EP2205325B1 - Fluidausstossvorrichtung mit verbesserter dichtheit - Google Patents

Fluidausstossvorrichtung mit verbesserter dichtheit Download PDF

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Publication number
EP2205325B1
EP2205325B1 EP20080845284 EP08845284A EP2205325B1 EP 2205325 B1 EP2205325 B1 EP 2205325B1 EP 20080845284 EP20080845284 EP 20080845284 EP 08845284 A EP08845284 A EP 08845284A EP 2205325 B1 EP2205325 B1 EP 2205325B1
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EP
European Patent Office
Prior art keywords
fluid
chamber
reservoir
piston
pressure
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.)
Active
Application number
EP20080845284
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English (en)
French (fr)
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EP2205325A1 (de
Inventor
Christian Fabre
Alain Bignolais
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.)
Airbus Operations SAS
Original Assignee
Airbus Operations SAS
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
Priority claimed from FR0758697A external-priority patent/FR2922972B1/fr
Priority claimed from FR0801687A external-priority patent/FR2929126B1/fr
Priority claimed from FR0805467A external-priority patent/FR2936715B1/fr
Application filed by Airbus Operations SAS filed Critical Airbus Operations SAS
Publication of EP2205325A1 publication Critical patent/EP2205325A1/de
Application granted granted Critical
Publication of EP2205325B1 publication Critical patent/EP2205325B1/de
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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C35/00—Permanently-installed equipment
    • A62C35/02—Permanently-installed equipment with containers for delivering the extinguishing substance
    • A62C35/023—Permanently-installed equipment with containers for delivering the extinguishing substance the extinguishing material being expelled by compressed gas, taken from storage tanks, or by generating a pressure gas
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C13/00—Portable extinguishers which are permanently pressurised or pressurised immediately before use
    • A62C13/66—Portable extinguishers which are permanently pressurised or pressurised immediately before use with extinguishing material and pressure gas being stored in separate containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/60—Contents and propellant separated
    • B65D83/64—Contents and propellant separated by piston
    • B65D83/643—Contents and propellant separated by piston the propellant being generated by a chemical or electrochemical reaction
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/07—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles
    • A62C3/08—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles in aircraft
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2931—Diverse fluid containing pressure systems
    • Y10T137/2937—Gas pressure discharge of liquids feed traps [e.g., to boiler]

Definitions

  • the present invention relates to a fluid ejection device, in particular a fire extinguisher or an emergency hydraulic generator used in an aircraft.
  • fire extinguisher extinguishers are classified into two broad categories.
  • the first category concerns permanent pressure devices in which a gas ensures the permanent pressurization of the extinguishing agent within a single bottle serving as a reservoir; the extinguishing agent is released by a valve at the outlet of said bottle.
  • a propellant is released only when the extinguisher is put into service and releases the extinguishing agent, which is therefore not stored under pressure.
  • extinguisher of the first type it is possible to consider extinguishers currently used to extinguish an aircraft engine fire. These devices not only make it possible to extinguish the fire, but also prevent any extension of said fire.
  • the extinguishing agent is contained in a bottle, most of the time spherical, pressurized by an inert gas; one or more distribution lines, connected to said bottle, allow the distribution of the agent to the areas to be protected.
  • a calibrated seal closes off each distribution pipe.
  • a pressure sensor is also installed to continuously check the pressurization of the bottle. When a fire is detected, a pyrotechnic detonator is triggered. The resulting shock wave makes it possible to pierce the sealing cap, which causes the bottle to be emptied and the extinguishing agent to be evacuated under the effect of the pressure contained in the bottle towards the areas to be protected, via the pipes.
  • a major disadvantage of this type of pressurized extinguishers is their sensitivity to micro-leaks, which subjects them to severe conditions of monitoring, verification and maintenance.
  • the extinguishing agent does not completely fill the bottle since it must be able to contain the pressurizing gas.
  • second category extinguishers For second category extinguishers, they use a separate pressurizing device. These fire-fighting devices are generally equipped with a first compressed gas tank and a second tank for the extinguishing agent. When the apparatus is used, the compressed gas contained in the first tank is communicated through an orifice with the second tank of extinguishing agent for pressurizing the bottle containing the agent. extinguisher. When the extinguishing agent is pressurized, it is ejected to fight the fire, as for appliances of the first category of fire extinguisher.
  • the first compressed gas reservoir may be replaced by a gas generator, as described in the document EP1552859 .
  • This type of extinguisher may comprise a separation means, for example a membrane or a piston, placed in the reservoir so as to define a first chamber called a pressurization chamber, and a second chamber containing the extinguishing agent.
  • the purpose of this means of separation is to limit heat transfer between the gas generated and the extinguishing agent, as described in document EP1819403 filed in the name of the plaintiff. Indeed, in the absence of thermal insulation, the extinguishing agent can quickly absorb the calories of the gas generated and thus reduce the ejection efficiency of the extinguishing agent.
  • one solution may be to make the fire extinguisher particularly secure, for example with large wall thicknesses. This solution leads to an increase in the overall weight of the extinguisher, which is detrimental to the performance of the aircraft.
  • Another solution may be to move the fire extinguisher sufficiently away from the areas in question.
  • this distance requires the use of a greater length of distribution line between the fire extinguisher and said zones, which increases the linear pressure drop in the pipe and reduces the ejection efficiency.
  • the large amount of driving required is also penalizing.
  • a fluid ejection device for fire fighting usually includes, as shown in FIG. figure 1 , a pressure tank A1 connected to a distribution circuit A4 for the supply of the fluid to the extinction point A5.
  • the reservoir is connected to the distribution circuit A4 via a valve A2 remotely controlled by any suitable device A6.
  • the opening of the valve A2 causes the pressure tank A1 to be emptied into the distribution circuits A4 towards the extinction point A5.
  • it is desirable that the tanks are located as close as possible to the extinction point so as to reduce the length of the distribution circuit and thus accelerate the transfer of the fluid to the extinction point by limiting the losses of charges.
  • a first pressure vessel is emptied by opening its connection valve A2 and the valve is closed and the second pressure tank is emptied by opening its connection valve which is then closed at the end of draining and so on.
  • the closing of each valve at the end of emptying is necessary in order to prevent the fluid ejected from a tank whose valve has been subsequently opened from filling the previously emptied tank (s) instead of towards the point of extinction. .
  • This seal plays the role of the valve.
  • the differential pressure applied to the cap, the distribution circuit being empty and at atmospheric pressure while the pressure increases in the tank, causes the tearing thereof, thus allowing the discharge of the fluid in the distribution circuit A4 to the extinction point A5.
  • This device is more reliable because it does not include moving parts at the valve, which parts must be sealed and ensure operation, including the absence of seizure, over time. On the other hand, once the cap is pierced, it can no longer ensure the closure of the tank connection with the distribution circuit.
  • valves A3 allow the fluid to pass only in one direction of flow (direction of the arrow figure 1 ). They thus prevent, during successive trips valve openings for emptying other tanks connected to the same distribution circuit, the fluid to fill the previously emptied tanks.
  • at least (N-1) A3 flaps must be installed on the circuit.
  • valves create pressure losses on the circuit and must also be monitored regularly to ensure the ability to operate. Indeed, the dispensing circuit A4 being empty outside the operation of the device, that is to say for periods of up to years, such valves may be subject to seizures caused by condensation that may occur in such circuits, particularly when the device is installed in an aircraft in a non-pressurized zone and therefore undergoes variations in temperature and pressure over a wide range during each flight.
  • the device for ejecting a fluid comprises a reservoir containing the fluid intended to be ejected, an end of said reservoir comprising controllable shut-off means, such as a valve, capable of the fluid in communication with the outside of the tank so as to cause its flow.
  • controllable shut-off means such as a valve
  • the fluid is thus stored under pressure in the reservoir.
  • the reservoir is connected to a distribution circuit via the valve, the opening thereof causing the ejection of the fluid into the distribution circuit.
  • the fluid is not stored under pressure in the tank.
  • it is necessary to increase the pressure in the tank before opening the valve to put in communication with the distribution circuit.
  • This effect is obtained either by putting the inside of the tank directly in communication with a fluid under pressure, for example with compressed air, or by compressing the fluid intended to be ejected via a separating element located at inside the tank.
  • a separating element may be constituted by a membrane or a piston which separates the reservoir in a sealed manner into two chambers, one of them containing the fluid intended to be ejected.
  • the volume of the reservoir being fixed, the pressurization of the fluid to be ejected and its ejection out of the reservoir are done by increasing the volume of the chamber not containing the fluid.
  • Such volume variation is achieved by moving the separator element either by a purely mechanical device or by increasing the pressure in the chamber not containing the fluid to be ejected. This increase in pressure is obtained by injecting into said chamber, called a pressurization chamber, a fluid under pressure.
  • any type of fluid can be used without risk that it mixes with the fluid to be ejected.
  • it may be compressed air or nitrogen.
  • the fluid injected into the pressurization chamber is generated by a pyrotechnic gas generator, and, according to a particularly advantageous embodiment of the prior art, said pyrotechnic generator is located directly in the reservoir, inside the chamber. pressurization.
  • controllable closure means of the chamber containing the fluid to be ejected may take the form of a cap which breaks for a given pressure of said fluid.
  • a compact device is obtained, comprising all the means for triggering the ejection of the fluid.
  • the separator element thermally isolates the pressurizing chamber of the fluid to be ejected.
  • the fluid to be ejected is for example a liquid phase extinguishing agent.
  • This type of fluid can have a very high heat capacity and the separator element prevents the pyrotechnic reaction generating the pressurization gas is slowed down by the absorption of heat by the extinguishing agent.
  • the one using a substantially cylindrical reservoir separated into two chambers by a piston is the most efficient in terms of fluid ejection, that is to say that this mode embodiment maximizes the ratio between the volume of fluid actually discharged into the distribution circuit and the volume of fluid initially contained in the reservoir.
  • the pressure both in the pressurization chamber and in the chamber containing the fluid to be ejected, is high at the beginning of trigger and goes through a maximum at the time of rupture of the lid. It then decreases to reach a value close to the atmospheric pressure at the end of the discharge.
  • Such a device is for single use.
  • this fluid can evaporate.
  • the fluid thus evaporated is lost, thereby decreasing the amount of fluid that can be ejected.
  • the pressurizing chamber is leakproof vis-à-vis the outside, then the accumulation of this fluid in it reduces all the efficiency of the pyrotechnic reaction and therefore that of the ejection of the fluid.
  • the pressurizing chamber is in communication with the outside, condensation phenomena can occur there.
  • the water thus introduced into this room may, at the long, mix with the fluid to eject which it may degrade the characteristics of use.
  • the first phase of the ejection remains a critical phase because of the rapid pressure changes that occur during this phase.
  • the seal must be kept under these pressure conditions as well.
  • the invention proposes a device for ejecting a fluid according to the subject of claim 1.
  • the sock is able to seal between the pressurizing chamber and the walls of the cylinder in a constant manner between two longitudinal positions of the separating element. This makes it possible to maintain the seal during movements of the piston generated in particular by the thermal expansion of the fluid to be ejected, as well as during at least part of the first two phases of the discharge.
  • said sock is made of a flexible material expandable diametrically.
  • the increase in pressure in the pressurizing chamber causes the expansion of the sock, plating against the walls of the tank.
  • the sock therefore continues to seal between both chambers even in the presence of higher pressure. This effect makes it possible to secure the operation of the device even if the sealing means between the piston and the walls of the tank have slightly deteriorated in time and are no longer able to ensure a perfect seal under pressure, so particularly at the beginning of ejection just before and immediately after opening the lid.
  • the pressure of the fluid to be ejected is no longer a function of the characteristic and the pressure drops of the distribution circuit.
  • the efficiency of the device depends on the ability of the piston to slide quickly. It is therefore advantageous that during this phase the piston is not braked in its translation by the sock. Sealing of the sock is broken beyond a defined longitudinal position of the separator element. This also allows the distribution circuit to communicate with the pressurizing gases in order to purge it during the fifth phase of the discharge.
  • the continuity of the seal of the sock between the two defined longitudinal positions of the piston can be provided by the longitudinal elastic extension of said sock particularly if it is made of a flexible material.
  • this longitudinal extension is facilitated when the sock comprises at least one fold able to unfold under the effect the translation of the separator element.
  • This feature makes it possible to use for the formation of the sock a thicker material and therefore more resistant to pressure and, where appropriate, to temperature during the first two phases of the discharge.
  • This embodiment is therefore particularly advantageous when the device comprises a pyrotechnic gas generator in communication with the pressurization chamber, the triggering of which causes the discharge.
  • such a device comprises a device able to put the pressurization chamber in communication with the outside so as to maintain a constant pressure with respect to slow variations in volume and to close said chamber with respect to variations pressure and volume generated by the activation of the pyrotechnic gas generator.
  • This feature keeps the ejection device without internal overpressure outside the operating phases, which improves its safety and reduces the weight and bulk. Indeed, not being subjected permanently to an internal pressure, the device can be built with less thick walls without degrading its reliability vis-à-vis the risk of bursting.
  • the ejection device of a fluid comprises means able to put in communication the gases generated by the pyrotechnic reaction with the fluid distribution circuit at the end of ejection of the fluid.
  • This makes it possible on the one hand to purge the circuit and thus to take advantage of all the quantity of the extinguishing agent and also to obtain a two-phase discharge: the first consisting in discharging a large quantity of extinguishing agent on the fire, the second consisting in blowing on the fire zone an aerosol consisting of the gas generated by the pyrotechnic reaction and extinguishing agent.
  • the ejection of the aerosol constituted by the pressurizing gas makes it possible on the one hand to usefully participate in the extinction phase by the very nature of the (inert) gas, and on the other hand to distribute the agent wherever it is needed in the fire zone to be treated.
  • a device may comprise means able to prevent any return of gas or fluid from the distribution circuit in the tank after complete discharge thereof. This makes it possible to increase the efficiency of the device and in particular to maximize the ratio between the fluid effectively dumped and the fluid initially contained in the reservoir, it also allows to couple in parallel on the same distribution circuit several reservoirs of this type to have a greater amount of fluid to be ejected. In this case, the different tanks are triggered sequentially without risk that the discharge of one of the tanks will fill another, already emptied, instead of pouring to the point.
  • the fluid to be ejected is advantageously a quenching agent of the fluoroketone type.
  • such a device can also be used as a last-resort hydraulic generator, in this case the ejected fluid is a hydraulic oil that can thus ensure the pressurization as a last resort of any hydraulic circuit.
  • Such devices are more particularly adapted, because of their compactness, their reliability and their reduced weight and their low sensitivity to variations in pressure and temperature for use in aircraft.
  • the Figures 2 to 8 represent a fluid ejection device.
  • the fluid ejection device comprises as main element a reservoir 1 containing the fluid 14 to be ejected, consisting of a hollow cylindrical body 2 and sealingly closed at both ends by a first end portion 3 and a second portion of end 4.
  • the cylindrical body 2 may have a circular section, elliptical, oblong, or any other form of the same type.
  • the invention applies more particularly to a fluid 14 in the liquid phase. Nevertheless, the fluid 14 may also be in the form of powders, pasty fluids or suspensions.
  • the tank 1 comprises one or more ejection orifices 16A, which can be connected to dispensing means (not shown) to allow the ejection of the fluid 14 and its routing to a specific area.
  • the ejection orifices 16A are located in the second end portion 4 of the cylinder or near this end portion.
  • each ejection orifice 16A is sealingly closed by a dispensing cap 16 in order to keep the fluid in the tank 1 as long as its action is not solicited.
  • the dispensing cap 16 may for example be a tared operculum, that is to say a membrane which breaks or opens as soon as the pressure at tank 1 reaches a certain threshold.
  • the dispensing cap may also be a valve, advantageously controlled remotely.
  • Other closure devices are known for example from W0 93/25950 or US-A-4,877,051 , and commercially available.
  • the ejection device comprises means for generating a gas under pressure.
  • the means for generating a gas under pressure are connected to the tank 1 via communication means.
  • the communication means between the tank 1 and the means for generating a pressurized gas open into the tank 1 in a manner opposite to the ejection orifice 16A, that is to say in the first part of the tank. end 3 or near this end portion.
  • the means for generating a gas under pressure may consist of one or more pressurized gas tanks.
  • a valve in the communication means makes it possible, for example, to isolate the pressurized gas tank from the tank 1 as long as it is not used.
  • the generator 7 is located inside the tank 1. It consists of a combustion chamber 8 provided with an ignition device 9, and containing a suitable quantity of an energetic or pyrotechnic material. This material may be in the solid state, for example in the form of beads or pellets, or in block form of studied form.
  • the gases generated by the combustion of the energetic or pyrotechnic material are directed towards the tank 1 via outlet orifices of the enclosure 8.
  • a diffuser 11 placed around the combustion chamber 8 allows a better distribution of the gas generated by the gas generator 7 within the first chamber A, which minimizes the thermal impacts located on the surface of the first chamber A .
  • said fluid 14 can absorb a large amount of heat energy from the generated gas. This is particularly the case of NOVEC® 1230 marketed by the company 3M.
  • the heat absorbed by such a fluid 14 causes a drop in temperature of the generated gas, which produces a decrease in the pressure exerted by the gas generated in the reservoir 1 on the fluid 14 to be ejected.
  • This reduction in pressure applied to the fluid 14 to be ejected leads to a lower ejection rate of the fluid 14, which thus reduces the efficiency of the device according to the invention.
  • a separation means 5 is necessary.
  • the separating means 5 is located between the first end portion 3 and said fluid 14 so as to form in a sealed manner on the one hand a first chamber A located between the separating means 5 and the first end portion 3 called pressurizing chamber, and secondly a second chamber B containing said fluid 14 located between the separation means 5 and the second end portion 4.
  • the separating means 5 may comprise a central portion 5C extending substantially in the radial direction of the tank 1, and a lateral portion 5L extending substantially in the axial direction of the tank 1.
  • the lateral portion 5L is connected to the central portion 5C at the circumference of Part 5C.
  • Parts 5C and 5L are rigid.
  • the central portion 5C of the separation means 5 comprises a surface 5A located in the first enclosure A and a surface 5B located in the second enclosure B.
  • the separating means 5 is movable in the axial direction of the tank 1 so as to have a piston effect: in the ejection phase, the surface 5A undergoes the pressure of the generated gas, which pressure is communicated to the fluid 14 by the surface 5B of the central portion 5C so as to eject the fluid 14 from the tank 1.
  • the separating means 5 is of thermally insulating material, for example of plastic material, or of any rigid material, dressed with insulating material, such as an elastomer. So the Fluid 14 can not absorb the energy of the generated gas, which optimizes the ejection efficiency of the device according to the invention.
  • the separating means 5 may comprise seals or sealing segments 6, placed in circumferential recesses of the lateral part 5L facing the inner wall 2I of the cylindrical body 2.
  • the sealing segments 6, by rubbing on the wall inside 2I of the cylindrical body 2, allow to prohibit any mass transfer between the speakers A and B.
  • the separation means 5 also has the advantage of avoiding any mixing and dilution of the fluid 14 in the generated gas which would reduce the efficiency of the ejection device.
  • This undilution of the fluid 14 in the gas generated is particularly important for certain applications such as fire engine fire extinguishing in aeronautics where, for regulatory reasons, it is necessary to ensure a minimum concentration of extinguishing agent in a fire zone considered for a period of time. given, as described in the document EP1552859 filed in the name of the plaintiff. Indeed, these fire zones are most often ventilated by a significant flow of renewal air.
  • the separating means comprises a thermal insulation zone 5I extending substantially in the radial direction of the separation means 5.
  • This thermal insulation zone 5I may be a closed recess located inside the central portion 5C between the surfaces 5A and 5B of the separation means 5, as illustrated by FIG. figure 3 .
  • Other solutions are possible, such as the covering of a surface 5A or 5B, or both surfaces 5A and 5B, by a plate of thermally insulating material and of suitable thickness. The thermal insulation between the first enclosure A and the second enclosure B is thus improved.
  • the figure 4 shows a pressure control means 12 fitted to the fluid ejection device.
  • the ejection device may be equipped with a plurality of pressure control means 12.
  • the figure 4 shows a non-limiting example of pressure control means, here corresponding to a valve. However, other means may be suitable, such as a valve or a valve.
  • the pressure control means 12, hereinafter referred to as a valve is arranged in the first end portion 3 so as to ensure communication between the first enclosure A and the external environment of the reservoir.
  • the valve 12 is able to adopt an open configuration in the absence of gas generated in the tank 1 so as to vent these first enclosure A and a closed configuration in the presence of gas generated in the first chamber. tank 1 so as to seal said first chamber A, regardless of the axial position of the separation means 5.
  • the valve 12 is designed to close tightly under the pressure of the gas generated in the first enclosure A.
  • a slow variation in pressure between the first chamber A and the external environment of the tank 1 through the valve 12 is not able to operate the closing of the valve 12.
  • This type of slow variation is presented during the variation of the atmospheric pressure outside the ejection device according to the invention, for example because of the altitude variation of the aircraft. It can also occur during the displacement of the separation means 5 as a function of the volume variation of the fluid 14, and therefore of the pressure variation in the first enclosure A due to the displacement of the separation means 5.
  • the fluid 14 may have a volume variation with respect to a reference volume defined for a given temperature, for example + 20 ° C. In the case of high temperatures, the fluid 14 has a volume expansion and then exerts a pressure on the separation means 5 in the direction of the first end portion 3. The separation means 5 then moves in the direction of the first end part 3.
  • any displacement of the separation means 5 due to the volume variation of the fluid 14 changes the volume of the first chamber A and therefore the resident pressure inside the chamber A.
  • the venting through the valve 12 of the first chamber A ensures that none of the speakers A and B of the ejection device according to the invention is under pressure during the off-ejection phase.
  • the venting of the first chamber A provided by the valve 12 makes it possible to avoid having a pressurized gas in the ejection device during the off-ejection phase, irrespective of the axial position. separation means 5. Any unnecessary mechanical stress that would weaken the ejection device is thus avoided.
  • the fact that the internal pressure of the fluid ejection device is always balanced with the outside makes it possible to install it as close as possible to the areas to be supplied. fluid 14, facilitating the response to the constraints imposed by the aviation regulations. This also makes it possible to reduce the length of the distribution pipe connecting the ejection device to the zones in question.
  • the linear pressure drop in the distribution pipe is reduced, which allows to obtain a larger fluid flow 14 for a given ejection pressure.
  • the ejection efficiency of the device is thus improved.
  • reducing the length of the distribution pipe and optimizing the thickness of the walls of the ejection device can meet the requirements of mass savings in aeronautics.
  • the valve 12 comprises a valve body 32 preferably fixed to the first end portion 3 of the tank 1.
  • the valve body 32 is hollow and preferably substantially tubular in shape. It allows the communication of gas between the first chamber A and the external environment of the tank 1.
  • a plug 35 sealingly closes the portion of the valve body 32 communicating with the external environment.
  • Said valve body 32 comprises at least one communication conduit 34 connecting the interior of the body of the valve 32 to the external environment of the tank 1.
  • the inner face 32I has a valve seat 32S located substantially near the end of the valve body 32 communicating with the first chamber A.
  • a movable piece 31 is able to move in the axial direction of the valve body 32 and has a head 31T adapted to come into contact with said valve seat 32S thereby defining said position closed of the valve.
  • the valve 12 further comprises a separating means 33 movable in the axial direction of the valve body 32 and located radially between the valve body 32 and the movable part 31, said separating means 33 being adapted to come opposite said conduit. communication 34 of the valve body, so as to block any flow of gas generated through the communication conduit 34, forming in this a second security of closure.
  • the movable separating means 33 bears against an abutment portion 32B of the valve body 32, under the action of, for example, a spring 36 compressed between the movable separating means 33 and the plug 35, in such a way that the separating means 33 is not opposite said communication duct 34.
  • the moving part 31 bears on the movable separating means 33 by means of a stop member 38 integral with the moving part 31, under the action of a spring 37 compressed between the abutment piece 38 and the cap 35. It defines a first valve chamber 30A communicating with the first chamber A of the tank 1 and a second valve chamber 30B communicating with the external environment.
  • the two enclosures 30A and 30B communicate with each other via communication conduits 39 located inside the moving part, comprising an inlet 39A situated substantially in the first chamber 30A of the valve and an outlet 39B located in the second enclosure 30B of valve.
  • the precise positioning (by construction or adjustment) of the abutment piece 38 on the movable part 31 determines a slight clearance 40 between the movable part 31 and the valve body 32 thus allowing communication between the first chamber A of the tank 1 and the external environment, through the conduits 34 of the body 32 and the ducts 39 of the movable part 31.
  • the clearance 40 and the communication conduits 34 and 39 have a size that does not allow inertial flow.
  • a characteristic size of the clearance 40 and conduits 34 and 39 may be of the order of one millimeter.
  • the movable separating means 33 in its movement closes the conduits 34 of the body 32, which ensures a double seal (contact between the head 31T of the movable part 31 with the seat 32S of the body 32 on the one hand and closure of the ducts 34 of the body 32 by the separating means 33 on the other hand).
  • the inlet 39A of the duct 39 of the movable part 31 is closed off by an integral peg 35E of the plug 35.
  • a spring means 13 may be disposed in said first chamber A of said tank 1 and placed between the first end portion 3 and the separating means 5 so as to exert a compressive force in the axial direction of said tank 1 on said separation means 5, always oriented in the direction of the second end portion 4. This compression force always oriented in the same direction minimizes the volume of the second chamber B and keeps in permanent contact the separation means 5 with the fluid 14 to eject. The surface 5B of the separation means 5 is thus entirely in contact with the fluid 14 to be ejected.
  • the Figure 6A shows a spring means 13 in the form of helical spring, however other types of spring can be used.
  • the fluid 14 has a volume expansion and then exerts pressure on the separating means 5 in the direction of the first end portion 3.
  • the separating means 5 then moves in the direction of the first end portion 3
  • the spring means 13 is deformed and exerts a compression force, always oriented in the direction of the second end portion 4, on the separating means 5.
  • the intensity of the force exerted by the means of spring 13 depends on the intensity of the deformation of this latest.
  • the surface 5B of the separating means is kept completely and permanently in contact with the fluid 14 to be ejected, and the second enclosure B has a minimum volume.
  • the fluid 14 decreases in volume. Due to the pressure exerted by the spring means 13 on the separating means 5, the separating means 5 moves in the direction of the second end portion 4 so as to maintain full and permanent contact between the surface 5B the central portion 5C of the separating means 5 with the fluid 14 to be ejected.
  • the second speaker B always has a minimum volume.
  • the minimization of second chamber B by the separating means 5 on which exerts the spring effect makes it possible to overcome any constraint orientation of the ejection device. It is no longer necessary to orient the ejection device in the direction of gravity with the ejection port 16A at the bottom.
  • the ejection efficiency of the fluid 14 is improved since the face 5A of the separating means 5 undergoes both the compressive force of the spring means 13 and the pressure of the gas generated, which increases the flow rate. ejection of the fluid 14 through the ejection port 16A.
  • a monitoring device In the context of aeronautical applications, it is advantageous for a monitoring device to continuously check the integrity of a fluid ejection device, in particular for an extinguishing application but also for an application as a backup hydraulic generator.
  • the monitoring device consists of an electrical circuit such that the latter changes state, between the open state and the closed state, when the separation means 5 is in an axial position. determined between the first end 3 and the second end 4.
  • said electrical circuit is open when the separation means is between said determined position and the second end 4 and closed when it is between the first end portion 3 and said determined position.
  • This electrical circuit consists of two electrical conductors, for example electrical wires or tracks, arranged on the inner face 2I of the cylindrical body 2 and extending in the axial direction of the tank 1. One end of the son is connected to an electrical circuit via a sealed connector 21 located in the first end portion 3.
  • the other end of at least one electrical conductor is positioned at a determined distance from the second end portion 4, thereby defining an open position of the electrical circuit.
  • the two conductors are electrically connected by the separating means 5, for example by the locking means 19 also made of conductive material.
  • the separation means 5 closes the electrical circuit when it is located between the first end portion 3 and said open position, the circuit being open when it is located between said open position and the second end portion 4.
  • the opening of the circuit will be recognized by a monitoring system as a lack of integrity of the fluid ejection device.
  • the monitoring device 20 consists of at least one conductive wire 20, preferably two, fixed on the one hand to the separation means 5 and connected for example to a ground circuit via a sealed connector 21 located on the first end part 3, as illustrated by FIGS. 6A, 6B and 6C .
  • the length of the wire is adapted to the different positions that can take the separation means 5 in the tank 1 as a function of the extreme operating temperatures of the ejection device, as shown by the Figures 6A and 6B .
  • the wire undergoes no excessive mechanical stress in the off-ejection phase.
  • the separation means 5 will continue its movement towards the second end portion 4 of the tank 1 under the pressure exerted by the spring means 13. The stress on the son will therefore increase continuously. As shown in Figure 6C where we see the ejection device discharged, beyond a predetermined position of the separation means 5, the stress will cause the breaking or disconnection of at least one son.
  • the breaking or disconnection of at least one conductive wire leads to the opening of a ground circuit, an opening constituting a signal which will be recognized by a monitoring system as a fault of integrity of the fluid ejection device. and will cause a maintenance operation during which the problem will be quickly identified.
  • the figure 3 illustrates an embodiment in which the separation means 5 may have at least one communication conduit 15, preferably four distributed at 90 ° opening laterally and perpendicular to the inner wall 2I of the cylindrical body 2.
  • the cylindrical body 2 comprises substantially near the second end portion 4 a shoulder 17. This shoulder 17 allows the depressurization of the first chamber A and the complete ejection of the fluid 14 and as a result of the gas generated in the distribution means.
  • the separating means 5 when the separating means 5 is substantially in abutment at the end of travel near the second end portion 4, there is communication of the first enclosure A with the distribution means so that the generated gas flows through the orifice 15 placed vis-à-vis the shoulder 17 and then flows in at less a recess 18 located in the inner face 4I of the second end portion 4, to the ejection port 16A.
  • the recess 18 can also be made on the face 5B of the separation means 5 so as to allow the flow of the generated gas to the ejection port 16A.
  • the fluid 14 is ejected and the generated gas is discharged into the distribution means. This allows complete emptying of the fluid ejection device, both in fluid 14 to be ejected and in generated gas.
  • This also makes it possible to put the tank 1 in the open air and thus to avoid any mechanical stress related to a possible residual overpressure. This in particular ensures the safety of an operator, for example during a maintenance operation, since any risk of intervention on the device still having an internal overpressure is discarded.
  • the separating means 5 is provided with a locking means 19, as illustrated in FIG. figure 3 .
  • This locking means 19, for example an elastic segment or a metal rod and spring assembly, is placed between the sealing elements 6 and above the orifices 15 whose function is to lock the separation means 5 at the end of the journey. this is to avoid any return back of said separation means 5 by reaction to a possible water hammer or back pressure in the distribution means which would affect the efficiency of the discharge.
  • the lateral portion 5L of the separation means 5 is opposite the shoulder 17.
  • the segment moves in the radial direction of the tank 1 in this shoulder 17 and therefore constitutes a mechanical stop preventing any return back of the separation means 5.
  • the figure 7 illustrates an alternative embodiment in which the separation means 5 comprises a rupture zone 5R extending at the circumference of the central portion 5C and located between the central portion 5C and the lateral portion 5L of the separation means 5.
  • the second end portion 4 comprises an abutment portion 4B so that, under the pressure of the generated gas, said central portion 5C comes into contact with the abutment portion 4B thereby causing rupture of the rupture zone 5R of the separation 5, so as to allow communication between the first chamber A and the ejection port 16A.
  • the generated gas can be evacuated and then flow through the dispensing means. This allows complete emptying of the fluid ejection device, both in fluid to be ejected and in generated gas. This also makes it possible to put the tank 1 in the open air and thus to avoid any mechanical stress related to a possible residual overpressure.
  • the figure 8A shows the idle ejection device according to the embodiment presented in the figure 7 .
  • the spring means 13 is not shown for the sake of clarity of the figure.
  • the separating means 5 is positioned near the first end portion 3.
  • Figure 8B shows the initial phase of the ejection in which the gas generated is introduced into the first chamber A and exerts a pressure on the surface 5A of the separating means 5.
  • the separation means 5 then exerts a force on the fluid to be ejected 14 in the direction of the second end portion 4. Accordingly, the dispensing cap 16 opens and the fluid 14 is discharged through the ejection port 16A.
  • the separating means 5 has moved towards the second end portion 4 under the combined effect of the pressure exerted by the generated gas and the compressive force exerted by the spring means 13.
  • the part 5C central of the separation means has come into contact with the abutment portion 4B of the second end portion 4, while the side portion 5L of the separating means 5 is not in contact with any abutment portion.
  • the central portion 5C can not continue the movement in the direction of the second end portion 4 due to contact with the abutment portion 4B, while the side portion 5L can continue the displacement.
  • the lateral portion 5L disengages from the central portion 5C by breaking the rupture zone 5R.
  • the figure 8D shows the ejection device at the end of the ejection phase.
  • the lateral part 5L of the separating means 5 has become detached from the central part 5C and has abutted against the second end portion 4, thus creating a circumferentially extending opening situated between the lateral part 5L and the central part 5C of the means of 5.
  • ejection ducts 4E are provided in the second end portion 4 so as to allow the evacuation of the fluid 14 and the generated gas to the ejection port 16A.
  • the generated gas can be evacuated and then flow through the dispensing means.
  • This allows complete emptying of the fluid ejection device, both in fluid to be ejected and in generated gas. This also makes it possible to put the tank 1 in the open air and thus to avoid any mechanical stress related to a possible residual overpressure.
  • the device can advantageously be used as a hydraulic generation system called "last aid" for aircraft.
  • a hydraulic generation system called "last aid" for aircraft.
  • the expelled fluid is a hydraulic oil of suitable characteristics for the application in question.
  • the figure 9 represents the device for ejecting a fluid according to one embodiment of the invention.
  • This comprises a reservoir 1 whose body 2 is substantially cylindrical in shape, separated into two chambers A and B by a separator element 5 of the piston type, able to slide longitudinally in the reservoir.
  • One of the chambers B contains the fluid to be ejected and is closed by an end portion 4, or flange, comprising a cap 16, separating the chamber B containing the fluid distribution circuit.
  • the piston 5 comprises sealing means with the inner side wall of the reservoir, in the form of an elastic segment 19 and / or a lip seal 6, or sealing segment.
  • the pressurizing chamber A is also closed by another end portion 3, or flange, and contains a pyrotechnic gas generator 7.
  • the flange 3 closing the pressurization chamber is provided with valve means (not shown) and allowing it to communicate with the outside air vis-à-vis slow variations in pressure.
  • the piston is held in contact with the fluid to be ejected by spring means acting on the piston along the longitudinal axis of the cylinder.
  • spring means may consist of a helical spring of longitudinal axis (not shown) disposed between the upper flange 3 and the piston 5, or, if the device does not have means for venting the chamber pressurization, they can be formed by the gas initially contained therein.
  • the pressurizing chamber A is leakproof vis-à-vis the outside.
  • Said gas preferably an inert gas, is introduced therein when the device is mounted under a pressure slightly greater than atmospheric pressure by means of a valve (This is not shown) located, for example, on the upper flange 3.
  • This initial gas pressure in the pressurizing chamber is chosen so that the piston presses on the fluid to be ejected even when said fluid occupies a minimum volume under the effect of the thermal expansion and that the maximum pressure in the fluid, when it occupies a maximum volume under the effect of the thermal expansion is sufficiently far from the pressure causing the rupture of the lid, so that it can not there is no risk of rupture of the lid outside the case of tripping of the device.
  • the seal between the two chambers is improved by the presence of a sock 50 between the piston 5 and the upper flange 3 in the pressurizing chamber A.
  • this sock is made of a material diametrically expandable, so that it can perform its sealing role during the rise in pressure in the pressurizing chamber. So that the sock 50 does not prevent the piston from constantly pressing the fluid to be ejected, it is made of a longitudinally expandable material between the two extreme positions that can occupy the piston in contact with the fluid to be ejected under the effect of the thermal expansion of this fluid.
  • the sock 50 comprises at least one fold 51 which facilitates its extension.
  • the discharge of the tank is triggered by triggering the pyrotechnic gas generator 7.
  • the generation of a volume of gas in the pressurization chamber leads to the increase of the pressure in this chamber, which pressure is transmitted to the fluid at eject into the other chamber B via the piston.
  • the seal 16 breaks, causing the flow of fluid in the dispensing circuit and the translation of the piston, plated on the fluid by the pressure generated in the pressurizing chamber.
  • the pressure in the pressurizing chamber also causes the diametral expansion of the sock 50.
  • the expansion of the segment blocks any possibility of raising the piston and, consequently, any possibility of rising fluid in the reservoir.
  • the piston comprises a valve 60 capable of passing the gases of the pyrotechnic reaction to the distribution circuit, in order to purge it.
  • the Figures 11 to 19 represent a fluid ejection device.
  • the figure 11A represents a first embodiment of a fluid ejection device using a reservoir 1 of substantially spherical shape comprising an inner membrane 105 separating the reservoir into two chambers A, B.
  • the first chamber A can be placed in communication with a gas compressed by valve 700.
  • the second chamber B containing the fluid to be ejected, such as an extinguishing agent for fire fighting.
  • the membrane 105 deforms towards the chamber B containing the fluid, the increase in the pressure which results in said fluid causes the rupture of the tear-off lid 16 releasing the connection orifice of the reservoir with the fluid distribution circuit 25.
  • the reservoir is put in communication with the distribution circuit 25 and the fluid flows into it in the direction of the point of delivery. use.
  • the figure 11A represents such a device at the end of emptying.
  • Chamber B contains no more or very little fluid.
  • the membrane 105 is then press-fitted against the communication orifice between the reservoir and the distribution circuit and obstructs this orifice so that any reintroduction of fluid into the reservoir is impossible, and that several reservoirs of this type can be mounted. in parallel on the same distribution circuit and sequentially triggered without the fluid ejected from a tank comes to fill one of the tanks already emptied.
  • this embodiment makes it possible to eliminate the check valves on the circuit and thus to eliminate the losses of charges noted in their presence.
  • the membrane 105 must be sufficiently flexible to ensure complete emptying of the tank and effective sealing of the connection orifice, also called ejection orifice, and sufficiently resistant to not be pierced under the effect of pressure or the encounter with the orifice at the end of emptying.
  • the membrane 105 may consist of an unreinforced elastomer.
  • an embodiment of the device comprises ( Figure 2B ) a tank 1 whose body 2 is cylindrical inside which there is a piston 5 comprising sealing means 6 between said piston and the inner wall of the tank.
  • the piston is able to move axially in the reservoir so as to cause the ejection of the fluid out of the reservoir in the manner of a syringe.
  • the displacement of the piston is obtained by any means known to those skilled in the art, in particular by means of a jack or by the introduction into the tank of gas under pressure on the side of the face opposite to the face of the piston in contact. with the fluid.
  • the piston 5 By causing the piston 5 to move axially (the Figure 11B shows two stages of displacement of said piston 5), the pressure in the fluid increases to cause rupture of the tear-off lid 16 closing the orifice of the connection 16A of the tank with the distribution circuit 25.
  • the fluid is ejected from the reservoir by the movement of the piston 5 in the direction of the arrow and then flows into the distribution circuit 25 towards the point of use.
  • the piston 5 closes the connection orifice with the circuit, either by direct contact or by means of sealing means 6 which can be placed on the piston (case of the Figure 2B ) or alternatively connected to the reservoir near the connection 16A with the distribution circuit.
  • an advantageous embodiment ( figure 12 ) comprises locking means of the piston 5 at the end of the race.
  • These locking means can be obtained by the cooperation of an elastic ring 19, or elastic segment, installed in a groove of the piston 5 and a shoulder 17 formed in the tank body at the end comprising the connection with the circuit distribution 25.
  • the segment or elastic ring 19 placed in the groove of the piston tends to expand, that is to say to increase in diameter.
  • the elastic ring 19 deviates until it reaches the diameter of the shoulder 17. the piston can not go back even in the absence of the application of a mechanical action on it.
  • the pressurized gas necessary for the ejection of the fluid can be generated by the triggering of a pyrotechnic cartridge 70 placed directly in the tank or in the vicinity.
  • the piston then defines two chambers A, B separated in a sealed manner, the first A being intended to receive the gas under pressure necessary to cause axial displacement of the piston.
  • the second chamber B contains the fluid.
  • the ignition of the pyrotechnic cartridge 70 causes the generation of gas under pressure which has the effect of propelling the piston towards the other end, thus compressing the fluid in the chamber B.
  • the fluid reaches a given pressure, it tears operculum and flows into the distribution circuit.
  • the piston is locked by the combined action of the elastic ring 19 and the shoulder 17, thus forming a non-return in the tank.
  • the tank may be equipped with a pressure equalizing valve 12, for example as described above.
  • This particular valve balances the pressure between the inside of the chamber A and the outside of the tank in the event of a slow variation of said pressure and closes in the event of a peak pressure.
  • the resulting sudden change in pressure in the chamber A closes the valve 12, and propels the piston 5 towards the other end of the reservoir, ejecting the fluid after rupture of the seal 16.
  • the elastic ring 19 deviates in the shoulder 17 preventing any return of the piston and thus forming a non-return system vis-à-vis -vis fluid in the distribution circuit.
  • the pressure then stabilizes in the chamber A to a value greater than the pressure outside the body.
  • the balancing valve 12 then allows the leakage of the gas out of chamber A and the pressure drop in it.
  • the balancing valve 12 can be normally closed and controlled at the opening by a system connecting it to the position of the piston 5 locked at the end of stroke, allowing the depressurization of the chamber A.
  • the figure 14 shows a partial sectional view of the piston 5 incorporating valve means adapted to put in communication the chamber A containing the gas under pressure and the chamber B containing the fluid.
  • valve means comprise a bore 110 in the piston 5. Said bore is closed by a valve 111 carrying two seats 212, 213, the seat 213 located on the side of the chamber A receiving the pressurized gas being produced directly by the boring, the seat 212 located on the fluid side being constituted in an insert ring 214.
  • the valve 111 is ideally pressed against each of the seats 212, 213 by spring means 112.
  • the axial position of the ring 214 is adjustable in order to ensure a perfect range of the two ends of the valve 111 on the two seats 212, 213.
  • the spring means 112 and the outer diameters of the two ends of the valve 111 are chosen so that during the emptying the axial force applied to the valve resulting from the pressure of the gas and which tends to open said valve, equilibrates with the sum of the force applied on the other end of the valve by the fluid and the force of the spring 112, the last two forces tending to close the valve.
  • the valve is closed and sealed.
  • the pressure applied by the gas on the valve 111 is no longer balanced by the pressure of the fluid and the valve opens, allowing the pressurized gas which enters the distribution circuit 25 to pass through and promotes ejection of the fluid.
  • valve means 140 can be arranged radially.
  • the piston 5 comprises a skirt 113 extending axially, said skirt having an annular groove comprised in sealing means 121, 122 arranged axially on either side of the groove.
  • the sealing means 121, 122 and the groove form a sealed annular chamber 80.
  • Valve means 140 are mounted radially and are capable of communicating the annular chamber 80 with the chamber A containing the gas under pressure.
  • the two sealing means 121, 122 disposed on either side of the annular groove of the piston are in contact with the inner wall of the cylinder.
  • the pressurized gas tends to open the valve 140, and enters the sealed annular chamber until the pressures are balanced and the valve closes under the action of the valve spring.
  • the elastic ring 19 expands in the shoulder 17 preventing the return of the piston 5. Due to the presence of the shoulder 17, the sealing means 122 located near the face before the piston 5 is no longer in contact with the tank wall and no longer fulfills its sealing function. Under the effect of the pressure of the gas, the valve 140 opens and communicates the gas under pressure with the distribution circuit 25.
  • valve means in the skirt 113 of the piston are replaced by simple slots 115 formed in said skirt and opening into the sealed annular chamber 80. Said openings are closed by a circular elastic ring 116 placed in the groove of the piston and tending , by elasticity, to be pressed into the bottom of this groove, so that the lights of the skirt 115 are closed by the ring 116.
  • the pressure causes the expansion of the ring 116 which is no longer plated at the bottom of the groove communicates the chamber A containing the gas under pressure with the sealed annular chamber 80.
  • the bottom of the tank comprises stops 101 able to receive the piston 5 at the end of the stroke.
  • the piston comes into contact with said stops 101 at the same time that the elastic ring 19 blocks the return of the piston by engaging in the shoulder 17.
  • the chamber 80 is no longer tight end of stroke.
  • the gas pressure continues to expand the ring 116, the gas can flow through the lumens 115 to the distribution circuit.
  • the ring 116 shrinks on the lights ensuring the sealing of the piston and its role as a non-return system vis-à-vis the fluid contained in the distribution circuit.
  • the elastic ring 116 capable of sealing the lights 115 is advantageously a split ring ( Figures 18 and 19 ).
  • this slot can advantageously be used to angularly orient the ring 116 and ensure that said slot is not positioned facing a light 115.
  • the groove of the piston receiving the ring 116 is advantageously provided with a protuberance 215 at the bottom of the groove.

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  • Health & Medical Sciences (AREA)
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  • Business, Economics & Management (AREA)
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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
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  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Actuator (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Nozzles (AREA)
  • Catching Or Destruction (AREA)

Claims (9)

  1. Fluidausstoßvorrichtung, umfassend einen Behälter (1) von im Wesentlichen zylindrischer Form, ein ihn in zwei Kammern (A, B) aufteilendes Trennelement (5), Dichtungseinrichtungen (6, 19) zwischen dem Trennelement und den Seitenwänden des Behälters, wobei, um das relative Volumen der Kammern zu verändern, das genannte Trennelement (5) in dem Behälter gemäß dessen Längsachse verschiebbar ist, eine erste Kammer (B) mit einem Fluid gefüllt ist und eine durch eine Verschlusseinrichtung verschlossene Öffnung aufweist, sodass durch die Wirkung der Verschiebung des Trennelements und das Öffnen der Verschlusseinrichtung das genannte Fluid durch die genannte Öffnung aus dem Behälter ausgestoßen werden kann, ein mit der genannten Öffnung verbundener Fluid-Verteilungskreis, Einrichtungen (7) fähig den Druck in der anderen, Druckbeaufschlagungskammer genannten Kammer so zu verändern, dass das Trennelement verschoben wird, wobei die genannte Druckbeaufschlagungskammer (A) einen Balg (50) umfasst, fähig das Innere der Druckbeaufschlagungskammer von den Seitenwänden des Behälters dichtungsweise zu trennen,
    dadurch gekennzeichnet, dass die Einrichtungen (7) einen pyrotechnischen Gas-Erzeuger umfassen, verbunden mit der Druckbeaufschlagungskammer (A), dass die Dichtheit des Balgs unterbrochen ist jenseits einer bestimmten Längsposition des Trennelement, und dass die Ausstoßvorrichtung Einrichtungen (60) umfasst, fähig Kommunikation zwischen den Gasen herzustellen, erzeugt durch die pyrotechnische Reaktion mit dem Fluidversorgungskreis am Ende des Fluidausstoßes.
  2. Fluidausstoßvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Balg (50) fähig ist, die Dichtheit zwischen der Druckbeaufschlagungskammer (A) und den Wänden des Zylinders zwischen zwei Längspositionen des Trennelements (5) auf konstante Weise gewährleisten kann.
  3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass der Balg (50) aus einem nachgiebigen diametral dehnbaren Material besteht.
  4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Balg wenigstens eine Falte (51) umfasst, fähig sich unter der Wirkung der Verschiebung des Trennelements (5) aufzufalten.
  5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass sie eine bei der Druckbeaufschlagungskammer (A) angeordnete Druckkontrollvorrichtung (12) umfasst, fähig bei Fehlen des genannten unter Druck in dem Behälter (1) erzeugten Gases eine offene Konfiguration einzunehmen, um die genannte Druckbeaufschlagungskammer (A) mit der Außenumgebung bzw. Umgebungsluft zu verbinden, unabhängig von der axialen Position des Trennelements (5), und eine geschlossene Konfiguration bei Vorhandensein des genannten unter Druck in dem Behälter (1) erzeugten Gases, um die Dichtheit der genannten Druckbeaufschlagungskammer (A) zu gewährleisten,
    wobei die genannte Druckkontrollvorrichtung (12) eine eine Wand des genannten Behälters (1) durchquerende, mit der Umgebungsluft verbindende Leitung (32) und ein bewegliches Teil (31) zum Schließen der genannten Leitung (32) umfasst und dieses genannte bewegliche Schließteil (31) gesteuert werden kann :
    - von einer Öffnungsstellung der genannten Leitung (32) entsprechend der genannten offenen Konfiguration der Druckkontrollvorrichtung (12),
    - nach einer Verschlussstellung der genannten Leitung (32) entsprechend der genannten geschlossenen Konfiguration der Druckkontrollvorrichtung (12).
  6. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass sie Einrichtungen (6, 19, 17) umfasst, fähig jeden Gas- oder Fluid-Rückfluss der Verteilungskreis in den Behälter nach seiner vollständigen Druckentlastung zu verhindern.
  7. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das auszustoßende Fluid ein Löschmittel vom Typ Fluorketon ist.
  8. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das auszustoßende Fluid ein hydraulisches Öl ist.
  9. Flugzeug mit einer Vorrichtung nach einem der Ansprüche 6 oder 7.
EP20080845284 2007-10-30 2008-10-29 Fluidausstossvorrichtung mit verbesserter dichtheit Active EP2205325B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR0758697A FR2922972B1 (fr) 2007-10-30 2007-10-30 Dispositif d'ejection de fluide et utilisation d'un tel dispositif.
FR0801687A FR2929126B1 (fr) 2008-03-28 2008-03-28 Dispositif d'ejection d'un fluide muni d'un dispositif anti-retour
FR0805467A FR2936715B1 (fr) 2008-10-03 2008-10-03 Dispositif d'ejection d'un fluide a etancheite renforcee
PCT/EP2008/064689 WO2009056574A1 (fr) 2007-10-30 2008-10-29 Dispositif d'ejection d'un fluide a etancheite renforcee

Publications (2)

Publication Number Publication Date
EP2205325A1 EP2205325A1 (de) 2010-07-14
EP2205325B1 true EP2205325B1 (de) 2012-02-22

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US (1) US8783372B2 (de)
EP (1) EP2205325B1 (de)
JP (1) JP2011500242A (de)
CN (1) CN101909699B (de)
AT (1) ATE546199T1 (de)
BR (1) BRPI0818830B1 (de)
CA (1) CA2703853C (de)
RU (1) RU2493892C2 (de)
WO (1) WO2009056574A1 (de)

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CN110270038A (zh) * 2019-07-18 2019-09-24 安徽安瑞德自动化科技有限公司 一种非储压式灭火装置及其控制系统
CN110478836A (zh) * 2019-09-11 2019-11-22 安徽天辰云泽安全科技有限公司 一种小空间非贮压式灭火装置
CN111692141B (zh) * 2020-04-30 2022-08-23 武汉船用机械有限责任公司 用于油缸控制的液压系统
KR102243460B1 (ko) * 2020-06-03 2021-04-21 이영숙 화재 진압 시스템
CN114432627B (zh) * 2020-10-30 2022-11-29 安徽工业大学 一种增压灭火装置
CN112587843A (zh) * 2020-12-16 2021-04-02 安徽中科中涣防务装备技术有限公司 一种可实现二次灭火的外置式灭火装置
FR3143375A1 (fr) * 2022-12-19 2024-06-21 ARIANEGROUP SAS / InstSp Extincteur d’incendie courbé pour moteur

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CN101909699B (zh) 2012-12-26
EP2205325A1 (de) 2010-07-14
US8783372B2 (en) 2014-07-22
BRPI0818830A2 (pt) 2015-04-22
RU2010121896A (ru) 2011-12-10
CA2703853C (fr) 2015-11-24
CN101909699A (zh) 2010-12-08
BRPI0818830B1 (pt) 2018-08-07
CA2703853A1 (fr) 2009-05-07
ATE546199T1 (de) 2012-03-15
WO2009056574A1 (fr) 2009-05-07
RU2493892C2 (ru) 2013-09-27
US20100230118A1 (en) 2010-09-16
JP2011500242A (ja) 2011-01-06

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