Strip steel cooling water collecting pipe between finishing mill racks

Abstract

The utility model provides a strip steel cooling water collecting pipe between finishing mill racks, which comprises a main pipe body, branch pipes, a water filling nozzle and nozzles, the main pipe body is provided with the water filling nozzle, the lower side of the main pipe body is provided with a plurality of rows of branch pipes, the plurality of rows of branch pipes are distributed in a row at equal intervals along the axial direction of the main pipe body, and each row is provided with four branch pipes. The four branch pipes in each row are distributed at equal intervals along the same radial direction of the main pipe body and are distributed parallel to the running direction of the strip steel, and one end of each branch pipe is provided with a nozzle; the four branch pipes are the first branch pipe, the second branch pipe, the third branch pipe and the fourth branch pipe in sequence, the first branch pipe and the second branch pipe spray water in the direction opposite to the running direction of the strip steel, the third branch pipe and the fourth branch pipe spray water in the running direction of the strip steel, and each branch pipe and the vertical strip steel direction are arranged at an angle. According to the utility model, the problems of poor strip steel shape, inconsistent structure property and the like caused by non-uniform transverse temperature are effectively avoided, and the yield and the quality grade of products in hot rolling and cold rolling procedures are improved.

Description

Technical Field

[0001] This utility model relates to the field of cooling equipment technology, and in particular to a strip cooling water manifold between finishing mill stands. Background Technology

[0002] During strip rolling, the strip between finishing mill stands needs cooling. The finishing mill exit temperature is monitored at the last stand, and precise control is used to achieve the target final rolling temperature, ensuring the performance and quality of the final hot-rolled product. Existing cooling water manifolds have several problems: uneven cooling water distribution; unreasonable manifold design leading to blockages, reduced cooling efficiency, increased equipment maintenance costs and downtime, hindering efficient and stable production. Inconsistent cooling effects across different parts of the strip affect its microstructure and shape, resulting in mill tension fluctuations and poor post-rolling shape during downstream cold rolling, leading to increased strip breakage frequency and a higher rate of product downgrading. Simultaneously, frequent slowdowns in the cold rolling mill severely impact production efficiency and increase production costs in the cold rolling process. Utility Model Content

[0003] To address the aforementioned technical problems, a strip cooling water manifold between finishing mill stands is provided. The technical means employed in this invention are as follows:

[0004] A strip cooling water manifold between finishing mill stands includes: a main body, branch pipes, water inlets, and nozzles. The main body is provided with water inlets. Multiple rows of branch pipes are provided on the lower side of the main body facing the strip. The multiple rows of branch pipes are evenly distributed in a row along the axial direction of the main body. Each row has four branch pipes. The four branch pipes in each row are evenly distributed along the same radial direction of the main body and are parallel to the running direction of the strip. A nozzle is installed on the end of each branch pipe away from the main body.

[0005] The four branch pipes are, from front to back, the first branch pipe, the second branch pipe, the third branch pipe, and the fourth branch pipe along the strip running direction. The first and second branch pipes spray water in the opposite direction to the strip running direction, while the third and fourth branch pipes spray water in the same direction as the strip running direction. The center lines of the first and second branch pipes and the center lines of the third and fourth branch pipes are symmetrically arranged about the direction perpendicular to the strip. Each branch pipe is set at an angle to the direction perpendicular to the strip.

[0006] Furthermore, the branch pipe has 10-12 rows.

[0007] Furthermore, anti-collision beams are installed between adjacent rows of branch pipes.

[0008] Furthermore, the second and third branch pipes form an angle of 12°-18° with the direction perpendicular to the strip steel.

[0009] Furthermore, the first branch pipe and the fourth branch pipe form an angle of 27°-33° with the direction perpendicular to the strip steel.

[0010] Furthermore, the lengths of the four branch pipes in each row are different, with the lengths of the second and third branch pipes being shorter than the lengths of the first and fourth branch pipes, and the length of the first branch pipe being either greater than or less than the length of the fourth branch pipe.

[0011] Furthermore, the nozzles on each of the four branch pipes in each row have the same orifice diameter, and the nozzles on adjacent rows of branch pipes may have the same or different orifice diameters.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. The strip cooling water manifold between finishing mill stands provided by this utility model plays a significant role in reducing the longitudinal temperature fluctuation range and the transverse temperature deviation of strip steel during the production process of hot-rolled strip mills. The longitudinal temperature fluctuation range of strip steel is reduced from ±30℃ to ±15℃, providing more stable strip steel temperature conditions for subsequent rolling processes, which helps to improve the quality and performance consistency of products; the transverse temperature deviation of strip steel is reduced from the original ±20℃ to about ±10℃, effectively avoiding problems such as poor strip shape and inconsistent microstructure and properties caused by uneven transverse temperature, and improving the yield and quality grade of products in each process of hot rolling and cold rolling.

[0014] 2. The strip cooling water manifold between the stands of the finishing mill provided by this utility model has multiple rows of branch pipes on the lower side of the main body, with 4 branch pipes in each row distributed parallel to the running direction of the strip. This allows the cooling water flow to form a uniform fan-shaped cooling area on the surface of the strip, ensuring the consistency of the cooling effect in all parts of the strip, thereby improving the quality and performance of the strip.

[0015] 3. The strip cooling water manifold between the finishing mill stands provided by this utility model has anti-collision beams arranged around the branch pipes to prevent the strip from touching the branch pipes and nozzles.

[0016] Based on the above reasons, this utility model can be widely promoted in fields such as strip cooling. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the arrangement of water spray nozzles between the racks in a specific embodiment of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of each row of branch pipes and nozzles in a specific embodiment of this utility model.

[0020] Figure 3 This is a schematic diagram of the nozzle structure in a specific embodiment of the present invention.

[0021] In the diagram: 1. Main pipe; 2. Branch pipe; 21. First branch pipe; 22. Second branch pipe; 23. Third branch pipe; 24. Fourth branch pipe; 3. Water inlet; 4. Nozzle. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Example 1

[0024] This utility model provides a cooling water manifold for strip steel between finishing mill stands, relating to the technical field of hot-rolled strip steel rolling equipment. When this utility model is used in the hot-rolled strip steel production process, to ensure the control accuracy of the final rolling temperature and the overall temperature uniformity of the rolled piece, the opening degree of the manifold is controlled by a solenoid valve. This allows for increasing or decreasing the water spray volume to bring the surface temperature of the rolled piece to the set target temperature, ultimately ensuring that the temperature deviation of the entire coil is controlled within a certain range, thereby guaranteeing the final product performance and strip shape quality of the strip steel. Simultaneously, the stable control of the strip steel temperature between stands is also highly beneficial for ensuring the control accuracy of six major quality indicators: strip thickness, width, crown, straightness, final rolling temperature, and coiling temperature.

[0025] This utility model discloses a strip cooling water manifold between stands of a finishing mill, comprising: a main body 1, branch pipes 2, water inlets 3, and nozzles 4. The main body 1 is provided with water inlets 3. Multiple rows of branch pipes 2 are arranged on the lower side of the main body 1 facing the strip. These multiple rows of branch pipes 2 are evenly spaced along the axial direction of the main body 1, with four branch pipes 2 per row. The four branch pipes 2 in each row are evenly spaced along the same radial direction of the main body 1, and are parallel to the strip running direction. A nozzle is installed at the end of each branch pipe 2 away from the main body. Nozzle 4; Four branch pipes 2 are arranged from front to back along the strip running direction as first branch pipe 21, second branch pipe 22, third branch pipe 23 and fourth branch pipe 24. First branch pipe 21 and second branch pipe 22 spray water in the opposite direction of strip running direction, and third branch pipe 23 and fourth branch pipe 24 spray water in the same direction as strip running direction. The center lines of first branch pipe 21 and second branch pipe 22 and the center lines of third branch pipe 23 and fourth branch pipe 24 are symmetrically arranged about the direction perpendicular to strip running direction. Each branch pipe 2 is set at an angle to the direction perpendicular to strip running direction.

[0026] Preferably, branch pipe 2 has 10-12 rows.

[0027] Preferably, a crossbeam is provided between two adjacent rows of branch pipes 2.

[0028] Preferably, the second branch pipe 22 and the third branch pipe 23 form an angle of 12°-18° with the direction perpendicular to the strip steel.

[0029] Preferably, the first branch pipe 21 and the fourth branch pipe 24 form an angle of 27°-33° with the direction perpendicular to the strip.

[0030] Preferably, the lengths of the four branch pipes 2 in each row are different, the lengths of the second branch pipe 22 and the third branch pipe 23 are less than the lengths of the first branch pipe 21 and the fourth branch pipe 24, and the length of the first branch pipe 21 is greater than or less than the length of the fourth branch pipe 24.

[0031] Preferably, the nozzles 4 on each row of four branch pipes 2 have the same orifice diameter, and the nozzles 4 on adjacent rows of branch pipes 2 may have the same or different orifice diameters.

[0032] Example 2

[0033] In this embodiment, the strip cooling water manifold between the finishing mill stands mainly consists of a main pipe 1, branch pipes 2, water inlets 3, nozzles 4, and anti-collision ribs (anti-collision beams). Water inlets 3 are provided on both sides of the main pipe 1. The main pipe 1 is made of high-quality alloy steel, which has good strength and corrosion resistance.

[0034] The lower side of the main body 1 is provided with 11 rows of branch pipes 2. The 11 rows of branch pipes 2 are evenly distributed in a row along the axial direction of the main body 1. Each row of 4 branch pipes 2 is evenly distributed along the same radial direction of the main body 1. Each row of 4 branch pipes 2 is welded to the main body 1 to ensure a firm connection and good sealing. A nozzle 4 is installed on the end of each branch pipe 2 away from the main body. The four branch pipes 2 in each row are arranged from front to back along the running direction of the strip as the first branch pipe 21, the second branch pipe 22, the third branch pipe 23, and the fourth branch pipe 24, that is, the second branch pipe 22 and the third branch pipe 23 are located in the middle, and the first branch pipe 21 and the fourth branch pipe 24 are located on both sides.

[0035] The nozzles of the four branch pipes 2 in each row are distributed parallel to the running direction of the strip, and the spray angle is parallel to the running direction of the strip. Two of the four branch pipes 2 in each row (the first branch pipe 21 and the second branch pipe 22) spray water in the opposite direction to the running direction of the strip, while the other two branch pipes 2 (the first branch pipe 21 and the fourth branch pipe 24) spray water in the running direction of the strip. The center lines of the first branch pipe 21 and the second branch pipe 22 are symmetrically arranged with respect to the direction perpendicular to the strip with respect to the center lines of the third branch pipe 23 and the fourth branch pipe 24.

[0036] The second branch pipe 22 and the third branch pipe 23 form a 15° angle with the direction perpendicular to the strip steel, while the first branch pipe 21 and the fourth branch pipe 24 form a 30° angle with the direction perpendicular to the strip steel.

[0037] The lengths of the four branch pipes 2 in each row are different. The lengths of the second branch pipe 22 and the third branch pipe 23 are less than the lengths of the first branch pipe 21 and the fourth branch pipe 24. The length of the first branch pipe 21 is greater than or less than the length of the fourth branch pipe 24.

[0038] The nozzles 4 on each of the four branch pipes 2 in each row have the same orifice diameter, and the nozzles 4 on adjacent rows of branch pipes 2 may have the same or different orifice diameters. Based on their distance from the center line of the rolling mill, the orifice diameters of the 11 rows of nozzles 4 gradually change symmetrically from the sides to the middle. That is, the nozzles 4 in the middle row (row 6) have the smallest orifice diameter, while the nozzles 4 in the outermost rows on the left and right sides (rows 1 and 11) have the largest orifice diameters. The orifice diameter gradually decreases from row 1 to row 6, and correspondingly, it gradually increases from row 6 to row 11. Alternatively, a "3+5+3" configuration can be adopted, where the orifice diameters of rows 1, 2, 3, 9, 10, and 11 are the same, with a nozzle specification of 665.063. The orifice diameters of rows 4 to 8 are the same, with a nozzle specification of 664.884.

[0039] The cooling water flow forms a uniform fan-shaped cooling area on the surface of the strip steel, ensuring the consistency of cooling effect in all parts of the strip steel, thereby improving the quality and performance of the strip steel.

[0040] Eleven anti-collision beams (not shown in the figure) are arranged around the perimeter of branch pipe 2 to prevent the steel strip from touching branch pipe 2 and nozzle 4. One anti-collision beam is installed between every two adjacent rows of branch pipe 2, and the anti-collision beams are welded to the main pipe body 1, using existing structural forms. The eleven anti-collision beams are distributed in a row along the axial direction of the main pipe body 1. The radial length of the anti-collision beams is greater than the total length of the branch pipe 2 and nozzle 4.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A finishing stand inter- strip cooling water header characterized by, include: The main body (1), branch pipes (2), water inlet (3) and nozzle (4) are provided. The main body (1) is provided with water inlet (3). The lower side of the main body (1) facing the strip is provided with multiple rows of branch pipes (2). The multiple rows of branch pipes (2) are distributed in a row at equal intervals along the axial direction of the main body (1). Each row has four branch pipes (2). The four branch pipes (2) in each row are distributed at equal intervals along the same radial direction of the main body (1). The four branch pipes (2) in each row are distributed parallel to the running direction of the strip. The end of each branch pipe (2) away from the main body is equipped with a nozzle (4). The four branch pipes (2) are arranged from front to back along the strip running direction as the first branch pipe (21), the second branch pipe (22), the third branch pipe (23), and the fourth branch pipe (24). The first branch pipe (21) and the second branch pipe (22) spray water in the opposite direction to the strip running direction, while the third branch pipe (23) and the fourth branch pipe (24) spray water in the same direction as the strip running direction. The center lines of the first branch pipe (21) and the second branch pipe (22) are symmetrically arranged with respect to the direction perpendicular to the strip with respect to the center lines of the third branch pipe (23) and the fourth branch pipe (24). Each branch pipe (2) is arranged at an angle to the direction perpendicular to the strip.

2. The finishing stand inter-stand strip cooling water header according to claim 1, characterized in that, The branch pipe (2) has 10-12 rows.

3. The strip cooling water manifold between finishing mill stands according to claim 1, characterized in that, Anti-collision beams are installed between two adjacent rows of branch pipes (2).

4. The finishing stand inter-stand strip cooling water header according to claim 1, characterized in that, The second branch pipe (22) and the third branch pipe (23) form an angle of 12°-18° with the direction perpendicular to the strip.

5. The finishing stand inter-stand strip cooling water header according to claim 1, characterized in that, The first branch pipe (21) and the fourth branch pipe (24) form an angle of 27°-33° with the direction perpendicular to the strip.

6. The strip cooling water manifold between finishing mill stands according to claim 1, characterized in that, The four branch pipes (2) in each row have different lengths. The lengths of the second branch pipe (22) and the third branch pipe (23) are less than the lengths of the first branch pipe (21) and the fourth branch pipe (24). The length of the first branch pipe (21) is greater than or less than the length of the fourth branch pipe (24).

7. The finishing stand inter-stand strip cooling water header according to claim 1, characterized in that, The nozzles (4) on each row of four branch pipes (2) have the same orifice diameter, and the nozzles (4) on adjacent rows of branch pipes (2) have the same or different orifice diameters.

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