EP2243995B1 - Leak detection device for a LPG distribution installation - Google Patents

Leak detection device for a LPG distribution installation Download PDF

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Publication number
EP2243995B1
EP2243995B1 EP10305379A EP10305379A EP2243995B1 EP 2243995 B1 EP2243995 B1 EP 2243995B1 EP 10305379 A EP10305379 A EP 10305379A EP 10305379 A EP10305379 A EP 10305379A EP 2243995 B1 EP2243995 B1 EP 2243995B1
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EP
European Patent Office
Prior art keywords
lpg
phase
current
line
control circuit
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.)
Not-in-force
Application number
EP10305379A
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German (de)
French (fr)
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EP2243995A1 (en
Inventor
Philippe Cloutier
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Tokheim Holding BV
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Tokheim Holding BV
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Priority to PL10305379T priority Critical patent/PL2243995T3/en
Publication of EP2243995A1 publication Critical patent/EP2243995A1/en
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Publication of EP2243995B1 publication Critical patent/EP2243995B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0326—Valves electrically actuated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0341—Filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0352—Pipes
    • F17C2205/0367—Arrangements in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0376—Dispensing pistols
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/035—Propane butane, e.g. LPG, GPL
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
    • F17C2223/042—Localisation of the removal point
    • F17C2223/046—Localisation of the removal point in the liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0146—Two-phase
    • F17C2225/0153—Liquefied gas, e.g. LPG, GPL
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0135—Pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/03—Control means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0486—Indicating or measuring characterised by the location
    • F17C2250/0495—Indicating or measuring characterised by the location the indicated parameter is a converted measured parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/03—Dealing with losses
    • F17C2260/035—Dealing with losses of fluid
    • F17C2260/036—Avoiding leaks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/06—Fluid distribution
    • F17C2265/065—Fluid distribution for refueling vehicle fuel tanks

Definitions

  • the present invention relates to a device for detecting leaks in a liquefied petroleum gas (LPG) distribution system.
  • LPG liquefied petroleum gas
  • LPG which consists essentially of a mixture of butane and propane from petroleum refining and natural gas processing, is a fuel that is increasingly used.
  • Such installations essentially comprise a buried LPG storage tank associated with at least one dispensing device.
  • LPG is stored under its own vapor pressure, so that the storage tank contains a liquid LPG phase surmounted by a vapor LPG phase.
  • the dispensing apparatus is conventionally equipped with a flexible hose on which is connected a dispensing nozzle, a volumetric meter associated with electronic counting and display devices, as well as LPG degassing devices. liquid phase to distribute.
  • This return line is associated with a return pump which is generally mounted to the inner part of the dispensing device.
  • the LPG transfer and return lines consist of buried pipelines.
  • the LPG distribution operations in the vehicle tank are controlled from a central computer via a controller connected to the transfer pump and to the transferred liquid phase LPG flow control solenoid valve.
  • LPG lines in the liquid phase and LPG vapor return lines were produced in many countries from welded metal pipe elements.
  • the object of the present invention is to propose a device for detecting leaks in a LPG distribution installation making it possible to carry out such a detection very easily and at a lower cost, while avoiding having to dig up the pipes installed. .
  • the present invention relates to a leak detection device of the aforementioned type essentially comprising two pressure switches calibrated at a threshold value.
  • These elements are on the one hand respectively connected to the LPG transfer line in the liquid phase and on the LPG return line in the vapor phase and, on the other hand, connected in series to an electrical control circuit, generally supplied with electricity. current from the network, preferably via a transformer.
  • the pressure switches close the electrical control circuit when the LPG pressure in the liquid phase circulating in the transfer line and the LPG pressure in the vapor phase circulating in the return line are greater than the threshold value while they open this circuit when one of these pressures becomes lower than the threshold value so as to prevent the passage of current in it.
  • the leak detection device also comprises means for detecting the passage of current in the electrical control circuit which are associated with the central computer so as to make it possible to trigger an alarm and / or to control the interruption of the distribution of LPG in the absence of current in this circuit.
  • the lack of current in the electrical control circuit is in fact interpreted by the central computer as representative of the presence of LPG leaks in the LPG transfer line in the liquid phase and / or in the LPG return line in phase. steam.
  • the LPG distribution installation can preferably be restarted only after authorization by an authorized person.
  • the means for detecting the passage of current in the electrical control circuit consist of an electromechanical relay comprising a coil mounted on this circuit in series with the two pressure switches and a contact which closes under the action of the electromagnetic field induced by the current flowing through this coil to transmit a correct operating signal to the central computer.
  • this calculator In the absence of such a signal, this calculator detects the presence of a leak and triggers an alarm and / or orders the interruption of the distribution of LPG.
  • the LPG distribution system essentially comprises a buried storage tank 1 and a dispensing device 6 which is shown schematically.
  • the storage tank 1 contains a LPG fraction in the liquid phase 2 surmounted by a fraction of LPG in the vapor phase 3.
  • the dispensing apparatus 6 is conventionally equipped with a flexible hose to which is connected a dispensing nozzle, a volumetric meter associated with electronic counting and display devices as well as LPG degassing members in the liquid phase. distribute.
  • a liquid phase LPG transfer line 4 connects the storage tank 1 to the dispensing apparatus 6 so as to allow delivery of liquid LPG to the tank of motor vehicles.
  • This transfer line 4 is conventionally equipped with nonreturn valves 41, 47 and solenoid valves 45, 48 enabling or blocking the transfer of LPG in the liquid phase to the dispensing device 6.
  • This transfer is ensured by a transfer pump 42 mounted downstream of the first non-return valve 41 in the direction of LPG circulation, at the outlet of the storage tank 1, so as to suck LPG in the liquid phase 2 stored in this tank .
  • the transfer pump 42 is driven by a variable speed motor 43 whose speed is controlled from a central computer 8 via a controller 44.
  • This controller 44 is also connected to the solenoid valve 45 to enable control of the opening or closing thereof on instruction of the central computer 8 and notify the end of the delivery.
  • the LPG transfer line in the liquid phase 4 is furthermore equipped with a filter 46, in particular of the "Y" type, making it possible to eliminate the solid impurities that may be present in the LPG in the transferred liquid phase.
  • the LPG distribution system also comprises a return line 5 in the storage tank 1 of the LPG in the vapor phase separated by the degassing members equipping the dispensing device 6.
  • the separated vapor phase LPG is reintroduced into the vapor LPG phase 3 at the top of the storage tank 1 where the return line 5 opens.
  • the return line 5 is further equipped with non-return valves 51, 57 and a solenoid valve 58.
  • two pressure switches 7a, 7b calibrated at a threshold value are respectively connected to the transfer line 4 and to the return line 5 and are connected in series to an electrical control circuit 9 which will be described in more detail in the following this presentation.
  • this electrical control circuit 9 is connected to the central computer 8 so as to detect the presence of LPG leaks in the transfer line 4 or in the return line 5.
  • the normal operating pressure is between 7 and 15 bar and can be limited to 23 bar by safety valves calibrated accordingly.
  • the two pressure switches 7a, 7b can, for example, be calibrated to a threshold value of 4 bars, this threshold value not being necessarily the same for the two pressure switches.
  • the electrical control circuit 9 on which the two pressure switches 7a, 7b are connected in series is connected to the central electrical network 10 of voltage 220 volts and supplied with current by a transformer 13 which makes it possible to convert the electrical input voltage of 220 Volts at an output voltage, typically 12 volts or 24 volts.
  • phase electrical wires ⁇ and that of the neutral N of the network 10 are connected to two terminals 11.
  • a wire directly connects the neutral terminal to the transformer 13 while the phase terminal is connected to this transformer via a protective circuit breaker 12.
  • the contacts 71a, 71b of the pressure switches 7a, 7b make it possible to control the opening or the closing of the electric control circuit 9.
  • the electrical control circuit 9 is closed in the case of normal operation, that is to say when the LPG pressure in the liquid phase in the transfer line 4 and the LPG pressure in the vapor phase in the return line 5 are greater than the threshold value, and opens automatically when one of these pressures becomes lower than this threshold value to prevent the flow of current in this circuit 9.
  • the electrical control circuit 9 also comprises an electromechanical relay 15 comprising a coil 16 mounted on this circuit 9 in series with the pressure switches 7a and 7b and a contact 17 whose two terminals are connected to the central computer 8.
  • the central computer 8 then receives a signal RD ("Received Data”) and transmits in response to this signal a signal TD ("Transmit Data”) representative of a normal operation of the distribution facility.
  • RD Receiveived Data
  • TD Transmit Data
  • a fuse 14 makes it possible to limit the current flowing in the electronic control circuit 9 to a maximum value so as to protect the pressure switches 7a, 7b.
  • the transformer 13, the pressure switches 7a, 7b, the fuse 14 and the coil 16 of the electromechanical relay 15 are thus connected in series to the electrical control circuit 9.
  • the mode of operation of the device according to the invention is as follows:
  • the coil 16 of the relay 15 is thus supplied with current and induces an electromagnetic field causing the closing of the contact 17 of the electromechanical relay 15.
  • the central computer 8 thus receives a signal and thus detects a correct operation of the installation.
  • the LPG pressure flowing in at least one of these lines 4, 5 falls and becomes lower than the threshold value so that the contact 71a, 71b of the associated pressure switch 7a, 7b opens.
  • the current can no longer pass through the electronic control circuit 9, in particular in the coil 16 of the electromechanical relay 15, and the contact 17 of this relay therefore remains open.
  • the central computer 8 receives no signal and interprets this absence of signal as representative of the presence of leaks on at least one of the transfer lines 4 or 5.
  • the central computer 8 then sends back a signal to trigger an alarm and / or to control the interruption of the distribution of LPG.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

The device has a buried liquefied petroleum gas (LPG) storage tank (1) containing an LPG liquid phase (2) surmounted by an LPG vapor phase (3). A distributing apparatus (6) is equipped with a flexible pipe on which a dispensing nozzle is connected. A central controller (8) is connected to a controller (44) for controlling a transfer pump (42) and an electro valve (45). A detection unit detects passage of current in an electric control circuit (9) to trigger an alarm and/or to control interruption of distribution of LPG in absence of current in the circuit.

Description

La présente invention a pour objet un dispositif de détection de fuites dans une installation de distribution de gaz de pétrole liquéfié (GPL).The present invention relates to a device for detecting leaks in a liquefied petroleum gas (LPG) distribution system.

Le GPL qui est essentiellement constitué d'un mélange de butane et de propane issu du raffinage du pétrole et du traitement du gaz naturel correspond à un carburant de plus en plus fréquemment utilisé.LPG, which consists essentially of a mixture of butane and propane from petroleum refining and natural gas processing, is a fuel that is increasingly used.

Il s'agit en effet là d'un carburant considéré comme propre qui présente de surcroît l'avantage de préserver les performances des véhicules et de réduire l'usure des moteurs, ce tout en générant moins de bruit et de vibrations que les carburants classiques.This is indeed a fuel considered clean, which has the additional advantage of preserving vehicle performance and reducing engine wear, while generating less noise and vibration than conventional fuels. .

Par suite, l'utilisation de véhicules fonctionnant au GPL est actuellement encouragée par les Autorités et de plus en plus de stations-service sont équipées d'installations de distribution de GPL. Une telle installation est divulguée par EP 1 450 097 A2 , considéré comme art antérieur le plus proche.As a result, the use of LPG vehicles is being promoted by the Authorities and more and more service stations are equipped with LPG distribution facilities. Such an installation is disclosed by EP 1 450 097 A2 , considered the closest prior art.

De telles installations comportent essentiellement un réservoir de stockage de GPL, enterré associé à au moins un appareil distributeur.Such installations essentially comprise a buried LPG storage tank associated with at least one dispensing device.

Le GPL est stocké sous sa propre pression de vapeur, de sorte que le réservoir de stockage contient une phase de GPL liquide surmontée par une phase de GPL vapeur.LPG is stored under its own vapor pressure, so that the storage tank contains a liquid LPG phase surmounted by a vapor LPG phase.

L'appareil distributeur est quant à lui classiquement équipé d'un tuyau flexible sur lequel est branché un pistolet distributeur, d'un mesureur volumétrique associé à des organes de comptage et d'affichage électroniques, ainsi que d'organes de dégazage du GPL en phase liquide à distribuer.The dispensing apparatus is conventionally equipped with a flexible hose on which is connected a dispensing nozzle, a volumetric meter associated with electronic counting and display devices, as well as LPG degassing devices. liquid phase to distribute.

Les installations de distribution de GPL sont également équipées:

  • d'une ligne de transfert de GPL en phase liquide reliant le réservoir de stockage à l'appareil distributeur et muni d'une pompe de transfert ainsi que d'au moins une électrovanne permettant ou bloquant le passage du liquide transféré, et
  • d'une ligne de retour du GPL en phase vapeur séparé par les organes de dégazage équipant l'appareil distributeur et reliant cet appareil au réservoir de stockage.
LPG distribution facilities are also equipped with:
  • a liquid-phase LPG transfer line connecting the storage tank to the dispensing apparatus and provided with a transfer pump and at least one solenoid valve allowing or blocking the passage of the transferred liquid, and
  • a return line LPG vapor separated by the degassing members equipping the dispensing apparatus and connecting this apparatus to the storage tank.

Cette ligne de retour est associée à une pompe de retour qui est en règle générale montée à la partie interne de l'appareil distributeur.This return line is associated with a return pump which is generally mounted to the inner part of the dispensing device.

Les lignes de transfert et de retour du GPL sont constituées par des canalisations enterrées.The LPG transfer and return lines consist of buried pipelines.

Les opérations de distribution de GPL dans le réservoir de véhicules sont commandées à partir d'un calculateur central via un contrôleur relié à la pompe de transfert et à l'électrovanne de réglage du débit de GPL en phase liquide transféré.The LPG distribution operations in the vehicle tank are controlled from a central computer via a controller connected to the transfer pump and to the transferred liquid phase LPG flow control solenoid valve.

Jusqu'à ces dernières années, les canalisations des lignes de transfert de GPL en phase liquide et de retour de GPL en phase vapeur étaient réalisées dans de nombreux pays à partir d'éléments de conduites métalliques assemblés par soudage.Until recently, LPG lines in the liquid phase and LPG vapor return lines were produced in many countries from welded metal pipe elements.

De telles canalisations souterraines présentent l'inconvénient de s'oxyder et de se détériorer dans le temps en raison de l'humidité du GPL circulant dans celles-ci.Such underground pipes have the disadvantage of oxidizing and deteriorating over time due to the moisture of the LPG circulating in them.

Ces phénomènes entraînent des risques de fuites de GPL qui peuvent avoir de graves conséquences dans la mesure où ce carburant présente la caractéristique d'être très inflammable et explosif.These phenomena lead to risks of leaks of LPG which can have serious consequences insofar as this fuel has the characteristic of being very flammable and explosive.

Ce risque d'explosion est d'autant plus important qu'en cas de fuites, le carburant en phase liquide circulant dans les canalisations est dépressurisé et est porté en ébullition.This risk of explosion is even more important in case of leaks, the liquid phase fuel flowing in the pipes is depressurized and is boiled.

De plus, des fuites de GPL entraînent une pollution de l'environnement et de surcroît des pertes financières non négligeables pour les gérants des installations de distribution.In addition, leaks of LPG lead to environmental pollution and, in addition, significant financial losses for the managers of the distribution facilities.

Pour remédier à ces inconvénients, les canalisations métalliques sont maintenant remplacées par des canalisations en matière plastique, en particulier des canalisations thermoformées, et toutes les nouvelles installations de distribution de GPL qui sont actuellement construites sont ainsi équipées.To overcome these drawbacks, the metal pipes are now replaced by plastic pipes, especially thermoformed pipes, and all new LPG distribution facilities that are currently built are thus equipped.

En revanche, les canalisations métalliques des anciennes installations ne sont que très rarement remplacées par des canalisations en matière plastique.On the other hand, the metal pipes of the old installations are only very rarely replaced by plastic pipes.

En effet, les canalisations étant enterrées, il est impossible de détecter une fuite.Indeed, the pipes being buried, it is impossible to detect a leak.

De surcroît, si une fuite est supposée (à partir par exemple de différences entre le volume délivré et le volume initialement présent dans le réservoir de stockage), le seul moyen d'en avoir la preuve est de déterrer les conduites.Moreover, if a leak is assumed (for example from differences between the delivered volume and the volume initially present in the storage tank), the only way to have the proof is to unearth the pipes.

Or, et en raison du coût très important des travaux nécessaires et de la durée d'immobilisation de l'installation entraînée par ces travaux, un tel remplacement n'est pas possible dans la pratique, surtout sur de simples suppositions.However, and because of the very high cost of the necessary work and the downtime of the installation resulting from these works, such a replacement is not possible in practice, especially on mere assumptions.

Par suite, le remplacement de l'installation n'est envisagé que lorsque l'on est quasiment certain de la présence de fuites et que la perte financière se révèle trop importante.Consequently, the replacement of the installation is only envisaged when one is almost certain of the presence of leaks and that the financial loss proves too important.

Dans ce contexte, la présente invention a pour objet de proposer un dispositif de détection de fuites dans une installation de distribution de GPL permettant d'effectuer une telle détection très facilement et à moindre coût, ce en évitant d'avoir à déterrer les canalisations installées.In this context, the object of the present invention is to propose a device for detecting leaks in a LPG distribution installation making it possible to carry out such a detection very easily and at a lower cost, while avoiding having to dig up the pipes installed. .

A cet effet, la présente invention concerne un dispositif de détection de fuites du type susmentionné comportant essentiellement deux pressostats calibrés à une valeur de seuil.For this purpose, the present invention relates to a leak detection device of the aforementioned type essentially comprising two pressure switches calibrated at a threshold value.

Ces éléments sont d'une part respectivement branchés sur la ligne de transfert de GPL en phase liquide et sur la ligne de retour de GPL en phase vapeur et d'autre part montés en série sur un circuit électrique de contrôle, en règle générale alimenté en courant à partir du réseau, de préférence par l'intermédiaire d'un transformateur.These elements are on the one hand respectively connected to the LPG transfer line in the liquid phase and on the LPG return line in the vapor phase and, on the other hand, connected in series to an electrical control circuit, generally supplied with electricity. current from the network, preferably via a transformer.

Les pressostats ferment le circuit électrique de contrôle lorsque la pression du GPL en phase liquide circulant dans la ligne de transfert et la pression du GPL en phase vapeur circulant dans la ligne de retour sont supérieures à la valeur de seuil tandis qu'ils ouvrent ce circuit lorsque l'une de ces pression devient inférieure à la valeur de seuil de façon à empêcher le passage du courant dans celui-ci.The pressure switches close the electrical control circuit when the LPG pressure in the liquid phase circulating in the transfer line and the LPG pressure in the vapor phase circulating in the return line are greater than the threshold value while they open this circuit when one of these pressures becomes lower than the threshold value so as to prevent the passage of current in it.

Selon l'invention, le dispositif de détection de fuites comporte également des moyens de détection du passage du courant dans le circuit électrique de contrôle qui sont associés au calculateur central de façon à permettre de déclencher une alarme et/ou de commander l'interruption de la distribution de GPL en l'absence de courant dans ce circuit.According to the invention, the leak detection device also comprises means for detecting the passage of current in the electrical control circuit which are associated with the central computer so as to make it possible to trigger an alarm and / or to control the interruption of the distribution of LPG in the absence of current in this circuit.

L'absence de courant dans le circuit électrique de contrôle est en effet interprétée par le calculateur central comme représentative de la présence de fuites de GPL dans la ligne de transfert de GPL en phase liquide et/ou dans la ligne de retour de GPL en phase vapeur.The lack of current in the electrical control circuit is in fact interpreted by the central computer as representative of the presence of LPG leaks in the LPG transfer line in the liquid phase and / or in the LPG return line in phase. steam.

Selon l'invention, après la détection de fuites, l'installation de distribution de GPL ne peut de préférence être remise en route qu'après autorisation d'une personne habilitée.According to the invention, after the detection of leaks, the LPG distribution installation can preferably be restarted only after authorization by an authorized person.

Selon une caractéristique préférentielle de l'invention, les moyens de détection du passage du courant dans le circuit électrique de contrôle sont constitués par un relais électromécanique comportant une bobine montée sur ce circuit en série avec les deux pressostats ainsi qu'un contact qui se ferme sous l'action du champ électromagnétique induit par le courant traversant cette bobine pour transmettre un signal de fonctionnement correct au calculateur central.According to a preferred characteristic of the invention, the means for detecting the passage of current in the electrical control circuit consist of an electromechanical relay comprising a coil mounted on this circuit in series with the two pressure switches and a contact which closes under the action of the electromagnetic field induced by the current flowing through this coil to transmit a correct operating signal to the central computer.

En l'absence d'un tel signal, ce calculateur détecte la présence d'une fuite et déclenche une alarme et/ou commande l'interruption de la distribution de GPL.In the absence of such a signal, this calculator detects the presence of a leak and triggers an alarm and / or orders the interruption of the distribution of LPG.

Les caractéristiques du dispositif de détection de fuites qui fait l'objet de l'invention seront décrites plus en détail en se référant aux dessins non limitatifs annexés dans lesquels :

  • la figure 1 est une représentation schématique d'une installation de distribution de GPL équipée d'un dispositif de détection de fuites conforme à l'invention,
  • la figure 2 est une représentation schématique du circuit électrique de contrôle.
The characteristics of the leak detection device which is the subject of the invention will be described in more detail with reference to the appended nonlimiting drawings in which:
  • the figure 1 is a schematic representation of a LPG distribution installation equipped with a leak detection device according to the invention,
  • the figure 2 is a schematic representation of the electrical control circuit.

Selon la figure 1, l'installation de distribution de GPL comporte essentiellement un réservoir de stockage enterré 1 ainsi qu'un appareil distributeur 6 qui est représenté schématiquement.According to figure 1 , the LPG distribution system essentially comprises a buried storage tank 1 and a dispensing device 6 which is shown schematically.

Le réservoir de stockage 1 renferme une fraction de GPL en phase liquide 2 surmontée par une fraction de GPL en phase vapeur 3.The storage tank 1 contains a LPG fraction in the liquid phase 2 surmounted by a fraction of LPG in the vapor phase 3.

L'appareil distributeur 6 est classiquement équipé d'un tuyau flexible sur lequel est branché un pistolet distributeur, d'un mesureur volumétrique associé à des organes de comptage et d'affichage électroniques ainsi que d'organes de dégazage du GPL en phase liquide à distribuer.The dispensing apparatus 6 is conventionally equipped with a flexible hose to which is connected a dispensing nozzle, a volumetric meter associated with electronic counting and display devices as well as LPG degassing members in the liquid phase. distribute.

Ces différents éléments ne sont pas représentés.These different elements are not represented.

Selon la figure 1, une ligne de transfert de GPL en phase liquide 4 relie le réservoir de stockage 1 à l'appareil distributeur 6 de façon à permettre la livraison de GPL en phase liquide dans le réservoir de véhicules automobiles.According to figure 1 a liquid phase LPG transfer line 4 connects the storage tank 1 to the dispensing apparatus 6 so as to allow delivery of liquid LPG to the tank of motor vehicles.

Cette ligne de transfert 4 est classiquement équipée de clapets anti-retour 41, 47 et d'électrovannes 45, 48 permettant ou bloquant le transfert du GPL en phase liquide vers l'appareil distributeur 6.This transfer line 4 is conventionally equipped with nonreturn valves 41, 47 and solenoid valves 45, 48 enabling or blocking the transfer of LPG in the liquid phase to the dispensing device 6.

Ce transfert est assuré par une pompe de transfert 42 montée en aval du premier clapet anti-retour 41 dans le sens de circulation du GPL, en sortie du réservoir de stockage 1, de façon à aspirer le GPL en phase liquide 2 stocké dans ce réservoir.This transfer is ensured by a transfer pump 42 mounted downstream of the first non-return valve 41 in the direction of LPG circulation, at the outlet of the storage tank 1, so as to suck LPG in the liquid phase 2 stored in this tank .

La pompe de transfert 42 est entraînée par un moteur à vitesse variable 43 dont la vitesse est commandée à partir d'un ordinateur central 8 via un contrôleur 44.The transfer pump 42 is driven by a variable speed motor 43 whose speed is controlled from a central computer 8 via a controller 44.

Ce contrôleur 44 est également relié à l'électrovanne 45 pour permettre la commande de l'ouverture ou de la fermeture de celle-ci sur instruction du calculateur central 8 et notifier la fin de la livraison.This controller 44 is also connected to the solenoid valve 45 to enable control of the opening or closing thereof on instruction of the central computer 8 and notify the end of the delivery.

La ligne de transfert de GPL en phase liquide 4 est en outre équipée d'un filtre 46, notamment de type « en Y » permettant d'éliminer les impuretés solides pouvant être présentes dans le GPL en phase liquide transféré.The LPG transfer line in the liquid phase 4 is furthermore equipped with a filter 46, in particular of the "Y" type, making it possible to eliminate the solid impurities that may be present in the LPG in the transferred liquid phase.

Selon la figure 1, l'installation de distribution de GPL comporte également une ligne de retour 5 dans le réservoir de stockage 1 du GPL en phase vapeur séparé par les organes de dégazage équipant l'appareil distributeur 6.According to figure 1 the LPG distribution system also comprises a return line 5 in the storage tank 1 of the LPG in the vapor phase separated by the degassing members equipping the dispensing device 6.

Le GPL en phase vapeur ainsi séparé est réintroduit dans la phase de GPL vapeur 3 à la partie supérieure du réservoir de stockage 1 où débouche la ligne de retour 5.The separated vapor phase LPG is reintroduced into the vapor LPG phase 3 at the top of the storage tank 1 where the return line 5 opens.

Cette réintroduction est assurée par une pompe de retour non représentée qui est en fait montée à la partie interne de l'appareil distributeur 6.This reintroduction is ensured by a not shown return pump which is in fact mounted to the inner part of the dispensing device 6.

La ligne de retour 5 est en outre équipée de clapets anti-retour 51, 57 et d'une électrovanne 58.The return line 5 is further equipped with non-return valves 51, 57 and a solenoid valve 58.

Selon la figure 1, deux pressostats 7a, 7b calibrés à une valeur de seuil sont respectivement branchés sur la ligne de transfert 4 et sur la ligne de retour 5 et sont montés en série sur un circuit électrique de contrôle 9 qui sera décrit plus en détail dans la suite de cet exposé.According to figure 1 two pressure switches 7a, 7b calibrated at a threshold value are respectively connected to the transfer line 4 and to the return line 5 and are connected in series to an electrical control circuit 9 which will be described in more detail in the following this presentation.

Comme représenté schématiquement sur la figure 1, ce circuit électrique de contrôle 9 est relié au calculateur central 8 de façon à permettre de détecter la présence de fuites de GPL dans la ligne de transfert 4 ou dans la ligne de retour 5.As shown schematically on the figure 1 this electrical control circuit 9 is connected to the central computer 8 so as to detect the presence of LPG leaks in the transfer line 4 or in the return line 5.

Il est à noter que dans une installation de distribution de GPL, la pression de service normale est comprise entre 7 et 15 bars et peut être limitée à 23 bars par des soupapes de sécurité calibrées en conséquence.It should be noted that in a LPG distribution system, the normal operating pressure is between 7 and 15 bar and can be limited to 23 bar by safety valves calibrated accordingly.

En présence de fuites sur la ligne de transfert 4 ou sur la ligne de retour 5, la pression chute fortement par rapport à cette pression de service normale.In the presence of leaks on the transfer line 4 or on the return line 5, the pressure drops significantly with respect to this normal operating pressure.

Par suite, les deux pressostats 7a, 7b peuvent à titre d'exemple être calibrés à une valeur de seuil de 4 bars, cette valeur de seuil n'étant pas nécessairement la même pour les deux pressostats.As a result, the two pressure switches 7a, 7b can, for example, be calibrated to a threshold value of 4 bars, this threshold value not being necessarily the same for the two pressure switches.

Selon la figure 2, le circuit électrique de contrôle 9 sur lequel les deux pressostats 7a, 7b sont montés en série est connecté au réseau électrique central 10 de tension 220 volts et alimenté en courant par un transformateur 13 qui permet de convertir la tension électrique d'entrée de 220 Volts en une tension électrique de sortie, en règle générale de 12 Volts ou de 24 Volts.According to figure 2 the electrical control circuit 9 on which the two pressure switches 7a, 7b are connected in series is connected to the central electrical network 10 of voltage 220 volts and supplied with current by a transformer 13 which makes it possible to convert the electrical input voltage of 220 Volts at an output voltage, typically 12 volts or 24 volts.

Les fils électriques de phase ϕ et celui du neutre N du réseau 10 sont connectés à deux bornes 11.The phase electrical wires φ and that of the neutral N of the network 10 are connected to two terminals 11.

Un fil relie directement la borne neutre au transformateur 13 tandis que la borne de phase est reliée à ce transformateur via un disjoncteur de protection 12.A wire directly connects the neutral terminal to the transformer 13 while the phase terminal is connected to this transformer via a protective circuit breaker 12.

Les contacts 71a, 71 b des pressostats 7a, 7b permettent de commander l'ouverture ou la fermeture du circuit électrique de commande 9.The contacts 71a, 71b of the pressure switches 7a, 7b make it possible to control the opening or the closing of the electric control circuit 9.

Plus précisément, le circuit électrique de contrôle 9 est fermé dans le cas d'un fonctionnement normal, c'est-à-dire lorsque la pression du GPL en phase liquide dans la ligne de transfert 4 et la pression du GPL en phase vapeur dans la ligne de retour 5 sont supérieures à la valeur de seuil, et s'ouvre automatiquement lorsque l'une de ces pressions devient inférieure à cette valeur de seuil pour empêcher le passage du courant dans ce circuit 9.More specifically, the electrical control circuit 9 is closed in the case of normal operation, that is to say when the LPG pressure in the liquid phase in the transfer line 4 and the LPG pressure in the vapor phase in the return line 5 are greater than the threshold value, and opens automatically when one of these pressures becomes lower than this threshold value to prevent the flow of current in this circuit 9.

Selon la figure 2, le circuit électrique de contrôle 9 comporte également un relais électromécanique 15 comportant une bobine 16 montée sur ce circuit 9 en série avec les pressostats 7a et 7b ainsi qu'un contact 17 dont les deux bornes sont reliées au calculateur central 8.According to figure 2 the electrical control circuit 9 also comprises an electromechanical relay 15 comprising a coil 16 mounted on this circuit 9 in series with the pressure switches 7a and 7b and a contact 17 whose two terminals are connected to the central computer 8.

Compte tenu de ce montage, lorsque le circuit électrique de contrôle 9 est fermé, le champ électromagnétique induit par le courant qui traverse la bobine 16 du relais électromécanique 15 ferme le contact 17 de ce relais.In view of this arrangement, when the electric control circuit 9 is closed, the electromagnetic field induced by the current flowing through the coil 16 of the electromechanical relay 15 closes the contact 17 of this relay.

Le calculateur central 8 reçoit alors un signal RD (« Received Data ») et transmet en réponse à ce signal un signal TD (« Transmit Data ») représentatif d'un fonctionnement normal de l'installation de distribution.The central computer 8 then receives a signal RD ("Received Data") and transmits in response to this signal a signal TD ("Transmit Data") representative of a normal operation of the distribution facility.

Selon la figure 2, un fusible 14 permet de limiter le courant passant dans le circuit électronique de contrôle 9 à une valeur maximum de façon à protéger les pressostats 7a, 7b.According to figure 2 a fuse 14 makes it possible to limit the current flowing in the electronic control circuit 9 to a maximum value so as to protect the pressure switches 7a, 7b.

Le transformateur 13, les pressostats 7a, 7b, le fusible 14 et la bobine 16 du relais électromécanique 15 sont ainsi montés en série sur le circuit électrique de contrôle 9.The transformer 13, the pressure switches 7a, 7b, the fuse 14 and the coil 16 of the electromechanical relay 15 are thus connected in series to the electrical control circuit 9.

Le mode de fonctionnement du dispositif conforme à l'invention est le suivant :The mode of operation of the device according to the invention is as follows:

Dans le cas d'un fonctionnement correct, c'est-à-dire en l'absence de fuites dans les canalisations de la ligne de transfert 4 ou dans les canalisations de la ligne de retour 5, la pression du GPL circulant dans ces lignes 4, 5 est supérieure à la valeur de seuil ; par suite, les contacts 71a et 71 b des deux pressostats 7a et 7b sont fermés et le courant passe dans le circuit électrique de contrôle 9.In the case of a correct operation, that is to say in the absence of leaks in the pipes of the transfer line 4 or in the pipes of the return line 5, the LPG pressure flowing in these lines 4, 5 is greater than the threshold value; as a result, the contacts 71a and 71b of the two pressure switches 7a and 7b are closed and the current flows into the electrical control circuit 9.

La bobine 16 du relais 15 est ainsi alimentée en courant et induit un champ électromagnétique entraînant la fermeture du contact 17 du relais électromécanique 15.The coil 16 of the relay 15 is thus supplied with current and induces an electromagnetic field causing the closing of the contact 17 of the electromechanical relay 15.

Le calculateur central 8 reçoit donc un signal et détecte ainsi un fonctionnement correct de l'installation.The central computer 8 thus receives a signal and thus detects a correct operation of the installation.

Au contraire, en présence de fuites dans les canalisations de la ligne de transfert 4 ou dans les canalisations de la ligne de retour 5, la pression du GPL circulant dans au moins l'une de ces lignes 4, 5 chute et devient inférieure à la valeur de seuil de sorte que le contact 71a, 71b du pressostat 7a, 7b associé s'ouvre.On the contrary, in the presence of leaks in the pipes of the transfer line 4 or in the lines of the return line 5, the LPG pressure flowing in at least one of these lines 4, 5 falls and becomes lower than the threshold value so that the contact 71a, 71b of the associated pressure switch 7a, 7b opens.

Le courant ne peut alors plus passer dans le circuit électronique de contrôle 9, en particulier dans la bobine 16 du relais électromécanique 15, et le contact 17 de ce relais reste donc ouvert.The current can no longer pass through the electronic control circuit 9, in particular in the coil 16 of the electromechanical relay 15, and the contact 17 of this relay therefore remains open.

Par suite, le calculateur central 8 ne reçoit pas de signal et interprète cette absence de signal comme représentative de la présence de fuites sur au moins l'une des lignes de transfert 4 ou de retour 5.As a result, the central computer 8 receives no signal and interprets this absence of signal as representative of the presence of leaks on at least one of the transfer lines 4 or 5.

Le calculateur central 8 transmet alors en retour un signal permettant de déclencher une alarme et/ou de commander l'interruption de la distribution de GPL.The central computer 8 then sends back a signal to trigger an alarm and / or to control the interruption of the distribution of LPG.

Cette livraison reste bloquée tant que ce problème n'est pas résolu et ne peut être remise en route qu'après intervention d'une personne habilitée.This delivery remains blocked until this problem is solved and can be restarted only after intervention by an authorized person.

NOMENCLATURENOMENCLATURE

11
Réservoir de stockageStorage tank
22
Phase de GPL liquideLPG liquid phase
33
Phase de GPL vapeurSteam LPG phase
44
Ligne de transfert de GPL liquideLiquid LPG transfer line
55
Ligne de retour du GPL gazeuxGaseous LPG return line
66
Appareil distributeurDistributor device
7a, 7b7a, 7b
PressostatsPressure Switches
88
Ordinateur centralCentral computer
99
Dispositif électriqueElectrical device
1010
Réseau électrique centralCentral electrical network
11 111 1
Bornesbounds
1212
Disjoncteur de protectionProtection circuit breaker
1313
TransformateurTransformer
1414
FusibleFuse
1515
Relais électromagnétiqueElectromagnetic relay
1616
BobineCoil
1717
ContactContact
41, 4741, 47
Clapets anti-retourCheck valves
4242
Pompe de transfertTransfer pump
4343
MoteurEngine
4444
Contrôleur de commandeControl controller
45, 4845, 48
ElectrovannesSolenoid
4646
FiltreFiltered
51, 5751, 57
Clapets anti-retourCheck valves
5858
ElectrovanneSolenoid
71a, 71b71a, 71b
Interrupteursswitches

Claims (3)

  1. Device for defecting leaks in an LPG dispensing installation comprising:
    - a buried tank for storing LPG (1), this tank containing a liquid LPG phase (2) surmounted by a vapour LPG phase (3),
    - a dispensing apparatus (6) equipped with a flexible tube to which a dispensing gun is connected, a volumetric meter associated with electronic counting and display devices, and also devices for degassing the liquid-phase LPG to be dispensed,
    - a line for transferring liquid-phase LPG (4) which connects the stowage tank (1) to the dispensing apparatus (6) and which is provided with a transfer pump (42) and also with at least one electrovalve (45),
    - a line for returning vapour-phase LPG (5) which connects the dispensing apparatus (6) to the storage tank (1) and which is provided with a return pump, and
    - a central computer (8) connected to an actuating controller (44) or the transfer pump (42) and of the electrovalve (45),
    characterised in that
    it comprises:
    - two pressure switches (7a, 7b) which are calibrated to a threshold value and which are, on the one hand, connected to the line for the transfer of liquid-phase LPG (4) and to the line for the return of vapour-phase LPG (5), respectively, and, on the other hand, mounted in series on an electrical control circuit (9) in order to close that circuit when the pressure or the liquid-phase LPG in the transfer line (4) and the pressure of the vapour-phase LPG in the return line (5) are greater than the threshold value, and to open that circuit (9) when one of those pressures becomes lower than the threshold value in order to prevent the passage of current therein, sand
    - means for detecting the passage of current in the electrical control circuit (9), which means arse associated with the central computer (8) in order to enable it to trigger an alarm and/or to actuate the interruption of the dispensing of LPG in the absence of current in the circuit (9).
  2. Device according to claim 1,
    characterised in that
    the electrical control circuit (9) is supplied with current from the mains network (10), preferably by means of a transformer (13).
  3. Device according to either claim 1 or claim 2,
    characterised in that
    the means for detecting the passage of current in the electrical control circuit (9) are formed by an electromechanical relay (15) comprising a coil (16) mounted on that circuit in series with the two pressure switches (7a, 7b) and also a contact (17) which closes under the action of the electromagnetic field inducted by the current passing through the coil (16) in order to transmit a signal indicating correct functioning to the central computer (8).
EP10305379A 2009-04-20 2010-04-13 Leak detection device for a LPG distribution installation Not-in-force EP2243995B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10305379T PL2243995T3 (en) 2009-04-20 2010-04-13 Leak detection device for a LPG distribution installation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0952553A FR2944517B1 (en) 2009-04-20 2009-04-20 DEVICE FOR DETECTING LEAKS IN A LPG DISTRIBUTION FACILITY

Publications (2)

Publication Number Publication Date
EP2243995A1 EP2243995A1 (en) 2010-10-27
EP2243995B1 true EP2243995B1 (en) 2011-11-02

Family

ID=41382088

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10305379A Not-in-force EP2243995B1 (en) 2009-04-20 2010-04-13 Leak detection device for a LPG distribution installation

Country Status (5)

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EP (1) EP2243995B1 (en)
AT (1) ATE531999T1 (en)
ES (1) ES2375460T3 (en)
FR (1) FR2944517B1 (en)
PL (1) PL2243995T3 (en)

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Publication number Priority date Publication date Assignee Title
JP6574321B1 (en) * 2019-02-15 2019-09-11 石油資源開発株式会社 Floating body type low temperature liquefied gas filling equipment and low temperature liquefied gas delivery method using the same
CN113108239B (en) * 2021-03-19 2021-10-08 山东京博控股集团有限公司 Closed-loop safety ventilation system of full-covering soil tank

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Publication number Priority date Publication date Assignee Title
US5353849A (en) * 1992-05-27 1994-10-11 Cryogenic Fuels Inc. Apparatus for metering and transfer of cryogenic liquids
EP1450097A3 (en) * 2003-02-19 2007-12-12 Taiyo Nippon Sanso Corporation Fuel filling device and fuel leakage detection method
US7287558B2 (en) * 2003-07-03 2007-10-30 Arizona Public Service Company Hydrogen handling or dispensing system
FR2904818B1 (en) * 2006-08-08 2013-04-05 Valeo Sys Controle Moteur Sas METHOD AND DEVICE FOR SECURELY FILLING A TANK

Also Published As

Publication number Publication date
PL2243995T3 (en) 2012-06-29
ATE531999T1 (en) 2011-11-15
FR2944517B1 (en) 2012-06-08
ES2375460T3 (en) 2012-03-01
FR2944517A1 (en) 2010-10-22
EP2243995A1 (en) 2010-10-27

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