EP3302719B1 - Dispositif et procédé pour produire une mousse extinctrice - Google Patents

Dispositif et procédé pour produire une mousse extinctrice Download PDF

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Publication number
EP3302719B1
EP3302719B1 EP16731026.7A EP16731026A EP3302719B1 EP 3302719 B1 EP3302719 B1 EP 3302719B1 EP 16731026 A EP16731026 A EP 16731026A EP 3302719 B1 EP3302719 B1 EP 3302719B1
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EP
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Prior art keywords
water
venturi element
gas
foaming agent
arrangement
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EP16731026.7A
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German (de)
English (en)
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EP3302719A1 (fr
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Gerd GÖBEL
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    • 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

Definitions

  • the present invention relates to an arrangement for producing an extinguishing foam according to the preamble of patent claim 1 and also relates to a method for producing an extinguishing foam using an arrangement according to the invention for producing an extinguishing foam.
  • Such arrangements are used in masses for extinguishing foam generation in stationary or mobile fire extinguishing equipment, which serve to deploy an extinguishing foam, for example, to extinguish a fire through the extinguishing foam or to protect adjacent objects by covering with extinguishing foam from attacking the flames.
  • a foam against water is the means of choice due to its diverse, asphyxiant as well as cooling extinguishing effects.
  • the known systems for producing the extinguishing foam is in this case in common that a foaming agent supplied under pressure extinguishing water is added before the foaming agent-water mixture is foamed by means of air to the extinguishing foam, see for example US 5 113 945 A ,
  • the admixers for the foaming agent can be distinguished according to the principle of the admixture in pressure mixers and - the interest here - Zumischer that work on the Venturi principle.
  • admixture takes place either as an injector ("water jet pumps”) according to the suction jet or jet pump principle or as a pipe with cross-sectional tapering (“venturi tubes”) and intake pipe in the area of the cross-sectional taper.
  • injector water jet pumps
  • venturi tubes pipe with cross-sectional tapering
  • intake pipe in the area of the cross-sectional taper.
  • Both constructions have the effect that increasing the flow velocity in a restricted pipe (nozzle) creates a pressure drop and this in turn leads to a suction or suction effect in this area (venturi effect).
  • the term "venturi elements” is generally referred to below, the term “admixer” should be understood as meaning any constructive design which uses the above-described venturi effect for admixture.
  • the dynamic pressure (dynamic pressure) in the region of the cross-sectional taper is maximal and the static pressure minimal. Due to the constant volume flow, the velocity of the flowing extinguishing water increases in proportion to the cross sections when flowing through the cross-sectional taper. At the same time, the pressure in the intake pipe opening at the cross-sectional taper decreases. This creates a differential pressure which causes suction of the liquid foaming agent through the intake pipe, which then mixes with the extinguishing water to form the foaming agent-water mixture.
  • the conventional fittings for foaming and foam delivery work according to the Venturi principle described above.
  • Such a fitting is connected to the respective hose connection of the admixer for the foaming agent via a hose and is located at the end of the hose remote from the mixer, where it serves to mix the foaming agent-water mixture air at atmospheric pressure to foam.
  • the liquid foam medium is first admixed with the extinguishing water flow in the compressed-air foam system by means of one of the known principles (pressurized mixing or venturi mixing, see above).
  • a compressed gas - usually compressed air - added and thereby achieved a foaming before the resulting compressed air foam leaves the compressed air foam system at a hose connection via a hose.
  • the invention has for its object to provide a simple and inexpensive arrangement for generating a foam extinguishing foam, which allows an extinguishing foam generation and delivery near the admixture of the foaming agent, so that the extinguishing foam on a foam discharge outlet of the arrangement in particular for further promotion by a hose, a piping, a pipe or the like. can be provided without this necessarily be used compressed gases.
  • the object also includes the provision of a corresponding method for producing an extinguishing foam.
  • an extinguishing foam comprising (i) a first venturi element for forming a foaming agent-water mixture, a water inlet, via which a water flow can be fed in under pressure, an optionally closable foam agent inlet, via which a foaming agent can be supplied, a mixing area in which the foaming agent is admixed to the water flow according to the Venturi principle, and an outlet for the foaming agent water (Ii) a gas supply device via which air and / or quenching gases can be supplied as gas to the foam-water mixture for the formation of the extinguishing foam, and (iii) an extinguishing foam outlet for discharging the extinguishing foam;
  • the gas supply device has a second venturi element connected in parallel with the first venturi element to form a gas-water mixture which has a water inlet, via which a water flow can be fed under pressure, an optionally closable gas inlet, via
  • a) a water stream is fed under pressure to form a foaming agent-water mixture in the mixing region of the first venturi element via the water inlet of the first venturi element, while a foaming agent is introduced via the foam medium inlet of the first venturi element is fed, and b) to form a gas-water mixture in the mixing region of the first venturi element in parallel second Venturi element of the gas supply via the water inlet of the second Venturielements a water flow fed under pressure, while on the gas inlet the gas and / or quenching gases is / are supplied to the second Venturielements as c), which is discharged via the output of the first Venturielements foaming agent-water mixture and the output via the output of the second Venturielements gas-water mixture in the mixing chamber of the arrangement be mixed to form the extinguishing foam before d) the extinguishing foam is discharged through the extinguishing foam outlet of
  • first Venturielement and a “second Venturi element” is mentioned, this is not to be understood as limiting only two Venturiemia, but may be provided according to the respective requirements also further, with respect to said Venturi elements in parallel Venturi elements.
  • mixing chamber in the sense of the invention should be understood as meaning the location at which the outputs of the parallel-connected venturi elements are combined in front of the extinguishing foam outlet, without a specific, in particular larger, spatial extension necessarily being associated with this location.
  • the arrangement according to the invention can be constructed with possibly standardized, simple components, which not only allows a cost-effective production, but also an easy cleaning and easy maintenance is conducive.
  • costly training for operation or for emergency operation of the arrangement can be omitted, since the arrangement is easy to use and their components (Venturi elements and connections) eg emergency services of the fire brigades are generally familiar in their function anyway.
  • a further, essential advantage of the arrangement according to the invention is also to be seen in the fact that the arrangement can be used in a variety of ways during an extinguishing operation, without interruption of the extinguishing record and / or time-consuming conversion work (disconnecting and / or reconnecting hoses, etc.). would require.
  • the gas inlet of the second venturi element can be provided with a constant cross section.
  • the gas inlet of the second Venturielements has a cross section which is variable to regulate the gas quantity to adjust the degree of foaming and / or to influence the foam quality.
  • the gas inlet of the second Venturielements be in this case provided with a ball valve or metering valve, which is continuously adjustable for gas flow regulation by means of a handle, which allows a very sensitive adjustment of the gas-water mixture.
  • a change in the cross section at the gas inlet in fixed stages is also conceivable.
  • the foam agent inlet of the first venturi element can in principle also be designed with a constant cross section.
  • the Schaumffeneingang the first Venturi element also has a cross section which is changeable for Schaumffen-quantity control, so as to set a constant, so with one and the same foaming agent whose concentration in the foaming agent-water mixture optionally different.
  • a particularly accurate adjustment of the concentration is conducive to this - currently preferred - embodiment, in which the Schaumffeneingang the first Venturielements is provided with a ball valve or metering valve, which is infinitely adjustable for foam quantity control by means of a handle.
  • a manifold is provided with a water inlet and two water outlets, one of which is a water outlet to the water inlet of first Venturi element is connected, while the other water outlet is fluidly connected to the water inlet of the second Venturielements.
  • a common water supply is always in front of the two Venturi elements on the same water pressure, so that the mixing behavior of the two Venturi elements is not dependent on different water supply pressures.
  • a common water inlet simplifies the use of the arrangement.
  • the clear cross sections of the water inlet of the distributor and the extinguishing foam outlet such that they are the same size.
  • the water inlet of the manifold has a clear cross-section, which is smaller by a factor of about 2/3 than a clear cross section of the extinguishing foam, which takes into account the fact that the extinguishing foam produced from a predetermined amount of water a larger volume occupies as this amount of water itself.
  • the water inlet of the second Venturielements be a shut-off upstream, by means of which the water inlet of the second Venturielements is selectively closed. After shutting off the water inlet of the second Venturielements by means of the obturator, only the first Venturielement flows through the water, so that the arrangement behaves in this mode of operation as a conventional Venturi mixer.
  • the mixing of the foaming agent-water mixture and the gas-water mixture to generate foam in the mixing chamber by simply merging the departing from the Venturi elements flows done, ie without the use of other technical aids.
  • the mixing in the mixing chamber but still be optimized by the mixing chamber is provided with an additional mixing structure.
  • elements for targeted flow diversion such as baffles, commercially available, so-called "static" mixer without moving parts and / or grid, nets, screens or the like. used to refine the gas bubbles in the extinguishing foam.
  • the first venturi element and the second venturi element can be of equal size in terms of their flow cross sections for water, which advantageously allows the use of identical parts.
  • the second venturi element of the gas supply device can also be dimensioned smaller than the first venturi element with regard to its flow cross section for water. Preference is given here to a combination of venturi elements in which the first venturi element has a first flow cross section for water and the second venturi element has a second flow cross section for water, wherein a ratio of the second flow cross section to the first flow cross section is greater than or equal to 2: 5 and less than or equal to 1: 1 ,
  • the arrangement may further comprise, according to the respective application requirements, one or more of the following measuring devices: (a) A first measuring device for detecting and displaying a measured variable is representative of the amount and / or the pressure of the foaming agent added to the water flow by means of the first venturi element. (B) A second measuring device for detecting and displaying a measured variable which is representative of the amount and / or the pressure of the gas mixed with the water flow by means of the second Venturielements. (c) A third measuring device for detecting and displaying the pressure and / or the amount of injected Water flow. (d) A fourth measuring device for detecting and indicating the pressure and / or the amount of the medium discharged at the extinguishing foam outlet.
  • the inventive arrangement can be installed stationary, fixed in a fire truck or used as a stand-alone unit mobile.
  • the arrangement may have a portable housing in which at least the first venturi element, the second venturi element and the mixing chamber are accommodated.
  • the arrangement can finally be designed so that the water inlet of the manifold and the extinguishing foam exit led out of the housing and are provided outside the housing end each with a hose coupling.
  • the arrangement is thus advantageously readily usable in combination with the equipment (hoses, couplings, pumps, etc.) which is normally present in fire services anyway.
  • an arrangement for producing a quenching foam L is generally indicated at 10.
  • the illustrated arrangements 10 have in common that they have two parallel Venturi elements 12, 14, namely a first Venturielement 12 for forming a foaming agent-water mixture and a second Venturielement 14 of a generally 15 denoted gas supply means for forming a gas-water mixture , While the first Venturielement 12 a water inlet 16, via which a water flow W can be fed under pressure, an optionally closable Schaumffeneingang 18 through which a foaming agent S can be fed, a mixing region 20, in which the foaming agent S the water flow W according to the Venturi principle is/2017ischbar, and having an output 22 for the foaming agent-water mixture, the second venturi element 14 has a water inlet 24, via which a water flow W can be fed under pressure, an optionally closable gas inlet 26, via the air and / or extinguishing gases as gas G can be fed, a mixing region 28 in which the gas G is
  • the outlet 22 of the first venturi element 12 and the outlet 30 of the second venturi element 14 in a mixing chamber 32 which serves to form the extinguishing foam L from the foaming agent-water mixture and the gas-water mixture and in turn is fluidly connected to a discharge foam outlet 34 for discharging the extinguishing foam L.
  • the gas G for the formation of the extinguishing foam L can be supplied to the foam-water mixture before the latter leaves the arrangement 10 via the extinguishing foam exit 34 and without the pressure loss added to the second venturi element 14 to the pressure loss at the first Venturi element 12 as in a series circuit.
  • the arrangement 10 has a housing 36 indicated here only schematically with a dashed line, in which (at least) the first venturi element 12, the second venturi element 14 and the mixing chamber 32 are accommodated.
  • the housing 36 according to the first embodiment also includes other components of the assembly 10, which will also be described in more detail below.
  • Such, possibly portable housing 36 is particularly suitable when the arrangement 10 is to be used on the move.
  • the individual components of the arrangement 10 can also be installed without their own housing, possibly with more than two, ie a plurality of parallel-connected venturi elements and corresponding piping, for example in stationary extinguishing systems in buildings, large emergency vehicles. such as (tank) fire fighting vehicles, such as those used at airports, foamers for refineries, etc.
  • a common water inlet 38 for the two venturi elements 12, 14 and the extinguishing foam outlet 34 are led out of the housing 36 and outside the housing 36 at the end each with a hose coupling 40, 42 provided.
  • the water inlet 38 here has a clear cross section 44, which is smaller by a factor of about 2/3 than a light cross section 46 of the extinguishing foam outlet 34.
  • the water inlet 38 for example, with a hose coupling 40 of type C (hard coupling to DIN 14317) may be provided, while the extinguishing foam outlet 34 may have a hose coupling 42 of type B (fixed coupling according to DIN 14318), so that firefighters typical hoses can be connected to the assembly 10, with a larger cross section for the outgoing extinguishing foam L and a smaller Cross section for the supplied water W.
  • a hose coupling 40 of type C hard coupling to DIN 14317
  • the extinguishing foam outlet 34 may have a hose coupling 42 of type B (fixed coupling according to DIN 14318), so that firefighters typical hoses can be connected to the assembly 10, with a larger cross section for the outgoing extinguishing foam L and a smaller Cross section for the supplied water W.
  • the arrangement 10 has on the input side a pants tube-like distributor piece 48, which on the in Fig. 1 left side forms the water inlet 38 and on the in Fig. 1 right side to two water outlets 50, 52 branches, of which one water outlet 50 is connected to the water inlet 16 of the first Venturielements 12, while the other water outlet 52 is in fluid communication with the water inlet 24 of the second Venturielements 14.
  • the water inlet 24 of the second Venturielements 14 in the manifold 48 a shut-off 54, for example, a ball valve upstream, by means of which the water outlet 52 of the manifold 48 and thus the water inlet 24 of the second Venturielements 14 can be selectively closed.
  • a shut-off device may also be provided in the water outlet 50 of the distributor piece 48 leading to the water inlet 16 of the first venturi element 12 (in FIG Fig. 1 not shown), which makes it possible, for example, for cleaning purposes, to supply one or the other Venturi element 12 or 14 with water.
  • the individual Venturi elements 12, 14 have in the in Fig. 1 shown in an embodiment known per se in the flow direction of the water seen in succession the following components: a sieve 56, 57 in the water inlet 16 or 24 to prevent any solids in the water W to get into the interior of the respective Venturi element 12, 14 and possibly clogging, one to the mixing area 20 and 28 leading drive nozzle 58, 59 for flow acceleration and a catching nozzle 60, 61 after the mixing region 20 and 28 for receiving and forwarding the respective mixture (foam-water mixture or gas-water mixture).
  • each Venturi element 12, 14 in a conventional manner, a respective nozzle assembly 58, 60 and 59, 61 bypassing 62, 63, in which a control valve 64, 65 is connected to the pressure fluctuations in the respective water inlet 16, 24th responsive to pass a partial flow past the respective nozzle assembly 58, 60 and 59, 61 passing through the corresponding bypass 62 and 63, and thus to keep the pressure conditions in the respective mixing region 20 and 28 substantially constant.
  • the corresponding inlet 18, 26 for foaming agent S or gas G is connected to the respective mixing region 20, 28 via a check valve 66, 67.
  • the two Venturi elements 12, 14 may be dimensioned differently sized, in particular such that the first Venturi element 12 for the foaming agent S has larger flow cross sections for the water W than the second Venturi element 14 for the gas G. More precisely, the first Venturi element 12 has a first Flow cross section 68 for water W and the second Venturielement 14 a second flow cross-section 69 for water W, wherein a ratio of the second flow cross-section 69 to the first flow cross-section 68 here about 2: 5.
  • the Schaumffeneingang 18 of the first Venturielements 12 has a cross section which is changeable for foam quantity control.
  • a ball valve 70 - or other suitable actuator such as a metering valve - provided, which is infinitely adjustable for Schaumffen-amount regulation by means of a handle 72.
  • An input side of the ball valve 70 connected pipe section 74 is led out of the housing 36 and there at the free end with a coupling 76 for connection to a foam agent source (not shown).
  • an actuator is provided in the first embodiment, so that the gas inlet 26 of the second Venturielements 14 has a cross section which can be changed to control the gas flow. More specifically, here is a ball valve 78 - or other suitable actuator, such as a metering - built-in, which can be adjusted continuously for gas flow regulation by means of another handle 80.
  • An input side connected to the ball valve 78 further pipe section 82 is also led out of the housing 36 and provided at the cantilevered free end with a coupling 84 for connection to a gas source (not shown). This can depending on the purpose of the arrangement 10 but also only a suction with air filter or the like. (not shown) are connected.
  • the couplings 76, 84 may be formed, for example, as Type D couplings (e.g., fixed couplings to DIN 14306) to be compatible with firefighting equipment.
  • a pants tube-like claw 86 which merges the outgoing from the Venturi elements 12, 14 via the outputs 22, 30 fluid streams (foam-water mixture or gas-water mixture) to the mixing chamber 32, where the mixing of the two (pre) mixtures to the extinguishing foam L takes place.
  • the dashed lines at 88 indicate in Fig. 1
  • an additional Mixed structure which may be provided in the mixing chamber 32 and / or the claw 86 but need not, in order to support the mixing of the two (pre) mixtures to the extinguishing foam L before this goes on the extinguishing foam exit 34 from the assembly 10.
  • the optional mixing structure 88 may be baffles, commercially available, so-called "static" mixer without moving parts and / or grid, nets, screens or the like. act.
  • the arrangement 10 can be provided with a measuring device or several measuring devices which are intended to make it easier for the operator to obtain well reproducible foam results, fine-tune the quality of the produced extinguishing foam and / or monitor the proper operation of the arrangement 10. to control.
  • a measuring device or several measuring devices which are intended to make it easier for the operator to obtain well reproducible foam results, fine-tune the quality of the produced extinguishing foam and / or monitor the proper operation of the arrangement 10. to control.
  • a first measuring device 90 for detecting and displaying a measured variable for the amount and / or pressure of the water flow W means a second measuring device 92 for detecting and displaying a measured variable representative of the amount and / or pressure of the gas G admixed with the water flow W by means of the second venturi element 14, a third measuring device 94 for Detection and display of the pressure and / or the amount of the injected water flow W and a fourth measuring device 96 for detecting and displaying the pressure and / or the amount of the discharged at the foam discharge outlet 34 medium.
  • the Fig. 2 shows the arrangement 10 for producing an erase foam according to the second embodiment, which will be described below only insofar as it is from the above with reference to the Fig. 1 described first embodiment differs, wherein the same or corresponding parts are numbered with the same reference numerals.
  • the mobile device 10 is according to Fig. 2 provided at the top of the housing 36 with a handle 98 to allow easy transport of the assembly 10 as an integral equipment.
  • feet 100 are mounted so that the assembly 10 can be safely parked on not quite even surfaces.
  • the water inlet 38 and the extinguishing foam outlet 34 are shown on the left and right, both of which - as in the first embodiment - led out of the housing 36, in the second embodiment, however, have the same clear cross-sections, resulting in the same types of hose couplings 40, 42 to recognize.
  • the second embodiment also extend in parallel arrangement upwardly out of the housing 36 from the Schaumffeneingang 18 of the first Venturielements (not shown) and - as part of the Gaszu slaughter grounds 15 - the gas inlet 26 of the second Venturielements (also not shown), where the inputs 18, 26 are each provided directly with a closable coupling 76 and 84, respectively.
  • a shut-off device for the (common) water supply is also not provided on or in the housing 36 and would have to be connected externally.
  • hose coupling 40 In the direction of the hose coupling 40 in front of the couplings 76, 84 for the foaming agent or gas displays of two measuring devices are mounted on the outside of the housing 36 in a corresponding juxtaposition, namely a display of the second measuring device 92 for pressure detection of the (part) water flow W means of the second Venturielements admixed gas G and an indication of the third measuring device 94 for detecting and displaying the pressure of the injected water flow W. Further measuring devices are not present in this embodiment.
  • a pants tube-like manifold for the water connected thereto, parallel venturi elements for the foaming agent and the gas and an attached, pants tube similar collecting piece, which merges the mixture outputs of Venturi elements and at the same time connected to the extinguishing foam outlet 34 mixing chamber forms.
  • the assembly 10 according to the second embodiment is extremely robust and maintenance-free.
  • Fig. 3 to 5 show the arrangement 10 for generating an erase foam according to a third embodiment, which in the following structurally again only to be described insofar as it differs from the other embodiments, wherein the same or corresponding parts are again provided with the same reference numerals.
  • the two Venturi sculpture 12, 14 formed in the simplest way by Venturi tubes, with a cross-sectional taper to form the respective mixing region 20, 28 and therein transversely to the respective water (partial) flow foaming agent inlet 18 or gas inlet 26.
  • identically designed venturi elements 12, 14 are used in which the ratio of flow cross sections 68, 69 is equal to 1: 1.
  • mixing structure 88 are in the Fig. 3 to 5 indicated in the region of the collecting piece 86 at the beginning of the mixing chamber 32 arranged baffles.
  • FIG. 2 illustrates a dry foam insert of the arrangement 10 with simultaneous admixture of the foaming agent S via the first venturi element 12 and the gas G via the second venturi element 14 to the water flow W supplied via the water inlet 38 and divided by the manifold 48, whereupon the resulting mixtures - foaming agent Water mixture at the outlet 22 of the first Venturielements 12 and gas-water mixture at the output 30 of the second Venturielements 14 - are brought together via the claw 86 in the mixing chamber 32, where then the extinguishing foam L is formed, which finally on the extinguishing foam outlet 34 of the arrangement 10 can be delivered to eg a hose.
  • Possible process parameters for the use of dry foam when using under the trade name "ifoam®" of the Febbex International GmbH, Frankfurt am Main, Germany, commercially available foaming agent are as follows: inlet pressure at the water inlet 38 greater than 8 bar; Output pressure at the extinguishing foam outlet 34 approx. 2/3 of the inlet pressure; Foaming greater 8-fold at 12 bar inlet pressure; Ball valve 78 on the second venturi element 14 for air as gas G fully open, for a volume flow of about 3000 L / min; Ball valve 70 on the first venturi element 12 for an admixture of 2 to 3% of the foaming agent S open.
  • Fig. 4 illustrates a wetting agent insert of the assembly 10 in which the ball valve 78 on the second venturi element 14 for the gas is completely closed, while the ball valve 70 is opened on the first venturi element 12 for the admixture of foaming agent S to the water W defined.
  • Foaming agent concentration results in a wetting agent N, which is not foamed, but in which the foaming agent S only serves to reduce the surface tension.
  • enlarged opening of the ball valve 70 on the first Venturielement 12 for a higher admixture of foaming agent to the water W can also be a conventional foam insert done when a conventional foam jet pipe is connected to the media outlet 34 via a hose, which then foamed the Schaumstoff-Wasser- Mixture with air is used.
  • FIG. 5 a pure water use of the arrangement 10, for which only the ball valves 70, 78 are to be closed at both venturi elements 12, 14, so that the water W flows through the arrangement 10 from the water inlet 38 to the media outlet 34; It will thus be apparent to those skilled in the art that the arrangement 10 can be used in a variety of ways without the need for costly retooling work.
  • An arrangement for producing an extinguishing foam comprises a first venturi element for forming a foaming agent-water mixture which has a water inlet, an optionally closable foam agent inlet, a mixing area in which the supplied foaming agent is admixable to the injected water flow according to the Venturi principle, and an outlet for the foaming agent-water mixture, a gas supply device, via which a gas can be supplied to the foaming agent / water mixture for the formation of the extinguishing foam, and an extinguishing foam outlet for extinguishing foam delivery.
  • the gas supply has a parallel to the first Venturielement switched second Venturielement to form a gas-water mixture, which is a water inlet, an optional closable gas inlet, a mixing area in which the gas supplied to the fed water flow according to the Venturi principle is immiscible, and having an outlet for the gas-water mixture, wherein the outputs of the venturi elements in one of the formation of the foam from the foaming agent-water mixture and the gas-water mixture serving mixing chamber open, from which the extinguishing foam outlet goes off.

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Claims (15)

  1. Ensemble (10) destiné à produire une mousse extinctrice, comprenant
    un premier élément de Venturi (12) pour la formation d'un mélange d'agent moussant et d'eau, qui présente une entrée d'eau (16), par l'intermédiaire de laquelle un flux d'eau peut être injecté sous pression, une entrée d'agent moussant (18) pouvant être fermée sélectivement et permettant l'amenée d'un agent moussant, une zone de mélange (20), dans laquelle l'agent moussant peut être ajouté et mélangé au flux d'eau selon le principe de Venturi, et une sortie (22) pour le mélange d'agent moussant et d'eau,
    un dispositif d'amenée de gaz (15), par l'intermédiaire duquel de l'air et/ou des gaz d'extinction peuvent être amenés en tant que gaz au mélange d'agent moussant et d'eau pour la formation de la mousse extinctrice, et
    une sortie de mousse extinctrice (34) pour la distribution de la mousse extinctrice,
    caractérisé en ce que le dispositif d'amenée de gaz (15) possède un deuxième élément de Venturi (14), monté parallèlement au premier élément de Venturi (12), pour la formation d'un mélange de gaz et d'eau, lequel deuxième élément présente une entrée d'eau (24), par l'intermédiaire de laquelle un flux d'eau peut être injecté sous pression, une entrée de gaz (26) pouvant être fermée sélectivement et permettant l'amenée du gaz, une zone de mélange (28), dans laquelle le gaz peut être ajouté et mélangé au flux d'eau selon le principe de Venturi, et une sortie (30) pour le mélange de gaz et d'eau,
    dans lequel la sortie (22) du premier élément de Venturi (12) et la sortie (30) du deuxième élément de Venturi (14) débouchent dans une chambre de mélange (32), qui sert à la formation de la mousse extinctrice à partir du mélange d'agent moussant et d'eau et du mélange de gaz et d'eau et qui est pour sa part en liaison fluidique avec la sortie de mousse extinctrice (34).
  2. Ensemble (10) selon la revendication 1, caractérisé en ce que l'entrée de gaz (26) du deuxième élément de Venturi (14) possède une section transversale qui peut être modifiée pour réguler la quantité de gaz.
  3. Ensemble (10) selon la revendication 2, caractérisé en ce que l'entrée de gaz (26) du deuxième élément de Venturi (14) est prévue avec un robinet à tournant sphérique (78) ou une soupape de dosage, lequel/laquelle peut être réglé(e) de manière continue au moyen d'une manette (80) pour réguler la quantité de gaz.
  4. Ensemble (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'entrée d'agent moussant (18) du premier élément de Venturi (12) possède une section transversale qui peut être modifiée pour réguler la quantité d'agent moussant.
  5. Ensemble (10) selon la revendication 4, caractérisé en ce que l'entrée d'agent moussant (18) du premier élément de Venturi (12) est prévue avec un robinet à tournant sphérique (70) ou une soupape de dosage, lequel/laquelle peut être réglé(e) de manière continue au moyen d'une manette (72) pour réguler la quantité d'agent moussant.
  6. Ensemble (10) selon l'une quelconque des revendications précédentes, caractérisé par un répartiteur (48) pourvu d'une entrée d'eau (38) et de deux sorties d'eau (50, 52), dont l'une des sorties d'eau (50) est raccordée à l'entrée d'eau (16) du premier élément de Venturi (12), tandis que l'autre sortie d'eau (52) est en liaison fluidique avec l'entrée d'eau (24) du deuxième élément de Venturi (14).
  7. Ensemble (10) selon la revendication 6, caractérisé en ce que l'entrée d'eau (38) du répartiteur (48) possède une section transversale intérieure (44) qui est plus petite d'un facteur d'environ 2/3 qu'une section transversale intérieure (46) de la sortie de mousse extinctrice (34).
  8. Ensemble (10) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un organe d'arrêt (54), au moyen duquel l'entrée d'eau (24) du deuxième élément de Venturi (14) peut être fermée sélectivement, est monté en amont de l'entrée d'eau (24) du deuxième élément de Venturi (14).
  9. Ensemble (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que la chambre de mélange (32) est prévue avec une structure de mélange (88) supplémentaire.
  10. Ensemble (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que le premier élément de Venturi (12) présente une première section transversale de débit (68) pour l'eau et le deuxième élément de Venturi (14) présente une deuxième section transversale de débit (69) pour l'eau, dans lequel un rapport de la deuxième section transversale de débit (69) sur la première section transversale de débit (68) est supérieur ou égal à 2/5 et inférieur ou égal à 1/1.
  11. Ensemble (10) selon l'une quelconque des revendications précédentes, caractérisé par
    un premier dispositif de mesure (90) destiné à enregistrer et à afficher une grandeur de mesure qui est représentative de la quantité et/ou de la pression de l'agent moussant ajouté et mélangé au flux d'eau au moyen du premier élément de Venturi (12), et/ou
    un deuxième dispositif de mesure (92) destiné à enregistrer et à afficher une grandeur de mesure qui est représentative de la quantité et/ou de la pression du gaz ajouté et mélangé au flux d'eau au moyen du deuxième élément de Venturi (14).
  12. Ensemble (10) selon l'une quelconque des revendications précédentes, caractérisé par
    un troisième dispositif de mesure (94) destiné à enregistrer et à afficher la pression et/ou la quantité du flux d'eau injecté et/ou
    un quatrième dispositif de mesure (96) destiné à enregistrer et à afficher la pression et/ou la quantité du milieu distribué par la sortie de mousse extinctrice (34).
  13. Ensemble (10) selon l'une quelconque des revendications précédentes, caractérisé par un boîtier (36) éventuellement portatif, dans lequel sont logés au moins le premier élément de Venturi (12), le deuxième élément de Venturi (14) et la chambre de mélange (32).
  14. Ensemble (10) selon la revendication 13 et au moins la revendication 6, caractérisé en ce que l'entrée d'eau (38) du répartiteur (48) et la sortie de mousse extinctrice (34) sont guidées à l'extérieur du boîtier (36) et sont prévues chacune en extrémité à l'extérieur du boîtier (36) avec un raccord pour tuyau souple (40, 42).
  15. Procédé pour produire une mousse extinctrice au moyen d'un ensemble (10) selon l'une quelconque des revendications précédentes, selon lequel
    a) pour la formation d'un mélange d'agent moussant et d'eau, un flux d'eau est injecté sous pression dans la zone de mélange (20) du premier élément de Venturi (12) par l'entrée d'eau (16) du premier élément de Venturi (12), tandis qu'un agent moussant est amené par l'entrée d'agent moussant (18) du premier élément de Venturi (12),
    b) pour la formation d'un mélange de gaz et d'eau, un flux d'eau est injecté sous pression dans la zone de mélange (28) du deuxième élément de Venturi (14) du dispositif d'amenée de gaz (15), lequel deuxième élément est monté parallèlement au premier élément de Venturi (12), par l'entrée d'eau (24) du deuxième élément de Venturi (14), tandis que de l'air et/ou des gaz d'extinction sont amenés en tant que gaz par l'entrée de gaz (26) du deuxième élément de Venturi (14),
    c) à la suite de quoi le mélange d'agent moussant et d'eau distribué par la sortie (22) du premier élément de Venturi (12) et le mélange de gaz et d'eau distribué par la sortie (30) du deuxième élément de Venturi (14) sont mélangés dans la chambre de mélange (32) de l'ensemble (10) pour la formation de la mousse extinctrice
    d) avant que la mousse extinctrice ne soit distribuée par la sortie de mousse extinctrice (34) de l'ensemble (10).
EP16731026.7A 2015-06-02 2016-06-01 Dispositif et procédé pour produire une mousse extinctrice Active EP3302719B1 (fr)

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DE102015006833.4A DE102015006833A1 (de) 2015-06-02 2015-06-02 Anordnung zum Erzeugen eines Löschschaums
PCT/EP2016/000893 WO2016192852A1 (fr) 2015-06-02 2016-06-01 Dispositif et procédé pour produire une mousse extinctrice

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US1785723A (en) * 1927-06-16 1930-12-16 Nat Foam System Inc Apparatus for producing fire-extinguishing foam
FR918092A (fr) * 1945-11-29 1947-01-29 Perfectionnement aux lances d'incendie, d'arrosage, et pour toutes autres applications
US5113945A (en) * 1991-02-07 1992-05-19 Elkhart Brass Mfg. Co., Inc. Foam/water/air injector mixer
US5255747A (en) * 1992-10-01 1993-10-26 Hale Fire Pump Company Compressed air foam system
DE202004006977U1 (de) * 2004-04-30 2004-08-26 Vigh, Andreas, Dipl.-Ing. (Fh) Löscheinrichtung zur Brandbekämpfung
CA2861760C (fr) * 2011-12-27 2018-02-27 Sung Woo Kim Gicleur venturi de regulation de la fumee et appareil d'elimination de la fumee et des gaz toxiques
US10610836B2 (en) * 2013-11-01 2020-04-07 John Boticki High flow liquid dispensing system and method

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WO2016192852A1 (fr) 2016-12-08
EP3302719A1 (fr) 2018-04-11

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