WO2012140394A1 - Projectile explosif - Google Patents

Projectile explosif Download PDF

Info

Publication number
WO2012140394A1
WO2012140394A1 PCT/GB2012/000307 GB2012000307W WO2012140394A1 WO 2012140394 A1 WO2012140394 A1 WO 2012140394A1 GB 2012000307 W GB2012000307 W GB 2012000307W WO 2012140394 A1 WO2012140394 A1 WO 2012140394A1
Authority
WO
WIPO (PCT)
Prior art keywords
shock tube
explosive
projectile
shock
detonator
Prior art date
Application number
PCT/GB2012/000307
Other languages
English (en)
Inventor
Andrew Laing
Robert William TORRY
Original Assignee
The Secretary Of State For Defence
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 The Secretary Of State For Defence filed Critical The Secretary Of State For Defence
Publication of WO2012140394A1 publication Critical patent/WO2012140394A1/fr

Links

Classifications

    • 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
    • F42C19/0807—Primers; Detonators characterised by the particular configuration of the transmission channels from the priming energy source to the charge to be ignited, e.g. multiple channels, nozzles, diaphragms or filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C1/00—Impact fuzes, i.e. fuzes actuated only by ammunition impact
    • F42C1/02—Impact fuzes, i.e. fuzes actuated only by ammunition impact with firing-pin structurally combined with fuze
    • F42C1/08—Impact fuzes, i.e. fuzes actuated only by ammunition impact with firing-pin structurally combined with fuze with delayed action after ignition of fuze or after impact
    • 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
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C9/00—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition
    • F42C9/02—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition the timing being caused by mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C9/00—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition
    • F42C9/14—Double fuzes; Multiple fuzes
    • F42C9/142—Double fuzes; Multiple fuzes combined time and percussion fuzes in which the timing is caused by combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping

Definitions

  • This invention relates to an explosive projectile having a delay fuse, and is applicable to short and long range projectiles.
  • shock tubing and shock tube detonators are used to safely ignite an explosive from a distance.
  • Shock tubing is preferred in such industries because it removes the electrical cable based initiation systems for explosives and is insensitive to electrostatic charges from humans, therefore safe to handle when manual assembly is required.
  • US 6272996 Bl also indicates the use of shock tubing within military fields for similar purpose as the mining and demolition industries namely to provide a means of initiating a remote explosive device from a safe distance.
  • shock tubing such as a plastic tube housing containing a fibre coated by aluminium or ammonium perchlorate
  • others comprise a gas filled plastic tubing
  • the most popular commercially used version is generally known to consist of small diameter hollow plastic tubing with a fine coating of combustible material layered onto the inside of the tubing.
  • Initiation of the shock tube can be carried out in a number of ways.
  • There are several methods to initiate the shock tube if the end of the shock tube it left open, the open end may be filled with primer and initiated by purpose built initiation devices such as disclosed in US 2007/0266881 Al. It is the shock wave from the primer explosive that ignites the combustible material within the plastic tubing.
  • shock tube detonators normally contain a delay element themselves and are commercially available with varying delays from a few milliseconds up to several seconds.
  • shock tube and shock tube detonator can provide a reasonable delay before a main charge is initiated.
  • This combination of shock tube and shock tube detonator also provides for a means of separating the primary charge and main explosive charge to ensure the initiation of each occurs separately and are commercially available at much less cost than bespoke projectile delay fuses.
  • Shock tube detonators can be commercially supplied already connected to one end of a length of shock tube, the shock tube can then be cut to the desired length dependent on its end purpose.
  • the invention addresses the problems of projectile delay fuses as defined above by providing a simple and cost effective delay mechanism which can be adjusted to the need of the user and which is safe to handle and assemble manually.
  • an explosive projectile comprising a delay fuse wherein the delay fuse comprises: a shock tube, a shock tube detonator and means to initiate the shock tube.
  • the invention uses a shock tube and shock tube detonator as a simple cheap commercially available alternative to bespoke electronic or mechanical delay fuses for projectiles.
  • the invention also allows the separation of the primary means of initiation such as a primer charge and the main charge in a projectile. Because shock tube and shock tube detonators are safe to handle by humans, projectile devices may be packed with explosives and assembled manually. With the shock tube detonator already connected to one end of a length of shock tube, the shock tube detonator can be inserted into a main charge of a projectile. The opposite end of the shock tube to the shock tube detonator should be positioned within proximity of the initiation means.
  • the initiation means could be an electrical spark, a primary explosive charge or detonator, percussion cap or other means familiar to a person skilled in the art.
  • the shock tube and shock tube detonator can be used as a delay fuse within a longer range projectile. This is because the delay fuse is only initiated on impact after the projectile has completed its flight path.
  • the mechanical impact fuse and impact sensitive explosive can be situated in the front end of a projectile and once impact occurs, the projectile may continue to travel whilst the mechanical impact fuse initiates the impact sensitive explosive.
  • the impact sensitive explosive will in turn initiate the shock tube and then the shock tube detonator will initiate the main charge.
  • several mechanical impact fuses can be used in conjunction with an impact sensitive explosive. Examples would be a piezoelectric fuse or a percussion cap for example as used in rocket propelled grenades. Brief Description of Drawings
  • Figure 1 shows an explosive projectile suitable forclearing mines buried in the ground.
  • Figure 2 shows an exploded view of the internal component parts of the explosive projectile shown in figure 1.
  • Figures 1 and 2 relate to a short range embodiment of an explosive projectile.
  • Figure 1 is one embodiment of the invention and shows an explosive projectilel.
  • the explosive projectilel comprises an elongated spike 2 a flyer plate 3, a casing 4 and an electric detonator 5.
  • the casing 4 and elongated spike 2 contain explosive components (not shown) including a thin sheet of explosive material, a shock tube and a shock tube detonator, which are initiated once the electric detonator 5 is activated by means of an electric signal.
  • the flyer plate 3 is attached to the elongated spike 2 to provide a robust platform to transfer explosive energy to the elongated spike 2 after initiation of the electric detonator 5.
  • FIG. 2 illustrates the internal components 10 of the embodiment as shown in figure 1.
  • the internal components 10 have been separated in the diagram to aid understanding of the explosive projectile's construction.
  • the electric detonator 5 is embedded into a thin sheet of explosive material 6.
  • the explosive material 6 is positioned in contact with a foam spacer 7.
  • the foam spacer 7 has a groove cut out to allow a shock tube 8 to be held in position against the flyer plate 3.
  • the open end of the shock tube is aligned with the edges of the sheet of explosive 6 ; the foam spacer 7 and the flyer plate 3.
  • the opposite end of the shock tube 8 is connected to a shock tube detonator (not shown) which is enclosed within a main charge 9.
  • a hole is situated in the centre of the flyer plate 3 to enable the shock tube 8 to run from the flyer plate 3 to the main charge 9.
  • the electric detonator 5 initiates the sheet of explosive 6.
  • the rapid combustion of the sheet of explosive 6 generates an explosive force that compresses the shock tube 8 against the flyer plate 3 and propels the flyer plate 3 and elongated spike 2 (shown in figure 1) towards a selected target.
  • the compressive force of the explosive shock wave initiates the combustible material contained within the shock tube 8 and in turn the shock tube detonator initiates the main charge 9.
  • the initiation of the main charge 9 will be delayed; the delay is dependent on the inherent delay associated with the selection of the type of shock tube, the length of shock tube, internal combustible material used within the shock tube and the shock tube detonator.
  • inventive concept can also be applied to a longer range explosive projectile.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

La présente invention a trait à un projectile explosif qui incorpore un fusible temporisé qui est approprié pour les projectiles explosifs de courte et de longue portée. Le fusible temporisé utilise une construction simple et peut être construit à partir de composants disponibles dans le commerce.
PCT/GB2012/000307 2011-04-11 2012-04-03 Projectile explosif WO2012140394A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1106126.4 2011-04-11
GBGB1106126.4A GB201106126D0 (en) 2011-04-11 2011-04-11 An explosive projectile

Publications (1)

Publication Number Publication Date
WO2012140394A1 true WO2012140394A1 (fr) 2012-10-18

Family

ID=44122939

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2012/000307 WO2012140394A1 (fr) 2011-04-11 2012-04-03 Projectile explosif

Country Status (2)

Country Link
GB (2) GB201106126D0 (fr)
WO (1) WO2012140394A1 (fr)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1416936A (en) 1972-01-24 1975-12-10 Israel Ministry Of Defence Delay fuse for a projectile
DE2954288C1 (de) * 1979-10-27 1984-05-30 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Munition
EP0709646A1 (fr) * 1994-10-26 1996-05-01 Tda Armements S.A.S. Fusée d'impact à double sécurité
US6032567A (en) 1998-03-16 2000-03-07 The United States Of America As Represented By The Secretary Of The Navy Surf zone mine clearance
US6272996B1 (en) 1998-10-07 2001-08-14 Shock Tube Systems, Inc. In-line initiator and firing device assembly
US20040069133A1 (en) 2001-02-16 2004-04-15 Brett Lowery Mine excavation method and apparatus
US20070266881A1 (en) 2006-05-22 2007-11-22 Scott Allman Shock tube initiator
US20090193995A1 (en) 2008-01-31 2009-08-06 Bae Systems Information And Electronic Systems Integration Inc. Inertial delay fuse
US20090260533A1 (en) 2008-02-26 2009-10-22 Junghans Microtec Gmbh Fuse for a projectile
WO2010056419A1 (fr) * 2008-11-17 2010-05-20 Raytheon Company Charge militaire à fragmentation à double masse et à mise à feu frontale et latérale

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US657849A (en) * 1899-12-19 1900-09-11 Henry Edward Aykroyd Process of mercerizing.
CA2161566A1 (fr) * 1995-10-27 1997-04-28 Phil O'garr Dispositif pyrotechnique

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1416936A (en) 1972-01-24 1975-12-10 Israel Ministry Of Defence Delay fuse for a projectile
DE2954288C1 (de) * 1979-10-27 1984-05-30 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Munition
EP0709646A1 (fr) * 1994-10-26 1996-05-01 Tda Armements S.A.S. Fusée d'impact à double sécurité
US6032567A (en) 1998-03-16 2000-03-07 The United States Of America As Represented By The Secretary Of The Navy Surf zone mine clearance
US6272996B1 (en) 1998-10-07 2001-08-14 Shock Tube Systems, Inc. In-line initiator and firing device assembly
US20040069133A1 (en) 2001-02-16 2004-04-15 Brett Lowery Mine excavation method and apparatus
US20070266881A1 (en) 2006-05-22 2007-11-22 Scott Allman Shock tube initiator
US20090193995A1 (en) 2008-01-31 2009-08-06 Bae Systems Information And Electronic Systems Integration Inc. Inertial delay fuse
US20090260533A1 (en) 2008-02-26 2009-10-22 Junghans Microtec Gmbh Fuse for a projectile
WO2010056419A1 (fr) * 2008-11-17 2010-05-20 Raytheon Company Charge militaire à fragmentation à double masse et à mise à feu frontale et latérale

Also Published As

Publication number Publication date
GB2490020B (en) 2013-10-23
GB201205858D0 (en) 2012-05-16
GB201106126D0 (en) 2011-05-25
GB2490020A (en) 2012-10-17

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