Precast beam hoisting device for bridge construction
By designing a precast beam hoisting device that connects the hook to the precast beam, wear on the slings is avoided, stable hoisting is achieved, and it can adapt to different precast beam sizes, thus solving the safety hazards and instability problems of traditional hoisting methods.
Patent Information
- Application Number
- CN202423034903.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-12-10
AI Technical Summary
In the traditional process of hoisting precast box girders, steel wire ropes can easily damage the concrete at the edges of the bottom slab and flanges of the precast box girder, and the hoisting is unstable, posing safety hazards.
Design a precast beam hoisting device for bridge construction. The device uses hooks to connect with the precast beams to avoid direct contact with the slings. The hooks are attached to the four sides of the precast beams and combined with adjustable connecting rods and telescopic rods to adapt to different precast beam sizes.
It effectively avoids friction and wear between the slings and the precast beams, improves the stability and safety of hoisting, and is adaptable to different widths and lengths of precast beams.
Smart Images
Figure CN223509490U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge construction technology, and more specifically, to a precast beam hoisting device for bridge construction. Background Technology
[0002] Precast box girders are widely used in bridge construction. During the installation of precast box girders with reinforced concrete structures, they need to be lifted to the designated position by wire rope slings. Traditional precast box girder hoisting operations use wire ropes to directly lift the bottom of the girder. During the hoisting process, the wire ropes are prone to damaging the concrete at the bottom plate and flange edges of the precast box girder, affecting the quality of the box girder. Because the corner edges of the precast box girder are too sharp, the wire ropes are also prone to wear during hoisting. The repeated use of hoisting wire ropes can lead to safety hazards, and the hoisting structure is also unstable. Utility Model Content
[0003] To overcome the shortcomings mentioned above, this utility model aims to provide a precast beam hoisting device for bridge construction that can solve the above problems.
[0004] A precast beam hoisting device for bridge construction includes a lifting beam, a connecting rod, a lower sling, a hook, and an upper sling. Two lifting beams are horizontally and parallel to each other; the connecting rod is positioned between the two lifting beams to connect them; the lower sling includes a first lower sling located at the bottom of the lifting beam and a second lower sling located at both ends of the lifting beam, with the upper ends of the first and second lower slings connected to the lifting beam; the hook is connected to the lower end of either the first or second lower sling and is positioned around the precast beam; the upper sling is located at the top of the lifting beam and is used to connect a crane.
[0005] Furthermore, the hook includes a horizontally arranged upper arm, a lower arm, and a connecting arm connecting the upper arm and the lower arm. The lower arm is longer than the upper arm and both are longitudinally aligned at one end. The connecting arm is fixed to the aligned end of the upper arm and the lower arm. The two ends of the precast beam to be connected are provided with horizontal lifting holes. The hook is engaged at the edge of the top plate of the precast beam or the lower arm of the hook is inserted into the lifting hole.
[0006] Furthermore, it also includes a hanging plate, which is disposed above the hanging beam. The hanging plate and the hanging beam are connected by connecting cables. Multiple connecting cables are connected at equal intervals on the upper surface of the hanging beam. The upper hanging plate is connected to the four corners of the upper surface of the hanging plate, and the upper end of the upper hanging cable is connected to the main lifting ring.
[0007] Furthermore, the connecting rod includes a first sleeve, a screw, and an adjusting nut. The adjusting nut is rotatably connected to one end of the first sleeve, and one end of the screw is threadedly connected to the adjusting nut and inserted into the first sleeve. The ends of the first sleeve and the screw that are far apart from each other are respectively fixedly connected to the two lifting beams.
[0008] Furthermore, the inner diameter of the adjusting nut is smaller than the inner diameter of the first sleeve, and a first limiting plate is fixed to one end of the screw inserted into the first sleeve.
[0009] Furthermore, a guide rod is provided between the two lifting beams. The guide rod includes a second sleeve and a sliding rod. One end of the sliding rod is slidably inserted into the second sleeve, and the ends of the second sleeve and the sliding rod that are far apart from each other are respectively fixedly connected to the two lifting beams.
[0010] Furthermore, a mobile trolley is provided at the bottom of the lifting beam, and the upper end of the first lower sling is connected to the mobile trolley.
[0011] Furthermore, the vertical cross-section of the lifting beam has an I-shaped structure.
[0012] Furthermore, telescopic rods are provided at both ends of the lifting beam, with the fixed end of the telescopic rod fixedly connected to the lifting beam and the extended end of the telescopic rod connected to the upper end of the second lower sling.
[0013] Furthermore, the telescopic rod is an electro-hydraulic actuator.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] The precast beam hoisting device for bridge construction in this utility model consists of two lifting beams, with a first lower sling and a second lower sling connected to the bottom and both ends of the beams, respectively. Hooks are attached to the lower ends of both the first and second lower slings, and these hooks are positioned around the perimeter of the precast beam to lift it. The slings do not directly contact the precast beam; instead, they are connected via hooks, thus preventing friction and wear on the slings. Furthermore, the hooks around the perimeter of the precast beam ensure stable lifting.
[0016] The precast beam hoisting device for bridge construction in this utility model features an adjustable-length connecting rod between two lifting beams, allowing for adjustment of the distance between the two beams and thus accommodating precast beams of varying widths. A movable trolley is installed at the bottom of the lifting beams, with a first lower sling connected to the trolley, enabling adjustment of the hook position on the first lower sling. Telescopic rods are installed at both ends of the lifting beams, with a second lower sling connected to the extended end of the telescopic rod, allowing for adjustment of the hook position on the second lower sling, further adapting to the width and length of the precast beams. Attached Figure Description
[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0018] Figure 1 This is a schematic diagram showing the usage status of the precast beam hoisting device for bridge construction in this embodiment of the present utility model.
[0019] Figure 2 This is a schematic diagram of the precast beam hoisting device for bridge construction from another perspective in this utility model embodiment.
[0020] Figure 3 This is a schematic diagram of the overall structure of the precast beam hoisting device for bridge construction in this embodiment of the present invention.
[0021] Figure 4 This is a schematic diagram of the structure of the mobile trolley in an embodiment of this utility model.
[0022] Figure 5 This is a schematic diagram of the hook structure in an embodiment of this utility model.
[0023] In the diagram: 1. Lifting beam; 2. First lower lifting sling; 3. Second lower lifting sling; 4. Hook; 401. Upper boom; 402. Lower boom; 403. Connecting boom; 5. Upper lifting sling; 6. Lifting plate; 7. Connecting cable; 8. Main lifting ring; 9. First sleeve; 10. Screw; 11. Adjusting nut; 12. Second sleeve; 13. Slide rod; 14. Moving trolley; 1401. Frame; 1402. Drive wheel; 1403. Driven wheel; 1404. Motor; 1405. First gear; 1406. Rotating shaft; 1407. Second gear; 15. Telescopic rod. Detailed Implementation
[0024] 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.
[0025] like Figure 1 , Figure 2 and Figure 3 As shown, the precast beam hoisting device for bridge construction in this embodiment includes, from top to bottom, a main lifting ring 8, an upper lifting cable 5, a lifting plate 6, a connecting cable 7, a lifting beam 1 and a connecting rod, a lower lifting cable, and a hook 4.
[0026] In this embodiment, the lifting platform 6 has a rectangular structure. Each of the four corners of the upper surface of the lifting platform 6 is connected to an upper lifting cable 5. The upper ends of the four upper lifting cables 5 are connected to a main lifting ring 8, which is used to connect to external lifting equipment, such as a crane. Two lifting beams 1 are horizontally and parallel to each other below the lifting platform 6, and the length direction of the lifting beams 1 is parallel to that of the lifting platform 6. The lifting platform 6 and the lifting beams 1 are connected by connecting cables 7, and multiple connecting cables 7 are evenly spaced on the upper surface of the lifting beams 1. A connecting rod is disposed between the two lifting beams 1 to connect them.
[0027] Specifically, the connecting rod includes a first sleeve 9, a screw 10, and an adjusting nut 11. The adjusting nut 11 is rotatably connected to one end of the first sleeve 9. One end of the screw 10 is threadedly connected to the adjusting nut 11 and inserted into the first sleeve 9. By rotating the adjusting nut 11, the length of the screw 10 extending into the first sleeve 9 is adjusted, thereby adjusting the overall length of the connecting rod and, consequently, the distance between the two lifting beams 1 to accommodate precast beams of different widths. The ends of the first sleeve 9 and the screw 10 that are far apart from each other are fixedly connected to the two lifting beams 1 respectively. The inner diameter of the adjusting nut 11 is smaller than the inner diameter of the first sleeve 9. A first limiting plate is fixed to the end of the screw 10 inserted into the first sleeve 9. The outer diameter of the first limiting plate is larger than the outer diameter of the screw 10, thereby preventing the screw 10 from coming out of the first sleeve 9.
[0028] In this embodiment, a guide rod is also provided between the two lifting beams 1. The connecting rod is located in the middle of the lifting beam 1, and the two guide rods are respectively located on both sides of the connecting rod. Specifically, the guide rod includes a second sleeve 12 and a sliding rod 13. One end of the sliding rod 13 is slidably inserted into the second sleeve 12, and the ends of the second sleeve 12 and the sliding rod 13 that are far apart from each other are respectively fixedly connected to the two lifting beams 1. Preferably, the inner diameter of the second sleeve 12 is larger than the outer diameter of the sliding rod 13. A retaining ring is fixed at the end of the second sleeve 12 near the sliding rod 13. The inner diameter of the retaining ring is smaller than the inner diameter of the second sleeve 12. A second limiting plate is fixed at the end of the sliding rod 13 that extends into the second sleeve 12. The outer diameter of the second limiting plate is larger than the inner diameter of the retaining ring, thereby preventing the sliding rod 13 from coming out of the second sleeve 12. By providing the guide rod, the guide rod extends and shortens at the same time as the connecting rod, which strengthens the connection between the two lifting beams 1 without affecting the adjustment of the distance between the two lifting beams 1.
[0029] In this embodiment, the vertical cross-section of the lifting beam 1 is I-shaped, specifically made of I-beams. A trolley 14 capable of moving back and forth on the lifting beam 1 is provided at its bottom. Telescopic rods 15 are provided at both ends of the lifting beam 1, with the fixed ends of the telescopic rods 15 fixedly connected to the lifting beam 1. The lower slings include a first lower sling 2 and a second lower sling 3. Hooks 4 are connected to the lower ends of both the first lower sling 2 and the second lower sling 3. The upper end of the first lower sling 2 is connected to the trolley 14, and the upper end of the second lower sling 3 is connected to the extended end of the telescopic rod 15.
[0030] Specifically, such as Figure 4 As shown, the mobile trolley 14 includes a frame 1401, drive wheels 1402, driven wheels 1403, a motor 1404, a first gear 1405, and a rotating shaft 1406. The frame 1401 is U-shaped and partially enclosed under the hanging beam 1. Two pairs of opposing drive wheels 1402 and driven wheels 1403 are installed on the inner side of the frame 1401, and both drive wheels 1402 and driven wheels 1403 are rotatably connected to the hanging beam 1. The motor 1404 is fixed to the outside of the frame 1401. The output shaft of the motor 1404 is fixedly connected to the rotating shaft 1406. The rotating shaft 1406 is rotatably connected to the frame 1401 and the first gear 1405 is fixed at both ends. The drive wheel 1402 is fixed to the side of the frame 1401 with a second gear 1407 that meshes with the first gear 1405. The bottom surface of the frame 1401 is fixed with a lower hanging ring. The upper end of the first lower hanging cable 2 is connected to the mobile trolley 14 through the lower hanging ring.
[0031] The telescopic rod 15 is specifically an electro-hydraulic actuator or an electric telescopic rod 15.
[0032] In this embodiment, multiple hooks 4 are positioned around the precast beam. Specifically, the hook 4 at the lower end of the first lower sling 2 is positioned at the edge of the top slab of the precast beam, and the hook 4 at the lower end of the second lower sling 3 is positioned at both ends of the precast beam to be connected, thereby forming a stable connection structure for hoisting the precast beam. Figure 5 As shown, the hook 4 in this embodiment includes a horizontally arranged upper arm 401, a lower arm 402, and a connecting arm 403 connecting the upper arm 401 and the lower arm 402. The lower arm 402 is longer than the upper arm 401 and both are longitudinally aligned at one end. The connecting arm 403 is fixed to the aligned end of the upper arm 401 and the lower arm 402. The two ends of the precast beam to be connected are provided with horizontal lifting holes. The upper arm 401 and the lower arm 402 of the hook 4 at the lower end of the first lower cable 2 are engaged on the upper and lower surfaces of the edge of the top plate of the precast beam. The upper arm 401 of the hook 4 at the lower end of the second lower cable 3 is engaged on the upper surface of the precast beam, and the lower arm 402 is inserted into the lifting hole, thereby hooking the hook 4 around the precast beam. The lower ends of the first lower cable 2 and the second lower cable 3 are connected to the end of the upper arm 401 away from the connecting arm 403, forming a stable connection structure.
[0033] In this embodiment, the upper sling 5, the connecting sling 7, the first lower sling 2, and the second lower sling 3 are all steel wire ropes.
[0034] The working principle of the precast beam hoisting device for bridge construction in this embodiment is as follows:
[0035] Two lifting beams 1 are installed, with a first lower sling 2 and a second lower sling 3 connected to the bottom and both ends of each beam 1, respectively. Hooks 4 are attached to the lower ends of both the first and second lower slings 2 and 3. These hooks 4 are hooked around the perimeter of the precast beam, thus lifting it. The slings do not directly contact the precast beam; instead, they are connected via the hooks 4, preventing friction and wear on the slings. The hooks 4 are also present around the perimeter of the precast beam, ensuring stable lifting. The connecting rod between the two lifting beams 1 has an adjustable length, allowing for adjustment of the distance between them and accommodating precast beams of varying widths. A movable trolley 14 is provided at the bottom of the lifting beam 1. The first lower sling 2 is connected to the movable trolley 14, so that the position of the hook 4 on the first lower sling 2 can be adjusted. Telescopic rods 15 are installed at both ends of the lifting beam 1. The second lower sling 3 is connected to the extended end of the telescopic rod 15, so that the position of the hook 4 on the second lower sling 3 can be adjusted to further adapt to the width and length of the precast beam.
[0036] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.
Claims
1. A precast beam hoisting device for bridge construction, characterized in that, include: The two lifting beams (1) are arranged horizontally and parallel to each other; A connecting rod is disposed between the two lifting beams (1) for connecting the two lifting beams (1); The lower suspension cable includes a first lower suspension cable (2) disposed at the bottom of the suspension beam (1) and a second lower suspension cable (3) disposed at both ends of the suspension beam (1), the upper ends of the first lower suspension cable (2) and the second lower suspension cable (3) being connected to the suspension beam (1); A hook (4) is connected to the lower end of the first lower sling (2) or the second lower sling (3), and the hook (4) is hooked around the perimeter of the precast beam; and The upper sling (5) is located on the top of the lifting beam (1) and is used to connect the crane.
2. The precast beam hoisting device for bridge construction according to claim 1, characterized in that, The hook (4) includes a horizontally arranged upper boom (401), a lower boom (402), and a connecting arm (403) connecting the upper boom (401) and the lower boom (402). The lower boom (402) is longer than the upper boom (401) and both are longitudinally aligned at one end. The connecting arm (403) is fixed to the end of the upper boom (401) and the lower boom (402) that are aligned. The two ends of the precast beam to be connected are provided with horizontal lifting holes. The hook (4) is engaged at the edge of the top plate of the precast beam or the lower boom (402) of the hook (4) is inserted into the lifting hole.
3. The precast beam hoisting device for bridge construction according to claim 2, characterized in that, It also includes a hanging plate (6), which is set above the hanging beam (1). The hanging plate (6) and the hanging beam (1) are connected by connecting cables (7). Multiple connecting cables (7) are connected at equal intervals on the upper surface of the hanging beam (1). The upper hanging cable (5) is connected at the four corners of the upper surface of the hanging plate (6), and the upper end of the upper hanging cable (5) is connected to the main lifting ring (8).
4. The precast beam hoisting device for bridge construction according to claim 3, characterized in that, The connecting rod includes a first sleeve (9), a screw (10) and an adjusting nut (11). The adjusting nut (11) is rotatably connected to one end of the first sleeve (9). One end of the screw (10) is threadedly connected to the adjusting nut (11) and inserted into the first sleeve (9). The ends of the first sleeve (9) and the screw (10) that are far apart from each other are respectively fixedly connected to the two lifting beams (1).
5. The precast beam hoisting device for bridge construction according to claim 4, characterized in that, The inner diameter of the adjusting nut (11) is smaller than the inner diameter of the first sleeve (9), and the end of the screw (10) inserted into the first sleeve (9) is fixed with a first limiting plate.
6. The precast beam hoisting device for bridge construction according to claim 5, characterized in that, A guide rod is also provided between the two lifting beams (1). The guide rod includes a second sleeve (12) and a sliding rod (13). One end of the sliding rod (13) is slidably inserted into the second sleeve (12). The ends of the second sleeve (12) and the sliding rod (13) that are far apart from each other are respectively fixedly connected to the two lifting beams (1).
7. The precast beam hoisting device for bridge construction according to claim 1, characterized in that, The bottom of the lifting beam (1) is provided with a moving trolley (14), and the upper end of the first lower sling (2) is connected to the moving trolley (14).
8. The precast beam hoisting device for bridge construction according to claim 7, characterized in that, The vertical cross-section of the suspension beam (1) is I-shaped.
9. The precast beam hoisting device for bridge construction according to claim 1, characterized in that, The lifting beam (1) is provided with telescopic rods (15) at both ends. The fixed end of the telescopic rod (15) is fixedly connected to the lifting beam (1), and the extended end of the telescopic rod (15) is connected to the upper end of the second lower sling (3).
10. The precast beam hoisting device for bridge construction according to claim 9, characterized in that, The telescopic rod (15) is an electro-hydraulic actuator.