A special lifting device and lifting method for high-speed railway prefabricated box girder reinforcement net

Abstract

The application provides a special lifting appliance for high-speed railway prefabricated box girder reinforcement net and a lifting method, which comprises an upper lifting beam, two lifting lugs arranged on the upper lifting beam and used for connecting hoisting equipment for lifting, a middle lifting beam, wings arranged on both sides of the middle lifting beam in the width direction and connected to the middle lifting beam correspondingly, a lower lifting beam arranged below the middle lifting beam, having a width smaller than that of the middle lifting beam and connected to the upper lifting beam through a lifting driving element, and a plurality of hooks distributed on the middle lifting beam, the wings and the lower lifting beam for hanging and taking reinforcement net. The railway prefabricated box girder reinforcement framework is divided into a plurality of reinforcement nets and a plurality of steel belt nets, which are lifted through the middle lifting beam, the lower lifting beam and the wings, so that mechanical intelligent component net machining and automatic assembly are realized, and mechanization and automation are achieved. The special lifting appliance forms a prefabricated box girder reinforcement framework assembly type construction production line, and the automatic assembly of the bridge box girder reinforcement framework is realized.

Description

Technical Field

[0001] This invention belongs to the field of bridge construction technology, specifically relating to a special lifting tool and lifting method for steel mesh of precast box girders for high-speed railways. Background Technology

[0002] As railway construction expands into high-altitude and high-environment areas, intelligent innovation in high-speed railway beam yards can reduce the number of workers required for railway construction, serving the needs of major strategic projects. Currently, beam yards face challenges such as the manual binding of box girder reinforcement by a high density of workers for simply supported box girders, low integration of intelligent equipment, poor information technology effectiveness (low efficiency and poor quality stability), and harsh outdoor working conditions. These issues make it difficult to meet the requirements of high-quality development and urgently require technological breakthroughs.

[0003] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides a special lifting tool and lifting method for the steel mesh of precast box girders for high-speed railways.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A special lifting tool for steel mesh reinforcement of precast box girders for high-speed railways includes:

[0007] The upper lifting beam is equipped with two lifting lugs for connecting lifting equipment for lifting.

[0008] The middle suspension beam is fixed below the upper suspension beam. The middle suspension beam has a certain width, and wing beams are hinged to both sides of its width direction.

[0009] The lower lifting beam is located below the middle lifting beam, and its width is smaller than that of the middle lifting beam. It is connected to the upper lifting beam through a lifting drive component.

[0010] Multiple hooks are distributed on the middle lifting beam, the wing beam and the lower lifting beam to hook the steel mesh.

[0011] Preferably, the wing beam extends upward with a hinged column, and the middle suspension beam is provided with a rotary drive component corresponding to and connected to the hinged column.

[0012] Preferably, the middle suspension beam is a square truss, the upper suspension beam is located at the center line of the middle suspension beam, and the middle suspension beam is provided with ribs that connect to the upper suspension beam.

[0013] Preferably, the lower suspension beam is a square truss with a width smaller than that of the middle suspension beam, and cross braces are provided at both ends of the upper suspension beam. Lifting drive components are respectively hinged to both ends of the cross braces, and the lower ends of the lifting drive components pass through the middle suspension beam and are hinged to both sides of the lower suspension beam.

[0014] Preferably, the lifting lug is slidably assembled along the length direction of the upper lifting beam, and a displacement driving component corresponding to the lifting lug is provided on the upper lifting beam.

[0015] Preferably, the upper surface of the upper lifting beam is provided with a slide rail extending along its length, the bottom of the lifting lug is provided with a slide seat slidably mounted on the slide rail, and the two ends of the slide rail are provided with baffles corresponding to the slide seats.

[0016] Preferably, tie rods corresponding to the side edges of the middle hanging beam are provided on both sides of the upper hanging beam.

[0017] A method for hoisting the reinforcing mesh of precast box girders for high-speed railways, using any of the aforementioned lifting devices.

[0018] The steel reinforcement cage of the box girder includes: bottom slab steel mesh, web outer steel mesh, top slab bottom steel mesh, and top slab top steel mesh;

[0019] And the bottom slab top reinforcement mesh, the web inner reinforcement mesh, the bottom slab spur inclined reinforcement mesh, the cantilever bottom inner reinforcement mesh, the top slab spur inclined reinforcement mesh, the top slab bottom reinforcement mesh, the top slab top reinforcement mesh, the cantilever bottom outer reinforcement mesh, and the cantilever top reinforcement mesh;

[0020] The specific hoisting steps include:

[0021] First, lay the U-shaped steel bars for the bottom plate, then lift the steel mesh for the bottom plate using a steel mesh hoist. Next, rotate the two wing beams upwards and lift the outer steel mesh for the two web plates using a steel mesh hoist. Connect the U-shaped steel bars for the bottom plate with the corresponding steel mesh for the bottom plate and the outer steel mesh for the web plates to form a whole.

[0022] Rotate upwards to retract the two wing beams, and use the middle and lower lifting beams to lift the top steel mesh of the bottom slab to above the steel strip mesh of the bottom slab, and fix the top steel mesh of the bottom slab to the steel strip mesh of the bottom slab.

[0023] The inner steel mesh of the two web plates is hoisted by the lower lifting beam. After the inner steel mesh of the web plates is fixed to the top steel mesh of the bottom plate and the outer steel strip of the web plates, the two bottom plate inclined steel meshes are hoisted by the lower lifting beam and fixedly connected to the corresponding top steel mesh of the bottom plate and the inner steel mesh of the web plates.

[0024] The inner steel mesh of the two cantilever bottoms is hoisted by the lower lifting beam and then connected and fixed to the corresponding inner steel mesh of the web and the outer steel strip of the web.

[0025] The two top plate inclined steel meshes are installed using the lower lifting beam, and the top plate inclined steel meshes are connected and fixed to the corresponding inner web steel mesh and outer web steel strip mesh.

[0026] The bottom steel strip mesh of the top slab is hoisted using a steel strip mesh lifting device. The bottom steel strip mesh of the top slab is hoisted between the two top slab inclined steel strip meshes through the middle lifting beam, the lower lifting beam and the wing beam, and then fixedly connected to the two top slab inclined steel strip meshes.

[0027] The top steel mesh of the top slab is hoisted to the top of the bottom steel mesh of the top slab through the middle lifting beam, the lower lifting beam and the wing beam, and then fixedly connected to the bottom steel mesh of the top slab.

[0028] Two top steel mesh strips are hoisted separately using the lower lifting beam and then fixedly connected to both sides of the top steel mesh strip of the top slab.

[0029] The two outer steel meshes of the cantilever bottom are lifted by the lower lifting beam and then connected to the corresponding inner steel meshes of the cantilever bottom.

[0030] Two cantilever top steel meshes are hoisted separately using the lower lifting beam, and then fixedly connected to the corresponding cantilever bottom outer steel mesh and top slab steel mesh.

[0031] Preferably, when hoisting the steel mesh through the lower lifting beam, the lifting device is suspended above the steel reinforcement skeleton of the box girder, and the lower lifting beam is rotated by the lifting drive components on both sides of the main beam to install the steel mesh.

[0032] Beneficial effects: The steel reinforcement cage of the precast railway box girder is decomposed into multiple steel mesh and multiple steel strip mesh, which are hoisted by the middle lifting beam, the lower lifting beam and the wing beam. This realizes the intelligent processing and automated assembly of the component mesh, replacing manpower with mechanization and reducing manpower with automation. The special lifting tool of this application forms a prefabricated railway box girder steel reinforcement cage assembly production line for the automated assembly of bridge box girder steel reinforcement cages. Attached Figure Description

[0033] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. Wherein:

[0034] Figure 1 This is a simplified structural diagram of the lifting device provided in a specific embodiment of the present invention;

[0035] Figure 2 This is a simplified front view of the lifting device in a specific embodiment provided by the present invention;

[0036] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0037] Figure 4 This is a schematic diagram of the splicing of the steel reinforcement cage in a specific embodiment of the present invention.

[0038] In the diagram: 1. Wing beam; 2. Upper lifting beam; 3. Middle lifting beam; 4. Lower lifting beam; 5. Hook; 6. Rotation drive component; 7. Lifting drive component; 8. Lifting lug; 9. Cross brace; 10. Displacement drive component; 11. Tie rod; 12. Slide seat; 13. Slide rail; 14. U-shaped steel reinforcement in the bottom plate; 15. Upper sprocket; 16. Lower sprocket; 17. Transmission chain; 18. Reel; A1. Bottom plate steel reinforcement mesh; A2. Inner side steel reinforcement mesh of the web; A3. Diagonal steel reinforcement mesh of the bottom plate; A4. Inner side steel reinforcement mesh of the cantilever bottom; A5. Diagonal steel reinforcement mesh of the top plate; A6. Bottom steel reinforcement mesh of the top plate;

[0039] A7. Top slab reinforcement mesh; A8. Cantilever bottom outer reinforcement mesh; A9. Cantilever top reinforcement mesh; B1. Bottom slab steel strip mesh; B2. Web outer steel strip mesh; B3. Top slab bottom steel strip mesh; B4. Top slab top steel strip mesh. Detailed Implementation

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0041] In the description of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "connected" and "linked" used in this invention should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0042] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0043] like Figure 1-4As shown, a special lifting tool for the reinforcing mesh of precast box girders for high-speed railways includes an upper lifting beam, a middle lifting beam, and a lower lifting beam. The upper lifting beam is a square steel beam with two lifting lugs located at both ends for connecting lifting equipment for lifting. The middle lifting beam is fixed below the upper lifting beam, with both ends of the upper lifting beam extending equally beyond the middle lifting beam. The two are fixedly connected. In this embodiment, the middle lifting beam has a certain width, specifically adapted to the spacing between the two inner reinforcing meshes of the web (slightly smaller than the spacing between the two inner reinforcing meshes of the web), so that the two flanges of the middle lifting beam can accurately position the inner reinforcing meshes of the web after lifting them.

[0044] On both sides of the central lifting beam, there are corresponding hinged wing beams. The length of the wing beams is equal to that of the central lifting beam, and they have a certain width. After the wing beams are unfolded, the width of the lifting device is adapted to the width of the bridge top surface.

[0045] The lower lifting beam is located below the middle lifting beam. The width of the lower lifting beam is smaller than that of the middle lifting beam. It is connected to the upper lifting beam through a lifting drive component. This allows for the lifting of the top steel mesh of the bottom slab. During the lifting process, the lifting equipment will not collide with the already installed outer steel mesh of the web.

[0046] Multiple hooks are distributed on the middle lifting beam, wing beam and lower lifting beam to hang the steel mesh. The hooks are arranged in an array in the longitudinal projection and face the same end of the lifting device.

[0047] In this embodiment, each wing spar has one row of hooks, which are arranged on the outer side edge of the wing spar; the middle suspension beam has two rows of hooks, which are arranged on both sides of the middle suspension beam; the lower suspension beam has three rows of hooks, which are arranged on both sides and at the center line of the lower suspension beam.

[0048] In this embodiment, the equipment consists of two 20t rail-mounted gantry cranes, each mounted on a separate lifting lug. The distance between the two gantry cranes is equal to the distance between the two lifting lugs. They are controlled synchronously by the same controller to drive the lifting device provided in this application to move and transport the required steel mesh to the designated location.

[0049] In one optional embodiment, the wing spar is hinged to the central suspension beam via a hinge shaft. A hinge post extends upward from the middle of the wing spar, and a rotation drive component corresponding to the hinge post is provided on the central suspension beam. The rotation drive component drives the wing spar, allowing it to rotate, thereby enabling the wing spar to be unfolded or folded upward.

[0050] The rotary drive component can be a hydraulic cylinder, and a reinforcing rod connecting the outer side of the wing beam is provided on the side of the hinge column away from the upper lifting beam.

[0051] A hinge plate is provided on the side of the middle suspension beam, and a corresponding hinge plate is provided on the wing beam, so that the hinge is realized through the hinge shaft.

[0052] In an optional embodiment, the upper lifting beam can be made of square steel, I-beam, or channel steel, but it should have a certain strength so that the load of the lifting device is not less than 10 tons. The middle lifting beam is a square truss welded from square steel or channel steel. There are no restrictions on the shape of the middle lifting beam, but it should at least have longitudinal beams with corresponding hooks.

[0053] The upper lifting beam is located at the center line of the middle lifting beam and is fixed to the middle lifting beam by bolts or welding. The middle lifting beam is provided with corresponding ribs to connect to the upper lifting beam, which are used to strengthen the connection point between the upper and middle lifting beams and ensure the overall strength of the lifting equipment.

[0054] In one optional embodiment, the lower lifting beam is a square truss welded from square steel or channel steel, with a width smaller than that of the middle lifting beam. Horizontal braces are provided at both ends of the upper lifting beam, with the length of the braces matching the width of the lower lifting beam. Lifting drive components, which are hydraulic cylinders, are hinged to both ends of the horizontal braces. The lower ends of the lifting drive components pass through the middle lifting beam and are hinged to both sides of the lower lifting beam. This allows the lower lifting beam to be raised and lowered relative to the middle lifting beam. Furthermore, by driving the lifting drive components located on both sides of the lower lifting beam, the lower lifting beam can be rotated, thereby independently completing the hoisting and installation of the bottom plate steel mesh.

[0055] In one optional embodiment, the lifting lug is slidably assembled along the length of the upper lifting beam. A displacement drive component corresponding to the lifting lug is provided on the upper lifting beam. The displacement drive component is a hydraulic cylinder, which can drive relative displacement through the lifting lug, thereby causing the entire lifting device to move. Since the hooks face the same side, the overall displacement of the lifting device allows the hook to be accurately hooked onto the steel bar, so that the hooks can hold the steel bar and lift the gantry crane, ensuring that the hooks can accurately apply lifting force to the steel mesh during lifting.

[0056] In some embodiments, the hook can be fixed to the lifting device by welding. Of course, in order to adapt to the web reinforcement mesh on the inner and outer sides of the box girder reinforcement skeleton, the hook is fixed to the lifting device by a lifting rod. Specifically, the lifting rod is a small hydraulic cylinder and is fixed longitudinally on the corresponding middle lifting beam, wing beam and lower lifting beam. The hook is fixed to the piston end of the lifting rod, so that the length of the hook can be adjusted according to actual needs, thus making it more adaptable.

[0057] In this embodiment, the control solenoid valves of the gantry crane, lifting drive, displacement drive, rotation drive, and lifting rod are all connected to the controller, enabling overall drive control of the lifting equipment. The lifting rods located on the wing beam, middle lifting beam, and lower lifting beam can be independently controlled by the controller.

[0058] In one optional embodiment, the upper surface of the upper lifting beam is provided with a slide rail extending along its length, with both sides of the slide rail extending outwards from both sides of the upper lifting beam. Both sides of the slide rail are dovetail-shaped protrusions extending outwards. The bottom of the lifting lug is provided with a slide seat that is slidably mounted on the slide rail. The slide seat is provided with a corresponding slide groove of the slide rail to achieve sliding assembly. Both ends of the slide rail are provided with baffles corresponding to the slide seats to limit the movement path of the slide seats and prevent the slide seats from disengaging from the slide rail.

[0059] In an optional embodiment, tie rods corresponding to the side edges of the middle lifting beam are provided on both sides of the upper lifting beam to improve the overall strength of the lifting device. The tie rods consist of two sections, which are connected by a threaded sleeve. The two ends of the threaded sleeve are provided with reverse threads corresponding to the two tie rod sections.

[0060] In an optional embodiment, the present invention also provides a method for hoisting steel mesh for precast box girders of high-speed railways, wherein the steel mesh and steel strip mesh are hoisted using the aforementioned hoisting equipment to splice and fix the steel reinforcement skeleton of the box girder.

[0061] In this embodiment, the box girder reinforcement cage is decomposed into 15 steel meshes and 6 steel strip mesh components, wherein the steel strip mesh components include: 1 bottom plate steel strip mesh, 2 web outer steel strip meshes, 1 top plate bottom steel strip mesh, and 2 top plate top steel strip meshes;

[0062] The steel mesh components include 1 bottom slab top steel mesh, 2 web inner steel meshes, 2 bottom slab rib inclined steel meshes, 2 cantilever bottom inner steel meshes, 2 top slab rib inclined steel meshes, 1 top slab bottom steel mesh, 1 top slab top steel mesh, 2 cantilever bottom outer steel meshes, and 2 cantilever top steel meshes;

[0063] The specific hoisting steps include:

[0064] First, lay the U-shaped steel bars for the bottom plate, then lift the steel mesh for the bottom plate using a steel mesh hoist. Next, rotate the two wing beams upwards and lift the outer steel mesh for the two web plates using a steel mesh hoist. Connect the U-shaped steel bars for the bottom plate with the corresponding steel mesh for the bottom plate and the outer steel mesh for the web plates to form a whole.

[0065] Rotate upwards to retract the two wing beams, and use the middle and lower lifting beams to lift the top steel mesh of the bottom slab to above the steel strip mesh of the bottom slab, and fix the top steel mesh of the bottom slab to the steel strip mesh of the bottom slab.

[0066] The inner steel mesh of the two web plates is hoisted by the lower lifting beam. After the inner steel mesh of the web plates is fixed to the top steel mesh of the bottom plate and the outer steel strip of the web plates, the two bottom plate inclined steel meshes are hoisted by the lower lifting beam and fixedly connected to the corresponding top steel mesh of the bottom plate and the inner steel mesh of the web plates.

[0067] The inner steel mesh of the two cantilever bottoms is hoisted by the lower lifting beam and then connected and fixed to the corresponding inner steel mesh of the web and the outer steel strip of the web.

[0068] The two top plate inclined steel meshes are installed using the lower lifting beam, and the top plate inclined steel meshes are connected and fixed to the corresponding inner web steel mesh and outer web steel strip mesh.

[0069] The bottom steel strip mesh of the top slab is hoisted using a steel strip mesh lifting device. The bottom steel strip mesh of the top slab is hoisted between the two top slab inclined steel strip meshes through the middle lifting beam, the lower lifting beam and the wing beam, and then fixedly connected to the two top slab inclined steel strip meshes.

[0070] The top steel mesh of the top slab is hoisted to the top of the bottom steel mesh of the top slab through the middle lifting beam, the lower lifting beam and the wing beam, and then fixedly connected to the bottom steel mesh of the top slab.

[0071] Two top steel mesh strips are hoisted separately using the lower lifting beam and then fixedly connected to both sides of the top steel mesh strip of the top slab.

[0072] The two outer steel meshes of the cantilever bottom are lifted by the lower lifting beam and then connected to the corresponding inner steel meshes of the cantilever bottom.

[0073] Two cantilever top steel meshes are hoisted separately using the lower lifting beam, and then fixedly connected to the corresponding cantilever bottom outer steel mesh and top slab steel mesh.

[0074] In this embodiment, the control solenoid valves for the gantry crane, lifting drive, displacement drive, rotation drive, and lifting rod are all connected to the controller, enabling intelligent mechanical component mesh processing and automated assembly, replacing manual labor with mechanization and reducing manpower through automation. Automated assembly is achieved through the special lifting tool specified in this application.

[0075] In this embodiment, if the width of the wing beam after unfolding is less than the width of the bridge top surface, the steel mesh on the inner side of the cantilever bottom, the steel mesh on the outer side of the cantilever bottom, and the steel mesh on the top of the cantilever can be hoisted in two stages.

[0076] In this application, the reinforcing mesh in the box girder refers to a square reinforcing mesh design composed of reinforcing bars in two perpendicular directions, with the intersections being resistance welded using a reinforcing mesh welding machine. The steel strip mesh in the box girder refers to a steel strip mesh composed of design reinforcing bars and steel strips in two perpendicular directions. The steel strip mesh is laid out at certain intervals along the direction of the design reinforcing bars, and the intersections are electrically welded using a steel strip mesh welding machine. The function of the steel strip mesh is to connect the design reinforcing bars and to hoist and install the design reinforcing bars by bundling them into rolls (barrel-shaped) using the steel strip mesh.

[0077] In this embodiment, when the steel mesh is hoisted via the lower lifting beam, the lifting device is driven to the top of the box girder steel reinforcement skeleton, and the lower lifting beam is rotated by the lifting drive components on both sides of the main beam to install the steel mesh.

[0078] The steel strip mesh is processed into a roll shape by a steel strip mesh welding machine, which is convenient for hoisting. After the steel strip mesh is hoisted into place, the roll-shaped steel strip mesh is manually unfolded and laid.

[0079] The steel strip mesh lifting device includes a reel and a winding mechanism. The upper lifting beam extends from both ends of the middle lifting beam, and the winding mechanism is fixed to both ends of the extended beam by bolts. The reel is located directly below the lifting device, and the two ends are connected to the winding mechanism by a transmission chain. The steel strip mesh is formed into a roll shape after being processed by a steel strip mesh welding machine, and the roll-shaped steel strip mesh is correspondingly set on the reel.

[0080] In this embodiment, the winding mechanism is a stepper motor. The stepper motor spindle is equipped with an upper sprocket, and the two ends of the winding shaft are equipped with lower sprockets. The upper and lower sprockets are transmitted through a meshing transmission chain, which can drive the winding reel through the stepper motor. The upper sprocket is smaller than the lower sprocket.

[0081] The stepper motor is connected to the controller. After the steel strip mesh is hoisted, the lower sprocket and reel of the steel strip mesh hoisting tool are removed.

[0082] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention shall be within the scope of protection of the pending claims of the present invention.

Claims

1. A method for hoisting steel mesh for precast box girders in high-speed railways, characterized by using a steel mesh hoisting device: The steel reinforcement cage of the box girder includes: bottom slab steel mesh, web outer steel mesh, top slab bottom steel mesh, and top slab top steel mesh; And the bottom slab top reinforcement mesh, the web inner reinforcement mesh, the bottom slab spur inclined reinforcement mesh, the cantilever bottom inner reinforcement mesh, the top slab spur inclined reinforcement mesh, the top slab bottom reinforcement mesh, the top slab top reinforcement mesh, the cantilever bottom outer reinforcement mesh, and the cantilever top reinforcement mesh; The specific hoisting steps include: First, lay the U-shaped steel bars for the bottom plate, then lift the steel mesh for the bottom plate using a steel mesh hoist. Next, rotate the two wing beams upwards and lift the outer steel mesh for the two web plates using a steel mesh hoist. Connect the U-shaped steel bars for the bottom plate with the corresponding steel mesh for the bottom plate and the outer steel mesh for the web plates to form a whole. Rotate upwards to retract the two wing beams, and use the middle and lower lifting beams to lift the top steel mesh of the bottom slab to above the steel strip mesh of the bottom slab, and fix the top steel mesh of the bottom slab to the steel strip mesh of the bottom slab. The inner steel mesh of the two web plates is hoisted by the lower lifting beam. After the inner steel mesh of the web plates is fixed to the top steel mesh of the bottom plate and the outer steel strip of the web plates, the two bottom plate inclined steel meshes are hoisted by the lower lifting beam and fixedly connected to the corresponding top steel mesh of the bottom plate and the inner steel mesh of the web plates. The inner steel mesh of the two cantilever bottoms is hoisted by the lower lifting beam and then connected and fixed to the corresponding inner steel mesh of the web and the outer steel strip of the web. The two top plate inclined steel meshes are installed using the lower lifting beam, and the top plate inclined steel meshes are connected and fixed to the corresponding inner web steel mesh and outer web steel strip mesh. The bottom steel strip mesh of the top slab is hoisted using a steel strip mesh lifting device. The bottom steel strip mesh of the top slab is hoisted between the two top slab inclined steel strip meshes through the middle lifting beam, the lower lifting beam and the wing beam, and then fixedly connected to the two top slab inclined steel strip meshes. The top steel mesh of the top slab is hoisted to the top of the bottom steel mesh of the top slab through the middle lifting beam, the lower lifting beam and the wing beam, and then fixedly connected to the bottom steel mesh of the top slab. Two top steel mesh strips are hoisted separately using the lower lifting beam and then fixedly connected to both sides of the top steel mesh strip of the top slab. The two outer steel meshes of the cantilever bottom are lifted by the lower lifting beam and then connected to the corresponding inner steel meshes of the cantilever bottom. Two cantilever top steel meshes are hoisted separately by the lower lifting beam, and the cantilever top steel meshes are fixedly connected to the corresponding cantilever bottom outer steel meshes and top slab steel meshes; The steel mesh lifting equipment includes: The upper lifting beam is equipped with two lifting lugs for connecting lifting equipment for lifting. The middle suspension beam is fixed below the upper suspension beam. The middle suspension beam has a certain width, and wing beams are hinged to both sides of its width direction. The lower lifting beam is located below the middle lifting beam, and its width is smaller than that of the middle lifting beam. It is connected to the upper lifting beam through a lifting drive component. The hooks are distributed on the middle lifting beam, the wing beam and the lower lifting beam to hook the steel mesh. The steel strip mesh lifting device includes a reel and a winding mechanism. The upper lifting beam extends from both ends of the middle lifting beam, and the winding mechanism is fixed to both ends of the extended beam by bolts. The reel is located directly below the lifting device, and the two ends are connected to the winding mechanism by a transmission chain. The steel strip mesh is formed into a roll shape after being processed by a steel strip mesh welding machine, and the roll-shaped steel strip mesh is correspondingly set on the reel.

2. The method for hoisting and transporting steel mesh for precast box girders in high-speed railways according to claim 1, characterized in that, The wing beam extends upward with a hinged column, and the middle suspension beam is equipped with a rotary drive component that is correspondingly connected to the hinged column.

3. The method for hoisting and transporting steel mesh for precast box girders in high-speed railways according to claim 1, characterized in that, The middle suspension beam is a square truss, and the upper suspension beam is located at the center line of the middle suspension beam. The middle suspension beam is provided with ribs that connect to the upper suspension beam.

4. The method for hoisting and transporting steel mesh for precast box girders in high-speed railways according to claim 1, characterized in that, The lower suspension beam is a square truss with a width smaller than that of the middle suspension beam. Horizontal braces are provided at both ends of the upper suspension beam, and lifting drive components are hinged to both ends of each horizontal brace. The lower ends of the lifting drive components pass through the middle suspension beam and are hinged to both sides of the lower suspension beam.

5. The method for hoisting and transporting steel mesh for precast box girders in high-speed railways according to claim 1, characterized in that, The lifting lug is slidably assembled along the length of the upper lifting beam, and a displacement driving component corresponding to the lifting lug is provided on the upper lifting beam.

6. The method for hoisting and transporting steel mesh for precast box girders in high-speed railways according to claim 1, characterized in that, The upper surface of the upper lifting beam is provided with a slide rail extending along its length, the bottom of the lifting lug is provided with a slide seat slidably mounted on the slide rail, and the two ends of the slide rail are provided with baffles corresponding to the slide seats.

7. The method for hoisting and transporting steel mesh for precast box girders in high-speed railways according to claim 1, characterized in that, Tie rods are provided on both sides of the upper lifting beam to connect to the side edges of the middle lifting beam.

8. The method for hoisting and transporting steel mesh for precast box girders in high-speed railways according to claim 1, characterized in that: When hoisting the steel mesh using the lower lifting beam, the lifting device is suspended above the steel reinforcement skeleton of the box girder, and the lower lifting beam is rotated by the lifting drive components on both sides of the upper lifting beam to install the steel mesh.

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