A distributor moving mechanism for thin strip casting
By designing an independent distributor moving mechanism, adopting an upper and lower layer structure of large and small carriages, and combining the lifting of hydraulic cylinders and jacks, the complex equipment problem caused by the integration of the distributor with the tundish trolley was solved, realizing the rapid, reliable transportation and precise installation of the distributor, and improving the production efficiency of thin strip continuous casting.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANGHAI SANYI METALLURGICAL MATERIALS CO LTD
- Filing Date
- 2023-12-20
- Publication Date
- 2026-05-29
Smart Images
Figure CN117505793B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of thin strip continuous casting technology, and in particular relates to a distributor moving mechanism for thin strip continuous casting in the metallurgical field. It is a mechanism that can quickly and reliably transport the distributor from the baking position to the casting position. Background Technology
[0002] my country began experimental research on continuous steel casting in 1957, and in 1958, a vertical twin-strand continuous casting machine was built at Chongqing Iron and Steel Plant No. 3 to cast 175mm*200mm billets. It was the first to use a 500t flying shear to cut the billets. Around 2009, the emergence of thin slab continuous casting machines further simplified the process flow. Compared with the traditional continuous casting of slabs with a thickness of 150-300mm, the thickness of thin slabs is 40-70mm. Continuous casting eliminates the need for roughing mills, reducing plant area by 48%, continuous casting machine equipment weight by 50%, and hot rolling equipment by 30%. The production cycle from molten steel to thin plate is greatly shortened. Traditional slab continuous casting takes about 40 hours, while thin slab continuous casting only takes 1-2 hours. The practice of Nucor's compact strip steel production line has proven that the process of directly producing thin strip by continuous rolling of thin strip billets is as follows: thin slab 45mm (5m / min, 1100℃) → roughing 15mm (15m / min, 1120℃) → finishing 1.5mm (3.3mm / s, 880℃) → ferrite zone refining 0.7mm (7mm / s, 100℃).
[0003] Thin steel strip is widely used in machinery manufacturing, building structures, aerospace materials, electronic instruments, and especially automotive steel sheets and household appliances. Compared with the traditional slab continuous casting process, thin strip continuous casting has significant advantages in terms of plant area, equipment weight, production cycle, energy costs, production costs, and investment costs per ton of steel. In the thin strip continuous casting process, molten steel at around 1600℃ flows from the ladle through the tundish, distributor, flow distributor, roller crystallizer, and rolling mill to the coiler. The time it takes for the distributor to travel from the heating position to the casting position is a critical factor in the thin strip continuous casting production process. Whether the distributor reaches the casting position in a timely manner and whether it moves out of the casting position in a timely manner affects the production cycle.
[0004] Currently, the thin strip continuous casting production technology that has been successfully put into commercial production in China is the ultra-thin strip production line built and put into operation by Jiangsu Shagang Group Co., Ltd. in 2019, with an annual output of 500,000 tons and a minimum thickness of 0.75mm.
[0005] The distributor moving mechanism is integrated with the tundish trolley, and the distributor is loaded and unloaded from the casting position by the distributor moving mechanism on the tundish trolley. This results in a complex tundish trolley system, which is responsible for both loading and unloading distributors and transporting tundishes, making the tundish trolley's movements quite complex. The tundish trolley is also large in size and has low traveling accuracy, which affects the installation accuracy of the distributor. Therefore, designing a separate distributor moving mechanism has become a trend. Summary of the Invention
[0006] This invention provides a distributor moving mechanism for thin strip continuous casting, which solves the above problems.
[0007] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:
[0008] The present invention provides a distributor moving mechanism for thin strip continuous casting, comprising a main carriage that carries a trolley and moves between a main carriage working position and a baking position, a main carriage bracket that carries the trolley, and a trolley that moves between the main carriage working position and the trolley working position and carries the distributor; the distributor is heated to the required temperature by a distributor baking unit and then used in the thin strip continuous casting process; the trolley working position is the casting position;
[0009] The large and small vehicles are arranged in two layers, one above the other.
[0010] The trolley includes a trolley body, a trolley drive wheel, a trolley driven wheel, a trolley bracket, a hydraulic cylinder, a trolley guide wheel, and a trolley track;
[0011] The trolley includes a trolley body, a trolley drive wheel, a trolley driven wheel, a trolley bracket, a jack, and a trolley guide wheel.
[0012] Furthermore, the main drive wheel and the driven wheel of the trolley cooperate with the trolley guide rail at the bottom.
[0013] Furthermore, the trolley bracket is lifted by a hydraulic cylinder, and the trolley guide wheel on the trolley bracket cooperates with the guide groove on the trolley body.
[0014] Furthermore, the trolley's driving wheel and driven wheel cooperate with the trolley track on the main carriage.
[0015] Furthermore, the baking position includes a first baking position and a second baking position arranged on both sides.
[0016] Furthermore, when the trolley is correctly stopped at the trolley working position, the trolley bracket rises, the trolley track of the trolley bracket aligns with the trolley track of the casting position, and the trolley drive wheel and trolley driven wheel move along the trolley track to the casting position.
[0017] Furthermore, once the trolley is correctly moved to the casting position, the trolley stops, and the trolley bracket descends with the jack, with the trolley guide wheel on it engaging with the guide groove on the trolley body.
[0018] Furthermore, when the distributor is correctly placed on the casting position by the trolley bracket, the trolley bracket remains in a low position, and the trolley moves along the trolley track from the casting position to the large trolley, which remains in a high position; the large trolley bracket carrying the trolley descends to a low position, and the tundish descends until its drain outlet extends into the distributor, and the casting process begins; after the casting process is completed, the tundish rises until its drain outlet is pulled out of the distributor, and the trolley moves from the large trolley, which remains in a high position, to the casting position;
[0019] When the trolley is correctly moved to the casting position, the trolley bracket, which is kept in a low position, is lifted to a high position by the jack. The trolley bracket lifts the distributor, and the trolley moves from the casting position to the trolley, which is kept in a high position by the trolley bracket.
[0020] When the trolley is correctly stopped on the high-positioned carriage, the carriage is lowered from the high position to the low position, and the trolley moves from the working position to the baking position.
[0021] Once the truck is correctly positioned in the baking position, the used dispenser is replaced by the dried dispenser.
[0022] The trolley is supported by drive and driven wheels, with a geared motor driving the drive wheels to roll on guide rails. The trolley bracket is lifted and lowered by hydraulic cylinders, and the guide wheels on the trolley bracket cooperate with the guide grooves on the trolley body for guidance. The trolley is supported by drive and driven wheels, with a geared motor driving the drive wheels to roll on guide rails on the trolley bracket and the casting position. The trolley bracket is lifted and lowered by jacks, with a geared motor driving the jacks to lift and lower simultaneously via a steering gear. The guide rails on the trolley bracket cooperate with the guide grooves on the trolley body for guidance. The positioning holes on the distributor cooperate with the positioning pins on the trolley bracket, ensuring the distributor sits precisely on the trolley bracket; the positioning pins on the casting position also cooperate with the positioning holes on the distributor.
[0023] The process flow of the distributor moving mechanism is as follows:
[0024] (1) The distributor is first transported by the large vehicle carrying the trolley to the baking position, namely the first baking position arranged on both sides, for the drying distributor to be baked and heated.
[0025] (2) When the distributor is heated to the required temperature, the trolley carrying the trolley will transport the distributor from the baking position to the trolley working position, and the trolley will stop in the correct position so that the trolley track on the trolley bracket can be correctly connected with the trolley track on the casting position.
[0026] (3) The trolley bracket carries the trolley up until the trolley track on the trolley bracket is level with the working surface (i.e. the upper surface) of the trolley track on the casting position. The trolley carrying the distributor moves from the stopped trolley to the casting position, i.e. the trolley working position.
[0027] (4) When the trolley reaches the correct casting position, the trolley stops; the trolley bracket descends, and at the same time the distributor also correctly descends to the casting position;
[0028] (5) The unloaded trolley, with the trolley bracket in the lowered position, is moved back onto the main trolley to wait for the steel casting process to end.
[0029] (6) The rotary table moves the ladle (also called the tundish) full of molten steel to the casting position and installs the stopper on the ladle; the ladle descends until the stopper is correctly inserted into the tundish, and the tundish also descends so that the outlet of the tundish is correctly inserted into the distributor.
[0030] (7) At this time, molten steel is injected from the ladle into the tundish along the stopper rod. The molten steel in the tundish is injected into the distributor along its lower outlet, and the molten steel in the distributor is injected into the roll gap of the roller crystallizer along its lower outlet.
[0031] (8) When the casting is finished, the trolley bracket, which is in a low position, is correctly moved from the main carriage to the casting position; the trolley bracket rises to lift the distributor, and the trolley moves back to the main carriage and stops.
[0032] (9) The large carriage is lowered, and the large carriage carrying the small carriage is moved to the baking position, i.e. the second baking position; the used distributor is waiting to be replaced.
[0033] This invention provides a highly reliable distributor moving mechanism that is independently operated, compact, precise in action, and capable of supporting distributors with larger volumes or weights, for use in the field of thin strip continuous casting.
[0034] The present invention has the following advantages over the prior art:
[0035] (1) This technical solution provides a distributor moving mechanism that is independently operated, compact in structure, precise in action, and capable of carrying larger distributors in the field of thin strip continuous casting, and has high reliability.
[0036] (2) Compared with the prior art, this technical solution is a set that is independent of the tundish trolley, and has a higher degree of process operability; the structure of the prior art limits the shape and weight of the distributor, which limits the iteration of the thin strip continuous casting process, while this solution has a larger load capacity and does not have such limitations; the speed of the prior art is affected by the tundish trolley, while this solution has a higher speed and a shorter replacement time.
[0037] (3) It shortens the replacement interval of the distributor; it can adapt to the ever-improving distributor structure; and it is convenient for different situations encountered in actual operation.
[0038] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description
[0039] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0040] Figure 1 This is a top view of the structure of a distributor moving mechanism for thin strip continuous casting according to the present invention;
[0041] Figure 2 for Figure 1 Sectional view of AA in the middle;
[0042] Figure 3 for Figure 1 Cross-sectional view of the middle section (BB);
[0043] Figure 4 for Figure 1 A three-dimensional schematic diagram of the double-layer structure of the medium and large vehicles and the small vehicles;
[0044] The attached diagram lists the components represented by each number as follows:
[0045] 1-Trolley track, 2-Carriage, 3-Trolley, 4-Distributor, 5-Intermediate ladle, 6-Trolley bracket, 7-Trolley guide wheel, 8-Jack, 9-Roller crystallizer, 10-Trolley driven wheel, 11-Trolley body, 12-Trolley drive wheel, 13-Carriage bracket, 14-Carriage bracket, 15-Carriage guide wheel, 16-Carriage body, 17-Carriage drive wheel, 18-Carriage driven wheel, 19-Carriage guide rail, 20-Ladle baking machine, C-Support, D-Trolley working position, E-Carriage working position, F-First baking position, G-Second baking position. Detailed Implementation
[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0047] In the description of this invention, it should be understood that the terms "upper and lower", "two layers", "bottom", "lower position", "middle", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.
[0048] Thin steel strip is widely used in machinery manufacturing, building structures, aerospace materials, electronic instruments, and especially automotive steel sheets and household appliances. Compared with the traditional slab continuous casting process, thin strip continuous casting has significant advantages in terms of plant area, equipment weight, production cycle, energy costs, production costs, and investment costs per ton of steel. In the thin strip continuous casting process, molten steel at around 1600℃ flows from the ladle through the tundish, distributor, flow distributor, roller crystallizer, and rolling mill to the coiler. The time it takes for the distributor to travel from the heating position to the casting position is a critical factor in the thin strip continuous casting production process. Whether the distributor reaches the casting position in a timely manner and whether it moves out of the casting position in a timely manner affects the production cycle.
[0049] The prior art, as mentioned in the background section, states that "its distributor moving mechanism is integrated with the tundish trolley, and the distributor is loaded and unloaded from the casting position by the distributor moving mechanism on the tundish trolley." For example, in the invention patent "Wear-resistant Side Baffle" (publication number CN 101454095 A), the specific implementation mentions that "molten metal flows out from the tundish 25, passes through the outlet 31, passes through the outlet nozzle 32, and reaches the movable tundish 26 (also called a distributor or transition piece)" and "when it is decided that the side baffle 35, core nozzle 27, or movable tundish 26 must be replaced due to wear or other reasons... but it is removed from the working position of the refractory components during casting." These paragraphs implicitly suggest that the tundish trolley has a system for clamping and placing the movable tundish.
[0050] To address existing shortcomings, this invention provides insights and directions for the research and development of the distributor's moving mechanism, including how to make the loading and unloading of the distributor quick and reliable, how to reliably load and unload different distributors adapted to different steel grades, how to maintain the compact and reasonable design of the distributor's moving mechanism, how to enable the distributor's moving mechanism to bear greater weight, and how to ensure the distributor can be precisely installed at the casting position. To solve the above technical problems, this invention adopts the following technical solution:
[0051] Please see Figure 1-4As shown, the present invention provides a distributor moving mechanism for thin strip continuous casting, which can transport the distributor 4 (also called a sorting bag or distributor) from the baking position to the trolley working position (also called the casting position). The distributor moving mechanism includes a main carriage 2 that carries the trolley 3 and moves between the main carriage working position E and the baking position, a main carriage bracket 13 that carries the trolley 3, and a trolley 3 that moves between the main carriage working position E and the trolley working position D and carries the distributor 4. The distributor 4 is heated to the required temperature by the distributor baking unit 20 and then used in the thin strip continuous casting process. The trolley working position D is the casting position.
[0052] Large vehicle 2 and small vehicle 3 are arranged in two layers, one above the other;
[0053] The large trolley 2 includes a large trolley body 16, a large trolley drive wheel 17, a large trolley driven wheel 18, a large trolley bracket 13, a hydraulic cylinder 14, a large trolley guide wheel 15, and a small trolley track 1;
[0054] The car 3 includes a car body 10, a car drive wheel 12, a car driven wheel 10, a car bracket 6, a jack 8, and a car guide wheel 7.
[0055] Among them, the main drive wheel 17 and the driven wheel 18 of the main car 2 cooperate with the main car guide rail 19 at the bottom; the main car bracket 13 is lifted by the oil cylinder 14, and the main car guide wheel 15 on the main car bracket 13 cooperates with the guide groove on the main car body 16.
[0056] Among them, the trolley drive wheel 12 and the trolley driven wheel 10 of the trolley 3 cooperate with the trolley track 1 on the trolley bracket 13.
[0057] The baking positions include a first baking position F and a second baking position G arranged on both sides.
[0058] When the trolley 2 is correctly stopped at the trolley working position E, the trolley bracket 13 rises, the trolley track 1 of the trolley bracket 13 is aligned with the trolley track 1 of the casting position, and the trolley drive wheel 12 and trolley driven wheel 10 of the trolley 3 move to the casting position along the trolley track 1.
[0059] When the trolley 3 is correctly moved to the casting position, the trolley 3 stops, and the trolley bracket 6 descends with the jack 8, and the trolley guide wheel 7 on it engages with the guide groove on the trolley body 11.
[0060] When the distributor 4 is correctly placed on the casting position by the trolley bracket 6, the trolley bracket 6 is kept in a low position, and the trolley 3 moves along the trolley track 1 from the casting position to the large trolley 2, which is kept in a high position by the large trolley bracket 13; the large trolley bracket 13, which carries the trolley 3, descends to a low position, and the intermediate ladle 5 descends until its drain outlet extends into the distributor 4, and the casting process begins; after the casting process is completed, the intermediate ladle 5 rises until its drain outlet is pulled out of the distributor 4, and the trolley 3 moves from the large trolley 2, which is kept in a high position by the large trolley bracket 13, to the casting position.
[0061] When the trolley 3 is correctly moved to the casting position, the trolley bracket 6, which is kept in a low position, is lifted to a high position by the jack 8. The trolley bracket 6 lifts the distributor 4, and the trolley 3 moves from the casting position to the trolley 2, which is kept in a high position by the trolley bracket 13.
[0062] When the trolley 3 is correctly stopped on the high-positioned carriage 13, the carriage 13 is lowered from the high position to the low position, and the trolley 2 moves from the trolley working position to the baking position.
[0063] When the large vehicle 3 is correctly parked in the baking position, the used distributor 4 is replaced by the dried distributor 4.
[0064] The process flow of the distributor moving mechanism is as follows:
[0065] (1) The distributor 4 is first transported by the large vehicle 2 carrying the trolley 3 to the baking position, namely the first baking position F arranged on both sides, so that the dried distributor 4 can be baked and heated.
[0066] (2) When the distributor 4 is heated to the required temperature, the trolley 2 carrying the trolley 3 transports the distributor 4 from the baking position to the trolley working position E, and the trolley 2 stops in the correct position so that the trolley track 1 on the trolley bracket 13 can be correctly connected with the trolley track 1 on the casting position.
[0067] (3) The trolley bracket 13 carries the trolley 3 upward until the trolley track 1 on the trolley bracket 13 is level with the working surface (i.e. the upper surface) of the trolley track 1 on the casting position. The trolley 3 carrying the distributor 4 moves from the stopped trolley 2 to the casting position, i.e. the trolley working position D.
[0068] (4) When the trolley 3 reaches the correct casting position, the trolley 3 stops; the trolley bracket 6 descends, and at the same time the distributor 4 also correctly descends to the casting position; the corresponding casting position is specifically along the thin strip continuous casting center line C;
[0069] (5) The unloaded trolley 3, with the trolley bracket 6 lowered to the low position, is moved back onto the main trolley 2 to wait for the steel casting process to end.
[0070] (6) The rotary table rotates the ladle (also called the ladle) full of molten steel to the casting position and installs the stopper rod on the ladle; the ladle descends until the stopper rod is correctly inserted into the tundish 5, and at the same time the tundish 5 also descends so that the drain outlet of the tundish 5 is correctly inserted into the distributor 4.
[0071] (7) At this time, molten steel is injected from the ladle into the tundish 5 along the stopper rod, and the molten steel in the tundish 5 is injected into the distributor 4 along its lower outlet, while the molten steel in the distributor 4 is injected into the roll gap of the roller crystallizer 9 along its lower outlet.
[0072] (8) When the casting is finished, the trolley bracket 6 keeps the trolley 3 in a low position and moves it correctly from the main carriage 2 to the casting position; the trolley bracket 6 rises to lift the distributor 4, and the trolley 3 moves back to the main carriage 2 and stops.
[0073] (9) The large carriage 14 descends, and the large carriage 2 carrying the small carriage 3 moves to the baking position, namely the second baking position G; the used distributor 4 is waiting to be replaced.
[0074] This invention provides a highly reliable distributor moving mechanism that is independently operated, compact, precise in action, and capable of supporting distributors with larger volumes or weights, for use in the field of thin strip continuous casting.
[0075] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims
1. A distributor moving mechanism for thin strip continuous casting, characterized in that, The system includes a main carriage (2) that carries the trolley (3) and moves between the main carriage working position (E) and the baking position; a main carriage bracket (13) that carries the trolley (3); and a trolley (3) that moves between the main carriage working position (E) and the trolley working position (D) and carries the distributor (4). The distributor (4) is heated to the required temperature by the distributor baking unit (20) and then used for the thin strip continuous casting process. The trolley working position (D) is the casting position. The large vehicle (2) and the small vehicle (3) are arranged in two layers, one above the other; The trolley (2) includes a trolley body (16), a trolley drive wheel (17), a trolley driven wheel (18), a trolley bracket (13), a hydraulic cylinder (14), a trolley guide wheel (15), and a trolley track (1); The trolley (3) includes a trolley body (11), a trolley drive wheel (12), a trolley driven wheel (10), a trolley bracket (6), a jack (8), and a trolley guide wheel (7); The process flow of the distributor moving mechanism includes the following steps: S1. The distributor (4) is first transported by the large vehicle (2) carrying the trolley (3) to the baking position, namely the first baking position (F) arranged on both sides, to bake and heat up the dried distributor (4). S2. When the distributor (4) is heated to the required temperature, the trolley (2) carrying the trolley (3) transports the distributor (4) from the baking position to the trolley working position (E), and the trolley (2) stops in the correct position so that the trolley track 1 on the trolley bracket (13) can be properly connected with the trolley track (1) on the casting position. S3, the trolley bracket (13) carries the trolley (3) up until the trolley track (1) on the trolley bracket (13) is level with the working surface of the trolley track (1) on the casting position, and the trolley (3) carrying the distributor (4) moves from the stopped trolley (2) to the casting position, i.e. the trolley working position (D). S4. When the trolley (3) reaches the correct casting position, the trolley (3) stops; the trolley bracket (6) descends, and at the same time the distributor (4) also correctly descends to the casting position; the corresponding casting position is specifically along the thin strip continuous casting center line (C); S5. The unloaded trolley (3) is kept in the lowered trolley bracket (6) and moved back to the main trolley (2) to wait for the steel casting process to end. S6. The rotary table rotates the ladle full of molten steel to the casting position and installs the stopper rod on the ladle. The ladle descends until the stopper rod is correctly inserted into the tundish (5), and at the same time the tundish (5) also descends, so that the drain outlet of the tundish (5) is correctly inserted into the distributor (4). S7. At this time, molten steel is injected from the ladle into the tundish (5) along the stopper rod. The molten steel in the tundish (5) is injected into the distributor (4) along its lower outlet, while the molten steel in the distributor (4) is injected into the roll gap of the roller crystallizer (9) along its lower outlet. S8. After the casting is completed, the trolley bracket (6) keeps the trolley (3) in a low position and moves it correctly from the trolley (2) to the casting position. The trolley bracket (6) rises to lift the distributor (4), and the trolley (3) moves back onto the main trolley (2) and stops; S9. The large carriage (13) descends, and the large carriage (2) carrying the small carriage (3) moves to the baking position, namely the second baking position (G), and waits for replacement via the dispenser (4).
2. The distributor moving mechanism for thin strip continuous casting according to claim 1, characterized in that, The main drive wheel (17) and driven wheel (18) of the main vehicle (2) are engaged with the main vehicle guide rail (19) at the bottom.
3. The distributor moving mechanism for thin strip continuous casting according to claim 1, characterized in that, The trolley bracket (13) is lifted by the oil cylinder (14), and the trolley guide wheel (15) on the trolley bracket (13) cooperates with the guide groove on the trolley body (16).
4. The distributor moving mechanism for thin strip continuous casting according to claim 1, characterized in that, The trolley (3)’s driving wheel (12) and driven wheel (10) are matched with the trolley track (1) on the trolley bracket (13).
5. The distributor moving mechanism for thin strip continuous casting according to claim 1, characterized in that, The baking positions include a first baking position (F) and a second baking position (G) arranged on both sides.