Hot rolling stand inter-stand strip cooling device

Abstract

This utility model relates to the technical field of hot-rolled strip steel production equipment, and in particular to a strip steel cooling device between hot-rolling mill stands. It includes a mill stand and a water spray assembly and an air blowing assembly located on one side of the mill stand. Multiple water spray assemblies and air blowing assemblies are provided, spaced apart and staggered. Each air blowing assembly includes an upper air blowing pipe and a lower air blowing pipe. A second support column is provided on one side of the strip steel. One end of each of the upper and lower air blowing pipes is connected to the second support column. The upper air blowing pipe is located above the strip steel, and the lower air blowing pipe is located below the strip steel. Compressed air nozzles for blowing air onto the strip steel are fixed on both the upper and lower air blowing pipes. This utility model has the technical effect of improving the strip steel cooling efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of hot-rolled strip steel production equipment, and in particular to a strip steel cooling device between hot rolling mill stands. Background Technology

[0002] Currently, when hot-rolling thin strip steel, cooling water is needed to lower the strip temperature. Traditional cooling methods mainly rely on water jet cooling, but this has several problems, such as limited cooling efficiency and difficulty in ensuring cooling uniformity. When water is sprayed onto the surface of the high-temperature strip steel, a vapor film forms on the surface. This vapor film hinders the rapid transfer of heat, thus reducing cooling efficiency. Therefore, a more efficient cooling device is needed to overcome the shortcomings of existing technologies. Utility Model Content

[0003] In order to solve the problems existing in the prior art, the present invention provides a strip cooling device between hot rolling mill stands.

[0004] This utility model provides a strip cooling device between hot rolling mill stands, which adopts the following technical solution:

[0005] A strip cooling device between hot rolling mill stands includes a mill stand and a water spraying assembly and an air blowing assembly located on one side of the mill stand. Multiple water spraying assemblies and air blowing assemblies are provided, and the water spraying assemblies and air blowing assemblies are spaced apart and staggered. The air blowing assembly includes an upper air blowing pipe and a lower air blowing pipe. A second support column is provided on one side of the strip. One end of the upper air blowing pipe and one end of the lower air blowing pipe are both connected to the second support column. The upper air blowing pipe is located above the strip, and the lower air blowing pipe is located below the strip. Compressed air nozzles for blowing air onto the strip are fixed on both the upper air blowing pipe and the lower air blowing pipe.

[0006] Optionally, the water spray assembly includes an upper water spray pipe and a lower water spray pipe. A first support column is provided on one side of the strip, and one end of the upper water spray pipe and one end of the lower water spray pipe are both connected to the first support column. The upper water spray pipe is located above the strip, and the lower water spray pipe is located below the strip. Multiple water spray nozzles for spraying water onto the strip are fixed on both the upper and lower water spray pipes.

[0007] Optionally, a first sliding groove is provided on the first support column, and a first upper sliding block and a first lower sliding block are slidably disposed in the first sliding groove. The upper water spray pipe is fixed to the first upper sliding block, and the lower water spray pipe is fixed to the first lower sliding block. A first driving component is provided on the first support column to drive the first upper sliding block and the first lower sliding block to move closer to or further away from each other.

[0008] Optionally, the first drive assembly includes a threaded rod and a drive motor. The threaded rod has opposite thread directions from the middle to both ends, and is threadedly connected to both the first upper slider and the first lower slider. The bottom of the threaded rod has a groove bottom wall that is rotatably connected to the groove, and the top of the threaded rod passes through the bottom of the first support column. The drive motor is fixed to the top of the first support column, and the output shaft of the drive motor is fixed to the threaded rod.

[0009] Optionally, a second sliding groove is provided on the second support column, in which a second upper slider and a second lower slider are slidably disposed. The upper air pipe is fixed to the second upper slider, and the lower air pipe is fixed to the second lower slider. A second driving assembly is provided on the second support column to drive the second upper slider and the second lower slider to move closer or further apart.

[0010] Compared with the prior art, the present invention has the following technical effects:

[0011] This invention sprays water onto the strip steel through a spray nozzle, forming a stable vapor film on the surface of the high-temperature strip steel 7. Then, the impact force of compressed air is used to break the vapor film, allowing the cooling water to directly contact the surface of the strip steel, thereby achieving efficient heat transfer and improving the cooling efficiency of the strip steel. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the water spray component and the air blowing component in this utility model;

[0014] Figure 3 This is a top view of the utility model.

[0015] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Water spray assembly; 21. Upper water spray pipe; 211. Water spray nozzle; 22. Lower water spray pipe; 23. Conveyor pipe; 3. First support column; 31. First slide groove; 32. First upper slider; 33. First lower slider; 4. Air blowing assembly; 41. Upper air blowing pipe; 411. Compressed air nozzle; 42. Lower air blowing pipe; 43. Air delivery pipe; 5. Second support column; 51. Second slide groove; 52. Second upper slider; 53. Second lower slider; 6. First drive assembly; 61. Threaded rod; 62. Drive motor; 7. Strip steel. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1 - Appendix Figure 3 The present invention will be described in further detail below.

[0017] Embodiment 1 of this utility model

[0018] Reference Figure 1 and Figure 2This utility model discloses a strip cooling device for a hot rolling mill stand, including a stand 1, a water spray assembly 2, and an air blowing assembly 4, with multiple water spray assemblies 2 and air blowing assemblies 4 located between two stands 1. The water spray assemblies 2 and air blowing assemblies 4 are spaced apart and staggered.

[0019] The water spray assembly 2 includes an upper water spray pipe 21 and a lower water spray pipe 22. A first support column 3 is provided on one side of the strip 7. One end of the upper water spray pipe 21 and one end of the lower water spray pipe 22 are both fixed to the first support column 3. The upper water spray pipe 21 is located above the strip 7, and the lower water spray pipe 22 is located below the strip 7. The length directions of both the upper water spray pipe 21 and the lower water spray pipe 22 are perpendicular to the conveying direction of the strip 7. Multiple water nozzles 211 are fixed on both the upper water spray pipe 21 and the lower water spray pipe 22, and the outlets of the water nozzles 211 face the strip 7.

[0020] The upper spray pipe 21 and the lower spray pipe 22 are fixed at the ends away from the first support column 3 and connected to a delivery pipe 23. The delivery pipe 23 is a flexible hose, and a water tank is connected to the end of the delivery pipe 23. A water pump is installed on the delivery pipe 23. The water pump draws cooling water from the water tank, and the cooling water enters the upper spray pipe 21 and the lower spray pipe 22 through the delivery pipe 23. Finally, it is sprayed out from the spray nozzle 211 to cool the strip steel 7.

[0021] The air blowing assembly 4 includes an upper air blowing pipe 41 and a lower air blowing pipe 42. A second support column 5 is provided on one side of the strip 7. One end of the upper air blowing pipe 41 and one end of the lower air blowing pipe 42 are fixed to the second support column 55. The upper air blowing pipe 41 is located above the strip 7, and the lower air blowing pipe 42 is located below the strip 7. Compressed air nozzles 411 are fixed on both the upper air blowing pipe 41 and the lower air blowing pipe 42, and the compressed air nozzles 411 blow air onto the strip 7. The ends of the upper air blowing pipe 41 and the lower air blowing pipe 42 away from the second support column 55 are both connected to air supply pipes 43, and the ends of the air supply pipes 43 are connected to air pumps.

[0022] The cooling device of this utility model has three working modes: 1. Cooling with only cooling water, suitable for general cooling needs; 2. Cooling with only compressed air, suitable for slight cooling or special environments; 3. Cooling with a combination of water and compressed air, suitable for high temperature rapid cooling needs.

[0023] When the strip steel 7 is cooled, the cooling water sprayed by the nozzle 211 vaporizes instantly upon contact with the strip steel 7 due to the significant temperature difference. Under certain conditions, this vapor may form a relatively stable vapor film on the surface of the strip steel 7. This phenomenon is possible in thermodynamics and fluid mechanics, similar to the Leidenfrost effect, where a vapor film forms between a liquid and a surface much higher than its boiling point, suspending the liquid in the vapor layer and slowing down heat transfer. This invention controls the water spray parameters (such as flow rate and pressure) to form a stable vapor film on the surface of the high-temperature strip steel 7, and then uses the impact force of compressed air to break the vapor film, allowing the cooling water to directly contact the surface of the strip steel 7, thereby achieving efficient heat transfer.

[0024] Embodiment 2 of this utility model

[0025] Reference Figure 3 The difference from Embodiment 1 lies in the connection method between the first support column 3 and the upper spray pipe 21 and the lower spray pipe 22. A first sliding groove 31 is provided on the first support column 3, within which a first upper slider 32 and a first lower slider 33 are slidably disposed. The upper spray pipe 21 is fixed to the first upper slider 32, and the lower spray pipe 22 is fixed to the first lower slider 33. A first driving assembly 6 is provided on the first support column 3 to drive the first upper slider 32 and the first lower slider 33 to move closer or further apart. The first driving assembly 6 includes a threaded rod 61 and a drive motor 62. The threaded rod 61 has opposite thread directions from the middle to both ends, and is threadedly connected to both the first upper slider 32 and the first lower slider 33. The bottom of the threaded rod 61 is rotatably connected to the bottom wall of the first sliding groove 31, and the top of the threaded rod 61 penetrates the bottom of the first support column 3. The drive motor 62 is fixed to the top of the first support column 3, and the output shaft of the drive motor 62 is fixed to the threaded rod 61.

[0026] The drive motor 62 drives the threaded rod 61 to rotate. The rotation of the threaded rod 61 causes the first upper slider 32 and the first lower slider 33 to move closer or further apart, thereby causing the upper water spray pipe 21 or the lower water spray pipe 22 to move closer or further away from the strip steel 7, thereby adjusting the distance between the water spray nozzle 211 and the strip steel 7.

[0027] A second sliding groove 51 is provided on the second support column 55, in which a second upper slider 52 and a second lower slider 53 are slidably disposed. The upper air pipe 41 is fixed to the second upper slider 52, and the lower air pipe 42 is fixed to the second lower slider 53. A second driving assembly is provided on the second support column 55 to drive the second upper slider 52 and the second lower slider 53 to move closer or further apart. The structure of the second driving assembly is the same as that of the first driving assembly 6. Adjusting the distance between the upper air pipe 41 and the lower air pipe 42 and the strip 7 can effectively allow the impact force of the compressed air to break the vapor film, thereby improving the cooling efficiency of the strip 7.

[0028] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A strip cooling device between hot rolling mill stands, characterized in that: It includes a frame (1) and a water spray assembly (2) and an air blowing assembly (4) located on one side of the frame (1). Multiple water spray assemblies (2) and air blowing assemblies (4) are provided. The water spray assemblies (2) and air blowing assemblies (4) are spaced apart and staggered. The air blowing assembly (4) includes an upper air blowing pipe (41) and a lower air blowing pipe (42). A second support column (5) is provided on one side of the strip (7). One end of the upper air blowing pipe (41) and one end of the lower air blowing pipe (42) are connected to the second support column (5). The upper air blowing pipe (41) is located above the strip (7), and the lower air blowing pipe (42) is located below the strip (7). Compressed air nozzles (411) for blowing air onto the strip (7) are fixed on both the upper air blowing pipe (41) and the lower air blowing pipe (42).

2. The strip cooling device between hot rolling mill stands according to claim 1, characterized in that: The water spray assembly (2) includes an upper water spray pipe (21) and a lower water spray pipe (22). A first support column (3) is provided on one side of the strip (7). One end of the upper water spray pipe (21) and one end of the lower water spray pipe (22) are connected to the first support column (3). The upper water spray pipe (21) is located above the strip (7), and the lower water spray pipe (22) is located below the strip (7). Multiple water spray nozzles (211) for spraying water onto the strip (7) are fixed on both the upper water spray pipe (21) and the lower water spray pipe (22).

3. The strip cooling device between hot rolling mill stands according to claim 2, characterized in that: The first support column (3) is provided with a first sliding groove (31), and a first upper sliding block (32) and a first lower sliding block (33) are slidably arranged in the first sliding groove (31). The upper water spray pipe (21) is fixed to the first upper sliding block (32), and the lower water spray pipe (22) is fixed to the first lower sliding block (33). The first support column (3) is provided with a first driving component (6) that drives the first upper sliding block (32) and the first lower sliding block (33) to move closer to each other or further away from each other.

4. The strip cooling device between hot rolling mill stands according to claim 2, characterized in that: The first drive assembly (6) includes a threaded rod (61) and a drive motor (62). The threaded rod (61) has opposite thread directions from the middle to both ends. The threaded rod (61) is threadedly connected to the first upper slider (32) and the first lower slider (33). The bottom of the threaded rod (61) is rotatably connected to the bottom wall of the first groove (31). The top of the threaded rod (61) passes through the bottom of the first support column (3). The drive motor (62) is fixed to the top of the first support column (3). The output shaft of the drive motor (62) is fixed to the threaded rod (61).

5. The strip cooling device between hot rolling mill stands according to claim 2 or 3, characterized in that: The second support column (5) is provided with a second slide groove (51), in which a second upper slide block (52) and a second lower slide block (53) are slidably arranged. The upper air pipe (41) is fixed to the second upper slide block (52), and the lower air pipe (42) is fixed to the second lower slide block (53). The second support column (5) is provided with a second drive assembly that drives the second upper slide block (52) and the second lower slide block (53) to move closer or further away from each other.

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