EP1268003A2 - Procede pour attenuer des explosions deja declenchees - Google Patents

Procede pour attenuer des explosions deja declenchees

Info

Publication number
EP1268003A2
EP1268003A2 EP01931390A EP01931390A EP1268003A2 EP 1268003 A2 EP1268003 A2 EP 1268003A2 EP 01931390 A EP01931390 A EP 01931390A EP 01931390 A EP01931390 A EP 01931390A EP 1268003 A2 EP1268003 A2 EP 1268003A2
Authority
EP
European Patent Office
Prior art keywords
extinguishing agent
gas
extinguishing
gas generator
suppressing
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.)
Withdrawn
Application number
EP01931390A
Other languages
German (de)
English (en)
Inventor
Joachim Sans
Steffen Schilling
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.)
Bayern Chemie Gesellschaft fuer Flugchemische Antriebe mbH
Original Assignee
Bayern Chemie Gesellschaft fuer Flugchemische Antriebe mbH
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 Bayern Chemie Gesellschaft fuer Flugchemische Antriebe mbH filed Critical Bayern Chemie Gesellschaft fuer Flugchemische Antriebe mbH
Publication of EP1268003A2 publication Critical patent/EP1268003A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C35/00—Permanently-installed equipment
    • A62C35/02—Permanently-installed equipment with containers for delivering the extinguishing substance
    • A62C35/023—Permanently-installed equipment with containers for delivering the extinguishing substance the extinguishing material being expelled by compressed gas, taken from storage tanks, or by generating a pressure gas

Definitions

  • the invention relates to a method for suppressing incipient explosions using an extinguishing device, in the housing (8) of which a pyrotechnic gas generator (1) and a container (5) of an extinguishing agent (6) closed with bursting membranes (3, 4) are provided, wherein the extinguishing agent (6) is ejected with the help of the compressed gas generated by the gas generator (1) and distributed to the side by the gas jet following at the speed of sound and is also accelerated forward.
  • extinguishing agent preferably powder
  • constant pressure containers that blow the extinguishing agent into the space to be protected if necessary via a quick opening valve.
  • a corresponding nozzle is used for uniform distribution, especially for the lateral spreading of the extinguishing agent, which usually has the shape of a slotted hemisphere or one with several holes (see company publication "HRD-Systems", June 1995, company Total Walther Feuerschutz GmbH).
  • fire extinguishing systems consist of a gas generator arranged in series, an extinguishing agent container and an outlet opening.
  • these devices are not suitable for suppressing a starting explosion.
  • the reaction In the event of an explosion, the reaction must take place in the time range of a few milliseconds in order for the explosion to occur, i.e. H. effectively combat the pressures typical of an explosion.
  • US 870,479 describes an extinguishing agent cartridge in which a central charge is triggered with the aid of freely installed ignition cords.
  • the triggering follows only by means of an open fire, a reaction to an incipient explosion is fundamentally not possible. Powder atomization is only suitable for fighting fire.
  • No. 5,305,957 proposes to equip an extinguishing device with a liquid extinguishing agent, a long, tubular acceleration section and a gas generator with a low delivery pressure of approximately 10 bar. Although a high exit velocity of the extinguishing agent is achieved, the lateral spread of the extinguishing agent jet remains low and the droplet decay only takes place at a greater distance in front of the device due to the velocity-dependent air resistance. This extinguishing device is therefore only suitable for point-specific fire fighting.
  • DE 195 44 399 C2 from the applicant describes an arrangement which is fundamentally suitable as an extinguishing device for suppressing explosions. However, there is no indication of how the extinguishing result can be optimized using the known design.
  • the object is achieved in a simple manner by the features of the extinguishing method set out in claim 1.
  • Advantageous refinements result from the features of the subclaims.
  • the extinguishing method according to the invention makes it possible, for the first time, to generate a liquid dust cloud filling this volume within less than 15 msec in a limited space, such as a storage room or a container, if the pressure increase typical for a starting explosion was detected by means of a suitable sensor.
  • the explosion is thus intercepted and suppressed well before its maximum formation. This effectively prevents major damage such as the destruction of the container or room to be protected and the fire spreading after the explosion.
  • the figure shows schematically simplified the basic structure of the extinguishing device on which the method according to the invention is based.
  • a pyrotechnic gas generator 1 which can be initiated via an ignition line 7 is provided in a housing 8 which has the shape of a tube section.
  • This gas generator enables sufficient gas generation within the short period of time required for the extinguishing process.
  • it is necessary to achieve the maximum power of the gas generator within less than 15 msec, preferably in 10 msec, at which a gas delivery rate of 1 kg / sec is achieved.
  • the burning time of the gas generator is about 30 msec. Only with the gas temperatures that occur can the required high volume flows be generated with a relatively low gas mass.
  • the gas generated by the gas generator 1 flows into a buffer volume 2, which from the housing 8, the gas generator 1 and the first bursting membrane 3 of the Extinguishing agent container 5 is enclosed.
  • the generated gas is stored in the buffer volume 2 up to a maximum pressure of 30-50 bar, preferably about 40 bar.
  • the bursting threshold of the first bursting membrane 3 is reached, which is designed in such a way that the curved central area of the membrane first buckles in the ejection direction 11 and at the same time shears the membrane over the entire circumference of its edge.
  • the second bursting membrane also shears off in the same way, so that the extinguishing agent 6 is acted upon uniformly over the entire cross section by the pressure which has arisen.
  • the entire extinguishing agent is transported as a unit via the aperture 10 of the housing 8 in the ejection direction 11. The process of atomizing the liquid extinguishing agent 6 in the free space only begins immediately after the aperture 10.
  • the lateral extent of the extinguishing agent cloud in this phase is three to four times the extent in the ejection direction 1 1.
  • the extinguishing agent cloud is then increasingly accelerated in the axial direction, which is accompanied by a significant increase in the speed of propagation in the ejection direction 1 1.
  • a permanent pressure vessel is not required. This makes the extinguisher very compact. The maintenance and testing effort is significantly reduced.
  • the assembly takes place by means of a flange 9 in an opening of the container or space to be protected. If a non-toxic gas is generated by the gas generator according to the invention and water 6 is used as the extinguishing agent, use in occupied rooms or in the storage area of food is also possible.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

L'invention concerne un procédé pour atténuer des explosions déjà déclenchées, notamment dans des contenants ou des locaux renfermant des poussières ou des gaz explosifs. Ce procédé consiste à utiliser un générateur de gaz qui produit un gaz comprimé. Ce dernier, après avoir atteint une pression maximale, expulse l'agent d'extinction, sous forme unitaire, hors de son contenant, puis le répartit latéralement et vers l'avant de manière à remplir l'espace d'un nuage de poussière extinctrice.
EP01931390A 2000-04-04 2001-03-31 Procede pour attenuer des explosions deja declenchees Withdrawn EP1268003A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10016738 2000-04-04
DE10016738A DE10016738B4 (de) 2000-04-04 2000-04-04 Verfahren zur Unterdrückung anlaufender Explosionen
PCT/DE2001/001259 WO2001074452A2 (fr) 2000-04-04 2001-03-31 Procede pour attenuer des explosions deja declenchees

Publications (1)

Publication Number Publication Date
EP1268003A2 true EP1268003A2 (fr) 2003-01-02

Family

ID=7637563

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01931390A Withdrawn EP1268003A2 (fr) 2000-04-04 2001-03-31 Procede pour attenuer des explosions deja declenchees

Country Status (7)

Country Link
US (1) US6868915B2 (fr)
EP (1) EP1268003A2 (fr)
CZ (1) CZ20022692A3 (fr)
DE (1) DE10016738B4 (fr)
HU (1) HUP0300197A2 (fr)
SK (1) SK11612002A3 (fr)
WO (1) WO2001074452A2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060086511A1 (en) * 2004-10-26 2006-04-27 Tanguay J F Automatic fire extinguisher
DE102007014908A1 (de) * 2007-03-26 2008-10-02 Rembe Gmbh Safety + Control Vorrichtung gegen die Ausbreitung von Explosionen, insbesondere Staubexplosionen
DE102008026449A1 (de) * 2008-06-03 2009-12-10 Steur, Anne Karin Vorrichtung und Verfahren zum Impuls-Ausstoß von Medium
CN101637637B (zh) * 2009-06-08 2011-12-07 陕西坚瑞消防股份有限公司 一种热气溶胶灭火装置
US8333246B2 (en) * 2010-05-25 2012-12-18 Hanratty Associates Hydro-pneumatic extinguisher
CN104147735A (zh) * 2013-05-14 2014-11-19 陕西兰德森茂消防科技有限公司 燃气发生器
CN110420427A (zh) * 2019-07-16 2019-11-08 浙江南都电源动力股份有限公司 全氟己酮自动灭火系统及其工作方法

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US870479A (en) * 1906-11-03 1907-11-05 Shirley Q Stanley Fire-extinguisher.
US2383048A (en) * 1941-08-02 1945-08-21 Jr James C Eckert Fire extinguisher
US2838122A (en) * 1954-05-13 1958-06-10 Hutchinson Harold Fire extinguishing pistols
US3897828A (en) * 1974-05-31 1975-08-05 John A Glover Method and apparatus for actuating an operating means for an automatic fire extinguishing apparatus
US4062288A (en) * 1975-03-03 1977-12-13 Allied Chemical Corporation Initiator for tire inflator
FR2565495B1 (fr) * 1984-06-08 1989-02-17 Abg Semca Extincteur a decharge rapide
HU203995B (en) * 1989-01-04 1991-11-28 Istvan Szoecs Method and apparatus for fine dispersing fluid or powder in gaseous medium advantageously air
AU2898092A (en) * 1992-09-22 1994-04-12 Zahmatov, Vladimir Dmitrievich Fire extinguishing device
US5449041A (en) * 1993-06-24 1995-09-12 Olin Corporation Apparatus and method for suppressing a fire
US5423384A (en) * 1993-06-24 1995-06-13 Olin Corporation Apparatus for suppressing a fire
US5660236A (en) * 1994-07-21 1997-08-26 Kidde Technologies, Inc. Discharging fire and explosion suppressants
DE19544399C2 (de) * 1995-11-29 1997-09-18 Bayern Chemie Gmbh Flugchemie Löschgerät zur Explosionsunterdrückung
WO1998039064A1 (fr) * 1997-03-04 1998-09-11 Nebel, Anita Dispositif explosif d'extinction d'incendie
US5992528A (en) * 1997-04-17 1999-11-30 Autoliv Asp, Inc. Inflator based fire suppression system
GB2350294B (en) * 1999-05-28 2002-10-30 Graviner Ltd Kidde Fire extinguishing and explosion suppression arrangements and methods
DE19934164C2 (de) * 1999-07-21 2003-12-24 Bayern Chemie Gmbh Flugchemie Löschgerät
DE19951886C2 (de) * 1999-10-28 2003-12-18 Bayern Chemie Gmbh Flugchemie Löschgerät

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0174452A2 *

Also Published As

Publication number Publication date
WO2001074452A2 (fr) 2001-10-11
DE10016738B4 (de) 2004-03-11
US6868915B2 (en) 2005-03-22
CZ20022692A3 (cs) 2003-04-16
SK11612002A3 (sk) 2003-06-03
US20030127234A1 (en) 2003-07-10
WO2001074452A3 (fr) 2002-03-21
DE10016738A1 (de) 2001-10-18
HUP0300197A2 (en) 2003-05-28

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