CN204571218U - For the cylindrical shape column hush tube of ventilating shaft - Google Patents
For the cylindrical shape column hush tube of ventilating shaft Download PDFInfo
- Publication number
- CN204571218U CN204571218U CN201520133927.2U CN201520133927U CN204571218U CN 204571218 U CN204571218 U CN 204571218U CN 201520133927 U CN201520133927 U CN 201520133927U CN 204571218 U CN204571218 U CN 204571218U
- Authority
- CN
- China
- Prior art keywords
- cylindrical shape
- ventilating shaft
- tube
- shape column
- 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 tubular column hush tube for ventilating shaft, 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 and form tubular column; Outer tube and interior pipe all adopt perforated plate, and its cross section is circular; 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 absorption 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, specifically a kind of cylindrical shape column hush tube for ventilating shaft.
Background technology
Known resistance noise reduction structure species is various, 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, low frequency noise reduction is poor, and in ventilating shaft, applicability is poor.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the utility model provides a kind of cylindrical shape column hush tube for ventilating shaft, 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 cylindrical shape column hush tube for ventilating shaft, the interior pipe comprising outer tube and arrange within the outer tube, and inner and outer tubes coaxially arrange formation body; Described outer tube and interior pipe all adopt perforated plate, and its cross section is circular; 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 absorption 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, a kind of cylindrical shape column hush tube for ventilating shaft has an outer tube 1 and is arranged on pipe 2 in outer tube 1, and interior pipe 2 and outer tube 1 coaxially arrange formation body; Described outer tube and interior pipe all adopt perforated plate, and its cross section is circular; Be provided with the intermediate course 3 for absorbing sound between the inner and outer pipe sections.
Intermediate course 3 is made up of acoustic window material and the sound absorption material be wrapped in acoustic window material.Acoustic window material is glass wool cloth or baffle blanket.Sound absorption material is the centrifugal super glass wool of mineral-type, mineral wool or organic fiber absorbing material.Outer tube and interior pipe carry out riveted at upper and lower side to be fixed.Described perforated plate adopts aluminium sheet, galvanized sheet or PVC board to make, and the aperture that perforated plate is bored a hole and perforated percentage are determined by theory calculate according to the requirement of noise frequency characteristic and noise reduction.
The length of body is at 1m ~ 3m, and the radius of interior pipe is at 25mm ~ 100mm, and the radius of outer tube is at 50mm ~ 200mm, and interior pipe radius is less than outer tubing radius.L in Fig. 1 is the length of body, and the radius of pipe in d representative, D represents the radius of outer tube.
The requirement of foundation sound deadening capacity and ventilation during installation, by monomer structure according to certain rule, be fixed in ventilating shaft by fixed structure, installation direction is consistent with air flow direction.
As shown in Figure 3, this is combined as continuous array combination form, during installation, each noise elimination structure is closely directly spelled and is close together, or the requirement of foundation ventilation and sound deadening capacity, by some combination of monomers together, then pass through fixed structure according to certain rule, be fixed in ventilating shaft, installation direction is consistent with air flow direction." rhombus " cavity formed in the middle of noise elimination structure and cylinder core cavity are all silencing channels, but shape is different, and acoustic characteristics is different, can widen noise elimination frequency band, the crest frequency that effectively absorption two is different, also can widen noise elimination frequency band by the thickness changing absorbent treatment.
As shown in Figure 4, this is combined as spaced array combining form, noise elimination structure spaced array can be combined during installation, or the requirement of foundation ventilation and sound deadening capacity, according to the combination of certain distance arrays, passes through fixed structure according to certain rule, be fixed in ventilating shaft, installation direction is consistent with air flow direction, by adjusting the size of spacing, regulates aerodynamic quality.
Fig. 3 and Fig. 4 is only two kinds of specific combination modes of this structure, in use, according to ventilating shaft cross-sectional sizes, noise elimination structure can be arranged in ventilating shaft according to certain rule dispersion, also can according to actual needs structure be arranged in ventilating shaft with various different combination.
Cylindrical shape column hush tube in the utility model also can be used in the ventilating duct that other air quantity is large, flow velocity is high.
Claims (7)
1. for a cylindrical shape column hush tube for ventilating shaft, it is characterized in that: the interior pipe comprising outer tube and arrange within the outer tube, inner and outer tubes coaxially arrange formation body; Described outer tube and interior pipe all adopt perforated plate, and its cross section is circular; Be provided with the intermediate course for absorbing sound between the inner and outer pipe sections.
2. the cylindrical shape column hush tube for ventilating shaft according to claim 1, is characterized in that: the length of described body is at 1m ~ 3m, and the radius of interior pipe is at 25mm ~ 100mm, and the radius of outer tube is at 50mm ~ 200mm, and interior pipe radius is less than outer tubing radius.
3. the cylindrical shape column hush tube for ventilating shaft according to claim 1, is characterized in that: described intermediate course is made up of acoustic window material and the sound absorption material be wrapped in acoustic window material.
4. the cylindrical shape column hush tube for ventilating shaft according to claim 3, is characterized in that: described acoustic window material is glass wool cloth or baffle blanket.
5. the cylindrical shape column hush tube for ventilating shaft according to claim 3, is characterized in that: described sound absorption material is the centrifugal super glass wool of mineral-type, mineral wool or organic fiber absorbing material.
6. the cylindrical shape column hush tube for ventilating shaft 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 cylindrical shape column hush tube for ventilating shaft 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 |
|---|---|---|---|
| CN201520133927.2U CN204571218U (en) | 2015-03-09 | 2015-03-09 | For the cylindrical shape column hush tube of ventilating shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520133927.2U CN204571218U (en) | 2015-03-09 | 2015-03-09 | For the cylindrical shape column hush tube of ventilating shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204571218U true CN204571218U (en) | 2015-08-19 |
Family
ID=53863877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520133927.2U Expired - Fee Related CN204571218U (en) | 2015-03-09 | 2015-03-09 | For the cylindrical shape column hush tube of ventilating shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204571218U (en) |
-
2015
- 2015-03-09 CN CN201520133927.2U patent/CN204571218U/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: 20150819 Termination date: 20170309 |