Bridge floor hoisting device and method

Abstract

The invention relates to the technical field of lifting equipment, and particularly discloses a bridge floor lifting device and method.The lifting device comprises a rack, a lifting mechanism, a steel wire rope and a lifting appliance, and the lifting mechanism, the steel wire rope and the lifting appliance are arranged on the rack; the lifting mechanism comprises a driving assembly, a first winding drum assembly, a second winding drum assembly, a braking assembly, a limiting assembly and a damping assembly. The first winding drum assembly comprises two first winding drums, and the driving assembly drives the two first winding drums to rotate synchronously. The second winding drum assembly comprises two second winding drums. The two ends of the steel wire rope are wound around the first winding drum and the second winding drums at the same time. The first winding drum assembly and the second winding drum assembly are connected through the limiting assembly. The second winding drum assembly is connected with the damping assembly. And the braking assembly is connected with the two first winding drums at the same time, the braking assembly is used for triggering the limiting assembly to work when the two first winding drums rotate asynchronously, and the safety in the bridge section hoisting process is improved through the hoisting device and method.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting equipment, and particularly relates to a bridge deck hoisting device and method. Background Art

[0002] During the process of bridge construction, it is usually necessary to use a hoisting device to hoist and transport precast bridge segments. During the process of hoisting the hanging beam segment, affected by the self-weight of the bridge, the hoisting equipment is in a high-load operation state for a long time, and there may be a risk of failure. Some complex operating environments will also affect the stability of the hoisting equipment. When the hoisting equipment fails, the hoisting operation will be interrupted. The bridge segment may fall due to the failure of the hoisting equipment during the hoisting process, and damage the installed bridge structure or other equipment, posing a great potential safety hazard.

[0003] The patent application document with the publication number of CN119750423A discloses a safety lifting mechanism with synchronized drums, including two driving devices, two drums, a speed reduction mechanism, a synchronous gearbox assembly, a fault detection device, and a safety braking assembly. The two driving devices are connected to one side of the two drums through the speed reduction mechanism for driving. The synchronous gearbox assembly is respectively connected to the other side of the two drums for synchronous rotation of the two drums. The fault detection device is arranged inside the synchronous gearbox assembly for detecting the load torque inside the synchronous gearbox assembly. The safety braking assembly is respectively arranged on the two drums for decelerating and braking the drums. This lifting mechanism detects the load torque inside the synchronous gearbox assembly through the fault detection device, and triggers a warning signal when an abnormal load torque is detected. The safety braking assembly is quickly started to decelerate or brake the drums, preventing the hoisted item from falling due to equipment failure.

[0004] When hoisting a bridge segment by a hoisting device, if the hoisting device fails during the hoisting process, only by means of emergency braking to prevent the hoisted item from falling due to equipment failure, there are still certain potential safety hazards. Especially for a bridge segment with a large weight, during emergency braking, the hoisted bridge segment will generate a large impact force due to inertia, which may cause damage to the sling, wire rope or other connecting components. The bridge segment may also swing in mid-air under the action of the impact force, increasing the risk of collision with surrounding structures. Summary of the Invention

[0005] The present invention provides a bridge deck hoisting device and method, aiming to solve the problem that when hoisting a bridge by a hoisting device in the related technology, when the hoisting device fails, the bridge is blocked from falling by means of emergency braking, and there are great potential safety hazards when the bridge is suspended in mid-air.

[0006] The bridge deck hoisting device of the present invention comprises a frame and a lifting mechanism, a steel wire rope and a sling arranged on the frame. The lifting mechanism lifts the bridge section through the steel wire rope and the sling. The device is characterized in that the lifting mechanism comprises a driving assembly, a drum assembly 1, a drum assembly 2, a braking assembly, a limit assembly and a damping assembly; the drum assembly 1 comprises two drums 1, and the driving assembly drives the two drums 1 to rotate synchronously respectively; the drum assembly 2 comprises two drums 2, and the two ends of the steel wire rope are simultaneously wound around the drum 1 and the drum 2. ; The reel assembly 1 and the reel assembly 2 are connected through the limit assembly, and the limit assembly limits the reel assembly 1 and the reel assembly 2 from working at the same time; the brake assembly is connected to the two reels 1 at the same time, and the brake assembly cooperates with the limit assembly. The brake assembly is used to trigger the limit assembly to work when the two reels 1 rotate asynchronously, and switch the working states of the reel assembly 1 and the reel assembly 2; the damping assembly is connected to the reel assembly 2 and is used to increase the resistance of the reel 2 when it rotates.

[0007] The beneficial effects are as follows: the safety of lifting the bridge section by the lifting device is improved, the lifting mechanism is provided with a drum assembly 1 and a drum assembly 2, the drum assembly 1 cooperates with the driving assembly for normally lifting the bridge section, and after the lifting operation of the drum assembly 1 fails, the braking assembly cooperates with the limit assembly to brake the drum assembly 1 and limit the rotation of the drum 1 to prevent the lifted bridge section from falling, and at the same time release the restriction on the drum 2, so that after the drum assembly 1 fails, the bridge section can be lowered through the drum assembly 2, and the damping assembly is used to increase the resistance of the drum 2 during rotation, so as to realize the slow and stable lowering of the bridge section. When the lifting mechanism drive fails, the lifting device of this scheme effectively avoids the safety hazard caused by the suspended bridge section, thereby improving the safety of bridge construction.

[0008] Preferably, the brake assembly includes a connecting shaft 1 and a connecting shaft 2, one end of the connecting shaft 1 is fixedly connected to one of the reels 1, the other end of the connecting shaft 1 is provided with a cylindrical connecting portion, a plurality of slots are evenly arranged in the circumference of the connecting portion, one end of the connecting shaft 2 is fixedly connected to the other reel 1, the other end of the connecting shaft 2 is evenly elastically connected with a plurality of blocks in the circumference, the connecting shaft 2 is rotatably matched with the connecting portion, and each of the blocks is movable relative to each of the slots.

[0009] Preferably, a workbench is provided on the frame, the lifting mechanism is arranged on the workbench, there are two groups of limit assemblies, the two groups of limit assemblies are respectively connected to the connecting shaft one and the connecting shaft two, the limit assembly comprises a connecting piece, a limit piece and an insertion rod, the connecting piece is fixed on the workbench, the limit piece slides with the connecting piece in the vertical direction, the limit piece is elastically connected to the workbench, a plurality of teeth portions one are uniformly provided on the circumferential sides of the connecting shaft one and the connecting shaft two, a tooth portion two is provided on the upper end of the limit piece, the tooth portion one is opposite to the tooth portion two in the vertical direction, the insertion rod is movably connected to the limit piece, and the insertion rod is separated from the limit piece when the clamping block is opposite to the clamping slot.

[0010] The beneficial effects are: the strength of the limit assembly locking the drum 1 is improved, the tooth portion 2 on the limit piece is movably connected with the tooth portion 1 on the connecting shaft 1 or the connecting shaft 2, and after a failure occurs in the lifting of the bridge section, the limit piece can quickly contact with the tooth portion 1 under the action of elasticity after the insertion rod is separated from the limit piece, and the rotation of the connecting shaft 1 and the connecting shaft 2 is limited through the meshing action of the tooth portion 1 and the tooth portion 2, thereby preventing the bridge section from falling.

[0011] Preferably, the two reels 2 are connected by a rotating shaft, tooth portions 3 are fixed at both ends of the rotating shaft, a connecting tube is fixed on the workbench, a movable block is elastically slidably connected in the connecting tube in the vertical direction, a tooth portion 4 is provided at the upper end of the movable block for movably abutting against the tooth portion 3, a movable rod is fixed to the insert rod, and the movable rod is movably abutted against the lower end of the movable block.

[0012] The beneficial effects are: improving the sensitivity of the coordination between the reel assembly two and the reel assembly one, the insertion rod abuts against the movable block through the movable rod, so that when the insertion rod is separated from the limit piece, the movable rod is driven to separate from the movable rod, and the movable block is separated from the tooth part four under the elastic action, so as to lock the reel one and release the restriction on the reel two at the same time, reduce the impact force caused by inertia during emergency braking of the bridge section, and further reduce the shaking of the bridge section.

[0013] Preferably, the damping assembly includes an adjusting chamber, an oil chamber, a winding rope and a movable plate, one end of the winding rope is fixed to the rotating shaft, and the other end of the winding rope is fixed to the movable plate, a partition is provided between the adjusting chamber and the oil chamber, a liquid inlet hole is provided on the partition, and the movable plate slides against the side wall of the adjusting chamber.

[0014] The beneficial effects are: improving the stability of the lowering of the bridge section by the drum assembly 2, and driving the movable plate to move upward in the adjustment cavity through the winding rope when the shaft rotates. The cavity between the partition and the movable plate is in a relatively negative pressure state. The negative pressure further blocks the upward movement of the movable plate, thereby achieving the purpose of limiting the rotation speed of the shaft and the drum 2, and realizing the stable lowering of the bridge section.

[0015] Preferably, there are multiple winding ropes, and the winding ropes are arranged at intervals along the axial direction of the connecting shaft.

[0016] Preferably, a movable member is slidably connected to the connecting shaft I along its axial direction. The movable member is connected to the clamping block through a connecting rod. An abutting portion extends on the inserting rod, and the movable member abuts against the abutting portion.

[0017] Preferably, the two inserting rods overlap in their length directions. Tooth portions five are provided on the overlapping ends of the two inserting rods. A gear is rotatably provided on the workbench, and the two tooth portions five are simultaneously engaged with the gear.

[0018] The beneficial effects are as follows: The strength of locking the two winding drums I is further improved. Under the meshing action of the gear, the two inserting rods can slide synchronously and in opposite directions, so that while one inserting rod disengages from the limiting member, the other inserting rod is driven to disengage from the limiting member, and the two limiting members are simultaneously locked to the connecting shaft I and the connecting shaft II.

[0019] Preferably, the driving assembly includes two driving sources, and the two driving sources are respectively connected to the two winding drums I.

[0020] The bridge deck hoisting method of the bridge deck hoisting device provided by the present invention includes the following steps: S1. Preliminary preparation: formulate a hoisting plan according to the bridge design drawings and technical requirements, and conduct a comprehensive inspection of the hoisting device; S2. Preparation of precast components: precast bridge sections in a factory or a special area on site, and mark the hoisting point positions on the bridge sections according to the design plan; S3. Installation of the lifting appliance: move the hoisting device to the designated position, and correctly install the lifting appliance according to the hoisting point positions on the bridge sections; S4. Hoisting and moving: slowly lift the bridge section off the ground, keep it rising smoothly to the predetermined height, and move the bridge section to the target position; S5. Fixing and connecting: complete the connection work between the bridge sections according to the design requirements.

[0021] The beneficial effects are as follows: the safety of lifting the bridge section by the lifting device is improved, the lifting mechanism is provided with a drum assembly 1 and a drum assembly 2, the drum assembly 1 cooperates with the driving assembly for normally lifting the bridge section, and after the lifting operation of the drum assembly 1 fails, the braking assembly cooperates with the limit assembly to brake the drum assembly 1 and limit the rotation of the drum 1 to prevent the lifted bridge section from falling, and at the same time release the restriction on the drum 2, so that after the drum assembly 1 fails, the bridge section can be lowered through the drum assembly 2, and the damping assembly is used to increase the resistance of the drum 2 during rotation, so as to realize the slow and stable lowering of the bridge section. When the lifting mechanism drive fails, the lifting device of this scheme effectively avoids the safety hazard caused by the suspended bridge section, thereby improving the safety of bridge construction.

[0022] The beneficial effects of the present invention are: (1) To improve the safety of lifting bridge sections by hoisting equipment, the lifting mechanism is provided with a drum assembly 1 and a drum assembly 2. The drum assembly 1 cooperates with the driving assembly to normally lift the bridge section. When the lifting operation of the drum assembly 1 fails, the braking assembly cooperates with the limit assembly to brake the drum assembly 1 and limit the rotation of the drum 1 to prevent the lifted bridge section from falling. At the same time, the restriction on the drum 2 is released so that the bridge section can be lowered through the drum assembly 2 after the drum assembly 1 fails. The damping assembly is used to increase the resistance of the drum 2 during rotation to achieve slow and stable lowering of the bridge section. When the lifting mechanism drive fails, the lifting device of this scheme effectively avoids the safety hazards caused by the suspended bridge section, thereby improving the safety of bridge construction.

[0023] (2) The sensitivity of the coordination between the reel assembly 2 and the reel assembly 1 is improved. The plug rod is in contact with the movable block through the movable rod, so that when the plug rod is separated from the limit piece, the movable rod is driven to separate from the movable rod. The movable block is separated from the tooth portion 4 under the action of elasticity, so as to lock the reel 1 and release the restriction on the reel 2 at the same time, thereby reducing the impact force caused by inertia during emergency braking of the bridge section and further reducing the shaking of the bridge section. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a left view of the hoisting device in the present invention.

[0025] Figure 2 It is a top view of the hoisting device in the present invention.

[0026] Figure 3 It is a schematic structural diagram of the connection between the connecting shaft 1 and the connecting shaft 2 in the present invention.

[0027] Figure 4 It is a structural schematic diagram of the connection between the movable part, the connecting rod and the clamping block in the present invention.

[0028] Figure 5It is a schematic structural diagram of the limit component in the present invention.

[0029] Figure 6 It is a schematic structural diagram of the connection between the rotating shaft and the damping component in the present invention.

[0030] Figure 7 It is a schematic structural diagram of the connection between the connecting cylinder, the movable block and the movable rod in the present invention.

[0031] Reference numerals: 1, frame; 11, workbench; 12, driving source; 13, steel wire rope; 14, sling; 2, first reel; 21, first connecting shaft; 211, connecting part; 22, second connecting shaft; 221, clamping block; 23, movable part; 24, connecting rod; 3, second reel; 31, rotating shaft; 311, third tooth part; 312, winding rope; 32, adjusting cavity; 33, movable plate; 34, oil cavity; 4, inserting rod; 41, connecting piece; 42, limiting piece; 43, movable rod; 44, connecting cylinder; 45, movable block; 46, abutting part; 47, gear; 5, bridge section. Detailed implementation manners

[0032] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as a limitation of the present invention.

[0033] As Figure 1 and Figure 2 shown, the bridge deck hoisting device of the present invention includes a frame 1 and a hoisting mechanism, a steel wire rope 13 and a sling 14 provided on the frame 1. The hoisting mechanism hoists the bridge section 5 through the steel wire rope 13 and the sling 14. A workbench 11 is provided on the frame 1, and the hoisting mechanism is installed on the workbench 11. The hoisting mechanism includes a driving component, a first reel assembly, a second reel assembly, a braking component, a limiting component and a damping component. The first reel assembly includes two first reels 2, and the driving component drives the two first reels 2 to rotate synchronously; the second reel assembly includes two second reels 3, and both ends of the steel wire rope 13 are wound around the first reel 2 and the second reel 3 at the same time, and the sling 14 is slidably matched with the steel wire rope 13; the two second reels 3 are connected to the damping component, and the damping component is used to increase the resistance when the two second reels 3 rotate and limit the rotation speed of the second reels 3.

[0034] The first drum assembly and the second drum assembly are connected by a limit assembly. The limit assembly restricts the simultaneous operation of the first drum assembly and the second drum assembly. That is, when the two first drums 2 rotate normally to lift the bridge section 5, the limit assembly restricts the rotation of the two second drums 3. When a fault occurs in the rotation of the first drum 2, the limit assembly restricts the rotation of the first drum 2 and releases the limit on the second drum 3. The second drum 3 slowly lowers the hoisted bridge section 5 under the action of the damping assembly. The braking assembly is linked and cooperated with the limit assembly. The braking assembly is connected to the two first drums 2 at the same time. The braking assembly is used to activate the limit assembly when the two first drums 2 rotate out of sync, and switch the working states of the first drum assembly and the second drum assembly through the limit assembly.

[0035] As Figure 3 and Figure 4 shown, the braking assembly includes a first connecting shaft 21 and a second connecting shaft 22. The first connecting shaft 21, the second connecting shaft 22 and the two first drums 2 are all coaxially arranged. One end of the first connecting shaft 21 is fixedly connected to a first drum 2. The other end of the first connecting shaft 21 is provided with a cylindrical connecting portion 211. A plurality of card slots are evenly arranged in the circumferential direction inside the connecting portion 211. One end of the second connecting shaft 22 is fixedly connected to another first drum 2. The other end of the second connecting shaft 22 extends into the connecting portion 211. A plurality of locking blocks 221 are evenly arranged in the circumferential direction at one end of the second connecting shaft 22 inside the connecting portion 211. Each locking block 221 is slidably and elastically connected to the second connecting shaft 22 along the radial direction of the second connecting shaft 22. Specifically, the locking block 221 can be connected to the second connecting shaft 22 through a spring. The second connecting shaft 22 is rotationally matched with the connecting portion 211. Each locking block 221 is movably opposite to each card slot. When the locking block 221 is opposite to the card slot, the locking block 221 extends into the card slot under the elastic force of the spring, and restricts the relative rotation of the first connecting shaft 21 and the second connecting shaft 22.

[0036] The driving assembly includes two driving sources 12. The driving source 12 can be a motor. An installation plate is fixed on the workbench 11. The driving source 12 is installed on the installation plate. The driving ends of the two driving sources 12 are respectively connected to the two first drums 2. The two driving sources 12 work synchronously and drive the two first drums 2 to rotate synchronously. When the driving assembly is working normally, the locking blocks 221 on the second connecting shaft 22 are in a misaligned state with the card slots in the connecting portion 211. When the first connecting shaft 21 and the second connecting shaft 22 rotate synchronously with the two drums, the locking blocks 221 are not opposite to the card slots. When any one of the driving sources 12 fails, the two first drums 2 no longer rotate synchronously. The first connecting shaft 21 and the second connecting shaft 22 rotate relatively. When the locking block 221 is opposite to the card slot, the locking block 221 extends into the card slot, and the first connecting shaft 21 and the second connecting shaft 22 are relatively fixed.

[0037] As Figures 3 to 7As shown in the figure, the limit component is linked and cooperated with the braking component. The limit component is used to further lock the first reel 2 after the failure of the first reel 2, prevent the first reel 2 from rotating, and prevent the lifted bridge section 5 from suddenly falling. The limit component includes a connecting piece 41, a limiting piece 42 and a plug rod 4. The connecting piece 41 is fixed on the workbench 11. The connecting piece 41 can be in the shape of a straight cylinder. The limiting piece 42 is slidably matched with the connecting piece 41 in the vertical direction inside the connecting piece 41. The lower end of the limiting piece 42 is connected to the workbench 11 through a spring. A plurality of first tooth parts are evenly arranged on the circumferential side of the first connecting shaft 21. A second tooth part is fixed at the upper end of the limiting piece 42. The first tooth part and the second tooth part are opposite in the vertical direction. A plugging groove is arranged on the limiting piece 42. The plug rod 4 is movably plugged into the plugging groove. When the plug rod 4 is inserted into the plugging groove, the limiting piece 42 presses the spring, and the second tooth part at the upper end of the limiting piece 42 does not contact the first tooth part. When the plug rod 4 disengages from the plugging groove, the limiting piece 42 moves upward under the elastic force of the spring, and the first tooth part and the second tooth part contact and mesh, and the limiting piece 42 blocks the rotation of the first connecting shaft 21.

[0038] When the clamping block 221 is inserted into the clamping groove, the plug rod 4 is separated from the limiting piece 42. Specifically, a movable part 23 is slidably connected to the first connecting shaft 21 along its axial direction. The movable part 23 is connected to the clamping block 221 through a connecting rod 24. One end of the connecting rod 24 is hinged to the clamping block 221, and the other end of the connecting rod 24 is hinged to the movable part 23. An abutting part 46 extends on the plug rod 4, and the movable part 23 is attached to the abutting part 46. When the clamping block 221 faces the clamping groove, the clamping block 221 slides radially along the second connecting shaft 22 under the elastic force, and pulls the movable part 23 to slide through the connecting rod 24. The movable part 23 slides along the direction close to the second connecting shaft 22 and pushes the plug rod 4 to slide in the same direction, so that the plug rod 4 is separated from the limiting piece 42, and the limiting effect on the limiting piece 42 is released. The limiting piece 42 moves upward under the elastic action, and the second tooth part meshes with the first tooth part to block the rotation of the first connecting shaft 21. The second connecting shaft 22 and the first connecting shaft 21 are synchronously locked under the cooperation of the clamping block 221 and the clamping groove.

[0039] To further improve the locking stability of the second connecting shaft 22, two sets of limit components can be provided. The two sets of limit components are respectively used to lock the first connecting shaft 21 and the second connecting shaft 22. The two plug rods 4 of the two sets of limit components are overlapped in their length directions. Tooth parts five are arranged on the overlapping ends of the two plug rods 4. A gear 47 is rotatably arranged on the workbench 11. The two tooth parts five are simultaneously meshed with the gear 47. When the movable part 23 pushes one plug rod 4 to slide, under the meshing action of the gear 47 and the tooth part five, the other plug rod 4 slides synchronously in the opposite direction, so that the plug rods 4 of the two sets of limit components are simultaneously released from the limit on the limiting piece 42.

[0040] Two winding drums II 3 are connected by a rotating shaft 31. A tooth part III 311 is fixed at each end of the rotating shaft 31. A connecting cylinder 44 is fixed on the workbench 11. An active block 45 is slidably connected in the connecting cylinder 44 in the vertical direction. The active block 45 is elastically connected to the connecting cylinder 44 through a spring. A tooth part IV that is movably abutted against the tooth part III 311 is provided at the upper end of the active block 45. A movable rod 43 is fixed to the inserting rod 4. When the hoisting mechanism works normally, the movable rod 43 is movably abutted against the lower end of the active block 45. The spring connecting the active block 45 is in a compressed and energy-storing state. The tooth part IV at the upper end of the active block 45 is engaged with the tooth part III 311 on the rotating shaft 31, and the rotation of the rotating shaft 31 is restricted.

[0041] When a failure occurs in the winding drum assembly I at the same time, the inserting rod 4 drives the movable rod 43 to slide, so that the movable rod 43 is separated from the active block 45. The active block 45 moves downward under the action of the elastic force. The tooth part IV is separated from the tooth part III 311, and the restriction on the rotation state of the rotating shaft 31 is released. That is, after the winding drum assembly I fails and is locked, the winding drum assembly II is released from the limit and slowly rotates under the action of the damping assembly, and the bridge section 5 is stably lowered.

[0042] The damping assembly includes an adjusting cavity 32, an oil chamber 34, a winding rope 312, and an active plate 33. One end of the winding rope 312 is fixed to the rotating shaft 31, and the other end of the winding rope 312 is fixed to the active plate 33. A partition is provided between the adjusting cavity 32 and the oil chamber 34. A liquid inlet hole is provided on the partition. The active plate 33 slides in contact with the side wall of the adjusting cavity 32. There are multiple winding ropes 312, and the winding ropes 312 are arranged at intervals along the axial direction of the connecting shaft. When the bridge section 5 drives the two winding drums II 3 to rotate through the steel wire rope 13, the rotating shaft 31 rotates synchronously with the winding drum II 3, and the winding rope 312 is wound. The winding rope 312 pulls the active plate 33 to move upward in contact with the adjusting cavity 32. The space between the active plate 33 and the partition increases and forms a negative pressure state. The oil in the oil chamber 34 slowly enters the adjusting cavity 32 through the liquid inlet. The negative pressure state between the active plate 33 and the partition restricts the upward movement speed of the active plate 33, and further restricts the rotation speed of the rotating shaft 31 and the winding drum II 3. When the winding drum II 3 slowly rotates, the bridge section 5 is stably lowered.

[0043] A bridge deck hoisting method, the specific steps are as follows: S1. Preliminary preparation, formulate a hoisting plan according to the bridge design drawings and technical requirements, including hoisting sequence, hoisting point positions, equipment and personnel arrangements used, etc., and conduct a comprehensive inspection of the hoisting device provided by the present invention; S2. Prefabricated component preparation, prefabricate the bridge section 5 in a factory or a special area on site, ensure accurate dimensions and a flat surface, and mark the hoisting point positions on the bridge section 5 according to the design plan; S3. Install the lifting appliance 14, move the hoisting device to the designated position, and correctly install the lifting appliance 14 according to the hoisting point positions on the bridge section 5; S4. Lifting and moving: Slowly lift the bridge section 5 off the ground, keep rising smoothly to the predetermined height, and move the bridge section 5 towards the target position. S5. Fixing and connecting: Complete the connection work between the bridge sections 5 according to the design requirements to ensure structural stability. After the hoisting task is completed, remove the hoisting equipment and related auxiliary tools according to the procedures.

[0044] The bridge deck hoisting device and method provided by the present invention switch the working states of the first drum assembly and the drum assembly through the braking assembly and the limiting assembly, so as to brake the first drum assembly in time when a failure occurs in the lifting operation of the first drum assembly, and lock the two drums of the first drum assembly through the limiting assembly to prevent the lifted bridge section from falling. At the same time, the restriction of the second drum assembly is released, and the bridge section is slowly lowered to avoid the safety hazards caused by the suspension of the bridge section after the hoisting device fails, and improve the safety of bridge construction.

[0045] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A bridge deck hoisting device, comprising a frame (1), a hoisting mechanism, a steel wire rope (13) and a spreader (14) arranged on the frame (1), wherein the hoisting mechanism hoists a bridge section (5) through the steel wire rope (13) and the spreader (14), and is characterized in that, The hoisting mechanism includes a driving component, a first drum assembly, a second drum assembly, a braking component, a limiting component, and a damping component; the first drum assembly includes two drums one (2), and the driving component drives the two drums one (2) to rotate synchronously; the second drum assembly includes two drums two (3), and both ends of the wire rope (13) are wound around the drum one (2) and the drum two (3) at the same time; the first drum assembly and the second drum assembly are connected by the limiting component, and the limiting component restricts the first drum assembly and the second drum assembly from working simultaneously; the braking component is connected to the two drums one (2) at the same time, the braking component cooperates with the limiting component, and the braking component is used to trigger the limiting component to work when the two drums one (2) rotate out of sync, and switch the working states of the first drum assembly and the second drum assembly; the damping component is connected to the second drum assembly and is used to increase the resistance when the drum two (3) rotates.

2. The bridge deck hoisting device according to claim 1, wherein, The braking component includes a connecting shaft one (21) and a connecting shaft two (22), one end of the connecting shaft one (21) is fixedly connected to one of the drums one (2), the other end of the connecting shaft one (21) is provided with a cylindrical connecting portion (211), and a plurality of card slots are evenly arranged in the circumferential direction inside the connecting portion (211), one end of the connecting shaft two (22) is fixedly connected to the other drum one (2), and a plurality of clamping blocks (221) are elastically connected to the other end of the connecting shaft two (22) in the circumferential direction, the connecting shaft two (22) is rotationally matched with the connecting portion (211), and each clamping block (221) is movably opposite to each card slot.

3. The bridge deck hoisting device according to claim 2, characterized in that, A workbench (11) is provided on the frame (1), the hoisting mechanism is arranged on the workbench (11), there are two groups of limiting components, and the two groups of limiting components are respectively connected to the connecting shaft one (21) and the connecting shaft two (22), the limiting component includes a connecting piece (41), a limiting piece (42) and a plug rod (4), the connecting piece (41) is fixed on the workbench (11), the limiting piece (42) is slidably matched with the connecting piece (41) in the vertical direction, the limiting piece (42) is elastically connected to the workbench (11), a plurality of first tooth portions are evenly arranged in the circumferential direction on the circumferences of the connecting shaft one (21) and the connecting shaft two (22), a second tooth portion is provided at the upper end of the limiting piece (42), the first tooth portion and the second tooth portion are opposite in the vertical direction, the plug rod (4) is movably inserted into the limiting piece (42), and the plug rod (4) is separated from the limiting piece (42) when the clamping block (221) is opposite to the card slot.

4. The bridge deck hoisting device according to claim 3, characterized in that The two winding drums II (3) are connected by a rotating shaft (31). Tooth parts III (311) are fixed at both ends of the rotating shaft (31). A connecting cylinder (44) is fixed on the workbench (11). An active block (45) is elastically and slidably connected in the connecting cylinder (44) in the vertical direction. A tooth part IV that is movably abutted against the tooth part III (311) is arranged at the upper end of the active block (45). An active rod (43) is fixed to the insertion rod (4). The active rod (43) is movably abutted against the lower end of the active block (45).

5. The bridge deck hoisting device according to claim 4, wherein, The damping assembly includes an adjustment cavity (32), a hydraulic fluid cavity (34), a winding rope (312), and an active plate (33). One end of the winding rope (312) is fixed to the rotating shaft (31), and the other end of the winding rope (312) is fixed to the active plate (33). A partition is arranged between the adjustment cavity (32) and the hydraulic fluid cavity (34). A liquid inlet hole is arranged on the partition. The active plate (33) slides in a manner of fitting the side wall of the adjustment cavity (32).

6. The bridge deck hoisting device according to claim 5, characterized in that, There are multiple winding ropes (312), and the winding ropes (312) are arranged at intervals along the axial direction of the connecting shaft.

7. The bridge deck hoisting device according to claim 3, characterized in that, An active part (23) is slidably connected to the first connecting shaft (21) along its axial direction. The active part (23) is connected to the clamping block (221) through a connecting rod (24). An abutting part (46) extends from the insertion rod (4). The active part (23) is in contact with the abutting part (46).

8. The bridge deck hoisting device according to claim 7, wherein, The two insertion rods (4) are overlapped in their length directions. Tooth parts V are arranged at the overlapping ends of the two insertion rods (4). A gear (47) is rotatably arranged on the workbench (11). The two tooth parts V are simultaneously engaged with the gear (47).

9. The bridge deck hoisting device according to claim 1, characterized in that, The driving assembly includes two driving sources (12), and the two driving sources (12) are respectively connected to the two winding drums I (2).

10. The bridge deck hoisting method using the bridge deck hoisting device according to any one of claims 1-9, characterized in that, It includes the following steps: S1. Preliminary preparation: formulate a hoisting plan according to the bridge design drawings and technical requirements, and conduct a comprehensive inspection of the hoisting device; S2. Preparation of precast components: precast bridge sections (5) in a factory or a dedicated area on site, and mark the hoisting point positions on the bridge sections (5) according to the design plan; S3. Install the lifting appliance (14): move the hoisting device to the designated position, and correctly install the lifting appliance (14) according to the hoisting point positions on the bridge section (5); S4. Hoisting and moving: slowly lift the bridge section (5) off the ground, keep it rising smoothly to the predetermined height, and move the bridge section (5) to the target position; S5. Fixing and connecting: complete the connection work between the bridge sections (5) according to the design requirements.

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