EP0046843B1 - Soupape de sécurité d'allumage pour équipements chauffés à mazout ou à gaz - Google Patents

Soupape de sécurité d'allumage pour équipements chauffés à mazout ou à gaz Download PDF

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Publication number
EP0046843B1
EP0046843B1 EP81103519A EP81103519A EP0046843B1 EP 0046843 B1 EP0046843 B1 EP 0046843B1 EP 81103519 A EP81103519 A EP 81103519A EP 81103519 A EP81103519 A EP 81103519A EP 0046843 B1 EP0046843 B1 EP 0046843B1
Authority
EP
European Patent Office
Prior art keywords
valve
armature
accordance
slide
magnet
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
EP81103519A
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German (de)
English (en)
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EP0046843A1 (fr
Inventor
Helmut Abele
Franz Macho
Karl Rilling
Paul Weinmann
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0046843A1 publication Critical patent/EP0046843A1/fr
Application granted granted Critical
Publication of EP0046843B1 publication Critical patent/EP0046843B1/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
    • F23N5/10—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples
    • F23N5/107—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples using mechanical means, e.g. safety valves

Definitions

  • the invention relates to an ignition safety valve according to the preamble of the main claim.
  • a known valve of this type (not before published document DE-A-29 20 875)
  • due to the coupling of the closing member and armature only small forces are transmitted to the armature adhering to the magnetic poles, so that the electromagnet is smaller without loss of closing force than can be dimensioned so far.
  • the valve is not provided with a so-called reclosing lock, which prevents the valve from being opened again after an arbitrary closing of the valve and extinguishing of the main and pilot burner, as long as the armature still adheres to the magnetic poles due to the thermal inertia of the ignition fuse and simulates the presence of a pilot light, but this is no longer the case due to the previous interruption of the gas supply.
  • the slide is coupled to the actuator so that it is displaced by the rotary movement of the actuator on the rocker arm, with a locking surface of the slide entering an annular groove of a bolt rigidly connected to the armature.
  • the bolt assumes a different axial position with respect to the slide, in which the slide no longer corresponds to the annular groove in the bolt. In this position, the bolt prevents the slide from moving and the actuator from being rotated out of its basic position.
  • This version is relatively bulky and expensive.
  • the arrangement according to the invention with the characterizing features of the main claim results in an ignition safety valve of the generic type provided with a re-switching lock, which is characterized by a compact structure and by parts which can be produced for production.
  • the return spring of the actuator does not need to be matched to the return spring of the armature and the closing spring, and the actuator can only exert as much force on the slide as is required to open the valve and apply the armature.
  • the operating device of the valve can be simplified according to the feature of claim 7 in that a single manual actuator is used for the arbitrary opening and closing of the valve.
  • This actuator can have a middle position according to the features of claim 8, through which the actuator indicates a previous switch-on command.
  • the features are proposed according to claim 9.
  • the ignition fuse valve is to be functionally coupled to a so-called lock valve, which interrupts the gas supply to the main burner, as long as the ignition fuse valve is opened arbitrarily and the ignition fuse has not yet responded, it is proposed that the manually operated actuator according to the features of claim 10 to continue training.
  • Manufacturing and warehousing can be simplified if the parts are combined into an assembly in accordance with the features of claim 11.
  • the electromagnet which is preferably designed as a standard magnet insert, can be exchanged from the operating side of the ignition safety valve.
  • the ignition safety valve is integrated in a fitting which also has other regulating and control parts for the gas supply to the burner of the device to be monitored.
  • FIG. 1 An embodiment of the invention is shown in the drawing and in the following description explained in more detail.
  • the single figure shows a longitudinal section through an ignition safety valve, which is installed in a gas fitting for a gas heating furnace.
  • the valve has a housing consisting of three parts 10, 11 and 12, on which a plastic cover 13 is placed on top.
  • a gas inlet connector 14 is formed on the housing part 10 and leads into a chamber 15 in the housing part 11. This is connected via a passage 16 to a chamber 17 between the two housing parts 10 and 11, into which a gas outlet connection 18 indicated in the drawing and lying in front of the drawing plane opens.
  • the passage 16 is monitored by an ignition safety valve 20, the closing member 21 of which is loosely movably guided on a bolt 22 fastened in the housing part 10.
  • the closing member 21 is coupled with all-round movement play with a rocker arm 24 which is laterally supported on bearing webs 25 and 26 of the housing parts 11 and 12.
  • the right end of the rocker arm 24 in the drawing is angled upward and supported on a compression spring 28 which is supported on a cutter bearing 29 formed on the housing part 12.
  • the arrangement is such that the rocker arm 24 can snap from the end position shown, in which it is supported by the closing member 21 on the seat of the valve 20, to a second end position, which is indicated in the drawing at 30.
  • a so-called magnetic insert is arranged coaxially to the valve 20 by an over WUR f mother 33 32 containing an electromagnet having magnetic poles 34, the excitation winding is supplied by a thermocouple heated by a pilot flame.
  • An armature 36 is also movably guided in the housing of the magnet insert and is rigidly connected via a bolt 37 to a collar 38 and a mushroom-shaped pin 39.
  • a spring 40 engages the collar 38 and is supported on the housing of the magnet insert 32.
  • On the mushroom-shaped pin 39 a kegelhu: shaped plastic part 41 is blown open, which fits into a conical recess 42 in the closing member 21 and centers the parts against each other.
  • a manually operated push button 44 is provided, which is connected to a plunger 45 which is guided tightly in the housing part 12.
  • the plunger 45 has an annular shoulder 46 at the beginning of a section 47 which is weakened in diameter and which passes through a recess 48 in the rocker arm 24 with play and carries a disk-shaped driver 50 at its free end.
  • the recess 48 is dimensioned such that the unattenuated upper section of the plunger 45 can pass through it with play.
  • a slide 52 is guided in a longitudinally movable manner, which on its upper side 54 has a locking surface 55 at an edge zone partially covering the recess 48 in the rocker arm 24.
  • the slide 52 is provided with a raised section 58 and an adjoining, obliquely angled down section 59, which bears against the outside of the plastic part 41 under the influence of a spring 60 which is supported on the bearing web 26 and acts on the raised section 58 of the slide.
  • the spring 60 endeavors to always keep the slide 52 in contact with the plastic part 41; taking into account the fact that both the closing member 21 and the slide 52 moves with the rocker arm 24, the position of the slide 52 relative to the rocker arm 24 in its longitudinal direction depends on the distance which the plastic part 41 and thus the armature 36 of the Magnet insert 32 occupies opposite the closing member 21.
  • the locking surface 55 of the slide 52 has entered under the shoulder 46 of the plunger 45, so that when it is depressed, the rocker arm 24 pivots about its bearing point 25, 26 and thereby the closing member 21 is lifted from its seat and the armature 36 to the Magnetic poles 34 is applied.
  • the rocker arm 24 is pivoted from one to the other stable end position.
  • a helical spring 62 which is supported on the upper side of the housing part 12, acts on the pushbutton 44 from below.
  • the helical spring 62 endeavors to guide the pushbutton 44 upwards until an annular shoulder 63 on the circumference of the pushbutton 44 comes to rest on the inside of the cover 13.
  • the free end of a leaf spring 64 presses against the circumference of the pushbutton 44 and is clamped between the coil spring 62 and the housing part 12 with a bent base section 65.
  • the free end of the leaf spring 64 snaps behind the shoulder 63 of the pushbutton 44 when the shoulder 46 of the plunger 45 comes into contact with the locking surface 55 of the slide 52.
  • a cam-like elevation 66 strikes the switching tongue 67 of a switch 68 on its circumference, which, when the valve is installed, monitors the excitation circuit of a solenoid valve connected downstream of the ignition safety valve.
  • the switch 68 is designed such that the downstream solenoid valve is closed when the pushbutton 44 assumes its lowest position, which is reached when the armature 36 rests on the magnetic poles 34. After releasing the pushbutton 44, it returns under the influence of the helical spring 62 to a central position in which it is held in a latching manner by the leaf spring 64 reaching behind the shoulder 63. In this middle position, the engagement of the pushbutton 44 in the switch 68 has already ended, so that the downstream solenoid valve is opened again.
  • the mode of operation of the ignition protection valve shown is described below:
  • the parts assume the position shown in the drawing, in which the valve 20 is closed and the armature 36 is lifted from the magnetic poles 34 and the push button 44 assumes its uppermost position.
  • the plastic part 41 connected to the armature 36 engages snugly in the recess 42 of the closing member 21 and the slide 52 assumes its extreme left position, in which its blocking surface 55 projects into the movement path of the non-weakened section of the plunger 45.
  • the closing member 21 is pressed by the spring 40 and the compression spring 28 against the valve seat.
  • the relatively weak spring 60 does not significantly weaken the closing force.
  • valve 20 is open and the downstream solenoid valve is closed, pilot gas passing through a pilot gas line branched between the two valves from the main gas line to the pilot burner of the device and, after ignition, can heat the thermocouple which controls magnet insert 32.
  • this safety device has responded and the pushbutton 44 is then released, it returns, as already described, to the central position predetermined by the shoulder 63 and the detent spring 64, in which the downstream solenoid valve is open.
  • the distance of the driver 50 on the plunger 45 to its shoulder 46 is selected such that, when the armature 36 is applied and the valve 20 is open, the driver 50 does not yet influence the rocker arm 24 pivoted most counterclockwise in this position, so that the valve 20 remains open and the gas can flow to the main burner of the device.
  • valve 20 can close and the armature 36 can lift off the magnetic poles 34 without the plunger 45 opposing this return movement. A new switch-on attempt can then be made from the middle position of the pushbutton 44.
  • the compression spring 28 holds the rocker arm 24 in its end position corresponding to the opening of the valve 20.
  • the pushbutton 44 is to be pulled out of the middle position until the shoulder 63 comes to rest on the cover 13.
  • the driver 50 of the plunger 45 pivots the rocker arm 24 back into the starting position shown, in which the compression spring 28 presses the closing element 21 of the valve firmly onto its seat.
  • the armature 36 still adheres to the magnetic poles 34 due to the thermal inertia of the safety device, so that the plastic part 41 emerges from the recess 42 of the closing member 21 and the axial distance between the two parts increases.
  • the spring 60 moves the slide 52 to the right against the valve axis, the bent end portion 59 of the slide 52 sliding along the conical outer surface of the plastic part 41.
  • the arrangement could also be such that the push button has an eccentric surface above the shoulder 63, via which the leaf spring 64 comes out of its locked position by turning the push button 44.
  • the spring 60 displacing the slide 52 could also be supported instead of on the housing part 12 at the left end of the rocker arm, which can possibly simplify the assembly of the parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetically Actuated Valves (AREA)

Claims (11)

1. Soupape de sécurité d'allumage pour des appareils chauffés au gaz ou au mazout, avec un électro-aimant (32) commandé par un détecteur thermique chauffé par une flamme, et dont l'armature (36) est appliquée par un ressort de rappel (40) contre un organe de fermeture (21) de la soupape (20), cet organe de fermeture étant placé sur un levier basculant à deux bras (24) sur lequel agit par déclic un ressort de fermeture (28), le levier basculant (24) prenant appui dans l'une de ses positions terminales sur le siège de soupape par l'intermédiaire de l'organe de fermeture (21) et dans son autre position terminale sur les pôles magnétiques (34) de l'électro-aimant (32) par l'intermédiaire de l'armature (36), un organe de réglage (44) actionné manuellement étant en outre prévu, qui agit par l'intermédiaire d'un poussoir (45) sur le levier basculant (24) et peut amener celui-ci dans une position terminale dans laquelle la soupape (20) est ouverte et l'armature (36) appliquée sur les pôles magnétiques (34) tandis que le levier basculant (24) est basculé en retour hors de cette position terminale par les efforts réunis du ressort de rappel (40) et du ressort de fermeture (28) lorsque la force de maintien de l'électro-aimant (32) se situe ou bien tombe au-dessous d'une valeur prédéfinie, soupape de sécurité d'allumage caractérisée en ce que le poussoir (45) de l'organe de réglage actionné manuellement (44) est disposé de façon connue en soi à côté de l'axe de la soupape et de l'électro-aimant, et agit sur le levier basculant (24) par l'intermédiaire d'un coulisseau (52) qui est monté sur le levier basculant (24) de façon à pouvoir se déplacer, en étant poussé par un ressort (60) radialement contre une pièce (41) solidaire de l'armature (36) et en étant muni d'une surface d'arrêt (55) associée au poussoir (45) et qui sort du chemin de déplacement de ce poussoir (45) tant que la soupape étant fermée, l'armature (36) adhère aux pôles magnétiques (34).
2. Soupape selon la revendication 1, caractérisée en ce que le coulisseau (52) et la pièce (41) solidaire de l'armature (36) sont munis de surfaces d'accostage (59) inclinées.
3. Soupape selon la revendication 2, caractérisée en ce que la surface d'arrêt (55) du coulisseau (52) se situe dans le plan latéral de celui-ci et, dans l'une des positions du coulisseau (52), recouvre au moins partiellement une encoche (48) dans le levier basculant (24) permettant le libre passage du poussoir (45) à travers ce levier.
4. Soupape selon une des revendications 2 ou 3, caractérisée en ce que la pièce (41) solidaire de l'armature (36) et coopérant avec le coulisseau (52) est un capot, de préférence en matière plastique, monté en force sur l'extrémité formant poussoir de l'armature (36).
5. Soupape selon la revendication 4, caractérisée en ce que le capot (41) a un appendice conique qui vient s'adapter dans une cavité (42) de forme correspondante dans l'organe de fermeture (21) en centrant ce dernier par rapport à l'armature (36).
6. Soupape selon une des précédentes revendications, caractérisée en ce que l'organe de fermeture (21) est librement guidé sur un axe (22) solidaire du boîtier.
7. Soupape selon une des précédentes revendications caractérisée en ce que l'organe de réglage manoeuvré manuellement (44) peut effectuer un second déplacement de réglage pour fermer volontairement la soupape.
8. Soupape selon la revendication 7, caractérisée en ce que l'organe de réglage manoeuvré manuellement (44) est susceptible d'être ramené de sa position terminale par l'action d'un ressort dans une position médiane prédéfinie par un dispositif d'enclenchement (63, 64), par laquelle il indique à l'extérieur qu'il y a eu précédemment un nombre d'enclenchements, dans laquelle il laisse l'organe de fermeture (21) arriver sur son siège sous l'influence du ressort de rappel (40) de l'armature (36) et du ressort de fermeture (28) lorsque la force de maintien de l'électro-aimant (32) se situe ou bien tombe au-dessous d'une valeur prédéfinie.
9. Soupape selon les revendications 3 et 7, caractérisée en ce que le poussoir (45) comporte une partie (47) réduite en diamètre, et qui passe à travers l'encoche (48) sur le levier basculant (24) et porte derrière ce levier un organe d'entraînement (50), tandis que la surface d'arrêt (55) sur le coulisseau (52) coopère avec l'épaulement (46), ménagé à la transition vers la partie de diamètre réduit (47), du poussoir (45).
10. Soupape selon une des précédentes revendications caractérisée en ce que l'organe de réglage actionné manuellement (44) agit sur un commutateur (68) qui commande le circuit du çourant d'excitation d'une soupape magnétique branchée à la suite.
11. Soupape selon une des précédentes revendications, caractérisée en ce que les appuis (25, 26) pour le levier basculant (24), le logement pour l'électro-aimant (32), et le guidage pour l'organe de réglage manoeuvré manuellement (44) sont prévus sur une même partie (12) du boîtier.
EP81103519A 1980-08-16 1981-05-08 Soupape de sécurité d'allumage pour équipements chauffés à mazout ou à gaz Expired EP0046843B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803031114 DE3031114A1 (de) 1980-08-16 1980-08-16 Zuendsicherungsventil fuer gas- oder oelbeheizte geraete
DE3031114 1980-08-16

Publications (2)

Publication Number Publication Date
EP0046843A1 EP0046843A1 (fr) 1982-03-10
EP0046843B1 true EP0046843B1 (fr) 1985-02-20

Family

ID=6109829

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Application Number Title Priority Date Filing Date
EP81103519A Expired EP0046843B1 (fr) 1980-08-16 1981-05-08 Soupape de sécurité d'allumage pour équipements chauffés à mazout ou à gaz

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EP (1) EP0046843B1 (fr)
DE (2) DE3031114A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109237066A (zh) * 2018-11-14 2019-01-18 佛山市顺德区美的洗涤电器制造有限公司 燃气旋塞阀

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2726716A (en) * 1950-12-30 1955-12-13 Robertshaw Fulton Controls Co Safety control for gaseous fuel burners
US2675508A (en) * 1953-01-19 1954-04-13 Gen Controls Co Electromagnetically controlled operator
AT205714B (de) * 1957-05-07 1959-10-10 Friedr Siemens Werke Ag Thermoelektrische Zündsicherung für Gasbrenner
DE1205923B (de) * 1964-02-11 1965-12-02 Vaillant Joh Kg Thermoelektrische Zuendsicherung, insbesondere fuer Umlauf-Gaswassererhitzer
FR1519739A (fr) * 1967-02-20 1968-04-05 Theobald Ets A Dispositif de sécurité à couple thermo-électrique pour brûleurs à gaz
US3597138A (en) * 1970-04-03 1971-08-03 Itt Fuel-burning apparatus

Also Published As

Publication number Publication date
EP0046843A1 (fr) 1982-03-10
DE3169003D1 (en) 1985-03-28
DE3031114A1 (de) 1982-04-08

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