Box girder mesh assembling equipment and method for completing angle adjustment in air

Abstract

The application provides a box girder mesh assembling device and method for completing angle adjustment in the air, which comprises a bottom rib platform and a splicing platform, two splicing platforms are arranged on the two sides of the bottom rib platform and reciprocate along the width direction of the bottom rib platform, a splicing support is arranged above the splicing platform, the splicing support has an inclined assembly surface corresponding to the inclination angle of the box girder web plate, a travelling crane, the travelling crane is a square truss corresponding to the web plate reinforcement mesh and the top plate reinforcement mesh, hooks corresponding to the reinforcement mesh are arrayed on the lower surface of the travelling crane, a lifting mechanism is connected above the travelling crane in a hinged manner, an angle adjusting device is arranged between the lifting mechanism and the travelling crane, the reinforcement mesh is first bound by the mechanical equipment, the reinforcement binding efficiency is improved, the web plate reinforcement mesh after the binding is completed is subjected to angle adjustment by the travelling crane, then the splicing trolley is used for splicing, the structure is simple, the splicing efficiency is high, and the production efficiency of the reinforcement cage can be greatly improved.

Description

Technical Field

[0001] This invention belongs to the technical field of precast beam steel cage splicing, specifically relating to a box girder mesh assembly equipment and method for completing angle adjustment in the air. Background Technology

[0002] Box girders are a common structural form in bridge engineering, with a cross-section comprising a top slab, web, bottom slab, flanges, and a cavity. With the rapid development of my country's transportation construction, box girder prefabrication technology has made significant progress through continuous innovation. Traditionally, the jigs used for tying the reinforcing steel in box girders need to be custom-made according to the dimensions of the box girder's reinforcing cage. The jig dimensions are fixed, and their width cannot be adjusted; therefore, one jig can only correspond to one box girder. Furthermore, due to the shape limitations of the box girder, it is difficult for mechanical equipment to reach inside the reinforcing cage for operation, and excessive manual intervention results in low automation and low jig tying efficiency.

[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 box girder mesh assembly device and method for completing angle adjustment in the air.

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

[0006] A box girder mesh assembly device that performs angle adjustments in mid-air includes:

[0007] A bottom reinforcement platform, which is used to place the bottom slab steel mesh;

[0008] The splicing platform is provided on both sides of the bottom reinforcement platform and moves back and forth along the width direction of the bottom reinforcement platform. A splicing bracket is provided above the splicing platform and the splicing bracket has an inclined assembly surface corresponding to the inclination angle of the box girder web.

[0009] The gantry crane is a square truss corresponding to the web reinforcement mesh and the top reinforcement mesh. Hooks corresponding to the reinforcement mesh are arrayed on the lower surface of the gantry crane. A lifting mechanism is connected to the top of the gantry crane by a hinge. A traveling beam is connected to the top of the lifting mechanism. The two ends of the traveling beam travel on guide rails extending along the width direction of the bottom reinforcement platform.

[0010] An angle adjustment device is provided between the lifting mechanism and the overhead crane to adjust the angles of the bottom plate steel mesh, the web plate steel mesh, and the top plate steel mesh.

[0011] Preferably, the overhead crane has multiple hinge points corresponding to the hinged adjustment frame, and the adjustment frame is connected to the traveling beam through multiple lifting mechanisms;

[0012] The adjustment frame is a square truss, and its length is adapted to the length of the overhead crane. Multiple hinge points are evenly distributed along the length of the overhead crane.

[0013] Each hinge point is provided with an angle adjustment device to drive the gantry crane to rotate around the hinge point.

[0014] Preferably, the angle adjustment device includes:

[0015] A half-gear, which is fixed to the overhead crane;

[0016] A drive gear meshes with the half gear and is driven by a first stepper motor;

[0017] The drive gear is smaller than a half gear.

[0018] Preferably, the two ends of the traveling beam are supported on the guide rail by rollers, and the guide rail is provided with a rail groove corresponding to the rollers. The rollers are connected to a second stepper motor for driving.

[0019] Above the traveling beam is a support rail parallel to the guide rail, below the support rail is a guide strip with a dovetail-shaped cross-section, and above the traveling beam is a dovetail groove slidably mounted on the guide strip.

[0020] Preferably, a row of limiting clamps is provided on each side of the gantry crane in the width direction. The limiting clamps include a clamp body and a clamp head. The clamp body has hinge slots extending from both sides. The ends of the two hinge slots are correspondingly hinged to the clamp heads. The rear ends of the clamp heads have hinge ears extending opposite each other. The hinge ears are hinged together by a pin. The hinge ears are provided with a strip-shaped hole extending along the extension direction of the hinge ear corresponding to the pin. The front end of the clamp head has an arc-shaped structure. The end of the clamp body is provided with a drive rod corresponding to the pin. The drive rod extends and retracts to make the front ends of the clamp heads move closer together to close or move away from each other to open.

[0021] The main body of the clamp is a groove-shaped structure, and the two clamps are hinged in an interlaced manner.

[0022] Preferably, the splicing bracket has multiple rebar hooks corresponding to the web rebar mesh distributed on it. The middle part of the rebar hook is hinged to the splicing bracket. One end of the rebar hook extends out of the inclined assembly surface and is bent upward into an L-shaped hook body. The splicing bracket is provided with a stop block corresponding to the other end of the rebar hook to limit the rotation angle of the rebar hook.

[0023] Preferably, the inclined assembly surface of the splicing bracket is provided with a plurality of assembly rods corresponding to the rebar hooks, and the rebar hooks are hinged to any side of the assembly rods corresponding to the length direction of the bottom rebar platform via hinge shafts;

[0024] The hinge shaft is provided with a torsion spring corresponding to the rebar hook, so as to drive the rebar hook to stick to the stop block and maintain the tendency of the L-shaped hook body to extend out of the inclined assembly surface.

[0025] A method for assembling box girder mesh panels with in-flight angle adjustment, comprising splicing steel mesh panels using any of the aforementioned splicing equipment, including:

[0026] Step S1: Tie the bottom slab steel mesh, web steel mesh, and top slab steel mesh on the jig.

[0027] Step S2: The bottom slab steel mesh is hoisted to the bottom reinforcement platform using a gantry crane;

[0028] Step S3: Hoist the web steel mesh to the splicing platform, adjust the angle of the overhead crane to make the web steel mesh parallel to the inclined assembly surface and place it on the splicing platform.

[0029] Step S4: After placing the corresponding web reinforcement mesh on the two splicing platforms, push the two splicing platforms toward the bottom reinforcement platform so that the edges of the web reinforcement mesh and the bottom reinforcement mesh intersect. Insert longitudinal reinforcement bars at the intersection and fix them.

[0030] Step S5: The top slab steel mesh is hoisted to the design position using a gantry crane. Longitudinal bars are then threaded through the intersection of the web steel mesh and the top slab steel mesh and fixed to form a precast steel cage.

[0031] Preferably, there are four longitudinal bars at the intersection of the web reinforcement mesh and the bottom slab reinforcement mesh, and the four longitudinal bars are respectively attached to the inner side of the four intersection points.

[0032] There are four longitudinal bars at the intersection of the web reinforcement mesh and the top slab reinforcement mesh, and the four longitudinal bars are respectively attached to the inner side of the four intersection points.

[0033] Beneficial effects: By first binding each steel mesh with mechanical equipment, the efficiency of steel binding can be improved. After the binding is completed, the web steel mesh is adjusted at the angle by a gantry crane, and then spliced ​​using a splicing trolley. The structure is simple and the splicing efficiency is high, which can greatly improve the production efficiency of steel cages. Attached Figure Description

[0034] 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:

[0035] Figure 1 This is a schematic diagram illustrating the adjustment of the web reinforcement mesh angle in a specific embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of the web reinforcement mesh splicing in a specific embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of the splicing of the top slab steel mesh in a specific embodiment provided by the present invention;

[0038] Figure 4 This is a schematic diagram of the installation of the rebar hook in a specific embodiment provided by the present invention;

[0039] Figure 5 for Figure 3 Enlarged view of point A in the middle;

[0040] Figure 6 This is a schematic diagram of the overhead crane structure in a specific embodiment provided by the present invention;

[0041] Figure 7 This is a schematic diagram of the overhead crane rotation in a specific embodiment provided by the present invention;

[0042] Figure 8 This is a schematic diagram of the limiting clamp structure in a specific embodiment of the present invention;

[0043] Figure 9 This is a schematic diagram of the clamp structure in a specific embodiment of the present invention.

[0044] In the diagram: 1. Guide rail; 2. Lifting mechanism; 3. Angle adjustment device; 4. Overhead crane; 5. Web plate steel mesh; 6. Splicing bracket; 7. Splicing platform; 8. Bottom plate steel mesh; 9. Bottom reinforcement platform; 10. Steel bar hook; 11. Adjustment frame; 12. Top plate steel mesh; 13. Limiting block; 14. Assembly rod; 15. Longitudinal reinforcement; 16. Stop block; 17. Traveling beam; 18. Support rail; 19. Guide bar; 20. Hook; 21. Limiting clamp; 301. Drive gear; 302. Half gear; 303. First stepper motor; 2101. Clamp body; 2102. Drive rod; 2103. Chuck; 2104. Pin. Detailed Implementation

[0045] 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.

[0046] 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.

[0047] 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.

[0048] like Figure 1-9 As shown, a box girder mesh assembly device that completes angle adjustment in mid-air divides all the box girder reinforcement cages into four pieces: one bottom plate reinforcement mesh 8, one top plate reinforcement mesh 12, and two web reinforcement meshes 5. The four reinforcement meshes are fabricated on a front platform, at which point all meshes are placed horizontally. The device includes a bottom reinforcement platform 9, a splicing platform 7, and a gantry crane 4. The bottom reinforcement platform 9 is used to place the bottom plate reinforcement mesh 8. The width of the bottom reinforcement platform 9 is narrower than the width of the bottom plate reinforcement mesh 8, allowing the two sides of the bottom plate reinforcement mesh 8 to extend beyond the bottom reinforcement platform 9. This allows the web reinforcement meshes 5 to intersect with the bottom plate reinforcement mesh 8 as the splicing platform 7 moves, enabling the installation of longitudinal reinforcement bars 15 at the intersections to fix the corresponding meshes together. Two splicing platforms 7 are respectively set on both sides of the bottom reinforcement platform 9. A transverse wheel is provided at the bottom of the splicing platform 7, and a guide rail extending along the width direction of the bottom reinforcement platform 9 is provided below the transverse wheel. This allows the splicing platform 7 to reciprocate along the width direction of the bottom reinforcement platform 9 under the push of a motor or manual force. A splicing bracket 6 is provided above the splicing platform 7. The splicing bracket 6 has an inclined assembly surface corresponding to the inclination angle of the box girder web. The inclined assembly surface is used to position the web reinforcement mesh 5, so that the web reinforcement mesh 5 is spliced ​​while maintaining the angle, thereby forming a reinforcement cage.

[0049] The gantry crane 4 is a square truss corresponding to the web steel mesh 5 and the top slab steel mesh 12. Specifically, its length is adapted to the web steel mesh 5 and the top slab steel mesh 12, and its width should be narrower than the web steel mesh 5 and the top slab steel mesh 12. This allows the stirrups on both sides to extend out of the gantry crane 4, thus forming a cross at the edge, so that they can be connected by longitudinal bars 15. It should be noted that the bottom slab steel mesh 8, the web steel mesh 5, and the top slab steel mesh 12 all include stirrups and longitudinal bars 15 of corresponding shapes. The longitudinal bars 15 are not tied at the cross positions designed at the edges of the stirrups, so that the longitudinal bars 15 can be connected after the corresponding meshes form a cross.

[0050] Hooks corresponding to the reinforcing mesh are arrayed on the lower surface of the gantry crane 4. The opening of the hook corresponds to one side of the width of the bottom reinforcement platform 9, so that it can be hung on the reinforcing mesh for lifting. The gantry crane 4 is connected to the lifting mechanism 2 by a hinge, so that it can be raised and lowered according to the actual position. The lifting mechanism 2 is connected to the traveling beam 17. The two ends of the traveling beam 17 travel on the guide rail 1 extending along the width direction of the bottom reinforcement platform 9. The guide rail 1 is set above the assembly equipment, so that the traveling beam 17 can move along the guide rail 1. Below the extension path of the guide rail 1, there is a binding jig corresponding to the outer side of the splicing platform 7, so that the bottom plate reinforcing mesh 8, the top plate reinforcing mesh 12 and the top plate reinforcing mesh 12 can be bound.

[0051] An angle adjustment device 3 is provided between the lifting mechanism 2 and the overhead crane 4 to adjust the angle of the bottom plate steel mesh 8, the web plate steel mesh 5 and the top plate steel mesh 12, so that each steel mesh is fixed by the splicing platform 7 according to the set angle, so as to facilitate the subsequent binding and fixing and improve the production efficiency of the steel cage.

[0052] In an optional embodiment, the gantry crane 4 is connected to the hinged adjustment frame 11 through multiple hinge points. The adjustment frame 11 is connected to the traveling beam 17 through multiple lifting mechanisms 2. The multiple lifting mechanisms 2 are evenly distributed in the length direction of the gantry crane 4. The lifting mechanism 2 is a hydraulic cylinder. The synchronous telescoping device realizes the lifting of the gantry crane 4.

[0053] Each hinge point is hinged by a hinge shaft extending along the length of the bottom rib platform 9. The adjustment frame 11 is a square truss, and the length of the square truss is adapted to the length of the gantry crane 4. Multiple hinge points are evenly distributed along the length of the gantry crane 4, thereby balancing the force points of the gantry crane 4 and ensuring the force balance of the gantry crane 4. In order to perform angle rotation, an angle adjustment device 3 is provided on the gantry crane 4 to drive the gantry crane 4 to rotate around the hinge point.

[0054] The angle adjustment device 3 can be a drive cylinder, with the two ends of the drive cylinder connected to the overhead crane 4 and the adjusting frame 11 respectively, for driving.

[0055] In another embodiment, to ensure the stability of the flipping, an angle adjustment device 3 is provided at each hinge point. To ensure the accuracy of the angle adjustment, the angle adjustment device 3 is driven by gear transmission. Specifically, the angle adjustment device 3 includes a half gear 302 and a drive gear 301. The half gear 302 is welded and fixed to the overhead crane 4, and the drive gear 301 meshes with the half gear 302 and is driven by the first stepper motor 303. More preferably, a gearbox is provided between the first stepper motor 303 and the drive gear 301 to precisely control the angle flipping. The first stepper motor 303 at each hinge point is connected to the same controller to achieve synchronous drive.

[0056] In this configuration, the drive gear 301 is smaller than the half gear 302. The larger half gear 302 refines the rotation angle of the gantry crane 4, thereby enabling precise angle adjustment.

[0057] In an optional embodiment, the two ends of the traveling beam 17 are supported on the guide rail 1 by rollers. The guide rail 1 has a corresponding groove for the rollers. The rollers are connected to a second stepper motor for driving, thereby controlling the movement of the traveling beam 17. Above the traveling beam 17, there is a support rail 18 parallel to the guide rail 1. The support rail 18 is fixed to the workshop ceiling. Below the support rail 18, there is a guide bar 19 with a dovetail-shaped cross section. Above the traveling beam 17, there is a dovetail groove that is slidably mounted on the guide bar 19. The dovetail groove limits the movement of the traveling beam 17 and ensures its stability. There are multiple support rails 18, which are evenly distributed along the length of the traveling beam 17.

[0058] In an optional embodiment, a row of limiting clamps 21 is provided on each side of the gantry crane 4 in the width direction. The limiting clamps 21 correspond to the positions of each row of hooks 20. The limiting clamps 21 are used to clamp the longitudinal bars 15 of the steel mesh located on both sides, thereby preventing the steel mesh from falling off during the angle adjustment and rotation process. Specifically, the length of the limiting clamp 21 is adapted to the length of the hook 20, including a clamp body 2101 and a clamp head 2103. The clamp body 2101 can be a channel steel or a square steel. Hinge slots extend from both sides of the clamp body 2101. The hinge slots are channel steel with opposite openings. The clamp head 2103 is hinged to the end of the two hinge slots. A notch is provided in the middle of one end of the clamp head 2103 corresponding to the hinge slot, so as to allow the clamp head 2103 to rotate in the width direction of the gantry crane 4. Hinge ears extend from the rear end of the clamp head 2103, and the hinge ears extend towards the middle of the clamp body 2101 with a certain degree of overlap. The intersecting parts of the hinge ears are hinged together by pins 2104. The hinge ears are provided with strip holes extending along the extension direction of the hinge ears, corresponding to the pins 2104. In this way, the strip holes make way for the pins 2104 during the relative rotation of the two clamps 2103. The front end of the clamp 2103 is an arc-shaped structure. At the end of the clamp body 2101, there is a drive rod 2102 corresponding to the hinge pins 2104. The drive rod 2102 extends and retracts to make the front ends of the clamps 2103 close together or open apart. Specifically, when the drive rod 2102 extends, the arc-shaped ends of the two clamps 2103 rotate away from each other and then open to clamp the longitudinal reinforcement 15. When the drive rod 2102 shortens, the arc-shaped ends of the two clamps 2103 rotate close together. When the arc-shaped ends intersect, they can hug the longitudinal reinforcement 15 of the steel mesh, thereby confining the steel mesh.

[0059] In actual use, first open the clamp 2103, then hang the hook 20 on the longitudinal rib 15, and drive the clamp 2103 to hug the corresponding longitudinal rib 15 to achieve the positioning of the steel mesh. The main body of the clamp 2103 is a groove-shaped structure. Correspondingly, there are hinge ears and arc-shaped ends on both sides of the groove, thereby increasing the contact area with the longitudinal rib 15 and improving the fixing effect. Furthermore, the opening sides of the two clamps 2103 are opposite to each other and are hinged in an interlaced manner, so that there will be no movement interference when the two rotate relative to each other.

[0060] In an optional embodiment, the splicing bracket 6 is provided with a plurality of steel bar hooks 10 corresponding to the web steel mesh 5. The steel bar hooks 10 are arranged in an array and are used to clamp and fix the web steel mesh 5. Specifically, the steel bar hooks 10 are strip-shaped structures, with the middle of the steel bar hooks 10 hinged to the splicing bracket 6. One end of the steel bar hook 10 extends out of the inclined mounting surface and is bent upward into an L-shaped hook body after extending. The distance between the L-shaped hook body and the inclined mounting surface is adapted to the longitudinal reinforcement 15 of the web steel mesh 5. The splicing bracket 6 is provided with corresponding steel bar hooks. The stop block 16 at the other end of the 10 can limit the rotation angle of the rebar hook 10, so that the rebar hook 10 is kept extending out of the inclined assembly surface and forming a corresponding groove for the longitudinal bar 15 between the L-shaped hook body and the splicing bracket 6. This allows the web rebar mesh 5 to be supported by the rebar hook 10 and not to slide down. When the assembly is completed, the web rebar mesh 5 is pulled upward, and the longitudinal bar 15 of the web rebar mesh 5 is pulled upward and disengaged from the L-shaped hook body. As it is pulled upward, it touches the rebar hook 10. The rebar hook 10 rotates upward and retracts into the inclined assembly surface, so that the rebar cage can be lifted out smoothly.

[0061] In this embodiment, the inclined assembly surface of the splicing bracket 6 is provided with multiple corresponding rebar hooks 10 and assembly rods 14. The assembly rods 14 are located on the inclined assembly surface and on the plane of the inclined assembly surface. The multiple assembly rods 14 are evenly distributed along the length direction of the splicing bracket 6 to form a hollow structure corresponding to the rebar hooks 10 for installation of the rebar hooks 10. The side of the assembly rod 14 is provided with a hinge shaft extending along the length direction of the bottom reinforcement platform 9, so that the rebar hooks 10 can be rotated downward to extend out of the inclined assembly surface, or rotated upward to retract into the splicing bracket 6. The rebar hooks 10 are hinged to either side of the assembly rod 14 in the length direction of the bottom reinforcement platform 9 through the hinge shaft, so that they can be rotated out or retracted into the splicing bracket 6.

[0062] The hinge shaft is equipped with a torsion spring corresponding to the rebar hook 10. The torsion spring generates a torque on the rebar hook 10 through its own elastic potential energy, thereby driving the end of the rebar hook 10 away from the bottom reinforcement platform 9 to stick to the stop block 16 from bottom to top, thereby maintaining the tendency of the L-shaped hook body to extend out of the inclined assembly surface. In this way, after the rebar cage is lifted out, the rebar hook 103 is reset and can support the rebar mesh, thus facilitating the next use.

[0063] In this embodiment, a square frame corresponding to the splicing bracket 6 is provided on the outside of multiple assembly rods 14 to form a square grid. The square grid can serve as an inclined assembly surface and is used to support the web reinforcement mesh 5. The square grid is hinged to the splicing bracket 6 below by a hinge shaft extending along the length direction of the bottom reinforcement platform 9. Multiple adjustment rods are evenly distributed above the splicing bracket 6. The adjustment rods are hydraulic cylinders, which can adjust the tilt angle of the square grid to adapt to the web angle of the box girder with different tilt angles.

[0064] In addition to any of the above splicing devices, this application also provides a method for assembling box girder mesh panels in mid-air to achieve angle adjustment, thereby splicing the steel mesh panels of precast beams. Specific steps include:

[0065] Step S1: Tie the bottom plate steel mesh 8, web plate steel mesh 5 and top plate steel mesh 12 on the corresponding jig. After tying the bottom plate steel mesh 8, web plate steel mesh 5 and top plate steel mesh 12, do not tie the longitudinal bars 15 to the stirrups of the overlapping parts between the three. This can be achieved by splicing to form corresponding intersections, which facilitates the subsequent fixing and connection.

[0066] Preferably, the jig is positioned below the guide rail 1 on the side of the splicing trolley, and is thus lifted and transported by the gantry crane 4.

[0067] Step S2: The bottom slab steel mesh 8 is hoisted to the bottom reinforcement platform 9 using the overhead crane 4.

[0068] Step S3: Hoist the web steel mesh 5 to the corresponding position on the splicing platform 7, and then adjust the angle of the gantry crane 4 so that the web steel mesh 5 is parallel to the inclined assembly surface and placed on the splicing platform 7. This ensures that the web steel mesh 5 is spliced ​​at the set angle. Place the two web steel meshes 5 on the two splicing supports 6 one after another.

[0069] Step S4: After placing the corresponding web reinforcement mesh 5 on the two splicing platforms 7, push the two splicing platforms 7 toward the bottom reinforcement platform 9 by manual or motor drive, so that the web reinforcement mesh 5 and the bottom reinforcement mesh 8 intersect at the edge, and insert and fix the longitudinal reinforcement 15 at the intersection.

[0070] Step S5: The top slab steel mesh 12 is hoisted to the design position by the overhead crane 4. Longitudinal bars 15 are inserted and fixed at the intersection of the web steel mesh 5 and the top slab steel mesh 12 to form a precast steel cage. The steel cage is then hoisted out for use.

[0071] In another alternative embodiment, there are four longitudinal bars 15 at the intersection of the web reinforcement mesh 5 and the bottom plate reinforcement mesh 8. The four longitudinal bars 15 are respectively attached to the inner side of the four intersection points of the stirrups at the intersection, and then the inserted longitudinal bars 15 are tied or welded to fix them.

[0072] There are four longitudinal bars 15 at the intersection of the web reinforcement mesh 5 and the top slab reinforcement mesh 12. The four longitudinal bars 15 are respectively attached to the inside of the four intersection points of the stirrups at the intersection, and then the inserted longitudinal bars 15 are tied or welded to fix them.

[0073] In this embodiment, a limiting block 13 is placed on the splicing bracket 6 according to the shape of the top plate steel mesh. The limiting block 13 can be fixed by bolts. The main body of the splicing bracket 6 is a right-angled trapezoidal frame welded from square steel or channel steel, and the bottom is fixed to the splicing trolley by welding.

[0074] 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 box girder mesh assembly device that performs angle adjustment in mid-air, characterized in that, include: A bottom reinforcement platform, which is used to place the bottom slab steel mesh; The splicing platform is provided on both sides of the bottom reinforcement platform and moves back and forth along the width direction of the bottom reinforcement platform. A splicing bracket is provided above the splicing platform and the splicing bracket has an inclined assembly surface corresponding to the inclination angle of the box girder web. The gantry crane is a square truss corresponding to the web reinforcement mesh and the top reinforcement mesh. Hooks corresponding to the reinforcement mesh are arrayed on the lower surface of the gantry crane. A lifting mechanism is connected to the top of the gantry crane by a hinge. A traveling beam is connected to the top of the lifting mechanism. The two ends of the traveling beam travel on guide rails extending along the width direction of the bottom reinforcement platform. An angle adjustment device is provided between the lifting mechanism and the overhead crane to adjust the angles of the bottom plate steel mesh, the web plate steel mesh, and the top plate steel mesh; The overhead crane is connected to the hinged adjustment frame via multiple hinge points, and the adjustment frame is connected to the traveling beam via multiple lifting mechanisms. The adjustment frame is a square truss, and its length is adapted to the length of the overhead crane. Multiple hinge points are evenly distributed along the length of the overhead crane. Each hinge point is provided with the aforementioned angle adjustment device to drive the gantry crane to rotate around the hinge point; The angle adjustment device includes: A half-gear, which is fixed to the overhead crane; A drive gear meshes with the half gear and is driven by a first stepper motor; The drive gear is smaller than a half gear.

2. The box girder mesh assembly equipment for aerial angle adjustment according to claim 1, characterized in that, The two ends of the walking beam are supported on the guide rail by rollers. The guide rail is provided with a rail groove corresponding to the rollers. The rollers are connected to a second stepper motor for driving. Above the traveling beam is a support rail parallel to the guide rail, below the support rail is a guide strip with a dovetail-shaped cross-section, and above the traveling beam is a dovetail groove slidably mounted on the guide strip.

3. The box girder mesh assembly equipment for aerial angle adjustment according to claim 1, characterized in that, The gantry crane has a row of limiting clamps on each side of its width direction. Each limiting clamp includes a clamp body and a chuck. The clamp body has hinge slots extending from both sides, and the ends of the two hinge slots are hinged to the chucks. The rear ends of the chucks have hinge ears extending opposite each other. The hinge ears are hinged together by a pin, and the hinge ears have strip-shaped holes extending along the extension direction of the hinge ears corresponding to the pin. The front end of the chuck has an arc-shaped structure, and the end of the clamp body has a drive rod that is hinged to the pin. The drive rod extends and retracts to make the front ends of the chucks move closer together to close or move away from each other to open. The main body of the clamp is a groove-shaped structure, and the two clamps are hinged in an interlaced manner.

4. The box girder mesh assembly equipment for aerial angle adjustment according to claim 1, characterized in that, The splicing bracket has multiple steel bar hooks corresponding to the web steel mesh. The middle part of each steel bar hook is hinged to the splicing bracket. One end of each steel bar hook extends out of the inclined assembly surface and is bent upward into an L-shaped hook body. The splicing bracket is provided with a stop block above the other end of the steel bar hook to limit the rotation angle of the steel bar hook.

5. The box girder mesh assembly equipment for aerial angle adjustment according to claim 4, characterized in that, The inclined assembly surface of the splicing bracket is provided with a plurality of assembly rods corresponding to steel bar hooks. The steel bar hooks are hinged to any side of the assembly rods in the length direction of the bottom reinforcement platform via hinge shafts. The hinge shaft is provided with a torsion spring corresponding to the rebar hook, so as to drive the rebar hook to stick to the stop block and maintain the tendency of the L-shaped hook body to extend out of the inclined assembly surface.

6. A method for assembling box girder mesh panels with angle adjustment in mid-air, wherein the steel mesh panels are spliced ​​using the box girder mesh panel assembly equipment described in any one of claims 1-5, characterized in that, include: Step S1: Tie the bottom slab steel mesh, web steel mesh, and top slab steel mesh on the jig. Step S2: The bottom slab steel mesh is hoisted to the bottom reinforcement platform using a gantry crane; Step S3: Hoist the web reinforcement mesh to the splicing platform, adjust the angle of the web reinforcement mesh with a gantry crane so that the web reinforcement mesh is parallel to the inclined assembly surface and placed on the splicing platform; Step S4: After placing the corresponding web reinforcement mesh on the two splicing platforms, push the two splicing platforms toward the bottom reinforcement platform so that the edges of the web reinforcement mesh and the bottom reinforcement mesh intersect. Insert longitudinal reinforcement bars at the intersection and fix them. Step S5: The top slab steel mesh is hoisted to the design position using a gantry crane. Longitudinal bars are then threaded through the intersection of the web steel mesh and the top slab steel mesh and fixed to form a precast steel cage.

7. The method for assembling box girder mesh panels with angle adjustment in mid-air according to claim 6, characterized in that, There are four longitudinal bars at the intersection of the web reinforcement mesh and the bottom slab reinforcement mesh, and the four longitudinal bars are respectively attached to the inner side of the four intersection points. There are four longitudinal bars at the intersection of the web reinforcement mesh and the top slab reinforcement mesh, and the four longitudinal bars are respectively attached to the inner side of the four intersection points.

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