A foamed ceramic sound barrier board

Abstract

The utility model discloses a foamed ceramic sound barrier plate, comprising a closed-cell foamed ceramic layer, an open-cell foamed ceramic layer and a connecting piece, wherein the side wall of the closed-cell foamed ceramic layer is closely connected to the side wall of the open-cell foamed ceramic layer through the connecting piece. The utility model has a simple processing technology, can be formed in one step, and the foamed ceramic has good water and acid resistance, so compared with the traditional sound barrier plate, the performance is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of sound barrier panels, in particular to a foamed ceramic sound barrier panel. Background Art

[0002] At present, the sound barrier panels commonly used in engineering are mainly metal sound barrier panels. The common structural forms from the inside to the outside are metal perforated plate + porous sound-absorbing material + metal back plate. This structure has been applied on a large scale in engineering projects. It can be hand-made or assembled in one go on the production line. The sound barrier performance has also been widely recognized in the industry. However, as time goes by, the problems of this structure have continued to emerge. Especially when this type of sound barrier panel is used outdoors, the porous sound-absorbing material inside is exposed to long-term ultraviolet radiation and repeated intrusion of rainwater, resulting in fiber breakage and natural sinking, resulting in a significant decrease in acoustic performance. Moreover, when replaced or removed, the porous sound-absorbing material inside will cause secondary pollution to the environment, and the disposal cost of the waste is high.

[0003] Therefore, there is an urgent need for a foamed ceramic sound barrier board. Utility Model Content

[0004] The purpose of the utility model is to provide a foamed ceramic sound barrier board to solve the problem that the existing sound barrier boards in the above-mentioned background technology are prone to fiber breakage and natural sinking during use.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] The utility model provides a foamed ceramic sound barrier plate, comprising a closed-cell foamed ceramic layer, an open-cell foamed ceramic layer and a connecting piece, wherein the side wall of the closed-cell foamed ceramic layer is tightly connected to the side wall of the open-cell foamed ceramic layer through the connecting piece.

[0007] The foamed ceramic sound barrier plate preferably has countersunk holes on the closed-cell foamed ceramic layer, and connecting parts are provided on the countersunk holes and the open-cell foamed ceramic layer to ensure that the side walls of the closed-cell foamed ceramic layer are tightly connected to the side walls of the open-cell foamed ceramic layer.

[0008] The foamed ceramic sound barrier board, preferably, the connecting part includes a first hook and a second hook, the first hook is provided on the countersunk hole, and the second hook is provided on the open-pored foamed ceramic layer, and the first hook and the second hook can be locked with each other.

[0009] The foamed ceramic sound barrier board preferably has a closed-cell foamed ceramic layer with a thickness of 25mm-100mm.

[0010] The foamed ceramic sound barrier board preferably has a thickness of the open-pore foamed ceramic layer of 25 mm to 100 mm.

[0011] The utility model has the following advantages due to the adoption of the above technical solution:

[0012] 1. Closed-cell foamed ceramics have a sound insulation effect, while open-cell foamed ceramics have a sound absorption effect. The two are combined through connectors, which makes on-site installation convenient and efficient, and also easy to transport.

[0013] 2. The raw materials of closed-cell foamed ceramics and open-cell foamed ceramics are taken from the tailings of various ores. They are a recycling of natural solid waste and there is no secondary pollution problem.

[0014] The utility model has a simple processing technology and can be formed in one time. The foamed ceramic has good water and acid resistance, so compared with traditional sound barrier panels, the performance is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure of the closed-cell foamed ceramic layer;

[0017] Figure 3 It is a structural schematic diagram of an open-pore foamed ceramic layer.

[0018] Reference numerals in the figures:

[0019] 1. Closed-cell foamed ceramic layer; 2. Open-cell foamed ceramic layer; 3. First hook; 4. Second hook; 5. Countersunk hole; 6. Expansion screw. DETAILED DESCRIPTION

[0020] To make the purpose, technical solution, and advantages of the present invention more clearly apparent, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0021] In the description of this utility model, it should be noted that the terms "sidewall" and other designations of orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the system or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the use of terms such as "first" and "second" to define components is solely for the purpose of distinguishing between such components. Unless otherwise stated, these terms have no special meaning and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the term "provided with" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0023] The present invention provides a foamed ceramic sound barrier panel. The panel comprises a closed-cell foamed ceramic layer, an open-cell foamed ceramic layer, and a connector. The sidewalls of the closed-cell foamed ceramic layer are tightly connected to the sidewalls of the open-cell foamed ceramic layer via the connector. The panel is simple to manufacture and can be formed in one go. The foamed ceramic panel also exhibits excellent water and acid resistance, resulting in more stable performance compared to traditional sound barrier panels.

[0024] Below, a foamed ceramic sound barrier board provided in an embodiment of the present invention is described in detail with reference to the accompanying drawings.

[0025] Reference Figure 1 and Figure 2 The foamed ceramic sound barrier plate shown includes a closed-cell foamed ceramic layer 1, an open-cell foamed ceramic layer 2 and a connecting piece. The side wall of the closed-cell foamed ceramic layer 1 is tightly connected to the side wall of the open-cell foamed ceramic layer 2 through the connecting piece. The closed-cell foamed ceramic 1 plays a sound insulation role, and the open-cell foamed ceramic 2 plays a sound absorption role.

[0026] The closed-cell foamed ceramic layer 1 is provided with an open countersunk hole 5, and a connecting piece is provided on the open-cell foamed ceramic layer 2. The countersunk hole 5 is circular or rectangular in shape and has a depth of 10mm-30mm.

[0027] There are at least one connecting piece and at least one countersunk hole 5 , and the center distance between adjacent countersunk holes 5 is 600mm-1200mm.

[0028] The connecting piece includes a first hook 3 and a second hook 4. The first hook 3 is provided on the countersunk hole 5, and the second hook 4 is provided on the open-pored foamed ceramic layer 2. The first hook 3 and the second hook 4 can be locked with each other.

[0029] The first hook 3 and the second hook 4 are respectively arranged on the first hook 3 and the second hook 4 through expansion screws 6 .

[0030] The thickness of the closed-cell foamed ceramic layer 1 is 25 mm to 100 mm.

[0031] The thickness of the open-cell foamed ceramic layer 2 is 25 mm to 100 mm, the porosity of the open-cell foamed ceramic layer 2 is 0.85 to 0.95, and the flow resistance of the open-cell foamed ceramic layer 2 is 14500 to 16500 Pa·s / m 2 , the tortuosity is 1, the viscous characteristic length is 8.0-9.0μm, and the thermal characteristic length is 750-800μm.

[0032] 1. Sound insulation performance test of foamed ceramic sound barrier panels and traditional metal sound barrier panels

[0033] The structure of the foamed ceramic sound barrier is composed of 50mm open-pore foamed ceramic (density 285kg / m 3 ) + 50mm closed-cell foamed ceramic (density 400kg / m 3 );

[0034] The structure of the traditional metal sound barrier is composed of a galvanized perforated plate (thickness 0.8mm, aperture 3mm, perforation rate 23%) on the front panel, a galvanized blind plate (thickness 1.2mm) on the back panel, and centrifugal glass fiber wool (thickness 100mm, bulk density 32kg / m 3 ), the protective cloth is made of alkali-free hydrophobic glass fiber cloth.

[0035] The sound insulation performance test data of foamed ceramic sound barrier panels and traditional metal sound barrier panels are shown in Table 1 below.

[0036] Table 1 Sound insulation performance test of foamed ceramic sound barrier panels and traditional metal sound barrier panels

[0037]

[0038] From the comparison data, we can see that the weighted sound insulation R w Both are 38dB, but due to the material advantages of the foam ceramic sound barrier board, high-frequency noise is not easily radiated through the back panel, so the high-frequency sound insulation performance is more advantageous than the traditional metal sound barrier board.

[0039] 2. Sound absorption performance of open-cell foamed ceramic and centrifugal glass wool using impedance tube method

[0040] Open-cell foamed ceramic (thickness 50mm, density 285kg / m 3 ) and centrifugal glass wool (thickness 50mm, bulk density 32kg / m 3 The impedance tube sound absorption performance test data of the ) are shown in Table 2 below:

[0041] Table 2 Sound absorption performance of open-cell foam ceramics and centrifugal glass wool using impedance tube method

[0042]

[0043] From the data, we can see that for sound-absorbing layers of the same thickness, open-pore foam ceramics have greater advantages in sound absorption performance in the mid- and low-frequency bands where noise is more difficult to control, and the overall average sound absorption performance is better than that of centrifugal glass wool of the same thickness.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A foamed ceramic sound barrier board, characterized in that: The invention comprises a closed-cell foamed ceramic layer, an open-cell foamed ceramic layer and a connecting piece, wherein the side wall of the closed-cell foamed ceramic layer is closely connected with the side wall of the open-cell foamed ceramic layer through the connecting piece.

2. The foamed ceramic sound barrier board according to claim 1, characterized in that: The closed-cell foamed ceramic layer is provided with open countersunk holes, and the open countersunk holes and the open-cell foamed ceramic layer are provided with connecting pieces to achieve close connection between the side walls of the closed-cell foamed ceramic layer and the side walls of the open-cell foamed ceramic layer.

3. The foamed ceramic sound barrier board according to claim 2, characterized in that: The connecting member includes a first hook and a second hook. The first hook is arranged on the countersunk hole, and the second hook is arranged on the open-pored foamed ceramic layer. The first hook and the second hook can be locked with each other.

4. The foamed ceramic sound barrier board according to claim 3, characterized in that: The thickness of the closed-cell foamed ceramic layer is 25 mm to 100 mm.

5. The foamed ceramic sound barrier board according to claim 4, characterized in that: The thickness of the open-cell foamed ceramic layer is 25 mm-100 mm.

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