Bridge girder erection machine and girder transporting vehicle combined operation platform for turning around on bridge floor

Abstract

The invention discloses a bridge girder erection machine and girder transporting vehicle combined operation platform for bridge deck turning, and relates to the technical field of bridge erection, the bridge girder erection machine and the girder transporting vehicle are included, a camel frame is arranged on the girder transporting vehicle, a turntable is arranged on the camel frame, an extrusion device is arranged on the turntable, a locking device is arranged on the inner side of the extrusion device, and the extrusion device is connected with the bridge girder erection machine. The extruding device comprises a mounting bin, a swinging mechanism and a connecting rod mechanism, the mounting bin is located on the rotating disc, the swinging mechanism is arranged on the inner side of the mounting bin, and the connecting rod mechanism is arranged on one side of the swinging mechanism; the bridge erecting machine is prevented from displacing or loosening in the process of working and turning around, the stability and safety of operation are ensured, the locking device can achieve rapid locking and unlocking of the main beam, the operation platform can ensure the stability of the bridge erecting machine in the process of transportation and turning around, and the working efficiency of bridge erecting is improved.

Description

Technical Field

[0001] This invention relates to the field of bridge erection technology, specifically a combined working platform for bridge erection machine and beam transport vehicle used for bridge deck turning. Background Technology

[0002] Bridge erecting machines and girder transport vehicles are indispensable equipment in modern bridge construction. Their coordinated operation enables the efficient completion of tasks such as bridge prefabrication, installation, and transportation. During bridge erection, after completing the work on one span of the bridge, the bridge erecting machine needs to turn around on the bridge deck to move to another span or return. Traditional turning methods mainly rely on large auxiliary cranes, which are unsafe and costly, posing significant drawbacks.

[0003] Existing technology CN112323643A discloses a beam transport vehicle and a method for transporting and erecting bridges. The technical solution discloses that "This invention relates to a beam transport vehicle and a method for transporting and erecting bridges, belonging to the field of high-speed railway construction engineering technology. It includes two identical beam transport vehicles, each equipped with an independent power module; a connecting mechanism connects the two beam transport vehicles into a whole. Using the beam transport vehicle and bridge erecting machine method of this invention, two independent beam transport vehicles are transported by front and rear overhead cranes." When the beam transport vehicle enters the bridge erecting machine, there is no need to remove the lower crossbeam of the "O"-shaped legs, improving the construction efficiency of transporting the bridge erecting machine and shortening the construction time. The lower crossbeam of the "O"-shaped legs of the bridge erecting machine does not need to be removed during transport; the support mechanism on the top surface of the box girder is the same in both box girder erection and transport scenarios, facilitating optimization of the "O"-shaped leg design of the bridge erecting machine. This reduces the steps involved in transporting the bridge erecting machine by the beam transport vehicle, improves its efficiency, and has promising market application prospects. Although the existing technology has disclosed a method for transporting a beam-carrying vehicle and a bridge-erecting machine, there are still some shortcomings, including: 1. The bridge-erecting machine is fixed by flange bolts in the connection between the camel frame and the bridge-erecting machine. The installation and disassembly process relies too much on manual operation, which is time-consuming, complicated and inefficient.

[0004] 2. The bridge erecting machine lacks a corresponding locking mechanism when it is fixed, and the connection between the bridge erecting machine and the camel frame is unstable. During the turning process of the bridge erecting machine, it is subjected to complex vibrations and impacts, and the overall structure is prone to loosening, affecting the safety and stability of the overall operation. Summary of the Invention

[0005] The purpose of this invention is to provide a combined working platform for bridge erecting machine and beam transport vehicle for bridge deck turning, so as to solve the problems mentioned in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a combined working platform for bridge erecting machine and beam transport vehicle for bridge deck turning, comprising a beam transport vehicle and a bridge erecting machine, wherein the beam transport vehicle is equipped with a camel frame, the camel frame is equipped with a turntable, the turntable is equipped with a pressing device, the inner side of the pressing device is equipped with a locking device, and the pressing device is connected to the bridge erecting machine. The extrusion device includes an installation chamber, a swing mechanism, and a linkage mechanism. The installation chamber is located on the turntable and has at least one installation slot. The swing mechanism is installed within the installation slot, and a linkage mechanism is installed on one side of the swing mechanism. The swing mechanism drives the linkage mechanism to operate. The beam transport vehicle serves as the mobile base and installation foundation for the entire working platform, used to transport beam segments and move the bridge erecting machine. The bridge erecting machine transports the beam segments to the installation position and follows the platform to complete the bridge deck turning operation. The gantry frame, hydraulically driven, is the load-bearing structure between the beam transport vehicle and the turntable, supporting and bearing the load of the bridge erecting machine. The turntable is the core component for the turning operation; it is hydraulically driven and responsible for supporting the rotation of the bridge erecting machine. The extrusion device is used to press the turntable and the main beam together when the turntable and the bridge erecting machine are fixed, preventing vibration and deviation of the bridge erecting machine during operation and turning. The shifting and locking device is used to lock the extrusion device mechanically when the extrusion device fixes the turntable to the main beam, preventing the extrusion device from loosening and vibrating due to long-term stress, and improving the overall stability of the device. The installation chamber provides support and installation foundation for the extrusion device. The installation chamber has two opposite installation slots, in which a swing mechanism and a linkage mechanism are installed respectively. The swing mechanism converts the rotational motion of the motor into the swing of the sector gear, thereby driving the linkage mechanism to swing. The linkage mechanism drives the wedge blocks on both sides to move synchronously through the swing.

[0007] The swing mechanism includes a drive element located outside the mounting chamber. A screw is mounted on the output shaft of the drive element, and the screw is located inside the mounting chamber. A plate-shaped protrusion is provided on the inner wall of the mounting chamber, and a rotating shaft is mounted on the plate-shaped protrusion. The rotating shaft is rotatably connected to the plate-shaped protrusion, and a sector gear is mounted on the rotating shaft. The screw meshes with the sector gear. Specifically, the drive element is an electric motor, which drives the screw to rotate. The screw meshes with the sector gear, converting the rotational motion of the screw into the oscillation of the sector gear. The screw has a self-locking characteristic, effectively preventing the sector gear from rotating in the opposite direction due to the reaction force of the load when the drive element stops operating. The plate-shaped protrusion provides a mounting base for the rotating shaft and other components. The rotating shaft drives the ratchet and sector gear on it to rotate synchronously.

[0008] The linkage mechanism includes a rocker arm located on a rotating shaft and rotatably connected to the shaft. A first swing arm is rotatably connected to one side of the rocker arm, and a second swing arm is mounted on one side of the first swing arm. The first and second swing arms are installed parallel to each other. The rocker arm rotates around the rotating shaft, causing the first and second swing arms to rotate and oscillate synchronously.

[0009] A movable rod (first) and a movable rod (second) are provided between the first and second swing rods. The movable rods are installed in parallel, with the first movable rod located closer to the driving element and the second movable rod located further away from the driving element. The movable rods are rotatably connected to the first and second swing rods. The first and second swing rods, the movable rods, and the movable rods together form a parallelogram frame. Through the linkage between the second swing rod and the first movable rod, the movable rod moves linearly towards one side of the pressure plate, thus driving the movable rod to move in a straight line.

[0010] A clamping plate is provided on one side of the mounting slot, and the clamping plate is slidably connected to the mounting chamber. A slider is provided at one end of the second moving rod. A track that cooperates with the slider is provided on the inner wall of the clamping plate. The slider is slidably connected to the clamping plate. A connecting plate is provided on the lower side of the slider, and wedge blocks are respectively provided at both ends of the connecting plate. The clamping plate is in direct contact with the main beam of the bridge erecting machine, transmitting the clamping force provided by the linkage mechanism to the surface of the main beam. The clamping plate is slidably connected to the mounting chamber to ensure the stability of the clamping plate's movement. The slider is used to receive the drive from the second moving rod and moves linearly along the track of the clamping plate, thereby driving the wedge blocks on both sides to move linearly.

[0011] The locking device includes a ratchet located on a rotating shaft and rotatably connected to the rotating shaft. A plug cylinder is provided on the inner wall of the mounting chamber, located above the ratchet. An electromagnet is provided on the top of the plug cylinder, and an elastic element one is provided on the lower side of the electromagnet. A pawl is provided on one side of the elastic element one. An elastic element two is provided between the clamping plate and the inner wall of the mounting chamber. The ratchet provides anti-reverse function for the rotating shaft and matches the clamping stroke of the wedge block with the rotation angle of the rotating shaft. The plug provides support for the pawl and the first elastic element, ensuring that the pawl can only move vertically inside the plug and thus fall into the tooth groove of the ratchet. The electromagnet is used to attract the pawl into the plug during the disassembly of the bridge erecting machine, thereby releasing the lock on the ratchet. The first elastic element is specifically a spring. The function of the first elastic element is to store elastic potential energy. When the electromagnet is energized to lift the pawl, the first elastic element is compressed and stores elastic potential energy. After the electromagnet is de-energized, the elastic potential energy stored in the first elastic element is released, and the pawl is pushed back into the tooth groove, locking the ratchet. The second elastic element resets the pressure plate when the ratchet is unlocked.

[0012] The clamping plate has inclined surfaces at both ends that mate with wedge blocks, and the pawl is shaped to match the ratchet. The pawl is made of magnetic material. The shape of the wedge blocks matches the shape of the side of the clamping plate, which can better provide clamping force to the clamping plate and ensure that the clamping plate can contact the main beam more firmly. The ratchet and pawl mate to ensure that the pawl can smoothly engage with the ratchet, providing a reliable locking function for the rotating shaft.

[0013] The bridge erecting machine includes a main beam connected to an installation chamber. Support legs are located on both sides of the main beam, and a lifting device is slidably mounted on the main beam. The main beam forms the main structure of the bridge erecting machine, the support legs provide support for the entire machine, and the lifting device is used to transport the bridge beams to the installation position.

[0014] An ammeter is installed inside the mounting chamber, and a pressure sensor is installed inside the wedge block. The ammeter, pressure sensor, and control system are electrically connected. The ammeter monitors the current of the drive element, directly reflecting the output torque of the drive element. In conjunction with the pressure sensor, the clamping force at the main beam can be determined.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses a pressing device, through a screw, sector gear and linkage mechanism, to press the pressing plate, which can make the pressing plate fit tightly with the main beam, ensuring that the bridge erecting machine maintains a high degree of stability during operation and turning, and effectively avoiding loosening problems caused by vibration or impact.

[0016] 2. The present invention further enhances the reliability of the entire working platform through the locking device. The cooperation between the pawl and the ratchet ensures that the rotating shaft will not rotate in reverse when the pressing device is working, thereby avoiding the loosening of the pressing plate due to external force. The locking device can better lock the main beam when the bridge erecting machine performs bridge deck turning operation. Attached Figure Description

[0017] Figure 1 This is a perspective view of the overall structure of the present invention; Figure 2 This is a perspective view of the camel frame structure of the present invention; Figure 3 This is a perspective view of the installation compartment structure of the present invention; Figure 4 This is a perspective view of the internal structure of the installation compartment of the present invention; Figure 5 This is a perspective view of the extrusion device structure of the present invention; Figure 6 This is a perspective view of the locking device structure of the present invention; Figure 7 This is a cross-sectional view of the installation compartment structure of the present invention; Figure 8For the present invention Figure 7 A magnified view of a portion of region A in the middle.

[0018] In the diagram: 1. Beam transport vehicle; 2. Bridge erecting machine; 21. Main beam; 22. Outrigger; 23. Lifting device; 3. Camel frame; 4. Turntable; 5. Extrusion device; 51. Installation compartment; 52. Swinging mechanism; 521. Drive element; 522. Screw; 523. Rotating shaft; 524. Sector gear; 53. Linkage mechanism; 531. Rocker arm; 532. Swing arm one; 533. Swing arm two; 534. Moving rod one; 535. Moving rod two; 536. Slider; 537. Connecting plate; 538. Wedge block; 54. Pressing plate; 6. Locking device; 61. Ratchet; 62. Plug; 63. Electromagnet; 64. Elastic element one; 65. Pawl; 66. Elastic element two; 7. Ammeter. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1 - Figure 8 This invention provides a technical solution: a combined working platform for bridge deck turning, comprising a bridge erecting machine and a beam transport vehicle, including a beam transport vehicle 1 and a bridge erecting machine 2. The beam transport vehicle 1 is equipped with a camel frame 3, and a turntable 4 is mounted on the camel frame 3. A pressing device 5 is mounted on the turntable 4, and a locking device 6 is installed inside the pressing device 5. The pressing device 5 is connected to the bridge erecting machine 2. The beam transport vehicle 1 serves as the mobile base and installation foundation for the entire working platform, used for transporting beam segments and moving the bridge erecting machine 2. The bridge erecting machine 2 transports the beam segments to the installation position, following the platform to complete the bridge deck turning operation. The camel frame 3 is hydraulically driven and connects the beam transport vehicle 1 and the turntable 4. The load-bearing structure between the discs 4 can support and bear the load of the bridge erecting machine 2. The turntable 4 is the core component for turning over. The turntable 4 is hydraulically driven and is responsible for supporting the rotation of the bridge erecting machine 2. The pressing device 5 is used to press the turntable 4 and the main beam 21 together when the turntable 4 is fixed to the bridge erecting machine 2, so as to prevent the bridge erecting machine 2 from vibrating and deviating during operation and turning over. The locking device 6 is used to lock the pressing device 5 by mechanical locking when the pressing device 5 fixes the turntable 4 to the main beam 21, so as to prevent the pressing device 5 from loosening and vibrating due to long-term stress, and improve the overall stability of the device.

[0021] The extrusion device 5 includes an installation chamber 51, a swing mechanism 52, and a linkage mechanism 53. The installation chamber 51 is located on the turntable 4 and has at least one installation slot. The swing mechanism 52 is installed in the installation slot, and the linkage mechanism 53 is installed on one side of the swing mechanism 52. The swing mechanism 52 drives the linkage mechanism 53 to rotate. The installation chamber 51 provides support and a mounting base for the extrusion device 5. Specifically, the installation chamber 51 has two opposing installation slots, in which the swing mechanism 52 and the linkage mechanism 53 are installed respectively. The swing mechanism 52 converts the rotational motion of the motor into the swing of the sector gear 524, thereby driving the linkage mechanism 53 to swing. The linkage mechanism 53 drives the two wedge blocks 538 on both sides to move synchronously through the swing.

[0022] The swing mechanism 52 includes a drive element 521, which is located on the outside of the mounting chamber 51. A screw 522 is provided on the output shaft of the drive element 521. The screw 522 is located on the inside of the mounting chamber 51. A plate-shaped protrusion is provided on the inner wall of the mounting chamber 51. A rotating shaft 523 is provided on the plate-shaped protrusion. The rotating shaft 523 is rotatably connected to the plate-shaped protrusion. A sector gear 524 is provided on the rotating shaft 523. The screw 522 is meshed with the sector gear 524. The drive element 521 is specifically an electric motor. The drive element 521 is used to drive the screw 522 to rotate. The screw 522 meshes with the sector gear 524, converting the rotational motion of the screw 522 into the oscillation of the sector gear 524. The screw 522 has a self-locking characteristic, which can effectively prevent the sector gear 524 from rotating in the opposite direction due to the reaction force of the load when the drive element 521 stops operating. The plate-shaped protrusion provides a mounting base for components such as the rotating shaft 523. The rotating shaft 523 is used to drive the ratchet 61 and the sector gear 524 on it to rotate synchronously.

[0023] The linkage mechanism 53 includes a rocker arm 531, which is located on a rotating shaft 523 and rotatably connected to the rotating shaft 523. A first swing arm 532 is rotatably connected to one side of the rocker arm 531, and a second swing arm 533 is mounted on one side of the first swing arm 532. The first and second swing arms 533 are installed parallel to each other. The rocker arm 531 rotates around the rotating shaft 523, causing the first and second swing arms 532 and 533 to rotate and swing synchronously.

[0024] A movable rod 534 and a movable rod 535 are provided between the first pendulum rod 532 and the second pendulum rod 533. The movable rod 534 and the movable rod 535 are installed in parallel, with the first movable rod 534 located on the side closer to the driving element 521 and the movable rod 535 located on the side farther from the driving element 521. The movable rod 534 and the movable rod 535 are rotatably connected to the first pendulum rod 532 and the second pendulum rod 533. The first pendulum rod 532, the second pendulum rod 533, the movable rod 534, and the movable rod 535 together form a parallelogram frame. Through the linkage between the second pendulum rod 533 and the movable rod 534, the movable rod 535 is driven to move linearly towards one side of the pressure plate 54, thereby driving the movable rod 535 to move in a straight line.

[0025] A clamping plate 54 is provided on one side of the mounting slot, and the clamping plate 54 is slidably connected to the mounting chamber 51. A slider 536 is provided at one end of the second moving rod 535. A track is provided on the inner wall of the clamping plate 54 to cooperate with the slider 536. The slider 536 is slidably connected to the clamping plate 54. A connecting plate 537 is provided on the lower side of the slider 536, and wedge blocks 538 are provided at both ends of the connecting plate 537. The clamping plate 54 is directly disengaged from the main beam 21 of the bridge erecting machine 2, and the clamping force provided by the linkage mechanism 53 is transmitted to the surface of the main beam 21. The clamping plate 54 is slidably connected to the mounting chamber 51 to ensure the stability of the movement of the clamping plate 54. The slider 536 is used to receive the drive from the second moving rod 535 and moves linearly along the track of the clamping plate 54, thereby driving the wedge blocks 538 on both sides to move linearly.

[0026] The locking device 6 includes a ratchet 61, which is located on a rotating shaft 523 and is rotatably connected to the rotating shaft 523. A plug cylinder 62 is provided on the inner wall of the mounting chamber 51, which is located above the ratchet 61. An electromagnet 63 is provided on the top of the plug cylinder 62, and an elastic element 64 is provided on the lower side of the electromagnet 63. A pawl 65 is provided on one side of the elastic element 64. An elastic element 66 is provided between the clamping plate 54 and the inner wall of the mounting chamber 51. Ratchet 61 provides anti-reverse function for shaft 523 and matches the clamping stroke of wedge block 538 with the rotation angle of shaft 523. Plug 62 provides support for pawl 65 and elastic element 64, ensuring that pawl 65 can only move vertically inside plug 62, thus falling into the tooth groove of ratchet 61. Electromagnet 63 is used to attract pawl 65 into plug 62 during disassembly of bridge erecting machine 2, thereby releasing the lock on ratchet 61. Elastic element 64 is specifically a spring, and its function is to store elastic potential energy. When electromagnet 63 is energized to lift pawl 65, elastic element 64 is compressed and stores elastic potential energy. After electromagnet 63 is de-energized, the stored elastic potential energy of elastic element 64 is released, pawl 65 is pushed back into the tooth groove, locking ratchet 61. Elastic element 66 resets pressure plate 54 when ratchet 61 is unlocked.

[0027] The clamping plate 54 has inclined surfaces at both ends that mate with the wedge blocks 538. The pawl 65 matches the shape of the ratchet 61 and is made of magnetic material. The shape of the wedge blocks 538 matches the shape of the sides of the clamping plate 54, which can better provide clamping force to the clamping plate 54 and ensure that the clamping plate 54 can contact the main beam 21 more securely. The ratchet 61 and pawl 65 cooperate to ensure that the pawl 65 can smoothly engage with the ratchet 61, providing a reliable locking function for the rotating shaft 523.

[0028] The bridge erecting machine 2 includes a main beam 21, which is connected to the installation chamber 51. Support legs 22 are provided on both sides of the main beam 21, and a lifting device 23 is slidably installed on the main beam 21. The main beam 21 is the main structure of the bridge erecting machine 2, the support legs 22 provide support for the entire bridge erecting machine 2, and the lifting device 23 is used to transport the bridge beams to the installation position.

[0029] An ammeter 7 is installed inside the mounting chamber 51, and a pressure sensor is installed inside the wedge block 538. The ammeter 7, the pressure sensor, and the control system are electrically connected. The ammeter 7 is used to monitor the current of the drive element 521, which directly reflects the output torque of the drive element 521. In conjunction with the pressure sensor, the clamping force at the main beam 21 can be determined.

[0030] The working principle of this invention is as follows: Before performing the turning operation, the device first selects the area directly above the pier of the straight section as the turning site, ensuring that there are no obstacles hindering the rotation within the rotation radius of the bridge erecting machine 2. The hydraulic system drives the bridge erecting machine 2 to rise to a certain height, the outrigger 22 on one side retracts, the beam transport vehicle 1 moves to the carrying position, the bridge erecting machine 2 lowers to a certain height, the main beam 21 and the camel frame 3 are locked by the pin, the outrigger 22 retracts, and the beam transport vehicle 1 transports the bridge erecting machine 2 to the turning site.

[0031] After the bridge erecting machine 2 is transported to the turning point, the supports on both sides lift the bridge erecting machine 2 to a certain height, and install the turntable 4 and the installation chamber 51 onto the camel frame 3. The control system controls the operation of the drive element 521, which drives the screw 522 to rotate. The screw 522 drives the sector gear 524 to rotate counterclockwise. The sector gear 524 drives the rotating shaft 523 to rotate counterclockwise. The rotating shaft 523 drives the rocker arm 531 to swing. The rocker arm 531 drives the parallelogram frame composed of the first rocker arm 532, the second rocker arm 533, the first moving rod 534, and the second moving rod 535 to swing towards one side of the pressure plate 54. The second moving rod 535 drives the slider 536 to move along the track towards the pressure plate. When the slider 536 moves horizontally to one side of the pressure plate 54, the connecting plate 537 and the wedge blocks 538 on both sides move horizontally to one side of the pressure plate 54. The wedge blocks 538 on both sides enter the gaps on both sides of the pressure plate 54, pressing the pressure plates 54 tightly against the side of the main beam 21. The rotating shaft 523 drives the ratchet 61 to rotate counterclockwise. At this time, the electromagnet 63 is de-energized. While the ratchet 61 rotates, the pawl 65 moves up and down under the drive of the elastic element 64. When the pressure between the wedge block 538 and the pressure plate 54 or the value of the ammeter 7 exceeds the set value, the drive element 521 stops operating. At this time, the pawl 65 falls into the tooth groove of the ratchet 61, which plays a locking role.

[0032] The outriggers 22 on both sides are retracted, and the hydraulic system drives the turntable 4 to rotate slowly until the main beam 21 rotates 180 degrees, completing the turning action of the bridge erecting machine 2. The outriggers 22 on both sides support the ground, and the control system energizes the electromagnet 63. The electromagnet 63 attracts the pawl 65 into the plug cylinder 62, releasing the lock on the ratchet 61. The drive element 521 drives the screw 522 to rotate in the opposite direction, and the sector gear 524 drives the rotating shaft 523 to rotate clockwise. The rotating shaft 523 drives the rocker arm 531 to swing. The rocker arm 531 drives the parallelogram formed by the first rocker arm 532, the second rocker arm 533, the first moving rod 534, and the second moving rod 535. The frame swings away from the pressure plate 54. The moving rod 535 drives the slider 536 to move horizontally along the track away from the pressure plate 54. The slider 536 drives the connecting plate 537 and the wedge blocks 538 on both sides to move horizontally away from the pressure plate 54. The wedge blocks 538 on both sides move away from the pressure plate 54. The elastic element 66 resets the pressure plate 54. The support leg 22 lifts the bridge erecting machine 2 and removes the turntable 4. The support leg 22 then drives the bridge erecting machine 2 to fall onto the camel frame 3. The beam transport vehicle 1 is then lifted to the bottom of the bridge by the lifting device 23. After the beam transport vehicle 1 turns around on the ground, it is lifted to the bridge surface by the lifting device 23.

[0033] 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 invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A bridge girder erection machine and girder transport vehicle combination work platform for bridge deck turning, characterized in that: The utility model provides an extrusion device and bridge erecting machine, including beam transport vehicle (1) and bridge erecting machine (2), be provided with the camelback (3) on beam transport vehicle (1), be provided with the turntable (4) on the camelback (3), be provided with extrusion device (5) on the turntable (4), the inside of extrusion device (5) is provided with locking device (6), and extrusion device (5) is connected with bridge erecting machine (2); The extrusion device (5) includes a mounting bin (51), a swing mechanism (52), and a connecting rod mechanism (53). The mounting bin (51) is located on the turntable (4). At least one mounting slot is formed in the mounting bin (51). The swing mechanism (52) is arranged in the mounting slot. The swing mechanism (52) is provided with the connecting rod mechanism (53) on one side. The swing mechanism (52) drives the connecting rod mechanism (53) to operate.

2. The combination bridge girder erection and transport vehicle platform of claim 1 wherein: The swing mechanism (52) includes a drive element (521). The drive element (521) is located outside the mounting bin (51). A screw rod (522) is arranged on the output shaft of the drive element (521). The screw rod (522) is located inside the mounting bin (51). A plate-shaped protrusion is arranged on the inner wall of the mounting bin (51). A rotating shaft (523) is arranged on the plate-shaped protrusion. The rotating shaft (523) is rotatably connected with the plate-shaped protrusion. A sector gear (524) is arranged on the rotating shaft (523). The screw rod (522) is meshingly connected with the sector gear (524).

3. The bridge girder launching platform of claim 2, wherein: The connecting rod mechanism (53) includes a rocker (531). The rocker (531) is located on the rotating shaft (523). The rocker (531) is rotatably connected with the rotating shaft (523). A swing rod one (532) is rotatably connected and arranged on one side of the rocker (531). A swing rod two (533) is arranged on one side of the swing rod one (532). The swing rod one (532) and the swing rod two (533) are parallelly arranged.

4. The bridge girder launching platform of claim 3, wherein: A moving rod one (534) and a moving rod two (535) are arranged between the swing rod one (532) and the swing rod two (533). The moving rod one (534) and the moving rod two (535) are parallelly arranged. The moving rod one (534) is located on one side close to the drive element (521). The moving rod two (535) is located on one side away from the drive element (521). The moving rod one (534) and the moving rod two (535) are rotatably connected with the swing rod one (532) and the swing rod two (533).

5. The bridge girder turning and launching platform of claim 4, wherein: A pressing plate (54) is arranged on one side of the mounting slot. The pressing plate (54) is slidably connected with the mounting bin (51). One end of the moving rod two (535) is provided with a sliding block (536). An inner wall of the pressing plate (54) is provided with a track matched with the sliding block (536). The sliding block (536) is slidably connected with the pressing plate (54). A connecting plate (537) is arranged below the sliding block (536). Wedge blocks (538) are arranged at two ends of the connecting plate (537).

6. The combination bridge girder erection and transport vehicle platform of claim 5 wherein: The locking device (6) comprises a ratchet wheel (61) located on the rotating shaft (523), the ratchet wheel (61) is in rotating connection with the rotating shaft (523), the inner wall of the mounting bin (51) is provided with a plug barrel (62), the plug barrel (62) is located on the upper side of the ratchet wheel (61), the top of the plug barrel (62) is provided with an electromagnet (63), the lower side of the electromagnet (63) is provided with an elastic element one (64), one side of the elastic element one (64) is provided with a ratchet pawl (65), and the elastic element two (66) is arranged between the pressing plate (54) and the inner wall of the mounting bin (51).

7. The bridge girder turning and launching platform of claim 6, wherein: The two ends of the pressing plate (54) are inclined surfaces matched with the wedge blocks (538), the shape of the ratchet pawl (65) is matched with the ratchet wheel (61), and the ratchet pawl (65) is made of a magnetic material.

8. The combination bridge girder erection and transport vehicle platform of claim 1 wherein: The bridge girder (2) comprises a main beam (21), the main beam (21) is connected with the mounting bin (51), the two sides of the main beam (21) are respectively provided with supporting legs (22), and the main beam (21) is slidably provided with a lifting tool (23).

9. The combination bridge girder erection and transport vehicle platform of claim 5 wherein: The inside of the mounting bin (51) is provided with a galvanometer (7), the inside of the wedge block (538) is provided with a pressure sensor, and the galvanometer (7), the pressure sensor and the control system are electrically connected.

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