EP0822376A2 - Safety device for a burner - Google Patents

Safety device for a burner Download PDF

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Publication number
EP0822376A2
EP0822376A2 EP97113092A EP97113092A EP0822376A2 EP 0822376 A2 EP0822376 A2 EP 0822376A2 EP 97113092 A EP97113092 A EP 97113092A EP 97113092 A EP97113092 A EP 97113092A EP 0822376 A2 EP0822376 A2 EP 0822376A2
Authority
EP
European Patent Office
Prior art keywords
burner
fuel
pressure sensor
test unit
valves
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Withdrawn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
EP97113092A
Other languages
German (de)
French (fr)
Other versions
EP0822376A3 (en
Inventor
Henrich Hartmut
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.)
Elster Kromschroeder GmbH
Original Assignee
G Kromschroeder AG
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 G Kromschroeder AG filed Critical G Kromschroeder AG
Priority to DE29724487U priority Critical patent/DE29724487U1/en
Publication of EP0822376A2 publication Critical patent/EP0822376A2/en
Publication of EP0822376A3 publication Critical patent/EP0822376A3/en
Withdrawn legal-status Critical Current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
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/04—Measuring pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/18—Detecting fluid leaks

Definitions

  • the invention relates to a safety arrangement for a burner connected to a fuel line connected and controlled by a burner control, with two valves arranged one behind the other in the fuel line and with actuators are provided, a pressure sensor for detecting the pressure between the Valves, at least one leak test device connected to the pressure sensor and the actuators for the valves are connected and at least one fuel test unit, to the burner control and to the upstream in the direction of flow Valve is connected.
  • the leak test unit and the fuel test unit are circuits that meet the requirements the DIN standards for fail safety are sufficient.
  • the leak test unit is used to check the tightness of the two valves.
  • a suitable program sequence checks the tightness of the valves by means of time measurement the pressure drop or increase within certain test times after a short period Open individual valves and calculate and check the maximum allowable Leakage rate at these valves. Such a method is described in DE 37 08 471.
  • the fuel test unit is used in the burner control when there is a heat request only release the program sequence at the start of the burner when a Sensor reports the presence of fuel.
  • the fuel test unit effects a shutdown of the burner if the signal during operation of the sensor fails. With the presence of the fuel, an automatic Allows the burner to restart. In addition, if there is insufficient Fuel pressure prevents a possible pollutant-rich combustion.
  • the invention is therefore based on the object of simpler and less expensive To create security arrangement.
  • the safety arrangement mentioned at the outset is according to the invention characterized in that the fuel test unit to the pressure sensor the leak test unit is connected.
  • the output signal of the pressure sensor is therefore used several times by not only used for the leak test unit, but also for the fuel test unit the relevant requirements of the DIN standards are met.
  • a fuel gas line 1 leads to a gas burner 2 by a burner control 3 is controlled.
  • two valves 4 are arranged, each having an actuator 5.
  • a pressure sensor 6 which detects the pressure in the fuel gas line 1 recorded.
  • the pressure sensor 6 is connected to a leak test unit 7, which in turn is connected to the Actuators 5 for the valves 4 is connected.
  • the safety arrangement further comprises a fuel test unit 8 which is connected to the burner control 3 and connected to the pressure sensor 6.
  • the signal of the pressure sensor 6 is thus used several times, and specifically at different ones Operating states.
  • the burner control 3 turns on Commissioning program continued. If the pressure sensor 6 reports no signal the inlet valve 4 is opened for a short time in order to reduce the fuel pressure to the sensor. If the pressure sensor 6 still reports no signal, is the inlet valve 4 is closed again and the electric burner control starts a suitable time delay to this program section after this Repeat time cyclically.
  • the leak test unit 8 can after the fuel shortage check before the burner start or be activated after the burner has run.
  • the pressure sensor can also be designed as a pressure switch.
  • the control of the gas burner as well as the tests for leaks and for the presence of fuel can be from a single control unit in the form of a microprocessor with the associated Circuits are carried out.

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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)
  • Feeding And Controlling Fuel (AREA)

Abstract

The burner (2) is connected to a fuel delivery line (1) and is controlled by a burner controller (3). Two valves (4) connected in the fuel delivery line have control elements (5). A pressure sensor (6) detects the pressure between the valves. At least one leak test unit (7) is connected to the pressure sensor and to the valve control elements. At least one fuel test unit (8) is connected to the controller, to the upstream valve and to the pressure sensor.

Description

Die Erfindung betrifft eine Sicherheitsanordnung für einen Brenner, der an eine Brennstoffleitung angeschlossen ist und der mittels einer Brennersteuerung gesteuert wird, mit zwei hintereinander in der Brennstoffleitung angeordneten Ventilen, die mit Stellgliedern versehen sind, einem Drucksensor zum Erfassen des Druckes zwischen den Ventilen, mindestens einer Dichtheit-Prüfeinrichtung, die an den Drucksensor und an die Stellglieder für die Ventile angeschlossen ist und mindestens eine Brennstoff-Prüfeinheit, die an die Brennersteuerung und an das in Strömungsrichtung stromauf liegende Ventil angeschlossen ist.The invention relates to a safety arrangement for a burner connected to a fuel line connected and controlled by a burner control, with two valves arranged one behind the other in the fuel line and with actuators are provided, a pressure sensor for detecting the pressure between the Valves, at least one leak test device connected to the pressure sensor and the actuators for the valves are connected and at least one fuel test unit, to the burner control and to the upstream in the direction of flow Valve is connected.

Die Dichtheit-Prüfeinheit und die Brennstoff-Prüfeinheit sind Schaltungen, die den Anforderungen der DIN-Normen an die Fehlersicherheit genügen.The leak test unit and the fuel test unit are circuits that meet the requirements the DIN standards for fail safety are sufficient.

Die Dichtheit-Prüfeinheit dient dazu, den Dichtsitz der beiden Ventile zu prüfen. Ein geeigneter Programmablauf überprüft den Dichtsitz der Ventile mittels der Zeitmessung des Druckabfalls bzw. Anstieges innerhalb bestimmter Prüfzeiten nach kurzzeitigem Öffnen einzelner Ventile und der Errechnung und Überprüfung der maximalen zulässigen Leckrate an diesen Ventilen. Ein derartiges Verfahren ist in der DE 37 08 471 beschrieben.The leak test unit is used to check the tightness of the two valves. A A suitable program sequence checks the tightness of the valves by means of time measurement the pressure drop or increase within certain test times after a short period Open individual valves and calculate and check the maximum allowable Leakage rate at these valves. Such a method is described in DE 37 08 471.

Die Brennstoff-Prüfeinheit dient dazu, in der Brennersteuerung bei einer Wärmeanforderung den Programmablauf zum Start des Brenners erst dann freizugeben, wenn ein Sensor das Vorhandensein von Brennstoff meldet. Außerdem bewirkt die Brennstoff-Prüfeinheit eine Abschaltung des Brenners, wenn während des Betriebes das Signal des Sensors ausfällt. Bei Wiedervorhandensein des Brennstoffes wird ein automatisches Wiederanlaufen des Brenners ermöglicht. Außerdem wird bei nicht ausreichendem Brennstoffdruck eine dann mögliche schadstoffreiche Verbrennung verhindert.The fuel test unit is used in the burner control when there is a heat request only release the program sequence at the start of the burner when a Sensor reports the presence of fuel. In addition, the fuel test unit effects a shutdown of the burner if the signal during operation of the sensor fails. With the presence of the fuel, an automatic Allows the burner to restart. In addition, if there is insufficient Fuel pressure prevents a possible pollutant-rich combustion.

Bei den bisher bekannten Brennstoffmangel-Prüfverfahren ist es üblich, der Brennstoff-Prüfeinheit einen gesonderten Drucksensor zuzuordnen, der stromauf der Ventile angeordnet ist. Dies bedingte einen erheblichen apparativen Aufwand, verbunden mit einem erhöhten Verdrahtungsaufwand, wodurch zusätzliche Kosten entstehen.In the previously known fuel shortage test methods, it is common for the fuel test unit assign a separate pressure sensor, which is arranged upstream of the valves is. This required a considerable amount of equipment, combined with one increased wiring effort, which creates additional costs.

Der Erfindung liegt daher die Aufgabe zugrunde, eine einfachere und kostengünstigere Sicherheitsanordnung zu schaffen. The invention is therefore based on the object of simpler and less expensive To create security arrangement.

Zur Lösung dieser Aufgabe ist die eingangs genannte Sicherheitsanordnung erfindungsgemäß dadurch gekennzeichnet, daß die Brennstoff-Prüfeinheit an den Drucksensor der Dichtheits-Prüfeinheit angeschlossen ist.To achieve this object, the safety arrangement mentioned at the outset is according to the invention characterized in that the fuel test unit to the pressure sensor the leak test unit is connected.

Das Ausgangssignal des Drucksensors wird also mehrfach ausgenutzt, indem es nicht nur für die Dichtheit-Prüfeinheit, sondern auch für die Brennstoff-Prüfeinheit genutzt wird, wobei die diesbezüglichen Anforderungen der DIN-Normen erfüllt werden.The output signal of the pressure sensor is therefore used several times by not only used for the leak test unit, but also for the fuel test unit the relevant requirements of the DIN standards are met.

Der Verzicht auf mindestens einen zusätzlichen Drucksensor und den zugehörigen Verdrahtungsaufwand führt zu einer beträchtlichen Kostensenkung.Dispensing with at least one additional pressure sensor and the associated one Wiring costs lead to a considerable reduction in costs.

Die Erfindung wird im folgenden anhand eines bevorzugten Ausführungsbeispiels im Zusammenhang mit der beiliegenden Zeichnung näher erläutert. Die Zeichnung zeigt in schematischer Darstellung die Sicherheitsanordnung.The invention is described below with reference to a preferred embodiment Connection with the accompanying drawing explained. The drawing shows the safety arrangement in a schematic representation.

Eine Brenngasleitung 1 führt zu einem Gasbrenner 2, der von einer Brennersteuerung 3 gesteuert wird. Aus Sicherheitsgründen sind in der Brenngasleitung hintereinander zwei Ventile 4 angeordnet, die jeweils ein Stellglied 5 aufweisen. Zwischen den beiden Ventilen 4 befindet sich ein Drucksensor 6, der den Druck in der Brenngasleitung 1 erfaßt.A fuel gas line 1 leads to a gas burner 2 by a burner control 3 is controlled. For safety reasons there are one after the other in the fuel gas line two valves 4 are arranged, each having an actuator 5. Between two valves 4 there is a pressure sensor 6, which detects the pressure in the fuel gas line 1 recorded.

Der Drucksensor 6 ist mit einer Dicht-Prüfeinheit 7 verbunden, die wiederum an die Stellglieder 5 für die Ventile 4 angeschlossen ist.The pressure sensor 6 is connected to a leak test unit 7, which in turn is connected to the Actuators 5 for the valves 4 is connected.

Die Sicherheitsanordnung umfaßt ferner eine Brennstoff-Prüfeinheit 8, die an die Brennersteuerung 3 sowie an den Drucksensor 6 angeschlossen ist.The safety arrangement further comprises a fuel test unit 8 which is connected to the burner control 3 and connected to the pressure sensor 6.

Das Signal des Drucksensors 6 wird also mehrfach ausgenutzt, und zwar bei verschiedenen Betriebszuständen.The signal of the pressure sensor 6 is thus used several times, and specifically at different ones Operating states.

Beim Start des Brenners 2 wird zunächst das Vorhandensein von Brennstoff geprüft. Falls der Drucksensor 6 schon ein Signal meldet, wird in der Brennersteuerung 3 ein Inbetriebsetzungsprogramm fortgesetzt. Falls der Drucksensor 6 kein Signal meldet wird das eingangsseitige Ventil 4 für eine kurze Zeit geöffnet, um den Brennstoffdruck an den Sensor zu leiten. Falls der Drucksensor 6 immer noch kein Signal meldet, wird das eingangsseitige Ventil 4 wieder geschlossen und die elektrische Brennersteuerung startet eine geeignete Zeitverzögerung, um diesen Programmschnitt nach Ablauf dieser Zeit zyklisch zu wiederholen. When the burner 2 starts, the presence of fuel is first checked. If the pressure sensor 6 already reports a signal, the burner control 3 turns on Commissioning program continued. If the pressure sensor 6 reports no signal the inlet valve 4 is opened for a short time in order to reduce the fuel pressure to the sensor. If the pressure sensor 6 still reports no signal, is the inlet valve 4 is closed again and the electric burner control starts a suitable time delay to this program section after this Repeat time cyclically.

Fällt im laufenden Brennerbetrieb das Signal des Drucksensors 6 aus, schaltet die Brennstoff-Prüfeinheit 8 den Brenner 2 sofort aus. Danach läuft das Verfahren wie unter Brennerstart beschrieben ab.If the signal of the pressure sensor 6 fails while the burner is running, it switches Fuel test unit 8 the burner 2 immediately. Then the procedure is as below Burner start described from.

Die Dichtheit-Prüfeinheit 8 kann nach der Brennstoffmangelüberprüfung vor dem Brennerstart oder auch nach dem Brennerlauf in Funktion gesetzt werden.The leak test unit 8 can after the fuel shortage check before the burner start or be activated after the burner has run.

Im Rahmen der Erfindung sind durchaus Abwandlungsmöglichkeiten gegeben. So kann der Drucksensor auch als Druckwächter ausgebildet sein. Die Steuerung des Gasbrenners sowie die Prüfungen auf Dichtheit und auf Vorhandensein von Brennstoff kann von einer einzigen Steuereinheit in Form eines Mikroprozessors mit den dazugehörigen Schaltkreisen durchgeführt werden.In the context of the invention, there are quite a number of possible modifications. So can the pressure sensor can also be designed as a pressure switch. The control of the gas burner as well as the tests for leaks and for the presence of fuel can be from a single control unit in the form of a microprocessor with the associated Circuits are carried out.

Claims (1)

Sicherheitsanordnung für einen Brenner (2), der an eine Brennstoffleitung (1) angeschlossen ist und der mittels einer Brennersteuerung (3) gesteuert wird, mit zwei hintereinander in der Brennstoffleitung angeordneten Ventilen (4), die mit Stellgliedern (5) versehen sind, einem Drucksensor (6) zum Erfassen des Druckes zwischen den Ventilen (4), mindestens einer Dichtheit-Prüfeinheit (7), die an den Drucksensor und an die Stellglieder für die Ventile angeschlossen ist und mindestens eine Brennstoff-Prüfeinheit (8), die an die Brennersteuerung (3) und an das in Strömungsrichtung stromauf liegende Ventil angeschlossen ist, dadurch gekennzeichnet,
daß die Brennstoff-Prüfeinheit (8) an den Drucksensor (6) der Dichtheits-Prüfeinheit (7) angeschlossen ist.Safety arrangement for a burner (2) which is connected to a fuel line (1) and which is controlled by means of a burner control (3) two valves (4) arranged one behind the other in the fuel line and provided with actuators (5), a pressure sensor (6) for detecting the pressure between the valves (4), at least one leak test unit (7) which is connected to the pressure sensor and to the actuators for the valves and at least one fuel test unit (8) which is connected to the burner control (3) and to the valve located upstream in the flow direction, characterized,
that the fuel test unit (8) is connected to the pressure sensor (6) of the leak test unit (7).
EP97113092A 1996-07-31 1997-07-30 Safety device for a burner Withdrawn EP0822376A3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE29724487U DE29724487U1 (en) 1996-07-31 1997-07-30 Safety arrangement for a burner

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19630875 1996-07-31
DE19630875A DE19630875A1 (en) 1996-07-31 1996-07-31 Safety arrangement for a burner

Publications (2)

Publication Number Publication Date
EP0822376A2 true EP0822376A2 (en) 1998-02-04
EP0822376A3 EP0822376A3 (en) 1999-02-24

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005033611B3 (en) * 2005-07-14 2006-10-19 Honeywell Technologies S.A.R.L. Safe control of gas burner operation, blocks ignition when leakage is detected at a point between control valve and safety shut-off valve
US9074770B2 (en) 2011-12-15 2015-07-07 Honeywell International Inc. Gas valve with electronic valve proving system
EP2738468A3 (en) * 2012-11-30 2017-04-26 Azbil Corporation Valve leak detecting method and combustion equipment
US9645584B2 (en) 2014-09-17 2017-05-09 Honeywell International Inc. Gas valve with electronic health monitoring
US9657946B2 (en) 2012-09-15 2017-05-23 Honeywell International Inc. Burner control system
US9683674B2 (en) 2013-10-29 2017-06-20 Honeywell Technologies Sarl Regulating device
US9835265B2 (en) 2011-12-15 2017-12-05 Honeywell International Inc. Valve with actuator diagnostics
US9841122B2 (en) 2014-09-09 2017-12-12 Honeywell International Inc. Gas valve with electronic valve proving system
US9846440B2 (en) 2011-12-15 2017-12-19 Honeywell International Inc. Valve controller configured to estimate fuel comsumption
US9851103B2 (en) 2011-12-15 2017-12-26 Honeywell International Inc. Gas valve with overpressure diagnostics
US9995486B2 (en) 2011-12-15 2018-06-12 Honeywell International Inc. Gas valve with high/low gas pressure detection
US10024439B2 (en) 2013-12-16 2018-07-17 Honeywell International Inc. Valve over-travel mechanism
US10422531B2 (en) 2012-09-15 2019-09-24 Honeywell International Inc. System and approach for controlling a combustion chamber
US10503181B2 (en) 2016-01-13 2019-12-10 Honeywell International Inc. Pressure regulator
US10564062B2 (en) 2016-10-19 2020-02-18 Honeywell International Inc. Human-machine interface for gas valve
US10697815B2 (en) 2018-06-09 2020-06-30 Honeywell International Inc. System and methods for mitigating condensation in a sensor module
US10697632B2 (en) 2011-12-15 2020-06-30 Honeywell International Inc. Gas valve with communication link
US11073281B2 (en) 2017-12-29 2021-07-27 Honeywell International Inc. Closed-loop programming and control of a combustion appliance

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DE19819339A1 (en) * 1998-04-30 1999-12-09 Lactec Gmbh Method for leak-testing valve in color changer, for series processing of different types of varnishes
DE19831067C2 (en) * 1998-07-10 2000-05-31 Honeywell Bv Procedure for leak testing of gas valves
DE19905667A1 (en) * 1999-02-11 2000-09-07 Abb Patent Gmbh Tightness test of gas lines testing by flushing over monitored line section by test gas over bypass and measuring pressure drop measurement and then closing bypass again and reconnecting back that partial line section
DE102011000113B4 (en) 2011-01-13 2013-08-14 Karl Dungs Gmbh & Co. Kg Valve combination with improved test routine
US8899264B2 (en) 2011-12-15 2014-12-02 Honeywell International Inc. Gas valve with electronic proof of closure system
US8905063B2 (en) 2011-12-15 2014-12-09 Honeywell International Inc. Gas valve with fuel rate monitor
US8839815B2 (en) 2011-12-15 2014-09-23 Honeywell International Inc. Gas valve with electronic cycle counter
US8947242B2 (en) 2011-12-15 2015-02-03 Honeywell International Inc. Gas valve with valve leakage test

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Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005033611B3 (en) * 2005-07-14 2006-10-19 Honeywell Technologies S.A.R.L. Safe control of gas burner operation, blocks ignition when leakage is detected at a point between control valve and safety shut-off valve
US9074770B2 (en) 2011-12-15 2015-07-07 Honeywell International Inc. Gas valve with electronic valve proving system
US9835265B2 (en) 2011-12-15 2017-12-05 Honeywell International Inc. Valve with actuator diagnostics
US10851993B2 (en) 2011-12-15 2020-12-01 Honeywell International Inc. Gas valve with overpressure diagnostics
US9846440B2 (en) 2011-12-15 2017-12-19 Honeywell International Inc. Valve controller configured to estimate fuel comsumption
US9851103B2 (en) 2011-12-15 2017-12-26 Honeywell International Inc. Gas valve with overpressure diagnostics
US9995486B2 (en) 2011-12-15 2018-06-12 Honeywell International Inc. Gas valve with high/low gas pressure detection
US10697632B2 (en) 2011-12-15 2020-06-30 Honeywell International Inc. Gas valve with communication link
US10422531B2 (en) 2012-09-15 2019-09-24 Honeywell International Inc. System and approach for controlling a combustion chamber
US11421875B2 (en) 2012-09-15 2022-08-23 Honeywell International Inc. Burner control system
US9657946B2 (en) 2012-09-15 2017-05-23 Honeywell International Inc. Burner control system
EP2738468A3 (en) * 2012-11-30 2017-04-26 Azbil Corporation Valve leak detecting method and combustion equipment
US9683674B2 (en) 2013-10-29 2017-06-20 Honeywell Technologies Sarl Regulating device
US10215291B2 (en) 2013-10-29 2019-02-26 Honeywell International Inc. Regulating device
US10024439B2 (en) 2013-12-16 2018-07-17 Honeywell International Inc. Valve over-travel mechanism
US9841122B2 (en) 2014-09-09 2017-12-12 Honeywell International Inc. Gas valve with electronic valve proving system
US10203049B2 (en) 2014-09-17 2019-02-12 Honeywell International Inc. Gas valve with electronic health monitoring
US9645584B2 (en) 2014-09-17 2017-05-09 Honeywell International Inc. Gas valve with electronic health monitoring
US10503181B2 (en) 2016-01-13 2019-12-10 Honeywell International Inc. Pressure regulator
US10564062B2 (en) 2016-10-19 2020-02-18 Honeywell International Inc. Human-machine interface for gas valve
US11073281B2 (en) 2017-12-29 2021-07-27 Honeywell International Inc. Closed-loop programming and control of a combustion appliance
US10697815B2 (en) 2018-06-09 2020-06-30 Honeywell International Inc. System and methods for mitigating condensation in a sensor module

Also Published As

Publication number Publication date
DE19630875A1 (en) 1998-02-05
EP0822376A3 (en) 1999-02-24

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