EP1591721A1 - Soupape de sécurité et de régulation de débit de gaz pour cuisinières - Google Patents

Soupape de sécurité et de régulation de débit de gaz pour cuisinières Download PDF

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Publication number
EP1591721A1
EP1591721A1 EP04425294A EP04425294A EP1591721A1 EP 1591721 A1 EP1591721 A1 EP 1591721A1 EP 04425294 A EP04425294 A EP 04425294A EP 04425294 A EP04425294 A EP 04425294A EP 1591721 A1 EP1591721 A1 EP 1591721A1
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EP
European Patent Office
Prior art keywords
valve
inner space
gas
axis
closure member
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.)
Withdrawn
Application number
EP04425294A
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German (de)
English (en)
Inventor
Lauro Bosisio
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.)
MP Gas Controls SpA
Original Assignee
MP Gas Controls SpA
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 MP Gas Controls SpA filed Critical MP Gas Controls SpA
Priority to EP04425294A priority Critical patent/EP1591721A1/fr
Publication of EP1591721A1 publication Critical patent/EP1591721A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/002—Gaseous fuel
    • F23K5/007—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2900/00—Special features of, or arrangements for fuel supplies
    • F23K2900/05001—Control or safety devices in gaseous or liquid fuel supply lines
    • 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

Definitions

  • the present invention relates to a safety and gas flow regulating valve in cooking tops.
  • valves are generally constructed following the structure depicted in patent IT1200081 (or in the equivalent patent FR 2583506) which mainly comprises a "regulation section” including a valve for flow-rate regulation interlocked with a suitable regulating knob to be rotatably utilised by a user, a “safety section” having a closure member and extending along an axis of its own, and suitable pipe fittings for connection with the supply pipeline of the gas network.
  • regulation section including a valve for flow-rate regulation interlocked with a suitable regulating knob to be rotatably utilised by a user
  • safety section having a closure member and extending along an axis of its own, and suitable pipe fittings for connection with the supply pipeline of the gas network.
  • This valve of known type internally defines a gas path extending along all the just mentioned “sections” and going from the point of connection to the supply pipeline until the burner on the cooking top; also present is a kinematic chain capable of imparting an axial movement to a safety element (generally consisting of a rod operatively active on the closure member in the safety section) based on a corresponding axial movement of the stem supporting the gas regulating knob.
  • a safety element generally consisting of a rod operatively active on the closure member in the safety section
  • the closure member in the safety section is made of a ferromagnetic material and is retained in an open configuration by an electromagnet which in turn receives the necessary electric energy from a thermocouple exposed to the gas under combustion.
  • thermocouple When current generated by the thermocouple is zero or in any case too low (which happens when the gas is turned off by the user or unintentionally due to spilling of water on the burner, for example), the electromagnet stops exerting its attraction on the closure member that closes the gas passage by virtue of the action of an elastic counter-element.
  • valves of known type usually have suitable means for selecting the minimum flow-rate conditions depending on the type of gas: this means, usually comprising a rotatable needle provided with passage ports of different diameters, must be suitably regulated before or during mounting of the valve in a cooking top and therefore it must be easily accessible to a qualified operator.
  • valve of known type has a rather complicated kinematic chain adapted to set the closure member in a mechanical manner: this fact negatively affects the complexity and sizes of the valve and also the valve reliability (which decreases on increasing of the number of pieces forming the kinematic chain) and costs.
  • valves of known type are not suitable for modern design requirements of the cooking tops demanding a particular positioning of the regulation and safety valves and above all also demanding a particular positioning of the regulation knobs; at the same time, the availability of a separated command to set one or more closure members (each of which will be operationally coupled with a respective regulating and safety valve) results in further drawbacks from the point of view of the valve integration into the cooking top or the gas cooker.
  • valves of known type have a further drawback, because they have very uncomfortable accesses to the rotatable needle which generally limits the assembling flexibility and sometimes does not allow intervention on the rotatable needle once the valve has been inserted into the structure of a cooking top or a gas cooker.
  • the present invention therefore aims at providing a safety and gas flow regulating valve in cooking tops capable of obviating the limits set out above.
  • the present invention aims at making a regulating and safety valve having the simplest possible structure and in particular capable of minimising the inner volume of the valve body taken up by the gas under any operating condition.
  • the present invention aims at making a valve enabling the closure member to be set through a simplified kinematic chain so as to minimise the overall dimensions, reduce the possibilities of malfunctions and/or breaks and increase safety in use.
  • the present invention also aims at providing a valve enabling the closure member to be set and the gas flow to be simultaneously regulated through a single command, which advantageously offers a greater possibility of integrating the valve into the cooking tops and obtaining reduced sizes.
  • valve in accordance with the present invention is generally identified by reference numeral 1 and it substantially comprises an inlet 3 (to be connected with a gas supply network) and an outlet 6 (brought into fluid communication with the inlet 3 and adapted to be connected with a burner).
  • valve 1 has a regulation portion 4, brought into fluid communication with the inlet 3 and/or the outlet 6, which in turn comprises a first inner space 4a to be taken up by a gas and a selecting element 4b (that can conveniently be a traditional selecting element of a flow rate regulating valve) interlocked with suitable flow rate regulating means 9 (described in more detail in the following) and operatively active in said first inner space 4a so that it can be moved in a reversible manner from a condition of minimum or zero gas flow rate to a condition of maximum gas flow rate towards the outlet 6.
  • a selecting element 4b that can conveniently be a traditional selecting element of a flow rate regulating valve
  • a safety portion 5 brought into fluid communication with the inlet 3 and/or outlet 6 and in turn comprising a second inner space 5a (brought into fluid communication at least with the first inner space 4a) and a closure member 5b operatively active in said second inner space 5a and adapted to be moved in a reversible manner from a closed condition at which it prevents passage of gas at least towards the first inner space 4a, and an open condition at which on the contrary it allows passage of gas at least towards the first inner space 4a.
  • setting means 7 is present that is operatively active on the closure member 5b to bring it at least to an open condition under predetermined operating conditions that typically can be those corresponding to switching on of the flame on a burner; this setting means will be manually operated by a user of the cooking top (or gas cooker) and will exert an appropriate mechanical action on the closure member 5b, to be illustrated in more detail in the following.
  • the setting means is active on the closure member 5b along at least one operating axis parallel to and offset with respect to the axis of a stem 9a.
  • the setting means 7 is operatively active at least partly out of the first and/or the second inner space 4a and/or 5a, and more particularly the setting means 7 is at least partly contained in a third inner space 7a that in turn is at least partly separated, from a physical and/or hydraulic point of view, from the remaining inner spaces of the valve that are on the contrary submitted to the gas/flow presence under operating conditions.
  • the inlet 3, regulation portion 4, safety portion 5 and outlet 6 form a single valve body 2 and define, at the inside of said valve body 2, an outflow path for a gas that is travelled over by the gas itself from the inlet 3 to the safety portion 5, to the regulation portion 4, to the outlet 6 (so that possible failure situations or situations of undesirable switching off of the flame will cause closure of the closure member 5b, and will consequently stop the gas outflow upstream of the regulation portion 4).
  • the setting means 7 is positioned in a third inner space 7a formed in the valve body 2: advantageously, this third inner space 7a is at least partly separated from the outflow path, and more particularly part of the third inner space 7a is not in fluid communication with the inlet 3 and/or the outlet 6 and/or the first inner space 4a and/or the second inner space 5a.
  • the setting means 7 substantially comprises a kinematic chain terminating at the closure member 5b and having its starting point at a location on which a user can directly or indirectly act (as illustrated later on).
  • valve 1 In order to simplify the structure of valve 1 and to have the maximum operating rapidity and efficiency, the embodiment of the present invention herein illustrated has a first actuator 7b operable by a user and movable along a first operating direction, which actuator is operatively associated with a second actuator 7c that in turn is movable in a second operating direction transverse to the first operating direction (and is substantially parallel to and/or coincident with a movement direction of the closure member 5b).
  • first and second operating portions 8b, 8c In order to convert movement of the first actuator 7b into a corresponding movement of the second actuator 7c (and therefore of the closure member 5b), the last-mentioned elements are mutually interfaced at respective first and second operating portions 8b, 8c; conveniently, these first and second operating portions 8b, 8c have surfaces that are inclined to the corresponding first and second operating directions and are mutually in contact under operating conditions, so that a translation of the first actuator 7b causes a relative slight rubbing between these two surfaces in contact the effect of which is a thrust exerted on the second actuator 7c giving rise to translation of same along the respective operating direction.
  • the first and second operating portions 8b, 8c can consist of prismatic bodies of a conical or frustoconical shape or having the conformation of a truncated pyramid.
  • inlet 3 and outlet 6 are disposed along a first axis, whereas the safety portion 5 extends in a second axis transverse (oblique for example, as shown in the accompanying drawings) to said first axis; as regards minimising of the vertical overall dimensions, said first and second axes can be considered as belonging to the same ideal plane, or in other words they define a lying plane on which most of the valve 1 structure extends.
  • the third operating space 7a comprises a first cavity receiving the first actuator 7b, and a second cavity adjacent to the first cavity and in turn housing the second actuator 7c: this second cavity is exposed to the gas flow (or, more precisely, to the gas leakage) and at the same time is hydraulically separated, through suitable sealing elements 7g, from the first cavity, so that the first actuator 7b works almost completely in an inner space of the valve body 2 that is not occupiable by the gas.
  • the regulation portion 4 (that must bear a means for regulation of the gas flow rate that in turn, must be able to emerge from a cooking top or the front piece of a gas cooker to be manipulated by a user) extends in a third axis coming out of the just mentioned lying plane, along a direction that can be for example, perpendicular to said plane.
  • a means for flow-rate regulation (9) which is operable by a user: in accordance with the known art, this regulation means 9 is operatively active on the regulation portion 4 and typically may comprise a knob engaged in a rotational manner on a stem 9a disposed along the third axis (or in other words along the extension axis of the regulation portion that from a geometrical and structural point of view intersects at least the axis of the safety portion and/or the axis defined by the joining line between the valve inlet and outlet).
  • the first actuator 7b is movable within the regulation portion 4 (and is therefore housed therein in an appropriate seat formed within the valve body 2 and that formally is part of the third inner space 7a) along a first operating axis parallel to and offset with respect to the third axis (that substantially is the axis of stem 9a), whereas the second actuator 7c is movable within the safety portion 5 (in a suitable seat that in turn is part of the third inner space 7a) along the second axis of the latter.
  • the conformation of the second actuator 7c has a shank 7d abutting against the closure member 5b and a base 7e of a greater transverse section than the corresponding transverse section of the shank 7d (and the shape of which for example matches that of the housing seat internally retaining the second actuator 7c at least partly).
  • the base 7e is interposed between the shank 7d and the second operating portion 8c: in this manner, and with such a difference in terms of cross sections, it is possible to let the gas pass, under open conditions of the closure member 5b, through the safety portion 5 until the regulation portion 4, whereas the base 7e ensures the non-penetration of the gas into the third inner space 7a.
  • the setting means 7 advantageously comprises a transmission 7f operatively active between the first actuator 7b and the stem 9a, said stem 9a being movable along the third axis so that a translation of the stem 9a corresponds to a translation of the first actuator 7b.
  • the present valve advantageously comprises means 10 for selecting a minimum gas flow rate; this selecting means 10 is operatively active on the regulation portion 4 and is operable (before or after installation of the valve 1 in a cooking top) by an operator depending on a predetermined type of gas or gas mixture.
  • This selecting means 10 comprises a selecting element that typically can be a needle having a plurality of passage orifices of different area, and interfacing means (that can merely consist of a suitably grooved head of said needle, so that it can be driven by a screwdriver or similar tool) accessible to an operator and associated with said selecting element.
  • the interfacing means is housed in the stem 9a and more specifically is housed within a cavity coaxial with the stem 9a extending along the third axis of the regulation portion 4: in this connection it is to be noted that arrangement of this coaxial cavity is made possible through offsetting of the first actuator, that in any case is operated indirectly by the stem 9a itself: in this way the structure of valve 1 is greatly compacted although said valve has all the functional features hitherto described.
  • a by-pass duct 8 is also present which extends from the first inner space 4a to the second inner space 5a; this by-pass duct 8 can be positioned in any manner in the valve body 2, provided it is adapted to perform the just described function, and can be travelled over by a gas flow under the open condition of the closure member 5b.
  • the safety portion 5 comprises an electromagnetic element adapted to move the closure member 5b (that therefore can be of ferromagnetic material or may comprise at least one ferromagnetic portion capable of being attracted by the electromagnet itself) at least to the open condition; in addition, the safety portion 5 comprises suitable counter-means (such as a spring, not shown in the accompanying drawings) adapted to move the closure member 5b at least to the closed condition.
  • suitable counter-means such as a spring, not shown in the accompanying drawings
  • the invention achieves important advantages.
  • the particular construction architecture of the present valve allows the kinematic chain for setting of the closure member to work in spaces internal to the valve body, thereby obtaining a great compactness of the product, and at the same time makes it possible to carry out a simultaneous operation of the setting means through the flow rate regulating means.
  • the kinematic setting chain of the closure member is very simple and is made up of a minimum number of pieces: this has beneficial effects in terms of production economy and operating reliability.
  • the structure of the present valve allows an easy and quick access to the means for selecting the minimum flow rate: therefore it is possible to intervene on this means also under assembling/embedding conditions of the valve in the cooking top, without the risk on the other hand that this additional functional character may be detrimental to the overall dimensions of the valve.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding And Controlling Fuel (AREA)
EP04425294A 2004-04-29 2004-04-29 Soupape de sécurité et de régulation de débit de gaz pour cuisinières Withdrawn EP1591721A1 (fr)

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EP04425294A EP1591721A1 (fr) 2004-04-29 2004-04-29 Soupape de sécurité et de régulation de débit de gaz pour cuisinières

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EP04425294A EP1591721A1 (fr) 2004-04-29 2004-04-29 Soupape de sécurité et de régulation de débit de gaz pour cuisinières

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EP1591721A1 true EP1591721A1 (fr) 2005-11-02

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EP04425294A Withdrawn EP1591721A1 (fr) 2004-04-29 2004-04-29 Soupape de sécurité et de régulation de débit de gaz pour cuisinières

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2615371A3 (fr) * 2012-01-16 2013-07-31 Turas Gaz Armatürleri Sanayi. Ve Ticaret A.S. Un robinet de gaz de sécurité Table de cuisson Avec deux sorties
EP3410012A1 (fr) * 2017-06-02 2018-12-05 TURAS GAZ ARMATÜRLERI SAN VE TIC A.s. Aluminium robinet de gaz profil

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2583506A1 (fr) * 1985-06-13 1986-12-19 Balestra L Micromecc Cav Robinet a gaz muni d'une soupape de securite et presentant un encombrement en hauteur reduit, pour plaques chauffantes et appareils de cuisson a gaz, en particulier pour cuisinieres
GB2196732A (en) * 1986-10-29 1988-05-05 Ti New World Ltd Mounting of gas valve
US5094259A (en) * 1990-05-10 1992-03-10 Hsu Chung Hsiung Automatic shut-off safety device for gas stove
GB2264767A (en) * 1992-02-19 1993-09-08 Concentric Controls Ltd Gas taps
US20020098455A1 (en) * 1999-08-09 2002-07-25 James Dale Peter Gas control assembly
US6634351B2 (en) * 2001-06-15 2003-10-21 Fagor, S. Coop. Thermostatic gas valve with standing pilot flow

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2583506A1 (fr) * 1985-06-13 1986-12-19 Balestra L Micromecc Cav Robinet a gaz muni d'une soupape de securite et presentant un encombrement en hauteur reduit, pour plaques chauffantes et appareils de cuisson a gaz, en particulier pour cuisinieres
GB2196732A (en) * 1986-10-29 1988-05-05 Ti New World Ltd Mounting of gas valve
US5094259A (en) * 1990-05-10 1992-03-10 Hsu Chung Hsiung Automatic shut-off safety device for gas stove
GB2264767A (en) * 1992-02-19 1993-09-08 Concentric Controls Ltd Gas taps
US20020098455A1 (en) * 1999-08-09 2002-07-25 James Dale Peter Gas control assembly
US6634351B2 (en) * 2001-06-15 2003-10-21 Fagor, S. Coop. Thermostatic gas valve with standing pilot flow

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2615371A3 (fr) * 2012-01-16 2013-07-31 Turas Gaz Armatürleri Sanayi. Ve Ticaret A.S. Un robinet de gaz de sécurité Table de cuisson Avec deux sorties
EP3410012A1 (fr) * 2017-06-02 2018-12-05 TURAS GAZ ARMATÜRLERI SAN VE TIC A.s. Aluminium robinet de gaz profil

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