EP0282758B1 - Valve arrangement - Google Patents

Valve arrangement Download PDF

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Publication number
EP0282758B1
EP0282758B1 EP88102493A EP88102493A EP0282758B1 EP 0282758 B1 EP0282758 B1 EP 0282758B1 EP 88102493 A EP88102493 A EP 88102493A EP 88102493 A EP88102493 A EP 88102493A EP 0282758 B1 EP0282758 B1 EP 0282758B1
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EP
European Patent Office
Prior art keywords
pipe
fuel
valve arrangement
arrangement according
line
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 - Lifetime
Application number
EP88102493A
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German (de)
French (fr)
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EP0282758A2 (en
EP0282758A3 (en
Inventor
Alfred Sinner
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.)
Karl Dungs GmbH and Co KG
Original Assignee
Karl Dungs GmbH and Co KG
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.)
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Publication date
Application filed by Karl Dungs GmbH and Co KG filed Critical Karl Dungs GmbH and Co KG
Priority to AT88102493T priority Critical patent/ATE68580T1/en
Publication of EP0282758A2 publication Critical patent/EP0282758A2/en
Publication of EP0282758A3 publication Critical patent/EP0282758A3/en
Application granted granted Critical
Publication of EP0282758B1 publication Critical patent/EP0282758B1/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
    • F23N1/02—Regulating fuel supply conjointly with air supply
    • F23N1/025—Regulating fuel supply conjointly with air supply using electrical or electromechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/02—Air or combustion gas valves or dampers
    • F23N2235/10—Air or combustion gas valves or dampers power assisted, e.g. using electric motors
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00—Controlling
    • F23N2237/20—Controlling one or more bypass conduits

Definitions

  • the invention relates to a valve arrangement for selectively switching on and shutting off a secondary line, which opens into a main line of a fuel-fired heat generator carrying a fuel / air mixture controlled composition, and a fuel line assigned to the secondary line, via which a time constant is proportional to the air flow rate in the secondary line Amount of fuel is supplied, which corresponds to the fuel / air ratio in the mixture carried in the main line.
  • This patent application describes a device for regulating the output of fuel-fired, in particular gas-fired, heat generators, in which a fuel / air mixture is supplied to the heat generator via a main line, the composition of which is regulated by supplying the main line with a predetermined, time-constant fuel quantity and the air throughput in the main line is adjusted by means of a blower, the delivery rate of which is controlled by means of a control device as a function of the output signal of a flow sensor arranged in the main line and possibly further variables influencing the optimal fuel / air ratio.
  • the fuel / air mixture supplied to a burner via the main line therefore determines the minimum output of the heat generator.
  • the known device additionally has at least one secondary line through which an additional amount of fuel / air mixture can be supplied.
  • the invention has for its object to provide a valve assembly that allows the simultaneous connection or shutdown of a secondary line and the fuel line assigned to it and is characterized by simple structure and high reliability, so that they are also for use in heat generators of relatively low power can be used and thus makes such heat generators suitable for use in areas with relatively low heat requirements, such as in heating systems for single-family homes or even flats.
  • valve arrangement according to the invention When using the valve arrangement according to the invention, there is no need to install separate valves both in the secondary line and in the associated fuel line and, if necessary, to connect them to a common drive and also to provide special fittings such as T-pieces or the like in order to connect the fuel line with the Merging the secondary line and then the secondary line with the main line, since the valve arrangement according to the invention fulfills both the functions of two shut-off valves and the line mergers. In addition, there is no longer any need to connect two separate valves to a common actuator. Therefore, the valve arrangement according to the invention enables a significant simplification of the construction and a reduction in the space requirement of fuel-fired heat generators of the type described. The elimination of devices for coupling two separate valves simultaneously increases the operational safety and reliability of such a heat generator.
  • the application of the valve arrangement according to the invention is particularly advantageous if not only a sudden increase in the heating power by completely switching on the secondary line and the associated fuel line is desired, but a more or less constant change in the heating power, because in a further embodiment of the invention the mouths of the The secondary line and the fuel line have cross sections which are proportional to one another and the slide can be able to be brought into intermediate positions in which it releases or covers equal parts of the orifice cross sections. Since the throughput of the air supplied via the secondary line as well as the via the fuel line supplied fuel is proportional to the cross-section of the mouth, by changing the cross-sections of the mouth, the amount of such a mixture supplied in addition to the fuel / air mixture conveyed by the main line can be changed more or less continuously.
  • the slide is adjustable step by step, and the mouth of the fuel line is formed by a number of bores, one of which is released or covered at each step of the slide adjustment. If the mouth of the secondary line has a rectangular cross-section, the throughput of the secondary line is exactly proportional to the travel of the slide. In this case, either the mouth of the assigned fuel line can also have a rectangular cross-section, or all holes can have the same diameter when using holes.
  • the main line forms a chamber with an arcuate wall section at the point where the secondary line opens and the slide is designed as a rotary slide valve.
  • Rotary slide valve arrangements are particularly easy to manufacture and allow simple storage and particularly simple drive of the slide valve.
  • the fuel line can then open within the sector of the chamber defined by the mouth of the secondary line in a flat floor perpendicular to the circular wall section and the slide can have a spring-loaded insert resting on the floor. This design also leads to a particularly simple and space-saving construction.
  • the chamber can be formed in a particularly simple manner completely by a cylindrical pot that is open at one end, into the jacket of which, in addition to the secondary line, the section of the main line leading to an air inlet opening also opens, while the section of the main line leading to the burner of the heat generator is attached connects the open end of the pot.
  • a particularly space-saving arrangement results when both the section of the main line opening into the jacket of the chamber and the secondary line are formed by pipe sections with a rectangular cross section and these pipe sections abut one side.
  • a further simplification of the system for heat generation provided by means of such a valve arrangement is achieved if, in a further embodiment of the invention, the fuel line also opens into the bottom pot, which supplies the fuel quantity required to form the fuel / air mixture guided by the main line. It is then no longer necessary to install special fuel lines for the main line and the secondary line, but a lonely fuel line can be used, which is connected to the pot and opens into the pot with openings, one of which, which cannot be covered, opens the gas throughput for determines the amount of air required by the main line, whereas one or more other openings are assigned to the secondary line and, like the mouth opening of the secondary line, can optionally be covered or released by the slide.
  • the bottom of the pot can be formed by a disk in which there is an annular channel to which a common fuel line is connected and which is connected to the interior of the pot through openings which connect the mouths of the fuel lines assigned to the secondary line and the main line form.
  • the bottom of the chamber also permits the bearing of a shaft which is sealed off from the bottom and to which the slide is fastened inside the chamber and whose end penetrating the bottom is connected to a drive motor.
  • the heat generator shown in the drawing has a burner 1, to which a gas / air mixture is supplied via a main line 2, 2 '.
  • the burner 1 is located within a boiler housing 3, which also encloses the heat exchanger 4 of a heating system.
  • the boiler housing 3 is provided with a vent 5 for the flue gases, in which there is a fan 7 driven by a motor 6.
  • the main line 2, 2 ' connects the burner 1 to an air inlet opening 8.
  • a temperature continues to protrude into the section 2 of the main line sensor 9 and a flow sensor 10 into it.
  • the output signals of these sensors 9, 10 are fed to a control device 11.
  • a fuel line 13 opens into the main line 2 and supplies gas to the main line as fuel.
  • a gas pressure regulator 14 is located in the fuel line 13 in the flow direction of the gas, so that the main line 2, 2 'is supplied with the gas at a predetermined pressure and therefore also a predetermined amount.
  • the specified amount of gas includes a precisely determined amount of air.
  • the supply of the correct amount of air is monitored by the flow sensor 10, the output signal of which is characteristic of the flow velocity of the air in section 2 of the main line.
  • the control device 11 controls, depending on the output signals of the temperature sensor 9 and the flow sensor 10, the speed of the motor 6 which drives the fan 7 in such a way that the flow rate required to supply the correct amount of air prevails in section 2 of the main line. This ensures in a very simple manner that optimal combustion conditions are present for the gas supplied to the burner 1.
  • a secondary line 21 is connected in parallel with the main line 2, 2 'and opens into the main line 2, 2' in the area between the sensors 9, 10 and the burner 1. Similar to the main line 2, 2 ', the secondary line 21 also has an open end serving as an air inlet opening 22, and a fuel line 23 is also assigned to it, which branches off from the fuel line 13 opening into the main line 2, 2'.
  • a shut-off valve 24 is located in this fuel line 23.
  • a shut-off valve 25 is also located in the secondary line 21.
  • the shut-off valves 24 and 25 are connected to a common servomotor 26 which, if necessary, causes the shut-off valves 24, 25 to open and close together.
  • the check valves 24, 25 schematically shown in FIG. 1 for the secondary line 21 and the associated fuel line 23 are integrated in a valve arrangement which has a cylindrical pot 31, in the jacket 32 of which the Air inlet opening 8 leading section 2 of the main line and the secondary line 21 open.
  • both lines have the same rectangular cross-section in the exemplary embodiment shown and are arranged parallel to one another in such a way that they abut one side 27 and 28, respectively.
  • the section 2 ′ of the main line leading to the burner 1 connects to the open end of the pot 31.
  • the end of the pot 31 opposite the section 2 'of the main line is provided with a bottom 33 into which an annular channel 34 is incorporated.
  • the base 33 consists of two disc-shaped parts 35, 36, of which the upper part 36 has a groove forming the annular channel 34 on its side facing the lower part 35.
  • the lower disc-shaped part 35 is provided with a screw connection for the gas line 13, so that the gas line 13 opens into the annular channel 34.
  • This ring channel 34 communicates with the interior of the pot 31 via bores 37 and 38, of which the bore 37 is arranged in front of the mouth of section 2 of the main line and has a diameter such that the amount of gas entering the pot via this bore 37 corresponds to the minimum output of the burner, to which the amount of air flowing through the main line 2, 2 'is adjusted by means of the sensors 9, 10.
  • the bores 38 are arranged within the sector 39 delimited by dash-dotted lines in FIG. 2, which is defined by the mouth 40 of the secondary line 21 in the jacket 32 of the pot 31, and next to one another on a circular arc 41, likewise indicated by dash-dotted lines.
  • the bores 38 in their entirety form the fuel line 23 assigned to the secondary line 21.
  • the total cross section of these bores 38 is dimensioned such that the amount of gas supplied to the pot 31 via these bores is in the same ratio to the amount of air supplied via the secondary line 21 as that above the amount of gas supplied to the bore 37 to the amount of air supplied through the section 2 of the main line.
  • the amount of gas supplied via all of the bores 38 and the corresponding amount of air supplied via the secondary line 21 can be dimensioned such that the maximum output of the burner 1 is achieved together with the fuel / air mixture which is always carried by the main line 2, 2 ' .
  • the section 2 of the main line and the secondary line 21 leading to the air inlet opening 8 have the same cross section, so that the entirety of the bores 38 has the same cross section as the bore 37 and the heating power of the burner 1 is doubled by switching on the secondary line 21 can be.
  • a rotary slide valve 51 serves as shut-off valves 24, 25 for the secondary line 21 and the associated gas line 23, which is fastened on the inner end of a shaft 52 which is rotatably mounted in the base 33 and is sealed against the base in a manner not shown is.
  • This rotary slide valve has at its end a plate 53 which is circular in cross section and which in a first end position covers the mouth 40 of the secondary line 21 and thus blocks the secondary line 21.
  • the rotary slide 51 In its section connecting the plate 53 to the shaft 52, the rotary slide 51 has a bore 54 perpendicular to the bottom 33 of the pot, in which a stamp-like insert 55 is mounted displaceably and is loaded by a helical compression spring 56 arranged in the bore 54, so that the latter Insert with the outer surface of his head 57 abuts the bottom 33.
  • the diameter of the head 57 is dimensioned such that it completely covers the bores 38 arranged on the circular arc 41 when the plate 53 covers the mouth 40 of the secondary line 21.
  • the rotary valve 51 By pivoting the rotary valve 51 by an angle which is substantially equal to the angle of the sector 39 defined by the mouth 40 of the secondary line 21, the rotary valve 51 can be brought into a second end position, not shown in the drawing, in which the plate 53 the mouth 40 and also the head 57 of the insert 55 clears all the bores 38. If the rotary valve occupies a position lying between these two end positions, the mouth 40 of the secondary line 21 is only partially released.
  • the use of tubes with a rectangular cross section has the result that the mouth 40 of the secondary line also has a rectangular cross section and the released section of the secondary line is exactly proportional to the swivel angle of the rotary valve.
  • the use of a number of bores 38 as the mouth of the fuel line assigned to the secondary line 21 ensures that the amount of gas supplied is proportional to the number of bores released and thus in turn to the swivel angle of the rotary valve. It is advisable to gradually adjust the rotary valve so that each additional hole is completely released or covered. If a completely constant change in the heating output is desired, the row of holes could be replaced by a corresponding slot. It would also be possible to partially cover a larger bore similar to the mouth of the secondary line, in which case such a bore would correspond to a circular mouth of the secondary line. With regard to a linear dependence of the change in power on the angle of rotation, however, the described embodiment with a rectangular mouth of the secondary line and a correspondingly shaped mouth of the associated fuel line is preferred.
  • the drive motor 26 for the rotary valve 51 which corresponds to the two shut-off valves 24, 25 according to FIG. 1, is fastened to the base 33 of the pot 31 by means of a holder 61 such that the output shaft 62 of the motor with the rotary valve 51 supporting shaft 52 is aligned and can be connected to this shaft by a plug coupling 63.
  • the motor 26 can be a stepping motor, but it can also be a continuously running motor with appropriate control, which preferably has a strong reduction, since the rotary valve 51 may only be adjusted at a relatively low speed. Since the air throughput is determined by the delivery rate of the blower 7, the change in the line cross-sections and thus the fuel supply must not take place faster than the speed with which the blower 7 can react to the changed air requirement.
  • the invention is not limited to the exemplary embodiment shown, but deviations from it are possible without leaving the scope of the invention.
  • the cylindrical shape of the pot is only important for the pivoting range of the rotary valve, so that even when using a rotary valve, the chamber formed by the pot can also have a different cross-sectional shape, as long as only the secondary line into a cylindrical one Wall section opens and there is enough space to swing the rotary valve away.
  • a linearly movable valve can also be used and that it is possible to provide the mouths of the air and gas lines in the same wall section.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Magnetically Actuated Valves (AREA)
  • Compressor (AREA)

Abstract

A heat generator has, in addition to a main pipe (2) which conducts a fuel/air mixture of regulated composition, an alternatively connectable and disconnectable secondary pipe (21) with an associated fuel pipe. There is a requirement for a simply designed and reliable valve arrangement for connecting or disconnecting the secondary pipe and associated fuel pipe. The secondary pipe (21) and the fuel pipe open next to one another into the main pipe (2), preferably in the region of a chamber (31), and the mouths (38, 46) of both pipes are assigned a common slider (51) which can alternatively be brought into a position simultaneously opening or closing the two mouths. <IMAGE>

Description

Die Erfindung betrifft eine Ventilanordnung zum wahlweisen Zuschalten und Absperren einer Nebenleitung, die in einer ein Brennstoff/Luft-Gemisch geregelter Zusammensetzung führenden Hauptleitung eines brennstoffbefeuerten Wärmeerzeugers mündet, und einer der Nebenleitung zugeordneten Brennstoffleitung, über die eine dem Luftdurchsatz in der Nebenleitung proportionale, zeitlich konstante Brennstoffmenge zugeführt wird, die dem Brennstoff/Luft-Verhältnis in dem in der Hauptleitung geführten Gemisch entspricht.The invention relates to a valve arrangement for selectively switching on and shutting off a secondary line, which opens into a main line of a fuel-fired heat generator carrying a fuel / air mixture controlled composition, and a fuel line assigned to the secondary line, via which a time constant is proportional to the air flow rate in the secondary line Amount of fuel is supplied, which corresponds to the fuel / air ratio in the mixture carried in the main line.

Die ällere am 27.07.1988 veröffentlichen europäische Patentanmeldung 87117963.6 (Publizierungs nummer 275 439) genießt die Priorität vom 2.01. 1987 und gilt daher gemäß Artikel 54(3) und (4) EPÜ als Stand der Technik.The earlier European patent application 87117963.6 (publication number 275 439) published on July 27, 1988 has the priority of 2.01. 1987 and is therefore considered to be state of the art under Article 54 (3) and (4) EPC.

In dieser Patentanmeldung ist eine Einrichtung zur Leistungsregelung von brennstoffbefeuerten, insbesondere gasbefeuerten Wärmeerzeugern beschrieben, bei dem dem Wärmeerzeuger über eine Hauptleitung ein Brennstoff/Luft-Gemisch zugeführt wird, dessen Zusammensetzung dadurch geregelt wird, daß der Hauptleitung eine vorgegebene, zeitlich konstante Brennstoffmenge zugeführt wird und der Luftdurchsatz in der Hauptleitung mittels eines Gebläses eingestellt wird, dessen Förderleistung in Abhängigkeit von dem Ausgangssignal eines in der Hauptleitung angeordneten Strömungssensors und ggf. weiteren, das optimale Brennstoff/Luft-Verhältnis beeinflussenden Größen mittels einer Regeleinrichtung gesteuert wird. Das über die Hauptleitung einem Brenner zugeführte Brennstoff/Luft-Gemisch bestimmt demnach die minimale Leistung des Wärmeerzeugers. Die bekannte Einrichtung weist zusätzlich mindestens eine Nebenleitung auf, über die eine zusätzliche Menge Brennstoff/Luft-Gemisch zugeführt werden kann. Da auch bei Zuschalten der Nebenleitung die Strömungsgeschwindigkeit der Luft in der Hauptleitung durch Erhöhen der Förderleistung des Gebläses konstant gehalten wird, wird durch die Nebenleitung eine Luftmenge gefördert, die sich zu der durch die Hauptleitung geförderten Luftmenge ebenso verhält wie der Querschnitt der Nebenleitung zum Querschnitt der Hauptleitung. Demgemäß kann auch der Nebenleitung eine konstante Brennstoffmenge zugeführt werden, die sich zu der der Hauptleitung zugeführten Brennstoffmenge ebenso verhält wie die Querschnitte der Leitungen. Dabei ist es auch möglich, die Heizleistung schrittweise oder stetig zu erhöhen, indem die Querschnitte der Nebenleitung und der zugeordneten Brennstoffleitung schrittweise oder stetig und zueinander proportional verändert werden. Bei der in der europäischen Patentanmeldung 87117963.6 beschriebenen Anlage sind zu diesem Zweck in der Nebenleitung und der zugeordneten Brennstoffleitung motorisch verstellbare Absperrventile vorgesehen.This patent application describes a device for regulating the output of fuel-fired, in particular gas-fired, heat generators, in which a fuel / air mixture is supplied to the heat generator via a main line, the composition of which is regulated by supplying the main line with a predetermined, time-constant fuel quantity and the air throughput in the main line is adjusted by means of a blower, the delivery rate of which is controlled by means of a control device as a function of the output signal of a flow sensor arranged in the main line and possibly further variables influencing the optimal fuel / air ratio. The fuel / air mixture supplied to a burner via the main line therefore determines the minimum output of the heat generator. The known device additionally has at least one secondary line through which an additional amount of fuel / air mixture can be supplied. Since the flow velocity of the air in the main line is kept constant even when the secondary line is switched on by increasing the delivery capacity of the fan, an air volume is conveyed through the secondary line which is related to the air volume conveyed through the main line as well as the cross section of the secondary line to the cross section of the Main line. Accordingly, a constant amount of fuel can be supplied to the secondary line, which is related to the amount of fuel supplied to the main line as well as the cross sections of the lines. It is also possible to increase the heating output step by step or continuously by changing the cross sections of the secondary line and the associated fuel line step by step or continuously and in proportion to one another. In the system described in European patent application 87117963.6, motor-controlled shut-off valves are provided for this purpose in the secondary line and the associated fuel line.

Der Erfindung liegt die Aufgabe zugrunde, eine Ventilanordnung zu schaffen, die das gleichzeitige Zuschalten bzw. Absperren einer Nebenleitung und der ihr zugeordneten Brennstoffleitung gestattet und sich durch einfachen Aufbau und zugleich hohe Zuverlässigkeit auszeichnet, so daß sie auch für den Einsatz bei Wärmeerzeugern relativ kleiner Leistung eingesetzt werden kann und damit solche Wärmeerzeuger auch für den Einsatz auf Gebieten mit relativ geringem Wärmebedarf, wie beispielsweise in Heizungsanlagen für Einfamilienhäuser oder gar Etagenwohnungen, geeignet macht.The invention has for its object to provide a valve assembly that allows the simultaneous connection or shutdown of a secondary line and the fuel line assigned to it and is characterized by simple structure and high reliability, so that they are also for use in heat generators of relatively low power can be used and thus makes such heat generators suitable for use in areas with relatively low heat requirements, such as in heating systems for single-family homes or even flats.

Diese Aufgabe wird nach der Erfindung dadurch gelöst, daß die Nebenleitung und die Brennstoffleitung nebeneinander in die Hauptleitung münden und den Mündungen der beiden Leitungen ein gemeinsamer Schieber zugeordnet ist, der wahlweise in eine die beiden Mündungen gleichzeitig freigebende oder abdeckende Stellung bringbar ist.This object is achieved according to the invention in that the secondary line and the fuel line open side by side into the main line and the mouths of the two lines are assigned a common slide which can be brought into a position that simultaneously releases or covers the two mouths.

Bei Anwendung der erfindungsgemäßen Ventilanordnung entfällt die Notwendigkeit, sowohl in die Nebenleitung als auch in die zugeordnete Brennstoffleitung gesonderte Ventile einzubauen und ggf. mit einem gemeinsamen Antrieb zu verbinden und außerdem besondere Armaturen wie T-Stücke o. dgl. vorzusehen, um die Brennstoffleitung mit der Nebenleitung und dann die Nebenleitung mit der Hauptleitung zusammenzuführen, da die erfindungsgemäße Ventilanordnung sowohl die Funktionen zweier Absperrventile als auch der Leitungs-Zusammenführungen erfüllt. Außerdem besteht auch keine Notwendigkeit mehr, zwei getrennte Ventile an einen gemeinsamen Antrieb anzuschließen. Daher ermöglicht die erfindungsgemäße Ventilanordnung eine bedeutende Vereinfachung des Aufbaus und einer Verminderung des Platzbedarfes von brennstoffbefeuerten Wärmeerzeugern der beschriebenen Art. Der Wegfall von Einrichtungen zum Koppeln zweier getrennter Ventile erhöht zugleich die Betriebssicherheit und Zuverlässigkeit eines solchen Wärmeerzeugers.When using the valve arrangement according to the invention, there is no need to install separate valves both in the secondary line and in the associated fuel line and, if necessary, to connect them to a common drive and also to provide special fittings such as T-pieces or the like in order to connect the fuel line with the Merging the secondary line and then the secondary line with the main line, since the valve arrangement according to the invention fulfills both the functions of two shut-off valves and the line mergers. In addition, there is no longer any need to connect two separate valves to a common actuator. Therefore, the valve arrangement according to the invention enables a significant simplification of the construction and a reduction in the space requirement of fuel-fired heat generators of the type described. The elimination of devices for coupling two separate valves simultaneously increases the operational safety and reliability of such a heat generator.

Die Anwendung der erfindungsgemäßen Ventilanordnung ist dann von besonderem Vorteil, wenn nicht nur eine sprunghafte Erhöhung der Heizleistung durch vollständiges Zuschalten der Nebenleitung und der zugeordneten Brennstoffleitung gewünscht wird, sondern eine mehr oder weniger stetige Änderung der Heizleistung, weil in weiterer Ausgestaltung der Erfindung die Mündungen der Nebenleitung und der Brennstoffleitung zueinander proportionale Querschnitte haben und der Schieber in Zwischenstellungen bringbar sein kann, in denen er gleiche Anteile der Mündungsquerschnitte freigibt bzw. abdeckt. Da der Durchsatz der über die Nebenleitung zugeführten Luft wie auch des über die Brennstoffleitung zugeführten Brennstoffes dem Mündungsquerschnitt proportional ist, kann durch Verändern der Mündungsquerschnitte die zusätzlich zu dem von der Hauptleitung geförderten Brennstoff/Luft-Gemisch zugeführte Menge eines solchen Gemisches mehr oder weniger stetig verändert werden. Bei einer bevorzugten Ausführungsform der Erfindung ist der Schieber schrittweise verstellbar, und es wird die Mündung der Brennstoffleitung von einer Anzahl Bohrungen gebildet, von denen bei jedem Schritt der Schieberverstellung eine freigegeben bzw. abgedeckt wird. Hat die Mündung der Nebenleitung einen rechteckigen Querschnitt, so ist der Durchsatz der Nebenleitung dem Stellweg des Schiebers genau proportional. Dabei kann dann entweder die Mündung der zugeordneten Brennstoffleitung ebenfalls einen rechtekkigen Querschnitt haben oder es können bei der Verwendung von Bohrungen alle Bohrungen den gleichen Durchmesser haben.The application of the valve arrangement according to the invention is particularly advantageous if not only a sudden increase in the heating power by completely switching on the secondary line and the associated fuel line is desired, but a more or less constant change in the heating power, because in a further embodiment of the invention the mouths of the The secondary line and the fuel line have cross sections which are proportional to one another and the slide can be able to be brought into intermediate positions in which it releases or covers equal parts of the orifice cross sections. Since the throughput of the air supplied via the secondary line as well as the via the fuel line supplied fuel is proportional to the cross-section of the mouth, by changing the cross-sections of the mouth, the amount of such a mixture supplied in addition to the fuel / air mixture conveyed by the main line can be changed more or less continuously. In a preferred embodiment of the invention, the slide is adjustable step by step, and the mouth of the fuel line is formed by a number of bores, one of which is released or covered at each step of the slide adjustment. If the mouth of the secondary line has a rectangular cross-section, the throughput of the secondary line is exactly proportional to the travel of the slide. In this case, either the mouth of the assigned fuel line can also have a rectangular cross-section, or all holes can have the same diameter when using holes.

Für den mechanischen Aufbau einer solchen Ventilanordnung ist es von besonderem Vorteil, wenn die Hauptleitung an der Stelle der Einmündung der Nebenleitung eine Kammer mit einem kreisbogenförmigen Wandabschnitt bildet und der Schieber als Drehschieber ausgebildet ist. Drehschieberanordnungen sind besonders leicht herstellbar und gestatten eine einfache Lagerung sowie auch einen besonders einfachen Antrieb des Schiebers. Dabei kann dann die Brennstoffleitung innerhalb des durch die Mündung der Nebenleitung definierten Sektors der Kammer in einem zu dem kreisbogenförmigen Wandabschnitt senkrechten, ebenen Boden münden und der Schieber einen am Boden anliegenden, gefederten Einsatz aufweisen. Auch diese Gestaltung führt wieder zu einem besonders einfachen und raumsparenden Aufbau. Dabei kann die Kammer in besonders einfacher Weise vollständig von einem zylindrischen, an einem Ende offenen Topf gebildet werden, in dessen Mantel außer der Nebenleitung auch der zu einer Lufteintrittsöffnung führende Abschnitt der Hauptleitung mündet, während der zum Brenner des Wärmeerzeugers führende Abschnitt der Hauptleitung sich an das offene Ende des Topfes anschließt. Eine besonders raumsparende Anordnung ergibt sich dann, wenn sowohl der in den Mantel der Kammer mündende Abschnitt der Hauptleitung als auch die Nebenleitung von im Querschnitt rechteckigen Rohrabschnitten gebildet werden und diese Rohrabschnitte mit einer Seite aneinander anliegen.For the mechanical construction of such a valve arrangement, it is particularly advantageous if the main line forms a chamber with an arcuate wall section at the point where the secondary line opens and the slide is designed as a rotary slide valve. Rotary slide valve arrangements are particularly easy to manufacture and allow simple storage and particularly simple drive of the slide valve. The fuel line can then open within the sector of the chamber defined by the mouth of the secondary line in a flat floor perpendicular to the circular wall section and the slide can have a spring-loaded insert resting on the floor. This design also leads to a particularly simple and space-saving construction. The chamber can be formed in a particularly simple manner completely by a cylindrical pot that is open at one end, into the jacket of which, in addition to the secondary line, the section of the main line leading to an air inlet opening also opens, while the section of the main line leading to the burner of the heat generator is attached connects the open end of the pot. A particularly space-saving arrangement results when both the section of the main line opening into the jacket of the chamber and the secondary line are formed by pipe sections with a rectangular cross section and these pipe sections abut one side.

Eine weitere Vereinfachung der mittels einer solchen Ventilanordnung versehenen Anlage zur Wärmeerzeugung wird erzielt, wenn in weiterer Ausgestaltung der Erfindung in den Topf des Bodens auch die Brennstoffleitung mündet, die die zur Bildung des von der Hauptleitung geführten Brennstoff/Luft-Gemisches erforderliche Brennstoffmenge zuführt. Es ist dann nicht mehr die Installation besonderer Brennstoffleitungen für die Hauptleitung und die Nebenleitung erforderlich, sondern es kann eine einsame Brennstoffleitung verwendet werden, die an den Topf angeschlossen ist und mit Öffnungen in den Topf mündet, von denen eine, nicht abdeckbare Öffnung den Gasdurchsatz für die von der Hauptleitung geforderte Luftmenge bestimmt, wogegen eine oder mehrere andere Öffnungen der Nebenleitung zugeordnet sind und ebenso wie die Mündungsöffnung der Nebenleitung wahlweise durch den Schieber abgedeckt oder freigegeben werden können. So kann insbesondere der Boden des Topfes von einer Scheibe gebildet werden, in der sich ein Ringkanal befindet, an den eine gemeinsame Brennstoffleitung angeschlossen ist und der durch Öffnungen mit dem Inneren des Topfes verbunden ist, welche die Mündungen der der Nebenleitung sowie der Hauptleitung zugeordneten Brennstoffleitungen bilden.A further simplification of the system for heat generation provided by means of such a valve arrangement is achieved if, in a further embodiment of the invention, the fuel line also opens into the bottom pot, which supplies the fuel quantity required to form the fuel / air mixture guided by the main line. It is then no longer necessary to install special fuel lines for the main line and the secondary line, but a lonely fuel line can be used, which is connected to the pot and opens into the pot with openings, one of which, which cannot be covered, opens the gas throughput for determines the amount of air required by the main line, whereas one or more other openings are assigned to the secondary line and, like the mouth opening of the secondary line, can optionally be covered or released by the slide. In particular, the bottom of the pot can be formed by a disk in which there is an annular channel to which a common fuel line is connected and which is connected to the interior of the pot through openings which connect the mouths of the fuel lines assigned to the secondary line and the main line form.

Bei dieser Ausführungsform der Erfindung gestattet der Boden der Kammer zugleich das Lagern einer gegenüber dem Boden abgedichteten Welle, an der im Inneren der Kammer der Schieber befestigt ist und deren den Boden durchdringendes Ende mit einem Antriebsmotor verbunden ist.In this embodiment of the invention, the bottom of the chamber also permits the bearing of a shaft which is sealed off from the bottom and to which the slide is fastened inside the chamber and whose end penetrating the bottom is connected to a drive motor.

Die Erfindung wird im folgenden anhand des in der Zeichnung dargestellten Ausführungsbeispieles näher beschrieben und erläutert. Die der Beschreibung und der Zeichnung zu entnehmenden Merkmale können bei anderen Ausführungsformen der Erfindung einzeln für sich oder zu mehreren in beliebiger Kombination Anwendung finden. Es zeigen

  • Fig. 1 eine schematische Darstellung eines Wärmeerzeugers mit einer Ventilanordnung nach der Erfindung in schematischer Darstellung,
  • Fig. 2 einen Schnitt längs der Linie 11-11 durch eine Ausführungsform der in Fig. 1 nur schematisch dargestellte Ventilanordnung und
  • Fig. 3 einen Schnitt längs der Linie 111-111 durch die Ventilanordnung nach Fig. 2.
The invention is described and explained in more detail below with reference to the embodiment shown in the drawing. The features to be gathered from the description and the drawing can be used in other embodiments of the invention individually or in combination in any combination. Show it
  • 1 is a schematic representation of a heat generator with a valve arrangement according to the invention in a schematic representation,
  • Fig. 2 shows a section along the line 11-11 through an embodiment of the valve arrangement shown only schematically in Fig. 1 and
  • 3 shows a section along the line 111-111 through the valve arrangement according to FIG. 2nd

Der in der Zeichnung dargestellte Wärmeerzeuger weist einen Brenner 1 auf, dem über eine Hauptleitung 2, 2' ein Gas/Luft-Gemisch zugeführt wird. Der Brenner 1 befindet sich innerhalb eines Kesselgehäuses 3, das auch den Wärmeaustauscher 4 einer Heizungsanlage umschließt. Das Kesselgehäuse 3 ist mit einem Abzug 5 für die Rauchgase versehen, in dem sich ein von einem Motor 6 angetriebenes Gebläse 7 befindet.The heat generator shown in the drawing has a burner 1, to which a gas / air mixture is supplied via a main line 2, 2 '. The burner 1 is located within a boiler housing 3, which also encloses the heat exchanger 4 of a heating system. The boiler housing 3 is provided with a vent 5 for the flue gases, in which there is a fan 7 driven by a motor 6.

Die Hauptleitung 2, 2' verbindet den Brenner 1 mit einer Lufteintrittsöffnung 8. In den Abschnitt 2 der Hauptleitung ragen weiterhin ein Temperatursensor 9 und ein Strömungssensor 10 hinein. Die Ausgangssignale dieser Sensoren 9, 10 werden einer Regeleinrichtung 11 zugeführt. Im Bereich zwischen den Sensoren 9, 10 und dem Brenner 1 mündet in die Hauptleitung 2 eine Brennstoffleitung 13, die der Hauptleitung als Brennstoff Gas zuführt. In der Brennstoffleitung 13 befinden sich in der Strömungsrichtung des Gases hintereinander ein Gasdruckregler 14, so daß der Hauptleitung 2, 2' das Gas mit vorgegebenem Druck und daher auch vorgegebener Menge zugeführt wird. Um optimale Verbrennungsverhältnisse zu haben, gehört zu der vorgegebenen Gasmenge eine genau bestimmte Luftmenge. Die Zufuhr der richtigen Luftmenge wird durch den Strömungssensor 10 überwacht, dessen Ausgangssignal für die Strömungsgeschwindigkeit der Luft in dem Abschnitt 2 der Hauptleitung charakteristisch ist. Die Regeleinrichtung 11 steuert in Abhängigkeit von den Ausgangssignalen des Temperatursensors 9 und des Strömungssensors 10 die Drehzahl des zum Antrieb des Gebläses 7 dienenden Motors 6 in solcher Weise, daß in dem Abschnitt 2 der Hauptleitung die zur Zufuhr der richtigen Luftmenge erforderliche Strömungsgeschwindigkeit herrscht. Damit ist auf sehr einfache Weise gewährleistet, daß optimale Verbrennungsbedingungen für das dem Brenner 1 zugeführte Gas vorliegen.The main line 2, 2 'connects the burner 1 to an air inlet opening 8. A temperature continues to protrude into the section 2 of the main line sensor 9 and a flow sensor 10 into it. The output signals of these sensors 9, 10 are fed to a control device 11. In the area between the sensors 9, 10 and the burner 1, a fuel line 13 opens into the main line 2 and supplies gas to the main line as fuel. A gas pressure regulator 14 is located in the fuel line 13 in the flow direction of the gas, so that the main line 2, 2 'is supplied with the gas at a predetermined pressure and therefore also a predetermined amount. In order to have optimal combustion conditions, the specified amount of gas includes a precisely determined amount of air. The supply of the correct amount of air is monitored by the flow sensor 10, the output signal of which is characteristic of the flow velocity of the air in section 2 of the main line. The control device 11 controls, depending on the output signals of the temperature sensor 9 and the flow sensor 10, the speed of the motor 6 which drives the fan 7 in such a way that the flow rate required to supply the correct amount of air prevails in section 2 of the main line. This ensures in a very simple manner that optimal combustion conditions are present for the gas supplied to the burner 1.

Der Hauptleitung 2, 2' ist eine Nebenleitung 21 parallel geschaltet, die in die Hauptleitung 2, 2' im Bereich zwischen den Sensoren 9, 10 und dem Brenner 1 mündet. Ähnlich wie die Hauptleitung 2, 2' hat auch die Nebenleitung 21 ein als Lufteintrittsöffnung 22 dienendes, offenes Ende, und es ist auch ihr eine Brennstoffleitung 23 zugeordnet, die von der in die Hauptleitung 2, 2' mündenden Brennstoffleitung 13 abzweigt. In dieser Brennstoffleitung 23 befindet sich ein Absperrventil 24. Auch in der Nebenleitung 21 befindet sich ein Absperrventil 25. Die Absperrventile 24 und 25 sind mit einem gemeinsamen Stellmotor 26 verbunden der bei Bedarf das gemeinsame Öffnen bzw. Schließen der Absperrventile 24, 25 bewirkt.A secondary line 21 is connected in parallel with the main line 2, 2 'and opens into the main line 2, 2' in the area between the sensors 9, 10 and the burner 1. Similar to the main line 2, 2 ', the secondary line 21 also has an open end serving as an air inlet opening 22, and a fuel line 23 is also assigned to it, which branches off from the fuel line 13 opening into the main line 2, 2'. A shut-off valve 24 is located in this fuel line 23. A shut-off valve 25 is also located in the secondary line 21. The shut-off valves 24 and 25 are connected to a common servomotor 26 which, if necessary, causes the shut-off valves 24, 25 to open and close together.

Wie aus den Fig. 2 und 3 näher ersichtlich, sind die in Fig. 1 schematisch dargestellten Sperrventile 24, 25 für die Nebenleitung 21 und die zugeordnete Brennstoffleitung 23 in eine Ventilanordnung integriert, die einen zylindrischen Topf 31 aufweist, in dessen Mantel 32 der zur Lufteintrittsöffnung 8 führende Abschnitt 2 der Hauptleitung und die Nebenleitung 21 münden. Wie ersichtlich, haben beide Leitungen bei dem dargestellten Ausführungsbeispiel den gleichen rechteckigen Querschnitt und sind derart parallel zueinander angeordnet, daß sie mit einer Seite 27 bzw. 28 aneinander anliegen. Der zum Brenner 1 führende Abschnitt 2' der Hauptleitung schließt an das offene Ende des Topfes 31 an.As can be seen from FIGS. 2 and 3 in more detail, the check valves 24, 25 schematically shown in FIG. 1 for the secondary line 21 and the associated fuel line 23 are integrated in a valve arrangement which has a cylindrical pot 31, in the jacket 32 of which the Air inlet opening 8 leading section 2 of the main line and the secondary line 21 open. As can be seen, both lines have the same rectangular cross-section in the exemplary embodiment shown and are arranged parallel to one another in such a way that they abut one side 27 and 28, respectively. The section 2 ′ of the main line leading to the burner 1 connects to the open end of the pot 31.

Das dem Abschnitt 2' der Hauptleitung gegenüberliegende Ende des Topfes 31 ist mit einem Boden 33 versehen, in den ein Ringkanal 34 eingearbeitet ist. Zu diesem Zweck besteht der Boden 33 aus zwei scheibenförmigen Teilen 35, 36, von denen der obere Teil 36 an seiner dem unteren Teil 35 zugewandten Seite eine den Ringkanal 34 bildende Nut aufweist. Der untere scheibenförmige Teil 35 ist mit einem Schraubanschluß für die Gasleitung 13 versehen, so daß die Gasleitung 13 in den Ringkanal 34 mündet. Dieser Ringkanal 34 steht mit dem Innenraum des Topfes 31 über Bohrungen 37 und 38 in Verbindung, von denen die Bohrung 37 vor der Mündung des Abschnittes 2 der Hauptleitung angeordnet ist und einen solchen Durchmesser hat, daß die über diese Bohrung 37 in den Topf eintretende Gasmenge der Mindestleistung des Brenners entspricht, auf welche die die Hauptleitung 2, 2' durchströmende Luftmenge mittels der Sensoren 9, 10 eingestellt wird.The end of the pot 31 opposite the section 2 'of the main line is provided with a bottom 33 into which an annular channel 34 is incorporated. For this purpose, the base 33 consists of two disc-shaped parts 35, 36, of which the upper part 36 has a groove forming the annular channel 34 on its side facing the lower part 35. The lower disc-shaped part 35 is provided with a screw connection for the gas line 13, so that the gas line 13 opens into the annular channel 34. This ring channel 34 communicates with the interior of the pot 31 via bores 37 and 38, of which the bore 37 is arranged in front of the mouth of section 2 of the main line and has a diameter such that the amount of gas entering the pot via this bore 37 corresponds to the minimum output of the burner, to which the amount of air flowing through the main line 2, 2 'is adjusted by means of the sensors 9, 10.

Die Bohrungen 38 sind innerhalb des in Fig. 2 durch strichpunktierte Linien begrenzten Sektors 39, der durch die Mündung 40 der Nebenleitung 21 im Mantel 32 des Topfes 31 definiert wird, und nebeneinander auf einem ebenfalls strichpunktiert angedeuteten Kreisbogen 41 angeordnet. Die Bohrungen 38 bilden in ihrer Gesamtheit die der Nebenleitung 21 zugeordnete Brennstoffleitung 23. Der Gesamtquerschnitt dieser Bohrungen 38 ist so bemessen, daß die über diese Bohrungen dem Topf 31 zugeführte Gasmenge zu der über die Nebenleitung 21 zugeführten Luftmenge in dem gleichen Verhältnis steht wie die über die Bohrung 37 zugeführte Gasmenge zu der durch den Abschnitt 2 der Hauptleitung zugeführten Luftmenge. Dabei können die über die Gesamtheit der Bohrungen 38 zugeführte Gasmenge und die über die Nebenleitung 21 zugeführte, entsprechende Luftmenge so bemessen sein, daß zusammen mit dem von der Hauptleitung 2, 2' stets geführten Brennstoff/Luft-Gemisch die Maximalleistung des Brenners 1 erreicht wird. Bei dem dargestellten Ausführungsbeispiel haben der zur Lufteintrittsöffnung 8 führende Abschnitt 2 der Hauptleitung und die Nebenleitung 21 den gleichen Querschnitt, so daß auch die Gesamtheit der Bohrungen 38 den gleichen Querschnitt hat wie die Bohrung 37 und die Heizleistung des Brenners 1 durch Zuschalten der Nebenleitung 21 verdoppelt werden kann.The bores 38 are arranged within the sector 39 delimited by dash-dotted lines in FIG. 2, which is defined by the mouth 40 of the secondary line 21 in the jacket 32 of the pot 31, and next to one another on a circular arc 41, likewise indicated by dash-dotted lines. The bores 38 in their entirety form the fuel line 23 assigned to the secondary line 21. The total cross section of these bores 38 is dimensioned such that the amount of gas supplied to the pot 31 via these bores is in the same ratio to the amount of air supplied via the secondary line 21 as that above the amount of gas supplied to the bore 37 to the amount of air supplied through the section 2 of the main line. The amount of gas supplied via all of the bores 38 and the corresponding amount of air supplied via the secondary line 21 can be dimensioned such that the maximum output of the burner 1 is achieved together with the fuel / air mixture which is always carried by the main line 2, 2 ' . In the illustrated embodiment, the section 2 of the main line and the secondary line 21 leading to the air inlet opening 8 have the same cross section, so that the entirety of the bores 38 has the same cross section as the bore 37 and the heating power of the burner 1 is doubled by switching on the secondary line 21 can be.

Als Absperrventile 24, 25 für die Nebenleitung 21 und die zugeordnete Gasleitung 23 dient bei dem dargestellten Ausführungsbeispiel der Ventilanordnung ein Drehschieber 51, der auf dem inneren Ende einer in dem Boden 33 drehbar gelagerten und in nicht näher dargestellter Weise gegenüber dem Boden abgedichteten Welle 52 befestigt ist. Dieser Drehschieber weist an seinem Ende eine im Querschnitt kreisbogenförmige Platte 53 auf, die in einer ersten Endstellung die Mündung 40 der Nebenleitung 21 abdeckt und damit die Nebenleitung 21 absperrt. In seinem die Platte 53 mit der Welle 52 verbindenden Abschnitt weist der Drehschieber 51 eine zum Boden 33 des Topfes senkreche Bohrung 54 auf, in der ein stempelartiger Einsatz 55 verschiebbar gelagert und durch eine in der Bohrung 54 angeordnete Schraubendruckfeder 56 belastet ist, so daß dieser Einsatz mit der Außenfläche seines Kopfes 57 am Boden 33 anliegt. Der Durchmesser des Kopfes 57 ist so bemessen, daß er die auf dem Kreisbogen 41 angeordneten Bohrungen 38 vollständig abdeckt, wenn die Platte 53 die Mündung 40 der Nebenleitung 21 abdeckt. Durch Verschwenken des Drehschiebers 51 um einen Winkel, der im wesentlichen gleich dem Winkel des durch die Mündung 40 der Nebenleitung 21 definierten Sektors 39 gleich ist, kann der Drehschieber 51 in eine in der Zeichnung nicht dargestellte, zweite Endstellung gebracht werden, in welcher die Platte 53 die Mündung 40 und ebenso auch der Kopf 57 des Einsatzes 55 sämtliche Bohrungen 38 freigibt. Nimmt der Drehschieber eine zwischen diesen beiden Endstellungen liegende Stellung ein, wird die Mündung 40 der Nebenleitung 21 nur partiell freigegeben. Die Verwendung von Rohren mit rechteckigem Querschnitt hat zur Folge, daß auch die Mündung 40 der Nebenleitung einen rechteckigen Querschnitt hat und der freigegebene Abschnitt der Nebenleitung dem Schwenkwinkel des Drehschiebers genau proportional ist. Ebenso ist durch die Anwendung einer Anzahl von Bohrungen 38 als Mündung der der Nebenleitung 21 zugeordneten Brennstoffleitung gewährleistet, daß die zugeführte Gasmenge der Anzahl der freigegebenen Bohrungen und damit wiederum dem Schwenkwinkel des Drehschiebers proportional ist. Dabei ist es zweckmäßig, den Drehschieber schrittweise so zu verstellen, daß jeweils eine weitere Bohrung vollständig freigegeben oder abgedeckt wird. Wenn eine völlig stetige Veränderung der Heizleistung gewünscht wird, könnte die Reihe von Bohrungen durch einen entsprechenden Schlitz ersetzt werden. Ebenso wäre es möglich, eine größere Bohrung ähnlich wie die Mündung der Nebenleitung partiell abzudecken, wobei dann eine solche Bohrung einer kreisförmigen Mündung der Nebenleitung entsprechen wurde. Im Hinblick auf eine lineare Abhängigkeit der Leistungsänderung vom Drehwinkel wird jedoch die beschriebene Ausführungsform mit einer rechteckigen Mündung der Nebenleitung und einer entsprechend gestalteten Mündung der zugeordneten Brennstoffleitung bevorzugt.In the illustrated embodiment of the valve arrangement, a rotary slide valve 51 serves as shut-off valves 24, 25 for the secondary line 21 and the associated gas line 23, which is fastened on the inner end of a shaft 52 which is rotatably mounted in the base 33 and is sealed against the base in a manner not shown is. This rotary slide valve has at its end a plate 53 which is circular in cross section and which in a first end position covers the mouth 40 of the secondary line 21 and thus blocks the secondary line 21. In its section connecting the plate 53 to the shaft 52, the rotary slide 51 has a bore 54 perpendicular to the bottom 33 of the pot, in which a stamp-like insert 55 is mounted displaceably and is loaded by a helical compression spring 56 arranged in the bore 54, so that the latter Insert with the outer surface of his head 57 abuts the bottom 33. The diameter of the head 57 is dimensioned such that it completely covers the bores 38 arranged on the circular arc 41 when the plate 53 covers the mouth 40 of the secondary line 21. By pivoting the rotary valve 51 by an angle which is substantially equal to the angle of the sector 39 defined by the mouth 40 of the secondary line 21, the rotary valve 51 can be brought into a second end position, not shown in the drawing, in which the plate 53 the mouth 40 and also the head 57 of the insert 55 clears all the bores 38. If the rotary valve occupies a position lying between these two end positions, the mouth 40 of the secondary line 21 is only partially released. The use of tubes with a rectangular cross section has the result that the mouth 40 of the secondary line also has a rectangular cross section and the released section of the secondary line is exactly proportional to the swivel angle of the rotary valve. Likewise, the use of a number of bores 38 as the mouth of the fuel line assigned to the secondary line 21 ensures that the amount of gas supplied is proportional to the number of bores released and thus in turn to the swivel angle of the rotary valve. It is advisable to gradually adjust the rotary valve so that each additional hole is completely released or covered. If a completely constant change in the heating output is desired, the row of holes could be replaced by a corresponding slot. It would also be possible to partially cover a larger bore similar to the mouth of the secondary line, in which case such a bore would correspond to a circular mouth of the secondary line. With regard to a linear dependence of the change in power on the angle of rotation, however, the described embodiment with a rectangular mouth of the secondary line and a correspondingly shaped mouth of the associated fuel line is preferred.

Der besondere Vorteil der Erfindung besteht darin, daß durch die Verwendung eines gemeinsamen Schiebers zum Freigeben oder Absperren der Nebenleitung sowie der zugeordneten Brennstoffleitung keinerlei Probleme für den motorischen Antrieb der Ventilanordnung bestehen. Bei dem dargestellten Ausführungsbeispiel ist der Antriebsmotor 26 für den Drehschieber 51, der den beiden Absperrventilen 24, 25 nach Fig. 1 entspricht, mittels einer Halterung 61 an dem Boden 33 des Topfes 31 derart befestigt, daß die Abtriebswelle 62 des Motors mit der den Drehschieber 51 tragenden Welle 52 fluchtet und mit dieser Welle durch eine Steckkupplung 63 verbunden werden kann. Bei dem Motor 26 kann es sich um einen Schrittschaltmotor, aber auch um einen kontinuierlich laufenden Motor mit entsprechender Steuerung handeln, der vorzugsweise eine starke Untersetzung aufweist, da der Drehschieber 51 nur mit relativ geringer Geschwindigkeit verstellt werden darf. Da der Luftdurchsatz durch die Förderleistung des Gebläses 7 bestimmt wird, darf die Veränderung der Leitunsquerschnitte und damit der Brennstoffzufuhr nicht schneller erfolgen als mit der Geschwindigkeit, mit der das Gebläse 7 auf den veränderten Luftbedarf reagieren kann.The particular advantage of the invention is that there are no problems for the motor drive of the valve arrangement by using a common slide for releasing or shutting off the secondary line and the associated fuel line. In the illustrated embodiment, the drive motor 26 for the rotary valve 51, which corresponds to the two shut-off valves 24, 25 according to FIG. 1, is fastened to the base 33 of the pot 31 by means of a holder 61 such that the output shaft 62 of the motor with the rotary valve 51 supporting shaft 52 is aligned and can be connected to this shaft by a plug coupling 63. The motor 26 can be a stepping motor, but it can also be a continuously running motor with appropriate control, which preferably has a strong reduction, since the rotary valve 51 may only be adjusted at a relatively low speed. Since the air throughput is determined by the delivery rate of the blower 7, the change in the line cross-sections and thus the fuel supply must not take place faster than the speed with which the blower 7 can react to the changed air requirement.

Es versteht sich, daß die Erfindung nicht auf das dargestellte Ausführungsbeispiel beschränkt ist, sondern Abweichungen davon möglich sind, ohne den Rahmen der Erfindung zu verlassen. So ist beispielsweise ohne weiteres ersichtlich, daß die zylindrische Form des Topfes nur für den Schwenkbereich des Drehschiebers von Bedeutung ist, so daß selbst bei Verwendung eines Drehschiebers die von dem Topf gebildete Kammer auch eine andere Querschnittsform haben kann, solange nur die Nebenleitung in einen zylindrischen Wandabschnitt mündet und ausreichend Raum zum Wegschwenken des Drehschiebers vorhanden ist. Weiterhin ist ersichtlich, daß anstelle eines Drehschiebers auch ein geradlinig beweglicher Schieber Verwendung finden kann und daß es möglich ist, die Mündungen der Luft- und der Gasleitung in dem gleichen Wandabschnitt vorzusehen. Dabei besteht sowohl die Möglichkeit, diese Mündungen mit ausreichendem Abstand in der Bewegungsrichtung des Schiebers hintereinander als auch an der gleichen Wand senkrecht zur Bewegungsrichtung des Schiebers nebeneinander anzuordnen. Es sei auch erwähnt, daß bei Wärmeerzeugern, die eine solche Ventilanordnung aufweisen, das Gebläse an einem für die Hauptleitung und die Nebenleitung gemeinsamen Lufteinlaß angeordnet sein könnte. Angesichts all dieser vielen Möglichkeiten wird jedoch die dargestellte Ausführungsform der Ventilanordnung wegen ihrer besonders einfachen und kompakten Bauweise als optimale Verwirklichung der Erfindung angesehen.It is understood that the invention is not limited to the exemplary embodiment shown, but deviations from it are possible without leaving the scope of the invention. For example, it is readily apparent that the cylindrical shape of the pot is only important for the pivoting range of the rotary valve, so that even when using a rotary valve, the chamber formed by the pot can also have a different cross-sectional shape, as long as only the secondary line into a cylindrical one Wall section opens and there is enough space to swing the rotary valve away. It can also be seen that instead of a rotary valve, a linearly movable valve can also be used and that it is possible to provide the mouths of the air and gas lines in the same wall section. There is the possibility of arranging these orifices one behind the other at a sufficient distance in the direction of movement of the slide and also on the same wall perpendicular to the direction of movement of the slide. It should also be mentioned that in the case of heat generators which have such a valve arrangement, the fan could be arranged at an air inlet common to the main line and the secondary line. In view of all these many possibilities, however, the illustrated embodiment of the valve arrangement is regarded as the optimal implementation of the invention because of its particularly simple and compact design.

Claims (11)

1. Valve arrangement for the selective closing and insulating of a secondary pipe which opens into a main pipe of a fuel-burning heat generator, which main pipe conducts an air/fuel mixture, and of a fuel pipe which is associated with the secondary pipe, and via which a quantity of fuel is supplied, proportional to the air flow rate in the secondary pipe and constant in time and corresponds to the air/fuel ratio of the mixture conveyed in the main pipe, characterised in that the secondary pipe (21) and the fuel pipe (23) open, adjacent to each other, into the main pipe (2, 2') and there is, associated with the apertures (40, 38) of both pipes, a gate valve (51) which may be brought into position as desired, either to release both the apertures (40, 38) simultaneously or to cover them.
2. Valve arrangement according to claim 1, characterised in that the apertures (40, 38) of the secondary pipe (21) and of the fuel pipe (23) have cross-sections proportional to each other and the gate valve (51) can be brought into intermediate positions, in which it recesses or covers equal portions of the cross-sections of the mouths.
3. Valve arrangement according to claim 2, characterised in that the gate valve (51) can be adjusted in stages and the apertures (38) of the fuel pipe (23) is formed of a number of bores, of which one is released or covered at each stage of the movement of the gate valve.
4. Valve arrangement according to one of the preceding claims, characterised in that the aperture (46) of the secondary pipe (21) has a rectangular cross-section.
5. Valve arrangement according to one of the preceding claims, characterised in that the main pipe (2, 2') forms, at the place where the secondary pipe (21) opens into it, a chamber (31), the wall section (32) of which is in the form of an arc, and the gate valve (51) is formed as a rotary slide valve.
6. Valve arrangement according to claim 5, characterised in that the fuel pipe (23) terminates, inside the sector (39) of the chamber (31) defined by the aperture (40) of the secondary pipe (21) in a flat base (33) which is perpendicular to the arc-formed wall section (32), and the gate valve (51) comprises a resilient element (55) which abuts on the base
7. Valve arrangement according to claim 5 or 6, characterised in that the chamber (31) is formed by a cylindrical container which is open at one end and in the casing (32) of which there terminates, in addition to the secondary pipe (21), a section (2) of the main pipe leading to an air inlet aperture (8), while the section (2') of the main pipe leading to the burner (1) of the heat generator is connected to the open end of the container.
8. Valve arrangement according to claim 7, characterised in that the section (2) of the main pipe which terminates in the casing (32) of the chamber (31), and the secondary pipe (21) are formed of pipe sections that are rectangular in cross-section and which abut against each other on one side (27, 28).
9. Valve arrangement according to claim 7 or 8, characterised in that the fuel pipe (13), which supplies the required amount of fuel to form the air/fuel mixture conveyed by the main pipe (2, 2'), also terminates in the base (33) of the container (31).
10. Valve arrangement according to one of claims 7 to 9, characterised in that the base (33) of the container (31) is formed by a disk, in which there is located a ring duct (34), to which a common fuel pipe (13) is connected and which is connected to the inside of the container (31) via apertures (37, 38) which form the aperture of the fuel pipe associated with the secondary pipe (21) and if necessary also with the main pipe (2,2').
11. Valve arrangement according to one of claims 7 to 10, characterised in that the gate valve (51) is secured on a shaft (52), which is mounted in the base (33) of the chamber (31), is sealed with respect to the base, and is connected to the external side of the base (13) by a driving motor (26).
EP88102493A 1987-03-17 1988-02-20 Valve arrangement Expired - Lifetime EP0282758B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88102493T ATE68580T1 (en) 1987-03-17 1988-02-20 VALVE ARRANGEMENT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3708573 1987-03-17
DE19873708573 DE3708573A1 (en) 1987-03-17 1987-03-17 VALVE ARRANGEMENT

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EP0282758A2 EP0282758A2 (en) 1988-09-21
EP0282758A3 EP0282758A3 (en) 1988-12-14
EP0282758B1 true EP0282758B1 (en) 1991-10-16

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EP88102493A Expired - Lifetime EP0282758B1 (en) 1987-03-17 1988-02-20 Valve arrangement

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EP (1) EP0282758B1 (en)
AT (1) ATE68580T1 (en)
DE (2) DE3708573A1 (en)

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US8839815B2 (en) 2011-12-15 2014-09-23 Honeywell International Inc. Gas valve with electronic cycle counter
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
US8947242B2 (en) 2011-12-15 2015-02-03 Honeywell International Inc. Gas valve with valve leakage test
US9074770B2 (en) 2011-12-15 2015-07-07 Honeywell International Inc. Gas valve with electronic valve proving system
US9234661B2 (en) 2012-09-15 2016-01-12 Honeywell International Inc. Burner control system
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GB9618612D0 (en) * 1996-09-06 1996-10-16 Hepworth Heating Ltd Control mechanisms for gas fires
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US8839815B2 (en) 2011-12-15 2014-09-23 Honeywell International Inc. Gas valve with electronic cycle counter
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
US8947242B2 (en) 2011-12-15 2015-02-03 Honeywell International Inc. Gas valve with valve leakage test
US9074770B2 (en) 2011-12-15 2015-07-07 Honeywell International Inc. Gas valve with electronic valve proving system
US9557059B2 (en) 2011-12-15 2017-01-31 Honeywell International Inc Gas valve with communication link
US9234661B2 (en) 2012-09-15 2016-01-12 Honeywell International Inc. Burner control system

Also Published As

Publication number Publication date
EP0282758A2 (en) 1988-09-21
ATE68580T1 (en) 1991-11-15
DE3865467D1 (en) 1991-11-21
EP0282758A3 (en) 1988-12-14
DE3708573A1 (en) 1988-09-29

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