CN102418321A - Noise reduction device at top end of sound barrier - Google Patents
Noise reduction device at top end of sound barrier Download PDFInfo
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- CN102418321A CN102418321A CN2010105957849A CN201010595784A CN102418321A CN 102418321 A CN102418321 A CN 102418321A CN 2010105957849 A CN2010105957849 A CN 2010105957849A CN 201010595784 A CN201010595784 A CN 201010595784A CN 102418321 A CN102418321 A CN 102418321A
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- sound barrier
- horizontal cylinder
- cylindrical shell
- denoising device
- chamber
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Abstract
The invention relates to a noise reduction device for a road or a railway. The noise reduction device at the top end of a sound barrier comprises a cylinder. The cylinder comprises a horizontal cylinder and a vertical cylinder. The horizontal cylinder and the vertical cylinder are combined into an integral inverted L-shaped or T-shaped structure. The junctions of the horizontal cylinder and the vertical cylinder are transitioned smoothly. The horizontal cylinder and the vertical cylinder are respectively provided with a sound absorbing layer. The sound barrier provided by the invention not only has a high acoustic performance, but also can reduce the height of the visible height of the sound barrier and has a top end beautification effect; and components have very good structural strength, have good outdoor durability, have light weight and high strength and can be widely used at the top ends of sound barriers for the railway along which train aerodynamic force and aerodynamic noises are dominantly caused.
Description
Technical field
The present invention relates to a kind of road or railway and use denoising device.
Background technology
Under the prior art condition, make it reach the noise emission standard from source control traffic noise and be difficult to realize that general effective control measures is near the noise source place sound barrier to be set.Existing high speed railway sound barrier generally adopts bigger concrete complex sound barrier of strength and stiffness or board plug type metallic sound barrier.
Consider from acoustic efficiency that merely by the path difference principle of geometric acoustics, sound barrier is high more, its noise reduction is good more.But the too high meeting of sound barrier brings many negative effects: 1. the comfort that reduces the passenger; 2. the daylighting of local-style dwelling houses on every side, the visual field will be a greater impact, and produce psychological sense of depression; 3. along with sound barrier itself highly increases, its wind resistance area increases sharply, and train aerodynamic-force and the influence of ambient wind load are strengthened greatly; 4. along with the increase of sound barrier height, the roadbed basis is strengthened, bridge is quiet, dynamic load increases the weight of, thereby construction costs is increased greatly; 5. of paramount importancely be, receive the influence of bullet train top noise source, the sound barrier height be lower than current collection system height (≤5.3m) time, the height marginal benefit of sound barrier is successively decreased, the engineering price ratio falls sharply.The sound barrier rising structure only plays inhibition to the direct projection noise in the sound barrier altitude range, and is powerless to the diffraction sound of walking around the body of wall top, makes the sound barrier top form the secondary noise source on the contrary, reduced the noise reduction of sound shadow region.
Summary of the invention
Technique effect of the present invention can overcome above-mentioned defective, and the denoising device on a kind of sound barrier top is provided, and can reduce the several pressures of diffraction on sound barrier top greatly, reduces or elimination sound barrier top secondary noise.
For realizing above-mentioned purpose; The present invention adopts following technical scheme: it comprises cylindrical shell; Cylindrical shell comprises horizontal cylinder and vertical cylindrical shell; Horizontal cylinder and vertical cylindrical shell combine to be the inverted L shape or the T type of one, the junction rounding off of horizontal cylinder and vertical cylindrical shell, and horizontal cylinder and vertical cylindrical shell all are provided with absorbent treatment.
The vertical cylindrical shell of cylindrical shell bottom and sound barrier combination are used, and cylindrical shell is arranged on the sound barrier top, can connect through bolt or alternate manner.Cylindrical shell is provided with absorbent treatment towards a side of sound source, and absorbent treatment can the absorption portion high-frequency noise, and is both attractive in appearance, can realize noise reduction again.
Skeleton is set in the horizontal cylinder, and skeleton is divided into two-layer cavity up and down with horizontal cylinder.The upper strata cavity is provided with chamber at interval, and the chamber top is provided with one deck microperforated panel or foamed aluminium board or fiberboard, and the through hole of microperforated panel, foamed aluminium board, fiberboard is very little, can guarantee the entering of noise waves, and stops entering such as rainwater.The degree of depth of each chamber is different, and the degree of depth of chamber is 5-30CM.The degree of depth of each chamber is different, and the frequency of adaptation is different, and the frequency range of noise reduction is different.
Interval between the adjacent chamber is different, and scope is at 5-20CM.Frequency between the 125Hz-4000Hz that chamber design is concentrated the noise acoustic energy ratio is effect targetedly all.China railways traffic noise source spectral characteristic is main with wideband, and noise energy concentrates in certain frequency range.Chamber design as the noise reduction frequency, realizes the noise reduction purpose with this frequency range.
The both sides of top board are arc.Itself has aesthetic denoising device, so need not ornamental strip, has reduced part, and because it adopts the assembly structure of integral type, and whole structure is good, and assembly technology is simple, the trouble point is few; The denoising device main part adopts aluminium alloy element, and surperficial corrosion-resistant treatments, has anti-aging preferably, anti-corrosion, fatigue performance.
The bottom of chamber is provided with drain hole, and the water that gets in the chamber is immediately discharged through drain hole.Vertically a side of cylindrical shell is provided with absorbent treatment, and opposite side is provided with soundproof course, to increase acoustic impedance.
Vertically in the cylindrical shell skeleton is set, inverted L shape or T type that the skeleton that is provided with in skeleton that vertically is provided with in the cylindrical shell and the horizontal cylinder is combined into one, cage construction makes denoising device framework intensity better.
In order to prevent the secondary wind moving noise, denoising device top and inboard appearance design are streamline, level and smooth, and on the parallel direction of train operation, denoising device is installed the back does not have significantly concavo-convex or breach.In the inboard of denoising device from top to bottom, smooth-going, slick and sly, smooth from inside to outside, reduce the frictional resistance of aerodynamic force, pressure drag avoids eddy current to produce.
Sound barrier of the present invention not only has higher acoustical behavior, and can reduce the tangible height of sound barrier, has the top aesthetic; Composite member has good structural strength, good outdoor durable, and high-strength light can be widely used in the sound barrier top that train aerodynamic-force and aerodynamic noise account for leading railway traffic.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done detailed description:
Fig. 1 is embodiments of the invention 1 structural representations;
The structural representation that Fig. 2 combines with sound barrier for the present invention;
Fig. 3 is embodiments of the invention 2 structural representations;
Fig. 4 is embodiments of the invention 3 structural representations.
Among the figure: 1, horizontal cylinder; 2, vertical cylindrical shell; 3, absorbent treatment; 4, chamber; 5, microperforated panel; 6, sound barrier; 7, skeleton; 8, drain hole; 9, soundproof course; 10, foamed aluminium board; 11, fiberboard.
The specific embodiment
Like Fig. 1, shown in Figure 2; This device comprises cylindrical shell, and cylindrical shell is arranged on sound barrier 6 tops, and cylindrical shell comprises horizontal cylinder 1 and vertical cylindrical shell 2; Horizontal cylinder 1 and vertical cylindrical shell 2 combine to be the inverted L shape of one; The long limit of horizontal cylinder 1 is towards the sound source side, the horizontal cylinder 1 and the vertical junction rounding off of cylindrical shell 2, and horizontal cylinder 1 all is provided with absorbent treatment 3 with vertical cylindrical shell 2.
As shown in Figure 3, horizontal cylinder 1 and vertical cylindrical shell 2 combine to be the T type of one.The T type that the skeleton 7 that is provided with in skeleton 7 that vertically is provided with in the cylindrical shell 2 and the horizontal cylinder is combined into one.Horizontal cylinder chamber 4 tops are provided with one deck foamed aluminium board 10.Other is with embodiment 1.
As shown in Figure 4, horizontal cylinder 1 and vertical cylindrical shell 2 combine to be the inverted L shape of one, and the minor face of horizontal cylinder 1 is towards the sound source side, the inverted L shape that the skeleton 7 that is provided with in the skeletons 7 that vertically are provided with in the cylindrical shell 2 and the horizontal cylinder is combined into one.Horizontal cylinder chamber 4 tops are provided with one deck fiberboard 11.Other is with embodiment 1.
Claims (10)
1. the denoising device on a sound barrier top; It is characterized in that; Comprise cylindrical shell, cylindrical shell comprises horizontal cylinder and vertical cylindrical shell, and horizontal cylinder and vertical cylindrical shell combine to be the inverted L shape or the T type of one; The junction rounding off of horizontal cylinder and vertical cylindrical shell, horizontal cylinder all is provided with absorbent treatment with vertical cylindrical shell.
2. the denoising device on sound barrier according to claim 1 top is characterized in that, skeleton is set in the horizontal cylinder, and skeleton is divided into two-layer cavity up and down with horizontal cylinder.
3. the denoising device on sound barrier according to claim 2 top is characterized in that the upper strata cavity is provided with chamber at interval, and the chamber top is provided with one deck microperforated panel or foamed aluminium board or fiberboard.
4. the denoising device on sound barrier according to claim 3 top is characterized in that, the degree of depth of each chamber is different.
5. the denoising device on sound barrier according to claim 4 top is characterized in that, the degree of depth of chamber is 5-30CM.
6. the denoising device on sound barrier according to claim 3 top is characterized in that, interval between the adjacent chamber is different, is spaced apart 5-20CM between the adjacent chamber.
7. the denoising device on sound barrier according to claim 3 top is characterized in that, the both sides of horizontal cylinder are arc.
8. the denoising device on sound barrier according to claim 3 top is characterized in that the bottom of chamber is provided with drain hole.
9. the denoising device on sound barrier according to claim 3 top is characterized in that, vertically a side of cylindrical shell is provided with absorbent treatment, and opposite side is provided with soundproof course.
10. the denoising device on sound barrier according to claim 3 top is characterized in that, vertically in the cylindrical shell skeleton is set, inverted L shape or T type that the skeleton that is provided with in skeleton that vertically is provided with in the cylindrical shell and the horizontal cylinder is combined into one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010595784 CN102418321B (en) | 2010-09-25 | 2010-12-07 | Noise reduction device at top end of sound barrier |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010293729 | 2010-09-25 | ||
| CN201010293729.4 | 2010-09-25 | ||
| CN 201010595784 CN102418321B (en) | 2010-09-25 | 2010-12-07 | Noise reduction device at top end of sound barrier |
Publications (2)
| Publication Number | Publication Date |
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| CN102418321A true CN102418321A (en) | 2012-04-18 |
| CN102418321B CN102418321B (en) | 2013-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010595784 Active CN102418321B (en) | 2010-09-25 | 2010-12-07 | Noise reduction device at top end of sound barrier |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4211049A1 (en) * | 1991-04-02 | 1992-10-22 | Bold Karl Gmbh & Co | Large surface noise prevention barrier - is made up to layers of normal concrete integrated with screened aggregate lean mix layers with corrugated outer face |
| SE511402C2 (en) * | 1997-03-20 | 1999-09-27 | Bcc Ab | Railing |
| CN201221057Y (en) * | 2008-06-04 | 2009-04-15 | 中国建筑材料科学研究总院 | Noise absorption apparatus on top of acoustical barrier |
| CN201560403U (en) * | 2009-10-26 | 2010-08-25 | 上海众汇泡沫铝材有限公司 | Cylindrical sound barrier with window |
| CN201865061U (en) * | 2010-09-25 | 2011-06-15 | 朴太善 | Noise reduction device on top end of noise barrier |
-
2010
- 2010-12-07 CN CN 201010595784 patent/CN102418321B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4211049A1 (en) * | 1991-04-02 | 1992-10-22 | Bold Karl Gmbh & Co | Large surface noise prevention barrier - is made up to layers of normal concrete integrated with screened aggregate lean mix layers with corrugated outer face |
| SE511402C2 (en) * | 1997-03-20 | 1999-09-27 | Bcc Ab | Railing |
| CN201221057Y (en) * | 2008-06-04 | 2009-04-15 | 中国建筑材料科学研究总院 | Noise absorption apparatus on top of acoustical barrier |
| CN201560403U (en) * | 2009-10-26 | 2010-08-25 | 上海众汇泡沫铝材有限公司 | Cylindrical sound barrier with window |
| CN201865061U (en) * | 2010-09-25 | 2011-06-15 | 朴太善 | Noise reduction device on top end of noise barrier |
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| CN102418321B (en) | 2013-08-14 |
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