EP1092940B1 - Anzündvorrichtung für eine Treibladung - Google Patents

Anzündvorrichtung für eine Treibladung Download PDF

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Publication number
EP1092940B1
EP1092940B1 EP00402721A EP00402721A EP1092940B1 EP 1092940 B1 EP1092940 B1 EP 1092940B1 EP 00402721 A EP00402721 A EP 00402721A EP 00402721 A EP00402721 A EP 00402721A EP 1092940 B1 EP1092940 B1 EP 1092940B1
Authority
EP
European Patent Office
Prior art keywords
ignition
case
tubular part
strand
ignition device
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
EP00402721A
Other languages
English (en)
French (fr)
Other versions
EP1092940A1 (de
Inventor
Laurent Desgland
Nicole Forichon Chaumet
Patrick Berneau
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.)
Giat Industries SA
Original Assignee
Giat Industries 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 Giat Industries SA filed Critical Giat Industries SA
Publication of EP1092940A1 publication Critical patent/EP1092940A1/de
Application granted granted Critical
Publication of EP1092940B1 publication Critical patent/EP1092940B1/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
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/02—Cartridges, i.e. cases with charge and missile
    • F42B5/18—Caseless ammunition; Cartridges having combustible cases
    • F42B5/181—Caseless ammunition; Cartridges having combustible cases consisting of a combustible casing wall and a metal base; Connectors therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/0823—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition
    • F42C19/083—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition characterised by the shape and configuration of the base element embedded in the cartridge bottom, e.g. the housing for the squib or percussion cap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/0823—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition
    • F42C19/0834—Arrangements of a multiplicity of primers or detonators dispersed within a propellant charge for increased efficiency

Definitions

  • the technical field of the invention is that of ignition devices for contained propellant charge in a cylindrical case of ammunition.
  • the invention relates more particularly to devices ignition using at least one ignition element linear energy such as a cord.
  • These elements are produced for example in the form of wires, films, strands, cords. They understand for example a pyrotechnic composition, such as black powder or a composition combining Boron and potassium nitrate or aluminum and potassium perchlorate or Magnesium / polytetrafluoroethylene / copolymer of chlorofluoroethylene (Magnesium / Teflon (registered trademark) / Viton (trademark)).
  • a pyrotechnic composition such as black powder or a composition combining Boron and potassium nitrate or aluminum and potassium perchlorate or Magnesium / polytetrafluoroethylene / copolymer of chlorofluoroethylene (Magnesium / Teflon (registered trademark) / Viton (trademark)).
  • composition is packaged in a carrier by example a plastic tube.
  • Energy elements can also include one or more secondary explosives (hexogen, octogen) made integral with a support.
  • secondary explosives hexogen, octogen
  • the propagation the ignition will be more or less rapid (reaction of combustion, deflagration or detonation) and efficiency radial of the ignition provided by the energy element will also more or less important.
  • the energy elements are fixed on the internal surface of the case or on a part back of the projectile.
  • the charge propellant is usually placed in the case before the installation of the igniter tube.
  • the latter is introduced in last place by an axial hole in the base and fixed by simple screwing.
  • Such a solution is unsuitable for a device ignition incorporating different elements regularly distributed inside the case.
  • the patent US5325785 proposes to provide a support of cords which covers the back of the projectile and on which we just screw a support Lighter.
  • cord holder is a piece which surrounds the rear of the projectile at the tail.
  • This piece is complex in shape, it has grooves longitudinal receiving the cords and grooves cooperating with the tail fins.
  • the ignition device proposed by the invention is simple inexpensive and facilitates the operations of powder loading and case assembly.
  • the subject of the invention is an ignition device for a propellant charge contained in a case cylindrical ammunition device comprising at least a linear energy ignition element and a means initiation of the latter
  • the initiation means comprises a tubular piece, arranged at a bottom of closing the case and delimiting a room which communicates with a pyrotechnic initiation component, tubular part comprising an axial hole intended for allow passage and entry into the room of the linear ignition elements arranged substantially at the level of the axis of the case
  • the device is characterized by what it may include at least two ignition elements linear energy, these elements being linked on minus part of their length so as to form a strand which is arranged substantially at the axis of the case and which enters the chamber of the tubular part through the axial hole.
  • the room may contain at least one relay ring ignition.
  • the axial hole of the tubular part may have a diameter substantially equal to that of the strand.
  • the strand may have a length greater than or equal to 50 mm.
  • the strand can enter the tubular part on a length of at least 15 mm.
  • the energetic linear ignition element (s) may be attached to a rear part of a projectile placed in the case.
  • the energetic linear ignition element (s) may alternatively be fixed at a surface internal cylindrical case.
  • the tubular part can be made of a material fuel and / or energy.
  • the initiation means may include a block igniter on which the tubular part will be fixed, block igniter comprising a pyrotechnic component initiation, such as an igniter, and at least one relay ignition.
  • the tubular piece may be integral with a bowl ensuring a closure of the bottom of the case and which will made integral with a cylindrical wall of the case by fixing means.
  • a munition for example of large caliber (greater than 90 mm) for a tank gun, comprises a projectile 2 placed inside a case 3 made of combustible material, for example cardboard impregnated with nitrocellulose.
  • the case contains a propellant charge 4 in the form of a propellant powder in grains and it is closed to its rear part by a metal base 5 carrying a lip sealing 6 in rubber.
  • the case 3 has a bottom 13 in a bowl which marries the form of an internal surface of the base 5.
  • the latter is fixed to the case 3 by means of a spring washer 12 which is housed in a groove 14 carried by an extension axial 15 of base 5.
  • projectile 2 Only the rear part of projectile 2 is shown here and schematically.
  • the projectile carries a empennage 7 and it has a length such that the empennage 7 is found near the base 5 (of the order of 150 mm).
  • the propellant charge ignition device 4 here has three energetic ignition elements linear 8.
  • the strings can be attached to the rear part of projectile 2, for example by bonding or bonding with adhesive tape.
  • the cords can alternatively be glued to the internal cylindrical surface of the combustible case 3 (strings 8a shown in broken lines).
  • cords will be tied on at least part of their length so as to form a strand 9 which is arranged substantially at the axis 21 of the case 3.
  • the length L1 of the strand will preferably be greater than 50 mm which will give a certain rigidity to the strand and will bring its rear end near the bottom of the case.
  • the strings will be chosen so as to present a sufficient rigidity to maintain strand 9 (or well of the line alone) at axis 21.
  • the initiation means comprises a tubular piece of metal 10 which is arranged at the bottom 13 of the case. Concretely this piece 10 is fixed to the base 5 by thread. It defines a cylindrical chamber 11 inside which the strand 9 (or the end of the line if only one line is implemented).
  • the part tubular 10 includes an axial hole 16. This hole is here carried by a cover 17, fixed to the tubular part by thread.
  • the strand 9 enters the tubular part on a length L2 of at least 15 mm.
  • a length of cords in chamber 11 which is sufficient to allow reliable ignition and reproducible from all lines.
  • Such arrangement prevents the strand from coming out of the chamber as a result of transport and setting vibrations ammunition work.
  • Chamber 11 communicates with a component initiation pyrotechnics 18 which is a primer of the type known, initiable electrically or by percussion.
  • a pyrotechnic igniter relay 19 is here interposed between the primer 18 and the strand 9.
  • the room also contains tablets annulars 20 of a pyrotechnic relay composition ignition.
  • tablets of black powder or a pyrotechnic composition classic for example combining Aluminum and copper or boron and potassium nitrate. Tablets 20 are held axially in the tubular part 10 by the screwed cover 17.
  • Relays 19 and 20 will for example be formed by a composition such as: black powder, Aluminum (20% in by mass) / Copper oxide (CuO 80% by mass), Boron (20% by mass) / potassium nitrate (KNO3 80% by mass).
  • Ammunition 1 is assembled in the same way next :
  • the cords 8a are fixed on the surface internal of the case 3, or else the cords 8 are fixed on the projectile 2. During this fixation, the end of the cords so as to form the strand 9.
  • the projectile is fixed to the case by an appropriate means for example a connecting ring as described by EP307307.
  • the propellant powder is finally loaded in introducing the grains of powder through the opening axial of the base 5.
  • the screwing of the tubular part 10 ensures the introduction of the strand 9 into the chamber 11 delimited by the tubular part.
  • the diameter of hole 16 will be chosen greater than that of strand (hole diameter from 4 to 20mm depending on the number of cords) to facilitate the installation of the part tubular.
  • a certain latitude is allowed regarding both the positioning of the strand with respect to the axis 21 of the case as the length of the strand entering chamber 11. This results in a ease of assembly and flexibility of adaptation ignition device given to different types of ammunition.
  • the fixing means can also be different.
  • the tubular part can be glued, crimped or fixed by bayonet mounting. It could be made in one or more pieces.
  • Figure 2 shows another embodiment of a device according to the invention.
  • This mode differs from the previous one mainly by the shape of the tubular part 10 and by the structure of the mode connecting the base 5 to the case 3.
  • the bottom of closure of the case is consisting of a bowl 22, made for example in plastic material such as polyamide.
  • This bowl is made integral with the case 3 by fixing means which here are rivets, regularly distributed angularly (rivets of which only the axes 23 are shown).
  • This bowl 22 has a lateral opening 24 intended to allow the filling of the case with the propellant charge grains 4.
  • the bowl 22 also carries the tubular part 10 which is screwed to an igniter block 25.
  • the bowl 22 has a central collar 26 which is pinched between a bead 27 of the igniter block 25 and a bearing annular 28 of the tubular part 10.
  • Base 5 is fixed to the case after filling powder was made. It has an axial bore smooth 29 which is adjusted on a cylindrical extension rear of the igniter block. The base 5 is in abutment against the bead 27 of the igniter block and it is immobilized with a nut 30 which is screwed onto a threaded part of the rear extension of the igniter block.
  • the nut 30 is completely housed in a counterbore 32 of the base 5. It has holes (not shown) which allow it to be screwed in using a claw wrench known type.
  • the part tubular 10 defines a chamber 11 which receives the strand 9.
  • the igniter block 25 carries a primer 18 and a relay pyrotechnics 19.
  • the tubular part 10 can be made of metal or of plastic material.
  • a sealing function to gases generated by the charge propellant it can also be performed advantageously in a combustible or energetic material for example in a composition combining an oxidant (Potassium nitrate or chlorate) and a binder (polyurethane, epoxy resin).
  • oxidant Potassium nitrate or chlorate
  • binder polyurethane, epoxy resin
  • Ammunition 1 is assembled in the same way next :
  • the cords 8a are fixed on the surface internal of the case 3, or else the cords 8 are fixed on the projectile 2. During this fixation, the end of the cords so as to form the strand 9.
  • the projectile is fixed to the case by an appropriate means for example a connecting ring as described by EP307307.
  • the propellant powder is loaded in introducing the grains of powder through the opening 24 of bowl 22.
  • One of the advantages of this embodiment is that the strand 9 is introduced into chamber 11 of the room tubular 10 before the introduction of the powder. We assure thus a good positioning of the strand which cannot be displaced by grains of powder.
  • the powder grains cannot be lodged around of the strand during loading, the tubular part delimiting a volume around the strand 9.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)

Claims (10)

  1. Zündvorrichtung für eine Treibladung (4), die in einer zylindrischen Hülse (3) einer Munition (1) enthalten ist, wobei die Vorrichtung wenigstens ein lineares, energetisches Zündelement (8, 8a) und eine Mittel zum Initiieren dieses Letzteren umfasst, wobei das Mittel zum Initiieren ein rohrförmiges Glied (10) umfasst, das im Bereich eines Verschluss-Bodens (13, 22) der Hülse angeordnet ist und eine Kammer (11) abgrenzt, die mit einer pyrotechnischen Zusammensetzung zur Initiierung (18) kommuniziert, wobei das rohrförmige Glied ein axiales Loch (16) umfasst, das dafür vorgesehen ist, den Durchgang und den Zugang in die Kammer des oder der linearen Zündelement (8, 8a), die im Wesentlichen im Bereich der Achse (21) der Hülse angeordnet sind, zu ermöglichen, wobei die Vorrichtung dadurch gekennzeichnet ist, dass sie wenigstens zwei energetische, lineare Zündelemente (8, 8a) umfasst, wobei diese Elemente über wenigstens einen Teil ihrer Länge derartig verbunden sind, dass sie eine Litze (9) bilden, die im Wesentlichen im Bereich der Achse (21) der Hülse angeordnet ist und die durch das axiale Loch (16) hindurch in die Kammer (11) des rohrförmigen Glieds (10) eindringt.
  2. Zündvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Kammer (11) wenigstens ein ringförmiges Zündrelais (20) einschließt.
  3. Zündvorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass das axiale Loch (16) des rohrförmigen Glieds (10) einen Durchmesser besitzt, der im Wesentlichen gleich dem der Litze (9) ist.
  4. Zündvorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Litze (9) eine Länge aufweist, die größer oder gleich 50 mm ist.
  5. Zündvorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Litze (9) über eine Länge von wenigstens 15 mm in das rohrförmige Glied (10) eindringt.
  6. Zündvorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das oder die linearen, energetischen Zündelemente (8) im Bereich eines hinteren Abschnittes eines Projektils (2) befestigt sind, das in der Hülse angeordnet ist.
  7. Zündvorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das oder die linearen, energetischen Zündelemente (8a) im Bereich einer inneren, zylindrischen Fläche der Hülse (3) befestigt sind.
  8. Zündvorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das rohrförmige Glied (10) aus einem brennbaren und / oder energetischen Material hergestellt ist.
  9. Zündvorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Mittel zur Initiierung einen Zünd-Block (25) umfassen, an dem das rohrförmige Glied (10) befestigt ist, wobei der Zünd-Block eine pyrotechnische Zusammensetzung zur Initiierung (18), wie einen Zünder, und wenigstens ein Zündrelais (19) umfasst.
  10. Zündvorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das rohrförmige Glied (10) fest mit einer Mulde (22) verbunden ist, die ein Verschließen des Bodens der Hülse (3) gewährleistet und durch Befestigungsmittel fest mit einer zylindrischen Wand der Hülse verbunden ist.
EP00402721A 1999-10-13 2000-10-04 Anzündvorrichtung für eine Treibladung Expired - Lifetime EP1092940B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9912860 1999-10-13
FR9912860A FR2799832B1 (fr) 1999-10-13 1999-10-13 Dispositif d'allumage pour un chargement propulsif

Publications (2)

Publication Number Publication Date
EP1092940A1 EP1092940A1 (de) 2001-04-18
EP1092940B1 true EP1092940B1 (de) 2004-05-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP00402721A Expired - Lifetime EP1092940B1 (de) 1999-10-13 2000-10-04 Anzündvorrichtung für eine Treibladung

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US (1) US6708621B1 (de)
EP (1) EP1092940B1 (de)
DE (1) DE60011011T2 (de)
FR (1) FR2799832B1 (de)
IL (1) IL138992A (de)

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IL138992A (en) 2004-01-04
EP1092940A1 (de) 2001-04-18
US6708621B1 (en) 2004-03-23
FR2799832A1 (fr) 2001-04-20
IL138992A0 (en) 2001-11-25
FR2799832B1 (fr) 2002-08-30
DE60011011T2 (de) 2005-05-25
DE60011011D1 (de) 2004-07-01

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