Double-layer flat car

Abstract

The utility model relates to the technical field of bridge construction, and provides a double-layer flatcar which comprises a transverse moving track and a longitudinal moving track and further comprises a lower flatcar connected to the transverse moving track in a sliding mode, a sliding rail used for being in butt joint with the longitudinal moving track is installed on the lower flatcar, and an upper flatcar used for placing a steel arch is connected to the sliding rail in a sliding mode. Through the arrangement of the double-layer structure of the lower flatcar and the upper flatcar, higher flexibility and space efficiency can be provided, and the steel arch transfer efficiency and the construction safety are improved.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, and more specifically, to a double-decker flatcar. Background Technology

[0002] In the construction of steel arch bridges or steel-concrete composite bridges, steel components are typically fabricated in a factory and then transported to the construction site for assembly. During assembly, it is usually necessary to erect support frames within the installation area, use cables to hoist the arch ribs onto a transport barge, and then use a floating crane on the water to lift the arch ribs from the transport barge to the assembly position. However, existing technologies are often limited by site conditions and the elevation of the arch abutments during the transfer and hoisting of the arch ribs, resulting in the cable hoisting points not being able to directly reach the corresponding installation segments. Utility Model Content

[0003] The purpose of this utility model is to provide a double-layer flatcar to solve the above-mentioned technical problems and to solve the problem of transporting and hoisting arch ribs under the constraints of site conditions and arch seat elevation.

[0004] This utility model is achieved through the following technical solution: a double-layer flatcar, including a transverse track and a longitudinal track, and a lower flatcar slidably connected to the transverse track. The lower flatcar is equipped with a slide rail for docking with the longitudinal track, and an upper flatcar for placing a steel arch is slidably connected to the slide rail. The longitudinal track is higher than the transverse track.

[0005] Furthermore, the lower flatcar is equipped with a lifting mechanism for lifting the upper flatcar off the slide rail.

[0006] Preferably, the lifting mechanism uses a wedge.

[0007] Furthermore, the lower flatcar is equipped with a positioning plate, and the positioning plate has positioning holes. The lower flatcar is fixed to the foundation by a pin passing through the positioning holes.

[0008] Furthermore, the slide rail and the longitudinal track are fitted with mortise and tenon joints.

[0009] Furthermore, the lower flatcar is moved by a winch, while the upper flatcar is driven by a motor.

[0010] Furthermore, the transverse rails, longitudinal rails, and slide rails are all made of channel steel or I-beams.

[0011] This utility model has at least the following advantages and beneficial effects: the double-layer structure of the lower flatcar and the upper flatcar provides greater flexibility and space efficiency, and improves the efficiency of steel arch transportation and construction safety. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 A structural schematic diagram of a double-layer flatbed cart provided by this utility model;

[0014] Figure 2 A side view of a double-decker flatcar provided by this utility model;

[0015] Figure 3 A bottom view of a double-decker flatbed cart provided by this utility model;

[0016] Figure 4 A schematic diagram illustrating the connection between the sliding rail and the longitudinal track in a double-layer flatcar provided by this utility model;

[0017] Icons: 11-Horizontal rail, 12-Longitudinal rail, 2-Lower flatcar, 21-Slide rail, 22-Lifting mechanism, 23-Positioning plate, 230-Positioning hole, 3-Upper flatcar. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] Example

[0021] like Figure 1-3As shown, this embodiment mainly discloses a double-layer flatcar, including a transverse track 11 and a longitudinal track 12, and a lower flatcar 2 slidably connected to the transverse track 11. A slide rail 21 for docking with the longitudinal track 12 is installed on the lower flatcar 2, and an upper flatcar 3 for placing a steel arch is slidably connected to the slide rail 21. The longitudinal track 12 is higher than the transverse track 11. Specifically, the transverse track 11 is laid along the riverbank on a hardened foundation, with one end located at the bottom of a pit excavated in the assembly yard, and the other end extending towards the trestle bridge to the vicinity of the longitudinal track 12. The longitudinal track 12 is laid forward along the bridge as the trestle bridge construction progresses, using the trestle bridge as a support platform. The transverse track 11 and the longitudinal track 12 are perpendicular to each other, and the longitudinal track 12 is higher than the transverse track 11, facilitating the docking and sliding operation of the upper flatcar 3. The ends of the transverse track 11 and the longitudinal track 12 are welded with steel sections to limit excessive sliding of the lower flatcar 2 and the upper flatcar 3. The lower flatcar 2 and the upper flatcar 3... Both structures are frame structures with roller-driven walking mechanisms. The lower flatcar 2 is moved by a winch, while the upper flatcar 3 is driven by a motor. During transport, the steel arch to be installed is first hoisted onto the flatcar using a gantry crane in the assembly yard. Then, the winch pulls the flatcar, moving the entire structure along the transverse track 11 until the longitudinal track 12 aligns with the slide rail 21, indicating that the flatcar has reached the trestle axis. The upper flatcar 3 is then moved from the slide rail 21 to the longitudinal track 12 by the motor until it reaches the end of the trestle. Next, the steel arch is hoisted to a certain height using a cable crane, and then the upper flatcar 3 is moved back to allow space for the steel arch to fall. Finally, the steel arch is smoothly lowered onto the transport ship for further construction, and the upper flatcar 3 moves back onto the lower flatcar 2. The double-layer structure of the lower flatcar 2 and upper flatcar 3 provides greater flexibility and space efficiency, reduces the number of hoisting operations, and improves the efficiency of steel arch transport and construction safety.

[0022] Furthermore, in a specific implementation, the lower flatcar 2 provided in this embodiment of the present invention is provided with a lifting mechanism 22 for lifting the upper flatcar 3 off the slide rail 21. Preferably, the lifting mechanism 22 adopts a wedge; specifically, the wedge can be evenly distributed at multiple positions between the lower flatcar 2 and the upper flatcar 3. The wedge can adopt existing technology and is usually composed of an upper support, a lower support, a left support, and a right support. The cross-section of these supports is an isosceles trapezoid. The upper support is fastened to the lower support, and the left support is fastened to the right support. By adjusting the wedge-shaped mating position of each support, the upper flatcar 3 can be lifted and lowered. When the lower flatcar 2 slides on the transverse track 11, the lifting mechanism 22 lifts the upper flatcar 3, causing it to disengage from the slide rail 21. When the slide rail 21 reaches the docking position, the lifting mechanism 22 lowers the upper flatcar 3, causing it to fall onto the slide rail 21, effectively improving the reliability and safety of the device.

[0023] Furthermore, in a specific implementation, the lower flatcar 2 provided in this embodiment of the present invention is provided with a positioning plate 23, on which positioning holes 230 are opened. The lower flatcar 2 is fixed to the foundation by means of pins passing through the positioning holes 230. Specifically, corresponding holes are pre-embedded in the foundation. When the lower flatcar 2 reaches the appropriate position, it is fixed by means of pins, which effectively prevents the lower flatcar 2 from shifting during operation and helps to improve the overall working safety and stability.

[0024] Furthermore, in specific implementation, such as Figure 4 As shown, the slide rail 21 and the longitudinal track 12 provided in this embodiment of the utility model are joined by mortise and tenon joints. Specifically, the slide rail 21 and the longitudinal track 12 may have different lengths at their mating ends, ensuring that the slide rail 21 does not interfere with the longitudinal track 12 during sliding, making the connection between the slide rail 21 and the longitudinal track 12 more secure, and also facilitating the positioning and docking of the slide rail 21 and the longitudinal track 12.

[0025] Furthermore, in specific implementations, the transverse track 11, longitudinal track 12, and slide rail 21 provided in this utility model embodiment are all made of channel steel or I-beam steel.

[0026] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A double-decker flatcar, comprising a transverse track (11) and a longitudinal track (12), characterized in that, It also includes a lower flatcar (2) slidably connected to the transverse track (11), the lower flatcar (2) being equipped with a slide rail (21) for docking with the longitudinal track (12), the slide rail (21) being slidably connected to an upper flatcar (3) for placing a steel arch, the longitudinal track (12) being higher than the transverse track (11).

2. A double-decker flatcar as described in claim 1, characterized in that, The lower flatcar (2) is equipped with a lifting mechanism (22) for lifting the upper flatcar (3) off the slide rail (21).

3. A double-decker flatcar as described in claim 2, characterized in that, The lifting mechanism (22) adopts a wedge.

4. A double-decker flatcar as described in claim 1, characterized in that, The lower flatcar (2) is provided with a positioning plate (23), and the positioning plate (23) is provided with a positioning hole (230). The lower flatcar (2) is fixed to the foundation by a pin passing through the positioning hole (230).

5. A double-decker flatcar as described in claim 1, characterized in that, The slide rail (21) and the longitudinal track (12) are fitted with a tenon and mortise joint.

6. A double-decker flatcar as described in claim 1, characterized in that, The lower flatcar (2) is moved by a winch, and the upper flatcar (3) is driven by a motor.

7. A double-decker flatcar as described in claim 1, characterized in that, The transverse track (11), the longitudinal track (12), and the slide rail (21) are all made of channel steel or I-beams.

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