A water-cooled and air-cooled combined device for a two-roll hot rolling mill

Abstract

This invention discloses a water-cooled and air-cooled composite device for a two-roll hot rolling mill, belonging to the field of metal pressure processing and manufacturing. The device includes an upper roll assembly with a lower roll assembly at its bottom. The upper and lower roll assemblies are used in conjunction. The upper roll assembly includes an upper roll, with an upper roll cooling box fixedly connected to it. An upper roll cooling component is fixedly installed on the upper roll cooling box. An internal water cooling component is located on the roll body and on one side of the upper roll cooling box. An upper roll cooling water inlet is located on the upper roll cooling box and on top of the upper roll cooling component. A water inlet diversion plate is fixedly installed at the upper roll cooling water inlet. An upper roll cooling air inlet is opened on the side of the upper roll cooling box. By using the water-cooled and air-cooled composite device, the cooling effect of the roll can be significantly improved, thereby extending the service life of the roll and facilitating its use by operators.

Description

Technical Field

[0001] This invention relates to the field of metal pressure processing and manufacturing, and more specifically, to a water-cooled and air-cooled composite device for a two-roll hot rolling mill. Background Technology

[0002] Currently, the internal and external water cooling devices of two-roll hot rolling mills generally use external water cooling spray in conjunction with internal water cooling rolls. The internal water cooling technology has been basically matured thanks to the efforts of many scientific and technical personnel. However, the external water cooling spray method for cooling the roll surface has not been well developed and broken through. In particular, most processed products cannot allow water droplets to fall on the product, so most external water cooling, especially the external water cooling of the upper roll, has been abandoned or even dismantled. After the external water cooling of the upper roll is dismantled, the external water cooling of the lower roll cannot be synchronized due to the replacement of the upper and lower rolls. As a result, the installation of external water cooling of rolls has become a dispensable but useless feature in the two-roll hot rolling industry.

[0003] Existing air-cooling technology for the outer surface of rolling mill rolls involves spraying liquid nitrogen onto the roll surface. However, the sudden cooling of the roll surface by liquid nitrogen can cause thermal fatigue of the metal surface, potentially leading to surface cracking and failure, and also significantly reducing the surface hardness. Other air-cooling technologies exist, such as forced air cooling of the roll surface, but their cooling effect is limited and they create harsh working conditions. Summary of the Invention

[0004] 1. Technical problems to be solved To address the problems existing in the prior art, the purpose of this invention is to provide a water-cooled and air-cooled composite device for a two-roll hot rolling mill. By adopting the water-cooled and air-cooled composite device, the cooling effect of the equipment can be significantly improved, thereby helping to extend the service life of the equipment and making it more convenient for workers to use.

[0005] 2. Technical Solution To solve the above problems, the present invention adopts the following technical solution.

[0006] A water-cooled and air-cooled combined device for a two-roll hot rolling mill includes an upper roll assembly, with a lower roll assembly located at the bottom of the upper roll assembly. The upper and lower roll assemblies are used in conjunction. The upper roll assembly includes an upper roll, and an upper roll cooling box is fixedly connected to the upper roll. An upper roll cooling component is fixedly installed on the upper roll cooling box. An internal water-cooling component for the upper roll cooling box is located on the roll body and on one side of the upper roll cooling box. An upper roll cooling water inlet is located on the upper roll cooling box and at the top of the upper roll cooling component. An inlet water diversion plate is fixedly installed at the upper roller cooling water inlet. An upper roller cooling air inlet is opened on the side of the upper roller cooling box. Sealing ring placement areas are provided on the front and back of the upper roller cooling box. A sandpaper block is fixedly installed at the bottom of the upper roller cooling box by bolts. An auxiliary spring for installing the sandpaper block is sleeved on the bolts. An upper roller cooling exhaust port is opened on the upper roller cooling box and at the bottom of the upper roller cooling component. An upper roller steam outlet is opened inside the upper roller cooling box and at the end away from the upper roller cooling exhaust port.

[0007] Furthermore, the rolled product is mounted on the upper roller.

[0008] Furthermore, the sealing ring placement area is sealed to the outer surface of the upper roller by means of the sealing ring. Furthermore, the lower roll assembly includes a lower roll, a lower roll cooling box is sleeved on the outside of the lower roll, and a lower roll drain outlet is provided on one side of the lower roll cooling box.

[0009] Furthermore, an internal water-cooling component for the lower roll is provided on the outer side of the lower roll and on one side of the lower roll cooling box.

[0010] Furthermore, the lower roller cooling box is provided with a lower roller steam outlet and a lower roller cold air inlet on both sides.

[0011] Furthermore, a filter cotton is provided at the water inlet of the lower roller cooling box, and a second water inlet diversion plate is provided at the water inlet of the lower roller cooling box and on one side of the filter cotton.

[0012] Furthermore, both the lower and upper rolls are equipped with bearings for auxiliary equipment operation, and the bearings are provided with bearing housing covers.

[0013] Furthermore, the filter cotton includes a bottom filter plate, the top of which is fixedly connected to a connecting plate by a connecting spring, and a cylinder is fixedly connected inside the connecting plate. The bottom filter plate has through holes that are adapted to the cylinder.

[0014] Furthermore, the cylinder has an internal telescopic groove, and a counterweight is fixedly connected inside the telescopic groove by a telescopic spring. An activated carbon adsorption ball is rotatably connected inside the counterweight.

[0015] 3. Beneficial Effects Compared with the prior art, the advantages of this invention are: This invention employs a water-cooled and air-cooled composite device for the upper roll. It features an upper roll cooling air inlet and an upper roll cooling exhaust outlet. The upper roll cooling air inlet has a gas pressure of 0.1 MPa, while the upper roll cooling exhaust outlet uses negative pressure at 0.05 MPa. Water cooling is achieved through the upper roll cooling water inlet and the lower roll drain outlet. Furthermore, a special material sandpaper block water-distributing element, combined with the clamping action of an auxiliary spring, provides a grinding and cleaning effect on the roll surface, resulting in a surface roughness that increases with use. After water flows out from the upper roll, a filter cotton is installed at the lower roll to prevent wastewater from contaminating the lower roll surface during the cooling process. At the bottom of the lower roll cooling tank, the invention includes a lower roll drain outlet to discharge excess water into a circulating water tank, thereby improving the cooling effect of the equipment and facilitating its long-term use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention; Figure 2 for Figure 1 The diagram shows the structure of the upper roll assembly. Figure 3 for Figure 2 The diagram shows a partial structure. Figure 4 for Figure 1 The diagram shows the structure of the lower roll assembly. Figure 5 This is a schematic diagram of the structure of the second embodiment of the present invention; Figure 6 for Figure 5 A three-dimensional diagram of the local structure is shown.

[0017] Explanation of the labels in the diagram: 1. Upper roll assembly; 11. Upper roll; 12. Upper roll cooling box; 13. Upper roll cooling internal water cooling component; 14. Upper roll cooling water inlet; 15. Upper roll cooling air inlet; 16. Rolled product; 17. Sealing ring placement area; 18. Inlet water diversion plate one; 19. Sandpaper block; 110. Bolt; 111. Upper roll cooling exhaust port; 112. Upper roll steam outlet; 2. Lower roll assembly; 21. Lower roll; 22. Lower roll cooling box; 23. Lower roll drain outlet; 24. Lower roll internal water cooling components; 25. Lower roll steam outlet; 26. Lower roll cold air inlet; 27. Filter cotton; 271. Bottom filter plate; 272. Connecting spring; 273. Connecting plate; 274. Cylindrical section; 275. Telescopic groove; 276. Telescopic spring; 277. Counterweight; 278. Activated carbon adsorption ball; 28. Inlet water diversion plate II; 3. Bearings; 4. Bearing housing cover. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] Example 1: Please see Figure 1-4A water-cooled and air-cooled composite device for a two-roll hot rolling mill includes an upper roll assembly 1 and a lower roll assembly 2 located at the bottom of the upper roll assembly 1. The upper roll assembly 1 and the lower roll assembly 2 are used in conjunction. During operation, the water and air pressure of the upper roll assembly 1 and the lower roll assembly 2 must be closely monitored, and adjustments made promptly. Contact between the water flow and the rolled workpiece is strictly prohibited, as this could cause unnecessary "quenching" of the product and affect product quality. Furthermore, when the mill is stopped for roll replacement, it is crucial to promptly disconnect the cooling system connecting pipes to prevent damage to the cooling system. The upper roll assembly 1 includes an upper roll 11, with an upper roll cooling box 12 fixedly connected to the upper roll 11. Upper roll cooling components are fixedly installed on the upper roll cooling box 12. An upper roll cooling inner [component] is located on the roll body 11 and on one side of the upper roll cooling box 12. The water-cooled component 13 has an upper roller cooling water inlet 14 on the upper roller cooling box 12 and located at the top of the upper roller cooling component. An inlet water diversion plate 18 is fixedly installed at the upper roller cooling water inlet 14. An upper roller cooling air inlet 15 is opened on the side of the upper roller cooling box 12. The gas pressure of the upper roller cooling air inlet 15 is 0.1MPa. Sealing ring placement places 17 are provided on the front and back of the upper roller cooling box 12. A sandpaper block 19 is fixedly installed at the bottom of the upper roller cooling box 12 by bolts 110. An auxiliary spring for installing the sandpaper block 19 is sleeved on the bolts 110. An upper roller cooling exhaust port 111 is opened on the upper roller cooling box 12 and located at the bottom of the upper roller cooling component. An upper roller steam outlet 112 is opened inside the upper roller cooling box 12 and at the end away from the upper roller cooling exhaust port 111.

[0022] The rolled product 16 is mounted on the upper roll 11.

[0023] The sealing ring placement 17 is sealed to the outer surface of the upper roller 11 by the sealing ring. The lower roll assembly 2 includes a lower roll 21, a lower roll cooling box 22 is sleeved on the outside of the lower roll 21, and a lower roll drain outlet 23 is provided on one side of the lower roll cooling box 22.

[0024] A water-cooling component 24 for the lower roll is provided on the outer side of the lower roll 21 and on one side of the lower roll cooling box 22.

[0025] The lower roller cooling box 22 is provided with a lower roller steam outlet 25 and a lower roller cold air inlet 26 on both sides respectively.

[0026] A filter cotton 27 is installed at the water inlet of the lower roller cooling box 22. The filter cotton 27 can filter the liquid passing through. A second inlet diversion plate 28 is installed at the water inlet of the lower roller cooling box 22 and on one side of the filter cotton 27. The second inlet diversion plate 28 can play the role of equalizing the flow of liquid, which is beneficial to the subsequent operation of the equipment.

[0027] Both the lower roll 21 and the upper roll 11 are equipped with bearings 3 for auxiliary equipment operation. The bearings 3 are equipped with bearing housing covers 4. The upper roll cooling internal water cooling component 13 and the upper roll cooling component and the lower roll cooling box 22 should be installed together with the roll bearing housing, roll and other components on the outside to keep the cooling device clean and hygienic. It is strictly forbidden for dirt to enter the upper and lower roll cooling devices. After the upper and lower rolls are installed together with the rolls into the frame, the connecting pipes should be correctly connected to the external pipes and the water pressure and air pressure should be adjusted to the specified values.

[0028] The working principle of the first embodiment of the water-cooled and air-cooled composite device for a two-roll hot rolling mill provided by the present invention is as follows: In use, water enters the interior of the upper roller cooling box 12 through the upper roller cooling inlet 14 and is evenly distributed by the inlet water diversion plate 18. When the water enters, it is mixed with the cold air from the upper roller cooling air inlet 15. Then, the air and water spread on the surface of the upper roller 11 to cool the upper roller 11. As the water and air flow downward, a large amount of water vapor will be generated when the upper roller 11 cools down. At this time, the atomized water vapor can be discharged in time through the upper roller cooling exhaust port 111. Subsequently, the spring force of the auxiliary spring on the bolt 110 can cause the sandpaper block 19 close to the surface of the upper roller 11 to be diverted to both sides. In addition to diverting the water flow, the sandpaper block 19 can also clean and grind the oxide scale and other impurities adhering to the surface of the upper roller 11, thereby maintaining the smoothness of the surface of the upper roller 11 to a certain extent. After the water flows out from the upper roller 11, a filter cotton 27 is set at the lower roller 21. The filter cotton 27 can prevent the sewage from "contaminating" the surface of the lower roller 21 during the cooling process. At the lower part of the lower roller cooling box 22, the present invention sets a lower roller drain outlet 23 to drain excess water into the circulating water tank. Since the water pressure and air pressure can be freely set through valves for water inlet and drainage, and air inlet and exhaust, the cooling problem of the outer surface of the upper roll 11 and lower roll 21 is easily solved. Combined with a relatively mature internal water cooling system, the surface hardness and surface roughness of the rolls can be maintained for a long time, thus extending the life of the rolls and ensuring the surface quality of the rolled products. The upper roll 11 of this invention adopts a water-cooled and air-cooled composite device. It is equipped with an upper roll cooling air inlet 15 and an upper roll cooling air outlet 111. The gas pressure of the upper roll cooling air inlet 15 is 0.1MPa, and the upper roll cooling air outlet 111 adopts negative pressure with a pressure value of 0.05MPa. Water cooling is achieved through the upper roll cooling water inlet 14 and the lower roll drain outlet 23. In addition, the special material sandpaper block 19 water-dividing element can also bring a grinding and cleaning effect to the roll surface due to the clamping action of the auxiliary spring. The roll surface exhibits the phenomenon that the surface roughness increases with use. The rotating lower roll 21 is always immersed in the wastewater tank discharged from the upper roll drain outlet and filtered, thereby cooling the surface of the lower roll 21.

[0029] Example 2: Please see Figure 5-6 The filter cotton 27 includes a bottom filter plate 271. A connecting plate 273 is fixedly connected to the top of the bottom filter plate 271 by a connecting spring 272. The connecting plate 273 is a porous filter plate with a larger hole diameter than the bottom filter plate 271. Through the cooperation of the connecting plate 273 and the bottom filter plate 271, multiple filtration of liquid can be achieved. A cylinder 274 is fixedly connected inside the connecting plate 273. The bottom filter plate 271 has through holes that are adapted to the cylinder 274. The number of cylinders 274 is adapted to the number of through holes.

[0030] The cylinder 274 has an internal telescopic groove 275. A counterweight 277 is fixedly connected inside the telescopic groove 275 by a telescopic spring 276. The counterweight 277 can be used to ensure the state of the activated carbon adsorption ball 278 and facilitate the later reset of the activated carbon adsorption ball 278. The activated carbon adsorption ball 278 is rotatably connected inside the counterweight 277. With the setting of the activated carbon adsorption ball 278, organic matter in the liquid can be adsorbed.

[0031] The working principle of the second embodiment of the water-cooled and air-cooled composite device for a two-roll hot rolling mill provided by the present invention is as follows: Working principle: When in use, the filter cotton 27 comes into contact with the activated carbon adsorption ball 278 through the liquid, which can adsorb organic matter in the water. The liquid can be further filtered through the connecting plate 273 and the bottom filter plate 271. When the cylinder 274 returns to its original position, the telescopic spring 276 can indirectly drive the counterweight 277 to swing left and right. The left and right swing of the counterweight 277 can indirectly drive the activated carbon adsorption ball 278 to swing left and right, thereby realizing the self-cleaning of the activated carbon adsorption ball 278. This setting can help extend the service life of the filter cotton 27 and facilitate long-term use of the equipment. This invention allows for the adsorption of organic matter in water through contact between the liquid and the activated carbon adsorption ball 278. The liquid can be further filtered through the connecting plate 273 and the bottom filter plate 271, thereby improving the filtration effect of the equipment and facilitating subsequent operations. Furthermore, the filter cotton 27 of this invention can be self-cleaned after use, which facilitates the recycling of the equipment and makes subsequent work easier.

[0032] The above are merely preferred embodiments of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. A water-cooled and air-cooled composite device for a two-roll hot rolling mill, comprising an upper roll assembly (1), characterized in that: The lower roll assembly (2) is provided at the bottom of the upper roll assembly (1). The upper roll assembly (1) and the lower roll assembly (2) are used together. The upper roll assembly (1) includes an upper roll (11). An upper roll cooling box (12) is fixedly connected to the upper roll (11). An upper roll cooling component is fixedly installed on the upper roll cooling box (12). An upper roll cooling internal water cooling component (13) is provided on the upper roll (11) and on one side of the upper roll cooling box (12). An upper roll cooling water inlet (14) is provided on the upper roll cooling box (12) and on the top of the upper roll cooling component. A water inlet is fixedly installed at the upper roll cooling water inlet (14). The upper roller cooling box (12) has an upper roller cooling air inlet (15) on its side. The upper roller cooling box (12) has a sealing ring placement place (17) on both its front and back sides. A sandpaper block (19) is fixedly installed at the bottom of the upper roller cooling box (12) by bolts (110). An auxiliary spring for installing the sandpaper block (19) is sleeved on the bolts (110). An upper roller cooling exhaust port (111) is opened on the upper roller cooling box (12) and at the bottom of the upper roller cooling component. An upper roller steam exhaust port (112) is opened inside the upper roller cooling box (12) and at the end away from the upper roller cooling exhaust port (111). The lower roll assembly (2) includes a lower roll (21), a lower roll cooling box (22) is sleeved on the outside of the lower roll (21), and a lower roll drain outlet (23) is provided on one side of the lower roll cooling box (22). A filter cotton (27) is provided at the water inlet of the lower roller cooling box (22), and a second water inlet diversion plate (28) is provided at the water inlet of the lower roller cooling box (22) and on one side of the filter cotton (27). The filter cotton (27) includes a bottom filter plate (271), and a connecting plate (273) is fixedly connected to the top of the bottom filter plate (271) by a connecting spring (272). A cylinder (274) is fixedly connected inside the connecting plate (273), and a through hole adapted to the cylinder (274) is opened inside the bottom filter plate (271). The cylinder (274) has an internal expansion groove (275), and a counterweight (277) is fixedly connected inside the expansion groove (275) by an expansion spring (276). An activated carbon adsorption ball (278) is rotatably connected inside the counterweight (277).

2. The water-cooled and air-cooled combined device for a two-roll hot rolling mill according to claim 1, characterized in that: The rolled product (16) is mounted on the upper roll (11).

3. The water-cooled and air-cooled composite device for a two-roll hot rolling mill according to claim 1, characterized in that: The sealing ring placement area (17) is sealed to the outer surface of the upper roller (11) by the sealing ring.

4. The water-cooled and air-cooled composite device for a two-roll hot rolling mill according to claim 1, characterized in that: A water-cooling component (24) is provided on the outside of the lower roll (21) and on one side of the lower roll cooling box (22).

5. The water-cooled and air-cooled composite device for a two-roll hot rolling mill according to claim 1, characterized in that: The lower roller cooling box (22) is provided with a lower roller steam outlet (25) and a lower roller cold air inlet (26) on both sides respectively.

6. The water-cooled and air-cooled composite device for a two-roll hot rolling mill according to claim 1, characterized in that: Both the lower roll (21) and the upper roll (11) are provided with bearings (3) for auxiliary equipment operation, and the bearings (3) are provided with bearing seat covers (4).

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