A lifting device for lifting a box girder reinforcement cage

Abstract

The utility model relates to hoisting tool related technical field discloses a kind of hoisting spreader for box girder reinforcement framework, including hoisting beam, the bottom of hoisting beam is provided with hoisting beam lifting point, the connecting end of hoisting beam lifting point is provided with common lifting point, the common lifting point connecting end is provided with roof lifting point, the bottom of hoisting beam is equipped with detection component, the roof lifting point, the hoisting beam lifting point and the common lifting point jointly constitute strength net rack structure.In the utility model, roof lifting point, hoisting beam lifting point and common lifting point adopt normal four-corner pyramid bolt connection ball node connection mode, form the space net rack structure with high integrity, high rigidity, can efficiently transfer and disperse each direction load in reinforcement framework hoisting process, significantly improve structural stability and carrying capacity, while using connecting plate improves the efficiency of installation.

Description

Technical Field

[0001] This utility model relates to the technical field of hoisting tools, and in particular to a hoisting tool for the steel reinforcement cage of a box girder. Background Technology

[0002] The steel reinforcement cage of a box girder is a steel reinforcement structural system used in bridge box girders. It is mainly composed of longitudinal bars, transverse bars, stirrups, and web bars. In concrete box girders, it plays a role in bearing tensile forces, enhancing structural stiffness, and controlling cracks. The steel reinforcement cage is usually pre-tied or welded before prefabrication or cast-in-place construction to ensure accurate bar placement and structural integrity. The rational design and arrangement of the steel reinforcement cage is the key to ensuring the load-bearing capacity, durability, and safety of the box girder.

[0003] Lifting equipment for box girder reinforcement cages is used to lift and position the reinforcement cages during construction. Common types include wire rope lifting equipment, clamp-type lifting equipment, and longitudinal upper chord lifting equipment. The lifting equipment must have sufficient load-bearing capacity and stability to ensure that the cage does not deform or slip during lifting. The arrangement of lifting points should be reasonable and is usually designed in conjunction with the cage structure and center of gravity. Selecting appropriate lifting equipment can improve lifting efficiency and ensure construction safety.

[0004] Traditional lifting equipment typically uses welded I-beam structures, which, while possessing a certain load-bearing capacity and stability, suffer from insufficient overall rigidity during the lifting of box girder reinforcement cages. This can easily lead to twisting and deformation of the reinforcement cages. Furthermore, unreasonable distribution of lifting points can cause localized stress concentrations, increasing the risk of hook or equipment breakage and posing significant safety hazards. Therefore, a new lifting equipment for box girder reinforcement cages is proposed to address these issues. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a lifting tool for the steel reinforcement cage of box girders, which aims to improve the problems in the prior art of insufficient overall rigidity and unreasonable distribution of lifting points during the lifting of the steel reinforcement cage of box girders, which easily leads to the torsion deformation and local stress concentration of the steel reinforcement cage.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A hoisting device for a box girder steel reinforcement cage includes a lifting beam, a lifting beam lifting point at the bottom of the lifting beam, a common lifting point at the connecting end of the lifting beam lifting point, a top plate lifting point at the connecting end of the common lifting point, and a detection component installed at the bottom of the lifting beam. The top plate lifting point, the lifting beam lifting point, and the common lifting point together form a strength grid structure.

[0008] As a further description of the above technical solution:

[0009] The top plate suspension point includes an upper chord ball, a longitudinal upper chord, a transverse upper chord, a diagonal bar, and a connecting plate. The longitudinal upper chord, the transverse upper chord, and the diagonal bar are all connected to the upper chord ball. The end of the longitudinal upper chord is provided with a connecting plate.

[0010] As a further description of the above technical solution:

[0011] The lifting beam lifting point includes an upper chord ball two and a diagonal bar two, with the diagonal bar two connected to the upper chord ball two;

[0012] As a further description of the above technical solution:

[0013] The common suspension point includes an upper chord ball three, a longitudinal upper chord rod two, a transverse upper chord rod two, and a connecting plate two. The longitudinal upper chord rod two and the transverse upper chord rod two are both connected to the upper chord ball three. The end of the longitudinal upper chord rod two is provided with a connecting plate two.

[0014] As a further description of the above technical solution:

[0015] The second upper chord ball is installed at the bottom of the lifting beam, the second diagonal bar is bolted to the third upper chord ball, and the second longitudinal upper chord bar and the first longitudinal upper chord bar are connected to each other through the second connecting plate and the first connecting plate.

[0016] As a further description of the above technical solution:

[0017] The detection assembly includes a strain gauge, which is installed at the bottom of the lifting beam. A displacement sensor and an attitude sensor are also installed at the bottom of the lifting beam.

[0018] As a further description of the above technical solution:

[0019] The strain gauge is positioned on the lifting beam near the upper chord ball II, and the displacement sensor is positioned vertically between the lifting beam and the transverse upper chord II.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the top plate lifting point, the lifting beam lifting point and the common lifting point adopt the ball node connection method of the square pyramid bolt connection, forming a spatial grid structure with strong integrity and high rigidity. It can efficiently transfer and disperse the loads in all directions during the hoisting process of the steel skeleton, significantly improve the structural stability and bearing capacity, and at the same time use the connecting plate to improve the installation efficiency.

[0022] 2. In this utility model, the integrated application of strain gauges, displacement sensors and attitude sensors enables real-time monitoring and early warning of the force on the lifting equipment, the displacement of the space frame and the lifting attitude, ensuring that the lifting process is stable and controlled, avoiding risks such as structural deformation, tilting or overload, and improving the safety and accuracy of lifting operations. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of a hoisting tool for the steel reinforcement cage of a box girder proposed in this utility model;

[0024] Figure 2 This is a structural schematic diagram of the top plate lifting point of a hoisting tool for the steel reinforcement cage of a box girder, as proposed in this utility model.

[0025] Figure 3 This is a schematic diagram of the lifting beam lifting point of a lifting device for a box girder steel reinforcement cage proposed in this utility model;

[0026] Figure 4 This is a structural schematic diagram of a common lifting point for a lifting device used for the steel reinforcement cage of a box girder, as proposed in this utility model.

[0027] Figure 5 This is a structural schematic diagram of a strain gauge for a lifting device used in the hoisting of a box girder reinforcement cage, as proposed in this utility model.

[0028] Legend:

[0029] 1. Lifting beam; 2. Top plate lifting point; 201. Upper chord ball one; 202. Longitudinal upper chord one; 203. Transverse upper chord one; 204. Diagonal bar one; 205. Connecting plate one; 3. Lifting beam lifting point; 301. Upper chord ball two; 302. Diagonal bar two; 4. Common lifting point; 401. Upper chord ball three; 402. Longitudinal upper chord two; 403. Transverse upper chord two; 404. Connecting plate two; 5. Strain gauge; 6. Displacement sensor; 7. Attitude sensor. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figures 1-4The present invention provides an embodiment of a hoisting tool for a box girder steel reinforcement cage, comprising a hoisting beam 1, a hoisting beam lifting point 3 at the bottom of the hoisting beam 1, a common lifting point 4 at the connecting end of the hoisting beam lifting point 3, a top plate lifting point 2 at the connecting end of the common lifting point 4, and a detection component installed at the bottom of the hoisting beam 1. The top plate lifting point 2, the hoisting beam lifting point 3, and the common lifting point 4 together form a strength grid structure. The top plate suspension point 2 includes an upper chord ball 201, a longitudinal upper chord bar 202, a transverse upper chord bar 203, a diagonal bar 204, and a connecting plate 205. The upper chord ball 201 is forged from 40CrMnMo alloy steel and nitrided to effectively enhance its hardness and strength. The longitudinal upper chord bar 202, the transverse upper chord bar 203, and the diagonal bar 204 are all connected to the upper chord ball 201. The top plate suspension point 2 uses a square pyramid bolt connection ball joint connection method. The end of the longitudinal upper chord bar 202 is provided with a connecting plate 205. By setting the connecting plate 205, the top plate suspension point 2 can be quickly connected to another top plate suspension point 2 or a shared suspension point 4. The lifting beam lifting point 3 includes an upper chord ball 301 and a diagonal bar 302. The upper chord ball 301 is forged from 40CrMnMo alloy steel and nitrided to effectively enhance its hardness and strength. The diagonal bar 302 is connected to the upper chord ball 301. The lifting beam lifting point 3 uses a square pyramid bolt connection ball node connection method. The common lifting point 4 includes an upper chord ball 401, a longitudinal upper chord 402, a transverse upper chord 403, and a connecting plate 404. The upper chord ball 401 is forged from 40CrMnMo alloy steel and nitrided to effectively enhance its hardness and strength. The longitudinal upper chord 402 and the transverse upper chord 403 are both connected to the upper chord ball 401. The common lifting point 4 uses a square pyramid bolt connection ball joint method. The end of the longitudinal upper chord 402 is provided with a connecting plate 404. Through the connecting plate 404, the common lifting point 4 can be quickly connected to the top plate lifting point 2, the lifting beam lifting point 3, or another common lifting point 4. The second upper chord ball 301 is installed at the bottom of the lifting beam 1. The lifting beam 1 is connected to the space frame structure through the lifting beam lifting point 3. The second diagonal bar 302 is bolted to the third upper chord ball 401. The second longitudinal upper chord bar 402 and the first longitudinal upper chord bar 202 are connected to each other through the second connecting plate 404 and the first connecting plate 205. Through the cooperation of different diagonal bars and connecting plates, the balls at each lifting point are connected to each other.

[0032] Reference Figure 1 and Figure 5The detection components include strain gauge 5, which is installed at the bottom of the lifting beam 1. Displacement sensor 6 and attitude sensor 7 are installed at the bottom of the lifting beam 1. Strain gauge 5, displacement sensor 6 and attitude sensor 7 detect the status of the lifting equipment and provide feedback. Strain gauge 5 is positioned on the lifting beam 1 near the upper chord ball 301. Strain gauge 5 monitors the stress changes generated by the lifting equipment in real time during the lifting process to determine whether there is overload or local overstress. Displacement sensor 6 is positioned vertically between the lifting beam 1 and the transverse upper chord 403. Displacement sensor 6 monitors the sagging, lateral displacement or deformation of the grid structure in real time during the lifting process. Attitude sensor 7 detects the change in tilt angle during the lifting process to ensure the stability of the lifting posture.

[0033] Working principle: The top plate lifting point 2, lifting beam lifting point 3, and common lifting point 4 are all connected by square pyramid bolts to form ball joints. This connection method makes the overall structure have high rigidity and good stability, and can effectively distribute and transfer external loads. The multiple top plate lifting points 2, lifting beam lifting points 3, and common lifting points 4 form a high-strength grid structure. The node spheres are quickly connected by connecting plate 1 205 and connecting plate 2 404, which improves construction efficiency.

[0034] Strain gauge 5 measures the minute deformation of the metal under stress and converts it into an electrical signal to reflect the stress on the lifting equipment. Displacement sensor 6 uses resistance, photoelectric or wire mechanism to detect the relative displacement of the space frame structure during the lifting process. Attitude sensor 7 senses the tilt angle and spatial attitude of the lifting equipment through gyroscope or accelerometer to monitor the balance state during lifting. The three work together to realize safety monitoring and early warning of the entire lifting process.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lifting device for a box girder reinforcement cage, comprising a lifting beam (1), characterized in that: The bottom of the lifting beam (1) is provided with lifting beam lifting points (3), the connecting end of the lifting beam lifting points (3) is provided with common lifting points (4), the connecting end of the common lifting points (4) is provided with top plate lifting points (2), the bottom of the lifting beam (1) is equipped with detection components, and the top plate lifting points (2), the lifting beam lifting points (3) and the common lifting points (4) together form a strength grid structure.

2. The lifting device for the steel reinforcement cage of a box girder according to claim 1, characterized in that: The top plate suspension point (2) includes an upper chord ball (201), a longitudinal upper chord rod (202), a transverse upper chord rod (203), a diagonal rod (204), and a connecting plate (205). The longitudinal upper chord rod (202), the transverse upper chord rod (203), and the diagonal rod (204) are all connected to the upper chord ball (201). The end of the longitudinal upper chord rod (202) is provided with a connecting plate (205).

3. The lifting device for the steel reinforcement cage of a box girder according to claim 2, characterized in that: The lifting beam lifting point (3) includes an upper chord ball (301) and a diagonal bar (302), the diagonal bar (302) being connected to the upper chord ball (301).

4. A hoisting tool for a box girder reinforcement cage according to claim 3, characterized in that: The common suspension point (4) includes an upper chord ball three (401), a longitudinal upper chord rod two (402), a transverse upper chord rod two (403) and a connecting plate two (404). The longitudinal upper chord rod two (402) and the transverse upper chord rod two (403) are both connected to the upper chord ball three (401). The end of the longitudinal upper chord rod two (402) is provided with a connecting plate two (404).

5. A hoisting tool for a box girder reinforcement cage according to claim 4, characterized in that: The second upper chord ball (301) is installed at the bottom of the lifting beam (1), the second diagonal bar (302) is bolted to the third upper chord ball (401), and the second longitudinal upper chord bar (402) and the first longitudinal upper chord bar (202) are connected to each other through the second connecting plate (404) and the first connecting plate (205).

6. A lifting device for a box girder reinforcement cage according to claim 5, characterized in that: The detection assembly includes a strain gauge (5) installed at the bottom of the lifting beam (1), and a displacement sensor (6) and an attitude sensor (7) are installed at the bottom of the lifting beam (1).

7. A hoisting tool for a box girder reinforcement cage according to claim 6, characterized in that: The strain gauge (5) is located on the lifting beam (1) near the upper chord ball (301), and the displacement sensor (6) is located vertically between the lifting beam (1) and the transverse upper chord (403).

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