CN201222350Y

CN201222350Y - Acoustical barrier

Info

Publication number: CN201222350Y
Application number: CNU2008201091629U
Authority: CN
Inventors: 颜建国
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-07-11
Filing date: 2008-07-11
Publication date: 2009-04-15
Anticipated expiration: 2018-07-11

Abstract

The utility model relates to a sound barrier, which is provided with a panel and a back board. A sound absorber is arranged between the panel and the back board, and the end portions of the panel and the back board are sealed by a sealing strip, wherein the sound absorber is separated from the panel and the back board in space, and both sides of the sound absorber form cavity layers with the panel and the back boards. Since sound absorbing layers are arranged in the panel and the back boards by the sound barrier to form a sound insulation barrier whose front and rear are hollow, and therefore, the intensity of the sound barrier is obviously improved. Compared with a widely-known sound barrier, the sound barrier reduces the usage of perforated sound-absorbing material, and compared with a sound barrier with the same thickness, the sound barrier saves two thirds sound-absorbing materials, and improves the sound-proof effect of the sound barrier.

Description

Sound barrier

Technical Field

The utility model relates to a sound barrier, especially the sound absorber that sets up in panel and the backplate comprises the material of two kinds of different properties, and has the sound barrier on cavity layer between sound absorber and panel and the backplate.

Background

An acoustic barrier is a shielding system for isolating the propagation of direct sound from a noise source, which is placed between the noise source and the receiver, and which allows the receiver to be placed in the sound shadow region with a good isolation of the noise propagation therein. There are many traffic noise pollution control measures for railway, light rail and road, but the noise barrier has small occupied area, convenient and fast manufacture and installation and proper engineering investment, and becomes an important measure for traffic noise pollution control.

In the process of sound wave propagation, when meeting the sound barrier, three phenomena of reflection, transmission and diffraction can occur. It is generally believed that the barrier prevents the propagation of direct sound and provides sufficient attenuation of the total radiated sound with negligible effect of the transmitted sound. Therefore, the sound insulation effect of a sound barrier can be generally expressed by a noise reduction amount, which reflects the above-mentioned two shielding and sound transmission capabilities of the sound barrier. An acoustic barrier is inserted between the source and the receiver, the barrier being of infinite length so that sound waves can only diffract over the barrier to form an acoustic shadow zone behind it, as if the light were blocked by an object to form a shadow. In this shadow region, one may perceive that the noise is significantly reduced, which is the noise reduction effect of the sound barrier.

The insertion of a facility between the source and the receiver, called a sound barrier, which provides a significant additional attenuation of the sound wave propagation and thus reduces the noise contribution in the area where the receiver is located. The sound barrier is widely applied in all countries in the world, for example, many researches are carried out in all countries in the aspect of traffic noise prevention, sound barrier technologies are researched in the 20 th century and the 60 th century of some developed countries, and deep researches and a large amount of practices are carried out in the aspects of design and construction of the sound barrier in the 70 th and the 80 th ages.

The currently known sound barrier structure forms are mainly as follows:

1. perforated plate type:

a perforated plate is used as a supporting body, and sound absorption materials (such as rock wool and the like) are filled in the perforated plate, which is one of the most widely used sound barriers. Fig. 1 is a schematic diagram of a known sound barrier structure. The panel 10 of the sound barrier 1 facing the noise source is a perforated plate, the inner cavity is completely filled with sound-absorbing materials 11 (such as rock wool, centrifugal glass wool, fiber board, etc.), and the back plate 12 on the side far away from the noise source is a perforated plate identical to the panel 10, or a metal plate with certain strength is adopted. The ends of the face plate 10 and back plate 12 are sealed by sealing strips 13. When in use, a plurality of same sound barriers 1 are arranged in a convex-concave buckling and overlapping mode to form the barrier.

In addition, chinese patent No. 03206897, "a sound absorbing barrier panel", is also a perforated panel type sound barrier.

2. A louver type:

the shutter slot is used as a bearing body, and sound absorption materials (such as rock wool and the like) are filled in the shutter slot, so that the shutter slot is one of the most widely applied sound barriers. One side of the hollow cavity facing the noise source is a shutter slot, and the inner hollow cavity is completely filled with sound absorption materials (such as rock wool, centrifugal glass wool, fiber boards and the like).

3. Chinese patent No. 00263317, "folded plate type composite sound absorption barrier" discloses a sound absorption barrier composed of a lower frame and an upper shell, wherein the lower frame is filled with foam glass, the front of the upper shell is a micro-perforated plate, and the micro-perforated plate and the upper shell at the back of the upper shell form a cavity.

The filling type sound barrier adopts different opening forms, sound absorption materials are filled in the filling type sound barrier, and the sound barrier has certain thickness to achieve sufficient sound absorption and sound insulation effects, generally about 100-200 mm. However, the known sound barrier structures all suffer from common drawbacks: a large amount of sound absorption materials must be filled, and meanwhile, the sound absorption materials are light in weight and poor in sound insulation effect, so that the overall sound insulation effect of the sound barrier is not ideal. The lower part of the folded plate type composite sound absorption barrier disclosed in the chinese patent No. 00263317 is a filled type sound barrier, and the upper part thereof is a hollow cavity, so the lower part thereof also has the above-mentioned defects, while the upper part thereof is only a hollow cavity, and the sound insulation effect thereof is worse than that of the lower part.

In addition, known sound barrier structures are:

1. transparent type: the sound insulation wall is made of organic glass and is highly transparent.

2. Concrete type:

a weather-resistant sound-absorbing board of the concrete sound-absorbing series unit is a sound-absorbing material which is made up of flint clay aggregate with specific grain size and high-quality clay as main components, whitening enamel slurry and water through stirring and shaping. Because the sound absorption coefficient is low, the sound absorption of the concrete is low, the reflected sound is large, and the sound insulation effect is general.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: the sound barrier is provided to overcome the defects of the prior art, improve the sound insulation quantity, reduce the using amount of sound absorption materials and save the manufacturing cost.

Therefore, the utility model provides a sound barrier has panel and backplate, be equipped with the sound absorber between panel and the backplate, the tip of panel and backplate is sealed by the sealing strip, wherein, separate the interval setting between sound absorber and panel, the backplate, form the cavity layer between the both sides of sound absorber and panel and the backplate.

The sound barrier as described above, wherein the sound absorber is composed of a sound absorbing layer and a sound insulating layer.

The sound barrier as described above, wherein the sound absorption layer is a rock wool board, and the sound insulation layer is a fiber cement board or a metal board.

The sound barrier as described above, wherein the sound absorption layer is fixedly connected to the sound insulation layer by bolts.

The sound barrier as described above, wherein fixing plates are provided between both sides of the sound absorber and the face plate and the back plate.

The sound barrier as described above, wherein the fixing plate includes an upper fixing plate and a lower fixing plate, and both the upper fixing plate and the lower fixing plate are in a shape of Chinese character 'ao' with unsealed bottoms; the inner grooves in the middle of the upper fixing plate and the lower fixing plate are clamped at the top and the bottom of the sound absorber respectively, and the vertical walls at two sides of the sound absorber abut against the inner side walls of the panel and the back plate.

The sound barrier as described above, wherein the upper and lower fixing plates are respectively fixed at the top and bottom four corners of the sound absorber in a snap-fit manner.

The sound barrier as described above, wherein the depth of the inner groove of the upper fixing plate is greater than the depth of the inner groove of the lower fixing plate; and the length of the vertical walls on the two sides of the upper fixing plate is smaller than the depth of the inner groove of the upper fixing plate, and the length of the vertical walls on the two sides of the lower fixing plate is larger than the depth of the inner groove of the lower fixing plate.

The sound barrier as described above, wherein at least said panel is a perforated panel with sound absorbing holes.

The sound barrier as described above, wherein said face plate and back plate are metal plates.

The utility model discloses a sound barrier, the inside acoustic absorber that is provided with the acoustic material of two kinds of different properties and constitutes, and have the cavity layer between acoustic absorber and panel and the backplate, because the noise is a sound wave, all have the reflection failure phenomenon when the medium through the difference, adopt the different medium of multilayer to reduce the identical effect of material simultaneously, improve the noise sound insulation sound absorption effect of sound barrier to different frequencies and be very meaningful.

Compared with the known technology, the utility model has the characteristics and advantages that:

1. the utility model discloses a sound barrier of structure well-known structure has reduced porous sound absorbing material's quantity, compares with the sound barrier of same thickness, practices thrift 2/3's sound absorbing material.

2. The utility model discloses a structure, the fiber cement board that sets up in the middle of panel and backplate has improved the sound insulation volume of sound barrier, detects in the laboratory, and the sound insulation volume of hollow sound insulation barrier reaches 50 decibels around adopting 140mm, and the sound insulation volume of the sound insulation barrier (140mm thickness) that adopts the inside whole sound absorbing material of filling of perforated plate is 40 decibels, is showing the sound insulation volume that improves the sound barrier.

3. Adopt the utility model discloses a sound barrier, the cement fiberboard in the middle can improve the intensity of sound barrier, makes the utility model discloses can not only be used for low-speed vehicles's such as highway, railway, light rail travel route both sides, improve the sound insulation effect, when the air current that produces when wind-load or quick vehicle pass through strikes the sound barrier moreover, the utility model discloses can effectively resist the wind-load, reduce and warp, improve stability, so hollow sound barrier can also use on the high-speed track traffic around the adoption.

The utility model discloses a sound barrier has solved the inside whole sound absorption materials that fill of ordinary sound barrier, and the sound absorbing material quantity is many, the not good shortcoming of sound insulation effect simultaneously, and material saving cost has better sound insulation effect simultaneously again.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein,

FIG. 1 is a schematic diagram of a conventional sound barrier structure;

fig. 2 is a schematic view of a sound barrier structure according to the present invention;

fig. 3 is a schematic structural view of an upper fixing plate of the present invention;

fig. 4 is a schematic structural view of the lower fixing plate of the present invention.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in fig. 2, the sound barrier 2 of the present invention adopts a front and a rear hollow sound-proof barriers, and two different acoustic materials are used inside the sound barrier for processing, and only a known perforated plate is used as a supporting body (outer shell). The method comprises the following steps: the sound barrier 2 is provided with a panel 20 and a back plate 21, a sound absorber 22 is arranged between the panel 20 and the back plate 21, the ends of the panel 20 and the back plate 21 are sealed by a sealing strip 23, wherein the sound absorber 22 is arranged at intervals with the panel 20 and the back plate 21, so that cavity layers 24 and 25 are formed between two sides of the sound absorber 22 and the panel 20 and the back plate 21. The sound absorber 22 is composed of a sound absorbing layer 221 and a sound insulating layer 222. The sound absorption layer 221 is fixedly connected with the sound insulation layer 222 through bolts 26.

The sound absorption layer 221 may be a rock wool board, a mineral wool board, or a glass wool board. The sound insulation layer 222 is made of a material with a relatively high density, and for example, a fiber cement board, a fiber cement stiffened plate, or a metal plate may be used.

In the sound barrier 2, the sound absorber 22 is close to one surface of the panel 20 and adopts a porous rock wool board with good sound absorption effect to form the sound absorption layer 221, the surface close to the back plate 21 and adopts a fiber cement board material with low cost, high strength and high density and good sound insulation performance to form the sound insulation layer 222, and certain cavity layers 24 and 25 are arranged on two sides of the sound absorber 22, so that the sound absorption and sound insulation effects of the sound barrier are improved. Since noise is a sound wave, there is a reflection collapse phenomenon when passing through different media. Therefore the utility model discloses adopt the different medium of multilayer to reduce the identical effect of material simultaneously, improved the noise sound insulation sound absorption effect of sound barrier to different frequencies and very meaningful.

In order to fix the sound absorber 22 in the face plate 20 and the back plate 21, fixing plates are provided between both sides of the sound absorber 22 and the face plate 20 and the back plate 21.

Referring to fig. 3 and 4, the fixing plate includes an upper fixing plate 27 and a lower fixing plate 28, and both the upper and

lower fixing plates

27, 28 are in a shape of a Chinese character 'ao' with an unsealed bottom. The middle

inner grooves

271, 281 of the upper and

lower fixing plates

27, 28 are respectively engaged with the top and bottom of the sound absorber 22, and the two side

vertical walls

272, 273, 282, 283 thereof respectively abut against the inner side walls of the face plate 20 and the back plate 21. In the present embodiment, since the sound absorber 22 is convex at the upper part and concave at the lower part, accordingly, in order to effectively fix the sound absorber 22 between the face plate 20 and the back plate 21, the depth of the inner groove 271 of the upper fixing plate 27 is greater than that of the inner groove 281 of the lower fixing plate 28, the length of the two side

vertical walls

272 and 273 of the upper fixing plate 27 is less than that of the inner groove 271, and the length of the two side

vertical walls

282 and 283 of the lower fixing plate 28 is greater than that of the inner groove 281, so as to ensure that the sound absorber 22 is stably positioned.

The structure of the upper and

lower fixing plates

27 and 28 is not limited thereto as long as the sound absorber can be fixed between the face plate 20 and the back plate 21.

In order to save materials and fix the sound absorber 22 in the panel 20 and the back panel 21, cavity layers 24 and 25 are formed on two sides of the sound absorber 22, and the upper and lower fixing plates can be respectively fixed at the four corners of the top and the bottom of the sound absorber 22 in a clamping manner.

The panel 20 and the back plate 21 of the present invention can be made of the outer material of the known sound barrier, and at least the panel 20 is a perforated metal plate with holes, and the back plate 21 is also a metal plate. The front plate 20 and the back plate 21 may also be made of aluminum alloy plates.

When in use, the same sound barriers 2 are buckled and overlapped with each other to form the barrier.

The utility model discloses a hollow sound insulation barrier form around, middle for example by the sound insulation layer 222 that the fiber cement board constitutes can improve the intensity of sound barrier. The support strength of the known common perforated plate structure mainly depends on a face plate and a back plate, and the face plate and the back plate are both thin plate structures, so that the support strength is limited, the wind resistance is weak, and the support strength is generally used for two sides of a driving route of low-speed vehicles such as roads, railways, light rails and the like. Although the panel 20 and the back plate 21 of the utility model can adopt the known perforated plate structure, the sound absorption layer is arranged in the panel and the back plate, and a front hollow sound insulation barrier and a rear hollow sound insulation barrier are formed, so that the strength of the sound insulation barrier is obviously improved. And because the sound insulation layer 222 that the fiber cement board was made is big in thickness, and bending resistance is strong, and direct supporting panel 20 and backplate 21 have straightened panel 20 and backplate 21 in other words, make the utility model discloses can not only be used for low-speed vehicles's such as highway, railway, light rail travel route both sides, improve the sound insulation effect, when the air current that produces when wind-load or quick vehicle pass through strikes the sound barrier moreover, the utility model discloses can effectively resist the wind-load, reduce and warp, improve stability, so hollow sound insulation barrier can also be used to high-speed rail transit around adopting.

On the basis of a known sound barrier, the sound barrier adopts acoustic materials with different properties to replace an internal single sound absorption material, and simultaneously, a unique structural form is designed in a matching way, so that a better sound insulation effect is achieved.

As a specific example, a front hollow sound insulation barrier and a rear hollow sound insulation barrier are adopted, two acoustic materials with different properties are arranged inside the sound insulation barriers, a perforated plate is used as a bearing body (a panel 20 and a back plate 21), a sound insulation barrier structure with the thickness of 140mm is designed, the panel 20 is a perforated plate and a metal plate with the thickness of 1 mm is adopted as the panel, a rock wool plate with the thickness of 50mm is adopted as the sound absorption layer 221, a fiber cement plate with the thickness of 12mm is adopted as the sound insulation layer 222, the cavity layers 24 and 25 on the two sides are 39mm and 38.5mm, and the metal plate with the thickness of 1 mm is adopted. In order to fix the middle sound absorber 22 made of fiber cement boards and rock wool boards, fixing plates 27 for fixing are arranged at the four corners of each sound absorber unit component.

The utility model discloses a hollow sound insulation barrier form around, the centre has increased the thick fiber cement board of 12mm and has improved the sound insulation volume of sound barrier than prior art. In the laboratory, it was found that the sound insulation using the sound insulation barrier having the hollow front and rear of 140mm reaches 50 db, whereas the sound insulation using the known sound insulation barrier (140mm thickness) in which the inside of the perforated plate is entirely filled with the sound absorbing material is 40 db. Therefore, under the condition that the thickness of sound barrier equals, the utility model discloses can show the sound insulation volume that improves the sound barrier, moreover the utility model discloses owing to adopted hollow sound insulation barrier form around, reduced porous sound absorbing material's quantity, under the sound barrier contrast of the same thickness, 2/3's sound absorbing material can be practiced thrift.

The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.

Claims

1. The utility model provides a sound barrier, has panel and backplate, be equipped with the sound absorber between panel and the backplate, the tip of panel and backplate is sealed by the sealing strip, its characterized in that, separate the interval setting between sound absorber and panel, the backplate, form the cavity layer between the both sides of sound absorber and panel and the backplate.

2. The sound barrier of claim 1, wherein said sound absorber is comprised of a sound absorbing layer and a sound insulating layer.

3. The sound barrier of claim 2, wherein said sound absorbing layer is rock wool board and said sound insulating layer is fiber cement board or metal board.

4. The sound barrier of claim 2 or 3, wherein said sound absorbing layer is fixedly connected to said sound insulating layer by bolts.

5. The sound barrier of any one of claims 1 to 3, wherein fixing plates are provided between the sides of the sound absorber and the face plate and the back plate.

6. The sound barrier of claim 5, wherein said fixing plates comprise an upper fixing plate and a lower fixing plate, said upper and lower fixing plates are both in a shape of Chinese character 'ao' with unsealed bottoms; the inner grooves in the middle of the upper fixing plate and the lower fixing plate are clamped at the top and the bottom of the sound absorber respectively, and the vertical walls at two sides of the sound absorber abut against the inner side walls of the panel and the back plate.

7. The sound barrier of claim 6, wherein said upper and lower fixing plates are snap-fitted at the top and bottom corners of said sound absorber, respectively.

8. The sound barrier of claim 6, wherein said inner recess of said upper retaining plate has a depth greater than a depth of said inner recess of said lower retaining plate; and the length of the vertical walls on the two sides of the upper fixing plate is smaller than the depth of the inner groove of the upper fixing plate, and the length of the vertical walls on the two sides of the lower fixing plate is larger than the depth of the inner groove of the lower fixing plate.

9. The sound barrier of claim 1, wherein at least said panel is a perforated panel with sound absorbing apertures.

10. The sound barrier of claim 9, wherein said face sheet and back sheet are metal sheets.