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EP0404644B1 - Elektropyrotechnische Vorrichtung zur Inbetriebnahme eines Gasgenerators - Google Patents

Elektropyrotechnische Vorrichtung zur Inbetriebnahme eines Gasgenerators Download PDF

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Publication number
EP0404644B1
EP0404644B1 EP90401674A EP90401674A EP0404644B1 EP 0404644 B1 EP0404644 B1 EP 0404644B1 EP 90401674 A EP90401674 A EP 90401674A EP 90401674 A EP90401674 A EP 90401674A EP 0404644 B1 EP0404644 B1 EP 0404644B1
Authority
EP
European Patent Office
Prior art keywords
rear base
ferrule
efi
explosive
casing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90401674A
Other languages
English (en)
French (fr)
Other versions
EP0404644A1 (de
Inventor
Denis Beaufay
Jean Boucard
Jean Holtz
André Winaver
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.)
Thomson Brandt Armements SA
Original Assignee
Thomson Brandt Armements SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thomson Brandt Armements SA filed Critical Thomson Brandt Armements SA
Publication of EP0404644A1 publication Critical patent/EP0404644A1/de
Application granted granted Critical
Publication of EP0404644B1 publication Critical patent/EP0404644B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/04—Arrangements for ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/04—Blasting cartridges, i.e. case and explosive for producing gas under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • F42B3/12—Bridge initiators

Definitions

  • the invention relates to an electropyrotechnic device intended to trigger the operation of a gas generator.
  • One of the applications of these devices is, for example, in the field of ejecting air-ground submunitions from a cargo ship using the use of gases formed by powder generators. Difficulties appear when the number of gas generators increases, in particular with regard to reliability, since the precautions necessary to ensure an acceptable reliability rate then become very costly in cost and in place.
  • TBI being the English initials of Through-Bulkead explosion Initiation, these devices comprising an upstream cavity containing a donor explosive which generates, under the effect of a detonation, a shock wave, which shock wave crosses a wall or tight barrier to initiate a receiving explosive contained in a downstream chamber.
  • the subject of the present invention is an electropyrotechnic device as described in claims 1 to 8.
  • an electropyrotechnic device (E) essentially consists, for its ignition part, of a primer with a projected layer (1), better known under the English terminology of "EFI” ( Exploding Foil Initiator).
  • EFI Exploding Foil Initiator
  • This generates a detonation in an upstream cavity (Ca) which contains a secondary donor explosive (2).
  • a secondary donor explosive (2) When the latter detonates, it generates a shock wave which propagates through a tight barrier (3) towards a downstream chamber (Ch) containing a secondary receiving explosive (4), capable of detonating to cause flames which, in turn , cause combustion of the powder charge (P) of the gas generator (g) concerned.
  • the igniter of the gas generator is thus ensured, in accordance with the invention, by means of the combination of an EFI and an IFOC (igniter operating by shock wave).
  • Such a combination has the advantage of avoiding the installation in the pyrotechnic chain, as is the case in the known art, of safety means between conventional igniters and pyrotechnic charges. In addition, this avoids the introduction of electrical means inside the gas generators.
  • the device described consists of an igniter as described above, capable of ensuring the correct start of combustion, of a double-base propellant charge having a profile and combustion characteristics such that the pressure is maintained at an almost constant value throughout the duration of the combustion.
  • a closing pallet (22) is put in place to close the IFOC chamber (ch).
  • the powder loading (P) is carried out inside a ferrule (10) whose front bottom (15) is hemispherical and whose rear bottom (16) which carries the nozzles (12, 13), is made integral with the shell (10) by means, for example, of a screw thread (14).
  • This rear bottom (16) has the shape of a converging truncated cone, the nozzles (12) and 13 opening into the side wall of this truncated cone.
  • the nozzles are two in number, diametrically opposite, but this number is not limiting.
  • the closing element (21) of the rear bottom (16) has at the top of the truncated cone two bores arranged head to tail, one delimits the volume of the downstream chamber (Ch) containing the secondary receiving explosive (4), the other the volume of the cavity (Ca) containing the secondary donor explosive (2); a zone of the closing element (21) constitutes the tight barrier (3) of the IFOC, a barrier capable of allowing the propagation of the shock wave while having qualities of sufficient mechanical resistance.
  • the rear bottom (16) is capped with a waterproof metallized plastic casing (17) whose bottom (18) is also in the form of a truncated cone, complementary to the convergent truncated cone defined above.
  • the two ends of these two trunks of cones fit into each other, trapping the cavity (Ca) containing the secondary donor explosive (2).
  • the cover (30) of this housing (17) maintains in position the EFI (1) placed on the top of the truncated cone of the housing (17).
  • the latter contains the control electronics (not shown) which is supplied through its wall, via filters (31) and sealed crossing means (37), by means of an electrical connection (32) itself connected to a sequencer not shown.
  • This housing (17) is placed on a cushion (33) acting as a shock absorber while a set of seals (34) seals at all levels.
  • the housing is made for example of metallized plastic and constitutes an ideal housing for the electronic control of the EFl (1).
  • FIG 3 illustrates another embodiment of the combination (EFI-IFOC) integrated in the rear bottom (16) nozzle holders.
  • EFI-IFOC the combination
  • the propellant charge consists of seven powder loaves (P) whose combustion profile is star ( Figure 3). These powder loaves (double-base propellant) are held in place by two metal grids (50) provided with clamping claws (55) and spacing elements (56).
  • the electronic control means are compacted as much as possible inside a box itself located inside the general structure of the gas generator.
  • the invention applies each time a battery of generators is used, as is the case in the field of ejecting air-to-ground submunitions from a cargo ship.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Claims (8)

  1. Elektropyrotechnische Vorrichtung zum Auslösen eines mit Pulver (P) arbeitenden Generators, wobei die Vorrichtung eine vordere Kammer (Ca) mit einem steuernden Explosivstoff (2) enthält, der aufgrund einer Detonation eine Stoßwelle erzeugt, die eine dichte Barriere (3) durchquert und einen gesteuerten Explosivstoff in einer hinteren Kammer (Ch) auslöst, dadurch gekennzeichnet, daß die Vorrichtung einen EFI-Zünder (1) besitzt (EFI = Exploding Foil Initiator = Zünder mit explodierender Folie), der bei der Zündung eine Detonation in der vorderen Kammer (Ca) erzeugt und gegenüber der vorderen Kammer (Ca) liegt, daß der steuernde Explosivstoff (2) ein Sekundärexplosivstoff und der gesteuerte Explosivstoff (4) ein sekundärer IFOC-Explosivstoff (IFOC = Explosivstoff mit Stoßwellenauslösung) ist, der bei der Detonation unter der Wirkung der Stoßwelle Flammen hervorruft, die die Auslösung des mit Pulver (P) arbeitenden Generators nach sich zieht, und daß der Generator in einem mit einem vorderen Boden (15) und einem hinteren Boden (16) versehenen Mantelring (10) untergebracht ist und
    - die hintere Kammer (Ch) in einer ersten Bohrung eines Verschlußelements (21) des hinteren Mantelringbodens (16) ausgebildet ist, der Kegelstumpfform besitzt, wobei Düsen (12, 13) in der Seitenwand des hinteren Bodens (16) münden,
    - die vordere Kammer (Ca) in einer zweiten Bohrung ausgebildet ist, die der ersten Bohrung entgegengerichtet und gegen diese durch die dichte Barriere getrennt ist, wobei letztere von einer Zone des Verschlußelements (21) des hinteren Bodens (16) des Mantelrings (10) gebildet wird,
    - ein Gehäuse (17) mit einem Boden (18), dessen Form der Kegelstumpfform des hinteren Bodens (16) des Mantelrings (10) komplementär ist, diesen hinteren Boden (16) bedeckt.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Gehäuse (17) einen Deckel (30) aufweist, der den EFI-Zünder (1) einklemmt, der zwischen diesem Deckel und dem Scheitel des Kegelstumpfs des Gehäuses (17) angeordnet ist.
  3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der EFI-Zünder mit dem Scheitel des hinteren Bodens (16) des Mantelrings (10) fest verbunden ist.
  4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß eine Steuerelektronik des EFI-Zünders (1) in dem Gehäuse (17) enthalten ist.
  5. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß eine Kappe (35) die von dem Gehäuse (17), dem EFI-Zünder, dem IFOC-Explosivstoff, dem Mantelring (10) und dem hinteren Boden gebildete Einheit bedeckt.
  6. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Mantelring (10) mit einer Vielzahl von zweibasischen Pulverkuchen (P) geladen wird, die ein sternförmiges Profil und eine Zusammensetzung besitzen, die einen praktisch konstanten Druck während der Brennzeit gewährleisten.
  7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Pulverkuchen (P) durch ein Metallgitterpaar (50) gehalten werden.
  8. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß mindestens zwei Düsen einander diametral gegenüberliegend in der Seitenwand des hinteren Bodens (16) münden.
EP90401674A 1989-06-20 1990-06-15 Elektropyrotechnische Vorrichtung zur Inbetriebnahme eines Gasgenerators Expired - Lifetime EP0404644B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8908183A FR2648554B1 (fr) 1989-06-20 1989-06-20 Systeme mettant en oeuvre un dispositif electropyrotechnique destine a declencher sequentiellement le fonctionnement d'une batterie de generateurs de gaz
FR8908183 1989-06-20

Publications (2)

Publication Number Publication Date
EP0404644A1 EP0404644A1 (de) 1990-12-27
EP0404644B1 true EP0404644B1 (de) 1993-06-23

Family

ID=9382932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90401674A Expired - Lifetime EP0404644B1 (de) 1989-06-20 1990-06-15 Elektropyrotechnische Vorrichtung zur Inbetriebnahme eines Gasgenerators

Country Status (5)

Country Link
US (1) US5092237A (de)
EP (1) EP0404644B1 (de)
CA (1) CA2019304A1 (de)
DE (1) DE69002040D1 (de)
FR (1) FR2648554B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE37843E1 (en) 1991-09-18 2002-09-17 Trw Vehicle Safety Systems Inc. Apparatus for inflating a vehicle occupant restraint using a mixture of gases
US5348344A (en) * 1991-09-18 1994-09-20 Trw Vehicle Safety Systems Inc. Apparatus for inflating a vehicle occupant restraint using a mixture of gases
US5969286A (en) * 1996-11-29 1999-10-19 Electronics Development Corporation Low impedence slapper detonator and feed-through assembly
US6607214B2 (en) * 2001-08-17 2003-08-19 Autoliv Asp, Inc. Gas generation via indirect ignition
US7380820B2 (en) * 2005-06-23 2008-06-03 Trw Vehicle Safety Systems Inc. Heated gas inflator

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1194102A (de) * 1959-11-06
US2703960A (en) * 1953-08-31 1955-03-15 Phillips Petroleum Co Rocket
DE1016171B (de) * 1954-01-06 1957-09-19 Ici Ltd Kraftgas erzeugende Ladung
DE1167120B (de) * 1960-08-10 1964-04-02 Boelkow Entwicklungen Kg Feststoffraketentriebwerk, dessen Treibstoffkoerper als Sterninnenbrenner ausgebildet ist
DE1271582B (de) * 1964-02-21 1968-06-27 Dynamit Nobel Ag Zuendpatrone, insbesondere zum Zuenden des Brennstoff-Luft-Gemisches fuer die Antriebsmaschine eines Torpedos
US3678853A (en) * 1970-06-12 1972-07-25 Us Navy Quick disconnect explosive connector assembly
US3770387A (en) * 1971-04-09 1973-11-06 Allied Chem Deflector
US3945322A (en) * 1974-04-05 1976-03-23 The United States Of America As Represented By The Secretary Of The Navy Through-bulkhead explosion initiation
US3982488A (en) * 1975-02-19 1976-09-28 The United States Of America As Represented By The Secretary Of The Army Flueric through bulkhead rocket motor ignitor
US4144814A (en) * 1976-07-08 1979-03-20 Systems, Science And Software Delay detonator device
FR2470757A1 (fr) * 1979-12-07 1981-06-12 Aerospatiale Raccord pyrotechnique a parties etanches et autolargables
EP0040011B1 (de) * 1980-05-09 1984-08-08 EMI Limited Anordnung zum Zünden einer pyrotechnischen Ladung
US4602565A (en) * 1983-09-26 1986-07-29 Reynolds Industries Inc. Exploding foil detonator
FR2591735B1 (fr) * 1985-12-17 1989-09-15 Thomson Brandt Armements Generateur pyrotechnique de gaz et utilisation dans un dispositif ejecteur de sous-munitions d'une charge militaire
US4944225A (en) * 1988-03-31 1990-07-31 Halliburton Logging Services Inc. Method and apparatus for firing exploding foil initiators over long firing lines

Also Published As

Publication number Publication date
FR2648554B1 (fr) 1994-03-25
US5092237A (en) 1992-03-03
FR2648554A1 (fr) 1990-12-21
EP0404644A1 (de) 1990-12-27
CA2019304A1 (fr) 1990-12-20
DE69002040D1 (de) 1993-07-29

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