CN2221742Y - Pipe-wide band muffler - Google Patents
Pipe-wide band muffler Download PDFInfo
- Publication number
- CN2221742Y CN2221742Y CN 94240548 CN94240548U CN2221742Y CN 2221742 Y CN2221742 Y CN 2221742Y CN 94240548 CN94240548 CN 94240548 CN 94240548 U CN94240548 U CN 94240548U CN 2221742 Y CN2221742 Y CN 2221742Y
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- CN
- China
- Prior art keywords
- muffler
- noise
- pipe
- pipeline
- silencer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Exhaust Silencers (AREA)
Abstract
The utility model provides a pipe type muffler being applied to ventilation air-conditioning engineering, comprising a pipe type casing, a flange, and a noise eliminating body fixedly arranged in the pipe type casing and provided with noise absorbing material. The noise eliminating body is a perforated pipe whose two ends are in curve shape; an armor layer, which can be glass cloth or similar fibre material, is arranged between the external part or the perforated pipe of the noise eliminating body and the noise absorbing material. The diameter of the casing of the muffler is equal to the diameter of the pipeline of the system, enabling the muffler to be convenient to install and insulate heat. The pipe type muffler has the advantages of capable of noise elimination against the high, medium and low-frequency noise in the pipeline in a wider frequency range, lower manufacturing cost, simple technology and small size, being appropriate for engineering.
Description
The utility model relates to the special equipment of eliminating pneumatic noise in blower fan and the pipeline in a kind of ventilation and air conditioning engineering.
Silencer is to allow air communication to cross but can stop or weaken the device of sound wave propagation, is one of major technique measure of reduction air power noise.Be mainly used in blower fan import and export and the air-line system.At present the silencer of using is of a great variety, different, but according to the difference of noise-cancelling theory, roughly can be divided into resistive and resistance two big classes.The noise-cancelling theory of dissipative muffler is, by the sound-absorbing material of frosting on inside pipe wall or the sound absorption of sound absorption structure, makes noise along pipe transmmision with range attenuation, thereby reaches the purpose of noise elimination; Reactive muffler does not directly absorb acoustic energy, wherein the expansion chambers silencer is to utilize the unexpected expansion of pipeline section or shrink to reach the noise elimination purpose, and the expansion type silencer is to make along the noise of pipe transmmision to reflect back to sound source in sudden change place, thereby reaches the purpose of noise elimination.Dissipative muffler and reactive muffler respectively have its pluses and minuses, moulding and structure are varied, their common drawback is that the frequency of noise elimination scope is wide inadequately, simultaneously, because the volume of silencer is comparatively huge, and most and pipeline Different Diameter have the inconvenience part when installing and taking to be incubated measure.The two silencer that combines is called impedance complex formula silencer, it has the effect of eliminating the noise preferably on the frequency band of broad, but version and manufacturing process be more complicated still, the scope of application also is subjected to certain restriction, for example, micropunch plate muffler effect when eliminating the noise of high velocity air is better, and resonator muffler can only be eliminated the frequency noise identical with the resonance sound-absorbing structure eigentone.For wideband noise, use this type of silencer to fall flat.
Goal of the invention of the present utility model exactly in order to overcome these weak points of the prior art, provides a kind of and has that to eliminate noise band wide, resistance is little, and is simple in structure, easy to process, easy-to-install tubular type Broad Band Muffler is to satisfy the needs of eliminating noise in the ventilating engineering.
The utility model belongs to a kind of complex muffler, and its shell is one section pipe, is one section muffler body at the center of shell, muffler body by antipriming pipe with and inner sound-absorbing material form, the two ends of muffler body are conical, play the effect of water conservancy diversion, also can reduce resistance simultaneously.Muffler body is being fixed in the shell of silencer.It at the two ends of shell the flange that is used for system's pipe link.
The shell of silencer can be according to actual needs, make and the identical diameter of pipeline in the system, so just can utilize the flange at silencer two ends can insert pipeline easily, but also be convenient to take the insulation measure so that silencer becomes the part of pipeline.
There is one deck armour layer the antipriming pipe outside of above-mentioned tubular type Broad Band Muffler, also armour layer can be placed between sound-absorbing material and the antipriming pipe inwall.Armour layer adopts good glass cloth or the fabric of permeability.
The utility model can be made series of products according to pipe diameter commonly used, is provided in the corresponding pipeline, and its major advantage has following several:
1. the frequency of noise elimination scope that broad is arranged is that the noise of 63～8000Hz has tangible de-noising effect for centre frequency;
2. it is little that the drag losses that this silencer increases is installed in system, has good aerodynamic quality, through experiment test repeatedly, when flow velocity is 10～15 meter per seconds, the unit length sound deadening capacity of each octave band is 2.3～7 times of silencer in the prior art, and resistance is less than 1mmHO;
3. this silencer can be installed in the intrinsic pipeline as the part of duct length, can not increase the local volume in air channel, is convenient to construction and insulation, can reduce construction costs;
4. to have a volume little, in light weight, simple in structure, easy to process for this silencer, and price only is about the sixth of caprone fiber pipe silencer of same size.
Introduce several embodiment below in conjunction with accompanying drawing:
Fig. 1: tubular type Broad Band Muffler profile
Fig. 2: the installation diagram of tubular type Broad Band Muffler and centrifugal blower and pipeline
Fig. 3: the installation diagram of tubular type Broad Band Muffler and axial flow blower and pipeline
Among the figure: 1-flange, 2-armour layer, 3-muffler body, 4-shell, 5-sound-absorbing material.
Embodiment 1: be installed on diameter and be the silencer in the 250mm air channel, the diameter of its shell is 250mm, material is the galvanized iron sheet of 0.5mm, muffler body is that diameter is the antipriming pipe of 140mm, the two ends of pipe are conical, the sound-absorbing material of interior dress is a glass fibre cotton, wraps up in layer of glass cloth as armour layer at the outer surface of muffler body.The noise reduction calculated data of silencer is as follows:
Centre frequency (Hz): 63 125 250 500 1,000 2,000 4,000 8000
Noise reduction (dB): 135 12 18 19 13 11
Embodiment 2: be installed on diameter and be the silencer in the 400mm air channel, the diameter of its shell is 400mm, material is the galvanized steel plain sheet of 0.75mm, muffler body is that diameter is the antipriming pipe of 280mm, the two ends of pipe are conical, the sound-absorbing material of interior dress is a glass fibre cotton, wraps up in layer of glass cloth as armour layer at the outer surface of muffler body.The noise reduction calculated data of silencer is as follows:
Centre frequency (Hz): 63 125 250 500 1,000 2,000 4,000 8000
Noise reduction (dB): 158 21 24 20 14 12
Embodiment 3: as the silencer of embodiment 1 and embodiment 2, its glass fibre armour layer is every between antipriming pipe inwall and sound-absorbing material.
Claims (5)
1. tubular type Broad Band Muffler, by the flange (1) at shell (4), shell two ends with place the muffler body (3) of enclosure to form, it is characterized in that: said muffler body be fixed on the shell center, two ends are the antipriming pipe of cone, and sound-absorbing material (5) is housed in the muffler body.
2. according to the said tubular type Broad Band Muffler of claim 1, it is characterized in that pipeline is with the footpath, by flange and pipe link in said shell and the system.
3. according to the said tubular type Broad Band Muffler of claim 1, it is characterized in that there is armour layer (2) said antipriming pipe outside.
4. according to the said tubular type Broad Band Muffler of claim 1, it is characterized in that being separated with armour layer between said sound-absorbing material and the antipriming pipe.
5. according to claim 3 and the said tubular type Broad Band Muffler of claim 4, it is characterized in that said armour layer is glass cloth or similar fabric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94240548 CN2221742Y (en) | 1994-05-27 | 1994-05-27 | Pipe-wide band muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94240548 CN2221742Y (en) | 1994-05-27 | 1994-05-27 | Pipe-wide band muffler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2221742Y true CN2221742Y (en) | 1996-03-06 |
Family
ID=33847524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94240548 Expired - Fee Related CN2221742Y (en) | 1994-05-27 | 1994-05-27 | Pipe-wide band muffler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2221742Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101121374B (en) * | 2006-08-07 | 2010-06-09 | 株式会社电装 | Air duct for vehicle air conditioning and air conditioner for vehicle |
| CN101949568A (en) * | 2010-10-19 | 2011-01-19 | 东南大学 | Maze type broadband sound-proof ventilator |
| CN105351256A (en) * | 2015-11-28 | 2016-02-24 | 贵州航天林泉电机有限公司 | Muffler |
| CN106288301A (en) * | 2016-10-10 | 2017-01-04 | 广州康美风空调设备有限公司 | Acoustic filter integrated casing and preparation method thereof |
-
1994
- 1994-05-27 CN CN 94240548 patent/CN2221742Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101121374B (en) * | 2006-08-07 | 2010-06-09 | 株式会社电装 | Air duct for vehicle air conditioning and air conditioner for vehicle |
| CN101949568A (en) * | 2010-10-19 | 2011-01-19 | 东南大学 | Maze type broadband sound-proof ventilator |
| CN105351256A (en) * | 2015-11-28 | 2016-02-24 | 贵州航天林泉电机有限公司 | Muffler |
| CN106288301A (en) * | 2016-10-10 | 2017-01-04 | 广州康美风空调设备有限公司 | Acoustic filter integrated casing and preparation method thereof |
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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 |