Anti-shaking steel box girder hoisting structure
By combining the use of a fixed frame and a hydraulic system, the swaying problem during the hoisting of the steel box girder was solved, achieving stability and angle adjustment during the hoisting process, and ensuring the safe hoisting and precise positioning of the steel box girder.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN HIGHWAY ENG GROUP
- Filing Date
- 2025-06-20
- Publication Date
- 2026-05-15
AI Technical Summary
Steel box girders are prone to swaying during hoisting. Existing devices are not effective at preventing swaying and lack angle adjustment functions, which affects hoisting safety and positioning accuracy.
The system employs components such as a fixed frame, hydraulic rods, bearing plates, pressure plates, and screws. Through hydraulic and threaded connections, it achieves vertical tension of the lifting ropes and limits the position of the steel box girder. The drive components are used to achieve fine-tuning of the angle, ensuring stability and positioning accuracy during the lifting process.
It effectively reduces the swaying of the steel box girder, improves the safety of the hoisting process, and allows for fine-tuning of the angle after hoisting to ensure accurate positioning of the steel box girder.
Smart Images
Figure CN224242532U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge construction technology, specifically to a steel box girder hoisting structure that prevents swaying. Background Technology
[0002] Steel box girders are a crucial and commonly used main beam type in modern long-span bridges, as well as urban overpasses and viaducts. Steel box girders are transferred and installed using hoisting methods. Before hoisting, lifting lugs are installed on the steel box girder, and the hooks of the hoisting equipment are connected to these lugs to lift the girder. During hoisting, strong winds or other factors can cause the steel box girder to sway, affecting hoisting safety and making positioning difficult.
[0003] Authorized publication number CN218931463U, "A Steel Box Girder Lifting Equipment," proposes a device that uses a fixed plate and a limiting frame to press down on the steel box girder body, aiming to keep the lifting ropes taut and prevent swaying during lifting. However, this device has the following problems in use: 1. Poor anti-sway effect: The limiting frame uses springs to abut against the steel box girder to tighten the lifting ropes, but when the steel box girder tends to sway, it exerts an upward force on the limiting frame, causing the springs to be further compressed. This design is difficult to effectively restrain the steel box girder, resulting in poor anti-sway effect; 2. Lack of angle adjustment function: After the steel box girder is lifted to the bridge pier, it often needs to be finely adjusted in angle to achieve precise positioning. This device lacks a corresponding angle adjustment mechanism, requiring manual adjustment, which reduces its practicality. Utility Model Content
[0004] This invention addresses the problems of steel box girders easily swaying during hoisting and the poor performance of existing devices; it provides a sway-proof steel box girder hoisting structure that can reduce the swaying of the steel box girder during hoisting and can also finely adjust the angle of the hoisted steel box girder to achieve accurate positioning.
[0005] To solve the above problems, the technical solution of this utility model is:
[0006] A sway-resistant steel box girder hoisting structure includes a fixed frame. The fixed frame has symmetrically arranged hoisting ropes at its bottom, each rope having an anti-detachment hook at its free end. A hydraulic rod is connected to the center of the bottom surface of the fixed frame. A bearing plate is connected to the piston end of the hydraulic rod, and a pressure plate is provided on the lower side of the bearing plate. Vertical poles are connected to the left and right sides of the top surface of the pressure plate. The upper end of each vertical pole movably passes through the bearing plate and is connected to a limit plate. Springs are fitted around the vertical poles between the bearing plate and the pressure plate, with both ends of the springs connected to the bearing plate and the pressure plate respectively. A screw rod with its upper end movably passing through the bearing plate is connected to the top surface of the pressure plate. Nuts are threaded onto the external threads of the screw rod between the bearing plate and the pressure plate. The fixed frame is equipped with a driving component for driving the fixed frame to rotate circumferentially.
[0007] Furthermore, the driving component includes a first cylinder and a second cylinder. The first cylinder is fixed in the middle of the top surface of the fixed frame. The inner wall of the first cylinder is provided with a spiral groove. The second cylinder is provided inside the first cylinder. The inner wall of the first cylinder slides in contact with the outer wall of the second cylinder. The outer top surface of the second cylinder is fixedly connected to the end of the hanging rod that movably penetrates the top plate of the first cylinder. The second cylinder is provided with an n-shaped hole on its peripheral wall. The second cylinder is provided with a movable plate that moves upward or downward. A driving rod is connected to the circumferential surface of the movable plate. The free end of the driving rod passes through the n-shaped hole and extends into the spiral groove.
[0008] Furthermore, a hydraulic rod is provided on the inner top surface of the second cylinder, with the piston end of the hydraulic rod facing downwards and connected to a movable plate.
[0009] Furthermore, the top surface of the fixing frame slides in contact with the lower end of the second cylinder, and the top surface of the second cylinder is equipped with a plurality of ball bearings that contact the inner top surface of the first cylinder.
[0010] Furthermore, there are two screws, which are symmetrical about the middle of the pressure plate. The bearing plate is provided with a through hole for the screws to move through. The outer diameter of the nut is larger than the diameter of the through hole.
[0011] Furthermore, each of the aforementioned lifting ropes is connected to a slider at the end away from the anti-detachment hook. Each slider is slidably located at the bottom of the fixed frame, and the two sliders move relative to each other or away from each other. The two sliders are located on the left and right sides of the hydraulic rod.
[0012] The beneficial effects of this utility model through the above technical solution are as follows:
[0013] After the steel box girder is hoisted by the lifting rope of this utility model, the bearing plate drives the pressure plate to press against the steel box girder, so that the lifting rope is in a vertical and taut state to hoist the steel box girder. The pressure plate is connected to the bearing plate by a spring. Under the action of the spring, the pressure plate keeps pressing against the steel box girder. The pressure plate is provided with a screw that passes through the bearing plate. After the pressure plate presses against the steel box girder and the lifting rope is in a vertical and taut state, the nut outside the screw presses against the bearing plate and limits the upward movement of the pressure plate. When the swaying tendency of the steel box girder gives the pressure plate an upward force, the swaying of the steel box girder is limited because the upward movement of the pressure plate is limited, thereby improving the anti-swaying effect.
[0014] This utility model can drive the fixed frame to rotate via a driving component, thereby realizing the rotation of the steel box girder connected to the fixed frame by a suspension rope. During the installation of the steel box girder, fine adjustments can be made to ensure accurate installation and positioning of the steel box girder. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 This is a sectional front view of the present invention;
[0017] Figure 3 This is a schematic diagram of the structure of the cylinder of this utility model;
[0018] Figure 4 This is a schematic diagram of the structure of the second cylinder of this utility model;
[0019] Figure 5 This is a schematic diagram of the lead screw connecting slider of this utility model.
[0020] The attached diagram is labeled as follows: 1. Fixing frame, 2. Lifting rope, 3. Anti-detachment hook, 4. Hydraulic rod one, 5. Bearing plate, 6. Pressure plate, 7. Upright pole, 9. Screw, 10. Limiting plate, 11. Spring, 12. Lifting rod, 13. Nut, 14. Cylinder one, 15. Cylinder two, 16. N-shaped hole, 17. Movable plate, 18. Drive rod, 19. Spiral groove, 20. Hydraulic rod two, 21. Ball bearing, 22. Slider, 23. Slide groove, 24. Motor, 25. Lead screw. Detailed Implementation
[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:
[0022] like Figures 1-5 As shown, a sway-resistant steel box girder hoisting structure includes a fixed frame 1. The fixed frame 1 has symmetrically arranged hoisting ropes 2 at its bottom, with each rope 2 having an anti-detachment hook 3 connected to its free end. A hydraulic rod 4 is connected to the center of the bottom surface of the fixed frame 1. A bearing plate 5 is connected to the piston end of the hydraulic rod 4 facing downwards. A pressure plate 6 is provided on the lower side of the bearing plate 5. Both the bearing plate 5 and the pressure plate 6 are rectangular plates. Vertical rods 7 are connected to the left and right sides of the top surface of the pressure plate 6. Each vertical rod 7 is a round rod, with its upper end movably penetrating the bearing plate 5 and connected to a limit plate 10. Springs 11 are fitted around the vertical rods 7 between the bearing plate 5 and the pressure plate 6, with both ends of the springs 11 connected to the bearing plate 5 and the pressure plate 6 respectively. A screw 9 with its upper end movably penetrating the bearing plate 5 is connected to the top surface of the pressure plate 6. Nuts 13 are threaded onto the external threads of the screw 9 between the bearing plate 5 and the pressure plate 6. The fixed frame 1 is equipped with a driving component for driving the fixed frame 1 to rotate circumferentially.
[0023] The driving component includes a first cylinder 14 and a second cylinder 15. The first cylinder 14 is fixed to the center of the top surface of the fixing frame 1. The inner wall of the first cylinder 14 is provided with a spiral groove 19, the lower end of which penetrates the lower end of the first cylinder 14. The second cylinder 15 is located inside the first cylinder 14. The inner wall of the first cylinder 14 slides in contact with the outer wall of the second cylinder 15. The outer top surface of the second cylinder 15 is fixedly connected to the end of the hanging rod 12 that movably penetrates the top plate of the first cylinder 14. The peripheral wall of the second cylinder 15 is provided with an n-shaped hole 16, which is opened along the height direction of the second cylinder 15. The second cylinder 15 is provided with a movable plate 17 that moves upward or downward. The movable plate 17 is a circular plate whose circumferential surface slides in contact with the inner wall of the second cylinder 15. A drive rod 18 is connected to the circumferential surface of the movable plate 17. The free end of the drive rod 18 passes through the n-shaped hole 16 and extends into the spiral groove 19. The drive rod 18 is a circular rod whose diameter corresponds to the width of the n-shaped hole 16. The free end of the drive rod 18 slides in contact with the spiral groove 19. The diameter of the drive rod 18 corresponds to the width of the spiral groove 19. The lower ends of both the first cylinder and the second cylinder are open.
[0024] The inner top surface of the cylinder 15 is provided with a hydraulic rod 20, and the piston end of the hydraulic rod 20 is connected to the movable plate 17 with its downward facing direction.
[0025] The top surface of the fixed frame 1 slides in contact with the lower end of the second cylinder 15, and the top surface of the second cylinder 15 is equipped with a plurality of ball bearings 21 that contact the inner top surface of the first cylinder 14.
[0026] There are two screws 9, which are symmetrical about the middle of the pressure plate 6. The bearing plate 5 is provided with a through hole for the screws 9 to move through. The outer diameter of the nut 13 is larger than the diameter of the through hole.
[0027] Each of the suspension ropes 2 is connected to a slider 22 at the end away from the anti-detachment hook 3. Each slider 22 is slidably located at the bottom of the fixed frame 1. The two sliders 22 move relative to each other or away from each other. The two sliders 22 are located on the left and right sides of the hydraulic rod 4. The two sliders 22 are symmetrical about the middle of the fixed frame 1.
[0028] The bottom surface of the fixed frame 1 is symmetrically provided with sliding grooves 23 on the left and right sides. The sliding grooves 23 are isosceles trapezoidal grooves with a lower opening width smaller than the upper opening width. The left end of the left sliding groove 23 passes through the left end face of the fixed frame 1. The left opening of the sliding groove 23 is blocked by a sealing plate. The slider 22 is an isosceles trapezoidal block that slides in contact with the sliding groove 23. The fixed frame 1 is provided with a lead screw 25. The left end of the lead screw 25 is rotatably connected to the left sealing plate. The right end of the lead screw 25 moves through the fixed frame 1 between the two sliding grooves 23. The right end of the lead screw is rotatably connected to the right sealing plate. The right side of the right sealing plate is connected to a motor 24. The output end of the motor 24 passes through the right sealing plate and connects to the right end of the lead screw 25. The threads of the left and right parts of the lead screw 25 are turned in opposite directions. The left and right parts of the lead screw 25 are respectively threaded to two sliders 22.
[0029] The upper end of the lifting rod 12 of this utility model is connected to the lifting equipment. In use, firstly, the distance between the two anti-detachment hooks 3 is adjusted according to the steel box girder to be lifted. That is, the motor 24 drives the lead screw 25 to rotate. When the lead screw 25 rotates, it drives the two sliders 22 to move relative to or away from each other. Each lifting rope 2 moves with the slider 22 it is connected to until the anti-detachment hooks 3 connected to the two lifting ropes 2 align with the lifting lugs on the steel box girder. The anti-detachment hooks then connect to the lifting lugs on the steel box girder. Subsequently, the nut 13 on each screw 9 is rotated downwards to contact the pressure plate 6. The lifting equipment drives the fixed frame 1 upwards via the lifting rod 12 until each lifting rope 2 is in a vertical state. Then, the upward movement of the fixed frame 1 stops, and the hydraulic rod 4 extends to drive the bearing plate 5 downwards. The pressure plate 6 moves downwards with the bearing plate 5. After the pressure plate 6 contacts the steel box girder, the hydraulic rod 4 continues to drive the bearing plate 5 downwards. The bearing plate 5 gradually approaches the pressure plate 6, and the spring 11 outside each upright 7 is compressed. Furthermore, due to the screw... The upper ends of rod 9 and upright 7 move through the bearing plate 5. During the downward movement of the bearing plate 5, the length of the screw 9 and upright 7 between the bearing plate 5 and the pressure plate 6 gradually shortens. After the spring 11 outside each upright 7 is in a semi-compressed state, the operation of hydraulic rod 4 stops, and the nut 13 outside each screw 9 is rotated upward until each nut 13 presses against the bearing plate 5. During the subsequent lifting of the steel box girder by the lifting equipment of this utility model, since the pressure plate 6 is in a downward pressing state against the steel box girder, under the action of the spring 11, the pressure plate 6 can maintain the downward pressing on the steel box girder, thereby keeping each lifting rope 2 in a vertical and taut state to lift the steel box girder, thereby reducing the swaying of the steel box girder during the lifting process. Even if the steel box girder has a tendency to sway, the upward force exerted by the steel box girder on the pressure plate 6 can be limited by the nut 13 outside each screw 9, preventing the pressure plate 6 from moving upward, thereby ensuring that the pressure plate 6 presses against the steel box girder and preventing the steel box girder from swaying.
[0030] After the steel box girder is hoisted into the installation position, when it is necessary to adjust the angle of the steel box girder, the hydraulic rod 20 drives the movable plate 17 to move up or down, and the drive rod 18 moves up or down with the movable plate 17. The free end of the drive rod 18 presses against the spiral groove 19 to drive the cylinder 14 to rotate clockwise or counterclockwise in the circumferential direction. The fixed frame 1 rotates clockwise or counterclockwise with the cylinder 14, thereby causing the fixed frame 1 to drive the steel box girder to make a clockwise or counterclockwise fine adjustment via the hoisting rope 2 until the steel box girder is adjusted to a suitable angle, and then the hydraulic rod 20 stops working, which can ensure the accurate positioning of the steel box girder.
[0031] The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Any equivalent or equivalent modifications or substitutions to the technical solutions of the present utility model without departing from the spirit of the present utility model or the scope of disclosure shall fall within the protection scope of the present utility model.
Claims
1. A sway-resistant steel box girder hoisting structure, comprising a fixed frame (1), wherein the fixed frame (1) is symmetrically provided with hoisting ropes (2) on the left and right sides at its bottom, and each hoisting rope (2) has an anti-detachment hook (3) connected to its free end; characterized in that, The bottom center of the fixed frame (1) is connected to a hydraulic rod (4), and the piston end of the hydraulic rod (4) is connected to a bearing plate (5) with the piston end facing downward. A pressure plate (6) is provided on the lower side of the bearing plate (5). The top left and right sides of the pressure plate (6) are connected to uprights (7). The upper end of each upright (7) moves through the bearing plate (5) and is connected to a limit plate (10). A spring (11) is sleeved on the uprights (7) between the bearing plate (5) and the pressure plate (6). The two ends of the spring (11) are connected to the bearing plate (5) and the pressure plate (6) respectively. The top surface of the pressure plate (6) is connected to a screw (9) with the upper end moving through the bearing plate (5). A nut (13) is threaded on the screw (9) between the bearing plate (5) and the pressure plate (6). The fixed frame (1) is provided with a driving component for driving the fixed frame (1) to rotate circumferentially.
2. The anti-sway steel box girder hoisting structure according to claim 1, characterized in that, The driving component includes a first cylinder (14) and a second cylinder (15). The first cylinder (14) is fixed in the middle of the top surface of the fixed frame (1). The inner wall of the first cylinder (14) is provided with a spiral groove (19). The second cylinder (15) is provided inside the first cylinder (14). The inner wall of the first cylinder (14) slides in contact with the outer wall of the second cylinder (15). The outer top surface of the second cylinder (15) is fixedly connected to the end of the hanging rod (12) that movably penetrates the top plate of the first cylinder (14). The second cylinder (15) is provided with an n-shaped hole (16) on its peripheral wall. The second cylinder (15) is provided with a movable plate (17) that moves upward or downward. A driving rod (18) is connected to the circumferential surface of the movable plate (17). The free end of the driving rod (18) passes through the n-shaped hole (16) and extends into the spiral groove (19).
3. The anti-sway steel box girder hoisting structure according to claim 2, characterized in that, The inner top surface of the cylinder 2 (15) is provided with a hydraulic rod 2 (20), and the piston end of the hydraulic rod 2 (20) is connected to the movable plate (17) with the piston facing downward.
4. The anti-sway steel box girder hoisting structure according to claim 3, characterized in that, The top surface of the fixed frame (1) slides in contact with the lower end of the second cylinder (15), and the top surface of the second cylinder (15) is equipped with a plurality of balls (21) that contact the inner top surface of the first cylinder (14).
5. The anti-sway steel box girder hoisting structure according to claim 1, characterized in that, There are two screws (9), which are symmetrical about the middle of the pressure plate (6). The bearing plate (5) is provided with a through hole for the screws (9) to move through. The outer diameter of the nut (13) is larger than the diameter of the through hole.
6. The anti-sway steel box girder hoisting structure according to claim 1, characterized in that, Each of the suspension ropes (2) is connected to a slider (22) at the end away from the anti-detachment hook (3). Each slider (22) slides left and right at the bottom of the fixed frame (1). The two sliders (22) move relative to each other or away from each other. The two sliders (22) are located on the left and right sides of the hydraulic rod (4).