EP0141563B1 - Puderfeuerlöscher - Google Patents

Puderfeuerlöscher Download PDF

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Publication number
EP0141563B1
EP0141563B1 EP84307029A EP84307029A EP0141563B1 EP 0141563 B1 EP0141563 B1 EP 0141563B1 EP 84307029 A EP84307029 A EP 84307029A EP 84307029 A EP84307029 A EP 84307029A EP 0141563 B1 EP0141563 B1 EP 0141563B1
Authority
EP
European Patent Office
Prior art keywords
valve
powder
chamber
pressure
fire extinguisher
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
Application number
EP84307029A
Other languages
English (en)
French (fr)
Other versions
EP0141563A3 (en
EP0141563A2 (de
Inventor
Roger Carr
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT84307029T priority Critical patent/ATE34924T1/de
Publication of EP0141563A2 publication Critical patent/EP0141563A2/de
Publication of EP0141563A3 publication Critical patent/EP0141563A3/en
Application granted granted Critical
Publication of EP0141563B1 publication Critical patent/EP0141563B1/de
Expired legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C13/00—Portable extinguishers which are permanently pressurised or pressurised immediately before use
    • A62C13/66—Portable extinguishers which are permanently pressurised or pressurised immediately before use with extinguishing material and pressure gas being stored in separate containers
    • A62C13/68—Portable extinguishers which are permanently pressurised or pressurised immediately before use with extinguishing material and pressure gas being stored in separate containers characterised by means for releasing the extinguishing material
    • 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

Definitions

  • This invention relates to a powder type fire extinguisher.
  • a powder contained in a chamber in the extinguisher is driven out of the chamber by compressed gas when a container holding the gas is opened.
  • compressed gas it is necessary to ensure that the compressed gas does not escape directly through the outlet without entraining the powder, and thus that the powder is fully fluidized inside the chamber before any output from the chamber occurs.
  • DE-A-1434959 there is disclosed such a fire extinguisher, in which the valve controlling the compressed gas escape is activated by a manual lever operable in two stages. Since the second stage is also under manual control, it cannot be ensured that the powder has been sufficiently fluidized before any output commences.
  • a fire extinguisher for discharging powder having a chamber for holding the powder, a container for compressed gas, a powder outlet from the chamber and means for opening the gas container to allow compressed gas to enter the chamber and drive the powder out of the outlet, wherein a valve is provided in the outlet, the valve having a valve member movable onto and off a seat in a valve housing to close or open the outlet, characterised in that the valve member is movable by pressure on opposed faces of the member, that the area of the valve member face exposed to pressure from the chamber is greater than the area of the other face, and in that a passage is provided from the gas container to the valve housing to allow compressed gas to act on said other face of the valve member directly the container is opened.
  • valve is held closed while the compressed gas brings the powder into a fluidized state and while the pressure in the chamber builds up.
  • the pressure in the chamber is equal to the pressure acting on said other face of the valve member, the difference in areas of the valve member faces exposed to pressure will cause the valve to open fully to allow the fluidized powder to pass out.
  • the extinguisher has a head fitting which includes an outlet passage and which supports a cylinder containing the compressed gas and a mechanism for puncturing the cylinder to allow the gas to escape into the chamber and which also contains passages for directing the escaping gas through a tube to the bottom of the mass of powder in the chamber and to said other face of the valve member.
  • the valve is preferably mounted in the outlet passage in the head fitting.
  • the valve may be a poppet valve and said other face may be formed by the end of the valve stem.
  • the valve stem may be arranged above the head and the head itself may be acted upon by the pressure in the chamber.
  • the valve head may present a rounded face to the chamber, to offer minimal resistance to the flow of powder when the valve is open.
  • the outlet passage may be continued upstream of the valve, into the chamber, by an elongate tube.
  • the invention also provides a method of controlling the output from a fire extinguisher for discharging powder, characterised in that a valve is placed in the powder outlet from the extinguisher, and, on opening of a source of compressed gas to expel the powder, the gas is introduced to a space where it exerts a force on the valve to hold the valve closed while the pressure in the powder chamber builds up to a level at which satisfactory output can take place, and when this level has been reached, the pressure in the chamber exerts a force on the valve which opens the valve to allow the powder to be expelled.
  • the head fitting 10 shown in Figure 1 is for fitting into the neck of a cylindrical powder container in a conventional manner.
  • the container itself is not shown, and can be conventional. Any suitable method of fastening the fitting into the container neck can be used.
  • a flange 12 limits the insertion of the fitting into the container neck.
  • the fitting has a socket 14 for receiving a cylinder of compressed gas.
  • a conventional firing mechanism (not shown) will be provided on the outside of the fitting to allow the cylinder to be punctured when the extinguisher is to be used.
  • An outlet passage 16 extends through the fitting.
  • a conventional 'nozzle to direct the flow can be attached to the outer end 18 of the passage.
  • valve shown in Figures 3 and 4 fits into the lower end 20 of the passage.
  • the socket 14 for the cylinder and the lower end of the outlet passage can be seen. Also visible is a socket 22 for a tube (not shown) which extends from the head fitting to near the bottom of the chamber.
  • a passage 24 for compressed gas leads from the socket 14 to the socket 22, and another passage 26 leads from socket 22 to the lower end 20 of the outlet passage 16.
  • the valve shown in Figures 3 and 4 has a housing 30 with a valve seat 31 and a valve member 32 movable in the housing.
  • the valve member has a head 34 and a stem 36 and the stem is guided in a bore 38 in the housing.
  • the top of the housing 30 is a tight fit in the lower end 20 of the outlet passage, and a key portion 40 fits in a keyway 42 in the head fitting.
  • the engagement between the key 40 and the keyway 42 ensures that the passage 26 lines up with a passage 44 in the valve housing, so that gas pressure can pass from the cylinder socket 14 to the bore 38 in which the valve stem 36 slides.
  • 0-ring seals 46 and 48 respectively seal the valve housing in the outlet passage 16 and the valve stem 36 in the bore 38.
  • puncturing of the compressed gas cylinder by the firing mechanism causes gas to be forced through passages 24 and 26, typically at a pressure of 50-75 daN/cm 2 (750-1000 psi). Gas passes down a tube fitted in socket 22 to fluidise the powder and to build up the pressure inside the chamber. Gas also passes into passage 44 to act on the top of the valve stem 36. As a result, the valve member 32 is forced downwards against the seat 31 to close the valve. The pressure acting on the lower side of the valve head 34 is gradually building up as the powder is becoming fully fluidized, but initially is substantially lower than the pressure above the valve.
  • the pressure on the bottom of the valve will become equal to that above. Since the area of the valve head presented to pressure from below is greater than the area of the stem presented to pressure from above there will be a net opening force acting on the valve member, and the valve will open to allow the fluidized powder to flow through the pipe 50 and out. This stage is typically reached about 2 seconds after operation of the firing mechanism.
  • Figure 4 shows that the cross-sectional area occupied by the part of the housing containing the bore 18 is kept small, so as not to unduly reduce the cross-sectional area of the outlet passage in this region.

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)
  • Fire-Extinguishing Compositions (AREA)

Claims (9)

1. Ein Feuerlöscher zur Abgabe von Pulver mit einer Kammer zu dessen Aufnahme, einem Behälter für Druckgas, einem Pulverauslaß aus der Kammer und mit Mitteln zum Öffnen des Gasbehälters zum Ermöglichen eines Eintritts des Druckgases in die Kammer und zum Austreiben des Pulvers aus dem Auslaß, wobei ein Ventil in dem Auslaß (16) vorgesehen ist, das Ventil zum Schließen oder Öffnen des Auslasses ein auf einen Sitz (31) in einem Ventilgehäuse (30) zu-und von diesem wegbewegbares Ventilglied (32) aufweist, dadurch gekennzeichnet, daß das Ventilglied (32) durch Druck auf seinen beiden Seiten verschiebbar ist, daß die Fläche der dem Druck aus der Kammer ausgesetzten Ventilgliedseite (34) größer als die Fläche der anderen Seite (36) ist und daß ein Kanal (44) vom Gasbehälter zum Ventilgehäuse (30) vorgesehen ist, damit das Druckgas unmittelbar bei Öffnen des Behälters auf die andere Seite (36) des Ventilgliedes (32) einwirken kann.
2. Ein Feuerlöscher nach Anspruch 1, gekennzeichnet durch eine Kopfarmatur (10), die einen Auslaßkanal (16) enthält, wobei die Kopfarmatur . einen das Druckgas enthaltenden Zylinder und einen Mechanismus zum Punktieren des Zylinders enthält, damit das Gas in die Kammer entweichen kann, und auch Kanäle (24, 26) enthält, um das entweichende Gas durch ein Rohr (22) auf den Boden der Masse des Pulvers in der Kammer und auf die andere Seite (36) des Ventilgliedes (32) zu richten.
3. Ein Feuerlöscher nach Anspruch 2, dadurch gekennzeichnet, daß das Ventil (32) in dem Auslaßkanal (16) in der Kopfarmatur angeordnet ist.
4. Ein Feuerlöscher nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Ventil (32) ein Tellerventil (34) ist und die. andere Seite durch das Ende eines Ventilstößels (36) des Ventiles gebildet ist.
5. Ein Feuerlöscher nach Anspruch 4, dadurch gekennzeichnet, daß der Ventilstößel (36) oberhalb eines Ventilkopfes (34) angeordnet ist und der Kopf selbst im Betrieb unter der Einwirkung des Druckes in der Kammer steht.
6. Ein Feuerlöscher nach Anspruch 5, dadurch gekennzeichnet, daß der Ventilkopf (34) zum Erreichen eines minimalen Widerstandes gegenüber dem Strom des Pulvers bei offenem Ventil (32) gegenüber der Kammer eine abgerundete Fläche darstellt.
7. Ein Feuerlöscher nach irgendeinem der Ansprüche 2 bis 6, dadurch gekennzeichnet, daß sich der Auslaßkanal (16) über ein langgestrecktes Rohr (50) strömungsoberhalb des Ventiles (32) in die Kammer fortsetzt.
8. Ein Verfahren zum Steuern des Auslasses eines Feuerlöschers zum Abgeben von Pulver, dadurch gekennzeichnet, daß ein Ventil (32) im Pulverauslaß des Löschers angeordnet ist und bei Öffnen einer Druckgasquelle zum Austreiben des Pulvers das Gas in einen Raum (38, 44) eingeführt wird, wo es einen Druck auf das Ventil zu dessen Halten in Schließstellung ausübt, während sich der Druck in der Pulverkammer bis auf eine höhe aufbaut, auf der eine zufriedenstellende Abgabe stattfinden kann, und der Druck in der Kammer bei Erreichen dieser Höhe eine Kraft auf das Ventil (32) ausübt, die dieses zum Ermöglichen eines Austreibens des Pulvers öffnet.
9. Ein Verfahren zum Steuern des Auslasses eines Feuerlöschers zum Abgeben von Pulver, dadurch gekennzeichnet, daß ein Ventil in dem Pulverauslaß (16) mit einem Ventilglied (32) vorgesehen ist, das zum Öffnen oder Schließen des Auslasses durch Druck auf beide Seiten auf einen Sitz (31) in einem Ventilgehäuse (30) zu und von diesem weg bewegbar ist, die dem Druck aus der Kammer ausgesetzte Fläche der Ventilgliedseite (34) größer als die Fläche der anderen Seite (36) ist und das Verfahren weiter die Einwirkung des Druckgases auf die andere Seite (36) des Ventilgliedes (32) unmittelbar bei Öffnen des Behälters einschließt, um das Ventil, während sich der Druck in der Pulverkammer bis auf eine zufriedenstellende Höhe aufbaut, geschlossen zu halten.
EP84307029A 1983-10-21 1984-10-15 Puderfeuerlöscher Expired EP0141563B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84307029T ATE34924T1 (de) 1983-10-21 1984-10-15 Puderfeuerloescher.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB08328213A GB2148114B (en) 1983-10-21 1983-10-21 Powder type fire extinguisher
GB8328213 1983-10-21

Publications (3)

Publication Number Publication Date
EP0141563A2 EP0141563A2 (de) 1985-05-15
EP0141563A3 EP0141563A3 (en) 1986-01-29
EP0141563B1 true EP0141563B1 (de) 1988-06-08

Family

ID=10550557

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84307029A Expired EP0141563B1 (de) 1983-10-21 1984-10-15 Puderfeuerlöscher

Country Status (5)

Country Link
EP (1) EP0141563B1 (de)
AT (1) ATE34924T1 (de)
DE (1) DE3471887D1 (de)
ES (1) ES8601708A1 (de)
GB (1) GB2148114B (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2734163B1 (fr) * 1995-05-15 1997-08-01 Sicli Dispositif de securite anti haute-pression pour extincteur d'incendie
DE29602248U1 (de) * 1996-02-09 1996-04-11 Hofer, Daniel, 78056 Villingen-Schwenningen Druckhebel-Ventil für Dauerdruck-Feuerlöscher
GB2408684B (en) * 2003-12-06 2005-11-09 Roger Carr Improved powder extinguisher discharge valve
GB0712527D0 (en) * 2007-06-28 2007-08-08 Carr Roger Discharge valve for powder-type fire extinguisher

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1434959A1 (de) * 1963-10-07 1968-12-05 Schmoele Metall R & G Armaturen fuer Loeschgeraete,insbesondere Trockenloescher
JPS4952499A (de) * 1972-09-25 1974-05-21
US3937257A (en) * 1974-12-13 1976-02-10 Biro Fils Method and apparatus for pressurizing reservoirs of fire-fighting equipment
GB1567895A (en) * 1978-04-26 1980-05-21 Glover & Co Ltd T Operating head for a fire extinguisher

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Chambers, dictionary of sciences pages 918, 919 *

Also Published As

Publication number Publication date
EP0141563A3 (en) 1986-01-29
ATE34924T1 (de) 1988-06-15
EP0141563A2 (de) 1985-05-15
GB2148114A (en) 1985-05-30
GB2148114B (en) 1987-05-20
ES536928A0 (es) 1985-11-16
GB8328213D0 (en) 1983-11-23
ES8601708A1 (es) 1985-11-16
DE3471887D1 (en) 1988-07-14

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