Easy-to-maintain ventilation type sound barrier

Abstract

The invention relates to an easy-to-maintain ventilation type sound barrier. The sound barrier comprises a composite ventilation unit plate and a top end noise reduction plate arranged at the top endof the composite ventilation unit plate, the composite ventilation unit plate comprises a metal framework, a movable noise reduction plate, an embedded noise reduction plate and a transparent plate, and the movable noise reduction plate, the embedded noise reduction plate and the transparent plate are installed on the metal framework; shutter holes are formed in the surfaces, facing the sound source direction, of the movable noise reduction plate and the embedded noise reduction plate, and the surface, facing the sound source direction, of the top end noise reduction plate is subjected to galling treatment. According to the main principle of ventilation, a rotating shaft of the movable noise reduction plate is eccentrically arranged, unbalance loading can be generated under the action of cross wind, the noise reduction plate rotates around the shaft, when the wind area and weight of the noise reduction plate are fixed, the deflection angle of the noise reduction plate can be changed along with the change of the wind speed, a ventilation unloading channel can be opened to different degrees, and the purpose of ventilation unloading is achieved. In addition, both the movable noise reduction plate and the embedded noise reduction plate can be detached from the sound barrier, and the purpose of easy maintenance is achieved.

Description

technical field [0001] The invention relates to the technical field of sound-absorbing and insulating sound barriers, in particular to an easy-to-maintain ventilation sound barrier. Background technique [0002] In recent years, with the continuous improvement of my country's economic level, various transportation infrastructures across the country have flourished and become more and more perfect. As of the end of 2019, 29 of my country's 31 provinces (autonomous regions and municipalities) have opened subways (Hohhot and Taiyuan are under construction), and many non-provincial capital cities are about to enter the subway era. Although it provides convenience for people's travel, the accompanying noise problem is becoming more and more prominent. In some areas, there is even a phenomenon that the transportation infrastructure "convenience also disturbs the people". Therefore, it is imminent to solve the problem of noise pollution. [0003] At present, the most effective wa...

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Problems solved by technology

[0004] Although some scholars and teams in China have developed ventilated sound barriers, these sound barriers are either fully enclosed structures with huge volumes that occupy a lot of space; low cost high

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