CN201635022U

CN201635022U - Composite noise reduction device

Info

Publication number: CN201635022U
Application number: CN2009203525877U
Authority: CN
Inventors: 朴太善
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-12-30
Filing date: 2009-12-30
Publication date: 2010-11-17
Anticipated expiration: 2019-12-30

Abstract

The utility model relates to a composite noise reduction device, which is disposed between a noise source side and a protected side. The composite noise reduction device comprises a polygonal barrel, the barrel includes an acoustic-pat differential barrel and a resistant barrel which are connected together, the resistant barrel is positioned on the upper left of the acoustic-pat differential barrel which is hollow, two ends of the acoustic-pat differential barrel are respectively provided with an incoming port and an interference port, the incoming port is arranged on the left side of the acoustic-pat differential barrel and faces the noise source side, the interference port is disposed on the upper right side of the acoustic-pat differential barrel and faces the upper side of a noise protected side, the incoming port is communicated with an incoming chamber, the interference port is communicated with an outgoing chamber, the incoming chamber and the outgoing chamber are communicated with each other through pilot frequency cavities, the adjacent pilot frequency cavities are isolated from each other through acoustic-path difference frequency guide boards, reflection chambers are alternately arranged inside the resistant barrel, openings of the upper end faces of the reflection chambers are positioned on the surface of the resistant barrel, while other end faces are closed, the reflection chambers are hollow, and the adjacent reflection chambers are isolated from each other through a resistant frequency guide board. The composite noise reduction device is resistant to shock and corrosion.

Description

Compound denoising device

Technical field

The utility model relates to the noise absorption or the reflection unit through air transmitted of a kind of railway or highway communication, relates in particular to a kind of compound denoising device.

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 are the following problems during the acoustic current barrier was used and deficiency: 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 interference mode noise reduction, as disclosed Chinese patent application on May 7th, 2008, publication number is CN101175887A, it discloses a kind of sound arrester, to have according to the rules angular bend and to the sound-insulating member of polyhedral strip of sound source one side opening, stack gradually between the pillar that is standing at interval according to the rules, constitute sound-proof wall with suitable height, the sound wave that transmits from sound source is repeatedly reflected by polyhedron, by mutual interference, thereby make noise reduce.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.

Also 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 compound denoising device is provided, and its noise that sound source can well be propagated reduces.

For achieving the above object, the utility model adopts following technical scheme: this device is arranged between the sound source side and protection side of noise, comprise polyhedral cylindrical shell, cylindrical shell comprises path difference cylindrical shell and the resistance cylindrical shell that links together, and the resistance cylindrical shell is positioned at the upper left side of path difference cylindrical shell; Path difference inner barrel hollow, the two ends of path difference cylindrical shell are respectively equipped with the entrance port and interfere mouth, and the entrance port is arranged on the left side of path difference cylindrical shell, towards the noise source side; Interfere mouth to be arranged on the upper right side of path difference cylindrical shell, protect the side top towards noise; The entrance port is communicated with the incident chamber, interfere mouthful to be communicated with and penetrate a chamber, and the incident chamber is communicated with penetrating between the chamber by leading chamber frequently, passes through sound path difference frequency guide plate interval between the adjacent frequency leading chamber; The resistance inner barrel is interval with reflection cavity, and the upper surface of each reflection cavity is opened on the resistance drum surface, and all the other each end faces all seal; The reflection cavity inner hollow; Pass through resistance guide plate interval frequently between the adjacent reflection cavity.

Cylindrical shell need be used in combination with the sound barrier of bottom usually, and cylindrical shell is arranged on the sound barrier top, and the cylindrical shell bottom combines with sound barrier, can pass through bolt, riveted joint or alternate manner and connect.Be respectively equipped with outfall in each chamber bottom on the cylindrical shell, outfall can will enter water in the chamber discharge, avoid ponding to the damage of cylindrical shell or to the influence of sound wave.Along the cylindrical shell length direction fixing hole is set, wire rope or round steel are connected with the sound barrier column by fixing hole is fixing between the adjacent cylindrical shell, a plurality of cylindrical shells can be together in series, and are used in combination.

The spacing of adjacent sound path difference frequency guide plate is 4-15CM, and sound path difference frequency guide plate is an arc, and all arc sound path difference frequency guide plates are concentric arc, and the center of circle of promptly all arc sound path difference frequency guide plates is identical.

This device is different from the sound insulation and noise reducing series products of present use, the path difference cylindrical shell of this device is based on the sound wave interference principle, using path difference mechanism, make in the noise source partial noise return to interfere in the former noise field by chamber and eliminate the noise, is to belong to the denoiser that passive interference is eliminated the noise.Path difference an actor's rendering of an operatic tune forms many groups bypass of different sound paths on the sound field propagation path, acoustic wave segment is branched off in the bypass.The length of bypass is than the big numerical value of primary path (original sound field path) length, this numerical value makes the sound wave phase place opposite just, when the sound wave of primary path and bypass when the sound field of interfering mouthful position is met, because certain frequency sound wave phase place is just the opposite, cancel each other, reach the purpose of noise elimination.

In the resistance cylindrical shell, the adjacent resistance spacing of guide plate frequently is 5-20CM, and the resistance cylindrical shell face of reflection cavity opening forms a left side low right high arcwall face or plane; The chamber of reflection cavity deeply from left to right increases successively, 1/4 wavelength of dominant frequency in the corresponding noise spectrum of its intrinsic frequency and being provided with.Resistance frequently guide plate can be arranged in parallel as required, also can non-parallelly be provided with, promptly adjacent resistance frequently guide plate be arranged in parallel or adjacent resistance frequently the angle between the extended line of guide plate be 1 °-20 °.The reflection cavity opening part is provided with dust guard, and dust guard adopts Air Filter or net dividing plate.Sound wave is entered in the reflection cavity by the opening of the reflection cavity at adjacent frequency guide plate interval, through being spread out of by opening again after the reflection, at opening part and identical or close frequencies sound wave interference, the acoustic pressure of opening part is gone to zero, and realizes the step-down noise elimination.

Be interval with space bar along the cylindrical shell length direction in each reflection cavity, the spacing of adjacent spaces plate is 5-25CM, makes to enter the interior sound wave normal incidence of reflection cavity or near normal incidence, improve the structural strength and the rigidity of this cylindrical shell.

This device adopts two acoustics mechanism, and two kinds of cylindrical shells are compound, realized the wider frequency range noise reduction.Cylindrical shell top resistance drum surface is through the reflected sound wave interference and middle and high frequency field acoustic pressure approaches zero.Interfere cylindrical shell to make low, mid-frequency noise through the different an actor's rendering of an operatic tune of sound path and phase place is opposite, form in the cylindrical shell upper right side and interfere, improve the noise reduction height, enlarge the sound shadow region.Be provided with the cavity of complete closed between path difference an actor's rendering of an operatic tune and the reflection cavity.

China's Running Train Noise source spectral characteristic is based on wideband, and the railroad noise concentration of energy is in certain frequency range.This device is according to spectral characteristic, the main frequency of traffic noise, and design is pointedly used, and to the noise reduction effectively of the sound wave in certain band frequency, can effectively control the third-octave centre frequency noise component(s) between the 125Hz-2000Hz that acoustic energy relatively concentrates.

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, changes its phase place through denoising device, returns in the original sound field and eliminates the noise; Simple in structure, Maintenance free or maintenance are simple; Energy free consumes, no sound absorption material, and acoustical behavior is stable.The control of the aerodynamic noise that suitable especially train high-speed cruising produces can reduce the negative effect of train wind to constructional device.The suitable especially optimization engineering that sound barrier is promptly arranged of this device, under the prerequisite that does not change original sound barrier height, form, after its top installs this device additional, can improve the noise reduction 4.5dB of sound barrier, be equivalent to improve the additional noise reduction effect of the tangible height 2m of sound barrier.

Detect through multinomial compbined test, the noise reduction of this denoising device mainly shows in the transitional region (also claiming gray area) and 125Hz～4000Hz frequency range between sound shadow region and clear zone, at the scene under the test conditions: from 20 meters of sound barrier horizontal ranges, be subjected in 9 meters scopes of sound point height, the additional noise reduction effect is more than 4.5dB, 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 railway, highway.

This installation weight is light, and rigidity is strong, the intensity height, eccentricity is little, shock resistance, corrosion-resistant, ageing-resistant, the insulation, ponding, reusable edible do not absorb water.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is done detailed description:

Fig. 1 is the structural representation of embodiment 1 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.

The specific embodiment

Embodiment 1

This device is arranged between the sound source side and protection side of noise, comprises polyhedral cylindrical shell, and cylindrical shell comprises the path difference cylindrical shell 1 and resistance cylindrical shell 2 that links together, and resistance cylindrical shell 2 is positioned at the upper left side of path difference cylindrical shell 1; Path difference cylindrical shell 1 inner hollow, the two ends of path difference cylindrical shell 1 are respectively equipped with entrance port 101 and interfere mouth 102, and entrance port 101 is arranged on the left side of path difference cylindrical shell 1, towards the noise source side; Interfere mouth 102 to be arranged on the upper right side of path difference cylindrical shell 1, protect the side top towards noise; Entrance port 101 is communicated with incident chambers 103, interfere mouthfuls 102 to be communicated with and to penetrate chambers 104, and incident chamber 103 is communicated with penetrating between the chamber 104 by leading chamber 105 frequently, passes through sound path difference frequency guide plate 106 intervals between the adjacent frequency leading chamber 105; Resistance cylindrical shell 2 internal layouts are provided with reflection cavity 201, and the upper surface of each reflection cavity 201 is opened on the resistance drum surface, and all the other each end faces all seal setting; Reflection cavity 201 inner hollow; Pass through resistance guide plate 202 intervals frequently between the adjacent reflection cavity 201.

The spacing of adjacent sound path difference frequency guide plate 106 is 6-8CM, and sound path difference frequency guide plate 106 adopts arcuate structure, and all arc sound path difference frequency guide plates 106 are concentric arc.The adjacent resistance spacing of guide plate 202 frequently is 7-9CM, and adjacent resistance guide plate 202 frequently be arranged in parallel, and the resistance cylindrical shell face of reflection cavity opening forms the low right high arcwall face in a left side; The chamber of reflection cavity 201 deeply from left to right increases successively.Resistance guide plate 202 frequently adopts slabbed construction.Frequently be provided with the cavity 3 of complete closed between leading chamber 105 and the reflection cavity 201.Drum surface is interval with reinforcing rib 4; Cylindrical shell is provided with the outfall 5 that is communicated with reflection cavity 201 with frequency leading chamber 105.

The resistance length of guide plate 202 frequently from left to right increases successively, and promptly the height of resistance frequency guide plate 202 is increased progressively gradually by noise source side direction protection side.Be interval with space bar 203 along the cylindrical shell length direction in each reflection cavity 201; The reflection cavity opening part is provided with dust guard and is set to Air Filter 204.

The sound wave of interference portion enters incident chamber 103 by entrance port 101, entering each by 103 fens sound channels of incident chamber spreads out of by penetrating chamber 104 105 backs, leading chamber frequently, interfere with the sound wave in the original sound field that does not enter in the entrance port 101 in the position of interfering mouth 102, reach the noise reduction purpose.

The sound wave of resistance part enters reflection cavity 201 by opening, through reflection, spread out of by opening, and the sound wave of same frequency meets in the position of opening and original sound field, reaches the noise reduction purpose.

Along the cylindrical shell length direction fixing hole 6 is set, wire rope or round steel are fixedly connected by fixing hole 6 between the adjacent cylindrical shell.

Embodiment 2

The adjacent resistance angle between the extended line of guide plate 3 frequently is 4 °-8 °, reflection cavity upper end open and the resistance drum surface that forms is the plane.The dust guard of reflection cavity 201 opening parts adopts waffle slab.

Other is with embodiment 1.

Claims

1. compound denoising device, this device are arranged between the sound source side and protection side of noise, it is characterized in that comprising polyhedral cylindrical shell, and cylindrical shell comprises path difference cylindrical shell and the resistance cylindrical shell that links together, and the resistance cylindrical shell is positioned at the upper left side of path difference cylindrical shell; Path difference inner barrel hollow, the two ends of path difference cylindrical shell are respectively equipped with the entrance port and interfere mouth, and the entrance port is arranged on the left side of path difference cylindrical shell, towards the noise source side; Interfere mouth to be arranged on the upper right side of path difference cylindrical shell, protect the side top towards noise; The entrance port is communicated with the incident chamber, interfere mouthful to be communicated with and penetrate a chamber, and the incident chamber is communicated with penetrating between the chamber by leading chamber frequently, passes through sound path difference frequency guide plate interval between the adjacent frequency leading chamber; The resistance inner barrel is interval with reflection cavity, and the upper surface of each reflection cavity is opened on the resistance drum surface, and all the other each end faces all seal; The reflection cavity inner hollow; Pass through resistance guide plate interval frequently between the adjacent reflection cavity.

2. compound denoising device according to claim 1 is characterized in that sound path difference frequency guide plate is an arc, and all arc sound path difference frequency guide plates are concentric arc.

3. compound denoising device according to claim 2, the spacing that it is characterized in that adjacent sound path difference frequency guide plate is 4-15CM.

4. compound denoising device according to claim 1 is characterized in that the spacing of adjacent resistance frequency guide plate is 5-20CM.

5. compound denoising device according to claim 4, it is characterized in that adjacent resistance frequently guide plate be arranged in parallel or adjacent resistance frequently the angle between the extended line of guide plate be 1 °-20 °.

6. compound denoising device according to claim 5 is characterized in that the resistance cylindrical shell face of reflection cavity opening forms a left side low right high arcwall face or plane; The chamber of reflection cavity deeply from left to right increases successively.

7. compound denoising device according to claim 6 is characterized in that the reflection cavity opening part is provided with dust guard, and dust guard adopts Air Filter or waffle slab.

8. according to claim 3 or 7 described compound denoising devices, it is characterized in that being interval with space bar along the cylindrical shell length direction in each reflection cavity, the spacing of adjacent spaces plate is 5-25CM.

9. compound denoising device according to claim 8 is characterized in that being provided with between path difference an actor's rendering of an operatic tune and the reflection cavity cavity of complete closed.

10. compound denoising device according to claim 9 is characterized in that drum surface is interval with reinforcing rib; Be respectively equipped with outfall in each chamber bottom on the cylindrical shell.

11. compound denoising device according to claim 10 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.