Wave filling type sound absorption screen body

Abstract

The utility model discloses a wave filling type sound absorption screen body. The wave filling type sound absorption screen body comprises a sound absorption panel, a wave-shaped polyurethane sponge, a polyester fiber board and a sound insulation back board. The front part of the wave-shaped polyurethane sponge is wave-shaped, the rear part of the wave-shaped polyurethane sponge is fixedly connected with the polyester fiber board, and the wave-shaped polyurethane sponge and the polyester fiber board form an integrated wave filling structure; the wave filling structure is arranged between the sound absorption panel and the sound insulation back plate, the wave shape of the front portion of the wave-shaped polyurethane sponge faces the sound absorption panel, and small holes penetrating through a panel body of the sound absorption panel are distributed in the surface of the sound absorption panel. A plurality of fixing angle irons are arranged between the wave filling structure and the sound insulation back plate, and a cavity between the wave filling structure and the sound insulation back plate is divided into multiple cavities by the fixing angle irons. The wave-shaped polyurethane sponge and the polyester fiber board are combined to replace a traditional sound absorption material, multiple cavities are formed at the same time, sound wave energy is effectively attenuated and eliminated, and the sound absorption performance is improved while the cost is reduced.

Description

Technical Field

[0001] This application relates to the field of sound barrier technology, specifically to a wave-filled sound-absorbing screen. Background Technology

[0002] With the rapid development of the transportation industry, traffic noise pollution has become a critical problem that urgently needs to be solved. Sound barriers, as a core strategy in the current field of traffic noise control, are widely used in various traffic noise prevention and control measures. The performance of sound-absorbing panels, as an important component of sound barriers, directly determines the noise reduction effect of the sound barrier, and the noise reduction capacity of the sound-absorbing panels is determined by the sound-absorbing materials used.

[0003] Traditional sound-absorbing materials such as glass wool, aluminum foam, and rock wool have gradually revealed their shortcomings with technological advancements and changing application scenarios. These shortcomings include fragility, easy aging, easy moisture absorption, weak pressure, temperature, and moisture resistance, and poor durability. Therefore, the market urgently needs to develop new sound-absorbing materials. Currently, the research and application of sound barrier sound-absorbing materials mainly focus on porous sound-absorbing materials. Wavy polyurethane foam, after special treatment to form an undulating wave shape, is filled with tiny gaps and semi-open structures, which can absorb a large amount of incoming sound wave energy, attenuating sound waves. It not only has excellent sound insulation performance but also possesses characteristics such as fire resistance, anti-static properties, heat insulation, recyclability, and ease of processing and installation. Polyester fiberboard, as a porous material, has a sound absorption coefficient that increases with frequency, with a very high high-frequency sound absorption coefficient. Leaving cavities on the back of polyester fiberboard creates a spatial sound absorber, forming a broadband, high-efficiency sound absorber. Both are preferred materials in the fields of sound absorption and sound insulation. Summary of the Invention

[0004] The purpose of this application is to propose a wave-filled sound-absorbing screen with good sound absorption effect and low cost by combining wave-shaped polyurethane foam and polyester fiber board.

[0005] To achieve the above objectives, the technical solution provided in this application is as follows:

[0006] A wave-filled sound-absorbing screen includes a sound-absorbing panel, a wave-shaped polyurethane foam, a polyester fiber board, and a sound-insulating back panel.

[0007] The front part of the wavy polyurethane foam is wavy, and the rear part of the wavy polyurethane foam is connected and fixed to the polyester fiber board. The wavy polyurethane foam and the polyester fiber board form an integrated wavy filling structure.

[0008] The wave-shaped filling structure is located between the sound-absorbing panel and the sound-insulating back panel. The wave-shaped polyurethane foam is positioned with its front wave facing the sound-absorbing panel. Small holes penetrating the sound-absorbing panel are distributed on the surface of the sound-absorbing panel.

[0009] The wave-filled structure and the sound insulation back panel are provided with several fixed angle irons, which divide the cavity between the wave-filled structure and the sound insulation back panel into multiple cavities.

[0010] To optimize the above technical solutions, specific measures taken also include:

[0011] Furthermore, the fixed angle irons are evenly spaced, and each wave-filled sound-absorbing screen body is provided with 8 to 15 fixed angle irons.

[0012] In some embodiments, the total thickness of the corrugated polyurethane foam is 48-52 mm, wherein the thickness of the corrugations is 38-42 mm; the thickness of the corrugated polyurethane foam is greater than the thickness of the sound-absorbing panel; and the thickness of the polyester fiber board is 6-10 mm.

[0013] In some embodiments, the holes distributed on the surface of the sound-absorbing panel are circular holes with a diameter of 2.0 to 4.0 mm and a hole spacing of 5.0 to 7.0 mm.

[0014] Preferably, the rear part of the corrugated polyurethane foam is bonded to the polyester fiber board with adhesive; the corrugated filling structure is bonded to the fixing angle iron with adhesive.

[0015] Furthermore, the soundproof back panel is formed into a four-sided frame by mechanical bending, wherein the upper and lower frames have a tongue and groove structure.

[0016] Preferably, the sound-absorbing panel is made of aluminum alloy and the sound-insulating back panel is made of galvanized material.

[0017] The sound-absorbing panel, the wave-filled structure, and the sound-insulating back panel are connected as a whole by riveting.

[0018] Compared with the prior art, the beneficial effects of this application are:

[0019] This application provides a wave-filled sound-absorbing screen. By changing the internal structure of the sound barrier sound-absorbing screen, a combination of wave-shaped polyurethane foam and polyester fiber board is used to replace traditional sound-absorbing materials. At the same time, the multiple cavities formed can greatly improve the sound absorption performance while reducing costs.

[0020] The sound-absorbing panel of this invention has small holes distributed on its surface that penetrate the panel, enabling it to absorb sound waves. A wave-shaped filling structure is provided between the sound-absorbing panel and the sound-insulating back panel, with the wave-shaped polyurethane foam facing the sound-absorbing panel. Due to its fully open three-dimensional grid system, the wave-shaped polyurethane foam allows sound waves to quickly and effectively penetrate deep into the interior and be dissipated as vibrations within the grid. Furthermore, its wave-shaped shape causes sound waves to undergo multiple reflections and absorptions within the foam, effectively attenuating and eliminating sound wave energy. At the same time, the fixed angle iron divides the cavity between the wave-shaped filling structure and the sound-insulating back panel into multiple cavities, forming a spatial sound absorber and improving the overall sound absorption performance of the material. Attached Figure Description

[0021] Figure 1 Elevation view of the wave-filled sound-absorbing screen of this utility model.

[0022] Figure 2 : A schematic diagram of the sound-absorbing panel in the wave-filled sound-absorbing screen of this utility model.

[0023] Figure 3 : A top view cross-sectional diagram of the wave-filled sound-absorbing screen of this utility model.

[0024] Figure 4 : Frequency response curve of sound insulation of wave-filled sound-absorbing screen sample in this embodiment of the present invention.

[0025] Figure 5 Frequency characteristic curve of sound absorption performance of wave-filled sound-absorbing screen sample in this embodiment of the present invention.

[0026] In the diagram, 1-sound-absorbing panel, 2-corrugated polyurethane foam, 3-polyester fiberboard, 4-sound-insulating back panel, 5-fixed angle iron. Detailed Implementation

[0027] The following examples will further illustrate the above-mentioned content of this application in detail, but it should not be construed as limiting the scope of the above-mentioned subject matter of this application to the following examples. All technologies implemented based on the above-mentioned content of this application are within the scope of this application.

[0028] This application provides a wave-filled sound-absorbing screen, such as Figure 1-3 As shown, it includes a sound-absorbing panel 1, a corrugated polyurethane foam 2, a polyester fiber board 3, and a sound-insulating back panel 4.

[0029] The front part of the wavy polyurethane foam 2 is wavy, and the rear part of the wavy polyurethane foam 2 is connected and fixed to the polyester fiber board 3. The wavy polyurethane foam 2 and the polyester fiber board 3 form an integrated wavy filling structure.

[0030] A wave-shaped filling structure is placed between the sound-absorbing panel 1 and the sound-insulating back panel 4. The wave-shaped polyurethane foam 2 has a wave-shaped face at the front of the sound-absorbing panel 1. Small holes penetrating the sound-absorbing panel 1 are distributed on the surface of the sound-absorbing panel 1.

[0031] Several fixed angle irons 5 are provided between the corrugated filling structure and the sound insulation back panel 4. The fixed angle irons 5 divide the cavity between the corrugated filling structure and the sound insulation back panel 4 into multiple cavities.

[0032] In some embodiments, the fixed angle irons 5 are evenly spaced, and each wave-filled sound-absorbing screen body is provided with 8 to 15 fixed angle irons 5.

[0033] In some embodiments, the thickness of the fixing angle iron 5 is the same as the thickness of the cavity between the corrugated filling structure and the sound insulation back panel 4. In some embodiments, the total thickness of the corrugated polyurethane foam 2 is 48-52 mm, of which the thickness of the corrugations is 38-42 mm; the thickness of the corrugated polyurethane foam 2 is greater than the thickness of the sound-absorbing panel 1; and the thickness of the polyester fiber board 3 is 6-10 mm.

[0034] In some embodiments, the holes distributed on the surface of the sound-absorbing panel 1 are circular holes with a diameter of 2.0 to 4.0 mm and a hole spacing of 5.0 to 7.0 mm.

[0035] In some embodiments, the rear part of the corrugated polyurethane foam 2 is glued to the polyester fiber board 3; the corrugated filling structure is glued to the fixed angle iron 5.

[0036] In some implementations, the soundproof back panel 4 is formed by mechanical bending to create a four-sided frame, wherein the upper and lower frames have tongue and groove structures.

[0037] Preferably, the sound-absorbing panel 1 is made of aluminum alloy, and the sound-insulating back panel 4 is made of galvanized material.

[0038] The sound-absorbing panel 1, the wave-filled structure, and the sound-insulating back panel 4 are connected as a whole by riveting.

[0039] This application provides a method for manufacturing a wave-filled sound-absorbing screen, including the following steps:

[0040] Step 1: Select different raw boards according to material requirements, and mechanically punch holes in their surfaces to make sound-absorbing panels 1;

[0041] Step 2: Take the corrugated polyurethane foam 2 and the polyester fiber board 3, and bond them together to form a corrugated filling structure;

[0042] Step 3: Connect the sound-absorbing panel 1, the corrugated polyurethane foam 2, the polyester fiber board 3, and the sound insulation back panel 4 into a whole by riveting. The polyester fiber board 3 and the sound insulation back panel 4 are divided into multiple cavities by a fixed angle iron 5.

[0043] The present application will be further described in detail below with reference to specific embodiments:

[0044] A wave-filled sound-absorbing screen includes a sound-absorbing panel 1, a wave-shaped polyurethane foam 2, a polyester fiber board 3, a sound-insulating back panel 4, and a fixing angle iron 5. The surface of the sound-absorbing panel 1 has small holes that penetrate the panel. The wave-shaped polyurethane foam 2 and the polyester fiber board 3 are fixed together with glue and located between the sound-absorbing panel 1 and the sound-insulating back panel 4. The sound-insulating back panel 4 is sealed to the outside of the polyester fiber board 3. The two are separated into multiple cavities by the fixing angle iron 5.

[0045] The manufacturing process of the above-mentioned wave-filled sound-absorbing screen is as follows:

[0046] (1) Sound-absorbing panel 1: Take a 1.4mm thick aluminum alloy plate, drill small holes with a diameter of 3.0mm on the surface, and the hole spacing is 6.0mm;

[0047] (2) Wave filling structure: It is made of wave-shaped polyurethane foam 2 and polyester fiber board 3 by bonding. The total thickness of wave-shaped polyurethane foam 2 is 50mm, the thickness of the wave is 40mm, and the thickness of polyester fiber board 3 is 8mm.

[0048] (3) Sound insulation back panel 4: Take a 1.5mm thick galvanized steel plate and form a 4-sided frame and upper and lower frames with tongue and groove through mechanical bending;

[0049] (4) Sound-absorbing screen: The bent sound insulation back panel 4 and the sound-absorbing panel 1 are combined to form a wave-filled structure using stainless steel blind rivets. Polyester fiber board 3 and sound insulation back panel 4 are connected by fixed angle irons to form multiple cavities. Each board is fixed with 12 fixed angle irons.

[0050] Performance testing: The dimensions of a single test sample are 1960*496*115 (mm), with a sample quantity of 12 pieces. The mass per unit area is 26.8 kg / m². 2 .

[0051] (1) Weighted sound insulation: The volume of the test receiving room is 98m³. 3 The sound source chamber has a volume of 81m³. 3 The infill wall was made of 460mm thick aerated concrete blocks, with a sound insulation of 54dB. The seams between the test sample and the wall were sealed with cement mortar. The test environment was 22℃~23℃, and the relative humidity was 53%~54%. The sound insulation and frequency parameters of the sound-absorbing screen are shown in Table 1, and the characteristic curves are shown in... Figure 4 As shown. Based on laboratory measurements and calculated according to GB / T 50121-2005, the weighted sound insulation R of this sound-absorbing screen is... w =27(-1; -2)dB.

[0052] Table 1 Sound Insulation and Frequency Parameters

[0053]

[0054]

[0055] (2) Noise Reduction Coefficient: Test environment: 21℃, relative humidity 62%. During the test, the sample was laid flat on the ground. The noise reduction coefficient and frequency parameters of the sound-absorbing screen are shown in Table 2, and the frequency response curve of the sound absorption performance is shown in Table 2. Figure 5 As shown. Based on laboratory measurements and calculated according to GB / T 16731-1997, the noise reduction coefficient (NRC) of this sound-absorbing screen is 0.80.

[0056] Table 2 Sound Absorption Coefficient and Frequency Parameters

[0057] Frequency f (Hz) sound absorption coefficient 100 0.13 125 0.15 160 0.24 200 0.56 250 0.75 315 0.71 400 0.63 500 0.82 630 0.94 800 0.74 1000 0.80 1250 0.75 1600 0.91 2000 0.81 2500 0.91 3150 0.82 4000 0.90 5000 0.91 Noise Reduction Coefficient (NRC) 0.80

[0058] In this application, the wavy polyurethane foam has a fully open three-dimensional grid system, which allows sound waves to quickly and effectively penetrate into the deep interior and be transformed into vibrations of the grid that are consumed. Furthermore, its wavy shape causes sound waves to undergo multiple reflections and absorptions within the foam, effectively attenuating and eliminating sound wave energy. Multiple cavities are left between the polyester fiber board and the sound insulation back panel to form a spatial sound absorber, which improves the overall sound absorption performance of the material.

[0059] The above description is merely a preferred embodiment of this application and does not constitute any limitation on this application. Any simple modifications, equivalent substitutions, and improvements made by those skilled in the art to the above embodiments without departing from the scope of the technical solution of this application, based on the technical essence of this application, shall still fall within the protection scope of the technical solution of this application.

Claims

1. A wave-filled sound-absorbing screen, characterized in that: Includes sound-absorbing panels, corrugated polyurethane foam, polyester fiberboard, and sound-insulating back panel; The front part of the wavy polyurethane foam is wavy, and the rear part of the wavy polyurethane foam is connected and fixed to the polyester fiber board. The wavy polyurethane foam and the polyester fiber board form an integrated wavy filling structure. The wave-shaped filling structure is located between the sound-absorbing panel and the sound-insulating back panel. The wave-shaped polyurethane foam is positioned with its front wave facing the sound-absorbing panel. Small holes penetrating the sound-absorbing panel are distributed on the surface of the sound-absorbing panel. The wave-filled structure and the sound insulation back panel are provided with several fixed angle irons, which divide the cavity between the wave-filled structure and the sound insulation back panel into multiple cavities.

2. The wave-filled sound-absorbing screen according to claim 1, characterized in that: The fixed angle irons are evenly spaced, and each wave-filled sound-absorbing screen has 8 to 15 fixed angle irons.

3. The wave-filled sound-absorbing screen according to claim 1, characterized in that: The total thickness of the corrugated polyurethane foam is 48-52 mm, of which the thickness of the corrugations is 38-42 mm; the thickness of the corrugated polyurethane foam is greater than the thickness of the sound-absorbing panel; the thickness of the polyester fiber board is 6-10 mm.

4. The wave-filled sound-absorbing screen according to claim 1, characterized in that: The sound-absorbing panel has small holes distributed on its surface. These holes are circular and have a diameter of 2.0 to 4.0 mm. The spacing between the holes is 5.0 to 7.0 mm.

5. The wave-filled sound-absorbing screen according to claim 1, characterized in that: The rear part of the corrugated polyurethane foam is bonded to the polyester fiber board with adhesive; the corrugated filling structure is bonded to the fixing angle iron with adhesive.

6. The wave-filled sound-absorbing screen according to claim 1, characterized in that: The soundproof back panel is formed by mechanical bending to create a four-sided frame, with the upper and lower frames featuring a tongue-and-groove structure.

7. The wave-filled sound-absorbing screen according to claim 1, characterized in that: The sound-absorbing panel is made of aluminum alloy, and the sound-insulating back panel is made of galvanized material.

8. The wave-filled sound-absorbing screen according to claim 1, characterized in that: The sound-absorbing panel, the wave-filled structure, and the sound-insulating back panel are connected as a whole by riveting.

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