EP4058749A1 - Pyrotechnischer gegenstand - Google Patents
Pyrotechnischer gegenstandInfo
- Publication number
- EP4058749A1 EP4058749A1 EP21802646.6A EP21802646A EP4058749A1 EP 4058749 A1 EP4058749 A1 EP 4058749A1 EP 21802646 A EP21802646 A EP 21802646A EP 4058749 A1 EP4058749 A1 EP 4058749A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ignition
- cross
- opening
- charge
- effect
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C9/00—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition
- F42C9/10—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition the timing being caused by combustion
-
- 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
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
- F42B5/02—Cartridges, i.e. cases with charge and missile
- F42B5/16—Cartridges, i.e. cases with charge and missile characterised by composition or physical dimensions or form of propellant charge, with or without projectile, or powder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
- F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
- F42B12/36—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
Definitions
- the invention relates to a pyrotechnic object, in particular an irritation body, irritation projectile or ammunition, with an ignition device, with a delay chamber which extends along a delay section and in which a delay charge is accommodated, and with at least one and preferably several effect chambers in which or . in each of which an effect set to be ignited is included, the delay chamber being cross-connected to a respective effect chamber via a respective effect chamber branching off from the delay chamber and forming an over-ignition path, wherein in the case of several effect chambers the multiple over-ignition openings are arranged in the order of the sets of effects to be ignited along the ignition path in succession, starting from the delay chamber.
- pyrotechnic objects are widely known. These can be irritating objects, in particular irritating projectiles with a combined flash/bang effect, possibly with fogging, but also ammunition in the broadest sense.
- a delay set is provided along a delay path.
- the delay sentence which can include one to three delay sentences, in particular an ignition sentence, a mixed sentence and a main sentence, has the task of igniting the first effect sentence after a defined time of, for example, 1.5 seconds.
- the delay set is typically arranged axially centrally in the delay chamber forming the delay section and is in particular pressed in.
- a pyrotechnic object in the form of an irritation body with the features of the preamble of claim 1 is previously known from DE 10 2004 059 991 A1.
- DE 38 13 039 A1 discloses a non-generic pyrotechnic object referred to as a delay element with a gas charge, containing an ignition piece with a primer cap and a single continuous channel in a longitudinal direction, which has an ignition channel section, a section for an ignition charge, a section for a delay charge, a Includes section for a transfer rate and a section for a propellant charge to be finally ignited.
- a check valve with a cone and a ball is provided between the ignition channel section and the section for the ignition charge. The bullet is embedded in the ignition charge whose slag supports the seal.
- DE 10 2016 015 042 B4 relates to a non-generic ammunition module with an explosive arrangement in a warhead and an igniter and an ignition channel partially surrounded by the explosive arrangement with pyrotechnic material for igniting the explosive arrangement.
- an ignition channel which is self-sealing in the detonated state. This is realized by providing one or more sealing elements in or near the ignition channel.
- the sealing element can be a body that is introduced into the ignition channel through the at least partially converted explosive in order to seal it.
- the body or the sealing element can also be designed as a casing or sleeve surrounding the ignition channel, see above that it is compressed by the partially reacted explosive and, together with residual pyrotechnic material, causes a sealing of the ignition channel.
- the firing behavior i.e. the kinetics of the progression of the combustion front, and the kinetics of the through hot particles reaching the overignition opening, responsible or operationally critical.
- the firing behavior is u. a. influenced by the pressure conditions and the particle properties of the delay set. (The same applies to the pressure and particle arrangement within each effect set.)
- the present invention is based on the object of addressing this problem, ie the functional reliability of proper ignition in question here pyrotechnic articles in the broadest sense, including ammunition.
- this object is achieved according to the invention in that an overignition charge that is different from the respective effect charge and chemically different from it is introduced into the overignition opening or in the several overignition openings in order to, after it has burned off and through its combustion residue, To close over-ignition opening at least partially and thereby reduce or dampen the propagation of a pressure shock that occurs as a result of the ignition of the effect set in the j eweilen effect chamber and acts on the delay chamber via the j eweile over-ignition opening.
- the compressed delay charge hits one or more of the following transfer ignition openings and thus their associated effect sets, which means an uncontrolled multiple ignition of effect sets.
- the burning delay charge will quickly burn past the subsequent ignition opening and effects chamber as a result of the pressure surge, without igniting the effects charge. This then remains as a potentially dangerous explosive charge in the pyrotechnic object because it has not been ignited.
- the surface geometry of the combustion front of the delay charge can also be changed by the pressure impact in such a way that oblique burn-up occurs, which can also impair proper ignition of the effect charges.
- Local densification of the effect set itself as a result of the pressure hammer from the ignition of previous effect sets favors the occurrence of malfunctions, for example if the material of the effect set no longer touches directly or located behind the mouth of the transfer opening.
- an overignition charge different from the effect charge be deliberately introduced into a respective overignition opening, at least along a part of the overignition path formed thereby.
- this reduces the risk of non-ignitions because the combustion front is guided to a certain extent can safely propagate through the transfer charge through a respective outgoing transfer hole.
- another essential aspect is that the combustion residue immediately after the overignition charge has burned off is able to at least partially close the overignition opening, with the result that the subsequent pressure shock caused by ignition of the effect charge has an impact on the delay chamber and the delay charge located therein is reduced .
- the material of the overfire charge can be formed, for example, from a delay and ignition charge material according to DE 10 2015 014 821 A1; the relevant content of this publication, ie the composition of the ignition or delay charge material, is included in the content of the present application by reference to this publication.
- the over-ignition charge z is over at least 20%, in particular over at least 30%, in particular over at least 40%, in particular over at least 50% and in particular over 100%, in particular over 90% at most, in particular over 80% at most. , in particular over a maximum of 70% of the length of the ignition gap in the ignition opening. If, for example, one takes into account the usual extension of the ignition gap formed by the ignition opening of 5-12 mm, then introducing over 30-100% of the length of the ignition gap proves to be preferable.
- the over-igniting charge in the ignition opening is pressed in. This can be done in any manner and, with regard to economic manufacturability, preferably by means of a ram introduced radially from the outside.
- the ignition charge is introduced into the ignition opening as a pasty medium or at least one that is still capable of flowing and is hardened therein.
- the transfer opening have a cross-sectional change along the transfer gap.
- a change in cross section, in particular an expansion or narrowing of the transfer opening allows the transfer charge introduced into the transfer opening to be better anchored in the transfer opening. This applies in particular to the combustion residue from the ignition charge after it has burned off. As a result, the sealing effect or damping effect of the combustion residue of the over-igniting charge can be further improved.
- a cross-sectional area of the ignition opening increases along the ignition gap, i.e. in the direction of ignition propagation, by at least 10%, in particular by at least 20%, in particular by at least 25%, in particular by a maximum of 60%, in particular by a maximum of 50% % changes .
- a consequent expansion or Verj üngung can be along a continuous or discontinuous course, in particular stepped or conical/conical or also in a rounded form.
- the change in cross section is oriented in such a way that the overignition opening has an increasing cross-sectional area in the direction of ignition propagation, ie an expanding cross section.
- the combustion residue can then become wedged in an overignition opening, which narrows in particular conically or funnel-shaped in the propagation direction of the pressure shock, and can close it like a plug.
- the ignition charge viewed in the longitudinal direction of the ignition gap, is arranged in the area of the change in cross section of the ignition opening, so that the immobilisation and anchoring of its combustion residue is supported by the change in cross section.
- a housing inner body forming the chambers and an outer, in particular cylindrical, sleeve body surrounding the housing inner body, which forms a grippable outer side of the object and preferably in particular by means of optional sealing elements seals further assembly openings that are still open or covered and that communicate with the chambers.
- the interior of the chambers can be effectively protected against environmental influences, in particular penetrating moisture, by means of the sleeve body.
- FIG. 1 shows a longitudinal sectional view of a pyrotechnic article designed according to the invention
- FIG. 2 shows an enlarged detail from FIG.
- the inventively designed pyrotechnic object 2 shown in the figures for example in the form of an irritation projectile 4 of the BTV "bottom top venting" type (i.e. with blowing out upwards and downwards or in axially opposite directions), comprises an ignition device 6 of previously known design .
- the ignition device 6 includes a manually held or. rocker arm 8 that can be pressed and released, a removable retaining ring (not shown), a spring 10, a hammer 12 and a percussion cap 14 of a known type, which are therefore not described in detail.
- a deceleration chamber 16 which is embodied here by way of example as a bore, extends axially below the percussion cap 14 along a deceleration path 18, in which at least one delay set 20 is arranged.
- the deceleration chamber 16 extends along an axial longitudinal direction 24 within a housing inner body 22 , which is embodied as solid, for example, in the middle and forms and delimits the deceleration section 18 .
- Radially outside the delay chamber 16 are also in the axial longitudinal direction 24 extended and turret-like and arranged concentrically with respect to the delay chamber 16 effect chambers 26 are provided, of which only one is shown in Figure 1 according to the sectional plane.
- an effect set 28 to be ignited, preferably in the form of a uniformly introduced particle material.
- this application refers to an effect set or an effect set material, this can be, for example, a flash charge and/or a bang charge and/or a smoke charge as an explosive.
- a respective effect chamber 26 is connected to the centrally arranged delay chamber 16 via a respective over-ignition opening 30 .
- the transfer opening 30 is designed here as a bore.
- a combustion front of the deceleration charge 20 is intended to propagate from the ignition device 6 in the axial longitudinal direction 24 along the deceleration path 18 .
- the combustion front reaches the first or a subsequent overignition opening 30, which in this case branches off radially by way of example, it should be overignited through this in the intended manner
- the effect set 28 in the associated effect chamber 26 can be ignited through the over-ignition opening 30 .
- the set of effects exploding as a result of ignition is ejected upwards and downwards in the axial longitudinal direction 24 with the associated intended effect.
- the combustion front spreads further axially in the delay chamber 16 until it reaches the next overignition opening 30 in the direction of the delay section 18 and in the same way, as intended, causes the effect set 28 to be ignited in the associated effect chamber 26 .
- an overignition charge 32 is intentionally introduced into the overignition opening 30, specifically at least along a part of the extent of the overignition opening 30 or the ignition gap 34 formed by them (FIG. 2).
- the introduction of the over-ignition charge 32 into the over-ignition opening 30 can further ensure that significantly more hot particles spread through the over-ignition opening 30 in the direction of the effect chamber 26 and result in the safe ignition of the effect charge 28 .
- the combustion residue 36 therefore preferably comprises a not inconsiderable proportion of slag, which can remain and become wedged within the ignition opening 30 .
- a considerable pressure shock occurs, which propagates not only in the axial longitudinal direction 24 but also through the overignition opening 30 .
- this pressure impact now leads to a compression of the combustion residue 36 within the overignition opening 30 . That is , the residue of combustion 36 helps to reduce or dampen the effects and propagation of the pressure surge through the pilot orifice 30 back toward the retard chamber 16 . As explained in detail at the outset, this proves to be advantageous with regard to improving the reliability of the intended firing of the effect sets in sequence.
- the transfer opening 30 has a cross-sectional change 40 along the extension of the transfer gap 34, and the cross-sectional change 40 is preferably oriented in such a way that the transfer opening 30 has a has increasing cross-sectional area.
- the cross-sectional change 40 is conical or funnel-shaped in FIG. This shape can be formed, for example, in the form of a stepped bore, in which a radial bore is introduced into the housing inner body 22 from radially outside first with a small diameter drill and then with a larger diameter drill. In this way, the profile of the change in cross section 40 can also be machined in the desired manner.
- access is provided from the radial outside through a further radial opening 42 in the inner housing body 22 , which is then closed by a blind rivet 44 .
- the housing inner body 22 receives a cylindrical sleeve body 46 radially outside, which forms a manually grippable outside 48 of the object 2 and, for example, uses two O-ring seals 50 to reliably seal the other radial openings 42 from environmental influences.
- the overignition charge z is arranged in the area of the cross-sectional change 40 and is preferably immobilized there, then the pressure surge-reducing or dampening effect of the combustion residue 36 of the overignition charge 32 is particularly effective.
- the combustion residue 36 is partially compressed, as already explained, so that the particles of the combustion residue 36 wedge against each other in the overignition opening 30 and become an obstacle that is more difficult to overcome in terms of pressure.
- the deceleration charge 20 located in the deceleration chamber 16 and its combustion front, which continues to advance as intended are better protected from the effects of the pressure shock.
- the functional safety and reliability of the ignition of the subsequent effect sets 28 can be significantly improved.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Air Bags (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020129200.7A DE102020129200A1 (de) | 2020-11-05 | 2020-11-05 | Pyrotechnischer Gegenstand |
| PCT/EP2021/080098 WO2022096385A1 (de) | 2020-11-05 | 2021-10-29 | Pyrotechnischer gegenstand |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4058749A1 true EP4058749A1 (de) | 2022-09-21 |
| EP4058749B1 EP4058749B1 (de) | 2023-05-10 |
Family
ID=78528925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21802646.6A Active EP4058749B1 (de) | 2020-11-05 | 2021-10-29 | Pyrotechnischer gegenstand |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US12196536B2 (de) |
| EP (1) | EP4058749B1 (de) |
| DE (1) | DE102020129200A1 (de) |
| WO (1) | WO2022096385A1 (de) |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE624024A (de) * | 1961-10-24 | |||
| DE2842797C2 (de) * | 1978-09-30 | 1986-01-23 | Nico-Pyrotechnik Hans-Jürgen Diederichs KG, 2077 Trittau | Wurfkörper |
| US4791870A (en) * | 1983-04-05 | 1988-12-20 | Haley & Weller Limited | Pyrotechnic assembly |
| DE3813039A1 (de) | 1988-04-19 | 1989-11-02 | Dynamit Nobel Ag | Verzoegerungselement mit rueckschlagventil und integriertem gassatz |
| US4998751A (en) * | 1990-03-26 | 1991-03-12 | Morton International, Inc. | Two-stage automotive gas bag inflator using igniter material to delay second stage ignition |
| US5983801A (en) * | 1998-04-29 | 1999-11-16 | Brunn; Michael | Separating smoke grenade |
| DE102004059991B4 (de) * | 2004-12-13 | 2007-03-15 | Nico-Pyrotechnik Hanns-Jürgen Diederichs GmbH & Co. KG | Irritationskörper |
| DE102008058776A1 (de) * | 2008-11-24 | 2010-05-27 | Rheinmetall Waffe Munition Gmbh | Irritationskörper mit Zusatzeffekt |
| DE102010052210B4 (de) * | 2010-11-24 | 2021-10-07 | Rheinmetall Waffe Munition Gmbh | Leistungsvariabler Irritationskörper |
| US9989341B2 (en) * | 2014-04-21 | 2018-06-05 | Orbital Atk, Inc. | Stun grenades and methods of assembling stun grenades |
| CA2969148C (en) * | 2014-12-10 | 2021-02-16 | Ruag Ammotec Ag | Detonator system for hand grenades |
| DE102015014821A1 (de) | 2015-11-18 | 2017-05-18 | Rheinmetall Waffe Munition Gmbh | REACh konformer pyrotechnischer Verzögerungs- und Anzündsatz mit variabel einstellbaren Leistungsparametern |
| DE102016015042B4 (de) | 2016-12-16 | 2018-08-23 | Diehl Defence Gmbh & Co. Kg | Munitionsmodul, Gefechtskopf und Munition |
| DE102017108938B4 (de) * | 2017-04-26 | 2023-05-17 | Rheinmetall Waffe Munition Gmbh | Irritationskörper mit Mitteln zur Einstellung einer Wirkleistung |
-
2020
- 2020-11-05 DE DE102020129200.7A patent/DE102020129200A1/de not_active Withdrawn
-
2021
- 2021-10-29 WO PCT/EP2021/080098 patent/WO2022096385A1/de not_active Ceased
- 2021-10-29 EP EP21802646.6A patent/EP4058749B1/de active Active
-
2023
- 2023-05-03 US US18/142,651 patent/US12196536B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022096385A1 (de) | 2022-05-12 |
| US12196536B2 (en) | 2025-01-14 |
| EP4058749B1 (de) | 2023-05-10 |
| DE102020129200A1 (de) | 2022-05-05 |
| US20240118062A1 (en) | 2024-04-11 |
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