CN104631354B - Sound absorbing device used for U-beam composite structure of light rail - Google Patents
Sound absorbing device used for U-beam composite structure of light rail Download PDFInfo
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- CN104631354B CN104631354B CN201510081608.6A CN201510081608A CN104631354B CN 104631354 B CN104631354 B CN 104631354B CN 201510081608 A CN201510081608 A CN 201510081608A CN 104631354 B CN104631354 B CN 104631354B
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Abstract
The invention relates to the field of light-rail sound absorption, in particular to a sound absorbing device used for the U-beam composite structure of the light rail. The sound absorbing device comprises a sound absorbing device body, the sound absorbing device body is composed of a microporous plate, tin foil, sound absorbing cotton, a cavity and a bottom plate from outside to inside, the surface of the microporous plate is provided with micropores spaced, the tin foil is closely attached above the sound absorbing cotton, spaced projections are arranged on the bottom plate, and the height of the projections is identical with the height of the cavity. The sound absorbing device is of composite structure, the microporous plate is an aluminum alloy pore plate or an inorganic pore plate, the bottom plate is molded by PVC (polyvinyl chloride) alloy materials by a vacuum casting process. The sound absorbing device is filled with the sound absorbing cotton (with noise reduction coefficient larger than or equal to 0.88), and is specially designed from the aspects of flow resistance of an acoustic panel absorber, porosity, structure factor, thickness, density, surface material treatment and mounting, advantages of various single materials can be sufficiently given into play, high, medium and low frequency broad-spectrum noise is reduced, and the sound absorbing device has the advantages of simplicity, convenience, attractive appearance and practicality.
Description
Technical field
The present invention relates to light rail noise elimination field, is that one kind is used for the U-shaped beam composite construction sound absorber of light rail.Can effectively drop
The radiation of low orbit noise, uses at the same time as the backplate of the U-shaped beam cable testing bridge of light rail, and the overall noise reduction of track traffic is risen
To effect well.
Background technology
As the fast development and industrialization of China's economy, urbanization process are quickly propelled.In recent years, railway, public affairs
Road, subway and urban light rail are increasing, while trip is convenient for people to, but becomes after atmosphere pollution, water pollution and consolidate
The fourth-largest pollution after body waste pollution, thus the society that the governing problem of noise pollution has become eager solution is asked
Topic.The most important thing is even more currently for noise produced in means of transportation.The sound absorption efficiency of existing sound absorbing-insulating barrier is not
Height, unstable sound absorbing capabilities, low intensity and weatherability it is poor, make unit price it is higher and be not easy to install.Furthermore, Urban Light Rail Vehicle
The vibration that produces and noise have adverse effect on to surrounding environment during operation, disturb the work and life of subjective reflection,
The development of light rail transit is constrained to a certain extent.
At present, the noise common method for propagating in atmosphere is to adopt acoustic barrier, and sound barrier is disposed on train
And the acoustics baffle between protected building, its effect is to stop the protected building of the through surrounding of train noise, reduces train
Impact of the noise to surrounding environment, but the noise reduction in compartment is not acted on.
Notification number is CN201339164Y, it discloses a kind of road noise absorbing screen, its first laminate, the second laminate,
Third layer plate two side ends are fixed on column, leave between the first laminate, the second laminate distance composition cavity body, the first laminate,
Uniform sound-absorbing hole, filling sucting sound material between the second laminate, third layer plate in second laminate, the plate face of third layer plate.Its noise reduction
Although effect is preferably, with existing noise reduction barrier without what difference, however it remains the above-mentioned defect of sound barrier.When using
Affected larger by train parting, and its eccentric throw installed is larger, installs insecure, causes unsafe factor.
The content of the invention
The technical problem to be solved in the present invention is how to overcome the shortcomings of that prior art is present, there is provided one kind is used for light rail U
Type beam composite construction sound absorber.
The present invention technical solution be：One kind is used for the U-shaped beam composite construction sound absorber of light rail, including sound absorber
Body, sound absorber body ecto-entad is followed successively by microperforated panel, tinfoil paper, sound absorption cotton, cavity and base plate, microperforated panel surface
The micropore for keeping at a certain distance away is provided with, base plate is provided with the projection of interval certain interval, and height of projection is consistent with the cavity height；
It is close to tinfoil paper in sound absorption cotton top；
Sound absorber body is arranged above and below and for cable wiring installed in some set by the both sides of the U-shaped beam of light rail
The outside of crane span structure.
Further, the setting height(from bottom) of sound absorber body is 800mm.
Further, this body side surface of sound absorber is provided with protective plate, and the sound absorber body cross-section is cuboid.
Further, base plate or so two ends are provided with support, and shown support is provided with step, and the step supports sound absorption cotton,
Support highly consistent with the protective plate, protective plate inner side is close in the support.
Further, raised is trapezoidal.
Further, microperforated panel is highly 0.5~1mm, and the micropore size ＜ 1mm, punching rate is 1%~5%.
Further, base plate is PVC alloy material.
Further, tinfoil paper thickness is 0.02~0.4mm.
The present invention utilizes the U-shaped beam of light rail, by applying sound absorber, improves the noise elimination noise reduction effect of U-shaped beam itself, not only
The noise of surrounding environment can be reduced, and can effectively reduce the noise in compartment.Microperforated panel of the present invention adopts aluminium alloy
Perforated plate (the anti-oxidation process of Jing) or inorganic perforated plate, base plate adopts PVC alloy material, by plastic uptake technique machine-shaping.It is internal
Filling sound absorption cotton (noise reduction coefficient NRC >=0.88), from acoustic board flow resistance, porosity, structure factor, thickness, density, surfacing
Process and installation carries out Specialty Design, give full play to the advantage of each individual event material, simple, convenient, attractive in appearance, practicality.
The present invention also reaches A levels in addition to good sound absorbing capabilities with fire prevention, fire resistance, can be used for each
Plant the place of bad environments.Furthermore also there is water-fast, anti-corrosion, water logging of making moist is indeformable, does not soften, and acoustical behavior is unaffected.
Finally, the present invention is durable, anti-aging, acidproof, alkaline-resisting, hardness is big, physics, chemical stability are good, long service life, low cost,
It is easy to process and produces.
Description of the drawings
With reference to the accompanying drawings and examples the invention will be further described.
Fig. 1 is schematic structural view of the invention；
Fig. 2 is mounting structure schematic diagram of the present invention；
Specific embodiment
Referring to the drawings, the present invention is described in detail a kind of for the U-shaped beam composite construction sound absorber of light rail.
As shown in figure 1, being used for the U-shaped beam composite construction sound absorber of light rail, including sound absorber body, the suction for a kind of
Acoustic device body ecto-entad is followed successively by microperforated panel 1, tinfoil paper 2, sound absorption cotton 3, cavity 4 and base plate 5, the microperforated panel 1
Surface is provided with the micropore 11 for keeping at a certain distance away, and the height of the microperforated panel 1 is 1mm, the aperture ＜ 1mm of the micropore 11, is bored a hole
Rate is 1%~5%.Tinfoil paper 2 is close in the top of sound absorption cotton 3, and the tinfoil paper thickness is 0.1mm, can play dust-proof, rainwater-proof
Effect.In addition, after the sound absorption application tinfoil paper 2 of cotton 3, Jing impedance tubes are tested its sound absorbing capabilities and are improved in low-frequency range.Furthermore,
Sound absorption cotton 3 has compression set 2% (GB/T10295-1988)；45 degree of angle burnings, fire retardant level (TB/T2402-
1993)；Noise reduction coefficient reaches NRC >=0.9 (GB 47-83)；Hydrophobic rate 96% (GB/T10299-1988)；Vapor permeation refers to
Number is 2.46*10-6g/ ㎡ .s.Pa (GB/T17146-1997)；Various microorganisms, fungi, acid, salt and nytron can be resisted
The corrosion of thing；Also have it is anti-aging, wear-resisting, water-fastness, never deform, environmentally friendly recoverable.
The base plate 5 is PVC alloy material, meets this composite sound absorbing device to material lightweight, intensity (hardness), anti-
Rotten, aging-resistant is required.The base plate 5 is provided with the projection 51 of interval certain interval, and described raised 51 for trapezoidal, and described raised 51
Height is highly consistent with the cavity 4, and raised 51 are used to support sound absorption cotton 3, and the cavity 4 for arranging than increasing material
Thickness or density are improving the sound absorption properties more economical of low frequency.For convenience of installing, described this body side surface of sound absorber is provided with anti-
Backplate 6, the sound absorber body cross-section is cuboid.The left and right sides of the base plate 5 is provided with support 52, shown to support 52 to set
Have a step 53, the step 53 supports the left and right sides of sound absorption cotton 3, it is ensured that sound absorption cotton 3 fixes solid, it is described support 52 with it is described
Protective plate 6 is highly consistent, described to support 52 to be close to the inner side of protective plate 6, for protecting whole sound absorber.
As shown in Fig. 2 be installation diagram of the present invention, the both sides of the U-shaped beam of light rail be equipped with some be arranged above and below for line
The crane span structure of cable cabling, the present invention is directly installed on the outside of crane span structure, and setting height(from bottom) is 800mm, using the U-shaped beam of light rail, by setting
Sound absorber is put, the noise elimination noise reduction effect of U-shaped beam itself is improved, the noise of surrounding environment can not only be reduced, and can be had
Effect reduces the noise in compartment.The design of this sound absorber is under conditions of possessing excellent sound absorbing capabilities, and it is right to be provided simultaneously with
The decoration and safeguard function of cable and crane span structure.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention
Embodiment illustrated herein is not intended to be limited to, and is to fit to consistent with principles disclosed herein and features of novelty
Most wide scope.
Claims (1)
1. a kind of to be used for the U-shaped beam composite construction sound absorber of light rail, including sound absorber body, the sound absorber body is by outer
Microperforated panel, tinfoil paper, sound absorption cotton, cavity and base plate are inwardly followed successively by, the microperforated panel surface is provided with and keeps at a certain distance away
Micropore, the microperforated panel highly be 1mm, the micropore size ＜ 1mm, punching rate be 1%~5%, it is described sound absorption cotton on
Tinfoil paper is close to by side, and the tinfoil paper thickness is 0.02mm-0.4mm, sound absorption cotton noise reduction coefficient NRC >=0.88, and the base plate is
PVC alloy material, the base plate is provided with the projection of interval certain interval, described raised for trapezoidal, the height of projection with it is described
Cavity it is highly consistent, projection for supporting sound absorption cotton, described this body side surface of sound absorber to be provided with protective plate, the sound absorption dress
It is cuboid to put body cross-section, and the base plate left and right sides is provided with support, and the support is provided with step, and the step is supported to be inhaled
The left and right sides of sound cotton, it is ensured that sound absorption cotton fixes solid, described to support highly consistent with the protective plate, the support is close to
Protective plate inner side, for protecting whole sound absorber, the both sides of the U-shaped beam of light rail be equipped with some be arranged above and below for cable
The crane span structure of cabling, sound absorber is directly installed on the outside of crane span structure, and setting height(from bottom) is 800mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510081608.6A CN104631354B (en) | 2015-02-15 | 2015-02-15 | Sound absorbing device used for U-beam composite structure of light rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510081608.6A CN104631354B (en) | 2015-02-15 | 2015-02-15 | Sound absorbing device used for U-beam composite structure of light rail |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104631354A CN104631354A (en) | 2015-05-20 |
| CN104631354B true CN104631354B (en) | 2017-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510081608.6A Active CN104631354B (en) | 2015-02-15 | 2015-02-15 | Sound absorbing device used for U-beam composite structure of light rail |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106638342A (en) * | 2016-12-01 | 2017-05-10 | 辽宁融达新材料科技有限公司 | Foamed aluminum substrate sound barrier of U-shaped beam of metro |
| CN110983943A (en) * | 2019-12-31 | 2020-04-10 | 中国铁路设计集团有限公司 | Damping type low-noise trough beam for high-speed railway |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1397688A (en) * | 2001-07-13 | 2003-02-19 | 四川省交通厅公路规划勘察设计研究院 | Sound-absorbing barrier for highway |
| CN201933425U (en) * | 2010-10-20 | 2011-08-17 | 北京士兴钢结构有限公司 | Composite noise insulating and absorbing barrier plate |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3637463A1 (en) * | 1986-11-04 | 1988-05-11 | Kirchner Fraenk Rohr | SUBSTRATE ARRANGEMENT FOR ROOF BLANKING AND METHOD AND DEVICE FOR PRODUCING THE SAME |
| CN2780868Y (en) * | 2005-01-25 | 2006-05-17 | 徐祝军 | Composite board with sound-absorbing noise-reducing and sound insulation |
| CN101654995A (en) * | 2008-08-22 | 2010-02-24 | 马兴华 | Porous glass plate and structures adopting porous glass plate |
| CN204510039U (en) * | 2015-02-15 | 2015-07-29 | 青岛声达技术有限公司 | A kind of for light rail U-shaped beam composite construction sound absorber |
-
2015
- 2015-02-15 CN CN201510081608.6A patent/CN104631354B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1397688A (en) * | 2001-07-13 | 2003-02-19 | 四川省交通厅公路规划勘察设计研究院 | Sound-absorbing barrier for highway |
| CN201933425U (en) * | 2010-10-20 | 2011-08-17 | 北京士兴钢结构有限公司 | Composite noise insulating and absorbing barrier plate |
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| CN104631354A (en) | 2015-05-20 |
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Effective date of registration: 20230906 Address after: 266000 No.1 Weiyi Road, Keyuan, Qingdao, Shandong Province Patentee after: Qingdao Qingyuan Vibration Reduction Technology Co.,Ltd. Address before: 266023 Shandong province Qingdao Shibei supernatant Road No. 8 Patentee before: QINGDAO SENDATA TECHNOLOGY Co.,Ltd. |