CN2192001Y - Compound silencing elbow for minisize hole plate - Google Patents
Compound silencing elbow for minisize hole plate Download PDFInfo
- Publication number
- CN2192001Y CN2192001Y CN 94215723 CN94215723U CN2192001Y CN 2192001 Y CN2192001 Y CN 2192001Y CN 94215723 CN94215723 CN 94215723 CN 94215723 U CN94215723 U CN 94215723U CN 2192001 Y CN2192001 Y CN 2192001Y
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- CN
- China
- Prior art keywords
- plate
- utility
- model
- perforated plate
- elbow
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- Expired - Fee Related
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- Exhaust Silencers (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The utility model relates to a compound silencing elbow for a plate with minisize holes. The utility model is composed of a casing plate, a reinforcing rib, and a perforated plate. The utility model is characterized in that an extra-fine glass-wool felt sound absorbing plate is arranged along the inner side of the casing plate; a glass cloth is spread on the extra-fine glass-wool felt sound absorbing plate; one perforated plate whose hole diameter is phi 6 mm is arranged; a tiny perforated plate whose hole diameter is phi 2 mm is arranged on an interval hollow chamber and the perforated rate of the tiny perforated plate is larger than 5 % or equal to 5%; a sound absorbing sheet with wedge is arranged in the middle hollow chamber of the silencing elbow along the shaft line of the elbow in parallel arrangement way. The utility model has the advantages the utility model can solve the problem of the elbow part without the silencing performance; the utility model has reasonable structure; the utility model is firm and durable; the utility model has good effect of simultaneously eliminating high, middle, and low frequency noise. The utility model is suitable for the pipeline sound absorbing of the ventilating air conditioning system.
Description
The utility model belongs in ventilation, the air-conditioning system, is used to prevent or suppress the parts of noise, the board-like compound bend muffler of particularly a kind of micro hole.
Fan noise in building ventilation, the air-conditioning system needs to adopt silencer to be decayed.Normal adopt dissipative muffler, reactive muffler arranged because the low frequency acoustic attenuation performance of dissipative muffler is relatively poor, the high frequency acoustic attenuation performance of reactive muffler is not good, and complex muffler is arranged.Be with resistive and reactive muffling principle Combination Design in a silencer, the acoustic characteristics that can have the broad frequency.Its concrete pattern such as micropunch plate muffler just have anechoic frequency bandwidth, and resistance is little, do not need sound-absorbing porous material, and be moisture resistance, heatproof, and gasproof stream such as washes away at characteristics.The architectural feature of micropunch plate muffler is: micro-pore diameter φ=0.2～1.0mm, and low punching rate 0.5～3.0%, cavity depth 50～200mm can be provided with double-deck microperforated panel, to absorb the different noises of low frequency, intermediate frequency or high frequency.At present, in the existing micropunch plate muffler, because micropore is very little, handicapping material not again, the noise elimination effect of centering, high frequency is relatively poor, generally can only eliminate 10～15 decibels (A), can not satisfy the requirement of the basic, normal, high audio-frequency noise of elimination simultaneously.Elbow in the existing ventilating system pipeline is not all established noise elimination acoustical plate and noise elimination acoustic board, does not possess acoustic attenuation performance.
The purpose of this utility model is, designs a kind of ventilation shaft elbow that has muffler plate and acoustical plate, improves the aperture and the punching rate of design perforated plate, can improve the noise elimination effect simultaneously to the inhibition of high, medium and low audio-frequency noise so that accomplish the draft bend position.
The compound bend muffler of small orifice plate of the present utility model, form by Shell Plate, ribs, perforated plate, it is characterized in that, one deck extra-fine glass-wool felt acoustic board is set along the Shell Plate inboard, apply one deck glass wool cloth, the perforated plate of one deck aperture φ 6mm is set, and a cavity is established the small perforated plate of one deck aperture φ 2mm, punching rate 〉=5% more at interval; Ribs and pulling rivet with Z type and U type section are connected and fixed two-layer perforated plate and Shell Plate; In the middle cavities of bend muffler, being arranged in parallel along the elbow axis is provided with the acoustical plate of band wedge, and the acoustical plate of band wedge is filled out the extra-fine glass-wool felt that accompanies the glass wool cloth parcel therebetween and formed by the perforated plate of two-layer aperture φ 3～6mm; Be provided with adapter and flange at the bend muffler two ends.
The compound bend muffler of small orifice plate of the present utility model has advantage and be, solved the problem that bend part does not have acoustic attenuation performance, and is rational in infrastructure, sturdy and durable, can eliminate the effective of high, medium and low audio-frequency noise simultaneously, heat-insulation layer needn't be made in the bend muffler outside, can reduce cost.Be applicable to ventilation, air-conditioning system elimination pipeline internal medium flow air dynamic property noise.
Below in conjunction with drawings and Examples, the utility model is further described.
Fig. 1 is the compound bend muffler structure chart of small orifice plate
Fig. 2 is the I-I profile of Fig. 1
As seen from the figure, the compound bend muffler of small orifice plate of the present utility model, form by Shell Plate, ribs, perforated plate, it is characterized in that, along Shell Plate 1 inboard one deck extra-fine glass-wool felt acoustic board 2 is set, applies one deck glass wool cloth 3, the perforated plate 4 of one deck aperture φ 6mm is set, a cavity is established the small perforated plate 6 of one deck aperture φ 2mm, punching rate 〉=5% more at interval; Ribs 5 and pulling rivet with Z type and U type section are connected and fixed two-layer perforated plate and Shell Plate; In the middle cavities of bend muffler, being arranged in parallel along the elbow axis is provided with the acoustical plate 7 of band wedge, and the acoustical plate of band wedge is filled out the extra-fine glass-wool felt that accompanies the glass wool cloth parcel therebetween and formed by the perforated plate of two-layer aperture φ 3～6mm; Be provided with adapter 8 and flange 9 at the bend muffler two ends.
Claims (1)
1, the compound bend muffler of a kind of small orifice plate, form by Shell Plate, ribs, perforated plate, it is characterized in that, one deck extra-fine glass-wool felt acoustic board is set along the Shell Plate inboard, apply one deck glass wool cloth, the perforated plate of one deck aperture φ 6mm is set, and a cavity is established the small perforated plate of one deck aperture φ 2mm, punching rate 〉=5% more at interval; Ribs and pulling rivet with Z type and U type section are connected and fixed two-layer perforated plate and Shell Plate; In the middle cavities of bend muffler, being arranged in parallel along the elbow axis is provided with the acoustical plate of band wedge, and the acoustical plate of band wedge is filled out the extra-fine glass-wool felt that accompanies the glass wool cloth parcel therebetween and formed by the perforated plate of two-layer aperture φ 3～6mm; Be provided with adapter and flange at the bend muffler two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94215723 CN2192001Y (en) | 1994-06-27 | 1994-06-27 | Compound silencing elbow for minisize hole plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94215723 CN2192001Y (en) | 1994-06-27 | 1994-06-27 | Compound silencing elbow for minisize hole plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2192001Y true CN2192001Y (en) | 1995-03-15 |
Family
ID=33831625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94215723 Expired - Fee Related CN2192001Y (en) | 1994-06-27 | 1994-06-27 | Compound silencing elbow for minisize hole plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2192001Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103383140A (en) * | 2012-05-04 | 2013-11-06 | 美的集团股份有限公司 | Noise reduction structure of indoor unit of air conditioner, indoor unit of air conditioner and air conditioner |
| CN105650392A (en) * | 2015-12-29 | 2016-06-08 | 西安建科门窗有限责任公司 | 90-degree rectangular silencing and denoising elbow used for window-mounted fan and elbow silencing treatment method |
| CN105650393A (en) * | 2015-12-29 | 2016-06-08 | 西安建筑科技大学 | Silencing and denoising dovetail three-way elbow and elbow silencing treatment method |
| CN106224299A (en) * | 2016-08-31 | 2016-12-14 | 山西巨龙风机有限公司 | Except haze high tower special fan |
| CN108592223A (en) * | 2018-03-30 | 2018-09-28 | 黑龙江双兴医用净化工程有限公司 | A kind of clean room ventilation noise elimination sterilization box |
| CN109215627A (en) * | 2017-07-05 | 2019-01-15 | 哈尔滨城林科技股份有限公司 | Efficient noise elimination elbow |
| CN110770511A (en) * | 2017-04-14 | 2020-02-07 | 弗劳恩霍夫应用研究促进协会 | Split muffler assembly with sound absorbing end sides |
| CN114934917A (en) * | 2022-07-21 | 2022-08-23 | 中国航空工业集团公司沈阳空气动力研究所 | Pipeline noise elimination structure for large continuous wind tunnel axial flow compressor |
-
1994
- 1994-06-27 CN CN 94215723 patent/CN2192001Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103383140A (en) * | 2012-05-04 | 2013-11-06 | 美的集团股份有限公司 | Noise reduction structure of indoor unit of air conditioner, indoor unit of air conditioner and air conditioner |
| CN103383140B (en) * | 2012-05-04 | 2016-04-06 | 美的集团股份有限公司 | Indoor air conditioner cabinet denoising structure, indoor air conditioner cabinet and air-conditioner |
| CN105650392A (en) * | 2015-12-29 | 2016-06-08 | 西安建科门窗有限责任公司 | 90-degree rectangular silencing and denoising elbow used for window-mounted fan and elbow silencing treatment method |
| CN105650393A (en) * | 2015-12-29 | 2016-06-08 | 西安建筑科技大学 | Silencing and denoising dovetail three-way elbow and elbow silencing treatment method |
| CN106224299A (en) * | 2016-08-31 | 2016-12-14 | 山西巨龙风机有限公司 | Except haze high tower special fan |
| CN110770511A (en) * | 2017-04-14 | 2020-02-07 | 弗劳恩霍夫应用研究促进协会 | Split muffler assembly with sound absorbing end sides |
| CN109215627A (en) * | 2017-07-05 | 2019-01-15 | 哈尔滨城林科技股份有限公司 | Efficient noise elimination elbow |
| CN108592223A (en) * | 2018-03-30 | 2018-09-28 | 黑龙江双兴医用净化工程有限公司 | A kind of clean room ventilation noise elimination sterilization box |
| CN114934917A (en) * | 2022-07-21 | 2022-08-23 | 中国航空工业集团公司沈阳空气动力研究所 | Pipeline noise elimination structure for large continuous wind tunnel axial flow compressor |
| CN114934917B (en) * | 2022-07-21 | 2022-09-23 | 中国航空工业集团公司沈阳空气动力研究所 | Pipeline noise elimination structure for large continuous wind tunnel axial flow compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |