Bridge expansion device

Abstract

A bridge expansion device comprises a joint crossing plate and a fixing plate which are matched with each other, the joint crossing plate is installed in a first installation notch of a first beam body, and the fixing plate is installed in a second installation notch of a second beam body. The pressure bracket components are distributed at intervals in the width direction of the seam crossing plate, a rotating shaft mounting hole is formed in each pressure bracket component, a rotating shaft is arranged in each rotating shaft mounting hole in a penetrating manner, and the root part of the seam crossing plate is arranged above the rotating shaft and is fixedly connected with the rotating shaft. Compared with the prior art, the bridge expansion device has the advantages that the integrally-formed pressure bracket assembly is arranged in the first mounting notch of the bridge, the rotating shaft is arranged in the rotating shaft mounting hole of the pressure bracket assembly in a penetrating mode, and the root of the joint crossing plate is fixedly connected with the rotating shaft, so that bolt-free mounting is achieved, bolt holes do not exist in the plate face, noise generated by vehicle passing is reduced, and the service life of the bridge expansion device is prolonged. The problem of loosening of bolts and nuts is solved, and reliability of the telescopic device is improved.

Description

Technical Field

[0001] The utility model relates to a bridge expansion device. Background Art

[0002] During operation, bridges are subject to creep and wind forces, resulting from factors such as vehicle loads, the bridge's own materials, and temperature, causing deformation such as contraction and elongation. Expansion joints are a key functional component of bridge construction, ensuring they meet the requirements for bridge deformation. These joints are typically installed between bridges and between bridges and abutments. To ensure safe and stable vehicle travel, these joints must accommodate the various changes in the beam structure. While conventional comb-plate expansion joints can meet the basic requirements for beam expansion and displacement, their on-site adjustment and installation are complex and difficult. Furthermore, as disclosed in Chinese Utility Model Patent No. 201821897603.6 (authorized by public number CN 209353219 U), "A Bridge Expansion Joint Structure," the span plate is welded to a rotating shaft, which is then mounted on a bracket. The pressure plate presses against the rotating shaft and is bolted securely. However, this structure has the disadvantage that the pressure plate and bracket are separate components and bolted together, which can lead to bolt loosening. Furthermore, the bolt holes on the plate surface increase vehicle noise. In summary, further improvements need to be made to the existing bridge expansion devices. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide a bridge expansion device with a simple structure and bolt-free installation in response to the above-mentioned existing technical status.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a bridge expansion device, including a span plate and a fixed plate that cooperate with each other, the span plate is installed in the first installation slot of the first beam body, and the fixed plate is installed in the second installation slot of the second beam body, and is characterized in that: an integrally formed pressure support seat assembly is provided in the first installation slot, the pressure support seat assemblies are spaced apart along the width direction of the span plate, and a rotating shaft mounting hole is opened on each pressure support seat assembly, a rotating shaft is passed through the rotating shaft mounting hole, and the root of the span plate is provided above the rotating shaft and is connected and fixed to the rotating shaft.

[0005] In order to ensure that the pressure support seat assembly and the cross-slit plate are mutually limited, a limiting groove is opened at the root of the cross-slit plate, and the pressure support seat assembly is embedded in the limiting groove, and the upper surface of the pressure support seat assembly is flush with the upper surface of the cross-slit plate.

[0006] There can be various connection structures between the rotating shaft and the pressure support seat assembly and the cross-seam plate. Preferably, the rotating shaft mounting hole is a circular hole, and the rotating shaft has a cylindrical section and a cutting section distributed at intervals. The cylindrical section is passed through the rotating shaft mounting hole, and the cutting section is welded and fixed to the bottom of the cross-seam plate.

[0007] To adjust the installation height of the span plate, a height adjustment assembly is installed within the first installation notch, to which the pressure support assembly is secured. During installation, the height of the height adjustment assembly is adjusted based on the notch depth to align the flatness of the telescopic device with the bridge pavement, reducing intermediate steps and enabling faster installation of the telescopic device.

[0008] In order to enable each pressure support seat assembly to have an independent corresponding height adjustment assembly, the height adjustment assembly is a height adjustment plate, which is arranged at intervals along the width direction of the bridge and corresponds one-to-one to the pressure support seat assembly.

[0009] In order to make the installation position of the height adjustment component more reasonable, the height adjustment component is arranged on the outside of the pressure support seat component, and an anti-collision baffle is installed on the outside of the height adjustment component. The anti-collision baffle plays a protective role for the telescopic device.

[0010] The height adjustment component can have a variety of installation structures. Preferably, an embedded steel plate is fixed in the first installation slot, the height adjustment component is welded and fixed to the embedded steel plate, and the pressure support seat component is welded and fixed to the height adjustment component.

[0011] To facilitate the horizontal rotation and vertical angular swivel of the telescopic device, a bolt mounting base is welded to the embedded steel plate. Located in front of the pressure support assembly along the longitudinal direction of the bridge, the span plate is connected to the bolt mounting base via bolts. The base of the bolt extends into the bolt mounting base, and an elastic member is provided between the base of the bolt and the embedded steel plate. The head of the bolt extends upward from the bolt mounting base and is fixed to the span plate. This structure allows the span plate to be fastened, preventing it from falling off.

[0012] Further preferably, a bolt mounting hole is opened on the cross-seam plate, the head of the bolt is arranged in the bolt mounting hole and is connected and fixed with a nut, and a filling piece is provided in the bolt mounting hole, the filling piece covers the bolt head and the nut and is flush with the upper surface of the cross-seam plate.

[0013] The fixing plate can have a variety of mounting structures. Preferably, a pre-buried steel plate is provided at the bottom of the second mounting notch, and the fixing plate is fixed to the pre-buried steel plate via a support frame. Alternatively, shear pins can be installed at the bottom of the second mounting notch, and the fixing plate can be fastened to the shear pins via an anchor assembly.

[0014] Compared with the existing technology, the advantages of the present invention are: the bridge expansion device is provided with an integrally formed pressure support seat assembly in the first mounting groove of the bridge, the rotating shaft is passed through the rotating shaft mounting hole of the pressure support seat assembly, and the root of the cross-seam plate is connected and fixed to the rotating shaft, thereby realizing bolt-free installation, and there are no bolt holes on the plate surface, which reduces the noise generated by vehicle passage, eliminates the problem of loose bolts and nuts, and improves the reliability of the expansion device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the telescopic device according to an embodiment of the present utility model;

[0016] Figure 2 for Figure 1 A cross-sectional view of the structure of the telescopic device shown;

[0017] Figure 3 This is a structural diagram of a pressure support assembly according to an embodiment of the present invention;

[0018] Figure 4 This is a schematic structural diagram of a cross-seam plate according to an embodiment of the present utility model;

[0019] Figure 5 This is a schematic structural diagram of the rotating shaft of an embodiment of the present utility model. DETAILED DESCRIPTION

[0020] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0021] like Figures 1 to 5 As shown, the bridge expansion device of this embodiment includes a cross-slot plate 1 and a fixed plate 2 that cooperate with each other. The cross-slot plate 1 and the fixed plate 2 are arranged in the form of intersecting comb plates with intervals between them. The cross-slot plate 1 is installed in the first mounting notch 103 of the first beam body 101, and the fixed plate 2 is installed in the second mounting notch 104 of the second beam body 102.

[0022] The first mounting notch 103 contains the support assembly 3, the rotating shaft 4, the height adjustment assembly 5, the embedded steel plate 6, and the anti-collision baffle 7. The embedded steel plate 6 is fixed to the bottom of the first mounting notch 103. The height adjustment assembly 5 uses a height adjustment plate and is welded to the embedded steel plate 6. The height adjustment assemblies 5 are arranged at intervals along the width of the bridge and are located outside the support assembly 3. The support assemblies 3 are spaced apart along the width of the span plate 1 and correspond one-to-one with the height adjustment assemblies 5. The support assembly 5 is welded to the inside of the corresponding height adjustment assembly 5. The anti-collision baffle 7 is located outside the height adjustment assembly 5 and is welded to the height adjustment assembly 5.

[0023] The pressure support assembly 3 of this embodiment adopts an integrally formed structure. A shaft mounting hole 31 is provided on each pressure support assembly 3. The shaft 4 passes through the shaft mounting hole 31. The root of the cross-slit plate 1 is located above the shaft 4 and is connected and fixed to the shaft 4. Specifically, the shaft mounting hole 31 is a circular hole. The shaft 4 has a cylindrical section 41 and a cutting section 42 that are spaced apart. The cylindrical section 41 passes through the shaft mounting hole 31. The cutting section 42 is welded and fixed to the bottom of the cross-slit plate 1, completing the installation of the cross-slit plate 1, the shaft 4, and the pressure support assembly 3. The telescopic device realizes the vertical angle rotation function through the shaft 4. At the same time, the split form of the pressure seat and the drag seat is changed, and the connecting bolts are eliminated, thereby eliminating the situation where the connecting bolts become loose, thereby improving the reliability of the telescopic device.

[0024] In addition, a limiting groove 11 is opened at the root of the span plate 1, and the pressure support seat assembly 3 is embedded in the limiting groove 11, and the upper surface of the pressure support seat assembly 3 is flush with the upper surface of the span plate 1, so that the flatness of the span plate assembly and the bridge surface meets the standard requirements. Finally, welding and fastening are performed, and the pressure support seat assembly 3 is fastened from the root of the span plate 1.

[0025] In this embodiment, a bolt mounting seat 81 is welded to the embedded steel plate 6. Bolt mounting seat 81 is located in front of the support assembly 3 along the longitudinal bridge direction. The span plate 1 is connected to the bolt mounting seat 81 via bolts 82. The bottom of the bolt 82 extends into the bolt mounting seat 81, and an elastic member 83 is positioned between the bottom of the bolt and the embedded steel plate 6. A bolt mounting hole 12 is formed in the span plate 1. The head of the bolt 82 extends upward from the bolt mounting seat 81 and is positioned within the bolt mounting hole 12. It is then secured to the span plate 1 via a nut 84. A cast filler 85 is positioned within the bolt mounting hole 12. The filler 85 is made of elastic material and covers the head of the bolt 82 and the nut 84, remaining flush with the upper surface of the span plate 1. The bolt mounting seat 81, bolt 82, elastic member 83, and nut 84 constitute an elastic fastening assembly that secures the span plate 1 from the inside. This elastic fastening assembly provides certain horizontal and vertical rotation capabilities. The elastic body 83 can be but not limited to elastic materials such as high elasticity polyurethane, rubber, spring. In addition, in order to improve the friction resistance of vehicle traffic, in the present embodiment, anti-skid grooves 13 can be carved on the surface of the cross-slit plate 1.

[0026] An embedded steel plate 6 is provided at the bottom of the second mounting notch 104, and the fixing plate 2 is secured to the embedded steel plate 6 via a support frame 9. The fixing plate 2 can also be secured using a connection structure such as an anchor assembly and shear pins. The specific installation method of the fixing plate 2 can be referenced to existing technologies and will not be described in detail here.

[0027] The bridge expansion device of this embodiment is a concrete-free structure. The impact plate 7 can be made of steel plate and its height can be adjusted according to the actual installation dimensions. The bridge deck pavement 10 is laid on the outside of the impact plate 7. The upper surfaces of the span plate 1, fixed plate 2, and impact plate 7 are flush with the upper surface of the bridge deck pavement 10. The bridge deck pavement 10 can be made of a variety of paving materials, such as asphalt, concrete, and epoxy resin. Furthermore, the expansion device of this embodiment also meets the requirements of a concrete structure.

[0028] When the bridge produces horizontal lateral displacement, the elastic deformation of the front elastic fastening assembly and the gap between the comb teeth are used to achieve lateral rotation; when the bridge produces vertical movement, the vertical rotation function of the telescopic device is achieved through the rotation between the pressure support assembly 3 and the rotating shaft 4.

[0029] In summary, the bridge expansion device of this embodiment not only allows for lateral displacement but also achieves horizontal and vertical rotation. Boltless installation is achieved, with no bolt holes on the plate surface. This reduces noise generated by traffic, eliminates loose bolts and nuts, and prevents them from falling out. During installation, the expansion device is aligned with the bridge pavement by adjusting the height of the assembly 5 according to the depth of the notch. The expansion device is then welded directly to the embedded steel plate 6, eliminating intermediate steps. This allows for rapid installation of the expansion device.

Claims

1. A bridge expansion device, comprising a spanning plate (1) and a fixing plate (2) that cooperate with each other, wherein the spanning plate (1) is installed in a first mounting notch (103) of a first beam (101), and the fixing plate (2) is installed in a second mounting notch (104) of a second beam (102), characterized in that: An integrally formed pressure support assembly (3) is provided in the first mounting slot (103), and the pressure support assembly (3) is spaced apart along the width direction of the cross-slit plate (1). A rotating shaft mounting hole (31) is provided on each pressure support assembly (3), and a rotating shaft (4) is passed through the rotating shaft mounting hole (31). The root of the cross-slit plate (1) is provided above the rotating shaft (4) and is connected and fixed to the rotating shaft (4).

2. The bridge expansion device according to claim 1, characterized in that: A limiting groove (11) is formed at the root of the cross-seam plate (1), the pressure support seat assembly (3) is embedded in the limiting groove (11), and the upper surface of the pressure support seat assembly (3) is flush with the upper surface of the cross-seam plate (1).

3. The bridge expansion device according to claim 1, characterized in that: The rotating shaft mounting hole (31) is a circular hole. The rotating shaft (4) has a cylindrical section (41) and a cutting section (42) that are spaced apart. The cylindrical section (41) is inserted into the rotating shaft mounting hole (31). The cutting section (42) is welded and fixed to the bottom of the cross-seam plate (1).

4. The bridge expansion device according to claim 1, characterized in that: A height adjustment component (5) is provided in the first installation notch (103), and the pressure support seat component (3) is fixed on the height adjustment component (5).

5. The bridge expansion device according to claim 4, characterized in that: The height adjustment assembly (5) is a height adjustment plate, which is arranged at intervals along the width direction of the bridge and corresponds one-to-one with the pressure support assembly (3).

6. The bridge expansion device according to claim 5, characterized in that: The height adjustment component (5) is arranged on the outside of the pressure support seat component (3), and an anti-collision baffle (7) is installed on the outside of the height adjustment component (5).

7. The bridge expansion device according to claim 5, characterized in that: An embedded steel plate (6) is fixed in the first installation notch (103), the height adjustment component (5) is welded and fixed to the embedded steel plate (6), and the pressure support seat component (3) is welded and fixed to the height adjustment component (5).

8. The bridge expansion device according to claim 7, characterized in that: A bolt mounting seat (81) is welded and fixed on the embedded steel plate (6). Along the longitudinal bridge direction, the bolt mounting seat (81) is located on the front side of the pressure support seat assembly (3). The cross-seam plate (1) is connected to the bolt mounting seat (81) through a bolt (82). The bottom of the bolt (82) extends into the bolt mounting seat (81), and an elastic body (83) is provided between the bottom of the bolt and the embedded steel plate (6). The head of the bolt (82) extends upward from the bolt mounting seat (81) and is fixed to the cross-seam plate (1).

9. The bridge expansion device according to claim 8, characterized in that: The cross-slit plate (1) is provided with a bolt mounting hole (12), the head of the bolt (82) is arranged in the bolt mounting hole (12) and is connected and fixed by a nut (84), and a filling piece (85) is provided in the bolt mounting hole (12), the filling piece (85) covers the head of the bolt (82) and the nut (84) and is flush with the upper surface of the cross-slit plate (1).

10. The bridge expansion device according to any one of claims 1 to 9, characterized in that: An embedded steel plate (6) is provided at the bottom of the second installation notch (104), and the fixing plate (2) is fixed to the embedded steel plate (6) via a support frame (9).

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