Multi-thickness adaptive thin slab continuous casting system

Abstract

The invention relates to the technical field of metallurgical equipment, in particular to a multi-thickness adaptive thin slab continuous casting system which comprises a first fixing frame, a second fixing frame and a multi-thickness adapter, the second fixing frame is arranged at one end of the first fixing frame, a crystallizer vibration groove and the multi-thickness adapter are arranged on the second fixing frame, and the second fixing frame is used for continuously casting and guiding out a thin slab; the crystallizer vibration groove is arranged below the crystallizer vibration groove, the crystallizer vibration groove comprises a cooling guide groove, a connecting port, a flat cavity lining and a water cooling jacket, the cooling guide groove is connected with a discharging port of the crystallizer vibration groove through a feeding port in the upper portion, and the water cooling jacket is arranged on the lower portion of the cooling guide groove; the flat cavity lining at one end of the water cooling jacket is inserted into the cooling guide chute cavity; and the cooling guide chute is connected with the cooling circulation mechanism. On the premise that the crystallizer main body does not need to be disassembled and the stability of a cooling system and a vibration system is not affected, adaptive switching of slabs with different thicknesses can be rapidly achieved.

Description

Technical Field

[0001] This invention relates to the field of metallurgical equipment technology, and in particular to a multi-thickness adaptable thin slab continuous casting system. Background Technology

[0002] In existing thin slab continuous casting systems, the crystallizer is a key component for the solidification and forming of molten steel, and its internal cavity size directly determines the slab thickness. Currently, the industry mainly offers two types of adaptation solutions for slabs of different thicknesses: one type uses an integral crystallizer, which requires disassembling the entire crystallizer from the continuous casting machine body and replacing it with a brand new crystallizer with the corresponding internal cavity size when the slab thickness needs to be changed; the other type attempts to use an adjustable crystallizer, which uses a mechanical mechanism to drive the crystallizer wall to move up and down or left and right to change the internal cavity thickness.

[0003] However, the aforementioned existing technical solutions all have significant drawbacks and are difficult to meet the needs of efficient and stable multi-thickness adaptation production:

[0004] The replacement of integral crystallizers is cumbersome and time-consuming: Integral crystallizers are deeply coupled with the water cooling system, vibration system, and guiding system of the continuous casting machine. Replacement requires disassembling multiple components such as water cooling pipes, vibration mechanism connectors, and positioning components. After replacement, a series of procedures such as re-alignment calibration, sealing test, and cooling system debugging are required. A single replacement usually takes 4-6 hours, which seriously affects the operating efficiency of the production line and increases production and operating costs. At the same time, frequent overall disassembly will lead to a decrease in the connection accuracy between the crystallizer and various supporting systems. Long-term use is prone to problems such as sealing failure and poor vibration synchronization, which can lead to production accidents such as steel leakage and slab surface cracks.

[0005] Adjustable crystallizer solutions suffer from poor safety and unstable forming quality: Existing adjustable crystallizers change thickness by dynamically adjusting the position of the crystallizer wall, but their adjustment mechanisms must operate under high temperature and vibration conditions, and long-term use is prone to malfunctions such as mechanism jamming and positioning accuracy drift. Furthermore, during dynamic adjustment, a non-uniform gap distribution easily forms within the crystallizer cavity, resulting in uneven slab shell thickness during molten steel solidification. This not only affects the slab forming quality but also poses a risk of steel leakage due to insufficient shell strength. Based on this, a multi-thickness adaptable thin slab continuous casting mechanism was designed. This mechanism can work with continuous casting equipment to quickly switch between slabs of different thicknesses without disassembling the crystallizer body or affecting the stability of the cooling and vibration systems, while ensuring both molten steel solidification forming quality and production safety. Summary of the Invention

[0006] The purpose of this invention is to provide a multi-thickness adaptable thin slab continuous casting system that can quickly achieve the adaptation and switching of slabs of different thicknesses without disassembling the main body of the crystallizer or affecting the stability of the cooling system and vibration system, while ensuring the solidification and forming quality of molten steel and production safety.

[0007] The technical implementation scheme of the present invention is as follows:

[0008] A multi-thickness adaptable thin slab continuous casting system includes a first fixed frame, a second fixed frame, and a multi-thickness adapter. The second fixed frame is located at one end of the first fixed frame and is equipped with a crystallizer vibration groove and the multi-thickness adapter for thin slab continuous casting output. The crystallizer vibration groove is located below the crystallizer vibration groove and includes a cooling guide groove, a connecting port, a flat cavity liner, and a water-cooling jacket. The cooling guide groove is connected to the outlet of the crystallizer vibration groove through an upper feed port, and a water-cooling jacket is provided at the lower part of the cooling guide groove. The flat cavity liner at one end of the water-cooling jacket is inserted into the cavity of the cooling guide groove. The cooling guide groove is connected to a cooling circulation mechanism to achieve cooling, cooling down, solidification, and molding.

[0009] Optionally, the water-cooling jacket is a rectangular cavity structure with an opening in the middle, and the water-cooling jacket is connected to the connecting groove at the bottom of the cooling guide groove through an external connecting block; the connecting block is provided with a number of connecting ports, and the connecting ports are fixedly connected to the screw holes of the connecting groove by screws.

[0010] Optionally, the water-cooled jacket is provided with a second cooling chamber B, and the second water inlet of the second cooling chamber B is connected to the water tank through a third guide pipe; the second water outlet of the second cooling chamber B is connected to an external heat source recovery mechanism through a fourth guide pipe to realize heat exchange of cooling water.

[0011] Optionally, the cooling guide trough is provided with a first cooling chamber A, and the first cooling chamber A is formed with several vertical guide channels through the partition plate to facilitate the rapid flow of cooling water; the first water inlet on the first cooling chamber A is connected to the water tank through the first guide pipe for introducing cooling water; the first water outlet on the first cooling chamber A is connected to the guide pump through the second guide pipe to discharge cooling water and realize heat exchange operation; the guide pump is set on the support of the support bracket on one side of the first fixed frame.

[0012] Optionally, it also includes an adjustable heating mechanism, which includes a connecting support column, a lifting platform, screws, and a drive motor. The connecting support column is mounted on the upper part of the first fixed frame, and screws are symmetrically arranged in the inner cavity of the connecting support column. One end of the screw is provided with a first sprocket, and the first sprocket is connected to another screw through a chain to form a transmission structure. The screw holes and slide grooves at both ends of the lifting platform are respectively connected to the screws and slide bars in the connecting support column. Several heating components are provided inside the lifting platform. The connecting platforms at both ends of the lifting platform extend into the rectangular openings of the connecting support column and are connected to the screws.

[0013] Optionally, a protective cover is provided on the upper part of the connecting support column, and a drive motor is provided on the protective cover. The output shaft of the drive motor is connected to the screw through a coupling.

[0014] Optionally, the second fixing frame is provided with a solution receiving tank, and the guide pipe at the bottom of the solution receiving tank extends into the interior of the crystallizer vibration tank chamber.

[0015] Optionally, an arc-shaped guide bracket is provided inside the second fixed frame, and several first rollers are provided inside the arc-shaped guide bracket for guiding the billet discharge.

[0016] Optionally, the upper part of the first fixed frame is provided with a plurality of bearing seats, and the bearing seats are provided with second idlers.

[0017] The present invention has the following advantages:

[0018] 1. In this invention, the second fixing frame is equipped with a multi-thickness adaptation mechanism. This mechanism forms a linkage structure with the upper crystallizer vibration groove. It can not only receive the molten steel from the vibration groove and complete the precise flow, but also guide the molten steel smoothly into the cavity of the flat cavity liner. The molten steel is rapidly and uniformly cooled in the cavity through the synergistic effect of the two cooling structures, and then solidifies into a slab of a preset thickness, which is finally stably discharged from the lower end of the liner.

[0019] 2. In this invention, the water-cooling jacket and the upper flat cavity liner are designed to be detachable, allowing the flat cavity liner to be quickly removed from or installed on the water-cooling jacket. In actual production, for the continuous casting needs of slabs of different thicknesses, operators do not need to disassemble or replace the entire crystallizer equipment. They only need to replace the flat cavity liner of the corresponding thickness by disassembling the bottom assembly, which can complete the switching of production specifications and achieve stable forming and export of slabs of different thicknesses. This greatly simplifies the operation process and reduces the time and labor costs of equipment replacement.

[0020] 3. In this invention, the upper part of the first fixed frame is equipped with an adaptive heating mechanism. This mechanism forms a linkage control relationship with the multi-thickness flat cavity liner. When the liner of different thickness specifications is replaced to produce the corresponding slab, the heating mechanism can be adjusted synchronously according to the slab thickness parameters, flexibly changing the distance between the slab and the heat source, thereby achieving uniform and efficient heating of slabs of different thicknesses, providing qualified billets with the required temperature for subsequent steel rolling processes, and improving the adaptability and operating efficiency of the overall production line. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention.

[0022] Figure 2 This is the front view of the present invention.

[0023] Figure 3 This is a schematic diagram of the arc-shaped guide bracket part of the present invention.

[0024] Figure 4 This is a schematic diagram of the multi-thickness adaptation mechanism of the present invention.

[0025] Figure 5 This is a cross-sectional view of the multi-thickness adaptation mechanism of the present invention.

[0026] Figure 6 This is a schematic diagram of the structure of the crystallizer vibration groove of the present invention.

[0027] Figure 7 This is a schematic diagram of the heating adjustment mechanism of the present invention.

[0028] Figure 8 This is a schematic diagram of the flow guide groove of the present invention.

[0029] Figure 9 This is a schematic diagram of the water-cooled jacket portion of the present invention.

[0030] Meaning of reference numerals in the figure: 1-First fixed frame, 2-Second fixed frame, 4-Multi-thickness adapter, 401-Cooling guide trough, 402-Water cooling jacket, 403-Support bracket, 404-Support support, 405-Guide pump, 407-Second guide pipe, 408-First guide pipe, 409-Water tank, 410-Connection port, 412-Flat cavity liner, 413-External connecting block, 415-Second outlet, 416- Second water inlet, 417-feed inlet, 418-guide channel, 5-crystallizer vibration channel, 6-heating adjustment mechanism, 601-connecting support column, 602-slide bar, 603-rectangular opening, 604-lifting platform, 605-screw, 606-first sprocket, 607-chain, 608-protective cover, 609-drive motor, 7-solution receiving tank, 8-second idler roller, 9-arc guide bracket, 10-discharge port, 11-first idler roller. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. It is hereby declared that the directional terms such as up, down, left, right, front, back, inside, and outside used in this text are based solely on the accompanying drawings and are not intended to specifically limit the invention.

[0032] like Figures 1-6 As shown, a multi-thickness adaptable thin slab continuous casting system includes a first fixed frame 1, a second fixed frame 2, and a multi-thickness adaptable mechanism 4. The second fixed frame 2 is located at one end of the first fixed frame 1, and a crystallizer vibration groove 5 and a multi-thickness adaptable mechanism 4 are provided on the second fixed frame 2 for thin slab continuous casting output. The multi-thickness adaptable mechanism 4 is located below the crystallizer vibration groove 5. The multi-thickness adaptable mechanism 4 includes a cooling guide groove 401, a connecting port 410, a flat cavity liner 412, and a water-cooling jacket 402. The cooling guide groove 401 is connected to the outlet 10 of the crystallizer vibration groove 5 through the upper feed port 417. A water-cooling jacket 402 is provided at the lower part of the cooling guide groove 401. The flat cavity liner 412 at one end of the water-cooling jacket 402 is inserted into the cavity of the cooling guide groove 401. The cooling guide groove 401 is connected to a cooling circulation mechanism to achieve cooling, cooling down, solidification, and molding.

[0033] It should be noted that in the thin-slab continuous casting process, different thicknesses of thin slabs are often required to be produced due to market demand. In order to adapt to production, different models of crystallizers need to be changed. Traditional crystallizers are fixed and need to be completely disassembled when changing them, which is cumbersome. Moreover, after repeated disassembly, the gaps between parts will increase, causing molten iron to overflow from the gaps and damage the parts. Based on this, a continuous casting equipment for thin slabs with multiple thicknesses has been designed. The replacement and adjustment can be quickly completed by simply using the multi-thickness adapter 4 to adapt to the production needs of different thicknesses.

[0034] It should be further explained that the multi-thickness adaptation mechanism 4 is arranged directly below the crystallizer vibration trough 5. Its core function is to receive the molten steel from the crystallizer vibration trough 5 and complete the precise flow. Specifically, the inlet 417 of the cooling guide trough 401 and the outlet 10 of the crystallizer vibration trough 5 are sealed together to ensure that the molten steel can flow smoothly into the interior of the cooling guide trough 401. In the lower cavity of the cooling guide trough 401, a flat cavity liner 412 is installed. The flat cavity liner 412 and the water cooling jacket 402 are designed as an integrated structure and can be inserted into the cavity of the cooling guide trough 401 as a whole. It is firmly fixed to the bottom of the cooling guide trough 401 through the external connecting block 413.

[0035] This solution adopts an independent modular assembly design. When it is necessary to switch the thickness specifications of thin slabs, the operator does not need to disassemble the cooling guide trough 401 and other auxiliary components. He only needs to unscrew the screws on the external connecting block 413 to remove the integrated flat cavity liner 412 and water cooling jacket 402 as a whole. After replacing it with the liner assembly of the corresponding thickness specification, it can be fixed again, realizing rapid adaptation for the production of thin slabs of multiple thicknesses.

[0036] like Figures 1-9 As shown, the water-cooled jacket 402 is a rectangular cavity structure with an opening in the middle, and the water-cooled jacket 402 is connected to the connecting groove at the bottom of the cooling guide trough 401 through an external connecting block 413; the connecting block 413 is provided with several connecting ports, and the connecting ports are fixedly connected to the screw holes of the connecting groove by screws; the water-cooled jacket 402 is provided with a second cooling chamber B, and the second water inlet 416 of the second cooling chamber B is connected to the water tank 409 through a third guide pipe; the second water outlet 415 of the second cooling chamber B is connected to the external heat source recovery mechanism through a fourth guide pipe to realize the heat exchange of cooling water.

[0037] It should be noted that the water-cooled jacket 402 is internally configured with a second cooling chamber B structure for the introduction of cooling water. This allows for cooling at the discharge end when the thin sheet is exported, resulting in a more robust forming. The second water inlet 416 of the second cooling chamber B is connected to the water tank 409 via a third guide pipe. Water is introduced into the tank via a water pump. After heat exchange between the second cooling chamber B and the exported thin sheet, the cooling water generates heat, which can be used for domestic water use or to recover internal heat.

[0038] like Figures 1-8 As shown, the cooling guide trough 401 is provided with a first cooling chamber A, and the first cooling chamber A is formed by a partition plate to form several vertical guide channels 418 for the rapid flow of cooling water; the first water inlet on the first cooling chamber A is connected to the water tank 409 through the first guide pipe 408 for the introduction of cooling water; the first water outlet on the first cooling chamber A is connected to the guide pump 405 through the second guide pipe 407, and the guide pump 405 discharges the cooling water to achieve heat exchange operation; the guide pump 405 is set on the support (404) of the support bracket 403 on one side of the first fixed frame 1.

[0039] It should be noted that the cooling guide trough 401 adopts a hollow cavity structure design, and its internal cavity forms an independent first cooling chamber A. The cooling chamber A is closely fitted with the outer wall of the flat cavity liner 412, which can directly circulate and cool the flat cavity liner 412, ensuring that the molten steel can quickly and uniformly solidify and form after flowing into the liner cavity. The first water inlet of the first cooling chamber A is connected to the water tank 409 for water storage through the first guide pipe 408. The system is equipped with a cooling water pump as a power source. Driven by the cooling water pump, the cooling water in the water tank 409 is continuously transported to the interior of the first cooling chamber A through the first guide pipe 408. After flowing through the outer wall of the liner, heat exchange is completed, thereby achieving efficient cooling of the molten steel solidification process and ensuring the forming quality of the thin slab.

[0040] like Figures 1-7 As shown, it also includes an adjustable heating mechanism 6, which includes a connecting support 601, a lifting platform 604, a screw 605, and a drive motor 609. The connecting support 601 is mounted on the upper part of the first fixed frame 1, and screws 605 are symmetrically arranged in the inner cavity of the connecting support 601. A first sprocket 606 is provided at one end of the screw 605, and the first sprocket 606 is connected to another screw through a chain 607 to form a transmission structure. The screw holes and sliding grooves at both ends of the lifting platform 604 are respectively connected to the screw 605 and the sliding strip 602 in the connecting support 601. Several heating components are provided inside the lifting platform 604. The connecting platforms at both ends of the lifting platform 604 extend into the rectangular opening 603 of the connecting support 601 and are connected to the screw 605. A protective cover 608 is provided on the upper part of the connecting support 601, and a drive motor 609 is provided on the protective cover 608. The output shaft of the drive motor 609 is connected to the screw 605 through a coupling.

[0041] It should be noted that the core function of the heating mechanism 6 is to perform secondary heating treatment on the thin slab formed and discharged through the flat cavity liner 412, so that its temperature reaches the process requirements of subsequent rolling operations. The traditional thin slab heating channel adopts a fixed heat source arrangement. When the production line switches to produce thin slabs of different thicknesses, the change in slab thickness will directly cause the distance between the heat source and the slab surface to change, resulting in insufficient heating and poor temperature uniformity of the thin slab, which seriously affects the quality of subsequent processing. Although there are existing technologies that use power-driven methods to adjust the position of the heat source, such solutions have the disadvantages of high equipment energy consumption and high operating costs, making it difficult to achieve efficient industrial application. Based on this, this application specifically designs an adjustable heating mechanism 6 that matches the multi-thickness adaptation mechanism 4. This mechanism can synchronously adjust the distance between the heat source and the thin slab according to the liner specifications changed by the multi-thickness adaptation mechanism 4, ensuring that thin slabs of different thicknesses can obtain a stable and uniform heating effect, while also having the advantage of low energy consumption.

[0042] It should be further explained that the screw holes and slide grooves at both ends of the lifting platform 604 are connected to the screw rod 605 and slide bar 602 inside the connecting column 601, respectively. Under the rotation of the internal screw rod 605, the lifting platform 604 can be adjusted in height, thereby adjusting the distance between it and the thin plate and achieving synchronous adaptation.

[0043] It should be noted that the two screws use a sprocket and chain drive. To prevent loosening after long-term transmission, a tensioning wheel is installed on one side of the chain to pre-tighten the sprocket and chain.

[0044] like Figure 1 and Figure 8 As shown, the second fixed frame 2 is provided with an arc-shaped guide bracket 9, and the arc-shaped guide bracket 9 is provided with a number of first rollers 11 for guiding the billet discharge; the upper part of the first fixed frame 1 is provided with a number of bearing seats, and the bearing seats are provided with second rollers 8.

[0045] It should be noted that the arc-shaped guide bracket 9 is used to guide the sheet after it has been formed, feeding it into the second idler roller 8 to realize the transfer of the sheet and facilitate subsequent processing.

[0046] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A multi-thickness adaptable thin slab continuous casting system, comprising a first fixed frame (1), a second fixed frame (2), and a multi-thickness adaptable mechanism (4), characterized in that: The second fixing frame (2) is set at one end of the first fixing frame (1), and the second fixing frame (2) is provided with a crystallizer vibration groove (5) and a multi-thickness adaptation mechanism (4) for thin plate continuous casting output; The multi-thickness adaptation mechanism (4) is located below the crystallizer vibration groove (5). The multi-thickness adaptation mechanism (4) includes a cooling guide groove (401), a connection port (410), a flat cavity liner (412), and a water-cooling jacket (402). The cooling guide groove (401) is connected to the discharge port (10) of the crystallizer vibration groove (5) through the upper feed port (417). The lower part of the cooling guide groove (401) is provided with a water-cooling jacket (402). The flat cavity liner (412) at one end of the water-cooled jacket (402) is inserted into the cavity of the cooling guide groove (401); The cooling guide trough (401) is connected to the cooling circulation mechanism to achieve cooling, temperature reduction, condensation, and molding.

2. A multi-thickness adaptable thin slab continuous casting system according to claim 1, characterized in that, The water-cooling jacket (402) is a rectangular cavity structure with an opening in the middle, and the water-cooling jacket (402) is connected to the connecting groove at the bottom of the cooling guide groove (401) through an external connecting block (413); The connecting block (413) is provided with several connecting ports, which are fixedly connected to the connecting groove screw holes by screws.

3. A multi-thickness adaptable thin slab continuous casting system according to claim 2, characterized in that, The water-cooled jacket (402) is provided with a second cooling chamber (B), and the second water inlet (416) of the second cooling chamber (B) is connected to the water tank (409) through a third guide pipe; The second outlet (415) of the second cooling chamber (B) is connected to the external heat source recovery mechanism through the fourth guide pipe to realize the heat exchange of cooling water.

4. A multi-thickness adaptable thin slab continuous casting system according to claim 3, characterized in that, The cooling guide trough (401) is provided with a first cooling chamber (A), and the first cooling chamber (A) is formed with several vertical guide channels (418) through the partition plate to allow the cooling water to flow quickly. The first water inlet on the first cooling chamber (A) is connected to the water tank (409) through the first guide pipe (408) for introducing cooling water; The first outlet on the first cooling chamber (A) is connected to the guide pump (405) through the second guide pipe (407), and the guide pump (405) discharges the cooling water to achieve heat exchange operation. The flow pump (405) is mounted on the support (404) of the support bracket (403) on one side of the first fixed frame (1).

5. A multi-thickness adaptable thin slab continuous casting system according to claim 4, characterized in that, It also includes an adjustable heating mechanism (6), which includes a connecting support (601), a lifting platform (604), a screw (605) and a drive motor (609). The connecting support (601) is mounted on the upper part of the first fixed frame (1), and screws (605) are symmetrically arranged in the inner cavity of the connecting support (601). A first sprocket (606) is provided at one end of the screw (605), and the first sprocket (606) is connected to another screw through a chain (607) to form a transmission structure. The screw holes and slide grooves at both ends of the lifting platform (604) are connected to the screw rod (605) and slide bar (602) in the connecting support column (601) respectively. Several heating components are installed inside the lifting platform (604). The connecting platforms at both ends of the lifting platform (604) extend into the rectangular opening (603) of the connecting support column (601) and are connected to the screw (605).

6. A multi-thickness adaptable thin slab continuous casting system according to claim 5, characterized in that, The upper part of the connecting support (601) is provided with a protective cover (608), and a drive motor (609) is provided on the protective cover (608). The output shaft of the drive motor (609) is connected to the screw (605) through a coupling.

7. A multi-thickness adaptable thin slab continuous casting system according to claim 1, characterized in that, The second fixed frame (2) is provided with a solution receiving tank (7), and the material guide pipe at the bottom of the solution receiving tank (7) extends into the cavity of the crystallizer vibration tank (5).

8. A multi-thickness adaptable thin slab continuous casting system according to claim 7, characterized in that, The second fixed frame (2) is provided with an arc-shaped guide bracket (9), and the arc-shaped guide bracket (9) is provided with several first rollers (11) for guiding the billet discharge.

9. A multi-thickness adaptable thin slab continuous casting system according to claim 7, characterized in that, The upper part of the first fixed frame (1) is provided with several bearing seats, and the bearing seats are provided with second idler rollers (8).

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