Secondary cooling spraying and width cutting control device for bent section of slab continuous casting machine

Abstract

The utility model discloses a secondary cooling spray amplitude cutting control device for a bending section of a slab continuous casting machine, which belongs to the technical field of cooling of continuous casting machines and comprises a continuous casting machine body, a secondary cooling arc-shaped fan-shaped section of the continuous casting machine and cooling mechanisms arranged on the arc-shaped fan-shaped section, and each cooling mechanism comprises two side cooling components and a middle cooling component. The edge cooling assembly comprises a plurality of first spraying mechanisms, the middle cooling assembly comprises a second spraying mechanism, the spraying range of each area can be adjusted according to the different width sizes of the casting blanks, and the phenomenon that the corners of the casting blanks are cracked due to non-uniform cooling of the corners of the casting blanks is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of continuous casting machine cooling, and particularly relates to a secondary cooling spray width cutting control device for the bending section of a slab continuous casting machine. Background Technique

[0002] The slab continuous casting machine realizes secondary cooling by regularly installing a spray pipe cooling system on the inner arc and outer arc of the segment, and uses the cooling water directly sprayed onto the surface of the casting blank as the cooling medium. Since the slab continuous casting machine has the ability to produce different cross-section specifications, during the actual production process, it is necessary to frequently switch the width of the continuous casting blank cross-section. When the width of the casting blank is adjusted from a large width to a smaller width cross-section, affected by the nozzle flow rate, the cooling water volume sprayed from the spray pipe to the surface of the corner of the casting blank increases, the cooling of the corner of the casting blank intensifies, the cooling intensity of the casting blank is uneven, and the probability of cracks appearing on the surface of the corner of the casting blank increases. The unreasonable configuration of the water volume in the secondary cooling zone is the direct cause of uneven cooling. Due to the unreasonable configuration of the secondary cooling water volume, the temperature gradient at adjacent positions during the solidification process of the casting blank is large, and the generated thermal stress will also cause defects such as intermediate cracks. Therefore, in continuous casting production, in order to ensure the quality and output of the casting blank, it is necessary to reasonably distribute each circuit in the secondary cooling section and control the water volume of each circuit.

[0003] Therefore, in order to prevent overcooling of the corners of the continuous casting slab, it is necessary to set a certain spray width cutting amount. However, when the width cutting amount is too large, the temperature of the corners of the continuous casting slab rises severely when passing through the arc section, the grains will become coarser, the corner structure is damaged, and transverse cracks are likely to occur. At this time, the part of the continuous casting slab where the temperature rises bulges outwards, while the part where the temperature does not rise contracts inwards due to cooling, and transverse cracks occur at the junction due to tensile stress.

[0004] At the current stage, the spray width cutting equipment cannot adjust the spray range of each area according to the different sizes of the casting blank width, resulting in uneven cooling of the corners of the casting blank and prone to crack problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a secondary cooling spray width cutting control device for the bending section of a slab continuous casting machine to solve at least one aspect of the problems raised in the above-mentioned prior art.

[0006] A secondary cooling spray width cutting control device for the bending section of a slab continuous casting machine is provided. Side spray pipes are arranged on both sides of the arc segment of the continuous casting machine body, and a number of first spray mechanisms are arranged on each side spray pipe. A middle spray pipe is arranged in the middle of the arc segment of the continuous casting machine body, and a number of second spray mechanisms are arranged on the middle spray pipe.

[0007] Furthermore, the first spraying mechanism includes a first support frame, on which a first arc-shaped groove is provided. A first sliding block is slidably connected in the first arc-shaped groove, and a first spraying pipe is fixedly connected to the first sliding block. The first spraying pipe is fixedly connected to a side spraying pipe through a first hose, and a first nozzle is detachably connected below the first spraying pipe.

[0008] Furthermore, a first mounting hole is provided on the first support frame, and a first limiting hole is provided on the first sliding block. A fastening bolt passing through the first mounting hole and the first limiting hole is provided on the first support frame.

[0009] Furthermore, a first regulating valve is provided on each of the first spraying pipes.

[0010] Furthermore, the second spraying mechanism includes a second support frame, on which a second arc-shaped groove is provided. A second sliding block is slidably connected in the second arc-shaped groove, and a second spraying pipe is fixedly connected to the second sliding block. The second spraying pipe is fixedly connected to a middle spraying pipe through a second hose, and a second nozzle is detachably connected below the second spraying pipe.

[0011] Furthermore, a second regulating valve is provided on each of the second spraying pipes.

[0012] Furthermore, a second mounting hole is provided on the second support frame, and a second limiting hole is provided on the second sliding block. A fastening bolt passing through the second mounting hole and the second limiting hole is provided on the second support frame.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] Each section of the arc-shaped segment in the secondary cooling zone of the continuous casting machine is divided into an independent cooling zone. A side cooling component and a middle cooling component are provided above. The middle part is divided into multiple second spraying mechanisms, and the side part is divided into multiple first spraying mechanisms. By using a number of first spraying mechanisms and second spraying mechanisms, the water spraying amount and air-water ratio for cooling the casting blank internally are controlled separately, and the two side parts and the middle part of the casting blank are sprayed. It is possible to adjust the spraying range of each area according to the different sizes of the width of the casting blank, avoiding uneven cooling at the corners of the casting blank and preventing the occurrence of corner cracks in the casting blank. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] For the convenience of those skilled in the art to understand, the present utility model will be further described below with reference to the accompanying drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure of a secondary cooling spray width cutting control device for a slab continuous casting machine bending section;

[0017] Figure 2Schematic structural diagram of the first spray mechanism provided by the present utility model;

[0018] Figure 3 Schematic structural diagram of the second spray mechanism provided by the present utility model.

[0019] In the figure: 1, continuous casting machine body; 2, side spray pipe; 3, first spray mechanism; 31, first support frame; 311, first mounting hole; 32, first arc groove; 33, first sliding block; 331, first limiting hole; 34, first spray pipe; 35, first hose; 36, first nozzle; 4, middle spray pipe; 5, second spray mechanism; 51, second support frame; 511, second mounting hole; 52, second arc groove; 53, second sliding block; 531, second limiting hole; 54, second spray pipe; 55, second hose; 56, second nozzle; 6, first regulating valve; 7, second regulating valve; 8, angle dial; 9, indicating needle. Detailed implementation manners

[0020] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model, that is, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Usually, the components of the embodiments of the present utility model described and shown in the accompanying drawings herein can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model.

[0022] Please refer to Figures 1-3 As shown, in the embodiment of the present utility model, a secondary cooling spray width cutting control device for the bending section of a slab continuous casting machine includes a continuous casting machine body 1. Side spray pipes 2 are arranged on both sides of the arc-shaped segment of the continuous casting machine body 1. A plurality of first spray mechanisms 3 are arranged on each side spray pipe 2. A middle spray pipe 4 is arranged in the middle of the arc-shaped segment of the continuous casting machine body 1. A plurality of second spray mechanisms 5 are arranged on the middle spray pipe 4;

[0023] The arc-shaped segment of the continuous casting machine body 1 is divided into several independent cooling zones, and each cooling zone is independently controlled by the spraying mechanisms at the edges and in the middle. The first spraying mechanism 3 (for cooling the edges of the billet) is installed on the edge spraying pipe 2, and the second spraying mechanism 5 (for cooling the middle of the billet) is installed on the middle spraying pipe 4. Each spraying mechanism can independently adjust the water spraying volume and the air-water ratio, precisely control the spraying range. According to the different widths of the billets, the spraying range can be adjusted to ensure uniform cooling of the edges and the middle of the billets. By adjusting the spraying amplitude, overcooling or uneven cooling at the corners of the billets can be avoided, preventing the generation of corner cracks. By optimizing the cooling control, the thermal stress and thermal cracks on the surface of the billets can be reduced, improving the internal quality of the billets. The independent control of the edges and the middle can adapt to billets of different specifications, improving the overall uniformity and quality stability of the billets.

[0024] In one embodiment, refer to Figure 1 and Figure 2 , the first spraying mechanism 3 includes a first support frame 31. A first arc-shaped groove 32 is provided on the first support frame 31. A first sliding block 33 is slidably connected in the first arc-shaped groove 32. A first spraying pipe 34 is fixedly connected to the first sliding block 33. The first spraying pipe 34 is fixedly connected to the edge spraying pipe 2 through a first hose 35. A first nozzle 36 is detachably connected below the first spraying pipe 34. The sliding of the first sliding block 33 in the first arc-shaped groove 32 allows the angle and position of the first spraying pipe 34 to be adjusted. This adjustment permits the adjustment of the spraying area according to actual needs, improving the accuracy and uniformity of spraying, precisely controlling the spraying area. By adjusting the position of the first sliding block 33, the spraying direction of the first spraying pipe 34 is changed to ensure proper cooling of different parts of the billet, avoiding the problems of overcooling or insufficient cooling at the edges. The first nozzle 36 is detachably connected, facilitating the cleaning, replacement or adjustment of the nozzle to adapt to different cooling requirements or to replace different types of nozzles. The first spraying pipe 34 is connected through the first hose 35, enabling the stability of the water source connection to be maintained during the adjustment process.

[0025] In one embodiment, refer to Figure 1 and Figure 2, a first mounting hole 311 is provided on the first support frame 31, a first limiting hole 331 is provided on the first sliding block 33, and a fastening bolt passing through the first mounting hole 311 and the first limiting hole 331 is provided on the first support frame 31. By loosening the fastening bolt, the operator can make the first sliding block 33 slide in the first arc-shaped groove 32. According to the cooling requirement, the first sliding block 33 is adjusted to a suitable position so that the angle and direction of the first spray pipe 34 achieve the best spraying effect. After the adjustment is completed, the fastening bolt is tightened to fix the first sliding block 33 on the first support frame 31. Ensure that the first spray pipe 34 maintains a stable spraying angle and position during the cooling process. During maintenance, the first spray pipe 34 and the first sliding block 33 can be adjusted or replaced by loosening the fastening bolt. After the adjustment is completed, the fastening bolt is tightened again to restore the system to the working state..

[0026] In one embodiment, please refer to Figure 1 and Figure 2 , a first regulating valve 6 is provided on each of the first spray pipes 34. The first regulating valve 6 allows the operator to precisely control the water flow rate in the first spray pipe 34. Each regulating valve can be adjusted according to the need for slab cooling, so as to optimize the sprayed water volume and flexibly adjust the spraying range. By adjusting each first regulating valve 6, the water volume on the first spray pipe 34 can vary within the entire spraying range, enabling the coolant to evenly cover different areas of the slab, especially when the cooling requirements of the edge and the middle are different.

[0027] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3The second spray mechanism 5 includes a second support frame 51, a second arc groove 52 is provided on the second support frame 51, a second sliding block 53 is slidably connected in the second arc groove 52, a second spray pipe 54 is fixedly connected to the second sliding block 53, the second spray pipe 54 is fixedly connected to the middle spray pipe 4 through a second hose 55, and a second nozzle 56 is detachably connected below the second spray pipe 54. The operator adjusts the angle and position of the second spray pipe 54 by sliding the second sliding block 53 to meet the cooling requirements of the middle part of the ingot. After the adjustment is completed, the position of the second sliding block 53 is fixed to ensure that the second spray pipe 54 is maintained at the set angle , adjustment during operation. During the cooling process, the position and spraying angle of the second spray pipe 54 can be adjusted in real time according to the temperature of the ingot or production requirements to ensure continuous optimization of the cooling process and uniform cooling. Maintenance and replacement. Regularly clean or replace the second nozzle 56 to ensure the spraying effect and prevent blockage. Adjust the position of the second sliding block 53 for maintenance or replacement of other components to keep the system running normally. Flexible adjustment of the spraying range. By adjusting each second regulating valve 7, the amount of water on the spray pipe can vary within the entire spraying range, so that the coolant can evenly cover different areas of the ingot, especially when the cooling requirements of the edge and the middle are different.

[0028] In one embodiment, see Figure 1 , Figure 2 and Figure 3 The second spray pipes 54 are all provided with second regulating valves 7, through which the water flow of each second spray pipe 54 can be precisely adjusted to meet the cooling requirements of the middle part of the ingot and optimize the amount and range of water sprayed. Each second regulating valve 7 controls a spraying area. By adjusting the opening of the second regulating valve 7, the spraying range and water flow are changed, so that the coolant can cover different parts of the middle part of the ingot and improve the cooling effect. The second regulating valve 7 allows the water flow of the second spray pipe 54 to be adjusted in real time according to parameters such as the width and thickness of the ingot. Improve the cooling efficiency and avoid excessive or insufficient cooling.

[0029] In one embodiment, see Figure 1 , Figure 2 and Figure 3, a second mounting hole 511 is provided on the second support frame 51, a second limiting hole 531 is provided on the second sliding block 53, and a fastening bolt passing through the second mounting hole 511 and the second limiting hole 531 is provided on the second support frame 51. The operator loosens the fastening bolt to enable the second sliding block 53 to slide within the second arc-shaped groove 52. According to the cooling requirement, the second sliding block 53 is adjusted to a suitable position so that the second spray pipe 54 achieves the best spraying effect. After the adjustment is completed, the fastening bolt is tightened to fix the second sliding block 53 on the second support frame 51. Ensure that the second spray pipe 54 maintains a stable spraying angle and position during the cooling process. During the cooling process, if it is necessary to adjust the spraying angle or position, loosen the fastening bolt, slide the second sliding block 53 to a new position, and then tighten the fastening bolt again. When it is necessary to replace or clean the second spray pipe 54, loosen the fastening bolt, adjust the position of the second sliding block 53 for maintenance. After the adjustment, tighten the fastening bolt to ensure that the spraying system resumes normal working state.

[0030] In one embodiment, please refer to Figure 1 、 Figure 2 and Figure 3 , angle disks 8 are provided on the first support frame 31 and the second support frame 51. According to the cooling requirement of the continuous casting billet, the first spray pipe 34 and the second spray pipe 54 are adjusted to a specific angle. The angle scale is read using the angle disk 8 to ensure that the sprayed coolant covers the target area of the continuous casting billet. Adjust the spraying range. During the production process, if it is found that the cooling effect is not ideal, the operator can finely adjust the angle of the spray pipe through the angle disk 8 to optimize the spraying range of the coolant. Maintenance and adjustment: Regularly maintain the cleanliness and calibration of the angle disk 8 and the indicating needle 9 to ensure the accuracy of the angle adjustment and the consistency of the spraying effect.

[0031] In one embodiment, please refer to Figure 1 、 Figure 2 and Figure 3 , indicating needles 9 are provided on both the first spray pipe 34 and the second spray pipe 54. The indicating needle 9 points to the scale on the angle disk 8, intuitively showing the current angle of the first spray pipe 34 and the second spray pipe 54, enabling the operator to easily read and adjust the angle of the second spray pipe 54, improving the accuracy of adjustment. The indicating needle 9 provides immediate angle feedback, facilitating the operator to quickly adjust the angle according to the scale of the angle disk 8. By observing the position change of the indicating needle 9, the operator can understand the angle change of the spray pipe in real time and improve the adjustment efficiency.

[0032] The above content is only an example and explanation of the structure of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the described specific embodiments or use similar methods to replace them. As long as they do not deviate from the structure of the invention or exceed the scope defined by this claim book, they should fall within the protection scope of the present invention.

Claims

1. A secondary cooling spray width cutting control device for a bending section of a slab continuous casting machine, comprising a continuous casting machine body (1), characterized in that: Side spray pipes (2) are arranged on both sides of the arc-shaped sector segment of the continuous casting machine body (1), and a plurality of first spray mechanisms (3) are arranged on the side spray pipes (2). A middle spray pipe (4) is arranged in the middle of the arc-shaped sector segment of the continuous casting machine body (1), and a plurality of second spray mechanisms (5) are arranged on the middle spray pipe (4).

2. A slab continuous casting machine bending section secondary cooling spray width cutting control device according to claim 1, characterized in that: The first spray mechanism (3) comprises a first supporting frame (31), the first supporting frame (31) is provided with a first arc-shaped groove (32), a first sliding block (33) is slidably connected in the first arc-shaped groove (32), a first spray pipe (34) is fixedly connected to the first sliding block (33), the first spray pipe (34) is fixedly connected to the edge spray pipe (2) through a first hose (35), and a first nozzle (36) is detachably connected below the first spray pipe (34).

3. A slab continuous casting machine bending section secondary cooling spray width cutting control device according to claim 2, characterized in that: The first supporting frame (31) is provided with a first mounting hole (311), the first sliding block (33) is provided with a first limiting hole (331), and the first supporting frame (31) is provided with a fastening bolt passing through the first mounting hole (311) and the first limiting hole (331).

4. A slab continuous casting machine bending section secondary cooling spray width cutting control device according to claim 3, characterized in that: The first spray pipe (34) is provided with a first regulating valve (6).

5. The device for controlling the secondary cooling spray width cutting of the bending section of a slab continuous casting machine according to claim 2, characterized in that: The second spray mechanism (5) comprises a second supporting frame (51), the second supporting frame (51) is provided with a second arc-shaped groove (52), a second sliding block (53) is slidably connected in the second arc-shaped groove (52), a second spray pipe (54) is fixedly connected to the second sliding block (53), the second spray pipe (54) is fixedly connected to the middle spray pipe (4) through a second hose (55), and a second nozzle (56) is detachably connected below the second spray pipe (54).

6. A slab continuous casting machine bending section secondary cooling spray width cutting control device according to claim 5, characterized in that: The second spray pipe (54) is provided with a second regulating valve (7).

7. A slab continuous casting machine bending section secondary cooling spray width cutting control device according to claim 6, characterized in that: The second supporting frame (51) is provided with a second mounting hole (511), the second sliding block (53) is provided with a second limiting hole (531), and the second supporting frame (51) is provided with a fastening bolt passing through the second mounting hole (511) and the second limiting hole (531).

8. The device for controlling the secondary cooling spray width cutting of the bending section of a slab continuous casting machine according to claim 5, characterized in that: Angle plates (8) are provided on the first supporting frame (31) and the second supporting frame (51).

9. A slab continuous casting machine bending section secondary cooling spray width cutting control device according to claim 5, characterized in that: The first spray pipe (34) and the second spray pipe (54) are both provided with an indicator needle (9).

Images