CN104631354A - 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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- CN104631354A CN104631354A CN201510081608.6A CN201510081608A CN104631354A CN 104631354 A CN104631354 A CN 104631354A CN 201510081608 A CN201510081608 A CN 201510081608A CN 104631354 A CN104631354 A CN 104631354A
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- sound absorbing
- sound absorber
- light rail
- absorbing device
- shaped beam
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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 a kind of for light rail U-shaped beam composite construction sound absorber.Can effectively reduce the radiation of track noise, the backplate that simultaneously can be used as the U-shaped beam cable testing bridge of light rail uses, and plays good effect to the overall noise reduction of track traffic.
Background technology
Along with the quick propelling of the fast development of China's economy and industrialization, urbanization process.In recent years, railway, highway, subway and urban light rail are increasing, while being convenient for people to trip, but become the fourth-largest pollution after atmosphere pollution, water pollutions and noxious waste pollution, thus the governing problem of noise pollution has become the eager social concern solved.At present for the noise produced in the means of transportation most important thing especially.The sound absorption efficiency of existing sound absorbing-insulating barrier is not high, sound absorbing capabilities is unstable, intensity is low and weatherability is poor, make unit price higher and be not easy to install.Moreover the vibration produced when Urban Light Rail Vehicles runs and noise produce adverse influence to surrounding environment, disturb work and the life of subjective reflection, constrain the development of light rail transit to a certain extent.
At present; for the noise common method propagated in atmosphere be adopt noise barrier; sound barrier is the acoustics baffle be arranged between train and protected building; its effect stops the through protected building around of train noise; reduce train noise to the impact of 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, distance composition cavity body is left between first laminate, the second laminate, uniform sound-absorbing hole on the plate face of the first laminate, the second laminate, third layer plate, filling sucting sound material between the second laminate, third layer plate.Although its noise reduction is better, there is no any difference with existing noise reduction barrier, still there is the defect that sound barrier is above-mentioned.Comparatively large by the impact of train parting during use, and its eccentric throw of installing is comparatively large, installs insecure, causes unsafe factor.
Summary of the invention
The technical problem to be solved in the present invention is the deficiency how overcoming prior art existence, provides a kind of for light rail U-shaped beam composite construction sound absorber.
Technical solution of the present invention is: a kind of for light rail U-shaped beam composite construction sound absorber, comprise sound absorber body, described sound absorber body ecto-entad is followed successively by microperforated panel, tinfoil paper, sound absorption cotton, cavity and base plate, described microperforated panel surface is provided with the micropore kept at a certain distance away, tinfoil paper is close in the cotton top of described sound absorption, described base plate is provided with the projection of interval certain interval, and described height of projection is consistent with described cavity height.
Further, described sound absorber body side is provided with protected apron, and described sound absorber body cross-section is cuboid.
Further, described base plate left and right two ends is provided with support, and shown support is provided with step, and it is cotton that described step supports sound absorption, and described support is consistent with described protected apron height, and described support is close to inside protected apron.
Further, described projection is trapezoidal.
Further, described microperforated panel height is 0.5 ~ 1mm, and described micropore size < 1mm, perforated percentage is 1% ~ 5%.
Further, described base plate is PVC alloy material.
Further, described tinfoil paper thickness is 0.02-0.4mm.
The present invention utilizes the U-shaped beam of light rail, by sound absorber of applying ointment or plaster, improves the noise elimination noise reduction effect of U-shaped beam itself, can not only reduce the noise of surrounding environment, and effectively can reduce the noise in compartment.Microperforated panel of the present invention adopts perforated aluminum alloy panel (through anti-oxidation process) or inorganic perforated plate, and base plate adopts PVC alloy material, shaping by plastic uptake processes.Inner filling sound absorption cotton (noise reduction coefficient NRC >=0.88), Specialty Design is carried out from acoustical board flow resistance, porosity, structure factor, thickness, density, surfacing process and installation aspect, give full play to the advantage of each individual event material, simple, convenient, attractive in appearance, practical.
The present invention, except having good sound absorbing capabilities, also has fire prevention, fire resistance reaches A level, may be used for the place of various bad environments.Moreover also having water-fast, anticorrosion, 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 large, physics, chemical stability are good, long service life, and cost is low, is convenient to processing and produces.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is structural representation of the present invention;
Fig. 2 is mounting structure schematic diagram of the present invention;
Detailed description of the invention
Referring to accompanying drawing, describe the present invention's one in detail and be used for light rail U-shaped beam composite construction sound absorber.
As shown in Figure 1, for one is used for light rail U-shaped beam composite construction sound absorber, comprise sound absorber body, described sound absorber body ecto-entad is followed successively by microperforated panel 1, tinfoil paper 2, sound absorption cotton 3, cavity 4 and base plate 5, described microperforated panel 1 surface is provided with the micropore 11 kept at a certain distance away, described microperforated panel 1 is highly 1mm, and described micropore 11 aperture < 1mm, perforated percentage is 1% ~ 5%.Be close to tinfoil paper 2 above described sound absorption cotton 3, described tinfoil paper thickness is 0.1mm, can play dust-proof, the effect of rainwater-proof.In addition, sound absorption cotton 3 is applied ointment or plaster after tinfoil paper 2, tests its sound absorbing capabilities be improved in low-frequency range through impedance tube.Moreover sound absorption cotton 3 has compression set 2% (GB/T10295-1988); Miter angle burns, difficult combustion level (TB/T2402-1993); Noise reduction coefficient reaches NRC >=0.9 (GB 47-83); Hydrophobic rate 96% (GB/T10299-1988); Vapor permeation index is 2.46*10-6g/ ㎡ .s.Pa (GB/T17146-1997); The corrosion of various microorganism, fungi, acid, salt and hydrocarbon can be resisted; Also have anti-aging, wear-resisting, water-fastness, be never out of shape, environmental protection recoverable.
Described base plate 5 is PVC alloy material, meets this composite sound absorbing device to material lightweight, intensity (hardness), anticorrosion, aging-resistant requirement.Described base plate 5 is provided with the projection 51 of interval certain interval, described protruding 51 is trapezoidal, described protruding 51 height are consistent with the height of described cavity 4, and protruding 51 for supporting sound absorption cotton 3, and the cavity 4 arranged improves the more economically sound absorption properties of low frequency than the thickness or density increasing material.For convenience of installing, described sound absorber body side is provided with protected apron 6, and described sound absorber body cross-section is cuboid.Described base plate 5 left and right sides is provided with support 52; shown support 52 is provided with step 53; described step 53 supports the left and right sides of sound absorption cotton 3; ensure that sound absorption cotton 3 is fixing solid; described support 52 is highly consistent with described protected apron 6; described support 52 is close to inside protected apron 6, for the protection of whole sound absorber.
As shown in Figure 2, for installation drawing of the present invention, the both sides of the U-shaped beam of light rail are equipped with the some crane span structures for cable wiring be arranged above and below, the present invention is directly installed on the outside of crane span structure, and setting height(from bottom) is 800mm, utilizes the U-shaped beam of light rail, by arranging sound absorber, improve the noise elimination noise reduction effect of U-shaped beam itself, the noise of surrounding environment can not only be reduced, and effectively can reduce the noise in compartment.The design of this sound absorber, under the condition possessing excellent sound absorbing capabilities, has possessed the decoration to cable and crane span structure and safeguard function simultaneously.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to embodiment illustrated herein, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. one kind for light rail U-shaped beam composite construction sound absorber, comprise sound absorber body, it is characterized in that: sound absorber body ecto-entad is followed successively by microperforated panel, tinfoil paper, sound absorption cotton, cavity and base plate, described microperforated panel surface is provided with the micropore kept at a certain distance away, tinfoil paper is close in the cotton top of described sound absorption, described base plate is provided with the projection of interval certain interval, and described height of projection is consistent with described cavity height.
2. one according to claim 1 is used for light rail U-shaped beam composite construction sound absorber, it is characterized in that: described sound absorber body side is provided with protected apron, and described sound absorber body cross-section is cuboid.
3. be used for light rail U-shaped beam composite construction sound absorber according to the one described in claim 1 to 2, it is characterized in that: described base plate left and right two ends is provided with support, shown support is provided with step, it is cotton that described step supports sound absorption, described support is consistent with described protected apron height, and described support is close to inside protected apron.
4. one according to claim 1 is used for light rail U-shaped beam composite construction sound absorber, it is characterized in that: described projection is trapezoidal.
5. one according to claim 1 is used for light rail U-shaped beam composite construction sound absorber, and it is characterized in that: described microperforated panel height is 0.5 ~ 1mm, described micropore size < 1mm, perforated percentage is 1% ~ 5%.
6. one according to claim 1 is used for light rail U-shaped beam composite construction sound absorber, it is characterized in that: described tinfoil paper thickness is 0.02-0.4mm.
7. one according to claim 1 is used for light rail U-shaped beam composite construction sound absorber, it is characterized in that: described base plate is PVC alloy material.
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| 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 |
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| 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 |
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| Publication Number | Publication Date |
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| CN104631354A true CN104631354A (en) | 2015-05-20 |
| CN104631354B CN104631354B (en) | 2017-05-17 |
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Cited By (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 (6)
| 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 |
| 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 |
| 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 |
| 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 |
| 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 (6)
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
Cited By (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 |
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| Publication number | Publication date |
|---|---|
| CN104631354B (en) | 2017-05-17 |
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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. |