CN105429012A - Noise reduction device for reducing low-frequency noises of transformer station based on foam aluminium alloy - Google Patents
Noise reduction device for reducing low-frequency noises of transformer station based on foam aluminium alloy Download PDFInfo
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- CN105429012A CN105429012A CN201510749154.5A CN201510749154A CN105429012A CN 105429012 A CN105429012 A CN 105429012A CN 201510749154 A CN201510749154 A CN 201510749154A CN 105429012 A CN105429012 A CN 105429012A
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- aluminium alloy
- foam aluminium
- stainless steel
- transformer station
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention discloses a noise reduction device for reducing low-frequency noises of a transformer station based on a foam aluminium alloy. The device comprises a single-side micropore stainless steel panel and three zinc-plated stainless steel panels, wherein the single-side micropore stainless steel panel and three zinc-plated stainless steel panels are fixed together through screws to form a four-side closed cube-shaped structure. The interior of the four-side closed cube-shaped structure is sequentially provided with a foam aluminium alloy layer, a sound absorption asbestos layer and an air layer along one side of the single-side micropore stainless steel panel. A keel is disposed between the sound absorption asbestos layer and the air layer. The foam aluminium alloy layer is horizontally provided with a through hole. The device employs the foam aluminium alloy as the main body material, is good in sound absorption effect, is light in overall weight, is convenient for installation and transportation, directly forms a resonance cavity during installation, and facilitates the reduction of the low-frequency noises.
Description
Technical field
The invention belongs to noise reducing apparatus technical field, relate to a kind of denoising device of the reduction transformer station low-frequency noise based on foam aluminium alloy.
Background technology
In recent years, the propelling of urbanization process is progressively raised speed, and industry and resident increase swift and violent to need for electricity, increasing substation location is deep into down town.But in short supply due to urban land resource, also exacerbates the difficulty of substation site selection, causes the close together of part transformer station and residential block.The law of environmental protection simultaneously, improving of regulation and improving constantly of Public environmental attitude, consciousness and the cry of noise control pollution, protection of the environment are also more and more higher.During the peak of power consumption of particularly northern area winter and summer, the load factor of transformer station is all very high, and noise is larger; Even underground substation, noise is also the problem that can not be ignored.The resident caused due to noise in recent years complains the trend risen year by year, and the harm problem of noise pollution to surrounding resident resolving transformer station has become the task of top priority of power department.In " State Council's environment Macroscopic Strategy ", power industry transformer station has clearly been classified as noise regulation emphasis, China 2008 will promulgate mandatory noise emission standard " GB12348-2008 Industrial Enterprise Factory Boundary ambient noise discharge standard " end of the year, propose more strict requirement to transformer station in interior industrial enterprise.
Summary of the invention
The object of this invention is to provide a kind of denoising device of the reduction transformer station low-frequency noise based on foam aluminium alloy, solve the problem that the transformer substation in city noise that exists in prior art exceeds standard.
The technical solution adopted in the present invention is, a kind of denoising device of the reduction transformer station low-frequency noise based on foam aluminium alloy, comprise a slice one side micropore stainless steel faceplate and three zinc-plated stainless steel faceplates, described one side micropore stainless steel faceplate and zinc-plated stainless steel faceplate adopt screw to be fixed together, form circumferential closed square body structure, the inside of described square body structure is disposed with foam aluminium alloy layer, sound absorption asbestos layer and air layer along the side of one side micropore stainless steel faceplate.
Further, absorb sound between asbestos layer and air layer and be provided with keel.
Further, on foam aluminium alloy layer, level offers through hole, and the diameter of described through hole is 4mm ~ 6mm, and the spacing of described through hole is 18mm ~ 22mm.
Further, the thickness of foam aluminium alloy layer is 20mm.
Further, in foam aluminium alloy layer, the average diameter of closed foam is 5mm, and mean porosities is 50 ~ 60%.
Further, the thickness of one side micropore stainless steel faceplate and zinc-plated stainless steel faceplate is 1mm.
Further, one side micropore surface stainless steel strip micropore one facing to the outside of square shape structure, the diameter of described micropore is 1.4mm ~ 1.6mm, and the degree of depth is 0.18mm ~ 0.22mm.
Further, the thickness of sound absorption asbestos layer is 30mm.
Further, the thickness of air layer is 80mm ~ 120mm.
The invention has the beneficial effects as follows:
1. adopt foam aluminium alloy as material of main part, acoustically effective is good, is applicable to low-frequency noise;
2. overall structure is that aluminium alloy, stainless steel, fire line are good;
3. overall structure has good corrosion resistance, weatherability, and under low temperature and adverse circumstances, noise reduction hydraulic performance decline degree is low;
4. do not produce dust, there is no peculiar smell, there is no radiation, good environmental protection;
5. basis material and overall structure are metal material, possess the ability of anti-electromagnetic radiation;
6. overall structure has certain intensity, can bear external impact and distortion;
7. overall weight is light, is convenient to install and transport, directly forms resonating cativty during installation, is conducive to reducing low-frequency noise.
Accompanying drawing explanation
Fig. 1 is a kind of structure chart of denoising device of the reduction transformer station low-frequency noise based on foam aluminium alloy.
In figure, 1. one side micropore stainless steel faceplate, 2. foam aluminium alloy layer, 3. absorb sound asbestos layer, 4. air layer, 5. zinc-plated stainless steel faceplate, 6. keel, 7. through hole.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
The denoising device of a kind of reduction transformer station low-frequency noise based on foam aluminium alloy of the present invention, structure as shown in Figure 1, comprise a slice one side micropore stainless steel faceplate 1 and three zinc-plated stainless steel faceplates 5, one side micropore stainless steel faceplate 1 and zinc-plated stainless steel faceplate 5 adopt screw to be fixed together, form circumferential closed square body structure, the inside of square body structure is disposed with foam aluminium alloy layer 2 along the side of one side micropore stainless steel faceplate 1, sound absorption asbestos layer 3 and air layer 4, keel 6 are provided with between sound absorption asbestos layer 3 and air layer 4, on foam aluminium alloy layer 2, level offers through hole 7.
The material of one side micropore stainless steel faceplate 1 is the corrosion resistant plate of thickness 1mm, sound source side external surface micro-pore diameter is 1.4mm ~ 1.6mm, the degree of depth is 0.18mm ~ 0.22mm, mainly plays and carries out absorption and irreflexive effect to low frequency transformer station noise, forms attenuation of the first kind.
Be provided with cap holes in foam aluminium alloy layer 2, the average diameter of closed foam is 5mm, and mean porosities is 50 ~ 60%.Best to the assimilation effect of low-frequency noise through this porosity of test.As closed foam, closed-cell aluminum foam surface is coarse on microcosmic.When being subject to sound wave effect, the air contained in hole produce under sound wave effect vibration and with hole wall friction, formed frictional heat; Simultaneously as the longitudinal sound wave propagated in atmosphere, compress the air in closed pore and stretch, part acoustic energy is also converted into heat energy by this process.Above-mentioned two kinds of conversions can not counter movement, serves main attenuation to sound wave.Foam aluminium alloy hole wall is generally less than 0.5mm, has certain deformability, and hole wall vibration also can play the effect of noise elimination.Also there is the irregular defect of part foamed aluminium inside, such as the hole defect such as triangle, taper, also plays and necessarily absorbs Burning in Effect of Sound Energy.
On foam aluminium alloy layer 2, level offers through hole 7, and the diameter of through hole 7 is 4mm ~ 6mm, and spacing is 18mm ~ 22mm, adds the number of times of sound wave reflection and refraction, improves the sound absorption efficiency of low-frequency sound wave.
The effect of sound absorption asbestos layer 3 is to carry out absorption process to the sound wave of upper frequency further.The thickness chosen through calculating is 30mm, can reach good acoustically effective.
Being provided with keel 6 after sound absorption asbestos layer 3, is to support sound absorption structure on the one hand, is increase sound path on the other hand.
Air layer 4 is in order to sound wave forms resonance therein, realizes the further consumption to acoustic energy.Thickness acoustically effective between 80-120mm through calculating air layer 4 is best.
Test through Chinese Academy of Sciences's acoustic metrology testing station (CMA2013000227K), (report number KS-2015-04102) is based on Reverberation room method test acoustic absorptivity, detect according to GB/T20247-2006/ISO354:2003 " acoustic absorptivity measurements of acoustic reverberation room ", as shown in table 1 to the acoustically effective of main frequency.
Table 1
| Frequency (Hz) | 125 | 160 | 200 | 250 | 400 | 500 | 1000 | 2500 | 3150 |
| Acoustic absorptivity α | 0.59 | 0.93 | 0.98 | 0.81 | 0.73 | 0.66 | 0.59 | 0.67 | 0.87 |
Table 1 can find out that the present invention all has higher acoustic absorptivity to main frequency.
Build fire proofing material detection Co., Ltd (CMA201307157R) through Jilin profit urban construction test and provide examining report, the fire-protection rating of foamed material reaches A1, is the highest ranking of fire-fighting quipment.
Test through Metal Inst., Chinese Academy of Sciences and provide test report, Material compression intensity is 13.83N/mm2, possesses bearing capacity; After stretching, elongation after fracture reaches 98.75%, has high deformability, can adapt to the distortion that low-frequency sound wave causes; Porosity is 53.56%, can produce maximum decay, realize noise reduction requirement to low-frequency noise.
Claims (9)
1. the denoising device based on the reduction transformer station low-frequency noise of foam aluminium alloy, it is characterized in that, comprise a slice one side micropore stainless steel faceplate (1) and three zinc-plated stainless steel faceplates (5), described one side micropore stainless steel faceplate (1) and zinc-plated stainless steel faceplate (5) adopt screw to be fixed together, form circumferential closed square body structure, the inside of described square body structure is disposed with foam aluminium alloy layer (2), sound absorption asbestos layer (3) and air layer (4) along the side of one side micropore stainless steel faceplate (1).
2. the denoising device of a kind of reduction transformer station low-frequency noise based on foam aluminium alloy according to claim 1, is characterized in that, be provided with keel (6) between described sound absorption asbestos layer (3) and air layer (4).
3. the denoising device of a kind of reduction transformer station low-frequency noise based on foam aluminium alloy according to claim 1, it is characterized in that, the upper level of described foam aluminium alloy layer (2) offers through hole (7), the diameter of described through hole (7) is 4mm ~ 6mm, and the spacing of described through hole (7) is 18mm ~ 22mm.
4. the denoising device of a kind of reduction transformer station low-frequency noise based on foam aluminium alloy according to claim 3, it is characterized in that, the thickness of described foam aluminium alloy layer (2) is 20mm.
5. the denoising device of a kind of reduction transformer station low-frequency noise based on foam aluminium alloy according to claim 4, is characterized in that, in described foam aluminium alloy layer (2), the average diameter of closed foam is 5mm, and mean porosities is 50 ~ 60%.
6. the denoising device of a kind of reduction transformer station low-frequency noise based on foam aluminium alloy according to claim 1, it is characterized in that, the thickness of described one side micropore stainless steel faceplate (1) and zinc-plated stainless steel faceplate (5) is 1mm.
7. the denoising device of a kind of reduction transformer station low-frequency noise based on foam aluminium alloy according to claim 6, it is characterized in that, described one side micropore stainless steel faceplate (1) band micropore one facing to the outside of square shape structure, the diameter of described micropore is 1.4mm ~ 1.6mm, and the degree of depth is 0.18mm ~ 0.22mm.
8. the denoising device of a kind of reduction transformer station low-frequency noise based on foam aluminium alloy according to claim 1, it is characterized in that, the thickness of described sound absorption asbestos layer (3) is 30mm.
9. the denoising device of a kind of reduction transformer station low-frequency noise based on foam aluminium alloy according to claim 1, it is characterized in that, the thickness of described air layer (4) is 80mm ~ 120mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510749154.5A CN105429012A (en) | 2015-11-06 | 2015-11-06 | Noise reduction device for reducing low-frequency noises of transformer station based on foam aluminium alloy |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510749154.5A CN105429012A (en) | 2015-11-06 | 2015-11-06 | Noise reduction device for reducing low-frequency noises of transformer station based on foam aluminium alloy |
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| CN105429012A true CN105429012A (en) | 2016-03-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108253858A (en) * | 2018-01-16 | 2018-07-06 | 中国工程物理研究院流体物理研究所 | A kind of anti-knock container sound-insulating structure and its design method |
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| CN203626072U (en) * | 2013-11-29 | 2014-06-04 | 徐香春 | Novel sound absorbing plate |
| CN203626071U (en) * | 2013-11-29 | 2014-06-04 | 徐香春 | Sound absorbing plate |
| CN204356925U (en) * | 2014-12-17 | 2015-05-27 | 国家电网公司 | A kind of indoor substation low frequency absorption denoising device |
| CN204715233U (en) * | 2015-06-24 | 2015-10-21 | 湖北工业大学 | A kind of expressway sound insulation illumination baffle based on flexible solar plate |
| CN204728522U (en) * | 2015-06-29 | 2015-10-28 | 江苏五环建设有限公司 | A kind of sound-proof wall body structure |
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2015
- 2015-11-06 CN CN201510749154.5A patent/CN105429012A/en active Pending
Patent Citations (12)
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| CN2712945Y (en) * | 2004-03-02 | 2005-07-27 | 江苏大学 | Perforated sound-absorbing foamed aluminium |
| CN2694425Y (en) * | 2004-04-16 | 2005-04-20 | 陈月萍 | Micro-boring acoustic board |
| CN101334993A (en) * | 2008-08-04 | 2008-12-31 | 中国科学院力学研究所 | Noise absorbing compound material based on network construction and preparing method thereof |
| CN201314084Y (en) * | 2008-11-17 | 2009-09-23 | 楚杏芬 | Metallic panel absorber |
| CN203160444U (en) * | 2013-03-28 | 2013-08-28 | 国家电网公司 | Structure of sound attenuation wall surface of transformer substation |
| CN203398525U (en) * | 2013-08-30 | 2014-01-15 | 国家电网公司 | Noise-reducing and sound-absorbing device for transformer substation |
| CN103541450A (en) * | 2013-10-19 | 2014-01-29 | 宁夏天地经纬电力设备工程有限公司 | Transformer noise-absorbing denoising structure |
| CN203626072U (en) * | 2013-11-29 | 2014-06-04 | 徐香春 | Novel sound absorbing plate |
| CN203626071U (en) * | 2013-11-29 | 2014-06-04 | 徐香春 | Sound absorbing plate |
| CN204356925U (en) * | 2014-12-17 | 2015-05-27 | 国家电网公司 | A kind of indoor substation low frequency absorption denoising device |
| CN204715233U (en) * | 2015-06-24 | 2015-10-21 | 湖北工业大学 | A kind of expressway sound insulation illumination baffle based on flexible solar plate |
| CN204728522U (en) * | 2015-06-29 | 2015-10-28 | 江苏五环建设有限公司 | A kind of sound-proof wall body structure |
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| CN108253858A (en) * | 2018-01-16 | 2018-07-06 | 中国工程物理研究院流体物理研究所 | A kind of anti-knock container sound-insulating structure and its design method |
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Application publication date: 20160323 |
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