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Rotatable blade flow-guiding device for notched box girder bridge

A technology of rotating blades and diversion devices, applied in bridges, bridge parts, bridge construction, etc., can solve the lack of adjustability or controllability of wind-induced vibration changes, affecting the vision of bridge walking or driving, and insufficient device connection. Firmness and other issues, to achieve the effect of easy installation and disassembly, long service life, convenient installation and disassembly

Pending Publication Date: 2018-02-16
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In addition, there are other ways to solve "vortex induced resonance", but the current way has the following defects more or less: (1) it may affect the vision of walking or driving on the bridge; (2) the device The diversion form is relatively fixed, and it lacks adjustability or controllability to the actual wind-induced vibration changes of the built bridge; (3) The connection method of the device is not strong enough, easy to be damaged, and has a short service life

Method used

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  • Rotatable blade flow-guiding device for notched box girder bridge
  • Rotatable blade flow-guiding device for notched box girder bridge
  • Rotatable blade flow-guiding device for notched box girder bridge

Examples

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Embodiment 1

[0044] A rotatable vane deflector for slotted box girder bridges, see Figure 1-Figure 4 , including a plurality of vane flow guide units 1 and wind speed measuring devices 2 arranged side by side at each slot, figure 1 8 are shown in , and two adjacent vane flow guiding elements 1 are arranged independently of each other.

[0045] For the structure of the vane guide unit 1, see Figure 2-Figure 4 , including guide vane group 1.1, rotating shaft group 1.2, rotating power source 1.3 and frame 1.4, details are as follows:

[0046] The guide vane set 1.1 includes a plurality of guide vanes 1.11 ( figure 2 and image 3 Twelve pieces are shown in the figure), a plurality of guide vanes 1.11 are arranged side by side (arranged from left to right here), and the minimum distance between two adjacent guide vanes 1.11 is 1- 10 mm, preferably 2-5 mm; the minimum distance between the two guide vanes 1.11 at the ends (here may be the leftmost and rightmost ends) to the inner wall of t...

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Abstract

The invention discloses a rotatable blade flow-guiding device for a notched box girder bridge. The rotatable blade flow-guiding device comprises a blade flow-guiding single part which comprises a flow-guiding blade set, a rotating shaft set, a rotating power source and a frame used for enabling flow-guiding blades and other components to be assembled into a whole and to be conveniently mounted ina central notch of the bridge. The rotating power source provides rotating power for a rotating shaft in the rotating shaft set. By applying the technical scheme, the rotatable blade flow-guiding device has the effects that the blade flow-guiding single part is arranged at the notch of the bridge, so that the visual requirement of operation is not affected; the rotating shaft set of the blade flow-guiding single part is controlled by the rotating power source to rotate, so that the flow-guiding blade set is driven to rotate synchronously, and by controlling the rotating angle and the rotatingangular speed of the flow-guiding blades, the airflow flowing feature at the central notch can be improved, and the requirement that the flutter performance of the bridge is not affected while vortexvibration is restrained is met; and the rotating angle of the flow-guiding blades can be properly adjusted and optimized in real time, good adjustability or controllability is achieved during actual operation, and the adaptability is improved.

Description

technical field [0001] The invention relates to the technical field of bridges, in particular to a rotatable vane guide device for slotted box girder bridges. Background technique [0002] With the continuous improvement of the span of long-span bridges, the problem of the bridge's wind resistance stability is becoming more and more prominent. As a control measure that can effectively improve the flutter stability of structures, the central slotting of bridge sections has been used more and more in engineering practice, but the following problems have also appeared: large-span central slotting box When the wind speed is not high, the bridge will appear "vortex induced resonance" phenomenon, and produce a large "vortex induced resonance" amplitude, which will have a great impact on the normal operation of the bridge and driving comfort. The influence of air flow characteristics at the central slot on "vortex induced resonance" cannot be ignored. In order to suppress the gene...

Claims

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Application Information

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IPC IPC(8): E01D2/04E01D19/00
CPCE01D2/04E01D19/00
Inventor 黄东梅何华欧俊伟
Owner CENT SOUTH UNIV
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