EP2390617B1 - Gesicherter Zünder - Google Patents

Gesicherter Zünder Download PDF

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Publication number
EP2390617B1
EP2390617B1 EP20110290241 EP11290241A EP2390617B1 EP 2390617 B1 EP2390617 B1 EP 2390617B1 EP 20110290241 EP20110290241 EP 20110290241 EP 11290241 A EP11290241 A EP 11290241A EP 2390617 B1 EP2390617 B1 EP 2390617B1
Authority
EP
European Patent Office
Prior art keywords
plate
detonator
stage
composition
projected
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.)
Active
Application number
EP20110290241
Other languages
English (en)
French (fr)
Other versions
EP2390617A1 (de
Inventor
Gérard Tanguy
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.)
Nexter Munitions SA
Original Assignee
Nexter Munitions 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 Nexter Munitions SA filed Critical Nexter Munitions SA
Publication of EP2390617A1 publication Critical patent/EP2390617A1/de
Application granted granted Critical
Publication of EP2390617B1 publication Critical patent/EP2390617B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F42B3/124—Bridge initiators characterised by the configuration or material of the bridge
    • 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
    • F42B3/113—Initiators therefor activated by optical means, e.g. laser, flashlight

Definitions

  • the technical field of the invention is that of detonators plate or projected element.
  • This type of detonator as described in US6374740 comprises a body in which there is a first stage, or inflammatory stage, comprising at least a first pyrotechnic composition or an explosive secondary explosive.
  • a relay stage comprising at least one secondary explosive.
  • the first composition may be initiatable by an optical means such as an optical fiber or an electrical means (hot wire) while the secondary explosive is initiatable by an impact. This is why a thin metal plate is placed between the two pyrotechnic stages. Following the custom initiation of the first composition, the metal plate is projected onto the secondary explosive which will then be initiated following the energy of the shock provided by the plate.
  • the first composition may react and cause the projection of the plate and thereby the reaction of the secondary explosive and the whole of the pyrotechnic chain.
  • the invention proposes to set up a fuseplatable plate at a temperature below the instability temperature of the igniter stage.
  • the subject of the invention is a detonator comprising a plate projected by an igniter stage comprising at least a first pyrotechnic composition and / or a first explosive on a relay stage comprising at least one secondary explosive, detonator characterized in that the plate projected is made of a fusible material at a temperature below the instability temperature of the igniter stage.
  • the melting temperature T of the plate is at least 15 ° C. lower than the instability temperature of the igniter stage.
  • the plate may be made of a tin-based alloy.
  • the first pyrotechnic composition of the igniter stage may be in contact with the end of an optical fiber.
  • the detonator 1 comprises a substantially cylindrical body 2 having three parts 2a, 2b and 2c.
  • the central portion 2b of the body has an external thread 2d for securing the detonator with a mounting for receiving such a munition (assembly not shown).
  • a sheathed optical fiber 3 passes through the rear part 2a of the body.
  • the optical fiber 3 opens in contact with a first pyrotechnic composition 4 photosensitive forming here the igniter stage of the detonator.
  • a first pyrotechnic composition 4 photosensitive forming here the igniter stage of the detonator.
  • a first pyrotechnic composition 4 a composition combining zirconium and potassium perchlorate. Such a composition is conventional and it is not necessary to describe it in more detail.
  • Other types of pyrotechnic compositions may be used such as: boron / potassium nitrate, boron / zirconium / potassium nitrate .
  • the secondary explosive may be pure or incorporate an optical dopant as described by the patent EP1742009 .
  • a layer of pyrotechnic ignition composition (such as a zirconium / potassium perchlorate composition) in contact with the optical fiber and which ignites a layer of a secondary explosive will be associated with the ignor stage. explosion, for example octogen.
  • pyrotechnic ignition composition such as a zirconium / potassium perchlorate composition
  • the patent EP1306643 describes such an association of an ignition composition and a secondary explosive.
  • the igniter stage comprises a first composition (and / or a secondary explosive explosion) having a particle size perfectly controlled and relatively reduced (less than or equal to 60 micrometers).
  • This first pyrotechnic composition 4 is loaded into a case 5 whose bottom comprises a projectable metal plate 6 (also called projected element 6).
  • the case 5 has an annular area surrounding the rear portion 2a of the body and is welded to the rear portion 2a to seal.
  • the case 5 is thus held in position by a thread 9 solidarisant the rear part of the body 2a to the central part of the body 2b.
  • the metal plate 6 is supported by its periphery on a shoulder of the front portion 2c of the body 2.
  • a secondary explosive 7 sensitive to shock which forms a relay stage.
  • the distance D will be chosen by the person skilled in the art as being that which makes it possible to obtain the optimal projection speed at the shock release of the secondary explosive 7 by virtue of the characteristics of the igniter stage, and therefore especially of the nature and the mass of the first composition 4 and the mass of the plate.
  • the invention proposes that the projectable metal plate is made of a metal or metal alloy whose melting temperature is at least 15 ° C lower than the reaction temperature of the metal.
  • the inflammatory stage thus here the first pyrotechnic composition 4 or, in the case of an inflammatory stage comprising several layers, less than the reaction temperature of the most temperature-sensitive layer (usually the explosive secondary explosive layer).
  • the pyrotechnic compositions and secondary explosives commonly used in this type of detonator which are thermally stable up to at least 230 ° C, the following examples of alloys can be used for producing the projectable plate.
  • lead alloys are also feasible but is not to be favored for environmental and normative reasons.
  • the figure 2 shows the detonator 2 when it has been subjected to a temperature of the order of 215 ° C., ie approximately 15 ° below the reaction temperature of the first pyrotechnic composition 4.
  • the projectable metal plate 6 has melted at this temperature T while the first composition 4 has remained stable. If the temperature continues to increase up to the instability temperature of the first composition 4, it will react but it will not be able to project the plate 6 which will not cause the detonation of the explosive 7. In the case the most unfavorable, the secondary explosive 7 will be able to deflagrate what will not be enough to trigger the continuation of the pyrotechnic chain.
  • the plate 6 as a pinch between the case 5 and the front portion 2c of the body 2.
  • the plate 6 could be secured to the case and form for example a closing flap closing this case. In this case the outer edge of the case will be crimped on the plate 6.
  • the invention has also been described with an igniter stage initiated by an optical fiber.
  • the invention can also be implemented with an igniter stage initiated in a more conventional manner by the electrical energy, for example a hot-wire or exploded-wire igniter.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Air Bags (AREA)

Claims (8)

  1. Sprengzünder (1) umfassend eine Platte (6), welche durch einen Stufenzünder weggeschleudert wird, welcher wenigstens eine erste pyrotechnische Zusammensetzung und/oder einen ersten Sprengstoff (4) umfasst und auf einer Relaisstufe wenigstens einen sekundären Sprengstoff (7) umfasst, wobei der Sprengzünder (1) dadurch gekennzeichnet ist, dass die wegzuschleudernde Platte (6) aus einem Material ausgeführt ist, das bei einer Temperatur T kleiner als die Instabilitätstemperatur des Stufenzünders schmilzt.
  2. Sprengzünder (1) mit wegzuschleudernder Platte (6) nach Anspruch 1, dadurch gekennzeichnet, dass die Schmelztemperatur T der Platte (6) wenigstens 15 °C niedriger als die Instabilitätstemperatur des Stufenzünders (4) ist.
  3. Sprengzünder (1) mit wegzuschleudernder Platte (6) nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Platte (6) aus einer auf Zinn (Sn) basierenden Legierung ausgeführt ist.
  4. Sprengzünder (1) mit wegzuschleudernder Platte (6) nach Anspruch 3, dadurch gekennzeichnet, dass die Platte (6) aus einer Legierung der Zusammensetzung SnAg3.4Bi4.8 ausgeführt ist.
  5. Sprengzünder (1) mit wegzuschleudernder Platte (6) nach Anspruch 3, dadurch gekennzeichnet, dass die Platte aus einer Legierung der Zusammensetzung SnBi7.5Ag2.0 ausgeführt ist.
  6. Sprengzünder (1) mit wegzuschleudernder Platte (6) nach Anspruch 3, dadurch gekennzeichnet, dass die Platte aus einer Legierung der Zusammensetzung SnZn9 ausgeführt ist.
  7. Sprengzünder (1) mit wegzuschleudernder Platte (6) nach Anspruch 3, dadurch gekennzeichnet, dass die Platte (6) aus einer Legierung der Zusammensetzung SnznBBi3 ausgeführt ist.
  8. Sprengzünder (1) mit wegzuschleudernder Platte (6) nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die erste pyrotechnische Zusammensetzung des Stufenzünders mit dem Ende einer Glasfaser in Berührung ist.
EP20110290241 2010-05-31 2011-05-25 Gesicherter Zünder Active EP2390617B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1002316A FR2960541B1 (fr) 2010-05-31 2010-05-31 Detonateur securise

Publications (2)

Publication Number Publication Date
EP2390617A1 EP2390617A1 (de) 2011-11-30
EP2390617B1 true EP2390617B1 (de) 2013-03-13

Family

ID=43532926

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110290241 Active EP2390617B1 (de) 2010-05-31 2011-05-25 Gesicherter Zünder

Country Status (2)

Country Link
EP (1) EP2390617B1 (de)
FR (1) FR2960541B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114353600B (zh) * 2022-01-17 2024-01-16 中北大学 一种隔片式高安全小尺寸激光起爆装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3062143A (en) * 1959-11-02 1962-11-06 Armour Res Found Detonator
FR2796142B1 (fr) * 1999-07-06 2002-08-09 Saint Louis Inst Detonateur optique a deux etages et a transition choc-detonation
FR2831659B1 (fr) * 2001-10-26 2004-04-09 Saint Louis Inst Detonateur optique basse energie
FR2888234B1 (fr) * 2005-07-05 2008-05-02 Saint Louis Inst Composition energetique dopee optiquement
FR2914056B1 (fr) * 2007-03-21 2010-03-12 Nexter Munitions Initiateur opto pyrotechnique

Also Published As

Publication number Publication date
FR2960541B1 (fr) 2012-05-04
EP2390617A1 (de) 2011-11-30
FR2960541A1 (fr) 2011-12-02

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