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EP4355493A1 - Self-contained device for generating a viscous foam - Google Patents

Self-contained device for generating a viscous foam

Info

Publication number
EP4355493A1
EP4355493A1 EP22741339.0A EP22741339A EP4355493A1 EP 4355493 A1 EP4355493 A1 EP 4355493A1 EP 22741339 A EP22741339 A EP 22741339A EP 4355493 A1 EP4355493 A1 EP 4355493A1
Authority
EP
European Patent Office
Prior art keywords
foam
conduit
cage
mixer
compressed gas
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.)
Pending
Application number
EP22741339.0A
Other languages
German (de)
French (fr)
Inventor
Fabien FRANCES
Pierre VENDITTI
Célia LEPEYTRE
Agnès GRANDJEAN
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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 Commissariat a lEnergie Atomique CEA, Commissariat a lEnergie Atomique et aux Energies Alternatives CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of EP4355493A1 publication Critical patent/EP4355493A1/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/45—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
    • B01F25/452—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces
    • B01F25/4524—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces the components being pressed through foam-like inserts or through a bed of loose bodies, e.g. balls
    • B01F25/45241—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces the components being pressed through foam-like inserts or through a bed of loose bodies, e.g. balls through a bed of balls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/235—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids for making foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/211—Measuring of the operational parameters
    • B01F35/2113—Pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
    • B01F35/32—Driving arrangements
    • B01F35/32005—Type of drive
    • B01F35/3203—Gas driven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/7176—Feed mechanisms characterised by the means for feeding the components to the mixer using pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/75—Discharge mechanisms
    • B01F35/754—Discharge mechanisms characterised by the means for discharging the components from the mixer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/83—Forming a predetermined ratio of the substances to be mixed by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices
    • B01F35/831—Forming a predetermined ratio of the substances to be mixed by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices using one or more pump or other dispensing mechanisms for feeding the flows in predetermined proportion, e.g. one of the pumps being driven by one of the flows
    • B01F35/8311—Forming a predetermined ratio of the substances to be mixed by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices using one or more pump or other dispensing mechanisms for feeding the flows in predetermined proportion, e.g. one of the pumps being driven by one of the flows with means for controlling the motor driving the pumps or the other dispensing mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/004—Arrangements for controlling delivery; Arrangements for controlling the spray area comprising sensors for monitoring the delivery, e.g. by displaying the sensed value or generating an alarm
    • B05B12/006—Pressure or flow rate sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/0018—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam
    • B05B7/0025—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam with a compressed gas supply
    • B05B7/0031—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam with a compressed gas supply with disturbing means promoting mixing, e.g. balls, crowns
    • B05B7/0043—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam with a compressed gas supply with disturbing means promoting mixing, e.g. balls, crowns including a plurality of individual elements, e.g. needles, baffles, rotatable blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2405—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle
    • B05B7/2416—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle characterised by the means for producing or supplying the atomising fluid, e.g. air hoses, air pumps, gas containers, compressors, fans, ventilators, their drives
    • B05B7/2421—Gas containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2464—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device a liquid being fed by mechanical pumping from the container to the nozzle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2472—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device comprising several containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/26—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device
    • B05B7/262—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device a liquid and a gas being brought together before entering the discharge device
    • B05B7/267—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device a liquid and a gas being brought together before entering the discharge device the liquid and the gas being both under pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/003—Cleaning involving contact with foam
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/001—Decontamination of contaminated objects, apparatus, clothes, food; Preventing contamination thereof
    • G21F9/002—Decontamination of the surface of objects with chemical or electrochemical processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2215/00—Auxiliary or complementary information in relation with mixing
    • B01F2215/04—Technical information in relation with mixing
    • B01F2215/0413—Numerical information
    • B01F2215/0418—Geometrical information
    • B01F2215/0431—Numerical size values, e.g. diameter of a hole or conduit, area, volume, length, width, or ratios thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/004—Arrangements for controlling delivery; Arrangements for controlling the spray area comprising sensors for monitoring the delivery, e.g. by displaying the sensed value or generating an alarm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2475—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device comprising a container carried on the back of the user

Definitions

  • the present invention relates to an autonomous device for generating viscose foam.
  • viscose foams that is to say enriched with a gelling agent which increases the physical stability of the foams and makes them less able to flow on even very inclined or vertical surfaces.
  • a gelling agent which increases the physical stability of the foams and makes them less able to flow on even very inclined or vertical surfaces.
  • WO 2013/067401 A2 An example of a foam generating device is described in WO 2013/067401 A2; this device is partially portable, but it is designed for ordinary foams used against fires.
  • An object of the invention is to manufacture foams, in particular special high-expansion foams, reliably, at a high rate, by means of a suitable generator whose operation is stable.
  • the invention relates to a device for generating foam, comprising a reservoir of a foaming liquid, a cylinder of compressed gas, a first pipe leaving the reservoir and passing through a pneumatic pump while being connected to suction and discharge ports of said pneumatic pump, a second conduit exiting from the bottle and passing through a regulator, the first conduit and the second conduit joining at a junction; a conduit for transporting a mixture of the foaming liquid and the compressed gas extending between the junction and an end (7) for ejecting the foam; a mixer of the foaming liquid and the compressed gas, at an inlet of which the first conduit and the second conduit end and in which the foam is formed, and located on the conduit for transporting the mixture between the junction and the ejection end; the second conduit comprising a bifurcation leading to a starting port of the pneumatic pump; characterized in that the mixer comprises a cylindrical wall open at the two axial ends and through which the mixture passes between the said axial ends, a cage formed in the cylindrical wall, and at
  • This device where the compressed gas is used both to make the foam and to suck the foaming liquid out of its reservoir, makes it possible to dispense with the need for an electrical power supply to the device involving either the servitude of an external supply by cables, or a heavy battery.
  • the flow rate of the liquid drawn in, conditioned by the energy supplied to the pump is proportional to the pressure of the compressed gas, and the flow rate of the compressed gas used to produce the foam is also proportional to this pressure.
  • the stability of the expansion of the foam that is to say of the value of its liquid fraction, is therefore guaranteed without any adjustment.
  • the mixer integrated into the device is well suited to produce a foam having the required qualities. Since the balls are few in number in the cage and of much smaller dimensions than the latter, they do not form superimposed layers there but on the contrary remain free and perform independent and significant movements, capable of giving a high expansion of the foam.
  • the device comprises a manometer for measuring the pressure of the compressed gas in the bottle;
  • the mixture transport conduit comprises a flexible lance
  • the device comprises a single control lever, arranged on the lance, for opening the lance and ejecting the foam;
  • the cage is delimited by two successive grids in the cylindrical wall; - the device is mounted on a portable frame or a rolling cart, and completely independent, in service, of external supplies, in particular electricity or fluids.
  • FIG. 1 is a diagram of an embodiment of the invention
  • FIG. 2 shows the mixer
  • the device comprises a tank 1 of foaming solution in the liquid state, a bottle 2 of compressed air, a pressure gauge 3, a main regulator 4, a pneumatic pump 5, a mixer 6, a foam ejection end 7, and a frame 8.
  • a first conduit 11 connects an outlet orifice of reservoir 1 to a suction orifice 12 of pneumatic pump 5; it emerges from the pneumatic pump 5 through its discharge orifice 13, passes through the mixer 6 and ends at the end 7.
  • a second conduit 14 connects an outlet orifice of the bottle 2 to the main regulator 4, then joins the first conduit 11 at a junction 15 made between the discharge orifice of the pneumatic pump 5 and the mixer 6.
  • a bifurcation 16 of the second conduit 14 leads to an orifice 17 for setting the rotor of the pneumatic pump 5 in motion (possibly via a second pressure reducer 43 to independently adjust the pressure there).
  • the bifurcation 16 leaves the second conduit 14 just downstream of the main regulator 4 and therefore transports slightly compressed air at constant pressure (7 bars for example).
  • the pressure gauge 3 is connected by a pressure tapping conduit 20 to the second conduit 14, upstream of the main regulator 4, and it therefore makes it possible to measure the pressure of the gas at the outlet of the bottle 2 and to evaluate the filling of that -this.
  • the frame 8 carries the tank 1, the bottle 2, the main regulator 4, the pneumatic pump 5, the first pipe 11 and the second pipe 14.
  • the frame 8 can be vertical and belong to a bag backpack carried by the operator of the device; the frame 8 can also be a trolley, for example.
  • the foam ejection end 7 is not attached to the frame 8, but is located at the end of a flexible lance 21, held by the operator.
  • the lance 21 extends between the end 7 on the one hand, and the junction 15 on the other hand.
  • the mixer 6 is located on the path of the mixture of liquid and compressed air between the junction 15 and the end 7, and it is represented in FIG. a cylindrical wall and occupying its entire section, two seals 29 to which the grids 28 are respectively fixed and which serve as their support for the wall of the bore 24, and spherical and rigid balls 30 free to move between the grids 28.
  • the seals 29 serve to hold the grids 28 in place and to form between them a cage 31, further delimited by the wall of the bore 24, and in which the balls 30 are retained. They also force all the fluids circulating in the bore 24 to pass through the inside of the cage 31.
  • This type of mixer comprising balls, or more generally solid bodies, free in a cage through which the previously mixed fluids pass has proven to be very effective in producing foams whose expansion is well determined and possibly high, i.e. ie low liquid fraction. It is particularly suitable for the manufacture of viscose foams.
  • the cage 31 can be 10 to 400 mm in length, 10 to 100 mm in diameter, and the balls 30 from 2 to 20 mm in diameter. Free and independent movements, of great amplitude, of the balls 30 being sought to give a high expansion, a very low filling of the cage 31 by the balls 30 is sought.
  • the balls 30 do not form superimposed layers at rest.
  • They are 1 to 40 in number, with a diameter 2 to 10 times smaller than the diameter (or the dimensions transverse to the X-X axis) of the cage 31; more advantageously, from 4 to 8 times smaller than this diameter; and at best, about 5 times lower.
  • Figure 3 shows that the end 7 is attached to the front end of a barrel of a gun 32 held by the operator, the rear end of which is joined to the lance 21. The operator opens the lance 21 and triggers the projection of foam by pressing a trigger 35 of the gun 32.
  • Figure 4 illustrates a possible arrangement of the equipment on the frame 8, where there is still shown a spare tank used when the first (tank 1) has been emptied.
  • the device is devoid of any servitude, that is to say any supply from the outside, the operator can put it on or transport it without constraint in remote or inaccessible places. He seizes the lance 21 by the gun 32 and presses the trigger 35 when he is in front of the surface to be covered with foam.
  • the opening of the lance 21 allows the compressed air to flow through the second conduit 14. Part of the flow passes through the pneumatic pump 5, starts it up and serves to suck in an invariable flow, proportional to the flow of air passing through the pump 5, of the foaming solution out of the tank 1.
  • the pumped foaming solution and the main flow of compressed air, which is directed to the lance 21, come together at the junction 15, upstream of the mixer 6.
  • the flow rate of the foaming solution and that of the compressed air which mixes with it are proportional and therefore have an invariable ratio, determined by the physical characteristics of the fluids and of the device.
  • the foam is formed by the mixing of the air and the foaming solution, passing through the mixer 6, which is very effective in obtaining a high expansion foam, sought among other things for viscose foams.
  • Bottle 2 capacity of 31, starting pressure of 300 bar;
  • Main regulator 4 reduces the pressure to 7 bar
  • Second regulator 43 reduces the pressure to 4 bars
  • Rigid balls 30 from 1 to 40, from 2 to 20 mm in diameter;
  • Foaming solution water, with Glucopon 215UP [BASF] at 10g/l, and Xanthan Gum (G1253) [Sigma Aldrich] at 3g/l;
  • the foam holding time is at least 120 min.
  • the balls 30 could be replaced by another freely movable solid body in the cage 31, and their number could also be different, a single solid body being possible.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Fluid Mechanics (AREA)
  • Nozzles (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The invention relates to a foam-generating device that is easily transportable, free of fluid or power supply constraints, and capable of providing a foam such as a viscous foam having high, time-invariant expansion (low liquid fraction). The gas is collected under pressure from a cylinder (2), and a fixed fraction of its flow is used to drive a pneumatic pump (5) which draws in the foaming liquid. The foam is formed in a mixer (6) containing freely moving solids shortly before the ejection end (7) of the apparatus. The mixer (6) has high-mobility beads in a much larger cage and is suitable for producing the high-expansion foam. The invention can be used for the decontamination and depollution of large areas, buildings or indoor or outdoor structures.

Description

Description Description
Titre : DISPOSITIF AUTONOME DE GENERATION DE MOUSSE VISCOSEE Title: AUTONOMOUS VISCOUS FOAM GENERATION DEVICE
L'invention présente a trait à un dispositif autonome de génération de mousse viscosée. The present invention relates to an autonomous device for generating viscose foam.
Elle trouvera utilité notamment dans des travaux de décontamination ou de dépollution, dans lesquelles des mousses doivent être appliquées sur de vastes surfaces pouvant être fortement inclinées ou verticales, appartenant par exemple à des bâtiments, ou dans des volumes quasiment clos, éventuellement peu accessibles, et se maintenir sur ces surfaces pendant un temps assez long pour agir sur les produits polluants, sans couler ou se dégrader d'une autre manière. It will be useful in particular in decontamination or depollution work, in which foams must be applied to large surfaces which may be strongly inclined or vertical, belonging for example to buildings, or in almost closed volumes, possibly not easily accessible, and remain on these surfaces for a long enough time to act on the pollutants, without running or otherwise degrading.
On apprécie pour cela les mousses dites viscosées, c'est-à-dire enrichies en un agent gélifiant qui accroît la stabilité physique des mousses et les rend moins aptes à s'écouler sur des surfaces même très inclinées ou verticales. Ces deux caractéristiques permettent à la mousse d'agir pendant un temps suffisant sur la surface à traiter qu'elles couvrent. Des exemples sont donnés dans FR 2 841 802 Al. Un de leurs inconvénients est qu'elles sont difficiles à fabriquer à partir d'une solution moussante à l'état liquide, précisément à cause de la viscosité élevée de cette solution. Les appareils générateurs de mousses sont généralement prévus pour des mousses classiques, et ils ne conviennent pas aux mousses viscosées. Ils ne permettent en particulier pas de garantir de façon durable un foisonnement élevé de la mousse produite, c'est-à-dire une faible fraction liquide dans la mousse (par exemple inférieure à 10 % en volume) ; un foisonnement plus faible a notamment l'inconvénient de dépenser un excès des produits liquides à même volume de mousse, et de donner moins de petites bulles plus durables. We appreciate for this the so-called viscose foams, that is to say enriched with a gelling agent which increases the physical stability of the foams and makes them less able to flow on even very inclined or vertical surfaces. These two characteristics allow the foam to act for a sufficient time on the surface to be treated that they cover. Examples are given in FR 2 841 802 A1. One of their drawbacks is that they are difficult to manufacture from a foaming solution in the liquid state, precisely because of the high viscosity of this solution. Foam generating devices are generally intended for conventional foams, and they are not suitable for viscose foams. In particular, they do not make it possible to guarantee in a sustainable manner a high expansion of the foam produced, that is to say a low liquid fraction in the foam (for example less than 10% by volume); a lower expansion has in particular the disadvantage of spending an excess of liquid products with the same volume of foam, and of giving fewer small, longer lasting bubbles.
Un exemple d'un dispositif de génération de mousse est décrit dans WO 2013/067401 A2 ; ce dispositif est partiellement portatif, mais il est conçu pour des mousses ordinaires utilisées contre les incendies. An example of a foam generating device is described in WO 2013/067401 A2; this device is partially portable, but it is designed for ordinary foams used against fires.
US5623995 A, US2010/175897 Al et CN110251865 A décrivent d'autres dispositifs de génération et de projection de mousse. FR2889085 Al et W02019/011513 Al décrivent des mélangeurs des constituants de la mousse, aptes à fabriquer cette dernière dans des dispositifs de projection tels ceux des documents mentionnés plus haut. Ces mélangeurs comprennent des lits de corps solides composés de couches superposées ; les constituants de la mousse sont contraints de s'écouler à travers les lits, et ils se mélangent dans les interstices des corps solides en formant la mousse. Les lits compacts décrits dans ces documents sont néanmoins peu aptes à donner des mousses au foisonnement élevé. US5623995 A, US2010/175897 A1 and CN110251865 A describe other foam generating and spraying devices. FR2889085 Al and WO2019/011513 Al describe mixers of the constituents of the foam, capable of manufacturing the latter in projection devices such as those of the documents mentioned above. These mixers comprise beds of solid bodies composed of superposed layers; the constituents of the foam are forced to flow through the beds, and they mix in the interstices of the solid bodies forming the foam. The compact beds described in these documents are nevertheless not very suitable for giving high expansion foams.
Un objet de l'invention est de fabriquer des mousses, notamment des mousses spéciales à foisonnement élevé, de façon fiable, à un débit important, au moyen d'un générateur adapté et dont le fonctionnement est stable. An object of the invention is to manufacture foams, in particular special high-expansion foams, reliably, at a high rate, by means of a suitable generator whose operation is stable.
D'autres objets de l'invention sont : Other objects of the invention are:
- de pouvoir transporter l'appareil sans difficulté dans des endroits peu accessibles et dépourvus de toute source d'approvisionnement, par exemple en eau ou en électricité ; - to be able to transport the device without difficulty in places that are not easily accessible and have no source of supply, for example water or electricity;
-d'offrir certains avantages de sécurité à l'opérateur. -to offer certain safety advantages to the operator.
D'après une définition générale, l'invention est relative à un dispositif de génération de mousse, comprenant un réservoir d'un liquide moussant, une bouteille de gaz comprimé, un premier conduit sortant du réservoir et traversant une pompe pneumatique en étant connecté à des orifices d'aspiration et de refoulement de ladite pompe pneumatique, un deuxième conduit sortant de la bouteille et traversant un détendeur, le premier conduit et le deuxième conduit se joignant à une jonction ; un conduit de transport d'un mélange du liquide moussant et du gaz comprimé s'étendant entre la jonction et une extrémité (7) d'éjection de mousse ; un mélangeur du liquide moussant et du gaz comprimé, à une entrée duquel aboutissent le premier conduit et le deuxième conduit et dans lequel la mousse est formée, et situé sur le conduit de transport du mélange entre la jonction et l'extrémité d'éjection ; le deuxième conduit comprenant une bifurcation menant à un orifice de mise en marche de la pompe pneumatique ; caractérisé en ce que le mélangeur comprend une paroi cylindrique ouverte aux deux extrémités axiales et parcourue par le mélange entre lesdites extrémités axiales, une cage formée dans la paroi cylindrique, et au moins un corps solide libre de mouvement dans la cage, l'au moins un corps solide consistant en 1 à 40 billes, construites en matériaux rigides, et en ce que la cage fait 10 à 400 mm de longueur, 10 à 100 mm de diamètre, et les billes font 2 à 20 mm de diamètre. According to a general definition, the invention relates to a device for generating foam, comprising a reservoir of a foaming liquid, a cylinder of compressed gas, a first pipe leaving the reservoir and passing through a pneumatic pump while being connected to suction and discharge ports of said pneumatic pump, a second conduit exiting from the bottle and passing through a regulator, the first conduit and the second conduit joining at a junction; a conduit for transporting a mixture of the foaming liquid and the compressed gas extending between the junction and an end (7) for ejecting the foam; a mixer of the foaming liquid and the compressed gas, at an inlet of which the first conduit and the second conduit end and in which the foam is formed, and located on the conduit for transporting the mixture between the junction and the ejection end; the second conduit comprising a bifurcation leading to a starting port of the pneumatic pump; characterized in that the mixer comprises a cylindrical wall open at the two axial ends and through which the mixture passes between the said axial ends, a cage formed in the cylindrical wall, and at least one solid body free to move in the cage, the at least one solid body consisting of 1 to 40 balls, constructed of rigid materials, and in that the cage is 10 to 400 mm in length, 10 to 100 mm in diameter, and the balls are 2 to 20 mm in diameter.
Ce dispositif, où le gaz comprimé est utilisé à la fois pour fabriquer la mousse et aspirer le liquide moussant hors de son réservoir, permet de se passer du besoin d'une alimentation électrique du dispositif impliquant soit la servitude d'un approvisionnement extérieur par des câbles, soit une batterie lourde. Le débit du liquide aspiré, conditionné par l'énergie fournie à la pompe, est proportionnel à la pression du gaz comprimé, et le débit du gaz comprimé servant à fabriquer la mousse est aussi proportionnel à cette pression. La stabilité du foisonnement de la mousse, c'est-à-dire de la valeur de sa fraction liquide, est donc garantie sans aucun réglage. Le mélangeur intégré au dispositif est bien adapté pour produire une mousse ayant les qualités requises. Les billes étant en petit nombre dans la cage et de dimensions bien inférieures à celle-ci, n'y forment pas de couches superposées mais restent au contraire libres et accomplissent des mouvements indépendant et importants, aptes à donner un foisonnement élevé de la mousse. This device, where the compressed gas is used both to make the foam and to suck the foaming liquid out of its reservoir, makes it possible to dispense with the need for an electrical power supply to the device involving either the servitude of an external supply by cables, or a heavy battery. The flow rate of the liquid drawn in, conditioned by the energy supplied to the pump, is proportional to the pressure of the compressed gas, and the flow rate of the compressed gas used to produce the foam is also proportional to this pressure. The stability of the expansion of the foam, that is to say of the value of its liquid fraction, is therefore guaranteed without any adjustment. The mixer integrated into the device is well suited to produce a foam having the required qualities. Since the balls are few in number in the cage and of much smaller dimensions than the latter, they do not form superimposed layers there but on the contrary remain free and perform independent and significant movements, capable of giving a high expansion of the foam.
Selon divers perfectionnements optionnels de cette conception : According to various optional refinements of this design:
- le dispositif comprend un manomètre de mesure de pression du gaz comprimé dans la bouteille ; - the device comprises a manometer for measuring the pressure of the compressed gas in the bottle;
- le conduit de transport du mélange comprend une lance souple ; - the mixture transport conduit comprises a flexible lance;
- le dispositif comprend une manette de commande unique, disposée sur la lance, d'ouverture de la lance et d'éjection de la mousse ; - the device comprises a single control lever, arranged on the lance, for opening the lance and ejecting the foam;
- la cage est délimitée par deux grilles se succédant dans la paroi cylindrique ;- le dispositif est monté sur un châssis portatif ou un chariot roulant, et complètement indépendant, en service, d'approvisionnements extérieurs, notamment d'électricité ou de fluides. - the cage is delimited by two successive grids in the cylindrical wall; - the device is mounted on a portable frame or a rolling cart, and completely independent, in service, of external supplies, in particular electricity or fluids.
L'invention est bien adaptée à la génération de mousses contenant un agent gélifiant. L'invention sera maintenant décrite dans ses différents aspects, caractéristiques et avantages, au moyen des figures suivantes, qui en illustrent une réalisation particulière, données à titre purement illustratif : The invention is well suited to the generation of foams containing a gelling agent. The invention will now be described in its various aspects, characteristics and advantages, by means of the following figures, which illustrate a particular embodiment thereof, given for purely illustrative purposes:
- la Figure 1 est un schéma d'une réalisation de l'invention ; - la Figure 2 représente le mélangeur ; - Figure 1 is a diagram of an embodiment of the invention; - Figure 2 shows the mixer;
- la Figure 3 représente l'extrémité de la lance de projection ; - Figure 3 shows the end of the projection lance;
- la Figure 4 illustre un agencement concret de la réalisation. - Figure 4 illustrates a concrete arrangement of the embodiment.
Se reportant à la figure 1, l'appareil comprend un réservoir 1 de solution moussante à l'état liquide, une bouteille 2 d'air comprimé, un manomètre 3, un détendeur 4 principal, une pompe pneumatique 5, un mélangeur 6, une extrémité 7 d'éjection de mousse, et un châssis 8. Un premier conduit 11 relie un orifice de sortie du réservoir 1 à un orifice d'aspiration 12 de la pompe pneumatique 5 ; il ressort de la pompe pneumatique 5 par son orifice de refoulement 13, traverse le mélangeur 6 et aboutit à l'extrémité 7. Un deuxième conduit 14 relie un orifice de sortie de la bouteille 2 au détendeur 4 principal, puis conflue au premier conduit 11 à une jonction 15 réalisée entre l'orifice de refoulement de la pompe pneumatique 5 et le mélangeur 6. Une bifurcation 16 du deuxième conduit 14 aboutit à un orifice 17 de mise en mouvement du rotor de la pompe pneumatique 5 (via éventuellement un deuxième détendeur 43 pour régler indépendamment la pression à cet endroit). La bifurcation 16 quitte le deuxième conduit 14 juste en aval du détendeur 4 principal et transporte donc de l'air faiblement comprimé à pression constante (7 bars par exemple). Le manomètre 3 est relié par un conduit de prise de pression 20 au second conduit 14, en amont du détendeur 4 principal, et il permet donc de mesurer la pression du gaz à la sortie de la bouteille 2 et d'évaluer le remplissage de celle-ci. Le châssis 8 porte le réservoir 1, la bouteille 2, le détendeur 4 principal, la pompe pneumatique 5, le premier conduit 11 et le deuxième conduit 14. Comme le montre la figure 4, le châssis 8 peut être vertical et appartenir à un sac à dos porté par l'opérateur du dispositif ; le châssis 8 peut aussi être un chariot roulant, par exemple. L'extrémité 7 d'éjection de mousse n'est pas fixée au châssis 8, mais elle se trouve au bout d'une lance 21 souple, que tient l'opérateur. La lance 21 s'étend entre l'extrémité 7 d'une part, et la jonction 15 d'autre part. Referring to Figure 1, the device comprises a tank 1 of foaming solution in the liquid state, a bottle 2 of compressed air, a pressure gauge 3, a main regulator 4, a pneumatic pump 5, a mixer 6, a foam ejection end 7, and a frame 8. A first conduit 11 connects an outlet orifice of reservoir 1 to a suction orifice 12 of pneumatic pump 5; it emerges from the pneumatic pump 5 through its discharge orifice 13, passes through the mixer 6 and ends at the end 7. A second conduit 14 connects an outlet orifice of the bottle 2 to the main regulator 4, then joins the first conduit 11 at a junction 15 made between the discharge orifice of the pneumatic pump 5 and the mixer 6. A bifurcation 16 of the second conduit 14 leads to an orifice 17 for setting the rotor of the pneumatic pump 5 in motion (possibly via a second pressure reducer 43 to independently adjust the pressure there). The bifurcation 16 leaves the second conduit 14 just downstream of the main regulator 4 and therefore transports slightly compressed air at constant pressure (7 bars for example). The pressure gauge 3 is connected by a pressure tapping conduit 20 to the second conduit 14, upstream of the main regulator 4, and it therefore makes it possible to measure the pressure of the gas at the outlet of the bottle 2 and to evaluate the filling of that -this. The frame 8 carries the tank 1, the bottle 2, the main regulator 4, the pneumatic pump 5, the first pipe 11 and the second pipe 14. As shown in Figure 4, the frame 8 can be vertical and belong to a bag backpack carried by the operator of the device; the frame 8 can also be a trolley, for example. The foam ejection end 7 is not attached to the frame 8, but is located at the end of a flexible lance 21, held by the operator. The lance 21 extends between the end 7 on the one hand, and the junction 15 on the other hand.
Le mélangeur 6 est situé sur le trajet du mélange de liquide et d'air comprimé entre la jonction 15 et l'extrémité 7, et il est représenté à la figure 2. Il comprend deux grilles 28 planes se succédant dans le perçage 24 d'une paroi cylindrique et occupant toute sa section, deux joints d'étanchéité 29 auxquels les grilles 28 sont respectivement fixées et qui leur servent d'appui à la paroi du perçage 24, et des billes 30 sphériques et rigides libres de se mouvoir entre les grilles 28. Les joints d'étanchéité 29 servent à maintenir les grilles 28 en place et à former entre elles une cage 31, délimitée encore par la paroi du perçage 24, et dans laquelle les billes 30 sont retenues. Ils obligent aussi tous les fluides circulant dans le perçage 24 à passer par l'intérieur de la cage 31. The mixer 6 is located on the path of the mixture of liquid and compressed air between the junction 15 and the end 7, and it is represented in FIG. a cylindrical wall and occupying its entire section, two seals 29 to which the grids 28 are respectively fixed and which serve as their support for the wall of the bore 24, and spherical and rigid balls 30 free to move between the grids 28. The seals 29 serve to hold the grids 28 in place and to form between them a cage 31, further delimited by the wall of the bore 24, and in which the balls 30 are retained. They also force all the fluids circulating in the bore 24 to pass through the inside of the cage 31.
Ce genre de mélangeur comprenant des billes, ou plus généralement des corps solides, libres dans une cage traversée par les fluides préalablement mélangés s'est révélé très efficace pour produire des mousses dont le foisonnement est bien déterminé et éventuellement élevé, c'est-à-dire à faible fraction liquide. Il convient particulièrement à la fabrication de mousses viscosées. La cage 31 peut faire 10 à 400 mm de longueur, 10 à 100 mm de diamètre, et les billes 30 de 2 à 20 mm de diamètre. Des mouvements libres et indépendants, de grande amplitude, des billes 30 étant recherchées pour donner un foisonnement élevé, un très faible remplissage de la cage 31 par les billes 30 est recherché. Avantageusement, les billes 30 ne forment pas de couches superposées au repos. Elles sont au nombre de 1 à 40, d'un diamètre de 2 à 10 fois inférieur au diamètre (ou aux dimensions transversales à l'axe X-X) de la cage 31 ; plus avantageusement, de 4 à 8 fois inférieur à ce diamètre ; et au mieux, environ 5 fois inférieur. This type of mixer comprising balls, or more generally solid bodies, free in a cage through which the previously mixed fluids pass has proven to be very effective in producing foams whose expansion is well determined and possibly high, i.e. ie low liquid fraction. It is particularly suitable for the manufacture of viscose foams. The cage 31 can be 10 to 400 mm in length, 10 to 100 mm in diameter, and the balls 30 from 2 to 20 mm in diameter. Free and independent movements, of great amplitude, of the balls 30 being sought to give a high expansion, a very low filling of the cage 31 by the balls 30 is sought. Advantageously, the balls 30 do not form superimposed layers at rest. They are 1 to 40 in number, with a diameter 2 to 10 times smaller than the diameter (or the dimensions transverse to the X-X axis) of the cage 31; more advantageously, from 4 to 8 times smaller than this diameter; and at best, about 5 times lower.
La figure 3 montre que l'extrémité 7 est fixée à l'extrémité avant d'un canon d'un pistolet 32 tenu par l'opérateur, dont l'extrémité arrière est jointe à la lance 21. L'opérateur ouvre la lance 21 et déclenche la projection de mousse en pressant sur une gâchette 35 du pistolet 32. La figure 4 illustre une disposition possible des équipements sur le châssis 8, où on représente encore un réservoir de rechange utilisé quand le premier (le réservoir 1) a été vidé. Figure 3 shows that the end 7 is attached to the front end of a barrel of a gun 32 held by the operator, the rear end of which is joined to the lance 21. The operator opens the lance 21 and triggers the projection of foam by pressing a trigger 35 of the gun 32. Figure 4 illustrates a possible arrangement of the equipment on the frame 8, where there is still shown a spare tank used when the first (tank 1) has been emptied.
Voici comment le fonctionnement du dispositif et ses avantages peuvent être décrits. Comme le dispositif est dépourvu de toute servitude, c'est-à-dire d'approvisionnement quelconque à partir de l'extérieur, l'opérateur peut le revêtir ou le transporter sans contrainte dans des lieux écartés ou peu accessibles. Il saisit la lance 21 par le pistolet 32 et appuie sur la gâchette 35 quand il est devant la surface à couvrir de mousse. L'ouverture de la lance 21 permet à l'air comprimé de s'écouler par le deuxième conduit 14. Une partie du débit traverse la pompe pneumatique 5, la met en marche et sert à aspirer un débit invariable, proportionnel au débit d'air traversant la pompe 5, de la solution moussante hors du réservoir 1. La solution moussante pompée et le débit principal d'air comprimé, qui est dirigé vers la lance 21, confluent à la jonction 15, en amont du mélangeur 6. Ici aussi, le débit de la solution moussante et celui de l'air comprimé qui se mélange à elle sont proportionnels et ont donc un rapport invariable, déterminé par les caractéristiques physiques des fluides et du dispositif. La mousse se forme par le mélange de l'air et de la solution moussante, en traversant le mélangeur 6, qui est très efficace pour obtenir une mousse à fort foisonnement, recherchée entre autres pour les mousses viscosées. Here is how the operation of the device and its advantages can be described. As the device is devoid of any servitude, that is to say any supply from the outside, the operator can put it on or transport it without constraint in remote or inaccessible places. He seizes the lance 21 by the gun 32 and presses the trigger 35 when he is in front of the surface to be covered with foam. The opening of the lance 21 allows the compressed air to flow through the second conduit 14. Part of the flow passes through the pneumatic pump 5, starts it up and serves to suck in an invariable flow, proportional to the flow of air passing through the pump 5, of the foaming solution out of the tank 1. The pumped foaming solution and the main flow of compressed air, which is directed to the lance 21, come together at the junction 15, upstream of the mixer 6. Here too , the flow rate of the foaming solution and that of the compressed air which mixes with it are proportional and therefore have an invariable ratio, determined by the physical characteristics of the fluids and of the device. The foam is formed by the mixing of the air and the foaming solution, passing through the mixer 6, which is very effective in obtaining a high expansion foam, sought among other things for viscose foams.
Quelques indications supplémentaires, de nature concrète, sont données ci-dessous pour décrire plus complètement un exemple particulier de cette réalisation du dispositif et ses performances. A few additional indications, of a concrete nature, are given below to more fully describe a particular example of this embodiment of the device and its performance.
Bouteille 2 : capacité de 31, pression de départ de 300 bars ; Bottle 2: capacity of 31, starting pressure of 300 bar;
Réservoirs 1 ou : capacité de 81 chacun ; Tanks 1 or: capacity of 81 each;
Détendeur 4 principal : réduit la pression à 7 bars ; Main regulator 4: reduces the pressure to 7 bar;
Deuxième détendeur 43 : réduit la pression à 4 bars ; Second regulator 43: reduces the pressure to 4 bars;
Mélangeur 6 : diamètre et longueur de la cage 31 : de 10 à 100 mm et de 10 à 400 mm; Mixer 6: diameter and length of the cage 31: from 10 to 100 mm and from 10 to 400 mm;
Billes rigides 30 : de 1 à 40, de 2 à 20 mm de diamètre ; Solution moussante : eau, avec Glucopon 215UP [BASF] à 10g/l, et Xanthan Gum (G1253) [Sigma Aldrich] à 3g/l ; Rigid balls 30: from 1 to 40, from 2 to 20 mm in diameter; Foaming solution: water, with Glucopon 215UP [BASF] at 10g/l, and Xanthan Gum (G1253) [Sigma Aldrich] at 3g/l;
Couche projetée sur surface verticale: 10m2, 1cm d'épaisseur, en 120s ; vitesse de glissement inférieure à lcm/min. Dans le cas où la mousse est utilisée en remplissage d'un volume, le temps de maintien de la mousse est de 120min au moins. Layer projected on vertical surface: 10m 2 , 1cm thick, in 120s; sliding speed less than lcm/min. In the case where the foam is used to fill a volume, the foam holding time is at least 120 min.
Foisonnement de la mousse obtenue : environ 16,7 (environ 100 litres de mousse produits pour 6 litres consommés de la solution moussante). Expansion of the foam obtained: approximately 16.7 (approximately 100 liters of foam produced for 6 liters of the foaming solution consumed).
Les billes 30 pourraient être remplacées par un autre corps solide librement mobile dans la cage 31, et leur nombre pourrait être aussi être différent, un seul corps solide étant possible. The balls 30 could be replaced by another freely movable solid body in the cage 31, and their number could also be different, a single solid body being possible.

Claims

Revendications Claims
1. Dispositif de génération de mousse, comprenant un réservoir (1) d'un liquide moussant, une bouteille (2) de gaz comprimé, un premier conduit (11) sortant du réservoir et traversant une pompe pneumatique (5) en étant connecté à des orifices d'aspiration (12) et de refoulement (13) de ladite pompe pneumatique, un deuxième conduit (14) sortant de la bouteille (2) et traversant un détendeur (4), le premier conduit et le deuxième conduit se joignant à une jonction (15) ; un conduit (21) de transport d'un mélange du liquide moussant et du gaz comprimé s'étendant entre la jonction (15) et une extrémité (7) d'éjection de mousse ; un mélangeur (6) du liquide moussant et du gaz comprimé, dans lequel la mousse est formée, et situé sur le conduit (21) de transport du mélange entre la jonction (15) et l'extrémité d'éjection (7) ; le deuxième conduit comprenant une bifurcation (16) menant à un orifice (17) de mise en marche de la pompe pneumatique, caractérisé en ce que le mélangeur (6) comprend une paroi cylindrique ouverte aux deux extrémités axiales et parcourue par le mélange entre lesdites extrémités axiales, une cage (31) formée dans la paroi cylindrique, et au moins un corps solide (30) libre de mouvement dans la cage, l'au moins un corps solide consistant en 1 à 40 billes, construites en matériaux rigides, et en ce que la cage fait 10 à 400 mm de longueur, 10 à 100 mm de diamètre, et les billes font 2 à 20 mm de diamètre. 1. Device for generating foam, comprising a tank (1) of a foaming liquid, a cylinder (2) of compressed gas, a first pipe (11) leaving the tank and passing through a pneumatic pump (5) while being connected to suction (12) and discharge (13) orifices of said pneumatic pump, a second conduit (14) exiting from the cylinder (2) and passing through a regulator (4), the first conduit and the second conduit joining a junction (15); a pipe (21) for transporting a mixture of the foaming liquid and the compressed gas extending between the junction (15) and a foam ejection end (7); a mixer (6) of the foaming liquid and the compressed gas, in which the foam is formed, and located on the conduit (21) for transporting the mixture between the junction (15) and the ejection end (7); the second conduit comprising a bifurcation (16) leading to an orifice (17) for starting the pneumatic pump, characterized in that the mixer (6) comprises a cylindrical wall open at the two axial ends and through which the mixture passes between the said axial ends, a cage (31) formed in the cylindrical wall, and at least one solid body (30) free to move in the cage, the at least one solid body consisting of 1 to 40 balls, constructed of rigid materials, and in that the cage is 10 to 400 mm in length, 10 to 100 mm in diameter, and the balls are 2 to 20 mm in diameter.
2. Dispositif de génération de mousse selon la revendication 1, caractérisé en ce qu'il comprend un manomètre (3) de mesure de pression du gaz comprimé dans la bouteille (2). 2. Device for generating foam according to claim 1, characterized in that it comprises a manometer (3) for measuring the pressure of the compressed gas in the bottle (2).
3. Dispositif de génération de mousse selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que le conduit (21) de transport du mélange comprend une lance souple. 3. Device for generating foam according to any one of claims 1 or 2, characterized in that the conduit (21) for transporting the mixture comprises a flexible lance.
4. Dispositif de génération de mousse selon la revendication 3, caractérisé en ce qu'il comprend une manette (35) de commande unique, disposée sur la lance (21), d'ouverture de la lance et d'éjection de la mousse. 4. Device for generating foam according to claim 3, characterized in that it comprises a single control lever (35), arranged on the lance (21), for opening the lance and ejecting the foam.
5. Dispositif de génération de mousse selon l'une quelconque des générations 1 à 4, caractérisé en ce que la cage est délimitée par deux grilles (28) se succédant dans la paroi cylindrique. 5. Device for generating foam according to any one of generations 1 to 4, characterized in that the cage is delimited by two grids (28) succeeding each other in the cylindrical wall.
6. Dispositif de génération de mousse selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'il est monté sur un châssis (8) portatif, et complètement indépendant, en service, d'approvisionnements extérieurs, notamment d'électricité ou de fluides. 6. Device for generating foam according to any one of claims 1 to 5, characterized in that it is mounted on a portable frame (8), and completely independent, in service, of external supplies, in particular electricity. or fluids.
7. Application d'un dispositif selon l'une quelconque des revendications précédentes à la fabrication et à la projection sur une surface d'une mousse contenant un agent gélifiant. 7. Application of a device according to any one of the preceding claims to the manufacture and spraying onto a surface of a foam containing a gelling agent.
EP22741339.0A 2021-06-16 2022-06-14 Self-contained device for generating a viscous foam Pending EP4355493A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2106378A FR3124097A1 (en) 2021-06-16 2021-06-16 AUTONOMOUS VISCOUS FOAM GENERATION DEVICE
PCT/FR2022/051139 WO2022263765A1 (en) 2021-06-16 2022-06-14 Self-contained device for generating a viscous foam

Publications (1)

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EP4355493A1 true EP4355493A1 (en) 2024-04-24

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Application Number Title Priority Date Filing Date
EP22741339.0A Pending EP4355493A1 (en) 2021-06-16 2022-06-14 Self-contained device for generating a viscous foam

Country Status (6)

Country Link
US (1) US20240286093A1 (en)
EP (1) EP4355493A1 (en)
CA (1) CA3220972A1 (en)
FR (1) FR3124097A1 (en)
IL (1) IL308904A (en)
WO (1) WO2022263765A1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5623995A (en) * 1995-05-24 1997-04-29 Intelagard, Inc. Fire suppressant foam generation apparatus
FR2841802B1 (en) 2002-07-08 2005-03-04 Commissariat Energie Atomique COMPOSITION, FOAM AND METHOD FOR DECONTAMINATING SURFACES
FR2889085B1 (en) * 2005-07-28 2007-09-21 Chabbert Chimie Sarl MIXER DEVICE FOR FOAM GENERATING PURPOSES, IN PARTICULAR FOR REDUCING DUST EMISSION IN AIR
US20100175897A1 (en) * 2009-01-13 2010-07-15 Stephen Douglas Crump Self-sustaining compressed air foam system
US20130112773A1 (en) 2011-11-03 2013-05-09 Intelgard, Inc. Compressed air-driven foam generator system in a backpack form factor
DE102017115645A1 (en) * 2017-07-12 2019-01-17 Washtec Holding Gmbh Foam generating device for a vehicle treatment device
CN110251865B (en) * 2019-07-20 2024-07-23 惠州市恒钛机械自动化有限公司 Backpack type multifunctional security fire extinguishing device

Also Published As

Publication number Publication date
IL308904A (en) 2024-01-01
US20240286093A1 (en) 2024-08-29
FR3124097A1 (en) 2022-12-23
WO2022263765A1 (en) 2022-12-22
CA3220972A1 (en) 2022-12-22

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