CN205230579U - Compound noise eliminator in ventilation tunnel - Google Patents
Compound noise eliminator in ventilation tunnel Download PDFInfo
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- CN205230579U CN205230579U CN201520723114.9U CN201520723114U CN205230579U CN 205230579 U CN205230579 U CN 205230579U CN 201520723114 U CN201520723114 U CN 201520723114U CN 205230579 U CN205230579 U CN 205230579U
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Abstract
Compound noise eliminator in ventilation tunnel to effectively restrain original noise, and effective control ventilation tunnel fan power, energy saving and reduction ventilation tunnel running cost. It includes sound absorption formula silencer and the active silencer of unit initiative, sound absorption formula silencer is fixed to be set up in the ventilation tunnel, and sound absorption formula silencer constitutes by arrange the passageway unit of arranging in the full section in the ventilation tunnel, and each passageway unit has the passageway that extends along ventilation tunnel axis, the fixed setting in each passageway unit of the active silencer of unit initiative, and be located the middle part or the rear portion of passageway.
Description
Technical field
The utility model relates to tunnel, particularly a kind of ventilation tunnel composite sound damping device passive for impedance type noise elimination and active noise elimination combined.
Background technology
Along with industrial expansion, noise pollution is listed in three large Environmental Pollution sources together with air pollution, water pollutions, has become a worldwide problem.For a long time, people constantly find the effective ways of Noise measarement.In conventional noise controls, mainly adopt the passive sound reduction methods such as sqouynd absorption lowering noise, impedance bundary, sound insulation and noise reducing.
At present, the Noise measarement of ventilation tunnel mainly adopts the method arranging resistance sound suppressor.Resistance sound suppressor is applied to ventilation tunnel and mainly there are following two problems, and one is that the inhibition of resistance sound suppressor to low-frequency noise is very poor, and along with the reduction of noise frequency, the volume of resistance sound suppressor becomes huge, and cost increases thereupon; The two resistance sound suppressors be mounted in ventilation tunnel can take larger ventilation tunnel available ventilation cross section, larger resistance can be produced, cause the pressure loss, for keeping air draft or the air feed wind speed of requirement, just must increase the power of blower fan, cause ventilation tunnel construction cost and operating cost to increase.In addition, the increase of power of fan can make the noise of blower fan raise on the contrary.
Initiatively Active Noise Control technology also makes initiatively noise cancellation technology ANC (ActiveNoiseControl) be proposed in 1933 by roentgen PaulLeug the earliest, by acquisition noise signal after phase shift, gain process, discharge but secondary noise that phase place contrary and raw noise identical with raw noise sonic wave amplitude to offset, thus reach the object of stress release treatment.
Because the raw noise source of ventilation tunnel is very complicated, very large difference is there is in the raw noise that ventilation tunnel cross section various point locations passes through in intensity, characteristic, if therefore existing active Active Noise Control technology directly applies in the sound-deadening and noise-reducing of ventilation tunnel, although technically can realize, but intractability is comparatively large, and cost will increase considerably.Therefore, the report that ventilation tunnel adopts initiatively noise elimination technique is had not yet to see up to now.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of ventilation tunnel composite sound damping device, effectively to suppress raw noise, and effectively controls ventilation tunnel power of fan, economize energy and reduction ventilation tunnel operating cost.
The utility model solves the technical scheme that its technical matters adopts:
Ventilation tunnel composite sound damping device of the present utility model, is characterized in that: it comprises sound absorption formula sound suppressor and unit initiatively active silencer; Described sound absorption formula sound suppressor is fixedly installed in ventilation tunnel, and sound absorption formula sound suppressor is made up of the channel unit of arranged in tunneling boring in ventilation tunnel, and each channel unit has the passage along ventilation tunnel Axis Extension; Described unit initiatively active silencer is fixedly installed in each channel unit, and is positioned at middle part or the rear portion of passage.
The annular inner wall of described channel unit covers and is fixed with micropore sound absorbing layer.
The beneficial effects of the utility model are, passive for sound absorption formula noise elimination and active noise elimination are combined, by sound absorption formula sound suppressor, tunnel cross-section is carried out blocking decomposition, the raw noise entered in unit passage can be considered as single sound source approx, by correspondence unit initiatively active silencer noises elimination carried out to the raw noise by this unit channel process, active active noise elimination treatment technology is applied in ventilation tunnel become simplification and effective; Compare with existing resistance sound suppressor, significantly can reduce the ventilation tunnel cross section shared by noise-abatement equipment, simultaneously, because windage is less, ventilation tunnel can the blower fan of selection of small power, not only economize energy, reduce costs, further reduce noise treatment difficulty; Channel unit inwall covers micropore sound absorbing layer is set, the intractability of unit active active silencer can be reduced further and improve soundproof effect.
Accompanying drawing explanation
This instructions comprises following three width accompanying drawings:
Fig. 1 is the structural representation of the utility model ventilation tunnel composite sound damping device;
Fig. 2 is the structural representation cross-sectional view of the utility model ventilation tunnel composite sound damping device;
Fig. 3 is the part sectioned view of the utility model ventilation tunnel composite sound damping device channel unit.
Parts, toponym and corresponding mark in figure: sound absorption formula sound suppressor 10, channel unit 11, micropore sound absorbing layer 12, unit initiatively active silencer 20.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
See figures.1.and.2, the utility model ventilation tunnel composite sound damping device comprises sound absorption formula sound suppressor 10 and unit initiatively active silencer 20.Described sound absorption formula sound suppressor 10 is fixedly installed in ventilation tunnel, and sound suppressor 10 is made up of the channel unit 11 of arranged in tunneling boring in ventilation tunnel, and each channel unit 11 has the passage along ventilation tunnel Axis Extension.Described unit initiatively active silencer 20 is fixedly installed in each channel unit 11, and is positioned at middle part or the rear portion of passage.Namely by sound absorption formula sound suppressor 10, tunnel cross-section is carried out blocking decomposition, the raw noise entered in unit passage 11 can be considered as single sound source approx after sqouynd absorption lowering noise process, by correspondence unit initiatively active silencer 20 noises elimination carried out to the noise by this unit channel process, active active noise elimination treatment technology is applied in technical ventilation tunnel becomes simplification and effective.
Compare with existing resistance sound suppressor, the utility model significantly can reduce the ventilation tunnel available ventilation cross section shared by noise-abatement equipment, simultaneously, because windage diminishes, ventilation tunnel can the blower fan of selection of small power, not only economize energy, reduce costs, further reduce noise treatment difficulty.For the subway ventilation tunnel of sectional area about 20 square metres, conventional design vent flow is 120 cubes of meter per seconds, according to Conventional impedance formula sound suppressor, then needs the ventilation blower of employing two power about 90 kilowatts.According to combined type sound-attenuating system of the present utility model, when design conditions is constant, then only need the ventilation blower of two power 55 kilowatts to meet the demands, energy-saving effect is obvious.
With reference to Fig. 3, the annular inner wall of described channel unit 11 covers and is fixed with micropore sound absorbing layer 12, the intractability of unit active active silencer can be reduced further and improve soundproof effect.
Some principles of the above the utility model ventilation tunnel composite sound damping device that just explains through diagrams, be not the utility model to be confined to shown in and in described concrete structure and the scope of application, therefore every corresponding modify of being likely utilized and equivalent, all belong to the scope of the claims that the utility model is applied for.
Claims (2)
1. ventilation tunnel composite sound damping device, is characterized in that: it comprises sound absorption formula sound suppressor (10) and unit initiatively active silencer (20); Described sound absorption formula sound suppressor (10) is fixedly installed in ventilation tunnel, sound suppressor (10) is made up of the channel unit (11) of arranged in tunneling boring in ventilation tunnel, and each channel unit (11) has the passage along ventilation tunnel Axis Extension; Described unit initiatively active silencer (20) is fixedly installed in each channel unit (11), and is positioned at middle part or the rear portion of passage.
2. ventilation tunnel composite sound damping device as claimed in claim 1, is characterized in that: the annular inner wall of described channel unit (11) covers and is fixed with micropore sound absorbing layer (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520723114.9U CN205230579U (en) | 2015-09-17 | 2015-09-17 | Compound noise eliminator in ventilation tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520723114.9U CN205230579U (en) | 2015-09-17 | 2015-09-17 | Compound noise eliminator in ventilation tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205230579U true CN205230579U (en) | 2016-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520723114.9U Active CN205230579U (en) | 2015-09-17 | 2015-09-17 | Compound noise eliminator in ventilation tunnel |
Country Status (1)
| Country | Link |
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| CN (1) | CN205230579U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105139844A (en) * | 2015-09-17 | 2015-12-09 | 四川迈铁龙科技有限公司 | Composite noise elimination apparatus for ventilation tunnel |
-
2015
- 2015-09-17 CN CN201520723114.9U patent/CN205230579U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105139844A (en) * | 2015-09-17 | 2015-12-09 | 四川迈铁龙科技有限公司 | Composite noise elimination apparatus for ventilation tunnel |
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