Steel box girder assembling support and using method thereof

Abstract

The steel box girder assembling support comprises a base, the upper end of the base is connected with at least one row of supporting stand columns, the upper ends of the supporting stand columns are fixedly connected with a supporting bracket, and the supporting bracket is connected with a plurality of supporting piers; movable grooves are formed in the two ends of the supporting bracket, an adjusting through hole is formed in the position, between the movable grooves in the two sides, of the supporting bracket, L-shaped positioning columns are slidably connected into the movable grooves in the two sides, centering adjusting mechanisms for driving the L-shaped positioning columns on the two sides to relatively slide are arranged in the adjusting through hole, telescopic grooves are formed in the upper ends of the L-shaped positioning columns, and positioning insertion blocks are slidably inserted into the telescopic grooves; first hydraulic cylinders are connected into the telescopic grooves, flange plate supporting arms are hinged to the inner sides of the L-shaped positioning columns, swing arm mechanisms for driving the flange plate supporting arms to swing are arranged on the L-shaped positioning columns, and positioning pressing plates are detachably arranged above the positioning insertion blocks on the two sides. By means of the method, lateral restraining and transverse positioning of the steel box girder segments can be provided during steel box girder construction, the splicing position can be conveniently and rapidly determined, and the splicing efficiency is greatly improved.

Description

Technical Field

[0001] The present application belongs to the technical field of steel box girder assembly brackets, and specifically relates to a steel box girder assembly bracket and a method for using the same. Background Art

[0002] Steel box girders (also known as steel plate box girders), the core load-bearing components of long-span bridges, utilize a closed box-section design. They offer high torsional rigidity, light weight, and strong spanning capacity, making them widely used in modern bridge projects such as suspension and cable-stayed bridges. During the construction of steel box girder bridges, steel box girder segments require temporary support, spatial positioning, and posture adjustment using assembled brackets to ensure precise alignment between welded or bolted sections.

[0003] Traditional steel box girder assembly brackets usually only have a bottom support system and lack effective lateral constraints and transverse positioning functions. As a result, the steel box girder segments need to be frequently adjusted with the help of lifting equipment during the installation process, which seriously restricts the installation efficiency and accuracy. Summary of the Invention

[0004] The present application provides a steel box girder assembly bracket and a method for using the same, which can further provide lateral constraints and transverse positioning of steel box girder segments during steel box girder construction, facilitate rapid determination of assembly positions, and greatly improve assembly efficiency.

[0005] In order to achieve the above application objectives, this application provides the following technical solutions:

[0006] The cam is fixedly provided with a base, and the upper end of the base is fixedly connected to the base, and the upper end of the base is fixedly connected to the support bracket, and the upper end of the base is fixedly connected to the support bracket. The support bracket is provided with a movable slot at each end, and an adjustment through-hole is provided on the support bracket between the movable slots on both sides. The movable slots on both sides are slidably connected to the L-shaped positioning columns on both sides. The adjusting through-hole is provided with a centering adjustment mechanism that drives the L-shaped positioning columns on both sides to slide relative to each other. The upper end of the L-shaped positioning columns is provided with a telescopic slot, and a positioning plug is slidably inserted in the telescopic slot. The telescopic slot is fixedly connected to a first hydraulic cylinder that drives the positioning plug to move up and down. The inner side of the L-shaped positioning columns is hinged with flange plate support arms, and the L-shaped positioning columns are provided with a swing arm mechanism that drives the flange plate support arms to swing, and a positioning pressure plate is detachably provided above the positioning plugs on both sides.

[0007] Furthermore, both ends of the positioning pressure plate are provided with strip-shaped adjustment holes, and fixing bolts are inserted into the strip-shaped adjustment holes. The upper end of the positioning plug is provided with a fixing screw hole that cooperates with the fixing bolt, and the positioning pressure plate is connected to the fixing screw hole through the fixing bolt.

[0008] Furthermore, the centering adjustment mechanism includes an adjusting gear rotatably connected to the center of the adjusting through hole, and one end of the L-shaped positioning column on both sides is fixedly connected to a rack extending into the adjusting through hole and engaging with the gear, and the racks on both sides are arranged symmetrically with the center, and the lower end of the support bracket is fixedly connected to a motor that drives the gear to rotate.

[0009] Furthermore, a second hydraulic cylinder arranged vertically is fixedly connected to the positioning plug block, and a positioning clamping plate is fixedly connected to the output end of the second hydraulic cylinder.

[0010] Furthermore, the swing arm mechanism includes a third hydraulic cylinder hinged to both sides of the L-shaped positioning column, and both sides of the flange plate support arm are fixedly connected to adjustment columns, and the output ends of the third hydraulic cylinder on both sides are hinged to the adjustment columns.

[0011] Furthermore, the support pier includes a support seat fixedly connected to the upper end of the support bracket, the upper end of the support seat is provided with a steel sand trough, the steel sand trough is provided with fine steel sand, the upper end of the steel sand trough is slidably connected with a support platform, and a discharge valve is provided on one side of the support seat.

[0012] Furthermore, reinforcing ribs are provided between each of the supporting columns.

[0013] Furthermore, the positioning pressure plate is threadedly connected to at least one clamping bolt, and the lower end of the clamping bolt is rotatably connected to a pressure plate.

[0014] The present application provides a method for using a steel box girder assembly bracket. According to the size of the steel box girder, the first hydraulic cylinders on both sides are started to push the positioning plugs up and down to adjust the height of the positioning splints on both sides. The gear is then driven by the driving motor to rotate forward or reverse. The gear drives the racks on both sides to slide along the inner wall of the adjustment through hole. The racks pull the L-shaped positioning columns on both sides to slide along the inner wall of the movable groove, so that the L-shaped positioning columns on both sides are close to or away from each other. If the width of the steel box girder is too small, that is, when the L-shaped positioning columns on both sides are close to each other to the limit position, the second hydraulic cylinders on both sides are started to push the positioning splints on both sides to move closer to each other, so as to limit the width direction of the steel box girder. Fine steel sand is quantitatively added into the steel sand trough, and after the addition is completed, the support platform is inserted into the steel sand trough , adjust the support height of the steel box girder, use the crane to hoist the steel box girder to the support brackets on both sides, place the ends of the flange plates on both sides between the positioning clamps on both sides, start the second hydraulic cylinders on both sides to push the positioning clamps on both sides to press against the ends of the flange plates of the steel box girder, and then start the third hydraulic cylinders on both sides to push the flange plate support arms on both sides to swing, supporting the bottom surfaces of the flange plates on both sides of the steel box girder, and at the same time place the positioning pressure plates on the upper ends of the positioning plugs on both sides, pass the fixing bolts on both sides through the strip adjustment holes and screw them into the fixing screw holes, so that the lower ends of the nuts of the fixing bolts are pressed against the upper ends of the positioning pressure plates, and then tighten the tightening bolts to push the pressure plates against the upper end face of the steel box girder to achieve positioning and clamping of the steel box girder to prevent it from shifting during welding.

[0015] Compared with the prior art, the steel box girder assembly bracket described in the present application has a novel and reasonable structure. In conjunction with its usage method, the L-shaped positioning columns on both sides are driven close to each other through the centering adjustment mechanism, thereby limiting the ends of the flange plates on both sides of the steel box girder. The swing mechanisms on both sides are started to drive the flange plate support arms on both sides to swing, so that the flange plate support arms on both sides support the inclined bottom surfaces of the flange plates on both sides of the steel box girder, further providing lateral constraints and lateral positioning, facilitating the rapid determination of the assembly position, and greatly improving the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of a steel box girder assembly bracket structure of the present application;

[0017] Figure 2 This is a cross-sectional view of a steel box girder assembly bracket of the present application;

[0018] Figure 3 This is an exploded view of a steel box girder assembly bracket of the present application;

[0019] Figure 4 This is a structural schematic diagram of a centering adjustment mechanism for a steel box girder assembly bracket of the present application.

[0020] In the figure: 1. Base; 2. Support column; 3. Reinforcement rib column; 4. Support bracket; 5. Movable groove; 6. L-shaped positioning column; 7. Positioning plug; 8. First hydraulic cylinder; 9. Second hydraulic cylinder; 10. Positioning clamp; 11. Third hydraulic cylinder; 12. Flange plate support arm; 13. Motor; 14. Rack; 15. Gear; 16. Support seat; 17. Support platform; 18. Positioning pressure plate; 19. Strip adjustment hole; 20. Fixing bolt; 21. Fixing screw hole; 22. Tightening bolt; 23. Pressing plate; 24. Adjustment through hole. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application. Unless otherwise defined, the technical terms or scientific terms used herein should have the common meanings understood by people with ordinary skills in the field to which this disclosure belongs. The terms "upper", "lower", "left", "right", "front", "back", etc. used in the patent application specification and claims of this disclosure are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship also changes accordingly. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Anything not described in detail in this application is well known to those skilled in the art.

[0022] Example 1:

[0023] Please refer to Figure 1-4 The present application discloses a steel box girder assembly support, comprising a base 1, with at least one row of support columns 2 fixedly connected to its upper end. A support bracket 4 is fixedly connected to the upper end of at least one row of support columns 2. A plurality of support piers are fixedly connected to the support bracket 4. The support piers include a support seat 16 fixedly connected to the upper end of the support bracket 4. A steel shot trough containing fine steel shot is provided at the upper end of the support seat 16. A support platform 17 is slidably inserted into the upper end of the steel shot trough. A discharge valve is provided on one side of the support seat 16. Reinforcement ribs 3 may also be provided between each support column 2.

[0024] Each end of the support bracket 4 is provided with a movable slot 5. An adjustment hole 24 is provided on the support bracket 4 between the movable slots 5. L-shaped positioning posts 6 are slidably connected to each movable slot 5. A centering adjustment mechanism is provided within the adjustment hole 24 to drive the L-shaped positioning posts 6 to slide relative to each other. In a preferred embodiment, the centering adjustment mechanism includes an adjustment gear 15 rotatably connected to the center of the adjustment hole 24. A rack 14 extending into the adjustment hole 24 and meshing with the gear 15 is fixedly connected to one end of each L-shaped positioning post 6. The racks 14 are arranged symmetrically on both sides of the support bracket 4. A motor 13 is fixedly connected to the lower end of the support bracket 4 to drive the gear 15.

[0025] A telescopic slot is provided at the upper end of the L-shaped positioning column 6, in which a positioning plug 7 is slidably inserted, and a first hydraulic cylinder 8 for driving the positioning plug 7 to move up and down is fixedly connected in the telescopic slot. Flange plate support arms 12 are hinged on the inner sides of the L-shaped positioning column 6, and a swing arm mechanism for driving the flange plate support arms 12 to swing is provided on the L-shaped positioning column 6. Positioning pressure plates 18 are detachably provided above the positioning plugs 7 on both sides.

[0026] Both ends of the positioning pressure plate 18 are provided with strip adjustment holes 19, and fixing bolts 20 are inserted into the strip adjustment holes 19. The upper end of the positioning plug 7 is provided with fixing screw holes 21 that cooperate with the fixing bolts 20. The positioning pressure plate 18 is connected to the fixing screw holes 21 through the fixing bolts 20.

[0027] A vertically arranged second hydraulic cylinder 9 is fixedly connected to the positioning plug block 7 , and a positioning clamping plate 10 is fixedly connected to the output end of the second hydraulic cylinder 9 .

[0028] The swing arm mechanism includes a third hydraulic cylinder 11 hinged to both sides of the L-shaped positioning column 6. Both sides of the flange plate support arm 12 are fixedly connected to adjustment columns, and the output ends of the third hydraulic cylinder 11 on both sides are hinged to the adjustment columns.

[0029] At least one clamping bolt 22 is threadedly connected to the positioning pressure plate 18 , and a pressure piece 23 is rotatably connected to the lower end of the clamping bolt 22 .

[0030] Example 2:

[0031] In Example 1, a method for using a steel box girder assembly bracket is provided. According to the size of the steel box girder, the first hydraulic cylinders 8 on both sides are started to push the positioning plugs 7 up and down to adjust the height of the positioning splints 10 on both sides, and then the gear 15 is driven by the driving motor 13 to rotate forward or reverse. The gear 15 drives the racks 14 on both sides to slide along the inner wall of the adjustment through hole 24. The racks 14 pull the L-shaped positioning columns 6 on both sides to slide along the inner wall of the movable groove 5, so that the L-shaped positioning columns 6 on both sides are close to or away from each other; if the width of the steel box girder is too small, that is, when the L-shaped positioning columns 6 on both sides are close to each other to the limit position, the second hydraulic cylinders 9 on both sides are started to push the positioning splints 10 on both sides to move closer to each other, so as to limit the width direction of the steel box girder; fine steel sand is quantitatively added into the steel sand trough, and after the addition is completed, the support platform 17 is inserted into the steel sand trough , adjust the support height of the steel box girder, use the crane to hoist the steel box girder to the supporting brackets 4 on both sides, place the ends of the flange plates on both sides between the positioning clamps 10 on both sides, start the second hydraulic cylinders 9 on both sides to push the positioning clamps 10 on both sides to press against the ends of the flange plates of the steel box girder, and then start the third hydraulic cylinders 11 on both sides to push the flange plate support arms 12 on both sides to swing, supporting the bottom surfaces of the flange plates on both sides of the steel box girder. At the same time, place the positioning pressure plate 18 on the upper ends of the positioning plugs 7 on both sides, pass the fixing bolts 20 on both sides through the strip adjustment holes 19 and screw them into the fixing screw holes 21, so that the lower ends of the nuts of the fixing bolts 20 are pressed against the upper ends of the positioning pressure plates 18, and then tighten the tightening bolts 22 to push the pressing plate 23 against the upper end face of the steel box girder to achieve positioning and clamping of the steel box girder to prevent it from shifting during welding.

Claims

1. A steel box girder assembly bracket, characterized by: It comprises a base (1), the upper end of the base (1) is fixedly connected to at least one row of support columns (2), the upper end of at least one row of support columns (2) is fixedly connected to a support bracket (4), and the support bracket (4) is fixedly connected to a plurality of support piers; Both ends of the support bracket (4) are provided with movable grooves (5), and an adjustment through hole (24) is provided on the support bracket (4) between the movable grooves (5) on both sides. L-shaped positioning columns (6) are slidably connected in the movable grooves (5) on both sides, and a centering adjustment mechanism for driving the L-shaped positioning columns (6) on both sides to slide relative to each other is provided in the adjustment through hole (24). A telescopic groove is provided at the upper end of the L-shaped positioning column (6), and a positioning plug (7) is slidably inserted in the telescopic groove. A first hydraulic cylinder (8) for driving the positioning plug (7) to move up and down is fixedly connected in the telescopic groove. Flange plate support arms (12) are hinged on the inner sides of the L-shaped positioning columns (6), and a swing arm mechanism for driving the flange plate support arms (12) to swing is provided on the L-shaped positioning columns (6). Positioning pressure plates (18) are detachably provided above the positioning plugs (7) on both sides.

2. The steel box girder assembly bracket according to claim 1, characterized in that: Both ends of the positioning pressure plate (18) are provided with strip-shaped adjustment holes (19), and fixing bolts (20) are inserted into the strip-shaped adjustment holes (19). The upper end of the positioning plug (7) is provided with fixing screw holes (21) that cooperate with the fixing bolts (20), and the positioning pressure plate (18) is connected to the fixing screw holes (21) via the fixing bolts (20).

3. The steel box girder assembly bracket according to claim 1, characterized in that: The centering adjustment mechanism includes an adjustment gear (15) rotatably connected to the center of the adjustment through hole (24), one end of the L-shaped positioning column (6) on both sides is fixedly connected to a rack (14) extending into the adjustment through hole (24) and meshing with the gear (15), the racks (14) on both sides are arranged in a centrally symmetrical manner, and the lower end of the support bracket (4) is fixedly connected to a motor (13) for driving the gear (15) to rotate.

4. The steel box girder assembly bracket according to claim 1, characterized in that: A second hydraulic cylinder (9) arranged vertically is fixedly connected to the positioning plug block (7), and a positioning clamping plate (10) is fixedly connected to the output end of the second hydraulic cylinder (9).

5. The steel box girder assembly bracket according to claim 1, characterized in that: The swing arm mechanism comprises a third hydraulic cylinder (11) hinged to both sides of the L-shaped positioning column (6), and both sides of the flange plate support arm (12) are fixedly connected to adjustment columns, and the output ends of the third hydraulic cylinder (11) on both sides are hinged to the adjustment columns.

6. The steel box girder assembly bracket according to claim 1, characterized in that: The support pier includes a support seat (16) fixedly connected to the upper end of the support bracket (4), the upper end of the support seat (16) is provided with a steel sand trough, the steel sand trough is provided with fine steel sand, the upper end of the steel sand trough is slidably connected with a support platform (17), and one side of the support seat (16) is provided with a discharge valve.

7. The steel box girder assembly bracket according to claim 1, characterized in that: Reinforcement ribs (3) are provided between each of the support columns (2).

8. The steel box girder assembly bracket according to claim 2, characterized in that: The positioning pressure plate (18) is threadedly connected to at least one clamping bolt (22), and the lower end of the clamping bolt (22) is rotatably connected to a pressure piece (23).

9. The method for using the steel box girder assembly bracket according to any one of claims 1 to 8, characterized in that: According to the size of the steel box girder, the first hydraulic cylinders (8) on both sides are started to push the positioning plugs (7) up and down to adjust the height of the positioning splints (10) on both sides, and then the gear (15) is driven by the driving motor (13) to rotate forward or reverse, and the gear (15) drives the racks (14) on both sides to slide along the inner wall of the adjustment through hole (24), and the racks (14) pull the L-shaped positioning columns (6) on both sides to slide along the inner wall of the movable groove (5), so that the L-shaped positioning columns (6) on both sides are close to or away from each other; if the width of the steel box girder is too small, that is, when the L-shaped positioning columns (6) on both sides are close to each other to the limit position, the second hydraulic cylinders (9) on both sides are started to push the positioning splints (10) on both sides to move closer to each other, and limit the width direction of the steel box girder; fine steel sand is quantitatively added to the steel sand trough, and after the addition is completed, the support platform (17) is inserted into the steel sand trough to adjust the support of the steel box girder. The steel box beam is hoisted onto the support brackets (4) on both sides by a crane, and the ends of the flange plates on both sides are placed between the positioning clamps (10) on both sides. The second hydraulic cylinders (9) on both sides are started to push the positioning clamps (10) on both sides to press against the ends of the flange plates of the steel box beam. The third hydraulic cylinders (11) on both sides are started to push the flange plate support arms (12) on both sides to swing, and the bottom surfaces of the flange plates on both sides of the steel box beam are supported. At the same time, the positioning pressure plate (18) is placed on the upper ends of the positioning plugs (7) on both sides, and the fixing bolts (20) on both sides are passed through the strip adjustment holes (19) and screwed into the fixing screw holes (21), so that the lower ends of the nuts of the fixing bolts (20) are pressed against the upper ends of the positioning pressure plates (18), and then the tightening bolts (22) are screwed to push the pressure plate (23) against the upper end surface of the steel box beam, so as to realize the positioning and clamping of the steel box beam and prevent it from being offset during welding.

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