Bridge expansion device

Abstract

The utility model relates to a bridge expansion device which comprises a first beam body, a second beam body, a joint crossing plate and a fixing plate, a multidirectional displacement hinge is arranged on the outer side portion of the joint crossing plate, and a mounting base used for mounting the multidirectional displacement hinge is arranged in a mounting notch of the first beam body; the mounting base comprises a lower bracket and an upper pressing base which are designed in a split mode, the lower bracket is provided with a containing groove used for containing the lower portion of the multidirectional displacement hinge, the upper pressing base comprises a pressing block arranged on the top of the lower bracket, the pressing block can abut against the surface of the upper portion of the multidirectional displacement hinge, and in the state, the pressing block is connected with the lower bracket through a first connecting piece; a pressing block is arranged on one side of the multidirectional displacement hinge and can move towards or away from the multidirectional displacement hinge. Or the pressing blocks are arranged on the two opposite sides of the multidirectional displacement hinge, the pressing block located on at least one side of the multidirectional displacement hinge can move towards or away from the multidirectional displacement hinge, and the structure is novel.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, in particular to a bridge expansion device. Background Art

[0002] During operation, bridges are subject to creep, wind forces, and other factors, such as vehicle loads, the bridge's own materials, and temperature, which can cause deformation, such as contraction and elongation. Expansion joints are a key functional component of bridge construction. To meet these deformation requirements, they are typically installed between bridges and between bridges and abutments.

[0003] For example, the Chinese utility model patent with patent number CN202123316200.2 (publication number CN216919995U) discloses a bridge expansion device, which includes a span plate and a fixed plate. The outer side of the span plate is installed at the end of the first beam, and the outer side of the fixed plate is installed at the end of the second beam. It is characterized in that: the span plate is a hard plate, and the fixed plate is a flexible plate that is easily deformed after being subjected to force. The inner side of the span plate and the inner side of the fixed plate are connected and fixed to each other. In order to make the expansion device have a multi-directional displacement function, a multi-directional displacement hinge is installed at the bottom of the outer end of the span plate.

[0004] From its Figure 1 It can be seen that a mounting seat is provided at the end of the first beam, and the mounting seat has a groove with an open top. The lower part of the multi-directional movable hinge is placed in the groove of the mounting seat. The cross-seam plate and the mounting seat cooperate to limit the multi-directional movable hinge in the vertical direction. The cross-seam plate and the mounting seat are connected together by bolts and nuts. However, when a vehicle passes by, the bolts and nuts will be impacted by the vehicle load, and it is easy for the bolts to slip, causing the nuts to loosen and the cross-seam plate to loosen, thereby causing traffic accidents. Utility Model Content

[0005] The second technical problem to be solved by the present invention is to provide a bridge telescopic device with a novel mounting seat structure and a multi-directional displacement hinge and a mounting seat that can be reliably constrained together in response to the current status of the existing technology.

[0006] The technical solution adopted by the present invention to solve the first technical problem mentioned above is: a bridge expansion device, comprising a first beam body, a second beam body, a span plate and a fixed plate, wherein a mounting notch is provided at the beam end of the first beam body, the outer side of the fixed plate is fixedly mounted on the second beam body, the inner side of the fixed plate cooperates with the inner side of the span plate, the outer side of the span plate is provided with a multi-directional variable hinge, and a mounting seat for mounting the multi-directional variable hinge is provided in the mounting notch of the first beam body;

[0007] The feature is that the mounting seat includes a lower supporting seat and an upper pressing seat of a split design, the lower supporting seat is provided with a receiving groove for accommodating the lower part of the multi-directional variable hinge, the upper pressing seat includes a pressing block provided on the top of the lower supporting seat, the pressing block can be pressed against the surface of the upper part of the multi-directional variable hinge, and in this state, the pressing block is connected to the lower supporting seat by a first connecting member;

[0008] The pressing block is provided on one side of the multi-directional hinge, and the pressing block can move toward or away from the multi-directional hinge;

[0009] Alternatively, the pressing blocks are provided on opposite sides of the multi-directional displacement hinge, and the pressing block located on at least one side of the multi-directional displacement hinge can move toward or away from the multi-directional displacement hinge.

[0010] Preferably, the first connecting member is lower than the upper surface of the cross-seam plate, so that after the filling member such as concrete or asphalt is poured, the first connecting member is buried in the filling member and will not be directly affected by the vehicle impact load, which can reduce the probability of the first connecting member loosening.

[0011] To constrain the movement of the pressure block, a slider is provided at the bottom of the movable pressure block, and a chute is provided on the lower support seat for the slider to slide in. The slider is vertically constrained in the chute. The combination of the slider and the chute not only guides the movement of the pressure block, but also constrains the slider vertically.

[0012] Preferably, the pressure block located on one side of the multi-directional displacement hinge can be moved to be located directly below the cross-slit plate, and the cross-slit plate is provided with a strip hole extending along the movement trajectory of the pressure block, and the strip hole is located directly above the movement trajectory of the pressure block, so as to facilitate pushing the pressure block through the strip hole.

[0013] In the above solution, the first connecting member includes a bolt vertically passing through the pressing block and connected to the lower bracket, and a nut threadedly connected to the top of the bolt. The nut is pressed against the top of the pressing block and can be tightened through the strip hole.

[0014] After the telescopic device is installed, it is necessary to pour filling pieces such as concrete, asphalt, etc. Preferably, the strip holes serve as observation holes for observing the filling condition of the filling pieces under the cross-seam plate, so as to facilitate observation of the construction condition of the filling pieces.

[0015] In order to fix the lower supporting seat in the installation slot, a pre-embedded fixing piece is pre-embedded at the bottom of the installation slot, and the lower supporting seat and the pre-embedded fixing piece are fixedly connected via a second connecting piece.

[0016] One structural form of the second connecting member is that the second connecting member is located below the lower supporting seat, the longitudinal section of the second connecting member is annular, and is welded to the lower supporting seat and the embedded fixing member respectively.

[0017] One of the structural forms of the second connecting member is: the longitudinal section of the second connecting member is T-shaped, including a first portion extending vertically and a second portion extending laterally, the first portion is located on the outside of the lower support and the two are welded to each other, the second portion is welded to the upper surface of the embedded steel plate, and a collision prevention plate is also welded to the outside of the first portion.

[0018] Compared with the prior art, the advantages of the present invention are as follows: 1. The present invention divides the mounting seat into an upper pressure seat and a lower support seat. The upper pressure seat includes a pressure block. The pressure block located on at least one side of the multi-directional movable hinge can move toward or away from the multi-directional movable hinge. When the lower part of the multi-directional movable hinge is placed in the accommodating groove, the pressure block is located in the accommodating groove and presses against the surface of the upper part of the multi-directional movable hinge. In this state, the pressure block is connected to the lower support seat through the first connecting member, thereby realizing the positioning of the multi-directional movable hinge. The structural form of the mounting seat is novel; and the first connecting member is not directly connected to the cross-seam plate, and the cross-seam plate will not loosen due to the loosening of the first connecting member. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a cross-sectional view of Example 1 of the present utility model;

[0020] Figure 2 for Figure 1 A top view of

[0021] Figure 3 for Figure 1 A magnified view of point A;

[0022] Figure 4 for Figure 1 A cross-sectional view of the upper pressing seat and the lower supporting seat in the direction of A;

[0023] Figure 5 This is a cross-sectional view of Example 2 of the present utility model;

[0024] Figure 6 for Figure 5 A top view of

[0025] Figure 7 for Figure 5 A cross-sectional view of the upper pressing seat and the lower supporting seat in the direction of A;

[0026] Figure 8 This is a cross-sectional view of Example 3 of the present utility model;

[0027] Figure 9 for Figure 8 Top view of . DETAILED DESCRIPTION

[0028] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0029] Example 1

[0030] like Figures 1 to 4 As shown, the bridge expansion device of this preferred embodiment includes a first beam body 1, a second beam body 2, a span plate 3 and a fixed plate 4. A mounting slot 11 is opened at the beam end of the first beam body 1, the outer side of the fixed plate 4 is fixedly mounted on the second beam body 2, the inner side of the fixed plate 4 cooperates with the inner side of the span plate 3, the outer side of the span plate 3 is provided with a multi-directional displacement hinge 30, and a mounting seat for installing the multi-directional displacement hinge 30 is provided in the mounting slot 11 of the first beam body 1.

[0031] The side of the first beam body 1 close to the second beam body 2 is the inner side, and the side away from the second beam body 2 is the outer side. Similarly, the side of the second beam body 2 close to the first beam body 1 is the inner side, and the side away from the first beam body 1 is the outer side.

[0032] The cross-seam plate 3 and the fixing plate 4 can adopt the matching method in the background art, or can adopt the existing comb plate matching method.

[0033] The length direction is along the direction of vehicle flow, and the multi-directional displacement hinge 30 can be in the form of a rotating shaft, which extends along the width direction of the beam body.

[0034] The above are all existing technologies and will not be described in detail here.

[0035] The mounting seat includes a split-design lower support seat 5 and an upper pressure seat, the lower support seat 5 is provided with a receiving groove 51 for accommodating the lower part of the multi-directional displacement hinge 30, and the upper pressure seat includes a pressure block 6 provided on the top of the lower support seat 5. In this embodiment, pressure blocks 6 are provided on opposite sides of the multi-directional displacement hinge 30, and the pressure blocks 6 on both sides can move toward or away from the multi-directional displacement hinge 30, that is, the pressure blocks 6 on both sides can move toward or away from each other. When the lower part of the multi-directional displacement hinge 30 is placed in the receiving groove 51, the pressure blocks 6 on both sides move to the receiving groove 51 and press against the surface of the upper part of the multi-directional displacement hinge 30, and in this state, the pressure block 6 is connected to the lower support seat 5 through the first connecting member 7. In this way, the first connecting member 7 is not directly connected to the cross-seam plate 3, and the cross-seam plate 3 will not become loose due to the loosening of the first connecting member 7. In addition, the first connecting member 7 is lower than the upper surface of the cross-seam plate 3. After the filling member such as concrete or asphalt is poured, the first connecting member 7 is buried in the filling member and will not be directly affected by the vehicle impact load, which can reduce the probability of the first connecting member 7 loosening.

[0036] The first connecting member 7 includes a bolt 71 vertically passing through the pressing block 6 and connected to the lower bracket 5 , and a nut 72 threadedly connected to the top of the bolt 71 , and the nut 72 presses against the top of the pressing block 6 .

[0037] The pressure block 6 located on one side of the multi-directional displacement hinge 30 is located directly below the cross-slit plate 3. The cross-slit plate 3 is provided with a strip hole 31 extending along the movement trajectory of the pressure block 6, and the strip hole 31 is located directly above the movement trajectory of the pressure block 6, so that the pressure block 6 can be pushed through the strip hole 31, and the nut 72 can be tightened through the strip hole 31.

[0038] In addition, after the telescopic device is installed, it is necessary to pour filling pieces such as concrete, asphalt, etc. The strip holes 31 serve as observation holes for observing the filling conditions of the filling pieces below the cross-seam plate 3, so as to observe the construction conditions of the filling pieces and control the construction quality.

[0039] To constrain the movement of the pressing block 6, a slider 61 is provided at the bottom of the pressing block 6. A chute 52 is provided on the lower support 5 for the slider 61 to slide within. The slider 61 is vertically constrained in the chute 52. The combination of the slider 61 and the chute 52 not only guides the movement of the pressing block 6, but also vertically constrains the slider 61. In this embodiment, the longitudinal cross-sections of the slider 61 and the chute 52 are both I-shaped.

[0040] In order to fix the lower supporting seat 5 in the installation slot 11 , a pre-embedded fixing member 8 is pre-embedded at the bottom of the installation slot 11 . The lower supporting seat 5 and the pre-embedded fixing member 8 are fixedly connected via a second connecting member 9 .

[0041] In this embodiment, the embedded fixing part 8 is an embedded steel plate, and the longitudinal section of the second connecting part 9 is T-shaped, including a first part 91 extending vertically and a second part 92 extending laterally. The first part 91 is located on the outside of the lower support seat 5 and the two are welded to each other. The second part 92 is welded to the upper surface of the embedded fixing part 8, and a collision prevention plate 0 is also welded to the outside of the first part 91.

[0042] During installation, first fix the lower support seat 5, move the two pressure blocks 6 away from each other, and after the lower part of the multi-directional displacement hinge 30 is placed in the accommodating groove 51, move the two pressure blocks 6 toward each other until they are against the upper part of the multi-directional displacement hinge 30, and then connect the upper pressure seat and the lower support seat 5 through the first connecting member 7.

[0043] In this embodiment, the pressing blocks 6 on both sides of the multi-directional hinge 30 are movable. Of course, only one side of the pressing block 6 can also be movable. The two pressing blocks 6 can move closer to or farther away from each other. When the multi-directional hinge 30 needs to be positioned, the pressing blocks 6 on both sides are located in the receiving groove 51 and press against the upper surface of the multi-directional hinge 30. In the case where only one side of the pressing block 6 is movable, it is sufficient to provide a slider 61 at the bottom of the movable pressing block 6. If the movable pressing block 6 is located directly below the cross-slit plate 3, the cross-slit plate 3 needs to be provided with a strip hole 31.

[0044] A pressure block 6 may be provided on only one side of the multi-directional hinge 30 , and the pressure block 6 may be moved toward or away from the multi-directional hinge 30 to press against the upper surface of the multi-directional hinge 30 or move away from the multi-directional hinge 30 .

[0045] Example 2

[0046] like Figures 5-7 As shown, the difference between Example 2 and Example 1 is that the structure of the first connecting member 7 is different. For other details, please refer to Example 1.

[0047] In this embodiment, the first connecting member 7 includes a fixed head 73 fixed on the pressure block 6 and a connecting column 74 on the fixed head 73 that can move up and down. The connecting column 74 maintains a downward movement tendency under the action of the elastic member, and the lower bracket 5 is provided with a slot 52 for the connecting column to be inserted into.

[0048] During the movement of the pressing block 6, the squeezing of the lower support seat 5 will cause the connecting column 74 to shrink in the fixed head 73. When the connecting column 74 corresponds to the slot 52 in the vertical direction, the connecting column 74 is inserted downward into the slot 52 under the action of the elastic member, thereby realizing the connection between the pressing head 6 and the lower support seat 5.

[0049] Example 3

[0050] like Figures 8-9 As shown, the difference between Example 3 and Example 1 is that the structure of the second connecting member 9 is different. For other details, please refer to Example 1.

[0051] In this embodiment, the second connecting member 9 is located below the lower supporting seat 5. The second connecting member 9 has a ring-shaped longitudinal section and is welded to the lower supporting seat 5 and the embedded fixing member 8 respectively. The embedded fixing member 8 is an embedded steel bar.

[0052] After the filling member is cast, the first connecting member 7 of each of the above embodiments will be buried in the filling member to reduce the impact of the vehicle load. The number of the first connecting member 7 and the second connecting member 9 can be adjusted according to actual conditions; the upper pressure seat and the lower support seat 5 after being connected and fixed can ensure the rotation of the multi-directional variable hinge 30 around its axis, and at the same time limit the movement of the multi-directional variable hinge 30 in other directions. When installing the telescopic device in each of the above embodiments, the lower support seat 5 is fixed first, and then the upper pressure seat is installed.

[0053] A water stop is provided between the first beam 1 and the second beam 2 in each of the above embodiments, which is the existing technology; the installation between the fixing plate 4 and the second beam 2 adopts the existing technology and will not be repeated here; the cross-seam plate 3 in each of the above embodiments can be welded to the embedded fixing part 8 through a third connecting part, and the third connecting part can adopt a structure in which bolts and nuts are matched.

[0054] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A bridge expansion device, comprising a first beam body (1), a second beam body (2), a span plate (3) and a fixed plate (4), wherein a mounting notch (11) is provided at the beam end of the first beam body (1), the outer side of the fixed plate (4) is fixedly mounted on the second beam body (2), the inner side of the fixed plate (4) is matched with the inner side of the span plate (3), the outer side of the span plate (3) is provided with a multi-directional displacement hinge (30), and a mounting seat for mounting the multi-directional displacement hinge (30) is provided in the mounting notch (11) of the first beam body (1); It is characterized by: The mounting seat comprises a lower supporting seat (5) and an upper pressing seat of a split design, wherein the lower supporting seat (5) is provided with a receiving groove (51) for accommodating the lower part of the multi-directional displacement hinge (30), and the upper pressing seat comprises a pressing block (6) provided on the top of the lower supporting seat (5), wherein the pressing block (6) can press against the surface of the upper part of the multi-directional displacement hinge (30), and in this state, the pressing block (6) is connected to the lower supporting seat (5) via a first connecting member (7); The pressing block (6) is provided on one side of the multi-directional displacement hinge (30), and the pressing block (6) can move toward or away from the multi-directional displacement hinge (30); Alternatively, the pressure blocks (6) are provided on opposite sides of the multi-directional displacement hinge (30), and the pressure block (6) located on at least one side of the multi-directional displacement hinge (30) can move toward or away from the multi-directional displacement hinge (30).

2. The bridge expansion device according to claim 1, characterized in that: The first connecting member (7) is lower than the upper surface of the cross-seam plate (3).

3. The bridge expansion device according to claim 1, characterized in that: A slider (61) is provided at the bottom of the movable pressing block (6), and a slide groove (52) for the slider (61) to slide is provided on the lower supporting seat (5), and the slider (61) is vertically constrained in the slide groove (52).

4. The bridge expansion device according to claim 1, characterized in that: The pressing block (6) located on one side of the multi-directional displacement hinge (30) can be moved to be located directly below the cross-slit plate (3); the cross-slit plate (3) is provided with a strip hole (31) extending along the movement trajectory of the pressing block (6), and the strip hole (31) is located directly above the movement trajectory of the pressing block (6).

5. The bridge expansion device according to claim 4, characterized in that: The first connecting member (7) comprises a bolt (71) vertically passing through the pressing block (6) and connected to the lower bracket (5), and a nut (72) threadedly connected to the top of the bolt (71), and the nut (72) is pressed against the top of the pressing block (6).

6. The bridge expansion device according to claim 4, characterized in that: The strip-shaped hole (31) serves as an observation hole for observing the filling condition of the filling piece below the cross-seam plate (3).

7. The bridge expansion device according to any one of claims 1 to 6, characterized in that: A pre-embedded fixing member (8) is pre-embedded at the bottom of the installation notch (11), and the lower support seat (5) and the pre-embedded fixing member (8) are fixedly connected via a second connecting member (9).

8. The bridge expansion device according to claim 7, characterized in that: The second connecting member (9) is located below the lower supporting seat (5). The second connecting member (9) has a ring-shaped longitudinal section and is welded to the lower supporting seat (5) and the embedded fixing member (8) respectively.

9. The bridge expansion device according to claim 7, characterized in that: The longitudinal section of the second connecting member (9) is T-shaped, comprising a first portion (91) extending vertically and a second portion (92) extending horizontally, the first portion (91) being located outside the lower support seat (5) and the two being welded together, the second portion (92) being welded to the upper surface of the embedded fixing member (8), and an anti-collision plate (0) being welded to the outside of the first portion (91).

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