GB2503265A - Flanged gas burner assembly - Google Patents

Flanged gas burner assembly Download PDF

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Publication number
GB2503265A
GB2503265A GB201210992A GB201210992A GB2503265A GB 2503265 A GB2503265 A GB 2503265A GB 201210992 A GB201210992 A GB 201210992A GB 201210992 A GB201210992 A GB 201210992A GB 2503265 A GB2503265 A GB 2503265A
Authority
GB
United Kingdom
Prior art keywords
distributor
flange
flame strip
gas burner
flame
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.)
Withdrawn
Application number
GB201210992A
Other versions
GB201210992D0 (en
Inventor
Marek Leopold Szadurski
Stephen John Baker
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 Ltd
Original Assignee
Worgas Burners Ltd
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 Burners Ltd filed Critical Worgas Burners Ltd
Priority to GB201210992A priority Critical patent/GB2503265A/en
Publication of GB201210992D0 publication Critical patent/GB201210992D0/en
Priority to PCT/GB2013/051587 priority patent/WO2013190286A1/en
Publication of GB2503265A publication Critical patent/GB2503265A/en
Withdrawn legal-status Critical Current

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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/12—Radiant burners
    • F23D14/14—Radiant burners using screens or perforated plates
    • F23D14/145—Radiant burners using screens or perforated plates combustion being stabilised at a screen or a perforated plate
    • 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
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • F23D14/583—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration of elongated shape, e.g. slits
    • F23D14/586—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration of elongated shape, e.g. slits formed by a set of sheets, strips, ribbons or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/101—Flame diffusing means characterised by surface shape
    • F23D2203/1012—Flame diffusing means characterised by surface shape tubular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/102—Flame diffusing means using perforated plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/14—Special features of gas burners
    • F23D2900/14001—Sealing or support of burner plate borders

Landscapes

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

Abstract

A gas burner 40 has an internal cavity for receiving a gas and air mixture, and includes a flame strip 42 with a distributor 44 located therein. The flame strip is in the form of a cylindrical wall 50 coaxially surrounding the distributor, and includes holes, which may be circular and/or in the form of slots. The distributor is also of cylindrical form and has holes 60 in its cylindrical wall 62. An external mounting flange 46 is provided at one end of the cavity, and the mounting flange is formed by walls of the distributor and flame strip being turned outwardly to form annular flanges 52, 64, with the flanges of the distributor and flame strip being joined together to form the external mounting flange. The opposite end of the flame strip may include a lip 58, and the burner may include an end cap 48 which may have a rim 68 for engagement with the flame strip lip. The end cap, flame strip and distributor may be manufactured from a sheet of metal, and joined by mechanical fastening, for example tabs.

Description

Gas Burner This invention relates to a gas burner, and particularly but not exclusively to a gas burner for use in domestic heating appliances.
The burner may be of the "premix" type, meaning that all the air required for combustion is mixed with a fuel gas prior to burning.
This invention relates to burners of the type which include a cavity for rebeiving a gasand air mixture, a cylindrical distributor surrounding the cavity with relatively large through holes therein. A cylindrical flame strip surrounds the distributor, with a plurahty of relatively small through holes therein defining flame ports through which the gas and air mixture may pass immediately prior to combustion.
In some instances it is required to provide a restrictor tube which is a tube of a smaller diameter which extends coaxially within the distributor for part of the length thereof. Restrictor tubes can help to alleviate noise in gas burners.
According to one aspect of the present invention there is provided a gas burner, the gas burner including an internal cavity for receiving a gas and air mixture, a distributor in the form of a cylindrical wall surrounding the cavity with a plurality of through holes in the wall, a flame strip in the form of a cylindrical wall coaxially surrounding the distributor, with a plurality of through holes in the wall of the flame strip, an external mounting flange being provided at one end of the cavity, the mounting flange being formed by walls of the cylinder and flame strip being turned outwardly at said one end to form annular flanges, with the flanges of the cylinder and flame strip being joined together to form the external mounting flange.
In one embodiment the outer edge of the flame strip flange is turned inwardly so as to sandwich the outer edge of the distributor flange between the outer edge of the flame strip flange and the remainder of the flame strip flange.
In a further embodiment the outer edge of the distributor flange is turned inwardly so as to sandwich the outer edge of the flame strip flange between the outer edge of the distributor flange and the remainder of the distributor flange.
The burner may also include a restrictor tube in the form of a cylindrical wall coaxially located in the distributor and extending for part of the length thereof from said one end, the wall of the restrictor tube being turned outwardly at said one end to form an annular flange, with the restrictor tube is flange being joined to the distributor and flame strip flanges to form the mounting flange.
The restrictor tube flange may be sandwiched with the distributor flange between the flame strip flange and the inwardly turned outer edge thereof. -The flanges may be joined together by mechanical pressing.
The flanges may be joined together by welding.
Openings which may be in the form of slots and may be axial or circumferential, may be provided in the walls of any of the flame strip, distributor or restrictor tube at said one end to facilitate formation of the respective flanges.
Openings may be provided in the flame strip wall where it folds over the distributor flange.
Openings may be provided in the distributor wall where it folds over the flame strip flange.
The burner may also include an end cap at the other end thereof, which end cap closes the flame strip and distributor. The end cap may be mounted on the other end of the flame strip by folding part of the end cap over the end of the flame strip.
The distributor and/or flame strip may be formed from shaped sheet metal, and a mechanical join may be provided between ends of the sheet material to form the cylindrical shape.
According to a further aspect of the present invention there is provided a method of forming a gas burner, the method comprising providing a distributor within a flame strip, with each of the distributor and flame strip in the form of a cylinder with an external flange at one end, and joining together the distributor and flame strip flanges to form an external flange for the burner.
The burner external flange may be formed by folding an outer part of a one of the external flanges of the flame strip and distributor over the external flange of the other of the flame strip or distributor.
The flame strip and distributor flanges may be joined together by mechanical pressing.
The flame strip and distributor flanges may be joined together. by welding.
Embodiments of the present invention will now be described by way of example only with reference to the accompanying drawings, in which:-Fig. 1 is a diagrammatic perspective view of a conventional burner in place within an appliance; Fig. 2 is a diagrammatic cross sectional side view of a first burner according to the invention; Fig. 3 is a diagrammatic perspective cut away view of the burner of Fig. 2; Fig. 4 is a diagrammatic perspective more detailed view of part of the burner of Fig. 2; and Figs. 5, 6 and 7 are similar views respectively to Figs. 2, 3 and 4, but of a second burner according to the invention.
Fig. 1 shows by way of illustration a gas burner 10 located within a heating appliance including a combustion zone 12 and heat exchanger 14.
The gas burlier 10 includes a cylindrical flame strip 16 with a concentric inner distributor 18, enclosing an internal cavity 20. An end cap 22 is attached to the flame strip 16 and closes one axial end of the gas burner 10. A mounting flange 24 is attached to the othe'r axial end of the flame strip 16 and extends radially outwardly therefrom. The gas burner 10 is attached to a housing 26 via the mounting flange 24.
The flame strip is provided with through holes in the form of flame ports 32, just a few of which are shown in Fig. 1. The flame ports are about 1mm in diameter, and their centres are about 2 -3mm apart. The flame ports 32 are arranged evenly over the flame strip 16. The distributor 18 is provided with a regular pattern of larger through holes 28.
In use, a gas and air mixture is passed into the cavity 20 and passes through the holes 28 in the distributor 20, and out through the flame ports 32 and into the combustion zone 12 where burning takes place. The heat thereby produced is utilised via the heat exchanger 14, with the flue products passing out of the unit as indicated by the arrow A. Figs. 2 to 4 show a first gas burner 40 according to the invention. The burner 40 comprises a flame strip 42, with a distributor 44 located therein. A mounting flange 46 is provided at one end of the burner 40, with an end cap 48 at the opposite end.
The flame strip 42 comprises a cylindrical wall 50 with a plurality of openings therethrough which are not shown in the drawings. The openings, flame ports, in the flame strip 42 may be in a uniform pattern, or could for instance vary along the length of the flame strip 42. The openings may be circular and/or in the form of slots.
At the one end the wall 50 is turned outwardly to define a flange 52.
An outer end 54 of the flange 52 is turned away from the remainder of the flame strip 42 and inwardly, and a plurality of axial slots 56 are provided at the loin between the flange 52 and the outer end thereof 54. The axial slots 56 facilitate bending of the flange 52 to provide the outer part 54 parallel thereto. The wall 50 at the other end of the flame strip 42 is turned outwardly and back upon itself to define a lip 58.
The flame strip 42 may be made from a strip of material, and a mechanical joint may be provided at each end of the strip to enable the strip to be formed into the cylinder shown. The mechanical formation may be in the form of a plurality of tabs axially spaced alternately on each end which overlap respectively inside and outside of the cylinder to hold the flame strip in its configuration.
The distributor 44 is again of cylindrical form with through holes 60 formed in a cylindrical wall 62. The end of the wall 62 at the mounting flange 16 end is turned outwardly to define a flange 64 which locates between the flange 52 of the flame strip 42, and outer end 54 thereof to be sandwiched therebetween. The flame strip flange 52 and outer edge 54 are pressed onto the distributor flange 64, to mount the flame strip 42 and distributor 44 together.
The distributor 44 may be formed in a similar fashion to the flame strip 42 from a sheet of metal, with a mechanical fastening to retain the distributor 44 in a cylindrical configuration.
The end cap 46 comprises a shaped piece with an inner portion 66 which locates within the distributor 44 to retain same in a required position.
The outer edge of the end cap 48 provides a rim 68 which can be formed to overlap the lip 58 to retain the end cap 48 in place. The outer edge of the end cap 48 may be in the form of a plurality of discrete tabs which can be urged to engage with the lip 58, for instance by spinning.
This therefore provides a gas burner which can be formed purely by mechnical steps and does not require for instance any welding or other joining techniques. This burner also only requires three components, namely the flame strip 42, distributor 44 and end cap 48, with the mounting flange 46 being formed by the flame strip 42 and distributor 44. This can provide a cost saving in material and also during manufacture, in a reduced number of steps involved.
Figs. 5 to 7 show a second burner 70 which is similar to the first burner 40, and similar reference numerals shall be applied. In this instance the burner 70 also includes a restrictor tube 72. The restrictor tube 72 comprises a cylindrical wall 74 substantiallY without openings therein except at each end thereof.
The restrictor tube 72 extends coaxially within the distributor 44 for a little over half the length of the burner 70 from the mounting flange 46. A restrictor tube flange 76 extends from the waIl 74 and locates between the distributor flange 64 and the flame strip flange 52 and outer end 54, to be sandwiched together therein.
A line of circumferential slots 78 is provided in the flange 76 towards an inner part thereof to facilitate bending of the material of the restrictor tube 72, and also to permit gas to pass therethrough.
A range of modifications may be made without departing from the scope of the invention. For instance, and particularly where there is no restrictor tube, the distributor flange could sandwich the flame strip flange rather than vice versa. Whilst mechanical fixing together of the flanges has been described above, as an alternative or in addition, the flanges could be welded together.
Other openings or formations could be provided in the walls of any ot the flame strip, distributor or restrictor tube to facilitate shaping thereof, Slots or other openings could be provided extending to ends of the material of the flame strip, distributor or restrictor tubes to facilitate forming thereof.
Whilst endeavouring in the foregoing specification tO draw attention to those features of the invention believed to be of particular importance it should be understood that the Applicant claims protection in respect of any patentable feature or combination of features hereinbefore referred to and/or shown in the drawings whether or not particular emphasis has been placed thereon.

Claims (24)

  1. CLAIMS1. A gas burner, the gas burner including an internal cavity for receiving a gas and air mixture, a distributor in the form of a cylindrical wall surrounding the cavity with a plurality of through holes in the wall, a flame strip in the form of a cylindrical wall coaxially surrounding the distributor, with a plurality of through holes in the wall of the flame strip, an external mounting flange being provided at one end of the cavity, the mounting flange being formed by walls of the cylinder and flame strip being turned outwardly at said one end to form annular flanges, with the flanges of the cylinder and flame strip being joined together to form the external mounting flange.
  2. 2. A gas burner according to claim 1, in which the outer edge of the flame strip flange is turned inwardly so as to sandwich the outer edge of the distributor flange between the outer edge of the flame strip flange and the remainder of the flame strip flange.
  3. 3. A gas burner according to claim 1, in which the outer edge of the distributor flange is turned inwardly so as to sandwich the outer edge of the flame strip flange between the outer edge of the distributor flange and the remainder of the distributor flange.
  4. 4. A gas burner according to any of the preceding claims, in which the burner also includes a restrictor tube in the form of a cylindrical wall coaxially located in the distributor and extending for part of the length thereof from said one end, the wall of the restrictor tube being turned outwardly at said one end to form an annular flange, with the restrictor tube flange being joined to the distributor and flame strip flanges to form the mounting flange.
  5. 5. A gas burner according to claim 4 when dependent on claim 2, in which the restrictor tube flange is sandwiched with the distributor flange between the flame strip flange and the inwardly turned outer edge thereof.I
  6. 6. A gas burner according to any of the preceding claims, in which the flanges are joined together by mechanical pressing.
  7. 7. A gas burner according to any of the preceding claims, in which the flanges are joined together by welding.
  8. 8. A gas burner according to any of the preceding claims, in which openings are provided in the walls of any of the flame strip, distributor or restrictor tube at said one end to facilitate formation of the respective flanges.
  9. 9. A gas burner according to claim 8, in which the openings are in the form of slots.
  10. 10. A gas burner according to claim 9, in which the slots are axial.
  11. 11. A gas burner according to! claim 9, in which the slots are circumferential.
  12. 12. A gas burner according to any of the preceding claims, in which openings are provided in the flame strip wall where it folds over the distributor flange.
  13. 13. A gas burner according to any of the preceding blaims, in which openings are provided in the distributor wall where it folds over the flame strip flange.
  14. 14. A gas burner according to any of the preceding claims, in which the burner includes an end cap at the other end thereof, which end cap closes the flame strip and distributor.
  15. 15. A gas burner according to claim 14, in which the end cap is mounted on the other end of the flame strip by folding part of the end cap over the end of the flame strip.
  16. 16. A gas burner according to any of the preceding claims, in which the distributor and/or flame strip are formed from shaped sheet metal.
  17. 17. A gas burner according to claim 16, in which a mechanical join is provided between ends of the sheet material to form the cylindrical shape.
  18. 18. A method of forming a gas burner, the method comprising providing a distributor within a flame strip, with each of the distributor and flame strip in the form of a cylinder with an external flange at one end, and joining together the distributor and flame strip flanges to form an external flange for the burner.
  19. 19. A method according to claim 18, in which the burner external flange is formed by folding an outer part of a one of the external flanges of the flame strip and distributor over the external flange of the other of the flame strip or distributor.
  20. 20. A method according to claims 18 or 19, in which the flame strip and distributor flanges are joined together by mechanical pressing.
  21. 21. A method according to any of claims 18 to 20, in which the flame strip and distributor flanges are joined together by welding.
  22. 22. A gas burner substantially as hereinbefore described and with reference to the accompanying drawings.
  23. 23. A method of forming a gas burner, the method being substantially as hereinbefore described and with reference to the accompanying drawings.
  24. 24. Any novel subject matter or combination including novel subject matter disclosed herein, whether or not within the scope of or relating to the same invention as any of the preceding claims.
GB201210992A 2012-06-21 2012-06-21 Flanged gas burner assembly Withdrawn GB2503265A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB201210992A GB2503265A (en) 2012-06-21 2012-06-21 Flanged gas burner assembly
PCT/GB2013/051587 WO2013190286A1 (en) 2012-06-21 2013-06-18 Gas burner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB201210992A GB2503265A (en) 2012-06-21 2012-06-21 Flanged gas burner assembly

Publications (2)

Publication Number Publication Date
GB201210992D0 GB201210992D0 (en) 2012-08-01
GB2503265A true GB2503265A (en) 2013-12-25

Family

ID=46641269

Family Applications (1)

Application Number Title Priority Date Filing Date
GB201210992A Withdrawn GB2503265A (en) 2012-06-21 2012-06-21 Flanged gas burner assembly

Country Status (2)

Country Link
GB (1) GB2503265A (en)
WO (1) WO2013190286A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2510173A (en) * 2013-01-28 2014-07-30 Worgas Burners Ltd Reduced noise burner
GB2523733A (en) * 2014-02-12 2015-09-09 Worgas Burners Ltd Gas burner

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
GB2396402A (en) * 2002-12-21 2004-06-23 Aeromatix Ltd Gas burner
EP1840460A1 (en) * 2006-03-29 2007-10-03 Aeromatix Limited Gas burner

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5160140B2 (en) * 2007-04-27 2013-03-13 株式会社パロマ Burner

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
GB2396402A (en) * 2002-12-21 2004-06-23 Aeromatix Ltd Gas burner
EP1840460A1 (en) * 2006-03-29 2007-10-03 Aeromatix Limited Gas burner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2510173A (en) * 2013-01-28 2014-07-30 Worgas Burners Ltd Reduced noise burner
GB2523733A (en) * 2014-02-12 2015-09-09 Worgas Burners Ltd Gas burner

Also Published As

Publication number Publication date
GB201210992D0 (en) 2012-08-01
WO2013190286A1 (en) 2013-12-27

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