Aluminum alloy plate strip hot rolling device

Abstract

The utility model relates to the technical field of hot rolling mills, in particular to a hot rolling device for an aluminum alloy plate strip, which aims at solving the technical problem of overcoming the defects of large using amount of cooling liquid and difficulty in cleaning in the prior art, and is mainly realized through the following technical scheme: the hot rolling device for the aluminum alloy plate strip comprises a rack and a hot rolling assembly, the hot rolling assembly comprises a hot rolling frame, an upper hot roller and a lower hot roller and further comprises a cooling assembly and a cleaning assembly, the cooling assembly comprises a water cooling part and an air cooling part, the water cooling part comprises top water cooling and bottom water cooling, the cleaning assembly comprises a first cleaning part and a second cleaning part, and the first cleaning part corresponds to the upper hot roller. The second cleaning piece is arranged between the two adjacent lower hot rollers, the cooling assembly can accurately spray and cool to effectively reduce the using amount of cooling liquid, the cleaning assembly can conduct self-cleaning operation on the upper hot rollers and the lower hot rollers during hot rolling work, dirt residues are avoided, and the follow-up cleaning pressure is relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of hot rolling mills, in particular to an aluminum alloy plate and strip hot rolling device. Background Art

[0002] Aluminum alloy sheet and strip are widely used in various industries, including decoration, packaging, construction, transportation, electronics, aviation, aerospace, and weapons. The production of aluminum alloy sheet and strip is inseparable from the hot rolling process. During hot rolling, the aluminum alloy sheet is heated to above the recrystallization temperature, which increases the metal plasticity and reduces deformation resistance. The sheet is then rolled into a thinner shape after passing between upper and lower hot rolling rollers.

[0003] In the existing technology, when the aluminum alloy plate passes through the hot rolling roller, it is necessary to continuously spray coolant on both sides of the hot rolling roller to cool and lubricate the aluminum alloy plate, facilitate the aluminum alloy plate to enter between the two hot rolling rollers, and remove the oxides cracked on the surface of the aluminum alloy plate after rolling. Therefore, coolant is extremely important and is used in large quantities. It is easy to splash during the spraying process, affecting the internal working environment. In addition, the hot rolling roller is in contact with the coolant for a long time, which easily forms dirty residues on the surface, making it inconvenient to clean. Utility Model Content

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the prior art that the amount of coolant required is large and is difficult to clean, thereby providing an aluminum alloy plate and strip hot rolling device.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] An aluminum alloy plate and strip hot rolling device comprises a frame and a hot rolling assembly, wherein the hot rolling assembly comprises a hot rolling stand, a plurality of upper hot rolling rollers and a plurality of lower hot rolling rollers, wherein the hot rolling stand is arranged above the middle portion of the frame, and a feed port and a discharge port are provided on both sides of the hot rolling stand, wherein the upper hot rolling rollers and the lower hot rolling rollers are both positioned and rotatably mounted in the hot rolling stand, wherein the upper hot rolling rollers are arranged above the lower hot rolling rollers, and further comprises:

[0007] A cooling assembly, the cooling assembly includes a water-cooling component and an air-cooling component, the water-cooling component includes a top water-cooling component and a bottom water-cooling component, the top water-cooling component is arranged on the top side of the hot rolling stand, the bottom water-cooling component is arranged on the hot rolling stand near the feed port, the top water-cooling component is fixed on the hot rolling stand and arranged between two adjacent upper hot rolling rollers, and the air-cooling component is arranged on the hot rolling stand near the discharge port;

[0008] A cleaning assembly includes a first cleaning member arranged at the top of the hot rolling stand and a second cleaning member arranged at the bottom of the hot rolling stand. The first cleaning member is provided in plurality and both ends are positioned and rotatably installed in the hot rolling stand. The first cleaning member is provided corresponding to the upper hot rolling roller. The second cleaning member is also provided in plurality and vertically slidably arranged in the hot rolling stand. The second cleaning member is provided between two adjacent lower hot rolling rollers.

[0009] By adopting the above technical solution, when the aluminum alloy strip is rolled, the cooling component cools and lubricates the aluminum strip through the water-cooling part, ensuring that the aluminum alloy strip can smoothly enter between the upper hot rolling roller and the lower hot rolling roller, and the oxide layer on the surface of the aluminum alloy strip is removed by the air-cooling part. The coolant can be accurately sprayed and collected, effectively reducing the amount of coolant used; a cleaning component is set to perform self-cleaning operations on the upper hot rolling roller and the lower hot rolling roller during hot rolling, scrape off the coolant adhering to the surface and clean the surface impurities to avoid the formation of dirty residues and reduce the pressure of subsequent cleaning.

[0010] Furthermore, the top water cooling includes a coolant nozzle and a cooling rack. The cooling rack is arranged along the width direction of the hot rolling rack. The coolant nozzle array is arranged on the cooling rack. A baffle is also extended on the cooling rack. The baffle is arranged above the coolant nozzle. The bottom water cooling is arranged at an angle and the top end is close to the side of the lower hot rolling roller.

[0011] By adopting the above technical solution, the top water cooling is set between two adjacent upper hot rolling rollers, which can realize precise multi-point and multiple cooling of aluminum alloy plate and strip components, effectively reducing the amount of coolant used. The baffle is blocked above the coolant nozzle to reduce coolant splashing and reduce the impact on the upper hot rolling roller.

[0012] Furthermore, the first cleaning member is arranged above the upper hot rolling roller, and the first cleaning member includes a cleaning roller and a cleaning scraper arranged in a circumferential array on the cleaning roller, the cleaning scraper is clamped with the cleaning roller, and the side of the cleaning scraper away from the cleaning roller abuts against the top of the upper hot rolling roller, and the first cleaning member also includes an upper driving member, which corresponds to the cleaning roller and drives the cleaning roller to rotate.

[0013] By adopting the above technical solution, the first cleaning member is in contact with the upper hot rolling roller to scrape off the coolant adhering to the upper hot rolling roller. Multiple cleaning scrapers can move synchronously with the upper hot rolling roller, or after a cleaning scraper is used to a certain extent, the cleaning roller can be rotated to continue scraping, thereby increasing the service life.

[0014] Furthermore, a plurality of inspection openings are provided on the top of the hot rolling stand corresponding to the first cleaning member, and an inspection door is hingedly provided on the inspection opening.

[0015] By adopting the above technical solution, an inspection port is set to observe the condition of the cleaning scraper to determine whether the cleaning scraper needs to be replaced or the cleaning roller needs to be rotated, and the cleaning scraper replacement operation is performed through the inspection door.

[0016] Furthermore, the second cleaning member includes a cleaning member and a sliding member, the sliding member is arranged at both ends of the cleaning member and drives the cleaning member to slide vertically in the hot rolling stand, the cleaning member includes a cleaning roller, a grinding block and absorbent cotton, the cleaning roller is arranged along the width direction of the hot rolling stand and is connected to the sliding member at both ends, the grinding block and the absorbent cotton are arranged in a circular array on the cleaning roller, and the grinding block and the absorbent cotton are intermittently arranged.

[0017] By adopting the above technical solution, a sliding part is set to raise and lower the cleaning part as needed. When the lower hot rolling roller does not need to be cleaned, the cleaning part can be lowered, or the height of the cleaning part can be raised to control the cleaning force; the grinding block grinds off the dirt on the surface of the lower hot rolling roller, and the absorbent cotton wipes and takes away the ground impurities to avoid affecting the hot rolling process of the aluminum alloy plate and strip.

[0018] Furthermore, the sliding part includes a support frame and a sliding drive. The sliding drive controls the vertical sliding of the support frame and is arranged in the side wall of the hot rolling stand. The side wall of the hot rolling stand is provided with a sliding groove corresponding to the support frame. A receiving hole for receiving the cleaning part is provided in the support frame, and a sealing ring is also provided between the cleaning part and the support frame.

[0019] By adopting the above technical solution, the sliding drive controls the lifting of the cleaning part, the support frame fills the sliding groove and slides in the sliding groove to prevent the coolant from leaking out of the sliding groove, thereby ensuring a clean construction environment, and the sealing ring improves the sealing performance and reduces the possibility of coolant leakage.

[0020] Furthermore, shielding frames are provided on both the feed port and the discharge port, and a wiping roller is positioned and rotatably connected to the bottom of the shielding frame near the discharge port, and a liquid collecting tank is also provided at the bottom of the hot rolling frame.

[0021] By adopting the above technical solution, the shielding frame prevents the internal coolant from splashing out of the hot rolling frame and affecting the working environment. The sump collects the used coolant and scraped impurities to achieve environmental protection in the production process; the wiping roller wipes the surface of the aluminum alloy plate and strip to reduce the outflow of coolant.

[0022] Furthermore, the frame is provided with a plurality of evenly distributed conveying rollers, both ends of the conveying rollers are positioned and rotatably mounted on the frame, an insulation cover is provided above the conveying rollers on the side close to the feed port, and an abutment roller is provided above the conveying rollers on the side close to the discharge port. An abutment frame is extended upward from the side of the frame close to the discharge port, and both ends of the abutment rollers are positioned and rotatably mounted on the abutment frame.

[0023] By adopting the above technical solution, the conveying rollers can realize the conveyance of aluminum alloy plates and strips. They are first insulated by the insulation cover before entering the hot rolling assembly. After leaving the hot rolling assembly, the abutment rollers are used to reduce the vibration during transportation and improve the flatness of the aluminum alloy plates and strips.

[0024] In summary, the technical solution of the present utility model has the following advantages:

[0025] 1. The aluminum alloy plate and strip hot rolling device provided by the utility model rolls the aluminum alloy plate and strip. The cooling assembly cools and lubricates the aluminum strip through the water-cooling part to ensure that the aluminum alloy plate and strip can smoothly enter between the upper hot rolling roller and the lower hot rolling roller, and removes the oxide layer on the surface of the aluminum alloy plate and strip through the air-cooling part. The coolant can be accurately sprayed and collected, effectively reducing the amount of coolant used.

[0026] 2. The aluminum alloy plate and strip hot rolling device provided by the utility model is equipped with a cleaning component that can perform self-cleaning operations on the upper hot rolling roller and the lower hot rolling roller during hot rolling, scrape off the coolant adhering to the surface and clean the surface impurities to avoid the formation of dirty residues and reduce the subsequent cleaning pressure.

[0027] 3. The aluminum alloy plate and strip hot rolling device provided by the utility model uses conveying rollers to convey the aluminum alloy plate and strip. Before entering the hot rolling assembly, it is first insulated by an insulation cover. After leaving the hot rolling assembly, the abutment rollers are used to reduce the jumping during transportation and improve the flatness of the aluminum alloy plate and strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is a schematic diagram of the overall structure of an aluminum alloy strip hot rolling device provided in one embodiment of the present utility model;

[0030] Figure 2 This is a cross-sectional view of an aluminum alloy strip hot rolling device provided in one embodiment of the present utility model;

[0031] Figure 3 This is a schematic diagram of the partial structure of the second cleaning member provided in one embodiment of the present utility model.

[0032] Description of reference numerals:

[0033] 1. Frame; 11. Conveyor roller; 12. Insulation cover; 13. Abutment roller; 14. Abutment frame; 2. Hot rolling assembly; 21. Hot rolling frame; 211. Feed port; 212. Discharge port; 213. Inspection port; 214. Inspection door; 215. Shielding frame; 216. Wiping roller; 217. Sump; 218. Slide trough; 22. Upper hot rolling roller; 23. Lower hot rolling roller; 3. Cooling assembly; 4. Water cooling unit; 41. Top water cooling; 411. Cooling Liquid nozzle; 412, cooling rack; 413, baffle; 42, bottom water cooling; 5, air cooling part; 6, cleaning assembly; 7, first cleaning part; 71, cleaning roller; 72, cleaning scraper; 73, upper drive part; 8, second cleaning part; 81, cleaning part; 811, cleaning roller; 812, grinding block; 813, absorbent cotton; 82, sliding part; 821, support frame; 8211, receiving hole; 8212, sealing ring; 822, sliding drive. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] An aluminum alloy strip hot rolling device, such as Figure 1 、 Figure 2 and Figure 3 As shown, the hot rolling mill comprises a frame 1 and a hot rolling assembly 2, as well as a cooling assembly 3 and a cleaning assembly 6. The hot rolling assembly 2 comprises a hot rolling stand 21, a plurality of upper hot rolling rollers 22 and a plurality of lower hot rolling rollers 23. The hot rolling stand 21 is arranged above the middle of the frame 1. A feed port 211 and a discharge port 212 are provided at both ends of the hot rolling stand 21. The upper hot rolling rollers 22 and the lower hot rolling rollers 23 are both positioned and rotatably mounted in the hot rolling stand 21, with the upper hot rolling rollers 22 arranged above the lower hot rolling rollers 23. The cooling assembly 3 includes a water-cooling part 4 and an air-cooling part 5. The water-cooling part 4 includes a top water-cooling part 41 and a bottom water-cooling part 42. The top water-cooling part 41 is arranged in an array along the length direction of the hot rolling stand 21 on the top side of the hot rolling stand 21. The bottom water-cooling part 42 is arranged at the bottom of the hot rolling stand 21 near the feed port 211. The top water-cooling part 41 is fixed to the hot rolling stand 21 and is arranged between two adjacent upper hot rolling rollers 22. The air-cooling part 5 is arranged on the hot rolling stand 21 near the discharge port 212 and is arranged both above and below. The cleaning assembly 6 includes a first cleaning part 7 arranged at the top of the hot rolling stand 21 and a second cleaning part 8 arranged at the bottom of the hot rolling stand 21. There are multiple first cleaning parts 7 and both ends are positioned and rotatably installed in the hot rolling stand 21. The first cleaning parts 7 are arranged corresponding to the upper hot rolling rollers 22. There are also multiple second cleaning parts 8 and they are arranged vertically sliding in the hot rolling stand 21. The second cleaning part 8 is arranged between two adjacent lower hot rolling rollers 23.

[0036] When the aluminum alloy strip is rolled, the cooling component 3 cools and lubricates the aluminum strip through the water-cooling component 4 to ensure that the aluminum alloy strip can smoothly enter between the upper hot rolling roller 22 and the lower hot rolling roller 23, and removes the oxide layer on the surface of the aluminum alloy strip through the air-cooling component 5. The coolant can be accurately sprayed and collected, effectively reducing the amount of coolant used; the cleaning component 6 is set to perform self-cleaning operations on the upper hot rolling roller 22 and the lower hot rolling roller 23 during hot rolling, scrape off the coolant adhering to the surface and clean the surface impurities to avoid the formation of dirty residues and reduce the subsequent cleaning pressure.

[0037] like Figure 2 and Figure 3 As shown, the top water cooling system 41 includes coolant nozzles 411 and a cooling rack 412. The cooling rack 412 is arranged along the width of the hot rolling stand 21. The coolant nozzles 411 are arranged in an array on the cooling rack 412. A shielding plate 413 extends from the cooling rack 412 and is positioned above the coolant nozzles 411. The bottom water cooling system 42 is arranged at an angle, with its top end close to the side of the lower hot rolling roll 23. The top water cooling system 41 is located between two adjacent upper hot rolling rolls 22, achieving precise multi-point cooling of the aluminum alloy strip components and effectively reducing coolant usage. The shielding plate 413 blocks the coolant nozzles 411, reducing coolant splashing and reducing the impact on the upper hot rolling roll 22.

[0038] like Figure 2 and Figure 3 As shown, the first cleaning member 7 is arranged above the upper hot rolling roller 22. The first cleaning member 7 includes a cleaning roller 71 and a cleaning scraper 72 arranged in a circumferential array on the cleaning roller 71. The cleaning scraper 72 is clamped with the cleaning roller 71. The side of the cleaning scraper 72 away from the cleaning roller 71 abuts against the top of the upper hot rolling roller 22. The first cleaning member 7 also includes an upper driving member 73. The upper driving member 73 corresponds to the cleaning roller 71 and drives the cleaning roller 71 to rotate. The first cleaning member 7 abuts against the upper hot rolling roller 22 to scrape off the coolant adhering to the upper hot rolling roller 22. The multiple cleaning scrapers 72 can move synchronously with the upper hot rolling roller 22, or after one cleaning scraper 72 is used to a certain extent, the cleaning roller 71 can be rotated to continue scraping, thereby increasing the service life.

[0039] A plurality of inspection openings 213 are provided on the top of the hot rolling stand 21 corresponding to the first cleaning member 7. An inspection door 214 is hingedly provided on the inspection opening 213. The inspection opening 213 is provided to observe the condition of the cleaning blade 72 to determine whether the cleaning blade 72 needs to be replaced or the cleaning roller 71 needs to be rotated. The cleaning blade 72 can be replaced through the inspection door 214.

[0040] like Figure 2 and Figure 3As shown, the second cleaning member 8 includes a cleaning member 81 and a sliding member 82. The sliding member 82 is arranged at both ends of the cleaning member 81 and drives the cleaning member 81 to slide vertically in the hot rolling stand 21. The cleaning member 81 includes a cleaning roller 811, a grinding block 812 and a water-absorbing cotton 813. The cleaning roller 811 is arranged along the width direction of the hot rolling stand 21 and is connected to the sliding member 82 at both ends. The grinding block 812 and the water-absorbing cotton 813 are arranged in a circumferential array on the cleaning roller 811, and the grinding block 812 and the water-absorbing cotton 813 are intermittently arranged. The sliding member 82 can be set to raise and lower the cleaning member 81 as needed. When the lower hot rolling roller 23 does not need to be cleaned, the cleaning member 81 can be lowered or the height of the cleaning member 81 can be raised to control the cleaning force. The grinding block 812 grinds away the dirt on the surface of the lower hot rolling roller 23, and the water-absorbing cotton 813 wipes and takes away the ground impurities to avoid affecting the hot rolling process of the aluminum alloy plate and strip.

[0041] The sliding member 82 includes a support frame 821 and a sliding drive 822. The sliding drive 822 controls the vertical sliding of the support frame 821 and is set in the side wall of the hot rolling stand 21. The side wall of the hot rolling stand 21 is provided with a sliding groove 218 corresponding to the support frame 821. The support frame 821 is provided with a receiving hole 8211 for receiving the cleaning member 81. A sealing ring 8212 is also provided between the cleaning member 81 and the support frame 821. The sliding drive 822 controls the lifting and lowering of the cleaning member 81. The support frame 821 fills the sliding groove 218 and slides in the sliding groove 218 to prevent the coolant from leaking out of the sliding groove 218, thereby ensuring a clean construction environment. The sealing ring 8212 improves the sealing performance and reduces the possibility of coolant leakage. The sliding member 82 can periodically raise the cleaning member 81 to clean the surface of the lower hot rolling roller 23.

[0042] like Figure 1 、 Figure 2 and Figure 3 As shown, shielding frames 215 are installed at both the feed port 211 and the discharge port 212. A wiping roller 216 is rotatably connected to the bottom of the shielding frame 215 near the discharge port 212. A liquid collecting trough 217 is also provided at the bottom of the hot rolling stand 21. The shielding frames 215 prevent internal coolant from splashing out of the hot rolling stand 21 and affecting the working environment. The liquid collecting trough 217 collects used coolant and scraped impurities, ensuring environmental protection during the production process. The wiping roller 216 wipes the surface of the aluminum alloy strip to reduce coolant outflow.

[0043] The frame 1 is also equipped with a plurality of evenly distributed conveyor rollers 11, which are arranged at the left and right ends of the frame 1. The ends of the conveyor rollers 11 are fixed and rotatably mounted on the frame 1. A heat preservation cover 12 is provided above the conveyor rollers 11 on the side close to the feed port 211, and abutment rollers 13 are provided above the conveyor rollers 11 on the side close to the discharge port 212. The abutment rollers 13 are arranged along the width of the frame 1. Abutment frames 14 extend from the frame 1 corresponding to the abutment rollers 13. The ends of the abutment rollers 13 are fixed and rotatably mounted on the abutment frames 14. The conveyor rollers 11 convey the aluminum alloy strip. Before entering the hot rolling assembly 2, the strip is first insulated by the heat preservation cover 12. After leaving the hot rolling assembly 2, the strip is contacted by the abutment rollers 13 to reduce vibration during transportation and improve the flatness of the aluminum alloy strip.

[0044] The working principle and use method of the present aluminum alloy plate and strip hot rolling device: When the aluminum alloy plate and strip are rolled, the plate and strip are conveyed into the hot rolling stand 21 by the left conveyor roller 11, and the water-cooling component 4 cools and lubricates the aluminum strip. The bottom water cooling 42 ensures that the aluminum alloy plate and strip can smoothly enter between the upper hot rolling roller 22 and the lower hot rolling roller 23. The top water cooling 41 accurately sprays coolant, and the bottom collecting tank 217 collects the used coolant. When the plate and strip are discharged from the discharge port 212, the air-cooling component 5 removes the oxide layer on the surface of the aluminum alloy plate and blows off the surface water stains to reduce the contamination of the conveyor roller 11 by the coolant. A cleaning component 6 is provided to perform self-cleaning operation on the upper hot rolling roller 22 and the lower hot rolling roller 23 during hot rolling. The first cleaning component 7 scrapes off the coolant adhering to the surface, and the second cleaning component 8 cleans the surface impurities to avoid the formation of dirty residues and reduce the subsequent cleaning pressure.

[0045] The foregoing description shows and describes preferred embodiments of the present invention. As previously mentioned, it should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the present invention as taught herein or through the techniques or knowledge of the relevant art. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the claims appended hereto.

Claims

1. A hot rolling device for aluminum alloy plates and strips, comprising a frame (1) and a hot rolling assembly (2), wherein the hot rolling assembly (2) comprises a hot rolling frame (21), a plurality of upper hot rolling rollers (22) and a plurality of lower hot rolling rollers (23), wherein the hot rolling frame (21) is arranged above the middle of the frame (1), and a feed inlet (211) and a discharge outlet (212) are provided on both sides of the hot rolling frame (21), the upper hot rolling rollers (22) and the lower hot rolling rollers (23) are both positioned and rotatably installed in the hot rolling frame (21), and the upper hot rolling rollers (22) are arranged above the lower hot rolling rollers (23), characterized in that: Also includes: A cooling assembly (3), wherein the cooling assembly (3) comprises a water cooling component (4) and an air cooling component (5), wherein the water cooling component (4) comprises a top water cooling component (41) and a bottom water cooling component (42), wherein the top water cooling component (41) is arrayed on a top side of a hot rolling stand (21), wherein the bottom water cooling component (42) is arrayed on a side of the hot rolling stand (21) close to a feed inlet (211), wherein the top water cooling component (41) is fixed on the hot rolling stand (21) and is arranged between two adjacent upper hot rolling rollers (22), and wherein the air cooling component (5) is arranged on a side of the hot rolling stand (21) close to a feed outlet (212); A cleaning assembly (6), the cleaning assembly (6) comprising a first cleaning member (7) arranged at the top of a hot rolling stand (21) and a second cleaning member (8) arranged at the bottom of the hot rolling stand (21), the first cleaning member (7) being provided in plurality and being rotatably mounted at both ends in the hot rolling stand (21), the first cleaning member (7) being provided corresponding to an upper hot rolling roller (22), the second cleaning member (8) being provided in plurality and being vertically slidably arranged in the hot rolling stand (21), and the second cleaning member (8) being arranged between two adjacent lower hot rolling rollers (23).

2. The aluminum alloy strip hot rolling device according to claim 1, characterized in that: The top water cooling (41) includes a cooling liquid nozzle (411) and a cooling frame (412). The cooling frame (412) is arranged along the width direction of the hot rolling frame (21). The cooling liquid nozzle (411) array is arranged on the cooling frame (412). A shielding plate (413) is also extended on the cooling frame (412). The shielding plate (413) is arranged above the cooling liquid nozzle (411). The bottom water cooling (42) is arranged obliquely and the top end is close to the side of the lower hot rolling roller (23).

3. The aluminum alloy strip hot rolling device according to claim 2, characterized in that: The first cleaning member (7) is arranged above the upper hot rolling roller (22), and comprises a cleaning roller (71) and cleaning scrapers (72) arranged in a circumferential array on the cleaning roller (71), the cleaning scrapers (72) being clamped with the cleaning roller (71), and the side of the cleaning scrapers (72) away from the cleaning roller (71) abuts against the top of the upper hot rolling roller (22), and the first cleaning member (7) further comprises an upper driving member (73), and the upper driving member (73) corresponds to the cleaning roller (71) and drives the cleaning roller (71) to rotate.

4. The aluminum alloy strip hot rolling device according to claim 3, characterized in that: A plurality of inspection openings (213) are provided on the top of the hot rolling stand (21) corresponding to the first cleaning member (7), and an inspection door (214) is hingedly provided on the inspection opening (213).

5. The aluminum alloy strip hot rolling device according to claim 4, characterized in that: The second cleaning member (8) comprises a cleaning member (81) and a sliding member (82); the sliding member (82) is arranged at both ends of the cleaning member (81) and drives the cleaning member (81) to slide vertically in the hot rolling stand (21); the cleaning member (81) comprises a cleaning roller (811), a grinding block (812) and water-absorbing cotton (813); the cleaning roller (811) is arranged along the width direction of the hot rolling stand (21) and is connected to the sliding member (82) at both ends; the grinding block (812) and the water-absorbing cotton (813) are arranged in a circumferential array on the cleaning roller (811); the grinding block (812) and the water-absorbing cotton (813) are arranged intermittently.

6. The aluminum alloy strip hot rolling device according to claim 5, characterized in that: The sliding member (82) comprises a support frame (821) and a sliding drive (822); the sliding drive (822) controls the support frame (821) to slide vertically and is arranged in the side wall of the hot rolling stand (21); the side wall of the hot rolling stand (21) is provided with a sliding groove (218) corresponding to the support frame (821); a receiving hole (8211) for receiving the cleaning member (81) is provided in the support frame (821); and a sealing ring (8212) is further arranged between the cleaning member (81) and the support frame (821).

7. The aluminum alloy strip hot rolling device according to claim 6, characterized in that: The feed inlet (211) and the discharge outlet (212) are both provided with shielding frames (215), and a wiping roller (216) is also rotatably connected to the bottom of the shielding frame (215) on the side close to the discharge outlet (212), and a liquid collecting tank (217) is also provided at the bottom of the hot rolling frame (21).

8. The aluminum alloy strip hot rolling device according to claim 1, characterized in that: The frame (1) is also provided with a plurality of evenly distributed conveying rollers (11), the two ends of the conveying rollers (11) being mounted on the frame (1) in a positionable and rotatable manner, a heat-insulating cover (12) being provided above the conveying rollers (11) on the side close to the feed port (211), an abutment roller (13) being provided above the conveying rollers (11) on the side close to the discharge port (212), an abutment frame (14) extending upwards from the side of the frame (1) close to the discharge port (212), and the two ends of the abutment rollers (13) being mounted on the abutment frame (14) in a positionable and rotatable manner.

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