CN202831277U - Directional noise reduction device - Google Patents
Directional noise reduction device Download PDFInfo
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- CN202831277U CN202831277U CN 201220496801 CN201220496801U CN202831277U CN 202831277 U CN202831277 U CN 202831277U CN 201220496801 CN201220496801 CN 201220496801 CN 201220496801 U CN201220496801 U CN 201220496801U CN 202831277 U CN202831277 U CN 202831277U
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Abstract
The utility model discloses a directional noise reduction device which comprises a main structure, a diversion silencing cylinder, a ventilation silencing device and sound insulation barriers. The main structure encloses the lateral sides, not facing a work target, of a noise equipment area. Only the lateral side, facing the work target, of the noise equipment area is opened. The noise equipment area is an area which is provided with one or more work devices serving as noise sources. The diversion silencing cylinder is installed at the top of the one or more work devices serving as the noise sources. The ventilation silencing device is installed between the noise equipment area and the work target. Each sound insulation barrier is installed between two adjacent work devices in the noise equipment area. The directional noise reduction device has the advantages of being stable, reliable and effective in directional noise reduction, simple in structure, and convenient to operate and apply.
Description
Technical field
The utility model relates to a kind of directed denoising device.
Background technology
Directed noise reduction namely carries out Noise Treatment for the most obvious zone of noise reduction in the noise abatement space.The meaning of directed noise reduction is to seek optimal solution in various noise abatement schemes.Directed noise reduction is suitable for the improvement of more stable noise source (such as point sound source).
Therefore, need a kind of directed denoising device.
The utility model content
In order to address the deficiencies of the prior art, the utility model provides a kind of directed denoising device.Its purpose is: more stably, reliably, effectively carry out directed noise reduction.
For achieving the above object, the utility model is taked following technical scheme:
A kind of directed denoising device is applied in the occasion that noise source is working equipment, comprising:
Agent structure, agent structure is sealed towards the side outside the target the noise battery limits, only the noise battery limits is opened wide towards the side of target; The noise battery limits refer to have the zone as one or more working equipments of noise source;
The guide flow noise elimination cylinder, it is installed in the top as one or more working equipments of noise source;
Ventilating noise silencer, it is installed between noise battery limits and the described target; And
Noise barrier, it is installed between two adjacent in noise battery limits working equipments.
Preferably, agent structure is the sound absorption reduction structure.
Preferably, noise barrier is the removable sound isolation screen barrier that does not affect the intake of working equipment.
Preferably, the noise battery limits are the air cooler district, and target is the compressor factory building, are air cooler as one or more working equipments of noise source.
The utility model is owing to take above-described technical scheme, and it comprises following advantage: can be more stably, reliably, directed noise reduction effectively, and simple in structure, operational applications is convenient.
Description of drawings
Fig. 1 is the structural representation of the directed denoising device of an embodiment of the present utility model.
Fig. 2 is the top plan view of the directed denoising device of an embodiment of the present utility model.
Among the figure:
1, agent structure, 2, the guide flow noise elimination cylinder, 3, ventilating noise silencer, 4, the noise battery limits, 5, target, 6, working equipment, 7, noise barrier.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described further.
Fig. 1 is the structural representation of the directed denoising device of an embodiment of the present utility model.Fig. 2 is the top plan view of directed denoising device.As shown in Figure 1 and Figure 2, a kind of directed denoising device is applied in the occasion that noise source is working equipment, comprising:
Agent structure, agent structure is sealed towards the side outside the target the noise battery limits, only the noise battery limits is opened wide towards the side of target; The noise battery limits refer to have the zone as one or more working equipments of noise source;
The guide flow noise elimination cylinder, it is installed in the top as one or more working equipments of noise source;
Ventilating noise silencer, it is installed between noise battery limits and the described target; And
Noise barrier, it is installed between two adjacent in noise battery limits working equipments.
Selectively, agent structure can be not limited to this during realization for the sound absorption reduction structure, can also be other the structure that can play decrease of noise functions.
Selectively, noise barrier can be not limited to this during realization for the removable sound isolation screen barrier of the intake that do not affect working equipment, can also be the noise barrier of other structures.
During realization, the distance between noise battery limits and the target must greater than 5m, have enough incoming air areas to guarantee the noise battery limits, thereby guarantee enough intakes.
The guide flow noise elimination cylinder has also solved the hot air reflux problem in the exhaust air rate and noise reduction value guaranteed as one or more working equipments of noise source.
Ventilating noise silencer has been guaranteed the soundproof effect of radial direction, and has satisfied the air intake demand as one or more working equipments of noise source.
Noise barrier has been guaranteed the soundproof effect of axial direction, and guarantees not affect the air intake as one or more working equipments of noise source.
During specific implementation, the noise battery limits can be the air cooler district, and target can be the Compressors Factory room, can be air cooler as one or more working equipments of noise source, can also be applicable to other target and working equipment.
Comprise the occasion of noise battery limits for any one, can adopt such apparatus structure to realize directed noise reduction.
Use example
The noise reduction of certain boiler room, administer engineering as example take the oil field Noise of boiler room:
Three different exemplary position survey mark A, B, C carry out noise testing in door and window is in the situation of closing the workshop, draw administer before the noise testing data:
| Measuring point | A | B | C |
| Sound pressure level dB (A) | 89.6 | 89.9 | 82.1 |
This workshop is color steel room structure, and equipment has two cover wet steam generator and water treatment facilities in it.Main Noise Sources is the strong noise that air compressor machine, pump in the plug and the blower fan in the running sends.By analyzing, its main noise has following several respects:
1. mechanical noise: mechanical noise derives from the alternating force between the mechanical part.The construct noise of the impact noise that equipment produces in the middle of mechanical movement, frictional noise, structural vibration radiation etc.
2. electromagnetic noise: uneven electromagnetic force makes motor produce electric and magnetic oscillation and electromagnetic radiation noise.
3. pipeline noise: when liquid is flowed through pipeline, because the pressure disturbance that turbulent flow and friction excite also can produce noise.
By analysis, can think that noise in the workshop is the direct sound that is formed by stacking of noise that a plurality of point sound sources send and is formed by stacking with reverberation sound after the metope reflection.Because machine noise propagates into passageway that the workman often patrols and examines mainly take direct sound as main, so need do noise barrier around machine.
Noise abatement scheme (noise reduction):
Through above analysis, the boiler room is carried out noise abatement can take sound absorption reduction and sound insulation and noise reducing.
Sound absorption reduction: sound absorption is the phenomenon that sound wave strikes energy loss behind the material surface, and sound absorbing mechanism is the hole that material internal has a large amount of small connections, and sound wave can go deep into material internal along these spaces, with material generation rubbing action acoustic energy is converted into heat energy.
Sound insulation and noise reducing: around sound source, barrier is installed and is intercepted direct sound, reduce room noise.If barrier can not enclose sound source, because the reflection of diffraction and room smallpox, side wall, noise reduction not exclusively depends on the sound insulation property of barrier.When being hard reflecting surface on the smallpox side wall, the effect of sound insulation and noise reducing often only has 5～8dB (A), if barrier surface is when being equipped with strong sound absorption material on a side of sound source and smallpox, the side wall, the sound insulation and noise reducing effect can reach 15～20dB (A), and barrier is nearer apart from sound source, and noise reduction is better.
Based on above analysis, determine that the main control measures in the boiler room is used for the combination of laying sound absorption material and noise barrier.The noise abatement scheme of this factory building is as follows:
Scheme one: do not lay sound absorption material at the factory building inner surface, noise barrier only is installed around wet steam generator.
Scheme two: completely spread sound absorption material at factory building side wall and top, and around wet steam generator, noise barrier is installed.
Scheme three: only lay sound absorption material at the factory building top, and noise barrier is installed around wet steam generator.
Scheme four: only lay sound absorption material at factory building side wall, and around wet steam generator, noise barrier is installed.
Four kinds of schemes are carried out respectively simulation of acoustic field, drawn implement four kinds after the scheme the noise maximum value and minimum value and the sound absorption area comparison:
| Minimum value (dBA) | Maximum value (dBA) | Remarks | |
| Scheme one | 77 | 95.3 | |
| Scheme two | 60 | 94 | |
| Scheme three | 69 | 94 | |
| Scheme four | 73 | 95 |
By above-mentioned simulation drawing and noise statistics table as can be known, the noise abatement effect of scheme two is best, and scheme three has reached cost control when satisfying the noise abatement requirement.
Actual improvement verified:
According to the result of simulation of acoustic field, taked scheme three to carry out noise abatement to this boiler room.Through the comprehensive regulation of roof sound absorption technique and noise barrier, the noise testing data are after the improvement in the boiler room:
| Measuring point | A | B | C |
| Sound pressure level dB (A) | 75.2 | 78 | 68.2 |
The directed Noise Treatment structure of scheme three has been taked in the boiler room, has reached the regulation effect of estimating, and is basically identical with the analog result of simulation of acoustic field software.
Obviously, those skilled in the art deliberately carries out various changes and modification to the utility model and does not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then the utility model also is intended to comprise these changes and modification interior.
Claims (4)
1. a directed denoising device is applied in the occasion that noise source is working equipment, it is characterized in that, comprising:
Agent structure, described agent structure is sealed towards the side outside the target the noise battery limits, only described noise battery limits is opened wide towards the side of target; Described noise battery limits refer to have the zone as one or more working equipments of noise source;
The guide flow noise elimination cylinder, it is installed in the top of described one or more working equipments as noise source;
Ventilating noise silencer, it is installed between described noise battery limits and the described target; And
Noise barrier, it is installed between two adjacent in described noise battery limits working equipments.
2. device according to claim 1, it is characterized in that: described agent structure is the sound absorption reduction structure.
3. device according to claim 1 is characterized in that: described noise barrier is the removable sound isolation screen barrier of the intake that do not affect described working equipment.
4. each described device in 3 according to claim 1, it is characterized in that: described noise battery limits are the air cooler district, and described target is the compressor factory building, and described one or more working equipments as noise source are air cooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220496801 CN202831277U (en) | 2012-09-26 | 2012-09-26 | Directional noise reduction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220496801 CN202831277U (en) | 2012-09-26 | 2012-09-26 | Directional noise reduction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202831277U true CN202831277U (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220496801 Expired - Lifetime CN202831277U (en) | 2012-09-26 | 2012-09-26 | Directional noise reduction device |
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| CN (1) | CN202831277U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109818451A (en) * | 2019-04-02 | 2019-05-28 | 吴光明 | A kind of sound absorbing-insulating barrier for large-size machine noise abatement |
| CN110236318A (en) * | 2019-07-19 | 2019-09-17 | 上海市环境科学研究院 | A kind of outdoor noise reduction Relaxing chair based on sound Subjective Intervention |
-
2012
- 2012-09-26 CN CN 201220496801 patent/CN202831277U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109818451A (en) * | 2019-04-02 | 2019-05-28 | 吴光明 | A kind of sound absorbing-insulating barrier for large-size machine noise abatement |
| CN110236318A (en) * | 2019-07-19 | 2019-09-17 | 上海市环境科学研究院 | A kind of outdoor noise reduction Relaxing chair based on sound Subjective Intervention |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130327 |
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| CX01 | Expiry of patent term |