EP1528320B1 - Gas valve - Google Patents

Gas valve Download PDF

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Publication number
EP1528320B1
EP1528320B1 EP04024721A EP04024721A EP1528320B1 EP 1528320 B1 EP1528320 B1 EP 1528320B1 EP 04024721 A EP04024721 A EP 04024721A EP 04024721 A EP04024721 A EP 04024721A EP 1528320 B1 EP1528320 B1 EP 1528320B1
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EP
European Patent Office
Prior art keywords
valve
gas
gas valve
ignition
hydraulically controlled
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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.)
Not-in-force
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EP04024721A
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German (de)
French (fr)
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EP1528320A1 (en
Inventor
Thomas Schmidbauer
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Vaillant GmbH
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Vaillant GmbH
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Application filed by Vaillant GmbH filed Critical Vaillant GmbH
Priority to PL04024721T priority Critical patent/PL1528320T3/en
Priority to SI200431642T priority patent/SI1528320T1/en
Publication of EP1528320A1 publication Critical patent/EP1528320A1/en
Application granted granted Critical
Publication of EP1528320B1 publication Critical patent/EP1528320B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2900/00—Special features of, or arrangements for fuel supplies
    • F23K2900/05001—Control or safety devices in gaseous or liquid fuel supply lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/18—Groups of two or more valves

Definitions

  • the invention relates to a hydraulic regulated gas valve for a fuel gas heated continuous water heater.
  • Such gas fittings are characterized in that they adjust the amount of fuel gas that reaches a burner depending on the amount of water to be heated and a knob.
  • an amplification factor fuel gas volume flow to water volume flow
  • Such fittings are made, for example EP 1 353 126 A and from DE 4 316 779 A known.
  • these gas fittings must have at least two sealing valves which have different control signals.
  • the ionization current in a flame or a thermoelectric voltage caused by the flame is used as a control signal. If a flame is present on the burner surface, an ionization current can be detected in the area of the flame. With this ionization current, a valve, the safety valve, can be opened by means of a coil.
  • the other sealing valve is usually the water shortage valve. In this valve, a stroke equivalent to the water volume flow is generated in a water switch. By means of this lifting movement, the water shortage valve can be opened and thus a fuel gas equivalent to the water volume flow can flow through the gas fitting.
  • gas valves often have a valve with which an amplification factor between the fuel gas volume flow and the water volume flow can be set. This adjustment is usually done manually by the operator, who often uses a rotary knob and diverter to continuously open or close a linear valve. As a result, the outlet temperature of the continuous water heater is changed.
  • Gas fittings for fuel gas heated continuous water heaters are usually relatively complex, since the various functions are achieved by a mechanism with many deflections.
  • the aim of the invention is to provide a gas valve for fuel gas heated continuous water heater, which is characterized by simple and reliable structure.
  • the ignition gas guide and seal should be simplified.
  • the fuel gas is passed to the pilot gas valve through the interior of the main gas valve. Since this is sealed from the environment, small leaks would not result in fuel gas leakage into the environment.
  • the ignition gas is passed through the same guide as the mechanical actuating mechanism of the safety valve.
  • existing holes and cavities are used twice.
  • Another advantage of an advantageous embodiment of the invention is according to claim 5, that the gas valve at the factory setting or on site without installation of an additional throttle by an existing, from the outside - to compensate for manufacturing tolerances and to different performance variables, network pressures and gas types - adjustable valve can be adjusted.
  • the elimination of an additional throttle the pressure drop of the gas valve is kept to a minimum.
  • the nominal power and the partial load can be adjusted.
  • only a universal power preselector valve is installed, which in the case of a gas type change at the customer no longer needs to be removed and replaced. This can save costs and the device is much more attractive for the customer due to the increased flexibility.
  • the power preselector valve cone is infinitely and sensitively displaceable and thus adjustable. This is possible because a Axialschalt consultancy can move on a shaft by turning the adjusting screw via a clamp.
  • the adjusting screw is located coaxially with the gas control mechanism directly behind the gas button, so that its action is self-explanatory.
  • Fig. 1 to Fig. 16 the gas valve according to the invention in various operating situations and details thereof.
  • FIG. 1 shows the gas valve according to the invention in the diagonal plan view with the control knob 1 at the front, the side receiving bore 43 for the water switch, the rear gas inlet 44, the also rear thermomagnet 48, the gas outlet 45 to the burner, the measuring nipple 47 for measuring the inlet pressure, the Measuring nipple 39 for measuring the burner pressure and the ignition gas outlet 26.
  • the FIGS. 2a and 2b show the gas valve according to the invention from other perspectives also in diagonal plan view.
  • FIG. 3 shows the gas valve according to the invention in section A - A according to FIG. 1 ,
  • the gas valve is in the initial state, in which no fuel gas flows.
  • the control knob 1 is in the starting position.
  • the safety valve 2 with the thermomagnet 48, the Zündgasventil 3, the main gas valve 4 for power selection, which includes a buttervorinesventilteller 23, and the water shortage valve 5, not in FIG. 3 but in eg FIG. 8 can be seen, are closed.
  • the gas inlet 44 which is in FIG. 3 can not be seen, fuel gas is on the left in front of the safety valve 2.
  • FIG. 4 is brought by turning counterclockwise the control knob 1 counterclockwise, the gas valve in the ignition position.
  • the rotational movement of the control knob 1 is transmitted to a radial contact piece 10.
  • the radial contact piece 10 has a control cam 21 (see. FIG. 14 ), whereby the radial increase of the control cam 21 causes a counterclockwise rotation of the Zündgasventiltellers 11 against the spring 12 in a rotational movement.
  • a Zündgasfilter 13 is slightly compressed.
  • a flat gasket 14 lifts off from a Zündgasventilsitz 15.
  • FIG. 5 shows that in the next operating step, the control knob 1 is pressed with the shaft 6 against the spring 16.
  • the adjusting screw 8, the bracket 17 (see also Fig. 15 ), the radial switch 10, the pin 7 and a Axialschalt choir 9 are also moved.
  • the pin 7 strikes the valve plate 18 of the thermomagnet 48 and lifts against the pressure of the spring 49, the gasket 19 from the valve seat 20 from.
  • the fuel gas can now flow through a gap 22 centrally through the power preselector valve plate 23 into the chamber 24. From there, the fuel gas through the gap 25, the path via the Zündgasfilter 13 to Zündgasausgang 26th
  • the ignition gas burner can now be ignited. After the ignition gas has been ignited at the pilot gas burner, a thermal current can be tapped from the flame after a short waiting time. This thermo-current is passed to the thermomagnet 48, whereby the thermomagnet 48 pulls the valve plate 18 to the thermomagnet 48 against the spring 49.
  • the control knob 1 can now be released by the operator. As a result, slide the parts control knob 1, shaft 6, Radialschalt Science 10, adjusting screw 8, bracket 17, Axialschalt fabrics 9 and pin 7 due to the force of the spring 16 back to the starting position. The ignition gas continues to flow.
  • the Axialschalthggse 27 Since sliding blocks 28 of the Axialschalthggse 27 (see. Fig. 16 ) sitting in longitudinally extending grooves in the housing 30, only axial movement of the Axialschalthggse 27 is possible.
  • the Axialschalthggse 27 has a locking lug 29 (see. Fig. 16 ), which with the switching cam 31 or the notches 32 of the rotating Axialschalt Sharings 9 (see. Fig. 15 ) is in contact.
  • the latching lug 29 (see. Fig. 16 ) slides along the switching cam 31 (cf. Fig.
  • FIG. 6 shows the position of the power selector valve plate 23 for the lowest power level
  • FIG. 7 the state in which the control knob 1 has been rotated via intermediate positions to the highest power level in the counterclockwise direction, whereby the locking lug 29 engages in the last notch 32 of the Axialschal Switzerlands 9.
  • the power preselector valve plate 23 now releases the maximum flow cross section.
  • the Figures 10 and 11 illustrate the adaptation of the main gas valve 4 to different manufacturing tolerances, performance variables, different network pressures and fuel gas types.
  • control knob 1 To adjust the control knob 1 is rotated in a defined level and then subtracted. By the tap of water, the device is started, while the burner pressure by measuring the pressure measuring nipple 39 (see. Fig. 1 ) is continuously measured.
  • the spring 16 acts in two ways (previous systems use for this purpose two springs): Once during the ignition, when the control knob 1 is pressed against the spring 16, and then upon release of the knob 1 so that the mechanism with shaft and button is reset , On the other hand, when opening and closing the power selector valve plate 23.
  • the adjustment is sensitive and infinitely variable.
  • the dynamic seal ( Fig. 3 ) between shaft 6 and housing is stressed axially only during the ignition process. Screwing movements do not occur.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Glass Compositions (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

Hydraulically controlled gas fitting for a gas-fired continuous water heater comprises a safety valve (2), an ignition gas valve (3), and a main gas valve (4) for adjusting the amplification factor that establishes the ratio of fuel volume flow to water volume flow. The main gas valve at least consists of one output preset valve head (23) and a valve seat. The combustion gas is guided from the safety valve to the ignition gas valve through the interior of the output preset valve head.

Description

Die Erfindung bezieht sich auf eine hydraulische geregelte Gasarmatur für einen brenngasbeheizten Durchlauf-Wasserheizer.The invention relates to a hydraulic regulated gas valve for a fuel gas heated continuous water heater.

Derartige Gasarmaturen zeichnen sich dadurch aus, dass sie in Abhängigkeit der zu erhitzenden Wassermenge und eines Stellknopfes die Brenngasmenge, die zu einem Brenner gelangt, anpassen. Mittels des Stellknopfes kann ein Verstärkungsfaktor (Brenngasvolumenstrom zu Wasservolumenstrom) eingestellt werden; das heißt, dass letztendlich die Wassertemperatur annähernd über den Knopf eingestellt wird. Derartige Armaturen sind z.B. aus EP 1 353 126 A und aus DE 4 316 779 A bekannt.Such gas fittings are characterized in that they adjust the amount of fuel gas that reaches a burner depending on the amount of water to be heated and a knob. By means of the adjusting knob, an amplification factor (fuel gas volume flow to water volume flow) can be set; that is, ultimately, the water temperature is set approximately by the knob. Such fittings are made, for example EP 1 353 126 A and from DE 4 316 779 A known.

Gemäß Normanforderungen müssen diese Gasarmaturen über mindestens zwei dichtende Ventile, die unterschiedliche Steuersignale haben, verfügen. Häufig wird als ein Steuersignal der lonisationsstrom in einer Flamme oder eine von der Flamme verursachte Thermospannung verwendet. Ist eine Flamme an der Brenneroberfläche vorhanden, so kann im Bereich der Flamme ein lonisationsstrom erfasst werden. Mit diesem lonisationsstrom kann mittels einer Spule ein Ventil, das Sicherheitsventil, geöffnet werden. Bei dem anderen dichtenden Ventil handelt es sich meist um das Wassermangelventil. Bei diesem Ventil wird in einem Wasserschalter eine dem Wasservolumenstrom äquivalente Hubbewegung erzeugt. Mittels dieser Hubbewegung lässt sich das Wassermangelventil öffnen und somit kann eine dem Wasservolumenstrom äquivalente Brenngasmenge durch die Gasarmatur strömen.According to standard requirements, these gas fittings must have at least two sealing valves which have different control signals. Often, the ionization current in a flame or a thermoelectric voltage caused by the flame is used as a control signal. If a flame is present on the burner surface, an ionization current can be detected in the area of the flame. With this ionization current, a valve, the safety valve, can be opened by means of a coil. The other sealing valve is usually the water shortage valve. In this valve, a stroke equivalent to the water volume flow is generated in a water switch. By means of this lifting movement, the water shortage valve can be opened and thus a fuel gas equivalent to the water volume flow can flow through the gas fitting.

Letztendlich verfügen häufig Gasarmaturen zusätzlich über ein Ventil, mit dem ein Verstärkungsfaktor zwischen Brenngasvolumenstrom und Wasservolumenstrom eingestellt werden kann. Diese Einstellung erfolgt in der Regel manuell vom Bediener, der häufig mittels Drehknopf und Umlenkung ein Kegelventil linear kontinuierlich öffnet beziehungsweise schließt. Hierdurch wird die Auslauftemperatur des Durchlauf-Wasserheizers verändert.Finally, gas valves often have a valve with which an amplification factor between the fuel gas volume flow and the water volume flow can be set. This adjustment is usually done manually by the operator, who often uses a rotary knob and diverter to continuously open or close a linear valve. As a result, the outlet temperature of the continuous water heater is changed.

Gasarmaturen für brenngasbeheizte Durchlauf-Wasserheizer sind in der Regel relativ aufwändig, da die verschiedenen Funktionen über eine Mechanik mit vielen Umlenkungen erreicht werden.Gas fittings for fuel gas heated continuous water heaters are usually relatively complex, since the various functions are achieved by a mechanism with many deflections.

Ziel der Erfindung ist, eine Gasarmatur für brenngasbeheizte Durchlauf-Wasserheizer zu schaffen, die sich durch einfachen und zuverlässigen Aufbau auszeichnet. Die Zündgasführung und Dichtung soll vereinfacht werden.The aim of the invention is to provide a gas valve for fuel gas heated continuous water heater, which is characterized by simple and reliable structure. The ignition gas guide and seal should be simplified.

Beim Stand der Technik wird das Zündgas zwischen dem Sicherheitsventilsitz (Magnetventil) und dem Ventilsitz zur Leistungsvorwahl (Hauptgasventil) durch eine abzweigende Bohrung seitlich abgenommen und um den Schaltmechanismus herum zum Zündgasventil geführt. Da sich der Antrieb für dieses Zündgasventil außerhalb des Gasführenden Bereiches befindet, ist eine separate dynamische Dichtung am Zündgasventilstößel notwendig.In the prior art, the ignition gas between the safety valve seat (solenoid valve) and the valve seat for power preselection (main gas valve) is removed laterally by a branching bore and guided around the switching mechanism to Zündgasventil. Since the drive for this pilot gas valve is outside the gas-conducting area, a separate dynamic seal on Zündgasventilstößel is necessary.

Beim bisherigen Stand der Technik wird bei der Werkseinstellung oder bei der Anpassung vor Ort eine zusätzliche Drossel genutzt, um den maximalen Gasdurchfluss zu beschneiden und somit die Nennleistung einzustellen. Ferner werden pro Gasart und Leistungsgröße verschiedene Leistungsvorwahlventile gefertigt und montiert. Bei einer Gasartenumstellung vor Ort muss dieses Ventil durch ein anderes ausgetauscht werden, wobei in einigen Fällen sogar die komplette Gasarmatur getauscht wird.In the prior art, an additional throttle is used in the factory setting or when adjusting locally to trim the maximum gas flow and thus adjust the rated power. Furthermore, different power preselector valves are manufactured and installed per gas type and capacity. In the case of a gas changeover on site, this valve must be replaced by another, in some cases even the complete gas fitting being replaced.

Gemäß den Merkmalen des Anspruchs 1 wird das Brenngas zum Zündgasventil durch das Innere des Hauptgasventils geführt. Da dieses gegenüber der Umgebung abgedichtet ist, hätten kleine Undichtigkeiten keinen Brenngasaustritt in die Umgebung zur Folge.According to the features of claim 1, the fuel gas is passed to the pilot gas valve through the interior of the main gas valve. Since this is sealed from the environment, small leaks would not result in fuel gas leakage into the environment.

Gemäß den Merkmalen des Anspruchs 2 wird das Zündgas durch die gleiche Führung wie der mechanische Betätigungsmechanismus des Sicherheitsventils geführt. Hierdurch werden vorhandene Bohrungen und Hohlräume doppelt genutzt.According to the features of claim 2, the ignition gas is passed through the same guide as the mechanical actuating mechanism of the safety valve. As a result, existing holes and cavities are used twice.

Ein weiterer Vorteil einer vorteilhaften Ausgestaltung der Erfindung ist gemäß Anspruch 5, dass die Gasarmatur bei der Werkseinstellung oder vor Ort ohne Einbau einer zusätzlichen Drossel durch ein bereits vorhandenes, von außen - zum Ausgleich von Fertigungstoleranzen und an verschiedene Leistungsgrößen, Netzdrücke und Gasarten - einstellbares Ventil angepasst werden kann. Durch den Entfall einer zusätzlichen Drossel wird der Druckverlust der Gasarmatur auf ein Minimum beschränkt. Des Weiteren kann neben der Nennleistung auch die Teillast eingestellt werden. Beim Herstellprozess wird nur noch ein universelles Leistungsvorwahlventil eingebaut, welches im Fall einer Gasartenumstellung beim Kunden nicht mehr ausgebaut und getauscht werden muss. Damit können Kosten eingespart werden und das Gerät ist durch die erhöhte Flexibilität für den Kunden deutlich attraktiver.Another advantage of an advantageous embodiment of the invention is according to claim 5, that the gas valve at the factory setting or on site without installation of an additional throttle by an existing, from the outside - to compensate for manufacturing tolerances and to different performance variables, network pressures and gas types - adjustable valve can be adjusted. The elimination of an additional throttle, the pressure drop of the gas valve is kept to a minimum. Furthermore, in addition to the nominal power and the partial load can be adjusted. In the manufacturing process, only a universal power preselector valve is installed, which in the case of a gas type change at the customer no longer needs to be removed and replaced. This can save costs and the device is much more attractive for the customer due to the increased flexibility.

Der Leistungsvorwahlventilkegel ist zusätzlich zur mehrstufigen Leistungsvorwahl an sich stufenlos und feinfühlig verschiebbar und somit einstellbar ist. Dies wird möglich, da sich ein Axialschaltstück auf einer Welle durch Drehen der Einstellschraube über eine Klammer verschieben lässt. Die Einstellschraube befindet sich koaxial zum Gasregelmechanismus direkt hinter dem Gasknopf, wodurch deren Wirken selbsterklärend ist.In addition to the multi-stage power preselection, the power preselector valve cone is infinitely and sensitively displaceable and thus adjustable. This is possible because a Axialschaltstück can move on a shaft by turning the adjusting screw via a clamp. The adjusting screw is located coaxially with the gas control mechanism directly behind the gas button, so that its action is self-explanatory.

Die Erfindung wird nun anhand der Zeichnungen erläutert. Hierbei zeigenThe invention will now be explained with reference to the drawings. Show here

Fig. 1 bis Fig. 16 die erfindungsgemäße Gasarmatur in verschiedenen Betriebssituationen sowie Details hiervon. Fig. 1 to Fig. 16 the gas valve according to the invention in various operating situations and details thereof.

Figur 1 zeigt die erfindungsgemäße Gasarmatur in der diagonalen Draufsicht mit dem Bedienknopf 1 an der Vorderseite, der seitlichen Aufnahmebohrung 43 für den Wasserschalter, dem rückseitigen Gaseingang 44, dem ebenfalls rückseitigem Thermomagneten 48, dem Gasausgang 45 zum Brenner, dem Messnippel 47 zum Messen des Eingangsdrucks, dem Messnippel 39 zum Messen des Brennerdrucks sowie dem Zündgasausgang 26. Die Figuren 2a und 2b zeigen die erfindungsgemäße Gasarmatur aus anderen Perspektiven ebenfalls in diagonaler Draufsicht. FIG. 1 shows the gas valve according to the invention in the diagonal plan view with the control knob 1 at the front, the side receiving bore 43 for the water switch, the rear gas inlet 44, the also rear thermomagnet 48, the gas outlet 45 to the burner, the measuring nipple 47 for measuring the inlet pressure, the Measuring nipple 39 for measuring the burner pressure and the ignition gas outlet 26. The FIGS. 2a and 2b show the gas valve according to the invention from other perspectives also in diagonal plan view.

Figur 3 zeigt die erfindungsgemäße Gasarmatur im Schnitt A - A gemäß Figur 1. Die Gasarmatur befindet sich im Ausgangszustand, in dem kein Brenngas strömt. Der Bedienknopf 1 befindet sich in der Ausgangsstellung. Das Sicherheitsventil 2 mit dem Thermomagneten 48, das Zündgasventil 3, das Hauptgasventil 4 zur Leistungsvorwahl, das einen Leistungsvorwahlventilteller 23 umfasst, und das Wassermangelventil 5, das nicht in Figur 3, sondern z.B. in Figur 8 zu sehen ist, sind geschlossen. Über den Gaseingang 44, der in Figur 3 nicht zu erkennen ist, liegt Brenngas links vor dem Sicherheitsventil 2 an. FIG. 3 shows the gas valve according to the invention in section A - A according to FIG. 1 , The gas valve is in the initial state, in which no fuel gas flows. The control knob 1 is in the starting position. The safety valve 2 with the thermomagnet 48, the Zündgasventil 3, the main gas valve 4 for power selection, which includes a Leistungsvorwahlventilteller 23, and the water shortage valve 5, not in FIG. 3 but in eg FIG. 8 can be seen, are closed. Via the gas inlet 44, which is in FIG. 3 can not be seen, fuel gas is on the left in front of the safety valve 2.

Gemäß Figur 4 wird durch Linksdrehung des Bedienknopfes 1 im Gegenuhrzeigersinn die Gasarmatur in die Zündstellung gebracht. Über die Welle 6 wird die Drehbewegung des Bedienknopfes 1 auf ein Radialschaltstück 10 übertragen. Durch die Einstellschraube 8 können axiale Bewegungen des Bedienknopfes 1 auf eine Zwischenwelle 51 und einen damit verbundenen Stift 7 übertragen werden. Das Radialschaltstück 10 verfügt über eine Steuerkurve 21 (vgl. Figur 14), wodurch der radiale Anstieg der Steuerkurve 21 bei einer Rotationsbewegung im Gegenuhrzeigersinn eine Anhebung des Zündgasventiltellers 11 gegen die Feder 12 bewirkt. Ein Zündgasfilter 13 wird etwas komprimiert. Eine Flachdichtung 14 hebt von einem Zündgasventilsitz 15 ab.According to FIG. 4 is brought by turning counterclockwise the control knob 1 counterclockwise, the gas valve in the ignition position. About the shaft 6, the rotational movement of the control knob 1 is transmitted to a radial contact piece 10. By the adjusting screw 8 can axial movements of the control knob 1 on an intermediate shaft 51 and a associated pin 7 are transmitted. The radial contact piece 10 has a control cam 21 (see. FIG. 14 ), whereby the radial increase of the control cam 21 causes a counterclockwise rotation of the Zündgasventiltellers 11 against the spring 12 in a rotational movement. A Zündgasfilter 13 is slightly compressed. A flat gasket 14 lifts off from a Zündgasventilsitz 15.

Aus Figur 5 geht hervor, dass im nächsten Bedienschritt der Bedienknopf 1 mit der Welle 6 gegen die Feder 16 gedrückt wird. Die Einstellschraube 8, die Klammer 17 (siehe auch Fig. 15), das Radialschaltstück 10, der Stift 7 und ein Axialschaltstück 9 werden dabei ebenfalls verschoben. Der Stift 7 trifft auf den Ventilteller 18 des Thermomagneten 48 und hebt gegen den Druck der Feder 49 die Flachdichtung 19 vom Ventilsitz 20 ab. Das Brenngas kann nun durch einen Spalt 22 zentrisch durch den Leistungsvorwahlventilteller 23 hindurch in die Kammer 24 strömen. Von dort findet das Brenngas durch den Spalt 25 den Weg über den Zündgasfilter 13 zum Zündgasausgang 26.Out FIG. 5 shows that in the next operating step, the control knob 1 is pressed with the shaft 6 against the spring 16. The adjusting screw 8, the bracket 17 (see also Fig. 15 ), the radial switch 10, the pin 7 and a Axialschaltstück 9 are also moved. The pin 7 strikes the valve plate 18 of the thermomagnet 48 and lifts against the pressure of the spring 49, the gasket 19 from the valve seat 20 from. The fuel gas can now flow through a gap 22 centrally through the power preselector valve plate 23 into the chamber 24. From there, the fuel gas through the gap 25, the path via the Zündgasfilter 13 to Zündgasausgang 26th

Der Zündgasbrenner kann nun gezündet werden. Nachdem das Zündgas am Zündgasbrenner entzündet wurde, kann nach einer kurzen Wartezeit aus der Flamme ein Thermostrom abgegriffen werden. Dieser Thermostrom wird auf den Thermomagneten 48 geleitet, wodurch der Thermomagnet 48 den Ventilteller 18 zum Thermomagneten 48 gegen die Feder 49 zieht. Der Bedienknopf 1 kann nun vom Bediener losgelassen werden. Dadurch gleiten die Teile Bedienknopf 1, Welle 6, Radialschaltstück 10, Einstellschraube 8, Klammer 17, Axialschaltstück 9 und Stift 7 aufgrund der Kraft der Feder 16 zurück in die Ausgangstellung. Das Zündgas fließt weiterhin.The ignition gas burner can now be ignited. After the ignition gas has been ignited at the pilot gas burner, a thermal current can be tapped from the flame after a short waiting time. This thermo-current is passed to the thermomagnet 48, whereby the thermomagnet 48 pulls the valve plate 18 to the thermomagnet 48 against the spring 49. The control knob 1 can now be released by the operator. As a result, slide the parts control knob 1, shaft 6, Radialschaltstück 10, adjusting screw 8, bracket 17, Axialschaltstück 9 and pin 7 due to the force of the spring 16 back to the starting position. The ignition gas continues to flow.

Zur Leistungsvorwahl wird gemäß Figur 6 - während das Zündgas weiterhin fließt - der Bedienknopf 1 im Gegenuhrzeigersinn in die erste Raste gedreht, was der niedrigsten Stufe der Leistungsvorwahl entspricht. Dieser Bewegung folgen die Teile Welle 6, Radialschaltstück 10, Einstellschraube 8, Stift 7, Klammer 17 und Axialschaltstücks 9.To the power preselection is according to FIG. 6 - While the ignition gas continues to flow - the control knob 1 is rotated counterclockwise in the first catch, which corresponds to the lowest level of the power selector. This movement is followed by the parts shaft 6, radial contact piece 10, adjusting screw 8, pin 7, clamp 17 and Axialschaltstücks. 9

Da Gleitschuhe 28 der Axialschalthülse 27 (vgl. Fig. 16) in in Längsrichtung verlaufende Nuten im Gehäuse 30 sitzen, ist nur eine axiale Bewegung der Axialschalthülse 27 möglich. Die Axialschalthülse 27 verfügt über eine Rastnase 29 (vgl. Fig. 16), welche mit der Schaltkurve 31 oder den Kerben 32 des rotierenden Axialschaltstücks 9 (vgl. Fig. 15) in Berührung ist. Somit führt die Rotationsbewegung des Bedienknopfes 1 zu einer axialen Bewegung des Axialschaltstücks 27 gegen die Feder 16. Die Rastnase 29 (vgl. Fig. 16) gleitet entlang der Schaltkurve 31 (vgl. Fig. 15) bis sie in die erste Kerbe 32 (Fig. 15) einrastet. Dieser Bewegung folgt auch der Leistungsvorwahlventilteller 23 und die Flachdichtung 33, welche vom Ventilsitz 34 abhebt. Dadurch wird - definiert durch den Spalt 35 - einer bestimmten Brenngasmenge der Durchfluss durch einen Zwischenraum 50 bis zum Wassermangelventil 5 (vgl. Fig. 8) gewährt.Since sliding blocks 28 of the Axialschalthülse 27 (see. Fig. 16 ) sitting in longitudinally extending grooves in the housing 30, only axial movement of the Axialschalthülse 27 is possible. The Axialschalthülse 27 has a locking lug 29 (see. Fig. 16 ), which with the switching cam 31 or the notches 32 of the rotating Axialschaltstücks 9 (see. Fig. 15 ) is in contact. Thus, the rotational movement of the control knob 1 leads to an axial movement of the Axialschaltstücks 27 against the spring 16. The latching lug 29 (see. Fig. 16 ) slides along the switching cam 31 (cf. Fig. 15 ) until it is in the first notch 32 ( Fig. 15 ) engages. This movement is also followed by the power preselector valve plate 23 and the flat seal 33, which lifts off from the valve seat 34. Thereby - defined by the gap 35 - a certain amount of fuel gas, the flow through a gap 50 to the water shortage valve 5 (see. Fig. 8 ).

Während Figur 6 die Stellung des Leistungsvorwahlventiltellers 23 für die niedrigste Leistungsstufe zeigt, zeigt Figur 7 den Zustand, bei dem der Bedienknopf 1 über Zwischenstellungen bis zur höchsten Leistungsstufe im Gegenuhrzeigersinn gedreht wurde, wodurch die Rastnase 29 in die letzte Kerbe 32 des Axialschalstücks 9 eingreift. Der Leistungsvorwahlventilteller 23 gibt nun den maximalen Strömungsquerschnitt frei.While FIG. 6 shows the position of the power selector valve plate 23 for the lowest power level shows FIG. 7 the state in which the control knob 1 has been rotated via intermediate positions to the highest power level in the counterclockwise direction, whereby the locking lug 29 engages in the last notch 32 of the Axialschalstücks 9. The power preselector valve plate 23 now releases the maximum flow cross section.

Wird in dieser sogenannten Bereitschaftsstellung Wasser gezapft, wird einen bekannten hydraulischen Vorgang im Wasserschalter die Membrane bewegt und über den Stift 36 (vgl. Fig. 8) und Einstellschraube 37 (Fig. 8) das Wassermangelventil 5 (Fig. 8) gegen die Feder 38 (Fig. 8) entsprechend der Wasserdurchflussmenge geöffnet. Die Einstellschraube 37 (Fig. 8) kann nur bei geöffnetem Gehäuse und somit nur außer Betrieb betätigt werden. Der Hauptbrenngasstrom strömt gemäß Figur 9 durch das geöffnete Wassermangelventil 5 vom Zwischenraum 50 durch den Gasausgang 45 am Gehäuse zum Brenner, wo das Gas - Luft - Gemisch von der brennenden Zündflamme entzündet wird.If water is tapped in this so-called ready position, a known hydraulic process in the water switch, the membrane is moved and via the pin 36 (see. Fig. 8 ) and adjusting screw 37 ( Fig. 8 ) the water shortage valve 5 ( Fig. 8 ) against the spring 38 ( Fig. 8 ) according to the water flow rate. The adjusting screw 37 ( Fig. 8 ) can only be operated with the housing open and thus only out of operation. The main combustion gas flow flows according to FIG. 9 through the open water deficiency valve 5 from the gap 50 through the gas outlet 45 on the housing to the burner, where the gas - air mixture is ignited by the burning pilot flame.

Die Figuren 10 und 11 veranschaulichen die Anpassung des Hauptgasventils 4 an unterschiedliche Fertigungstoleranzen, Leistungsgrößen, unterschiedliche Netzdrücken und Brenngasarten.The Figures 10 and 11 illustrate the adaptation of the main gas valve 4 to different manufacturing tolerances, performance variables, different network pressures and fuel gas types.

Zur Anpassung wird der Bedienknopf 1 wird in eine definierte Stufe gedreht und anschließend abgezogen. Durch das Zapfen von Wasser wird das Gerät gestartet, während der Brennerdruck durch Messen am Druckmessnippel 39 (vgl. Fig. 1) fortlaufend gemessen wird.To adjust the control knob 1 is rotated in a defined level and then subtracted. By the tap of water, the device is started, while the burner pressure by measuring the pressure measuring nipple 39 (see. Fig. 1 ) is continuously measured.

Durch Drehen der Einstellschraube 8 verändert sich deren axiale Position in der Zwischenwelle 51 und über den umlaufenden Einstich 40 folgen auch die U-förmige Klammer 17, die Teile Axialschaltstück 9, Feder 16, Axialschalthülse 27 und schließlich auch der Leistungsvorwahlventilteller 23. Dadurch verändert sich der Ventilspalt 35 solange, bis der gewünschte Brennerdruck erreicht wird.By turning the adjusting screw 8 changes their axial position in the intermediate shaft 51 and the circumferential groove 40 is followed by the U-shaped bracket 17, the parts Axialschaltstück 9, spring 16, Axialschalthülse 27 and finally the power selector valve plate 23. This changes the Valve gap 35 until the desired burner pressure is reached.

Weitere Merkmale sind, dass beim Einstellvorgang durch die Einstellschraube 8 die axiale Position des Bedienknopfs 1 sich nicht ändert. Die Stellung der Einstellschraube 8 muss aufgrund der Selbsthemmung nicht gegen selbstständiges Lösen gesichert werden. Die Feder 16 wirkt in zweifacher Hinsicht (bisherige Systeme nutzen zu diesem Zweck zwei Federn): Einmal während des Zündvorgangs, wenn der Bedienknopf 1 gegen die Feder 16 gedrückt wird, und anschließend beim Loslassen des Knopfes 1 damit der Mechanismus mit Welle und Knopf zurückgestellt wird. Zum anderen beim Öffnen und Schließen des Leistungsvorwahlventiltellers 23. Die Einstellung erfolgt feinfühlig und stufenlos. Die dynamische Dichtung (Fig. 3) zwischen Welle 6 und Gehäuse wird nur beim Zündvorgang axial beansprucht. Schraubende Bewegungen treten nicht auf.Other features are that during the adjustment process by the adjusting screw 8, the axial position of the control knob 1 does not change. The position of the adjusting screw 8 must not be secured against self-loosening due to the self-locking. The spring 16 acts in two ways (previous systems use for this purpose two springs): Once during the ignition, when the control knob 1 is pressed against the spring 16, and then upon release of the knob 1 so that the mechanism with shaft and button is reset , On the other hand, when opening and closing the power selector valve plate 23. The adjustment is sensitive and infinitely variable. The dynamic seal ( Fig. 3 ) between shaft 6 and housing is stressed axially only during the ignition process. Screwing movements do not occur.

Neben der im folgenden Text beschriebenen Gasarmatur mit Zündflamme und manueller Zündung gibt es auch noch die so genannte elektronische Gasarmatur mit elektrischer Zündung. Dabei existiert keine Zündflamme, das Hauptgas wird elektronisch direkt beim Zapfen des Wassers gezündet (Direktstarter). Die Flammenerkennung (-sicherung) erfolgt durch eine Ionisationselektrode. Der Thermoelektromagnet wird durch ein elektrisches Motorventil ersetzt welches durch Spannungsversorgung von Batterie oder Generator selbstständig öffnet und schließt. Das eingangs erwähnte ,Von außen einstellbare Leistungsvorwahlventil' wird auch bei dieser Variante mit denselben Vorzügen angewandt.In addition to the gas fitting described below with pilot flame and manual ignition, there is also the so-called electronic gas fitting with electric Ignition. There is no pilot flame, the main gas is ignited electronically directly when tapping the water (direct starter). The flame detection (assurance) is carried out by an ionization electrode. The thermo-electromagnet is replaced by an electric motor valve which automatically opens and closes by supplying power to the battery or generator. The above-mentioned, externally adjustable power selector valve 'is also used in this variant with the same benefits.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Bedienknopfcontrol knob
22
Sicherheitsventilsafety valve
33
ZündgasventilPilot gas valve
44
HauptgasventilMain gas valve
55
WassermangelventilLow water valve
66
Wellewave
77
Stiftpen
88th
Einstellschraubeadjustment
99
AxialschaltstückAxialschaltstück
1010
RadialschaltstückRadial contact member
1111
ZündgasventiltellerZündgasventilteller
1212
Federfeather
1313
Zündgasfilterpilot filters
1414
Flachdichtunggasket
1515
ZündgasventilsitzZündgasventilsitz
1616
Federfeather
1717
Klammerclip
1818
Ventiltellervalve disc
1919
Flachdichtunggasket
2020
Ventilsitzvalve seat
2222
Spaltgap
2323
LeistungsvorwahlventiltellerPerformance preset valve disc
2424
Kammerchamber
2525
Spaltgap
2626
Zündgasausgangignition gas output
2727
AxialschalthülseAxialschalthülse
2828
Gleitschuhshoe
2929
Rastnaselocking lug
3131
Schaltkurveswitching curve
3232
Kerbescore
3333
Flachdichtunggasket
3434
Ventilsitzvalve seat
3535
Spaltgap
3636
Stiftpen
3737
Einstellschraubeadjustment
3838
Federfeather
3939
Messnippel zum Messen des BrennerdrucksMeasuring nipple for measuring the burner pressure
4343
Aufnahmebohrung für WasserschalterMounting hole for water switch
4444
Gaseinganggas input
4545
Gasausgang zum BrennerGas outlet to the burner
4747
Messnippel für EingangdruckMeasuring nipple for inlet pressure
4848
Thermomagnetmagnetothermal
4949
Federfeather
5050
Zwischenraumgap
5151
Zwischenwelleintermediate shaft

Claims (5)

  1. A hydraulically controlled gas valve for a gas fired instant flow water heater comprising a safety valve (2) an ignition gas valve (3), a main gas valve (4) for setting the amplification factor governing the ratio between the fuel gas volume and the water volume rate of flow, characterised in that the main gas valve (4) is at least composed of a power selection valve head (23) and a valve seat (34) and that the flow of fuel gas is directed from the safety valve (2) to the ignition gas valve (3) through the interior of the power selection valve head (23).
  2. A hydraulically controlled gas valve as claimed in Claim 1 characterised in that a mechanical operating device for opening the safety valve (2) for starting an ignition burner is likewise directed through the interior of the power selection valve head (23).
  3. A hydraulically controlled gas valve as claimed in Claim 1, characterised in that the ignition gas valve (3) is opened and closed by the rotary movement of a radial control member (10) having a radial cam (21) which, depending of the rotary position, pushes or does not push an ignition gas valve head (11) out of an ignition gas valve seat (15).
  4. A hydraulically controlled gas valve as claimed in any of Claims 1 to 3, characterised in that the mechanical operation of the safety valve (2), the ignition gas valve (3) and the main gas valve (4) is initiated by a rotary movement of a control knob (1).
  5. A hydraulically controlled gas valve as claimed in any of Claims 1 to 3, characterised in that the ignition gas valve head (11) is directly or indirectly adjustable in an axial direction by means of an adjusting screw (8)
EP04024721A 2003-10-31 2004-10-16 Gas valve Not-in-force EP1528320B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL04024721T PL1528320T3 (en) 2003-10-31 2004-10-16 Gas valve
SI200431642T SI1528320T1 (en) 2003-10-31 2004-10-16 Gas valve

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10351723 2003-10-31
DE10351723 2003-10-31

Publications (2)

Publication Number Publication Date
EP1528320A1 EP1528320A1 (en) 2005-05-04
EP1528320B1 true EP1528320B1 (en) 2011-03-02

Family

ID=34399683

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04024721A Not-in-force EP1528320B1 (en) 2003-10-31 2004-10-16 Gas valve

Country Status (9)

Country Link
EP (1) EP1528320B1 (en)
AT (1) ATE500470T1 (en)
DE (1) DE502004012249D1 (en)
DK (1) DK1528320T3 (en)
ES (1) ES2359701T3 (en)
HK (1) HK1074665A1 (en)
PL (1) PL1528320T3 (en)
PT (1) PT1528320E (en)
SI (1) SI1528320T1 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4316779A1 (en) * 1992-06-24 1994-11-24 Mertik Maxitrol Gmbh & Co Kg Gas quantity control, especially for a tap of a once-through water heater
DE10315543A1 (en) * 2002-04-11 2003-10-30 Vaillant Gmbh Hydraulically controlled gas valve

Also Published As

Publication number Publication date
EP1528320A1 (en) 2005-05-04
PT1528320E (en) 2011-04-18
ES2359701T3 (en) 2011-05-26
SI1528320T1 (en) 2011-05-31
DE502004012249D1 (en) 2011-04-14
ATE500470T1 (en) 2011-03-15
HK1074665A1 (en) 2005-11-18
PL1528320T3 (en) 2011-07-29
DK1528320T3 (en) 2011-06-14

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