CN109442405A - A kind of air-fuel ratio mixer - Google Patents
A kind of air-fuel ratio mixer Download PDFInfo
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- CN109442405A CN109442405A CN201811603781.8A CN201811603781A CN109442405A CN 109442405 A CN109442405 A CN 109442405A CN 201811603781 A CN201811603781 A CN 201811603781A CN 109442405 A CN109442405 A CN 109442405A
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- differential pressure
- mixing
- plate
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- 239000000446 fuel Substances 0.000 title claims abstract description 35
- 239000000567 combustion gas Substances 0.000 claims abstract description 175
- 238000002156 mixing Methods 0.000 claims abstract description 99
- 239000008246 gaseous mixture Substances 0.000 claims abstract description 78
- 239000007789 gas Substances 0.000 claims abstract description 58
- 239000002737 fuel gas Substances 0.000 claims description 24
- 238000002485 combustion reaction Methods 0.000 claims description 16
- 241000486406 Trachea Species 0.000 claims description 13
- 210000003437 trachea Anatomy 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 abstract description 7
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000003491 array Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 239000008187 granular material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 244000248349 Citrus limon Species 0.000 description 2
- 235000005979 Citrus limon Nutrition 0.000 description 2
- 238000005474 detonation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000000505 pernicious effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- 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
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- 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
-
- 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
- F23D14/48—Nozzles
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The invention discloses a kind of air-fuel ratio mixers, combustion gas orifice plate is set in the gas pipeline in air-fuel ratio mixer, setting mixing spiracular plate and blower in air pipeline, stomata or throttle orifice are set on combustion gas orifice plate and mixing spiracular plate, making combustion gas and air, flow velocity increases after combustion gas orifice plate and mixing spiracular plate respectively, pressure reduction, to generate differential pressure in combustion gas orifice plate and mixing spiracular plate two sides respectively, the combustion gas differential pressure △ PG of combustion gas orifice plate two sides and the gaseous mixture differential pressure △ P of mixing spiracular plate two sides are measured by setting differential pressure proportioning valve, and gaseous mixture differential pressure △ P makes differential pressure proportioning valve be in equilibrium state with the sum of spring differential pressure △ a Shi Caihui equal with combustion gas differential pressure △ PG, when gaseous mixture differential pressure △ P changes, differential pressure proportioning valve meeting automatic adjustment of combustion gas flow, guarantee that gas flow and mixed gas flow are kept Certain quantitative value relationship meets high-power lower combustion gas uniform and stable air-fuel mixture requirement in burner.
Description
Technical field
The present invention relates to fuel gas combustion equipment fields, and in particular to a kind of air-fuel ratio mixer.
Background technique
In gas burner and fuel burner nozzle technical field, stable burning need suitable air, combustion gas it is uniform
Mixing, can just be greatly lowered nitrogen oxides, reach the discharge standard of national regulation.To obtain uniform gaseous mixture, usually
Using means such as sieves；To obtain the stable gaseous mixture of ratio, using means such as venturi, pressure-type proportioning valves.Venturi is used
It is more in small-power burner, in powerful burner and it is not suitable for, and pressure-type proportioning valve is linearly not so good.
The patent of Publication No. CN206904977U discloses a kind of adjusting stability of flow and accurate combustion gas passes through adjusting
Device, when exhaust fan works, wind enters from blast pipe, and combustion gas passes through from gas inlet control valve group, Self-operated differential pressure regulaitng valve
Into blast pipe, combustion gas, which mixes with air, is sent into combustion chamber by exhaust fan together, and combustion gas is electronic from gas inlet control valve group
Switch valve controls the on-off of gas circulation, electric gas flow proportional regulating valve controls combustion gas stream flux；The work function of exhaust fan
Rate is bigger, and the air inlet flow of blast pipe is bigger, and wind pressure also becomes larger therewith, on the contrary, smaller；At the negative tube being connect with blast pipe
It can bigger, the combustion gas because of the aperture of the bigger opening of negative pressure in the flow control pressure sensitive film in negative pressure state, Self-operated differential pressure regulaitng valve
Flow passes through more (i.e. negative pressure is bigger, and air is bigger by flow, and required combustion gas is also more could be directly proportional), self-operated type pressure
Flow control pressure sensitive film in the differential regulating valve dynamic change aperture with vacuum magnitude.
The patent adjusts combustion by incuding the negative pressure for the negative tube connecting with blast pipe by Self-operated differential pressure regulaitng valve
Whether the flow of gas, the pressure for being unable to measure combustion gas and the mixed gaseous mixture of air can reach stable combustion standard,
It can not be by measuring the pressure of gaseous mixture come the flow of regulating gas.
Summary of the invention
In order to solve the above-mentioned technical problem, the object of the present invention is to provide a kind of air-fuel ratio mixers, poor by being arranged
Proportioning valve automatic adjustment of combustion gas flow is pressed, guarantees that gas flow and mixed gas flow keep certain quantitative value relationship, is met big
Combustion gas uniform and stable air-fuel mixture requirement in burner under power.
For achieving the above object, the technical solution adopted by the present invention is as follows:
A kind of air-fuel ratio mixer, including gas pipeline, air pipeline, proportioning valve and fuel burner nozzle, the fuel gas conduit
The outlet side in road connects the air pipeline, and the proportioning valve is connected to the inlet end of the gas pipeline, the air pipeline
Outlet side connect fuel burner nozzle.
Combustion gas orifice plate is set in the gas pipeline, and setting mixing spiracular plate and blower in the air pipeline are described mixed
It closes spiracular plate to be positioned close on the inside of the outlet side of the air pipeline, the blower setting is in the mixing spiracular plate and described
Between the inlet end of air pipeline, the position that the outlet side of the gas pipeline is connect with the air pipeline is located at the air
Between the inlet end of pipeline and the blower；
The proportioning valve is differential pressure proportioning valve, and two combustion gas pressure tracheaes and two mixing are arranged on the differential pressure proportioning valve
Combustion gas pressure point is arranged in gas pressure tracheae, the two sides of the combustion gas orifice plate, and the two sides setting gaseous mixture of the mixing spiracular plate takes
Pressure point, one end of two combustion gas pressure tracheaes are connected on the combustion gas pressure point of combustion gas orifice plate two sides,
One end of two gaseous mixture pressure tracheaes is connected on the gaseous mixture pressure point of the mixing spiracular plate two sides.
Preferably, two combustion gas pressure tracheaes cooperate the differential pressure proportioning valve to measure the combustions of combustion gas orifice plate two sides
Gas differential pressure △ PG, two gaseous mixture pressure tracheaes cooperate the differential pressure proportioning valve to measure the mixed of the mixing spiracular plate two sides
Close gas differential pressure △ P.
Preferably, balance regulator and guide rod device be set on the differential pressure proportioning valve, the balance regulator and
Spring and the first tabletting, the lower end company of the upper end of the spring and the balance regulator are set between the guide rod device
It connects, the lower end of the spring is connect with first tabletting, upper end setting and the screwdriver cooperation of the balance regulator
Groove adjusts the height and position of the balance regulator by the screwdriver.
Preferably, primary diaphragm is fixed in first tabletting, the both ends of the primary diaphragm are resisted against the differential pressure ratio
On the inner wall of example valve, differential pressure proportioning valve is divided into two chambers up and down by primary diaphragm, and the primary diaphragm includes by-level
Section and the bending segment positioned at by-level section two sides, the spring are connect with the upper surface central point of first tabletting,
The spring acts in the first tabletting, and the spring is spring differential pressure △ a, the △ to the pressure that first tabletting generates
PG=△ P+ △ a.The upper end of the balance regulator is vertically set in the differential pressure proportioning valve, and balance regulator
Upper end is connected through a screw thread with the differential pressure proportioning valve, and adjusting screw knife can be screwed into balance regulator or lemon goes out, thus
The spring and the first tabletting are driven makes spring and the first tabletting reach the spring pressure of corresponding power burner to corresponding position
Dynamic balance point guarantees △ PG=△ P+ △ a.If △ PG ≠ △ P+ △ a, differential pressure proportioning valve if, passes through the first tabletting and guide rod dress
Set automatic adjustment of combustion gas flow, combustion gas differential pressure and gaseous mixture differential pressure continue to keep corresponding numerical difference relationship, make gas flow with
Mixed gas flow keeps stablizing.
Preferably, airstrainer and air butterfly valve are set gradually on the inside of the inlet end of the air pipeline.Combustion gas passes through
Differential pressure proportioning valve, combustion gas orifice plate converge before blower with by the air after airstrainer, air butterfly valve.In fan blade
Under high speed rotation stirring, air, combustion gas are sufficiently mixed.Coarse dust granules in air filtration net filtration air, avoid gaseous mixture
Detonation is generated since coarse dust granules are hit, air butterfly valve adjusts the adjustable combustion of revolving speed of blower for adjusting air mass flow
Air burner/fuel burner nozzle watt level.By the position of adjusting screw knife adjustment regulating device, make balance regulator
The position of the spring pressure equalization point under the performance number reset is reached, to further pass through the valve regulation combustion gas of differential pressure ratio
Flow.
Preferably, Non-return air valve is arranged in the position that the gas pipeline is connect with the air pipeline.Non-return air valve prevents
Combustion gas and air reversely flow back towards gas pipeline from air pipeline.
Preferably, around the combustion for being provided centrally at least one set of rounded distribution of the combustion gas orifice plate on the combustion gas orifice plate
Identical and uniformly distributed around the combustion gas aperture plate center fuel gas hole of several diameters is arranged in each combustion gas hole array in stomata array,
The aperture phase for the fuel gas hole in the combustion gas hole array organized from the center of the combustion gas orifice plate to the direction of circumferential surface, difference
Deng.Combustion gas is accelerated after fuel gas hole, is segmented, is altered course, is spread.Ensure that combustion gas can as early as possible enter air pipeline in
Air mixing, while multiply fuel gas flow with air cross and with having levels mixes in mixed process so that combustion gas with
Air is repeatedly mixed, and the uniformity that combustion gas mixes with air is improved, so that fuel gas buring is more abundant, reduces combustion gas
Waste and pernicious gas generation, energy conservation and environmental protection.
Preferably, at least one set of rounded distribution is provided centrally with around the mixing spiracular plate on the mixing spiracular plate
Gaseous mixture hole array, it is identical and uniformly distributed around gaseous mixture aperture plate center that several diameters are set in each gaseous mixture hole array
Mixing stomata, the institute from the center of the mixing spiracular plate to the direction of circumferential surface, in the gaseous mixture hole arrays of difference group
The aperture for stating mixing stomata is gradually increased.Gaseous mixture can be made to form multiply mixed airflow by mixing spiracular plate in this way, from
And make the internal layer air-flow close to combustor nozzle center small, be conducive to light a fire and be not easy to be blown out compared with air blast, improve igniting
Reliability.
Preferably, mixing spiracular plate is bent certain radian from circumferential surface to the outlet side of center towards the air pipeline,
The center of the i.e. described mixing spiracular plate is on different sections from the circumferential edge of the mixing spiracular plate, and mixes spiracular plate
Central point closer to the air pipeline outlet side.Mixing spiracular plate is bent certain radian convenient for combustion gas and air shape
At gaseous mixture play the role of convergence after mixing stomata, change the direction that gaseous mixture horizontally enters into, gaseous mixture obtains
Accelerate, subdivision, changed course, gaseous mixture is converged towards the central axes of air pipeline, obtains gaseous mixture near the central axes of combustion head
To sufficiently converging, the insufficient phenomenon of air-flow disperses combustion is prevented.
Preferably, a throttle orifice is arranged respectively for combustion gas and sky in the center of the combustion gas orifice plate and the mixing spiracular plate
Gas passes through.Q=CA [(2/ ρ) * (p2-p1)] ^ (1/2), Q is flow, and C is discharge coefficient, A throttle orifice circulation area, and p2-p1 is
Pressure difference, herein p2-p1 combustion gas orifice plate be △ PG, gaseous mixture orifice plate be △ P, ρ gas density, when p2-p1 is constant,
Flow Q is directly proportional to throttle orifice circulation area A, when throttle orifice circulation area A is constant, the square root of flow Q and (p2-p1) at
Direct ratio.
Preferably, the combustion gas orifice plate and the mixing spiracular plate are separately mounted to the combustion gas orifice valve and the mixing
On stomata plate valve, the combustion gas orifice valve and the mixer orifice valve are separately mounted to the gas pipeline and the air hose
On road.Pressure is certain, changes area regulating flow quantity；Area is certain, and flow changes, pressure change.The combustion gas orifice valve and
The gaseous mixture orifice valve can change △ PG and △ P by adjusting flow.
It is furthermore preferred that two combustion gas orifice plates are arranged in the combustion gas orifice valve, two are arranged in the gaseous mixture orifice valve
Spiracular plate is mixed, the one or more combustion gas hole arrays being disposed in parallel relation to one another of setting on combustion gas orifice plate, in each combustion gas hole array
Multiple fuel gas holes linearly arranged are set, the distance between two groups of combustion gas hole arrays are greater than the aperture of the fuel gas hole, wherein
One combustion gas orifice plate is fixed in the cavity of the combustion gas orifice valve, another described combustion gas orifice plate is close to fixed combustion
Spiracular plate moves up and down, and the combustion gas orifice plate between combustion gas hole array in the combustion gas orifice plate of movement can close fixed combustion gas
The fuel gas hole on orifice plate, and adjust the aperture of the fuel gas hole on fixed combustion gas orifice plate；It is constant in air flow rate
In the case of, pressure difference is adjusted by aperture.
Two mixing spiracular plates are set in the gaseous mixture orifice valve, it is one or more mutually equal to mix setting on spiracular plate
The gaseous mixture hole array of row setting, is arranged multiple mixing stomatas linearly arranged, two groups of mixing in each gaseous mixture hole array
The distance between stomata array is greater than the aperture of the mixing stomata, one of them described mixing spiracular plate is fixed on the mixing
In the cavity of stomata plate valve, another described mixing spiracular plate is close to fixed mixing spiracular plate and is moved up and down, movement
The mixing spiracular plate between gaseous mixture hole array in mixing spiracular plate can be closed described mixed on fixed mixing spiracular plate
Stomata is closed, and adjusts the aperture of the mixing stomata on fixed mixing spiracular plate.
Compared with the existing technology, the present invention achieves beneficial technical effect:
Combustion gas orifice plate is arranged air-fuel ratio mixer of the invention in the gas pipeline, sets in the air pipeline
Mixing spiracular plate and blower are set, stomata or throttle orifice are set on combustion gas orifice plate and mixing spiracular plate, pass through combustion gas and air respectively
Flow velocity increases after crossing combustion gas orifice plate and mixing spiracular plate, pressure reduction, thus respectively in combustion gas orifice plate and mixing spiracular plate two sides
Differential pressure, i.e. pressure difference are generated, flow is bigger, and the differential pressure of bad student is bigger, measures the combustion gas orifice plate by setting differential pressure proportioning valve
The gaseous mixture differential pressure △ P of the combustion gas differential pressure △ PG of two sides and the mixing spiracular plate two sides, while the spring in differential pressure proportioning valve
It can also generate spring differential pressure △ a to the first tabletting, and the sum of gaseous mixture differential pressure △ P and the spring differential pressure △ a and combustion gas differential pressure
The equal Shi Caihui of △ PG makes differential pressure proportioning valve be in equilibrium state, when combustion gas differential pressure △ PG or gaseous mixture differential pressure △ P change
When, differential pressure proportioning valve meeting automatic adjustment of combustion gas flow guarantees that gas flow and mixed gas flow keep certain quantitative value relationship,
Meet high-power lower combustion gas uniform and stable air-fuel mixture requirement in burner.
Detailed description of the invention
Fig. 1 is a kind of theory structure schematic diagram of air-fuel ratio mixer of the present invention；
Fig. 2 is a kind of structural schematic diagram of air-fuel ratio mixer of the present invention；
Appended drawing reference:
1. differential pressure proportioning valve；2. combustion gas orifice plate；3. airstrainer；4. air butterfly valve；5. blower；6. mixing spiracular plate；
7. fuel burner nozzle；8. screwdriver；9. balance regulator；10. spring；11. guide rod device；12. primary diaphragm；13. the second film
Piece；14. combustion gas pressure tracheae；15. gaseous mixture pressure tracheae；16. valve.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments to the present invention
It is further elaborated, but the scope of protection of present invention is not limited to following specific embodiments.
Embodiment 1
As illustrated in fig. 1 and 2, a kind of air-fuel ratio mixer, including gas pipeline, air pipeline, proportioning valve and combustion gas are burnt
The outlet side of mouth 7, the gas pipeline connects the air pipeline, and the proportioning valve is connected to the air inlet of the gas pipeline
The outlet side at end, the air pipeline connects fuel burner nozzle 7.
Combustion gas orifice plate 2 is set in the gas pipeline, and setting mixing spiracular plate 6 and blower 5, described in the air pipeline
Mixing spiracular plate 6 is positioned close on the inside of the outlet side of the air pipeline, and the blower 5 is arranged in the mixing spiracular plate 6
Between the inlet end of the air pipeline, the position that the outlet side of the gas pipeline is connect with the air pipeline is located at institute
It states between the inlet end of air pipeline and the blower 5；Airstrainer 3 is set gradually on the inside of the inlet end of the air pipeline
With air butterfly valve 4.Combustion gas is by differential pressure proportioning valve 1, combustion gas orifice plate 2 and passes through the air after airstrainer 3, air butterfly valve 4
Converge before blower 5.Under the high speed rotation stirring of 5 blade of blower, air, combustion gas are sufficiently mixed.Air filtration net filtration is empty
Coarse dust granules in gas avoid gaseous mixture from generating detonation since coarse dust granules are hit, and air butterfly valve 4 is for adjusting air
Flow adjusts revolving speed adjustable fuel gas burner/7 watt level of fuel burner nozzle of blower 5.
It is logical for combustion gas and air respectively that a throttle orifice is arranged in the center of the combustion gas orifice plate 2 and the mixing spiracular plate 6
It crosses.Setting design in this way, structure is simple and facilitates adjustment aperture and opens and closes the throttle orifice.The combustion gas orifice plate 2 and described mixed
It closes spiracular plate 6 to be separately mounted on the combustion gas orifice valve and the gaseous mixture orifice valve, the combustion gas orifice valve and described mixed
Clutch orifice valve is separately mounted on the gas pipeline and the air pipeline.The combustion gas orifice valve and the mixing stomata
Plate valve can close the gas pipeline and the air pipeline by the combustion gas orifice plate 2 and the mixing spiracular plate 6 at any time.
The proportioning valve is differential pressure proportioning valve 1, and two combustion gas pressure tracheaes 14 and two are arranged on the differential pressure proportioning valve 1
Combustion gas pressure point, the two sides setting of the mixing spiracular plate 6 is arranged in gaseous mixture pressure tracheae 15, the two sides of the combustion gas orifice plate 2
Gaseous mixture pressure point, one end of two combustion gas pressure tracheaes 14 are connected to the combustion of 2 two sides of combustion gas orifice plate
On gas pressure point, one end of two gaseous mixture pressure tracheaes 15 is connected to the described of mixing 6 two sides of spiracular plate
On gaseous mixture pressure point.
Two combustion gas pressure tracheaes 14 cooperate the differential pressure proportioning valve 1 to measure the combustion gas of 2 two sides of combustion gas orifice plate
Differential pressure △ PG, △ PG=Pd-Pe, Pd are the pressure of 2 front side of combustion gas orifice plate, the pressure of 2 rear side of Pe combustion gas orifice plate；Two described mixed
The gaseous mixture differential pressure △ P that gas pressure tracheae 15 cooperates the differential pressure proportioning valve 1 to measure mixing 6 two sides of spiracular plate is closed,
△ P=Pb-Pc, Pb are the pressure for mixing 6 front side of spiracular plate, the pressure of 6 rear side of Pc mixing spiracular plate.
Mixture control assembly is set on the differential pressure proportioning valve 1, and mixture control assembly includes 9 He of balance regulator
Guide rod device 11, mixture control assembly have automatic adjustment equilibrium function, adjust this device and are adjustable profile of equilibrium upper and lower translation,
Determine that combustion gas is more or a little less when balance.Spring is set between the balance regulator 9 and the guide rod device 11
10 and first tabletting, the upper end of the spring 10 connect with the lower end of the balance regulator 9, the lower end of the spring 10 with
The first tabletting connection, the groove that the upper end setting of the balance regulator 9 cooperates with screwdriver 8, passes through the screw
Knife 8 adjusts the height and position of the balance regulator 9.Primary diaphragm 12, the primary diaphragm are fixed in first tabletting
12 both ends are resisted against on the inner wall of the differential pressure proportioning valve 1, and differential pressure proportioning valve 1 is divided into two chambers up and down by primary diaphragm 12
Room, the primary diaphragm 12 include by-level section and the bending segment positioned at by-level section two sides, the spring 10 with
The upper surface central point of first tabletting connects, and the spring 10 acts in the first tabletting, and the spring 10 is to described the
The pressure that one tabletting generates is spring differential pressure △ a, △ a=F/S, and F is the elastic force of spring 10, and S is the area of the first tabletting, described
△ PG=△ P+ △ a.
Second tabletting is set in the guide rod device 11, the second tabletting is arranged in the lower section of first tabletting, and described
Secondary diaphragm 13 is fixed in two tablettings, the both ends of the secondary diaphragm 13 are resisted against on the inner wall of the differential pressure proportioning valve 1, and two
Gaseous mixture pressure tracheae 15 is separately positioned on the two sides up and down of first tabletting 12, and two combustion gas pressure tracheaes 14 are respectively set
In the two sides up and down of second tabletting 13, the first tabletting and the second tabletting area equation are existed by the combustion gas differential pressure △ PG
The pressure generated at second tabletting 13 and the pressure and spring 10 generated at first tabletting 12 by gaseous mixture differential pressure △ P
The sum of pressure it is equal, to make differential pressure proportioning valve 1 be in equilibrium state, intermediate connecting rod is in force balance state.Work as equilibrium-like
When state is destroyed, such as when gaseous mixture differential pressure △ P becomes larger, △ PG ≠ △ P+ △ a, gaseous mixture differential pressure applies the first tabletting 12
Downward pressure becomes larger, and tensile deformation occurs for spring 10, since the difference of combustion gas differential pressure △ PG and gaseous mixture differential pressure △ P are fixed
, in order to guarantee that spring 10 restores original state, the valve 16 on differential pressure proportioning valve 1 is adjusted, to increase fuel gas flow, is fired
Gas differential pressure △ PG becomes larger therewith, and upward pressure that combustion gas differential pressure generates at the second tabletting 13 increases, guide rod device 11 pass through to
Upper movement makes the compression of spring 10 automatically restore to original state and continue to 10 differential pressure △ a of spring, so that △ PG=△ P+ △
a。
The upper end of the balance regulator 9 is vertically set in the differential pressure proportioning valve 1, and balance regulator 9
Upper end is connected through a screw thread with the differential pressure proportioning valve 1, and adjusting screw knife 8 can be screwed into balance regulator 9 or lemon goes out, from
And the spring 10 and the first tabletting 12 are driven and arrive corresponding position, make spring 10 and the first tabletting 12 according to related burner function
Rate reaches corresponding spring pressure equalization point, guarantees △ PG=△ P+ △ a.If △ PG ≠ △ P+ △ a, if differential pressure proportioning valve 1
By 11 automatic adjustment of combustion gas flow of the first tabletting 12 and guide rod device, combustion gas differential pressure and gaseous mixture differential pressure continue to keep corresponding
Numerical difference relationship makes gas flow and mixed gas flow keep stablizing.
Since the numerical value of △ a under the conditions of different capacity has certain difference, after the revolving speed for adjusting blower 5, tune can be passed through
The position of 8 adjustment regulating device 9 of screwdriver is saved, under the performance number in order to make the arrival reset of balance regulator 9
The position of spring pressure equalization point, to further pass through 1 adjustment of combustion gas flow of differential pressure proportioning valve.When needing to improve burner
When combustion power, increase the revolving speed of blower 5, the flow and flow rate of gaseous mixture increases at this time, generates after mixing spiracular plate 6
Gaseous mixture differential pressure △ P increase, at this time in order to guarantee △ PG=△ P+ △ a, then differential pressure proportioning valve 1 can automatically adjust combustion gas stream
Amount increases gas flow, increases combustion gas differential pressure △ PG, guarantees the stability of burning.
Combustion gas orifice plate 2 is arranged, in the air pipeline in air-fuel ratio mixer of the invention in the gas pipeline
Stomata or throttle orifice are set on setting mixing spiracular plate 6 and blower 5, combustion gas orifice plate 2 and mixing spiracular plate 6, make combustion gas and air
Flow velocity increases after combustion gas orifice plate 2 and mixing spiracular plate 6 respectively, pressure reduction, thus respectively in combustion gas orifice plate 2 and gaseous mixture
6 two sides of orifice plate generate differential pressure, i.e. pressure difference, and flow is bigger, and the differential pressure of bad student is bigger, measure institute by setting differential pressure proportioning valve 1
State the combustion gas differential pressure △ PG of 2 two sides of combustion gas orifice plate and the gaseous mixture differential pressure △ P of mixing 6 two sides of spiracular plate, while differential pressure ratio
Spring 10 in example valve 1 can also generate spring differential pressure △ a to the first tabletting 12, and gaseous mixture differential pressure △ P and the spring differential pressure
The sum of △ a Shi Caihui equal with combustion gas differential pressure △ PG makes differential pressure proportioning valve 1 be in equilibrium state, when combustion gas differential pressure △ PG or mixing
When gas differential pressure △ P changes, differential pressure proportioning valve 1 can automatic adjustment of combustion gas flow, guarantee gas flow and mixed gas flow guarantor
Certain quantitative value relationship is held, high-power lower combustion gas uniform and stable air-fuel mixture requirement in burner is met.
Embodiment 2
The embodiment only describes and the difference of above-described embodiment, remaining technical characteristic is same as the previously described embodiments.?
In the present embodiment, Non-return air valve is arranged in the position that the gas pipeline is connect with the air pipeline.Non-return air valve prevents combustion gas
Gas pipeline is reversely flowd back towards from air pipeline with air.
Embodiment 3
The embodiment only describes and the difference of above-described embodiment, remaining technical characteristic is same as the previously described embodiments.?
In the present embodiment, around the combustion gas for being provided centrally at least one set of rounded distribution of the combustion gas orifice plate 2 on the combustion gas orifice plate 2
Identical and uniformly distributed around the combustion gas aperture plate center fuel gas hole of several diameters is arranged in each combustion gas hole array in hole array, by
The aperture phase for the fuel gas hole in the combustion gas hole array that the center of the combustion gas orifice plate is organized to the direction of circumferential surface, difference
Deng.Combustion gas is accelerated after fuel gas hole, is segmented, is altered course, is spread.Ensure that combustion gas can as early as possible enter air pipeline in
Air mixing, while multiply fuel gas flow with air cross and with having levels mixes in mixed process so that combustion gas with
Air is repeatedly mixed, and the uniformity that combustion gas mixes with air is improved, so that fuel gas buring is more abundant, reduces combustion gas
Waste and pernicious gas generation, energy conservation and environmental protection.
The mixed of at least one set of rounded distribution is provided centrally with around the mixing spiracular plate 6 on the mixing spiracular plate 6
Stomata array is closed, it is identical and uniformly distributed around mixing 6 center of spiracular plate that several diameters are set in each gaseous mixture hole array
Stomata is mixed, it is described in the gaseous mixture hole array organized from the center of the mixing spiracular plate 6 to the direction of circumferential surface, difference
The aperture of mixing stomata is gradually increased.Gaseous mixture can be made to form multiply mixed airflow by mixing spiracular plate 6 in this way, thus
So that the internal layer air-flow close to combustor nozzle center is small, is conducive to light a fire and be not easy to be blown out compared with air blast, improves igniting
Reliability.
Embodiment 4
The embodiment only describes and the difference of above-described embodiment, remaining technical characteristic is same as the previously described embodiments.?
In the present embodiment, mixing spiracular plate 6 is bent certain radian from circumferential surface to the outlet side of center towards the air pipeline, i.e. institute
The center for stating mixing spiracular plate 6 is on different sections from the circumferential edge of the mixing spiracular plate 6, and mixes spiracular plate 6
Central point closer to the air pipeline outlet side.The radian that the center curvature of mixing spiracular plate 6 is certain is convenient for combustion gas
The gaseous mixture formed with air plays the role of convergence after mixing stomata, changes the direction that gaseous mixture horizontally enters into, and mixes
Acceleration, subdivision, changed course are so incensed that in conjunction, and gaseous mixture is converged towards the central axes of air pipeline, make gaseous mixture in the axis of combustion head
Line is nearby sufficiently converged, and the insufficient phenomenon of air-flow disperses combustion is prevented.
Embodiment 5
The embodiment only describes and the difference of above-described embodiment, remaining technical characteristic is same as the previously described embodiments.?
In the present embodiment, two combustion gas orifice plates 2 are set in the combustion gas orifice valve, two gaseous mixtures are set in the gaseous mixture orifice valve
Orifice plate 6, the one or more combustion gas hole arrays being disposed in parallel relation to one another of setting on combustion gas orifice plate 2 are arranged in each combustion gas hole array
Multiple fuel gas holes linearly arranged, the distance between two groups of combustion gas hole arrays are greater than the aperture of the fuel gas hole, one of them
The combustion gas orifice plate 2 is fixed in the cavity of the combustion gas orifice valve, another described combustion gas orifice plate 2 is close to fixed combustion gas
Orifice plate 2 moves up and down, and the combustion gas orifice plate 2 between combustion gas hole array in the combustion gas orifice plate 2 of movement can close fixed combustion
The fuel gas hole on spiracular plate 2, and adjust the aperture of the fuel gas hole on fixed combustion gas orifice plate 2；
Two mixing spiracular plates 6 are set in the gaseous mixture orifice valve, it is one or more mutually to mix setting on spiracular plate 6
Multiple mixing stomatas linearly arranged are arranged in each gaseous mixture hole array for gaseous mixture hole array disposed in parallel, and two groups mixed
The aperture that the distance between stomata array is greater than the mixing stomata is closed, one of them described mixing spiracular plate 6 is fixed on described
In the cavity of gaseous mixture orifice valve, another described mixing spiracular plate 6 is close to fixed mixing spiracular plate 6 and is moved up and down,
The mixing spiracular plate 6 between gaseous mixture hole array in the mixing spiracular plate 6 of movement can be closed on fixed mixing spiracular plate 6
The mixing stomata, and adjust the aperture of the mixing stomata on fixed mixing spiracular plate 6.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is modified.Therefore, the invention is not limited to the specific embodiments disclosed and described above, to the one of invention
A little modifications and changes should also be as falling into the scope of the claims of the present invention.In addition, although being used in this specification
Some specific terms, these terms are merely for convenience of description, does not constitute any restrictions to invention.
Claims (10)
1. a kind of air-fuel ratio mixer, including gas pipeline, air pipeline, proportioning valve and fuel burner nozzle, the gas pipeline
Outlet side connect the air pipeline, the proportioning valve is connected to the inlet end of the gas pipeline, the air pipeline
Outlet side connects fuel burner nozzle, which is characterized in that
Combustion gas orifice plate is set in the gas pipeline, setting mixing spiracular plate and blower, the gaseous mixture in the air pipeline
Orifice plate is positioned close on the inside of the outlet side of the air pipeline, and the blower is arranged in the mixing spiracular plate and the air
Between the inlet end of pipeline, the position that the outlet side of the gas pipeline is connect with the air pipeline is located at the air pipeline
Inlet end and the blower between；
The proportioning valve is differential pressure proportioning valve, and two combustion gas pressure tracheaes are arranged on the differential pressure proportioning valve and two gaseous mixtures take
Combustion gas pressure point is arranged in air pipe, the two sides of the combustion gas orifice plate, and gaseous mixture pressure point is arranged in the two sides of the mixing spiracular plate,
One end of two combustion gas pressure tracheaes is connected on the combustion gas pressure point of combustion gas orifice plate two sides, two institutes
The one end for stating gaseous mixture pressure tracheae is connected on the gaseous mixture pressure point of the mixing spiracular plate two sides.
2. a kind of air-fuel ratio mixer according to claim 1, which is characterized in that two combustion gas pressure tracheaes are matched
Close the combustion gas differential pressure △ PG that the differential pressure proportioning valve measures combustion gas orifice plate two sides, two gaseous mixture pressure tracheae cooperations
The differential pressure proportioning valve measures the gaseous mixture differential pressure △ P of the mixing spiracular plate two sides.
3. a kind of air-fuel ratio mixer according to claim 2, which is characterized in that be arranged on the differential pressure proportioning valve flat
Spring and the first tabletting, institute is arranged in the regulating device that weighs and guide rod device between the balance regulator and the guide rod device
The upper end for stating spring is connect with the lower end of the balance regulator, and the lower end of the spring is connect with first tabletting, institute
The groove for stating the upper end setting and screwdriver cooperation of balance regulator, adjusts the balance regulator by the screwdriver
Height and position.
4. a kind of air-fuel ratio mixer according to claim 3, which is characterized in that fix first in first tabletting
Diaphragm, the both ends of the primary diaphragm are resisted against on the inner wall of the differential pressure proportioning valve, and the primary diaphragm includes by-level
Section and the bending segment positioned at by-level section two sides, the spring are connect with the upper surface central point of first tabletting,
The spring is spring differential pressure △ a, the △ PG=△ P+ △ a to the pressure that first tabletting generates.
5. a kind of air-fuel ratio mixer according to claim 1, which is characterized in that in the inlet end of the air pipeline
Side sets gradually airstrainer and air butterfly valve.
6. a kind of air-fuel ratio mixer according to claim 1, which is characterized in that the gas pipeline and the air
Non-return air valve is arranged in the position of pipeline connection.
7. a kind of air-fuel ratio mixer according to claim 1, which is characterized in that around the combustion on the combustion gas orifice plate
The combustion gas hole array for being provided centrally at least one set of rounded distribution of spiracular plate is arranged in each combustion gas hole array several
Identical and uniformly distributed around the combustion gas aperture plate center fuel gas hole of a diameter, it is different from the center of the combustion gas orifice plate to the direction of circumferential surface
The aperture of the fuel gas hole in the combustion gas hole array of group is equal.
8. a kind of air-fuel ratio mixer according to claim 1, which is characterized in that around described on the mixing spiracular plate
The gaseous mixture hole array for being provided centrally at least one set of rounded distribution of mixing spiracular plate, in each gaseous mixture hole array
Identical and uniformly distributed around the gaseous mixture aperture plate center mixing stomata of several diameters is set, from the center of the mixing spiracular plate to week
The aperture in the direction in face, the mixing stomata in the gaseous mixture hole array that difference is organized is gradually increased.
9. a kind of air-fuel ratio mixer according to claim 1, which is characterized in that the combustion gas orifice plate and the mixing
The center of spiracular plate is arranged a throttle orifice and passes through respectively for combustion gas and air.
10. a kind of air-fuel ratio mixer according to claim 9, which is characterized in that the combustion gas orifice plate and described mixed
It closes spiracular plate to be separately mounted on the combustion gas orifice valve and the gaseous mixture orifice valve, the combustion gas orifice valve and the mixing
Device orifice valve is separately mounted on the gas pipeline and the air pipeline.
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| CN201811603781.8A CN109442405B (en) | 2018-12-26 | 2018-12-26 | Air-fuel ratio example mixer |
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|---|---|---|---|
| CN201811603781.8A CN109442405B (en) | 2018-12-26 | 2018-12-26 | Air-fuel ratio example mixer |
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| CN109442405A true CN109442405A (en) | 2019-03-08 |
| CN109442405B CN109442405B (en) | 2023-12-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112128984A (en) * | 2019-06-25 | 2020-12-25 | 芜湖美的厨卫电器制造有限公司 | Gas water heater's gas adjusting device and gas water heater that has it |
| CN112128985A (en) * | 2019-06-25 | 2020-12-25 | 芜湖美的厨卫电器制造有限公司 | Gas water heater's gas adjusting device and gas water heater that has it |
| CN112146280A (en) * | 2019-06-28 | 2020-12-29 | 华帝股份有限公司 | Control method of back pressure self-adaptive full-premix gas water heater and gas water heater |
| CN112146283A (en) * | 2019-06-28 | 2020-12-29 | 华帝股份有限公司 | Control method of fully-premixed gas water heater and gas water heater thereof |
| CN112146282A (en) * | 2019-06-28 | 2020-12-29 | 华帝股份有限公司 | Control method of full-premix gas water heater and gas water heater |
| CN112146281A (en) * | 2019-06-28 | 2020-12-29 | 华帝股份有限公司 | Control method of fully-premixed gas water heater and gas water heater thereof |
| CN113606581A (en) * | 2021-08-23 | 2021-11-05 | 四川铭能科技开发有限公司 | Self-operated hot air proportion adjusting nozzle system |
| CN114234189A (en) * | 2022-01-05 | 2022-03-25 | 北京富士特锅炉有限公司 | Rear premixing wall type laminar flow water cooling ultra-low nitrogen combustion device and control method thereof |
| EP4242517A1 (en) * | 2022-03-08 | 2023-09-13 | Bertelli & Partners S.r.l. | Device and method for controlling a fuel-oxidizer mixture for a premix gas burner |
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| CN112128984A (en) * | 2019-06-25 | 2020-12-25 | 芜湖美的厨卫电器制造有限公司 | Gas water heater's gas adjusting device and gas water heater that has it |
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| CN112146280A (en) * | 2019-06-28 | 2020-12-29 | 华帝股份有限公司 | Control method of back pressure self-adaptive full-premix gas water heater and gas water heater |
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| CN112146282A (en) * | 2019-06-28 | 2020-12-29 | 华帝股份有限公司 | Control method of full-premix gas water heater and gas water heater |
| CN112146281A (en) * | 2019-06-28 | 2020-12-29 | 华帝股份有限公司 | Control method of fully-premixed gas water heater and gas water heater thereof |
| CN113606581A (en) * | 2021-08-23 | 2021-11-05 | 四川铭能科技开发有限公司 | Self-operated hot air proportion adjusting nozzle system |
| CN113606581B (en) * | 2021-08-23 | 2024-03-19 | 四川铭能科技开发有限公司 | Self-operated hot air proportion adjusting nozzle system |
| CN114234189A (en) * | 2022-01-05 | 2022-03-25 | 北京富士特锅炉有限公司 | Rear premixing wall type laminar flow water cooling ultra-low nitrogen combustion device and control method thereof |
| CN114234189B (en) * | 2022-01-05 | 2022-07-05 | 北京富士特锅炉有限公司 | Rear premixing wall type laminar flow water cooling ultra-low nitrogen combustion device and control method thereof |
| EP4242517A1 (en) * | 2022-03-08 | 2023-09-13 | Bertelli & Partners S.r.l. | Device and method for controlling a fuel-oxidizer mixture for a premix gas burner |
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