EP2053344A1 - Energetische Ladung mit kontrollierter Entsicherung und Munition, die mit einer solchen Ladung ausgerüstet ist - Google Patents

Energetische Ladung mit kontrollierter Entsicherung und Munition, die mit einer solchen Ladung ausgerüstet ist Download PDF

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Publication number
EP2053344A1
EP2053344A1 EP08167443A EP08167443A EP2053344A1 EP 2053344 A1 EP2053344 A1 EP 2053344A1 EP 08167443 A EP08167443 A EP 08167443A EP 08167443 A EP08167443 A EP 08167443A EP 2053344 A1 EP2053344 A1 EP 2053344A1
Authority
EP
European Patent Office
Prior art keywords
load
envelope
deconfinement
parts
charge
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.)
Granted
Application number
EP08167443A
Other languages
English (en)
French (fr)
Other versions
EP2053344B1 (de
Inventor
Christophe Bar
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.)
TDA Armements SAS
Original Assignee
TDA Armements SAS
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 TDA Armements SAS filed Critical TDA Armements SAS
Publication of EP2053344A1 publication Critical patent/EP2053344A1/de
Application granted granted Critical
Publication of EP2053344B1 publication Critical patent/EP2053344B1/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
    • F42B39/00—Packaging or storage of ammunition or explosive charges; Safety features thereof; Cartridge belts or bags
    • F42B39/14—Explosion or fire protection arrangements on packages or ammunition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B39/00—Packaging or storage of ammunition or explosive charges; Safety features thereof; Cartridge belts or bags
    • F42B39/20—Packages or ammunition having valves for pressure-equalising; Packages or ammunition having plugs for pressure release, e.g. meltable ; Blow-out panels; Venting arrangements

Definitions

  • the present invention relates to a device comprising a controlled deconfinement energy charge. It also relates to a munition equipped with such a load. It applies in particular for securing ammunition by deconfining the explosive charge.
  • a real case of slow heating may be that of a load placed in a cargo hold near a fire.
  • An object of the invention is in particular to minimize the reaction of a munition subjected to this aggression.
  • the subject of the invention is a device comprising an energetic charge confined in an envelope, characterized in that the charge expands during a phase change to a temperature below its decomposition temperature, the envelope comprises at least two parts connected by a mechanical connection adapted to break under the effect of the internal pressure of the casing caused during a change of phase of the load.
  • the phase change of the load is for example a merger.
  • the two parts deviate from one another after breaking the connection and then maintain for example a constant gap causing an opening of the envelope.
  • the loading comprises trinitrotoluene.
  • the two parts are for example assembled by means of pins.
  • the invention also relates to a munition equipped with a device as described above.
  • the figure 1 illustrates, by a cross section, a first example of a munition containing a confinement of an explosive charge.
  • This is a core generation load of conventional construction.
  • This load mainly comprises a firing device 1, the explosive charge 2, a means 3 for shaping a shock wave, a coating 4 and a confinement envelope 5.
  • the concave-shaped coating closes the envelope 5 of cylindrical shape to confine the explosive charge 2.
  • the coating 4 is projected to become a projectile 6 intended to impact or penetrate a target.
  • Deconfinement devices have emerged as an interesting solution to achieve safety objectives, especially for the slow heating test. Two factors are used to trigger deconfinement, temperature rise, or pressure rise.
  • the devices for increasing the temperature include a mechanical connecting element losing its mechanical characteristics from a certain temperature, generally of the order of 120 ° C. Beyond this temperature, the breaking of the connection, under the effect of a low effort, allows the deconfinement of the energy loading of a munition.
  • the degradation temperature of the mechanical connecting element is chosen sufficiently far from the decomposition temperature of the load.
  • Pressure-relieving decontainment devices include a weakened mechanical bond, which under the effect of internal pressure breaks. This then allows a deconfinement of the energy loading of the munition. This overpressure is obtained at the very beginning of decomposition of the energetic charge before this one transits in detonating regime. These devices are more critical since their operation requires the beginning of decomposition of energy loading. Potentially they generate larger projections that will have to be trapped by an ancillary means, for example a package.
  • the figure 2 presents another example of a generator that can be incorporated in a munition.
  • This generator 21 presented in a cross section, has an energy charge 2 confined within a metal envelope 22.
  • the envelope 22 is for example formed of at least two parts 221, 222 interconnected by a mechanical connection 25 being able to break.
  • this mechanical connection 25 is for example made by connecting pins mechanically securing the two parts 221, 222.
  • the second portion 222 forms for example the base of the generator.
  • a rocket 24 is for example fixed at the front of these two parts 221, 222.
  • a deconfinement according to the invention advantageously uses the phase change of material forming the energy charge 2, this phase change following a rise in temperature.
  • TNT trinitrotoluene or tolite
  • TNT is an ammunition loading explosive.
  • the melting temperature of TNT is of the order of 80 ° C, its decomposition temperature is of the order of 290 ° C.
  • a 120 mm caliber ammunition of the type represented for example on the figure 2 may have a volume available for loading approximately 2.7 dm 3 .
  • This then causes an increase of 0.24 dm 3 in volume.
  • the shearing of the fixing pins of the base 222 makes it possible to limit this rise to a few tens of bars.
  • FIGS. 3a and 3b illustrate an embodiment of the mechanical connection between the two parts 221, 222 of the metal casing 22.
  • the figure 3a represents the connection before breaking of the pins 31 holding the two parts in the closed position.
  • the two parts having at least one projection 32, 33, the second portion 222, for example the base, is rotatably engaged in the first part so that the two projections are vis-à-vis.
  • the figure 3b represents the envelope in the open position, after deconfinement controlled by rupture of the pins 31.
  • the two parts 221, 222 are spaced a few tens of centimeters thus opening the envelope.
  • the two parts are held in this open position, spaced apart, because at least of the projection 32 of the first portion 221 which retains the cap 222 by contact with the projection 33 thereof.
  • the figure 4 illustrates an example of a system 41 of pin connection 42.
  • the rear portion 222 and fixed to the front portion 221 by means of pins 42.
  • the rear portion 222 is fitted into the front portion 221, the pins 42 passing through the walls so nested to keep them fixed.
  • the portions 221 and 222 form a single block.
  • the link break can be done for example at the front, between this block 221, 222 and a part 44 fixed by threading 43, for example a rocket.
  • the thread 43 is then designed to break under the effect of the internal pressure rise caused during a phase change of the load 2.
  • the invention has been described for a munition of the type of the figure 2 or from figure 4 but it may also apply to other munitions, other machines equipped with an explosive charge, for example of the type of figure 1 .
  • the invention has also been described for TNT based charging, but it can be applied to other phase change energy charges.
  • its melting temperature is very far from its decomposition temperature, this distance serving as a margin of safety of the device.
  • the coefficient of expansion induced by the phase change is large enough to cause significant stresses in the structure of the munition, in particular to lead to a controlled and predetermined opening by munition design, as illustrated for example by the Figures 3a and 3b .

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Catching Or Destruction (AREA)
  • Carpets (AREA)
  • Air Bags (AREA)
  • Battery Mounting, Suspending (AREA)
  • Fuses (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP08167443A 2007-10-23 2008-10-23 Energetische Ladung mit kontrollierter Entsicherung und Munition, die mit einer solchen Ladung ausgerüstet ist Active EP2053344B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0707415A FR2922638B1 (fr) 2007-10-23 2007-10-23 Chargement energetique a deconfinement controle et munition equipee d'un tel chargement

Publications (2)

Publication Number Publication Date
EP2053344A1 true EP2053344A1 (de) 2009-04-29
EP2053344B1 EP2053344B1 (de) 2010-12-29

Family

ID=39512628

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08167443A Active EP2053344B1 (de) 2007-10-23 2008-10-23 Energetische Ladung mit kontrollierter Entsicherung und Munition, die mit einer solchen Ladung ausgerüstet ist

Country Status (5)

Country Link
EP (1) EP2053344B1 (de)
AT (1) ATE493628T1 (de)
DE (1) DE602008004201D1 (de)
ES (1) ES2361454T3 (de)
FR (1) FR2922638B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2846124A1 (de) * 2013-09-05 2015-03-11 Diehl BGT Defence GmbH & Co. Kg Geschoss

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3090086B1 (fr) 2018-12-13 2020-12-11 Thales Sa Dispositif de deconfinement d’un chargement explosif et munition equipee d’un tel dispositif

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2656085A1 (fr) 1987-10-13 1991-06-21 Thomson Brandt Armements Munition explosive protegee contre l'elevation de temperature.
EP0545764A1 (de) * 1991-11-29 1993-06-09 Thomson-Brandt Armements Verriegelungsvorrichtung einer Hülse die pyrotechnische Materialien enthält
EP0738869A1 (de) * 1995-04-18 1996-10-23 Protac Entsichern eines militärischen Explosivkörpers mittels unterschiedlicher Ausdehnungskoeffizienten
WO2008040860A2 (fr) * 2006-09-29 2008-04-10 Nexter Munitions Dispositif de deconfinement d'une enveloppe d'une munition

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2656085A1 (fr) 1987-10-13 1991-06-21 Thomson Brandt Armements Munition explosive protegee contre l'elevation de temperature.
EP0545764A1 (de) * 1991-11-29 1993-06-09 Thomson-Brandt Armements Verriegelungsvorrichtung einer Hülse die pyrotechnische Materialien enthält
EP0738869A1 (de) * 1995-04-18 1996-10-23 Protac Entsichern eines militärischen Explosivkörpers mittels unterschiedlicher Ausdehnungskoeffizienten
WO2008040860A2 (fr) * 2006-09-29 2008-04-10 Nexter Munitions Dispositif de deconfinement d'une enveloppe d'une munition

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2846124A1 (de) * 2013-09-05 2015-03-11 Diehl BGT Defence GmbH & Co. Kg Geschoss
EP2846124B1 (de) 2013-09-05 2018-06-06 Diehl Defence GmbH & Co. KG Geschoss

Also Published As

Publication number Publication date
EP2053344B1 (de) 2010-12-29
ES2361454T3 (es) 2011-06-17
FR2922638B1 (fr) 2013-07-05
ATE493628T1 (de) 2011-01-15
FR2922638A1 (fr) 2009-04-24
DE602008004201D1 (de) 2011-02-10

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