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WO1998038460A1 - Ameliorations apportees a des bruleurs a gaz catalytiques ou les concernant - Google Patents

Ameliorations apportees a des bruleurs a gaz catalytiques ou les concernant Download PDF

Info

Publication number
WO1998038460A1
WO1998038460A1 PCT/IE1998/000014 IE9800014W WO9838460A1 WO 1998038460 A1 WO1998038460 A1 WO 1998038460A1 IE 9800014 W IE9800014 W IE 9800014W WO 9838460 A1 WO9838460 A1 WO 9838460A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas
thermostat
piston
bore
nozzle
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
PCT/IE1998/000014
Other languages
English (en)
Inventor
Derek William Butler
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.)
B S TECHNOLOGY Ltd
Original Assignee
B S TECHNOLOGY 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 B S TECHNOLOGY Ltd filed Critical B S TECHNOLOGY Ltd
Priority to AU66330/98A priority Critical patent/AU6633098A/en
Publication of WO1998038460A1 publication Critical patent/WO1998038460A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/01—Control of temperature without auxiliary power
    • G05D23/02—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature
    • G05D23/08—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature with bimetallic element
    • 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
    • F23D14/28—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid in association with a gaseous fuel source, e.g. acetylene generator, or a container for liquefied gas
    • 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
    • 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
    • F23N2237/00—Controlling
    • F23N2237/12—Controlling catalytic burners
    • 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
    • F23N5/04—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using bimetallic elements

Definitions

  • the present invention relates to catalytic gas burners and in particular to ignition control for such gas burners.
  • the valve is in the form of a piston directly movable by the disc into and out of engagement with an orifice forming a gas exit from the gas storage chamber.
  • valve linearly movable between an open and closed position
  • the invention provides a catalytic gas burner comprising:
  • an elongated hollow gas burner body closed at one end by a gas nozzle assembly feeding a catalyst and at its other end closed by an end plate carrying an inlet orifice communicating with the gas storage chamber;
  • a piston having a bore and at one end slidably engaging portion of the nozzle assembly within the gas burner body with its bore communicating with the nozzle assembly and at its other end slidably engaging in a gas type manner with a chamber communicating with the inlet orifice, the piston carrying an end face seal covering its bore and engagable with the orifice and the bore having a radially arranged hole, connecting the bore to the interior of the chamber;
  • a bi-metallic strip in the form of a washer-like disc mounted on the nozzle assembly between it and the other end face of the piston is a particularly suitable form of gas burner, it has the minimum number of moving parts and it can be manufactured relatively cheaply and in particular requires the minimum modification to existing equipment to provide it since many of the parts at present used in such gas burners, may be readily easily adapted to provide this gas burner.
  • Fig. 1 is a cross-sectional view of portion of a gas burner in a working position
  • Fig. 2 is a sectional view similar to Fig. 1 showing gas cut-off by its thermostatic valve;
  • Fig. 3 is a cross-sectional view, in which sectional lines are omitted and which shows in more detail most of the gas burner according to the invention in the totally shut-off position;
  • Fig. 4 is a view similar to Fig. 3 showing the gas burner in the normal operating position
  • Fig. 5 is a view similar to Figs. 3 and 4 showing the gas burner in the initial ignition position
  • Fig. 6 is a view similar to Figs. 3 to 5 showing the gas burner operating with the gas cut-off by the thermostatic;
  • Fig. 7 is a view of the total gas burner illustrated in Figs. 1 to 6 forming part of a glue gun; and
  • Fig. 8 is a view of another glue gun incorporating an alternative gas burner in accordance with the invention.
  • the plug 6 is threaded to engage a corresponding internal thread on the plate 5. Radial rotation of the plug 6 is used to vary the temperature of the burner.
  • the spigot 7 is of conventional construction.
  • the plug 6 has a conduit 8 terminating in an inlet orifice 9 which communicates with a chamber 10 in the plug 6.
  • the gas nozzle assembly 3 carries a bi-metallic strip in the form of a bi-metallic disc 15, a two-part piston indicated generally by the reference numeral 20 is mounted within the gas burner body 2.
  • the piston 20 has a bore 21 and the piston 20 slidably engages over the gas nozzle assembly 3 and against the bimetallic disc 15, the bore 21 communicating directly with the bore 4a in the gas nozzle assembly 3.
  • the other end of the piston 20 slidably engages within the chamber 10.
  • An O-ring 22 ensures that the piston 20 engages within the chamber 10 in a gas-tight manner.
  • the bi-metallic disc 15 In the normal operating position as illustrated in Fig. 1, the bi-metallic disc 15 is in the retracted position and the piston 20 is lying such that the nitrile plug 23 is spaced apart from the inlet orifice 9 and thus gas will flow through the conduit 8 into the chamber 10 through the holes 24 and down the bore 21 where air will be drawn through the venturi 25 such that an air/gas mix is then delivered down the remainder of the bore 21 into the bore 4a and out the gas nozzle assembly 3.
  • FIGs. 3 to 6 more of the catalytic gas burner 1 is illustrated.
  • an adjustment ring 30 which can move the plug 6 into and out of the gas burner body 2. This may be achieved by, for example, having interengagable threads on the end plate 5 and plug 6 to control the distance between the inlet orifice 9 and the nitrile plug 23, thus controlling flow of gas from the conduit 8.
  • a gas storage chamber formed by a conventional pressurised gas cylinder 31 is shown mounted on the spigot 7.
  • Fig. 3 illustrates the switch 46 totally retracted in the OFF position and the off spring 41 acting to force the nitrile plug 23 hard against the inlet orifice 9 to shut off all gas.
  • the switch 46 is then moved to the position illustrated in Fig. 4 and the lever 42 is moved against the off-spring 41 so that the piston 20 lifts under the influence of the on-spring 40 off the inlet orifice 9.
  • the on-spring 40 is probably unnecessary in that the pressure of gas within the gas cylinder 31 would probably be sufficient to lift the piston 20.
  • the switch 46 is pushed to its third position so that the rocker arm 45 engages the plunger 36 and the piezo igniter unit will ignite the gas being delivered out the gas nozzle assembly 3 through the gas jet 4. This is illustrated in Fig. 5.
  • the switch 46 is retracted to the position illustrated in Fig. 4 and the catalytic gas burner 1 will continue to operate as long as the catalyst temperature does not fall below "light off" temperature.
  • the adjustment ring 30 When it is desired to increase or decrease somewhat the temperature the adjustment ring 30 may be used. It will be noted that the bi-metallic disc 15 in this way operates as a heat sensitive spring.
  • on-spring 40 and the off-spring 41 may be achieved in many ways including using the pressure of the gas housed in the cylinder 31.
  • the plug may be tapered to a needle point for interaction with the inlet orifice or otherwise shaped to improve control of the volume of gas supplied.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Gas Burners (AREA)

Abstract

L'invention concerne un thermostat (15) pour brûleurs (1) à gaz catalytiques. Ledit thermostat est un dispositif en ligne qui régule l'écoulement d'un gaz provenant d'une chambre de stockage vers une buse de décharge (3, 4) sans mettre en oeuvre des raccordements, par l'intermédiaire d'un ensemble à piston-soupape (20, 23).
PCT/IE1998/000014 1997-02-27 1998-02-23 Ameliorations apportees a des bruleurs a gaz catalytiques ou les concernant Ceased WO1998038460A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU66330/98A AU6633098A (en) 1997-02-27 1998-02-23 Improvements in and relating to catalytic gas burners

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IES970119 1997-02-27
IE970119 1997-02-27

Publications (1)

Publication Number Publication Date
WO1998038460A1 true WO1998038460A1 (fr) 1998-09-03

Family

ID=11041381

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IE1998/000014 Ceased WO1998038460A1 (fr) 1997-02-27 1998-02-23 Ameliorations apportees a des bruleurs a gaz catalytiques ou les concernant

Country Status (2)

Country Link
AU (1) AU6633098A (fr)
WO (1) WO1998038460A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL3480C (fr) *
JPS57157875A (en) * 1981-03-26 1982-09-29 Aisin Seiki Co Ltd Bimetallic temperature sensing valve
US4378907A (en) * 1978-12-06 1983-04-05 Aisin Seiki Kabushiki Kaisha Dual function thermal valve
JPS59119112A (ja) * 1982-12-25 1984-07-10 Matsushita Electric Ind Co Ltd 触媒燃焼器の保安装置
JPS60144510A (ja) * 1984-01-05 1985-07-30 Matsushita Electric Ind Co Ltd 触媒燃焼装置
JPS6233212A (ja) * 1985-08-01 1987-02-13 Matsushita Electric Ind Co Ltd 触媒燃焼装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL3480C (fr) *
US4378907A (en) * 1978-12-06 1983-04-05 Aisin Seiki Kabushiki Kaisha Dual function thermal valve
JPS57157875A (en) * 1981-03-26 1982-09-29 Aisin Seiki Co Ltd Bimetallic temperature sensing valve
JPS59119112A (ja) * 1982-12-25 1984-07-10 Matsushita Electric Ind Co Ltd 触媒燃焼器の保安装置
JPS60144510A (ja) * 1984-01-05 1985-07-30 Matsushita Electric Ind Co Ltd 触媒燃焼装置
JPS6233212A (ja) * 1985-08-01 1987-02-13 Matsushita Electric Ind Co Ltd 触媒燃焼装置

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 267 (M - 182) 25 December 1982 (1982-12-25) *
PATENT ABSTRACTS OF JAPAN vol. 008, no. 240 (M - 336) 6 November 1984 (1984-11-06) *
PATENT ABSTRACTS OF JAPAN vol. 009, no. 307 (M - 435) 4 December 1985 (1985-12-04) *
PATENT ABSTRACTS OF JAPAN vol. 011, no. 215 (M - 606) 11 July 1987 (1987-07-11) *

Also Published As

Publication number Publication date
AU6633098A (en) 1998-09-18

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