Device for preventing rotation of crane hook head in non-ferrous smelting
Patent Information
- Application Number
- CN202522432329.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-17
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-11-17
AI Technical Summary
[0004]针对现有技术的不足，本实用新型提供了一种防有色冶炼行车钩头旋转的装置，解决了冶金行车吊运渣包时，渣包碰撞或位移导致钩头随渣包晃动旋转，需人工干预渣包角度以实现整齐摆放，进而增加工人劳动量与安全风险，且现有限位方式影响钩头非吊运状态下自由使用、维护成本高的技术问题
防旋转效果稳定，提升作业精准度：本装置通过固定卡板与固定卡片夹紧固定在钩头滑轮下部钢板，固定卡箍组件固定在钩头长柄，再利用连接销将两者锁合，可有效限制钩头长柄相对滑轮的旋转自由度，避免吊运渣包时钩头随渣包晃动旋转，使渣包能保持稳定角度，无需人工干预即可精准摆放到指定位置，大幅提升了渣包摆放的精准度与作业效率。
Smart Images
Figure CN224917374U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of auxiliary equipment for overhead cranes transporting slag bags in the metallurgical industry, and in particular to a device for preventing the rotation of the hook head of an overhead crane in non-ferrous metallurgy. Background Technology
[0002] In the metallurgical industry, overhead cranes use gantry hooks to lift slag bags for slag transfer. However, during actual lifting, the slag bag inevitably collides with surrounding equipment or shifts due to inertia during hoisting and movement. After the slag bag is lifted off the ground, the hook rotates synchronously with the bag's sway. This rotation causes the slag bag to lose its preset angle. To neatly place the slag bag in the designated position, the crane operator must manually intervene (e.g., fine-tuning the crane or using auxiliary tools) to stop the bag at the appropriate angle. This process not only increases the operator's workload and prolongs the operation time but also poses safety risks such as hook detachment, bag tilting, and leakage due to operational errors during manual intervention or unexpected bag swaying, threatening the personal safety of on-site personnel and production equipment.
[0003] Currently, there is no dedicated protective device for the rotation problem of the hook head of non-ferrous metallurgical cranes. Some companies use the method of welding a limit block at the hook head to restrict rotation. However, this method will prevent the hook head from rotating freely when not in a lifting state, affecting the normal use of the hook head in other operation scenarios (such as hook adjustment and equipment relocation). Moreover, after long-term use, the limit block is prone to failure due to wear and collision deformation, requiring frequent maintenance and replacement, which increases equipment maintenance costs and makes it difficult to meet the continuous, efficient and safe operation requirements of metallurgical production. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a device to prevent the hook head of a non-ferrous metallurgical smelting crane from rotating. This solves the problem that when a metallurgical crane lifts a slag bag, the hook head rotates and sways with the bag due to collision or displacement. This requires manual intervention to adjust the angle of the slag bag to ensure neat placement, which increases the workload and safety risks for workers. Furthermore, the existing limiting method restricts the free use of the hook head in non-lifting states and results in high maintenance costs.
[0005] To achieve the above objectives, this utility model provides the following technical solution: A device for preventing the hook of a non-ferrous metal smelting crane from rotating includes a fixing plate, a fixing card, a fixing clamp assembly, and a connecting pin. The fixing plate and the fixing card are detachably connected by connecting bolts. They are clamped together and fixed on the steel plate under the pulley of the crane hook head. The fixing plate is provided with a first positioning hole for inserting the connecting pin. The fixing clamp assembly consists of a fixing clamp plate and a fixing clamp, both of which are semi-circular arc structures. They are spliced into a ring by connecting bolts and fitted and fixed on the long handle of the crane hook head. The flat end of the fixing clamp plate or the fixing clamp is provided with a second positioning hole that is coaxially adapted to the first positioning hole. The connecting pin consists of a gripping part, a retaining ring, and a conical tip from top to bottom. The conical tip is used to insert into the first positioning hole and the second positioning hole to lock the fixing plate and the fixing clamp assembly into one piece. The retaining ring is used to limit the insertion depth of the connecting pin and prevent it from falling out.
[0006] Preferably, the fixing plate has four rectangular bolt holes, and the fixing card has matching bolt holes that correspond one-to-one with the four bolt holes. The connecting bolts pass through the bolt holes and the matching bolt holes to achieve the clamping and fixing of the lower steel plate of the hook pulley by the fixing plate and the fixing card.
[0007] Preferably, both ends of the fixing clamp plate and both ends of the fixing clamp are provided with concentric through holes. The connecting bolts pass through the concentric through holes and are locked with nuts, so that the fixing clamp plate and the fixing clamp form a ring structure with a diameter that matches the long handle of the hook.
[0008] Preferably, the gripping part of the connecting pin is a cylindrical structure, and the length of the gripping part is 5-8cm, which makes it convenient for the crane operator to grip and place the connecting pin with one hand.
[0009] Preferably, the fixing plate and fixing card are made of Q345 steel plate with a thickness of 8-12mm, which is used to ensure the structural strength of the fixing plate and fixing card when hoisting slag bags.
[0010] Preferably, the first positioning hole and the second positioning hole have the same diameter, and the diameter is 0.5-1mm larger than the maximum diameter of the connecting pin's conical tip, ensuring that the conical tip can be smoothly inserted into the positioning hole.
[0011] Preferably, the retaining ring of the connecting pin is circular, and the diameter of the retaining ring is 3-5mm larger than the diameter of the first positioning hole. When the connecting pin is inserted into the positioning hole, the retaining ring can completely cover the first positioning hole and abut against the upper surface of the fixing plate.
[0012] Preferably, the inner arc surface of the fixing clamp plate and the fixing clamp is provided with an anti-slip rubber pad, which is fixed by adhesive to increase the friction between the fixing clamp assembly and the hook shank and prevent the fixing clamp assembly from sliding along the shank.
[0013] Compared with the prior art, the present invention has the following beneficial effects: Stable anti-rotation effect, improving operational accuracy: This device is fixed to the lower steel plate of the hook pulley by a fixing plate and a fixing card, and the fixing clamp assembly is fixed to the long handle of the hook. The two are then locked together by a connecting pin. This effectively restricts the rotational freedom of the long handle of the hook relative to the pulley, preventing the hook from swaying and rotating with the slag bag when lifting it. This allows the slag bag to maintain a stable angle and can be accurately placed in the designated position without manual intervention, greatly improving the accuracy of slag bag placement and operational efficiency.
[0014] Flexible operation without affecting normal use of the hook: When not lifting slag bags, simply pull out the connecting pin to restore the fixed plate and fixed clamp assembly to their separated state. The long handle of the hook can rotate freely without affecting the crane to perform other non-lifting operations such as hook relocation and hook adjustment. This solves the problem of the traditional limit method restricting the use of the hook and adapts to the diversified operation needs of metallurgical production.
[0015] The structure is simple and reliable, reducing labor intensity and safety risks: The device consists of a fixed plate, a fixed card, a fixed clamp assembly and a connecting pin. It has few parts and a simple structure, making assembly and operation convenient. A single crane operator can complete the insertion and removal of the connecting pin. At the same time, since there is no need for manual intervention to correct the angle of the slag bag, the labor intensity of the crane operator is greatly reduced, and the safety hazards such as collisions and disengagement that may occur during manual intervention are avoided, ensuring on-site operation safety.
[0016] High durability and low maintenance cost: The fixing plate, fixing card, fixing clamp plate and fixing clamp are all made of high-strength materials, which can withstand the impact and wear of external force when hoisting slag bags. The tapered tip design of the connecting pin is easy to insert and remove smoothly and is not easily deformed. The overall failure rate of the device is low. In addition, damaged parts can be replaced individually without the need for the whole device to be scrapped, which effectively reduces the equipment maintenance cost and replacement cycle. Attached Figure Description
[0017] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.
[0018] Figure 1 This is a structural diagram of the fixing plate and fixing card in this utility model; Figure 2 This is a structural diagram of the fixing clamp plate and fixing clamp in this utility model; Figure 3 This is a structural diagram of the connecting pin in this utility model.
[0019] Illustration: 1. Fixing plate; 2. Fixing card; 3. Fixing clamp plate; 4. Fixing clamp; 5. Connecting pin. Detailed Implementation
[0020] This application provides a device to prevent the hook of a non-ferrous metallurgical crane from rotating. This effectively solves the problem that when a metallurgical crane lifts a slag bag, the hook rotates with the bag due to collision or displacement. This requires manual intervention to adjust the angle of the slag bag to ensure neat placement, which increases the workload and safety risks for workers. Furthermore, the current limiting method affects the free use of the hook in non-lifting states and has high maintenance costs. Example
[0021] like Figure 1 , Figure 2 , Figure 3 As shown, the overall technical solution in this application embodiment is as follows: To address the problems existing in the prior art, this utility model provides a device for preventing the hook head of a non-ferrous metal smelting crane from rotating. The overall composition and assembly process of the device are as follows: The core components of this utility model include a fixing plate 1, a fixing card 2, a fixing clamp plate 3, a fixing clamp 4, and a connecting pin 5. The assembly of each component must be carried out step by step in strict accordance with its compatibility with the crane coupler. The specific process is as follows: First, select a fixing plate 1 and a fixing clip 2 that are compatible with the thickness of the lower steel plate of the hook pulley. Both are made of Q345 steel plate with a thickness of 10mm to ensure structural strength when lifting slag bags. The fixing plate 1 has four pre-drilled rectangular bolt holes, and the fixing clip 2 has four corresponding bolt holes. During assembly, the fixing plate 1 is attached to one side of the lower steel plate of the hook pulley, and the fixing clip 2 is attached to the other side of the steel plate, so that the bolt holes of both are completely aligned. Then, use M12 high-strength connecting bolts to pass through the bolt holes of the fixing plate 1, the hook steel plate, and the fixing clip 2 in sequence, and tighten them with anti-loosening nuts to ensure that the fixing plate 1 and the fixing clip 2 clamp the hook steel plate tightly without loosening or displacement. At the same time, it is necessary to ensure that the first positioning hole on the fixing plate 1 for inserting the connecting pin 5 faces the opposite side of the hook opening, and the center of the hole is perpendicular to the plane of the hook connecting plate.
[0022] Assembly of Fixing Clamp Plate 3 and Fixing Clamp 4: Both Fixing Clamp Plate 3 and Fixing Clamp 4 are semi-circular arc structures. The inner arc diameter is adapted to the outer diameter of the hook head shank (e.g., if the hook head shank diameter is 80mm, the inner arc diameter is set to 80.5mm, leaving a slight assembly gap). Both inner arc surfaces are glued with 3mm thick anti-slip rubber pads to increase friction with the hook head shank and prevent slippage during use. During assembly, Fixing Clamp Plate 3 and Fixing Clamp 4 are respectively fitted onto both sides of the hook head shank, aligning their ends. At this point, the pre-set concentric through holes (14mm diameter) at both ends of Fixing Clamp Plate 3 and Fixing Clamp 4 completely overlap. M10 connecting bolts are selected and passed through the concentric through holes, and locked with double nuts to form a complete ring structure between the fixing clamp plate 3 and the fixing clamp 4, which is tightly fixed to the hook shank. At the same time, the assembly position needs to be adjusted to ensure that the second positioning hole on the flat end of the fixing clamp 4 is coaxial with the first positioning hole on the fixing plate 1, and the line connecting the centers of the two holes is parallel to the axis of the hook shank, so as to prepare for the subsequent insertion of the connecting pin 5.
[0023] Fitting inspection of connecting pin 5: Connecting pin 5 consists of three parts from top to bottom: a gripping part, a retaining ring, and a conical tip. The gripping part is cylindrical, 6cm in length, and 20mm in diameter, facilitating one-handed gripping and placement by the crane operator. The retaining ring is circular, with a diameter 4mm larger than the diameter of the first positioning hole (e.g., if the first positioning hole diameter is 16mm, the retaining ring diameter is 20mm), used to limit the insertion depth of connecting pin 5 and prevent it from falling out. The taper of the conical tip is set to 1:10, and its maximum diameter is 0.8mm smaller than the diameter of the first positioning hole, ensuring smooth insertion into the positioning hole without significant wobbling. Before assembly, check whether the conical tip of connecting pin 5 is smooth and free of burrs, and whether the connection between the retaining ring, gripping part, and conical tip is secure, to avoid breakage or detachment during use.
[0024] Operating procedures for the device: To prevent rotation during slag bag hoisting, when the crane is ready to hoist the slag bag, the crane operator must first confirm that the first positioning hole of the fixed clamp 1 and the second positioning hole of the fixed clamp 4 are coaxially aligned (this can be done by visual inspection or by using a thin wire to check if the holes are connected). After confirming that everything is correct, the operator should grasp the gripping part of the connecting pin 5 with one hand, align the conical tip with the first positioning hole of the fixed clamp 1, and slowly insert it downwards until the retaining ring of the connecting pin 5 is fully abutting against the upper surface of the fixed clamp 1. At this point, the conical tip passes through the second positioning hole, locking the fixed clamp 1 and the fixed clamp 4 together. Since the fixed clamp 1 is fixed to the hook pulley steel plate and the fixed clamp 4 is fixed to the hook handle, the connection of the two via the connecting pin 5 restricts the rotational freedom of the hook handle relative to the pulley, thereby preventing the hook from rotating with the slag bag during hoisting and ensuring that the slag bag maintains a stable angle for accurate placement.
[0025] For dismantling operations not involving hoisting: After the slag bag is hoisted to the designated location and unloading is completed, the crane operator must first lower the hook to a safe height (1.5-2m above the ground), then grasp the gripping part of the connecting pin 5 with one hand and pull it upwards, placing it on the pre-set storage hook next to the hook (to prevent loss). At this time, the fixing plate 1 and the fixing clamp 4 are separated, and the long handle of the hook can rotate freely without affecting other non-hoisting operations (such as hook relocation, hook adjustment, etc.), thus avoiding any restriction on the normal use of the hook by the device.
[0026] Routine inspection and maintenance should be carried out weekly, including checking all components of the device: checking whether the connecting bolts of the fixing plate 1 and the fixing clip 2 are loose, and tightening them in time if they are loose; checking whether the anti-slip rubber pads inside the fixing clamp plate 3 and the fixing clamp 4 are worn, and replacing them with new pads if they are severely worn; confirming whether the conical tip of the connecting pin 5 is deformed and whether the retaining ring is loose, and repairing or replacing it in time if there are any problems to ensure that the device is in normal working condition.
[0027] When inserting or removing the connecting pin 5, the crane operator must ensure that the body maintains a safe distance (not less than 0.5m) from the hook and slag bag to avoid collision injury caused by sloshing of the slag bag or displacement of the hook. This device is prohibited from being used when hoisting overweight slag bags (exceeding the design load capacity of the device; for example, if the design load capacity is 50t, it is not allowed to hoist slag bags exceeding 50t) to prevent damage to the components due to overload. If the device malfunctions (such as the connecting pin 5 being unable to be inserted, the fixing plate 1 being loose, etc.), use must be stopped and maintenance personnel must be contacted for handling. Forced operation is prohibited.
[0028] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. A device for preventing the hook of a non-ferrous metal smelting crane from rotating, characterized in that, Includes a fixing plate (1), a fixing card (2), a fixing clamp assembly, and a connecting pin (5); The fixed plate (1) and the fixed card (2) are detachably connected by connecting bolts. They are clamped together and fixed on the steel plate at the lower part of the pulley of the crane hook. The fixed plate (1) has a first positioning hole for inserting the connecting pin (5). The fixed clamp assembly consists of a fixed clamp plate (3) and a fixed clamp (4), both of which are semi-circular arc structures. They are spliced into a ring by connecting bolts and fitted and fixed on the long handle of the crane hook head. The flat end of the fixed clamp plate (3) or the fixed clamp (4) is provided with a second positioning hole that is coaxial with and adapted to the first positioning hole. The connecting pin (5) consists of a gripping part, a retaining ring, and a conical tip from top to bottom.
2. The device for preventing the hook head of a non-ferrous metal smelting crane from rotating according to claim 1, characterized in that, The fixing plate (1) has four rectangular bolt holes, and the fixing card (2) has matching bolt holes that correspond one-to-one with the four bolt holes. The connecting bolt passes through the bolt holes and the matching bolt holes.
3. The device for preventing the hook head of a non-ferrous metal smelting crane from rotating according to claim 1, characterized in that, Both ends of the fixed clamp plate (3) and both ends of the fixed clamp (4) are provided with concentric through holes. The connecting bolts pass through the concentric through holes and are locked with nuts, so that the fixed clamp plate (3) and the fixed clamp (4) form a ring structure with a diameter that matches the long handle of the hook.
4. The device for preventing the hook head of a non-ferrous metal smelting crane from rotating according to claim 1, characterized in that, The gripping part of the connecting pin (5) is cylindrical, and the length of the gripping part is 5-8cm.
5. The device for preventing the hook head of a non-ferrous metal smelting crane from rotating according to claim 1, characterized in that, The first positioning hole and the second positioning hole have the same diameter, and the diameter is 0.5-1mm larger than the maximum diameter of the tapered tip of the connecting pin (5).
6. The device for preventing the hook head of a non-ferrous metal smelting crane from rotating according to claim 1, characterized in that, The retaining ring of the connecting pin (5) is circular, and the diameter of the retaining ring is 3-5 mm larger than the diameter of the first positioning hole. When the connecting pin (5) is inserted into the positioning hole, the retaining ring completely covers the first positioning hole and abuts against the upper surface of the fixing plate (1).
7. The device for preventing the hook head of a non-ferrous metal smelting crane from rotating according to claim 1, characterized in that, The inner arc surfaces of the fixing clamp plate (3) and the fixing clamp (4) are provided with anti-slip rubber pads, which are fixed by adhesive.