Bridge steel box girder hoisting structure

Abstract

The utility model provides a bridge steel box girder hoisting structure, which is characterized in that a support frame can be assembled with hoisting hole sites reserved at the top of a steel box girder by bolts through mounting seats with a plurality of threaded mounting holes, and the distance between the mounting seats can be adjusted through a telescopic component, so that the bridge steel box girder hoisting structure can adapt to the assembly between two hoisting hole sites with different distances; the lifting frame can be used for lifting of lifting equipment through a lifting steel wire rope, and the lifting frame and the supporting frame can be detachably assembled through an insertion structure of the supporting frame and an insertion assembly of the lifting frame. According to the steel box girder hoisting device, the hoisting size is adjustable, the steel box girder hoisting device can meet the hoisting requirements of more steel box girders, through the detachable structural design between the steel box girder hoisting device and the steel box girders, the traditional operation links of welding and cutting off the hoisting lugs are omitted, the hoisting operation of the steel box girders is simplified, and the construction convenience is improved.

Description

Technical Field

[0001] The utility model relates to the field of bridge construction, in particular to a bridge steel box girder hoisting structure. Background Art

[0002] Steel box girders are a common structural form for long-span bridges. During the construction of bridges, the lifting structure is used to lift the steel box girders. It is necessary to weld lifting ears on the steel box girders and then cut them off after the lifting is completed. After cutting, they cannot be used again, which restricts the convenience of construction and cost control. In addition, the size of the lifting structure is fixed and cannot adapt to the lifting needs of steel box girders of different specifications and models. The configuration of multiple lifting structures also increases the construction cost. Utility Model Content

[0003] In order to solve the above technical problems, the utility model proposes a bridge steel box girder hoisting structure with adjustable hoisting dimensions, which can adapt to the hoisting needs of more steel box girders. The detachable structural design between the steel box girder eliminates the traditional welding and cutting of lifting ears, simplifies the hoisting operation of the steel box girder and improves the construction convenience.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A bridge steel box girder hoisting structure, which has the following structural characteristics: a plurality of hoisting holes are reserved on the top of the steel box girder, the plurality of hoisting holes are grouped in pairs, the plurality of groups are symmetrically distributed along the beam width direction and spaced along the beam length direction, the two hoisting holes in each group are spaced along the beam width direction according to a spacing D, and each hoisting hole is provided with a plurality of screw holes; the bridge steel box girder hoisting structure comprises:

[0006] The support frame is used for detachable assembly with the steel box girder; a pair of mounting components are symmetrically arranged on both sides along the length direction at the bottom end, and each side mounting component includes a pair of mounting seats aligned along the width direction and distributed according to the spacing D. The mounting seats are provided with a plurality of threaded mounting holes corresponding to the screw hole specifications and distribution forms of each lifting hole position, and the bottom surface of the mounting seat can be adaptively fitted to the top surface of the steel box girder at the lifting hole position, and the threaded mounting holes and screw holes aligned at various locations between the steel box girder are fastened by bolts, and the spacing A between the pair of mounting components along the length direction is adjustable through the telescopic component carried by the support frame, and the spacing A is adapted to the spacing between the two groups of lifting holes along the length direction of the beam; a plug-in structure is provided at the top of the support frame for detachable assembly with the lifting frame;

[0007] The lifting frame can be detachably and centrally assembled at the top of the support frame through the plug-in assembly between the plug-in components it carries. It is provided with multiple groups of steel cable assemblies at the top that are centrosymmetrically distributed around the centroid of the overall hoisting structure of the bridge steel box girder. Each group of steel cable assemblies includes a guide wheel and a lifting steel wire rope. The guide wheel can rotate around a horizontally arranged wheel axle, and the lifting steel wire rope is wound around the outer circumference of the guide wheel. The two free rope ends are used for hoisting by an external hoisting device.

[0008] The structural features of the present utility model also lie in:

[0009] The telescopic assembly includes a pair of telescopic arms that are symmetrically arranged along the long direction and overhang on both sides of the support frame. Each telescopic arm on each side is in a "C"-shaped frame structure, with the closed end facing outwards and provided with a pair of the mounting seats. The open end faces the support frame and slides through the reserved sliding grooves on the lifting frame along the two side arms parallel to the long direction of the support frame. A rack is arranged on one of the side arms along the long direction of the support frame. A set of motor and driving gear is respectively arranged on the support frame corresponding to each telescopic arm on each side as a driving assembly. The motor drives the driving gear to rotate, and through the meshing transmission between the gear and the rack of the corresponding telescopic arm on that side, the telescopic arm is driven to slide along the long direction of the support frame.

[0010] The two sets of driving assemblies configured on the lifting frame corresponding to the pair of telescopic arms are located on both sides of the support frame along the width direction.

[0011] A pair of telescopic arms are staggered along the width direction of the lifting frame.

[0012] A telescopic rod is connected between the telescopic assembly and the support frame, and the telescopic rod is telescopable along the long direction of the support frame.

[0013] The plug-in structure includes a pair of connecting seats that are spaced apart and arranged on the top of the support frame. Jacks are respectively provided on the pair of connecting seats; the two sets of plug-in components are respectively matched with the pair of connecting seats and are arranged at the bottom of the lifting frame. Each set of plug-in components includes a hydraulic cylinder, a slider, and a plug rod. When the lifting frame and the support frame are assembled, for each set of plug-in components and the matching connecting seat, the hydraulic cylinder drives the slider to slide on the lifting frame, driving the plug rod to extend out and be inserted into the jack in a matching manner.

[0014] Compared with the prior art, the beneficial effects of the present utility model are reflected in:

[0015] First, the hoisting structure is detachable and adjustable in size, with excellent flexibility and applicability;

[0016] The distance between a pair of mounting components directly used for assembling with the steel box girder can be adjusted by the telescopic assembly, and it can more flexibly adapt to different distribution distances of the hoisting holes on the steel box girder; the support frame and the lifting frame are detachable, and through the cooperation of the plug-in structure and the plug-in components, the disassembly and assembly operations are simplified and the disassembly and assembly difficulty is reduced, which is beneficial to improving the construction efficiency and reducing the construction time.

[0017] Second, the hoisting structure and the steel box girder are detachably assembled and can be used cyclically, which is conducive to convenient construction and cost control;

[0018] It can be assembled with a pair of installation components and the steel box girder, and the difficulty of disassembly and assembly is low. It can be disassembled after the lifting operation is completed, eliminating the welding and cutting steps. It not only makes the lifting operation more convenient, but also saves the construction cost and consumables cost caused by the original welding and cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the support frame;

[0021] Figure 3 It is a schematic diagram of the structure of the lifting frame;

[0022] Figure 4 It is a schematic diagram of the local structure of the drive component.

[0023] In the figure:

[0024] 1 support frame;

[0025] 11 mounting seat; 111 threaded mounting hole;

[0026] 12 plug-in structure; 121 connection seat; 122 plug hole; 123 reinforcement rib;

[0027] 13 telescopic assembly; 131 telescopic arm; 132 rack; 133 motor; 134 driving gear; 135 telescopic rod;

[0028] 2 lifting frame;

[0029] 21 plug-in assembly; 211 hydraulic cylinder; 212 slider; 213 plug-in rod; 214 mounting plate; 215 guide rod;

[0030] 221 guide wheel; 222 lifting wire rope. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Please refer to Figures 1 to 4, the lifting structure of the bridge steel box girder in this embodiment is set as follows:

[0033] Multiple lifting holes are reserved at the top of the steel box girder. The multiple lifting holes are grouped in pairs. The multiple groups are symmetrically distributed along the beam width direction and spaced along the beam length direction. The two lifting holes in each group are aligned along the beam width direction and spaced at an interval D. Each lifting hole is provided with multiple screw holes; the lifting structure of the bridge steel box girder includes:

[0034] Support frame 1, used for detachable assembly with the steel box girder; at the bottom, a pair of mounting components are symmetrically arranged on both sides along the long direction. Each side mounting component includes a pair of mounting seats 11 that are aligned along the width direction and spaced at an interval D. Multiple threaded mounting holes 111 are provided on the mounting seat 11 corresponding to the screw hole specifications and distribution forms of each lifting hole. The bottom surface of the mounting seat 11 can be adaptively attached to the top surface of the steel box girder at the lifting hole position. The threaded mounting holes 111 and the screw holes that are aligned at each place between the mounting seat 11 and the steel box girder are fastened by bolts. The distance A along the long direction between the pair of mounting components is adjustable by the telescopic component 13 carried by the support frame 1, and the distance A is adapted to the distance between two groups of lifting holes along the beam length direction; a plug-in structure 12 is provided at the top of the support frame 1 for detachable assembly with the lifting frame 2.

[0035] Lifting frame 2 can be detachably and centrally assembled at the top of the support frame 1 through the plug-in assembly between the plug-in component 21 it carries and the plug-in structure 12. Multiple groups of steel cable components are provided at the top, which are centrally symmetrically distributed around the centroid of the overall lifting structure of the bridge steel box girder. Each group of steel cable components includes a guide wheel 221 and a lifting steel wire rope 222. The guide wheel 221 can rotate around a horizontally arranged wheel shaft. The lifting steel wire rope 222 is wound around the outer circumference of the guide wheel 221, and the two free rope ends are used for external lifting equipment to lift.

[0036] The corresponding structural settings of the above bridge steel box girder lifting structure also include:

[0037] The telescopic component 13 includes a pair of telescopic arms 131 that are symmetrically arranged along the long direction and overhang on both sides of the support frame 1. Each telescopic arm 131 on each side is in a "C"-shaped frame structure, with the closed end facing outwards and a pair of mounting seats 11 provided. The open end faces the support frame 1 and slides through the sliding grooves reserved on the lifting frame 2 with the two side arms parallel to the long direction of the support frame 1. A rack 132 arranged along the long direction of the support frame 1 is provided on one of the side arms. A set of motors 133 and driving gears 134 are respectively provided on the support frame 1 corresponding to each telescopic arm 131 on each side as driving components. The motor 133 drives the driving gear 134 to rotate, and through the meshing transmission between the gear and the rack 132 of the telescopic arm 131 on the corresponding side, the telescopic arm 131 is driven to slide along the long direction of the support frame 1. The motor 133 of the driving component is a servo motor.

[0038] The two sets of driving components configured on the lifting frame 2 corresponding to the pair of telescopic arms 131 are located on both sides of the support frame 1 along the width direction.

[0039] The pair of telescopic arms 131 are staggered along the width direction of the lifting frame 2 .

[0040] A telescopic rod 135 is connected between the telescopic assembly 13 and the support frame 1 , and the telescopic rod 135 is telescopic along the length of the support frame 1 .

[0041] The plug-in structure 12 includes a pair of connecting seats 121 that are spaced apart and arranged on the top of the support frame 1, and the pair of connecting seats 121 are respectively provided with plug holes 122; two groups of plug-in components 21 are respectively matched with the pair of connecting seats 121 and are arranged at the bottom of the lifting frame 2, and each group of plug-in components 21 includes a hydraulic cylinder 211, a slider 212, and an insertion rod 213. When the lifting frame 2 is assembled with the support frame 1, each group of plug-in components 21 and the matching connecting seat 121 are connected. The slider 212 is driven by the hydraulic cylinder 211 to slide on the lifting frame 2, driving the insertion rod 213 to extend to be matched and penetrated into the insertion hole 122.

[0042] A pair of connecting seats 121 are symmetrically arranged along the length of the support frame 1, claw-shaped reinforcing ribs 123 are formed on both sides of the width of the support frame 1, and a plug hole 122 is formed in the center along the width and passes through the length; two groups of plug-in components 21 are symmetrically arranged along the length of the lifting frame 2, two hydraulic cylinders 211 are installed at the bottom of the lifting frame 2 through a mounting plate 214, and a slider 212 is slidably sleeved on a guide rod 215 on the lifting frame 2.

[0043] There are four groups of steel cable assemblies.

[0044] When splicing steel box girders, each section of the beam can be hoisted in the following manner.

[0045] First, adjust and assemble the bridge steel box girder hoisting structure:

[0046] According to the distribution of the hoisting holes on the steel box girder to be hoisted, the spacing A between the pair of mounting components on the support frame 1 is adjusted by a pair of telescopic components 13 to adapt to the spacing between the two groups of hoisting holes along the length direction of the beam. The two groups of hoisting holes may be adjacent or non-adjacent. The spacing D between the pair of mounting seats 11 of the mounting components on each side is fixed, which is consistent with the spacing D between the two hoisting holes in each group along the width direction of the beam. The specific adjustment action of the pair of telescopic components 13 is to drive the telescopic arms 131 along the slide slot and along the length direction of the support frame 1 through the meshing transmission between the driving gear 134 and the rack 132. The pair of telescopic arms 131 can be displaced toward each other to shorten the spacing A, or can be displaced away from each other to extend the spacing A. Thus, the adjustment of the support frame 1 is completed.

[0047] On this basis, the support frame 1 and the lifting frame 2 are assembled. The lifting frame 2 is placed in the center of the top of the support frame 1, parallel in the long direction, driven by a pair of hydraulic cylinders 211 of the plug-in assembly 21, guided by the guide rod 215, and driven by the slider 212 to insert the plug rod 213 into the plug hole 122 of the connecting seat 121 to complete the assembly;

[0048] After that, the bridge steel box girder hoisting structure (hereinafter referred to as "hoisting structure") and the steel box girder are assembled:

[0049] Place the hoisting structure on one side of the top of the steel box beam in a form in which the length of the support frame 1 is parallel to the beam length, align a pair of mounting components with the two sets of hoisting holes on the side respectively, one mounting seat 11 corresponds to one hoisting hole, and then use bolts to tighten between the aligned threaded mounting holes 111 and the screw holes one by one to complete the assembly between a single hoisting structure and the steel box beam; assemble multiple sets of hoisting structures and the steel box beam in this way, so that the multiple sets of hoisting structures are symmetrically distributed on the steel box beam along the beam width direction;

[0050] Finally, prepare to hoist the steel box girder:

[0051] The lifting structure is connected to the external lifting equipment through the lifting wire ropes 222 of each group of cable assemblies, and then the lifting is ready.

[0052] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A bridge steel box girder hoisting structure, characterized in that: Multiple lifting holes are reserved at the top of the steel box girder. The multiple lifting holes are grouped in pairs, and multiple groups are symmetrically distributed along the beam width direction and spaced along the beam length direction. The two lifting holes in each group are spaced at an interval D along the beam width direction. Each lifting hole is provided with multiple screw holes; the lifting structure of the bridge steel box girder includes: A support frame for detachable assembly with the steel box girder; a pair of mounting components are symmetrically arranged on both sides at the bottom along the longitudinal direction. Each side mounting component includes a pair of mounting seats aligned along the width direction and distributed at an interval D. Multiple threaded mounting holes are provided on the mounting seats corresponding to the screw hole specifications and distribution forms of each lifting hole. The bottom surface of the mounting seat can be adaptively attached to the top surface of the steel box girder at the lifting hole position. The threaded mounting holes and screw holes aligned at each position between the steel box girder are fastened by bolts. The distance A along the longitudinal direction between the pair of mounting components can be adjusted by the telescopic component carried by the support frame. The distance A is adapted to the distance between two groups of lifting holes along the beam length direction; a plug-in structure is provided at the top of the support frame for detachable assembly with the lifting frame; A lifting frame that can be detachably and centrally assembled at the top of the support frame through the plug-in assembly between the plug-in components it carries. Multiple groups of steel cable components are provided at the top and are centrally symmetrically distributed around the centroid of the entire lifting structure of the bridge steel box girder. Each group of steel cable components includes a guide wheel and a lifting steel wire rope. The guide wheel can rotate around a horizontally arranged wheel axle, and the lifting steel wire rope is wound around the outer circumference of the guide wheel. The two free rope ends are used for external lifting equipment to lift.

2. The bridge steel box girder hoisting structure according to claim 1 is characterized in that: The telescopic component includes a pair of telescopic arms symmetrically arranged along the longitudinal direction and extending on both sides of the support frame. Each telescopic arm on each side is in a "C" - shaped frame structure, with the closed end facing outwards and a pair of the mounting seats set. The open end faces the support frame, and the two side arms parallel to the longitudinal direction of the support frame slide through the reserved sliding grooves on the lifting frame. A rack arranged along the longitudinal direction of the support frame is provided on one of the side arms. A set of motors and driving gears are respectively provided on the support frame corresponding to each telescopic arm on each side as driving components. The motors drive the driving gears to rotate, and through the meshing transmission between the gears and the racks of the telescopic arms on the corresponding sides, the telescopic arms are driven to slide along the longitudinal direction of the support frame.

3. The bridge steel box girder hoisting structure according to claim 2 is characterized in that: The two sets of driving components configured corresponding to the pair of telescopic arms on the lifting frame are located on both sides of the support frame along the width direction.

4. The bridge steel box girder hoisting structure according to claim 2 is characterized in that: The pair of telescopic arms are offset in the width direction of the lifting frame.

5. The bridge steel box girder hoisting structure according to claim 1 or 2 is characterized in that: An expansion rod is connected between the telescopic component and the support frame, and the expansion rod is telescopable along the longitudinal direction of the support frame.

6. The bridge steel box girder hoisting structure according to claim 1 is characterized in that: The plug-in structure includes a pair of connecting seats spaced apart and arranged at the top of the support frame. Plug holes are respectively provided on the pair of connecting seats; two sets of plug-in components are respectively matched with the pair of connecting seats and are arranged at the bottom of the lifting frame. Each set of plug-in components includes a hydraulic cylinder, a slider, and a plug rod. When the lifting frame and the support frame are assembled, for each set of plug-in components and the supporting connecting seats, the hydraulic cylinder drives the slider to slide on the lifting frame, driving the plug rod to extend out and be adaptively inserted into the plug holes.

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