A hoisting device capable of simplifying the replacement operation of a rolling mill backup roll
Patent Information
- Application Number
- CN202521917795.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-07
- Publication Date
- 2026-10-16
- Estimated Expiration
- 2035-09-07
AI Technical Summary
[0004]目前存在的问题包括以下几点：首先，换辊支架的吊装较为困难，换辊支架体积大、重量重，没有专门的吊具，只能使用钢丝绳与天车连接吊装，钢丝绳吊装及吊装位置不同等原因会在一定程度上影响换辊支架与下支承辊的精确定位；其次，同时每次吊装换辊支架都需要人工站到换辊支架上摘挂钢丝绳，而上、下支承辊及换辊支架的吊装位置位于换辊地坑上方，距离地面较高，其与周边设备基础有一定的距离，作业人员在上下换辊支架及在换辊支架上摘挂钢丝绳的过程中，容易出现滑跌和高处坠落危险，作业困难且存在较大安全隐患；再有，吊装支承辊使用专用支承辊吊具，而吊装换辊支架时需要将专用支承辊吊具从天车上取下并换成钢丝绳吊装，整个作业过程需要反复倒换，职工工作量大、作业效率低，或者需要使用两台天车同时作业，费时费力，工序繁琐，严重影响轧机支承辊更换效率
本实用新型的四个吊耳分别固定连接在支承辊换辊支架的两个立柱上端的两侧，支承辊吊具的旋转吊钩可以通过吊耳吊装起换辊支架，不用再换钢丝绳吊装支承辊换辊支架；吊耳上方的吊钩导向板和上导向角可以引导支承辊吊具的旋转吊钩滑动到吊耳的下方，以便进入到吊耳的吊钩夹板中；吊耳的吊钩夹板的下导向角可以使旋转吊钩顺利进入两个吊钩夹板中间位置，旋转吊钩在两个吊钩夹板的夹持下对吊耳进行起吊；吊耳与轧机窗口内零部件、上支承辊轴承座底面不干涉，不影响正常的支承辊更换工序。
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Figure CN224858065U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a hoisting device that simplifies the replacement of rolling mill support rolls, and belongs to the technical field of rolling mill support roll maintenance equipment. Background Technology
[0002] Roller support rolls are used to support the work rolls and prevent them from bending or deforming, which could affect the quality and output of the plates and strips. They are one of the key pieces of equipment in hot strip mills and wide and medium-thick plate production lines. After a period of use, the roller support rolls will wear out. In order to control rolling accuracy and ensure product quality, the roller support rolls need to be replaced regularly.
[0003] When replacing rolling mill support rolls, it is usually necessary to use support roll lifting tools and roll changing brackets in combination. Support roll lifting tools can be used directly to lift the upper and lower support rolls. The rotating hook of the support roll lifting tool can be quickly connected and disconnected from the reserved lifting hole of the support roll bearing seat, which is convenient and fast. Roll changing brackets are used to support the upper and lower support rolls. During the process of supporting the upper and lower support rolls, the roll changing brackets need to be lifted repeatedly.
[0004] The existing problems include the following: First, the hoisting of the roller changing support is quite difficult. The roller changing support is large and heavy, and without specialized hoisting equipment, it can only be hoisted using wire ropes connected to an overhead crane. The wire rope hoisting method and the different hoisting positions can affect the precise positioning of the roller changing support and the lower support roller. Second, each hoisting of the roller changing support requires manual personnel to stand on the support to detach and attach the wire ropes. Furthermore, the hoisting positions of the upper and lower support rollers and the roller changing support are located above the roller changing pit, at a considerable distance from the ground, and are in close proximity to the foundations of surrounding equipment. Due to the fixed distance, workers are prone to slipping and falling from heights while moving up and down the roll changing support and attaching / removing wire ropes from it, making the operation difficult and posing significant safety hazards. Furthermore, while specialized support roll lifting tools are used for hoisting the support rolls, these tools must be removed from the overhead crane and replaced with wire ropes for hoisting the roll changing support. This process requires repeated switching, resulting in a heavy workload and low efficiency for workers. Alternatively, two overhead cranes may be needed simultaneously, which is time-consuming, labor-intensive, and cumbersome, severely impacting the efficiency of rolling mill support roll replacement. Therefore, there is an urgent need for a hoisting device that can overcome the difficulties of hoisting the roll changing support and solve the problems of construction safety and cumbersome procedures. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide a lifting device that simplifies the replacement of mill support rolls. This lifting device enables the support roll lifting tool and the support roll replacement bracket to be quickly positioned, constrained, connected and separated, and completes the rapid lifting and separation of the support roll replacement bracket. This eliminates the need to change the lifting tool and overhead crane during the entire support roll replacement process, and enables the rapid completion of the support roll replacement operation, eliminating safety hazards and improving the efficiency of mill support roll replacement.
[0006] The technical solution to the above technical problem is: A lifting device that simplifies the replacement of rolling mill support rolls includes a support roll changing bracket and lifting lugs. Each lifting lug includes a lifting plate and lifting hook plates. The lifting plate and lifting hook plates are rectangular plates. The lifting plate is placed horizontally, and two lifting hook plates are vertically welded to the lower surface of the lifting plate. The surfaces of the two lifting hook plates are parallel, and the distance between the two lifting hook plates matches the thickness of the rotating hook of the support roll lifting device. Four lifting lugs are fixedly connected to both sides of the upper ends of two columns of the support roll changing bracket. The rear ends of the lifting plates and lifting hook plates of the four lifting lugs are welded to the outer surfaces of the columns of the support roll changing bracket.
[0007] The above-mentioned hoisting device simplifies the replacement of mill support rolls. The distance between the two hook clamps of the hoisting lugs corresponds to the width of the support roll bearing seat. The front ends of the hoisting plates of the four hoisting lugs and the hook clamps are flush with the plane of the reserved hoisting hole of the support roll bearing seat. The center distance between the two hook clamps is perpendicular to the reserved hoisting hole of the support roll bearing seat. The lower ends of the inner side plates of the two hook clamps have inclined downward guide angles.
[0008] The above-mentioned hoisting device simplifies the replacement of mill support rolls. The hoisting lug also has a hook guide plate. The hook guide plate is a rectangular plate and is vertically welded to the middle of the upper surface of the hoisting plate. The rear end of the hook guide plate is welded to the outer surface of the support roll changing bracket column. The front end of the hook guide plate is flush with the front end of the hoisting plate of the hoisting lug. The front end of the hook guide plate has a backward-sloping upper guide angle.
[0009] The above-mentioned hoisting device, which simplifies the replacement of mill support rolls, has a gap between the lower bottom surface of the hook clamp plate and the internal components of the mill window, and a gap between the hook guide plate and the bottom surface of the upper support roll bearing seat above the support roll changing bracket.
[0010] The beneficial effects of this utility model are: The four lifting lugs of this invention are fixedly connected to the two upper ends of the two columns of the support roll changing bracket. The rotating hook of the support roll lifting device can lift the changing bracket through the lifting lugs without having to change the wire rope. The hook guide plate and upper guide angle above the lifting lugs can guide the rotating hook of the support roll lifting device to slide below the lifting lugs so that it can enter the hook clamp of the lifting lugs. The lower guide angle of the hook clamp of the lifting lugs can allow the rotating hook to smoothly enter the middle position of the two hook clamps. The rotating hook lifts the lifting lug under the clamping of the two hook clamps. The lifting lugs do not interfere with the parts inside the rolling mill window or the bottom surface of the upper support roll bearing seat, and do not affect the normal support roll changing process.
[0011] This utility model has a simple structure, is safe and reliable, is convenient and quick to operate, and facilitates precise positioning of the support roller replacement bracket. It can quickly and efficiently complete the hoisting and unhoisting of the support roller replacement bracket. The entire hoisting process of support roller replacement does not require changing the hoisting tools and overhead cranes, and does not require personnel to work near the edge to remove and hang the wire rope for hoisting the support roller replacement bracket. It can effectively reduce the workload of employees, eliminate safety hazards, and improve the hoisting efficiency of support roller replacement. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 A magnified view of a portion of the image; Figure 3 This is a schematic diagram of the spatial position structure of this utility model within the rolling mill window; Figure 4 This is a schematic diagram of the lateral movement of the support roller lifting device using this utility model; Figure 5 This is a schematic diagram of the support roller lifting device moving downwards using this utility model; Figure 6 This is a schematic diagram of the upward movement of the support roller lifting device using this utility model; Figure 7 This is a schematic diagram showing the connection between the support roller lifting device and the support roller changing bracket using the present invention. Figure 8 This is a schematic diagram of using the support roller lifting device of this utility model to lift the support roller changing bracket; Figure 9 This is a schematic diagram of the working space surrounding the support roller replacement and hoisting in the background technology. Figure 10 This is a schematic diagram of the structure of the upper and lower support rollers and the support roller changing bracket in the background art; The markings in the diagram are as follows: 1. Support roller changing bracket; 2. Column; 3. Lifting lug; 4. Lifting plate; 5. Lifting hook clamp; 6. Lifting hook guide plate; 7. Lower guide angle; 8. Upper guide angle; 9. Support roller lifting tool; 10. Rotating hook; 11. Support roller bearing seat reserved lifting hole; 12. Lower support roller; 13. Upper support roller; 14. Roller changing pit; 15. Equipment foundation. Detailed Implementation
[0013] This utility model consists of a support roller changing bracket 1 and a lifting lug 3.
[0014] Figure 1 , 2 The lifting lug 3 consists of a lifting plate 4, hook clamps 5, and hook guide plates 6. The lifting plate 4, hook clamps 5, and hook guide plates 6 are all rectangular plates. The lifting plate 4 is placed horizontally, and two hook clamps 5 are vertically welded to the lower surface of the lifting plate 4. The surfaces of the two hook clamps 5 are parallel, and the distance between the two hook clamps 5 matches the thickness of the rotating hook 10 of the support roller lifting device 9. The two hook clamps 5 can constrain the rotating hook 10 of the support roller lifting device 9 when lifting the lug 3, preventing the rotating hook 10 from sliding. The hook guide plate 6 is vertically welded to the middle of the upper surface of the lifting plate 4. The function of the hook guide plate 6 is to guide the rotating hook 10 downwards, preventing the lower end of the rotating hook 10 from hitting the upper surface of the lifting plate 4 of the lug 3.
[0015] Figure 1 , 2 As shown, the four lifting lugs 3 are fixedly connected to the two sides of the upper end of the two columns 2 of the support roller changer bracket 1, and the rear ends of the lifting plate 4, the hook clamp 5, and the hook guide plate 6 of the four lifting lugs 3 are welded to the outer surface of the column 2 of the support roller changer bracket 1.
[0016] Figure 1 , 2 The front ends of the lifting plates 4 and hook clamps 5 of the four lifting lugs 3 are flush with the plane of the reserved lifting holes 11 of the support roller bearing seat. This ensures that when the support lifting device 9 lowers to lift the reserved lifting holes 11 of the support roller bearing seat, the front ends of the lifting plates 4 and hook clamps 5 will not affect the lowering of the support lifting device 9. At the same time, the center distance between the two hook clamps 5 is perpendicular to the reserved lifting holes 11 of the support roller bearing seat, so that the rotating hook 10 of the support roller lifting device 9 can be aligned with the middle of the two hook clamps 5 of the lifting lugs 3 when lifting the support roller changing bracket 1. The rotating hook 10 lifts the lifting lugs 3 under the clamping of the two hook clamps 5.
[0017] Figure 1 , 2The lower ends of the inner surfaces of the two hook clamps 5 are respectively inclined with a lower guide angle 7. The lower guide angle 7 of the hook clamps 5 can guide the rotating hook 10 of the support roller hanger 9 to smoothly enter the middle position of the two hook clamps 5.
[0018] Figure 1 , 2 The front end of the hook guide plate 6 is flush with the front end of the lifting plate 4 of the lifting lug 3. The front end of the hook guide plate 6 has an upper guide angle 8 that tilts backward. The hook guide plate 6 and the upper guide angle 8 can guide the rotating hook 10 of the support roller lifting device 9 to slide below the lifting lug 3 so that the rotating hook 10 can enter the hook clamp 5 of the lifting lug 3.
[0019] Figure 3 The display shows that there is a gap between the bottom surface of the hook clamp plate 5 and the components inside the rolling mill window, and it does not interfere with the components inside the rolling mill window; there is a gap between the hook guide plate 6 and the bottom surface of the upper support roll bearing seat above the support roll changing bracket 1, and it does not interfere with the bottom surface of the upper support roll bearing seat; that is, the lifting lug 3 does not affect the normal support roll changing process.
[0020] Figure 4 , 5 As shown in figures 6, 7, and 8, the steps for replacing the rolling mill support rolls according to this utility model are as follows: Use the support roller lifter 9 to lift the upper support roller 13, and continue to use the support roller lifter 9 to lift the support roller changing bracket containing the lifting lug 3; The support roller lifting device 9 is moved so that the rotating hook 10 is located below the lifting lug 3, or so that the rotating hook 10 is located directly above the hook guide plate 6. The support roller lifting device 9 is lowered so that the rotating hook 10 contacts the upper guide angle 8 of the hook guide plate 6. The rotating hook 10 rotates as the support roller lifting device 9 is lowered and enters below the lifting lug 3. The support roller lifting device 9 is raised so that the rotating hook 10 contacts the lower surface of the lifting plate 4, and the support roller changing bracket 1 containing the lifting lug 3 is lifted away. Continue to lift the lower support roller 12 using the support roller lifting device 9; Continue to use the support roller lifting tool 9 to lift the support roller changing bracket 1 to above the lower support roller 12, lower the support roller lifting tool 9 and move it horizontally to remove it from the support roller changing bracket 1, and reinstall the new upper support roller 13; After the new upper support roller 13 is in place, the support roller lifting tool 9 is used to lift it off the support roller replacement bracket 1 and push in the lower support roller 12 to complete the support roller replacement.
[0021] Figure 9 , 10 As shown in the background art, the steps for replacing mill support rolls are as follows: After stopping the machine and removing the working roller, remove the lower support roller 12. Use a steel wire rope to connect to the overhead crane and hoist the support roller changing bracket 1 to the lower support roller bearing seat; The upper support roller 13 descends onto the support roller changing bracket 1, and the upper support roller 13 and the lower support roller 12 are pulled out. Use support roller hoist 9 to lift the upper support roller 13; use wire rope to connect with the overhead crane to lift the support roller changing bracket 1; use support roller hoist 9 to lift the lower support roller 12. Use the support roller hoist 9 to hoist the new lower support roller 12 into place, use a wire rope to connect with the overhead crane to hoist the support roller changing bracket 1 onto the new lower support roller 12, and use the support roller hoist 9 to hoist the new upper support roller 13 onto the support roller changing bracket 1. Push the new upper support roll 13, lower support roll 12 and support roll changing bracket 1 into the mill window; The operation is performed to lift the upper support roll 13 into position within the mill window, disengaging it from the support roll changing bracket 1, and then pulling out the new lower support roll 12 with the support roll changing bracket 1. Use a steel wire rope to connect to the overhead crane to lift off the support roller changing bracket 1; The new lower support roll 12 is pushed into place, completing the replacement of the mill support roll.
[0022] The aforementioned rolling mill support roll replacement and hoisting process involves numerous steps. The upper support roll 13 and lower support roll 12 can be directly hoisted using the support roll hoisting tool 9, allowing for quick and easy connection and separation between the rotating hook 10 and the pre-drilled hoisting hole 11 on the support roll bearing seat. However, hoisting the support roll replacement bracket 1 is more difficult. Firstly, there is no specialized hoisting tool; only a wire rope can be used to connect to the overhead crane for hoisting. Differences in wire rope hoisting and hoisting positions can affect the precise positioning of the support roll replacement bracket 1 and the lower support roll 12. Secondly, each hoisting operation requires manual intervention by standing on the support roll replacement bracket 1 to detach and reattach the wire rope, which is difficult and poses significant safety hazards. Finally, while a specialized support roll hoisting tool 9 is used for hoisting the support rolls, it must be removed from the overhead crane and replaced with a wire rope when hoisting the support roll replacement bracket 1. This process requires repeated switching, resulting in a heavy workload and low efficiency for workers.
[0023] An embodiment of this utility model is as follows: The lifting plate 4 of the lifting lug 3 is 620mm long, 880mm wide, and 80mm thick; The length of the hook clamp plate 5 of the lifting lug 3 is 620mm, the width is 245mm, the thickness is 80mm, the distance between the two hook clamp plates 5 is 260mm, and the lower guide angle 7 of the lower end of the two hook clamp plates 5 is 60 degrees. The length of the hook guide plate 6 of the lifting lug 3 is 620mm, the width is 150mm, the thickness is 80mm, and the upper guide angle 8 of the hook guide plate 6 is 60 degrees.
Claims
1. A hoisting device that simplifies the replacement of rolling mill support rolls, comprising a support roll changing bracket (1), characterized in that: It also has lifting lugs (3), which include a lifting plate (4) and a hook clamp (5). The lifting plate (4) and the hook clamp (5) are rectangular plates. The lifting plate (4) is placed horizontally, and the two hook clamps (5) are vertically welded to the lower surface of the lifting plate (4). The plates of the two hook clamps (5) are parallel, and the distance between the two hook clamps (5) matches the thickness of the rotating hook (10) of the support roller lifting device (9). The four lifting lugs (3) are fixedly connected to the two sides of the upper end of the two columns (2) of the support roller changing bracket (1). The rear ends of the lifting plate (4) and the hook clamps (5) of the four lifting lugs (3) are welded to the outer surface of the column (2) of the support roller changing bracket (1).
2. The hoisting device for simplifying the replacement of rolling mill support rolls according to claim 1, characterized in that: The distance between the two hook clamps (5) of the lifting lug (3) corresponds to the width of the support roller bearing seat. The front end faces of the lifting plate (4) and hook clamps (5) of the four lifting lugs (3) are flush with the plane of the reserved lifting hole (11) of the support roller bearing seat. The center distance between the two hook clamps (5) is perpendicular to the reserved lifting hole (11) of the support roller bearing seat. The lower ends of the inner side plates of the two hook clamps (5) have inclined lower guide angles (12).
3. The hoisting device for simplifying the replacement of rolling mill support rolls according to claim 2, characterized in that: The lifting lug (3) also has a hook guide plate (6). The hook guide plate (6) is a rectangular plate. The hook guide plate (6) is vertically welded to the middle of the upper surface of the lifting plate (4). The rear end of the hook guide plate (6) is welded to the outer surface of the column (2) of the support roller changer bracket (1). The front end of the hook guide plate (6) is flush with the front end of the lifting plate (4) of the lifting lug (3). The front end of the hook guide plate (6) has a backward tilting upper guide angle (13).
4. The hoisting device for simplifying the replacement of rolling mill support rolls according to claim 3, characterized in that: There is a gap between the bottom surface of the hook clamp plate (5) and the internal components of the rolling mill window, and there is a gap between the hook guide plate (6) and the bottom surface of the upper support roller bearing seat above the support roller change bracket (1).