EP1837593B1 - Gas fitting - Google Patents

Gas fitting Download PDF

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Publication number
EP1837593B1
EP1837593B1 EP07005424.2A EP07005424A EP1837593B1 EP 1837593 B1 EP1837593 B1 EP 1837593B1 EP 07005424 A EP07005424 A EP 07005424A EP 1837593 B1 EP1837593 B1 EP 1837593B1
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EP
European Patent Office
Prior art keywords
gas
exit
gas valve
holder
throttle
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.)
Active
Application number
EP07005424.2A
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German (de)
French (fr)
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EP1837593A3 (en
EP1837593A2 (en
Inventor
Udo Halbach
Wolfgang Rohde
Thomas Schmidbauer
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.)
Vaillant GmbH
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Vaillant GmbH
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Publication date
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Publication of EP1837593A2 publication Critical patent/EP1837593A2/en
Publication of EP1837593A3 publication Critical patent/EP1837593A3/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/20—Calibrating devices
    • 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
    • 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
    • F23N2235/24—Valve details

Definitions

  • the invention relates to a gas valve with a throttle device for flow limitation.
  • the fuel gas amount is adjusted via a gas fitting.
  • the gas fitting has at least one safety valve for closing the gas path as well as a proportional valve with which the gas quantity can be adjusted as needed.
  • the amount of fuel gas flowing through a gas fitting is dependent on the connection pressure of the fuel gas, the cross section of the flow path, and other factors that influence the flow resistance.
  • gas valves are offered in certain performance sizes and limited by nozzles to a specific flow rate. According to EN 483, with fully open valves of a gas fitting and standard connection pressure, the fuel gas quantity must correspond to the target fuel gas quantity +/- 5%.
  • Gas fittings have according to the prior art threaded connections at the input and output.
  • the nozzles for limiting the fuel gas volume flow are positioned with the interposition of a respective seal between the threaded connection and the connecting pipe connected thereto and fastened by means of a union nut.
  • the pressure which is made available to the burner the so-called burner pressure
  • the gas connection pressure, as well as the burner pressure can be checked. Therefore, gas fittings usually have measuring points at the input and output.
  • the pressure upstream of the throttle which is higher than the burner pressure, is measured at the measuring point at the outlet of the gas fitting. For this reason, it is necessary that there is another measuring point in the connecting tube to the burner for measuring the burner pressure.
  • a gas fitting with variable gas nozzle is known, in which there is a measuring point in front of and behind this variable gas nozzle.
  • the pressure difference which prevails between the two measuring points, measured and used to adjust the diameter of the variable gas nozzle.
  • the invention has for its object to reduce the number of gas pressure measuring points and on the other hand to avoid incorrect measurement.
  • an advantageous design of a throttle device according to the invention is protected with a holder.
  • the holder of the throttle device generates a greater pressure loss than the nozzle itself and thus the pressure would be further reduced.
  • the holder of the throttle device has a removal pin, with which the device can be conveniently removed or used.
  • the mounting of the throttle device is flow-optimized.
  • the throttle device can be used instead of on the output side of the gas valve on the input side of the gas valve.
  • FIG. 1 shows a gas fitting 1 with a first measuring point 3 at the entrance 4.
  • a continuous valve 17 In the central region of the gas fitting 1 is a continuous valve 17 and a safety valve 18.
  • a second measuring point 6 In the region of the output 7 is a second measuring point 6.
  • the output 7 has a cylindrical cross-section.
  • the throttle device 2 On a constriction 12, the throttle device 2 is located with nozzle 19, 10 and connection holder 11.
  • the holder 11 closes immediately a seal 13, which separates the gas fitting 1 from a connecting pipe 14.
  • Gas fitting 1 and connecting pipe 14 are connected by means of a union nut 16.
  • the throttle device 2 has a nozzle 19 with nozzle bore 5, a connection 10 in the form of two connecting struts and a holder 11 in the form of a crossbar, which has the width of the diameter of the output 7. Further, a sampling nozzle 15 is attached to the holder 11.
  • the throttle device 2 is inserted into the outlet 7 of the gas fitting 1, so that the throttle device 2 rests on the constriction 12. Then, a seal 13 is placed on the threaded connection 9 at the output 7. Then a connection pipe 14 is laid, which is then tightly connected by means of a union nut 16 with the gas fitting.
  • the throttle device 2 can not be erroneously used at the entrance 4.
  • the first measuring point 3 is connected to a pressure gauge.
  • the second measuring point 6 is connected to a measuring device.
  • the union nut 16 is first removed from threaded connection 9 of the gas fitting 1. Then the connecting pipe 14 and the seal 13 are removed. The throttle device 2 can be removed and replaced by another with another nozzle bore 5.

Description

Die Erfindung bezieht sich auf eine Gasarmatur mit einer Drosselvorrichtung zur Durchflussbegrenzung.The invention relates to a gas valve with a throttle device for flow limitation.

Bei Heizgeräten für gasförmige Brennstoffe wird die Brenngasmenge über eine Gasarmatur eingestellt. Die Gasarmatur verfügt über mindestens ein Sicherheitsventil zum Verschließen des Gasweges sowie ein Proportionalventil, mit dem bedarfsgerecht die Gasmenge eingestellt wird. Die Brenngasmenge, welche durch eine Gasarmatur strömt, ist von dem Anschlussdruck des Brenngases, dem Querschnitt des Strömungswegs sowie anderen Faktoren, welche den Strömungswiderstand beeinflussen, abhängig. Zur Begrenzung der Variantenvielfalt werden Gasarmaturen in bestimmten Leistungsgrößen angeboten und mittels Düsen auf eine konkrete Durchflussmenge begrenzt. Die EN 483 schreibt vor, dass bei voll geöffneten Ventilen einer Gasarmatur und Normanschlussdruck die Brenngasmenge der Soll-Brenngasmenge +/- 5% entsprechen muss.In gaseous fuel heaters, the fuel gas amount is adjusted via a gas fitting. The gas fitting has at least one safety valve for closing the gas path as well as a proportional valve with which the gas quantity can be adjusted as needed. The amount of fuel gas flowing through a gas fitting is dependent on the connection pressure of the fuel gas, the cross section of the flow path, and other factors that influence the flow resistance. To limit the variety of variants gas valves are offered in certain performance sizes and limited by nozzles to a specific flow rate. According to EN 483, with fully open valves of a gas fitting and standard connection pressure, the fuel gas quantity must correspond to the target fuel gas quantity +/- 5%.

Gasarmaturen verfügen gemäß dem Stand der Technik über Gewindeanschlüsse am Ein- und Ausgang. Die Düsen zur Begrenzung des Brenngasvolumenstromes werden unter Zwischenlage jeweils einer Dichtung zwischen dem Gewindeanschluss und dem daran angeschlossenen Anschlussrohr positioniert und mittels einer Überwurfmutter befestigt. Dementsprechend stellt sich der Druck, welcher dem Brenner zur Verfügung gestellt wird, der so genannte Brennerdruck, erst außerhalb der Gasarmatur im Anschlussrohr ein. Zur Überprüfung der Funktionsfähigkeit des Heizgerätes inklusive der Gasarmatur ist es notwendig, dass der Gasanschlussdruck, als auch der Brennerdruck überprüft werden kann. Daher verfügen Gasarmaturen meist über Messstellen am Ein- und Ausgang. Wie jedoch bereits oben beschrieben, wird an der Messstelle am Ausgang der Gasarmatur der Druck vor der Drossel gemessen, welcher höher als der Brennerdruck ist. Aus diesem Grund ist es notwendig, dass im Anschlussrohr zum Brenner eine weitere Messstelle zur Messung des Brennerdrucks vorhanden ist.Gas fittings have according to the prior art threaded connections at the input and output. The nozzles for limiting the fuel gas volume flow are positioned with the interposition of a respective seal between the threaded connection and the connecting pipe connected thereto and fastened by means of a union nut. Accordingly, the pressure which is made available to the burner, the so-called burner pressure, only arises outside of the gas fitting in the connecting pipe. to Checking the functionality of the heater including the gas fitting, it is necessary that the gas connection pressure, as well as the burner pressure can be checked. Therefore, gas fittings usually have measuring points at the input and output. However, as already described above, the pressure upstream of the throttle, which is higher than the burner pressure, is measured at the measuring point at the outlet of the gas fitting. For this reason, it is necessary that there is another measuring point in the connecting tube to the burner for measuring the burner pressure.

Aus der AT 406 903 B ist eine Gasarmatur mit variabler Gasdüse bekannt, bei welcher sich vor und hinter dieser variablen Gasdüse jeweils eine Messstelle befinden. Zur Kalibrierung der Gasarmatur auf ein bestimmtes Brenngas, was mittels der variablen Gasdüse geschieht, wird die Druckdifferenz, welche zwischen den beiden Messstellen herrscht, gemessen und zur Einstellung des Durchmessers der variablen Gasdüse verwendet. Eine derartige Gasarmatur ermöglicht zwar eine sehr individuelle Einstellung, ist jedoch relativ aufwändig, da für die variable Gasdüse ein elektrisches Stellglied benötigt wird. Zudem ist ein elektrisches Stellglied verschleißanfällig und kann ausfallen.From the AT 406 903 B a gas fitting with variable gas nozzle is known, in which there is a measuring point in front of and behind this variable gas nozzle. To calibrate the gas fitting to a specific fuel gas, which is done by means of the variable gas nozzle, the pressure difference, which prevails between the two measuring points, measured and used to adjust the diameter of the variable gas nozzle. Although such a gas fitting allows a very individual setting, but is relatively expensive, since the variable gas nozzle, an electric actuator is needed. In addition, an electric actuator is susceptible to wear and can fail.

Der Erfindung liegt die Aufgabe zugrunde, die Anzahl der Gasdruckmessstellen zu vermindern und andererseits eine Fehlmessung zu vermeiden.The invention has for its object to reduce the number of gas pressure measuring points and on the other hand to avoid incorrect measurement.

Erfindungsgemäß wird dies gemäß den Merkmalen des unabhängigen Anspruchs 1 dadurch erreicht, dass die Düse als Teil einer Drosselvorrichtung in der Gasarmatur vor der Messstelle positioniert wird. Hierdurch ist es möglich, an der Messstelle des Gasarmaturenausgangs den Brennerdruck zu messen. Es kann daher auch darauf verzichtet werden, die Messstelle am Ausgang der Gasarmatur zu verplomben oder zu versiegeln, um Fehlmessungen zu vermeiden.According to the invention this is achieved according to the features of independent claim 1, characterized in that the nozzle is positioned as part of a throttle device in the gas fitting in front of the measuring point. This makes it possible to measure the burner pressure at the measuring point of the gas fittings outlet. Therefore, it is also possible to dispense with sealing or sealing the measuring point at the outlet of the gas fitting in order to avoid incorrect measurements.

Gemäß den Merkmalen des abhängigen Anspruchs 2 ist eine vorteilhafte Bauform einer erfindungsgemäßen Drosselvorrichtung mit Halterung geschützt. Gemäß den Merkmalen des abhängigen Anspruchs 3 wird vermieden, dass die Halterung der Drosselvorrichtung einen größeren Druckverlust erzeugt als die Düse selbst und somit der Druck nochmals reduziert würde. Gemäß den Merkmalen des abhängigen Anspruchs 4 verfügt die Halterung der Drosselvorrichtung über einen Entnahmezapfen, mit dem die Vorrichtung bequem entnommen oder eingesetzt werden kann. Gemäß den Merkmalen des anhängigen Anspruchs 5 ist die Halterung der Drosselvorrichtung strömungsoptimiert. Gemäß den Merkmalen des abhängigen Anspruchs 6 wird vermieden, dass die Drosselvorrichtung statt auf der Ausgangsseite der Gasarmatur auf der Eingangsseite der Gasarmatur eingesetzt werden kann.According to the features of the dependent claim 2, an advantageous design of a throttle device according to the invention is protected with a holder. According to the features of dependent claim 3 it is avoided that the holder of the throttle device generates a greater pressure loss than the nozzle itself and thus the pressure would be further reduced. According to the features of the dependent claim 4, the holder of the throttle device has a removal pin, with which the device can be conveniently removed or used. According to the features of appended claim 5, the mounting of the throttle device is flow-optimized. According to the features of the dependent claim 6 it is avoided that the throttle device can be used instead of on the output side of the gas valve on the input side of the gas valve.

Die Erfindung wird nun anhand der Figuren detailliert erläutert. Hierbei zeigen

  • Figur 1 eine erfindungsgemäße Gasarmatur mit Drosselvorrichtung im Schnitt,
  • Figur 2 dieselbe Vorrichtung von der Seite,
  • Figur 3 die Drosselvorrichtung detailliert im Ausgangsbereich der Gasarmatur sowie
  • Figur 4 eine perspektivische Ansicht der Drosselvorrichtung.
The invention will now be explained in detail with reference to FIGS. Show here
  • FIG. 1 a gas fitting according to the invention with throttle device in section,
  • FIG. 2 the same device from the side,
  • FIG. 3 the throttle device detailed in the output area of the gas valve as well
  • FIG. 4 a perspective view of the throttle device.

Figur 1 zeigt eine Gasarmatur 1 mit einer ersten Messstelle 3 am Eingang 4. Im mittleren Bereich der Gasarmatur 1 befinden sich ein Stetigventil 17 sowie ein Sicherheitsventil 18. Im Bereich des Ausgangs 7 befindet sich eine zweite Messstelle 6. Der Ausgang 7 weist einen zylindrischen Querschnitt auf. Auf einer Verengung 12 liegt die Drosselvorrichtung 2 mit Düse 19, Verbindung 10 und Halterung 11 auf. Der Halterung 11 schließt sich unmittelbar eine Dichtung 13 an, welche die Gasarmatur 1 von einem Anschlussrohr 14 trennt. Gasarmatur 1 und Anschlussrohr 14 sind mittels einer Überwurfmutter 16 verbunden. Die Drosselvorrichtung 2 verfügt über eine Düse 19 mit Düsenbohrung 5, eine Verbindung 10 in Form von zwei Verbindungsstreben sowie eine Halterung 11 in Form eines Querbalkens, welcher die Breite des Durchmessers des Ausgangs 7 aufweist. Ferner ist an der Halterung 11 ein Entnahmestutzen 15 angebracht. FIG. 1 shows a gas fitting 1 with a first measuring point 3 at the entrance 4. In the central region of the gas fitting 1 is a continuous valve 17 and a safety valve 18. In the region of the output 7 is a second measuring point 6. The output 7 has a cylindrical cross-section. On a constriction 12, the throttle device 2 is located with nozzle 19, 10 and connection holder 11. The holder 11 closes immediately a seal 13, which separates the gas fitting 1 from a connecting pipe 14. Gas fitting 1 and connecting pipe 14 are connected by means of a union nut 16. The throttle device 2 has a nozzle 19 with nozzle bore 5, a connection 10 in the form of two connecting struts and a holder 11 in the form of a crossbar, which has the width of the diameter of the output 7. Further, a sampling nozzle 15 is attached to the holder 11.

Zur Montage wird die Drosselvorrichtung 2 in den Ausgang 7 der Gasarmatur 1 eingesetzt, so dass die Drosselvorrichtung 2 auf der Verengung 12 aufliegt. Dann wird eine Dichtung 13 auf den Gewindeanschluss 9 am Ausgang 7 gelegt. Hierauf wird ein Anschlussrohr 14 gelegt, welches anschließend mittels einer Überwurfmutter 16 mit der Gasarmatur dicht verbunden wird.For assembly, the throttle device 2 is inserted into the outlet 7 of the gas fitting 1, so that the throttle device 2 rests on the constriction 12. Then, a seal 13 is placed on the threaded connection 9 at the output 7. Then a connection pipe 14 is laid, which is then tightly connected by means of a union nut 16 with the gas fitting.

Da der Durchmesser der Düse 19 größer als der Querschnitt des Eingangs 4 der Gasarmatur 1 ist, kann die Drosselvorrichtung 2 nicht fälschlicherweise am Eingang 4 eingesetzt werden.Since the diameter of the nozzle 19 is greater than the cross section of the input 4 of the gas fitting 1, the throttle device 2 can not be erroneously used at the entrance 4.

Zur Messung des Gasanschlussdrucks wird die erste Messstelle 3 mit einem Druckmessgerät verbunden. Zur Messung des Brennerdrucks wird die zweite Messstelle 6 mit einem Messgerät verbunden.For measuring the gas connection pressure, the first measuring point 3 is connected to a pressure gauge. For measuring the burner pressure, the second measuring point 6 is connected to a measuring device.

Soll der maximale Brenngasvolumenstrom verändert werden, so wird zunächst die Überwurfmutter 16 von Gewindeanschluss 9 der Gasarmatur 1 entfernt. Sodann werden das Anschlussrohr 14 und die Dichtung 13 entfernt. Die Drosselvorrichtung 2 kann entnommen werden und durch eine andere mit anderer Düsenbohrung 5 ersetzt werden.If the maximum fuel gas volume flow to be changed, the union nut 16 is first removed from threaded connection 9 of the gas fitting 1. Then the connecting pipe 14 and the seal 13 are removed. The throttle device 2 can be removed and replaced by another with another nozzle bore 5.

Claims (6)

  1. Gas valve (1) having a throttling device (2) for flow restriction, a first measuring point (3) at the entrance (4) of the gas valve (1) and a second measuring point (6) at the exit (7) of the gas valve (1), wherein both the entrance (4) and the exit (7) of the gas valve (1) have threaded connections (8, 9), characterised in that the throttling device (2) is positioned in the gas path in the exit (7) upstream of the second measuring point (6), has a nozzle (19) and a connection (10) to a holder (11) which is attached to the threaded connection (9) of the exit (7).
  2. Gas valve (1) having a throttle (2) according to claim 1, characterised in that the throttling device (2) lies on a narrowing (12) in the exit and the holder (11) is in contact with a seal (13) or a connection pipe (14) in the threaded connection (9) of the exit (7).
  3. Gas valve (1) having a throttle (2) according to claim 1 or 2, characterised in that the holder (11) covers part of the cross section of the exit (7), wherein the free cross section of the exit (7) is preferably larger than the free cross section of the nozzle (19) at the height of the holder (11).
  4. Gas valve (1) having a throttle (2) according to one of claims 1 to 3, characterised in that a removal pin (15) connected thereto is arranged downstream of the holder (11).
  5. Gas valve (1) having a throttle (2) according to one of claims 1 to 4, characterised in that the holder (11) on the side facing the entrance (4) has a contour with low flow resistance.
  6. Gas valve (1) having a throttle (2) according to one of claims 1 to 5, characterised in that the cross section of the entrance (4) is smaller than the cross section of the exit (7).
EP07005424.2A 2006-03-22 2007-03-16 Gas fitting Active EP1837593B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0048506A AT502406B1 (en) 2006-03-22 2006-03-22 Gas armature has throttle device for flow limiter, has throttle device positioned in outlet upstream measuring point in gas passage and over nozzle and over connection regulates with mounting fastened to threaded connection of outlet

Publications (3)

Publication Number Publication Date
EP1837593A2 EP1837593A2 (en) 2007-09-26
EP1837593A3 EP1837593A3 (en) 2008-05-21
EP1837593B1 true EP1837593B1 (en) 2015-06-17

Family

ID=37776728

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07005424.2A Active EP1837593B1 (en) 2006-03-22 2007-03-16 Gas fitting

Country Status (4)

Country Link
EP (1) EP1837593B1 (en)
AT (1) AT502406B1 (en)
DE (1) DE102007012731A1 (en)
ES (1) ES2547069T3 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6018887B2 (en) * 1978-04-17 1985-05-13 松下電器産業株式会社 Combustion control device
US4850530A (en) * 1987-12-15 1989-07-25 Johnson Service Company Gas valve using modular construction
DE19639992B4 (en) * 1995-09-23 2007-09-13 Vaillant Gmbh Method for controlling the gas flow rate
CZ305381B6 (en) * 2002-01-29 2015-08-26 Sit S.P.A. Valve unit for modulating gas delivery pressure

Also Published As

Publication number Publication date
AT502406A4 (en) 2007-03-15
EP1837593A3 (en) 2008-05-21
ES2547069T3 (en) 2015-10-01
DE102007012731A1 (en) 2007-09-27
AT502406B1 (en) 2007-03-15
EP1837593A2 (en) 2007-09-26

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