Sound absorption and insulation board

Abstract

The utility model relates to the technical field of sound absorption equipment, in particular to a sound absorption and insulation board which comprises a metal back board used for providing basic support for the sound absorption and insulation board. The metal framework group comprises two metal frameworks which are vertically arranged relative to the metal back plate and is used for providing fixed support for the sound absorption and insulation plate; the sound absorption and insulation layer is arranged between the metal framework groups and comprises a sound absorption material for absorbing noise and a sound transmission cloth bag for coating the sound absorption and insulation material; the perforated panel is arranged on the side, away from the metal back plate, of the sound absorption and insulation layer and used for transmitting noise so that the sound absorption material of the sound absorption and insulation layer can absorb the noise; according to the sound absorption and insulation board, the sound absorption material is specially screened expanded perlite particles, and the problems that when a traditional sound absorption and insulation board needs to be replaced or dismantled, the internal fiber sound absorption material causes secondary pollution to the environment and influences breathing health of people are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sound absorption equipment technical field especially, relates to a sound absorption and insulation board. BACKGROUND

[0002] Traditional wall sound absorption and insulation board, road sound barrier board etc. usually fill porous fiber materials (glass wool, rock wool etc.) as sound absorption materials. But with the upgrading of the relevant product standards of the state, the fiber products which are more harmful to human health are limited to use, so various types of new materials also emerge as the times require, such as replacing the original filling material with foamed aluminum, open-cell foamed ceramic or other open-cell foamed inorganic materials, but these materials have universal problems, including high cost, high brittleness, poor sound absorption effect (especially when it is used as a filler, the gap between the material and the sound absorption and insulation board frame must be sealed, otherwise the overall sound insulation performance will be greatly reduced). Therefore, under the premise of limited investment in the entire project, it is of great significance to find a new material that can replace the traditional porous fiber material (with similar flame-retardant properties, acoustic properties, cost, deformation ability). After a lot of research and testing, the expanded perlite particles can be used after a certain screening process, and the expanded perlite particles are mineral materials, which are usually used for thermal insulation, filtration filling, soil improvement, oil absorption, etc. But after screening and secondary mixing, it can be changed into a sound absorption material with adjustable performance, and has similar sound absorption performance to porous fiber materials (such as glass wool, rock wool, polyester fiber, etc.).

[0003] When the traditional sound absorption and insulation board needs to be replaced or removed, the environmental secondary pollution problem caused by the internal fiber sound absorption material. And the expanded perlite particles are not easily affected in normal use conditions (without severe extrusion, severe vibration, etc.), such as dryness, severe cold, high temperature, humidity, electrochemical corrosion or insect, fungus or algae growth, and have better performance stability. But the water absorption rate of expanded perlite particles is high, and the water resistance is poor, which will affect its acoustic effect, and the design of the surface metal perforated plate should consider rainproof and waterproof when designing the outdoor sound absorption and insulation board structure. UTILITARIAN CONTENT

[0004] Therefore, the utility model provides a sound absorption and insulation board to overcome the problem of secondary pollution of sound absorption materials to the environment in the prior art.

[0005] To achieve the above purpose, the utility model provides a sound absorption and insulation board, which comprises:

[0006] A metal back plate is used to provide basic support for the sound absorption and insulation board.

[0007] A metal skeleton group comprises two metal skeletons vertically arranged relative to the metal back plate, which provides fixed support for the sound absorption and insulation board.

[0008] The sound absorption layer is arranged between the metal frame groups, and includes sound absorption material for absorbing noise and sound transmission cloth bags for covering the sound absorption material;

[0009] The perforated panel is arranged on the side of the sound absorption layer away from the metal back plate, for transmitting noise to be absorbed by the sound absorption material of the sound absorption layer;

[0010] The sound absorption material is expanded perlite particles.

[0011] Further, the expanded perlite particles are mixed after being sieved through a 7-14 mesh sieve.

[0012] Further, the expanded perlite particles are mixed in a ratio of 30% for a particle size of 1.5-2.0 mm, 40% for a particle size of 2.0-3.0 mm, and 30% for a particle size of >3.0 mm.

[0013] Further, the expanded perlite particles are mixed in a ratio of 30% for a particle size of 1.5-2.0 mm, 40% for a particle size of 2.0-3.0 mm, and 30% for a particle size of >3.0 mm.

[0014] Further, the sound transmission cloth bag material is any one of non-woven fabric, glass fiber cloth, or polyester fiber cloth.

[0015] Further, the metal back plate and the perforated panel are provided with extensions relative to the metal frame, the extensions including upper extensions and lower extensions, the upper extensions being provided with protrusions, and the lower extensions being provided with grooves opposite the protrusions.

[0016] Further, the perforated panel is a fish scale panel.

[0017] Further, the perforated panel is any one of a galvanized steel panel, an aluminum panel, or a stainless steel panel.

[0018] Further, a shock absorption layer is arranged between the perforated panel and the sound absorption layer, the shock absorption layer including a plurality of small shock absorption air bags arranged close to the perforated panel and connected to the perforated panel.

[0019] Further, the shock absorption layer further includes a metal mesh arranged close to the sound absorption layer and connected to one end of the small shock absorption air bags away from the perforated panel.

[0020] Compared with the prior art, the beneficial effect of the utility model lies in that the filling raw material is set as expanded perlite particles, effectively solve the environmental secondary pollution problem caused by the internal fiber sound-absorbing material when the traditional sound-absorbing and insulating board needs to be replaced or removed and the influence on human respiratory health. And the expanded perlite particles are not easily affected in performance under normal use conditions (without serious extrusion, violent vibration, etc.), such as dry, severe cold, high temperature, humidity, electrochemical corrosion or insect, fungus or algae growth, and the performance stability is better. But the water absorption rate of the expanded perlite particles is high, and the water resistance is poor, which will affect its acoustic effect, and the design of the surface metal perforated plate should consider rainproof and waterproof when designing the outdoor sound-absorbing and insulating board structure. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the structure schematic view of the sound-absorbing and insulating board of the utility model embodiment;

[0022] Figure 2 It is the perforated panel structure schematic view of the sound-absorbing and insulating board of the utility model embodiment;

[0023] Figure 3 It is the fish scale hole plate structure schematic view of the sound-absorbing and insulating board of the utility model embodiment;

[0024] Figure 4 It is the connection structure schematic view of the sound-absorbing and insulating board of the utility model embodiment;

[0025] Figure 5 It is the structure schematic view of the shock absorbing layer of the sound-absorbing and insulating board of the utility model embodiment;

[0026] Figure 6 It is the A part enlarged view of the sound-absorbing and insulating board of the utility model embodiment;

[0027] Figure 7 It is the sound-absorbing coefficient test view of the sound-absorbing and insulating board of the utility model embodiment;

[0028] Figure 8 It is the sound insulation amount test view of the sound-absorbing and insulating board of the utility model embodiment. DETAILED DESCRIPTION

[0029] In order to make the purpose and the advantage of the utility model more clearly and clearly, the utility model is further described below with the embodiment, and it should be understood that the specific embodiment described here is only used for explaining the utility model, and is not used for limiting the utility model.

[0030] The preferred embodiments of the utility model are described below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used for explaining the technical principles of the utility model, and are not used for limiting the protection scope of the utility model.

[0031] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is merely for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0032] In addition, it should be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] Please refer to Figure 1 and Figure 2 It is a structural schematic diagram of the sound absorption and insulation board according to the embodiment of the present application.

[0034] The sound absorption and insulation board according to the embodiment of the present application comprises:

[0035] A metal back plate 1 is used to provide basic support for the sound absorption and insulation board;

[0036] A metal framework group 2 comprises two metal frameworks vertically arranged relative to the metal back plate, and is used to provide fixed support for the sound absorption and insulation board;

[0037] A sound absorption and insulation layer 3 is arranged between the metal framework groups, and comprises sound absorption material 31 used to absorb noise and sound transmission cloth bag 32 used to cover the sound absorption material;

[0038] A perforated panel 4 is arranged on the side of the sound absorption and insulation layer away from the metal back plate, and is used to transmit noise so that the sound absorption material of the sound absorption and insulation layer absorbs, the perforated panel comprises panel body 41 and a plurality of sound transmission holes 42 arranged on the panel body;

[0039] In the embodiment, the filling raw material is set as expanded perlite particles, effectively solving the problem of secondary environmental pollution caused by the internal fiber sound-absorbing material and the influence on human respiratory health when the traditional sound-absorbing and insulating board needs to be replaced or removed. Moreover, the performance of the expanded perlite particles is not easily affected under normal use conditions (without severe extrusion, violent vibration, etc.), such as dryness, severe cold, high temperature, humidity, electrochemical corrosion, or insect, fungus or algae growth, and the performance stability is better. However, the water absorption rate of the expanded perlite particles is high, and the water resistance is poor, which will affect the acoustic effect, and the design of the surface metal perforated plate should consider rain and water resistance when designing the outdoor sound-absorbing and insulating board structure. The perforated panel is any one of galvanized steel plate, aluminum plate and stainless steel plate.

[0040] Please refer to Figure 3 The perforated panel structure of the sound-absorbing and insulating board is shown in the figure.

[0041] In the embodiment of the utility model, the perforated panel is fish scale plate.

[0042] In the embodiment of the utility model, the fish scale plate can effectively prevent rainwater or moisture from entering the sound-absorbing and insulating layer and causing the sound-absorbing effect of the sound-absorbing and insulating layer to decrease by setting the perforated panel as a fish scale plate under the environment condition that needs to be rainproof.

[0043] Specifically, the sound-absorbing material is expanded perlite particles or mixed expanded perlite particles, and the mixed expanded perlite particles are composed of expanded perlite particles of several particle sizes.

[0044] Among them, the several particle sizes include expanded perlite particles obtained by sieving through a 7-mesh, 10-mesh or 14-mesh sieve.

[0045] Specifically, the expanded perlite particle product is usually mixed with particles of different particle sizes, and the proportion of various particle sizes of products from different manufacturers and different batches also differs greatly, accompanied by a certain proportion of particle powder (powder will block the pores of the material itself, thereby causing the sound-absorbing performance to decrease). Due to the above factors, the stability of the sound-absorbing performance of the expanded perlite particles is poor, and the expanded perlite particles need to be sieved before filling. The purpose is two-fold: first, to sieve out the small particles and powder with an average particle size of less than 1.5 mm (corresponding to a 14-mesh sieve) that affect the acoustic performance; second, the particles of different particle sizes after sieving can be mixed again according to the proportion to produce different sound-absorbing effects. The expanded perlite particles can realize adjustable and controllable sound-absorbing performance after secondary sieving.

[0046] Specifically, the sound-transmitting cloth bag material is any one of non-woven fabric, glass fiber cloth or polyester fiber cloth.

[0047] Specifically, the expanded perlite filling particles need to be packaged by using a sound-permeable cloth bag (made of non-woven fabric, glass fiber cloth, etc.) before filling to prevent particle leakage and facilitate replacement or cleaning of the inner material.

[0048] Please refer to Figure 4 Fig. 2 is a connection structure diagram of the sound absorption and insulation board according to the embodiment of the present application.

[0049] In the embodiment of the present application, the metal back plate 1 and the perforated panel 4 are provided with an extension part relative to the metal framework, the extension part includes an upper extension part 5 and a lower extension part 6, the upper extension part is provided with a protrusion 7, and the lower extension part is provided with a groove 8 opposite to the protrusion.

[0050] In the embodiment, the upper extension part and the lower extension part of the two sound absorption and insulation boards can be clamped during installation through the protrusion and the groove, so as to ensure the stability of installation.

[0051] Please refer to Figure 5 and Figure 6 as shown, Figure 5 Fig. 1 is a structure diagram of the shock-absorbing layer of the sound absorption and insulation board according to the embodiment of the present application; Figure 6 Fig. 2 is a connection structure diagram of the sound absorption and insulation board according to the embodiment of the present application.

[0052] The sound absorption and insulation board according to the embodiment of the present application further includes a shock-absorbing layer 9 arranged between the perforated panel 4 and the sound absorption and insulation layer 3, the shock-absorbing layer 9 includes a plurality of small shock-absorbing air bags 91 close to the perforated panel and connected with the perforated panel 4, and a metal mesh 92 close to the sound absorption and insulation layer and connected with one end of the small shock-absorbing air bag 91 away from the perforated panel 4.

[0053] In the embodiment of the present application, the connection between the small shock-absorbing air bag 91 and the perforated panel 4 includes but is not limited to magnetic connection, adhesion or heat welding; and the connection between the small shock-absorbing air bag 91 and the metal mesh 92 includes but is not limited to heat welding or adhesion.

[0054] Specifically, the embodiment of the present application ensures the stability of the sound absorption material between the metal back plate and the perforated panel during use of the sound absorption and insulation board by arranging a plurality of small shock-absorbing air bags, so as to improve the sound absorption effect, and the internal sound absorption material of the sound absorption and insulation board can be stably kept at the original position during horizontal use by arranging the shock-absorbing air bags, and the sound absorption material is supported by arranging the shock-absorbing air bags, so as to further ensure the stability of the sound absorption material and achieve better sound absorption effect.

[0055] The common appearance form of the sound absorption and insulation board commonly used in the current engineering is: metal back plate + metal perforated plate cover layer, the inside is filled with porous fiber sound absorption material (glass wool, rock wool, etc.), and the outside of the sound absorption material is wrapped with waterproof sound permeable cloth when applied outdoors. The structure has been widely applied in engineering, can be manually created or assembled into shape on the production line at one time, and the sound absorption and insulation performance has been generally recognized in the industry.

[0056] However, with the continuous strengthening of environmental protection awareness in the current noise reduction industry and the continuous upgrading of relevant national product standards, when the sound absorption and insulation filled with fiber sound absorption materials such as glass wool and rock wool needs to be replaced or removed, the internal fiber sound absorption material will cause secondary pollution to the environment and also has a greater impact on human respiratory health. Moreover, the disposal cost of waste is high, causing unnecessary waste.

[0057] The utility model discloses a traditional porous material filler is replaced by expanded perlite particles, and belongs to the development and application of new material functions. As a foaming type ore material, expanded perlite particles are usually used for thermal insulation, filtration filling, soil improvement, oil stain absorption and the like. However, after screening and secondary mixing, the expanded perlite particles can be changed into sound absorption materials with adjustable performance, and have similar sound absorption performance to porous fiber materials (such as glass wool, rock wool, polyester fiber and the like).

[0058] Please refer to Figure 7 The utility model discloses a sound absorption and insulation board sound absorption coefficient test diagram of embodiment, and the sound absorption coefficient of the sound absorption and insulation board is tested.

[0059] In the embodiment of the utility model, the impedance tube method is used to test the sound absorption coefficient of the expanded perlite particles and the centrifugal glass wool, the thickness of the expanded perlite particles and the centrifugal glass wool is 200mm, the particle size of the expanded perlite particles is 1.5mm-2.0mm, the particle size of the centrifugal glass wool is 2.0mm-3.0mm, the particle size of the expanded perlite particles is greater than 3.0mm, the density of the expanded perlite particles is about 80kg / m3, the brand of the centrifugal glass wool is Owens Corning, the thickness of the centrifugal glass wool is 200mm, and the volume weight of the centrifugal glass wool is 48kg / m3, and the test data are shown in the following table.

[0060]

[0061]

[0062] Referring to the above table and Figure 7 As shown in the above table and The first resonance frequency and the first anti-resonance frequency of the expanded perlite particles are larger than those of the glass wool in the medium-low frequency band below 500Hz, the first resonance frequency of the two materials is near 200Hz, but the sound absorption coefficient corresponding to the frequency of the expanded perlite is 0.95, while that of the glass wool is 0.75, so under the same test conditions, the overall sound absorption coefficient of the expanded perlite particles is higher than that of the glass wool.

[0063] Referring to Figure 8 As shown in the sound insulation test diagram of the sound insulation board of the embodiment of the utility model,

[0064] In the embodiment of the utility model, the size of the test piece is 1000mm*1000mm, the thickness is 80mm, the keel is made of 1.0mm thick steel plate, the back plate is made of 1.0mm thick aluminum plate, and the panel is made of 1.0mm thick perforated aluminum plate with a perforation rate of 25%.

[0065] The sample 1 is filled with 80mm thick glass wool with a bulk density of 48kg / m3, and the total weight of the filler is 3.8kg; the sample 2 is filled with 30mm thick foamed ceramic with a bulk density of 285kg / m3, and the total weight of the filler is 8.5kg; and the sample 3 is filled with 60mm thick expanded perlite with a bulk density of 80kg / m3, and the total weight of the filler is 4.8kg. The sound insulation spectrum data of 100-5000Hz are shown in the following table:

[0066]

[0067]

[0068] Referring to the above table and Figure 8 As shown in the sound insulation test diagram of the sound insulation board of the embodiment of the utility model,

[0069] The technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without deviating from the principles of the utility model, and the technical schemes after the changes or replacements will fall within the protection scope of the utility model.

[0070] The above is only the preferred embodiment of the utility model, and is not used to limit the utility model; for those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A sound absorbing and insulating panel, characterized in that, The utility model relates to a sound-absorbing and sound-insulating board, comprising: a metal backboard for providing basic support for the sound-absorbing and sound-insulating board; a metal frame set comprising two metal frames vertically arranged relative to the metal backboard for providing fixed support for the sound-absorbing and sound-insulating board; a sound-absorbing and sound-insulating layer arranged between the metal frame set, comprising sound-absorbing material for absorbing noise and sound-permeable cloth bags for covering the sound-absorbing material; a perforated panel arranged on the side of the sound-absorbing and sound-insulating layer away from the metal backboard for permeating noise so that the sound-absorbing material of the sound-absorbing and sound-insulating layer absorbs the noise, the perforated panel comprising a panel body and a plurality of sound-permeable holes arranged on the panel body; wherein the sound-absorbing material is expanded perlite particles.

2. The panel according to claim 1, characterized in that The sound-permeable cloth bags are made of any one of non-woven fabric, glass fiber cloth or polyester fiber cloth.

3. The panel according to claim 1, characterized in that The metal backboard and the perforated panel are provided with extensions relative to the metal frame, the extensions comprising upper extensions and lower extensions, the upper extensions are provided with protrusions, and the lower extensions are provided with grooves opposite the protrusions.

4. The panel according to claim 1, characterized in that The perforated panel is a fish scale pattern panel.

5. The panel according to claim 1, characterized in that The perforated panel is any one of galvanized steel plate, aluminum plate or stainless steel plate.

6. The acoustical panel of claim 1, wherein The utility model further comprises a shock-absorbing layer arranged between the perforated panel and the sound-absorbing and sound-insulating layer, the shock-absorbing layer comprising a plurality of small shock-absorbing airbags close to the perforated panel and connected to the perforated panel.

7. The panel according to claim 6, characterized in that The shock-absorbing layer further comprises a metal mesh close to the sound-absorbing and sound-insulating layer and connected to one end of the small shock-absorbing airbags away from the perforated panel.

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