A bridge erecting machine for bridge construction with a safety protection structure

Abstract

The present invention provides a bridge erection machine for bridge construction with a safety protection structure, which relates to the technical field of bridge erection machines. It includes a driving main frame, an inner wall of the driving main frame is fixed with a sliding track, an inner wall of the sliding track is slidably connected with a moving platform, four cable cranes are installed below the moving platform, and installation mechanisms are arranged at the bottom ends of steel cables of the four cable cranes. The installation mechanism includes a long cylinder, two top plates are hinged inside the long cylinder, a long rod is arranged inside the long cylinder, and an extrusion plate is fixed at the bottom end of the long rod. This bridge erection machine for bridge construction with a safety protection structure has a safety protection structure that facilitates workers to carry out beam body docking operations, and when installing this device with a box girder, it can complete the installation and disassembly of precast box girders conveniently and quickly.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge erecting machines, and specifically to a bridge erecting machine for bridge construction with a safety protection structure. Background Art

[0002] A bridge erecting machine is a device specifically used to place precast beam bodies onto precast bridge piers. It belongs to the category of cranes. Its main function is to lift the beam body and then transport it to a designated position and lower it. Different from a general crane, the working conditions of a bridge erecting machine are more demanding, and it needs to perform longitudinal movement operations on the beam slabs.

[0003] Currently, during the bridge erection project, it is necessary to use a bridge erecting machine to lift and transport a precast bridge to the erection area. Then, the middle support leg and the front support leg on the bridge erecting machine are respectively supported on two adjacent precast bridge piers. Finally, control the precast bridge to fall and place it on the two precast bridge piers. Since when the bridge erecting machine controls the docking and installation of the bridge and the bridge pier, workers need to perform operations such as maintaining the assembled steel bars, detecting during docking, and pouring concrete at the docking position of the bridge and the bridge pier. Therefore, it is necessary to lower the workers to the top surface of the precast bridge pier through a suspension rope and complete the above operations on the top surface of the precast bridge pier. However, when workers perform operations on the top surface of the bridge pier, not only is there no safety protection structure around, which is likely to cause safety accidents, but also the space on the top surface of the precast bridge pier is limited, which is not conducive to workers performing operations.

[0004] On the other hand, the patent document with the publication number CN115057337B discloses a device and method for transporting the front bracket of a bridge erecting machine, which avoids the problems of large pulling load and unstable transportation of the bridge erecting machine when transporting the front bracket. However, it is difficult for the above device to complete the installation and disassembly of the bridge erecting machine and the precast box girder conveniently and quickly. Currently, when the bridge erecting machine lifts the precast box girder, in order to lift it smoothly, generally, a threaded column is installed at the bottom end of the cable of the bridge erecting machine, and the threaded column is inserted into the reserved hole on the upper surface of the box girder. Then, workers need to enter the inside of the box girder, fit the top plate to the inner top wall of the box girder and install it with the threaded column through a threaded part. When lifting, the cable is wound up and the box girder is lifted by the top plate. However, this installation method is relatively cumbersome, not convenient enough, and requires workers to enter and exit the internal space of the box girder multiple times, which poses a safety hazard. Therefore, we propose a bridge erecting machine for bridge construction with a safety protection structure to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to make up for the deficiencies of the prior art and propose a bridge erecting machine for bridge construction with a safety protection structure. This device has a safety protection structure that facilitates workers to perform beam body docking operations. On the other hand, this device can conveniently and quickly complete the installation and disassembly with the precast box girder.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: A bridge erecting machine for bridge construction with a safety protection structure, including a main traveling frame, wherein a sliding track is fixed inside the main traveling frame, a moving platform is slidably connected to the inner wall of the sliding track, four cable cranes are installed below the moving platform, and installation mechanisms are provided at the bottom ends of the steel cables of the four cable cranes. The installation mechanism includes a long cylinder, two ejecting plates are hinged inside the long cylinder, a long rod is arranged inside the long cylinder, an extrusion plate is fixed to the bottom end of the long rod, rollers are rotatably connected to both sides of the extrusion plate, a hinge block is fixed to the top end of the long rod, two hinge rods are hinged to the outer surface of the hinge block, and sliding rods are hinged to the mutually remote ends of the two hinge rods.

[0007] An anti-slip ring plate is sleeved outside the long cylinder, two sliding plates are fixed to the upper surface of the anti-slip ring plate, two support plates I are fixed to the top end of the long cylinder, columns are fixed to the outer surfaces of the two support plates I, anti-slip seats are fixed to the bottom ends of the two columns, and the two sliding plates are respectively slidably connected to the two columns.

[0008] Furthermore, two middle hydraulic supports are installed on the outer surface of the main traveling frame, and two front hydraulic supports are installed on the right side of the main traveling frame.

[0009] By adopting the above technical solutions, when installing a box girder, the main traveling frame is driven to move on the bridge, so that the two front hydraulic supports move above the blank pier, the two front hydraulic supports are controlled to move downward and support on the pier, and at the same time, the two middle hydraulic supports are controlled to move downward and support on the bridge, thereby increasing the stability of the device when erecting the box girder.

[0010] Furthermore, the installation mechanism further includes a fixing plate, two support plates II are fixed to the bottom surface of the fixing plate, the two support plates II are both fixed to the upper surface of the anti-slip ring plate, a support plate III is arranged above the fixing plate, the two support plates II are both fixed to the support plate III, and the bottom end of the steel cable of the cable crane is fixed to the support plate III.

[0011] Furthermore, W-shaped plates are fixed to the top ends of the two support plates I, two limiting rods are fixed to the mutually close sides of the two W-shaped plates, sliding tubes are fixed to both ends of the two sliding rods, and the four sliding tubes are respectively slidably connected to the four limiting rods.

[0012] By adopting the above technical solutions, by setting the W-shaped plate to be W-shaped, it effectively avoids interference between the U-shaped plate I and the W-shaped plate when the U-shaped plate I moves.

[0013] Two U-shaped plates II are fixed to the bottom surface of the above-mentioned fixed plate. A set of L-shaped sliding grooves is provided on the outer surface of each of the two U-shaped plates II. The number of L-shaped sliding grooves in each group is two. The two groups of L-shaped sliding grooves are respectively slidably connected to two sliding rods.

[0014] By adopting the above technical solution, when the U-shaped plate I moves, the U-shaped plate I will first drive the sliding rod to slide horizontally in the L-shaped sliding groove, and then the inclined sliding groove of the U-shaped plate I will squeeze the sliding rod to move vertically upward in the L-shaped sliding groove.

[0015] A bidirectional threaded rod is rotatably connected to the upper surface of the above-mentioned fixed plate. A hexagonal head is fixed to one end of the bidirectional threaded rod. Two symmetrically arranged U-shaped plates I are threadedly connected to the outer surface of the bidirectional threaded rod. A set of inclined sliding grooves is provided on the outer surface of each of the two U-shaped plates I. The number of inclined sliding grooves in each group is two. The two groups of inclined sliding grooves are respectively slidably connected to two sliding rods.

[0016] By adopting the above technical solution, when docking the box girder with this device, move the box girder to the lower part of the mobile platform, and then insert the four long cylinders into the four reserved holes on the upper surface of the box girder respectively. At this time, the anti-slip ring plate will fit the upper surface of the box girder. The staff uses an electric pneumatic wrench and drives the bidirectional threaded rod to rotate through the hexagonal head. The rotation of the bidirectional threaded rod drives the two U-shaped plates I to move away from each other. When the U-shaped plate I moves, it will drive the sliding rod to slide in the L-shaped sliding groove through the inclined sliding groove.

[0017] Furthermore, a fixing ring is fixed to the outer surface of the long cylinder. A shielding cylinder is slidably connected to the outer surface of the long cylinder. A telescopic spring is sleeved on the outer surface of the long cylinder. The two ends of the telescopic spring are respectively fixed to the fixing ring and the shielding cylinder.

[0018] By adopting the above technical solution, when the two top plates flip, they will push and lift the shielding cylinder. After the top plates are no longer squeezed by the pressing plates, the shielding cylinder moves downward under the spring pressure of the telescopic spring. The shielding cylinder will block the bottom end of the long cylinder and shield the two top plates, keeping the two top plates in the long cylinder.

[0019] Two groups of protection mechanisms are arranged outside the traveling main frame. Two L-shaped climbing guardrails are fixed above the traveling main frame. The number of each group of protection mechanisms is two and they are centrosymmetric. The protection mechanism includes a support frame. A hinge plate is hinged to the bottom end of the support frame. A climbing bracket is fixed to the outer surface of the support frame. A safety guardrail is fixed to the outer surface of the hinge plate.

[0020] Furthermore, the protection mechanism further includes a straight track fixed to the main driving frame. A driving platform is slidably connected to the outer surface of the straight track. The driving platform is fixed to the support frame. A cable machine is fixed to the outer surface of the support frame. One end of the steel cable of the cable machine is fixed to the hinge plate. Two pulleys are installed on the outer surface of the support frame. Both of the two pulleys are in transmission connection with the steel cable of the cable machine.

[0021] By adopting the above technical solution, when setting up the safe construction area, control the cable machine to release the steel cable to make the hinge plate flip. Through the setting of the two pulleys, the stability of the steel cable retraction and release of the cable machine is increased. By controlling the driving platform, the support frame can be driven to lift and lower. When it is necessary to fold the support frame and the hinge plate after the box girder is laid, it is necessary to control the driving platform to drive the support frame to move to the bottom end, and then control the hinge plate to flip into the support frame to prevent interference between the hinge plate and the bridge when the hinge plate flips.

[0022] Furthermore, a sleeve is fixed to the bottom end of the support frame. A baffle plate adapted to the hinge plate is slidably connected to the inner wall of the sleeve. A rack is fixed to the upper surface of the baffle plate. A motor is fixed to the outer surface of the sleeve. The output end of the motor is fixed with a gear. The gear meshes with the rack.

[0023] By adopting the above technical solution, when a group of protection mechanisms cooperate to set up a safe area, control the two motors in this group of protection mechanisms to start. At this time, the motors drive the gears to rotate, so that the gears drive the baffle plates to extend through the meshing of the racks. Then control the two cable machines in this group of protection mechanisms to release the steel cables, and the two hinge plates flip. The two hinge plates in this group of protection mechanisms will respectively be placed on the two baffle plates. The baffle plates provide support for the hinge plates and increase the stability of the hinge plates.

[0024] Compared with the prior art, the bridge erection machine for bridge construction with a safety protection structure has the following beneficial effects:

[0025] 1. The present invention is provided with an installation mechanism. When installing the device on the box girder, the long tube is inserted into the reserved hole on the upper surface of the box girder. At this time, the anti-slip ring plate will fit on the upper surface of the box girder. Then, the worker only needs to use an electric pneumatic wrench to drive the bidirectional threaded rod to rotate through the hexagon head. When the U-shaped plate moves, it will drive the sliding rod to slide in the L-shaped chute through the inclined chute. The sliding rod first moves horizontally. At this time, the two jacking plates will flip to be parallel to the inner top wall of the box girder. Then the sliding rod moves vertically upward. At this time, the two jacking plates move upward and approach the inner top wall of the box girder. The two jacking plates cooperate with the anti-slip ring plate to clamp and fix the box girder, completing the installation. With the cable crane and the mobile platform, the box girder can be lifted and transported, making the lifting process of the box girder more convenient and fast. When disassembling, only need to drive the bidirectional threaded rod to rotate in the reverse direction to retract the two jacking plates into the long tube, and then the installation mechanism can be taken out of the box girder. Through this installation and fixing method, the worker only needs to operate on the upper surface of the box girder, avoiding the safety hazards when the worker enters and exits the internal space of the box girder. At the same time, the operation is simple, convenient and fast.

[0026] 2. The present invention is provided with a protection mechanism. Before docking the box girder and the bridge pier, control the two support frames in a group of protection mechanisms to descend to the bottom, control the two baffle plates in a group of protection mechanisms to extend, and then control the two hinge plates in a group of protection mechanisms to flip. The two hinge plates will respectively be placed on the two baffle plates. The safety guardrails on the two hinge plates will cooperate to form a safety area for workers to operate. This safety area facilitates the subsequent work of workers. Workers can enter the safety guardrail through the L-shaped climbing guardrail and the climbing bracket in sequence. And the L-shaped climbing guardrail, the climbing bracket and the safety guardrail are all provided with guardrails, improving the safety of workers during operation.

[0027] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0029] Figure 2 is a three-dimensional structural schematic diagram of the present invention when the box girder is docked with the bridge pier;

[0030] Figure 3 is a three-dimensional structural schematic diagram of the present invention after the two hinge plates are flipped;

[0031] Figure 4 is the present invention Figure 3 is an enlarged schematic diagram of part A in the present invention;

[0032] Figure 5Schematic three-dimensional structure diagram of the protection mechanism in the present invention;

[0033] Figure 6 Schematic three-dimensional structure diagram of the mobile carrier and the cable crane in the present invention;

[0034] Figure 7 Schematic three-dimensional structure diagram of the installation mechanism in the present invention;

[0035] Figure 8 Schematic exploded structure diagram of the installation mechanism in the present invention;

[0036] Figure 9 Schematic split structure diagram of the first U-shaped plate and the sliding rod in the present invention;

[0037] Figure 10 Schematic cross-sectional view of the three-dimensional structure of the long cylinder, fixed ring, telescopic spring and shielding cylinder in the present invention;

[0038] Figure 11 Schematic three-dimensional structure diagram of the initial state of the installation mechanism in the present invention;

[0039] Figure 12 Schematic three-dimensional structure diagram after the two jacking plates are unfolded in the present invention.

[0040] In the figure:

[0041] 1, traveling main frame; 2, sliding track; 3, mobile carrier; 4, L-shaped climbing guardrail;

[0042] 5, protection mechanism; 501, straight track; 502, driving carrier; 503, support frame; 504, climbing bracket; 505, hinge plate; 506, safety guardrail; 507, cable machine; 508, pulley; 509, sleeve; 510, baffle; 511, rack; 512, motor; 513, gear;

[0043] 6, installation mechanism; 601, long cylinder; 602, jacking plate; 603, extrusion plate; 604, roller; 605, long rod; 606, hinge block; 607, hinge rod; 608, sliding rod; 609, sliding tube; 610, first support plate; 611, W-shaped plate; 612, pillar; 613, anti-slip seat; 614, limiting rod; 615, fixed ring; 616, telescopic spring; 617, shielding cylinder; 618, fixing plate; 619, second support plate; 620, third support plate; 621, bidirectional threaded rod; 622, hexagonal head; 623, first U-shaped plate; 624, inclined chute; 625, second U-shaped plate; 626, L-shaped chute; 627, anti-slip ring plate; 628, sliding plate;

[0044] 7, middle hydraulic support; 8, front hydraulic support; 9, cable crane. Detailed implementation manners

[0045] Next, in combination with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0046] Please refer to Figures 1 to 12 , the present invention provides the following implementation scheme: A bridge erecting machine for bridge construction with a safety protection structure, including a driving main frame 1. A sliding track 2 is fixed to the inner wall of the driving main frame 1. A moving platform 3 is slidably connected to the inner wall of the sliding track 2. Two middle hydraulic supports 7 are installed on the outer surface of the driving main frame 1, and two front hydraulic supports 8 are installed on the right side of the driving main frame 1.

[0047] Please pay special attention to Figure 1 and Figure 2 , when installing the box girder, drive the driving main frame 1 to move on the bridge, so that the two front hydraulic supports 8 move above the blank pier, control the two front hydraulic supports 8 to move downward and support on the pier, and at the same time control the two middle hydraulic supports 7 to move downward and support on the bridge to increase the stability of the device when erecting the box girder.

[0048] Please pay special attention to Figure 6 , Figure 7 and Figure 10 , four cable cranes 9 are installed below the moving platform 3. Installation mechanisms 6 are provided at the bottom ends of the steel cables of the four cable cranes 9. The installation mechanism 6 includes a long cylinder 601. Two top plates 602 are hinged to the inner wall of the long cylinder 601. A long rod 605 is arranged inside the long cylinder 601. An extrusion plate 603 is fixed to the bottom end of the long rod 605. Roller 604 is rotatably connected to both sides of the extrusion plate 603. A hinge block 606 is fixed to the top end of the long rod 605. Two hinge rods 607 are hinged to the outer surface of the hinge block 606. Sliding rods 608 are hinged to the ends of the two hinge rods 607 away from each other. When the extrusion plate 603 moves upward, the two rollers 604 on the extrusion plate 603 will respectively squeeze the two top plates 602, causing the two top plates 602 to flip. Through the setting of the rollers 604, the friction force when the extrusion plate 603 squeezes the top plate 602 is reduced.

[0049] Please pay special attention to Figure 7 , Figure 8 and Figure 11, an anti-slip ring plate 627 is sleeved outside the long tube 601. Two sliding plates 628 are fixed on the upper surface of the anti-slip ring plate 627. Two support plates 610 are fixed at the top end of the long tube 601. Pillars 612 are fixed on the outer surfaces of the two support plates 610. Anti-slip seats 613 are fixed at the bottom ends of the two pillars 612. The two sliding plates 628 are respectively slidably connected to the two pillars 612. Anti-slip patterns are provided on the bottom surface of the anti-slip ring plate 627 and the anti-slip seats 613. When the installation mechanism 6 is in the initial state and is installed on the box girder, the long tube 601 is inserted into the reserved hole on the upper surface of the box girder. At this time, the anti-slip ring plate 627 and the two anti-slip seats 613 are both attached to the upper surface of the box girder.

[0050] Please refer specifically to Figure 6 and Figure 8 , the installation mechanism 6 further includes a fixing plate 618. Two support plates 619 are fixed on the bottom surface of the fixing plate 618. The two support plates 619 are both fixed on the upper surface of the anti-slip ring plate 627. A support plate 620 is arranged above the fixing plate 618. The two support plates 619 are both fixed to the support plate 620. The bottom end of the steel cable of the cable crane 9 is fixed to the support plate 620.

[0051] Please refer specifically to Figure 8 , Figure 9 and Figure 10 , W-shaped plates 611 are fixed at the top ends of the two support plates 610. Two limiting rods 614 are fixed on one side of the two W-shaped plates 611 close to each other. Slide tubes 609 are fixed at both ends of the two slide rods 608. The four slide tubes 609 are respectively slidably connected to the four limiting rods 614. By setting the W-shaped plate 611 into a W shape, it effectively avoids interference between the movement of the U-shaped plate 623 and the W-shaped plate 611.

[0052] A bidirectional threaded rod 621 is rotatably connected to the upper surface of the fixing plate 618. A hexagonal head 622 is fixed at one end of the bidirectional threaded rod 621. Two symmetric U-shaped plates 623 are threadedly connected to the outer surface of the bidirectional threaded rod 621. A set of inclined sliding grooves 624 are opened on the outer surfaces of the two U-shaped plates 623. The number of each set of inclined sliding grooves 624 is two. The two sets of inclined sliding grooves 624 are respectively slidably connected to the two slide rods 608.

[0053] When docking the box girder with this device, move the box girder under the mobile carrier 3, and then insert the four long tubes 601 into the four reserved holes on the upper surface of the box girder respectively. At this time, the anti-slip ring plate 627 will be attached to the upper surface of the box girder. The staff uses an electric pneumatic wrench and drives the bidirectional threaded rod 621 to rotate through the hexagonal head 622. The rotation of the bidirectional threaded rod 621 drives the two U-shaped plates 623 to move away from each other. When the U-shaped plates 623 move, they will drive the slide rods 608 to slide in the L-shaped sliding grooves 626 through the inclined sliding grooves 624.

[0054] Please refer particularly to Figure 8 、 Figure 11 and Figure 12 , two U-shaped plates II 625 are fixed to the bottom surface of the fixing plate 618. A set of L-shaped sliding grooves 626 are formed on the outer surfaces of the two U-shaped plates II 625. The number of each set of L-shaped sliding grooves 626 is two. The two sets of L-shaped sliding grooves 626 are respectively slidably connected to the two sliding rods 608.

[0055] When the U-shaped plate I 623 moves, the U-shaped plate I 623 will first drive the sliding rod 608 to horizontally slide in the L-shaped sliding groove 626, and then the inclined sliding groove 624 of the U-shaped plate I 623 will squeeze the sliding rod 608 to vertically move upward in the L-shaped sliding groove 626.

[0056] Please refer particularly to Figure 10 , a fixing ring 615 is fixed to the outer surface of the long barrel 601. A shielding barrel 617 is slidably connected to the outer surface of the long barrel 601. A telescopic spring 616 is sleeved on the outer surface of the long barrel 601. The two ends of the telescopic spring 616 are respectively fixed to the fixing ring 615 and the shielding barrel 617.

[0057] When the two top plates 602 flip, they will push and lift the shielding barrel 617. After the top plates 602 are no longer squeezed by the pressing plate 603, the shielding barrel 617 moves downward under the spring pressure of the telescopic spring 616. The shielding barrel 617 will block the bottom end of the long barrel 601, block the two top plates 602, and keep the two top plates 602 inside the long barrel 601.

[0058] Please refer particularly to Figure 2 、 Figure 3 and Figure 5 , two groups of protection mechanisms 5 are arranged outside the driving main frame 1. Two L-shaped climbing guardrails 4 are fixed above the driving main frame 1. The number of each group of protection mechanisms 5 is two and they are centrosymmetric. The protection mechanism 5 includes a support frame 503. The bottom end of the support frame 503 is hinged with a hinge plate 505. A climbing bracket 504 is fixed to the outer surface of the support frame 503. A safety guardrail 506 is fixed to the outer surface of the hinge plate 505.

[0059] After the two safety guardrails 506 in a group of protection mechanisms 5 cooperate to form a safe construction area, workers can successively enter the safety guardrail 506 through the L-shaped climbing guardrail 4 and the climbing bracket 504. Moreover, guardrails are arranged on the L-shaped climbing guardrail 4, the climbing bracket 504 and the safety guardrail 506, improving the safety of workers during operation.

[0060] Please refer particularly to Figure 3 and Figure 5, the protection mechanism 5 further includes a straight track 501 fixed to the main driving frame 1. A driving platform 502 is slidably connected to the outer surface of the straight track 501. The driving platform 502 is fixed to a support frame 503. A cable machine 507 is fixed to the outer surface of the support frame 503. One end of the steel cable of the cable machine 507 is fixed to a hinge plate 505. Two pulleys 508 are installed on the outer surface of the support frame 503, and both of the two pulleys 508 are drivingly connected to the steel cable of the cable machine 507.

[0061] When setting up a safe construction area, control the cable machine 507 to release the steel cable to make the hinge plate 505 flip. Through the arrangement of the two pulleys 508, the stability of the steel cable retraction and release of the cable machine 507 is increased. By controlling the driving platform 502, the support frame 503 can be driven to lift and lower. When the support frame 503 and the hinge plate 505 need to be folded after the box girder is laid, it is necessary to control the driving platform 502 to drive the support frame 503 to move to the bottom end, and then control the hinge plate 505 to flip into the support frame 503 to prevent interference between the hinge plate 505 and the bridge when the hinge plate 505 flips.

[0062] Please refer specifically to Figure 3 and Figure 4 , a sleeve 509 is fixed to the bottom end of the support frame 503. A baffle 510 adapted to the hinge plate 505 is slidably connected to the inner wall of the sleeve 509. A rack 511 is fixed to the upper surface of the baffle 510. A motor 512 is fixed to the outer surface of the sleeve 509. A gear 513 is fixed to the output end of the motor 512, and the gear 513 meshes with the rack 511.

[0063] When a group of protection mechanisms 5 cooperate to set up a safe area, control the two motors 512 in this group of protection mechanisms 5 to start. At this time, the motors 512 drive the gears 513 to rotate, so that the gears 513 drive the baffle 510 to extend through the meshing of the racks 511. Then control the two cable machines 507 in this group of protection mechanisms 5 to release the steel cables, and the two hinge plates 505 flip. The two hinge plates 505 in this group of protection mechanisms 5 will respectively be placed on the two baffles 510. The baffles 510 provide support for the hinge plates 505 and increase the stability of the hinge plates 505.

[0064] Working principle:

[0065] When installing the box girder, drive the main driving frame 1 to move on the bridge, so that the two front hydraulic supports 8 move above the blank piers. Control the two front hydraulic supports 8 to move downward and support on the piers. At the same time, control the two middle hydraulic supports 7 to move downward and support on the bridge to increase the stability of the device when erecting the box girder.

[0066] When setting up a safe construction area, start the four driving platforms 502 in two sets of protective mechanisms 5 simultaneously, so that the driving platforms 502 drive the support frames 503 to move downward to the bottom of the straight track 501. Then, control the four motors 512 in the two sets of protective mechanisms 5 to start, so that the motors 512 drive the gears 513 to rotate, and the gears 513 drive the baffles 510 to extend through the engagement with the racks 511. Then, control the four cable machines 507 in the two sets of protective mechanisms 5 to release the steel cables, and the four articulated plates 505 are flipped. Among them, the two articulated plates 505 in each set of protective mechanisms 5 will respectively rest on the two baffles 510, and the two safety guardrails 506 in each set of protective mechanisms 5 will cooperate to form a safe construction area for workers to operate. Finally, synchronously control the four driving platforms 502 to rise, so that the two safe construction areas move to the docking area between the bridge pier and the box girder, facilitating subsequent operations for workers.

[0067] When docking the box girder with this device, move the box girder under the moving platform 3, and then insert the four long cylinders 601 into the four reserved holes on the upper surface of the box girder respectively. At this time, the anti-slip ring plate 627 will fit the upper surface of the box girder. The staff uses an electric pneumatic wrench and drives the bidirectional threaded rod 621 to rotate through the hexagonal head 622. The rotation of the bidirectional threaded rod 621 drives the two U-shaped plates one 623 to move away from each other. When the U-shaped plates one 623 move, they will drive the sliding rod 608 to slide in the L-shaped chute 626 through the inclined chute 624.

[0068] The sliding rod 608 first moves horizontally in the L-shaped chute 626. The sliding rod 608 will drive the articulated block 606 to rise through the articulated rod 607. The articulated block 606 drives the pressing plate 603 to rise through the long rod 605. When the pressing plate 603 rises, it will respectively squeeze the two jacking plates 602 through the two rollers 604 to make the two jacking plates 602 flip. When the two jacking plates 602 flip, they will jack and lift the shielding cylinder 617. Finally, the two jacking plates 602 flip to be parallel to the inner top wall of the box girder, and the pressing plate 603 blocks the two jacking plates 602 from flipping back.

[0069] Then the sliding rod 608 moves vertically upward in the L-shaped chute 626. The sliding rod 608 will drive the W-shaped plate 611 to rise through the two limiting rods 614. The W-shaped plate 611 drives the long cylinder 601 and the two jacking plates 602 to rise through the support plate one 610. The two jacking plates 602 move upward close to the inner top wall of the box girder. After that, the two jacking plates 602 will cooperate with the anti-slip ring plate 627 to clamp and fix the box girder, completing the installation. When disassembling, only drive the bidirectional threaded rod 621 to rotate in the reverse direction, so that the two jacking plates 602 retract into the long cylinder 601, and then the installation mechanism 6 can be taken out of the box girder. Through this installation and fixing method, the workers only need to operate on the upper surface of the box girder, avoiding the safety hazards when the workers enter and exit the internal space of the box girder, and at the same time, the operation is simple, convenient and fast.

[0070] When docking the box girder with the pier, synchronously control four cable cranes 9 to lift the clamped box girder, and then control the movement of the mobile carrier 3 to hoist and transport the box girder, move the box girder to the bridge erection area, and then move the box girder downward for docking with the pier.

[0071] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention.

Claims

1. A bridge erecting machine for bridge construction with a safety protection structure, comprising a traveling main frame (1), characterized in that: A sliding track (2) is fixed to the inner wall of the travel main frame (1), a movable platform (3) is slidably connected to the inner wall of the sliding track (2), four cable cranes (9) are installed below the movable platform (3), the bottom ends of the steel cables of the four cable cranes (9) are provided with mounting mechanisms (6), the mounting mechanisms (6) comprising a long cylinder (601), the inner wall of the long cylinder (601) is hinged with two push plates (602), a long rod (605) is arranged inside the long cylinder (601), a squeezing plate (603) is fixed to the bottom end of the long rod (605), a hinge block (606) is fixed to the top end of the long rod (605), the outer surface of the hinge block (606) is hinged with two hinge rods (607), and the ends of the two hinge rods (607) that are away from each other are hinged with sliding rods (608); The outer sleeve of the long tube (601) is provided with an anti-slip ring plate (627), and two support plates (610) are fixed to the top of the long tube (601). The mounting mechanism (6) also includes a fixing plate (618), and two support plates (619) are fixed to the bottom surface of the fixing plate (618), and the two support plates (619) are fixed to the upper surface of the anti-slip ring plate (627); A W-shaped plate (611) is fixed to the top of each of the two support plates (610); two limit rods (614) are fixed to the sides of the two W-shaped plates (611) close to each other; sliding tubes (609) are fixed to both ends of the two sliding rods (608); and the four sliding tubes (609) are slidably connected to the four limit rods (614) respectively; Two U-shaped plates (625) are fixed to the bottom surface of the fixed plate (618), and the outer surfaces of the two U-shaped plates (625) are each provided with a group of L-shaped grooves (626), and each group of L-shaped grooves (626) has two in number, and the two groups of L-shaped grooves (626) are respectively slidably connected to the two slide bars (608); The upper surface of the fixed plate (618) is rotatably connected to a bidirectional threaded rod (621), and the outer surface of the bidirectional threaded rod (621) is threadedly connected to two symmetrical U-shaped plates (623). The outer surfaces of the two U-shaped plates (623) are each provided with a group of inclined grooves (624), and each group of inclined grooves (624) has two inclined grooves. The two groups of inclined grooves (624) are slidably connected to the two slide rods (608) respectively. Two sets of protection mechanisms (5) are arranged outside the traveling main frame (1).

2. The bridge erecting machine with a safety protection structure for bridge construction according to claim 1, characterized in that: Two middle hydraulic supports (7) are installed on the outer surface of the traveling main frame (1), and two front hydraulic supports (8) are installed on the right side of the traveling main frame (1).

3. The bridge erecting machine with a safety protection structure for bridge construction according to claim 1, characterized in that: A support plate three (620) is arranged above the fixing plate (618), the two support plates two (619) are fixed to the support plate three (620), and the bottom end of the steel cable of the cable crane (9) is fixed to the support plate three (620).

4. The bridge erecting machine with a safety protection structure for bridge construction according to claim 1, characterized in that: Rollers (604) are rotatably connected to both sides of the extrusion plate (603); two sliding plates (628) are fixed to the upper surface of the anti-slip ring plate (627); pillars (612) are fixed to the outer surfaces of the two support plates (610); anti-slip seats (613) are fixed to the bottom ends of the two pillars (612); the two sliding plates (628) are respectively slidably connected to the two pillars (612); and a hexagonal head (622) is fixed to one end of the bidirectional threaded rod (621).

5. The bridge erecting machine with a safety protection structure for bridge construction according to claim 1, characterized in that: A fixing ring (615) is fixed to the outer surface of the long tube (601), a shielding tube (617) is slidably connected to the outer surface of the long tube (601), a telescopic spring (616) is sleeved on the outer surface of the long tube (601), and two ends of the telescopic spring (616) are respectively fixed to the fixing ring (615) and the shielding tube (617).

6. The bridge erecting machine with a safety protection structure for bridge construction according to claim 1, characterized in that: Two L-shaped climbing guardrails (4) are fixed above the traveling main frame (1), the number of each group of the protection mechanisms (5) is two and they are centrally symmetrical, the protection mechanisms (5) comprising a support frame (503), a hinged plate (505) being hinged at the bottom end of the support frame (503), a climbing bracket (504) being fixed on the outer surface of the support frame (503), and a safety guardrail (506) being fixed on the outer surface of the hinged plate (505).

7. The bridge erecting machine with a safety protection structure for bridge construction according to claim 1, characterized in that: The protection mechanism (5) further comprises a straight track (501) fixed on the traveling main frame (1); the outer surface of the straight track (501) is slidably connected to a driving platform (502); the driving platform (502) is fixed to a support frame (503); a cable machine (507) is fixed to the outer surface of the support frame (503); one end of a steel cable of the cable machine (507) is fixed to a hinged plate (505); two pulleys (508) are installed on the outer surface of the support frame (503); the two pulleys (508) are both connected to the steel cable of the cable machine (507) in a transmission manner.

8. The bridge erecting machine with a safety protection structure for bridge construction according to claim 6, characterized in that: A sleeve (509) is fixed to the bottom end of the support frame (503); a baffle (510) matching the hinged plate (505) is slidably connected to the inner wall of the sleeve (509); a rack (511) is fixed to the upper surface of the baffle (510); a motor (512) is fixed to the outer surface of the sleeve (509); a gear (513) is fixed to the output end of the motor (512); and the gear (513) is meshed with the rack (511).

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