Horizontal Rotation Device and Method of Bridge Erection Machine

Abstract

This invention discloses a horizontal rotation device for a bridge erecting machine, comprising a main beam, two sets of intermediate support legs, and two sets of auxiliary devices. The main beam includes two beam bodies and a main beam transverse joint hinged to the two beam bodies. Each set of intermediate support legs includes two intermediate support leg units, a support leg crossbeam, and an adjustment mechanism. The two intermediate support leg units are respectively hinged to the two beam bodies and slidably mounted on the support leg crossbeam. The adjustment mechanism is used to adjust the distance between the two intermediate support leg units. Each set of auxiliary devices includes two auxiliary support legs, which are respectively installed on the two beam bodies. The two sets of auxiliary devices and the two sets of intermediate support legs are used to alternately support the bridge deck to lift the main beam. This invention also provides a method for horizontal rotation of the bridge erecting machine. The described horizontal rotation device and method for the bridge erecting machine achieve horizontal rotation of the bridge erecting machine by alternately rotating the main beam and intermediate support legs horizontally. Therefore, it facilitates site relocation and is applicable to conditions where precast beams and cap beams intersect at an angle.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, specifically to a horizontal rotation device and method for a bridge erecting machine. Background Technology

[0002] With the booming development of infrastructure construction in my country, walking bridge erecting machines are often used to erect precast beams in highway bridge construction. During the erection of precast beams, interruptions often occur due to land acquisition and demolition, river channels, pipeline relocation, etc., making it impossible for the bridge erecting machine to operate continuously and requiring frequent site changes.

[0003] There are generally two methods for relocating bridge erecting machines. The first is to turn around on the spot and move on its own or to transport it as a whole using a beam transport vehicle. The second is to dismantle the bridge erecting machine, transport it to the point of use, and then reinstall it. If the bridge erecting machine cannot turn around for operation, the second method must be used, which will undoubtedly increase equipment costs and extend the construction period.

[0004] Meanwhile, if the bridge girder and the precast beam are obliquely intersecting, the bridge erecting machine also needs to be rotated horizontally to a certain angle for erection. Currently, bridge erecting machines do not have the function of rotating horizontally in place, and most of them use crude methods to forcibly rotate the beam, which poses a high safety risk and has low construction efficiency. Summary of the Invention

[0005] Therefore, it is necessary to provide a horizontal rotation device and method for existing bridge erecting machines, which are difficult to relocate and cannot erect cap beams and precast beams at an oblique angle due to their inability to perform horizontal rotation.

[0006] A horizontal rotation device for a bridge erecting machine, comprising:

[0007] The main beam includes two beam bodies and a main beam transverse link hinged to the two beam bodies;

[0008] Two sets of intermediate support legs are spaced apart on the main beam. Each set of intermediate support legs includes two intermediate support leg units, a support leg crossbeam, and an adjustment mechanism. The two intermediate support leg units are respectively hinged to two beam bodies, and the two intermediate support leg units are slidably disposed on the support leg crossbeam. The adjustment mechanism is used to adjust the distance between the two intermediate support leg units.

[0009] Two sets of auxiliary devices are spaced apart on the main beam. Each set of auxiliary devices includes two auxiliary legs, which are respectively installed on two beams. The two sets of auxiliary devices and the two sets of intermediate legs are used to alternately support the bridge deck to lift the main beam.

[0010] In one embodiment, the middle support leg unit includes a wheel mechanism, a middle support leg trolley, and a horizontal hinge device. The wheel mechanism is slidably mounted on the beam, and the middle support leg trolley is slidably disposed on the support leg crossbeam. The middle support leg trolley and the wheel mechanism are rotatably connected through the horizontal hinge device.

[0011] In one embodiment, the support leg beam is provided with a strip-shaped mounting hole extending along its axial direction, and the fastener on the middle support leg trolley passes through the mounting hole to fix the middle support leg trolley to the support leg beam.

[0012] In one embodiment, the middle support leg trolley includes a main body and a sliding member. The upper end of the main body is connected to the horizontal hinge device, and the sliding member is installed at the lower end of the main body. The sliding member slides in contact with the support leg beam.

[0013] In one embodiment, the main body includes a fixed part, a movable part, and a lifting cylinder. The sliding member is installed at the bottom of the fixed part. The movable part overlaps the fixed part at least partially. The two ends of the lifting cylinder are connected to the support leg beam and the movable part. The lifting cylinder drives the movable part to rise and fall relative to the fixed part.

[0014] In one embodiment, the adjustment mechanism includes two sets of transverse hydraulic cylinders, which are mounted on the support leg crossbeam. The two sets of transverse hydraulic cylinders are respectively connected to two middle support leg units, and the transverse hydraulic cylinders are used to drive the middle support leg units to slide on the support leg crossbeam.

[0015] In one embodiment, a traverse track is also included, which is arranged on the bridge deck, and the bottom of the outrigger beam is provided with a traveling wheel that moves along the traverse track.

[0016] In one embodiment, the system further includes a crane with a crane chassis and traveling beams on the two beams, with the two ends of the crane chassis hinged to the two traveling beams respectively.

[0017] In one embodiment, the auxiliary outrigger includes a roller mechanism, a telescopic sleeve, a telescopic cylinder, and a heightening section. The roller mechanism is slidably mounted on the beam. The telescopic sleeve is connected to the roller mechanism. The heightening section is connected to the telescopic sleeve. The telescopic cylinder drives the telescopic sleeve to extend and retract.

[0018] A method for horizontal rotation of a bridge erecting machine, employing any one of the above-described bridge erecting machine horizontal rotation devices, characterized in that the horizontal rotation method includes the following steps:

[0019] The two sets of middle support legs are supported on the bridge deck and the two sets of auxiliary devices are unloaded and removed from the bridge deck. The two sets of middle support legs move laterally in opposite directions, causing the main beam to rotate. The adjustment mechanism adjusts the distance between the two middle support leg units to match the misalignment of the two beams.

[0020] Two sets of auxiliary devices are supported on the bridge deck and the middle support leg is unloaded and removed from the bridge deck. Then the middle support leg is rotated in the rotation direction of the main beam. The adjustment mechanism adjusts the distance between the two middle support leg units to match the angle change of the two middle support legs.

[0021] Repeat the above steps in sequence to rotate the main beam and the middle support leg alternately horizontally until the main beam is rotated to the predetermined position.

[0022] The above-mentioned horizontal rotation device and method for bridge erecting machines have at least the following advantages:

[0023] The two sets of middle support legs move laterally in opposite directions. Since the middle support leg units are hinged to the main beam, they can drive the main beam to rotate. During the rotation of the main beam, the two beams of the main beam misalign. Therefore, the adjusting mechanism adjusts the spacing between the two middle support leg units to accommodate the change in distance after the misalignment of the two main beams. Then, the two sets of auxiliary support legs support the bridge deck, and the two sets of middle support legs are unloaded and detached from the bridge deck, causing the two middle support leg units to slide in opposite directions on the main beam, rotating the middle support legs along the rotation direction of the main beam. Simultaneously, the adjusting mechanism adjusts the spacing between the two middle support leg units. The main beam and middle support legs rotate horizontally alternately until the main beam is rotated to the predetermined position. The bridge erecting machine can rotate horizontally, thus facilitating site relocation and making it suitable for situations where precast beams and cap beams intersect at an angle. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0025] Figure 1 This is a schematic diagram of the horizontal rotation device of a bridge erecting machine in one embodiment;

[0026] Figure 2 for Figure 1 A schematic diagram of the structure of the middle support leg;

[0027] Figure 3 for Figure 1 A schematic diagram showing the two beams of the central main beam being horizontally hinged to the main beam;

[0028] Figure 4 for Figure 2 Schematic diagram of the middle support leg unit;

[0029] Figure 5 for Figure 4 A partial structural schematic diagram of the middle support leg unit shown;

[0030] Figure 6 for Figure 1 A schematic diagram of the structure of the auxiliary support leg;

[0031] Figure 7 This is a schematic diagram showing the hinged connection between the crane base and the traveling beam.

[0032] Figure 8 This is a side view showing the hinged connection between the crane base and the traveling beam.

[0033] Figure 9 This is a flowchart of a method for horizontal rotation of a bridge erecting machine in one embodiment;

[0034] Figure 10 A schematic diagram showing the rotation of the middle support leg trolley;

[0035] Figure 11 for Figure 1 The diagram shows the horizontal rotation device station of the bridge erecting machine located on the bridge.

[0036] Figure 12 This is a schematic diagram showing the arrangement of the central support legs and auxiliary devices before the main beam rotates.

[0037] Figure 13 This is a schematic diagram showing how the main beam rotates 22.5 degrees as the front and rear middle support legs move laterally in opposite directions.

[0038] Figure 14 This is a schematic diagram showing the front and rear middle support legs rotated horizontally by 45 degrees;

[0039] Figure 15 This is a schematic diagram showing how the front and rear middle support legs can reverse their lateral movement to drive the main beam to rotate 45 degrees.

[0040] Figure 16 This is a schematic diagram showing the front and rear middle support legs rotating horizontally by 45 degrees again;

[0041] Figure 17 This is a schematic diagram showing how the front and rear middle support legs can reverse their lateral movement to drive the main beam to rotate 45 degrees.

[0042] Figure 18 This is a schematic diagram showing the front and rear middle support legs rotating horizontally by 45 degrees again;

[0043] Figure 19 This is a schematic diagram showing how the front and rear middle support legs can reverse their lateral movement to drive the main beam to rotate 45 degrees.

[0044] Figure 20 This is a schematic diagram showing the front and rear middle support legs rotating horizontally by 45 degrees again;

[0045] Figure 21This is a schematic diagram showing how the front and rear middle support legs reverse their lateral movement to drive the main beam to rotate 22.5 degrees.

[0046] Figure label:

[0047] 10-Main beam, 12-Beam body, 121-First beam body, 122-Second beam body, 14-Main beam transverse brace, 16-Main beam horizontal hinge, 20-Middle support leg, 21-Middle support leg unit, 211-Hanging wheel mechanism, 212-Middle support leg trolley, 213-Horizontal hinge shaft, 214-Main body, 215-Sliding component, 216-Fixed part, 217-Moving part, 218-Lifting cylinder 22-Outrigger crossbeam, 23-Transverse cylinder, 241-Front middle outrigger, 242-Rear middle outrigger, 30-Auxiliary device, 32-Auxiliary outrigger, 321-Telescopic sleeve, 322-Telescopic cylinder, 323-Heightening section, 40-Transverse track, 50-Heavy crane, 52-Heavy crane chassis, 54-Traveling beam, 56-Heavy crane horizontal hinge, 60-Front outrigger, 70-Precast beam, 80-Cover beam. Detailed Implementation

[0048] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the invention; therefore, the invention is not limited to the specific embodiments disclosed below.

[0049] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0051] Please see Figure 1 One embodiment of the bridge erecting machine's horizontal rotation device includes a main beam 10, two sets of intermediate support legs 20, and two sets of auxiliary devices 30. The horizontal rotation of the bridge erecting machine is achieved through the alternating horizontal rotation of the main beam 10 and the intermediate support legs 20.

[0052] Please refer to the following: Figure 2 and Figure 3 In one embodiment, the main beam 10 includes two beam bodies 12 and a main beam cross brace 14, with both ends of the main beam cross brace 14 hinged to the two beam bodies 12 respectively. During rotation, the two beam bodies 12 will shift from rectangular to parallelogram structures, and the hinge between the main beam cross brace 14 and the beam bodies 12 can accommodate the mutual shifting of the two main beams 10. In one embodiment, the main beam cross brace 14 and the beam bodies 12 are hinged via a main beam horizontal pivot hinge 16.

[0053] Two sets of intermediate support legs 20 are spaced apart on the main beam 10. The positions of the two sets of intermediate support legs 20 are adaptively adjusted to ensure that the intermediate support legs 20 can smoothly lift the main beam 10. In one embodiment, each set of intermediate support legs 20 includes two intermediate support leg units 21, a support leg crossbeam 22, and an adjustment mechanism. The two intermediate support leg units 21 are respectively hinged to the two beams 12, and the two intermediate support leg units 21 are slidably disposed on the support leg crossbeam 22. The adjustment mechanism is used to adjust the distance between the two intermediate support leg units 21.

[0054] Please refer to the following: Figure 4 Based on the above embodiments, the middle support leg unit 21 further includes a wheel mechanism 211, a middle support leg trolley 212, and a horizontal hinge device 213. The wheel mechanism 211 is slidably mounted on the beam 12, allowing the middle support leg unit 21 to slide along the main beam 10. The middle support leg trolley 212 is slidably disposed on the support leg crossbeam 22, and the middle support leg trolley 212 and the wheel mechanism 211 are rotatably connected via the horizontal hinge device 213. Because the middle support leg trolley 212 and the wheel mechanism 211 are connected via the horizontal hinge device 213, relative rotation between the middle support leg trolley 212 and the beam 12 can be achieved.

[0055] Based on the above embodiments, the middle support leg trolley 212 further includes a main body 214 and a sliding member 215. The upper end of the main body 214 is connected to the horizontal hinge device 213, and the lower end of the main body 214 is equipped with the sliding member 215, which slides in contact with the support leg beam 22.

[0056] The sliding member 215 slides in contact with the support leg beam 22, facilitating the sliding of the middle support leg trolley 212 on the support leg beam 22. Specifically, the sliding member 215 can be a PTFE sliding plate. It is understood that in other embodiments, the sliding member 215 can also be other structures, as long as it facilitates the sliding of the middle support leg trolley 212 on the support leg beam 22.

[0057] In one embodiment, the support leg beam 22 is provided with mounting holes extending axially therefrom. The fasteners on the middle support leg trolley 212 pass through these mounting holes to secure the middle support leg trolley 212 to the support leg beam 22, ensuring the stability of the main beam 10 during horizontal rotation. Simultaneously, the mounting holes are elongated, providing mounting positions for the middle support leg trolley 212 at different locations on the support leg beam 22. Furthermore, the top of the support leg beam 22 is also provided with a limiting plate or limiting slot to prevent the middle support leg trolley 212 from sliding off the support leg beam 22, ensuring safety.

[0058] In one embodiment, to achieve the lifting and lowering of the middle outrigger 20, the main body 214 includes a fixed part 216, a movable part 217, and a lifting cylinder 218. A sliding member 215 is installed at the bottom of the fixed part 216. After the fixed part 216 slides to a preset position, it can be fixed to the outrigger beam 22 by screws or other fasteners. The movable part 217 at least partially overlaps with the fixed part 216. The two ends of the lifting cylinder 218 are connected to the outrigger beam 22 and the movable part 217, respectively. The lifting cylinder 218 activates the movable part 217 to lift and lower relative to the fixed part 216, thereby extending and retracting the main body 214, and thus lifting and lowering the entire middle outrigger unit 21.

[0059] Please refer to it again. Figure 2 In one embodiment, the adjustment mechanism includes two sets of lateral movement cylinders 23, which are mounted on the support leg beam 22 and connected to two sets of middle support leg units 21. The lateral movement cylinders 23 drive the middle support leg units 21 to slide on the support leg beam 22. It is understood that in other embodiments, the adjustment mechanism can have other structures; for example, the adjustment mechanism may include only one cylinder, with both ends of the cylinder connected to two middle support leg units 21 respectively. The extension and retraction of the cylinder enables the movement of the two middle support leg units 21 on the support leg beam 22.

[0060] Please see Figure 1 and Figure 6 Two sets of auxiliary devices 30 are spaced apart on the main beam 10. Each set of auxiliary devices 30 includes two auxiliary legs 32, which are installed on the two beam bodies 12, i.e., two auxiliary legs 32 are installed at the front and rear of each beam body 12. The two auxiliary devices 30 and the two sets of intermediate legs 20 are used to alternately support the main beam 10 on the bridge deck to lift the main beam 10.

[0061] Specifically, when the middle support leg 20 is supported on the bridge deck, the auxiliary device 30 is unloaded and detached from the bridge deck, at which point the main beam 10 rotates horizontally; when the auxiliary device 30 is supported on the bridge deck, the middle support leg 20 is unloaded and detached from the bridge deck, and the middle support leg 20 rotates in the direction of rotation of the main beam 10. The auxiliary device 30 and the middle support leg 20 provide alternating support, thereby achieving alternating horizontal rotation of the main beam 10 and the middle support leg 20.

[0062] In one embodiment, the auxiliary support leg 32 includes a pulley mechanism 211, a telescopic sleeve 321, a telescopic cylinder 322, and a heightening section 323. The pulley mechanism 211 is slidably mounted on the beam 12. When the auxiliary support leg 32 is under load, it must be bolted to the beam 12. The telescopic sleeve 321 is connected to the pulley mechanism 211, and the heightening section 323 is connected to the telescopic sleeve 321. The telescopic cylinder 322 drives the telescopic sleeve 321 to extend and retract, thereby adjusting the height of the auxiliary support leg 32. If the adjustment range is exceeded, the height of the heightening section 323 can be increased to accommodate changes in the height of the main beam 10.

[0063] In one embodiment, to facilitate the lateral movement of the middle support leg 20 and achieve the horizontal rotation of the main beam 10, the horizontal rotation device of the bridge erecting machine further includes a transverse track 40. The transverse track 40 is arranged on the bridge deck, and one transverse track 40 is arranged for each group of middle support legs 20. The bottom of the support leg crossbeam 22 is provided with traveling wheels, which move along the transverse track 40 so that the middle support leg 20 can move along the transverse track 40, thereby achieving the lateral movement of the middle support leg 20.

[0064] Please refer to the following: Figure 7 and Figure 8 In one embodiment, the horizontal rotation device of the bridge erecting machine also includes a crane 50. Since the distance between the two beams 12 may shorten during the rotation of the main beam 10, the crane 50 should be able to match the change in the distance between the beams 12. Therefore, the crane 50 has a crane chassis 52, and traveling beams 54 are provided on the two beams 12. The two ends of the crane chassis 52 are hinged to the two traveling beams 54. Since the crane chassis 52 and the traveling beams 54 are not rigidly connected but hinged, the traveling beams 54 can rotate with the main beam 10 while the crane chassis 52 remains stationary. Specifically, the crane chassis 52 and the traveling beams 54 are hinged via a crane horizontal pivot 56.

[0065] Please see Figure 9 The present invention also provides a method for horizontal rotation of a bridge erecting machine, which employs the aforementioned horizontal rotation device for the bridge erecting machine. Specifically, the horizontal rotation method includes the following steps:

[0066] Step S110: Support the two sets of middle support legs 20 on the bridge deck and unload the two sets of auxiliary devices 30 from the bridge deck. Move the two sets of middle support legs 20 laterally in opposite directions to drive the main beam 10 to rotate. Adjust the distance between the two middle support leg units 21 to match the misalignment of the two beams 12.

[0067] Specifically, after the bridge erecting machine is erected, before horizontal rotation, the machine needs to move back half a span to position the two sets of middle support legs 20 at the mid-span. The position of the bridge erecting machine is then adjusted so that its center coincides with the center of the pier cap beam 80. At this point, the weight of the bridge erecting machine is evenly distributed across the two spans, ensuring the safety of the bridge structure.

[0068] Then, the overhead crane 50 moves between the two sets of middle outriggers 20 to ensure the stability of the entire machine. The two sets of auxiliary devices 30 move to the rear of the two sets of middle outriggers 20 respectively and are detached from the bridge and are in an unloaded state. The front outrigger 60 retracts to its shortest length and remains detached from the bridge surface in an unloaded state. The entire machine is supported by the two sets of middle outriggers 20.

[0069] Finally, one set of middle support legs 20 moves laterally to the left along the transverse track 40, and the other set of middle support legs 20 moves laterally to the right along the transverse track 40. At the same time, the middle support leg trolley 212 drives one beam 12 to move forward and drives the other beam 12 to move backward. The two beams 12 are staggered relative to each other. The transverse hydraulic cylinder 23 pushes the middle support leg trolley 212 to slide on the support leg crossbeam 22, adjusting the distance between the two middle support leg units 21 to adapt to the angle change of the main beam 10.

[0070] Step S120: The two sets of auxiliary devices 30 are supported on the bridge deck and the middle support leg 20 is unloaded and removed from the bridge deck. Then, the middle support leg 20 is rotated in the rotation direction of the main beam 10. The adjustment mechanism adjusts the distance between the two middle support leg units 21 to match the angle change of the middle support leg 20.

[0071] Specifically, the positions of the two sets of auxiliary devices 30 are adjusted, and then the telescopic cylinders 322 of the auxiliary outriggers 32 extend to lift the main beam 10, unload the two sets of middle outriggers 20 and detach them from the bridge deck. The middle outriggers 20 and the transverse track 40 are connected together, and the transverse track 40 can move with the middle outriggers 20.

[0072] Please see Figure 10 Then, the pulley mechanism 211 of the middle support leg unit 21 causes the middle support leg unit 21 to move along the beam 12. The two middle support leg units 21 of the same middle support leg 20 move in opposite directions on the beam 12. For example, one middle support leg unit 21 moves forward along the beam 12, and the other middle support leg unit 21 moves backward along the beam 12, realizing the horizontal rotation of the middle support leg 20. Furthermore, the rotation direction of the middle support leg 20 is the same as the rotation direction of the main beam 10. To facilitate the subsequent horizontal rotation of the main beam 10, the angle of horizontal rotation of the middle support leg 20 should be greater than the angle of horizontal rotation of the main beam 10. For example, the angle of horizontal rotation of the middle support leg 20 is twice the angle of horizontal rotation of the main beam 10.

[0073] Step S130: Repeat the above steps in sequence to make the main beam 10 and the middle support leg 20 rotate horizontally alternately until the main beam 10 rotates to the predetermined position.

[0074] Specifically, two sets of auxiliary devices 30 and two sets of central support legs 20 alternately support the bridge deck, thereby alternately lifting the main beam 10 so that the main beam 10 and the central support legs 20 can rotate alternately until the main beam 10 rotates to the predetermined position. After the main beam 10 rotates into place, the bridge erecting machine can then be transferred to another location or the cap beam 80 and the precast beam 70 can be erected at an oblique angle.

[0075] The above-mentioned horizontal rotation device and method for bridge erecting machine enable the bridge erecting machine to rotate horizontally, thus facilitating site relocation and making it suitable for the oblique intersection of precast beams 70 and cap beams 80.

[0076] The present invention will be further described in detail below through specific embodiments. For ease of understanding and description, the two beams 12 are divided into a first beam 121 and a second beam 122, and the two sets of middle support legs 20 are divided into front middle support legs 241 and rear middle support legs 242. The rear support legs of the bridge erecting machine itself are considered as a set of auxiliary devices 30.

[0077] Please see Figure 11 The first step: After erecting the last span (4# to 5#), the bridge erecting machine needs to move back half a span, positioning the two sets of 20-foot central support legs at the mid-span of the bridge. Adjust the position of the bridge erecting machine so that its center coincides with the center of the cap beam 80 of pier 3#. At this point, the weight of the bridge erecting machine is evenly distributed across the two spans, 2# to 3# and 3# to 4#, ensuring the structural safety of the bridge.

[0078] Please see Figure 11 The second step: The overhead crane 50 moves between the two middle outriggers 20 to ensure the stability of the entire machine. One auxiliary device 30 moves to the rear side of the front middle outrigger 241, detaching from the bridge surface and entering an unloaded state; the other auxiliary device 30 moves to the rear side of the rear middle outrigger 242, detaching from the bridge surface and entering an unloaded state. The front outrigger 60 retracts to its shortest length and remains detached from the bridge surface, in an unloaded state. The entire machine is supported by the front middle outrigger 241 and the rear middle outrigger 242.

[0079] Please see Figure 14 The third step involves the front middle support leg 241 moving laterally to the left along the transverse track 40, and the rear middle support leg 242 moving laterally to the right along the transverse track 40. Simultaneously, the middle support leg trolley 212 drives the first beam 121 forward and the second beam 122 backward. The transverse cylinder 23 pushes the middle support leg unit 21 to move on the support leg crossbeam 22, adjusting the distance between the two middle support leg units 21 to accommodate changes in the angle of the main beam 10. This continues until the main beam 10 rotates horizontally counterclockwise by 22.5 degrees.

[0080] Please see Figure 14Step 4: Adjust the positions of the two sets of auxiliary devices 30 so that the auxiliary legs 32 of the two sets of auxiliary devices 30 lift the main beam 10, unload the two sets of middle support legs 20, and move the transverse track 40 together to detach from the bridge deck. Operate the hanging wheel mechanism 211 of the front middle support leg 241 to move the left middle support leg unit 21 of the front middle support leg 241 backward along the first beam 121, and the right middle support leg unit 21 of the front middle support leg 241 forward along the second beam 122. Operate the hanging wheel mechanism 211 of the rear middle support leg 242 to move the left middle support leg unit 21 of the rear middle support leg 242 backward along the first main beam 10, and the right middle support leg unit 21 of the rear middle support leg 242 forward along the second beam 122. Continue until the two middle support legs 20 and the transverse track 40 rotate horizontally counterclockwise by 45 degrees.

[0081] Please see Figure 15 Step 5: Extend the lifting cylinders 218 of the front and rear middle support legs 241 and 242 to lift the main beam 10, unload the auxiliary support legs 32 of the two sets of auxiliary devices 30, and detach them from the bridge deck. The front middle support leg 241 moves laterally to the left along the transverse track 40, and the rear middle support leg 242 moves laterally to the right along the transverse track 40. At the same time, the middle support leg trolley 212 drives the first beam 121 to move forward and the second beam 122 to move backward. The transverse cylinder 23 pushes the middle support leg unit 21 to move on the support leg crossbeam 22, adjusting the distance between the two middle support leg units 21 to adapt to the angle change of the main beam 10. This continues until the main beam 10 rotates horizontally counterclockwise by 45 degrees (at this point, the main beam 10 has rotated a total of 67.5 degrees).

[0082] Please see Figure 16 Step 6: Adjust the positions of the two sets of auxiliary devices 30 so that the auxiliary legs 32 of the two sets of auxiliary devices 30 lift the main beam 10, unload the two sets of middle support legs 20, and move the transverse track 40 together to detach from the bridge deck. Operate the hanging wheel mechanism 211 of the front middle support leg 241 to move the left middle support leg unit 21 of the front middle support leg 241 backward along the first beam 121, and the right middle support leg unit 21 of the front middle support leg 241 forward along the second beam 122. Operate the hanging wheel mechanism 211 of the rear middle support leg 242 to move the left middle support leg unit 21 of the rear middle support leg 242 backward along the first main beam 10, and the right middle support leg unit 21 of the rear middle support leg 242 forward along the second beam 122. Until the two middle support legs 20 and the transverse track 40 rotate horizontally counterclockwise by 45 degrees (at this time, the middle support legs 20 have rotated a total of 90 degrees).

[0083] Please see Figure 17Step 7: Extend the lifting cylinders 218 of the front and rear middle support legs 241 and 242 to lift the main beam 10, unload the auxiliary support legs 32 of the two sets of auxiliary devices 30, and detach them from the bridge deck. The front middle support leg 241 moves laterally to the left along the lateral track 40, and the rear middle support leg 242 moves laterally to the right along the lateral track 40. At the same time, the middle support leg trolley 212 drives the first beam 121 to move forward and the second beam 122 to move backward. The lateral cylinder 23 pushes the middle support leg unit 21 to move on the support leg crossbeam 22, adjusting the distance between the two middle support leg units 21 to adapt to the angle change of the main beam 10. This continues until the main beam 10 rotates horizontally counterclockwise by 45 degrees (at this point, the main beam 10 has rotated a total of 112.5 degrees). During this rotation range, especially when the main beam 10 rotates to 90°, the bridge erecting machine is positioned laterally on the bridge's cap beam 80. At this time, the self-weight load is most concentrated, but because it is positioned on the cap beam 80, the safety of the bridge structure can be ensured.

[0084] Please see Figure 18 Step 8: Adjust the positions of the two sets of auxiliary devices 30 so that the auxiliary legs 32 of the two sets of auxiliary devices 30 lift the main beam 10, unload the two sets of middle support legs 20, and drive the transverse track 40 together to detach from the bridge deck. Operate the hanging wheel mechanism 211 of the front middle support leg 241 to move the left middle support leg unit 21 of the front middle support leg 241 backward along the first beam 121, and the right middle support leg unit 21 of the front middle support leg 241 forward along the second beam 122. Operate the hanging wheel mechanism 211 of the rear middle support leg 242 to move the left middle support leg unit 21 of the rear middle support leg 242 backward along the first main beam 10, and the right middle support leg unit 21 of the rear middle support leg 242 forward along the second beam 122. Until the two middle support legs 20 and the transverse track 40 rotate horizontally counterclockwise by 45 degrees (at this time, the middle support legs 20 have rotated a total of 135 degrees).

[0085] Please see Figure 19 Step 9: Extend the lifting cylinders 218 of the front and rear middle support legs 241 and 242 to lift the main beam 10, unload the auxiliary support legs 32 of the two sets of auxiliary devices 30, and detach them from the bridge deck. The front middle support leg 241 moves laterally to the left along the transverse track 40, and the rear middle support leg 242 moves laterally to the right along the transverse track 40. At the same time, the middle support leg trolley 212 drives the first beam 121 to move forward and the second beam 122 to move backward. The transverse cylinder 23 pushes the middle support leg unit 21 to move on the support leg crossbeam 22, adjusting the distance between the two middle support leg units 21 to adapt to the angle change of the main beam 10. This continues until the main beam 10 rotates horizontally counterclockwise by 45 degrees (at this point, the main beam 10 has rotated a total of 157.5 degrees).

[0086] Please see Figure 20Step 10: Adjust the positions of the two sets of auxiliary devices 30 so that the auxiliary legs 32 of the two sets of auxiliary devices 30 lift the main beam 10, unload the two sets of middle support legs 20, and move the transverse track 40 together to detach from the bridge deck. Operate the hanging wheel mechanism 211 of the front middle support leg 241 to move the left middle support leg unit 21 of the front middle support leg 241 backward along the first beam 121, and the right middle support leg unit 21 of the front middle support leg 241 forward along the second beam 122. Operate the hanging wheel mechanism 211 of the rear middle support leg 242 to move the left middle support leg unit 21 of the rear middle support leg 242 backward along the first main beam 10, and the right middle support leg unit 21 of the rear middle support leg 242 forward along the second beam 122. Continue until the two middle support legs 20 and the transverse track 40 rotate horizontally counterclockwise by 45 degrees (at this time, the middle support legs 20 have rotated a total of 180 degrees).

[0087] Please see Figure 21 Step 11: Extend the lifting cylinders 218 of the front and rear middle support legs 241 and 242 to lift the main beam 10, unload the auxiliary support legs 32 of the two sets of auxiliary devices 30, and detach them from the bridge deck. The front middle support leg 241 moves laterally to the left along the transverse track 40, and the rear middle support leg 242 moves laterally to the right along the transverse track 40. At the same time, the middle support leg trolley 212 drives the first beam 121 to move forward and the second beam 122 to move backward. The transverse cylinder 23 pushes the middle support leg unit 21 to move on the support leg crossbeam 22, adjusting the distance between the two middle support leg units 21 to adapt to the angle change of the main beam 10. This continues until the main beam 10 rotates horizontally counterclockwise by 22.5 degrees (at this point, the main beam 10 has rotated a total of 180°). This completes the 180-degree horizontal turn of the bridge erecting machine.

[0088] It should be understood that, in this embodiment, the rotation angle of the main beam 10 and the middle support leg 20 is not limited to 22.5° and 45° each time. The rotation angle depends on the maximum horizontal deflection angle designed for the bridge erecting machine's rotating mechanism and the actual operational needs, and can be selected according to actual requirements.

[0089] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A bridge girder launching machine horizontal swivel device, characterized in that, include: The main beam includes two beam bodies and a main beam transverse link hinged to the two beam bodies; Two sets of central support legs are spaced apart on the main beam. The two sets of central support legs move laterally in opposite directions, causing the main beam to rotate. Each set of central support legs includes two central support leg units, a support leg crossbeam, and an adjustment mechanism. The two central support leg units of the same central support leg move in opposite directions on the beam; one central support leg unit moves forward along the beam, and the other central support leg unit moves backward along the beam, achieving horizontal rotation of the central support leg. The two central support leg units are hinged to the two beams respectively, and the two central support leg units are slidably mounted on the support leg crossbeam. The adjustment mechanism is used to adjust the distance between the two central support leg units. Two sets of auxiliary devices are spaced apart on the main beam. Each set of auxiliary devices includes two auxiliary legs, which are respectively installed on two beams. The two sets of auxiliary devices and the two sets of middle legs are used to alternately support the bridge deck to lift the main beam. When the auxiliary devices are supported on the bridge deck, the middle legs are unloaded and detached from the bridge deck, and the middle legs rotate in the direction of rotation of the main beam.

2. The bridging machine horizontal swivel apparatus of claim 1, wherein, The middle support leg unit includes a wheel mechanism, a middle support leg trolley, and a horizontal hinge device. The wheel mechanism is slidably mounted on the beam, and the middle support leg trolley is slidably mounted on the support leg crossbeam. The middle support leg trolley and the wheel mechanism are rotatably connected through the horizontal hinge device.

3. The bridging machine horizontal swivel apparatus of claim 2, wherein, The support leg beam is provided with a strip-shaped mounting hole extending along its axial direction, and the fixing member on the middle support leg trolley passes through the mounting hole to fix the middle support leg trolley on the support leg beam.

4. The horizontal rotation device for a bridge erecting machine according to claim 2, characterized in that, The middle support leg trolley includes a main body and a sliding component. The upper end of the main body is connected to the horizontal hinge device, and the sliding component is installed at the lower end of the main body. The sliding component is in sliding contact with the support leg crossbeam.

5. The horizontal rotation device for a bridge erecting machine according to claim 4, characterized in that, The main body includes a fixed part, a movable part, and a lifting cylinder. The sliding member is installed at the bottom of the fixed part. The movable part overlaps the fixed part at least partially. The two ends of the lifting cylinder are connected to the support leg beam and the movable part. The lifting cylinder drives the movable part to rise and fall relative to the fixed part.

6. The horizontal rotation device for a bridge erecting machine according to claim 1, characterized in that, The adjustment mechanism includes two sets of transverse hydraulic cylinders, which are mounted on the support leg crossbeam. The two sets of transverse hydraulic cylinders are respectively connected to the two middle support leg units. The transverse hydraulic cylinders are used to drive the middle support leg units to slide on the support leg crossbeam.

7. The horizontal rotation device for a bridge erecting machine according to claim 1, characterized in that, It also includes a traverse track for placement on the bridge deck, and the bottom of the outrigger beam is provided with a traveling wheel that moves along the traverse track.

8. The horizontal rotation device for a bridge erecting machine according to claim 1, characterized in that, It also includes an overhead crane, which has an overhead crane chassis and two traveling beams on the two beams. The two ends of the overhead crane chassis are respectively hinged to the two traveling beams.

9. The horizontal rotation device for a bridge erecting machine according to claim 1, characterized in that, The auxiliary outrigger includes a hanging wheel mechanism, a telescopic sleeve, a telescopic cylinder, and a heightening section. The hanging wheel mechanism is slidably mounted on the beam. The telescopic sleeve is connected to the hanging wheel mechanism, and the heightening section is connected to the telescopic sleeve. The telescopic cylinder drives the telescopic sleeve to extend and retract.

10. A method for horizontal rotation of a bridge erecting machine, employing the horizontal rotation device for a bridge erecting machine as described in any one of claims 1-9, characterized in that, This horizontal rotation method includes the following steps: The two sets of middle support legs are supported on the bridge deck and the two sets of auxiliary devices are unloaded and removed from the bridge deck. The two sets of middle support legs move laterally in opposite directions, causing the main beam to rotate. The adjustment mechanism adjusts the distance between the two middle support leg units to match the misalignment of the two beams. Two sets of auxiliary devices are supported on the bridge deck and the middle support leg is unloaded and removed from the bridge deck. Then the middle support leg is rotated in the rotation direction of the main beam. The adjustment mechanism adjusts the distance between the two middle support leg units to match the angle change of the two middle support legs. Repeat the above steps in sequence to rotate the main beam and the middle support leg alternately horizontally until the main beam is rotated to the predetermined position.

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