A high efficiency roll changing device and method for a rolling mill

Abstract

The application discloses a high-efficiency roll changing device for a rolling mill, and belongs to the technical field of roll changing of the rolling mill. The high-efficiency roll changing device for the rolling mill can efficiently change the backup roll of the rolling mill, reduces roll changing time, improves factory production efficiency, and reduces safety hazards.

Description

Technical Field

[0001] This invention belongs to the field of rolling mill roll changing technology, and more specifically, relates to a high-efficiency roll changing device and method for rolling mills. Background Technology

[0002] In existing hot-rolled strip mills, before replacing the support rolls, the transition platform in front of the traverse platform needs to be manually lifted away to make room for the support rolls to move. After the support rolls are replaced, the cover plate also needs to be manually restored to its original position. This method of replacing support rolls not only poses a risk of accidents due to manual operation, but also has low automation, long roll replacement time, low efficiency, increased replacement costs, reduced mill operating time, and reduced plant production efficiency. Summary of the Invention

[0003] To address the aforementioned problems, the present invention provides a high-efficiency roll changing device and method for rolling mills, which can efficiently replace the support rolls of rolling mills, reduce roll changing time, improve factory production efficiency, and reduce safety hazards.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] This invention discloses a high-efficiency roll changing device for a rolling mill, comprising a roll changing bracket, a transition platform, a support, and a transverse platform. The roll changing bracket and the transition platform are connected by a connector. The transition platform is slidably mounted on the support, which has a receiving space for accommodating the roll changing bracket. The transverse platform is located behind the free end of the transition platform, and a transition platform storage position is provided on the transverse platform. The top surface of the transition platform storage position is not higher than the bottom surface of the transition platform.

[0006] Furthermore, the connecting member is a connecting rod, and the two ends of the connecting rod are respectively connected to the roller changing bracket and the connecting end of the transition platform.

[0007] Furthermore, the support includes opposing pillars, with opposing first slide rails at their upper ends, and the transition platform is provided with a slider that cooperates with the corresponding first slide rail, and the transition platform is slidably disposed on the first slide rail.

[0008] Furthermore, there are multiple support pillars, and all the support pillars are arranged in pairs at the lower ends of the two first slide rails.

[0009] Furthermore, the transition platform storage position is provided with a corresponding second slide rail, and the second slide rail engages with the first slide rail when the transition platform slides.

[0010] Furthermore, the traversing platform is equipped with a traversing hydraulic cylinder for driving the traversing platform to move.

[0011] Furthermore, a support roller replacement hydraulic cylinder is provided below the transverse platform to drive the transition platform to slide on the first slide rail.

[0012] Furthermore, the transverse platform is provided with two work roller storage positions.

[0013] Furthermore, the two work roll storage positions are arranged adjacent to each other.

[0014] A roll changing method for a high-efficiency roll changing device for a rolling mill based on the above structure includes the following steps:

[0015] a. The overhead crane hoists and places the new work roll in a work roll storage position that is offset from the rolling mill;

[0016] b. The work roll push-pull replacement device pulls out the old work roll that needs to be replaced from the mill to the work roll storage position facing the mill;

[0017] c. Activate the lateral hydraulic cylinder to move the lateral platform, so that the second slide rail is connected to the first slide rail;

[0018] d. Activate the hydraulic cylinder for changing the support roll below the transverse platform to pull the roll changing bracket and pull the support roll above the roll changing bracket out of the rolling mill. The transition platform connected to the roll changing bracket via the connecting rod moves synchronously with the roll changing bracket. After the roll changing bracket moves to the position for hoisting the support roll, the transition platform is just placed in the transition platform storage position.

[0019] e. The overhead crane removes the old support roll and then lifts in the new support roll for installation. The hydraulic cylinder for changing the support roll below the transverse platform is activated to push the roll changing bracket and push the new support roll above the roll changing bracket into the rolling mill, thus completing the support roll replacement. At the same time, the transition platform moves synchronously with the roll changing bracket, and the transition platform returns to the top of the support.

[0020] f. Activate the transverse hydraulic cylinder to drive the transverse platform to move, so that the work roll storage position for storing the new work roll is aligned with the rolling mill;

[0021] g. The work roll push-pull replacement device pushes the new work roll into the rolling mill to complete the work roll replacement. The overhead crane then removes the old work roll from the work roll storage position, completing the entire process of replacing the support roll and the work roll.

[0022] The beneficial effects of this invention are:

[0023] This invention provides a high-efficiency roll changing device for rolling mills. When a support roll needs to be replaced, the work roll is removed and placed on a transverse platform. A transition platform is pushed onto the support and slides towards the transverse platform. The sliding of the transition platform pulls the roll changing bracket towards the support's accommodating space via a connecting member. The support roll on the roll changing bracket and the roll changing bracket move together towards the support's accommodating space. The transition platform slides into its storage position, and the roll changing bracket and support roll are located within the support's accommodating space. The support roll is then lifted out and replaced with a new one. The transition platform is then pushed in the opposite direction onto the support and slides towards the rolling mill. The reverse sliding of the transition platform pushes the roll changing bracket towards the rolling mill for installation and resetting via the connecting member. A new work roll is then installed, completing the roll changing process. The roll changing process does not require lifting the transition platform, avoiding damage to surrounding personnel or equipment caused by the platform falling or shaking during lifting, and reducing safety hazards during the roll changing process. With this high-efficiency roll changing device for rolling mills, operators can change rolls efficiently and safely, reducing roll changing time, improving roll changing efficiency, reducing roll changing costs, increasing rolling mill operating time, and improving production efficiency, thereby increasing factory profits. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a simplified schematic diagram of the structure of a transition platform located on a support for a high-efficiency roll changing device for a rolling mill, as described in the embodiment.

[0026] Figure 2 yes Figure 1 Sectional view of AA;

[0027] Figure 3 This is a simplified schematic diagram of the structure of a high-efficiency roll changing device for a rolling mill located at the transfer platform storage position, as described in the embodiment.

[0028] Figure 4 yes Figure 3 Sectional view of BB;

[0029] Figure 5 This is a simplified schematic diagram of the transverse platform in the embodiment.

[0030] Reference numerals: 1. Roller changing bracket; 2. Support roller; 3. Working roller; 4. Transition platform; 5. Transition platform storage position; 501. Working roller storage position; 502. Support column; 6. First slide rail; 7. Connecting rod; 8. Second slide rail; 9. Transition hydraulic cylinder; 10. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, this embodiment provides a high-efficiency roll changing device for a rolling mill, including a roll changing bracket 1, a transition platform 4, a support, and a transverse platform 5. The roll changing bracket 1 and the transition platform 4 are connected by a connector. The transition platform 4 is slidably mounted on the support. The support has a receiving space to accommodate the roll changing bracket 1 and the support roll 2. The transverse platform 5 is located behind the free end of the transition platform 4. The transverse platform 5 is provided with a transition platform storage position 501. The top surface of the transition platform storage position 501 is not higher than the bottom surface of the transition platform 4.

[0034] Based on the above-described high-efficiency roll changing device for rolling mills, when the support roll 2 needs to be replaced, the work roll 3 is removed and placed in the corresponding storage position on the transverse platform 5. The transition platform 4 is pushed to slide on the support towards the transverse platform 5. The transition platform 4 slides and pulls the roll changing bracket 1 towards the support's accommodating space via the connecting piece. The support roll 2 located on the roll changing bracket 1 and the roll changing bracket 1 move together towards the support's accommodating space. The transition platform 4 slides into the transition platform storage position 501. The roll changing bracket 1 and the support roll 2 are located within the support's accommodating space. The old support roll 2 is lifted out and replaced with a new support roll 2. The transition platform 4 is pushed in the opposite direction and slides towards the rolling mill on the support. The transition platform 4 slides in the opposite direction and pushes the roll changing bracket 1 towards the rolling mill for installation and resetting via the connecting piece. The replacement of the support roll 2 is completed, and the new work roll 3 is installed, completing the entire roll changing process. The roll changing process does not require lifting the transition platform 4, avoiding damage to surrounding personnel or equipment caused by the transition platform 4 falling off or shaking during the lifting process, and reducing the safety hazards in the roll changing process. With the high-efficiency roll changing device for rolling mills disclosed in this application, operators can change rolls efficiently and safely, reducing roll changing time, improving roll changing efficiency, reducing roll changing costs, increasing rolling mill operating time, and improving production efficiency, thereby increasing factory profits. The top surface of the transition platform storage position 501 is at the same height as the bottom surface of the transition platform 4, facilitating the smooth sliding of the transition platform 4 into or out of the transition platform storage position 501.

[0035] Specifically, the connecting component is a connecting rod 8, and the two ends of the connecting rod 8 are fixedly connected to the roller changing bracket 1 and the connecting end of the transition platform 4, respectively.

[0036] The roller changing bracket 1 and the transition platform 4 are fixedly connected by a connecting rod 8 (such as bolted connection or hinge), which facilitates the roller changing bracket 1 to push the transition platform 4.

[0037] The bracket includes opposing support columns 6, with opposing first slide rails 7 at their upper ends. The transition platform 4 is provided with a slider that cooperates with the corresponding first slide rail 7, and the transition platform 4 is slidably mounted on the first slide rail 7.

[0038] A channel is formed between the opposing support columns 6, within which the roller changer 1 moves. The channel serves as a accommodating space. Two opposing first slide rails 7 are provided along the length of the transition platform 4 from the opposing support columns 6. Slider blocks that mate with the corresponding first slide rails 7 are provided on both sides of the transition platform 4 along its length. The transition platform 4 is secured between the opposing first slide rails 7 by the sliders on both sides. The number of support columns 6 can be two, four, six, or more, and they are evenly distributed opposite each other on both sides. An installation beam is provided at the upper end of each support column 6 along the length of the transition platform 4, and the first slide rails 7 are mounted on the installation beam.

[0039] Preferably, there are multiple support pillars 6, and all the support pillars 6 are arranged in pairs at the lower ends of the two first slide rails 7.

[0040] The number of support columns 6 is multiple, such as six, arranged in three pairs of two columns each, positioned opposite each other at the lower end of the two mounting beams. Three support columns 6 are evenly distributed at the lower end of each mounting beam. These multiple support columns 6 provide a more stable support for the mounting beams and the first slide rail 7.

[0041] Preferably, the transition platform storage position 501 is provided with a corresponding second slide rail 9, and the second slide rail 9 engages with the first slide rail 7 when the transition platform 4 slides.

[0042] The second slide rail 9 on the transition platform storage position 501 is connected to the first slide rail 7, so that the transition platform 4 can slide into or out of the transition platform storage position 501 more smoothly.

[0043] Preferably, the transverse platform 5 is provided with a transverse hydraulic cylinder 10 for driving the transverse platform 5 to move.

[0044] The lateral hydraulic cylinder 10 drives the lateral platform 5 to move laterally, causing the lateral platform 5 to move vertically relative to the first slide rail 7. A third slide rail is set at the rear end of the support (near the end of the lateral platform 5), and the lateral platform 5 is equipped with a slider that cooperates with the third slide rail. The lateral hydraulic cylinder 10 drives the lateral platform 5 to slide on the third slide rail to achieve lateral movement. The lateral movement of the lateral platform 5 driven by the lateral hydraulic cylinder 10 facilitates the docking of the second slide rail 9 with the first slide rail 7, and also allows the lateral platform 5 to move laterally to a nearby location when it is necessary to place or pick up the work roller 3, making it convenient to replace the work roller 3.

[0045] Below the transverse platform 5 is a hydraulic cylinder for changing support rollers, which drives the transition platform 4 to slide on the first slide rail 7.

[0046] The pressure rod of the support roller replacement hydraulic cylinder is fixedly connected to the roller changing bracket 1. When the support roller needs to be replaced, the support roller replacement hydraulic cylinder is activated to pull the roller changing bracket 1. The roller changing bracket 1 pushes the transition platform 4 to slide on the first slide rail 7 via the connecting rod 8. Conversely, the support roller replacement hydraulic cylinder pushes the roller changing bracket 1, and the roller changing bracket 1 pulls the transition platform 4 to slide on the first slide rail 7 via the connecting rod 8, making roller changing more labor-saving and automated. The transition platform 4 slides into the transition platform storage position 501, and the sliding hydraulic cylinder acts as a limit, restricting the movement of the transition platform 4.

[0047] The transverse platform 5 is provided with two work roller storage positions 502.

[0048] Two work roll storage positions 502 are provided. One work roll storage position 502 is used to place new work rolls, and the other work roll storage position 502 is used to store old work rolls that have been removed, which brings convenience to the replacement of work rolls.

[0049] The two working roller storage positions 502 are arranged adjacent to each other.

[0050] The work roll storage positions 502 are arranged adjacent to each other, which facilitates quick repositioning when the work rolls are replaced.

[0051] A roll changing method for a high-efficiency roll changing device for a rolling mill based on the above structure includes the following steps:

[0052] a. The overhead crane hoists the new work roll 3 and places it on the work roll storage position 502, which is offset from the rolling mill;

[0053] b. The work roll push-pull replacement device pulls out the old work roll 3 that needs to be replaced in the mill and onto the work roll storage position 502 facing the mill.

[0054] c. Activate the transverse hydraulic cylinder 10 to drive the transverse platform 5 to move, so that the second slide rail 9 docks with the first slide rail 7;

[0055] d. Start the hydraulic cylinder for changing the support roll below the transverse platform 5 to pull the roll changing bracket 1 and pull the support roll 2 above the roll changing bracket 1 out of the rolling mill. The transition platform 4, which is connected to the roll changing bracket 1 through the connecting rod 8, moves synchronously with the roll changing bracket 1. After the roll changing bracket 1 moves to the position for hoisting the support roll 2, the transition platform 4 is just placed in the transition platform storage position 501.

[0056] e. The overhead crane removes the old support roll 2, and then lifts in the new support roll 2. The hydraulic cylinder for changing the support roll under the transverse platform 5 is activated to push the roll changing bracket 1 to push the new support roll 2 above the roll changing bracket 1 into the rolling mill, thus completing the replacement of the support roll 2. At the same time, the transition platform 4 moves synchronously with the roll changing bracket 1, and the transition platform 4 returns to the top of the support.

[0057] f. Start the transverse hydraulic cylinder 10 to drive the transverse platform 5 to move, so that the work roll storage position 502 for storing the new work roll 3 is aligned with the rolling mill;

[0058] g. The work roll push-pull replacement device pushes the new work roll 3 into the rolling mill to complete the replacement of the work roll 3. The overhead crane lifts away the old work roll on the work roll storage position 502, completing the entire replacement process of the support roll 2 and the work roll 3.

[0059] A roll changing method for a high-efficiency roll changing device for a rolling mill based on the above structure involves the following steps: When replacing the support roll 2, a gantry crane is used to hoist the new work roll 3 and place it on the work roll storage position 502, which is offset from the rolling mill. A work roll push-pull replacement device pulls the old work roll 3, which needs to be replaced, out of the rolling mill and onto the work roll storage position 502 facing the rolling mill, completing the disassembly of the work roll 3. A transverse hydraulic cylinder 10 is activated to move the transverse platform 5, causing the second slide rail 9 to align with the first slide rail 7. A support roll replacement hydraulic cylinder below the transverse platform 5 is activated to pull the roll changing bracket 1, pulling the support roll 2 above the roll changing bracket 1 out of the rolling mill. The roll changing bracket 1 pushes the transition platform 4, connected to the roll changing bracket 1 via a connecting rod 8, to move synchronously with the roll changing bracket 1. After the roll changing bracket 1 reaches the position where the support roll 2 is hoisted, the transition platform 4... The old support roll 2 is stored in storage position 501 on the transition platform. A crane lifts away the disassembled old support roll 2, and then lifts in the new support roll 2. The hydraulic cylinder for changing the support roll 2 below the transverse platform 5 is activated, pushing the roll changing bracket 1 to push the new support roll 2 above the roll changing bracket 1 into the rolling mill, completing the replacement and installation of the support roll 2. Simultaneously, the roll changing bracket 1 pulls the transition platform 4 through the connecting rod 8, moving it synchronously (in the same direction) with the roll changing bracket 1, and the transition platform 4 returns to its position above the support. The transverse hydraulic cylinder 10 is activated, driving the transverse platform 5 to move, aligning the work roll storage position 502 (where the new work roll 3 is stored) directly with the rolling mill. The work roll push-pull replacement device pushes the new work roll 3 into the rolling mill, completing the replacement and installation of the work roll 3. The crane lifts away the old work roll from the work roll storage position 502, ending the entire replacement process of the support roll 2 and work roll 3. This reduces the safety hazards associated with lifting the transition platform 4. Operators can efficiently and safely change support rolls 2 and work rolls 3, reducing roll changing time, improving roll changing efficiency, reducing roll changing costs, increasing mill working time, and improving production efficiency, thereby increasing factory profits. The work roll push-pull replacement device is an electric trolley or a hydraulic cylinder. A track is installed on the transition platform 4. In step b, the old work roll 3 is hung on the electric trolley. The lateral hydraulic cylinder 10 is activated, driving the lateral platform 5 to move, aligning the track with the empty work roll storage position 502. The electric trolley pulls the work roll 3 from the track on the transition platform 4 to the empty work roll storage position 502. In step g, the lateral hydraulic cylinder 10 is activated, driving the lateral platform 5 to move, aligning the track with the work roll storage position 502 for the new work roll. The electric trolley pushes the new work roll 3 into the mill.

[0060] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-efficiency roll changing device for a rolling mill, characterized in that, The system includes a roller changer (1), a transition platform (4), a support, and a transverse platform (5). The roller changer (1) and the transition platform (4) are connected by a connector. The transition platform (4) is slidably mounted on the support. The support has a space for accommodating the roller changer (1). The transverse platform (5) is located behind the free end of the transition platform (4). The transverse platform (5) has a transition platform storage position (501). The top surface of the transition platform storage position (501) is not higher than the bottom surface of the transition platform (4).

2. The high-efficiency roll changing device for a rolling mill according to claim 1, characterized in that, The connecting component is a connecting rod (8), and the two ends of the connecting rod (8) are respectively connected to the connecting ends of the roller changing bracket (1) and the transition platform (4).

3. A high-efficiency roll changing device for a rolling mill according to claim 2, characterized in that, The support includes opposing pillars (6), with opposing first slide rails (7) at their upper ends. The transition platform (4) is provided with a slider that cooperates with the corresponding first slide rail (7), and the transition platform (4) is slidably disposed on the first slide rail (7).

4. A high-efficiency roll changing device for a rolling mill according to claim 3, characterized in that, The number of the support pillars (6) is multiple, and all the support pillars (6) are arranged in pairs at the lower ends of the two first slide rails (7).

5. A high-efficiency roll changing device for a rolling mill according to claim 4, characterized in that, The transition platform storage position (501) is provided with a corresponding second slide rail (9), and when the transition platform (4) slides, the second slide rail (9) docks with the first slide rail (7).

6. A high-efficiency roll changing device for a rolling mill according to claim 5, characterized in that, The transverse platform (5) is equipped with a transverse hydraulic cylinder (10) for driving the transverse platform (5) to move.

7. A high-efficiency roll changing device for a rolling mill according to claim 6, characterized in that, Below the transverse platform (5) is a hydraulic cylinder for changing support rollers, which drives the transition platform (4) to slide on the first slide rail (7).

8. A high-efficiency roll changing device for a rolling mill according to claim 7, characterized in that, The transverse platform (5) is provided with two work roller storage positions (502).

9. A high-efficiency roll changing device for a rolling mill according to claim 8, characterized in that, The two work roll storage positions (502) are arranged adjacent to each other.

10. A roll changing method having the high-efficiency roll changing device for a rolling mill as described in claim 9, characterized in that, Includes the following steps: a. The overhead crane hoists the new work roll (3) and places it in the work roll storage position (502) that is offset from the rolling mill; b. The work roll push-pull replacement device pulls out the old work roll (3) that needs to be replaced in the mill to the work roll storage position (502) facing the mill; c. Start the transverse hydraulic cylinder (10) to drive the transverse platform (5) to move, so that the second slide rail (9) docks with the first slide rail (7); d. Start the hydraulic cylinder for changing the support roll below the transverse platform (5) to pull the roll changing bracket (1) to pull the support roll (2) above the roll changing bracket (1) out of the mill. The transition platform (4) connected to the roll changing bracket (1) via the connecting rod (8) moves synchronously with the roll changing bracket (1). After the roll changing bracket (1) moves to the position for hoisting the support roll (2), the transition platform (4) is just placed in the transition platform storage position (501). e. The overhead crane removes the old support roll (2) and then lifts in the new support roll (2) for installation. The hydraulic cylinder for replacing the support roll under the transverse platform (5) is activated to push the roll changing bracket (1) to push the new support roll (2) above the roll changing bracket (1) into the rolling mill, thus completing the replacement of the support roll (2). At the same time, the transition platform (4) moves synchronously with the roll changing bracket (1), and the transition platform (4) returns to the top of the support. f. Start the transverse hydraulic cylinder (10) to drive the transverse platform (5) to move, so that the work roll storage position (502) for storing the new work roll (3) is directly opposite the rolling mill; g. The work roll push-pull replacement device pushes the new work roll (3) into the rolling mill to complete the replacement of the work roll (3). The crane lifts away the old work roll on the work roll storage position (502) to complete the entire replacement process of the support roll (2) and the work roll (3).

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