A centering device for a spray pipe of a continuous casting machine

Abstract

The application relates to a continuous casting machine technical field, 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, a plurality of L-shaped screws are fixedly installed on the outer surface of the spraying vertical pipe, the end portion of the L-shaped screw away from the spraying vertical pipe penetrates into the inside of the positioning plate, a threaded groove matched with the L-shaped screw is arranged on the inner wall of the positioning plate, a fastening screw disc is rotationally arranged at the end portion of the L-shaped screw, the fastening screw disc is used for cooperating with the positioning plate to fix the L-shaped screw on the side wall of the positioning plate; the fastening screw disc is further cooperated with the positioning plate by rotating the fastening screw disc, so that the L-shaped screw is adjusted to be horizontal plane design, that is, each spraying pipe head can be centered, that is, the water outlet end of each spraying pipe head is designed to be perpendicular to the casting blank, so that the misalignment during spraying cooling is avoided, and the non-uniformity of each part of the blank cooling is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of continuous casting machine, in particular to a kind of continuous casting machine spray pipe centering device. BACKGROUND

[0002] Continuous casting machine is a kind of liquid steel is directly poured into solid billet machine, main equipment has ladle, ladle turntable, tundish, stopper mechanism, crystallizer, vibration machine, secondary cooling equipment, straightening machine, dummy bar, cutting equipment, billet device and water-cooled transmission roller etc.

[0003] Spray pipe is the important means for the rapid cooling of casting billet in secondary cooling zone, so its use effect plays a vital role in the production efficiency and product quality of continuous casting machine;Casting billet forms only thin shell when leaving crystallizer, needs to be sprayed by spray pipe cooling medium rapid cooling, ensure complete solidification before entering straightening machine, prevent steel static pressure from causing bulging deformation or leakage.

[0004] Generally, spray pipe is fixedly installed on base by support, is subjected to high temperature, vibration and corrosion of cooling water for a long time, can cause the problem of separation of fixed rod, the position of spray pipe can change, that is, the spray center and the spray position on the surface of casting billet can be inclined and misaligned, in this state, the casting billet is sprayed, which can cause uneven cooling of billet surface, which can cause internal center crack, carbon enrichment, carbon segregation and other quality problems of product, and serious surface quality problems such as billet offside and depression.

[0005] Therefore, the present application provides a kind of continuous casting machine spray pipe centering device SUMMARY

[0006] Therefore, the present application solves the problem of inclination and misalignment of spray center and spray position on the surface of casting billet in the prior art.

[0007] To solve the above technical problems, the application provides 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, a plurality of L-shaped screws are fixedly installed on the outer surface of the spraying vertical pipe, the ends of the L-shaped screws away from the spraying vertical pipe penetrate into the inside of the positioning plate, a threaded groove matched with the L-shaped screws is arranged on the inner wall of the positioning plate, a fastening disc is rotationally arranged at the end of the L-shaped screw, the fastening disc is used for cooperating with the positioning plate to fix the L-shaped screw on the side wall of the positioning plate, a plurality of spraying pipe heads are installed on the side wall of the spraying vertical pipe, the water outlet pipes of the spraying pipe heads are aligned with the surface of the casting blank, and the positioning plate and the whole spraying vertical pipe are fixed on the side wall of the continuous casting machine body through the L-shaped screws, so that the cooling medium can be introduced into the spraying vertical pipe through the external water inlet pipe, then the cooling medium is transmitted to the inside of the spraying pipe head through the spraying vertical pipe, the casting blank can be rapidly cooled through the spraying of the spraying pipe head, and the casting blank is completely solidified before entering the straightening and correcting machine; it should be noted that before each use, it is necessary to observe whether the spraying pipe head is on the horizontal plane, if not, the fastening disc can be rotated to make the fastening disc further cooperate with the positioning plate, so that the L-shaped screw is adjusted to be horizontal, that is, each spraying pipe head can be centered, that is, the water outlet end of each spraying pipe head is designed to be perpendicular to the casting blank, so that the centering during spraying cooling is avoided, the unevenness of each part of the blank during cooling is avoided, and the internal center crack, carbon enrichment, carbon segregation and other quality problems of the product and the external blank off-square, depression and other surface quality problems are avoided.

[0008] In an embodiment of the application, an oil cylinder is installed on the side wall of the continuous casting machine body, the telescopic end of the oil cylinder is connected with the bottom wall of the positioning plate, and the positioning plate is slidably arranged on the side wall of the continuous casting machine body.

[0009] In an embodiment of the application, a water passing cavity is arranged in the inside of the spraying pipe head, a water passing plate is installed on one side of the inside of the spraying pipe head close to the water outlet end, a plurality of water passing grooves in a circumferential array are arranged on the surface of the water passing plate, a circular shaft is rotationally arranged on the side wall of the water passing plate, a plurality of shielding plates are fixedly installed on the outer circumferential surface of the circular shaft, and the shielding plates are used for shielding the water passing grooves; when the external cooling medium enters the spraying vertical pipe through the water supply pipe and is sprayed to the surface of the casting blank through the spraying pipe head, the cooling medium can rapidly cool the casting blank, and in the cooling process, the rotation of the circular shaft can be controlled to drive the plurality of shielding plates to synchronously rotate, the shielding plates can rotate to the side close to the water passing grooves, that is, the shielding plates can shield more water passing grooves, that is, the water outlet amount can be reduced, that is, the water outlet amount of the water passing grooves can be reduced, and the water outlet stage of the spraying pipe head is large flow rate water outlet first and small flow rate water outlet later.

[0010] In one embodiment of the present application, the surface of each of the spray pipe heads is fixedly provided with an air pipe connected with an external air pump; when the spray pipe head sprays water through the water-permeable tank, the external air pump is used to introduce high-pressure gas into the air pipe and the interior of the spray pipe head, so that the sprayed water is water mist, the cooling efficiency is improved, the mist droplets are finer, and the distribution is more uniform.

[0011] In one embodiment of the present application, the end of the spray pipe head is provided with a support frame, the surface of the support frame is rotatably provided with a reciprocating screw rod, the reciprocating screw rod is arranged at the center line of the spray pipe head, the outer circumferential surface of the reciprocating screw rod is provided with a moving block, the outer surface of the moving block is provided with a cleaning unit, and the cleaning unit is used to clean the scale in the interior of the spray pipe head.

[0012] In one embodiment of the present application, the cleaning unit comprises connecting rods fixedly installed on the outer surface of the moving block, the connecting rods are symmetrically arranged relative to the moving block, the end of the connecting rod away from the moving block is provided with a cleaning ring, the outer surface of the cleaning ring is in contact with the inner wall of the spray pipe head, the cleaning ring is arranged in two and is in contact with the entire spray pipe head, and the side of the interior of the spray pipe head away from the water-permeable plate is provided with a recovery frame; in the initial state, the cleaning ring is located on the side close to the water-permeable plate, and the cleaning part of the cleaning ring is in contact with the inner wall of the spray pipe head; when the scale on the inner wall of the spray pipe head needs to be cleaned, the reciprocating screw rod is controlled to rotate, the moving block with the thread design on the outer surface of the reciprocating screw rod is driven to move, the moving block drives the connecting rod and the cleaning ring to move synchronously, the cleaning ring moves along the inner wall of the spray pipe head from the side of the water-permeable plate to the side close to the recovery frame, the cleaning ring gradually cleans the scale on the inner wall of the spray pipe head, the cleaned scale falls to the bottom surface of the spray pipe head along the annular surface of the inner wall of the spray pipe head and is gradually pushed into the interior of the recovery frame by the cleaning ring, the self-cleaning function of the scale on the inner wall of the spray pipe head is realized, the uniformity of the water outlet of the water-permeable tank is ensured, and the cooling of the cast blank is facilitated.

[0013] In one embodiment of the present application, the inner wall of the cleaning ring is rotatably provided with a crushing ring, the outer circumferential surface of the crushing ring is fixedly provided with crushing rods arranged in a circumferential array, the end of the crushing rod is in contact with the inner wall of the spray pipe head, and the crushing ring can rotate in the cleaning ring; when the cleaning ring moves along the inner wall of the spray pipe head, the crushing ring in the inner wall of the cleaning ring rotates, and the crushing ring drives the crushing rod to rotate synchronously, so that the crushing rod can crush the hard scale in contact with the crushing rod in the rotating process, the treatment effect of the scale is improved, and the crushed scale can be transported into the subsequent recovery frame under the subsequent movement of the cleaning ring.

[0014] In one embodiment of the present application, the outer wall of the cleaning ring is provided with a rotating gear through a support, the inner wall of the breaking ring is provided with a gear ring, and the gear ring and the rotating gear are in meshing connection; during operation, when the cleaning ring moves along the inner wall of the spray pipe head, the rotating gear is controlled to rotate, the rotating gear drives the gear ring in meshing connection to rotate, the gear ring drives the breaking ring and the breaking rod to rotate synchronously, and then the breaking rod breaks the scale as described above, thereby improving the processing effect on the spray pipe head.

[0015] In one embodiment of the present application, the inside of the cleaning ring is provided with a limiting ring groove, and the breaking ring is designed to rotate in the limiting ring groove through a limiting ring plate.

[0016] In one embodiment of the present application, the recovery frame is clamped to the bottom of the spray pipe head through a limiting clamp, and a sealing strip is arranged at the position where the recovery frame contacts the spray pipe head.

[0017] The above technical scheme of the present application has the following advantages compared with the prior art:

[0018] The centering device for the spray pipe of the continuous casting machine needs to observe whether the spray pipe head is on the horizontal plane before each use, and if not, the fastening disc is rotated to further cooperate with the positioning plate, so that the L-shaped screw rod is adjusted to be horizontal, that is, each spray pipe head can be centered, that is, the water outlet end of each spray pipe head is perpendicular to the casting blank, thereby avoiding misalignment during spray cooling, causing uneven cooling of each part of the blank, and causing internal center cracks, carbon enrichment, carbon segregation and other quality problems of the product, and external blank off-square, depression and other surface quality problems.

[0019] The centering device for the spray pipe of the continuous casting machine controls the rotation of the reciprocating screw rod, the reciprocating screw rod drives the moving block designed on the outer surface to move, the moving block drives the connecting rod and the cleaning ring to move synchronously, the cleaning ring moves along the inner wall of the spray pipe head from one side of the water permeable plate to the side close to the recovery frame, the cleaning ring gradually cleans the scale on the inner wall of the spray pipe head, the cleaned scale falls to the bottom surface of the spray pipe head along the annular surface of the inner wall, and is gradually pushed into the recovery frame by the cleaning ring, thereby realizing the self-cleaning function of the scale on the inner wall of the spray pipe head, ensuring the uniformity of the water outlet of the water permeable tank, and being beneficial to the cooling of the casting blank. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to make the content of the present application more easily understood, the present application will be further described in detail below according to specific embodiments of the present application and in conjunction with the drawings.

[0021] Figure 1is a schematic diagram of the three-dimensional structure of the present application;

[0022] Figure 2 is a schematic diagram of the L-shaped screw structure of the present application;

[0023] Figure 3 is a schematic diagram of the oil cylinder structure of the present application;

[0024] Figure 4 is a schematic diagram of the spray pipe head structure of the present application;

[0025] Figure 5 is a schematic diagram of the water-permeable plate structure of the present application;

[0026] Figure 6 is a schematic diagram of the connecting rod structure of the present application;

[0027] Figure 7 is a schematic diagram of the water-permeable plate structure of the present application;

[0028] Figure 8 is a schematic diagram of the shielding plate structure of the present application;

[0029] Figure 9 is a schematic diagram of the crushing ring structure of the present application;

[0030] Figure 10 is a schematic diagram of the reciprocating screw structure of the present application;

[0031] Figure 11 is an enlarged view of structure A in the present application. Figure 10

[0032] Description of the figures: 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, oil cylinder; 6, water-permeable plate; 601, water-permeable groove; 7, round shaft; 8, shielding plate; 9, air pipe; 10, support frame; 11, reciprocating screw; 12, moving block; 13, connecting rod; 14, cleaning ring; 15, recycling frame; 16, crushing ring; 161, tooth ring; 17, crushing rod; 18, rotating gear; 19, limiting ring groove; 20, limiting ring plate. DETAILED DESCRIPTION

[0033] The present application will be further described below in conjunction with the drawings and specific examples, so that those skilled in the art can better understand the present application and implement it, but the examples are not limiting to the present application.

[0034] Reference Figures 1 to 11 ​As shown, the centering device for the spray pipe of the continuous casting machine comprises 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 end of the L-shaped screw 4 away from the spray vertical pipe 3 penetrates into the inside of the positioning plate 2, a threaded groove matched with the L-shaped screw 4 is arranged on the inner wall of the positioning plate 2, a fastening screw disc 401 is rotationally arranged at the end of the L-shaped screw 4, the fastening screw disc 401 is used for cooperating with the positioning plate 2 to fix the L-shaped screw 4 on 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, and the spray pipe head 301 can adaptively change the water output.

[0035] When working, the casting blank only forms a thin shell when leaving the crystallizer, needs to be rapidly cooled by the spray pipe to ensure complete solidification before entering the straightening and correcting machine, and the water outlet pipe of the spray pipe head 301 is aligned with the surface of the casting blank, and the positioning plate 2 and the whole spray vertical pipe 3 are fixed on the side wall of the continuous casting machine body 1 through the L-shaped screw 4, so that the cooling medium can be introduced into the spray vertical pipe 3 through the external water inlet pipe, then the cooling medium is transmitted to the inside of the spray pipe head 301 through the spray vertical pipe 3, the casting blank can be rapidly cooled through the spraying of the spray pipe head 301, complete solidification before entering the straightening and correcting machine is ensured, the spray pipe head 301 can adaptively change the water output, the casting blank can be cooled at a large flow rate first and then at a small flow rate slowly, the high-strength cooling can be provided by the initial large-flow spraying to accelerate the thickening of the shell and inhibit the deformation risk, and slow cooling can be realized when the water is discharged at a small flow rate to avoid surface cracks caused by rapid cooling.

[0036] It should be noted that, in the embodiment of the present application, the "centering" means that the included angle between the water outlet end of the spray pipe head 301 and the surface of the casting blank is ninety degrees, before each use, it is necessary to observe whether the spray pipe head 301 is on the horizontal plane, if not, the fastening screw disc 401 can be rotated to make the fastening screw disc 401 further cooperate with the positioning plate 2, so that the L-shaped screw 4 is adjusted to be horizontal, that is, each spray pipe head 301 can be centered, that is, the water outlet end of each spray pipe head 301 is perpendicular to the surface of the casting blank, so as to avoid the misalignment during the spray cooling, so as to avoid the uneven cooling of the casting blank, and to cause the internal center crack, carbon enrichment, carbon segregation and other quality problems of the product, and the external off-square, depression and other surface quality problems of the casting blank.

[0037] The side wall of the continuous casting machine body 1 is provided with an oil cylinder 5, the telescopic end of the oil cylinder 5 is connected with the bottom wall of a positioning plate 2, and the side of the positioning plate 2 is slidably arranged on the side wall of the continuous casting machine body 1; in operation, the telescopic end of the oil cylinder 5 drives the positioning plate 2 to move up and down, so that the positioning plate 2 drives the spray vertical pipe 3 and the spray pipe head 301 to move up and down, thereby increasing the cooling area of the surface of the casting blank.

[0038] The inside of the spray pipe head 301 is provided with a water passing cavity, one side of the inside of the spray pipe head 301 close to the water outlet end is provided with a water passing plate 6, the surface of the water passing plate 6 is provided with water passing grooves 601 arranged in a circumferential array, and the side wall of the water passing plate 6 is rotatably provided with a circular shaft 7, the outer circumferential surface of the circular shaft 7 is fixedly provided with a plurality of shielding plates 8, and the shielding plates 8 are used for shielding the water passing grooves 601.

[0039] It should be noted that, referring to the accompanying drawings Figure 8 The water passing grooves 601 are arranged in a circumferential array on the surface of the water passing plate 6, and the shielding plates 8 are located between adjacent water passing grooves 601; and in the initial state, the shielding plates 8 are located between adjacent water passing grooves 601.

[0040] When the external cooling medium enters the spray vertical pipe 3 through the water supply pipe and is sprayed to the surface of the casting blank through the spray pipe head 301, the cooling medium can rapidly cool the casting blank, and in the cooling process, the circular shaft 7 can be controlled to rotate, so that the circular shaft 7 drives the plurality of shielding plates 8 to rotate synchronously, the shielding plates 8 rotate towards the side close to the water passing grooves 601, that is, the shielding plates 8 can shield the water passing grooves 601, so that the water outlet holes of the water passing grooves 601 become smaller, that is, the water outlet amount can be reduced, so that the water outlet stage of the spray pipe head 301 is first large-flow water outlet and then small-flow water outlet.

[0041] In this way, since the blank shell is only 8-15mm thick when the casting blank is discharged from the crystallizer, the static pressure of the molten steel is easy to cause bulging deformation or molten steel leakage, the initial large-flow injection can provide high-strength cooling and accelerate the thickening of the blank shell, and the risk of deformation is inhibited; as the blank shell thickens, the surface cracks caused by rapid cooling need to be avoided at this time, that is, small-flow water outlet, which can achieve slow cooling and reduce thermal stress cracks and internal diamondization.

[0042] The surface of each spray pipe head 301 is fixedly provided with an air pipe 9, the air pipe 9 is connected with an external air pump, and in operation, when the spray pipe head 301 sprays water through the water passing grooves 601, high-pressure gas can also be introduced into the air pipe 9 and the inside of the spray pipe head 301 through the external air pump at this time, so that the sprayed water is water mist, which can improve the cooling efficiency, make the mist droplets finer and more uniform.

[0043] The end of the spray pipe head 301 is provided with a support frame 10, the surface of the support frame 10 is rotationally provided with a reciprocating screw rod 11, the reciprocating screw rod 11 is arranged at the center line of the spray pipe head 301, the outer circumferential surface of the reciprocating screw rod 11 is provided with a moving block 12, the outer surface of the moving block 12 is provided with a cleaning unit for cleaning the scale in the interior of the spray pipe head 301; the cleaning unit comprises a connecting rod 13 fixedly installed on the outer surface of the moving block 12, the connecting rod 13 is provided with two and is symmetrically designed with respect to the moving block 12, the end of the connecting rod 13 away from the moving block 12 is provided with a cleaning ring 14, the outer surface of the cleaning ring 14 is in contact with the inner wall of the spray pipe head 301, the cleaning ring 14 is provided with two, and the cleaning part of the cleaning ring 14 is in contact with the inner wall of the spray pipe head 301, the interior of the spray pipe head 301 away from the water permeable plate 6 is provided with a recovery frame 15;

[0044] When working, since the casting blank is high temperature, the interior of the spray pipe head 301 will exist some scale under long time cooling, which will affect the water outlet effect of the spray pipe head 301 for a long time, so it needs to be cleaned;

[0045] In the initial state, the cleaning ring 14 is located on the side close to the water permeable plate 6, and the cleaning ring 14 contacts the entire spray pipe head 301; when the scale on the inner wall of the spray pipe head 301 needs to be cleaned, the reciprocating screw rod 11 is controlled to rotate at this time, the reciprocating screw rod 11 drives the moving block 12 with a thread design on the outer surface to move, the moving block 12 drives the connecting rod 13 and the cleaning ring 14 to move synchronously, the cleaning ring 14 moves along the inner wall of the spray pipe head 301 from one side of the water permeable plate 6 to the side close to the recovery frame 15, and the cleaning ring 14 gradually cleans the scale on the inner wall of the spray pipe head 301, the cleaned scale falls to the bottom surface along the annular surface of the inner wall of the spray pipe head 301 and is gradually pushed into the interior of the recovery frame 15 by the cleaning ring 14, realizing the self-cleaning function of the scale on the inner wall of the spray pipe head 301, ensuring the uniformity of the water outlet of the subsequent water permeable tank 601, and being beneficial to the cooling of the casting blank.

[0046] The two cleaning rings 14 are rotationally provided with a crushing ring 16, the outer circumferential surface of the crushing ring 16 is fixedly provided with a crushing rod 17 in a circumferential array design, the end of the crushing rod 17 is in contact with the inner wall of the spray pipe head 301, and the crushing ring 16 can rotate in the cleaning ring 14;

[0047] When working, the broken ring 16 at the inner wall of the cleaning ring 14 rotates when the cleaning ring 14 moves along the inner wall of the shower pipe head 301, and the broken ring 16 synchronously drives the broken rod 17 to rotate, so that the broken rod 17 can break the hard scale body in contact with it during rotation, improving the treatment effect of the scale body, and under the subsequent movement of the cleaning ring 14, the broken scale body can be transported to the inside of the subsequent recovery frame 15.

[0048] The outer wall of the cleaning ring 14 is provided with a rotating gear 18 through a support, the inner wall of the broken ring 16 is provided with a gear ring 161, and the gear ring 161 and the rotating gear 18 are in meshing connection; when working, when the cleaning ring 14 moves along the inner wall of the shower pipe head 301, the rotating gear 18 can be controlled to rotate, the rotating gear 18 drives the gear ring 161 in meshing connection therewith to rotate, the gear ring 161 drives the broken ring 16 and the broken rod 17 to synchronously rotate, and then the broken rod 17 breaks the scale body as described above, improving the treatment effect of the shower pipe head 301.

[0049] The inside of the cleaning ring 14 is provided with a limiting ring groove 19, the broken ring 16 is rotationally arranged in the limiting ring groove 19 through a limiting ring plate 20, and the limiting ring plate 20 is matched with the limiting ring groove 19 in shape; when working, since the limiting ring groove 19 and the limiting ring plate 20 are designed, the stability of the broken ring 16 during rotation can be improved under the mutual limiting of the two, thereby improving the cleaning effect of the inner wall of the shower pipe head 301.

[0050] The recovery frame 15 is clamped to the bottom of the shower pipe head 301 through a limiting clamp, and the recovery frame 15 is provided with a sealing strip at the position in contact with the shower pipe head 301; the recovery frame 15 is clamped to the bottom of the shower pipe head 301, and in a period of time, the recovery frame 15 can be taken out, and the scale body collected in the recovery frame 15 can be concentratedly treated, which is relatively convenient to operate; it should be noted that all the structures mentioned in the application are high-temperature-resistant structures.

[0051] Working principle: The casting blank leaves the crystallizer only to form a thin shell, which needs to be quickly cooled by spraying cooling medium through the spray pipe to ensure complete solidification before entering the straightening machine. Specifically, when cooling the casting blank, the water outlet pipe of the spray pipe head 301 is aligned with the surface of the casting blank, 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 through the L-shaped screw rod 4. Therefore, the cooling medium can be introduced into the spray vertical pipe 3 through the external water inlet pipe, and then transmitted to the inside of the spray pipe head 301 through the spray vertical pipe 3. The casting blank can be quickly cooled by the spraying of the spray pipe head 301, ensuring complete solidification before entering the straightening machine. Moreover, the spray pipe head 301 can adaptively change the water output, allowing the casting blank to be cooled at a large flow rate first and then at a small flow rate slowly. The initial large flow rate of the spray energy provides high-intensity cooling, accelerates the thickening of the shell, and suppresses the risk of deformation. As the shell thickens, it is necessary to avoid rapid cooling that causes surface cracks, i.e., small flow rate of water, which can achieve slow cooling.

[0052] It should be noted that before each use, it is necessary to observe whether the spray pipe head 301 is on the horizontal plane. If it is not on the horizontal plane, the tightening screw disc 401 can be rotated to further cooperate with the positioning plate 2, so that the L-shaped screw rod 4 is adjusted to the horizontal plane design. That is, each spray pipe head 301 can be centered, i.e., the water outlet end of each spray pipe head 301 is designed to be perpendicular to the casting blank. This avoids misalignment during spray cooling, which can cause uneven cooling of the casting blank, resulting in internal center cracks, carbon enrichment, carbon segregation, and other quality problems in the product, as well as external slabbing, depression, and other surface quality problems.

[0053] When the external cooling medium enters the spray vertical pipe 3 through the water supply pipe and is sprayed onto the surface of the casting blank through the spray pipe head 301, the cooling medium can quickly cool the casting blank. During the cooling process, the circular shaft 7 can be controlled to rotate, causing the circular shaft 7 to drive the plurality of shielding plates 8 to rotate synchronously. The shielding plates 8 will rotate towards the side close to the water-permeable groove 601, i.e., the shielding plates 8 can shield more water-permeable grooves 601, causing the water outlet holes of the water-permeable grooves 601 to become smaller, i.e., the water output can be reduced. In this way, the water outlet stage of the spray pipe head 301 is first large flow rate and then small flow rate.

[0054] With this design, since the shell of the casting blank is only 8-15 mm thick when it leaves the crystallizer, the static pressure of the molten steel is prone to cause bulging deformation or steel leakage. The initial large flow rate of the spray energy provides high-intensity cooling, accelerates the thickening of the shell, and suppresses the risk of deformation. As the shell thickens, it is necessary to avoid rapid cooling that causes surface cracks, i.e., control the water outlet of a small number of water-permeable grooves 601 to achieve slow cooling, reduce thermal stress cracks and internal diamondization.

[0055] In the initial state, the cleaning ring 14 is located near one side of the water permeable plate 6, and the cleaning ring 14 contacts the entire shower pipe head 301; when the scale on the inner wall of the shower pipe head 301 needs to be cleaned, the reciprocating screw rod 11 is controlled to rotate at this time, the reciprocating screw rod 11 will drive the moving block 12 with a threaded design on the outer surface 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 shower pipe head 301 from one side of the water permeable plate 6 to the side close to the recovery frame 15, and the cleaning ring 14 will gradually clean the scale on the inner wall of the shower pipe head 301, and the cleaned scale will fall to the bottom surface along the annular surface of the inner wall of the shower pipe head 301 and be gradually pushed into the recovery frame 15 by the cleaning ring 14, realizing the self-cleaning function of the scale on the inner wall of the shower pipe head 301, ensuring the uniformity of the water flowing out of the water permeable tank 601 in the subsequent process, and being beneficial to the cooling of the cast blank; when the cleaning ring 14 moves along the inner wall of the shower pipe head 301, the broken ring 16 on the inner wall of the cleaning ring 14 rotates, and the broken ring 16 will synchronously drive the broken rod 17 to rotate, so that the broken rod 17 can break the hard scale in contact with it during rotation, improving the treatment effect of the scale, and under the subsequent movement of the cleaning ring 14, the broken scale can be transported into the subsequent recovery frame 15.

[0056] When the cleaning ring 14 moves along the inner wall of the shower pipe head 301, the rotating gear 18 can be controlled to rotate at this time, the rotating gear 18 will drive the gear ring 161 engaged therewith to rotate, the gear ring 161 drives the broken ring 16 and the broken rod 17 to rotate synchronously, and then the broken rod 17 breaks the scale as described above, improving the treatment effect of the shower pipe head 301; due to the design of the limiting ring groove 19 and the limiting ring plate 20, the stability of the broken ring 16 during rotation can be improved under the mutual limiting of the two, thereby improving the cleaning effect of the inner wall of the shower pipe head 301.

[0057] Obviously, the above embodiments are only examples for clearly illustrating, and are not a limitation on the embodiments. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A device for centering a spray pipe of a continuous caster, characterized in that: The utility model provides a continuous casting machine body, the side wall of continuous casting machine body is equipped with the positioning plate, the side wall of positioning plate is equipped with the spray vertical tube, the spray vertical tube is connected with the water inlet pipe of external cooling medium, the outer surface of spray vertical tube is fixedly installed with a plurality of L type screw rods, the end of L type screw rod is far away from spray vertical tube and penetrates to the inside of positioning plate, the inner wall of positioning plate is provided with the thread groove matched with L type screw rod, the end of L type screw rod is rotatably provided with the fastening screw disc, and the fastening screw disc is used for cooperation with positioning plate and fixes L type screw rod on the side wall of positioning plate, the side wall of spray vertical tube is equipped with a plurality of spray pipe heads, and the spray pipe head can adaptively change the water output; The end of the spray pipe head is provided with a support frame, a reciprocating screw rod is rotatably arranged on the surface of the support frame, the reciprocating screw rod is arranged at the center line of the spray pipe head, a moving block is arranged on the outer periphery of the reciprocating screw rod, a cleaning unit is arranged on the outer surface of the moving block, and the cleaning unit is used for cleaning scale in the spray pipe head. The cleaning unit comprises a connecting rod, the connecting rod is fixedly installed on the outer surface of the moving block, the connecting rod is provided with two and is symmetrically designed with respect to the moving block, a cleaning ring is installed at the end of the connecting rod away from the moving block, the outer surface of the cleaning ring is in contact with the inner wall of the spray pipe head, the cleaning ring is provided with two, and the cleaning part of the cleaning ring is in contact with the inner wall of the spray pipe head; a crushing ring is rotatably arranged between the two cleaning rings, a plurality of crushing rods are fixedly installed on the outer periphery of the crushing ring in a circumferential array, the end of the crushing rod is in contact with the inner wall of the spray pipe head, and the crushing ring can rotate in the cleaning ring.

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

3. A device for centering a spray pipe of a continuous casting machine according to claim 1, characterized in that: A water passage is formed in the inside of the spray pipe head, a water permeable plate is installed on one side of the inside of the spray pipe head close to the water outlet end, a plurality of water permeable grooves are formed in a circumferential array on the surface of the water permeable plate, a circular shaft is rotatably arranged on the side wall of the water permeable plate, a plurality of shielding plates are fixedly installed on the outer periphery of the circular shaft, and the shielding plates are used for shielding the water permeable grooves; a recycling frame is arranged on the side of the inside of the spray pipe head away from the water permeable plate.

4. A device for centering a spray pipe of a continuous casting machine according to claim 3, characterized in that: An air pipe is fixedly installed on the surface of each spray pipe head, the air pipe is connected with an external air pump, when the spray pipe head sprays water through the water permeable grooves, high-pressure gas is introduced into the air pipe and the inside of the spray pipe head through the external air pump, so that the sprayed water is water mist.

5. The apparatus of claim 1 wherein: The outer wall of the cleaning ring is rotatably provided with a rotating gear through a support, a tooth ring is installed on the inner wall of the crushing ring, and the tooth ring and the rotating gear are engagedly connected.

6. A device for centering a spray pipe of a continuous caster as defined in claim 1, characterized in that: A limiting ring groove is formed in the inside of the cleaning ring, and the crushing ring is rotatably arranged in the limiting ring groove through a limiting ring plate.

7. A device for centering a spray pipe of a continuous caster as defined in claim 3, characterized in that: The recycling frame is clamped at the bottom of the spray pipe head through a limiting clamp, and a sealing strip is arranged at the contact position of the recycling frame and the spray pipe head.

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