Cooling device and cooling method for upper roller at inlet of finishing mill

Abstract

The embodiment of the invention provides a cooling device and method for an upper roller at an inlet of a finishing mill, and relates to the technical field of metallurgical equipment. The cooling device for the roller on the upper portion of the inlet of the finishing mill comprises a working roller, a supporting roller and a cooling mechanism, the supporting roller is arranged above the working roller, the cooling mechanism is provided with a first water outlet and a second water outlet, the first water outlet makes contact with the working roller, the second water outlet and the supporting roller are arranged in a spaced mode, and the supporting roller is arranged above the working roller. The first water outlet is used for spraying water towards the surface of the working roller so as to cool and clean the surface of the working roller, and the second water outlet is used for spraying water towards the surface of the supporting roller so as to cool and clean the surface of the supporting roller. In the using process, the first water outlet and the second water outlet of the cooling mechanism can clean and cool the working roller and the supporting roller correspondingly, and the cooling efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical equipment, and in particular to a cooling device and a cooling method for an upper roller at an inlet of a finishing mill. Background Art

[0002] The finishing rolling low-pressure water system is a process element that must be paid attention to at all times in hot rolling. Its pressure, flow rate, nozzle layout and angle, water quality, etc. are directly related to the cooling efficiency of the rolls, the temperature drop of the strip section, the state of the roll oxide film, etc., which are closely related to product quality and directly affect the life of spare parts such as rolls. The upper and lower support rolls and working rolls of the finishing rolling unit use a water spray cooling device to impact the water flow on the roll surface, cool the roll surface, and achieve uniform generation of the roll oxide film.

[0003] Some hot rolling finishing mills in the prior art have the technical problem of low roll cooling efficiency. Summary of the invention

[0004] The invention provides a cooling device and a cooling method for an upper roller at an inlet of a finishing mill, which can improve the cooling efficiency.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] An embodiment of the present invention provides a finishing mill entrance upper roll cooling device, comprising:

[0007] Working roll;

[0008] A support roller, wherein the support roller is arranged above the working roller;

[0009] A cooling mechanism, wherein the cooling mechanism comprises a first water outlet and a second water outlet, wherein the first water outlet is in contact with the working roll, and the second water outlet is spaced apart from the support roll, wherein the first water outlet is used for spraying water toward the surface of the working roll to cool and clean the surface of the working roll, and the second water outlet is used for spraying water toward the surface of the support roll to cool and clean the surface of the support roll.

[0010] Optionally, the cooling mechanism includes a frame, a working roll cooling member and a supporting roll cooling member, the working roll cooling member and the supporting roll cooling member are both installed on the frame, the first water outlet is arranged on the working roll cooling member, and the second water outlet is arranged on the supporting roll cooling member.

[0011] Optionally, the working roll cooling member includes a first pipe and a first nozzle which are connected to each other, a water outlet of the first nozzle is a first water outlet, and the first water outlet is tangent to the working roll.

[0012] Optionally, there are multiple first nozzles, all of which are connected to the first pipeline, and the multiple first nozzles are symmetrically distributed along the rolling center line.

[0013] Optionally, the support roller cooling member comprises a second pipe and a second nozzle which are connected to each other, the second nozzle is arranged toward the support roller, the second nozzle is arranged above the first nozzle, and the water outlet of the second nozzle is a second water outlet.

[0014] Optionally, there are multiple second nozzles, all of which are connected to the second pipe, and the multiple second nozzles are arranged in a straight line.

[0015] Optionally, the cooling mechanism further includes a steel plate cooling member, which is mounted on the frame, and a third water outlet of the steel plate cooling member sprays water toward the steel plate to cool and clean the surface of the steel plate.

[0016] Optionally, the upper rolling mill entrance upper roller cooling device also includes a power part, a steering block and a scraper, the scraper is installed at the bottom of the frame, the steering block is connected to the frame, and the power part is connected to the frame to drive the frame to rotate around the steering block until the scraper and the surface of the working roller are tangent.

[0017] Optionally, the upper roller cooling device at the entrance of the finishing mill further includes a memorial arch, and the working rolls, the support rolls and the cooling mechanism are all installed on the memorial arch.

[0018] The embodiment of the present invention further provides a method for cooling the upper roller at the entrance of a finishing mill, wherein the upper roller cooling device at the entrance of the finishing mill is used for cooling. The cooling method comprises:

[0019] The power member drives the frame to rotate around the steering block until the scraper and the surface of the working roller are tangent;

[0020] The water source is turned on, and the water enters the cooling mechanism and flows out from the first water outlet, the second water outlet and the third water outlet respectively, so as to clean and cool the surfaces of the working roll, the support roll and the steel plate respectively.

[0021] The beneficial effects of a cooling device and a cooling method for the upper roller at the entrance of a finishing mill according to an embodiment of the present invention include, for example:

[0022] The upper roller cooling device at the entrance of the finishing mill includes a working roller, a support roller and a cooling mechanism, wherein the support roller is arranged above the working roller, and the cooling mechanism has a first water outlet and a second water outlet, wherein the first water outlet contacts the working roller, and the second water outlet is spaced apart from the support roller, and the first water outlet is used to spray water toward the surface of the working roller to cool and clean the surface of the working roller, and the second water outlet is used to spray water toward the surface of the support roller to cool and clean the surface of the support roller. When in use, the first water outlet of the cooling mechanism contacts the working roller, and the first water outlet sprays water toward the surface of the working roller to cool and clean the surface of the working roller, and the second water outlet is spaced apart from the support roller, and the second water outlet is used to spray water toward the surface of the support roller to cool and clean the surface of the support roller. The first water outlet and the second water outlet of the cooling mechanism can clean and cool the working roller and the support roller respectively, thereby improving the cooling efficiency.

[0023] The cooling method of the upper roller at the entrance of the finishing mill adopts the cooling device of the upper roller at the entrance of the finishing mill for cooling, and the cooling method includes the following steps: the power member drives the frame to rotate around the turning block until the scraper and the surface of the working roller are tangent; the water source is turned on, and the water flows out from the first water outlet, the second water outlet and the third water outlet respectively after entering the cooling mechanism, so as to clean and cool the surface of the working roller, the support roller and the steel plate respectively. When in use, the first water outlet of the cooling mechanism contacts the working roller, and the first water outlet sprays water toward the surface of the working roller to cool and clean the surface of the working roller, and the second water outlet is spaced apart from the support roller, and the second water outlet is used to spray water toward the surface of the support roller to cool and clean the surface of the support roller. The first water outlet and the second water outlet of the cooling mechanism can clean and cool the working roller and the support roller respectively, thereby improving the cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic structural diagram of a first-viewing angle of the cooling device for the upper roll at the entrance of a finishing mill provided in this embodiment;

[0026] Figure 2 A schematic structural diagram of the second viewing angle of the cooling device for the upper roll at the entrance of the finishing mill provided in this embodiment;

[0027] Figure 3This is a schematic structural diagram of the third viewing angle of the cooling device for the upper roll at the inlet of the finishing mill provided in this embodiment.

[0028] Icons: 10-working roll; 20-support roll; 30-cooling mechanism; 31-frame; 32-working roll cooling member; 321-first nozzle; 33-support roll cooling member; 331-second nozzle; 34-steel plate cooling member; 40-power member; 50-steering block; 60-scraper; 70-arch; 80-cover plate. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0034] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0035] The finishing rolling low-pressure water system is a process element that must be paid attention to at all times in hot rolling. Its pressure, flow rate, nozzle layout and angle, water quality, etc. are directly related to the cooling efficiency of the rolls, the temperature drop of the strip section, the state of the roll oxide film, etc., which are closely related to product quality and directly affect the life of spare parts such as rolls. The upper and lower support rolls and working rolls of the finishing rolling unit use a water spray cooling device to impact the water flow on the roll surface, cool the roll surface, and achieve uniform generation of the roll oxide film.

[0036] Some hot rolling finishing mills in the related art have the technical problem of low roll cooling efficiency.

[0037] Please refer to Figure 1-Figure 3 This embodiment provides a cooling device for the upper roller at the entrance of a finishing mill, which can effectively improve the technical problems mentioned above and improve the cooling efficiency.

[0038] The upper roll cooling device at the entrance of the finishing mill includes a working roll 10, a support roll 20 and a cooling mechanism 30. The support roll 20 is arranged above the working roll 10. The cooling mechanism 30 has a first water outlet and a second water outlet. The first water outlet is in contact with the working roll 10, and the second water outlet is spaced apart from the support roll 20. The first water outlet is used to spray water toward the surface of the working roll 10 to cool and clean the surface of the working roll 10, and the second water outlet is used to spray water toward the surface of the support roll 20 to cool and clean the surface of the support roll 20.

[0039] In this embodiment, the cooling mechanism 30 includes a frame 31, a working roller cooling member 32 and a supporting roller cooling member 33. The working roller cooling member 32 and the supporting roller cooling member 33 are both installed on the frame 31, a first water outlet is arranged on the working roller cooling member 32, and a second water outlet is arranged on the supporting roller cooling member 33.

[0040] Specifically, the cooling mechanism 30 provided in this embodiment includes a working roll cooling member 32 and a supporting roll cooling member 33. The first nozzle 321 of the working roll cooling member 32 is arranged toward the working roll 10, and water is sprayed on the surface of the working roll 10 to clean and cool it. The second nozzle 331 of the supporting roll cooling member 33 is arranged toward the supporting roll 20, and water is sprayed on the surface of the supporting roll 20 to clean and cool it. The working roll cooling member 32 and the supporting roll cooling member 33 can clean and cool the surfaces of the working roll 10 and the supporting roll 20, respectively, thereby improving the cooling efficiency.

[0041] Specifically, the cooling device for the upper rolls at the entrance of the finishing mill further includes a memorial arch 70 , and the working rolls 10 , the backup rolls 20 and the cooling mechanism 30 are all installed on the memorial arch 70 .

[0042] It should be noted that the working roll cooling member 32 includes a first pipe and a first nozzle 321 that are connected to each other. The water outlet of the first nozzle 321 is a first water outlet, and the first water outlet is tangent to the working roll 10. The first pipe is connected to an external water source, and the water source flows into the first nozzle 321 through the first pipe and is sprayed onto the surface of the working roll 10 from the first water outlet of the first nozzle 321.

[0043] In this embodiment, there are multiple first nozzles 321, all of which are connected to the first pipe, and are symmetrically distributed along the rolling center line. The multiple first nozzles 321 are arranged along a straight line, and the arrangement direction of the multiple first nozzles 321 is consistent with the arrangement direction of the working roll 10, so that the surface of the working roll 10 is completely cleaned.

[0044] It should be noted that during the rolling process, the steel plate will show the characteristics of high temperature in the middle and low temperature at the edge. The water spray cooling device in the prior art will have a large temperature drop problem when performing cooling operations. Therefore, in order to solve this technical problem, the multiple first nozzles 321 provided in this embodiment are symmetrically distributed along the rolling center line, so that the flow rate of the water flow sprayed by the multiple first nozzles 321 is large in the middle and small on both sides, thereby realizing step cooling, and the middle position with high temperature on the working roll 10 is cooled by large flow water spray, and the edge position with lower temperature on the working roll 10 is cooled by small flow water spray, thereby improving the problem of large temperature drop.

[0045] Furthermore, during the water spray cooling process, the water sprayed from the first nozzle 321 located in the middle position will also flow out from the edge position, further achieving the effect of cooling the edge position.

[0046] In this embodiment, the spray center of the first nozzle 321 is aligned with the axial center position of the working roll 10 .

[0047] It is also necessary to explain that the support roller cooling member 33 includes a second pipe and a second nozzle 331 which are connected to each other. The second nozzle 331 is arranged toward the support roller 20. The second nozzle 331 is arranged above the first nozzle 321. The water outlet of the second nozzle 331 is a second water outlet. The second pipe is connected to an external water source, and the water source flows into the second nozzle 331 through the second pipe and is sprayed toward the surface of the support roller 20 from the second water outlet of the second nozzle 331.

[0048] In this embodiment, there are multiple second nozzles 331, all of which are connected to the second pipe, and the multiple second nozzles 331 are arranged in a straight line. The arrangement direction of the multiple second nozzles 331 is consistent with the arrangement direction of the support roller 20, so that the surface of the support roller 20 is completely cleaned.

[0049] Furthermore, the cooling mechanism 30 also includes a steel plate cooling member 34 , which is mounted on the frame 31 , and a third water outlet of the steel plate cooling member 34 sprays water toward the steel plate to cool and clean the surface of the steel plate.

[0050] In this embodiment, the steel plate cooling member 34 includes a third pipe and a third nozzle that are connected to each other, the third pipe is externally connected to a water source, and the water outlet of the third nozzle is a third water outlet. There are multiple third nozzles, all of which are located below the second nozzle 331, and the multiple third nozzles are arranged along a straight line.

[0051] It should also be explained that the upper rolling mill entrance upper roller cooling device also includes a power part 40, a steering block 50 and a scraper 60. The scraper 60 is installed at the bottom of the frame 31. The steering block 50 is connected to the frame 31. The power part 40 is connected to the frame 31 to drive the frame 31 to rotate around the steering block 50 until the scraper 60 is tangent to the surface of the working roll 10.

[0052] Specifically, the steering block 50 is embedded in the arch 70 and is limited by a limit pin to prevent the steering block 50 from excessive displacement. The frame 31 is hinged on the steering block 50, so that it rotates around the steering block 50 under the drive of the power member 40. The power member 40 can drive the frame 31 to move toward the direction close to the working roll 10. When the scraper 60 contacts the working roll 10, the power member 40 stops driving, and the working roll cooling member 32, the support roll cooling member 33 and the steel plate cooling member 34 spray water together, and the water flows down to the scraper 60 and flows out from both sides of the scraper 60, thereby preventing the water flow from falling directly on the surface of the strip.

[0053] It can be understood that the scraper 60 is a long strip structure.

[0054] In this embodiment, the power member 40 is an oil cylinder. In other embodiments, the power member 40 may also be an air cylinder or a motor, etc., which is not specifically limited here.

[0055] Furthermore, in order to protect the steel plate cooling member 34, a cover plate 80 is provided on the side of the steel plate cooling member 34 away from the working roll 10. The cover plate 80 covers the surface of the steel plate cooling member 34 to prevent damage to the steel plate cooling member 34 when the steel plate tilts during operation.

[0056] The embodiment of the present invention further provides a method for cooling the upper roller at the entrance of a finishing mill, wherein the upper roller cooling device at the entrance of the finishing mill is used for cooling. The cooling method comprises:

[0057] S1: The power member 40 drives the frame 31 to rotate around the steering block 50 until the scraper 60 and the surface of the working roller 10 are tangent.

[0058] Specifically, the power member 40 drives the frame 31 to move toward the direction close to the working roll 10 , and the power member 40 stops driving when the scraper 60 contacts the working roll 10 .

[0059] S2: Turn on the water source. After the water enters the cooling mechanism 30, it flows out from the first water outlet of the working roll cooling member 32, the second water outlet of the supporting roll cooling member 33 and the third water outlet of the steel plate cooling member 34, thereby cleaning and cooling the surfaces of the working roll 10, the supporting roll 20 and the steel plate respectively.

[0060] S3: When maintenance is required, the power member 40 drives the frame 31 to move in the opposite direction, driving the frame 31 away from the working roll 10 and the support roll 20, thereby providing maintenance space.

[0061] In summary, the embodiment of the present invention provides a cooling device and a cooling method for the upper roll at the entrance of a finishing mill, the cooling device for the upper roll at the entrance of a finishing mill comprises a working roll 10, a support roll 20 and a cooling mechanism 30, the support roll 20 is arranged above the working roll 10, the cooling mechanism 30 has a first water outlet and a second water outlet, the first water outlet is in contact with the working roll 10, the second water outlet is spaced apart from the support roll 20, the first water outlet is used to spray water toward the surface of the working roll 10 to cool and clean the surface of the working roll 10, and the second water outlet is used to spray water toward the surface of the support roll 20 to cool and clean the surface of the support roll 20. When in use, the first water outlet of the cooling mechanism 30 is in contact with the working roll 10, the first water outlet sprays water toward the surface of the working roll 10 to cool and clean the surface of the working roll 10, the second water outlet is spaced apart from the support roll 20, and the second water outlet is used to spray water toward the surface of the support roll 20 to cool and clean the surface of the support roll 20. The first water outlet and the second water outlet of the cooling mechanism 30 can clean and cool the working roll 10 and the backup roll 20 respectively, thereby improving the cooling efficiency.

[0062] The cooling method of the upper roller at the entrance of the finishing mill adopts the cooling device of the upper roller at the entrance of the finishing mill for cooling. The cooling method includes the following steps: the power member 40 drives the frame 31 to rotate around the steering block 50 until the scraper 60 and the surface of the working roller 10 are tangent; the water source is turned on, and the water flows out from the first water outlet, the second water outlet and the third water outlet after entering the cooling mechanism 30, so as to clean and cool the surfaces of the working roller 10, the support roller 20 and the steel plate respectively. When in use, the first water outlet of the cooling mechanism 30 contacts the working roller 10, and the first water outlet sprays water toward the surface of the working roller 10 to cool and clean the surface of the working roller 10. The second water outlet is arranged at intervals with the support roller 20, and the second water outlet is used to spray water toward the surface of the support roller 20 to cool and clean the surface of the support roller 20. The first water outlet and the second water outlet of the cooling mechanism 30 can clean and cool the working roller 10 and the support roller 20 respectively, thereby improving the cooling efficiency.

[0063] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A finishing mill inlet upper roll cooling device, characterized in that: include: Working roll (10); A support roller (20), wherein the support roller (20) is arranged above the working roller (10); A cooling mechanism (30), the cooling mechanism (30) comprising a first water outlet and a second water outlet, the first water outlet being in contact with the working roll (10), the second water outlet being spaced apart from the support roll (20), the first water outlet being used for spraying water toward the surface of the working roll (10) to cool and clean the surface of the working roll (10), and the second water outlet being used for spraying water toward the surface of the support roll (20) to cool and clean the surface of the support roll (20).

2. The cooling device for the upper roll at the entrance of the finishing mill according to claim 1, characterized in that: The cooling mechanism (30) comprises a frame (31), a working roller cooling member (32) and a supporting roller cooling member (33); the working roller cooling member (32) and the supporting roller cooling member (33) are both installed on the frame (31); the first water outlet is arranged on the working roller cooling member (32); and the second water outlet is arranged on the supporting roller cooling member (33).

3. The cooling device for the upper roll at the entrance of the finishing mill according to claim 2, characterized in that: The working roll cooling member (32) comprises a first pipe and a first nozzle (321) which are connected to each other. The water outlet of the first nozzle (321) is a first water outlet, and the first water outlet is tangent to the working roll (10).

4. The cooling device for the upper roll at the entrance of the finishing mill according to claim 3, characterized in that: There are a plurality of first nozzles (321), all of which are connected to the first pipe, and the plurality of first nozzles (321) are symmetrically distributed along the rolling center line.

5. The cooling device for the upper roll at the entrance of the finishing mill according to claim 3, characterized in that: The support roller cooling member (33) comprises a second pipe and a second nozzle (331) which are connected to each other. The second nozzle (331) is arranged toward the support roller (20). The second nozzle (331) is arranged above the first nozzle (321). The water outlet of the second nozzle (331) is a second water outlet.

6. The cooling device for the upper roll at the entrance of the finishing mill according to claim 5, characterized in that: There are a plurality of second nozzles (331), and the plurality of second nozzles (331) are all connected to the second pipe. The plurality of second nozzles (331) are arranged in a straight line.

7. The cooling device for the upper roll at the entrance of the finishing mill according to claim 2, characterized in that: The cooling mechanism (30) further comprises a steel plate cooling member (34), wherein the steel plate cooling member (34) is mounted on the frame (31), and a third water outlet of the steel plate cooling member (34) sprays water toward the steel plate to cool and clean the surface of the steel plate.

8. The cooling device for the upper roll at the entrance of the finishing mill according to claim 2, characterized in that: The upper roller cooling device at the entrance of the finishing mill also includes a power piece (40), a steering block (50) and a scraper (60), wherein the scraper (60) is installed at the bottom of the frame (31), the steering block (50) is connected to the frame (31), and the power piece (40) is connected to the frame (31) for driving the frame (31) to rotate around the steering block (50) until the scraper (60) and the surface of the working roller (10) are tangent.

9. The cooling device for the upper roll at the entrance of the finishing mill according to any one of claims 1 to 8, characterized in that: The finishing mill entrance upper roll cooling device further comprises a memorial arch (70), and the working roll (10), the support roll (20) and the cooling mechanism (30) are all installed on the memorial arch (70).

10. A method for cooling the upper roller at the entrance of a finishing mill, characterized in that: The cooling is performed by using a cooling device for the upper roller at the entrance of a finishing mill as claimed in any one of claims 1 to 9, wherein the cooling method comprises: The power member (40) drives the frame (31) to rotate around the steering block (50) until the scraper (60) and the surface of the working roller (10) are tangent to each other; The water source is turned on, and water enters the cooling mechanism (30) and flows out from the first water outlet, the second water outlet, and the third water outlet, respectively, thereby cleaning and cooling the surfaces of the working roll (10), the support roll (20), and the steel plate, respectively.

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