Control method and control system of annealing temperature control system

Abstract

The invention discloses a control method and a control system of an annealing temperature control system. The method comprises the steps that a plurality of temperature control areas are arranged in the movement direction of the annealing structural part; the annealing structural part continuously moves in the annealing temperature control system at a constant speed, so that the annealing structural part is subjected to annealing treatment in the moving process; s3, acquiring a displacement position of the annealing structural member in the annealing temperature control system, wherein the displacement position is a distance parameter of the front end of the annealing structural member relative to an equipment inlet of the annealing temperature control system; and S5, dynamically calculating a target temperature set value of each temperature control area based on the displacement position and a preset annealing temperature distribution curve, the target temperature set value being a temperature control area index, and controlling a heating or cooling unit of each temperature control area to a specified value according to the target temperature set value. The problem of temperature control in the continuous annealing process of the large steel structure is solved, and the consistency of annealing quality and the reliability of the process are ensured.

Description

Technical Field

[0001] This invention relates to the field of automation control technology, specifically to a control method and control system for an annealing temperature control system. Background Technology

[0002] In the manufacturing process of large steel structures, annealing is a key process for eliminating residual stress generated during welding and forming, and improving the microstructure of the material. Traditional annealing processes typically employ static furnace treatment, where the annealed structural components are placed in a fixed furnace chamber and the annealing process is completed through prolonged heating, holding, and slow cooling. However, for ultra-large steel structures, static annealing suffers from drawbacks such as high equipment investment, high energy consumption, and long processing cycles, making it difficult to meet the demands of modern industrial production for high efficiency and energy conservation.

[0003] In reality, as annealed structural components move within the equipment, the temperature environment at different parts of the component constantly changes, and due to the component's geometry, thermal convection conditions are spatially non-uniformly distributed. This dynamic change renders traditional fixed-parameter temperature control strategies inadequate for the annealing process requirements, frequently resulting in localized overheating or underheating. For example, at abrupt structural joints, the thermal convection effect is significantly enhanced due to the small local radius of curvature, and existing technologies have failed to specifically compensate for this characteristic. Furthermore, the movement speed of the annealed structural component has a significant impact on the thermal convection process; speed variations lead to non-linear changes in the heat transfer coefficient, but existing technologies lack a dynamic adjustment mechanism for this speed factor.

[0004] Therefore, there is an urgent need for a continuous temperature control system that can sense the position, geometric features, and motion state of annealed structural components in real time and dynamically adjust the temperature control parameters accordingly, in order to solve the temperature control problem in the continuous annealing process of large steel structures and ensure the consistency of annealing quality and the reliability of the process. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a control method and control system for an annealing temperature control system, thereby solving the temperature control problem in the continuous annealing process of large steel structures and ensuring the consistency of annealing quality and the reliability of the process.

[0006] A first aspect of the present invention provides a control method for an annealing temperature control system, comprising the following steps: S1. Multiple temperature control zones are continuously arranged along the movement direction of the annealed structural component, and each temperature control zone is independently equipped with a heating or cooling unit. S2. To make the annealed structural component move continuously at a constant speed in the annealing temperature control system so that the annealed structural component can be annealed during the movement; S3. Obtain the displacement position of the annealed structural component in the annealing temperature control system. The displacement position The distance parameter between the front end of the annealed structural component and the inlet of the annealing temperature control system equipment; S4, Based on the displacement position and the preset annealing temperature distribution curve Dynamically calculate the target temperature setpoint for each temperature control zone. ,in For the temperature control zone index, the dynamic calculation considers the influence of changes in the thermal convection space at different structural positions of the annealed structural component on temperature control; S5. Based on the target temperature set value Control the heating or cooling units in each temperature control zone to the specified value.

[0007] As a preferred embodiment, the different structural positions of the annealed structural member include the front end position. Central position and backend location ; in, , , ; The change in the thermal convection space is expressed by the thermal convection space change index. Quantifying the dynamic impact of spatial variations in thermal convection on temperature control: ; in, Displacement position The heat transfer coefficient at that location; The speed of movement of the annealed structural components; This represents the rate of change of the heat transfer coefficient with respect to displacement position.

[0008] As a preferred embodiment, the heat transfer coefficient The calculation includes the following steps: In the annealing temperature control system, multiple heat flux sensors and airflow sensors are arranged along the movement direction of the annealing structure to acquire the ambient temperature at the displacement location in real time. and the surface temperature of annealed structural parts ; Calculate heat transfer efficiency based on sensor data. : ; in, To preset the annealing temperature distribution curve at position Theoretical value; Heat transfer efficiency Convert to heat transfer coefficient The relation is: , in, The calibration constant for the equipment is determined through the initial thermal calibration of the annealing temperature control system.

[0009] As a preferred method, the target temperature setpoint is dynamically calculated. At that time, based on the spatial variation index of thermal convection The compensation adjustment includes the following steps: when When the change in thermal convection space exceeds the preset value, the adjustment range of the target temperature setpoint is increased. ,in: ; in, This is the proportionality coefficient; The preset threshold; The adjusted target temperature setting is: .

[0010] As a preferred method, the temperature boundary condition determination specifically involves calculating the temperature gradient parameters at different structural locations of the annealed component. ,in: ; and These are the actual temperatures at the front and rear positions, respectively. when At that time, adjust the target temperature setting value of the previous temperature control zone to reduce the temperature gradient.

[0011] As a preferred method, adjusting the target temperature setpoint of the previous temperature control zone includes the following steps: Establish a temperature gradient feedback model, where the adjustment amount With temperature gradient parameters Proportional: ; in, For feedback gain coefficient, Use the reference temperature gradient; Adjustment amount Applying this to the previous temperature control zone, the target temperature setpoint is corrected to: , To suppress boundary temperature anomalies caused by changes in displacement position.

[0012] As a preferred method, the preset annealing temperature distribution curve The model is generated by training a neural network using historical annealing data, and the model input includes displacement position. annealed structural component geometric parameters and real-time thermal convection spatial variation index The output is the optimized version. This allows for adaptive compensation of spatial variations in thermal convection caused by continuous locations.

[0013] As a preferred embodiment, the heat transfer coefficient The calculation also includes the following steps: The influence of the geometry of the annealed structural component on geometric protrusion locations is obtained. These geometric protrusion locations are the joints where the structure changes abruptly, including corners, welds, or areas where the cross-section changes abruptly. Define the geometric prominence index ; in Displacement position The local radius of curvature at that point, and when It was determined to be a geometrically protruding position. The preset radius of curvature threshold is used; Heat transfer coefficient at geometric protrusions Represented as: ； in: The baseline heat transfer coefficient constant represents the basic heat transfer capacity without geometric influence; denoted as the velocity of the annealed structural component; m is the velocity exponent, representing the nonlinear effect of velocity on thermal convection. The geometric influence coefficient characterizes the enhancing effect of geometrically prominent locations on heat transfer, and ; The , and The initial thermal calibration of the annealing equipment was determined, and the calibration process included measuring heat flow data at geometrically protruding locations under static and dynamic conditions and fitting parameters. When the annealed structural component moves to its geometrically protruding position, the thermal convection space change index... Further revised to: ， The dynamic changes in thermal convection under the coupling effect of abrupt changes in quantified geometry and motion velocity.

[0014] A second aspect of the present invention provides a control system for an annealing temperature control system, comprising: The annealing equipment has multiple spaced temperature control zones along the movement direction of the annealing structure, and each temperature control zone is equipped with an independent heating unit, cooling unit and temperature sensor; The displacement monitoring module is used to acquire the displacement position of the annealed structural components in the equipment in real time. The control module is electrically connected to the displacement monitoring module and each temperature control zone, and dynamically calculates and adjusts the target temperature setpoint based on the displacement position and the thermal convection spatial change index. The heat flow monitoring module integrates a heat flow sensor and an airflow sensor to collect ambient temperature and the surface temperature of annealed structural parts in order to calculate heat transfer efficiency and the thermal convection spatial variation index.

[0015] The beneficial effects of this invention are as follows: This invention provides a continuous temperature control system and method, solving the problem that traditional fixed-parameter control cannot adapt to changes in thermal conditions caused by the displacement of annealed structural components, thus ensuring the continuity and consistency of the annealing process. It innovatively proposes a thermal convection space variation index, scientifically quantifying the dynamic changes in thermal convection conditions during the movement of annealed structural components, providing an objective basis for temperature control, and enabling the system to promptly sense and respond to changes in the thermal environment.

[0016] This invention addresses the temperature differences in different parts of annealed structural components by designing a temperature gradient parameter monitoring and feedback mechanism. When the temperature gradient exceeds a preset threshold, the system automatically adjusts the target temperature setpoint of the previous temperature control zone, effectively preventing stress concentration in the annealed structural components caused by uneven temperature and ensuring uniform stress distribution within the material after annealing. Special consideration is given to the thermal convection characteristics at abrupt structural joints. By quantifying the influence of geometry through a geometric prominence index, the system can accurately compensate for these critical locations, solving the problem of inaccurate control in areas of structural abrupt changes in traditional systems and avoiding overheating or underheating issues caused by enhanced thermal convection at these critical locations.

[0017] This invention explicitly considers the nonlinear influence of motion velocity on thermal convection, enabling the system to adjust the heat transfer coefficient model in real time according to changes in the motion velocity of the annealed structural component. When the annealed structural component passes through a geometrically protruding position at high speed, the system automatically increases the temperature compensation amplitude to ensure that the annealing quality is not affected by velocity fluctuations. A dynamic compensation mechanism based on the spatial variation index of thermal convection is established. When changes in thermal conditions exceed a preset threshold, the system automatically increases the adjustment amplitude of the target temperature setpoint, effectively coping with sudden changes in thermal conditions during annealing and improving the robustness and adaptability of the system.

[0018] Through a dynamic compensation mechanism, this invention effectively reduces quality problems such as deformation and cracking of annealed structural parts caused by improper temperature control, significantly reduces rework and scrap rates, and has significant economic benefits.

[0019] In summary, this invention solves key technical challenges in the continuous annealing process of large steel structures through innovative dynamic temperature control methods and system design, achieving a comprehensive improvement in annealing quality, production efficiency, and energy utilization, and has significant industrial application value and market prospects. Attached Figure Description

[0020] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0021] Figure 1 This is a structural block diagram of the system according to Embodiment 1 of the present invention. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] A first aspect of this disclosure provides a control method for an annealing temperature control system, comprising the following steps: S1. Multiple temperature control zones are continuously arranged along the movement direction of the annealed structural component, and each temperature control zone is independently equipped with a heating or cooling unit. S2. To make the annealed structural component move continuously at a constant speed in the annealing temperature control system so that the annealed structural component can be annealed during the movement; S3. Obtain the displacement position of the annealed structural component in the annealing temperature control system. The displacement position The distance parameter between the front end of the annealed structural component and the inlet of the annealing temperature control system equipment; S4, Based on the displacement position and the preset annealing temperature distribution curve Dynamically calculate the target temperature setpoint for each temperature control zone. ,in For the temperature control zone index, the dynamic calculation considers the influence of changes in the thermal convection space at different structural positions of the annealed structural component on temperature control; S5. Based on the target temperature set value Control the heating or cooling units in each temperature control zone to the specified value.

[0024] As a preferred embodiment, the different structural positions of the annealed structural member include the front end position. Central position and backend location ; in, , , ; The change in the thermal convection space is expressed by the thermal convection space change index. Quantifying the dynamic impact of spatial variations in thermal convection on temperature control: ; in, Displacement position The heat transfer coefficient at that location; The speed of movement of the annealed structural components; This represents the rate of change of the heat transfer coefficient with respect to displacement position.

[0025] As a preferred embodiment, the heat transfer coefficient The calculation includes the following steps: In the annealing temperature control system, multiple heat flux sensors and airflow sensors are arranged along the movement direction of the annealing structure to acquire the ambient temperature at the displacement location in real time. and the surface temperature of annealed structural parts ; Calculate heat transfer efficiency based on sensor data. : ; in, To preset the annealing temperature distribution curve at position Theoretical value; Heat transfer efficiency Convert to heat transfer coefficient The relation is: , in, The calibration constant for the equipment is determined through the initial thermal calibration of the annealing temperature control system.

[0026] As a preferred method, the target temperature setpoint is dynamically calculated. At that time, based on the spatial variation index of thermal convection The compensation adjustment includes the following steps: when When the change in thermal convection space exceeds the preset value, the adjustment range of the target temperature setpoint is increased. ,in: ; in, This is the proportionality coefficient; The preset threshold; The adjusted target temperature setting is: .

[0027] As a preferred method, the temperature boundary condition determination specifically involves calculating the temperature gradient parameters at different structural locations of the annealed component. ,in: ; and These are the actual temperatures at the front and rear positions, respectively. when At that time, adjust the target temperature setting value of the previous temperature control zone to reduce the temperature gradient.

[0028] As a preferred method, adjusting the target temperature setpoint of the previous temperature control zone includes the following steps: Establish a temperature gradient feedback model, where the adjustment amount With temperature gradient parameters Proportional: ; in, For feedback gain coefficient, Use the reference temperature gradient; Adjustment amount Applying this to the previous temperature control zone, the target temperature setpoint is corrected to: , To suppress boundary temperature anomalies caused by changes in displacement position.

[0029] As a preferred method, the preset annealing temperature distribution curve The model is generated by training a neural network using historical annealing data, and the model input includes displacement position. annealed structural component geometric parameters and real-time thermal convection spatial variation index The output is the optimized version. This allows for adaptive compensation of spatial variations in thermal convection caused by continuous locations.

[0030] As a preferred embodiment, the heat transfer coefficient The calculation also includes the following steps: The influence of the geometry of the annealed structural component on geometric protrusion locations is obtained. These geometric protrusion locations are the joints where the structure changes abruptly, including corners, welds, or areas where the cross-section changes abruptly. Define the geometric prominence index ; in Displacement position The local radius of curvature at that point, and when It was determined to be a geometrically protruding position. The preset radius of curvature threshold is used; Heat transfer coefficient at geometric protrusions Represented as: ； in: The baseline heat transfer coefficient constant represents the basic heat transfer capacity without geometric influence; denoted as the velocity of the annealed structural component; m is the velocity exponent, representing the nonlinear effect of velocity on thermal convection. The geometric influence coefficient characterizes the enhancing effect of geometrically prominent locations on heat transfer, and ; The , and The initial thermal calibration of the annealing equipment was determined, and the calibration process included measuring heat flow data at geometrically protruding locations under static and dynamic conditions and fitting parameters. When the annealed structural component moves to its geometrically protruding position, the thermal convection space change index... Further revised to: ， The dynamic changes in thermal convection under the coupling effect of abrupt changes in quantified geometry and motion velocity.

[0031] A second aspect of this disclosure provides a control system for an annealing temperature control system, such as... Figure 1 As shown, it includes: The annealing equipment has multiple spaced temperature control zones along the movement direction of the annealing structure, and each temperature control zone is equipped with an independent heating unit, cooling unit and temperature sensor; The displacement monitoring module is used to acquire the displacement position of the annealed structural components in the equipment in real time. The control module is electrically connected to the displacement monitoring module and each temperature control zone, and dynamically calculates and adjusts the target temperature setpoint based on the displacement position and the thermal convection spatial change index. The heat flow monitoring module integrates a heat flow sensor and an airflow sensor to collect ambient temperature and the surface temperature of annealed structural parts in order to calculate heat transfer efficiency and the thermal convection spatial variation index.

[0032] This embodiment of the invention addresses the temperature differences in different parts of an annealed structural component by designing a temperature gradient parameter monitoring and feedback mechanism. When the temperature gradient exceeds a preset threshold, the system automatically adjusts the target temperature setting of the previous temperature control zone, effectively preventing stress concentration in the annealed structural component due to uneven temperature and ensuring uniform stress distribution within the material after annealing. Special consideration is given to the thermal convection characteristics at abrupt structural joints. By quantifying the geometric influence through a geometric prominence index, the system can accurately compensate for these critical locations, solving the problem of inaccurate control in areas of structural abrupt changes in traditional systems and avoiding overheating or underheating at these critical locations due to enhanced thermal convection.

[0033] This disclosure explicitly considers the nonlinear effect of motion velocity on thermal convection, enabling the system to adjust the heat transfer coefficient model in real time according to changes in the motion velocity of the annealed structural component. When the annealed structural component passes through a geometrically protruding position at high speed, the system automatically increases the temperature compensation amplitude to ensure that the annealing quality is not affected by velocity fluctuations. A dynamic compensation mechanism based on the spatial variation index of thermal convection is established. When changes in thermal conditions exceed a preset threshold, the system automatically increases the adjustment amplitude of the target temperature setpoint, effectively coping with sudden changes in thermal conditions during annealing and improving the robustness and adaptability of the system.

[0034] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented using electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods for each specific application to achieve the described functions, but such implementation should not be considered beyond the scope of the embodiments of this disclosure. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the described devices, apparatuses, and units can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0035] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, function, and operation of possible implementations of apparatus, methods, and computer program products according to embodiments of the present disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than those disclosed in the description; sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. Each block in a block diagram and / or flowchart, and combinations of blocks in a block diagram and / or flowchart, can be implemented using a dedicated hardware-based device that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

Claims

1. A control method for an annealing temperature control system, characterized in that, Includes the following steps: S1. Multiple temperature control zones are continuously arranged along the movement direction of the annealed structural component, and each temperature control zone is independently equipped with a heating or cooling unit. S2. To make the annealed structural component move continuously at a constant speed in the annealing temperature control system so that the annealed structural component can be annealed during the movement; S3. Obtain the displacement position of the annealed structural component in the annealing temperature control system. The displacement position The distance parameter between the front end of the annealed structural component and the inlet of the annealing temperature control system equipment; S4, Based on the displacement position and the preset annealing temperature distribution curve Dynamically calculate the target temperature setpoint for each temperature control zone. ,in For the temperature control zone index, the dynamic calculation considers the influence of changes in the thermal convection space at different structural positions of the annealed structural component on temperature control; S5. Based on the target temperature set value Control the heating or cooling units in each temperature control zone to the specified value.

2. The control method for the annealing temperature control system according to claim 1, characterized in that, The different structural positions of the annealed structural component include the front end position. Central position and backend location ; in, , , ; The change in the thermal convection space is expressed by the thermal convection space change index. Quantifying the dynamic impact of spatial variations in thermal convection on temperature control: ； in, Displacement position The heat transfer coefficient at that location; The speed of movement of the annealed structural components; This represents the rate of change of the heat transfer coefficient with respect to displacement position.

3. The control method for the annealing temperature control system according to claim 1, characterized in that, The heat transfer coefficient The calculation includes the following steps: In the annealing temperature control system, multiple heat flux sensors and airflow sensors are arranged along the movement direction of the annealing structure to acquire the ambient temperature at the displacement location in real time. and the surface temperature of annealed structural parts ; Calculate heat transfer efficiency based on sensor data. : ； in, To preset the annealing temperature distribution curve at position Theoretical value; Heat transfer efficiency Convert to heat transfer coefficient The relation is: ， in, The calibration constant for the equipment is determined through the initial thermal calibration of the annealing temperature control system.

4. The control method for the annealing temperature control system according to claim 1, characterized in that, Dynamically calculate the target temperature setpoint At that time, based on the spatial variation index of thermal convection The compensation adjustment includes the following steps: when When the change in thermal convection space exceeds the preset value, the adjustment range of the target temperature setpoint is increased. ,in: ； in, This is the proportionality coefficient; The preset threshold; The adjusted target temperature setting is: 。 5. The control method for the annealing temperature control system according to claim 1, characterized in that, The temperature boundary condition determination specifically involves calculating the temperature gradient parameters at different structural locations of the annealed component. ,in: ; and These are the actual temperatures at the front and rear positions, respectively. when At that time, adjust the target temperature setting value of the previous temperature control zone to reduce the temperature gradient.

6. The control method for the annealing temperature control system according to claim 5, characterized in that, The process of adjusting the target temperature setpoint of the previous temperature control zone includes the following steps: Establish a temperature gradient feedback model, where the adjustment amount With temperature gradient parameters Proportional: ； in, For feedback gain coefficient, Use the reference temperature gradient; Adjustment amount Applying this to the previous temperature control zone, the target temperature setpoint is corrected to: ， To suppress boundary temperature anomalies caused by changes in displacement position.

7. The control method for the annealing temperature control system according to claim 1, characterized in that, The preset annealing temperature distribution curve The model is generated by training a neural network using historical annealing data, and the model input includes displacement position. annealed structural component geometric parameters and real-time thermal convection spatial variation index The output is the optimized version. This allows for adaptive compensation of spatial variations in thermal convection caused by continuous locations.

8. The control method for the annealing temperature control system according to claim 3, characterized in that, The heat transfer coefficient The calculation also includes the following steps: The influence of the geometry of the annealed structural component on geometric protrusion locations is obtained. These geometric protrusion locations are the joints where the structure changes abruptly, including corners, welds, or areas where the cross-section changes abruptly. Define the geometric prominence index ; in Displacement position The local radius of curvature at that point, and when It was determined to be a geometrically protruding position. The preset radius of curvature threshold is used; Heat transfer coefficient at geometric protrusions Represented as: ； in: The baseline heat transfer coefficient constant represents the basic heat transfer capacity without geometric influence; denoted as the velocity of the annealed structural component; m is the velocity exponent, representing the nonlinear effect of velocity on thermal convection. The geometric influence coefficient characterizes the enhancing effect of geometrically prominent locations on heat transfer, and ; The , and The initial thermal calibration of the annealing equipment was determined, and the calibration process included measuring heat flow data at geometrically protruding locations under static and dynamic conditions and fitting parameters. When the annealed structural component moves to its geometrically protruding position, the thermal convection space change index... Further revised to: ， The dynamic changes in thermal convection under the coupling effect of abrupt changes in quantified geometry and motion velocity.

9. The control system of the annealing temperature control system, characterized in that, include: The annealing equipment has multiple spaced temperature control zones along the movement direction of the annealing structure, and each temperature control zone is equipped with an independent heating unit, cooling unit and temperature sensor; The displacement monitoring module is used to acquire the displacement position of the annealed structural components in the equipment in real time. The control module is electrically connected to the displacement monitoring module and each temperature control zone, and dynamically calculates and adjusts the target temperature setpoint based on the displacement position and the thermal convection spatial change index. The heat flow monitoring module integrates a heat flow sensor and an airflow sensor to collect ambient temperature and the surface temperature of annealed structural parts in order to calculate heat transfer efficiency and the thermal convection spatial variation index.

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