CN204356925U - A kind of indoor substation low frequency absorption denoising device - Google Patents
A kind of indoor substation low frequency absorption denoising device Download PDFInfo
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- CN204356925U CN204356925U CN201420798331.XU CN201420798331U CN204356925U CN 204356925 U CN204356925 U CN 204356925U CN 201420798331 U CN201420798331 U CN 201420798331U CN 204356925 U CN204356925 U CN 204356925U
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Abstract
本实用新型涉及一种户内变电站用低频吸声降噪装置。其包括低频吸声降噪板，该低频吸声降噪板由依次由外向内装配的低频穿孔吸声板、玻纤布、高密度硅酸铝吸声棉、阻尼板、闭孔式低频吸声泡沫结构、共振吸声板，各层复合构成；低频吸声降噪板整体装配在连接件上，其通过连接件装配在墙体上，在低频吸声降噪板到连接件与墙体安装部位之间设置有间隙，该间隙保证低频吸声降噪板和墙体之间有合理的共振空腔。本实用新型由于不同吸声系数和声阻抗复合结构的使用，该结构的吸声频带较宽，特别是极大的提高了500Hz以下低频的吸声系数，运用于户内变电站的室内，能极大的降低由于室内噪声反射产生的混响声，现场实测降低室内噪声达到12dB（A）以上。
The utility model relates to a low-frequency sound-absorbing and noise-reducing device for an indoor substation. It includes a low-frequency sound-absorbing and noise-reducing panel, which is composed of low-frequency perforated sound-absorbing panels, glass fiber cloth, high-density aluminum silicate sound-absorbing cotton, damping panels, and closed-cell low-frequency absorbing panels assembled from outside to inside. Acoustic foam structure, resonant sound-absorbing board, composite composition of each layer; the low-frequency sound-absorbing and noise-reducing board is integrally assembled on the connector, which is assembled on the wall through the connector, and the low-frequency sound-absorbing and noise-reducing board is connected to the connector and the wall There is a gap between the installation parts, and the gap ensures a reasonable resonance cavity between the low-frequency sound-absorbing and noise-reducing board and the wall. Due to the use of composite structures with different sound absorption coefficients and acoustic impedances, the utility model has a wider sound absorption frequency band, especially greatly improves the sound absorption coefficient of low frequencies below 500 Hz, and can be used in indoor substations. Greatly reduce the reverberation sound caused by indoor noise reflection, and the field measurement reduces indoor noise to more than 12dB(A).
Description
技术领域 technical field
本实用新型涉及工业领域噪声控制和环境保护领域，具体涉及一种户内变电站用低频吸声降噪装置。 The utility model relates to the fields of noise control and environmental protection in the industrial field, in particular to a low-frequency sound-absorbing and noise-reducing device for an indoor substation.
背景技术 Background technique
随着人们生活水平的提高，人们对电力的需求越来越多，城市变电站大量建设在居民区附近，变电站噪声不可避免影响着人们的生活和工作。户内变电站的墙体和屋面一般采用混凝土或者砌块砖，属于噪声反射体，在室内形成强烈的混响声，引起噪声的增加，严重损害变电站内操作人员的听力健康。传统的吸声结构在中高频具有较好的吸声效果，但是在低频段吸声效果较差。而变电站内变压器的噪声在中低频段声压级较高，正好位于传统吸声材料的的吸声短板处。 With the improvement of people's living standards, people's demand for electricity is increasing. A large number of urban substations are built near residential areas. The noise of substations inevitably affects people's life and work. The walls and roofs of indoor substations are generally made of concrete or block bricks, which are noise reflectors and form a strong reverberation sound indoors, causing an increase in noise and seriously damaging the hearing health of operators in the substation. The traditional sound-absorbing structure has a good sound-absorbing effect in the middle and high frequencies, but the sound-absorbing effect is poor in the low-frequency band. The noise of the transformer in the substation has a higher sound pressure level in the middle and low frequency bands, which is just located at the short board of the traditional sound-absorbing material.
实用新型内容 Utility model content
本实用新型的目的就在于提供一种户内变电站用低频吸声降噪装置，其针对上述现有技术的不足，本实用新型采用多孔吸声材料、空腔共振吸声结构、薄板共振吸声材料组成的多层复合吸声结构，并且结构中增加了阻尼板。由于不同吸声系数和声阻抗复合结构的使用，该结构的吸声频带较宽，特别是极大的提高了500Hz以下低频的吸声系数，运用于户内变电站的室内，能极大的降低由于室内噪声反射产生的混响声，现场实测降低室内噪声达到12dB（A）以上。 The purpose of this utility model is to provide a low-frequency sound-absorbing and noise-reducing device for indoor substations. For the deficiencies in the prior art, the utility model adopts porous sound-absorbing materials, cavity resonance sound-absorbing structures, thin-plate resonance sound It is a multi-layer composite sound-absorbing structure composed of materials, and a damping plate is added to the structure. Due to the use of composite structures with different sound absorption coefficients and acoustic impedances, the sound absorption frequency band of this structure is wider, especially the sound absorption coefficient of low frequencies below 500 Hz is greatly improved, and it can be used in indoor substations, which can greatly reduce Due to the reverberation sound generated by indoor noise reflection, the on-site measurement reduces indoor noise to more than 12dB(A).
本实用新型的技术方案为：本实用新型户内变电站用低频吸声降噪装置包括低频吸声降噪板，该低频吸声降噪板由依次由外向内装配的低频穿孔吸声板、玻纤布、高密度硅酸铝吸声棉、阻尼板、闭孔式低频吸声泡沫结构、共振吸声板，各层复合构成；低频吸声降噪板整体装配在连接件上，其通过连接件装配在墙体上，在低频吸声降噪板到连接件与墙体安装部位之间设置有间隙，该间隙保证低频吸声降噪板和墙体之间有合理的共振空腔。 The technical scheme of the utility model is: the low-frequency sound-absorbing and noise-reducing device for indoor substations of the utility model includes a low-frequency sound-absorbing and noise-reducing board, which consists of a low-frequency perforated sound-absorbing board, a glass Fiber cloth, high-density aluminum silicate sound-absorbing cotton, damping board, closed-cell low-frequency sound-absorbing foam structure, resonant sound-absorbing board, each layer is composite; the low-frequency sound-absorbing and noise-reducing board is integrally assembled on the connecting piece, which The parts are assembled on the wall, and there is a gap between the low-frequency sound-absorbing and noise-reducing board, the connecting piece and the installation part of the wall. The gap ensures a reasonable resonance cavity between the low-frequency sound-absorbing and noise-reducing board and the wall.
本实用新型所述低频穿孔吸声板设置为1-0.8mm厚；阻尼板设置为4-5mm；共振吸声板设置为6-10mm厚；低频吸声降噪板到连接件与墙体安装部位之间设置的间隙在50±5mm；高密度硅酸铝吸声棉设置为50mm厚，闭孔式低频吸声泡沫结构设置为50mm厚。 The low-frequency perforated sound-absorbing plate described in the utility model is set to be 1-0.8mm thick; the damping plate is set to be 4-5mm thick; the resonant sound-absorbing plate is set to be 6-10mm thick; The gap between the parts is 50±5mm; the high-density aluminum silicate sound-absorbing cotton is set to 50mm thick, and the closed-cell low-frequency sound-absorbing foam structure is set to 50mm thick.
本实用新型有益效果如下：本实用新型采用多孔吸声材料、空腔共振吸声结构、薄板共振吸声材料组成的多层复合吸声结构，并且结构中增加了阻尼板。由于不同吸声系数和声阻抗复合结构的使用，该结构的吸声频带较宽，特别是极大的提高了500Hz以下低频的吸声系数，运用于户内变电站的室内，能极大的降低由于室内噪声反射产生的混响声，现场实测降低室内噪声达到12dB（A）以上。 The beneficial effects of the utility model are as follows: the utility model adopts a multi-layer composite sound-absorbing structure composed of porous sound-absorbing material, cavity resonance sound-absorbing structure and thin-plate resonance sound-absorbing material, and a damping plate is added in the structure. Due to the use of composite structures with different sound absorption coefficients and acoustic impedances, the sound absorption frequency band of this structure is wider, especially the sound absorption coefficient of low frequencies below 500 Hz is greatly improved, and it can be used in indoor substations, which can greatly reduce Due to the reverberation sound generated by indoor noise reflection, the on-site measurement reduces indoor noise to more than 12dB(A).
附图说明 Description of drawings
图1为本实用新型实施例在墙体上安装的结构示意图。 Fig. 1 is a structural schematic diagram of an embodiment of the utility model installed on a wall.
附图中：1-0.8mm厚低频穿孔吸声板；2-玻纤布；3-高密度硅酸铝吸声棉；4-5mm厚阻尼板；5-闭孔式低频吸声泡沫结构；6-10mm厚共振吸声板；7-共振空腔；8-连接件；9-膨胀螺栓；10-墙体。 In the drawings: 1-0.8mm thick low-frequency perforated sound-absorbing board; 2-glass fiber cloth; 3-high-density aluminum silicate sound-absorbing cotton; 4-5mm thick damping plate; 5-closed-cell low-frequency sound-absorbing foam structure; 6-10mm thick resonant sound-absorbing board; 7-resonant cavity; 8-connector; 9-expansion bolt; 10-wall.
具体实施方式 Detailed ways
如附图1所示本实用新型户内变电站用低频吸声降噪装置的实施例：其连接件8采用膨胀螺栓9与墙体10连接固定，为低频吸声降噪板提供稳固的支撑结构。10mm厚共振吸声板6与墙体10间留置50mm共振空腔7安装。10mm厚共振吸声板6外安装闭孔式低频吸声泡沫结构5和高密度硅酸铝吸声棉3。闭孔式低频吸声泡沫结构5和高密度硅酸铝吸声棉3间安装一层5mm厚阻尼板4。低频吸声降噪板的最外层安装0.8mm厚低频穿孔吸声板1，低频穿孔吸声板内贴玻纤布2，以防止高密度硅酸铝吸声棉3从孔洞漏出。 As shown in Figure 1, the embodiment of the low-frequency sound-absorbing and noise-reducing device for indoor substations of the present invention: the connector 8 is connected and fixed with the wall 10 by expansion bolts 9, providing a stable support structure for the low-frequency sound-absorbing and noise-reducing board . A 50mm resonant cavity 7 is left between the 10mm thick resonant sound-absorbing board 6 and the wall 10 for installation. The 10mm thick resonant sound-absorbing board 6 is equipped with a closed-cell low-frequency sound-absorbing foam structure 5 and high-density aluminum silicate sound-absorbing cotton 3 . A layer of 5mm thick damping board 4 is installed between the closed-cell low-frequency sound-absorbing foam structure 5 and the high-density aluminum silicate sound-absorbing cotton 3 . The outermost layer of the low-frequency sound-absorbing and noise-reducing board is installed with a 0.8mm thick low-frequency perforated sound-absorbing board 1, and the low-frequency perforated sound-absorbing board is pasted with glass fiber cloth 2 to prevent the high-density aluminum silicate sound-absorbing cotton 3 from leaking out of the holes.
本实用新型在实施时所述低频穿孔吸声板可设置为1-0.8mm厚；阻尼板设置为4-5mm；共振吸声板设置为6-10mm厚；低频吸声降噪板到连接件与墙体安装部位之间设置的间隙在50±5mm mm；高密度硅酸铝吸声棉设置为50mm厚，闭孔式低频吸声泡沫结构设置为50mm厚。 When the utility model is implemented, the low-frequency perforated sound-absorbing plate can be set to 1-0.8mm thick; the damping plate is set to 4-5mm thick; the resonant sound-absorbing plate is set to 6-10mm thick; The gap between the installation part and the wall is 50±5mm; the high-density aluminum silicate sound-absorbing cotton is set to 50mm thick, and the closed-cell low-frequency sound-absorbing foam structure is set to 50mm thick.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429012A (en) * | 2015-11-06 | 2016-03-23 | 国网吉林省电力有限公司电力科学研究院 | Noise reduction device for reducing low-frequency noises of transformer station based on foam aluminium alloy |
| CN106531142A (en) * | 2016-10-20 | 2017-03-22 | 中国电力科学研究院 | Noise-reducing device for transformer substation |
| CN107237414A (en) * | 2017-07-28 | 2017-10-10 | 国网河南省电力公司 | A kind of microporous aluminosilicates fiber sandwich sound-absorbing composite board |
| CN108457393A (en) * | 2017-02-17 | 2018-08-28 | S.I.Pan公司 | Anechoic room sound-absorption structural body and the anechoic room for including anechoic room sound-absorption structural body |
| CN108532791A (en) * | 2018-06-15 | 2018-09-14 | 苏州岸肯电子科技有限公司 | A kind of sound-absorbing wall |
| CN108952051A (en) * | 2018-09-25 | 2018-12-07 | 烟台常春藤建筑节能科技有限公司 | A kind of composite decoration integration denoising device and its installation method |
| CN110588683A (en) * | 2019-08-16 | 2019-12-20 | 哈工大机电工程(嘉善)研究院 | Composite board for low-frequency broadband noise reduction of compartment structure |
-
2014
- 2014-12-17 CN CN201420798331.XU patent/CN204356925U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429012A (en) * | 2015-11-06 | 2016-03-23 | 国网吉林省电力有限公司电力科学研究院 | Noise reduction device for reducing low-frequency noises of transformer station based on foam aluminium alloy |
| CN106531142A (en) * | 2016-10-20 | 2017-03-22 | 中国电力科学研究院 | Noise-reducing device for transformer substation |
| CN108457393A (en) * | 2017-02-17 | 2018-08-28 | S.I.Pan公司 | Anechoic room sound-absorption structural body and the anechoic room for including anechoic room sound-absorption structural body |
| US10510331B2 (en) | 2017-02-17 | 2019-12-17 | S.I.Pan | Sound absorbing structure for anechoic chamber and anechoic chamber including the same |
| CN107237414A (en) * | 2017-07-28 | 2017-10-10 | 国网河南省电力公司 | A kind of microporous aluminosilicates fiber sandwich sound-absorbing composite board |
| CN108532791A (en) * | 2018-06-15 | 2018-09-14 | 苏州岸肯电子科技有限公司 | A kind of sound-absorbing wall |
| CN108952051A (en) * | 2018-09-25 | 2018-12-07 | 烟台常春藤建筑节能科技有限公司 | A kind of composite decoration integration denoising device and its installation method |
| CN110588683A (en) * | 2019-08-16 | 2019-12-20 | 哈工大机电工程(嘉善)研究院 | Composite board for low-frequency broadband noise reduction of compartment structure |
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