CN205934757U - Ventilation pressure release railway baffle screen - Google Patents

Ventilation pressure release railway baffle screen Download PDF

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Publication number
CN205934757U
CN205934757U CN201620679012.6U CN201620679012U CN205934757U CN 205934757 U CN205934757 U CN 205934757U CN 201620679012 U CN201620679012 U CN 201620679012U CN 205934757 U CN205934757 U CN 205934757U
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China
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affection
air
pathogenic wind
wind passage
baffle screen
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CN201620679012.6U
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Chinese (zh)
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兰强
朱彬
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Chengdu Chuan Xin Letter Technology Co Ltd
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Chengdu Chuan Xin Letter Technology Co Ltd
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Abstract

The utility model discloses a ventilation pressure release railway baffle screen, including the stand of two relative settings, two be provided with a plurality of acoustical panels on the stand, and form the air exhaust passageway of a stairstepping between two adjacent acoustical panels. Through a plurality of acoustical panels of installation on the stand that sets up two opposition, and form the air exhaust passageway of a stairstepping between two adjacent acoustical panels, be that the air current is in entering into the air exhaust passageway and between removing outside the air exhaust passageway, can form the multiple reflection diversion on two walls of air exhaust passageway, and the pulsation wind pressure that the air current formed baffle screen windward side is most is shifted to the air exhaust passageway in, then in being shifted out the baffle screen along the air exhaust passageway, and then avoid train operation pulsation wind pressure or train operation pulsation wind pressure to shield overload and collapse with natural high wind load superposition's leading to baffle.

Description

A kind of ventilation and pressure release railway baffle screen
Technical field
This utility model is related to noise reduction field and in particular to a kind of ventilation and pressure release type railway baffle screen.
Background technology
In the last few years, constantly developed with the economic of China, the material and culture level of people improves constantly, to living environment Demand also more and more higher, noise is one of four big public hazards of world today's environment, and the sound pollution that railway transportation is brought is asked Topic is also increasingly taken seriously.Noise not only makes one irritated, hinders study, work and rests, affects health, and be difficult to Thoroughly eliminate.The live and work environment comfortable in order to ensure people, needs to use sound-screen in the more serious region of sound pollution Hinder and to reduce noise.Sound barrier is the principle according to sound wave straightline propagation, changes sonic propagation approach with acoustic barrier, reaches The purpose of sensitive area noise reduction.In the decades in past, the design of railway sound barrier focuses primarily upon how to improve its sound absorption fall The performance made an uproar, how to improve its anti-pulsating wind pressure and the ability of natural high wind, and how to improve the aspects such as its fatigue life, this It is designed for newly-built high-speed railway a bit.However as the continuous development of economy and city, a large amount of highways, railway intersect frequency Numerous, gather in cities and towns, village, substantial amounts of residential building and office block have been built in existing railway line both sides, meanwhile, with the speed of train Degree is increasingly faster, running frequency also more and more higher, and produced by train operation, problem of noise pollution increasingly causes the weight of people Depending on the complaint that subjective reflection disturbs to rail noise is more and more frequent, solves this outstanding problem more and more urgent.
Because existing railroad bridge, track circuit do not account for installing sound barrier so that both when original design There is the difficulty of the traditional sound barrier of railway line bridge etc. installation larger, if adopting existing sound barrier(Closed sound barrier) Install and use pattern, due to its closed structure, the train operation impulsive wind pressure bearing in use is with natural high wind load relatively Greatly, in the case of least favorable, train operation impulsive wind pressure can exceed that existing bridge with natural high wind load superposition, its capacity value Beam weight bearing power is it is impossible to meet the bearing condition of railroad bridge license, for traffic safety, periphery personnel and Architectural Equipment etc. all Form larger potential safety hazard.Therefore must again build independent installation foundation, just can ensure that traditional sound barrier existing Use safety on line, but the installation location of installation foundation is inconvenient, difficulty of construction high, and investment is huge to wait all serious shadow of factors Ring use on both wired for traditional sound barrier.
Utility model content
This utility model purpose is to provide a kind of ventilation and pressure release type railway baffle screen, solves both wired basis beam wind lotuses Carry the problem of stress difference, can also solve the problems, such as that traditional sound barrier noise reduction is poor simultaneously.
This utility model is achieved through the following technical solutions:
A kind of ventilation and pressure release type railway baffle screen, including two columns being oppositely arranged, is arranged on two described columns There are multiple acoustical panels, and between two neighboring acoustical panel, form a step-like incessant sweating due to affection by pathogenic wind passage.In prior art, for existing Railroad bridge, the closed sound barrier adopting on track circuit, because train is running along rail high speed, drive around train Air moves therewith, forms train parting, train parting makes the environmental air pressure near train fluctuate, and causes strong air Flowing, this kind disturbance to surrounding air with air pressure and the flowing train that shows of version, close to adjacent lines The impulsive wind pressure that enclosed baffle screen applies and natural high wind load are larger, in the case of least favorable, train operation fluctuating wind Pressure and natural high wind load superposition, its capacity value can exceed that existing bridge load ability it is impossible to meet railroad bridge license Bearing condition, be susceptible to baffle screen and collapse, larger peace is all formed for traffic safety, periphery personnel and Architectural Equipment etc. Full hidden danger;
And inventor passes through to study for a long period of time, by installing multiple acoustical panels on the column of two opposition settings, and Form a step-like incessant sweating due to affection by pathogenic wind passage, that is, air-flow is entering in incessant sweating due to affection by pathogenic wind passage and moving between two adjacent acoustical panels Between to outside incessant sweating due to affection by pathogenic wind passage, multiple reflections break-in can be formed on two walls of incessant sweating due to affection by pathogenic wind passage, and air-flow is to baffle screen windward side shape The impulsive wind pressure major part becoming is transferred in incessant sweating due to affection by pathogenic wind passage, is then transferred out of in baffle screen along incessant sweating due to affection by pathogenic wind passage, and then keeps away That exempts from train operation impulsive wind pressure or train operation impulsive wind pressure and natural high wind load superposition leads to baffle screen overloading Carry and collapse.And, after air-flow enters incessant sweating due to affection by pathogenic wind passage, acoustic wave segment, also can be in acoustical panel while being absorbed by abatvoix Side wall on reflect, and step-like incessant sweating due to affection by pathogenic wind passage makes the sound-absorbing area of abatvoix be greatly improved, and that is, sound wave is in sound-absorbing Order of reflection on plate is corresponding to reflection frequency increase so that reflection sound wave contrary in phase place in incessant sweating due to affection by pathogenic wind passage with incident Sound wave is cancelled out each other, and then improves the noise reduction of acoustical panel.Pass through the incessant sweating due to affection by pathogenic wind passage of setting so that baffle screen is subtracting The noise producing can also be eliminated while its suffered wind load few, and then solve the horizontal of on the basis of both wired baffle screen The problem of wind load stress difference, and can also solve the problems, such as that traditional sound barrier noise reduction is poor.
Air-flow circulates downwards along described incessant sweating due to affection by pathogenic wind passage.Highway is arranged on due to baffle screen, railway intersect frequently or cities and towns, The existing railway line bridge section gathered in village, that is, in the building that adnexa distribution in bridge section is more, and the low layer of building Area distribution has more afforestation vegetation, high-rise region then no any obstacle of building, the gas discharged by incessant sweating due to affection by pathogenic wind passage The environmental degree of comfort in building high level region if stream is discharged upwards, can be directly influenced;Accordingly, as preferred, air-flow edge Described incessant sweating due to affection by pathogenic wind passage circulates downwards, and that is, the stepped of current by pass extends downward outlet air end by air intake, and air-flow is directly outer to be arranged To the low layer region of building, through the obstacles such as afforestation vegetation interception so that impulsive wind pressure produced by air-flow and Noise weakened further it is ensured that by train high speed by when impact to surrounding be down to minimum.
Described incessant sweating due to affection by pathogenic wind channel middle is provided with matching veneer.In incessant sweating due to affection by pathogenic wind passage, the veneer of setting makes air-flow exist Shunt in incessant sweating due to affection by pathogenic wind passage, that is, adjacent with the two respectively acoustical panel after being divided into two-way of air-flow contacts, to realize sound wave in noise reduction Plate is constantly absorbed, and veneer increased air-flow and skims over area in incessant sweating due to affection by pathogenic wind passage, increased the reflection frequency of sound wave simultaneously, And then improve the noise reduction of baffle screen.
It is filled with porous sound absorbing material inside described acoustical panel, and have many on the side wall just to incessant sweating due to affection by pathogenic wind passage for the acoustical panel Individual through hole.Be filled with porous sound absorbing material inside acoustical panel, and multiple through holes are had on acoustical panel so that pressure release passage with Sound absorption cavity body phase in porous sound absorbing material is intercommunicated, and after entering incessant sweating due to affection by pathogenic wind passage, porous sound absorbing material contains numerous bodies to air-flow The long-pending resonating cativty differing, the design of its resonant frequency band is similar to incident-noise frequency band, and it is direct that a part of sound wave passes through through hole Enter resonant sound absorption cavity, another part sound wave is reached on the side wall of adjacent abatvoix by the reflection of abatvoix, and enter and be somebody's turn to do In resonant sound absorption cavity within adjacent abatvoix, sound wave forms multi-cavity resonance during entering resonant sound absorption cavity, simultaneously During air molecule vibration in the micropore of porous sound absorbing material with hole wall friction, acoustic energy is converted into heat energy by the viscid loss of air Consume, thus reach the absorption to noise acting on reduction;Wherein, the contrary reflection sound wave in phase place of remainder with enter Penetrate sound wave to be cancelled out each other, also improve noise reduction to a certain extent.Noise absorbs-reflection-counteracting-suction multiple Receive-reflect again-offset again-resorbent repetitive process substantially eliminates, thus reaching the good fall to different frequency range noise waves Make an uproar effect.
Multiple described through holes are evenly distributed on the side wall of described acoustical panel.Preferably, being uniformly distributed of multiple through holes, Make sound wave produced by air-flow after entering incessant sweating due to affection by pathogenic wind passage, can be more evenly into attracting board inside so that part Enter directly into the sound wave of micropore in sound-absorbing material consistent with the sound wave institute frequency of vibration just entering into after reflection in micropore, Ensure that incident acoustic wave forms multi-cavity resonance with reflection sound wave in two adjacent abatvoixs, it is to avoid incident acoustic wave and reflection sound wave Frequency of vibration is inconsistent and weakens noise reduction.
The aperture of described through hole is 0.3 ~ 1.5.Preferably, the aperture of through hole in 0.3 ~ 1.5 scope so that train When running at high speed, after entering incessant sweating due to affection by pathogenic wind passage, the noise waves of its different frequency range producing all can be by porous for produced air-flow Handled by attractive material, from reaching the good noise reduction to different frequency range noise waves.
This utility model compared with prior art, has such advantages as and beneficial effect:
1st, a kind of ventilation and pressure release type of this utility model railway baffle screen, by the incessant sweating due to affection by pathogenic wind passage of setting so that baffle screen exists Reduce and the noise producing can also be eliminated while its suffered wind load, and then solve the horizontal stroke of baffle screen on the basis of both wired To the problem of wind load stress difference, and can also solve the problems, such as that traditional sound barrier noise reduction is poor;
2nd, a kind of ventilation and pressure release type of this utility model railway baffle screen, in incessant sweating due to affection by pathogenic wind passage, the veneer of setting makes air-flow let out Shunt in wind passage, that is, adjacent with the two respectively acoustical panel after being divided into two-way of air-flow contacts, to realize sound wave in acoustical panel Constantly absorbed, veneer increased air-flow and skims over area in incessant sweating due to affection by pathogenic wind passage, increased the reflection frequency of sound wave simultaneously, enters And improve the noise reduction of baffle screen;
3rd, a kind of ventilation and pressure release type of this utility model railway baffle screen, noise absorbs-reflection-counteracting-absorption-again multiple Reflect-offset again-resorbent repetitive process substantially eliminates, thus reaching the good noise reduction effect to different frequency range noise waves Really.
Brief description
Accompanying drawing described herein is used for providing this utility model embodiment is further understood, and constitutes the one of the application Part, does not constitute the restriction to this utility model embodiment.In the accompanying drawings:
Fig. 1 is this utility model structural representation;
Fig. 2 is the sectional view of acoustical panel.
Labelling and corresponding parts title in accompanying drawing:
1- column, 2- acoustical panel, 3- porous sound absorbing material, 4- incessant sweating due to affection by pathogenic wind passage, 5- veneer.
Specific embodiment
For making the purpose of this utility model, technical scheme and advantage become more apparent, with reference to embodiment and accompanying drawing, The utility model is described in further detail, and exemplary embodiment of the present utility model and its explanation are only used for explaining this Utility model, is not intended as to restriction of the present utility model.
Embodiment 1
As depicted in figs. 1 and 2, the present embodiment includes two columns being oppositely arranged 1, arranges on two described columns 1 There are multiple acoustical panels 2, and between two neighboring acoustical panel 2, form a step-like incessant sweating due to affection by pathogenic wind passage 4.By at two to erecting Multiple acoustical panels 2 are installed on the column 1 put, and forms a step-like incessant sweating due to affection by pathogenic wind between two adjacent acoustical panels 2 and lead to Road 4, that is, air-flow enter in incessant sweating due to affection by pathogenic wind passage 4 and mobile to incessant sweating due to affection by pathogenic wind passage 4 outer between, can be on two walls of incessant sweating due to affection by pathogenic wind passage 4 Form multiple reflections break-in, and the impulsive wind pressure major part that air-flow is formed to baffle screen windward side is transferred to incessant sweating due to affection by pathogenic wind passage 4 Interior, then it is transferred out of in baffle screen along incessant sweating due to affection by pathogenic wind passage 4, and then avoid train operation impulsive wind pressure or train operation pulsation Wind pressure is collapsed with the baffle screen excess load that leads to of natural high wind load superposition.And, after air-flow enters incessant sweating due to affection by pathogenic wind passage 4, Acoustic wave segment, while being absorbed by abatvoix, also can reflect on the side wall of acoustical panel 2, and step-like incessant sweating due to affection by pathogenic wind passage 4 make the sound-absorbing area of abatvoix be greatly improved, and that is, order of reflection on abatvoix for the sound wave is corresponding to reflection frequency increases, and makes Obtain contrary in phase place reflection sound wave in incessant sweating due to affection by pathogenic wind passage 4 to be cancelled out each other with incident acoustic wave, and then improve acoustical panel 2 Noise reduction.Pass through the incessant sweating due to affection by pathogenic wind passage 4 of setting so that baffle screen can also will produce while reducing its suffered wind load Noise eliminate, and then solve the problems, such as baffle screen on the basis of both wired across-wind dynamic load stress poor, and can also solve The problem of traditional sound barrier noise reduction difference.
Embodiment 2
As shown in Fig. 2 the present embodiment is on the basis of embodiment 1, acoustical panel 2 adopts non-horizontal to arrange, that is, adjacent The stair-stepping incessant sweating due to affection by pathogenic wind passage 4 that constituted between two acoustical panels 2 is so that sound wave skims over face in step-like current by pass Amass and increase further, that is, incessant sweating due to affection by pathogenic wind passage 4 improves further to the pressure release of air-flow and noise reduction.Wherein, because baffle screen sets Zhi highway, railway intersect frequently or the existing railway line bridge section gathered of cities and towns, village, and that is, in bridge section, adnexa divides The more building of cloth, and the low layer region of building is distributed with more afforestation vegetation, the high-rise region of building is then no appointed What obstacle, if discharge upwards, can directly influence the ring in building high level region by the air-flow that incessant sweating due to affection by pathogenic wind passage 4 is discharged Border comfort level;Accordingly, as preferred, air-flow circulates downwards along described incessant sweating due to affection by pathogenic wind passage 4, i.e. current by pass 4 stepped by air intake End extends downward outlet air end, the air-flow directly outer low layer region draining into building, through the interception of the obstacles such as afforestation vegetation, Make impulsive wind pressure produced by air-flow and noise weakened further it is ensured that to surrounding when train high speed is passed through Impact be down to minimum.
Embodiment 3
As shown in Fig. 2 the present embodiment is on the basis of embodiment 1, it is filled with porous sound absorbing material inside acoustical panel 2 3, and have multiple through holes on the side wall just to incessant sweating due to affection by pathogenic wind passage 4 for the acoustical panel 2.It is filled with porous sound absorbing material inside acoustical panel 2 Material 3, and have multiple through holes on acoustical panel 2 so that pressure release passage is interconnected with the sound absorption cavity body phase in porous sound absorbing material 3 Logical, air-flow after entering incessant sweating due to affection by pathogenic wind passage 4, the resonating cativty that porous sound absorbing material 3 differs containing numerous volumes, its resonant frequency band Design is similar to incident-noise frequency band, and a part of sound wave is directly entered resonant sound absorption cavity, another part sound wave by through hole Reached on the side wall of adjacent abatvoix by the reflection of abatvoix, and enter the resonant sound absorption cavity within this adjacent abatvoix In, sound wave forms multi-cavity resonance during entering resonant sound absorption cavity, in porous sound absorbing material 3 during air molecule vibration simultaneously Micropore in hole wall friction, acoustic energy is converted into thermal energy consumption and falls by the viscid loss of air, thus reaching the absorption to noise With reduction effect;Wherein, the contrary reflection sound wave in phase place of remainder is cancelled out each other with incident acoustic wave, also certain Noise reduction is improve on degree.Noise multiple absorb-reflection-offset-absorb-reflect-offset again-resorbent repetition again Process substantially eliminates, thus reaching the good noise reduction to different frequency range noise waves.
Preferably, being provided with matching veneer 5 in the middle part of described incessant sweating due to affection by pathogenic wind passage 4.The list of setting in incessant sweating due to affection by pathogenic wind passage 4 Plate 5 makes air-flow shunt in incessant sweating due to affection by pathogenic wind passage 4, and that is, adjacent with the two respectively acoustical panel 2 after being divided into two-way of air-flow contacts, with Realize sound wave constantly to be absorbed in acoustical panel 2, veneer 5 increased air-flow and skims over area in incessant sweating due to affection by pathogenic wind passage 4, increases simultaneously The reflection frequency of sound wave, and then improve the noise reduction of baffle screen.
Preferably, multiple through holes be uniformly distributed so that sound wave produced by air-flow enter incessant sweating due to affection by pathogenic wind passage 4 after, energy Reflect with passing through so that partly entering directly into the sound wave of micropore in sound-absorbing material enough more evenly into attracting board inside Just enter into afterwards sound wave institute frequency of vibration in micropore consistent it is ensured that incident acoustic wave with reflection sound wave in two adjacent abatvoixs Middle formation multi-cavity resonance, it is to avoid incident acoustic wave and reflection sound wave frequency of vibration are inconsistent and weaken noise reduction.
Preferably, the aperture of through hole in 0.3 ~ 1.5 scope so that train produced air-flow when running at high speed exists After entering incessant sweating due to affection by pathogenic wind passage 4, the noise waves of its different frequency range producing all can be handled by porous attractive material, from reaching to not Good noise reduction with band noise ripple.
Above-described specific embodiment, is entered to the purpose of this utility model, technical scheme and beneficial effect One step describes in detail, be should be understood that and the foregoing is only specific embodiment of the present utility model, is not used to limit Fixed protection domain of the present utility model, all any modifications within spirit of the present utility model and principle, made, equivalent replaces Change, improve, should be included within protection domain of the present utility model.

Claims (4)

1. a kind of ventilation and pressure release railway baffle screen, including two columns being oppositely arranged (1) it is characterised in that:Described in two Multiple acoustical panels (2) are provided with column (1), and between two neighboring acoustical panel (2), form a step-like incessant sweating due to affection by pathogenic wind passage (4), air-flow circulates downwards along described incessant sweating due to affection by pathogenic wind passage (4), is provided with matching veneer in the middle part of described incessant sweating due to affection by pathogenic wind passage (4) (5).
2. a kind of ventilation and pressure release railway baffle screen according to claim 1 it is characterised in that:Described acoustical panel (2) is internal It is filled with porous sound absorbing material (3), and have multiple through holes on the side wall just to incessant sweating due to affection by pathogenic wind passage (4) for the acoustical panel (2).
3. a kind of ventilation and pressure release railway baffle screen according to claim 2 it is characterised in that:Multiple described through holes uniformly divide Cloth is on the side wall of described acoustical panel (2).
4. a kind of ventilation and pressure release railway baffle screen according to claim 3 it is characterised in that:The aperture of described through hole is 0.3~1.5.
CN201620679012.6U 2016-07-01 2016-07-01 Ventilation pressure release railway baffle screen Active CN205934757U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620679012.6U CN205934757U (en) 2016-07-01 2016-07-01 Ventilation pressure release railway baffle screen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620679012.6U CN205934757U (en) 2016-07-01 2016-07-01 Ventilation pressure release railway baffle screen

Publications (1)

Publication Number Publication Date
CN205934757U true CN205934757U (en) 2017-02-08

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Application Number Title Priority Date Filing Date
CN201620679012.6U Active CN205934757U (en) 2016-07-01 2016-07-01 Ventilation pressure release railway baffle screen

Country Status (1)

Country Link
CN (1) CN205934757U (en)

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