WO2007132246A1 - Interrupteur de détonation - Google Patents

Interrupteur de détonation Download PDF

Info

Publication number
WO2007132246A1
WO2007132246A1 PCT/GB2007/001812 GB2007001812W WO2007132246A1 WO 2007132246 A1 WO2007132246 A1 WO 2007132246A1 GB 2007001812 W GB2007001812 W GB 2007001812W WO 2007132246 A1 WO2007132246 A1 WO 2007132246A1
Authority
WO
WIPO (PCT)
Prior art keywords
barrel
disruptor
mould
cartridge
breech
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.)
Ceased
Application number
PCT/GB2007/001812
Other languages
English (en)
Inventor
Andrew Tyas
James Arthur Warren
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.)
Blastech Ltd
Original Assignee
Blastech Ltd
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 Blastech Ltd filed Critical Blastech Ltd
Priority to US12/301,162 priority Critical patent/US20090178548A1/en
Priority to EP07732835A priority patent/EP2021726A1/fr
Priority to CA002652589A priority patent/CA2652589A1/fr
Publication of WO2007132246A1 publication Critical patent/WO2007132246A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B9/00—Liquid ejecting guns, e.g. water pistols, devices ejecting electrically charged liquid jets, devices ejecting liquid jets by explosive pressure
    • F41B9/0003—Liquid ejecting guns, e.g. water pistols, devices ejecting electrically charged liquid jets, devices ejecting liquid jets by explosive pressure characterised by the pressurisation of the liquid
    • F41B9/0031—Liquid ejecting guns, e.g. water pistols, devices ejecting electrically charged liquid jets, devices ejecting liquid jets by explosive pressure characterised by the pressurisation of the liquid the liquid being pressurised at the moment of ejection
    • F41B9/0043—Pressurisation by explosive pressure
    • F41B9/0046—Disruptors, i.e. for neutralising explosive devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B33/00—Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor
    • F42B33/06—Dismantling fuzes, cartridges, projectiles, missiles, rockets or bombs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B33/00—Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor
    • F42B33/06—Dismantling fuzes, cartridges, projectiles, missiles, rockets or bombs
    • F42B33/062—Dismantling fuzes, cartridges, projectiles, missiles, rockets or bombs by high-pressure water jet means

Definitions

  • This invention relates to an interrupter, also known as a disruptor.
  • Interrupters are devices employed to disrupt explosives, particularly terrorists' explosives.
  • Interrupters are distinct from dearmers, at least in the context of this patent specification. Both dearmers and interrupters function by driving a projectile into munitions, disrupting the detonation process so that the explosives in the munitions are not detonated before the detonation apparatus is destroyed by the action of the projectile.
  • the explosives are almost invariably encased in metal such as steel so that the dearmer itself needs to be powered by explosive or propellant means with sufficient force in order to penetrate the casing.
  • the personnel wishing to disarm the munitions often know its design. This means that solid projectiles, directed specifically at the detonation apparatus or fuse of the munitions are often beneficial.
  • a current design employs a steel tube, closed at a breech end that houses a propellant cartridge.
  • a water projectile is disposed in front of the cartridge.
  • the interrupter is often deployed on a robotic vehicle because, with terrorist bombs, there is often a danger of remote or timed detonation that may pose a significant risk to personnel.
  • Robotic vehicles are often small and nimble, enabling them to be deployed in many different locations where terrorist bombs may be left. However, they need to carry other equipment such as cameras so that they can be remotely steered and aimed. Consequently, disruptors generally represent a significant load for the robotic vehicle and reduction of this load is highly desirable.
  • GB-A-2083894 discloses a dearmer having a steel barrel, and metal or water projectile, and the arrangement is typical of that genre of apparatus, whereas GB-A-2030684 discloses a disrupter having a similar construction but wherein the projectile, being either water or a cylindrical body, is driven by expanding gases of a propellant.
  • US-A-4779511 discloses a disposable dearmer which has a relatively light body, and is only so strong as to "contain the explosive long enough to expel the slug with the proper velocity". It is suggested that glass-fibre reinforced plastics may be suitable, but accepts that the body may be damaged or destroyed on detonation.
  • WO-A-03/058155 discloses an explosive disrupter which is characterised in being light, indeed, made of plastics material.
  • the plastics housing contains a precise and predetermined explosive charge and a projectile.
  • the plastics casing disintegrates on detonation and the projectile, as well as the explosive charge can be selected and sized to suit the target.
  • the complete disintegration of the housing and the explosive charge poses a significant risk of damaging a robotic vehicle, and surrounding infrastructure.
  • a disrupter comprising a barrel a breech mechanism at a breech end of the barrel to receive a cartridge of deflagrating propellant; a charge of liquid, O seals in the barrel to prevent the liquid charge leaking from the muzzle end of the barrel and from contacting the cartridge; wherein the barrel is cast in a mould from plastics material whereby, when the cartridge is initiated to drive the charge from the barrel, the material of the barrel is distorted plastically but is not fractured.
  • the barrel wall at least in the vicinity of the cartridge, must be thick enough so that the plastics material can withstand the strains imposed by initiation and subsequent expansion of the propellant gasses.
  • the surprising element is how thin the wall can be and yet be strong enough to withstand such strains, at least on one occasion, in any event.
  • the absolute thickness depends on the nature of the plastics material, as well as the strains imposed by the cartridge.
  • Polyurethane is a suitable material.
  • a barrel approximately 400 mm long, inner diameter 27 mm and wall thickness 8 mm has a mass of around 450 g, and can withstand a propulsive pressure generated at the breech end of in excess of 500 bar applied for several milliseconds. This is sufficient to propel a mass of water of 100-150 g with sufficient velocity to form an effective disruptor jet.
  • the barrel may undergo significant plastic deformation but does not fail. It is important that the barrel does not fail, both to retain the propulsive pressure in order to produce a jet of sufficient velocity, and to eliminate fragment hazards which may cause significant collateral damage.
  • unreinforced plastics material can surprisingly be employed.
  • the plastics material may be unreinforced by any thing that is not poured with the plastics material into the mould.
  • the mould may include a thread for connection of a breech cap.
  • FIG. 1 is a schematic illustration of a disruptor in accordance with the invention.
  • a disruptor 10 has a tubular barrel 12 of cast polyurethane.
  • the barrel is approximately 400 mm long, has and inner diameter of 27 mm and a wall thickness 8 mm. It is screw threaded at a breech end 14 to receive a breech 16.
  • An electrically fired deflagration cartridge 18 is disposed inside the breech end 14 of the barrel, within the confines of the breech 16.
  • the cartridge may be such as employed by a disruptor currently marketed under the brand Pigstick by A B Precision (Poole) Limited (see website at http://www.abprecision.co.uk/pdf/pigstick.pdf for further detail).
  • the cartridge employs a deflagrating propellant that does not explosively detonate but which bums rapidly on initiation producing rapidly expanding gases.
  • An air-filled space 20 is provided between the cartridge 18 and a piston 22, which space is pressurised by the expanding gases of the deflagrating propellant on initiation thereof to a pressure in excess of 500 bar.
  • a charge of water retained by an end cap 28 which is a sealing, but otherwise loose fit, in the discharge end 26 of the barrel 12.
  • the barrel is not reinforced, since, although this might well strengthen the barrel, it also reduces its ductility, rendering it brittle. It is the ductility that on the one hand contains the rapid increase in pressure, while on the other, the dynamic strength of the material appears much greater at the strain rates imposed by the cartridge propellant deflagration than its published static strength suggests.
  • the barrel 12 is cast from molten polyurethane or similar plastics material in an open mould (not shown).
  • the mould has an internal thread to form a corresponding thread on the barrel.
  • the barrel is therefore unscrewed from the mould once the plastics material has cooled and solidified.
  • the breech 16 may also be made from polyurethane or other suitable plastic. In the current use an injection moulded polyethylene breech is used such that it does not require machining of its thread 30 on its internal bore or wire apertures 32 for the firing wires (not shown). The breech may or may not be reused a number of times.
  • the arrangement is light and can be carried by a small robotic vehicle. Furthermore, since it does not fragment on firing, there is no danger of collateral damage to the vehicle.
  • the current design has a total mass of less than 65Og compared with re-usable steel barrels and breeches which typically weigh in excess of 2.5kg for a similar performance.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Abstract

Selon la présente invention, un désintégrateur (10) comporte un canon en plastique (12) coulé à partir de polyuréthane non renforcé de sorte que seule la déformation plastique du canon se produit lors de l'allumage d'une cartouche (18) qui décharge une charge d'eau (24).
PCT/GB2007/001812 2006-05-16 2007-05-15 Interrupteur de détonation Ceased WO2007132246A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US12/301,162 US20090178548A1 (en) 2006-05-16 2007-05-15 Detonation interrupter
EP07732835A EP2021726A1 (fr) 2006-05-16 2007-05-15 Interrupteur de detonation
CA002652589A CA2652589A1 (fr) 2006-05-16 2007-05-15 Interrupteur de detonation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0609670A GB2438212A (en) 2006-05-16 2006-05-16 Detonation interrupter
GB0609670.5 2006-05-16

Publications (1)

Publication Number Publication Date
WO2007132246A1 true WO2007132246A1 (fr) 2007-11-22

Family

ID=36660235

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2007/001812 Ceased WO2007132246A1 (fr) 2006-05-16 2007-05-15 Interrupteur de détonation

Country Status (5)

Country Link
US (1) US20090178548A1 (fr)
EP (1) EP2021726A1 (fr)
CA (1) CA2652589A1 (fr)
GB (1) GB2438212A (fr)
WO (1) WO2007132246A1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8276495B1 (en) * 2010-08-11 2012-10-02 The United States Of America As Represented By The Secretary Of The Army Modular explosive ordnance disposal system
US8915004B1 (en) * 2011-10-24 2014-12-23 F. Richard Langner Systems and methods for a firing pin
US9322625B1 (en) 2011-10-24 2016-04-26 F. Richard Langner Systems and methods for launching water from a disrupter cannon
US9200881B1 (en) 2011-10-24 2015-12-01 F. Richard Langner Systems and methods for an improved firing assembly
US10215543B1 (en) * 2012-05-10 2019-02-26 Mark Benson Linear explosive disruptor
US8833223B1 (en) 2012-06-19 2014-09-16 The United States Of America As Represented By The Secretary Of The Army Multi-petal projectile adapter for a dearmer
USD749183S1 (en) * 2014-06-23 2016-02-09 The United States Of America As Represented By The Secretary Of The Army Breech plug for disrupter unit
US9587909B1 (en) * 2016-05-06 2017-03-07 The United States Of America As Represented By The Secretary Of The Navy Modular disrupter cannon
US10126106B1 (en) * 2016-10-01 2018-11-13 F. Richard Langner Methods and apparatus for releasably coupling shock tube to a disrupter
US10712140B2 (en) * 2017-03-09 2020-07-14 Zero Point, Incorporated Bumper system for an explosive ordnance disposal disruptor
US11187487B1 (en) * 2017-08-18 2021-11-30 The United States Of America As Represented By The Secretary Of The Navy Disrupter driven highly efficient energy transfer fluid jets
US10495433B1 (en) * 2018-02-03 2019-12-03 F. Richard Langner Methods and apparatus for disarming an explosive device
US10054388B1 (en) * 2018-03-24 2018-08-21 F. Richard Langner Methods and apparatus for disarming an explosive device
US10955212B2 (en) * 2018-04-16 2021-03-23 Eagle Technology, Llc Lightweight recoil management
US10677460B2 (en) 2018-09-06 2020-06-09 Southwest Research Institute Thermite bag for chemical / biological agent munition and hazardous waste disposal system
US11815344B2 (en) * 2020-05-01 2023-11-14 Zero Point, Incorporated Modular disruption systems for explosive ordnance disposal
IL274417B2 (en) * 2020-05-03 2024-11-01 The State Of Israel Israel Nat Police Disrupter and ammunition for neutralizing improvised explosive devices

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2083894A (en) 1980-09-18 1982-03-31 Ester Gerd Gun for neutralising explosives and the like
US4779511A (en) * 1985-07-09 1988-10-25 The United States Of America As Represented By The Secretary Of The Navy Disposal dearmer for EOD applications
US4779544A (en) 1987-11-30 1988-10-25 Enerpel, Inc. Solid fuel combustion assembly
GB2291958A (en) * 1992-04-15 1996-02-07 Royal Ordnance Plc Disrupter weapon
FR2800867A1 (fr) * 1999-11-09 2001-05-11 Manurhin Defense Cartouche permettant la projection d'un liquide, procede et outillage de montage d'une telle cartouche
WO2003058155A1 (fr) 2002-01-08 2003-07-17 Alford Sidney C Dispositif disruptif pour engins explosifs

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4169403A (en) * 1978-08-04 1979-10-02 Hanson Ralph W Bomb circuit disrupting device and method
EP0178039A3 (fr) * 1984-06-15 1986-04-30 Technical Research Products Limited Dispositif pour rendre inoffensives des charges explosives
US5134921A (en) * 1990-06-24 1992-08-04 Custom Engineering And Designs, Inc. Water cannon for neutralizing explosive devices, and replaceable cartridge therefor
CA2332017C (fr) * 1998-06-10 2007-09-25 Proparms Ltd. Desactivateur a liquide dote d'un recul reduit
US6490957B1 (en) * 1999-11-19 2002-12-10 Battelle Memorial Institute Explosives disrupter
DE102006032300A1 (de) * 2006-07-11 2008-01-17 Peter Weiss Vorrichtung zum Entschärfen von improvisierten Spreng- und Brandvorrichtungen (IED)

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2083894A (en) 1980-09-18 1982-03-31 Ester Gerd Gun for neutralising explosives and the like
US4779511A (en) * 1985-07-09 1988-10-25 The United States Of America As Represented By The Secretary Of The Navy Disposal dearmer for EOD applications
US4779544A (en) 1987-11-30 1988-10-25 Enerpel, Inc. Solid fuel combustion assembly
GB2291958A (en) * 1992-04-15 1996-02-07 Royal Ordnance Plc Disrupter weapon
FR2800867A1 (fr) * 1999-11-09 2001-05-11 Manurhin Defense Cartouche permettant la projection d'un liquide, procede et outillage de montage d'une telle cartouche
WO2003058155A1 (fr) 2002-01-08 2003-07-17 Alford Sidney C Dispositif disruptif pour engins explosifs

Also Published As

Publication number Publication date
CA2652589A1 (fr) 2007-11-22
EP2021726A1 (fr) 2009-02-11
GB0609670D0 (en) 2006-06-28
GB2438212A (en) 2007-11-21
US20090178548A1 (en) 2009-07-16

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