CN2454408Y

CN2454408Y - Noise silencing barrier

Info

Publication number: CN2454408Y
Application number: CN 00240361
Authority: CN
Inventors: 李鹏; 陈卫平; 何彤锋
Original assignee: MEILI LANDSCAPE BUILDING-PLANNING DESIGN OFFICE GUANGZHOU
Current assignee: MEILI LANDSCAPE BUILDING-PLANNING DESIGN OFFICE GUANGZHOU
Priority date: 2000-12-04
Filing date: 2000-12-04
Publication date: 2001-10-17
Anticipated expiration: 2010-12-04

Abstract

The utility model discloses a noise silencing barrier which is composed of a surface permeable layer, a sound-absorbing layer and a bottom layer, wherein, the surface permeable layer is manufactured by cutting light plates; the permeable forms of the surface permeable layer can be a honeycomb type, a louvered type and a geometric punch form of other forms; the sound-absorbing layer is composed of sound-absorbing mineral wool; the sound-absorbing layer is fixed on a steel wire net parallel to the surface permeable layer, and is separated a definite distance from the surface permeable layer; the bottom layer is made of the light plates, and is arranged behind the sound-absorbing layer. The utility model has the advantages of strong noise absorbing ability, wide range of sound-absorbing frequency, simple processing technology and rich material source.

Description

A kind of noise is eliminated the noise and is hindered

The utility model relates to a kind of noise silencing apparatus, particularly relates to a kind of baffle that road noise pollutes that is used to eliminate.

Along with the high speed development of Chinese Urbanization, urban road area and motor vehicle quantity sharply increase, and noise pollution is more and more serious.Especially in the metropolis, because the various reasons of urban traffic pressure and urban construction, emerge in large numbers like the mushrooms after rain the viaduct, shuttle back and forth between intensive building in these viaducts, bring great noise for the daily life and the work of living in these buildings, seriously influenced people's physical and mental health.This just need be to the viaduct processing of insulating against sound, and existing means are in the both sides, viaduct sound-proof wall to be set.From present situation, the effect of present sound-proof wall is not fully up to expectations, and main cause is that the sound shadow zone that forms of the sound-proof wall of these individual layers is limited, only only limits to a pocket in wall dead astern.And those floors that are positioned at more than the wall body are not in the sound shadow region; Simultaneously,, therefore can reflect noise to those and be positioned at floor more than the wall body, and the sound field stack also takes place in direct sound and reflected sound in the all-bottom sound scope, strengthen the intensity of noise because the surface of present sound-proof wall is the reflecting surface of rigidity.

The purpose of this utility model is that solution has the deficiency of sound-proof wall now and a kind of noise elimination barrier that can effectively eliminate the road noise pollution is provided.

For reaching above-mentioned purpose, the noise that the utility model provides is eliminated the noise and is hindered, its top curved camber, and the middle part is for directly tabular, and the bottom is fixed on the guardrail of road both sides.The barrier of eliminating the noise is made up of the saturating dead level in surface, absorbent treatment and bottom, the saturating dead level in described surface is cut into by lightweight plate, its saturating empty form has the geometry punch format of honeycomb fashion, louvered and other form: described absorbent treatment is made up of the sound absorption mineral wool, this layer is fixed on the gauze wire cloth parallel with the saturating dead level in surface, and separate certain distance with the saturating dead level in surface, form resonant cavity; Described bottom is made by lightweight plate, and it is arranged on after the absorbent treatment.

Primer described in the utility model, if the big material of rigidity, as steel sheet, because of these materials limited in the displacement of normal direction, therefore can't lean on the material deformation of self to offset the partial noise sound wave, at this moment just need between primer and sound absorption mineral wool, separate certain distance, an air layer is set.When the sound absorption mineral wool was subjected to the impact of noise sound wave, by the micropore absorption of noise sound wave of itself, the mineral wool itself that absorbs sound on the other hand also vibrated under the impact of noise sound wave on the one hand for it.When sound absorption mineral wool when vibration, it will compress the air between it and the primer, thereby the acoustic energy of noise sound wave is converted into the heat energy of air, reaches the effect of counteracting sound wave.If the primer little material that is rigidity, as plastic plate, certain displacement can take place in these materials on normal direction, can come by the material deformation of itself the heat energy of the acoustic energy of partial noise sound wave conversion self, so just need between primer and sound absorption mineral wool, not leave air layer, thereby the minimizing thickness of structure, economical with materials.

Noise elimination barrier described in the utility model bottom is provided with a damping component with the bearing of road guard, and damping component can adopt rubber layer.On the one hand it can to reduce road transaudient with the vibration of eliminating the noise between hindering, it allows eliminate the noise to hinder and can wave distortion within the specific limits after being subjected to sonic impinging on the other hand, so just can offset a part of noise sound wave, the connection of rigidity does not then have the partial offset effect to noise.

Main action principle of the present utility model is: sound absorber is made by the form of wearing micropore or blinds in the surface, and non-reflecting surface, it is inner that so most sound just can enter the barrier of eliminating the noise by the gap of surface micropore or blinds, and then by the sound absorption mineral wool and the resonating cativty acting in conjunction of inside sound is absorbed fully.

The utlity model has outstanding advantage: the ability of (1) absorption of noise is strong, and the sound absorption frequency range is wide, and is especially better to the maximum medium and low frequency noise assimilation effect of harm in the motor vehicle noise; (2) processing technology is simple, and material source is abundant, and is cheap, and the while is taken into account attractive in appearance again, is well suited for large-scale promotion and application.

Below in conjunction with drawings and Examples the utility model is further described.

Fig. 1 is user mode figure of the present utility model:

Fig. 2 is along the sectional drawing of A-A line among Fig. 1;

Fig. 3 is the enlarged drawing of node one among Fig. 2;

Fig. 4 is the enlarged drawing of node two among Fig. 2.

As shown in the figure, the utility model noise is eliminated the noise and is hindered, and its top 1 bends to arc, and middle part 2 is for directly tabular, and bottom 3 is fixed on the guardrail 4 of road both sides, and bottom 3 is provided with a rubber layer damping component 12 with the bearing of road guard 4 again.The barrier of eliminating the noise is made up of the saturating dead level 5 in surface, absorbent treatment 6 and bottom 7.

The saturating dead level 5 in surface is cut into by the lightweight plate aluminium sheet, and the saturating empty form of the saturating dead level top curved part in surface adopts honeycomb fashion, so that processing; The saturating empty form at middle part adopts louvered, to play the effect of anti-rainwater.

Absorbent treatment 6 is made up of the sound absorption mineral wool, this layer is fixed on the gauze wire cloth 8 parallel with the saturating dead level in surface, gauze wire cloth 8 adopts the large-mesh gauze wire cloth, its sound absorbent surface that can increase mineral wool on the one hand is long-pending, can make the sound absorption mineral wool that certain displacement takes place on normal direction on the other hand, to relax the impact of noise sound wave, absorbent treatment 6 separates certain distance with the saturating dead level 5 in surface, to form resonant cavity 9.

Bottom 7 is made by lightweight plate, and wherein top curved partly adopts plastic plate, and plastic plate is close to after the absorbent treatment 6; The middle part straight plate part divides the employing aluminium sheet, and aluminium sheet separates certain distance with absorbent treatment 6, forms resonant cavity 11.

Claims

1, a kind of noise is eliminated the noise and is hindered, its top (1) bends to arc, middle part (2) is for directly tabular, bottom (3) is fixed on the guardrail (4) of road both sides, it is characterized in that: it is made up of the saturating dead level in surface (5), absorbent treatment (6) and bottom (7), the saturating dead level in described surface (5) is cut into by lightweight plate, and its saturating empty form is any how much punch formats; Described absorbent treatment (6) is made up of the sound absorption mineral wool, and this layer is fixed on the gauze wire cloth (8) parallel with the saturating dead level in surface, and separates certain distance with the saturating dead level in surface (5), forms resonant cavity (9); Described bottom (10) is made by lightweight plate, and it is arranged on absorbent treatment (6) afterwards.

2, noise as claimed in claim 1 is eliminated the noise and hindered, and it is characterized in that: the saturating empty form of the saturating dead level in described surface (5) top curved part adopts honeycomb fashion; The saturating empty form that the middle part straight plate part divides adopts louvered.

3, noise as claimed in claim 1 is eliminated the noise and hindered, and it is characterized in that: described bottom (7) adopts the little material of rigidity, and bottom (7) and absorbent treatment (6) are close together.

4, noise as claimed in claim 1 is eliminated the noise and hindered, and it is characterized in that: described bottom (7) adopts the big material of rigidity, and bottom (7) separates certain distance with absorbent treatment (6), forms resonant cavity (11).

5, noise as claimed in claim 1 is eliminated the noise and hindered, and it is characterized in that: described noise elimination barrier bottom (3) is provided with a damping component (12) with the bearing of road guard (4).

6, noise as claimed in claim 5 is eliminated the noise and is hindered, and it is characterized in that: described damping component (12) is a rubber layer.