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Cup-shaped noise reduction and sound absorption member

A noise reduction and sound absorption technology, which is applied in the direction of noise absorption devices and buildings, can solve the problems of not causing sound barriers, and achieve the effects of enhancing sound absorption capacity, achieving impedance matching, and efficient absorption

Active Publication Date: 2013-02-13
秦皇岛耀华装备集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to improve the comprehensive sound absorption performance of the sound barrier, some manufacturers have made some optimizations and changes in the shape of the perforated panel of the sound barrier, but it has not attracted enough attention from the sound barrier industry.

Method used

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  • Cup-shaped noise reduction and sound absorption member
  • Cup-shaped noise reduction and sound absorption member
  • Cup-shaped noise reduction and sound absorption member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 , figure 2 As shown, the cup-shaped noise-reducing and sound-absorbing member of the present invention is composed of several cup-shaped noise-reducing and sound-absorbing member units 11, and each cup-shaped noise-reducing and sound-absorbing member unit 11 includes a panel 1, a backboard 2, a sound insulation board 3. Sound-absorbing cotton 4, gauze 5, support frame 9 and end plate 10; wherein the panel 1 is placed facing the railway track, and is composed of several rectangular arrays and trapezoidal transverse ribs 103, each rectangular array is composed of several paraboloid shaped acoustic bars. The reflective cups 101 of the structure are evenly distributed, and the two groups of arrays are connected by vertically arranged transverse ribs 103. A diffraction hole 102 with the same radius as the focal plane of the parabolic surface is opened at the bottom of each reflective cup 101; the cross section of the back plate 2 is The opening is rectangu...

Embodiment 2

[0042] The structure and installation method of this embodiment are the same as those of the first embodiment, the difference lies in that the specifications and dimensions of the cup-shaped noise-reducing and sound-absorbing component unit 11 and the column 13 are different from those of the first embodiment. The size of the cup-shaped noise-reducing and sound-absorbing component unit 11 of this embodiment is 3940*500*140mm, and the spacing of the columns 13 is 4000mm; the parabolic equation of the busbar of the reflecting cup 101 is y 2 =15x, the parameters of each element are the radius r=7.5mm of the focal plane circle, the aperture=15mm of the diffraction hole 102, the diameter of the tangent circle is 50mm, the center of the circle is 47.1mm apart from the position distance of the apex, and the radius R of the largest circle is 1 =27mm; the rectangular connecting groove 202 at the upper and lower ends of the backboard 2 is 80mm wide and 23mm deep, and the specification of...

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Abstract

The invention belongs to the technical field of a sound barrier acoustic member, and specifically relates to a cup-shaped noise reduction and sound absorption member of a sound barrier. The cup-shaped noise reduction and sound absorption member is composed of a plurality of cup-shaped noise reduction and sound absorption member units, wherein a panel of each unit is composed of a plurality of rectangular arrays and trapezoidal transverse bars; each rectangular array is composed of a plurality of uniformly distributed reflector cups with a paraboloid-shaped acoustic construction; diffraction holes are formed in the bottom of each reflector cup; a rectangular connecting groove is respectively arranged in the longitudinal center on the upper surface and the lower surface of a back plate of each unit; the connecting groove and the rectangular connecting grooves of other sound absorption member units in the same position form a square cavity during installation, wherein a square steel pipe is embedded in the cavity as a connecting piece for clamping two adjacent cup-shaped noise reduction and sound absorption member units; a sound insulation plate is mounted in a tubular cavity which is formed by connecting the panel and the back plate; support frames are arranged on the transverse bars inside the cavity; and spaces divided by the support frame are filled with sound absorption wools and gauzes. The cup-shaped noise reduction and sound absorption member has stronger sound absorption ability, and the low-frequency sound absorption ability is improved.

Description

technical field [0001] The invention belongs to the technical field of acoustic components of a sound barrier, and in particular relates to a cup-shaped noise-reducing and sound-absorbing component of a sound barrier. Background technique [0002] In recent years, my country's railway construction has achieved leapfrog development, especially the construction of high-speed railways. With the completion of the Beijing-Tianjin intercity train and the Wuhan-Guangzhou high-speed railway, as well as the operation of the Beijing-Shanghai high-speed railway, a large-scale high-speed railway construction is in full swing. The emergence of high-speed railways has accelerated the turnover of logistics and brought great convenience to people's travel; but at the same time, it has also brought some inconvenience and impact to people's production and life. The environmental noise hazards brought by high-speed trains It is one of them, especially when the high-speed rail passes through s...

Claims

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Application Information

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IPC IPC(8): E01F8/00
Inventor 付秀君王小林黎燕倪晓利耿宏亮章韬
Owner 秦皇岛耀华装备集团股份有限公司
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