EP1530984A1 - Portable fire extinguisher with extinguishing gun acting as a flow control valve - Google Patents

Portable fire extinguisher with extinguishing gun acting as a flow control valve Download PDF

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Publication number
EP1530984A1
EP1530984A1 EP04292467A EP04292467A EP1530984A1 EP 1530984 A1 EP1530984 A1 EP 1530984A1 EP 04292467 A EP04292467 A EP 04292467A EP 04292467 A EP04292467 A EP 04292467A EP 1530984 A1 EP1530984 A1 EP 1530984A1
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EP
European Patent Office
Prior art keywords
valve seat
valve
fire extinguisher
valve body
downstream
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Withdrawn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
EP04292467A
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German (de)
French (fr)
Inventor
Michel Lahouati
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.)
Eurofeu SA
Original Assignee
Eurofeu SA
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Filing date
Publication date
Application filed by Eurofeu SA filed Critical Eurofeu SA
Publication of EP1530984A1 publication Critical patent/EP1530984A1/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/002—Manually-actuated controlling means, e.g. push buttons, levers or triggers
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C13/00—Portable extinguishers which are permanently pressurised or pressurised immediately before use
    • A62C13/76—Details or accessories
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C17/00—Hand fire-extinguishers essentially in the form of pistols or rifles
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C31/00—Delivery of fire-extinguishing material
    • A62C31/02—Nozzles specially adapted for fire-extinguishing

Definitions

  • the present invention relates to the field of extinguishers portable devices capable of projecting an extinguishing agent such as water, powder or equivalent. More particularly, the invention relates to a blow gun placed at the downstream end of a hose itself connected upstream to the body of the extinguisher containing said extinguishing agent.
  • US 4 589 439 discloses a flow control valve for a control apparatus against fire, such as a fire hose or spray system.
  • the fire hose described in this document includes a connector and a nozzle.
  • the flow control valve consists of a valve seat convex fixed upstream and a sliding tubular member.
  • the tubular sliding element is movable between a position of closing and opening positions by means of a handle tilting which pivots about an axis and which carries a pawn. This last one is engaged in a groove on the outer surface of the element tubular slide to move it from one position to another.
  • the shape of the radial faces of the sliding tubular element is studied in such a way that the pressure forces acting on the different faces of said element are balanced. In this way, the element sliding tubular does not tend to bear against the seat of valve when the liquid flows through the lance. So when the firefighter releases tilt handle, flow control valve stays in the open position, the flow does not stop on its own. It should be noted that for the flow to have such an influence on the sliding tubular element, it is necessary that the pressure of the fluid passing through the spearhead is important.
  • valve seat is provided at its base with a flange ring whose diameter is greater than the diameter of the bore of the sliding tubular element.
  • lance head described has a large number of some of which have complex shapes.
  • lance head described is of a high production cost which is not in adequacy with use on portable extinguishers.
  • the invention aims to provide a portable fire extinguisher equipped with a blow gun, acting as a flow control valve, to remedy the aforementioned problems.
  • the invention relates to a portable fire extinguisher equipped with a blowgun forming a flow control valve of an agent extinguisher contained in a body of the fire extinguisher, the blower comprising a valve body provided with a conduit connecting an upstream end and a downstream end of the valve body along a main axis; a fitting upstream having a cylindrical through bore, coupled to the body of valve and to which is connected a hose supplying the blow gun in extinguishing agent; a downstream nozzle coupled to the valve body and expelling the extinguishing agent; a fixed valve seat member disposed axially in the conduit of the valve body; a sliding tubular element axially arranged axially in the conduit of said valve body in axial alignment with the valve seat member; and means actuating mechanism for moving the tubular element between a closed position in which the tubular element is in engagement sealed with the valve seat element and an open position in which the tubular element is away from the seat element of valve to allow the flow of
  • the connector has a tubular downstream portion positioned inside the conduit and whose downstream end is housed at inside the tubular element, and in that the downstream portion of the connection externally comprises a circular groove receiving a seal ensuring sealing the connection between the upstream connection and the tubular element sliding.
  • the sliding tubular element comprises externally two diametrically opposed lugs protruding radially outwardly, the valve body having lights receiving the pins, and the trigger having two lateral arms provided oblong holes cooperating respectively with the lugs so as to cause axial sliding of the tubular element when the trigger is pivoted.
  • the valve seat member has a valve seat having a cylindrical axial face and defining with a inner face of the valve body conduit an annular spacing allowing the passage of the extinguishing agent when the control valve flow rate is in the open position, the area of the spacing section annular being equal to the cross-sectional area of the through-bore the fitting.
  • valve seat member is downstream of the sliding tubular member, the valve seat member comprising a valve seat having a convex upstream face, an axial face cylindrical whose outer diameter is equal to or slightly less than inner diameter of the sliding tubular element and having a circular groove receiving a seal sealing the connection between the sliding tubular element and the valve seat in position closed of the valve.
  • the valve seat member has a diaphragm having the shape of a disc having as axis the main axis and a holding rod connected to a downstream radial face of said seat of valve and in the center of the diaphragm, the diaphragm having a diameter outside adjusted to the diameter of the duct to position the element of valve seat on the main axis and having a plurality of orifices allowing the passage of the extinguishing agent.
  • the area of the section of the plurality of apertures of the diaphragm is equal to the area of a section of the annular spacing separating the cylindrical axial face of the seat of valve of an inner face of the valve body conduit.
  • the diaphragm, the holding rod and the seat Valves are integrally formed so as to constitute only one only one piece preferably made of plastic.
  • one of the valve body, the connection, the sliding tubular element, the valve seat element and the nozzle is made of a plastic material.
  • the sliding tubular element is constrained towards the closed position by a spring bearing against a radial face of said tubular element and against an annular downstream wall of said coupling.
  • Figures 1 to 4 show the gun of the extinguisher portable device according to the invention in the embodiment currently prefer. From one figure to another, the same reference numbers are used to designate the same elements.
  • the direction of the flow of the extinguishing agent is indicated by the arrow in Figures 3 and 4. This flow qualifies as upstream and downstream the relative positions constituent elements. So, the upstream corresponds to the left side of the Figure 1, while the downstream corresponds to the right side of Figure 1.
  • the gun 1 is viewed from the side. It has a body 2 of axis A (called the main axis), also serving as a valve body. Upstream, a coupling 3 is coupled freely in rotation to the body 2 as this will be described below in detail. Downstream, a nozzle 4 is coupled to the valve body 2. As shown in Figures 3 and 4, different nozzle types 4 and 4 'having different shapes can be fixed by example by screwing, to the valve body 2. Furthermore, the blower 1 is provided with actuating means having, in this embodiment particular, the shape of a trigger 6.
  • the body 2, preferably made of plastic material, has a butt 7, for example plastic.
  • the periphery 71 of the Butt 7 has an ergonomic shape for easy gripping of the blow gun 1 by the user.
  • the butt 7 is recessed. It simply comprises a spacer 72 of X reinforcement.
  • the stock 7 can be flanked, on each of its sides, half-shells (not shown) of plastic.
  • the body 2 is crossed, from its upstream end at its downstream end, by a flow conduit 21 (FIGS. 3 and 4) cylindrical, having axis axis A.
  • a conduit 21 has a upstream bore 211 of diameter d and a downstream bore 212 of diameter D more important than the diameter d.
  • the conduit 21 therefore has a shoulder 213 globally located in the middle of the conduit 21.
  • the body 2 Housed inside the conduit 21, the body 2 comprises the fitting 3, a valve seat member 8 and a sliding jacket 5. These elements are represented in FIG. 2 in perspective.
  • the 3 comprises, internally, a cylindrical bore 34 of constant diameter and, externally, an upstream portion 31, a portion intermediate 32 and a downstream portion 33.
  • the upstream portion 31 is provided with a plurality of notches annular projections 311 protruding radially outwardly.
  • Notches 311 have a wedge-shaped section having a radial face 312 and a inclined face 313 from the periphery of the radial face 312 upstream of the radial face 312.
  • the role of the upstream portion 31 is to allow the connection of the connector 3 to the end of a hose whose other end is connected to the body of the portable extinguisher containing the agent extinguisher.
  • the plurality of notches rings 311 ensure the safe and tight connection between the blow gun 1 and the hose.
  • the intermediate portion 32 is cylindrical and fits into the upstream bore 211.
  • the outer diameter d 32 of the intermediate portion 32 is slightly smaller than d.
  • Each end of the intermediate portion 32 has an annular groove 321 and 322 adapted to respectively receive an O-ring seal.
  • the intermediate portion 32 is separated from the upstream portion 31 by an annular upstream wall 36 projecting radially towards outside.
  • the upstream wall 36 has a shaped section upstream oriented like the notches 311 described above.
  • the diameter of the downstream radial face 362 is greater than the radius d of the upstream bore 211 to maintain the relative position of the fitting 3 and the body valve 2.
  • the downstream portion 33 is cylindrical with an outside diameter d 33 and is housed inside the downstream bore 212.
  • the end of the downstream portion 33 externally has an annular groove 331 capable of receiving an O-ring.
  • the downstream portion 33 is separated from the intermediate portion 32 by an annular downstream wall 35 projecting radially outwardly.
  • the downstream wall 35 is of rectangular section and has a diameter 35 substantially equal to or less than D.
  • the portion upstream 31 is inserted on the side of the downstream bore 212 in the upstream bore 211, until the upstream wall 36 comes into contact with the shoulder 213. Then, the upstream wall 36 is deformed to allow to push forward the connector 3 in the duct 21. Inserting continues until the upstream wall 36 opens at the end upstream of the duct 21 and that the downstream wall 35 comes to bear on the shoulder 213 preventing any further movement to upstream (to the left in FIG. 1) of the connection 3 relative to the body 2. The upstream wall 36 then elastically resumes its initial shape. In particular, its radial face 362 prevents any downstream movement (to the right in FIG. 1) of connection 3 relative to body 2.
  • the fitting 3 is axially constrained but is free to rotate inside 21.
  • the intermediate and downstream portions 32 and 33 are housed in the body 2, then that the upstream portion 31 emerges from the upstream end of the body 2 of to be connected to a hose.
  • the valve seat member 8 is constituted by a valve seat 81, a diaphragm 83 having the shape of a disk of diameter d 83 , and a cylindrical connecting shaft 82.
  • the element valve seat 8 is made by molding a plastic material to form a single piece.
  • the valve seat 81 has a convex upstream face 811, an axial face 812 having a diameter d 81 and a downstream face 813 radial.
  • the axial face 812 is provided externally with an annular groove 814 capable of receiving an O-ring.
  • the diaphragm 83 is provided with through holes 834 quadrant-shaped defining a spacer 835 now an annular outer periphery 836 having a diameter smaller than the diameter D of the downstream bore 212.
  • the link axis 82 makes it possible to connect the center of the downstream face 813 of the valve seat 81 to the center of the disk that constitutes the diaphragm 83.
  • the diaphragm 83 is positioned in an obviously annular 214 practiced in the duct 21 at the downstream mouth of the body. 2.
  • the seat element of valve 8 positioned in the annular cavity 214 is maintained in position by the nozzle 4.
  • the diaphragm 83 allows to position correctly the valve seat 81 along the main axis A.
  • the surface of the section of the spacing ring defined between the outer axial surface 812 of the valve seat 81 and the wall of the downstream bore 212 is equal to the surface of the section of the bore 34 passing through the connection 3, and the passage section of the diaphragm 83.
  • the jacket 5 is a sliding tubular element. Externally, the dimensions of the liner 5 are adjusted to the diameter D of the downstream bore 212.
  • the outer axial face 53 has a circular groove 54 adapted to receive a seal sealing the connection between the sliding tubular element 5 and the body 2.
  • the outer axial face 53 has two lugs 51 and 52, diametrically opposed, projecting radially outwardly. In the assembled position of the sliding tubular element 5 inside the body 2, the lugs 51 and 52 pass through holes made in the body 2 and situated in a plane orthogonal to the butt 7 containing the main axis A.
  • the liner 5 has an inner bore 56 having a diameter d 5 .
  • the edge between the inner bore 56 and a downstream radial face 57 is chamfered so as to provide the downstream mouth with an inclined face 58 whose diameter increases in the direction of flow.
  • the liner 5 fits around the downstream end of the fitting 3.
  • the diameter d 5 is therefore slightly greater than or equal to the diameter d 33 .
  • the O-ring held in the groove 331 seals the connection between the sliding jacket and the connector 3.
  • the liner 5 is adapted to fit the valve seat 81 so as to seal, in a position closed of the flow control valve, the flow passage constituted by the annular space surrounding the axial face 812 of the valve seat 81.
  • the inner bore 56 thus receives the valve seat 81.
  • d 5 is equal to or slightly greater than the diameter d 81 .
  • the connection between the valve seat 81 and the liner 5 is sealed, in the closed position of the valve, by the O-ring positioned in the groove 814.
  • a spring 9 is positioned in the body 2 so that that one of its ends comes to bear on the downstream wall 35 and that the other of its ends comes to bear on an upstream radial face 59 of the jacket 5.
  • the jacket 5 is constrained by the spring 9 against the valve seat member 8 in a position by fault in which the flow control valve is closed ( Figure 3).
  • the downstream radial face 57 then take support against the diaphragm 83.
  • the chamfered face 58 makes it possible to position the jacket 5 axially relative to the seat valve 81 when closing the valve.
  • the trigger 6 comprises an actuating portion 61 of generally rectangular shape, placed below the body 2 and in before the butt 7, and two lateral arms 62 and 63 protruding parallel to two opposite sides of the actuating portion and coming from either side of the body 2.
  • the free ends of each of the lateral arms 62 and 63 opposite to the ends connected to the portion 61 are respectively provided with a hole 64 and 65.
  • pivot 66 is mounted between the free ends of the two lateral arms 62 and 63 inside the holes 64 and 65.
  • the pivot 66 is housed in a bore practiced in the valve body 2 along a pivot axis located off the main axis A in a plane perpendicular to it.
  • Each lateral arms 62 and 63 also have, in the vicinity of its point middle, an orifice 68 and 69 passing oblong, the large axis is oriented in the length of the lateral arm. These oblong holes 68 and 69 allow to maintain and drive the pins 51 and 52 of the shirt 5 emerging laterally from the body 2.
  • the trigger 6 can be moved by rotation about the axis of the pivot 66 by the pressure of the finger of the user applying an external force on the lower part 61.
  • the lateral arms 62 and 63 pivotally drive, via the coupling link the oblong holes 68 and 69 with the lugs 51 and 52, the liner 5 translation along the main axis A away from the valve seat element 8.
  • the extinguishing agent may then flow past the valve seat 8.
  • Flow control valve is in an open position.
  • the force exerted by the spring 9 makes it possible to constrain the valve in the closed position by moving the liner 5 towards the valve seat 81.
  • the lugs 51 and 52 then drive the lateral arms 62 and 63 and allow the trigger 6 to return to its original position.
  • the coupling 3, the nozzle 4 and the shirt 5 sliding are made of a plastic material.
  • the blower described above can therefore be qualified by the presence of a movable sleeve and a fixed drawer.
  • Such an arrangement has the advantage of generating only low pressure losses along of the flow path of the fluid and thus exhibit a high linearity the flow rate as a function of the actuating stroke of the trigger.
  • Such an arrangement is little or not subject to fouling course of time, which ensures a good seal throughout the use of the blow gun.

Abstract

The extinguisher has a blowgun (1) with a valve body (2) to form an extinguishing agent flow control valve. The body coupled to an upstream connector (3) has a bore receiving a valve seat. A trigger (6) pivoted by an external force displaces a liner between a closed position in which the liner is sealed tight with the seat and an open position in which the liner is spaced from the seat to permit the agent flow beyond the seat. The upstream connector is coupled to the flexible pipe supplying the blowgun with the extinguishing agent. The liner is arranged in the bore in an axial alignment with the valve seat.

Description

La présente invention concerne le domaine des extincteurs portatifs aptes à projeter un agent extincteur comme de l'eau, de la poudre ou l'équivalent. Plus particulièrement, l'invention concerne une soufflette placée à l'extrémité aval d'un tuyau souple lui-même connecté en amont au corps de l'extincteur contenant ledit agent extincteur.The present invention relates to the field of extinguishers portable devices capable of projecting an extinguishing agent such as water, powder or equivalent. More particularly, the invention relates to a blow gun placed at the downstream end of a hose itself connected upstream to the body of the extinguisher containing said extinguishing agent.

Dans le domaine particulier du matériel professionnel de lutte contre les incendies, il existe des lances équipées d'une vanne de contrôle du débit de l'agent extincteur. Par exemple, le document US 4 589 439 décrit une vanne de contrôle du débit pour un appareil de lutte contre le feu, tel qu'une lance à incendie ou un système de pulvérisation. La lance à incendie décrite dans ce document comporte un raccord et une buse. La vanne de contrôle de débit est constituée d'un siège de vanne fixe convexe orienté vers l'amont et d'un élément tubulaire coulissant. L'élément tubulaire coulissant est déplaçable entre une position de fermeture et des positions d'ouverture au moyen d'une poignée basculante qui pivote autour d'un axe et qui porte un pion. Ce dernier est engagé dans une rainure située sur la surface extérieure de l'élément tubulaire coulissant pour déplacer celui-ci d'une position à l'autre.In the particular field of professional equipment firefighting, there are lances equipped with a valve of flow control of the extinguishing agent. For example, US 4 589 439 discloses a flow control valve for a control apparatus against fire, such as a fire hose or spray system. The fire hose described in this document includes a connector and a nozzle. The flow control valve consists of a valve seat convex fixed upstream and a sliding tubular member. The tubular sliding element is movable between a position of closing and opening positions by means of a handle tilting which pivots about an axis and which carries a pawn. This last one is engaged in a groove on the outer surface of the element tubular slide to move it from one position to another.

La forme des faces radiales de l'élément tubulaire coulissant est étudiée de manière à ce que les forces de pression s'exerçant sur les différentes faces dudit élément s'équilibrent. De cette manière, l'élément tubulaire coulissant n'a pas tendance à venir en appui contre le siège de vanne lorsque le liquide s'écoule à travers la lance. Ainsi, lorsque le pompier relâche la poignée basculante, la vanne de contrôle de débit reste dans la position d'ouverture, l'écoulement ne s'arrête pas de lui-même. Il est à noter que, pour que l'écoulement ait une telle influence sur l'élément tubulaire coulissant, il faut que la pression du fluide traversant la tête de lance soit importante.The shape of the radial faces of the sliding tubular element is studied in such a way that the pressure forces acting on the different faces of said element are balanced. In this way, the element sliding tubular does not tend to bear against the seat of valve when the liquid flows through the lance. So when the firefighter releases tilt handle, flow control valve stays in the open position, the flow does not stop on its own. It should be noted that for the flow to have such an influence on the sliding tubular element, it is necessary that the pressure of the fluid passing through the spearhead is important.

Par ailleurs, le siège de vanne est muni à sa base d'un rebord annulaire dont le diamètre est supérieur au diamètre de l'alésage de l'élément tubulaire coulissant. En conséquence, en position fermée de la vanne de contrôle de débit, la face radiale aval de l'élément tubulaire coulissant vient en appui sur la face radiale du rebord du siège de vanne. In addition, the valve seat is provided at its base with a flange ring whose diameter is greater than the diameter of the bore of the sliding tubular element. As a result, in the closed position of the flow control valve, the downstream radial face of the tubular element sliding bears on the radial face of the flange of the valve seat.

Ensuite, sachant que, de manière générale, les pièces constituant les lances à incendie sont en métal et donc d'un poids important et que les dimensions de celles-ci sont importantes, la tête de lance décrite dans ce document correspond à une utilisation professionnelle.Then, knowing that, in general, the parts constituting fire hoses are made of metal and therefore of a weight important and that the dimensions of these are important, the head of launches described in this document corresponds to a use professional.

De plus, l'utilisation des deux mains est nécessaire lors de la manipulation d'une telle tête de lance : une main tenant le corps de la tête de lance tandis que l'autre actionne la poignée basculante pour contrôler le débit. Un tel mécanisme est incompatible avec l'utilisation d'un extincteur portatif.In addition, the use of both hands is necessary when handling such a spearhead: a hand holding the body of the head while the other operates the tilting handle to control the flow. Such a mechanism is incompatible with the use of a portable extinguisher.

Enfin, la tête de lance décrite comporte un grand nombre de pièces ayant pour certaines des formes complexes. En conséquence, la tête de lance décrite est d'un coût de production élevé qui n'est pas en adéquation avec une utilisation sur des extincteurs portatifs.Finally, the described lance head has a large number of some of which have complex shapes. As a result, lance head described is of a high production cost which is not in adequacy with use on portable extinguishers.

L'invention a pour but de proposer un extincteur portatif muni d'une soufflette, jouant le rôle de vanne de contrôle de débit, visant à remédier aux problèmes précités.The invention aims to provide a portable fire extinguisher equipped with a blow gun, acting as a flow control valve, to remedy the aforementioned problems.

Pour cela l'invention a pour objet un extincteur portatif muni d'une soufflette formant vanne de contrôle de débit d'un agent extincteur contenu dans un corps de l'extincteur, la soufflette comportant un corps de vanne muni d'un conduit reliant une extrémité amont et une extrémité aval du corps de vanne selon un axe principal ; un raccord amont comportant un alésage cylindrique traversant, couplé au corps de vanne et auquel est raccordé un tuyau souple alimentant la soufflette en agent extincteur ; une buse aval couplée au corps de vanne et expulsant l'agent extincteur ; un élément de siège de vanne fixe disposé axialement dans le conduit du corps de vanne ; un élément tubulaire coulissant axialement disposé axialement dans le conduit dudit corps de vanne en alignement axial avec l'élément de siège de vanne ; et, des moyens d'actionnement permettant de déplacer l'élément tubulaire entre une position fermée dans laquelle l'élément tubulaire est en engagement étanche avec l'élément de siège de vanne et une position ouverte dans laquelle l'élément tubulaire se trouve à l'écart de l'élément de siège de vanne afin de permettre l'écoulement de l'agent extincteur au-delà de l'élément de siège de vanne, caractérisé en ce que le raccord est couplé contraint axialement mais libre en rotation relativement au corps de vanne, en ce que le corps de vanne comporte des moyens de préhension ayant la forme d'une crosse et en ce que les moyens d'actionnement sont constitués par une gâchette apte à pivoter sous l'action d'une force extérieure autour d'un pivot situé hors de l'axe principal dans un plan perpendiculaire à ce dernier.For this purpose the invention relates to a portable fire extinguisher equipped with a blowgun forming a flow control valve of an agent extinguisher contained in a body of the fire extinguisher, the blower comprising a valve body provided with a conduit connecting an upstream end and a downstream end of the valve body along a main axis; a fitting upstream having a cylindrical through bore, coupled to the body of valve and to which is connected a hose supplying the blow gun in extinguishing agent; a downstream nozzle coupled to the valve body and expelling the extinguishing agent; a fixed valve seat member disposed axially in the conduit of the valve body; a sliding tubular element axially arranged axially in the conduit of said valve body in axial alignment with the valve seat member; and means actuating mechanism for moving the tubular element between a closed position in which the tubular element is in engagement sealed with the valve seat element and an open position in which the tubular element is away from the seat element of valve to allow the flow of the extinguishing agent beyond the valve seat member, characterized in that the coupling is coupled constrained axially but free in rotation relative to the body of valve, in that the valve body comprises gripping means having the shape of a stick and that the actuating means are constituted by a trigger capable of pivoting under the action of a force outside a pivot located off the main axis in a plane perpendicular to the latter.

De préférence, le raccord possède une portion aval tubulaire positionnée à l'intérieur du conduit et dont l'extrémité aval est logée à l'intérieur de l'élément tubulaire, et en ce que la portion aval du raccord comporte extérieurement une rainure circulaire recevant un joint assurant l'étanchéité de la liaison entre le raccord amont et l'élément tubulaire coulissant.Preferably, the connector has a tubular downstream portion positioned inside the conduit and whose downstream end is housed at inside the tubular element, and in that the downstream portion of the connection externally comprises a circular groove receiving a seal ensuring sealing the connection between the upstream connection and the tubular element sliding.

De préférence, l'élément tubulaire coulissant comporte extérieurement deux ergots diamétralement opposés faisant saillie radialement vers l'extérieur, le corps de vanne comportant des lumières recevant les ergots, et la gâchette comportant deux bras latéraux munis de trous oblongs coopérant respectivement avec les ergots de manière à entraíner le coulissement axial de l'élément tubulaire lorsque la gâchette est actionnée en pivotement.Preferably, the sliding tubular element comprises externally two diametrically opposed lugs protruding radially outwardly, the valve body having lights receiving the pins, and the trigger having two lateral arms provided oblong holes cooperating respectively with the lugs so as to cause axial sliding of the tubular element when the trigger is pivoted.

De préférence, l'élément de siège de vanne comporte un siège de vanne ayant une face axiale cylindrique et définissant avec une face intérieure du conduit du corps de vanne un espacement annulaire permettant le passage de l'agent extincteur lorsque la vanne de contrôle de débit est en position ouverte, l'aire de la section de l'espacement annulaire étant égale à l'aire de la section de l'alésage intérieur traversant le raccord.Preferably, the valve seat member has a valve seat having a cylindrical axial face and defining with a inner face of the valve body conduit an annular spacing allowing the passage of the extinguishing agent when the control valve flow rate is in the open position, the area of the spacing section annular being equal to the cross-sectional area of the through-bore the fitting.

De préférence, l'élément de siège de vanne est placé en aval de l'élément tubulaire coulissant, l'élément de siège de vanne comportant un siège de vanne ayant une face amont convexe, une face axiale cylindrique dont le diamètre extérieur est égal ou légèrement inférieur au diamètre intérieur de l'élément tubulaire coulissant et comportant une rainure circulaire recevant un joint réalisant l'étanchéité de la liaison entre l'élément tubulaire coulissant et le siège de vanne en position fermée de la vanne.Preferably, the valve seat member is downstream of the sliding tubular member, the valve seat member comprising a valve seat having a convex upstream face, an axial face cylindrical whose outer diameter is equal to or slightly less than inner diameter of the sliding tubular element and having a circular groove receiving a seal sealing the connection between the sliding tubular element and the valve seat in position closed of the valve.

De préférence, l'élément de siège de vanne comporte un diaphragme ayant la forme d'un disque ayant comme axe l'axe principal et une tige de maintien connectée à une face radiale aval dudit siège de vanne et au centre du diaphragme, le diaphragme ayant un diamètre extérieur ajusté au diamètre du conduit pour positionner l'élément de siège de vanne sur l'axe principal et comportant une pluralité d'orifices permettant le passage de l'agent extincteur.Preferably, the valve seat member has a diaphragm having the shape of a disc having as axis the main axis and a holding rod connected to a downstream radial face of said seat of valve and in the center of the diaphragm, the diaphragm having a diameter outside adjusted to the diameter of the duct to position the element of valve seat on the main axis and having a plurality of orifices allowing the passage of the extinguishing agent.

Dans un mode de réalisation, l'aire de la section de la pluralité d'orifices du diaphragme est égale à l'aire d'une section de l'espacement annulaire séparant la face axiale cylindrique du siège de vanne d'une face intérieure du conduit du corps de vanne.In one embodiment, the area of the section of the plurality of apertures of the diaphragm is equal to the area of a section of the annular spacing separating the cylindrical axial face of the seat of valve of an inner face of the valve body conduit.

De préférence, le diaphragme, la tige de maintien et le siège de vanne sont intégralement formés de manière à ne constituer qu'une seule pièce de préférence en matière plastique.Preferably, the diaphragm, the holding rod and the seat Valves are integrally formed so as to constitute only one only one piece preferably made of plastic.

De préférence, une pièce parmi le corps de vanne, le raccord, l'élément tubulaire coulissant, l'élément de siège de vanne et la buse est constituée d'un matériau plastique.Preferably, one of the valve body, the connection, the sliding tubular element, the valve seat element and the nozzle is made of a plastic material.

De préférence, l'élément tubulaire coulissant est contraint vers la position fermée par un ressort en appui contre une face radiale dudit élément tubulaire et contre une paroi aval annulaire dudit raccord.Preferably, the sliding tubular element is constrained towards the closed position by a spring bearing against a radial face of said tubular element and against an annular downstream wall of said coupling.

L'invention sera mieux comprise, et d'autres buts, détails, caractéristiques et avantages de celle-ci apparaítront plus clairement au cours de la description suivante d'un mode de réalisation particulier de l'invention, donné uniquement à titre illustratif et non limitatif, en référence aux dessins annexés. Sur ces dessins :

  • la figure 1 est une vue de côté de la soufflette d'extincteur selon le mode de réalisation actuellement préféré de la présente invention ;
  • la figure 2 est une vue en perspective des différents éléments devant être logés à l'intérieur du corps et formant la vanne de la soufflette ;
  • la figure 3 est une vue en coupe selon la ligne II-II de la figure 1, la vanne de contrôle de débit étant montrée en position fermée ; et,
  • la figure 4 est une vue en coupe selon la ligne II-II de la figure, 1 la vanne étant montrée en position ouverte.
The invention will be better understood, and other objects, details, features and advantages thereof will appear more clearly in the following description of a particular embodiment of the invention, given solely for illustrative purposes and not limiting, with reference to the accompanying drawings. On these drawings:
  • Figure 1 is a side view of the extinguisher gun according to the presently preferred embodiment of the present invention;
  • Figure 2 is a perspective view of the various elements to be housed inside the body and forming the valve of the blower;
  • Figure 3 is a sectional view along the line II-II of Figure 1, the flow control valve being shown in the closed position; and,
  • Figure 4 is a sectional view along the line II-II of the figure, 1 the valve being shown in the open position.

Les figures 1 à 4 représentent la soufflette de l'extincteur portatif selon l'invention dans le mode de réalisation actuellement préféré. D'une figure à l'autre, les mêmes chiffres de référence sont utilisés pour désigner les mêmes éléments. Le sens de l'écoulement de l'agent extincteur est indiqué par la flèche sur les figures 3 et 4. Cet écoulement permet de qualifier d'amont et d'aval les positions relatives des éléments constitutifs. Ainsi, l'amont correspond au côté gauche de la figure 1, alors que l'aval correspond au côté droit de la figure 1.Figures 1 to 4 show the gun of the extinguisher portable device according to the invention in the embodiment currently prefer. From one figure to another, the same reference numbers are used to designate the same elements. The direction of the flow of the extinguishing agent is indicated by the arrow in Figures 3 and 4. This flow qualifies as upstream and downstream the relative positions constituent elements. So, the upstream corresponds to the left side of the Figure 1, while the downstream corresponds to the right side of Figure 1.

Sur la figure 1, la soufflette 1 est vue de côté. Elle comporte un corps 2 d'axe A (dit axe principal), servant également de corps de vanne. En amont, un raccord 3 est couplé libre en rotation au corps 2 comme cela sera décrit plus bas en détail. En aval, une buse 4 est couplée au corps de vanne 2. Comme représenté sur les figures 3 et 4, différents types de buse 4 et 4' ayant des formes différentes peuvent être fixées, par exemple par vissage, au corps de vanne 2. Par ailleurs, la soufflette 1 est munie de moyens d'actionnement ayant, dans ce mode de réalisation particulier, la forme d'une gâchette 6.In Figure 1, the gun 1 is viewed from the side. It has a body 2 of axis A (called the main axis), also serving as a valve body. Upstream, a coupling 3 is coupled freely in rotation to the body 2 as this will be described below in detail. Downstream, a nozzle 4 is coupled to the valve body 2. As shown in Figures 3 and 4, different nozzle types 4 and 4 'having different shapes can be fixed by example by screwing, to the valve body 2. Furthermore, the blower 1 is provided with actuating means having, in this embodiment particular, the shape of a trigger 6.

Le corps 2, de préférence réalisé en matière plastique, comporte une crosse 7, par exemple en plastique. La périphérie 71 de la crosse 7 possède une forme ergonomique pour faciliter la préhension de la soufflette 1 par l'utilisateur. Avantageusement, afin de réduire les coûts en matière première et le poids de l'assemblage, la crosse 7 est évidée. Elle comporte simplement une entretoise 72 de renfort en X. Eventuellement, la crosse 7 peut être flanquée, sur chacun de ses côtés, de demi-coques (non représentées) en plastique.The body 2, preferably made of plastic material, has a butt 7, for example plastic. The periphery 71 of the Butt 7 has an ergonomic shape for easy gripping of the blow gun 1 by the user. Advantageously, in order to reduce raw material costs and the weight of the assembly, the butt 7 is recessed. It simply comprises a spacer 72 of X reinforcement. Optionally, the stock 7 can be flanked, on each of its sides, half-shells (not shown) of plastic.

Intérieurement, le corps 2 est traversé, de son extrémité amont à son extrémité aval, par un conduit 21 d'écoulement (figures 3 et 4) cylindrique, ayant pour axe l'axe principal A. Le conduit 21 comporte un alésage amont 211 de diamètre d et un alésage aval 212 de diamètre D plus important que le diamètre d. Le conduit 21 présente donc un épaulement 213 globalement situé au milieu du conduit 21.Internally, the body 2 is crossed, from its upstream end at its downstream end, by a flow conduit 21 (FIGS. 3 and 4) cylindrical, having axis axis A. A conduit 21 has a upstream bore 211 of diameter d and a downstream bore 212 of diameter D more important than the diameter d. The conduit 21 therefore has a shoulder 213 globally located in the middle of the conduit 21.

Logés à l'intérieur du conduit 21, le corps 2 comporte le raccord 3, un élément de siège de vanne 8 et une chemise 5 coulissante. Ces éléments sont représentés sur la figure 2 en perspective.Housed inside the conduit 21, the body 2 comprises the fitting 3, a valve seat member 8 and a sliding jacket 5. These elements are represented in FIG. 2 in perspective.

En se référant aux figures 3 et 4, le long de l'axe principal A, le raccord 3 comporte, intérieurement, un alésage 34 cylindrique de diamètre constant et, extérieurement, une portion amont 31, une portion intermédiaire 32 et une portion aval 33.Referring to FIGS. 3 and 4, along the main axis A, the 3 comprises, internally, a cylindrical bore 34 of constant diameter and, externally, an upstream portion 31, a portion intermediate 32 and a downstream portion 33.

La portion amont 31 est munie d'une pluralité de crans annulaires 311 faisant saillie radialement vers l'extérieur. Les crans 311 possèdent une section en forme de coin ayant une face radiale 312 et une face inclinée 313 depuis la périphérie de la face radiale 312 vers l'amont de la face radiale 312. Le rôle de la portion amont 31 est de permettre la connexion du raccord 3 à l'extrémité d'un tuyau souple dont l'autre extrémité est connectée au corps de l'extincteur portatif contenant l'agent extincteur. Lors de l'insertion de la portion amont 31 à l'intérieur de l'extrémité du tuyau souple (non représenté), la pluralité de crans annulaires 311 assurent la liaison sûre et étanche entre la soufflette 1 et le tuyau souple.The upstream portion 31 is provided with a plurality of notches annular projections 311 protruding radially outwardly. Notches 311 have a wedge-shaped section having a radial face 312 and a inclined face 313 from the periphery of the radial face 312 upstream of the radial face 312. The role of the upstream portion 31 is to allow the connection of the connector 3 to the end of a hose whose other end is connected to the body of the portable extinguisher containing the agent extinguisher. When inserting the upstream portion 31 into the interior of the end of the hose (not shown), the plurality of notches rings 311 ensure the safe and tight connection between the blow gun 1 and the hose.

La portion intermédiaire 32 est cylindrique et s'ajuste dans l'alésage amont 211. Le diamètre extérieur d32 de la portion intermédiaire 32 est donc légèrement inférieur à d. Chacune des extrémités de la portion intermédiaire 32 comporte une rainure annulaire 321 et 322 apte à recevoir respectivement un joint d'étanchéité torique.The intermediate portion 32 is cylindrical and fits into the upstream bore 211. The outer diameter d 32 of the intermediate portion 32 is slightly smaller than d. Each end of the intermediate portion 32 has an annular groove 321 and 322 adapted to respectively receive an O-ring seal.

La portion intermédiaire 32 est séparée de la portion amont 31 par une paroi amont 36 annulaire faisant saillie radialement vers l'extérieur. La paroi amont 36 possède une section en forme de cran orienté vers l'amont comme les crans 311 décrits ci-dessus. Le diamètre de la face radiale aval 362 est supérieur au rayon d de l'alésage amont 211 pour assurer le maintien en position relative du raccord 3 et du corps de vanne 2.The intermediate portion 32 is separated from the upstream portion 31 by an annular upstream wall 36 projecting radially towards outside. The upstream wall 36 has a shaped section upstream oriented like the notches 311 described above. The diameter of the downstream radial face 362 is greater than the radius d of the upstream bore 211 to maintain the relative position of the fitting 3 and the body valve 2.

La portion aval 33 est cylindrique de diamètre extérieur d33 et est logée à l'intérieur de l'alésage aval 212. L'extrémité de la portion aval 33 comporte extérieurement une rainure annulaire 331 apte à recevoir un joint d'étanchéité torique.The downstream portion 33 is cylindrical with an outside diameter d 33 and is housed inside the downstream bore 212. The end of the downstream portion 33 externally has an annular groove 331 capable of receiving an O-ring.

La portion aval 33 est séparée de la portion intermédiaire 32 par une paroi aval 35 annulaire faisant saillie radialement vers l'extérieur. La paroi aval 35 est de section rectangulaire et possède un diamètre d35 sensiblement égal ou inférieur à D.The downstream portion 33 is separated from the intermediate portion 32 by an annular downstream wall 35 projecting radially outwardly. The downstream wall 35 is of rectangular section and has a diameter 35 substantially equal to or less than D.

Pour positionner le raccord 3 dans le conduit 21, la portion amont 31 est insérée du côté de l'alésage aval 212 dans l'alésage amont 211, jusqu'à ce que la paroi amont 36 vienne en contact avec l'épaulement 213. Puis, la paroi amont 36 est déformée pour permettre d'enfoncer plus avant le raccord 3 dans le conduit 21. L'insertion continue jusqu'à ce que la paroi amont 36 débouche par l'extrémité amont du conduit 21 et que la paroi aval 35 vienne prendre appui sur l'épaulement 213 empêchant tout déplacement supplémentaire vers l'amont (vers la gauche sur la figure 1) du raccord 3 relativement au corps 2. La paroi amont 36 reprend alors élastiquement sa forme initiale. En particulier, sa face radiale 362 empêche tout mouvement vers l'aval (vers la droite sur la figure 1) du raccord 3 relativement au corps 2. Le raccord 3 est contraint axialement, mais est libre de tourner à l'intérieur du conduit 21. En position assemblée du raccord 3 dans le corps 2, les portions intermédiaire et aval 32 et 33 sont logées dans le corps 2, alors que la portion amont 31 émerge de l'extrémité amont du corps 2 de manière à être raccordée à un tuyau souple.To position the connector 3 in the duct 21, the portion upstream 31 is inserted on the side of the downstream bore 212 in the upstream bore 211, until the upstream wall 36 comes into contact with the shoulder 213. Then, the upstream wall 36 is deformed to allow to push forward the connector 3 in the duct 21. Inserting continues until the upstream wall 36 opens at the end upstream of the duct 21 and that the downstream wall 35 comes to bear on the shoulder 213 preventing any further movement to upstream (to the left in FIG. 1) of the connection 3 relative to the body 2. The upstream wall 36 then elastically resumes its initial shape. In particular, its radial face 362 prevents any downstream movement (to the right in FIG. 1) of connection 3 relative to body 2. The fitting 3 is axially constrained but is free to rotate inside 21. In the assembled position of the connector 3 in the body 2, the intermediate and downstream portions 32 and 33 are housed in the body 2, then that the upstream portion 31 emerges from the upstream end of the body 2 of to be connected to a hose.

L'élément de siège de vanne 8 est constitué d'un siège de vanne 81, d'un diaphragme 83 ayant la forme d'un disque de diamètre d83, et d'un axe cylindrique de liaison 82. Avantageusement, l'élément de siège de vanne 8 est réalisé par moulage d'une matière plastique afin de former une seule pièce.The valve seat member 8 is constituted by a valve seat 81, a diaphragm 83 having the shape of a disk of diameter d 83 , and a cylindrical connecting shaft 82. Advantageously, the element valve seat 8 is made by molding a plastic material to form a single piece.

Le siège de vanne 81 comporte une face amont convexe 811, une face axiale 812 ayant un diamètre d81 et une face aval 813 radiale. La face axiale 812 est munie extérieurement d'une rainure annulaire 814 apte à recevoir un joint d'étanchéité torique.The valve seat 81 has a convex upstream face 811, an axial face 812 having a diameter d 81 and a downstream face 813 radial. The axial face 812 is provided externally with an annular groove 814 capable of receiving an O-ring.

Comme visible sur la figure 2, le diaphragme 83 est muni d'orifices traversants 834 en forme de quadrant définissant une entretoise 835 maintenant une périphérie extérieure annulaire 836 ayant un diamètre inférieur au diamètre D de l'alésage aval 212. L'axe de liaison 82 permet de relier le centre de la face aval 813 du siège de vanne 81 au centre du disque que constitue le diaphragme 83. Le diaphragme 83 est positionné dans un évidemment annulaire 214 pratiqué dans le conduit 21 au niveau de l'embouchure aval du corps 2. L'élément de siège de vanne 8 positionné dans l'évidemment annulaire 214 est maintenu en position par la buse 4. Le diaphragme 83 permet de positionner correctement le siège de vanne 81 le long de l'axe principal A.As can be seen in FIG. 2, the diaphragm 83 is provided with through holes 834 quadrant-shaped defining a spacer 835 now an annular outer periphery 836 having a diameter smaller than the diameter D of the downstream bore 212. The link axis 82 makes it possible to connect the center of the downstream face 813 of the valve seat 81 to the center of the disk that constitutes the diaphragm 83. The diaphragm 83 is positioned in an obviously annular 214 practiced in the duct 21 at the downstream mouth of the body. 2. The seat element of valve 8 positioned in the annular cavity 214 is maintained in position by the nozzle 4. The diaphragm 83 allows to position correctly the valve seat 81 along the main axis A.

Avantageusement, la surface de la section de l'espacement annulaire défini entre la surface axiale extérieure 812 du siège de vanne 81 et la paroi de l'alésage aval 212 est égale à la surface de la section de l'alésage 34 traversant le raccord 3, et à la section de passage du diaphragme 83.Advantageously, the surface of the section of the spacing ring defined between the outer axial surface 812 of the valve seat 81 and the wall of the downstream bore 212 is equal to the surface of the section of the bore 34 passing through the connection 3, and the passage section of the diaphragm 83.

La chemise 5 est un élément tubulaire coulissant. Extérieurement, les dimensions de la chemise 5 sont ajustées au diamètre D de l'alésage aval 212. La face axiale extérieure 53 comporte une rainure circulaire 54 apte à recevoir un joint d'étanchéité rendant étanche la liaison entre l'élément tubulaire coulissant 5 et le corps 2. De plus, la face axiale extérieure 53 comporte deux ergots 51 et 52, diamétralement opposés, faisant saillie radialement vers l'extérieur. En position assemblée de l'élément tubulaire coulissant 5 à l'intérieur du corps 2, les ergots 51 et 52 traversent des lumières pratiquées dans le corps 2 et situées dans un plan orthogonal à la crosse 7 contenant l'axe principal A. Intérieurement, la chemise 5 comporte un alésage intérieur 56 d'un diamètre d5. L'arête entre l'alésage intérieur 56 et une face radiale aval 57 est chanfreinée de manière à munir l'embouchure aval d'une face inclinée 58 dont le diamètre augmente dans le sens de l'écoulement. En amont, la chemise 5 s'ajuste autour de l'extrémité aval du raccord 3. Le diamètre d5 est donc légèrement supérieur ou égal au diamètre d33. Le joint torique maintenu dans la rainure 331 assure l'étanchéité de la liaison entre la chemise 5 coulissante et le raccord 3. En aval, la chemise 5 est destinée à s'ajuster au siège de vanne 81 de manière à obturer, dans une position fermée de la vanne de contrôle de débit, le passage d'écoulement constitué par l'espacement annulaire entourant la face axiale 812 du siège de vanne 81. L'alésage intérieur 56 reçoit donc le siège de vanne 81. En conséquence, d5 est égal ou légèrement supérieur au diamètre d81. La liaison entre le siège de vanne 81 et la chemise 5 est rendu étanche, en position fermée de la vanne, par le joint torique positionné dans la rainure 814.The jacket 5 is a sliding tubular element. Externally, the dimensions of the liner 5 are adjusted to the diameter D of the downstream bore 212. The outer axial face 53 has a circular groove 54 adapted to receive a seal sealing the connection between the sliding tubular element 5 and the body 2. In addition, the outer axial face 53 has two lugs 51 and 52, diametrically opposed, projecting radially outwardly. In the assembled position of the sliding tubular element 5 inside the body 2, the lugs 51 and 52 pass through holes made in the body 2 and situated in a plane orthogonal to the butt 7 containing the main axis A. Internally, the liner 5 has an inner bore 56 having a diameter d 5 . The edge between the inner bore 56 and a downstream radial face 57 is chamfered so as to provide the downstream mouth with an inclined face 58 whose diameter increases in the direction of flow. Upstream, the liner 5 fits around the downstream end of the fitting 3. The diameter d 5 is therefore slightly greater than or equal to the diameter d 33 . The O-ring held in the groove 331 seals the connection between the sliding jacket and the connector 3. Downstream, the liner 5 is adapted to fit the valve seat 81 so as to seal, in a position closed of the flow control valve, the flow passage constituted by the annular space surrounding the axial face 812 of the valve seat 81. The inner bore 56 thus receives the valve seat 81. Accordingly, d 5 is equal to or slightly greater than the diameter d 81 . The connection between the valve seat 81 and the liner 5 is sealed, in the closed position of the valve, by the O-ring positioned in the groove 814.

Un ressort 9 est positionné dans le corps 2 de manière à ce qu'une de ses extrémités vienne prendre appui sur la paroi aval 35 et que l'autre de ses extrémités vienne prendre appui sur une face radiale amont 59 de la chemise 5. En conséquence, la chemise 5 est contrainte par le ressort 9 contre l'élément de siège de vanne 8 dans une position par défaut dans laquelle la vanne de contrôle de débit est fermée (figure 3). Dans le mode de réalisation décrit, la face radiale aval 57 vient alors prendre appui contre le diaphragme 83. Incidemment, la face chanfreinée 58 permet de positionner axialement la chemise 5 relativement au siège de vanne 81 lors de la fermeture de la vanne.A spring 9 is positioned in the body 2 so that that one of its ends comes to bear on the downstream wall 35 and that the other of its ends comes to bear on an upstream radial face 59 of the jacket 5. As a result, the jacket 5 is constrained by the spring 9 against the valve seat member 8 in a position by fault in which the flow control valve is closed (Figure 3). In the embodiment described, the downstream radial face 57 then take support against the diaphragm 83. Incidentally, the chamfered face 58 makes it possible to position the jacket 5 axially relative to the seat valve 81 when closing the valve.

La gâchette 6 comporte une portion d'actionnement 61 de forme globalement rectangulaire, placée au-dessous du corps 2 et en avant de la crosse 7, et deux bras latéraux 62 et 63 faisant saillie parallèlement à deux côtés opposés de la portion d'actionnement et venant de part et d'autre du corps 2. Les extrémités libres de chacun des bras latéraux 62 et 63 opposées aux extrémités reliées à la portion d'actionnement 61 sont respectivement munies d'un trou 64 et 65. Un pivot 66 est monté entre les extrémités libres des deux bras latéraux 62 et 63 à l'intérieur des trous 64 et 65. Le pivot 66 est logé dans un alésage pratiqué dans le corps de vanne 2 le long d'un axe de pivotement situé hors de l'axe principal A dans un plan perpendiculaire à celui-ci. Chacun des bras latéraux 62 et 63 comporte également, au voisinage de son point milieu, un orifice 68 et 69 traversant de forme oblongue, dont le grand axe est orienté dans la longueur du bras latéral. Ces orifices oblongs 68 et 69 permettent de maintenir et d'entraíner les ergots 51 et 52 de la chemise 5 émergeant latéralement du corps 2.The trigger 6 comprises an actuating portion 61 of generally rectangular shape, placed below the body 2 and in before the butt 7, and two lateral arms 62 and 63 protruding parallel to two opposite sides of the actuating portion and coming from either side of the body 2. The free ends of each of the lateral arms 62 and 63 opposite to the ends connected to the portion 61 are respectively provided with a hole 64 and 65. pivot 66 is mounted between the free ends of the two lateral arms 62 and 63 inside the holes 64 and 65. The pivot 66 is housed in a bore practiced in the valve body 2 along a pivot axis located off the main axis A in a plane perpendicular to it. Each lateral arms 62 and 63 also have, in the vicinity of its point middle, an orifice 68 and 69 passing oblong, the large axis is oriented in the length of the lateral arm. These oblong holes 68 and 69 allow to maintain and drive the pins 51 and 52 of the shirt 5 emerging laterally from the body 2.

Selon cet assemblage, la gâchette 6 peut être déplacée par rotation autour de l'axe du pivot 66 par la pression du doigt de l'utilisateur appliquant une force extérieure sur la partie inférieure 61. Les bras latéraux 62 et 63 en pivotant entraínent, via la liaison couplant les orifices oblongs 68 et 69 aux ergots 51 et 52, la chemise 5 en translation selon l'axe principal A à l'écart de l'élément de siège de vanne 8. L'agent extincteur peut alors s'écouler au-delà du siège de vanne 8. La vanne de contrôle de débit est dans une position ouverte.According to this assembly, the trigger 6 can be moved by rotation about the axis of the pivot 66 by the pressure of the finger of the user applying an external force on the lower part 61. The lateral arms 62 and 63 pivotally drive, via the coupling link the oblong holes 68 and 69 with the lugs 51 and 52, the liner 5 translation along the main axis A away from the valve seat element 8. The extinguishing agent may then flow past the valve seat 8. Flow control valve is in an open position.

Après actionnement, lorsque l'utilisateur relâche la force qu'il exerce, la force exercée par le ressort 9 permet de contraindre la vanne de contrôle de débit en position fermée en déplaçant la chemise 5 vers le siège de vanne 81. Les ergots 51 et 52 entraínent alors les bras latéraux 62 et 63 et permettent à la gâchette 6 de reprendre sa position initiale.After actuation, when the user releases the force he exerts, the force exerted by the spring 9 makes it possible to constrain the valve in the closed position by moving the liner 5 towards the valve seat 81. The lugs 51 and 52 then drive the lateral arms 62 and 63 and allow the trigger 6 to return to its original position.

Avantageusement, le raccord 3, la buse 4 ainsi que la chemise 5 coulissante sont réalisés dans une matière plastique.Advantageously, the coupling 3, the nozzle 4 and the shirt 5 sliding are made of a plastic material.

La soufflette décrite ci-dessus peut donc être qualifiée par la présence d'une douille mobile et d'un tiroir fixe. Un tel arrangement présente l'avantage de n'engendrer que de faibles pertes de charge le long du chemin d'écoulement du fluide et donc d'exhiber une grande linéarité du débit en fonction de la course d'actionnement de la gâchette. Par ailleurs, un tel arrangement n'est peu ou pas sujet à l'encrassement au cours du temps, ce qui assure une bonne étanchéité tout au long de l'utilisation de la soufflette.The blower described above can therefore be qualified by the presence of a movable sleeve and a fixed drawer. Such an arrangement has the advantage of generating only low pressure losses along of the flow path of the fluid and thus exhibit a high linearity the flow rate as a function of the actuating stroke of the trigger. By elsewhere, such an arrangement is little or not subject to fouling course of time, which ensures a good seal throughout the use of the blow gun.

Bien que l'invention ait été décrite en liaison avec un mode de réalisation particulier, il est bien évident qu'elle n'y est nullement limitée et qu'elle comprend tous les équivalents techniques des moyens décrits ainsi que leurs combinaisons si celles-ci entrent dans le cadre de l'invention.Although the invention has been described in connection with a mode of particular achievement, it is obvious that it is by no means and that it includes all the technical equivalents of the means described as well as their combinations if these fall within the scope of the invention.

Claims (10)

Extincteur portatif muni d'une soufflette (1) formant vanne de contrôle de débit d'un agent extincteur contenu dans un corps dudit extincteur, ladite soufflette comportant un corps de vanne (2) muni d'un conduit (21) reliant une extrémité amont et une extrémité aval dudit corps de vanne selon un axe principal (A) ; un raccord (3) amont comportant un alésage (34) cylindrique traversant, couplé audit corps de vanne et auquel est raccordé un tuyau souple alimentant ladite souflette en agent extincteur ; une buse (4) aval couplée audit corps de vanne et expulsant ledit agent extincteur ; un élément de siège de vanne (8) fixe disposé axialement dans ledit conduit (21) dudit corps de vanne ; un élément tubulaire (5) coulissant axialement disposé axialement dans ledit conduit dudit corps de vanne en alignement axial avec ledit élément de siège de vanne ; et, des moyens d'actionnement permettant de déplacer ledit élément tubulaire entre une position fermée dans laquelle ledit élément tubulaire est en engagement étanche avec ledit élément de siège de vanne et une position ouverte dans laquelle ledit élément tubulaire se trouve à l'écart dudit élément de siège de vanne afin de permettre l'écoulement dudit agent extincteur au-delà dudit élément de siège de vanne, caractérisé en ce que ledit raccord est couplé contraint axialement mais libre en rotation relativement audit corps de vanne, en ce que ledit corps de vanne comporte des moyens de préhension ayant la forme d'une crosse (7) et en ce que lesdits moyens d'actionnement sont constitués par une gâchette (6) apte à pivoter sous l'action d'une force extérieure autour d'un pivot (66) situé hors dudit axe principal dans un plan perpendiculaire à ce dernier.Portable fire extinguisher provided with a blower (1) forming a flow control valve of an extinguishing agent contained in a body of said fire extinguisher, said blower comprising a valve body (2) provided with a duct (21) connecting an upstream end and a downstream end of said valve body along a main axis (A); an upstream fitting (3) having a through-bore (34) therethrough, coupled to said valve body and to which is connected a hose supplying said slug with extinguishing agent; a downstream nozzle (4) coupled to said valve body and expelling said extinguishing agent; a stationary valve seat member (8) axially disposed in said conduit (21) of said valve body; an axially slidable tubular member (5) axially disposed in said conduit of said valve body in axial alignment with said valve seat member; and, actuating means for moving said tubular member between a closed position in which said tubular member is in sealing engagement with said valve seat member and an open position in which said tubular member is away from said member valve seat assembly for allowing said extinguishing agent to flow past said valve seat member, characterized in that said coupling is axially constrained but freely rotatable relative to said valve body, in that said valve body comprises gripping means having the shape of a butt (7) and in that said actuating means consist of a trigger (6) able to pivot under the action of an external force around a pivot ( 66) located off said main axis in a plane perpendicular thereto. Extincteur portatif selon la revendication 1, caractérisé en ce que ledit raccord (3) possède une portion aval (33) tubulaire positionnée à l'intérieur dudit conduit (21) et dont l'extrémité aval est logée à l'intérieur dudit élément tubulaire (5), et en ce que ladite portion aval dudit raccord comporte extérieurement une rainure circulaire (331) recevant un joint assurant l'étanchéité de la liaison entre ledit raccord (3) et ledit élément tubulaire (5) coulissant.Portable fire extinguisher according to claim 1, characterized in that said connector (3) has a tubular downstream portion (33) positioned inside said duct (21) and whose downstream end is housed inside said tubular element ( 5), and in that said downstream portion of said connection has externally a circular groove (331) receiving a seal ensuring the sealing of the connection between said connection (3) and said tubular member (5) sliding. Extincteur selon la revendication 1 ou la revendication 2, caractérisé en ce que ledit élément tubulaire (5) coulissant comporte extérieurement deux ergots diamétralement opposés faisant saillie radialement vers l'extérieur, en ce que le corps de vanne (2) comporte des lumières recevant lesdits ergots, et en ce que ladite gâchette (6) comporte deux bras latéraux (62, 63) munis de trous oblongs (68, 69) coopérant respectivement avec lesdits ergots de manière à entraíner le coulissement axial dudit élément tubulaire (5) lorsque ladite gâchette est actionnée en pivotement.Fire extinguisher according to claim 1 or claim 2, characterized in that said sliding tubular element (5) externally comprises two diametrically opposed lugs protruding radially outwards, in that the valve body (2) comprises slots receiving said lugs, and in that said trigger (6) comprises two lateral arms (62, 63) provided with oblong holes (68, 69) cooperating respectively with said lugs so as to cause axial sliding of said tubular element (5) when said trigger is pivoted. Extincteur selon l'une des revendications 1 à 3, caractérisé en ce que ledit élément de siège de vanne (8) comporte un siège de vanne (81) ayant une face axiale (812) cylindrique et définissant avec une face intérieure dudit conduit (21) dudit corps de vanne (2) un espacement annulaire permettant le passage dudit agent extincteur lorsque ladite vanne de contrôle de débit est en position ouverte, l'aire de la section dudit espacement annulaire étant égale à l'aire de la section de l'alésage intérieur (34) traversant ledit raccord (3).Extinguisher according to one of claims 1 to 3, characterized in that said valve seat member (8) comprises a valve seat (81) having an axial face (812) cylindrical and defining with an inner face of said duct (21). ) of said valve body (2) an annular spacing permitting passage of said extinguishing agent when said flow control valve is in an open position, the area of the section of said annular spacing being equal to the area of the section of the inner bore (34) passing through said fitting (3). Extincteur selon l'une des revendications 1 à 4, caractérisé en ce que ledit élément de siège de vanne (8) est placé en aval dudit élément tubulaire (5) coulissant, en ce que ledit élément de siège de vanne (8) comporte un siège de vanne (81) ayant une face amont convexe (811), une face axiale (812) cylindrique dont le diamètre extérieur est égal ou légèrement inférieur au diamètre intérieur (d5) dudit élément tubulaire (5) coulissant et comportant une rainure circulaire (814) recevant un joint réalisant l'étanchéité de la liaison entre ledit élément tubulaire (5) coulissant et ledit siège de vanne (81) en position fermée de ladite vanne.Fire extinguisher according to one of claims 1 to 4, characterized in that said valve seat element (8) is placed downstream of said sliding tubular element (5), in that said valve seat element (8) comprises a valve seat (81) having a convex upstream face (811), a cylindrical axial face (812) whose outside diameter is equal to or slightly smaller than the inside diameter (d 5 ) of said sliding tubular element (5) and having a circular groove (814) receiving a seal sealing the connection between said tubular member (5) sliding and said valve seat (81) in the closed position of said valve. Extincteur selon la revendication 4 ou la revendication 5, caractérisé en ce que ledit élément de siège de vanne (8) comporte un diaphragme (83) ayant la forme d'un disque ayant comme axe ledit axe principal (A) et une tige de maintien (82) connectée à une face radiale aval (813) dudit siège de vanne (81) et au centre dudit diaphragme, ledit diaphragme ayant un diamètre extérieur (d83) ajusté au diamètre du conduit (21) pour positionner ledit élément de siège de vanne sur ledit axe principal et comportant une pluralité d'orifices (834) permettant le passage dudit agent extincteur.Fire extinguisher according to claim 4 or claim 5, characterized in that said valve seat member (8) has a disk-shaped diaphragm (83) having as its axis said main axis (A) and a holding rod (82) connected to a downstream radial face (813) of said valve seat (81) and at the center of said diaphragm, said diaphragm having an outer diameter (d 83 ) fitted to the diameter of the conduit (21) for positioning said seat member of valve on said main axis and having a plurality of orifices (834) allowing the passage of said extinguishing agent. Extincteur selon la revendication 6, caractérisé en ce que l'aire de la section de la pluralité d'orifices (834) dudit diaphragme (83) est égale à l'aire de la section de l'espacement annulaire séparant ladite face axiale (812) cylindrique dudit siège de vanne (81) de la face intérieure dudit conduit (21) dudit corps de vanne (2).Fire extinguisher according to claim 6, characterized in that the area of the section of the plurality of orifices (834) of said diaphragm (83) is equal to the area of the section of the annular space between said axial face (812 ) cylindrical of said valve seat (81) of the inner face of said duct (21) of said valve body (2). Extincteur selon la revendication 6 ou la revendication 7, caractérisé en ce que ledit diaphragme (83), ladite tige de maintien (82) et ledit siège de vanne (81) sont intégralement formés de manière à ne constituer qu'une seule pièce de préférence en matière plastique.Fire extinguisher according to claim 6 or claim 7, characterized in that said diaphragm (83), said holding rod (82) and said valve seat (81) are integrally formed so as to constitute a single piece preferably made of plastic Extincteur selon l'une des revendications 1 à 8, caractérisé en ce qu'une pièce parmi ledit corps de vanne (2), ledit raccord (3), ledit élément tubulaire (5) coulissant, ledit élément de siège de vanne (8) et ladite buse (4), est constituée d'un matériau plastique.Fire extinguisher according to one of Claims 1 to 8, characterized in that one of said valve body (2), said coupling (3), said tubular element (5) is slidable, said valve seat element (8) and said nozzle (4) is made of a plastic material. Extincteur selon l'une des revendications 1 à 9, caractérisé en ce que ledit élément tubulaire (5) coulissant est contraint vers la position fermée par un ressort (9) en appui contre une face radiale (59) dudit élément tubulaire (5) et contre une paroi aval (35) annulaire dudit raccord (3).Fire extinguisher according to one of claims 1 to 9, characterized in that said tubular element (5) sliding is forced towards the closed position by a spring (9) bearing against a radial face (59) of said tubular element (5) and against an annular downstream wall (35) of said coupling (3).
EP04292467A 2003-11-14 2004-10-18 Portable fire extinguisher with extinguishing gun acting as a flow control valve Withdrawn EP1530984A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0313356A FR2862228B1 (en) 2003-11-14 2003-11-14 PORTABLE EXTINGUISHER HAVING A BLOW GUN PLAYING THE ROLE OF FLOW CONTROL VALVE
FR0313356 2003-11-14

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EP1530984A1 true EP1530984A1 (en) 2005-05-18

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1061947A (en) * 1952-05-16 1954-04-16 Spray gun for powders or liquids
US4664313A (en) * 1985-06-03 1987-05-12 Rikizo Yoneda Water ejecting gun
EP0315872A2 (en) * 1987-11-09 1989-05-17 ARAG S.p.A. A gun, particularly for crop-spraying
WO1999064111A1 (en) * 1998-06-05 1999-12-16 Fabryka Sprzetu Ratunkowego I Lamp Górniczych 'faser' S.A. Extinguishing pulse gun

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE555295A (en) *
US589439A (en) 1897-09-07 Rubbish-conveyer attachment for harvesters
FR2333526A1 (en) * 1975-12-03 1977-07-01 Protection Incendie Ste Gle Pistol head for powder or liq. type extinguisher - has hand operated trigger and in line flow without change of direction
FR2441394A2 (en) * 1978-11-17 1980-06-13 Murray Gaston Trigger valve for fire extinguisher gun - has metal liner with seals for valve rod operation and conical chamber for dispersion head
DE19937755A1 (en) * 1999-08-10 2001-03-08 Anton Neumeir Portable extinguisher unit contains two separate spherical containers, gas-container, valves, filler sockets with lids, frame, breathing tube and mask.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1061947A (en) * 1952-05-16 1954-04-16 Spray gun for powders or liquids
US4664313A (en) * 1985-06-03 1987-05-12 Rikizo Yoneda Water ejecting gun
EP0315872A2 (en) * 1987-11-09 1989-05-17 ARAG S.p.A. A gun, particularly for crop-spraying
WO1999064111A1 (en) * 1998-06-05 1999-12-16 Fabryka Sprzetu Ratunkowego I Lamp Górniczych 'faser' S.A. Extinguishing pulse gun

Also Published As

Publication number Publication date
FR2862228B1 (en) 2006-01-27
FR2862228A1 (en) 2005-05-20

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