A stable lifting device for rolling mill maintenance

Abstract

The utility model provides a kind of stable hoisting equipment for rolling mill maintenance, it is related to hoisting equipment field, comprising: lifting assembly, lifting assembly is composed of lifting hook mechanism and lock catch mechanism, lifting hook mechanism can automatically change the use state of lock catch mechanism according to actual hoisting condition, when hoisting and lifting etc. Operation is carried out to rolling mill accessory, lock catch mechanism can be self-locking and seal the gap of dismounting, to realize the function of reliable anti-drop of hoisting load, hoisting and lifting are stable, when hoisting and lifting operation is not carried out, lock catch mechanism is automatically unlocked, so that safety stop lever can be bidirectional rotation, so that rolling mill lifting ring can be directly placed or taken when carrying out dismounting operation with lifting hook, without artificial operation safety stop lever avoidance, simplify operation process, solve the problem that hoisting equipment needs to remove the connection of lifting hook and rolling mill lifting ring, must be manually pressed by artificial safety stop catch inward, to make lifting ring separate from lifting hook, step is complicated.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, and in particular to a stable lifting device for rolling mill maintenance. Background Technology

[0002] Rolling mills are key equipment used in metallurgy, machining and other industries to roll metal billets. Through the pressure of the rolls, the billets undergo plastic deformation to obtain the required plates, profiles and other products. During the long-term use of rolling mills, regular or irregular maintenance is required to ensure the normal operation of the equipment. Maintenance often involves the disassembly, replacement and installation of heavy components such as rolls, bearing housings, gearboxes and so on. These components are large and heavy, and are difficult to handle manually. Therefore, stable lifting equipment is needed to hoist them to achieve precise displacement and alignment of the components, provide convenience for maintenance operations and ensure that maintenance work is carried out efficiently and safely.

[0003] Bridge cranes are commonly used lifting equipment in rolling mill maintenance, especially suitable for hoisting heavy components such as rolls and gearboxes. They connect to pre-installed lifting rings on the rolling mill components via hooks, enabling hoisting and lifting operations. The working principle of a bridge crane involves using a bridge frame (main beam) erected on rails on both sides of the workshop ceiling as a load-bearing and moving foundation. The bridge frame can move longitudinally along the rails, and a laterally movable trolley is mounted on it. The trolley is equipped with a hoisting mechanism (composed of a motor, reducer, drum, etc.), connected to a hook via a wire rope. The hook connects to the pre-installed lifting rings on the rolling mill components. During operation, the motor drives the drum to rotate, retracting and extending the wire rope, thus lifting and lowering the load. Simultaneously, by utilizing the longitudinal movement of the bridge frame and the lateral movement of the trolley, heavy objects can be transferred to different locations within the workshop, meeting the needs of hoisting, relocating, and aligning components during rolling mill maintenance.

[0004] For existing rolling mill maintenance lifting equipment, the safety catch of the hook mostly adopts a one-way rotation structure, which restricts the rotation direction to only the inside of the hook body. This is to achieve reliable anti-detachment of the load. However, in actual operation, when it is necessary to disconnect the hook from the rolling mill lifting ring, the safety catch must be manually pressed inward to disengage the lifting ring from the hook. The whole operation process is not only cumbersome, but also consumes extra manpower and time. Especially in the case of frequent lifting operations during rolling mill maintenance, it is difficult to meet the needs of efficient operation, has poor flexibility, and is not very practical. Summary of the Invention

[0005] This utility model relates to a stable lifting device for rolling mill maintenance, which has a lifting component. The hook mechanism can automatically change the usage state of the locking mechanism according to the actual lifting conditions. When lifting rolling mill parts, the locking mechanism can self-lock to seal the installation and removal gap, thereby achieving a reliable anti-detachment function for the load and ensuring stable lifting. When no lifting operation is being performed, the locking mechanism automatically unlocks, allowing the safety stop bar to rotate in both directions. Thus, when the rolling mill lifting ring is installed or removed from the lifting hook, it can be directly placed or removed without the need for manual operation of the safety stop bar to avoid it. This simplifies the operation process, improves work efficiency, and is highly flexible and practical.

[0006] This utility model provides a stable lifting device for rolling mill maintenance, specifically including: a lifting assembly and a connecting wire rope. The lifting assembly consists of a hook mechanism and a locking mechanism. The hook mechanism includes a lifting hook, a connecting seat, and a linkage gear. The top of the connecting seat is connected to a bridge crane via the connecting wire rope, and the connecting seat is inserted into the top of the lifting hook. The linkage gear is rotatably connected inside the lifting hook. The locking mechanism includes a safety stop bar and an adaptive locking block. The safety stop bar is rotatably connected to the bottom of the lifting hook and is inserted into the inside of the lifting hook.

[0007] Furthermore, the lifting hook has a disassembly notch on its side, a safety stop bar is located at the bottom of the disassembly notch, and an adaptive locking block is located at the top of the disassembly notch.

[0008] Furthermore, a center torsion spring is provided outside the rotating shaft of the safety stop bar. The two ends of the center torsion spring are fixedly connected to the inside of the safety stop bar and the inside of the lifting hook, respectively. Under the action of the center torsion spring, when the safety stop bar is not moved by external force, the safety stop bar is in a vertical state and is located directly below the adaptive locking block.

[0009] Furthermore, the sides of the adaptive lock block and the connecting seat are provided with synchronous racks, and the teeth on both sides of the linkage gear mesh with the teeth of the synchronous racks of the adaptive lock block and the connecting seat respectively.

[0010] Furthermore, the connecting seat is provided with an unlocking spring inside, and the two ends of the unlocking spring are respectively fixedly connected to the bottom of the connecting seat and the inside of the lifting hook.

[0011] Furthermore, the bottom of the adaptive locking block is provided with a locking groove, and when the connecting seat is not pulled up by external force, the locking groove separates from the top of the safety stop bar, and the locking groove is located directly above the safety stop bar.

[0012] This utility model provides a stable lifting device for rolling mill maintenance, which has the following beneficial effects:

[0013] The hook mechanism can automatically change the usage state of the locking mechanism according to the actual lifting conditions. When lifting or hoisting rolling mill parts, the locking mechanism can self-lock to seal the installation and removal gap, thereby achieving a reliable anti-detachment function for the load and improving lifting stability. When no lifting or hoisting operation is being performed, the locking mechanism automatically unlocks, allowing the safety stop to rotate in both directions. Thus, when the rolling mill lifting ring is installed or removed from the lifting hook, it can be placed or removed directly without the need for manual operation of the safety stop to avoid it. This simplifies the operation process, improves work efficiency, and enhances the flexibility and practicality of the device. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0015] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the scope of the present invention.

[0016] In the attached diagram:

[0017] Figure 1 A schematic diagram of the structure of this utility model is shown.

[0018] Figure 2 This diagram shows the internal structure of the present invention when no hoisting or lifting operation is being performed.

[0019] Figure 3 A schematic diagram of the disassembled lifting component of this utility model is shown.

[0020] Figure 4 This invention provides a schematic diagram of the internal structure of a rolling mill component during hoisting and lifting.

[0021] Figure 5 This utility model is shown Figure 2 A schematic diagram of the structure when the lifting ring of the rolling mill component is placed inside the lifting hook.

[0022] Figure 6 This utility model is shown Figure 2 A schematic diagram showing the result when the lifting ring of the rolling mill component is removed from the inside of the lifting hook.

[0023] List of reference numerals

[0024] 1. Hook mechanism; 101. Lifting hook; 1011. Installation / removal notch; 102. Connecting seat; 1021. Synchronizing rack; 1022. Unlocking tension spring; 103. Linkage gear;

[0025] 2. Locking mechanism; 201. Safety stop bar; 2011. Neutral torsion spring; 202. Adaptive locking block; 2021. Locking groove;

[0026] 3. Connect the steel wire rope. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] Please refer to Figures 1 to 6 Example 1:

[0029] This utility model proposes a stable lifting device for rolling mill maintenance, including: a lifting assembly and a connecting wire rope 3. The lifting assembly consists of a hook mechanism 1 and a locking mechanism 2. The hook mechanism 1 includes a lifting hook 101, a connecting seat 102 and a linkage gear 103. The top of the connecting seat 102 is connected to a bridge crane via the connecting wire rope 3, and the connecting seat 102 is inserted into the top of the lifting hook 101. The linkage gear 103 is rotatably connected inside the lifting hook 101. The locking mechanism 2 includes a safety stop bar 201 and an adaptive locking block 202. The safety stop bar 201 is rotatably connected to the bottom of the lifting hook 101 and is inserted into the inside of the lifting hook 101.

[0030] The lifting hook 101 has a disassembly notch 1011 on its side, a safety stop bar 201 is located at the bottom of the disassembly notch 1011, and an adaptive locking block 202 is located at the top of the disassembly notch 1011.

[0031] The safety stop bar 201 has a central torsion spring 2011 on its outer side. The two ends of the central torsion spring 2011 are fixedly connected to the inside of the safety stop bar 201 and the inside of the lifting hook 101, respectively. Under the action of the central torsion spring 2011, when the safety stop bar 201 is not moved by external force, it is in a vertical position and located directly below the adapting locking block 202. The bottom of the adapting locking block 202 has a locking groove 2021. When the connecting seat 102 is lifted without external force, the locking groove 2021 separates from the top of the safety stop bar 201. Position 21 is located directly above safety stop 201. During use, when no hoisting or lifting operation is being performed, the locking mechanism 2 is in the unlocked state. At this time, safety stop 201 is in a vertical state under the action of the mid-position torsion spring 2011, and the locking groove 2021 is separated from the top of safety stop 201. Thus, when the safety stop 201 is subjected to external resistance and pressure, safety stop 201 can automatically rotate to avoid it. This allows the mill lifting ring to be placed and removed directly inside the lifting hook 101 without the need for manual operation of safety stop 201, simplifying the operation process, improving work efficiency, and making it convenient and flexible to use.

[0032] The connecting seat 102 is equipped with an unlocking spring 1022, with both ends of the unlocking spring 1022 fixedly connected to the bottom of the connecting seat 102 and the inside of the lifting hook 101, respectively. In use, after the lifting ring of the rolling mill component is placed inside the lifting hook 101, the rolling mill component can be lifted and transported using a bridge crane via the connecting wire rope 3. The sides of the adapting locking block 202 and the connecting seat 102 are equipped with synchronous racks 1021, and the teeth on both sides of the linkage gear 103 mesh with the teeth of the synchronous racks 1021 of the adapting locking block 202 and the connecting seat 102, respectively. When the rolling mill lifting ring is placed inside the lifting hook 101 for lifting, the connecting wire rope 3 drives the connecting seat 102 to move upwards. Due to the weight limitation of the rolling mill component, the connecting seat 102 is now independent of the lifting hook. 101 moves upward independently and stretches the unlocking spring 1022. During this process, under the action of the synchronous rack 1021 and the linkage gear 103, the adaptive locking block 202 will move downward. Since the safety stop bar 201 is in a vertical state when it is pressed or pushed by external force, the locking groove 2021 will be inserted into the top of the safety stop bar 201 when the adaptive locking block 202 moves downward, thus locking the safety stop bar 201 and preventing it from rotating. This can stably seal the installation and removal gap 1011 during the hoisting and lifting process, ensuring the stability and safety of the hoisting and lifting operation. Afterward, the seat of the connecting seat 102 will abut against the inner wall of the lifting hook 101 to form a rigid connection. Afterward, when the connecting wire rope 3 continues to drive the connecting seat 102 to move upward, the connecting seat 102 will also drive the lifting hook 101 and the rolling mill accessories at the bottom to be hoisted and lifted synchronously, which is stable and efficient.

[0033] The working principle of this embodiment is as follows: After the lifting ring of the rolling mill component is placed inside the lifting hook 101, the rolling mill component can be lifted and transported by a bridge crane via the connecting wire rope 3. When no lifting operation is being performed, the locking mechanism 2 is in the unlocked state. At this time, the safety stop 201 is in a vertical state under the action of the mid-position torsion spring 2011, and the locking groove 2021 is separated from the top of the safety stop 201. Therefore, when the external force encounters or squeezes the safety stop 201, the safety stop 201 can automatically rotate to avoid it. Thus, the rolling mill lifting ring can be directly placed and retrieved inside the lifting hook 101 without manual operation of the safety stop 201. When the rolling mill lifting ring is placed inside the lifting hook 101 for lifting, the connecting wire rope 3 drives the connecting seat 102 to move upward. Due to the weight limitation of the rolling mill component, the connecting wire rope 3 can move upward. The connecting seat 102 moves upward independently of the lifting hook 101 and stretches the unlocking spring 1022. During this process, under the action of the synchronous rack 1021 and the linkage gear 103, the adaptive locking block 202 moves downward. Since the safety stop bar 201 is in a vertical state when it is pressed or pushed by external force, the locking groove 2021 of the adaptive locking block 202 will be inserted into the top of the safety stop bar 201 when it moves downward, so that the safety stop bar 201 is locked and cannot rotate. This can stably seal the installation and removal gap 1011 during the lifting process, ensuring the stability and safety of the lifting operation. After that, the seat of the connecting seat 102 will abut against the inner wall of the lifting hook 101 to form a rigid connection. After that, when the connecting wire rope 3 continues to drive the connecting seat 102 to move upward, the connecting seat 102 will also drive the lifting hook 101 and the rolling mill accessories at the bottom to be lifted and transported synchronously.

Claims

1. A stable lifting device for rolling mill maintenance, characterized in that, include: The lifting assembly and connecting wire rope (3) are composed of a hook mechanism (1) and a locking mechanism (2); the hook mechanism (1) includes a lifting hook (101), a connecting seat (102) and a linkage gear (103). The top of the connecting seat (102) is connected to the bridge crane through the connecting wire rope (3), and the connecting seat (102) is inserted into the top of the lifting hook (101). The linkage gear (103) is rotatably connected to the inside of the lifting hook (101); the locking mechanism (2) includes a safety stop (201) and an adaptive locking block (202). The safety stop (201) is rotatably connected to the bottom of the lifting hook (101), and the safety stop (201) is inserted into the inside of the lifting hook (101).

2. The stable lifting device for rolling mill maintenance according to claim 1, characterized in that, The lifting hook (101) has a dismantling notch (1011) on its side, a safety stop bar (201) is located at the bottom of the dismantling notch (1011), and an adaptation lock block (202) is located at the top of the dismantling notch (1011).

3. The stable lifting device for rolling mill maintenance according to claim 2, characterized in that, The safety stop bar (201) has a center torsion spring (2011) on the outside of its rotating shaft. The two ends of the center torsion spring (2011) are fixedly connected to the inside of the safety stop bar (201) and the inside of the lifting hook (101), respectively. Under the action of the center torsion spring (2011), when the safety stop bar (201) is not moved by external force, the safety stop bar (201) is in a vertical state and the safety stop bar (201) is located directly below the adaptive locking block (202).

4. The stable lifting device for rolling mill maintenance according to claim 3, characterized in that, The adaptive lock block (202) and the connecting seat (102) are provided with synchronous racks (1021) on opposite sides, and the teeth on both sides of the linkage gear (103) mesh with the teeth of the synchronous racks (1021) of the adaptive lock block (202) and the connecting seat (102) respectively.

5. A stable lifting device for rolling mill maintenance according to claim 4, characterized in that, The connecting seat (102) is provided with an unlocking spring (1022) inside, and the two ends of the unlocking spring (1022) are respectively fixedly connected to the bottom of the connecting seat (102) and the inside of the lifting hook (101).

6. A stable lifting device for rolling mill maintenance according to claim 5, characterized in that, The bottom of the adaptive locking block (202) is provided with a locking groove (2021), and when the connecting seat (102) is not pulled up by external force, the locking groove (2021) and the top of the safety stop (201) are separated from each other, and the locking groove (2021) is located directly above the safety stop (201).

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