CN207741597U - A kind of air outlet micropore plate muffler for crossflow cooling tower - Google Patents
A kind of air outlet micropore plate muffler for crossflow cooling tower Download PDFInfo
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- CN207741597U CN207741597U CN201721801008.3U CN201721801008U CN207741597U CN 207741597 U CN207741597 U CN 207741597U CN 201721801008 U CN201721801008 U CN 201721801008U CN 207741597 U CN207741597 U CN 207741597U
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- cooling tower
- air outlet
- perforated plate
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Abstract
The utility model provides a kind of air outlet micropore plate muffler for crossflow cooling tower, including：Hollow center and cross part, the low frequency noise for absorbing 80 250HZ, lower wall are made of low frequency perforated plate, and the low frequency perforation back is air cavity；Hollow outer perimeter section, the high frequency noise for absorbing 250 1250HZ, inner wall are made of high frequency perforated plate, and the high frequency perforation back is air cavity.Compared to the prior art, the muffler structure is simple for the utility model, and center and cross part mainly absorb low frequency noise, and outer perimeter section mainly absorbs high frequency noise, and the noise of cooling tower is effectively greatly reduced；The muffler does not include inflammable constituent, does not cause damages to environment yet.
Description
Technical field
The utility model is related to cooling tower technical field, specifically a kind of air outlet microwell plate for crossflow cooling tower disappears
Sound device.
Background technology
Cooling tower is to use water as circulating coolant, is absorbed in heat dissipation to air from a system, to reduce water temperature
Device；Water carries out cold and hot exchange and generates steam after being contacted with air flowing, steam volatilization takes away heat and reaches evaporative heat loss.For
Hot-air is discharged in time, cooling fan can be generally installed at the top of cooling tower.In cooling tower operational process, fan and motor
Generate a large amount of noises.When cooling tower is installed in the area to noise-sensitive, noise specification becomes one of cooling tower overall performance
Important indicator.There are two types of currently used noise reduction modes, and one is certain area concentrations outside tower to do soundproof wall, occupies a large amount of
Space；Another kind is to add noise reduction attachment to tower itself, includes the muffler of air inlet and air outlet, and muffler mostly uses at present
For the hollow materials such as glass fibre or rock wool as filler, these fillers itself are inflammable, and harmful to environment.
Utility model content
In order to overcome the above-mentioned deficiencies of the prior art, the purpose of the utility model is to provide one kind being used for crossflow cooling tower
Air outlet micropore plate muffler.
In order to achieve the above objectives, technical solution adopted by the utility model to solve its technical problems is：One kind is for cross
The air outlet micropore plate muffler of cooling tower is flowed, including：Hollow center and cross part, the low frequency for absorbing 80-250HZ
Noise, lower wall are made of low frequency perforated plate, and the low frequency perforation back is air cavity；Hollow outer perimeter section, is used for
The high frequency noise of 250-1250HZ is absorbed, inner wall is made of high frequency perforated plate, and the high frequency perforation back is air cavity.
Compared to the prior art, the muffler structure is simple for the utility model, and center and cross part mainly absorb low frequency
Noise, outer perimeter section mainly absorb high frequency noise, and the noise of cooling tower is effectively greatly reduced；The muffler do not include it is inflammable at
Point, it does not also cause damages to environment.
Further, the resonant frequency of the low frequency perforated plate is 120HZ.
Further, the plate thickness of the low frequency perforated plate is 1-2mm, piercing aperture 0.5-1mm, punching rate 0.5-
1.5%, cavity depth is 300-600mm after plate.
Using the above preferred scheme, the acoustic absorptivity between frequency 80-250HZ is 0.45 or more, to low frequency noise
Play good absorption.
Further, the plate thickness of the low frequency perforated plate is 1.5mm, piercing aperture 0.75mm, punching rate 1%, plate
Cavity depth is 476mm afterwards.
Using the above preferred scheme, the acoustic absorptivity at resonant frequency 120HZ be 0.9, frequency 57-252HZ it
Between acoustic absorptivity still 0.45 or more, have good sound absorption characteristics to low-frequency range.
Further, the resonant frequency of the high frequency perforated plate is 555HZ.
Further, the plate thickness of the high frequency perforated plate is 1-2mm, piercing aperture 0.4-0.8mm, punching rate 1.5-
2.5%, cavity depth is 55-80mm after plate.
Using the above preferred scheme, the acoustic absorptivity between frequency 250-1250HZ makes an uproar to high frequency 0.47 or more
Sound plays good absorption.
Further, the plate thickness of the high frequency perforated plate is 1.5mm, piercing aperture 0.5mm, punching rate 2%, after plate
Cavity depth is 69mm.
Using the above preferred scheme, the acoustic absorptivity at resonant frequency 555HZ is 0.95, in frequency 256-1202HZ
Between acoustic absorptivity still 0.47 or more, have good sound absorption characteristics to high band.
Further, the outer perimeter section shape is octagon.
Using the above preferred scheme, it is convenient for manufacture, facilitates installation, stable structure.
Further, the low frequency perforated plate, high frequency perforated plate are aluminium sheet or galvanized sheet.
Using the above preferred scheme, high-precision hole dimension can be produced, improves and eliminates noise result, Er Qienai
Corrosivity is strong, and service life is long.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is a kind of structural schematic diagram of embodiment of the utility model；
Fig. 2 is the structural schematic diagram of the utility model another embodiment；
Fig. 3 is the structural schematic diagram of the utility model another embodiment；
Fig. 4 is the front and back noise distribution map of muffler installation.
The title of number and the corresponding component represented by letter in figure：
1- mufflers；11- outer perimeter sections；111- low frequency perforated plates；The centers 12- and cross part；121- high frequency perforated plates；
2- cooling tower fans；3- cooling tower top frames.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
The every other embodiment obtained, shall fall within the protection scope of the present invention.
As shown in Figs. 1-2, a kind of embodiment of the utility model is：A kind of air outlet micropore for crossflow cooling tower
Plate muffler 1, including：Hollow center and cross part 11, the low frequency noise for absorbing 80-250HZ, lower wall is by low frequency
Perforated plate 111 is constituted, and 111 back side of low frequency perforated plate is air cavity；Hollow outer perimeter section 12, for absorbing 250-1250HZ
High frequency noise, inner wall is made of high frequency perforated plate 121, and 121 back side of high frequency perforated plate is air cavity.
It is using the advantageous effect of above-mentioned technical proposal：The muffler structure is simple, and center and cross part 11 are mainly inhaled
Low frequency noise is received, outer perimeter section 12 mainly absorbs high frequency noise, which does not include inflammable constituent, do not cause to endanger to environment yet
Evil, is simply and effectively greatly reduced the noise of cooling tower.
In other embodiments of the utility model, the resonant frequency of low frequency perforated plate 111 is 120HZ；High frequency is worn
The resonant frequency of orifice plate 121 is 555HZ.It is using the advantageous effect of above-mentioned technical proposal：Make muffler 1 to 80-1250HZ's
Noise can effectively absorb.
As shown in Figure 2,3, in other embodiments of the utility model, the plate thickness of low frequency perforated plate 111 is 1-
2mm, piercing aperture 0.5-1mm, punching rate 0.5-1.5%, cavity depth D is 300-600mm after plate；High frequency perforated plate
121 plate thickness is 1-2mm, piercing aperture 0.4-0.8mm, punching rate 1.5-2.5%, and cavity depth d is 55- after plate
80mm.It is using the advantageous effect of above-mentioned technical proposal：Low frequency noise reduction part 11, the acoustic absorptivity between frequency 80-250HZ
0.45 or more, good absorption is played to low frequency noise；High frequency noise reduction part 12, between frequency 250-1250HZ
Acoustic absorptivity plays good absorption 0.47 or more, to high frequency noise.
In other embodiments of the utility model, the plate thickness of low frequency perforated plate 111 is 1.5mm, and piercing aperture is
0.75mm, punching rate 1%, cavity depth D is 476mm after plate；The plate thickness of high frequency perforated plate 121 is 1.5mm, and piercing aperture is
0.5mm, punching rate 2%, cavity depth d is 69mm after plate.It is using the advantageous effect of above-mentioned technical proposal：Low frequency noise elimination part
Divide 11, the acoustic absorptivity at resonant frequency 120HZ is 0.9, and the acoustic absorptivity between frequency 57-252HZ is still 0.45
More than, there are good sound absorption characteristics to low-frequency range；High frequency noise reduction part 12, the acoustic absorptivity at resonant frequency 555HZ are
0.95, the acoustic absorptivity between frequency 256-1202HZ has good sound absorption characteristics still 0.47 or more to high band.
It is the noise distribution map before and after cooling tower installation muffler in Fig. 4.Muffler characteristic is as follows：Low frequency perforated plate 111
Plate thickness be 1.5mm, piercing aperture 0.75mm, punching rate 1%, cavity depth D is 476mm after plate；High frequency perforated plate 121
Plate thickness be 1.5mm, piercing aperture 0.5mm, punching rate 2%, cavity depth d is 69mm after plate.Test equipment：Japan's reason
The NL-52 type noise-measuring instruments of sound company production.Test condition：At on the outside of cooling tower air intake surface 1.5 meters.What is obtained is each
Frequency range noise data as shown in figure 4, dotted portion is noise distribution curve before muffler installation, for muffler install by bold portion
Noise distribution curve afterwards.Conclusion：The noise peak of the parts frequency 80-2500HZ has obtained effective abatement, although 4000HZ with
The noise peak of upper part increased, but less than 50 decibels hereinafter, the noise to cooling tower effectively eliminates.
In other embodiments of the utility model, 12 shape of outer perimeter section is octagon.Using above-mentioned technology
The advantageous effect of scheme is：Convenient for manufacture, facilitate installation, stable structure.
In other embodiments of the utility model, low frequency perforated plate 111, high frequency perforated plate 121 are aluminium sheet or plating
Zine plate.It is using the advantageous effect of above-mentioned technical proposal：High-precision hole dimension can be produced, improves and eliminates noise effect
Fruit, and corrosion resistance is strong, and service life is long.
Above-described embodiment is only to illustrate the technical concepts and features of the utility model, and its object is to allow the common skill in this field
Art personnel can understand the content of the utility model and be implemented, and can not limit the scope of protection of the utility model with this,
It is all according to equivalent change or modification made by the spirit of the present invention essence, should all cover in the scope of protection of the utility model
It is interior.
Claims (9)
1. a kind of air outlet micropore plate muffler for crossflow cooling tower, which is characterized in that including：
Hollow center and cross part, the low frequency noise for absorbing 80-250HZ, lower wall are made of low frequency perforated plate, institute
It is air cavity to state low frequency perforation back；
Hollow outer perimeter section, the high frequency noise for absorbing 250-1250HZ, inner wall are made of high frequency perforated plate, the height
Frequency perforation back is air cavity.
2. the air outlet micropore plate muffler according to claim 1 for crossflow cooling tower, which is characterized in that described low
The resonant frequency of frequency perforated plate is 120HZ.
3. the air outlet micropore plate muffler according to claim 1 for crossflow cooling tower, which is characterized in that described low
The plate thickness of frequency perforated plate is 1-2mm, piercing aperture 0.5-1mm, punching rate 0.5-1.5%, and cavity depth is 300- after plate
600mm。
4. the air outlet micropore plate muffler according to claim 3 for crossflow cooling tower, which is characterized in that described low
The plate thickness of frequency perforated plate is 1.5mm, and piercing aperture 0.75mm, punching rate 1%, cavity depth is 476mm after plate.
5. the air outlet micropore plate muffler according to claim 1 for crossflow cooling tower, which is characterized in that the height
The resonant frequency of frequency perforated plate is 555HZ.
6. the air outlet micropore plate muffler according to claim 1 for crossflow cooling tower, which is characterized in that the height
The plate thickness of frequency perforated plate is 1-2mm, piercing aperture 0.4-0.8mm, punching rate 1.5-2.5%, and cavity depth is 55- after plate
80mm。
7. the air outlet micropore plate muffler according to claim 6 for crossflow cooling tower, which is characterized in that the height
The plate thickness of frequency perforated plate is 1.5mm, and piercing aperture 0.5mm, punching rate 2%, cavity depth is 69mm after plate.
8. the air outlet micropore plate muffler according to claim 1 for crossflow cooling tower, which is characterized in that described outer
Circle portion profile is octagon.
9. the air outlet micropore plate muffler according to claim 1 for crossflow cooling tower, which is characterized in that described low
Frequency perforated plate, high frequency perforated plate are aluminium sheet or galvanized sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721801008.3U CN207741597U (en) | 2017-12-21 | 2017-12-21 | A kind of air outlet micropore plate muffler for crossflow cooling tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721801008.3U CN207741597U (en) | 2017-12-21 | 2017-12-21 | A kind of air outlet micropore plate muffler for crossflow cooling tower |
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| Publication Number | Publication Date |
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| CN207741597U true CN207741597U (en) | 2018-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721801008.3U Active CN207741597U (en) | 2017-12-21 | 2017-12-21 | A kind of air outlet micropore plate muffler for crossflow cooling tower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007231A (en) * | 2017-12-21 | 2018-05-08 | 巴尔的摩冷却系统（苏州）有限公司 | A kind of air outlet micropore plate muffler for crossflow cooling tower |
-
2017
- 2017-12-21 CN CN201721801008.3U patent/CN207741597U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007231A (en) * | 2017-12-21 | 2018-05-08 | 巴尔的摩冷却系统（苏州）有限公司 | A kind of air outlet micropore plate muffler for crossflow cooling tower |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191030 Address after: Dalian high tech Industrial Park, 116000 Liaoning province Qixianling 65 Guang Xian Road Patentee after: B A C Dalian Co., Ltd. Address before: 215300 Yingbin Road 12, Zhou Shi Town, Kunshan City, Suzhou, Jiangsu Patentee before: Baltimore Cooling System (Suzhou) Co., Ltd. |