange heat with the gas in other areas of the inner cavity 4 through the vent, ensuring the cooling effect in the inner cavity area of the steel coil. In addition, the connection between the fourth fan 504 and the upper end of the central tube 201 further optimizes the gas extraction efficiency in the top area.
[0041] Through the above technical solution, this application achieves the following technical effects: the combined drive of the bottom and top fan units creates a highly efficient airflow circulation, significantly accelerating the cooling speed of the steel coil. More importantly, the vent design distributed on the upper peripheral wall of the central tube 201 effectively avoids airflow short-circuiting, ensuring the cooling effect in the inner hole area of the steel coil, making the cooling of the entire steel coil more uniform and thorough. This refined airflow control enables the cooling device to achieve superior performance throughout the cooling process.
[0042] In some embodiments, the steel coil cooling device further includes a temperature measuring system, which includes multiple temperature sensors and is used to measure the temperature at different locations on the steel coil.
[0043] Specifically, a temperature measurement system refers to a device used to monitor and acquire the temperature distribution of a steel coil in real time during the cooling process. Multiple temperature sensors can be understood as temperature-sensing elements arranged at different locations on, inside, or near the surface of the steel coil, such as thermocouples, infrared thermometers, and fiber optic temperature sensors. These temperature sensors are configured to independently or collaboratively acquire temperature data of the steel coil in different directions, including axial, radial, and circumferential. The purpose is to obtain refined temperature distribution information of the steel coil, providing accurate data support for subsequent adjustments to the cooling strategy.
[0044] The solution proposed in this application introduces a temperature measurement system, enabling the aforementioned steel coil cooling device to acquire real-time temperature information at different locations on the steel coil. It is precisely this ability to obtain detailed temperature distribution data that makes it possible to differentiate and precisely adjust the cooling power and location of each liquid-cooled heat exchange unit in the heat exchange cooling system 6. For example, when the temperature measurement system detects that the temperature in a certain area of the steel coil is too high, it can correspondingly increase the cooling power of the liquid-cooled heat exchange unit directly in that area or adjust its distance from the steel coil to accelerate cooling in that area; conversely, if the temperature in a certain area is too low, it can reduce the cooling power or adjust the distance to slow down cooling. This control mechanism based on real-time temperature feedback can effectively avoid the problems of localized overcooling or insufficient cooling, thereby achieving optimized control of the overall cooling process of the steel coil.
[0045] refer to Figure 5 This application provides a control method for controlling the steel coil cooling device described above to cool the steel coil, comprising the steps of: A1. Obtain the temperature and structural dimension information of the steel coil; A2. Determine the current cooling stage based on the temperature information and the structural dimension information; the cooling stage includes an early stage and a late stage; A3. Determine the cooling mode based on the current cooling stage; the cooling mode includes a hybrid cooling mode corresponding to the early stage and a liquid cooling mode corresponding to the later stage; in the hybrid cooling mode, the airflow system 5 and the heat exchange cooling system 6 are used for cooling simultaneously, and in the liquid cooling mode, only the heat exchange cooling system 6 is used for cooling. A4. Based on the temperature information and the determined cooling mode, adjust the power of the airflow system 5 and the position and cooling power of each liquid-cooled heat exchange unit in the heat exchange cooling system 6.
[0046] Specifically, the temperature information of the steel coil obtained in step A1 can be real-time temperature data acquired by temperature sensors located at different positions on the steel coil. These sensors can be distributed in key areas such as the inner hole, outer perimeter, top, and bottom of the steel coil to comprehensively reflect the temperature distribution of the steel coil. The structural dimensional information includes geometric parameters such as the outer diameter, height, and inner diameter of the steel coil, which are crucial for the subsequent formulation of cooling strategies.
[0047] In step A2, based on the acquired temperature and structural dimension information, the system can determine the current cooling stage of the steel coil. The early stage typically refers to the stage where the steel coil temperature is high and rapid cooling is required; at this time, the internal heat of the steel coil is significant, necessitating high-power cooling. The later stage refers to the stage where the steel coil temperature is relatively low and precise control is needed to avoid overcooling or the generation of thermal stress. This stage division helps to adopt different cooling strategies to adapt to the cooling requirements of the steel coil within different temperature ranges.
[0048] In step A3, the system selects the appropriate cooling mode based on the determined cooling stage. In the early stage, a hybrid cooling mode is used, simultaneously utilizing the airflow system 5 and the heat exchange cooling system 6. The airflow system 5 removes a large amount of heat through forced convection, while the heat exchange cooling system 6 provides more direct and efficient localized cooling. In the later stage, a liquid cooling mode is used, utilizing only the heat exchange cooling system 6. This is because in the later stages, the overall temperature of the steel coil is low, airflow cooling is inefficient and may lead to localized overcooling, while the liquid cooling heat exchange unit provides more precise and controllable cooling, helping to achieve uniform cooling and avoid unnecessary energy consumption.
[0049] In step A4, the system dynamically adjusts the operating power of the airflow system 5 and the position and cooling power of each liquid-cooled heat exchange unit in the heat exchange cooling system 6 based on the current temperature information and the determined cooling mode. For example, in the mixed cooling mode, the fan power of the airflow system 5 can be adjusted to a higher level, while the cooling power of the liquid-cooled heat exchange units and their distance from the steel coil are adjusted according to the temperature of different parts of the steel coil to achieve rapid and uniform cooling. In the liquid-cooled cooling mode, the airflow system 5 stops operating, and the steel coil is cooled precisely only by adjusting the cooling power and position of each liquid-cooled heat exchange unit to ensure that the steel coil ultimately reaches the required temperature and uniformity.
[0050] It should be noted that in actual work, the above steps will be executed repeatedly until the temperature of the steel coil (such as the characteristic temperature mentioned later) reaches the preset end temperature. Each cycle will be adjusted based on the real-time detected temperature information.
[0051] The proposed solution introduces an intelligent control method that dynamically adjusts the cooling strategy based on the real-time temperature and structural characteristics of the steel coil. In the early stages of cooling, the combined action of the airflow system 5 and the heat exchange cooling system 6 rapidly reduces the overall temperature of the steel coil, effectively shortening the cooling cycle. In the later stages of cooling, precise cooling is achieved solely through the heat exchange cooling system 6, avoiding localized overcooling or uneven cooling that might occur with airflow cooling, thus ensuring the cooling quality and final performance of the steel coil. This phased, modular control approach makes the cooling process more efficient, precise, and energy-saving.
[0052] The above technical solution significantly improves the cooling efficiency and uniformity of steel coils, effectively avoiding quality problems caused by improper cooling, while optimizing energy utilization and reducing production costs. This method transforms the cooling process of the steel coil cooling device from passive adaptation to active control, greatly enhancing the intelligence level and production efficiency of the cooling system.
[0053] In some implementations, the temperature information includes temperature values at multiple different locations on the steel coil; Step A2 includes: A201. Generate the temperature field of the steel coil based on the temperature information and the structural dimension information; A202. Determine the characteristic temperature of the steel coil based on the temperature field; A203. Compare the characteristic temperature with the preset temperature threshold to determine the current cooling stage.
[0054] Specifically, the temperature information is not a single temperature point, but a set of temperature data collected by multiple temperature sensors at different locations on the steel coil (e.g., axial, radial, circumferential, etc.). These temperature values can comprehensively reflect the temperature distribution of the steel coil during the cooling process.
[0055] The generation of the temperature field of the steel coil refers to constructing a continuous temperature distribution model of the inside and surface of the steel coil by using temperature values from multiple different locations and the structural dimensions of the steel coil, through methods such as interpolation, fitting, or numerical simulation. This temperature field can intuitively and accurately show the overall temperature state of the steel coil at any given time, providing a refined data foundation for subsequent cooling stage judgments.
[0056] In practical applications, determining the characteristic temperature of the steel coil refers to extracting a representative temperature value from the generated temperature field to characterize the overall cooling state of the steel coil. For example, this characteristic temperature could be the highest, lowest, or average temperature of the tested steel coil, or the temperature at a specific key location. By selecting an appropriate characteristic temperature, complex temperature field data can be simplified, facilitating phased judgments.
[0057] Furthermore, determining the current cooling stage by comparing the characteristic temperature with a preset temperature threshold involves comparing the determined characteristic temperature with a pre-set temperature threshold. If the characteristic temperature is higher than the temperature threshold, the current cooling stage is determined to be the early stage; otherwise, it is determined to be the later stage. The temperature threshold is determined empirically or theoretically based on the steel coil material properties, cooling process requirements, and the characteristics of different cooling stages. Through this comparison, the current cooling stage of the steel coil can be accurately determined, thus providing a basis for subsequent cooling mode selection and parameter adjustment.
[0058] This application's solution generates a refined temperature field for the steel coil by acquiring temperature values at multiple locations and combining them with the coil's structural dimensions. This comprehensive temperature field information allows for the accurate determination of the characteristic temperature representing the overall cooling state of the steel coil. By comparing this characteristic temperature with preset temperature thresholds, errors that might arise from judging the cooling stage based on a single temperature point can be avoided, thus achieving precise segmentation of the steel coil's cooling stages. This judgment mechanism, based on the temperature field and characteristic temperature, more realistically reflects the actual cooling process of the steel coil, providing a reliable basis for subsequent adjustments to the cooling strategy.
[0059] In some implementations, step A4 includes steps performed when the determined cooling mode is a hybrid cooling mode: A401a. Based on the temperature field, determine the temperature at which the steel coil is positioned directly opposite each of the liquid-cooled heat exchange units, and use this temperature as the facing temperature; A402a. For each position-adjustable liquid-cooled heat exchange unit, obtain the corresponding reference spacing based on the facing temperature; and obtain the reference cooling power of each liquid-cooled heat exchange unit based on the facing temperature; A403a. Obtain temperature gradient information based on the temperature field, and adjust the reference cooling power of each liquid-cooled heat exchange unit based on the temperature gradient information to obtain the corresponding target cooling power; A404a. Determine the target operating power of the airflow system 5 based on the characteristic temperature, the structural dimension information, and the physical property information of the steel coil; A405a. Control the operation of the airflow system 5 according to the target operating power, adjust the position of each adjustable liquid-cooled heat exchange unit so that the distance between it and the steel coil is equal to the corresponding reference distance, and adjust the cooling power of each liquid-cooled heat exchange unit according to the target cooling power.
[0060] Specifically, in step A401a, the direct-facing temperature refers to the temperature of the area on the steel coil surface directly opposite each liquid-cooled heat exchange unit. This temperature can be precisely extracted from the generated steel coil temperature field. Its purpose is to provide local, real-time temperature data for subsequent parameter adjustments of the liquid-cooled heat exchange units.
[0061] In step A402a, for each adjustable liquid-cooled heat exchange unit (such as top heat exchange unit 602, inner circumferential heat exchange unit 603, and outer circumferential heat exchange unit 604), the corresponding reference spacing and reference cooling power can be queried or calculated from a pre-established database or model based on their respective facing temperatures. For example, a lookup table can be constructed, storing the recommended spacing and cooling power between the liquid-cooled heat exchange unit and the steel coil at different facing temperatures. These reference values are initial settings based on experience or simulation optimization, aiming to provide a preliminary and reasonable cooling parameter.
[0062] Further, in step A403a, the temperature gradient information refers to the rate of temperature change between different regions inside or on the surface of the steel coil, such as axial and radial temperature gradients. This information can be obtained by performing differential or finite element calculations on the temperature field of the steel coil. The purpose of obtaining the temperature gradient information is to identify the degree and direction of temperature non-uniformity inside the steel coil. Based on this temperature gradient information, the reference cooling power obtained in step A402a can be finely adjusted to obtain the final target cooling power. For example, if at a certain height position, the temperature on the radially inner side is higher than the temperature on the outer side, and the difference is large (i.e., the radial temperature gradient at that height position is large), then it is necessary to adjust the reference cooling power of the inner circumferential heat exchange unit 603 and the outer circumferential heat exchange unit 604 corresponding to that height position, for example, by increasing the reference cooling power of the corresponding inner circumferential heat exchange unit 603 and / or decreasing the reference cooling power of the outer circumferential heat exchange unit 604.
[0063] In step A404a, the target operating power of the airflow system 5 is determined based on the characteristic temperature, structural dimensions, and physical properties of the steel coil (e.g., thermal conductivity, density, and specific heat capacity). This information comprehensively reflects the overall thermal state and cooling requirements of the steel coil. By establishing corresponding physical models or empirical formulas, the optimal cooling capacity that the airflow system 5 needs to provide in the current hybrid cooling stage can be calculated, thereby determining its target operating power.
[0064] Finally, in step A405a, the airflow system 5 is controlled to operate according to the target operating power determined above, and the positions of the adjustable liquid-cooled heat exchange units are adjusted so that their distance from the steel coil is equal to the corresponding reference distance. Simultaneously, the cooling power of each liquid-cooled heat exchange unit is adjusted according to the adjusted target cooling power. Thus, the synergistic effect of airflow cooling and liquid-cooled heat exchange is achieved, and the cooling intensity and position of the liquid-cooled heat exchange units can be dynamically and precisely adjusted according to the local temperature and temperature gradient of the steel coil.
[0065] This application's solution achieves refined and adaptive adjustment of the liquid cooling heat exchange unit's location and cooling power by introducing and utilizing information on the local surface temperature and temperature gradient of the steel coil. Simultaneously, the target operating power of the airflow system 5 is determined based on the overall thermal state of the steel coil, enabling airflow cooling and liquid cooling to work in tandem. It is precisely this multi-dimensional and refined parameter adjustment mechanism that allows the cooling process to better adapt to the complex temperature distribution of the steel coil, effectively avoiding the uneven cooling problems that may occur in traditional methods.
[0066] In some implementations, step A403a includes: The axial average temperature gradient and radial average temperature gradient of the steel coil are obtained based on the temperature field, and are used as the temperature gradient information. Based on the axial average temperature gradient and the expected height position of each liquid-cooled heat exchange unit, the first cooling power adjustment amount of each liquid-cooled heat exchange unit is determined; the expected height position refers to the expected height position after the position adjustment is completed. Based on the radial average temperature gradient and the expected radial position of each liquid-cooled heat exchange unit, the second cooling power adjustment amount of each liquid-cooled heat exchange unit is determined; the expected radial position refers to the radial position expected to be reached after the position adjustment is completed. Based on the first cooling power adjustment amount and the second cooling power adjustment amount, the reference cooling power of each liquid-cooled heat exchange unit is adjusted to obtain the corresponding target cooling power.
[0067] Specifically, the rate of temperature change of the steel coil in different directions, i.e., the temperature gradient, can be calculated based on the temperature field. The axial average temperature gradient refers to the average temperature change trend along the height of the steel coil (i.e., the axial direction), reflecting the temperature difference between the upper and lower parts of the coil. For example, the axial average temperature gradient can be obtained by dividing the difference between the average temperature at the top and bottom of the steel coil by the height of the coil. Alternatively, the steel coil can be divided into multiple flat regions along the axial direction, and the difference between the average temperature of adjacent flat regions and the distance between the flat regions (i.e., the center-to-center distance between flat regions in the vertical direction) can be calculated to obtain a series of local axial temperature gradients. Finally, the average value of these local axial temperature gradients is calculated as the axial average temperature gradient. The radial average temperature gradient refers to the average temperature variation trend along the radial direction of the steel coil (i.e., from the inner hole to the outer circumference), reflecting the temperature difference between the inner and outer parts of the coil. For example, the radial average temperature gradient can be obtained by dividing the difference between the average temperature of the inner and outer circumference surfaces of the coil by the coil thickness (i.e., the difference between the outer and inner radii). Alternatively, the steel coil can be divided into multiple cylindrical regions from the inside out, and the difference between the average temperature of adjacent cylindrical regions and the distance between the cylinders (i.e., the radial center-to-center distance between the cylindrical regions) can be calculated to obtain a series of local radial temperature gradients. Finally, the average value of these local radial temperature gradients is calculated as the radial average temperature gradient. This gradient information is used as the basis for subsequent cooling power adjustments.
[0068] Furthermore, when determining the first cooling power adjustment amount for each liquid-cooled heat exchange unit, the axial average temperature gradient of the steel coil and the expected height position of the liquid-cooled heat exchange unit after the position adjustment are taken into account (wherein, the height positions of the bottom heat exchange unit 601, the inner circumferential heat exchange unit 603 and the outer circumferential heat exchange unit 604 remain unchanged, and their expected height positions are actually equal to the pre-calibrated values; the height position of the top heat exchange unit 602 will be adjusted, therefore, its expected height position needs to be determined based on the reference spacing). For example, the difference between the maximum expected height position (generally the height position of the highest top heat exchange unit 602 after position adjustment) and the minimum expected height position (generally the height position of the bottom heat exchange unit 601) can be used as a reference height difference. The first cooling power adjustment amount of the liquid-cooled heat exchange unit at the minimum expected height position is set to zero. The first cooling power adjustment amount of the liquid-cooled heat exchange unit at the highest expected height position is calculated based on the axial average temperature gradient and a preset first conversion function (such as a linear function). The conversion result is used as the maximum axial amplitude adjustment amount. For other liquid-cooled heat exchange units, the maximum axial amplitude adjustment amount is calculated proportionally based on the ratio of the height difference between the expected height position of the liquid-cooled heat exchange unit and the minimum expected height position to the reference height difference. This can be expressed by the following formula: ; ; ; in, This represents the first cooling power adjustment for the i-th liquid-cooled heat exchange unit. Let be the expected height position of the i-th liquid-cooled heat exchange unit. The minimum expected height location, Location of maximum expected height For reference height difference, This represents the maximum axial adjustment amount. The axial average temperature gradient is... The first conversion function is preset (it can be a linear function).
[0069] Based on the first cooling power adjustment amount obtained in this way, when the temperature at the top of the steel coil is higher than the temperature at the bottom, the first cooling power adjustment amount of the liquid cooling heat exchange unit with a higher expected height is a larger positive value, thereby increasing the cooling power of the liquid cooling heat exchange unit with a higher expected height, which in turn allows the top of the steel coil to cool down faster and improves the temperature uniformity of the steel coil. When the temperature at the top of the steel coil is lower than the temperature at the bottom, the first cooling power adjustment amount of the liquid cooling heat exchange unit with a higher expected height is a smaller negative value, thereby decreasing the cooling power of the liquid cooling heat exchange unit with a higher expected height, which in turn allows the top of the steel coil to cool down more slowly and improves the temperature uniformity of the steel coil.
[0070] Similarly, when determining the second cooling power adjustment amount, the radial average temperature gradient of the steel coil and the radial position expected to be reached by the liquid-cooled heat exchange unit after the position adjustment are completed are taken into account (wherein, the radial positions of the bottom heat exchange unit 601 and the top heat exchange unit 602 remain unchanged, and their expected radial positions are actually equal to the pre-calibrated values; the radial positions of the inner circumferential heat exchange unit 603 and the outer circumferential heat exchange unit 604 will be adjusted, so their expected height positions need to be determined based on the reference spacing). For example, the difference between the maximum expected radial position (generally the radial position of the outermost peripheral heat exchange unit 604 after position adjustment) and the minimum expected height position (generally the radial position of the innermost peripheral heat exchange unit 603 after position adjustment) can be used as a reference radial distance difference. The second cooling power adjustment of the liquid-cooled heat exchange unit at the minimum expected radial position is set to zero. The second cooling power adjustment of the liquid-cooled heat exchange unit at the maximum expected radial position is calculated based on the radial average temperature gradient and a preset second conversion function (such as a linear function). This conversion result is used as the maximum radial amplitude adjustment. For other liquid-cooled heat exchange units, the maximum radial amplitude adjustment is calculated proportionally based on the ratio of the deviation of the expected radial position of the liquid-cooled heat exchange unit from the minimum expected radial position to the reference radial distance difference. This is expressed by the formula: ; ; ; in, This is the second cooling power adjustment amount for the i-th liquid-cooled heat exchange unit. Let be the expected radial position of the i-th liquid-cooled heat exchange unit. For the minimum expected radial position, For the maximum expected radial position, For reference, the difference in radial distance This represents the maximum radial amplitude adjustment. The radial average temperature gradient, This is a pre-defined second conversion function (which can be a linear function).
[0071] Based on the second cooling power adjustment amount obtained in this way, when the outer periphery temperature of the steel coil is higher than the inner periphery temperature, the second cooling power adjustment amount of the liquid cooling heat exchange unit with a larger expected radial position (i.e., farther from the central axis of the steel coil) is a larger positive value. This allows the cooling power of the liquid cooling heat exchange unit with a larger expected radial position to be increased more, thereby allowing the outer periphery of the steel coil to cool down faster and improving the temperature uniformity of the steel coil. When the outer periphery temperature of the steel coil is lower than the inner periphery temperature, the second cooling power adjustment amount of the liquid cooling heat exchange unit with a higher expected radial position is a smaller negative value. This allows the cooling power of the liquid cooling heat exchange unit with a larger expected radial position to be decreased more, thereby allowing the outer periphery of the steel coil to cool down more slowly and improving the temperature uniformity of the steel coil.
[0072] Finally, by superimposing or combining the first and second cooling power adjustments in a weighted manner, the reference cooling power of each liquid-cooled heat exchange unit can be corrected, thereby obtaining a more accurate target cooling power. This adjustment mechanism ensures that the cooling effect of each liquid-cooled heat exchange unit matches the local temperature conditions of its location and the overall temperature distribution trend of the steel coil.
[0073] This application's solution refines the temperature gradient information into axial average temperature gradient and radial average temperature gradient, and combines this with the expected height and radial positions of each liquid-cooled heat exchange unit to achieve precise adjustment of cooling power. Because the axial and radial temperature distributions of steel coils often differ significantly during cooling, and these differences dynamically change as cooling progresses, relying solely on single or generalized temperature gradient information for cooling power adjustment is insufficient to effectively address this complexity. By calculating the axial and radial temperature gradients separately and correlating them with the actual spatial positions of the liquid-cooled heat exchange units (i.e., the expected height and radial positions), the cooling load required by each liquid-cooled heat exchange unit can be more accurately assessed. For example, when the axial temperature gradient of the steel coil is large, liquid-cooled heat exchange units at different heights need to adjust their cooling power according to their height and axial temperature gradient to balance the axial temperature difference; when the radial temperature gradient is large, liquid-cooled heat exchange units at different radial positions need to adjust their cooling power according to their radial position and radial temperature gradient to balance the radial temperature difference. This dimensional and positional adjustment method allows the cooling effect of each liquid-cooled heat exchange unit to be applied more precisely to specific areas of the steel coil, thereby effectively solving the problems of low cooling efficiency or local overcooling / overheating caused by uneven temperature distribution.
[0074] In some implementations, step A4 includes steps performed when the determined cooling mode is liquid cooling mode: A401b. Based on the temperature field, determine the temperature of the position of the steel coil directly opposite each of the liquid-cooled heat exchange units, and use it as the facing temperature (for details, please refer to step A401a above). A402b. For each adjustable liquid-cooled heat exchange unit, obtain the corresponding reference spacing based on the facing temperature; and obtain the reference cooling power of each liquid-cooled heat exchange unit based on the facing temperature (for details, refer to step A402a above). A403b. Obtain temperature gradient information based on the temperature field, and adjust the reference cooling power of each liquid-cooled heat exchange unit based on the temperature gradient information to obtain the corresponding target cooling power (the specific process can be referred to step A403a above). A404b. Adjust the position of each adjustable liquid-cooled heat exchange unit so that the distance between it and the steel coil is equal to the corresponding reference distance, and adjust the cooling power of each liquid-cooled heat exchange unit according to the target cooling power (for details, please refer to the relevant content of step A405a above).
[0075] In some preferred embodiments, in step A402b, when the facing temperature is less than a preset temperature threshold, the corresponding reference spacing can be determined to be zero.
[0076] Specifically, the preset temperature threshold can be understood as a pre-set temperature limit used to determine whether the steel coil has reached a temperature suitable for direct contact cooling, that is, at this temperature, the liquid cooling heat exchange unit can directly contact the steel coil without damage.
[0077] Based on the solution of this application, when the local temperature of the steel coil is lower than the preset temperature threshold, it indicates that the area has reached or is close to the target cooling temperature, and the temperature of the steel coil is low enough that the liquid-cooled heat exchange unit can directly contact the steel coil without damaging it (in fact, for the bottom heat exchange unit 601, since it needs to be in constant contact with the steel coil, its performance and structural requirements are usually more stringent than other liquid-cooled heat exchange units, for example, it may be made of more heat-resistant materials, have thicker walls, or adopt a more complex protective structure). In this specific situation, setting the corresponding reference spacing to zero means that the liquid-cooled heat exchange unit will be instructed to adjust to a position in direct contact with the steel coil. The purpose of this direct contact is to achieve more efficient liquid-cooled heat exchange, thereby further reducing overall energy consumption.
[0078] This application's solution introduces a preset temperature threshold and intelligently adjusts the reference spacing of the liquid-cooled heat exchange units based on this threshold, aiming to optimize heat exchange efficiency and reduce energy consumption in liquid cooling mode. Specifically, when the temperature of a certain location on the steel coil measured by the temperature measurement system is lower than the preset temperature threshold, the system determines that the area has reached a sufficient degree of cooling and meets the conditions for efficient cooling by direct contact between the liquid-cooled heat exchange units and the steel coil. At this time, the reference spacing of the corresponding liquid-cooled heat exchange unit is set to zero, effectively instructing the liquid-cooled heat exchange unit to adjust to a position of direct contact with the steel coil to fully utilize the efficient heat exchange advantages brought by direct contact. This mechanism avoids the problem of failing to fully utilize direct contact cooling when the steel coil temperature is suitable for efficient cooling, thereby achieving better heat exchange effect and effectively reducing unnecessary cooling energy consumption.
[0079] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.
Claims
1. A steel coil cooling device, characterized in that, Includes a base (1), an outer cover (2), an airflow system (5), and a heat exchange and cooling system (6). The base (1) is used to support the steel coil, and the outer cover (2) is placed on the base (1) and forms an inner cavity (4) with the base (1) to accommodate the steel coil. The airflow system (5) includes a bottom fan unit disposed on the base (1) and a top fan unit disposed on the top of the outer cover (2). The airflow system (5) is used to drive gas to flow in the inner cavity (4) to accelerate the cooling of the steel coil. The heat exchange cooling system (6) includes a plurality of liquid-cooled heat exchange units arranged around the steel coil, the liquid-cooled heat exchange units being used to cool the steel coil; the cooling power of each liquid-cooled heat exchange unit can be adjusted individually, and the distance between at least some of the liquid-cooled heat exchange units and the steel coil can be adjusted individually.
2. The steel coil cooling device according to claim 1, characterized in that, The liquid-cooled heat exchange unit includes multiple bottom heat exchange units (601), multiple top heat exchange units (602), multiple inner circumferential heat exchange units (603), and multiple outer circumferential heat exchange units (604); the bottom heat exchange units (601) are disposed on the top of the base (1); the top heat exchange units (602) are disposed above the steel coil, and the vertical position of each top heat exchange unit (602) can be adjusted individually; the inner circumferential heat exchange units (603) are disposed in the inner hole of the steel coil, and the radial position of each inner circumferential heat exchange unit (603) can be adjusted individually; the outer circumferential heat exchange units (604) are disposed around the outer circumference of the steel coil, and the radial position of each outer circumferential heat exchange unit (604) can be adjusted individually.
3. The steel coil cooling device according to claim 2, characterized in that, The top heat exchange unit (602) is connected to the top wall of the outer cover (2) by an independent and vertically telescopic device (605); the outer peripheral heat exchange unit (604) is connected to the peripheral wall of the outer cover (2) by an independent and radially telescopic device (605); a downwardly extending central tube (201) is provided at the center of the top wall of the outer cover (2), the central tube (201) extends into the inner hole of the steel coil, and the inner peripheral heat exchange unit (603) is connected to the outer peripheral surface of the central tube (201) by an independent and radially telescopic device (605).
4. The steel coil cooling device according to claim 2, characterized in that, The bottom heat exchange unit (601) is an annular heat exchange unit, and multiple bottom heat exchange units (601) are arranged concentrically; The top heat exchange unit (602) is an annular heat exchange unit, and multiple top heat exchange units (602) are arranged concentrically; The inner circumferential heat exchange unit (603) is a block heat exchange unit. All the inner circumferential heat exchange units (603) are divided into multiple inner circumferential heat exchange unit groups arranged in the up and down direction. Each inner circumferential heat exchange unit group includes multiple inner circumferential heat exchange units (603) arranged in a ring. The peripheral heat exchange unit (604) is a block heat exchange unit. All peripheral heat exchange units (604) are divided into multiple peripheral heat exchange unit groups arranged in the vertical direction. Each peripheral heat exchange unit group includes multiple peripheral heat exchange units (604) arranged in a ring.
5. The steel coil cooling device according to claim 3, characterized in that, The bottom fan unit includes a first fan (501) located at the center of the base (1) and a plurality of second fans (502) located at the edge of the base (1). The top fan unit includes a third fan (503) located at the center of the top wall of the outer cover (2) and a plurality of fourth fans (504) located at the edge of the top wall of the outer cover (2). The upper end of the central pipe (201) is connected to the third fan (503), and the lower end is closed. A plurality of ventilation holes are distributed on the peripheral wall of the upper part of the central pipe (201). The first fan (501) and the second fan (502) are used to deliver gas to the inner cavity (4); the third fan (503) and the fourth fan (504) are used to extract gas from the inner cavity (4) to drive gas flow and accelerate the cooling of the steel coil.
6. A control method, characterized in that, The method for controlling the cooling of steel coils by the steel coil cooling device according to any one of claims 1-5 includes the following steps: A1. Obtain the temperature and structural dimension information of the steel coil; A2. Determine the current cooling stage based on the temperature information and the structural dimension information; the cooling stage includes an early stage and a late stage; A3. Determine the cooling mode according to the current cooling stage; the cooling mode includes a mixed cooling mode corresponding to the early stage and a liquid cooling mode corresponding to the later stage; in the mixed cooling mode, the airflow system (5) and the heat exchange cooling system (6) are used for cooling at the same time, and in the liquid cooling mode, only the heat exchange cooling system (6) is used for cooling. A4. Based on the temperature information and the determined cooling mode, adjust the power of the airflow system (5) and the position and cooling power of each liquid-cooled heat exchange unit in the heat exchange cooling system (6).
7. The control method according to claim 6, characterized in that, The temperature information includes temperature values at multiple different locations on the steel coil; Step A2 includes: A201. Generate the temperature field of the steel coil based on the temperature information and the structural dimension information; A202. Determine the characteristic temperature of the steel coil based on the temperature field; A203. Compare the characteristic temperature with the preset temperature threshold to determine the current cooling stage.
8. The control method according to claim 7, characterized in that, Step A4 includes the steps performed when the determined cooling mode is a hybrid cooling mode: A401a. Based on the temperature field generated based on the temperature information, determine the temperature of the position of the steel coil directly opposite each of the liquid-cooled heat exchange units, and use this temperature as the facing temperature; A402a. For each position-adjustable liquid-cooled heat exchange unit, obtain the corresponding reference spacing based on the facing temperature; and obtain the reference cooling power of each liquid-cooled heat exchange unit based on the facing temperature; A403a. Obtain temperature gradient information based on the temperature field, and adjust the reference cooling power of each liquid-cooled heat exchange unit based on the temperature gradient information to obtain the corresponding target cooling power; A404a. Determine the target operating power of the airflow system (5) based on the characteristic temperature, the structural size information, and the physical property information of the steel coil; A405a. Control the operation of the airflow system (5) according to the target operating power, adjust the position of each adjustable liquid-cooled heat exchange unit so that the distance between it and the steel coil is equal to the corresponding reference distance, and adjust the cooling power of each liquid-cooled heat exchange unit according to the target cooling power.
9. The control method according to claim 8, characterized in that, Step A403a includes: The axial average temperature gradient and radial average temperature gradient of the steel coil are obtained based on the temperature field, and are used as the temperature gradient information. Based on the axial average temperature gradient and the expected height position of each liquid-cooled heat exchange unit, the first cooling power adjustment amount of each liquid-cooled heat exchange unit is determined; the expected height position refers to the expected height position after the position adjustment is completed. Based on the radial average temperature gradient and the expected radial position of each liquid-cooled heat exchange unit, the second cooling power adjustment amount of each liquid-cooled heat exchange unit is determined; the expected radial position refers to the radial position expected to be reached after the position adjustment is completed. Based on the first cooling power adjustment amount and the second cooling power adjustment amount, the reference cooling power of each liquid-cooled heat exchange unit is adjusted to obtain the corresponding target cooling power.
10. The control method according to claim 7, characterized in that, Step A4 includes the steps performed when the determined cooling mode is liquid cooling mode: A401b. Based on the temperature field generated according to the temperature information, determine the temperature of the position of the steel coil directly opposite each of the liquid-cooled heat exchange units, and use it as the facing temperature; A402b. For each position-adjustable liquid-cooled heat exchange unit, obtain the corresponding reference spacing based on the facing temperature; and obtain the reference cooling power of each liquid-cooled heat exchange unit based on the facing temperature; A403b. Obtain temperature gradient information based on the temperature field, and adjust the reference cooling power of each liquid-cooled heat exchange unit based on the temperature gradient information to obtain the corresponding target cooling power; A404b. Adjust the position of each adjustable liquid-cooled heat exchange unit so that its distance from the steel coil is equal to the corresponding reference distance, and adjust the cooling power of each liquid-cooled heat exchange unit according to the target cooling power.