EP0349504B1 - Explosive Ladung - Google Patents

Explosive Ladung Download PDF

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Publication number
EP0349504B1
EP0349504B1 EP89850197A EP89850197A EP0349504B1 EP 0349504 B1 EP0349504 B1 EP 0349504B1 EP 89850197 A EP89850197 A EP 89850197A EP 89850197 A EP89850197 A EP 89850197A EP 0349504 B1 EP0349504 B1 EP 0349504B1
Authority
EP
European Patent Office
Prior art keywords
charge
jet
auxiliary
main
main charge
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
EP89850197A
Other languages
English (en)
French (fr)
Other versions
EP0349504A1 (de
Inventor
Stig Hallström
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.)
Saab Bofors AB
Original Assignee
Bofors AB
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 Bofors AB filed Critical Bofors AB
Priority to AT89850197T priority Critical patent/ATE80723T1/de
Publication of EP0349504A1 publication Critical patent/EP0349504A1/de
Application granted granted Critical
Publication of EP0349504B1 publication Critical patent/EP0349504B1/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
    • F42C19/09—Primers or detonators containing a hollow charge

Definitions

  • the present invention relates to an improvement in explosive devices, e.g. shells, mines, bombs or like devices, which include a fuse, a main charge and an auxiliary charge arranged between the fuse and the main charge and effective in detonating the main charge, which is encapsulated and separated from the auxiliary charge with the aid of mechanical obstacles.
  • explosive devices e.g. shells, mines, bombs or like devices
  • auxiliary charge arranged between the fuse and the main charge and effective in detonating the main charge, which is encapsulated and separated from the auxiliary charge with the aid of mechanical obstacles.
  • the main charge of an explosive device constructed in accordance with the above is usually placed in a strong casing.
  • the casing is utilized, inter alia, for reasons of safety, e.g. as protection during transport and storage. Its purpose is, inter alia, to protect against blows and knocks and other extraneous effects.
  • the casing is normally required to be impervious, such as to allow the explosive device to be stored for long periods under hard conditions.
  • an auxiliary charge in the detonation of such encased main charges, normally an auxiliary charge, a so-called BOOSTER, is used as a connecting link in the explosive chain between fuse and main charge.
  • this BOOSTER can assume large dimensions, e.g. 1-1.5 kg.
  • the size of the BOOSTER must be increased in order for it to perform its task of detonating the main charge.
  • the main object of the present invention is to provide an arrangement which will permit simple and reliable detonation of an encased main charge without utilizing arming safety means or other mechanical parts or weakened portions, while using a considerably smaller charge than has been required previously.
  • the invention is based on the knowledge that the above-mentioned object can be achieved with the aid of an auxiliary charge which has a directed explosive action of the type which on detonation achieves a mass jet of high energy and high velocity.
  • auxiliary charge which has a directed explosive action of the type which on detonation achieves a mass jet of high energy and high velocity.
  • Such charges known as “shaped charges” or “hollow charges”, are utilized today mainly for providing greater penetrative power, primarily against armour plating. It has also been proposed to utilize small charges of this kind in different fuse systems, but never for solving the specific problems encountered in conjunction with detonating encased main charges. Civil applications are also to be found.
  • AT-B-251 462 discloses an arrangement in explosive devices, including a fuse, a main charge and an auxiliary charge which is arranged between the fuse and the main charge and effective in detonating the main charge, the main charge being separated by mechanical obstruction from the auxiliary charge.
  • This prior art arrangement is used for the detonation of a main charge in the form of a bulk explosive material placed in a blast hole. The detonation is initiated by means of the main shock wave from the auxiliary charge which is in the form of a so called hollow charge and preferably placed in direct contact with the explosive material.
  • auxiliary charge comprises a charge which has a directed explosive action and of the type which on being detonated produces a mass jet of high-order energy and high velocity;
  • the auxiliary charge is oriented such that said jet penetrates into the main charge after penetrating intermediate mechanical obstruction; the auxiliary charge is spaced from said mechanical obstruction such that the jet is able to develop to the extent required before meeting said obstruction;
  • the auxiliary charge is fixed in the outer end of a tubular element, the inner end of which is closed off and attached to a protective casing encapsulating the main charge; the tubular element projects out through an opening in the protective casing enclosing the main charge; and the inner end of the tubular element is provided with a flange which is connected to the part of the inner surface of the protective casing surrounding the opening.
  • a sealing element is suitably arranged between the flange and the inner surface of the protective casing.
  • the distance between the auxiliary charge and the mechanical obstruction substantially corresponds to the largest diameter of the auxiliary charge cavity.
  • the jet path should be free from every element which can affect the development of the jet, and said path is preferably represented by an enclosed space filled with air but otherwise empty. This will ensure that the jet has time to develop, such as to obtain the required penetrative power.
  • the numeral 1 denotes the main charge itself, which can be moulded or pressed and comprises a commercially avaible explosive, such as HEXOTOL, OKTOL, HEXOTONAL and OKTONAL, plsatically bonded explosives, etc.
  • a commercially avaible explosive such as HEXOTOL, OKTOL, HEXOTONAL and OKTONAL, plsatically bonded explosives, etc.
  • the main charge 1 is enclosed in a strong protective casing 2, which protects the charge against external forces. Further mechanical obstruction may be present between the casing and the charge.
  • the numeral 3 denotes a conventional fuse which is disposed for detonating an auxiliary charge 4 having directed explosive action and having the form of a hollow or shaped charge.
  • the hollow or shaped charge 4 includes an explosive 5 which can be detonated by the fuse 3, the explosive being provided with a cavity 6 widening in a direction towards the main charge 1, this cavity being lined with a metal lining 7, suitably a copper lining.
  • the sleeve-shaped hollow charge is fixed in the outer end of a tubular connector 8, which extends through an opening in the protective casing 2.
  • the inward end 11 of the tubular connector 8 is closed off and provided with a flange 9, which is connected to the protective casing on the surfaces surrounding the opening, e.g. with the aid of screws 10.
  • a sealing element (not shown) is preferably applied between the flange 9 and the interior surface of the casing 2.
  • the main charge can be kept encapsulated in a protective casing without weakened portions or moveable parts which are to be moved relative each other.
  • the closed end 11 presents a mechanical obstacle which is penetrated by the mass jet from the shaped or hollow charge when the charge is detonated, the jet then penetrating deeply into the main charge and therewith effects satisfactory detonation of the charge.
  • the shaped or hollow charge is arranged with given spacing from the closed end 11, this spacing being sufficiently great to enable the jet to develop to the required extent, before it reaches the mechanical obstruction represented by the end 11. It has been found that this spacing should be of the same order of magnitude as the calibre of the shaped or hollow charge, i.e. a distance substantially corresponding to the largest diameter of the cavity 6.
  • the jet will take the form of a short pulse consisting of metal from the insert 7.
  • the metal insert will punch through the end enclosure 11 and penetrate deeply into the main charge 1, such as to detonate the charge. This will occur irrespective of whether there is further mechanical obstruction between the end closure and the main charge or not.
  • the invention thus permits the main charge to be configured and enclosed solely on the basis of the demands placed on such an enclosure without regard to detonation problems, since the latter can be solved in accordance with the present invention and essentially quite independently of the configuration and encapsulation of the main charge.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Confectionery (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Gas-Insulated Switchgears (AREA)

Claims (5)

  1. Sprengvorrichtung mit einem Zünder (3), einer Hauptladung (1) und einer Hilfsladung (4), die zwischen dem Zünder und der Hauptladung angeordnet ist und dazu dient, die Hauptladung zu detonieren, wobei die Hauptladung verkapselt und von der Hilfsladung durch mechanische Hindernisse getrennt ist, wobei die Hilfsladung (4) eine Ladung umfaßt, die gerichtete explosive Wirkung aufweist und von dem Typ ist, der bei Detonationen einen Massestrahl hoher Energie und hoher Geschwindigkeit erzeugt, wobei die Hilfsladung (4) so ausgerichtet ist, daß der Strahl in die Hauptladung (1) nach Durchdringung zwischenliegender mechanischer Hindernisse (11) eindringt, wobei die Hilfsladung beabstandet ist von dem mechanischen Hindernis, so daß der Strahl im Stande ist, sich in dem benötigten Maße auszubilden bevor er auf das Hindernis trifft, wobei die Hilfsladung (4) an dem äußeren Ende eines rohrförmigen Elements (8) befestigt ist, dessen inneres Ende abgeschlossen und befestigt ist an einem Schutzgehäuse (2), das die Hauptladung (1) umgibt, wobei das rohrförmige Element (8) durch eine Öffnung in dem Schutzgehäuse (2) ragt, das die Hauptladung (1) umschließt, und das innere Ende (11) des rohrförmigen Elements (8) mit einem Flansch (9) versehen ist, der verbunden ist mit dem Teil der inneren Oberfläche des Schutzgehäuses (2), das die Öffnung umgibt.
  2. Vorrichtung gemäß Anspruch 1, wobei ein Dichtungselement zwischen dem Flansch (9) und der inneren Oberfläche des Schutzgehäuses (2) angeordnet ist.
  3. Vorrichtung gemäß den Ansprüchen 1 oder 2, wobei die Hilfsadung eine Ladung (5) beinhaltet, mit einem metallausgekleideten Hohlraum (6), der sich konisch in Richtung des Strahls erweitert, und der Abstand zwischen der Hilfsladung (4) und dem mechanischen Hindernis (11) im wesentlichen dem größten Durchmesser des Hilfsladungshohlraums (6) entspricht.
  4. Vorrichtung gemäß einem der Ansprüche 1 bis 3, wobei der Strahlverlauf zwischen der Hilfsladung (4) und dem mechanischen Hindernis (11) im wesentlichen frei ist von irgendwelchen Elementen, die die Entwicklung des Massestrahls beeinträchtigen können.
  5. Vorrichtung gemäß Anspruch 4, wobei der Strahlverlauf durch einen abgeschlossenen Raum dargestellt ist, der mit Luft gefüllt, aber ansonsten leer ist.
EP89850197A 1988-06-17 1989-06-15 Explosive Ladung Expired - Lifetime EP0349504B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89850197T ATE80723T1 (de) 1988-06-17 1989-06-15 Explosive ladung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8802292A SE467020B (sv) 1988-06-17 1988-06-17 Anordning vid ett spraengaemnesladdat foeremaal
SE8802292 1988-06-17

Publications (2)

Publication Number Publication Date
EP0349504A1 EP0349504A1 (de) 1990-01-03
EP0349504B1 true EP0349504B1 (de) 1992-09-16

Family

ID=20372662

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89850197A Expired - Lifetime EP0349504B1 (de) 1988-06-17 1989-06-15 Explosive Ladung

Country Status (7)

Country Link
EP (1) EP0349504B1 (de)
AT (1) ATE80723T1 (de)
DE (1) DE68902884T2 (de)
ES (1) ES2034763T3 (de)
GR (1) GR3005955T3 (de)
NO (1) NO169307C (de)
SE (1) SE467020B (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107218851A (zh) * 2017-07-26 2017-09-29 中国水电基础局有限公司 用于冻土开挖的聚能弹
CN108375325B (zh) * 2017-12-05 2023-10-31 物华能源科技有限公司 一种管道线性聚能切割装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT251462B (de) * 1960-09-10 1967-01-10 Dow Chemical Co Unpatronierte Sprengmasse und Einrichtung zur Auslösung der Detonation dieser Sprengmasse
DE3116930C2 (de) * 1981-04-29 1986-05-15 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Vorrichtung zum Initiieren einer Sprengladung
FR2536850A1 (fr) * 1982-11-26 1984-06-01 Luchaire Sa Procede pour l'amorcage de charges explosives

Also Published As

Publication number Publication date
ES2034763T3 (es) 1993-04-01
NO169307B (no) 1992-02-24
EP0349504A1 (de) 1990-01-03
GR3005955T3 (de) 1993-06-07
SE8802292D0 (sv) 1988-06-17
DE68902884T2 (de) 1993-01-07
SE467020B (sv) 1992-05-11
NO892511L (no) 1989-12-18
SE8802292L (sv) 1989-12-18
DE68902884D1 (de) 1992-10-22
NO169307C (no) 1992-06-03
ATE80723T1 (de) 1992-10-15
NO892511D0 (no) 1989-06-16

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