EP0872702B1 - Pyrotechnic charge located within a tube - Google Patents

Pyrotechnic charge located within a tube Download PDF

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Publication number
EP0872702B1
EP0872702B1 EP98106895A EP98106895A EP0872702B1 EP 0872702 B1 EP0872702 B1 EP 0872702B1 EP 98106895 A EP98106895 A EP 98106895A EP 98106895 A EP98106895 A EP 98106895A EP 0872702 B1 EP0872702 B1 EP 0872702B1
Authority
EP
European Patent Office
Prior art keywords
tube
ball
pyrotechnical charge
silicone layer
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
EP98106895A
Other languages
German (de)
French (fr)
Other versions
EP0872702A3 (en
EP0872702A2 (en
Inventor
Günter Berg
Dieter Faust
Erwin Wrobel
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.)
Diehl Stiftung and Co KG
Original Assignee
Diehl Stiftung and Co KG
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 Diehl Stiftung and Co KG filed Critical Diehl Stiftung and Co KG
Publication of EP0872702A2 publication Critical patent/EP0872702A2/en
Publication of EP0872702A3 publication Critical patent/EP0872702A3/en
Application granted granted Critical
Publication of EP0872702B1 publication Critical patent/EP0872702B1/en
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
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B8/00—Practice or training ammunition
    • F42B8/12—Projectiles or missiles
    • F42B8/26—Hand grenades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B4/00—Fireworks, i.e. pyrotechnic devices for amusement, display, illumination or signal purposes

Definitions

  • the invention relates to a pyrotechnic charge in a pipe the preamble of claim 1.
  • a cannon strike is known from DE 19 69 984 U. This consists of one hollow body made of foam plastic. A bang mix is in the cargo area of the hollow body is circumferentially insulated. A cylindrical plug made of foam plastic closes the hole in the cargo area. The stopper is with one Emulsion adhesive connected to the hollow body. The plug is only used for fixation the bang charge. It has no damaging effect. On a moisture-preventing Property of foam plastic and glue comes not at it.
  • the object of the invention is therefore a closure with a dam effect for a pyrotechnic charge, in which parts fly away these have a very low mass, so that the transmitted through these parts Energy remain well below a permissible value.
  • FIG. 1 shows a hand grenade in longitudinal section and FIG. 2 shows an enlarged one drawn section of a charge tube according to FIG. 1.
  • a practice hand grenade 1 shown in dash-dot lines has a central charge tube 3 with primer 5, a time-delayed set 7 and a bang charge 9 on.
  • the charge tube 3 closes with its free end face 11 approximately with the lower one Face 13 of the practice grenade 1.
  • a hole 15 takes the bang charge 9 on.
  • the charge tube 3 has a conical seat 17 for a ball 18 from a light, foamed styrene and a recess 19 for one disk-shaped or lid-shaped silicone layer 21 consisting of a vulcanizable Silicone rubber.
  • This is crater-shaped 27 with respect to the ball 18 and conical 28 with respect to the conical seat 17.
  • the ball 18 is seated in the conical seat 17 with a slight preload, with about 50% the spherical surface is glued to the silicone layer 21.
  • the silicone layer 21 is in turn over the surface of the recess 19 and part of the conical seat 17 glued to the charge tube 3.
  • a very thin, membrane-shaped layer 31 of the silicone layer 21 enables the ball 18 exits the charge tube 3.
  • the diameter 23 of the recess 19 is larger than the diameter 25 of the Ball 18. Because of this and through the conical seat 17, 28 or the edge 29 there is a Large adhesive surface of the silicone layer 21 on the charge tube 3 and on the ball 18 before. In the event of hard impacts in the axial direction of the charge tube 3, this ensures that the bang charge 9 applied to the ball 18 by the from which Ball 18 and the silicone layer 21 existing closure 30 an opening 33 the charge tube 3 closes securely.
  • the time-delayed set 7 burns and ignites the bang charge 9.
  • the gas pressure of the bang charge 9 drives the ball 18 out of it Tapered seat 17.
  • the silicon layer 21 increases in the area of the layer 31 deformed until the ball 18 thins the increasingly thin silicon layer 21, 31 pierces.
  • the silicone layer 21, 31 therefore remains on the charge tube 3 while the ball 18 due to its very small mass and large Drag quickly falls to the ground. The given conditions for the kinetic energy and flying distance of flying parts are not achieved, so that the security conditions are met.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Toys (AREA)
  • Materials For Medical Uses (AREA)

Abstract

Practice hand grenade or fire brigade device comprises a pyrotechnic charge in a tube. The tube has a closure which opens under gas pressure. The closure (30) has at least two sections, and an outer silicone layer (21) near the tube opening (33), joins a lightweight closure (18) to the tube (3). The closure pref. consists of a foamed material, e.g. styrene.

Description

Die Erfindung bezieht sich auf eine pyrotechnische Ladung in einem Rohr nach dem Oberbegriff des Anspruchs 1.The invention relates to a pyrotechnic charge in a pipe the preamble of claim 1.

Aus der DE 19 69 984 U ist ein Kanonenschlag bekannt. Dieser besteht aus einem aus Schaumkunststoff bestehenden Hohlkörper. Eine Knallmischung ist im Ladungsraum des Hohlkörpers umfangsseitig verdämmt. Ein Zylindrischer Stopfen aus Schaumkunststoff verschließt die Bohrung des Ladungsraumes. Der Stopfen ist mit einem Emulsionskleber mit dem Hohlkörper verbunden. Der Stopfen dient nur zur Fixierung der Knallladung. Er weist keine verdämmende Wirkung auf. Auf eine feuchtigkeitsverhindernde Eigenschaft des Schaumkunststoffs und des Klebers kommt es nicht an.A cannon strike is known from DE 19 69 984 U. This consists of one hollow body made of foam plastic. A bang mix is in the cargo area of the hollow body is circumferentially insulated. A cylindrical plug made of foam plastic closes the hole in the cargo area. The stopper is with one Emulsion adhesive connected to the hollow body. The plug is only used for fixation the bang charge. It has no damaging effect. On a moisture-preventing Property of foam plastic and glue comes not at it.

Aufgabe der Erfindung ist es daher, einen Verschluss mit Verdämmungswirkung für eine pyrotechnische Ladung zu schaffen, bei dem zwar Teile wegfliegen aber diese eine sehr geringe Masse aufweisen, so dass die durch diese Teile übertragene Energie weit unterhalb eines zulässigen Wertes bleiben.The object of the invention is therefore a closure with a dam effect for a pyrotechnic charge, in which parts fly away these have a very low mass, so that the transmitted through these parts Energy remain well below a permissible value.

Die Erfindung löst diese Aufgabe entsprechend den kennzeichnenden Merkmalen des Anspruches 1. Vorteilhafte Weiterbildungen der Erfindung sind den Unteransprüchen zu entnehmen.The invention solves this problem in accordance with the characterizing features of claim 1. Advantageous developments of the invention are the dependent claims refer to.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt.An embodiment of the invention is shown in the drawing.

Es zeigt Fig. 1 eine Übungshandgranate im Längsschnitt und Fig. 2 einen vergrößert gezeichneten Abschnitt eines Ladungsrohres nach Fig. 1. 1 shows a hand grenade in longitudinal section and FIG. 2 shows an enlarged one drawn section of a charge tube according to FIG. 1.

Eine strichpunktiert gezeichnete Übungshandgranate 1 weist ein zentrales Ladungsrohr 3 mit Zündkapsel 5, einen zeitverzögernden Satz 7 und eine Knallladung 9 auf.A practice hand grenade 1 shown in dash-dot lines has a central charge tube 3 with primer 5, a time-delayed set 7 and a bang charge 9 on.

Das Ladungsrohr 3 schließt mit seiner freien Stirnseite 11 etwa mit der unteren Stirnfläche 13 der Übungshandgranate 1 ab. Eine Bohrung 15 nimmt die Knallladung 9 auf. Endseitig weist das Ladungsrohr 3 einen Kegelsitz 17 für eine Kugel 18 aus einem leichten, geschäumten Styrol und eine Ausnehmung 19 für eine scheiben- oder deckelförmige Silikonschicht 21 bestehend aus einem vulkanisierbaren Silikonkautschuk auf. Diese ist in Bezug auf die Kugel 18 kraterförmig 27 und bezüglich des Kegelsitzes 17 keglig 28 ausgebildet. Dadurch liegt ein spitz zulaufender Rand 29 vor, der die Kugel 18 streifenförmig einhüllt.The charge tube 3 closes with its free end face 11 approximately with the lower one Face 13 of the practice grenade 1. A hole 15 takes the bang charge 9 on. At the end, the charge tube 3 has a conical seat 17 for a ball 18 from a light, foamed styrene and a recess 19 for one disk-shaped or lid-shaped silicone layer 21 consisting of a vulcanizable Silicone rubber. This is crater-shaped 27 with respect to the ball 18 and conical 28 with respect to the conical seat 17. This is a point tapered edge 29, which envelops the ball 18 in strips.

Im Kegelsitz 17 sitzt die Kugel 18 mit leichter Vorspannung, wobei etwa 50 % der Kugeloberfläche mit der Silikonschicht 21 verklebt ist. Die Silikonschicht 21 ist ihrerseits über die Oberfläche der Ausnehmung 19 und eines Teils des Kegelsitzes 17 mit dem Ladungsrohr 3 verklebt.The ball 18 is seated in the conical seat 17 with a slight preload, with about 50% the spherical surface is glued to the silicone layer 21. The silicone layer 21 is in turn over the surface of the recess 19 and part of the conical seat 17 glued to the charge tube 3.

Eine sehr dünne, membranförmige Schicht 31 der Silikonschicht 21 ermöglicht der Kugel 18 den Austritt aus dem Ladungsrohr 3.A very thin, membrane-shaped layer 31 of the silicone layer 21 enables the ball 18 exits the charge tube 3.

Der Durchmesser 23 der Ausnehmung 19 ist größer als der Durchmesser 25 der Kugel 18. Dadurch und durch den Kegelsitz 17, 28 bzw. den Rand 29 liegt eine große Klebeoberfläche der Silikonschicht 21 am Ladungsrohr 3 und an der Kugel 18 vor. Bei harten Stößen in Achsrichtung des Ladungsrohres 3 ist damit gewährleistet, dass die an der Kugel 18 anliegende Knallladung 9 durch den, aus der Kugel 18 und der Silikonschicht 21 bestehenden Verschluss 30 eine Öffnung 33 des Ladungsrohres 3 sicher verschließt.The diameter 23 of the recess 19 is larger than the diameter 25 of the Ball 18. Because of this and through the conical seat 17, 28 or the edge 29 there is a Large adhesive surface of the silicone layer 21 on the charge tube 3 and on the ball 18 before. In the event of hard impacts in the axial direction of the charge tube 3, this ensures that the bang charge 9 applied to the ball 18 by the from which Ball 18 and the silicone layer 21 existing closure 30 an opening 33 the charge tube 3 closes securely.

Nach Zündung der Zündkapsel 5 brennt der zeitverzögernde Satz 7 ab und zündet die Knallladung 9. Der Gasdruck der Knallladung 9 treibt die Kugel 18 aus ihrem Kegelsitz 17. Dabei wird die Silikonschicht 21 im Bereich der Schicht 31 zunehmend verformt, bis die Kugel 18 die immer dünner werdende Silikonschicht 21, 31 durchstößt. Die Silikonschicht 21, 31 verbleibt daher am Ladungsrohr 3, während die Kugel 18 aufgrund ihrer sehr geringen Masse und aufgrund des großen Luftwiderstandes rasch zu Boden fällt. Die vorgegebenen Bedingungen für die kinetische Energie und Flugdistanz von wegfliegenden Teilen werden nicht erreicht, so dass die Sicherheitsbedingungen erfüllt sind.After ignition of the primer 5, the time-delayed set 7 burns and ignites the bang charge 9. The gas pressure of the bang charge 9 drives the ball 18 out of it Tapered seat 17. The silicon layer 21 increases in the area of the layer 31 deformed until the ball 18 thins the increasingly thin silicon layer 21, 31 pierces. The silicone layer 21, 31 therefore remains on the charge tube 3 while the ball 18 due to its very small mass and large Drag quickly falls to the ground. The given conditions for the kinetic energy and flying distance of flying parts are not achieved, so that the security conditions are met.

Claims (8)

  1. A pyrotechnical charge (9) in a tube (3), for a practice grenade (1) or pyrotechnical article, with a closure (30) comprising at least two parts, the tube (3) being closed by a very lightweight closure element (18) which is glued together with the tube (3) and is to be opened by gas pressure,
    characterized in that
    the closure element (18) is in the form of a ball (18) of small mass,
    and in that, in the region of the opening (33) of the tube (3), an outer, approximately disk-shaped silicone layer (21) connects the ball (18) to the tube (3).
  2. A pyrotechnical charge in a tube according to Claim 1,
    characterized in that
    the ball (18) is made of a foamed material, such as styrene.
  3. A pyrotechnical charge in a tube according to Claim 1,
    characterized in that
    the tube (3) is provided with a conical seat (17) for the ball (18).
  4. A pyrotechnical charge in a tube according to Claim 3,
    characterized in that
    the tube (3) has a recess (19) for receiving the approximately disk-shaped silicone layer (21) and
    the diameter (23) of the recess (19) is larger than that of the ball (18).
  5. A pyrotechnical charge in a tube according to Claim 1,
    characterized in that
    the silicone layer (21) is made of a vulcanizable silicone rubber.
  6. A pyrotechnical charge in a tube according to Claim 1,
    characterized in that,
    in the principal axis of the tube (3), a membrane-like layer (31) of the silicone layer (21) rests against the ball (18) or is glued together with the ball (18).
  7. A pyrotechnical charge in a tube according to Claim 1,
    characterized in that
    the pyrotechnical charge (9) rests against the closure element (18).
  8. A pyrotechnical charge in a tube according to Claims 1 and 3,
    characterized in that
    the closure element (18) is glued over approximately half its surface to the silicone layer (21), a conically tapering edge (29) of the silicone layer partly enclosing the closure element (18).
EP98106895A 1997-04-19 1998-04-16 Pyrotechnic charge located within a tube Expired - Lifetime EP0872702B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19716511 1997-04-19
DE19716511A DE19716511A1 (en) 1997-04-19 1997-04-19 Pyrotechnic charge in a tube

Publications (3)

Publication Number Publication Date
EP0872702A2 EP0872702A2 (en) 1998-10-21
EP0872702A3 EP0872702A3 (en) 2000-01-26
EP0872702B1 true EP0872702B1 (en) 2003-10-01

Family

ID=7827084

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98106895A Expired - Lifetime EP0872702B1 (en) 1997-04-19 1998-04-16 Pyrotechnic charge located within a tube

Country Status (5)

Country Link
EP (1) EP0872702B1 (en)
AT (1) ATE251301T1 (en)
DE (2) DE19716511A1 (en)
DK (1) DK0872702T3 (en)
NO (1) NO317408B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202004018014U1 (en) * 2004-11-20 2006-04-27 Diehl Bgt Defence Gmbh & Co. Kg Pipe with a pyrotechnic charge comprises a closure layer adhered to a closure member over one end

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR844961A (en) * 1937-10-20 1939-08-07 Anciens Ets Skoda Dynamic self-timer projectile and relay
FR1439815A (en) * 1961-03-13 1966-05-27 Zd Y Rijnove Revoluce Narodni Explosion-proof, delayed electric detonator
DE1969984U (en) * 1967-02-28 1967-10-05 Bock Geb BANGERS WITH CANNON STRIKE.
DE7235812U (en) * 1972-09-29 1973-02-08 Diehl Training hand grenade
IT1057038B (en) * 1976-03-15 1982-03-10 Moneta F HAND GRENADE ITS ASSEMBLY PROCEDURE AND ITS ADAPTATION FOR EXERCISE USE
AT396304B (en) * 1991-03-26 1993-08-25 Oregon Ets Patentverwertung Practice hand grenade detonator (fuze)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202004018014U1 (en) * 2004-11-20 2006-04-27 Diehl Bgt Defence Gmbh & Co. Kg Pipe with a pyrotechnic charge comprises a closure layer adhered to a closure member over one end

Also Published As

Publication number Publication date
EP0872702A3 (en) 2000-01-26
ATE251301T1 (en) 2003-10-15
NO981703L (en) 1998-10-20
DK0872702T3 (en) 2004-02-02
NO317408B1 (en) 2004-10-25
DE19716511A1 (en) 1998-10-22
DE59809762D1 (en) 2003-11-06
NO981703D0 (en) 1998-04-16
EP0872702A2 (en) 1998-10-21

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