Method for adjusting roll gap of rolling mill

Abstract

The invention relates to the technical field of rolling mill roll gap adjustment, in particular to a rolling mill roll gap adjustment method which comprises a rack, a hydraulic adjusting cylinder, a side groove, a driver, a driving roll, a control panel and a distance sensor and further comprises a reinforcing assembly, a lower scraping assembly, an upper scraping assembly, an adjusting roll assembly, an air blowing assembly and a rack. The reinforcing assembly is installed at the bottom of the hydraulic adjusting cylinder, the end of the reinforcing assembly extends into the side groove, and the lower scraping assembly and the upper scraping assembly are both installed on the same side of the rack. The upper scraper and the lower scraper are arranged on the upper side and the lower side of the steel plate correspondingly, oxide skin is rapidly broken under the action of sprayed high-pressure wind power, and the mode that the position of the upper scraper is synchronously changed when the roll gap width value is adjusted is adopted; the hot rolling device has the advantages of being convenient to adjust and use and capable of fully guaranteeing the hot rolling precision after the roll gap is adjusted.

Description

Technical Field

[0001] The present invention relates to the technical field of rolling mill roll gap adjustment, and specifically provides a method for adjusting the roll gap of a rolling mill. Background Art

[0002] A rolling mill is a device used for metal processing, mainly for processing metal billets into metal products with certain shapes, dimensions, and properties through a rolling process. Its working principle is to use two or more relatively rotating rolls to deform the metal billet under the action of pressure and shear force between the rolls. By controlling the rotational speed, pressure, and spacing of the rolls, the metal billet can be rolled into products of various shapes and dimensions. Rolling mills can be divided into cold rolling mills and hot rolling mills. Since hot rolling can break the coarse grains in the as-cast structure, eliminate casting defects, make the internal grain structure of the material more uniform and dense, and thus significantly improve the strength, toughness, and plasticity of the metal, hot rolling mills are usually selected for processing metal sheets.

[0003] During the hot rolling process of steel plates, the scale formed on the surface of the steel plate adheres to the surface of the rolls when the steel plate passes through the rolls, resulting in a difference between the actual width value and the required width value of the roll gap, which directly affects the rolling accuracy of the rolling mill. In this case, the prior art usually blows high-pressure air onto the surface of the steel plate to quickly break the scale, which then falls off the surface of the steel plate under the action of the wind. However, when rolling steel plates with a large width and changing the rolling thickness, the scale is likely to accumulate on the surface of the steel plate and cannot fall off. If the wind pressure is further increased, the temperature of the steel plate will change significantly per unit time, which is likely to affect the subsequent hot rolling effect of the steel plate.

[0004] Therefore, a method for adjusting the roll gap of a rolling mill is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for adjusting the roll gap of a rolling mill. By respectively arranging an upper scraper and a lower scraper on the upper and lower sides of the steel plate, and combining the action of spraying high-pressure wind to quickly break the scale, and synchronously changing the position of the upper scraper when adjusting the width value of the roll gap, the problem that the scale cannot completely detach from the surface of the steel plate during the hot rolling of relatively wide steel plates, thereby affecting the rolling accuracy after roll gap adjustment, is solved. The method has the advantages of convenient adjustment and use, and can fully ensure the hot rolling accuracy after roll gap adjustment.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A rolling mill roll gap adjusting device includes a frame, a hydraulic adjusting cylinder, a side groove, a driver, a driving roll, a control panel, and a distance sensor. It also includes a reinforcement component, a lower scraping component, an upper scraping component, an adjusting roll component, a blowing component, and a rack. The reinforcement component is installed at the bottom of the hydraulic adjusting cylinder, and the end of the reinforcement component extends into the side groove. The lower scraping component and the upper scraping component are both installed on the same side of the frame. The adjusting roll component is installed between the two reinforcement components. The blowing component is connected to the upper scraping component. The rack is installed on the surface of the adjusting roll component and is connected to the upper scraping component. When adjusting the roll gap width, the control panel releases the restriction on the reinforcement component and controls the telescopic movement of the hydraulic adjusting cylinder. When the hydraulic adjusting cylinder expands and contracts, it drives the adjusting roll component to move vertically through the reinforcement component. At the same time, the rack moves together with the reinforcement component to correspondingly adjust the height of the bottom of the upper scraping component, keeping the bottom of the adjusting roll component flush with the bottom of the upper scraping component.

[0008] Preferably, the adjusting roll component includes a limiting groove, a follower roll, a through block, a connecting block, and a slot. Two limiting grooves are parallelly opened on both sides of the frame. The connecting block is installed at the bottom of the hydraulic adjusting cylinder. The through block is slidably arranged in the limiting groove, and the end of the through block is connected to the connecting block. The bottom of the rack is fixedly connected to the surface of the through block. The follower roll is rotatably arranged between the two connecting blocks. The slot is opened on both sides of the connecting block.

[0009] Preferably, the reinforcement component includes a reinforcement block, an insertion block, an electric push rod, and a tooth block. The reinforcement block is installed on the side wall of the connecting block, and the end of the reinforcement block extends into the side groove. The insertion block is inserted into the slot. The electric push rod is installed inside the reinforcement block. The tooth block is installed at the end of the electric push rod, and when the tooth block protrudes from the reinforcement block, it fits with the side groove.

[0010] Preferably, the upper scraping component includes a second limiting frame, a screw rod, a sliding block, a through strip, an upper scraper, a transmission rod, and a gear. The second limiting frame is installed on the side wall of the frame. The screw rod is rotatably arranged inside the second limiting frame. The sliding block is slidably arranged inside the second limiting frame, and the sliding block is threadedly connected to the screw rod. The through strip is installed on the side wall of the sliding block, and the end of the through strip extends outside the second limiting frame. The upper scraper is installed between the end of the through strip and the side wall of the sliding block. The transmission rod is connected to the screw rod through a universal coupling. The gear is installed at the end of the transmission rod, and the gear meshes with the rack.

[0011] Preferably, the blowing component includes an air pump, a conduit, a fitting frame, and air outlet holes. The fitting frame is installed on the surface of the upper scraper. The conduit is connected between the end of the fitting frame and the end of the air pump. The air pump is connected to the controller. The air outlet holes are opened at the bottom of the fitting frame.

[0012] Preferably, the cross-sectional structure of the upper scraper is V-shaped, and the side of the upper scraper close to the follower roll is the concave side.

[0013] Preferably, the air outlet holes are arranged at equal intervals, and the bottom of the air outlet holes is biased towards the side away from the upper scraper.

[0014] Preferably, the lower scraping assembly includes a first limiting frame, a lower scraper, an elastic device and an extension block. The first limiting frame is installed on the side wall of the frame. The elastic device and the extension block are both installed inside the first limiting frame, and the elastic device penetrates through the extension block. The lower scraper is installed between the ends of the extension block.

[0015] A method for adjusting the roll gap of a rolling mill, applicable to a roll gap adjusting device of a rolling mill, includes the following steps:

[0016] S1. When the corresponding button on the control panel is pressed, the electric push rod and the hydraulic adjusting cylinder are started simultaneously. The electric push rod contracts to drive the tooth block to translate along the inner wall of the reinforcement block and separate from the side groove. When the hydraulic adjusting cylinder extends and retracts to the corresponding length, it changes the height of the connecting block and the reinforcement block.

[0017] S2. The rack changes its height together with the connecting block through the through block. When the height of the rack changes, it drives the gear to rotate. When the transmission rod rotates with the gear, it drives the screw rod to rotate through the universal coupling. Then, the sliding block moves along the inner wall of the second limiting frame in the corresponding direction to keep the bottom of the upper scraper flush with the bottom of the follower roll.

[0018] S3. After the roll gap adjustment is completed, the distance sensor detects the adjusted roll gap width. When the roll gap width is consistent with the set value, the control panel switches the power supply of the electric push rod through the built-in timing switch, so that the electric push rod pushes the tooth block to fit with the side groove.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. When the present invention performs roll gap adjustment operations, the upper scraper and the lower scraper are respectively attached to the upper and lower surfaces of the steel plate. Combined with the action of the high-pressure wind sprayed on the upper surface of the steel plate, the scale formed on the surface of the steel plate can be quickly removed, and it is not affected by the width of the rolled steel plate, fully ensuring the rolling accuracy of the steel plate after roll gap adjustment. When changing the distance between the driving roll and the follower roll, the height of the upper scraper can be synchronously changed to keep the bottom of the upper scraper flush with the bottom of the follower roll. Therefore, it is not necessary to additionally adjust the height of the upper scraper after adjusting the roll gap value, and the operation is relatively simple.

[0021] 2. Through the set reinforcement components and adjusting roller components, when changing the height of the follower roller, the electric push rod contracts to drive the tooth block to separate from the tooth surface of the side groove, which can ensure the smooth movement of the reinforcement block and the connection block. After the reinforcement block and the connection block are adjusted in place, the electric push rod extends to make the tooth block fit the tooth surface of the side groove. During the subsequent rolling process, by using the fit between the tooth block and the side groove, the stability of the follower roller can be improved, thereby reducing the pressure burden on the hydraulic adjusting cylinder, extending the overall service life of the equipment, and at the same time, it can also assist in improving the accuracy after roll gap adjustment, thereby ensuring the rolling accuracy of the steel plate.

[0022] 3. Through the set rack, upper scraping component and adjusting roller components, when the hydraulic adjusting cylinder expands and contracts to change the height of the follower roller, thereby changing the gap size between the driving roller and the follower roller, the rack, as the transmission component of the upper scraping component and the adjusting roller components, can use the vertical displacement of the follower roller to provide power input for the screw rod, and then correspondingly adjust the bottom height of the upper scraper to keep the bottom of the upper scraper flush with the bottom of the follower roller. Thus, it is ensured that the upper scraper can accurately fit the surface of the steel plate to remove the scale, thereby effectively maintaining the accuracy after roll gap adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the overall structural schematic diagram of the present invention;

[0024] Figure 2 is the structural schematic diagram of the adjusting roller components of the present invention;

[0025] Figure 3 is the structural schematic diagram of the reinforcement components of the present invention;

[0026] Figure 4 is the cross-sectional view of the reinforcement components of the present invention;

[0027] Figure 5 is the structural schematic diagram of the upper scraping component of the present invention;

[0028] Figure 6 is the cross-sectional view of the second limiting frame of the present invention;

[0029] Figure 7 is the cross-sectional view of the fitting frame of the present invention;

[0030] Figure 8 is the structural schematic diagram of the lower scraping component of the present invention.

[0031] In the figure: 1, frame; 2, hydraulic regulating cylinder; 3, side groove; 4, reinforcement assembly; 41, reinforcement block; 42, insertion block; 43, electric push rod; 44, tooth block; 5, driver; 6, lower scraping assembly; 61, first limiting frame; 62, lower scraping knife; 63, elastic device; 64, extension block; 7, upper scraping assembly; 71, second limiting frame; 72, screw rod; 73, sliding block; 74, through strip; 75, upper scraping knife; 76, transmission rod; 77, gear; 8, driving roller; 9, adjusting roller assembly; 91, limiting groove; 92, follower roller; 93, through block; 94, connecting block; 95, slot; 10, control panel; 11, blowing assembly; 111, air pump; 112, conduit; 113, fitting frame; 1131, air outlet hole; 12, distance sensor; 13, rack. Detailed implementation manners

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figures 1 to 8 , the present invention provides a method for adjusting the roll gap of a rolling mill, and the technical solution is as follows:

[0034] Refer to Figure 1 and Figure 2, A rolling mill roll gap adjusting device, comprising a frame 1, a hydraulic adjusting cylinder 2, side grooves 3, a driver 5, a driving roll 8, a control panel 10, and a distance sensor 12. There are two groups of frames 1, and the two frames 1 are arranged in parallel. The hydraulic adjusting cylinder 2 is installed on the side of the frames 1 away from each other, and the hydraulic adjusting cylinder 2 is reinforced and limited by an installation bracket. Side grooves 3 are provided on the side walls of both frames 1. The driver 5 is installed on the side wall of one of the frames 1. The driving roll 8 is rotationally installed between the two frames 1 in a limited manner, and the driver 5 is connected to the driving roll 8 through a speed reducer. The driver 5 provides power input for the driving roll 8. The control panel 10 is installed on the side wall of the frame 1 where the driver 5 is not installed. The distance sensor 12 is installed on the upper scraping component 7, and the distance sensor 12 is electrically connected to the control panel 10. It further includes a reinforcement component 4, a lower scraping component 6, an upper scraping component 7, an adjusting roll component 9, a blowing component 11, and a rack 13. The reinforcement component 4 is installed at the bottom of the hydraulic adjusting cylinder 2, and the end of the reinforcement component 4 extends into the side groove 3. The lower scraping component 6 and the upper scraping component 7 are both installed on the same side of the frame 1. The adjusting roll component 9 is installed between the two reinforcement components 4. The blowing component 11 is connected to the upper scraping component 7. The rack 13 is installed on the surface of the adjusting roll component 9, and the rack 13 is connected to the upper scraping component 7. When adjusting the roll gap width, the control panel 10 releases the restriction on the reinforcement component 4 and controls the telescopic movement of the hydraulic adjusting cylinder 2. When the hydraulic adjusting cylinder 2 expands and contracts, it drives the adjusting roll component 9 to move vertically through the reinforcement component 4. At the same time, the rack 13 moves with the adjusting roll component 9 to correspondingly adjust the height of the bottom of the upper scraping component 7, keeping the bottom of the adjusting roll component 9 flush with the bottom of the upper scraping component 7. When it is necessary to adjust and change the roll gap value, press the corresponding button on the control panel 10. The control panel 10 first turns on the power supply of the reinforcement component 4, causing the reinforcement component 4 to separate from the tooth surface of the side groove 3. Subsequently, when the hydraulic adjusting cylinder 2 expands and contracts, the height of the reinforcement component 4 and the adjusting roll component 9 can be changed, thereby adjusting the roll gap value to an appropriate size. When the height of the reinforcement component 4 changes, the rack 13 moves vertically with the adjusting roll component 9. Furthermore, the rack 13 provides power input for the upper scraping component 7, changing the height of the bottom of the upper scraping component 7, and keeping the height of the bottom of the upper scraping component 7 consistent with the height of the follower roll 92 in the adjusting roll component 9, without the need to separately adjust the height of the upper scraping component 7.

[0035] Refer to Figure 1 and Figure 2, as an embodiment of the present invention, specifically, the adjusting roller assembly 9 includes a limiting groove 91, a follower roller 92, a penetrating block 93, a connecting block 94 and a slot 95. Two limiting grooves 91 are parallelly opened on both sides of the frame 1, and one limiting groove 91 is correspondingly provided on each frame 1, and the limiting groove 91 is located at the middle position between the two side grooves 3 on the same frame 1. The connecting block 94 is installed at the bottom of the hydraulic adjusting cylinder 2. When the hydraulic adjusting cylinder 2 expands and contracts, it drives the connecting block 94 to move in the vertical direction, thereby changing the height of the follower roller 92, and thus adjusting the value of the rolling mill roll gap. The penetrating block 93 is slidably arranged in the limiting groove 91, and the end of the penetrating block 93 is connected to the connecting block 94. The bottom of the rack 13 is fixedly connected to the surface of the penetrating block 93. The follower roller 92 is rotatably arranged between the two connecting blocks 94. Under the action of the penetrating block 93, the follower roller 92 can move together with the connecting block 94. The slots 95 are opened on both sides of the connecting block 94. When the penetrating block 93 undergoes a vertical displacement, the height of the rack 13 is synchronously changed. When the height of the rack 13 is changed, it provides power input for the upper scraping assembly 7.

[0036] Refer to Figure 3 and Figure 4 , as an embodiment of the present invention, specifically, the reinforcing assembly 4 includes a reinforcing block 41, an inserting block 42, an electric push rod 43, and a tooth block 44. The reinforcing block 41 is installed on the side wall of the connecting block 94, and the end of the reinforcing block 41 extends into the side groove 3. The inserting block 42 is inserted into the slot 95. The inserting block 42 is installed at one end of the reinforcing block 41 that does not extend into the side groove 3. Through the cooperation of the inserting block 42 and the slot 95, the reinforcing block 41 can be quickly installed and fixed to the connecting block 94. The electric push rod 43 is installed inside the reinforcing block 41. The tooth block 44 is installed at the end of the electric push rod 43, and when the tooth block 44 protrudes from the reinforcing block 41, it fits with the side groove 3. When it is necessary to adjust the width of the roll gap, the electric push rod 43 contracts to drive the tooth block 44 to separate from the tooth surface of the side groove 3. After the adjustment of the roll gap width is completed, the electric push rod 43 extends to push the tooth block 44 to fit with the tooth surface of the side groove 3.

[0037] Refer to Figure 5 and Figure 6, as an implementation manner of the present invention, specifically, the upper scraping component 7 includes a second limiting frame 71, a screw rod 72, a sliding block 73, a through strip 74, an upper scraping knife 75, a transmission rod 76 and a gear 77. The second limiting frame 71 is installed on the side wall of the frame 1. The screw rod 72 is rotatably arranged inside the second limiting frame 71. A chute is opened inside the second limiting frame 71. The sliding block 73 is slidably arranged inside the second limiting frame 71. The sliding block 73 is slidably fitted in the chute, and the sliding block 73 is threadedly connected with the screw rod 72. When the screw rod 72 rotates, according to the different rotation directions of the screw rod 72, the sliding block 73 is driven to move forward and backward along the chute correspondingly. The through strip 74 is installed on the side wall of the sliding block 73, and the end of the through strip 74 extends to the outside of the second limiting frame 71. The upper scraping knife 75 is installed between the end of the through strip 74 and the side wall of the sliding block 73. The transmission rod 76 is connected with the screw rod 72 through a universal coupling. The gear 77 is installed at the end of the transmission rod 76, and the gear 77 meshes with the rack 13. When the rack 13 moves in the vertical direction, the gear 77 is driven to rotate, and then the transmission rod 76 coaxial with the gear 77 is driven to rotate. The transmission rod 76 drives the screw rod 72 to rotate through the universal coupling, so that the sliding block 73 moves in the corresponding direction along the chute, thereby changing the bottom height of the upper scraping knife 75 and keeping the bottom of the upper scraping knife 75 flush with the bottom of the follower roller 92.

[0038] Refer to Figure 1 and Figure 7 , as an implementation manner of the present invention, specifically, the blowing component 11 includes an air pump 111, a conduit 112, a fitting frame 113 and air outlet holes 1131. The fitting frame 113 is installed on the surface of the upper scraping knife 75. The conduit 112 is connected between the end of the fitting frame 113 and the end of the air pump 111. The air pump 111 is connected with the controller. The air outlet holes 1131 are opened at the bottom of the fitting frame 113. The air pump 111 drives air to enter the fitting frame 113 through the conduit 112, and then the air is evenly blown onto the surface of the rolled steel plate from the air outlet holes 1131. While blowing the scale off the steel plate surface, the scale is blown towards the edge of the steel plate surface.

[0039] Refer to Figure 5 , as an implementation manner of the present invention, specifically, the cross-section structure of the upper scraping knife 75 is V-shaped, and the side of the upper scraping knife 75 close to the follower roller 92 is the concave side. After the steel plate contacts the surface of the upper scraping knife 75, as the steel plate continues to move towards the side of the follower roller 92 and the driving roller 8, the scale scraped off by the upper scraping knife 75 moves towards the edge of the upper scraping knife 75 until it falls from the edge of the upper scraping knife 75, avoiding the scale still remaining on the steel plate surface, thereby ensuring the accuracy after the roll gap of the rolling mill is adjusted.

[0040] Refer to Figure 7, as an embodiment of the present invention, specifically, the air outlet holes 1131 are arranged at equal intervals, and the bottom of the air outlet holes 1131 is arranged to deviate from the side of the upper scraper 75. The inclined arrangement of the air outlet holes 1131 can reserve a certain time for the fragmentation of the scale, thereby improving the cleaning effect of the subsequent upper scraper 75 on the scale.

[0041] Refer to Figure 8 , as an embodiment of the present invention, specifically, the lower scraping assembly 6 includes a first limiting frame 61, a lower scraper 62, an elastic device 63 and an extension block 64. The first limiting frame 61 is installed on the side wall of the frame 1. Both the elastic device 63 and the extension block 64 are installed inside the first limiting frame 61, and the elastic device 63 penetrates through the extension block 64. The elastic device 63 consists of a round rod and a spring assembly. The round rod penetrates through the extension block 64, and the spring is sleeved on the outer periphery of the round rod, and the spring abuts between the first limiting frame 61 and the extension block 64. The lower scraper 62 is installed between the ends of the extension block 64 and can be pushed upward by the elastic device 63. When the steel plate moves continuously, the top of the lower scraper 62 remains in contact with the bottom surface of the steel plate.

[0042] A method for adjusting the roll gap of a rolling mill, applicable to a roll gap adjusting device of a rolling mill, includes the following steps:

[0043] S1. When the corresponding button on the control panel 10 is pressed, the electric push rod 43 and the hydraulic adjusting cylinder 2 are started simultaneously. The electric push rod 43 contracts to drive the tooth block 44 to translate along the inner wall of the reinforcement block 41 and separate from the side groove 3. When the hydraulic adjusting cylinder 2 expands and contracts to the corresponding length, it changes the height of the connecting block 94 and the reinforcement block 41;

[0044] S2. The rack 13 changes its height together with the connecting block 94 through the through-block 93. When the height of the rack 13 changes, it drives the gear 77 to rotate. When the transmission rod 76 rotates with the gear 77, it drives the screw rod 72 to rotate through the universal coupling, and then the sliding block 73 moves in the corresponding direction along the inner wall of the second limiting frame 71 to keep the bottom of the upper scraper 75 flush with the bottom of the follower roll 92;

[0045] S3. After the roll gap adjustment is completed, the distance sensor 12 detects the adjusted roll gap width. When the roll gap width is consistent with the set value, the control panel 10 switches the power supply of the electric push rod 43 through the built-in timing switch, and then the electric push rod 43 pushes the tooth block 44 to fit with the side groove 3.

[0046] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rolling mill roll gap adjustment device, comprising a frame (1), a hydraulic adjustment cylinder (2), a side groove (3), a driver (5), a driving roller (8), a control panel (10), and a distance sensor (12), characterized in that: The machine also comprises a reinforcement component (4), a lower scraping component (6), an upper scraping component (7), an adjusting roller component (9), a blowing component (11) and a rack (13); the reinforcement component (4) is mounted at the bottom of the hydraulic adjustment cylinder (2), and the end of the reinforcement component (4) extends into the side groove (3); the lower scraping component (6) and the upper scraping component (7) are both mounted on the same side of the frame (1); the adjusting roller component (9) is mounted between the two reinforcement components (4); the blowing component (11) is connected to the upper scraping component (7); the rack (13) is installed on the surface of the adjusting roller assembly (9), and the rack (13) is connected to the upper scraping assembly (7). When adjusting the roller gap width, the control panel (10) releases the restriction on the reinforcement assembly (4) and controls the extension and retraction of the hydraulic adjustment cylinder (2). When the hydraulic adjustment cylinder (2) is extended and retracted, it drives the adjusting roller assembly (9) to move vertically through the reinforcement assembly (4). At the same time, the rack (13) moves together with the reinforcement assembly (4) to adjust the bottom height of the upper scraping assembly (7) accordingly, so as to keep the bottom of the adjusting roller assembly (9) flush with the bottom of the upper scraping assembly (7).

2. The rolling mill roll gap adjustment device according to claim 1, characterized in that: The adjusting roller assembly (9) comprises a limiting groove (91), a follower roller (92), a penetration block (93), a connecting block (94) and a slot (95); the two limiting grooves (91) are arranged in parallel on both sides of the frame (1); the connecting block (94) is installed at the bottom of the hydraulic adjustment cylinder (2); the penetration block (93) is slidably arranged in the limiting groove (91), and the end of the penetration block (93) is connected to the connecting block (94); the bottom of the rack (13) is fixedly connected to the surface of the penetration block (93); the follower roller (92) is rotatably arranged between the two connecting blocks (94); and the slot (95) is arranged on both sides of the connecting block (94).

3. The rolling mill roll gap adjustment device according to claim 2, characterized in that: The reinforcement assembly (4) comprises a reinforcement block (41), an insert block (42), an electric push rod (43), and a tooth block (44); the reinforcement block (41) is mounted on the side wall of the connection block (94), and the end of the reinforcement block (41) extends into the side groove (3); the insert block (42) is inserted into the slot (95); the electric push rod (43) is mounted on the inner side of the reinforcement block (41); the tooth block (44) is mounted on the end of the electric push rod (43), and the tooth block (44) is in contact with the side groove (3) when it protrudes from the reinforcement block (41).

4. The rolling mill roll gap adjustment device according to claim 3, characterized in that: The upper scraping assembly (7) comprises a second limiting frame (71), a screw rod (72), a sliding block (73), a penetration bar (74), an upper scraper (75), a transmission rod (76) and a gear (77); the second limiting frame (71) is mounted on a side wall of the frame (1); the screw rod (72) is rotatably arranged on the inner side of the second limiting frame (71); the sliding block (73) is slidably arranged on the inner side of the second limiting frame (71); and the sliding block (73) and the screw rod (74) are connected to each other. The second limit frame (71) is provided with a second through-bar (74) and a second through-bar (74) which is threadedly connected to the sliding block (73). The through-bar (74) is installed on the side wall of the sliding block (73), and the end of the through-bar (74) extends to the outside of the second limit frame (71). The upper scraper (75) is installed between the end of the through-bar (74) and the side wall of the sliding block (73). The transmission rod (76) is connected to the screw rod (72) through a universal coupling. The gear (77) is installed at the end of the transmission rod (76), and the gear (77) is meshed with the rack (13).

5. The rolling mill roll gap adjustment device according to claim 4, characterized in that: The blowing assembly (11) comprises an air pump (111), a duct (112), a fitting frame (113) and an air outlet (1131); the fitting frame (113) is mounted on the surface of the upper scraper (75); the duct (112) is connected between the end of the fitting frame (113) and the end of the air pump (111); the air pump (111) is connected to a controller; and the air outlet (1131) is provided at the bottom of the fitting frame (113).

6. The rolling mill roll gap adjustment device according to claim 4, characterized in that: The cross-section of the upper scraper (75) is V-shaped, and the side of the upper scraper (75) close to the follower roller (92) is a concave side.

7. The rolling mill roll gap adjustment device according to claim 5, characterized in that: The air outlet holes (1131) are arranged at equal intervals, and the bottom of the air outlet holes (1131) is arranged towards a side away from the upper scraper (75).

8. The rolling mill roll gap adjustment device according to claim 1, characterized in that: The lower scraping assembly (6) comprises a first limiting frame (61), a lower scraper (62), an elastic device (63) and an extension block (64); the first limiting frame (61) is mounted on a side wall of the frame (1); the elastic device (63) and the extension block (64) are both mounted on the inner side of the first limiting frame (61); the elastic device (63) passes through the extension block (64); and the lower scraper (62) is mounted between the ends of the extension block (64).

9. A method for adjusting the roll gap of a rolling mill, applicable to the rolling mill roll gap adjusting device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. When the corresponding button on the control panel (10) is pressed, the electric push rod (43) and the hydraulic adjustment cylinder (2) are started simultaneously, the electric push rod (43) contracts to drive the tooth block (44) to translate along the inner wall of the reinforcement block (41) and separate from the side groove (3), and the hydraulic adjustment cylinder (2) changes the height of the connection block (94) and the reinforcement block (41) when it is extended and retracted to a corresponding length; S2, the rack (13) changes height along with the connecting block (94) through the through block (93), and when the rack (13) changes height, it drives the gear (77) to rotate, and when the transmission rod (76) rotates along with the gear (77), it drives the screw (72) to rotate through the universal coupling, and then the sliding block (73) moves in the corresponding direction along the inner wall of the second limit frame (71), so as to keep the bottom of the upper scraper (75) flush with the bottom of the follower roller (92); S3. After the roller gap is adjusted, the distance sensor (12) detects the adjusted roller gap width. When the roller gap width is consistent with the set value, the control panel (10) switches the power supply of the electric push rod (43) through the built-in timing switch, so that the electric push rod (43) pushes the tooth block (44) to fit the side groove (3).

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