EP2083217B1 - Brûleur à gaz pour une chaudière - Google Patents

Brûleur à gaz pour une chaudière Download PDF

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Publication number
EP2083217B1
EP2083217B1 EP20080425004 EP08425004A EP2083217B1 EP 2083217 B1 EP2083217 B1 EP 2083217B1 EP 20080425004 EP20080425004 EP 20080425004 EP 08425004 A EP08425004 A EP 08425004A EP 2083217 B1 EP2083217 B1 EP 2083217B1
Authority
EP
European Patent Office
Prior art keywords
support plate
connection portion
diffuser
gas burner
distributor
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.)
Ceased
Application number
EP20080425004
Other languages
German (de)
English (en)
Other versions
EP2083217A1 (fr
Inventor
Luca Barozzi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beckett Thermal Solutions SRL
Original Assignee
Worgas Bruciatori SRL
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Worgas Bruciatori SRL filed Critical Worgas Bruciatori SRL
Priority to EP20080425004 priority Critical patent/EP2083217B1/fr
Publication of EP2083217A1 publication Critical patent/EP2083217A1/fr
Application granted granted Critical
Publication of EP2083217B1 publication Critical patent/EP2083217B1/fr
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—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
    • F23D14/10—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 with elongated tubular burner head
    • 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
    • F23D14/10—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 with elongated tubular burner head
    • F23D14/105—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 with elongated tubular burner head with injector axis parallel to the burner head axis

Definitions

  • the present invention relates to a gas burner for a boiler.
  • Prior art gas boilers comprise a support plate which is connectable to a combustion chamber of the boiler in order to ensure the closing of the chamber and the positioning of the burner in relation to such combustion chamber.
  • the support plate defines an opening for the passage of a premixed gas-air mixture from an outer side to an inner side of the same plate.
  • a duct for supplying the burner with the premixed gas-air mixture can be connected at the passage opening.
  • the connection between the supply duct and the support plate is carried out by means of a plurality of screws and through the interposition of a gasket.
  • the burner further comprises a diffuser through which the fuel-air premixed gas which determines a flame pattern for the generation of heat is conveyed.
  • the diffuser comprises a wall provided with a plurality of small holes and having an inner side in flow connection with the supply duct, and an outer side on which the combustion takes place.
  • a distribution device can be further provided, typically a wall with a plurality of through holes, so configured as to distribute the gas-air mixture towards the diffuser wall in an essentially even manner or, however, in the desired manner.
  • the diffuser and the distributor are rigidly connected to the support plate, in particular on the inner side thereof, so that, once the burner has been assembled, the diffuser projects into the boiler combustion chamber, and the supply duct extends outside the latter.
  • connection flange For the connection of the diffuser and the distributor to the support plate, a so-called stainless steel connection flange is provided.
  • the connection flange is manufactured independently from the support plate, and it is connectable thereto by means of a plurality of screws and through the interposition of a special high-temperature resistant gasket.
  • the connection flange has a connection portion projecting into the combustion chamber, and which the diffuser and the distributor are locked to.
  • the heat which is generated by the combustion on the outer side of the diffuser wall is known to be conveyed, by the hot combustion gases, to a heat exchanger for the heating of a fluid, for example, water, which is then conveyed for an use, for example, a heating system of an industrial process, of living environments, or the like.
  • the object of the present invention is to provide a gas burner for boiler having a simpler structure and which can be manufactured and assembled at a lower cost than the prior art burners.
  • a gas burner for boiler which can be supplied with a fuel and air mixture, comprising a support plate having:
  • connection flange the connection flange
  • the relative securing screws the gasket interposed between the connection flange and the support plate.
  • the use of the expensive stainless steel can be reduced for connecting the diffuser and the distributor to the support plate.
  • a gas burner for boilers i.e. a burner for the generation of heat, in general by means of the combustion of a fuel gas, or, in particular, of a pre-mixture of fuel gas and air is generally indicated with the reference numeral 1.
  • the burner 1 comprises a support plate 2 with an outer side 3 and an inner side 4 opposite the outer side 3 and intended to face a combustion chamber (not shown).
  • the support plate 2 is removably connectable to the combustion chamber through one or more first connection portions 5, preferably a plurality of through holes 6 obtained along a perimeter or outer edge 7 of the support plate 2 and intended to receive screws for the securing of the support plate 2 to the boiler combustion chamber.
  • the support plate 2 further defines a passage opening 8 for the passage of the fuel and air mixture 9 from the outer side 3 thereof to the inner side 4 thereof and, consequently, from the outer part of the combustion chamber to the inner part thereof.
  • a second connection portion 10 formed on the outer side 3 of the support plate 2 and so configured as to connect a supply duct 11 in flow communication with the passage opening 8 is provided.
  • the second connection portion 10 comprises a plurality of holes 12, which are preferably blind, internally threaded and distributed around the passage opening 8.
  • the holes 12 open onto the outer side 4 of the support plate 2, and are adapted to receive screws 13 for the securing of the supply duct 11.
  • An essentially planar annular surface 14 is formed on the outer side 3 of the support plate 2, and extends all around the passage opening 8. Such annular surface 14 forms a sealing surface which a corresponding sealing surface 15 can abut against (with or without the interposition of a gasket) which is formed in a connection flange 16 of the supply duct 11.
  • the connection flange 16 comprises a plurality of through holes 17 which are suitable to receive the screws 13 for the connection of the supply duct 11 to the support plate 2.
  • the aforementioned holes 12 are formed in the annular sealing surface 14, and the through holes 17 of the supply duct 11 flange 16 are also formed in the corresponding sealing surface 15.
  • the burner 1 further comprises a third connection portion 18, which is formed on the inner side 4 of the support plate 2 at the passage opening 8, and so configured as to allow a direct connection of a diffusion wall 19 and/or a distribution wall 20 to the support plate 2, so that such diffusion and/or distribution walls are arranged in flow communication with the passage opening 8.
  • the third connection portion 18 and the support plate 2 are formed as one piece, preferably by aluminium die-casting. This allows completely eliminating the connection flange, which is essential in prior art burners, and achieving a material and manufacturing and assembly cost saving.
  • the third connection portion 18 forms a distributor seat 21 which is essentially annular and so configured as to receive the distributor wall 20, as well as a separate diffuser seat 22 which is essentially annular and so configured as to receive the diffuser wall 19.
  • the third connection portion 18 only forms a distributor seat 21 in order to receive and lock the distribution wall 20, while the diffuser gets to be connected to the distributor wall.
  • the embodiment has been contemplated according to which the third connection portion 18 only forms a diffuser seat 22 in order to receive and lock the diffusion wall 19, while the distributor can be connected to the diffuser wall, or it can be even omitted.
  • the diffuser 19 is essentially cylindrical or frusto-conical
  • the distributor 20 is essentially cylindrical or frusto-conical and arranged in a co-axial manner inside the diffuser 19 (see Fig. 5 ).
  • the diffuser 22 and the distributor 21 seats can also be essentially circular and co-axial.
  • the third connection portion 18 projects from the support plate 2 and has an essentially tubular shape, with an inner surface 23 defining the passage opening 8, and an outer surface 24 constituting the diffuser seat 22 and/or the distributor seat 21.
  • such outer surface 24 comprises a first circumferential partial surface 25, adjacent to the support plate 2 plate-like body, and a second circumferential partial surface 26, arranged between a free end 27 of the third connection portion 18 and the first partial surface 25.
  • the first partial surface 25 has a diameter which is greater than the second partial surface 26 diameter, and it is divided from the latter by a circumferential step 28.
  • the direct connection between the diffuser wall 19 and the third connection portion 18 is preferably achievable through an interference coupling, locking by means of screws, or locking by means of permanent set by plastic deformation.
  • the direct connection between the distributor wall 20 and the third connection portion 18 is also preferably achievable through an interference coupling, locking by means of screws, or locking by means of permanent set by plastic deformation.
  • the proper positioning of the distributor wall 20 in relation to the diffuser wall 19 is advantageously ensured by an upper bottom 29 which is adapted to be connected to diffuser and distributor upper edges 30, 31 opposite the abovementioned bases which are received by the third connection portion 18.
  • the burner according to the present invention has a number of advantages. In particular, it has a reduced number of individual components and, in particular, stainless steel components, as well as an easily and quickly assemblable structure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)

Claims (11)

  1. Brûleur à gaz (1) pour chaudière qui peut être alimenté avec un mélange de combustible et d'air, comprenant une plaque de support (2) ayant :
    un côté externe (3) et un côté interne (4) opposé au côté externe (3) et prévu pour faire face à une chambre de combustion,
    une ou plusieurs premières parties de raccordement (5) pour un raccordement amovible de la plaque de support (2) à la chambre de combustion,
    une ouverture de passage (8) pour le passage dudit mélange de combustible et d'air dudit côté externe (3) audit côté interne (4) à la plaque de support (2),
    une deuxième partie de raccordement (10) formée sur ledit côté externe (3) et adaptée pour le raccordement d'un conduit d'alimentation en combustible-air (11) à ladite plaque de support (2) en communication d'écoulement avec ladite ouverture de passage (8),
    une troisième partie de raccordement (18) essentiellement de forme tubulaire formée sur le côté interne (4) de la plaque de support (2) au niveau de ladite ouverture de passage (8), dans lequel ladite troisième partie de raccordement (18) fait saillie de ladite plaque de support (2) et est configurée pour un raccordement direct d'une paroi de diffuseur (19) et d'une paroi de distributeur (20) à ladite plaque de support (2) en communication d'écoulement avec ladite ouverture de passage (8),
    dans lequel ladite troisième partie de raccordement (18) et ladite plaque de support (2) sont formées d'un seul tenant,
    dans lequel ladite troisième partie de raccordement (18) a une surface interne (23) définissant ladite ouverture de passage (8), et une surface externe (24),
    caractérisé en ce que ladite surface externe (24) comprend :
    une première surface partielle circonférentielle (25) adjacente au corps en forme de plaque de la plaque de support (2) et formant un siège de diffuseur (22) essentiellement annulaire configuré ainsi afin de recevoir ladite paroi de diffuseur (19),
    une seconde surface partielle (26) circonférentielle agencée entre une extrémité libre (27) de la troisième partie de raccordement (18) et ladite première surface partielle (25), ladite seconde surface partielle (26) formant un siège de distributeur (21) essentiellement annulaire configuré ainsi pour recevoir ladite paroi de distributeur (20),
    un échelon circonférentiel (28) formé entre ladite première et ladite seconde surface partielle,
    dans lequel ladite première surface partielle (25) a un diamètre qui est supérieur au diamètre de ladite seconde surface partielle (26).
  2. Brûleur à gaz (1) pour chaudière selon la revendication 1, dans lequel ledit siège de diffuseur (22) est essentiellement circulaire et ledit siège de distributeur (21) est essentiellement circulaire et coaxial par rapport audit siège de diffuseur (22).
  3. Brûleur à gaz (1) pour chaudière selon l'une quelconque des revendications précédentes, dans lequel ladite plaque de support (2) et ladite troisième partie de raccordement (18) sont formées d'un seul tenant par moulage sous pression de l'aluminium.
  4. Brûleur à gaz (1) pour chaudière selon l'une quelconque des revendications précédentes, comprenant un diffuseur avec une paroi de diffuseur (19) ayant une base qui est reçue par ledit siège de diffuseur (22) de ladite troisième partie de raccordement (18).
  5. Brûleur à gaz (1) pour chaudière selon la revendication précédente, dans lequel le raccordement direct entre ladite paroi de diffuseur (19) et ladite troisième partie de raccordement (18) est choisi dans le groupe comprenant :
    les couplages par interférence,
    le verrouillage par vis,
    le verrouillage par ensemble permanent.
  6. Brûleur à gaz (1) pour chaudière selon l'une quelconque des revendications 4 ou 5, dans lequel ladite paroi de diffuseur (19) est essentiellement cylindrique et bloquée par interférence sur ledit siège de diffuseur (22).
  7. Brûleur à gaz (1) pour chaudière selon l'une quelconque des revendications précédentes, comprenant un distributeur avec une paroi de distributeur (20) ayant une base qui est reçue par ledit siège de distributeur (21) de ladite troisième partie de raccordement (18).
  8. Brûleur à gaz (1) pour chaudière selon la revendication précédente, dans lequel le raccordement direct entre ladite paroi de distributeur (20) et ladite troisième partie de raccordement (18) est choisi dans le groupe comprenant :
    les couplages par interférence,
    le verrouillage par vis,
    le verrouillage par ensemble permanent.
  9. Brûleur à gaz (1) pour chaudière selon l'une quelconque des revendications 7 ou 8, dans lequel ladite paroi de distributeur (20) est essentiellement cylindrique et bloquée par interférence sur ledit siège de distributeur (21).
  10. Brûleur à gaz (1) pour chaudière selon l'une quelconque des revendications précédentes, dans lequel ladite deuxième partie de raccordement (10) comprend :
    une pluralité de trous borgnes intérieurement filetés (12) qui sont formés sur le côté externe (3) de la plaque de support (2) autour de l'ouverture de passage (8) et adaptés pour recevoir des vis (13) pour la fixation du conduit d'alimentation (11),
    une surface d'étanchéité annulaire (14) qui est essentiellement plane et s'étendant autour de toute l'ouverture de passage (8),
    dans lequel lesdits trous borgnes (12) sont formés dans ladite surface d'étanchéité annulaire (14).
  11. Brûleur à gaz (1) pour chaudière selon l'une quelconque des revendications précédentes, dans lequel ladite première partie de raccordement (5) comprend une pluralité de trous de passage (6) formés le long d'un périmètre externe (7) de la plaque de support (2) et adaptés pour recevoir des vis pour la fixation de la plaque de support (2) sur la chambre de combustible de la chaudière.
EP20080425004 2008-01-03 2008-01-03 Brûleur à gaz pour une chaudière Ceased EP2083217B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20080425004 EP2083217B1 (fr) 2008-01-03 2008-01-03 Brûleur à gaz pour une chaudière

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20080425004 EP2083217B1 (fr) 2008-01-03 2008-01-03 Brûleur à gaz pour une chaudière

Publications (2)

Publication Number Publication Date
EP2083217A1 EP2083217A1 (fr) 2009-07-29
EP2083217B1 true EP2083217B1 (fr) 2013-05-01

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ID=39591791

Family Applications (1)

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EP20080425004 Ceased EP2083217B1 (fr) 2008-01-03 2008-01-03 Brûleur à gaz pour une chaudière

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EP (1) EP2083217B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110192066A (zh) * 2016-10-21 2019-08-30 瓦盖斯燃烧器有限责任公司 用于锅炉的气体燃烧器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900005504A1 (it) * 2019-04-10 2020-10-10 Beckett Thermal Solutions S R L Collettore per un bruciatore a gas

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3704748A (en) 1970-02-11 1972-12-05 Ratheon Co Heat transfer structure
US5022352A (en) 1990-05-31 1991-06-11 Mor-Flo Industries, Inc. Burner for forced draft controlled mixture heating system using a closed combustion chamber
US6694926B2 (en) 2000-01-10 2004-02-24 Lochinvar Corporation Water heater with continuously variable air and fuel input
GB2396402B (en) * 2002-12-21 2006-01-11 Aeromatix Ltd Gas burner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110192066A (zh) * 2016-10-21 2019-08-30 瓦盖斯燃烧器有限责任公司 用于锅炉的气体燃烧器
CN110192066B (zh) * 2016-10-21 2021-02-12 贝克特热能解决方案责任有限公司 用于锅炉的气体燃烧器

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Publication number Publication date
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