Overpass viaduct steel box girder pushing mechanism

Abstract

The utility model belongs to the field of constructional engineering equipment, and relates to an overpass viaduct steel box beam pushing mechanism which comprises two main beam frames, a pushing hydraulic cylinder used for pushing is arranged on any main beam frame, a displacement hydraulic cylinder is connected between the two main beam frames, and each main beam frame comprises a cross beam stretching across a bridge floor. The two ends of the cross beam are slidably connected with mounting frames respectively, positioning bolts used for positioning are arranged on the mounting frames, a plurality of mounting holes are correspondingly formed in the cross beam, a positioning mechanism is connected to the lower portions of the mounting frames, and the positioning mechanism comprises a positioning plate used for being pressed on the side face of a bridge and a positioning hydraulic cylinder used for driving the positioning plate to move. The mounting frame can slide along the cross beam, so that the distance between the positioning plate and the bridge can be adjusted, and the device can adapt to different bridges. The two main beam frames of the device can move alternately, so that the whole device is moved, and the device can be conveniently moved to different bridge sections for operation.

Description

Technical Field

[0001] This utility model belongs to the field of construction engineering equipment and relates to a jacking mechanism for steel box girders of elevated bridges. Background Technology

[0002] Application CN202220997084.0 discloses a hydraulic jacking device for steel box girders. The technical solution of this application includes a guiding mechanism to guide the slider, making it suitable for jacking steel box girders on the curved passageways of highways and viaducts. However, this device requires repositioning after each jacking operation to push different box girders / sliders to predetermined positions, and its inconvenience due to its limited mobility makes it impractical to use. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a jacking mechanism for steel box girders of elevated bridges.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a jacking mechanism for a steel box girder of an overpass, comprising two main beam frames, each of which is equipped with a pushing hydraulic cylinder for pushing, and a displacement hydraulic cylinder connected between the two main beam frames. The main beam frame includes a crossbeam spanning the bridge deck, and mounting frames are slidably connected to both ends of the crossbeam. The mounting frames are equipped with positioning bolts for positioning, and the crossbeam is provided with a number of mounting holes. A positioning mechanism is connected below the mounting frames, and the positioning mechanism includes a positioning plate for pressing against the side of the bridge and a positioning hydraulic cylinder for driving the positioning plate to move.

[0005] Preferably, the main girder includes rollers for support on the bridge.

[0006] Preferably, the positioning mechanism further includes a rotating shaft bolt, and the positioning hydraulic cylinder and the positioning plate are rotatably connected by the rotating shaft bolt.

[0007] Preferably, the surface of the positioning plate is provided with anti-slip texture.

[0008] Preferably, the crossbeam has an I-shaped cross-section, the side of the crossbeam has a groove, and the mounting bracket includes a protrusion for inserting into the groove on the side of the crossbeam.

[0009] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0010] The mounting frame in this invention can slide along the crossbeam, thereby adjusting the distance between the positioning plate and the bridge, allowing the device to adapt to different bridge types. The two main beams of this device can move alternately, enabling the entire device to be moved and easily deployed to different bridge sections for operation. The positioning plate of this device can rotate to accommodate different bridge side inclinations. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of a steel box girder jacking mechanism for an overpass viaduct.

[0013] Figure 2 This is a structural schematic diagram of the main beam frame.

[0014] In the above figures, 1. Main beam frame; 2. Pushing hydraulic cylinder; 3. Displacement hydraulic cylinder; 11. Crossbeam; 111. Groove; 12. Mounting bracket; 13. Positioning bolt; 14. Positioning hydraulic cylinder; 15. Positioning plate; 16. Roller; 17. Rotary shaft bolt. Detailed Implementation

[0015] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0016] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0017] like Figure 1 , Figure 2 As shown, in order to facilitate its own movement, a steel box girder jacking mechanism for an overpass includes two main beam frames 1. Each main beam frame 1 is equipped with a pushing hydraulic cylinder 2 for pushing the box girder or other components. A displacement hydraulic cylinder 3 is connected between the two main beam frames 1. The main beam frame 1 includes a crossbeam 11 spanning the bridge deck. Mounting frames 12 are slidably connected to both ends of the crossbeam 11. The mounting frames 12 are equipped with positioning bolts 13 for positioning. A number of mounting holes are correspondingly provided on the crossbeam 11. A positioning mechanism is connected below the mounting frame 12. The positioning mechanism includes a positioning plate 15 for pressing against the side of the bridge and a positioning hydraulic cylinder 14 for driving the positioning plate 15 to move.

[0018] Specifically, since the cross-section of bridges is generally box-shaped (box girder), T-shaped (T-beam), or I-shaped (I-beam), the most direct difference between these shapes lies in the different widths of the lower part of the bridge. Therefore, this utility model is equipped with a mounting frame 12 that can slide along the crossbeam 11. When this utility model is used on different bridges, the mounting frame 12 can be moved to maintain a suitable distance between the positioning plate 15 and the bridge, and the mounting frame 12 is connected to the crossbeam 11 by the positioning bolts 13. When the positioning plates 15 at both ends of the crossbeam 11 press against the bridge, there is friction between the main beam frame 1 and the bridge, which positions the main beam frame 1. When one main beam frame 1 has friction with the bridge and the other main beam frame 1 does not have friction with the bridge, the displacement hydraulic cylinder 3 can be activated to move the main beam frame 1 that does not have friction with the bridge. By controlling the two main beam frames 1 to move alternately, the entire device can be moved in a straight line.

[0019] Furthermore, the main girder 1 includes rollers 16 that serve as supports on the bridge, thereby reducing friction between the main girder 1 and the upper surface of the bridge.

[0020] Furthermore, the positioning mechanism also includes a rotating shaft bolt 17. The positioning hydraulic cylinder 14 and the positioning plate 15 are rotatably connected by the rotating shaft bolt 17. For different bridges, the positioning plate 15 can be rotated for adjustment, and the rotating shaft bolt 17 can be tightened to position it so that the positioning plate 15 can easily fit against the side of the bridge.

[0021] Furthermore, the surface of the positioning plate 15 is provided with anti-slip texture to increase the friction between the positioning plate 15 and the side of the bridge.

[0022] Furthermore, the crossbeam 11 has an I-shaped cross section, and the side of the crossbeam 11 is provided with a groove 111. The mounting bracket 12 includes a protrusion for inserting into the groove 111 on the side of the crossbeam 11, so that the mounting bracket 12 can move along the crossbeam 11.

[0023] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A jacking mechanism for a steel box girder of an overpass, characterized in that, It includes two main beams, each equipped with a pushing hydraulic cylinder for pushing, and a displacement hydraulic cylinder connecting the two main beams. Each main beam includes a crossbeam spanning the bridge deck, with mounting frames slidably connected to both ends of the crossbeam. The mounting frames are equipped with positioning bolts for positioning, and the crossbeams have corresponding mounting holes. A positioning mechanism is connected below the mounting frames, and the positioning mechanism includes a positioning plate for pressing against the side of the bridge and a positioning hydraulic cylinder for driving the positioning plate to move.

2. The jacking mechanism for a steel box girder of an overpass bridge according to claim 1, characterized in that, The main girder frame includes rollers used for support on the bridge.

3. The jacking mechanism for a steel box girder of an overpass bridge according to claim 2, characterized in that, The positioning mechanism also includes a rotating shaft bolt, and the positioning hydraulic cylinder and the positioning plate are rotatably connected by the rotating shaft bolt.

4. The jacking mechanism for a steel box girder of an overpass bridge according to claim 3, characterized in that, The surface of the positioning plate is provided with anti-slip texture.

5. The jacking mechanism for a steel box girder of an overpass bridge according to claim 4, characterized in that, The crossbeam has an I-shaped cross section, and the side of the crossbeam has a groove. The mounting bracket includes a protrusion for inserting into the groove on the side of the crossbeam.

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