A multi-roller rolling mill roll changing device

Abstract

The application relates to a multi-roller rolling mill roll changing device and relates to the technical field of multi-roller rolling mills. The roll changing device comprises a roll changing frame, a first roller group and a first auxiliary roller group are arranged in the roll changing frame, the length direction of the first roller group is arranged in line with the length direction of the first auxiliary roller group, the first roller group and the first auxiliary roller group are connected with each other, the first roller group and the first auxiliary roller group are both slidably connected with the roll changing frame along the length direction of the first roller group and the first auxiliary roller group, and a first hydraulic driving element is connected to the first roller group; a second roller group is arranged vertically on the upper side of the first roller group, a second auxiliary roller group is connected to one side of the length direction of the second roller group, the length direction of the second auxiliary roller group is arranged in line with the length direction of the second roller group, the second roller group and the second auxiliary roller group are both slidably connected with the roll changing frame along the length direction of the second roller group and the second auxiliary roller group, and a second hydraulic driving element is connected to the second roller group. The application can realize quick replacement of rollers in the rolling mill, thereby reducing the influence on the working efficiency of the rolling mill.

Description

Technical Field

[0001] This application relates to the technical field of multi-roll mills, and in particular to a roll changing device for multi-roll mills. Background Technology

[0002] A rolling mill is a piece of equipment used to perform the metal rolling process. It generally refers to the equipment that completes the entire rolling production process, including uncoiling machines, roll pressing systems, drive systems, hydraulic systems, control systems, and roll removal devices. However, the term "rolling mill" usually refers only to the main equipment. Rolling mills can be classified according to the number of rolls: two-roll, four-roll, six-roll, eight-roll, twelve-roll, eighteen-roll, etc.; and according to the arrangement of the rolls: "L" type, "T" type, "F" type, "Z" type, and "S" type. A rolling mill with multiple rolls is called a multi-roll mill. A multi-roll mill consists of rolls, mill stands, bearing saddles, bearings, worktables, rolling guides, rail supports, roll adjustment devices, upper roll balancing devices, and roll changing devices.

[0003] Currently, during the rolling process, on the one hand, the friction between the metal material and the rolls generates metal powder and debris. This powder and debris adhere to the rolls, and excessive accumulation not only affects workpiece processing but may also enter other transmission components, impacting the operating accuracy of the rolling mill and shortening its service life. On the other hand, uneven wear occurs on the rolls during rolling, and once a certain value is exceeded, high-precision roll grinding repair is required.

[0004] Therefore, after a period of use, the rolls need to be replaced to ensure the mill can operate normally. Common manual disassembly methods often involve using a counterweight in conjunction with a crane to complete the roll replacement, which is a dangerous and inefficient operation.

[0005] Therefore, in order to address the safety risks associated with manual operations and improve operational efficiency, most roll changing methods currently employ mechanical equipment. A common approach is to fix the end of the roll to be replaced at the output end of a multi-stage hydraulic device, then extract the roll using the same device. After extraction, the old and new rolls are replaced manually, and then the new roll is pushed into the device using another multi-stage hydraulic device to complete the roll replacement.

[0006] Regarding the aforementioned technologies, while the multi-stage hydraulic equipment can increase the speed and safety of roll changing, it still requires significant manual intervention and therefore still necessitates considerable changeover time. Consequently, the rolling mill needs to be shut down for an extended period during roll changing, which reduces its production efficiency. Summary of the Invention

[0007] This application provides a roll changing device for a multi-roll mill, the purpose of which is to achieve rapid roll changing, reduce manual intervention, increase roll changing speed, and thus increase the production efficiency of the mill.

[0008] The multi-roll mill roll changing device provided in this application adopts the following technical solution: A multi-roll mill roll changing device includes a roll changing frame, in which a first roll group and a first auxiliary roll group are arranged. The length direction of the first roll group and the length direction of the first auxiliary roll group are collinear. The first roll group is connected to the first auxiliary roll group on one side along its own length direction. Both the first roll group and the first auxiliary roll group are slidably connected to the roll changing frame along their own length direction. A first hydraulic drive component is connected to the first roll group. A second roll group is arranged vertically on the upper side of the first roll group. A second auxiliary roll group is connected to one side of the second roll group along its length direction. The length direction of the second auxiliary roll group is collinear with the length direction of the second roll group. Both the second roll group and the second auxiliary roll group are slidably connected to the roll changing frame along their own length direction. A second hydraulic drive component is connected to the second roll group.

[0009] By adopting the above technical solution, firstly, the first roll group and the second roll group are arranged facing each other in the vertical direction. Therefore, the first roll group and the second roll group can form a pair of rolls inside the rolling mill, thereby enabling roll rolling operations.

[0010] Secondly, since the first auxiliary roll group is set on one side of the first roll group and the second auxiliary roll group is set on one side of the second roll group, when the first roll group and the second roll group need to be replaced due to wear or other reasons, a quick switch can be achieved through the first hydraulic drive component and the second hydraulic drive component. The first roll group is pushed out of the mill, the first auxiliary roll group is pushed into the mill, the second roll group is pushed out of the mill, and the second auxiliary roll group is dragged into the mill. At this time, the first auxiliary roll group and the second auxiliary roll group form a new pair of rolls, which can meet the normal operation of the mill. Therefore, this setting can realize the rapid replacement of rolls in the mill, ensure that the mill can quickly resume operation, and thus improve the working efficiency of the mill.

[0011] Optionally, the first roll group and the second roll group are arranged facing each other in the vertical direction, and the first auxiliary roll group and the second auxiliary roll group are located on both sides of the length direction of the first roll group.

[0012] By adopting the above technical solution, since the first and second auxiliary roll groups are located on both sides of the first roll group in the horizontal direction, the upper space of the first auxiliary roll group and the lower space of the second auxiliary roll group are both empty when no switching is performed, which facilitates the installation of new rolls in the first and second auxiliary roll groups. Similarly, after switching, the upper space of the first roll group and the lower space of the second roll group are both empty, which facilitates the replacement of new rolls in the first and second roll groups.

[0013] Optionally, the first auxiliary roller group includes a first roller and a first mounting base. The first mounting base is provided with two mounting plates, which are arranged opposite to each other along the axial direction of the first roller. The mounting plates are provided with insertion holes, which are inserted into one end of the first roller, and the first roller is rotatably connected to the inner wall of the insertion hole. The mounting plate is slidably connected to the first mounting base along the axial direction of the first roller, and a third hydraulic drive component is connected to the mounting plate.

[0014] By adopting the above technical solution, firstly, the first roll in the first auxiliary roll group is a rolling roll capable of rolling operations, and the first mounting base is provided for mounting the first roll. Both mounting plates on the first mounting base are slidably connected to the first mounting base, and the insertion holes on the mounting plates are engaged with the corresponding first rolls. Therefore, under the drive of the third hydraulic drive component, the two mounting plates can move closer to each other, allowing the two ends of the first roll to be inserted into the corresponding insertion holes, achieving rapid installation of the first roll. Conversely, when the two mounting plates move away from each other, the two ends of the first roll can be quickly pulled out from the corresponding insertion holes, achieving rapid disassembly and reassembly of the first roll.

[0015] Optionally, a support plate is provided on the upper side of the first mounting base at a distance, the support plate is located between two mounting plates, and a lifting drive component is provided between the support plate and the first mounting base, the driving direction of the lifting drive component being arranged along the spacing direction between the support plate and the first mounting base.

[0016] By adopting the above technical solution, the support plate is located between the two mounting plates, and a lifting drive component is provided on the lower side of the support plate. Therefore, during the process of disassembling or installing the first roller, the support plate can support the first roller and position it in the vertical direction, which facilitates the installation and disassembly of the first roller.

[0017] Optionally, the support plate has an arc-shaped support groove on the side facing the first roller, and the arc-shaped support groove passes through the support plate along the axial direction of the first roller.

[0018] By adopting the above technical solution, the arc-shaped support groove on the support plate allows the arc-shaped support groove to better fit the side wall of the first roller when the support plate supports the first roller, thereby giving the first roller a better support effect.

[0019] Optionally, a rotating platform is provided between the support plate and the lifting drive component. The rotating platform is rotatably connected to the support plate. A first rotating drive component is provided on the rotating platform. The first rotating drive component is axially connected to the support plate and the rotating platform on both sides respectively.

[0020] By adopting the above technical solution, a rotating platform is provided between the support plate and the lifting drive component, and a first rotating drive component is provided between the rotating platform and the support plate, so the support plate can rotate on the rotating platform. Due to the setting of the roller changing frame, it is not convenient to move the first roller to the support plate by a crane. Therefore, by rotating the support plate, a new first roller can be pushed into the support plate from the outside of the roller changing frame through a multi-stage hydraulic cylinder, thus facilitating the replacement of the first roller.

[0021] Optionally, the first roll group has the same structure as the first auxiliary roll group.

[0022] By adopting the above technical solution, since the first roll group and the first auxiliary roll group have the same structure, it is easy for them to be replaced by each other.

[0023] Optionally, a fine-tuning component is provided on the side of the mounting plate facing the first roller. The fine-tuning component includes a lifting groove, which is opened on the side of the mounting plate facing the first roller. A connecting plate is inserted into the lifting groove. The connecting plate is slidably connected to the inner wall of the lifting groove in the vertical direction. A fine-tuning drive is connected to the connecting plate, and the driving direction of the fine-tuning drive is set in the vertical direction. The insertion hole is located on the connecting plate.

[0024] By adopting the above technical solution, the vertical position of the connecting plate can be adjusted through the lifting groove on the mounting plate and the cooperation of the connecting plate and the fine-tuning drive component in the fine-tuning assembly. Since the insertion hole is located on the connecting plate, the connecting plate can be used to install the first roller. Therefore, after the first roller is installed, the vertical height of the first roller can be adjusted by the fine-tuning assembly. Before installing the first roller, the position of the connecting plate can be adjusted by the fine-tuning assembly to ensure that the insertion hole is aligned with the first roller, facilitating the installation of the first roller.

[0025] Optionally, the roll changing frame is provided with two auxiliary roll changing assemblies, and the two auxiliary roll changing assemblies are spaced apart on both sides of the first roll group along the length direction of the first roll group; The auxiliary roll changing assembly includes a base plate, which is slidably connected to the roll changing frame. A roll changing drive is connected to the base plate, and the driving direction of the roll changing drive is set in the horizontal direction and perpendicular to the length direction of the first roll group. A gripping plate is provided on the base plate, and a lifting drive is provided between the gripping plate and the base plate. The two ends of the lifting drive are respectively connected to the gripping plate and the base plate.

[0026] By adopting the above technical solution, since the second roll group and the second auxiliary roll group are located above the first roll group in the vertical direction, the second roll group and the second auxiliary roll group are in an upside-down state, which makes it inconvenient to replace the rolls.

[0027] The auxiliary roll changing assembly is set up such that the base plate is slidably connected to the roll changing frame, and the driving direction of the roll changing drive connected to the base plate is set in the horizontal direction and perpendicular to the length direction of the first roll group. Therefore, the base plate can be moved to the lower side of the second roll group or the second auxiliary roll group by the roll changing drive.

[0028] The gripping plate on the upper side of the base plate can be raised to an increased height via a lifting drive between the gripping plate and the base plate. Therefore, when the rolls in the second roll group or the second auxiliary roll group are disassembled, the gripping plate can support the rolls, facilitating their disassembly. When the rolls in the second roll group or the second auxiliary roll group are installed, the gripping plate can lift the new rolls, facilitating their installation.

[0029] Optionally, a lifting plate is provided between the gripping plate and the lifting drive component, the lifting plate is rotatably connected to the gripping plate, and a second rotation drive component is provided between the lifting plate and the gripping plate, the second rotation drive component being axially connected to the gripping plate and the lifting plate on both sides respectively.

[0030] By adopting the above technical solution, the lifting plate supports the gripping plate, while the second rotary drive allows the gripping plate to rotate. Since the second roll group and the second auxiliary roll group are in an inverted state, it is inconvenient to lift the rolls using a crane. Therefore, the second rotary drive allows the gripping plate to rotate, facilitating the installation of new rolls onto the gripping plate, and thus simplifying the installation of new rolls.

[0031] In summary, this application includes at least one of the following beneficial technical effects: 1. The establishment of the first and second auxiliary roll groups enables timely replacement of the first and second roll groups when rolls malfunction, ensuring the normal operation of the mill. Furthermore, it allows for the replacement of damaged rolls within the first and second roll groups during mill operation. Therefore, it reduces the impact of roll replacement on mill efficiency and increases the roll replacement speed within the mill.

[0032] 2. The first mounting base enables the automatic installation and removal of the first roll, facilitating rapid roll replacement.

[0033] 3. The auxiliary roll changing assembly provides support for the inverted second roll and the old rolls that are being disassembled from the second auxiliary roll set, or for the new rolls that need to be replaced, facilitating the installation and removal of the rolls. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of the roller changing device in this application.

[0035] Figure 2 This is a schematic diagram of the overall structure of the first auxiliary roller group in this application.

[0036] Figure 3 This is a cross-sectional structural schematic diagram of the first auxiliary roller group in this application.

[0037] Figure 4 This is a cross-sectional view of the second auxiliary roller assembly in this application.

[0038] Figure 5 This is a schematic diagram of the overall structure of the roller changing device of this application from another perspective.

[0039] Figure 6 This is a schematic diagram of the overall structure of the auxiliary roller changing assembly in this application.

[0040] Figure 7 This is a cross-sectional view of the auxiliary roller changing assembly in this application.

[0041] In the diagram, 1. Roll changing frame; 2. First rolling mill group; 3. Second roll group; 4. First auxiliary roller group; 41. First roller; 42. First mounting base; 421. Mounting plate; 4211. First slide groove; 4212. First slide rail; 4213. Third hydraulic drive component; 422. Fine-tuning assembly; 4221. Lifting groove; 4222. Connecting plate; 4223. Insertion hole; 4224. Fine-tuning drive component; 423. Support plate; 4231. Lifting drive component; 4232. Arc-shaped support groove; 4233. Rotating platform; 4234. First rotation drive component; 5. Second auxiliary roller group; 51. Second roller; 52. Second mounting base; 521. Positioning clamp; 5211. Connecting hole; 5212. Second slide groove; 5213. Second slide rail; 5214. Fourth hydraulic drive component; 6. First hydraulic drive component; 7. Second hydraulic drive component; 8. Auxiliary roller changing assembly; 81. Base plate; 82. Gripping plate; 821. Arc-shaped gripping groove; 83. Lifting plate; 84. Second rotation drive component; 85. Lifting drive component; 86. Guide column; 87. Guide groove; 88. Roller changing drive component. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1 -Appendix Figure 7 This application will be described in further detail below.

[0043] A roll changing device for a multi-roll mill, as described in the following figure. Figure 1 It includes a roll changing frame 1, on which a first roll group 2, a second roll group 3, a first auxiliary roll group 4, and a second auxiliary roll group 5 are arranged.

[0044] Reference Figure 1 The length direction of the first roll group 2 is collinear with the length direction of the first auxiliary roll group 4. The first roll group 2 is connected to the first auxiliary roll group 4 along one side of its own length direction. Both the first roll group 2 and the first auxiliary roll group 4 are slidably connected to the roll changing frame 1 along their own length directions. A first hydraulic drive unit 6 is connected to the first roll group 2 or the first auxiliary roll group 4. The first hydraulic drive unit 6 is a multi-stage hydraulic cylinder, and the driving direction of the first hydraulic drive unit 6 is set along the length direction of the first roll group 2.

[0045] The second roll group 3 is vertically positioned above the first roll group 2. The length direction of the second roll group 3 is collinear with the length direction of the second auxiliary roll group 5. The second roll group 3 is connected to the second auxiliary roll group 5 along its own length. Both the second roll group 3 and the second auxiliary roll group 5 are slidably connected to the roll changing frame 1 along their own length. A second hydraulic drive unit 7 is connected to the second roll group 3 or the second auxiliary roll group 5. The second hydraulic drive unit 7 is a multi-stage hydraulic cylinder, and its driving direction is along the length direction of the second roll group 3.

[0046] Therefore, since the first roll group 2 and the second roll group 3 are arranged vertically opposite each other, they can form a pair of rolls within the mill, enabling roll rolling operations. When the first roll group 2 and the second roll group 3 need to be replaced, the first hydraulic drive unit 6 operates to push the first roll group 2 out of the mill and simultaneously push the first auxiliary roll group 4 into the mill; at the same time, the second hydraulic drive unit 7 operates to push the second roll group 3 out of the mill and simultaneously push the second auxiliary roll group 5 into the mill. Thus, the cooperation of the first auxiliary roll group 4 and the second auxiliary roll group 5 at this time forms a pair of rolls, fulfilling the function of the mill and enabling rapid roll replacement within the mill.

[0047] Reference Figure 1 and Figure 2 The first auxiliary roll group 4 includes a first roll 41 and a first mounting base 42. The lower side of the first mounting base 42 is slidably connected to the roll changing frame 1. The first roll 41 is located on the upper side of the first mounting base 42, and the axial direction of the first roll 41 is arranged along the length direction of the first mounting base 42. Two mounting plates 421 are provided on the first mounting base 42, and the two mounting plates 421 are arranged opposite each other along the axial direction of the first roll 41. The two ends of the first roll 41 are rotatably connected to the corresponding mounting plates 421. Therefore, the structural arrangement of the first auxiliary roll group 4 allows the first roll 41 to be used as a spare roll, facilitating the rapid replacement of the first roll group 2 with the first auxiliary roll group 4.

[0048] Reference Figure 2 and Figure 3 The mounting plate 421 has a plurality of first sliding grooves 4211 on the side facing the first mounting base 42. The plurality of first sliding grooves 4211 are spaced apart along the width direction of the first mounting base 42 and penetrate the mounting plate 421 along the length direction of the first mounting base 42. The first mounting plate 421 is provided with a plurality of first slide rails 4212, the length direction of the first slide rails 4212 is set along the length direction of the first mounting plate 421. The first sliding grooves 4211 and the first slide rails 4212 are arranged one-to-one. The first slide rails 4212 are inserted and engaged with the corresponding first sliding grooves 4211, and the first slide rails 4212 are slidably connected to the inner wall of the first sliding grooves 4211 along their own length direction. A third hydraulic drive component 4213 is provided on the side of the mounting plate 421 facing away from the first roller 41. The third hydraulic drive component 4213 is set along the length direction of the first mounting plate 421. Therefore, by cooperating with the two mounting plates 421, when the first roller 41 is moved between the two mounting plates 421, the axial positioning of the two ends of the first roller 41 can be achieved by the movement of the two mounting plates 421 moving closer to each other.

[0049] Reference Figure 2 and Figure 3A fine-tuning assembly 422 is provided between the mounting plate 421 and the first roller 41. The fine-tuning assembly 422 includes a lifting groove 4221, which is located on the side of the mounting plate 421 facing the first roller 41. The length of the lifting groove 4221 is vertically oriented. A connecting plate 4222 is inserted into the lifting groove 4221 and is slidably connected to the inner wall of the lifting groove 4221 in the vertical direction. The connecting plate 4222 has an insertion hole 4223 on the side facing the first roller 41, which is inserted into the corresponding end of the first roller 41. A fine-tuning drive component 4224 is connected to the connecting plate 4222. The fine-tuning drive component 4224 is a ball screw pair or a hydraulic cylinder and is vertically oriented. Therefore, the fine-tuning component 422 serves two purposes. First, during the installation of the first roller 41, the fine-tuning component 422 positions the insertion hole 4223 and the first roller 41, thereby enabling the first roller 41 to engage with the corresponding insertion hole 4223, facilitating quick installation of the first roller 41. Second, after the first roller 41 is installed and the first auxiliary roller group 4 replaces the first rolling mill group 2, the vertical position of the first roller 41 can be adjusted.

[0050] Reference Figure 2 and Figure 3 A support plate 423 is provided on the upper side of the first mounting base 42. The support plate 423 is located between two mounting plates 421 along the length direction of the first mounting base 42. A lifting drive component 4231 is provided between the support plate 423 and the first mounting base 42. The lifting drive component 4231 is arranged in the vertical direction and is a hydraulic cylinder.

[0051] An arc-shaped support groove 4232 is formed on the side of the support plate 423 facing the first roller 41, and the arc-shaped support groove 4232 extends through the support plate 423 along the length of the first mounting base 42. The inner wall of the arc-shaped support plate 423 fits against the outer wall of the first roller 41. Therefore, when installing the first roller 41, the support plate 423 can lift the first roller 41, so the first roller 41 can be quickly installed by cooperating with the mounting plate 421 and the fine-tuning component 422 on the mounting plate 421.

[0052] Reference Figure 2 and Figure 3A rotating platform 4233 is provided between the support plate 423 and the lifting drive component 4231. The rotating platform 4233 and the support plate 423 are spaced apart or rotatably connected in the vertical direction. A first rotating drive component 4234 is provided between the rotating platform 4233 and the support plate 423. The first rotating drive component 4234 is connected to the rotating platform 4233 and the support plate 423 on both sides of its axial direction, respectively. Therefore, when a new first roller 41 is installed into the first mounting base 42, the first roller 41 can be quickly pushed onto the support plate 423 by rotating the support plate 423. Thus, with the cooperation of the mounting plate 421, the fine-tuning component 422, the first rotating drive component 4234, and the lifting drive component 4231, the rapid positioning and installation of the first roller 41 can be achieved.

[0053] Reference Figure 1 and Figure 3 The first roll group 2 and the first auxiliary roll group 4 have the same structure. Therefore, the first roll group 2 and the first auxiliary roll group 4 can be switched between each other through the first hydraulic drive component 6, so that when the first roll group 2 is worn, the first auxiliary roll group 4 can be switched into place; similarly, when the first auxiliary roll group 4 is worn, the first roll group 2 with a new first roll 41 can be switched into place. Therefore, damaged rolls can be quickly replaced to ensure the normal operation of the rolling mill; and subsequent replacement of damaged rolls can be carried out simultaneously while the rolling mill is operating, thus reducing the impact on the rolling mill and ensuring the production efficiency of the rolling mill.

[0054] Reference Figure 4 The second auxiliary roller group 5 includes a second roller 51 and a second mounting base 52. The axial direction of the second roller 51 is arranged along the length direction of the first mounting base 42. The upper side of the second mounting base 52 is slidably connected to the roller changing frame 1. Two positioning clamps 521 are arranged on the lower side of the second mounting base 52. The two positioning clamps 521 are arranged opposite to each other along the axial direction of the second roller 51. The second roller 51 is located between the two positioning clamps 521 along its own axial direction. The positioning clamps 521 are provided with connecting holes 5211, and the connecting holes 5211 are inserted and engaged with the corresponding ends of the second roller 51.

[0055] The positioning clamp 521 has a plurality of second sliding grooves 5212 on the side facing the second mounting base 52. These second sliding grooves 5212 are spaced apart along the width direction of the second mounting base 52 and extend through the positioning clamp 521 along the length direction of the second mounting base 52. The second mounting base 52 is provided with a plurality of second slide rails 5213, whose length direction is along the length direction of the second mounting base 52. The second sliding grooves 5212 and second slide rails 5213 are arranged in a one-to-one correspondence. The second slide rails 5213 are inserted into and engaged with their corresponding second sliding grooves 5212, and the second slide rails 5213 slide slidably connect to the inner wall of the second sliding groove 5212 along their own length direction. A fourth hydraulic drive component 5214 is provided on the side of the positioning clamp 521 facing away from the second roller 51, and this fourth hydraulic drive component 5214 is arranged along the length direction of the second mounting plate 421. Therefore, by cooperating with the two positioning clamps 521, when the second roller 51 is moved between the two positioning clamps 521, the two mounting plates 421 can be moved closer to each other to achieve the positioning of the two ends of the second roller 51 in the axial direction.

[0056] Reference Figure 1 Vertically, the first roll group 2 and the second roll group 3 are arranged facing each other. Horizontally, the first auxiliary roll group 4 and the second auxiliary roll group 5 are located on opposite sides of the length of the first roll group 2. Therefore, under the action of the first hydraulic drive unit 6 and the second drive unit, when the first auxiliary roll group and the second auxiliary roll group 5 are arranged facing each other vertically, the upper space of the first roll group 2 facilitates the replacement of the first roll 41 with a new first roll, while the lower space of the second roll group 3 facilitates the replacement of the second roll 51 with a new second roll.

[0057] The second auxiliary roll group 5 has the same structure as the second roll group 3. Therefore, it is convenient to replace the second auxiliary roll group 5 with the second roll group 3.

[0058] Reference Figure 5 and Figure 6 Two auxiliary roll changing assemblies 8 are provided on the roll changing frame 1. The two auxiliary roll changing assemblies 8 are spaced apart along the length direction of the first roll group 2. One auxiliary roll changing assembly 8 is spaced apart from the second auxiliary roll group 5 in the vertical direction, and the other auxiliary roll changing assembly 8 is directly opposite the first auxiliary roll group 4 in the horizontal direction.

[0059] Reference Figure 6 and Figure 7The auxiliary roller changing assembly 8 includes a base plate 81. Gripping plates 82 are spaced apart on the upper side of the base plate 81, and arc-shaped gripping grooves 821 are formed on the gripping plates 82, extending through the gripping plates 82 along their length. A lifting plate 83 is located below the gripping plates 82. A second rotary drive component 84 is positioned between the gripping plates 82 and the lifting plate 83, with its axial ends connected to both the gripping plates 82 and the lifting plate 83 respectively. The second rotary drive component 84 is a rotary hydraulic cylinder. Several lifting drive components 85 are located below the lifting plate 83, arranged vertically. The lifting drive components 85 are hydraulic cylinders, and their lower ends are connected to the base plate 81.

[0060] Reference Figure 5 and Figure 6 The base plate 81 and the roll changing frame 1 are spaced apart on the lower side. A guide post 86 is provided on the lower side of the base plate 81, with the axial direction of the guide post 86 along the width direction of the first roll. A guide groove 87 is provided on the side of the roll changing frame 1 facing the base plate 81. The guide groove 87 passes through the roll changing frame 1 along the axial direction of the guide post 86. The guide post 86 and the guide groove 87 are inserted and engaged, and the guide post 86 is slidably connected to the inner wall of the guide groove 87 along its own axial direction. A roll changing drive component 88 is provided on one side of the base plate 81. The roll changing drive component 88 is a hydraulic cylinder, and its axial direction is along the axial direction of the guide post 86. Both ends of the roll changing drive component 88 are connected to the base plate 81 and the roll changing frame 1, respectively.

[0061] Therefore, the auxiliary roll changing assembly 8 can disassemble the damaged second roll 51 on the second roll group 3 or the second auxiliary roll group 5 by means of the arc-shaped gripping groove 821 on the gripping plate 82, in conjunction with the lifting drive 85 and the roll changing drive 88; on the other hand, it can transport the new second roll 51 into the second roll group 3 or the second auxiliary roll group 5 to assist in the installation of the second roll 51.

[0062] The implementation principle of this application embodiment is as follows: Under normal conditions, the first roll group 2 and the second roll group 3 are arranged facing each other in the vertical direction, thereby enabling the rolling operation of the rolling mill.

[0063] When the first roll 41 in the first roll group 2 or the second roll 51 in the second roll group 3 is damaged, the first hydraulic drive 6 and the second hydraulic drive 7 are activated. At this time, the first auxiliary roll group 4 replaces the first roll group 2, and the second auxiliary roll group 5 replaces the second roll group 3. The cooperation between the first roll 41 in the first auxiliary roll group 4 and the second roll 51 in the second auxiliary roll group 5 can realize the rolling operation.

[0064] While the rolling mill is in operation, the damaged first roll 41 and the damaged second roll 51 are replaced simultaneously.

[0065] The replacement steps for the first roll 41 are as follows: First, the support plate 423 in the first roll group 2 rises, supporting the first roll 41. The two mounting plates 421 move away from the first roll 41, allowing the damaged first roll 41 to be disassembled. After disassembly, the support plate 423 is rotated 90 degrees. At this point, a multi-stage hydraulic cylinder contacts one end of the first roll 41, pushing the first roll 41 out of the support plate 423, thus completely disassembling the damaged first roll 41. Then, a new first roll 41 is pushed axially onto the support plate 423. The support plate 423 rotates, and through the cooperation of the fine-tuning component 422, the mounting plate 421, and the lifting drive component 4231, the new first roll 41 is installed between the two mounting plates 421. Therefore, the installation of the new first roll 41 in the first roll group 2 is now complete. Then, after the first roll 41 in the first auxiliary roll group 4 becomes damaged, the first roll group 2 replaces the first auxiliary roll group 4, and the above operation is repeated in the first auxiliary roll group 4.

[0066] The replacement steps for the second roll 51 are as follows: First, the corresponding auxiliary roll changing assembly 8 moves to the lower side of the second roll group 3. Then, the gripping plate 82 is raised and lowered. After the gripping plate 82 supports the second roll 51, the positioning clamps 521 on both sides move away from each other, thus disassembling the second roll 51. Next, the gripping plate 82 is rotated to push the damaged second roll 51 out of the roll changing frame 1 from one end. Then, the new second roll 51 is pushed onto the gripping plate 82. After fixing the second roll 51, the gripping plate 82, through rotation and raising and lowering in conjunction with the two positioning clamps 521, installs the new second roll 51. Finally, the auxiliary roll changing assembly 8 returns to its original position, and the second roll group 3 waits for the second auxiliary roll group 5 to replace the damaged second roll 51.

[0067] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be included within the scope of protection of this application.

Claims

1. A roll changing device for a multi-roll mill, comprising a roll changing frame (1), characterized in that, The roll changing frame (1) is provided with a first roll group (2) and a first auxiliary roll group (4). The length direction of the first roll group (2) is collinear with the length direction of the first auxiliary roll group (4). The first roll group (2) is connected to the first auxiliary roll group (4) on one side along its own length direction. The first roll group (2) and the first auxiliary roll group (4) are slidably connected to the roll changing frame (1) along their own length direction. A first hydraulic drive component (6) is connected to the first roll group (2). The first roll group (2) is vertically mounted with a second roll group (3). A second auxiliary roll group (5) is connected to one side of the second roll group (3) along its length direction. The length direction of the second auxiliary roll group (5) is collinear with the length direction of the second roll group (3). The second roll group (3) and the second auxiliary roll group (5) are slidably connected to the roll changing frame (1) along their own length direction. A second hydraulic drive component (7) is connected to the second roll group (3). The first auxiliary roller group (4) includes a first roller (41) and a first mounting base (42). The first mounting base (42) is provided with two mounting plates (421). The two mounting plates (421) are arranged opposite each other along the axial direction of the first roller (41). The mounting plates (421) are provided with insertion holes (4223). The insertion holes (4223) are inserted into one end of the first roller (41), and the first roller (41) is rotatably connected to the inner wall of the insertion holes (4223). The mounting plates (421) are slidably connected to the first mounting base (42) along the axial direction of the first roller (41). A third hydraulic drive component (4213) is connected to the mounting plates (421). A support plate (423) is provided on the upper side of the first mounting base (42) at intervals. The support plate (423) is located between two mounting plates (421). A lifting drive member (4231) is provided between the support plate (423) and the first mounting base (42). The driving direction of the lifting drive member (4231) is arranged along the interval direction between the support plate (423) and the first mounting base (42). A rotating platform (4233) is provided between the support plate (423) and the lifting drive (4231). The rotating platform (4233) is rotatably connected to the support plate (423). A first rotating drive (4234) is provided on the rotating platform (4233). The first rotating drive (4234) is connected to the support plate (423) and the rotating platform (4233) on both sides of its axial direction.

2. The roll changing device for a multi-roll mill according to claim 1, characterized in that, The first roll group (2) and the second roll group (3) are arranged facing each other in the vertical direction, and the first auxiliary roll group (4) and the second auxiliary roll group (5) are located on both sides of the length direction of the first roll group (2).

3. The roll changing device for a multi-roll mill according to claim 1, characterized in that, The support plate (423) has an arc-shaped support groove (4232) on the side facing the first roller (41), and the arc-shaped support groove (4232) passes through the support plate (423) along the axial direction of the first roller (41).

4. A roll changing device for a multi-roll mill according to claim 1, characterized in that, The first roll group (2) has the same structure as the first auxiliary roll group (4).

5. A roll changing device for a multi-roll mill according to claim 1, characterized in that, A fine-tuning component (422) is provided on the side of the mounting plate (421) facing the first roller (41). The fine-tuning component (422) includes a lifting groove (4221). The lifting groove (4221) is opened on the side of the mounting plate (421) facing the first roller (41). A connecting plate (4222) is inserted into the lifting groove (4221). The connecting plate (4222) is slidably connected to the inner wall of the lifting groove (4221) in the vertical direction. A fine-tuning drive (4224) is connected to the connecting plate (4222). The driving direction of the fine-tuning drive (4224) is set in the vertical direction. The insertion hole (4223) is formed on the connecting plate (4222).

6. A roll changing device for a multi-roll mill according to claim 1, characterized in that, The roll changing frame (1) is provided with two auxiliary roll changing assemblies (8), and the two auxiliary roll changing assemblies (8) are arranged at intervals on both sides of the first roll group (2) along the length direction of the first roll group (2); The auxiliary roll changing assembly (8) includes a base plate (81), which is slidably connected to the roll changing frame (1). A roll changing drive (88) is connected to the base plate (81), and the driving direction of the roll changing drive (88) is set in the horizontal direction and perpendicular to the length direction of the first roll group (2). A gripping plate (82) is provided on the base plate (81), and a lifting drive (85) is provided between the gripping plate (82) and the base plate (81). The two ends of the lifting drive (85) are respectively connected to the gripping plate (82) and the base plate (81).

7. A roll changing device for a multi-roll mill according to claim 6, characterized in that, A lifting plate (83) is provided between the gripping plate (82) and the lifting drive (85). The lifting plate (83) is rotatably connected to the gripping plate (82). A second rotation drive (84) is provided between the lifting plate (83) and the gripping plate (82). The second rotation drive (84) is axially connected to the gripping plate (82) and the lifting plate (83) on both sides respectively.

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