CN216957433U - Inside and outside all can ventilated wide band noise elimination post - Google Patents
Inside and outside all can ventilated wide band noise elimination post Download PDFInfo
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- CN216957433U CN216957433U CN202123328187.2U CN202123328187U CN216957433U CN 216957433 U CN216957433 U CN 216957433U CN 202123328187 U CN202123328187 U CN 202123328187U CN 216957433 U CN216957433 U CN 216957433U
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Abstract
The utility model discloses a broadband noise elimination column with ventilation inside and outside, which is a hollow column surrounded by four metamaterial noise elimination units in a two-by-two connection manner, wherein one end of the noise elimination column is provided with a wind guide wedge, an inner hole of the noise elimination column forms an airflow channel, the outer side edges of two adjacent metamaterial noise elimination units are connected to form a triangular cavity, the inside of the triangular cavity is filled with a porous sound absorption material, each metamaterial noise elimination unit consists of an inner and an outer double-layer noise elimination structures, and each double-layer noise elimination structure comprises an outer layer noise elimination structure and an inner layer noise elimination structure; a back cavity is formed between the outer layer silencing structure and the inner layer silencing structure. The air flow channel is formed in the silencing column, so that the minimum width of the air flow channel can be reduced, the upper limit cut-off frequency is improved, enough silencing quantity can be obtained in a wider frequency band range, the ventilation area is increased, resistance loss caused by overlarge flow speed is reduced, the ventilation effect is good, the air exhaust efficiency of equipment is ensured, the energy consumption is reduced, the weight is light, and the cost is low.
Description
Technical Field
The utility model relates to the technical field of noise elimination and reduction, in particular to a broadband noise elimination column with ventilation inside and outside.
Background
For the silencing columns with a certain distance, when the frequency of incident sound waves is up to a certain limit, the corresponding sound wave wavelength is shorter than the distance between the silencing columns, the sound waves are transmitted along the distance in a narrow beam form and do not or rarely act on the sound absorption surface on the surface of the silencing column, and therefore the silencing quantity of the silencing device is obviously reduced. The frequency at which this phenomenon occurs is defined as the upper cut-off frequency, also referred to as the high frequency failure frequency. The higher the upper cut-off frequency, the higher the amount of noise cancellation.
The sound-absorbing columns of the conventional array type sound-absorbing device are usually of a solid structure, so that the distance between the sound-absorbing columns is usually larger and is not easy to reduce, because the noise-absorbing quantity can be increased by reducing the distance between the sound-absorbing columns, but resistance loss is increased due to the increase of the flow speed.
And solid noise elimination post structure ventilation effect is very poor, still can influence the efficiency of airing exhaust of equipment, increases the energy consumption of equipment, and solid structure's noise elimination post is moreover, and the consumptive material is many, and weight is big, and is with high costs.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects and shortcomings in the prior art, the utility model provides the broadband muffling column which is made into a hollow column structure in a city surrounded by four metamaterial muffling units connected in pairs, so that an airflow channel is formed in the muffling column, the minimum width of the airflow channel can be reduced, the upper limit cut-off frequency is improved, a sufficient muffling amount can be obtained in a wider frequency band range, the ventilation area is increased, the resistance loss caused by overlarge flow velocity is reduced, the ventilation effect is good, the exhaust efficiency of equipment can be ensured to the maximum extent, the energy consumption is reduced, the material consumption is low, the weight is light, and the cost is low.
The technical scheme of the utility model is as follows: a broadband noise elimination column with ventilation inside and outside is a hollow column formed by connecting four metamaterial noise elimination units in a two-by-two manner in a city surrounding manner, one end of the noise elimination column is provided with a wind guide wedge, an inner hole of the noise elimination column forms an air flow channel, the outer side edges of two adjacent metamaterial noise elimination units are connected to form a triangular cavity, a porous sound absorption material is filled in the triangular cavity, each metamaterial noise elimination unit consists of an inner double-layer noise elimination structure and an outer double-layer noise elimination structure, and each double-layer noise elimination structure comprises an outer layer noise elimination structure and an inner layer noise elimination structure; and a back cavity is formed between the outer layer silencing structure and the inner layer silencing structure.
The silencing column is made into a hollow column structure in which four metamaterial silencing units are connected in pairs to form a surrounding city, so that an airflow channel is formed in the silencing column, the minimum width of the airflow channel can be reduced, the upper limit cut-off frequency is improved, sufficient silencing quantity can be obtained in a wider frequency band range, meanwhile, the ventilation area is increased, resistance loss caused by overlarge flow velocity is reduced, the ventilation effect is good, the air exhaust efficiency of equipment can be ensured to the maximum extent, the energy consumption is reduced, fewer materials are consumed, the weight is light, the cost is low, the triangular cavity structure further reduces airflow resistance, and the triangular cavity is filled with porous sound absorption materials to improve the high-frequency silencing effect.
Preferably, outer noise-abatement structure includes the outer perforated plate of inside and outside both sides and connects the outer framed panel of two outer perforated plates, inner noise-abatement structure includes a plurality of U type rectangular pipes, connects the inside casing chain joint board of a plurality of U type rectangular pipes, seals the head rectangular member of inside casing chain joint board and connects the interior perforated plate in inside casing chain joint board one side, connect through four corners between outer noise-abatement structure and the inner noise-abatement structure.
The outer-layer silencing structure and the inner-layer silencing structure of the metamaterial silencing unit with the structure both adopt metamaterial silencing structures and mainly perform silencing on a low-frequency section.
Preferably, the outer layer noise elimination structure comprises outer perforated plates on the inner side and the outer side and an outer frame plate connecting the two outer perforated plates, and the inner layer noise elimination structure is made of porous sound absorption materials filled in the outer layer noise elimination structure.
The outer layer noise elimination structure of the metamaterial noise elimination unit with the structure adopts a metamaterial noise elimination structure, and the inner layer noise elimination structure adopts a conventional noise elimination material, so that noise can be eliminated for low-frequency bands and medium-high frequency bands.
Preferably, outer noise-abatement structure includes the porous sound absorbing material of inside and outside both sides and connects two porous sound absorbing material's outer deckle board, inner noise-abatement structure includes a plurality of U type rectangular pipes, connects the inside casing chain link board of a plurality of U type rectangular pipes, seals the head rectangular member of inside casing chain link board and connects the interior perforated plate in inside casing chain link board one side, connect through four corners between outer noise-abatement structure and the inner noise-abatement structure.
The outer-layer silencing structure of the metamaterial silencing unit with the structure adopts conventional silencing materials, and the inner-layer silencing structure adopts a metamaterial silencing structure, so that the metamaterial silencing unit can be used for silencing a low-frequency band and a medium-high frequency band.
Preferably, the outer layer noise-eliminating structure comprises porous sound-absorbing materials on the inner side and the outer side and an outer frame plate for connecting the two porous sound-absorbing materials, and the inner layer noise-eliminating structure is a perforated plate arranged in the middle of the outer frame plate.
The outer-layer silencing structure of the metamaterial silencing unit with the structure adopts conventional silencing materials, and the inner-layer silencing structure adopts a metamaterial silencing structure, so that the metamaterial silencing unit can be used for silencing a low-frequency band and a medium-high frequency band.
Preferably, the outer layer sound-absorbing structure and the inner layer sound-absorbing structure are made of steel plates, aluminum alloy plates, stainless steel plates or plastic plates.
Preferably, the four metamaterial noise elimination units are connected in pairs through quick-connection buckles or angle iron columns.
The structure ensures the connection convenience and firmness among the metamaterial noise elimination units, thereby ensuring the strength of the noise elimination column.
The noise elimination column is made into a hollow column structure in which four metamaterial noise elimination units are connected in pairs to form a surrounding, so that an airflow channel is formed in the noise elimination column, the minimum width of the airflow channel can be reduced, the upper limit cut-off frequency is improved, sufficient noise elimination quantity can be obtained in a wider frequency band range, meanwhile, the ventilation area is increased, resistance loss caused by overlarge flow speed is reduced, the ventilation effect is good, the air exhaust efficiency of equipment can be ensured to the maximum extent, the energy consumption is reduced, fewer consumables and light weight are used, the cost is low, high-performance noise elimination is realized, the ventilation effect is good, the air exhaust efficiency of the equipment can be ensured to the maximum extent, the energy consumption is reduced, fewer consumables and light weight are used, the cost is low, the triangular cavity structure further reduces the airflow resistance, and the porous sound absorption material is filled in the triangular cavity to improve the high-frequency noise elimination effect.
Drawings
FIG. 1 is a schematic structural view of example 1 of the present invention;
FIG. 2 is a schematic structural view of the metamaterial noise elimination unit in embodiment 1 of the present invention after removing an outer perforated plate and one of the U-shaped rectangular tubes on one side thereof;
FIG. 3 is a schematic vertical sectional view of embodiment 2 of the present invention;
FIG. 4 is a schematic cross-sectional view of example 2 of the present invention;
in the figure, 1, a metamaterial noise elimination unit, 2, an outer perforated plate, 3, an inner perforated plate, 4, an outer frame plate, 5, a U-shaped rectangular pipe, 6, an inner frame link plate, 7, an end socket rectangular material, 8, a corner, 9, a wind guide wedge, 10, an angle iron column, 11, a porous sound absorption material, 12, a triangular cavity and 13 are airflow channels.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples, but the scope of the present invention is not limited thereto.
Example 1
As shown in fig. 1 and 2, the broadband noise elimination column capable of ventilating both inside and outside is a hollow column surrounded by four metamaterial noise elimination units 1 connected in pairs, one end of the noise elimination column is provided with a wind guide wedge 9, an inner hole of the noise elimination column forms an air flow channel 13, the metamaterial noise elimination unit 1 is composed of an inner double-layer noise elimination structure and an outer double-layer noise elimination structure, and the double-layer noise elimination structure comprises an outer layer noise elimination structure and an inner layer noise elimination structure; a back cavity is formed between the outer layer silencing structure and the inner layer silencing structure. The outer layer noise elimination structure comprises outer perforated plates 2 on the inner side and the outer side and outer frame plates 4 connecting the two outer perforated plates 2, the inner layer noise elimination structure comprises a plurality of U-shaped rectangular pipes 5, inner frame link plates 6 connecting the U-shaped rectangular pipes 5, end socket rectangular materials 7 sealing the inner frame link plates 6 and inner perforated plates 3 connected to one sides of the inner frame link plates 6, and the outer layer noise elimination structure and the inner layer noise elimination structure are connected through four corners 8. The outer layer silencing structure and the inner layer silencing structure are made of steel plates, aluminum alloy plates, stainless steel plates or plastic plates. The four metamaterial noise elimination units 1 are connected in pairs through angle iron columns 10.
Example 2
As shown in fig. 3 and 4, the outer layer sound-absorbing structure includes outer perforated plates 2 at the inner and outer sides and an outer frame plate 4 connecting the two outer perforated plates 2, and the inner layer sound-absorbing structure is a porous sound-absorbing material 11 filled in the outer layer sound-absorbing structure. The outer sides of two adjacent metamaterial noise elimination units are connected to form a triangular cavity 12, and porous sound absorption materials are filled in the triangular cavity 12.
Example 3
Outer noise-abatement structure includes the porous sound absorbing material of inside and outside both sides and connects two porous sound absorbing material's outer deckle board, inner noise-abatement structure includes a plurality of U type rectangular pipes, connects the inside casing chain link board of a plurality of U type rectangular pipes, seals the head rectangular member of inside casing chain link board and connects the interior perforated plate in inside casing chain link board one side, connect through four corners between outer noise-abatement structure and the inner noise-abatement structure.
Example 4
The outer layer silencing structure comprises porous sound-absorbing materials on the inner side and the outer side and an outer frame plate for connecting the two porous sound-absorbing materials, and the inner layer silencing structure is a perforated plate arranged in the middle of the outer frame plate.
The porous sound-absorbing material in the present invention refers to some conventional porous sound-absorbing materials.
Claims (7)
1. The utility model provides an all can ventilated wide band noise elimination post inside and outside which characterized in that: the air guide wedge is arranged at one end of each sound attenuation column, an air flow channel is formed in an inner hole of each sound attenuation column, the outer side edges of every two adjacent sound attenuation units are connected to form a triangular cavity, porous sound absorption materials are filled in the triangular cavity, each sound attenuation unit is composed of an inner double-layer sound attenuation structure and an outer double-layer sound attenuation structure, and each double-layer sound attenuation structure comprises an outer layer sound attenuation structure and an inner layer sound attenuation structure; and a back cavity is formed between the outer layer silencing structure and the inner layer silencing structure.
2. The broadband sound-absorbing column as claimed in claim 1, wherein: outer noise-abatement structure includes the outer orifice plate of wearing the orifice plate outside inside and outside both sides and connects the outer framed panel of two outer orifice plates, inlayer noise-abatement structure includes a plurality of U type rectangular pipes, connects the inside casing chain joint board of a plurality of U type rectangular pipes, seals the head rectangular member of inside casing chain joint board and connects the interior perforated plate in inside casing chain joint board one side, connect through four corners between outer noise-abatement structure and the inlayer noise-abatement structure.
3. The internally and externally ventilated broadband sound damping column according to claim 1, wherein: the outer layer noise elimination structure comprises outer perforated plates on the inner side and the outer side and an outer frame plate connecting the two outer perforated plates, and the inner layer noise elimination structure is made of porous sound absorption materials filled in the outer layer noise elimination structure.
4. The broadband sound-absorbing column as claimed in claim 1, wherein: outer noise-abatement structure includes the porous sound absorbing material of inside and outside both sides and connects two porous sound absorbing material's outer deckle board, inner noise-abatement structure includes a plurality of U type rectangular pipes, connects the inside casing chain link board of a plurality of U type rectangular pipes, seals the head rectangular member of inside casing chain link board and connects the interior perforated plate in inside casing chain link board one side, connect through four corners between outer noise-abatement structure and the inner noise-abatement structure.
5. The internally and externally ventilated broadband sound damping column according to claim 1, wherein: the outer layer noise elimination structure comprises porous sound absorption materials on the inner side and the outer side and an outer frame plate for connecting the two porous sound absorption materials, and the inner layer noise elimination structure is a perforated plate arranged in the middle of the outer frame plate.
6. The broadband sound-damping column according to any one of claims 2 to 5, wherein: the outer layer silencing structure and the inner layer silencing structure are made of steel plates, aluminum alloy plates, stainless steel plates or plastic plates.
7. The broadband sound-absorbing column as claimed in claim 1, wherein: the four metamaterial noise elimination units are connected in pairs through quick-connection buckles or angle iron columns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123328187.2U CN216957433U (en) | 2021-12-27 | 2021-12-27 | Inside and outside all can ventilated wide band noise elimination post |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123328187.2U CN216957433U (en) | 2021-12-27 | 2021-12-27 | Inside and outside all can ventilated wide band noise elimination post |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216957433U true CN216957433U (en) | 2022-07-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123328187.2U Active CN216957433U (en) | 2021-12-27 | 2021-12-27 | Inside and outside all can ventilated wide band noise elimination post |
Country Status (1)
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| CN (1) | CN216957433U (en) |
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2021
- 2021-12-27 CN CN202123328187.2U patent/CN216957433U/en active Active
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