Control methods, devices, equipment and media for strip temperature control systems

Abstract

This application discloses a control method, device, equipment, and medium for a strip steel temperature control system, belonging to the field of metallurgical technology. The method includes: acquiring the actual running speed, actual temperature, and target temperature of the strip steel; if a heating command is received, determining the heating current of the heating module based on the actual running speed, actual temperature, and target temperature; controlling the start of the fan and the heating module, and controlling the heating module to operate with the heating current to heat the strip steel with hot air discharged through the air outlet. This method heats the strip steel by blowing hot air onto it, increasing the edge temperature of the strip steel. The heating method is very gentle, does not affect the performance of the strip steel, and is applicable to strip steel of any grade.

Description

Technical Field

[0001] This application relates to the field of metallurgical technology, and in particular to a control method, device, equipment and medium for a strip steel temperature control system. Background Technology

[0002] When strip steel undergoes edge trimming, edge cracks can occur due to the low temperature at the edges, affecting the quality of the strip steel. Therefore, to improve the quality of the strip steel and reduce the probability of edge cracking, the edges of the strip steel need to be heated before the edge trimming operation.

[0003] In existing technologies, the edges of steel strips are induction heated using electromagnetic induction heaters. While electromagnetic induction heating offers rapid heating, it can affect the electromagnetic properties of special steel grades and is also costly, thus limiting its applicability. Summary of the Invention

[0004] In view of the above problems, this application is made to provide a control method, device, equipment and medium for a strip steel temperature control system that solves the above problems. The strip steel can be heated by blowing hot air onto it to increase the edge temperature of the strip steel. The heating method is very gentle and will not affect the performance of the strip steel. It is applicable to strip steel of any steel grade.

[0005] In a first aspect, this application provides a control method for a strip steel temperature control system. The heating system includes a fan and an exhaust duct with an inner cavity. The air outlet of the fan communicates with the inner cavity of the exhaust duct. A heating module is provided inside the fan. An air outlet communicating with the inner cavity is opened on the exhaust duct. The method includes:

[0006] Obtain the actual running speed, actual temperature, and target temperature of the strip steel;

[0007] If a heating command is received, the heating current of the heating module is determined based on the actual operating speed, the actual temperature, and the target temperature.

[0008] The fan and the heating module are started, and the heating module is operated with the heating current to heat the strip steel with hot air discharged through the air outlet.

[0009] Optionally, determining the heating current of the heating module based on the actual operating speed, the actual temperature, and the target temperature includes:

[0010] Obtain the maximum current of the heating module and the maximum operating speed of the strip steel;

[0011] Calculate the first ratio of the actual operating speed to the maximum limited operating speed;

[0012] Calculate the second ratio of the actual temperature to the target temperature;

[0013] The heating current of the heating module is determined based on the maximum current, the first ratio, and the second ratio.

[0014] Optionally, determining the heating current of the heating module based on the maximum current, the first ratio, and the second ratio includes:

[0015] Obtain a preset temperature control coefficient, wherein the temperature control coefficient is greater than 0 and less than 1;

[0016] Calculate the second power of the ratio of the temperature regulation coefficient to obtain the target value;

[0017] The heating current of the heating module is determined by multiplying the maximum current, the target value, and the first ratio.

[0018] Optionally, after obtaining the actual operating speed, actual temperature, and target temperature of the strip steel, the method further includes:

[0019] If a cooling command is received, the target air volume of the fan is determined based on the actual operating speed, the actual temperature, and the target temperature.

[0020] Start the fan and turn off the heating module, and control the fan's airflow to the target airflow so that the cold air discharged through the air outlet can cool the strip steel.

[0021] Optionally, the exhaust trough has a U-shaped cross-section, and the inner surfaces of the two side walls of the exhaust trough are provided with a plurality of air outlets communicating with the inner cavity. The outer surface of the bottom wall of the exhaust trough is provided with an air inlet communicating with the inner cavity. The air inlet is connected to the air outlet of the fan. The inner side of the exhaust trough is used to accommodate the edge of the strip steel.

[0022] Optionally, the bottom wall of the exhaust duct is provided with a protrusion for dividing the airflow. The bottom surface of the protrusion coincides with the inner surface of the bottom wall. The protrusion extends toward the air inlet. The distance between the apex of the protrusion and the air inlet is less than a preset distance threshold.

[0023] Optionally, the cross-section of the protrusion is triangular.

[0024] Secondly, this application provides a control device for a strip steel temperature control system. The heating system includes a fan and an exhaust duct with an inner cavity. The air outlet of the fan communicates with the inner cavity of the exhaust duct. A heating module is provided inside the fan. An air outlet communicating with the inner cavity is provided on the exhaust duct. The device includes:

[0025] The acquisition module is used to acquire the actual running speed, actual temperature, and target temperature of the strip steel.

[0026] The first determining module is used to determine the heating current of the heating module based on the actual operating speed, the actual temperature, and the target temperature if a heating command is received.

[0027] The control module is used to control the start-up of the fan and the heating module, and to control the heating module to operate with the heating current so as to heat the strip steel with hot air discharged through the air outlet.

[0028] Thirdly, this application provides an electronic device, including: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the computer instructions to perform the method as described in the first aspect.

[0029] Fourthly, this application provides a computer-readable storage medium storing computer instructions for causing the computer to perform the method described in the first aspect.

[0030] The technical solutions provided in this application embodiment have at least the following technical effects or advantages:

[0031] This application provides a control method, apparatus, equipment, and medium for a strip steel temperature control system. It can acquire the actual operating speed, actual temperature, and target temperature of the strip steel. Upon receiving a heating command, it determines the heating current of the heating module based on the actual operating speed, actual temperature, and target temperature. When the strip steel needs heating, it determines the heating current of the heating module based on three parameters affecting the heating intensity; the magnitude of the heating current directly affects the heating intensity. It controls the start of the fan and heating module, and controls the heating module to operate with the heating current, ensuring that the hot air discharged from the air outlet is sufficiently strong to heat the strip steel to the target temperature. This method heats the strip steel by blowing hot air onto it, increasing the edge temperature of the strip steel. The heating method is very gentle, does not affect the performance of the strip steel, and is applicable to strip steel of any grade.

[0032] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0033] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0034] Figure 1 This is a schematic diagram of a temperature control system provided in an embodiment of this application;

[0035] Figure 2 This is a flowchart of a control method for a strip temperature control system provided in an embodiment of this application;

[0036] Figure 3 This is a schematic diagram of the structure of an exhaust duct provided in an embodiment of this application;

[0037] Figure 4 This is a cross-sectional schematic diagram of an exhaust duct provided in an embodiment of this application;

[0038] Figure 5 This is a structural block diagram of a control device for a strip steel temperature control system provided in an embodiment of this application. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings. It should be understood that the embodiments of this disclosure and the specific features in the embodiments are detailed descriptions of the technical solutions of this application, rather than limitations on the technical solutions of this application. Unless otherwise specified, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0040] Before providing a detailed description of the control method for a strip temperature control system provided in this application embodiment, a brief introduction to the implementation environment of the design is given first.

[0041] Figure 1 This is a schematic diagram of a temperature control system provided in an embodiment of this application, as shown below. Figure 1 As shown, the temperature control system includes a fan 1 and an exhaust duct 2 with an inner cavity. The air outlet of the fan 1 is connected to the inner cavity of the exhaust duct 2. A heating module (not shown in the figure) is installed inside the fan 1, and an air outlet is opened on the exhaust duct 2 that communicates with the inner cavity. The air generated by the fan 1 enters the inner cavity of the exhaust duct 2, and the air in the inner cavity is discharged from the air outlet. The heating module is used to heat the air generated by the fan 1.

[0042] In the embodiment of the application, the temperature control system may further include an air duct 3, one end of which is connected to the air outlet of the fan 1, and the other end of which is connected to the inner cavity of the exhaust duct 2. The air duct 3 can be securely connected to the exhaust duct 2 and the fan 1 by bolts using clamps 4. Its material is flexible, high-temperature resistant (above 100℃), and has good thermal insulation properties. When arranging the temperature control system, the air outlet can be positioned facing the edge of the strip 5 so that the air discharged from the outlet blows precisely onto the edge of the strip.

[0043] In the embodiment of the application, the temperature control system also includes a non-contact temperature measuring instrument, a PLC controller (Programmable Logic Controller), and a display control terminal. The PLC controller is electrically connected to both the non-contact temperature measuring instrument and the display control terminal. The non-contact temperature measuring instrument is used to measure the temperature of the strip steel. It features high accuracy and the ability to measure the temperature of objects with bright surfaces. It can be installed on the exhaust duct 2, 15mm from the edge of the strip steel, and converts the temperature value into a voltage or current signal, which is then fed back to the PLC controller. The PLC controller is used to run the temperature control program. The display control terminal is used to display the temperature of the strip steel, etc., and to read data and perform logic control on the PLC controller through a certain communication protocol. The communication protocol is not limited to Modbus RTU or Modbus TCP. The display control terminal can select whether the fan 1 is in manual or automatic control mode. In automatic control mode, the user needs to set the target temperature, and the temperature control system will adjust the strip steel temperature to the target temperature.

[0044] For example, the display control terminal is Kunlun Tongtai display screen, the PLC controller is Siemens, the non-contact temperature measuring instrument is Impack temperature sensor, the maximum power of fan 1 is 10kW, and the temperature is transmitted to the PLC controller through an analog signal of 4-20mA.

[0045] Figure 2 This is a flowchart of a control method for a strip steel temperature control system provided in an embodiment of this application, such as... Figure 2 As shown, the method includes:

[0046] Step S110: Obtain the actual running speed, actual temperature and target temperature of the strip steel.

[0047] In this embodiment, the temperature control system can achieve edge temperature control of strip steel in a static state as well as edge temperature control of strip steel in a moving state. If the strip steel is in motion, the actual running speed of the strip steel needs to be obtained. The target temperature is the temperature set by the user in the temperature control system, and the actual temperature is the temperature of the strip steel detected by a non-contact temperature measuring instrument.

[0048] Step S120: If a heating command is received, determine the heating current of the heating module based on the actual operating speed, actual temperature, and target temperature.

[0049] In this embodiment, receiving a heating command indicates that the edge of the strip needs to be heated. The actual running speed of the strip determines the heating time, and the actual temperature reflects the heating effect. Therefore, the heating current of the heating module can be determined based on the actual running speed, actual temperature, and target temperature. The larger the heating current, the greater the heating power and the stronger the heating capacity of the heating module; therefore, the heating current directly affects the heating intensity of the strip.

[0050] Step S130: Control the start of the fan 1 and the heating module, and control the heating module to operate with heating current so as to heat the strip steel with hot air discharged through the air outlet.

[0051] In this embodiment, when the edge of the strip needs to be heated, both the blower 1 and the heating module are activated simultaneously. This ensures that the blower 1 ultimately blows out hot air, and the heating module is controlled to operate with a heating current, guaranteeing that the heating intensity of the hot air exiting the air outlet meets the requirements, allowing the edge of the strip to reach the target temperature. This method heats the strip by blowing hot air onto it, increasing the edge temperature. The heating method is very gentle, does not affect the strip's performance, and is applicable to strips of any steel grade.

[0052] Optionally, step S120 includes:

[0053] The first step is to obtain the maximum current of the heating module and the maximum operating speed of the strip.

[0054] In this embodiment, the maximum current of the heating module can be obtained from its design parameters. The maximum restricted operating speed of the strip can be obtained from the strip rolling system. The maximum restricted operating speed is the maximum speed at which the strip is allowed to run in the rolling system, meaning that the actual operating speed of the strip is less than or equal to the maximum restricted operating speed.

[0055] The second step is to calculate the first ratio between the actual operating speed and the maximum operating speed.

[0056] In the embodiments of this application, the faster the strip moves, the faster the airflow around the strip flows, and the more severe the heat loss of the strip. The first ratio of the actual operating speed to the maximum limited operating speed can characterize the severity of the heat loss of the strip.

[0057] The third step is to calculate the second ratio between the actual temperature and the target temperature.

[0058] In this application, the second ratio of the actual temperature to the target temperature characterizes the degree of difference between the actual temperature and the target temperature. The larger the second ratio, the closer the actual temperature is to the target temperature, and the more the current heating conditions meet the requirements.

[0059] Step 4: Determine the heating current of the heating module based on the maximum current, the first ratio, and the second ratio.

[0060] In this embodiment, the final heating current of the heating module is determined based on three influencing parameters: the maximum current, the first ratio, and the second ratio.

[0061] Optional, the fourth step includes:

[0062] Obtain the preset temperature control coefficient, which is greater than 0 and less than 1; calculate the second power of the temperature control coefficient to obtain the target value; determine the heating current of the heating module based on the product of the maximum current, the target value, and the first power.

[0063] In this embodiment, a temperature regulation coefficient α greater than 0 and less than 1 can be preset according to the actual site conditions, and then α is calculated. n The target value is obtained by taking the value of , which characterizes the influence of temperature on the heating current. 'n' represents the second ratio. The first ratio characterizes the influence of the strip running speed on the heating current. Finally, the maximum current I is calculated. max Target value α n The product of this and the first ratio m yields a value less than the maximum current I. max The current value is used to determine the heating current of the heating module.

[0064] Among them, the maximum current I can be max Target value α n The product of the first ratio m and the first ratio m is used as the heating current of the heating module, i.e., I = I max ×α n ×m.

[0065] For example, the target temperature of the strip edge is set to 40℃ using a display control terminal, the strip's running speed is 40m / min, and the ambient temperature is 15℃. A non-contact temperature measuring instrument measures the actual temperature of the strip edge in real time, which is 15℃. The PLC controller dynamically adjusts the heating current of the heating module based on the ratio of the actual temperature to the set temperature, thereby adjusting the strip edge temperature. For a 2mm thick strip running at 40m / min with a maximum speed of 100m / min, the core temperature can reach 40℃ within 3 seconds.

[0066] Based on the actual site conditions, the temperature regulation coefficient a for the 10KW fan 1 can be determined to be 4 / 5, therefore the heating current is:

[0067] Optionally, after step S110, the method further includes:

[0068] If a cooling command is received, the target air volume of fan 1 is determined based on the actual operating speed, actual temperature and target temperature; fan 1 is started and the heating module is turned off, and the air volume of fan 1 is controlled to the target air volume so that the cold air discharged through the air outlet cools the strip steel.

[0069] In this embodiment, if a cooling command is received, it indicates that the strip temperature is too high and cooling is required. At this time, the target air volume of fan 1 can be determined based on three parameters that affect the cooling intensity: actual operating speed, actual temperature, and target temperature. The larger the target air volume, the greater the cooling intensity on the edge of the strip and the faster the cooling speed.

[0070] Next, start fan 1, but turn off the heating module so that cold air is discharged from the air outlet. Then, control the airflow of fan 1 to the target airflow so that fan 1 can cool the strip steel to the target temperature. The temperature control system uses a PID (Proportional-Integral-Derivative) control algorithm to dynamically adjust the current of the heating module based on the difference between the actual temperature and the target temperature.

[0071] Figure 3 This is a schematic diagram of the structure of an exhaust duct provided in an embodiment of this application, as shown below. Figure 3 As shown, the cross-section of the exhaust duct 2 is U-shaped. Multiple air outlets 22 communicating with the inner cavity are opened on the inner surface of the two side walls 21 of the exhaust duct 2. An air inlet communicating with the inner cavity is opened on the outer surface of the bottom wall 23 of the exhaust duct 2. The air inlet is connected to the air outlet of the fan 1. The inner side of the exhaust duct 2 is used to accommodate the edge of the strip steel.

[0072] In this embodiment, the exhaust duct 2 is U-shaped, so that the air discharged through the air outlet 22 on the inner surface of one side wall 21 can regulate the temperature of the upper surface of the edge of the strip steel, and the air discharged through the air outlet 22 on the inner surface of the other side wall 21 can regulate the temperature of the lower surface of the edge of the strip steel, thereby improving the temperature regulation efficiency.

[0073] This can be understood as follows: the air generated by the fan 1 enters the inner cavity from the bottom wall 23 of the exhaust duct 2, and the air in the inner cavity is discharged from the air outlet 22 of the side wall 21. The air discharged from the air outlet 22 blows towards the edge of the strip steel.

[0074] Figure 4 This is a cross-sectional schematic diagram of an exhaust duct provided in an embodiment of this application, as shown below. Figure 4As shown, the bottom wall 23 of the exhaust duct 2 is provided with a protrusion 24 for dividing the airflow. The bottom surface of the protrusion 24 coincides with the inner surface of the bottom wall 23. The protrusion 24 extends towards the air inlet A. The distance between the apex of the protrusion 24 and the air inlet A is less than a preset distance threshold.

[0075] In this embodiment, the protrusion 24 can divide the airflow entering from the air inlet A into two streams, which flow to the two side walls 21 of the exhaust duct 2 respectively. The protrusion 24 can also accelerate the airflow velocity, so that the air generated by the fan 1 can be better discharged from the air outlet 22. In order to ensure the effect of air diversion, the distance between the protrusion 24 and the air inlet A should not be too large.

[0076] Optionally, the cross-section of the protrusion 24 is triangular.

[0077] In the embodiments of this application, such as Figure 4 As shown, the protrusion 24 is a triangular body with a triangular cross-section, which is more conducive to the division of airflow and facilitates air flow.

[0078] In this embodiment, the size of the opening of the exhaust duct 2 is related to the thickness of the strip. To prevent the strip from colliding with the exhaust duct 2 due to plate defects and damaging it, the opening height d of the exhaust duct 2 is related to the strip thickness t as follows: d ≥ 3t. The opening depth of the exhaust duct 2 is positively correlated with the width of the edge of the strip that needs to be heated. To improve the quality of the strip edge, both sides of the strip need to be heated. A PLC controller is used to monitor and control the temperature of both sides of the edge, i.e., a fan 1 and an exhaust duct 2 are arranged on each side. To reduce the scraping between the strip and the inner surface of the bottom wall 23 of the exhaust duct 2, the edge needs to be 5-10mm away from the inner surface of the bottom wall 23 of the exhaust duct 2.

[0079] In the embodiments of this application, the strip steel moves at a speed between 40m / min and 100m / min on the production line. In order to ensure the temperature change of the core of the strip steel, the thickness of the strip steel is generally controlled below 3mm, so that the strip steel has a better temperature regulation effect.

[0080] Based on the same concept, embodiments of the present invention also provide a control device for a strip steel temperature control system. Figure 5 This is a structural block diagram of a control device for a strip steel temperature control system provided in an embodiment of this application, as shown below. Figure 5 As shown, the device 500 includes an acquisition module 501, a first determination module 502, and a control module 503.

[0081] The acquisition module 501 is used to acquire the actual running speed, actual temperature, and target temperature of the strip steel.

[0082] The first determining module 502 is used to determine the heating current of the heating module based on the actual operating speed, actual temperature and target temperature if a heating command is received.

[0083] The control module 503 is used to control the start of the fan and the heating module, and to control the heating module to operate with heating current so as to heat the strip steel with hot air discharged through the air outlet.

[0084] Optionally, the first determining module 502 includes:

[0085] The acquisition unit is used to acquire the maximum current of the heating module and the maximum operating speed of the strip.

[0086] The first calculation unit is used to calculate the first ratio between the actual operating speed and the maximum limited operating speed;

[0087] The second calculation unit is used to calculate the second ratio between the actual temperature and the target temperature;

[0088] The determining unit is used to determine the heating current of the heating module based on the maximum current, a first ratio, and a second ratio.

[0089] Optionally, the determining unit is also used for:

[0090] Obtain the preset temperature control coefficient, which is greater than 0 and less than 1;

[0091] Calculate the second power of the temperature regulation coefficient to obtain the target value;

[0092] The heating current of the heating module is determined by multiplying the maximum current, the target value, and the first ratio.

[0093] Optionally, the device 500 further includes a second determining module for:

[0094] If a cooling command is received, the target airflow of the fan is determined based on the actual operating speed, actual temperature, and target temperature.

[0095] Start the fan and turn off the heating module, and control the fan's airflow to the target airflow so that the cold air discharged through the air outlet can cool the steel strip.

[0096] Optionally, the exhaust duct has a U-shaped cross-section, and the inner surfaces of the two side walls of the exhaust duct are provided with multiple air outlets that communicate with the inner cavity. The outer surface of the bottom wall of the exhaust duct is provided with an air inlet that communicates with the inner cavity. The air inlet is connected to the air outlet of the fan. The inner side of the exhaust duct is used to accommodate the edge of the strip steel.

[0097] Optionally, the bottom wall of the exhaust duct is provided with a protrusion for dividing the airflow. The bottom surface of the protrusion coincides with the inner surface of the bottom wall. The protrusion extends towards the air inlet, and the distance between the apex of the protrusion and the air inlet is less than a preset distance threshold.

[0098] Optionally, the cross-section of the protrusion is triangular.

[0099] It is understood that the device provided in the above embodiments is only illustrated by the division of the above functional modules. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0100] This invention also provides an electronic device that may include a processor and a memory, wherein the processor and the memory may be interconnected via a bus or other means.

[0101] The processor can be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application. It can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or other chips, or combinations of the above types of chips.

[0102] Memory may include mass storage for data or instructions. For example, and not limitingly, memory may include hard disk drives (HDDs), floppy disk drives, flash memory, optical disks, magneto-optical disks, magnetic tape, or Universal Serial Bus (USB) drives, or combinations of two or more of these. Where appropriate, memory may include removable or non-removable (or fixed) media. Where appropriate, memory may be internal or external to an electronic device. In a particular embodiment, memory may be non-volatile solid-state memory.

[0103] In one instance, the memory may be read-only memory (ROM). In one instance, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or flash memory, or a combination of two or more of these.

[0104] The processor reads and executes computer program instructions stored in the memory to implement any of the strip temperature control methods in the above embodiments.

[0105] In one example, the electronic device may further include a communication interface and a bus. The processor, memory, and communication interface are connected via the bus to communicate with each other. The communication interface is primarily used to enable communication between the various modules, devices, units, and / or equipment in the embodiments of this application. Where appropriate, the bus may include one or more buses.

[0106] Furthermore, in conjunction with the control method of the strip temperature control system in the above embodiments, this invention can be implemented using a computer-readable storage medium. This computer-readable storage medium stores computer program instructions; when these computer program instructions are executed by a processor, they implement any of the control methods of the strip temperature control system in the above embodiments.

[0107] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. The storage medium can be read-only memory (ROM), random access memory (RAM), flash memory, hard disk drive (HDD), or solid-state drive (SSD), etc.; the storage medium can also include combinations of the above types of memory.

[0108] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0109] This application provides a control method, apparatus, equipment, and medium for a strip steel temperature control system. It can acquire the actual operating speed, actual temperature, and target temperature of the strip steel. Upon receiving a heating command, it determines the heating current of the heating module based on the actual operating speed, actual temperature, and target temperature. When the strip steel needs heating, it determines the heating current of the heating module based on three parameters affecting the heating intensity; the magnitude of the heating current directly affects the heating intensity. It controls the start of the fan and heating module, and controls the heating module to operate with the heating current, ensuring that the hot air discharged from the air outlet is sufficiently strong to heat the strip steel to the target temperature. This method heats the strip steel by blowing hot air onto it, increasing the edge temperature of the strip steel. The heating method is very gentle, does not affect the performance of the strip steel, and is applicable to strip steel of any grade.

[0110] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0111] Similarly, it should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into this detailed description, wherein each claim itself is a separate embodiment of the invention.

[0112] It should be noted that the above embodiments are illustrative of the invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The invention can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

Claims

1. A control method for a strip steel temperature control system, characterized in that, The heating system includes a fan and an exhaust duct with an inner cavity. The air outlet of the fan communicates with the inner cavity of the exhaust duct. A heating module is installed inside the fan. An air outlet communicating with the inner cavity is opened on the exhaust duct. The method includes: Obtain the actual running speed, actual temperature, and target temperature of the strip steel; If a heating command is received, the heating current of the heating module is determined based on the actual operating speed, the actual temperature, and the target temperature. The fan and the heating module are started, and the heating module is operated with the heating current to heat the strip steel with hot air discharged through the air outlet. Determining the heating current of the heating module based on the actual operating speed, the actual temperature, and the target temperature includes: Obtain the maximum current of the heating module and the maximum operating speed of the strip steel; Calculate the first ratio of the actual operating speed to the maximum limited operating speed; Calculate the second ratio of the actual temperature to the target temperature; The heating current of the heating module is determined based on the maximum current, the first ratio, and the second ratio. Determining the heating current of the heating module based on the maximum current, the first ratio, and the second ratio includes: Obtain a preset temperature control coefficient, wherein the temperature control coefficient is greater than 0 and less than 1; Calculate the second power of the ratio of the temperature regulation coefficient to obtain the target value; The heating current of the heating module is determined by multiplying the maximum current, the target value, and the first ratio.

2. The control method for the strip steel temperature control system according to claim 1, characterized in that, After obtaining the actual operating speed, actual temperature, and target temperature of the strip steel, the method further includes: If a cooling command is received, the target air volume of the fan is determined based on the actual operating speed, the actual temperature, and the target temperature. Start the fan and turn off the heating module, and control the fan's airflow to the target airflow so that the cold air discharged through the air outlet can cool the strip steel.

3. The control method for the strip steel temperature control system according to claim 1, characterized in that, The exhaust duct has a U-shaped cross-section. Multiple air outlets communicating with the inner cavity are provided on the inner surfaces of the two side walls of the exhaust duct. An air inlet communicating with the inner cavity is provided on the outer surface of the bottom wall of the exhaust duct. The air inlet is connected to the air outlet of the fan. The inner side of the exhaust duct is used to accommodate the edge of the strip steel.

4. The control method for the strip steel temperature control system according to claim 3, characterized in that, The bottom wall of the exhaust duct is provided with a protrusion for dividing the airflow. The bottom surface of the protrusion coincides with the inner surface of the bottom wall. The protrusion extends toward the air inlet. The distance between the apex of the protrusion and the air inlet is less than a preset distance threshold.

5. The control method for the strip steel temperature control system according to claim 4, characterized in that, The cross-section of the protrusion is triangular.

6. A control device for a strip steel temperature control system, characterized in that, The heating system includes a fan and an exhaust duct with an inner cavity. The air outlet of the fan communicates with the inner cavity of the exhaust duct. A heating module is installed inside the fan. An air outlet communicating with the inner cavity is opened on the exhaust duct. The device includes: The acquisition module is used to acquire the actual running speed, actual temperature, and target temperature of the strip steel. The first determining module is used to determine the heating current of the heating module based on the actual operating speed, the actual temperature, and the target temperature if a heating command is received. The control module is used to control the start-up of the fan and the heating module, and to control the heating module to operate with the heating current so as to heat the strip steel with hot air discharged through the air outlet; Determining the heating current of the heating module based on the actual operating speed, the actual temperature, and the target temperature includes: Obtain the maximum current of the heating module and the maximum operating speed of the strip steel; Calculate the first ratio of the actual operating speed to the maximum limited operating speed; Calculate the second ratio of the actual temperature to the target temperature; The heating current of the heating module is determined based on the maximum current, the first ratio, and the second ratio. Determining the heating current of the heating module based on the maximum current, the first ratio, and the second ratio includes: Obtain a preset temperature control coefficient, wherein the temperature control coefficient is greater than 0 and less than 1; Calculate the second power of the ratio of the temperature regulation coefficient to obtain the target value; The heating current of the heating module is determined by multiplying the maximum current, the target value, and the first ratio.

7. An electronic device, characterized in that, include: A memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, the processor executing the computer instructions to perform the method of any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to perform the method of any one of claims 1-5.

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