Roll cooling device for hot strip production
Patent Information
- Application Number
- CN202522017172.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-19
- Publication Date
- 2026-08-18
- Estimated Expiration
- 2035-09-19
AI Technical Summary
[0006]因此，本实用新型目的是提供一种热轧带钢生产用轧辊冷却装置，能够解决现有轧辊冷却装置缺乏冷却水回收循环及有效过滤、导致喷嘴堵塞、冷却不均匀、轧辊表面温度波动增大并引起带钢质量下降及设备维护频次增加的问题
1、本方案设计的轧辊冷却装置，通过在水冷循环箱两侧设置循环泵机，并结合循环输送管路、导流支管及高压喷头构成闭路水循环冷却系统，在工作过程中，一组循环泵机负责将水冷循环箱内的冷却水持续输送至循环输送管路和导流支管，另一组循环泵机则同时负责将管路内残余的冷却水回抽至水冷循环箱，形成进水与回水的动态平衡，使冷却水始终处于循环流动状态，随着高压喷头的开启，冷却水能够在第一热轧辊与第二热轧辊表面实现均匀喷淋，不仅提升了冷却的全面性和均匀性，还能在热轧带钢加工完成并导出时，对轧辊表面进行持续降温，避免因表面温度波动过大造成带钢厚度不稳定、表面质量下降的问题。
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Figure CN224641925U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of roll cooling technology, and in particular to a roll cooling device for hot-rolled strip steel production. Background Technology
[0002] Roll cooling devices are auxiliary equipment used in steel rolling production lines and rolling mills. Their main function is to cool the surface of rolls that operate at high speeds and are subjected to high temperatures and pressures, ensuring the stability and service life of the rolls during operation. Because rolls come into direct contact with high-temperature metal during rolling, generating a large amount of frictional heat, if not cooled in time, the roll temperature can easily become too high, leading to thermal fatigue, thermal cracking, or even surface spalling, thus affecting the dimensional accuracy and surface quality of the rolled products.
[0003] In the production process of hot-rolled strip steel, the rolls are a key working component, and their surface temperature directly affects the rolling quality and roll service life. Currently, most existing roll cooling devices use spray water cooling to cool the roll surface. However, they generally lack a structure design for cooling water recycling and effective filtration. This results in the cooling water after spraying not being effectively recycled. Even if it is recycled, it is difficult to fully intercept and filter impurities. During long-term operation, impurities tend to accumulate in the water circulation system and cause nozzle blockage, leading to uneven spraying during the spray cooling process. This, in turn, results in uneven cooling of the roll surface and increased surface temperature fluctuations. This not only affects the thickness accuracy and surface quality of the strip steel but also increases the frequency of equipment maintenance and operating costs.
[0004] Based on this, we propose a roll cooling device for hot-rolled strip steel production to solve the problems mentioned above. Utility Model Content
[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of the present invention, to avoid obscuring the purpose of these documents, and such simplifications or omissions should not be construed as limiting the scope of the present invention.
[0006] Therefore, the purpose of this utility model is to provide a roll cooling device for hot-rolled strip steel production, which can solve the problems of existing roll cooling devices lacking cooling water recycling and effective filtration, resulting in nozzle blockage, uneven cooling, increased temperature fluctuations on the roll surface, and consequently, reduced strip steel quality and increased equipment maintenance frequency.
[0007] To solve the above technical problems, this utility model provides a roll cooling device for hot-rolled strip steel production, which adopts the following technical solution: it includes a roll adjusting frame, a water-cooled circulation box is provided at the bottom of the roll adjusting frame, a water-cooled circulation assembly is provided between the roll adjusting frame and the water-cooled circulation box, the water-cooled circulation assembly includes two sets of circulation conveying pipelines, several sets of guide branch pipes are connected between the two sets of circulation conveying pipelines, and several sets of high-pressure nozzles are equidistantly distributed on one side of the guide branch pipes; The bottom of the roll adjustment frame is provided with four sets of first hot rolls, and a transmission gear plate is installed at one end of each of the two sets of first hot rolls. The roll adjustment frame is also provided with three sets of roll adjustment components near the top of the first hot rolls.
[0008] Optionally, a drive gear is installed at one end of each of the four sets of the first hot rolling rolls, and a drive chain is connected between two sets of the drive gears.
[0009] Optionally, the bottom of the roll adjusting frame is provided with a guide groove, and several sets of guide grooves are provided on both sides of the roll adjusting frame. Guide sliders are respectively provided on both sides of the inner wall of the guide groove.
[0010] Optionally, a circulation pump is installed on both sides of the water-cooled circulation box, a limit ring is provided around the inside of the water-cooled circulation box, and an embedded slot is provided at each end of the water-cooled circulation box.
[0011] Optionally, a filter screen is installed on the top of the water-cooled circulation tank. The filter screen matches the limiting ring structure. Both outer ends of the filter screen are connected to embedded clips. The embedded clips and embedded slots are engaged. Limiting grooves are opened on both sides of the inner wall of the filter screen. A cleaning brush is slidably connected between the two sets of limiting grooves. The cleaning brush and the mesh surface of the filter screen are in contact engagement.
[0012] Optionally, the roll adjustment assembly includes a second hot roll, both ends of which are connected to guide blocks via bearings. Each guide block has a positioning groove on both sides, which matches the structure of the guide slider. The positioning groove and the guide slider are in sliding fit. The top of the guide block is connected to an adjusting screw via a bearing, and the middle of the adjusting screw is threaded to a fixing plate.
[0013] In summary, this utility model has at least one of the following beneficial effects: 1. The roll cooling device designed in this scheme forms a closed-loop water circulation cooling system by setting up circulating pumps on both sides of the water-cooled circulation tank, combined with circulating delivery pipelines, guide branch pipes, and high-pressure nozzles. During operation, one set of circulating pumps is responsible for continuously delivering cooling water from the water-cooled circulation tank to the circulating delivery pipelines and guide branch pipes, while the other set of circulating pumps is responsible for simultaneously pumping the residual cooling water in the pipelines back to the water-cooled circulation tank, forming a dynamic balance between water inlet and water return, so that the cooling water is always in a state of circulation. With the opening of the high-pressure nozzles, the cooling water can be evenly sprayed on the surface of the first and second hot rolls, which not only improves the comprehensiveness and uniformity of cooling, but also continuously cools the roll surface when the hot-rolled strip is processed and exported, avoiding the problem of unstable strip thickness and decreased surface quality caused by excessive surface temperature fluctuations.
[0014] 2. The roll cooling device designed in this scheme features a filter screen plate installed at the top of the water-cooled circulation tank. The filter screen plate is reliably positioned at the opening of the circulation tank using a limiting ring, an embedded slot, and an embedded plate. This design facilitates easy disassembly and replacement. A cleaning brush is slidably connected inside the filter screen plate, maintaining contact with the screen surface. This allows for simultaneous cleaning of particulate impurities adhering to the screen surface during the cooling water recirculation process, effectively preventing impurities from clogging the mesh and reducing filtration efficiency. The filtration and cleaning structure prevents impurities in the cooling water from accumulating at the bottom of the water-cooled circulation tank or clogging the nozzles, ensuring a continuous and stable spraying effect. This maintains uniform cooling of the roll surface, improves cooling efficiency, and enhances the overall operational reliability of the production line. This design not only improves the environmental friendliness and energy efficiency of the device but also significantly reduces equipment maintenance frequency and spare parts replacement costs, further improving the economic benefits and sustainability of production. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the roll adjustment frame structure of this utility model; Figure 3 This is a schematic diagram showing the disassembled water-cooled circulation tank of this utility model; Figure 4 This is a schematic diagram of the water-cooled circulation component of this utility model.
[0017] Explanation of reference numerals in the attached drawings: 1. Roll adjustment frame; 2. Water-cooled circulation box; 3. Water-cooled circulation assembly; 4. Circulation conveying pipeline; 5. Guide branch pipe; 6. High-pressure nozzle; 7. First hot rolling roll; 8. Transmission gear plate; 9. Roll adjustment assembly; 10. Drive gear plate; 11. Drive chain; 12. Guide channel; 13. Guide groove; 14. Guide slider; 15. Circulation pump; 16. Limiting retaining ring; 17. Embedded slot; 18. Filter screen; 19. Embedded plate; 20. Limiting slide groove; 21. Cleaning brush; 22. Second hot rolling roll; 23. Guide block; 24. Positioning slide groove; 25. Adjusting screw; 26. Fixing frame plate. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] Example: Refer to Figures 1 to 4 This utility model provides an embodiment of a roll cooling device for hot-rolled strip steel production, comprising a roll adjusting frame 1, a water-cooled circulation box 2 at the bottom of the roll adjusting frame 1, a water-cooled circulation assembly 3 between the roll adjusting frame 1 and the water-cooled circulation box 2, the water-cooled circulation assembly 3 including two sets of circulation conveying pipes 4, several sets of guide branch pipes 5 connected between the two sets of circulation conveying pipes 4, several sets of high-pressure nozzles 6 evenly distributed on one side of the guide branch pipes 5, four sets of first hot rolling rolls 7 at the bottom of the roll adjusting frame 1, and a transmission gear plate installed at one end of each of the two sets of first hot rolling rolls 7. 8. Three sets of roll adjustment components 9 are also provided near the top of the first hot roll 7 of the roll adjustment frame 1. The roll cooling device mainly consists of the roll adjustment frame 1, the water cooling circulation box 2 and the water cooling circulation components 3. The water cooling circulation box 2 is equipped with a circulation pump 15, a limit ring 16, an embedded slot 17 and a filter screen 18. One circulation pump 15 is arranged on each side. The circulation pump 15 is connected to several sets of guide branch pipes 5 through two sets of circulation conveying pipelines 4. Several sets of high-pressure nozzles 6 are equidistantly arranged on one side of the guide branch pipes 5 for spraying cooling onto the surface of the second hot roll 22 and the first hot roll 7.
[0020] Each of the four sets of first hot rolling rolls 7 has a drive toothed disc 10 installed at one end, and a drive chain 11 connects the two sets of drive toothed discs 10. By installing drive toothed discs 10 at one end of each of the four sets of first hot rolling rolls 7 and connecting the two sets of drive toothed discs 10 with drive chains 11, a synchronous transmission relationship can be formed among the multiple sets of first hot rolling rolls 7. When any set of first hot rolling rolls 7 is driven, the remaining hot rolling rolls can rotate synchronously under the linkage of the drive chain 11. This can achieve uniform clamping and conveying of hot-rolled strip steel, ensuring stable operation of the strip steel during rolling and cooling processes, and avoiding problems such as deviation, thickness deviation, or surface scratches caused by inconsistent roll speeds. The bottom of the roll adjusting frame 1 is provided with a guide groove 12, and several sets of guide grooves 13 are provided on both sides of the roll adjusting frame 1. Guide sliders 14 are respectively provided on both sides of the inner wall of the guide grooves 13. The adjustment frame 1 has a drainage channel 12 at the bottom and several sets of guide channels 13 on both sides of the frame. Guide sliders 14 are provided on both sides of the inner wall of the guide channels 13. The cooling water sprayed on the roll surface can be effectively guided back to the water-cooled circulation box 2. At the same time, it provides precise guidance support for the roll adjustment assembly 9 and the guide block 23 of the second hot roll 22, ensuring the smooth operation of the roll under high speed rotation and heat load, and realizing the efficient recovery and recycling of cooling water. Circulation pumps 15 are installed on both sides of the water-cooled circulation box 2. Limiting rings 16 are set around the inside of the water-cooled circulation box 2. Embedded slots 17 are also opened at both ends of the water-cooled circulation box 2. By installing circulation pumps 15 on both sides of the water-cooled circulation box 2, bidirectional circulation and return of cooling water can be realized, so that the cooling water can maintain a stable flow between the water-cooled circulation box 2, the circulation pipeline 4 and the guide branch pipe 5.
[0021] A filter screen plate 18 is installed on the top of the water-cooled circulation tank 2. The filter screen plate 18 is structurally matched with the limiting ring 16. Both ends of the filter screen plate 18 are connected to embedded clip plates 19. The embedded clip plates 19 and embedded slots 17 are engaged. Limiting grooves 20 are opened on both sides of the inner wall of the filter screen plate 18. A cleaning brush 21 is slidably connected between the two sets of limiting grooves 20. The cleaning brush 21 and the mesh surface of the filter screen plate 18 are in contact. Through the engaging structure between the embedded clip plates 19 and the embedded slots 17, the filter screen plate 18 with the cleaning brush 21 slidably connected inside can be securely fixed and installed at the opening of the water-cooled circulation tank 2. The cleaning brush 21 slidably connected inside the filter screen plate 18 keeps the cleaning brush 21 and the mesh surface of the filter screen plate 18 in contact. The contact fit between the surfaces allows for real-time cleaning of particles and impurities adhering to the filter screen 18. The roll adjustment assembly 9 includes a second hot roll 22, with guide blocks 23 connected to both ends of the second hot roll 22 via bearings. Positioning grooves 24 are provided on both sides of the guide blocks 23, and the positioning grooves 24 are structurally matched with the guide slider 14. The positioning grooves 24 and the guide slider 14 are in sliding fit. An adjusting screw 25 is connected to the top of the guide block 23 via a bearing, and a fixing plate 26 is threaded to the middle of the adjusting screw 25. By rotating the adjusting screw 25 connected to the top bearing of the guide block 23, the distance between the second hot roll 22 and the first hot roll 7 can be adjusted, thereby achieving precise control of the thickness of the rolled strip.
[0022] Working principle: The roll cooling device designed in this scheme mainly consists of a roll adjusting frame 1, a water-cooled circulation box 2, and a water-cooled circulation assembly 3. The water-cooled circulation box 2 is equipped with a circulation pump 15, a limit ring 16, an embedded slot 17, and a filter screen 18. One circulation pump 15 is arranged on each side. The circulation pump 15 is connected to several sets of guide branch pipes 5 through two sets of circulation conveying pipelines 4. Several sets of high-pressure nozzles 6 are equidistantly arranged on one side of the guide branch pipes 5 for spraying and cooling the surface of the second hot roll 22 and the first hot roll 7. The bottom of the roll adjusting frame 1 is equipped with four sets of first hot rolls 7. One end of two sets of first hot rolls 7 is equipped with a transmission gear 8. Three sets of roll adjusting assemblies 9 are arranged near the top of the first hot rolls 7 to realize the adjustment of the roll position and spacing.
[0023] In operation, the two circulating pumps 15 are powered on. One set of circulating pumps 15 transports the cooling water in the water-cooled circulating tank 2 to the circulating conveying pipeline 4 and the guide branch pipe 5, while the other set of circulating pumps 15 draws back the cooling water from the circulating conveying pipeline 4 and the guide branch pipe 5, forming a stable closed-loop circulation. When the high-pressure nozzle 6 on the guide branch pipe 5 is turned on, the cooling water in the guide branch pipe 5 is sprayed onto the surface of the second hot rolling roll 22 through the high-pressure nozzle 6 for cooling. At the same time, when the hot-rolled strip is processed by the second hot rolling roll 22 and the first hot rolling roll 7 and then exited, the high-pressure nozzle 6 can also spray the first hot rolling roll 7 for cooling, realizing synchronous water cooling heat dissipation of the two sets of rolls. The sprayed cooling water flows back to the water-cooled circulating tank 2 through the guide channel 12 opened at the bottom of the roll adjusting frame 1.
[0024] To ensure the cleanliness of the return water and facilitate maintenance, a filter screen plate 18 is installed at the opening of the water-cooled circulation box 2. The outer ends of the filter screen plate 18 are engaged with the embedded slots 17 at both ends of the water-cooled circulation box 2 via embedded clips 19. The filter screen plate 18 is also structurally matched with the limiting ring 16, which allows the filter assembly to be stably positioned and is easy to disassemble and maintain. Limiting grooves 20 are provided on both sides of the inner wall of the filter screen plate 18. A cleaning brush 21 is slidably connected between the two sets of limiting grooves 20. The cleaning brush 21 is in contact with the screen surface of the filter screen plate 18 to periodically or dynamically clean the particles and impurities attached to the screen surface, preventing the accumulation on the screen surface from causing poor flow or affecting the filtration effect. This effectively reduces the deposition of impurities in the system and the clogging of the high-pressure nozzle 6, improves cooling efficiency, and facilitates maintenance and replacement.
[0025] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, 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. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A roll cooling device for hot-rolled strip steel production, comprising a roll adjusting frame (1), characterized in that: A water-cooled circulation box (2) is provided at the bottom of the roll adjustment frame (1). A water-cooled circulation assembly (3) is also provided between the roll adjustment frame (1) and the water-cooled circulation box (2). The water-cooled circulation assembly (3) includes two sets of circulation conveying pipes (4). Several sets of guide branches (5) are connected between the two sets of circulation conveying pipes (4). Several sets of high-pressure nozzles (6) are also distributed at equal intervals on one side of the guide branches (5). The bottom of the roll adjustment frame (1) is provided with four sets of first hot rolls (7), and a transmission gear plate (8) is installed at one end of each of the two sets of first hot rolls (7). The top of the roll adjustment frame (1) near the first hot rolls (7) is also provided with three sets of roll adjustment components (9).
2. The roll cooling device for hot-rolled strip steel production according to claim 1, characterized in that: Each of the four sets of the first hot rolling rolls (7) is equipped with a drive toothed disc (10) at one end, and a drive chain (11) is connected between the two sets of drive toothed discs (10).
3. A roll cooling device for hot-rolled strip steel production according to claim 2, characterized in that: The bottom of the roll adjusting frame (1) is provided with a guide groove (12), and several sets of guide grooves (13) are provided on both sides of the roll adjusting frame (1). Guide sliders (14) are respectively provided on both sides of the inner wall of the guide groove (13).
4. A roll cooling device for hot-rolled strip steel production according to claim 3, characterized in that: The water-cooled circulation box (2) is equipped with circulation pumps (15) on both sides. Limiting rings (16) are provided around the inside of the water-cooled circulation box (2). Embedded slots (17) are also provided at both ends of the water-cooled circulation box (2).
5. A roll cooling device for hot-rolled strip steel production according to claim 4, characterized in that: The top of the water-cooled circulation box (2) is equipped with a filter screen plate (18). The filter screen plate (18) is matched with the structure of the limiting ring (16). Both ends of the filter screen plate (18) are connected to embedded card plates (19). The embedded card plates (19) and the embedded card grooves (17) are in a snap-fit fit. Limiting sliding grooves (20) are opened on both sides of the inner wall of the filter screen plate (18). A cleaning brush (21) is also slidably connected between the two sets of limiting sliding grooves (20). The cleaning brush (21) and the mesh surface of the filter screen plate (18) are in contact fit.
6. A roll cooling device for hot-rolled strip steel production according to claim 5, characterized in that: The roll adjustment assembly (9) includes a second hot roll (22), both ends of which are connected to guide blocks (23) via bearings. Both sides of the guide blocks (23) are provided with positioning grooves (24). The positioning grooves (24) are structurally matched with the guide sliders (14). The positioning grooves (24) and the guide sliders (14) are in sliding fit. The top of the guide blocks (23) is connected to an adjusting screw (25) via bearings. The middle part of the adjusting screw (25) is also threadedly connected to a fixing plate (26).