Centering device for spraying pipe of continuous casting machine

Abstract

The invention relates to the technical field of continuous casting machines, in particular to a continuous casting machine spraying pipe centering device which comprises a continuous casting machine body, a positioning plate is installed on the side wall of the continuous casting machine body, a spraying vertical pipe is installed on the side wall of the positioning plate, and a plurality of L-shaped screws are fixedly installed on the outer surface of the spraying vertical pipe. The end, away from the spraying vertical pipe, of the L-shaped screw rod penetrates into the positioning plate, a threaded groove matched with the L-shaped screw rod is formed in the inner wall of the positioning plate, a fastening screw disc is rotationally arranged at the end of the L-shaped screw rod, and the fastening screw disc is used for being matched with the positioning plate to fix the L-shaped screw rod to the side wall of the positioning plate; the fastening screw disc is further matched with the positioning plate by rotating the fastening screw disc, so that the L-shaped screw rod is adjusted to be in a horizontal plane design, namely, each spraying pipe head can be centered, namely, the direction of the water outlet end of each spraying pipe head is perpendicular to the casting blank, and the situation that due to misalignment during spraying cooling, all parts of the blank are not uniform in the cooling process is avoided.

Description

Technical Field

[0001] This invention relates to the field of continuous casting machine technology, and in particular to a spray pipe centering device for a continuous casting machine. Background Technology

[0002] A continuous casting machine is a machine that directly pours molten steel into solid steel billets. The main equipment includes a ladle, ladle turntable, tundish, stopper rod mechanism, crystallizer, vibratory machine, secondary cooling equipment, straightening machine, dummy bar, cutting equipment, billet discharge device, and water-cooled drive rollers, etc.

[0003] Spray pipes are an important means of rapidly cooling billets in the secondary cooling zone, so their effectiveness plays a crucial role in the production efficiency and product quality of continuous casting machines. When the billet leaves the crystallizer, it only forms a thin shell and needs to be cooled quickly by spraying cooling medium through spray pipes to ensure complete solidification before entering the straightening machine, and to prevent bulging deformation or steel leakage caused by static pressure of molten steel.

[0004] Normally, the spray pipe is fixedly installed on the base by a bracket. However, prolonged exposure to high temperatures, vibrations, and corrosion from cooling water may cause the fixing rod to detach from the weld, resulting in a change in the position of the spray pipe. This means that the spray center and the surface of the billet will become misaligned or off-center. Under such conditions, spraying the billet will cause uneven cooling of the billet surface, which may lead to internal quality problems such as central cracks, carbon enrichment, and carbon segregation. In severe cases, external surface quality problems such as billet delamination and dents may occur.

[0005] Therefore, the present invention provides a spray pipe centering device for a continuous casting machine. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the spraying position between the spraying center and the surface of the billet will be skewed or misaligned in the prior art.

[0007] To solve the above-mentioned technical problems, the present invention provides a spray pipe alignment device for a continuous casting machine, including a continuous casting machine body. A positioning plate is installed on the side wall of the continuous casting machine body, and a spray vertical pipe is installed on the side wall of the positioning plate. Multiple L-shaped screws are fixedly installed on the outer surface of the spray vertical pipe. The ends of the L-shaped screws away from the spray vertical pipe penetrate into the interior of the positioning plate. The inner wall of the positioning plate is provided with threaded grooves adapted to the L-shaped screws. A fastening screw disc is rotatably provided at the end of the L-shaped screw, which cooperates with the positioning plate to fix the L-shaped screw to the side wall of the positioning plate. Multiple spray pipe heads are installed on the side wall of the spray vertical pipe, aligning the water outlet pipes of the spray pipe heads with the surface of the cast billet. The positioning plate and the entire spray vertical pipe are fixed to the side wall of the continuous casting machine body by the L-shaped screws, thus allowing alignment through the external... The cooling medium is introduced into the spray riser through the water inlet pipe, and then transferred to the spray head through the spray riser. The spray from the spray head rapidly cools the billet, ensuring complete solidification before entering the straightening machine. It should be noted that before each use, it is necessary to check whether the spray head is on a horizontal plane. If it is not on a horizontal plane, the fastening screw can be rotated to further engage with the positioning plate, adjusting the L-shaped screw to a horizontal design. This ensures that each spray head is aligned, and the water outlet of each spray head is perpendicular to the billet. This prevents misalignment during spray cooling, which can lead to uneven cooling of the billet, causing internal quality problems such as central cracks, carbon enrichment, and carbon segregation, as well as external surface quality problems such as billet delamination and dents.

[0008] In one embodiment of the present invention, a hydraulic cylinder is installed on the side wall of the continuous casting machine body, the telescopic end of the hydraulic cylinder is connected to the bottom wall of the positioning plate, and the positioning plate is slidably disposed on the side wall of the continuous casting machine body.

[0009] In one embodiment of the present invention, a water passage cavity is provided inside the spray pipe head, and a permeable plate is installed inside the spray pipe head and on the side near the water outlet. The surface of the permeable plate is provided with permeable grooves arranged in a circumferential array. A circular shaft is rotatably provided on the side wall of the permeable plate near the center. Multiple baffles are fixedly installed on the outer circumferential surface of the circular shaft. The baffles are used to block the permeable grooves. When the external cooling medium enters the spray vertical pipe through the water supply pipe and is sprayed onto the surface of the casting billet through the spray pipe head, the cooling medium will rapidly cool the casting billet. During the cooling process, the circular shaft can be controlled to rotate, so that the circular shaft drives the multiple baffles to rotate synchronously. The baffles will rotate towards the side closer to the permeable grooves, that is, the baffles can block more permeable grooves, which reduces the water output, that is, reduces the water output of the permeable grooves. That is, the water output stage of the spray pipe head is high flow rate first, followed by low flow rate.

[0010] In one embodiment of the present invention, a vent pipe is fixedly installed on the surface of each spray nozzle. The vent pipe is connected to an external air pump. During operation, when the spray nozzle sprays water through the water permeable trough, high-pressure gas can also be introduced into the vent pipe and the interior of the spray nozzle by the external air pump, so that the sprayed water is water mist, which can improve the cooling efficiency, make the droplets finer, and distribute them more evenly.

[0011] In one embodiment of the present invention, a support frame is installed at the end of the spray pipe head, and a reciprocating screw is rotatably provided on the surface of the support frame. The reciprocating screw is located at the center line of the spray pipe head, and a moving block is provided on the outer peripheral surface of the reciprocating screw. A cleaning unit is provided on the outer surface of the moving block, and the cleaning unit is used to clean the scale inside the spray pipe head.

[0012] In one embodiment of the present invention, the cleaning unit includes connecting rods fixedly installed on the outer surface of the movable block. Two connecting rods are provided and symmetrically designed relative to the movable block. A cleaning ring is installed at the end of the connecting rod away from the movable block. The outer surface of the cleaning ring contacts the inner wall of the spray pipe head. Two cleaning rings are provided and contact the entire spray pipe head. A recycling frame is provided inside the spray pipe head on the side away from the permeable plate. In the initial state, the cleaning ring is located on the side close to the permeable plate, and the cleaning part of the cleaning ring contacts the inner wall of the spray pipe head. When it is necessary to clean the water on the inner wall of the spray pipe head... During scale removal, the reciprocating screw is rotated, which drives the moving block with its outer thread design to move. The moving block drives the connecting rod and cleaning ring to move synchronously. The cleaning ring moves along the inner wall of the spray pipe head from one side of the permeable plate to the side closer to the recycling frame. The cleaning ring gradually cleans the scale on the inner wall of the spray pipe head. The cleaned scale falls along the annular surface of the inner wall of the spray pipe head to its bottom and is gradually pushed into the recycling frame by the cleaning ring. This achieves automatic self-cleaning of the scale on the inner wall of the spray pipe head, ensuring the uniformity of water output from the permeable tank and facilitating the cooling of the cast billet.

[0013] In one embodiment of the present invention, a crushing ring is rotatably disposed on the inner wall of the cleaning ring, and a crushing rod arranged in a circular array is fixedly installed on the outer circumferential surface of the crushing ring. The end of the crushing rod contacts the inner wall of the spray pipe head, and the crushing ring can rotate within the cleaning ring. During operation, as the cleaning ring moves along the inner wall of the spray pipe head, the crushing ring located on the inner wall of the cleaning ring rotates, and the crushing ring synchronously drives the crushing rod to rotate, so that the crushing rod can crush the hard scale in contact with it during the rotation, thereby improving the treatment effect of the scale. Moreover, with the subsequent movement of the cleaning ring, the crushed scale can be transported to the subsequent recycling box.

[0014] In one embodiment of the present invention, the outer wall of the cleaning ring is rotatably provided with a rotating gear via a bracket, and the inner wall of the crushing ring is equipped with a toothed ring, the toothed ring and the rotating gear being meshed together. During operation, when the cleaning ring moves along the inner wall of the spray pipe head, the rotating gear can be controlled to rotate, which will drive the toothed ring meshing with it to rotate. The toothed ring will drive the crushing ring and the crushing rod to rotate synchronously, and then the crushing rod will crush the scale as described above, thereby improving the treatment effect on the spray pipe head.

[0015] In one embodiment of the present invention, a limiting ring groove is formed inside the cleaning ring, and the crushing ring is rotatably designed inside the limiting ring groove by a limiting ring plate, the shape of the limiting ring plate being adapted to the shape of the limiting ring groove.

[0016] In one embodiment of the present invention, the recycling frame is snapped onto the bottom of the spray pipe head by a limiting clip, and a sealing strip is provided at the contact position between the recycling frame and the spray pipe head.

[0017] The technical solution of the present invention has the following advantages compared with the prior art: The spray pipe alignment device for a continuous casting machine described in this invention requires that the spray pipe head be observed to be on a horizontal plane before each use. If it is not on a horizontal plane, the fastening screw can be rotated to further engage with the positioning plate, thereby adjusting the L-shaped screw to a horizontal design. This ensures that each spray pipe head is aligned, with the water outlet of each spray pipe head oriented perpendicular to the billet. This prevents misalignment during spray cooling, which can lead to uneven cooling of the billet and cause internal quality problems such as central cracks, carbon enrichment, and carbon segregation, as well as external surface quality problems such as billet delamination and dents.

[0018] The continuous casting machine spray pipe centering device of this invention controls the rotation of a reciprocating screw, which drives a moving block with a threaded design on its outer surface to move. The moving block drives a connecting rod and a cleaning ring to move synchronously. The cleaning ring moves along the inner wall of the spray pipe head from one side of the permeable plate to the side closer to the recovery frame. The cleaning ring gradually cleans the scale on the inner wall of the spray pipe head. The cleaned scale falls along the annular surface of the inner wall of the spray pipe head to its bottom surface and is gradually pushed into the recovery frame by the cleaning ring. This realizes the automatic self-cleaning function of the scale on the inner wall of the spray pipe head, ensuring the uniformity of water output from the subsequent permeable trough and facilitating the cooling of the cast billet. Attached Figure Description

[0019] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the L-shaped screw structure of the present invention; Figure 3 This is a schematic diagram of the hydraulic cylinder structure of the present invention; Figure 4 This is a schematic diagram of the spray pipe head structure of the present invention; Figure 5 This is a schematic diagram of the permeable plate structure of the present invention; Figure 6 This is a schematic diagram of the connecting rod structure of the present invention; Figure 7 This is a schematic diagram of the permeable plate structure of the present invention; Figure 8 This is a schematic diagram of the shielding plate structure of the present invention; Figure 9 This is a schematic diagram of the crushing ring structure of the present invention; Figure 10 This is a schematic diagram of the reciprocating lead screw structure of the present invention; Figure 11 In this invention Figure 10 Enlarged view of the structure at point A.

[0021] Explanation of reference numerals in the accompanying drawings: 1. Continuous casting machine body; 2. Positioning plate; 3. Spray vertical pipe; 301. Spray pipe head; 4. L-shaped screw; 401. Fastening screw disc; 5. Hydraulic cylinder; 6. Water permeable plate; 601. Water permeable trough; 7. Round shaft; 8. Baffle plate; 9. Ventilation pipe; 10. Support frame; 11. Reciprocating screw; 12. Moving block; 13. Connecting rod; 14. Cleaning ring; 15. Recovery frame; 16. Crushing ring; 161. Gear ring; 17. Crushing rod; 18. Rotating gear; 19. Limiting ring groove; 20. Limiting ring plate. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0023] Reference Figures 1 to 11As shown in the embodiment of the present invention, a spray pipe centering device for a continuous casting machine includes a continuous casting machine body 1. A positioning plate 2 is installed on the side wall of the continuous casting machine body 1. A spray vertical pipe 3 is installed on the side wall of the positioning plate 2. A plurality of L-shaped screws 4 are fixedly installed on the outer surface of the spray vertical pipe 3. The ends of the L-shaped screws 4 away from the spray vertical pipe 3 penetrate into the interior of the positioning plate 2. The inner wall of the positioning plate 2 is provided with threaded grooves adapted to the L-shaped screws 4. A fastening screw disc 401 is rotatably provided at the end of the L-shaped screws 4. The fastening screw disc 401 is used to cooperate with the positioning plate 2 to fix the L-shaped screws 4 to the side wall of the positioning plate 2. A plurality of spray pipe heads 301 are installed on the side wall of the spray vertical pipe 3. The spray pipe heads 301 can adaptively change the water output. During operation, the billet leaves the crystallizer with only a thin shell, requiring rapid cooling by spraying cooling medium through the spray pipe to ensure complete solidification before entering the straightening machine. Specifically, when cooling the billet, the water outlet of the spray pipe head 301 is aligned with the billet surface, and the positioning plate 2 and the entire spray vertical pipe 3 are fixed to the side wall of the continuous casting machine body 1 by L-shaped screws 4. Therefore, the cooling medium can be introduced into the spray vertical pipe 3 through an external water inlet pipe, and then the cooling medium is transferred to the inside of the spray pipe head 301 through the spray vertical pipe 3. The spray from the spray pipe head 301 can rapidly cool the billet, ensuring complete solidification before entering the straightening machine. Moreover, the spray pipe head 301 can adaptively change the water output, allowing the billet to be cooled with a large flow rate first, followed by a slow cooling with a small flow rate. The initial large flow rate spray provides high-intensity cooling, accelerates the thickening of the billet shell, and suppresses the risk of deformation. As the billet shell thickens, it is necessary to avoid rapid cooling that could cause surface cracks, i.e., a small flow rate of water is used to achieve slow cooling. It should be noted that, in the embodiments of the present invention, "alignment" means that the angle between the water outlet end of the spray nozzle 301 and the surface of the billet is 90 degrees. Before each use, it is necessary to observe whether the spray nozzle 301 is on a horizontal plane. If it is not on a horizontal plane, the fastening screw 401 can be rotated to make the fastening screw 401 further cooperate with the positioning plate 2, so that the L-shaped screw 4 is adjusted to a horizontal plane design, that is, each spray nozzle 301 can be aligned, that is, the water outlet end of each spray nozzle 301 is perpendicular to the surface of the billet. This avoids misalignment during spray cooling, which would lead to uneven cooling of various parts of the billet, causing internal quality problems such as central cracks, carbon enrichment, and carbon segregation in the product, as well as external surface quality problems such as billet delamination and dents.

[0024] A hydraulic cylinder 5 is installed on the side wall of the continuous casting machine body 1. The telescopic end of the hydraulic cylinder 5 is connected to the bottom wall of the positioning plate 2. The positioning plate 2 is slidably disposed on the side wall of the continuous casting machine body 1. During operation, the telescopic end of the hydraulic cylinder 5 drives the positioning plate 2 to move up and down, thereby causing the positioning plate 2 to drive the spray vertical pipe 3 and the spray pipe head 301 to move up and down, thereby increasing the cooling area of ​​the billet surface.

[0025] The spray pipe head 301 has a water passage cavity inside. A permeable plate 6 is installed inside the spray pipe head 301 and on the side near the water outlet. The surface of the permeable plate 6 has permeable grooves 601 arranged in a circular array. A circular shaft 7 is rotatably arranged on the side wall of the permeable plate 6 near the center. Multiple baffle plates 8 are fixedly installed on the outer circumferential surface of the circular shaft 7. The baffle plates 8 are used to block the permeable grooves 601. It should be noted that, referring to the appendix Figure 8 As shown, the permeable channels 601 are arranged in a circular array on the surface of the permeable plate 6, and the baffle plate 8 is located between adjacent permeable channels 601; and in the initial state, the baffle plate 8 is located between adjacent permeable channels 601. When the external cooling medium enters the spray vertical pipe 3 through the water supply pipe and is sprayed onto the surface of the billet through the spray pipe head 301, the cooling medium will rapidly cool the billet. During the cooling process, the circular shaft 7 can be controlled to rotate, so that the circular shaft 7 drives multiple baffle plates 8 to rotate synchronously. The baffle plates 8 will rotate towards the side closer to the permeable trough 601, that is, the baffle plates 8 can block the permeable trough 601, so that the water outlet of the permeable trough 601 becomes smaller, which reduces the water output. Thus, the water output stage of the spray pipe head 301 is first a large flow rate and then a small flow rate. With this design, since the billet shell is only 8-15mm thick when it exits the crystallizer, the static pressure of the molten steel can easily cause bulging deformation or steel leakage. The initial high-flow-rate spray can provide high-intensity cooling, accelerate the thickening of the billet shell, and suppress the risk of deformation. As the billet shell thickens, it is necessary to avoid rapid cooling that could cause surface cracks. That is, a small flow rate of water can achieve slow cooling, reducing thermal stress cracks and internal rhomboid deformation.

[0026] Each of the spray nozzles 301 is fixedly equipped with a vent pipe 9, which is connected to an external air pump. During operation, when the spray nozzles 301 spray water through the water permeable trough 601, high-pressure gas can also be introduced into the vent pipe 9 and the interior of the spray nozzles 301 through the external air pump, so that the sprayed water is a water mist, which can improve the cooling efficiency, make the droplets finer, and distribute them more evenly.

[0027] A support frame 10 is installed at the end of the spray pipe head 301. A reciprocating screw 11 is rotatably mounted on the surface of the support frame 10. The reciprocating screw 11 is located at the center line of the spray pipe head 301. A moving block 12 is provided on the outer circumferential surface of the reciprocating screw 11. A cleaning unit is provided on the outer surface of the moving block 12. The cleaning unit is used to clean the scale inside the spray pipe head 301. The cleaning unit includes a connecting rod 13, which is fixedly installed on the outer surface of the moving block 12. Two connecting rods 13 are provided and are symmetrically designed with respect to the moving block 12. A cleaning ring 14 is installed at the end of the connecting rod 13 away from the moving block 12. The outer surface of the cleaning ring 14 contacts the inner wall of the spray pipe head 301. Two cleaning rings 14 are provided, and the cleaning part of the cleaning ring 14 contacts the inner wall of the spray pipe head 301. A recycling frame 15 is provided inside the spray pipe head 301 on the side away from the permeable plate 6. During operation, due to the high temperature of the casting billet, the spray nozzle 301 will accumulate some scale inside after a long period of cooling. Over time, this will affect the water output of the spray nozzle 301, so it needs to be cleaned. In the initial state, the cleaning ring 14 is located on the side close to the permeable plate 6, and the cleaning ring 14 is in contact with the entire spray pipe head 301. When it is necessary to clean the scale on the inner wall of the spray pipe head 301, the reciprocating screw 11 is controlled to rotate. The reciprocating screw 11 will drive the moving block 12 with its outer surface thread design to move. The moving block 12 will drive the connecting rod 13 and the cleaning ring 14 to move synchronously. The cleaning ring 14 will move along the inner wall of the spray pipe head 301 from one side of the permeable plate 6 to the side close to the recycling frame 15. The cleaning ring 14 will gradually clean the scale on the inner wall of the spray pipe head 301. The cleaned scale will fall along the annular surface of the inner wall of the spray pipe head 301 to its bottom surface and be gradually pushed into the recycling frame 15 by the cleaning ring 14. This realizes the automatic self-cleaning function of the scale on the inner wall of the spray pipe head 301, ensuring the uniformity of water output from the subsequent permeable tank 601, which is beneficial to the cooling of the casting billet.

[0028] A crushing ring 16 is rotatably disposed between the two cleaning rings 14. A crushing rod 17 arranged in a circular array is fixedly installed on the outer circumferential surface of the crushing ring 16. The end of the crushing rod 17 contacts the inner wall of the spray pipe head 301. The crushing ring 16 can rotate within the cleaning ring 14. During operation, as the cleaning ring 14 moves along the inner wall of the spray pipe head 301, the crushing ring 16 located on the inner wall of the cleaning ring 14 rotates, and the crushing ring 16 synchronously drives the crushing rod 17 to rotate, so that the crushing rod 17 can crush the hard scale in contact with it during the rotation, which improves the treatment effect of the scale. Moreover, with the subsequent movement of the cleaning ring 14, the crushed scale can be transported to the subsequent recycling box 15.

[0029] The outer wall of the cleaning ring 14 is rotatably equipped with a rotating gear 18 via a bracket, and the inner wall of the crushing ring 16 is fitted with a toothed ring 161, which meshes with the rotating gear 18. During operation, when the cleaning ring 14 moves along the inner wall of the spray pipe head 301, the rotating gear 18 can be controlled to rotate, which will drive the meshing toothed ring 161 to rotate. The toothed ring 161 will drive the crushing ring 16 and the crushing rod 17 to rotate synchronously. Then, the crushing rod 17 will crush the scale as described above, thereby improving the treatment effect on the spray pipe head 301.

[0030] The cleaning ring 14 has a limiting ring groove 19 inside. The crushing ring 16 is rotatably designed inside the limiting ring groove 19 by the limiting ring plate 20. The shape of the limiting ring plate 20 is adapted to the shape of the limiting ring groove 19. During operation, due to the design of the limiting ring groove 19 and the limiting ring plate 20, the stability of the crushing ring 16 during rotation can be improved by the mutual limiting of the two, thereby improving the cleaning effect on the inner wall of the spray pipe head 301.

[0031] The recycling frame 15 is snapped onto the bottom of the spray pipe head 301 by a limiting clip. A sealing strip is provided at the contact position between the recycling frame 15 and the spray pipe head 301. After the recycling frame 15 is snapped onto the bottom of the spray pipe head 301, it can be removed after a period of time, and the scale collected inside can be centrally processed. The operation is relatively convenient. It should be noted that all the structures mentioned in this invention are high temperature resistant structures.

[0032] Working principle: When the billet leaves the crystallizer, it forms only a thin shell and needs to be rapidly cooled by spraying cooling medium through the spray pipe to ensure complete solidification before entering the straightening machine. Specifically, when cooling the billet, the water outlet of the spray pipe head 301 is aligned with the surface of the billet, and the positioning plate 2 and the entire spray vertical pipe 3 are fixed to the side wall of the continuous casting machine body 1 by L-shaped screws 4. Therefore, the cooling medium can be introduced into the spray vertical pipe 3 through the external water inlet pipe, and then the cooling medium is transferred to the inside of the spray pipe head 301 through the spray vertical pipe 3. The spray from the spray pipe head 301 can rapidly cool the billet to ensure complete solidification before entering the straightening machine. Moreover, the spray pipe head 301 can adaptively change the water output, so that the billet is cooled by a large flow rate first, and then cooled slowly by a small flow rate. The initial large flow rate spray can provide high-intensity cooling, accelerate the thickening of the billet shell, and suppress the risk of deformation. As the billet shell thickens, it is necessary to avoid rapid cooling that could cause surface cracks, so a small flow rate of water is used to achieve slow cooling. It should be noted that before each use, it is necessary to check whether the spray nozzle 301 is on a horizontal plane. If it is not on a horizontal plane, the fastening screw 401 can be rotated to make the fastening screw 401 further cooperate with the positioning plate 2, so that the L-shaped screw 4 is adjusted to a horizontal plane design, that is, each spray nozzle 301 can be aligned, that is, the water outlet of each spray nozzle 301 is designed to be perpendicular to the billet. This avoids misalignment during spray cooling, which can lead to uneven cooling of various parts of the billet, resulting in internal quality problems such as central cracks, carbon enrichment, and carbon segregation, as well as external surface quality problems such as billet delamination and dents. When the external cooling medium enters the spray vertical pipe 3 through the water supply pipe and is sprayed onto the surface of the billet through the spray pipe head 301, the cooling medium will rapidly cool the billet. During the cooling process, the circular shaft 7 can be controlled to rotate, so that the circular shaft 7 drives multiple baffle plates 8 to rotate synchronously. The baffle plates 8 will rotate towards the side closer to the permeable trough 601, that is, the baffle plates 8 can block more of the permeable trough 601, making the water outlet of the permeable trough 601 smaller, which reduces the water output. Thus, the water output stage of the spray pipe head 301 is first a large flow rate and then a small flow rate. With this design, since the billet shell is only 8-15mm thick when it exits the crystallizer, the static pressure of the molten steel can easily cause bulging deformation or steel leakage. The initial high-flow-rate spray can provide high-intensity cooling, accelerate the thickening of the billet shell, and suppress the risk of deformation. As the billet shell thickens, it is necessary to avoid rapid cooling that could cause surface cracks. That is, controlling the water output from the 601 permeable trough can achieve slow cooling and reduce thermal stress cracks and internal rhomboid deformation. In the initial state, the cleaning ring 14 is located near the permeable plate 6 and is in contact with the entire spray pipe head 301. When it is necessary to clean the scale on the inner wall of the spray pipe head 301, the reciprocating screw 11 is rotated. The reciprocating screw 11 will drive the moving block 12 with its outer thread design to move. The moving block 12 will drive the connecting rod 13 and the cleaning ring 14 to move synchronously. The cleaning ring 14 will move along the inner wall of the spray pipe head 301 from one side of the permeable plate 6 to the side near the recycling frame 15, and the cleaning ring 14 will gradually clean the scale on the inner wall of the spray pipe head 301. The cleaned scale will be discharged along the annular surface of the inner wall of the spray pipe head 301. The scale falls to the bottom and is gradually pushed into the recycling box 15 by the cleaning ring 14, realizing the automatic self-cleaning function of the scale on the inner wall of the spray pipe head 301, ensuring the uniformity of water output from the subsequent permeable tank 601, which is beneficial to the cooling of the billet; when the cleaning ring 14 moves along the inner wall of the spray pipe head 301, the crushing ring 16 on the inner wall of the cleaning ring 14 rotates, and the crushing ring 16 drives the crushing rod 17 to rotate synchronously, so that the crushing rod 17 can crush the hard scale in contact with it during the rotation, improving the treatment effect of the scale. Moreover, with the subsequent movement of the cleaning ring 14, the crushed scale can be transported into the subsequent recycling box 15. When the cleaning ring 14 moves along the inner wall of the spray pipe head 301, the rotating gear 18 can be controlled to rotate. The rotating gear 18 will drive the meshing gear ring 161 to rotate. The gear ring 161 drives the crushing ring 16 and the crushing rod 17 to rotate synchronously. Then the crushing rod 17 will crush the scale as described above, improving the treatment effect on the spray pipe head 301. Due to the design of the limiting ring groove 19 and the limiting ring plate 20, the stability of the crushing ring 16 during the rotation process can be improved under the mutual limiting of the two, thereby improving the cleaning effect on the inner wall of the spray pipe head 301.

[0033] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A spray pipe centering device for a continuous casting machine, characterized in that: The system includes a continuous casting machine body, a positioning plate installed on the side wall of the machine body, a spray vertical pipe installed on the side wall of the positioning plate, the spray vertical pipe being connected to an external cooling medium inlet pipe, multiple L-shaped screws fixedly installed on the outer surface of the spray vertical pipe, the ends of the L-shaped screws away from the spray vertical pipe penetrating into the interior of the positioning plate, the inner wall of the positioning plate being provided with threaded grooves adapted to the L-shaped screws, and a fastening screw disc rotatably installed at the end of the L-shaped screw, the fastening screw disc being used to cooperate with the positioning plate to fix the L-shaped screw to the side wall of the positioning plate, and multiple spray pipe heads installed on the side wall of the spray vertical pipe, the spray pipe heads being able to adaptively change the water output.

2. The spray pipe centering device for a continuous casting machine according to claim 1, characterized in that: A hydraulic cylinder is installed on the side wall of the continuous casting machine body. The telescopic end of the hydraulic cylinder is connected to the bottom wall of the positioning plate. The positioning plate is slidably disposed on the side wall of the continuous casting machine body.

3. The spray pipe centering device for a continuous casting machine according to claim 1, characterized in that: The spray pipe head has a water passage chamber inside. A permeable plate is installed inside the spray pipe head and on the side near the water outlet. The surface of the permeable plate has permeable grooves arranged in a circular array. A circular shaft is rotatably installed on the side wall of the permeable plate near the center. Multiple baffles are fixedly installed on the outer circumference of the circular shaft. The baffles are used to cover the permeable grooves.

4. The spray pipe centering device for a continuous casting machine according to claim 3, characterized in that: Each of the spray nozzles is fixedly equipped with a vent pipe, which is connected to an external air pump. When the spray nozzle sprays water through the permeable trough, the external air pump can introduce high-pressure gas into the vent pipe and the inside of the spray nozzle, so that the sprayed water is a water mist.

5. The spray pipe centering device for a continuous casting machine according to claim 4, characterized in that: A support frame is installed at the end of the spray pipe head. A reciprocating screw is rotatably mounted on the surface of the support frame. The reciprocating screw is located at the center line of the spray pipe head. A moving block is provided on the outer circumference of the reciprocating screw. A cleaning unit is provided on the outer surface of the moving block. The cleaning unit is used to clean the scale inside the spray pipe head.

6. The spray pipe centering device for a continuous casting machine according to claim 5, characterized in that: The cleaning unit includes a connecting rod, which is fixedly installed on the outer surface of the moving block. Two connecting rods are provided and are symmetrically designed relative to the moving block. A cleaning ring is installed on the end of the connecting rod away from the moving block. The outer surface of the cleaning ring contacts the inner wall of the spray pipe head. Two cleaning rings are provided, and the cleaning part of the cleaning ring contacts the inner wall of the spray pipe head. A recycling frame is provided inside the spray pipe head on the side away from the permeable plate.

7. The spray pipe centering device for a continuous casting machine according to claim 6, characterized in that: A crushing ring is rotatably arranged between the two cleaning rings. Crushing rods arranged in a circular array are fixedly installed on the outer circumferential surface of the crushing ring. The ends of the crushing rods are in contact with the inner wall of the spray pipe head. The crushing ring can rotate within the cleaning ring.

8. The spray pipe centering device for a continuous casting machine according to claim 7, characterized in that: The outer wall of the cleaning ring is rotatably equipped with a rotating gear via a bracket, and the inner wall of the crushing ring is fitted with a toothed ring, which meshes with the rotating gear.

9. A spray pipe centering device for a continuous casting machine according to claim 8, characterized in that: The cleaning ring has a limiting ring groove inside, and the crushing ring is designed to rotate inside the limiting ring groove through a limiting ring plate. The shape of the limiting ring plate is adapted to the shape of the limiting ring groove.

10. A spray pipe centering device for a continuous casting machine according to claim 6, characterized in that: The recycling frame is snapped into the bottom of the spray pipe head by a limiting clip, and a sealing strip is provided at the contact position between the recycling frame and the spray pipe head.

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