Special clamp for large angle steel
By designing large angle steel special clamps, safety hazards and consumables problems during lifting are solved, efficient and safe lifting operations are achieved, and labor intensity and wire rope consumption are reduced.
Patent Information
- Application Number
- CN202422619401.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-10-29
AI Technical Summary
The existing technology of large-scale angle steel lifting has many safety hazards, low work efficiency and poor economy, which are mainly reflected in poor lifting stability, high labor intensity and large consumable consumption.
A special clamp for large angle steel is designed, including a power arm, a crane, a hook, a pin and a support plate, forming a jaw that cooperates with the large angle steel to replace the traditional wire rope lifting method.
The safety factor of large-scale angle steel hoisting operations has been improved, labor intensity and lifting consumables have been reduced, wire rope costs have been saved, and work efficiency has been improved.
Smart Images
Figure CN223225649U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a special clamp for large angle steel, belonging to the technical field of large angle steel lifting equipment in the metallurgical industry. Background Art
[0002] Currently, large angle steels are hoisted into warehouses and loaded onto trucks using wire rope hoisting. Two 18.5mm diameter x 6m wire ropes are looped around the angle steel and then attached to the main hook of a crane. According to the principles of gravity, structural mechanics, and lifting techniques, this hoisting method fails to meet the scientific requirement of a maximum vertical angle of 30°. Consequently, this hoisting technique presents the following drawbacks: ① Many safety hazards: When the crane operator hoists the angle steel with wire ropes, the maximum contact distance between the two wire ropes and the angle steel is approximately 1.5 meters when the ropes are pulled apart. However, angle steel lengths range from 6 to 12 meters, resulting in poor stability and a violation of the 3-4-3 looping ratio requirement. After a trial lift, if the center of gravity deviates, the crane must be remounted, potentially causing personal injury or cargo damage. Furthermore, when separating angle steel from different stacks on the crane, the ends of the wire ropes can easily become dislodged. ② Low work efficiency: Wire ropes must be threaded, adjusted for angles, and adjusted for the center of gravity of angle steel. If the wire ropes become entangled, these adjustments must be made. Furthermore, during the lifting process, the ropes are tightened, and the lifting rate is slow to prevent scratches on the riggers. ③ Economic efficiency: Wire ropes are prone to breakage during the draw process, and become scrapped if the number of broken wires reaches 7-8 per pitch. Based on a monthly loading capacity of 50,000 tons, approximately 1,800 meters (300 wire ropes x 6 meters each) are required, resulting in a total monthly wire rope consumption of 50,000-60,000 yuan. Utility Model Content
[0003] The purpose of the utility model is to provide a special clamp for large angle steel, which improves the safety factor of large angle steel hoisting operation, reduces labor intensity and hoisting consumables, and solves the problems existing in the background technology.
[0004] The technical solution of the utility model is:
[0005] A special clamp for large angle steel, comprising a power arm, a lifting arm, a hook, a pin shaft 1, a pin shaft 2, a pin shaft 3, a clamping plate and a support plate. One end of the power arm is connected to the hook through the pin shaft 1, and the other end of the power arm is connected to the clamping plate through the pin shaft 3. The lifting arm is L-shaped, and the middle of the power arm is connected to one side of the lifting arm through the pin shaft 2. A support plate is provided on the other side of the lifting arm, and a jaw that matches the large angle steel is formed between the clamping plate and the support plate.
[0006] The pressing plate and the supporting plate are both angular in shape to match the large angle steel.
[0007] The openings of the pressing plate and the supporting plate are downward.
[0008] The support plate is welded to the boom.
[0009] The beneficial effects of the utility model are: it can facilitate the lifting of large angle steels, improve the safety factor of large angle steel lifting operations, and reduce labor intensity and lifting consumables. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 This is the main view of the utility model;
[0011] Figure 2 This is a side view of the utility model;
[0012] In the figure: power arm 1, lifting arm 2, hook 3, pin 1 4, pin 2 5, pin 3 6, pressing plate 7, support plate 8, large angle steel 9. DETAILED DESCRIPTION
[0013] The present invention will be further described below with reference to the accompanying drawings and examples.
[0014] Refer to the attached Figure 1-2 A special clamp for large angle steel, comprising a power arm 1, a boom 2, a hook 3, a pin 1 4, a pin 2 5, a pin 3 6, a clamping plate 7 and a support plate 8. One end of the power arm 1 is connected to the hook 3 through the pin 1 4, and the other end of the power arm 1 is connected to the clamping plate 7 through the pin 3 6. The boom 2 is L-shaped, and the middle of the power arm 1 is connected to one side of the boom 2 through the pin 2 5. A support plate 8 is provided on the other side of the boom 2. A jaw that matches the large angle steel 9 is formed between the clamping plate 7 and the support plate 8.
[0015] In this embodiment, refer to the attached Figure 1-2 The clamping plate 5 and the support plate 6 are both angular in shape and match the large angle steel 9. The clamping plate 5 is rotatably connected to the power arm 1 through the pin shaft 3 6, and the support plate 6 is welded to the boom 2. The openings of the clamping plate 5 and the support plate 6 are downward, and a jaw that matches the large angle steel 9 is formed between the clamping plate 5 and the support plate 6.
[0016] When lifting large angle steel, the clamps are used in pairs, one clamp at each end of a bundle of large angle steel. Compared with the traditional method of lifting large angle steel using wire rope, the utility model can facilitate the lifting of large angle steel, improve the safety factor of large angle steel lifting operations, reduce labor intensity and lifting consumables. According to statistics, it can save at least 600,000 yuan in wire rope costs annually.
Claims
1. A special clamp for large angle steel, characterized by: The utility model comprises a power arm (1), a lifting arm (2), a hook (3), a pin shaft 1 (4), a pin shaft 2 (5), a pin shaft 3 (6), a pressing plate (7) and a support plate (8), wherein one end of the power arm (1) is connected to the lifting hook (3) through the pin shaft 1 (4), and the other end of the power arm (1) is connected to the pressing plate (7) through the pin shaft 3 (6). The lifting arm (2) is L-shaped, and the middle of the power arm (1) is connected to one side of the lifting arm (2) through the pin shaft 2 (5). A support plate (8) is provided on the other side of the lifting arm (2), and a jaw matched with a large angle steel (9) is formed between the pressing plate (7) and the support plate (8).
2. A clamp specifically designed for large angle steel according to claim 1, characterized in that: The pressing plate (7) and the supporting plate (8) are both angular in shape and match the large angle steel (9).
3. The large angle steel special clamp according to claim 2, characterized in that: The openings of the pressing plate (7) and the supporting plate (8) face downward.
4. The large angle steel special clamp according to claim 3, characterized in that: The support plate (8) is welded to the boom (2).