EP0035147B1 - Régulateur de pression à gaz - Google Patents

Régulateur de pression à gaz Download PDF

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Publication number
EP0035147B1
EP0035147B1 EP81101003A EP81101003A EP0035147B1 EP 0035147 B1 EP0035147 B1 EP 0035147B1 EP 81101003 A EP81101003 A EP 81101003A EP 81101003 A EP81101003 A EP 81101003A EP 0035147 B1 EP0035147 B1 EP 0035147B1
Authority
EP
European Patent Office
Prior art keywords
valve
pressure
chamber
diaphragm
gas 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
EP81101003A
Other languages
German (de)
English (en)
Other versions
EP0035147A1 (fr
Inventor
Hans Meier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vaillant BV
Original Assignee
Vaillant Austria GmbH
Cofrabel Nv
Joh Vaillant GmbH and Co
Vaillant GmbH
Vaillant SARL
Vaillant Ltd
SCHONEWELLE 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 Vaillant Austria GmbH, Cofrabel Nv, Joh Vaillant GmbH and Co, Vaillant GmbH, Vaillant SARL, Vaillant Ltd, SCHONEWELLE BV filed Critical Vaillant Austria GmbH
Priority to AT81101003T priority Critical patent/ATE8700T1/de
Publication of EP0035147A1 publication Critical patent/EP0035147A1/fr
Application granted granted Critical
Publication of EP0035147B1 publication Critical patent/EP0035147B1/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
    • F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
    • F23N5/188—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel 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
    • F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
    • F23N1/087—Regulating fuel supply conjointly with another medium, e.g. boiler water using mechanical 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
    • F23N2235/18—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

Definitions

  • the present patent application relates to a gas pressure regulator for a circulating water heater with a water heater according to the preamble of claim 1 according to the earlier patent application 801005646, with the publication no. EP-A-0016326 from October 1, 1980.
  • control diaphragm is preloaded by a spring that can be adjusted by a screw, and consequently the maximum pressure at the outlet chamber of the gas pressure regulator can be specified by adjusting the screw.
  • the flow switch detects the flow of water in the tap water path and automatically switches over.
  • a circulating water heater 1 is connected to a flow line 2, which leads to a consumer 3, from which in turn a return line 4 leads to the circulating water heater.
  • the consumer 3 here consists of a plurality of radiators connected in parallel and / or in series, which are regularly equipped with thermostatic valves (not shown) at their inlet.
  • the flow line 2 starts from a three-way switch valve 5, one outlet of which is connected to the flow line 2 and the other outlet to the water heater feed line 6, which leads to a water heater 7, of which a water heater return line 8 goes off, which merges at a union point 9 with the return line 4 provided with a pump to lead to a heat exchanger 11 charged with combustion gases from a burner 10, to which a line 12 connects, which leads to the three-way switch valve 5 .
  • the burner 10 is a gas burner which is connected to a gas pressure regulator 14 via a gas line 13.
  • the membrane switch 16 is connected via a pressure transmission line 18 to a flow meter 19 which lies in the course of a tap line 20 for tap water which leads via a pipe coil 21 inside the water heater 7 and is controlled at its end by a tap valve 22
  • This gas pressure regulator has a housing 30 which has an inlet chamber 31 and an outlet chamber 32 in the course of the gas line 13. Between the inlet and outlet chamber there is a valve seat 33, which can be closed in the idle state by a valve body 35 articulated by a rod 34, which is under the restoring force of a compression spring 36, the actuating rod 34 being connected to a diaphragm plate 37 of an actuating membrane 38, which is clamped pressure-tight in the housing 30 at its edge in the region of the outlet chamber 32.
  • the inlet and outlet chamber are thus separated from one another in the idle state via the closed valve 33, 35.
  • the control membrane divides a further chamber 39, from which a channel 40 leads to a valve center space 41.
  • the valve center space 41 is delimited by two valve seats 42 and 43 and an outflow opening 44.
  • a channel 45 leads from the valve seat 43 to a branching point 46, from which a further channel 47 leads to the outlet chamber 32.
  • Another channel 48 leads to a membrane chamber 49, which is connected to the outflow opening 44 via a line 50, in which a valve seat 51 is provided.
  • a valve body 52 corresponds to the valve seat 51, which can be moved and controlled in the open position by a compression spring 53 which is supported with respect to the housing 30.
  • the valve body 52 is attached to a first control membrane 54, which is under the action of a compression spring 55, which is adjustable by an adjusting screw 56, which in turn is guided gas-tight in a thread in the housing 30.
  • a further diaphragm chamber 57 is formed, which is connected to a further diaphragm chamber 59 via an opening 58.
  • This membrane chamber 59 is delimited, apart from the housing 30, by a second control membrane 60, which on the Membrane chamber 59 opposite side forms a further membrane chamber 61, in which a compression spring 62 is mounted, which is supported against a spring plate 63.
  • the spring plate 63 is rigidly connected to the actuating rod 15, the actuating rod carries a stop piece 64 which is elastically supported against the housing 30 via a compression spring 65.
  • the stop piece 64 carries an adjusting screw 66 acting as a stop, the tip of which can move against the upper side of the housing 30 with a maximum travel, the maximum travel away from the housing 30 limits the tip of a further adjustment screw 67, which is screwed into an extension 68 of the housing 30 .
  • the actuating rod 15 passes through the wall of the water switch 16 and is connected to a membrane plate 69 which is supported by a membrane 70.
  • Membrane chambers 71 and 72 are formed on both sides of the membrane and are connected to the flow meter 19 via the line 18.
  • the flow meter 19 is known as a venturi and is located in the tap water path 20.
  • the membrane chamber 61 is connected to the atmosphere via a throttle bore 73.
  • a valve body 74 is connected to the second control membrane 60, which corresponds to a valve seat 75 arranged in the housing 30.
  • the valve seat 75 is connected to the membrane chamber 59 via a line 76.
  • the valve body 74 is under the action of a compression spring 77, which is supported with respect to the housing 30 and tends to lift the valve body 74 from its valve seat 75.
  • the valve seat 75 is adjoined by a chamber 78, which is connected to the membrane chamber 59 via a bore 79 of relatively small cross-section and to the atmosphere via a supply air bore 80 and an air filter 81.
  • the chamber 78 Via a suction line 82, the chamber 78 is connected to the suction port of a fluid, in particular membrane pump 83, which is driven by a motor (not shown) via a shaft 84.
  • the motor in turn, can be supplied with voltage or electrical power by an actuator in order to ensure a certain drive behavior of the motor.
  • the diaphragm pump has a pressure line 85 which is connected to the diaphragm chamber 59 via a throttle bore 86.
  • Gas passes from the inlet chamber 31 via a throttle bore 87 into an operator space 88 which is delimited by the valve seat 42.
  • An electromagnet 89 is provided in the interior of the operator room and can be supplied with electrical power via an electrical feed line 90.
  • An armature 91 cooperates with the electromagnet 89, which is extended as a two-armed lever 92 and is rotatably mounted in the housing 30 at 93. The armature or the lever is under the action of a tension spring 94 which is attached to the housing 30 at one end.
  • a rod 96 is articulated via a pivot point 95, which rod is connected to a valve body 97 which corresponds to the valve seats 42 and 43.
  • the gas pressure regulator according to FIG. 2 just described has the following function: starting from the idle state shown in the drawing, the valve seat 33 is closed by the valve body 35 under the expansion effect of the compression spring 36, that is to say the connection between the gas inlet and gas outlet is interrupted.
  • the fluid or diaphragm pump 83 is at rest, the pressure and suction lines 85 and 82 have no differential pressure with respect to one another. Valves 97, 42 and 52, 51 and 74, 75 are closed.
  • the electromagnet 89 is without current.
  • the gas supply to the burner 10 is interrupted.
  • the electromagnet 89 is excited via the line 90, whereupon it attracts its armature 91 and moves the valve body 97 from the seat 42 to the seat 43 and closes this valve seat against the action of the return spring 94.
  • the channel 47 and thus the gas outlet from the chamber 39 is separated in terms of pressure.
  • pressure from the gas inlet via the inlet chamber 31 and the throttle bore 87 now builds up delayed in the operator room 88.
  • the valve center space communicates with the chamber 39 via the channel 40, so that a pressure slowly builds up in this chamber, which leads to the valve body 35 lifting off from its valve seat 33 against the restoring force of the compression spring 36 .
  • the pressure in the chamber 39 is limited by the fact that a back pressure, caused by the back-up effect of the burner nozzles, builds up in the burner in the outlet chamber 32.
  • the back pressure acts on the diaphragm chamber 49 via lines 47 and 48 and strives to move the diaphragm 54 against the restoring force of the spring 55 when it rises above a certain value.
  • the pressure threshold at which this movement occurs can be set using the adjusting screw 56.
  • a movement of the first control membrane 54 against the adjusting screw 56 results in the valve body 52 being lifted off the valve seat 51, this movement being supported by compression spring 53.
  • the characteristic of the compression spring 53 is, however, much weaker than that of the compression spring 55.
  • the pressure in the valve center space 41 is also limited.
  • the pressure threshold just set is used to ensure a gas pressure in the outlet chamber 32, which is necessary for proper ignition in the area of the connected grate burner. If the pressure in the outlet chamber 32 is too low, the gas flames in the grate burner will only burn partially, and too high a pressure will result in a deflagration in the fireplace.
  • the shaft 84 of the diaphragm pump 83 is acted on, so that the diaphragm pump 83 begins to deliver.
  • a pressure builds up in the membrane chamber 59, which pressure is also present in the membrane chamber 57 via the opening 58.
  • the pressure present here is limited by an actuating movement of the diaphragm 60. If the pressure in the diaphragm chamber 59 rises to a value which causes the second regulating diaphragm 60 to retract against the restoring force of the spring 62, the valve body 74 is supported by its seat 75 by the action of the spring 77. This limits the pressure in the membrane chamber 59.
  • the level of the pressure in the membrane chamber 59 is thus proportional to the respective nominal pressure of the gaseous fuel in the burner.
  • water from the cold water network 20 begins to flow via the flow meter 19 into the coil 21 of the water heater 7.
  • the flow meter 19 registers the process water throughput and communicates it to the flow or membrane switch 16 as a pressure fluctuation via the measuring line 18.
  • the actuating rod 15 extends from the membrane switch 16 and compresses the compression spring 62. Compression is limited when the stop 66 moves against the top of the housing 30.
  • the rest position is given in that the stop piece 64 moves under the restoring action of the spring 65 against the free end of the adjusting screw 67.
  • the adjusting screw 67 By moving the adjusting screw 67, the nominal value for the gas pressure during heating operation is thus specified.
  • an increased pressure value compared to the pressure value for heating operation can therefore be specified when using domestic hot water. Both pressure values are kept constant via the second control membrane 60.
  • the motor of the fluid or diaphragm pump can be controlled.
  • the action on the diaphragm pump 83 is interrupted.
  • This means that the diaphragm chamber 57 is depressurized, since the pressure difference between the suction and pressure ports of the diaphragm pump is reduced via the throttle bore 79.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Fluid-Driven Valves (AREA)
  • Control Of Fluid Pressure (AREA)

Claims (2)

1. Régulateur de pression de gaz pour un chauffe-eau à circulation avec chauffe-eau instantané avec un siège de soupape (33) disposé dans un boîtier (30) et occupé par un obturateur (35) relié à une membrane (38) exposée à la pression du gaz en aval de la soupape (33/35) dans la chambre de sortie (32), et avec une première membrane régulatrice (54) exposée d'une part à la pression du gaz en aval de la soupape (33/35), et avec une pompe à fluides (83), la face de la première membrane régulatrice (54), non en contact avec le gaz, n'étant exposée qu'à la pression produite par la pompe à fluides (83), cette pression étant limitée par une soupape (75/76) combinée avec une deuxième membrane régulatrice (60) subissant l'action d'un ressort (62), caractérisé par le fait qu'un élément d'appui (63) pour le ressort (62) de la deuxième membrane régulatrice (60) est relié à une tige de commande (15) d'un commutateur hydraulique (16) qui est combiné avec une conduite de prise d'eau (20, 21, 22) du chauffe-eau instantané (7).
2. Régulateur de pression de gaz suivant la revendication 1, caractérisé par le fait que la tige de commande (15) est munie d'une pièce de butée (64) qui peut se déplacer entre deux butées (66, 67) réglables.
EP81101003A 1980-02-22 1981-02-13 Régulateur de pression à gaz Expired EP0035147B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81101003T ATE8700T1 (de) 1980-02-22 1981-02-13 Gasdruckregler.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19808005149U DE8005149U1 (de) 1980-02-22 1980-02-22 Gasdruckregler
DE8005149U 1980-02-22

Publications (2)

Publication Number Publication Date
EP0035147A1 EP0035147A1 (fr) 1981-09-09
EP0035147B1 true EP0035147B1 (fr) 1984-07-25

Family

ID=6713218

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81101003A Expired EP0035147B1 (fr) 1980-02-22 1981-02-13 Régulateur de pression à gaz

Country Status (3)

Country Link
EP (1) EP0035147B1 (fr)
AT (1) ATE8700T1 (fr)
DE (1) DE8005149U1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0103303A3 (fr) * 1982-09-15 1984-06-06 Joh. Vaillant GmbH u. Co. Source de chaleur chauffée au combustible
EP0108349A3 (fr) * 1982-10-30 1985-05-02 Joh. Vaillant GmbH u. Co. Source de chaleur chauffée au gaz
DE3524015A1 (de) * 1984-07-13 1986-02-13 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Gasdruckregler
AT397850B (de) * 1989-12-12 1994-07-25 Vaillant Gmbh Gasdruckregler
ITPD980164A1 (it) * 1998-07-01 2000-01-01 Sit La Precisa Spa Gruppo valvolare per la regolazione automatica della portata di un gas combustibile.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2116112A5 (fr) * 1970-11-27 1972-07-07 Junkers & Co
FR2433159A1 (fr) * 1978-08-11 1980-03-07 Matsushita Electric Ind Co Ltd Appareil servant a regler la temperature du chauffage d'un fluide
EP0016326A1 (fr) * 1979-02-14 1980-10-01 Joh. Vaillant GmbH u. Co. Régulateur de pression du gaz

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2116112A5 (fr) * 1970-11-27 1972-07-07 Junkers & Co
FR2433159A1 (fr) * 1978-08-11 1980-03-07 Matsushita Electric Ind Co Ltd Appareil servant a regler la temperature du chauffage d'un fluide
EP0016326A1 (fr) * 1979-02-14 1980-10-01 Joh. Vaillant GmbH u. Co. Régulateur de pression du gaz

Also Published As

Publication number Publication date
DE8005149U1 (de) 1981-11-19
EP0035147A1 (fr) 1981-09-09
ATE8700T1 (de) 1984-08-15

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