EP0556527A1 - Distributing and measuring apparatus for liquefied petroleum gas - Google Patents

Distributing and measuring apparatus for liquefied petroleum gas Download PDF

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Publication number
EP0556527A1
EP0556527A1 EP92440027A EP92440027A EP0556527A1 EP 0556527 A1 EP0556527 A1 EP 0556527A1 EP 92440027 A EP92440027 A EP 92440027A EP 92440027 A EP92440027 A EP 92440027A EP 0556527 A1 EP0556527 A1 EP 0556527A1
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EP
European Patent Office
Prior art keywords
valve
safety
gas
return
liquefied petroleum
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.)
Withdrawn
Application number
EP92440027A
Other languages
German (de)
French (fr)
Inventor
Christophe Vallet
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.)
JACOB SA
Original Assignee
JACOB SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JACOB SA filed Critical JACOB SA
Priority to EP92440027A priority Critical patent/EP0556527A1/en
Publication of EP0556527A1 publication Critical patent/EP0556527A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/06—Details or accessories
    • B67D7/76—Arrangements of devices for purifying liquids to be transferred, e.g. of filters, of air or water separators
    • B67D7/763—Arrangements of devices for purifying liquids to be transferred, e.g. of filters, of air or water separators of air separators
    • 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
    • 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
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
    • 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
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • 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
    • 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
    • F17C2205/0323—Valves
    • F17C2205/0332—Safety valves or pressure relief valves
    • 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
    • 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
    • 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
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0636—Flow or movement of content

Definitions

  • the present invention relates to a device for distributing and measuring liquefied petroleum gas, and in particular a safety box including a degasser and a differential valve and performing the functions of gas separation, maintaining of differential pressure, filtration, safety check valve and relief valve.
  • the devices currently used for the distribution and measurement of liquefied petroleum gas present risks of leakage and operational failures, due in particular to their complexity and their lack of mechanical rigidity.
  • the object of the invention is to remedy these drawbacks by assembling various means in a rigid safety box and by using a turbine meter with a helical rotor, said assembly having the advantage of compactness and of 'greater ease of implementation, combined with a reduced manufacturing cost and increased operational safety.
  • the housing safety capable of being sealed by the weights and measures department, is a compact box made of a steel of high mechanical resistance and is provided with tubular holes and cavities allowing to insert therein in particular a differential valve and a degasser, suitably connected to the inlet and outlet of the liquefied gas.
  • the device according to the invention comprises a filtration assembly 1, a pump unit 2, a regulation assembly 3, two safety solenoid valves 41 and 42, two check valves feet 51 and 52, a turbine meter 6, a control solenoid valve 7, a rupture valve 8, a flexible hose 9, a distribution gun 16, a safety casing 10, a dead-man contact 11, a gun contact 12, two emergency stop switches 13, a digital recorder 14 and a pressure gauge 15, connected between by pipes and connections which are not referenced, for the purpose of clarity of the description.
  • the liquefied petroleum gas follows the path starting from the filtration assembly 1 and passing successively through the pump unit 2, the regulation assembly 3, a safety solenoid valve 41, a foot valve 51, the housing 10, the measurer turbine 6, the housing 10, the control solenoid valve 7, the rupture valve 8, the hose 9 and ending in the distribution gun 16, the filtration assembly 1 being connected to the liquid part of a reservoir d 'not shown.
  • the second safety solenoid valve 42 not connected to the regulating assembly 3, is connected to the gaseous part of the same implantation tank, not shown.
  • the safety solenoid valves 41 and 42, the foot valves 51 and 52, the rupture valves 8, the emergency stop switches 13 and the pressure gauge 15 constitute the safety members of the device according to the invention.
  • the operating members consist of the control solenoid valve 7, the dead-man contact 11 and the gun contact 12. These members control the operation of the device, in normal operation, apart from breakdowns and anomalies whose detection is ensured by security organs.
  • the digital recorder 14 has the shape of a gallows and operates electronically, indicating on two displays the volume and the price of the liquefied petroleum gas distributed. For this purpose, it is connected to the turbine meter 6, which measures the flow rate of liquefied petroleum gas passing through it.
  • the safety box 10 comprises a pressure tap 21, a differential valve constituted by a bellows spring 22 and a movable piston 23 with axial displacement, a start from liquid 24, a safety valve 25, a gas return 26, a liquid inlet 27, a meter return 28, a meter departure 29, a degassing axis 30, a float assembly 31, a secondary meter return 32 , a non-return valve 33, a screen filter 34, a gas connection 35, and a secondary flow meter 36.
  • the pressure tap 21 allows the connection of the pressure gauge 15 to the housing 10 via a pipe 15 '.
  • the liquid outlet 24 is connected to the control solenoid valve 7.
  • the gas return 26 is connected to the foot valve 52 which, via a safety solenoid valve 42, is connected to the gas part of the reservoir d 'location, not shown.
  • the liquid inlet 27 is connected, through a foot valve 51 and a safety solenoid valve 41, to the regulating assembly 3.
  • the return of the meter 28 is connected to the outlet of the turbine meter 6, while its flow is connected to the input of the turbine measurer 6.
  • the secondary return of measurer 32 and the secondary departure of measurer 36 allow the lateral connection of the turbine measurer 6.
  • the differential valve consisting of the bellows spring 22 and the movable piston 23, is adapted to allow the fluid to pass only when the pressure difference between the flow of liquid 24 and the flow of liquid 27 is greater than that imposed by the bellows spring 22, preferably a bar.
  • This valve also has the function of preventing the return of the fluid in the event of high pressure downstream of the housing 10.
  • the safety valve 25 is calibrated and adapted to eliminate any overpressure in the system, which may be caused by the obstruction of the liquid return from the pump set 2, an incorrect adjustment of this return or an incident on this return. In the embodiment shown it allows the return of liquid to the reservoir implantation, through the gas return 26, but it can also, in a different embodiment, allow the evacuation of the product under pressure in the atmosphere.
  • the assembly consisting of the float 31 and the degassing axis 30 is adapted to prevent the turbine measurer from measuring the product in gaseous form.
  • the function of the non-return valve 33 is to keep the whole of the housing 10 under pressure when the system is put to rest and to avoid liquid returns in the event of an incident on the differential valve.
  • the screen filter 34 preferably has a spacing of 170 ⁇ m. It captures any solid particles contained in the liquefied petroleum gas passing through it.
  • the gas connection 35 allows the return of the gaseous fluid to the implantation tank.
  • the housing 10 also includes the gas evacuation device, the connection orifice connected to the gas phase of the fluid and the connection flanges for the inputs and outputs of the fluid and of the turbine meter 6.
  • It also includes a gas separator part consisting of the float 31 and the degassing axis 30.
  • a gas separator part consisting of the float 31 and the degassing axis 30.
  • the differential valve part comprises the movable piston 23 along its axis.
  • This movable piston 23 is subjected on its front face, that is to say on its underside in FIGS. 2, 3 and 4, to the pressure of the liquid leaving the turbine meter 6. It is subjected on its face rear, carrying the bellows spring 22, at spring tension, calibrated at operating pressure plus one bar. Consequently, the flow of the liquid to the liquid outlet 24 is only authorized when the pressure of the liquefied petroleum gas is approximately one bar higher than the vapor pressure of the liquefied petroleum gas contained in the implantation tank. .
  • FIGS 3 and 4 provide a better understanding of the operation in liquid service and in gaseous service of the housing 10.
  • the liquefied petroleum gas is represented by close points and the gaseous by separated points.
  • the liquefied petroleum gas arrives in the housing 10 through the liquid inlet 27 and successively raises the non-return valve 33 and the float 31.
  • the float 31 closes the gas return orifice of the degassing axis 30.
  • the liquefied petroleum gas can therefore pass through the orifice of the start of measurer 29. It returns from the turbine measurer 6 by the return of measurer 28.
  • the pressure of liquefied petroleum gas being greater than that of the gaseous plus a bar, the piston 23 is raised and allows the passage of the liquefied petroleum gas towards the liquid departure 24.
  • the liquefied petroleum gas arrives in the housing 10 through the liquid inlet 27 and raises the non-return valve 33.
  • the float 31 is not fully raised because there is formation of gaseous at a pressure higher than that of the gas of liquefied petroleum.
  • the orifice of the degassing axis 30 is not closed.
  • the degassing axis 30 therefore puts the piston 23 under gas pressure.
  • the upstream pressure and the downstream pressure of this piston 23 being equal, the differential valve cannot open and the flow rate of liquefied petroleum gas cannot be measured.
  • the operation of the device is as follows: when the distribution gun 16 is lifted, the price and volume indicators of the digital recorder 14 are automatically reset to zero, and, simultaneously, the pump set 2 is put into operation. Distribution is controlled by manual action on the dead man contact 11 controlling the opening of the control solenoid valve 7.
  • the liquefied petroleum gases are sent to the inlet of the gas separator of the housing 10, after having passed through the non-return valve 51 making it possible to keep the pressure in the housing 10 in the absence of operation of the pump set 2, and after having passed through the filter 34 of the housing 10, intended to eliminate any solid particles.
  • the gas separator is provided with a float 31 which ensures the automatic return of the gas to the gas phase of the implantation tank when there is formation of gas.
  • the liquefied petroleum gases exit the separator through the upper part of the housing 10, to pass through the turbine meter 6 which emits pulses as a function of the flow rate which it measures.
  • the liquefied petroleum gases then enter the differential pressure maintenance valve whose role is to maintain the liquefied petroleum gas in the turbine meter 6 at a pressure at least one bar higher than that of the saturated vapor.
  • the control solenoid valve 7 and a safety valve 8 At the outlet of the differential pressure valve is connected the control solenoid valve 7 and a safety valve 8, then, at the end of the hose 9, the distribution gun 16.
  • the hanging up of the dispensing gun 16 causes the opening of a switch constituted by the gun contact 12.
  • the opening of this switch cuts off the self-supply circuit of the reset relay of the digital recorder 14 and the power circuit of the pump set 2.
  • the main application of the device according to the invention is the measurement of the distribution of liquefied petroleum gas intended for automotive fueling and the pricing of this distribution.

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

Abstract

Distributing and measuring apparatus for liquefied petroleum gas, including a filtration assembly (1), a motorised pump set (2), a regulating assembly (3), two safety solenoid valves (41, 42), two foot (foot-actuated) valves (51, 52), a measurer with turbine (6), a control solenoid valve (7), a break valve (8), a flexible pipe (9), a distribution gun (16), a dead-man contact (11), a pistol contact (12), a digital recorder (14) and a pressure gauge (manometer) (15). A safety housing (10) encloses a degasser and a differential valve and performs the functions of gas separation, maintenance of differential pressure, filtration, non-return safety and discharge valve. <IMAGE>

Description

La présente invention concerne un dispositif de distribution et de mesurage de gaz de pétrole liquéfié, et notamment un boîtier de sécurité incluant un dégazeur et une soupape différentielle et accomplissant les fonctions de séparation de gaz, de maintien de pression différentielle, de filtration, de sécurité anti-retour et de soupape de décharge.The present invention relates to a device for distributing and measuring liquefied petroleum gas, and in particular a safety box including a degasser and a differential valve and performing the functions of gas separation, maintaining of differential pressure, filtration, safety check valve and relief valve.

Les dispositifs actuellement mis en oeuvre pour la distribution et le mesurage de gaz de pétrole liquéfié présentent des risques de fuite et de pannes de fonctionnement, dus notamment à leur complexité et à leur manque de rigidité mécanique.The devices currently used for the distribution and measurement of liquefied petroleum gas present risks of leakage and operational failures, due in particular to their complexity and their lack of mechanical rigidity.

L'invention a pour but de remédier à ces inconvénients par l'assemblage de divers moyens dans un boîtier de sécurité rigide et par l'utilisation d'un mesureur à turbine à rotor hélicoïdal, ledit assemblage présentant l'avantage de la compacité et d'une plus grande facilité de mise en oeuvre , alliée à un coût de fabrication réduit et à une sécurité de fonctionnement accrue.The object of the invention is to remedy these drawbacks by assembling various means in a rigid safety box and by using a turbine meter with a helical rotor, said assembly having the advantage of compactness and of 'greater ease of implementation, combined with a reduced manufacturing cost and increased operational safety.

Conformément à l'invention, le boîtier de sécurité, susceptible d'être scellé par les services des poids et mesures, est un boîtier compact réalisé en un acier de résistance mécanique élevée et est muni de perçages tubulaires et de cavités permettant d'y insérer notamment une soupape différentielle et un dégazeur, convenablement reliés à l'arrivée et à la sortie du gaz liquéfié.According to the invention, the housing safety, capable of being sealed by the weights and measures department, is a compact box made of a steel of high mechanical resistance and is provided with tubular holes and cavities allowing to insert therein in particular a differential valve and a degasser, suitably connected to the inlet and outlet of the liquefied gas.

La description qui va suivre, faite en regard du dessin annexé dans un but explicatif et nullement limitatif, permettra de mieux comprendre les avantages, buts et caractéristiques de la présente invention.The description which follows, made with reference to the appended drawing for explanatory purposes and in no way limiting, will allow a better understanding of the advantages, aims and characteristics of the present invention.

Dans le dessin annexé :

  • la figure 1 représente un schéma de principe d'un dispositif selon l'invention.
  • la figure 2 représente le boîtier de sécurité de ce dispositif en vues en coupe.
  • la figure 3 représente le boîtier de sécurité de la figure 2 dans une première phase de fonctionnement du dispositif.
  • la figure 4 représente le boîtier de sécurité de la figure 2 dans une seconde phase de fonctionnement du dispositif.
In the attached drawing:
  • Figure 1 shows a block diagram of a device according to the invention.
  • Figure 2 shows the safety box of this device in sectional views.
  • Figure 3 shows the safety box of Figure 2 in a first phase of operation of the device.
  • Figure 4 shows the safety box of Figure 2 in a second phase of operation of the device.

Si on se réfère d'abord à la figure 1, on voit que le dispositif selon l'invention comprend un ensemble de filtration 1, un groupe motopompe 2, un ensemble de régulation 3, deux électrovannes de sécurité 41 et 42, deux clapets de pieds 51 et 52, un mesureur à turbine 6, une électrovanne de commande 7, un clapet de rupture 8, un tuyau flexible 9, un pistolet de distribution 16, un boîtier de sécurité 10, un contact homme-mort 11, un contact pistolet 12, deux interrupteurs d'arrêt d'urgence 13, un enregistreur numérique 14 et un manomètre 15, reliés entre par des tubulures et des raccordements qui ne sont pas référencés, dans un but de clarté de la description.If we refer first to Figure 1, we see that the device according to the invention comprises a filtration assembly 1, a pump unit 2, a regulation assembly 3, two safety solenoid valves 41 and 42, two check valves feet 51 and 52, a turbine meter 6, a control solenoid valve 7, a rupture valve 8, a flexible hose 9, a distribution gun 16, a safety casing 10, a dead-man contact 11, a gun contact 12, two emergency stop switches 13, a digital recorder 14 and a pressure gauge 15, connected between by pipes and connections which are not referenced, for the purpose of clarity of the description.

Le gaz de pétrole liquéfié suit le chemin partant de l'ensemble de filtration 1 et passant successivement par le groupe motopompe 2, l'ensemble de régulation 3, une électrovanne de sécurité 41, un clapet de pied 51, le boîtier 10, le mesureur à turbine 6, la boîtier 10, l'électrovanne de commande 7, le clapet de rupture 8, le flexible 9 et finissant dans le pistolet de distribution 16, l'ensemble de filtration 1 étant relié à la partie liquide d'un réservoir d'implantation non représenté. La seconde électrovanne de sécurité 42, non reliée à l'ensemble de régulation 3, est reliée à la partie gazeux du même réservoir d'implantation, non représenté.The liquefied petroleum gas follows the path starting from the filtration assembly 1 and passing successively through the pump unit 2, the regulation assembly 3, a safety solenoid valve 41, a foot valve 51, the housing 10, the measurer turbine 6, the housing 10, the control solenoid valve 7, the rupture valve 8, the hose 9 and ending in the distribution gun 16, the filtration assembly 1 being connected to the liquid part of a reservoir d 'not shown. The second safety solenoid valve 42, not connected to the regulating assembly 3, is connected to the gaseous part of the same implantation tank, not shown.

Les électrovannes de sécurité 41 et 42, les clapets de pieds 51 et 52, les clapets de rupture 8, les interrupteurs d'arrêt d'urgence 13 et le manomètre 15 constituent les organes de sécurité du dispositif selon l'invention.The safety solenoid valves 41 and 42, the foot valves 51 and 52, the rupture valves 8, the emergency stop switches 13 and the pressure gauge 15 constitute the safety members of the device according to the invention.

Les organes de fonctionnement sont constitués de l'électrovanne de commande 7, du contact homme-mort 11 et du contact pistolet 12. Ces organes conmandent le fonctionnement du dispositif, en fonctionnement normal, en dehors des pannes et anomalies dont la détection est assurée par les organes de sécurité.The operating members consist of the control solenoid valve 7, the dead-man contact 11 and the gun contact 12. These members control the operation of the device, in normal operation, apart from breakdowns and anomalies whose detection is ensured by security organs.

L'enregistreur numérique 14 présente la forme d'une potence et fonctionne de manière électronique, indiquant sur deux afficheurs le volume et le prix du gaz de pétrole liquéfié distribué. Dans ce but, il est relié au mesureur à turbine 6, lequel effectue une mesure du débit de gaz de pétrole liquéfié le traversant.The digital recorder 14 has the shape of a gallows and operates electronically, indicating on two displays the volume and the price of the liquefied petroleum gas distributed. For this purpose, it is connected to the turbine meter 6, which measures the flow rate of liquefied petroleum gas passing through it.

Si on se réfère à la figure 2 on voit que le boîtier de sécurité 10 comprend une prise manométrique 21, une soupape différentielle constituée d'un ressort-soufflet 22 et d'un piston mobile 23 à déplacement axial, un départ de liquide 24, une soupape de sécurité 25, un retour de gazeux 26, une arrivée de liquide 27, un retour de mesureur 28, un départ de mesureur 29, un axe de dégazage 30, un ensemble flotteur 31, un retour secondaire de mesureur 32, un clapet anti-retour 33, un filtre à tamis 34, une liaison gazeux 35, et un départ secondaire de mesureur 36.Referring to FIG. 2, it can be seen that the safety box 10 comprises a pressure tap 21, a differential valve constituted by a bellows spring 22 and a movable piston 23 with axial displacement, a start from liquid 24, a safety valve 25, a gas return 26, a liquid inlet 27, a meter return 28, a meter departure 29, a degassing axis 30, a float assembly 31, a secondary meter return 32 , a non-return valve 33, a screen filter 34, a gas connection 35, and a secondary flow meter 36.

La prise manométrique 21 permet lu connexion du manomètre 15 au boîtier 10 par l'intermédiaire d'un tuyau 15'. Le départ de liquide 24 est connecté à l'électrovanne de commande 7. Le retour de gazeux 26 est relié au clapet de pied 52 qui, par l'intermédiaire d'une électrovanne de sécurité 42, est relié à la partie gazeux du réservoir d'implantation, non représenté. L'arrivée de liquide 27 est reliée, à travers un clapet de pied 51 et une électrovanne de sécurité 41, à l'ensemble de régulation 3. Le retour de mesureur 28 est relié à la sortie du mesureur à turbine 6, tandis que son départ est relié à l'entrée du mesureur à turbine 6. Le retour secondaire de mesureur 32 et le départ secondaire de mesureur 36 permettent la connexion latérale du mesureur à turbine 6.The pressure tap 21 allows the connection of the pressure gauge 15 to the housing 10 via a pipe 15 '. The liquid outlet 24 is connected to the control solenoid valve 7. The gas return 26 is connected to the foot valve 52 which, via a safety solenoid valve 42, is connected to the gas part of the reservoir d 'location, not shown. The liquid inlet 27 is connected, through a foot valve 51 and a safety solenoid valve 41, to the regulating assembly 3. The return of the meter 28 is connected to the outlet of the turbine meter 6, while its flow is connected to the input of the turbine measurer 6. The secondary return of measurer 32 and the secondary departure of measurer 36 allow the lateral connection of the turbine measurer 6.

La soupape différentielle, constituée du ressort à soufflet 22 et du piston mobile 23, est adaptée à ne laisser passer le fluide que lorsque la différence de pression entre le départ de liquide 24 et l'arrivée de liquide 27 est supérieure à celle imposée par le ressort à soufflet 22, soit préférentiellement un bar. Cette soupape a aussi pour fonction d'éviter le retour du fluide en cas de pression importante en aval du boîtier 10.The differential valve, consisting of the bellows spring 22 and the movable piston 23, is adapted to allow the fluid to pass only when the pressure difference between the flow of liquid 24 and the flow of liquid 27 is greater than that imposed by the bellows spring 22, preferably a bar. This valve also has the function of preventing the return of the fluid in the event of high pressure downstream of the housing 10.

La soupape de sécurité 25 est tarée et adaptée à éliminer une éventuelle surpression du système, susceptible d'être provoquée par l'obturation du retour de liquide du groupe motopompe 2, un mauvais réglage de ce retour ou un incident sur ce retour. Dans le mode de réalisation représenté elle permet le retour de liquide vers le réservoir d'implantation, à travers le retour de gazeux 26, mais elle peut également, dans un mode de réalisation différent, permettre l'évacuation du produit en surpression dans l'atmosphère.The safety valve 25 is calibrated and adapted to eliminate any overpressure in the system, which may be caused by the obstruction of the liquid return from the pump set 2, an incorrect adjustment of this return or an incident on this return. In the embodiment shown it allows the return of liquid to the reservoir implantation, through the gas return 26, but it can also, in a different embodiment, allow the evacuation of the product under pressure in the atmosphere.

L'ensemble constitué du flotteur 31 et de l'axe de dégazage 30 est adapté à éviter au mesureur à turbine de mesurer le produit sous forme gazeuse.The assembly consisting of the float 31 and the degassing axis 30 is adapted to prevent the turbine measurer from measuring the product in gaseous form.

Le clapet anti-retour 33 a pour fonction de garder l'ensemble du boîtier 10 sous pression lors d'une mise au repos du système et d'éviter des retours de liquide en cas d'incident sur la soupape différentielle.The function of the non-return valve 33 is to keep the whole of the housing 10 under pressure when the system is put to rest and to avoid liquid returns in the event of an incident on the differential valve.

Le filtre à tamis 34 présente préférentiellement un espacement de 170µm. Il capte les éventuelles particules solides contenues dans le gaz de pétrole liquéfié qui le traverse.The screen filter 34 preferably has a spacing of 170 μm. It captures any solid particles contained in the liquefied petroleum gas passing through it.

La liaison gazeux 35 permet le retour du fluide gazeux au réservoir d'implantation.The gas connection 35 allows the return of the gaseous fluid to the implantation tank.

Le boîtier 10 comporte en outre le dispositif d'évacuation des gaz, l'orifice de liaison raccordé à la phase gazeuse du fluide et les brides de raccordement des entrées et sorties du fluide et du mesureur à turbine 6.The housing 10 also includes the gas evacuation device, the connection orifice connected to the gas phase of the fluid and the connection flanges for the inputs and outputs of the fluid and of the turbine meter 6.

Il comporte également une partie séparateur de gaz constitué du flotteur 31 et de l'axe de dégazage 30. Par l'intermédiaire du flottaur 31, la séparation de gaz et de liquide est réalisée par mise en communication entre le réseau liquide et le réseau gazeux lorsqu'il y a formation de gazeux. L'axo de dégazage 30 permet la retour du gazeux dans le réservoir d'implantation.It also includes a gas separator part consisting of the float 31 and the degassing axis 30. By means of the floaur 31, the separation of gas and liquid is carried out by communication between the liquid network and the gas network. when gas is formed. The degassing axis 30 allows the return of the gas in the implantation tank.

La partie soupape différentielle comporte le piston mobile 23 suivant son axe. Ce piston mobile 23 est soumis sur sa face antérieure, c'est-à-dire sur sa face inférieure sur les figures 2, 3 et 4, à la pression du liquide en sortie du mesureur à turbine 6. Il est soumis sur sa face arrière, portant le ressort soufflet 22, à la tension du ressort, taré à la pression de service plus un bar. En conséquence, l'écoulement du liquide vers le départ de liquide 24 n'est autorisé que lorsque la pression du gaz de pétrole liquéfié est supérieure de un bar environ à la tension de vapeur du gaz de pétrole liquéfié contenu dans le réservoir d'implantation.The differential valve part comprises the movable piston 23 along its axis. This movable piston 23 is subjected on its front face, that is to say on its underside in FIGS. 2, 3 and 4, to the pressure of the liquid leaving the turbine meter 6. It is subjected on its face rear, carrying the bellows spring 22, at spring tension, calibrated at operating pressure plus one bar. Consequently, the flow of the liquid to the liquid outlet 24 is only authorized when the pressure of the liquefied petroleum gas is approximately one bar higher than the vapor pressure of the liquefied petroleum gas contained in the implantation tank. .

Les figures 3 et 4 permettent de mieux comprendre le fonctionnement en service liquide et en service gazeux du boîtier 10. Dans ces figures, le gaz de pétrole liquéfié est représenté par des points rapprochés et le gazeux par des points écartés.Figures 3 and 4 provide a better understanding of the operation in liquid service and in gaseous service of the housing 10. In these figures, the liquefied petroleum gas is represented by close points and the gaseous by separated points.

On retrouve dans la figure 3 les éléments de la figure 2. Dans cette figure est représenté le fonctionnement du bloc rigide 10 en service liquide, c'est-à-dire quand la pression du gaz de pétrole liquéfié est supérieure de un bar environ à la tension de vapeur du gaz de pétrole liquéfié contenu dans le réservoir d'implantation.We find in Figure 3 the elements of Figure 2. In this figure is shown the operation of the rigid block 10 in liquid service, that is to say when the pressure of the liquefied petroleum gas is approximately one bar higher than the vapor pressure of the liquefied petroleum gas contained in the implantation tank.

Le gaz de pétrole liquéfié arrive dans le boîtier 10 par l'arrivée de liquide 27 et soulève successivement le clapet anti-retour 33 et le flotteur 31. Le flotteur 31 obture l'orifice de retour gazeux de l'axe de dégazage 30. Le gaz de pétrole liquéfié peut donc passer par l'orifice du départ de mesureur 29. Il revient du mesureur à turbine 6 par le retour de mesureur 28. La pression de gaz de pétrole liquéfié étant supérieure à celle du gazeux plus un bar, le piston 23 se soulève et permet le passage du gaz de pétrole liquéfié vers le départ de liquide 24.The liquefied petroleum gas arrives in the housing 10 through the liquid inlet 27 and successively raises the non-return valve 33 and the float 31. The float 31 closes the gas return orifice of the degassing axis 30. The liquefied petroleum gas can therefore pass through the orifice of the start of measurer 29. It returns from the turbine measurer 6 by the return of measurer 28. The pressure of liquefied petroleum gas being greater than that of the gaseous plus a bar, the piston 23 is raised and allows the passage of the liquefied petroleum gas towards the liquid departure 24.

Si on se réfère à la figure 4, on voit sur cette figure le fonctionnement du boîtier 10 en service gazeux, c'est-à-dire quand la pression du gaz de pétrole liquéfié est inférieure à la tension de vapeur du gaz de pétrole liquéfié contenu dans le réservoir d'implantation, plus un bar.Referring to Figure 4, we see in this figure the operation of the housing 10 in gaseous service, that is to say when the pressure of the liquefied petroleum gas is lower than the vapor pressure of the liquefied petroleum gas contained in the implantation tank, plus a bar.

Le gaz de pétrole liquéfié arrive dans le boîtier 10 par l'arrivée de liquide 27 et soulève le clapet anti-retour 33. Le flotteur 31 n'est pas entièrement soulevé car il y a formation de gazeux à une pression supérieure à celle du gaz de pétrole liquéfié. L'orifice de l'axe de dégazage 30 n'est pas obturé. L'axe de dégazage 30 met donc sous pression gazeux le piston 23. La pression amont et la pression aval de ce piston 23 étant égales, la soupape différentielle ne peut s'ouvrir et le débit du gaz de pétrole liquéfié ne peut être mesuré. Lorsque tout le gazeux est retourné au réservoir d'implantation par l'intermédiaire de la sortie de gazeux 26, le niveau de liquide soulève entièrement le flotteur 31 et provoque le passage en fonctionnement liquide décrit en regard de la figure 3.The liquefied petroleum gas arrives in the housing 10 through the liquid inlet 27 and raises the non-return valve 33. The float 31 is not fully raised because there is formation of gaseous at a pressure higher than that of the gas of liquefied petroleum. The orifice of the degassing axis 30 is not closed. The degassing axis 30 therefore puts the piston 23 under gas pressure. The upstream pressure and the downstream pressure of this piston 23 being equal, the differential valve cannot open and the flow rate of liquefied petroleum gas cannot be measured. When all the gaseous is returned to the implantation tank via the gaseous outlet 26, the liquid level fully lifts the float 31 and causes the passage into liquid operation described with regard to FIG. 3.

Le boîtier 10 accomplit ainsi les fonctions de :

  • séparateur de gaz,
  • vanne de maintien de pression différentielle,
  • filtration de produit
  • sécurité anti-retour sur arrivée liquide,
  • liaison gazeux entre le séparateur de gaz et la vanne de maintien de pression différentielle,
  • soupape de décharge en cas de surpression sur le retour gazeux,
  • prise manométrique,
  • fixation directe de la boucle de mesurage sur la partie supérieure ou sur la partie latérale.
The housing 10 thus performs the functions of:
  • gas separator,
  • differential pressure maintenance valve,
  • product filtration
  • non-return security on liquid arrival,
  • gas connection between the gas separator and the differential pressure maintenance valve,
  • relief valve in the event of overpressure on the gas return,
  • pressure gauge,
  • direct fixing of the measuring loop on the upper part or on the side part.

Le fonctionnement du dispositif est le suivant : au décrochage du pistolet de distribution 16, il y a automatiquement remise à zéro des indicateurs de prix et volume de l'enregistreur numérique 14, et, simultanément, mise en fonctionnement du groupe motopompe 2. La distribution est commandée par action manuelle sur le contact homme-mort 11 commandant l'ouverture de l'électrovanne de commande 7. Les gaz de pétrole liquéfiés sont acheminés vers l'entrée du séparateur de gaz du boîtier 10, après avoir traversé le clapet anti-retour 51 permettant de garder la pression dans le boîtier 10 en l'absence de fonctionnement du groupe motopompe 2, et après avoir traversé le filtre 34 du boîtier 10, destiné à éliminer les éventuelles particules solides. Le séparateur de gaz est muni d'un flotteur 31 qui assure le retour automatique du gaz vers la phase gazeuse du réservoir d'implantation lorsqu'il y a formation de gazeux.The operation of the device is as follows: when the distribution gun 16 is lifted, the price and volume indicators of the digital recorder 14 are automatically reset to zero, and, simultaneously, the pump set 2 is put into operation. Distribution is controlled by manual action on the dead man contact 11 controlling the opening of the control solenoid valve 7. The liquefied petroleum gases are sent to the inlet of the gas separator of the housing 10, after having passed through the non-return valve 51 making it possible to keep the pressure in the housing 10 in the absence of operation of the pump set 2, and after having passed through the filter 34 of the housing 10, intended to eliminate any solid particles. The gas separator is provided with a float 31 which ensures the automatic return of the gas to the gas phase of the implantation tank when there is formation of gas.

Les gaz de pétrole liquéfiés sortent du séparateur par la partie haute du boîtier 10, pour traverser le mesureur à turbine 6 qui émet des impulsions en fonction du débit qu'il mesure. Les gaz de pétrole liquéfiés pénètrent ensuite dans la vanne de maintien de pression différentielle dont le rôle est de maintenir le gaz de pétrole liquéfié dans le mesureur à turbine 6 à une pression d'au moins un bar supérieure à celle de la vapeur saturante. En sortie de la vanne de pression différentielle est branchée l'électrovanne de commande 7 et un clapet de sécurité 8, puis, en fin du flexible 9, le pistolet de distribution 16.The liquefied petroleum gases exit the separator through the upper part of the housing 10, to pass through the turbine meter 6 which emits pulses as a function of the flow rate which it measures. The liquefied petroleum gases then enter the differential pressure maintenance valve whose role is to maintain the liquefied petroleum gas in the turbine meter 6 at a pressure at least one bar higher than that of the saturated vapor. At the outlet of the differential pressure valve is connected the control solenoid valve 7 and a safety valve 8, then, at the end of the hose 9, the distribution gun 16.

Lorsque la distribution est terminée, le raccrochage du pistolet de distribution 16 provoque l'ouverture d'un interrupteur constitué par le contact pistolet 12. L'ouverture de cet interrupteur coupe le circuit d'auto-alimentation du relais de remise à zéro de l'enregistreur numérique 14 et le circuit d'alimentation du groupe motopompe 2.When the dispensing is finished, the hanging up of the dispensing gun 16 causes the opening of a switch constituted by the gun contact 12. The opening of this switch cuts off the self-supply circuit of the reset relay of the digital recorder 14 and the power circuit of the pump set 2.

La principale application du dispositif selon l'invention est le mesurage de la distribution de gaz de pétrole liquéfié destiné à la carburation automobile et la tarification de cette distribution.The main application of the device according to the invention is the measurement of the distribution of liquefied petroleum gas intended for automotive fueling and the pricing of this distribution.

Claims (3)

Dispositif de distribution et de mesurage de gaz de pétrole liquéfié, comportant un ensemble de filtration (1), un groupe motopompe (2), un ensemble de régulation (3), deux électrovannes de sécurité (41, 42), deux clapets de pieds (51, 52), un mesureur à turbine (6), une électrovanne de commande (7), un clapet de rupture (8), un tuyau flexible (9), un pistolet de distribution (16), un contact homme-mort (11), un contact pistolet (12), un enregistreur numérique (14) et un manomètre (15), caractérisé en ce qu'il comprend un boîtier de sécurité (10) renfermant un dégazeur (30) et une soupape différentielle (22, 23) et accomplissant les fonctions de séparation des gaz, de maintien de pression différentielle, de filtration, de sécurité anti-retour et de soupape de décharge.Distribution and metering device for liquefied petroleum gas, comprising a filtration assembly (1), a pump unit (2), a regulation assembly (3), two safety solenoid valves (41, 42), two foot valves (51, 52), a turbine meter (6), a control solenoid valve (7), a rupture valve (8), a flexible hose (9), a distribution gun (16), a dead man contact (11), a gun contact (12), a digital recorder (14) and a pressure gauge (15), characterized in that it comprises a safety box (10) containing a degasser (30) and a differential valve (22 , 23) and fulfilling the functions of gas separation, differential pressure maintenance, filtration, non-return safety and relief valve. Dispositif selon la revendication 1, caractérisé en ce que la soupape différentielle du boîtier (10) est constituée d'un ressort-soufflet (22) et d'un piston mobile (23) à déplacement axial.Device according to claim 1, characterized in that the differential valve of the housing (10) consists of a bellows spring (22) and a movable piston (23) with axial displacement. Dispositif selon la revendication 1 ou la revendication 2, caractérisé en ce que le boîtier de sécurité (10) comprend une prise manométrique (21) pour la connexion du manomètre (15), une soupape différentielle constituée d'un ressort-soufflet (22) et d'un piston mobile (23) à déplacement axial, un départ de liquide (24) relié à une électro-vanne de commande (7), une soupape de sécurité (25) ; un retour de gazeux (26) relié à un clapet de pied (52) qui, par l'intermédiaire d'une électrovanne de sécurité (42), est relié à la partie gazeux du réservoir d'implantation ; une arrivée de liquide (27) reliée, à travers un clapet de pied (51) et une électrovanne de sécurité (41), à un ensemble de régulation (3) ; un retour de mesureur (28) relié à la sortie du mesureur à turbine (6) ; un départ de mesureur (29), un axe de dégazage (30), un ensemble flotteur (31), un retour secondaire de mesureur (32), un clapet anti-retour (33), un filtre à tamis (34), une liaison gazeux (35) et un départ secondaire de mesureur (36).Device according to claim 1 or claim 2, characterized in that the safety box (10) comprises a pressure tap (21) for the connection of the pressure gauge (15), a differential valve made up of a bellows spring (22) and a movable piston (23) with axial displacement, a liquid flow (24) connected to a solenoid control valve (7), a safety valve (25); a gas return (26) connected to a foot valve (52) which, via a safety solenoid valve (42), is connected to the gas part of the implantation tank; a liquid inlet (27) connected, through a foot valve (51) and a safety solenoid valve (41), to a regulating assembly (3); a meter return (28) connected to the output of the turbine meter (6); a flow meter departure (29), a degassing axis (30), a float assembly (31), a secondary return of measurer (32), a non-return valve (33), a screen filter (34), a gas connection (35) and a secondary flow of measurer (36).
EP92440027A 1992-02-21 1992-02-21 Distributing and measuring apparatus for liquefied petroleum gas Withdrawn EP0556527A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP92440027A EP0556527A1 (en) 1992-02-21 1992-02-21 Distributing and measuring apparatus for liquefied petroleum gas

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Application Number Priority Date Filing Date Title
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EP0686833A1 (en) * 1994-06-10 1995-12-13 The Lubrizol Corporation Apparatus for metering fluids
WO1998050303A1 (en) * 1997-05-05 1998-11-12 Delaware Capital Formation, Inc. Air separating fuel dispensing system
WO2000061989A1 (en) * 1999-04-13 2000-10-19 Linde Aktiengesellschaft Method for transferring low-boiling liquids
US6179163B1 (en) * 1999-06-11 2001-01-30 Delaware Capital Formation, Inc. System and method for evaluating the presence of air in a liquid-state fuel stream
CN1069740C (en) * 1995-06-30 2001-08-15 龙野机电技术股份公司 Gas and liquid separator for pump set
EP1490599A2 (en) * 2002-03-15 2004-12-29 Water Management Systems Pump system with vacuum source
US7311335B2 (en) 1999-03-22 2007-12-25 Water Management Systems Trailer and fuel tank assembly
US7878768B2 (en) 2007-01-19 2011-02-01 David Muhs Vacuum pump with wear adjustment
US8998586B2 (en) 2009-08-24 2015-04-07 David Muhs Self priming pump assembly with a direct drive vacuum pump
CN104948906A (en) * 2015-06-23 2015-09-30 大丰市大昌燃气设备有限公司 CNG dispenser and operation method thereof
DE102009047117B4 (en) * 2009-11-25 2016-06-16 Tge Marine Gas Engineering Gmbh Method and system for unloading a cargo tank for cryogenic liquefied gas
EP4035964A1 (en) * 2021-01-29 2022-08-03 ALSTOM Holdings System for dispensing a fluid

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DE3235056A1 (en) * 1982-09-22 1984-03-22 Sauerstoffwerk Westfalen AG, 4400 Münster Liquefied-gas filling station
FR2539211A1 (en) * 1983-01-12 1984-07-13 Air Liquide DEVICE FOR DISPENSING CRYOGENIC LIQUID

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US2922288A (en) * 1954-09-23 1960-01-26 Bowser Inc Liquid petroleum gas dispensing apparatus
DE3022672A1 (en) * 1980-06-18 1981-12-24 Schwelmer Eisenwerk Müller & Co GmbH, 5830 Schwelm Liquefied gas dispensing column - has expansion vessel limiting pressure between non-return and dispensing valves
DE3235056A1 (en) * 1982-09-22 1984-03-22 Sauerstoffwerk Westfalen AG, 4400 Münster Liquefied-gas filling station
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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0686833A1 (en) * 1994-06-10 1995-12-13 The Lubrizol Corporation Apparatus for metering fluids
CN1069740C (en) * 1995-06-30 2001-08-15 龙野机电技术股份公司 Gas and liquid separator for pump set
WO1998050303A1 (en) * 1997-05-05 1998-11-12 Delaware Capital Formation, Inc. Air separating fuel dispensing system
US5884809A (en) * 1997-05-05 1999-03-23 Delaware Capital Formation, Inc. Air separating fuel dispensing system
US8662862B2 (en) 1999-03-22 2014-03-04 Water Management Systems, LLC Pump system with vacuum source
US8246316B2 (en) 1999-03-22 2012-08-21 David Muhs Vacuum source and float valve for a self-priming pump
US7794211B2 (en) 1999-03-22 2010-09-14 Water Management Systems Pump System with a vacuum source coupled to a separator
US7311335B2 (en) 1999-03-22 2007-12-25 Water Management Systems Trailer and fuel tank assembly
WO2000061989A1 (en) * 1999-04-13 2000-10-19 Linde Aktiengesellschaft Method for transferring low-boiling liquids
US6179163B1 (en) * 1999-06-11 2001-01-30 Delaware Capital Formation, Inc. System and method for evaluating the presence of air in a liquid-state fuel stream
EP1490599A4 (en) * 2002-03-15 2007-07-11 Water Man Systems Pump system with vacuum source
EP1490599A2 (en) * 2002-03-15 2004-12-29 Water Management Systems Pump system with vacuum source
US7878768B2 (en) 2007-01-19 2011-02-01 David Muhs Vacuum pump with wear adjustment
US8998586B2 (en) 2009-08-24 2015-04-07 David Muhs Self priming pump assembly with a direct drive vacuum pump
DE102009047117B4 (en) * 2009-11-25 2016-06-16 Tge Marine Gas Engineering Gmbh Method and system for unloading a cargo tank for cryogenic liquefied gas
CN104948906A (en) * 2015-06-23 2015-09-30 大丰市大昌燃气设备有限公司 CNG dispenser and operation method thereof
EP4035964A1 (en) * 2021-01-29 2022-08-03 ALSTOM Holdings System for dispensing a fluid
FR3119360A1 (en) * 2021-01-29 2022-08-05 Alstom Transport Technologies Fluid delivery system

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