CN209042427U - A kind of chimney cap for preventing flue gas from flowing backward and to can promote indoor and outdoor air exchange - Google Patents
A kind of chimney cap for preventing flue gas from flowing backward and to can promote indoor and outdoor air exchange Download PDFInfo
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- CN209042427U CN209042427U CN201821732017.6U CN201821732017U CN209042427U CN 209042427 U CN209042427 U CN 209042427U CN 201821732017 U CN201821732017 U CN 201821732017U CN 209042427 U CN209042427 U CN 209042427U
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- lower cover
- outlet body
- upper outlet
- chimney
- chimney cap
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Abstract
The utility model discloses a kind of chimney cap for preventing flue gas from flowing backward and to can promote indoor and outdoor air exchange, including upper outlet body, top cover, lower cover, support rod I and clamping element, upper outlet body is in opening up cone cell；Top cover covers upper outlet body opening；Lower cover is located at immediately below upper outlet body, and upper part is in opening up cone cell and spaced with upper outlet body, and its underpart is cylindrical in shape, top, portion integral welding；Between upper and lower cover, both ends are fixedly connected with upper and lower cover support rod I respectively；Clamping element is covered in lower cover lower part.The utility model makes under high wind conditions, and gas can be smoothly discharged in chimney, and air reverse irrigation will not occur；And in chimney when smokeless, suction function causes gas in chimney to be discharged, and forms room pressure and is less than ambient pressure, completes the indoor effect exchanged with outside air, keeps room air fresh.
Description
Technical field
The utility model belongs to fluid dynamics field, in particular to one kind prevents flue gas from flowing backward and can promote indoor outer space
The chimney cap of gas exchange.
Background technique
Northern China winter for convenience of the sustainable utilization of fuel in Fuel Furnace, allows in furnace and both without containing open fire and to keep one
Determine the habit of temperature.Northern China winter is cold, wind-force is larger, and colder and under conditions of have compared with air blast flowing, it is cold
Air can from top to bottom flow into furnace chamber under the action of suppressing by chimney, with the carbon body in furnace under the action of certain temperature
Reaction generates carbon monoxide, and due to not containing open fire, toxic gas is easy to arrange by stove outer covering to interior, causes casualties.
Meanwhile the public chimney breast depended on the inside of building also will do it air in the weather flowed compared with air blast
Flow backward, oil smoke flow is caused to enter interior, form room air pollution, people can not feel good.
Measure through test: when wind-force is less than 5 grades, traditional chimney cap can be worked normally；When wind-force is greater than 5 grades and less than 6
When grade, gas occurs to flow backward in chimney but the pressure due to flowing backward gas is less than the pressure of flue gas in chimney, flow backward after gas with
Flue gas discharge in chimney；After wind-force is greater than 6 grades, the pressure of flue gas is less than the pressure for flowing backward gas, cigarette in chimney in chimney
Gas is forced into air outlet box.
Summary of the invention
For overcome the deficiencies in the prior art, the purpose of the utility model is to provide one kind to prevent flue gas from flowing backward and can promote
The chimney cap of indoor and outdoor air exchange.
To achieve the above objectives, the technical scheme adopted by the utility model is
A kind of chimney cap for preventing flue gas from flowing backward and to can promote indoor and outdoor air exchange, including upper outlet body, top cover, lower cover
Body, support rod I and clamping element, upper outlet body are in opening up cone cell, and several edges are arranged in upper outlet body open edge；Top cover covers
Upper outlet body opening, cap edge are bonded with upper outlet body edge；Lower cover is located at immediately below upper outlet body, and upper part is in opening up
Cone cell and spaced with upper outlet body, its underpart is cylindrical in shape, top, portion integral welding；Support rod I be located at upper and lower cover it
Between, both ends are fixedly connected with upper and lower cover respectively；Clamping element is covered in lower cover lower part.
Preferably, the chimney cap further includes fixed frame and support rod II, and fixed frame is positioned horizontally in lower cover lower sleeve,
Its edge is fixedly connected with lower cover lower sleeve inner wall；Support rod II is located inside lower cover, and both ends are bored with upper outlet body respectively
Point, fixed frame center are fixedly connected.
Preferably, I upper end of support rod and upper outlet body bottom face are welded, and I lower end of support rod and lower cover top are pushed up
Face welding.
Preferably, the cap edge is bolted with upper outlet body edge.
Preferably, the clamping element is clip or the iron bar that end is threaded together.
Preferably, the fixed frame is in herringbone, and edge and lower cover lower sleeve inner wall weld.
Preferably, the upper outlet body, top cover, lower cover material be aluminium.
Preferably, the material of the support rod I, fixed frame and support rod II is iron.
Preferably, the angle of the upper outlet body, the element of cone of lower cover and bottom surface is 23-25 °.
Preferably, the number of the support rod I is 3-5 item；The number of clip is 1-3.
Preferably, the upper outlet body, the conical aperture size of lower cover are identical.
The utility model has the beneficial effect that
The utility model designs upper outlet body tapered, there are tapering space between upper and lower cover, utilizes upper outlet body and top
Lid differential seat angle causes the joining place gas of lower cover upper and lower part so that the airflow velocity by upper and lower cover interval is bigger
Stream generates suction function to gas in chimney, no matter has smokeless in chimney, gas can be smoothly discharged in chimney, will not occur
Air under high wind conditions flows backward；And in chimney when smokeless, suction function causes gas in chimney to be discharged, and forms room pressure
Less than ambient pressure, ambient atmos will be entered the room along the gap in house, is reached and be can promote the indoor and external world without windowing
The effect of air exchange keeps room air fresh, conducive to the health of people.It is upper equal in reverse-filling and indoor and outdoor air exchange
It does not need artificially to control, it is automatic to carry out, save worry laborsaving.
Detailed description of the invention
The following drawings is only intended to make the utility model schematical description and interpretation, however it is not limited to the utility model
Range.Wherein,
Fig. 1 is the structure sectional view of one chimney cap of the utility model embodiment；
Fig. 2 is high wind, flue gas passes through the distinguished and admirable of one chimney cap of the utility model embodiment and moves towards schematic diagram；
Fig. 3 is the structure sectional view of two chimney cap of the utility model embodiment；
Fig. 4 is the fixed frame and lower cover structure connection figure of the utility model embodiment two.
Appended drawing reference:
1. upper outlet body, the edge 1-1.；
2. top cover；
3. lower cover；
4. support rod I；
5. support rod II；
6. fixed frame；
7. clip；
8. high wind, 8-1. plunders cover high wind, and 8-2. crosses cover high wind；
9. flue gas；
10-1. enters the wind area, the wind outlet area 10-2..
Specific embodiment
The relevant technologies content that do not address below can be used or use for reference the prior art.
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
The application protection all should belong in technical staff's every other embodiment obtained without making creative work
Range.
Embodiment one:
As shown in Figure 1, a kind of chimney cap for preventing flue gas from flowing backward and to can promote indoor and outdoor air exchange, including upper outlet body 1,
Top cover 2, lower cover 3, support rod I 4 and clip 7, upper outlet body 1 is in opening up coniform, if 1 open edge of upper outlet body is arranged
Dry edge 1-1；Top cover 2 covers the opening of upper outlet body 1, and 2 edge of top cover and 1 edge 1-1 of upper outlet body are bolted and are fitted in one
It rises；Lower cover 3 is located at immediately below upper outlet body 1, upper part in opening up coniform and spaced with upper outlet body 1, under
Portion is cylindrical, and top, lower weld are integral；Support rod I 4 between upper and lower cover, both ends respectively with upper outlet body 1
Bottom face, the welding of lower cover upper top, the number of support rod I 4 are 3-5 item；7 sets of clip in 3 lower part of lower cover, clip 7
Number be 1-3, the present embodiment is 1, and the upper outlet body 1, top cover 2, lower cover 3 are made of flake aluminum, support rod I 4
Material be iron, the angle of upper outlet body 1, the element of cone of lower cover 3 and bottom surface is 23-25 °, upper outlet body 1, lower cover 3
Conical aperture size is identical.
Distinguished and admirable trend Jing Guo the present embodiment chimney cap of high wind 8, flue gas 9 as shown in Fig. 2, the working principle of the chimney cap such as
Under:
The cylindric lower part of the lower cover 3 of the chimney cap is covered and is commonly being adjusted without cover chimney top according to the thickness of chimney
The tightness of whole clip 7 enables 3 lower part of lower cover to be fixedly attached to chimney top, when blow carry out high wind 8 when, high wind 8 pass through
The chimney cap is crossed, the high wind for whipping top cover 2 will to be flowed through and being known as plunderring cover high wind 8-1, upper outlet body 1, lower cover will be flowed through convenient for narration
The high wind that body 3 is spaced was known as cover high wind 8-2, and upper outlet body 1,3 tapering space of lower cover are divided into two parts, windward side half cone
Shape interval is known as entering the wind area 10-1, and leeward side half-cone interval is known as wind outlet area 10-2.By upper outlet body 1, the shadow of 2 differential seat angle of top cover
It rings, high wind 8 is forced to be divided into two parts in windward side, plunders cover high wind 8-1 and whip top cover 2；It crosses cover high wind 8-2 and flows into air inlet area
10-1 is discharged through wind outlet area 10-2 again.
It is known that according to Bernoulli equation to air line density experiment is carried out with coloured air-flow when, when air-flow is logical
When crossing non-blacked face, air-flow is observed in non-blacked face section direction, can be clearly seen that and pass through non-resistance with coloured air-flow
Time when section upper and lower surface is identical.If the surface area of the upper and lower surface in the non-blacked face of fluid is different, the biggish side of area
Air-flow is larger by speed, and it is lower to will lead to the side air pressure.
Equally, it will therefore be readily appreciated that 1 bottom surface of upper outlet body product is greater than 2 top surface area of top cover, then crosses the flow velocity of cover high wind 8-2
Greater than the flow velocity for plunderring cover high wind 8-1, cause air inlet area 10-1, the wind outlet area side 10-2 air pressure relatively low, 3 upper and lower part of lower cover
Joining place air-flow can generate suction function to gas in chimney, if there is fuel combustion in flue gas 9(Fuel Furnace in chimney) when, flue gas
The joining place for rising inflow 3 upper and lower part of lower cover under the suction function is arranged with cover high wind 8-2 excessively through wind outlet area 10-2 again
Out, the wind-force of high wind 8 is bigger, and this suction function is just stronger, is not in that flue gas 9 flows backward, is conducive to flue gas 9 and smoothly rises discharge
Chimney；If in chimney when smokeless (fuel does not burn in Fuel Furnace), gas also rises under the suction function and flows into chimney
The joining place of 3 upper and lower part of lower cover is discharged with cover high wind 8-2 excessively through wind outlet area 10-2 again, and the wind-force of high wind 8 is bigger, this
Suction function is just stronger, and since the discharge of gas in chimney is so that room pressure is less than ambient pressure, ambient atmos will be along room
The gap (crack between a door and its frame, window crack or other structures slit) in room enters the room, and achievees the purpose that exhausting is ventilated, keeps room air new
It is fresh.
When the wind-force scraped is smaller, the reverse irrigation of flue gas 9 will not be occurred by having in chimney when flue gas 9, in chimney when smokeless,
Flow through air inlet area 10-1, the external wind of wind outlet area 10-2 still can still reach rush to gas generation suction function in chimney
The effect exchanged into interior with outside air, only acts on smaller.
Embodiment two:
As shown in Figure 3,4, the chimney cap of the embodiment is that one chimney cover structure external reinforcement of embodiment determines frame 6 and support rod II
5.The material of fixed frame 6 and support rod II 5 is iron.Wherein, fixed frame 6 is in herringbone, can also be cross or M shape, fix
Frame 6 is positioned horizontally in 3 lower sleeve of lower cover, and edge and 3 lower sleeve inner wall of lower cover weld；Support rod II 5 is located at lower cover 3
Inside, both ends are fixedly connected with 1 cone of upper outlet body, 6 center of fixed frame respectively.This embodiment increases fixed frames 6 and support
Bar II 5 can enhance the wind loading rating of chimney cap so that the upper and lower cover connection of chimney cap is stronger.The chimney cap of the embodiment
Working principle is as in the first embodiment, details are not described herein.
In addition, the clip 7 of above-mentioned two embodiment can be substituted by clamping elements such as iron bars that end is threaded together；It is described
Upper outlet body 1, the 3 top side of may be designed as cone cell of lower cover, 3 lower part of lower cover may be designed as square tube shape.
The upper outlet body 1, top cover 2, lower cover 3 of above-described embodiment two are also made of flake aluminum, and the material of support rod I 4 is
Iron, fixed frame 6 and II 5 material of support rod are iron.
The utility model is using upper outlet body 1 and 2 differential seat angle of top cover, so that passing through the airflow velocity ratio at upper and lower cover interval
It is larger, cause the joining place air-flow of 3 upper and lower part of lower cover to generate suction function to gas in chimney, no matter in chimney whether there is or not
Flue gas, gas can be smoothly discharged in chimney, and the air that will not occur under high wind conditions flows backward；And in chimney when smokeless, bear
Pressure effect causes in chimney gas to be discharged, and forms room pressure and is less than ambient pressure, ambient atmos by along the gap in house into
Enter interior, achievees the effect that can promote interior without windowing exchanges with outside air, keeps room air fresh.
Claims (10)
1. a kind of chimney cap for preventing flue gas from flowing backward and to can promote indoor and outdoor air exchange, it is characterised in that: including
Upper outlet body (1), in opening up cone cell, several edges (1-1) are arranged in open edge；
Top cover (2) covers upper outlet body (1) opening, and edge is bonded with upper outlet body (1) edge (1-1)；
Lower cover (3) is located at immediately below upper outlet body (1), upper part in opening up cone cell and with upper outlet body (1) there are
Every its underpart is cylindrical in shape, top, portion integral welding；
Support rod I (4), between upper and lower cover, both ends are fixedly connected with upper and lower cover respectively；And
Clamping element is covered in lower cover (3) lower part.
2. chimney cap according to claim 1, it is characterised in that: it further includes
Fixed frame (6) is positioned horizontally in lower cover (3) lower sleeve, and edge is fixedly connected with lower cover (3) lower sleeve inner wall；
And
Support rod II (5) is located at lower cover (3) inside, and both ends are fixed with upper outlet body (1) cone, fixed frame (6) center respectively
Connection.
3. chimney cap according to claim 1, it is characterised in that: the upper outlet body (1), lower cover (3) element of cone
Angle with bottom surface is 23-25 °.
4. chimney cap according to claim 1, it is characterised in that: the upper outlet body (1), lower cover (3) conical aperture
Size is identical.
5. chimney cap according to claim 1, it is characterised in that: support rod I (4) upper end and upper outlet body (1) lower part
Bottom surface welding, support rod I (4) lower end and lower cover (3) upper top are welded.
6. chimney cap according to claim 1, it is characterised in that: top cover (2) edge and upper outlet body (1) edge (1-
1) it is bolted.
7. chimney cap according to claim 1, it is characterised in that: the clamping element is that clip (7) or end are threaded together
Iron bar.
8. chimney cap according to claim 2, it is characterised in that: the fixed frame (6) is in herringbone, edge and lower cover
The welding of body (3) lower sleeve inner wall.
9. chimney cap according to claim 1, it is characterised in that: the upper outlet body (1), top cover (2), lower cover (3)
Material is aluminium, and the material of support rod I (4) is iron.
10. chimney cap according to claim 2, it is characterised in that: the material of fixed frame (6) and support rod II (5)
For iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821732017.6U CN209042427U (en) | 2018-10-25 | 2018-10-25 | A kind of chimney cap for preventing flue gas from flowing backward and to can promote indoor and outdoor air exchange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821732017.6U CN209042427U (en) | 2018-10-25 | 2018-10-25 | A kind of chimney cap for preventing flue gas from flowing backward and to can promote indoor and outdoor air exchange |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209042427U true CN209042427U (en) | 2019-06-28 |
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ID=67039185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821732017.6U Active CN209042427U (en) | 2018-10-25 | 2018-10-25 | A kind of chimney cap for preventing flue gas from flowing backward and to can promote indoor and outdoor air exchange |
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| CN (1) | CN209042427U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2018
- 2018-10-25 CN CN201821732017.6U patent/CN209042427U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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