Special-shaped protective plate for continuous casting tundish

Abstract

The utility model relates to the technical field of tundish protection plate structures, and discloses a continuous casting tundish special-shaped protection plate which comprises a first protection plate, a second protection plate and a tundish, vertical plates are fixedly connected to the middle positions of the left end and the right end of the first protection plate, and a fixing shaft penetrates through the middle position, close to the upper side, between the vertical plates. A rotating cylinder is rotatably installed at the position, corresponding to the middle of the first protection plate, of the outer side of the fixing shaft, three sets of evenly-distributed buffer plates are fixedly connected to the rotating cylinder, two sets of second protection plates are symmetrically installed at the positions, close to the left side and the right side of the first protection plate, of the second protection plates, and sliding grooves are formed in the middle positions of the second protection plates; and the outer sides of the fixed shafts are fixedly sleeved with limiting pieces at the sliding grooves. According to the device, the impact effect of molten steel is converted into rotating power of the rotary drum through the rotary drum and the buffer plate, direct scouring erosion of the molten steel to a tundish permanent layer and the protective plates is greatly relieved, meanwhile, the first liftable protective plate always floats on the surface of the molten steel, and the liquid level of the molten steel is stabilized.

Description

Technical Field

[0001] This utility model relates to the technical field of tundish guard plate structure, and in particular to a special-shaped guard plate for continuous casting tundish. Background Technology

[0002] In continuous casting production, the tundish is a critical piece of equipment, and the performance of its internal liner plates directly affects the casting quality and equipment lifespan. Traditional tundish liners are mostly fixed. During molten steel injection, the molten steel directly impacts the tundish liner and liners from the ladle nozzle, causing severe erosion and corrosion. This results in short liner lifespan, frequent tundish maintenance, and reduced production efficiency. Furthermore, the violent impact of molten steel can easily cause fluctuations and splashing, hindering the removal of inclusions and making it difficult to maintain a stable molten steel level, thus affecting the quality of the continuously cast billet.

[0003] As the steel industry continues to demand higher production efficiency and billet quality in continuous casting, the drawbacks of traditional tundish liner plates are becoming increasingly apparent. Therefore, we propose a special-shaped tundish liner plate for continuous casting to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a special-shaped tundish guard plate for continuous casting, which has the advantages of effectively buffering the impact of molten steel, adapting to changes in molten steel level, and facilitating maintenance and replacement, thus solving some of the problems mentioned in the background technology.

[0005] This utility model provides the following technical solution: a special-shaped guard plate for continuous casting tundish, including guard plate one, guard plate two, and tundish. Guard plate one has vertical plates fixedly connected to the middle of both its left and right ends. A fixed shaft passes through the middle of the vertical plates near the upper side. A rotating cylinder is rotatably installed on the outer side of the fixed shaft at the middle of the corresponding guard plate one. Three sets of evenly distributed buffer plates are fixedly connected to the rotating cylinder. Guard plate two has two sets of buffer plates symmetrically installed on its left and right sides near guard plate one. There is a certain gap between the lower end of guard plate two and the inner bottom of the tundish. A sliding groove is provided in the middle of guard plate two. The fixed shaft passes through the interior of the sliding groove. A limiting member is fixedly sleeved on the outer side of the fixed shaft at the sliding groove. The limiting member passes through and is slidably connected inside the sliding groove.

[0006] Furthermore, L-shaped clips are fixedly installed at the upper ends of the front and rear ends of the intermediate package at two corresponding protective plates. Positioning plates are placed inside the L-shaped clips. The L-shaped clips and positioning plates can provide support and limit fixation for other structures, and at the same time facilitate the removal of the positioning plates from the L-shaped clips.

[0007] Furthermore, a slot is provided in the middle of the positioning plate, and the second guard plate passes through and is slidably connected inside the slot, so that the positioning plate provides support for the second guard plate.

[0008] Furthermore, both the front and rear ends of the second protective plate penetrate into the interior of the L-shaped clip and fit together, that is, the L-shaped clip is used to limit and fix the second protective plate in the vertical direction, which simplifies the structure, facilitates disassembly and assembly, and reduces costs.

[0009] Furthermore, a stop plate is slidably sleeved on the positioning plate near the front side, and a threaded rod is threaded through and connected to the middle of the front end of the positioning plate. The rear end of the threaded rod is rotatably connected to the stop plate, and a handwheel is fixedly installed at the front end of the threaded rod. That is, by rotating the handwheel, the threaded rod can drive the stop plate to press against the intermediate liner, thereby fixing the positioning plate and preventing it from sliding.

[0010] Furthermore, right-angle connecting plates are slidably sleeved at both ends of the fixed shaft. Electric push rods are fixedly installed at the lower end of the right-angle connecting plates away from the tundish, which are used to drive the lifting and lowering of the first protective plate and other structures. This can be used with a high-precision liquid level sensor, or matched according to the data during the experiment, so that the first protective plate is placed on the surface of the molten steel. It is worth mentioning that the stability of this structure is ensured by the sliding of the limiting component in the chute, and the first protective plate and other structures are prevented from swaying in the left and right directions.

[0011] The advantages of this utility model are as follows:

[0012] 1. Through the rotating design of the drum and buffer plate, the impact of molten steel is transformed into the rotational power of the drum, effectively dispersing the impact force of molten steel and greatly reducing the direct scouring and erosion of the permanent layer of the tundish and the liner plate itself by the molten steel. At the same time, the liftable liner plate always "floats" on the surface of the molten steel, allowing the molten steel to slowly flow in in a near-static manner, significantly reducing the fluctuation and splashing of the molten steel. This not only creates favorable conditions for inclusions to float to the surface, but also stabilizes the molten steel surface, ensuring the stability of the continuous casting process in all aspects and greatly improving the quality of the cast billet.

[0013] 2. This special-shaped guard plate adopts a split design. During disassembly and maintenance, it is only necessary to operate the right-angle connecting plate, handwheel, threaded rod and other parts to quickly disconnect the connection and limit between the parts, and remove the severely corroded guard plate and key parts such as the rotating drum from the tundish. The installation process is equally convenient, which effectively reduces the time and labor costs required for tundish maintenance, significantly improves equipment maintenance efficiency, and ensures the continuity of continuous casting production. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0016] Figure 3This is a partial structural schematic diagram of the present invention.

[0017] In the diagram: 1. Guard plate one; 2. Guard plate two; 3. Intermediate liner; 4. Vertical plate; 5. Fixed shaft; 6. Rotary drum; 7. Buffer plate; 8. Limiting component; 9. Slide groove; 10. L-shaped clamp; 11. Positioning plate; 12. Slot; 13. Support plate; 14. Threaded rod; 15. Handwheel; 16. Right-angle connecting plate; 17. Electric push rod. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-2A special-shaped tundish guard plate for continuous casting includes a first guard plate 1, a second guard plate 2, and a tundish 3. A vertical plate 4 is fixedly connected to the middle of both ends of the first guard plate 1. A fixed shaft 5 passes through the middle of the vertical plates 4 near the upper side. A rotating cylinder 6 is rotatably installed on the outer side of the fixed shaft 5 at the middle of the corresponding guard plate 1. Three sets of evenly distributed buffer plates 7 are fixedly connected to the rotating cylinder 6. Two sets of buffer plates 7 are symmetrically installed on the left and right sides of the second guard plate 2 near the first guard plate 1. There is a certain gap between the lower end of the second guard plate 2 and the inner bottom of the tundish 3. A sliding groove 9 is provided in the middle position of each second guard plate 2. The fixed shaft 5 passes through the interior of the sliding groove 9. Limiting components 8 are fixedly sleeved on the outer side of shaft 5 at the slide groove 9. The limiting components 8 pass through and slide inside the slide groove 9. Right-angle connecting plates 16 are slidably sleeved on both the left and right ends of the fixed shaft 5. Electric push rods 17 are fixedly installed on the lower end of the right-angle connecting plates 16 at a distance away from the tundish 3. When molten steel in the ladle is poured into the tundish 3, the ladle's nozzle is aligned with the buffer plate 7 on the rotating drum 6. When the molten steel flows down from the nozzle and falls on the buffer plate 7 and the rotating drum 6, the buffer plate 7 will rotate the rotating drum 6 due to the force caused by the molten steel. As the rotating drum 6 rotates, the buffer plate 7, which is directly washed by the molten steel, rotates to the lower side. Under the influence of gravity and the downward rotation of the buffer plate 7, the molten steel slowly flows to the top of the guard plate 1. This process is repeated until the molten steel on the guard plate 1 eventually flows into the bottom of the tundish 3. The rotating drum 6 and buffer plate 7 effectively mitigate the erosion caused by the molten steel, thus extending their service life. As the amount of molten steel in the tundish 3 increases, the electric push rod 17 is activated, causing the right-angle connecting plate 16 to rise. The rise of the right-angle connecting plate 16 then causes the guard plate 1 and the rotating drum 6 to rise synchronously, ensuring that the guard plate 1 always remains "floating" on the surface of the molten steel. This allows the molten steel on the first protective plate 1 to slowly flow into the molten steel in the tundish 3. This not only effectively reduces the direct scouring and erosion of the permanent layer inside the tundish 3 by the molten steel, extending the overall service life of the tundish 3, but also, the near-static state of the molten steel is conducive to the floating and removal of impurities, and avoids fluctuations and splashing of the molten steel in the tundish, making the molten steel surface more stable. This helps to improve the stability of the continuous casting process and the quality of the billet. The second protective plate 2 can further slow down the flow rate of the molten steel, reduce the scouring and erosion of the molten steel, and adjust the flow field distribution of the molten steel, making the molten steel flow more evenly and smoothly in the tundish 3.

[0020] Please see Figures 2-3At the upper ends of both the front and rear ends of the intermediate package 3, L-shaped clips 10 are fixedly installed at the corresponding guard plates 2. Positioning plates 11 are placed inside the L-shaped clips 10. A slot 12 is provided in the middle of the positioning plate 11. The guard plate 2 passes through and slides into the slot 12. Both the front and rear ends of the guard plate 2 pass through and fit into the L-shaped clips 10. A stop plate 13 is slidably sleeved on the positioning plate 11 near the front side. A threaded rod 14 passes through and is threadedly connected to the middle of the front end of the positioning plate 11. The rear end of the threaded rod 14 is rotatably connected to the stop plate 13. A handwheel 15 is fixedly installed at the front end of the threaded rod 14. This device can be disassembled for further processing. When performing replacement or maintenance, first move the right-angle connecting plate 16 to disengage it from the fixed shaft 5. Then, turn the handwheel 15 to rotate the threaded rod 14, releasing the clamping effect of the abutment plate 13 on the tundish 3. This allows the positioning plate 11 to move directly towards the opening of the L-shaped clamp 10, releasing the vertical limiting and fixing effect of the L-shaped clamp 10 on the second guard plate 2. Then, simply lift the positioning plate 11 to separate the second guard plate 2 from the fixed shaft 5. This allows the first guard plate 1 and the rotating drum 6, which are most severely corroded by molten steel, to be removed from the inside of the tundish 3, facilitating replacement or maintenance. The installation process is similar. The split-type structure design facilitates operation and improves disassembly and assembly efficiency.

[0021] Working Principle: When molten steel is poured from the ladle into the tundish 3, the ladle nozzle is aligned with the buffer plate 7 on the rotating drum 6. As the molten steel flows downwards from the nozzle onto the buffer plate 7 and the rotating drum 6, the buffer plate 7, driven by the molten steel, causes the rotating drum 6 to rotate. As the rotating drum 6 rotates, causing the buffer plate 7, which is directly impacted by the molten steel, to rotate downwards, the molten steel, under the influence of gravity and the downward flow of the buffer plate 7, slowly flows to the upper end of the guard plate 1. This process is repeated continuously, until the molten steel on the guard plate 1 eventually flows into the bottom of the tundish 3. As the amount of molten steel in the tundish 3 increases, the electric push rod 17 is activated, causing its output end to lift the right-angle connecting plate 16. The lifting of the right-angle connecting plate 16 causes the guard plate 1 and the rotating drum 6 to rise synchronously, thus keeping the guard plate 1 "floating" (the lower end of the guard plate 1 is in contact with the molten steel). The purpose of the contact between the liquid surfaces (similar to the state of a float on water) on the surface of the molten steel is to allow the molten steel on the first guard plate 1 to slowly flow into the molten steel in the tundish 3. The second guard plate 2 can further slow down the flow rate of the molten steel. Furthermore, when this device needs to be disassembled for replacement and maintenance, first move the right-angle connecting plate 16 to disengage it from the fixed shaft 5, turn the handwheel 15 to drive the threaded rod 14 to rotate, release the clamping action of the abutment plate 13 on the tundish 3, and then move the positioning plate 11 directly towards the opening direction of the L-shaped clamp 10, release the vertical limiting and fixing action of the L-shaped clamp 10 on the second guard plate 2, and then directly lift the positioning plate 11 to separate the second guard plate 2 from the fixed shaft 5, so that the most severely corroded structures such as the first guard plate 1 and the rotating drum 6 can be taken out from the inside of the tundish 3, thus facilitating replacement or maintenance. The installation is the same.

Claims

1. A continuous casting tundish profiled shield comprising a shield one (1), a shield two (2) and a tundish (3), characterized in that: The left and right ends of the first guard plate (1) are fixedly connected with vertical plates (4), the vertical plates (4) are penetrated by a fixed shaft (5) at the middle of the upper side, a rotating drum (6) is rotatably installed on the outer side of the fixed shaft (5) at the middle of the corresponding first guard plate (1), three groups of uniformly distributed buffer plates (7) are fixedly connected to the rotating drum (6), two groups of second guard plates (2) are symmetrically installed on the left and right sides of the first guard plate (1), there is a certain spacing between the lower end of the second guard plate (2) and the inner bottom of the tundish (3), a sliding groove (9) is arranged on the second guard plate (2) at the middle position, the fixed shaft (5) penetrates the inside of the sliding groove (9), a limiting piece (8) is fixedly sleeved on the outer side of the fixed shaft (5) at the sliding groove (9), and the limiting piece (8) penetrates and is slidably connected in the inside of the sliding groove (9).

2. A contoured shield for a continuous caster tundish according to claim 1, characterised in that: The upper ends of the front and rear ends of the tundish (3) are fixedly installed with L-shaped clamping pieces (10) at the corresponding second guard plates (2).

3. A contoured shield for a continuous caster tundish according to claim 2, characterised in that: The middle position of the positioning plate (11) is provided with a slot (12), and the second guard plate (2) penetrates and is slidably connected in the inside of the slot (12).

4. A contoured shield for a continuous caster tundish according to claim 1, characterised in that: The front and rear ends of the second guard plate (2) penetrate into the inside of the L-shaped clamping piece (10) and are attached.

5. A contoured shield for a continuous caster tundish according to claim 2, characterised in that: A resisting plate (13) is slidably sleeved on the positioning plate (11) near the front side, a threaded rod (14) is penetrated and threadedly connected at the middle of the front end of the positioning plate (11), the rear end of the threaded rod (14) is rotatably connected with the resisting plate (13), and a hand wheel (15) is fixedly installed on the front end of the threaded rod (14).

6. A contoured shield for a continuous caster tundish according to claim 1, characterised in that: The left and right ends of the fixed shaft (5) are slidably sleeved with right-angle connecting plates (16), and the lower ends of the right-angle connecting plates (16) are fixedly installed with electric push rods (17) away from the tundish (3).

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