Sound absorbing device used for U-beam composite structure of light rail

A technology of sound absorption device and composite structure, applied in the direction of noise absorption device, building, etc., can solve the problems of unstable installation, unsafe, large eccentric distance, etc., and achieve the effect of long service life, low cost and noise reduction

Active Publication Date: 2015-05-20
QINGDAO SENDATA TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although its noise reduction effect is better, it is no different from the existing noise reduction barrier, and still has the above-mentioned defects of the sound barrier.
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Method used

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  • Sound absorbing device used for U-beam composite structure of light rail
  • Sound absorbing device used for U-beam composite structure of light rail

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Embodiment Construction

[0018] A sound-absorbing device for light rail U-beam composite structure of the present invention will be described in detail below with reference to the accompanying drawings.

[0019] like figure 1 As shown, it is a sound-absorbing device for light rail U-shaped beam composite structure, including a sound-absorbing device body, and the sound-absorbing device body consists of micro-perforated plate 1, tin foil 2, sound-absorbing cotton 3, and cavity 4 and the bottom plate 5, the surface of the micro-perforated plate 1 is provided with micro-holes 11 at a certain distance, the height of the micro-perforated plate 1 is 1 mm, the diameter of the micro-holes 11 is <1 mm, and the perforation rate is 1% to 5%. The upper part of the sound-absorbing cotton 3 is closely attached to the tin foil 2, and the thickness of the tin foil is 0.1 mm, which can prevent dust and rain. In addition, after applying the tin foil 2 to the sound-absorbing cotton 3, its sound-absorbing performance ha...

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Abstract

The invention relates to the field of light-rail sound absorption, in particular to a sound absorbing device used for the U-beam composite structure of the light rail. The sound absorbing device comprises a sound absorbing device body, the sound absorbing device body is composed of a microporous plate, tin foil, sound absorbing cotton, a cavity and a bottom plate from outside to inside, the surface of the microporous plate is provided with micropores spaced, the tin foil is closely attached above the sound absorbing cotton, spaced projections are arranged on the bottom plate, and the height of the projections is identical with the height of the cavity. The sound absorbing device is of composite structure, the microporous plate is an aluminum alloy pore plate or an inorganic pore plate, the bottom plate is molded by PVC (polyvinyl chloride) alloy materials by a vacuum casting process. The sound absorbing device is filled with the sound absorbing cotton (with noise reduction coefficient larger than or equal to 0.88), and is specially designed from the aspects of flow resistance of an acoustic panel absorber, porosity, structure factor, thickness, density, surface material treatment and mounting, advantages of various single materials can be sufficiently given into play, high, medium and low frequency broad-spectrum noise is reduced, and the sound absorbing device has the advantages of simplicity, convenience, attractive appearance and practicality.

Description

technical field [0001] The invention relates to the field of light rail noise reduction, and relates to a sound absorption device for a light rail U-shaped beam composite structure. It can effectively reduce the radiation of track noise, and at the same time, it can be used as a guard plate for light rail U-beam cable trays, which plays a very good role in the overall noise reduction of rail transit. Background technique [0002] With the rapid development of my country's economy and the rapid advancement of industrialization and urbanization. In recent years, the number of railways, highways, subways and urban light rails has increased day by day. While it is convenient for people to travel, it has become the fourth largest pollution after air pollution, water pollution and solid waste pollution. Therefore, the problem of noise pollution control has become become urgent social problems. At present, the noise generated in traffic facilities is the most important thing. Th...

Claims

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Application Information

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IPC IPC(8): E01F8/00
Inventor 王高沂路炳实
Owner QINGDAO SENDATA TECH
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