EP3337576A1 - Fire extinguisher - Google Patents
Fire extinguisherInfo
- Publication number
- EP3337576A1 EP3337576A1 EP16750600.5A EP16750600A EP3337576A1 EP 3337576 A1 EP3337576 A1 EP 3337576A1 EP 16750600 A EP16750600 A EP 16750600A EP 3337576 A1 EP3337576 A1 EP 3337576A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- extinguishing
- fire extinguisher
- chamber
- mixture
- extinguishing agent
- 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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C5/00—Making of fire-extinguishing materials immediately before use
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C13/00—Portable extinguishers which are permanently pressurised or pressurised immediately before use
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C13/00—Portable extinguishers which are permanently pressurised or pressurised immediately before use
- A62C13/76—Details or accessories
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
- A62C31/12—Nozzles specially adapted for fire-extinguishing for delivering foam or atomised foam
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C5/00—Making of fire-extinguishing materials immediately before use
- A62C5/002—Apparatus for mixing extinguishants with water
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C5/00—Making of fire-extinguishing materials immediately before use
- A62C5/02—Making of fire-extinguishing materials immediately before use of foam
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C5/00—Making of fire-extinguishing materials immediately before use
- A62C5/02—Making of fire-extinguishing materials immediately before use of foam
- A62C5/022—Making of fire-extinguishing materials immediately before use of foam with air or gas present as such
-
- 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
Definitions
- the invention relates to a fire extinguisher according to the preamble of claim 1.
- He has an extinguishing agent container, from which the extinguishing mixture is passed as a mixture of an extinguishing agent and additional liquids in an outlet channel when using the fire extinguisher, and a mixing device in which the extinguishing mixture is mixed with air and foamed.
- Such a fire extinguisher according to the preamble of claim 1 is as
- the additional liquids - referred to in this application as a foaming agent (foaming agent) - are stored in secondary containers and also that the secondary containers are arranged in the extinguishing agent container.
- the extinguishing agent container is filled with the extinguishing agent, e.g. Water filled with some additives.
- the foaming agents are added to the extinguishing agent for foaming only in case of fire.
- the auxiliary tank when using the fire extinguishing system via a
- Inlet valve directly or via the extinguishing agent container with a pressurized gas source-e.g. a print cartridge that is filled with CO2, connected and pressurized.
- a valve device opens on the secondary container and the foaming agent pours into the extinguishing agent container and mixes with the extinguishing agent, e.g. Water.
- the extinguishing agent container is pressurized.
- the extinguishing mixture is ejected as extinguishing foam.
- Pressurization of the extinguishing agent container is driven as a ready mixed extinguishing mixture in the extinguishing mixture channel.
- Extinguishing agent container and secondary containers or the extinguishing agent container expelled and sprayed as extinguishing foam on the fire site.
- the compressed gas is referred to in this application as a propellant.
- foam-forming surfactants for example
- Fluorine surfactants are particularly harmful and should not get into the sewage or groundwater. However, they have been indispensable so far to achieve a good extinguishing performance that meets the requirements.
- Extinguishing foam should have a certain coherence and stability, so that the fire is stifled and can not be "burned" by the applied foam carpet, one tries to improve the foaming, this is mainly the interposition of air.
- the secondary container which is arranged on the extinguishing hose, is designed as an injector in the manner of a Venturi nozzle
- Extinguishing agent foaming agent and air generated in the flow channel. This is applied as extinguishing foam on the fire site. This works; However, the properties of the foam, in particular throw, volume and stability are not satisfactory, if the use of surfactants should be completely dispensed with.
- Extinguishing foam preparation in which project from the scope of the mixing device from several supply channels into the interior of the mixing chamber. As a result, a plurality of jets of a compressed gas are blown into the inner region of the extinguishing mixture stream.
- the distribution of air over the cross section of the extinguishing mixture is limited by the number of supply channels, so that the foaming is insufficient.
- This blending device for producing compressed air foam requires the presence of a compressed air source, in particular a pressure bottle, which is filled with air or another suitable high pressure gas of e.g. 100bar is loaded.
- the object of the invention is, without the use of surfactants and in particular fluorine as well as without the use of a pressure of more than 50bar gas to increase the foaming and in particular to ensure that with sufficient throw a thick impenetrable foam carpet on the
- Fire site e.g. let the surface of a burning liquid lay.
- extinguishing agent and the foaming agent can be stored in the extinguishing agent container of the fire extinguisher as a finished extinguishing mixture or else separately from each other, in particular claim 5.
- the mixing chamber which is set to the outlet opening of the extinguishing mixture channel, serves - especially in the development according to claim 8 - the production of a plurality of individual streamlines, which are interrupted and relocated again and again in the flow direction.
- the result is a kind of turbulent flow of the extinguishing mixture with an unlimited number of spaces between the current filaments and interruptions of the current filaments in the current direction with the finest distribution in
- the ventilation chamber at the mouth of the mixing chamber can be particularly effective in the mixing of ambient air in the form of finely divided
- the air holes in the jacket of the ventilation chamber may be formed as cylindrical holes or as a circulating in the ventilation plane narrow slot.
- Flow rate of the expelled by the expanding propellant gas extinguishing mixture (extinguishing mixture) increased by the flow path is narrowed below the ventilation level of the ventilation chamber, in particular by a collar (claim 2).
- the extinguishing mixture tends by its cohesion, even on a short
- Claim 3 prevented.
- the foam formation according to the invention is supplemented and reinforced by a further measure according to claim 4. It serves to further increase the volume of the now already foamed extinguishing mixture by their further mechanical
- Loosening which in turn is associated with an increase in the exit velocity.
- a wire mesh with intersecting metal or plastic wires is placed in the radial plane of the mouth of the ventilation chamber.
- the division of the extinguishing mixture of extinguishing agent and foaming agent is increased such that from the individual jets finally a turbulent flow of this extinguishing mixture and an additional mixing is formed.
- the housing inner cross-section of the mixing chamber in several radial planes through hole plate en (32, 33) is filled, the
- 1 is a longitudinal section through a fire extinguisher (without extinguishing valve)
- FIG. 2, 3 and 4 detail views of the exhaust valve with attached ventilation chamber
- FIG. 1 shows a fire extinguisher with a fire extinguisher with the extinguishing agent container 1.
- This pressure-resistant container 1 of the hand-held fire extinguisher has a circular-cylindrical open neck 2. In this neck fits the collar 4 of a closure head 3, which is pressure-resistant manner by means of a clip, not shown, on the container 1.
- the closure head 3 has a hose nozzle 5 for attaching the extinguishing hose 15 with the attached metering valve in this application throughout as
- Extinguishing valve 10 referred to.
- the hose connection is via outlet 6 and
- riser 7 connected to the interior of the container.
- the riser 7 extends substantially to the bottom of the container, so that the container can be completely emptied.
- the container 1 is filled with the extinguishing agent, e.g. Filled with water. He is pressurized by a print cartridge 8, in which a pressure fluid / propellant is stored.
- the print cartridge 8 is mounted in the mouth of a pressure channel 9 on the closure head such that it protrudes into the container with the closure head.
- a valve plate which closes the print cartridge 8, destroyed by means of a percussion plunger 11.
- the percussion ram is guided in alignment with the central axis of the print cartridge 8 and to the also aligned rising branch 13 of the pressure channel sliding and sealing at the same time in the closure head.
- the pressure channel 12 is guided in the closure head U-shaped. On his free
- Mouth is a pressure tube 9 is set, which with the filling opening 19 of the
- Sub-tank 14 via an inlet valve -not shown- is connected pressure-resistant.
- the inlet valve is a check valve which is opened by spring pressure in its closed position and by pressurizing the pressure tube 9 (or the inner extinguishing agent container).
- valve device 23 On its other outlet side 22 of the secondary tank 14 is closed by a valve device 23, here a predetermined breaking point, down.
- the predetermined breaking point is created by a weakening of the jacket, which propagates in particular on a generatrix. At internal pressure of the sub-tank 14, the sub-tank opens to the outside here.
- the secondary container 14 has on its back along a common generatrix a recess and forms on its circumference a constriction 20.
- Sub-tank 14 nestles with the indentation to the riser 7 and is fastened in the region of these constrictions by means of a cable tie 20 to the riser 7.
- the predetermined breaking point of the secondary container 14 is now designed so that it opens under the now emerging pressure. As a result, the liquid -that is
- the secondary container contains the foaming agent.
- Fluorinated surfactants which greatly reduce the surface tension of the water and on the one hand have excellent foaming properties and have a good extinguishing effect, but on the other hand damage the water, especially the groundwater, during extinguishment, were used for this purpose. Preference is therefore given to the use of fluorine-free foaming, but their foaming and extinguishing effect is worse, if they are not optimized by the mixing device according to the invention.
- the foaming agent can also be added to the extinguishing agent immediately and as a finished mixture in the
- Extinguishing agent containers are filled.
- This alternative is particularly suitable for permanent pressure extinguishers on, in which the extinguishing agent container is placed after filling with the extinguishing mixture by filling with a suitable pressure medium / propellant gas under continuous pressure.
- This alternative is also suitable for Aufladelöscher, in which the pressure means / propellant gas-as also described above- in a
- the mixture of the extinguishing agent and the foaming agent is in any case when the extinguishing agent container is pressurized
- Extinguishing mixture to be sprayed on the fire site.
- a further treatment of the extinguishing mixture of extinguishing agent and foaming agent is carried out to improve foaming. It must be remembered that the extinguishing mixture forms a laminar flow substantially. It is therefore pre-empted a mixing device, which consists of the mixing chamber 18 and the ventilation chamber 21 placed thereon. The extinguishing mixture leaves this mixer as a foam.
- the foam still has a substantially worse extinguishing effect than when using fluorine-containing surfactants as foaming agents, when the extinguishing mixture stream is divided into individual streams in the mixing chamber and discharged in this form.
- the resulting foam dissolves over the burn site, e.g. burning liquid surface - thus has a lack of stability - and is not sufficient with its thickness to choke the flame - so has too little volume per unit weight-.
- 100bar processed foam is achieved or exceeded.
- Soaking up of the fire site by the firmer and thicker foam carpet is so good that the distribution of air bubbles in fine distribution is not detrimental.
- This jacket is firmly clipped to the outlet of the mixing chamber 18 by axially projecting hook 25, which has an outer collar on the circular cylindrical
- the shell is provided on its circumference in a cross-sectional plane (ventilation level) with air holes 26.
- the inner cross-section of the jacket of the ventilation chamber is below -d.h .: so narrowed upstream of the ventilation level that this
- Flow velocity in the area of the air holes creates a vacuum of less than atmospheric pressure which leads to the intake of the ambient air.
- this constriction is designed as a circumferential collar 27, which has the effect of increasing the flow rate while reducing the static pressure in the extinguishing mixture stream.
- the resulting negative pressure pulls the
- a further increase in volume is achieved by the wire mesh 29, which is placed on the orifice 30 of the circular cylindrical housing of the ventilation chamber 21 and clamped by means of screw ring 31 on a small circumferential on the inner circumference of the shell collar.
- the wire mesh 29 consists of thin, less than 1 mm thick wires of metal or plastic, which are laid with a density between 15 and 40 meshes, preferably 20 to 35 meshes per square inch to a rectangular grid.
- the cross section of the ventilation chamber 21 is between 20 and 50qmm, e.g. 35qmm.
- This wire mesh 29 has the function, the exiting with air bubbles
- Enriched foam jet to further mix and loosen up. It works but above all as a cross-sectional constriction and caused with the simultaneous increase in volume of the foam and an increase in the exit velocity and thus the throw of the foam.
- a mesh 29 filling the jacket cross-section preferably a wire mesh, occurs as a constriction.
- the wire mesh 29 consists of thin, less than 1 mm thick wires of metal or plastic, which are laid with a density between 15 and 40 meshes, preferably 20 to 35 meshes per square inch to a rectangular grid.
- the cross section of the ventilation chamber 21 is between 20 and 50qmm, e.g. 35qmm.
- This grid corresponds in its design to the grating 28. However, it has at this point the function to divide the emerging from the mixing chamber 18 foam jet, to swirl and increase in volume. This increase in volume leads, in addition to the above-described effect of the cross-sectional constriction, to a further increase in the flow velocity and the resulting flow
- Ventilation chamber 21 connected such that the front edge of the mixing chamber 18 and the opposite rear edge of the ventilation chamber 21 this circumferential gap 26 release.
- Ventilation chamber 21 is a cap sleeve 34 by thread pairing 35th
- the cap sleeve 34 extends beyond a cylindrical in the axial direction
- Extension 36 which has the mixing chamber 18 at its front free end and which forms the front edge of the mixing chamber 18.
- the cap sleeve 34 has at its free end the circumferential hook 25, which engages behind the outer diameter stage of the cylindrical extension 36.
- Diameter stage of the cylindrical extension 36 is a thread into which a clamping sleeve 37 with its external thread can be screwed.
- the Clamping sleeve 37 clamps by screwing to the stop the wire mesh 29 against the radial surface of the diameter step of the cylindrical extension 36th
- Outer periphery of the extension 36 is a cylindrical gap which connects the slot 26 with the atmosphere.
- the mixing chamber 18 has in all the described embodiments essentially the function to break the laminar flow of the extinguishing mixture into individual jets to divert these individual jets from the flow direction and to break it up into smaller pieces, drops, strands.
- the cylindrical housing of the mixing chamber 18 is set on the one hand to the outlet of the extinguishing valve 10 and on the other hand by the own outlet with the
- Ventilation chamber 21 as previously described- connected.
- Housing inner cross-section is filled in several radial planes by perforated plates 32, 33 which lie in the flow behind each other.
- the holes may be distributed differently, e.g. in several directions, e.g. in several
- the holes of the second orifice plate may and preferably have a direction different from the axial direction, and are preferably inclined with respect to the axial direction in the circumferential direction inclined, in the second orifice plate preferably different and
- the holes of the perforated plate 32 are directed in the flow direction and distributed uniformly over the surface of the perforated plate. Perforated plates 32 divides the incoming
- the holes of the downstream following perforated plate 33 are directed in the direction of flow and in addition also more or less transverse to it and evenly distributed over the surface of the perforated plate 33, but less than the number of holes.
- Perforated plate 32 Perforated plate 33 divides the incoming single rays on further, directs them and split them into shorter pieces. Perforated plate 33 thus serves to give these individual jets a direction conducive to swirling and mixing and to chop them up.
- a foam carpet is produced without the use of fluorine-containing surfactants, which lays on the fire, especially on burning liquid levels, and is so firm that at a few centimeters thickness of the foam layer, the flames are permanently stifled.
- Propellant gas off It is therefore necessary to have a sufficiently large volume of propellant gas-related to the volume of the extinguishing mixture or the
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)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015009329 | 2015-07-22 | ||
DE102016000079 | 2016-01-07 | ||
PCT/DE2016/000261 WO2017012601A1 (en) | 2015-07-22 | 2016-06-30 | Fire extinguisher |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3337576A1 true EP3337576A1 (en) | 2018-06-27 |
EP3337576B1 EP3337576B1 (en) | 2019-11-20 |
Family
ID=56683699
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16750600.5A Active EP3337576B1 (en) | 2015-07-22 | 2016-06-30 | Fire extinguisher |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3337576B1 (en) |
DE (1) | DE112016003293A5 (en) |
WO (1) | WO2017012601A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3862055A1 (en) | 2020-02-10 | 2021-08-11 | Uniteq S.A. | Fire extinguishing nozzle and fire extinguisher |
BE1028003A1 (en) | 2020-02-10 | 2021-08-17 | Uniteq S A | FIRE EXTINGUISHING NOZZLE AND EXTINGUISHER |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018208295A1 (en) * | 2018-05-25 | 2019-11-28 | Fabrik chemischer Präparate von Dr. Richard Sthamer GmbH & Co. KG | Foam tube adapter |
US11364399B2 (en) | 2018-07-19 | 2022-06-21 | Minimax Viking Research & Development Gmbh | Fire suppression nozzle, nozzle assembly, and method for C6-based solution |
WO2020112629A1 (en) * | 2018-11-26 | 2020-06-04 | Minimax Viking Research & Development Gmbh | Fire suppression nozzle, nozzle assembly, system, and method for fluorine free solution |
US11833379B2 (en) | 2021-09-16 | 2023-12-05 | Minimax Viking Research & Development Gmbh | Fire protection floor nozzle, systems, and methods for floor nozzle spray systems |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB806920A (en) * | 1955-09-19 | 1959-01-07 | Pyrene Co Ltd | Improvements relating to foam generators |
US4478516A (en) * | 1982-09-30 | 1984-10-23 | Milton Kessler | Apparatus for mixing and blending constituents of a flow of thermoplastics material |
US4830790A (en) * | 1987-11-04 | 1989-05-16 | Co-Son Industries | Foam generating nozzle |
CA1266073A (en) * | 1988-12-14 | 1990-02-20 | Douglas E. Stevenson | Foam generating nozzle |
US5054688A (en) * | 1989-12-20 | 1991-10-08 | Robwen, Inc. | Foam producing nozzle |
DE4224891A1 (en) | 1991-09-16 | 1993-03-18 | Doeka Feuerloeschgeraete | Hand-held fire extinguisher - has internal container in which fire extinguishing foam is produced |
US5255747A (en) | 1992-10-01 | 1993-10-26 | Hale Fire Pump Company | Compressed air foam system |
US5613773A (en) * | 1993-05-04 | 1997-03-25 | Scott Plastics Ltd. | Apparatus and method for generating foam from pressurized liquid |
US5881817A (en) | 1997-07-18 | 1999-03-16 | Mahrt; David M. | Cold compressed air foam fire control apparatus |
DE10010141C1 (en) | 2000-03-03 | 2001-10-04 | Ulrich Braun | Mixing chamber for producing compressed air foam for fire extinguishing devices has internal contour narrowing preferably conical towards compressed air foam outlet for better foam production |
DE202005010596U1 (en) | 2005-07-04 | 2005-09-22 | Feuerschutz Jockel Gmbh & Co. Kg | Handheld fire extinguisher for spraying aqueous solution onto fire has handle with lever on top of tank filled with fluid, flexible hose and nozzle with mixing valve |
CN201271444Y (en) * | 2008-10-07 | 2009-07-15 | 兴化锁龙消防药剂有限公司 | A-type fire foam-producing machine |
WO2011085208A2 (en) * | 2010-01-07 | 2011-07-14 | Elkhart Brass Manufacturing Company, Inc. | Foam nozzle expansion tube |
BE1019473A3 (en) | 2010-09-06 | 2012-07-03 | Certech Asbl | EXTINGUISHER WITH TANKS FOR ADDITIVES. |
DE202011052455U1 (en) | 2011-12-23 | 2012-02-01 | Markus Gallersdörfer | Mixing chamber for the production of compressed air foam for extinguishing systems |
DE202013009111U1 (en) | 2013-10-12 | 2013-11-28 | Mtk Metalltechnik Krapf Gmbh | Mixing chamber for extinguishing foam preparation |
CN103541757B (en) * | 2013-10-18 | 2016-03-23 | 中国矿业大学 | A kind of mining fire extinguishing foam producer |
-
2016
- 2016-06-30 EP EP16750600.5A patent/EP3337576B1/en active Active
- 2016-06-30 WO PCT/DE2016/000261 patent/WO2017012601A1/en active Application Filing
- 2016-06-30 DE DE112016003293.5T patent/DE112016003293A5/en not_active Withdrawn
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3862055A1 (en) | 2020-02-10 | 2021-08-11 | Uniteq S.A. | Fire extinguishing nozzle and fire extinguisher |
BE1028003A1 (en) | 2020-02-10 | 2021-08-17 | Uniteq S A | FIRE EXTINGUISHING NOZZLE AND EXTINGUISHER |
BE1028042A1 (en) | 2020-02-10 | 2021-09-01 | Uniteq S A | FIRE EXTINGUISHING NOZZLE AND EXTINGUISHER |
EP4186568A1 (en) | 2020-02-10 | 2023-05-31 | Uniteq S.A. | Fire extinguishing nozzle and fire extinguisher |
Also Published As
Publication number | Publication date |
---|---|
WO2017012601A1 (en) | 2017-01-26 |
EP3337576B1 (en) | 2019-11-20 |
DE112016003293A5 (en) | 2018-04-26 |
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