EP0239779B1 - Anstichzündhütchen - Google Patents

Anstichzündhütchen Download PDF

Info

Publication number
EP0239779B1
EP0239779B1 EP87102519A EP87102519A EP0239779B1 EP 0239779 B1 EP0239779 B1 EP 0239779B1 EP 87102519 A EP87102519 A EP 87102519A EP 87102519 A EP87102519 A EP 87102519A EP 0239779 B1 EP0239779 B1 EP 0239779B1
Authority
EP
European Patent Office
Prior art keywords
charge
detonator
outer casing
ignition
primer
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.)
Expired - Lifetime
Application number
EP87102519A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0239779A2 (de
EP0239779A3 (en
Inventor
Gottfried Dr. Prasnik
Peter-Josef Grommes
Günter Kühlbach
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.)
Dynamit Nobel AG
Original Assignee
Dynamit Nobel AG
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 AG filed Critical Dynamit Nobel AG
Priority to AT87102519T priority Critical patent/ATE91016T1/de
Publication of EP0239779A2 publication Critical patent/EP0239779A2/de
Publication of EP0239779A3 publication Critical patent/EP0239779A3/de
Application granted granted Critical
Publication of EP0239779B1 publication Critical patent/EP0239779B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F42C19/0815—Intermediate ignition capsules, i.e. self-contained primary pyrotechnic module transmitting the initial firing signal to the secondary explosive, e.g. using electric, radio frequency, optical or percussion signals to the secondary explosive
    • 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
    • F42B3/16—Pyrotechnic delay initiators
    • 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
    • F42C19/10—Percussion caps

Definitions

  • the present invention relates to a detonator with a mechanically triggerable ignition element in accordance with the preamble of claim 1.
  • the ignition element is designed as an ignition cap, in which the shock-sensitive primer is located in a one-piece cup; after ignition of the ignition charge, the ignition gases or the flame penetrate through one or more ignition channels to a delay charge and cause it to ignite, which in turn brings a downstream ignition agent to conversion after the reaction.
  • a disadvantage of detonators with these ignition elements is the fact that the ignition charge is generally ignited by means of a spring-loaded ignition needle, which is very sensitive to shock, but is often torn out of the detonator again by the action of the spring force before the delay time of the delay charge has expired becomes. This process relieves pressure and can lead to the extinguishing of the combustion process in the delay block, so that ignition failures occur.
  • These effects are particularly noticeable when hitting a small obstacle, e.g. Bushes or branches are observed, while they are exposed to a strong impact of the detonator, e.g. on hard ground, hardly occur.
  • EP-A-0 122 012 also discloses a detonator, in particular for initiating explosive charges in oil wells, in which an inner sleeve with a bottom is arranged in the outer sleeve having a bottom.
  • the wall of the inner sleeve lies against that of the outer sleeve, the bottoms of both sleeves being at a distance from one another.
  • the inner sleeve serves as a charge container to hold the larger part of the detonator's charge, namely an initial and a secondary explosive charge, while the smaller one Part, namely another initial explosive and a friction charge, in the space between the two floors.
  • the detonator can be triggered mechanically by a firing pin, the bottom of the outer sleeve not being perforated or torn open by the firing pin striking it.
  • the bottom of the inner sleeve also serves as an anvil for the compression of the initial explosive and friction charge.
  • the friction charge such as silicon carbide, powdered metals, aluminum oxide and sand, is provided so that the detonator can be safely triggered with the firing pin even if the bottom of the outer sleeve must not be destroyed. The latter is necessary so that the detonator can be safely removed from the borehole in the event of a false trigger. A delay rate is not provided here.
  • the outer sleeve surrounding the tapping primer is relatively thick-walled and has a thin bottom, the wall thickness of which can be between 0.05 and 0.15 mm.
  • the side walls can increase in strength towards the bottom; this increase takes place in such a way that the outer diameter of the sleeve remains constant, while the inner diameter becomes increasingly smaller towards the bottom, so that the radius of the thin bottom becomes correspondingly smaller.
  • the wall thickness at the bottom of the sleeve can be as large as the radius of the thin bottom.
  • the inner sleeve has an outer diameter that corresponds to the inner diameter of the outer sleeve. Its wall is positively attached to the inner wall of the outer sleeve. It is arranged coaxially within the outer sleeve so that its bottom forms a cavity with the bottom of the outer sleeve and its wall, in which the primer is arranged.
  • the walls of the inner sleeve are thinner than the walls of the outer sleeve.
  • the thickness of the bottom corresponds approximately to the thickness of the bottom of the outer sleeve.
  • the wall thickness of the side walls is slightly larger than that of the floor.
  • the open side opposite the bottom can be bent inwards, so that this sleeve side, which is also referred to below as the sleeve mouth, has the shape of a disk with a circular opening.
  • the side of the inner sleeve bent in this way preferably lies in a form-fitting manner directly on the correspondingly bent side of the outer sleeve.
  • the diameter of the sleeve mouth corresponds to the inner sleeve.
  • the inner diameter of both sleeves is preferably smaller than the height of the corresponding sleeve.
  • the mouth of the inner sleeve preferably adjoins that of the outer sleeve.
  • Metals, metal alloys or plastics can be used as the material for the inner and outer sleeve.
  • Preferred materials are aluminum or brass.
  • the cavity surrounded by the wall of the outer sleeve and the bottoms of the inner and outer sleeves contains a known primer consisting of oxidizing and reducing agents as well as quick-acting initial explosives.
  • the proportion of initial explosives in this primer is generally between 40 and 60% by weight, depending on the desired trigger sensitivity.
  • the entire set can be used both in loose form and bound by known binders for fixing the components.
  • initial explosives examples include lead azide, diazodinitrophenol, lead trinitroresorcinate, tetrazene or azotetrazole in the form of its heavy metal salts.
  • the entire tapping primer is arranged in the detonator so that the sleeve mouth points in the direction of the delay set. It is arranged coaxially with the latter within the detonator sleeve.
  • Figure 1 shows a detonator according to the prior art
  • Figure 2 shows the detonator according to the invention with tapping primer
  • Figure 3 shows the tapping primer in an enlarged view, each in longitudinal section.
  • the detonator sleeve is denoted by 2, in which the tapping primer - arranged in FIG. 1 as primer 6 '-, the delay set 5, the initial set 4 and the secondary charge 3 are arranged one behind the other.
  • the secondary charge 3 is preferably covered with a cover plate 1 .
  • the outer sleeve is 7 and the inner sleeve 8.
  • the ignition charge 9 is located between the outer and inner sleeve.
  • the cavity in which this ignition charge 9 is arranged is enclosed by the bottom 10 of the outer sleeve 7 and the bottom 11 of the inner sleeve 8 and the wall of the outer sleeve 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Graft Or Block Polymers (AREA)
EP87102519A 1986-03-06 1987-02-23 Anstichzündhütchen Expired - Lifetime EP0239779B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87102519T ATE91016T1 (de) 1986-03-06 1987-02-23 Anstichzuendhuetchen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863607350 DE3607350A1 (de) 1986-03-06 1986-03-06 Detonator mit schnell ausloesendem anzuendelement
DE3607350 1986-03-06

Publications (3)

Publication Number Publication Date
EP0239779A2 EP0239779A2 (de) 1987-10-07
EP0239779A3 EP0239779A3 (en) 1989-05-24
EP0239779B1 true EP0239779B1 (de) 1993-06-23

Family

ID=6295643

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87102519A Expired - Lifetime EP0239779B1 (de) 1986-03-06 1987-02-23 Anstichzündhütchen

Country Status (7)

Country Link
US (1) US4771693A (enrdf_load_stackoverflow)
EP (1) EP0239779B1 (enrdf_load_stackoverflow)
AT (1) ATE91016T1 (enrdf_load_stackoverflow)
DE (2) DE3607350A1 (enrdf_load_stackoverflow)
ES (1) ES2041248T3 (enrdf_load_stackoverflow)
IL (1) IL81787A (enrdf_load_stackoverflow)
IN (1) IN169176B (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10989509B2 (en) * 2017-10-05 2021-04-27 Combined Systems, Inc. Primer adapter assembly

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE310629C (enrdf_load_stackoverflow) *
GB188606909A (en) * 1886-05-22 1887-02-15 Improvements in percussion caps and in the means for securing the same in cartridges
US3195463A (en) * 1962-07-19 1965-07-20 Remington Arms Co Inc Die cast battery cup and anvil
BE831139A (fr) * 1975-07-08 1975-11-03 Chambre d'amorce pour cartouche
FR2355272A1 (fr) * 1976-06-03 1978-01-13 Manuf Gle Munitions Dispositif d'amorcage pour munitions et analogues
US4315462A (en) * 1979-09-10 1982-02-16 Vollers Gary L Shot gun shell primer
US4459914A (en) * 1982-05-17 1984-07-17 Caruso Anthony M Impact-detonated time delay fuse
US4527481A (en) * 1983-04-08 1985-07-09 Ici Americas Inc. Impact sensitive high temperature detonator
DE3446751A1 (de) * 1984-12-21 1986-07-03 Diehl GmbH & Co, 8500 Nürnberg Anzuendmittel oder zuendmittel

Also Published As

Publication number Publication date
DE3607350C2 (enrdf_load_stackoverflow) 1991-10-17
ATE91016T1 (de) 1993-07-15
ES2041248T3 (es) 1993-11-16
IL81787A (en) 1993-05-13
EP0239779A2 (de) 1987-10-07
IL81787A0 (en) 1987-10-20
DE3607350A1 (de) 1987-09-24
IN169176B (enrdf_load_stackoverflow) 1991-09-14
EP0239779A3 (en) 1989-05-24
DE3786284D1 (de) 1993-07-29
US4771693A (en) 1988-09-20

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