WO1996004523A1 - Detonateur electrique - Google Patents

Detonateur electrique Download PDF

Info

Publication number
WO1996004523A1
WO1996004523A1 PCT/EP1995/003085 EP9503085W WO9604523A1 WO 1996004523 A1 WO1996004523 A1 WO 1996004523A1 EP 9503085 W EP9503085 W EP 9503085W WO 9604523 A1 WO9604523 A1 WO 9604523A1
Authority
WO
WIPO (PCT)
Prior art keywords
ignition
delay
delay circuit
ignition element
primary
Prior art date
Application number
PCT/EP1995/003085
Other languages
German (de)
English (en)
Inventor
Friedrich Heinemeyer
Helmut ZÖLLNER
Original Assignee
Dynamit Nobel Aktiengesellschaft
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 Dynamit Nobel Aktiengesellschaft filed Critical Dynamit Nobel Aktiengesellschaft
Priority to AU32562/95A priority Critical patent/AU3256295A/en
Publication of WO1996004523A1 publication Critical patent/WO1996004523A1/fr

Links

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
    • F42B3/121—Initiators with incorporated integrated circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C11/00—Electric fuzes
    • F42C11/06—Electric fuzes with time delay by electric circuitry
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/40—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected electrically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/06—Electric contact parts specially adapted for use with electric fuzes

Definitions

  • the invention relates to an electric detonator according to the preamble of claim 1.
  • the igniter element (preferably igniter pill) is supplied with the electrical energy via the igniter wires.
  • the ignition mixture is ignited by ohmic (resistance-dependent) heating of the bridge wire.
  • the chemical conversion of the ignition mixture causes the pyrotechnic delay unit located in the delay body to be ignited.
  • a primary charge is ignited.
  • This primary charge can consist of an initial explosive (preferably lead azide) or a DDT-capable charge.
  • the detonative effect of the primary charge initiates the undercharging, which in turn initiates the implementation of the explosive surrounding the detonator.
  • the delay times in conventional pyrotechnic delay systems can include can be adjusted by the sentence compilation, the sentence density and the length of the sentence column.
  • the necessary number of detonators in parallel, series or parallel-series connection is connected to a simple capacitor igniter to dismantle the explosion.
  • the design and calculation of an ignition circuit constructed in this way is based on elementary rules of electrical engineering (Ohm's law, ignition pulse).
  • the circuit can be checked with simple measuring devices.
  • the electrical sensitivity of the detonators is determined by the igniter used and can be adapted to the prevailing boundary conditions.
  • a generic detonator with digital delay is known from DE-A1- 2 18 881.
  • This detonator consists of a tubular housing which surrounds a delay detonator and which is closed at one end and connected to a shock wave tube (explosive hose) at the other end.
  • the energy output of the explosive hose actuates an initial ignition charge, the energy output of which is directed to a piezoceramic transducer in order to generate an electrical energy output.
  • This electrical energy output is applied to a delay circuit, which serves to control an ignition signal which is applied to an ignition element after a predetermined time delay has elapsed.
  • the conventional pyrotechnic detonators used to date show a statistical scatter in their delay times, which limits the spacing and number of time stages.
  • pyrotechnic kits tend to change their burning behavior, so that the simultaneous use of new and longer stored detonators can lead to problems.
  • the production of high quality delay detonators is associated with great effort and the quality is fundamentally limited by the physical properties of the delay set systems used.
  • Electronic programmable ignition systems avoid the disadvantages mentioned above with regard to the delay time and deliver delay times with an accuracy better than 1 millisecond.
  • a disadvantage of such electronic ignition systems is that the ignition circuits (wiring), igniter and ignition devices (ignition machine) specially developed for this must be matched to one another. For example, it is not possible to trigger electronic detonators with a common, commercially available capacitor detonator.
  • Electronic detonators with an initiation by an explosive hose have the disadvantage that, in contrast to conventional electrical ignition, they cannot be used for certain blasting work (e.g. salt mining) and it is no longer possible to check the ignition circuit shortly before the ignition.
  • the invention has for its object to improve an electric detonator according to the preamble of claim 1 such that it has improved time accuracy compared to the conventional electric detonator with pyrotechnic time delay and allows the further use of the conventional igniter and ignition technology for electrical detonators.
  • fuse wires lead into a primary ignition element in the housing, which activates or starts an energy source in a delay ignition element during ignition, whereby the delay switching starts.
  • the detonator according to the invention can be ignited using commercially available ignition machines. It can also be used together with conventional electrical detonators.
  • the delay time is set in the factory in the electronic delay circuit. They are triggered by the primary ignition element, which activates or starts an energy source in the delay ignition element, as a result of which the delay circuit starts.
  • the primary igniter element is advantageously an igniter pill or a bridge igniter pill.
  • gap detonators, bridge detonators, layer elements, etc. are also useful. It is important that with the ignition of the primary ignition element, an energy source in the delay ignition element is activated or started, whereby the delay circuit is started.
  • an active battery and a switch which sets the delay circuit in motion are arranged in the delay ignition element, the switch being actuated by the ignition of the primary ignition element.
  • a commercially available button cell of the lithium-manganese dioxide type can be used as the switch mechanical or optoelectronic switches, thermal switches or ion current switches are preferably used.
  • Mechanical switches which are actuated by the pressure generated by the primary ignition element are preferably piston switches or membrane switches.
  • Optoelectronic switches are actuated by the light generated by the primary ignition element.
  • thermal switches are actuated by the heat generated by the primary igniter element, e.g.
  • the ion current switch uses the ionizing property of the reaction flame of the ignition element or the igniter. If an ionizing gas is present, the ion current switch makes contact between two poles.
  • a serial combination of the aforementioned principles is preferably used.
  • a battery or thermal battery that can be activated by the ignition of the primary ignition element is arranged in the delay ignition element and, after activation, starts the delay circuit.
  • Activatable batteries and thermal batteries have the advantage of long shelf life. In addition, no additional switch is required.
  • a piezoelectric transducer in particular with an explosive connected upstream, which is acted on by the ignition of the primary ignition element, is arranged in the delay ignition element, the piezoelectric transducer providing the energy for the delaying circuit after activation
  • a capacitor in the delay ignition element, which is charged, for example, by the piezoelectric transducer or the battery.
  • the delay ignition element consists of a delay circuit - timer or timer - with an output stage and an energy source that can be activated or started.
  • the secondary ignition element is connected to it.
  • the delay circuit is e.g. an analog RC combination, the time delay being given by the time constant R C, or a digital counter and an externally switchable oscillator.
  • the time delay is defined by the external elements R and C.
  • the oscillator is a standard component. Adjustable digital counters with an integrated oscillator are also useful.
  • the time delay is determined by the external setting of a counter by e.g. Bond realized. This module is commercially available and is e.g. used in the watch industry.
  • the output stage serves as an electrical switch between the power supply and the secondary ignition element. It is controlled by the pulse of the timer.
  • the output stage can be implemented using a transistor or thyristor or Darlington circuit.
  • the secondary igniter is used to initiate the ignition charge, preferably via a lead azide primary charge, but also free of primary materials, e.g. as a DDT charge.
  • the secondary igniter is e.g. a 20 ohm squib (adapted to the battery power), a detonator or a metal layer element.
  • Fig. 1 in longitudinal section an inventive detonator
  • FIG. 2 schematically shows block diagrams of three embodiments of the detonator according to the invention.
  • the detonator 1 according to the invention shown in FIG. 1 has an elongated housing 2 in the form of a cylindrical tubular sleeve which is made of metal, for example copper.
  • the sleeve is closed at the front end 15 and has an opening 16 at its rear end, through which two fuse wires 8 lead into the inside of the sleeve from the outside.
  • the igniter wires 8 are enclosed over part of their length by a plug 17 made of plastic, which is fixed at the rear end of the sleeve by indentations 18 of the sleeve material.
  • the fuse wires 8 are each provided with an insulating jacket and only their front ends are stripped.
  • the ends of the igniter wires 8 protruding from the inside of the plug 17 are electrically and mechanically connected to the two poles of an ignition pill 9.
  • the igniter 9 is guided in a cylindrical sleeve 19 made of plastic to protect against electrostatic ignition.
  • a electronic delay element electronic cjelay element - EDE
  • This delay ignition element 20 contains a delay circuit 7 with an output stage for a secondary ignition element 5 (ignition pill), which is arranged behind the delay ignition element 20 and projects freely into a cavity 21 of the sleeve.
  • the delay ignition element 20 also has an active or activatable battery and a switch or a piezoelectric transducer. This is described in more detail with reference to FIG. 2.
  • a primary charge 3 and a secondary charge 4 are arranged in the front end of the housing 2 or in the sleeve head.
  • the primary charge 3 is accommodated in a metal body 22 - a so-called NME body (non-mass explosion hazard) - for protection against impact loads.
  • a DDT charge can also be used instead of the primary charge.
  • FIG. 2 shows three embodiments of FIGS. 2a, 2b and 2c of the delay ignition element 20. All embodiments have in common that the detonator according to the invention can be connected to a conventional ignition machine 23.
  • Detonator wires 8 lead from this igniter 23 to the detonator and are connected to an igniter 9 there.
  • the igniter 9 is ignited by the ignition machine 23
  • the delay ignition element 20 is started.
  • the secondary ignition element 5 is ignited, whereupon the charges 3, 4 detonate.
  • FIG. 2a shows an embodiment in which a battery 12, which can be activated by the ignition of the igniter 9, is arranged as an energy source in the delay ignition element 20 in front of the delay circuit 7.
  • This battery 12 supplies the current for the delay circuit 7 and the output stage.
  • the battery 12 is activated by the ignition of the igniter 9.
  • a switch 11 and an active battery 10 are arranged in the delay ignition element 20 in front of the delay circuit 7.
  • the switch 11 is actuated by the ignition of the igniter 9 and starts the delay circuit 7.
  • a piezoelectric transducer 13 with an explosive 14 connected upstream is arranged in the delay ignition element 20 in front of the delay circuit 7. After ignition of the igniter 9, the explosive 14, which acts on the piezoelectric transducer 13, explodes. This generates the necessary current for the delay circuit 7, the output stage and the ignition of the igniter 9.
  • a capacitor is integrated in the delay ignition element 20 or in the delay circuit 7 for temporary storage.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Air Bags (AREA)

Abstract

L'invention concerne un détonateur (1) électrique qui comporte un boîtier (2), une charge explosive (3, 4) placée dans ledit boîtier (2), un élément de mise à feu (5) secondaire pour amorcer la charge explosive (3, 4), ainsi qu'un circuit de temporisation (7) électronique à étage de sortie, qui provoque un retardement fixe déterminé de la mise à feu de l'élément de mise à feu (5) secondaire, après arrivée d'une impulsion de départ. Afin d'améliorer la précision temporelle du détonateur (1) et qu'il soit simultanément possible de continuer à utiliser les appareils de mise à feu classique, il est prévu que, dans le boîtier (2), des fils de détonateur (8) entrent dans un élément de mise à feu primaire qui, lors de la mise à feu, active ou amorce une source d'énergie se trouvant dans l'élément de mise à feu temporisé (20), ce qui amorce le circuit de temporisation (7).
PCT/EP1995/003085 1994-08-02 1995-08-02 Detonateur electrique WO1996004523A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU32562/95A AU3256295A (en) 1994-08-02 1995-08-02 Electrical detonator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4427295A DE4427295A1 (de) 1994-08-02 1994-08-02 Elektrischer Sprengzünder
DEP4427295.2 1994-08-02

Publications (1)

Publication Number Publication Date
WO1996004523A1 true WO1996004523A1 (fr) 1996-02-15

Family

ID=6524703

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/003085 WO1996004523A1 (fr) 1994-08-02 1995-08-02 Detonateur electrique

Country Status (5)

Country Link
AU (1) AU3256295A (fr)
DE (1) DE4427295A1 (fr)
TR (1) TR199500932A2 (fr)
WO (1) WO1996004523A1 (fr)
ZA (1) ZA956448B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10400558B1 (en) 2018-03-23 2019-09-03 Dynaenergetics Gmbh & Co. Kg Fluid-disabled detonator and method of use

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102401615B (zh) * 2011-11-18 2013-06-26 西安物华巨能爆破器材有限责任公司 双索延期机构

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3570404A (en) * 1968-06-21 1971-03-16 Unidynamics Phoenix Electrical pyrotechnic programming system
US3589294A (en) * 1957-06-21 1971-06-29 Us Navy System for multiple point simultaneous initiation of explosive charges
FR2114099A5 (fr) * 1970-11-16 1972-06-30 France Etat
US3703145A (en) * 1969-12-05 1972-11-21 Us Navy Selective arming mode and detonation option ordnance fuze
US3930449A (en) * 1974-05-06 1976-01-06 The United States Of America As Represented By The Secretary Of The Army Time delay initiator
US4119038A (en) * 1977-05-13 1978-10-10 The United States Of America As Represented By The Secretary Of The Army Controlled activation of reserve power supplies
DE3436397A1 (de) * 1983-10-26 1985-05-15 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Verfahren und einrichtung zur ausloesung einer nachschussladung
WO1989001601A1 (fr) * 1987-08-14 1989-02-23 Bert Jonsson Systeme de mise a feu et son mode d'amorçage
US5317973A (en) * 1991-10-11 1994-06-07 Thomson-Brandt Armements Detonating device for a secondary explosive charge
US5335598A (en) * 1993-05-07 1994-08-09 Universal Propulsion Company, Inc. Timing and firing circuitry

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3589294A (en) * 1957-06-21 1971-06-29 Us Navy System for multiple point simultaneous initiation of explosive charges
US3570404A (en) * 1968-06-21 1971-03-16 Unidynamics Phoenix Electrical pyrotechnic programming system
US3703145A (en) * 1969-12-05 1972-11-21 Us Navy Selective arming mode and detonation option ordnance fuze
FR2114099A5 (fr) * 1970-11-16 1972-06-30 France Etat
US3930449A (en) * 1974-05-06 1976-01-06 The United States Of America As Represented By The Secretary Of The Army Time delay initiator
US4119038A (en) * 1977-05-13 1978-10-10 The United States Of America As Represented By The Secretary Of The Army Controlled activation of reserve power supplies
DE3436397A1 (de) * 1983-10-26 1985-05-15 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Verfahren und einrichtung zur ausloesung einer nachschussladung
WO1989001601A1 (fr) * 1987-08-14 1989-02-23 Bert Jonsson Systeme de mise a feu et son mode d'amorçage
US5317973A (en) * 1991-10-11 1994-06-07 Thomson-Brandt Armements Detonating device for a secondary explosive charge
US5335598A (en) * 1993-05-07 1994-08-09 Universal Propulsion Company, Inc. Timing and firing circuitry

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10400558B1 (en) 2018-03-23 2019-09-03 Dynaenergetics Gmbh & Co. Kg Fluid-disabled detonator and method of use
US11286757B2 (en) 2018-03-23 2022-03-29 DynaEnergetics Europe GmbH Fluid-disabled detonator and perforating gun assembly
US11959366B2 (en) 2018-03-23 2024-04-16 DynaEnergetics Europe GmbH Fluid-disabled detonator and perforating gun assembly

Also Published As

Publication number Publication date
TR199500932A2 (tr) 1996-06-21
AU3256295A (en) 1996-03-04
ZA956448B (en) 1996-03-22
DE4427295A1 (de) 1996-02-08

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