Temperature control method, device and equipment for strip steel

Abstract

The invention discloses a strip steel temperature control method, device and equipment which are applied to a strip steel production line, the strip steel production line comprises an annealing furnace and a zinc pot, a temperature detection device is arranged on a furnace nose of the annealing furnace, and the method comprises the steps that physical information of target strip steel is obtained, and the target temperature set for the target strip steel is obtained, the deviation between the target temperature and the zinc liquid temperature of the zinc pot is smaller than a preset first temperature deviation threshold value; and when the target strip steel enters a rapid cooling section of the annealing furnace, a fan of the rapid cooling section is controlled to cool the target strip steel based on the physical information and the target temperature, so that the deviation between the detection temperature and the target temperature is smaller than a preset second temperature deviation threshold value, and the detection temperature is obtained by conducting temperature detection on the target strip steel through a temperature detection device. The technical problem that the temperature fluctuation of the zinc liquid in the zinc pot is large is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of galvanizing, and in particular relates to a temperature control method, device and equipment for a steel strip. Background Art

[0002] When galvanizing steel strips, if the temperature of the steel strips differs greatly from the temperature of the zinc liquid in the zinc pot, the temperature of the zinc liquid may fluctuate greatly, thus affecting the quality of the coating. For example, if the temperature of the zinc liquid is too low, the fluidity of the zinc liquid may deteriorate, the coating may be uneven, and the surface may become rough. Therefore, the large temperature fluctuation of the zinc liquid in the zinc pot is a technical problem that needs to be solved urgently. Summary of the invention

[0003] The embodiments of the present invention provide a temperature control method, device and equipment for a steel strip, which solve the technical problem of large temperature fluctuation of zinc liquid in a zinc pot.

[0004] In a first aspect, an embodiment of the present invention provides a temperature control method for a steel strip, which is applied to a steel strip production line, wherein the steel strip production line includes an annealing furnace and a zinc pot, and a temperature detection device is provided on the nose of the annealing furnace, and the method includes: obtaining physical information of a target steel strip, and obtaining a target temperature set for the target steel strip, wherein a deviation between the target temperature and the zinc liquid temperature of the zinc pot is less than a preset first temperature deviation threshold; when the target steel strip enters a rapid cooling section of the annealing furnace, based on the physical information and the target temperature, controlling a fan of the rapid cooling section to cool the target steel strip, so that a deviation between the detected temperature and the target temperature is less than a preset second temperature deviation threshold, and the detected temperature is obtained by the temperature detection device performing temperature detection on the target steel strip.

[0005] In combination with the first aspect of the present invention, in some embodiments, obtaining the target temperature set for the target steel strip includes: obtaining historical data of the molten zinc temperature of the zinc pot; determining an estimated molten zinc temperature of the zinc pot based on the historical data of the molten zinc temperature; and determining the target temperature based on the estimated molten zinc temperature.

[0006] In combination with the first aspect of the present invention, in some embodiments, obtaining the target temperature set for the target steel strip includes: obtaining the current temperature of the zinc liquid in the zinc pot; and determining the target temperature based on the current temperature of the zinc liquid and a preset first temperature reduction amount.

[0007] In combination with the first aspect of the present invention, in some embodiments, the physical information includes thickness and speed, and controlling the fan in the rapid cooling section to cool the target strip based on the physical information and the target temperature includes: determining a first target speed of the fan based on the thickness, the speed and the target temperature; and controlling the fan based on the first target speed to cool the target strip.

[0008] In combination with the first aspect of the present invention, in some embodiments, determining the first target speed of the fan based on the thickness, the speed and the target temperature includes: determining the first outlet temperature setting value of the fast cooling section based on the target temperature; determining the first target speed based on the thickness, the speed and the first outlet temperature setting value.

[0009] In combination with the first aspect of the present invention, in some embodiments, controlling the fan based on the first target speed includes: determining a temperature deviation between the detected temperature and the target temperature; based on the temperature deviation, correcting the first target speed to obtain a second target speed; and controlling the fan based on the second target speed.

[0010] In combination with the first aspect of the present invention, in some embodiments, the first target speed is corrected based on the temperature deviation to obtain a second target speed, including: determining an outlet temperature correction amount of the fast cooling section based on the temperature deviation; correcting the first outlet temperature setting value based on the outlet temperature correction amount to obtain a second outlet temperature setting value of the fast cooling section; and determining the second target speed based on the thickness, the speed and the second outlet temperature setting value.

[0011] In combination with the first aspect of the present invention, in some embodiments, before controlling the fan of the rapid cooling section to cool the target strip based on the physical information and the target temperature, it also includes: when it is detected that the weld is located at the entrance of the annealing furnace, starting to obtain the running time and running speed of the weld in the annealing furnace, wherein the weld is the weld of the target strip and the previous adjacent strip of the target strip; based on the running time and the running speed, determining the running distance of the weld in the annealing furnace; if the deviation between the running distance and the preset distance is less than a preset distance deviation threshold, it is determined that the target strip enters the rapid cooling section of the annealing furnace, and the preset distance is the distance between the entrance of the annealing furnace and the entrance of the rapid cooling section.

[0012] In a second aspect, an embodiment of the present invention provides a temperature control device for a steel strip, which is applied to a steel strip production line, wherein the steel strip production line includes an annealing furnace and a zinc pot, and a temperature detection device is arranged on the nose of the annealing furnace, and the device includes: a data acquisition unit, for acquiring physical information of a target steel strip, and acquiring a target temperature set for the target steel strip, wherein a deviation between the target temperature and the zinc liquid temperature of the zinc pot is less than a preset first temperature deviation threshold; a cooling unit, for controlling a fan in the rapid cooling section to cool the target steel strip based on the physical information and the target temperature when the target steel strip enters the rapid cooling section of the annealing furnace, so that a deviation between the detected temperature and the target temperature is less than a preset second temperature deviation threshold, and the detected temperature is obtained by the temperature detection device performing temperature detection on the target steel strip.

[0013] In a third aspect, an embodiment of the present invention provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any one of the methods described in the first aspect when executing the computer program.

[0014] One or more technical solutions provided by the embodiments of the present invention achieve at least the following technical effects or advantages:

[0015] The embodiment of the present invention obtains the physical information of the target steel strip and the target temperature set for the target steel strip, and the deviation between the target temperature and the temperature of the zinc liquid in the zinc pot is less than the preset first temperature deviation threshold; when the target steel strip enters the rapid cooling section of the annealing furnace, based on the physical information and the target temperature, the fan of the rapid cooling section is controlled to cool the target steel strip, so that the deviation between the detected temperature and the target temperature is less than the preset second temperature deviation threshold, and the detected temperature is obtained by the temperature detection device performing temperature detection on the target steel strip. Based on the physical information and the target temperature, the fan of the rapid cooling section is controlled to cool the target steel strip, which can ensure that the detected temperature of the target steel strip on the furnace nose reaches the target temperature. Since the target temperature is determined according to the temperature of the zinc liquid in the zinc pot, the difference between the temperature of the steel strip and the temperature of the zinc liquid in the zinc pot is reduced. Therefore, the temperature fluctuation of the zinc liquid in the zinc pot is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 Flow chart of the temperature control method of the strip steel in an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of a strip steel production line according to an embodiment of the present invention;

[0019] Figure 3 This is a functional module diagram of a temperature control device for a steel strip according to an embodiment of the present invention;

[0020] Figure 4 FIG. 4 is a schematic diagram of the structure of an electronic device in an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] The embodiment of the present invention provides a temperature control method for a steel strip, which is applied to a steel strip production line. The steel strip production line includes an annealing furnace and a zinc pot. A temperature detection device is provided on the nose of the annealing furnace. Figure 1 As shown, the method includes the following steps S101-S102:

[0024] S101: Acquire physical information of a target steel strip, and acquire a target temperature set for the target steel strip, wherein a deviation between the target temperature and the temperature of the zinc liquid in the zinc pot is less than a preset first temperature deviation threshold.

[0025] In some embodiments, obtaining a target temperature set for a target steel strip may include: obtaining historical data on the temperature of the zinc liquid in the zinc pot; determining an estimated temperature of the zinc liquid in the zinc pot based on the historical data on the temperature of the zinc liquid; and determining a target temperature based on the estimated temperature of the zinc liquid.

[0026] Specifically, the target temperature may be determined based on the estimated temperature of the zinc liquid, and the sum of the estimated temperature of the zinc liquid and the preset first temperature reduction amount may be used as the target temperature.

[0027] refer to Figure 2 As shown, Figure 2 It is a schematic diagram of the strip steel production line in an embodiment of the present invention. The temperature detection device is arranged on the furnace nose, specifically, it can be a position 2.5 meters away from the entrance of the zinc pot. Since there is a small distance between the temperature detection device and the zinc pot, the target strip steel will have a certain temperature drop in the process of moving from the temperature detection device to the zinc pot. Therefore, in order to make the strip steel temperature as close as possible to the zinc liquid temperature when the target strip steel enters the zinc pot, it is necessary to consider the temperature drop, that is, the first temperature drop. The first temperature drop can be a temperature value less than 20°C, such as 10°C, 5°C or 1°C, etc. It should be noted that the sum of the estimated temperature of the zinc liquid and the preset first temperature drop is used as the target temperature. Since the estimated temperature of the zinc liquid is a fixed value, the target temperature is a fixed value, which avoids frequent changes in the target temperature, and also avoids the target temperature from becoming an unreasonable value, thereby avoiding the difference between the strip temperature and the zinc liquid temperature being too large.

[0028] In other embodiments, obtaining the target temperature set for the target steel strip may include: obtaining the current temperature of the zinc liquid in the zinc pot; and determining the target temperature based on the current temperature of the zinc liquid and a preset first temperature reduction amount.

[0029] Specifically, the target temperature may be determined based on the current temperature of the zinc liquid and the preset first temperature reduction amount. This may be accomplished by taking the sum of the current temperature of the zinc liquid and the preset first temperature reduction amount as the target temperature.

[0030] It should be noted that the zinc liquid temperature may refer to the estimated zinc liquid temperature or the current zinc liquid temperature. The first temperature deviation threshold may be a temperature deviation value less than 10°C, such as 7°C, 4°C or 1°C.

[0031] S102: When the target strip enters the rapid cooling section of the annealing furnace, based on the physical information and the target temperature, the fan of the rapid cooling section is controlled to cool the target strip so that the deviation between the detected temperature and the target temperature is less than a preset second temperature deviation threshold. The detected temperature is obtained by the temperature detection device performing temperature detection on the target strip.

[0032] In some embodiments, in step S102, the physical information includes thickness and speed. Based on the physical information and the target temperature, controlling the fan in the rapid cooling section to cool the target strip may include the following steps S1021-S1022:

[0033] S1021: Determine a first target rotation speed of the fan based on the thickness, speed and target temperature.

[0034] In some embodiments, step S1021 may include: determining a first outlet temperature setting value of the rapid cooling section based on the target temperature; and determining a first target rotation speed based on the thickness, speed, and the first outlet temperature setting value.

[0035] It should be noted that if the thickness is larger, the target strip needs to dissipate more heat to ensure that the target strip is cooled to the outlet temperature setting value of the rapid cooling section, that is, the larger the thickness, the larger the target speed. If the speed is faster, the target strip needs to dissipate more heat per unit time to ensure that the target strip is cooled to the outlet temperature setting value of the rapid cooling section, that is, the faster the speed, the larger the target speed. If the first outlet temperature setting value is lower, the target strip needs to cool more, that is, the lower the first outlet temperature setting value, the larger the target speed. Therefore, determining the first target speed based on the thickness, speed and the first outlet temperature setting value avoids the situation where the target speed is determined by only a single influencing factor, resulting in inaccurate strip temperature control, thereby improving the accuracy of strip temperature control.

[0036] In some embodiments, the first target rotational speed is determined based on the thickness, speed and the first outlet temperature setting value, which can be: taking the product of thickness and speed as the strip plate temperature feedforward control parameter; and determining the first target rotational speed based on the strip plate temperature feedforward control parameter and the first outlet temperature setting value.

[0037] In some embodiments, based on the target temperature, the first outlet temperature setting value of the rapid cooling section is determined, which may be: the sum of the target temperature and the second temperature reduction amount is used as the first outlet temperature setting value of the rapid cooling section. It should be noted that since there is a certain distance between the location of the temperature detection device and the outlet of the rapid cooling section, the target strip will have a certain temperature drop in the process of moving from the outlet of the rapid cooling section to the location of the temperature detection device. Therefore, in order to ensure that the detected temperature of the target strip can reach the target temperature when the target strip arrives at the location of the temperature detection device, the temperature drop, i.e., the second temperature reduction amount, needs to be considered.

[0038] It should be noted that, when the second temperature reduction amount is taken into consideration, the influencing factors are considered more comprehensively, the temperature control accuracy of the strip is improved, and the difference between the strip temperature and the zinc liquid temperature of the zinc pot is reduced, thereby reducing the temperature fluctuation of the zinc liquid in the zinc pot.

[0039] In other embodiments, a heat preservation device is provided between the temperature detection device and the outlet of the rapid cooling section. Then, based on the target temperature, the first outlet temperature setting value of the rapid cooling section is determined, which may be: the target temperature is used as the first outlet temperature setting value of the rapid cooling section. It should be noted that the heat preservation temperature of the heat preservation device may be set according to the target temperature. The heat preservation device may prevent the target strip from experiencing a temperature drop during the process of moving from the outlet of the rapid cooling section to the location of the temperature detection device. Therefore, the target temperature may be directly used as the first outlet temperature setting value of the rapid cooling section.

[0040] S1022: Based on the first target rotation speed, control the fan to cool the target strip.

[0041] In some embodiments, step S1022 may include: determining a temperature deviation between the detected temperature and the target temperature; based on the temperature deviation, correcting the first target speed to obtain a second target speed; and controlling the fan based on the second target speed.

[0042] It should be noted that if the fan is controlled directly based on the first target speed, inaccurate temperature control may occur. At this time, the temperature detection device plays the role of detecting the degree of deviation. By feedback adjustment through temperature detection, the target speed is further corrected, thereby improving the accuracy of the target speed and further improving the accuracy of strip temperature control.

[0043] In some embodiments, determining the temperature deviation between the detected temperature and the target temperature may include taking the difference between the detected temperature and the target temperature as the temperature deviation.

[0044] In some embodiments, based on the temperature deviation, the first target speed is corrected to obtain the second target speed, which may include: determining the outlet temperature correction amount of the fast cooling section based on the temperature deviation; correcting the first outlet temperature setting value based on the outlet temperature correction amount to obtain the second outlet temperature setting value of the fast cooling section; determining the second target speed based on the thickness, speed and the second outlet temperature setting value.

[0045] In some embodiments, determining the outlet temperature correction amount of the rapid cooling section based on the temperature deviation may include using the temperature deviation as the outlet temperature correction amount of the rapid cooling section.

[0046] In some embodiments, the first outlet temperature setting value is corrected based on the outlet temperature correction amount to obtain the second outlet temperature setting value of the fast cooling section, which can be: the difference between the first outlet temperature setting value and the outlet temperature correction amount is used as the second outlet temperature setting value.

[0047] In some embodiments, before controlling the fan of the rapid cooling section to cool the target strip based on physical information and the target temperature, it may also include: when it is detected that the weld is located at the entrance of the annealing furnace, starting to obtain the running time and running speed of the weld in the annealing furnace, wherein the weld is the weld of the target strip and the previous adjacent strip of the target strip; based on the running time and running speed, determining the running distance of the weld in the annealing furnace; if the deviation between the running distance and the preset distance is less than the preset distance deviation threshold, it is determined that the target strip enters the rapid cooling section of the annealing furnace, and the preset distance is the distance between the entrance of the annealing furnace and the entrance of the rapid cooling section.

[0048] It should be noted that the running speed of the weld may vary, so it is necessary to record the running speed in different time periods, and then calculate the running distance in each time period, and then determine whether the total running distance reaches the preset distance.

[0049] It should be noted that, without judging whether the target strip has entered the rapid cooling section of the annealing furnace, directly controlling the fan based on physical information and target temperature may lead to inaccurate strip temperature control. The reason is that: at this time, the previous adjacent strip is still in the rapid cooling section and the target strip is not in the rapid cooling section. However, the control basis of the fan has become the physical information of the target strip. Due to the mismatch between the physical information and the strip, the temperature of the previous adjacent strip cannot be accurately controlled, which leads to a large difference between the strip temperature and the zinc liquid temperature. Therefore, after judging that the target strip has entered the rapid cooling section of the annealing furnace, turning on the fan that controls the rapid cooling section based on physical information and target temperature to cool the target strip can ensure that the physical information matches the strip, so as to improve the accuracy of the strip temperature control.

[0050] It should be noted that if the cooling temperature of the strip is controlled to be 10 to 15°C higher than that at the furnace nose only by using a pyrometer at the outlet of the rapid cooling section, inaccurate temperature control of the strip may result, the cooling rate will have no correlation with the temperature control of the zinc pot and zinc liquid, the strip will be slow to adjust to the target temperature, the adjustment time will be long, and the accuracy will be low.

[0051] It should be noted that a non-contact plate temperature detection device can be installed at the outlet of the rapid cooling section. Since the core heat inside the strip needs to be eliminated after the rapid cooling section to restore the uniformity of the strip temperature, only a heat preservation heating device is installed in this area to maintain the heat loss. Therefore, the temperature of the strip entering the zinc pot is controlled by controlling the target temperature value of the rapid cooling outlet. In the embodiment of the present invention, the product of the thickness of the strip entering the annealing furnace and the speed of the strip can be used as the strip temperature feedforward control parameter. According to the speed of the strip, the time point from the detection of the strip from the weld at the entrance of the annealing furnace to the entrance of the rapid cooling section is calculated by integration. The speed change of the rapid cooling fan is controlled by the change of the strip specification, and the speed of the rapid cooling fan is quickly adjusted to cool the plate temperature to near the target value. Then, the feedback PID (Proportion Integration Differentiation, proportional-integral-differential controller) controller is used to control the strip temperature to reach the target temperature. In order to prevent the strip temperature from oscillating, the original feedback control PID proportional parameter adjustment parameter is limited to [-2∽2] to prevent the human parameter setting from being misoperated, which will affect the production. During actual use of the embodiment of the present invention, when the strip steel of the same specification changes, the time for adjusting to the target temperature value at the rapid cooling section and the furnace nose is reduced from the original 3 minutes to 32 seconds, and the temperature fluctuation range is reduced to half of the original, which greatly improves the temperature control accuracy of the strip steel at the rapid cooling section and the furnace nose, reduces the impact of specification changes on the zinc liquid temperature, ensures the coating effect, and reduces the probability of sinking roller marks.

[0052] The embodiment of the present invention obtains the physical information of the target steel strip and the target temperature set for the target steel strip, and the deviation between the target temperature and the temperature of the zinc liquid in the zinc pot is less than the preset first temperature deviation threshold; when the target steel strip enters the rapid cooling section of the annealing furnace, based on the physical information and the target temperature, the fan of the rapid cooling section is controlled to cool the target steel strip, so that the deviation between the detected temperature and the target temperature is less than the preset second temperature deviation threshold, and the detected temperature is obtained by the temperature detection device performing temperature detection on the target steel strip. Based on the physical information and the target temperature, the fan of the rapid cooling section is controlled to cool the target steel strip, which can ensure that the detected temperature of the target steel strip on the furnace nose reaches the target temperature. Since the target temperature is determined according to the temperature of the zinc liquid in the zinc pot, the difference between the temperature of the steel strip and the temperature of the zinc liquid in the zinc pot is reduced. Therefore, the temperature fluctuation of the zinc liquid in the zinc pot is reduced.

[0053] Based on the same inventive concept, Figure 3As shown, an embodiment of the present invention provides a temperature control device 10 for a steel strip, which is applied to a steel strip production line. The steel strip production line includes an annealing furnace and a zinc pot. A temperature detection device is provided on the nose of the annealing furnace. The temperature control device 10 for the steel strip includes: a data acquisition unit 110, which is used to acquire physical information of a target steel strip, and acquire a target temperature set for the target steel strip, wherein a deviation between the target temperature and the zinc liquid temperature of the zinc pot is less than a preset first temperature deviation threshold; a cooling unit 120, which is used to control a fan in the rapid cooling section to cool the target steel strip based on the physical information and the target temperature when the target steel strip enters the rapid cooling section of the annealing furnace, so that a deviation between the detected temperature and the target temperature is less than a preset second temperature deviation threshold, and the detected temperature is obtained by the temperature detection device performing temperature detection on the target steel strip.

[0054] In some embodiments, the data acquisition unit 110 is specifically used to: acquire historical data of the zinc liquid temperature of the zinc pot; determine an estimated zinc liquid temperature of the zinc pot based on the historical data of the zinc liquid temperature; and determine a target temperature based on the estimated zinc liquid temperature.

[0055] In other embodiments, the data acquisition unit 110 is specifically used to: acquire the current temperature of the zinc liquid in the zinc pot; and determine the target temperature based on the current temperature of the zinc liquid and a preset first temperature reduction amount.

[0056] It can be understood that the physical information includes thickness and speed, so the cooling unit 120 includes: a speed determination subunit, used to determine the first target speed of the fan based on the thickness, speed and target temperature; a control subunit, used to control the fan based on the first target speed to cool the target strip.

[0057] It can be understood that the speed determination subunit is specifically used to: determine the first outlet temperature setting value of the rapid cooling section based on the target temperature; determine the first target speed based on the thickness, speed and the first outlet temperature setting value.

[0058] It can be understood that the control subunit is specifically used to: determine the temperature deviation between the detected temperature and the target temperature; based on the temperature deviation, correct the first target speed to obtain the second target speed; based on the second target speed, control the fan; wherein, based on the temperature deviation, the first target speed is corrected to obtain the second target speed, including: based on the temperature deviation, determining the outlet temperature correction amount of the fast cooling section; based on the outlet temperature correction amount, correcting the first outlet temperature setting value to obtain the second outlet temperature setting value of the fast cooling section; based on the thickness, speed and the second outlet temperature setting value, determining the second target speed.

[0059] It can be understood that the temperature control device 10 of the strip also includes: a judgment unit, which is used to control the fan of the rapid cooling section to cool the target strip based on physical information and the target temperature, and when it is detected that the weld is located at the entrance of the annealing furnace, start obtaining the running time and running speed of the weld in the annealing furnace, wherein the weld is the weld of the target strip and the previous adjacent strip of the target strip; based on the running time and running speed, determine the running distance of the weld in the annealing furnace; if the deviation between the running distance and the preset distance is less than the preset distance deviation threshold, it is determined that the target strip enters the rapid cooling section of the annealing furnace, and the preset distance is the distance between the entrance of the annealing furnace and the entrance of the rapid cooling section.

[0060] It should be understood that more implementation details of the temperature control device 10 for the steel strip in the embodiment of the present invention can be found in the temperature control method for the steel strip described above, and will not be described in detail here for the sake of brevity.

[0061] Based on the same inventive concept, an embodiment of the present invention further provides an electronic device, such as Figure 4 As shown, it includes a memory 404, a processor 402, and a computer program stored in the memory 404 and executable on the processor 402. The processor 402 executes the program to implement the steps described in any implementation of the temperature control method for the strip.

[0062] Among them, Figure 4 In the embodiment of the present invention, a bus architecture (represented by bus 400) is shown, which may include any number of interconnected buses and bridges, and bus 400 links various circuits including one or more processors represented by processor 402 and memory represented by memory 404. Bus 400 may also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. Bus interface 405 provides an interface between bus 400 and receiver 401 and transmitter 403. Receiver 401 and transmitter 403 may be the same element, namely a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 402 is responsible for managing bus 400 and general processing, while memory 404 may be used to store data used by processor 402 when performing operations.

[0063] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on a computer-readable medium or transmitted via a computer-readable medium. Other examples and implementations are within the scope and spirit of the present invention and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these. In addition, each functional unit may be integrated into a processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit.

[0064] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0065] The units described as separate components may or may not be physically separated, and the components of the control device may or may not be physical units, that is, they may be located in one place or distributed in multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0066] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0067] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A method for controlling the temperature of a steel strip, characterized in that: Applied to a strip steel production line, the strip steel production line includes an annealing furnace and a zinc pot, a temperature detection device is provided on the nose of the annealing furnace, and the method includes: Acquire physical information of a target steel strip, and acquire a target temperature set for the target steel strip, wherein a deviation between the target temperature and the zinc liquid temperature of the zinc pot is less than a preset first temperature deviation threshold; When the target steel strip enters the rapid cooling section of the annealing furnace, based on the physical information and the target temperature, the fan of the rapid cooling section is controlled to cool the target steel strip so that the deviation between the detected temperature and the target temperature is less than a preset second temperature deviation threshold, and the detected temperature is obtained by the temperature detection device performing temperature detection on the target steel strip.

2. The temperature control method of the steel strip according to claim 1, characterized in that: The step of obtaining a target temperature set for the target steel strip comprises: Acquiring historical data of the zinc liquid temperature of the zinc pot; Determining an estimated temperature of the molten zinc in the zinc pot based on the molten zinc temperature historical data; The target temperature is determined based on the estimated temperature of the zinc solution.

3. The temperature control method of the steel strip according to claim 1, characterized in that: The step of obtaining a target temperature set for the target steel strip comprises: Obtaining the current temperature of the zinc liquid in the zinc pot; The target temperature is determined based on the current temperature of the zinc liquid and a preset first temperature reduction amount.

4. The temperature control method of the steel strip according to claim 1, characterized in that: The physical information includes thickness and speed, and based on the physical information and the target temperature, controlling the fan of the rapid cooling section to cool the target strip steel includes: determining a first target rotation speed of the fan based on the thickness, the speed and the target temperature; Based on the first target rotational speed, the fan is controlled to cool the target steel strip.

5. The temperature control method of the steel strip according to claim 4, characterized in that: The step of determining a first target rotation speed of the fan based on the thickness, the speed and the target temperature includes: Based on the target temperature, determining a first outlet temperature setting value of the fast cooling section; The first target rotational speed is determined based on the thickness, the velocity, and the first outlet temperature setting.

6. The temperature control method of the steel strip according to claim 5, characterized in that: The controlling the fan based on the first target speed includes: determining a temperature deviation between the detected temperature and the target temperature; Based on the temperature deviation, correcting the first target speed to obtain a second target speed; The fan is controlled based on the second target speed.

7. The temperature control method of the steel strip according to claim 6, characterized in that: The step of correcting the first target speed based on the temperature deviation to obtain a second target speed includes: Based on the temperature deviation, determining an outlet temperature correction amount of the rapid cooling section; Based on the outlet temperature correction amount, the first outlet temperature setting value is corrected to obtain a second outlet temperature setting value of the fast cooling section; The second target rotational speed is determined based on the thickness, the speed, and the second outlet temperature setting.

8. The temperature control method of the steel strip according to claim 1, characterized in that: Before controlling the fan of the rapid cooling section to cool the target steel strip based on the physical information and the target temperature, the method further includes: When it is detected that the weld is located at the entrance of the annealing furnace, start to obtain the running time and running speed of the weld in the annealing furnace, wherein the weld is the weld between the target steel strip and the previous adjacent steel strip of the target steel strip; Determining a running distance of the weld in the annealing furnace based on the running time and the running speed; If the deviation between the running distance and the preset distance is less than a preset distance deviation threshold, it is determined that the target strip enters the rapid cooling section of the annealing furnace, and the preset distance is the distance between the annealing furnace entrance and the rapid cooling section entrance.

9. A temperature control device for a steel strip, characterized in that: Applied to a strip steel production line, the strip steel production line includes an annealing furnace and a zinc pot, and a temperature detection device is provided on the nose of the annealing furnace, the device includes: A data acquisition unit, used to acquire physical information of a target steel strip and a target temperature set for the target steel strip, wherein a deviation between the target temperature and the zinc liquid temperature of the zinc pot is less than a preset first temperature deviation threshold; A cooling unit is used to control the fan of the rapid cooling section to cool the target steel strip when the target steel strip enters the rapid cooling section of the annealing furnace based on the physical information and the target temperature, so that the deviation between the detected temperature and the target temperature is less than a preset second temperature deviation threshold, and the detected temperature is obtained by the temperature detection device performing temperature detection on the target steel strip.

10. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method according to any one of claims 1 to 8 when executing the computer program.

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