CN210639980U - Inhale sound insulation composite member and transformer - Google Patents
Inhale sound insulation composite member and transformer Download PDFInfo
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- CN210639980U CN210639980U CN201921252615.8U CN201921252615U CN210639980U CN 210639980 U CN210639980 U CN 210639980U CN 201921252615 U CN201921252615 U CN 201921252615U CN 210639980 U CN210639980 U CN 210639980U
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Abstract
The utility model discloses an inhale compound piece of sound insulation and transformer, wherein inhale the compound piece of sound insulation and include: a sound insulation member; and the impedance composite sound absorption assembly is stacked on the sound insulation part and comprises a porous sound absorption unit and a resonance sound absorption unit which are sequentially stacked, wherein the porous sound absorption unit comprises a porous sound absorption layer and a first cavity, and the resonance sound absorption unit comprises a micro-perforated plate and a second cavity. The porous sound absorption unit and the resonance sound absorption unit are arranged, wherein the resonance sound absorption unit has the function of adjusting the sound absorption quantity of the low-frequency band of the porous sound absorption unit, so that the sound absorption coefficient of the low-frequency band can be effectively improved, and the width of the absorption frequency band can be expanded to be matched with the noise characteristic sent by the transformer; along with the increase of the thickness of the first cavity, the wave crest of the sound absorption coefficient curve gradually moves to a low-frequency section, so that low-frequency sound absorption is facilitated; and along with the increase of the thickness of the second cavity, the wave crest of the sound absorption coefficient curve gradually moves to the low frequency band, so that low frequency sound absorption is facilitated.
Description
Technical Field
The utility model relates to a noise pollution prevention and cure technical field, concretely relates to inhale sound insulation composite member and a transformer.
Background
Distribution transformer is numerous, and is nearer apart from the residential block, and the noise uses the low frequency as leading, and the wavelength is big, and the decay is slow, and the penetrability is strong, and is very big to peripheral resident's influence. In order to effectively reduce the influence of the noise of the distribution transformer on the surrounding environment, the installation of the sound absorption and insulation composite piece on the outer side of the oil tank is one of feasible methods.
The sound absorption and insulation composite piece is manufactured by cutting a sound insulation material into a certain specification according to a required size and additionally installing a sound absorption material with a certain thickness on the inner side of the sound absorption and insulation composite piece. When the composite member is applied on site, the sound absorption and insulation composite member is assembled outside the oil tank and connected with the oil tank shell to form a noise reduction shell, so that the noise emitted by the transformer is reduced. The sound absorption material is usually a porous sound absorption material, and has good absorption capacity for medium and high frequency noise, but the low frequency sound absorption coefficient is low and is not matched with the noise characteristics emitted by a transformer, so that the overall noise reduction effect of the sound absorption and insulation composite part is limited, and the popularization and the use are limited.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming the noise characteristic that inhales sound insulation composite and transformer among the prior art and send and unmatched defect to provide an inhale sound insulation composite.
A sound absorbing and insulating composite comprising:
a sound insulation member;
and the impedance composite sound absorption assembly is stacked on the sound insulation piece, the impedance composite sound absorption assembly comprises a porous sound absorption unit and a resonance sound absorption unit which are sequentially stacked, the porous sound absorption unit comprises a porous sound absorption layer and a first cavity, the resonance sound absorption unit comprises a micro-perforated plate and a second cavity, a first connecting piece is connected with the porous sound absorption layer and the sound insulation piece so as to form the porous sound absorption layer between the porous sound absorption layer and the sound insulation piece, the first cavity is formed by the porous sound absorption layer and the micro-perforated plate, and a second connecting piece is connected with the porous sound absorption layer and the micro-perforated plate so as to form the second cavity.
Further, the microperforated panel is the metal sheet, the thickness of microperforated panel is more than or equal to 0.5 millimeter and less than or equal to 1 millimeter, aperture on the microperforated panel is more than or equal to 0.5 millimeter and less than or equal to 1 millimeter, the hole interval on the microperforated panel is more than or equal to 5 millimeters and less than or equal to 15 millimeters.
Further, the porous sound absorption layer is a fiber material layer, wherein the fiber material layer is made of any one of glass wool, rock wool and polyester fiber wool.
Further, the thickness of the fiber material layer is larger than or equal to 1cm and smaller than or equal to 15 cm.
Further, the thickness of the first cavity is greater than or equal to 1cm and less than or equal to 10 cm.
Further, the thickness of the second cavity is greater than or equal to 1cm and less than or equal to 10 cm.
Further, the sound insulation piece is a metal sound insulation plate.
Further, the thickness of the metal sound insulation plate is more than or equal to 0.8 mm and less than or equal to 2 mm.
Further, the first connecting piece and the second connecting piece are both made of square steel.
A transformer, comprising:
a transformer body;
and the sound absorption and insulation composite piece is arranged on the outer side of the transformer main body.
The utility model discloses technical scheme has following advantage:
1. the utility model provides a pair of inhale sound insulation compound piece, include: a sound insulation member; and the impedance composite sound absorption assembly is stacked on the sound insulation piece, the impedance composite sound absorption assembly comprises a porous sound absorption unit and a resonance sound absorption unit which are sequentially stacked, the porous sound absorption unit comprises a porous sound absorption layer and a first cavity, the resonance sound absorption unit comprises a micro-perforated plate and a second cavity, a first connecting piece is connected with the porous sound absorption layer and the sound insulation piece so as to form the porous sound absorption layer between the porous sound absorption layer and the sound insulation piece, the first cavity is formed by the porous sound absorption layer and the micro-perforated plate, and a second connecting piece is connected with the porous sound absorption layer and the micro-perforated plate so as to form the second cavity. The sound absorption and insulation composite part with the structure is provided with the porous sound absorption unit and the resonance sound absorption unit, wherein the resonance sound absorption unit has the function of adjusting the sound absorption capacity of the porous sound absorption unit in the low-frequency band, so that the sound absorption coefficient of the low-frequency band can be effectively improved, the width of the absorption frequency band is expanded, the defect that the low-frequency sound absorption coefficient of a porous sound absorption material is singly used is overcome, and the noise characteristic of the porous sound absorption material is matched with that of a transformer; along with the increase of the thickness of the first cavity, the wave crest of the sound absorption coefficient curve gradually moves to a low-frequency section, so that low-frequency sound absorption is facilitated; and along with the increase of the thickness of the second cavity, the wave crest of the sound absorption coefficient curve gradually moves to the low frequency band, which is beneficial to low frequency sound absorption, but the speed of the second cavity moving to the low frequency band is slightly slower than the speed of the first cavity moving to the low frequency band.
2. The utility model provides a pair of inhale sound insulation composite, the microperforated panel is the metal sheet, the thickness of microperforated panel is more than or equal to 0.5 millimeter and less than or equal to 1 millimeter, the aperture on the microperforated panel is more than or equal to 0.5 millimeter and less than or equal to 1 millimeter, the hole interval on the microperforated panel is more than or equal to 5 millimeters and less than or equal to 15 millimeters. The porous sound absorption layer is a fiber material layer, wherein the fiber material is any one of glass wool, rock wool and polyester fiber wool. The thickness of the fiber material layer is greater than or equal to 1cm and less than or equal to 15 cm. The thickness of the first cavity is larger than or equal to 1cm and smaller than or equal to 10 cm. The thickness of the second cavity is larger than or equal to 1cm and smaller than or equal to 10 cm. The sound insulation piece is a metal sound insulation plate. The thickness of the metal sound insulation plate is more than or equal to 0.8 mm and less than or equal to 2 mm. The sound absorption and insulation composite part with the structure realizes the suppression of different noise frequency bands of the transformer by adjusting the material parameters and the process parameters of the cavity, thereby realizing that the average sound absorption coefficient of 100-500Hz is not lower than 0.65 and the noise reduction coefficient NRC is not lower than 0.75, and meeting the noise reduction requirement of the transformer.
3. The utility model provides a pair of transformer, include: a transformer body; and the sound absorption and insulation composite piece is arranged on the outer side of the transformer main body. The transformer with the structure has all the advantages brought by the sound absorption and insulation composite piece.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a sound absorption and insulation composite provided in an embodiment of the present invention;
FIG. 2 is a schematic structural view showing a sound insulator, a porous sound-absorbing layer and a micro-perforated plate shown in FIG. 1;
description of reference numerals:
1-sound insulation piece, 2-first cavity, 3-porous sound absorption layer, 4-second cavity, 5-micro perforated plate, and 6-sound absorption and insulation composite piece.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Example 1
The utility model provides a transformer, it includes the transformer main part and inhales the compound 6 of sound insulation as shown in figure 1, inhales the compound 6 of sound insulation and sets up in the outside of transformer main part. Specifically, angle iron is welded on the outer side of the outer wall surface of the transformer main body, and the sound absorption and insulation composite piece 6 is fixedly arranged on the angle iron. The sound absorption and insulation composite part 6 comprises a sound insulation part 1 and an impedance composite sound absorption component as shown in figure 2, and the impedance composite sound absorption component is arranged close to the outer side of the transformer main body. Specifically, the sound insulator 1 and the impedance composite sound absorption member may be connected using square steel.
Wherein it can be set: the sound insulator 1 is a metal sound insulating plate such as a steel plate or an aluminum plate, and the thickness of the metal sound insulating plate is 0.8 mm or more and 2 mm or less.
As shown in fig. 1, the impedance composite sound absorption assembly is stacked on the metal sound insulation plate, and specifically comprises a porous sound absorption unit and a resonance sound absorption unit which are sequentially stacked. Wherein the porous sound absorbing unit comprises a porous sound absorbing layer 3 and a first cavity 2 as shown in fig. 2, and the resonant sound absorbing unit comprises a micro perforated plate 5 and a second cavity 4 as shown in fig. 2.
The porous sound absorption layer 3 in the embodiment is a fiber material layer, and the fiber material layer is made of any one of glass wool, rock wool and polyester fiber wool; wherein the fiber material has an areal density of 500g/m or more2And is not more than 2500g/m2And the thickness of the fiber material layer is more than or equal to 1cm and less than or equal to 15 cm.
Wherein the micro-perforated plate 5 is a metal plate, the thickness of the micro-perforated plate 5 is more than or equal to 0.5 mm and less than or equal to 1 mm, the aperture on the micro-perforated plate 5 is more than or equal to 0.5 mm and less than or equal to 1 mm, and the hole pitch on the micro-perforated plate 5 is more than or equal to 5 mm and less than or equal to 15 mm.
Wherein the first connecting piece is connected with the porous sound absorption layer 3 and the metal sound insulation plate to form a first cavity 2 between the three. The first connecting piece is square steel, a first cavity 2 is formed between the porous sound absorption layer 3 and the metal sound insulation plate through the square steel arranged between the porous sound absorption layer and the metal sound insulation plate, and the square steel is arranged between the peripheral edges of the porous sound absorption layer 3 and the metal sound insulation plate and is fixedly connected with the porous sound absorption layer 3 and the metal sound insulation plate respectively. Wherein the thickness of the first cavity 2 is greater than or equal to 1cm and less than or equal to 10 cm.
Wherein the second connector connects the porous sound absorbing layer 3 with the microperforated panel 5 to define a second cavity 4 therebetween. First connecting piece is the square steel, makes between the two to form second cavity 4 through being provided with the square steel between porous sound-absorbing layer 3 and the microperforated panel 5, and the square steel sets up between the circumference border of porous sound-absorbing layer 3 and microperforated panel 5 and respectively with microperforated panel 5 and 3 fixed connection of porous sound-absorbing layer. Wherein the thickness of the second cavity 4 is greater than or equal to 1cm and less than or equal to 10 cm. Note that fig. 1 shows only the positional relationship between the first cavity 2 and the second cavity 4.
In this embodiment, specifically, the following are set: the sound insulation piece 1 is a steel plate with the thickness of 0.8 mm; the micro-perforated plate 5 is a steel micro-perforated plate 5 with the thickness of 0.5 mm, the aperture of 0.8 mm and the hole spacing of 5 mm; the fiber material layer is a glass wool layer with the surface density of 500g/m2And the thickness is 5 cm; thickness of the first cavity 2The degree is 1cm and the thickness of the second cavity 4 is 1 cm.
Example 2
The present embodiment provides a transformer, which includes a transformer main body and a sound absorption and insulation composite 6 as shown in fig. 1, wherein the sound absorption and insulation composite 6 is disposed on the outer side of the transformer main body, and the structure of the sound absorption and insulation composite 6 is the same as that of the sound absorption and insulation composite 6 provided in embodiment 1, but there is a difference between the material and the size of the sound absorption and insulation composite 6 in embodiment 1.
In the present embodiment, the sound insulator 1 is a steel plate having a thickness of 1 mm; the micro-perforated plate 5 is a steel micro-perforated plate 5 with the thickness of 0.8 mm, the aperture of 1 mm and the hole spacing of 5 mm; the fiber material layer is a polyester fiber layer with the surface density of 2000g/m2And the thickness is 5 cm; the thickness of the first cavity 2 is 10cm and the thickness of the second cavity 4 is 10 cm.
Example 3
The present embodiment provides a transformer, which includes a transformer main body and a sound absorption and insulation composite 6 as shown in fig. 1, wherein the sound absorption and insulation composite 6 is disposed on the outer side of the transformer main body, and the structure of the sound absorption and insulation composite 6 is the same as that of the sound absorption and insulation composite 6 provided in embodiment 1, but there is a difference between the material and the size of the sound absorption and insulation composite 6 in embodiment 1.
In the present embodiment, the sound insulator 1 is an aluminum plate having a thickness of 1 mm; the micro-perforated plate 5 is an aluminum micro-perforated plate 5 with the thickness of 0.5 mm, the aperture of 1 mm and the hole spacing of 15 mm; the fiber material layer is a polyester fiber layer, and the surface density of the glass wool layer is 500g/m2And the thickness is 5 cm; the thickness of the first cavity 2 is 5cm and the thickness of the second cavity 4 is 5 cm.
Example 4
The present embodiment provides a transformer, which includes a transformer main body and a sound absorption and insulation composite 6 as shown in fig. 1, wherein the sound absorption and insulation composite 6 is disposed on the outer side of the transformer main body, and the structure of the sound absorption and insulation composite 6 is the same as that of the sound absorption and insulation composite 6 provided in embodiment 1, but there is a difference between the material and the size of the sound absorption and insulation composite 6 in embodiment 1.
In the present embodiment, the sound insulator 1 is a steel plate having a thickness of 1.5 mm; the micro-perforated plate 5 is a steel micro-perforated plate 5 with the thickness of 1 mm, the aperture of 0.83 mm and the hole spacing of 12.5 mm; the fiber material layer is a glass wool layer with the surface density of 1500g/m2And the thickness is 5 cm; the thickness of the first cavity 2 is 7.5cm and the thickness of the second cavity 4 is 7.5 cm.
Comparative example
Test environment for sound absorption: according to the national standard GB/T18696.2-2002 section 2 of the measurement of sound absorption coefficient and sound impedance in an acoustic impedance tube: transfer function method;
test environment for sound insulation: part 3 of acoustic building and building component sound insulation measurement according to national standard GB/T19889.3-2005: laboratory measurements of building component air sound insulation ";
reference object: the sound absorption material is taken as a porous sound absorption material, wherein the porous sound absorption material is specifically set as a reference object by using 10cm glass wool;
comparison object: the absorbing and separating composite pieces in the embodiments 1 to 4 are used as comparison objects;
table 1 shows the sound absorption coefficients of the comparison object and the reference object at different frequencies.
TABLE 1
Table 1 was analyzed and the conclusion was drawn: in the embodiments 1 to 4, the sound absorption coefficient and the noise reduction coefficient NRC at 100-500Hz are both obviously higher than 10cm of glass wool, so that the utility model is beneficial to the noise reduction of medium and low frequencies below 100Hz to 500 Hz; and because the noise of transformer is mainly with the low and medium frequency noise below 500Hz of 100Hz as the fundamental frequency, from this it can be seen that the utility model discloses be favorable to falling of transformer making an uproar.
The utility model discloses a sound absorption and insulation composite part, through being provided with porous sound absorption unit and resonance sound absorption unit, wherein the resonance sound absorption unit adjusts the effect of porous sound absorption unit low frequency channel sound absorption capacity, can effectively improve the sound absorption coefficient of low frequency channel and expand the absorption frequency bandwidth to make up the defect that the low frequency sound absorption coefficient of porous sound absorption material is lower for the matching with the noise characteristic that the transformer sent; along with the increase of the thickness of the first cavity 2, the wave crest of the sound absorption coefficient curve gradually moves to a low-frequency section, so that low-frequency sound absorption is facilitated; and as the thickness of the second cavity 4 increases, the wave crest of the sound absorption coefficient curve gradually moves to the low frequency band, which is beneficial to low frequency sound absorption, but the speed of the second cavity 4 moving to the low frequency band is slightly slower than that of the first cavity 2 moving to the low frequency band. And the suppression of different noise frequency bands of the transformer is realized by adjusting the material parameters and the process parameters of the cavity, so that the average sound absorption coefficient of 100-500Hz is not lower than 0.65, the noise reduction coefficient NRC is not lower than 0.75, and the noise reduction requirement of the transformer can be met.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (10)
1. A sound absorbing and insulating composite, comprising:
a sound insulation member;
and the impedance composite sound absorption assembly is stacked on the sound insulation piece, the impedance composite sound absorption assembly comprises a porous sound absorption unit and a resonance sound absorption unit which are sequentially stacked, the porous sound absorption unit comprises a porous sound absorption layer and a first cavity, the resonance sound absorption unit comprises a micro-perforated plate and a second cavity, a first connecting piece is connected with the porous sound absorption layer and the sound insulation piece so as to form the first cavity, the second connecting piece is connected with the porous sound absorption layer and the micro-perforated plate so as to be arranged between the three, and the second cavity is formed between the three.
2. The sound absorption and insulation composite according to claim 1, wherein the microperforated plate is a metal plate, the thickness of the microperforated plate is 0.5 mm or more and 1 mm or less, the hole diameter of the microperforated plate is 0.5 mm or more and 1 mm or less, and the hole pitch of the microperforated plate is 5 mm or more and 15 mm or less.
3. The sound absorption and insulation composite as claimed in claim 2, wherein the porous sound absorption layer is a fiber material layer, wherein the fiber material layer is made of any one of glass wool, rock wool and polyester fiber wool.
4. The sound absorption and insulation composite as claimed in claim 3, wherein the thickness of the layer of fibrous material is greater than or equal to 1cm and less than or equal to 15 cm.
5. The sound absorption and insulation composite of claim 4, wherein the thickness of the first cavity is greater than or equal to 1cm and less than or equal to 10 cm.
6. The sound absorption and insulation composite as claimed in claim 5, wherein the thickness of the second cavity is greater than or equal to 1cm and less than or equal to 10 cm.
7. The composite member as claimed in any one of claims 1 to 6, wherein the sound-insulating member is a metal sound-insulating plate.
8. The composite sound absorption and insulation member according to claim 7, wherein the metal sound insulation plate has a thickness of 0.8 mm or more and 2 mm or less.
9. The sound absorption and insulation composite piece according to claim 7, wherein the first connecting piece and the second connecting piece are both made of square steel.
10. A transformer, comprising:
a transformer body;
and the sound absorption and insulation composite as claimed in any one of claims 1 to 9, which is disposed outside the transformer body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921252615.8U CN210639980U (en) | 2019-08-02 | 2019-08-02 | Inhale sound insulation composite member and transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921252615.8U CN210639980U (en) | 2019-08-02 | 2019-08-02 | Inhale sound insulation composite member and transformer |
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| CN210639980U true CN210639980U (en) | 2020-05-29 |
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| CN201921252615.8U Active CN210639980U (en) | 2019-08-02 | 2019-08-02 | Inhale sound insulation composite member and transformer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110599991A (en) * | 2019-08-02 | 2019-12-20 | 全球能源互联网研究院有限公司 | Inhale sound insulation composite member and transformer |
| CN111883350A (en) * | 2020-07-21 | 2020-11-03 | 武汉大学 | Transformer substation noise frequency selection suppression device considering temperature factors and frequency selection method |
| CN113096626A (en) * | 2021-03-30 | 2021-07-09 | 南京光声超构材料研究院有限公司 | Silent box |
| CN115635925A (en) * | 2022-12-26 | 2023-01-24 | 质子汽车科技有限公司 | Vehicle cab and vehicle |
-
2019
- 2019-08-02 CN CN201921252615.8U patent/CN210639980U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110599991A (en) * | 2019-08-02 | 2019-12-20 | 全球能源互联网研究院有限公司 | Inhale sound insulation composite member and transformer |
| CN111883350A (en) * | 2020-07-21 | 2020-11-03 | 武汉大学 | Transformer substation noise frequency selection suppression device considering temperature factors and frequency selection method |
| CN111883350B (en) * | 2020-07-21 | 2021-11-05 | 国网河南省电力公司电力科学研究院 | Transformer substation noise frequency selection suppression device considering temperature factors and frequency selection method |
| CN113096626A (en) * | 2021-03-30 | 2021-07-09 | 南京光声超构材料研究院有限公司 | Silent box |
| CN115635925A (en) * | 2022-12-26 | 2023-01-24 | 质子汽车科技有限公司 | Vehicle cab and vehicle |
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