A linear control system for hoisting a prefabricated steel box girder

Abstract

The application discloses a prefabricated steel box girder hoisting linear control system, which comprises a steel box girder tower section base, a hoisting device, a double-hoisting-arm multi-direction adjusting hoist and a controller; the hoisting device comprises a cable hoist driving mechanism, the double-hoisting-arm multi-direction adjusting hoist is connected with the cable hoist driving mechanism and driven to move up and down by the cable hoist driving mechanism; the double-hoisting-arm multi-direction adjusting hoist comprises a first hoisting arm, a second hoisting arm, a first driving rod, a second driving rod and a central ball joint. The application is applied to the steel box girder hoisting construction system through the structural arrangement of the double-hoisting-arm multi-direction adjusting hoist, the steel box girder tower section can be adjusted in the hoisting process, the installation precision of the steel box girder tower section is controlled, the attitude of the steel box girder tower section is basically consistent with the design attitude, the linear control of in-site vertical splicing detection and on-site installation of the tower section steel box girder can be applicable, the workload of air adjustment is reduced, and the linear precision and construction quality of the overall structure are ensured.

Description

Technical Field

[0001] This invention relates to the field of steel box girder construction technology, and in particular to a linear control system for the hoisting of precast steel box girders. Background Technology

[0002] Steel box girders are a common structure in bridge engineering. Prefabricated by welding steel plates, they improve construction efficiency and shorten the construction period. In long-span cable-stayed bridge structures, the towers are often assembled sequentially from several prefabricated steel box girder sections. During the hoisting of these sections, they typically need to be installed at a certain angle, requiring precise linear control to ensure construction quality. Furthermore, these sections require pre-assembly at the factory to inspect their quality and ensure their alignment meets design standards. Therefore, designing a linear control system for the hoisting of prefabricated steel box girders to achieve linear control during the pre-assembly of these sections, enabling inspection and construction control, and ensuring construction quality, remains a challenging technical problem. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a linear control system for the hoisting of precast steel box girders, comprising a steel box girder tower section base, a hoisting device, a double-arm multi-directional adjustable hoisting tool, and a controller;

[0004] The lifting device includes a cable-driven mechanism, which connects to the double-boom multi-directional adjustable lifting device and drives its lifting and lowering motion.

[0005] The double-arm multi-directional adjustable lifting device includes a first arm, a second arm, a first drive rod, a second drive rod, and a central ball joint; the upper side of the central ball joint is provided with a first arc-shaped guide groove, the first arm is disposed in the first arc-shaped guide groove and driven by the first drive rod; the lower side of the central ball joint is provided with a second arc-shaped guide groove, the second arm is disposed in the second arc-shaped guide groove and driven by the second drive rod;

[0006] The controller is wirelessly connected to the dual-arm multi-directional adjustable lifting device and is used to control the movement of the first drive rod and the second drive rod.

[0007] As a further explanation of the present invention, the first drive rod and the second drive rod are hydraulic drive rods, and the first drive rod and the second drive rod are respectively disposed on both sides of the central ball joint.

[0008] Furthermore, the first boom and the second boom are arranged at an angle to each other on the central ball joint.

[0009] Furthermore, the dual-boom multi-directional adjustable lifting device includes a lifting device frame, in which the first boom and the second boom are installed.

[0010] Furthermore, lifting lugs are provided at both ends of the lower side of the first and second booms.

[0011] Furthermore, the steel box girder tower section base includes a steering mechanism.

[0012] Furthermore, the steering mechanism is a hydraulic jack device.

[0013] Furthermore, the steel box girder tower section base includes a limiting mechanism.

[0014] Furthermore, the limiting mechanism includes a limiting post and a fastening plate, the fastening plate being installed and fixed on the base of the steel box girder tower section, and the limiting post being disposed on the fastening plate.

[0015] The beneficial effects of this invention are:

[0016] This invention utilizes the structure of a double-arm multi-directional adjustable lifting device in a steel box girder hoisting construction system. During hoisting, the steel box girder tower sections can be adjusted on the platform surface, controlling the installation accuracy of the tower sections and ensuring that their posture is basically consistent with the design posture. This invention is applicable to the on-site erection and testing of tower section steel box girders and the linear control of on-site installation, reducing the amount of aerial adjustment work and ensuring the linear accuracy and construction quality of the overall structure. Attached Figure Description

[0017] Figure 1 This is a hoisting diagram illustrating the linear control system for hoisting precast steel box girders according to an embodiment of the present invention.

[0018] Figure 2 This is a diagram illustrating the control principle of the linear control system for the hoisting of precast steel box girders according to an embodiment of the present invention.

[0019] Figure 3 A diagram illustrating the arrangement of the first and second arc-shaped guide grooves in the cardiac segment according to an embodiment of the present invention;

[0020] Figure 4 This is a structural illustration of a double-arm multi-directional adjustable lifting device according to an embodiment of the present invention. Figure 1 ;

[0021] Figure 5 This is a structural illustration of a double-arm multi-directional adjustable lifting device according to an embodiment of the present invention. Figure 2 .

[0022] Reference numerals in the attached drawings: 1. Steel box girder tower section base; 2. Lifting device; 201. Cable lifting drive mechanism; 3. Double-arm multi-directional adjustable lifting device; 4. First tower section steel box girder; 5. Second tower section steel box girder; 6. First boom; 7. Second boom; 8. First drive rod; 9. Second drive rod; 10. Central ball joint; 11. First arc-shaped guide groove; 12. Second arc-shaped guide groove; 13. Steel wire rope; 14. Lifting device frame; 15. Lifting lug; 16. Hydraulic jack device; 17. Limiting mechanism. Detailed Implementation

[0023] Example:

[0024] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0025] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] As attached Figure 1-5 As shown, this embodiment of a linear control system for the hoisting of precast steel box girders includes a steel box girder tower section base 1, a hoisting device 2, a double-arm multi-directional adjustable hoisting device 3, and a controller. The steel box girder tower section base 1 is used to place and support the tower section steel box girder, and the tower section steel box girder placed on it is defined as the first tower section steel box girder 4. The hoisting device 2 has a cable hoisting drive mechanism 201, which connects to the double-arm multi-directional adjustable hoisting device 3 and drives its lifting and lowering movement. The tower section steel box girder hoisted by the double-arm multi-directional adjustable hoisting device 3 is defined as the second tower section steel box girder 5. The double-arm multi-directional adjustable hoisting device 3... The lifting device 3 includes a first boom 6, a second boom 7, a first drive rod 8, a second drive rod 9, and a central ball joint 10. The central ball joint 10 has a first arc-shaped guide groove 11 on its upper side, and the first boom 6 is disposed within the first arc-shaped guide groove 11 and driven by the first drive rod 8. The central ball joint 10 has a second arc-shaped guide groove 12 on its lower side, and the second boom 7 is disposed within the second arc-shaped guide groove 12 and driven by the second drive rod 9. The controller is wirelessly connected to the dual-boom multi-directional adjustable lifting device 3 and is used to control the movement of the first drive rod 8 and the second drive rod 9.

[0027] This invention utilizes the structure of a double-arm multi-directional adjustable lifting device 3 in a steel box girder hoisting construction system. During the hoisting process, the steel box girder tower sections can be adjusted on the platform surface to control the installation accuracy of the tower sections, ensuring that their posture is basically consistent with the design posture. This invention is applicable to the on-site erection and testing of tower section steel box girders and the linear control of on-site installation, reducing the amount of aerial adjustment work and ensuring the linear accuracy and construction quality of the overall structure.

[0028] In this embodiment, during the prefabricated steel box girder hoisting linear control system, the first tower section steel box girder 4 is supported and fixed on the steel box girder tower section base 1. The steel box girder tower section base 1 is pre-adjusted according to the design and installation parameters of the first tower section steel box girder 4 and the second tower section steel box girder 5. After the first tower section steel box girder 4 is placed and fixed, it is used as a reference. That is, the second tower section steel box girder 5 is hoisted and pre-assembled on the pre-assembly site to check whether the production and processing of the second tower section steel box girder 5 meets the design requirements. During the on-site erection and assembly test of the tower section steel box girder, the end face contact rate is checked with a feeler gauge after erection. The end face contact rate is used to evaluate whether the end face processing quality meets the factory requirements. When installing linear control on site, the steel box girder tower section base 1 can be a support and fixing structure on the construction site. Specifically, for how to achieve the attitude adjustment of the second tower section steel box girder 5 during hoisting, please refer to the appendix. Figure 2 As shown, lifting lugs are installed on the four corners of the second tower section steel box girder 5. The four corners are connected to the two ends of the first boom 6 and the second boom 7 of the double-boom multi-directional adjustable lifting device 3 via steel wire ropes 13. The four corners of the second tower section steel box girder 5 are designated as corner A, corner B, corner C, and corner D. During hoisting, if it is necessary to raise the A-corner side of the second tower section steel box girder 5, the first boom 6 can be kept stationary, and then the C-corner end of the second boom 7 can be lowered to raise the A-corner side of the second tower section steel box girder 5. To lower it, the operation is reversed. Following the same control method, the raising and lowering adjustment of any other single-corner side of the second tower section steel box girder 5 can be achieved. Alternatively, if it is necessary to raise the AB side of the second tower section steel box girder 5 during hoisting, the opposite ends of the first boom 6 and the second boom 7 can be lowered simultaneously. This operation allows for the raising and lowering adjustment control of any side of the second tower section steel box girder 5.

[0029] As described above, based on the structural configuration of the double-arm multi-directional adjustable lifting device 3 in this embodiment, on the one hand, in practical applications, the posture of the steel box girder can be adjusted remotely through the controller during the hoisting process, which is simple and efficient; on the other hand, for the linear control of this type of precast steel box girder hoisting construction, the adjustment range is generally not large, and the adjustment range of the double-arm multi-directional adjustable lifting device 3 in this embodiment can meet the actual linear control requirements.

[0030] In a preferred embodiment, the first drive rod 8 and the second drive rod 9 are hydraulic drive rods, and the first drive rod 8 and the second drive rod 9 are respectively located on both sides of the central ball joint 10. Although the power requirements for linear control drive force have been reduced through structural design in this embodiment, since the object being lifted is a large mass object such as a steel box girder, the drive adjustment still needs to prioritize stability and safety. The hydraulic drive rods, using hydraulic drive, are more stable and safer, and have a larger drive force, which can meet the drive requirements for lifting and adjusting such a large mass steel box girder. On the other hand, based on the structural setting of the double-arm multi-directional adjustable lifting device 3 described in this embodiment, the symmetrical arrangement of the first drive rod 8 and the second drive rod 9 is conducive to making full use of space and simplifying the lifting device structure.

[0031] See appendix Figure 4 As shown, in this embodiment, the first boom 6 and the second boom 7 are arranged at an angle to each other on the central ball joint 10. This structural arrangement allows the double boom multi-directional adjustable lifting device 3 of this embodiment to achieve the posture adjustment of any single angle side and any single side side of the second tower section steel box girder 5 with only at least two drive rods. This is beneficial to the simplification of the lifting device structure, the reduction of production and maintenance costs, the improvement of the safety of the lifting device, and the extension of its service life.

[0032] See appendix Figure 3-5 As shown, in this embodiment, the double-arm multi-directional adjustable lifting device 3 includes a lifting device frame 14, with the first arm 6 and the second arm 7 installed inside the lifting device frame 14. The lifting device frame 14 is welded from high-strength alloy steel and has an overall box-shaped structure, possessing excellent load-bearing capacity and deformation resistance. Multiple reinforcing ribs are provided inside to enhance the rigidity of the frame.

[0033] See appendix Figure 5 As shown, lifting lugs 15 are provided at both ends of the lower side of the first boom 6 and the second boom 7. The lifting lugs 15 are made of high-strength alloy steel plate, stamped and formed, with smooth and burr-free edges after grinding. The surface is coated with anti-rust paint to enhance corrosion resistance. They are used to thread high-strength steel wire ropes as lifting lines. One end of the steel wire rope can be firmly connected to the lifting lug 15 through a buckle, and the other end is connected to the box girder lifting lug of the second tower section steel box girder 5. Combined with the operation control of the controller on the double boom type multi-directional adjustable lifting device 3, the second tower section steel box girder 5 is lifted smoothly and accurately to the predetermined position. The entire lifting process relies on the load-bearing capacity of the lifting lugs and the operation of the lifting device 2 to ensure the stability and safety of the steel box girder during the lifting process and avoid swaying or collision.

[0034] See appendix Figure 1As shown, in this embodiment, the steel box girder tower section base 1 includes a steering mechanism for adjusting the orientation of the first tower section steel box girder 4. In this embodiment, the steering mechanism uses a hydraulic jack device 16, which is located at the lower part of the steel box girder tower section base 1. By lifting the steel box girder tower section base 1 to different positions, the orientation of the first tower section steel box girder 4 supported on it is adjusted.

[0035] See appendix Figure 1 As shown, in this embodiment, the steel box girder tower section base 1 includes a limiting mechanism 17 for restricting and positioning the first tower section steel box girder 4. The limiting mechanism 17 is symmetrically distributed on the steel box girder tower section base 1 and includes a limiting block and an mounting plate. The limiting block is made of high-strength alloy steel and is fixed to the steel box girder tower section base 1 by the mounting plate. After installation, the limiting block fits precisely against the sidewall contour of the first tower section steel box girder 4, ensuring accurate embedding and limiting the lateral movement of the steel box girder during installation, ensuring the stability and reliability of positioning, thereby guaranteeing the precise connection and overall stability of the entire tower section structure during splicing.

[0036] The above description only illustrates preferred embodiments of the present invention and should not be construed as limiting the scope of the claims. The present invention is not limited to the above embodiments, and variations in its specific structure are permitted. In short, all variations made within the scope of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. A linear control system for hoisting precast steel box girders, characterized in that: This includes the steel box girder tower section base, lifting device, double-arm multi-directional adjustable lifting tool, and controller; The lifting device includes a cable-driven mechanism, which connects to the double-boom multi-directional adjustable lifting device and drives its lifting and lowering motion. The double-arm multi-directional adjustable lifting device includes a first arm, a second arm, a first drive rod, a second drive rod, and a central ball joint; the upper side of the central ball joint is provided with a first arc-shaped guide groove, the first arm is disposed in the first arc-shaped guide groove and driven by the first drive rod; the lower side of the central ball joint is provided with a second arc-shaped guide groove, the second arm is disposed in the second arc-shaped guide groove and driven by the second drive rod; The controller is wirelessly connected to the dual-arm multi-directional adjustable lifting device and is used to control the movement of the first drive rod and the second drive rod. The first boom and the second boom are arranged at an angle to each other on the central ball joint.

2. The linear control system for hoisting precast steel box girders according to claim 1, characterized in that: The first drive rod and the second drive rod are hydraulic drive rods, and the first drive rod and the second drive rod are respectively located on both sides of the central ball joint.

3. The linear control system for hoisting precast steel box girders according to claim 1, characterized in that: The double-boom multi-directional adjustable lifting device includes a lifting device frame, and the first boom and the second boom are installed in the lifting device frame.

4. The linear control system for hoisting precast steel box girders according to claim 1, characterized in that: Lifting lugs are provided at both ends of the lower side of the first boom and the second boom.

5. The linear control system for hoisting precast steel box girders according to claim 1, characterized in that: The steel box girder tower section base includes a steering mechanism.

6. The linear control system for hoisting precast steel box girders according to claim 5, characterized in that: The steering mechanism is a hydraulic jack device.

7. The linear control system for hoisting precast steel box girders according to claim 1, characterized in that: The steel box girder tower section base includes a limiting mechanism.

8. The linear control system for hoisting precast steel box girders according to claim 7, characterized in that: The limiting mechanism includes a limiting post and a fastening plate. The fastening plate is installed and fixed on the base of the steel box girder tower section, and the limiting post is set on the fastening plate.

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