Rapid roll changing device for pinch roll of rolling mill

Abstract

The utility model discloses a quick roll changing device for a pinch roll of a rolling mill, which belongs to the field of casting and rolling mill equipment and comprises a frame, a leading-out mechanism, a chain type slewing mechanism and a driving mechanism. The leading-out mechanism moves directionally on the frame. The chain type swing mechanism is arranged in the frame. And the driving mechanism is in transmission connection with the leading-out mechanism through a chain type slewing mechanism. The leading-out mechanism, the chain type rotating mechanism and the driving mechanism are integrated through the frame, power of the driving mechanism is transmitted to the leading-out mechanism by means of the circulating transmission characteristic of the chain type rotating mechanism, the leading-out mechanism drives the pinch roll to move directionally along the frame, and traction or pushing replacement of the pinch roll is achieved. Chained transmission replaces a traditional hydraulic transverse moving device, transverse space occupation is reduced, and the device adapts to the narrow working environment of the rolling mill.

Description

Technical Field

[0001] This utility model belongs to the field of casting and rolling mill equipment, specifically a quick roll changing device for the pinch rolls of a steel rolling mill. Background Technology

[0002] In the steel rolling process of steel production, pinch rolls, as a key equipment component, play a crucial role in conveying steel and precisely controlling the entry and exit of rolled pieces from the mill. However, with the development of modern rolling processes towards multi-variety, small-batch, and high-precision production, the wear problem of pinch rolls and the need for frequent replacement are becoming increasingly prominent. Especially when facing rolling tasks of different specifications, it is necessary to quickly switch to suitable roll specifications to meet process parameter requirements, which poses greater challenges to the replacement efficiency, ease of operation, and equipment adaptability of pinch rolls.

[0003] Currently, the replacement of pinch rolls in the industry generally relies on traditional operating methods: when rolls show wear or require size adjustments, the old roll assembly must be disassembled entirely using large hoisting equipment (such as overhead cranes or gantry cranes), and then the new roll assembly is hoisted to the designated work position for installation. Hoisting operations require coordination among multiple trades, and operators need to possess high levels of professional skills. Furthermore, the rolls are prone to collisions due to swaying during hoisting, posing risks of equipment damage and personnel safety. In addition, the narrow operating space of the rolling mill further restricts the mobility of hoisting equipment, increasing the difficulty of operation.

[0004] Patent CN206445457U discloses a quick roll changing device for the pinch rolls of a hot-roll steel coiler, including a roll changing lateral movement device, a roll changing base, and a bottom sliding track installed below the pinch rolls of the hot-roll steel coiler. After the telescopic end of the lateral movement hydraulic cylinder is assembled with the roll to be changed, the hydraulic cylinder drives the telescopic end to extend and retract, pulling the roll to be changed laterally out on the sliding track to achieve roll changing. However, in this roll changing device, the lateral movement hydraulic cylinder has a housing cylinder body and a telescopic end, requiring a large lateral space. Utility Model Content

[0005] The purpose of this invention is to provide a quick roll changing device for the pinch rolls of a rolling mill, so as to solve the problems mentioned in the prior art.

[0006] A quick roll changing device for the pinch rolls of a rolling mill is provided, comprising:

[0007] frame;

[0008] The export mechanism moves directionally on the frame;

[0009] A chain-type rotary mechanism is installed within the frame;

[0010] The driving mechanism is connected to the output mechanism via a chain rotary mechanism.

[0011] Furthermore, the export mechanism includes a slider and a hook, with the hook mounted on the slider. The slider is connected to a chain-type rotary mechanism. The export mechanism consists of a slider and a hook. The slider is driven by the chain-type rotary mechanism to move along the frame, and the hook fixes the clamping roller by mechanical gripping or hooking, achieving rapid separation / engagement of the roller body and the transmission mechanism.

[0012] Furthermore, the hook head is hinged to the slider. This hinged connection allows the hook head to self-adjust within a certain angle range, accommodating minor deviations in the roller's installation position. The hinged structure compensates for installation errors between the roller and the frame, preventing jamming due to misalignment.

[0013] Furthermore, the hook head is connected to the slider via a ball joint. Upgrading the hinge connection between the hook head and the slider to a ball joint connection gives the hook head multi-degree-of-freedom adjustment capabilities. The ball joint structure allows the hook head to be finely adjusted in multiple directions within space, adapting to changes in the roller posture under complex working conditions.

[0014] Furthermore, a guide rail is provided within the frame, and the slider is slidably connected to the guide rail. The guide rail within the frame allows the slider to move directionally along the guide rail via the sliding connection, restricting the movement trajectory of the output mechanism. The guide rail constrains the slider's direction of movement, preventing offset or jitter in the chain drive.

[0015] Furthermore, the guide rail comprises two symmetrically arranged channel steels, and the slider is equipped with a wheel train, which rolls within the channel steel of the guide rail. The guide rail uses symmetrical channel steels, and the wheel train (such as rollers or bearings) on the slider makes rolling contact with the inner wall of the channel steels. Rolling friction replaces sliding friction, reducing the slider's movement resistance and improving transmission efficiency. Symmetrical limiting on both sides of the channel steels automatically corrects slider misalignment, avoiding the risk of derailment.

[0016] Furthermore, the chain-type rotary mechanism includes a chain, a drive toothed roller, and a synchronous toothed roller. The chain meshes with both the drive toothed roller and the synchronous toothed roller, and the drive mechanism drives the drive toothed roller to rotate. The drive toothed roller rotates under the drive mechanism, and through the chain meshing, it drives the synchronous toothed roller to rotate synchronously, forming a closed-loop transmission.

[0017] Furthermore, the drive mechanism includes a reversing gearbox and a hand-cranked roller, which is connected to the drive toothed roller via the reversing gearbox. The hand-cranked roller changes the transmission direction and speed ratio through the reversing gearbox, driving the drive toothed roller to rotate. In manual drive mode, roller changing can still be completed in the event of power or hydraulic failure, resulting in higher equipment reliability.

[0018] Furthermore, the driving mechanism is a motor, which enables automated driving without the need for manual intervention.

[0019] Furthermore, support slides are provided on both sides of the frame. These support slides on both sides of the frame provide auxiliary support surfaces for the movement of the pinch rollers and limit the lateral displacement of the rollers.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] The frame integrates an export mechanism, a chain-type rotary mechanism, and a drive mechanism. Utilizing the cyclic transmission characteristics of the chain-type rotary mechanism, power from the drive mechanism is transmitted to the export mechanism, causing it to move the pinch rolls directionally along the frame, thus enabling the traction or pushing of the pinch rolls for replacement. The chain drive replaces the traditional hydraulic lateral movement device, reducing lateral space occupation and adapting to the narrow operating environment of the rolling mill. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this drawing or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this drawing. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of a quick roll changing device for the pinch rolls of a rolling mill.

[0024] In the diagram: 1. Frame; 11. Guide rail; 12. Support slide; 2. Outgoing mechanism; 21. Slider; 22. Hook; 3. Chain rotary mechanism; 31. Chain; 32. Drive toothed roller; 33. Synchronous toothed roller; 4. Drive mechanism; 41. Reversing gearbox; 42. Hand crank roller. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0026] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0027] However, there may be instances where unnecessary detailed descriptions are omitted. For example, detailed descriptions of well-known matters or repetitive descriptions of essentially the same structures may be omitted. This is to avoid unnecessarily lengthy descriptions and to facilitate understanding by those skilled in the art. Furthermore, the accompanying drawings and the following description are provided to enable those skilled in the art to fully understand this application and are not intended to limit the subject matter of the claims.

[0028] Please see Figure 1 As shown in the embodiment of this utility model, a quick roll changing device for a rolling mill pinch roll includes a frame 1, a guide mechanism 2, a chain rotary mechanism 3, and a drive mechanism 4. The guide mechanism 2 moves directionally on the frame 1. The chain rotary mechanism 3 is disposed within the frame 1. The drive mechanism 4 and the guide mechanism 2 are connected by transmission via the chain rotary mechanism 3.

[0029] The frame 1 of this device serves as the main support structure and is placed to the side of the rolling mill equipment. The chain-type rotary mechanism 3 forms a closed-loop transmission path within the frame 1, encircling both ends along its length. The drive mechanism 4 provides rotational power to the chain-type rotary mechanism 3. The guide mechanism 2 is fixed in place with the pinch roll to be pulled and moves directionally along the frame 1 with the movement of the chain-type rotary mechanism 3, pulling or pushing the pinch roll in and out of the rolling mill station. The chain drive system used in the chain-type rotary mechanism 3 eliminates the need for a laterally arranged hydraulic cylinder, significantly reducing the overall width of the device and making it suitable for the confined space of the rolling mill. The transmission of the chain-type rotary mechanism 3 supports the continuous reciprocating motion of the guide mechanism 2, greatly reducing the time required for a single roll change compared to traditional hoisting methods.

[0030] Specifically, the chain-type rotary mechanism 3 includes a chain 31, a drive toothed roller 32, and a synchronous toothed roller 33. The two ends of the annular path of the chain 31 mesh with the drive toothed roller 32 and the synchronous toothed roller 33, respectively. The tooth profiles of the drive toothed roller 32 and the synchronous toothed roller 33 can adopt a special tooth profile for double-row roller chains. Through the annular transmission path of the chain 31, the overall length of the roller changing device can be close to the length of the pinch roller, significantly reducing the space occupied by the roller changing device.

[0031] The delivery mechanism 2 includes a slider 21 and a hook 22. The slider 21 is fixed to a specific link of the chain 31 by bolts or clips, and the hook 22 is located at the front end of the slider 21. When the chain 31 drives the slider 21 to move, the hook 22 inserts into the groove or hook hole at the end of the pinch roll, fixing the roll body by mechanical locking or gravity self-locking. When changing rolls, the delivery mechanism 2 moves in the reverse direction, and the hook 22 drives the old roll away from the rolling mill. Then, a new roll is installed, pushing the new roll into the work station along the same path.

[0032] Furthermore, the hook head 22 is hinged to the slider 21 via a pin, and wing nuts are installed on both sides of the pin for fixation. When the hook head 22 contacts the pinch roller body, if there is an angular deviation, the hook head 22 can rotate around the pin by a certain angle to adaptively adjust until it is completely in contact with the groove of the roller body. The hook head 22 and the slider 21 are detachably connected by wing nuts, which facilitates the replacement of hook heads 22 of different specifications or with different mounting joints to adapt to different models of pinch rollers.

[0033] Furthermore, the hook head 22 is connected to the slider 21 via a ball joint. During the roll changing process, the hook head 22 can freely deflect within a certain cone angle range along the center of the ball, adapting to the inclined installation of the roll body or asymmetrical force conditions.

[0034] Two parallel steel sections are welded inside the frame 1 to serve as guide rails 11, forming a sliding pair between the slider 21 and the guide rails 11. When driven by the chain 31, the slider 21 moves directionally along the guide rails 11 through the sliding connection, restricting the movement trajectory of the output mechanism 2. The guide rails 11 constrain the movement direction of the slider 21, preventing deviation or jitter during chain 31 transmission.

[0035] Furthermore, the guide rail 11 is symmetrically arranged with U-shaped channel steel, and the channel steel openings form a guide channel inward. Four sets of V-shaped rollers are installed on both sides of the slider 21. The rollers are embedded in the inner wall of the channel steel and roll along the bottom of the channel. There is a certain gap between the side wall of the channel steel and the rollers. When the slider 21 deviates, the rollers contact the channel wall and generate a reverse force, which automatically corrects the position of the slider 21.

[0036] The drive mechanism 4 includes a reversing gearbox 41 and a hand-cranked roller 42. The reversing gearbox 41 uses a worm gear reduction mechanism, with its input shaft connected to the hand-cranked roller 42 and its output shaft driving the drive roller 32 via a coupling. During manual operation, rotating the hand-cranked roller 42 several times drives the chain 31 to move, while the worm gear's self-locking characteristic prevents the guide mechanism 2 from sliding down due to gravity. Through the worm gear reduction ratio, the torque requirement for hand-cranking operation is reduced, allowing a single person to change rollers.

[0037] Support slides 12 are provided on both sides of the frame 1, and the pinch rolls are slidably pulled out on the rolling mill. The support slides 12 are installed on both sides of the frame 1 and are parallel to the guide rails 11. During roll changing, the two sides of the pinch rolls overlap the upper surface of the support slides 12, and the roll body is pulled along the support slides 12 by the guide mechanism 2. The support slides 12 can eliminate the overturning moment caused by the offset of the pinch roll's center of gravity, and improve the stability during roll changing.

[0038] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A quick roll change device for a pinch roll of a rolling mill, characterized in that, Include: Frame (1); Lead-out mechanism (2) is oriented to move on the frame (1); Chain rotary mechanism (3) is arranged in the frame (1); Drive mechanism (4), the drive mechanism (4) and the lead-out mechanism (2) are drivingly connected through the chain rotary mechanism (3).

2. A quick roll change device for a pinch roll of a rolling mill according to claim 1, characterized in that, The lead-out mechanism (2) comprises a slider (21) and a hook (22), the hook (22) is arranged on the slider (21), and the slider (21) is drivingly connected with the chain rotary mechanism (3).

3. A quick roll change device for a pinch roll of a rolling mill according to claim 2, characterized in that, The hook (22) is hinged with the slider (21).

4. A quick roll change device for a pinch roll of a rolling mill according to claim 3, characterized in that, The hook (22) is ball-hinged with the slider (21).

5. A quick roll change device for a pinch roll of a rolling mill as claimed in claim 2, characterized in that, The frame (1) is provided with a guide rail (11), and the slider (21) is slidingly connected with the guide rail (11).

6. A quick roll change device for a pinch roll of a rolling mill according to claim 5, characterized in that, The guide rail (11) comprises two symmetrically arranged channel steels, and the slider (21) is provided with a wheel system, and the wheel system of the slider (21) rolls in the channel steel of the guide rail (11).

7. A quick roll change device for a pinch roll of a rolling mill as defined in claim 1, characterized in that, The chain rotary mechanism (3) comprises a chain (31), a driving tooth roller (32) and a synchronous tooth roller (33), the chain (31) is respectively engaged with the driving tooth roller (32) and the synchronous tooth roller (33), and the driving mechanism (4) is used to drive the driving tooth roller (32) to rotate.

8. A quick roll change device for a pinch roll of a rolling mill according to claim 7, characterized in that, The drive mechanism (4) comprises a reversing gear box (41) and a hand roller (42), and the hand roller (42) and the driving tooth roller (32) are drivingly connected through the reversing gear box (41).

9. A quick roll change device for a pinch roll of a rolling mill as defined in claim 7, characterized in that The drive mechanism (4) is a motor.

10. A quick roll change device for a pinch roll of a rolling mill as defined in claim 1, characterized in that, Both sides of the frame (1) are provided with support slides (12).

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