Longitudinal adjusting device for steel box girder

Abstract

The utility model discloses a longitudinal adjusting device for a steel box girder, which relates to the field of bridge construction equipment, and adopts the technical scheme that the longitudinal adjusting device comprises a track fixedly arranged on a bridge cantilever, a plurality of rhombic frames are arranged on the track side by side, every two adjacent rhombic frames are fixedly connected through a middle door beam, and a group of four-way sliding plates are respectively arranged at the cantilever end of each rhombic frame; an upper cross beam is arranged on the four-way sliding plates, the two ends of the upper cross beam are each provided with a lifting jack, each lifting jack is connected with a steel strand, and the lower end of each steel strand is connected with a steel box beam. The utility model has the beneficial effects that the structure is simple, the installation and the construction are convenient, and the longitudinal position of the steel box girder section is easy to control in the splicing of the steel box girder section; and the direction is finely adjusted in combination with the four-way sliding plate, so that the longitudinal position of the steel box girder can be accurately controlled in section assembly, and the reliability of equipment is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of bridge construction equipment, in particular to a longitudinal adjustment device for a steel box beam. Background Art

[0002] Compared with concrete beams, steel box beams are widely used in large-span bridges due to their light weight and good mechanical properties. The commonly used steel box beam lifting methods at home and abroad are: under floating conditions, large lifting equipment such as crane ships are used to lift and install the steel box beams in place; or bridge cranes are used to lift the steel box beam segments on the beam transport ship to the installation location to complete the installation.

[0003] The existing technology uses a bridge crane to assemble steel box girder segments. After the steel box girder segments are lifted to the designed elevation, their longitudinal positions need to be accurately adjusted to achieve docking between the segments to be installed and the installed segments to complete the installation of the steel box girder segments. Utility Model Content

[0004] In view of the above technical problems, the utility model provides a longitudinal adjustment device for a steel box girder.

[0005] The technical solution is as follows: it includes a track fixedly set on the cantilever of the bridge, a plurality of diamond frames are arranged side by side on the track, two adjacent diamond frames are fixedly connected by a middle door beam, a group of four-way slides are respectively arranged at the cantilevered end of each diamond frame, an upper cross beam is arranged on the plurality of four-way slides, a lifting top is respectively arranged at the two ends of the upper cross beam, each of the lifting tops is respectively connected to a steel strand, and the lower end of the steel strand is connected to a steel box beam.

[0006] Preferably, the four-way slide plate comprises a bottom plate arranged on the diamond frame, a top plate is slidably arranged on the bottom plate, and an upper crossbeam is arranged on the top plate;

[0007] A slide groove is provided on the side wall of the top plate, wherein a slider is slidably connected in each of the two slide grooves, the two sliders are adjacent to each other, and a group of slider push rods are detachably provided on each slider, and the movable part of the slider push rod is detachably connected to the slider;

[0008] A mounting seat is detachably arranged on the fixed portion of each of the skateboard push rods, and the mounting seat is fixedly connected to the diamond frame.

[0009] Preferably, the mounting seat comprises a rectangular support, a convex block is fixedly provided at each end of the support, a semicircular arc slot is provided in the middle of the upper surface of the convex block, and threaded holes are provided on the convex blocks at both sides of the slot;

[0010] An arc-shaped clamping plate is detachably provided on each of the protrusions, and a folding edge is respectively provided on the two ends of the clamping plate. A through hole is provided on the folding edge, and the through hole corresponds to the threaded hole. The clamping plate is threadedly connected to the protrusion via a bolt passing through the through hole.

[0011] Preferably, a plurality of fixing holes are arranged in an array on the plate body of the support, and the support is fixedly connected to the diamond frame by bolts penetrating the fixing holes.

[0012] The beneficial effects brought about by the technical solution provided by the embodiment of the utility model are: simple structure, easy installation and construction, and easy control of the longitudinal position of the steel box girder segment during assembly; combined with the four-way slide plate fine-tuning direction, precise control of the longitudinal position of the steel box girder segment during assembly can be achieved, greatly improving the reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The overall structure of the embodiment of the utility model is shown in FIG. Figure 1 .

[0014] Figure 2 The overall structure of the embodiment of the utility model is shown in FIG. Figure 2 .

[0015] Figure 3 It is a schematic diagram of the structure of a four-way slide plate according to an embodiment of the utility model.

[0016] Figure 4 This is a schematic diagram of the mounting base structure of an embodiment of the utility model.

[0017] Among them, the figure markings are: 1. Bridge cantilever; 2. Track; 3. Diamond frame; 4. Hydraulic cylinder; 5. Lifting top; 6. Four-way slide; 7. Steel strand; 8. Upper crossbeam; 9. Middle door beam; 10. Steel box beam; 11. Mounting seat; 12. Bottom plate; 13. Top plate; 14. Slide groove; 15. Slider; 17. Support; 18. Bump; 19. Clamp, 20. Slide plate push rod. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. Of course, the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0019] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0020] In the description of the invention of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention of the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention of the utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention of the present utility model, unless otherwise specified, "multiple" means two or more.

[0021] In the description of the invention of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention of the utility model can be understood according to specific circumstances.

[0022] Example 1

[0023] See also Figures 1 to 4 The utility model provides a steel box girder longitudinal adjustment device, comprising a track 2 fixedly arranged on a bridge cantilever 1, a plurality of rhombus frames 3 are arranged side by side on the track 2, two adjacent rhombus frames 3 are fixedly connected by a middle door beam 9, a group of four-way slide plates 6 are respectively arranged at the cantilever end of each rhombus frame 3, an upper cross beam 8 is arranged on the plurality of four-way slide plates 6, a hydraulic cylinder 4 is further arranged between the upper cross beam 8 and the rhombus frame 3, and the hydraulic cylinder 4 is used to control the sliding of the upper cross beam 8 along the cantilever of the rhombus frame 3, so as to adjust the longitudinal position of the steel box girder 10, so that the steel box girder 10 can be docked with the existing bridge cantilever 1;

[0024] A lifting top 5 is respectively arranged at the two ends of the upper cross beam 8, and each lifting top 5 is respectively connected to a steel strand 7, and the lower end of the steel strand 7 is connected to the steel box beam 10. The lifting top 5 is a hydraulic jack, which pulls up the steel strand 7 through hydraulic power, thereby lifting the steel box beam 10 upward.

[0025] The four-way slide plate 6 comprises a bottom plate 12 arranged on the diamond frame 3, a top plate 13 is slidably arranged on the bottom plate 12, and an upper crossbeam 8 is arranged on the top plate 13;

[0026] A slide groove 14 is provided on the side wall of the top plate 13, wherein two slide grooves 14 are respectively slidably connected with a slider 15, the two sliders 15 are adjacent, and a set of slider push rods 20 are detachably provided on each slider 15, and the movable part of the slider push rod 20 is detachably connected with the slider 15;

[0027] The slide push rod 20 preferably adopts a hydraulic push rod. Since the four-way slide 6 is used to fine-tune the position of the upper cross beam 8, the slide push rod 20 can adopt a hydraulic push rod with a small stroke to reduce the overall volume and cost of the device.

[0028] A mounting seat 11 is detachably provided on the fixed portion of each slide plate push rod 20 , and the mounting seat 11 is fixedly connected to the diamond frame 3 .

[0029] Through the cooperation of the two slide plate push rods 20, the four-way slide plate 6 can be slightly moved in the horizontal direction, so as to achieve fine adjustment of the longitudinal position of the steel box girder 10 during the lifting process.

[0030] The mounting base 11 includes a rectangular support 17, and a protrusion 18 is fixedly provided at each end of the support 17. A semicircular slot is provided in the middle of the upper surface of the protrusion 18, and threaded holes are provided on the protrusion 18 on both sides of the slot.

[0031] An arc-shaped clamping plate 19 is detachably provided on each protrusion 18, and a folding edge is respectively provided at both ends of the clamping plate 19, and a through hole is provided on the folding edge, and the through hole corresponds to the threaded hole. The clamping plate 19 is threadedly connected to the protrusion 18 by a bolt passing through the through hole.

[0032] A plurality of fixing holes are arranged in an array on the plate body of the support 17 , and the support 17 is fixedly connected to the diamond frame 3 by bolts penetrating the fixing holes.

[0033] When the utility model is used, the lifting top 5 pulls up the steel strand 7 through hydraulic power to lift the steel box girder 10 upward to the designed elevation, and controls the longitudinal sliding of the upper cross beam 8 through the hydraulic cylinder 4, thereby adjusting the longitudinal position of the steel box girder 10, and then controls the four-way slide plates 6 respectively, so that the steel box girder is accurately positioned.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A longitudinal adjustment device for a steel box girder, characterized in that: The invention comprises a track (2) fixedly arranged on a bridge cantilever (1), a plurality of rhombus frames (3) arranged side by side on the track (2), two adjacent rhombus frames (3) being fixedly connected via a middle door beam (9), a group of four-way slide plates (6) being arranged at the cantilevered end of each rhombus frame (3), an upper cross beam (8) being arranged on the plurality of four-way slide plates (6), a lifting top (5) being arranged at the two ends of the upper cross beam (8), each lifting top (5) being connected to a steel strand (7), and the lower end of the steel strand (7) being connected to a steel box beam (10).

2. The longitudinal adjustment device for a steel box beam according to claim 1, characterized in that: The four-way slide plate (6) comprises a bottom plate (12) arranged on the diamond frame (3), a top plate (13) slidably arranged on the bottom plate (12), and an upper crossbeam (8) arranged on the top plate (13); A slide groove (14) is provided on the side wall of the top plate (13), wherein two slide grooves (14) are respectively slidably connected to a slider (15), the two sliders (15) are adjacent to each other, and a group of slider push rods (20) are detachably provided on each slider (15), and the movable part of the slider push rod (20) is detachably connected to the slider (15); A mounting seat (11) is detachably provided on the fixed portion of each of the slide plate push rods (20), and the mounting seat (11) is fixedly connected to the diamond-shaped frame (3).

3. The longitudinal adjustment device for a steel box beam according to claim 2, characterized in that: The mounting seat (11) comprises a rectangular support (17), a protrusion (18) being fixedly provided at each end of the support (17), a semicircular arc-shaped slot being provided in the middle of the upper surface of the protrusion (18), and threaded holes being provided on the protrusion (18) at both sides of the slot; An arc-shaped clamping plate (19) is detachably provided on each of the protrusions (18), and a folding edge is provided at each end of the clamping plate (19). A through hole is provided on the folding edge, and the through hole corresponds to the threaded hole. The clamping plate (19) is threadably connected to the protrusion (18) via a bolt that penetrates the through hole.

4. The longitudinal adjustment device for a steel box beam according to claim 3, characterized in that: A plurality of fixing holes are arranged in an array on the plate body of the support (17), and the support (17) is fixedly connected to the diamond frame (3) via bolts penetrating the fixing holes.

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