WO2001068508A1 - Clapet de regulation a fermeture automatique servant a la distribution de liquides - Google Patents

Clapet de regulation a fermeture automatique servant a la distribution de liquides Download PDF

Info

Publication number
WO2001068508A1
WO2001068508A1 PCT/EP2001/003044 EP0103044W WO0168508A1 WO 2001068508 A1 WO2001068508 A1 WO 2001068508A1 EP 0103044 W EP0103044 W EP 0103044W WO 0168508 A1 WO0168508 A1 WO 0168508A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
piston
liquid
chamber
vacuum
Prior art date
Application number
PCT/EP2001/003044
Other languages
English (en)
Inventor
Giorgio Bacchio
Original Assignee
Universita' Degli Studi Di Pavia
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 Universita' Degli Studi Di Pavia filed Critical Universita' Degli Studi Di Pavia
Priority to AU2001260131A priority Critical patent/AU2001260131A1/en
Priority to AT01933717T priority patent/ATE251084T1/de
Priority to EP01933717A priority patent/EP1274646B1/fr
Priority to DE60100902T priority patent/DE60100902D1/de
Publication of WO2001068508A1 publication Critical patent/WO2001068508A1/fr

Links

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
    • B67D7/42—Filling nozzles
    • B67D7/44—Filling nozzles automatically closing
    • B67D7/46—Filling nozzles automatically closing when liquid in container to be filled reaches a predetermined level
    • B67D7/48—Filling nozzles automatically closing when liquid in container to be filled reaches a predetermined level by making use of air suction through an opening closed by the rising liquid

Definitions

  • the present invention refers to an automatically closing control valve for the delivery of liquids, in particular for low pressure delivery circuits in which the liquid is delivered due to gravity.
  • Circuits for the low pressure distribution of liquids are used in applications where large liquid flows are unnecessary.
  • relatively small containers are filled with different liquids, e.g. water or other.
  • the ducts of the hydraulic distribution system of the liquid have interception taps or valves, that may be opened manually or automatically and are equipped with safety devices to automatically close the tap or valve upon reaching the desired level in the container or vessel, thus avoiding liquid spilling over the edge resulting in damage to the surrounding area, especially when using corrosive liquids.
  • the present invention aims to obviate the above mentioned drawbacks of the known valves which automatically close liquid distribution circuits upon reaching a predetermined liquid level, especially in the case of circuits operating at low pressure.
  • One of the main aims of the present invention is to produce a valve with high operating reliability and structural simplicity including a minimum number of component parts.
  • a further aim of the present invention is to produce a valve that is also cheap to produce.
  • an automatically closing control valve for the delivery of liquids particularly in low pressure delivery circuits, which according to claim 1 , includes a main casing, an entry and an exit aperture of the liquid, a main internal chamber of basically cylindrical shape, in which a piston slides along the axial direction of said main chamber, said piston defining, with its movement, at least one opening and one closing position of said entry and exit apertures, said valve also having return elastic means of said piston towards said closing position, holding means of said piston in an opening position and monitoring means of a predetermined maximum level of liquid delivered into a container, characterised in that said monitoring means are operatively connected to pneumatic actuation means suitable to interact with said means holding said piston in an opening position to control the activation of said return elastic means to put the same piston in a closing position when said predetermined maximum level of delivered liquid is reached.
  • valve interrupts the delivery of the liquid upon reaching the desired level in the container in an automatic and reliable way, though presenting a simple configuration.
  • a duct having a section shaped as a Venturi tube is connected to said exit aperture to generate, upon passage of the liquid, a vacuum in said pneumatic actuation means.
  • figure 1 represents a sectional view of a first embodiment of the valve, according to the invention
  • figure 2 represents a sectional view of a second embodiment of the valve, according to the invention.
  • a valve denoted as a whole, by 1 includes a main casing 2, basically of elongated form and set in a basically horizontal position during operation.
  • a duct 3 of liquid entry connected to a hydraulic circuit of known type and not shown in the figures, is connected to an entry aperture or port 3' made in the upper part of the valve casing.
  • an exit duct or nozzle 4 set in a basically vertical position, that supplies a container B with liquid, flowing due to gravity in the direction of arrow S.
  • the interior of the valve casing bears, for most of its length, a cylindrical chamber 5 in which is set a piston 6 which may move inside said chamber 5.
  • the piston has rubber rings 7 which ensure a goods seal with the internal walls of the chamber 5.
  • the piston 6 is secured to a control rod 8 which bears a knob 9 or similar, at its end external to the valve, which can be operated by pressure exerted manually or with an actuator used by the operator.
  • the rod 8 is kept in an extracted position by a spring 10, which in figure 1 is positioned to the left of the valve. In this position, the piston 6 totally blocks both apertures 3', 4' of ducts 3, 4 completely closing the passage of the liquid.
  • the knob 9 of rod 8 sliding the piston towards the right-hand part of figure 1 , the ducts 3 and 4 communicate with each other and the liquid starts to flow through valve 1.
  • the end section 4" of the duct 4 is shaped as a Venturi tube. In flowing inside the nozzle 4", the liquid creates a Bernoulli effect which transmits a vacuum through duct 11 to the right-hand part of the chamber 5.
  • the force exerted by the vacuum acts on the piston 6 and counterbalances the returning action of the spring 10, keeping the rod 8 in a recessed position in the casting 2 and the piston 6, shifted towards the right-hand part in relation to the figure, keeps the entry duct 3 in communication with the exit duct 4.
  • a duct 12, which is considerably narrower that duct 11 is set in a basically vertical position in relation to the liquid level in container B. Its upper aperture leads into duct 11.
  • the duct 12 serves as a probe through which a flow of air is generated, directed upwards in the direction of the arrow 14, by the vacuum created in the nozzle 4".
  • This valve 17 is kept in a closing position by a spring 18 which closes a duct 19 which puts the chamber 5 in communication with the outside, where atmospheric pressure is generally present, through apertures not shown in the figure.
  • the probe 12 does not come into contact with the liquid, its lower aperture stays free and a large amount of the force generated by the vacuum acts through duct 11 on the piston 6.
  • the distribution of the passage of the vacuum through the various ducts is obtained through appropriate choice of the dimension of the sections of ducts 11 , 12 and 13.
  • the probe 12 thus acts as a by-pass duct and the amount of vacuum transmitted instead through the duct 13 in the second chamber 15 is insufficient to compress the spring 18, allowing the valve 17 to open.
  • the lower end of the probe 12 is reached by the liquid level delivered into container B by main duct 4, its aperture closes and the air flow which ran in the same duct 12 is thus interrupted.
  • the vacuum present in duct 12 tends to suck the liquid in it upwards, but a priority action is caused in duct 13 since the liquid density is greater than that of the air and therefore the vacuum is diverted into the second chamber 15 through tube 13.
  • the vacuum builds up due to the passage of the liquid inside nozzle 4" and this increase of the vacuum in the chamber 15 is sufficient to produce a force acting on the membrane 16 which, becoming deformed, is able to compress the spring 18.
  • valve 17 is moved by the membrane 16 and opens the duct 19 allowing the external air to flow into chamber 5 since the pressure inside it rises to that of atmospheric level.
  • the piston 6 is pushed towards the left part, due to the concurrence of the returning action of spring 10 and of the pressure acting in the right-hand part of chamber 5, and simultaneously closes the entry and exit apertures (3', 4').
  • valve 1 is thus automatically brought back to its closing position in which the piston 6 is towards the left part of the figure. As long as the probe 12 stays closed by contact with the liquid surface in container B, the valve 1 cannot be opened again, unless knob 9 is kept pressed by an operator, since the vacuum which should prevail in ducts 11 and 13 is insufficient to keep the piston 6 in a moved position towards the right-hand part of the chamber 5.
  • the piston 6 in its rest position, shown in figure 2, prevents communication between the delivery ducts 3 and 4.
  • a spring 20 keeps the piston in this closing position.
  • a rod 21 is joined at the piston 6 at its end which is internal to the chamber 5 and has a knob 9 at its other end.
  • the rod 21 is pulled to the right side in figure 2, acting against the force exerted by spring 20, to put the delivery ducts 3 and 4 in communication with each other.
  • the rod 21 also has a tooth 22, axially protruding from the external surface, which beats against an end 25 of a lever 23, fixed around a fulcrum to the frame of valve 1 at point 24, when the rod 21 reaches the extracted position to the right of the figure upon manual or automatic operation by an operator. In this position, the tooth 22 keeps the piston 6 locked in a position where the delivery ducts (3,4) are in communication with each other and the liquid is able to flow into container B.
  • a Bernoulli effect is caused which transmits a vacuum towards the probe 26 open at its lower part.
  • a second duct 27 communicates, at one end, with duct 4 and with the probe 26 in its intermediate section. Its other end is in communication with a chamber 28 closed on one side by a flexible membrane 29.
  • the membrane 29 is connected to lever 23 by a tie rod 30 which when pressed may turn the lever 23 around the fulcrum 24.
  • duct sections 26 and 27 ensures that during liquid delivery through valve 1 , as long as the lower section of duct 26 stays open, the vacuum generated by nozzle 4" and transmitted through duct 27 into chamber 28 is unable to deform the membrane 29 so as to turn lever 23 downwards and thus release tooth 22 of lever 21. In fact, a large part of the vacuum flows through the probe 26.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Coating Apparatus (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

La présente invention concerne un clapet de régulation à fermeture automatique destiné à des liquides, ledit clapet comprenant des ouvertures d'entrée (3') et de sortie (4') et un compartiment interne (5) dans lequel se déplace un piston (6) qui ouvre et ferme les ouvertures d'entrée (3') et de sortie (4'). Le clapet (1) comprend des ressorts (10, 20) qui mettent le piston (6) en position fermée, des éléments mécaniques ou pneumatiques (11, 22, 23) qui servent à maintenir le piston (6) en position ouverte et une sonde de contrôle (12, 26). La sonde (12, 26) communique avec les éléments pneumatiques (15, 16, 28, 29) qui servent à maintenir le piston (6) en position ouverte et qui font fonctionner les ressorts (10, 20) qui provoquent le retour du piston (6) jusqu'à ce que celui-ci atteigne le niveau maximum. L'ouverture (4') est reliée à la buse (4'') se présentant sous la forme d'un tube de Venturi qui produit le vide nécessaire à l'activation des éléments pneumatiques (15, 28).
PCT/EP2001/003044 2000-03-16 2001-03-16 Clapet de regulation a fermeture automatique servant a la distribution de liquides WO2001068508A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU2001260131A AU2001260131A1 (en) 2000-03-16 2001-03-16 An automatically closing control valve for the delivery of liquids
AT01933717T ATE251084T1 (de) 2000-03-16 2001-03-16 Selbstschliessendes ventil für flüssigkeitsabgabe
EP01933717A EP1274646B1 (fr) 2000-03-16 2001-03-16 Clapet de regulation a fermeture automatique servant a la distribution de liquides
DE60100902T DE60100902D1 (de) 2000-03-16 2001-03-16 Selbstschliessendes ventil für flüssigkeitsabgabe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2000MI000539A IT1317629B1 (it) 2000-03-16 2000-03-16 Valvola di controllo dell'erogazione di liquidi a chiusura automatica
ITMI2000A000539 2000-03-16

Publications (1)

Publication Number Publication Date
WO2001068508A1 true WO2001068508A1 (fr) 2001-09-20

Family

ID=11444476

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/003044 WO2001068508A1 (fr) 2000-03-16 2001-03-16 Clapet de regulation a fermeture automatique servant a la distribution de liquides

Country Status (7)

Country Link
US (1) US20030089422A1 (fr)
EP (1) EP1274646B1 (fr)
AT (1) ATE251084T1 (fr)
AU (1) AU2001260131A1 (fr)
DE (1) DE60100902D1 (fr)
IT (1) IT1317629B1 (fr)
WO (1) WO2001068508A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1398295A1 (fr) * 2002-09-10 2004-03-17 Elaflex Tankstellentechnik GmbH & Co. Vanne de soutirage d'essence

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9090157B2 (en) * 2010-02-04 2015-07-28 Myers Industries, Inc. Spill avoidance system for storage tank
WO2016145399A1 (fr) 2015-03-12 2016-09-15 Fluidmaster, Inc. Déviateur de flux muni d'anti-siphon

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE498076A (fr) *
US2870800A (en) * 1957-12-06 1959-01-27 Toby B Harper Automatic liquid delivery shut-off device
CH355045A (de) * 1956-05-03 1961-06-15 Liquid Controls Corp Abfüll-Ventil
GB1493805A (en) * 1974-12-17 1977-11-30 Exxon Research Engineering Co Apparatus for automatic control of liquid flow

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US487531A (en) * 1892-12-06 Barrel-filler
US2787294A (en) * 1952-04-19 1957-04-02 S A T A M Sa Appareillages Mec Combined valve and shut-off means therefor
US2822830A (en) * 1954-01-26 1958-02-11 F Wenger Ets Bottle filling devices
US3085600A (en) * 1961-02-14 1963-04-16 Dover Corp Automatic dispensing nozzles
US3646974A (en) * 1970-03-23 1972-03-07 Dover Corp Automatic shutoff dispensing nozzle venturi
US4343337A (en) * 1980-07-09 1982-08-10 Healy James W Fuel dispensing nozzle
DE3528612C1 (de) * 1985-08-09 1986-12-11 Karlheinz 2000 Hamburg Ehlers Zapfpistole fuer Kraftstoff mit fuellhoehenabhaengiger Abschaltautomatik und pumpendruckabhaengiger Sicherheitsvorrichtung
FR2592869B1 (fr) * 1986-01-15 1988-03-11 Seva Dispositif de remplissage de recipients a contre-pression
FR2606008B1 (fr) * 1986-11-05 1989-07-28 Mapco Tete de remplissage pour machine de remplissage de bouteilles et machine de remplissage equipee de telles tetes de remplissage
DE3825093C2 (de) * 1988-07-23 1994-01-13 Kronseder Maschf Krones Verfahren und Vorrichtung zum Füllen von Flaschen oder dgl. in Gegendruckfüllmaschinen
US4913200A (en) * 1989-01-19 1990-04-03 Richards Industries, Inc. Liquid dispensing nozzle with a pump pressure responsive automatic shut-off mechanism
US5178197A (en) * 1992-01-02 1993-01-12 Healy Systems, Inc. Fuel dispensing nozzle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE498076A (fr) *
CH355045A (de) * 1956-05-03 1961-06-15 Liquid Controls Corp Abfüll-Ventil
US2870800A (en) * 1957-12-06 1959-01-27 Toby B Harper Automatic liquid delivery shut-off device
GB1493805A (en) * 1974-12-17 1977-11-30 Exxon Research Engineering Co Apparatus for automatic control of liquid flow

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1398295A1 (fr) * 2002-09-10 2004-03-17 Elaflex Tankstellentechnik GmbH & Co. Vanne de soutirage d'essence

Also Published As

Publication number Publication date
DE60100902D1 (de) 2003-11-06
US20030089422A1 (en) 2003-05-15
EP1274646A1 (fr) 2003-01-15
ATE251084T1 (de) 2003-10-15
ITMI20000539A1 (it) 2001-09-16
AU2001260131A1 (en) 2001-09-24
EP1274646B1 (fr) 2003-10-01
IT1317629B1 (it) 2003-07-15

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