CN215725256U - Wedge-shaped silencing cylinder - Google Patents
Wedge-shaped silencing cylinder Download PDFInfo
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- CN215725256U CN215725256U CN202121330168.0U CN202121330168U CN215725256U CN 215725256 U CN215725256 U CN 215725256U CN 202121330168 U CN202121330168 U CN 202121330168U CN 215725256 U CN215725256 U CN 215725256U
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Abstract
The utility model provides a wedge-shaped silencing pot, which comprises: a framework; the wedge type sound absorption structure is arranged on the framework, the wedge type sound absorption structure sequentially comprises a shell, a sound insulation layer, a multiple sound absorption structure and an inner side sound absorption pore plate from outside to inside, and the wedge type sound absorption structure can absorb stronger noise; the cylindrical sound absorption structure is arranged at the top of the upper end of the silencing cylinder, and can absorb low-and-medium-frequency noise and the noise at the top of the silencing cylinder. Compared with the traditional sheet type silencer, the silencing tube is simpler and easier to manufacture, consumes less materials, is convenient to install, and effectively reduces the cost while greatly improving the silencing effect.
Description
Technical Field
The utility model relates to the technical field of noise reduction, in particular to a wedge-shaped noise reduction barrel.
Background
The cooling tower without fan has the air outside the tower naturally entering the tower due to the pressure difference between the inside and the outside of the tower formed by spraying water curtain, so that the fan and the transmission equipment of the mechanical ventilation cooling tower are not needed. Therefore, the air outlet of the cooling tower has low air speed and low noise value. The air inlet of a general mechanical ventilation cooling tower has larger noise, most of the air inlets are provided with a sheet type silencer, and the silencing effect is better. But the plate type silencer is more material-consuming and has large installation difficulty, and is not suitable for a cooling tower without a fan.
SUMMERY OF THE UTILITY MODEL
The utility model provides a wedge-shaped silencing barrel which can effectively solve the problems.
The utility model is realized by the following steps:
a wedge-type muffling cartridge comprising:
a framework;
the wedge-type sound absorption structure is arranged on the framework, the inner wall of the wedge-type sound absorption structure is a first sound absorption surface and a second sound absorption surface which are alternately arranged, the first sound absorption surface and the plane where the side wall of the silencing cylinder is located form an angle alpha, the second sound absorption surface and the plane where the side wall of the silencing cylinder is located form an angle beta, and sound absorption wedges are formed between the first sound absorption surface and the second sound absorption surface; the layer structure of the wedge sound absorption structure sequentially comprises a shell, a sound insulation layer, a multiple sound absorption structure and an inner side sound absorption pore plate from outside to inside, and the wedge sound absorption structure can absorb strong noise;
the cylindrical sound absorption structure is arranged at the top of the upper end of the silencing cylinder, the cylindrical sound absorption structure comprises a cylindrical shell and a sound absorption material filled in the cylindrical shell, and the cylindrical sound absorption structure can absorb low-frequency noise and the noise at the top of the silencing cylinder.
As a further improvement, the angle α is in the range 5 ° < α < 30 °, and the angle β is in the range 5 ° < β < 30 °.
As a further refinement, the angle α is 15 °, and the angle β is 15 °.
As a further improvement, the multiple noise reduction structure comprises a multiple volume weight hydrophobic sound absorption structure layer and facing structures respectively arranged on the inner surface and the outer surface of the multiple volume weight hydrophobic sound absorption structure layer.
As a further improvement, the multiple sound-deadening structure includes, from outside to inside, material layers including: the sound absorption structure comprises a first professional sound absorption glass cloth, a first PVF sound transmission waterproof film, a multiple volume weight hydrophobic sound absorption structure layer, a second professional sound absorption glass cloth and a second PVF sound transmission waterproof film.
As a further improvement, the material of the multiple volume-weight hydrophobic sound absorption structure layer is any one of glass wool or rock wool.
As a further improvement, the material of the multiple volume weight hydrophobic sound absorption structure layer is glass wool.
As a further improvement, the multiple volume-weight hydrophobic sound absorption structure layer comprises 5 layers of materials with different specifications.
As a further improvement, each layer of the multiple volume-weight hydrophobic sound absorption structure layer is made of hydrophobic superfine centrifugal glass wool, and the specifications from inside to outside are as follows: thickness 50mm and volume weight 80kg/m3A thickness of 50mm and a volume weight of 60kg/m3A thickness of 50mm and a volume weight of 48kg/m3A thickness of 50mm and a volume weight of 32kg/m3100mm in thickness and 32kg/m in volume weight3。
As a further improvement, the cylindrical sound absorption structure is made of glass wool or rock wool.
As a further improvement, the material filled in the cylindrical sound absorption structure is hydrophobic superfine centrifugal glass wool.
The utility model has the beneficial effects that:
the wedge-shaped silencing barrel provided by the utility model is internally designed into a wedge-shaped sound absorption structure, and multiple silencing structures are designed inside the wedge-shaped sound absorption barrel, so that the wedge-shaped sound absorption barrel is in a wedge-shaped step shape and is compact in structure; the multiple noise reduction structure comprises multiple volume weight hydrophobic sound absorption glass wool, so that gradual sound absorption is formed, and the noise reduction effect is greatly improved.
The interior of the silencing cylinder is designed into a strong sound absorption structure from inside to outside, and the inner surface of the silencing cylinder is designed into a strong sound absorption inner surface, so that the strong noise energy in the silencing cylinder can be greatly absorbed, and the silencing quantity of the silencing cylinder is greatly improved. The top of the upper end of the silencing cylinder is provided with a cylindrical sound absorption structure, so that the low and medium frequency noise value and the top diffraction noise value are effectively reduced. The cylindrical sound absorption structure is arranged at the top of the silencing tube, so that the silencing effect can be achieved, and the flow resistance can be effectively smaller.
Compared with the traditional sheet type silencer, the silencing tube is simpler and easier to manufacture, consumes less materials, is convenient to install, and effectively reduces the cost while greatly improving the silencing effect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a sectional view of a wedge-shaped muffling cartridge installed in a cooling tower without a fan according to an embodiment of the present invention.
FIG. 2 is a schematic view of a wedge sound absorbing structure provided by an embodiment of the present invention.
Fig. 3 is a schematic view of a cylindrical sound absorbing structure provided by an embodiment of the present invention.
Fig. 4 is a schematic view of a wedge-shaped muffling cartridge provided by an embodiment of the present invention.
The names of the parts corresponding to the marks in the drawings are as follows:
1-wedge sound absorption structure, 11-shell, 12-sound insulation layer, 13-multiple sound absorption structure, 131-first professional sound absorption glass silk cloth, 132-first PVF sound transmission waterproof film, 133-hydrophobic superfine centrifugal glass wool, 1331-first hydrophobic superfine centrifugal glass wool, 1332-second hydrophobic superfine centrifugal glass wool, 1333-third hydrophobic superfine centrifugal glass wool, 1334-fourth hydrophobic superfine centrifugal glass wool, 1335-fifth hydrophobic superfine centrifugal glass wool, 134-second professional sound absorption glass silk cloth, 135-second PVF sound transmission waterproof film, 14-inner sound absorption pore plate, 15-first sound absorption surface, 16-second sound absorption surface, 2-cylindrical sound absorption structure, 21-thick composite pinhole aluminum, 22-third sound absorption glass silk cloth, 23-third PVF sound-transmitting waterproof film, 24-sixth hydrophobic superfine centrifugal glass wool, 25-cylindrical shell, 26-sound-absorbing material and 3-cooling tower without fan.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of 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 some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 to 3, a wedge-type muffling cartridge, comprising:
a framework;
the wedge-type sound absorption structure 1 is arranged on the framework, the inner wall of the wedge-type sound absorption structure is provided with a first sound absorption surface 15 and a second sound absorption surface 16 which are alternately arranged, the first sound absorption surface 15 and the plane where the side wall of the silencing cylinder is located form an angle alpha, the second sound absorption surface 16 and the plane where the side wall of the silencing cylinder is located form an angle beta, and a sound absorption wedge is formed between the first sound absorption surface 15 and the second sound absorption surface 16; the layer structure of the wedge sound absorption structure 1 sequentially comprises a shell 11, a sound insulation layer 12, a multiple noise reduction structure 13 and an inner side sound absorption pore plate 14 from outside to inside, and can absorb strong noise;
cylindric sound-absorbing structure 2 sets up the upper end top of an anechoic cylinder, cylindric sound-absorbing structure 2 include cylindric shell 25 and fill in the inside sound-absorbing material 26 of cylindric shell, cylindric sound-absorbing structure 2 can absorb well low frequency noise and the noise at anechoic cylinder top.
Referring to fig. 2, the angle α is in the range of 5 ° < α < 30 °, the angle β is in the range of 5 ° < β < 30 °, and a preferred embodiment is an angle α -angle β, wherein a more preferred embodiment is an angle α -angle β -15 °. When the angle is selected to be alpha and beta equal to 15 degrees, the sound absorption wedge is relatively smooth, the contact area between the sound absorption wedge and noise can be ensured to be large, and the sound absorption effect is better.
Part of the layers in the structural layer of the wedge sound absorption structure can be made into a wedge type according to actual requirements so as to meet the requirement of the wedge type structure formed by the first sound absorption surface 15 and the second sound absorption surface 16; it is noted that the first sound absorbing surface 15 and the second sound absorbing surface 16 are for explaining the wedge state of the wedge-shaped sound absorbing structure, and the layer structure of the wedge-shaped sound absorbing structure 1 is for explaining different material layer structures of the wedge-shaped sound absorbing structure.
Referring to fig. 1, the structure of the muffling cylinder on the cooling tower 3 without the fan is as shown in the figure, and an air guide cylinder is formed inside the muffling cylinder. Referring to fig. 4, a wedge-type sound absorbing structure 1 is arranged inside the muffling cylinder, and a cylindrical sound absorbing structure 2 is designed at the top of the upper end of the muffling cylinder.
The framework is made of light steel keels. The material of the shell 11 can adopt stainless steel plate, color steel plate, galvanized sheet, the thickness of the shell 11 can replace different thicknesses according to the characteristics of the noise source, and the 1.5mm baking finish galvanized sheet is adopted in the embodiment. Inboard sound absorption orifice plate 14 can adopt corrosion resistant plate, various steel sheet, galvanized sheet, and what this embodiment adopted is 0.8mm helmholtz resonance sound absorption perforation aluminum plate. The soundproof layer 12 is 3.0 deadening felt.
The multiple noise reduction structure 13 includes a multiple volume-weight hydrophobic sound absorption structure layer 133 and facing structures respectively disposed on the inner and outer surfaces of the multiple volume-weight hydrophobic sound absorption structure layer 133, and the facing structures may be a waterproof film, a glass cloth, or the like. The multi-volume-weight hydrophobic sound absorption structure layer 133 comprises 5 layers of materials with different specifications. The material of the multiple volume weight hydrophobic sound absorption structure layer can be glass wool or rock wool. In this example, the material used was glass wool. Multiple amortization structure is from outside to inside, and the material layer of setting includes: the sound-absorbing film comprises a first professional sound-absorbing glass cloth 131, a first PVF sound-transmitting waterproof film 132, 5 layers of hydrophobic superfine centrifugal glass wool with different specifications, a second professional sound-absorbing glass cloth 134 and a second PVF sound-transmitting waterproof film 135. When the centrifugal glass wool is used, a facing with a certain sound transmission effect is usually added on the surface, so that the facing structures of the inner surface and the outer surface of the multiple volume weight hydrophobic sound absorption structure layer 133 are provided.
The sound-proof felt is fully sprayed with damping slurry. The 5 layers of hydrophobic superfine centrifugal glass wool with different specifications respectively comprises the following components from inside to outside: thickness 50mm and volume weight 80kg/m3The first hydrophobic superfine centrifugal glass wool 1331, the thickness of which is 50mm and the volume weight of which is 60kg/m3The second hydrophobic superfine centrifugal glass wool 1332, the thickness of 50mm and the volume weight of 48kg/m3The third hydrophobic superfine centrifugal glass wool 1333, the thickness of which is 50mm and the volume weight of which is 32kg/m3The fourth hydrophobic superfine centrifugal glass wool 1334 with the thickness of 100mm and the volume weight of 32kg/m3The fifth hydrophobic superfine centrifugal glass wool 1335, each layer of centrifugal glass wool is arranged to be wedge-shaped, and a gradual change type sound absorption wedge-shaped structure is formed layer by layer, so that the structure is compact. The wedge type sound absorption structure is designed into a strong sound absorption structure from inside to outside, the inner surface of the wedge type sound absorption structure is designed into a strong sound absorption inner surface, the strong noise energy in the silencing cylinder can be greatly absorbed, and the silencing quantity of the wedge type sound absorption structure is greatly improved.
Cylindrical sound absorbing structure 2 includes from outside to inside in proper order: thick composite pinhole aluminum 21, third sound absorption glass cloth 22, third PVF sound-transmitting waterproof film 23, sixth hydrophobic superfine centrifugal glass wool 24, and sixth hydrophobic superfine centrifugal glass wool filled in the cylindrical sound absorption structure 2The superfine centrifugal glass wool 24 can be 48kg/m in volume weight3Hydrophobic superfine centrifugal glass wool with volume weight of 60kg/m3The hydrophobic superfine centrifugal glass wool has great amount of inside and outside communicated pores and holes. The top of the air duct is provided with a cylindrical sound absorption structure, edges and corners do not exist, the overall friction coefficient is small, the wind resistance is small, and the secondary noise is effectively reduced. When sound waves are incident on the centrifugal glass wool filled in the cylindrical sound absorption structure 2, the sound waves can enter the material along the pores, and the vibration of air molecules in the pores is caused. Due to the viscous drag of air and the friction of air molecules with the pore walls, acoustic energy is converted into heat energy and lost. The top of the upper end of the silencing cylinder is provided with a cylindrical sound absorption structure, so that the low and medium frequency noise value and the top diffraction noise value are effectively reduced. The cylindrical sound absorption structure 2 is arranged at the top of the silencing tube, so that the silencing effect can be achieved, and the flow resistance can be effectively reduced.
The design of the silencing cylinder basically has no influence on the air outlet efficiency at the top of the cooling tower, but can greatly improve the sound absorption effect. Compared with the traditional sheet type silencer, the silencing tube is simpler and easier to manufacture, consumes less materials, is convenient to install, and effectively reduces the cost while greatly improving the silencing effect.
The wedge-type silencing cylinder provided by the utility model is designed with a silencing structure aiming at the noise spectrum characteristic of a cooling tower without a fan, the multiple silencing structure is designed into a wedge shape and is in a wedge-shaped step shape, and the gradual change type sound absorption structure plays a role in gradual change sound absorption. The sound waves are transmitted in the sound absorption wedge with gradually changed acoustic impedance, so that the sound absorption effect of the sound absorption barrel can be greatly improved. The sound absorption wedge made of the gradually-changed acoustic impedance material has good sound absorption effect in each frequency band, wherein the sound absorption effect on middle and low frequency noise is particularly excellent. The top of the silencing cylinder adopts a cylindrical sound absorption structure, and compared with the traditional sheet type, the cylindrical sound absorption structure can effectively reduce flow resistance while playing a silencing role. The wedge-type silencing tube has the integral silencing quantity of more than 15dB (A).
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A wedge-shaped muffling cartridge, comprising:
a framework;
the wedge-type sound absorption structure (1) is arranged on the framework, the inner wall of the wedge-type sound absorption structure is provided with a first sound absorption surface (15) and a second sound absorption surface (16) which are alternately arranged, the first sound absorption surface (15) and the plane where the side wall of the silencing cylinder is located form an angle alpha, the second sound absorption surface (16) and the plane where the side wall of the silencing cylinder is located form an angle beta, and a sound absorption wedge is formed between the first sound absorption surface (15) and the second sound absorption surface (16); the layer structure of the wedge sound absorption structure (1) sequentially comprises a shell (11), a sound insulation layer (12), a multiple sound absorption structure (13) and an inner side sound absorption pore plate (14) from outside to inside, and the wedge sound absorption structure (1) can absorb stronger noise;
cylindric sound-absorbing structure (2), the setting is in the upper end top of an anechoic cylinder, cylindric sound-absorbing structure (2) include cylindric shell (25) and fill in the sound-absorbing material 26 of cylindric shell (25) inside, cylindric sound-absorbing structure (2) can absorb well low frequency noise and the noise at anechoic cylinder top.
2. The wedge-type muffling cartridge of claim 1, wherein said angle α ranges from 5 ° < α < 30 °, and said angle β ranges from 5 ° < β < 30 °.
3. The wedge-type muffling cartridge of claim 2, wherein said angle α is 15 ° and said angle β is 15 °.
4. The wedge-shaped silencing pot as claimed in claim 1, wherein said multiple silencing structure (13) comprises multiple hydrophobic sound absorbing structure layers with bulk density and facing structures respectively disposed on the inner and outer surfaces of said multiple hydrophobic sound absorbing structure layers with bulk density.
5. Wedge-shaped silencing pot according to claim 1, characterized in that said multiple silencing structures (13) are provided with a layer of material from the outside to the inside comprising: the sound absorption structure comprises a first professional sound absorption glass cloth (131), a first PVF sound transmission waterproof film (132), a multiple volume-weight hydrophobic sound absorption structure layer (133), a second professional sound absorption glass cloth (134) and a second PVF sound transmission waterproof film (135).
6. The wedge-type muffling barrel of claim 5, wherein the material of the multi-volume-weight hydrophobic sound absorbing structural layer (133) is any one of glass wool and rock wool.
7. Wedge-shaped muffling cartridge according to claim 5, wherein the multi-volume-weighted hydrophobic sound absorbing structural layer (133) comprises 5 layers of materials with different specifications.
8. The wedge-shaped silencing pot as claimed in claim 5, wherein each layer of the multiple volume-weight hydrophobic sound absorption structure layer (133) is made of hydrophobic superfine centrifugal glass wool, and the specifications from inside to outside are as follows: thickness 50mm and volume weight 80kg/m3A thickness of 50mm and a volume weight of 60kg/m3A thickness of 50mm and a volume weight of 48kg/m3A thickness of 50mm and a volume weight of 32kg/m3100mm in thickness and 32kg/m in volume weight.
9. The wedge-shaped muffling barrel according to claim 1, wherein the cylindrical sound absorbing structure (2) is made of glass wool or rock wool.
10. The wedge-shaped silencing pot according to claim 8, wherein the material filled in the cylindrical sound absorbing structure (2) is hydrophobic superfine centrifugal glass wool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121330168.0U CN215725256U (en) | 2021-06-15 | 2021-06-15 | Wedge-shaped silencing cylinder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121330168.0U CN215725256U (en) | 2021-06-15 | 2021-06-15 | Wedge-shaped silencing cylinder |
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| Publication Number | Publication Date |
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| CN215725256U true CN215725256U (en) | 2022-02-01 |
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| CN202121330168.0U Active CN215725256U (en) | 2021-06-15 | 2021-06-15 | Wedge-shaped silencing cylinder |
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| CN (1) | CN215725256U (en) |
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2021
- 2021-06-15 CN CN202121330168.0U patent/CN215725256U/en active Active
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