Cable-stayed bridge steel box girder cantilever hoisting matching device
By introducing an electric guide rail, hydraulic rod, and motor-driven bidirectional threaded rod system into the cantilever hoisting device for steel box girders of cable-stayed bridges, and combining it with springs and baffles to form an automatic locking structure, the problem of hook slippage was solved, and the hoisting safety and adaptability were improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA COMMUNICATIONS COMMUNICATIONS SECOND AVIATION ADMINISTRATION JILIN CONSTRUCTION CO LTD
- Filing Date
- 2025-08-04
- Publication Date
- 2026-05-26
Smart Images
Figure CN224279566U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge construction technology, and in particular to a matching device for cantilever hoisting of steel box girders for cable-stayed bridges. Background Technology
[0002] In the cantilever erection of steel box girders for cable-stayed bridges, such as those spanning rivers and seas, steel box girder segments need to be spliced together segment by segment through multiple sets of lifting points. Such scenarios place certain requirements on the safety and reliability of the lifting connections. If the connection between the hook and the lifting lug of the steel box girder fails, it will directly lead to major accidents such as equipment damage, personal injury, and project delays. Therefore, hook anti-detachment protection is the core safety barrier for cantilever erection.
[0003] However, some existing cantilever hoisting matching devices for cable-stayed bridge steel box girders typically use ordinary hook gravity self-locking, relying on the hook tilt angle to clamp the lifting lug. After the hook is engaged, there is a lack of automatic locking structure, requiring manual inspection of the locking status. However, the insufficient anti-disengagement protection capability of the existing connection method is not considered, and the problem of hook slippage caused by hoisting sway is easily caused.
[0004] Therefore, a matching device for cantilever hoisting of steel box girders for cable-stayed bridges is proposed to address the above problems. Utility Model Content
[0005] To overcome the above deficiencies, this utility model provides a cantilever hoisting matching device for steel box girders of cable-stayed bridges, which aims to improve the problem of insufficient anti-disengagement capability in the existing technology.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A cantilever hoisting matching device for a cable-stayed bridge steel box girder includes a base plate and a fixed plate. Support frames are fixedly connected to the top left and right sides of the base plate. Electric guide rails are installed on the top front and rear sides of the two support frames. A movable frame is installed on the top of the two electric guide rails. Two guide rods are installed on the front and rear sides inside the movable frame. Hydraulic rods are fixedly connected to the bottom left and right sides of the movable frame. A lifting plate is fixedly connected to the output ends of multiple hydraulic rods. An installation plate is fixedly connected to the right side of the lifting plate. An adjustment component for adjusting the hook spacing according to the size of the steel box girder is fixedly connected to the top of the installation plate. A hook one is installed at the bottom of the adjustment component. A connecting component for connecting parts is installed at the bottom of the hook one. A hook two is fixedly connected to the bottom of the connecting component. Fixed shafts are fixedly connected to the bottom front and rear sides of the fixed plate. Baffles are rotatably connected to the outside of the two fixed shafts. Springs are installed on the side of the baffles and the hook two that are close to each other.
[0008] As a further description of the above technical solution:
[0009] The adjustment assembly includes a motor and a bidirectional threaded rod. The bottom of the motor is fixedly connected to the top of the mounting plate, and the right side of the bidirectional threaded rod is fixedly connected to the output end of the motor. Movable plates are threadedly connected to both the left and right sides of the motor. A fixed rod is fixedly connected to the front side of the inside of the lifting plate, and the top of the first hook is fixedly connected to the bottom of the movable plate.
[0010] As a further description of the above technical solution:
[0011] The connecting assembly includes a loop and a connecting plate. The top of the loop is fitted onto the bottom of the hook, and the bottom of the loop is fitted onto the outside of the connecting plate. The top of the fixing plate is fixedly connected to the bottom of the connecting plate.
[0012] As a further description of the above technical solution:
[0013] One end of the spring is fixedly connected to the outside of the baffle, and the other end of the spring is fixedly connected to the hook two;
[0014] As a further description of the above technical solution:
[0015] The outside of the baffle is in contact with the outside of the second hook, and the inside of the lifting plate is slidably connected to the outside of the guide rod;
[0016] As a further description of the above technical solution:
[0017] The front side of the movable plate is slidably connected to the outside of the fixed rod, and the outside of the movable plate is slidably connected to the inside of the lifting plate.
[0018] This utility model has the following beneficial effects:
[0019] 1. In this utility model, the fixed plate at the bottom of the fixed shaft is linked to the rotation of the baffle, and the elastic restoring force of the spring pushes the baffle to reset, so that the baffle and the second hook are in close contact to form a mechanical lock, which realizes the anti-detachment protection of the hook connection during the hoisting process and prevents the hook from falling off and causing safety accidents.
[0020] 2. In this utility model, the motor drives the bidirectional threaded rod to rotate, and the linkage moving plate slides linearly in the opposite direction along the fixed rod, thereby driving the hook to adjust the spacing synchronously. This achieves precise adaptation of the lifting point spacing of steel box girders of cable-stayed bridges with different spans, solving the pain points of fixed spacing and poor adaptability of traditional lifting devices. Attached Figure Description
[0021] Figure 1 This is a three-dimensional schematic diagram of a cantilever hoisting and matching device for a steel box girder of a cable-stayed bridge proposed in this utility model;
[0022] Figure 2 This is a schematic diagram of the bidirectional threaded rod of a matching device for cantilever hoisting of steel box girder of cable-stayed bridge proposed in this utility model;
[0023] Figure 3 This is a schematic diagram of the structure of the hook 2 of the cantilever hoisting matching device for a cable-stayed bridge steel box girder proposed in this utility model;
[0024] Figure 4 for Figure 3 Enlarged view of point A.
[0025] Legend:
[0026] 1. Base plate; 2. Support frame; 3. Electric guide rail; 4. Moving frame; 5. Guide rod; 6. Hydraulic rod; 7. Lifting plate; 8. Mounting plate; 9. Motor; 10. Double threaded rod; 11. Fixed rod; 12. Moving plate; 13. Hook one; 14. Rope loop; 15. Connecting plate; 16. Fixed plate; 17. Hook two; 18. Fixed shaft; 19. Baffle; 20. Spring. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] Reference Figure 1 , Figure 3 and Figure 4This utility model provides an embodiment of a cantilever hoisting matching device for a cable-stayed bridge steel box girder. It includes a base plate 1 as the bearing foundation of the device, providing stable support for the overall structure and bearing the vertical load and horizontal impact force during steel box girder hoisting. Support frames 2 are fixedly connected to the top left and right sides of the base plate 1, supporting electric guide rails 3 and a movable frame 4, increasing the overall height of the device to meet the hoisting height requirements of the steel box girder. Electric guide rails 3 are provided on the top front and rear sides of the two support frames 2, providing horizontal sliding tracks for the movable frame 4, enabling precise alignment of the device in the steel box girder hoisting area. The top of the two electric guide rails 3 is equipped with a movable frame 4 bearing guide rods 5, hydraulic rods 6, and other components. The lateral position of the hoisting is adjusted by sliding along the electric guide rails 3. Two guide rods 5 are provided on the front and rear sides of the interior of the movable frame 4 to constrain the sliding trajectory of the lifting plate 7, ensuring a smooth lifting process. Stable and undisturbed, improving vertical displacement accuracy, the bottom left and right sides of the mobile frame 4 are fixedly connected to hydraulic rods 6 to provide lifting power. The output ends extend and retract, driving the lifting plate 7 to move vertically and controlling the hoisting height. The output ends of multiple hydraulic rods 6 are fixedly connected to the lifting plate 7, which connects to the mounting plate 8 and the adjustment assembly. The vertical position is adjusted by sliding along the guide rod 5, ensuring the accuracy of the hoisting point alignment. The inside of the lifting plate 7 is slidably connected to the outside of the guide rod 5. The right side of the lifting plate 7 is fixedly connected to the mounting plate 8 to fix the adjustment assembly, providing an installation reference for the motor 9 and the bidirectional threaded rod 10, ensuring the stable operation of the adjustment structure. The top of the mounting plate 8 is fixedly connected to an adjustment assembly for adjusting the hook spacing according to the size of the steel box. The bottom of the adjustment assembly is provided with a hook 13 connecting the rope 14 and the mobile plate 12 to transmit the hoisting force. The spacing is adjusted with the mobile plate 12 to adapt to different hoisting points.
[0029] The bottom of hook 13 is equipped with a connecting assembly for connecting parts. The bottom of the connecting assembly is fixedly connected to hook 2 17, which directly hangs on the lifting lug of the steel box girder to bear the lifting load. It works with baffle 19 to achieve anti-detachment locking. The connecting assembly includes a rope 14 to buffer the impact force during the lifting process and avoid damage to the parts caused by rigid connection, and a connecting plate 15 to connect the rope 14 and the fixing plate 16, transmit the lifting force and maintain the stability of the connection structure. The top of the rope 14 is sleeved on the bottom of hook 13, and the bottom of the rope 14 is sleeved on the outside of the connecting plate 15. The fixing plate 16 connects the connecting plate 15 and the fixing shaft 18, supports the baffle 19 and the spring 20, and constructs the installation foundation for hook anti-detachment locking. The top of the fixing plate 16 is fixedly connected to the connecting... At the bottom of plate 15, fixed shafts 18 are fixedly connected to both the front and rear sides of the bottom of fixed plate 16 to provide rotation fulcrum for baffle 19, allowing baffle 19 to avoid during hooking and to reset and lock after hooking. Baffle 19 is rotatably connected to the outside of both fixed shafts 18. Under the action of spring 20, baffle 19 is in close contact with hook 2 17 to form a mechanical lock and prevent the hook from falling off the lifting lug. One end of spring 20 is fixedly connected to the outside of baffle 19, and the other end of spring 20 is fixedly connected to hook 2 17. The outside of baffle 19 is in contact with the outside of hook 2 17. A spring 20 is provided on the side of baffle 19 and hook 2 17 that are close to each other to provide elastic restoring force, push baffle 19 to reset and maintain locking pressure, adapting to vibration and impact during hoisting.
[0030] Reference Figure 1 and Figure 2 The adjustment component includes a motor 9 that provides power for spacing adjustment. The motor 9 rotates through its output end, driving the bidirectional threaded rod 10 to rotate, and the bidirectional threaded rod 10 drives the moving plate 12 to slide in the opposite direction through threaded transmission, thereby adjusting the spacing of the hook 13. The bottom of the motor 9 is fixedly connected to the top of the mounting plate 8, and the right side of the bidirectional threaded rod 10 is fixedly connected to the output end of the motor 9. The moving plate 12 is threadedly connected to both the left and right sides of the motor 9 and slides along the fixed rod 11, driving the hook 13 to adjust the spacing synchronously, adapting to different steel box girder lifting point distances. The outside of the moving plate 12 is slidably connected to the inside of the lifting plate 7. The front side of the inside of the lifting plate 7 is fixedly connected to the fixed rod 11 to constrain the sliding trajectory of the moving plate 12, ensuring that the spacing adjustment process is linear and smooth, and improving the adjustment accuracy. The front side of the moving plate 12 is slidably connected to the outside of the fixed rod 11, and the top of the hook 13 is fixedly connected to the bottom of the moving plate 12.
[0031] Working principle: When using the cantilever hoisting matching device for cable-stayed bridge steel box girder, the base plate 1 first serves as the bearing foundation, providing stable support for the entire device; the electric guide rails 3 on the front and rear sides of the top of the support frame 2 are activated, driving the moving frame 4 to slide along the guide rails, precisely adjusting the device to be directly above the area where the steel box girder is to be hoisted, adapting to the hoisting position requirements of steel box girders with different spans.
[0032] The vertical lifting process then begins. Guide rods 5 on both the front and rear sides inside the movable frame 4, with both ends fixed to the movable frame 4, form a linear sliding constraint system for the lifting plate 7. Hydraulic rods 6 on the left and right sides of the bottom of the movable frame 4 are activated, pushing the lifting plate 7 smoothly downwards along the guide rods 5. This allows the mounting plate 8 and the adjusting and connecting components below it to gradually approach the lifting point area of the steel box girder. During the lifting process, the sliding cooperation between the lifting plate 7 and the guide rods 5 effectively suppresses the swaying of the lifting plate 7, ensuring the spatial accuracy of subsequent attachment actions.
[0033] Then, the lifting point spacing adjustment process begins. The adjustment component on top of the mounting plate 8 is activated, and the motor 9 rotates, driving the bidirectional threaded rod 10 to rotate. Because the left and right sides of the bidirectional threaded rod 10 are threadedly connected to the moving plate 12, and the front of the moving plate 12 is slidably connected to the fixed rod 11 inside the lifting plate 7, the outside of the moving plate 12 is synchronously slidably connected to the inside of the lifting plate 7. The moving plate 12 moves in the opposite direction along the fixed rod 11, causing the bottom hook 13 to adjust the spacing synchronously. Through the forward and reverse rotation control of the motor 9, the spacing of the lifting points at different positions of the steel box girder can be precisely adapted.
[0034] The hook-and-lock process then begins. Hook 13 is connected to connecting plate 15 via rope 14. The fixing plate 16 at the bottom of connecting plate 15 drives hook 2 17 to approach the lifting lug of the steel box girder. When hook 2 17 is engaged with the lifting lug, the baffle 19 outside the fixing shaft 18 at the bottom of fixing plate 16 is compressed and rotated, and spring 20 is stretched. When hook 2 17 is fully engaged, the elastic restoring force of spring 20 pushes baffle 19 to return to its original position, making its exterior in close contact with hook 2 17, forming a mechanical locking structure.
[0035] Then the hoisting and displacement process begins. The hydraulic rod 6 retracts, causing the lifting plate 7 to rise and smoothly lift the steel box girder. If it is necessary to adjust the horizontal position of the steel box girder, the electric guide rail 3 drives the moving frame 4 to slide again to meet the docking requirements of the cantilever hoisting.
[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A cantilever hoisting and matching device for a steel box girder of a cable-stayed bridge, comprising a base plate (1) and a fixing plate (16), characterized in that: Support frames (2) are fixedly connected to the top left and right sides of the base plate (1). Electric guide rails (3) are provided on the top front and rear sides of the two support frames (2). A movable frame (4) is provided on the top of the two electric guide rails (3). Two guide rods (5) are provided on the front and rear sides of the interior of the movable frame (4). Hydraulic rods (6) are fixedly connected to the bottom left and right sides of the movable frame (4). A lifting plate (7) is fixedly connected to the output end of the multiple hydraulic rods (6). An installation plate (8) is fixedly connected to the right side of the lifting plate (7). (8) is fixedly connected to the top of an adjustment component for adjusting the hook spacing according to the size of the steel box. The bottom of the adjustment component is provided with a hook one (13). The bottom of the hook one (13) is provided with a connecting component for connecting parts. The bottom of the connecting component is fixedly connected with a hook two (17). The bottom front and rear sides of the fixed plate (16) are fixedly connected with fixed shafts (18). The outside of the two fixed shafts (18) is rotatably connected with baffles (19). The baffles (19) and the hook two (17) are provided with springs (20) on the side close to each other.
2. The cantilever hoisting and matching device for a cable-stayed bridge steel box girder according to claim 1, characterized in that: The adjustment assembly includes a motor (9) and a bidirectional threaded rod (10). The bottom of the motor (9) is fixedly connected to the top of the mounting plate (8). The right side of the bidirectional threaded rod (10) is fixedly connected to the output end of the motor (9). Movable plates (12) are threadedly connected to both the left and right sides of the motor (9). A fixed rod (11) is fixedly connected to the front side of the inside of the lifting plate (7). The top of the hook (13) is fixedly connected to the bottom of the movable plate (12).
3. The cantilever hoisting and matching device for a cable-stayed bridge steel box girder according to claim 1, characterized in that: The connecting assembly includes a loop (14) and a connecting plate (15). The top of the loop (14) is fitted onto the bottom of the hook (13), and the bottom of the loop (14) is fitted onto the outside of the connecting plate (15). The top of the fixing plate (16) is fixedly connected to the bottom of the connecting plate (15).
4. The cantilever hoisting and matching device for a cable-stayed bridge steel box girder according to claim 1, characterized in that: One end of the spring (20) is fixedly connected to the outside of the baffle (19), and the other end of the spring (20) is fixedly connected to the hook (17).
5. The cantilever hoisting and matching device for a cable-stayed bridge steel box girder according to claim 1, characterized in that: The outside of the baffle (19) is in contact with the outside of the hook (17), and the inside of the lifting plate (7) is slidably connected to the outside of the guide rod (5).
6. The cantilever hoisting and matching device for a cable-stayed bridge steel box girder according to claim 2, characterized in that: The front side of the movable plate (12) is slidably connected to the outside of the fixed rod (11), and the outside of the movable plate (12) is slidably connected to the inside of the lifting plate (7).