CN215643682U - Sound insulation cover of smoke exhaust ventilator - Google Patents
Sound insulation cover of smoke exhaust ventilator Download PDFInfo
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- CN215643682U CN215643682U CN202122179131.9U CN202122179131U CN215643682U CN 215643682 U CN215643682 U CN 215643682U CN 202122179131 U CN202122179131 U CN 202122179131U CN 215643682 U CN215643682 U CN 215643682U
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Abstract
The utility model provides a smoke exhaust ventilator sound insulation cover, which comprises a sound insulation cover arranged at an air outlet of an exhaust pipe of a smoke exhaust ventilator, wherein an air outlet silencer is arranged at the upper part of the sound insulation cover, and a plurality of obliquely arranged silencing inclined insertion pieces are uniformly distributed in the air outlet silencer; the air outlet silencer is made of a sound absorption and insulation plate, the sound absorption and insulation plate comprises a panel made of galvanized steel sheets, the panel is in a frame shape and formed by splicing a bottom plate and four side plates, sound absorption cotton is filled in the panel, and the other side of the panel, which is opposite to the bottom plate, is sealed by a perforated plate; the oblique inserted sheet of noise elimination includes the framework that is formed by the concatenation of zinc-plated perforated plate, packs the sound absorption cotton in the framework. The utility model can greatly reduce the noise of the range hood in the using process.
Description
Technical Field
The utility model belongs to the field of range hoods, and particularly relates to a range hood sound insulation cover.
Background
The situation before the noise control of the roof high-pressure air draft cabinet unit is as follows: the roof high-pressure air draft cabinet unit mainly comprises a roof high-pressure air draft cabinet, an air pipe and the like, the noise reaches 103dB when the roof high-pressure air draft cabinet unit operates, and the reason of the formed high noise mainly comprises the following aspects:
1. when the roof high-pressure air draft cabinet unit is in operation, the fan blades of the roof high-pressure air draft cabinet unit compress the air around to generate aerodynamic noise;
2. the vibration noise generated when the air pipe connected with the roof high-pressure air draft cabinet unit operates and the electromagnetic noise generated by the motor.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a sound insulation cover of a range hood aiming at the defects of the background art, which can greatly reduce the noise of the range hood in the using process.
The utility model adopts the following technical scheme for solving the technical problems:
a smoke exhaust ventilator sound insulation cover comprises a sound insulation cover arranged at an air outlet of an exhaust pipe of a smoke exhaust ventilator, wherein an air outlet silencer is arranged at the upper part of the sound insulation cover, and a plurality of obliquely arranged silencing inclined insertion pieces are uniformly distributed in the air outlet silencer;
the air outlet silencer is made of a sound absorption and insulation plate, the sound absorption and insulation plate comprises a panel made of galvanized steel sheets, the panel is in a frame shape and formed by splicing a bottom plate and four side plates, sound absorption cotton is filled in the panel, and the other side of the panel, which is opposite to the bottom plate, is sealed by a perforated plate;
the oblique inserted sheet of noise elimination includes the framework that is formed by the concatenation of zinc-plated perforated plate, packs the sound absorption cotton in the framework.
Furthermore, the sound absorption cotton is wrapped with alkali-free hydrophobic glass fiber silk cloth.
Furthermore, one end of the silencing inclined insertion piece facing the sound insulation cover is provided with a flow guide angle.
Further, the thickness of the galvanized steel sheet is not less than 1.5mm, and the double-sided galvanizing quantity is not less than 150g/m2。
Furthermore, the sound absorption cotton adopts centrifugal glass cotton, and the volume weight of the centrifugal glass cotton is not less than 48kg/m3The allowable volume weight error is not more than +/-5%; the centrifugal glass wool is made of superfine glass wool, the water content is not more than 1%, the mass moisture absorption rate is not more than 5%, the hydrophobic rate is not less than 98%, the amount of mixed impurities is not more than 3%, the sound absorption coefficient NRC is not less than 0.95, the fiber diameter is less than 8 microns, no slag balls are contained, and the centrifugal glass wool is moisture-proof and does not absorb water.
Furthermore, a sound insulation door is arranged on one side of the sound insulation cover.
Furthermore, steel frameworks are arranged in the panel at intervals.
Compared with the prior art, the utility model adopting the technical scheme has the following technical effects:
1. after the application of the patent, the noise emission index is detected outside the sound insulation cover, the noise can be reduced by 38-40dB (A), and the noise value detected at the sensitive point of the residents 40 meters away from the roof high-pressure air draft cabinet reaches the second type of emission standard (less than or equal to 60dB (A) in the daytime and less than or equal to 50dB (A) at night);
2. the roof high-voltage air draft cabinet unit adopts a noise reduction method of sound insulation and noise elimination, the sound insulation cover mainly isolates a noise source and cuts off the propagation path of sound, and the sound insulation cover is arranged between the noise source and a sound receiver to effectively control the sound propagation. The principle is as follows: when noise encounters obstacles of a size much larger than the wavelength of the sound wave during propagation, most of the sound can be reflected or resolved or partially diffracted.
Drawings
FIG. 1 is a schematic view of the overall structure of the present embodiment;
FIG. 2 is a top view of the present embodiment;
FIG. 3 is a structural diagram of the silencing angled insert in this embodiment;
fig. 4 is a structural view of the sound absorbing and insulating panel according to the present embodiment.
In the figure, 1, an exhaust duct; 2. a sound insulating cover; 21. a sound-proof door; 3. an air outlet silencer; 31. a silencing inclined insertion piece; 4. a panel; 41. a base plate; 42. a side plate; 43. sound absorbing cotton; 431. asphalt; 44. a perforated plate.
Detailed Description
The technical scheme of the utility model is further explained in detail by combining the attached drawings:
the utility model aims to provide a sound insulation cover for treating noise of a roof high-pressure air draft cabinet unit, after the application of the patent, noise emission indexes can be reduced by 38-40dB (A) by detecting the noise emission indexes outside the sound insulation cover, and the detected noise value of a sensitive point of residents at a distance of 40 meters from the roof high-pressure air draft cabinet reaches the second-class emission standard (less than or equal to 60dB (A) in the daytime and less than or equal to 50dB (A) at night).
The sound absorption, insulation and noise reduction scheme with mature technology is adopted for the noise control of the roof high-pressure air draft cabinet unit:
firstly, the noise reduction method of sound insulation and noise elimination is adopted by the roof high-pressure air draft cabinet unit, the sound insulation cover 2 mainly isolates a noise source, the propagation path of sound is cut off, and the sound insulation cover 2 is arranged between the noise source and a sound receiver to effectively control the propagation of sound. The principle is as follows: when noise encounters obstacles of a size much larger than the wavelength of the sound wave during propagation, most of the sound can be reflected or resolved or partially diffracted.
Secondly, because the roof high-pressure ventilation cabinet unit has requirements on air quantity when in normal operation, the sound insulation cover must be provided with an air outlet, and the sound-deadening inclined insertion piece 31 is arranged at the air outlet and is used for sound deadening of the air outlet.
Thirdly, in order to meet the requirements of equipment maintenance, a sound insulation door is required to be arranged on the sound insulation cover.
Namely, the sound insulation cover of the roof high-voltage air draft cabinet must meet the following three requirements:
1. the roof high-pressure air draft cabinet unit is provided with a closed type sound insulation cover 2;
2. the sound insulation cover needs to be additionally provided with an air outlet silencer 3;
3. the sound insulation cover is provided with a sound insulation door 31 for maintenance.
The utility model adopts the mode that the corresponding space is reserved on the top surface of the sound insulation cover to install the oblique silencing insertion piece 31, thereby ensuring the normal ventilation, heat dissipation and silencing of the top and ensuring the air exhaust and silencing requirements of the range hood unit.
The sound insulation cover is suitable for the air volume, the air pressure range and the flow speed and the air volume of 6000-; the working pressure is generally 1000-3000 Pa; the wind speed of the silencing channel is 12-18 m/s; noise reduction by 38-40dB (A) for noise elimination; pressure loss: 150 and 170 Pa.
The concrete structure of the utility model is as follows: a smoke ventilator sound insulation cover 2, as shown in figure 1, 2 and 3, is including installing the sound insulation cover 2 at smoke ventilator exhaust pipe 1 air outlet department, 2 one side of sound insulation cover is provided with sound insulation door 21 for the maintenance. An air outlet silencer 3 is arranged at the upper part of the sound insulation cover 2, and a plurality of obliquely arranged silencing inclined insertion pieces 31 are uniformly distributed in the air outlet silencer 3; the silencing inclined insertion piece 31 comprises a frame body formed by splicing galvanized perforated plates 44, sound absorption cotton 43 is filled in the frame body, and alkali-free hydrophobic glass fiber silk cloth wraps the sound absorption cotton 43. One end of the silencing inclined insertion piece 31 facing the sound insulation cover 2 is provided with a pointed diversion angle.
The air outlet silencer 3 is made of a sound absorption and insulation plate, the sound absorption and insulation plate comprises a panel 4 made of galvanized steel plates, the thickness of each galvanized steel plate is not less than 1.5mm, and the double-sided galvanizing amount is not less than 150g/m 2. The panel 4 is frame type, and is formed by a bottom plate 41 and four blocks of curb plates 42 concatenation, packs the sound absorption cotton 43 in the panel 4, and the sound absorption cotton 43 passes through pitch 431 and bonds in the panel 4, and the outer parcel of sound absorption cotton 43 has alkali-free hydrophobic glass fiber cloth, and the panel 4 is sealed through perforated plate 44 for the opposite side of bottom plate 41. And steel frameworks are arranged in the panel 4 at intervals and used for increasing the strength.
Specifically, the size of the inner diameter length and width space of the sound insulation cover is 500mm larger than that of each side of the cabinet, and the height of the sound insulation cover is 500mm higher than that of the wind cabinet; the length of a silencing passage of the air outlet silencer is 3500mm, and the air speed of the silencing passage is preferably less than 15 m/s.
As shown in fig. 4, the specific structure of the sound absorption and insulation board includes: galvanized steel sheet (surface plastic spraying) + steel skeleton + pitch self-adhesive + 48K sound-absorbing cotton with thickness of 100mm + alkali-free hydrophobic glass fiber cloth + aluminum alloy pore plate. The whole sound insulation amount is more than or equal to 40dB (A), and the size of the sound absorption and insulation plate is actually manufactured on site.
The oblique inserted sheet 31 structure of eliminating noise includes: 0.8mm galvanized perforated plate 44+ steel skeleton +100mm thick 48K sound absorption cotton 43+ alkali-free hydrophobic glass fiber cloth wrapped sound absorption cotton 43+0.8mm thick galvanized perforated plate 44. The air outlet silencing insertion piece is provided with a flow guide angle, so that the air flow resistance is reduced. The effective length of air outlet silencer is 1800mm in this scheme.
The galvanized steel sheet structure is: the thickness is not less than 1.5mm, and the double-sided galvanizing amount is not less than 150g/m 2. The galvanized steel sheet should be a high-quality product of domestic famous factories.
The galvanized perforated plate 44 has the following specific structure: the perforated plate 44 has a thickness of not less than 0.8mm and a double-sided zinc plating amount of not less than 150g/m 2.
The galvanized perforated plate 44 should be a high quality product from a well-known domestic manufacturer.
The concrete structure of the sound absorption cotton 43 is as follows: the sound absorption cotton 43 adopts centrifugal glass cotton, the volume weight of the centrifugal glass cotton is not less than 48kg/m3, and the allowable volume weight error is not more than +/-5%; the centrifugal glass wool is made of superfine glass wool, the water content is not more than 1%, the mass moisture absorption rate is not more than 5%, the hydrophobic rate is not less than 98%, the amount of mixed impurities is not more than 3%, the sound absorption coefficient NRC is not less than 0.95, the fiber diameter is less than 8 microns, no slag balls are contained, and the centrifugal glass wool is moisture-proof and does not absorb water.
The noise reduction performance detection data of the utility model are as follows:
it will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the protection scope of the present invention. While the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (7)
1. The utility model provides a smoke ventilator sound insulation cover which characterized in that: the exhaust hood comprises a sound insulation cover (2) arranged at an air outlet of an exhaust pipe (1) of the range hood, wherein an air outlet silencer (3) is arranged at the upper part of the sound insulation cover (2), and a plurality of obliquely arranged silencing inclined insertion pieces (31) are uniformly distributed in the air outlet silencer (3);
the air outlet silencer (3) is made of a sound absorption and insulation plate, the sound absorption and insulation plate comprises a panel (4) made of galvanized steel sheets, the panel (4) is in a frame shape and formed by splicing a bottom plate (41) and four side plates (42), sound absorption cotton (43) is filled in the panel (4), and the other side, opposite to the bottom plate (41), of the panel (4) is sealed through a perforated plate (44);
the silencing inclined insertion piece (31) comprises a frame body formed by splicing galvanized perforated plates (44), and sound absorption cotton (43) is filled in the frame body.
2. The range hood sound insulation cover of claim 1, wherein: and alkali-free hydrophobic glass fiber silk cloth is wrapped outside the sound absorption cotton (43).
3. The range hood sound insulation cover of claim 1, wherein: one end of the silencing inclined insertion piece (31) facing the sound insulation cover (2) is provided with a flow guide angle.
4. The range hood sound insulation cover of claim 1, wherein: the thickness of the galvanized steel sheet is not less than 1.5mm, and the double-sided galvanizing amount is not less than 150g/m 2.
5. The range hood sound insulation cover of claim 1, wherein: the sound absorption cotton (43) adopts centrifugal glass cotton, the volume weight of the centrifugal glass cotton is not less than 48kg/m3, and the allowable volume weight error is not more than +/-5%; the centrifugal glass wool is made of superfine glass wool, the water content is not more than 1%, the mass moisture absorption rate is not more than 5%, the hydrophobic rate is not less than 98%, the impurity content is not more than 3%, the sound absorption coefficient NRC is not less than 0.95, the fiber diameter is less than 8 microns, and the centrifugal glass wool does not contain slag balls, is moisture-proof and does not absorb water.
6. The range hood sound insulation cover of claim 1, wherein: and a sound insulation door (21) is arranged on one side of the sound insulation cover (2).
7. The range hood sound insulation cover of claim 1, wherein: and steel frameworks are arranged in the panel (4) at intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122179131.9U CN215643682U (en) | 2021-09-09 | 2021-09-09 | Sound insulation cover of smoke exhaust ventilator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122179131.9U CN215643682U (en) | 2021-09-09 | 2021-09-09 | Sound insulation cover of smoke exhaust ventilator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215643682U true CN215643682U (en) | 2022-01-25 |
Family
ID=79914666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122179131.9U Active CN215643682U (en) | 2021-09-09 | 2021-09-09 | Sound insulation cover of smoke exhaust ventilator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215643682U (en) |
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2021
- 2021-09-09 CN CN202122179131.9U patent/CN215643682U/en active Active
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