A control method, device, medium, and equipment for preventing strip steel deviation in a furnace.

Abstract

This application provides a method, device, medium, and equipment for controlling strip steel deviation in an annealing furnace. The method involves continuous annealing of one coil of strip steel welded from different strip steels. The method includes: controlling the annealing speed of the annealing furnace to be less than or equal to a preset speed before the weld between the two coils enters the annealing furnace; increasing the tension of each section of the annealing furnace by 20% based on a set tension; and adjusting the furnace temperature. The method also includes determining the annealing temperature of the next coil of strip steel based on the yield strength of the previous coil, thereby preventing strip steel deviation in the annealing furnace. This application solves the problem of frequent strip steel deviation accidents during annealing in the prior art. The proposed solution avoids strip steel deviation accidents by controlling various parameters in the annealing process in advance, ensuring stable operation of the unit and improving the quality of the strip steel.

Description

Technical Field

[0001] This application relates to the field of steel rolling technology, and in particular to a control method, device, medium and equipment for preventing strip steel from deviating in the furnace. Background Technology

[0002] In recent years, with the increasing demands for low-carbon and environmentally friendly practices, energy conservation and emission reduction, and improved economic efficiency, industrial users have become increasingly stringent in their requirements for the quality and precision of cold-rolled strip steel products. During the annealing process of cold-rolled strip steel, deviations in strip shape and specifications can cause misalignment. In the cold-rolled galvanizing production process, this misalignment problem is now widespread in various factory production lines, and the resulting product downgrading due to misalignment is becoming increasingly serious.

[0003] Therefore, how to adopt an effective method to prevent strip steel from running off-center in the furnace during the annealing process and ensure high-quality and stable production of strip steel is an urgent technical problem to be solved. Summary of the Invention

[0004] The purpose of this application is to provide a control method, device, medium, and equipment for preventing strip steel from deviating inside the furnace. This application solves the problem of frequent deviating accidents inside the furnace during the annealing process of strip steel in the prior art. The solution proposed in this application avoids strip steel deviating accidents inside the furnace by controlling various parameters in the annealing process in advance, thereby ensuring the stable operation of the unit and improving the quality of the strip steel.

[0005] Specifically, this application adopts the following technical solution:

[0006] According to one aspect of the embodiments of this application, a control method for preventing strip steel deviation in an annealing furnace is provided, wherein the previous coil of strip steel and the next coil of strip steel are welded from different strip steels and undergo continuous annealing. The method includes: before the weld between the previous coil of strip steel and the next coil of strip steel enters the annealing furnace, controlling the annealing speed of the annealing furnace to be less than or equal to a preset speed; controlling the tension of each section of the annealing furnace to increase by 20% based on a set tension, and adjusting the furnace temperature of the annealing furnace; and determining the annealing temperature of the next coil of strip steel based on the yield properties of the previous coil of strip steel, so as to prevent the strip steel from deviating in the annealing furnace.

[0007] In some embodiments of this application, based on the foregoing scheme, adjusting the furnace temperature of the annealing furnace includes: real-time detection of the furnace temperature by scanning a pyrometer; if the furnace temperature is lower than a preset temperature, controlling the furnace temperature to be increased; if the furnace temperature is higher than the preset temperature, controlling the furnace temperature to be decreased.

[0008] In some embodiments of this application, based on the foregoing scheme, determining the annealing temperature of the next coil of strip steel according to the yield strength of the previous coil includes: if the yield strength of the previous coil of strip steel only has an upper yield limit, then controlling the annealing temperature of the next coil of strip steel to be increased by 30°C based on the annealing temperature of the previous coil of strip steel; if the yield strength of the previous coil of strip steel only has a lower yield limit, then controlling the annealing temperature of the next coil of strip steel to be decreased by 15°C based on the annealing temperature of the previous coil of strip steel; if the yield strength of the previous coil of strip steel has both an upper yield limit and a lower yield limit, then controlling the annealing temperature of the next coil of strip steel to be x-10°C to x+10°C, where x is the annealing temperature of the previous coil of strip steel.

[0009] In some embodiments of this application, based on the foregoing scheme, the method further includes: when the previous coil of strip steel and the next coil of strip steel are annealed in the heating section of the annealing furnace, the temperature drop of the previous coil of strip steel and the next coil of strip steel is controlled to be less than or equal to a first preset temperature.

[0010] In some embodiments of this application, based on the aforementioned scheme, the first preset temperature is 20°C.

[0011] In some embodiments of this application, based on the foregoing scheme, the preset speed is 120m / min.

[0012] In some embodiments of this application, based on the foregoing scheme, the annealing furnace includes a preheating section, a heating section, a homogenizing section, a cooling section, and a balancing section.

[0013] According to one aspect of the embodiments of this application, a control device for preventing strip steel deviation in an annealing furnace is provided. The device includes: a first control unit, configured to control the annealing speed of the annealing furnace to be less than or equal to a preset speed before the weld between the previous and next coils of strip steel enters the annealing furnace; a second control unit, configured to control the tension of each section of the annealing furnace to increase by 20% based on a set tension, and to adjust the furnace temperature of the annealing furnace; and a determination unit, configured to determine the annealing temperature of the next coil of strip steel based on the yield strength of the previous coil, so as to prevent the strip steel from deviating in the annealing furnace.

[0014] According to one aspect of the embodiments of this application, a computer-readable storage medium is provided, wherein at least one piece of program code is stored in the computer-readable storage medium, the at least one piece of program code being loaded and executed by a processor to implement the operations performed by the control method for preventing strip steel deviation in the furnace described above.

[0015] According to one aspect of the present application, an electronic device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the operations performed by the control method described above for preventing strip steel deviation in a furnace.

[0016] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0017] The proposed solution can solve the problem of frequent furnace deviation accidents in the annealing process of strip steel in the prior art. The proposed solution avoids the occurrence of strip steel deviation accidents in the furnace by controlling various parameters in the annealing process in advance, thus ensuring the stable operation of the unit and improving the quality of strip steel. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 A flowchart of a control method for preventing strip steel deviation in a furnace according to one embodiment of this application is shown;

[0020] Figure 2 A mechanical analysis diagram showing the strip deviating from its designated path within the annealing furnace in one embodiment of this application is shown.

[0021] Figure 3 A structural block diagram of a control device for preventing strip steel deviation in a furnace according to one embodiment of this application is shown;

[0022] Figure 4 A schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application is shown. Detailed Implementation

[0023] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0024] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0025] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such uses of these terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described.

[0027] The implementation details of the technical solutions in the embodiments of this application are described in detail below:

[0028] Reference Figure 1 , Figure 1 This is a flowchart of a control method for preventing strip steel deviation in a furnace according to one embodiment of this application.

[0029] According to a typical embodiment of this application, a method for preventing strip steel deviation in a furnace is provided, wherein the previous coil of strip steel and the next coil of strip steel are welded from different strip steels and continuously annealed. The method includes the following steps S1 to S3:

[0030] Step S1: Before the weld between the previous and next coils of strip steel enters the annealing furnace, control the annealing speed of the annealing furnace to be less than or equal to the preset speed.

[0031] In this application,

[0032] Step S2: Increase the tension of each section of the annealing furnace by 20% based on the set tension, and adjust the furnace temperature of the annealing furnace.

[0033] Step S3: Determine the annealing temperature of the next coil of strip based on the yield properties of the previous coil of strip to prevent the strip from deviating in the annealing furnace.

[0034] In this application, the strip steel is continuously running on the production line and mainly comes into contact with various rollers. From a force perspective, if the lateral disturbance force on the strip steel cannot overcome the lateral static friction force between the strip steel and the rollers, the strip steel will not deviate; if the lateral disturbance force on the strip steel can overcome the lateral static friction force between the strip steel and the rollers, the strip steel will deviate from its original center line of motion, thus causing deviation, until the lateral disturbance force is less than the lateral static friction force, at which point the strip steel stops deviating and continues to move along the new center line.

[0035] Reference Figure 2 , Figure 2 This diagram illustrates a mechanical analysis of strip misalignment within an annealing furnace according to one embodiment of this application. The most common strip misalignment phenomenon can be analyzed using force analysis methods, for example, when the angle between strip 202 and roller 201 is not 90°. Figure 2 As shown, strip 202 is in an active state, while roller 201 is in a passive state. The angle between strip 202 and roller 201 is not 90°, so the force exerted by strip 202 on roller 201 is not perpendicular to the roller axis. Decomposing the forces along the roller 201 axis and its perpendicular direction yields forces F1 and F2. Force F2 causes roller 201 to rotate along its axis, and force F1 causes roller 201 to move upwards along its axis. Since roller 201 is axially fixed, according to the principle of action and reaction, roller 201 exerts a force F3 on strip 202 that is opposite in direction and equal in magnitude to force F1. Force F3 can cause strip 202 to tend to move to a new strip position 203. If force F3 can overcome the lateral static friction force exerted by roller 201 on strip 202, the strip will move to the new strip position 203 under the action of force F3 until strip 202 and roller 201 are perpendicular, with no component force along the roller 201 axis. This phenomenon can be described as follows: during the operation of the strip, it always tries to maintain and enter the roller axis at an angle of 90°, and this almost invisible adjustment is almost always in progress.

[0036] When strip steel undergoes cross-specification welding and continuous annealing, furnace misalignment frequently occurs. Cross-specification welding means that the previous and next strip steel coils are different, and their steel grades, specifications, and various properties may differ. During the welding process, if the tail of the previous coil is not perfectly aligned with the head of the next coil, an artificial camber will occur. This will also cause strip misalignment when the weld between the two coils enters the annealing furnace. To avoid furnace shutdowns due to steel grade transitions and camber at the weld joint, the annealing speed of the annealing furnace can be controlled to be less than or equal to a preset speed before the weld between the two coils enters the furnace; the tension in each section of the annealing furnace can be increased by 20% from the set tension.

[0037] In one embodiment of this application, the preset speed can be 120 m / min, but the preset speed can also be other speeds. This application does not impose any particular restrictions on this speed, and it can be adjusted according to the actual needs such as the steel type, specifications, and performance of the strip.

[0038] In one embodiment of this application, the annealing furnace may include a preheating section, a heating section, a homogenizing section, a cooling section, and an equalization section.

[0039] In this application, the tension of each section of the annealing furnace is increased by 20% based on the set tension. It should be noted that the annealing furnace may include a preheating section, a heating section, a soaking section, a cooling section, and a leveling section. When the strip steel is annealed in the annealing furnace, each section of the furnace will anneal according to the set tension based on the steel grade, specifications, and properties of the strip steel. For example, taking DX51D steel strip with specifications of 1.0mm*1250mm (thickness*width), the set tension in the heating section of the annealing furnace can be 15KN, and the set tension in the soaking section can be 16KN, etc. The set tension of the strip steel in each section of the annealing furnace can be appropriately selected and adjusted according to the steel grade, specifications, and properties of the strip steel; this application does not impose any special limitations on this.

[0040] It is important to note that when increasing the tension of each section of the annealing furnace by 20% from the set tension, the increased tension must strictly adhere to the tension matching of each section to avoid sudden stops of the annealing furnace's rollers due to tension mismatch. The tension increase must not exceed the limits of each section. Specifically, the tension limit for the heating and soaking sections of the annealing furnace can be 23 kN, and the tension limit for the cooling section can be 50 kN. Continuing with the example of DX51D steel strip, when increasing the tension of each section of the annealing furnace by 20% from the set tension, the tension in the heating section is increased by 20% from the set tension of 15 kN to 18 kN, and the tension in the soaking section is increased by 20% from the set tension of 16 kN to 19.2 kN. It is only necessary to ensure that the tension in the heating and soaking sections is less than or equal to 23 kN, and the tension in the cooling section is less than or equal to 50 kN. The tension of other sections of the annealing furnace can be selected and adjusted according to actual needs.

[0041] In this application, it is understood that it is necessary to ensure the stability of the annealing furnace temperature. If the temperature drops too quickly during the transition, it can also cause the strip steel to deviate from its designated position in the furnace. This is because the furnace temperature directly affects the crown of the rollers inside the furnace. The lateral static friction between the strip steel and the rollers is related to the crown of the rollers. If the temperature inside the furnace drops too quickly, the crown of the strip steel in contact with the rollers will be reduced. That is, the greater the crown of the rollers, the larger the contact area between the rollers and the strip steel, and the greater the lateral static friction between the rollers and the strip steel. It can be understood more simply as follows: the rollers undergo thermal expansion and contraction due to the temperature difference inside the furnace. When the rollers undergo thermal expansion, the higher the temperature inside the furnace, the greater the crown of the rollers, the larger the contact area between the rollers and the strip steel, and the greater the lateral static friction between the rollers and the strip steel, making it less likely for the strip steel to deviate from its designated position. When the rollers undergo contraction, the lower the temperature inside the furnace, the smaller the crown of the rollers, the smaller the contact area between the rollers and the strip steel, and the smaller the lateral static friction between the rollers and the strip steel, making it more likely for the strip steel to deviate from its designated position.

[0042] In this application, when the tension of each section of the annealing furnace is increased by 20% based on the set tension, the annealing temperature of the strip in the annealing furnace can also be increased simultaneously. Assuming the previous coil of strip is DX51D steel, if the next coil of strip is 60AA1 steel, and the annealing temperature of the DX51D steel is 800℃, in order to meet the annealing temperature of the next coil of 60AA1 steel, the temperature needs to be increased to 820℃. When increasing the annealing temperature of the strip in the annealing furnace, the furnace temperature can be appropriately adjusted according to the requirements of the annealing temperature of the next coil of strip to ensure the stability of the furnace temperature and avoid the strip from deviating in the furnace due to the difference in annealing temperatures between the previous and next coils of strip.

[0043] In one embodiment of this application, adjusting the furnace temperature of the annealing furnace includes: real-time detection of the furnace temperature using a scanning pyrometer; if the furnace temperature is lower than a preset temperature, controlling the furnace temperature to be increased; if the furnace temperature is higher than the preset temperature, controlling the furnace temperature to be decreased.

[0044] In this application, to further improve the accuracy of annealing temperature measurement, the heat treatment galvanizing line uses P15 and P16 pyrometers (which can be scanning pyrometers installed on the annealing furnace shell) instead of P2 and P3 for temperature control. For high-strength steel grades such as M4A01, 51AO1, 51AO2, and 71AA2, temperature control is more precise, thus avoiding deviation problems caused by temperature jumps. Taking DX51D steel strip as an example, in the heating section of the annealing furnace, the preset temperature of the heating section is 920℃. If the furnace temperature in the heating section is detected to be lower than 920℃, the furnace temperature is controlled to be increased; if the furnace temperature is higher than 920℃, the furnace temperature is controlled to be decreased. This ensures the stability of the annealing furnace temperature and avoids strip deviation problems caused by temperature jumps within the furnace.

[0045] In one embodiment of this application, determining the annealing temperature of the next coil of strip based on the yield strength of the previous coil includes: if the yield strength of the previous coil of strip only has an upper yield limit, then controlling the annealing temperature of the next coil of strip to be increased by 30°C based on the annealing temperature of the previous coil of strip; if the yield strength of the previous coil of strip only has a lower yield limit, then controlling the annealing temperature of the next coil of strip to be decreased by 15°C based on the annealing temperature of the previous coil of strip; if the yield strength of the previous coil of strip has both an upper and a lower yield limit, then controlling the annealing temperature of the next coil of strip to be x-10°C to x+10°C, where x is the annealing temperature of the previous coil of strip.

[0046] In this application, when the previous coil of strip steel and the next coil are continuously annealed in an annealing furnace, the annealing temperature of the next coil of strip steel can be determined based on the yield properties of the previous coil. For example, if the yield properties (yield strength) of the previous coil of strip steel only have an upper limit, then the annealing temperature of the next coil of strip steel is controlled to be increased by 30°C based on the annealing temperature of the previous coil. The previous coil of strip steel is made of DX51D steel, and the next coil of strip steel is made of 60AA1 steel. Taking strip steel as an example, the annealing temperature requirement for DX51D steel strip is 790℃, and the yield strength requirement is 0MPa-999MPa. The yield strength requirement for the next coil of 60AA1 steel strip is 260MPa-350MPa. The annealing temperature of 60AA1 steel strip should be met. The annealing temperature of the next coil of strip steel (60AA1 steel strip) should be increased by 30℃ based on the annealing temperature of the previous coil of strip steel (DX51D steel strip).

[0047] In one embodiment of this application, the method further includes: when the previous coil of strip steel and the next coil of strip steel are annealed in the heating section of the annealing furnace, controlling the temperature drop of the previous coil of strip steel and the next coil of strip steel to be less than or equal to a first preset temperature.

[0048] In one embodiment of this application, the first preset temperature can be 20°C.

[0049] In this application, since strip misalignment mainly occurs in the heating section of the annealing furnace, the strip will spontaneously move towards the convex direction of the rollers, that is, towards the sides where the tension is greatest. Therefore, when the cooling process occurs in the heating section, the cooling should adhere to the principle that the temperature drop per coil should not exceed 20°C, and the production speed should be appropriately reduced in advance (for example, reducing the annealing speed from 120m / min to 80m / min) to avoid excessive temperature drop. The furnace tension can also be manually increased. At the same time, attention should be paid to the furnace conditions reflected by the furnace camera and the position of the straightening rollers. When the strip shows a tendency to deviate, the straightening rollers should be adjusted in time to take control measures as soon as possible to avoid a large-scale strip misalignment accident.

[0050] The following describes an embodiment of the apparatus described in this application, which can be used to execute the control method for preventing strip steel deviation in the furnace described in the above embodiments of this application. For details not disclosed in the apparatus embodiments of this application, please refer to the embodiments of the control method for preventing strip steel deviation in the furnace described above in this application.

[0051] Figure 3 This is a structural block diagram of a control device for preventing strip steel from deviating inside a furnace, according to an embodiment of this application.

[0052] Reference Figure 3 As shown, a control device for preventing strip steel deviation in a furnace according to an embodiment of this application includes: a first control unit 301, a second control unit 302, and a determination unit 303.

[0053] The first control unit 301 is used to control the annealing speed of the annealing furnace to be less than or equal to a preset speed before the weld between the previous and next coils of strip enters the annealing furnace.

[0054] The second control unit 302 is used to increase the tension of each section of the annealing furnace by 20% based on the set tension, and to adjust the furnace temperature of the annealing furnace.

[0055] The determining unit 303 is used to determine the annealing temperature of the next coil of strip based on the yield properties of the previous coil of strip, so as to prevent the strip from deviating in the annealing furnace.

[0056] Reference Figure 4 , Figure 4 A schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application is shown.

[0057] like Figure 4As shown, the computer system 400 includes a Central Processing Unit (CPU) 401, which can perform various appropriate actions and processes based on programs stored in Read-Only Memory (ROM) 402 or programs loaded from storage portion 408 into Random Access Memory (RAM) 403, such as performing the methods described in the above embodiments. The RAM 403 also stores various programs and data required for system operation. The CPU 1101, ROM 402, and RAM 403 are interconnected via a bus 404. An Input / Output (I / O) interface 405 is also connected to the bus 404.

[0058] The following components are connected to I / O interface 405: an input section 406 including a keyboard, mouse, etc.; an output section 407 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 408 including a hard disk, etc.; and a communication section 409 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 409 performs communication processing via a network such as the Internet. A drive 410 is also connected to I / O interface 405 as needed. A removable medium 411, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on drive 410 as needed so that computer programs read from it can be installed into storage section 408 as needed.

[0059] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 409, and / or installed from removable medium 411. When the computer program is executed by central processing unit (CPU) 401, it performs various functions defined in the system of this application.

[0060] It should be noted that the computer-readable medium shown in the embodiments of this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In this application, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such transmitted data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. The computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to wireless, wired, etc., or any suitable combination thereof.

[0061] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. Each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that 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 consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0062] The units described in the embodiments of this application can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the specific unit itself.

[0063] According to a typical embodiment of this application, this application also proposes a computer-readable storage medium storing at least one piece of program code, which is loaded and executed by a processor to implement the operations performed by the control method for preventing strip deviating in the furnace as described above.

[0064] According to a typical embodiment of this application, this application also proposes an electronic device, which includes a memory and a processor, wherein the memory stores a computer program, characterized in that the processor executes the computer program to implement the operations performed by the control method for preventing strip deviating in the furnace as described above.

[0065] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to the embodiments of this application, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0066] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0067] Firstly, by adopting the solution proposed in this application, the problem of frequent furnace deviation accidents during the annealing process of strip steel in the prior art is solved. The solution proposed in this application avoids the occurrence of strip steel furnace deviation accidents by controlling various parameters in the annealing process in advance, thereby ensuring the stable operation of the unit and improving the quality of strip steel.

[0068] Secondly, adopting the solution proposed in this application can ensure high-quality production of strip steel, improve the quality and production efficiency of strip steel, and increase market competitiveness and financial returns.

[0069] Third, adopting the solution proposed in this application can greatly reduce the amount of scrapped steel strip and equipment damage, significantly save resources and equipment maintenance funds, and reduce costs.

[0070] Although this application has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since this application can be embodied in many forms without departing from the spirit or substance of the application, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A control method for preventing strip steel from running off in a furnace, characterized by, The method comprises the following steps: Before the weld joint of the upper strip and the lower strip enters the annealing furnace, the annealing speed of the annealing furnace is controlled to be less than or equal to a preset speed; The tension of each furnace section of the annealing furnace is controlled to be increased by 20% on the basis of the set tension, and the furnace temperature of the annealing furnace is adjusted; wherein the increased tension is not greater than the preset tension limit value of the corresponding furnace section; The annealing temperature of the lower strip is determined according to the yield property of the upper strip to prevent the strip from deviating in the annealing furnace; The annealing temperature of the lower strip is determined according to the yield property of the upper strip, which comprises the following steps: If the yield property of the upper strip only has a yield upper limit, the annealing temperature of the lower strip is controlled to be increased by 30 DEG C on the basis of the annealing temperature of the upper strip; If the yield property of the upper strip only has a yield lower limit, the annealing temperature of the lower strip is controlled to be decreased by 15 DEG C on the basis of the annealing temperature of the upper strip; If the yield property of the upper strip has a yield upper limit and a yield lower limit, the annealing temperature of the lower strip is controlled to be x-10 DEG C to x+10 DEG C, wherein x is the annealing temperature of the upper strip.

2. The method of claim 1, wherein, The adjustment of the furnace temperature of the annealing furnace comprises the following steps: The furnace temperature of the annealing furnace is detected in real time by scanning a pyrometer, and if the furnace temperature is lower than a preset temperature, the furnace temperature of the annealing furnace is controlled to be adjusted upward; If the furnace temperature is higher than the preset temperature, the furnace temperature of the annealing furnace is controlled to be adjusted downward.

3. The method of claim 1, wherein, The method further comprises the following steps: When the upper strip and the lower strip are annealed in the heating section of the annealing furnace, the temperature drop of the upper strip and the lower strip is controlled to be less than or equal to a first preset temperature.

4. The method of claim 3, wherein, The first preset temperature is 20 DEG C.

5. The method of claim 1, wherein, The preset speed is 120 m / min.

6. The method of claim 1, wherein, The annealing furnace comprises a preheating section, a heating section, a soaking section, a cooling section and an equalizing section.

7. A control device for preventing strip steel deviation in a furnace, characterized in that, The device comprises: A first control unit is used to control the annealing speed of the annealing furnace to be less than or equal to a preset speed before the weld joint of the upper strip and the lower strip enters the annealing furnace; A second control unit is used to control the tension of each furnace section of the annealing furnace to be increased by 20% on the basis of the set tension, and adjust the furnace temperature of the annealing furnace; wherein the increased tension is not greater than the preset tension limit value of the corresponding furnace section; A determination unit is used to determine the annealing temperature of the lower strip according to the yield property of the upper strip to prevent the strip from deviating in the annealing furnace; When the determination unit determines the annealing temperature of the lower strip according to the yield property of the upper strip, it is used to: If the yield property of the upper strip only has a yield upper limit, the annealing temperature of the lower strip is controlled to be increased by 30 DEG C on the basis of the annealing temperature of the upper strip; If the yield property of the upper strip only has a yield lower limit, the annealing temperature of the lower strip is controlled to be decreased by 15 DEG C on the basis of the annealing temperature of the upper strip; If the yield property of the previous strip steel has a yield upper limit and a yield lower limit, the annealing temperature of the next strip steel is controlled to be x-10℃ to x+10℃, wherein x is the annealing temperature of the previous strip steel.

8. A computer-readable storage medium, characterized in that, The computer readable storage medium stores at least one program code, and the at least one program code is loaded and executed by the processor to implement the operations performed by the method according to any one of claims 1 to 6. 9.An electronic device comprising a memory and a processor, the memory storing a computer program, wherein, The processor executes the computer program to implement the operations performed by the method according to any one of claims 1 to 6.

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