EP0023870B1 - Sicherheitssteuervorrichtungen für Gasventile - Google Patents

Sicherheitssteuervorrichtungen für Gasventile Download PDF

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Publication number
EP0023870B1
EP0023870B1 EP80401137A EP80401137A EP0023870B1 EP 0023870 B1 EP0023870 B1 EP 0023870B1 EP 80401137 A EP80401137 A EP 80401137A EP 80401137 A EP80401137 A EP 80401137A EP 0023870 B1 EP0023870 B1 EP 0023870B1
Authority
EP
European Patent Office
Prior art keywords
contactor
gate
breaker
excitation
period
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.)
Expired
Application number
EP80401137A
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English (en)
French (fr)
Other versions
EP0023870A1 (de
Inventor
Bernard Vergne
Claude Dauget
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.)
Chaffoteaux et Maury SAS
Original Assignee
Chaffoteaux et Maury SAS
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 Chaffoteaux et Maury SAS filed Critical Chaffoteaux et Maury SAS
Priority to AT80401137T priority Critical patent/ATE12682T1/de
Publication of EP0023870A1 publication Critical patent/EP0023870A1/de
Application granted granted Critical
Publication of EP0023870B1 publication Critical patent/EP0023870B1/de
Expired 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
    • F23N5/20—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
    • 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

Definitions

  • the invention relates to devices for the controlled control of the opening and closing of a valve for distributing a pressurized combustible gas supplying in particular a burner for a water heater, bath heater or central heating boiler with hot water, control to automatically result in the closing of said valve after a predetermined delay T o consecutive to its opening if the pressurized gas delivered by this valve has not been ignited in the meantime.
  • the invention aims, above all, to further increase the safety of these valve control devices, in the sense that any failure of such a device automatically results in the closing of the corresponding valve: such a failure is in in particular the undesirable "sticking" of any of the movable contacts of the second contactor in its position for which this contactor controls the supply of the valve, or even the rupture of the supply circuit of a protective circuit breaker.
  • the invention includes, apart from these main provisions, certain other provisions which are preferably used at the same time and which will be more explicitly discussed below.
  • the single figure of this drawing shows, very schematically, a fuel gas valve control device established in accordance with the invention.
  • the valve 1 to be controlled is suitable for distributing a pressurized combustible gas to the burner of a combustible gas appliance such as, in particular, a water heater, a bath heater or a central heating boiler with hot water.
  • a combustible gas appliance such as, in particular, a water heater, a bath heater or a central heating boiler with hot water.
  • This closure is itself subject to the circulation of water in the heating body of the gas appliance, circulation due to the drawing of hot water (in the case of water heaters or bath heaters) or to the in operation of a circulation pump 4 (case of central heating boilers): for this purpose, a vacuum created by this circulation is exploited by a differential valve system to actuate said switch 3.
  • valve 1 As soon as valve 1 is opened, it distributes a pressurized combustible gas to the appliance burner.
  • a flame detector 6 is therefore provided to check whether the ignition in question is effective or not and it is only in the case where this ignition is obtained before the expiration of the period T o that means controlled by the output of this detector maintains the electrical supply of the valve 1: time delay means or the like are provided to stop the application of the voltage V on the valve, due to the simple excitation of the contactor 2, at the end of the period T o .
  • the invention aims to ensure the total positive security of such an assembly in the sense that any failure automatically results in the closing of the valve.
  • the means controlled by the output of the flame detector 6 themselves comprise a second relay contactor 7 which is also suitable for applying a continuous or rectified voltage V 'to the valve 1 suitable for opening this valve, voltage having the same amplitude than the voltage V, but possibly generated in a different way.
  • this voltage V ' is that W generated by the network or sector 8 (generally known as an alternating voltage of amplitude 220 volts) and rectified through a unidirectional member 9 such as a diode.
  • the voltage V for its part, could be generated in a similar manner to the voltage V 'through an appropriate time-delay device.
  • this triggering must not be caused by simulation of a flame, that is to say by emission of an electrical signal falsely produced by the detector 6 even before the opening of the valve 1.
  • the first contact 7 1 is connected to the terminals of the sector 8 through a resting contact 2 1 of the contactor 2 and two diodes 15 and 16 in series, both mounted in the opposite direction to the diode 9, the diode 15 being furthermore mounted in parallel on valve 1.
  • the second contact 7 2 As for the second contact 7 2 , it is connected to the terminals of the sector 8 through also the contact 2 1 at rest and two other diodes 17 and 18 also connected in series and in the opposite direction to the diode 9.
  • the second contactor 7 When starting the installation, while the first contactor 2 is still at rest, the second contactor 7 must also be, the excitation of the latter being provided only after ignition of the gas distributed by the valve 1 , then detection of this ignition at 6, which supposes that said valve is opened by the excitation of the first contactor 2.
  • a repairer must then be called in to restart the installation after locating and eliminating the fault.
  • the control which has just been described can be carried out immediately after closing of the general switch 19 or after closing of the switch 3, but before tripping of the first contactor 2, a small delay t o , for example of the order of the second, being advantageously provided for this purpose between these last two commands.
  • a diode 20, mounted in parallel on the capacitor 10, in the same direction as the diode 15, makes it possible to detect, by breaking the fuse 14, an undesirable "sticking" of the contact 2 2 of the contactor 2 in its working position through the succession of the following components: diode 11, contact 7 1 at work, diode 16 and contact 2 1 at rest.
  • valve 1 has been closed at the end of the period T o which is shorter than the period T, and begins at the same time as the latter, but the installation remains energized: it must then be disconnected and trigger an alert to make external intervention necessary to repair the fault (which may be due to a phenomenon other than an ignition fault, for example a lack of gas).
  • a circuit breaker 21 is provided for this purpose, in particular of the thermal or timed type, having the same role as the fuse 14 above and the sensitive element of which (at temperature or time) is supplied as soon as the first contactor 2 is tripped. from sector 8 through contact 2 1 at work, a diode 22 and contact 7 2 at rest.
  • the coil of contactor 2 is electrically energized, under the control of switch 3, from the secondary of a transformer 23 whose primary is supplied by sector 8.
  • This supply is carried out through an opto-electronic barrier member shown diagrammatically in the drawing by a photothyristor 24, the door of which is connected to a resistor 25.
  • This barrier can only be removed if the photosensitive element 24 is illuminated from a lamp 26, such as a photoluminescent diode, which lamp can only be supplied electrically, from the sector, only through the element. sensitive of the circuit breaker 21, as well as through the diode 22 and the contact 7 2 at rest.
  • a lamp 26 such as a photoluminescent diode, which lamp can only be supplied electrically, from the sector, only through the element. sensitive of the circuit breaker 21, as well as through the diode 22 and the contact 7 2 at rest.
  • This optical coupling between the lamp 26 and the photosensitive element 24, shown diagrammatically by the broken arrow 0 makes it possible to selectively and surely transmit an instruction from a medium voltage circuit (220 Volts) to a low voltage circuit (for example 24 Volts), without causing any disturbance to these circuits.
  • the first contactor 2 can only be energized if the circuit breaker 21 and its supply circuit are intact and ready to fulfill their protection mission, which constitutes a new important advantage of the invention.
  • the invention is in no way limited to those of its modes of application and embodiments which have been more especially envisaged; on the contrary, it embraces all the variants, in particular those where the photosensitive element 24 is not a photothyristor, but a phototransistor, a resistance then being provided between the two pads intended to interact alternately with the movable contact 7 2 according to the position of the latter.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Pipeline Systems (AREA)
  • Control Of Combustion (AREA)
  • Feeding And Controlling Fuel (AREA)

Claims (4)

1. Vorrichtung zur kontrollierten Steuerung des Öffnens eines Ventils (1) zum Zuführen eines unter Druck stehenden Brenngases, bei welcher die Steuerung durch das Schließen eines elektrischen Schalters (3) veranlaßt wird und normalerweise nacheinander die Erregung eines zum Öffnen des Ventils durch Speisung desselben mit einer elektrischen Spannung (von 10) bestimmten ersten Relais (2), die Betätigung einer Zündvorrichtung (5) für das Brenngas, den Nachweis (durch 6) der dem gezündeten Gas entsprechenden Flamme und ein automatisches Schließen des Ventils (1), wenn dieser Nachweis nicht bis zum Ende einer Zeitspanne To nach dem Öffnen des Ventils erfolgt, bzw. im gegenteiligen Fall die Erregung eines zweiten Relais (7) mit mehreren beweglichen Kontakten (71, 72) bewirkt, das so angeordnet ist, daß es die Zündvorrichtung (5) abschaltet und die elektrische Speisung des Ventils (1) über die Zeitspanne To hinaus über Kontakte (21,71) und einen Gleichrichter (9) mit gleichgerichteter Wechselspannung (aus 8) aufrechterhält, wobei ein Sicherungselement (14) derart angeordnet ist, daß es anspricht und die erwähnte Speisung (aus 8) unterbricht, wenn einer der beweglichen Kontakte (71, 72) des zweiten Relais (7) bei der Inbetriebnahme eine falsche Lage einnimmt, dadurch gekennzeichnet, daß zur Automatisierung des Ansprechens des Sicherungselementes (14) im Falle, daß irgendeiner der beweglichen Kontakte (71, 72) des zweiten Relais (7) seine Arbeitslage einnimmt, während sich das erste Relais (2) im Ruhezustand befindet, jeder der beweglichen Kontakte (71, 72) in seiner Arbeitslage in Reihe mit der Spannungsquelle (8), dem Sicherungselement (14), einem geschlossenen Kontakt (21) des ersten Relais (2) in dessen Ruhezustand und mit Gleichrichtern (15, 16 bzw. 17, 18) liegt, die gleichgerichteten Strom in einer Richtung durchlassen, welche gegensinnig zu jener ist, die normalerweise die Speisung des Ventiles (1) über jede Zeitspanne (To) hinaus bewirkt.
2. Steuervorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sie einen Sicherungs-Ausschalter (21) aufweist, der so angeordnet ist, daß er am Ende einer Zeitspanne T1 im Anschluß an die Erregung des ersten Relais (2) ausgelöst wird, wenn das zweite Relais (7) innerhalb dieser Zeitspanne T1 nicht erregt worden ist, und daß der Kreis, welcher nach dem Schließen des Schalters (3) die Erregung des ersten Relais (2) bewirkt, ein elektrisches Sperrorgan (24) enthält, das nur durch Beleuchtung seitens einer Lichtquelle (26) leitend gemacht werden kann, welche ihrerseits elektrisch über das empfindliche Element des Sicherungs-Ausschalters (21) gespeist wird.
3. Steuervorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die elektrische Speisung des Sicherungs-Ausschalters (21) über einen Ruhekontakt (72) des zweiten Relais (7) erfolgt.
4. Steuervorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die elektrische Speisung des Ventils (1) bei Erregung des ersten Relais (2) durch eine einfache Entladung eines Kondensators (10) erfolgt.
EP80401137A 1979-08-01 1980-07-31 Sicherheitssteuervorrichtungen für Gasventile Expired EP0023870B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80401137T ATE12682T1 (de) 1979-08-01 1980-07-31 Sicherheitssteuervorrichtungen fuer gasventile.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7919806 1979-08-01
FR7919806A FR2462660A1 (fr) 1979-08-01 1979-08-01 Perfectionnements aux dispositifs pour commander avec securite des vannes de gaz

Publications (2)

Publication Number Publication Date
EP0023870A1 EP0023870A1 (de) 1981-02-11
EP0023870B1 true EP0023870B1 (de) 1985-04-10

Family

ID=9228532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80401137A Expired EP0023870B1 (de) 1979-08-01 1980-07-31 Sicherheitssteuervorrichtungen für Gasventile

Country Status (5)

Country Link
EP (1) EP0023870B1 (de)
JP (1) JPS5623632A (de)
AT (1) ATE12682T1 (de)
DE (1) DE3070452D1 (de)
FR (1) FR2462660A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58152579A (ja) * 1982-03-08 1983-09-10 株式会社マグジヤン 麻雀装置
JPS60249987A (ja) * 1984-05-23 1985-12-10 都島興産株式会社 麻雀装置
CN113883415B (zh) * 2021-09-16 2024-02-20 杨春顺 一种燃气自动断路器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3270800A (en) * 1964-12-07 1966-09-06 Honeywell Inc Burner control apparatus
DE2442997C2 (de) * 1974-09-07 1976-09-16 Danfoss As Steuergeraet zum zuenden und ueberwachen einer feuerungsanlage
CH582333A5 (de) * 1975-03-04 1976-11-30 Landis & Gyr Ag

Also Published As

Publication number Publication date
JPS5623632A (en) 1981-03-06
FR2462660A1 (fr) 1981-02-13
FR2462660B1 (de) 1982-09-03
DE3070452D1 (en) 1985-05-15
ATE12682T1 (de) 1985-04-15
EP0023870A1 (de) 1981-02-11

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