阅读说明：本技术 一种陶瓷纤维吸声构件 (Ceramic fiber sound absorption component ) 是由 王云辉 颜涛 樊超 田一 钱兴韬 聂京凯 朱全军 何强 杨永昆 陈勇 于 2020-05-12 设计创作，主要内容包括：本发明是一种陶瓷纤维吸声构件,该陶瓷纤维吸声构件包括微穿孔板、陶瓷纤维板、背板和侧板,微穿孔板、陶瓷纤维板和背板在水平方向上依次放置,其截面尺寸相同,微穿孔板与陶瓷纤维板紧密贴合,陶瓷纤维板和背板之间设有侧板,陶瓷纤维板和背板分别与侧板紧密贴合；侧板为框体结构,使得陶瓷纤维板与背板之间形成密闭的空腔；微穿孔板、陶瓷纤维板、背板和侧板之间可通过角钢固定连接,形成整体吸声构件。该吸声构件具有优良的防火性能和声学性能,阻燃性可达到A级,100Hz吸声系数可达到0.3以上,还可通过材料参数、结构参数的调整,实现不同噪声频段的抑制,适应不同噪声源的频谱特点。(The invention relates to a ceramic fiber sound absorption member, which comprises a micro-perforated plate, a ceramic fiber plate, a back plate and side plates, wherein the micro-perforated plate, the ceramic fiber plate and the back plate are sequentially arranged in the horizontal direction, the cross section sizes of the micro-perforated plate, the ceramic fiber plate and the back plate are the same, the micro-perforated plate is tightly attached to the ceramic fiber plate, the side plates are arranged between the ceramic fiber plate and the back plate, and the ceramic fiber plate and the back plate are respectively tightly attached to the side plates; the side plate is of a frame structure, so that a closed cavity is formed between the ceramic fiber plate and the back plate; the micro-perforated plate, the ceramic fiber plate, the back plate and the side plate can be fixedly connected through angle steel to form an integral sound absorption member. The sound absorption member has excellent fireproof performance and acoustic performance, the flame retardance can reach A level, the 100Hz sound absorption coefficient can reach more than 0.3, and the suppression of different noise frequency bands can be realized by adjusting material parameters and structural parameters, so that the sound absorption member is suitable for the frequency spectrum characteristics of different noise sources.)

1. A ceramic fiber sound absorbing member characterized by: the integral thickness of the ceramic fiber sound absorption member is 41.8-101.8 mm, and the ceramic fiber sound absorption member comprises a micro-perforated plate, a ceramic fiber plate, a back plate and a side plate; the micro-perforated plate, the ceramic fiber plate and the back plate are sequentially arranged in the horizontal direction, the cross section sizes of the micro-perforated plate, the ceramic fiber plate and the back plate are the same, the micro-perforated plate is tightly attached to the ceramic fiber plate, a side plate is arranged between the ceramic fiber plate and the back plate, and the ceramic fiber plate and the back plate are respectively tightly attached to the side plate; the micro-perforated plate can be made of metal materials, the thickness of the micro-perforated plate is 0.8mm, the hole spacing of the micro-perforated plate is 6.5mm, and the hole diameter of the micro-perforated plate is 0.76 mm; the ceramic fiber board has the thickness of 20-50mm and the volume weight of 80-128kg/m 3; the side plate is of a frame structure and can be made of metal plates, the thickness of the side plate is 1mm, the side plate is hollow, a closed cavity is formed between the ceramic fiber plate and the back plate, and the thickness of the cavity is 20-50 mm; the back plate can be made of metal materials, and the thickness of the back plate is 1 mm; the micro-perforated plate, the ceramic fiber plate, the back plate and the side plate can be fixedly connected through angle steel to form an integral sound absorption member.

2. The sound absorbing member of claim 1, wherein: the thickness of the ceramic fiber board is 20mm, and the volume weight is 80kg/m 3; the thickness of the cavity is 20 mm.

3. The sound absorbing member of claim 1, wherein: the thickness of the ceramic fiber board is 40mm, and the volume weight is 96kg/m 3; the thickness of the cavity is 40 mm.

4. The sound absorbing member of claim 1, wherein: the thickness of the ceramic fiber board is 50mm, and the volume weight is 128kg/m 3; the thickness of the cavity is 50 mm.

5. A sound-absorbing member according to any one of claims 1 to 4, wherein: the micro-perforated plate can be made of a steel plate or an aluminum plate.

6. A sound-absorbing member according to any one of claims 1 to 4, wherein: the back plate can be made of a steel plate or an aluminum plate.

7. A sound-absorbing member according to any one of claims 1 to 4, wherein: the side plates can be made of steel plates or aluminum plates.

Technical Field

The invention relates to the technical field of transformer substation sound absorption barriers, in particular to a ceramic fiber sound absorption member.

Background

The noise of the transformer substation is mainly concentrated in the medium-low frequency band below 500Hz, and a peak value is formed on the power frequency of 100Hz and the frequency doubling band thereof, and from the previous research and treatment experience, the noise contains medium-low frequency noise components and has higher peak noise, the wavelength of noise sound waves is larger, the attenuation is slow along with the distance, the penetrating power to buildings is strong, and the noise is difficult to be effectively eliminated by adopting conventional noise reduction materials. In addition, most of the existing substations are unattended substations, and are exposed in complex and variable natural environments for a long time, so that higher requirements are provided for service reliability of noise reduction materials, and expected noise reduction and fire prevention effects need to be achieved through targeted design.

Currently, the most widely used sound absorbing material on the market is glass wool. The glass wool is a porous sound absorption material, but the glass wool is brittle and easy to break, is easy to damp, basically does not absorb sound after being damped, is easy to age and lose effectiveness, starts to be pulverized and emits tiny dust within 2 to 3 years under certain service conditions, and can seriously pollute the environment within ten years on average. In addition, the glass wool has low sound absorption coefficient of low-frequency noise, and the material thickness is usually required to be increased on the structure if the noise reduction requirement is required, so that the installation and the arrangement have many defects.

The ceramic fiber is a high-temperature resistant fiber and has the characteristics of light volume weight, high temperature resistance, good thermal stability, low thermal conductivity, mechanical vibration resistance, high elasticity, sound insulation, good electrical insulation, good chemical stability and the like. In the application aspect of ceramic fiber, the ceramic fiber is mainly used as a high-temperature furnace filler, a kiln heat-insulating layer and a heat supply network pipeline heat-insulating layer on high-temperature equipment such as smelting furnaces in metallurgy, chemical industry, electric power industry and mechanical industry; in the patent of ceramic fiber, the patents of ceramic fiber are numerous, but mainly focus on the material formulation, preparation process and fireproof product of ceramic fiber, and little research is carried out on the sound absorption performance of ceramic fiber. Therefore, the ceramic fiber sound absorption component for the low-frequency noise of the transformer substation is designed by utilizing the excellent high-temperature resistance and adjustable fiber cotton parameters of the ceramic fiber so as to replace glass cotton with various defects.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a ceramic fiber sound absorption member which is used for solving the problems that the existing noise reduction material is difficult to effectively eliminate noise sound waves with larger wavelength, and has no fireproof effect and the like.

The technical scheme adopted by the invention is as follows:

a ceramic fiber sound absorption member is characterized in that the overall thickness of the ceramic fiber sound absorption member is 41.8-101.8 mm, and the ceramic fiber sound absorption member comprises a micro-perforated plate, a ceramic fiber plate, a back plate and side plates, wherein the micro-perforated plate, the ceramic fiber plate and the back plate are sequentially arranged in the horizontal direction, the cross sections of the micro-perforated plate, the ceramic fiber plate and the back plate are the same in size, the micro-perforated plate is tightly attached to the ceramic fiber plate, the side plates are arranged between the ceramic fiber plate and the back plate, and the ceramic fiber plate and the; the micro-perforated plate can be made of metal materials, the thickness of the micro-perforated plate is 0.8mm, the hole spacing of the micro-perforated plate is 6.5mm, and the hole diameter of the micro-perforated plate is 0.76 mm; the ceramic fiber board has the thickness of 20-50mm and the volume weight of 80-128kg/m 3; the side plate is of a frame structure and can be made of metal plates, the thickness of the side plate is 1mm, the side plate is hollow, a closed cavity is formed between the ceramic fiber plate and the back plate, and the thickness of the cavity is 20-50 m; the back plate can be made of metal materials, and the thickness of the back plate is 1 mm; the micro-perforated plate, the ceramic fiber plate, the back plate and the side plate can be fixedly connected through angle steel to form an integral sound absorption member.

The thickness of the ceramic fiber board is 20mm, and the volume weight is 80kg/m 3; the thickness of the cavity is 20 mm.

The thickness of the ceramic fiber board is 40mm, and the volume weight is 96kg/m 3; the thickness of the cavity is 40 mm.

The thickness of the ceramic fiber board is 50mm, and the volume weight is 128kg/m 3; the thickness of the cavity is 50 mm.

The micro-perforated plate can be made of a steel plate or an aluminum plate.

The back plate can be made of a steel plate or an aluminum plate.

The side plates can be made of steel plates or aluminum plates.

The invention has the beneficial effects that:

1. compared with the prior art, the acoustic performance of the invention is adjustable, different noise frequency band suppression can be realized by adjusting material parameters and structure parameters, the invention is suitable for the frequency spectrum characteristics of different noise sources, and the sound absorption coefficient is kept stable after the peak value without obvious wave trough. The sound absorption coefficient of 100Hz can be adjusted to be not less than 0.30, and the noise reduction coefficient is not less than 0.90.

2. Compared with the prior art, the flame-retardant coating has good fireproof performance, flame retardance reaching A level, stable performance and acoustic performance retention rate not lower than 90% after salt spray test, aging test, rain test and sand test.

3. The invention has good mechanical property, good strength and rigidity, enough toughness and difficult deformation.

4. The preparation process is simple and has no additive.

5. The invention has good environmental protection property, and the used materials are all environment-friendly materials, are non-volatile, do not pulverize, and do not pollute the environment.

6. The invention has low cost.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural diagram of a micro-perforated plate, a ceramic fiber plate, a back plate and a side plate according to the present invention;

FIG. 3 is a graph of the acoustic absorption coefficient of the embodiment;

figure 4 is a graph comparing the sound absorption coefficient of ceramic fiber sound absorbing members with polyester fibers and glass wool, which are common sound absorbing materials.

In fig. 1-2, 1 is a microperforated panel, 2 is a ceramic fiber panel, 3 is a cavity, 4 is a back panel, 5 is a side panel, and 6 is a ceramic fiber sound-absorbing member.

In fig. 3, 1 is the sound absorption coefficient of example 1, 2 is the sound absorption coefficient of example 2, and 3 is the sound absorption coefficient of example 3.

In fig. 4, 1 is a ceramic fiber sound absorbing member, 2 is a polyester fiber sound absorbing material, and 3 is a glass wool sound absorbing material.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.

As shown in fig. 1-2, the present invention is a ceramic fiber sound-absorbing member, the overall thickness of the ceramic fiber sound-absorbing member 6 is 41.8-101.8 mm, and the ceramic fiber sound-absorbing member includes a micro-perforated plate 1, a ceramic fiber plate 2, a back plate 4 and a side plate 5, the micro-perforated plate 1, the ceramic fiber plate 2 and the back plate 4 are sequentially placed in the horizontal direction, the cross-sectional dimensions thereof are the same, the micro-perforated plate 1 is closely attached to the ceramic fiber plate 2, the side plate 5 is disposed between the ceramic fiber plate 2 and the back plate 4, and the ceramic fiber plate 2 and the back plate 4 are closely attached to the side plate 5; the micro-perforated plate 1 can be made of metal materials, the thickness of the micro-perforated plate is 0.8mm, the hole spacing of the micro-perforated plate is 6.5mm, and the hole diameter of the micro-perforated plate is 0.76 mm; the thickness of the ceramic fiber board 2 is 20-50mm, and the volume weight of the ceramic fiber board is 80-128kg/m 3; the side plate 5 is of a frame structure and can be made of metal plates, the thickness of the side plate is 1mm, the interior of the side plate is hollow, a closed cavity 3 is formed between the ceramic fiber plate 2 and the back plate 4, and the thickness of the cavity 3 is 20-50 mm; the back plate 4 can be made of metal materials, and the thickness of the back plate is 1 mm; the micro-perforated plate 1, the ceramic fiber plate 2, the back plate 4 and the side plate 5 can be fixedly connected through angle steel to form an integral sound absorption member 6.

As shown in fig. 3, example 1, when the ceramic fiber sound-absorbing member 6 had an overall thickness of 41.8 mm; the thickness of the micro-perforated plate 1 is 0.8mm, the hole spacing is 6.5mm, and the hole diameter is 0.76 mm; the thickness of the ceramic fiber board 2 is 20mm, and the volume weight is 80kg/m 3; the thickness of the back plate 4 is 1 mm; the thickness of the side plate 5 is 1 mm; when the thickness of the cavity 3 is 20mm, the sound absorption member 6 can enable the sound absorption coefficient of 100Hz low frequency to reach 0.24, and the noise reduction coefficient to reach 0.85.