EP3378801B1 - Air gun system - Google Patents

Air gun system Download PDF

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Publication number
EP3378801B1
EP3378801B1 EP17305328.1A EP17305328A EP3378801B1 EP 3378801 B1 EP3378801 B1 EP 3378801B1 EP 17305328 A EP17305328 A EP 17305328A EP 3378801 B1 EP3378801 B1 EP 3378801B1
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Prior art keywords
piston
air
volume
main
compressed
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EP17305328.1A
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German (de)
French (fr)
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EP3378801A1 (en
Inventor
Christian Dalmasso
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ValID
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ValID
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Priority to ES17305328T priority Critical patent/ES2779769T3/en
Priority to EP17305328.1A priority patent/EP3378801B1/en
Publication of EP3378801A1 publication Critical patent/EP3378801A1/en
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    • 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
    • B65D88/00—Large containers
    • B65D88/54—Large containers characterised by means facilitating filling or emptying
    • B65D88/64—Large containers characterised by means facilitating filling or emptying preventing bridge formation
    • B65D88/70—Large containers characterised by means facilitating filling or emptying preventing bridge formation using fluid jets
    • B65D88/703—Air blowing devices, i.e. devices for the sudden introduction of compressed air into the container

Definitions

  • the present invention relates to an air gun system.
  • silo For a silo, they are for example installed on the wall of the silo and have an outlet which opens inside the silo to act on the materials stored in the silo.
  • the tank To make a new shot, the tank must be refilled, which can be particularly long and costly. However, in some applications, we have noticed the advantage of making several successive shots, in a reduced period of time.
  • said control member comprises a secondary piston movable between two positions, called first position and second position.
  • the pneumatic device comprises a pressure chamber in which move said main piston and said secondary piston and comprising said volume, said volume being adjustable between said main piston and said secondary piston and intended to be supplied by said source d secondary compressed air.
  • the pneumatic device comprises a reserve chamber and at least one opening connecting said reserve chamber to the pressure chamber, said at least one opening being arranged relative to the secondary piston to be opened or closed according to the position of said piston secondary.
  • the system comprises a point of injection of compressed air opening into the reserve chamber.
  • the system comprises a spring arranged between said body and said secondary piston to urge said secondary piston towards its first position.
  • control means comprise pneumatic triggering means.
  • control means comprise a valve cooperating with said pneumatic triggering means.
  • said pneumatic triggering means comprise an exhaust valve.
  • the system includes a compressed air tank connected to said main inlet.
  • the system comprises a spring arranged between said main piston and the body of the system.
  • the invention relates to a cannon system for expelling a volume of gas at very high speed, shown in the figure 1 .
  • This type of system is used in particular to act on loose materials, in order to facilitate their flow or to avoid crust formation on the walls of the containers.
  • the gas expelled is advantageously air.
  • the air gun system of the invention is shown in the figure 1 .
  • the air cannon system of the invention comprises a body 1 delimiting an internal volume V intended to receive a volume of air under pressure.
  • the system has a main input IN intended to be connected to a source of compressed air.
  • This main input IN comprises for example a conduit having a first end intended to be connected to said source and a second end opening out inside said internal volume V.
  • the source of compressed air is advantageously formed by a reservoir 15 which is fixed on said main input IN of the system to supply the system with compressed air during a shot.
  • the volume of the reservoir 15 may vary depending on the applications.
  • the filling of the reservoir 15 will advantageously be carried out via an injection point I3 connected to an air compressor.
  • the reservoir 15 will be part of the system of the invention.
  • the system has a main output OUT through which compressed air is expelled to the outside of the barrel.
  • This main output OUT comprises for example a conduit having a first end opening into said internal volume V of the body 1 of the system and a second end opening to the outside of the system.
  • the control means advantageously include pneumatic triggering means.
  • These pneumatic release means include an exhaust valve 11 defining an upstream volume V1 intended to receive pressurized air and a downstream volume V2.
  • the exhaust valve 11 is arranged to control an exhaust of air from the system causing it to be triggered. Its control is ensured indirectly by the switching of the solenoid valve 10. It can take two distinct extreme positions to control an air passage 110, a first position in which it is maintained by the pressure of the air contained in its upstream volume for blocking an air exhaust from the system, via the passage 110, and a second position in which it allows an air exhaust from the system via said passage 110. Conventionally, it is mounted on a return spring the returning to its closed position.
  • the system comprises a main piston 12 movable in sliding relative to the body 1 between two positions, a first position closing said main output OUT and a second position opening said main output OUT.
  • the system advantageously comprises a seat 14 produced on the first end of the conduit of the main output OUT and against which the main piston 12 is intended to come to bear when it is in its first position to close the main output OUT.
  • the system advantageously comprises a spring R1 arranged between said body 1 and the main piston 12 and intended to urge the main piston 12 against its seat 14. It will also make it possible to assist in rapid closure of the main piston 12 after each shot.
  • the system comprises a specific pneumatic device having in particular the function of controlling the return of the main piston 12 towards its first position, that is to say towards the position in which it closes the main output OUT, thus allowing , either to return the piston 12 to its first position by interrupting the evacuation of the air from the reservoir 15, or else to carry out several successive shots.
  • this pneumatic device is arranged to create a pressure differential sufficient to bring the main piston 12 to its first position.
  • This pneumatic device notably comprises a control member for generating a pneumatic force allowing the main piston 12 to return to its initial position and means for generating said pneumatic force.
  • This control member is automatically controlled by the movement of the main piston 12 from its first position to its second position.
  • the control member is formed by a secondary piston 13 able to move between at least two extreme stop positions, called first position and second position.
  • the pneumatic device further comprises a secondary compressed air source and a volume into which said secondary compressed air source opens. The displacement of the secondary piston 13 between its two positions makes it possible to control the supply of said volume by the secondary compressed air source.
  • This volume is arranged to be in contact at least in part with an actuating surface of the main piston to cause its displacement. The precise operation will be described below in conjunction with the Figures 2A to 2H .
  • the pneumatic device comprises a pressure chamber arranged in said internal volume V and in which the main piston 12 and the secondary piston 13 move.
  • the pressure chamber is delimited by a first jacket in which the main piston slides 12 and the secondary piston 13.
  • This pressure chamber has several volumes V3, V4 (see below) which can be adjusted according to the position taken both by the main piston 12 and by the secondary piston 13.
  • a first volume V3 is arranged for be in communication with said downstream volume V2, through said passage 130, and a second volume V4 is generated between the two pistons 12, 13 and is made to vary according to the position taken by the main piston 12 and the secondary piston 13.
  • This second volume V4 is notably delimited by two surfaces of the main piston 12 and of the secondary piston facing each other screws and separable from each other by the compressed air located in this second volume V4, and say upper surface for the main piston 12 and lower surface for the secondary piston 13.
  • This second volume V4 will thus be maximum when the main piston 12 is in its first position and the secondary piston 13 in its second and minimum position when said two surfaces of the pistons are in abutment against one another, the volume V4 then being formed of a residual gap 161 formed between the two pistons.
  • the system comprises channels formed in the main piston and the secondary piston. As shown in the appended figures, it will in particular be an axial bore produced in each piston and radial orifices.
  • the pneumatic device has one or more openings 160 arranged to supply the second volume V4 of the pressure chamber with compressed air.
  • the injection of compressed air into the second volume V4 of the pressure chamber through said passage is advantageously controlled by the position taken by the secondary piston 13.
  • the supply of compressed air to the second volume V4 of the pressure chamber is thus blocked when the secondary piston 13 is in its first position and authorized when the secondary piston 13 is in its second position.
  • At least one gap 161 is advantageously provided between the main piston 12 and the secondary piston 13 when they are both pressing against each other.
  • the secondary compressed air source is arranged to open at said interstice to supply it.
  • This gap 161 corresponds to the volume V4 when the latter is minimal and has the function of making it possible to initiate the growth of the second volume V4 of the pressure chamber when the secondary piston 13 is in its second position. It is for example produced on the lower surface of the secondary piston 13.
  • the pneumatic device advantageously comprises a passage 130 arranged between the first volume V3 of the pressure chamber and the downstream volume V2 controlled by the exhaust valve 11.
  • the secondary piston 13 is arranged to control the circulation of air through this passage 130. In its first position, the secondary piston 13 allows the circulation of air through this passage. In its second position, the secondary piston 13 blocks said passage 130 and thus isolates the pressure chamber.
  • the secondary compressed air source of the pneumatic device is produced from a reserve chamber 16 intended to store compressed air and arranged to communicate with said pressure chamber through each opening 160.
  • Said chamber reserve 16 is advantageously delimited by a second jacket produced on the periphery of the first jacket delimiting said pressure chamber.
  • the two shirts may be produced in the form of a single piece of material, for example of metallic material.
  • this reserve chamber 16 may be replaced by a direct supply of compressed air, then forming the source of secondary compressed air.
  • the system comprises means for resetting the pneumatic device.
  • These resetting means are thus arranged to ensure a return of the secondary piston 13 from its second position to its first position in order to return the system to its initial state and to allow a new shot to be made.
  • These reset means advantageously comprise at least one spring R2 bearing against the body 1 and arranged to urge the secondary piston 13 towards its first position. The primary function of this R2 spring is to keep the secondary piston 13 in its seat, ensuring the tightness of the system and also helping the piston return to its first position during resetting.
  • the seat 14 of the main piston 12 can be attached to the second jacket forming the reserve chamber, so as to create a structure in one piece, easily replaceable.
  • the main piston 12 may also have a gap formed when it is in its seat 14 and intended to be able to initiate its movement from its first position to its second position.
  • these different injection points can be grouped into two injection points, or even into a single injection point.
  • the internal volume V of the system is filled with compressed air.
  • the filling is for example carried out by the first injection point I1.
  • the reserve chamber 16 is filled with compressed air via the second injection point I2.
  • the reservoir is also filled with compressed air via the third injection point I3.
  • the system is thus generally under pressure (P1).
  • the main piston 12 is in its first position.
  • the secondary piston 13 is in its first position.
  • the reserve chamber will always have a pressure higher than that of the reservoir until the moment after a few shots (and this as a function of the volume of reservoir chosen) the residual pressures will balance.
  • this works because, due to the size of the orifice of its main outlet OUT, the reservoir 15 will always lose a little more pressure than the reserve chamber 16.
  • the system of the invention thus has the main advantage of interrupting the evacuation of the volume of non-useful air and allowing faster filling and saving energy.
  • the system allows for several successive shots, saving time and money.
  • the realization of several successive shots in a reduced period of time proves to be particularly effective.
  • the system of the invention is more particularly simple in its design and in its operation.
  • the system of the invention can be associated with any control solution, in particular computer, making it possible to carry out a sequence of several successive shots by controlling the solenoid valve, according to the intended application.
  • the solenoid valve will advantageously be connected to an output of a programmable automaton executing said command sequence or any other equipment making it possible to implement the command sequence.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Multiple-Way Valves (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Jet Pumps And Other Pumps (AREA)

Description

Domaine technique de l'inventionTechnical field of the invention

La présente invention se rapporte à un système de canon à air.The present invention relates to an air gun system.

Etat de la techniqueState of the art

Les systèmes de canon à air, appelés également décolmateurs pneumatiques, sont des appareils destinés notamment :

  • A faciliter ou rétablir l'écoulement des matériaux en vrac stockés dans des silos ou à l'air libre sous forme de tas ;
  • Eviter les formations de croutage sur les parois d'échangeur de température, par exemple dans les cimenteries ou les fours à chaux ;
Air gun systems, also called pneumatic decongulators, are devices intended in particular:
  • To facilitate or restore the flow of bulk materials stored in silos or in the open air in the form of a heap;
  • Avoid crust formation on the heat exchanger walls, for example in cement factories or lime kilns;

Pour un silo, ils sont par exemple installés sur la paroi du silo et présentent une sortie qui débouche à l'intérieur du silo pour venir agir sur les matériaux stockés dans le silo.For a silo, they are for example installed on the wall of the silo and have an outlet which opens inside the silo to act on the materials stored in the silo.

Leur principe de fonctionnement consiste à libérer un volume d'air stocké dans un réservoir le plus rapidement possible. La quantité d'air ainsi libérée atteint des vitesses très élevées ce qui a pour conséquence la génération d'une onde de choc ainsi qu'un effet dynamique agissant sur les matériaux en vrac. Ces phénomènes permettent ainsi de venir déséquilibrer et de détruire les voutes ou croutages créées par les matériaux et empêchant le bon écoulement.Their operating principle consists in releasing a volume of air stored in a tank as quickly as possible. The quantity of air thus released reaches very high speeds which results in the generation of a shock wave as well as a dynamic effect acting on bulk materials. These phenomena thus make it possible to unbalance and destroy the vaults or crusts created by the materials and preventing proper flow.

En référence à la figure 1, de manière connue, un système de canon à air connu comporte classiquement :

  • Un corps relié à un réservoir, l'ensemble définissant un volume interne,
  • Un conduit d'entrée d'air de remplissage commandé par une électrovanne et débouchant dans ledit volume interne pour assurer le remplissage du système en air comprimé, ledit conduit d'entrée d'air étant relié à un compresseur,
  • Un clapet d'échappement rapide positionné entre l'entrée d'air et le volume interne du réservoir,
  • Un conduit de sortie d'air par lequel l'air est expulsé,
  • Un piston mobile dans ledit corps entre une première position dans laquelle il obture la sortie d'air et une deuxième position dans laquelle le réservoir est mis en communication avec la sortie d'air.
With reference to the figure 1 , in a known manner, a known air gun system conventionally comprises:
  • A body connected to a reservoir, the assembly defining an internal volume,
  • A filling air inlet duct controlled by a solenoid valve and opening into said internal volume to fill the system with compressed air, said air inlet duct being connected to a compressor,
  • A quick exhaust valve positioned between the air inlet and the internal volume of the tank,
  • An air outlet duct through which the air is expelled,
  • A piston movable in said body between a first position in which it closes the air outlet and a second position in which the reservoir is placed in communication with the air outlet.

De manière générale, les différentes étapes de son fonctionnement sont les suivantes :

  • Remplissage en air comprimé du volume interne et du réservoir en déplaçant le clapet d'échappement rapide, maintenant le piston principal dans sa première position,
  • Commutation de l'électrovanne et mise à l'air libre, en amont du clapet d'échappement, provoquant le déplacement du clapet vers sa position d'ouverture,
  • Sous l'effet de l'air comprimé présent dans le volume interne, le piston se déplace vers sa deuxième position autorisant une libération de l'air comprimé présent dans le réservoir par le conduit de sortie d'air.
In general, the different stages of its operation are as follows:
  • Filling with compressed air of the internal volume and the tank by moving the rapid exhaust valve, keeping the main piston in its first position,
  • Switching of the solenoid valve and venting, upstream of the exhaust valve, causing the valve to move to its open position,
  • Under the effect of the compressed air present in the internal volume, the piston moves towards its second position authorizing a release of the compressed air present in the tank by the air outlet duct.

Cette solution de l'état de la technique présente un inconvénient important lié au fait qu'après déclenchement, le réservoir se vide en totalité. L'air comprimé dans le réservoir n'est donc utilisé que pour un seul tir. Un tel système de canon à air est aussi connu du document CN 201411181 .This prior art solution has a significant drawback linked to the fact that after triggering, the tank is emptied entirely. The compressed air in the tank is therefore only used for one shot. Such an air gun system is also known from the document CN 201411181 .

Pour réaliser un nouveau tir, le réservoir doit être rempli à nouveau, ce qui peut s'avérer particulièrement long et coûteux. Or dans certaines applications, on s'est aperçu de l'intérêt de réaliser plusieurs tirs successifs, dans un laps de temps réduit.To make a new shot, the tank must be refilled, which can be particularly long and costly. However, in some applications, we have noticed the advantage of making several successive shots, in a reduced period of time.

De plus, on s'est aperçu que lors de l'expulsion de l'air générée par le tir, seules certaines phases, où les vitesses sont supersoniques et l'éjection d'air directionnelle, sont pertinentes pour la majorité des applications, la masse d'air évacuée en totalité ne contribuant plus à l'efficacité du système.In addition, we have noticed that during the expulsion of the air generated by the shot, only certain phases, where the speeds are supersonic and the directional air ejection, are relevant for the majority of applications, the mass of exhaust air no longer contributing to the efficiency of the system.

Il existe donc un besoin de proposer un système de canon à air qui permette de pallier certains inconvénients de l'état de la technique, en proposant une solution qui :

  • Permette d'assurer plusieurs tirs successifs ;
  • Optimise la quantité d'air comprimé consommé lors de chaque tir, tout en conservant une grande efficacité ;
  • Permette d'augmenter le rendement en fonctionnement d'une telle installation ;
  • Permette un gain en temps et en coût ;
There is therefore a need to propose an air cannon system which makes it possible to overcome certain drawbacks of the state of the art, by proposing a solution which:
  • Allows to ensure several successive shots;
  • Optimizes the amount of compressed air consumed during each shot, while maintaining high efficiency;
  • Allows to increase the operating efficiency of such an installation;
  • Save time and cost;

Exposé de l'inventionStatement of the invention

Ce but est atteint par un système de canon à air selon les caractéristiques de la revendication 1. Il comprend:

  • Un corps formant un volume interne,
  • Des moyens de contrôle agencés pour déclencher un tir,
  • Une entrée principale destinée à être reliée à une source d'air comprimé et débouchant dans ledit volume interne du corps,
  • Une sortie principale reliée au volume interne du corps et destinée à expulser de l'air comprimé vers l'extérieur,
  • Un piston principal mobile entre deux positions, une première position obturant ladite sortie principale et une deuxième position ouvrant ladite sortie principale,
  • Un dispositif pneumatique qui comporte un organe de commande commandé par un déplacement du piston principal de sa première position vers sa deuxième position, une source d'air comprimé secondaire et au moins un volume en contact avec ledit piston principal et dans lequel débouche ladite source d'air comprimé secondaire, l'organe de commande étant agencé pour contrôler l'alimentation dudit volume par la source d'alimentation secondaire,
  • Des moyens de réarmement dudit dispositif pneumatique.
This object is achieved by an air cannon system according to the features of claim 1. It comprises:
  • A body forming an internal volume,
  • Control means arranged to trigger a shot,
  • A main entrance intended to be connected to a source of compressed air and opening into said internal volume of the body,
  • A main outlet connected to the internal volume of the body and intended to expel compressed air to the outside,
  • A main piston movable between two positions, a first position closing said main outlet and a second position opening said main outlet,
  • A pneumatic device which comprises a control member controlled by a displacement of the main piston from its first position to its second position, a source of secondary compressed air and at least one volume in contact with said main piston and into which opens said source of secondary compressed air, the control member being arranged to control the supply of said volume by the secondary supply source,
  • Resetting means for said pneumatic device.

Selon l'invention, ledit organe de commande comporte un piston secondaire mobile entre deux positions, dites première position et deuxième position.According to the invention, said control member comprises a secondary piston movable between two positions, called first position and second position.

Selon l'invention, le dispositif pneumatique comporte une chambre de pression dans laquelle se déplacent ledit piston principal et ledit piston secondaire et comprenant ledit volume, ledit volume étant modulable entre ledit piston principal et ledit piston secondaire et destiné à être alimenté par ladite source d'air comprimé secondaire.According to the invention, the pneumatic device comprises a pressure chamber in which move said main piston and said secondary piston and comprising said volume, said volume being adjustable between said main piston and said secondary piston and intended to be supplied by said source d secondary compressed air.

Selon une particularité, le dispositif pneumatique comporte une chambre de réserve et au moins une ouverture reliant ladite chambre de réserve à la chambre de pression, ladite au moins une ouverture étant agencée par rapport au piston secondaire pour être ouverte ou fermée selon la position dudit piston secondaire.According to one feature, the pneumatic device comprises a reserve chamber and at least one opening connecting said reserve chamber to the pressure chamber, said at least one opening being arranged relative to the secondary piston to be opened or closed according to the position of said piston secondary.

Selon une autre particularité, le système comporte un point d'injection d'air comprimé débouchant dans la chambre de réserve.According to another particular feature, the system comprises a point of injection of compressed air opening into the reserve chamber.

Selon une autre particularité, le système comporte un ressort agencé entre ledit corps et ledit piston secondaire pour solliciter ledit piston secondaire vers sa première position.According to another particular feature, the system comprises a spring arranged between said body and said secondary piston to urge said secondary piston towards its first position.

Selon une autre particularité, les moyens de contrôle comportent des moyens pneumatiques de déclenchement.According to another particular feature, the control means comprise pneumatic triggering means.

Selon un mode de réalisation particulier, les moyens de contrôle comportent une vanne coopérant avec lesdits moyens pneumatiques de déclenchement.According to a particular embodiment, the control means comprise a valve cooperating with said pneumatic triggering means.

Selon une autre particularité, lesdits moyens pneumatiques de déclenchement comportent un clapet d'échappement.According to another particular feature, said pneumatic triggering means comprise an exhaust valve.

Selon une autre particularité, le système comporte un réservoir d'air comprimé connecté sur ladite entrée principale.In another feature, the system includes a compressed air tank connected to said main inlet.

Selon une autre particularité, le système comporte un ressort agencé entre ledit piston principal et le corps du système.According to another particular feature, the system comprises a spring arranged between said main piston and the body of the system.

Brève description des figuresBrief description of the figures

D'autres caractéristiques et avantages vont apparaître dans la description détaillée qui suit faite en regard des dessins annexés dans lesquels :

  • La figure 1 représente, vu en coupe, le système de canon à air de l'invention.
  • Les figures 2A à 2H illustrent les différentes étapes de fonctionnement du système de canon à air de l'invention.
Other characteristics and advantages will appear in the detailed description which follows made with reference to the appended drawings in which:
  • The figure 1 represents, seen in section, the air cannon system of the invention.
  • The Figures 2A to 2H illustrate the different stages of operation of the air cannon system of the invention.

Description détaillée d'au moins un mode de réalisationDetailed description of at least one embodiment

L'invention concerne un système de canon permettant d'expulser un volume de gaz à très haute vitesse, représenté sur la figure 1. Ce type de système est notamment employé pour agir sur des matériaux en vrac, afin de faciliter leur écoulement ou d'éviter la formation de croutage sur les parois des conteneurs.The invention relates to a cannon system for expelling a volume of gas at very high speed, shown in the figure 1 . This type of system is used in particular to act on loose materials, in order to facilitate their flow or to avoid crust formation on the walls of the containers.

De manière non limitative, le gaz expulsé est avantageusement de l'air.Without limitation, the gas expelled is advantageously air.

Le système de canon à air de l'invention est représenté sur la figure 1.The air gun system of the invention is shown in the figure 1 .

Le système de canon à air de l'invention comporte un corps 1 délimitant un volume interne V destiné à recevoir un volume d'air sous pression.The air cannon system of the invention comprises a body 1 delimiting an internal volume V intended to receive a volume of air under pressure.

Le système comporte une entrée principale IN destinée à être reliée à une source d'air comprimé. Cette entrée principale IN comporte par exemple un conduit présentant une première extrémité destinée à être raccordée à ladite source et une deuxième extrémité débouchant à l'intérieur dudit volume interne V.The system has a main input IN intended to be connected to a source of compressed air. This main input IN comprises for example a conduit having a first end intended to be connected to said source and a second end opening out inside said internal volume V.

La source d'air comprimé est avantageusement formée d'un réservoir 15 venant se fixer sur ladite entrée principale IN du système pour alimenter le système en air comprimé lors d'un tir. Le volume du réservoir 15 pourra varier selon les applications. Le remplissage du réservoir 15 sera avantageusement réalisé via un point d'injection I3 relié à un compresseur d'air. De manière avantageuse, le réservoir 15 fera partie du système de l'invention.The source of compressed air is advantageously formed by a reservoir 15 which is fixed on said main input IN of the system to supply the system with compressed air during a shot. The volume of the reservoir 15 may vary depending on the applications. The filling of the reservoir 15 will advantageously be carried out via an injection point I3 connected to an air compressor. Advantageously, the reservoir 15 will be part of the system of the invention.

Le système comporte une sortie principale OUT par laquelle l'air comprimé est expulsé vers l'extérieur du canon. Cette sortie principale OUT comporte par exemple un conduit présentant une première extrémité débouchant dans ledit volume interne V du corps 1 du système et une deuxième extrémité débouchant à l'extérieur du système.The system has a main output OUT through which compressed air is expelled to the outside of the barrel. This main output OUT comprises for example a conduit having a first end opening into said internal volume V of the body 1 of the system and a second end opening to the outside of the system.

Le système comporte des moyens de contrôle, employés pour assurer notamment le déclenchement du système. Ces moyens de contrôle comportent une vanne, telle que par exemple une électrovanne 10 à plusieurs états :

  • Un premier état dans lequel elle autorise une injection d'air comprimé dans le système ;
  • Un deuxième état dans lequel elle coupe l'alimentation en air comprimé du système et met à l'air libre le volume amont du clapet.
The system includes control means, used to ensure in particular the triggering of the system. These control means include a valve, such as for example a solenoid valve 10 with several states:
  • A first state in which it authorizes an injection of compressed air into the system;
  • A second state in which it cuts the supply of compressed air to the system and releases the upstream volume of the valve.

Les moyens de contrôle comportent avantageusement des moyens pneumatiques de déclenchement. Ces moyens pneumatiques de déclenchement comportent un clapet d'échappement 11 délimitant un volume amont V1 destiné à recevoir de l'air sous pression et un volume aval V2. Le clapet d'échappement 11 est agencé pour contrôler un échappement d'air du système entraînant son déclenchement. Son contrôle est assuré de manière indirecte par la commutation de l'électrovanne 10. Il peut prendre deux positions extrêmes distinctes pour contrôler un passage d'air 110, une première position dans laquelle il est maintenu par la pression de l'air contenu dans son volume amont pour bloquer un échappement d'air du système, via le passage 110, et une deuxième position dans laquelle il autorise un échappement d'air du système via ledit passage 110. De manière classique, il est monté sur un ressort de rappel le ramenant vers sa position de fermeture.The control means advantageously include pneumatic triggering means. These pneumatic release means include an exhaust valve 11 defining an upstream volume V1 intended to receive pressurized air and a downstream volume V2. The exhaust valve 11 is arranged to control an exhaust of air from the system causing it to be triggered. Its control is ensured indirectly by the switching of the solenoid valve 10. It can take two distinct extreme positions to control an air passage 110, a first position in which it is maintained by the pressure of the air contained in its upstream volume for blocking an air exhaust from the system, via the passage 110, and a second position in which it allows an air exhaust from the system via said passage 110. Conventionally, it is mounted on a return spring the returning to its closed position.

Le système comporte un piston principal 12 mobile en coulissement par rapport au corps 1 entre deux positions, une première position obturant ladite sortie principale OUT et une deuxième position ouvrant ladite sortie principale OUT. Le système comporte avantageusement un siège 14 réalisé sur la première extrémité du conduit de la sortie principale OUT et contre lequel le piston principal 12 est destiné à venir en appui lorsqu'il est dans sa première position pour obturer la sortie principale OUT.The system comprises a main piston 12 movable in sliding relative to the body 1 between two positions, a first position closing said main output OUT and a second position opening said main output OUT. The system advantageously comprises a seat 14 produced on the first end of the conduit of the main output OUT and against which the main piston 12 is intended to come to bear when it is in its first position to close the main output OUT.

Le système comporte avantageusement un ressort R1 agencé entre ledit corps 1 et le piston principal 12 et destiné à solliciter le piston principal 12 contre son siège 14. II permettra en outre d'aider à une fermeture rapide du piston principal 12 après chaque tir.The system advantageously comprises a spring R1 arranged between said body 1 and the main piston 12 and intended to urge the main piston 12 against its seat 14. It will also make it possible to assist in rapid closure of the main piston 12 after each shot.

Selon l'invention, le système comporte un dispositif pneumatique spécifique ayant notamment pour fonction de contrôler le retour du piston principal 12 vers sa première position, c'est-à-dire vers la position dans laquelle il obture la sortie principale OUT, permettant ainsi, soit de ramener le piston 12 à sa première position en interrompant l'évacuation de l'air du réservoir 15, ou encore de réaliser plusieurs tirs successifs. Pour cela, ce dispositif pneumatique est agencé pour créer un différentiel de pression suffisant pour ramener le piston principal 12 vers sa première position.According to the invention, the system comprises a specific pneumatic device having in particular the function of controlling the return of the main piston 12 towards its first position, that is to say towards the position in which it closes the main output OUT, thus allowing , either to return the piston 12 to its first position by interrupting the evacuation of the air from the reservoir 15, or else to carry out several successive shots. For this, this pneumatic device is arranged to create a pressure differential sufficient to bring the main piston 12 to its first position.

Ce dispositif pneumatique comporte notamment un organe de commande de génération d'une force pneumatique permettant un retour du piston principal 12 vers sa position initiale et des moyens de génération de ladite force pneumatique. Cet organe de commande est commandé automatiquement par le déplacement du piston principal 12 de sa première position vers sa deuxième position. L'organe de commande est formé d'un piston secondaire 13 apte à se déplacer entre au moins deux positions extrêmes de butée, dites première position et deuxième position. Pour générer ladite force pneumatique, le dispositif pneumatique comporte en outre une source d'air comprimé secondaire et un volume dans lequel débouche ladite source d'air comprimé secondaire. Le déplacement du piston secondaire 13 entre ses deux positions permet de contrôler l'alimentation dudit volume par la source d'air comprimé secondaire. Ce volume est agencé pour être en contact au moins en partie avec une surface d'actionnement du piston principal pour entraîner son déplacement. Le fonctionnement précis sera décrit ci-après en liaison avec les figures 2A à 2H.This pneumatic device notably comprises a control member for generating a pneumatic force allowing the main piston 12 to return to its initial position and means for generating said pneumatic force. This control member is automatically controlled by the movement of the main piston 12 from its first position to its second position. The control member is formed by a secondary piston 13 able to move between at least two extreme stop positions, called first position and second position. To generate said pneumatic force, the pneumatic device further comprises a secondary compressed air source and a volume into which said secondary compressed air source opens. The displacement of the secondary piston 13 between its two positions makes it possible to control the supply of said volume by the secondary compressed air source. This volume is arranged to be in contact at least in part with an actuating surface of the main piston to cause its displacement. The precise operation will be described below in conjunction with the Figures 2A to 2H .

De manière plus précise, le dispositif pneumatique comporte une chambre de pression agencée dans ledit volume interne V et dans laquelle se déplacent le piston principal 12 et le piston secondaire 13. La chambre de pression est délimitée par une première chemise dans laquelle coulissent le piston principal 12 et le piston secondaire 13. Cette chambre de pression présente plusieurs volumes V3, V4 (voir ci-après) modulables selon la position prise à la fois par le piston principal 12 et par le piston secondaire 13. Un premier volume V3 est agencé pour être en communication avec ledit volume aval V2, par ledit passage 130, et un deuxième volume V4 est généré entre les deux pistons 12, 13 et est amené à varier selon la position prise par le piston principal 12 et le piston secondaire 13. Ce deuxième volume V4 est notamment délimité par deux surfaces du piston principal 12 et du piston secondaire en vis-à-vis et séparables entre elles par l'air comprimé situé dans ce deuxième volume V4, et dites surface supérieure pour le piston principal 12 et surface inférieure pour le piston secondaire 13. Ce deuxième volume V4 sera ainsi maximal lorsque le piston principal 12 est dans sa première position et le piston secondaire 13 dans sa seconde position et minimal lorsque lesdites deux surfaces des pistons sont en appui l'une contre l'autre, le volume V4 étant alors formé d'un interstice 161 résiduel ménagé entre les deux pistons.More specifically, the pneumatic device comprises a pressure chamber arranged in said internal volume V and in which the main piston 12 and the secondary piston 13 move. The pressure chamber is delimited by a first jacket in which the main piston slides 12 and the secondary piston 13. This pressure chamber has several volumes V3, V4 (see below) which can be adjusted according to the position taken both by the main piston 12 and by the secondary piston 13. A first volume V3 is arranged for be in communication with said downstream volume V2, through said passage 130, and a second volume V4 is generated between the two pistons 12, 13 and is made to vary according to the position taken by the main piston 12 and the secondary piston 13. This second volume V4 is notably delimited by two surfaces of the main piston 12 and of the secondary piston facing each other screws and separable from each other by the compressed air located in this second volume V4, and say upper surface for the main piston 12 and lower surface for the secondary piston 13. This second volume V4 will thus be maximum when the main piston 12 is in its first position and the secondary piston 13 in its second and minimum position when said two surfaces of the pistons are in abutment against one another, the volume V4 then being formed of a residual gap 161 formed between the two pistons.

Selon un aspect de l'invention, le système comporte des canaux ménagés dans le piston principal et le piston secondaire. Comme représenté sur les figures annexées, il s'agira notamment d'un alésage axial réalisé dans chaque piston et des orifices radiaux.According to one aspect of the invention, the system comprises channels formed in the main piston and the secondary piston. As shown in the appended figures, it will in particular be an axial bore produced in each piston and radial orifices.

Le dispositif pneumatique comporte une ou plusieurs ouvertures 160 agencées pour alimenter le deuxième volume V4 de la chambre de pression en air comprimé. L'injection d'air comprimé dans le deuxième volume V4 de la chambre de pression à travers ledit passage est avantageusement commandée par la position prise par le piston secondaire 13. L'alimentation du deuxième volume V4 de la chambre de pression en air comprimé est ainsi bloquée lorsque le piston secondaire 13 est dans sa première position et autorisée lorsque le piston secondaire 13 est dans sa deuxième position.The pneumatic device has one or more openings 160 arranged to supply the second volume V4 of the pressure chamber with compressed air. The injection of compressed air into the second volume V4 of the pressure chamber through said passage is advantageously controlled by the position taken by the secondary piston 13. The supply of compressed air to the second volume V4 of the pressure chamber is thus blocked when the secondary piston 13 is in its first position and authorized when the secondary piston 13 is in its second position.

Comme décrit ci-dessus au moins un interstice 161 est avantageusement ménagé entre le piston principal 12 et le piston secondaire 13 lorsqu'ils sont tous deux en appui l'un contre l'autre. La source d'air comprimé secondaire est agencée pour déboucher au niveau dudit interstice pour l'alimenter. Cet interstice 161 correspond au volume V4 lorsque celui-ci est minimal et a pour fonction de permettre d'initier la croissance du deuxième volume V4 de la chambre de pression lorsque le piston secondaire 13 est dans sa deuxième position. Il est par exemple réalisé sur la surface inférieure du piston secondaire 13.As described above, at least one gap 161 is advantageously provided between the main piston 12 and the secondary piston 13 when they are both pressing against each other. The secondary compressed air source is arranged to open at said interstice to supply it. This gap 161 corresponds to the volume V4 when the latter is minimal and has the function of making it possible to initiate the growth of the second volume V4 of the pressure chamber when the secondary piston 13 is in its second position. It is for example produced on the lower surface of the secondary piston 13.

Le dispositif pneumatique comporte avantageusement un passage 130 agencé entre le premier volume V3 de la chambre de pression et le volume aval V2 contrôlé par le clapet d'échappement 11. Selon sa position, le piston secondaire 13 est agencé pour contrôler la circulation d'air à travers ce passage 130. Dans sa première position, le piston secondaire 13 autorise la circulation d'air à travers ce passage. Dans sa deuxième position, le piston secondaire 13 bloque ledit passage 130 et isole ainsi la chambre de pression.The pneumatic device advantageously comprises a passage 130 arranged between the first volume V3 of the pressure chamber and the downstream volume V2 controlled by the exhaust valve 11. Depending on its position, the secondary piston 13 is arranged to control the circulation of air through this passage 130. In its first position, the secondary piston 13 allows the circulation of air through this passage. In its second position, the secondary piston 13 blocks said passage 130 and thus isolates the pressure chamber.

De manière avantageuse, la source d'air comprimé secondaire du dispositif pneumatique est réalisée à partir d'une chambre de réserve 16 destinée à stocker de l'air comprimé et agencée pour communiquer avec ladite chambre de pression à travers chaque ouverture 160. Ladite chambre de réserve 16 est avantageusement délimitée par une deuxième chemise réalisée en périphérie de la première chemise délimitant ladite chambre de pression. Les deux chemises pourront être réalisées sous la forme d'une même pièce en matériau, par exemple en matériau métallique.Advantageously, the secondary compressed air source of the pneumatic device is produced from a reserve chamber 16 intended to store compressed air and arranged to communicate with said pressure chamber through each opening 160. Said chamber reserve 16 is advantageously delimited by a second jacket produced on the periphery of the first jacket delimiting said pressure chamber. The two shirts may be produced in the form of a single piece of material, for example of metallic material.

En variante de réalisation, cette chambre de réserve 16 pourra être remplacée par une alimentation directe en air comprimé, formant alors la source d'air comprimé secondaire.In an alternative embodiment, this reserve chamber 16 may be replaced by a direct supply of compressed air, then forming the source of secondary compressed air.

Selon un aspect particulier de l'invention, le système comporte des moyens de réarmement du dispositif pneumatique. Ces moyens de réarmement sont ainsi agencés pour assurer un retour du piston secondaire 13 de sa deuxième position vers sa première position afin de remettre le système dans son état initial et de permettre de réaliser un nouveau tir. Ces moyens de réarmement comportent avantageusement au moins un ressort R2 en appui contre le corps 1 et agencé pour solliciter le piston secondaire 13 vers sa première position. Ce ressort R2 a pour fonction première de maintenir le piston secondaire 13 sur son siège, assurant l'étanchéité du système et aide également au retour du piston vers sa première position lors d'un réarmement.According to a particular aspect of the invention, the system comprises means for resetting the pneumatic device. These resetting means are thus arranged to ensure a return of the secondary piston 13 from its second position to its first position in order to return the system to its initial state and to allow a new shot to be made. These reset means advantageously comprise at least one spring R2 bearing against the body 1 and arranged to urge the secondary piston 13 towards its first position. The primary function of this R2 spring is to keep the secondary piston 13 in its seat, ensuring the tightness of the system and also helping the piston return to its first position during resetting.

De manière avantageuse, le siège 14 du piston principal 12 peut être rattaché à la deuxième chemise formant la chambre de réserve, de manière à créer une structure en une seule pièce, facilement remplaçable.Advantageously, the seat 14 of the main piston 12 can be attached to the second jacket forming the reserve chamber, so as to create a structure in one piece, easily replaceable.

Le piston principal 12 pourra également comporter un interstice formé lorsqu'il est sur son siège 14 et destiné à pouvoir initier son déplacement de sa première position vers sa deuxième position.The main piston 12 may also have a gap formed when it is in its seat 14 and intended to be able to initiate its movement from its first position to its second position.

Selon un aspect de l'invention, le système comporte avantageusement plusieurs points d'injection d'air comprimé, notamment :

  • Un premier point d'injection I1 pour le remplissage du système et le maintien de son volume interne sous pression ;
  • Un deuxième point d'injection I2 pour le remplissage de la chambre de réserve et le maintien de la chambre de réserve sous pression ;
  • Un troisième point d'injection I3 pour le remplissage du réservoir ;
According to one aspect of the invention, the system advantageously comprises several injection points for compressed air, in particular:
  • A first injection point I1 for filling the system and maintaining its internal volume under pressure;
  • A second injection point I2 for filling the reserve chamber and keeping the reserve chamber under pressure;
  • A third injection point I3 for filling the reservoir;

Selon un aspect de l'invention, ces différents points d'injection peuvent être regroupés en deux points d'injection, ou même en un seul point d'injection.According to one aspect of the invention, these different injection points can be grouped into two injection points, or even into a single injection point.

En référence aux figures 2A à 2H, le système de l'invention fonctionne de manière générale tel que décrit ci-dessous. Dans cette description, il faut comprendre que les différentes indications de pression (P0, P1, P2) sont données à titre d'indication et sont là pour mieux comprendre le principe de l'invention. De même, le fonctionnement est décrit en partant d'une architecture dotée d'un réservoir d'air comprimé 15 et de trois points d'injection I1, I2, I3 en air comprimé, tels que décrit ci-dessus. Dans la description ci-dessous, il faut aussi comprendre que certaines étapes peuvent être réalisées de manière simultanée.With reference to Figures 2A to 2H , the system of the invention generally works as described below. In this description, it should be understood that the various pressure indications (P0, P1, P2) are given by way of indication and are there to better understand the principle of the invention. Likewise, the operation is described on the basis of an architecture provided with a compressed air tank 15 and three injection points I1, I2, I3 in compressed air, as described above. In the description below, it should also be understood that certain steps can be carried out simultaneously.

Etape E0 - figure 2A Step E0 - Figure 2A

Avant un tir, pour être prêt à fonctionner, le volume interne V du système est rempli d'air comprimé. Le remplissage est par exemple réalisé par le premier point d'injection I1.Before a shot, to be ready to operate, the internal volume V of the system is filled with compressed air. The filling is for example carried out by the first injection point I1.

La chambre de réserve 16 est remplie d'air comprimé via le deuxième point d'injection I2.The reserve chamber 16 is filled with compressed air via the second injection point I2.

Le réservoir est également rempli d'air comprimé via le troisième point d'injection I3.The reservoir is also filled with compressed air via the third injection point I3.

Le système est ainsi globalement sous pression (P1).The system is thus generally under pressure (P1).

Le piston principal 12 est dans sa première position.The main piston 12 is in its first position.

Le piston secondaire 13 est dans sa première position.The secondary piston 13 is in its first position.

Etape E1 - figure 2B Step E1 - Figure 2B

  • Commutation de l'électrovanne 10 dans son deuxième état de manière à interrompre l'alimentation du système en air comprimé et à mettre le système à l'air libre.Switching of the solenoid valve 10 in its second state so as to interrupt the supply of compressed air to the system and to put the system in the open air.
  • L'air sous pression présent dans le volume amont V1 du clapet d'échappement s'échappe ainsi vers l'extérieur (à la pression P0) via un canal adapté.The pressurized air present in the upstream volume V1 of the exhaust valve thus escapes to the outside (at pressure P0) via a suitable channel.
  • Le clapet d'échappement 11 obture toujours le passage 110.The exhaust valve 11 always closes the passage 110.
  • La pression présente dans le volume amont V1 du clapet d'échappement ayant chuté (P0), la pression (P1) présente dans les volumes V2 et V3 va repousser le clapet d'échappement 11.The pressure present in the upstream volume V1 of the exhaust valve having dropped (P0), the pressure (P1) present in the volumes V2 and V3 will push back the exhaust valve 11.
Etape E2 - figure 2C Step E2 - Figure 2C

  • Sous l'effet de la pression, le clapet d'échappement 11 libère le passage 110.
    • L'air comprimé présent dans les volumes V2 et V3 s'échappe vers l'extérieur en passant par les canaux internes présents dans le piston principal 12 et le piston secondaire 13, puis par le passage 130 ouvert contrôlé par le piston secondaire 13 et par le passage 110 ouvert contrôlé par le clapet d'échappement 11.
    Under the effect of the pressure, the exhaust valve 11 releases the passage 110.
    • The compressed air present in volumes V2 and V3 escapes to the outside via the internal channels present in the main piston 12 and the secondary piston 13, then through the open passage 130 controlled by the secondary piston 13 and by the open passage 110 controlled by the exhaust valve 11.
Etape E3 - figures 2D et 2E Step E3 - Figures 2D and 2E

  • Le clapet d'échappement 11 étant ouvert, l'air comprimé présent dans le volume interne V entraîne un déplacement du piston principal 12 de sa première position vers sa deuxième position.The exhaust valve 11 being open, the compressed air present in the internal volume V causes the main piston 12 to move from its first position to its second position.
  • Le déplacement du piston principal 12 ouvre la sortie principale OUT. L'air comprimé contenu dans le réservoir peut alors s'échapper en partie par la sortie principale OUT.The displacement of the main piston 12 opens the main output OUT. The compressed air contained in the tank can then partly escape through the main outlet OUT.
  • Un premier tir est ainsi en cours.A first shot is thus in progress.
  • En se déplaçant, le piston principal 12 entraîne également le piston secondaire 13 qui se déplace de sa première position vers sa deuxième position, jusqu'à une position de libération des ouvertures 160 dans laquelle l'air de la chambre de réserve s'introduit dans l'interstice 161 ménagé entre le piston principal et le piston secondaire.By moving, the main piston 12 also drives the secondary piston 13 which moves from its first position to its second position, to a position for releasing the openings 160 in which the air from the reserve chamber is introduced into the gap 161 formed between the main piston and the secondary piston.
  • La pression (P2) de l'air comprimé venant de la chambre de réserve 16 étant plus forte que celle présente à la fois dans le volume interne et à l'extérieur, un différentiel de pression est généré entre la pression (P2) de l'air qui s'introduit dans le deuxième volume V4 de la chambre de pression et la pression (P1) de l'air présent dans le volume interne V et la pression (P0) de l'extérieur, entraînant la croissance du deuxième volume V4 de la chambre de pression.The pressure (P2) of the compressed air coming from the reserve chamber 16 being higher than that present both in the internal volume and outside, a pressure differential is generated between the pressure (P2) of the air which enters the second volume V4 of the pressure chamber and the pressure (P1) of the air present in the internal volume V and the pressure (P0) from the outside, causing the growth of the second volume V4 of the pressure chamber.
Etape E4 - figure 2F Step E4 - figure 2F

  • Le piston secondaire 13 atteint sa deuxième position.The secondary piston 13 reaches its second position.
  • Dans sa deuxième position, le piston secondaire 13 isole le volume V3 de l'extérieur en obturant le passage 130.In its second position, the secondary piston 13 isolates the volume V3 from the outside by closing the passage 130.
  • Dans sa deuxième position, le piston secondaire 13 libère complètement les ouvertures 160, permettant l'alimentation du deuxième volume V4 de la chambre de pression en air comprimé présent dans la chambre de réserve 16. L'air comprimé libéré vient s'immiscer entre le piston principal 12 et le piston secondaire 13, de manière à assurer la croissance du deuxième volume V4 de la chambre de pression et donc le maintien du piston secondaire 13 dans sa deuxième position et le retour du piston principal 12 vers sa première position.In its second position, the secondary piston 13 completely releases the openings 160, allowing the supply of the second volume V4 of the pressure chamber with compressed air present in the reserve chamber 16. The released compressed air is interfered between the main piston 12 and the secondary piston 13, so as to ensure the growth of the second volume V4 of the pressure chamber and therefore the maintenance of the secondary piston 13 in its second position and the return of the main piston 12 to its first position.
Etape E6 - figure 2G Step E6 - Figure 2G

  • Le piston principal 12 est maintenu dans sa première position par la pression présente dans le volume V4 relié à la chambre de réserve 16.The main piston 12 is held in its first position by the pressure present in the volume V4 connected to the reserve chamber 16.
  • Le piston secondaire 13 est maintenu dans sa deuxième position par la pression présente dans le volume V4.The secondary piston 13 is held in its second position by the pressure present in the volume V4.
  • Le deuxième volume V4 de la chambre de pression est maximal.The second volume V4 of the pressure chamber is maximum.
  • Dans cette étape, la chambre de réserve peut rester alimentée via le point I2, permettant de maintenir une surpression (P2) dans le deuxième volume V4 et donc de maintenir le piston secondaire 13 dans sa deuxième position et de maintenir le piston principal 12 dans sa première position.In this step, the reserve chamber can remain supplied via point I2, making it possible to maintain an overpressure (P2) in the second volume V4 and therefore to maintain the secondary piston 13 in its second position and to maintain the main piston 12 in its first position.
Etape E7 - figure 2H Step E7 - figure 2H

  • L'électrovanne 10 est commutée dans son premier état de manière à autoriser une injection d'air comprimé dans le volume amont V1 du clapet d'échappement 11 via le premier point d'injection I1.The solenoid valve 10 is switched to its first state so as to allow injection of compressed air into the upstream volume V1 of the exhaust valve 11 via the first injection point I1.
  • Sous l'effet de la pression (P1), le clapet d'échappement 11 est sollicité entraînant la fermeture du passage 110 d'air contrôlé par le clapet d'échappement 11.Under the effect of the pressure (P1), the exhaust valve 11 is biased causing the closure of the air passage 110 controlled by the exhaust valve 11.
  • La pression (P1) s'équilibre de part et d'autre du passage 130 d'air contrôlé par le piston secondaire 13.The pressure (P1) is balanced on either side of the air passage 130 controlled by the secondary piston 13.
  • Cet équilibre de pression ne permet plus au piston secondaire 13 de rester dans sa deuxième position.This pressure balance no longer allows the secondary piston 13 to remain in its second position.
  • Le piston secondaire 13 est sollicité vers sa première position par son ressort R2 et ramené vers sa première position sous l'effet de la remise en pression du système.The secondary piston 13 is biased towards its first position by its spring R2 and brought back to its first position under the effect of the re-pressure of the system.

Il faut comprendre que la chambre de réserve aura toujours une pression supérieure à celle du réservoir jusqu'au moment où à l'issue de quelques tirs (et ce en fonction du volume de réservoir choisi) les pressions résiduelles vont s'équilibrer. Bien entendu, il faut comprendre que cela fonctionne parce qu'en raison de la taille de l'orifice de sa sortie principale OUT, le réservoir 15 perdra toujours un peu plus de pression que la chambre de réserve 16.It should be understood that the reserve chamber will always have a pressure higher than that of the reservoir until the moment after a few shots (and this as a function of the volume of reservoir chosen) the residual pressures will balance. Of course, it should be understood that this works because, due to the size of the orifice of its main outlet OUT, the reservoir 15 will always lose a little more pressure than the reserve chamber 16.

Le système de l'invention présente ainsi l'avantage principal d'interrompre l'évacuation du volume d'air non utile et de permettre un remplissage plus rapide ainsi qu'une économie d'énergie. Suivant le volume du réservoir utilisé, le système permet de réaliser plusieurs tirs successifs, permettant un gain en temps et en argent. De plus, dans certaines applications, la réalisation de plusieurs tirs successifs dans un laps de temps réduit s'avère particulièrement efficace.The system of the invention thus has the main advantage of interrupting the evacuation of the volume of non-useful air and allowing faster filling and saving energy. Depending on the volume of the tank used, the system allows for several successive shots, saving time and money. In addition, in certain applications, the realization of several successive shots in a reduced period of time proves to be particularly effective.

Le système de l'invention s'avère de plus particulièrement simple dans sa conception et dans son fonctionnement.The system of the invention is more particularly simple in its design and in its operation.

Le système de l'invention pourra être associé à toute solution de commande, notamment informatique, permettant de réaliser une séquence de plusieurs tirs successifs par commande de l'électrovanne, selon l'application visée. L'électrovanne sera avantageusement connectée sur une sortie d'un automate programmable exécutant ladite séquence de commande ou tout autre équipement permettant de mettre en œuvre la séquence de commande.The system of the invention can be associated with any control solution, in particular computer, making it possible to carry out a sequence of several successive shots by controlling the solenoid valve, according to the intended application. The solenoid valve will advantageously be connected to an output of a programmable automaton executing said command sequence or any other equipment making it possible to implement the command sequence.

Claims (9)

  1. Air gun system including:
    - a body (1) forming an internal volume (V),
    - control means designed to trigger firing,
    - a main inlet (IN) that is intended to be connected to a compressed-air source and leads into said internal volume (V) of the body,
    - a main outlet (OUT) that is connected to the internal volume (V) of the body and is intended to expel compressed air to the outside,
    - a main piston (12) that is movable between two positions, a first position closing off said main outlet (OUT) and a second position opening said main outlet (OUT),
    - characterized in that it includes:
    - a pneumatic device designed to create a sufficient pressure difference to return the main piston (12) to its first position and which has a control member controlled by a movement of the main piston (12) from its first position to its second position, a secondary compressed-air source and at least one volume (V4) in contact with said main piston (12) and into which said secondary compressed-air source opens, and in that the control member is designed to control the feed of said volume (V4) by the secondary feed source,
    - said control member having a secondary piston that is movable between two positions, referred to as first position and second position,
    - the pneumatic device having a pressure chamber in which said main piston (12) and said secondary piston (13) move and comprising said volume (V4), said volume being adjustable between said main piston (12) and said secondary piston (13) and being intended to be fed by said secondary compressed-air source,
    - means for rearming said pneumatic device.
  2. System according to Claim 1, characterized in that the pneumatic device includes a reserve chamber (16) and at least one opening (160) connecting said reserve chamber (16) to the pressure chamber, said at least one opening (160) being arranged with respect to the secondary piston (13) so as to be open or closed depending on the position of said secondary piston (13).
  3. System according to Claim 2, characterized in that it includes a compressed-air injection point (12) that opens into the reserve chamber (16).
  4. System according to one of Claims 1 to 3, characterized in that it includes a spring (R2), referred to as second spring, arranged between said body (1) and said secondary piston (13) in order to urge said secondary piston (13) into its first position.
  5. System according to one of Claims 1 to 4, characterized in that the control means include pneumatic triggering means.
  6. System according to Claim 5, characterized in that the control means include a valve (10) cooperating with said pneumatic triggering means.
  7. System according to Claim 5 or 6, characterized in that said pneumatic triggering means include an exhaust valve (11).
  8. System according to one of Claims 1 to 7, characterized in that it includes a compressed-air reservoir connected to said main inlet.
  9. System according to one of Claims 1 to 8, characterized in that it includes a spring (R1), referred to as first spring, arranged between said main piston (12) and the body.
EP17305328.1A 2017-03-23 2017-03-23 Air gun system Active EP3378801B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES17305328T ES2779769T3 (en) 2017-03-23 2017-03-23 Air cannon system
EP17305328.1A EP3378801B1 (en) 2017-03-23 2017-03-23 Air gun system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17305328.1A EP3378801B1 (en) 2017-03-23 2017-03-23 Air gun system

Publications (2)

Publication Number Publication Date
EP3378801A1 EP3378801A1 (en) 2018-09-26
EP3378801B1 true EP3378801B1 (en) 2019-12-18

Family

ID=58488938

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17305328.1A Active EP3378801B1 (en) 2017-03-23 2017-03-23 Air gun system

Country Status (2)

Country Link
EP (1) EP3378801B1 (en)
ES (1) ES2779769T3 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2840047B1 (en) * 2002-05-24 2004-08-06 Herve Simoens Sudden air discharge device
DE602005020375D1 (en) * 2004-01-14 2010-05-20 Martin Eng Co Pressure operated vent valve assembly
US7647941B2 (en) * 2006-04-03 2010-01-19 Masao Onoe Air pulser
CN201411181Y (en) * 2009-06-23 2010-02-24 郑州欧亚空气炮有限公司 Fast reset-type air cannon of balance chamber pressurizing piston

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3378801A1 (en) 2018-09-26
ES2779769T3 (en) 2020-08-19

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