Continuous rolling unit
By designing a strip lifting device in the continuous rolling mill group, the coordinated movement of the upper and lower pressing joints stabilizes the strip height, the problem of sagging and bending interference roll replacement of the strip is solved, and the production efficiency and quality are improved.
Patent Information
- Application Number
- CN202421030976.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-13
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-13
AI Technical Summary
In continuous rolling mills, the strip steel sags and bends due to its own gravity during the roll replacement process, interfering with the return movement of the roller changer, affecting the production beat and the surface quality of the strip steel.
A strip lifting device is designed, including an upper pressing part and a lower pressing part, which is close to or away from each other by driving components, and is used to stabilize the strip with a longer span to the desired height, avoiding interference with the operation of the automatic roller changing equipment. The device includes a cylinder, a piston push rod, a guide rod, a gear and a limiting structure to ensure coordinated movement and stable clamping of the upper and lower pressing joints.
It effectively avoids interference between strip steel and automatic roller changing equipment, improves production efficiency and strip surface quality, and prevents the impact of strip sagging and bending on production.
Smart Images
Figure CN222241932U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rolling mill equipment, in particular to a continuous rolling mill group. Background Art
[0002] The work roll change in the continuous rolling mill is a common key link involved in the strip rolling production. At present, it is mainly completed with the assistance of automatic roll change device. At present, the spacing between adjacent work rolls in the continuous rolling mill is generally 4 to 5 meters. During the online roll change operation, the span of the strip at both ends can reach nearly 9 meters. At this time, the strip will sag and bend under its own gravity, interfering with the return movement of the roll change car. Not only does it hinder the automatic roll change operation, but it may also damage the strip surface, affecting the production rhythm and strip surface quality. Utility Model Content
[0003] The main purpose of the utility model is to provide a continuous rolling mill group, aiming to solve the problem that the strip steel affects the roll changing operation when the working rolls are replaced in the existing continuous rolling mill group.
[0004] To achieve the above-mentioned purpose, the utility model proposes a continuous rolling mill group, comprising multiple rolling mills, with an inter-rolling area formed between every two adjacent rolling mills, and characterized in that at least part of the inter-rolling area is arranged with a strip lifting device, each of the strip lifting devices comprises an upper pressing part, a lower pressing part and a driving component for driving the upper pressing part and the lower pressing part to approach or move away from each other, the upper pressing part is arranged above the strip running channel, and the lower pressing part is arranged below the strip running channel.
[0005] According to some embodiments of the utility model, the strip lifting device also includes a frame, a support, and a connecting assembly installed on the frame along the vertical movement, the driving assembly is connected between the bottom of the lower pressing part and the top of the support, the upper pressing part and the support are fixedly connected to the connecting assembly, the lower pressing part is movably connected to the connecting assembly along the vertical movement, the frame is provided with a first limiting structure for limiting the downward movement of the lower pressing part and a second limiting structure for limiting the downward movement of the upper pressing part, and the driving assembly can drive the lower pressing part and the support to move closer to or away from each other.
[0006] According to some embodiments of the utility model, the driving assembly includes a cylinder, which includes a cylinder body and a piston push rod, one end of the cylinder body facing away from the piston push rod is fixedly connected to the support, and the free end of the piston push rod is fixedly connected to the bottom of the lower pressing part.
[0007] According to some embodiments of the utility model, the connecting assembly includes two guide rods arranged side by side, and the axial direction of each guide rod is parallel to the vertical direction, the upper pressing part and the support are fixedly connected to the two guide rods at both ends in the horizontal direction, and the lower pressing part is movably connected to the two guide rods at both ends in the horizontal direction.
[0008] According to some embodiments of the utility model, the two guide rods are provided with toothed grooves, the lower pressing portion is respectively engaged with the toothed grooves on the two guide rods through two gears, the two gears are connected through a synchronization shaft, and the axial direction of the synchronization shaft is parallel to the horizontal direction.
[0009] According to some embodiments of the utility model, a guiding structure for movably guiding the connecting assembly is provided on the frame.
[0010] According to some embodiments of the present invention, a plurality of pressing protrusions are provided at intervals on the surfaces opposite to each other of the upper pressing portion and the lower pressing portion.
[0011] According to some embodiments of the present invention, the number of the pressing protrusions located on the upper pressing part and the number of the pressing protrusions located on the lower pressing part are the same and their positions are arranged in a one-to-one correspondence.
[0012] According to some embodiments of the utility model, connecting structures are provided on both sides of the frame in the horizontal direction, and each of the strip lifting devices is connected to the frame body inside the continuous rolling mill group close to each of the working rolls through the two connecting structures.
[0013] The utility model has at least the following beneficial effects:
[0014] In the utility model, at least part of the inter-rolling area is arranged with a strip lifting device. When the continuous rolling mill group needs to change the working rolls, the upper pressing part and the lower pressing part can be brought close to each other to press and stabilize the strip with a longer span to the required height of the profile running channel, thereby avoiding interference with the operation of the automatic roll changing equipment and improving production efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0016] Figure 1 A schematic structural diagram of a strip steel lifting device (production state) in a continuous rolling mill provided by an embodiment of the utility model;
[0017] Figure 2 for Figure 1 A schematic diagram of the structure of the cylinder and the connecting components;
[0018] Figure 3 for Figure 1 Schematic diagram of the structure of the strip lifting device (pressed state).
[0019] Description of reference numerals:
[0020] 100-strip lifting device; 1-frame; 11-first limiting structure; 12-second limiting structure; 2-upper pressing part; 31-support; 32-lower pressing part; 4-driving assembly; 41-cylinder; 411-cylinder body; 412-piston push rod; 5-connecting assembly; 51-guide rod; 6-gear; 61-synchronizing shaft; 7-guide structure; 8-pressing convex part; 9-connecting structure; 10-strip running channel. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0022] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0023] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0024] The utility model provides a continuous rolling mill group. Figure 1-Figure 3 The utility model provides a specific embodiment of a strip steel lifting device inside a continuous rolling mill group.
[0025] like Figure 1 An embodiment of the utility model provides a continuous rolling mill group, including multiple rolling mills, with an inter-rolling area formed between each two adjacent rolling mills, characterized in that at least part of the inter-rolling area is arranged with a strip lifting device 100, each of the strip lifting devices 100 includes an upper pressing part 2, a lower pressing part 32 and a driving component 4 for driving the upper pressing part 2 and the lower pressing part 32 to move closer to or away from each other, the upper pressing part 2 is arranged above the strip running channel 10, and the lower pressing part 32 is arranged below the strip running channel 10.
[0026] In the utility model, at least part of the inter-rolling area is arranged with a strip lifting device 100. When the continuous rolling mill needs to change the working rolls, the upper pressing part 2 and the lower pressing part 32 can be brought close to each other to press and stabilize the strip with a longer span to the required height of the strip running channel 10, thereby avoiding interference with the operation of the automatic roll changing equipment and improving production efficiency and quality.
[0027] Specifically, the strip lifting device 100 also includes a frame 1, a support 31 and a connecting component 5 vertically movably installed on the frame, the driving component 4 is connected between the bottom of the lower pressing part 32 and the top of the support 31, the upper pressing part 2 and the support 31 are fixedly connected to the connecting component 5, the lower pressing part 32 is vertically movably connected to the connecting component 5, the frame 1 is provided with a first limiting structure 11 for limiting the downward movement of the lower pressing part and a second limiting structure 12 for limiting the downward movement of the upper pressing part, the driving component 4 can drive the lower pressing part 32 and the support 31 to move closer to or away from each other.
[0028] It can be understood that, because the upper pressing part 2 and the support 31 are both fixedly connected to the connecting assembly 5, the support 31, the upper pressing part 2 and the connecting assembly 5 form a whole, and the connecting assembly 5 is movably installed on the frame 1 along the vertical direction, so the whole can move vertically, and because the lower pressing part 32 is movably connected to the connecting assembly 5 along the vertical direction, the upper pressing part 2 can also move vertically, and the lower pressing part 32 is connected to the support 31 through the driving assembly 4, and the driving assembly 4 can drive the lower pressing part 32 and the support 31 to move closer to or away from each other, thereby making the The upper pressing part 2 and the lower pressing part 32 can move away from or towards each other. When the continuous rolling mill needs to change the working rolls, the upper pressing part 2 and the lower pressing part 32 are moved towards each other through the driving component 4 to press and stabilize the strip with a longer span to a required height. Considering that under the action of gravity, the upper pressing part 2 and the lower pressing part 32 will continue to move downward, therefore, the frame 1 is provided with a first limiting structure 11 for limiting the downward movement of the lower pressing part 32 and a second limiting structure 12 for limiting the downward movement of the upper pressing part 2, so that the upper pressing part 2 and the lower pressing part 32 both have a lower limit position.
[0029] Specifically, the driving assembly 4 includes a cylinder 41, and the cylinder 41 includes a cylinder body 411 and a piston push rod 412. The end of the cylinder body 411 facing away from the piston push rod 412 is fixedly connected to the support 31, and the free end of the piston push rod 412 is fixedly connected to the bottom of the lower pressing part 32. The frame 1 is provided with a first limiting structure 11 for limiting the downward movement of the lower pressing part 32, so that the lower pressing part has a lower limit position in its activity stroke.
[0030] The working principle of the strip lifting device 100 using the cylinder 41 as the driving component 4 is as follows: (1) During conventional production / threading, refer to Figure 1 and Figure 2 , because when the cylinder 41 is not ventilated, the lower pressing part 32 will be in the lower limit position under its own weight. At this time, the air intake of the rod chamber of the cylinder 41 pushes it to the limit position. At this time, because the lower pressing part 32 is in the lower limit position, the piston push rod 412 connected to the lower pressing part 32 will remain motionless. Under the action of air pressure, the cylinder body 411 moves upward, driving the support 31 to move upward, so as to drive the upper pressing part 2 and the connecting assembly 5 to move upward to the highest point, providing sufficient space for conventional production without affecting normal production; (2) When the working rolls are changed online, please refer to Figure 2 and Figure 3, the rodless chamber of the cylinder 41 is pushed to the limit position by air intake, and the upper pressing part 2, the connecting assembly 5 and the support 31 will firstly descend together with the cylinder body 411, and the lower pressing part 32 will move upward relative to the connecting assembly 5 under the upward movement of the piston push rod 45, and then press and cooperate with the upper pressing part 2 moving downward to clamp and lift the strip, and lift it to the required height of the strip running channel 10 to avoid interference with the operation of the automatic roll changing equipment. The automatic roll changing efficiency is further improved, and the damage to the strip surface is avoided to affect the production cycle and the surface quality of the strip.
[0031] It should be noted that the heights of the strip running channels 10 of different devices are different, so the specific positions of the upper pressing part 2, the lower pressing part 32, the support 31 and the connecting assembly 5 can be adjusted and set according to needs, which will not be described one by one here. In addition, the first limiting structure 11 and the second limiting structure 12 include but are not limited to blocks, limiting pins, etc.
[0032] Specifically, the connecting assembly 5 includes two guide rods 51 arranged side by side, and the axial direction of each guide rod 51 is parallel to the vertical direction. The upper pressing part 2 and the support 31 are fixedly connected to the two guide rods 51 at both ends in the horizontal direction, and the lower pressing part 32 is movably connected to the two guide rods 51 at both ends in the horizontal direction. The connection through the two guide rods 51 can ensure that the upper pressing part 2, the lower pressing part 32 and the support 31 can maintain the left and right ends level, which is beneficial to the pressing and lifting of the horizontally extended strip steel.
[0033] Furthermore, in order to keep the two ends of the horizontal direction moving synchronously when the lower pressing part 32 moves vertically, in this embodiment, the two guide rods 51 are provided with toothed grooves, and the lower pressing part 32 is respectively engaged with the toothed grooves on the two guide rods 51 through two gears 6, and the two gears 6 are connected by a synchronous shaft 61, and the axial direction of the synchronous shaft 61 is parallel to the horizontal direction. In this way, when the cylinder 41 is provided with a plurality of, for example, Figure 1 When the number of the two cylinders 43 is set to two, since the two cylinders 43 provided in the device lack synchronous control, when the two cylinders 43 are started asynchronously, for example, when one side outputs pressure first, it may get stuck. The two gears 6 connected to the synchronization shaft 61 can play a role of coordinated activity, thereby improving the reliability of the operation of the entire device.
[0034] Specifically, the frame 1 is provided with a guide structure 7 for movably guiding the connecting component 5, providing support and guidance for the connecting component 5. The guide structure 7 includes but is not limited to a slide groove, a sleeve, etc. In this embodiment, the guide rod 51 is vertically slidably sleeved in the sleeve.
[0035] Taking into account the shape characteristics of the steel strip and in order to improve the stability of clamping and lifting, in the present embodiment, a plurality of pressing protrusions 8 are provided at intervals on the relative surfaces of the upper pressing part 2 and the lower pressing part 32. The setting of a plurality of support points can improve the pressing stability of the steel strip. In addition, the surface roughness of each pressing protrusion 8 can be increased to reduce the movement of the steel strip after pressing, thereby improving the pressing stability.
[0036] Furthermore, the pressing protrusions 8 located on the upper pressing part 2 and the pressing protrusions 8 located on the lower pressing part 32 are the same in number and are arranged in one-to-one correspondence, thereby ensuring that the pressed strip can be maintained on the same horizontal line, so as to be horizontally maintained and stabilized at the required height of the strip running channel 10, avoiding interference with the operation of the automatic roll changing equipment.
[0037] Specifically, connecting structures 9 are provided on both sides of the frame in the horizontal direction, and each strip lifting device 100 is connected to the continuous rolling mill group through two connecting structures 9 respectively. The connecting structures 9 include but are not limited to connecting plates, connecting blocks, screws and bolts, etc.
[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A continuous rolling mill group, comprising a plurality of rolling mills, wherein a rolling zone is formed between each two adjacent rolling mills, characterized in that: At least part of the rolling area is arranged with a strip lifting device, each of the strip lifting devices includes an upper pressing part, a lower pressing part and a driving component for driving the upper pressing part and the lower pressing part to approach or move away from each other, the upper pressing part is arranged above the strip running channel, and the lower pressing part is arranged below the strip running channel.
2. The tandem rolling mill according to claim 1, characterized in that: The strip steel lifting device also includes a frame, a support, and a connecting component vertically movably installed on the frame, the driving component is connected between the bottom of the lower pressing part and the top of the support, the upper pressing part and the support are fixedly connected to the connecting component, the lower pressing part is vertically movably connected to the connecting component, the frame is provided with a first limiting structure for limiting the downward movement of the lower pressing part and a second limiting structure for limiting the downward movement of the upper pressing part, and the driving component can drive the lower pressing part and the support to move closer to or away from each other.
3. The tandem rolling mill according to claim 2, characterized in that: The driving assembly comprises a cylinder, which comprises a cylinder body and a piston push rod. One end of the cylinder body facing away from the piston push rod is fixedly connected to the support, and the free end of the piston push rod is fixedly connected to the bottom of the lower pressing part.
4. The tandem rolling mill according to claim 2, characterized in that: The connecting assembly includes two guide rods arranged side by side, and the axial direction of each guide rod is parallel to the vertical direction. The upper pressing part and the support are fixedly connected to the two guide rods at both ends in the horizontal direction, and the lower pressing part is movably connected to the two guide rods along the vertical direction.
5. The tandem rolling mill according to claim 4, characterized in that: The two guide rods are provided with toothed grooves, the lower pressing part is respectively engaged with the toothed grooves on the two guide rods through two gears, the two gears are connected through a synchronous shaft, and the axial direction of the synchronous shaft is parallel to the horizontal direction.
6. The tandem rolling mill according to claim 2, characterized in that: The frame is provided with a guiding structure for movably guiding the connecting assembly.
7. The tandem rolling mill according to claim 1, characterized in that: A plurality of pressing protrusions are provided at intervals on the surfaces opposite to the upper pressing part and the lower pressing part.
8. The tandem rolling mill according to claim 7, characterized in that: The number of the pressing protrusions located on the upper pressing part and the number of the pressing protrusions located on the lower pressing part are the same and the positions are arranged in a one-to-one correspondence.
9. The tandem rolling mill according to claim 2, characterized in that: Both sides of the frame in the horizontal direction are provided with connection structures, and each of the strip lifting devices is connected to the continuous rolling mill group through two of the connection structures.