CN203560172U - Low-noise muffling casing of mine flame-proof press-in-type contra-rotating axial-flow local fan - Google Patents
Low-noise muffling casing of mine flame-proof press-in-type contra-rotating axial-flow local fan Download PDFInfo
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- CN203560172U CN203560172U CN201320772249.5U CN201320772249U CN203560172U CN 203560172 U CN203560172 U CN 203560172U CN 201320772249 U CN201320772249 U CN 201320772249U CN 203560172 U CN203560172 U CN 203560172U
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- casing
- muffling
- silencing cotton
- end ring
- noise
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Abstract
The utility model discloses a low-noise muffling casing of a mine flame-proof press-in-type contra-rotating axial-flow local fan, solving the problems that existing devices are high in noise and not easy to maintain and replace. The low-noise muffling casing is characterized in that muffling cotton press blocks are orderly arrayed on the inner wall of the casing, are formed by pressing of fiberglass cotton by a machine and are cut according to length and diameter dimensions of air funnels and a diffuser; the muffling cotton press blocks are fixed at two ends of each air funnel and at two ends of the diffuser through end rings and end-ring supports respectively; middle rings are arranged in the middles of the muffling cotton press blocks, and the muffling cotton press blocks are further fixed by middle-ring fixing plates. The muffling cotton press blocks of the low-noise muffling casing are good in sound absorption characteristic and convenient to demount, maintain and replace, cost is saved, production cycle of the fan is shortened, and service life of the fan is prolonged; muffling effect of the casing is greatly improved, and noise is reduced by 3-5 decibels based on an original fan.
Description
Technical field
The utility model relates to a kind of casing of explosion-proof type press in type disrotatory axial flow local ventilating fan for mine, relates to or rather a kind of casing of explosion-proof type press in type disrotatory axial flow local ventilating fan for mine low noise.
Background technique
Under coal mine, driving face is mainly to realize ventilation by explosion-proof type press in type disrotatory axial flow local ventilating fan for mine at present, and its Main Function is exactly dilution and the toxic and harmful of getting rid of driving face, supplies with driving face fresh air.
Mostly the mode that this series ventilator reduces noise be to insert quieter material between casing and porous slab, reduces noise, and casing and porous slab weld together, and after going wrong, is difficult for carrying out maintain and replace; And colliery subsurface environment is severe, steam is large, dust is many, uses for a long time after blower fan, easily stop up the hole of porous slab, formed simple Wind cylinder structure, can not play the effect of noise reduction, this just greatly reduces erasure effect, can not meet the related request that coal mine downhole safety is produced.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art a kind of explosion-proof type press in type disrotatory axial flow local ventilating fan for mine low noise noise reduction casing is provided, can overcome the rugged environment that down-hole steam is large, dust is many, on the basis of former blower fan, reduce by 3～5 decibels of noises.
The utility model comprises the casing of one-level air duct, secondary air duct, diffuser, it is characterized in that: silencing cotton briquetting is fitly arranged on casing inner wall, described silencing cotton briquetting is formed by machine pressing by glass fibre cotton, according to the length of air duct, diffuser, diameter dimension, cut, outside is coated stainless steel mesh;
Air duct, diffuser for two ends end ring, end ring bearing silencing cotton briquetting is fixed, described end ring is circular, has 4-8 end ring hole, end ring bearing (6) is 4-8, L-type; End ring bearing is arranged between silencing cotton briquetting discontinuously, and one end of long slab is welded on casing inner wall, on one side short slab has end ring fixed hole, end ring passes fixed hole by screw and connects end ring bearing;
At the middle part of air duct, diffuser, be provided with central ring, central ring fixed plate is fixed silencing cotton briquetting again, described central ring fixed plate is 4-8, end, one end has arc groove, be evenly arranged between silencing cotton briquetting, one end without arc groove is welded on casing inner wall, and central ring is embedded on the arc groove of central ring fixed plate.
Described silencing cotton briquetting thickness is 55-60mm, wide 170mm-190mm, and density is 58-62Kg/m
3.
Described silencing cotton briquetting thickness is 57mm, wide 180mm, and density is 60Kg/m
3.
It is because fibrous inside is fluffy staggered that the glass fibre that the utility model is used can absorb sound, there are a large amount of small holes, micro-pore and the hole with a large amount of inside and outside connections, it is typical porous sound-absorbing material, there are good sound absorption characteristics, when sound wave incides on high-quality glass fibre cotton, sound wave energy enters material internal along hole, causes the vibration of air molecule in space.
Technique scheme is known, the utlity model has following beneficial effect: the silencing cotton briquetting of selecting consists of high-quality glass fibre cotton, has good sound absorption characteristics, easily maintenance, replacing; Adopt end ring to compress silencing cotton briquetting, be screwed on end ring bearing, centre is fixed silencing cotton briquetting again with central ring, central ring fixed plate, for convenience detach, maintain and replace, and saving cost, has shortened manufacture cycle of blower fan, the working life that has increased blower fan; The erasure effect of casing is greatly improved, and noise reduces by 3～5 decibels on the basis of former blower fan.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the A-A direction sectional view of Fig. 1.
Fig. 3 is the B-B direction sectional view of Fig. 1.
Fig. 4 is the plan view of the utility model end ring.
Fig. 5 is the plan view of the utility model end ring.
Fig. 6 is the right elevation of the utility model end ring.
Fig. 7 is the plan view of the utility model central ring.
Fig. 8 is the plan view of the utility model central ring.
Fig. 9 is the structural representation of the utility model end ring bearing.
Figure 10 is the structural representation of the utility model central ring fixed plate.
In figure, 1. casing, 2. silencing cotton briquetting, 3. end ring, 4. screw, 5. central ring, 6. end ring bearing, 7. central ring fixed plate;
31. end ring holes; 61. short slabs, 62. long slabs, 63. fixed holes, 71. arc grooves.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1, the utility model comprises casing 1, silencing cotton briquetting 2, end ring 3, central ring 5 of one-level air duct, secondary air duct, diffuser etc.Silencing cotton briquetting 2 is fitly arranged on the inwall of casing 1.
Described silencing cotton briquetting 2 is formed by machine pressing by glass fibre cotton, and outside is coated stainless steel mesh
,and use plastic latch fastening; Thickness is 55-60mm, wide 170mm-190mm, and density is 58-62Kg/m
3, length is cut according to the size of air duct, diffuser.Such as, for FBD № 6.3/2 * 30 (S) type blower fan, the length of one-level air duct, secondary air duct, diffuser is respectively 835mm, 700mm, 530mm, approximately needs 15.
As shown in Figure 3, at air duct, for diffuser two ends, end ring 3,6 pairs of silencing cotton briquettings 2 of end ring bearing are fixed.As shown in Figure 4,5, 6, end ring 3 is circular, has 4-8 end ring hole 31, is generally 6, is convenient to be fixed on end ring bearing 6 with screw 4.As shown in Figure 9, described end ring bearing is 4-8, L-type, is evenly arranged on casing 1 inwall, between silencing cotton briquetting 2, and short slab 61, long slab 62 link together, and one end of long slab 62 is welded on casing 1 inwall, Yi Bian short slab 61 has fixed hole 63.End ring 3 connects end ring bearing 6 by screw 4 through fixed hole 63.
As shown in Figure 2, at the middle part of air duct, diffuser, being provided with central ring 5, central ring fixed plate 7 fixes silencing cotton briquetting 1 again.As shown in Figure 7,8, central ring 5 is also circular, similar with end ring 3, just there is no perforate.As shown in figure 10, described central ring fixed plate 7 is 4-8, straight plate, and end, one end has arc groove 71, is evenly arranged on casing inner wall, between silencing cotton briquetting 2, without one end of arc groove 71, is welded on casing 1 inwall.Central ring 5 is embedded on the arc groove 71 of central ring fixed plate 7.
The Data Comparison of noise:
test data before improvement
test data after improvement
From above-mentioned two tables, noise can reduce by 3～5 decibels on the basis of original blower fan.
Claims (2)
1. an explosion-proof type press in type disrotatory axial flow local ventilating fan for mine low noise noise reduction casing, the casing that comprises one-level air duct, secondary air duct, diffuser, it is characterized in that: silencing cotton briquetting (2) is fitly arranged on casing (1) inwall, described silencing cotton briquetting (2) is formed by machine pressing by glass fibre cotton, according to the length of air duct, diffuser, diameter dimension, cut, outside is coated stainless steel mesh;
Air duct, diffuser for two ends end ring (3), end ring bearing (6) silencing cotton briquetting (2) is fixed, described end ring (3) is circular, have 4-8 end ring hole (31), end ring bearing (6) is 4-8, L-type; End ring bearing (6) is arranged between silencing cotton briquetting (2) discontinuously, one end of long slab (62) is welded on casing (1) inwall, short slab (61) has fixed hole (63) on one side, and end ring (3) connects end ring bearing (6) by screw (4) through fixed hole (63);
At the middle part of air duct, diffuser, be provided with central ring (5), central ring fixed plate (7) again fixing to silencing cotton briquetting (2), described central ring fixed plate (7) is 4-8, end, one end has arc groove (71), be evenly arranged between silencing cotton briquetting (2), one end without arc groove (2) is welded on casing (1) inwall, and central ring (5) is embedded on the arc groove (71) of central ring fixed plate (7).
2. explosion-proof type press in type disrotatory axial flow local ventilating fan for mine low noise noise reduction casing as claimed in claim 1, is characterized in that: described silencing cotton briquetting (2) thickness is 55-60mm, wide 170mm-190mm, and density is 58-62Kg/m
3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320772249.5U CN203560172U (en) | 2013-11-29 | 2013-11-29 | Low-noise muffling casing of mine flame-proof press-in-type contra-rotating axial-flow local fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320772249.5U CN203560172U (en) | 2013-11-29 | 2013-11-29 | Low-noise muffling casing of mine flame-proof press-in-type contra-rotating axial-flow local fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203560172U true CN203560172U (en) | 2014-04-23 |
Family
ID=50509895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320772249.5U Withdrawn - After Issue CN203560172U (en) | 2013-11-29 | 2013-11-29 | Low-noise muffling casing of mine flame-proof press-in-type contra-rotating axial-flow local fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203560172U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629163A (en) * | 2013-11-29 | 2014-03-12 | 淮北兴海工贸有限责任公司 | Low-noise sound attenuation machine shell of mine explosive-proof press-in type counter-rotating axial flow local ventilator |
-
2013
- 2013-11-29 CN CN201320772249.5U patent/CN203560172U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629163A (en) * | 2013-11-29 | 2014-03-12 | 淮北兴海工贸有限责任公司 | Low-noise sound attenuation machine shell of mine explosive-proof press-in type counter-rotating axial flow local ventilator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140423 Effective date of abandoning: 20150415 |
|
| RGAV | Abandon patent right to avoid regrant |