Rapid roller drawing and replacing device

Abstract

The utility model relates to the field of metallurgical equipment, and discloses a quick roller drawing and replacing device. The upper pressing cylinder is located at the bottom of the rack, and rolling force needs to overcome the gravity of the lower working roller and the lower supporting roller during leveling; when the rolling force is small, a certain output force of the pressing-up cylinder can be guaranteed, the output force can avoid the zero drift range of a servo valve of the pressing-up cylinder, so that the temper mill is still controllable when the rolling force is small, and the mode is particularly beneficial to temper of mild steel. When steel types such as high-strength steel need to be leveled, only the rolling force output by the pressing-up cylinder needs to be increased. And the pressing-up cylinder is arranged between the lower supporting roller and the bottom of the mounting groove, so that leveling operation of mild steel such as plain carbon steel and high-strength steel such as alloy steel can be met. In addition, upper and lower supporting rollers are arranged at the tops and bottoms of the upper and lower working rollers, so that the transmission synchronism of the upper and lower working rollers is ensured. In addition, each hook is provided with an independent hook hydraulic cylinder, so that replacement and maintenance of a single working roller are realized.

Description

Technical Field

[0001] The utility model relates to the field of metallurgical equipment, in particular to a quick roll extraction and replacement device. Background Art

[0002] In the cold rolling field, there are various units such as pickling lines, continuous annealing lines, galvanizing lines, etc. for processing strip steel. To ensure the mechanical properties and good flatness of the strip steel, an online temper mill is configured on these processing lines. In the existing online temper mills, there are both online temper mills that only temper plain carbon steel and online temper mills that only temper high-strength steels such as alloy steel; therefore, there is an urgent need for an online temper mill that can simultaneously meet the tempering requirements of plain carbon steel and high-strength steel.

[0003] In addition, during the production process of strip steel, the rolls are often damaged to a certain extent. The replacement frequency of the rolls is generally 8 - 12 hours. In most cases, only one roll is damaged; however, the existing roll extraction and replacement device must extract all the rolls simultaneously before the damaged roll can be repaired or replaced, resulting in low replacement efficiency and affecting the production efficiency of the strip steel. Summary of the Utility Model

[0004] In view of the above-mentioned defects existing in the prior art, an online temper mill and a quick roll extraction and replacement device are provided, which can not only realize the online quick roll replacement during the strip steel production process, effectively improve the productivity of the unit, but also realize the quick roll extraction and inspection of a single roll or the upper and lower working rolls.

[0005] The technical solution adopted by the utility model to solve the above technical problems is as follows:

[0006] A quick roll extraction and replacement device is used in an online temper mill;

[0007] The online temper mill includes frames distributed on both sides, and mounting grooves are provided on the frames;

[0008] A horizontally arranged upper support roll, an upper working roll, a lower working roll, and a lower support roll are sequentially connected from top to bottom in the mounting grooves of the two frames. The bottom of the upper support roll is in contact with the top of the upper working roll, and the top of the lower support roll is in contact with the bottom of the lower working roll. A gap for passing the strip steel is left between the upper and lower support rolls;

[0009] A pressing cylinder is provided between the bottom of the lower support roll and the bottom of each mounting groove, and the pressing cylinder is vertically arranged;

[0010] A support roll balance device is provided between the top of the frame and the top of the upper support roll;

[0011] A work roll bending device is provided on the circumferential sides of the upper work roll and the lower work roll. The work roll bending device provides positive and negative bending for the work roll. A fixed track is provided on the bending block of the work roll bending device, and rollers matching the fixed track are provided on the upper and lower work rolls.

[0012] It includes a roll rack cart for loading the work roll and a driving cart for pushing or pulling the work roll. The roll rack cart and the driving cart are located on the drive side of the in-line skin pass mill, and the roll rack cart is located between the driving cart and the in-line skin pass mill. Hooks are provided at the ends of the upper and lower work rolls on the drive side, and multiple hooks matching the hooks are provided on the driving cart. Each hook is equipped with an independent hook hydraulic cylinder, and the hook hydraulic cylinder drives the hook to hook or release the hook head. The driving cart drives all the hooks to approach and move away from the hook heads at the ends of the upper and lower work rolls synchronously.

[0013] According to the above technical solution, a rolling line adjustment device is provided between the top of the installation groove and the upper support roll, which adopts the structural form of a wedge and a stepped plate. The wedge and the stepped plate are driven by a hydraulic cylinder. By controlling the stroke of the hydraulic cylinder, the rolling line adjustment device is automatically set according to the roll diameter of the rolling roll.

[0014] According to the above technical solution, a rolling line roll and an inlet anti-wrinkle roll are successively provided in the input direction of the strip steel, and an outlet anti-tangling roll and a rolling line roll are successively provided in the output direction of the strip steel.

[0015] According to the above technical solution, a rolling line adjustment device is provided between the top of the installation groove and the upper support roll, which adopts the structural form of a wedge and a stepped plate. The wedge and the stepped plate are driven by a hydraulic cylinder. By controlling the stroke of the hydraulic cylinder, the rolling line adjustment device is automatically set according to the roll diameter of the rolling roll;

[0016] A rolling line roll and an inlet anti-wrinkle roll are successively provided in the input direction of the strip steel, and an outlet anti-tangling roll and a rolling line roll are successively provided in the output direction of the strip steel.

[0017] According to the above technical solution, it further includes a roll receiving cart for receiving the old work roll, and the roll receiving cart is located on the operating side of the in-line skin pass mill.

[0018] According to the above technical solution, two hooks are provided on the driving cart.

[0019] According to the above technical solution, two hooks are provided on the driving cart.

[0020] The utility model has the following beneficial effects:

[0021] 1. The upper pressing cylinder is located at the bottom of the frame. When leveling, the rolling force needs to overcome the self-gravity of the lower working roll and the lower backup roll. It can ensure that the upper pressing cylinder has a certain output force under a small rolling force, and this output force can avoid the zero-drift range of the servo valve of the upper pressing cylinder, making the planisher still controllable under a small rolling force. This mode is particularly beneficial for leveling soft steel (plain carbon steel). When it is necessary to level steel grades such as high-strength steel, only the rolling force output by the upper pressing cylinder needs to be increased. Therefore, in this patent, by arranging the upper pressing cylinder between the lower backup roll and the bottom of the installation groove, the leveling operations for soft steel such as plain carbon steel and high-strength steel such as alloy steel can be satisfied. In addition, upper and lower backup rolls are arranged at the top and bottom of the upper and lower working rolls respectively, ensuring the synchronization of the transmission of the upper and lower working rolls.

[0022] 2. During the production process, when the working roll has surface defects after leveling the strip steel, this equipment can quickly extract the upper and lower working rolls from the frame for inspection. Since each hook in this equipment is equipped with a hook hydraulic cylinder that independently drives the hook to hook the hook head, this equipment can either extract the upper and lower working rolls for inspection simultaneously or extract any one of the upper and lower working rolls for inspection. And during the roll extraction process, the strip steel is still in the frame, and the production process of the strip steel is not affected. Such inspections are very necessary for the operation and maintenance personnel in the steel mill. If small local defects are detected on the roll, they can be processed on the working roll rack car, and for serious defects, the working roll will be moved to the roll grinding workshop for processing. During the installation and commissioning process, this equipment can also be used to push a single working roll in separately to check the parallelism between the entry and exit rolling line rolls and the working roll. Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of the online planisher according to the embodiment provided by the present utility model;

[0024] Figure 2 is a schematic structural diagram between the quick roll extraction and replacement device and the online planisher according to the embodiment provided by the present utility model;

[0025] Figure 3 is a schematic structural diagram of the quick roll extraction and replacement device according to the embodiment provided by the present utility model;

[0026] In the figure, 1. Frame; 2. Installation groove; 3. Upper backup roll; 4. Upper working roll; 5. Lower working roll; 6. Lower backup roll; 7. Upper pressing cylinder; 8. Backup roll balance device; 9. Rolling line adjustment device; 10. Working roll bending roll device; 11. Rolling line roll; 12. Entry anti-wrinkle roll; 13. Exit anti-tangling roll; 14. Roll rack car; 15. Driving car; 16. Hook head; 17. Hook; 18. Hook hydraulic cylinder; 19. Roll connecting car; A. Drive side; B. Operator side. Detailed Embodiment

[0027] The present utility model will be described in detail below with reference to the drawings and embodiments.

[0028] Referring to Figure 1 as shown, the online leveling machine provided by the present utility model

[0029] Example 1

[0030] It includes frames 1 distributed on both sides, and mounting grooves 2 are provided on the frames;

[0031] Horizontally arranged upper support rollers 3, upper working rollers 4, lower working rollers 5 and lower support rollers 6 are sequentially connected from top to bottom in the mounting grooves of the two frames. The bottom of the upper support roller is attached to the top of the upper working roller, and the top of the lower support roller is attached to the bottom of the lower working roller. A gap for passing the strip steel is left between the upper and lower support rollers; a working roller locking device is provided at the end of the working roller;

[0032] A pressing cylinder 7 is provided between the bottom of the lower support roller and the bottom of each mounting groove, and the pressing cylinder is vertically arranged;

[0033] A support roller balancing device 8 is provided between the top of the frame and the top of the upper support roller. When it is necessary to replace the working roller or when not working, the upper support roller is lifted by the support roller balancing device, which is convenient for replacing the upper working roller; in addition, it also plays a role in supporting and limiting the upper working roller.

[0034] In this embodiment, the pressing cylinder is located at the bottom of the frame. When leveling, the rolling force needs to overcome the self-gravity of the lower working roller and the lower support roller; it can ensure that the pressing cylinder has a certain output force at a small rolling force, and this output force can avoid the zero drift range of the servo valve of the pressing cylinder, making the leveling machine still controllable at a small rolling force. This mode is particularly beneficial for leveling soft steel (plain carbon steel). When it is necessary to level steel grades such as high-strength steel, only the rolling force output by the pressing cylinder needs to be increased. Therefore, in this patent, by setting the pressing cylinder between the lower support roller and the bottom of the mounting groove, it can meet the leveling operations for soft steel such as plain carbon steel and high-strength steel such as alloy steel. In addition, upper and lower support rollers are provided at the top and bottom of the upper and lower working rollers, ensuring the synchronization of the transmission of the upper and lower working rollers.

[0035] In Example 1, a rolling line adjusting device 9 is provided between the top of the mounting groove and the upper support roller. It adopts the structural form of a wedge and a stepped plate, and the wedge and the stepped plate are driven by a hydraulic cylinder. By controlling the stroke of the hydraulic cylinder, the rolling line adjusting device is automatically set according to the roll diameter.

[0036] Example 2

[0037] The structure and principle of Example 2 are similar to those of Example 1. The differences are as follows: A work roll bending device 10 is provided on the circumferential sides of the upper work roll and the lower work roll. The work roll bending device provides positive and negative bending for the work roll, which has a good control effect on the intermediate wave and the two-side wave of the strip steel, enabling the skin pass mill to have sufficient ability to improve the strip shape. A fixed track is provided on the bending block of the work roll bending device, and rollers matching the fixed track are provided on the upper and lower work rolls. By the mutual cooperation of the rollers and the fixed track, the rollers can quickly move in and out of the frame along the fixed track when changing the rolls, for the quick roll change of the upper and lower work rolls.

[0038] In Examples 1-2, in order to ensure the stability of the strip steel before and after entering and exiting the in-line skin pass mill, a rolling line roll 11 and an entrance anti-wrinkle roll 12 are successively provided in the input direction of the strip steel, and an exit anti-twist roll 13 and a rolling line roll 11 are successively provided in the output direction of the strip steel; the stability of the strip steel before and after entering and exiting the skin pass mill is ensured, and no bad phenomena such as wrinkling or vibration will occur during the skin pass process, affecting the stability of production.

[0039] As Figures 2 to 3 shown, the present utility model also provides a quick roll extraction and roll change device.

[0040] Example 1

[0041] For the above-mentioned in-line skin pass mill;

[0042] It includes a roll stand cart 14 for loading work rolls and a driving cart 15 for pushing or pulling out the work rolls. The roll stand cart and the driving cart are located on the drive side A of the in-line skin pass mill, and the roll stand cart is located between the driving cart and the in-line skin pass mill. Hook heads 16 are provided at the ends of the upper and lower work rolls on the drive side, and a plurality of hooks 17 matching the hook heads are provided on the driving cart. Each hook is equipped with an independent hook hydraulic cylinder 18, and the hook hydraulic cylinder drives the hook to hook or release the hook head; the driving cart drives all the hooks to approach and move away from the hook heads at the ends of the upper and lower work rolls synchronously.

[0043] During the production process in this embodiment, when the work roll has surface defects after passing through the skin pass strip steel, this device can quickly extract the upper and lower work rolls from the frame for inspection. Since each hook in this device is equipped with an independent hook hydraulic cylinder for driving the hook to hook the hook head, this device can not only realize the simultaneous extraction and inspection of the upper and lower work rolls, but also realize the extraction and inspection of any one of the upper and lower work rolls. And during the roll extraction process, the strip steel is still in the frame, and the production process of the strip steel is not affected. Such inspection is very necessary for the operation and maintenance personnel in the steel mill. If small local defects are detected on the roll, they can be processed on the work roll stand cart, and for serious defects, the work roll will be moved to the roll grinding room for processing. During the installation and commissioning process, this device can also be used to push a single work roll in alone, and then check the parallelism between the entrance and exit rolling line rolls and the work roll.

[0044] The specific operation is as follows: when the upper and lower working rolls need to be pulled out or pushed in at the same time, the push roll cylinder inside the driving vehicle is driven to quickly advance to the front of the transmission side frame, and the upper hook and the lower hook are driven by their respective hook hydraulic cylinders to close and hook the hook heads at the ends of the upper and lower working rolls. Then open the locking mechanism of the upper and lower working rolls on the operating side, and the push roll cylinder is quickly retracted to quickly pull out the upper and lower working rolls; perform the opposite action when pushing in. When any of the upper and lower working rolls needs to be pulled out or pushed in, the driving vehicle is also advanced to the front of the frame, and only the hook head of the roller that needs to be pulled out needs to be hooked, and the other hook remains open. The working roll locking mechanism on the operating side is opened, and the push roll cylinder is quickly retracted again to achieve the pulling out of any working roll, and the opposite action is performed when pushing in.

[0045] Example 2

[0046] The structure and principle of Example 2 are similar to those of Example 1, except that it also includes a roll receiving vehicle 19 for receiving the old working rolls, and the roll receiving vehicle is located at the operating side B of the online leveling machine.

[0047] Without affecting the operation of the strip steel, the new working roll can be quickly pushed into the frame and the old working roll can be removed at the same time. Rapid roll changing can improve the success rate of the strip steel, which is crucial for continuous strip steel production units.

[0048] The specific operation of the roll change of this device is as follows: a pair of new working rolls are placed in the appropriate position on the upper and lower tracks of the roll frame car on the transmission side; before replacing the new working rolls, the upper and lower hooks of the roll pusher car are closed under the drive of their respective hydraulic cylinders, and the hooks just hook the hook heads at the ends of the upper and lower working rolls, and the old working rolls in the frame also fall on the fixed track on the bending roll block. At the same time, the working roll connecting car on the operating side also moves to the front of the frame and connects with the fixed track in the frame. After starting the roll change operation, the working roll locking device on the operating side is opened, and the pusher cylinder on the transmission side drives the lower driving car to move forward quickly, pushing the new working roll on the roll frame car into the frame. At the same time, because the new working roll pushes against the old working roll in the frame during the forward movement, when the new working roll moves into the frame from the transmission side, the old working roll moves from the frame to the working roll connecting car on the operating side. Then open the upper and lower working roll hooks, the transmission side pusher car quickly retreats, and before the connecting car on the operating side moves away from the frame, the working roll locking device on the operating side is locked, and the leveling machine is put into operation again.

[0049] In embodiments 1 and 2, two hooks are provided on the driving vehicle.

[0050] The above are only preferred embodiments of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of patent application of the present invention still fall within the protection scope of the present invention.

Claims

1. Rapid roll replacement device, used in online leveling machine; The online leveling machine includes frames distributed on both sides, and mounting grooves are provided on the frames; The upper support roller, the upper working roller, the lower working roller and the lower support roller are arranged horizontally and connected in sequence from top to bottom in the two frame mounting grooves. The bottom of the upper support roller is attached to the top of the upper working roller, and the top of the lower support roller is attached to the bottom of the lower working roller. A gap is left between the upper and lower support rollers for passing the strip steel. A pressing cylinder is provided between the bottom of the lower support roller and the bottom of each mounting groove, and the pressing cylinder is arranged vertically; A support roller balancing device is provided between the top of the frame and the top of the upper support roller; A working roll bending device is provided on the circumferential side of the upper working roll and the lower working roll, and the working roll bending device provides positive and negative roll bending for the working roll; a fixed track is provided on the bending block of the working roll bending device, and rollers matching the fixed track are provided on the upper and lower working rolls; Features: It includes a roll frame car for loading working rolls and a driving car for pushing or pulling the working rolls. The roll frame car and the driving car are located on the transmission side of the online leveling machine, and the roll frame car is located between the driving car and the online leveling machine. Hook heads are provided at the ends of the upper and lower working rolls on the transmission side, and a plurality of hooks matching the hook heads are provided on the driving car. Each hook is equipped with an independent hook hydraulic cylinder, and the hook hydraulic cylinder drives the hook to hook or release the hook head. The driving car drives all hooks to synchronously approach and move away from the hook heads at the ends of the upper and lower working rolls.

2. The rapid roller replacement device according to claim 1 is characterized in that: A rolling line adjustment device is provided between the top of the mounting groove and the upper support roller. The device adopts a structure of an inclined wedge and a step plate. The inclined wedge and the step plate are driven by a hydraulic cylinder. By controlling the stroke of the hydraulic cylinder, the rolling line adjustment device is automatically set according to the roller diameter.

3. The rapid roller replacement device according to claim 1 is characterized in that: A rolling line roller and an entrance anti-wrinkle roller are arranged in sequence in the input direction of the strip steel, and an exit anti-entanglement roller and a rolling line roller are arranged in sequence in the output direction of the strip steel.

4. The rapid roller replacement device according to claim 1 is characterized in that: A rolling line adjustment device is provided between the top of the mounting groove and the upper support roller. The device adopts a structure of an inclined wedge and a step plate. The inclined wedge and the step plate are driven by a hydraulic cylinder. By controlling the stroke of the hydraulic cylinder, the rolling line adjustment device is automatically set according to the roller diameter. A rolling line roller and an entrance anti-wrinkle roller are arranged in sequence in the input direction of the strip steel, and an exit anti-entanglement roller and a rolling line roller are arranged in sequence in the output direction of the strip steel.

5. The fast roller replacement device according to any one of claims 1 to 4, characterized in that: It also includes a roll receiving car for receiving old working rolls, which is located on the operating side of the online skin pass mill.

6. The rapid roller replacement device according to claim 5, characterized in that: There are two hooks on the driving vehicle.

7. The fast roller replacement device according to any one of claims 1 to 4, characterized in that: There are two hooks on the driving vehicle.

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