EP3688402A1 - Chargement comprenant une charge explosive insensible - Google Patents
Chargement comprenant une charge explosive insensibleInfo
- Publication number
- EP3688402A1 EP3688402A1 EP18788813.6A EP18788813A EP3688402A1 EP 3688402 A1 EP3688402 A1 EP 3688402A1 EP 18788813 A EP18788813 A EP 18788813A EP 3688402 A1 EP3688402 A1 EP 3688402A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- explosive charge
- critical diameter
- charge
- transmission element
- explosive
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B1/00—Explosive charges characterised by form or shape but not dependent on shape of container
- F42B1/04—Detonator charges not forming part of the fuze
-
- 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
- F42B12/20—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type
- F42B12/207—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type characterised by the explosive material or the construction of the high explosive warhead, e.g. insensitive ammunition
-
- 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
Definitions
- the present invention relates to an explosive charge for operating an insensitive explosive charge having a high critical diameter.
- the performance / vulnerability compromise objectives of current weapon systems can lead to implementing insensitive explosive compositions that have relatively high critical diameters.
- an explosive composition with a large critical diameter may require the implementation of a relatively complex and voluminous initiation structure.
- a priming structure can be problematic insofar as it can, on the one hand, result in a reduction of the useful volume that can actually be occupied by the explosive composition, and, on the other hand, an increase in the vulnerability of the weapon system.
- the invention aims to meet the aforementioned drawbacks and proposes an explosive load comprising:
- a transmission element of a detonation wave comprising at least one transmission line of the detonation wave, each transmission line comprising at least one through aperture formed in the thickness of the transmission element, and channel opening into said through aperture, a detonation wave propagation material being present in said channel and said aperture, said propagation material having a first critical diameter
- explosive having a third critical diameter greater than or equal to the first critical diameter and less than the second critical diameter.
- the invention is remarkable in that a second explosive charge of relatively small critical diameter is interposed between the first explosive charge, which constitutes an insensitive composition of high critical diameter, and the transmission element.
- the presence of the second explosive charge makes it possible to guarantee the initiation of the first explosive charge, which constitutes an insensitive charge, without requiring the use of a voluminous priming structure, and without degrading the vulnerability of the ammunition.
- the critical diameters can be measured by the method of stepped specimens, according to the AFNOR standard, Paris NF T70-701 December 1995.
- the first critical diameter is less than or equal to 2 mm, or even less than or equal to 1 mm,
- the second critical diameter is greater than or equal to 16 mm, or even greater than or equal to 30 mm, and
- the third critical diameter is between 1 mm and 5 mm.
- the first explosive charge, the second explosive charge, the transmission element and the detonator are superimposed.
- the second explosive charge may be in the form of a sheet.
- Such a feature is advantageous in order to minimize the volume occupied by the second explosive charge, and thus maximize the useful volume that can be occupied by the first explosive charge.
- the transmission element is located around the detonator, the second explosive charge around the transmission element and the first explosive charge around the second explosive charge.
- the second explosive charge may comprise at least one energy charge at the rate of at least
- FIG. 1 schematically and partially shows a sectional view of a first example of an explosive load according to the invention
- FIG. 2 represents an exemplary detonation-initiated detonation wave transmission element for driving the detonation wave to the second explosive charge
- FIG. 3 shows, schematically and partially, a sectional view of a second example of an explosive load according to the invention.
- FIG. 1 schematically illustrates a first example of an explosive charge 1 according to the invention in the form of a plurality of superimposed elements.
- the load 1 is present inside a body 10, laterally delimiting the load 1.
- the load 1 comprises a detonator 3 which may be in contact with a transmission element 7 of a detonation wave.
- the load 1 may comprise a single detonator 3.
- the load 1 may comprise a single transmission element 7.
- the transmission element 7 implemented in the load 1 is illustrated in FIG. 2.
- the element 7 comprises a plurality of lines 17a, 17b, 17c and 17d for transmitting the detonation wave.
- Each transmission line 17a-17d has several through holes 170a, 170b, 170c and 170d formed in the thickness of the transmission element 7. These openings 170a-170d open on the second explosive charge 9.
- Each transmission line 17a 17d further comprises at least one channel 171a, 171b, 171c and 171d, each of these channels 171a-171d opening into several openings through 170a-170d.
- the ducts 171a-171d are formed on the surface of the transmission element 7, on the detonator 3 side.
- the ducts 171a-171d and the through openings 170a 170d comprise a propagation material M of the detonation wave.
- This propagation material M of the detonation wave may for example be Formex®.
- the material M allows the detonation wave (arrow F in FIG. 1) coming from the detonator 3 to propagate in the channels 171a-171d and through the openings 170a-170d to be transmitted to the second explosive charge 9, then to the first explosive charge 5.
- the second explosive charge 9 may be in contact with the transmission element 7.
- the transmission element 7 may be located between the second explosive charge 9 and the detonator 3.
- the layer formed by the second explosive charge 9 is interposed between the transmission element 7 and the first explosive charge 5.
- the second explosive charge 9 is here in the form of a sheet.
- the second explosive charge 9 may comprise at least one energy charge at a rate of at least 80% by mass.
- the energy charge is known per se and can, for example, be chosen from: hexogen (RDX), octogen (HX), hexanitrohexaazaisowurtzitane (CL20), ammonium dinitroamidide (DNA), trinitropyrazole ( TNP) and their mixtures.
- the second explosive charge 9 may, for example, be Formex® or Hexosheet®.
- the first explosive charge 5 may be in contact with the second explosive charge 9.
- the detonation wave F propagating from the detonator 3 in the transmission element 7 is thus transmitted first to the second explosive charge 9, then to the first explosive charge 5.
- the thickness e 2 of the second explosive charge 9 may, as illustrated, be less than the thickness ei of the first explosive charge, and for example be less than or equal to half or even tenth, of this thickness ei.
- the propagation material M has a first critical diameter, the first explosive charge 5 a second critical diameter and the second explosive charge 9 a third critical diameter.
- the second critical diameter is greater than the first critical diameter
- the third critical diameter is greater than or equal to the first critical diameter but smaller than the second critical diameter.
- a second example of an explosive charge 100 according to the invention will now be described with reference to FIG.
- This second example of explosive charge 100 has a "cylindrical" geometry.
- the load 100 is present inside a body 101, laterally delimiting the load 100.
- the transmission element 700 has the shape of an inner peripheral wall and surrounds the detonator 300.
- the transmission element 700 may be in contact with the detonator 300.
- the transmission element 700 comprises at least one channel and through aperture filled with a propagation material of the detonation wave for transmitting the detonation wave from the detonator 300.
- the second explosive charge 900 may be located in contact with the transmission element 700 and surround it.
- the first explosive charge 500 may be located in contact with the second explosive charge 900 and surrounds the latter.
- the critical diameters of the first and second explosive charges and propagation material are as described above.
- An explosive charge according to the invention has been made which comprises a first high critical diameter explosive charge, a transmission element of the detonation wave filled with propagation material, and a second interposed explosive charge.
- the explosive charge used had the configuration shown in Figure 1.
- the first high critical diameter explosive charge was a composition marketed under the reference B2258B by Eurenco.
- the critical diameter of this first explosive charge (second critical diameter) was 18 mm.
- the first explosive charge was in the form of a cylinder with a diameter of 60 mm and a height of 30 mm.
- the detonation wave transmission element comprised a plurality of conduction channels, each filled with a Formex® propagation material having a first critical diameter. equal to 1 mm.
- the transmission element used in this test had the configuration shown in Figure 2.
- the second explosive charge was interposed between the first explosive charge and the transmission element as shown schematically in FIG. 1.
- This second charge consisted of a Formex® explosive having a third critical diameter equal to 1 mm.
- the second explosive charge was in the form of a layer having a diameter of 60 mm and a thickness of 4 mm in the test carried out.
- the first explosive charge could be initiated using the detonator in the explosive charge that has just been described.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Carbon And Carbon Compounds (AREA)
- Fats And Perfumes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1700983A FR3071600B1 (fr) | 2017-09-25 | 2017-09-25 | Chargement comprenant une charge explosive insensible |
| PCT/FR2018/052319 WO2019058072A1 (fr) | 2017-09-25 | 2018-09-21 | Chargement comprenant une charge explosive insensible |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3688402A1 true EP3688402A1 (fr) | 2020-08-05 |
| EP3688402B1 EP3688402B1 (fr) | 2023-03-29 |
Family
ID=61655805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18788813.6A Active EP3688402B1 (fr) | 2017-09-25 | 2018-09-21 | Chargement comprenant une charge explosive insensible |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3688402B1 (fr) |
| ES (1) | ES2948289T3 (fr) |
| FR (1) | FR3071600B1 (fr) |
| PL (1) | PL3688402T3 (fr) |
| WO (1) | WO2019058072A1 (fr) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5187319A (en) * | 1990-09-20 | 1993-02-16 | Societe Nationale Des Poudres Et Explosifs | Low vulnerability component of explosive ammunition and process for initiating a charge of low-sensitivity composite explosive |
| GB2517660B (en) * | 1994-11-03 | 2015-07-22 | Nexter Munitions | Priming device for an explosive charge |
| FR2817955B1 (fr) * | 2000-12-13 | 2003-05-16 | Giat Ind Sa | Dispositif d'amorcage pour charge explosive et charge formee incorporant un tel dispositif d'amorcage |
-
2017
- 2017-09-25 FR FR1700983A patent/FR3071600B1/fr active Active
-
2018
- 2018-09-21 WO PCT/FR2018/052319 patent/WO2019058072A1/fr not_active Ceased
- 2018-09-21 EP EP18788813.6A patent/EP3688402B1/fr active Active
- 2018-09-21 PL PL18788813.6T patent/PL3688402T3/pl unknown
- 2018-09-21 ES ES18788813T patent/ES2948289T3/es active Active
Also Published As
| Publication number | Publication date |
|---|---|
| FR3071600A1 (fr) | 2019-03-29 |
| WO2019058072A1 (fr) | 2019-03-28 |
| FR3071600B1 (fr) | 2019-10-11 |
| ES2948289T3 (es) | 2023-09-07 |
| PL3688402T3 (pl) | 2023-08-21 |
| EP3688402B1 (fr) | 2023-03-29 |
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