CN2685722Y - Self-operated funnel cap - Google Patents
Self-operated funnel cap Download PDFInfo
- Publication number
- CN2685722Y CN2685722Y CN 03280234 CN03280234U CN2685722Y CN 2685722 Y CN2685722 Y CN 2685722Y CN 03280234 CN03280234 CN 03280234 CN 03280234 U CN03280234 U CN 03280234U CN 2685722 Y CN2685722 Y CN 2685722Y
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- air draft
- pipe
- self
- top cover
- building
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Abstract
The utility model relates to a self-operated funnel cap installed on the top of the exhaust duct of building, mainly comprising a top cover [1], a support body [2] to support the top cover [1], a horn-shaped exhaust pipe opening [3] with small top and large bottom and a convexity [6] of a spherical cap shape protruding downwards provided at the bottom of the top cover [1]. The utility model changes the airflow pressure at different parts through changing the aperture of the airflow duct to solve the bad exhaust effect of the existing technique and the phenomenon of the downdraught of smoke or rain and snow due to the disturbance of wind. The utility model is mainly installed on the top of the exhaust duct of building to exhaust wind and guide airflow, and prevent the rain and snow and impurities falling into the exhaust duct of building.
Description
Technical field
The utility model relates to the blast cap that use at all kinds of building exhausting ducts tops such as a kind of building component of building adapted, particularly a kind of residential building.
Background technology
At present, the exhausting duct blast cap that all kinds of buildings generally use, mainly by the top cover of the rainproof usefulness of keeping out the wind and the supporter that is used to support top cover form, described supporter is fixed in building exhausting duct top, its top cover is generally tabular or pinnacle shape, supporter is generally four support posts, the normal often straight exhaust outlet of its exhaust outlet, be subject to the influence of extraneous wind-force and building exhausting duct internal resistance, cause the toxic emissions such as flue gas at its exhaust outlet place not smooth, and easily sleet takes place and flue gas pours in down a chimney phenomenon, influence exhaust effect, do not reach the purpose of air draft, ventilation.Therefore its weak point is, air draft is not smooth, easily produces sleet and flue gas pours in down a chimney phenomenon, and the exhaust ventilation effect is undesirable.
Summary of the invention
The purpose of this utility model is, overcomes the deficiencies in the prior art, and provide a kind of air draft smooth and easy, can not produce flue gas and pour in down a chimney phenomenon, the comparatively desirable self-operated type blast cap of exhaust ventilation effect.
In order to achieve the above object, the solution that the utility model is taked is, the supporter that it comprises top cover and is used for it is supported, described supporter is provided with and makes the extraneous air exhaust passage that is connected with the building exhausting duct, be characterized in, it also comprises the air draft mouth of pipe of the loudspeaker tubular that is arranged on described building exhausting duct top, the cross-sectional area of the last exhaust outlet of the described air draft mouth of pipe is less than the cross-sectional area of its air inlet, and described supporter is arranged on the top of described building exhausting duct or the wall place of the described air draft mouth of pipe.The air draft mouth of pipe of shapes such as the air draft mouth of pipe of described loudspeaker tubular can be that the transverse shape of air exhaust passage is rounded, square, rectangle, ellipse or polygon, also can be to go up exhaust outlet to be square, air inlet is the circular air draft mouth of pipe, no longer describes in detail herein.
Because the said exhaust mouth of pipe is up-small and down-big loudspeaker tubular, according to bernoulli principle in hydrodynamics and the aerodynamics and venturi siphonage, when the air-flow that enters from the bigger air inlet in the bottom of the air draft mouth of pipe arrives the last exhaust outlet place that channel cross-sectional area dwindles, air-flow velocity improves, form and discharge air-flow at a high speed, at this moment, the pressure that should go up the exhaust outlet place reduces, form pressure differential with the gas pressure in the building exhausting duct, constitute the pressure swing type air exhaust passage, formation big suction force is from bottom to top impelled flue gas upwards to discharge rapidly, and the routine from top to bottom phenomenon of irritating of flue gas can not taken place.And when top cover is dull and stereotyped or protrudes the special-shaped top cover of shape downwards, distance between its centre and the described air draft mouth of pipe centre is minimum, when then crossflow passes through, can not improve air draft mouth of pipe place air pressure, make the building exhausting duct and the air draft mouth of pipe still have big pressure differential, suction force can not reduce from bottom to top, and flue gas and air-flow blow back in the building exhausting duct under also with regard to not making progress naturally, therefore can not be subjected to the influence of extraneous wind-force.
For further its air draft effect of raising and the antijamming capability of wind-force to external world thereof, the utility model preferably also comprises a top spherical crown shape projection of protruding from described top cover bottom surface downwards, described top spherical crown shape projection is fixedly installed on the bottom surface place of described top cover, and with upper and lower being oppositely arranged of the described air draft mouth of pipe.This assembly structure makes that distance becomes littler between top cover middle part and the air draft mouth of pipe middle part, and the crossflow circulation passage is streamlined, and according to bernoulli principle, this structure both can make air draft mouth of pipe place be negative pressure state, can make the crossflow circulation smooth and easy again, and can not force flue gas to pour in down a chimney.Above-mentioned spherical crown shape projection both can be a hollow component, and promptly the dome shape parts also can be solid spherical crown shape parts.
More smooth and easy for flue gas is discharged from bottom to top, whether no matter above-mentioned spherical crown shape projection be set, preferably make the loudspeaker tubular wall of the described air draft mouth of pipe be outside protrusion arc surfaced, so that make said exhaust mouth of pipe inner chamber be streamlined, more favourable fume emission.
Installation for the ease of the said exhaust mouth of pipe, make overall structure more firm, no matter whether be provided with above-mentioned spherical crown shape projection, the utility model preferably also comprises a collet that is used to assemble the band center air draft through hole of the described air draft mouth of pipe, the cross-sectional area of the center air draft through hole of described collet is more than or equal to the cross-sectional area of described building exhausting duct, and both shapes are consistent.
Because the utility model has adopted said structure, the employing of up-small and down-big loudspeaker tubular exhaust duct mouth, make it on the top, form negative pressure in the exhaust outlet place, thereby make exhaust outlet place and building exhausting duct form pressure differential, suction force is from bottom to top given birth in natural birth, and this structure makes distance minimum between top cover and the air draft mouth of pipe middle part, crossflow pressure herein is also minimum, thereby flue gas flows backwards to make extraneous wind-force can not force herein, the setting of the spherical crown shape projection of protruding downwards, further improved its transformation air draft effect, adopt air draft mouth of pipe wall to be outside protrusion arc surfaced, and supporter is the structure of at least 2 support posts, can make fume emission more smooth and easy.Therefore, its advantage is that air draft is smooth and easy, flue gas can not pour in down a chimney, anti-extraneous wind-force interference performance is strong, and simple and compact for structure, is convenient to make.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is an A-A cutaway view of the present utility model shown in Figure 1;
Fig. 3 is the another kind of structural representation of the air draft mouth of pipe of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is further described.
In schematic diagram shown in Figure 1 and cutaway view shown in Figure 2, the utility model comprises top cover 1 and is used for its supporter that supports 2, be provided with the air exhaust passage that the external world is connected with building exhausting duct 8 at described supporter 2 places, in addition, it also comprises the air draft mouth of pipe 3 of the loudspeaker tubular that is arranged on described building exhausting duct 8 tops, the cross-sectional area of the last exhaust outlet 4 of the described air draft mouth of pipe 3 is less than the cross-sectional area of its air inlet 5, Fig. 1, among Fig. 2, the last exhaust outlet 4 of the described air draft mouth of pipe 3 is a square, air inlet 5 is circular, certainly also can adopt other shape, no longer describe in detail herein.Described supporter 2 is arranged on the top of described building exhausting duct 8.It also comprises a top spherical crown shape projection 6 of protruding downwards from described top cover 1 bottom surface in addition, and described top spherical crown shape projection 6 is fixedly installed on the place, bottom surface of described top cover 1, and with the described air draft mouth of pipe 3 upper and lower being oppositely arranged.Simultaneously it also comprises a collet 7 that is used to assemble the band center air draft through hole of the described air draft mouth of pipe 3, and the cross-sectional area of the center air draft through hole of described collet 7 is greater than the gas channel cross-sectional area of described building exhausting duct 8, and both shapes are consistent.In Fig. 1, Fig. 2, above-mentioned supporter is 4 and supports principal post.Certain above-mentioned supporter 2 also can be limited a plurality of support posts such as 2,3,5, no longer describes in detail herein.In Fig. 1, the longitudinal cross-section of the air draft mouth of pipe 3 is up-small and down-big trapezoidal shape.In schematic diagram shown in Figure 3, the loudspeaker tubular wall of the described air draft mouth of pipe 3 is outside protrusion arc surfaced.Set-up mode between above-mentioned each parts is the mode of fixedly installing, and also can adopt combination fixed connection structure, no longer describes in detail herein.
Certainly, protection domain of the present utility model is as the criterion with claims, and is not subjected to the restriction of the above-mentioned specific embodiment and each accompanying drawing.
Claims (5)
1, a kind of self-operated type blast cap, comprise top cover [1] and be used for its supporter that supports [2], described supporter [2] is provided with and makes the extraneous air exhaust passage that is connected with building exhausting duct [8], it is characterized in that, it also comprises the air draft mouth of pipe [3] of the loudspeaker tubular that is arranged on described building exhausting duct [8] top, the cross-sectional area of the last exhaust outlet [4] of the described air draft mouth of pipe [3] is less than the cross-sectional area of its air inlet [5], and described supporter [2] is arranged on the top of described building exhausting duct [8] or the wall place of the described air draft mouth of pipe [3].
2, self-operated type blast cap according to claim 1, it is characterized in that, it also comprises a top spherical crown shape projection [6] of protruding from described top cover [1] bottom surface downwards, described top spherical crown shape projection [6] permanent plant is at place, the bottom surface of described top cover [1], and with upper and lower being oppositely arranged of the described air draft mouth of pipe [3].
3, self-operated type blast cap according to claim 1 and 2 is characterized in that, the loudspeaker tubular wall of the described air draft mouth of pipe [3] is outside protrusion arc surfaced.
4, self-operated type blast cap according to claim 1 and 2, it is characterized in that, it also comprises a collet [7] that is used to assemble the band center air draft through hole of the described air draft mouth of pipe [3], the cross-sectional area of the center air draft through hole of described collet [7] is more than or equal to the gas channel cross-sectional area of described building exhausting duct [8], and both shapes are consistent.
5, self-operated type blast cap according to claim 1 is characterized in that, described supporter [2] is at least 2 support posts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03280234 CN2685722Y (en) | 2003-09-17 | 2003-09-17 | Self-operated funnel cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03280234 CN2685722Y (en) | 2003-09-17 | 2003-09-17 | Self-operated funnel cap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2685722Y true CN2685722Y (en) | 2005-03-16 |
Family
ID=34661305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03280234 Expired - Lifetime CN2685722Y (en) | 2003-09-17 | 2003-09-17 | Self-operated funnel cap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2685722Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102693928A (en) * | 2011-03-25 | 2012-09-26 | 致茂电子股份有限公司 | Non-contact type suction cup |
| CN104696976A (en) * | 2015-03-09 | 2015-06-10 | 李森昌 | Downwind cap |
| CN105485362A (en) * | 2016-01-27 | 2016-04-13 | 苏州浦灵达自动化科技有限公司 | Intelligent drive control type smoke exhaust duct cover |
| CN107023930A (en) * | 2017-04-28 | 2017-08-08 | 北京百度网讯科技有限公司 | Exhaust system applied to data center |
| CN109114578A (en) * | 2018-10-25 | 2019-01-01 | 泰山学院 | A kind of chimney cap for preventing flue gas from flowing backward and to can promote indoor and outdoor air exchange |
| CN112942733A (en) * | 2021-02-01 | 2021-06-11 | 联知(北京)技术服务有限公司 | Wind cap |
-
2003
- 2003-09-17 CN CN 03280234 patent/CN2685722Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102693928A (en) * | 2011-03-25 | 2012-09-26 | 致茂电子股份有限公司 | Non-contact type suction cup |
| CN104696976A (en) * | 2015-03-09 | 2015-06-10 | 李森昌 | Downwind cap |
| CN105485362A (en) * | 2016-01-27 | 2016-04-13 | 苏州浦灵达自动化科技有限公司 | Intelligent drive control type smoke exhaust duct cover |
| CN107023930A (en) * | 2017-04-28 | 2017-08-08 | 北京百度网讯科技有限公司 | Exhaust system applied to data center |
| CN109114578A (en) * | 2018-10-25 | 2019-01-01 | 泰山学院 | A kind of chimney cap for preventing flue gas from flowing backward and to can promote indoor and outdoor air exchange |
| CN109114578B (en) * | 2018-10-25 | 2024-02-27 | 泰山学院 | Chimney cover capable of preventing flue gas from flowing backward and promoting indoor and outdoor air exchange |
| CN112942733A (en) * | 2021-02-01 | 2021-06-11 | 联知(北京)技术服务有限公司 | Wind cap |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130917 Granted publication date: 20050316 |