EP0048486B1 - Régulateur de pression à membrane - Google Patents

Régulateur de pression à membrane Download PDF

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Publication number
EP0048486B1
EP0048486B1 EP19810107514 EP81107514A EP0048486B1 EP 0048486 B1 EP0048486 B1 EP 0048486B1 EP 19810107514 EP19810107514 EP 19810107514 EP 81107514 A EP81107514 A EP 81107514A EP 0048486 B1 EP0048486 B1 EP 0048486B1
Authority
EP
European Patent Office
Prior art keywords
spring
adjusting
pressure regulator
transmission lever
pressure
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
EP19810107514
Other languages
German (de)
English (en)
Other versions
EP0048486A1 (fr
Inventor
Hendrikus Berkhof
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
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Filing date
Publication date
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Application filed by Honeywell BV filed Critical Honeywell BV
Publication of EP0048486A1 publication Critical patent/EP0048486A1/fr
Application granted granted Critical
Publication of EP0048486B1 publication Critical patent/EP0048486B1/fr
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
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/06—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using bellows; using diaphragms
    • F23N5/067—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using bellows; using diaphragms using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/007—Regulating fuel supply using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • 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

Definitions

  • the invention relates to a membrane pressure regulator according to the preamble of claim 1.
  • a modulating pressure regulator is known from DE-PS 2 646 310.
  • the diaphragm is supported by an auxiliary spring on a first spring determining the minimum pressure acting on the diaphragm, while a second spring determining the maximum pressure acting on the diaphragm is supported on the one hand on a counterpart fixed to the housing and on the other hand on a sleeve serving as a driving stop for the transmission lever acts, which carries a pin opposite a driving surface of the first spring.
  • a second transmission lever with a is in a pressure regulator known from EP-A-13 993 in the course of the power transmission from a temperature sensor to the diaphragm of the pressure regulator adjustable slider provided.
  • a pressure regulator known from EP-A-13 993 in the course of the power transmission from a temperature sensor to the diaphragm of the pressure regulator adjustable slider provided.
  • the degree of influence of the force generated by the temperature sensor on the adjusting spring can be changed.
  • this requires an intervention in the interior of the housing, so that this option is essentially only used when the pressure regulator is set for the first time, for example to a specific type of gas.
  • the object of the invention is to provide a possibility for simple adjustment of the control characteristic without intervention in the interior of the housing, so that such an adjustment can also be made after assembling the diaphragm pressure regulator and, if necessary, even after installing the diaphragm pressure regulator in a gas control unit.
  • This is achieved by the invention characterized in claim 1. It is known to replace the spring acting on the diaphragm in pressure regulators if the pressure regulator is to be changed over to a different pressure range. However, the invention leads to a solution in which the maximum pressure, that is to say the pressure range, is predetermined by the aforementioned setting spring and thus remains unaffected when the auxiliary spring is replaced. If you replace the auxiliary spring with another one with a different spring strength, only the slope of the spring characteristic changes in the modulation range, but not the maximum or minimum output pressure of the pressure regulator.
  • the invention aims to have a reference variable, for example the output manipulated variable of a temperature sensor, act on the pressure regulator in such a way that this measured reference variable determines the operating point of the pressure regulator on the inclined part of its characteristic curve in the modulation range.
  • a reference variable for example the output manipulated variable of a temperature sensor
  • Fig. 1 the main valve 1 of a gas control device shown only partially is controlled by the control pressure generated by a membrane pressure regulator 30.
  • a valve seat 5 is arranged, which can be opened more or less with the aid of a closing body 6.
  • a membrane 7 separates the outlet chamber 4 from a control pressure chamber 8. The pressure in the chamber 8 works via the membrane 7 against the force of a closing spring 9, which tries to move the closing body 6 in the closing direction of the main valve 5, 6.
  • the inlet chamber 3 is also connected via a throttle 11 to the inlet chamber 12 of a switch-on solenoid valve 13, which is shown in FIG. 1 in the switch-on state. It consists of a magnetic core 14 with excitation winding 15 and an armature 16, which carries a throttle body 17.
  • a switch-on solenoid valve 13 In the switch-on position of the switch-on solenoid valve 13 shown, its input chamber 12 is connected on the one hand via the channel 18 to the control pressure chamber 8 of the main valve 1 and on the other hand via a channel 19 to the inlet side 20 of the diaphragm pressure regulator 30.
  • a channel 21 connects the chamber 31 of the diaphragm pressure regulator 30 with the outlet chamber 4 of the main valve.
  • the switch-on solenoid valve 13 If the switch-on solenoid valve 13 is different from the illustration shown in FIG. 1 in the off position, the connection between the chambers 12 and 8 is blocked by the closing body 17, while at the same time the input chamber 20 of the pressure regulator 30 on the one hand via the channel 22 with the outlet chamber 4 of the main valve 1 and on the other hand via the channel 18 with the tax pressure chamber 8 of the main valve is connected.
  • the switch-on solenoid valve 13 responds as soon as the supply of heat is required, that is to say, for example, the temperature in a room to be heated or water heater drops below a predetermined setpoint. To generate the required heat, a burner is connected to the outlet 23 of the main valve 1.
  • the inlet chamber 20 of the diaphragm pressure regulator 30 opens into a valve seat 32 which can be more or less closed by means of a throttle body 33.
  • the throttle body 33 is fastened via a diaphragm plate 34 and a throttle body carrier 35 to a diaphragm 36 delimiting the chamber 31 on the side facing away from the valve seat 32, the diaphragm 37 with its circumferential bead 37 between the lower housing part 38 of the pressure regulator 30 and a disk 39 having the valve seat 32 is clamped pressure-tight.
  • a cover 40 is placed on the base plate 38 of the pressure regulator, which cover also serves as a support for a thermomechanical converter 41.
  • the throttle body carrier 35 and thus the diaphragm 36 are under the influence of two adjusting springs 42 and 43.
  • the last-mentioned adjusting spring 43 rests on a shoulder 44 of the throttle body carrier 35 and is clamped with the other end of the housing, for example with the aid of a rivet 45 on a housing shoulder Base plate 38 attached.
  • An adjusting screw 46 adjustable in the cover 40 acts on this adjusting spring 43, with the aid of which the minimum outlet pressure of the pressure regulator can be specified.
  • the other adjusting spring 42 which is also designed as a leaf spring. It is carried by an intermediate lever 48 which is pivotable about an axis 49. This is mounted in two tabs 50 of a transmission lever 51, which in turn is pivotable about an axis 52 fixed to the housing.
  • the transmission lever 51 is under the influence of a helical spring 53 which presses it in a counterclockwise direction and which is supported on the base plate 38 on one side of the housing.
  • the free end 54 of the transmission lever 51 is bent at right angles and serves as a stop for limiting the rotation of the intermediate lever 48 in the clockwise direction.
  • an adjusting screw 55 can be adjusted in a threaded bore 56 of the housing cover 40 in a corresponding manner for the adjusting spring 42.
  • An auxiliary spring 58 is connected between the adjusting screw 55 and a spring plate 57 resting on the adjusting spring 42, the pretension of which can be adjusted with the help of the adjusting screw 55 and which can be easily replaced if necessary.
  • the stiffness of this auxiliary spring 58 determines the steepness of the pressure regulator characteristic in the modulation range.
  • the thermoelectric converter 41 converts the temperature changes measured by an expansion temperature sensor 61 into a mechanical adjustment of the pin 62.
  • a membrane capsule 63 is used, which is supported on the one hand on an adjusting body 64 and on the other hand can expand against the force of a spring 65.
  • the spring plate 66 bears on the membrane capsule 63, to which the output pin 67 of the converter is fastened. It acts on a lever 68 mounted on the housing, which in turn carries the pin 62.
  • a leaf spring 69 is also attached to the lever 68 and actuates the electrical switch 70 when a predetermined temperature limit value is exceeded.
  • the adjusting body 64 can be adjusted with the aid of a rotary knob 71 and the support point for the membrane capsule 63 can thus be changed in a known manner. This sets the temperature setpoint.
  • the pressure regulator 30 is switched on and off with the aid of the switch-on solenoid valve 13, in that this either enables or blocks the gas supply to the pressure regulator.
  • Another possibility for locking the pressure regulator is to mechanically pull the throttle body 33 away from the seat 32 and in this way block the pressure regulator.
  • an electromagnet acting on the throttle body carrier 35 with the diaphragm 36 and the throttle body 33 in alignment can be placed on the cover 40, which, when switched on, releases the pressure regulator and blocks the movement of the throttle body carrier 35 in the switched-off state.
  • a boiler supplies heating water for radiators installed in a room and the boiler is heated by a gas burner. This burner is connected to the outlet 23.
  • the expansion temperature sensor 61 measures the temperature of the boiler water.
  • the contact of a room thermostat is connected in series, which closes as soon as the Room measured temperature falls below a predetermined setpoint.
  • this series connection namely the normally open contact of the switch 70, which opens as soon as the boiler water temperature measured by the temperature sensor 61 exceeds a predetermined maximum limit value.
  • the closing solenoid valve is de-energized and thus the gas supply to the burner is interrupted.
  • Gas should only flow to the burner for as long as the room temperature is below the setpoint, i.e. heat must be supplied to the room, and the boiler water temperature (sensor 61) is not sufficient to accommodate the radiators in the room to supply enough hot water, so it is necessary to add heat to the boiler water. If, on the other hand, the boiler water is hot enough to supply sufficient heat to the room or if no heat is required to the room at all, then the burner should not be able to be supplied with gas.
  • the solenoid valve 13 responds and by means of the throttle body 17 releases the gas supply on the one hand via the channel 32 to the pressure regulator 30 and on the other hand via the channel 18 to the control chamber 8 of the main valve 1.
  • the pressure regulator 30 determines the pressure prevailing in the chamber 12 and in the above-mentioned channels as well as in the control chamber 8 and thus the degree of opening of the main valve 5, 6.
  • the boiler water temperature measured by the sensor 61 is low, so that the membrane capsule 63 is largely compressed.
  • the pin 62 does not exert any significant force on the transmission lever 51; Rather, this is pivoted as far as possible counterclockwise by the spring 53.
  • the central part of the adjusting spring 42 is supported on the spring plate 57 and thus on the adjusting screw 55 via the auxiliary spring 58. If the spring 53 presses the bearing 49 and thus the left lever arm of the adjusting spring 42 upward, the right lever arm of the adjusting spring 42 becomes upward, the right lever arm and thus the free end 73 of the adjusting spring 42 in contact with the end 47 of the throttle body carrier 35 Direction of arrow 72 pressed with the greatest possible force in the direction of the valve seat 32.
  • the closing body 33 closes the valve seat 32 and thus the connection between the channel 19 and the channel 21, so that the control pressure prevailing in the chamber 12 cannot be reduced via the channels mentioned to the outlet chamber 4 of the main valve, but rather in full via the channel 18 is present in the control pressure chamber 8 and presses the diaphragm 7 together with the throttle body 6 against the force of the spring 9 into the fully open position of the main valve 5, 6.
  • the level of this maximum pressure is determined by the position of the adjusting screw 55. The further it is screwed in towards the interior of the housing and thus the auxiliary spring 58 is pressed downward, the stronger the force in the direction of arrow 72, ie. H. the higher the control pressure that the inlet pressure must exceed before the pressure regulator takes effect and a part of the inlet pressure is reduced towards the outlet.
  • the start of the modulation range M is thus reached at point A of the operating characteristic.
  • the force of the setting spring 42 acting on the end 47 of the throttle body carrier 35 is determined primarily by the spring force of the auxiliary spring 58.
  • the harder this spring is, the steeper the characteristic curve in the modulation range M.
  • the curve part A'B shown in broken lines corresponds to the use of a harder auxiliary spring 58 and the curve part A "B a softer auxiliary spring 58 than in the case AB the auxiliary spring 58 is completely relaxed at point B and no longer exerts any force on the adjusting spring 42. This thus becomes ineffective.
  • the closing body 33 opens the blow-off channel 20, 21 towards the outlet, so that the control pressure in the control chamber 8 drops and the main valve 5, 6 is moved by the closing spring 9 in the direction of the closed position
  • the characteristic curve is therefore the minimum outlet pressure of the pressure regulator and thus also the gas control unit, even if the Te temperature rises further, this minimum outlet pressure is maintained up to point C. Only when the leaf spring 69, which is attached to the lever 68, actuates the switch 70 and thus the circuit for the switch-on solenoid valve 13 when the lever 68 pivots counterclockwise opens, the latter is de-energized and its closing body 17 blocks the gas supply to the pressure regulator 30. At the same time, the control pressure chamber 8 is depressurized via the channels 18 and 21 to the outlet. The main valve 5, 6 closes.
  • the switch 70 closes, the switch-on solenoid valve 13 responds again, and the burner is switched on again with a minimal gas throughput. If the temperature continues to drop despite this gas supply, the spring 53 pivots the transmission lever 51 counterclockwise until the adjusting spring 42 again lies against the end 47 of the throttle body support 35 and the auxiliary spring 58 becomes effective.
  • the outlet pressure P is set to a value in the modulation range M between points A and B of the characteristic curve.
  • the room temperature sensor detects an increase in the room temperature above the setpoint, its make contact opens and consequently switches off the solenoid valve 13. The gas supply to the burner is thus blocked in the same way as was explained above in connection with the opening of the overtemperature switch 70.
  • FIG. 3 shows an embodiment of the diaphragm pressure regulator in which the transmission lever 151 and the intermediate lever 148 have interchanged their spatial position with respect to the arrangement according to FIG. 1.
  • the transmission lever 151 can be pivoted about the axis 152 which is fixed to the housing and, as the force of the command variable 81 increases, it is pivoted counterclockwise against the force of the return spring 53.
  • the pivot axis 49 for the intermediate lever 148 is mounted in two tabs 50 of the transmission lever 151. Its bearing point is here on the side of the bearing point 152 of the transmission lever 151 facing away from the throttle body carrier 35.
  • the mode of operation of the arrangement according to FIG. 3 is the same as that previously described with reference to FIG. 1.
  • the stop 54 in turn limits the pivoting of the intermediate lever 148 in the clockwise direction.

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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)
  • Feeding And Controlling Fuel (AREA)

Claims (8)

1. Régulateur de pression à membrane, en particulier pour la régulation de la pression de commande d'un appareil de régulation de gaz, comportant une membrane (36) portant l'obturateur (33) d'une soupape (32, 33), et un ressort de réglage (42), agissant sur cet obturateur dans le sens de sa fermeture et déterminant la pression maximale de sortie du régulateur, qui s'appuie pour le réglage de sa tension initiale sur une vis de réglage (55) vissée dans le boîtier (40) du régulateur, caractérisé par le fait qu'entre le ressort de réglage (42) et la vis de réglage (55) est placé un ressort auxiliaire (58) qui peut être remplacé de l'extérieur du boîtier (40) du régulateur par un autre ayant une caractéristique de charge différente.
2. Régulateur de pression selon la revendication 1, caractérisé par le fait qu'il est prévu un deucième ressort de réglage (43) qui agit également sur l'obturateur (33) dans le sens de sa fermeture et qui détermine la pression minimale de sortie du régulateur, et que les deux ressorts de réglage (42, 43) sont des ressorts lames.
3. Régulateur de pression selon la revendication 2, caractérisé par le fait que le ressort auxiliaire interchangeable (58) est logé dans un trou taraudé (56) du couvercle (40) du boîtier obturé vers l'extérieur par la vis de réglage (55) et est accessible depuis le même côté du boîtier que le moyen (46) de réglage du deucième ressort de réglage (43).
4. Régulateur de pression selon l'une des revendications 1 à 3, comportant un levier de transmission par l'intermédiaire duquel la force d'une grandeur de conduite agit sur le ressort de réglage, caractérisé par le fait que les moyens (55, 46) de réglage des deux ressorts de réglage (42, 43) et le levier de transmission (51) sont placés en dehors de l'alignement du siège de soupape (32) et de l'obturateur (33).
5. Régulateur de pression selon la revendication 4, caractérisé par le fait que:
a) le levier de transmission (51, 151), monté à une extrémité sur un axe (52, 152) solidaire du boîtier, porte à proximité de son extrémité libre un support (50) pour un axe (49),
b) sur l'axe (49) est monté un levier intermédiaire (48, 148) qui porte le premier ressort de réglage (42),
c) le levier intermédiaire (48, 148) s'appuie à son extrémité située du côté du moyen (55) de réglage du premier ressort de réglage
(42) sur une butée (54) du levier de transmission (51,151), et
d) le levier de transmission (51, 151) est soumis à l'action d'un ressort (53) qui s'appuie d'un côté sur le boîtier et agit en sens contraire de la force réglante (62, 81) de la grandeur de conduite.
6. Régulateur de pression selon la revendication 5, caractérisé par le fait que le ressort auxiliaire interchangeable (58) sur lequel agit la vis de réglage (55) agit sur le premier ressort de réglage (42) entre la butée (54) et l'obturateur (33).
7. Régulateur de pression selon l'une des revendications 5 et 6, caractérisé par le fait que l'extrémité du levier de transmission (51) qui porte l'axe (49) sur lequel est monté le levier intermédiaire (48), s'étend en direction de l'obturateur (33), à partir de l'ace (52) solidaire du boîtier sur lequel est monté le levier de transmission (51), et la force réglante (62) de la grandeur de conduite agit sur le levier de transmission (51) entre les deux axes (49, 52).
8. Régulateur de pression selon l'une des revendications 5 et 6, caractérisé par le fait que l'extrémité du levier de transmission (151) qui porte l'axe (49) sur lequel est monté le levier intermédiaire (148) en direction opposée à l'obturateur (33) à partir de l'axe (152) solidaire du boîtier sur lequel est monté le levier de transmission (151), s'étend et la force réglante (81) de la grandeur de conduite agit sur le côté du levier de transmission (151) opposé à l'axe (49) sur lequel est monté le levier intermédiaire (148) (figure 3).
EP19810107514 1980-09-24 1981-09-22 Régulateur de pression à membrane Expired EP0048486B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3035925 1980-09-24
DE19803035925 DE3035925A1 (de) 1980-09-24 1980-09-24 Membrandruckregler

Publications (2)

Publication Number Publication Date
EP0048486A1 EP0048486A1 (fr) 1982-03-31
EP0048486B1 true EP0048486B1 (fr) 1983-11-30

Family

ID=6112700

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810107514 Expired EP0048486B1 (fr) 1980-09-24 1981-09-22 Régulateur de pression à membrane

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US (1) US4406400A (fr)
EP (1) EP0048486B1 (fr)
DE (2) DE3035925A1 (fr)

Families Citing this family (12)

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DE3666289D1 (en) * 1986-12-24 1989-11-16 Honeywell Bv Gas regulation apparatus having a servo pressure regulator
US5040563A (en) * 1990-07-09 1991-08-20 The Devilbiss Company Adjustable air pressure valve
DE19515286C2 (de) * 1995-04-26 1998-07-02 Honeywell Bv Druckregler zum Erzeugen eines geregelten Steuerdrucks für ein membrangesteuertes Gasventil
DE69612184T2 (de) * 1996-04-02 2001-09-06 Sit La Precisa S.P.A., Padua/Padova Eine Ventileinheit zur Regelung des Abgabedruckes eines Gases
US5944257A (en) * 1996-11-15 1999-08-31 Honeywell Inc. Bulb-operated modulating gas valve with minimum bypass
US6786225B1 (en) 2000-11-15 2004-09-07 Emerson Electric Co. Three-stage relay control
US7341072B2 (en) * 2003-05-02 2008-03-11 Carleton Technologies, Inc. Oxygen supply system having a central flow control unit
CA2833022C (fr) * 2004-10-14 2015-04-21 John Vancak Ensembles d'appareil de chauffage a tube radiant
JP2012097940A (ja) * 2010-10-30 2012-05-24 Noritz Corp 燃料供給用ヘッドおよびこれを備えた燃焼装置
US10503181B2 (en) 2016-01-13 2019-12-10 Honeywell International Inc. Pressure regulator
US11105415B2 (en) * 2018-07-03 2021-08-31 Transgo, Llc Methods and systems for improving the operation of transmissions for motor vehicles
TWI745063B (zh) * 2020-08-31 2021-11-01 七宇實業股份有限公司 以低動力控制大流量之氣體安全裝置

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US2381799A (en) * 1943-09-20 1945-08-07 Honeywell Regulator Co Diaphragm valve
US2611542A (en) * 1948-08-23 1952-09-23 Honeywell Regulator Co Fluid-flow control device and system
US3235180A (en) * 1963-01-18 1966-02-15 Robertshaw Controls Co Combination pressure and temperature control
US3307785A (en) * 1965-07-22 1967-03-07 Honeywell Inc On-off and modulating condition control valve
DE1550164A1 (de) * 1966-01-06 1969-09-11 Controls Company Fluessigkeitsregelventil
US3366140A (en) * 1966-03-03 1968-01-30 Honeywell Inc Control apparatus including bimetal actuator with temperature compensator
DE2646310C2 (de) * 1976-10-14 1978-12-07 Honeywell B.V., Amsterdam Druckregler
US4182488A (en) * 1977-12-30 1980-01-08 Honeywell Inc. Pressure regulator
DE2903201A1 (de) * 1979-01-27 1980-08-07 Honeywell Bv Druckregler
DE2903203A1 (de) * 1979-01-27 1980-08-07 Honeywell Bv Druckregler

Also Published As

Publication number Publication date
US4406400A (en) 1983-09-27
EP0048486A1 (fr) 1982-03-31
DE3035925A1 (de) 1982-05-13
DE3161557D1 (en) 1984-01-05

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