EP0691304B1 - Improved by-pass valve for a fluid-supply group, in particular fuels - Google Patents

Improved by-pass valve for a fluid-supply group, in particular fuels Download PDF

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Publication number
EP0691304B1
EP0691304B1 EP95109508A EP95109508A EP0691304B1 EP 0691304 B1 EP0691304 B1 EP 0691304B1 EP 95109508 A EP95109508 A EP 95109508A EP 95109508 A EP95109508 A EP 95109508A EP 0691304 B1 EP0691304 B1 EP 0691304B1
Authority
EP
European Patent Office
Prior art keywords
fuel
supply
pump
shutter
pistol
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.)
Expired - Lifetime
Application number
EP95109508A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0691304A1 (en
Inventor
Davide Anzani
Ruben Cattaneo
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.)
Nuovo Pignone SpA
Original Assignee
Nuovo Pignone SpA
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 Nuovo Pignone SpA filed Critical Nuovo Pignone SpA
Priority to SI9530007T priority Critical patent/SI0691304T1/xx
Publication of EP0691304A1 publication Critical patent/EP0691304A1/en
Application granted granted Critical
Publication of EP0691304B1 publication Critical patent/EP0691304B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B67D7/36—Arrangements of flow- or pressure-control valves
    • 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

Definitions

  • the present invention relates to a by-pass valve according to the preamble of claim 1 for a fluid-supply group, in particular fuel, which, equipped with a ledging flange on the main shutter, which co-operates with the valve body, and a double auxiliary shutter reactivated by a spring which opens the shutter in correspondence with a certain pressure value lower than the operating value, permits the fluid to be recycled, with the supply pistol closed, at a pressure which is still lower than the operating pressure i.e. when the pistol is open, and also permits the supply to be blocked by recycling the whole fluid circulation in the presence of gaseous contents exceeding a preset limit, guaranteeing in the meantime that the hydraulic circuit of the supply group is always full of fluid even when the supply pump is deactivated.
  • a fuel-supply group generally consists of a supply pump which, activated by an electric motor, removes the fuel from the cistern by means of a filter and sends it to a centrifugal degasser from which the degassed fuel is sent, through a relief valve and relative volume measuring devices, to the supply pistol.
  • a by-pass valve is generally used, through which the degassed fuel is recycled by the suction of said pump to which a small quantity of fuel rich in gas, leaving the gas extraction pipe of said centrifugal degasser, is also sent, once it has been decanted from this gas in a reflux tank.
  • One of these known devices consists of an infra-red ray switch which is based on the different refraction index of the fuel with or without gas or air in the fuel itself. This device is very expensive however and also creates considerable complications with respect to construction and obstruction.
  • Another known device comprises a large degassing chamber with a vent into the atmosphere regulated by a floating device which is activated in the presence of certain percentages of gas or air.
  • This latter device apart from requiring extremely large and therefore large degassing chambers, is also quite inaccurate, especially with fuels having a high viscosity, and is also influenced by variations in the operating pressure.
  • a by-pass valve according to the preamble of claim 1 is known from US-A 3,715,863 where a pump/air separator apparatus for use in dispensing gasoline is disclosed which includes an air separator of the cyclone type in which air and a low percentage of gasoline are removed from the pressurized gasoline by the air separator, with the air being vented to the atmosphere and the gasoline being returned to the suction side of the pump.
  • the purpose of the present invention is to overcome the above drawbacks and consequently provide a device for blocking the supply in the presence of excess gas or air, which is economical, easy to construct and install and above all which not produces large obstructions.
  • the main shutter of the by-pass valve is equipped with a ledging flange which co-operates with the valve body.
  • the by-pass valve for a fluid-supply group comprising a hydraulic circuit wherein a supply pump, activated by a motor, removes the fuel from a cistern by means of a filter and sends it to a centrifugal degasser from which the degassed fuel is sent, through a relief valve and relative volume measuring devices, to a supply pistol
  • said by-pass valve consisting of a valve body within which a main shutter reactivated by a spring recycles the degassed fuel to the suction pipe of said pump, with the supply pistol closed, is characterized, according to the present invention, in that said main shutter is equipped with a ledging flange which co-operates with said valve body and a double auxiliary shutter activated by a spring opening said auxiliary shutter in correspondence with a certain pressure value of the fuel which is lower than that of the operating pressure with the pistol open, is activated between the hydraulic circuit after the centrifugal degasser and suction pipe of said pump.
  • the double auxiliary shutter instead of being assembled inside the main shutter of the by-pass valve, can also be inserted inside the hydraulic circuit as an additional device at any point of the hydraulic circuit before said volume measuring devices.
  • 1 indicates the pump of the fluid supply group which, activated by a motor not shown in the figure, removes, through the suction pipe 2 and filter 3, the fuel 4 from the cistern 5 and sends it to a centrifugal degasser 6 which separates its liquid or degassed fuel phase 7 from the gaseous or air phase 8 by means of the gas extraction pipe 9.
  • the small amount of fuel contained in said gaseous or air phase 8 is then decanted from the gas in a reflux tank 10 and recovered by sending it, through pipe 11, for suction by the pump 2.
  • the degassed fuel 7 is on the other hand sent, through pipe 12, to a chamber 13 and, through the relief valve 14 whose shutter 15 is closed by the spring 16, the volume measuring device 17 and flexible pipe 18, to a supply pistol 19.
  • Said chamber 13 is also connected to a by-pass valve 20 whose main shutter 21 is closed by a spring 22 and is opened only when the supply pistol 19 is closed and consequently the pressure in the chamber 13 becomes higher than the load produced by the spring 22.
  • the main shutter 21 is also equipped, on the external periphery and before the discharge channel 23, with a ledging flange 24 which co-operates with the valve body 25 of said by-pass valve 20.
  • the main shutter 21 is also hollow and inside is a double auxiliary shutter 26 activated by a spring 27 which controls with its plate 28 the communication opening 29 between the chamber 13 and discharge channel 23, and with a second plate 30 the closing of said opening 29.
  • Fig. 1 illustrates the normal supply condition with the pistol open, with the main shutter 21 and plate 28 of the double auxiliary shutter 26 both in a closed position: in this case all the degassed fuel 7 is sent to the supply pistol 19 through the relief valve 14 which is kept open by the pressure of the fuel itself.
  • Fig. 2 on the other hand illustrates the functioning of the by-pass valve 20 in the presence of an excess of air or gas in the fuel which, by causing a reduction in the pressure in the chamber 13, permits the plate 28 to be raised by the spring 27 with the consequent opening of the outlet 29 through which all the fuel 7 is recycled, also through the discharge channel 23, in pipe 11 to the suction of the pump 1: the relief valve 14 closes and the supply is therefore blocked by the pistol 19.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Lift Valve (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Pipeline Systems (AREA)
  • Check Valves (AREA)
EP95109508A 1994-07-06 1995-06-20 Improved by-pass valve for a fluid-supply group, in particular fuels Expired - Lifetime EP0691304B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI9530007T SI0691304T1 (en) 1994-07-06 1995-06-20 Improved by-pass valve for a fluid-supply group, in particular fuels

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI941403A IT1270589B (it) 1994-07-06 1994-07-06 Valvola di by-pass perfezionata per gruppo di erogazione fluidi, in particolare carburanti
ITMI941403 1994-07-06

Publications (2)

Publication Number Publication Date
EP0691304A1 EP0691304A1 (en) 1996-01-10
EP0691304B1 true EP0691304B1 (en) 1997-03-12

Family

ID=11369225

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95109508A Expired - Lifetime EP0691304B1 (en) 1994-07-06 1995-06-20 Improved by-pass valve for a fluid-supply group, in particular fuels

Country Status (8)

Country Link
EP (1) EP0691304B1 (da)
AT (1) ATE149967T1 (da)
DE (1) DE69500176T2 (da)
DK (1) DK0691304T3 (da)
ES (1) ES2099634T3 (da)
GR (1) GR3022803T3 (da)
IT (1) IT1270589B (da)
SI (1) SI0691304T1 (da)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5884809A (en) * 1997-05-05 1999-03-23 Delaware Capital Formation, Inc. Air separating fuel dispensing system
NO983944L (no) * 1998-08-27 2000-02-28 Rukko As Anordning for distribusjon av væsker
IT1313821B1 (it) * 1999-11-04 2002-09-23 Nuovo Pignone Spa Gruppo di pompaggio compatto
WO2006016793A1 (es) * 2004-08-13 2006-02-16 Jorge Cortes Garcia Sistema electromecánico que extrae el aire y los vapores del gas licuado de petroleo para su conducción y medición
EP1862429A1 (en) * 2006-05-30 2007-12-05 Dresser Wayne Ab Air separator for a fuel dispenser

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3715863A (en) * 1971-03-26 1973-02-13 Bennett Pump Inc Compact pump/air separator apparatus
DE4041249C1 (da) * 1990-12-21 1992-02-27 Tankanlagen Salzkotten Gmbh, 4796 Salzkotten, De

Also Published As

Publication number Publication date
IT1270589B (it) 1997-05-07
DE69500176T2 (de) 1997-07-17
ITMI941403A0 (it) 1994-07-06
ATE149967T1 (de) 1997-03-15
ES2099634T3 (es) 1997-05-16
DK0691304T3 (da) 1997-09-15
SI0691304T1 (en) 1997-10-31
EP0691304A1 (en) 1996-01-10
GR3022803T3 (en) 1997-06-30
ITMI941403A1 (it) 1996-01-06
DE69500176D1 (de) 1997-04-17

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