EP0269509A1 - Gas valve incorporating a security for a hot water apparatus without a permanent pilot flame - Google Patents

Gas valve incorporating a security for a hot water apparatus without a permanent pilot flame Download PDF

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Publication number
EP0269509A1
EP0269509A1 EP87402575A EP87402575A EP0269509A1 EP 0269509 A1 EP0269509 A1 EP 0269509A1 EP 87402575 A EP87402575 A EP 87402575A EP 87402575 A EP87402575 A EP 87402575A EP 0269509 A1 EP0269509 A1 EP 0269509A1
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EP
European Patent Office
Prior art keywords
cam
valve
axis
section
generator
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.)
Granted
Application number
EP87402575A
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German (de)
French (fr)
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EP0269509B1 (en
Inventor
Jean-Luc Veislinger
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.)
Saunier Duval Eau Chaude Chauffage SDECC SA
Original Assignee
Saunier Duval Eau Chaude Chauffage SDECC SA
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Application filed by Saunier Duval Eau Chaude Chauffage SDECC SA filed Critical Saunier Duval Eau Chaude Chauffage SDECC SA
Priority to AT87402575T priority Critical patent/ATE59459T1/en
Publication of EP0269509A1 publication Critical patent/EP0269509A1/en
Application granted granted Critical
Publication of EP0269509B1 publication Critical patent/EP0269509B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
    • F24H9/2042—Preventing or detecting the return of combustion gases
    • F24H9/205—Closing the energy supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/247—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using mechanical means

Definitions

  • the invention relates to a gas inlet valve which incorporates a safety device allowing the stopping of a hot water production appliance of the water heater or gas bath heater type in the event of a draft anomaly in particular in the flue gas exhaust pipe and is particularly applicable to appliances without a permanent pilot.
  • a safety device must be able to react to any anomaly, due for example to a bad draft, a backflow, an obstruction of the duct or a extractor failure, anomaly which causes the combustion products to be pushed back into the room.
  • thermosensitive elements placed at the end of the draft hood opens at a certain temperature and closes a gas inlet solenoid valve.
  • a thermosensitive bulb acts on an expandable membrane which itself cuts off the admission of gas to the pilot of the device or acts directly on its thermoelectric safety mechanism to put the device in safety.
  • a draft anomaly in a duct is detected thanks to a small tube which modifies the functioning of a pilot light with air and gas premix and then puts the device in safety.
  • thermoelectric safety and that one cannot therefore intervene in reaction to an anomaly in the combustion products evacuation pipe.
  • the solution which consists in making the gas inlet valve of the appliance act positively, a safety mechanism using a lever for triggering the cocking member of said valve and a movable member. controlled by a thermosensitive element arranged in a good place to react for example from a rise in temperature in a flue gas evacuation pipe.
  • This safety mechanism as described in French patent 1,574,526 in the name of the Applicant comprises a lever cocking mechanism of the gas inlet valve to the appliance which can be snapped onto a trigger lever whose pivoting causes disarming and closing said gas inlet valve under the effect of its return spring and which has a thermosensitive element reacting in a manner known per se to a rise in temperature at the level of the evacuation of the combustion products , which acts positively on said trigger lever of the arming mechanism by means of an expandable bellows whose displacement causes the pivoting of a branch of said lever and the stopping of the device.
  • this mechanisne can present taking into account the various parts to realize and to assemble, it has the disadvantage, although being with positive security that is to say reacting in the direction of a shutdown of the device in the event of failure of said mechanism, of not ensuring safety in the event of a false operation on the part of a user.
  • disarming the gas inlet valve can always be blocked by the user if the latter maintains a pressure on the arming lever or if he immobilizes it by any means; in this case the gas remains admitted into the appliance whatever the operating conditions.
  • said valve comprising a rotary cocking button and a metastable mechanism of the type with a blistering membrane linked to a bulb and reacting to a rise in temperature of the combustion products
  • a cam mounted to rotate around its axis under the action. of said button, which cooperates with the control rod of the gas inlet valve and which is also movable in translation on said axis under the action of the blistering membrane mechanism to make it escape from the control rod of the valve and put the device safe.
  • the cam comprises an off-center section disposed between a cylindrical section of small diameter and a cylindrical section of larger diameter, both centered on its axis, a generator of the off-center section extending a generator of the section of small diameter, another diametrically opposite generator of this off-center section extending a generator of the section of larger diameter.
  • the operating axis of the valve control rod is in abutment against the edge of the intermediate cylindrical section of the cam and protrudes above the cylindrical section of smaller diameter.
  • the body 17 of the gas inlet valve contains a valve 6 connecting a gas inlet pipe 18 and the outlet pipe 19 to the appliance.
  • a plug 20 closing off the body 17 is crossed in leaktight fashion by the operating rod 21 of the valve 6 normally returned to its seat by the spring 11.
  • Said body 17 of the tap is integral with a control box 22, one of which is tubular 15 is aligned with the rod 21 of the valve.
  • This tubular part contains an axis 7 which abuts against the end of the rod 21, which opens on the other side into the housing 22 and is supported on a cam 2.
  • the latter can rotate around its axis AA ⁇ and has the form shown in Figure 2.
  • a cylindrical section 23 of small diameter It has a cylindrical section 23 of small diameter, another cylindrical section 24 of larger diameter both centered on the axis AA ⁇ , and interposed between the two, a cylindrical section 25 off center generator extends the generator of section 23 of small diameter, and of which another generator diametrically opposite to the first extends the generator of section 24 of large diameter.
  • the cylindrical section 23 of the cam 2 is provided with a recess 26 with two interior plates to receive without friction a maneuvering needle 27 secured to a rotary control button 1.
  • a ball retainer 14 associated with a spring 16, integrated in a button 1 serves to maintain the latter in one or the other of its two positions by means of two suitable housings (28, 28 ⁇ ) provided in the housing 22.
  • the other cylindrical section 24 of the cam 2 has a threaded interior orifice 29 to which is fixed an adjustment screw 9.
  • This screw is coaxial with a fixed rod 3 on which it can slide.
  • the rod carries an end stop 30 for a spring 13 bearing against the screw 9.
  • the valve body 17 also supports a safety assembly known per se consisting of a blistering metal membrane 8 capable of reacting in the direction of a passage to the convex shape shown in dotted lines during the heating of a bulb placed in an appropriate position, for example in a VMC sheath and connected to the membrane by the conduit 5.
  • the membrane 8 bears against the end of a lever 4 pivoting about an axis 10 and the other end of which abuts against screw 9.
  • the fail-safe valve as described, operates as follows.
  • Figure 1 shows the elements in the rest position when the valve 6 is closed on its seat.
  • the user when he wants to arm the device, turns the button 1 anticlockwise until the ball 14 is engaged in the other housing 28 ⁇ of the housing 22.
  • the maneuvering needle 27 engaged in the recess 26 made the cam 2 rotate in an identical manner.
  • the axis 7 bears on the off-centered cylindrical section 25 of the said cam and pushed by the latter goes up into the tubular part 15, and exerts a thrust on the rod 21 in the direction of the opening of the valve 6 against the return force of the spring 11.
  • the cam 2 remains offset from the axis 7 preventing the device from being reset. This means that, even if the user, after having returned the button 1 to its starting position, wanted to arm it again immediately, its rotation would have no effect on the axis 7 and the valve 6 could in no case to be reopened.
  • the device is positively safe because in the event of a bulb leakage or failure, the blistering membrane immediately takes on the convex shape for which there is action on the lever 4 and securing the device.
  • the device according to the invention can operate not only with the blistering blade previously described, but also with an expansion bellows, for example coupled to a buckling blade or also with any expandable system whose sealing and metastability functions are not provided by the same element.
  • the user can stop the device by turning the button 1 clockwise, which brings the cam 2 back to the position in FIG. 1 for which the axis 7 is lowered and the valve 6 is closed under the action of the spring 11.
  • the spacing between the screw 9 and the cam 2 can be adjusted, these two parts cooperating by a threaded connection. It is thus possible to adjust the "overhang" of the axis 7 on the part 25 of the cam as a function of the movement of the arm 4.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Safety Valves (AREA)

Abstract

According to the invention the said valve comprises a rotary actuating knob (1) and a bubbling diaphragm mechanism (8, 4) connected to a bulb and reacting to an increase in temperature of the combustion products. It also comprises a cam (2) mounted so as to rotate about its axis AA' under the action of the said knob which cooperates with the actuating rod (7, 21) of the gas inlet shutter (6) and which can also move in translation over the said axis AA' under the action of the bubbling diaphragm mechanism (8) in order to cause it to be released from the actuating rod (7) of the shutter and to make the apparatus safe. Application to hot water apparatuses without a permanent pilot flame. <IMAGE>

Description

L'invention concerne un robinet d'admission gaz qui intègre un dispositif de sécurité permettant l'arrêt d'un appareil de production d'eau chaude du genre chauffe-eau ou chauffe-bains à gaz en cas d'anomalie de tirage notamment dans le conduit d'évacuation des gaz brûlés et s'applique particulièrement aux appareils sans veilleuse permanente.The invention relates to a gas inlet valve which incorporates a safety device allowing the stopping of a hot water production appliance of the water heater or gas bath heater type in the event of a draft anomaly in particular in the flue gas exhaust pipe and is particularly applicable to appliances without a permanent pilot.

On sait que lorsqu'un appareil à gaz d'une certaine puissance est raccordé à un conduit de fumée, on considère que son fonctionnement a lieu dans des conditions normales lorsque la totalité des produits de combustion est évacuée dans ce conduit. Dans certains cas, le tirage naturel étant insuffisant, un extracteur est disposé dans le conduit ou dans une gaine collectrice des gaz brûlés de plusieurs appareils ; l'installation est dite alors à ventilation méca­nique contrôlée (V.M.C.).It is known that when a gas appliance of a certain power is connected to a flue, it is considered that its operation takes place under normal conditions when all of the combustion products are evacuated in this flue. In some cases, the natural draft being insufficient, an extractor is placed in the duct or in a collecting duct for the burnt gases of several appliances; the installation is then said to have controlled mechanical ventilation (V.M.C.).

De toute façon, quelle que soit la solution adoptée, tirage naturel on VMC., il faut qu'un dispositif de sécurité puisse réagir à toute anomalie, due par exemple à un mauvais tirage, à un refoulement, à une obstruction du conduit ou une panne d'extracteur, anomalie qui provoque le re­foulement des produits de combustion dans le local.In any case, whatever the solution adopted, natural draft on VMC., A safety device must be able to react to any anomaly, due for example to a bad draft, a backflow, an obstruction of the duct or a extractor failure, anomaly which causes the combustion products to be pushed back into the room.

Il existe de nombreux dispositifs de sécurité adaptés à réagir à ces anomalies. Dans certains le contact électrique d'un élément thermosensible placé à l'éxtrémité du coupe-tirage s'ouvre à une certaine température et ferme une électrovalve d'admission gaz. Dans d'autres systèmes un bulbe thermosensible agit sur une membrane dilatable qui elle-même coupe l'admission de gaz à la veilleuse de l'appareil ou agit directement sur son mécanisme de sécurité thermoélectri­que pour mettre l'appareil en sécurité. Pour d'autres ins­tallations on détecte une anomalie de tirage dans un conduit grâce à un petit tube qui modifie le fonctionnement d'une veilleuse à prémélange d'air et de gaz et met alors l'appa­reil en sécurité.There are many safety devices adapted to react to these anomalies. In some, the electrical contact of a thermosensitive element placed at the end of the draft hood opens at a certain temperature and closes a gas inlet solenoid valve. In other systems, a thermosensitive bulb acts on an expandable membrane which itself cuts off the admission of gas to the pilot of the device or acts directly on its thermoelectric safety mechanism to put the device in safety. For other installations, a draft anomaly in a duct is detected thanks to a small tube which modifies the functioning of a pilot light with air and gas premix and then puts the device in safety.

Il existe cependant une catégorie d'appareils de production d'eau chaude par le gaz à laquelle ces différents dispositifs ne peuvent s'appliquer, ce sont les chauffe-eau et chauffe-bains à fonctionnement sans veilleuse permanente qui n'utilisent pas de système de sécurité thermoélectrique et que l'on ne peut donc faire intervenir en réaction à une anomalie au conduit d'évacuation des produits de combustion. Pour résoudre ce problème on connaît la solution qui consiste à faire agir de façon positive sur le robinet d'admission gaz de l'appareil, un mécanisme de sécurité utilisant un levier de déclenchement de l'organe d'armement dudit robinet et un organe déplaçable commandé par un élément thermosensible disposé en bonne place pour réagir par exemple d'une élévation de température dans un conduit d'évacuation des gaz brûlés.There is however a category of apparatus for producing hot water by gas to which these various devices cannot apply, it is water heaters and bath heaters operating without a permanent pilot which do not use a system. thermoelectric safety and that one cannot therefore intervene in reaction to an anomaly in the combustion products evacuation pipe. To solve this problem, the solution is known which consists in making the gas inlet valve of the appliance act positively, a safety mechanism using a lever for triggering the cocking member of said valve and a movable member. controlled by a thermosensitive element arranged in a good place to react for example from a rise in temperature in a flue gas evacuation pipe.

Ce mécanisme de sécurité tel que décrit dans le brevet français 1 574 526 au nom de la Demanderesse comporte un mécanisme d'armement à levier du robinet d'ad­mission gaz à l'appareil qui peut être encliqueté sur un levier de déclenchement dont le pivotement entraîne le désar­mement et la fermeture dudit robinet d'admission de gaz sous l'effet de son ressort de rappel et qui dispose d'un élément thermosensible réagissant de façon connue en soi à une élé­vation de température au niveau de l'évacuation des produits de combustion, qui agit de façon positive sur ledit levier de déclenchement du mécanisme d'armement par l'intermédiaire d'un soufflet dilatable dont le déplacement provoque le pivotement d'une branche dudit levier et l'arrêt de l'appa­reil. Hormis les difficultés de réalisation que peut présen­ter ce mécanisne compte-tenu des diverses pièces à réaliser et à assembler, il présente l'inconvénient, bien qu'étant à à sécurité positive c'est-à-dire réagissant dans le sens d'un arrêt de l'appareil en cas de défaillance dudit méca­nisme, de ne pas assurer la sécurité en cas de fausse ma­noeuvre de la part d'un utilisateur. En effet le désarmement du robinet d'admission gaz peut toujours être bloqué par l'utilisateur si celui-ci maintient une pression sur le levier d'armement ou s'il l'immobilise par un moyen quelcon­que ; dans ce cas le gaz reste admis dans l'appareil quelles que soient les conditions de fonctionnement.This safety mechanism as described in French patent 1,574,526 in the name of the Applicant comprises a lever cocking mechanism of the gas inlet valve to the appliance which can be snapped onto a trigger lever whose pivoting causes disarming and closing said gas inlet valve under the effect of its return spring and which has a thermosensitive element reacting in a manner known per se to a rise in temperature at the level of the evacuation of the combustion products , which acts positively on said trigger lever of the arming mechanism by means of an expandable bellows whose displacement causes the pivoting of a branch of said lever and the stopping of the device. Apart from the difficulties of realization that this mechanisne can present taking into account the various parts to realize and to assemble, it has the disadvantage, although being with positive security that is to say reacting in the direction of a shutdown of the device in the event of failure of said mechanism, of not ensuring safety in the event of a false operation on the part of a user. In fact, disarming the gas inlet valve can always be blocked by the user if the latter maintains a pressure on the arming lever or if he immobilizes it by any means; in this case the gas remains admitted into the appliance whatever the operating conditions.

C'est pourquoi la Demanderesse à mis au point un nouveau robinet d'admission gaz de réalisation et de fonctionnement plus simple qui évite les inconvénients propres aux mécanismes connus et présente une sécurité totale.This is why the Applicant has developed a new gas inlet valve which is simpler to produce and operate which avoids the drawbacks inherent in known mechanisms and presents total security.

Selon l'invention ledit robinet comportant un bou­ton rotatif d'armement et un mécanisme métastable du genre à membrane clo­quante lié à un bulbe et réagissant à une élévation de tem­pérature des produits de combustion comporte une came montée rotative autour de son axe sous l'action dudit bouton, qui coopère avec la tige de commande du clapet d'admission gaz et qui est également déplaçable en trans­lation sur ledit axe sous l'action du mécanisme à membrane cloquante pour la faire échapper de la tige de commande du clapet et mettre l'appareil en sécurité.According to the invention, said valve comprising a rotary cocking button and a metastable mechanism of the type with a blistering membrane linked to a bulb and reacting to a rise in temperature of the combustion products comprises a cam mounted to rotate around its axis under the action. of said button, which cooperates with the control rod of the gas inlet valve and which is also movable in translation on said axis under the action of the blistering membrane mechanism to make it escape from the control rod of the valve and put the device safe.

Selon une caractéristique principale de l'invention, la came comporte une section décen­trée disposée entre une section cylindrique de petit diamè­tre et une section cylindrique de plus grand diamètre, toutes deux centrées sur son axe, une génératrice de la section décentrée prolongeant une génératrice de la section de petit diamètre, une autre génératrice diamétralement opposée de cette section décentrée prolongeant une généra­trice de la section de plus grand diamètre.According to a main characteristic of the invention, the cam comprises an off-center section disposed between a cylindrical section of small diameter and a cylindrical section of larger diameter, both centered on its axis, a generator of the off-center section extending a generator of the section of small diameter, another diametrically opposite generator of this off-center section extending a generator of the section of larger diameter.

Selon une autre caractéristique de l'in­vention, l'axe de manoeuvre de la tige de commande du cla­pet est en appui contre le bord de la section cylindrique intermédiaire de la came et déborde au-dessus de la section cylindrique de plus faible diamètre.According to another characteristic of the invention, the operating axis of the valve control rod is in abutment against the edge of the intermediate cylindrical section of the cam and protrudes above the cylindrical section of smaller diameter.

Les caractéristiques particulières et autres avantages de l'invention ressortiront maintenant de la des­cription qui va suite d'un exemple non limitatif de réalisa­tion et en référence aux dessins annexés qui représentent :

  • figure 1 une vue schématique en coupe du robinet ;
  • figure 2 une vue en perspective de la came montrée à la figure 1.
The particular characteristics and other advantages of the invention will now emerge from the description which follows from a nonlimiting example of embodiment and with reference to the appended drawings which represent:
  • Figure 1 a schematic sectional view of the valve;
  • Figure 2 is a perspective view of the cam shown in Figure 1.

Le corps 17 du robinet d'admission gaz renferme un clapet 6 mettant en communication un conduit d'arrivée de gaz 18 et le conduit 19 de départ vers l'appa­reil. Une bouchon 20 obturant le corps 17 est traversé de façon étanche par le tige de manoeuvre 21 du clapet 6 normale­ment rappelé sur son siège par le ressort 11. Ledit corps 17 du robinet est solidaire d'un boîtier de commande 22 dont une partie tubulaire 15 est alignée avec la tige 21 du clapet. Cette partie tubulaire renferme un axe 7 qui est en butée contre l'extrémité de la tige 21, qui débouche de l'autre côté dans le boîtier 22 et prend appui sur une came 2. Celle-ci peut tourner autour de son axe AAʹ et a la forme représentée à la figure 2. Elle comporte une section cylin­drique 23 de petit diamètre, une autre section cylindrique 24 de plus grand diamètre toutes deux centrées sur l'axe AAʹ, et intercalée entre les deux, une section cylindrique 25 dé­centrée dont une génératrice prolonge la génératrice de la section 23 de petit diamètre,et dont une autre génératrice diamétralement oppo­sée à la première prolonge la génératrice de la section 24 de grand diamètre. En position repos l'axe 7 est en appui contre le bord de la section cylindrique intermédiaire 25, débordant même au-dessus de la section cylindrique 23 de plus faible diamètre. La section cylindrique 23 de la came 2 est munie d'un évidement 26 à deux plats intérieurs pour recevoir sans frottement une aiguille de manoeuvre 27 solidaire d'un bouton rotatif de commande 1. Celui-ci peut occuper deux positions entre la position repos représentée et une position armement où il a effectué une rotation de 180° dans le sens inverse des aiguilles d'une montre, à l'encontre de la force de rappel d'un ressort de tor­sion 12. Un dispositif de retenue à bille 14 associée à un ressort 16, intégré dans un bouton 1 sert à mainte­nir ce dernier dans l'une ou l'autre de ses deux positions grâce à deux logements appropriés (28, 28ʹ) prévus dans le boîtier 22.The body 17 of the gas inlet valve contains a valve 6 connecting a gas inlet pipe 18 and the outlet pipe 19 to the appliance. A plug 20 closing off the body 17 is crossed in leaktight fashion by the operating rod 21 of the valve 6 normally returned to its seat by the spring 11. Said body 17 of the tap is integral with a control box 22, one of which is tubular 15 is aligned with the rod 21 of the valve. This tubular part contains an axis 7 which abuts against the end of the rod 21, which opens on the other side into the housing 22 and is supported on a cam 2. The latter can rotate around its axis AAʹ and has the form shown in Figure 2. It has a cylindrical section 23 of small diameter, another cylindrical section 24 of larger diameter both centered on the axis AAʹ, and interposed between the two, a cylindrical section 25 off center generator extends the generator of section 23 of small diameter, and of which another generator diametrically opposite to the first extends the generator of section 24 of large diameter. In the rest position the axis 7 is in abutment against the edge of the intermediate cylindrical section 25, even projecting above the cylindrical section 23 of smaller diameter. The cylindrical section 23 of the cam 2 is provided with a recess 26 with two interior plates to receive without friction a maneuvering needle 27 secured to a rotary control button 1. The latter can occupy two positions between the rest position shown and an arming position where it has rotated 180 ° counterclockwise, against the return force of a torsion spring 12. A ball retainer 14 associated with a spring 16, integrated in a button 1 serves to maintain the latter in one or the other of its two positions by means of two suitable housings (28, 28ʹ) provided in the housing 22.

L'autre section cylindrique 24 de la came 2 dispose d'un orifice intérieur fileté 29 auquel est fixé une vis de réglage 9. Cette vis est coaxiale à une tige fixe 3 sur laquelle elle peut coulisser. La tige porte une butée d'extrémité 30 pour un ressort 13 prenant appui contre la vis 9.The other cylindrical section 24 of the cam 2 has a threaded interior orifice 29 to which is fixed an adjustment screw 9. This screw is coaxial with a fixed rod 3 on which it can slide. The rod carries an end stop 30 for a spring 13 bearing against the screw 9.

Le corps de robinet 17 supporte par ailleurs un ensemble de sécurité connu en soi constitué d'une membrane métallique cloquante 8 susceptible de réagir dans le sens d'un passage à la forme convexe représentée en pointillé lors de l'échauffement d'un bulbe placé en position appro­priée par exemple dans une gaine VMC et raccordé à la mem­brane par le conduit 5. La membrane 8 est en appui contre l'extrémité d'un levier 4 pivotant autour d'un axe 10 et dont l'autre extrémité vient en butée contre la vis 9.The valve body 17 also supports a safety assembly known per se consisting of a blistering metal membrane 8 capable of reacting in the direction of a passage to the convex shape shown in dotted lines during the heating of a bulb placed in an appropriate position, for example in a VMC sheath and connected to the membrane by the conduit 5. The membrane 8 bears against the end of a lever 4 pivoting about an axis 10 and the other end of which abuts against screw 9.

Le robinet à sécurité intégrée,ainsi dé­crit, fonctionne de la façon suivante.The fail-safe valve, as described, operates as follows.

La figure 1 montre les éléments en posi­tion repos quand le clapet 6 est fermé sur son siège. L'uti­lisateur, lorsqu'il veut armer l'appareil, tourne le bouton 1 dans le sens inverse des aiguilles d'une montre jusqu'à ce que la bille 14 soit engagée dans l'autre logement 28ʹ du boîtier 22. Au cours de ce mouvement l'aiguille de manoeu­vre 27 engagée dans l'évidement 26 a fait tourner de façon identique la came 2. L'axe 7 en appui sur la section cylin­drique décentrée 25 de ladite came et poussée par celle-ci monte dans la partie tubulaire 15, et exerce une poussée sur la tige 21 dans le sens de l'ouverture du clapet 6 à l'encontre de la force de rappel du ressort 11. Le gaz pro­venant du conduit 18 est donc admis vers l'appareil par le conduit 19. Si, lors d'un puisage, l'évacuation des produits de combustion s'effectue normalement, la membrane 8 et le levier 4 occupent la position représentée. L'axe 7 exerçant une pression sur la partie 25 de la came 2, normalement à l'axe AAʹ (figure 2), le bouton reste en position armée, aidé en cela par l'encliquetage de la bille 14 dans l'évide­ment 28ʹ sous l'action du petit ressort 16.Figure 1 shows the elements in the rest position when the valve 6 is closed on its seat. The user, when he wants to arm the device, turns the button 1 anticlockwise until the ball 14 is engaged in the other housing 28ʹ of the housing 22. During this movement the maneuvering needle 27 engaged in the recess 26 made the cam 2 rotate in an identical manner. The axis 7 bears on the off-centered cylindrical section 25 of the said cam and pushed by the latter goes up into the tubular part 15, and exerts a thrust on the rod 21 in the direction of the opening of the valve 6 against the return force of the spring 11. The gas coming from the pipe 18 is therefore admitted towards the device through the pipe 19 If, during a drawing, the evacuation of the combustion products takes place normally, the diaphragm 8 and the lever 4 occupy the position shown. The axis 7 exerting pressure on the part 25 of the cam 2, normally at the axis AAʹ (FIG. 2), the button remains in the armed position, helped in this by the snap-fastening of the ball 14 in the recess 28ʹ under the action of the small spring 16.

S'il y a une anomalie au niveau de l'éva­cuation des produits de combustion de l'appareil, caractérisée par l'échauffement du bulbe, l'élévation de température trans­mise par le conduit 5 va faire passer brutalement la membrane 8 dans la position convexe montrée en pointillés. Le levier 4 pivote alors autour de l'axe 10 et son extrémité opposée exerce une pression sur la vis 9, orientée vers la droite du dessin.If there is an anomaly in the evacuation of the combustion products from the appliance, characterized by the heating of the bulb, the rise in temperature transmitted by the conduit 5 will suddenly cause the membrane 8 to pass into the position convex shown in dotted lines. The lever 4 then pivots around the axis 10 and its opposite end exerts pressure on the screw 9, oriented to the right of the drawing.

La vis 9 et la came 2 qui lui est solidaire par la liaison filetée 29 s'écartent alors vers la droite en coulissant sur la tige 3 à l'encontre de la force du ressort 13 et en s'éloignant du bouton de manoeuvre 1. Cet éloignement est rendu possible par le fait que l'aiguille 27 du bouton est introduite avec jeu dans l'orifice 26 de la came. L'axe 7 étant en "porte à faux" sur la section 25 de la came va échap­per de celle-ci et retomber sur la section cylindrique 23 sous la poussée du ressort 11 qui va également fermer le cla­pet 6, interrompant l'admission du gaz à l'appareil.The screw 9 and the cam 2 which is integral with it by the threaded connection 29 then move to the right by sliding on the rod 3 against the force of the spring 13 and moving away from the operating button 1. This distance is made possible by the fact that the needle 27 of the button is inserted with play in the orifice 26 of the cam. The axis 7 being "cantilevered" on the section 25 of the cam will escape from it and fall back on the cylindrical section 23 under the thrust of the spring 11 which will also close the valve 6, interrupting the admission of the gas to the appliance.

Après cette mise en sécurité, tant que le bulbe ne s'est pas refroidi et que la membrane 8 n'a pas repris sa forme initiale, la came 2 reste décalée de l'axe 7 interdisant le réarmement de l'appareil. Cela veut dire que, même si l'utilisateur, après avoir ramené le bouton 1 dans sa position de départ, voulait l'armer à nouveau aussitôt, sa rotation serait sans effet sur l'axe 7 et le clapet 6 ne pourrait en aucun cas être réouvert.After this securing, as long as the bulb has not cooled down and the membrane 8 has not returned to its initial shape, the cam 2 remains offset from the axis 7 preventing the device from being reset. This means that, even if the user, after having returned the button 1 to its starting position, wanted to arm it again immediately, its rotation would have no effect on the axis 7 and the valve 6 could in no case to be reopened.

Mais dès que le bulbe s'est refroidi et que la membrane 8 a repris sa forme, la vis 9 n'étant plus soumise à la pression du levier 4, le ressort 13 peut re­placer la came dans sa position initiale. Si, lors de ce mouvement le bouton était resté tourné en position armée, il suffit à l'utilisateur de ramener le bouton 1 en position de départ puis de réarmer pour se retrouver en position de fonc­tionnement normal. On voit donc que cette sécurité peut agir à tout moment pendant la manoeuvre d'ouverture et quelle que soit la position en rotation du bouton 1.But as soon as the bulb has cooled and the membrane 8 has resumed its shape, the screw 9 no longer being subjected to the pressure of the lever 4, the spring 13 can return the cam to its initial position. If, during this movement, the button remained rotated in the armed position, the user need only return the button 1 to the starting position and then reset to return to the normal operating position. It is therefore seen that this security can act at any time during the opening maneuver and whatever the rotational position of button 1.

Le dispositif est à sécurité positive car en cas de fuite ou de défaillance du bulbe, la membrane cloquante prend aussitôt la forme convexe pour laquelle il y a action sur le levier 4 et mise en sécurité de l'appareil.The device is positively safe because in the event of a bulb leakage or failure, the blistering membrane immediately takes on the convex shape for which there is action on the lever 4 and securing the device.

On notera que le dispositif selon l'inven­tion peut fonctionner non seulement avec la lame cloquante précédemment décrite, mais aussi avec un soufflet de dilatation par exemple couplé à une lame de flambage ou encore avec tout système dilatable dont les fonctions étanchéité et métastabilité ne sont pas assurées par le même élément.It will be noted that the device according to the invention can operate not only with the blistering blade previously described, but also with an expansion bellows, for example coupled to a buckling blade or also with any expandable system whose sealing and metastability functions are not provided by the same element.

Enfin et indépendamment de cette mise en sécurité, l'utilisateur peut arrêter l'appareil en tournant le bouton 1 dans le sens des aiguilles d'une montre ce qui ramène la came 2 dans la position de la figure 1 pour la­quelle l'axe 7 est redescendu et le clapet 6 s'est refermé sous l'action du ressort 11.Finally and independently of this securing, the user can stop the device by turning the button 1 clockwise, which brings the cam 2 back to the position in FIG. 1 for which the axis 7 is lowered and the valve 6 is closed under the action of the spring 11.

L'écartement entre la vis 9 et la came 2 peut être réglé, ces deux pièces coopérant par une liaison filetée. On peut ainsi ajuster le "porte à faux" de l'axe 7 sur la partie 25 de la came en fonction du débattement du bras 4.The spacing between the screw 9 and the cam 2 can be adjusted, these two parts cooperating by a threaded connection. It is thus possible to adjust the "overhang" of the axis 7 on the part 25 of the cam as a function of the movement of the arm 4.

Claims (7)

1.- Robinet d'admission gaz à sécurité in­tégrée pour appareil de production d'eau chaude sans veilleuse permanente, permettant la fermeture de clapet d'admission en cas d'anomalie dans l'évacuation de ses produits de combus­tion, comportant un bouton rotatif d'armement manoeuvrant une came agis­sant sur la tige du clapet et un mécanisme métastable du genre à membrane cloquante lié à un bulbe réagissant à une élévation de tempéra­ture desdits produits de combustion, lequel mécanisme étant susceptible de provoquer la fermeture du clapet, caractérisé par le fait que la came (2) montée rotative autour de son axe AAʹ sous l'action du bouton (1) et coopérant avec la tige de commande (7,21) du clapet (6) est également déplaçable en translation sur ledit axe sous l'action du mécanisme (4,9) du genre à membrane cloquante (8), pour la faire échapper de la tige de commande du clapet et mettre l'appareil en sécurité.1.- Gas inlet valve with integrated safety for hot water production device without permanent pilot light, allowing the closing of the inlet valve in the event of an anomaly in the evacuation of its combustion products, comprising a rotary button cocking system operating a cam acting on the valve stem and a metastable mechanism of the type with a blistering membrane linked to a bulb reacting to a rise in temperature of said combustion products, which mechanism being capable of causing the valve to close, characterized by causes the cam (2) rotatably mounted around its axis AAʹ under the action of the button (1) and cooperating with the control rod (7,21) of the valve (6) is also displaceable in translation on said axis under the action of the mechanism (4,9) of the type with a blistering membrane (8), to make it escape from the control rod of the valve and put the device in safety. 2.- Robinet selon la revendication 1, caractérisé par le fait que la came (2) comporte une section décentrée (25) disposée entre une section cylin­drique (23) de petit diamètre et une section cylindrique (24) de plus grand diamètre, toutes deux centrées sur l'axe AAʹ.2.- valve according to claim 1, characterized in that the cam (2) has an off-center section (25) disposed between a cylindrical section (23) of small diameter and a cylindrical section (24) of larger diameter, all two centered on the AAʹ axis. 3.- Robinet selon la revendication 2 caractérisé par le fait qu'une génératrice de la section décentrée (25) prolonge une génératrice de la section (23) de petit diamètre, et qu'une autre génératrice diamétrale­ment opposée de cette section décentrée prolonge une généra­trice de la section (24) de plus grand diamètre.3.- Tap according to claim 2 characterized in that a generator of the off-center section (25) extends a generator of the section (23) of small diameter, and that another diametrically opposite generator of this off-center section extends a generator of the section (24) of larger diameter. 4.- Robinet selon les revendications 1, 2 et 3 caractérisé par le fait que l'axe (7) de manoeuvre de la tige (21) de commande du clapet (6) est en appui contre le bord de la section intermédiaire (25) de la came (2) et déborde au-dessus de la section cylindri­que (23) de plus faible diamètre.4.- Tap according to claims 1, 2 and 3 characterized in that the axis (7) for operating the rod (21) for controlling the valve (6) bears against the edge of the intermediate section (25 ) of the cam (2) and overflows above the cylindrical section (23) of smaller diameter. 5.- Robinet selon la revendications 1 et 2 caractérisé par le fait que le mécanisme à membrane clo­quante (8) agit par l'intermédiaire d'un levier (4) sur une vis de réglage (9) solidaire de la came (2) l'ensemble vis-came pouvant coulisser sur une tige fixe (3) selon l'axe AAʹ.5.- Tap according to claims 1 and 2 characterized in that the blistering membrane mechanism (8) acts by means of a lever (4) on an adjustment screw (9) integral with the cam (2) the screw-cam assembly which can slide on a fixed rod (3) along the axis AAʹ. 6.- Robinet selon la revendication 5 carac­térisé par le fait que le levier (4) agit sur la vis (9) dans le sens d'un éloignement de la came (2) de son bouton de ma­noeuvre (1) à l'encontre de la force de rappel d'un ressort (13).6.- Tap according to claim 5 characterized in that the lever (4) acts on the screw (9) in the direction of a distance from the cam (2) of its operating button (1) against the return force of a spring (13). 7.- Robinet selon la revendication 5 carac­térisé par le fait que l'écartement entre la vis (9) et la came (2) est réglable du fait de la liaison filetée que les rend solidaires.7.- Tap according to claim 5 characterized in that the spacing between the screw (9) and the cam (2) is adjustable due to the threaded connection that makes them integral.
EP87402575A 1986-11-17 1987-11-16 Gas valve incorporating a security for a hot water apparatus without a permanent pilot flame Expired - Lifetime EP0269509B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87402575T ATE59459T1 (en) 1986-11-17 1987-11-16 GAS VALVE WITH INTEGRATED SAFETY DEVICE FOR HOT WATER DEVICES WITHOUT PERMANENT PILOT FLAME.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8615929A FR2606854B1 (en) 1986-11-17 1986-11-17 INTEGRATED SAFETY GAS INLET VALVE FOR HOT WATER PRODUCTION DEVICE WITHOUT PERMANENT PILOT LIGHT
FR8615929 1986-11-17

Publications (2)

Publication Number Publication Date
EP0269509A1 true EP0269509A1 (en) 1988-06-01
EP0269509B1 EP0269509B1 (en) 1990-12-27

Family

ID=9340859

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87402575A Expired - Lifetime EP0269509B1 (en) 1986-11-17 1987-11-16 Gas valve incorporating a security for a hot water apparatus without a permanent pilot flame

Country Status (4)

Country Link
EP (1) EP0269509B1 (en)
AT (1) ATE59459T1 (en)
DE (2) DE269509T1 (en)
FR (1) FR2606854B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100453870C (en) * 2005-09-30 2009-01-21 陈雪峰 Safety valve with pressure releaser for electric water heater

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2656670B1 (en) * 1990-01-04 1992-04-24 Saunier Duval Eau Chaude GAS INLET VALVE WITH OVERFLOW SAFETY FOR APPARATUS FOR PRODUCING HOT WATER WITHOUT PILOT LIGHT.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4361167A (en) * 1979-11-29 1982-11-30 Ogontz Controls Company Snap-acting drain valve
EP0185587A1 (en) * 1984-12-07 1986-06-25 Saunier Duval Eau Chaude Chauffage - Sdecc Security mechanism reacting to abnormal draught for a gas-heated hot water boiler without a permanent pilot flame

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4361167A (en) * 1979-11-29 1982-11-30 Ogontz Controls Company Snap-acting drain valve
EP0185587A1 (en) * 1984-12-07 1986-06-25 Saunier Duval Eau Chaude Chauffage - Sdecc Security mechanism reacting to abnormal draught for a gas-heated hot water boiler without a permanent pilot flame

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100453870C (en) * 2005-09-30 2009-01-21 陈雪峰 Safety valve with pressure releaser for electric water heater

Also Published As

Publication number Publication date
FR2606854A1 (en) 1988-05-20
DE269509T1 (en) 1988-09-22
FR2606854B1 (en) 1989-03-03
DE3767136D1 (en) 1991-02-07
EP0269509B1 (en) 1990-12-27
ATE59459T1 (en) 1991-01-15

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