Large-span bridge vibration suppression device

Abstract

The large-span bridge vibration suppression device comprises an overhauling guide rail and a flow guide plate, the overhauling guide rail is arranged on a box girder bottom plate, the flow guide plate is arranged on the windward side of the overhauling guide rail, the flow guide plate is connected to the box girder bottom plate through a connecting frame, and the flow guide plate is detachably connected with the connecting frame. According to the vibration suppression device for the large-span bridge, wind-induced vibration of the bridge is effectively reduced, and convenience of follow-up maintenance of the guide plate is improved.

Description

Technical Field

[0001] The utility model belongs to the field of long-span bridges, and in particular relates to a vibration suppression device for long-span bridges. Background Art

[0002] Large-span bridges are usually prone to wind-induced vibration phenomena, such as flutter and vortex-induced oscillation. The vortex-induced oscillation of large-span bridges under the action of natural wind will affect the operation and erection of the bridge, and further cause fatigue of the main structure of the bridge.

[0003] At present, a guide device is usually arranged on the outside of the bridge to reduce the impact of wind-induced vibration on the bridge. However, the existing guide device is usually directly welded to the structural frame, so that the structural frame and the guide device need to be installed to the outside of the bridge at the same time. During the installation process and subsequent maintenance process, the overall structure of the guide device and the structural frame is large, and the installation is difficult. At the same time, the guide device cannot be disassembled separately during maintenance, so only simple maintenance can be performed. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a vibration suppression device for a large-span bridge, which effectively reduces the wind-induced vibration of the bridge and improves the convenience of subsequent maintenance of the guide plate.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A vibration suppression device for a long-span bridge, the device comprising an inspection rail and a guide plate, the inspection rail being arranged on a box girder bottom plate, the guide plate being arranged on a windward side of the inspection rail, the guide plate being connected to the box girder bottom plate via a connecting frame, and the guide plate and the connecting frame being detachably connected.

[0007] Further, a slide rail is obliquely arranged on the lower side of the connecting frame, and a slider matching the slide rail is arranged on the guide plate, so that the slider and the slide rail are movable and matched. This is a preferred detachable connection mode, and of course, other detachable connection modes can also be adopted.

[0008] Preferably, a positioning groove is provided on one side of the connecting frame, and the end of the positioning groove passes through a slide rail, a positioning pin is movably installed inside the positioning groove, and a positioning hole is provided on the sliding block, so that the positioning pin can pass through the positioning groove and the positioning hole in sequence to position the guide plate.

[0009] More preferably, the end of the positioning pin is arranged in an arc-shaped structure, the end of the sliding block has a slope structure, and the slope structure cooperates with the end of the positioning pin.

[0010] The connecting frame is provided with a fastener, and the end of the fastener abuts against the positioning pin.

[0011] Furthermore, reinforcing ribs are provided on the inner side of the connecting frame.

[0012] Preferably, the reinforcing ribs form a triangular supporting structure.

[0013] More preferably, a middle beam is provided in the triangular support structure closest to the guide plate, a fastener is movably mounted on the middle beam, and an end of the fastener abuts against the positioning pin.

[0014] The fastener is threadedly matched with the center beam, and an indicator groove is provided on the side of the fastener. When the indicator groove is located at the center beam position, there is a gap between the end of the fastener and the positioning pin, so that the positioning pin can move relative to the positioning groove.

[0015] A groove is formed on one end side of the positioning pin away from the guide plate.

[0016] The technical concept of the utility model is: to guide the airflow on the windward side of the inspection rail through the guide plate, reduce the wind-induced vibration of the inspection rail caused by natural wind, and thus improve the overall stability of the bridge. At the same time, due to the detachable connection between the guide plate and the connecting frame, the guide plate does not need to be installed synchronously with the connecting frame during installation, which reduces the difficulty of installation. At the same time, when the guide plate is subsequently maintained, more maintenance methods can be used for the guide plate, and the guide plate can be replaced from the connecting frame.

[0017] The beneficial effects of the utility model are mainly manifested in: effectively reducing the wind-induced vibration of the bridge and improving the convenience of subsequent maintenance of the guide plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 This utility model Figure 1 A partial enlarged view of point A in the middle.

[0020] Figure 3 This utility model Figure 1 A partial enlarged view of point B in the middle.

[0021] Figure 4 It is an axonometric view of the connecting frame in the utility model.

[0022] Figure 5 It is a side view of the connecting piece in the utility model.

[0023] Figure 6 It is a schematic diagram of the connection between the connecting frame and the guide plate in the utility model.

[0024] The accompanying drawings are marked as follows: 1. box beam bottom plate; 2. maintenance guide rail; 3. guide plate; 4. connecting frame; 5. slide rail; 6. slider; 7. positioning groove; 8. positioning pin; 9. positioning hole; 10. inclined structure; 11. reinforcing rib; 12. triangular supporting structure; 13. middle beam; 14. fastener; 15. indicator groove; 16. groove. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings.

[0026] Reference Figure 1 to Figure 6 A vibration suppression device for a long-span bridge, the device includes an inspection rail 2 and a guide plate 3, the inspection rail 2 is arranged on the box girder bottom plate 1, the guide plate 3 is arranged on the windward side of the inspection rail 2, the guide plate 3 is connected to the box girder bottom plate 1 through a connecting frame 4, and the guide plate 3 and the connecting frame 4 are detachably connected.

[0027] The guide plate 3 is used to guide the airflow on the windward side of the inspection guide rail 2, so as to reduce the wind-induced vibration of the inspection guide rail 2 caused by natural wind, thereby improving the overall stability of the bridge. At the same time, due to the detachable connection between the guide plate 3 and the connecting frame 4, the guide plate 3 does not need to be installed synchronously with the connecting frame 4 during installation, which reduces the difficulty of installation. At the same time, when the guide plate 3 is subsequently maintained, more maintenance methods can be used for the guide plate 3, and the guide plate 3 can be replaced from the connecting frame 4.

[0028] It is worth mentioning that since the maintenance guide rail 2 is protruding from the outside of the box girder bottom plate 1, when the bridge is affected by natural wind, the position of the maintenance guide rail 2 is greatly affected by wind-induced vibration. Therefore, the natural wind on the windward side of the maintenance guide rail 2 is guided by the guide plate 3, which can effectively reduce the degree of influence of wind-induced vibration on the entire bridge.

[0029] Preferably, a slide rail 5 is obliquely provided on the lower side of the connecting frame 4 , and a slider 6 matching the slide rail 5 is provided on the guide plate 3 , so that the slider 6 and the slide rail 5 are in movable cooperation.

[0030] Specifically, when installing the guide plate 3, the slider 6 is inserted into the position corresponding to the slide rail 5, so that the slider 6 slides down along the inclined slide rail 5, thereby driving the guide plate 3 to be installed obliquely, and then the guide plate 3 and the slider 6 are locked in the slide rail 5 through the gravity of the guide plate 3 and the slider 6, so that the guide plate 3 is installed on the connecting frame 4, which improves the convenience of installation and subsequent maintenance.

[0031] Preferably, a positioning groove 7 is provided on one side of the connecting frame 4, and the end of the positioning groove 7 passes through the slide rail 5. A positioning pin 8 is movably installed inside the positioning groove 7, and a positioning hole 9 is provided on the slider 6, so that the positioning pin 8 passes through the positioning groove 7 and the positioning hole 9 in sequence to position the guide plate 3.

[0032] Specifically, after the slider 6 has completed its movement along the slide rail 5, the positioning pin 8 passes through the positioning groove 7 and the positioning hole 9, so that the positioning pin 8 positions the position of the slider 6, and then positions the guide plate 3, thereby improving the stability of the installation of the guide plate 3. At the same time, since the positioning pin 8 can be moved relative to the positioning groove 7, the positioning pin 8 can be pulled out of the positioning groove 7, thereby facilitating the maintenance of the guide plate 3.

[0033] In one embodiment of the present solution, the positioning pin 8 is located on the leeward side of the guide plate 3 , so that the guide plate 3 can shield the position of the positioning pin 8 , thereby improving the stability of the use of the positioning pin 8 .

[0034] Preferably, the end of the positioning pin 8 is arranged in an arc-shaped structure, the end of the sliding block 6 has an inclined surface structure 10 , and the inclined surface structure 10 corresponds to the end of the positioning pin 8 .

[0035] Specifically, the positioning pin 8 is initially located in the positioning groove 7. When the slider 6 slides down along the slide rail 5, the inclined structure 10 at the end of the slider 6 contacts the end of the positioning pin 8, so that the inclined structure 10 of the slider 6 pushes the arc-shaped structure position of the end of the positioning pin 8, so that the positioning pin 8 moves up along the positioning groove 7 to facilitate the passage of the slider 6. After the slider 6 completes the movement, the positioning hole 9 moves to one side of the positioning groove 7, so that the positioning pin 8 can fall again and be inserted into the positioning hole 9 to complete the fixation of the guide plate 3 by the positioning pin 8.

[0036] Preferably, a plurality of reinforcing ribs 11 are provided on the inner side of the connecting frame 4 .

[0037] Specifically, the structural stability of the connecting frame 4 is increased by the reinforcing ribs 11, thereby ensuring that the guide plate 3 guides the natural wind stably.

[0038] Preferably, a plurality of triangular support structures 12 are formed on the inner side of the connecting frame 4 through a plurality of reinforcing ribs 11 .

[0039] Specifically, the triangular structure is used for stable support to improve the structural strength of the inner side of the connecting frame 4.

[0040] Preferably, a middle beam 13 is provided in the triangular support structure 12 closest to the guide plate 3 , and a fastener 14 is movably installed on the middle beam 13 , and an end of the fastener 14 abuts against the positioning pin 8 .

[0041] Specifically, when the natural wind intensity is relatively high and the vibration of the guide plate 3 is relatively obvious, in order to prevent the positioning pin 8 from moving upward along the positioning groove 7 after being vibrated and causing the guide plate 3 to lose its positioning function, the present solution provides a fastener 14 so that the end of the fastener 14 is against the positioning pin 8, thereby ensuring the stability of the positioning pin 8.

[0042] It is worth mentioning that the setting of the fastener 14 is not fixed. It is only considered to be installed when the guide plate 3 vibrates significantly and other situations may easily cause the positioning pin 8 to be unstable. The center beam 13 and the connecting frame 4 are integrally formed. Before designing the connecting frame 4, it is preferred to measure the area where the bridge is erected to determine whether the connecting frame 4 processes the center beam 13 structure and whether the fastener 14 will be used later.

[0043] Preferably, the fastener 14 is threadedly matched with the center beam 13, and an indicator groove 15 is provided on the side of the fastener 14. When the indicator groove 15 is located at the position of the center beam 13, there is a gap between the end of the fastener 14 and the positioning pin 8, so that the positioning pin 8 can move relative to the positioning groove 7.

[0044] Specifically, the position of the fastener 14 relative to the center beam 13 can be adjusted by rotating the fastener 14. When the guide plate 3 needs to be installed, the fastener 14 is moved to the area corresponding to the indicating groove 15 and the position of the center beam 13, so that there is a gap between the end of the fastener 14 and the positioning pin 8, so that the slider 6 can smoothly push the positioning pin 8. After the guide plate 3 is installed, the fastener 14 is continued to be rotated so that the end of the fastener 14 is against the positioning pin 8, and the positioning pin 8 is positioned by the fastener 14.

[0045] Preferably, a groove 16 is formed on one end side of the positioning pin 8 away from the guide plate 3 .

[0046] Specifically, when the positioning pin 8 needs to be pulled out, the end of a tool such as a wrench can be buckled in the groove 16, and the positioning pin 8 can be pushed from the position of the groove 16 to assist the positioning pin 8 to be disengaged from the positioning groove 7.

[0047] The contents described in the embodiments of this specification are merely enumerations of implementation forms of the utility model concept and are for illustrative purposes only. The protection scope of the utility model should not be considered to be limited to the specific forms described in this embodiment, and the protection scope of the utility model also extends to equivalent technical means that ordinary technicians in this field can think of based on the concept of the utility model.

Claims

1. A long-span bridge vibration suppression device, characterized in that: The device includes an inspection rail and a guide plate, the inspection rail is arranged on the bottom plate of the box beam, the guide plate is arranged on the windward side of the inspection rail, the guide plate is connected to the bottom plate of the box beam through a connecting frame, and the guide plate and the connecting frame are detachably connected; a slide rail is obliquely arranged on the lower side of the connecting frame, and the guide plate is provided with a slider matching the slide rail so that the slider and the slide rail can be movably matched; a positioning groove is provided on one side of the connecting frame, and the end of the positioning groove passes through the slide rail, a positioning pin is movably installed inside the positioning groove, and a positioning hole is provided on the slider so that the positioning pin can position the guide plate after passing through the positioning groove and the positioning hole in sequence.

2. A long-span bridge vibration suppression device as claimed in claim 1, characterized in that: The end of the positioning pin is arranged in an arc-shaped structure, the end of the sliding block has an inclined surface structure, and the inclined surface structure cooperates with the end of the positioning pin.

3. A long-span bridge vibration suppression device as claimed in claim 1, characterized in that: The connecting frame is provided with a fastener, and the end of the fastener abuts against the positioning pin.

4. A long-span bridge vibration suppression device as claimed in any one of claims 1 to 3, characterized in that: The inner side of the connecting frame is provided with reinforcing ribs.

5. A long-span bridge vibration suppression device as claimed in claim 4, characterized in that: The reinforcing ribs form a triangular support structure.

6. A long-span bridge vibration suppression device as claimed in claim 5, characterized in that: A middle beam is arranged in the triangular support structure closest to the guide plate, and a fastener is movably installed on the middle beam, and an end of the fastener abuts against the positioning pin.

7. A long-span bridge vibration suppression device as claimed in claim 6, characterized in that: The fastener is threadedly matched with the center beam, and an indicator groove is provided on the side of the fastener. When the indicator groove is located at the center beam position, there is a gap between the end of the fastener and the positioning pin, so that the positioning pin can move relative to the positioning groove.

8. A long-span bridge vibration suppression device as claimed in any one of claims 1 to 3, characterized in that: A groove is formed on one end side of the positioning pin away from the guide plate.

Images