CN204176884U - Cornue shape column hush tube - Google Patents
Cornue shape column hush tube Download PDFInfo
- Publication number
- CN204176884U CN204176884U CN201420614564.XU CN201420614564U CN204176884U CN 204176884 U CN204176884 U CN 204176884U CN 201420614564 U CN201420614564 U CN 201420614564U CN 204176884 U CN204176884 U CN 204176884U
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- CN
- China
- Prior art keywords
- shape column
- outer tube
- sound
- hush tube
- interior pipe
- 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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Abstract
The utility model discloses a kind of cornue shape column hush tube, relate to a kind of silencing apparatus.The interior pipe that the utility model has an outer tube and arranges within the outer tube, inner and outer tubes coaxially arrange formation body, the equal opening in two ends of inner and outer tubes; Outer tube and interior pipe all adopt perforated plate, and its cross section is equilateral triangle; Be provided with the intermediate course for absorbing sound between the inner and outer pipe sections.Advantage: hush tube ectonexine is perforated plate, all effectively can be absorbed by sound-absorbing material by the sound wave of structure ectonexine, and sound deadening capacity increases by 10 ~ 20%, and noise elimination frequency band is widened, and low frequency sound deadening capacity increases, and aerodynamic quality is improved.
Description
Technical field
The utility model relates to a kind of silencing apparatus, and specifically a kind of cornue shape column hush tube, is mainly used in colliery, mine, central air-conditioning, air compressor house, in the large-scale ventilating system such as wind tunnel test.
Background technology
Known resistance noise reduction structure species is various, and as straight pipe type, chip, folded plate type, acoustic streaming formula etc., the common defects of these noise elimination structures is: passage section hour drag losses is large, and when passage section is large, high frequency lost efficacy obviously, and low frequency noise reduction is poor.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the utility model provides a kind of cornue shape column hush tube, widens noise elimination frequency band, increases low frequency sound deadening capacity, improves aerodynamic quality.
The utility model realizes with following technical scheme: a kind of cornue shape column hush tube, the interior pipe comprising outer tube and arrange within the outer tube, and inner and outer tubes coaxially arrange formation body, the equal opening in two ends of inner and outer tubes; Described outer tube and interior pipe all adopt perforated plate, and its cross section is equilateral triangle; Be provided with the intermediate course for absorbing sound between the inner and outer pipe sections.
The beneficial effects of the utility model are: because structure ectonexine is perforated plate, all effectively can be absorbed by sound-absorbing material by the sound wave of structure ectonexine, and sound deadening capacity increases by 10 ~ 20%, and noise elimination frequency band is widened, and low frequency sound deadening capacity increases, and aerodynamic quality is improved.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is perspective cross section schematic diagram of the present utility model;
Fig. 3 is a kind of using state schematic diagram of the present utility model;
Fig. 4 is another kind of using state schematic diagram of the present utility model.
In figure: 1, outer tube, 2, interior pipe, 3, intermediate course.
Detailed description of the invention
As depicted in figs. 1 and 2, the interior pipe 2 that a kind of cornue shape column hush tube has an outer tube 1 and is arranged in outer tube 1, interior pipe 2 and outer tube 1 coaxially arrange formation body, the equal opening in two ends of inner and outer tubes; Described outer tube and interior pipe all adopt perforated plate, and its cross section is equilateral triangle; Be provided with the intermediate course 3 for absorbing sound between the inner and outer pipe sections.
Wherein, intermediate course is made up of acoustic window material and the sound-absorbing material be wrapped in acoustic window material.Acoustic window material is glass wool cloth or baffle blanket.Sound-absorbing material is the centrifugal super glass wool of mineral-type or mineral wool or organic fiber absorbing material.Outer tube and interior pipe carry out riveted at upper and lower side to be fixed.Perforated plate adopts aluminium sheet, galvanized sheet or PVC board to make, and the aperture that perforated plate is bored a hole and punching rate are determined by theory calculate according to the requirement of noise frequency characteristic and noise reduction, according to square or triangle manner spread configuration.
The cross section of outer tube and interior pipe is equilateral triangle, and the length of body is at 1m ~ 3m, and the width of outer tube is at 0.3m ~ 0.5m, and the distance between interior pipe and outer tube is at 0.05m ~ 0.25m.L in Fig. 1 is the length of body, A and B represents the width of outer tube, C and D is the distance between outer tube and interior pipe.During absorbing high-frequency sound, C and D gets low value, and when absorbing all-bottom sound, C and D gets high level, for the specific requirement of sound deadening capacity and frequency of noise elimination peak value, can combine single hush tube during use.
The requirement of foundation sound deadening capacity and ventilation during installation, by monomer structure according to certain rule, be fixed in silencing channel by fixed structure, installation direction is consistent with air flow direction.
As shown in Figure 3, monomer hush tube is according to combining back-to-back, directly spell during installation and be close together, or the requirement of foundation ventilation and sound deadening capacity, some monomers are combined back-to-back, according to certain rule by fixed structure, be fixed in silencing channel, installation direction is consistent with air flow direction.The mounting means combined back-to-back, middle adjacent wall is close together, and anechoic sheet thickness doubles, and the first resonant frequency about reduces an octave, is conducive to Low Frequency Sound Absorption, and peripheral wall is still the monomer thickness of structure.This structure effectively can absorb two different frequency peak.
As shown in Figure 4, monomer hush tube is by the combination of diagonal angle, angle, directly can spell during installation and be close together, or the requirement of foundation ventilation and sound deadening capacity, diagonal angle, some monomer angles is combined, according to certain rule by fixed structure, be fixed in silencing channel, installation direction is consistent with air flow direction.Angle diagonal form, can make full use of the two-sided absorption function efficient absorption acoustic energy of structure.
Fig. 3 and Fig. 4 is only two kinds of specific combination modes of this structure, in use, according to silencing channel actual conditions, noise elimination structure can be arranged in silencing channel according to certain rule dispersion, also can according to actual needs structure be arranged in silencing channel with various different combination.
Claims (7)
1. a cornue shape column hush tube, is characterized in that: the interior pipe comprising outer tube and arrange within the outer tube, and inner and outer tubes coaxially arrange formation body, the equal opening in two ends of inner and outer tubes; Described outer tube and interior pipe all adopt perforated plate, and its cross section is equilateral triangle; Be provided with the intermediate course for absorbing sound between the inner and outer pipe sections.
2. cornue shape column hush tube according to claim 1, is characterized in that: the length of body is at 1m ~ 3m, and the width of outer tube is at 0.3m ~ 0.5m, and the distance between interior pipe and outer tube is at 0.05m ~ 0.25m.
3. cornue shape column hush tube according to claim 1, is characterized in that: described intermediate course is made up of acoustic window material and the sound-absorbing material be wrapped in acoustic window material.
4. cornue shape column hush tube according to claim 3, is characterized in that: described acoustic window material is glass wool cloth or baffle blanket.
5. cornue shape column hush tube according to claim 3, is characterized in that: described sound-absorbing material is the centrifugal super glass wool of mineral-type or mineral wool or organic fiber absorbing material.
6. the cornue shape column hush tube according to any one of claim 1-5, is characterized in that: described outer tube and interior pipe carry out riveted at upper and lower side to be fixed.
7. the cornue shape column hush tube according to any one of claim 1-5, is characterized in that: described perforated plate adopts aluminium sheet, galvanized sheet or PVC board to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420614564.XU CN204176884U (en) | 2014-10-22 | 2014-10-22 | Cornue shape column hush tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420614564.XU CN204176884U (en) | 2014-10-22 | 2014-10-22 | Cornue shape column hush tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204176884U true CN204176884U (en) | 2015-02-25 |
Family
ID=52565692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420614564.XU Expired - Fee Related CN204176884U (en) | 2014-10-22 | 2014-10-22 | Cornue shape column hush tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204176884U (en) |
-
2014
- 2014-10-22 CN CN201420614564.XU patent/CN204176884U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150225 Termination date: 20161022 |