A lifting lug structure for hoisting steel box girders on bridge decks

Abstract

This utility model discloses a lifting lug structure for hoisting steel box girders on bridge decks, including a steel box girder, lifting lugs, and reinforcing members. The steel box girder includes a panel, and the lifting lugs are welded to the top surface of the panel. Each lifting lug has a through hole. The front and rear sides of the lifting lug are mounting surfaces one, and the left and right sides are mounting surfaces two. The reinforcing members consist of stiffening plates one and two. Stiffening plate one is welded between mounting surface one and the top surface of the panel, and stiffening plate two is welded between mounting surface two and the top surface of the panel. This utility model can form a multi-directional support structure, effectively dispersing tensile and shear stresses during hoisting, reducing stress concentration, improving the connection strength between the lifting lugs and the steel box girder panel, and significantly enhancing the bending and torsional resistance of the lifting lugs. This prevents local deformation of the panel during hoisting, improving the safety and reliability of bridge construction.

Description

Technical Field

[0001] This utility model belongs to the field of steel box girder installation technology, specifically relating to a lifting lug structure for hoisting steel box girders on bridge decks. Background Technology

[0002] In the field of large-scale bridge steel structure manufacturing and installation, steel box girders, as core load-bearing components, directly affect the overall safety and durability of the bridge due to their processing quality. During the assembly and welding of bridge deck steel box girders in the processing plant, they require hoisting.

[0003] Traditionally, the lifting lugs on steel box girders are usually welded directly to the steel box girder panel. Because the lifting lugs bear huge tensile and shear forces during the hoisting process, traditional lifting lugs are prone to stress concentration, which can lead to cracking at the welded parts or local deformation of the panel, affecting construction safety. Utility Model Content

[0004] The purpose of this utility model is to solve the above-mentioned technical problems existing in the prior art, and to provide a lifting lug structure for hoisting steel box girders on bridge decks. This structure can form a multi-directional support structure, effectively disperse tensile and shear stresses during the hoisting process, reduce stress concentration, improve the connection strength between the lifting lug and the steel box girder panel, and significantly enhance the bending and torsional resistance of the lifting lug. This also prevents local deformation of the panel during the hoisting process and improves the safety and reliability of bridge construction.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A lifting lug structure for hoisting steel box girders on bridge decks includes a steel box girder and lifting lugs. The steel box girder includes a panel, and the lifting lugs are welded to the top surface of the panel. The lifting lugs are provided with a through hole. The structure is characterized by further including reinforcing members. The front and rear sides of the lifting lugs are mounting surfaces one, and the left and right sides of the lifting lugs are mounting surfaces two. The reinforcing members are stiffening plates one and two. Stiffening plate one is welded between mounting surface one and the top surface of the panel, and stiffening plate two is welded between mounting surface two and the top surface of the panel.

[0007] Furthermore, mounting surface one is provided with a reinforcing plate, and the reinforcing plate is provided with a second through hole, which is provided in correspondence with the first through hole and is connected to it.

[0008] Furthermore, a horizontal partition is welded to the bottom surface of the panel, and a stiffening plate three is welded between the horizontal partition and the bottom surface of the panel. The stiffening plate three and the stiffening plate one are arranged vertically and vertically respectively.

[0009] Furthermore, a stiffening plate four is welded between the bottom surface of the diaphragm and the panel, with stiffening plate four and stiffening plate two being arranged correspondingly on the top and bottom.

[0010] Furthermore, the lifting lug is detachably connected to a limiting plate, which is used to limit the steel wire rope passing through the through hole.

[0011] Furthermore, the limiting plate is provided with a groove, and the groove and the through hole are set in a corresponding manner, with the steel wire rope being limited in the groove.

[0012] Furthermore, two limiting plates are symmetrically installed on the lifting lug. The limiting plate has a first mounting hole, through which a bolt rod passes, and a nut is threadedly connected to the bolt rod. The limiting plate has a second mounting hole, and the lifting lug has a third mounting hole. Both the second and third mounting holes have a second bolt rod passing through, and a nut is threadedly connected to the bolt rod.

[0013] Furthermore, mounting hole three is an oblong hole, allowing bolt rod two to move vertically within mounting hole three.

[0014] Furthermore, a limiting block is provided on the mounting surface, and a limiting groove is provided on the limiting plate. The limiting block is embedded in the limiting groove, so that the limiting plate can move vertically on the limiting block.

[0015] Furthermore, the lifting lug is detachably connected to a support component, and two symmetrical support components are provided on the same mounting surface, with the two support components pressing against the limiting plate.

[0016] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0017] This utility model forms a multi-directional support structure by setting stiffening plates on the front and rear sides of the lifting lug and stiffening plates on the left and right sides, which effectively disperses tensile and shear stresses during the hoisting process, reduces stress concentration, and improves the connection strength between the lifting lug and the steel box girder panel.

[0018] Stiffening plate one and stiffening plate two are welded to mounting surface one and mounting surface two of the lifting lug, respectively, and form a stable support structure with the steel box girder panel, significantly enhancing the bending and torsional resistance of the lifting lug and preventing local deformation of the panel during hoisting.

[0019] The lifting lug reinforcement structure of this utility model can be widely used in the hoisting construction of various steel box girder bridges, especially suitable for the hoisting needs of large-span, large-tonnage steel box girders, and has good promotion value. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0022] Figure 2 This is a schematic diagram of the lifting lug structure in Embodiment 1 of this utility model;

[0023] Figure 3 for Figure 2 Top view;

[0024] Figure 4This is a schematic diagram of the structure of stiffening plate one and stiffening plate two welded to the lifting lug in Embodiment 1 of this utility model;

[0025] Figure 5 This is a schematic diagram of the connection between the panel and the transverse partition in Embodiment 1 of this utility model;

[0026] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0027] Figure 7 This is a schematic diagram of the lifting lug structure in Embodiment 2 of this utility model;

[0028] Figure 8 This is a schematic diagram of the connection between the two limiting plates in Embodiment 2 of this utility model;

[0029] Figure 9 This is a schematic diagram of the limiting plate in Embodiment 2 of this utility model;

[0030] Figure 10 This is a schematic diagram of the support member in Embodiment 2 of this utility model;

[0031] Figure 11 This is a schematic diagram of the structure of the two support members pressing and limiting plate in Embodiment 2 of this utility model.

[0032] In the diagram, 11 - panel; 12 - diaphragm;

[0033] 2-Lifting lug; 21-Mounting surface one; 22-Mounting surface two; 23-Through hole one; 24-Reinforcing plate; 25-Through hole two; 26-Mounting hole three; 27-Limiting block; 28-Through hole three;

[0034] 31-Stretcher plate one; 32-Stretcher plate two; 33-Stretcher plate three; 34-Stretcher plate four;

[0035] 41-Limiting plate; 42-Bolt rod one; 43-Bolt rod two; 44-Slot; 45-Mounting hole one; 46-Mounting hole two; 47-Limiting slot; 48-Nut one; 49-Nut two; 410-Supporting component;

[0036] a- Steel wire rope. Detailed Implementation

[0037] like Figures 1 to 5 The image shown is an embodiment of this utility model.

[0038] A lifting lug structure for hoisting steel box girders on bridge decks includes a steel box girder and lifting lugs 2. The steel box girder includes a panel 11, with a transverse diaphragm 12 welded to the bottom surface of the panel 11. The lifting lugs 2 are welded to the top surface of the panel 11, and the thickness of the lifting lugs 2 is 40mm, made of Q355B material. The lifting lugs 2 have a through hole 23 for connecting hoisting equipment. In the prior art, a wire rope a is passed through the through hole 23, and the end of the wire rope a is connected to a shackle. The other end of the shackle is connected to the hook of the hoisting equipment.

[0039] The front and rear sides of the lifting lug 2 are mounting surfaces 1 21, and the left and right sides are mounting surfaces 22. Mounting surface 1 21 is provided with a reinforcing plate 24, which has a through hole 25. The through hole 25 and through hole 1 23 are correspondingly provided and connected. The reinforcing plate 24 thickens the lifting lug 2, increasing its strength. Stiffening plate 1 31 is welded between mounting surface 1 21 and the top surface of panel 11, and stiffening plate 2 32 is welded between mounting surface 2 22 and the top surface of panel 11. Stiffening plate 1 31 and stiffening plate 2 32 constitute a reinforcing member, forming a multi-directional support structure. The reinforcing member distributes the load of the lifting lug 2 to the panel 11 of the steel box girder, effectively dispersing tensile and shear stresses during hoisting, reducing stress concentration, and improving the connection strength between the lifting lug 2 and the steel box girder panel 11. Stiffening plate 31 and stiffening plate 32 are welded to mounting surfaces 21 and 22 of the lifting lug 2, respectively, forming a stable support structure with the steel box girder panel 11. This significantly enhances the bending and torsional resistance of the lifting lug 2 and prevents local deformation of the panel 11 during hoisting. This invention can be widely applied to the hoisting construction of various steel box girder bridges, especially suitable for the hoisting needs of large-span, large-tonnage steel box girders, and has good promotional value.

[0040] A stiffening plate 33 is welded between the bottom surface of the diaphragm 12 and the panel 11, and stiffening plate 33 and stiffening plate 31 are arranged vertically in correspondence. A stiffening plate 44 is welded between the bottom surface of the diaphragm 12 and the panel 11, and stiffening plate 44 and stiffening plate 22 are arranged vertically in correspondence. Stiffening plates 33 and 44 can significantly improve the resistance of the panel 11 to local buckling in the lifting point area, preventing the panel 11 from being crushed or warped due to high stress during lifting, which is especially important for large-tonnage steel box girders.

[0041] like Figures 6 to 11 The image shown is a second embodiment of this utility model.

[0042] Based on the structure of Embodiment 1, this utility model takes into account that when the wire rope a passes through the through hole 23 of the lifting lug 2, the wire rope a may slip and cause load eccentricity. Therefore, a limiting plate 41 is provided on the lifting lug 2. The limiting plate 41 has a groove 44, which is correspondingly provided with the through hole 23. The wire rope a is limited in the groove 44 to prevent the wire rope a from slipping out, which can avoid load eccentricity caused by the slippage of the wire rope a and ensure the stability of the hoisting.

[0043] Two limiting plates 41 are symmetrically installed on the lifting lug 2. Each limiting plate 41 has a first mounting hole 45 through which a first bolt rod 42 passes, and the first bolt rod 42 is threadedly connected to a first nut 48. The limiting plate 41 also has a second mounting hole 46, and the lifting lug 2 has a third mounting hole 26. Both the second and third mounting holes 46 have second bolt rods 43 passing through them, and the second bolt rod 43 is threadedly connected to a second nut 49. This design allows the limiting plates 41 to be detachably connected to the lifting lug 2. When the limiting plates 41 are no longer needed, they can be removed promptly. Furthermore, the detachable design allows for the replacement of matching limiting plates 41 according to the diameter of the wire rope a, adapting to different specifications of wire rope a and improving versatility.

[0044] Mounting hole 3 26 is an elongated hole, allowing bolt rod 2 43 to move vertically within it. This vertical movement of bolt rod 2 43 allows the limiting plate 41 to be adjusted up and down according to the actual insertion position of wire rope a, ensuring the limiting plate 41 remains tightly against wire rope a and preventing it from slipping due to wire rope a swinging. This is suitable for different lifting angles. A limiting block 27 is located in the middle of mounting surface 1 21, and the limiting plate 41 has a limiting groove 47. The limiting block 27 is embedded in the limiting groove 47, allowing the limiting plate 41 to move vertically on the limiting block 27, restricting the horizontal displacement of the limiting plate 41 and preventing the nut from loosening due to vibration.

[0045] The lifting lug 2 is equipped with a support member 410, which is fixed to the lifting lug 2 by a fixing bolt and a nut. The fixing bolt passes through the through hole 28 of the lifting lug 2. Two symmetrical support members 410 are provided on the same mounting surface 21. The two support members 410 press against the limiting plate 41, forming a bidirectional clamping effect on the limiting plate 41, which enhances the impact resistance of the limiting plate 41. Moreover, the support member 410 can serve as an additional force transmission path, sharing the load with the bolt rod 43, reducing the shear stress of the bolt rod 43, and preventing thread stripping.

[0046] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A lifting lug structure for hoisting a steel box girder on a bridge deck, comprising a steel box girder and a lifting lug, wherein the steel box girder includes a panel, the lifting lug is welded to the top surface of the panel, and the lifting lug is provided with a through hole; Its features are, It also includes reinforcing components; The front and rear sides of the lifting lug are mounting surfaces one, and the left and right sides of the lifting lug are mounting surfaces two. The reinforcing member consists of stiffening plate one and stiffening plate two. Stiffening plate one is welded between mounting surface one and the top surface of the panel, and stiffening plate two is welded between mounting surface two and the top surface of the panel.

2. The lifting lug structure for hoisting steel box girders on bridge decks according to claim 1, characterized in that: The mounting surface is provided with a reinforcing plate, and the reinforcing plate is provided with a through hole. The through hole is provided in correspondence with the through hole and is connected to it.

3. The lifting lug structure for hoisting steel box girders on bridge decks according to claim 1, characterized in that: A horizontal partition is welded to the bottom surface of the panel, and a stiffening plate three is welded between the horizontal partition and the bottom surface of the panel. The stiffening plate three and the stiffening plate one are arranged vertically in correspondence.

4. A lifting lug structure for hoisting steel box girders on bridge decks according to claim 3, characterized in that: A stiffening plate four is welded between the bottom surface of the diaphragm and the panel, and the stiffening plate four and the stiffening plate two are arranged vertically and vertically respectively.

5. A lifting lug structure for hoisting steel box girders on bridge decks according to claim 1, characterized in that: The lifting lug is detachably connected to a limiting plate, which is used to limit the steel wire rope passing through the through hole.

6. A lifting lug structure for hoisting steel box girders on bridge decks according to claim 5, characterized in that: The limiting plate is provided with a groove, and the groove and the through hole are provided in a corresponding manner, and the wire rope is limited in the groove.

7. A lifting lug structure for hoisting steel box girders on bridge decks according to claim 6, characterized in that: Two limiting plates are symmetrically installed on the lifting lug. Each limiting plate has a first mounting hole, through which a first bolt rod passes, and a first nut is threadedly connected to the first bolt rod. The limiting plate also has a second mounting hole, and the lifting lug has a third mounting hole. Both the second and third mounting holes have a second bolt rod passing through, and a second nut is threadedly connected to the second bolt rod.

8. A lifting lug structure for hoisting steel box girders on bridge decks according to claim 7, characterized in that: The third mounting hole is an oblong hole, and the second bolt rod can move vertically within the third mounting hole.

9. A lifting lug structure for hoisting steel box girders on bridge decks according to claim 8, characterized in that: The mounting surface is provided with a limiting block, and the limiting plate is provided with a limiting groove. The limiting block is embedded in the limiting groove, so that the limiting plate can move vertically on the limiting block.

10. A lifting lug structure for hoisting steel box girders on bridge decks according to claim 5, characterized in that: The lifting lug is detachably connected to a support member. Two symmetrical support members are provided on the same mounting surface, and the two support members press against the limiting plate.

Images