Novel roll changing device of four-roll mill

Abstract

The utility model relates to a novel four-roll mill roll changing device which comprises a four-roll mill roll changing device and a roll changing device outer frame located outside the four-roll mill roll changing device, the four-roll mill roll changing device comprises a replaceable working roll and a replaceable supporting roll, a fixed roll way is further fixedly installed on the roll changing device outer frame, a roll changing trolley is arranged on the fixed roll way, and the roll changing trolley is connected with the working roll and the supporting roll. A roller changing platform and a hook piece located on the roller changing platform are arranged outside the roller changing trolley, and a lifting device is further arranged on the roller changing trolley and comprises a platform lifting oil cylinder located on the trolley body. Compared with a traditional roll changing mechanism, the novel roll changing device of the four-roll mill combines roll changing of the supporting roll and roll changing of the working roll, roll changing traction uses the same power, a roll changing trolley track is shared, compared with a traditional roll changing trolley, the novel roll changing device of the four-roll mill is more compact in structure, more reasonable in space utilization and simple in structure, manufacturing cost can be reduced, and meanwhile the problems that a small workshop is small in space and inconvenient to use are solved. And raw material transferring and worker passing are inconvenient.

Description

Technical Field

[0001] The present application relates to the technical field of roll changing for four-roller rolling mills, and in particular to a novel roll changing device for a four-roller rolling mill. Background Art

[0002] The replaceable rolls of the four-high mill mainly include two parts, namely the support roll and the working roll. The working roll and the support roll are arranged up and down in the arch of the four-high mill. At present, the roll change mainly adopts the form of independent layout of the support roll and the working roll, which requires two sets of power and two sets of moving tracks. Therefore, the entire roll change mechanism takes up more space and has higher manufacturing costs.

[0003] At the same time, since the traditional four-roller rolling mill roll changing device involves two independent tracks, its overall volume is large, which results in the presence of a pit on the operating side of the rolling mill, making it inconvenient for workers and materials to pass through, making the research and development of a new four-roller rolling mill roll changing device very necessary. A new four-roller rolling mill roll changing device is proposed to solve the above-mentioned problems. Utility Model Content

[0004] In response to the shortcomings of the prior art, the present application provides a new type of four-roll mill roll changing device, which has the advantages of combining support roll changing with working roll changing, using the same power for roll changing traction, and sharing the roll changing vehicle track. Compared with traditional roll changing vehicles, it has a more compact structure and lower cost.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a novel four-roll mill roll changing device, comprising a four-roll mill roll changing device and a roll changing device outer frame located outside the four-roll mill roll changing device, the four-roll mill roll changing device comprising replaceable working rolls and support rolls, a fixed roller table is also fixedly installed on the roll changing device outer frame, and a roll changing vehicle is arranged on the fixed roller table;

[0006] The roll-changing vehicle is provided with a roll-changing platform and a hook member on the roll-changing platform. The roll-changing vehicle is also provided with a lifting device, and the lifting device includes a platform lifting cylinder on the roll-changing vehicle, and a piston rod of the platform lifting cylinder is fixedly connected to the roll-changing platform.

[0007] A roll-changing vehicle traction structure is also provided on the roll-changing device outer frame, and the roll-changing vehicle traction structure includes a roll-changing vehicle traction cylinder fixedly mounted on the roll-changing device outer frame, and a support fixedly connected to the roll-changing device outer frame is fixedly mounted outside the cylinder body of the roll-changing vehicle traction cylinder.

[0008] Furthermore, the roll-changing vehicle comprises a vehicle body slidably mounted on the fixed roller track, wheels fixed under the vehicle body, and a connecting chain connected between the vehicle body and an outer frame of the roll-changing device.

[0009] Furthermore, the lifting device also includes a lifting guide rod fixed below the roller changing platform, and the lifting guide rods are at least four and are arranged in a rectangular array outside the platform lifting cylinder.

[0010] Furthermore, a sliding cover plate is provided on the roll changing platform, the hook member is located on the sliding cover plate, the sliding cover plate includes a movable cover plate and a roll changing cylinder connected to the movable cover plate, the roll changing cylinder fixes its cylinder body to the roll changing platform through an external bracket, and the piston rod head of the roll changing cylinder is fixedly connected to the movable cover plate.

[0011] Furthermore, the hook member includes a working roll hook, a snap-fit ​​hook that snaps onto the working roll hook, and a secondary hook located outside the four-roll mill roll changer, wherein the working roll hook is fixedly installed at the end position of the movable cover plate, the snap-fit ​​hook extends to the outside of the working roll and the support roll, and the snap-fit ​​hook and the working roll hook face each other.

[0012] Furthermore, the hook member also includes a support roller hook fixedly mounted on the end of the vehicle body, and the support roller hook is also buckled with the buckling hook.

[0013] Furthermore, the upper portion of the end of the roll changing device outer frame away from the roll changing of the four-roller rolling mill also has a fixed cover plate.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] Compared with the traditional roll changing mechanism, this new four-roll mill roll changing device combines the support roll changing with the working roll changing. The roll changing traction uses the same power and the roll changing vehicle tracks are shared. Compared with the traditional roll changing vehicle, it has a more compact structure, more reasonable space utilization and simple structure, which can reduce manufacturing costs and solve the problems of small space in small factories, inconvenient raw material transportation and workers' passage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the working roll changing working condition in this application;

[0017] Figure 2 For this application Figure 1 A magnified view of the structure at center A;

[0018] Figure 3 For this application Figure 1 Cross-sectional view at AA in the middle;

[0019] Figure 4 This is a schematic diagram of the support roller changing working condition structure of this application.

[0020] In the figure: 1. roll changing of four-roll mill; 101. support roll; 102. working roll; 2. outer frame of roll changing device; 3. fixed roller table; 4. car body; 5. traction cylinder of roll changing car; 6. support; 7. connecting chain; 8. platform lifting cylinder; 9. lifting guide rod; 10. roll changing platform; 11. roll changing cylinder; 12. fixed cover plate; 13. movable cover plate; 14. insertion pipe; 15. working roll hook; 16. snap hook; 17. auxiliary hook; 18. support roll hook. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] See also Figure 1-4 In this embodiment, a novel four-roll mill roll changing device comprises a four-roll mill roll changing device 1 and a roll changing device outer frame 2 located outside the four-roll mill roll changing device 1, wherein the roll changing device outer frame 2 is directly connected to the factory building foundation for stability, and the four-roll mill roll changing device 1 comprises replaceable working rolls 102 and support rolls 101.

[0023] Preferably, a fixed roller table 3 is fixedly mounted on the outer frame 2 of the roller changing device, a roller changing vehicle is arranged on the fixed roller table 3, and a roller changing platform 10 and a hook member located on the roller changing platform 10 are arranged outside the roller changing vehicle.

[0024] In a specific implementation, the hook member on the roll changing platform 10 can be used to pull the working roll 102 and the support roll 101 to the outside of the arch of the four-roller machine 1 to complete the roll changing.

[0025] The roller changing vehicle is also provided with a lifting device.

[0026] In this design, since the roll changing car is directly located on one side of the roll changing 1 of the four-high rolling mill, it can complete the roll changing of the working rolls 102 and the support rolls 101 distributed up and down in the lifting state.

[0027] In this embodiment, the roller changing vehicle comprises a vehicle body 4 slidably mounted on a fixed roller table 3 , wheels fixed under the vehicle body 4 , and a connecting chain 7 connected between the vehicle body 4 and an outer frame 2 of the roller changing device.

[0028] In a specific embodiment, the wheels are in contact with the fixed roller table 3 to roll, so that the vehicle body 4 can be movably adjusted along the horizontal direction of the fixed roller table 3, that is, relative to the position of the roll changer 1 of the four-high rolling mill.

[0029] The lifting device in this embodiment includes a platform lifting cylinder 8 located on the vehicle body 4, wherein the cylinder body of the platform lifting cylinder 8 is fixedly connected to the vehicle body 4, and the piston rod of the platform lifting cylinder 8 is fixedly connected to the roller changing platform 10;

[0030] It also includes a lifting guide rod 9 fixed under the roller changing platform 10. There are at least four lifting guide rods 9 arranged in a rectangular array outside the platform lifting cylinder 8, ensuring that the roller changing platform 10 can be lifted and lowered stably and reliably.

[0031] The lifting and lowering of the roller changing platform 10 relative to the vehicle body 4 is controlled by the platform lifting cylinder 8 .

[0032] In order to facilitate docking when changing rolls, a sliding cover plate is provided on the roll changing platform 10 in this embodiment, and the hook member is located on the sliding cover plate. The sliding cover plate includes a movable cover plate 13 and a roll changing cylinder 11 connected to the movable cover plate 13. The roll changing cylinder 11 fixes its cylinder body on the roll changing platform 10 through an external bracket, and the piston rod head of the roll changing cylinder 11 is fixedly connected to the movable cover plate 13.

[0033] In a specific embodiment, the roll-changing cylinder 11 is actuated to drive the movable cover plate 13 to move relative to the roll-changing platform 10 so as to remove the traction working roll 102 or the support roll 101 .

[0034] In this embodiment, the hook member includes a working roll hook 15, a snap-fitting hook 16 snapped onto the working roll hook 15, and a secondary hook 17 located outside the four-roll mill roll changer 1, wherein the working roll hook 15 is fixedly installed at the end position of the movable cover plate 13, the snap-fitting hook 16 extends to the outside of the working roll 102 and the support roll 101, and the snap-fitting hook 16 and the working roll hook 15 face each other.

[0035] Such design enables the buckling hook 16 to buckle with the working roller hook 15, and cooperates with the lifting device to enable the buckling hook 16 to complete the fit with the working roller hook 15 upwards.

[0036] It should be noted that a penetration tube 14 is fixedly installed at the position where the buckle hook 16 is connected to the roller changing platform 10 to strengthen the connection strength of the bolt connection.

[0037] In this embodiment, the outer frame 2 of the roll changing device further comprises a fixed cover plate 12 on the upper part of one end away from the roll changing device 1 of the four-roller rolling mill. The fixed cover plate 12 is built into the roll changing tunnel and is used to provide passage for trucks and workers.

[0038] In order to achieve traction of the roll changing car, a roll changing car traction structure is also provided on the roll changing device outer frame 2 in this embodiment. The roll changing car traction structure includes a roll changing car traction cylinder 5 fixedly installed on the roll changing device outer frame 2. A support 6 fixedly connected to the roll changing device outer frame 2 is fixedly installed outside the cylinder body of the roll changing car traction cylinder 5. Through the connection with the support 6, the piston rod of the roll changing car traction cylinder 5 is fixedly connected to the car body 4.

[0039] In a specific embodiment, the vehicle body 4 can be moved by pushing and pulling the traction cylinder 5 of the roller-changing vehicle.

[0040] In this embodiment, the hook member further includes a support roller hook 18 fixedly mounted on the end of the vehicle body 4 , and the support roller hook 18 is also buckled with the buckling hook 16 to complete the traction of the support roller 101 .

[0041] In order to ensure stability after roll replacement, the support roll 101 and the working roll 102 are locked in the four-high rolling mill through a locking device, wherein the locking device uses a conventional positioning pin structure.

[0042] The working principle of the above embodiment is:

[0043] When the support roller 101 is changed, the platform lifting cylinder 8 is retracted, so that the roll-changing platform 10 falls to the height position corresponding to the support roller 101, the roll-changing position locking device is opened, and the piston rod of the roll-changing vehicle traction cylinder 5 is retracted. The traction cylinder 5 of the roll-changing vehicle drives the vehicle body 4 to travel along the fixed roller table 3, and then the support roller hook 18 at the end of the vehicle body 4 cooperates with the buckle hook 16 on the bearing seat of the support roller 102, and the two are firmly matched by inserting the latch, and then the traction cylinder 5 of the roll-changing vehicle is controlled, and the piston rod of the traction cylinder 5 of the roll-changing vehicle is extended, so that The car body 4 pulls the bearing seat of the support roller 102 out of the rolling mill arch to complete the roll replacement of the support roller 101; conversely, when a new support roller 101 needs to be installed, the traction cylinder 5 of the roll-changing car moves in the reverse direction to send the new support roller 102 installed on the car body 4 into the designated position in the rolling mill arch; when replacing the upper support roller 101 of the double-layer support roller 101, it is only necessary to place a support frame on the lower support roller 101, and the upper support roller 101 falls on the support frame, and repeat the roll replacement steps of the lower support roller 101 to achieve the roll replacement of the support roller 101;

[0044] When the working roll 102 is changed, the piston rod of the roll-changing vehicle traction cylinder 5 is fully retracted, the roll-changing position locking device is locked, and the piston rod of the platform lifting cylinder 8 is extended to raise the roll-changing platform 10 to the roll-changing position of the working roll 102. At this time, the working roll hook 15 is connected to the buckling hook 16, and then the roll-changing cylinder 11 drives the working roll hook 15 to pull out the lower working roll 102 connected to the buckling hook 16 through the bearing seat. The reverse movement of the roll-changing cylinder 11 can send the new roll replaced on the roll-changing platform 10 to the specified position in the archway; when the upper working roll 102 is changed, the upper and lower working rolls 102 are connected by a pin shaft, and the roll-changing steps of the lower working roll 102 are repeated, thereby realizing the roll changing of the working roll 102.

[0045] After completing the roll changing work, the platform lifting cylinder 8 descends to the ground level, and the position of the platform lifting cylinder 8 is maintained through the hydraulic system, thereby covering the pit on the operating side of the rolling mill, and materials and workers can pass above.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0047] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A novel four-roller rolling mill roll changing device, comprising a four-roller rolling mill roll changing device (1) and a roll changing device outer frame (2) located outside the four-roller rolling mill roll changing device (1), characterized in that: The four-roller rolling mill roll changer (1) comprises replaceable working rolls (102) and support rolls (101), a fixed roller table (3) is fixedly mounted on the outer frame (2) of the roll changer, and a roll changer is arranged on the fixed roller table (3); The roll-changing vehicle is provided with a roll-changing platform (10) and a hook member located on the roll-changing platform (10). The roll-changing vehicle is also provided with a lifting device, and the lifting device comprises a platform lifting cylinder (8) located on the roll-changing vehicle, and a piston rod of the platform lifting cylinder (8) is fixedly connected to the roll-changing platform (10); A roll-changing vehicle traction structure is also provided on the roll-changing device outer frame (2), and the roll-changing vehicle traction structure comprises a roll-changing vehicle traction cylinder (5) fixedly mounted on the roll-changing device outer frame (2), and a support (6) fixedly connected to the roll-changing device outer frame (2) is fixedly mounted outside the cylinder body of the roll-changing vehicle traction cylinder (5).

2. A novel four-high rolling mill roll changing device according to claim 1, characterized in that: The roller changing vehicle comprises a vehicle body (4) slidably mounted on the fixed roller track (3), wheels fixed below the vehicle body (4), and a connecting chain (7) connected between the vehicle body (4) and an outer frame (2) of the roller changing device.

3. A novel four-high rolling mill roll changing device according to claim 1, characterized in that: The lifting device also includes a lifting guide rod (9) fixed below the roller changing platform (10), and the lifting guide rods (9) are at least four and are arranged in a rectangular array outside the platform lifting cylinder (8).

4. A novel four-high rolling mill roll changing device according to claim 2, characterized in that: The roller changing platform (10) is provided with a sliding cover plate, the hook member is located on the sliding cover plate, the sliding cover plate comprises a movable cover plate (13), and a roller changing cylinder (11) connected to the movable cover plate (13), the roller changing cylinder (11) has its cylinder body fixed to the roller changing platform (10) via an external bracket, and the piston rod head of the roller changing cylinder (11) is fixedly connected to the movable cover plate (13).

5. A novel four-high rolling mill roll changing device according to claim 4, characterized in that: The hook member comprises a working roll hook (15), a snap-fit ​​hook (16) snapped onto the working roll hook (15), and a secondary hook (17) located outside the four-roll mill roll changer (1), wherein the working roll hook (15) is fixedly mounted at an end position of the movable cover plate (13), the snap-fit ​​hook (16) extends to the outside of the working roll (102) and the support roll (101), and the snap-fit ​​hook (16) and the working roll hook (15) face each other.

6. A novel four-high rolling mill roll changing device according to claim 5, characterized in that: The hook member also includes a support roller hook (18) fixedly mounted on the end of the vehicle body (4), and the support roller hook (18) is also buckled with the buckling hook (16).

7. A novel four-high rolling mill roll changing device according to claim 1, characterized in that: The upper part of the roll changing device outer frame (2) away from the four-roller rolling mill roll changing (1) also has a fixed cover plate (12).

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