CN201865061U - Noise reduction device on top end of noise barrier - Google Patents
Noise reduction device on top end of noise barrier Download PDFInfo
- Publication number
- CN201865061U CN201865061U CN2010206674185U CN201020667418U CN201865061U CN 201865061 U CN201865061 U CN 201865061U CN 2010206674185 U CN2010206674185 U CN 2010206674185U CN 201020667418 U CN201020667418 U CN 201020667418U CN 201865061 U CN201865061 U CN 201865061U
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- China
- Prior art keywords
- cylindrical shell
- sound barrier
- horizontal cylinder
- denoising device
- chamber
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- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The utility model relates to a noise reduction device used on roads or railways. The noise reduction device on the top end of a noise barrier comprises a barrel, wherein the barrel comprises a horizontal barrel and a vertical barrel which are combined to be integral inverted L-shaped or T-shaped; the joint parts between the horizontal barrel and the vertical barrel are in smooth transition; and the horizontal barrel and the vertical barrel are provided with sound absorption layers. The noise barrier not only has high acoustical property, but also can reduce the tangible height thereof, and has good top end aesthetics; the assembly has excellent structural strength and good outdoor durability, is light in mass and high in strength, and can be widely applied to the top end of the noise barrier of railroad transportation with the train aerodynamic force and aerodynamic noise in the lead.
Description
Technical field
The utility model relates to a kind of road or railway 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, 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, be subjected to 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.
The utility model content
Technique effect of the present utility model 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 achieving the above object, the utility model adopts following technical scheme: it comprises cylindrical shell, cylindrical shell comprises horizontal cylinder and vertical cylindrical shell, horizontal cylinder and vertical cylindrical shell are in conjunction with the inverted L shape or the T type that are one, the junction rounding off of horizontal cylinder and vertical cylindrical shell, horizontal cylinder all is provided with absorbent treatment with vertical cylindrical shell.
The vertical cylindrical shell and the sound barrier of cylindrical shell bottom are used in combination, and cylindrical shell is arranged on the sound barrier top, can connect by 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 entering of noise waves, and stops that rainwater etc. enters.The degree of depth difference of each chamber, the degree of depth of chamber are 5-30CM.The degree of depth difference of each chamber, the frequency difference of adaptation, the frequency range difference of noise reduction.
Interval difference between the adjacent chamber, 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 based on 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 enters in the chamber is immediately discharged by 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 is provided with in the vertical cylindrical shell and the horizontal cylinder is combined into one, cage construction makes denoising device framework intensity better.
In order to prevent the pneumatic noise of secondary, 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 utility model 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 drawings and specific embodiments the utility model is done detailed description:
Fig. 1 is embodiment 1 structural representation of the present utility model;
Fig. 2 is the structural representation that the utility model combines with sound barrier;
Fig. 3 is embodiment 2 structural representations of the present utility model;
Fig. 4 is embodiment 3 structural representations of the present utility model.
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
As shown in Figure 1 and Figure 2, this device comprises cylindrical shell, cylindrical shell is arranged on sound barrier 6 tops, cylindrical shell comprises horizontal cylinder 1 and vertical cylindrical shell 2, horizontal cylinder 1 and vertical cylindrical shell 2 are in conjunction with the inverted L shape that is 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 are in conjunction with the T type that is one.The T type that the skeleton 7 of setting is combined into one in skeletons 7 that are provided with in the vertical cylindrical shell 2 and the horizontal cylinder.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 vertically cylindrical shell 2 is in conjunction with the inverted L shape that is one, the minor face of horizontal cylinder 1 is towards the sound source side, vertically the inverted L shape that is combined into one of the skeleton 7 that is provided with in the skeletons 7 that are provided with in the cylindrical shell 2 and the horizontal cylinder.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, horizontal cylinder and vertical cylindrical shell are in conjunction with the inverted L shape or the T type that are 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 difference of each chamber.
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, the interval difference between the adjacent chamber 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, vertically inverted L shape or the T type that the interior skeleton that is provided with of the skeleton of setting and horizontal cylinder is combined into one in the cylindrical shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206674185U CN201865061U (en) | 2010-09-25 | 2010-12-07 | Noise reduction device on top end of noise barrier |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020544431.1 | 2010-09-25 | ||
| CN201020544431 | 2010-09-25 | ||
| CN2010206674185U CN201865061U (en) | 2010-09-25 | 2010-12-07 | Noise reduction device on top end of noise barrier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201865061U true CN201865061U (en) | 2011-06-15 |
Family
ID=44136221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206674185U Expired - Lifetime CN201865061U (en) | 2010-09-25 | 2010-12-07 | Noise reduction device on top end of noise barrier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201865061U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102418321A (en) * | 2010-09-25 | 2012-04-18 | 朴太善 | Noise reduction device at top end of sound barrier |
| CN108396668A (en) * | 2018-03-23 | 2018-08-14 | 上海交通大学 | Denoising structure at the top of the anti-diffraction sound barrier of low frequency |
-
2010
- 2010-12-07 CN CN2010206674185U patent/CN201865061U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102418321A (en) * | 2010-09-25 | 2012-04-18 | 朴太善 | Noise reduction device at top end of sound barrier |
| CN108396668A (en) * | 2018-03-23 | 2018-08-14 | 上海交通大学 | Denoising structure at the top of the anti-diffraction sound barrier of low frequency |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110615 Effective date of abandoning: 20130814 |
|
| RGAV | Abandon patent right to avoid regrant |