Rolling mill roll shaft dismounting and mounting device

Abstract

The invention relates to the technical field of rolling mill equipment maintenance, in particular to a rolling mill roll shaft dismounting and mounting device which comprises a tray seat, a main bracket group and an auxiliary supporting frame, the main bracket group is composed of a transverse strip seat, a main driving cylinder, a supporting lug seat and a movable supporting rod, and the two ends of the main driving cylinder stretch out and draw back in a guiding mode along sliding grooves of the transverse strip seat. And a four-connecting-rod lifting structure is formed through the supporting connecting rods. A first suction cup is arranged on the surface of the supporting lug base and used for conducting negative pressure adsorption on the lower surface of the rolling mill roll shaft and providing longitudinal anti-sliding support. The auxiliary supporting frame comprises a bearing lug seat, a supporting lug and a second suction cup, a ratchet pin groove and pin rod meshing structure is arranged between the supporting lug and the bearing lug seat, and the auxiliary supporting frame can be automatically locked to form lateral safety when the roller shaft deviates. The device further comprises a negative pressure control system, branch negative pressure adsorption can be provided for all the suction cups, and multi-point stable supporting is achieved. The device is stable in structure, high in safety and capable of effectively improving the alignment precision, lifting stability and operation reliability of dismounting and mounting operation of the rolling mill roll shaft.

Description

Technical Field

[0001] This invention relates to the field of rolling mill equipment maintenance technology, specifically a rolling mill roll assembly and disassembly device. Background Technology

[0002] As a key component of the steel rolling production line, the disassembly, installation, and maintenance of rolling mill rolls directly affect the operating efficiency and safety of the rolling mill equipment. In existing technologies, rolls are typically characterized by their large mass, long dimensions, high fulcrum, and limited installation space, making them prone to tipping, rolling, swaying, and difficulties in manual alignment during disassembly and assembly. Therefore, in industrial settings, lifting platforms, mechanical support frames, and multi-point clamps are commonly used to assist in the operation of the rolls.

[0003] Most existing roller-assisted assembly and disassembly equipment relies on a single lifting mechanism for raising and lowering, such as a support platform using a single cylinder or a lifting structure with a simple roller seat. While these structures can achieve height adjustment, they often lack a stable guiding mechanism during the lifting process, making it difficult to maintain a consistent roller posture. This can easily lead to swaying in the front-to-back or left-to-right directions, increasing the difficulty of operation during alignment and affecting installation accuracy. In addition, most existing lifting equipment is not equipped with a cushioning structure, which can easily cause impact when the roller is seated or lifted, resulting in damage to the roller surface or wear on the equipment.

[0004] Regarding the lateral stability of the roller, traditional devices typically use fixed supports, pressure blocks, or mechanical limiting components for lateral positioning. These limiting methods generally suffer from drawbacks such as high rigidity, poor buffering, and weak adaptability. When the roller unexpectedly tilts or shifts, the mechanical components cannot automatically adjust the structural position in time, nor can they provide a locking function, making the roller prone to dangerous situations such as tipping over or slipping, posing significant safety hazards.

[0005] Regarding adsorption-type auxiliary structures, some equipment has begun to use negative pressure suction cups for position fixation. However, this relies on only a small number of suction cups to provide adsorption force, lacking a systematic multi-point collaborative design. Furthermore, the suction cup deflection angle is insufficiently limited, resulting in poor adaptability to different roller postures or surface angles. Simultaneously, most existing negative pressure systems lack branch control and group collaboration capabilities, making it difficult to achieve independent switching between lower and side adsorption. In view of this, this paper studies and improves upon existing problems, providing a rolling mill roller disassembly and assembly device to solve the current issues. Summary of the Invention

[0006] This invention aims to overcome the technical defects of existing rolling mill roll assembly and disassembly auxiliary equipment, such as insufficient lifting stability, lack of lateral safety capability, and weak anti-slip fixing capability. This invention provides a rolling mill roll assembly and disassembly device, which provides stable lifting through the main support frame group, automatic safety limit through the auxiliary support frame, and combines a multi-point negative pressure adsorption system to achieve safe, stable and efficient operation in the roll assembly and disassembly process.

[0007] The purpose of this invention is to provide an auxiliary device that can achieve precise lifting, anti-tipping protection, stable adsorption and locking, and adapt to multiple specifications of rollers, thereby solving the problems of easy swaying, easy tipping, difficult positioning and insufficient adsorption of rollers in the prior art, and improving the safety and reliability of rolling mill on-site operations.

[0008] To achieve the above objectives, the present invention provides a rolling mill roll assembly / disassembly device, comprising a tray base, a main support frame, and a secondary support frame. The main support frame is used to support and lift the roll, the secondary support frame is used to achieve lateral limiting and anti-tipping protection of the roll, and the suction cup assembly and negative pressure control system are used to construct a stable multi-point adsorption system, making the entire assembly / disassembly process safer and smoother.

[0009] The device employs a three-pronged approach of lifting, limiting, and adsorption. Through a control mode that combines structural motion with negative pressure adsorption, the roller maintains a stable posture and uniform force during disassembly, handling, and installation, achieving efficient and reliable auxiliary operations.

[0010] In a preferred embodiment, the device of the present invention includes a tray base, a main support assembly, and a secondary support frame. The main support assembly consists of a crossbar base, a main drive cylinder, a lug base, and a movable support rod. The roller shaft is stably lifted by the extension and retraction of the main drive cylinder and a four-bar linkage guiding mechanism. A first suction cup is provided on the surface of the lug base for negative pressure adsorption on the lower surface of the roller shaft. The secondary support frame includes a bearing base, a support lug, and a second suction cup. Lateral limiting and safety protection of the roller shaft are achieved through a ratchet pin groove structure. This realizes multiple synergies of lifting, lateral stabilization, anti-tipping protection, and adsorption positioning of the roller shaft, greatly improving the overall safety and load-bearing stability of the device.

[0011] In a preferred example, a jack is provided at the bottom of the pallet seat, and a support base is provided at the bottom of the jack for fixing to the rolling mill working platform. The pallet seat and the roller can be precisely aligned by fine adjustment of the height, and the overall stability and support performance of the device can be improved. This ensures that the pallet seat can be stably supported in different height positions, and makes the lifting and limiting actions during the roller assembly and disassembly process more accurate and reliable.

[0012] In a preferred example, both the first and second suction cups employ a silicone negative pressure structure, with each suction cup end connected to a negative pressure pump assembly to create a stable suction force. The suction cups are arranged along the long axis of the tray base, forming multi-point negative pressure locking according to the roller shaft length, achieving multi-point suction below and to the sides of the roller shaft, forming a stable anti-slip and anti-rolling support, and improving the stability of the lifting posture.

[0013] In a preferred example, a ratchet groove is formed on the surface of the support lug. The ratchet groove is arranged along an arc array and engages with the pin at the end of the support lug seat. When the roller shaft shifts or tends to overturn, the support lug automatically slides into the engagement position to form a self-locking limit. When the roller shaft tilts abnormally, the safety lock can be automatically activated to prevent the roller shaft from tipping over, significantly improving operational safety.

[0014] In a preferred example, the main drive cylinder, the lug seat, and the support linkage form a symmetrically arranged four-bar linkage. When the main drive cylinder extends or retracts, it is guided by the slide groove to achieve stable movement of the lug seat and avoid lifting sway, ensuring that the roller lifting path is stable and the posture is controlled, so that the roller remains stable during lifting and alignment, thereby improving the assembly and disassembly accuracy.

[0015] In a preferred example, the surface of the support ear is provided with a limiting card, and the bottom surface of the second suction cup is provided with a rotating ear and a limiting claw. The rotating ear can be freely deflected, while the limiting card and the limiting claw limit the deflection range, so that the suction cup does not rotate excessively while adapting to the change of the roller position, ensuring that the adhesion angle of the suction cup is always within a safe range during actual operation, and avoiding negative pressure adsorption failure due to excessive deflection.

[0016] In a preferred example, the moving strut adopts an elastic telescopic strut structure and is connected to the lug seat in a hinged manner, providing cushioning and shock absorption performance when lifting or placing the roller, effectively absorbing the instantaneous impact force of the roller during the lifting or placement process, and improving the durability and stability of the overall structure in long-term operation.

[0017] In a preferred example, the ends of the first and second suction cups are connected to a negative pressure distribution valve through a negative pressure control system. The negative pressure control system can supply pressure to different suction cups in separate circuits, realize the switching of adsorption modes and the adjustment of adsorption intensity, and provide a more flexible negative pressure adsorption method for the roller under different working conditions, making the entire fixing system more stable, reliable and adaptable.

[0018] The beneficial effects achieved by this invention are as follows: 1. In this invention, the four-bar linkage guiding mechanism formed by the main drive cylinder, the lug seat and the support link in the main bracket assembly realizes the stable lifting and precise displacement of the roller shaft during the lifting process. Combined with the elastic buffer of the moving support rod, the roller shaft is lifted smoothly without impact, which significantly improves the safety and operational efficiency of the roller shaft disassembly and assembly operations.

[0019] 2. In this invention, the auxiliary support frame adopts a ratchet-pin groove-pin engagement structure between the support lug and the bearing seat. When the roller shaft deviates or tends to tip over, it can automatically lock and form an emergency limit. Together with the deflection limit device composed of the limit card, the rotating lug and the limit claw, it can achieve double-sided safety protection and effectively avoid the risk of the roller shaft tipping over during operation.

[0020] 3. In this invention, both the first and second suction cups adopt negative pressure adsorption and are uniformly supplied with pressure by the negative pressure control system, forming a multi-point fixing structure of lower and lateral adsorption of the roller shaft, which can effectively prevent the roller shaft from rolling, slipping and rotating, and significantly improve the stability and reliability of the entire disassembly and assembly process. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present invention; Figure 2 This is a schematic diagram of the bottom structure of a tray seat according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the main bracket assembly structure according to an embodiment of the present invention; Figure 4 This is a partial structural diagram of the main bracket assembly according to an embodiment of the present invention; Figure 5 This is a schematic diagram of a tray base and its surface support structure according to an embodiment of the present invention; Figure 6 This is a schematic diagram of a secondary support structure according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the surface structure of the lug according to an embodiment of the present invention.

[0022] Figure label: 100. Pallet holder; 110. Jack assembly; 200. Main bracket assembly; 210. Crossbar seat; 220. Main drive cylinder; 230. Lug seat; 240. Moving strut; 211. Support connecting rod; 212. Slide groove; 231. First suction cup; 300. Secondary support frame; 310. Ear support; 320. Support ear; 330. Second suction cup; 311. Pin rod; 321. Ratchet groove; 322. Limiting clip; 331. Rotary ear; 332. Limiting claw. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0024] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the invention.

[0025] The following describes, with reference to the accompanying drawings, some embodiments of a rolling mill roll assembly / disassembly device provided by the present invention.

[0026] Combination Figure 1 - Figure 7 As shown, the present invention provides a rolling mill roll assembly and disassembly device, including a pallet seat 100, a main support frame 200 and a secondary support frame 300, both of which are fixedly installed on the surface of the pallet seat 100.

[0027] The pallet seat 100 serves as the basic load-bearing structure of the device, used to support the main lifting and lateral limiting mechanisms. A jack 110 is provided on the bottom surface of the pallet seat 100 to fix the device below the rolling mill and adjust its overall height.

[0028] The main support assembly 200 is installed in the central area of ​​the pallet seat 100 and is the core mechanism of the present invention that bears the main load of the roller. The main support assembly 200 includes a crossbar seat 210, a main drive cylinder 220, a lug seat 230, and a movable support rod 240.

[0029] A groove 212 is formed on the surface of the crossbar seat 210. The main drive cylinder 220 has sliders at both ends, which are slidably mounted on the surface of the support rod 211 and guided along the groove 212. A support rod 211 is provided at the bottom of the lug seat 230, with its two ends rotatably connected to both the crossbar seat 210 and the lug seat 230 to form a stable four-bar linkage lifting mechanism. The surface of the lug seat 230 is also provided with multiple first suction cups 231 for adsorbing the lower surface of the roller shaft.

[0030] The auxiliary support frame 300 is located on the left and right sides of the tray base 100 and is the safety structure for lateral anti-tipping protection of the roller shaft in this invention. The auxiliary support frame 300 includes a bearing seat 310, a support ear 320, and a second suction cup 330 rotatably mounted on the end of the support ear 320. The bearing seat 310 has pins 311 at both ends, and the support ear 320 has a ratchet groove 321 on its surface. The support ear 320 is sleeved on the surface of the bearing seat 310 and can move relative to it. The ratchet groove 321 and the pin 311 can be engaged and limited. Multiple second suction cups 330 are symmetrically arranged on both sides of the main bracket assembly 200 for double-sided adsorption of the roller shaft.

[0031] like Figure 1 and Figure 2 As shown, a jack component 110 is fixed to the bottom of the tray base 100.

[0032] The lower end of the jack 110 is equipped with a support seat for fixing to the surface of the rolling mill platform. The support seat can provide accurate alignment according to the installation position of the rolling mill. The jack 110 can achieve the following functions through lifting and adjustment: accurately aligning the height of the pallet seat 100 with the roller position; providing additional stability during disassembly and assembly; and preventing the device from slipping or shifting at an angle.

[0033] like Figures 3-7 As shown, this invention uses a first suction cup 231 and a second suction cup 330 for downward and side suction of the roller shaft. Both are made of silicone and employ a negative pressure suction cup structure, with the suction surface flexibly conforming to the roller shaft surface, effectively preventing slippage and rolling.

[0034] Each suction cup is connected to a negative pressure pump unit at its end, and the negative pressure output is controlled by a negative pressure distribution valve. The negative pressure system can achieve the following: downward suction from the first suction cup 231 provides longitudinal stability; side suction from the second suction cup 330 provides lateral safety; simultaneous operation of multiple negative pressure points provides redundant safety; and rapid unloading of negative pressure improves disassembly and assembly efficiency. The suction cups are arranged along the long axis of the tray base 100 to accommodate rollers of different lengths.

[0035] like Figure 6 and Figure 7 As shown, the inner side of the support lug 320 is provided with ratchet grooves 321 arranged in an arc-shaped array, and the tooth surface of each ratchet groove engages with the pin 311 at the end of the bearing seat 310. This structure has the following characteristics: the support lug 320 can swing freely during the roller lifting stage; when the roller tends to tilt, the ratchet grooves 321 automatically slide into the pin 311, forming a self-locking limit; the self-locking structure can prevent the roller from continuing to tilt, which is the most critical safety protection structure of the auxiliary support 300; the arc-shaped grooves improve the smoothness of engagement and load-bearing capacity.

[0036] like Figure 3 and Figure 4 As shown, the main drive cylinder 220 is a hydraulic drive rod structure, with moving support rods 240, lug seats 230 and four support connecting rods 211 symmetrically arranged on both sides.

[0037] The main drive cylinder 220 provides the main lifting force: the extension and retraction of the main drive cylinder 220 drives the overall lifting of the support 230, realizing the main lifting action of the roller.

[0038] The supporting links 211 form a four-bar linkage, arranged in parallel pairs; this keeps the lug seat 230 in a stable position; it prevents swaying and tilting during the lifting process; and it increases the load-bearing capacity.

[0039] The 240mm movable support rod is elastically telescopic and used to buffer the impact of the roller shaft settling and lifting, thereby improving operational stability.

[0040] like Figure 6As shown, a limiting clip 322 is fixedly provided on the surface of the support ear 320, and the bottom surface of the second suction cup 330 is rotatably connected to the support ear 320 via a rotating ear 331. A limiting claw 332 is also provided on the surface of the second suction cup 330. These three components constitute a limiting mechanism for suction cup deflection: the second suction cup 330 can deflect freely within an allowable range to adapt to the roller posture; the limiting clip 322 contacts the limiting claw 332 to limit the maximum deflection angle of the suction cup; preventing the suction cup adsorption surface from detaching due to excessive deflection. This structure further enhances the safety and reliability of the auxiliary support frame 300.

[0041] In this embodiment, the movable support rod 240 is hinged to both ends of the lug seat 230 and the main drive cylinder 220. Its body is an elastic telescopic structure, which provides shock absorption function in the following stages: absorbing the impact when the roller sits down; buffering the roller during the process of the main drive cylinder lifting the roller; and coordinating the support rod 211 to keep the lug seat 230 stable when the roller swings slightly.

[0042] In this embodiment, the negative pressure control system is connected to the ends of all first suction cups 231 and second suction cups 330. The negative pressure pump group, negative pressure pipeline, and negative pressure distribution valve system can group and pressurize different suction cups to achieve: lower adsorption main support; side adsorption safety protection; full suction cup negative pressure mode for high-risk working conditions; and pressure relief control to achieve rapid release of suction cups.

[0043] Working principle of this invention: This invention utilizes a lifting mechanism formed by the main support assembly 200 to achieve primary load-bearing and displacement control of the roller shaft. The linear thrust output by the main drive cylinder 220 is guided along the groove 212 on the surface of the crossbar seat 210, causing the lug seat 230 to rise or fall along a fixed trajectory. The four supporting links 211 at the bottom of the lug seat 230 form a four-bar linkage guiding structure, ensuring that the roller shaft maintains a stable posture during lifting and preventing lateral swaying. The moving support rod 240 acts as an elastic buffer, absorbing impact force during roller shaft contact or lifting, making the overall lifting action smoother, thereby ensuring precise and stable lifting control of the roller shaft throughout the entire assembly and disassembly process.

[0044] The auxiliary support 300 employs a ratchet groove 321 and a pin 311 meshing structure as an active anti-tipping mechanism. When the roller shaft is subjected to external force or tilting tendency and becomes laterally deflected, the ratchet groove structure between the support lug 320 and the bearing seat 310 automatically slides down and engages with the pin 311, forming a self-locking limit and preventing the roller shaft from tilting further. Simultaneously, the second suction cup 330, through a limiting mechanism consisting of a rotating lug 331, a limiting clip 322, and a limiting claw 332, can freely deflect within a certain angle range to adapt to changes in the roller shaft's posture. When it exceeds the safe range, it is restricted, preventing excessive deflection of the suction cup and subsequent adhesion failure. This structure allows the auxiliary support 300 to automatically intervene when the roller shaft experiences abnormal deviation, forming a highly reliable safety guarantee.

[0045] This invention provides stable negative pressure to the first suction cup 231 and the second suction cup 330 through a negative pressure control system, enabling the roller shaft to simultaneously adhere at multiple points below and on both sides. The first suction cup 231 adheres to the lower surface of the roller shaft, providing longitudinal anti-slip constraint to prevent the roller shaft from rolling or rotating during the lifting section. The second suction cup 330 adheres to the sidewalls of the roller shaft on both sides, enhancing lateral stability and forming redundant protection in conjunction with the mechanical limiting structure. The negative pressure distribution valve can adjust the adsorption state of different suction cup groups as needed, realizing lower adsorption, double-sided adsorption, or full adsorption coordinated modes, thereby maintaining the roller shaft in a stable posture throughout the assembly and disassembly process, significantly improving safety and operational reliability.

[0046] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A mill roll shaft dismounting device, characterized in that, Include: Tray seat (100) and fixedly installed on the surface of the tray seat (100) main bracket group (200) and vice support (300); The main bracket group (200) includes a crossbar seat (210), a main drive cylinder (220) and a lug seat (230), and a movable support rod (240) rotatably installed at both ends of the main drive cylinder (220); The surface of the crossbar seat (210) is provided with a sliding groove (212), the bottom surface of the lug seat (230) is provided with a support connecting rod (211) rotatably connected with the surface of the crossbar seat (210), and the both ends of the main drive cylinder (220) are provided with sliding blocks rotatably installed on the surface of the support connecting rod (211). The vice support (300) includes an ear support (310), an ear (320), and a second suction cup (330) rotatably installed at one end of the ear (320), the surface of the ear (320) is provided with a ratchet tooth slot (321) and is movably sleeved on the surface of the ear support (310), and a plurality of second suction cups (330) are symmetrically arranged on both sides of the main bracket group (200) for double-sided auxiliary support of the rolling mill roll shaft.

2. The mill roll shaft dismounting device according to claim 1, characterized in that The bottom surface of the tray seat (100) is provided with a jack (110), and one end of the jack (110) is provided with a support seat for fixing on the surface of the rolling mill working platform.

3. The mill roll shaft dismounting device according to claim 1, characterized in that, The surface of the lug seat (230) is provided with a first suction cup (231) for adsorbing the surface of the rolling mill roll shaft, the first suction cup (231) and the second suction cup (330) are both negative pressure suction cup structures made of silica gel, each suction cup end is connected with a negative pressure pump group, and a plurality of first suction cups (231) and second suction cups (330) are arranged along the long axis direction of the tray seat (100).

4. The mill roll shaft dismounting device according to claim 3, characterized in that The end of the first suction cup (231) and the second suction cup (330) is connected with a negative pressure control system, the negative pressure control system includes a negative pressure distribution valve connected with a negative pressure pipeline, and is used for providing stable negative pressure adsorption force for each suction cup.

5. The mill roll shaft dismounting device according to claim 1, characterized in that, Both ends of the ear support (310) are provided with a pin rod (311), the ratchet tooth slot (321) is arranged in an arc array on the surface of the ear (320), the ratchet tooth slot (321) forms an arc tooth groove structure for engaging with the surface of the pin rod (311).

6. The mill roll shaft dismounting device according to claim 1, characterized in that The main drive cylinder (220) is a hydraulic drive rod structure; the number of support connecting rods (211), lug seats (230) and movable support rods (240) is two groups and is symmetrically arranged on both sides of the main drive cylinder (220); the number of support connecting rods (211) is four, and two are arranged in parallel, and both ends of the support connecting rod (211) are rotatably connected with the surface of the lug seat (230) and the crossbar seat (210).

7. The mill roll shaft dismounting device according to claim 1, characterized in that, The surface of the supporting lug (320) is fixedly provided with a limiting clamp (322); the bottom surface of the second suction disc (330) is provided with a rotating lug (331) which is rotatably arranged on the surface of the supporting lug (320); and the surface of the second suction disc (330) is provided with a limiting claw (332) which is in sliding abutment with the limiting clamp (322) and is used for limiting the maximum deflection angle of the second suction disc (330).

8. The mill roll shaft dismounting device according to claim 1, characterized in that, The dynamic supporting rod (240) is connected with the lug seat (230) in a hinged manner, and the dynamic supporting rod (240) is a structure of an elastic telescopic rod.

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