Roller cooling system of high-speed wire rod finishing mill
By setting cooling components and liquid outlet holes inside the rollers, uniform cooling of the rollers is achieved, solving the problems of uneven roller temperature and coolant splashing, and improving rolling accuracy and product quality.
Patent Information
- Application Number
- CN202422272787.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-18
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-09-18
AI Technical Summary
The existing roller cooling system sprays unevenly at high temperatures, resulting in severe roller wear, affecting rolling accuracy and wire quality, and coolant splashing, affecting product quality.
A roller internal cooling system is designed. By setting cooling components and liquid outlet holes inside the roller, the coolant circulates inside the roller to achieve uniform cooling, and the sealing structure prevents coolant leakage.
It improves the cooling effect and service life of the rollers, stabilizes the rolling temperature, improves the wire rolling quality, and avoids splashing and waste of coolant.
Smart Images
Figure CN223338046U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of steel rolling production equipment, and in particular relates to a roller cooling system for a high-speed wire rod finishing mill. Background Art
[0002] The finishing mill is the most critical equipment in a hot rolling production line, used to convert the roughing mill's incoming intermediate bar into the desired product strip. The finishing mill primarily consists of an intermediate roller table, a flying shear, a descaling box, vertical rollers, and multiple finishing mills. The intermediate roller table primarily transports the intermediate bar from the roughing mill to the finishing mill. The flying shear removes irregularities at the ends of the intermediate bar. The descaling box descales the surface of the intermediate bar. The vertical rollers guide the intermediate bar along the roll centerline. Multiple finishing mills gradually reduce the intermediate bar from its semi-finished thickness to the desired finished strip thickness. Each finishing mill consists of a pair of support rolls and rollers arranged in a vertical and horizontal arrangement. After exiting the roughing mill, the intermediate bar is conveyed via the intermediate roller table to the flying shear for removal of irregularities. The bar then enters the descaling box for surface descaling. The vertical rollers then guide the intermediate bar into the finishing mill's rolls, where it is rolled into strip and discharged via the run-out roller table. At present, the rolling production of the coils in the high-speed wire mill of the steel plant is carried out 24 hours a day. Under the action of the high-temperature wire rod moving at high speed for a long time, the temperature of the rollers will rise. As the temperature gradually rises, the rollers will gradually wear out, reducing the rolling accuracy, and thus affecting the quality of the finished wire rod. In order to reduce the temperature of the rollers and improve the accuracy of wire rod rolling, in the existing technology, a spray device is used to spray and cool the surface of the wire rod. The existing spray device is arranged below and above the roller. During use, it cannot spray and cool the roller well. The spraying is often uneven and the cooling effect is not ideal. At the same time, the sprayed cold ash will splash onto the wire rod to be rolled, which will reduce the rolling temperature of the wire rod and affect the rolling quality of the wire rod. Therefore, the purpose of this device is to develop a high-speed wire rod finishing mill roller cooling system with reasonable structural design, good cooling effect, and the ability to effectively improve rolling quality. Summary of the Invention
[0003] The purpose of the utility model is to provide a high-speed wire rod finishing mill roll cooling system which has reasonable structural design, good cooling effect and can effectively improve rolling quality.
[0004] The purpose of the present utility model is achieved in this way, including a frame, finishing rollers symmetrically installed on the frame up and down, and a driving mechanism for driving the finishing rollers to rotate, the finishing rollers including a roller body and a first shaft head and a second shaft head installed at both ends of the roller body, the first shaft head and the second shaft head are both hollow structures, the end of the first shaft head is connected to a rotating joint, the rotating joint is connected to a liquid inlet pipe, the liquid inlet pipe is installed with a control valve, a partition is installed in the roller body close to the first shaft head, the partition divides the inner cavity of the roller body into a distribution cavity and a cooling cavity, a cooling component is provided in the cooling cavity, a sealing plate is installed at the end of the second shaft head, a plurality of liquid outlets are evenly distributed circumferentially on the second shaft head between the roller body and the sealing plate, a sealing cylinder is provided on the outside of the second shaft head around the liquid outlet, and a drain pipe is provided at the bottom of the sealing cylinder.
[0005] Compared with the traditional roller external spraying treatment, the advantages of this device are: First, the structure of the roller body is optimized, and the cooling and cooling component is arranged inside the roller body. After the coolant enters the cooling and cooling component, the cooling and cooling component can evenly cool the outer surface of the roller body, which can effectively improve the cooling and cooling effect of the roller; Second, the coolant flows in the first shaft head, the roller body and the second shaft head, which can evenly cool the roller body, and can ensure the temperature stability of the roller body for a long time, which is beneficial to improving the rolling quality of the product. At the same time, it can also increase the service life of the roller, and there will be no problem of coolant leakage, which solves the problem of coolant splashing affecting the rolling quality. The structural design of this device is reasonable, which can not only achieve uniform cooling of the roller body, but also solve the problem of coolant splashing affecting the rolling quality of the product, and is easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS
[0006] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0007] Figure 2 This is a schematic structural diagram of the roller body 2 in the present invention;
[0008] In the figure: 1-frame, 2-roller body, 3-first shaft head, 4-second shaft head, 5-rotating joint, 6-liquid inlet pipe, 7-partition, 8-distribution chamber, 9-cooling chamber, 10-sealing plate, 11-liquid outlet, 12-sealing cylinder, 13-drain pipe, 14-primary cooling cylinder, 15-secondary cooling cylinder, 16-distribution hole, 17-primary cooling hole, 18-secondary cooling hole, 19-support ring plate, 20-inner support ring, 21-outer support ring, 22-heat conducting layer, 23-liquid collecting tank, 24-circulation pipe, 25-cooler, 26-cooling pipe, 27-cooling fan, 28-air inlet, 29-filter. DETAILED DESCRIPTION
[0009] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes or improvements made based on the teachings of the present invention shall fall within the scope of protection of the present invention.
[0010] like Figures 1-2 As shown, the utility model includes a frame 1, a finishing roller symmetrically mounted on the frame, and a driving mechanism for driving the finishing roller to rotate. The connection structure between the driving mechanism and the finishing roller is the existing technology. The finishing roller includes a roller body 2 and a first shaft head 3 and a second shaft head 4 mounted at both ends of the roller body 2. The first shaft head 3 and the second shaft head 4 are both hollow structures. The first shaft head 3 and the second shaft head 4 are rotatably mounted on the frame 1 through a bearing assembly. The end of the first shaft head 3 is connected to a rotating joint 5. The rotating joint 5 is the existing technology. The rotating joint 5 is connected to a liquid inlet pipe 6. The rotating joint 5 is used to connect the liquid inlet Tube 6 and the first shaft head 3, a control valve is installed on the liquid inlet pipe 6, a partition 7 is installed in the roller body 2 near the side of the first shaft head 3, the partition 7 divides the inner cavity of the roller body 2 into a distribution cavity 8 and a cooling cavity 9, and a cooling component is provided in the cooling cavity 9, a sealing plate 10 is installed at the end of the second shaft head 4, and a driving mechanism is rotatably installed at the end of the second shaft head 4, and a plurality of liquid outlet holes 11 are uniformly distributed in an annular direction on the second shaft head 4 between the roller body 2 and the sealing plate 10, a sealing cylinder 12 is provided on the outside of the second shaft head 4 around the liquid outlet hole 11, and a drain pipe 13 is provided at the bottom of the sealing cylinder 12.
[0011] The method of using this device is that when the roller rolls the high-temperature wire, the driving mechanism drives the second shaft head 4 to rotate, and then drives the roller body 2 and the first shaft head 3 to rotate. In the process of the roller body 2 rolling the high-temperature wire, the control valve on the liquid inlet pipe 6 is opened, and the coolant will enter the first shaft head 3 through the liquid inlet pipe 6, and then enter the distribution chamber 8, and then enter the cooling and cooling component through the distribution chamber 8. In the process of the coolant flowing in the cooling and cooling component, it will absorb the heat on the surface of the roller body 2, thereby achieving the cooling and cooling effect. The coolant after absorbing the heat is discharged through the liquid outlet 11 on the second shaft head 4, enters the sealing cylinder 12, and is finally discharged from the drain pipe 13. The coolant is discharged from the first shaft head 3, By circulating the coolant in the roller body 2 and the second shaft head 4, the roller body 2 can be evenly cooled, and the temperature of the roller body 2 can be kept stable for a long time, which is beneficial to improving the rolling quality of the product and also improving the service life of the roller. The device arranges the cooling and cooling component inside the roller body 2, and adopts the roller inner cooling method to cool the roller body 2, which can effectively improve the cooling and cooling effect of the roller body 2. At the same time, the coolant flows in the first shaft 3 head, the roller body 2 and the second shaft head 4, and there will be no problem of coolant leakage. On the one hand, it solves the problem of coolant splashing affecting the rolling quality, and on the other hand, it is convenient to collect the coolant, which can avoid the waste of coolant and has a good energy-saving effect.
[0012] Furthermore, the cooling and cooling component can adopt the threaded tube structure used in the prior art. The cooling and cooling component described in the present device includes a coaxially arranged primary cooling cylinder 14 and a secondary cooling cylinder 15. The primary cooling cylinder 14 is installed inside the roller body 2. A plurality of distribution holes 16 are uniformly distributed on the partition 7 between the primary cooling cylinder 14 and the roller body 2. A plurality of heat dissipating members are installed at equal intervals in the space between the primary cooling cylinder 14 and the roller body 2. A plurality of primary cooling holes 17 are circumferentially processed on the primary cooling cylinder 14 near the side of the second shaft head 4. The secondary cooling cylinder 15 is installed on the roller body 2. Inside the primary cooling cylinder 14, a plurality of secondary cooling holes 18 are evenly distributed in the circumferential direction on the secondary cooling cylinder 14 near the side of the partition 7. When the cooling component cools the roll body 2, the coolant in the distribution cavity 8 first enters the space between the primary cooling cylinder 14 and the roll body 2 through the distribution holes 16, and first cools the roll body 2. After that, the cooling water enters the space between the primary cooling cylinder 14 and the secondary cooling cylinder 15 through the primary cooling holes 17. Finally, the coolant with increased temperature enters the secondary cooling cylinder 15 through the secondary cooling holes 18, is discharged through the second shaft head 4, and passes through the primary cooling cylinder 14. The cooling cylinder 14 and the secondary cooling cylinder 15 guide the coolant so that the coolant flows through three cooling zones with different temperatures, so that the water cooling with lower temperature is concentrated in the outermost layer, and then enters the two inner layers after cooling, so that the roller body can be evenly cooled and the overall cooling effect can be improved. Preferably, in order to improve the cooling effect on the roller body 2 and extend the contact time between the coolant and the roller body 2, the heat sink includes a support ring plate 19 and a plurality of heat dissipating fins evenly installed on the support ring plate 19, the outer side of the support ring plate 19 is fixedly installed on the inner wall of the roller body 2, and the inner side of the support ring plate 19 is fixedly installed on the inner wall of the roller body 2. There is a gap between the first-level cooling cylinder 14, and the heat dissipation fins and the support ring plate 19 can increase the contact area with the coolant, which can further improve the cooling effect of the roller body 2. A plurality of inner support rings 20 are installed at equal intervals on the inner wall of the first-level cooling cylinder 14, and a plurality of outer support rings 21 are installed at equal intervals on the outer wall of the second-level cooling cylinder 15. The inner support rings 20 and the outer support rings 21 are arranged in an interlaced manner. The coolant flows in a curved shape between the inner support rings 20 and the outer support rings 21, which can extend the contact time with the coolant, thereby significantly improving the cooling effect of the roller body 2.
[0013] Furthermore, a heat-conducting layer 22 is provided inside the roller body 2. The heat-conducting layer 22 can be made of stainless steel with good heat conduction effect. The heat-conducting layer 22 can transfer the heat generated by the roller body 2 inward to fully contact with the coolant, thereby improving the cooling effect of the roller body 2.
[0014] Furthermore, in order to avoid the waste of coolant and realize the recycling of coolant, a liquid collecting tank 23 is installed at the end of the drain pipe 13, and a circulation pipe 24 connected to the liquid inlet pipe 6 is provided on the liquid collecting tank 23. A cooler 25 and a liquid inlet pump are installed on the circulation pipe 24 in sequence. A cooling pipe 26 connected to the circulation pipe 24 is provided in the cooler 25. A plurality of cooling fans 27 are provided on the inner wall of the cooler 25. The cooling fan 27 is a prior art and can be directly purchased as a finished product according to the power used. An air inlet 28 is provided on the cooler 25 at 7. The coolant discharged from the drain pipe 13 enters the cooling pipe 26 of the cooler 25. Multiple cooling fans 27 are provided to blow air to cool the cooling pipe 26, thereby cooling the coolant. The cooled coolant enters the liquid inlet pipe 6 through the circulation pipe 24 for recycling. Preferably, in order to increase and extend the contact time between the coolant in the cooling pipe 26 and the cooling fan 27, the cooling pipe 26 is a serpentine curved pipe structure or a spirally arranged coil structure. To prevent dust from entering the cooler 25, a filter 29 is provided on the air inlet 28.
Claims
1. A roller cooling system for a high-speed wire rod finishing mill, comprising a frame (1), finishing rollers symmetrically mounted on the frame, and a drive mechanism for driving the finishing rollers to rotate, characterized in that: The finishing roller comprises a roller body (2) and a first shaft head (3) and a second shaft head (4) installed at both ends of the roller body (2). The first shaft head (3) and the second shaft head (4) are both hollow structures. The end of the first shaft head (3) is connected to a rotary joint (5). The rotary joint (5) is connected to a liquid inlet pipe (6). The liquid inlet pipe (6) is installed with a control valve. A partition (7) is installed in the roller body (2) near the first shaft head (3). The partition (7) divides the inner cavity of the roller body (2) into a distribution cavity (8) and a cooling cavity (9). A cooling component is provided in the cooling cavity (9). A sealing plate (10) is installed at the end of the second shaft head (4). A plurality of liquid outlet holes (11) are evenly distributed circumferentially on the second shaft head (4) between the roller body (2) and the sealing plate (10). The second liquid outlet holes (11) are surrounded by a second A sealing cylinder (12) is provided on the outside of the shaft head (4), and a drain pipe (13) is provided at the bottom of the sealing cylinder (12); the cooling and temperature reduction component includes a coaxially arranged primary cooling cylinder (14) and a secondary cooling cylinder (15), the primary cooling cylinder (14) is installed inside the roller body (2), a plurality of distribution holes (16) are uniformly distributed circumferentially on the partition (7) between the primary cooling cylinder (14) and the roller body (2), a plurality of heat dissipating parts are installed at equal intervals in the space between the primary cooling cylinder (14) and the roller body (2), a plurality of primary cooling holes (17) are circumferentially processed on the primary cooling cylinder (14) near the second shaft head (4), the secondary cooling cylinder (15) is installed inside the primary cooling cylinder (14), and a plurality of secondary cooling holes (18) are uniformly distributed circumferentially on the secondary cooling cylinder (15) near the partition (7).
2. A high-speed wire rod finishing mill roll cooling system according to claim 1, characterized in that: The heat dissipation component includes a support ring plate (19) and a plurality of heat dissipation fins evenly distributed on the support ring plate (19); the outer side of the support ring plate (19) is fixedly mounted on the inner wall of the roller body (2); and a gap is left between the inner side of the support ring plate (19) and the primary cooling cylinder (14).
3. The high-speed wire rod finishing mill roll cooling system according to claim 1, characterized in that: A plurality of inner support rings (20) are installed at equal intervals on the inner wall of the first-stage cooling cylinder (14), and a plurality of outer support rings (21) are installed at equal intervals on the outer wall of the second-stage cooling cylinder (15), and the inner support rings (20) and the outer support rings (21) are arranged in an alternating manner.
4. The high-speed wire rod finishing mill roll cooling system according to claim 1, characterized in that: A heat-conducting layer (22) is provided inside the roller body (2).
5. The high-speed wire rod finishing mill roll cooling system according to claim 1, characterized in that: A liquid collecting trough (23) is installed at the end of the liquid discharge pipe (13), a circulation pipe (24) connected to the liquid inlet pipe (6) is provided on the liquid collecting trough (23), a cooler (25) and a liquid inlet pump are installed on the circulation pipe (24) in sequence, a cooling pipe (26) connected to the circulation pipe (24) is provided in the cooler (25), a plurality of cooling fans (27) are provided on the inner wall of the cooler (25), and an air inlet (28) is provided on the cooler (25) near the cooling fan (27).
6. A high-speed wire rod finishing mill roll cooling system according to claim 5, characterized in that: The cooling pipe (26) is a curved pipe structure arranged in a serpentine shape or a coil structure arranged in a spiral shape.
7. The high-speed wire rod finishing mill roll cooling system according to claim 5, characterized in that: A filter screen (29) is provided on the air inlet (28).