EP4450133A1 - Schwimmende additivdosierung für einen wasserlöscher - Google Patents

Schwimmende additivdosierung für einen wasserlöscher Download PDF

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Publication number
EP4450133A1
EP4450133A1 EP23315493.9A EP23315493A EP4450133A1 EP 4450133 A1 EP4450133 A1 EP 4450133A1 EP 23315493 A EP23315493 A EP 23315493A EP 4450133 A1 EP4450133 A1 EP 4450133A1
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EP
European Patent Office
Prior art keywords
container
dose
floating
tank
external
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
Application number
EP23315493.9A
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English (en)
French (fr)
Other versions
EP4450133C0 (de
EP4450133B1 (de
Inventor
M. Thierry Delande
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.)
Tf France
Original Assignee
Tf France
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Publication date
Application filed by Tf France filed Critical Tf France
Priority to EP23315493.9A priority Critical patent/EP4450133B1/de
Publication of EP4450133A1 publication Critical patent/EP4450133A1/de
Application granted granted Critical
Publication of EP4450133C0 publication Critical patent/EP4450133C0/de
Publication of EP4450133B1 publication Critical patent/EP4450133B1/de
Active 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
    • 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
    • A62C5/00—Making of fire-extinguishing materials immediately before use
    • A62C5/002—Apparatus for mixing extinguishants with water

Definitions

  • the invention relates to the field of fire safety, and more particularly to the field of water extinguishers equipped with floating doses of additives.
  • water extinguishers comprise a water tank, a compressed gas cartridge housed in the tank, a spray nozzle and a control handle allowing not only to actuate the compressed gas cartridge to pressurize the water tank of the extinguisher - for example 5 to 6 bars of pressure, and generally up to 15 or 16 bars - but also to control the opening of the spray nozzle.
  • these additives have the disadvantage of being polluting and make it more difficult to recycle the extinguisher once these additives are mixed with water. Furthermore, these additives are corrosive, and putting them in direct contact with water during the storage phase of the extinguisher can cause deterioration of the walls of the extinguisher tank.
  • frangible lids are nevertheless subject to the corrosive effect of the additive, and may deteriorate over time and see their sealing properties degrade, risking causing an unexpected mixture of the additive with the water in the extinguisher tank.
  • the invention therefore aims to propose a floating dose of additive for water extinguishers which is more resistant to corrosion.
  • the invention relates to a floating dose of additive for a water extinguisher comprising a water tank and means for pressurizing said water tank, the floating dose comprising a longitudinal container having an open end provided with a circumferential external edge, and an external seal for sealing and breaking the open end secured to the circumferential external edge, which floating dose further comprises an internal seal for sealing and breaking which is arranged in the container and which is secured to an internal circumferential shoulder formed in the wall of said container.
  • the floating dose is more resistant to corrosion.
  • the additive thus occupies a fraction of the volume of the container, the remainder of the volume of the container being occupied by a compressible gas, which allows the rupture of the lids when they are subjected to a differential pressure.
  • the invention also relates to a water extinguisher comprising a water tank and means for pressurizing said tank, which extinguisher further comprises a floating dose as described above housed in the tank, the external cover closing the open end of the container of said floating dose being immersed in the water of the tank.
  • the invention relates to a floating dose of additive 1 for a water extinguisher, such additive 11 conventionally comprising fluorocarbons.
  • a extinguisher conventionally comprises a tubular-shaped reservoir with dome-shaped ends. One of the ends comprises an opening allowing the filling of the reservoir of the extinguisher with water, as well as the insertion of the floating dose of additive 1.
  • the opening of the tank is closed by a head to which is attached a pressurized gas cartridge housed in the tank, and a dip tube which extends over the height of the tank.
  • the dip tube passes through the head of the extinguisher and is extended by a liquid projection nozzle.
  • the head of the extinguisher further comprises means for releasing the gas from the cartridge into the tank, typically a striker actuated by a manual lever to pierce the gas cartridge.
  • the internal pressure increases from atmospheric pressure to a pressure greater than 4 bars, i.e. at least 5 to 6 bars and preferably of the order of 15 or 16 bars.
  • the floating dose 1 housed in the tank of the extinguisher comprises a longitudinal container 2 extending along an axis X and made of a polymer material of the high-density polyethylene type.
  • This container 2 comprises a cylindrical side wall 13, a bottom wall 14 integral with the side wall and an open end 3 opposite with a circular cross-section of radius r.
  • the floating dose 1 further comprises a longitudinal handling keel 10 extending from the bottom wall of the container 2, opposite the open end.
  • the container 2 is filled with the additive 11 and the open end 3 is sealed by sealing means 5, 8 to prevent any contact of the additive 11 in the floating dose 1 with the water in the extinguisher tank.
  • the volume of the additive 11 corresponds to a fraction of the total volume of the container 2, typically and in a non-limiting manner between 75% and 85% of the total volume of the container 2, preferably of the order of 80% of the total volume of the container 2. This volume fraction of the additive may vary depending on the type of container of the floating dose, the main thing being that there remains a fraction of the volume of the container filled with compressible gas.
  • the open end 3 of the container 2 of the floating dose 1 comprises a circumferential external edge 4 having the shape of a collar.
  • the container 2 comprises a circumferential internal shoulder 9 formed in the side wall 14 of the container 2.
  • the internal radius of the container 2 between the bottom 14 of said container 2 and the internal shoulder 9 is less than the radius r of the open end 3.
  • the surface of the internal shoulder 9 and the surface of the external edge 4 are parallel to each other and perpendicular to the longitudinal axis X of the container 2.
  • the circumferential external edge 4 is further located at a distance d from the internal shoulder 9.
  • the floating dose 1 comprises a sealed internal cover 8 housed in the container 2 and heat-sealed against the circumferential internal shoulder 9, these two covers 5, 8 forming the means for closing the open end 3 of the container 2.
  • the floating dose 1 further comprises a sealed external cover 5 heat-sealed against the circumferential external edge 4. The open end 3 of the container 2 is thus sealed in a leak-tight manner.
  • the operator manipulates the dose 1 by the keel 10 so that once in the fire extinguisher tank, the opposite end 3 of the container 2 is immersed in the water of the tank.
  • the keel 10 increases the overall length of the container 2 which prevents the floating dose 1 from turning over in the fire extinguisher tank: the open end 3, sealed in a watertight manner by the internal 8 and external 5 covers, remains under the free surface of the water contained in the fire extinguisher tank.
  • the lids 5, 8 are made - for example and in a non-limiting manner - of composite material, comprising a first coating layer of polymer material, for example with a surface density of the order of 40 g/m 2 , a metallic intermediate layer - typically an aluminum strip with a thickness of the order of 60 microns - and where appropriate an external lacquer for protecting the metallic layer with a surface density of the order of 1.5 g/m 2 .
  • the invention is obviously not limited to these materials, nor to these surface density and thickness values.
  • the coating layer is adapted to be heat sealed to the container 2 of the floating dose 1, either to the external edge 4 if it is the external lid 5, or to the internal shoulder 9 if it is the internal lid 8.
  • the metal layer of the external cover 5 is therefore intended to be in contact with the water in the extinguisher tank, while the coating layer of the internal cover 8 is intended to come into contact with the additive 11 contained in the container 2 of the floating dose 1.
  • the two inner 8 and outer 5 covers are furthermore frangible, and are designed to tear when the extinguisher tank is pressurized.
  • each of the covers 5, 8 is designed to tear as soon as the differential pressure (i.e. the pressure difference between the inside of the container 2 of the floating dose 1 and the inside of the extinguisher tank) exceeds a determined value, typically 4 bars.
  • the internal 8 and external 5 covers each deform and initially into a concavity directed towards the inside of the container 2.
  • the concavity 6 of the external cover 5 takes the form of a spherical cap of radius r (identical to the radius of the external opening 3 of the container 2), of radius of curvature R, and of height h.
  • the distance d between the circumferential external edge 4 and the circumferential internal shoulder 9 is greater than or equal to the breaking depth h r .
  • the breaking depth h r is therefore directly correlated to the radius r of the external opening 3 of the container 2, and the distance d separating the external edge 4 from the internal shoulder 9 of the container 2 therefore also depends on the radius r of the external opening 3 of the container 2.
  • the ratio between the radius r of the open end 3 and the distance d separating the external edge 4 from the internal shoulder 9 is less than or equal to 10, preferably less than or equal to 5 and still preferably of the order of 4.5.
  • the distance d separating the external edge 4 from the internal shoulder 9 is preferably of the order of 10 mm, and greater than 4.5 mm.
  • THE figures 2 And 5 represent the floating dose 1 when the extinguisher is in storage condition, that is to say that the gas cartridge has not released the gas into the tank and the pressure in the tank remains identical to the pressure in the container 2 of the floating dose 1.
  • the two internal 8 and external 5 covers are therefore in a state of equilibrium, substantially flat and parallel to each other, and sealing the open end 3 of the container 2 in a sealed manner.
  • THE figures 3 And 6 represent the floating dose 1 after the extinguisher tank is pressurized, but before the internal 8 and external 5 covers are torn.
  • the covers 5, 8 are therefore represented here in a non-equilibrium state.
  • Pressurizing the extinguisher tank creates a differential pressure between said tank and the container 2 of the floating dose 1, which has the effect of causing the deformation of the lids 5, 8 and in particular of the external lid 5 which forms a concavity 6 in the form of a spherical cap.
  • the additive 11 it is necessary for the additive 11 to occupy only a fraction of the volume of the container 2, typically of the order of 80%, the remainder of the volume of the container 2 being occupied by gas, which is compressible unlike the additive 11 which is liquid.
  • THE figures 4 And 7 represent the floating dose 1 as soon as the apex 7 of the concavity 6 formed by the deformation of the external cover 5 reaches the rupture depth h r and tears.
  • the breaking depth h r of the external cover 5 is less than or equal to the longitudinal distance d separating the external edge 4 from the internal shoulder 9 of the container 2.
  • the internal 8 and external 5 opercula are also shown in a non-equilibrium state.
  • the internal cover 8 is then completely subjected to the differential pressure and tears in turn ( figure 8 ).
  • the open end 3 of the container 2 being immersed in the water of the extinguisher tank, the water then flows into the container 2 via its open end 3 through the tears 12, 15 of the external cover 5 and the internal cover 8, and very rapid mixing of the additive 11 contained in the floating dose 1 with the water of the extinguisher.
  • the floating dose 1 according to the invention is therefore insensitive to the risk of loss of sealing under zero differential pressure, while retaining the capacity to open systematically by tearing the covers 5, 8 under sufficient differential pressure, for example greater than 4 bars.
  • the distance d between the circumferential outer edge 5 and the circumferential inner shoulder 9 may be less than the rupture depth h r of the outer cover 5.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Closures For Containers (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
EP23315493.9A 2023-12-27 2023-12-27 Schwimmende additivdosierung für einen wasserlöscher Active EP4450133B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP23315493.9A EP4450133B1 (de) 2023-12-27 2023-12-27 Schwimmende additivdosierung für einen wasserlöscher

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP23315493.9A EP4450133B1 (de) 2023-12-27 2023-12-27 Schwimmende additivdosierung für einen wasserlöscher

Publications (3)

Publication Number Publication Date
EP4450133A1 true EP4450133A1 (de) 2024-10-23
EP4450133C0 EP4450133C0 (de) 2026-01-21
EP4450133B1 EP4450133B1 (de) 2026-01-21

Family

ID=89722896

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23315493.9A Active EP4450133B1 (de) 2023-12-27 2023-12-27 Schwimmende additivdosierung für einen wasserlöscher

Country Status (1)

Country Link
EP (1) EP4450133B1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0461020A1 (de) 1990-06-05 1991-12-11 R O T Zerbrechliche Patrone für Feuerlöschzusatzstoffe in Wasserfeuerlöschern, die auf Gebrauchsmomente durch ein Gas unter Druck gesetzt werden
DE10231740B3 (de) * 2002-07-13 2004-04-08 Bundesrepublik Deutschland, vertreten durch das Bundesministerium der Verteidigung, dieses vertreten durch das Bundesamt für Wehrtechnik und Beschaffung Handfeuerlöscher
EP2666519A2 (de) * 2010-09-06 2013-11-27 Certech Asbl Feuerlöscher mit Behältern für Zusatzstoffe
FR3063651A1 (fr) * 2017-03-07 2018-09-14 Rot Flacon d'additifs pour extincteur a base d'eau

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0461020A1 (de) 1990-06-05 1991-12-11 R O T Zerbrechliche Patrone für Feuerlöschzusatzstoffe in Wasserfeuerlöschern, die auf Gebrauchsmomente durch ein Gas unter Druck gesetzt werden
DE10231740B3 (de) * 2002-07-13 2004-04-08 Bundesrepublik Deutschland, vertreten durch das Bundesministerium der Verteidigung, dieses vertreten durch das Bundesamt für Wehrtechnik und Beschaffung Handfeuerlöscher
EP2666519A2 (de) * 2010-09-06 2013-11-27 Certech Asbl Feuerlöscher mit Behältern für Zusatzstoffe
FR3063651A1 (fr) * 2017-03-07 2018-09-14 Rot Flacon d'additifs pour extincteur a base d'eau

Also Published As

Publication number Publication date
EP4450133C0 (de) 2026-01-21
EP4450133B1 (de) 2026-01-21

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