Sound-insulation bulletproof and smash-proof composite glass

Abstract

The utility model discloses sound-proof bulletproof and smash-proof composite glass which comprises a glass outer reinforced acoustic outer plate, a glass reinforced high-impedance layer is fixedly arranged at one end of the inner side of the glass outer reinforced acoustic outer plate, and a glass reinforced low-impedance layer is fixedly arranged at one end of the inner side of the glass reinforced high-impedance layer; according to the utility model, the acoustic outer plate adopts a micro-perforated super-structure surface and a titanium alloy film backing sub-wavelength Helmholtz resonant cavity array, a better broadband sound absorption effect can be realized, the multi-stage impedance mismatch structure is composed of high-impedance lead borosilicate glass and low-impedance fluorinated ethylene propylene copolymer, the acoustic impedance difference between the high-impedance lead borosilicate glass and the low-impedance fluorinated ethylene propylene copolymer is greater than 5 times, and the sound absorption effect is better. When sound waves are transmitted among different impedance layers, the sound waves can be reflected for multiple times at an interface, so that the sound transmittance is reduced, and wedge-shaped interfaces are adopted among the layers of the multi-stage impedance mismatch structure, so that the sound waves can be scattered. The scattered sound waves interfere with each other and are offset, sound energy is further reduced, and the sound insulation effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of bulletproof glass equipment technology, specifically a soundproof, bulletproof and impact-resistant composite glass. Background Technology

[0002] In some special places, such as high-end residences, financial institutions, government office buildings and military facilities, effective sound insulation measures are needed to create a quiet internal environment, and bulletproof and impact-resistant capabilities are also required to resist potential violent threats. Traditional glass products often can only meet a single functional requirement and cannot simultaneously meet the requirements of sound insulation, bulletproof and impact resistance. Even if there is glass with perfect functions that meet the requirements of sound insulation, bulletproof and impact resistance, its sound insulation effect is poor and its use is inconvenient.

[0003] As disclosed in Publication No. CN219037769U, a bulletproof and impact-resistant composite glass includes a glass body, wherein the glass body comprises an outer impact-resistant layer, an inner reinforcing layer, and an aramid fiber layer. The outer impact-resistant layer is symmetrically arranged on both sides of the inner reinforcing layer. The inner reinforcing layer comprises multiple layers of glass fiber, and the glass fibers within these multiple layers extend in non-parallel or non-crossing directions. The aramid fiber layer is sandwiched between the multiple layers of glass fiber. The bulletproof and impact-resistant composite glass disclosed in this application possesses good strength, toughness, and elastic modulus. Combined with the robustness of the impact-resistant layer, it can achieve excellent bulletproof and impact-resistant effects. However, this glass does not possess high-performance sound insulation properties. Utility Model Content

[0004] The purpose of this utility model is to provide a soundproof, bulletproof and impact-resistant composite glass to solve the problem that existing bulletproof glass has poor sound insulation and is inconvenient to use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a soundproof, bulletproof, and impact-resistant composite glass, comprising: an outer glass acoustic panel, a glass-reinforced high-resistivity layer fixedly disposed at one end of the inner side of the outer glass acoustic panel, a glass-reinforced low-resistivity layer fixedly disposed at one end of the inner side of the glass-reinforced high-resistivity layer, a glass-reinforced viscoelastic damping layer fixedly disposed at one end of the inner side of the glass-reinforced low-resistivity layer, and a glass-reinforced bulletproof substrate layer fixedly disposed at one end of the inner side of the glass-reinforced viscoelastic damping layer.

[0006] As a further embodiment of this utility model: the glass outer acoustic plate is provided with a micro-perforated metastructure surface, the glass outer acoustic plate is a titanium alloy film with a gradient aperture of 50-200μm, and the glass outer acoustic plate is backed by a subwavelength Helmholtz resonant cavity array.

[0007] As a further improvement of this invention: the glass-reinforced high-resistivity layer is made of lead borosilicate glass, and the density of the glass-reinforced high-resistivity layer is 6.5 g / cm³. 3 .

[0008] As a further embodiment of this invention: the glass-reinforced low-impedance layer is made of fluorinated ethylene propylene copolymer, and the acoustic impedance of the glass-reinforced low-impedance layer is 0.8 MRayl.

[0009] As a further improvement of this invention: the glass-reinforced viscoelastic damping layer is made of butyl rubber / graphene nanosheet composite.

[0010] As a further improvement of this utility model, the glass-reinforced bulletproof substrate layer is made of multilayer chemically strengthened soda-lime glass.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention features a micro-perforated metasurface for the acoustic outer panel and a titanium alloy thin-film backing with a subwavelength Helmholtz resonant cavity array, achieving better broadband sound absorption. The multi-level impedance mismatch structure comprises high-impedance lead borosilicate glass and low-impedance fluorinated ethylene propylene copolymer, with an acoustic impedance difference greater than 5 times, enhancing reflection loss. When sound waves propagate between different impedance layers, multiple reflections occur at the interface, reducing sound transmittance. The wedge-shaped interface between the layers in the multi-level impedance mismatch structure scatters sound waves. The scattered sound waves interfere and cancel each other out, further reducing sound energy and improving sound insulation.

[0013] In this invention, the acoustic outer panel uses a titanium alloy thin-film metal surface, which enhances the glass's impact resistance. This makes the glass less prone to breakage when subjected to certain external impacts, thus improving overall safety. The multiple layers of chemically strengthened soda-lime glass in the bulletproof substrate layer effectively increase the glass's strength. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the soundproof, bulletproof, and impact-resistant composite glass described in this utility model;

[0015] Figure 2 This is a schematic diagram of the disassembled structure of the soundproof, bulletproof, and impact-resistant composite glass described in this utility model.

[0016] In the diagram: 10, glass-reinforced acoustic outer panel; 20, glass-reinforced high-impedance layer; 30, glass-reinforced low-impedance layer; 40, glass-reinforced viscoelastic damping layer; 50, glass-reinforced bulletproof substrate layer. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will be described below based on its overall structure.

[0019] Reference Figures 1 to 2 In the embodiments of this utility model:

[0020] Example 1

[0021] A soundproof, bulletproof, and impact-resistant composite glass includes: an outer glass-strengthened acoustic panel 10, a glass-strengthened high-resistivity layer 20 fixedly disposed at one end of the inner side of the outer glass-strengthened acoustic panel 10, a glass-strengthened low-resistivity layer 30 fixedly disposed at one end of the inner side of the glass-strengthened high-resistivity layer 20, a glass-strengthened viscoelastic damping layer 40 fixedly disposed at one end of the inner side of the glass-strengthened low-resistivity layer 30, and a glass-strengthened bulletproof substrate layer 50 fixedly disposed at one end of the inner side of the glass-strengthened viscoelastic damping layer 40.

[0022] The glass-reinforced acoustic outer plate 10 is provided with a micro-perforated metasurface. The glass-reinforced acoustic outer plate 10 is a titanium alloy film with a gradient aperture of 50-200μm. The glass-reinforced acoustic outer plate 10 is backed by a subwavelength Helmholtz resonant cavity array, which can achieve the effects of wideband sound absorption, peak factor of 0.9@1kHz, and improved impact resistance of the metal surface.

[0023] The glass-reinforced high-resistivity layer 20 is made of lead borosilicate glass, and the density of the glass-reinforced high-resistivity layer 20 is 6.5 g / cm³. 3 The glass-reinforced low-impedance layer 30 is made of fluorinated ethylene propylene copolymer, and the acoustic impedance of the glass-reinforced low-impedance layer 30 is 0.8 MNayl. The acoustic impedance difference is used to enhance the reflection loss; the interlayer wedge interface scatters sound waves.

[0024] The glass-reinforced viscoelastic damping layer 40 is made of butyl rubber / graphene nanosheet composite, which has high damping characteristics over a wide temperature range, while graphene improves thermal conductivity and prevents thermal softening.

[0025] The glass-reinforced bulletproof substrate layer 50 is made of multi-layer chemically strengthened soda-lime glass.

[0026] Example 2

[0027] Acoustic outer panel: micro-perforated metasurface

[0028] The microperforated metasurface employs a highly innovative design. Its core component is a titanium alloy film with a gradient aperture (50-200μm). Titanium alloy itself possesses numerous excellent properties: it is lightweight, high-strength, and has good corrosion resistance. This allows the acoustic outer panel to maintain performance while adapting to various harsh operating environments. The gradient aperture design is ingenious; the gradually changing aperture from 50μm to 200μm effectively processes sound waves of different frequencies. Smaller apertures have better capture and absorption capabilities for high-frequency sound waves, while larger apertures are better suited for handling low-frequency sound waves.

[0029] The subwavelength Helmholtz resonant cavity array in the backing is one of the keys to achieving broadband sound absorption in acoustic panels. The subwavelength scale design allows the resonant cavities to achieve efficient resonant absorption of sound waves within a relatively small space. Each Helmholtz resonant cavity has its specific resonant frequency, and through the proper design and arrangement of these resonant cavities, a wide frequency range can be covered, thereby achieving a broadband sound absorption effect.

[0030] Wideband sound absorption is one of the core functions of this acoustic panel. At a frequency of 1kHz, its peak absorption coefficient can reach 0.9, meaning that at this frequency, most sound waves can be effectively absorbed, greatly reducing sound wave reflection and scattering. This wideband sound absorption characteristic makes the acoustic panel widely applicable in many fields. For example, in acoustic laboratories, it can reduce external noise interference and improve the accuracy of experiments; in concert halls, theaters, and other venues, it can improve sound quality, reduce echoes, and provide audiences with a better listening experience.

[0031] The metal surface design not only enhances the impact resistance of the acoustic panel but also provides it with a degree of durability. In environments where it may be subjected to external impacts, such as industrial plants and outdoor equipment, the metal surface can effectively protect the internal micro-perforated structure and resonant cavity array, ensuring the normal operation of the acoustic panel.

[0032] Multi-stage impedance mismatch structure

[0033] The multi-stage impedance mismatch structure consists of alternating high-impedance and low-impedance layers. The high-impedance layer is made of lead borosilicate glass with a density of 6.5 g / cm³. 3 Lead borosilicate glass possesses high hardness and good chemical stability, while its high density results in a high acoustic impedance. This high impedance characteristic causes sound waves to encounter significant resistance when passing through this layer, leading to reflection.

[0034] The low-impedance layer is made of fluorinated ethylene propylene copolymer, with an acoustic impedance of 0.8 MNayl. Fluorinated ethylene propylene copolymer possesses good flexibility and chemical resistance, and its low acoustic impedance makes sound wave propagation relatively easy within this layer. When sound waves propagate between the high-impedance and low-impedance layers, a strong reflection loss occurs at the interface due to the greater than 5-fold difference in acoustic impedance between the two layers.

[0035] The interlayer wedge-shaped interface design further enhances the sound wave handling capability of the multi-stage impedance mismatch structure. When sound waves propagate to the wedge-shaped interface, scattering occurs. This scattering makes the propagation direction of the sound waves more complex, increasing the propagation path and the number of reflections within the structure, thereby further increasing reflection loss. In this way, the multi-stage impedance mismatch structure can effectively reduce sound wave transmission, achieving efficient sound wave isolation. This structure has significant application value in soundproofing equipment such as soundproof walls and soundproof enclosures, effectively reducing the impact of external noise on the internal environment.

[0036] Viscoelastic damping core

[0037] The viscoelastic damping core employs a butyl rubber / graphene nanosheet composite. Butyl rubber itself possesses excellent damping properties, capable of converting mechanical energy into heat energy, thereby dissipating vibrational energy. The addition of graphene nanosheets further enhances the material's performance. Graphene exhibits superior thermal conductivity and mechanical properties; uniformly dispersed graphene nanosheets within the butyl rubber effectively improve the material's thermal conductivity, preventing thermal softening due to heat accumulation during prolonged use.

[0038] This viscoelastic damping core maintains high damping characteristics across a wide temperature range (-40℃ to 80℃). At low temperatures, the molecular chain movement of butyl rubber is somewhat restricted, but due to the presence of graphene nanosheets, the material still maintains good flexibility and damping performance. At high temperatures, the high thermal conductivity of graphene can dissipate heat effectively, preventing the material from softening due to excessive temperature, thus ensuring the material's stability across a wide temperature range. This wide-temperature-range high damping characteristic makes the viscoelastic damping core a promising candidate for applications in aerospace, automotive, and other fields. In aerospace, aircraft experience varying temperature environments during flight; the viscoelastic damping core can effectively reduce vibration and noise in the aircraft structure, improving flight comfort and safety. In the automotive field, it can be applied to suspension systems, engine compartments, and other components to reduce vibration and noise, enhancing the passenger experience.

[0039] Bulletproof base layer

[0040] The system employs gradient polymer-infiltrated glass, which consists of multiple layers of chemically strengthened soda-lime glass (DoF>1000MPa). This gradient strengthening design effectively inhibits crack propagation. When a crack propagates within the glass, the presence of surface compressive stress hinders its extension, making it difficult for the crack to continue and thus ensuring the integrity of the bulletproof substrate layer.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A soundproof, bulletproof, and impact-resistant composite glass, characterized in that, include: A glass-reinforced acoustic outer panel (10) is provided with a glass-reinforced high-impedance layer (20) fixedly disposed at one end of the inner side of the glass-reinforced high-impedance layer (20), a glass-reinforced low-impedance layer (30) fixedly disposed at one end of the inner side of the glass-reinforced low-impedance layer (30), a glass-reinforced viscoelastic damping layer (40) fixedly disposed at one end of the inner side of the glass-reinforced viscoelastic damping layer (40), and a glass-reinforced bulletproof substrate layer (50) fixedly disposed at one end of the inner side of the glass-reinforced viscoelastic damping layer (40).

2. The soundproof, bulletproof, and impact-resistant composite glass according to claim 1, characterized in that, The glass-reinforced acoustic outer plate (10) is provided with a micro-perforated metasurface. The glass-reinforced acoustic outer plate (10) is a titanium alloy film with a gradient aperture of 50-200μm. The glass-reinforced acoustic outer plate (10) is backed by a subwavelength Helmholtz resonant cavity array.

3. The soundproof, bulletproof, and impact-resistant composite glass according to claim 1, characterized in that, The glass-reinforced high-resistivity layer (20) is made of lead borosilicate glass, and the density of the glass-reinforced high-resistivity layer (20) is 6.5 g / cm³. 3 .

4. The soundproof, bulletproof, and impact-resistant composite glass according to claim 1, characterized in that, The glass-reinforced low-impedance layer (30) is made of fluorinated ethylene propylene copolymer, and the acoustic impedance of the glass-reinforced low-impedance layer (30) is 0.8 MRayl.

5. The soundproof, bulletproof, and impact-resistant composite glass according to claim 1, characterized in that, The glass-reinforced viscoelastic damping layer (40) is made of butyl rubber / graphene nanosheet composite.

6. The soundproof, bulletproof, and impact-resistant composite glass according to claim 1, characterized in that, The glass-reinforced bulletproof substrate layer (50) is made of multilayer chemically strengthened soda-lime glass.

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