High-speed railway box girder assembling and replacing equipment and operation method thereof

Abstract

The application discloses a high-speed railway box girder erecting and replacing equipment and an operation method thereof, and belongs to the technical field of high-speed railway bridge construction. The high-speed railway box girder erecting and replacing equipment comprises two movable erecting table positions, each movable erecting table position comprising a cross beam, two jacking mechanisms and two movement mechanisms; the two jacking mechanisms are symmetrically arranged at the two ends of the cross beam in the length direction of the cross beam and are located below the cross beam; and the two movement mechanisms are arranged at the outer sides of the two jacking mechanisms. The high-speed railway box girder erecting and replacing equipment is simple in structure, flexible in movement and not limited by use scenes. The equipment can be combined with a first generation single-door single-beam type beam carrying machine to perform erecting operation on a new generation low-position and super-low-position beam carrying vehicle, effectively activates old equipment, improves the utilization rate of the old equipment and reduces the cost of equipment purchase of enterprises. Meanwhile, the high-speed railway box girder erecting and replacing equipment and the erecting and replacing method effectively improve the beam carrying construction efficiency at a very low equipment cost, and are helpful to the laying efficiency of the high-speed railway box girder.

Description

Technical Field

[0001] This invention relates to equipment and methods for loading and replacing box girders for high-speed railways, belonging to the field of high-speed railway bridge construction technology. Background Technology

[0002] During the erection of high-speed railway box girders, the loading process involves transporting the finished box girders from the beam-making yard to a transport vehicle, which then transports them to the bridge construction site. Traditional box girder transport machines are single-beam, single-gantry type. Due to structural and operational limitations, these machines were only suitable for loading 32-meter box girders using first-generation transport vehicles. With the upgrading of new-generation transport vehicles, low-position and ultra-low-position transport vehicles have gradually replaced the older models. Due to design requirements, these low-position and ultra-low-position transport vehicles, while maintaining the same load-bearing capacity, have reduced height and increased length, typically 42-47 meters. This makes it impossible for the original single-beam, single-gantry transport machines to traverse the new-generation transport vehicles for loading operations. Furthermore, the increased transport distance during box girder transport leads to longer round-trip times for the transport vehicles, reducing construction efficiency. The large size, excessive width, and excessive length of the girder transport vehicle make it unsuitable for long-distance movement, and the difficulty of passing two girder transport vehicles during transportation further reduces the efficiency of box girder erection. Therefore, there is a need for an auxiliary device for transferring box girders from the girder transport machine to the girder transport vehicle.

[0003] CN115058975, "Box Girder Loading Equipment and Method," discloses box girder loading equipment including a loading platform, a loading trolley, and a track, with the loading trolley and loading platform spanning the track. The loading method involves aligning the girder transport vehicle with the loading platform and loading trolley (along the length of the box girder). A lifting device on the transport vehicle then supports one end of the box girder from the loading platform. The transport vehicle moves forward in a straight line along the length of the box girder, propelling it forward under the load of the loading trolley. Using this box girder loading equipment requires starting loading from the end of the box girder along its length, and the length of the transport vehicle and the box girder must be aligned. Furthermore, the transport vehicle must move in a straight line along the length of the box girder. Therefore, using this box girder loading equipment requires an operating space at least three times the length of the box girder, indicating a significant operational space requirement.

[0004] CN114922090 discloses a method and fixture for loading box girders, which includes a support system and a girder transport vehicle. When using this fixture, loading must begin from the end of the box girder along its length. The length of the girder transport vehicle must be aligned with the length of the box girder, and the transport vehicle must travel in a straight line along the length of the box girder. Similarly, it requires an operating space at least three times the length of the box girder, indicating a relatively large operating space requirement.

[0005] CN114955601 discloses a box girder transfer system that includes a girder loading trolley, a girder loading platform, a girder transport vehicle, a center baseline, and marking lines. Using this box girder transfer system for girder loading also requires starting loading from the end of the box girder along its length. The length direction of the girder transport vehicle must be collinear with the length direction of the box girder, and the girder transport vehicle must travel in a straight line along the length direction of the box girder. Similarly, it requires an operating space at least three times the length of the box girder, indicating a relatively large required operating space.

[0006] CN115125853 discloses a beam-loading fixture and method, comprising a support unit and piers. Using this box girder transfer system for beam loading requires a beam transport vehicle to enter beneath the support unit and the box girder, starting the loading process from below. After the box girder is completely transferred to the transport vehicle, the vehicle must continue to travel in a straight line until both the transport vehicle and the box girder are completely removed from the support unit. Therefore, this box girder transfer system requires at least three times the length of the box girder for operation, thus necessitating a large operating space. Summary of the Invention

[0007] The purpose of this invention is to overcome the technical problems of existing technologies, such as the need for large operating space and inflexible loading processes, and to provide a high-speed railway box girder loading and transshipment equipment and its operation method. This enables a single-girder, single-gantry girder transporter to transport box girders to low-position and ultra-low-position girder transport vehicles. Furthermore, this high-speed railway box girder loading and transshipment equipment requires less operating space and offers greater operational flexibility. By establishing a box girder transport transfer station with this equipment and supporting multiple girder transport vehicles for rapid box girder transport, construction efficiency is improved.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] The high-speed railway box girder loading and replacement equipment includes two mobile loading platforms: The mobile loading platforms include:

[0010] beam;

[0011] Two lifting mechanisms are located below the crossbeam and symmetrically arranged at both ends of the crossbeam; the distance between the two lifting mechanisms is greater than the width of the beam transport vehicle and the box girder; each lifting mechanism includes a base, a lifting drive mechanism, a liftable support, and a longitudinal beam; the longitudinal beam is located above the base and is statically connected to the crossbeam; the liftable support is statically connected between the base and the longitudinal beam; the lifting drive mechanism drives the longitudinal beam to move up and down; when the lifting mechanism is in the lifted state, the bottom of the crossbeam is higher than the highest position of the beam transport vehicle carrying the box girder;

[0012] Two motion mechanisms are respectively disposed on the outer sides of the two lifting mechanisms; the outer side of the lifting mechanism is the side opposite to the inner side of the lifting mechanism, and the inner side of the lifting mechanism refers to the side located between the two lifting mechanisms; each motion mechanism includes a rotating device, a wheel frame, a wheel, and a drive motor; the upper end of the rotating device is statically connected to the lifting mechanism and rises and falls with the lifting mechanism, the wheel frame is statically connected to the lower end of the rotating device, and the wheel is mounted on the wheel frame; the drive motor drives the wheel to rotate; when the longitudinal beam descends to its lowest position, the bottom end of the base is higher than or level with the bottom end of the wheel;

[0013] According to some embodiments disclosed in this invention, the lifting drive mechanism includes an oil pump and an oil cylinder; the bottom of the oil cylinder is statically connected to the base, and the top of the oil cylinder is statically connected to the longitudinal beam; the oil pump provides power to the oil cylinder.

[0014] According to some embodiments disclosed in this invention, the hydraulic cylinder includes a first hydraulic cylinder and a second hydraulic cylinder; the first hydraulic cylinder and the second hydraulic cylinder are respectively located at both ends of the base in the length direction.

[0015] According to some embodiments disclosed in this invention, the oil pump is statically connected to the end face of the crossbeam.

[0016] According to some embodiments disclosed in this invention, the lifting support includes a column, a sleeve, and a fixing pin; the bottom end of the column is statically connected to the base, the top end of the sleeve is statically connected to the longitudinal beam, and the column and the sleeve are connected by a sliding joint; the column is provided with an array of pin holes, and the fixing pin is inserted into the pin holes.

[0017] According to some embodiments disclosed in this invention, the motion mechanism further includes a half-shaft and a transmission device; one end of the transmission device is connected to the wheel, and the other end is connected to the output end of the drive motor via the half-shaft.

[0018] According to some embodiments disclosed in this invention, the upper end of the rotary device is connected to the longitudinal beam.

[0019] The method for installing box girders, using the aforementioned high-speed railway box girder installation and replacement equipment, includes the following steps:

[0020] 1) The lifting mechanism of the two mobile beam loading platforms is in the lifting state; the beam transporter places the box girder on the two mobile beam loading platforms, so that both ends of the box girder are located on the crossbeams of the two mobile beam loading platforms respectively.

[0021] 2) The beam transport vehicle passes through the two mobile beam loading platforms, so that the two mobile beam loading platforms are located at the rear and front of the beam transport vehicle, respectively.

[0022] 3) The lifting mechanism of the two mobile beam loading platforms falls back down, so that the box girder is placed on the beam transport vehicle, the crossbeam is separated from the box girder, and the wheels touch the ground;

[0023] 4) Drive the mobile girder loading platform located at the rear of the girder transport vehicle away, and drive the mobile girder loading platform located at the front of the girder transport vehicle forward to between the box girder and the driver's seat of the girder transport vehicle.

[0024] 5) The lifting mechanism of the mobile beam loading platform located at the front of the beam transport vehicle rises until the bottom of its crossbeam is higher than the top of the driver's seat of the beam transport vehicle.

[0025] 6) The beam transport vehicle reverses and disengages from the mobile beam loading platform located at the front of the beam transport vehicle.

[0026] Before step 1), the two movable beam loading platforms need to be aligned so that the distance between the two movable beam loading platforms is slightly less than the length of the box girder.

[0027] The method for replacing box girders, using the aforementioned high-speed railway box girder installation and replacement equipment, includes the following steps:

[0028] 1) The mobile beam loading platform with the lifting mechanism in the lifting state is located between the driver's seat of the beam transport vehicle carrying the box girder and the box girder. Then the lifting mechanism of the mobile beam loading platform is lowered until the wheels touch the ground, and the mobile beam loading platform is driven to move to the front end of the box girder.

[0029] 2) Drive another movable girder loading platform to below the rear end of the box girder;

[0030] 3) The lifting mechanism of the two mobile beam loading platforms rises until the crossbeam contacts the bottom of the box girder, and continues to rise until the box girder is separated from the beam transport vehicle;

[0031] 4) The beam transport vehicle leaves the mobile beam loading platform.

[0032] The beneficial effects of this invention are:

[0033] When loading and transferring high-speed railway box girders using the equipment of this invention, the box girder is first placed on two mobile loading platforms. A girder transport vehicle then traverses the two platforms to transfer the box girder onto the transport vehicle. Next, the two mobile loading platforms move towards the front and rear of the transport vehicle, respectively, until they are removed. During the separation process between the transport vehicle and the mobile loading platforms, the transport vehicle does not need to move, nor does it need to move linearly along the length of the box girder. Therefore, there is no need for a space at one end of the mobile loading platform to accommodate the linear movement of the transport vehicle and the separation from the platform, thus significantly reducing the space required for girder loading.

[0034] When replacing box girders using the high-speed rail box girder loading and replacement equipment of this invention, the mobile loading platform moves to a position above the girder transport vehicle carrying the box girder, while the girder transport vehicle itself does not need to move. The size of the mobile loading platform is much smaller than the size of the girder transport vehicle, and the movement space required by the mobile loading platform is almost negligible compared to the movement space required by the girder transport vehicle. The girder transport vehicle only needs to be driven away when the box girder is located on the mobile loading platform; at this time, only the length of the girder transport vehicle is needed at one end of the mobile loading platform, thus greatly reducing the space required for girder loading.

[0035] Furthermore, the high-speed railway box girder loading and replacement equipment provided by this invention has a simple structure, is highly mobile, and is not limited by usage scenarios. Combined with the first-generation single-door, single-beam beam transporter, it can perform beam loading operations for new-generation low-position and ultra-low-position beam transport vehicles, effectively revitalizing older equipment, increasing its utilization rate, and reducing the cost of equipment purchases for enterprises. Simultaneously, this high-speed railway box girder loading and replacement equipment and its loading and replacement methods effectively improve beam transport construction efficiency with extremely low equipment costs, helping to accelerate the laying efficiency of high-speed railway box girders.

[0036] In this application, the term "beam transport vehicle" refers to a low-position beam transport vehicle or an ultra-low-position beam transport vehicle unless otherwise specified. Attached Figure Description

[0037] Figure 1 A three-dimensional structural schematic diagram of the high-speed railway box girder loading and replacement equipment provided in an embodiment of the present invention.

[0038] Figure 2 Another structural schematic diagram (front view) of the high-speed railway box girder mounting and replacement equipment provided in an embodiment of the present invention;

[0039] Figure 3 A schematic diagram of the beam loading and replacement equipment for high-speed railway box girders provided in an embodiment of the present invention;

[0040] Figure 4 A schematic diagram of the detachment of the beam transport vehicle from the high-speed railway box girder loading and replacement equipment provided in an embodiment of the present invention;

[0041] The components include: 1. mobile beam loading platform, 2. crossbeam, 3. lifting mechanism, 4. motion mechanism, 5. oil pump, 6. base, 7. first oil cylinder, 8. second oil cylinder, 9. liftable support, 10. longitudinal beam, 11. column, 12. sleeve, 13. fixing pin, 14. pin hole, 15. wheel frame, 16. drive motor, 17. slewing device, 18. wheel, 19. transmission device, 20. half shaft, 21. box girder, and 22. beam transport vehicle. Implementation

[0042] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0043] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0044] The high-speed railway box girder 21 loading and replacement equipment includes two movable loading platforms 1. Each movable loading platform 1 includes: a crossbeam 2, two lifting mechanisms 3 and two motion mechanisms 4. The two lifting mechanisms 3 are located below the crossbeam 2 and are symmetrically arranged at both ends of the crossbeam 2 in the length direction. The two motion mechanisms 4 are respectively arranged on the outside of the two lifting mechanisms 3.

[0045] like Figure 1 As shown. The crossbeam 2 is horizontally positioned, with its two ends along its length being the left and right ends, respectively. The length of the crossbeam 2 should be greater than the width of the box girder 21, and also greater than the width of the applicable low-position beam transport vehicle 22 or ultra-low-position beam transport vehicle 22. Two lifting mechanisms 3 are respectively positioned below the left and right ends of the crossbeam 2. The distance between the two lifting mechanisms 3 is greater than the width of the applicable low-position beam transport vehicle 22 or ultra-low-position beam transport vehicle 22 and the box girder 21. That is, the length of the crossbeam 2 located between the two lifting mechanisms 3 is greater than the width of the applicable low-position beam transport vehicle 22 or ultra-low-position beam transport vehicle 22 and the box girder 21, to ensure that the beam transport vehicle 22 carrying the box girder 21 can pass under the crossbeam 2 of the mobile beam loading platform 1 and between the two lifting mechanisms 3.

[0046] like Figure 1As shown. The lifting mechanism 3 includes a base 6, a lifting drive mechanism, a liftable support 9, and a longitudinal beam 10, arranged from top to bottom as follows: longitudinal beam 10, liftable support 9, and base 6. The liftable support 9 is statically connected between the longitudinal beam 10 and the base 6; that is, the top of the liftable support 9 is statically connected to the longitudinal beam 10, and the bottom of the liftable support 9 is statically connected to the base 6. Specifically, the top surface of the liftable support 9 is fixedly connected to the bottom surface of the longitudinal beam 10, and the bottom surface of the liftable support 9 is fixedly connected to the top surface of the base 6. The longitudinal beam 10 is statically connected to the crossbeam 2; specifically, the top surface of the longitudinal beam 10 is fixedly connected to the bottom surface of the crossbeam 2. The liftable support 9 can extend and retract vertically to drive the longitudinal beam 10 to move up and down, thereby driving the crossbeam 2 to move up and down, thus adjusting the height of the space below the crossbeam 2. When the lifting mechanism 3 is in the lifted state, the bottom of the crossbeam 2 is higher than the highest position of the beam transport vehicle 22 carrying the box beam 21.

[0047] like Figure 1 As shown. The height-adjustable support 9 may include a column 11, a sleeve 12, and a fixing pin 13; the sleeve 12 is located above the column 11, and the sleeve 12 and the column 11 are connected via a sliding joint; the top of the sleeve 12 is statically connected to the longitudinal beam 10, and the bottom of the column 11 is statically connected to the base 6. Specifically, the sleeve 12 may be a square tube, that is, the horizontal cross-section of the sleeve 12 is square; correspondingly, the column 11 is a square column, that is, the horizontal cross-section of the column 11 is square, and it has the same shape as the horizontal cross-section of the sleeve 12 but is slightly smaller in size. The column 11 is provided with an array of pin holes 14, and the fixing pin 13 is inserted into the pin holes 14. By inserting the fixing pin 13, the position of the sleeve 12 relative to the column 11 is limited and adjusted, thereby realizing the adjustment of the total height of the sleeve 12 and the column 11.

[0048] The function of the lifting drive mechanism is to provide driving force for the lifting and lowering of the liftable support 9. Any existing lifting drive mechanism capable of achieving this function can be used. Specifically, a hydraulic cylinder and a hydraulic pump 5 can be used as the lifting drive mechanism, with the hydraulic pump 5 providing power to the hydraulic cylinder. The bottom of the hydraulic cylinder is statically connected to the base 6, and the top of the hydraulic cylinder is statically connected to the longitudinal beam 10. More specifically, the bottom surface of the hydraulic cylinder is fixedly connected to the upper surface of the base 6, the top surface of the hydraulic cylinder is fixedly connected to the bottom surface of the longitudinal beam 10, and the hydraulic pump 5 is statically connected to the end face of the crossbeam 2. The number of hydraulic cylinders can be determined according to the actual working conditions. When multiple hydraulic cylinders are used, they can be evenly distributed around the liftable support 9. For example, they can be arranged as follows: Figure 1 As shown, two hydraulic cylinders are used; the two hydraulic cylinders are the first hydraulic cylinder 7 and the second hydraulic cylinder 8; the first hydraulic cylinder 7 and the second hydraulic cylinder 8 are located at both ends of the base 6 along its length, and are symmetrically distributed on both sides of the liftable bracket 9.

[0049] For ease of description, the lifting mechanism 3 is divided into inner and outer sides along the length of the crossbeam 2. The inner side of the lifting mechanism 3 refers to the side located between the two lifting mechanisms 3, such as... Figure 1 As shown, this refers to the right side of the left-end lifting mechanism 3 and the left side of the right-end lifting mechanism 3. The outer side of the lifting mechanism 3 is the opposite side to the inner side of the lifting mechanism 3, as shown... Figure 1 As shown, this refers to the left side of the left-end lifting mechanism 3 and the right side of the right-end lifting mechanism 3.

[0050] The two motion mechanisms 4 are respectively located on the outside of the two lifting mechanisms 3. For example... Figure 1 As shown, one motion mechanism 4 is located to the left of the left lifting mechanism 3, and the other motion mechanism 4 is located to the right of the right lifting mechanism 3.

[0051] The motion mechanism 4 includes a rotary device 17, a wheel frame 15, wheels 18, and a drive motor 16. Specifically, it can be as follows: Figure 1 , 2 As shown. The upper end of the slewing device 17 is statically connected to the lifting mechanism 3 and rises and falls with the lifting mechanism 3; the lower end of the slewing device 17 can rotate 360° in the horizontal plane. The upper end of the slewing device 17 is fixedly connected to the longitudinal beam 10. The slewing device 17 and the longitudinal beam 10 can be fixedly connected by a connector. The lower end of the slewing device 17 is statically connected to the wheel frame 15, for example, the bottom surface of the slewing device 17 is fixedly connected to the top surface of the wheel frame 15. The wheel frame 15 is equipped with a wheel 18; specifically, the lower end of the wheel frame 15 is equipped with a wheel 18, and the wheel 18 is hinged to the wheel frame 15. The drive motor 16 drives the wheel 18 to rotate; specifically, the output end of the drive motor 16 is connected to one end of the transmission device 19 through a half-shaft 20, and the other end of the transmission device 19 is connected to the wheel 18. Example

[0052] like Figure 1 ,like Figure 2 As shown, the high-speed railway box girder 21 loading and replacement equipment includes two mobile loading platforms 1; the mobile loading platform 1 includes a crossbeam 2, two lifting mechanisms 3, and two motion mechanisms 4.

[0053] like Figure 1 ,like Figure 2 As shown, lifting mechanisms 3 are symmetrically arranged at both ends of the crossbeam 2, and a motion mechanism 4 is fixedly connected to the outside of the lifting mechanism 3.

[0054] like Figure 1 ,like Figure 2As shown, the lifting mechanism 3 includes a base 6, a first hydraulic cylinder 7, a second hydraulic cylinder 8, a liftable support 9, and a longitudinal beam 10. The upper surface of the base 6 is fixedly connected to one end of the liftable support 9 at its center, and the other end of the liftable support 9 is fixedly connected to the bottom surface of the longitudinal beam 10. The outer sides of the upper surface of the base 6 are fixedly connected to the bottom of the first hydraulic cylinder 7 and the second hydraulic cylinder 8, respectively, and the tops of the first hydraulic cylinder 7 and the second hydraulic cylinder 8 are fixedly connected to the bottom surface of the longitudinal beam 10. The top surface of the longitudinal beam 10 is fixedly connected to the bottom surface of the crossbeam 2. The first hydraulic cylinder 7 and the second hydraulic cylinder 8 can perform the lifting operation of the crossbeam 2.

[0055] like Figure 1 ,like Figure 2 As shown, the liftable support 9 includes a column 11, a sleeve 12, and a fixing pin 13. The column 11 and the sleeve 12 are connected by a sliding joint. The column 11 is provided with an array of pin holes 14. The position of the sleeve 12 relative to the column 11 is limited by inserting the fixing pin 13. After the hydraulic cylinder lifts the crossbeam 2, the liftable support 9 can rigidly position the height of the crossbeam 2, preventing the hydraulic cylinder from overheating due to prolonged operation and causing safety accidents. An oil pump 5 is also fixedly connected to one side of the crossbeam 2, which provides power to the hydraulic cylinder of the lifting mechanism 3.

[0056] like Figure 1 ,like Figure 2 As shown, the motion mechanism 4 includes a wheel frame 15, a drive motor 16, a slewing device 17, wheels 18, and a transmission device 19. Wheels 18 are hinged to the bottom of the wheel frame 15, and the slewing device 17 is mounted on the upper end of the wheel frame 15. The upper end of the slewing device 17 is fixedly connected to the longitudinal beam 10 of the lifting mechanism 3. The drive motor 16 is also mounted on the wheel frame 15. The output end of the drive motor 16 is connected to one end of the transmission device 19 via a half-shaft 20, and the other end of the transmission device 19 is connected to the wheels 18. The slewing device 17 controls the direction of the wheel seats, enabling flexible movement of the movable beam loading platform 1.

[0057] The operation methods for installing and replacing equipment on the high-speed railway box girder 21 include the method for installing the box girder 21 and the method for replacing the box girder 21.

[0058] The method for assembling box girders 21 using high-speed railway box girder assembly and replacement equipment includes the following steps:

[0059] 1) Arrange two mobile beam loading platforms 1 in the beam loading site. The two mobile beam loading platforms 1 are located at both ends of the target position of the box girder 21. That is, the two mobile beam loading platforms 1 need to be aligned so that the distance between the two mobile beam loading platforms 1 is slightly less than the length of the box girder 21.

[0060] The lifting mechanism 3 of the two mobile beam loading platforms 1 is in the lifting state, the motion mechanism 4 is suspended in the air and the wheels 18 are off the ground; the beam transporter places the box girder 21 on the two mobile beam loading platforms 1, so that the two ends of the box girder 21 are respectively located on the crossbeams 2 of the two mobile beam loading platforms 1, and the beam transporter leaves the work station.

[0061] 2) The beam transport vehicle 22 passes through the two mobile beam loading platforms 1, so that the two mobile beam loading platforms 1 are located at the rear end and front end of the body of the beam transport vehicle 22 used to carry the box girder 21, respectively.

[0062] 3) The lifting mechanism 3 of the two mobile beam loading platforms 1 descends, causing the box girder 21 to fall onto the beam transport vehicle 22; the lifting mechanism 3 continues to descend until the crossbeam 2 detaches from the box girder 21 and the wheels 18 touch the ground; if Figure 3 As shown;

[0063] 4) Drive the movable beam loading platform 1 located at the rear end of the beam transport vehicle 22 away, so that the movable beam loading platform 1 is located to the side of the beam transport vehicle 22, or so that the movable beam loading platform 1 is located behind the beam transport vehicle 22, and the distance between the movable beam loading platform 1 and the rear end of the beam transport vehicle 22 is at least the length of the driver's seat of the beam transport vehicle 22; drive the movable beam loading platform 1 located at the front end of the beam transport vehicle 22 forward to between the box girder 21 and the driver's seat of the beam transport vehicle 22;

[0064] 5) The lifting mechanism 3 of the mobile beam loading platform 1 located at the front of the beam transport vehicle 22 rises to the bottom of its crossbeam 2, which is higher than the top of the driver's seat of the beam transport vehicle 22.

[0065] 6) The beam transport vehicle 22 reverses and disengages from the mobile beam loading platform 1 located at the front end of the beam transport vehicle 22; as shown Figure 4 As shown.

[0066] The method for replacing box girder 21 using high-speed railway box girder 21 mounting and replacement equipment includes the following steps:

[0067] 1) The beam transport vehicle 22 transports the box girder 21 to the transfer station, with the lifting mechanism 3 in the raised state, and the mobile beam loading platform 1 positioned between the driver's seat of the beam transport vehicle 22 carrying the box girder 21 and the box girder 21; specifically, the driver's seat of the beam transport vehicle 22 may pass across the mobile beam loading platform 1 with the lifting mechanism 3 in the raised state; then the lifting mechanism 3 of the mobile beam loading platform 1 is lowered until the wheels 18 touch the ground, driving the mobile beam loading platform 1 to move below the front end of the box girder 21; as... Figure 3 As shown;

[0068] 2) Drive another movable girder loading platform 1 to below the rear end of box girder 21; as Figure 3 As shown;

[0069] 3) The lifting mechanism 3 of the two mobile beam loading platforms 1 rises until the crossbeam 2 contacts the bottom of the box girder 21, and continues to rise until the box girder 21 is separated from the beam transport vehicle 22;

[0070] 4) The beam transport vehicle 22 leaves the mobile beam loading platform 1 and goes to the beam fabrication yard for re-loading beams; the beam transport vehicle 22, which is transported to the next transfer station or beam erection site, crosses the mobile beam loading platform 1 and performs the same beam loading operation as the beam loading yard.

[0071] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A method for assembling box girders, characterized in that, The system employs high-speed railway box girder loading and transshipment equipment, which includes two mobile loading platforms: Each mobile loading platform includes: beam; Two lifting mechanisms are located below the crossbeam and symmetrically arranged at both ends of the crossbeam; the distance between the two lifting mechanisms is greater than the width of the beam transport vehicle and the box girder; each lifting mechanism includes a base, a lifting drive mechanism, a liftable support, and a longitudinal beam; the longitudinal beam is located above the base and is statically connected to the crossbeam; the liftable support is statically connected between the base and the longitudinal beam; the lifting drive mechanism drives the longitudinal beam to move up and down; when the lifting mechanism is in the lifted state, the bottom of the crossbeam is higher than the highest position of the beam transport vehicle carrying the box girder; The liftable support includes a column, a sleeve, and a fixing pin; the bottom end of the column is statically connected to the base, the top end of the sleeve is statically connected to the longitudinal beam, and the column and the sleeve are connected by a sliding joint; the column is provided with an array of pin holes, and the fixing pin is inserted into the pin holes. Two motion mechanisms are respectively located on the outer sides of the two lifting mechanisms, with one motion mechanism located on the left side of the left lifting mechanism and the other on the right side of the right lifting mechanism. The outer side of the lifting mechanism is the opposite side to the inner side of the lifting mechanism, and the inner side of the lifting mechanism refers to the side located between the two lifting mechanisms. Each motion mechanism includes a rotating device, a wheel frame, a wheel, and a drive motor. The upper end of the rotating device is statically connected to the lifting mechanism and rises and falls with the lifting mechanism. The wheel frame is statically connected to the lower end of the rotating device, and the wheel is mounted on the wheel frame. The drive motor drives the wheel to rotate. When the longitudinal beam descends to its lowest position, the bottom end of the base is higher than or level with the bottom end of the wheel. The motion mechanism also includes a half-shaft and a transmission device; one end of the transmission device is connected to the wheel, and the other end is connected to the output end of the drive motor through the half-shaft. The method for installing box girders includes the following steps: 1) The lifting mechanism of the two mobile beam loading platforms is in the lifting state; the beam transporter places the box girder on the two mobile beam loading platforms, so that both ends of the box girder are located on the crossbeams of the two mobile beam loading platforms respectively. 2) The beam transport vehicle passes through the two mobile beam loading platforms, so that the two mobile beam loading platforms are located at the rear and front of the beam transport vehicle, respectively. 3) The lifting mechanism of the two mobile beam loading platforms falls back down, so that the box girder is placed on the beam transport vehicle, the crossbeam is separated from the box girder, and the wheels touch the ground; 4) Drive the mobile girder loading platform located at the rear of the girder transport vehicle away, and drive the mobile girder loading platform located at the front of the girder transport vehicle forward to between the box girder and the driver's seat of the girder transport vehicle. 5) The lifting mechanism of the mobile beam loading platform located at the front of the beam transport vehicle rises until the bottom of its crossbeam is higher than the top of the driver's seat of the beam transport vehicle. 6) The beam transport vehicle reverses and disengages from the mobile beam loading platform located at the front of the beam transport vehicle; The beam transport vehicle is either a low-position beam transport vehicle or an ultra-low-position beam transport vehicle.

2. The method for assembling a box girder according to claim 1, characterized in that, Before step 1), the two movable beam loading platforms need to be aligned so that the distance between the two movable beam loading platforms is slightly less than the length of the box girder.

3. The method for assembling box girders according to claim 1, characterized in that, The lifting drive mechanism includes an oil pump and an oil cylinder; the bottom of the oil cylinder is statically connected to the base, and the top of the oil cylinder is statically connected to the longitudinal beam; the oil pump provides power to the oil cylinder.

4. The method for assembling a box girder according to claim 3, characterized in that, The hydraulic cylinder includes a first hydraulic cylinder and a second hydraulic cylinder; the first hydraulic cylinder and the second hydraulic cylinder are respectively located at both ends of the base along its length.

5. The method for assembling a box girder according to claim 3, characterized in that, The oil pump is statically connected to the end face of the crossbeam.

6. The method for assembling a box girder according to claim 1, characterized in that, The upper end of the rotary device is connected to the longitudinal beam.

7. A method for replacing box girders with girder girders, characterized in that, The system employs high-speed railway box girder loading and transshipment equipment, which includes two mobile loading platforms: Each mobile loading platform includes: beam; Two lifting mechanisms are located below the crossbeam and symmetrically arranged at both ends of the crossbeam; the distance between the two lifting mechanisms is greater than the width of the beam transport vehicle and the box girder; each lifting mechanism includes a base, a lifting drive mechanism, a liftable support, and a longitudinal beam; the longitudinal beam is located above the base and is statically connected to the crossbeam; the liftable support is statically connected between the base and the longitudinal beam; the lifting drive mechanism drives the longitudinal beam to move up and down; when the lifting mechanism is in the lifted state, the bottom of the crossbeam is higher than the highest position of the beam transport vehicle carrying the box girder; The liftable support includes a column, a sleeve, and a fixing pin; the bottom end of the column is statically connected to the base, the top end of the sleeve is statically connected to the longitudinal beam, and the column and the sleeve are connected by a sliding joint; the column is provided with an array of pin holes, and the fixing pin is inserted into the pin holes. Two motion mechanisms are respectively located on the outer sides of the two lifting mechanisms, with one motion mechanism located on the left side of the left lifting mechanism and the other on the right side of the right lifting mechanism. The outer side of the lifting mechanism is the opposite side to the inner side of the lifting mechanism, and the inner side of the lifting mechanism refers to the side located between the two lifting mechanisms. Each motion mechanism includes a rotating device, a wheel frame, a wheel, and a drive motor. The upper end of the rotating device is statically connected to the lifting mechanism and rises and falls with the lifting mechanism. The wheel frame is statically connected to the lower end of the rotating device, and the wheel is mounted on the wheel frame. The drive motor drives the wheel to rotate. When the longitudinal beam descends to its lowest position, the bottom end of the base is higher than or level with the bottom end of the wheel. The motion mechanism also includes a half-shaft and a transmission device; one end of the transmission device is connected to the wheel, and the other end is connected to the output end of the drive motor through the half-shaft. The method for replacing box girders includes the following steps: 1) The mobile beam loading platform with the lifting mechanism in the lifting state is located between the driver's seat of the beam transport vehicle carrying the box girder and the box girder. Then the lifting mechanism of the mobile beam loading platform is lowered until the wheels touch the ground, and the mobile beam loading platform is driven to move to the front end of the box girder. 2) Drive another movable girder loading platform to below the rear end of the box girder; 3) The lifting mechanism of the two mobile beam loading platforms rises until the crossbeam contacts the bottom of the box girder, and continues to rise until the box girder is separated from the beam transport vehicle; 4) The beam transport vehicle leaves the mobile beam loading platform.

8. The method for replacing a box girder with a beam according to claim 7, characterized in that, The lifting drive mechanism includes an oil pump and an oil cylinder; the bottom of the oil cylinder is statically connected to the base, and the top of the oil cylinder is statically connected to the longitudinal beam; the oil pump provides power to the oil cylinder.

9. The method for replacing a box girder with a beam according to claim 8, characterized in that, The hydraulic cylinder includes a first hydraulic cylinder and a second hydraulic cylinder; the first hydraulic cylinder and the second hydraulic cylinder are respectively located at both ends of the base along its length.

10. The method for replacing a box girder according to claim 8, characterized in that, The oil pump is statically connected to the end face of the crossbeam; the upper end of the rotary device is connected to the longitudinal beam.

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