Pipeline steel finishing mill group, control method and device thereof and medium
By differentiating the opening sequence and water volume of the cooling water manifolds of the upper and lower work rolls in the pipeline steel finishing mill, the problem of head lifting during pipeline steel rolling was solved, and the rolling stability and equipment safety were improved.
Patent Information
- Application Number
- CN202511663614.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-13
- Publication Date
- 2026-01-09
AI Technical Summary
Pipeline steel is prone to the problem of slab head lifting during the rolling process, which can prevent the finishing mill stand from biting in and even cause serious accidents.
By controlling the opening sequence and water volume of the cooling water manifolds of the upper and lower working rollers, the friction coefficient can be differentiated and controlled. The tribological and thermodynamic principles work together to suppress the head-lifting phenomenon.
It effectively improved the problem of head warping in pipeline steel slabs, enhanced rolling stability, and avoided equipment collisions and quality defects.
Smart Images
Figure CN121289255A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of pipeline steel rolling control technology, and in particular relates to a pipeline steel finishing mill and its control method, device and medium. Background Technology
[0002] Pipeline steel is a special type of steel widely used in oil and gas pipeline transportation. It is characterized by high alloy content, high corrosivity, and high hardness. In actual production, pipeline steel often suffers from severe head-up problems, which gradually worsen during rolling. This can easily cause the finishing mill stands to fail to engage, and in severe cases, it can even overturn the finishing mill inlet guide, causing serious accidents. Summary of the Invention
[0003] The embodiments of this application provide a pipeline steel finishing mill and its control method, apparatus and medium, which can at least to some extent improve the problem of head warping of pipeline steel slabs.
[0004] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.
[0005] The first aspect of this application provides a control method for a pipeline steel finishing mill, the finishing mill comprising a plurality of finishing mill stands arranged sequentially along the conveying direction of the pipeline steel slab, each finishing mill stand comprising a work roll group disposed at the entrance of the stand, the work roll group comprising an upper work roll and a lower work roll disposed on opposite sides of the slab conveyor belt, the upper work roll being provided with a first roll gap cooling water manifold and a first roll cooling water manifold, the lower work roll being provided with a second roll gap cooling water manifold and a second roll cooling water manifold, the method comprising: After a first time elapsed from the initial moment when the pipeline steel slab enters the work roll group, the cooling water manifold of the second roll is controlled to open; and / or Before the pipeline steel slab enters the work roll group, the second roll gap cooling water manifold is opened, and after a second time elapses from the starting moment when the pipeline steel slab enters the work roll group, the first roll gap cooling water manifold is opened.
[0006] Optionally, the step of controlling the opening of the second roller cooling water manifold after a first time elapses from the initial moment when the pipeline steel slab enters the work roll group includes: After a first time elapses since the start of the pipeline steel slab entering the work roll group, the cooling water manifolds of the first and second rolls are opened.
[0007] Optionally, the first duration is 1 second to 3 seconds, and the second duration is 2 seconds to 3 seconds.
[0008] Optionally, after controlling the opening of the second roll gap cooling water manifold before the pipeline steel slab enters the work roll group, and after controlling the opening of the first roll gap cooling water manifold after a second time elapses from the starting moment when the pipeline steel slab enters the work roll group, the method further includes: The second roll gap cooling water manifold is controlled to output a first water volume, and the first roll gap cooling water manifold is controlled to output a second water volume, wherein the first water volume is greater than the second water volume.
[0009] Optionally, the first duration is determined based on the following method: Obtain the slab properties of the pipeline steel and the initial roughness of the work roll set, wherein the slab properties include at least: steel grade strength, target thickness reduction rate and rolling speed; The slab properties of the pipeline steel and the initial roughness of the work roll group are input into the dynamic friction model to output the minimum friction coefficient required for the work roll group to bite the slab. The dynamic friction model is obtained by training the network to be trained based on historical sample data, which includes historical slab data, historical roughness of the work roll group, and minimum friction coefficient label. Based on a preset correspondence, the first duration corresponding to the minimum friction coefficient is determined.
[0010] Optionally, at least some of the finishing mill stands correspond to different first durations, and / or at least some of the finishing mill stands correspond to different second durations.
[0011] Optionally, at least one of the plurality of finishing mill stands is a first finishing mill stand, and at least one of the plurality of finishing mill stands is a second finishing mill stand. In the conveying direction of the slab along the pipeline steel, the first finishing mill stand is located before the second finishing mill stand. The method further includes: The first finishing mill stand is controlled to roll the slab of the pipeline steel according to the first rolling force; The second finishing mill stand is controlled to roll the slab of the pipeline steel according to a second rolling force, wherein the second rolling force is greater than the first rolling force.
[0012] A second aspect of this application provides a control device for a pipeline steel finishing mill. The finishing mill includes multiple finishing mill stands arranged sequentially along the conveying direction of the pipeline steel slab. Each finishing mill stand includes a work roll group disposed at the entrance of the stand. The work roll group includes an upper work roll and a lower work roll disposed on opposite sides of the slab conveyor belt. The upper work roll is provided with a first roll gap cooling water manifold and a first roll cooling water manifold, and the lower work roll is provided with a second roll gap cooling water manifold and a second roll cooling water manifold. The device includes: A first control unit is configured to control the opening of the second roller cooling water manifold after a first time elapses from the initial moment when the pipeline steel slab enters the work roll group; and / or The second control unit is configured to control the opening of the second roll gap cooling water manifold before the slab of the pipeline steel enters the work roll group, and to control the opening of the first roll gap cooling water manifold after a second time period elapsed from the starting moment when the slab of the pipeline steel enters the work roll group.
[0013] A third aspect of this application provides a pipeline steel finishing mill, including a controller and a plurality of finishing mill stands arranged sequentially along the conveying direction of the pipeline steel slab. Each finishing mill stand includes a work roll group disposed at the entrance of the stand. The work roll group includes an upper work roll and a lower work roll disposed on opposite sides of the slab conveyor belt. The upper work roll is provided with a first roll gap cooling water manifold and a first roll cooling water manifold, and the lower work roll is provided with a second roll gap cooling water manifold and a second roll cooling water manifold. The controller is used to execute the method as described in any of the first aspects.
[0014] A fourth aspect of this application provides a computer-readable storage medium storing at least one computer program instruction, which is loaded and executed by a processor to perform the operations as described in any of the methods in the first aspect.
[0015] A fifth aspect of this application provides an electronic device including one or more processors and one or more memories, wherein at least one piece of program code is stored in the one or more memories, and the at least one piece of program code is loaded and executed by the one or more processors to perform the operation as described in any of the methods in the first aspect.
[0016] The one or more technical solutions provided in the embodiments of the present invention achieve at least the following technical effects or advantages: The pipeline steel finishing mill control method of this application embodiment includes a finishing mill unit comprising multiple finishing mill stands arranged sequentially along the conveying direction of the pipeline steel slab. Each finishing mill stand includes a work roll group arranged at the entrance of the stand. The work roll group includes an upper work roll and a lower work roll arranged on opposite sides of the slab conveyor belt. The upper work roll is provided with a first roll gap cooling water manifold and a first roll cooling water manifold, and the lower work roll is provided with a second roll gap cooling water manifold and a second roll cooling water manifold. The method includes: controlling the second roll cooling water manifold to open after a first time elapsed from the initial moment when the pipeline steel slab enters the work roll group; and / or controlling the second roll gap cooling water manifold to open before the pipeline steel slab enters the work roll group, and controlling the first roll gap cooling water manifold to open after a second time elapsed from the initial moment when the pipeline steel slab enters the work roll group. Therefore, the embodiments of this application improve the problem of the head of the pipeline steel slab warping to a certain extent by differentiating the opening sequence of the upper and lower roller gap cooling water manifolds and / or by delaying the opening of the lower working roll's roller cooling water manifold after it bites the steel.
[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description
[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings: Figure 1 A structural diagram of a pipeline steel finishing mill unit according to an embodiment of this application is shown; Figure 2 A flowchart of a pipeline steel finishing mill control method according to an embodiment of this application is shown; Figure 3 A structural diagram of the pipeline steel finishing mill control device according to an embodiment of this application is shown; Figure 4 A structural block diagram of a pipeline steel finishing mill unit according to an embodiment of this application is shown; Figure 5 A schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application is shown. Detailed Implementation
[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0020] 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.
[0021] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different models and / or processor devices and / or microcontroller devices.
[0022] 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.
[0023] It should also 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.
[0024] Pipeline steel is a special type of steel widely used in oil and gas pipeline transportation. It is characterized by high alloy content, high corrosion resistance, and high hardness. In actual production, pipeline steel often suffers from severe head-up problems, which gradually worsen during rolling. This can easily cause the finishing mill stands to fail to engage, and in severe cases, it can even overturn the finishing mill inlet guide, resulting in serious accidents.
[0025] In view of this, this application provides a control method for a pipeline steel finishing mill, which can at least improve the problem of the head warping of pipeline steel slabs to a certain extent.
[0026] The control method for pipeline steel finishing mills according to embodiments of this application will now be described with reference to the accompanying drawings.
[0027] Figure 1 A structural diagram of a pipeline steel finishing mill unit according to an embodiment of this application is shown.
[0028] In some embodiments, the finishing mill unit includes a plurality of finishing mill stands 5 arranged sequentially along the conveying direction of the slab of the pipeline steel. Each finishing mill stand 5 includes a work roll group 9 arranged at the entrance of the stand. The work roll group 9 includes an upper work roll 91 and a lower work roll 92 arranged on opposite sides of the slab conveyor belt. The upper work roll 91 is provided with a first roll gap cooling water manifold 61 and a first roll cooling water manifold 71. The lower work roll 92 is provided with a second roll gap cooling water manifold 62 and a second roll cooling water manifold 72.
[0029] It is understood that the finishing mill stand 5 also includes a work roll group 9 set at the stand exit. The work roll group 9 includes an upper work roll 91 and a lower work roll 92 set on opposite sides of the slab conveyor belt. The upper work roll 91 is provided with a first roll cooling water manifold 71 and a second roll cooling water manifold 72.
[0030] In the pipeline steel preparation process, continuous casting billets can be obtained by smelting molten steel. The continuous casting billets are heated in the hot continuous rolling production line to obtain slab 1. Slab 1 is rolled by roughing mill 2 to obtain intermediate billet 3. Intermediate billet 3 enters the finishing mill through delay roller table 4.
[0031] Understandably, during the production process of a hot strip finishing mill, each stand is equipped with cooling water manifolds for the work rolls on both the inlet and outlet sides to control the roll temperature and ensure the surface quality of the strip. However, during rolling, the significant difference in cooling water behavior between the upper and lower work rolls can easily lead to strip tipping. Specifically, the lower work roll typically rotates clockwise, and the high-speed rotating roll surface carries a large amount of cooling water from the inlet side into the roll gap area, forming a continuous water film on the roll surface. This continuous water film reduces the coefficient of friction between the lower work roll and the lower surface of the strip. In contrast, although the upper work roll also has cooling water spray, due to gravity, the water flow tends to fall vertically, making it difficult for the rotating roll surface to effectively carry the water and form a uniform water film. Therefore, the coefficient of friction between the upper work roll and the upper surface of the strip remains relatively high. The difference in friction coefficients between the upper and lower work rolls results in an uneven frictional force on the upper and lower surfaces of the strip during rolling. The lower surface, with its lower friction coefficient, tends to slide forward more easily, while the upper surface, with its higher friction, lags behind, creating a torque effect that significantly exacerbates the strip head tilting phenomenon after exiting the rolls. Understandably, if this tilting phenomenon is not controlled, it will not only affect rolling stability but may also cause the strip head to impact the equipment and produce quality defects such as folding. Therefore, in actual production, it is necessary to adjust this phenomenon by optimizing the cooling water spray strategy.
[0032] Figure 2 A flowchart of a pipeline steel finishing mill control method according to an embodiment of this application is shown.
[0033] The first aspect of this application provides a control method for a pipeline steel finishing mill, the method including but not limited to: Step S101. After a first time elapsed from the initial moment when the pipeline steel slab enters the work roll group, control the second roll cooling water manifold to open; and / or Step S102. Before the slab of the pipeline steel enters the working roll group, control the second roll gap cooling water manifold to open, and after a second time period has elapsed from the starting moment when the slab of the pipeline steel enters the working roll group, control the first roll gap cooling water manifold to open.
[0034] It is understood that, in some embodiments, only the second roll cooling water manifold may be opened after a first duration has elapsed since the start of the pipeline steel slab entering the work roll group. In other embodiments, the second roll gap cooling water manifold may be opened before the pipeline steel slab enters the work roll group, and the first roll gap cooling water manifold may be opened after a second duration has elapsed since the start of the pipeline steel slab entering the work roll group. In still other embodiments, the second roll cooling water manifold may be opened after a first duration has elapsed since the start of the pipeline steel slab entering the work roll group; and the second roll gap cooling water manifold may be opened before the pipeline steel slab enters the work roll group, and the first roll gap cooling water manifold may be opened after a second duration has elapsed since the start of the pipeline steel slab entering the work roll group.
[0035] Therefore, this embodiment of the application avoids a significant difference in friction coefficient between the lower work roll and the upper work roll due to premature cooling of the lower roll at the moment of biting, by delaying the opening of the second roll cooling water manifold after the steel bites. This asymmetry in friction conditions easily causes the strip head to curl upwards. Delayed cooling ensures the relative balance of friction between the upper and lower rolls during the initial biting stage, reducing the force of curling. In addition, opening the second roll gap cooling water manifold in advance before rolling and then opening the first roll gap cooling water manifold after a second delay after the steel bites creates an asymmetric temperature field. This causes the lower surface of the strip to cool down before contacting the work rolls, increasing the deformation, while the upper surface maintains a higher temperature, reducing the deformation. During rolling, this temperature difference between the upper and lower surfaces causes the deformation of the lower surface to be greater than that of the upper surface, thereby generating a torque that suppresses head curling and actively corrects it. Thus, this embodiment of the application effectively suppresses head curling in pipeline steel rolling by controlling the cooling sequence and utilizing the principles of tribology and thermodynamics in a synergistic effect.
[0036] In some embodiments, controlling the opening of the second roller cooling water manifold after a first time elapses from the initial moment when the pipeline steel slab enters the work roll group includes: After a first time elapses since the start of the pipeline steel slab entering the work roll group, the cooling water manifolds of the first and second rolls are opened.
[0037] It is understandable that if the cooling water manifold of the first roller is opened too early, the hot strip surface will experience an excessive temperature drop due to rapid cooling, which will increase its deformation. This contradicts the aforementioned requirement to increase the deformation of the lower surface of the strip and reduce the deformation of the upper surface. Therefore, in order to ensure that the deformation of the lower surface of the strip is increased and the deformation of the upper surface is reduced, the cooling water manifold of the first roller is also opened only after the first time after the strip bites.
[0038] In some embodiments, the first duration is 1 second to 3 seconds, for example, the first duration can be 1 second, 2 seconds, or 3 seconds, and the second duration is 2 seconds to 3 seconds, for example, the second duration can be 2 seconds or 3 seconds.
[0039] In some embodiments, the method further includes opening the second roll gap cooling water manifold before the pipeline steel slab enters the work roll group, and opening the first roll gap cooling water manifold after a second time elapses from the start time of the pipeline steel slab entering the work roll group. The second roll gap cooling water manifold is controlled to output a first water volume, and the first roll gap cooling water manifold is controlled to output a second water volume, wherein the first water volume is greater than the second water volume.
[0040] Understandably, by setting the first water volume (lower roll gap cooling) to be greater than the second water volume (upper roll gap cooling), this method further enhances the intensity of asymmetric cooling based on the established timing control, thereby regulating the temperature difference between the upper and lower surfaces of the strip. The larger first water volume intensifies the cooling intensity on the lower surface of the strip, causing its temperature to drop further and increasing its deformation. Conversely, the smaller second water volume limits the cooling effect on the upper surface, effectively slowing down the temperature drop rate and thus reducing the deformation.
[0041] In some embodiments, the first duration is determined based on the following: Step S01. Obtain the slab properties of the pipeline steel and the initial roughness of the work roll set, wherein the slab properties include at least: steel grade strength, target thickness reduction rate and rolling speed; Understandably, among the slab properties, the steel grade strength determines the resistance to rolling deformation; higher strength requires greater bite friction. The target thickness reduction rate reflects the intensity of single-pass rolling; a larger reduction rate results in a longer contact arc between the rolls and the slab, higher total pressure, and a corresponding increase in the demand for the friction coefficient. Rolling speed affects friction by altering the lubrication state and strain rate in the deformation zone. High-speed rolling causes significant changes in oil film thickness and interface temperature, potentially leading to dynamic fluctuations in the friction coefficient. Simultaneously, the initial roughness of the work roll set is a key surface condition determining mechanical bite capability, and its degree of attenuation directly affects the upper limit of the friction coefficient supply. This step, through multi-dimensional data acquisition, lays a reliable data foundation for subsequent calculations of friction requirements.
[0042] Step S02. Input the slab properties of the pipeline steel and the initial roughness of the work roll group into the dynamic friction model to output the minimum friction coefficient required for the work roll group to bite the slab. The dynamic friction model is obtained by training the network to be trained based on historical sample data, which includes historical slab data, historical roughness of the work roll group, and minimum friction coefficient label. The dynamic friction model used in this application employs historical sample data (such as actual friction coefficients under different steel grades and processes) to train the network, enabling it to capture the deep, nonlinear mapping relationship between inputs such as strength, thinning rate, speed, and roughness and the minimum friction coefficient. This allows for a more accurate output of the minimum friction coefficient provided by the work roll surface for successful slab engagement without slippage under specific working conditions.
[0043] Step S03. Based on a preset correspondence, determine the first duration corresponding to the minimum friction coefficient.
[0044] Understandably, the preset correspondence is based on a knowledge base derived from a large amount of experimental or production data, establishing a quantitative relationship between the minimum friction coefficient and the first duration. For example, when the model predicts a higher minimum friction coefficient, it means that the original roughness of the lower working roll must be maintained for a longer period of time (i.e., the cooling water must be turned on later) to provide sufficient friction, so the first duration can be set to be longer; if the required friction coefficient is lower, cooling can be turned on earlier.
[0045] In some embodiments, at least some of the finishing mill stands correspond to different first durations, and / or at least some of the finishing mill stands correspond to different second durations.
[0046] Understandably, as rolling progresses, the strip thickness decreases, the temperature drops, and the speed increases, thus altering the requirements for deformation resistance and the coefficient of friction. The front stands may need to focus more on bite stability, hence the shorter initial cooling time; the rear stands, due to the lower strip temperature and greater tendency for tipping, require earlier or more intensified asymmetric cooling (e.g., adjusting the second cooling time). This differentiated configuration enables stand-level coordinated control of the friction and temperature fields, thereby simultaneously optimizing bite stability and strip shape quality throughout the entire process.
[0047] In some embodiments, at least one of the plurality of finishing mill stands is a first finishing mill stand, and at least one of the plurality of finishing mill stands is a second finishing mill stand. The first finishing mill stand is located before the second finishing mill stand in the conveying direction of the slab along the pipeline steel. The method further includes: The first finishing mill stand is controlled to roll the slab of the pipeline steel according to the first rolling force; The second finishing mill stand is controlled to roll the slab of the pipeline steel according to a second rolling force, wherein the second rolling force is greater than the first rolling force.
[0048] Understandably, in the front stands, the strip is thicker and at a higher temperature, so a smaller initial rolling force can ensure stable bite and achieve efficient large deformation. As rolling progresses, the strip's resistance to deformation increases due to temperature drop and work hardening. The rear stands apply a larger second rolling force to overcome the increasing resistance and ensure effective thinning and precise shape control in subsequent passes.
[0049] Based on the above disclosure, the pipeline steel finishing mill control method of this application includes a finishing mill comprising multiple finishing mill stands arranged sequentially along the conveying direction of the pipeline steel slab. Each finishing mill stand includes a work roll group disposed at the entrance of the stand. The work roll group includes an upper work roll and a lower work roll disposed on opposite sides of the slab conveyor belt. The upper work roll is provided with a first roll gap cooling water manifold and a first roll cooling water manifold, and the lower work roll is provided with a second roll gap cooling water manifold and a second roll cooling water manifold. The method includes: controlling the second roll cooling water manifold to open after a first time elapsed from the initial moment when the pipeline steel slab enters the work roll group; and / or controlling the second roll gap cooling water manifold to open before the pipeline steel slab enters the work roll group, and controlling the first roll gap cooling water manifold to open after a second time elapsed from the initial moment when the pipeline steel slab enters the work roll group. Therefore, the embodiments of this application improve the problem of the head of the pipeline steel slab warping to a certain extent by differentiating the opening sequence of the upper and lower roller gap cooling water manifolds and / or by delaying the opening of the lower working roll's roller cooling water manifold after it bites the steel.
[0050] Figure 3 A structural diagram of the pipeline steel finishing mill control device according to an embodiment of this application is shown.
[0051] A second aspect of this application provides a control device 200 for a pipeline steel finishing mill. The finishing mill includes multiple finishing mill stands arranged sequentially along the conveying direction of the pipeline steel slab. Each finishing mill stand includes a work roll group disposed at the entrance of the stand. The work roll group includes an upper work roll and a lower work roll disposed on opposite sides of the slab conveyor belt. The upper work roll is provided with a first roll gap cooling water manifold and a first roll cooling water manifold, and the lower work roll is provided with a second roll gap cooling water manifold and a second roll cooling water manifold. The device 200 includes: The first control unit 201 is configured to control the opening of the second roller cooling water manifold after a first time elapses from the initial moment when the pipeline steel slab enters the work roll group; and / or The second control unit 202 is used to control the opening of the second roll gap cooling water manifold before the slab of the pipeline steel enters the work roll group, and to control the opening of the first roll gap cooling water manifold after a second time period has elapsed from the starting time of the slab of the pipeline steel entering the work roll group.
[0052] Figure 4 A structural block diagram of a pipeline steel finishing mill unit according to an embodiment of this application is shown.
[0053] A third aspect of this application provides a pipeline steel finishing mill, including a controller 20 and a plurality of finishing mill stands 10 arranged sequentially along the conveying direction of the pipeline steel slab. Each finishing mill stand 10 includes a work roll group disposed at the stand entrance. The work roll group includes an upper work roll and a lower work roll disposed on opposite sides of the slab conveyor belt. The upper work roll is provided with a first roll gap cooling water manifold and a first roll cooling water manifold, and the lower work roll is provided with a second roll gap cooling water manifold and a second roll cooling water manifold. The controller 10 is used to execute the method as described in any of the first aspects.
[0054] A fourth aspect of this application provides a computer-readable storage medium storing at least one computer program instruction, which is loaded and executed by a processor to perform the operations as described in any of the methods in the first aspect.
[0055] Computer-readable storage media may be portable compact disc read-only memory (CD-ROM) and include program code, and may run on a terminal device, such as a personal computer. However, the computer-readable storage medium of this application is not limited thereto. In this application, the readable storage medium may be any tangible medium that contains or stores a program that may be used by or in conjunction with an instruction execution system, apparatus, or device.
[0056] A readable storage medium may 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 (a non-exhaustive list) of readable storage media include: an electrical connection having one or more wires, a portable disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof.
[0057] Program code for performing the operations of this application can be written in any combination of one or more programming languages, including object-oriented programming languages such as Java and C++, and conventional procedural programming languages such as C or similar languages. The program code can execute entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving remote computing devices, the remote computing device can be connected to the user's computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computing device (e.g., via the Internet using an Internet service provider).
[0058] A fifth aspect of this application provides an electronic device including one or more processors and one or more memories, wherein at least one piece of program code is stored in the one or more memories, and the at least one piece of program code is loaded and executed by the one or more processors to perform the operation as described in any of the methods in the first aspect.
[0059] like Figure 5 As shown, the electronic device 400 is manifested in the form of a general-purpose computing device. The components of the electronic device 400 may include, but are not limited to: at least one processing unit 410, at least one storage unit 420, and a bus 430 connecting different system components (including storage unit 420 and processing unit 410).
[0060] The storage unit stores program code, which can be executed by the processing unit 410, causing the processing unit 410 to perform the steps described in the "Embodiment Method" section above according to various exemplary embodiments of this application.
[0061] Storage unit 420 may include readable media in the form of volatile storage units, such as random access memory (RAM) 421 and / or cache 422, and may further include read-only memory (ROM) 423.
[0062] Storage unit 420 may also include a program / utility 424 having a set (at least one) of program modules 425, such program modules 425 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.
[0063] Bus 430 can represent one or more of several types of bus structures, including a memory cell bus or memory cell controller, a peripheral bus, a graphics acceleration port, a processing unit, or a local bus using any of the various bus structures.
[0064] Electronic device 400 can also communicate with one or more external devices 500 (e.g., keyboard, pointing device, Bluetooth device, etc.), and with one or more devices that enable a user to interact with electronic device 400, and / or with any device that enables electronic device 400 to communicate with one or more other computing devices (e.g., router, modem, etc.). This communication can be performed through I / O (input / output) interface 450, which can also be connected to display unit 440 to display the communication content. Furthermore, electronic device 400 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public network, such as the Internet) through network adapter 460. As shown, network adapter 460 communicates with other modules of electronic device 400 via bus 430. It should be understood that, although not shown in the figures, other hardware and / or software modules can be used in conjunction with electronic device 400, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.
[0065] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this invention and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units can be integrated into a single processing unit, or each unit can exist physically separately, or two or more units can be integrated into a single unit.
[0066] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between units or modules may be electrical or other forms.
[0067] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.
[0068] If the integrated unit is implemented as 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 this 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. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.
[0069] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.
Claims
1. A control method for a pipeline steel finishing mill, characterized in that, The finishing mill unit includes multiple finishing mill stands arranged sequentially along the conveying direction of the slab of the pipeline steel. Each finishing mill stand includes a work roll group located at the entrance of the stand. The work roll group includes an upper work roll and a lower work roll located on opposite sides of the slab conveyor belt. The upper work roll is provided with a first roll gap cooling water manifold and a first roll cooling water manifold. The lower work roll is provided with a second roll gap cooling water manifold and a second roll cooling water manifold. The method includes: After a first time elapsed from the initial moment when the pipeline steel slab enters the work roll group, the cooling water manifold of the second roll is controlled to open; and / or Before the pipeline steel slab enters the work roll group, the second roll gap cooling water manifold is opened, and after a second time elapses from the starting moment when the pipeline steel slab enters the work roll group, the first roll gap cooling water manifold is opened.
2. The method according to claim 1, characterized in that, The step of controlling the opening of the cooling water manifold of the second roller after a first time elapses from the initial moment when the slab of the pipeline steel enters the work roller group includes: After a first time elapses since the start of the pipeline steel slab entering the working roll group, the cooling water manifolds of the first and second rolls are opened.
3. The method according to claim 1, characterized in that, The first duration is 1 second to 3 seconds, and the second duration is 2 seconds to 3 seconds.
4. The method according to claim 1, characterized in that, The method further includes opening the second roll gap cooling water manifold before the pipeline steel slab enters the work roll group, and opening the first roll gap cooling water manifold after a second time elapses from the initial moment the pipeline steel slab enters the work roll group. The second roll gap cooling water manifold is controlled to output a first water volume, and the first roll gap cooling water manifold is controlled to output a second water volume, wherein the first water volume is greater than the second water volume.
5. The method according to claim 1, characterized in that, The first duration is determined based on the following method: Obtain the slab properties of the pipeline steel and the initial roughness of the work roll set, wherein the slab properties include at least: steel grade strength, target thickness reduction rate and rolling speed; The slab properties of the pipeline steel and the initial roughness of the work roll group are input into the dynamic friction model to output the minimum friction coefficient required for the work roll group to bite the slab. The dynamic friction model is obtained by training the network to be trained based on historical sample data, which includes historical slab data, historical roughness of the work roll group, and minimum friction coefficient label. Based on a preset correspondence, the first duration corresponding to the minimum friction coefficient is determined.
6. The method according to claim 1, characterized in that, Of the plurality of finishing mill stands, at least some of the finishing mill stands correspond to different first durations, and / or at least some of the finishing mill stands correspond to different second durations.
7. The method according to claim 1, characterized in that, At least one of the plurality of finishing mill stands is a first finishing mill stand, and at least one of the plurality of finishing mill stands is a second finishing mill stand. In the conveying direction of the slab along the pipeline steel, the first finishing mill stand is located before the second finishing mill stand. The method further includes: The first finishing mill stand is controlled to roll the slab of the pipeline steel according to the first rolling force; The second finishing mill stand is controlled to roll the slab of the pipeline steel according to a second rolling force, wherein the second rolling force is greater than the first rolling force.
8. A control device for a pipeline steel finishing mill, characterized in that, The finishing mill unit includes multiple finishing mill stands arranged sequentially along the conveying direction of the slab of the pipeline steel. Each finishing mill stand includes a work roll group located at the entrance of the stand. The work roll group includes an upper work roll and a lower work roll located on opposite sides of the slab conveyor belt. The upper work roll is provided with a first roll gap cooling water manifold and a first roll cooling water manifold. The lower work roll is provided with a second roll gap cooling water manifold and a second roll cooling water manifold. The device includes: A first control unit is configured to control the opening of the second roller cooling water manifold after a first time elapses from the initial moment when the pipeline steel slab enters the work roll group; and / or The second control unit is configured to control the opening of the second roll gap cooling water manifold before the slab of the pipeline steel enters the work roll group, and to control the opening of the first roll gap cooling water manifold after a second time period elapsed from the starting moment when the slab of the pipeline steel enters the work roll group.
9. A pipeline steel finishing mill, characterized in that, The device includes a controller and a plurality of finishing mill stands arranged sequentially along the conveying direction of the slab of the pipeline steel. Each finishing mill stand includes a work roll group located at the entrance of the mill stand. The work roll group includes an upper work roll and a lower work roll located on opposite sides of the slab conveyor belt. The upper work roll is provided with a first roll gap cooling water manifold and a first roll cooling water manifold. The lower work roll is provided with a second roll gap cooling water manifold and a second roll cooling water manifold. The controller is used to execute the method as described in any one of claims 1-7.
10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one computer program instruction, which is loaded and executed by a processor to perform the operation as described in any one of claims 1-7.