A bridge steel box girder hoisting device and construction method thereof

Abstract

The present application relates to a bridge steel box girder lifting device, which includes a track and a frame slidingly arranged on the track, wherein the track is provided with a fixing member for fixing the track to the steel box girder, the frame is provided with a moving assembly for driving the crane to slide on the track, and the frame is also provided with a lifting assembly for lifting the steel box girder; two support frames are slidingly arranged on the frame in a direction of approaching or moving away from each other, and the frame is respectively provided with a first driving member and a second driving member for driving the two support frames to slide, and both support frames are provided with a support platform for supporting the steel box girder, and both support platforms are provided with a transmission assembly, and the transmission assembly is used to drive the steel box girder to move horizontally and perpendicular to the length direction of the track. The present application has the effect that when the steel box girder is adjusted, it is not easily affected by factors such as strong winds, thereby making the adjustment of the steel box girder more convenient.

Description

Technical Field

[0001] The present application relates to the technical field of bridge construction, and in particular to a bridge steel box girder hoisting device and a construction method thereof. Background Art

[0002] A steel box girder, also known as a steel plate box girder, is a common structural form for long-span bridges. Typically used on bridges with large spans, it is called a steel box girder because of its box-like appearance. A steel box girder is typically constructed by fully welded connections of a top plate, bottom plate, web plate, transverse diaphragms, longitudinal diaphragms, and stiffening ribs. The top plate is an orthotropic bridge deck composed of a cover plate and longitudinal stiffening ribs.

[0003] At present, during the construction and installation of steel box girders of large-span bridges, a segmented lifting method is usually adopted. The steel box girders are first installed on both sides of the bridge, and a crane is installed on the bridge deck of the constructed steel box girder. The beam transport ship transports the steel box girder to the bottom of the steel box girder construction position, and the steel box girder is lifted to the installation position through the lifting device on the crane. The steel box girder is adjusted and then the two adjacent steel box girders are fixed to complete the construction and installation of the steel box girder.

[0004] However, when adjusting the position of the steel box girder, since the steel box girder is in a hoisting state and is affected by factors such as strong winds, the steel box girder is prone to shaking, which makes it very inconvenient to adjust the position of the steel box girder. Summary of the Invention

[0005] In response to the problems existing in the prior art, the present application provides a bridge steel box girder lifting equipment and a construction method thereof, which has the effect of being less susceptible to factors such as strong winds when adjusting the steel box girder, thereby making the adjustment of the steel box girder more convenient.

[0006] In the first aspect, the present application provides a bridge steel box girder hoisting device, which adopts the following technical solution:

[0007] A bridge steel box girder lifting equipment comprises a track and a frame slidingly arranged on the track, the track is provided with a fixing part for fixing the track to the steel box girder, the frame is provided with a moving component for driving the crane to slide on the track, and the frame is also provided with a lifting component for lifting the steel box girder; two support frames are provided on the frame for sliding in a direction approaching or moving away from each other, the frame is respectively provided with a first driving member and a second driving member for driving the two support frames to slide, both of the support frames are provided with a support platform for supporting the steel box girder, and both of the support platforms are provided with a transmission component, and the transmission component is used to drive the steel box girder to move horizontally and perpendicular to the length direction of the track.

[0008] By adopting the above technical solution, when installing the steel box girder, the steel box girder is first installed on both sides of the bridge, the track is installed on the constructed steel box girder deck of the bridge through the fixing parts, and then the frame is installed on the track. The beam transport ship transports the steel box girder to the bottom of the steel box girder construction position, and the steel box girder is lifted to the installation position of the steel box girder through the lifting assembly. Then, the two support frames are driven to slide so that the support platforms on the two support frames are both located below the steel box girder, and the steel box girder is placed on the support platform. The distance between the steel box girder to be installed and the originally installed steel box girder is adjusted by the moving assembly, and the steel box girder is driven to move horizontally on the support platform through the transmission assembly, so that the steel box girder is adjusted. When the steel box girder is adjusted, it is not easily affected by factors such as strong wind, which makes it more convenient to adjust the steel box girder.

[0009] Optionally, a slide groove is provided on both sides of the track along the length direction of the track, a first clamping block is fixedly provided on the frame, a second clamping block is slidably provided on the frame in a direction approaching or moving away from the first clamping block, and sliders are fixedly provided on the ends of the first clamping block and the second clamping block close to each other, and the two sliders are respectively used to be inserted into the slide grooves on both sides of the track, and a limiting component is provided on the frame for preventing the second clamping block from sliding.

[0010] By adopting the above technical solution, the slider on the first clamping block is inserted into the slide groove on one side of the track, and the second clamping block is slid so that the slider on the second clamping block is inserted into the slide groove on the other side of the track, thereby installing the rack on the track.

[0011] Optionally, the limit assembly includes a limit screw and a driving source, the limit screw is rotatably set on the frame, and the axial direction of the limit screw is parallel to the sliding direction of the second clamping block, and a first threaded hole is opened on the second clamping block along the axial direction of the limit screw, the limit screw is passed through the first threaded hole and is threadedly connected to the second clamping block, and the driving source is used to drive the limit screw to rotate.

[0012] By adopting the above technical solution, the limit screw is driven to rotate by the driving source. Since the limit screw is threadedly connected to the second clamping block, the second clamping block can be driven to slide along the axial direction of the limit screw while the limit screw rotates. When the limit screw stops rotating, the second clamping block can be limited.

[0013] Optionally, the moving component includes a gear hob and a first motor, the gear hob is rotatably set on the frame, the first motor is fixedly set on the frame, a first worm is coaxially fixed on the output shaft of the first motor, a first worm wheel is coaxially fixed on the gear hob, the first worm wheel is engaged with the first worm, and the top wall of the track is provided with a tooth groove adapted to the gear hob along the length direction of the track.

[0014] By adopting the above technical solution, the first motor drives the first worm to rotate, the first worm drives the first worm wheel to rotate, and drives the gear hobbing to rotate, thereby driving the gear hobbing to move in the tooth groove of the track. The gear hobbing and the tooth groove on the track make the movement of the frame on the track more stable, and through the arrangement of the first worm wheel and the first worm, the rotation of the gear hobbing can only be driven in one direction by the first motor. When the gear hobbing stops rotating, the frame can be fixed on the track.

[0015] Optionally, a roller is rotatably provided on the slider, and the roller is used for rolling connection with the track.

[0016] By adopting the above technical solution, the friction between the slider and the track is reduced by the roller, thereby preventing the slider or the track from being worn to a certain extent.

[0017] Optionally, the transmission assembly includes a roller and a second motor, the roller is rotatably set on the top wall of the support platform, and the length direction of the roller is parallel to the length direction of the track, the second motor is embedded in the support platform, a second worm gear is coaxially fixed on the roller, and a second worm is coaxially fixed on the output shaft of the second motor, and the second worm gear is engaged with the second worm.

[0018] By adopting the above technical solution, when the steel box girder is placed on the support platform, the steel box girder is located on the roller, and the second motor drives the second worm to rotate, and the second worm drives the second worm wheel to rotate, thereby driving the roller to rotate, so that the steel box girder can be moved on the support platform.

[0019] Optionally, a mounting bracket is slidingly provided on the two support platforms along the axial direction of the second worm gear, and a baffle is slidingly provided on the side of the two mounting brackets close to each other, and the two baffles are respectively used to press against the two sides of the steel box girder, and a limiting member is provided on the mounting bracket for preventing the baffle from sliding; a transmission screw is coaxially fixed on the second worm gear, and a second threaded hole is opened on the mounting bracket along the axial direction of the transmission screw, the transmission screw is passed through the second threaded hole and is threadedly connected to the mounting bracket, and the sliding speed of the mounting bracket is consistent with the sliding speed of the steel box girder on the support platform.

[0020] By adopting the above technical solution, after the steel box girder is placed on the support platform, the baffles on the two mounting frames are slid so that the two baffles are respectively pressed against the two sides of the steel box girder, and the baffles are prevented from sliding by the limiters. When the position of the steel box girder is adjusted on the support platform, the mounting frame moves with the steel box girder and keeps the two baffles always pressed against the side walls of the steel box girder, thereby preventing the steel box girder from being affected by inertia during movement to a certain extent, making it more convenient to adjust the position of the steel box girder.

[0021] Optionally, the support platform is slidably arranged on a support frame along a vertical direction, and a third driving member for driving the support platform to slide is provided on the support frame.

[0022] By adopting the above technical solution, the support platform is driven to slide in the vertical direction by the third driving member, thereby facilitating adjustment of the vertical height of the steel box girder according to different processes and leveling the steel box girder, thereby increasing practicality.

[0023] In a second aspect, the present application provides a construction method for bridge steel box girder hoisting equipment, which adopts the following technical solution:

[0024] A construction method for bridge steel box girder hoisting equipment comprises the following steps:

[0025] S1. When installing the steel box girder, first install the steel box girder on both sides of the bridge, install the track on the constructed steel box girder deck of the bridge through the fixing parts, insert the slider on the first clamping block into the slide groove on one side of the track, drive the limit screw to rotate through the driving source, drive the slider on the second clamping block to insert into the slide groove on the other side of the track, and thus install the rack on the track;

[0026] S2. The beam transport ship transports the steel box girder to the bottom of the steel box girder construction location, and hoists the steel box girder to the installation location of the steel box girder using the lifting assembly, and positions it above the support platforms on the two support frames. Afterwards, the two support frames are driven to slide using the first driving member and the second driving member respectively, so that the support platforms on the two support frames are both located below the steel box girder, and the steel box girder is placed on the rollers of the two support platforms using the lifting assembly;

[0027] S3, driving the support platform to slide in the vertical direction by the third driving member to level the steel box girder;

[0028] S4. After placing the steel box girder on the support platform, slide the baffles on the two mounting frames so that the two baffles are pressed against both sides of the steel box girder, and use the limiters to prevent the baffles from sliding;

[0029] S5. The first motor drives the first worm to rotate, which drives the first worm wheel to rotate, and drives the gear hobbing to rotate, so that the gear hobbing moves in the tooth groove of the track, thereby causing the frame to slide on the track to adjust the distance between the steel box girder to be installed and the previously installed steel box girder;

[0030] S6. The second motor drives the second worm to rotate, and the second worm drives the second worm wheel to rotate, thereby driving the roller to rotate, so that the steel box girder moves horizontally on the support platform, and the steel box girder is adjusted;

[0031] S7. Afterwards, the two steel box girders are fixed, and the two mounting frames are driven away from each other by the first driving member and the second driving member respectively, so that the support platforms on the two support frames are separated from the steel box girders;

[0032] S8. Install and fix the track on the steel box girder that has just been installed, and connect the track installed later with the track installed previously, drive the frame to slide onto the steel box girder that has just been installed, and continue to install and fix the subsequent steel box girders.

[0033] In summary, this application includes at least one of the following beneficial technical effects:

[0034] 1. Use the lifting assembly to lift the steel box girder to the installation location of the steel box girder. Then, drive the two support frames to slide so that the support platforms on the two support frames are both located below the steel box girder. Place the steel box girder on the support platforms. Use the moving assembly to adjust the distance between the steel box girder to be installed and the previously installed steel box girder. Use the transmission assembly to drive the steel box girder to move horizontally on the support platforms to adjust the position of the steel box girder. When the steel box girder is adjusted, it is not easily affected by factors such as strong winds, making it more convenient to adjust the position of the steel box girder.

[0035] 2. After placing the steel box girder on the support platform, slide the baffles on the two mounting frames so that the two baffles are respectively pressed against the two sides of the steel box girder, and use the limiters to prevent the baffles from sliding. When the steel box girder adjusts its position on the support platform, the mounting frames move with the steel box girder and keep the two baffles always close to the side walls of the steel box girder, which to a certain extent prevents the steel box girder from being affected by inertia during movement and makes it more convenient to adjust the position of the steel box girder. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0037] Figure 2 This is a partial structural diagram of an embodiment of the present application, mainly used to express the structural diagram of the hoisting assembly;

[0038] Figure 3 This is a partial structural cross-sectional view of an embodiment of the present application, mainly used to illustrate the connection relationship between the track and the frame;

[0039] Figure 4 yes Figure 3 Enlarged view of section A;

[0040] Figure 5 This is a partial structural cross-sectional view of an embodiment of the present application, mainly used to express a schematic structural diagram of a mobile component;

[0041] Figure 6 It is a schematic diagram of the overall structure of the embodiment of the present application, mainly used to express the structural diagram of the support frame;

[0042] Figure 7 yes Figure 6 Magnified view of part B;

[0043] Figure 8 yes Figure 6 Magnified view of section C.

[0044] Explanation of reference numerals: 1. track; 11. fixing member; 12. slide; 2. frame; 21. fixing frame; 22. first clamping block; 23. second clamping block; 24. slider; 241. roller; 25. first driving member; 26. second driving member; 3. lifting assembly; 31. winding reel; 32. pull rope; 321. sub-line; 322. hook; 33. transmission wheel; 34. servo motor; 4. support frame; 41. support platform; 411. mounting groove; 42. third driving member; 43. mounting frame; 431. Mounting block; 432. Baffle; 4321. Guide rod; 433. Clamping screw; 5. Transmission assembly; 51. Roller; 511. Second worm gear; 52. Second motor; 521. Transmission shaft; 5211. Transmission screw; 522. Second worm; 6. Limiting assembly; 61. Limiting screw; 611. Second gear; 62. Drive motor; 621. First gear; 7. Moving assembly; 71. Gear hobbing; 711. First worm gear; 72. First motor; 721. First worm. DETAILED DESCRIPTION

[0045] The following is combined with Figure 1-8 This application is described in further detail.

[0046] The embodiment of the present application discloses a bridge steel box girder hoisting device. Figure 1 , including a track 1 and a frame 2 slidingly arranged on the track 1, a fixed frame 21 is fixedly arranged on the frame 2, and a hoisting component 3 for lifting the steel box girder is arranged on the fixed frame 21, and two support frames 4 are slidingly arranged on the frame 2 in the direction of approaching or moving away from each other, and support platforms 41 for supporting the steel box girder are slidingly arranged on the two support frames 4 in the vertical direction, and both support platforms 41 are provided with a transmission component 5 for driving the steel box girder to move.

[0047] Reference Figure 1 、 2The lifting assembly 3 includes a winding wheel 31, a pull rope 32, a transmission wheel 33 and a servo motor 34. The winding wheel 31 and the transmission wheel 33 are rotatably arranged on the fixed frame 21. The pull rope 32 is wound on the winding wheel 31, and the pull rope 32 passes around the transmission wheel 33. The pull rope 32 is woven by several steel wires. The pull rope 32 is separated into four sub-lines 321 at one end away from the winding wheel 31, and each sub-line 321 is fixed with a hook 322. The servo motor 34 is fixedly arranged on the fixed frame 21, and the output shaft of the servo motor 34 is coaxially fixedly connected with the winding wheel 31; when the steel box girder is processed, four lifting ears are welded on the top wall of the steel box girder. When the steel box girder is hoisted, the hooks 322 on the four sub-lines 321 are respectively hung on the four lifting ears of the steel box girder, and the servo motor 34 drives the winding wheel 31 to rotate, so that the steel box girder can be hoisted.

[0048] Reference Figure 1 、 3 The track 1 is provided with a fixing part 11 for fixing the track 1 on the steel box girder. The fixing part 11 includes a bolt. The track 1 is provided with a plurality of mounting holes for the bolts to pass through. When the steel box girder is produced and processed, threaded holes are first opened on the top wall of the steel box girder. After the steel box girder is installed, the track 1 is fixed to the top wall of the steel box girder.

[0049] Reference Figure 3 Both sides of the track 1 are provided with slide grooves 12 along the length direction of the track 1, a first clamping block 22 is fixedly provided on the frame 2, and a second clamping block 23 is slidably provided on the frame 2 in the direction approaching or moving away from the first clamping block 22, and sliders 24 are fixedly provided at the ends of the first clamping block 22 and the second clamping block 23 that are close to each other, and the two sliders 24 are respectively used to be inserted into the slide grooves 12 on both sides of the track 1.

[0050] Reference Figure 3 Two tracks 1 are provided, and the length directions of the two tracks 1 are parallel. Two first clamping blocks 22 and two second clamping blocks 23 are provided respectively, and each track 1 corresponds to a first clamping block 22 and a second clamping block 23. The spacing between the two first clamping blocks 22 is equal to the spacing between the two tracks 1 on the steel box girder. Two connecting grooves are provided on the frame 2 along the sliding direction of the second clamping block 23, and the two second clamping blocks 23 are respectively slidably set in the two connecting grooves.

[0051] Reference Figure 3 、 4, a limit assembly 6 is provided on the frame 2 for preventing the two second clamping blocks 23 from sliding, the limit assembly 6 includes a limit screw 61 and a driving source, the limit screw 61 is rotatably set on the frame 2, and the axial direction of the limit screw 61 is parallel to the sliding direction of the two second clamping blocks 23, the two ends of the limit screw 61 extend into the two connecting grooves respectively, and the two second clamping blocks 23 are provided with a first threaded hole along the axial direction of the limit screw 61, the limit screw 61 is passed through the first threaded holes of the two second clamping blocks 23, and are respectively threadedly connected to the two second clamping blocks 23, the driving source includes a driving motor 62, the driving motor 62 is fixedly provided on the frame 2, and a first gear 621 is coaxially fixed on the output shaft of the driving motor 62, and a second gear 611 is coaxially fixed on the limit screw 61, and the first gear 621 is meshed with the second gear 611.

[0052] Reference Figure 3 A plurality of rollers 241 are rotatably provided on the slider 24. The plurality of rollers 241 are distributed along the circumference of the slider 24, and the rotation axes of the rollers 241 are parallel. The rollers 241 are in rolling connection with the track 1. The rollers 241 reduce the friction between the slider 24 and the track 1, thereby preventing the slider 24 or the track 1 from wearing to a certain extent.

[0053] Reference Figure 3 、 5 , a moving assembly 7 for driving the crane to slide on the track 1 is provided on the frame 2, and the moving assembly 7 is provided with two groups, and respectively drives the frame 2 to slide on the two tracks 1, the moving assembly 7 includes a hob 71 and a first motor 72, and a receiving groove is provided on the bottom wall of the frame 2, the hob 71 is rotatably set in the receiving groove, and the axial direction of the hob 71 is parallel to the axial direction of the limit screw 61, the first motor 72 is fixedly provided on the frame 2, and a first worm 721 is coaxially fixed on the output shaft of the first motor 72, and a first worm wheel 711 is coaxially fixed on the hob 71, and the first worm wheel 711 is meshed with the first worm 721 The top wall of the track 1 is provided with a tooth groove adapted to the hobbing gear 71 along the length direction of the track 1; the first motor 72 drives the first worm 721 to rotate, the first worm 721 drives the first worm wheel 711 to rotate, and drives the hobbing gear 71 to rotate, thereby driving the hobbing gear 71 to move in the tooth groove of the track 1, and the movement of the frame 2 on the track 1 is made more stable by the tooth groove of the hobbing gear 71 and the track 1, and by the arrangement of the first worm wheel 711 and the first worm 721, the rotation of the hobbing gear 71 can only be driven in one direction by the first motor 72. When the hobbing gear 71 stops rotating, the frame 2 can be fixed on the track 1.

[0054] Reference Figure 6The frame 2 is respectively provided with a first driving member 25 and a second driving member 26 for driving the two support frames 4 to slide. The first driving member 25 includes a first hydraulic cylinder, and the second driving member 26 includes a second hydraulic cylinder. The first hydraulic cylinder and the second hydraulic cylinder are both fixedly arranged on the frame 2. The piston rod of the first hydraulic cylinder is fixedly connected to one of the support frames 4, and the piston rod of the second hydraulic cylinder is fixedly connected to the other support frame 4.

[0055] Reference Figure 6 A third driving member 42 is provided on the support frame 4 for driving the support platform 41 to slide. The third driving member 42 includes a hydraulic jack. The hydraulic jack is fixedly arranged on the support frame 4. The piston of the hydraulic jack is fixedly connected to the bottom wall of the support platform 41. The support platform 41 is driven to slide in the vertical direction by the hydraulic jack, so as to facilitate the adjustment of the vertical height of the steel box girder according to the steel box girder of different processes and level the steel box girder, thereby increasing practicality.

[0056] Reference Figure 6 、 7 The transmission assembly 5 includes a roller 51 and a second motor 52. A plurality of rollers 51 are provided, and the plurality of rollers 51 are rotatably arranged on the top wall of the support platform 41, and the axial direction of each roller 51 is parallel to the length direction of the track 1. A second worm gear 511 is coaxially fixed on each roller 51. The second motor 52 is embedded in the support platform 41. A transmission shaft 521 is coaxially fixed on the output shaft of the second motor 52. A plurality of second worm gears 522 are coaxially fixed on the transmission shaft 521. A mounting groove 411 is opened on the support platform 41 along the axial direction perpendicular to the roller 51. The transmission shaft 521 is rotatably arranged in the mounting groove 411. The plurality of second worm gears 522 on the transmission shaft 521 are respectively engaged with the second worm gears 511 on the plurality of rollers 51.

[0057] Reference Figure 6 、 8 , a mounting bracket 43 is slidingly provided on both support platforms 41 along the axial direction of the second worm 522, a mounting block 431 is fixedly provided on the mounting bracket 43, the mounting block 431 is slidingly provided in the mounting groove 411, a transmission screw 5211 is coaxially fixedly provided on the transmission shaft 521, a second threaded hole is opened on the mounting block 431 along the axial direction of the transmission screw 5211, the transmission screw 5211 is passed through the second threaded hole and is threadedly connected to the mounting block 431, and the sliding speed of the mounting bracket 43 is consistent with the sliding speed of the steel box girder on the support platform 41.

[0058] Reference Figure 6On the two mounting frames 43, baffles 432 are slidably provided on the side close to each other along the axial direction of the second worm 522, and the axial direction of the transmission screw 5211 is perpendicular to the two baffles 432. The two baffles 432 are respectively used to press against the two sides of the steel box girder. A guide rod 4321 is fixedly provided on the end away from each other of the two baffles 432. The length direction of the guide rod 4321 is perpendicular to the baffle 432. A guide hole is opened on the mounting frame 43 along the length direction of the guide rod 4321, and the guide rod 4321 is slidably passed through the guide hole.

[0059] Reference Figure 6 The fixing member 433 is provided on the mounting bracket 43 to prevent the baffle 432 from sliding. The fixing member includes a tightening screw 433, and a third threaded hole is opened on the mounting bracket 43 in the direction perpendicular to the baffle 432. The tightening screw 433 is passed through the third threaded hole and is threadedly connected to the mounting bracket 43, and the tightening screw 433 is rotatably connected to the baffle 432; after the steel box girder is placed on the support platform 41, the tightening screws 433 on the two mounting brackets 43 are rotated to make the two baffles 432 respectively press against the two sides of the steel box girder. When the steel box girder adjusts its position on the support platform 41, the mounting bracket 43 moves with the steel box girder and makes the two baffles 432 always close to the side walls of the steel box girder, thereby preventing the steel box girder from being affected by inertia during movement to a certain extent; making it more convenient to adjust the position of the steel box girder.

[0060] The implementation principle of the bridge steel box girder lifting equipment of the embodiment of the present application is as follows: when installing the steel box girder, the steel box girder is first installed on both sides of the bridge, and the two rails 1 are installed on the constructed steel box girder deck of the bridge by bolts, and the length directions of the two rails 1 are parallel, and the sliders 24 on the two first clamping blocks 22 are respectively inserted into the slide grooves 12 on one side of the two rails 1, and the limiting screws 61 are driven by the driving motor 62 to rotate so that the sliders 24 on the two second clamping blocks 23 are respectively inserted into the slide grooves 12 on the other side of the two rails 1, thereby installing the frame 2 on the rail 1, and the beam transport ship transports the steel box girder to the bottom of the steel box girder construction position, and the hooks 322 on the four sub-lines 321 are respectively hung on the four lifting ears of the steel box girder, and the servo motor 34 drives the winding wheel 31 to rotate, and the steel box girder is lifted to the installation position of the steel box girder, and is located above the support platform 41 on the two support frames 4.

[0061] The two support frames 4 are driven to slide by the first hydraulic cylinder and the second hydraulic cylinder respectively, so that the support platforms 41 on the two support frames 4 are both located below the steel box girder, and the steel box girder is placed on the rollers 51 of the two support platforms 41. The support platforms 41 are driven to slide in the vertical direction by the hydraulic jack to level the steel box girder, and the two baffles 432 are respectively pressed against the two sides of the steel box girder by rotating the tightening screws 433 on the two mounting frames 43.

[0062] The first motor 72 drives the first worm 721 to rotate, and the first worm 721 drives the first worm wheel 711 to rotate, and drives the gear hobbing 71 to rotate, so that the gear hobbing 71 is driven to move in the tooth groove of the track 1, thereby causing the frame 2 to slide on the track 1, and adjusting the spacing between the steel box girder to be installed and the previously installed steel box girder. The second motor 52 drives the second worm 522 to rotate, and the second worm 522 drives the second worm wheel 511 to rotate, thereby driving the roller 51 to rotate, so that the steel box girder moves horizontally on the support platform 41, and the steel box girder is adjusted. When the steel box girder is adjusted, it is not easily affected by factors such as strong wind, thereby making it more convenient to adjust the steel box girder.

[0063] The present application also discloses a construction method for a bridge steel box girder hoisting device, comprising the following steps:

[0064] S1. When installing the steel box girder, first install the steel box girder on both sides of the bridge, and then install the two tracks 1 on the constructed steel box girder deck of the bridge with bolts, so that the length directions of the two tracks 1 are parallel. The sliders 24 on the two first clamping blocks 22 are respectively inserted into the chute 12 on one side of the two tracks 1. The limit screw 61 is driven by the driving motor 62 to rotate, so that the sliders 24 on the two second clamping blocks 23 are respectively inserted into the chute 12 on the other side of the two tracks 1, thereby installing the frame 2 on the track 1;

[0065] S2. The beam transport ship transports the steel box girder to the bottom of the steel box girder construction position, and hangs the hooks 322 on the four sub-lines 321 on the four lifting ears of the steel box girder respectively. The servo motor 34 drives the winding wheel 31 to rotate, and the steel box girder is lifted to the installation position of the steel box girder and is located above the support platforms 41 on the two support frames 4. Afterwards, the two support frames 4 are driven to slide by the first hydraulic cylinder and the second hydraulic cylinder respectively, so that the support platforms 41 on the two support frames 4 are both located below the steel box girder, and the steel box girder is placed on the rollers 51 of the two support platforms 41;

[0066] S3, driving the support platform 41 to slide in the vertical direction by the hydraulic jack to level the steel box girder;

[0067] S4. After placing the steel box girder on the support platform 41, rotate the tightening screws 433 on the two mounting brackets 43 so that the two baffles 432 are pressed against both sides of the steel box girder respectively;

[0068] S5. The first motor 72 drives the first worm 721 to rotate, and the first worm 721 drives the first worm wheel 711 to rotate, and drives the gear hobbing 71 to rotate, so that the gear hobbing 71 is driven to move in the tooth groove of the track 1, thereby causing the frame 2 to slide on the track 1, and adjusting the distance between the steel box girder to be installed and the previously installed steel box girder;

[0069] S6. The second motor 52 drives the second worm 522 to rotate, and the second worm 522 drives the second worm wheel 511 to rotate, thereby driving the roller 51 to rotate, so that the steel box girder moves horizontally on the support platform 41, and the steel box girder is adjusted;

[0070] S7. Afterwards, the two steel box girders are fixed, and the two mounting frames 43 are driven away from each other by the first driving member 25 and the second driving member 26 respectively, so that the support platforms 41 on the two support frames 4 are separated from the steel box girders;

[0071] S8. Install and fix the track 1 on the newly installed steel box girder, connect the newly installed track 1 with the previously installed track 1, drive the frame 2 to slide onto the newly installed steel box girder, and continue to install and fix the subsequent steel box girders.

[0072] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A bridge steel box girder hoisting device, characterized by: The invention comprises a track (1) and a frame (2) slidably arranged on the track (1); a fixing member (11) for fixing the track (1) on a steel box girder is arranged on the track (1); a moving assembly (7) for driving a crane to slide on the track (1) is arranged on the frame (2); and a hoisting assembly (3) for lifting the steel box girder is also arranged on the frame (2); Two support frames (4) are provided on the frame (2) for sliding in a direction of approaching or moving away from each other. A first driving member (25) and a second driving member (26) for driving the two support frames (4) to slide are respectively provided on the frame (2). A support platform (41) for supporting a steel box beam is provided on each of the two support frames (4). A transmission assembly (5) is provided on each of the two support platforms (41). The transmission assembly (5) is used to drive the steel box beam to move in a horizontal direction and perpendicular to the length direction of the track (1).

2. The bridge steel box girder hoisting equipment according to claim 1, characterized in that: Slide grooves (12) are provided on both sides of the track (1) along the length direction of the track (1); a first clamping block (22) is fixedly provided on the frame (2); a second clamping block (23) is slidably provided on the frame (2) in a direction approaching or moving away from the first clamping block (22); a slider (24) is fixedly provided on one end of the first clamping block (22) and the second clamping block (23) close to each other; the two sliders (24) are respectively used to be inserted into the slide grooves (12) on both sides of the track (1); a limit assembly (6) is provided on the frame (2) for preventing the second clamping block (23) from sliding.

3. The bridge steel box girder hoisting equipment according to claim 2, characterized in that: The limiting assembly (6) includes a limiting screw (61) and a driving source. The limiting screw (61) is rotatably arranged on the frame (2), and the axial direction of the limiting screw (61) is parallel to the sliding direction of the second clamping block (23). A first threaded hole is opened on the second clamping block (23) along the axial direction of the limiting screw (61). The limiting screw (61) is passed through the first threaded hole and is threadedly connected to the second clamping block (23). The driving source is used to drive the limiting screw (61) to rotate.

4. The bridge steel box girder hoisting equipment according to claim 3, characterized in that: The moving assembly (7) comprises a gear hob (71) and a first motor (72); the gear hob (71) is rotatably mounted on the frame (2); the first motor (72) is fixedly mounted on the frame (2); a first worm (721) is coaxially fixedly mounted on the output shaft of the first motor (72); a first worm wheel (711) is coaxially fixedly mounted on the gear hob (71); the first worm wheel (711) is meshed with the first worm (721); and a tooth groove adapted to the gear hob (71) is provided on the top wall of the track (1) along the length direction of the track (1).

5. The bridge steel box girder hoisting equipment according to claim 2, characterized in that: A roller (241) is rotatably provided on the slider (24), and the roller (241) is used for rolling connection with the track (1).

6. The bridge steel box girder hoisting equipment according to claim 4, characterized in that: The transmission assembly (5) comprises a roller (51) and a second motor (52); the roller (51) is rotatably arranged on the top wall of the support platform (41), and the length direction of the roller (51) is parallel to the length direction of the track (1); the second motor (52) is embedded in the support platform (41); a second worm gear (511) is coaxially fixedly arranged on the roller (51); a second worm (522) is coaxially fixedly arranged on the output shaft of the second motor (52); the second worm gear (511) is meshed with the second worm gear (522).

7. The bridge steel box girder hoisting equipment according to claim 6, characterized in that: A mounting frame (43) is slidably provided on each of the two support platforms (41) along the axial direction of the second worm (522); a baffle (432) is slidably provided on each of the two mounting frames (43) on a side close to each other; the two baffles (432) are respectively used to press against two sides of the steel box beam; and a limiting member for preventing the baffle (432) from sliding is provided on the mounting frame (43); A transmission screw (5211) is coaxially fixedly arranged on the second worm (522), and a second threaded hole is opened on the mounting frame (43) along the axial direction of the transmission screw (5211). The transmission screw (5211) is passed through the second threaded hole and is threadedly connected to the mounting frame (43), and the sliding speed of the mounting frame (43) is consistent with the sliding speed of the steel box girder on the support platform (41).

8. The bridge steel box girder hoisting equipment according to claim 7, characterized in that: The support platform (41) is slidably arranged on the support frame (4) in a vertical direction, and the support frame (4) is provided with a third driving member (42) for driving the support platform (41) to slide.

9. The construction method of a bridge steel box girder hoisting equipment according to claim 8, characterized in that: The following steps are involved: S1. When installing the steel box girder, first install the steel box girder on both sides of the bridge, install the track (1) on the constructed steel box girder deck of the bridge through the fixing member (11), insert the slider (24) on the first clamping block (22) into the slide groove (12) on one side of the track (1), drive the limiting screw (61) to rotate through the driving source, drive the slider (24) on the second clamping block (23) to insert into the slide groove (12) on the other side of the track (1), and thus install the frame (2) on the track (1); S2, the beam transport ship transports the steel box beam to the bottom of the steel box beam construction position, and hoists the steel box beam to the installation position of the steel box beam through the hoisting assembly (3), and is located above the support platform (41) on the two support frames (4), and then, the two support frames (4) are driven to slide by the first driving member (25) and the second driving member (26), so that the support platforms (41) on the two support frames (4) are both located below the steel box beam, and the steel box beam is placed on the rollers (51) of the two support platforms (41) through the hoisting assembly (3); S3, driving the support platform (41) to slide in the vertical direction by the third driving member (42) to level the steel box girder; S4, after placing the steel box girder on the support platform (41), slide the baffles (432) on the two mounting frames (43) so that the two baffles (432) respectively press against the two sides of the steel box girder, and prevent the baffles (432) from sliding by using a limiter; S5. The first motor (72) drives the first worm (721) to rotate, and the first worm (721) drives the first worm wheel (711) to rotate, and drives the gear hobbing (71) to rotate, so that the gear hobbing (71) moves in the tooth groove of the track (1), thereby causing the frame (2) to slide on the track (1) to adjust the distance between the steel box girder to be installed and the previously installed steel box girder; S6. The second motor (52) drives the second worm (522) to rotate, and the second worm (522) drives the second worm wheel (511) to rotate, thereby driving the roller (51) to rotate, so that the steel box girder moves horizontally on the support platform (41), and the steel box girder is adjusted; S7. Afterwards, the two steel box girders are fixed, and the two mounting frames (43) are driven away from each other by the first driving member (25) and the second driving member (26), respectively, so that the support platforms (41) on the two support frames (4) are separated from the steel box girders; S8, install and fix the track (1) on the steel box girder that has just been installed, connect the track (1) installed later with the track (1) installed previously, drive the frame (2) to slide onto the steel box girder that has just been installed, and continue to install and fix the subsequent steel box girders.

Images