Multi-point synchronous pushing device for large-hole span steel box girder

Abstract

The utility model belongs to the technical field of bridge construction, and provides a multi-point synchronous pushing device for a large-hole span steel box girder, which comprises a base, pushing components and a driving component, the driving component comprises a rack and rotating components, the rack is arranged on the base along the width direction of the base, the rotating components are arranged on the pushing components, and the driving component is arranged on the base. The rotating assembly comprises a gear, a worm gear and a worm. When the position of the pushing assembly needs to be adjusted, the worm is rotated, the worm rotates to be meshed with the worm gear to drive the worm gear to rotate, the worm gear rotates to drive the gear to rotate, the gear rotates to be meshed with the rack to drive the gear to move, and the gear moves to drive the pushing assembly to move. And the gear can be locked by stopping rotating the worm, so that the pushing assembly is fixed, the pushing position of the pushing assembly is convenient and labor-saving to adjust, the labor intensity of operators is reduced, and the adjusting efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge construction technical field, concretely relates to a big hole span steel box girder multi -point synchronous pushing device. BACKGROUND

[0002] At present, the big hole span steel box girder bridge engineering adopts pushing installation, and it does not need large hoisting equipment to hoist and splice according to the traditional construction technology in the construction operation, solves the problem of difficult construction because the construction environment is located in the mountain valley, across the existing river, mountain and other construction difficulties, effectively solves the problem of narrow site not easy to construction, strong safety feeling, construction quality is easy to guarantee, and is not limited by weather conditions, can be constructed as usual in winter, the construction speed is fast, is favorable for shortening the construction period, guarantees personnel safety, saves construction cost.

[0003] The plurality of pushing assemblies in the multi-point synchronous pushing device in the prior art are mostly fixed through bolts, and when pushing different steel box girders, the pushing assemblies need to be repeatedly assembled and disassembled to adjust the pushing position, but this adjustment method is more troublesome and laborious, increases the labor intensity of the operating workers and reduces the adjustment efficiency. Therefore, in view of the above technical problems, a big hole span steel box girder multi-point synchronous pushing device is proposed. SUMMARY

[0004] In view of the deficiencies in the prior art, the utility model provides a big hole span steel box girder multi-point synchronous pushing device, which is convenient and labor-saving to adjust the pushing position of the pushing assembly, reduces the labor intensity of the operating workers and improves the adjustment efficiency.

[0005] The big hole span steel box girder multi-point synchronous pushing device comprises:

[0006] A base can be installed at the top end of a pier, and a cushion beam is arranged at the top end of the base, and a steel box girder can be placed at the top end of the cushion beam;

[0007] A pushing assembly is arranged at the top end of the base and is slidably arranged in multiple groups along the width direction of the base, and the pushing assembly is used to drive the steel box girder to move vertically and along the length direction of the base;

[0008] A driving assembly comprises a rack and a rotating assembly; the rack is arranged on the base along the width direction of the base, and the rotating assembly is arranged on each of the multiple pushing assemblies; the rotating assembly comprises a gear, a worm gear and a worm; the gear is rotatably arranged on the pushing assembly and is engaged with the rack; the worm gear is coaxially connected with the gear; and the worm is rotatably arranged on the pushing assembly and is engaged with the worm gear.

[0009] The above-mentioned big hole span steel box girder multi-point synchronous pushing device has the following beneficial effects:

[0010] When the position of the pushing assembly needs to be adjusted, the worm is rotated, the worm rotation is engaged with the worm gear to drive the worm gear to rotate, the worm gear rotation drives the gear to rotate, the gear rotation is engaged with the rack to drive the gear to move, the gear movement drives the pushing assembly to move, and since the worm and the worm gear are engaged with self-locking, the gear can be locked by stopping the rotation of the worm, thereby fixing the pushing assembly, conveniently and labor-saving adjusting the pushing position of the pushing assembly, reducing the labor intensity of the operator and improving the adjustment efficiency.

[0011] In one of the embodiments, the pushing assembly comprises a guide frame, a first hydraulic telescopic column, a guide block and a second hydraulic telescopic column; the guide frame is slidably arranged at the top end of the base along the width direction of the base, the gear and the worm are rotatably arranged on the guide frame, the guide block is slidably arranged at the top end of the guide frame along the length direction of the base, the first hydraulic telescopic column is arranged along the length direction of the base and connects the guide frame and the guide block, and the second hydraulic telescopic column is arranged on the guide block along the vertical direction. By controlling the second hydraulic telescopic column to extend and contact with the bottom end of the steel box girder and support the steel box girder to move upward and separate from the cushion beam, and by controlling the first hydraulic telescopic column to extend to drive the guide block and the second hydraulic telescopic column to move along the length direction of the base, the movement of the second hydraulic telescopic column drives the steel box girder to move, when the steel box girder moves to the designated position, the second hydraulic telescopic column is controlled to retract to make the steel box girder move downward and be placed on the top end of the cushion beam and separate from the bottom surface of the steel box girder, and by controlling the first hydraulic telescopic column to retract to drive the guide block and the second hydraulic telescopic column to move reversely and reset, the above steps are cycled to realize the pushing installation of the steel box girder.

[0012] In one of the embodiments, a plurality of T-shaped sliding grooves are formed at the top end of the base, a plurality of T-shaped sliding blocks are arranged at the bottom end of the guide frame, and the plurality of T-shaped sliding blocks are slidably arranged in the plurality of T-shaped sliding grooves along the width direction of the base. The arrangement of the plurality of T-shaped sliding blocks and the plurality of T-shaped sliding grooves can improve the stability of the guide frame sliding along the width direction of the base.

[0013] In one of the embodiments, the pushing assembly further comprises an adjusting assembly, the adjusting assembly comprises a mounting column and a backing plate, the mounting column is arranged at the top end of the second hydraulic telescopic column, a threaded hole is formed at the top end of the mounting column, a threaded column is vertically arranged at the bottom end of the backing plate, and the threaded column is threadedly connected with the threaded hole. By rotating the backing plate to rotate the threaded column, the threaded column is engaged with the threaded hole to drive the threaded column to move to adjust the height of the backing plate, thereby adjusting the distance between the plurality of backing plates and the bottom end of the steel box girder to adapt to the concave or convex part of the bottom end of the steel box girder, ensuring that the plurality of second hydraulic telescopic columns can simultaneously support the bottom end of the steel box girder when the plurality of second hydraulic telescopic columns extend, and improving the stability of supporting the steel box girder.

[0014] In one embodiment, a first rocker wheel is provided at one end of the worm gear. Rotating the first rocker wheel can drive the worm gear to rotate, making it convenient and effortless to drive the worm gear to rotate.

[0015] In one embodiment, a guide assembly is provided on the pad beam. The guide assembly includes mounting rods, guide rollers, and adjusting members. Mounting rods that can slide along the width direction of the base are provided at both ends of the pad beam. Guide rollers that can rotate around a vertical axis are provided on opposite sides of the two sets of mounting rods. The circumferences of the two sets of guide rollers can contact the sides of the steel box girder. Adjusting members are rotatably provided at both ends of the pad beam. The adjusting members are connected to the mounting rods, and rotating the adjusting members can drive the mounting rods to slide. By setting two sets of guide rollers to contact the sides of the steel box girder, the movement of the steel box girder can be guided, improving the stability of the steel box girder during movement. Furthermore, the guide rollers and the steel box girder have rolling contact, reducing friction and wear between them. Simultaneously, rotating the adjusting members can drive the mounting rods to slide, facilitating contact between the two sets of guide rollers and the sides of steel box girders of different sizes, thus improving the practicality of the device.

[0016] In one embodiment, the adjusting component includes a screw; both ends of the pad beam have limit grooves, and the bottom ends of both sets of mounting rods are provided with limit blocks. The limit blocks are slidably disposed within the limit grooves along the width direction of the base. The screw is disposed along the width direction of the base and rotatably disposed within the limit grooves, and is threadedly connected to the limit blocks. By rotating the screw and engaging the threaded connection with the limit blocks, the limit blocks can be driven to move, making it convenient to move the mounting rods. When the screw is stopped, the threaded engagement between the screw and the limit blocks forms a self-locking mechanism, thus fixing the limit blocks and securing the mounting rods. This makes fixing the mounting rods convenient.

[0017] In one embodiment, one end of the screw extends from the pad beam and is provided with a second rocker wheel. Rotating the second rocker wheel drives the screw to rotate, making the screw rotation convenient and effortless. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0019] Figure 1 A three-dimensional structural schematic diagram of a multi-point synchronous jacking device for large-span steel box girders provided in an embodiment of this utility model;

[0020] Figure 2 for Figure 1 An exploded view of the drive assembly in the multi-point synchronous jacking device for large-span steel box girders;

[0021] Figure 3 for Figure 1 An exploded view of the guide components in the multi-point synchronous jacking device for large-span steel box girders.

[0022] Figure label:

[0023] 10. Base; 101. Pad beam; 102. T-shaped slide groove; 103. Limiting groove;

[0024] 20. Guide frame; 201. First hydraulic telescopic column; 202. Guide block; 203. Second hydraulic telescopic column; 204. T-shaped slider; 205. Mounting column; 2051. Threaded hole; 206. Pad; 2061. Threaded column;

[0025] 30. Rack; 301. Gear; 302. Worm gear; 303. Worm; 304. First rocker wheel;

[0026] 40. Mounting rod; 401. Guide roller; 402. Screw; 403. Limiting block; 404. Second rocker wheel. Detailed Implementation

[0027] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0028] Please see Figure 1 and Figure 2 One embodiment of the large-span steel box girder multi-point synchronous jacking device includes a base 10, a jacking assembly, and a drive assembly.

[0029] The base 10 can be installed on the top of the pier, and a support beam 101 is provided on the top of the base 10, on which the steel box girder can be placed. Multiple sets of jacking components are provided on the top of the base 10 and slide along the width of the base 10. These jacking components drive the steel box girder to move vertically and along the length of the base 10. The drive assembly includes a rack 30 and a rotating assembly. The rack 30 is provided on the base 10 along its width. Each of the multiple jacking components has a rotating assembly, which includes a gear 301, a worm gear 302, and a worm 303. The gear 301 is rotatably mounted on the jacking assembly and meshes with the rack 30. The worm gear 302 is coaxially connected to the gear 301, and the worm 303 is rotatably mounted on the jacking assembly and meshes with the worm gear 302.

[0030] In the above embodiments, when it is necessary to adjust the position of the jacking assembly, the worm 303 is rotated, which meshes with the worm wheel 302, driving the worm wheel 302 to rotate. The rotation of the worm wheel 302 drives the gear 301 to rotate, and the rotation of the gear 301 meshes with the rack 30, thus driving the gear 301 to move. The movement of the gear 301 drives the jacking assembly to move. Since the meshing of the worm 303 and the worm wheel 302 has a self-locking property, the gear 301 can be locked by stopping the rotation of the worm 303, thereby fixing the jacking assembly. Adjusting the jacking position of the jacking assembly is convenient and labor-saving, reducing the labor intensity of the operator and improving the adjustment efficiency.

[0031] Based on the above embodiment, a first rocker wheel 304 is further provided at one end of the worm gear 303. By rotating the first rocker wheel 304, the worm gear 303 can be driven to rotate, making it convenient and labor-saving to drive the worm gear 303 to rotate.

[0032] Please see Figure 1 and Figure 2 In one embodiment, the jacking assembly includes a guide frame 20, a first hydraulic telescopic column 201, a guide block 202, and a second hydraulic telescopic column 203. The guide frame 20 is slidably disposed at the top of the base 10 along the width direction. The gear 301 and the worm gear 303 are rotatably disposed on the guide frame 20. The guide block 202 is slidably disposed at the top of the guide frame 20 along the length direction of the base 10. The first hydraulic telescopic column 201 is disposed along the length direction of the base 10 and connects the guide frame 20 and the guide block 202. The second hydraulic telescopic column 203 is disposed on the guide block 202 in a vertical direction.

[0033] In the above embodiment, by controlling the extension of the second hydraulic telescopic column 203 to contact the bottom end of the steel box girder and support the steel box girder to move upward and separate from the pad beam 101, the extension of the first hydraulic telescopic column 201 is controlled to drive the guide block 202 and the second hydraulic telescopic column 203 to move along the length direction of the base 10. The movement of the second hydraulic telescopic column 203 can drive the steel box girder to move. When the steel box girder moves to the designated position, the retraction of the second hydraulic telescopic column 203 is controlled to move the steel box girder downward and place it on the top of the pad beam 101, separating it from the bottom surface of the steel box girder. The retraction of the first hydraulic telescopic column 201 is controlled to drive the guide block 202 and the second hydraulic telescopic column 203 to move in the opposite direction and reset. By repeating the above steps, the jacking installation of the steel box girder can be achieved.

[0034] Based on the above embodiments, the base 10 further includes multiple sets of T-shaped grooves 102 at its top and multiple sets of T-shaped sliders 204 at its bottom. These T-shaped sliders 204 are slidably disposed within the multiple sets of T-shaped grooves 102 along the width direction of the base 10. By providing multiple sets of T-shaped sliders 204 and multiple sets of T-shaped grooves 102, the stability of the guide frame 20 sliding along the width direction of the base 10 can be improved.

[0035] Please see Figure 1 and Figure 2 In one embodiment, the jacking assembly further includes an adjustment assembly, which includes a mounting column 205 and a pad 206. The mounting column 205 is located at the top of the second hydraulic telescopic column 203, and a threaded hole 2051 is provided at the top of the mounting column 205. A threaded column 2061 is vertically provided at the bottom of the pad 206, and the threaded column 2061 can be threadedly connected to the threaded hole 2051.

[0036] In the above embodiment, rotating the pad 206 causes the threaded post 2061 to rotate. The rotation of the threaded post 2061 engages with the threaded hole 2051, which drives the threaded post 2061 to move and adjust the height of the pad 206. This adjusts the distance between the multiple sets of pads 206 and the bottom of the steel box girder to fit the concave or convex part of the bottom of the steel box girder. This ensures that the extension of the multiple sets of second hydraulic telescopic posts 203 allows the multiple sets of pads 206 to simultaneously support the bottom of the steel box girder, thereby improving the stability of the supported steel box girder.

[0037] Please see Figure 1 and Figure 3 In one embodiment, a guide assembly is provided on the pad beam 101. The guide assembly includes mounting rods 40, guide rollers 401, and adjusting members. Mounting rods 40 that can slide along the width direction of the base 10 are provided at both ends of the pad beam 101. Guide rollers 401 that can rotate around a vertical axis are provided on opposite sides of the two sets of mounting rods 40. The periphery of the two sets of guide rollers 401 can contact the two sides of the steel box beam. Adjusting members are provided at both ends of the pad beam 101. The adjusting members are connected to the mounting rods 40. Rotating the adjusting members can drive the mounting rods 40 to slide.

[0038] In the above embodiments, by setting two sets of guide rollers 401 to contact both sides of the steel box girder, the movement of the steel box girder can be guided, improving the stability of the steel box girder during movement. Furthermore, the guide rollers 401 and the steel box girder are in rolling contact, reducing the friction and wear between the guide rollers 401 and the steel box girder. At the same time, the mounting rod 40 can be driven to slide by rotating the adjusting component, thereby facilitating the contact of the two sets of guide rollers 401 with both sides of steel box girders of different sizes, making it easier to guide steel box girders of different sizes and improving the practicality of the device.

[0039] Based on the above embodiments, the adjusting component further includes a screw 402; both ends of the pad beam 101 are provided with limit grooves 103, and the bottom ends of both sets of mounting rods 40 are provided with limit blocks 403. The limit blocks 403 can slide in the limit grooves 103 along the width direction of the base 10. The screw 402 is set along the width direction of the base 10 and is rotatably set in the limit grooves 103, and is threadedly connected to the limit blocks 403. By rotating the screw 402 and the limit blocks 403 in thread engagement, the limit blocks 403 can be driven to move the mounting rods 40. Driving the mounting rods 40 is convenient. When the screw 402 is stopped, the screw 402 and the limit blocks 403 form a self-locking mechanism to fix the limit blocks 403, thereby fixing the mounting rods 40. Fixing the mounting rods 40 is convenient.

[0040] Based on the above embodiment, one end of the screw 402 extends out of the pad beam 101 and is provided with a second rocker wheel 404. By rotating the second rocker wheel 404, the screw 402 can be driven to rotate, making it convenient and labor-saving to drive the screw 402 to rotate.

[0041] The specific implementation method of the above-mentioned multi-point synchronous jacking device for large-span steel box girders is as follows:

[0042] When the position of the jacking assembly needs to be adjusted, the first rocker wheel 304 is rotated to drive the worm 303 to rotate. The rotation of the worm 303 meshes with the worm wheel 302, driving the worm wheel 302 to rotate. The rotation of the worm wheel 302 drives the gear 301 to rotate. The rotation of the gear 301 meshes with the rack 30, driving the gear 301 to move. The movement of the gear 301 drives the jacking assembly to move. When the jacking assembly moves to the designated position, the rotation of the first rocker wheel 304 is stopped, causing the worm 303 to stop rotating. At this time, because the meshing of the worm 303 and the worm wheel 302 has a self-locking property, the worm 303 stops rotating, locking the gear 301, thereby fixing the jacking assembly. Adjusting the jacking position of the jacking assembly is convenient and labor-saving, reducing the labor intensity of the operator and improving the adjustment efficiency.

[0043] Then, by controlling the extension of the second hydraulic telescopic column 203 to contact the bottom end of the steel box girder and support the steel box girder to move upward and separate from the pad beam 101, the extension of the first hydraulic telescopic column 201 is controlled to drive the guide block 202 and the second hydraulic telescopic column 203 to move along the length direction of the base 10. The movement of the second hydraulic telescopic column 203 can drive the steel box girder to move. When the steel box girder moves to the designated position, the retraction of the second hydraulic telescopic column 203 is controlled to move the steel box girder downward and place it on the top of the pad beam 101, separating it from the bottom surface of the steel box girder. The retraction of the first hydraulic telescopic column 201 is controlled to drive the guide block 202 and the second hydraulic telescopic column 203 to move in the opposite direction and reset. By repeating the above steps, the jacking installation of the steel box girder can be achieved.

[0044] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A multi-point synchronous pushing device for large-hole span steel box girder, characterized in that, The utility model relates to a steel box girder erection device, including: The base (10) can be installed at the top of the pier, and the top of the base (10) is provided with a cushion beam (101), and the steel box girder can be placed on the top of the cushion beam (101); The pushing assembly is arranged on the top of the base (10) and is slidably arranged in the width direction of the base (10), and the pushing assembly is used to drive the steel box girder to move in the vertical direction and in the length direction of the base (10); The driving assembly includes a rack (30) and a rotating assembly; the rack (30) is arranged on the base (10) in the width direction of the base (10), and the rotating assembly is arranged on each of the plurality of pushing assemblies; the rotating assembly includes a gear (301), a worm wheel (302) and a worm (303); the gear (301) is rotatably arranged on the pushing assembly and is engaged with the rack (30); the worm wheel (302) is coaxially connected with the gear (301); and the worm (303) is rotatably arranged on the pushing assembly and is engaged with the worm wheel (302).

2. The multi-point synchronous launching device for the large-pore span steel box girder according to claim 1, characterized in that, The pushing assembly includes a guide frame (20), a first hydraulic telescopic column (201), a guide block (202) and a second hydraulic telescopic column (203); the guide frame (20) is slidably arranged on the top of the base (10) in the width direction of the base (10); the gear (301) and the worm (303) are rotatably arranged on the guide frame (20); the guide block (202) is slidably arranged on the top of the guide frame (20) in the length direction of the base (10); the first hydraulic telescopic column (201) is arranged in the length direction of the base (10) and connects the guide frame (20) and the guide block (202); and the second hydraulic telescopic column (203) is arranged on the guide block (202) in the vertical direction.

3. The multi-point synchronous launching device for the large-pore span steel box girder according to claim 2, characterized in that, A plurality of T-shaped sliding grooves (102) are formed on the top of the base (10); a plurality of T-shaped sliding blocks (204) are arranged on the bottom of the guide frame (20); and the plurality of T-shaped sliding blocks (204) are slidably arranged in the plurality of T-shaped sliding grooves (102) in the width direction of the base (10).

4. The multi-point synchronous launching device for the large-pore span steel box girder according to claim 2, characterized in that, The pushing assembly further includes an adjusting assembly; the adjusting assembly includes a mounting column (205) and a backing plate (206); the mounting column (205) is arranged on the top of the second hydraulic telescopic column (203); a threaded hole (2051) is formed on the top of the mounting column (205); a threaded column (2061) is vertically arranged on the bottom of the backing plate (206); and the threaded column (2061) is threadedly connected with the threaded hole (2051).

5. The multi-point synchronous launching device for the large-pore span steel box girder according to claim 1, characterized in that, One end of the worm (303) is provided with a first hand wheel (304).

6. The multi-point synchronous launching device for the large-pore span steel box girder according to claim 1, characterized in that, The cushion beam (101) is provided with a guide assembly, the guide assembly comprises a mounting rod (40), a guide roller (401) and an adjusting piece, the mounting rod (40) capable of sliding along the width direction of the base (10) is arranged at both ends of the cushion beam (101), the opposite sides of the two groups of mounting rods (40) are provided with the guide rollers (401) capable of rotating around the vertical shaft, the circumferential sides of the two groups of guide rollers (401) can contact the two sides of the steel box girder, the adjusting pieces capable of rotating are arranged at both ends of the cushion beam (101), the adjusting pieces are connected with the mounting rods (40), and rotating the adjusting pieces can drive the mounting rods (40) to slide.

7. The multi-point synchronous launching device for the large-pore span steel box girder according to claim 6, characterized in that, The adjusting piece comprises a screw rod (402); the limiting grooves (103) are arranged at both ends of the cushion beam (101), the limiting blocks (403) are arranged at the bottom ends of the two groups of mounting rods (40), the limiting blocks (403) are slidably arranged in the limiting grooves (103) along the width direction of the base (10), the screw rod (402) is arranged along the width direction of the base (10) and rotatably arranged in the limiting groove (103) and threadedly connected with the limiting block (403).

8. The multi-point synchronous launching device for the large-pore span steel box girder according to claim 7, characterized in that, One end of the screw rod (402) extends out of the cushion beam (101) and is provided with a second hand wheel (404).

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