CN202327404U - Noise reduction air pipe - Google Patents
Noise reduction air pipe Download PDFInfo
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- CN202327404U CN202327404U CN2011204991999U CN201120499199U CN202327404U CN 202327404 U CN202327404 U CN 202327404U CN 2011204991999 U CN2011204991999 U CN 2011204991999U CN 201120499199 U CN201120499199 U CN 201120499199U CN 202327404 U CN202327404 U CN 202327404U
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- noise reduction
- sound
- flaggy
- noise
- airduct
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Abstract
The utility model relates to a noise reduction air tube, which comprises a tubular body, wherein the wall of the tubular body is formed by fixing a sound absorption board layer, a sound isolation board layer and a maintenance board layer through fireproof adhesives from inside to outside sequentially. A large amount of noise and air resistance can be reduced; and the noise reduction air tube has the characteristics of noise reduction, energy conservation and environment friendliness.
Description
Technical field
The utility model relates to a kind of noise reduction airduct.
Background technique
Along with improving constantly of China's living standards of the people; The status of ventilation and air conditioning engineering in construction engineering is more and more important; Market to the ventilation duct material require increasingly high; The kind of air conditioner ventilation pipeline from original more single galvanized steel plain sheet airduct and cement airduct, glass fibre reinforced plastic blast pipe etc. to the development of diversity aspect, noise elimination, energy-saving and environmental protection, in light weight, leading material that material that fireproof performance is high becomes the air conditioner ventilation pipeline gradually.
Ventiduct system is applied to fields such as air-conditioning, industrial ventilation, dedusting and strength conveying, at air-supply, air draft, the gas exhaust duct of engineerings such as people's air defense, basement, especially needs the frpf zone to be used widely in the building; Generally, need select the silencing apparatus product for use in order to reduce noise; Be installed on blower fan outlet and air blowing opening etc.; Concentrate and to carry out air-treatment, like cooling, heating, humidification, dry, purification etc., send into indoor again; Ventilation, air-conditioning system have often also been brought the noise that continues, like a noise of air-conditioning equipment when the air that brings temperature and humidity to suit to people; The secondary noise that valve body, pipe fitting etc. are located to produce, and because of the supply air duct and the exhaust outlet air output of central air conditioning are big, wind speed is fast; Reasons such as air-borne sound; Lasting aerodynamic noise often occurs, have a strong impact on personnel's proper functioning, rest, if can not effectively solve the physical and mental health that will influence personnel.
At present, the air conditioner air-line system that adopts on the market mainly adopts compositions such as air-conditioning draught fan, airduct, silencing apparatus; The tradition airduct mainly contains sheet metal airduct, glass fibre composite air duct, magnesia oxychloride cement airduct, hydraulicity inorganic glass fibre reinforced plastic blast pipe etc.; These airduct anti-acoustic capabilities are not enough, will reach the noise elimination noise reduction effect in the use, must be in pipeline the extra silencing apparatus that installs additional; And silencing apparatus will reach due effect; It is provided with the position has certain requirement, is difficult to accomplish in the actual engineering, causes actual noise elimination effect also to be difficult to guarantee.
Summary of the invention
The utility model technical problem to be solved provides a kind of noise reduction airduct, and it can reduce noise and windage in a large number, has the characteristics of noise reduction, energy-conservation and environmental protection.
For solving the problems of the technologies described above, the utility model adopts following technical proposals: a kind of noise reduction airduct, comprise tubular body, and said tubular body wall is from inside to outside successively by sound-absorbing flaggy, sound insulation flaggy with safeguard that flaggy fixedly constitutes through the fireproof bonding agent.
Said sound-absorbing flaggy material is the perforated metal acoustic board, and the thickness of said perforated metal acoustic board is 1～3mm, and sound absorbent perforated structure develops from single cavity resonance sound absorption structure (helmholtz resonance chamber); The enclosed cavity that has little caliber, when the air molecule in the aperture received the sound wave excited vibrational, because friction and drag effect, a part of acoustic energy was consumed, thereby reaches the purpose of sound absorption; With a lot of independent pore-throats and cavity parallel connection, promptly become the porous sound absorbent perforated structure; Warp was tested the perforated plate percent opening greater than 20% o'clock, its resonance qualitly variation, and perforated plate only plays the mask effect, so the punching rate of sound absorbent perforated structure should be less than 20%; The sound absorbent perforated structure resonant frequency also changes with distance, thickness of slab, aperture, the pitch-row of perforated plate plate from the back; Usually require resonant frequency at 100～4000Hz, so plate thickness is generally 2～13mm, the aperture is φ 2～φ 8mm, and pitch-row is 10～100mm, and cavity is 6～100 deeply behind the perforated plate, and the resonance sound-absorbing coefficient is about 0.3～0.5.
The material of said sound insulation flaggy is rock cotton board (density 80kg/m
3), the thickness of said rock cotton board is 45～55mm, and the rock cotton board fiber belongs to the fiber multihole acoustic damping materials, and rock wool is to get rid of to draw after the basalt fusing to form, and fiber diameter is generally about 10 μ; Sound absorbing capabilities and the centrifugally glass-wool of rock wool are approaching, the unit weight 80kg/m that 5cm is thick
3Rock wool and 24kg/m
3The centrifugally glass-wool sound absorbing capabilities suitable, NRC about about 0.95; The rock wool interlayer belongs to the fiber multihole acoustic damping materials, and de-noising mechanism is the hole that material internal has small in a large number connection, and sound wave can go deep into material internal along these holes, with material generation rubbing action acoustic energy is converted into heat energy; The necessary condition of porous material noise reduction is: material has a large amount of spaces, interconnects between the space, and hole gos deep into material internal.
Saidly safeguard that the material of flaggy is the ceramic fiber warming plate; The thickness of said ceramic fiber warming plate is 6～10mm, and the ceramic fiber warming plate belongs to the high-strength light green environmental protection plate, is used for skin; Can play the maintenance panel effect; Again can energy-saving heat preserving, and can effectively insulate against sound the anatomical noise acoustic energy propagates; High product performance, environmental protection in use can not produce toxic gas or radiation; In light weight, intensity is high, good toughness, can keep stable performance, the wet rate that rises, contract with dry rate are low; Have waterproof, protection against the tide, frost protection performance, sheet material meets the GB8624 standard, belongs to country and does not fire A level material; During breaking out of fire, sheet material can not burn yet, and can not produce toxic fume, no flame transmission; The sheet material heat conducting coefficient is low, and heat-shielding performance is good, has good thermal insulation property; Anti-aging, good endurance, it is rotten not go mouldy, anti-damaging by worms; Weatherability is fabulous, and the dried state bending strength >=13Mpa of gas not only has tough structure, and dimensionally stable is indeformable, easy to process simultaneously.
A kind of principle of noise reduction of noise reduction airduct:
Noise reduction is the phenomenon that sound wave strikes energy loss behind the material surface, and noise reduction can reduce indoor sound pressure level.
Have different noise reduction coefficients on the different frequency; The normal noise reduction coefficient NRC that uses estimates the anti-acoustic capability in the language frequency scope roughly in engineering, and this numerical value is material 250,500, the arithmetic mean value of the noise reduction coefficient of 1K, four frequencies of 2K, round to 0.05; It is generally acknowledged that NRC is a reflecting material less than 0.2 material, NRC just is considered to acoustic damping materials greater than the material that waits 0.2; When needs absorb a large amount of acoustic energy reduction space reverberation and noise, usually need use the material of high noise reduction coefficient; The rock cotton board that the utility model adopted is high NRC acoustic damping materials.
When being bonded on this type noise reduction, perforated metal panel and rock wool interlayer be called as the helmholtz resonance noise reduction; Principle of noise reduction is similar to the acoustic resonance of thermos flask; The material space outerpace is connected through narrow bottleneck with internal cavity; During sound wave incident, on resonant frequency, the acoustic energy that produced violent resonance effect loss between the air of neck and the inner space.
A kind of noise reduction characteristics of noise reduction airduct:
The perforated metal panel sound absorption structure that a kind of noise reduction airduct internal layer is adopted develops from single cavity resonance sound absorption structure (helmholtz resonance chamber); The enclosed cavity that has little caliber, when the air molecule in the aperture received the sound wave excited vibrational, because friction and drag effect, a part of acoustic energy was consumed, thereby reaches the purpose of sound absorption; With a lot of independent pore-throats and cavity parallel connection, promptly become the porous sound absorbent perforated structure; Warp was tested the perforated plate percent opening greater than 20% o'clock, its resonance qualitly variation, and perforated plate only plays the mask effect, so the punching rate of sound absorbent perforated structure should be less than 20%; The sound absorbent perforated structure resonant frequency also changes with distance, thickness of slab, aperture, the pitch-row of perforated plate plate from the back; Usually require resonant frequency at 100～4000Hz, so plate thickness is generally 2～13mm, the aperture is φ 2～φ 8mm, and pitch-row is 10～100mm, and cavity is 6～100 deeply behind the perforated plate, and the resonance sound-absorbing coefficient is about 0.3～0.5.
Compare with silencing apparatus, the effect of silencing apparatus is to allow the air communication mistake, can stop or weaken acoustic energy again and outwards propagate; And the compound denoising structure of noise reduction airduct can reduce the resistance of pipeline wind, can play the noise reduction effect again; When air communication was crossed the noise reduction airduct, noise acoustic energy passed the perforated metal thin plate, got into the interlayer rock wool layer; Acoustic energy is effectively consumed, and stops at last on the ceramic fiber warming plate; Form one between the interlayer and go back to the chamber, add the effect of rock wool sound absorption and noise reduction material, fully the absorption of noise energy.
The noise reduction airduct of the utility model is compared with other material, can save traditional thermal insulation layer; Reduce the thickness of thermal insulation layer, can increase pipeline configuration intensity again, appearance is handsome in appearance; Be suitable for bright dress, also can adopt multicolor finish to decorate, thereby reach and the surrounding environment harmony.
The noise reduction airduct of the utility model is because of it has the major transformation of all products in the past (collect compound, insulation, the noise reduction absorbent treatment is an one, has decrease of noise functions); Not only the life-span is long, in light weight, conserve space, and insulation, noise reduction are eliminated the noise and settled at one go, in the scope that pressure-bearing allows; Also can reach and reduce the airduct section through wind speed in suitably increase is managed in the scope of permission; Save the tubing consumption, the auxiliary wind moving noise of air-line system can be eliminated by the noise elimination noise reduction function of airduct; But also can save about gross investment 5 %～20 %, economical and practical.
The noise reduction airduct has that noise reduction, insulation, fire prevention, protection against the tide, inleakage are little, stable performance, advantage such as economic and practical; Broadening noise elimination frequency band to greatest extent is to realize good noise elimination noise reduction effect; Its material is light, and carry and hang easily, convenient, the easy construction of scene modification, it is convenient to assemble, and the tie point that need seal is few, saves installing space, long working life, the price performance optimum, comprehensive cost is low; Especially nervous in the space, the strict occasion of noise control, its advantage is more outstanding.
The length that the noise reduction airduct is installed on the blower fan outlet port is 4～5 meters, and the length that is installed on each exhaust outlet place, room is 2～3 meters, so can reduce the use of the baffler in the supply air system.
The utlity model has noise elimination, insulation, fire prevention, protection against the tide, inleakage is little and constitutionally stable characteristics.
Description of drawings
Fig. 1 is a kind of noise reduction airduct of the utility model structural representation.
Fig. 2 is a kind of noise reduction airduct of the utility model tube wall plate construction schematic representation.
Fig. 3 is a kind of noise reduction airduct of the utility model tube wall sheet material section structure for amplifying schematic representation.
Embodiment
Shown in Fig. 1～3, a kind of noise reduction airduct comprises tubular body 1, and said tubular body wall is from inside to outside successively by sound-absorbing flaggy 11, sound insulation flaggy 12 with safeguard that flaggy 13 fixedly constitutes through the fireproof bonding agent.
Said sound-absorbing flaggy 11 materials are perforated metal acoustic boards, and the thickness of said perforated metal acoustic board is 2mm.
The material of said sound insulation flaggy 12 is rock cotton board, and the thickness of said rock cotton board is 50mm.
Saidly safeguard that the material of flaggy 13 is ceramic fiber warming plates, the thickness of said ceramic fiber warming plate is 8mm.
As stated, a kind of noise reduction airduct of the utility model, described embodiment and figure; It is the utility model implementation result preferably; Be not to be confined to the utility model, approximate, identical person such as the structure of every and the utility model, characteristic all should belong to the scope of the utility model protection.
Claims (4)
1. a noise reduction airduct comprises tubular body (1); It is characterized in that: said tubular body wall is from inside to outside successively by sound-absorbing flaggy (11), sound insulation flaggy (12) with safeguard that flaggy (13) constitutes through the fireproof bonding agent is fixing.
2. a kind of noise reduction airduct according to claim 1 is characterized in that: said sound-absorbing flaggy (11) material is the perforated metal acoustic board, and the thickness of said perforated metal acoustic board is 1～3mm.
3. a kind of noise reduction airduct according to claim 1 is characterized in that: the material of said sound insulation flaggy (12) is a rock cotton board, and the thickness of said rock cotton board is 45～55mm.
4. according to claim 1,2 or 3 described a kind of noise reduction airducts, it is characterized in that: saidly safeguard that the material of flaggy (13) is the ceramic fiber warming plate, the thickness of said ceramic fiber warming plate is 6～10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204991999U CN202327404U (en) | 2011-12-05 | 2011-12-05 | Noise reduction air pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204991999U CN202327404U (en) | 2011-12-05 | 2011-12-05 | Noise reduction air pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202327404U true CN202327404U (en) | 2012-07-11 |
Family
ID=46439383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204991999U Expired - Lifetime CN202327404U (en) | 2011-12-05 | 2011-12-05 | Noise reduction air pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202327404U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185370A (en) * | 2013-04-24 | 2013-07-03 | 青岛沃泰水技术设备制造有限公司 | Intelligent heat supplier |
| CN107084295A (en) * | 2017-06-13 | 2017-08-22 | 长沙新奥燃气有限公司 | A kind of noise reducing plate at tube bends |
| CN108212326A (en) * | 2018-01-03 | 2018-06-29 | 中农鸿笙有限公司 | A kind of continous way niblet rapidly crushing finishes processing system |
-
2011
- 2011-12-05 CN CN2011204991999U patent/CN202327404U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185370A (en) * | 2013-04-24 | 2013-07-03 | 青岛沃泰水技术设备制造有限公司 | Intelligent heat supplier |
| CN107084295A (en) * | 2017-06-13 | 2017-08-22 | 长沙新奥燃气有限公司 | A kind of noise reducing plate at tube bends |
| CN108212326A (en) * | 2018-01-03 | 2018-06-29 | 中农鸿笙有限公司 | A kind of continous way niblet rapidly crushing finishes processing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120711 |