EP0272348B1 - Gas regulation apparatus having a servo pressure regulator - Google Patents

Gas regulation apparatus having a servo pressure regulator Download PDF

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Publication number
EP0272348B1
EP0272348B1 EP86118069A EP86118069A EP0272348B1 EP 0272348 B1 EP0272348 B1 EP 0272348B1 EP 86118069 A EP86118069 A EP 86118069A EP 86118069 A EP86118069 A EP 86118069A EP 0272348 B1 EP0272348 B1 EP 0272348B1
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EP
European Patent Office
Prior art keywords
armature
valve
spring
control apparatus
gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP86118069A
Other languages
German (de)
French (fr)
Other versions
EP0272348A1 (en
Inventor
Cornelis Anthonius Kragten
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.)
Honeywell BV
Original Assignee
Honeywell BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Honeywell BV filed Critical Honeywell BV
Priority to EP86118069A priority Critical patent/EP0272348B1/en
Priority to DE8686118069T priority patent/DE3666289D1/en
Priority to US07/116,998 priority patent/US4785846A/en
Priority to JP62292931A priority patent/JPS63163516A/en
Priority to DK674687A priority patent/DK674687A/en
Publication of EP0272348A1 publication Critical patent/EP0272348A1/en
Application granted granted Critical
Publication of EP0272348B1 publication Critical patent/EP0272348B1/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/005—Regulating fuel 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
    • F23N2235/12—Fuel valves
    • F23N2235/14—Fuel valves electromagnetically operated
    • 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
    • F23N2235/16—Fuel valves variable flow or proportional 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
    • F23N2235/18—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
    • F23N2235/20—Membrane 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7758—Pilot or servo controlled
    • Y10T137/7762—Fluid pressure type
    • Y10T137/7764—Choked or throttled pressure type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7782—With manual or external control for line valve

Definitions

  • the invention relates to a gas control device according to the preamble of claim 1.
  • a gas control device with a servo pressure regulator is known, the setpoint of which can be adjusted with the aid of an electromagnetic drive placed on the pressure regulator. It receives the supply gas pressure at the inlet of the gas control unit as auxiliary energy via a throttle and a solenoid valve. It regulates the pressure at the outlet of the gas control device, which for this purpose acts on a membrane that bears against a control spring on the opposite side.
  • the support point of this control spring which is fixed to the housing, is adjusted by the magnetic drive mentioned, whereby the setpoint of the pressure regulator can be set.
  • the object of the invention is to provide a simplified control device, which can also be easily adapted to different operating conditions of the connected gas consumer.
  • an upper housing part 1 carries an electromagnet 2, a servo pressure regulator 3 and a switch-on valve 4.
  • the actual spatial position of the servo pressure regulator 3 and the switch-on valve 4 is shown in Fig. 1, while in Fig. 1 b the switch-on valve 4 compared to the servo pressure regulator 3 is shown offset laterally by the amount A to the left in order to avoid mutual concealment.
  • the electromagnet 2 consists of a yoke 5, an armature 7, which is tiltably attached to it via a spring plate 6, a magnetic core 8 and an excitation coil 9 surrounding it.
  • the servo pressure regulator 3, likewise carried by the upper housing part 1, consists of a membrane 11, a control spring 12, one of the diaphragm 11 carried closing body 13 and a valve seat 14 cooperating therewith, the closing body and valve seat forming a servo valve.
  • the control spring 12 is placed with its end facing away from the membrane 11 on a holding piece 15 which sits at the free end of the actuating pin 16.
  • the membrane chamber 17 between the membrane 11 and the valve seat 14 is connected via a channel 18 to the outlet side 19 of the gas control valve.
  • the space 20 below the valve seat 14 communicates with the inlet 22 of the gas control device via the on-off valve 4 and a throttle point 21 and forms the drive chamber of the membrane-operated gas control valve.
  • valve seat 23 located between gas inlet 22 and gas outlet 19 and an associated closing body 25, which is biased in the closing direction by a spring 24 and which is acted upon by the pressure in the drive chamber 20 in the opening direction via a membrane 26.
  • the gas control valve 23 to 26 is accommodated in a lower housing part 27, which is screwed to the upper housing part 1 with the interposition of a sealing plate 28.
  • the control valve 23, 25 is opened further via the membrane 26 than when the control pressure is low.
  • the closing body 13 can lift off the valve seat 14 in order to reduce the control pressure in the chamber 20 via the membrane chamber 17 and the channel 18 to the outlet 19 of the gas control device.
  • the structure and mode of operation of such servo pressure regulators are known per se, for example from EP-PS 00 62 856 and 00 39 000.
  • the upper housing part 1 still carries the on-off valve 4 shown in FIGS. 1 and 1 c, consisting of a valve seat 31 and a closing body 33 fastened to the valve rod 32 and a second valve seat 34 opposite the seat 31, which has a passage 35 to the outlet 19 of the Has gas control device.
  • a sealing membrane 36 seals the chamber 37 above the valve seat 31 with respect to the valve rod 32 penetrating this membrane. Via the throttle point 21, the chamber 37 is connected to the inlet 22 of the gas control device.
  • the space between the two valve seats 31 and 34 of the on-off valve 4 is connected to the drive chamber 20 (see FIG. 1b) via a channel 38.
  • a closing spring 39 is supported on one side on the upper housing part 1 and, on the other hand, rests on a collar 40 of the valve rod 32. It pretensions the closing body 33 of the on-off valve 4 in the closing direction of the valve seat 31.
  • the on-off valve 31, 33 is opened, the input gas pressure reaches the drive chamber 20 via the throttle point 21.
  • the drive chamber of the control valve 23 to 26 is supplied with the required auxiliary energy, namely the input gas pressure. If the gas pressure at the outlet 19 rises above a desired value specified by the actuating pin 16 via the control spring 12, then this displaces the output pressure acting on the underside of the control membrane 11 and lifts the closing body 13 from the valve seat 14.
  • the control pressure in the drive chamber 20 is partially reduced to the outlet 19 via the valve 13/14. As a result of this reduction in the control pressure in the chamber 20, the closing spring 24 of the control valve can close the closing body 25 thereof move the closed position.
  • a leaf spring 42 is attached to the armature 7 of the electromagnet by means of two rivets 41, the free end 43 of which acts on the valve rod 32 of the on-off valve 4.
  • the valve rod 32 is provided with a collar 44, against which the free end 43 of the leaf spring 42, which is provided with a hole, bears.
  • a reduced-diameter end piece 45 of the valve rod 22 carries a locking ring 46 in a circumferential groove.
  • the valve rod 32 is under the influence of the return spring 39, which is supported on the one hand fixed to the housing on an intermediate wall 47 and on the other hand on the collar 40 of the valve rod 32. It acts in the closing direction of the switch-on valve 31, 33.
  • a relatively rigid arm 52 in the form of a flat sheet is fastened to the armature 7 by means of two rivets 51, the free end 53 of which has a hole 54 through which a reduced-diameter end piece 55 of the actuating pin 16 projects.
  • the pin has a collar 56, against which the free end 53 of the arm 52 lies during operation and thus takes the pin 16 with it.
  • the movement of the pin 16 in the axial direction is limited by two stops in the form of snap rings 57 and 58.
  • the snap ring 57 interacts with a screw sleeve 59 which is adjustable in a bushing 60 by screwing.
  • the bushing 60 in turn can be adjusted in the thread 61 of the tubular piece 62 fixed to the housing.
  • the cantilever 52 as shown in FIG. 1 b, has its free end bent away from the plane of the armature 7 and stands under the pretensioning of a cylinder head screw 63 screwed into a threaded hole of the armature 7, the head of which rests on the arm 52 in the direction presses the anchor 7.
  • the armature 7 is pressed away from the pole piece 65 of the magnetic core 8 by a return spring 64.
  • the spring 64 is supported on the one hand on the upper housing part 1 and on the other hand carries at its free end a transmission piece 66, into which an adjusting screw 67 adjustable in the armature 7 projects with its pin extension 68.
  • the return spring 64 presses the armature 7 away from the pole piece 65 via the adjusting screw 67.
  • the armature is also influenced by the valve rod 32, which is prestressed by the closing spring 39 and which also tries to push the armature away from the pole piece 65 via the collar 44 and the leaf spring 42.
  • the closing spring 39 keeps the on-off valve 31, 33 closed via the collar 40 and the valve rod 32, while the closing spring 24 also keeps the closing body 25 of the gas control valve in the closed position.
  • the outlet pressure P at the outlet 19 of the gas control device is zero (see FIG. 3).
  • the actuating pin 16 rests on the bush 60 with its snap ring 58.
  • the control spring 12 thus has the lowest possible preload.
  • the armature 7 tilts around the spring joint 6 and, with the leaf spring 42, presses the valve rod 32 downward against the force of the return spring 39, so that the closing body 33 lifts off the valve seat 31 and Gas can flow from the inlet 22 of the gas control device via the nozzle 21 through the on-off valve 31, 33 into the drive chamber 20 of the diaphragm drive for the gas control valve 23 to 26.
  • the closing body 33 closes the opposite valve seat 34 and thus blocks the connection of the drive chamber 20 via the passage 35 to the outlet 19.
  • the diaphragm 26 moves the closing body 25 downward via the plunger 29 lifts it off the valve seat 23. This allows gas to flow from inlet 22 to outlet 19.
  • the output pressure at the outlet 19 also reaches the chamber 17 below the control membrane 11 of the pressure regulator via the channel 18. If the output pressure rises above the value at which the force of the control spring 12 acting on the diaphragm 11 from above exceeds the force exerted on the diaphragm 11 by the gas pressure in the chamber 17 from below, the closing body 13 lifts off the valve seat 14, and the control pressure prevailing in the drive chamber 20 is reduced through the control valve 13, 14 and through the channel 18 to the outlet 19.
  • the actuating pin 16 is taken down with the cantilever 52 and the control spring 12 is compressed. This increases the force acting on the upper side of the membrane 11 and determining the target value of the outlet pressure of the gas control device. The further the actuating pin 16 is pressed down, the greater this force and the greater the output pressure of the gas control device which is effective in the chamber 17 and is supplied via the channel 18 before it closes the closing body 13 of the blow-off valve 13, 14 via the membrane 11 can take off from its seat 14.
  • the actuating plunger 16 will be displaced so far down that the snap ring 57 bears against the screw sleeve 59.
  • the maximum outlet pressure Pmax is reached. This can be adjusted by adjusting the screw sleeve 59 in the socket 60.
  • the minimum outlet pressure Pmin can be set by adjusting the bushing 60 in the thread 61 of the tubular piece 62 fixed to the housing.
  • the return spring 64 is also put under tension during the further movement of the armature 7. It thus supports the control spring 12, and by adjusting the adjusting screw 67 the size or the influence of the restoring force exerted by the spring 64 on the armature 7 can be adjusted. This enables the slope of the pressure / current characteristic in the modulation range to be set.
  • the amount of the dead zone Z is predetermined by the screw 63, the head of which rests against the arm 52, the spread of which from the plane of the armature 7 is determined.
  • a non-magnetic spacer 70 on the armature 7 ensures that the armature can under no circumstances bear against and adhere to the pole piece 65.
  • the current i is interrupted, whereby the armature 7, under the influence of the return spring 64 and the control spring 12, returns to the rest position shown in FIGS Return spring 39 can move the closing body 33 back into the closed position shown in FIG. 2a.
  • the pressure regulator is thus cut off from the inlet pressure via the closing body 33, and the control pressure prevailing in the control chamber 20 escapes via the channel 35 to the outlet.
  • the closing spring 24 of the gas control valve moves the closing body 25 in the closed position.
  • An important advantage of the invention is that with a single magnetic drive and using conventional springs and other components, both the actuation of the switch-on solenoid valve and the control of the setpoint of the servo pressure regulator is achieved by an electrical current.
  • the setpoint can be continuously adjusted between a minimum value and a maximum value of the device outlet pressure. Both the minimum and the maximum pressure can be set separately, and the slope of the control characteristic in the modulation range can also be changed. The result is a versatile gas control device that can be easily adapted to different operating conditions.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Fluid Pressure (AREA)

Description

Die Erfindung bezieht sich auf ein Gasregelgerät nach dem Oberbegriff des Anspruchs 1.The invention relates to a gas control device according to the preamble of claim 1.

Aus EP-B1 0062856 ist ein Gasregelgerät mit Servodruckregler bekannt, dessen Sollwert mit Hilfe eines auf den Druckregler aufgesetzten Elektromagnetantriebs verstellbar ist. Er erhält als Hilfsenergie über eine Drosselstelle und ein Einschaltmagnetventil den am Einlaß des Gasregelgeräts anstehenden Versorgungsgasdruck. Er regelt den Druck am Ausgang des Gasregelgerätes, welcher zu diesem Zweck auf eine Membran einwirkt, die auf der gegenüberliegenden Seite an einer Regelfeder anliegt. Der gehäusefeste Abstützpunkt dieser Regelfeder wird durch den genannten Magnetantrieb verstellt, wodurch der Sollwert des Druckreglers einstellbar ist.From EP-B1 0062856 a gas control device with a servo pressure regulator is known, the setpoint of which can be adjusted with the aid of an electromagnetic drive placed on the pressure regulator. It receives the supply gas pressure at the inlet of the gas control unit as auxiliary energy via a throttle and a solenoid valve. It regulates the pressure at the outlet of the gas control device, which for this purpose acts on a membrane that bears against a control spring on the opposite side. The support point of this control spring, which is fixed to the housing, is adjusted by the magnetic drive mentioned, whereby the setpoint of the pressure regulator can be set.

Aufgabe der Erfindung ist es, ein demgegenüber vereinfachtes Regelgerät zu schaffen, welches zudem leicht an unterschiedliche Betriebsbedingungen des angeschlossenen Gasverbrauchers angepaßt werden kann.The object of the invention is to provide a simplified control device, which can also be easily adapted to different operating conditions of the connected gas consumer.

Diese Aufgabe wird durch das in Anspruch 1 angegebene Gasregelgerät gelöst.This object is achieved by the gas control device specified in claim 1.

Vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen. Sie wird nachfolgend anhand eines in der Zeichnung wiedergegebenen Ausfürungsbeispieles erläutert. Dabei zeigt:

  • Fig. 1 in Draufsicht (Fig. 1 a), sowie in zwei orthogonalen Schnitten (Fig. 1 b und 1 c) die hier interessierenden Teile des Gasregelgeräts, nämlich den Elektromagnetantrieb, das Einschaltventil den Servodruckregler und das Hauptregelventil;
  • Fig. 2 schematisch die Wirkverbindung zwischen dem Anker des Elektromagneten einerseits und der Ventilstange des Einschaltventils sowie dem Betätigungsstift des Druckreglers andererseits in verschiedenen Betriebsstellungen;
  • Fig. 3 den Verlauf des Ausgangsdrucks P des Druckreglers in Abhängigkeit vom Strom i durch die Spule des Elektromagneten.
Advantageous embodiments of the invention result from the subclaims. It is explained below using an exemplary embodiment shown in the drawing. It shows:
  • Fig. 1 in plan view (Fig. 1 a), and in two orthogonal sections (Fig. 1 b and 1 c) the parts of the gas control device of interest here, namely the solenoid drive, the on-off valve, the servo pressure regulator and the main control valve;
  • 2 schematically shows the operative connection between the armature of the electromagnet on the one hand and the valve rod of the on-off valve and the actuating pin of the pressure regulator on the other hand in different operating positions;
  • Fig. 3 shows the course of the output pressure P of the pressure regulator as a function of the current i through the coil of the electromagnet.

In Fig. 1 trägt ein Gehäuseoberteil 1 einen Elektromagneten 2, einen Servodruckregler 3 sowie ein Einschaltventil 4. Dabei ist in Fig. 1 die tatsächliche räumliche Lage von Servodruckregler 3 und Einschaltventil 4 wiedergegeben, während in Fig. 1 b das Einschaltventil 4 gegenüber dem Servodruckregler 3 um den Betrag A nach links seitlich versetzt dargestellt ist, um ein gegenseitiges verdecken zu vermeiden. Der Elektromagnet 2 besteht aus einem Joch 5, einem über ein Federblech 6 hieran kippbar befestigten Anker 7, einem Magnetkern 8 und einer diesen umgebenden Erregerspule 9. Der ebenfalls vom Gehäuseoberteil 1 getragene Servodruckregler 3 besteht aus einer Membran 11, einer Regelfeder 12, einem von der Membran 11 getragenen Schließkörper 13 sowie einem mit diesem zusammenwirkenden Ventilsitz 14, wobei Schließkörper und Ventilsitz ein Servoventil bilden. Die Regelfeder 12 ist mit ihrem der Membran 11 abgewandten Ende auf ein Haltestück 15 aufgesetzt, das am freien Ende des Betätigungsstifts 16 sitzt. Die Membrankammer 17 zwischen Membran 11 und Ventilsitz 14 ist über einen Kanal 18 an die Auslaßseite 19 des Gasregelventils angeschlossen. Der Raum 20 unterhalb des Ventilsitzes 14 steht einerseits über das Einschaltventil 4 und eine Drosselstelle 21 mit dem Einlaß 22 des Gasregelgeräts in Verbindung und bildet andererseits die Antriebskammer des membranbetätigten Gasregelventils. Dieses besteht aus einem zwischen Gaseinlaß 22 und Gasauslaß 19 befindlichen Ventilsitz 23 und einem zugehörigen, in Schließrichtung durch eine Feder 24 vorgespannten Schließkörper 25, der über eine Membran 26 vom Druck in der Antriebskammer 20 in Öffnungsrichtung beaufschlagt ist. Das Gasregelventil 23 bis 26 ist in einem Gehäuseunterteil 27 untergebracht, welches unter Zwischenfügung einer Dichtplatte 28 mit dem Gehäuseoberteil 1 verschraubt ist.In Fig. 1, an upper housing part 1 carries an electromagnet 2, a servo pressure regulator 3 and a switch-on valve 4. The actual spatial position of the servo pressure regulator 3 and the switch-on valve 4 is shown in Fig. 1, while in Fig. 1 b the switch-on valve 4 compared to the servo pressure regulator 3 is shown offset laterally by the amount A to the left in order to avoid mutual concealment. The electromagnet 2 consists of a yoke 5, an armature 7, which is tiltably attached to it via a spring plate 6, a magnetic core 8 and an excitation coil 9 surrounding it. The servo pressure regulator 3, likewise carried by the upper housing part 1, consists of a membrane 11, a control spring 12, one of the diaphragm 11 carried closing body 13 and a valve seat 14 cooperating therewith, the closing body and valve seat forming a servo valve. The control spring 12 is placed with its end facing away from the membrane 11 on a holding piece 15 which sits at the free end of the actuating pin 16. The membrane chamber 17 between the membrane 11 and the valve seat 14 is connected via a channel 18 to the outlet side 19 of the gas control valve. The space 20 below the valve seat 14 communicates with the inlet 22 of the gas control device via the on-off valve 4 and a throttle point 21 and forms the drive chamber of the membrane-operated gas control valve. This consists of a valve seat 23 located between gas inlet 22 and gas outlet 19 and an associated closing body 25, which is biased in the closing direction by a spring 24 and which is acted upon by the pressure in the drive chamber 20 in the opening direction via a membrane 26. The gas control valve 23 to 26 is accommodated in a lower housing part 27, which is screwed to the upper housing part 1 with the interposition of a sealing plate 28.

Bei hohem Steuerdruck in der Kammer 20 wird über die Membran 26 das Regelventil 23, 25 weiter geöffnet als bei niedrigem Steuerdruck. Zur Verringerung des Steuerdrucks in der Antriebskammer 20 kann der Schließkörper 13 vom Ventilsitz 14 abheben, um den Steuerdruck in der Kammer 20 über die Membrankammer 17 und den Kanal 18 zum Auslaß 19 des Gasregelgeräts hin abzubauen. Aufbau und Wirkungsweise solcher Servodruckregler sind an sich bekannt, beispielsweise aus EP-PS 00 62 856 und 00 39 000.When the control pressure in the chamber 20 is high, the control valve 23, 25 is opened further via the membrane 26 than when the control pressure is low. To reduce the control pressure in the drive chamber 20, the closing body 13 can lift off the valve seat 14 in order to reduce the control pressure in the chamber 20 via the membrane chamber 17 and the channel 18 to the outlet 19 of the gas control device. The structure and mode of operation of such servo pressure regulators are known per se, for example from EP-PS 00 62 856 and 00 39 000.

Schließlich trägt das Gehäuseoberteil 1 noch das in Fig. 1 und 1 c dargestellte Einschaltventil 4, bestehend aus einem Ventilsitz 31 und einem an der Ventilstange 32 befestigten Schließkörper 33 sowie einem dem Sitz 31 gegenüberliegenden zweiten Ventilsitz 34, der einen Durchlaß 35 zum Auslaß 19 des Gasregelgeräts hin aufweist. Eine Dichtmembran 36 dichtet die Kammer 37 oberhalb des Ventilsitzes 31 gegenüber der diese Membran durchdringenden Ventilstange 32 ab. Über die Drosselstelle 21 ist die Kammer 37 an den Einlaß 22 des Gasregelgeräts angeschlossen. Über einen Kanal 38 steht der Raum zwichen den beiden Ventilsitzen 31 und 34 des Einschaltventils 4 mit der Antriebskammer 20 (vergl. Fig. 1b) in Verbindung. Eine Schließfeder 39 stützt sich einseitig am Gehäuseoberteil 1 ab und liegt andererseits an einem Bund 40 der Ventilstange 32 an. Sie spannt den Schließkörper 33 des Einschaltventils 4 in Schließrichtung des Ventilsitzes 31 vor.Finally, the upper housing part 1 still carries the on-off valve 4 shown in FIGS. 1 and 1 c, consisting of a valve seat 31 and a closing body 33 fastened to the valve rod 32 and a second valve seat 34 opposite the seat 31, which has a passage 35 to the outlet 19 of the Has gas control device. A sealing membrane 36 seals the chamber 37 above the valve seat 31 with respect to the valve rod 32 penetrating this membrane. Via the throttle point 21, the chamber 37 is connected to the inlet 22 of the gas control device. The space between the two valve seats 31 and 34 of the on-off valve 4 is connected to the drive chamber 20 (see FIG. 1b) via a channel 38. A closing spring 39 is supported on one side on the upper housing part 1 and, on the other hand, rests on a collar 40 of the valve rod 32. It pretensions the closing body 33 of the on-off valve 4 in the closing direction of the valve seat 31.

Wird das Einschaltventil 31, 33 geöffnet, so gelangt der Eingangsgasdruck über die Drosselstelle 21 in die Antriebskammer 20. Auf diese Weise wird die Antriebskammer des Regelventils 23 bis 26 mit der erforderlichen Hilfsenergie, nämlich dem Eingangsgasdruck versorgt. Steigt der Gasdruck am Auslaß 19 über einen durch den Betätigungsstift 16 über die Regelfeder 12 vorgegebenen Sollwert an, so verschiebt dieser auf die Unterseite der Regelmembran 11 einwirkende Ausgangsdruck die Membran 11 und hebt den Schließkörper 13 vom Ventilsitz 14 ab. Der Steuerdruck in der Antriebskammer 20 wird über das Ventil 13/14 teilweise zum Auslaß 19 abgebaut. Infolge dieser Verringerung des Steuerdrucks in der Kammer 20 kann die Schließfeder 24 des Regelventils dessen Schließkörper 25 in Richtung Schließstellung verschieben. Er drosselt damit den Gasdurchsatz zwischen Einlaß 22 und Auslaß 19 und verringert folglich den Ausgangsdruck des Gasregelgeräts. Sinkt hingegen der Gasdruck am Auslaß 19 und damit auch die von unten auf die Regelmembran 11 einwirkende Kraft, so baut sich in der Antriebskammer 20 ein höherer Steuerdruck auf, weil das Abblasventil 13/14 durch die Kraft der Regelfeder 12 geschlossen gehalten wird. Dieser erhöhte Steuerdruck in der Kammer 20 bewegt die Antriebsmembran 26 und mit ihr den Schließkörper 25 des Regelventils 23, 25 nach unten. Hierdurch wird das Regelventil weiter geöffnet, und der Auslaßdruck steigt wieder an.If the on-off valve 31, 33 is opened, the input gas pressure reaches the drive chamber 20 via the throttle point 21. In this way, the drive chamber of the control valve 23 to 26 is supplied with the required auxiliary energy, namely the input gas pressure. If the gas pressure at the outlet 19 rises above a desired value specified by the actuating pin 16 via the control spring 12, then this displaces the output pressure acting on the underside of the control membrane 11 and lifts the closing body 13 from the valve seat 14. The control pressure in the drive chamber 20 is partially reduced to the outlet 19 via the valve 13/14. As a result of this reduction in the control pressure in the chamber 20, the closing spring 24 of the control valve can close the closing body 25 thereof move the closed position. It thus throttles the gas throughput between inlet 22 and outlet 19 and consequently reduces the outlet pressure of the gas control device. On the other hand, if the gas pressure at outlet 19 and thus also the force acting on control membrane 11 from below, a higher control pressure builds up in drive chamber 20 because blow-off valve 13/14 is kept closed by the force of control spring 12. This increased control pressure in the chamber 20 moves the drive diaphragm 26 and with it the closing body 25 of the control valve 23, 25 downwards. As a result, the control valve is opened further and the outlet pressure rises again.

Am Anker 7 des Elektromagneten ist mittels zweier Niete 41 eine Blattfeder 42 befestigt, deren freies Ende 43 auf die Ventilstange 32 des Einschaltventils 4 einwirkt. Die Ventilstange 32 ist hierzu mit einem Bund 44 versehen, an dem das mit einem Loch ausgestattete freie Ende 43 der Blattfeder 42 anliegt. Ein im Durchmesser verringertes Endstück 45 der Ventilstange 22 trägt in einer umlaufenden Nut einen Sperring 46. Die Ventilstange 32 steht unter dem Einfluß der Rückstellfeder 39, die sich einerseits gehäusefest an einer Zwischenwand 47 und andererseits am Bund 40 der Ventilstange 32 abstützt. Sie wirkt in Schließrichtung ds Einschaltventils 31, 33.A leaf spring 42 is attached to the armature 7 of the electromagnet by means of two rivets 41, the free end 43 of which acts on the valve rod 32 of the on-off valve 4. For this purpose, the valve rod 32 is provided with a collar 44, against which the free end 43 of the leaf spring 42, which is provided with a hole, bears. A reduced-diameter end piece 45 of the valve rod 22 carries a locking ring 46 in a circumferential groove. The valve rod 32 is under the influence of the return spring 39, which is supported on the one hand fixed to the housing on an intermediate wall 47 and on the other hand on the collar 40 of the valve rod 32. It acts in the closing direction of the switch-on valve 31, 33.

Weiterhin ist am Anker 7 mittels zweier Niete 51 ein relativ steifer Ausleger 52 in Form eines flachen Blechs befestigt, dessen freies Ende 53 ein Loch 54 aufweist, durch welches ein im Durchmesser verringertes Endstück 55 des Betätigungsstifts 16 hindurchragt. Der Stift hat einen Bund 56, gegen den sich im Betrieb das freie Ende 53 des Auslegers 52 legt und damit den Stift 16 mitnimmt. Die Bewegung des Stifts 16 in Achsrichtung ist durch zwei Anschläge in Form von Sprengringen 57 und 58 begrenzt. Der Sprengring 57 wirkt mit einer Schraubhülse 59 zusammen, die in einer Buchse 60 durch Verschrauben verstellbar ist. Die Buchse 60 ihrerseits kann im Gewinde 61 des gehäusefesten Rohrstücks 62 verstellt werden.Furthermore, a relatively rigid arm 52 in the form of a flat sheet is fastened to the armature 7 by means of two rivets 51, the free end 53 of which has a hole 54 through which a reduced-diameter end piece 55 of the actuating pin 16 projects. The pin has a collar 56, against which the free end 53 of the arm 52 lies during operation and thus takes the pin 16 with it. The movement of the pin 16 in the axial direction is limited by two stops in the form of snap rings 57 and 58. The snap ring 57 interacts with a screw sleeve 59 which is adjustable in a bushing 60 by screwing. The bushing 60 in turn can be adjusted in the thread 61 of the tubular piece 62 fixed to the housing.

Der Ausleger 52 ist, wie Fig. 1 b zeigt, mit seinem freien Ende gegenüber der Ebene des Ankers 7 von diesem weg abgebogen und steht unter der Vorspanung einer in ein Gewindeloch des Ankers 7 eingeschraubten Zylinderkopfschraube 63, deren Kopf den Ausleger 52 in Richtung auf den Anker 7 drückt.The cantilever 52, as shown in FIG. 1 b, has its free end bent away from the plane of the armature 7 and stands under the pretensioning of a cylinder head screw 63 screwed into a threaded hole of the armature 7, the head of which rests on the arm 52 in the direction presses the anchor 7.

Der Anker 7 wird, wie Fig. 1c zeigt, von einer Rückstellfeder 64 vom Polstück 65 des Magnetkerns 8 weggedrückt. Zu diesem Zweck stützt sich die Feder 64 einerseits am Gehäuseoberteil 1 ab und trägt andererseits an ihrem freien Ende ein Übertragungsstück 66, in welches eine im Anker 7 verstellbare Justierschraube 67 mit ihrem Stiftansatz 68 hineinragt. Sobald dieser Stiftansatz 68 am Boden 69 der Zylinderbohrung des Übertragungsstücks 66 anliegt, drückt die Rückstellfeder 64 über die Justierschraube 67 den Anker 7 vom Polstück 65 weg. Der Anker steht ferner unter dem Einfluß der durch die Schließfeder 39 vorgespannten Ventilstange 32, welche über den Bund 44 und die Blattfeder 42 den Anker ebenfalls vom Polstück 65 wegzudrücken sucht.As shown in FIG. 1c, the armature 7 is pressed away from the pole piece 65 of the magnetic core 8 by a return spring 64. For this purpose, the spring 64 is supported on the one hand on the upper housing part 1 and on the other hand carries at its free end a transmission piece 66, into which an adjusting screw 67 adjustable in the armature 7 projects with its pin extension 68. As soon as this pin shoulder 68 abuts the bottom 69 of the cylinder bore of the transmission piece 66, the return spring 64 presses the armature 7 away from the pole piece 65 via the adjusting screw 67. The armature is also influenced by the valve rod 32, which is prestressed by the closing spring 39 and which also tries to push the armature away from the pole piece 65 via the collar 44 and the leaf spring 42.

Zur Erläuterung der Arbeitsweise des Gasregelgeräts wird nachfolgend zusätzlich auf Fig. 2 Bezug genommen, in der

  • Fig. 2a schematisch die Lage von Anker 7, Ventilstange 32 und Betätigungsstift 16 bei abgeschaltetem Gasregelgerät und geschlossenem Einschaltventil 4;
  • Fig. 2b die Lage der genannten Teile bei geöffnetem Einschaltventil 4 aber noch unwirksamen Servodruckregler, d. h. bei minimalen Ausgangsdruck des Gasregelgerätes; und schließlich
  • Fig. 2c die Lage der genannten Teile bei einer Einstellung des Servodruckreglers auf einen zwischen minimalem und maximalem Ausgangsdruck liegenden Sollwert, d. h. im Modulationsbereich des Servodruckreglers wiedergibt.
To explain the operation of the gas control device, reference is also made below to FIG. 2, in which
  • 2a shows schematically the position of armature 7, valve rod 32 and actuating pin 16 when the gas control device is switched off and the switch-on valve 4 is closed;
  • 2b shows the position of the parts mentioned when the on-off valve 4 is open but the servo pressure regulator is still ineffective, that is to say at a minimum outlet pressure of the gas control device; and finally
  • 2c shows the position of the parts mentioned when the servo pressure regulator is set to a desired value lying between the minimum and maximum outlet pressure, ie in the modulation range of the servo pressure regulator.

Bei stromloser Erregerspule 9 hält die Schließfeder 39 über den Bund 40 und die Ventilstange 32 das Einschaltventil 31, 33 geschlossen, während die Schließfeder 24 den Schließkörper 25 des Gasregelventils ebenfalls in Schließlage hält. Damit ist der Ausgangsdruck P am Auslaß 19 des Gasregelgeräts gleich Null (vergl. Fig. 3). Unter dem Einfluß der Regelfeder 12 liegt der Betätigungsstift 16 mit seinem Sprengring 58 an der Buchse 60 an. Die Regelfeder 12 hat somit die geringstmögliche Vorspannung.When the excitation coil 9 is de-energized, the closing spring 39 keeps the on-off valve 31, 33 closed via the collar 40 and the valve rod 32, while the closing spring 24 also keeps the closing body 25 of the gas control valve in the closed position. Thus, the outlet pressure P at the outlet 19 of the gas control device is zero (see FIG. 3). Under the influence of the control spring 12, the actuating pin 16 rests on the bush 60 with its snap ring 58. The control spring 12 thus has the lowest possible preload.

Sobald der Strom durch die Erregerspule 9 eingeschaltet wird und eine gewisse Mindestgröße erreicht, kippt der Anker 7 um das Federgelenk 6 und drückt mit der Blattfeder 42 die Ventilstange 32 gegen die Kraft der Rückstellfeder 39 nach unten Damit hebt der Schließkörper 33 vom Ventilsitz 31 ab und Gas kann vom Einlaß 22 des Gasregelgeräts über die Düse 21 durch das Einschaltventil 31, 33 hindurch in die Antriebskammer 20 des Membranantriebs für das Gasregelventil 23 bis 26 einströmen. Zugleich verschließt der Schließkörper 33 den gegenüberliegenden Ventilsitz 34 und sperrt damit die Verbindung der Antriebskammer 20 über den Durchlaß 35 zum Auslaß 19. Sobald in der Kammer 20 ein ausreichender Druck aufgebaut ist, verschiebt die Membran 26 über den Stößel 29 den Schließkörper 25 nach unten und hebt diesen vom Ventilsitz 23 ab. Damit kann Gas vom Einlaß 22 zum Auslaß 19 strömen. Der am Auslaß 19 antstehende Ausgangsdruck gelangt zugleich über den Kanal 18 in die Kammer 17 unterhalb der Regelmembran 11 des Druckreglers. Steigt der Ausgangsdruck über denjenigen Wert an, bei dem die von oben auf die Membran 11 einwirkende Kraft der Regelfeder 12 die vom Gasdruck in der Kammer 17 von unten her auf die Membran 11 ausgeübte Kraft übersteigt, so hebt der Schließkörper 13 vom Ventilsitz 14 ab, und der in der Antriebskammer 20 herrschende Steuerdruck wird durch das Steuerventil 13, 14 hindurch und den Kanal 18 zum Auslaß 19 hin abgebaut. Diese Druckverringerung führt dazu, daß die auf die Antriebsmembran 26 von oben einwirkende Kraft nachläßt und die Schließfeder 24 des Regelventils 23 bis 26 dessen Schließkörper 25 in eine Position mit geringerem Gasdurchlaß verschiebt. Damit nimmt der Druck am Auslaß 19 wieder ab. Es stellt sich ein Kräftegleichgewicht ein, welches den minimalen Gasdruck P am Auslaß 19 bestimmt. Fig. 3 zeigt im Bereich von i = 0 bis i = i, den Bereich, in welchem der Anker 7 zwar bewegt aber das Einschaltventil 4 noch nicht geöffnet ist. Mit dem Strom 11 öffnet das Einschaltventil 4 und läßt in der geschilderten Weise am Ausgang den minimalen Ausgangsdruck Pmin entstehen. Die Höhe dieses Drucks läßt sich mit Hilfe der Buchse 60 verstellen, welche wie erwähnt mit dem Sprengring 58 auf dem Betätigungsstift 16 zusammenwirkt. Bei der geschilderten Betätigung des Einschaltventils, d. h. beim Übergang von der Position der Teile gemäß Fig. 2a auf diejenige nach Fig. 2b liegt einerseits die Justierschraube 67 noch nicht am Übertragungsstück 66 der Rückstellfeder 64 an und andererseits wirkt der Ausleger 52 noch nicht über den Bund 56 auf den Betätigungsstift 16 ein.As soon as the current through the excitation coil 9 is switched on and reaches a certain minimum size, the armature 7 tilts around the spring joint 6 and, with the leaf spring 42, presses the valve rod 32 downward against the force of the return spring 39, so that the closing body 33 lifts off the valve seat 31 and Gas can flow from the inlet 22 of the gas control device via the nozzle 21 through the on-off valve 31, 33 into the drive chamber 20 of the diaphragm drive for the gas control valve 23 to 26. At the same time, the closing body 33 closes the opposite valve seat 34 and thus blocks the connection of the drive chamber 20 via the passage 35 to the outlet 19. As soon as sufficient pressure has built up in the chamber 20, the diaphragm 26 moves the closing body 25 downward via the plunger 29 lifts it off the valve seat 23. This allows gas to flow from inlet 22 to outlet 19. The output pressure at the outlet 19 also reaches the chamber 17 below the control membrane 11 of the pressure regulator via the channel 18. If the output pressure rises above the value at which the force of the control spring 12 acting on the diaphragm 11 from above exceeds the force exerted on the diaphragm 11 by the gas pressure in the chamber 17 from below, the closing body 13 lifts off the valve seat 14, and the control pressure prevailing in the drive chamber 20 is reduced through the control valve 13, 14 and through the channel 18 to the outlet 19. This reduction in pressure leads to the fact that the force acting on the drive diaphragm 26 from above decreases and the closing spring 24 of the control valve 23 to 26 shifts its closing body 25 into a position with less gas passage. So that takes Pressure at outlet 19 again. A balance of forces is established which determines the minimum gas pressure P at the outlet 19. 3 shows in the range from i = 0 to i = i, the range in which the armature 7 moves but the on-off valve 4 is not yet open. With the current 1 1 , the on-off valve 4 opens and, in the manner described, the minimum outlet pressure Pmin can arise at the outlet. The level of this pressure can be adjusted with the aid of the bushing 60, which, as mentioned, interacts with the snap ring 58 on the actuating pin 16. When the switch-on valve is actuated, that is to say during the transition from the position of the parts according to FIG. 2a to that according to FIG. 2b, on the one hand the adjusting screw 67 is not yet in contact with the transfer piece 66 of the return spring 64 and on the other hand the arm 52 does not yet act via the collar 56 on the actuating pin 16.

Erst wenn bei weiterer Erhöhung des Stroms i der Wert i2 erreicht wird, ergibt sich die aus Fig. 2b ersichtliche Position der Geräteteile. Nunmehr liegt die Justierschraube 67 mit ihrem Zylinderansatz 68 am Boden 69 des Übertragungs stücks 66 an. Außerdem hat der Ausleger 52 die Totzone Z bis zum Bund 56 des Betätigungsstifts 16 durchlaufen und wird bei weiterer Stromerhöhung über diesen Bund 56 den Betätigungsstift 16 mitnehmen. Zuvor hat die Blattfeder 42 die Ventilstange 32 so weit verschoben, daß die Rückstellfeder 39 stark zusammengedrückt und gespannt ist und der Schließkörper 33 auf dem gegenüberliegenden Sitz 34 aufsitzt. Damit verschließt der Schließkörper 33 den Kanal 35 zum Auslaß 19 des Gasregelgeräts. Steigt der Strom i über den Wert i2 hinaus weiter an und durchläuft den Modulationsbereich bis zum Wert i3, so wird über den Ausleger 52 der Betätigungsstift 16, wie in Fig. 2c gezeigt, mit nach unten genommen und die Regelfeder 12 zusammengedrückt. Damit erhöht sich die auf die Oberseite der Membran 11 einwirkende, den Sollwert des Ausgangsdrucks des Gasregelgeräts bestimmende Kraft. Je weiter der Betätigungsstift 16 nach unten gedrückt wird, umso größer wird diese Kraft und umso größer muß der in der Kammer 17 wirksame, über den Kanal 18 zugeführte Ausgangsdruck des Gasregelgerätes werden, ehe er über die Membran 11 den Schließkörper 13 des Abblasventils 13, 14 von seinem Sitz 14 abzuheben vermag. Erst wenn der Ausgangsdruck diese erhöhte Kraft der Regelfeder 12 übersteigt und das Ventil 13, 14 öffnet, wird der Steuerdruck in der Antreibskammer 20 über das genannte Ventil und den Kanal 18 zum Auslaß 19 hin abgebaut, so daß die Schließfeder 24 des Regelventils seinen Schließkörper 25 nach oben bewegt und damit den Gasdurchsatz durch das Regelventil und folglich auch den Ausgangsdruck P verringert. Mit zunehmendem Ankerstrom steigt somit im Modulationsbereich zwischen den Stromwerten i2 und is der Ausgangsdruck P an. Diese Situation ist in Fig. 2c wiedergegeben.Only when the value i 2 is reached with a further increase in the current i does the position of the device parts shown in FIG. 2b result. Now the adjusting screw 67 lies with its cylindrical extension 68 on the bottom 69 of the transfer piece 66. In addition, the boom 52 has passed the dead zone Z up to the collar 56 of the actuating pin 16 and will take the actuating pin 16 with it when the current is increased further via this collar 56. Previously, the leaf spring 42 has shifted the valve rod 32 so far that the return spring 39 is strongly compressed and tensioned and the closing body 33 is seated on the opposite seat 34. So that the closing body 33 closes the channel 35 to the outlet 19 of the gas control device. If the current i rises further beyond the value i 2 and passes through the modulation range up to the value i 3 , the actuating pin 16, as shown in FIG. 2 c, is taken down with the cantilever 52 and the control spring 12 is compressed. This increases the force acting on the upper side of the membrane 11 and determining the target value of the outlet pressure of the gas control device. The further the actuating pin 16 is pressed down, the greater this force and the greater the output pressure of the gas control device which is effective in the chamber 17 and is supplied via the channel 18 before it closes the closing body 13 of the blow-off valve 13, 14 via the membrane 11 can take off from its seat 14. Only when the output pressure exceeds this increased force of the control spring 12 and the valve 13, 14 opens, is the control pressure in the drive chamber 20 reduced via the valve and the channel 18 to the outlet 19, so that the closing spring 24 of the control valve has its closing body 25 moves upward and thus reduces the gas throughput through the control valve and consequently also the outlet pressure P. With increasing armature current, the output pressure P thus rises in the modulation range between the current values i 2 and is. This situation is shown in Fig. 2c.

Schließlich wird beim Erreichen des Stromwerts i3 der Betätigungsstößel 16 so weit nach unten verschoben sein, daß der Sprengring 57 an der Schraubhülse 59 anliegt. Damit ist der maximale Ausgangsdruck Pmax erreicht. Dieser läßt sich durch Verstellen der Schraubhülse 59 in der Buchse 60 einstellen. Andererseits kann der minimale Ausgangsdruck Pmin durch Verstellen der Buchse 60 im Gewinde 61 des gehäusefesten Rohrstücks 62 eingestellt werden.Finally, when the current value i 3 is reached, the actuating plunger 16 will be displaced so far down that the snap ring 57 bears against the screw sleeve 59. The maximum outlet pressure Pmax is reached. This can be adjusted by adjusting the screw sleeve 59 in the socket 60. On the other hand, the minimum outlet pressure Pmin can be set by adjusting the bushing 60 in the thread 61 of the tubular piece 62 fixed to the housing.

Sobald, wie in Fig. 2b gezeigt, die Justierschraube 67 am Übertragungsstück 66 anliegt, wird bei der weiteren Bewegung des Ankers 7 auch die Rückstellfeder 64 unter Spannung gesetzt. Sie unterstützt damit die Regelfeder 12, und durch Verstellen der Justierschraube 67 kann die Größe bzw. der Einfluß der von der Feder 64 auf den Anker 7 ausgeübten Rückstellkraft einjustiert werden. Hiermit läßt sich die Steilheit der Druck/Stromkennlinie im Modulationsbereich einstellen. Der Betrag der Totzone Z wird mit der Schraube 63 vorgegeben, die mit ihrem Kopf am Ausleger 52 anliegend, dessen Abspreizung von der Ebene des Ankers 7 bestimmt. Ein nichtmagnetisches Abstandsstück 70 am Anker 7 gewährleistet, daß der Anker unter keinen Umständen am Polstück 65 anliegen und haften kann.As soon as, as shown in FIG. 2b, the adjusting screw 67 bears against the transfer piece 66, the return spring 64 is also put under tension during the further movement of the armature 7. It thus supports the control spring 12, and by adjusting the adjusting screw 67 the size or the influence of the restoring force exerted by the spring 64 on the armature 7 can be adjusted. This enables the slope of the pressure / current characteristic in the modulation range to be set. The amount of the dead zone Z is predetermined by the screw 63, the head of which rests against the arm 52, the spread of which from the plane of the armature 7 is determined. A non-magnetic spacer 70 on the armature 7 ensures that the armature can under no circumstances bear against and adhere to the pole piece 65.

Zum Abschalten des Gasregelgerätes wird der Strom i unterbrochen, wodurch der Anker 7 unter dem Einfluß der Rückstellfeder 64 und der Regelfeder 12 in die aus den Figuren 1 und 2a ersichtliche Ruhestellung zurückgeht und somit auch mit seiner Blattfeder 42 die Ventilstange 32 freigibt, so daß deren Rückstellfeder 39 den Schließkörper 33 in die aus Fig. 2a ersichtliche Schließlage zurückbewegen kann. Damit ist der Druckregler über den Schließkörper 33 vom Eingangsdruck abgeschnitten, und der in der Steuerkammer 20 herrschende Steuerdruck entweicht über den Kanal 35 zum Auslaß hin. Als Folge hiervon bewegt die Schließfeder 24 des Gasregelventils, dessen Schließkörper 25 in Schließlage.To switch off the gas control device, the current i is interrupted, whereby the armature 7, under the influence of the return spring 64 and the control spring 12, returns to the rest position shown in FIGS Return spring 39 can move the closing body 33 back into the closed position shown in FIG. 2a. The pressure regulator is thus cut off from the inlet pressure via the closing body 33, and the control pressure prevailing in the control chamber 20 escapes via the channel 35 to the outlet. As a result, the closing spring 24 of the gas control valve moves the closing body 25 in the closed position.

Ein wesentlicher Vorteil der Erfindung liegt darin, daß mit einem einzigen Magnetantrieb und unter Verwendung herkömmlicher Federn und sonstiger Bauteile sowohl die Betätigung des Einschaltmagnetventils als auch die Steuerung des Sollwerts des Servodruckreglers durch einen elektrischen Strom erreicht wird. Dabei kann der Sollwert kontinuierlich zwischen einem Minimalwert und einem Maximalwert des Geräteausgangsdrucks verstellt werden. Sowohl der minimale als auch der maximale Druck lassen sich getrennt einstellen, und auch die Steilheit der Regelkennlinie im Modulationsbereich ist veränderbar. Man erhält somit ein vielseitiges und leicht an unterschiedliche Einsatzbedingungen anpaßbares Gasregelgerät.An important advantage of the invention is that with a single magnetic drive and using conventional springs and other components, both the actuation of the switch-on solenoid valve and the control of the setpoint of the servo pressure regulator is achieved by an electrical current. The setpoint can be continuously adjusted between a minimum value and a maximum value of the device outlet pressure. Both the minimum and the maximum pressure can be set separately, and the slope of the control characteristic in the modulation range can also be changed. The result is a versatile gas control device that can be easily adapted to different operating conditions.

Claims (9)

1. Gas control apparatus comprising a main valve (23-25) controlled by means of a servopressure regulator (3), with the closure member (25) of the main valve being biased in closing direction by means of a spring (24), whereat
a) a diaphragm (11) of the servopressure regulator (3) carries the closure member (13) of a vent valve (13, 14) which connects a control pressure chamber (20) of the main valve (23 to 25) to the gas outlet (19) of the control apparatus;
b) a control spring (12) determining the set point of the gas pressure acts upon said diaphragm (11) with the abutment (15) for said control spring which is remote from the diaphragm being adjustable;
c) a switch-on valve (31, 33) biased by a valve closure spring (29) is provided within the gas path between the inlet (22) of the gas control apparatus and the pressure regulator (3);

characterized in that
d) the diaphragm (11) of the servopressure regulator (3) is exposed to the gas pressure to be controlled;
e) a solenoid (2) consisting of a coil (9), a magnetic core (8) and a tiltable armature (7) acts with its armature (7) at the one side upon the valve rod (32) of the switch-on valve (31, 33) and at the other side upon a pin (16) which carries the abutment (15) of the control spring (12) which is remote from said diaphragm; and
f) an armature return spring (64) which with its one end abuts against the housing engages the armature (7) not earlier after said armature has travelled through an idle stroke sufficient for opening the switch-on valve (31, 33).
2. Gas control apparatus according to claim 1, characterized in that on the one side a spring blade engaging with its free end (43) the valve rod (32) and on the other side a cantilever (52) essentially extending in parallel to said spring blade (42) are fixed with one end to the armature (7).
3. Gas control apparatus according claim 2, characterized in that the relative position of the cantilever (52) and the armature (7) with respect to each other can be adjusted along the operating direction of the pin (16).
4. Gas control apparatus according to claim 3, characterized in that the cantilever (52) is a relatively stiff blade which between its connecting portion (51) at the armature (7) and its free end (53) is bent away from said armature, and whereat an adjusting screw (63) screwed into the armature (7) projects through a hole within said cantilever such that the cantilever (52) by means of the head of the adjusting screw (63) is spring biased in the direction to the armature (7).
5. Gas control apparatus according to one of the claims 1 to 4, characterized in that the armature return spring (64) carries at its free end a sleeve shaped transmission member (66) into which an adjusting screw (67) projects with a pin shaped projection (68) so far that it engages the bottom of the transmission member (66) not before opening the switch-on valve (31, 33) and then acts upon the armature return spring (64), and whereat said adjusting screw (64) is adjustable within the armature (7).
6. Gas control apparatus according to one of the claims 1 to 5, characterized in that an idle stroke (Z), adjustable by means of the adjusting screw (63) is provided between the cantilever (52) and the operating pin (16) of the pressure regulator with said idle stroke having such a length that the adjustment of the operating pin (16) by means of the cantilever (52) and the influence of the armature return spring (64) onto the armature (7) start simultaneously.
7. Gas control apparatus according to one of the claims 1 to 6, characterized in that two abutments (57, 58) are provided at the operating pin (16) with each abutment cooperating with a counter abutment (59,61) which for adjusting the minimum and the maximum outlet pressure of the gas control apparatus can be positioned with respect to the housing.
8. Gas control apparatus according to claim 7, characterized in that both counter abutments (59, 61) are formed by a screw bushing which can be adjusted within a tube like member (62).
9. Gas control apparatus according to one of the claims 1 to 8, characterized in that the armature return spring (64) and/or the control spring (12) are provided in the form of a coil spring.
EP86118069A 1986-12-24 1986-12-24 Gas regulation apparatus having a servo pressure regulator Expired EP0272348B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP86118069A EP0272348B1 (en) 1986-12-24 1986-12-24 Gas regulation apparatus having a servo pressure regulator
DE8686118069T DE3666289D1 (en) 1986-12-24 1986-12-24 Gas regulation apparatus having a servo pressure regulator
US07/116,998 US4785846A (en) 1986-12-24 1987-11-05 Gas control apparatus with a pressure regulator
JP62292931A JPS63163516A (en) 1986-12-24 1987-11-20 Gas controller with servo pressure regulator
DK674687A DK674687A (en) 1986-12-24 1987-12-21 GAS REGULATOR WITH SERVO PRESSURE CONTROLLER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86118069A EP0272348B1 (en) 1986-12-24 1986-12-24 Gas regulation apparatus having a servo pressure regulator

Publications (2)

Publication Number Publication Date
EP0272348A1 EP0272348A1 (en) 1988-06-29
EP0272348B1 true EP0272348B1 (en) 1989-10-11

Family

ID=8195675

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86118069A Expired EP0272348B1 (en) 1986-12-24 1986-12-24 Gas regulation apparatus having a servo pressure regulator

Country Status (5)

Country Link
US (1) US4785846A (en)
EP (1) EP0272348B1 (en)
JP (1) JPS63163516A (en)
DE (1) DE3666289D1 (en)
DK (1) DK674687A (en)

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DE4019757A1 (en) * 1990-06-21 1992-01-02 Honeywell Bv MEMBRANE CONTROLLED GAS PRESSURE REGULATOR
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DE4140774C2 (en) * 1990-12-10 1996-11-21 Vaillant Joh Gmbh & Co Pressure regulator
DE4111945A1 (en) * 1991-04-12 1992-10-15 Honeywell Bv ABOUT A SUBMERSIBLE DRIVE CONTROLLED SERVO PRESSURE REGULATOR
AT396828B (en) * 1991-07-22 1993-12-27 Vaillant Gmbh SERVO GAS PRESSURE REGULATOR
DE19515286C2 (en) * 1995-04-26 1998-07-02 Honeywell Bv Pressure regulator for generating a regulated control pressure for a diaphragm-controlled gas valve
EP0800039B1 (en) * 1996-04-02 2001-03-21 Sit la Precisa S.p.a. A valve unit for controlling the delivery pressure of a gas
DE29618080U1 (en) * 1996-10-18 1996-12-05 Festo Kg, 73734 Esslingen Pressure regulator
DE19722600C2 (en) * 1997-05-30 2002-06-27 Dungs Karl Gmbh & Co servo controller
AU2476900A (en) * 1999-10-27 2001-05-08 Emerson Electric Co. Gas valve having a regulator with independent minimum and maximum adjustments
CN100498258C (en) * 2005-08-02 2009-06-10 佛山市顺德区万和集团有限公司 Intelligent wind pressure detecting device and its detecting method
US20100282325A1 (en) * 2007-07-23 2010-11-11 Clara Appliances Pty Ltd Gas Flow Control System
US10502340B2 (en) 2015-08-17 2019-12-10 Honeywell International Inc. System for a valve setup
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ITUA20163560A1 (en) * 2016-05-18 2017-11-18 Sit Spa Piloting method of a fuel gas flow regulation valve to a burner, in particular for condensing boilers with high power modulation
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Also Published As

Publication number Publication date
DK674687A (en) 1988-06-25
US4785846A (en) 1988-11-22
EP0272348A1 (en) 1988-06-29
DE3666289D1 (en) 1989-11-16
DK674687D0 (en) 1987-12-21
JPS63163516A (en) 1988-07-07

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