CN201072305Y - Ventilation silencer for natural-draft cooling tower - Google Patents
Ventilation silencer for natural-draft cooling tower Download PDFInfo
- Publication number
- CN201072305Y CN201072305Y CNU2007200432157U CN200720043215U CN201072305Y CN 201072305 Y CN201072305 Y CN 201072305Y CN U2007200432157 U CNU2007200432157 U CN U2007200432157U CN 200720043215 U CN200720043215 U CN 200720043215U CN 201072305 Y CN201072305 Y CN 201072305Y
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- ventilation
- muffler
- sound
- air outlet
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Abstract
The utility model relates to a ventilation muffler of a natural ventilation cooling tower. The ventilation muffler comprises a square metal pipe. Sound-absorbing cottons and a ventilation channel are arranged in the pipe; the sound-absorbing cottons are covered with waterproofing membrane and are in interlayers between metal plates at two sides of the ventilation channel and inner wall of the pipe; the metal plates at two sides of the ventilation channel are flared in the directions of an air inlet and an air outlet respectively; sound-absorbing holes are distributed on the metal plates on the air outlet side. The metal plates at two sides of the ventilation channel are provided with symmetrical arc flares on two sides of the air inlet and unsymmetrical flares on two sides of the air outlet, with one side of the flare an arc and the other side a bevel face. The ventilation muffler of the utility model can optimize flow field in the muffler, reduce resistance and reduce noise effectively; additionally, waterproofing and aging-resistant membrane is used to cover the muffler, and waterproofing performance is good and service life is long.
Description
Technical field
The utility model relates to a kind of ventilation silencer that is used to reduce the trickle noise of power plant's hyperbolic natural-draft cooling tower.
Background technology
The noise that cooling stack sends mainly is a trickle sound, at water from the process that eminence falls, power conversion by potential energy to kinetic energy, when water when the pond water surface collides, kinetic energy converts heat energy and acoustic energy to, has produced huge noise.
At present, there is the large-scale hyperbola nature of over thousands of seat cooling tower in the Chinese large-sized thermal power plant, and its strength of sound source all exists the noise pollution of certain intensity during operation between 72～88dB (A).The cooling tower position of power plant is mostly near factory circle, often causes that noise exceeds standard can not reach the requirement of GB12348-90 " factory circle of industrial enterprise noise criteria ".
Silencer is a kind of device that allows air communication to cross and can stop or weaken sound transmission, at the air inlet of cooling tower ventilation silencer being installed is a kind of effective noise-reduction method, and have antifreezing effect concurrently, but ventilation silencer sound deadening capacity commonly used at present is little, resistance coefficient big, water resistance is poor, service life is short, thereby can not be used for the noise control of cooling stack.
Summary of the invention
In order to address the above problem, the utility model provides a kind of ventilation silencer, is used for the noise control of hyperbolic natural-draft cooling tower, and it can guarantee the gravity-flow ventilation of cooling tower again when reducing noise.
This ventilation silencer, shell is a metal body, be provided with acoustical cotton and ventilating duct in the pipe, the sound absorption bale of cotton has waterproofing membrane, and be located at respectively in the metallic plate and the interlayer between the inboard wall of tube body of ventilating duct both sides, to air inlet and the enlarging of air outlet direction, metallic plate is distributed with the sound absorption aperture at outlet side to the metallic plate of ventilating duct both sides respectively.
Preferably, the metallic plate of ventilating duct both sides is symmetrical cambered surface enlarging in the both sides of air inlet, be asymmetric enlarging in the both sides of air outlet, and a side of this enlarging is a cambered surface, and opposite side is the inclined-plane.
More preferably, the metal body of this ventilation silencer is a rectangular tube.
This ventilation silencer is compared with existing silencer, can optimize the flow field of silencer inside, reduces resistance, and effectively noise reduction uses waterproof aging-resistant film to encase sound absorber in addition, and water resistance is good, long service life.
Description of drawings
Fig. 1 is the longitudinal sectional drawing of this silencer.
Wherein, 1 is ventilating duct, and 2 is metal tube, and 3 is cotton for sound absorption, and 4 is waterproofing membrane, and 5 are the sound absorption hole, and 6 is metallic plate, and 6-1 is symmetrical cambered surface enlarging, and 6-2 is asymmetric enlarging.
The specific embodiment
Below in conjunction with description of drawings embodiment of the present utility model.
As shown in Figure 1, this ventilation silencer, contain a square hot-dip galvanized steel sheet metal body 2, be provided with centrifugally glass-wool felt sound absorption cotton 3 and ventilating duct 1 in the pipe, sound absorption cotton 3 is surrounded by waterproofing membrane 4, and be located at respectively in the interlayer between the inwall of the metallic plate 6 of ventilating duct 1 both sides and body 2, the metallic plate 6 of ventilating duct 1 both sides is respectively to air inlet and the enlarging of air outlet direction, and metallic plate is distributed with sound absorption hole 5 at outlet side.
The metallic plate of ventilating duct both sides is symmetrical cambered surface enlarging 6-1 in the both sides of air inlet, be asymmetric enlarging 6-2 in the both sides of air outlet, and as seen from the figure, this enlarging one side is a cambered surface, and opposite side is the inclined-plane, and both are asymmetric.
During use, silencer is arranged on need the insulate against sound air inlet periphery in orientation of cooling tower, several ventilation silencers are arranged in order, and Xiang Lei up and down, outside the air inlet of cooling tower, forming " wall " of certain altitude, the outlet air end of each ventilation silencer is inwardly, towards cooling tower, air intake outwardly.After trickle sound spread out of in the cooling tower, the metallic plate sound absorption hole 5 through the air outlet place of ventilation silencer was absorbed by centrifugally glass-wool felt sound absorption cotton 3, thereby weaken noise, in addition, natural wind then enters in the cooling tower through silencer air inlet, ventilating duct, air outlet, plays cooling effect.
Claims (3)
1. ventilation silencer, contain a metal body, be provided with sound absorption cotton and ventilating duct in the pipe, it is characterized in that the cotton outer waterproofing membrane that is surrounded by of sound absorption, and be located at respectively in the metallic plate and the interlayer between the inboard wall of tube body of ventilating duct both sides, to air inlet and the enlarging of air outlet direction, metallic plate is distributed with the sound absorption aperture at outlet side to the metallic plate of ventilating duct both sides respectively.
2. ventilation silencer according to claim 1 is characterized in that the metallic plate of described ventilating duct both sides is the cambered surface enlarging of symmetry in the both sides of air inlet, is asymmetric enlarging in the both sides of air outlet, and a side of this enlarging is a cambered surface, and opposite side is the inclined-plane.
3. ventilation silencer according to claim 1 and 2 is characterized in that described metal body is a rectangular tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200432157U CN201072305Y (en) | 2007-08-16 | 2007-08-16 | Ventilation silencer for natural-draft cooling tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200432157U CN201072305Y (en) | 2007-08-16 | 2007-08-16 | Ventilation silencer for natural-draft cooling tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201072305Y true CN201072305Y (en) | 2008-06-11 |
Family
ID=39550863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200432157U Expired - Lifetime CN201072305Y (en) | 2007-08-16 | 2007-08-16 | Ventilation silencer for natural-draft cooling tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201072305Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269183A (en) * | 2011-07-08 | 2011-12-07 | 无锡杰尔压缩机有限公司 | Air outlet structure of filter silencer |
| CN101377388B (en) * | 2008-09-11 | 2012-01-25 | 金坛市塑料厂 | Sound absorption and noise reduction plate special for cooling tower noise reduction and anti-freezing device |
| CN104713384A (en) * | 2015-03-13 | 2015-06-17 | 芜湖凯博实业股份有限公司 | Cooling tower |
| CN107355934A (en) * | 2017-07-27 | 2017-11-17 | 钱月珍 | Jing Yin ventilating system |
| CN113899066A (en) * | 2021-11-03 | 2022-01-07 | 汉尔姆建筑科技有限公司 | Air duct structure for sound insulation and noise reduction |
-
2007
- 2007-08-16 CN CNU2007200432157U patent/CN201072305Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101377388B (en) * | 2008-09-11 | 2012-01-25 | 金坛市塑料厂 | Sound absorption and noise reduction plate special for cooling tower noise reduction and anti-freezing device |
| CN102269183A (en) * | 2011-07-08 | 2011-12-07 | 无锡杰尔压缩机有限公司 | Air outlet structure of filter silencer |
| CN104713384A (en) * | 2015-03-13 | 2015-06-17 | 芜湖凯博实业股份有限公司 | Cooling tower |
| CN107355934A (en) * | 2017-07-27 | 2017-11-17 | 钱月珍 | Jing Yin ventilating system |
| CN107355934B (en) * | 2017-07-27 | 2019-11-26 | 何洪波 | Mute ventilating system |
| CN113899066A (en) * | 2021-11-03 | 2022-01-07 | 汉尔姆建筑科技有限公司 | Air duct structure for sound insulation and noise reduction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080611 |