CN204385639U - A kind of foamed aluminium sound-absorbing muffler being arranged on sound barrier top and using - Google Patents
A kind of foamed aluminium sound-absorbing muffler being arranged on sound barrier top and using Download PDFInfo
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- CN204385639U CN204385639U CN201420822640.6U CN201420822640U CN204385639U CN 204385639 U CN204385639 U CN 204385639U CN 201420822640 U CN201420822640 U CN 201420822640U CN 204385639 U CN204385639 U CN 204385639U
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Abstract
The utility model discloses a kind of foamed aluminium sound-absorbing muffler being arranged on sound barrier top and using, described sound barrier has body, described foamed aluminium sound-absorbing muffler is arc-shaped structure, and comprise Foamed aluminum sound absorbing plate, arc punched-plate and arc-shaped cavity from outside to inside successively, described Foamed aluminum sound absorbing plate has been covered with cavity, and the width of described foamed aluminium sound-absorbing muffler is greater than the width of described body.Acoustical cotton is provided with in described arc-shaped cavity.The beneficial effects of the utility model: upper-end part of driving foamed aluminium sound-absorbing muffler being arranged on sound barrier, vehicle travels the noise occurred, undertaken absorbing sound and noise reduction by the cavity of Foamed aluminum sound absorbing plate and arc-shaped cavity, under not needing the too high condition that the height of noise barrier is arranged, just can reach the effect of solving road noise problem.And use fixture to be directly installed on sound barrier top by lower end installed surface, construct more convenient, structure is simple, and cost is also low.
Description
Technical field
The utility model relates to silencing means, is specifically related to a kind of foamed aluminium sound-absorbing muffler being arranged on sound barrier top and using.
Background technology
Along with increasing sharply of social automobile pollution, modern city has built a large amount of elevated road and speedway one after another, also bring a large amount of noise pollution simultaneously, the requirement of people to living environment is also more and more higher simultaneously, sound barrier obtains increasing application, has the road of residential block also all to need to arrange sound barrier in both sides for side.And common sound barrier uses glass usually, asbestos etc. are as damping material, and this type of sound barrier sound absorption erasure effect is poor, and in natural environment, wind and weather easily lost efficacy, and the life-span is shorter, not recoverable, easily caused secondary pollution.
The technical research of current noise damper is also a lot, such as application number is that the Chinese patent of 201320681784.X discloses a kind of environment friendly silencer: comprise shell, several foamed aluminiums sound absorption cylindrical shell is set in described shell, described foamed aluminium sound absorption cylindrical shell is matrix arrangement, the wall thickness of described foamed aluminium sound absorption cylindrical shell is 8mm, and described outer casing thickness is 10cm.The utility model advantage is compared with prior art: structure environmental protection of the present utility model can not cause secondary pollution, while raising noise source sound-damping qualities, reduces the length of noise damper, makes noise damper outward appearance small and exquisite, save material.
Consider from acoustic efficiency merely, by the path difference principle of geometric acoustics, sound barrier is higher, and its noise reduction is better.But the too high meeting of sound barrier brings many negative effects: 1. along with sound barrier itself highly increases, its wind resistance area increases sharply, and train aerodynamic-force and environment Wind effects are strengthened greatly; 2., along with the increase of sound barrier height, foundation of road bed strengthens, bridge static and dynamic loadings increases the weight of, thus construction costs is increased greatly.
Utility model content
The purpose of this utility model is to make up the deficiencies in the prior art, provide a kind of rational in infrastructure, can better solving road noise problem be arranged on sound barrier top use foamed aluminium sound-absorbing muffler.
In order to reach the purpose of this utility model, technical scheme is as follows:
A kind of foamed aluminium sound-absorbing muffler being arranged on sound barrier top and using, described sound barrier has body, described foamed aluminium sound-absorbing muffler is arc-shaped structure, and comprise Foamed aluminum sound absorbing plate, arc punched-plate and arc-shaped cavity from outside to inside successively, described Foamed aluminum sound absorbing plate has been covered with cavity, and the width of described foamed aluminium sound-absorbing muffler is greater than the width of described body.
As preferred technical scheme: the both sides of described body are provided with the first installed surface and the second installed surface, the two ends of described foamed aluminium sound-absorbing muffler are connected with described first installed surface and described second installed surface respectively.
As preferred technical scheme: the thickness of described arc punched-plate is 1 ~ 5mm, the thickness of described Foamed aluminum sound absorbing plate is 5 ~ 30mm.
As preferred technical scheme: the radius of described arc punched-plate is 100 ~ 600mm.
As preferred technical scheme: also comprise the fixture described first installed surface and described second installed surface fixed on the body.
As preferred technical scheme: be provided with acoustical cotton in described arc-shaped cavity.
Outermost Foamed aluminum sound absorbing plate, be placed on rabble furnace by molten metal aluminium and drop into binding agent to carry out thickening stirring, then adding blowing agent according to demand makes the inner bubble that formed manufacture foamed aluminium, after manufacturing foamed aluminium, it is cut into sheet material as required, foam aluminium plate is suppressed, forms the Foamed aluminum sound absorbing plate with partial through holes and cavity.
At present, foam aluminium plate is widely used in every field, and especially foamed aluminium board has fire prevention, sound insulation, sound absorption, water-tolerant, and belonging to simple metal goods can the feature such as 100% recycling.
Vehicle travels the noise that sends through foamed aluminium sound-absorbing muffler, and first absorbed a part by the Foamed aluminum sound absorbing plate near sound source side, the cavity on Foamed aluminum sound absorbing plate can absorb noise and once decay by noise; Noise through overdamping carries out secondary noise reduction through entering in arc-shaped cavity after arc punched-plate, and the attraction cotton in arc-shaped cavity itself can play certain sucking action; And noise can be reflected after encountering the wall (i.e. the inwall of arc punched-plate) of arc-shaped cavity, but the wall due to arc-shaped cavity is the shape of a near circular, still got back in arc-shaped cavity by the noise after reflecting, so noise is decayed gradually repeatedly, or absorbed by acoustical cotton, small part noise can pass from away from the arc punched-plate of sound source side and Foamed aluminum sound absorbing plate, but noise now through repeatedly sound-absorbing decay is very faint.
The optimal values scope of the radius of the thickness of arc punched-plate, the thickness of Foamed aluminum sound absorbing plate and arc punched-plate obtains according to test, these numerical value are larger, the effect of noise reduction is certainly better, the decibel of road both sides noise is also lower, but installation, maintenance and material cost are also higher, and practicality reduces.So, by controlling the thickness of arc punched-plate, the thickness of Foamed aluminum sound absorbing plate and the radius of arc punched-plate, allow the noise of road both sides (people is acceptable scope in bed) below 30 decibels, while ensureing erasure effect, also accomplish minimization of cost.
In addition, cross section is the foamed aluminium sound-absorbing muffler of arc-shaped structure, compares square structure, when the sound source being positioned at lower part disperses noise to surrounding, can stop wider noise, play better erasure effect; And, noise can be made successively to carry out noise reduction through Foamed aluminum sound absorbing plate twice, further increase erasure effect.
The beneficial effect that the utility model has:
Foamed aluminium sound-absorbing muffler is arranged on the upper-end part of driving of sound barrier, vehicle travels the noise occurred, undertaken absorbing sound and noise reduction by the cavity of Foamed aluminum sound absorbing plate and arc-shaped cavity, under not needing the too high condition that the height of noise barrier is arranged, just can reach the effect of solving road noise problem.And use fixture to be directly installed on sound barrier top by lower end installed surface, construct more convenient, structure is simple, and cost is also low.
Accompanying drawing explanation
Fig. 1 is the structural representation that the utility model is arranged on the foamed aluminium sound-absorbing muffler that sound barrier top uses;
Fig. 2 is the cross section structure schematic diagram of Fig. 1.
Detailed description of the invention
Below in conjunction with embodiment, the utility model is further described, but protection domain of the present utility model is not only confined to embodiment.
Shown in composition graphs 1 and Fig. 2, a kind of foamed aluminium sound-absorbing muffler being arranged on sound barrier top and using, sound barrier has body 300.Foamed aluminium sound-absorbing muffler 180 is arc-shaped structure, and comprise Foamed aluminum sound absorbing plate 200, arc punched-plate 100 and arc-shaped cavity from outside to inside successively, Foamed aluminum sound absorbing plate 200 is covered with cavity 210, the width of foamed aluminium sound-absorbing muffler 180 is greater than the width of body 300, therefore the whole shape looking somewhat similar mushroom.
The both sides of body 300 are provided with the first installed surface 120 and the second installed surface 140, the two ends of foamed aluminium sound-absorbing muffler are connected with the first installed surface 120 and the second installed surface 140 respectively, and the first installed surface 120 and the second installed surface 140 are arranged on body 300 by fixture 160.
The thickness of arc punched-plate 100 is 1 ~ 5mm, and the thickness of Foamed aluminum sound absorbing plate 200 is 5 ~ 30mm, preferably 9 ~ 10mm.The radius R of arc punched-plate 100 is 100 ~ 600mm.
Be provided with acoustical cotton in arc-shaped cavity, also play sound absorption.
Vehicle travels the noise that sends when through foamed aluminium sound-absorbing muffler 180, and first absorbed a part by the Foamed aluminum sound absorbing plate 200 near sound source side, the cavity 210 on Foamed aluminum sound absorbing plate 200 can absorb noise and carry out attenuation of the first kind by noise, noise through overdamping carries out secondary noise reduction through entering in arc-shaped cavity after arc punched-plate 100, and the attraction cotton in arc-shaped cavity itself can play certain sucking action, and noise can be reflected after encountering the wall (i.e. the inwall of arc punched-plate 100) of arc-shaped cavity, but the wall due to arc-shaped cavity is the shape of a near circular, still got back in arc-shaped cavity by the noise after reflecting, so noise is decayed gradually repeatedly, or absorbed by acoustical cotton, small part noise can pass through away from the arc punched-plate 100 of sound source side and Foamed aluminum sound absorbing plate 200, be equivalent to the absorption that noise experienced by twice Foamed aluminum sound absorbing plate 200, noise now through repeatedly sound-absorbing decay is very faint, less than 30 decibels can be dropped to, the ortho of people can not be had influence on.
Claims (6)
1. the foamed aluminium sound-absorbing muffler being arranged on sound barrier top and using, described sound barrier has body (300), it is characterized in that: described foamed aluminium sound-absorbing muffler (180) is arc-shaped structure, and comprise Foamed aluminum sound absorbing plate (200), arc punched-plate (100) and arc-shaped cavity from outside to inside successively, described Foamed aluminum sound absorbing plate (200) has been covered with cavity (210), the width of described foamed aluminium sound-absorbing muffler (180) is greater than the width of described body (300).
2. the foamed aluminium sound-absorbing muffler being arranged on sound barrier top and using according to claim 1, it is characterized in that: the both sides of described body (300) are provided with the first installed surface (120) and the second installed surface (140), the two ends of described foamed aluminium sound-absorbing muffler are connected with described first installed surface (120) and described second installed surface (140) respectively.
3. the foamed aluminium sound-absorbing muffler being arranged on sound barrier top and using according to claim 1, it is characterized in that: the thickness of described arc punched-plate (100) is 1 ~ 5mm, the thickness of described Foamed aluminum sound absorbing plate (200) is 5 ~ 30mm.
4. the foamed aluminium sound-absorbing muffler being arranged on sound barrier top and using according to claim 1, is characterized in that: the radius of described arc punched-plate (100) is 100 ~ 600mm.
5. the foamed aluminium sound-absorbing muffler being arranged on sound barrier top and using according to claim 2, is characterized in that: also comprise the fixture (160) described first installed surface (120) and described second installed surface (140) are fixed on described body (300).
6. the foamed aluminium sound-absorbing muffler being arranged on sound barrier top and using according to claim 1, is characterized in that: be provided with acoustical cotton in described arc-shaped cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420822640.6U CN204385639U (en) | 2014-12-23 | 2014-12-23 | A kind of foamed aluminium sound-absorbing muffler being arranged on sound barrier top and using |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420822640.6U CN204385639U (en) | 2014-12-23 | 2014-12-23 | A kind of foamed aluminium sound-absorbing muffler being arranged on sound barrier top and using |
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| CN204385639U true CN204385639U (en) | 2015-06-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108708312A (en) * | 2018-05-23 | 2018-10-26 | 江苏金阳交通工程有限公司 | A kind of adjustable sound barrier |
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2014
- 2014-12-23 CN CN201420822640.6U patent/CN204385639U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108708312A (en) * | 2018-05-23 | 2018-10-26 | 江苏金阳交通工程有限公司 | A kind of adjustable sound barrier |
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