Bridge construction bridge girder erection machine with safety protection structure

Abstract

The invention provides a bridge construction bridge girder erection machine with a safety protection structure, and relates to the technical field of bridge girder erection machines, the bridge girder erection machine comprises a driving main frame, a sliding rail is fixed on the inner wall of the driving main frame, the inner wall of the sliding rail is slidably connected with a movable carrying platform, four cable cranes are installed below the movable carrying platform, and the cable cranes are connected with the safety protection structure. And mounting mechanisms are arranged at the bottom ends of the four cable crane steel cables correspondingly, each mounting mechanism comprises a long cylinder, two jacking plates are hinged to the inner wall of each long cylinder, a long rod is arranged in each long cylinder, and an extrusion plate is fixed to the bottom end of each long rod. According to the bridge girder erection machine with the safety protection structure for bridge construction, the bridge girder erection machine is provided with the safety protection structure which is convenient for workers to carry out beam body butt joint operation, and when the bridge girder erection machine is mounted on a box girder, the bridge girder erection machine and the prefabricated box girder can be conveniently and quickly mounted and dismounted.

Description

Technical Field

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

[0002] A bridge-erecting machine is a device specially used to place prefabricated beams on prefabricated bridge piers. It belongs to the category of cranes. Its main function is to lift the beams, transport them to the designated location and then lower them. Unlike cranes in the general sense, the working conditions of bridge-erecting machines are more stringent and require longitudinal movement operations on the beams.

[0003] At present, when carrying out bridge construction projects, it is necessary to lift the prefabricated bridge by a bridge erecting machine and transport it to the erection area. Then, the middle leg and the front leg of the bridge erecting machine are supported on two adjacent prefabricated piers respectively. Finally, the prefabricated bridge is controlled to fall and placed on the two prefabricated piers. Since when the bridge erecting machine controls the bridge and the pier to dock and install, workers are required to perform operations such as assembling steel bars, inspection during docking, and pouring concrete at the docking point between the bridge and the pier, so workers need to be lowered to the top surface of the prefabricated pier by a lifting rope to complete the above operations on the top surface of the prefabricated pier. However, when workers are working on the top surface of the pier, not only is there no safety protection structure around, which may easily cause safety accidents, but the limited space on the top surface of the prefabricated pier is not conducive to workers' operations.

[0004] On the other hand, the patent document with the announcement number CN115057337B discloses a device and method for reversing the bracket in front of the pier of a bridge erector, which avoids the problem of heavy pulling load and unstable transportation of the bridge erector during the transportation of the bracket in front of the pier. However, it is difficult for the above device to complete the installation and disassembly of the bridge erector and the prefabricated box girder conveniently and quickly. At present, when the bridge erector lifts the prefabricated box girder, in order to ensure stable lifting, a threaded column is generally installed at the bottom end of the cable of the bridge erector, and the threaded column is inserted into the reserved hole on the upper surface of the box girder. Then the worker needs to enter the interior of the box girder, fit the top plate to the top wall of the box girder and install it with the threaded column through the threaded parts. When lifting, the cable is reeled in and the box girder is lifted through the top plate. However, this installation method is relatively cumbersome and not convenient enough, and requires workers to enter and exit the internal space of the box girder many times, which poses a safety hazard. Therefore, we propose a bridge erector with a safety protection structure for bridge construction to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to make up for the shortcomings of the prior art and propose a bridge construction machine with a safety protection structure. The device has a safety protection structure that is convenient for workers to carry out beam docking operations. On the other hand, the device can easily and quickly complete the installation and disassembly of prefabricated box beams.

[0006] In order to solve the above-mentioned technical problems, the present invention provides the following technical solutions: a bridge-building machine with a safety protection structure for bridge construction, comprising a traveling main frame, a sliding track is fixed to the inner wall of the traveling main frame, a moving platform is slidably connected to the inner wall of the sliding track, four cable cranes are installed below the moving platform, the bottom ends of the four cable crane steel cables are provided with mounting mechanisms, the mounting mechanism comprises a long cylinder, two jacking plates are hingedly connected to the inner wall of 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 hingedly connected to the outer surface of the hinge block, and the ends of the two hinge rods away from each other are hinged with sliding rods.

[0007] The outer sleeve of the long tube is provided with an anti-slip ring plate, and two sliding plates are fixed on the upper surface of the anti-slip ring plate. Two supporting plates are fixed on the top of the long tube. Pillars are fixed on the outer surfaces of the two supporting plates. Anti-slip seats are fixed at the bottom ends of the two pillars. The two sliding plates are slidably connected to the two pillars respectively.

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

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

[0010] Furthermore, the mounting mechanism also includes a fixing plate, two supporting plates 2 are fixed to the bottom surface of the fixing plate, the two supporting plates 2 are fixed to the upper surface of the anti-slip ring plate, a supporting plate 3 is arranged above the fixing plate, the two supporting plates 2 are fixed to the supporting plate 3, and the bottom end of the cable crane steel cable is fixed to the supporting plate 3.

[0011] Furthermore, a W-shaped plate is fixed to the top of each of the two support plates, two limit rods are fixed to the sides of the two W-shaped plates close to each other, sliding tubes are fixed to both ends of the two sliding rods, and the four sliding tubes are slidably connected to the four limit rods respectively.

[0012] By adopting the above technical solution, the W-shaped plate is arranged in a W shape, which effectively avoids interference between the U-shaped plate and the W-shaped plate when the U-shaped plate moves.

[0013] Two U-shaped plates 2 are fixed to the bottom surface of the fixed plate. The outer surfaces of the two U-shaped plates 2 are each provided with a group of L-shaped grooves. Each group of L-shaped grooves has two L-shaped grooves. The two groups of L-shaped grooves are slidably connected to the two slide rods respectively.

[0014] By adopting the above technical solution, when the U-shaped plate 1 moves, the U-shaped plate 1 will first drive the slide bar to slide horizontally in the L-shaped slide groove, and then the inclined slide groove of the U-shaped plate 1 will squeeze the slide bar to move vertically upward in the L-shaped slide groove.

[0015] The upper surface of the fixed plate is rotatably connected with a bidirectional threaded rod, one end of which is fixed with a hexagonal head, and the outer surface of the bidirectional threaded rod is threadedly connected with two symmetrical U-shaped plates one, and the outer surfaces of the two U-shaped plates one are each provided with a group of inclined grooves, and the number of inclined grooves in each group is two, and the two groups of inclined grooves are respectively slidably connected with the two sliding rods.

[0016] By adopting the above technical solution, when the box girder is docked with the device, the box girder is moved to the bottom of the movable platform, and then the four long tubes are respectively inserted into the four reserved holes on the upper surface of the box girder. At this time, the anti-slip ring plate will fit the upper surface of the box girder, and the staff uses an electric pneumatic gun 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 to move away from each other. When the U-shaped plate moves, it will drive the slide rod to slide in the L-shaped slide groove through the inclined slide groove.

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

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

[0019] Two groups of protection mechanisms are arranged on the outside of the traveling main frame, and two L-shaped climbing guardrails are fixed on the top of the traveling main frame. The number of protection mechanisms in each group is two and they are centrally symmetrical. The protection mechanism includes a support frame, a hinged plate is hinged at the bottom end of the support frame, a climbing bracket is fixed on the outer surface of the support frame, and a safety guardrail is fixed on the outer surface of the hinged plate.

[0020] Furthermore, the protection mechanism also includes a straight track fixed on the traveling main frame, the outer surface of the straight track is slidably connected with a driving platform, the driving platform is fixed to the support frame, the outer surface of the support frame is fixed with a cable machine, one end of the cable machine steel cable is fixed to the hinge plate, and two pulleys are installed on the outer surface of the support frame, and the two pulleys are connected to the steel cable transmission of the cable machine.

[0021] By adopting the above technical solution, when setting up a safe construction area, the cable crane is controlled to release the steel cable to flip the hinged plate. The stability of the cable crane when the steel cable is retracted and released is increased by setting two pulleys. The support frame can be driven up and down by controlling the driving platform. When the support frame and the hinged plate need to be folded after the box beam is laid, the driving platform needs to be controlled to drive the support frame to move to the bottom, and then the hinged plate needs to be flipped to the inside of the support frame to prevent the hinged plate from interfering with the bridge when flipping.

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

[0023] By adopting the above technical solution, when a group of protection mechanisms cooperate to set up a safety area, the two motors in the group of protection mechanisms are controlled to start. At this time, the motor drives the gear to rotate, so that the gear drives the baffle to extend through the engagement of the rack. Then, the two cable machines in the group of protection mechanisms are controlled to release the steel cable, and the two hinged plates are flipped. The two hinged plates in the group of protection mechanisms will be placed on the two baffles respectively, and the baffles provide support for the hinged plates, thereby increasing the stability of the hinged plates.

[0024] Compared with the prior art, the bridge erecting machine with a safety protection structure for bridge construction has the following beneficial effects: The present invention is provided with an installation mechanism. When the device is installed with the box beam, the long cylinder is inserted into the reserved hole on the upper surface of the box beam. At this time, the anti-skid ring plate will fit the upper surface of the box beam. Then the staff only needs to use the electric air gun and drive the two-way threaded rod to rotate through the hexagonal head. When the U-shaped plate moves, it will drive the sliding rod to slide in the L-shaped sliding groove through the inclined sliding groove. The sliding rod first moves horizontally. At this time, the two top moving plates are flipped to be parallel to the inner top wall of the box beam, and the sliding rod moves vertically upward again. At this time, the two top moving plates move upward close to the inner top wall of the box beam, and the two top moving plates cooperate with the anti-skid ring plate to clamp and fix the box beam to complete the installation. The box beam can be lifted and transported by a cable crane and a mobile platform, making the lifting process of the box beam more convenient and quick. When disassembling, it only needs to drive the two-way threaded rod to rotate in the opposite direction to retract the two top moving plates into the long cylinder, so that the installation mechanism can be taken out from the box beam. Through this installation and fixing method, the workers only need to operate on the upper surface of the box beam, avoiding the safety hazard when the workers enter and exit the internal space of the box beam. At the same time, the operation is simple, convenient and quick.

[0025] 2. The present invention is provided with a protection mechanism. Before the box girder and the pier are connected, two support frames in one group of protection mechanisms are controlled to descend to the bottom, and two baffles in one group of protection mechanisms are controlled to extend, and then two hinged plates in one group of protection mechanisms are controlled to flip. The two hinged plates will be placed on the two baffles respectively, and the safety guardrails on the two hinged plates will cooperate to form a safe area for workers to operate. The safety area is convenient for workers to carry out subsequent work. Workers can enter the safety guardrail through the L-shaped climbing guardrail and the climbing bracket in turn, and guardrails are provided on the L-shaped climbing guardrail, the climbing bracket and the safety guardrail to improve the safety of workers at work.

[0026] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure when the box girder and the bridge pier are butt-jointed in the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure after the two hinged plates in the present invention are turned over; Figure 4 For the present invention Figure 3 The enlarged schematic diagram of point A in the middle; Figure 5 It is a three-dimensional structural schematic diagram of the protection mechanism in the present invention; Figure 6It is a schematic diagram of the three-dimensional structure of the mobile platform and the cable crane in the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the installation mechanism in the present invention; Figure 8 It is a schematic diagram of the disassembled structure of the installation mechanism in the present invention; Fig. 9 It is a schematic diagram of the separate structure of the U-shaped plate 1 and the sliding rod in the present invention; Fig.10 It is a three-dimensional structural cross-sectional view of the long tube, the fixing ring, the telescopic spring and the shielding tube in the present invention; Fig.11 It is a three-dimensional structural schematic diagram of the initial state of the mounting mechanism of the present invention; Fig.12 It is a schematic diagram of the three-dimensional structure after the two ejector plates in the present invention are unfolded.

[0028] In the figure: 1. Main frame; 2. Sliding track; 3. Mobile platform; 4. L-shaped climbing guardrail; 5. Protection mechanism; 501. Straight track; 502. Driving platform; 503. Support frame; 504. Climbing bracket; 505. Articulated plate; 506. Safety guardrail; 507. Cable machine; 508. Pulley; 509. Sleeve; 510. Baffle; 511. Rack; 512. Motor; 513. Gear; 6. Installation mechanism; 601. Long cylinder; 602. Push plate; 603. Extrusion plate; 604. Roller; 605. Long rod; 606. Articulated block; 607. Articulated rod; 608. Sliding rod; 609. Sliding tube; 610. Support plate 1; 611. W-shaped plate; 612. Pillar; 613. Anti-slip seat; 614. Limit rod; 615. Fixed ring; 616. Telescopic spring; 617. Blocking cylinder; 618. Fixed plate; 619. Support plate 2; 620. Support plate 3; 621. Bidirectional threaded rod; 622. Hexagonal head; 623. U-shaped plate 1; 624. Oblique slide; 625. U-shaped plate 2; 626. L-shaped slide; 627. Anti-slip ring plate; 628. Sliding plate; 7. Middle hydraulic support; 8. Front hydraulic support; 9. Cable crane. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figures 1 to 12The present invention provides the following implementation scheme: A bridge erecting machine for bridge construction with a safety protection structure includes a traveling main frame 1, a sliding track 2 is fixed to the inner wall of the traveling 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 traveling main frame 1, and two front hydraulic supports 8 are installed on the right side of the traveling main frame 1.

[0031] Please refer to Figure 1 and Figure 2 When installing the box girder, the main frame 1 is driven to move on the bridge, so that the two front hydraulic supports 8 are moved to the top of the blank pier, and the two front hydraulic supports 8 are controlled to move downward and support on the pier. At the same time, the two middle hydraulic supports 7 are controlled to move downward and support on the bridge, so as to increase the stability of the device when erecting the box girder.

[0032] Please refer to Figure 6 , Figure 7 and Fig.10 Four cable cranes 9 are installed below the mobile platform 3. The bottom ends of the steel cables of the four cable cranes 9 are all provided with mounting mechanisms 6. The mounting mechanisms 6 include a long cylinder 601. Two push plates 602 are hingedly connected to the inner wall of the long cylinder 601. A long rod 605 is provided inside the long cylinder 601. A squeeze plate 603 is fixed to the bottom end of the long rod 605. Rollers 604 are rotatably connected to both sides of the squeeze plate 603. A hinge block 606 is fixed to the top of the long rod 605. Two hinge rods 607 are hingedly connected to the outer surface of the hinge block 606. The ends of the two hinge rods 607 that are away from each other are hinged with sliding rods 608. When the squeeze plate 603 moves upward, the two rollers 604 on the squeeze plate 603 will squeeze the two push plates 602 respectively, so that the two push plates 602 are turned over. The arrangement of the rollers 604 reduces the friction force when the squeeze plate 603 squeezes the push plate 602.

[0033] Please refer to Figure 7 , Figure 8 and Fig.11 The outer sleeve of the long tube 601 is provided with an anti-skid ring plate 627, and two sliding plates 628 are fixed on the upper surface of the anti-skid ring plate 627. Two support plates 610 are fixed on the top of the long tube 601. The outer surfaces of the two support plates 610 are fixed with pillars 612, and the bottom ends of the two pillars 612 are fixed with anti-skid seats 613. The two sliding plates 628 are slidably connected with the two pillars 612 respectively. The bottom surfaces of the anti-skid ring plate 627 and the anti-skid seats 613 are both provided with anti-skid patterns. When the installation mechanism 6 is in the initial state and is installed with the box beam, the long tube 601 is inserted into the reserved hole on the upper surface of the box beam. At this time, the anti-skid ring plate 627 and the two anti-skid seats 613 are both in contact with the upper surface of the box beam.

[0034] Please refer to Figure 6 and Figure 8The mounting mechanism 6 also includes a fixing plate 618, and two supporting plates 619 are fixed to the bottom surface of the fixing plate 618. The two supporting plates 619 are fixed to the upper surface of the anti-slip ring plate 627. A supporting plate 620 is arranged above the fixing plate 618. The two supporting plates 619 are fixed to the supporting plate 620, and the bottom end of the steel cable of the cable crane 9 is fixed to the supporting plate 620.

[0035] Please refer to Figure 8 , Fig. 9 and Fig.10 The tops of the two support plates 610 are both fixed with W-shaped plates 611, and the sides of the two W-shaped plates 611 close to each other are both fixed with two limit rods 614. Both ends of the two slide rods 608 are fixed with slide tubes 609, and the four slide tubes 609 are respectively slidably connected with the four limit rods 614. By setting the W-shaped plates 611 into a W shape, it is effectively avoided that the U-shaped plate 623 will interfere with the W-shaped plate 611 when moving.

[0036] The upper surface of the fixed plate 618 is rotatably connected to a bidirectional threaded rod 621, one end of which is fixed with a hexagonal head 622, and the outer surface of the bidirectional threaded rod 621 is threadedly connected to two symmetrical U-shaped plates 623, and the outer surfaces of the two U-shaped plates 623 are each provided with a group of inclined grooves 624, and the number of each group of inclined grooves 624 is two, and the two groups of inclined grooves 624 are respectively slidably connected to the two sliding rods 608.

[0037] When docking the box beam with the device, the box beam is moved to the bottom of the movable platform 3, and then the four long tubes 601 are respectively inserted into the four reserved holes on the upper surface of the box beam. At this time, the anti-slip ring plate 627 will fit the upper surface of the box beam, and the staff uses an electric pneumatic gun 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 away from each other. When the U-shaped plate 623 moves, it will drive the slide rod 608 to slide in the L-shaped slide groove 626 through the inclined slide groove 624.

[0038] Please refer to Figure 8 , Fig.11 and Fig.12 Two U-shaped plates 625 are fixed to the bottom surface of the fixed plate 618. The outer surfaces of the two U-shaped plates 625 are each provided with a group of L-shaped grooves 626. The number of each group of L-shaped grooves 626 is two. The two groups of L-shaped grooves 626 are slidably connected to the two sliding rods 608 respectively.

[0039] When the U-shaped plate 623 moves, the U-shaped plate 623 will first drive the slide bar 608 to slide horizontally in the L-shaped slide groove 626, and then the inclined slide groove 624 of the U-shaped plate 623 will squeeze the slide bar 608 to move vertically upward in the L-shaped slide groove 626.

[0040] Please refer to Fig.10 A fixing ring 615 is fixed on the outer surface of the long tube 601, and 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 both ends of the telescopic spring 616 are fixed to the fixing ring 615 and the shielding tube 617 respectively.

[0041] When the two pushing plates 602 are flipped, they will push and lift the blocking tube 617. After the pushing plates 602 are no longer squeezed by the squeezing plate 603, the blocking tube 617 moves downward under the spring pressure of the telescopic spring 616. The blocking tube 617 will block the bottom end of the long tube 601, blocking the two pushing plates 602 and keeping the two pushing plates 602 located in the long tube 601.

[0042] Please refer to Figure 2 , Figure 3 and Figure 5 Two groups of protection mechanisms 5 are arranged on the outside of the traveling main frame 1. Two L-shaped climbing guardrails 4 are fixed on the top of the traveling main frame 1. The number of each group of protection mechanisms 5 is two and they are centrally symmetrical. The protection mechanism 5 includes a support frame 503. The bottom end of the support frame 503 is hinged with a hinged plate 505. A climbing bracket 504 is fixed on the outer surface of the support frame 503. A safety guardrail 506 is fixed on the outer surface of the hinged plate 505.

[0043] After the two safety guardrails 506 in a set of protection mechanisms 5 are combined to form a safe construction area, workers can enter the safety guardrail 506 through the L-shaped climbing guardrail 4 and the climbing bracket 504 in turn, and guardrails are set on the L-shaped climbing guardrail 4, the climbing bracket 504 and the safety guardrail 506 to improve the safety of workers at work.

[0044] Please refer to Figure 3 and Figure 5 The protection mechanism 5 also includes a straight track 501 fixed on the traveling main frame 1, and the outer surface of the straight track 501 is slidably connected with a driving platform 502, and the driving platform 502 is fixed to the support frame 503. The outer surface of the support frame 503 is fixed with a cable machine 507, and one end of the steel cable of the cable machine 507 is fixed to the hinged plate 505. Two pulleys 508 are installed on the outer surface of the support frame 503, and the two pulleys 508 are connected to the steel cable transmission of the cable machine 507.

[0045] When setting up a safe construction area, the cable crane 507 is controlled to release the steel cable to flip the hinged plate 505. The two pulleys 508 are set to increase the stability of the cable crane 507 when the steel cable is retracted and released. The support frame 503 can be driven to rise and fall by controlling the driving platform 502. When the support frame 503 and the hinged plate 505 need to be folded after the box beam is laid, the driving platform 502 needs to be controlled to drive the support frame 503 to move to the bottom, and then the hinged plate 505 is controlled to flip to the inside of the support frame 503 to prevent the hinged plate 505 from interfering with the bridge when flipping.

[0046] Please refer to Figure 3 and Figure 4 A sleeve 509 is fixed to the bottom end of the support frame 503, and a baffle 510 adapted to 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, and 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.

[0047] When a group of protection mechanisms 5 cooperate to set up a safety area, the two motors 512 in the group of protection mechanisms 5 are controlled to start. At this time, the motor 512 drives the gear 513 to rotate, so that the gear 513 drives the baffle 510 to extend through the engagement of the rack 511, and then the two cable machines 507 in the group of protection mechanisms 5 are controlled to release the steel cable, and the two hinged plates 505 are flipped. The two hinged plates 505 in the group of protection mechanisms 5 will be placed on the two baffles 510 respectively, and the baffles 510 provide support for the hinged plates 505 to increase the stability of the hinged plates 505.

[0048] Working principle: When installing the box girder, the main frame 1 is driven to move on the bridge, so that the two front hydraulic supports 8 are moved to the top of the blank pier, and the two front hydraulic supports 8 are controlled to move downward and support on the pier. At the same time, the two middle hydraulic supports 7 are controlled to move downward and support on the bridge, so as to increase the stability of the device when erecting the box girder.

[0049] When setting up a safe construction area, the four driving platforms 502 in the two groups of protection mechanisms 5 are started synchronously, so that the driving platforms 502 drive the support frame 503 to move downward to the bottom of the straight track 501, and then the four motors 512 in the two groups of protection mechanisms 5 are controlled to start, so that the motor 512 drives the gear 513 to rotate, and the gear 513 drives the baffle 510 to extend through the engagement of the rack 511, and then the four cable machines 507 in the two groups of protection mechanisms 5 are controlled to release the steel cables, and the four hinged plates 505 are flipped, wherein the two hinged plates 505 in each group of protection mechanisms 5 will be respectively placed on the two baffles 510, and the two safety guardrails 506 in each group of protection mechanisms 5 will cooperate to form a safe construction area for workers to operate, and finally the four driving platforms 502 are synchronously controlled to rise, so that the two safe construction areas are moved to the docking area between the pier and the box girder, so as to facilitate the workers to carry out subsequent operations.

[0050] When docking the box beam with the device, the box beam is moved to the bottom of the movable platform 3, and then the four long tubes 601 are respectively inserted into the four reserved holes on the upper surface of the box beam. At this time, the anti-slip ring plate 627 will fit the upper surface of the box beam. The staff uses an electric air gun and drives the two-way threaded rod 621 to rotate through the hexagonal head 622. The rotation of the two-way threaded rod 621 drives the two U-shaped plates 1 623 to move away from each other. When the U-shaped plate 1 623 moves, it will drive the slide rod 608 to slide in the L-shaped slide groove 626 through the inclined slide groove 624; The slide bar 608 first moves horizontally in the L-shaped slide groove 626, and the slide bar 608 drives the hinge block 606 to rise through the hinge rod 607. The hinge block 606 drives the extrusion plate 603 to rise through the long rod 605. When the extrusion plate 603 rises, it squeezes the two push plates 602 through the two rollers 604 to make the two push plates 602 flip. When the two push plates 602 flip, they push and lift the shielding cylinder 617. Finally, the two push plates 602 flip to be parallel to the top wall of the box beam, and the extrusion plate 603 prevents the two push plates 602 from flipping in the opposite direction. The slide bar 608 then moves vertically upward in the L-shaped slide groove 626, and the slide bar 608 drives the W-shaped plate 611 to rise through the two limit rods 614. The W-shaped plate 611 drives the long tube 601 and the two push plates 602 to rise through the support plate 1 610. The two push plates 602 move upward close to the inner top wall of the box beam, and then the two push plates 602 will cooperate with the anti-slip ring plate 627 to clamp and fix the box beam to complete the installation. When disassembling, it is only necessary to drive the two-way threaded rod 621 to rotate in the opposite direction, so that the two push plates 602 are retracted into the long tube 601, and the installation mechanism 6 can be taken out of the box beam. Through this installation and fixing method, the workers only need to work on the upper surface of the box beam, avoiding the safety hazards when the workers enter and exit the internal space of the box beam. At the same time, the operation is simple, convenient and fast.

[0051] When the box girder is docked with the bridge pier, the clamped box girder is lifted by synchronously controlling the four cable cranes 9, and then the movable platform 3 is controlled to move, the box girder is lifted and transported, the box girder is moved to the bridge erection area, and then the box girder is moved downward to dock with the bridge pier.

[0052] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in 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), an extrusion plate (603) is fixed to the bottom end of the long rod (605), both sides of the extrusion plate (603) are rotatably connected with rollers (604), 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 sliding plates (628) are fixed on the upper surface of the anti-slip ring plate (627). Two supporting plates (610) are fixed on the top of the long tube (601), and pillars (612) are fixed on the outer surfaces of the two supporting plates (610). The bottom ends of the two pillars (612) are fixed with anti-slip seats (613), and the two sliding plates (628) are slidably connected to the two pillars (612) respectively. Two groups of protection mechanisms (5) are arranged outside the traveling main frame (1), two L-shaped climbing guardrails (4) are fixed above the traveling main frame (1), the number of each group of protection mechanisms (5) is two and they are centrally symmetrical, the protection mechanism (5) comprises a support frame (503), a hinged plate (505) is hinged at the bottom end of the support frame (503), a climbing bracket (504) is fixed on the outer surface of the support frame (503), and a safety guardrail (506) is fixed on the outer surface of the hinged plate (505).

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: The mounting mechanism (6) further comprises a fixing plate (618), the bottom surface of which is fixed two supporting plates (619), the two supporting plates (619) being fixed to the upper surface of the anti-slip ring plate (627), a supporting plate (620) being arranged above the fixing plate (618), the two supporting plates (619) being fixed to the supporting plate (620), and the bottom end of the steel cable of the cable crane (9) being fixed to the supporting plate (620).

4. The bridge erecting machine with a safety protection structure for bridge construction according to claim 1, characterized in that: 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) that are 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.

5. The bridge erecting machine with a safety protection structure for bridge construction according to claim 3, characterized in that: 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 L-shaped grooves. The two groups of L-shaped grooves (626) are respectively slidably connected to the two sliding rods (608).

6. The bridge erecting machine with a safety protection structure for bridge construction according to claim 3, characterized in that: The upper surface of the fixed plate (618) is rotatably connected to a bidirectional threaded rod (621), one end of which is fixed with a hexagonal head (622), and the outer surface of the bidirectional threaded rod (621) is threadedly connected to two symmetrical U-shaped plates (623), and 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, and the two groups of inclined grooves (624) are respectively slidably connected to the two sliding rods (608).

7. 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).

8. 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.

9. The bridge erecting machine with a safety protection structure for bridge construction according to claim 1, 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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