EP2603738A1 - Mixing device for mixing combustion air and gas, and firing device - Google Patents
Mixing device for mixing combustion air and gas, and firing deviceInfo
- Publication number
- EP2603738A1 EP2603738A1 EP11730250.5A EP11730250A EP2603738A1 EP 2603738 A1 EP2603738 A1 EP 2603738A1 EP 11730250 A EP11730250 A EP 11730250A EP 2603738 A1 EP2603738 A1 EP 2603738A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- nozzle
- seal
- mixing device
- gas inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
- F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K5/00—Feeding or distributing other fuel to combustion apparatus
- F23K5/002—Gaseous fuel
- F23K5/007—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2400/00—Pretreatment and supply of gaseous fuel
- F23K2400/20—Supply line arrangements
Definitions
- Mixing device for mixing combustion air and gas as well
- the invention relates to a mixing device for premixing combustion air and gas with a device for gas supply having a gas outlet and a nozzle, wherein on the nozzle or a nozzle disposed on the bypass element, a gas inlet is provided and the gas path from the gas outlet to the gas inlet through a is sealed from the gas outlet to the gas inlet extending seal. Furthermore, the invention relates to a firing device with a gas burner with a combustion chamber, a blower and a mixing device, wherein the mixture of combustion air and gas provided by the mixing device is supplied to the combustion chamber of the gas burner by means of the blower.
- a gas burner with a combustion chamber
- a blower and a mixing device
- a gas inlet is provided on the nozzle or a bridging element disposed on the nozzle, and the gas path is sealed from the gas outlet to the gas inlet by a gasket extending from the gas outlet to the gas inlet.
- a gas inlet nozzle can be provided on the nozzle or a bridging element to the nozzle, wherein a seal is provided which seals against the gas inlet nozzle on the outside or inside over a predetermined axial length and the gas path from the gas outlet to the nozzle or the bridging element seals.
- a device for Gas supply can be used here a gas control device.
- the gas control may also be located at the nozzle or in front of the gas valve and the gas supply device may be a (safety) gas valve.
- any training is understood to which a seal can be brought to Ansel, wherein a gas inlet nozzle can be formed in a corresponding training in the interior of the nozzle or the bridging element as a wall.
- gas control device is defined as any device capable of providing the gas provided by the gas line in desired amounts.
- Nozzle means any component that fluidly mixes combustion air with gas within a housing, i. General mixing devices even without “nozzle function” are also included.
- Gas path is understood to be the flow path of the gas.
- the “gas outlet” is determined by an area at which the gas leaves the gas regulator or the gas valve Even though embodiments with gas control device are described below, it goes without saying that the gas valve can also be used for this purpose in all versions. The gas flow control then takes place, for example, at the nozzle.
- the gas inlet nozzle can be arranged indirectly via a bridging element on the nozzle. It is therefore not necessary to form the gas inlet nozzle directly to the nozzle, but the bridging element can take any shape and bridge any distances between the gas regulator and the nozzle. In a preferred embodiment, the gas inlet nozzle protrudes outward beyond an edge plane of the nozzle or the bridging element, so that the seal can be brought into contact with the nozzle on the outside or on the inside.
- any design of the nozzles is understood to mean that in which a portion of the respective nozzle over an edge plane of the component, on which the nozzle is arranged protrudes.
- a gas path is provided from the gas control valve to the nozzle, wherein the gas inlet can be arranged on the bridging element so that it is substantially aligned with the gas outlet of the gas control valve and axially protrudes from a peripheral plane of the bridging element.
- the invention includes the possible alternatives to provide the gas control device either an additional gas outlet, the outside is at least partially enclosed by the seal, or form the gas outlet on the gas control device as an outlet and the gasket seal inside to secure the gas outlet.
- the gas outlet nozzle is saved and the manufacturing costs as well as the assembly time are reduced.
- the gasket can be arranged either on the outside or on the inside.
- the gas outlet nozzle and the gas inlet nozzle each may be substantially tubular and formed with substantially identical diameters, so that the seal can surround the respective nozzle surface fitting.
- the gasket which is fixed in its diameter, acts with substantially identical forces on the outer surfaces of the nozzles in such a favorable design.
- substantially tubular also includes oval formations the opposite tubular nozzle.
- the gas outlet and gas inlet ports are arranged in a manner that their respective axially facing axial outer edges are spaced apart, the distance being preferably between 0.5 and 3 mm, more preferably between 1 and 2 mm, even more preferably 1 mm.
- the direction in which the gas outlet nozzle and the gas inlet nozzle face one another is generally defined as "axial"
- the bridging element is formed by the gasket itself
- the spacing of the outer edges enables a flexible arrangement of the components which, although A certain offset of the sockets can be compensated by the elasticity of the gasket, however, the distance of the sockets is chosen as small as possible, so that the gas flow from the gas outlet
- the nozzles can be arranged butting, whereby the best aerodynamic result is achieved, however, nevertheless a radial freedom of movement is given
- Ven training may be intentionally offset between the gas outlet or gas outlet and gas inlet, which can be compensated via the seal.
- the seal may be formed as a preformed seal, which compensates for the corresponding offset of several centimeters. Smaller tolerances are additionally possible by the elasticity of the sealing material, preferably silicone, NBR or EPDM. In addition to elasticity, these materials have the compelling advantage of being gas-resistant.
- a simple adhesive bond between the outer surface Chen the neck and the inside of the seal or the inner surface of the gas outlet and the gas inlet nozzle and the outer surfaces of the seal may be provided.
- the sockets have in their outwardly projecting portions on outside lamellae or external ogewinde, can engage in the corresponding recesses of the seal on the inside or an internal thread.
- the lamellae or the thread can be provided correspondingly on the inside on the gas outlet or the gas inlet stub.
- Such attachment is advantageous because it prevents slipping of the seal on the one hand, but at the same time a high gas tightness is ensured with a releasably secured seal.
- the respective projecting portion of the neck can be between 4 and 50 mm long, in a preferred embodiment between 25 and 30 mm long, in order to ensure a sufficient contact surface, so that the gas-tightness between seal and neck is guaranteed.
- the axial length of the seal can be greater than the length between the gas regulator and the nozzle or bridging element to be bridged length, so that the seal forms a bead in its axial central region.
- This additional material of the seal in the axial direction ensures the ability to compensate for relative movements of the gas control device relative to the nozzle or the bridging element, so that a seal is ensured, even if the nozzles are not arranged exactly in alignment.
- the axial length of the seal may further be formed such that at least one, but preferably both of the axial end portions of the seal on the respective subsequent assembly (gas regulator, nozzle, bridging element) is applied. In this way, on the one hand additional sealing surfaces are created in the radial direction, on the other hand experiences the seal always a compression in the axial direction, so that unintentional release is excluded.
- the gas outlet can be releasably attached to the gas regulator and the gas inlet nozzle releasably secured to the nozzle or the bridging element, but alternatively, the nozzles can also be an integral part of these units.
- the detachable arrangement can be realized for example by a screw. It is advantageous in terms of mounting capability, since the individual components can be prepared and assembled independently. An integral construction, for example, in that the respective nozzle is injection-molded directly onto the component with, shortens the assembly, since additional attachment steps of the nozzle on the respective unit omitted.
- an aperture can additionally be arranged in the gas path from the gas regulator to the nozzle or the bridging element, which limits the amount of gas flow.
- liquid gas can also be provided by gas control devices.
- gas control devices For example, in new buildings, the heating is often installed very early in the construction process, so that first liquefied gas and later natural gas can be fired. Liquefied gas, however, is so highly caloric that the amount supplied via the gas regulator must be limited.
- One solution would be to adjust the gas control unit according consuming, but what special knowledge of the installer are necessary. According to the invention, therefore, a diaphragm arranged in the gas path is proposed which has a reduced cross-section and thus limits the gas flow in a predefined manner.
- the aperture When switching to natural gas, the aperture can be easily removed.
- the panel on the outside may be surrounded by the seal, so that a seal of the gas path in this area can be provided with a single seal and its sealing surfaces to the gas outlet and the gas inlet nozzle.
- the aperture can be inserted into the seal, knotted or injected beforehand.
- the bezel is formed as a disk with an internal hole that can be placed in any direction within the gasket. The bezel can be included in the initial installation of the gas control unit to be able to easily, inexpensively and quickly mounted to realize a conversion to LPG. Special knowledge of the installer is not necessary.
- the seal may be formed with a projection which in the assembled state can press against a flange section of the panel and thus fix it in the gas inlet connection.
- the gas inlet into the nozzle is thus defined limited.
- the bezel is fixed in the components and can be pre-inserted into the gas inlet nozzle or gasket for easier installation. Handling for the installer is thus once again simplified.
- the gas control device and the nozzle are held on a holding device such that the seal remains free from external forces during operation of the firing device.
- the gas control device and the nozzle on the holding device, for.
- Claim 16 further determines the firing device comprising a mixing device according to the invention.
- the dimensions given here are, for example, by measuring means Caliper verifiable.
- Fig. 1 is a sectional view of the transition from the gas outlet to the
- Fig. 2 is a sectional view of the transition from the gas outlet to a
- Fig. 3 is a sectional view of a transition from the gas outlet to the
- Fig. 4. is a sectional view of a transition with aperture
- Fig. 6. a sectional view of the transition from the gas outlet to a
- Fig. 1 is a detail view of the mixing device according to the invention, in which a gas control device 1 and a nozzle 3, in particular a venturi, are provided.
- a gas control device 1 On the way to the burner in the nozzle 3, the supplied from the gas control device or the gas valve 1 (hereinafter referred to only as a gas control device) provided in a predetermined amount of gas with ambient air.
- the gas control device 1 has at the gas outlet 2 on a built-in gas control device 1 tubular gas outlet 7, which protrudes in the axial direction to the nozzle 3 outwards.
- a gas inlet 2 'in the form of a gas inlet nozzle 5 is provided, which is connected via a peripheral level of the nozzle 3 in the axial direction protrudes outward.
- the gas inlet nozzle 5 is screwed into the nozzle 3 and thus releasably secured thereto.
- the gas inlet 5 can be integrally integrated in the nozzle 3.
- a seal 6 is provided which sealingly surrounds the gas outlet port 7 and the gas inlet port 5 on the outside over a predetermined axial length and seals the gas path from the gas outlet 2 of the gas control device 1 to the nozzle 3.
- the nozzle 5, 7 may have a smooth surface, so that the seal 6 is easily pushed. An additional attachment of the seal 6 is not necessary, since the fixed positioning of the gas regulator 1 and the nozzle 3 causes the outer seal 6 to act on the seal.
- the sockets 5, 7 are axially spaced to ensure the greatest possible tolerance compensation of the components to each other.
- the axial length of the seal 6 is greater than the distance between the gas control device 1 and the nozzle 3, so that the seal forms a bead 11.
- This additional material ensures on the one hand a simple installation, on the other hand, the axial end portions of the seal 6 are brought to the gas control device 1 and the nozzle 3 with an edge-contact surface 10 for concern. In this way, in addition to a secure attachment creates an additional seal on the radially extending surfaces.
- the seal 6 may additionally be attached to the nozzle 5, 7 by means of adhesive.
- FIG. 2 an alternative arrangement is shown, in which the gas inlet nozzle 5 is arranged on a bridging element 4, which is in direct connection to the nozzle 3.
- the sockets 5, 7 are shown with a small distance in the axial direction, but may also be in abutment with each other.
- the seal 6 is in each case pushed on the outside over the outwardly projecting portions of the connecting pieces 5, 7.
- the seal 6 rests with its axial end portion on the bridging element 4, so that axial edge contact surfaces 10 are ensured.
- the seal 6 has at its axial end portion in the region of the gas inlet nozzle 5 a plurality of, in the example shown, three mutually axially spaced bearing surfaces 9, formed by the fact that run inside the seal two full recesses.
- the gas outlet connection 7 has lamellae 8, into which corresponding recesses on the inside of the seal 6 engage.
- the seal 6 is pushed over the fins 8, so that a latching connection with sealing bearing surfaces 9 between the fins 8 and the recesses of the seal 6 is ensured.
- only two fins 8 are shown schematically, but the connection can also be ensured by a plurality of such fins and a corresponding plurality of recesses.
- the gas outlet port 7 and the gas inlet port 5 are each formed tubular with identical diameters, so that the gas path from the gas control device 1 to the bridging element 4 and the nozzle 3 is favorable in terms of flow.
- Fig. 3 a further alternative embodiment is shown, wherein the seal 6 is internally sealed to the gas outlet 2 of the gas control device 1. As attachment serves a% inch threaded connection, the seal 6 is screwed into the gas outlet of the gas control device until it abuts with its axial end to the gas regulator and forms a radial sealing surface 10 in addition to the seal on the thread.
- the gas inlet nozzle 5 at the gas inlet 2 ' which can be arranged arbitrarily on a bridging element 4 or a nozzle 3, has a radial distance (offset) v to the gas outlet 2.
- the distance v may be several cm, so that the seal 6 is formed as a preformed seal, which bridges the distance v via a sloping section and is just connected to the gas inlet 5. If the orientation of the seal 6 to the nozzle 3 is not correct, the seal 6 can be rotated over the thread until it fits axially into the gas inlet 5 of the nozzle 3.
- the axial end portion of the seal 6 is sealingly secured on the inside of the gas inlet 5, wherein optionally one of the above-described fins, threads or adhesive joints ge can be chosen.
- a development of the invention is shown, wherein in the gas path of the gas control device 1 to the nozzle 3, a diaphragm 12 is arranged, which has a relation to the nozzle 5, 7 reduced cross-section.
- the panel is surrounded on the outside by the seal 6.
- the aperture 12 is inserted into the gas inlet nozzle 5, but it may also be made shorter and be held exclusively by the seal 6.
- the flange portion of the aperture 12 is buttoned into a recess of the seal 6.
- Fig. 5 discloses an alternative embodiment of the arrangement of a diaphragm 12, wherein the seal 6 is formed with a projection 13 which presses against the flange portion of the aperture 12 and thus fixed to the gas inlet port 5 of the bridging element 4 (or nozzle 3).
- the diaphragm 12 is with its part opposite the flange portion in the gas inlet nozzle
- Fig. 6 shows an alternative embodiment of the solution according to FIG. 2, wherein the seal 6 is arranged on the gas control device 1 according to FIG.
- the bridging element 4 is bridged from the gas outlet 2 of the gas regulating device to the gas inlet 2 'of the bridging element 4, the nozzle 3 (not shown, but as in the embodiment according to FIG 5) is directly in fluid communication with the bridging element 4.
- the seal 6 encloses the bridging element 4 on both sides, wherein the respective ends of the seal 6 surround the outer edges of the bridging element 4.
- the seal is asymmetrical and thus ensures an arrangement over the entire outer edge of the bridging element 4. Der Gas path from the gas outlet 2 to the gas inlet 2 'is thus completely formed and sealed by the seal 6 in this embodiment.
- the gas control device 1 and the nozzle 3 are arranged on a holding device, not shown, such that the seal 6 is free from external forces and stresses after assembly.
- the invention further includes a firing device with a gas burner, which has a combustion chamber, a blower and a mixing device, which comprises the described gas control device and the described nozzle and the corresponding connection of the components.
- a firing device with a gas burner which has a combustion chamber, a blower and a mixing device, which comprises the described gas control device and the described nozzle and the corresponding connection of the components.
- the invention is not limited in its execution to the above-mentioned preferred embodiments. Rather, a number of variants is conceivable, which makes use of the illustrated solution even with fundamentally different types of use.
- the seal may be glued to a nozzle in addition to a catch with slats.
- the features described for one embodiment are also applicable in other embodiments as far as technically possible.
- a lamellar connection according to FIG. 2 can also be used in the embodiment according to FIG.
- a design of the gas inlet nozzle 5 through the inner wall of the nozzle 3 and the bridging element 4 is also included for all versions.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010034255 | 2010-08-13 | ||
DE102010036100A DE102010036100A1 (en) | 2010-08-13 | 2010-09-01 | Mixing device for mixing combustion air and gas and firing device |
PCT/EP2011/060515 WO2012019818A1 (en) | 2010-08-13 | 2011-06-22 | Mixing device for mixing combustion air and gas, and firing device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2603738A1 true EP2603738A1 (en) | 2013-06-19 |
EP2603738B1 EP2603738B1 (en) | 2016-11-16 |
Family
ID=44628150
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11730250.5A Active EP2603738B1 (en) | 2010-08-13 | 2011-06-22 | Mixing device for mixing combustion air and gas, and firing device |
Country Status (4)
Country | Link |
---|---|
US (1) | US9410697B2 (en) |
EP (1) | EP2603738B1 (en) |
DE (2) | DE102010036100A1 (en) |
WO (1) | WO2012019818A1 (en) |
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-
2010
- 2010-09-01 DE DE102010036100A patent/DE102010036100A1/en not_active Ceased
- 2010-09-01 DE DE202010018527.0U patent/DE202010018527U1/en not_active Expired - Lifetime
-
2011
- 2011-06-22 US US13/816,596 patent/US9410697B2/en active Active
- 2011-06-22 EP EP11730250.5A patent/EP2603738B1/en active Active
- 2011-06-22 WO PCT/EP2011/060515 patent/WO2012019818A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
US20130149654A1 (en) | 2013-06-13 |
DE102010036100A1 (en) | 2012-02-16 |
EP2603738B1 (en) | 2016-11-16 |
WO2012019818A1 (en) | 2012-02-16 |
DE202010018527U1 (en) | 2017-05-29 |
US9410697B2 (en) | 2016-08-09 |
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