CN109442405B - Air-fuel ratio example mixer - Google Patents
Air-fuel ratio example mixer Download PDFInfo
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- CN109442405B CN109442405B CN201811603781.8A CN201811603781A CN109442405B CN 109442405 B CN109442405 B CN 109442405B CN 201811603781 A CN201811603781 A CN 201811603781A CN 109442405 B CN109442405 B CN 109442405B
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- 239000000446 fuel Substances 0.000 title claims abstract description 19
- 239000011148 porous material Substances 0.000 claims abstract description 83
- 239000000203 mixture Substances 0.000 claims description 88
- 238000002156 mixing Methods 0.000 claims description 34
- 238000003491 array Methods 0.000 claims description 24
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 239000007789 gas Substances 0.000 abstract description 359
- 239000002737 fuel gas Substances 0.000 abstract description 16
- 230000001105 regulatory effect Effects 0.000 description 15
- 238000002485 combustion reaction Methods 0.000 description 10
- 239000000428 dust Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 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
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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
- F23D14/46—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
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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
- F23D14/46—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 an air-fuel ratio example mixer, wherein a gas pore plate is arranged in a gas pipeline in the air-fuel ratio example mixer, a mixed pore plate and a fan are arranged in an air pipeline, and gas holes or orifices are arranged on the gas pore plate and the mixed pore plate, so that the flow rate of gas and air after passing through the gas pore plate and the mixed pore plate respectively is increased, the pressure is reduced, differential pressure is generated on two sides of the gas pore plate and the mixed pore plate respectively, the differential pressure delta PG on two sides of the gas pore plate and the mixed gas differential pressure delta P on two sides of the mixed pore plate are measured through a differential pressure proportional valve, the differential pressure proportional valve is in a balanced state when the sum of the differential pressure delta P of the mixed gas differential pressure delta P and the differential pressure delta PG of the gas is equal to the differential pressure delta PG of the gas, and when the differential pressure delta P of the mixed gas is changed, the differential pressure proportional valve can automatically adjust the gas flow, the gas flow and the mixed gas flow are ensured to keep a certain quantity relation, and the uniform and stable air-fuel gas mixed gas requirements in a large-power burner are met.
Description
Technical Field
The invention relates to the field of gas combustion equipment, in particular to an air-fuel ratio mixer.
Background
In the technical field of gas burners and gas burners, stable combustion requires uniform mixing of a proper amount of air and gas, so that nitrogen oxides can be greatly reduced, and the national specified emission standard is achieved. To obtain a uniform gas mixture, a screen is generally used; in order to obtain the mixed gas with stable proportion, means such as venturi, pressure type proportional valve and the like are adopted. The venturi is used for a plurality of low-power burners, is not suitable for a high-power burner, and the linearity of the pressure type proportional valve is not good.
The patent with publication number CN206904977U discloses a stable and precise flow-regulating gas passing regulating device, when the exhaust fan works, air enters from the air inlet pipe, gas enters from the gas inlet control valve group and the self-operated differential pressure regulating valve to the air inlet pipe, the gas and air are mixed and sent into the combustion chamber by the exhaust fan, the gas is controlled to flow through the electric switch valve of the gas inlet control valve group, and the electric gas flow rate proportional regulating valve is used for controlling the gas flow rate; the larger the working power of the exhaust fan is, the larger the air inlet flow of the air inlet pipe is, the wind pressure of the air inlet pipe is also increased, and conversely, the smaller the air pressure of the air inlet pipe is; the negative pressure pipe connected with the air inlet pipe is in a negative pressure state, the opening degree of the flow control pressure sensing film in the self-operated pressure difference regulating valve is larger as the negative pressure is larger, the gas flow passes through the valve more (namely, the larger the negative pressure is, the larger the air passing flow is, the more the needed gas is, the direct proportion is) and the opening degree of the flow control pressure sensing film in the self-operated pressure difference regulating valve is dynamically changed along with the size of the negative pressure.
The patent regulates the flow of the fuel gas by sensing the negative pressure of the negative pressure pipe connected with the air inlet pipe through the self-operated pressure difference regulating valve, and can not measure whether the pressure of the mixed gas after the fuel gas and the air are mixed can reach the stable combustion standard or not, and can not regulate the flow of the fuel gas by measuring the pressure of the mixed gas.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide the air-fuel ratio mixer, which automatically adjusts the gas flow by arranging the differential pressure proportional valve, ensures that the gas flow and the gas flow keep a certain quantitative relation, and meets the requirements of uniform and stable air-fuel mixture in the gas burner under high power.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the utility model provides an air-fuel ratio case blender, includes gas pipeline, air pipeline, proportional valve and gas nozzle, gas pipeline's the end of giving vent to anger is connected air pipeline, the proportional valve is connected gas pipeline's inlet end, gas pipeline's the end of giving vent to anger is connected the gas nozzle.
The gas pipeline is internally provided with a gas pore plate, the air pipeline is internally provided with a mixed gas pore plate and a fan, the mixed gas pore plate is arranged on the inner side of the air outlet end close to the air pipeline, the fan is arranged between the mixed gas pore plate and the air inlet end of the air pipeline, and the position where the air outlet end of the gas pipeline is connected with the air pipeline is positioned between the air inlet end of the air pipeline and the fan;
the proportional valve is a differential pressure proportional valve, two gas pressure taking pipes and two gas mixture pressure taking pipes are arranged on the differential pressure proportional valve, gas pressure taking points are arranged on two sides of the gas orifice plate, gas mixture pressure taking points are arranged on two sides of the gas mixture orifice plate, one ends of the gas pressure taking pipes are respectively connected to the gas pressure taking points on two sides of the gas orifice plate, and one ends of the gas mixture pressure taking pipes are respectively connected to the gas mixture pressure taking points on two sides of the gas mixture orifice plate.
Preferably, the two gas pressure-taking pipes are matched with the differential pressure proportional valve to measure the gas differential pressure delta PG at two sides of the gas orifice plate, and the two gas mixture pressure-taking pipes are matched with the differential pressure proportional valve to measure the gas mixture differential pressure delta P at two sides of the gas mixture orifice plate.
Preferably, the differential pressure proportional valve is provided with a balance adjusting device and a guide rod device, a spring and a first pressing sheet are arranged between the balance adjusting device and the guide rod device, the upper end of the spring is connected with the lower end of the balance adjusting device, the lower end of the spring is connected with the first pressing sheet, the upper end of the balance adjusting device is provided with a groove matched with a screw driver, and the height position of the balance adjusting device is adjusted by the screw driver.
Preferably, a first diaphragm is fixed on the first pressing sheet, two ends of the first diaphragm are propped against the inner wall of the differential pressure proportional valve, the differential pressure proportional valve is divided into an upper chamber and a lower chamber by the first diaphragm, the first diaphragm comprises a middle horizontal section and bending sections positioned on two sides of the middle horizontal section, a spring is connected with the center point of the upper surface of the first pressing sheet, the spring acts on the first pressing sheet, the pressure generated by the spring on the first pressing sheet is a spring differential pressure delta a, and delta PG= delta P+ delta a. The upper end of the balance adjusting device is vertically arranged in the differential pressure proportional valve, the upper end of the balance adjusting device is connected with the differential pressure proportional valve through threads, and the balance adjusting device can be screwed in or out through an adjusting screw driver, so that the spring and the first pressing piece are driven to corresponding positions, the spring and the first pressing piece reach spring pressure balance points of corresponding power burners, and the deltaPG= deltaP+ deltaais ensured. If the delta PG is not equal to the delta P+delta a, the differential pressure proportional valve automatically adjusts the gas flow through the first pressing sheet and the guide rod device, and the gas differential pressure and the mixed gas differential pressure keep the corresponding numerical value difference relation, so that the gas flow and the mixed gas flow are kept stable.
Preferably, an air filter screen and an air butterfly valve are sequentially arranged on the inner side of the air inlet end of the air pipeline. The fuel gas is converged with the air passing through the air filter screen and the air butterfly valve in front of the fan through the differential pressure proportional valve and the fuel gas orifice plate. Under the high-speed rotation stirring of the fan blades, the air and the fuel gas are fully mixed. The air filter screen filters coarse dust particles in the air, so that the mixed gas is prevented from knocking due to the impact of the coarse dust particles, the air butterfly valve is used for adjusting air flow, and the rotating speed of the fan is adjusted to adjust the power of the gas burner/gas burner. The position of the balance adjusting device is adjusted by adjusting the screw driver, so that the balance adjusting device reaches the position of the spring pressure balance point under the reset power value, and the gas flow is further adjusted by the differential pressure proportional valve.
Preferably, a unidirectional air valve is arranged at the connection position of the gas pipeline and the air pipeline. The one-way gas valve prevents the reverse flow of gas and air from the air conduit back to the gas conduit.
Preferably, at least one group of gas hole arrays which are distributed circularly is arranged on the gas hole plate around the center of the gas hole plate, a plurality of gas holes which have the same diameter and are uniformly distributed around the center of the gas hole plate are arranged on each gas hole array, and the diameters of the gas holes on the gas hole arrays in different groups are equal from the center of the gas hole plate to the direction of the peripheral surface. The fuel gas is accelerated, subdivided, redirected and diffused after passing through the fuel gas holes. The gas can be mixed with air in the air pipeline as soon as possible, and meanwhile, a plurality of gas flows are crossed with air in the mixing process and are mixed in a layered manner, so that the gas and the air are mixed for a plurality of times, the uniformity of mixing the gas and the air is improved, the gas is combusted more fully, the waste of the gas and the generation of harmful gas are reduced, and the energy-saving and environment-friendly effects are realized.
Preferably, at least one group of mixing air hole arrays which are distributed circularly is arranged on the mixing air hole plate around the center of the mixing air hole plate, a plurality of mixing air holes which are identical in diameter and uniformly distributed around the center of the mixing air hole plate are arranged on each mixing air hole array, and the apertures of the mixing air holes on the mixing air hole arrays of different groups are gradually increased from the center of the mixing air hole plate to the peripheral surface. Therefore, the mixed gas can form a plurality of mixed gas flows through the mixed gas pore plate, so that the inner-layer gas flow close to the center of the burner nozzle of the burner is small, the ignition is facilitated, the gas is not easy to blow out by stronger gas flow, and the ignition reliability is improved.
Preferably, the air-mixing hole plate is bent from the peripheral surface to the center towards the air outlet end of the air pipeline by a certain radian, namely the center of the air-mixing hole plate and the peripheral edge of the air-mixing hole plate are positioned on different sections, and the center point of the air-mixing hole plate is closer to the air outlet end of the air pipeline. The mixed gas formed by the fuel gas and the air conveniently flows through the mixed gas holes by bending the mixed gas hole plate by a certain radian to play a role in converging, the horizontal entering direction of the mixed gas is changed, the mixed gas is accelerated, subdivided and redirected, the mixed gas converges towards the central axis of the air pipeline, the mixed gas is fully converged near the central axis of the combustion head, and the phenomenon of insufficient air flow dispersion combustion is prevented.
Preferably, an orifice is arranged at the center of the gas orifice plate and the gas mixture orifice plate for gas and air to pass through respectively. Q=ca [ (2/ρ) (P2-P1) ] (1/2), Q is the flow, C is the flow coefficient, a orifice flow area, P2-P1 is the pressure difference, where P2-P1 is Δpg at the gas orifice plate, Δp at the gas mixture orifice plate, ρ gas density, P2-P1 is unchanged, flow Q is proportional to orifice flow area a, and flow Q is proportional to the square root of (P2-P1) when orifice flow area a is unchanged.
Preferably, the gas orifice plate and the gas mixture orifice plate are respectively installed on the gas orifice plate valve and the gas mixture orifice plate valve, and the gas orifice plate valve and the gas mixture orifice plate valve are respectively installed on the gas pipeline and the air pipeline. The pressure is certain, and the flow can be adjusted by changing the area; the area is constant, the flow rate is changed, and the pressure is changed. The gas orifice valve and the gas mixture orifice valve can change Δpg and Δp by adjusting the flow rate.
More preferably, two gas hole plates are arranged in the gas hole plate valve, one or more gas hole arrays which are arranged in parallel are arranged on the gas hole plate, a plurality of gas holes which are arranged in a linear manner are arranged on each gas hole array, the distance between the two groups of gas hole arrays is larger than the aperture of the gas hole, one gas hole plate is fixed in the cavity of the gas hole plate valve, the other gas hole plate is in lifting motion closely to the fixed gas hole plate, and the gas hole plates between the gas hole arrays in the moving gas hole plate can seal the gas holes on the fixed gas hole plate and adjust the aperture of the gas holes on the fixed gas hole plate; the pressure difference is regulated by the aperture with the airflow flow rate unchanged.
Two gas mixture pore plates are arranged in the gas mixture pore plate valve, one or more gas mixture pore arrays which are arranged in parallel are arranged on the gas mixture pore plate, a plurality of gas mixture pores which are arranged in a linear mode are arranged on each gas mixture pore array, the distance between the two groups of gas mixture pore arrays is larger than the aperture of the gas mixture pore, one gas mixture pore plate is fixed in the cavity of the gas mixture pore plate valve, the other gas mixture pore plate is in lifting motion in a manner of clinging to the fixed gas mixture pore plate, the gas mixture pore plate between the gas mixture pore arrays in the moving gas mixture pore plate can seal the gas mixture pore on the fixed gas mixture pore plate, and the aperture of the gas mixture pore on the fixed gas mixture pore plate is adjusted.
Compared with the prior art, the invention has the beneficial technical effects that:
the air-fuel ratio example mixer is characterized in that a gas pore plate is arranged in a gas pipeline, a mixed pore plate and a fan are arranged in an air pipeline, and air holes or orifices are arranged on the gas pore plate and the mixed pore plate, so that the flow rate of gas and air is increased after the gas and the air pass through the gas pore plate and the mixed pore plate respectively, the pressure is reduced, and accordingly differential pressure is generated on two sides of the gas pore plate and the mixed pore plate respectively, namely, the pressure difference is larger, the differential pressure proportional valve is used for measuring the gas differential pressure delta PG on two sides of the gas pore plate and the mixed gas differential pressure delta P on two sides of the mixed pore plate, meanwhile, a spring differential pressure delta a is generated by a spring in the differential pressure proportional valve, and the differential pressure delta P of the mixed gas is in a balanced state when the sum of the differential pressure delta P of the gas and the differential pressure delta PG of the gas is equal to the differential pressure delta PG of the gas, and when the differential pressure delta PG of the mixed gas is changed, the differential pressure proportional valve can be automatically regulated, and the gas flow and the mixed gas flow can be ensured to keep a certain quantitative relation, and the uniform gas flow and stable gas flow in a large-power surrounding device can be met.
Drawings
FIG. 1 is a schematic diagram of an air-fuel ratio example mixer according to the present invention;
FIG. 2 is a schematic view of an air-fuel ratio example mixer according to the present invention;
reference numerals:
1. a differential pressure proportional valve; 2. a gas orifice plate; 3. an air filter screen; 4. an air butterfly valve; 5. a blower; 6. a gas mixture pore plate; 7. a gas burner; 8. a screwdriver; 9. balance adjusting device; 10. a spring; 11. a guide rod device; 12. a first membrane; 13. a second membrane; 14. a gas pressure taking pipe; 15. a mixed gas taking pressure pipe; 16. and (3) a valve.
Detailed Description
The present invention will be further described in detail with reference to the following examples, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent, but the scope of the present invention is not limited to the following specific examples.
Example 1
As shown in fig. 1 and 2, the air-fuel ratio example mixer comprises a gas pipeline, an air pipeline, a proportional valve and a gas burner 7, wherein the gas outlet end of the gas pipeline is connected with the air pipeline, the proportional valve is connected with the gas inlet end of the gas pipeline, and the gas outlet end of the air pipeline is connected with the gas burner 7.
The gas pipeline is internally provided with a gas pore plate 2, the air pipeline is internally provided with a mixed gas pore plate 6 and a fan 5, the mixed gas pore plate 6 is arranged on the inner side of the air outlet end close to the air pipeline, the fan 5 is arranged between the mixed gas pore plate 6 and the air inlet end of the air pipeline, and the position where the air outlet end of the gas pipeline is connected with the air pipeline is positioned between the air inlet end of the air pipeline and the fan 5; an air filter screen 3 and an air butterfly valve 4 are sequentially arranged on the inner side of the air inlet end of the air pipeline. The fuel gas is converged with the air after passing through the air filter screen 3 and the air butterfly valve 4 before the fan 5 through the differential pressure proportional valve 1 and the fuel gas pore plate 2. Under the high-speed rotation stirring of the blades of the fan 5, the air and the fuel gas are fully mixed. The air filter screen filters coarse dust particles in the air, so that the mixed gas is prevented from knocking due to the impact of the coarse dust particles, the air butterfly valve 4 is used for adjusting air flow, and the rotating speed of the fan 5 is adjusted to adjust the power of the gas burner/gas burner 7.
The centers of the gas orifice plate 2 and the gas mixture orifice plate 6 are provided with an orifice for the gas and the air to pass through respectively. The design is arranged in this way, the structure is simple, and the aperture can be conveniently adjusted and the orifice can be conveniently opened and closed. The gas orifice plate 2 and the mixed gas orifice plate 6 are respectively arranged on the gas orifice plate valve and the mixed gas orifice plate valve, and the gas orifice plate valve and the mixer orifice plate valve are respectively arranged on the gas pipeline and the air pipeline. The gas hole plate valve and the mixed gas hole plate valve can close the gas pipeline and the air pipeline at any time through the gas hole plate 2 and the mixed gas hole plate 6.
The proportional valve is a differential pressure proportional valve 1, two gas pressure taking pipes 14 and two gas mixture pressure taking pipes 15 are arranged on the differential pressure proportional valve 1, gas pressure taking points are arranged on two sides of a gas orifice plate 2, gas mixture pressure taking points are arranged on two sides of a gas mixture orifice plate 6, one ends of the two gas pressure taking pipes 14 are respectively connected to the gas pressure taking points on two sides of the gas orifice plate 2, and one ends of the two gas mixture pressure taking pipes 15 are respectively connected to the gas mixture pressure taking points on two sides of the gas mixture orifice plate 6.
The two gas pressure taking pipes 14 are matched with the differential pressure proportional valve 1 to measure the gas differential pressure delta PG at two sides of the gas orifice plate 2, wherein delta PG=Pd-Pe, pd is the pressure at the front side of the gas orifice plate 2, and Pe is the pressure at the rear side of the gas orifice plate 2; the two mixed gas pressure taking pipes 15 are matched with the differential pressure proportional valve 1 to measure the mixed gas differential pressure delta P at the two sides of the mixed gas pore plate 6,
Δp=pb-Pc, pb is the pressure of the front side of the gas mixture hole plate 6, pc is the pressure of the rear side of the gas mixture hole plate 6.
The differential pressure proportional valve 1 is provided with a mixing ratio adjusting device, the mixing ratio adjusting device comprises a balance adjusting device 9 and a guide rod device 11, the mixing ratio adjusting device has an automatic balance adjusting function, and the adjusting device can adjust the vertical translation of a balance curve to determine whether more or less fuel gas exists during balance. The balance adjusting device 9 and the guide rod device 11 are provided with a spring 10 and a first pressing piece, the upper end of the spring 10 is connected with the lower end of the balance adjusting device 9, the lower end of the spring 10 is connected with the first pressing piece, the upper end of the balance adjusting device 9 is provided with a groove matched with the screwdriver 8, and the height position of the balance adjusting device 9 is adjusted through the screwdriver 8. The first diaphragm 12 is fixed on the first pressing sheet, two ends of the first diaphragm 12 are propped against the inner wall of the differential pressure proportional valve 1, the first diaphragm 12 divides the differential pressure proportional valve 1 into an upper chamber and a lower chamber, the first diaphragm 12 comprises a middle horizontal section and bending sections positioned on two sides of the middle horizontal section, the spring 10 is connected with the center point of the upper surface of the first pressing sheet, the spring 10 acts on the first pressing sheet, the pressure generated by the spring 10 on the first pressing sheet is spring differential pressure delta a, delta a=F/S, F is the elasticity of the spring 10, S is the area of the first pressing sheet, and delta PG= delta P+ [ delta a ].
The guide rod device 11 is provided with a second pressing sheet, the second pressing sheet is arranged below the first pressing sheet, a second diaphragm 13 is fixed on the second pressing sheet, two ends of the second diaphragm 13 are propped against the inner wall of the differential pressure proportional valve 1, two gas mixture pressure taking pipes 15 are respectively arranged on the upper side and the lower side of the first pressing sheet 12, two gas mixture pressure taking pipes 14 are respectively arranged on the upper side and the lower side of the second pressing sheet 13, the areas of the first pressing sheet and the second pressing sheet are equal, the pressure generated by the gas mixture differential pressure delta PG at the second pressing sheet 13 is equal to the sum of the pressure generated by the gas mixture differential pressure delta P at the first pressing sheet 12 and the pressure of the spring 10, so that the differential pressure proportional valve 1 is in a balanced state, and the middle connecting rod is in a stress balanced state. When the equilibrium state is broken, for example, when the gas mixture differential pressure Δp becomes large, Δpg does not equal Δp+Δa, the downward pressure applied to the first press sheet 12 by the gas mixture differential pressure becomes large, the spring 10 is deformed by stretching, and since the difference between the gas mixture differential pressure Δpg and the gas mixture differential pressure Δp is fixed, in order to ensure that the spring 10 returns to its original state, the valve 16 on the differential pressure proportional valve 1 is regulated so as to increase the gas flow, the gas differential pressure Δpg is increased along with the increase of the upward pressure generated by the gas differential pressure at the second pressing piece 13, and the guide rod device 11 automatically restores the compression of the spring 10 to the original state by upward movement to continuously maintain the differential pressure Δa of the spring 10, so that Δpg= Δp+ [ delta ] a.
The upper end of the balance adjusting device 9 is vertically arranged in the differential pressure proportional valve 1, the upper end of the balance adjusting device 9 is connected with the differential pressure proportional valve 1 through threads, and the balance adjusting device 9 can be screwed in or out by an adjusting screw driver 8, so that the spring 10 and the first pressing piece 12 are driven to corresponding positions, the spring 10 and the first pressing piece 12 reach corresponding spring pressure balance points according to corresponding burner power, and the ΔPG= ΔP+ [ delta ] a is ensured. If ΔPG is not equal to ΔP+Δa, the differential pressure proportional valve 1 automatically adjusts the gas flow through the first pressing sheet 12 and the guide rod device 11, and the gas differential pressure and the gas mixture differential pressure keep the corresponding numerical value difference relationship, so that the gas flow and the gas mixture flow are kept stable.
Because the values of delta a under different power conditions have certain difference, after the rotating speed of the fan 5 is regulated, the position of the balance regulating device 9 can be regulated by regulating the screw driver 8, so that the balance regulating device 9 reaches the position of the spring pressure balance point under the reset power value, and the gas flow is further regulated by the differential pressure proportional valve 1. When the combustion power of the burner needs to be increased, the rotating speed of the fan 5 is increased, at the moment, the flow rate and the flow velocity of the mixed gas are increased, the differential pressure DeltaP of the mixed gas generated after passing through the mixed gas orifice plate 6 is increased, at the moment, in order to ensure DeltaPG= DeltaP+ Deltaa, the differential pressure proportional valve 1 can automatically adjust the gas flow, increase the differential pressure DeltaPG of the gas, and ensure the stability of combustion.
The air-fuel ratio case mixer is characterized in that a gas orifice plate 2 is arranged in a gas pipeline, a mixed gas orifice plate 6 and a fan 5 are arranged in an air pipeline, air holes or orifices are arranged on the gas orifice plate 2 and the mixed gas orifice plate 6, so that the flow rate of gas and air is increased after passing through the gas orifice plate 2 and the mixed gas orifice plate 6 respectively, the pressure is reduced, differential pressure is generated at two sides of the gas orifice plate 2 and the mixed gas orifice plate 6 respectively, namely, the pressure difference is larger, the differential pressure is measured through the differential pressure proportional valve 1, the gas differential pressure ΔPG at two sides of the gas orifice plate 2 and the mixed gas differential pressure ΔP at two sides of the mixed gas orifice plate 6 are measured, meanwhile, the spring 10 in the differential pressure proportional valve 1 also generates spring differential pressure Δa for the first pressing piece 12, and the differential pressure ΔPG of the mixed gas is in a balanced state when the sum of the differential pressure ΔP of the spring and the differential pressure ΔPG of the gas is equal, and when the differential pressure ΔPG of the gas differential pressure is changed, the differential pressure proportional valve 1 automatically adjusts the gas flow, and the gas differential pressure is ensured to keep the gas differential pressure and the mixed gas flow at a certain quantity and the stable and the required gas flow ratio to be stable around the air-fuel ratio.
Example 2
This embodiment only describes differences from the above-described embodiment, and the remaining technical features are the same as those of the above-described embodiment. In this embodiment, a unidirectional air valve is disposed at a position where the gas pipe is connected to the air pipe. The one-way gas valve prevents the reverse flow of gas and air from the air conduit back to the gas conduit.
Example 3
This embodiment only describes differences from the above-described embodiment, and the remaining technical features are the same as those of the above-described embodiment. In this embodiment, at least one group of gas hole arrays distributed in a circular shape is disposed on the gas hole plate 2 around the center of the gas hole plate 2, and each gas hole array is provided with a plurality of gas holes with the same diameter and uniformly distributed around the center of the gas hole plate, and the gas holes on different groups of gas hole arrays have the same aperture in the direction from the center of the gas hole plate to the peripheral surface. The fuel gas is accelerated, subdivided, redirected and diffused after passing through the fuel gas holes. The gas can be mixed with air in the air pipeline as soon as possible, and meanwhile, a plurality of gas flows are crossed with air in the mixing process and are mixed in a layered manner, so that the gas and the air are mixed for a plurality of times, the uniformity of mixing the gas and the air is improved, the gas is combusted more fully, the waste of the gas and the generation of harmful gas are reduced, and the energy-saving and environment-friendly effects are realized.
At least one group of mixed air hole arrays which are distributed circularly are arranged on the mixed air hole plate 6 around the center of the mixed air hole plate 6, a plurality of mixed air holes which are identical in diameter and uniformly distributed around the center of the mixed air hole plate 6 are arranged on each mixed air hole array, the holes of the mixed air holes on the mixed air hole arrays in different groups are gradually increased from the center of the mixed air hole plate 6 to the peripheral direction. Therefore, the mixed gas can form a plurality of mixed gas flows through the mixed gas pore plate 6, so that the inner gas flow close to the center of the burner nozzle of the burner is small, the ignition is facilitated, the gas is not easy to blow out by stronger gas flow, and the ignition reliability is improved.
Example 4
This embodiment only describes differences from the above-described embodiment, and the remaining technical features are the same as those of the above-described embodiment. In this embodiment, the air-mixing hole plate 6 is curved from the circumferential surface to the center toward the air outlet end of the air duct by a certain radian, that is, the center of the air-mixing hole plate 6 and the circumferential edge of the air-mixing hole plate 6 are on different sections, and the center point of the air-mixing hole plate 6 is closer to the air outlet end of the air duct. The center of the gas mixture pore plate 6 is bent by a certain radian to facilitate the gas mixture formed by the gas and the air to play a role in converging after passing through the gas mixture pore, the horizontal entering direction of the gas mixture is changed, the gas mixture is accelerated, subdivided and redirected, and the gas mixture is converged towards the central axis of the air pipeline, so that the gas mixture is fully converged near the central axis of the combustion head, and the phenomenon of insufficient air flow dispersion combustion is prevented.
Example 5
This embodiment only describes differences from the above-described embodiment, and the remaining technical features are the same as those of the above-described embodiment. In this embodiment, two gas orifice plates 2 are disposed in the gas orifice plate valve, two gas orifice plates 6 are disposed in the gas orifice plate valve, one or more gas orifice arrays disposed in parallel with each other are disposed on the gas orifice plate 2, each gas orifice array is disposed with a plurality of gas orifices arranged in a linear manner, the distance between two groups of gas orifice arrays is greater than the aperture of the gas orifice, one gas orifice plate 2 is fixed in the cavity of the gas orifice plate valve, the other gas orifice plate 2 is in close contact with the fixed gas orifice plate 2 for lifting movement, the gas orifice plate 2 between the gas orifice arrays in the moving gas orifice plate 2 can seal the gas orifice on the fixed gas orifice plate 2, and the aperture of the gas orifice on the fixed gas orifice plate 2 is adjusted;
two gas mixture pore plates 6 are arranged in the gas mixture pore plate valve, one or more gas mixture pore arrays which are arranged in parallel are arranged on the gas mixture pore plate 6, a plurality of gas mixture pores which are arranged in a linear mode are arranged on each gas mixture pore array, the distance between the two groups of gas mixture pore arrays is larger than the aperture of the gas mixture pore, one gas mixture pore plate 6 is fixed in the cavity of the gas mixture pore plate valve, the other gas mixture pore plate 6 is in lifting motion closely to the fixed gas mixture pore plate 6, the gas mixture pore plate 6 between the gas mixture pore arrays in the moving gas mixture pore plate 6 can seal the gas mixture pore on the fixed gas mixture pore plate 6, and the aperture of the gas mixture pore on the fixed gas mixture pore plate 6 is adjusted.
Variations and modifications to the above would be obvious to persons skilled in the art to which the invention pertains from the foregoing description and teachings. Therefore, the invention is not limited to the specific embodiments disclosed and described above, but some modifications and changes of the invention should be also included in the scope of the claims of the invention. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not constitute any limitation on the invention.
Claims (5)
1. An air-fuel ratio example mixer comprises a gas pipeline, an air pipeline, a proportional valve and a gas burner, wherein the gas outlet end of the gas pipeline is connected with the air pipeline, the proportional valve is connected with the gas inlet end of the gas pipeline, the gas outlet end of the air pipeline is connected with the gas burner,
the gas pipeline is internally provided with a gas pore plate, the air pipeline is internally provided with a mixed gas pore plate and a fan, the mixed gas pore plate is arranged on the inner side of the air outlet end close to the air pipeline, the fan is arranged between the mixed gas pore plate and the air inlet end of the air pipeline, and the position where the air outlet end of the gas pipeline is connected with the air pipeline is positioned between the air inlet end of the air pipeline and the fan;
the proportional valve is a differential pressure proportional valve, two gas pressure taking pipes and two gas mixture pressure taking pipes are arranged on the differential pressure proportional valve, gas pressure taking points are arranged on two sides of the gas orifice plate, gas mixture pressure taking points are arranged on two sides of the gas mixture orifice plate, one ends of the two gas pressure taking pipes are respectively connected to the gas pressure taking points on two sides of the gas orifice plate, and one ends of the two gas mixture pressure taking pipes are respectively connected to the gas mixture pressure taking points on two sides of the gas mixture orifice plate;
the two gas pressure taking pipes are matched with the differential pressure proportional valve to measure the gas differential pressure delta PG at two sides of the gas orifice plate, and the two gas pressure taking pipes are matched with the differential pressure proportional valve to measure the gas differential pressure delta P at two sides of the gas orifice plate;
the differential pressure proportional valve is provided with a balance adjusting device and a guide rod device, a spring and a first pressing sheet are arranged between the balance adjusting device and the guide rod device, the upper end of the spring is connected with the lower end of the balance adjusting device, the lower end of the spring is connected with the first pressing sheet, the upper end of the balance adjusting device is provided with a groove matched with a screw driver, and the height position of the balance adjusting device is adjusted through the screw driver;
the pressure of the spring generated by the spring on the first pressing sheet is spring differential pressure delta a, and delta PG= delta P plus delta a;
the centers of the gas orifice plate and the mixed gas orifice plate are provided with an orifice for the gas and the air to pass through respectively;
the gas pore plate and the mixed gas pore plate are respectively arranged on the gas pore plate valve and the mixed gas pore plate valve, and the gas pore plate valve and the mixed gas pore plate valve are respectively arranged on the gas pipeline and the air pipeline.
2. An air-fuel ratio example mixer according to claim 1, characterized in that an air filter screen and an air butterfly valve are provided in this order inside the air intake end of the air duct.
3. An air-fuel ratio example mixer according to claim 1, characterized in that a one-way air valve is provided at a position where said gas pipe is connected to said air pipe.
4. The air-fuel ratio example mixer according to claim 1, wherein at least one group of gas hole arrays distributed in a circular shape is arranged on the gas hole plate around the center of the gas hole plate, a plurality of gas holes with the same diameter and uniformly distributed around the center of the gas hole plate are arranged on each gas hole array, and the diameters of the gas holes on different groups of gas hole arrays are equal in the direction from the center of the gas hole plate to the peripheral surface.
5. The air-fuel ratio mixer according to claim 1, wherein at least one group of mixing air hole arrays which are distributed circularly are arranged on the mixing air hole plate around the center of the mixing air hole plate, a plurality of mixing air holes which have the same diameter and are uniformly distributed around the center of the mixing air hole plate are arranged on each mixing air hole array, the diameters of the mixing air holes on the mixing air hole arrays of different groups are gradually increased from the center of the mixing air hole plate to the peripheral surface direction.
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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 CN109442405A (en) | 2019-03-08 |
| CN109442405B true CN109442405B (en) | 2023-12-05 |
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| 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 |
| CN112128984B (en) * | 2019-06-25 | 2024-04-16 | 芜湖美的厨卫电器制造有限公司 | Gas adjusting device of gas water heater and gas water heater with same |
| 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 |
| 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 |
| 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 |
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| CA3192044A1 (en) * | 2022-03-08 | 2023-09-08 | Bertelli & Partners S.R.L. | Device and method for controlling a fuel-oxidizer mixture for a premix gas burner |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB454982A (en) * | 1935-06-18 | 1936-10-12 | Josef Heinrich Reineke | Improvements in or relating to flow proportioning means |
| GB1169172A (en) * | 1965-09-24 | 1969-10-29 | South Eastern Gas Board | Improvements relating to the Control of Gas Flame Characteristics |
| GB1223337A (en) * | 1967-05-15 | 1971-02-24 | Tokyo Gas Co Ltd | An air-gas flow device for burners |
| DE2412720A1 (en) * | 1974-03-16 | 1975-09-25 | Gerlach Werke Gmbh | DEVICE FOR ADJUSTING AND AUTOMATICALLY REGULATING THE MIXING RATIO OF A GAS-AIR MIXTURE |
| EP0015480A2 (en) * | 1979-03-02 | 1980-09-17 | Ruhrgas Aktiengesellschaft | Device for the regulation of gas-firing mixtures |
| JPS58224228A (en) * | 1982-06-21 | 1983-12-26 | Matsushita Electric Ind Co Ltd | Combustion control device |
| JPH0367917A (en) * | 1989-08-05 | 1991-03-22 | Eiken Kogyo Kk | Gas burner |
| FR2770789A1 (en) * | 1997-11-07 | 1999-05-14 | Gaz De France | UNIVERSAL MIXING DEVICE OF TWO GASEOUS FLUIDS |
| EP1635117A1 (en) * | 2004-09-14 | 2006-03-15 | A. Theobald S.A. | Method for regulating the air/fuel ratio of a burner and burner using this method |
| KR20100105229A (en) * | 2009-03-20 | 2010-09-29 | 주식회사 진성에너텍 | Combustor for various testing capability and durability of tubocharger and combustion control system including thereof |
| CN104266223A (en) * | 2014-09-28 | 2015-01-07 | 力聚热力设备科技有限公司 | Gas control device for controlling air-fuel ratio of burning through air flow meter |
| CN104728842A (en) * | 2015-02-06 | 2015-06-24 | 宁波市甬深电器有限公司 | Forced full-premixing fuel gas combustion device enabling fuel gas to be completely combusted |
| CN106838977A (en) * | 2017-03-24 | 2017-06-13 | 叁叁伍贰新能源科技(北京)有限公司 | The mixed sky hydrocarbon gas gas system of combustor dedicated full-automatic |
| CN106958812A (en) * | 2016-01-12 | 2017-07-18 | 帕饰克股份有限公司 | AIR Proportional controller for gas burner |
| CN206904977U (en) * | 2017-06-06 | 2018-01-19 | 佛山市顺德区奇林电气有限公司 | The combustion gas of regulation stability of flow and precision passes through adjusting means |
| CN207815380U (en) * | 2018-01-29 | 2018-09-04 | 东莞市茂裕工业窑炉有限公司 | A kind of novel gas flow is precisely controlled combustion system |
| CN209415450U (en) * | 2018-12-26 | 2019-09-20 | 广州威茨热能技术有限公司 | A kind of air-fuel ratio mixer |
-
2018
- 2018-12-26 CN CN201811603781.8A patent/CN109442405B/en active Active
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB454982A (en) * | 1935-06-18 | 1936-10-12 | Josef Heinrich Reineke | Improvements in or relating to flow proportioning means |
| GB1169172A (en) * | 1965-09-24 | 1969-10-29 | South Eastern Gas Board | Improvements relating to the Control of Gas Flame Characteristics |
| GB1223337A (en) * | 1967-05-15 | 1971-02-24 | Tokyo Gas Co Ltd | An air-gas flow device for burners |
| DE2412720A1 (en) * | 1974-03-16 | 1975-09-25 | Gerlach Werke Gmbh | DEVICE FOR ADJUSTING AND AUTOMATICALLY REGULATING THE MIXING RATIO OF A GAS-AIR MIXTURE |
| EP0015480A2 (en) * | 1979-03-02 | 1980-09-17 | Ruhrgas Aktiengesellschaft | Device for the regulation of gas-firing mixtures |
| JPS58224228A (en) * | 1982-06-21 | 1983-12-26 | Matsushita Electric Ind Co Ltd | Combustion control device |
| JPH0367917A (en) * | 1989-08-05 | 1991-03-22 | Eiken Kogyo Kk | Gas burner |
| FR2770789A1 (en) * | 1997-11-07 | 1999-05-14 | Gaz De France | UNIVERSAL MIXING DEVICE OF TWO GASEOUS FLUIDS |
| EP1635117A1 (en) * | 2004-09-14 | 2006-03-15 | A. Theobald S.A. | Method for regulating the air/fuel ratio of a burner and burner using this method |
| KR20100105229A (en) * | 2009-03-20 | 2010-09-29 | 주식회사 진성에너텍 | Combustor for various testing capability and durability of tubocharger and combustion control system including thereof |
| CN104266223A (en) * | 2014-09-28 | 2015-01-07 | 力聚热力设备科技有限公司 | Gas control device for controlling air-fuel ratio of burning through air flow meter |
| CN104728842A (en) * | 2015-02-06 | 2015-06-24 | 宁波市甬深电器有限公司 | Forced full-premixing fuel gas combustion device enabling fuel gas to be completely combusted |
| CN106958812A (en) * | 2016-01-12 | 2017-07-18 | 帕饰克股份有限公司 | AIR Proportional controller for gas burner |
| CN106838977A (en) * | 2017-03-24 | 2017-06-13 | 叁叁伍贰新能源科技(北京)有限公司 | The mixed sky hydrocarbon gas gas system of combustor dedicated full-automatic |
| CN206904977U (en) * | 2017-06-06 | 2018-01-19 | 佛山市顺德区奇林电气有限公司 | The combustion gas of regulation stability of flow and precision passes through adjusting means |
| CN207815380U (en) * | 2018-01-29 | 2018-09-04 | 东莞市茂裕工业窑炉有限公司 | A kind of novel gas flow is precisely controlled combustion system |
| CN209415450U (en) * | 2018-12-26 | 2019-09-20 | 广州威茨热能技术有限公司 | A kind of air-fuel ratio mixer |
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