Cooling device based on four-high mill
By directly cooling the roll surface through the spray section and telescopic rod structure, combined with solenoid valves and a circulation system, the problem of low cooling efficiency in existing four-high rolling mills has been solved, achieving efficient cooling and recycling of the roll surface, and improving roll life and steel strip quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YONGXIN PRECISION MATERIAL WUXI
- Filing Date
- 2025-05-07
- Publication Date
- 2026-05-15
AI Technical Summary
The existing cooling methods of four-roll mills cannot effectively improve the cooling efficiency and effect of the roll surface. In particular, the water cooling inside the roll cannot directly act on the roll surface, which affects the service life of the roll and the quality of the steel strip.
It adopts a spray section and telescopic rod structure, which sprays coolant directly onto the surface of the work roller and support roller. The flow rate and angle are adjusted by solenoid valves and telescopic rods. Combined with two rows of spray sections, it cools from both sides to achieve precise cooling. It is also equipped with a filter and condenser to recycle the coolant.
It improves the cooling efficiency and effect of the roll surface, ensures the coolant is pure and at a suitable temperature, extends the roll service life, and improves the quality of steel strip.
Smart Images
Figure CN224237889U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cold rolling technology of steel strip, and in particular to a cooling and temperature reduction device based on a four-roll mill. Background Technology
[0002] A four-high rolling mill is a widely used rolling equipment in the field of metal rolling. Its core structure consists of a roll system composed of two pairs of rolls, one above the other. The plastic deformation of the metal material is achieved through the coordinated movement of the roll system. The specific layout of a four-high rolling mill is as follows: two work rolls and two support rolls. The work rolls have a smaller diameter and are in direct contact with the metal material. They are responsible for applying the rolling force and controlling the material deformation. The support rolls have a larger diameter and are located on the upper and lower sides of the work rolls. Their main function is to support the work rolls, reduce their bending deformation, and improve the rolling accuracy. When a four-high rolling mill is in operation (e.g., cold-rolled steel strip), 90% of the energy is converted into heat, causing the temperature of the work rolls and support rolls to rise. Therefore, the rolls must be cooled during the operation of a four-high rolling mill to prevent the surface temperature of the rolls (i.e., work rolls and support rolls) from being too high and the hardness of the quenched layer from decreasing, which would affect the service life of the rolls (i.e., because these rolls are expensive, if they are not cooled in time, they will be damaged and their service life will be affected), as well as the surface quality, rolling morphology, and strip shape of the steel strip. For this reason, we urgently need a cooling device based on a four-high rolling mill.
[0003] Currently, the cooling method for four-roll mills is to cool the rolls by circulating water inside the rolls. However, this method cannot directly apply the cooling water to the surface of the rolls, which will affect the cooling efficiency and cooling effect of the rolls. Utility Model Content
[0004] In view of the shortcomings of the existing production technology, the applicant provides a cooling and heat-reducing device based on a four-roll mill. By improving the structure of the cooling and heat-reducing device for the four-roll mill, the cooling and heat-reducing efficiency and effect of the roll surface of the four-roll mill can be improved.
[0005] The technical solution adopted in this utility model is as follows:
[0006] A cooling and heat dissipation device based on a four-roll mill includes: multiple spray sections and multiple telescopic rods. The spray end of each spray section faces the work roll or support roll, and the inlet end of each spray section is connected to a liquid storage tank through a solenoid valve, and is used to spray the coolant in the liquid storage tank to act on the surface of the work roll or support roll to cool and dissipate the surface of the work roll or support roll. Each spray section is equipped with two telescopic rods, and the two telescopic rods are respectively located at both ends of the spray section. The telescopic ends of the telescopic rods are hinged to the spray section, and the telescopic rods are connected to the mill frame.
[0007] Therefore, compared to the existing method of internal water cooling of the rolls, the cooling method of directly applying coolant to the surface of the work rolls or support rolls via the spray nozzle is simple in structure and easy to operate. It can directly apply coolant to the surface of the work rolls or support rolls to improve the cooling efficiency and effect of the four-high mill rolls. In addition, the flow rate of the coolant sprayed by the spray nozzle can be adjusted by the solenoid valve, and the spray angle of the spray nozzle can be adjusted by the telescopic rod. This allows the spray flow rate and spray angle of the coolant to be dynamically adjusted according to the temperature distribution of different areas on the surface of the work rolls or support rolls, so as to achieve precise cooling of the surface of the work rolls or support rolls.
[0008] As a further improvement to the above technical solution: the plurality of spray sections are arranged in two rows, and the two rows of spray sections are arranged opposite to each other. Thus, by using the two rows of spray sections to cool the work roll or support roll from both sides, the cooling efficiency and cooling effect of the four-high mill roll surface are further improved.
[0009] As a further improvement to the above technical solution: the spraying part is provided with a support plate, and the telescopic end of the telescopic rod is hinged to the support plate. Thus, the support plate can support the spraying part.
[0010] As a further improvement to the above technical solution: each of the spraying sections includes multiple nozzles, and the multiple nozzles are evenly distributed along the axial direction of the work roll or support roll, with the spraying ends of the nozzles facing the work roll or support roll. Thus, the multiple nozzles can cool multiple areas on the surface of the work roll or support roll, ensuring that the work roll or support roll is adequately cooled.
[0011] As a further improvement to the above technical solution, it also includes: a base, which is installed at the bottom of the frame.
[0012] As a further improvement to the above technical solution, it also includes: an inlet pipe and an inlet pump, wherein the two ends of the inlet pipe are respectively connected to the inlet end of the nozzle and the outlet end of the storage tank, and the inlet pump is connected to the frame.
[0013] As a further improvement to the above technical solution, it also includes: multiple inlet branch pipes, the inlet end of which is connected to the outlet end of the liquid storage tank, the outlet end of which is connected to the inlet end of the liquid pump, the inlet end of each inlet branch pipe is connected to the outlet end of the liquid pump, and the outlet end of each inlet branch pipe is connected to the inlet end of the support plate; the solenoid valve is installed on the inlet branch pipe; the number of inlet branch pipes, the number of solenoid valves, and the number of support plates are all equal to the number of nozzles. Thus, when the liquid pump is started and the solenoid valve is opened, the coolant in the liquid storage tank flows into the inlet branch pipe through the inlet pipe and is sprayed out through the nozzle, acting on the surface of the work roller or support roller to achieve cooling of the work roller or support roller.
[0014] As a further improvement to the above technical solution, it also includes a return pipe and a return pump. The two ends of the return pipe are connected to the base and the inlet of the liquid storage tank, respectively. The return pump is installed on the return pipe and connected to the frame. Thus, when the return pump is started, the coolant sprayed onto the surface of the work roller or support roller flows back into the base under gravity, and then, under the action of the return pipe, finally flows back into the liquid storage tank, thereby achieving the recycling of the coolant.
[0015] As a further improvement to the above technical solution, it also includes a filter, which is located between the base and the return pump, installed on the return pipe, and connected to the frame. Thus, the filter can remove impurities from the coolant after cooling treatment, preventing the coolant returning to the storage tank from carrying impurities and affecting the subsequent cooling treatment of the work rollers or support rollers.
[0016] As a further improvement to the above technical solution, it also includes: a condenser, which is located between the return pump and the frame, the condenser is installed on the return pipe, and the condenser is connected to the frame. Thus, the condenser can cool the coolant returning to the storage tank, ensuring that the coolant returning to the storage tank remains at a low temperature, facilitating subsequent cooling of the work rollers or support rollers.
[0017] The beneficial effects of this utility model are as follows:
[0018] This cooling method, which involves directly applying coolant to the surface of the work roll or support roll via a spray nozzle, offers a simpler and easier-to-operate structure compared to existing internal water cooling methods. It directly applies coolant to the surface of the work roll or support roll, improving the cooling efficiency and effectiveness of the four-high mill rolls. Furthermore, the flow rate of the coolant sprayed by the spray nozzle can be adjusted via a solenoid valve, and the spray angle can be adjusted via a telescopic rod. This allows for dynamic adjustment of the spray flow rate and angle based on the temperature distribution across different areas of the work roll or support roll surface, achieving precise cooling.
[0019] This utility model also has the following advantages:
[0020] 1. This utility model uses two rows of spray sections to cool the working roll or support roll from both sides, thereby further improving the cooling efficiency and effect of the rolling mill roll surface.
[0021] 2. This utility model can remove impurities from the coolant after cooling treatment through a filter, so as to avoid the coolant returning to the storage tank containing impurities, which would affect the subsequent cooling treatment of the work roller or support roller.
[0022] 3. This utility model uses a condenser to cool the coolant flowing back into the storage tank, ensuring that the coolant flowing back into the storage tank remains at a low temperature, so as to facilitate the subsequent cooling of the working roller or support roller. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the cooling and temperature reduction device based on a four-roll mill according to the present invention.
[0024] Figure 2 This is a left view of the cooling and temperature reduction device based on a four-roll mill according to the present invention;
[0025] Figure 3 This is a schematic diagram of the installation of the spray section and the liquid storage tank of this utility model;
[0026] Figure 4 This is a schematic diagram of the structure of the spray section of this utility model with oriented mounting;
[0027] Figure 5 This is a schematic diagram of the structure of the spraying part of this utility model installed along the axial direction of the support roller.
[0028] Among them: 1. Spray section;
[0029] 101. Support plate; 102. Nozzle;
[0030] 2. Solenoid valve;
[0031] 3. Liquid storage tank;
[0032] 4. Telescopic pole;
[0033] 5. Rack;
[0034] 6. Base;
[0035] 7. Liquid inlet pipe;
[0036] 8. Inlet pump;
[0037] 9. Inlet branch pipe;
[0038] 10. Return pipe;
[0039] 11. Reflux pump;
[0040] 12. Filter;
[0041] 13. Condenser. Detailed Implementation
[0042] The specific embodiments of this utility model are described below with reference to the accompanying drawings.
[0043] like Figures 1 to 5 The diagram shows the preferred embodiment of this utility model. The cooling and heat-reducing device based on a four-roll mill in this embodiment includes: multiple spray sections 1 and multiple telescopic rods 4. The spray end of each spray section 1 faces the work roll or support roll, and the inlet end of the spray section 1 is connected to the liquid storage tank 3 through a solenoid valve 2, and is used to spray the coolant in the liquid storage tank 3 to act on the surface of the work roll or support roll to cool and reduce the surface of the work roll or support roll. Each spray section 1 is equipped with two telescopic rods 4, and the two telescopic rods 4 are located at both ends of the spray section 1. The telescopic ends of the telescopic rods 4 are hinged to the spray section 1, and the telescopic rods 4 are connected to the frame 5. Therefore, the cooling method of directly applying coolant to the surface of the work roll or support roll by spraying coolant through the spray unit 1 is simpler in structure and easier to operate than the existing internal water cooling method of the roll. It can directly apply coolant to the surface of the work roll or support roll to improve the cooling efficiency and effect of the four-high mill rolls (i.e., work rolls and support rolls). In addition, the flow rate of coolant sprayed by the spray unit 1 can be adjusted by the solenoid valve 2, and the spray angle of the spray unit 1 can be adjusted by the telescopic rod 4. This allows the spray flow rate and spray angle of the coolant in the spray unit 1 to be dynamically adjusted according to the temperature distribution of different areas on the surface of the work roll or support roll, so as to achieve precise cooling of the surface of the work roll or support roll.
[0044] In other words, from top to bottom, the two telescopic rods 4 of the spray unit 1 are denoted as telescopic rod A 4 and telescopic rod B 4 respectively. If the extension and retraction of telescopic rod A 4 is consistent with the extension and retraction of telescopic rod B 4, then the spray unit 1 sprays horizontally. If telescopic rod A 4 extends and telescopic rod B 4 shortens, then the spray unit 1 sprays downward at an angle. If telescopic rod A 4 shortens and telescopic rod B 4 extends, then the spray unit 1 sprays upward at an angle.
[0045] In other words, during the operation of a four-roll mill, the heat generated during operation is directly transferred to the work roll and indirectly transferred to the support roll. Therefore, the surface of the work roll has higher heat and the surface of the support roll has lower heat. By adjusting the spray flow rate and spray angle of the coolant in the spray area 1 of the work roll and support roll, precise cooling of the surface of the work roll or support roll can be achieved. If the cooling effect of the spray area 1 acting on the surface of the work roll and support roll is the same, it will affect the cooling effect of the work roll and support roll.
[0046] In this embodiment, multiple spray sections 1 are arranged in two rows, with the two rows of spray sections 1 facing each other. Thus, the two rows of spray sections 1 cool the work roll or support roll from both sides, thereby further improving the cooling efficiency and effect on the surface of the four-high mill rolls.
[0047] In this embodiment, the spraying section 1 is provided with a support plate 101, and the telescopic end of the telescopic rod 4 is hinged to the support plate 101. Each spraying section 1 includes a plurality of nozzles 102, and the plurality of nozzles 102 are evenly distributed along the axial direction of the working roller or the support roller, with the spraying end of the nozzle 102 facing the working roller or the support roller. Thus, the support plate 101 can support the spraying section 1.
[0048] In this embodiment, it also includes a base 6, which is mounted to the bottom of the frame 5.
[0049] In this embodiment, the system also includes: an inlet pipe 7, an inlet pump 8, and multiple inlet branch pipes 9. The inlet pump 8 is connected to the frame 5. The inlet end of the inlet pipe 7 is connected to the outlet end of the storage tank 3, and the outlet end of the inlet pipe 7 is connected to the inlet end of the inlet pump 8. The inlet end of the inlet branch pipe 9 is connected to the outlet end of the inlet pump 8, and the outlet end of the inlet branch pipe 9 is connected to the inlet end of the support plate 101. A solenoid valve 2 is installed on the inlet branch pipe 9. The number of inlet branch pipes 9, the number of solenoid valves 2, and the number of support plates 101 are all equal to the number of nozzles 102. Thus, when the inlet pump 8 is started and the solenoid valve 2 is opened, the coolant in the storage tank 3 flows into the inlet branch pipe 9 through the inlet pipe 7 and is sprayed out through the nozzles 102, acting on the surface of the work roller or support roller to achieve cooling treatment of the work roller or support roller.
[0050] In this embodiment, the system also includes: a reflux pipe 10, a reflux pump 11, a filter 12, and a condenser 13. The two ends of the reflux pipe 10 are connected to the inlet ends of the base 6 and the liquid storage tank 3, respectively. The reflux pump 11 is installed on the reflux pipe 10 and is connected to the frame 5. The filter 12 is located between the base 6 and the reflux pump 11, and is installed on the reflux pipe 10 and connected to the frame 5. The condenser 13 is located between the reflux pump 11 and the frame 5, and is installed on the reflux pipe 10 and connected to the frame 5. Therefore, the return pump 11 is started, and the coolant sprayed onto the surface of the work roll or support roll flows back into the base 6 under the action of gravity, and finally flows back into the storage tank 3 under the action of the return pipe 10, so as to realize the recycling of coolant. The filter 12 can remove impurities in the coolant after cooling treatment to avoid the coolant returning to the storage tank 3 carrying impurities, thereby affecting the subsequent cooling treatment of the work roll or support roll. The condenser 13 can cool the coolant returning to the storage tank 3 to ensure that the coolant returning to the storage tank 3 is still at a low temperature, so as to facilitate the subsequent cooling treatment of the work roll or support roll.
[0051] In other words, the temperature of the coolant will rise after cooling treatment. If it is not cooled by condenser 13, the temperature of the coolant flowing back into the storage tank 3 will be too high to be recycled. Therefore, the coolant flowing back into the storage tank 3 needs to be cooled to facilitate the subsequent cooling treatment of the work roller and support roller.
[0052] For example: Filter 12 is a precision plate filter 12.
[0053] The cooling process of this utility model four-roll mill is as follows (from top to bottom, the two working rolls of the four-roll mill are labeled as working roll A and working roll B, and the two support rolls are labeled as support roll A and support roll B): First, depending on whether the roll requiring cooling is a working roll or a support roll, the spray flow rate of the coolant sprayed from the nozzle 102 is determined (the spray flow rate of nozzle 102 for working roll A is Q1, the spray flow rate of nozzle 102 for working roll B is Q2, the spray flow rate of nozzle 102 for support roll A is Q3, and the spray flow rate of nozzle 102 for support roll B is Q4, Q1 > Q2 > Q3 > Q4. Since working roll A is located above working roll B, Q1 > Q2. Since support roll A is located above support roll B... Above, Q3 > Q4. Since the heat of the working roller is greater than that of the support roller, Q2 > Q3. Adjust the spray angle accordingly. Finally, start the inlet pump 8, return pump 11, filter 12, and condenser 13, and open the solenoid valve 2. The coolant in the storage tank 3 passes through the inlet pipe 7 and the inlet branch pipe 9 in sequence, and is sprayed onto the surface of the working roller and the support roller through the nozzle 102 to cool them down. Under the action of gravity, the coolant flows into the base 6 and returns to the storage tank 3 through the return pipe 10 (the return coolant is filtered by the filter 12 and cooled by the condenser 13) for recycling.
[0054] In summary, this invention utilizes a cooling method where the coolant is sprayed directly onto the surface of the work roll or support roll by the spraying section 1. Compared to existing methods of internal water cooling in rolls, this method is simpler in structure and easier to operate. It can directly apply the coolant to the surface of the work roll or support roll, thereby improving the cooling efficiency and effect of the four-high mill roll surface. Furthermore, the flow rate of the coolant sprayed by the spraying section 1 can be adjusted by the solenoid valve 2, and the spraying angle of the spraying section 1 can be adjusted by the telescopic rod 4. This allows the spraying flow rate and spraying angle of the coolant in the spraying section 1 to be dynamically adjusted according to the temperature distribution in different areas of the work roll or support roll surface, thus achieving precise cooling of the work roll or support roll surface.
[0055] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.
Claims
1. A cooling and temperature reduction device based on a four-roll mill, characterized in that, include: Multiple spray sections (1), each of which has its spray end facing the work roller or support roller, and the inlet end of the spray section (1) is connected to the liquid storage tank (3) through a solenoid valve (2), and is used to spray the coolant in the liquid storage tank (3) to act on the surface of the work roller or support roller to cool the surface of the work roller or support roller. Multiple telescopic rods (4), each of the spraying parts (1) is equipped with two of the telescopic rods (4), and the two telescopic rods (4) are respectively located at both ends of the spraying part (1). The telescopic ends of the telescopic rods (4) are hinged to the spraying part (1), and the telescopic rods (4) are connected to the frame (5).
2. The cooling and temperature reduction device based on a four-roll mill as described in claim 1, characterized in that: The plurality of the spray sections (1) are arranged in two columns, and the two columns of spray sections (1) are arranged opposite to each other.
3. The cooling and temperature reduction device based on a four-roll mill as described in claim 1, characterized in that: The spray section (1) is provided with a support plate (101), and the telescopic end of the telescopic rod (4) is hinged to the support plate (101).
4. The cooling and temperature reduction device based on a four-roll mill as described in claim 3, characterized in that: Each of the aforementioned injection sections (1) includes: Multiple nozzles (102) are distributed at equal intervals along the axial direction of the work roll or support roll, and the spraying end of the nozzles (102) faces the work roll or support roll.
5. The cooling and temperature reduction device based on a four-roll mill as described in claim 4, characterized in that: Also includes: The base (6) is mounted to the bottom of the frame (5).
6. The cooling and temperature reduction device based on a four-roll mill as described in claim 4, characterized in that: Also includes: The liquid inlet pipe (7) and the liquid inlet pump (8) are connected at both ends to the inlet end of the nozzle (102) and the outlet end of the liquid storage tank (3), respectively, and the liquid inlet pump (8) is connected to the frame (5).
7. The cooling and temperature reduction device based on a four-roll mill as described in claim 6, characterized in that: Also includes: Multiple inlet branch pipes (9), the inlet end of the inlet pipe (7) is connected to the outlet end of the liquid storage tank (3), the outlet end of the inlet pipe (7) is connected to the inlet end of the liquid pump (8), the inlet end of the inlet branch pipe (9) is connected to the outlet end of the liquid pump (8), the outlet end of the inlet branch pipe (9) is connected to the inlet end of the support plate (101), and the solenoid valve (2) is installed on the inlet branch pipe (9); The number of inlet branch pipes (9), the number of solenoid valves (2), and the number of support plates (101) are all equal to the number of nozzles (102).
8. The cooling and temperature reduction device based on a four-roll mill as described in claim 5, characterized in that: Also includes: The return pipe (10) and the return pump (11) are connected at both ends to the base (6) and the inlet of the liquid storage tank (3), respectively. The return pump (11) is installed on the return pipe (10) and is connected to the frame (5).
9. The cooling and temperature reduction device based on a four-roll mill as described in claim 8, characterized in that: Also includes: A filter (12) is located between the base (6) and the return pump (11). The filter (12) is installed on the return pipe (10) and is connected to the frame (5).
10. The cooling and temperature reduction device based on a four-roll mill as described in claim 8, characterized in that: Also includes: A condenser (13) is located between the reflux pump (11) and the frame (5). The condenser (13) is mounted on the reflux pipe (10) and is connected to the frame (5).