Steel box girder hoisting device for bridge construction

Abstract

The utility model relates to the technical field of bridge construction, in particular to a steel box girder hoisting device for bridge construction, which comprises a support beam, hoisting rings arranged at two ends of the support beam, an adjusting rod rotatably connected to the top surface of the support beam, a driving mechanism mounted on the support beam, external threads arranged at two ends of the adjusting rod, and threads arranged at two ends of the adjusting rod in opposite directions. The two ends of the adjusting rod are in threaded connection with guide rods, one end of each guide rod is fixedly connected with a vertical plate, the vertical plate is fixedly connected with a transverse plate, the transverse plate is hinged to a clamping plate, the transverse plate is in threaded connection with a threaded rod, and a supporting plate is arranged at the top end of the threaded rod. By means of the hinged design of the clamping plate and the transverse plate, the clamping plate can automatically adjust the clamping posture along with the inclination angle of the inclined web, so that it can be ensured that the clamping plate is attached to the inclined web in a self-adaptive mode, then the supporting plate is jacked through the screw rod so as to abut against the flange plate, synchronous supporting of the inclined web and the flange plate can be formed, and the clamping effect is good. Therefore, the deformation condition of the steel box girder can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, specifically to a steel box girder hoisting device for bridge construction. Background Technology

[0002] Steel box girders, also known as steel plate box girders, are a common structural form for long-span bridges. They are generally used on bridges with large spans. Due to their large weight and volume, steel box girders usually require the use of cranes for installation.

[0003] Traditional steel box girder hoisting often uses fixed clamps or cable binding methods. However, the angle of the inclined web of the steel box girder varies due to different designs, and traditional clamps cannot adaptively adjust the clamping angle, which can easily lead to unstable clamping or damage to the surface of the girder. Furthermore, some clamps apply local force to the flange plates of the steel box girder during hoisting, which can easily cause deformation of the steel box girder. Therefore, there are still shortcomings and deficiencies in the existing technology. Utility Model Content

[0004] This invention provides a steel box girder hoisting device for bridge construction to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a steel box girder hoisting device for bridge construction, including a horizontally arranged support beam, symmetrically arranged lifting rings at both ends of the support beam, a horizontally arranged adjusting rod rotatably connected to the top surface of the support beam, a drive mechanism for driving the adjusting rod to rotate installed on the support beam, external threads at both ends of the adjusting rod, the threads at both ends of the adjusting rod turning in opposite directions, guide rods threadedly connected to both ends of the adjusting rod, guide rods slidably connected to the support beam, a vertical plate fixedly connected to the end of the guide rod away from the adjusting rod, a horizontal plate fixedly connected to the bottom of the vertical plate, a clamping plate hinged to the end of the horizontal plate, a vertically arranged screw threadedly connected to the horizontal plate, and a support plate provided at the top of the screw.

[0006] Preferably, a portal-shaped mounting bracket is fixedly connected to the middle of the support beam, and an adjusting rod passes through the mounting bracket and is rotatably connected to the mounting bracket.

[0007] Preferably, the drive mechanism includes a stepper motor mounted on the top surface of the mounting frame. The output end of the stepper motor is connected to a vertically arranged transmission rod. The bottom end of the transmission rod passes through the top surface of the mounting frame and is coaxially fixed with a first bevel gear. A second bevel gear that meshes with the first bevel gear is coaxially fixed on the adjusting rod.

[0008] Preferably, the two ends of the support beam are fixedly connected to guide cylinders with a rectangular cross-section, the guide rod passes through the guide cylinder and is slidably connected to the guide cylinder, and the lifting ring is fixedly connected to the guide cylinder.

[0009] Preferably, an elastic telescopic rod is hinged between the outer side of the clamping plate and the top surface of the cross plate.

[0010] Preferably, the inner side of the clamping plate is provided with anti-slip strips.

[0011] Preferably, a nut is coaxially fixed to the bottom end of the screw.

[0012] The beneficial effects of this utility model are as follows: (1) Through the hinge design of the clamping plate and the horizontal plate, the clamping plate can automatically adjust its clamping posture according to the inclination angle of the inclined web when it is close to the inclined web, so as to ensure that the clamping plate adapts to the inclined web and stably clamps the steel box girder. Then, the support plate is lifted by the screw so that the support plate can hold the flange plate, thus forming synchronous support for the inclined web and the flange plate, thereby reducing the deformation of the steel box girder; (2) The driving mechanism drives the guide rods on both sides to move symmetrically through the adjusting rod to ensure that the clamping distance is adjusted synchronously, thereby reducing the risk of uneven load on one side of the steel box girder; (3) The elastic telescopic rod applies tension to the clamping plate through the internal spring, so that the clamping plate tilts towards the inclined web, thereby facilitating the clamping plate to adapt to the inclined web. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0015] Figure 3 This is a schematic diagram of the structure of the steel box girder clamping device of this utility model;

[0016] Figure 4 This is a frontal structural diagram of the present invention when clamping a steel box girder.

[0017] Reference numerals: 1. Support beam, 2. Lifting ring, 3. Adjusting rod, 4. Drive mechanism, 41. Stepper motor, 42. Transmission rod, 43. First bevel gear, 44. Second bevel gear, 5. Guide rod, 6. Vertical plate, 7. Horizontal plate, 8. Clamping plate, 9. Screw, 10. Support plate, 11. Steel box girder, 12. Sloping web plate, 13. Flange plate, 14. Mounting bracket, 15. Guide cylinder, 16. Elastic telescopic rod, 17. Anti-slip strip, 18. Nut. Detailed Implementation

[0018] The present invention will now be further described with reference to the accompanying drawings.

[0019] like Figure 1-4As shown, this utility model provides a steel box girder 11 hoisting device for bridge construction, including a horizontally arranged support beam 1, with symmetrically arranged lifting rings 2 at both ends of the support beam 1, a horizontally arranged adjusting rod 3 rotatably connected to the top surface of the support beam 1, a driving mechanism 4 for driving the adjusting rod 3 to rotate installed on the support beam 1, the driving mechanism 4 being connected to the adjusting rod 3 in a transmission connection, external threads being opened at both ends of the adjusting rod 3, the threads at both ends of the adjusting rod 3 having opposite directions, guide rods 5 being threadedly connected to both ends of the adjusting rod 3, the guide rods 5 being slidably connected to the support beam 1, a vertical plate 6 being fixedly connected to the end of the guide rod 5 away from the adjusting rod 3, a horizontal plate 7 being fixedly connected to the bottom of the vertical plate 6, a clamping plate 8 being hinged to the end of the horizontal plate 7, a vertically arranged screw 9 being threadedly connected to the horizontal plate 7, a support plate 10 being provided at the top end of the screw 9, and the support plate 10 being rotatably connected to the screw 9.

[0020] Specifically, during the hoisting of the steel box girder 11, the drive mechanism 4 drives the adjusting rod 3 to rotate. The adjusting rod 3 drives the guide rods 5 on both sides to move towards each other. The guide rods 5 push the clamping plate 8 closer to the inclined web plate 12 through the vertical plate 6 and the horizontal plate 7. When the clamping plate 8 contacts the inclined web plate 12, since the clamping plate 8 is hinged to the horizontal plate 7, the clamping plate 8 can automatically adjust its clamping posture according to the inclination angle of the inclined web plate 12, thereby ensuring that the clamping plate 8 adaptively fits the inclined web plate 12 and stably clamps the steel box girder 11. Then, the support plate 10 is driven to rise by rotating the screw 9 until the support plate 10 abuts against the bottom surface of the flange plate 13. This forms synchronous support for the inclined web plate 12 and the flange plate 13, distributing the force and reducing the deformation of the steel box girder 11. In addition, the drive mechanism 4 drives the guide rods 5 on both sides to move symmetrically through the adjusting rod 3, ensuring that the clamping distance is adjusted synchronously, thereby reducing the risk of uneven load on one side of the steel box girder 11.

[0021] In some embodiments, a portal-shaped mounting bracket 14 is fixedly connected to the middle of the support beam 1. An adjusting rod 3 passes through the mounting bracket 14 and is rotatably connected to it. The adjusting rod 3 is rotatably connected to the support beam 1 via the mounting bracket 14. The drive mechanism 4 includes a stepper motor 41 mounted on the top surface of the mounting bracket 14. The output end of the stepper motor 41 is driven by a vertically arranged transmission rod 42. The bottom end of the transmission rod 42 passes through the top surface of the mounting bracket 14 and is coaxially fixed with a first bevel gear 43. A second bevel gear 44, which meshes with the first bevel gear 43, is coaxially fixed on the adjusting rod 3. Specifically, in use, the stepper motor 41 drives the first bevel gear 43 to rotate via the transmission rod 42, and the first bevel gear 43 drives the adjusting rod 3 to rotate via the second bevel gear 44.

[0022] In some embodiments, the two ends of the support beam 1 are fixedly connected to guide cylinders 15 with a rectangular cross-section, the guide rod 5 passes through the guide cylinder 15 and is slidably connected to the guide cylinder 15, the rectangular cross-section of the guide cylinder 15 is used to restrict the circumferential rotation of the guide rod 5, and the lifting ring 2 is fixedly connected to the guide cylinder 15.

[0023] In some embodiments, an elastic telescopic rod 16 is hinged between the outer side of the clamping plate 8 and the top surface of the cross plate 7. The elastic telescopic rod 16 is provided with a spring inside. The elastic telescopic rod 16 applies a pulling force to the clamping plate 8 through the internal spring, so that the clamping plate 8 tilts towards the inclined web plate 12, thereby facilitating the clamping plate 8 to adaptively fit the inclined web plate 12.

[0024] In some embodiments, the inner side of the clamping plate 8 is provided with an anti-slip strip 17. By providing the anti-slip strip 17, the coefficient of friction can be increased, reducing the slippage of the steel box girder 11 during hoisting.

[0025] In some embodiments, a nut 18 is coaxially fixed to the bottom end of the screw 9, and the screw 9 can be rotated by setting the nut 18.

[0026] The specific usage process of this utility model is as follows: Two lifting devices are required for use. First, suspend the two lifting devices on the crane hook cable via the lifting ring 2. Adjust the cable length to ensure the device is horizontal. Operate the crane to move the two lifting devices to both ends of the steel box girder 11, ensuring the clamping plate 8 is located on both sides of the inclined web plate 12. Next, start the stepper motor 41. The stepper motor 41 drives the adjusting rod 3 to rotate. The adjusting rod 3 drives the guide rods 5 on both sides to move towards each other. The guide rods 5 push the clamping plate 8 closer to the inclined web plate 12. When the clamping plate 8 contacts the inclined web plate 12... The spring of the elastic telescopic rod 16 deforms under stress, and the clamping plate 8 rotates around the hinge point. The clamping plate 8 automatically adjusts to be completely in contact with the inclined web plate 12. At this time, the anti-slip strip 17 contacts the surface of the beam to form a stable clamp. Then, the nut 18 at the bottom of the screw 9 is rotated to drive the support plate 10 to rise until the support plate 10 presses against the bottom surface of the flange plate 13. This can form synchronous support for the inclined web plate 12 and the flange plate 13. Finally, the crane lifts the two lifting devices simultaneously and lifts the steel box girder 11 to the designated position. Then, the clamping and support are released by reversing the operation to complete the installation of the steel box girder 11.

[0027] The above embodiments can be combined with each other.

[0028] The above embodiments are not intended to limit the shape, material, structure, etc. of this utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

Claims

1. A steel box girder hoisting device for bridge construction, comprising a horizontally arranged support beam, characterized in that: The support beam has symmetrically arranged lifting rings at both ends. A horizontally arranged adjusting rod is rotatably connected to the top surface of the support beam. A drive mechanism for driving the adjusting rod to rotate is installed on the support beam. The adjusting rod has external threads at both ends, with the threads at both ends rotating in opposite directions. Guide rods are threaded to both ends of the adjusting rod and are slidably connected to the support beam. A vertical plate is fixedly connected to the end of the guide rod away from the adjusting rod. A horizontal plate is fixedly connected to the bottom of the vertical plate. A clamping plate is hinged to the end of the horizontal plate. A vertically arranged screw is threaded to the horizontal plate, and a support plate is provided at the top of the screw.

2. The steel box girder hoisting device for bridge construction according to claim 1, characterized in that: A portal-shaped mounting frame is fixedly connected to the middle of the support beam, and an adjusting rod passes through the mounting frame and is rotatably connected to the mounting frame.

3. The steel box girder hoisting device for bridge construction according to claim 2, characterized in that: The drive mechanism includes a stepper motor mounted on the top surface of the mounting frame. The output end of the stepper motor is connected to a vertically arranged transmission rod. The bottom end of the transmission rod passes through the top surface of the mounting frame and is coaxially fixed with a first bevel gear. A second bevel gear that meshes with the first bevel gear is coaxially fixed on the adjusting rod.

4. The steel box girder hoisting device for bridge construction according to claim 1, characterized in that: The two ends of the support beam are fixedly connected to guide cylinders with a rectangular cross-section. The guide rod passes through the guide cylinder and is slidably connected to the guide cylinder. The lifting ring is fixedly connected to the guide cylinder.

5. A steel box girder hoisting device for bridge construction according to claim 1, characterized in that: An elastic telescopic rod is hinged between the outer side of the clamping plate and the top surface of the horizontal plate.

6. The steel box girder hoisting device for bridge construction according to claim 1, characterized in that: The clamping plate has anti-slip strips on its inner side.

7. A steel box girder hoisting device for bridge construction according to claim 1, characterized in that: A nut is coaxially fixed to the bottom end of the screw.

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