Working roll replacement device of wide and thick plate hot rolling double-stand rolling mill
By designing a working roller replacement device for wide and thick plate hot rolling double stand rolling mills, the production stagnation caused by rolling mill failure is solved, and the normal operation of the production line in the event of a single machine failure is achieved.
Patent Information
- Application Number
- CN202420750581.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-11
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-04-11
AI Technical Summary
In the wide and thick plate hot rolling production line, if a double-stack rolling mill fails, especially the main transmission failure, the roll cannot rotate, which will lead to production stagnation and long processing time, which will not be able to meet production needs.
A wide-thick plate hot-rolled double-stack rolling mill work rolling roll replacement device is designed, which includes a base, cart assembly, roller assembly and motor, which can replace the working rolls of the faulty rolling mill to ensure that the billet or steel plate can pass smoothly.
It is realized that when one rolling mill is maintained, the other rolling mill can continue to roll normally, ensuring the normal operation of the production line, avoiding long-term parking and reducing economic losses.
Smart Images
Figure CN222919320U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a working roll replacement device for a wide and heavy plate hot rolling double-stand rolling mill, belonging to the technical field of auxiliary equipment for wide and heavy plate production in the metallurgical industry. Background Art
[0002] In the wide and heavy plate hot rolling production line, in order to improve the rolling rhythm and optimize the steel plate performance, a double-stand rolling mode is generally adopted. Usually, the blooming mill is used for blooming, and the finishing mill is used for controlling the process and quality accuracy such as plate shape and thickness. If an abnormality occurs in one of the rolling mills, such as a main drive failure (damage to the main drive shaft or the main motor bearing bush of the mechanical part, damage to the main motor or the control system of the electrical part, damage to the main drive-related hydraulic components or control, etc.), it will cause the main drive and the rolling rolls to be unable to rotate, then the abnormal rolling mill cannot be used normally, and the production line cannot produce normally. It usually takes 10 - 30 hours to handle the main drive failure, and the handling time is long, which cannot meet the production requirements.
[0003] Under normal circumstances, a single rolling mill has the function of independently rolling steel plates. However, due to the inability of the rolling rolls of the faulty rolling mill to rotate, the steel plates or billets cannot normally pass through the non-rotating rolling rolls and enter the subsequent processes. If forced to pass by relying on the driving of the front and rear conveying roller tables, since the rolling rolls cannot rotate, it will cause the steel plates or billets to skew or the lower surface to be scratched, and the product quality cannot meet the requirements. Therefore, in such cases, only the production can be stopped for maintenance to handle the abnormality of the faulty rolling mill, and the production can be resumed only after the handling is completed. The maintenance time is long, seriously affecting the normal production rhythm. Therefore, a new technical solution is urgently needed to solve the above problems. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a working roll replacement device for a wide and heavy plate hot rolling double-stand rolling mill, which can replace the working roll of the faulty rolling mill, enable the rolled piece to pass through the faulty rolling mill smoothly, and solve the problems existing in the background art.
[0005] The technical solution of the utility model is as follows:
[0006] A working roll replacement device for a wide and heavy plate hot rolling double-stand rolling mill includes a base, a trolley assembly, a roller table assembly and a motor. The base includes a drive side base, an operation side base, connecting rib plates, a roller table frame, a roller table cover plate and a support arc plate. The drive side base and the operation side base are connected together by the connecting rib plates; roller table frames are respectively arranged above the drive side base and the operation side base, and a roller table cover plate is arranged between the two roller table frames; support arc plates are respectively arranged below the drive side base and the operation side base, and the lower surface of the support arc plate is an arc surface that matches the support roll of the rolling mill;
[0007] The trolley assembly includes a frame, a hook head, and a motor base. The motor base is fixed on the frame, and a hook head is provided at one end of the frame. The other end of the frame is fixedly connected to the base to form a base frame. A wheel assembly is provided below the base frame.
[0008] The roller path assembly is installed in the roller path frame of the base. The roller path assembly is aligned with the front and rear conveying roller paths of the rolling mill. The motor is fixed on the motor base of the trolley assembly, and the motor is drivingly connected to the roller path assembly.
[0009] The wheel assemblies below the base frame all include V-wheel assemblies and flat-wheel assemblies fixed to the lower parts of the drive-side base and the operation-side base, as well as V-wheel assemblies and flat-wheel assemblies fixed below the frame.
[0010] The roller path frames above the drive-side base and the operation-side base are connected and reinforced by triangular gusset plates.
[0011] A rubber pad is provided on the arc surface of the supporting arc plate that cooperates with the supporting roll of the rolling mill.
[0012] The roller path assembly is constrained on the roller path frame by a gland.
[0013] The center line of the motor coincides with the center line of the roller path assembly. The motor and the roller path assembly are connected by a transmission shaft to transmit torque.
[0014] The beneficial effects of the present utility model are as follows: It can realize the conveying of billets or steel plates of abnormal rolling mills, realize the maintenance of one rolling mill while another rolling mill is operating normally, ensure the normal production of the production line, and effectively avoid the long-term shutdown of the production line. This device has the advantages of simple structure, interchangeability of components with those of the rolling mill, convenient use, quick replacement with the working rolls of the rolling mill, effectively reducing the downtime of the production line and economic losses, and can effectively solve the problem of inability to produce during the handling or maintenance of single-stand abnormal faults in the hot rolling of wide and thick steel plates. Description of the Drawings
[0015] Figure 1 It is a schematic structural diagram of the present utility model;
[0016] Figure 2 It is a schematic structural diagram of the base frame;
[0017] Figure 3 It is a schematic structural diagram of the base;
[0018] Figure 4 It is a front view structural diagram of the base;
[0019] Figure 5 It is a sectional structural diagram of the base along A-A;
[0020] Figure 6 It is a schematic structural diagram of the supporting arc plate and the rubber pad assembly;
[0021] Figure 7 Structural schematic diagram of the assembly for the trolley
[0022] Figure 8 Structural schematic diagram of the hook head
[0023] Figure 9 Structural schematic diagram of the roller table assembly
[0024] Figure 10 Structural schematic diagram of gland Ⅰ
[0025] Figure 11 Structural schematic diagram of gland Ⅱ
[0026] Figure 12 Top view sectional structural schematic diagram of the application of the present utility model in a rolling mill
[0027] Figure 13 Three-dimensional structural schematic diagram of the application of the present utility model in a rolling mill
[0028] In the figure: 01 - guide rail; 02 - working roll of the rolling mill; 03 - front and rear conveying roller tables of the rolling mill; 04 - rolling mill housing; 05 - housing roll; 06 - lower balance plunger; 07 - backup roll of the rolling mill; 08 - positioning card board
[0029] 1 - base frame; 2 - base; 3 - trolley assembly; 4 - roller table assembly; 5 - gland Ⅰ; 6 - gland Ⅱ; 7 - motor; 8 - transmission shaft Ⅰ; 9 - transmission shaft Ⅱ
[0030] 201 - drive side base, 202 - operator side base, 2021 - thrust positioning plate, 203 - connecting rib plate, 204 - V-wheel wheel assembly, 205 - flat-wheel wheel assembly, 206 - pressing plate, 207 - roller table frame, 2071 - internal thread hole, 208 - triangular rib plate, 209 - roller table cover plate, 210 - supporting arc plate, 2101 - arc surface, 211 - rubber pad
[0031] 301 - vehicle frame, 302 - hook head, 3011 - wheel base, 302 - hook head, 303 - triangular rib plate, 304 - motor base, 305 - vertical rib Detailed implementation manners
[0032] The present utility model will be further described below with reference to the accompanying drawings and by way of examples
[0033] Refer to the attached Figures 1-13, A working roll replacement device for a wide and heavy plate hot rolling double-stand rolling mill, comprising a base 2, a trolley assembly 3, a roller table assembly 4 and a motor 7. The base 2 includes a drive side base 201, an operator side base 202, a connecting rib plate 203, a roller table frame 207, a roller table cover plate 209 and a support arc plate 210. The drive side base 201 and the operator side base 202 are connected together by the connecting rib plate 203; roller table frames 207 are respectively provided above the drive side base 201 and the operator side base 202, and a roller table cover plate 209 is provided between the two roller table frames 207; support arc plates 210 are respectively provided below the drive side base 201 and the operator side base 202, and the lower surface of the support arc plate 210 is an arc surface that matches the support roll of the rolling mill.
[0034] The trolley assembly 3 includes a vehicle frame 301, a hook head 302 and a motor base 304. The motor base 304 is fixed on the vehicle frame 301, and a hook head 302 is provided at one end of the vehicle frame 301; the other end of the vehicle frame 301 is fixedly connected to the base 2 to form a base frame 1, and a wheel assembly is provided below the base frame 1.
[0035] The roller table assembly 4 is installed in the roller table frame 207 of the base 2, and the roller table assembly 4 is consistent with the front and rear conveying roller tables of the rolling mill; the motor 7 is fixed on the motor base 304 of the trolley assembly 3, and the motor 7 is drivingly connected to the roller table assembly 4.
[0036] In this embodiment, referring to the attached Figures 1-11 , The base frame 1 is integrally composed of the base 2 and the trolley assembly 3. The base 2 is mainly composed of a drive side base 201, an operator side base 202, a connecting rib plate 203, a V-wheel assembly 204, a flat-wheel assembly 205, a pressing plate 206, a roller table frame 207, a triangular rib plate 208, a roller table cover plate 209, a support arc plate 210, a rubber pad 211, etc.
[0037] The drive side base 201 and the operator side base 202 are connected by the connecting rib plate 203. The drive side base 201 is consistent with the lower structure of the working roll bearing seat on the drive side of the rolling mill roll, and its width is consistent with the distance between the two slide plates on both sides of the working roll bearing seat on the drive side of the rolling mill roll; the operator side base 203 is consistent with the lower structure of the bearing seat on the operator side of the rolling mill roll, and its width is consistent with the distance between the two slide plates on both sides of the working roll bearing seat on the operator side of the rolling mill roll; a thrust positioning plate 2021 is provided at the rear end of the operator side base 202.
[0038] V-wheel assemblies 204 and flat-wheel assemblies 205 are respectively provided below the drive side base 201 and the operator side base 202. This wheel assembly is consistent with the wheel assembly of the working roll bearing seat of the rolling mill, and the base 2 can move along the roll guide 01.
[0039] The pressing plate 206 is made of rectangular steel plate and is fixed on the drive side base 201 and the operation side base 202 by welding or connecting with hexagon socket head cap screws.
[0040] Above the drive side base 201 and the operation side base 202, there is a roller table frame 207, which is connected and reinforced by triangular gusset plates 208. There are internal threaded holes 2071 above the roller table frame 207.
[0041] Between the two roller table frames 207, there is a roller table cover plate 209, whose height is slightly lower than the height of the roller table roll surface, which is used to protect the roller table, reduce the impact of the steel plate on the roll surface and prevent the steel plate from drilling into the roller table gap at the same time.
[0042] The support arc plate 210 is integrally a rectangular plate, which is installed at the central position between the drive side base 201 and the operation side base 202. The lower part of it is an arc surface 2101 with a certain radius of curvature, and there are internal threaded holes on the arc surface 2101. The width of the rubber pad 211 is the same as the width of the support arc plate 210, and it is installed on the arc surface 2101 of the support arc plate 210 by hexagon socket head cap screws. After installation, its radius of curvature and the position of the center of the circle are the same as those of the original rolling mill work roll 02.
[0043] The connecting gusset plate 203, the roller table frame 207 and the support arc plate 210 are all used to connect the drive side base 201 and the operation side base 202, and can be used to strengthen the overall strength of the base 2.
[0044] The trolley assembly 3 is mainly composed of a vehicle frame 301, a hook head 302, triangular gusset plates 303, a motor base 304, vertical ribs 305, etc.
[0045] The vehicle frame 301 is integrally a flat plate structure, and there is a wheel base 3011 below it. The V-wheel wheel assembly 204 and the flat-wheel wheel assembly 205 are installed in the wheel base 3011.
[0046] The structure and size of the hook head 302 are the same as those of the hook head of the rolling mill roll bearing seat. The hook head 302 is connected to the vehicle frame 301 by welding and is strengthened and fixed by welding triangular gusset plates 303.
[0047] The vehicle frame 301 is provided with anchor bolt holes. The motor base 304 is fixed above the vehicle frame 301 by bolts. There are vertical ribs 305 above and below the vehicle frame 301, which can be used to strengthen the strength of the vehicle frame 301.
[0048] The base 2 and the trolley assembly 3 are connected by welding and are connected and reinforced by triangular gusset plates. The structural forms, axial spacing and elevation of the wheel assemblies of the two are the same.
[0049] The structure of the roller table assembly 4 is the same as that of the front and rear conveying roller tables 03 of the rolling mill. It is installed in the roller table frame 207 of the base 2. The gland I 5 and the gland II 6 are provided with bolt holes 501 and 601, the size and position of which are the same as those of the internal threaded holes 2071 of the roller table frame 207. The gland I 5 and the gland II 6 are fixed on the roller table frame 207 by bolts to restrain the roller table assembly 4 and ensure its stable operation.
[0050] The model of the motor 7 is the same as that of the motors of the front and rear conveying roller tables of the rolling mill, and it is provided with quick connectors. It is installed on the motor base 304 of the trolley assembly 3 and fixed by bolt connection. After installation, the center line of the installed motor 7 coincides with the center line of the installed roller table assembly 4, and the two are connected by the drive shaft I 8 and the drive shaft II 9 to transmit torque. The drive shaft I 8 and the drive shaft II 9 are both cross-joint universal shafts, which are convenient for quick installation and can transmit large torque.
[0051] The base 2 and the roller table assembly 4 are installed in the rolling mill frame 04, and the roller elevation is the same as that of the front and rear roller tables 03 and the roll surface elevation of the frame rolls 05 of the rolling mill. The position of the pressing plate 206 of the base 2 corresponds to the position of the lower balance plunger 06. The rubber pad 211 installed on the support arc plate 210 below the base 2 contacts the support roll 07 and is restrained by the rolling mill positioning card plate 08 and the lower balance plunger 06. The trolley assembly 3 is located above the outer guide rail 01 of the rolling mill frame 04.
[0052] As Figure 12 、 13 shown, when in use, when an abnormal situation occurs in a rolling mill and it is unable to pass steel normally, this device is used for emergency steel passing to ensure that the production line does not stop and production is maintained.
[0053] First, pull out the working roll of the rolling mill with abnormal faults, place this device on the working roll changing guide rail 01, use the rolling mill roll changing device to act on the hook head 302 position of the trolley assembly, push this device into the rolling mill frame 04, position it through the thrust positioning plate 2021, and lock the thrust positioning plate 2021 through the positioning card plate 08 to restrain and fix it in the horizontal direction. Lift the lower support roll 07 to make it contact and support the rubber pad 211 on the support arc plate 210. At the same time, the lower balance plunger extends to press the pressing plate 206 of the base 2 to achieve restraint in the vertical direction. Connect the power cord of the quick connector of the roller table motor, so that the roller table assembly 4 of this device rotates forward and backward with the front and rear conveying roller tables 03 of the rolling mill, realizing the conveying of billets or steel plates in the rolling mill frame, ensuring single-rolling mill production, single-rolling mill fault handling and maintenance, etc. of the double-stand production line.
[0054] After the treatment is completed, use the rolling mill roll changing device to act on the hook head 302 position of the trolley assembly, pull out this device from the rolling mill frame, replace it with the working roll of the rolling mill, and push it into the rolling mill frame to resume normal production.
Claims
1. A working roll replacement device for a double-stand rolling mill for hot rolling of wide and thick plates, characterized in that: The invention comprises a base (2), a trolley assembly (3), a roller assembly (4) and a motor (7); the base (2) comprises a transmission side base (201), an operating side base (202), a connecting rib plate (203), a roller frame (207), a roller cover plate (209) and a supporting arc plate (210); the transmission side base (201) and the operating side base (202) are connected together via the connecting rib plate (203); roller frames (207) are respectively arranged above the transmission side base (201) and the operating side base (202); a roller cover plate (209) is arranged between the two roller frames (207); supporting arc plates (210) are respectively arranged below the transmission side base (201) and the operating side base (202); the bottom of the supporting arc plates (210) is an arc surface that matches the support rollers of the rolling mill; The trolley assembly (3) comprises a frame (301), a hook (302) and a motor base (304); the motor base (304) is fixed on the frame (301); one end of the frame (301) is provided with a hook (302); the other end of the frame (301) is fixedly connected to the base (2) to form a base frame (1); a wheel assembly is provided below the base frame (1); The roller assembly (4) is installed in the roller frame (207) of the base (2), and the roller assembly (4) is consistent with the front and rear conveying rollers of the rolling mill; the motor (7) is fixed on the motor base (304) of the trolley assembly (3), and the motor (7) is drivingly connected to the roller assembly (4).
2. The working roll replacement device for a double-stand rolling mill for hot rolling of wide and thick plates according to claim 1 is characterized in that: The wheel assemblies below the base frame (1) include a V-wheel wheel assembly and a flat wheel wheel assembly fixed to the lower parts of the transmission side base (201) and the operation side base (202), and a V-wheel wheel assembly and a flat wheel wheel assembly fixed to the lower part of the frame (301).
3. The working roll replacement device for a double-stand rolling mill for hot rolling of wide and thick plates according to claim 1 is characterized in that: The roller frame (207) above the transmission side base (201) and the operating side base (202) is connected and reinforced by a triangular rib plate (208).
4. The working roll replacement device for a double-stand rolling mill for hot rolling of wide and thick plates according to claim 1 is characterized in that: A rubber pad (211) is provided on the arc surface below the supporting arc plate (210) that matches the rolling mill support roller.
5. The working roll replacement device for a double-stand rolling mill for hot rolling of wide and thick plates according to claim 1 is characterized in that: The roller assembly (4) is constrained on the roller frame (207) by a gland.
6. The working roll replacement device for a double-stand rolling mill for hot rolling of wide and thick plates according to claim 1 is characterized in that: The center line of the motor (7) coincides with the center line of the roller assembly (4), and the motor (7) and the roller assembly (4) are connected via a transmission shaft to transmit torque.