Roll cooling device

Abstract

The utility model relates to a kind of roller cooling device, including two groups of cooling water pipes up and down, the cooling water pipe is parallel to work roll and support roll is set with rotating assembly in its one side end portion, and the other end is communicated with main water supply pipe by swivel joint;Cooling water pipe center height is located between the section of work roll and support roll and the central axis of its corresponding work roll;Multiple rows of cooling nozzles are provided on the outer periphery along the axis of cooling water pipe, the outermost row of cooling nozzles is support roll cooling nozzle, and its water jet axis intersects with support roll, and the rest several rows of cooling nozzles are work roll cooling nozzle, and its water jet axis intersects with work roll;The rotating assembly is set in the end of cooling water pipe and can drive its rotation adjustment support roll cooling nozzle and work roll cooling nozzle direction;The present application effectively improves the uniformity of roller cooling by setting rotatable cooling water pipe and multiple rows of nozzles, and has good cooling effect, ensures the good working condition of roller, and guarantees the quality of hot-rolled strip steel.

Description

Technical Field

[0001] This utility model relates to the technical field of steel rolling production equipment, specifically a roll cooling device. Background Technology

[0002] In hot-rolled steel plate production, the steel plate needs to undergo multiple rolling passes on the rolling production line. Prolonged contact between the rolls and the high-temperature steel plate can easily cause roll deformation or damage. The roll cooling device is a crucial component for extending roll life and ensuring the quality of steel plate rolling. Uneven roll cooling can cause roll deformation and even roll breakage. Deformation of the roll's thermal crown will affect the shape and straightness of the steel plate. Rapid and uniform cooling of the roll surface is extremely important. The rolls of a four-high rolling mill include work rolls and support rolls. The work rolls are in direct contact with the high-temperature steel strip, while the support rolls support the work rolls to ensure uniform rolling of the steel plate. Current roll cooling primarily focuses on cooling the work rolls. If the heat transferred to the support rolls is not cooled promptly, it can cause support roll deformation, resulting in uneven support force and affecting the quality of steel plate rolling.

[0003] Chinese patent CN218424793U discloses a roll cooling device for a hot-rolled strip steel production line, including a horizontally arranged main water pipe with two rows of cooling nozzles along the horizontal direction. The upper row of cooling nozzles is aimed at the support roll, and the lower row of cooling nozzles is aimed at the work roll, solving the cooling problem of the support roll. However, the improvement of the above patent still has the following defects: the temperature of the work roll and the support roll is different, and the upper and lower rows of cooling nozzles spray water on the work roll and the support roll simultaneously, resulting in different cooling rates and uneven cooling of the roll, and complex and repeated heat transfer; the spray angle between the cooling water nozzles and the roll surface is fixed, and it is impossible to adjust the part of the cooling water sprayed onto the roll surface according to the temperature, which limits the cooling effect of the roll. Therefore, a roll cooling device with uniform cooling and adjustable spray angle is needed. Utility Model Content

[0004] The purpose of this invention is to provide a roll cooling device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A roll cooling device includes two sets of cooling water pipes, one above the other, arranged parallel to the work roll and the other to the support roll. A rotating assembly is provided at one end of each cooling water pipe. The center height of the cooling water pipe is located between the corresponding center axis of the work roll and the tangent plane of the work roll and the support roll. Multiple rows of cooling nozzles are arranged on the outer periphery of the cooling water pipe along its axis. The outermost row of cooling nozzles is the support roll cooling nozzle, and the spray axis of the support roll cooling nozzle intersects with the support roll. The remaining rows of cooling nozzles are the work roll cooling nozzles, and the spray axis of the work roll cooling nozzle intersects with the work roll. The rotating assembly can drive the cooling water pipe to rotate and adjust the direction of the support roll cooling nozzles and the work roll cooling nozzles.

[0006] In the aforementioned roll cooling device, the spacing between the cooling nozzles of the support rolls is greater than the spacing between the cooling nozzles of the work rolls.

[0007] In the above-mentioned roll cooling device, the working roll cooling nozzles are arranged in two rows, one above the other. The spacing between the two rows of working roll cooling nozzles along the axial direction is the same, and the included angle between the two rows of working roll cooling nozzles is smaller than the included angle between the working roll cooling nozzles and the support roll cooling nozzles.

[0008] In the aforementioned roll cooling device, the angle between the cooling nozzle of the support roll and the horizontal line is between 30° and 50°; the angle between the cooling nozzle of the work roll and the horizontal line is between 0° and 50°.

[0009] The aforementioned roll cooling device includes a rotating assembly comprising a fixed base, a hydraulic cylinder, and a connecting bracket. The fixed base is fixed to the roll seat by bolts, the connecting bracket is fixedly connected to the end of the cooling water pipe, and the hydraulic cylinder is hinged between the fixed base and the connecting bracket to drive the cooling water pipe to rotate.

[0010] In the aforementioned roll cooling device, the connecting bracket is provided with a rotating shaft concentric with the cooling water pipe, and the end of the cooling water pipe is supported on the fixed base via the rotating shaft.

[0011] In the aforementioned roll cooling device, a limit block is provided on the connecting bracket, and the limit block is fixed by bolts to limit the rotation angle of the cooling water pipe.

[0012] In the aforementioned roll cooling device, the other end of the cooling water pipe is connected to the main water supply pipe via a rotary joint, and a pipe flow meter is also installed between the rotary joint and the main water supply pipe.

[0013] In the aforementioned roll cooling device, both the support roll cooling nozzle and the work roll cooling nozzle are selected as nozzles with flat fan-shaped outlets.

[0014] The aforementioned roll cooling device has a drain valve at the end of the cooling water pipe.

[0015] The beneficial effects of adopting the above technical solution are: This utility model provides a roll cooling device, comprising upper and lower sets of cooling water pipes to cool the upper and lower rolls respectively; the cooling water pipes are arranged parallel to the work roll and the support roll, and a rotating component is provided at one end of each pipe to adjust the spray angle of the cooling water pipe onto the roll surface; the cooling water pipes are arranged between the central axis of the work roll and the tangent plane of the work roll and the support roll, and are provided with one row of support roll cooling nozzles and two rows of work roll cooling nozzles, which can enable the work roll and the support roll to cool down synchronously and uniformly; the rotating component at the end of the cooling water pipe can adjust the spray position of the cooling water pipe on the roll surface according to the temperature, and the uniform cooling can meet various rolling conditions. Attached Figure Description

[0016] Figure 1 This is a schematic diagram showing the position and structure of the cooling water pipe and the rolling mill of this utility model; Figure 2 This is a schematic diagram showing the position and structure of the cooling water pipe, working roller, and support roller of this utility model; Figure 3 This is a schematic diagram of the cooling water pipe of this utility model; Figure 4 This is a three-dimensional structural diagram of the cooling water pipe of this utility model.

[0017] In the picture: 1. Cooling water pipe; 1-1. Support roller cooling nozzle; 1-2. Working roller cooling nozzle; 2. Working roller; 3. Support roller; 4. Rotating assembly; 4-1. Fixed seat; 4-2. Hydraulic cylinder; 4-3. Connecting bracket; 4-3-1. Rotating shaft; 4-3-2. Limiting block; 5. Rotary joint; 6. Main water supply pipe; 7. Pipe flow meter; 8. Drain valve. Detailed Implementation

[0018] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be clearly and completely described below in conjunction with specific embodiments.

[0019] like Figures 1 to 4The roll cooling device shown includes two sets of cooling water pipes 1, one above the other. The cooling water pipes 1 are arranged parallel to the work roll 2 and the support roll 3. A rotating component 4 is provided at one end of the cooling water pipe 1. The center height of the cooling water pipe 1 is located between the central axis of the corresponding work roll 2 and the tangent of the work roll 2 and the support roll 3, so that the cooling nozzles can spray cooling water onto the work roll 2 and the support roll 3 simultaneously. Multiple rows of cooling nozzles are arranged on the outer periphery of the cooling water pipe 1 along its axis. The outermost row of cooling nozzles is the support roll cooling nozzle 1-1. The spray axis of the support roll cooling nozzle 1-1 intersects with the support roll 3 and is used to spray cooling water onto the support roll 3. The remaining rows of cooling nozzles are the work roll cooling nozzles 1-2. The spray axis of the work roll cooling nozzles 1-2 intersects with the work roll 2 and is used to spray cooling water onto the work roll 2. The rotating component 4 is located at the end of the cooling water pipe 1 and can be driven to rotate to adjust the direction of the support roll cooling nozzle 1-1 and the work roll cooling nozzle 1-2, change the position and angle of the cooling water spray on the roll surface, and adjust the cooling water coverage according to the rolling conditions of the production.

[0020] like Figures 2 to 4 As shown, given that the temperature of the work roll 2 is higher than that of the support roll 3, in this embodiment, the spacing between the support roll cooling nozzles 1-1 is greater than the spacing between the work roll cooling nozzles 1-2, making the water distribution more reasonable. Furthermore, the work roll cooling nozzles 1-2 are arranged in two rows, one above the other, with the same spacing along the axial direction. The angle between the two rows of work roll cooling nozzles 1-2 is smaller than the angle between the work roll cooling nozzles 1-2 and the support roll cooling nozzles 1-1. The work roll cooling nozzles 1-2 preferentially spray water towards the rolling surface of the work roll 2, rapidly cooling the high-temperature roll surface and preventing roll deformation. This also reduces the heat transferred from the work roll 2 to the support roll 3. In this embodiment, the angle between the support roll cooling nozzles 1-1 and the horizontal line is set between 30° and 50°, ensuring that the cooling water sprayed from the support roll cooling nozzles 1-1 falls evenly onto the roll surface close to the high-temperature strip steel, providing timely and uniform cooling to the work roll 2. The working roll cooling nozzles 1-2 are inclined at an angle between 0° and 50° to the horizontal line, so that the cooling water at the spray point is sprayed onto the support roll 3 in front of the tangent point between the working roll 2 and the support roll 3, and the water flowing off the support roll 3 falls back onto the working roll 2, cooling it from above. Furthermore, both the support roll cooling nozzles 1-1 and the working roll cooling nozzles 1-2 are selected with flat fan-shaped outlets, so that the cooling water flow spreads along the roll axis and falls onto the roll surface. The cooling nozzles provided in this application can ensure that the roll surface detached from the working roll 2 and subjected to high-temperature strip steel is completely covered with cooling water, resulting in good cooling effect.

[0021] The cooling effect of the working roller 2 is affected by the water volume and nozzle density, as well as the distance, angle, and deflection angle between the cooling water nozzle and the roller surface. This embodiment further includes a rotating assembly 4 for adjusting the spray angle of the cooling nozzle, such as... Figure 1 , Figure 2 and Figure 4 As shown, the rotating assembly 4 includes a fixed base 4-1, a hydraulic cylinder 4-2, and a connecting bracket 4-3. The fixed base 4-1 is fixed to the roller seat by bolts. The connecting bracket 4-3 is fixedly connected to the end of the cooling water pipe 1. The hydraulic cylinder 4-2 is hinged between the fixed base 4-1 and the connecting bracket 4-3, which can push the cooling water pipe 1 to rotate, adjusting the spray angle of the cooling nozzles of the cooling water pipe 1 and changing the position where the cooling water falls on the roller. The connecting bracket 4-3 is provided with a rotating shaft 4-3-1 concentric with the cooling water pipe 1. The end of the cooling water pipe 1 is supported on the fixed base 4-1 through the rotating shaft 4-3-1. The cooling water pipe 1 can rotate around the rotating shaft 4-3-1 to adjust the angle of the cooling nozzles. The connecting bracket 4-3 is also provided with a limit block 4-3-2, which is fixed by bolts to limit the rotation angle of the cooling water pipe 1 and prevent the rotation angle of the connecting bracket 4-3 from exceeding the preset range.

[0022] The other end of the cooling water pipe 1 is connected to the main water supply pipe 6 via a rotary joint 5, which allows the cooling water pipe 1 to rotate flexibly and adjust the angle of the cooling water nozzle. At the same time, a pipe flow meter 7 is also installed between the rotary joint 5 and the main water supply pipe, which can observe and provide feedback on the water flow of the cooling water pipe 1 in a timely manner. If the water flow is abnormal, the cooling water pipe 1 can be drained and cleaned through the drain valve 8 installed at the tail end of the cooling water pipe 1 to ensure smooth water flow and effective cooling of the roll.

[0023] This article uses specific embodiments to illustrate the principles and implementation methods of this utility model in detail. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. Those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A roll cooling device, characterized in that: The device includes two sets of cooling water pipes (1), which are arranged parallel to the working roller (2) and the support roller (3). A rotating component (4) is provided at one end of the cooling water pipe (1). The center height of the cooling water pipe (1) is located between the central axis of the corresponding working roller (2) and the tangent of the working roller (2) and the support roller (3). Multiple rows of cooling nozzles are provided on the outer periphery of the cooling water pipe (1) along its axis. The outermost row of cooling nozzles is the support roller cooling nozzle (1-1), and the spray axis of the support roller cooling nozzle (1-1) intersects with the support roller (3). The remaining rows of cooling nozzles are the working roller cooling nozzles (1-2), and the spray axis of the working roller cooling nozzles (1-2) intersects with the working roller (2). The rotating component (4) can drive the cooling water pipe (1) to rotate and adjust the direction of the support roller cooling nozzle (1-1) and the working roller cooling nozzle (1-2).

2. The roll cooling device according to claim 1, characterized in that: The spacing between the cooling nozzles (1-1) of the support roller is greater than the spacing between the cooling nozzles (1-2) of the work roller.

3. The roll cooling device according to claim 2, characterized in that: The working roller cooling nozzles (1-2) are arranged in two rows, one above the other. The spacing between the two rows of working roller cooling nozzles (1-2) along the axial direction is the same, and the included angle between the two rows of working roller cooling nozzles (1-2) is smaller than the included angle between the working roller cooling nozzles (1-2) and the support roller cooling nozzles (1-1).

4. A roll cooling device according to claim 3, characterized in that: The angle between the support roller cooling nozzle (1-1) and the horizontal line is between 30° and 50°; the angle between the work roller cooling nozzle (1-2) and the horizontal line is between 0° and 50°.

5. A roll cooling device according to claim 2, characterized in that: The rotating assembly (4) includes a fixed base (4-1), a hydraulic cylinder (4-2), and a connecting bracket (4-3). The fixed base (4-1) is fixed to the roller seat by bolts. The connecting bracket (4-3) is fixedly connected to the end of the cooling water pipe (1). The hydraulic cylinder (4-2) is hinged between the fixed base (4-1) and the connecting bracket (4-3) to drive the cooling water pipe (1) to rotate.

6. A roll cooling device according to claim 5, characterized in that: The connecting bracket (4-3) is provided with a rotating shaft (4-3-1) concentric with the cooling water pipe (1), and the end of the cooling water pipe (1) is supported on the fixed base (4-1) through the rotating shaft (4-3-1).

7. A roll cooling device according to claim 6, characterized in that: The connecting bracket (4-3) is provided with a limiting block (4-3-2), which is fixed by bolts to limit the rotation angle of the cooling water pipe (1).

8. A roll cooling device according to claim 5, characterized in that: The other end of the cooling water pipe (1) is connected to the main water supply pipe (6) through a rotary joint (5), and a pipe flow meter (7) is also provided between the rotary joint (5) and the main water supply pipe.

9. A roll cooling device according to claim 2, characterized in that: Both the support roller cooling nozzle (1-1) and the working roller cooling nozzle (1-2) are selected as nozzles with flat fan-shaped outlets.

10. A roll cooling device according to claim 2, characterized in that: A drain valve (8) is provided at the end of the cooling water pipe (1).

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