EP0653603B1 - Vorrichtung zum gleichzeitigen Ausstossen von zwei Flüssigkeiten, insbesondere pyrotechnischen Flüssigkeiten - Google Patents

Vorrichtung zum gleichzeitigen Ausstossen von zwei Flüssigkeiten, insbesondere pyrotechnischen Flüssigkeiten Download PDF

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Publication number
EP0653603B1
EP0653603B1 EP94401273A EP94401273A EP0653603B1 EP 0653603 B1 EP0653603 B1 EP 0653603B1 EP 94401273 A EP94401273 A EP 94401273A EP 94401273 A EP94401273 A EP 94401273A EP 0653603 B1 EP0653603 B1 EP 0653603B1
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EP
European Patent Office
Prior art keywords
face
piston
axis
fluids
cylinder
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EP94401273A
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English (en)
French (fr)
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EP0653603A1 (de
Inventor
Geneviève Leichter
Hervé Tustes
Marie-Jeanne Ruiz
Jean-Pierre Rosada
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Etienne LaCroix Tous Artifices SA
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Etienne LaCroix Tous Artifices SA
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B4/00—Fireworks, i.e. pyrotechnic devices for amusement, display, illumination or signal purposes
    • F42B4/26—Flares; Torches
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/36—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
    • F42B12/46—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information for dispensing gases, vapours, powders or chemically-reactive substances

Definitions

  • Such a device is described for example in Canadian patent application No. 2 027 254, the description of which describes the characteristics of the preamble of independent claim 1, in the form of an infrared decoy using, as first and second fluids, respectively oxygen under pressure and a pyrophoric liquid which, mixed with the aforementioned oxygen after ejection, ignites spontaneously to cause the desired infrared emission.
  • the first tank is therefore constituted by a pressurized oxygen tank which the controlled opening of a valve allows on the one hand to eject in the open air via the first conduit and the first nozzle, and on the other hand to introduce into the second reservoir which contains the pyrophoric liquid not directly, but via a flexible bladder opening onto the second conduit.
  • the oxygen introduced into the second tank drives out the pyrophoric liquid which it contains, by the second conduit and the second nozzle, so that oxygen, on the one hand, and the pyrophoric liquid, on the other hand, are ejected simultaneously and only mix, to react, outside the device.
  • the pressure of oxygen in the first tank varies considerably as this oxygen is ejected, while this pressure conditions the distribution of this oxygen between the second tank, where it acts as an agent. expelling pyrophoric liquid, and the first leads at the outlet of which it plays its role of oxidizing agent of this pyrophoric liquid, as well as the pressure and the ejection rate of the pyrophoric liquid and oxygen, so that the infrared emission of such a device has a completely random character, and great instability over time.
  • the object of the present invention is to remedy these drawbacks and, to this end, it proposes a device of the type indicated in the preamble, characterized in that the first and second reservoirs are constituted by first and second coaxial cylinders closed towards the downstream, with reference to the same determined axial direction, by a respective bottom into which the first or second conduit opens respectively, and in that the controlled means for simultaneous expulsion of the first and second fluids comprise first and second pistons mounted for sliding axial, at least in said direction, inside the first and second cylinders, respectively, and closing the first and second cylinders, respectively, upstream with reference to said direction, the second piston being mechanically coupled to the first piston of such so that a sliding of the first piston in said direction, inside the first cylinder, causes the sliding t of the second piston in said direction inside the second cylinder, and means controlled to cause the sliding of the first piston in said direction inside the first cylinder.
  • the device according to the invention is preferably produced so that it comprises at least two sealed sub-assemblies mutually separated in a state of storage and mutually assembled in a state of use, on the basis of a first sub-assembly grouping the first cylinder, containing the first fluid, the corresponding bottom and the first piston and a second sub- assembly grouping the second cylinder containing the second fluid, the corresponding bottom, and the second piston.
  • the first and second sub-assemblies preloaded respectively with first and second fluids, can thus be stored on separate areas, under conditions such that any accidental mixing between the first and second fluids is excluded, so as not to be assembled only at the time of use; the third sub-assembly, if any, can also be stored under optimum safety conditions so that it is not assembled with the other two sub-assemblies until during use, which is particularly advantageous when, according to a preferred embodiment, the means controlled to cause the sliding of the first piston include a pyrotechnic generator of pressurized gas, acting on the first piston in the first cylinder, opposite the first fluid.
  • the relative positioning of the first and second cylinders as well as of the means controlled to cause the sliding of the first piston can be freely chosen by a person skilled in the art, according to the conditions of implantation of the device and consequently of the external shape which one can give it, and usual dimensions of the devices that this device according to the invention is called upon to replace.
  • the first and second cylinders can be arranged one inside the other, and for example placing the second cylinder around the first cylinder itself surrounding, at least partially, the means controlled to cause the sliding of the first piston.
  • the device according to the invention with more space along its axis than perpendicular to it, as is frequently the case with decoy devices, and to this end provide that the means controlled to cause the sliding of the first piston, the first cylinder and the second cylinder are mutually aligned axially in the said direction this line arrangement is particularly favorable when the device according to the invention is produced from two or three sub-assemblies assembled at the time of use, although such an embodiment in several sub-assemblies is also possible when at least the first and second cylinders are arranged one inside the other.
  • Sealing of the rod vis-à-vis the bottom of the first cylinder can indeed be carried out easily, and one can easily size the rod, on the one hand, and the second piston, on the other hand, so that the mutual assembly of the two sub-assemblies automatically results in a stop of the rod in said direction against the second piston, so that any subsequent movement of the first piston in said direction, inside the first cylinder, under the action of the controlled means provided for this purpose translates coercively into an identical movement of the second piston inside the second cylinder.
  • the rod before the actuation of the means controlled to cause the sliding of the first piston in said direction inside the first cylinder, the rod respects vis-à-vis the second piston a calibrated clearance, such as in a first time of movement of the first piston in said direction inside the first cylinder, accompanied by the start of expulsion of the first fluid, the second piston remains stationary in the second cylinder and therefore does not cause expulsion of the second fluid; it is only after the clearance in question has been crossed by the first piston that the two pistons begin to move in unison, to simultaneously cause the expulsion of the first and second fluids out of the first and second cylinders.
  • the latter comprises, at the mouth of each of the first and second conduits in the respectively corresponding bottom, a normally closed valve, of predetermined characteristics, opening towards the first or second conduit, respectively, when the pressure in the first or second cylinder, respectively, exceeds a predetermined threshold.
  • the conformation and, possibly, the adjustment of the nozzles as well as the characteristics of the means controlled to cause the sliding of the first piston also constitute factors for determining the conditions of ejection of the first and second fluids, and consequently of their reaction. , as will easily be understood by a person skilled in the art who will make the choices best suited to each case in these two respects.
  • the single figure shows a view, in axial section, of an infrared decoy produced in accordance with the present invention and using on the one hand a pyrophoric fluid 1, which is highly reducing, and on the other hand an oxidizing fluid 2, of a natural respective known to a person skilled in the art and for example liquids.
  • a pyrophoric fluid 1 which is highly reducing
  • an oxidizing fluid 2 of a natural respective known to a person skilled in the art and for example liquids.
  • This device is produced by mutual assembly, during use, of two sub-assemblies 3 and 4 respectively containing the pyrophoric fluid 1 and the oxidizing fluid 2 and of a sub-assembly 5.
  • These three sub-assemblies 3, 4 , 5 are mutually separate and stored separately in a state of rest of the device, it being understood that the latter could also be produced differently, and in particular in the form of a single assembly, stored ready for use.
  • This subassembly 4 essentially consists of a tubular body 6 and a piston 7 housed inside the latter, both having a general shape of revolution around the same axis 8 along which the subsets 3, 4, 5 follow one another in this order and which defines for each of them an axis of general symmetry of revolution, if one refers to the state of use, illustrated, in which the three subsets 3, 4, 5 are mutually assembled.
  • Axis 8 defines a longitudinal direction which will serve subsequently as a reference to the notions of longitudinality and transversality; in addition, a determined direction 9 of the axis 8 will serve as a reference, thereafter, to concepts of upstream and downstream.
  • the tubular body 10 In the direction of a distance with respect to the axis 8, the tubular body 10 is delimited by an outer peripheral face 10 cylindrical of revolution around this axis and extending longitudinally from an upstream transverse end 11 of the subassembly 4 to a downstream transverse end 12 thereof. In the immediate vicinity of the upstream transverse end 11, the outer peripheral face 10 of the tubular body 6 has a thread 13 of axis 8, with a view to assembling the sub-assembly 5 to the sub-assembly 4, as will appear more far.
  • the outer peripheral face 10 of the latter is connected to an annular face, respective plane, of revolution around the axis 8 to which it is perpendicular, namely respectively a face 14 facing upstream and a face 15 facing downstream.
  • this transverse face 14, 15 is itself connected to a respective inner peripheral face 16, 17, cylindrical of revolution around the axis 8 and turned towards it. this.
  • the inner peripheral face 17, adjoining the downstream transverse face 15, extends longitudinally over a little less than half the longitudinal dimension of the tubular body 6 between the faces 14 and 15, upstream, up to a transverse face 18, flat, annular of revolution around the axis 8 to which it is perpendicular.
  • This face 18 faces upstream and thus extends from face 17 towards the axis 8.
  • a vent passage 19 is arranged radially, with reference to the axis 8, between the inner peripheral face 17 and the outer peripheral face 10.
  • the face 18 is connected to an inner peripheral face 22 of the tubular body 6, which is cylindrical of revolution around the axis 8 and turned towards it, with a diameter less than that of the face 17 in particular.
  • This inner peripheral face 22 is hollowed out of an annular groove 23 of revolution around the axis 8, open towards the latter and housing a seal 24 vis-à-vis a longitudinal, axial rod 48 of the piston 7 , which will be described later.
  • the faces 18, 22, 25 define inside the tubular body 6 an annular flange 26, continuous, projecting towards the axis 8, approximately half of the longitudinal dimension of the tubular body 6 between its end faces 14 and 15 .
  • the face 25 thus connects the face 22, in the direction of a distance with respect to the axis 8, to an inner peripheral face 27 of the tubular body 6, which face 27 is cylindrical of revolution around the axis 8, towards which it is turned, and has a diameter greater than the respective diameter of the inner peripheral faces 22 and 17 but less than that of the inner peripheral face 16.
  • this face 27 extends longitudinally upstream over a little less than half the longitudinal dimension of the tubular body 6 between its end faces 14 and 15, and is connected to the inner peripheral face 16 by an annular, plane face 28 of revolution about the axis 8 to which it is perpendicular, which face 28 is turned downstream.
  • the face 27 of the tubular body 6 defines a cylinder in which the piston 7 is housed coaxially and can slide longitudinally, and whose face 25 defines the bottom; the conduit 20 opens upstream in this bottom face 25, by means of a valve 29 housed in a cavity 30 formed in the flange 26 and constituting a localized enlargement of the conduit 20 in the immediate vicinity of its mouth 31 in face 25.
  • This valve 29, of a normally closed type and opening when an overpressure exceeding a predetermined threshold appears at the mouth 31 of the conduit 20, relative to the rest of this conduit 20, has been illustrated by way of example. nonlimiting in the form of a valve comprising a ball 32 housed inside the cavity 30 and that a helical spring 33, longitudinal, also housed inside the cavity 30, urges elastically upstream to tension to apply it to an annular seat 34 bordering the mouth 31.
  • valve 29 could naturally be admitted without departing from the scope of the present invention.
  • the piston 7 has on the one hand, in contact with the inner peripheral face 27 of the tubular body 6, an outer peripheral face 35 cylindrical of revolution around the axis 8 with a diameter corresponding substantially to that of the inner peripheral face 27, and on the other hand, in contact with the inner peripheral face 22 of the tubular body 6, an outer peripheral face 36 also cylindrical of revolution around the axis 8 but with a diameter smaller than that of the face 35, and corresponding to that of the face 22.
  • This face 36 defines the rod 48 of the piston 7, sealed with respect to the face 22 of the tubular body by the seal 24
  • a seal is provided in a similar manner, in the sense that inside the outer peripheral face 35 is arranged an annular groove 37 of revolution around the a fixed 8 and open in the direction of a distance from the latter, this groove 37 housing a seal 38.
  • the two faces 35 and 36 are connected to each other, at their respective downstream and upstream limits, by means of an annular, plane face 39, of revolution around the axis 8 to which it is perpendicular, which face 39 is turned downstream and is thus placed facing the face 25.
  • the outer peripheral face 35 of the piston 7 is connected to a flat annular face 41, of revolution about the axis 8 to which it is perpendicular, which face 41 is turned upstream and rests against the face 28 of the tubular body 6 in an upstream limit position of the piston 7 relative to the latter, illustrated in the figure and corresponding to a maximum longitudinal spacing between the face 39 of the piston 7 and the face 25 of the flange 26 of the tubular body 6, c is to say a maximum volume of the reservoir 21 of oxidant 2; an orifice 42 for filling the reservoir 21 with oxidizer 2 is arranged longitudinally between the faces 41 and 39 and, after filling the reservoir 21 with oxidizer 2 while the face 41 is in abutment on the face 28, is sealed off by a cap 43.
  • the face 36 extends downstream, from its connection to the face 39, over a distance such that when the piston 7 is supported by its face 41 on the face 28 of the tubular body 6, the face 36 crosses the flange 26 longitudinally right through, that is to say ends slightly upstream thereof, by connection with a planar annular face 44, of revolution about the axis 8 to which it is perpendicular, which face 44 faces downstream and defines the downstream end of the rod 48 of the piston 7.
  • This face 44 connecting to the face 36 in the direction of a distance relative to the axis 8, is also connected, in the direction of a approximation relative thereto, to an inner peripheral face 45 cylindrical of revolution around the axis 8 towards which this face 45 is turned.
  • the face 45 connects the face 44 to a transverse face 46 facing downstream and having the shape of a disc perpendicular to the axis 8.
  • the faces 45 and 46 thus delimit a longitudinal cavity 47 bordered by the face 44 and opening downstream, and this cavity 47 is intended to improve the cooperation between the rod 48 of the piston 7 and a piston 49 of the sub-assembly 3 which will be described later.
  • the face 46 of the cavity 47 delimits downstream a transverse web 49 further defined, upstream, by a transverse face 50 in the form of a flat disc, perpendicular to the axis 8, which face 50 defines the downstream limit another cavity 51 arranged inside the rod 48 of the piston 7 and which in turn opens out into the face 41 of the latter.
  • the cavity 51 is delimited, in the direction of a distance with respect to the axis 8, by an inner peripheral face 52 cylindrical of revolution around the axis 8 and turned towards the latter, with a corresponding diameter for example that of the inner peripheral face 45 delimiting the cavity 47, and this face 52 extends upstream from face 50 to face 41 of piston 7.
  • the piston 7 of the sub-assembly 4 receives by longitudinal interlocking, during the assembly of the sub-assembly 5 to the sub-assembly 4, a pyrotechnic generator 53 of pressurized gas, forming part of the sub-assembly 5 and intended to cause the passage of the piston 7, inside the tubular body 6, in a controlled manner from its illustrated position corresponding to the maximum volume of the reservoir 21, filled with oxidant 2, to a position not illustrated in which its face 39 directly adjoins the face 25 of the collar 26 of the tubular body 6, the reservoir 21 then having a zero or practically zero volume and having been emptied of its oxidant content 2, by means of the valve 29 and of the conduit 20, because of this movement.
  • a pyrotechnic generator 53 of pressurized gas forming part of the sub-assembly 5 and intended to cause the passage of the piston 7, inside the tubular body 6, in a controlled manner from its illustrated position corresponding to the maximum volume of the reservoir 21, filled with oxidant 2, to a
  • the controlled pyrotechnic generator 53 is carried by a flat, transverse plug 54, attached in an integral manner, with mutual longitudinal interlocking, on the extreme transverse face 14 and inside the inner peripheral face 16, directly adjacent to this face 14, of the tubular body 6.
  • the plug 54 is in particular delimited by an outer peripheral face 55 of cylindrical revolution around the axis 8, turned in the direction of a distance from the latter and having a diameter substantially identical to that of the inner peripheral face 16 of the tubular body 6 so that the face 55 can fit longitudinally, practically without play, in the face 16.
  • the face 55 is hollowed out with an annular groove 56 of revolution around the axis 8, and this groove 56, which opens in the direction of a distance from this axis 8, houses a seal 57.
  • the face 55 is connected to a transverse, planar face 58, annular of revolution about the axis 8 to which it is perpendicular, which face 58 is turned downstream and rests on the face 14 of the tubular body 6.
  • this face 58 is connected to an outer peripheral face 59 of the plug 54, which is cylindrical of revolution around the axis 8, turned in the direction of a distance relative to the latter, and has a diameter less than the diameter of the thread 13 at the bottom of the thread.
  • the face 59 thus connects the face 58, upstream, to another annular, flat face 60, of revolution around the axis 8 to which it is perpendicular, which face 60 is however turned upstream.
  • the plug 54 is delimited upstream by consecutive faces 61, 62, 63 whose shape is indifferent, although preferably of revolution around the axis 8; in the example illustrated, the face 61 is cylindrical of revolution around the axis 8 and turned in the direction of a distance from it, the face 62 frustoconical of revolution around the axis 8 and s' refining upstream, and the face 63, flat, in the form of a disc of revolution about the axis 8 to which it is perpendicular, this face 63 being turned upstream.
  • This face 65 is annular, flat, of revolution around the axis 8 to which it is perpendicular, and it is turned downstream; it connects the passage 64, in the direction of a distance relative to the axis 8, to the face 55 and, due to a longitudinal dimensioning of the latter less than that of the inner peripheral face 16 of the tubular body 6 , is placed opposite the face 41 of the piston 7, being spaced longitudinally from the latter even when the piston 7 occupies its upstream limit position corresponding to the maximum volume of the reservoir 21, as illustrated.
  • the passage 64 comprises two sections succeeding each other in the direction 9, that is to say from its mouth in the face 63 towards its mouth in the face 65, at the rate of an upstream section 66 comparatively narrow, transversely, retaining integral with an electric igniter 67, and with a comparatively wide downstream section 147 transversely, adjoining the face 65 and in particular delimited, in the direction of a distance from the axis 8, by an inner peripheral face 68 of general shape cylindrical of revolution around the axis 8 except that it is provided with a thread 69, in the immediate vicinity of its connection with the face 65.
  • this tapping 69 is mounted, integrally, on the stopper 54 an end piece 70 having, for this purpose, an outer peripheral face 71 of generally cylindrical shape of revolution around the axis 8, turned in the direction of a distance relative to the latter and having a thread 72 complementary to the internal thread 69.
  • the face 71 Downstream, the face 71 is connected to a flat annular face 73 of the end piece 70, which face 73 is of revolution about the axis 8 to which it is perpendicular, and turned upstream so as to rest on the face 65 around the mouth of the passage 64 therein.
  • this face 73 is connected to an external peripheral face 74 of the end piece 70, which face 74 is cylindrical of revolution around the axis 8 and turned in the direction a distance from it, with an intermediate diameter between the respective diameters of the inner peripheral face 52 of the piston 7 and of the inner peripheral face 16 of the tubular body 6, respectively smaller and larger.
  • this face 74 Downstream, this face 74 is connected to a flat annular face 75, of revolution about the axis 8 to which it is perpendicular, which face 75 is turned downstream and is thus placed opposite the face 41 ; the longitudinal dimension of the face 74 is however less than the longitudinal spacing of the face 41 of the piston 7 in the upstream limit position relative to the face 65 of the plug 54, and for example of the order of half this spacing if although there is no contact between the face 75 and the face 41 even when the piston 7 occupies its upstream limit position.
  • the face 75 is connected to an outer peripheral face 76 of the end piece 70, which is cylindrical of revolution around the axis 8 with a diameter less than that of the inner peripheral face 52 of the piston 7, although preferably greater than that of the outer peripheral face 71.
  • this face 76 Downstream, this face 76 is connected to an annular, flat face 77, facing downstream and of revolution about the axis 8 to which it is perpendicular.
  • this face 77 is connected to an axial passage 78 passing through the end piece 70 right through and also opening into an annular, flat face 79 of revolution around the axis 8 to which it is perpendicular, and delimiting the tip 70 upstream.
  • the passage 78 houses a pyrotechnic non-return valve 80, passing in the direction 9, that is to say in the direction of progression of the hot gases produced by the igniter 67 downstream through the passage 78 , and blocking in the opposite direction.
  • the plug 54 receives, by simple interlocking without mutual securing, a case 81 housed inside the cavity 51 of the piston 7 in particular when the latter occupies its upstream limit position and housing itself a composition pyrotechnic 82 capable of being initiated by the igniter 67 to produce propulsion gases from the piston 7 downstream inside the tubular body 6.
  • the case 81 containing the pyrotechnic composition 82 may not be fitted onto the end piece 70, by mutual longitudinal interlocking, only immediately before the assembly of the sub-assembly 5 to the sub-assembly 4, this which allows it to be stored until then independently of the igniter 67, in the best safety conditions.
  • the case 81 has a tubular, longitudinal wall 83 delimited, respectively towards the axis 8 and in the direction of a distance with respect thereto, by cylindrical faces of revolution about this axis, on the basis of an inner peripheral face 84 turned towards this axis and having a diameter substantially identical to that of the outer peripheral face 76 of the nozzle 70, and of an outer peripheral face 85 turned in the direction of a distance from the axis 8, with a diameter substantially identical to that of the inner peripheral face 52 of the rod 48 of the piston 7.
  • the wall 83 thus fits by its inner peripheral face 84 on the outer peripheral face 76 of the nozzle 70, and by its outer peripheral face 85 in the inner peripheral face 52 of the rod 48, in one and the other case with a radial clearance just sufficient to allow relative longitudinal sliding.
  • the wall 83 is sealed and is connected downstream to a bottom wall 86 which is also sealed, so that the cavity 51 is closed in a sealed manner on all sides, except upstream.
  • the bottom wall 86 is flat, transverse, and is delimited respectively upstream and downstream by flat faces 87, 88 in the form of a disc perpendicular to the axis 8 and centered on it.
  • the face 88 adjoins the face 50 of the web 49 practically without play.
  • the pyrotechnic composition 82 cast or compacted inside the case 81, directly adjoins the faces 84 and 87 of which it is integral; in the illustrated state of the device, it has, opposite the face 77 of the nozzle 70, a flat face 89, perpendicular to the axis 8 and facing upstream, respecting vis-à-vis the face 77 of the nozzle 70 has a longitudinal spacing such that there remains between them, inside the case 81, a volume 90 of expansion of the gases generated by the combustion of the pyrotechnic composition 82, and however sufficiently small to not harm the inflammation of the composition 82 by the igniter 67, through the valve 80.
  • the tubular wall 83 is connected to an annular transverse rim 91, of revolution around the axis 8, forming a projection in the direction of a distance relative to the latter on the outer peripheral face 85 In the direction of a distance from the axis 8, this rim 91 is delimited by a cylindrical edge 92 of revolution around the axis 8 with a diameter corresponding to that of the outer peripheral face 74 of the end piece.
  • the rim 91 has a dimension substantially equal to the difference between the longitudinal dimension of the nozzle 70 between its faces 73 and 75 and the longitudinal distance separating from one another the face 41 of the piston 7 in the upstream limit position and the face 65 of the plug 54 so that the flange 91 is immobilized without play between the piston 7 and the end piece 70 when the piston 7 occupies its upstream limit position.
  • the plug 54 is secured to the tubular body 6 by means which offer sufficient reaction to the thrust of the gases.
  • the sub-assembly 5 for this purpose comprises a ring 93 for longitudinal tightening, downstream, of the plug 54 by its face 58 and on the face 14 of the tubular body 6, which ring 93 is engaged. with the thread 13 of the tubular body 6.
  • the clamping ring 93 of generally annular shape of revolution around the axis 8, has in an downstream end region an inner peripheral face 94 of generally cylindrical shape of revolution around the axis 8 with a thread 95 axis 8, complementary to the thread 13 with which it is then engaged.
  • the tapped face 94 is connected by a planar annular shoulder 96 of revolution about the axis 8 to which it is perpendicular, being turned downstream, to an inner peripheral face 97 cylindrical of revolution around of the axis 8 with a diameter approximately equal to that of the outer peripheral face 59 of the plug 54 so as to allow a relative rotation around the axis 8 and a relative longitudinal translation without hindrance.
  • this inner peripheral face 97 is connected to another flat shoulder 98, annular of revolution about the axis 8 to which it is perpendicular, being turned downstream, which shoulder 98 rests longitudinally on the face 60 of the stopper 54, downstream, to press the stopper 54 through its face 14 on the face 58 of the tubular body 6.
  • the shoulder 98 is spaced longitudinally from the shoulder 96 by a distance less than the distance longitudinally separating the faces 58 and 60 of the plug 54.
  • the face 98 is connected to an inner peripheral face 99 of the clamping ring 93, which face 99 is cylindrical of revolution around the axis 8 and turned towards it, and has a diameter greater than that of the face 60 of the plug 54.
  • the shape of the clamping ring 93 is also indifferent when nothing prevents its rotation, about the axis 8, relative to the plug 54 and to the tubular body 6. To facilitate the taking of a tool in sight of this rotation, it advantageously has radial holes 100 regularly distributed angularly around the axis 8, according to a technique known in itself in the technique of screw joints, it being understood that other modes of action on the ring tightening 93, as well as other methods of fixing the plug 54 to the tubular body 6 could be chosen without departing from the scope of the present invention.
  • the gradual expulsion of the oxidant 2 from the reservoir 21 is accompanied by the gradual expulsion of the pyrophoric composition 1 by the piston 49, at the level of the sub-assembly 3 which will now be described .
  • the subassembly 3 comprises a longitudinally extreme flat plate 101, transverse, delimiting the device downstream when the three subassemblies 3, 4, 5 are mutually assembled.
  • the ring 101 Downstream, the ring 101 is delimited by a flat face 102, perpendicular to the axis 8 and having the shape of a disc with a diameter substantially equal to that of the outer peripheral face 10 of the tubular body 6.
  • this face 102 is connected to an outer peripheral face 103 of cylindrical revolution around the axis 8, turned in the direction of a distance relative to the latter and having a diameter substantially identical to that of the outer peripheral face 10 that this face 103 thus extends when the sub-assembly 3 is assembled to the sub-assembly 4.
  • this outer peripheral face 103 is connected to an annular, flat face 104, turned upstream and having a shape of revolution around the axis 8 to which it is perpendicular.
  • the plate 101 bears upstream on the face 15 of the tubular body 6 when the sub-assembly 3 is assembled to the sub-assembly 4.
  • the annular face 104 has a diameter corresponding approximately to that of the inner peripheral face 17 of the tubular body 6, and is connected at this level to an inner peripheral face 105 of the plate 101, which face 105 thus has a diameter corresponding approximately to that of the face 17, and more precisely slightly less than that of the face 17 in the example illustrated.
  • this inner peripheral face 105 is connected by means of a groove 106, annular of revolution around the axis 8 and hollowed out longitudinally in the plate 101, to a flat face 107, in the form of a perpendicular disc. to axis 8 and centered on it, which face 107 faces upstream.
  • the sub-assembly 3 is fixed to the sub-assembly 4 by the plate 101 and, for this purpose, has regular holes angularly distributed around the axis 8, not referenced, traversing it right through respective longitudinal axes 108 at its annular face 104, for the reception of bolts 109 of longitudinal clamping on the face 15 of the tubular body 6.
  • regular holes angularly distributed around the axis 8, not referenced, traversing it right through respective longitudinal axes 108 at its annular face 104, for the reception of bolts 109 of longitudinal clamping on the face 15 of the tubular body 6.
  • other means could be chosen for this purpose without leaving however within the scope of the present invention.
  • a respective blind hole 110, 111 of longitudinal axis In the face 104, between the faces 103 and 105, and in the face 15, between the faces 10 and 17, there is further provided a respective blind hole 110, 111 of longitudinal axis, the longitudinal axes of the two blind holes 110 and 111 merging into a single longitudinal axis 112 when the plate 101 and the tubular body 6 occupy around the axis 8 a determined angular orientation, in which they are assembled together.
  • the two blind holes 110, 111 enclose a common longitudinal pin 113 fitted longitudinally in one of them before assembly and having a longitudinal dimension such that it protrudes from the corresponding transverse face respectively 104 or 15 and engages in the other blind hole 110, 111 when the 'We put in place the end plate 101 on the tubular body 6, by a relative longitudinal approximation movement.
  • the conduit 114 is sealed, by producing the plate 101 in an intrinsically sealed material.
  • this tightness is preserved by an annular seal 116, of revolution around the axis 115, engaged in a groove 117 itself annular of revolution around the axis 115, arranged in the face 104 around the mouth of the conduit 114 in the latter; when the plate 101 is assembled with the tubular body 6, the seal 116 engaged in the groove 117 collapses longitudinally between the latter.
  • the conduit 114 opens out through a nozzle 118 for ejecting the oxidizing fluid, which nozzle 118 has downward bending in the direction of approximation with respect to the axis 8 so that that the oxidizing fluid 2, when it is expelled from the reservoir 21 by displacement of the piston 7 downstream, and passing successively through the valve 29, the conduit 20, the conduit 114 and the nozzle 118, escapes towards the downstream, outside the device, being oriented towards axis 8.
  • the plate 101 is moreover traversed longitudinally on the one hand by an orifice 119, normally closed in leaktight manner by a plug 120, with a view to filling pyrophoric fluid 1 with a reservoir 121 which it closes tightly by its face 107, inside the subassembly 3, and on the other hand by a conduit 122 for exhausting this pyrophoric fluid 1 from the reservoir 121.
  • the conduit 122 has a longitudinal axis 123 substantially closer to the axis 8 than the axis 115 of the conduit 114, and located opposite the axis 8 relative to this axis 115, in the same longitudinal plane including the axis 8 and constituting the section plane of the figure.
  • the conduit 122 opens along this axis 123 by a nozzle 124 for ejecting pyrophoric fluid, the relative positioning of the axes 123 and 115 and the respective orientation of the nozzles 118 and 124 causing a mixture of the pyrophoric fluid 1 with the oxidizing fluid 2 in an area offset downstream relative to the device, area where the spontaneous ignition of the pyrophoric fluid 1 takes place under the effect of contact with the oxidizing fluid 2.
  • the conduit 122 Upstream, the conduit 122 has along the axis 123 a mouth 125 in the reservoir 121, and it is provided in the immediate vicinity of this mouth 125 with a valve 126, for example identical to the valve 29 whose description is will refer in this regard; the valve 126 is blocking in a direction going from the nozzle 124 towards the mouth 125 and suitable for opening to allow the passage of the pyrophoric fluid 1 in a direction going from the mouth 125 towards the nozzle 124, through the conduit 122 , when the pressure of the pyrophoric fluid 1 in the reservoir 121 exceeds a predetermined threshold, which is advantageously identical to the predetermined threshold for opening the valve 29, but may also be different.
  • a predetermined threshold which is advantageously identical to the predetermined threshold for opening the valve 29, but may also be different.
  • the plate 101 carries in a solid and sealed manner, projecting upstream relative to these faces 107 and 104, a longitudinal skirt 127 sealed, tubular of revolution around the axis 8 .
  • the skirt 127 is delimited by an outer peripheral face 128 of cylindrical revolution about this axis 8 with a diameter corresponding substantially to that of the inner peripheral face 17 of the tubular body 6, with which the face 128 is placed in mutual contact with the possibility of relative longitudinal sliding, in particular during the mounting of the sub-assembly 3 on the sub-assembly 4.
  • the skirt 127 is delimited by an inner peripheral face 129 also cylindrical of revolution around the axis 8, with a diameter corresponding substantially to that of the face 107.
  • the face 128 presents an unreferenced, annular recess of revolution around the axis 8, to rest downstream on the face 104 and continue, with a reduced diameter corresponding to that of the face inner peripheral 105 in the plate 101, up to the interior of the groove 106 where it is connected to the inner peripheral face 129 by an edge 130 of the skirt 127, which is annular, plane, of revolution around the axis 8 to which it is perpendicular while being turned downstream.
  • the groove 106 Opposite the inner peripheral face 129 of the skirt 127, the groove 106 has an annular undercut 131 of revolution about the axis 8 and turned in the direction of a distance relative to the latter, which counter draft 131 contains an annular seal 132 ensuring a seal between the skirt 127 and the plate 101, both of which are sealed.
  • the skirt 127 forms with respect to the face 104 of the plate 101 a projection of a dimension corresponding approximately to the longitudinal dimension separating the face 15 from the face 18 of the tubular body 6, although slightly less than this dimension.
  • the skirt 127 integrally carries an end flange 133 flat, annular of revolution around the axis 8 and forming a projection towards the latter relative to the inner peripheral face 129.
  • the flange 133 is delimited by faces of revolution around the axis 8, on the basis of an annular, transverse, plane face 134 turned upstream and thus placed opposite the face 18 of the tubular body 6 with which it defines, due to the aforementioned dimensioning, an intermediate volume 135 communicating with the outside of the device by the vent passage 19, of a face 136 also annular, plane, perpendicular to the axis 8 but turned towards the 'downstream, and a cylindrical edge face 137 of revolution around the axis 8, turned towards the latter and having a diameter greater than that of the inner peripheral face 22 of the flange 26 of the tubular body 6, although less than the respective diameter of the faces 129 and 128 to which this face 137 is connected, in the direction of a distance with respect to the axis 8, respectively by the face 136 and by the face 134.
  • the rim 133 thus gives off a longitudinal passage for the rod 48 of the piston 7 when the latter passes from its upstream limit position, illustrated, to its downstream limit position.
  • the reservoir 121 thus delimited downstream by the face 107 of the plate 101 and in the direction of a distance with respect to the axis 8 by the face 129 of the skirt 127, is delimited towards the upstream by a face 138 of the piston 49, which face 138 has the shape of a disc perpendicular to the axis 8, centered thereon and facing downstream.
  • the face 138 located inside the skirt 127, is connected in the direction of a distance with respect to the axis 8 to an external peripheral face 139 of the piston 49, which face 139 is cylindrical of revolution around the 'axis 8 and rotated in the direction of a distance from it, and has a diameter substantially identical to that of the face 129 with which it is placed in guide contact with relative longitudinal sliding.
  • a groove 140 annular of revolution around the axis 8 and housing a seal 141, itself annular of revolution around the axis 8, placed in sliding contact with the face 129 to seal the piston 49 vis-à-vis the latter, which serves as a cylinder whose face 107 of the plate 101 constitutes the bottom.
  • the face 139 of the piston 49 is connected to an annular, plane face 142 of revolution about the axis 8 to which it is perpendicular.
  • the piston 49 rests on the one hand on the face 136 of the rim 133 of the skirt 127 in an upstream limit position of the piston 49, corresponding to a maximum volume of the reservoir 121 by maximum longitudinal spacing of the face 138 of the piston 49 with respect to the face 107 of the plate 101, and on the other hand on the face 44 of the rod 48 of the piston 7, both in this upstream limit position which corresponds at the upstream limit position of the piston 7 by means of an appropriate longitudinal dimensioning, than in any longitudinal position of the piston 7 from this upstream limit position to its downstream limit position, to which corresponds a downstream limit position of the piston 49; in this downstream limit position, the face 138 of the latter adjoins the face 107 of the plate 101, the reservoir 121 then simultaneously presenting the reservoir 21 with its minimum volume, advantageously zero.
  • the longitudinal distance separating the face 138 of the piston 49 from the face 107 of the plate 101 is identical to the longitudinal distance separating the face 39 of the piston 7 from the face 25 of the flange 26 of the body tubular 6 and this relationship is preserved whatever the respective positions of the piston 7 and the piston 49 inside the tubular body 6 and inside the skirt 127.
  • the flow and pressure conditions under which the mixing takes place, as well as the positioning of the zone of the space in which it takes place, with respect to the device can also be regulated by the choice of an appropriate design of the nozzles 118 and 124 as well as of the valves 29 and 126, as is easily understood by a person skilled in the art.
  • the face 142 is connected in the direction of approximation with respect to the axis 8, in a circle of a corresponding diameter substantially to the diameter of the inner peripheral face 45 of the rod 48, to a rod 143 forming a longitudinal projection upstream on the face 142, and more precisely to an external peripheral face 144 of this rod 143, cylindrical of revolution around axis 8, rotated in the direction of a distance from it;
  • the face 144 of the rod 143 has a diameter corresponding substantially to that of the inner peripheral face 45 of the rod 48, in the cavity 47 from which the rod 143 thus penetrates longitudinally, with the possibility of relative longitudinal sliding during the positioning of the sub-assembly 3 on the sub-assembly sub-assembly 2, which is effected by longitudinal translation of the 3 formed by the plate 101, the skirt 127 and the piston 49 then stationary in its upstream limit position, relative to the sub-assembly assembly 4 formed by the tubular body 6 and the piston 7 itself occupying its upstream limit position
  • the face 144 is connected by a facet 145, frustoconical of revolution around the axis 8 and converging upstream, to a planar transverse face 146 perpendicular to the axis 8 and centered on it; this face 146, facing upstream, is spaced longitudinally of the face 142 by a distance slightly less than that which mutually separates the faces 44 and 46 of the rod 48, to allow the abovementioned support of the piston 49 by its face 142 on the face 44 of the rod 48, upstream.
  • the pyrophoric fluid 1 and the oxidizing fluid 2 could be accommodated in the reservoirs 21 and 121, respectively, and that the fluids thus ejected simultaneously could be other than a pyrophoric fluid and an oxidizing fluid, and could be of a nature other than pyrotechnic since it would be necessary to protect them against any mixture as long as this mixture is not desired, and to cause their mixing only at a certain distance from the device.
  • the number of pistons controlled simultaneously could be greater than two.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Coating Apparatus (AREA)
  • Air Bags (AREA)

Claims (8)

  1. Vorrichtung zum gleichzeitigen Ausstoß von zwei Fluiden (1, 2), insbesondere pyrotechnischen Fluiden, welche durch einen gegenseitigen Kontakt nach ihrem Ausstoß reagieren sollen, welche umfaßt:
    - ein erstes (21) und zweites (121) dichtes Reservoir für ein erstes (2) Fluid bzw. für das zweite (1) der Fluide (1, 2), wobei das erste (21) und zweite (121) Reservoir gegeneinander hinsichtlich des Auftretens eines Kontaktes zwischen dem ersten (2) und zweiten (1) Fluid isoliert sind,
    - eine erste (118) und zweite (124) Ausstoßdüse für das erste (2) bzw. zweite (1) Fluid,
    - eine erste (20, 114) und zweite (112) dichte Leitung, welche die erste Düse (118) mit dem ersten Reservoir (21) bzw. die zweite Düse (124) mit dem zweiten Reservoir (121) verbinden und gegeneinander hinsichtlich des Auftretens eines Kontaktes zwischen den zwei Fluiden (1, 2) isoliert sind,
    - eine gesteuerte Einrichtung (7, 49) zum gleichzeitigen Austreiben des ersten (2) und zweiten (1) Fluides aus dem ersten (21) und zweiten (121) Reservoir zu der ersten (118) und zweiten (126) Düse über die erste (20, 114) und zweite (122) Leitung,
    dadurch gekennzeichnet, daß das erste (21) und zweite (121) Reservoir aus koaxialen ersten (27) und zweiten (129) Zylindern aufgebaut sind, welche in einer festgelegten, jeweils gleichen axialen Richtung (9) jeweils durch einen Boden (25, 107) verschlossen sind, in welchen die erste (20, 114) bzw. zweite (122) Leitung mündet,
    und daß die gesteuerte Einrichtung (7, 49) zum gleichzeitigen Austreiben des ersten (2) und zweiten (1) Fluids einen ersten (7) und zweiten (49) Kolben, die zumindest in der besagten Richtung (9) axial verschieblich im Inneren des ersten (27) bzw. zweiten (129) Zylinders montiert sind und den ersten (27) bzw. zweiten (129) Zylinder in der Richtung entgegengesetzt zu der besagten Richtung (9) verschließen, wobei der zweite Kolben (49) mechanisch mit dem ersten Kolben (7) derart gekoppelt ist, daß ein Verschieben des ersten Kolben (7) in die besagte Richtung (9) im Inneren des ersten Zylinders (27) das Verschieben des zweiten Kolbens (49) in die besagte Richtung im Inneren des zweiten Zylinders (129) hervorruft, und eine gesteuerte Einrichtung (82) zum Erzeugen der Verschiebungsbewegung des ersten Kolbens (7) in die besagte Richtung (9) im Inneren des ersten Zylinders (27) aufweist.
  2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, daß sie mindestens zwei dichte Untereinheiten (3, 4) aufweist, die in einem Lagerzustand voneinander getrennt sind und in einem Gebrauchszustand zusammenmontiert sind, derart, daß in einer ersten Untereinheit (4) der erste Zylinder (27), welcher das erste Fluid (2) enthält, der entsprechende Boden (25) und der erste Kolben (7) zusammengefaßt sind und in einer zweiten Untereinheit (3) der zweite Zylinder (129), welcher das zweite Fluid (1) enthält, der entsprechende Boden (127) und der zweite Kolben (49) zusammengefaßt sind.
  3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß sie weiterhin eine dritte Untereinheit (5) aufweist, welche in dem Lagerzustand von der ersten (3) und zweiten (4) Untereinheit getrennt ist und in dem Gebrauchszustand mit der ersten (3) und zweiten (4) Untereinheit zusammenmontiert ist, wobei die dritte Untereinheit (5) die gesteuerte Einrichtung (82) zum Erzeugen der Verschiebungsbewegung des ersten Kolbens (7) enthält.
  4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die gesteuerte Einrichtung (82) zum Erzeugen der Verschiebungsbewegung des ersten Kolbens (7) eine gesteuerte pyrotechnische Einrichtung (82) zum Erzeugen von unter Druck stehendem Gas aufweist, welches auf den ersten Kolben (7) in dem ersten Zylinder (27) auf der dem ersten Fluid (2) abgewandten Seite einwirkt.
  5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die gesteuerte Einrichtung (82) zum Erzeugen der Verschiebungsbewegung des ersten Kolbens (7), der erste Zylinder (27) und der zweite Zylinder (129) zueinander in der besagten Richtung (9) axial ausgerichtet sind.
  6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß der erste Kolben (7) eine axiale Stange (48) zum Drücken des zweiten Kolbens (49) in die besagte Richtung (9) aufweist, wobei diese Stange (48) einen axialen Fortsatz bezüglich des ersten Kolbens (7) in die besagte Richtung, durch den ersten Zylinder (27) und den entsprechenden Boden (25), bildet, um in Eingriff mit dem zweiten Kolben (49) zu kommen.
  7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß sie an der Öffnung (31, 125) der ersten (20, 114) und zweiten (122) Leitung in dem jeweils entsprechenden Boden (25, 107) jeweils ein normalerweise geschlossenes Sperrventil (29, 126) aufweist, welches sich zu der ersten (20, 114) bzw. zweiten (121) Leitung öffnet, wenn der Druck in dem ersten (27) bzw. zweiten (129) Zylinder eine vorbestimmte Schwelle überschreitet.
  8. Vorrichtung nach einem der Ansprüche 1 bis 7 zur Verwendung als Infrarot-Täuschkörper, dadurch gekennzeichnet, daß das erste (2) und das zweite (1) Fluid durch ein oxydierendes (2) und ein pyrophores Fluid (1) gebildet werden.
EP94401273A 1993-06-08 1994-06-08 Vorrichtung zum gleichzeitigen Ausstossen von zwei Flüssigkeiten, insbesondere pyrotechnischen Flüssigkeiten Expired - Lifetime EP0653603B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9306826A FR2706202B1 (fr) 1993-06-08 1993-06-08 Dispositif d'éjection simultanée de deux fluides, notamment pyrotechniques.
FR9306826 1993-06-08

Publications (2)

Publication Number Publication Date
EP0653603A1 EP0653603A1 (de) 1995-05-17
EP0653603B1 true EP0653603B1 (de) 1997-11-19

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Application Number Title Priority Date Filing Date
EP94401273A Expired - Lifetime EP0653603B1 (de) 1993-06-08 1994-06-08 Vorrichtung zum gleichzeitigen Ausstossen von zwei Flüssigkeiten, insbesondere pyrotechnischen Flüssigkeiten

Country Status (5)

Country Link
US (1) US5419257A (de)
EP (1) EP0653603B1 (de)
CA (1) CA2125360C (de)
DE (1) DE69406896T2 (de)
FR (1) FR2706202B1 (de)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
DE19841113A1 (de) 1998-09-09 2014-04-24 Ernst-Christian Koch Selbstschutzeinrichtung für Strahlflugzeuge

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FR2741435B1 (fr) * 1995-11-17 1998-01-02 Giat Ind Sa Projectile permettant la dispersion d'un produit sur trajectoire
DE69608644T2 (de) * 1995-11-17 2000-09-21 Giat Industries, Versailles Dispersions- oder Auftragungsverfahren eines aktiven Materials, Zusammensetzung und Gemäss diesem Verfahren hergestelltes Geschoss
US6318272B1 (en) * 1995-12-06 2001-11-20 Denel (Proprietary) Limited Breaking or blasting or splitting of rock
US5631441A (en) * 1996-04-02 1997-05-20 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence Of Her Majesty's Canadian Government XDM pyrophoric countermeasure flare
US6098548A (en) * 1997-03-05 2000-08-08 Autoliv Asp, Inc. Non-pyrotechnic initiator
CA2288515C (en) * 1999-03-08 2007-10-23 Mrel Group Of Companies Limited A simple kit and method for humanitarian demining operations and explosive ordnance disposal
US7707938B2 (en) * 2005-05-16 2010-05-04 Hisel Stanley D Apparatus and method for avalanche control
US7714732B2 (en) * 2007-05-31 2010-05-11 Cox Raleigh I Optical switch

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US1856871A (en) * 1929-11-22 1932-05-03 Safety Mining Co Blasting cartridge
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Publication number Priority date Publication date Assignee Title
DE19841113A1 (de) 1998-09-09 2014-04-24 Ernst-Christian Koch Selbstschutzeinrichtung für Strahlflugzeuge

Also Published As

Publication number Publication date
FR2706202A1 (fr) 1994-12-16
CA2125360A1 (fr) 1994-12-09
DE69406896T2 (de) 1998-06-18
CA2125360C (fr) 2002-03-26
DE69406896D1 (de) 1998-01-02
EP0653603A1 (de) 1995-05-17
FR2706202B1 (fr) 1995-09-01
US5419257A (en) 1995-05-30

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