阅读说明：本技术 一种可弯曲折叠的空心玻璃微珠夹层式柔性声反射结构及应用 (Bendable and foldable hollow glass bead interlayer type flexible sound reflection structure and application ) 是由 陈文剑 孙辉 殷敬伟 郭龙祥 于 2021-06-07 设计创作，主要内容包括：本发明提出一种可弯曲折叠的空心玻璃微珠夹层式柔性声反射结构及应用,该结构包括两个柔性薄膜和空心玻璃微珠层,空心玻璃微珠层位于两个柔性薄膜之间,空心玻璃微珠层为空心玻璃微珠均匀涂覆在柔性薄膜上制得,其厚度大于单个空心玻璃微珠粒径的10倍以上。解决了传统的声反射结构都是采用了以金属板为基础的复合结构,具有刚性特点,一次成型后就不能再改变其形状；另外利用传统的声反射结构制作成较大的声学反射体后,较大的体积也会带来运输、保存和使用上的不便的技术问题。本发明具有柔性特点,易于改变反射面形状；在运输和保存时,可进行弯曲折叠,不占地；采用空心玻璃微珠密度小,粒径一般在微米量级,具有重量轻的优点。(The invention provides a bendable and foldable hollow glass bead sandwich type flexible sound reflection structure and application thereof, wherein the structure comprises two flexible films and a hollow glass bead layer, the hollow glass bead layer is positioned between the two flexible films, the hollow glass bead layer is prepared by uniformly coating hollow glass beads on the flexible films, and the thickness of the hollow glass bead layer is more than 10 times of the particle size of a single hollow glass bead. The problem that the traditional sound reflection structure adopts a composite structure based on a metal plate, has the characteristic of rigidity, and can not change the shape after being formed once is solved; in addition, after the traditional sound reflection structure is used for manufacturing a larger acoustic reflector, the larger volume also brings inconvenience in transportation, storage and use. The invention has the characteristic of flexibility, and the shape of the reflecting surface is easy to change; when in transportation and storage, the folding chair can be bent and folded, and occupies no land; the hollow glass beads have small density, the particle size is generally in the micron order, and the hollow glass beads have the advantage of light weight.)

1. The utility model provides a flexible sound reflection configuration of hollow glass microballon intermediate layer formula of flexible folding which characterized in that, includes two flexible films (1) and hollow glass microballon layer (2), hollow glass microballon layer (2) are located between two flexible films (1), hollow glass microballon layer (2) are made on flexible film (1) for the even coating of hollow glass microballon, and its thickness is greater than more than 10 times of single hollow glass microballon particle diameter.

2. The utility model provides a flexible sound reflection configuration of hollow glass microballon intermediate layer formula of flexible folding which characterized in that, includes two flexible film (1) and layered hollow glass microballon layer, layered hollow glass microballon layer is located between two flexible film (1), layered hollow glass microballon layer includes hollow glass microballon layer (2) and the hollow glass microballon layer 3 of another kind of particle size, hollow glass microballon layer (2) and the hollow glass microballon layer (3) alternate arrangement of another kind of particle size, the hollow glass microballon particle size of two-layer adoption is different.

3. The bendable-foldable hollow glass bead sandwich-type flexible acoustic reflection structure according to claim 1 or 2, wherein the flexible film (1) is made of polyvinyl chloride, polyethylene, polypropylene or polystyrene.

4. A bendable folded hollow glass bead sandwich type flexible acoustic reflecting structure according to claim 1 or 2, characterized in that the hollow glass beads are uniformly coated on the flexible film (1) by a spraying or painting method.

5. The flexibly foldable hollow glass microsphere sandwich type flexible acoustic reflection structure according to claim 1 or 2, wherein the hollow glass microspheres are hollow closed spherical, powdery glass microspheres.

6. The bendable folded hollow glass bead sandwich type flexible sound reflecting structure according to claim 1 or 2, wherein the hollow glass beads have a particle size of 15 to 135 μm.

7. The bendable and foldable hollow glass bead sandwich type flexible sound reflection structure according to claim 1 or 2, wherein the compressive strength of the hollow glass beads is 1.7-124 Mpa.

8. The bendable folded hollow glass bead sandwich type flexible acoustic reflection structure according to claim 1 or 2, wherein the density of the hollow glass beads is 0.12-0.6 g/cm³。

9. Use of the bendable folded hollow glass bead sandwich type flexible acoustic reflector structure of any of claims 1 or 2 for making underwater acoustic corner reflectors and underwater acoustic baffles.

Technical Field

The invention relates to a bendable and foldable hollow glass bead interlayer type flexible sound reflection structure and application, and belongs to the technical field of underwater sound emission structures.

Background

The underwater acoustic material comprises a sound absorption material, a sound transmission material, an anti-sound material and the like, and in order to better achieve the required purpose, the defects of the acoustic performance of a single material or a composite material are made up, and the underwater acoustic material can be structurally designed and comprises a sound absorption structure, a sound transmission structure, an anti-sound structure and the like. The anti-sound material and the anti-sound structure are used for enhancing the reflection coefficient of sound waves, such as a reflection surface in an underwater corner reflector or an underwater corner reflector, an anti-sound baffle plate arranged behind a transducer element in a sonar transducer array and the like. In order to increase the reflection coefficient, a metal plate is generally used as the acoustic reflection structure, and the reflection coefficient in this case is related to the thickness of the metal plate and the acoustic frequency, and the thickness of the plate needs to be increased when the frequency is decreased.

Therefore, in the patent of 'an underwater vacuum corner reflector' (application number: 201921428243.X), the reflecting plate is designed into a vacuum cavity structure with two layers of metal plates fixedly connected along the periphery in a sealing way; in the patent of 'underwater sound corner reflector with air cavity' (application number: 201821924045.8), the reflecting plate is designed into an air cavity structure which is fixedly connected with the peripheries of two layers of metal plates in a sealing way and is internally provided with reinforcing ribs; in the patent of 'an underwater sound corner reflector with a foam interlayer' (application number: 201821924053.2), a reflecting plate is designed into two metal plates, and a light foam plastic layer is arranged between the two metal plates; in the patent "composite cavity sound baffle" (application No. 201910514351.7), a steel sheet is used to weld the cavity baffle into an air cavity. The traditional sound reflection structures all adopt a composite structure based on a metal plate, have the characteristic of rigidity, and can not change the shape after being formed once; in addition, the larger volume of the acoustic reflector manufactured by using the traditional acoustic reflection structure also brings inconvenience in transportation, storage and use.

Disclosure of Invention

The invention aims to solve the problems that the traditional sound reflection structure in the background art adopts a composite structure based on a metal plate, has the characteristic of rigidity, and can not change the shape after being formed once; in addition, after the traditional sound reflection structure is used for manufacturing a larger acoustic reflector, the larger volume also brings inconvenience in transportation, storage and use, and the bendable and foldable hollow glass bead sandwich type flexible sound reflection structure and application are provided.

The invention provides a bendable and foldable hollow glass bead sandwich type flexible sound reflection structure which comprises two flexible films and a hollow glass bead layer, wherein the hollow glass bead layer is positioned between the two flexible films, the hollow glass bead layer is prepared by uniformly coating hollow glass beads on the flexible films, and the thickness of the hollow glass bead layer is more than 10 times of the particle size of a single hollow glass bead.

The utility model provides a flexible sound reflection configuration of hollow glass microballon intermediate layer formula of flexible folding, includes two flexible films and layered hollow glass microballon layer, layered hollow glass microballon layer is located between two flexible films, layered hollow glass microballon layer includes the hollow glass microballon layer of hollow glass microballon layer and another kind of particle size, the hollow glass microballon layer alternate arrangement of hollow glass microballon layer and another kind of particle size, the hollow glass microballon particle size of adoption is different.

Preferably, the material of the flexible film is polyvinyl chloride, polyethylene, polypropylene or polystyrene.

Preferably, the hollow glass microspheres are uniformly coated on the flexible film by a spraying or smearing method.

Preferably, the hollow glass microspheres are hollow closed spherical and powdery glass microspheres.

Preferably, the particle size of the hollow glass bead is 15-135 μm.

Preferably, the compressive strength of the hollow glass beads is 1.7-124 MPa.

Preferably, the density of the hollow glass beads is 0.12-0.6 g/cm³。

The bendable and foldable hollow glass bead sandwich type flexible sound reflection structure and the application thereof have the beneficial effects that:

(1) the invention has the characteristic of flexibility, and the shape of the reflecting surface can be easily changed according to the requirement;

(2) the invention can be bent and folded during transportation and storage, and does not occupy larger space;

(3) the hollow glass bead sandwich type flexible sound reflection structure has the advantages of light weight because the density of the hollow glass bead is small and the grain size is generally in the micron order;

(4) the processing and manufacturing process is simple, and the main material hollow glass beads are cheap, so that the processing method has the advantage of low cost compared with the traditional processing of steel plates or air cavity steel plates and the like;

(5) the hollow glass bead sandwich type flexible sound reflection structure is a thin-layer structure and is easy to cut.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In the drawings:

FIG. 1 is a schematic view of a flexible, bendable, folded hollow glass bead sandwich-type acoustic reflector structure according to the present invention;

FIG. 2 is a schematic view of a layered hollow glass microsphere layer according to the present invention;

wherein, 1-flexible film, 2-hollow glass bead layer, and 3-hollow glass bead layer with another grain size.

Detailed Description

The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings:

the first embodiment is as follows: the present embodiment is explained with reference to fig. 1. This embodiment the flexible sound reflection configuration of hollow glass microballon intermediate layer formula of flexible folding, including two flexible film 1 and hollow glass microballon layer 2, hollow glass microballon layer 2 is located between two flexible film 1, hollow glass microballon layer 2 is the even coating of hollow glass microballon and makes on flexible film 1, and its thickness is greater than more than 10 times of single hollow glass microballon particle diameter.

Fig. 1 is a schematic diagram of a sandwich-type flexible acoustic reflection structure of hollow glass beads according to the present invention, which includes a flexible film 1 and a hollow glass bead layer 2 on two sides. The material of the flexible film 1 on both sides is preferably flexible film with certain tensile strength made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins. The hollow glass beads are uniformly coated on the flexible film 1 by a spraying or smearing method, and the thickness of the hollow glass beads is more than 10 times of the particle size of the hollow glass beads, so that a hollow glass bead layer 2 is formed. And the other flexible film is tightly and uniformly adhered to the hollow glass bead layer to form the hollow glass bead sandwich type flexible sound reflection structure with the flexible films on two sides and the hollow glass bead layer in the middle.

The hollow glass microspheres are hollow closed spherical and powdery glass microspheres. The hollow glass bead has a particle size of 15-135 mu m, a compressive strength of 1.7-124 Mpa and a density of 0.12-0.6 g/cm³。

The working principle of the bending and folding hollow glass bead sandwich type flexible sound reflection structure is as follows:

the hollow glass microsphere adopted by the invention has small density and particle size generally in micron order, so that the hollow glass microsphere sandwich type flexible sound reflection structure has the advantage of light weight, and the hollow glass microsphere is cheap, so that the hollow glass microsphere sandwich type flexible sound reflection structure has the advantage of low cost compared with the traditional processing of a steel plate or an air cavity steel plate and the like.

When sound waves are incident to the interface of two media, when the characteristic impedance of the two media is very different, most energy of the sound waves incident to the interface can be reflected by the interface, for example, the sound waves are incident to an air interface from water, and the characteristic impedance of the water is 1.5 multiplied by 10⁶Rayleigh, the characteristic impedance of air is 420 rayleigh, at which time the water/air interface can be considered as an absolute soft interface, the reflection coefficient is approximately-1, and the acoustic energy is completely returned to the water. The hollow glass beads are hollow thin-wall balls with the particle size of micron order, are integrally powdered, can be considered as a plane relative to the wave length of sound waves when being uniformly coated into a plane, and the coated layered structure is composed of a large number of hollow glass beads, and the overall density is far lower than the density of water, so the characteristic impedance of the hollow glass beads is larger than that of air but still far lower than that of water, and sound waves can be well reflected.

The glass beads with different particle sizes have different densities and compressive strengths. When the particle size is large, the density is small, and the compressive strength is small; small grain size, high density and high compression strength. Therefore, when the acoustic reflection structure of the hollow glass bead interlayer is used underwater, the glass beads with large particle size can be adopted in shallow water, the density is small, and the acoustic reflection coefficient is relatively large; when the glass roof is used in deep water, the glass roof with small grain size can be used, the density is high, and the acoustic reflection coefficient is relatively reduced.

The second embodiment is as follows: the present embodiment is explained with reference to fig. 2. This embodiment hollow glass bead intermediate layer formula flexible sound reflection configuration of flexible folding, including two flexible film 1 and layered hollow glass bead layer, layered hollow glass bead layer is located between two flexible film 1, layered hollow glass bead layer includes hollow glass bead layer 2 and the hollow glass bead layer 3 of another kind of particle size, hollow glass bead layer 2 and the hollow glass bead layer 3 alternate arrangement of another kind of particle size, the hollow glass bead particle size of adoption is different. Other structures are the same as those of the embodiment.

As shown in fig. 2, hollow glass beads with different particle sizes may be selected to be coated on the flexible film 1 in a layered manner, and the thickness of each layer may be the same or different. The hollow glass bead sandwich type flexible sound reflection structure with the flexible thin films 1 on two sides and the layered hollow glass bead layer in the middle is formed.

When the hollow glass microspheres are actually used, the hollow glass microspheres with the corresponding compressive strength are selected according to the water depth of a use occasion. The hollow glass beads have certain compressive strength, and if the sound reflection structure made of the hollow glass beads with large particle sizes is used in deep water, the hollow glass beads are broken, so that the sound reflection performance of the sound reflection structure is reduced and cannot be recovered. Therefore, after the hollow glass beads are selected, the hollow glass beads can only be used in water depth smaller than the compressive strength according to the compressive strength value of the hollow glass beads.

In particular, an underwater acoustic angle reflector and an underwater sound baffle which are manufactured by utilizing the hollow glass bead interlayer type flexible sound reflection structure belong to the protection scope of the patent of the invention.

The above-mentioned embodiments further explain the objects, technical solutions and advantages of the present invention in detail. It should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the present invention, and that the reasonable combination of the features described in the above-mentioned embodiments can be made, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.