Four-roller mill
By introducing a lifting structure into the four-roll rolling mill, the problem of low maintenance efficiency of traditional rolling mills is solved, and more efficient equipment replacement and maintenance is achieved.
Patent Information
- Application Number
- CN202422244188.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-09-12
AI Technical Summary
During the production process of traditional rolling mills, the replacement and maintenance efficiency of parts such as work rollers, support rollers and lower pads is too low, resulting in a reduced production efficiency.
A four-roll rolling mill is designed, adopting the first lifting structure and the second lifting structure, which are respectively used to lift the working roller structure and the supporting roller structure to form a replacement space, and simplify the disassembly and assembly and maintenance process.
Through the design of the lifting structure, the replacement and maintenance efficiency of work rollers, support rollers and pads is significantly improved, and the production efficiency and equipment reliability are improved.
Smart Images
Figure CN223043318U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rolling mill equipment, in particular to a four-high rolling mill. Background Art
[0002] The description of this part only provides background information related to the disclosure of the utility model, and does not constitute the prior art.
[0003] In the technical field of rolling mill equipment, rolling mills are mainly used to process rolled pieces, causing plastic deformation of the rolled pieces, and are equipment for realizing the metal rolling process. The rolled pieces pass between two rotating work rolls, and the rotating work rolls apply forming pressure to the rolled pieces, thereby realizing the rolling process. Rolling mill equipment is usually shipped to the rolled piece factory by the manufacturer after being packaged. However, during the production process, the work rolls, backup rolls, and lower backing plates of traditional rolling mills are usually worn. It is necessary to stop the machine and disassemble and lift out the lower backup roll in sequence, and then the work roll and the lower backing plate can be disassembled and assembled. The maintenance efficiency and the efficiency of replacing parts are too low.
[0004] It should be noted that the above introduction of the technical background is only for the convenience of clearly and completely explaining the technical solution of the utility model and facilitating the understanding of those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art just because these solutions are described in the background art part of the utility model. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a four-high rolling mill, which solves the problem of too low replacement and maintenance efficiency of work rolls and other workpieces of the rolling mill.
[0006] The above implementation purpose of the utility model is mainly realized by the following technical solutions:
[0007] The utility model provides a four-high rolling mill, including:
[0008] A frame, in which an upper roll section and a lower roll section are provided up and down in the inner cavity of the frame. The lower roll section includes a work roll structure, a backup roll structure, and a backing plate structure that are in contact with each other up and down;
[0009] A first lifting structure is arranged between the work roll structure and the frame. The first lifting structure is used to lift the work roll structure and form a lifting space below the work roll structure;
[0010] A second lifting structure is arranged between the backup roll structure and the frame. The second lifting structure is used to lift the backup roll structure into the lifting space and form a replacement space between the backup roll structure and the backing plate structure for replacing the backing plate structure.
[0011] In a preferred embodiment, the work roll structure includes: a work roll, a work roll bearing housing, and an orbit structure;
[0012] The end of the work roll is rotatably hinged within the work roll bearing housing. The orbit structure is disposed at the bottom of the work roll bearing housing. The orbit structure extends horizontally along the direction from the drive side to the operation side of the frame. The work roll bearing housing can move along the extending direction of the orbit structure. The first lifting structure is provided between the orbit structure and the frame for lifting the orbit structure and forming the lifting space between the work roll bearing housing and the backup roll structure.
[0013] In a preferred embodiment, the orbit structure includes:
[0014] A first orbit and a second orbit. The first orbit and the second orbit are respectively disposed on opposite sides of the frame, and the first orbit and the second orbit are located in the same horizontal plane and are parallel.
[0015] In a preferred embodiment, the first lifting structure includes:
[0016] A plurality of first lifting members, wherein each of the first lifting members is respectively connected between the first orbit and the frame or between the second orbit and the frame.
[0017] In a preferred embodiment, at least one of the first lifting members connecting the first orbit and at least one of the first lifting members connecting the second orbit are disposed near the drive side of the frame;
[0018] And at least one of the first lifting members connecting the first orbit and at least one of the first lifting members connecting the second orbit are disposed near the operation side of the frame.
[0019] In a preferred embodiment, the backup roll structure includes: a backup roll, a backup roll bearing housing;
[0020] The end of the backup roll is rotatably hinged within the backup roll bearing housing. The second lifting structure is provided between the bottom of the backup roll bearing housing and the frame for lifting the backup roll to the lifting space and forming the replacement space between the backup roll bearing housing and the backing plate structure.
[0021] In a preferred embodiment, a first sliding surface and a second sliding surface, which are located on the same horizontal plane and parallel to each other, are formed at the bottom of the supporting roll bearing block. The first sliding surface and the second sliding surface are respectively arranged on opposite sides of the frame. The first sliding surface and the second sliding surface both extend horizontally in the direction from the driving side to the operating side of the frame, and are used for the supporting roll bearing block to slide out of the frame through the first sliding surface and the second sliding surface.
[0022] In a preferred embodiment, the second lifting structure includes:
[0023] A plurality of second lifting members, wherein each of the second lifting members is respectively connected between the first sliding surface and the frame or between the second sliding surface and the frame;
[0024] The plurality of second lifting members connected to the first sliding surface and the plurality of second lifting members connected to the second sliding surface are symmetrically arranged with respect to the middle parallel line of the first sliding surface and the second sliding surface.
[0025] In a preferred embodiment, at least one of the second lifting members connected to the first sliding surface and at least one of the second lifting members connected to the second sliding surface are arranged close to the driving side of the frame;
[0026] And at least one of the second lifting members connected to the first sliding surface and at least one of the second lifting members connected to the second sliding surface are arranged close to the operating side of the frame.
[0027] In a preferred embodiment, the first lifting structure is arranged on the inner side surface of the housing window of the frame or on the outer side surface of the housing window of the frame;
[0028] The second lifting structure is arranged on the inner side surface of the housing window of the frame or on the outer side surface of the housing window of the frame.
[0029] Compared with the prior art, the technical solution of the present utility model has the following characteristics and advantages:
[0030] The utility model can push the work roll structure to lift through the first lifting structure. After the work roll structure is lifted, the work roll structure can be pulled out of the frame, which is convenient for replacing the work roll. At the same time, a lifting space will be formed between the work roll structure and the backup roll structure, and this lifting space can be used to reserve a rising space for the backup roll structure. After the work roll structure is lifted, the backup roll structure can be pushed to lift through the second lifting structure. The backup roll structure is lifted into the lifting space. When the backup roll structure is lifted, the backup roll structure can be pulled out of the frame, which is convenient for replacing the backup roll. At the same time, a replacement space will be formed between the backup roll structure and the backing plate structure. The operator can use tools to pull the backing plate structure out of the frame to the outside of the frame through the replacement space and replace it with a new backing plate structure, improving the replacement and maintenance efficiency of the backing plate structure. Brief Description of the Drawings
[0031] Figure 1 It is a structural diagram of a four-high rolling mill of the utility model.
[0032] Description of the reference numerals in the drawings:
[0033] 100, frame; 110, roll changing opening;
[0034] 200, upper pressure roll part;
[0035] 300, lower pressure roll part; 310, work roll structure; 311, work roll; 312, work roll bearing seat; 313, track structure; 3131, first track; 3132, second track; 320, backup roll structure; 321, backup roll; 322, backup roll bearing seat; 3221, first sliding surface; 3222, second sliding surface; 330, backing plate structure;
[0036] 400, first lifting structure; 410, first lifting member;
[0037] 500, second lifting structure; 510, second lifting member. Detailed Description of the Embodiment
[0038] In order to enable those skilled in the art to better understand the technical solutions in the utility model, the following will clearly and completely describe the technical solutions in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the utility model.
[0039] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only embodiments.
[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model belongs. The terms used herein in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.
[0041] As Figure 1 shown, this utility model provides a four-roll rolling mill, comprising:
[0042] A frame 100, with an upper roll part 200 and a lower roll part 300 disposed up and down in the inner cavity of the frame 100. The lower roll part 300 includes a work roll structure 310, a backup roll structure 320 and a backing plate structure 330 that are in contact with each other up and down;
[0043] A first lifting structure 400, disposed between the work roll structure 310 and the frame 100. The first lifting structure 400 is used to lift the work roll structure 310 and form a lifting space below the work roll structure 310;
[0044] A second lifting structure 500, disposed between the backup roll structure 320 and the frame 100. The second lifting structure 500 is used to lift the backup roll structure 320 into the lifting space and form a replacement space between the backup roll structure 320 and the backing plate structure 330 for replacing the backing plate structure 330.
[0045] In the four-roll rolling mill provided by this utility model, a channel for rolling pipe fittings is formed between the upper roll part 200 and the lower roll part 300. Among them, the work roll structure 310, the backup roll structure 320 and the backing plate structure 330 of the lower roll part 300 are in contact with each other in sequence from top to bottom. The work roll structure 310 is used for rolling pipe fittings, the backup roll structure 320 is in contact with the work roll structure 310 to provide a supporting force for the work roll structure 310, and the backing plate structure 330 is disposed at the bottom of the inner cavity of the frame 100 and is in contact with the backup roll structure 320 for compensating for the roll diameter wear of the backup roll structure 320 and the work roll structure 310.
[0046] In this embodiment, the first lifting structure 400 is arranged between the work roll structure 310 and the frame 100. That is, the work roll structure 310 can be pushed to lift through the first lifting structure 400. After the work roll structure 310 is lifted, a lifting space will be formed between the work roll structure 310 and the backup roll structure 320 (i.e., the lifting space below the work roll structure 310), and this lifting space can be used to reserve a rising space for the backup roll structure 320. After the work roll structure 310 is lifted, the backup roll structure 320 can be pushed to lift through the second lifting structure 500. The backup roll structure 320 is lifted into the lifting space. When the backup roll structure 320 is lifted, a replacement space will be formed between the backup roll structure 320 and the backing plate structure 330 (i.e., the replacement space below the backup roll structure 320). After the backup roll structure 320 is lifted, the backing plate structure 330 is separated from the backup roll structure 320, and the operator can use tools to drag the backing plate structure 330 out of the frame 100 through the replacement space and replace it with a new backing plate structure 330.
[0047] As Figure 1 shown, in a preferred embodiment, the work roll structure 310 includes: a work roll 311, a work roll bearing housing 312, and a track structure 313;
[0048] The end of the work roll 311 is rotatably hinged in the work roll bearing housing 312. The track structure 313 is arranged at the bottom of the work roll bearing housing 312. The track structure 313 extends horizontally along the direction from the drive side to the operation side of the frame 100. The work roll bearing housing 312 can move along the extension direction of the track structure 313. The first lifting structure 400 is arranged between the track structure 313 and the frame 100 to lift the track structure 313 and form a lifting space between the work roll bearing housing 312 and the backup roll structure 320.
[0049] For the four-high rolling mill provided in this embodiment, the ends of both ends of the work roll 311 are rotatably hinged in the work roll bearing housing 312, and the middle part of the work roll 311 is used for rolling pipe fittings. The outer diameter of the work roll bearing housing 312 in this embodiment is smaller than the inner diameter of the inner cavity of the frame 100, so that the work roll bearing housing 312 can drive the work roll 311 to move up and down in the inner cavity of the frame 100. In this embodiment, a track structure 313 is arranged at the bottom of the work roll bearing housing 312, and the first lifting structure 400 is arranged between the track structure 313 and the frame 100. That is, when the first lifting structure 400 lifts the work roll structure 310, the work roll bearing housing 312 and the work roll 311 are lifted by lifting the track structure 313.
[0050] In this embodiment, the work roll bearing housing 312 can move along the extending direction of the track structure 313, so that the work roll bearing housing 312 can move to replace the work roll 311. In this embodiment, a roll changing opening 110 is provided on the operating side of the frame 100. The roll changing opening 110 is communicated with the inner cavity of the frame 100. The track structure 313 extends horizontally along the direction from the driving side to the operating side of the frame 100. That is, the work roll bearing housing 312 can move out of the frame 100 from the roll changing opening 110 along the extending direction of the track structure 313 to realize the maintenance and replacement of the work roll 311. In this embodiment, when the work roll 311 needs to be replaced, the track structure 313 is first lifted by the first lifting structure 400 to a position flush with the roll changing track outside the frame 100. At this time, the track structure 313 can be aligned end to end with the roll changing track, so that the work roll bearing housing 312 can move along the track structure 313 and the roll changing track to the outside of the frame 100, which can effectively improve the maintenance efficiency of the work roll 311.
[0051] As Figure 1 shown, in a preferred embodiment, the track structure 313 includes:
[0052] A first track 3131 and a second track 3132. The first track 3131 and the second track 3132 are respectively arranged on opposite sides of the frame 100, and the first track 3131 and the second track 3132 are located on the same horizontal plane and are parallel.
[0053] For the four-high rolling mill provided in this embodiment, the first track 3131 and the second track 3132 are respectively arranged on opposite sides of the frame 100. That is, the first track 3131 and the second track 3132 are respectively arranged on opposite sides of the bottom of the work roll bearing housing 312. In this embodiment, the track structure 313 extends horizontally along the direction from the driving side to the operating side of the frame 100 and the work roll bearing housing 312 can move out of the frame 100 from the roll changing opening 110 along the extending direction of the track structure 313. That is, the first track 3131 and the second track 3132 are respectively arranged on opposite sides of the non-driving side and the non-operating side of the frame 100. The first track 3131 and the second track 3132 are located on the same horizontal plane and are parallel, which is convenient for the work roll bearing housing 312 to move out of the frame 100 along the first track 3131 and the second track 3132, and also makes the pressures on the first track 3131 and the second track 3132 from the work roll bearing housing 312 the same, so that the work roll bearing housing 312 can move smoothly.
[0054] As Figure 1 shown, in a preferred embodiment, the first lifting structure 400 includes:
[0055] A plurality of first lifting members 410, wherein each first lifting member 410 is respectively connected between the first rail 3131 and the frame 100 or between the second rail 3132 and the frame 100.
[0056] In the four-high rolling mill provided in this embodiment, in one embodiment, the first lifting member 410 is generally a hydraulic cylinder. In another specific embodiment, there is no limitation on the specific structure of the first lifting member 410. In this embodiment, a plurality of first lifting members 410 are connected between the first rail 3131 and the frame 100, and a plurality of first lifting members 410 are connected between the second rail 3132 and the frame 100. That is, the first rail 3131 and the second rail 3132 are synchronously lifted by a plurality of first lifting members 410 to stably lift the work roll bearing block 312 and the work roll 311.
[0057] As Figure 1 shown, in a preferred embodiment, at least one first lifting member 410 connecting the first rail 3131 and at least one first lifting member 410 connecting the second rail 3132 are arranged near the drive side of the frame 100;
[0058] and at least one first lifting member 410 connecting the first rail 3131 and at least one first lifting member 410 connecting the second rail 3132 are arranged near the operating side of the frame 100.
[0059] In the four-high rolling mill provided in this embodiment, by respectively arranging at least one first lifting member 410 at the position of the first rail 3131 near the drive side of the frame 100 and at the position of the first rail 3131 near the operating side of the frame 100, it is possible to avoid the problem that when a plurality of first lifting members 410 lift the first rail 3131, both ends of the first rail 3131 are easily deformed under the influence of the gravity moment due to the excessive length of the first rail 3131. Specifically, in this embodiment, one first lifting member 410 is arranged at the position of the first rail 3131 near the drive side of the frame 100, and one first lifting member 410 is arranged at the position of the first rail 3131 near the operating side of the frame 100.
[0060] In the four-high rolling mill provided in this embodiment, by respectively arranging at least one first lifting member 410 at the position of the second rail 3132 near the drive side of the frame 100 and at the position of the second rail 3132 near the operating side of the frame 100, it is possible to avoid the problem that when a plurality of first lifting members 410 lift the second rail 3132, both ends of the second rail 3132 are easily deformed under the influence of the gravity moment due to the excessive length of the second rail 3132. Specifically, in this embodiment, one first lifting member 410 is arranged at the position of the second rail 3132 near the drive side of the frame 100, and one first lifting member 410 is arranged at the position of the second rail 3132 near the operating side of the frame 100.
[0061] As shown Figure 1 in a preferred embodiment, the backup roll structure 320 includes: a backup roll 321 and a backup roll bearing housing 322;
[0062] The end of the backup roll 321 is rotatably hinged within the backup roll bearing housing 322, and a second lifting structure 500 is provided between the bottom of the backup roll bearing housing 322 and the frame 100 for lifting the backup roll 321 to a lifting space and forming a replacement space between the backup roll bearing housing 322 and the backing plate structure 330.
[0063] In the four-high rolling mill provided by this embodiment, the ends of both ends of the backup roll 321 are rotatably hinged within the backup roll bearing housing 322, and the middle part of the backup roll 321 is used to abut against and support the work roll 311. The outer diameter of the backup roll bearing housing 322 in this embodiment is smaller than the inner diameter of the inner cavity of the frame 100, so that the backup roll bearing housing 322 can drive the backup roll 321 to move up and down within the inner cavity of the frame 100. In this embodiment, the second lifting structure 500 is provided between the bottom of the backup roll bearing housing 322 and the frame 100, that is, when the second lifting structure 500 pushes the backup roll structure 320 to lift, the backup roll 321 is lifted by lifting the backup roll bearing housing 322.
[0064] In a specific embodiment, the backup roll bearing housing 322 can be directly pushed upward by the second lifting structure 500, and then the backup roll 321, the work roll 311, and the work roll bearing housing 312 are driven to move upward together by the backup roll bearing housing 322 to form a replacement space between the backup roll structure 320 and the backing plate structure 330 for replacing the backing plate structure 330; in another specific embodiment, the work roll bearing housing 312 and the work roll 311 can also be lifted first by a plurality of first lifting members 410 to form a lifting space between the work roll bearing housing 312 and the backup roll structure 320, and then the backup roll bearing housing 322 is pushed upward into the lifting space by the second lifting structure 500 to form a replacement space between the backup roll bearing housing 322 and the backing plate structure 330, facilitating the backing plate structure 330 to be dragged out through the replacement space, and effectively improving the maintenance efficiency and replacement efficiency of the backing plate structure 330.
[0065] As shown Figure 1As shown, in a preferred embodiment, a first sliding surface 3221 and a second sliding surface 3222, which are located on the same horizontal plane and parallel to each other, are formed at the bottom of the backup roll bearing housing 322. The first sliding surface 3221 and the second sliding surface 3222 are respectively disposed on opposite sides of the frame 100. Both the first sliding surface 3221 and the second sliding surface 3222 extend horizontally in the direction from the drive side to the operator side of the frame 100, and are used for the backup roll bearing housing 322 to slide out of the frame 100 through the first sliding surface 3221 and the second sliding surface 3222.
[0066] In this embodiment, the backup roll bearing housing 322 can move along the extending direction of the first sliding surface 3221 and the second sliding surface 3222. Moving the backup roll bearing housing 322 is beneficial for the operator to replace or repair the backup roll 321. In this embodiment, when the backup roll 321 needs to be replaced, the second lifting structure 500 first lifts the first sliding surface 3221 and the second sliding surface 3222 to a position flush with the roll changing track outside the frame 100, so that the backup roll bearing housing 322 can move to the outside of the frame 100 through the first sliding surface 3221 and the second sliding surface 3222, which can effectively improve the maintenance efficiency of the backup roll 321.
[0067] For the four-high rolling mill provided in this embodiment, the first sliding surface 3221 and the second sliding surface 3222 are respectively disposed on opposite sides of the frame 100, that is, the first sliding surface 3221 and the second sliding surface 3222 are respectively arranged on opposite sides of the bottom of the backup roll bearing housing 322. In this embodiment, the first sliding surface 3221 and the second sliding surface 3222 extend horizontally in the direction from the drive side to the operator side of the frame 100 and the backup roll bearing housing 322 can move to the outside of the frame 100 through the first sliding surface 3221 and the second sliding surface 3222, that is, the first sliding surface 3221 and the second sliding surface 3222 are respectively disposed on opposite sides of the non-drive side and the non-operator side of the frame 100; the first sliding surface 3221 and the second sliding surface 3222 are located on the same horizontal plane and parallel to each other, which is convenient for the backup roll bearing housing 322 to move to the outside of the frame 100 through the first sliding surface 3221 and the second sliding surface 3222, and also makes the pressures of the first sliding surface 3221 and the second sliding surface 3222 on the frame 100 the same, so that the backup roll bearing housing 322 can move smoothly.
[0068] As Figure 1 shown, in a preferred embodiment, the second lifting structure 500 includes:
[0069] A plurality of second lifting members 510, wherein each second lifting member 510 is respectively connected between the first sliding surface 3221 and the frame 100 or between the second sliding surface 3222 and the frame 100;
[0070] The multiple second lifting members 510 connecting to the first sliding surface 3221 and the multiple second lifting members 510 connecting to the second sliding surface 3222 are symmetrically arranged with respect to the middle parallel line of the first sliding surface 3221 and the second sliding surface 3222.
[0071] In the four-roll mill provided by this embodiment, in one embodiment, the second lifting member 510 is generally a hydraulic cylinder. In another specific embodiment, there is no limitation on the specific structure of the second lifting member 510. In this embodiment, the multiple second lifting members 510 are connected between the first sliding surface 3221 and the frame 100, and the multiple second lifting members 510 are also connected between the second sliding surface 3222 and the frame 100. That is, the first sliding surface 3221 and the second sliding surface 3222 of the backup roll bearing block 322 are synchronously lifted by the multiple second lifting members 510 to stably lift the backup roll bearing block 322 and the backup roll 321. In this embodiment, the middle parallel line is coplanar and parallel to the first sliding surface 3221 and the second sliding surface 3222, and the distance from the middle parallel line to the first sliding surface 3221 is the same as the distance from the middle parallel line to the second sliding surface 3222. The multiple second lifting members 510 connecting to the first sliding surface 3221 and the multiple second lifting members 510 connecting to the second sliding surface 3222 are symmetrically arranged with respect to the middle parallel line. That is, the pushing position distributions of the multiple second lifting members 510 on the first sliding surface 3221 and the pushing position distributions of the multiple second lifting members 510 on the second sliding surface 3222 are the same, and the lifting of the backup roll bearing block 322 and the backup roll 321 can be realized more smoothly.
[0072] As Figure 1 shown, in a preferred embodiment, at least one second lifting member 510 connecting to the first sliding surface 3221 and at least one second lifting member 510 connecting to the second sliding surface 3222 are arranged close to the drive side of the frame 100;
[0073] and at least one second lifting member 510 connecting to the first sliding surface 3221 and at least one second lifting member 510 connecting to the second sliding surface 3222 are arranged close to the operating side of the frame 100.
[0074] The four-high rolling mill provided by this embodiment can avoid the problem that when multiple second lifting members 510 push the first sliding surface 3221, both ends of the first sliding surface 3221 are prone to deformation under the influence of the gravity moment due to the excessive length of the first sliding surface 3221 by respectively arranging at least one second lifting member 510 at a position of the first sliding surface 3221 close to the drive side of the frame 100 and a position of the first sliding surface 3221 close to the operating side of the frame 100. Specifically, in this embodiment, one second lifting member 510 is arranged at a position of the first sliding surface 3221 close to the drive side of the frame 100, and one second lifting member 510 is arranged at a position of the first sliding surface 3221 close to the operating side of the frame 100.
[0075] The four-high rolling mill provided by this embodiment can avoid the problem that when multiple second lifting members 510 lift the second sliding surface 3222, both ends of the second sliding surface 3222 are prone to deformation under the influence of the gravity moment due to the excessive length of the second sliding surface 3222 by respectively arranging at least one second lifting member 510 at a position of the second sliding surface 3222 close to the drive side of the frame 100 and a position of the second sliding surface 3222 close to the operating side of the frame 100. Specifically, in this embodiment, one second lifting member 510 is arranged at a position of the second sliding surface 3222 close to the drive side of the frame 100, and one second lifting member 510 is arranged at a position of the second sliding surface 3222 close to the operating side of the frame 100.
[0076] As Figure 1 shown, in a preferred embodiment, the first lifting structure 400 is arranged on the inner side surface of the housing window of the frame 100 or on the outer side surface of the housing window of the frame 100;
[0077] The second lifting structure 500 is arranged on the inner side surface of the housing window of the frame 100 or on the outer side surface of the housing window of the frame 100.
[0078] The four-high rolling mill provided by this embodiment can protect the first lifting structure 400 and the second lifting structure 500 from being affected by the environment in the rolling environment and improve their service life by arranging the first lifting structure 400 and the second lifting structure 500 on the inner side surface of the housing window of the frame 100; by arranging the first lifting structure 400 and the second lifting structure 500 on the outer side surface of the housing window of the frame 100, it is convenient for the operator to overhaul and maintain the first lifting structure 400 and the second lifting structure 500.
[0079] In the above-described specific embodiments, the object, technical solution, and beneficial effects of the present utility model have been further described in detail. It should be understood that the above are only specific embodiments of the present utility model and are not used to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A four-high rolling mill, characterized in that: include: A frame, wherein an upper pressure roller portion and a lower pressure roller portion are arranged in an inner cavity of the frame, and the lower pressure roller portion comprises a working roller structure, a supporting roller structure and a pad structure abutting against each other up and down; a first lifting structure, disposed between the working roll structure and the frame, the first lifting structure being used to lift the working roll structure and form a lifting space below the working roll structure; The second lifting structure is arranged between the supporting roller structure and the frame, and is used to lift the supporting roller structure into the lifting space and form a replacement space for replacing the pad structure between the supporting roller structure and the pad structure.
2. The four-high rolling mill according to claim 1, characterized in that: The working roll structure comprises: a working roll, a working roll bearing seat, and a track structure; The end of the working roll is rotatably hinged in the working roll bearing seat, the track structure is arranged at the bottom of the working roll bearing seat, the track structure is horizontally extended in the direction from the transmission side to the operating side of the frame, the working roll bearing seat can move along the extension direction of the track structure, and the first lifting structure is arranged between the track structure and the frame to lift the track structure and form the lifting space between the working roll bearing seat and the supporting roll structure.
3. The four-high rolling mill according to claim 2, characterized in that: The track structure comprises: A first track and a second track, wherein the first track and the second track are respectively arranged on opposite sides of the frame, and the first track and the second track are located in the same horizontal plane and are parallel.
4. The four-high rolling mill according to claim 3, characterized in that: The first lifting structure comprises: A plurality of first lifting members, wherein each of the first lifting members is respectively connected between the first rail and the frame or between the second rail and the frame.
5. The four-high rolling mill according to claim 4, characterized in that: At least one of the first lifting members connected to the first rail and at least one of the first lifting members connected to the second rail are disposed close to the transmission side of the frame; And at least one of the first lifting members connected to the first rail and at least one of the first lifting members connected to the second rail are arranged close to the operating side of the frame.
6. The four-high rolling mill according to any one of claims 1 to 5, characterized in that The support roller structure comprises: a support roller and a support roller bearing seat; The end of the support roller is rotatably hinged in the support roller bearing seat, and the second lifting structure is arranged between the bottom of the support roller bearing seat and the frame, so as to lift the support roller to the lifting space and form the replacement space between the support roller bearing seat and the pad structure.
7. The four-high rolling mill according to claim 6, characterized in that The bottom of the supporting roller bearing seat is formed with a first sliding surface and a second sliding surface which are located on the same horizontal plane and are parallel to each other. The first sliding surface and the second sliding surface are respectively arranged on opposite sides of the frame. The first sliding surface and the second sliding surface are both horizontally extended from the transmission side to the operation side of the frame, so that the supporting roller bearing seat can slide out of the frame through the first sliding surface and the second sliding surface.
8. The four-high rolling mill according to claim 7, characterized in that The second lifting structure comprises: A plurality of second lifting members, wherein each of the second lifting members is respectively connected between the first sliding surface and the frame or between the second sliding surface and the frame; The plurality of second lifting members connected to the first sliding surface and the plurality of second lifting members connected to the second sliding surface are symmetrically arranged relative to a parallel line between the first sliding surface and the second sliding surface.
9. The four-high rolling mill according to claim 8, characterized in that At least one of the second lifting members connected to the first sliding surface and at least one of the second lifting members connected to the second sliding surface are disposed close to the transmission side of the frame; And at least one of the second lifting members connected to the first sliding surface and at least one of the second lifting members connected to the second sliding surface are arranged close to the operating side of the frame.
10. The four-high rolling mill according to claim 1, characterized in that The first lifting structure is arranged on the inner side of the arch window of the frame, or on the outer side of the arch window of the frame; The second lifting structure is arranged on the inner side of the arch window of the frame, or on the outer side of the arch window of the frame.