Post-rolling stable position reduction type online cooling device and control method thereof

Abstract

The invention discloses an after-rolling stable position reduction type online cooling device and a control method thereof, and relates to the technical field of hot rolling cooling, the after-rolling stable position reduction type online cooling device comprises N unit type cooling mechanisms arranged in the moving direction of a cooling roller way, and each unit comprises a lifting assembly, a cooling assembly, a supporting assembly, a driving assembly and a control system. The lifting assembly drives the grating type movable framework to vertically ascend and descend through a spiral elevator, the upper collecting pipe is driven to adjust the distance between the upper collecting pipe and a hot-rolled product, the supporting assemblies are symmetrically distributed through supporting beams with I-shaped sections, and the height of the overall structure is reduced. The control method is based on unitized layout, the upper headers of a single unit are configured into 5-8 groups, the height, the flow and the cooling mode are independently regulated and controlled by the control system, and different process requirements are dynamically and accurately met. Through structure simplification, load distribution optimization and modular control, the problems that a traditional device is poor in stability, low in regulation and control precision and high in maintenance cost are solved, the cooling effect is remarkably improved, and the process adaptability and economical efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hot rolling cooling, and in particular to a post-rolling stable position reducing type online cooling device and a control method thereof. Background Art

[0002] During the hot rolling process of metal materials, controlled cooling is crucial to improving product performance. Appropriate cooling technology can enable products such as metal plates and strips to obtain ideal grain size, metallographic structure, and precipitation distribution, thereby optimizing key mechanical indicators such as strength, plasticity, toughness, and fatigue performance, and extending actual service life. With the advancement of modern industrialization, in order to meet the increasingly stringent requirements of downstream industries for the quality of metal materials such as steel, advanced cooling processes such as ACC (accelerated cooling) and UFC (ultra-fast cooling) have developed rapidly, and higher requirements have been put forward for the refined and intelligent control of corresponding cooling devices.

[0003] Chinese patent publication number CN116121503A discloses a continuous quenching and cooling device for steel sheet piles, which includes: a frame, a first lifting mechanism, a second lifting mechanism, and a plurality of quenching units arranged along the length direction of the frame, wherein the quenching unit includes a transmission mechanism and a water spraying mechanism, and the lifting mechanism inside the frame is used to adjust the height of the header to adapt to different specifications of steel and cooling process requirements. It can be seen that although the above technical solution discloses that the lifting mechanism is used to adapt to different process requirements, the overall height of the structure is relatively high. Due to the characteristics of the frame structure, it is easy to cause structural instability due to the high center of gravity when bearing a large load. Moreover, the use of a large number of steel structures for the fixed frame not only increases the material cost, but also makes the device as a whole bulky, and the installation and maintenance are difficult. In addition, the traditional cooling device is usually equipped with more than 10 groups of headers and is uniformly controlled, which leads to great limitations in the control accuracy and applicable process. If it is split into a unit cooling mechanism, it will face the problem of a sharp increase in the amount of basic steel structure and an increase in production cost.

[0004] Therefore, in order to adapt to the concepts of green manufacturing and sustainable development, it is urgent to develop a cooling device that integrates high stability, high-precision adjustment and economic practicality to meet the diverse adaptation needs of advanced cooling processes. Summary of the invention

[0005] In response to the technical problems raised above, the present invention provides a post-rolling stable position reducing type online cooling device and a control method thereof, so as to overcome the problems of the cooling device in the prior art such as complicated structural design, low control accuracy, low adaptability and high subsequent maintenance cost.

[0006] To achieve the above purpose, the technical means adopted by the present invention are as follows: An on-line cooling device for post-rolling position stabilization and configuration reduction, comprising: N unitary cooling mechanisms arranged continuously or at intervals along the moving direction of the cooling roller table, where N ≥ 1; Each of the unitary cooling mechanisms includes: A lifting assembly, including a screw lift and a moving framework connected thereto. The screw lift is fixed to the upper part of the support beam, and the lower part of the moving framework is installed with and bears an upper header; A cooling assembly, including the upper header and a lower header. The upper header is connected to a cooling medium supply system through a water inlet pipeline; A support assembly, including a support beam with an I-shaped cross-section. The support beams are symmetrically distributed at the bottom of the cooling device and fixed to the ground; A control system configured to independently regulate the height, flow rate, and cooling mode of the upper headers in each unitary cooling mechanism.

[0007] Further, the moving framework is a grid-type steel structure. The internal hollow area thereof houses the screw lift, and the grid size is adapted to the installation layout of the upper header to ensure that the upper header receives a uniform supporting force.

[0008] Further, the number of the support beams is 4 groups, which are symmetrically distributed. Its height H Z is adapted to the minimum distance H min between the upper header and the hot-rolled product, and the adjustable height H of the screw lift satisfies H = H max −H min where H max is the maximum adjustment distance.

[0009] Further, the support beam on the side close to the drive of the cooling roller table adopts a split structure, which is divided into three parts in the vertical direction: upper, middle, and lower: The upper and middle parts are each a single small support beam; The lower part includes two small support beams, which are arranged in the gap between adjacent roller table drives; The small support beam in the middle is widened in the horizontal direction to connect the upper and lower parts.

[0010] Further, the screw lift is configured with a guiding member, including a guiding column fixed to the support beam and a guiding sleeve fixed to the moving framework. The guiding sleeve slides along the guiding column, restricting the lifting trajectory of the moving framework to a vertical linear motion.

[0011] Further, the guiding member further includes a positioning pin for ensuring the installation position accuracy between the guiding sleeve and the guiding column.

[0012] Further, it also includes a driving component, which includes a lifting motor, a commutator and connecting lines. The lifting motor and the commutator are installed on the upper part of the moving frame, and the moving frame is driven to vertically lift through the screw lift.

[0013] Further, the support beam and the moving frame are topologically optimized based on a mathematical algorithm. The optimization parameters include material properties, load distribution, space limitations and economic costs, forming a lightweight support structure.

[0014] Further, the number of upper headers in a single unitary cooling mechanism is 5 - 8 groups, and each group of upper headers is equipped with an independent valve group, and its opening and closing and flow rate are independently regulated by the control system.

[0015] The present invention also provides a control method for an on-line cooling device for post-rolling position stabilization and configuration reduction, including: S1. Real-time collect the position, transmission speed, temperature distribution, specification parameters and pre-sequence cooling process parameters of the hot-rolled product; S2. Based on a preset production optimization model, determine the target cooling process parameters of each unitary cooling mechanism according to the parameters in S1. The target cooling process parameters include: upper header height, cooling mode and controlled cooling method selection, flow rate distribution and opening and closing time sequence of each group of headers; S3. Dynamically adjust the vertical height and cooling mode of the upper headers in each unitary cooling mechanism through the control system, and independently control the controlled cooling method and flow rate of each group of upper headers, so as to realize sectional differential cooling of the hot-rolled product during continuous transmission; Wherein, the cooling mode includes the switching of conventional cooling, accelerated cooling and ultra-fast cooling, and the cooling modes of different unitary cooling mechanisms can be independently configured; the controlled cooling method includes the switching of air cooling, laminar flow cooling and jet cooling, and the controlled cooling methods of each group of upper headers can be independently configured.

[0016] Due to the adoption of the above technical solutions, compared with the prior art, the present invention has the following advantages: 1. An on-line cooling device for post-rolling position stabilization and configuration reduction and its control method provided by the present invention, by adopting a unitary cooling mechanism, a grid-type moving frame and a split I-shaped support beam, abandon the redundant structure of the traditional four-column frame, improve the space utilization rate, reduce the total height of the device, reduce the amount of basic steel structure, and greatly save the material cost; at the same time, the I-shaped cross-section support beam and the symmetrical layout design optimize the load distribution, and significantly improve the anti-deformation ability and operation stability of the device.

[0017] 2. The on-line cooling device with post-rolling position stabilization and configuration reduction and its control method provided by the present invention. Each unitized cooling mechanism is configured with 5 to 8 groups of upper headers. Combined with four independently driven screw elevators and an integrated control system, it can dynamically adjust the height, cooling mode, controlled cooling method, opening and closing of each group of headers and the flow rate of the upper headers in each unit in real time, accurately adapting to the cooling requirements of different specifications of hot-rolled products (such as the thickness and material differences of strip materials), improving the hit rate of the cooling process, and avoiding the regulation limitations in the traditional unified control mode.

[0018] 3. The on-line cooling device with post-rolling position stabilization and configuration reduction and its control method provided by the present invention. The grid-like hollow design of the moving frame and the split support beam structure facilitate the maintenance and replacement of key components such as screw elevators and upper headers, without the need to disassemble the device as a whole, improving the maintenance efficiency. In addition, the unitized modular layout supports the flexible increase, decrease or spaced arrangement of the cooling mechanisms on the production line, quickly responding to the adaptation requirements of diverse cooling processes, and having strong expandability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a three-dimensional structure diagram of the on-line cooling device with post-rolling position stabilization and configuration reduction according to an embodiment of the present invention; Figure 2 It is a top view of the on-line cooling device with post-rolling position stabilization and configuration reduction according to an embodiment of the present invention; Figure 3 It is a left view of the on-line cooling device with post-rolling position stabilization and configuration reduction according to an embodiment of the present invention; Figure 4 It is a front view of the on-line cooling device with post-rolling position stabilization and configuration reduction according to an embodiment of the present invention; Figure 5 It is a structural diagram of the support beam of the on-line cooling device with post-rolling position stabilization and configuration reduction according to an embodiment of the present invention; Figure 6 It is a structural diagram of the screw elevator of the on-line cooling device with post-rolling position stabilization and configuration reduction according to an embodiment of the present invention; Figure 7 It is a flowchart of the control method of the on-line cooling device with post-rolling position stabilization and configuration reduction according to an embodiment of the present invention.

[0021] In the figure: 1. Lifting assembly; 11. Screw lift; 111. Guide post; 112. Guide sleeve; 113. Positioning pin; 12. Moving frame; 2. Cooling assembly; 21. Upper header; 22. Lower header; 23. Water inlet pipeline; 3. Support assembly; 31. Support beam; 311. Small support beam; 4. Driving assembly; 41. Lifting motor; 42. Commutator; 43. Connection line; 5. Control system; 6. Cooling roller table; 61. Roller table drive; 62. Roller table support. Detailed implementation manners

[0022] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0023] To make the purpose, technical solutions and advantages of the implementation of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout; the described embodiments are some but not all of the embodiments of the present invention; the embodiments described below with reference to the drawings and the directional terms are all exemplary and are intended to explain the present invention and should not be construed as limiting the present invention; based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention. Parts and equipment all adopt conventional models in the prior art, and the circuit connections adopt conventional connection methods in the prior art, which will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. The embodiments of the present invention will be described in detail below with reference to the drawings: Embodiment As Figures 1 to 6 shown, an on-line cooling device for post-rolling stability and configuration reduction includes: N unitary cooling mechanisms arranged continuously or at intervals along the moving direction of the cooling roller table, where N≥1; Each of the unitary cooling mechanisms includes: As Figure 1 and Figure 2 shown, the lifting assembly 1 includes 4 groups of symmetrically arranged screw lifts 11 and the moving frame 12 connected thereto. To improve space utilization, the moving frame 12 is a grid-type steel structure composed of multiple spaces connected in combination. On the basis of ensuring sufficient strength, the weight of the moving frame 12 itself is reduced, and at the same time, the material cost and the driving load during movement are also reduced; and the hollow part therein can not only conveniently arrange equipment such as the screw lift 11, making the structure of the entire device more compact, but also is conducive to the maintenance and repair of the equipment, facilitating the staff to enter the interior through the hollow part for operation.

[0024] The cooling assembly 2 includes an upper header 21, a lower header 22, and an upper header water inlet pipe 23. The upper header 21 is installed and carried on the lower part of the mobile frame 12, and is used to spray water to cool the upper surface of hot-rolled products such as metal plates and strips. The lower header 22 is arranged between each group of cooling rollers 6, and is used to spray water to cool the lower surface of the hot-rolled products. The mobile frame 12 connects the upper header 21 and the spiral elevator 11. According to the process cooling requirements, when the spiral elevator 11 controls the mobile frame 12 to move up and down in the vertical direction, the upper header 21 will be driven at the same time, and its position height and the distance between it and the hot-rolled product will be adjusted. When maintaining and replacing the upper header 21, this connection arrangement also provides a better operating space. There is no need to dismantle the entire mobile frame 12. Only the corresponding upper header 21 part needs to be dismantled, which effectively reduces the maintenance cost and repair time. However, it should be noted that the size of the grid-type steel structure of the mobile frame 12 should be compatible with the size of the upper header 21, that is, there should be sufficient installation space to arrange the upper header 21 and its related guard plates, pipes and other components. For example, if there is a height difference between each group of upper headers 21 or different cooling areas are divided, the size of the grid-type steel structure should be adapted thereto; and at the same time, the connection strength between adjacent cells should also be taken into account so that the upper header 21 can be uniformly supported during the lifting process to withstand the weight of itself and the coolant as well as various loads such as inertial force and impact force generated during movement and cooling.

[0025] Furthermore, if Figure 1 and Figure 4 As shown, the support assembly 3 includes four groups of support beams 31, which are symmetrically distributed at the bottom of the cooling device so that the loads are evenly distributed at each support point to prevent local overload. The cross section of the support beam 31 can adopt an I-shaped structure. Compared with a solid beam structure, this cross-sectional shape can effectively reduce its own weight and improve material utilization while ensuring sufficient strength under the same load-bearing capacity requirements. The specific size of the I-shaped structure is adapted to the layout span of the cooling device and the load bearing capacity of a single group of support beams, such as Figure 1 As shown, when designing the support beam structure, the size and spatial arrangement of the moving frame 12, the upper header 21, the roller drive 61 and the roller support 62 should be considered to reasonably allocate the load and limited space. In the traditional fixed frame structure, the elevator is mainly arranged on the crossbeam of the frame, has multiple transmission components, and the total height of the device is usually more than 5m, and the overall center of gravity is high. In the present invention, as Figure 1As shown in the figure, the screw lift 11 is fixed to the upper part of the support beam 31. At the same time, the linkage design such as the transmission shaft is abandoned, and the screw lift 11 is directly connected to the moving frame 12, which simplifies the structure and improves the transmission efficiency. Under this design, the total height of the cooling device is only 3.6m, which is nearly 30% lower than that of the traditional fixed frame, effectively improving the stability of the device. According to reliable engineering cost statistics, compared with the traditional frame-type cooling device, under the same header configuration conditions, the consumption of the basic steel structure of the cooling device of the present invention is reduced by more than 20%, greatly reducing the production cost. In addition, as the basic load-bearing structure of the whole device, the support beam 31 has sufficient strength and stiffness, which can provide a more stable installation foundation for the screw lift 11, enabling it to work reliably when bearing the weight and moving load of related components, and avoiding deformation or damage due to excessive local stress, which affects the control accuracy of the cooling process.

[0026] Further, as Figure 1As shown in the figure, the drive assembly 4 includes one lifting motor 41 and two groups of commutators 42 installed on the upper part of the moving frame 12, as well as several connecting lines 43 and a protective cover for protecting the connecting lines 43. Among them, the connecting lines 43 are used to connect the lifting motor 41, the commutator 42 and the screw lift 11; the lifting motor 41 is an industrial motor with high torque output and precise speed control characteristics, providing the driving force required for the device to lift; the commutator 42 is used to cooperate with the lifting motor 41 to distribute and adjust the direction of the power of the lifting motor 41 according to the control signal, realizing the switching of the rising and falling actions of the screw lift 11 and the speed control, ensuring the accuracy and flexibility of the device lifting action. When the cooling device is running, the integrated control system 5 drives the screw lift 11 by controlling the lifting motor 41 and the commutator 42, and controls the moving frame 12 carrying the upper header 21 to move up and down in the vertical direction, realizing the precise adjustment of its position height and the distance from the hot-rolled product. And in this embodiment, when the position of the moving frame 12 changes, the lifting motor 41 and the commutator 42 also move with the moving frame 12 at the same time. This arrangement makes the lifting motor 41, the commutator 42 and the screw lift 11 form a relatively compact whole in space. During the movement, they move together as an integrated unit, reducing the need for additional space; and compared with the scattered arrangement of components such as the lifting motor 41 and the commutator 42, the power transmission distance between the lifting motor 41 and the screw lift 11 is relatively fixed and short. At different height positions, the power output by the lifting motor 41 can more accurately control the lifting speed and direction of the screw lift 11 through the commutator 42, which is beneficial to realizing efficient function integration in a limited space. In addition, the lifting motor 41 and the commutator 42 moving with the moving frame 12 also make the center of gravity distribution of the whole device more reasonable. During the movement, their weights can be reasonably balanced and supported as part of the moving frame 12. Compared with the situation where components such as the lifting motor 41 are fixed in other positions, this arrangement can reduce the structural instability factors caused by the weight change of the moving components. For example, when the moving frame 12 rises or falls, the weights of the lifting motor 41 and the commutator 42 will not generate additional unbalanced torques on other parts of the device due to the position change, thus improving the stability of the device during the lifting process.

[0027] Further, in actual application, considering the production requirements of strip materials with different thicknesses and different materials, during the process of adjusting the height of the upper header 21, the height H of the support beam 31 z combined with the adjustable height H of the screw lift 11 can meet the minimum distance H between the upper header 21 and the hot-rolled product min to the maximum distance H max of the adjustment range, and can flexibly adapt to various production process requirements. Such as Figure 1As shown, the height of the cooling roller table 6 from the ground is set to 0.92 m. According to production requirements, H min is designed to be 0.72 m, and H max is 1.72 m. H = H max −H min = 1.00 m. At the same time, in order to adapt to H min , the height H z of the support beam 31 is designed to be 1.81 m to ensure that the upper header 21 can be in a suitable working position, and the overall center of gravity of the device is reasonably distributed and the structure is stable.

[0028] Furthermore, the cooling roller table 6 is stably supported from below by the roller table bracket 62 and is equipped with multiple groups of roller table drives 61 arranged on one side of it to drive the roller table to rotate and realize the transmission of hot-rolled products. To adapt to the arrangement of the roller table drives 61 and make the structure more compact, the support beam 31 arranged on the same side as it adopts a split support beam structure, and its total height is kept consistent with that of other conventional support beams to ensure the levelness and stability of the entire device. The structures and connection details of each part are as Figure 5 shown. In the vertical direction, it includes upper, middle, and lower parts. The cross-sectional shapes and dimensions of each part are designed according to the local loads borne and the requirements of the overall structural stability. Among them, the upper and middle parts are each a single small support beam 311. The small support beam 311 in the middle part plays a role in connecting the upper and lower parts in the vertical direction and expands the connection area and load-bearing capacity by increasing the width in the horizontal direction to better disperse the loads transmitted from the upper part and provide a stable foundation for the lower connection. The lower part includes two small support beams 311, and the distance between them is designed to be adapted to the position of the roller table drives 61 and can just be arranged in the gaps between two adjacent groups of the roller table drives 61, which not only avoids spatial interference with them but also enables all the support beams 31 to be symmetrically arranged under the moving frame 12 to ensure the uniformity of the forces on the overall device during operation.

[0029] Furthermore, to achieve the structural lightweight and performance optimization of the support beam 31 and the moving frame 12, the present invention adopts a topology optimization method based on a mathematical algorithm. Combining the actual engineering requirements, a structure reduction design is carried out on the two. The topology optimization module in the OptiStruct topology optimization software is used to perform structural optimization based on the variable density method. This algorithm discretizes the design domain into finite element meshes, takes the element density as the design variable, and takes the maximization of the structural stiffness or the minimization of the mass as the goal, and iteratively solves for the optimal material distribution.

[0030] Define the core constraints: the total volume of the material is reduced by 20% - 30%, the maximum equivalent stress does not exceed 80% of the material yield strength, the displacement of the key nodes does not exceed the allowable value, and the minimum member size meets the manufacturing process requirements.

[0031] Further, static loads and dynamic loads are applied to the support beam 31. The static loads include the total weight of the moving frame 12, the upper header 21, and the coolant. The dynamic loads consider the inertial force during the lifting process of the screw jack 11 and the coolant impact force. The boundary condition is that the bottom of the support beam 31 is fixed, simulating a rigid connection with the ground. Concentrated loads and dynamic loads are applied to the moving frame 12. The concentrated loads include the vertical force at the installation point of the upper header 21, and the dynamic loads include the vibration loads during the lifting process. The boundary condition is that the connection between the moving frame 12 and the screw jack 11 is a hinged constraint.

[0032] Further, through automatic iterative calculations by software, materials in low-stress areas are gradually removed, and finally a topological optimization structure mainly in the shape of a skeleton or a truss is generated to ensure the efficient distribution of materials along the principal stress direction. Compared with the traditional I-beam, the optimized support beam 31 reduces the material consumption by 25% - 30%, reduces the mass of a single support beam, has a more uniform distribution of stress concentration areas, reduces the manufacturing cost at the same time, and the weight of the replacement parts during maintenance is reduced, further saving labor and transportation costs.

[0033] Further, the screw jack 11 is equipped with guiding members, such as guiding columns 111 and guiding sleeves 112, to limit the unexpected deviation of the moving trajectory when the position of the moving frame 12 changes, ensure the stability of the structure during the lifting process, and prevent lateral swing. As Figure 1 and Figure 6 shown, the guiding members include guiding columns 111 and guiding sleeves 112. The guiding columns 111 are connected to the support beam 31, and the guiding sleeves 112 are connected to the moving frame 12. When the position of the moving frame 12 changes, the guiding sleeves 112 move simultaneously. The guiding columns 111 provide additional support and stability for the moving frame 12 connected thereto by restricting the spatial position of the guiding sleeves 112, and then guide the moving trajectory of the upper header 21 to be a linear motion in the vertical direction, effectively restricting its unreasonable movement in the horizontal direction. In addition, as Figure 6 shown, the guiding members further include positioning pins 113 to ensure the position accuracy of the guiding sleeves 112 during installation.

[0034] Further, when hot-rolling products such as cooling strip steel, traditional cooling devices usually have more than 10 groups of headers and are uniformly controlled, which results in low regulation accuracy and cannot flexibly meet the increasingly diverse cooling process requirements.

[0035] Therefore, the present invention also provides a control method for the cooling device based on the above embodiments. After unitizing the cooling device and then refining it, the number of headers of a single unit-type cooling mechanism is set to 5 - 8 groups to improve the hit rate of the whole-process online cooling process. As Figure 1 and Figure 2As shown, the number of upper headers 21 is 6 groups, and each group is equipped with an independent water inlet pipeline 23. The control system 5 has a production optimization model built-in and is equipped with a parameter acquisition and feedback module, and there is an efficient signal interaction and feedback control mechanism with the cooling roller table 6. When the cooling device of the embodiment cooperates with the cooling roller table 6 to cool the hot-rolled product, the control system 5 can adjust the height, cooling mode, controlled cooling method, opening and closing of each group of headers, and flow rate of the upper headers 21 in each unit type cooling mechanism in real time, dynamically and independently, so that the hot-rolled product is always in an ideal cooling state during the continuous transmission process, and control the roller table speed and feedback the real-time position of the product. On the one hand, this refined control method utilizes the unit type characteristics. By reducing the number of groups of upper headers 21 and the independent power and transmission systems of each unit, it can quickly adapt to the changes in the cooling process requirements of different hot-rolled product types and achieve more accurate local on-line cooling intensity adjustment; on the other hand, it also makes full use of the characteristics of the cooling device of the present invention in stabilizing the position and reducing the structure. Although the number of unit type cooling mechanisms increases after refined control, the amount of basic steel structure used and the production cost are effectively controlled, achieving the goals of efficient utilization of resources and energy conservation and emission reduction.

[0036] As Figure 7 shown, the present invention also provides a control method for an on-line cooling device with a post-rolling position-stabilizing and structure-reducing type, including: S1. Real-time collect the position, transmission speed, temperature distribution, specification parameters and pre-sequence cooling process parameters of the hot-rolled product; S2. Based on the preset production optimization model, determine the target cooling process parameters of each unit type cooling mechanism according to the parameters in S1. The target cooling process parameters include: the height of the upper header 21, the selection of cooling mode and controlled cooling method, the flow rate distribution and opening and closing time sequence of each group of headers; S3. Dynamically adjust the vertical height and cooling mode of the upper header 21 in each unit type cooling mechanism through the control system 5, and independently control the controlled cooling method and flow rate of each group of upper headers 21, so that the hot-rolled product realizes sectional differential cooling during the continuous transmission process; Among them, the cooling mode includes the switching of conventional cooling, accelerated cooling and ultra-fast cooling, and the cooling modes of different unit type cooling mechanisms can be independently configured; the controlled cooling method includes the switching of air cooling, laminar flow cooling and jet cooling, and the controlled cooling methods of each group of upper headers 21 can be independently configured.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A post-rolling stable position reduction type online cooling device, characterized in that: include: N unit cooling mechanisms arranged continuously or at intervals along the moving direction of the cooling roller, N ≥ 1; Each of the unit cooling mechanisms comprises: A lifting assembly (1) comprises a spiral lift (11) and a movable frame (12) connected thereto, wherein the spiral lift (11) is fixed to the upper part of a support beam (31), and an upper header (21) is installed and carried on the lower part of the movable frame (12); A cooling assembly (2), comprising an upper header (21) and a lower header (22), wherein the upper header (21) is connected to a cooling medium supply system via a water inlet pipeline (23); A support assembly (3) comprising a support beam (31) with an I-shaped cross-section, wherein the support beam (31) is symmetrically distributed at the bottom of the cooling device and fixed to the ground; The control system (5) is configured to independently regulate the height, flow rate and cooling mode of the upper header (21) in each unit cooling mechanism.

2. The post-rolling stable position reducing type online cooling device according to claim 1 is characterized in that: The movable frame (12) is a grid-type steel structure, the internal hollow area of ​​which accommodates the spiral elevator (11), and the grid size is adapted to the installation layout of the upper header (21), ensuring that the upper header (21) is subjected to uniform support force.

3. The post-rolling stable position reducing type online cooling device according to claim 1 is characterized in that: The number of the support beams (31) is 4 groups, and the height H Z Minimum distance H between the upper header (21) and the hot-rolled product min The adjustable height H of the spiral elevator (11) satisfies H=H max −H min , where H max is the maximum adjustment distance.

4. The post-rolling stabilization and structure reduction type online cooling device according to claim 1 is characterized in that: The support beam (31) has a split structure on the side close to the cooling roller drive (61), and is divided into three parts: upper, middle and lower parts in the vertical direction: The upper part and the middle part are each a single small support beam (311); The lower part includes two small support beams (311) arranged in the gap between adjacent roller drives (61); The small support beam (311) in the middle is widened in the horizontal direction to connect the upper and lower parts.

5. The post-rolling stabilization and structure reduction type online cooling device according to claim 1 is characterized in that: The spiral elevator (11) is provided with a guide member, comprising a guide column (111) fixed to a support beam (31) and a guide sleeve (112) fixed to a movable frame (12); the guide sleeve (112) slides along the guide column (111) to limit the lifting trajectory of the movable frame (12) to vertical linear motion.

6. The post-rolling stabilization and structure reduction type online cooling device according to claim 5 is characterized in that: The guide component also includes a positioning pin (113) for ensuring the installation position accuracy of the guide sleeve (112) and the guide column (111).

7. The post-rolling stabilization and structure reduction type online cooling device according to claim 1 is characterized in that: It also includes a driving assembly (4), including a lifting motor (41), a commutator (42) and a connecting line (43), wherein the lifting motor (41) and the commutator (42) are installed on the upper part of the movable frame (12), and drive the movable frame (12) to vertically lift through the spiral lifter (11).

8. The post-rolling stable position reducing type online cooling device according to claim 1 is characterized in that: The support beam (31) and the mobile frame (12) are topologically optimized based on a mathematical algorithm, and the optimization parameters include material properties, load distribution, space restrictions and economic costs, so as to form a lightweight support structure.

9. The post-rolling stable position reducing type online cooling device according to claim 1 is characterized in that: The number of the upper headers (21) in a single unit cooling mechanism is 5 to 8 groups, and each group of upper headers (21) is equipped with an independent valve group, the opening and closing and flow of which are independently regulated by the control system (5).

10. A control method for the cooling device according to any one of claims 1 to 9, characterized in that: include: S1. Real-time collection of the position, transmission speed, temperature distribution, specification parameters and preceding cooling process parameters of hot-rolled products; S2, based on a preset production optimization model, determining target cooling process parameters of each unit cooling mechanism according to the parameters in S1, the target cooling process parameters including: the height of the upper header (21), the cooling mode and cooling control method selection, the flow distribution of each group of headers and the opening and closing timing; S3, dynamically adjusting the vertical height and cooling mode of the upper headers (21) in each unit cooling mechanism through the control system (5), and independently controlling the cooling control mode and flow rate of each group of upper headers (21), so that the hot-rolled products can be cooled in sections during continuous transmission; The cooling mode includes switching among conventional cooling, accelerated cooling and ultra-fast cooling, and the cooling modes of different unit cooling mechanisms can be configured independently; the cooling control method includes switching among air cooling, laminar cooling and jet cooling, and the cooling control method of each group of upper headers (21) can be configured independently.

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