EP3359907B1 - Nichtpyrotechnische sprengkapsel - Google Patents

Nichtpyrotechnische sprengkapsel Download PDF

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Publication number
EP3359907B1
EP3359907B1 EP16777673.1A EP16777673A EP3359907B1 EP 3359907 B1 EP3359907 B1 EP 3359907B1 EP 16777673 A EP16777673 A EP 16777673A EP 3359907 B1 EP3359907 B1 EP 3359907B1
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EP
European Patent Office
Prior art keywords
disc
open tube
piece
inlet pipe
steel wool
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
EP16777673.1A
Other languages
English (en)
French (fr)
Other versions
EP3359907A1 (de
Inventor
Laurence LEMARIÉ
Philippe Leclercq
Jean-Pierre FAUCHER
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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Publication of EP3359907A1 publication Critical patent/EP3359907A1/de
Application granted granted Critical
Publication of EP3359907B1 publication Critical patent/EP3359907B1/de
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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
    • F42B3/12—Bridge initiators
    • F42B3/128—Bridge initiators characterised by the composition of the pyrotechnic material

Definitions

  • the invention relates to igniters, flame generators and other devices for igniting an oxidizer for the combustion of objects. It relates in particular to the field of the dismantling of installations containing pyrotechnic waste to be destroyed. In particular, one thinks of a multitude of explosives in several different forms and states. Unconfined buildings, cassettes, asphalt mixes, pulverulent materials, machining slurries, detonators and explosive-laden waste may be mentioned. Waste contaminated with explosives, objects and materials comes in the form of materials, materials, personal protective equipment, tools, machines, solvents, most of the time contaminated with explosives encountered on the site.
  • a pyrotechnic waste destruction technique currently in use, is to burn this waste in the open air.
  • the smooth running of this burning operation begins with an essential step of initiating a combustion, that is to say causing ignition.
  • pyrotechnic igniters These initiator devices are, by definition, made up of two indispensable elements, which are a resistance and a pyrotechnic mixture, itself composed of a fuel and an oxidant. To form these can be used titanium, zirconium and potassium nitrate and potassium perchlorate.
  • a drop of the pyrotechnic mixture is deposited on the resistor, which is generally made of a thin metal wire and twisted. As soon as an electric current of sufficient intensity, at about 0.6 amperes, flows through the resistor for a given time, about 0.3 ms, the pyrotechnic mixture burns. This allows the start of the combustion of the material and allows the ignition of the oxidizer soaking the material to be destroyed.
  • This type of device is close to certain detonators, however, it differs in the sense that it does not function to produce a shock wave.
  • the flame generated by such means during the ignition of the oxidant, has a duration of only a few seconds.
  • the operation is then delicate, when the weather conditions are unfavorable, for example in the presence of wind and / or rain.
  • the object of the invention is to avoid the disadvantages of the aforementioned devices, and the problems they pose and lower the cost of such devices.
  • the tube and the disc are made of cardboard.
  • a foam cylinder placed against the disc, outside thereof, is used for the purpose of maintaining the dual electrical cord and the compressed air supply pipe. This allows the sealing of the inside of the tube at the disc. The disc also protects the foam cylinder from thermal radiation.
  • a spacer placed in the open tube, between the piece of steel wool and the disc is advantageous to use.
  • the spacer allows to have reproducibility of manufacture of the igniter.
  • the double cord has two pods in which the ends of the sublimable wire are plugged, the pods being offset relative to each other not to be in contact with each other, once positioned in the piece of wool steel.
  • the igniter according to the invention comprises mainly an open tube 1, inside which is placed a piece of steel wool 9, occupying the entire inner section of the open tube 1. Inside this piece of wool 9 steel, is placed a sublimable wire 8. This sublimable 8 wire is powered in electricity by a double electrical cord 6, which arrives at the piece of steel wool 9 and is equipped with two lugs, not shown in this figure.
  • the sublimable wire 8 may be made of stainless steel, for example Z8 CN 25 20 .
  • the disk 3 is made of cardboard, as is the open tube 10.
  • the disk 3 and the foam cylinder 2 are crossed at their center by a compressed air inlet pipe 4 which activates the combustion of the steel wool 9. It is completed with a nozzle 5 which surrounds it, preferably silicone and placed at the disc 3. This makes it possible not to tear the compressed air inlet pipe 4 of the disc 3.
  • a power cord runs along or passes through the foam cylinder 2 and runs along or through the disk 3.
  • This double power cord 6 has its end positioned on the side of the piece of steel wool 9.
  • the wire 8 is crimped on means of two lugs 7 to this electrical cord 6.
  • the figure 2 lets see this mounted set. It distinguishes the inlet pipe 4, the electric cord 6, the open tube 1 and a radial surface of the piece of steel wool 9.
  • the figure 3 lets you see all these pieces in an exploded way. It has included a lug 7 connecting the electrical cord 6 to the wire 8.
  • the figure 4 shows the connection of the wire 8 to the electrical cord 6, by means of two lugs 7.
  • Each lug 7 is placed at the end of one of the two parts of the double electrical cord 6 and allows one end of the wire 8 to to be fixed. Note that the position of the two lugs 7 is shifted longitudinally, if we bring the two parts of the electrical cord 6. This is intended so that the two lugs 7 are not in contact with each other, once set to the inside of the piece of steel wool 9, the mounting does not necessarily ensure a precise and separate positioning of these two lugs 7. This avoids a risk of short circuit in the igniter.
  • the operating principle of the igniter is as follows. A current of sufficient intensity implodes the wire 8 sublimable. Thus, the piece of steel wool burns. The supply of compressed air through the inlet tube 4 makes it possible to maintain this combustion and the formation of an intense flame for a period of several minutes. Thus, the combustion of the materials inside the open tube 1 continues.
  • the igniter When using, simply connect the igniter to a power supply and a compressed air supply. The igniter is then placed in front of the waste to be destroyed. The opening of a service valve for supplying compressed air is then opened. The wire 8 is then energized. A voltage of 25 volts can be used at an intensity of between 10 and 20 amperes. The pressure of the compressed air to be sent inside the igniter can be of the order of 1 bar. Once these conditions are fulfilled, the firing can then take place.
  • the igniter according to the invention is easy to develop.
  • the mounting principle is as follows.
  • a first phase is to crimp the wire 8 on the two pods 7.
  • the second operation is the establishment of the electrical cord 6 in the piece of steel wool 9, which has been precut.
  • a third operation is to introduce this set into the open tube 1, which is preferably made of cardboard.
  • the following operation consists of placing the open tube 10, which serves as a spacer, inside the open tube 1.
  • the following operation is to prepare the inlet pipe 4 compressed air, equipped with a protective cap and mounted on the disc 3 and the foam disc 2.
  • the last phase is to introduce this set prepared during the previous operation into the end of the open tube 1.
  • the igniter according to the invention makes it possible to improve the temporal conditions of the burning of the waste.
  • the igniter according to the invention is reliable, allows a remote firing and the generation of a flame for several minutes and can withstand the weather during use.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)

Claims (7)

  1. Zerstörbarer Zünder, dadurch gekennzeichnet, dass er Folgendes umfasst:
    - ein offenes Rohr (1);
    - ein Stück (9) Stahlwolle, das in dem offenen Rohr (1) angeordnet ist;
    - einen Draht (8), der unter elektrischer Beanspruchung sublimiert werden kann und in dem Stück (9) Stahlwolle angeordnet ist;
    - eine elektrische Doppellitze (6), die mit dem Draht (8) verbunden ist, um ihn zu speisen, und die in dem offenen Rohr (1) verläuft;
    - eine Druckluft-Einlassröhre (4), die auf derselben Seite wie die elektrische Doppellitze (6) in das offene Rohr (1) mündet; und
    - eine Scheibe (3), die auf dem gesamten Querschnitt des offenen Rohrs (1) angeordnet ist und durch die die Druckluft-Einlassröhre (4) und die elektrische Doppellitze (6) verlaufen.
  2. Zünder nach Anspruch 1, dadurch gekennzeichnet, dass er einen an der Scheibe (3) angeordneten Schaumstoffzylinder (2) außerhalb der Scheibe umfasst, um die elektrische Doppellitze (6) und die Druckluft-Einlassröhre (4) zu halten und die Dichtigkeit des Innenraums des offenen Rohrs (1) in Bezug auf die Scheibe (3) zu verbessern.
  3. Zünder nach Anspruch 1, dadurch gekennzeichnet, dass er einen Abstandshalter (10) umfasst, der in dem offenen Rohr (1) zwischen dem Stück (9) Stahlwolle und der Scheibe (3) angeordnet ist.
  4. Zünder nach Anspruch 1, dadurch gekennzeichnet, dass die Speisungsdoppellitze (6) zwei Hülsen (7) besitzt, in die die Enden des Drahts (8) gesteckt sind, wobei die Hülsen (7) relativ zueinander versetzt sind, damit sie nicht miteinander in Kontakt sind, wenn sie in dem Stück (9) Stahlwolle angeordnet sind.
  5. Zünder nach Anspruch 1, dadurch gekennzeichnet, dass das offene Rohr (1) aus Karton ist.
  6. Zünder nach Anspruch 1, dadurch gekennzeichnet, dass die Scheibe (3) aus Karton ist.
  7. Zünder nach Anspruch 1, dadurch gekennzeichnet, dass er einen Silikonsockel (5) verwendet, der auf Höhe der Scheibe (3) um das Rohr der Druckluft-Einlassröhre (4) angeordnet ist, um die Einlassröhre (4) zu halten, ohne sie von der Scheibe (3) abzureißen.
EP16777673.1A 2015-10-06 2016-10-05 Nichtpyrotechnische sprengkapsel Active EP3359907B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1559500A FR3042032B1 (fr) 2015-10-06 2015-10-06 Inflammateur non pyrotechnique
PCT/EP2016/073719 WO2017060262A1 (fr) 2015-10-06 2016-10-05 Inflammateur non pyrotechnique

Publications (2)

Publication Number Publication Date
EP3359907A1 EP3359907A1 (de) 2018-08-15
EP3359907B1 true EP3359907B1 (de) 2019-11-06

Family

ID=55862847

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16777673.1A Active EP3359907B1 (de) 2015-10-06 2016-10-05 Nichtpyrotechnische sprengkapsel

Country Status (4)

Country Link
EP (1) EP3359907B1 (de)
ES (1) ES2770853T3 (de)
FR (1) FR3042032B1 (de)
WO (1) WO2017060262A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202019102278U1 (de) 2019-04-23 2019-04-30 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Anordnung zur Messung elektrischer und dielektrischer Eigenschaften eines Materials

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB345284A (en) * 1929-11-11 1931-03-11 David Hodge Improvements in or relating to heating compositions for blasting cartridges
BE407243A (de) * 1933-12-20
GB431950A (en) * 1934-04-07 1935-07-18 James Taylor Safety igniter for blasting explosive cartridges or borehole charges
US3971320A (en) 1974-04-05 1976-07-27 Ici United States Inc. Electric initiator
US4152988A (en) 1977-09-19 1979-05-08 The United States Of America As Represented By The Secretary Of The Navy Electric match with epoxy coated fluorocarbon containing pyrotechnic composition
US4380958A (en) 1980-12-17 1983-04-26 The United States Of America As Represented By The Secretary Of The Army Electrostatic safe electric match
WO2004011396A2 (en) 2002-07-29 2004-02-05 The Regents Of The University Of California Lead-free electric match compositions
JP2004209342A (ja) * 2002-12-27 2004-07-29 Takata Corp イニシエータ及びガス発生器
EP1662224B1 (de) 2004-11-30 2010-11-17 Weatherford/Lamb, Inc. Nicht-explosiver Zweikomponenteninitiator
JP5271857B2 (ja) * 2009-09-28 2013-08-21 日立造船株式会社 破壊用カートリッジおよび破壊装置、並びに、破壊方法
CN202793187U (zh) * 2011-08-24 2013-03-13 安徽理工大学 一种非起爆药雷管

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3359907A1 (de) 2018-08-15
FR3042032A1 (fr) 2017-04-07
WO2017060262A1 (fr) 2017-04-13
ES2770853T3 (es) 2020-07-03
FR3042032B1 (fr) 2017-12-15

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