EP2199675A2 - Dispositif avec brûleur - Google Patents

Dispositif avec brûleur Download PDF

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Publication number
EP2199675A2
EP2199675A2 EP09252836A EP09252836A EP2199675A2 EP 2199675 A2 EP2199675 A2 EP 2199675A2 EP 09252836 A EP09252836 A EP 09252836A EP 09252836 A EP09252836 A EP 09252836A EP 2199675 A2 EP2199675 A2 EP 2199675A2
Authority
EP
European Patent Office
Prior art keywords
burner
sensor
magnet
monitoring device
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Withdrawn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
EP09252836A
Other languages
German (de)
English (en)
Other versions
EP2199675A3 (fr
Inventor
Colin Harris
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.)
Autoflame Engineering Ltd
Original Assignee
Autoflame Engineering 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 Autoflame Engineering Ltd filed Critical Autoflame Engineering Ltd
Publication of EP2199675A2 publication Critical patent/EP2199675A2/fr
Publication of EP2199675A3 publication Critical patent/EP2199675A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • 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
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • 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
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/725—Protection against flame failure by using flame detection devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/245—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electrical or electromechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2208/00—Control devices associated with burners
    • F23D2208/10—Sensing devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2229/00—Flame sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2229/00—Flame sensors
    • F23N2229/20—Camera viewing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2900/00—Special features of, or arrangements for controlling combustion
    • F23N2900/05005—Mounting arrangements for sensing, detecting or measuring devices

Definitions

  • the present invention relates to a burner installation and more particularly to a burner installation including a burner flame monitoring device.
  • a burner installation may, for example, be of the kind used in an industrial boiler.
  • a sensor In order to monitor for the presence of a flame in a burner, it is known to provide a sensor to check for the presence of a flame. The same sensor may be used to check for both the presence of the main flame and the presence of the pilot flame.
  • the sensor is provided on a mounting device of some kind which is mounted on the burner housing.
  • the mounting device is necessarily detachably mounted on the burner housing to allow for any necessary maintenance or repair of the sensor, but it is important that the flame monitoring device is not able to operate effectively when removed from the burner housing, for example, by placing it in front of some other flame. If it were, then a person repairing the burner might seek to do that in order to allow continued operation of the burner without the flame monitor being properly installed and that could allow gas to be fed to the burner when it was not lit, which could be very dangerous.
  • An object of the invention is to provide a burner installation with an improved arrangement for detecting the presence of a flame monitoring device.
  • a burner installation including:
  • Using a magnet and sensor to detect if the mounting device is detached from the burner housing provides a system that need not be obvious to a service engineer and that is not easily bypassed. Also the system may be more reliable than a micro-switch that can be affected by particles of dirt and the like that may be present in the environment of a burner installation.
  • the burner flame monitoring device is preferably secured to a mounting device that is in turn detachably mounted on the burner housing.
  • the magnet Whilst it is in principle possible for the magnet to be mounted on the monitoring device and the sensor on the burner housing it is preferred that the magnet is secured in fixed relationship to the burner housing and the sensor is secured in fixed relationship to the monitoring device.
  • the magnet may be in any desired form, including for example an electromagnet, but preferably it is a permanent magnet.
  • the magnet is preferably generally ring shaped.
  • the magnet is preferably provided on a cylindrical part of the burner housing, the sensor being received within the cylindrical part when the monitoring device is mounted on the burner housing.
  • the cylindrical part of the burner housing need not be an integral part of the whole housing and in an embodiment of the invention described below it is a part separate from the rest of the housing but secured to the rest of the housing.
  • the magnet is preferably provided on the interior of the cylindrical part. In an embodiment of the invention described below, the magnet is seated in a recess around one end of the interior of the cylindrical part. In the case where the magnet is ring shaped, the interior diameter of that ring is preferably the same as the interior diameter of a neighbouring portion of the cylindrical part.
  • the cylindrical part may be made of steel.
  • the senor is positioned inside a tubular part that is received within the cylindrical part of the burner housing.
  • the tubular part may be part of the mounting device. It is possible for the tubular part to provide the whole of the mounting device but more commonly it represents only a portion of the mounting device.
  • the mounting device comprises the tubular part and a further tubular part of larger diameter coaxial with the tubular part.
  • the sensor is positioned eccentrically within the tubular part. Such eccentric positioning facilitates the close positioning of the sensor and the magnet when the flame monitoring device is installed in the burner housing.
  • the tubular part is made of a material of low magnetic permeability. That is desirable if the tubular wall of the tubular part is interposed between the sensor and the magnet, as in an embodiment of the invention described below.
  • the tubular part may be made of aluminium or an aluminium alloy.
  • the sensor may take any of various forms suitable for detecting the proximity of a magnet.
  • the sensor comprises a magnetic reed switch.
  • the sensor is preferably arranged to prevent an output signal from the flame monitoring device in the event that the proximity of the magnet is not detected. That provides a very simple way of incorporating the sensor and magnet arrangement into the flame monitoring device.
  • the sensor may, for example, disable the flame monitoring device, for example, by disconnecting a power supply to the device.
  • the sensor may be mounted on a printed circuit board on which the flame monitoring device is also mounted.
  • the printed circuit board may be received in the further tubular part with the sensor mounted on the printed circuit board projecting therefrom into the tubular part (that is the tubular part of smaller diameter).
  • the burner flame monitoring device may be of any suitable kind, including for example an ultra-violet device, but is preferably an infrared monitoring device.
  • the invention also provides a burner installation further including a control unit for controlling the flow of fuel and air to the burner, the control unit being arranged to prevent a flow of fuel to the burner in the event that the proximity of the magnet is not detected by the sensor.
  • a burner installation shown therein includes a burner housing that includes a wall 1, part of which is shown in Fig. 1 , and a cylindrical part 2 screw threadedly connected to a spigot 3 that is welded to the wall 1.
  • the cylindrical part 2 has an end portion 4 whose exterior is knurled to facilitate its attachment to, and detachment from, the spigot 3.
  • the cylindrical part 2 and the spigot 3 are made of steel.
  • a mounting device for a flame monitor includes a tubular member 5 having a relatively small diameter front tubular part 6 which is received within the cylindrical part 2, a short intermediate part 7 which is of an intermediate diameter and is immediately outside the cylindrical part 2, a relatively large diameter rear tubular part 8 extending from the intermediate part, and an end plate 9 that is screwed over the open end of the tubular part 8 by screws (not shown) in screw holes 11.
  • a circumferential recess 10 extends around the exterior of the front tubular part 6 and receives an O ring (not shown) sealing the interface between the cylindrical part 2 and the tubular member 5.
  • the tubular member 5 is made of aluminium.
  • a printed circuit board 12 of generally circular shape is mounted across the interior of the tubular part 8 at the front thereof and secured in position by screws 13.
  • An infrared flame sensor 14 is mounted centrally on the front face of the printed circuit board and is therefore able to detect a flame in the region generally designated 15 from a burner head indicated by dotted lines 18 in Fig. 1 , since there is a line of sight from the sensor 14 through the open interior of the tubular member 5, the cylindrical part 2 and the spigot 3.
  • the rear tubular part 8 is provided on its circumference with a cable outlet opening 16 through which a cable can be introduced and connected to the printed circuit board 12 whilst maintaining a seal where the cable passes through the opening.
  • the cable can provide power to the elements on the printed circuit board and convey an output signal to a control unit for the burner.
  • the cylindrical part 2 is generally of constant internal diameter but is recessed at its rear end where it receives a magnet 22 which, after installation in the cylindrical part is machined to the same interior diameter as the rest of the cylindrical part 2.
  • a magnetic reed switch 17 is mounted on the front face of the printed circuit board away from the central axis of the board and the cylindrical and tubular parts 2, 5. The position of the switch is shown in dotted outline in Fig. 1 and it can be seen that it extends alongside the interior cylindrical face of the tubular part 6 of the tubular member 5 and alongside the magnet from which it is separated by the aluminium tubular part 6. The magnetic field generated by the magnet maintains the reed switch closed.
  • Figs. 2 and 3 show the cylindrical part 2 and the tubular member 5 respectively.
  • the tubular member 5 is shown without any of its ancillary parts.
  • Fig. 4 shows how the reed switch 17 is connected electrically with the flame monitoring device.
  • an external power supply 21 for internal power regulators 19 for the flame sensor 14 is connected via the reed switch 17.
  • the reed switch is held closed and power supplied to the flame sensor control circuitry as usual. If, however, the reed switch is removed from the magnetic field of the magnet then the switch opens and the flame sensor is cut off from its power supply and is therefore unable to indicate the presence of a flame.
  • Fig. 4 also shows that the flame sensor 14 is connected to a control unit 20 that controls the operation of the burner and in particular the flow of fuel and air to the burner.
  • a control unit 20 that controls the operation of the burner and in particular the flow of fuel and air to the burner.
  • the sensor 14 detects a flame, it sends an output signal to the control unit 20 and the control unit regulates the flow of fuel and air in the normal way.
  • the sensor does not detect a flame, it sends no output signal to the control unit 20 and the control unit is programmed in that case to prevent the flow of any fuel to the burner.
  • the flame sensor and the reed switch are mounted on a printed circuit board which in turn is secured to a tubular member 5. It should be understood, however, that this is only one possible physical arrangement and many other arrangements are possible, provided that removal of the flame sensor from its proper location causes the reed switch to open.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)
  • Feeding And Controlling Fuel (AREA)
EP09252836.3A 2008-12-19 2009-12-18 Dispositif avec brûleur Withdrawn EP2199675A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0823303.3A GB2466305B (en) 2008-12-19 2008-12-19 Burner installation

Publications (2)

Publication Number Publication Date
EP2199675A2 true EP2199675A2 (fr) 2010-06-23
EP2199675A3 EP2199675A3 (fr) 2017-05-24

Family

ID=40343991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09252836.3A Withdrawn EP2199675A3 (fr) 2008-12-19 2009-12-18 Dispositif avec brûleur

Country Status (3)

Country Link
US (1) US20100159407A1 (fr)
EP (1) EP2199675A3 (fr)
GB (1) GB2466305B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ512244A (en) 1998-11-12 2003-12-19 Invitrogen Corp Polycationic transfection reagents for introducing anions into a cell
US10392959B2 (en) * 2012-06-05 2019-08-27 General Electric Company High temperature flame sensor
US20150316256A1 (en) * 2014-05-02 2015-11-05 Air Products And Chemicals, Inc. Oil Burner With Monitoring
EP3169310A1 (fr) 2014-07-15 2017-05-24 Life Technologies Corporation Compositions comprenant des agrégats lipidiques et procédés d'administration efficace de molécules dans des cellules

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US2282551A (en) * 1938-12-12 1942-05-12 Drying Systems Inc Burner safety control
US3216477A (en) * 1963-08-08 1965-11-09 Bernard W Devine Flame safeguard systems and devices
GB1120595A (en) * 1966-05-12 1968-07-17 Babcock & Wilcox Ltd Improvements in or relating to burners
US3599132A (en) * 1968-08-02 1971-08-10 Edward Shlesinger Jr Permanently polarized reed switch
US3541549A (en) * 1968-08-19 1970-11-17 Mc Graw Edison Co Self-checking flame detection apparatus
US3684423A (en) * 1970-11-23 1972-08-15 Electronics Corp America Burner control system
US3683372A (en) * 1971-05-27 1972-08-08 Robert Horn Multimode self-checking flame detector
US3794460A (en) * 1972-10-03 1974-02-26 American Air Filter Co Control arrangement for air ventilating and air heating systems having automatic reset and manual reset safety devices
US3951584A (en) * 1974-05-23 1976-04-20 Midland-Ross Corporation Self-stabilizing burner
JPS595955B2 (ja) * 1979-07-27 1984-02-08 ホーチキ株式会社 火災報知機
JPS5664999A (en) * 1979-10-19 1981-06-02 Tokico Ltd Lubricating system
US5236328A (en) * 1992-09-21 1993-08-17 Honeywell Inc. Optical flame detector performance tester
US5513229A (en) * 1993-11-12 1996-04-30 General Electric Company Method for removing control rod drive using tool to verify control rod drive uncoupling
US5524030A (en) * 1994-02-22 1996-06-04 General Electric Company Multistage control rod drive uncoupling tool
US5472337A (en) * 1994-09-12 1995-12-05 Guerra; Romeo E. Method and apparatus to detect a flame
US5495112A (en) * 1994-12-19 1996-02-27 Elsag International N.V. Flame detector self diagnostic system employing a modulated optical signal in composite with a flame detection signal
US6064064A (en) * 1996-03-01 2000-05-16 Fire Sentry Corporation Fire detector
JP3294151B2 (ja) * 1997-05-20 2002-06-24 三菱重工業株式会社 燃焼器の火炎検知装置
AU2151199A (en) * 1997-11-05 1999-05-31 Kuil, Jan Dispensing device and container assembly comprising such device
AU1547000A (en) * 1998-10-09 2000-05-01 Gunther Nath Waveguide with hand switch
US6253960B1 (en) * 1999-10-29 2001-07-03 S.O.B. Partnership Self-contained high pressure pneumatic beverage dispensing system
SE527101C2 (sv) * 2004-05-19 2005-12-20 Volvo Lastvagnar Ab Magnetbrytararrangemang och förfarande för att erhålla en differentialmagnetbrytare
US7219495B2 (en) * 2004-06-04 2007-05-22 Zf Friedrichshafen Ag Hydraulic cylinder
FI122096B (fi) * 2006-01-18 2011-08-31 Marioff Corp Oy Sprinkleri
JP4190544B2 (ja) * 2006-04-18 2008-12-03 トヨタ自動車株式会社 ストップランプスイッチ
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Non-Patent Citations (1)

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Title
None

Also Published As

Publication number Publication date
EP2199675A3 (fr) 2017-05-24
GB0823303D0 (en) 2009-01-28
US20100159407A1 (en) 2010-06-24
GB2466305B (en) 2015-06-03
GB2466305A (en) 2010-06-23

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