EP1164343A1 - Safety device for injection pistol of fluid in a container - Google Patents

Safety device for injection pistol of fluid in a container Download PDF

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Publication number
EP1164343A1
EP1164343A1 EP01401448A EP01401448A EP1164343A1 EP 1164343 A1 EP1164343 A1 EP 1164343A1 EP 01401448 A EP01401448 A EP 01401448A EP 01401448 A EP01401448 A EP 01401448A EP 1164343 A1 EP1164343 A1 EP 1164343A1
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EP
European Patent Office
Prior art keywords
gun
container
relay
detector
fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01401448A
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German (de)
French (fr)
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EP1164343B1 (en
Inventor
Sylvain Derouville
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.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Carboxyque Francaise SA
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Publication of EP1164343A1 publication Critical patent/EP1164343A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/001—Arrangement or mounting of control or safety devices for cryogenic fluid systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F25D3/12—Devices using other cold materials; Devices using cold-storage bodies using solidified gases, e.g. carbon-dioxide snow
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/14—Switches operated by change of acceleration, e.g. by shock or vibration, inertia switch

Definitions

  • the present invention relates to a safety device for fluid injection gun in a container.
  • the CO 2 is taken in liquid form from a tank in which it is located at a high pressure, for example at a pressure of the order of 15 bars.
  • the pistol and the container each have additional mechanical fixing means ensuring their joining during the injection phase.
  • a safety device of the type comprising means for detecting the mechanical connection of the gun to the container, which are arranged in a circuit for controlling the opening of a solenoid valve integrated into the gun to prevent fluid injection in the event of a fault gun connection to the container.
  • the detection means are arranged in the form a switch interposed between the gun and the container. In case of uncoupling, the solenoid valve is deactivated and the power supply is cut off.
  • Another solution is to provide the free end of the gun with a non-return valve automatically cuts the fluid distribution when uncoupled gun and container.
  • the object of the invention is to overcome the drawbacks of the devices security of the state of the art.
  • the detection means include a gun movement and an activatable relay under the control of the movement to control the opening of a switch connected in series in the control circuit to stop the distribution of fluid in the event of detection of gun movement.
  • the fluid injection installation is intended to inject CO 2 into a container 10 for transporting foodstuffs in order to form, by expansion, carbon dioxide snow, in order to allow transport of foodstuffs under controlled temperature.
  • the installation comprises a reservoir 12 of CO 2 , in which the CO 2 is stored in the liquid state, at a high pressure, for example at a pressure of the order of 15 bars.
  • This reservoir 12 communicates, via an insulated pipe 14 provided with valves, such as 16, with an injection gun 18 supported by a bracket 20.
  • the container 10 internally delimits a reservoir 22 of dry ice which is provided with a nozzle 24 provided with means for mechanically fixing the gun to the container 10 ensuring a securing of the reservoir 22 and the gun 18 during CO 2 injection.
  • the gun 18, for its part, is provided with an injection control handle 26 ensuring the control of a solenoid valve 28 to cause the injection of CO 2 into the reservoir 22.
  • the solenoid valve 28 is controlled by a control cabinet 30 placed at a distance from the gun 18 and ensuring, in particular, supply of the solenoid valve with alternative electrical energy.
  • the installation is provided with a safety device 32, integrated in the injection gun 18, and suitable for cutting the supply of the solenoid valve 28 in the event of detection of a fault in the connection of the container 10 and of the gun 18.
  • the safety device comprises a detector 34 for detecting movement of the pistol, forming switch interposed in the solenoid valve supply circuit.
  • the movement 34 is arranged in the form of a cylindrical case 36 made of material electrically conductive in which a ball 38 is also placed electrically conductive.
  • One end of the housing 36 has a tip 40, electrically conductive and isolated from the rest of the housing 36.
  • the housing 36 and the tip 40 are respectively connected to terminals for connecting the motion detection device 34 to the circuit of the solenoid valve 28 of the gun.
  • the housing 36 is mounted in the gun 18 in a position slightly inclined so as to urge the ball 38 away from the tip 40.
  • the device 32 mainly comprises a rectifier bridge 42, conventional type, at the outlet of which is placed a filtering stage 44 constituted by the parallel association of two capacitors C1 and C2.
  • a voltage divider bridge 46 constituted by the association in series with a resistor R and a Zener diode D, is placed in parallel on the stage filter 44.
  • the motion detector 34 is connected, on the one hand, to the point middle of the divider bridge 46 and, on the other hand, in series on a relay 48, which is itself connected to a node of the circuit in common with the rectifier bridge 42, the filtering stage 44 and the divider bridge 46.
  • Relay 48 controls, on the one hand, upon opening, a first switch 50 interposed in series in the supply circuit of the solenoid valve 28 and, on the other hand, when closing, a second switch 52 connected in parallel on the motion detector 34.
  • relay 48 causes the closure of the second switch 52 and maintaining the power supply of this relay 48 which whatever the state of the detector 34.
  • This self-supply of the relay 48 causes the first switch 50 to be kept open and therefore the supply to the solenoid valve 28 to be cut off. CO 2 injection is therefore prevented during the entire phase injection programmed by the control cabinet 30.
  • the security device 32 which has just been described is present in the form of a housing which is connected to the solenoid valve 28, in the latter's supply circuit, and therefore does not require modify the injection gun 18 accordingly.
  • adjusting the sensitivity of the device is very easy: it operates by adjusting the horizontal inclination of the housing 36 during assembly initial or when operating conditions change.
  • motion detection is based on force acceleration of the pistol during a possible stall, which takes into account for all of the above factors, and which is further directly related to damage caused by impact of the pistol against a human operator or against an obstacle.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Nozzles (AREA)
  • Electrostatic Spraying Apparatus (AREA)

Abstract

The safety (32) for a carbon dioxide injection pistol (18) for containers (10) has a sensor for pistol contact with the container connected to a control circuit for opening an electro-valve (28) integrated in the pistol to prevent injection of fluid if there is a loss of contact between the pistol and container. The sensor detects movement of the pistol and a relay (48) actuated under the control of the sensor to open a switch (50) connected in series with the control circuit to stop the fluid feed in case the pistol is moved. The sensor can be an acceleration sensor.

Description

La présente invention est relative à un dispositif de sécurité pour pistolet d'injection de fluide dans un conteneur.The present invention relates to a safety device for fluid injection gun in a container.

Elle s'applique en particulier à un dispositif de sécurité pour pistolet d'injection de CO2 sous pression dans un conteneur pour former, par détente, de la neige carbonique.It applies in particular to a safety device for a gun for injecting CO 2 under pressure into a container to form, by expansion, carbon dioxide snow.

Dans cette application, le CO2 est prélevé sous forme liquide à partir d'un réservoir dans lequel il se situe à une haute pression, par exemple à une pression de l'ordre de 15 bars.In this application, the CO 2 is taken in liquid form from a tank in which it is located at a high pressure, for example at a pressure of the order of 15 bars.

Généralement, pour éviter tout risque d'accident pour le personnel situé à proximité du pistolet, le pistolet et le conteneur sont dotés chacun de moyens de fixation mécaniques complémentaires assurant leur solidarisation au cours de la phase d'injection.Generally, to avoid any risk of accident for personnel located near the pistol, the pistol and the container each have additional mechanical fixing means ensuring their joining during the injection phase.

Dans le cas où le pistolet et le conteneur se désolidarisent, au cours de la phase d'injection, pour éviter tout fouettage du pistolet engendré par la pression du CO2 dans ce dernier et augmenter ainsi la sécurité, on coupe automatiquement l'alimentation du pistolet.In the event that the gun and the container separate, during the injection phase, to avoid any whipping of the gun caused by the pressure of CO 2 in the latter and thus increase safety, the supply of the gun.

A cet effet, on utilise un dispositif de sécurité du type comportant des moyens de détection du raccordement mécanique du pistolet au conteneur, qui sont disposés dans un circuit de commande de l'ouverture d'une électrovanne intégrée au pistolet pour interdire l'injection de fluide en cas de défaut de raccordement du pistolet au conteneur.For this purpose, use is made of a safety device of the type comprising means for detecting the mechanical connection of the gun to the container, which are arranged in a circuit for controlling the opening of a solenoid valve integrated into the gun to prevent fluid injection in the event of a fault gun connection to the container.

Classiquement, les moyens de détection sont agencés sous la forme d'un interrupteur s'interposant entre le pistolet et le conteneur. En cas de désaccouplement, l'électrovanne est désactivée et l'alimentation est coupée.Conventionally, the detection means are arranged in the form a switch interposed between the gun and the container. In case of uncoupling, the solenoid valve is deactivated and the power supply is cut off.

Ce type de technique est désavantageux dans la mesure où il présente un temps de réponse trop long et demande de plus une modification des conditions d'exploitation du matériel.This type of technique is disadvantageous in that it presents response time too long and also requires modification equipment operating conditions.

Une autre solution consiste à doter l'extrémité libre du pistolet d'un clapet anti-retour coupant automatiquement la distribution de fluide dès désaccouplement du pistolet et du conteneur.Another solution is to provide the free end of the gun with a non-return valve automatically cuts the fluid distribution when uncoupled gun and container.

Cette solution présente également un certain nombre d'inconvénients, notamment en raison du fait qu'elle est relativement coûteuse dans la mesure où elle nécessite de prévoir un pistolet d'injection spécifique.This solution also presents a number disadvantages, especially due to the fact that it is relatively expensive insofar as it requires the provision of a specific injection gun.

Un désavantage important des solutions classiques est qu'elles font appel à des pièces mécaniques qui sont sollicitées à une fréquence importante (plusieurs centaines de fois par jour, que le pistolet fonctionne normalement ou pas). Ceci conduit à une usure importante et à un risque de non-fonctionnement du dispositif de sécurité lorsqu'il est sollicité.An important disadvantage of conventional solutions is that they do use of mechanical parts which are used frequently (several hundred times a day, that the gun operates normally or not). This leads to significant wear and a risk of non-operation of the safety device when it is used.

Le but de l'invention est de pallier les inconvénients des dispositifs de sécurité de l'état de la technique.The object of the invention is to overcome the drawbacks of the devices security of the state of the art.

Elle a donc pour objet un dispositif de sécurité du type précité, caractérisé en ce que les moyens de détection comportent un détecteur de mouvement du pistolet et un relais activable sous le contrôle du détecteur de mouvement pour piloter l'ouverture d'un commutateur connecté en série dans le circuit de commande pour stopper la distribution de fluide en cas de détection d'un mouvement du pistolet.It therefore relates to a safety device of the aforementioned type, characterized in that the detection means include a gun movement and an activatable relay under the control of the movement to control the opening of a switch connected in series in the control circuit to stop the distribution of fluid in the event of detection of gun movement.

Ce dispositif de sécurité peut également comporter une ou plusieurs des caractéristiques suivantes, prises isolément ou selon toutes les combinaisons techniquement possibles :

  • le détecteur de mouvement est un détecteur d'accélération ;
  • le détecteur de mouvement comporte une bille en matériau électriquement conducteur disposée dans un cylindre électriquement conducteur muni à l'une de ses extrémités d'une pointe électriquement conductrice isolée du reste du cylindre ;
  • l'inclinaison de l'axe du cylindre est réglable ;
  • le détecteur de mouvement constitue un interrupteur de commande de l'alimentation du relais et comporte en outre un second commutateur en parallèle sur le détecteur de mouvement et piloté à la fermeture par le relais pour maintenir l'alimentation de ce dernier ;
  • le circuit de commande délivrant à l'électrovanne une tension alternative d'alimentation de cette dernière comporte un circuit redresseur, un circuit de filtrage raccordé à la sortie du circuit redresseur et un pont diviseur de tension auquel est raccordé le détecteur de mouvement ;
  • le pont diviseur comporte une résistance et une diode Zener en série ; et
  • le contact entre la bille et la pointe provoque le raccordement du relais au pont diviseur.
This safety device may also include one or more of the following characteristics, taken in isolation or in any technically possible combination:
  • the motion detector is an acceleration detector;
  • the motion detector comprises a ball of electrically conductive material disposed in an electrically conductive cylinder provided at one of its ends with an electrically conductive tip isolated from the rest of the cylinder;
  • the inclination of the cylinder axis is adjustable;
  • the motion detector constitutes a switch for controlling the supply of the relay and further comprises a second switch in parallel with the movement detector and controlled on closing by the relay to maintain the supply of the latter;
  • the control circuit delivering an alternating supply voltage to the solenoid valve comprises a rectifier circuit, a filtering circuit connected to the output of the rectifier circuit and a voltage divider bridge to which the motion detector is connected;
  • the divider bridge includes a resistor and a Zener diode in series; and
  • the contact between the ball and the point causes the relay to be connected to the divider bridge.

D'autres caractéristiques ou avantages ressortiront de la description suivante, donnée uniquement à titre d'exemple, et faite en référence aux dessins annexés sur lesquels :

  • la figure 1 est une vue générale d'une installation d'injection de fluide dans un conteneur ;
  • la figure 2 est une vue de détail de l'installation de la figure 1 montrant la construction d'un pistolet d'injection doté d'un dispositif de sécurité selon l'invention ;
  • la figure 3 montre le circuit électronique du dispositif de sécurité conforme à l'invention ; et
  • la figure 4 est une vue de détail du détecteur de mouvement du dispositif de sécurité de la figure 3.
Other characteristics or advantages will emerge from the following description, given solely by way of example, and made with reference to the appended drawings in which:
  • Figure 1 is a general view of a fluid injection installation in a container;
  • Figure 2 is a detail view of the installation of Figure 1 showing the construction of an injection gun provided with a safety device according to the invention;
  • Figure 3 shows the electronic circuit of the safety device according to the invention; and
  • FIG. 4 is a detailed view of the motion detector of the security device of FIG. 3.

Dans l'exemple de réalisation représenté sur la figure 1, l'installation d'injection de fluide est destinée à injecter du CO2 dans un conteneur 10 de transport de denrées alimentaires pour y former, par détente, de la neige carbonique, afin de permettre un transport des denrées sous température contrôlée.In the embodiment shown in FIG. 1, the fluid injection installation is intended to inject CO 2 into a container 10 for transporting foodstuffs in order to form, by expansion, carbon dioxide snow, in order to allow transport of foodstuffs under controlled temperature.

L'installation comporte un réservoir 12 de CO2, dans lequel le CO2 est conservé à l'état liquide, à une haute pression, par exemple à une pression de l'ordre de 15 bars. Ce réservoir 12 communique, par l'intermédiaire d'une tuyauterie 14 calorifugée dotée de vannes, telles que 16, avec un pistolet d'injection 18 supporté par une potence 20.The installation comprises a reservoir 12 of CO 2 , in which the CO 2 is stored in the liquid state, at a high pressure, for example at a pressure of the order of 15 bars. This reservoir 12 communicates, via an insulated pipe 14 provided with valves, such as 16, with an injection gun 18 supported by a bracket 20.

En se référant également à la figure 2, le conteneur 10 délimite intérieurement un réservoir 22 de neige carbonique qui est doté d'un embout 24 muni de moyens de fixation mécanique du pistolet sur le conteneur 10 assurant une solidarisation du réservoir 22 et du pistolet 18 au cours de l'injection de CO2. Referring also to FIG. 2, the container 10 internally delimits a reservoir 22 of dry ice which is provided with a nozzle 24 provided with means for mechanically fixing the gun to the container 10 ensuring a securing of the reservoir 22 and the gun 18 during CO 2 injection.

Le pistolet 18, quant à lui, est doté d'une mannette 26 de commande d'injection assurant la commande d'une électrovanne 28 pour provoquer l'injection de CO2 dans le réservoir 22.The gun 18, for its part, is provided with an injection control handle 26 ensuring the control of a solenoid valve 28 to cause the injection of CO 2 into the reservoir 22.

Par ailleurs, l'électrovanne 28 est pilotée par une armoire de commande 30 placée à distance du pistolet 18 et assurant, en particulier, l'alimentation de l'électrovanne en énergie électrique alternative.Furthermore, the solenoid valve 28 is controlled by a control cabinet 30 placed at a distance from the gun 18 and ensuring, in particular, supply of the solenoid valve with alternative electrical energy.

Pour couper l'injection de CO2 dans le réservoir 22 en cas de défaut de raccordement du pistolet 18 au conteneur 10, l'installation est dotée d'un dispositif 32 de sécurité, intégré au pistolet d'injection 18, et adapté pour couper l'alimentation de l'électrovanne 28 en cas de détection d'un défaut de raccordement du conteneur 10 et du pistolet 18.To cut the injection of CO 2 into the reservoir 22 in the event of a fault in connection of the gun 18 to the container 10, the installation is provided with a safety device 32, integrated in the injection gun 18, and suitable for cutting the supply of the solenoid valve 28 in the event of detection of a fault in the connection of the container 10 and of the gun 18.

En se référant également aux figures 3 et 4, le dispositif de sécurité comporte un détecteur 34 de détection de mouvement du pistolet, formant interrupteur interposé dans le circuit d'alimentation de l'électrovanne.Referring also to Figures 3 and 4, the safety device comprises a detector 34 for detecting movement of the pistol, forming switch interposed in the solenoid valve supply circuit.

Plus particulièrement, en référence à la figure 4, le détecteur de mouvement 34 est agencé sous la forme d'un boítier cylindrique 36 en matériau électriquement conducteur dans lequel est placée une bille 38 également électriquement conductrice.More particularly, with reference to FIG. 4, the movement 34 is arranged in the form of a cylindrical case 36 made of material electrically conductive in which a ball 38 is also placed electrically conductive.

L'une des extrémités du boítier 36 est dotée d'une pointe 40, électriquement conductrice et isolée du reste du boítier 36.One end of the housing 36 has a tip 40, electrically conductive and isolated from the rest of the housing 36.

Le boítier 36 et la pointe 40 sont respectivement connectés à des bornes de raccordement du dispositif de détection de mouvement 34 au circuit d'alimentation de l'électrovanne 28 du pistolet.The housing 36 and the tip 40 are respectively connected to terminals for connecting the motion detection device 34 to the circuit of the solenoid valve 28 of the gun.

Par ailleurs, le boítier 36 est monté dans le pistolet 18 selon une position légèrement inclinée de façon à solliciter la bille 38 à distance de la pointe 40.Furthermore, the housing 36 is mounted in the gun 18 in a position slightly inclined so as to urge the ball 38 away from the tip 40.

Dès lors, dans cette position, l'interrupteur constitué par la paroi du boítier 36, la bille 38 et la pointe 40 est sollicité à l'état ouvert.Therefore, in this position, the switch formed by the wall of the housing 36, the ball 38 and the tip 40 is biased in the open state.

En se référant plus particulièrement à la figure 3, on voit que le dispositif de contrôle 32 comporte principalement un pont redresseur 42, de type classique, en sortie duquel est placé un étage de filtrage 44 constitué par l'association en parallèle de deux condensateurs C1 et C2. Referring more particularly to FIG. 3, it can be seen that the device 32 mainly comprises a rectifier bridge 42, conventional type, at the outlet of which is placed a filtering stage 44 constituted by the parallel association of two capacitors C1 and C2.

Un pont diviseur de tension 46, constitué par l'association en série d'une résistance R et d'une diode Zener D, est placé en parallèle sur l'étage de filtrage 44.A voltage divider bridge 46, constituted by the association in series with a resistor R and a Zener diode D, is placed in parallel on the stage filter 44.

Le détecteur de mouvement 34 est raccordé, d'une part, au point milieu du pont diviseur 46 et, d'autre part, en série sur un relais 48, qui est lui-même raccordé à un noeud du circuit en commun avec le pont redresseur 42, l'étage de filtrage 44 et le pont diviseur 46.The motion detector 34 is connected, on the one hand, to the point middle of the divider bridge 46 and, on the other hand, in series on a relay 48, which is itself connected to a node of the circuit in common with the rectifier bridge 42, the filtering stage 44 and the divider bridge 46.

Le relais 48 pilote, d'une part, à l'ouverture, un premier commutateur 50 interposé en série dans le circuit d'alimentation de l'électrovanne 28 et, d'autre part, à la fermeture, un deuxième commutateur 52 connecté en parallèle sur le détecteur de mouvement 34.Relay 48 controls, on the one hand, upon opening, a first switch 50 interposed in series in the supply circuit of the solenoid valve 28 and, on the other hand, when closing, a second switch 52 connected in parallel on the motion detector 34.

Ainsi, en cas de défaut de raccordement mécanique du pistolet 18 sur le conteneur 10, lors de l'injection de CO2, le mouvement du pistolet 18, détecté par le détecteur de mouvement 34 lorsque la bille entre en contact avec la pointe 40, provoque l'alimentation du relais 48, l'ouverture consécutive du premier commutateur 50 et donc la coupure de l'alimentation de l'électrovanne.Thus, in the event of a fault in the mechanical connection of the gun 18 to the container 10, during the injection of CO 2 , the movement of the gun 18, detected by the motion detector 34 when the ball comes into contact with the tip 40, causes the supply of the relay 48, the consecutive opening of the first switch 50 and therefore the interruption of the supply of the solenoid valve.

Le mouvement du pistolet est dès lors stoppé.The movement of the pistol is therefore stopped.

Par ailleurs, l'alimentation du relais 48 provoque la fermeture du second commutateur 52 et le maintien de l'alimentation de ce relais 48 quel que soit l'état du détecteur 34.Furthermore, the supply of relay 48 causes the closure of the second switch 52 and maintaining the power supply of this relay 48 which whatever the state of the detector 34.

Cette auto-alimentation du relais 48 provoque le maintien à l'état ouvert du premier commutateur 50 et donc le maintien de la coupure de l'alimentation de l'électrovanne 28. On empêche dès lors l'injection de CO2 pendant toute la phase d'injection programmée par l'armoire de commande 30.This self-supply of the relay 48 causes the first switch 50 to be kept open and therefore the supply to the solenoid valve 28 to be cut off. CO 2 injection is therefore prevented during the entire phase injection programmed by the control cabinet 30.

On notera que le dispositif de sécurité 32 qui vient d'être décrit se présente sous la forme d'un boítier venant se brancher sur l'électrovanne 28, dans le circuit d'alimentation de cette dernière, et ne nécessite donc pas de modifier en conséquence le pistolet d'injection 18.It will be noted that the security device 32 which has just been described is present in the form of a housing which is connected to the solenoid valve 28, in the latter's supply circuit, and therefore does not require modify the injection gun 18 accordingly.

Il peut donc venir équiper tout type de pistolet d'injection sans nécessité de modification notable de leur structure interne. It can therefore be fitted to any type of injection gun without need significant change in their internal structure.

Par ailleurs, le réglage de la sensibilité du dispositif est très facile : il s'opère par réglage de l'inclinaison horizontale du boítier 36 lors du montage initial ou lors de modifications des conditions de fonctionnement.Furthermore, adjusting the sensitivity of the device is very easy: it operates by adjusting the horizontal inclination of the housing 36 during assembly initial or when operating conditions change.

On peut ainsi adapter le boítier à des fluides différents, à des positions de raccordement différentes, à des pressions d'injection différentes, à des pistolets de masse faible ou importante.We can thus adapt the housing to different fluids, to positions connection points, at different injection pressures, at pistols of low or large mass.

On notera que la détection de mouvement est basée sur la force d'accélération du pistolet lors d'un éventuel décrochage, qui prend en compte tous les facteurs ci-dessus, et qui est de plus directement liée aux dégâts provoqués lors d'un choc du pistolet contre un opérateur humain ou contre un obstacle.Note that motion detection is based on force acceleration of the pistol during a possible stall, which takes into account account for all of the above factors, and which is further directly related to damage caused by impact of the pistol against a human operator or against an obstacle.

Claims (8)

Dispositif de sécurité pour pistolet (18) d'injection de fluide dans un conteneur (10), comprenant des moyens de détection du raccordement mécanique du pistolet au conteneur qui sont disposés dans un circuit de commande de l'ouverture d'une électrovanne (28) intégrée au pistolet (18) pour interdire l'injection de fluide en cas de défaut de raccordement du pistolet (18) au conteneur (10), caractérisé en ce que les moyens de détection comportent un détecteur (34) de mouvement du pistolet et un relais (48) activable sous le contrôle du détecteur de mouvement (34) pour piloter l'ouverture d'un commutateur (50) connecté en série dans le circuit de commande pour stopper la distribution du fluide en cas de détection d'un mouvement du pistolet (18).Safety device for a gun (18) for injecting fluid into a container (10), comprising means for detecting the mechanical connection of the gun to the container which are arranged in a circuit for controlling the opening of a solenoid valve (28 ) integrated in the gun (18) to prohibit the injection of fluid in the event of failure to connect the gun (18) to the container (10), characterized in that the detection means comprise a detector (34) of movement of the gun and a relay (48) activatable under the control of the movement detector (34) to control the opening of a switch (50) connected in series in the control circuit to stop the distribution of the fluid in the event of detection of a movement gun (18). Dispositif selon la revendication 1, caractérisé en ce que le détecteur de mouvement (34) est un détecteur d'accélération.Device according to claim 1, characterized in that the motion detector (34) is an acceleration detector. Dispositif selon la revendication 2, caractérisé en ce que le détecteur de mouvement (34) comporte une bille (38) en matériau électriquement conducteur disposée dans un cylindre (36) électriquement conducteur muni à l'une de ses extrémités d'une pointe (40) électriquement conductrice isolée du reste du cylindre.Device according to claim 2, characterized in that the movement detector (34) comprises a ball (38) of electrically conductive material arranged in an electrically conductive cylinder (36) provided at one end with a point (40 ) electrically conductive isolated from the rest of the cylinder. Dispositif selon la revendication 3, caractérisé en ce que l'inclinaison de l'axe du cylindre est réglable.Device according to claim 3, characterized in that the inclination of the axis of the cylinder is adjustable. Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le détecteur de mouvement constitue un interrupteur de commande de l'alimentation du relais et en ce qu'il comporte en outre un second commutateur (52) en parallèle sur le détecteur de mouvement (34) et piloté à la fermeture par le relais pour maintenir l'alimentation de ce dernier.Device according to any one of Claims 1 to 4, characterized in that the motion detector constitutes a switch for controlling the supply of the relay and in that it also comprises a second switch (52) in parallel on the motion detector (34) and controlled on closing by the relay to maintain the supply of the latter. Dispositif selon la revendication 5, caractérisé en ce que le circuit de commande délivrant à l'électrovanne une tension alternative d'alimentation de cette dernière, il comporte un circuit redresseur (42), un circuit de filtrage (44) raccordé à la sortie du circuit redresseur (42) et un pont diviseur de tension (46) auquel est raccordé le détecteur de mouvement (34). Device according to Claim 5, characterized in that the control circuit delivering an alternating supply voltage to the solenoid valve, it comprises a rectifier circuit (42), a filtering circuit (44) connected to the output of the rectifier circuit (42) and a voltage divider bridge (46) to which the motion detector (34) is connected. Dispositif selon la revendication 6, caractérisé en ce que le pont diviseur comporte une résistance (R) et une diode Zener (D) en série.Device according to claim 6, characterized in that the divider bridge comprises a resistor (R) and a Zener diode (D) in series. Dispositif selon la revendication 3 ou 4 prise ensemble avec la revendication 6 ou 7, caractérisé en ce que le contact entre la bille (38) et la pointe (40) provoque le raccordement du relais (48) au pont diviseur (46).Device according to claim 3 or 4 taken together with claim 6 or 7, characterized in that the contact between the ball (38) and the tip (40) causes the connection of the relay (48) to the divider bridge (46).
EP20010401448 2000-06-16 2001-06-05 Safety device for injection pistol of fluid in a container Expired - Lifetime EP1164343B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0007717A FR2810262B1 (en) 2000-06-16 2000-06-16 SECURITY DEVICE FOR A FLUID INJECTION GUN IN A CONTAINER
FR0007717 2000-06-16

Publications (2)

Publication Number Publication Date
EP1164343A1 true EP1164343A1 (en) 2001-12-19
EP1164343B1 EP1164343B1 (en) 2004-11-17

Family

ID=8851344

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010401448 Expired - Lifetime EP1164343B1 (en) 2000-06-16 2001-06-05 Safety device for injection pistol of fluid in a container

Country Status (4)

Country Link
EP (1) EP1164343B1 (en)
DE (1) DE60107148T2 (en)
ES (1) ES2233578T3 (en)
FR (1) FR2810262B1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5379811A (en) * 1992-10-19 1995-01-10 Emco Wheaton, Inc. Fuel dispensing nozzle
FR2726353A1 (en) * 1994-10-26 1996-05-03 Carboxyque Francaise Automatic control of chilling of stored food products
US5543767A (en) * 1995-02-02 1996-08-06 Elenbaas; George H. Electrical switch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5379811A (en) * 1992-10-19 1995-01-10 Emco Wheaton, Inc. Fuel dispensing nozzle
FR2726353A1 (en) * 1994-10-26 1996-05-03 Carboxyque Francaise Automatic control of chilling of stored food products
US5543767A (en) * 1995-02-02 1996-08-06 Elenbaas; George H. Electrical switch

Also Published As

Publication number Publication date
FR2810262A1 (en) 2001-12-21
DE60107148T2 (en) 2005-12-15
FR2810262B1 (en) 2002-08-30
ES2233578T3 (en) 2005-06-16
DE60107148D1 (en) 2004-12-23
EP1164343B1 (en) 2004-11-17

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