Method, device and equipment for designing a scheme of rolling an intermediate blank in a wide plate production line

Abstract

The application provides a kind of intermediate blank rolling scheme design method, device and equipment of wide and thick plate production line, it is related to intermediate blank rolling technical field, including: obtaining time information and rolling information;With intermediate blank handling time as the sum of intermediate blank transport time and intermediate blank rolling time;If intermediate blank cooling time is less than intermediate blank handling time, then with the sum of intermediate blank length, plate length, rough rolling machine distance, finishing mill distance and intermediate blank safety distance as minimum roller distance;According to the first intermediate blank rolling scheme of minimum roller distance;If intermediate blank cooling time is greater than or equal to intermediate blank handling time, then compare the size of current roller distance and the sum of minimum roller distance and intermediate blank length, according to the comparison result to obtain second intermediate blank rolling scheme and third intermediate blank rolling scheme.The application realizes the premise of guaranteeing intermediate blank timely cooling to improve rolling mill utilization.

Description

Technical Field

[0001] This invention relates to the field of intermediate billet rolling technology, and more specifically, to a design method, apparatus and equipment for intermediate billet rolling scheme of a wide and thick plate production line. Background Technology

[0002] The distance between the roughing mill and the finishing mill in a heavy plate production line is usually determined based on the production line layout and process requirements. The intermediate billet obtained after the slab has completed forming rolling and widening rolling on the roughing mill will not directly enter the finishing mill for finishing rolling. Instead, it will wait and oscillate on the roller table between the roughing mill and the finishing mill for a period of time. When the temperature of the intermediate billet drops to the starting rolling temperature of finishing rolling, it will then enter the finishing mill for finishing rolling.

[0003] In existing intermediate billet rolling schemes, the number of intermediate billets placed on the roller table is often determined by the experience of technicians. However, due to the limited length of the intermediate roller table, placing too many intermediate billets can lead to untimely cooling and may also cause disruption of the rolling rhythm. Placing too few intermediate billets will result in wasted capacity and reduced mill utilization. Summary of the Invention

[0004] The present invention aims to solve at least one of the above-mentioned problems.

[0005] To address the aforementioned problems, this invention provides a design method, apparatus, and electronic equipment for intermediate billet rolling in a heavy plate production line.

[0006] In a first aspect, the present invention provides a method for designing an intermediate billet rolling scheme for a heavy plate production line, comprising: Acquire time information and rolling information, wherein the time information includes intermediate billet cooling time, intermediate billet transport time and intermediate billet rolling time, and the rolling information includes intermediate billet length, plate length, roughing mill throwing distance, finishing mill throwing distance and intermediate billet safety distance; The sum of the intermediate billet transport time and the intermediate billet rolling time is taken as the intermediate billet processing time; If the cooling time of the intermediate billet is less than the processing time of the intermediate billet, then the sum of the length of the intermediate billet, the length of the plate, the steel throwing distance of the roughing mill, the steel throwing distance of the finishing mill, and the safety distance of the intermediate billet shall be taken as the minimum roller table distance; The rolling scheme for the first intermediate billet is obtained based on the minimum roller table distance; If the intermediate billet cooling time is greater than or equal to the intermediate billet processing time, then the sum of the current roller table distance and the minimum roller table distance and the intermediate billet length is compared to obtain the comparison result; Based on the comparison results, the intermediate billet cooling time, the intermediate billet transport time, the intermediate billet rolling time, the current roller table distance, the minimum roller table distance, the intermediate billet length, and the intermediate billet safety distance, a second intermediate billet rolling scheme and a third intermediate billet rolling scheme are obtained.

[0007] Optionally, obtaining the second and third intermediate billet rolling schemes based on the comparison results, the intermediate billet cooling time, the intermediate billet transport time, the intermediate billet rolling time, the current roller table distance, the minimum roller table distance, the intermediate billet length, and the intermediate billet safety distance includes: The quantity of the first intermediate billet is obtained based on the intermediate billet cooling time, the intermediate billet transport time, and the intermediate billet rolling time; When the current roller table distance is less than the sum of the minimum roller table distance and the length of the intermediate billet, the second intermediate billet rolling scheme is obtained based on the number of the first intermediate billets; When the current roller table distance is greater than or equal to the sum of the minimum roller table distance and the intermediate billet length, the number of second intermediate billets is obtained based on the current roller table distance, the minimum roller table distance, the intermediate billet length, and the intermediate billet safety distance. The rolling scheme for the third intermediate billet is obtained based on the number of the first intermediate billet and the number of the second intermediate billet.

[0008] Optionally, obtaining the number of first intermediate billets based on the intermediate billet cooling time, the intermediate billet transport time, and the intermediate billet rolling time includes: The quantity of the first intermediate billet is obtained based on the intermediate billet cooling time, the intermediate billet transport time, and the intermediate billet rolling time. The quantity of the first intermediate billet includes: N1=INT((Δts-Δtt) / Δtf), Where N1 is the number of the first intermediate billets, INT() is the integer sign, Δts is the cooling time of the intermediate billets, Δtt is the transport time of the intermediate billets, and Δtf is the rolling time of the intermediate billets.

[0009] Optionally, obtaining the number of second intermediate billets based on the current roller table distance, the minimum roller table distance, the intermediate billet length, and the intermediate billet safety distance includes: The quantity of the second intermediate billet is obtained based on the current roller table distance, the minimum roller table distance, the intermediate billet length, and the intermediate billet safety distance; The quantity of the second intermediate billet includes: N2=INT((L-Lmin) / (L1+S)), Where N2 is the number of the second intermediate billets, INT() is the integer sign, L is the current roller table distance, Lmin is the minimum roller table distance, L1 is the length of the intermediate billet, and S is the safety distance of the intermediate billet.

[0010] Optionally, obtaining the rolling scheme for the third intermediate billet based on the quantity of the first intermediate billet and the quantity of the second intermediate billet includes: The target number of intermediate billets is obtained based on the number of the first intermediate billets and the number of the second intermediate billets. The number of target intermediate blanks includes: N = MIN(N1, N2), Where N is the target number of intermediate billets, MIN() is the sign of the smaller value between N1 and N2, where N1 is the number of the first intermediate billets and N2 is the number of the second intermediate billets; The rolling scheme for the third intermediate billet is obtained based on the target number of intermediate billets.

[0011] Optionally, the step of using the sum of the intermediate billet length, the plate length, the roughing mill throwing distance, the finishing mill throwing distance, and the intermediate billet safety distance as the minimum roller table distance includes: The minimum roller table distance is the sum of the intermediate billet length, the plate length, the roughing mill throwing distance, the finishing mill throwing distance, and the intermediate billet safety distance. The minimum roller conveyor distance includes: Lmin = L1 + L2 + S + a1 + a2, Wherein, Lmin is the minimum roller table distance, L1 is the length of the intermediate billet, L2 is the length of the plate, S is the safety distance of the intermediate billet, a1 is the steel throwing distance of the roughing mill, and a2 is the steel throwing distance of the finishing mill.

[0012] Optionally, obtaining the time information includes: Obtain the cooling mode, wherein the cooling mode includes air cooling mode and water cooling mode; The cooling time of the intermediate billet is obtained through the cooling mode.

[0013] Secondly, the present invention provides a design device for intermediate billet rolling scheme of a heavy plate production line, comprising: an information acquisition module for acquiring time information and rolling information, wherein the time information includes intermediate billet cooling time, intermediate billet transport time and intermediate billet rolling time, and the rolling information includes intermediate billet length, plate length, roughing mill throwing distance, finishing mill throwing distance and intermediate billet safety distance; The intermediate billet processing time acquisition module is used to take the sum of the intermediate billet transport time and the intermediate billet rolling time as the intermediate billet processing time; The minimum roller table distance acquisition module is used to take the sum of the intermediate billet length, the plate length, the roughing mill throwing distance, the finishing mill throwing distance, and the intermediate billet safety distance as the minimum roller table distance if the intermediate billet cooling time is less than the intermediate billet processing time. The first rolling scheme acquisition module is used to obtain the first intermediate billet rolling scheme based on the minimum roller table distance; The comparison module is used to compare the current roller table distance with the sum of the minimum roller table distance and the length of the intermediate billet if the intermediate billet cooling time is greater than or equal to the intermediate billet processing time, and obtain a comparison result. The second rolling scheme acquisition module is used to obtain a second intermediate billet rolling scheme and a third intermediate billet rolling scheme based on the comparison results, the intermediate billet cooling time, the intermediate billet transport time, the intermediate billet rolling time, the current roller table distance, the minimum roller table distance, the intermediate billet length, and the intermediate billet safety distance.

[0014] Thirdly, the present invention provides an electronic device, including a memory and a processor; The memory is used to store computer programs; The processor is configured to, when executing the computer program, implement the intermediate billet rolling scheme design method for the heavy plate production line as described in the first aspect.

[0015] Fourthly, the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the intermediate billet rolling scheme design method for a heavy plate production line as described in the first aspect.

[0016] The beneficial effects of the design method, apparatus, and electronic equipment for the intermediate billet rolling scheme of the heavy plate production line of the present invention are as follows: It comprehensively considers time information and rolling information. The time information includes the intermediate billet cooling time, intermediate billet transport time, and intermediate billet rolling time. The rolling information includes the intermediate billet length, plate length, roughing mill throwing distance, finishing mill throwing distance, and intermediate billet safety distance, laying the foundation for subsequent scheme design. The sum of the intermediate billet transport time and intermediate billet rolling time is taken as the intermediate billet processing time. By calculating and comparing the intermediate billet cooling time and intermediate billet processing time, it is determined whether each intermediate billet needs to be oscillated on the roller table to maintain its temperature, avoiding high-temperature billets entering the finishing mill due to insufficient cooling, and ensuring that the intermediate billet temperature at the finishing mill inlet is within the optimal range. If the intermediate billet cooling time is less than the intermediate billet processing time, the minimum roller table distance is calculated. The first intermediate billet rolling scheme is obtained through the minimum roller table distance, ensuring that all intermediate billets can pass smoothly without blockage, avoiding unnecessary downtime. If the intermediate billet cooling time is greater than or equal to the intermediate billet processing time, then the sum of the current roller table distance and the minimum roller table distance with the intermediate billet length is further compared. Based on the specific circumstances, a second and third intermediate billet rolling scheme are formulated. This allows the production line to adapt to changing working conditions and improves mill utilization while ensuring timely cooling of the intermediate billet. Attached Figure Description

[0017] Figure 1 This is a flowchart illustrating a method for designing an intermediate billet rolling scheme in a wide and thick plate production line according to an embodiment of the present invention. Figure 2 This is a schematic diagram of a wide and thick plate production line according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a design device for an intermediate billet rolling scheme in a wide and thick plate production line according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0018] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Although some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0019] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.

[0020] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the description below. It should be noted that the concepts of "first," "second," etc., mentioned in this invention are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0021] It should be noted that the terms "one" and "more" used in this invention are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0022] The names of the messages or information exchanged between the multiple devices in the embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0023] In related technologies, the layout of a heavy plate production line from the heating furnace to the rolling area includes a heating furnace, a high-pressure water descaling mill, a roughing mill, and a finishing mill. The slab is heated in the heating furnace. Once it reaches the temperature set by the process, the tapping machine pulls the slab from the heating furnace onto the rolling line. The slab is then transported via roller conveyor to the high-pressure water descaling mill for descaling, removing the iron oxide generated during heating to obtain plates with excellent surface quality in subsequent rolling processes. After high-pressure water descaling, the slab is transported via roller conveyor to the roughing mill, where it undergoes forming rolling and widening rolling according to the process specifications. The starting rolling temperature, reduction per pass, and rolling speed of the roughing rolling process are determined according to a set program. After being rolled by the roughing mill, the slab becomes an intermediate billet, which is then transported via roller conveyor to the finishing mill for finishing rolling. The starting rolling temperature, reduction per pass, and rolling speed of the finishing mill are determined according to a set program. The intermediate billet, transported to the finishing mill via roller conveyor, is typically at a higher temperature than the initial finishing temperature. It does not directly enter the finishing mill for finishing rolling; instead, it oscillates on the roller conveyor between the roughing and finishing mills for a period, allowing its temperature to drop to the finishing mill's initial temperature before entering for finishing. Because the temperature decrease during this oscillation is achieved through convection with air and thermal radiation, the rate of temperature reduction is slow and typically takes a longer time. This oscillation time is usually greater than the finishing rolling time on the finishing mill itself.

[0024] To address the problems existing in the aforementioned related technologies, this embodiment provides a design method, apparatus, and equipment for intermediate billet rolling in a heavy plate production line.

[0025] like Figure 1 As shown in the embodiment of the present invention, a method for designing an intermediate billet rolling scheme for a wide and thick plate production line includes: Step 1100: Obtain time information and rolling information, wherein the time information includes intermediate billet cooling time, intermediate billet transport time and intermediate billet rolling time, and the rolling information includes intermediate billet length, plate length, roughing mill throwing distance, finishing mill throwing distance and intermediate billet safety distance.

[0026] Specifically, in combination Figure 2As shown, F´CE is the heating furnace, HSB is the high-pressure water descaling machine, R is the roughing mill, and F is the finishing mill. The heating furnace's main function is to heat the continuously cast billet or ingot to a suitable rolling temperature (usually 1150~1250℃) to improve the steel's plasticity and deformability, and reduce its deformation resistance. The high-pressure water descaling machine is used to remove the iron oxide scale (i.e., "scale") from the surface of the billet before hot rolling. If this scale is not removed in time, it will affect the surface quality and dimensional accuracy of the finished steel plate, and may even damage the rolls. The length of the intermediate billet in the last pass of roughing rolling (i.e., the intermediate billet oscillating on the roller table between the roughing and finishing mills) is L1, the length of the plate in the penultimate pass of finishing rolling is L2, the steel throwing distance of the roughing mill is a1, the steel throwing distance of the finishing mill is a2, and the safe distance for the intermediate billet oscillating on the roller table is S. Rolling of slabs of the same specification refers to adjacent slabs made of the same material, with identical roughing passes, reduction per pass, speed, temperature, total time, and intermediate slab length. The finishing mill's starting temperature, number of finishing passes, reduction per pass, speed, and total time are also identical. The time required for the intermediate slab to reach the finishing mill's starting temperature FET from the final roughing pass's exit temperature RDT via air cooling is Δts. The time required for the intermediate slab to be transported from the roughing mill to the finishing mill via the roller conveyor is Δtt. The total time required for the intermediate slab to complete rolling on the finishing mill is Δtf. These parameters are determined according to the rolling schedule setting program.

[0027] Step 1200: The sum of the intermediate billet transport time and the intermediate billet rolling time is taken as the intermediate billet processing time.

[0028] Specifically, the intermediate billet processing time = the intermediate billet transport time Δtt required for the intermediate billet to be transported from the roughing mill to the finishing mill via the roller conveyor + the intermediate billet rolling time Δtf required for the intermediate billet to complete rolling on the finishing mill.

[0029] Step 1311: If the cooling time of the intermediate billet is less than the processing time of the intermediate billet, then the sum of the length of the intermediate billet, the length of the plate, the steel throwing distance of the roughing mill, the steel throwing distance of the finishing mill, and the safety distance of the intermediate billet is taken as the minimum roller table distance.

[0030] Specifically, in combination Figure 2 As shown, the distance between the roughing mill and the finishing mill is L. The intermediate billet cooling time Δts required from the roughing mill's final pass exit temperature RDT to the finishing mill's inlet temperature FET via air cooling is less than the intermediate billet transport time Δtt required for the intermediate billet to be transported from the roughing mill to the finishing mill via the roller conveyor, plus the intermediate billet rolling time Δtf required for the intermediate billet to complete rolling on the finishing mill. In this case, there is no intermediate billet waiting to be heated. When there is no intermediate billet waiting to be heated on the rolling line, calculate the minimum required distance between the roughing mill and the finishing mill, i.e., the minimum roller conveyor distance.

[0031] Step 1312: Obtain the first intermediate billet rolling scheme based on the minimum roller table distance.

[0032] Specifically, in the first intermediate billet rolling scheme, the minimum roller table distance is used as the designed roller table length. At the same time, an intermediate billet L1 is placed at a distance a1 from the roughing mill's steel discarding distance a1, and a plate L2 is placed at a safety distance S between the intermediate billets. The distance between the plate L2 and the finishing mill is a2. a1 can be equal to a2.

[0033] Step 1321: If the intermediate billet cooling time is greater than or equal to the intermediate billet processing time, then compare the current roller table distance with the sum of the minimum roller table distance and the intermediate billet length to obtain a comparison result.

[0034] Specifically, in combination Figure 2 As shown, the current roller table distance between the roughing mill and the finishing mill is L. Compare the current roller table distance L between the roughing mill and the finishing mill with the minimum roller table distance Lmin between the roughing mill and the finishing mill + the length of the intermediate billet in the last pass of the roughing mill (i.e., the intermediate billet oscillating on the roller table between the roughing mill and the finishing mill) L1.

[0035] Step 1322: Based on the comparison results, the intermediate billet cooling time, the intermediate billet transport time, the intermediate billet rolling time, the current roller table distance, the minimum roller table distance, the intermediate billet length, and the intermediate billet safety distance, a second intermediate billet rolling scheme and a third intermediate billet rolling scheme are obtained.

[0036] In this embodiment, time information and rolling information are comprehensively considered. Time information includes the intermediate billet cooling time, intermediate billet transport time, and intermediate billet rolling time. Rolling information includes the intermediate billet length, plate length, roughing mill throwing distance, finishing mill throwing distance, and intermediate billet safety distance, laying the foundation for subsequent scheme design. The sum of the intermediate billet transport time and the intermediate billet rolling time is taken as the intermediate billet processing time. By calculating and comparing the intermediate billet cooling time and the intermediate billet processing time, it is determined whether each intermediate billet needs to be oscillated on the roller table to maintain its temperature, avoiding high-temperature billets entering the finishing mill due to insufficient cooling, and ensuring that the intermediate billet temperature at the finishing mill inlet is within the optimal range. If the intermediate billet cooling time is less than the intermediate billet processing time, the minimum roller table distance is calculated. The first intermediate billet rolling scheme is obtained through the minimum roller table distance, ensuring that all intermediate billets can pass smoothly without steel blockage, avoiding unnecessary downtime. If the intermediate billet cooling time is greater than or equal to the intermediate billet processing time, the sum of the current roller table distance and the minimum roller table distance with the intermediate billet length is further compared, and a second and third intermediate billet rolling scheme are formulated according to the specific situation. This enables the production line to adapt to changing working conditions and improves the utilization rate of the rolling mill while ensuring timely cooling of the intermediate billet.

[0037] Optionally, obtaining the second and third intermediate billet rolling schemes based on the comparison results, the intermediate billet cooling time, the intermediate billet transport time, the intermediate billet rolling time, the current roller table distance, the minimum roller table distance, the intermediate billet length, and the intermediate billet safety distance includes: The quantity of the first intermediate billet is obtained based on the intermediate billet cooling time, the intermediate billet transport time, and the intermediate billet rolling time; When the current roller table distance is less than the sum of the minimum roller table distance and the length of the intermediate billet, the second intermediate billet rolling scheme is obtained based on the number of the first intermediate billets; When the current roller table distance is greater than or equal to the sum of the minimum roller table distance and the intermediate billet length, the number of second intermediate billets is obtained based on the current roller table distance, the minimum roller table distance, the intermediate billet length, and the intermediate billet safety distance. The rolling scheme for the third intermediate billet is obtained based on the number of the first intermediate billet and the number of the second intermediate billet.

[0038] Optionally, obtaining the number of first intermediate billets based on the intermediate billet cooling time, the intermediate billet transport time, and the intermediate billet rolling time includes: The quantity of the first intermediate billet is obtained based on the intermediate billet cooling time, the intermediate billet transport time, and the intermediate billet rolling time. The quantity of the first intermediate billet includes: N1=INT((Δts-Δtt) / Δtf), Where N1 is the number of the first intermediate billets, INT() is the integer sign, Δts is the cooling time of the intermediate billets, Δtt is the transport time of the intermediate billets, and Δtf is the rolling time of the intermediate billets.

[0039] Optionally, obtaining the number of second intermediate billets based on the current roller table distance, the minimum roller table distance, the intermediate billet length, and the intermediate billet safety distance includes: The quantity of the second intermediate billet is obtained based on the current roller table distance, the minimum roller table distance, the intermediate billet length, and the intermediate billet safety distance; The quantity of the second intermediate billet includes: N2=INT((L-Lmin) / (L1+S)), Where N2 is the number of the second intermediate billets, INT() is the integer sign, L is the current roller table distance, Lmin is the minimum roller table distance, L1 is the length of the intermediate billet, and S is the safety distance of the intermediate billet.

[0040] In some more specific embodiments, multiple intermediate billets of length L1 are provided, and a plate of length L2 is obtained from the penultimate pass. When the number of intermediate billets is determined, it refers to rolling of the same specification, meaning each billet from the heating furnace has the same specification, the same number of passes in the roughing mill, and the same number of passes in the finishing mill. Both the roughing and finishing mills are reversible. The intermediate billet of length L1 obtained after roughing represents the maximum length during the roughing stage. During finishing mill rolling, the plate of length L2 obtained from the penultimate pass represents the maximum length within the space between the roughing and finishing mills. After the final pass of the finishing mill, the plate length is greater than L2, but during the final pass, the plate reaches the right side of the finishing mill in the illustrated direction. After the roughing mill rolling, intermediate billets are obtained, each with a length of L1. The plate of length L2 from the penultimate pass of the finishing mill then enters the finishing mill for the final pass. When there are multiple intermediate billets waiting to be heated within a distance of length L between the roughing mill and the finishing mill, multiple intermediate billets of length L1 are allowed to be placed in this space of length L, along with a plate of length L2 that is currently being processed in the penultimate pass of the finishing mill.

[0041] Optionally, obtaining the rolling scheme for the third intermediate billet based on the quantity of the first intermediate billet and the quantity of the second intermediate billet includes: The target number of intermediate billets is obtained based on the number of the first intermediate billets and the number of the second intermediate billets. The number of target intermediate blanks includes: N = MIN(N1, N2), Where N is the target number of intermediate billets, MIN() is the sign of the smaller value between N1 and N2, where N1 is the number of the first intermediate billets and N2 is the number of the second intermediate billets; The rolling scheme for the third intermediate billet is obtained based on the target number of intermediate billets.

[0042] Optionally, the step of using the sum of the intermediate billet length, the plate length, the roughing mill throwing distance, the finishing mill throwing distance, and the intermediate billet safety distance as the minimum roller table distance includes: The minimum roller table distance is the sum of the intermediate billet length, the plate length, the roughing mill throwing distance, the finishing mill throwing distance, and the intermediate billet safety distance. The minimum roller conveyor distance includes: Lmin = L1 + L2 + S + a1 + a2, Wherein, Lmin is the minimum roller table distance, L1 is the length of the intermediate billet, L2 is the length of the plate, S is the safety distance of the intermediate billet, a1 is the steel throwing distance of the roughing mill, and a2 is the steel throwing distance of the finishing mill.

[0043] Specifically, L1 is the length of the intermediate billet, the length of the intermediate billet in the last pass of roughing rolling (i.e., the intermediate billet oscillating on the roller table between the roughing mill and the finishing mill). L2 is the length of the plate, the length of the plate in the penultimate pass of finishing rolling. S is the safety distance of the intermediate billet, the safety distance of the intermediate billet oscillating on the roller table; if multiple intermediate billets oscillate on the roller table, the safety distance between them. a1 is the roughing mill throwing distance, and a2 is the finishing mill throwing distance, referring to the distance the billet must leave the rolling mill after each pass of rolling. For both roughing and finishing mills, the maximum rolling speed is similar, a1=a2, therefore, the distance the billet leaves the rolling mill after the last pass of rolling is fixed.

[0044] In this optional embodiment, during the hot continuous rolling production of thick plates, if the roller table length is insufficient to accommodate the intermediate billet flow under the current rolling rhythm, it is highly likely that the subsequent intermediate billet will catch up with the previous one, causing equipment alarms or shutdowns. By calculating the minimum roller table distance and generating a first intermediate billet rolling scheme accordingly, the continuous and efficient operation of the production line can be ensured.

[0045] Optionally, obtaining the time information includes: Obtain the cooling mode, wherein the cooling mode includes air cooling mode and water cooling mode; The cooling time of the intermediate billet is obtained through the cooling mode.

[0046] Specifically, the intermediate billet between the roughing mill and the finishing mill uses an air-cooling mode, and the cooling time is calculated based on an air-cooling model. If a water-cooling mode is used, the cooling time can be significantly reduced.

[0047] In some more specific embodiments, both the roughing mill and the finishing mill are four-high reversible horizontal mills. The specific structural configurations differ; the finishing mill's upper and lower work rolls have work roll lateral movement and work roll bending functions. These functions aim to improve product quality and do not affect the length of the plate, therefore they do not affect the number of intermediate billets awaiting warm-up. The speed at which the intermediate billets are transported to the finishing mill after roughing is selected as 3.5 m / s. The equipment distance between the roughing and finishing mills is 108 m, considering that during transportation, the speed needs to be accelerated to 3.5 m / s first, and then decelerated to the appropriate speed for the finishing mill to bite in. The equipment distance between the roughing and finishing mills described in the example is a fixed value for a completed thick plate production line where both machines are already installed and the equipment distance is fixed. When determining the number of intermediate billets to be heated, the specifications of the billets before and after are the same, that is, the thickness, width, length and heating temperature of the billets before and after in the heating furnace are the same; the temperature after descaling by the high-pressure water descaling machine is the same; the number of passes rolled by the roughing mill is the same, and the dimensions, temperature and total time of each pass are the same, and the number of passes rolled by the finishing mill is the same, and the dimensions, temperature and total time of each pass are the same. The length of the intermediate billet in the last pass of roughing rolling is L1=10.5m, and the length of the plate in the penultimate pass of finishing rolling is L2=32.8m. The distances between roughing and finishing rolling are a1 and a2=5m. The safe distance between the intermediate billets on the roller table is S=4m. The time required for the intermediate billet exit temperature RDT of the last pass of roughing rolling to reach the starting temperature FET of finishing rolling through air cooling is Δts=618s. The time required for the intermediate billet to be transported from the roughing mill to the finishing mill via the roller table is Δtt=55s. The total time required for the intermediate billet to complete rolling on the finishing mill is Δtf=124s. This is an example of the time required to roll 9 passes on the finishing mill.

[0048] Considering the time factor, the number of steel blocks that can be warm-balanced between the roughing mill and the finishing mill is N1 = INT((Δts-Δtt) / Δtf) = 4 blocks; Considering the distance factor, the number of steel blocks that can be warm-balanced between the roughing mill and the finishing mill is N2 = INT((L - Lmin) / (L1 + S)) = 3 blocks; Taking into account the total number of steel blocks that can be warm-pressed between the roughing mill and the finishing mill, N = MIN(N1, N2) = 3 blocks.

[0049] Rolling of slabs of different specifications: Rolling of slabs of different specifications refers to adjacent slabs having different materials or rolling procedures. In actual production, if the lengths of the intermediate slabs in the last pass of roughing rolling (i.e., the intermediate slabs oscillating on the roller table between the roughing and finishing mills) of adjacent slabs are different, the lengths of the plates in the penultimate pass of finishing rolling are different (as shown in the figure below), the time required for the intermediate slab exit temperature RDT of the last pass of roughing rolling to reach the entry temperature FET of finishing rolling through air cooling is different (Δts), the total time required for the intermediate slabs to complete rolling on the finishing mill is different (Δtf), and the time required for the intermediate slabs to be transported from the roughing mill to the finishing mill via the roller table is different (Δtt). The steel throwing distance 'a' in roughing and finishing rolling is the same, and the safety distance S of the intermediate slabs oscillating on the roller table is the same. Or, the materials or rolling procedures of several adjacent slabs are all different. The number of steel blocks that can be heated between the roughing mill and the finishing mill is greatly affected by the disordered changes between the above-mentioned variables. It is recommended that the billet with the smaller Δts value be used as the first billet for rolling, which is the billet 1 with the smaller Δts value, as the billet from the outlet temperature RDT of the last pass of the roughing mill to the inlet temperature FET of the finishing mill.

[0050] like Figure 3 As shown in the figure, an embodiment of the present invention provides a design device for intermediate billet rolling scheme of a wide and thick plate production line, comprising: The information acquisition module 310 is used to acquire time information and rolling information. The time information includes intermediate billet cooling time, intermediate billet transport time and intermediate billet rolling time. The rolling information includes intermediate billet length, plate length, roughing mill throwing distance, finishing mill throwing distance and intermediate billet safety distance. The intermediate billet processing time acquisition module 320 is used to take the sum of the intermediate billet transport time and the intermediate billet rolling time as the intermediate billet processing time; The minimum roller table distance acquisition module 330 is used to take the sum of the intermediate billet length, the plate length, the roughing mill throwing distance, the finishing mill throwing distance, and the intermediate billet safety distance as the minimum roller table distance if the intermediate billet cooling time is less than the intermediate billet processing time. The first rolling scheme acquisition module 340 is used to obtain the first intermediate billet rolling scheme based on the minimum roller table distance. The comparison module 350 is used to compare the current roller table distance with the sum of the minimum roller table distance and the length of the intermediate billet if the intermediate billet cooling time is greater than or equal to the intermediate billet processing time, and obtain a comparison result. The second rolling scheme acquisition module 360 ​​is used to obtain a second intermediate billet rolling scheme and a third intermediate billet rolling scheme based on the comparison results, the intermediate billet cooling time, the intermediate billet transport time, the intermediate billet rolling time, the current roller table distance, the minimum roller table distance, the intermediate billet length, and the intermediate billet safety distance.

[0051] The intermediate billet rolling scheme design device for the heavy plate production line in this embodiment is used to implement the intermediate billet rolling scheme design method for the heavy plate production line as described above. Its advantages over the prior art are the same as the advantages of the intermediate billet rolling scheme design method for the heavy plate production line compared with the prior art, and will not be repeated here.

[0052] like Figure 4 As shown, an electronic device 400 provided in this embodiment of the invention includes a memory 410 and a processor 420; the memory 410 is used to store a computer program; the processor 420 is used to implement the intermediate billet rolling scheme design method of the wide and thick plate production line as described above when the computer program is executed.

[0053] Alternatively, an electronic device 400 includes a memory 410 and a processor 420 coupled to the memory 410; the memory 410 is configured to store a computer program; and the processor 420 is configured to perform the following operations when the computer program is executed: Acquire time information and rolling information, wherein the time information includes intermediate billet cooling time, intermediate billet transport time and intermediate billet rolling time, and the rolling information includes intermediate billet length, plate length, roughing mill throwing distance, finishing mill throwing distance and intermediate billet safety distance; The sum of the intermediate billet transport time and the intermediate billet rolling time is taken as the intermediate billet processing time; If the cooling time of the intermediate billet is less than the processing time of the intermediate billet, then the sum of the length of the intermediate billet, the length of the plate, the steel throwing distance of the roughing mill, the steel throwing distance of the finishing mill, and the safety distance of the intermediate billet shall be taken as the minimum roller table distance; The rolling scheme for the first intermediate billet is obtained based on the minimum roller table distance; If the intermediate billet cooling time is greater than or equal to the intermediate billet processing time, then the sum of the current roller table distance and the minimum roller table distance and the intermediate billet length is compared to obtain the comparison result; Based on the comparison results, the intermediate billet cooling time, the intermediate billet transport time, the intermediate billet rolling time, the current roller table distance, the minimum roller table distance, the intermediate billet length, and the intermediate billet safety distance, a second intermediate billet rolling scheme and a third intermediate billet rolling scheme are obtained.

[0054] This invention provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the intermediate billet rolling scheme design method for a wide and thick plate production line as described above.

[0055] Alternatively, a non-volatile computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to perform the following operations: Acquire time information and rolling information, wherein the time information includes intermediate billet cooling time, intermediate billet transport time and intermediate billet rolling time, and the rolling information includes intermediate billet length, plate length, roughing mill throwing distance, finishing mill throwing distance and intermediate billet safety distance; The sum of the intermediate billet transport time and the intermediate billet rolling time is taken as the intermediate billet processing time; If the cooling time of the intermediate billet is less than the processing time of the intermediate billet, then the sum of the length of the intermediate billet, the length of the plate, the steel throwing distance of the roughing mill, the steel throwing distance of the finishing mill, and the safety distance of the intermediate billet shall be taken as the minimum roller table distance; The rolling scheme for the first intermediate billet is obtained based on the minimum roller table distance; If the intermediate billet cooling time is greater than or equal to the intermediate billet processing time, then the sum of the current roller table distance and the minimum roller table distance and the intermediate billet length is compared to obtain the comparison result; Based on the comparison results, the intermediate billet cooling time, the intermediate billet transport time, the intermediate billet rolling time, the current roller table distance, the minimum roller table distance, the intermediate billet length, and the intermediate billet safety distance, a second intermediate billet rolling scheme and a third intermediate billet rolling scheme are obtained.

[0056] The present invention will now be described an electronic device 400 that can serve as a server or client of the present invention, which is an example of a hardware device that can be applied to various aspects of the present invention. Electronic device 400 is intended to represent various forms of digital electronic computer devices, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. Electronic device 400 can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0057] Electronic device 400 includes a computing unit that can perform various appropriate actions and processes based on a computer program stored in read-only memory (ROM) or a computer program loaded from a storage unit into random access memory (RAM). The RAM may also store various programs and data required for device operation. The computing unit, ROM, and RAM are interconnected via a bus. Input / output (I / O) interfaces are also connected to the bus.

[0058] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc. In this application, the units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiments of the present invention according to actual needs. Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units can be implemented in hardware or as software functional units.

[0059] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A method for designing an intermediate billet rolling scheme for a heavy plate production line, characterized in that, include: Acquire time information and rolling information, wherein the time information includes intermediate billet cooling time, intermediate billet transport time and intermediate billet rolling time, and the rolling information includes intermediate billet length, plate length, roughing mill throwing distance, finishing mill throwing distance and intermediate billet safety distance; The sum of the intermediate billet transport time and the intermediate billet rolling time is taken as the intermediate billet processing time; If the intermediate billet cooling time is less than the intermediate billet processing time, the sum of the intermediate billet length, the plate length, the roughing mill throwing distance, the finishing mill throwing distance, and the intermediate billet safety distance is taken as the minimum roller table distance. The minimum roller table distance is used to calculate the minimum required distance between the roughing mill and the finishing mill when there is no intermediate billet waiting to be heated on the rolling line. The rolling scheme for the first intermediate billet is obtained based on the minimum roller table distance; If the intermediate billet cooling time is greater than or equal to the intermediate billet processing time, then the current roller table distance and the sum of the minimum roller table distance and the intermediate billet length are compared to obtain the comparison result; Based on the comparison results, the intermediate billet cooling time, the intermediate billet transport time, the intermediate billet rolling time, the current roller table distance, the minimum roller table distance, the intermediate billet length, and the intermediate billet safety distance, a second intermediate billet rolling scheme and a third intermediate billet rolling scheme are obtained, including: The quantity of the first intermediate billet is obtained based on the intermediate billet cooling time, the intermediate billet transport time, and the intermediate billet rolling time; The quantity of the first intermediate billet includes: N1=INT((Δts-Δtt) / Δtf), Where N1 is the number of the first intermediate billets, INT() is the integer sign, Δts is the cooling time of the intermediate billets, Δtt is the transport time of the intermediate billets, and Δtf is the rolling time of the intermediate billets; When the current roller table distance is less than the sum of the minimum roller table distance and the length of the intermediate billet, the second intermediate billet rolling scheme is obtained based on the number of the first intermediate billets; When the current roller table distance is greater than or equal to the sum of the minimum roller table distance and the intermediate billet length, the number of second intermediate billets is obtained based on the current roller table distance, the minimum roller table distance, the intermediate billet length, and the intermediate billet safety distance. The quantity of the second intermediate billet includes: N2=INT((L-Lmin) / (L1+S)), Where N2 is the number of the second intermediate billets, INT() is the integer sign, L is the current roller table distance, Lmin is the minimum roller table distance, L1 is the length of the intermediate billet, and S is the safety distance of the intermediate billet; The rolling scheme for the third intermediate billet is obtained based on the number of the first intermediate billet and the number of the second intermediate billet.

2. The method for designing an intermediate billet rolling scheme for a heavy plate production line according to claim 1, characterized in that, The step of obtaining the rolling scheme for the third intermediate billet based on the quantity of the first intermediate billet and the quantity of the second intermediate billet includes: The target number of intermediate billets is obtained based on the number of the first intermediate billets and the number of the second intermediate billets. The number of target intermediate blanks includes: N = MIN(N1, N2), Where N is the target number of intermediate billets, MIN() is the sign of the smaller value between N1 and N2, where N1 is the number of the first intermediate billets and N2 is the number of the second intermediate billets; The rolling scheme for the third intermediate billet is obtained based on the target number of intermediate billets.

3. The method for designing an intermediate billet rolling scheme for a heavy plate production line according to claim 1, characterized in that, The acquisition of time information includes: Obtain the cooling mode, wherein the cooling mode includes air cooling mode and water cooling mode; The cooling time of the intermediate billet is obtained through the cooling mode.

4. A device for designing an intermediate billet rolling scheme for a wide and thick plate production line to implement the design method of claim 1, characterized in that, include: The information acquisition module is used to acquire time information and rolling information. The time information includes intermediate billet cooling time, intermediate billet transport time and intermediate billet rolling time. The rolling information includes intermediate billet length, plate length, roughing mill throwing distance, finishing mill throwing distance and intermediate billet safety distance. The intermediate billet processing time acquisition module is used to take the sum of the intermediate billet transport time and the intermediate billet rolling time as the intermediate billet processing time; The minimum roller table distance acquisition module is used to take the sum of the intermediate billet length, the plate length, the roughing mill throwing distance, the finishing mill throwing distance, and the intermediate billet safety distance as the minimum roller table distance if the intermediate billet cooling time is less than the intermediate billet processing time. The first rolling scheme acquisition module is used to obtain the first intermediate billet rolling scheme based on the minimum roller table distance; The comparison module is used to compare the current roller table distance with the sum of the minimum roller table distance and the length of the intermediate billet if the intermediate billet cooling time is greater than or equal to the intermediate billet processing time, and obtain a comparison result. The second rolling scheme acquisition module is used to obtain a second intermediate billet rolling scheme and a third intermediate billet rolling scheme based on the comparison results, the intermediate billet cooling time, the intermediate billet transport time, the intermediate billet rolling time, the current roller table distance, the minimum roller table distance, the intermediate billet length, and the intermediate billet safety distance.

5. An electronic device, characterized in that, Including memory and processor; The memory is used to store computer programs; The processor is configured to, when executing the computer program, implement the intermediate billet rolling scheme design method for a heavy plate production line as described in any one of claims 1 to 3.

6. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, which, when executed by a processor, implements the intermediate billet rolling scheme design method for a wide and thick plate production line as described in any one of claims 1 to 3.

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