CN221118281U - Sound barrier unit board containing novel membrane structure sound absorption assembly - Google Patents

Abstract

The utility model provides a sound barrier unit board containing a novel membrane structure sound absorption component, which comprises a shell and the sound absorption component positioned in the shell, wherein the shell comprises a panel, a back plate, an upper side plate and a lower side plate which are connected with the panel and the back plate, and the sound absorption component is arranged between the upper side plate and the lower side plate.

Description

Sound barrier unit board containing novel membrane structure sound absorption assembly

Technical Field

The present utility model relates to noise protection devices, and more particularly to a sound barrier cell panel incorporating a novel membrane structure sound absorbing assembly.

Background

The sound barrier is a means of interposing a means between the sound source and the receiver to provide a significant additional attenuation of the sound wave propagation, thereby attenuating the noise effects in the region where the receiver is located. The sound insulation barrier is divided into a traffic sound insulation barrier, an equipment noise attenuation sound insulation barrier, an industrial factory boundary sound insulation barrier, a highway and an expressway, and the place where various types of sound barriers are most used.

According to the material, the sound barrier can be generally divided into a metal sound barrier, a nonmetal sound barrier and a transparent sound barrier, the metal sound barrier and the nonmetal sound barrier generally comprise a shell and a sound absorption lining piece arranged in the shell, the existing sound absorption lining piece is generally made of glass wool, rock wool or melamine, and the like, but the manufacturing process of the glass wool, the rock wool and the like is large in damage to human bodies, the material itself is pulverized due to the influence of damp and heat and the like for a long time in the using process, and the pulverized particles and fibers of the material are also greatly polluted to the environment, so how to design and find the sound barrier containing the sound absorption component with environment friendliness, high sound absorption coefficient and good sound absorption effect becomes a technical problem to be solved in the industry.

Disclosure of utility model

The utility model aims to provide a sound barrier unit board containing a novel membrane structure sound absorption component.

The utility model adopts the technical proposal for solving the technical problems that: the utility model provides a contain novel membrane structure sound absorption assembly's sound barrier unit board, its includes the shell and is located the sound absorption assembly of shell, the shell is including being provided with panel, backplate and the connection of sound transmission hole panel and backplate's upper side board, downside, sound absorption assembly inlays and establishes between upper side board and the downside, sound absorption assembly includes micropore layer and thin film layer, the thin film layer sets up one side of micropore layer.

Preferably, the micropore plate layer is embedded between the upper side plate and the lower side plate, the periphery of the film layer is fixed by a frame and embedded between the upper side plate and the lower side plate, and the distance between the film layer and the micropore plate layer is larger than 1cm.

Preferably, the micropore plate layer is close to the panel side, the film layer is close to the back panel side, the distance between the micropore plate layer and the panel is 5-100 mm, the distance between the film layer and the back panel is 30-50 mm, the micropore plate is of a non-planar structure with a raised middle part, and the raised part faces the panel.

Preferably, the film is of a double-layer structure, the micro-pore plate is arranged between the panel and the film, and a gap between the double-layer structure of the film is 5-50 mm. .

Preferably, the film has a double-layer structure, and the microplates are disposed between the double-layer structures of the film.

Preferably, the microplate is formed by splicing two or more microplate segments.

Preferably, the microplate is formed by splicing three microplate sections, and the heights of at least two microplate sections are not equal.

Preferably, the cavity formed between the micropore plate layer and the film layer is a variable-section cavity, and the variable-section cavity is a gradual change structural unit comprising one or a plurality of two-end narrow middle wide or two-end wide middle narrow.

Preferably, the thickness of the micropore plate layer is 0.5-1.5 mm, and the thickness of the film layer is 20-50 μm.

Preferably, micropores are formed in the film layer, and the film material is one or two of PE, PVC, PP, PVF.

The beneficial effects of the utility model are as follows: the sound barrier unit board with the novel membrane structure sound absorption assembly adopts the novel sound absorption lining piece, replaces the existing materials with high environmental pollution such as glass wool, rock wool and the like with the environment-friendly metal material and plastic film, solves the problem of environmental pollution of the existing sound absorption material, has easily available raw material sources, is easy to manufacture and replace, has low cost and high sound absorption coefficient, and has wide application prospect.

Drawings

FIG. 1 is an exploded view of the overall structure of an embodiment of the present utility model;

A, B in fig. 2 is a schematic cross-sectional structure of two embodiments of the present utility model.

ABCDEFG in fig. 3 is a schematic cross-sectional view of embodiment 7 of the present utility model.

Detailed Description

Embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

As shown in fig. 1, 2 and 3, the embodiment of the utility model provides a sound barrier unit board containing a novel membrane structure sound absorption component, the sound barrier unit board comprises a shell and a sound absorption component arranged in the shell, the shell can be a metal shell or a nonmetal shell, the nonmetal shell is typically a cement shell or a plastic shell, and the metal shell is typically formed by bending and buckling an aluminum plate. The shell comprises a panel provided with sound transmission holes, a back plate, an upper side plate and a lower side plate, wherein the upper side plate and the lower side plate are connected with the panel and the back plate, and the sound absorption assembly is clamped between the upper side plate and the lower side plate. The sound absorption component comprises a micropore plate layer and a film layer, wherein the micropore plate layer is made of metal materials or nonmetal materials, the metal materials are aluminum micropore plates and stainless steel micropore plates which are made of aluminum, stainless steel and the like, the thickness of the metal micropore plate layer is generally set to be 0.5 mm-1.2 mm, different thicknesses are selected according to different materials, the thickness of the aluminum micropore plate is generally selected to be 0.8-1.2 mm, the thickness of the stainless steel micropore plate is selected to be 0.5-0.8 mm, and the micropore plate made of hard plastics is generally selected as the micropore plate made of nonmetal materials. The micropore plate layer and the film layer are arranged front and back, the micropore plate layer is close to the panel side, the distance between the micropore plate and the panel is 5-100 mm, the film layer is close to the backboard side, the distance between the film layer and the backboard is 30-50 mm, through experimental tests, when the film is 40mm away from the backboard, the sound absorption coefficient is highest, the film layer is parallel or approximately parallel to the rear side of the micropore plate layer, and the minimum distance between the film layer and the micropore plate layer is 20mm. Alternatively, the positions of the microplate and the membrane may be interchanged. In order to realize the up-down matching of the sound barrier unit plate, the upper side plate is provided with a bulge, the lower side plate is provided with a groove matched with the bulge, in order to prevent the micro-pore plate from shifting, the upper end and the lower end of the micro-pore plate are respectively provided with bending parts matched with the bulge and the groove, in the assembling state, the micro-pore plate is embedded between the upper side plate and the lower side plate, the bending parts are respectively adhered with the bulge and the groove to form a rigid connection-free structure, a fixed film is used for ensuring that the film is in a flat plane state and cannot shift, the periphery of the film is fixed by a frame and is embedded between the upper side plate and the lower side plate, one or two of PE, PVC, PP, PVF films are selected, the thickness of the film is 20-50 um, in order to increase resonance frequency, the sound absorption coefficient is improved, the micro-pore is arranged on the film, and the aperture ratio of the film is 2-5%.

The sound absorption frequency band of the film resonance sound absorption structure is middle-low frequency, the sound absorption frequency band of the microporous metal plate is middle-high frequency, therefore, the sound absorption assembly adopting the microporous metal plate and film combined structure is mutually compensated for the sound absorption frequency bands, the overall noise reduction coefficient is improved, compared with a single-layer microporous plate, the sound absorption frequency band is improved by 5% -10%, the film is preferably a microporous film, the microporous film is better than the microporous metal plate, micropores on the film have viscous effects on air, and accordingly the microporous film has enough acoustic resistance and low enough mass resistance, and the sound absorption capacity of the film is enhanced.

The micro-pore plate can be a planar micro-pore plate, in order to increase the noise reduction frequency bandwidth and increase the sound absorption coefficient, the micro-pore plate can also be a non-planar micro-pore plate, for example, the micro-pore plate is of a non-planar structure with a convex middle part, the convex part can be a bending type convex or a circular arc type convex, and the convex part faces the panel.

When the micro-pore plate is made of metal materials, particularly aluminum materials, in order to further reduce noise and increase the low-frequency band sound absorption coefficient, the micro-pore plate is formed by splicing two or more micro-pore plate sections, particularly, the micro-pore plate is formed by splicing three micro-pore plate sections, the heights of at least two micro-pore plate sections are unequal, the height proportion relationship between the micro-pore plate sections can be adjusted according to actual conditions, in one embodiment, as shown in fig. 2B and fig. 3A, the micro-pore plate is formed by splicing three micro-pore plate sections, the upper micro-pore plate section and the lower micro-pore plate section are shorter than the middle micro-pore plate section, the upper micro-pore plate section, the middle micro-pore plate section and the lower micro-pore plate section are positioned on the same plane to form a whole micro-pore plate, as other splicing modes, the micro-pore plate can also be formed by splicing two micro-pore plate sections, the heights of the upper micro-pore plate section and the lower micro-pore plate section are unequal, the height proportion of each micro-pore plate section can be changed by fixedly connecting or bonding screws. Compared with the sound absorption coefficient of the integrated double-micropore plate sound absorption structure formed by the whole micropore plates, the sound absorption coefficient of the separated double-micropore plate structure formed by the sectional micropore plates is improved by more than 10%, the sound absorption coefficient of the integrated double-micropore plate sound absorption structure formed by the sectional micropore plates is analyzed from the acoustic theory, the micropore plates have mechanical resonance capability, the double micropore plates, the panel and the backboard form a thin plate resonance structure together, the micropore plates in the integrated double-micropore plate sound absorption structure are rigidly connected with the panel and the backboard, so that the resonance frequency of the two micropore plates is equal to that of the panel and the backboard, the sound absorption frequency domain is narrow, and the sound absorption coefficient is relatively low. The inside of the separated double-micropore plate structure is provided with four or six micropore plate sections with different sizes, namely different masses, so that the vibration frequencies are also different, and the six or four micropore plates widen the sound absorption frequency domain, so that the sound absorption capacity of the separated double-micropore plate sound absorption structure is superior to that of the integrated double-micropore plate sound absorption structure.

In order to further improve the sound absorption coefficient, the cavity formed between the micro-pore plate and the film is a variable cross-section cavity, the variable cross-section cavity comprises one or a plurality of two-end narrow middle wide or two-end wide middle narrow gradual change structural units, specifically, as shown in A, B, C, D, E in fig. 3, the variable cross-section cavity is a cavity structure formed by the micro-pore plate with a non-planar structure and the film, the micro-pore plate with the non-planar structure is a structure with a raised middle part, the raised part faces the panel, the micro-pore plate with the non-planar structure comprises a plurality of raised structural units, and the protrusions are wedge-shaped or arc-shaped.

Preferably, in order to further improve the resonance sound absorption coefficient, the film is set to be a double-layer structure, the two layers of films are all fixed on the frame, the distance between the two layers of films can be selected to be 0-10 cm, micropores can be arranged on the film, in the specific embodiment, the aperture ratio is 3.5%, micropores can be arranged on one layer of film, and also micropores can be arranged on the two layers of films at the same time, in order to prevent the films from adhering, the films can be separated by a partition plate, the partition plate can be a honeycomb partition plate with sound absorption and noise reduction effects, because the double-layer film and the single-layer film belong to the resonance sound absorption structure, the resonance volume area of the double-layer film is increased relative to that of the single-layer film, the sound absorption coefficient of the double-layer film is higher than that of the single-layer film, particularly, the double-layer film is greatly lifted in a medium-low frequency region, and particularly, the double-layer film is found to have 25% -30% of sound absorption coefficient in the test. As other embodiments, as shown in F, G in fig. 3, the film is configured as a double-layer structure, the micro-pore plate is disposed between two layers of films, and the micro-pore plate may be a planar plate, or may be a non-planar plate, for example, a wedge-shaped or arc-shaped protrusion may be disposed, a protrusion may be disposed, or a plurality of protrusions may be disposed, and the above structure may be realized by bending the plate.

The above examples are intended to be illustrative only of one or more of the preferred embodiments of the present utility model, and all such variations and substitutions as would be apparent to one skilled in the art are deemed to be within the broad scope and ambit of the present utility model.

Claims (10)

1. The utility model provides a contain novel membrane structure sound absorption assembly's sound barrier unit board, its includes the shell and is located the sound absorption assembly of shell, the shell is including being provided with panel, backplate and the connection of sound transmission hole panel and backplate's upper side board, downside, the sound absorption assembly inlays and establishes between upper side board and the downside, its characterized in that, the sound absorption assembly includes micropore board layer and thin film layer, the thin film layer sets up one side of micropore board layer.

2. The sound barrier cell panel comprising a novel film structure sound absorbing assembly of claim 1, wherein the microporous sheet layer is embedded between the upper and lower side panels, the film layer perimeter is secured by a frame and embedded between the upper and lower side panels, and the spacing between the film layer and the microporous sheet layer is greater than 1cm.

3. The sound barrier cell panel comprising a novel film structure sound absorbing assembly of claim 2, wherein the micro-porous panel is adjacent to the panel side, the thin film layer is adjacent to the back panel side, the distance between the micro-porous panel and the panel is 5-100 mm, the distance between the thin film layer and the back panel is 30-50 mm, the micro-porous panel is a non-planar structure with a raised middle portion, and the raised portion faces the panel.

4. The sound barrier cell panel comprising a novel film structure sound absorbing assembly of claim 2, wherein the film is a bilayer structure, the microplates are disposed between the panel and the film, and a gap between the bilayer structures of the film is 5-50 mm.

5. The sound barrier cell panel comprising a novel film structure sound absorbing assembly of claim 2, wherein the film is a bilayer structure and the microplates are disposed between the bilayer structures of the film.

6. The sound barrier cell panel comprising a novel film structure sound absorbing assembly of claim 1, wherein the microplates are comprised of two or more microplate segments spliced together.

7. The sound barrier cell panel comprising a novel film structure sound absorbing assembly of claim 6, wherein said panel is comprised of three panel segments joined together, at least two of said panel segments being unequal in height.

8. The sound barrier cell panel comprising a novel film structure sound absorbing assembly according to any one of claims 1-7, wherein the cavity formed between the microporous sheet layer and the film layer is a variable cross-section cavity that is a tapered structural unit comprising one or several two-headed narrow middle widths or two-headed wide middle widths.

9. The sound barrier cell panel comprising the novel film structure sound absorbing assembly of claim 1, wherein the thickness of the microporous layer is 0.5-1.5 mm and the thickness of the film layer is 20-50 μm.

10. The sound barrier cell panel comprising the novel film structure sound absorbing assembly of claim 1, wherein the film layer is provided with micro-holes, and the film material is one or both of PE, PVC, PP, PVF.