EP2537561B1 - Élément de blocage destiné à fermer un ouverture - Google Patents

Élément de blocage destiné à fermer un ouverture Download PDF

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Publication number
EP2537561B1
EP2537561B1 EP12004439.1A EP12004439A EP2537561B1 EP 2537561 B1 EP2537561 B1 EP 2537561B1 EP 12004439 A EP12004439 A EP 12004439A EP 2537561 B1 EP2537561 B1 EP 2537561B1
Authority
EP
European Patent Office
Prior art keywords
opening
solid
blocking element
pyrotechnic composition
pyrotechnic
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.)
Not-in-force
Application number
EP12004439.1A
Other languages
German (de)
English (en)
Other versions
EP2537561A3 (fr
EP2537561A2 (fr
Inventor
Arno Hahma
Oliver Pham
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 Defence GmbH and Co KG
Original Assignee
Diehl BGT Defence GmbH 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=46319545&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2537561(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Diehl BGT Defence GmbH and Co KG filed Critical Diehl BGT Defence GmbH and Co KG
Publication of EP2537561A2 publication Critical patent/EP2537561A2/fr
Publication of EP2537561A3 publication Critical patent/EP2537561A3/fr
Application granted granted Critical
Publication of EP2537561B1 publication Critical patent/EP2537561B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C2/00—Fire prevention or containment
    • A62C2/06—Physical fire-barriers
    • A62C2/065—Physical fire-barriers having as the main closure device materials, whose characteristics undergo an irreversible change under high temperatures, e.g. intumescent
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways

Definitions

  • the invention relates to a locking element for closing an opening.
  • a blocking element is already known and is used for example in cable ducts application.
  • These cable ducts are made of a non-combustible material and are inside, d. H. in the passage, equipped with a thermally expandable solid which expands in case of fire by the heat developed during the fire and thereby closes the cable channel and thus prevents fire propagation in the cable duct.
  • the disadvantage here is that a fire in the cable channel can already be further advanced until it comes to the closure of the cable channel. This problem occurs especially in fires that develop relatively little heat, for example because of a lack of oxygen.
  • a blocking element for closing a passage comprising a heat-releasing pyrotechnic composition during firing and a thermally expandable solid.
  • the pyrotechnic charge and the solid are arranged to each other and to the passage and the solid and the pyrotechnic composition are selected so that the solid expands upon burning of the pyrotechnic charge and thereby closes the passage.
  • the solid and the pyrotechnic composition are chosen so that the released during combustion of the pyrotechnic charge heat is sufficient to expand the solid.
  • the solid and the pyrotechnic composition are arranged to each other so that when burning of the pyrotechnic charge sufficient for the expansion of the solid heat transfer takes place on the solid. Furthermore, the pyrotechnic composition and the solid are arranged such that the solid which expands upon combustion of the pyrotechnic composition passes through the passageway and thereby closes it or actuates a mechanism which closes the passageway.
  • the mechanism may be, for example, a slider or flap which closes the passageway.
  • Such a blocking element can be used to close any passageways.
  • the blocking element of DE 196 17 017 A1 has the advantage that it can block the passage much faster and more reliably and less heat is required.
  • the latter blocking element has the great advantage that even a small fire, which generates relatively little heat, can ignite the pyrotechnic composition quickly and reliably. This allows an immediate and complete closure of the cable channel and thus a reliable prevention of fire propagation can be achieved.
  • squibs To ignite active compositions in existing from a propellant charge and an active mass pyrotechnic decoys usually so-called squibs are used.
  • a squib is usually installed in a fuse element with a sliding protection and placed between the propellant and the active mass.
  • the burning propellant causes ignition of the squib through a first opening.
  • a second opening is arranged in the squib, which is aligned with an opening in the securing element.
  • a slider closes the opening in the securing element and thereby prevents a flame passing through the second opening of the firing squib from prematurely igniting the active mass.
  • the slider releases the opening in the securing element only when the burning propellant has expelled the remaining decoy from its sleeve. This reliably prevents the active mass from being set on fire prematurely and, for example, still reacting in the plane shooting the decoy. After ejection from the sleeve ignites the flame of the burning squib the active mass through the second opening and then released from the slide opening in the fuse element.
  • a disadvantage is that this ignition is not reliable and fast at a moving at high speed decoy, because in the direction of flight behind the fuse element, a negative pressure is created, which pulls the flame through the first opening from the squib backwards.
  • the flame passing through the second opening and the opening in the securing element on the side of the effective mass is very weak and a firing delay of up to a few seconds may occur.
  • the ignition delay should be at most 100 milliseconds.
  • a very fast burning pyrotechnic kit can be used to make the squib.
  • this has the disadvantage that the squib ignited when the slide is still closed due to the rapid burning and the associated rapid pressure increase is easily ejected in the direction of the propellant and then the active mass can not ignite.
  • an intermediate wall with a small opening can be arranged in the squib. After ignition on the propellant charge side ignition takes place on the effective mass side of the squib through the small opening. Due to the fact that the opening is small, some pressure is built up on the active mass side in spite of a vacuum on the propellant charge side so that the flames can blow increasingly in the direction of the active mass and thereby ignite the active mass.
  • the production of such a squib is complex and expensive. The squib must be pressed from two sides and the small opening must be made manually by means of a thin wire. Desirable would be an alternative with little effort and low cost to produce squib, with the effective mass of a decoy can be reliably ignited.
  • Object of the present invention is therefore to provide a blocking element without the disadvantages described above.
  • the container having the opening with the pyrotechnic composition and solid disposed therein comprises at least one further opening.
  • the pyrotechnic set can then be ignited through the opening.
  • the closing of the opening by the solid causes the flame formed during combustion to be blown outward through the additional opening in the container through the additional pressure that is thereby produced.
  • This is also the case when there is a negative pressure on the side of the opening outside the container.
  • the flame can reliably ignite, for example, an active mass.
  • the named container can be used as a squib.
  • the blocking element according to the invention has the advantage that it is very reliable and at the same time easy to manufacture. In particular, it does not have to have an intermediate wall with the same to be produced therein, as in the case of an embodiment of a known squib Opening to be provided. Another advantage is that the opening can be relatively large because of the later occlusion. By such an opening is a more reliable and faster ignition of the pyrotechnic charge, for example, by a propellant, possible as through the openings known Zündpillen which keeps as small as possible because of the described negative pressure problem.
  • the blocking element according to the invention can be used in a conventional securing element with sliding safety, so that retrofitting is possible without conversion of production.
  • a particular advantage in the case of decoys is that, due to the closure of the opening by the expandable solid, little or nothing can be seen from the flame arising during combustion of the pyrotechnic charge. This is particularly important for spectral decoys, because the spectrum of the firing pyrotechnic set differs significantly from the spectrum of the active mass of the decoy and thus can reveal detection systems that this is only a decoy and not an aircraft.
  • the avoidance or reduction of an externally detectable from the combustion of the pyrotechnic charge of a squib resulting radiation is a significant advantage of the blocking element according to the invention and guaranteed in any known squib.
  • the passage is an opening and the blocking element further comprises a container having the opening, wherein the pyrotechnic charge and the solid are arranged in the container and the container has at least one further, in particular not to be closed, opening.
  • the blocking element is part of a pyrotechnic ignition means, in particular for igniting an active mass, in particular an active mass of a pyrotechnic decoy target.
  • the ignition means further comprises a securing element with an additional opening aligned with the further opening and with a mechanical closure means for closing the additional opening.
  • the closure means may be a sliding safety device with a slide closing the additional opening.
  • the release of the additional opening by the closure means can not be effected by the burning of the pyrotechnic charge but only mechanically. As a result, an involuntary ignition of an active mass can be reliably prevented.
  • the blocking element according to the invention is then particularly advantageous if the expanded solid such. B. Blähgrafit or a silicate, although in the opening withstand a predetermined pressure, however, yields at exceeding the predetermined pressure and is pushed through the opening. As long as there is still expandable solid within the container, this leads to the fact that within the container no excessive pressure builds up, but the opening is immediately closed as soon as the closure means releases the additional opening aligned with the further opening. As a result, the mechanical load of the container when burning the pyrotechnic charge is relatively low.
  • the container can therefore be made of relatively inexpensive material, for example a plastic, in particular polyamide. The manufacturing can be done inexpensively in an injection molding process.
  • the closure means in particular in the form of a sliding safety device, can be designed such that it keeps the additional opening closed at the beginning of the firing of the pyrotechnic composition and opens before the end of the firing of the pyrotechnic composition and before the expandable solid has completely expanded.
  • the pyrotechnic composition and the solid are compressed together in a compressed form.
  • the pressing can be done so that the pyrotechnic charge and the solid are arranged spatially separated from each other. Standing there the solid and the compressed concentrate are in contact with each other over only one surface.
  • the solid is distributed in the pyrotechnic composition.
  • This has the advantage that the blocking element can be produced in a single pressing operation.
  • this has the disadvantage that the flame generated in the pyrotechnic composition has a lower temperature, because the solid does not contribute to the combustion and the energy deprives the flame. As a result, the ignition of an active mass may be delayed somewhat, ie the ignition time is extended in such a blocking element.
  • a spatial separation can be effected, for example, by first pressing a thin layer of the solid and then pressing a slightly thicker layer of the pyrotechnic composition. Both can be introduced into the container so that the layer formed by the solid in the direction of the opening and the layer formed by the pyrotechnic composition is arranged in the direction of the further opening. As a result, a quick closure of the opening and an intense flame discharge are ensured by the further opening after ignition.
  • the solid is bound with a binder, in particular polychloroprene.
  • the solid may comprise expandable graphite or a silicate, especially sodium silicate.
  • the pyrotechnic composition usually comprises a fuel, in particular boron, and an oxidizing agent, in particular bismuth trioxide or barium nitrate.
  • the figure shows schematically a section through a pyrotechnic blocking element 10 according to the invention with a pyrotechnic composition 12 and a thermally expandable solid 14 pressed therewith.
  • the pyrotechnic composition 12 and the thermally expandable solid 14 are arranged in the container 16 compressed from two parts.
  • On the side of the thermally expandable solid 14 of the container 16 is the opening 18 and on the opposite side of the container 16, the further opening 20.
  • Such a blocking element 10 can be arranged between a disposed on the side of the opening 18 and a propellant on the side of be arranged further opening 20 arranged decoy active material within a securing element with a sliding safety.
  • the compressed solid of the expanding solid and the pyrotechnic composition preferably has a through hole. As a result, a fast and reliable ignition of the pyrotechnic set 12 from opening 18 can be ensured.
  • the flame formed by the pyrotechnic composition 12 is blown out of the further opening 20 and not as in a conventional squib without the thermally expandable solid 14 pulled out of the opening 18 when there is a negative pressure on the side of the opening 18.
  • the flame blown out of the further opening 20 ignites more reliably and faster than a conventional squib a fake target active mass arranged on the side of the further opening 20.
  • the Blähgrafit is so too high pressure in the container and is pushed to the outside. When the slide was open, however, the flame exited only through the further opening.
  • the pyrotechnic composition used was a mixture of boron as fuel and bismuth trioxide as oxidant.
  • a pyrotechnic charge of barium nitrate has been used as the oxidant to provide a slower-burning and less-gas burning but higher-temperature pyrotechnic charge.
  • Example 2 Instead of the relatively weakly expanding expandable graphite used in Example 1, an expanding expandable graphite was used which expanded to about 500 ml / g. When burned, the same results as in Example 1 showed.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Air Bags (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Claims (8)

  1. Élément de blocage (10) destiné à fermer une ouverture (18), comprenant un ensemble pyrotechnique (12) qui libère de la chaleur lors de la combustion et un solide thermiquement expansible (14),
    l'élément de blocage (10) comprenant en outre un contenant (16) comprenant l'ouverture (18) et au moins une autre ouverture (20), dans lequel l'ensemble pyrotechnique (12) et le solide (14) sont agencés,
    l'ensemble pyrotechnique (12) et le solide (14) étant agencés l'un par rapport à l'autre et par rapport aux ouvertures (18, 20) et le solide (14) et l'ensemble pyrotechnique (12) étant choisis de sorte que le solide (14) subisse une expansion lors de la combustion de l'ensemble pyrotechnique (12) et ferme ainsi l'ouverture (18), de sorte qu'après l'expansion du solide (14), la flamme formée par l'ensemble pyrotechnique (12) soit soufflée à l'extérieur de l'autre ouverture (20).
  2. Élément de blocage (10) selon la revendication 1, dans lequel l'élément de blocage (10) est un constituant d'un moyen d'allumage pyrotechnique, notamment pour l'allumage d'une masse active, notamment d'une masse active d'une cible fictive pyrotechnique.
  3. Élément de blocage (10) selon la revendication 2, dans lequel le moyen d'allumage comprend un élément de sécurité comprenant une ouverture supplémentaire alignée avec l'autre ouverture (20) et un moyen de fermeture mécanique pour la fermeture de l'ouverture supplémentaire.
  4. Élément de blocage (10) selon la revendication 3, dans lequel le moyen de fermeture est configuré, notamment sous la forme d'une sécurité de glissement, de sorte qu'il maintienne fermée l'ouverture supplémentaire au début de la combustion de l'ensemble pyrotechnique (12) et l'ouvre avant la fin de la combustion de l'ensemble pyrotechnique (12) et avant une expansion totale du solide expansible (14).
  5. Élément de blocage (10) selon l'une quelconque des revendications précédentes, dans lequel l'ensemble pyrotechnique (12) et le solide (14) sont comprimés l'un avec l'autre dans un comprimé, notamment séparés l'un de l'autre dans l'espace.
  6. Élément de blocage (10) selon l'une quelconque des revendications précédentes, dans lequel le solide (14) est relié avec un liant, notamment le polychloroprène.
  7. Élément de blocage (10) selon l'une quelconque des revendications précédentes, dans lequel le solide (14) comprend du graphite expansé ou un silicate, notamment le silicate de sodium.
  8. Élément de blocage (10) selon l'une quelconque des revendications précédentes, dans lequel l'ensemble pyrotechnique (12) comprend un combustible, notamment le bore, et un oxydant, notamment le trioxyde de bismuth ou le nitrate de baryum.
EP12004439.1A 2011-06-22 2012-06-13 Élément de blocage destiné à fermer un ouverture Not-in-force EP2537561B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011105304.6A DE102011105304B4 (de) 2011-06-22 2011-06-22 Sperrelement zum Verschließen einer Öffnung

Publications (3)

Publication Number Publication Date
EP2537561A2 EP2537561A2 (fr) 2012-12-26
EP2537561A3 EP2537561A3 (fr) 2014-08-27
EP2537561B1 true EP2537561B1 (fr) 2016-06-08

Family

ID=46319545

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12004439.1A Not-in-force EP2537561B1 (fr) 2011-06-22 2012-06-13 Élément de blocage destiné à fermer un ouverture

Country Status (4)

Country Link
EP (1) EP2537561B1 (fr)
DE (1) DE102011105304B4 (fr)
IL (1) IL219822A (fr)
ZA (1) ZA201204560B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3470717A1 (fr) * 2017-10-13 2019-04-17 HILTI Aktiengesellschaft Dispositif de protection contre l'incendie
EP3470718A1 (fr) * 2017-10-13 2019-04-17 HILTI Aktiengesellschaft Dispositif de protection contre l'incendie

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT392078B (de) * 1988-04-07 1991-01-25 Chemie Linz Gmbh Latexgebundene brandschutzmasse
US6324955B1 (en) * 1992-04-20 2001-12-04 Raytheon Company Explosive countermeasure device
DE19617017A1 (de) * 1996-04-27 1997-12-11 Hans Dieter Niemann Vorrichtung zum Verschließen von Wandöffnungen, Rohren o. dgl. Strömungsquerschnitten und im Brandfall expandierende Masse
DE19964021A1 (de) * 1999-12-30 2001-07-05 Friatec Ag Brandschutz-Sperrvorrichtung
DE10039720A1 (de) * 2000-08-14 2002-02-28 Hilti Ag Brandschutzmanschette
DE102008016421A1 (de) * 2008-03-31 2009-10-08 Airbus Deutschland Gmbh Vorrichtung zum aktiven Brandschutz in Flugzeugen

Also Published As

Publication number Publication date
DE102011105304A1 (de) 2012-12-27
ZA201204560B (en) 2013-02-27
EP2537561A3 (fr) 2014-08-27
EP2537561A2 (fr) 2012-12-26
IL219822A0 (en) 2012-10-31
IL219822A (en) 2016-12-29
DE102011105304B4 (de) 2017-09-28

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