CN1301383C - Air-gas mixer device special for gas burner and similar device - Google Patents
Air-gas mixer device special for gas burner and similar device Download PDFInfo
- Publication number
- CN1301383C CN1301383C CNB028288459A CN02828845A CN1301383C CN 1301383 C CN1301383 C CN 1301383C CN B028288459 A CNB028288459 A CN B028288459A CN 02828845 A CN02828845 A CN 02828845A CN 1301383 C CN1301383 C CN 1301383C
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- CN
- China
- Prior art keywords
- pipeline
- mixer apparatus
- air
- tubular portion
- choke element
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- 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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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
The present invention relates to an air-gas mixing device, which is especially used in a fuel combustor with a forced ventilation device. The air-gas mixing device of the present invention comprises an air-gas mixing chamber (18), a first throttling device, an air flow steering device (9) and a second throttling device, wherein materials are fed in the air-gas mixing chamber (18) through gas flow and air flow which are respectively led in the device by a first pipeline (3) and a second pipeline (4); the first throttling device is used for regulating the second pipeline (4) so as to regulate the air flow filled in the mixing device through the second pipeline; the air flow steering device (9) is used for separating and leading the regulated air flow to form main air flow and independent and different secondary air flow; the second throttling device is connected with the secondary air flow, and thus, the secondary air flow is selectively led in the mixing chamber (18).
Description
Technical field
The present invention relates to especially a kind of but be not the air-gas mixer device that is used to have the gas burner of forced ventilation device exclusively.
Background technology
As everyone knows, the device of the above-mentioned type is used in the boiler and similar device with gas burner, is mainly used in family and uses, and particularly be used in the application with forced ventilation device.
Device with above-mentioned feature can be known from International Application PCT/IT01/00097 of the applicant.
In these devices, the ratio of combustible air-gas mixture is by axially being ejected into the interior combustion gas of air stream and being determined by the mixing subsequently of the living air fuel gas mixture of further air miscarriage.The homogenieity of the ignition mixture that can be obtained by this device also swabbing action of the fan by being arranged on the blender downstream is improved.
Summary of the invention
The objective of the invention is to improve the effective range of the adjusting of the accuracy of ratio of combustion mixture and expansion institute delivery air (and therefore obtainable power).
Another purpose is to reduce covibration, and this covibration is caused by the flame front in the burner and is to cause the device external that this device is installed therein to form the reason of noise; Usually, these phenomenons are owing to the pressure loss that must produce in order to realize flow regulating function is exaggerated.
Another purpose provides a kind of air-gas mixer device, and it compares compact more and cheap with known arrangement, but satisfies above-mentioned requirements simultaneously.
For realizing above purpose of the present invention, a kind of air-gas mixer device is provided, comprise: air-gas mixing chamber, it is by flowing feed by gas-flow in first pipeline and the second pipeline gatherer and air respectively, it is characterized in that, described device further comprises: the first throttle device is used to regulate second pipeline so that regulate the air that enters in the mixer apparatus via second pipeline and flows; The air circulation is to device, and the air flow point that is used for being conditioned is from being main air flow and independent and different inferior air stream with guiding; And second throttling arrangement, be connected in time air stream, thus optionally with inferior air conductance to mixing chamber.
Preferably, the first throttle device comprises choke element, it can move axially between the primary importance and the second place in second pipeline, wherein is that the air flow point that enters second pipeline does not define smallest cross-sectional and maximum cross-section when the primary importance and the second place.
Preferably, the part that second pipeline extends in the zone of the axial path of choke element between first and second positions at least along the direction of air stream is dispersed, thereby the choke element and second pipeline define the flow section that increases gradually to the second place from primary importance together in second pipeline.
Preferably, first and second pipelines and choke element are coaxial mutually.
Preferably, the choke element and second pipeline are at least along described section axial symmetry.
Preferably, first pipeline extends axially in second pipeline and choke element is assemblied on first pipeline slidably.
Preferably, choke element comprises the disc-shaped part that radially extends from ferrule element, and this sleeve part is connected in first pipeline slidably.
Preferably, transfer comprises tubular portion, it is arranged between first and second pipelines coaxially, be positioned at the downstream of choke element with respect to airflow direction, tubular portion limits the 3rd pipeline and the 4th pipeline, the 3rd pipeline streamwise convergence and can turn to main air flow, the 4th pipeline is communicated in second pipeline via the one or more radial openings that are arranged in the tubular portion, thereby optionally with inferior air conductance to mixing chamber.
Preferably, second throttling arrangement comprises described opening, and second pipeline is assemblied on the tubular portion at least in part to regulate opening, and second pipeline can be away from rotating with the position of closing fully towards opening on tubular portion.
Preferably, between second pipeline and tubular portion, be limited with at least one axial passage, be used to make the second and the 4th pipeline via these one or more open communication.
Preferably, this at least one passage comprises corresponding recess, and it is arranged on second side opposite, extends on the circumferential section at least of the cross section of pipeline, and extends axially in the position in the face of opening.
Preferably, be provided with two recesses that separate angledly, define corresponding axial passage corresponding to two openings, recess has certain circumferential length, makes second pipeline and tubular portion to rotate mutually between position that opening is closed fully and recess overlap fully open position on the respective openings.
Preferably, first throttle device quilt is towards the first operating position resiliency urged with minimum fuel gas flow cross section.
Preferably be provided with spring, it is assemblied on first pipeline, and have act on the tubular portion and choke element on opposed end.
Preferably, mixing chamber is arranged in the fan suction opening zone, and the delivery outlet of fan is connected in gas burner.
Description of drawings
Can know the features and advantages of the present invention more from the detailed description of following the preferred embodiments of the present invention of describing in the mode of non-limiting example with reference to accompanying drawing, wherein:
Fig. 1 is the schematic axial section that is equipped with according to the equipment of air-gas mixer device of the present invention;
Fig. 2 is the partial cross section schematic diagram along the line II-II of Fig. 1; And
Fig. 3 is the view corresponding to Fig. 1, and a kind of modification of the present invention is shown.
The specific embodiment
With reference to above-mentioned accompanying drawing, the air-gas mixer device especially for to the forced-draft burner feed constructed according to the invention is expressed as 1 generally.
Device 1 comprises tubular body 2, and this tubular body 2 comprises the cylinder blanket with X-axis line, and has two relative end 2a, 2b.Be used for first pipeline 3 of fuel gas stream introducing blender is extended coaxially with tubular body 2 in tubular body 2, between end 2a, 2b.The second axial pipeline 4 of annular cross section is limited between the tubular body 2 and first pipeline 3, is used to guide the air stream at end 2a place access to plant 1.
According to the present invention, the air-flow that enters pipeline 4 can utilize generally to be regulated with 5 choke element of representing.Element 5 can move axially between the primary importance and the second place in second pipeline along axis X, wherein when the primary importance and the second place for the air current limit that enters at end 2a place minimum ring tee section and maximum cross-section.Particularly, choke element 5 comprises cover tube-like element 6, be used for sliding on first pipeline 3, and a disc-shaped part 7 radially extends from an axial end that overlaps tube-like element 6.In the path between above-mentioned two positions of element 5, second pipeline 4 has a part 8 of dispersing along airflow direction, thereby defines the flow cross section that increases gradually to the second place from primary importance with part 7.In Fig. 1, element 5 is expressed as solid line in the primary importance of minimum cross-section, and is expressed as dotted line in the second place of maximum cross section.
Preferably, the part 8 of pipeline 4 and part 7 axial symmetries and part 8 have predetermined tapering.
At end 2b place, device 1 further comprises a tubular portion 9, and it is arranged between first and second pipelines 3,4 coaxially and is positioned at the downstream of choke element 5, referring to F among Fig. 1 represented air and fuel gas flow direction.
Advantageously, tubular portion 9 axially is connected in first pipeline and has convergent walls 10, and it defines the 3rd pipeline 11, the three pipelines 11 and have the annular cross section that extends outside pipeline.
The shell of second pipeline also has at least one recess 15, is formed on inner surface of pipeline and extends axially in the position of the downstream 13 of part 8, thereby be formed for making the passage of the second and the 4th pipeline via open communication.Cylinder blanket advantageously has the recess 15 that two circumferential lengths equate and evenly separate.Tubular body 2 also is assemblied on the tubular portion 9 at least in part, thereby can rotate so that constitute the device of regulating opening 13 around axis X with respect to part 9.More particularly, between the adjacent recesses 15 can be away from moving by the cylinder blankets part of 16 expressions with the position that overlaps fully on the opening 13 towards them, thereby close them.
The circumferential length of recess 15 is chosen as and makes opening 13 along with relatively rotating and close simultaneously or open fully between tubular body 2 and the part 9.
The radial fan 17 that is arranged on tubular body 2 downstreams along the direction of air and/or gas-flow has the suction opening 17a that extends previously at outlet end 2b, forms volume of air/gas mixture herein.Be limited with a mixing chamber 18 between fan 17 and tubular body 2, it will be more clear from following explanation by above-mentioned pipeline 3,11 and 12 feed and its operation.
In the use, mixer apparatus 1 is suitable for choke element 5 and is installed as the application with vertical-path, and promptly axis X is the application of gravity along the axis of its effect.In this case, choke element 5 be subjected to its from the gravity effect of re-correlation and the pressure effect in the pipeline 4.
Under the minimum pressure RST that minimum speed produced when air-breathing by fan 17, choke element 5 moves vertically to primary importance (solid line is represented among Fig. 1) by its deadweight effect, and wherein it is close proximity to the stopping element 19 that radially extends in pipeline 4.In this position, define the minimum cross-section of the gas-flow that enters at 2a place, the end of pipeline 4.
The increase of the pressure signal that produces along with the increase of rotation speed of the fan, the pressure drop of Chan Shenging trends towards making element 5 to move towards the second place (dotted line is represented among Fig. 1) against the gravity effect thereupon.In this position, define the maximum cross section of air stream.Between minimum and maximum position, can obtain the intermediate flow cross section by the gravity and the pressure of balanced action on choke element 5.Can regulate like this and will flow with the air that the gas-flow of sending into through pipeline 3 mixes.
Air-flow also is divided into the main air flow and time air stream of flow through respectively pipeline 11 and 12.Under maximum-flow condition (choke element 5 is in the second place), inferior air is flowed through and is imported mixing chamber 18 by opening 13 and the 4th pipeline 12.Inferior air stream also can be regulated by the outflow cross section of adjusting opening 13, for example closes opening 13 by part.
Therefore can regulate air stream at fan suction inlet place, compare with known applications and increased adjustable range.
In a modification of the present invention, as shown in Figure 3, wherein identical with previous embodiment parts are represented with identical label, choke element 5 for example urges resiliently against primary importance (having the minimal flow cross section) by the spring 20 that is assemblied on first pipeline 3, and this spring 20 has the opposed end that acts on respectively on tubular portion 9 and the element 5.This modification of the present invention can be applied in all application effectively, and element 5 can not be subjected to the application of gravity effect when for example installing owing to mixer apparatus 1 level.In this case, element 5 is subjected to along the pressure effect of axis X and the elastic force effect of spring 20, and owing to the above-mentioned equilibrium of forces that acts on the element 5 is realized flow adjustment position (comprising minimum and the maximum fluidity position).
The present invention has realized the purpose that proposes providing more than known scheme like this Advantage.
First advantage is, because the mobile adjusting that device according to the present invention is realized has Expand mobile adjustable range sharply and therefore expanded dynamic range.
Another advantage is that the maximum that realized by the adjusting according to device of the present invention flows can Further to regulate by optionally regulating time air stream.
Another advantage is to produce the pressure loss according to solar term gating element of the present invention, thereby falls Therefore resonance effect in the low device also reduces the noise phenomenon.
One of them main advantage is better axially and radially compactedness of device, and this is because use Being included in air in the device of adjusting mixer radial opening turns in the pipeline.
Claims (20)
1. air-gas mixer device comprises:
Air-gas mixing chamber (18), it by gas-flow in first pipeline (3) and second pipeline (4) gatherer and air stream feed, is characterized in that described device further comprises by respectively:
The first throttle device is used to regulate second pipeline (4) so that regulate the air that enters in the mixer apparatus via second pipeline and flows;
The air circulation is to device (9), and the air flow point that is used for being conditioned is from being main air flow and independent and different inferior air stream with guiding; And
Second throttling arrangement is connected in time air stream, thus optionally with inferior air conductance to mixing chamber (18).
2. mixer apparatus as claimed in claim 1, it is characterized in that, the first throttle device comprises choke element (5), it can move axially between the inherent primary importance of second pipeline (4) and the second place, does not wherein define smallest cross-sectional and maximum cross-section for the air flow point that enters second pipeline (4) when the primary importance and the second place.
3. mixer apparatus as claimed in claim 2, it is characterized in that, the part (8) that second pipeline (4) extends in the zone of the axial path of choke element (5) between first and second positions at least along the direction of air stream is dispersed, thereby choke element (5) and second pipeline (4) define the flow section that increases gradually to the second place from primary importance together in second pipeline.
4. mixer apparatus as claimed in claim 3 is characterized in that, first and second pipelines (3,4) and choke element (5) are coaxial mutually.
5. mixer apparatus as claimed in claim 4 is characterized in that, choke element (5) and second pipeline (4) are axially symmetrical along described part (8) at least.
6. as each described mixer apparatus in the claim 2 to 5, it is characterized in that first pipeline (3) extends axially and choke element (5) is assemblied on first pipeline (3) slidably in second pipeline (4).
7. as each described mixer apparatus in the claim 2 to 5, it is characterized in that choke element (5) comprises the disc-shaped part (7) that radially extends from ferrule element (6), this sleeve part is connected in first pipeline (3) slidably.
8. as each described mixer apparatus in the claim 1 to 5, it is characterized in that first throttle device quilt is towards the first operating position resiliency urged with minimum fuel gas flow cross section.
9. as each described mixer apparatus in the claim 1 to 5, it is characterized in that mixing chamber is arranged in the fan suction opening zone, the delivery outlet of fan is connected in gas burner.
10. as each described mixer apparatus in the claim 2 to 5, it is characterized in that, transfer comprises tubular portion (9), it is arranged on first and second pipelines (3 coaxially, 4) between, be positioned at the downstream of choke element (5) with respect to airflow direction, tubular portion (9) limits the 3rd pipeline (11) and the 4th pipeline (12), the 3rd pipeline (11) streamwise is restrained and can be turned to main air flow, the 4th pipeline (12) is communicated in second pipeline (4) via the one or more radial openings (13) that are arranged in the tubular portion (9), thus optionally with inferior air conductance to mixing chamber (18).
11. mixer apparatus as claimed in claim 10 is characterized in that, first throttle device quilt is towards the first operating position resiliency urged with minimum fuel gas flow cross section.
12. mixer apparatus as claimed in claim 11 is characterized in that, is provided with spring, it is assemblied on first pipeline, and have act on the tubular portion and choke element on opposed end.
13. mixer apparatus as claimed in claim 10 is characterized in that, mixing chamber is arranged in the fan suction opening zone, and the delivery outlet of fan is connected in gas burner.
14. mixer apparatus as claimed in claim 10, it is characterized in that, second throttling arrangement comprises described opening (13), and second pipeline (4) is assemblied in tubular portion (9) at least in part and goes up to regulate opening, and second pipeline (4) can be gone up away from rotating with the position of closing fully towards opening (13) at tubular portion (9).
15. mixer apparatus as claimed in claim 14 is characterized in that, is limited with at least one axial passage between second pipeline (4) and tubular portion (9), is used to make the second and the 4th pipeline via these one or more open communication.
16. mixer apparatus as claimed in claim 15, it is characterized in that this at least one passage comprises corresponding recess (15), it is arranged on the inner surface of second pipeline (4), on the circumferential section at least of the cross section of pipeline, extend, and extend axially in position in the face of opening (13).
17. mixer apparatus as claimed in claim 16, it is characterized in that, be provided with two recesses that separate (15) angledly, define corresponding axial passage corresponding to two openings, recess has certain circumferential length, makes second pipeline and tubular portion to rotate mutually between position that opening is closed fully and recess overlap fully open position on the respective openings.
18., it is characterized in that first throttle device quilt is towards the first operating position resiliency urged with minimum fuel gas flow cross section as each described mixer apparatus in the claim 14 to 17.
19. mixer apparatus as claimed in claim 18 is characterized in that, is provided with spring, it is assemblied on first pipeline, and have act on the tubular portion and choke element on opposed end.
20., it is characterized in that mixing chamber is arranged in the fan suction opening zone as each described mixer apparatus in the claim 14 to 17, the delivery outlet of fan is connected in gas burner.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/IT2002/000284 WO2003092875A2 (en) | 2002-04-30 | 2002-04-30 | An air-gas mixer device, particularly for gas burners and similar apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1625670A CN1625670A (en) | 2005-06-08 |
| CN1301383C true CN1301383C (en) | 2007-02-21 |
Family
ID=29287823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB028288459A Expired - Fee Related CN1301383C (en) | 2002-04-30 | 2002-04-30 | Air-gas mixer device special for gas burner and similar device |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1499428B1 (en) |
| CN (1) | CN1301383C (en) |
| AU (1) | AU2002306234B2 (en) |
| DE (1) | DE60226079D1 (en) |
| WO (1) | WO2003092875A2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101680656B (en) * | 2007-05-08 | 2012-11-14 | 斯博德累斯顿有限公司 | Combined ventilator/gas valve unit |
| DE102023207226A1 (en) | 2023-07-28 | 2025-01-30 | Robert Bosch Gesellschaft mit beschränkter Haftung | air-gas mixer, air-gas mixing unit and air-gas mixture combustion plant |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1395189B1 (en) * | 2009-07-22 | 2012-09-05 | Ln 2 Srl Socio Unico | AIR-GAS MIXER DEVICE, PARTICULARLY FOR PRE-MIXING BURNER APPLIANCES. |
| IT1402076B1 (en) * | 2010-09-02 | 2013-08-28 | Sit La Precisa Spa Con Socio Unico | AIR-GAS MIXER DEVICE FOR COMBUSTIBLE GAS BURNERS WITH PREMIXING |
| CN111699345B (en) * | 2017-12-11 | 2022-12-13 | 西特股份公司 | Device for conveying gas |
| US11441772B2 (en) | 2018-07-19 | 2022-09-13 | Brunswick Corporation | Forced-draft pre-mix burner device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2058331A (en) * | 1979-08-31 | 1981-04-08 | Elf Aquitaine | Gas burner with air injection adapted to operate within a very wide range of caloric output values |
| EP0495358A2 (en) * | 1991-01-17 | 1992-07-22 | Ruhrgas Aktiengesellschaft | Actuator for the two-stage power regulation of a gas power burner |
| CN2155497Y (en) * | 1993-04-06 | 1994-02-09 | 张泮辉 | Mixer for automatic regulating gas proportion |
| CN2237781Y (en) * | 1995-08-18 | 1996-10-16 | 王毓奎 | Multifunctional flame-change burner |
| US6164959A (en) * | 1998-12-28 | 2000-12-26 | Sit La Precisa S.P.A. | Pilot gas burner |
-
2002
- 2002-04-30 CN CNB028288459A patent/CN1301383C/en not_active Expired - Fee Related
- 2002-04-30 WO PCT/IT2002/000284 patent/WO2003092875A2/en active IP Right Grant
- 2002-04-30 AU AU2002306234A patent/AU2002306234B2/en not_active Expired - Fee Related
- 2002-04-30 DE DE60226079T patent/DE60226079D1/en not_active Expired - Lifetime
- 2002-04-30 EP EP02733230A patent/EP1499428B1/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2058331A (en) * | 1979-08-31 | 1981-04-08 | Elf Aquitaine | Gas burner with air injection adapted to operate within a very wide range of caloric output values |
| EP0495358A2 (en) * | 1991-01-17 | 1992-07-22 | Ruhrgas Aktiengesellschaft | Actuator for the two-stage power regulation of a gas power burner |
| CN2155497Y (en) * | 1993-04-06 | 1994-02-09 | 张泮辉 | Mixer for automatic regulating gas proportion |
| CN2237781Y (en) * | 1995-08-18 | 1996-10-16 | 王毓奎 | Multifunctional flame-change burner |
| US6164959A (en) * | 1998-12-28 | 2000-12-26 | Sit La Precisa S.P.A. | Pilot gas burner |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101680656B (en) * | 2007-05-08 | 2012-11-14 | 斯博德累斯顿有限公司 | Combined ventilator/gas valve unit |
| DE102023207226A1 (en) | 2023-07-28 | 2025-01-30 | Robert Bosch Gesellschaft mit beschränkter Haftung | air-gas mixer, air-gas mixing unit and air-gas mixture combustion plant |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2003092875A3 (en) | 2004-02-19 |
| AU2002306234A1 (en) | 2003-11-17 |
| CN1625670A (en) | 2005-06-08 |
| EP1499428B1 (en) | 2008-04-09 |
| DE60226079D1 (en) | 2008-05-21 |
| WO2003092875A2 (en) | 2003-11-13 |
| AU2002306234B2 (en) | 2008-03-06 |
| EP1499428A2 (en) | 2005-01-26 |
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