CN201730057U - Noise reduction device - Google Patents
Noise reduction device Download PDFInfo
- Publication number
- CN201730057U CN201730057U CN2009203525862U CN200920352586U CN201730057U CN 201730057 U CN201730057 U CN 201730057U CN 2009203525862 U CN2009203525862 U CN 2009203525862U CN 200920352586 U CN200920352586 U CN 200920352586U CN 201730057 U CN201730057 U CN 201730057U
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- cylindrical shell
- chamber
- reflection
- denoising device
- noise reduction
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- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The utility model relates to an air conduced noise absorption and reflection device for road or light rail transit traffic, in particular to a noise reduction device. The noise reduction device comprises a polyhedral cylinder which is divided into reflection chambers, upper end faces of the reflection chambers are opened on the upper surface of the cylinder, other end faces are closed, the reflection chambers are hollowed, and adjacent reflection chambers are portioned by frequency conduction plates. The noise reduction device is light in weight, strong in rigidity and free of eccentric torque, is impact resistant, anticorrosion, ageing resistant and insulating, can not absorb and collect water and can be recycled. The noise reduction device is made from ASA raw materials via injection molding, can be made of other light and durable materials, and can be used for realizing low-and-medium noise reduction effect.
Description
Technical field
The utility model relates to the noise absorption or the reflection unit through air transmitted of a kind of highway or light rail transit, relates in particular to a kind of device of noise reduction.
Background technology
Under the economic technology condition in modern times, making it reach the noise emission standard from source control noise is difficult to realize, general effective control measures is near the noise source place sound barrier to be set, and the engineering acoustics effect of its sound barrier is determined by the height of sound barrier usually.
There is following deficiency in the acoustic current barrier in using: 1) it highly is subjected to various condition restriction, and the diffraction sound of walking around the sound barrier upper limb is difficult to administer, and the sound barrier upper limb becomes the secondary noise source; 2) administer in the sound barrier engineering of traffic noise, the sound barrier that surpasses passenger's height of sighting line intercepts the passenger visual field, makes that the passenger produces that vision is dull, fatigue and sense of discomfort; 3) the aerodynamics noise of the train of the vehicles of high-speed cruising, especially high-speed cruising generation and aerodynamic force (speed wind) interact with impermeable sound barrier body of wall, influence the control of structural safety and noise; Especially the bottom noise of the train of high-speed cruising generation repeatedly reflection between relative sound barrier and train side, form concentrated sound source on sound barrier top, the concentrated sound source on top can be walked around the sound barrier top, so just greatly reduces the actual noise reduction of sound barrier; 4) along with the increase of sound barrier height, its engineering cost significantly improves, and the unit height sound barrier that the top increases is with respect to below same units height sound barrier, and its noise reduction significantly reduces.
Have in the prior art and adopt the resonance mode noise reduction, Chinese patent application as notice of authorization on the 4th November in 2009, notification number is CN201339164Y, it discloses a kind of new road sound barrier, its first laminate, second laminate, three ply board two side ends are fixed on the column, leave distance between first laminate, second laminate and form cavity body, uniform sound absorption hole on the plate face of first laminate, second laminate, three ply board, filling sucting sound material between second laminate, the three ply board.Though its noise reduction is better, there is not any difference with existing noise reduction sound barrier, still there is the above-mentioned defective of sound barrier.Be subjected to the influence of train wind bigger during use, and the eccentric throw of its installation is bigger, installs insecurely, cause unsafe factor.
The utility model content
Technique effect of the present utility model can overcome above-mentioned defective, and a kind of denoising device is provided, and its noise that sound source can well be propagated reduces, and especially to the secondary noise source on sound barrier top, good noise reduction is arranged.
For achieving the above object, the utility model adopts following technical scheme: it comprises polyhedral cylindrical shell, and inner barrel is interval with the reflection chamber, and the upper surface of each reflection chamber is opened on the cylindrical shell upper surface, and all the other each end faces all seal; Reflection cavity chamber interior hollow; Pass through guide plate interval frequently between the adjacent reflection chamber.
The cylindrical shell bilateral symmetry, the bottom of cylindrical shell is provided with the groove holder.The sound barrier of cylindrical shell and bottom is used in combination, and cylindrical shell is arranged on the sound barrier top, and the groove holder of cylindrical shell combines with sound barrier, can connect by bolt or alternate manner.Cylindrical shell is provided with absorbent treatment towards the bottom of a side of sound source, and absorbent treatment can the absorption portion high-frequency noise, is symmetrical arranged with sound barrier center, bottom, and is both attractive in appearance, not eccentric again.
This device is different from the sound insulation and noise reducing series products of present use, this denoising device is used same frequency reflective sound wave interference mechanism, partial noise being returned by the reflection chamber carry out in the former noise field eliminating the noise with interfering frequently, is the denoiser that belongs to passive noise elimination.It is dark that the reflection chamber of this denoiser is provided with the chamber by 1/4 wavelength physical dimension of the CF of noise source, the sound wave phase place of a certain noise frequency that enters this reflection chamber through being reflected in this device opening part and same frequency is just in time or near opposite, interfering mutually goes to zero this frequency acoustic pressure of opening part, the dark corresponding a plurality of frequency acoustic pressures of different cavity go to zero, and cause diffraction sound to reduce.
Each face of bottom of reflection chamber is the reflecting surface of complete closed.The surface of reflection chamber opening part is provided with dust guard, and dust guard adopts Air Filter or net dividing plate.Adjacent frequency guide plate can be arranged in parallel, also can non-parallelly be provided with.
The spacing of adjacent frequency guide plate is 4-12CM, and it is indoor that sound wave enters reflection cavity by the opening of the reflection chamber at adjacent frequency guide plate interval, through being spread out of by opening again after the reflection.
Angle between the extended line of adjacent frequency guide plate is 1 °-20 °.The shape of cylindrical shell does not limit, and under symmetrical shape, selects the main frequency of noise, by 1/4 of main frequency wavelength reflection cavity is set and gets final product deeply.The bottom of cylindrical shell is provided with the groove holder, is convenient to the fixing of cylindrical shell.Cylindrical shell respectively reflects the chamber bottom and is provided with and reflects the outfall that chamber is communicated with, and outfall can fully be discharged entering the indoor water of reflection cavity, can effectively avoid ponding to the damage of cylindrical shell or to the influence of sound wave.
Each reflection is interval with space bar along the cylindrical shell length direction in chamber, and the spacing of adjacent spaces plate is 5-25CM, can guarantee to enter the indoor sound wave of reflection cavity like this and all is normal incidence or near normal incidence, improve noise reduction.
The height of cylindrical shell is increased progressively to the centre gradually by two ends, and each reflects the degree of depth difference of chamber, the frequency difference of adaptation, the frequency range difference of noise reduction.
China's traffic circulation noise source spectral characteristic is based on wideband, and noise energy concentrates in certain frequency range.Find out influence noise intensity in the wide spectrum main frequency as the noise reduction frequency, can realize the purpose of noise reduction.This device is to the noise reduction effectively of the sound wave in certain band frequency, and the third-octave centre frequency between the 125Hz-2000Hz that the noise acoustic energy ratio is concentrated all has different effects, in, the low frequency noise reduction is better.
This denoising device is different from present Active Noise Control product, does not have complication systems such as electronic loop, and noise is taken from former noise source, through the denoising device reflection, makes phase place opposite, returns to interfere in the original sound field and eliminates the noise; Simple in structure, Maintenance free or maintenance are simple; Energy free consumes, the acoustic efficiency weatherproof.This installation weight≤20kg/m, and volume is little, and setting height(from bottom) is low, the suitable especially optimization improvement project that sound barrier is promptly arranged.When not improving the sound barrier height, its top installs this device additional, can add the above noise reduction of 4dB, is equivalent to improve indirectly the height of sound barrier.
Detect through multinomial compbined test, the noise reduction of denoising device mainly shows in the transitional region (also claiming gray area) and 125Hz～2000Hz frequency range between sound shadow region and clear zone, at the scene under the test conditions: from 15 meters of noise source horizontal ranges, be subjected in 9 meters scopes of sound point height, the additional noise reduction effect is more than the 4.0dB. owing to be symmetricly set on the sound barrier, square without acceptance of persons, safety is good.Effectively reduce of the negative effect of pneumatic power simultaneously, can be the passenger sufficient sightseeing visual condition is provided sound barrier safety.The purpose of realize that simultaneously noise reduction, vehicle window are penetrating, falling blast is an ideal product of administering traffic noise, can be widely used in noise reduction engineerings such as light rail, highway.
This installation weight is light, and rigidity is strong, the intensity height, and square, shock resistance, corrosion-resistant, ageing-resistant, insulation without acceptance of persons, ponding, reusable edible do not absorb water.This denoiser product also can be made by other lightweight, durable material with the injection mo(u)lding of ASA raw material, as long as adopt this structure, in can realizing, low noise reduction effect.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is done detailed description:
Fig. 1 is embodiment 1 structural representation of the present utility model;
Fig. 2 is that the multiple arrangement of embodiment 1 of the present utility model is in conjunction with the transversary schematic diagram;
Fig. 3 is the structural representation of the utility model embodiment 2.
The specific embodiment
This device comprises polyhedral cylindrical shell 1, and cylindrical shell 1 internal layout is provided with reflection chamber 2, and the upper surface of each reflection chamber 2 is opened on the upper surface of cylindrical shell 1, and all the other each end faces all seal; Reflection chamber 2 inner hollow; Pass through guide plate 3 intervals frequently between the adjacent reflection chamber 2.The sound wave that sound source is propagated enters reflection chamber 2 by opening 5, through reflection, is spread out of by opening 5, and the sound wave of same frequency meets in the position of opening 5 and original sound field, and with same frequency and reversed-phase interference step-down reaches the noise reduction purpose.
The height of cylindrical shell 1 is increased progressively to the centre gradually by the cylindrical shell two ends.Reflection chamber opening part dust guard is provided with dustproof grid 4 forms.The spacing of adjacent frequency guide plate 3 is 5-8CM.Cylindrical shell 1 is symmetrical set, and the bottom of cylindrical shell 1 is provided with groove holder 6.Adjacent frequency guide plate 3 parallel or non-parallel settings.Angle between the extended line of adjacent frequency guide plate is 1 °-20 °.
Along the cylindrical shell length direction fixing hole 10 is set, wire rope or round steel are used in combination by fixing hole 10 fixedly connected a plurality of cylindrical shells can being together in series between the adjacent cylindrical shell.
The downside of cylindrical shell is provided with and reflects the outfall 7 that chamber 2 is communicated with.
Be interval with space bar 11 along the cylindrical shell length direction in each reflection chamber 2, the spacing of adjacent spaces plate 11 is 15CM.
The bottom of reflection chamber 2 is provided with the cavity 8 of complete closed.The bottom of one side of cylindrical shell 1 is provided with absorbent treatment 9.
Other is with embodiment 1.
Claims (10)
1. a denoising device is characterized in that comprising polyhedral cylindrical shell, and inner barrel is interval with the reflection chamber, and the upper surface of each reflection chamber is opened on the cylindrical shell upper surface, and all the other each end faces all seal; Reflection cavity chamber interior hollow; Pass through guide plate interval frequently between the adjacent reflection chamber.
2. denoising device according to claim 1 is characterized in that the height of cylindrical shell is increased progressively to the centre gradually by the cylindrical shell two ends; Each reflects the degree of depth difference of chamber.
3. denoising device according to claim 2 is characterized in that reflecting the chamber open surfaces dust guard is set, and dust guard adopts Air Filter or net dividing plate.
4. denoising device according to claim 3, the spacing that it is characterized in that adjacent frequency guide plate is 4-12CM.
5. denoising device according to claim 4 is characterized in that cylindrical shell is symmetrical set, and the bottom of cylindrical shell is provided with the groove holder.
6. denoising device according to claim 5 is characterized in that adjacent frequency guide plate be arranged in parallel.
7. denoising device according to claim 5 is characterized in that the angle between the extended line of adjacent frequency guide plate is 1 °-20 °.
8. according to claim 6 or 7 described denoising devices, it is characterized in that cylindrical shell respectively reflects the chamber bottom and is provided with and reflects the outfall that chamber is communicated with; The bottom of cylindrical shell one side is provided with absorbent treatment.
9. denoising device according to claim 8 is characterized in that being interval with space bar along the cylindrical shell length direction in each reflection chamber, and the spacing of adjacent spaces plate is 5-25CM.
10. denoising device according to claim 1 is characterized in that along the cylindrical shell length direction fixing hole being set, and is fixedly connected by fixing hole by wire rope or round steel between the adjacent cylindrical shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203525862U CN201730057U (en) | 2009-12-30 | 2009-12-30 | Noise reduction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203525862U CN201730057U (en) | 2009-12-30 | 2009-12-30 | Noise reduction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201730057U true CN201730057U (en) | 2011-02-02 |
Family
ID=43521214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203525862U Ceased CN201730057U (en) | 2009-12-30 | 2009-12-30 | Noise reduction device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201730057U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105755972A (en) * | 2016-03-02 | 2016-07-13 | 袁地保 | Combined sound absorption cap |
| CN108396668A (en) * | 2018-03-23 | 2018-08-14 | 上海交通大学 | Denoising structure at the top of the anti-diffraction sound barrier of low frequency |
| CN109112983A (en) * | 2018-09-29 | 2019-01-01 | 哈尔滨工业大学 | Compound sound barrier top denoising device |
| CN109112982A (en) * | 2018-09-29 | 2019-01-01 | 哈尔滨工业大学 | Enhance diffraction type sound barrier top denoising device |
| CN109137766A (en) * | 2018-09-29 | 2019-01-04 | 哈尔滨工业大学 | Asymmetric enhances diffraction type sound barrier top denoising device |
| CN113981847A (en) * | 2021-10-29 | 2022-01-28 | 山西尚风抑风墙科技有限公司 | Sound barrier sound absorption cap |
-
2009
- 2009-12-30 CN CN2009203525862U patent/CN201730057U/en not_active Ceased
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105755972A (en) * | 2016-03-02 | 2016-07-13 | 袁地保 | Combined sound absorption cap |
| CN105755972B (en) * | 2016-03-02 | 2019-08-27 | 西藏中驰集团股份有限公司 | Combined type sound absorption cap |
| CN108396668A (en) * | 2018-03-23 | 2018-08-14 | 上海交通大学 | Denoising structure at the top of the anti-diffraction sound barrier of low frequency |
| CN109112983A (en) * | 2018-09-29 | 2019-01-01 | 哈尔滨工业大学 | Compound sound barrier top denoising device |
| CN109112982A (en) * | 2018-09-29 | 2019-01-01 | 哈尔滨工业大学 | Enhance diffraction type sound barrier top denoising device |
| CN109137766A (en) * | 2018-09-29 | 2019-01-04 | 哈尔滨工业大学 | Asymmetric enhances diffraction type sound barrier top denoising device |
| CN113981847A (en) * | 2021-10-29 | 2022-01-28 | 山西尚风抑风墙科技有限公司 | Sound barrier sound absorption cap |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Qingdao Bai Kun Technology Co., Ltd. Assignor: Pu Tai Shan Contract record no.: X2019370010002 Denomination of utility model: Noice reducing apparatus with color signal Granted publication date: 20110202 License type: Common License Record date: 20190903 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110202 |
|
| CX01 | Expiry of patent term | ||
| IW01 | Full invalidation of patent right |
Decision date of declaring invalidation: 20200623 Decision number of declaring invalidation: 45025 Granted publication date: 20110202 |
|
| IW01 | Full invalidation of patent right |