CN201933425U - Composite noise insulating and absorbing barrier plate - Google Patents
Composite noise insulating and absorbing barrier plate Download PDFInfo
- Publication number
- CN201933425U CN201933425U CN201020577234XU CN201020577234U CN201933425U CN 201933425 U CN201933425 U CN 201933425U CN 201020577234X U CN201020577234X U CN 201020577234XU CN 201020577234 U CN201020577234 U CN 201020577234U CN 201933425 U CN201933425 U CN 201933425U
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- front panel
- compound
- core
- backplate
- gobo baffle
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Abstract
The utility model discloses a composite noise insulating and absorbing barrier plate, which comprises a front panel, a back panel and a core material fixed between the two panels in a sticking way, wherein the core material is arranged in a strip shape, and the fiber direction of the core material is vertical to the front panel and the back panel; multi-tongue rabbets are arranged at the two sides of the composite noise insulating and absorbing barrier plate at joints of the front panel and the back panel, and the multi-tongue rabbets at the two sides of the composite noise insulating and absorbing barrier plate can be mutually inserted; the front panel is a perforated panel, and micropores with the perforation rate of 3%-30% are arranged on the front panel; the porosity of the core material is 97%- 98.4%, and the average diameter of the fiber is 5-6 microns; and the length of the fiber is 150mm-200 mm, and noise enters the core material through the micropores and is absorbed along the fiber direction of the core material. In the composite noise insulating and absorbing barrier plate, the noise in the environment can be well absorbed, and simultaneously the noise is insulated, so that the impact of noise on the surround environment can be avoided.
Description
Technical field
The utility model relates to noise abatement and field of environment protection, more particularly, relates to a kind of compound every the gobo baffle.
Background technology
Along with a large amount of constructions of the high speed development of communications and transportation, industrial production, urban construction, particularly high-speed railway, pollution from environmental noise is serious day by day, has become big public hazards of polluting the human society environment.In order to alleviate the problem of noise pollution, become one of first-selected product of noise abatement every absorbent lined barrier.The high-speed railway speed per hour has reached 250km/h, and the part circuit reaches more than the 350km/h.At first bullet train by the time neighboring buildings produced very strong blast, therefore the structural strength to sound barrier panel proposes very high requirement; Produce very high noise during high-speed railway operation simultaneously, especially the medium and low frequency noise is obvious, and traditional sound barrier panel and sound absorption material thereof are not set the frequency of noise is special usually, can't satisfy the demand of administering low-frequency noise.In sum, traditional sound barrier panel can't satisfy the especially demand of high-speed railway noise abatement of ambient noise, and it is extremely urgent that advanced, effective, novel sound barrier panel of new generation is invented in research.
Traditional sound barrier panel structure is generally frame construction both at home and abroad, and its panel, backboard by-level are placed sound absorption material, and sound absorption material covers with waterproof ventilated membrane, and panel and backboard adopt riveted way to fix.Tradition sound barrier sound absorption material becomes tabular horizontal positioned, and sound wave is perpendicular to fiber incident, and plane of incidence fiber number is more, and volume reflection is bigger, can influence to some extent sound absorbing capabilities.Existing gobo baffle only adopts waterproof ventilated membrane to carry out structurally waterproof, after the waterproof ventilated membrane waterproof effect reduces, the gobo baffle meeting moisture absorption, adsorbed by sound absorption material behind the condensation vapor, steam is full of in the hole of the core in the gobo baffle, influence the friction and the vibration of interior air of core and core, reduce the absorptivity of sound wave.
Publication number is that the Chinese patent of CN200962313Y discloses a kind of material that absorbs sound, and comprises offset plate, is provided with one deck in a side of offset plate and vertically becomes net or tiltedly become the net non-woven mat; Perhaps comprise two-layer nonwoven, between two-layer nonwoven, be provided with the vertical one-tenth net non-woven mat of one deck or tiltedly become the net non-woven mat; Perhaps comprise one deck offset plate and one deck plastic sheet film, between offset plate and plastic sheet film, be provided with the vertical one-tenth net non-woven mat of one deck or tiltedly become the net non-woven mat.But the oblique one-tenth net non-woven mat that vertical one-tenth net that the described sound absorption material of this patent is arranged well-regulated vertical direction or well-regulated incline direction are arranged replaces randomly being arranged as main non-woven mat with horizontal direction, this kind material is mainly used in automotive interior material, can absorb the noise on the roadway.
But the described sound absorption material of this patent is owing to be mainly used in the car in order to absorb the noise on the roadway.If described sound absorption material is applied to by the outdoor especially high-speed railway track, then, there is not any effect for the low-frequency noise that high-speed railway produces only by vertical or arranged askew with non-woven mat.In addition, be installed in outdoor being used to handle the high-speed railway noise every absorbent lined barrier, often run into wet environments such as wet weather, dense fog, steam condenses in sound absorption material, influenced by the Van der Waals force between the water droplet, the air flow resistance increases, and the actual porosity of sound absorption material reduces, influence the friction and the vibration of air and sound absorption material, reduced acoustically effective; Also can increase every the gobo baffle because suction deadweight increases and cause the danger that comes off.
The utility model content
Technical problem to be solved in the utility model is that the porosity of existing sound absorption material can't satisfy the demand of administering low-frequency noise, and material is applied to run into when outdoor wet environment and absorbs moisture and cause the material hole to change, and low-frequency noise can not effectively be administered.The utility model provides a kind of compound every the gobo baffle for this reason, and well the noise in the absorbing environmental is isolated noise simultaneously, avoids noise that surrounding environment is exerted an influence.
For achieving the above object, the technical scheme that the utility model adopted is: a kind of compound every the gobo baffle, comprise that front panel, backplate and bonding are fixed in the core between the two panels, described core is stripe-arrangement, and its machine direction is perpendicular with front panel and backplate, the compound of described front panel and backplate junction is provided with many tongues tongue and groove every gobo baffle two sides, many tongues tongue and groove of described two sides can be pegged graft mutually, described front panel is a perforated panel, is distributed with perforated percentage on it and is 3<~30% micropore;
The porosity of described core is 97%~98.4%, and the average diameter of its fiber is 5~6 microns, and its fibre length is 150~200 millimeters;
The noise sound wave is in described micropore enters described core, and along the machine direction incident of described core and be absorbed.
The fibre length of described core is 160~180 millimeters.
Described core is the centrifugally glass-wool sound absorption material that contains hydrophober, and the hydrophobic rate of described core is 98~99.95%.
Described hydrophober is 0.3~0.8% of centrifugally glass-wool weight.
Described hydrophober is organic siliconresin or organosilicon macromolecule surfactant.
Described micropore is that the aperture is the circular hole of 1~5mm.
Described micropore is ellipse, rhombus or Long Circle.
Be provided with waterproof ventilated membrane between described front panel and the sound absorption material.
Described waterproof ventilated membrane is glass fabric, nonwoven or PET waterproof ventilated membrane.
Front panel and backplate are steel plate or aluminium alloy plate.
Described front panel and backplate are provided with the ribs of concave or convex.
Described many tongues tongue and groove is to be interconnected to form after bending by described front panel and backplate; Be filled with polyurathamc in described many tongues tongue and groove.
The utility model is with respect to beneficial effect that prior art produced:
A. utility model of the present utility model is artificially administered the noise pollution that high-speed railway produces, and compound core every the gobo baffle has been carried out a large amount of experiments, has found the material that can effectively absorb the high-speed railway noise.The average fibre diameter of can be satisfactory compound core every the gobo baffle is 5~6 microns, fibre length is 150~200 millimeters, and porosity is required to be at 97%~98.4% o'clock, and sound wave arrives in the core, causes the vibration of air molecule and core fiber in the space.Because the viscosity resistance of air and the friction of air molecule and pore wall, acoustic energy is converted into heat energy and loss, thereby acoustically effective is best.For making compound acoustically effective every the gobo baffle of the present utility model reach best, utility model people also improves the percent opening of its front panel, makes its scope between 3~30%.Cooperatively interacting of the micropore of described front panel and the core of above-mentioned selected porosity adds the characteristic of selected fiber itself, and core is because friction and vibration consumed energy take place in the effect of sound wave.Simultaneously of the present utility modelly compoundly after absorbing steam, the gobo baffle is condensed into water droplet, because the high hydrophobic energy of sound absorption material, water droplet can not be adsorbed on the core fiber, can discharge by drain hole smoothly, can reduce compound every the gobo baffle under wet environment because the sound absorbing capabilities that the influence of water droplet causes reduces problem, can also prevent compoundly increases cause out of danger every the deadweight of gobo baffle.
Adverse effect when porosity is outside above-mentioned scope: core thickness is constant, and porosity reduces, and the medium and low frequency sound absorption coefficient increases; But when porosity was reduced to a certain degree, it is closely knit that material becomes, and flow resistance is greater than best flow resistance, and sound absorption coefficient descends on the contrary.If the porosity of selected core is higher than 98.4%, then can be owing to the interfibrous hole of core is excessive, make that acoustic energy is difficult for being transformed absorbing, influence acoustically effective, if the porosity of selected core is lower than 97%, then can be owing to the interfibrous space of core is too small, the air flow resistance is unfavorable for the absorption of shield plates to sound wave greater than best flow resistance.
Fig. 9 and Figure 10 are respectively and measure thickness 100mm, porosity is 97.44% the sound absorption coefficient curve map of glass wool under two kinds of placement situations, by the sound absorption coefficient curve map of Fig. 9 and Figure 10 as can be seen, when measured piece is in medium and low frequency, be greater than with the sound absorption coefficient under the condition perpendicular to machine direction along the sound absorption coefficient of microglass fiber direction.Be respectively 0.32 and 0.45 such as the sound absorption coefficient under 100Hz and 125Hz among Fig. 9, and be respectively 0.47 and 0.58, as shown in figure 10 with the sound absorption coefficient of condition lower edge microglass fiber direction.
B. owing to of the present utility modelly compoundly be mounted in outdoorly every the gobo baffle, and its surface is covered with micropore, so core requires to have higher hydrophobicity.The utility model mixes centrifugally glass-wool with hydrophober, make core hydrophobic rate reach 98~99.95%, and its hydrophobic performance also reaches effect preferably, has avoided " capillarity " that causes because of porosity is excessive.Even run into wet weather, water in the core and steam also can make water owing to the high hydrophobic of core after the hole of core is assembled, flow out along compound micropore every gobo baffle surface, well avoid compound and cause deadweight to increase, reduced the compound danger that comes off every the gobo baffle every the moisture absorption of gobo baffle.
C. after sound absorption material overturns through slitting, machine direction is perpendicular to panel and backboard, be equivalent to not have several vertical supports perforated panel and backplate are linked together,, and then guaranteed integrally-built intensity because the supporting role of many fibers makes the decrement of sound absorption material very little.Used core is a glass wool simultaneously, its fibre diameter is little and fibre length is long, make core fiber unit weight height, the fiber number that unit area contains is many, core fibre strength height, core is fibroplastic makes a concerted effort greatlyyer, guarantees that core has good strength support backboard and panel, and the sheet material Shi Buhui that is squeezed is out of shape.Effectively improved intensity every the gobo baffle.
D. between perforated panel and sound absorption core, be provided with waterproof ventilated membrane, for guaranteeing the drying of sound absorption material when the outdoor installation of gobo baffle, avoid rainwater that the sound absorption material performance is exerted an influence, use waterproof ventilated membrane as veneer, not only prevent and treat sound absorption material expose the influence attractive in appearance, and can stop rainwater to infiltrate, because waterproof ventilated membrane has micropore to have ventilative effect, can the acoustically effective of sound absorption material not exerted an influence simultaneously; Contain hydrophober in the employed in addition glass wool, the rainwater of avoiding entering in the core is absorbed by core, guarantees that core has long application life and good acoustically effective.
E. connect tongue and groove and adopt many tongues tongue-and-groove structure, many tongues tongue and groove tongue is equivalent to be provided with the multiple tracks longitudinal framing on shield plates, strengthen the Wind-Pressure Resistance ability of shield plates integral body, also increase its sealing performance and intensity simultaneously, prevent that rainwater from infiltrating in the sound absorption material through the tongue and groove place, in addition, utilize the non-deformability of the concavo-convex rib increase shield plates on perforated panel and the backplate.
Description of drawings
Below in conjunction with accompanying drawing and case study on implementation the utility model is further specified:
Fig. 1 is the overall construction drawing of utility model;
Fig. 2 is Fig. 1 cross-sectional configuration figure;
Fig. 3 is a kind of embodiment of utility model;
Fig. 4 is the another kind of embodiment of utility model;
Fig. 5 is a random incidence sound absorption coefficient frequency characteristic of the present utility model;
Fig. 6 is a sound insulation characteristics curve of the present utility model;
Fig. 7 is an installation drawing of the present utility model;
Fig. 8 is the left view of Fig. 7;
Fig. 9 is perpendicular to the glass wool sound absorption coefficient figure of microglass fiber direction detection;
Figure 10 is the glass wool sound absorption coefficient figure along the microglass fiber direction detection.
1. front panels among the figure, 2. core, 3. backplate, 4. tongue and groove, 5. polyurethane, 6. waterproof ventilated membrane 7. stiffening ribs 8. rainhats 9. fixed block 10.H steel posts 11. basic 12. bolt parts.
The specific embodiment
Embodiment 1
As shown in Figure 1, a kind of compound every the gobo baffle, comprise that front panel 1, backplate 3 and bonding are fixed in the core 2 between the two panels, described core 2 is the centrifugally glass-wool sound absorption material, described centrifugally glass-wool sound absorption material is stripe-arrangement, and its machine direction is perpendicular with front panel 1 and backplate 3, the compound of described front panel 1 and backplate 3 junctions is provided with many tongues tongue and groove 4 every gobo baffle two sides, many tongues tongue and groove 4 of described two sides can be pegged graft mutually, described front panel is a perforated panel, is distributed with perforated percentage on it and is 20% micropore; The porosity of described core is 97.44%, and the average diameter of its fiber is 5~6 microns, and its fibre length is 150~200 millimeters; Noise and is absorbed along the machine direction of described core in described micropore enters described core.
Front panel 1 is connected in its both sides with backplate 3, and forms many tongues tongue and groove that adjacent two shield plates can be pegged graft fixing mutually, and tongue and groove inside is filled with polyurethane 5 foaming, has strengthened the intensity of shield plates to a certain extent; Front panel 1 wherein is a perforated panel, is evenly distributed with micropore on the perforated panel, and micropore is shaped as circle, various ways such as ellipse, rhombus, slotted hole.If micropore is shaped as circle, its aperture can be between 1~5mm.
For realizing better acoustically effective, the slag ball content that requires centrifugally glass-wool is less than 0.1%.
Backplate 1 wherein can adopt the processing of boring a hole of materials such as steel plate, aluminium alloy plate.Backplate thickness can require to adjust according to the equipment sound insulation factor, and wherein sound insulation factor increases and increases along with backplate thickness, can increase the thickness of backplate when the high sound insulation factor shield plates of needs.
According to the helmholtz resonance principle, the size of sound absorbing capabilities spectral characteristic and micropore is closed, according to the frequency spectrum of the sound source of required improvement, can design the sound barrier panel in different apertures, noise to certain frequency range absorbs targetedly, so that better reach the noise reduction of sound barrier, such as use
The perforated plate in aperture, perforated percentage about 25%, sound absorption frequency peak are about 500Hz, and reducing piercing aperture sound absorption frequency peak can move to high frequency, and increasing piercing aperture sound absorption frequency peak can move to low frequency.
For strengthening the assimilation effect of sound absorption material to noise, the machine direction of sound absorption material wherein is perpendicular with perforated panel.
As shown in Figure 2, one deck waterproof ventilated membrane 6 is set between perforated panel and sound absorption material, waterproof ventilated membrane 6 is a glass fabric, nonwoven and PET waterproof ventilated membrane etc.
For keeping the integral rigidity of whole shield plates, on perforated panel and backplate 3, a plurality of ribs are set, as shown in Figure 3 and Figure 4, wherein be provided with recessed ribs 7 along perforated panel and backplate 3 length directions among Fig. 3; And being provided with protruding ribs 7 along the perforated panel length direction among Fig. 4, its backplate is provided with recessed ribs 7.
The front panel every the gobo baffle that is adopted in table 1 and the table 2 is the thick perforation steel plate with baking paint of 0.8mm, and its aperture is 2.5mm, and perforated percentage is 20%, and core is a glass wool, and its porosity is 97.44%, adopts the glass wool cloth parcel.Used backplate every the gobo baffle is the thick steel plate with baking paint of 0.8mm, and its detection curve as shown in Figure 5 and Figure 6.
By the detection of sound absorption coefficient, the noise reduction coefficient NRC that draws test specimen equals 0.90, reaches the I level index request of " the sound absorbing capabilities classification of building sound absorption product ";
By the detection to the sound insulation characteristics of the utility model test block, drawing the utility model is 37dB (A) every the weighted transmission loss of gobo baffle.
Table 1 is compound every gobo baffle sound absorbing capabilities and spectral characteristic
Table 2 is compound every gobo baffle sound insulation property and spectral characteristic
Installing and of the present utility modelly make it to form every the absorbent lined barrier system every the gobo baffle, as shown in Figure 7 and Figure 8, is that two are coupled together by many tongues tongue and groove 4 every the gobo baffle.At first H steel post 10 is fixed on the basis 11, is fixed on the H steel post 10 by fixed block 9 every the gobo baffle of the present utility model then by bolt part 12.And, prevent that being subjected to rainwater every the gobo baffle drenches every the top of gobo baffle installation rainhat 8.
Described compound structure every the gobo baffle is with embodiment 1.It is 4% micropore that wherein said front panel is distributed with perforated percentage; The porosity of described core is 98%, and the average diameter of its fiber is 5~6 microns, and its fibre length is 160~180 millimeters; Described core is the centrifugally glass-wool sound absorption material that contains hydrophober, and described hydrophober is 0.3% of centrifugally glass-wool weight.The hydrophobic rate of described material is 98%.Described hydrophober is organic siliconresin, gets the embodiment 1 that its method of modifying is seen the CN101531893A record through three carboxyl polydimethylsiloxane--modified by phenolic resins.
Described compound structure every the gobo baffle is with embodiment 1.It is 30% micropore that wherein said front panel is distributed with perforated percentage; The porosity of described core is 98.4%, and the average diameter of its fiber is 5~6 microns, and its fibre length is 160~180 millimeters; Described core is the centrifugally glass-wool sound absorption material that contains hydrophober, and described hydrophober is 0.8% of centrifugally glass-wool weight.The hydrophobic rate of described material is 99.95%.Described hydrophober is organosilicon macromolecule surfactant α, alpha, omega-dihydroxy polydimethyl siloxane.
Described compound structure every the gobo baffle is with embodiment 1.It is 15% micropore that wherein said front panel is distributed with perforated percentage; The porosity of described core is 97.5%, and the average diameter of its fiber is 5~6 microns, and its fibre length is 160~180 millimeters; Described core is the centrifugally glass-wool sound absorption material that contains hydrophober, and described hydrophober is 0.8% of centrifugally glass-wool weight.The hydrophobic rate of described material is 98.5%.Described hydrophober is organic siliconresin, gets the embodiment 1 that its method of modifying is seen the CN101531893A record through three carboxyl polydimethylsiloxane--modified by phenolic resins.
The utility model also can have other variation, and as well known to those of ordinary skill in the art, the foregoing description only plays the exemplary role in the above-mentioned utility model protection scope.For those of ordinary skills, also have a lot of conventional distortion and other embodiment in the protection domain that the utility model limited, these distortion and embodiment will be within protection domains of the present utility model.
Claims (9)
- One kind compound every the gobo baffle, comprise that front panel, backplate and bonding are fixed in the core between the two panels, described core is stripe-arrangement, and its machine direction is perpendicular with front panel and backplate, the compound of described front panel and backplate junction is provided with many tongues tongue and groove every gobo baffle two sides, many tongues tongue and groove of described two sides can be pegged graft mutually, it is characterized in that:Described front panel is a perforated panel, is distributed with perforated percentage on it and is 3<~30% micropore;The porosity of described core is 97%~~98.4%, and the average diameter of its fiber is 5~6 microns, and its fibre length is 150~200 millimeters.
- 2. according to claim 1 compound every the gobo baffle, it is characterized in that: the fibre length of described core is 160~180 millimeters.
- 3. according to claim 1 compound every the gobo baffle, it is characterized in that: described micropore is that the aperture is the circular hole of 1~5mm.
- 4. according to claim 1 compound every the gobo baffle, it is characterized in that: described micropore is ellipse, rhombus or Long Circle.
- 5. arbitrary described compound every the gobo baffle according to claim 1-4, it is characterized in that: be provided with waterproof ventilated membrane between described front panel and the sound absorption material.
- 6. according to claim 5 compound every the gobo baffle, it is characterized in that: described waterproof ventilated membrane is glass fabric, nonwoven or PET waterproof ventilated membrane.
- 7. described compound every the gobo baffle according to the arbitrary claim of claim 1-4, it is characterized in that: front panel and backplate are steel plate or aluminium alloy plate.
- 8. according to claim 7 compound every the gobo baffle, it is characterized in that: described front panel and backplate are provided with the ribs of concave or convex.
- 9. according to claim 7 compound every the gobo baffle, it is characterized in that:Described many tongues tongue and groove is to be interconnected to form after bending by described front panel and backplate; Be filled with polyurathamc in described many tongues tongue and groove.
Priority Applications (1)
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CN201020577234XU CN201933425U (en) | 2010-10-20 | 2010-10-20 | Composite noise insulating and absorbing barrier plate |
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CN201020577234XU CN201933425U (en) | 2010-10-20 | 2010-10-20 | Composite noise insulating and absorbing barrier plate |
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CN201933425U true CN201933425U (en) | 2011-08-17 |
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CN201020577234XU Expired - Lifetime CN201933425U (en) | 2010-10-20 | 2010-10-20 | Composite noise insulating and absorbing barrier plate |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101982613A (en) * | 2010-10-20 | 2011-03-02 | 北京士兴钢结构有限公司 | Compound sound insulation-absorption barrier board |
CN104631354A (en) * | 2015-02-15 | 2015-05-20 | 青岛声达技术有限公司 | Sound absorbing device used for U-beam composite structure of light rail |
-
2010
- 2010-10-20 CN CN201020577234XU patent/CN201933425U/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101982613A (en) * | 2010-10-20 | 2011-03-02 | 北京士兴钢结构有限公司 | Compound sound insulation-absorption barrier board |
CN104631354A (en) * | 2015-02-15 | 2015-05-20 | 青岛声达技术有限公司 | Sound absorbing device used for U-beam composite structure of light rail |
CN104631354B (en) * | 2015-02-15 | 2017-05-17 | 青岛声达技术有限公司 | Sound absorbing device used for U-beam composite structure of light rail |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
AV01 | Patent right actively abandoned |
Granted publication date: 20110817 Effective date of abandoning: 20120516 |