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WO1996019407A1 - Procedes et appareil destines au transfert de liquides dangereux - Google Patents

Procedes et appareil destines au transfert de liquides dangereux Download PDF

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Publication number
WO1996019407A1
WO1996019407A1 PCT/AU1995/000869 AU9500869W WO9619407A1 WO 1996019407 A1 WO1996019407 A1 WO 1996019407A1 AU 9500869 W AU9500869 W AU 9500869W WO 9619407 A1 WO9619407 A1 WO 9619407A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
air
vessel
transfer vessel
suction
Prior art date
Application number
PCT/AU1995/000869
Other languages
English (en)
Inventor
Alec Martin Stevens
Original Assignee
Weedbug Pty. Ltd.
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 Weedbug Pty. Ltd. filed Critical Weedbug Pty. Ltd.
Priority to US08/875,328 priority Critical patent/US5875925A/en
Priority to AU43230/96A priority patent/AU707552B2/en
Publication of WO1996019407A1 publication Critical patent/WO1996019407A1/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
    • B67D7/02—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring liquids other than fuel or lubricants
    • B67D7/0277—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring liquids other than fuel or lubricants using negative pressure
    • 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
    • B67D7/72—Devices for applying air or other gas pressure for forcing liquid to delivery point
    • B67D7/725—Devices for applying air or other gas pressure for forcing liquid to delivery point using negative pressure

Definitions

  • THIS INVENTION relates to liquid control and/or supply systems, and it has particular but not exclusive reference to the safe handling of chemical substances in liquid form.
  • the present invention arises from considering ways of dealing with the spillage problems as aforementioned, and it accordingly has for its principal object to provide such improvements in relation to supplying or retrieving liquid from containers that the likelihood of spillage will be greatly reduced or totally removed.
  • a particular object of the invention is to provide apparatus and methods of handling liquids whereby a set quantity or predetermined or selectively variable volume may be delivered with accuracy and efficiency from a supply vessel therefor to a dispensing container, for any one of the many purposes for which such action might be required. It is a further object to provide features in the method and apparatus whereby the residual volume in the container may be retrieved easily, quickly and accurately without spillage when it is necessary to do so.
  • Yet another object of the invention is to provide liquid supply apparatus of the character described which may be of very simple and inexpensive nature, being able to be handled for all purposes by a single operator if necessary, and which will avoid the need for dismantling pumps or other ancillary equipment for cleaning same because of the need to clear contained residual chemicals.
  • the invention also aims to provide methods and apparatus for the above purposes utilising suction pump means for withdrawing air from a vessel so as to suck liquid in to take the place of the air, but having such further improvements that the suction pump means will not be reached by liquid contained in bubbles in the withdrawn air arising from liquid agitation of any kind.
  • Yet another object of the invention is to provide apparatus of the type described which may be utilised in principle, with minor modifications if necessary, to retrieve chemical spills of the type which currently occur far too frequently and which allow hazardous chemicals to enter watercourses or to pollute large areas of land.
  • Other objects and advantages of the invention will be hereinafter apparent.
  • the invention resides broadly, according to one aspect, in a method of transferring a volume of liquid from a liquid supply vessel to a dispensing container, including the steps of:
  • the invention also embraces the method of subsequently retrieving residual liquid or residue from the dispensing container, including the steps of using the transfer vessel for receiving liquid from the dispensing container by steps (1) , (2) and (3) above when the pipe means is in communication with the dispensing container in lieu of the liquid supply vessel, and then carrying out steps (4) , (5) and (6) above after transferring the pipe means from the dispensing container to the supply container or to an alternative receptacle for said residue.
  • apparatus for use in supplying liquid from a supply vessel to a dispensing container, said apparatus including: a transfer vessel adapted to receive and retain a predetermined volume of liquid between air-inlet means at an upper part thereof and liquid inlet/outlet means at a lower part thereof, said inlet/outlet means having liquid-flow pipe means adapted to be placed in liquid communication via on/off valve means with either the liquid supply vessel or the dispensing container as desired, said air-inlet means being connected by air-flow passage means to suction pump means adapted to be actuated selectively to withdraw air to desired extent from the transfer vessel so that liquid will be drawn through said inlet/outlet means when the latter is in liquid communication as aforesaid, said air-flow passage means having liquid-flow valve means operable automatically to prevent liquid entering the air-flow passage means upon reaching a predetermined level in the transfer vessel, and also having a vent valve or air- suction release valve adapted to be actuated when desired to admit
  • the features denoted for the above apparatus will enable it to be used also for retrieving residual liquid from the dispensing container and transferring it back to the liquid supply vessel or to another chosen receptacle for such residue. While the above aspects are pertinent to using a transfer vessel as an intermediary between a supply vessel and a distribution vessel, the invention can be applied with modifications to the retrieval of chemical spills. Thus, according to another aspect, the invention resides broadly in a method of transferring liquid from a supply thereof including the steps of:
  • apparatus for use in transferring liquid from a supply thereof including: a transfer vessel adapted to receive and retain liquid from said supply via a supply suction pipe connected at one of its ends to the vessel while its other end is adapted to be inserted in the supply of liquid; a pump suction line connected to an opening at an upper portion of the transfer vessel above the intended maximum liquid level and leading to suction pump means adapted to be actuated to exert suction and withdraw air from the upper portion of the transfer vessel whereby liquid may be caused to be drawn from the supply thereof through the supply suction pipe and into the transfer vessel to replace air withdrawn by the suction pump means; a bubble extraction chamber interposed in said pump suction line and of enlarged volume relative to the pump suction line, the latter being of restricted cross-section, and the parts being so made and arranged that air drawn towards the suction pump means from the transfer vessel and containing liquid bubbles arising from liquid agitation will be drawn under pressure through an air entry aperture to the chamber to imping
  • FIG. 1 shows diagrammatically the basic components of one form of liquid handling apparatus according to the invention
  • Fig. 2 shows in perspective view similar apparatus to that of Fig. 1 but shown supported by an upright structure adjacent a dispensing container of a wick-rope applicator for weedicide, given by way of example;
  • Fig. 3 shows diagrammatically in side elevation another form of liquid handling apparatus according to another embodiment of the invention and having a bubble extraction assembly of novel form;
  • FIG. 4 shows to enlarged scale and in greater detail the bubble extraction assembly of Fig. 3
  • Fig. 5 shows yet another modified form of the liquid handling apparatus according to the invention with the bubble extraction assembly of Figs. 3 and 4 fitted to a larger transfer vessel;
  • Fig. 6 shows in plan view and diagrammatically a preferred arrangement of the components in a bubble extraction chamber corresponding to those shown in Figs. 3, 4 and 5, and
  • Fig. 7 illustrates the application of the invention with appropriate modifications to the retrieval of spilled hazardous liquids by a motorised vehicle carrying liquid control apparatus of another embodiment.
  • the liquid handling apparatus indicated generally by the numeral 10 includes a transfer vessel 11 adapted to receive and retain a predetermined volume of liquid between upper air-inlet means 12 and lower liquid inlet/outlet means 13, the latter being an opening in the base 14 connected to a liquid- flow delivery and suction pipe 15 of desired length, the latter having an open terminal end 16 downstream of a manually controllable on/off valve or tap 17, the terminal end 16 being adapted to be placed in liquid communication with a supply vessel (not shown) or with a dispensing container such as that indicated by the numeral 18 in Fig. 2.
  • the air-inlet means 12 includes a floatable needle valve 19 guided for upward movement to seal against a seat 20 when liquid reaches the maximum desired level, but air suction can be applied past the needle valve 19 by means of a suction line 21 leading to a pump cylinder 22 via a one-way valve 23 which allows suction in non-return manner by the pump cylinder 22 when the plunger seal 24 is withdrawn by pulling the pump handle 25. Movement of the plunger seal 24 by pump handle 25 in the return or inwards direction is permitted by the provision of a one-way valve 26 allowing outflow of air but automatically closing when the pump handle 25 is extended so that suction will be exerted along the air suction line 21.
  • valve 19 could be of any other suitable construction instead of being a needle-type valve.
  • valve 26 which allows out-flow of air could lead via any pipe or equivalent means to an area exterior of a building and away from the workplace to cater for the fact that noxious fumes or the like might be sucked from the transfer vessel and discharged at the valve 26 under certain circumstances.
  • the transfer vessel 11 may be of any desired shape and size according to the application, suitably being transparent in its chamber portion so that graduations 27 indicate the visible volume of liquid drawn therein from its bottom.
  • the vessel 11 in Fig. 2 has a cylindrical body with secured upper and lower caps 28 and 29 for the connections to the upper suction line 21 and the lower liquid line 15 respectively.
  • a vent valve 30 is provided so that, when desired, air can be admitted to the upper end of the transfer vessel 11 and thus render ineffective suction effects provided by actuation of the pump plunger within the pump cylinder 22.
  • the method of using the apparatus will be self-apparent and has already been set out in defining the broad features of the inventive method and preferred embodiments of apparatus for carrying out the methods.
  • various known forms of quick-release couplings may be employed, including where necessary valves operating to closed attitude automatically when not connected for flow purposes.
  • sealing means can be incorporated to ensure air-tight seals wherever connections are made. It will be apparent that the invention enables supply of a measured quantity of chemical at any time and for any purpose, such as for supplying pre-mixed chemicals from a supply tank (not shown) to the dispensing container 18 of a mobile wick-wiper applicator machine shown at 31 in Fig. 2 and adapted to be actuated by and drawn by a tractor or the like.
  • the vacuum pump means can be mounted directly on the top or side of the transfer vessel so that the suction line 21 becomes merely a suction passage in an integral body member.
  • the lower inlet/outlet means could be varied to provide two openings for two pipes, one being used exclusively when connection is made to the supply vessel and the other being used exclusively when connecting to the dispensing container.
  • a bubble extraction assembly designed so that air withdrawn by the suction pump 22 from the transfer vessel 11 will pass therethrough and any bubbles contained in the air will have their liquid content separated from the air content and allowed to settle while the air continues its passage, thus preventing liquid from reaching the suction pump. Details of construction of the bubble extraction assembly are illustrated in Figs. 3 to 6.
  • Fig. 3 the components are given the same numerals as in Figs. 1 and 2 but suffixed by the letter "a”, while additionally the liquid source is indicated at 44 to which the suction/delivery hose 15a is connected through a shut-off valve 17a and a female coupling 51.
  • the transfer vessel 11a has a float operated needle valve 19a so that the pump suction hose 21a leads to the bubble extraction assembly 32a, the suction pump means being operated by the handle 25a.
  • Fig. 5 shows a similar embodiment utilising a large vacuum/storage vessel lid having a suction/delivery hose 15d provided with a shut-off valve 17d adjacent a female coupling 51d. Also shown is the bubble extraction assembly 32d having a pump handle 25d, there also being illustrated a drainage control handle 34d.
  • FIG. 4 shows the inlet hose 21a leading from the transfer vessel 11a and having a connector 33 to an air direction tube 45 leading in to a primary bubble extraction chamber 46, the tube 45 being directed downwardly and around the inner wall of the chamber 46 which is cylindrical about a vertical axis. I n this way, air containing bubbles will be caused to impinge under pressure against the arcuate wall at an upper level of the chamber 46 so that the liquid will be extracted and collected on the base of the chamber 46, while the air will continue through an aperture 55 at the upper end of the chamber 46 to pass through a one-way valve 23a into a second air direction tube 47 leading down within a secondary bubble extraction chamber 48 in the same manner as for the chamber 46.
  • Air will be drawn into the chamber 48 by pulling out the air pump handle 25a in the air pump cylinder 22a, the pump 24a being withdrawn so that the air in chamber 48 will enter an aperture 52 to pass via a pipe 53 (see dotted outline) and then through a non-return valve 26a to an air direction tube 49 in a final bubble extraction chamber 50, from which the air can pass to an exhaust air hose 40 connected through an exhaust air connector 41.
  • Air can escape from the air pump cylinder 22a via an air breather hole 43 and a breather hose 42, the latter being taken with the air hose 40 to a remote location for hygiene purposes.
  • an air shut-off valve 30a which will be kept closed when suction conditions are to be maintained, but it can be opened to collapse the suction system and allow delivery gravitationally from the storage vessel 11a in which the float operated needle valve is illustrated in dotted lines at 19a.
  • each extraction chamber 46, 48 and 50 has an outlet in the lower part of its base plate together with an O-ring adaptor 54, all adaptors being in line and having a common drainage tube 36 adapted to be moved slidably by a drainage control handle 34.
  • the tube 36 has three drainage outlets 35 adapted to register with the open bottom of each extraction chamber or to be disposed between O-ring seals 37 so that the extraction chambers will be sealably closed.
  • the tube 36 receives the content of the extraction chambers so that the liquid flows through a flexible drainage hose 38 fitted with a drainage connector 39.
  • connection is made of the hose 21a to the vessel 11a using the connector 33.
  • the handle 34 is operated to ensure that the outlets 35 in the drainage tube 36 are in closed position between the O-ring seals 37 at each of the extraction chambers 46, 48 and 50 with the drainage hose 38 being connected between the vessel 11a and the drainage connector 39.
  • the exhaust air hose 40 is connected through the exhaust air connector 41 so that any fumes will be taken away from the operator, and it is important that the air shut-off valve 30a be in closed position.
  • the breather hose 42 is connected to the air breather aperture 43.
  • the suction/delivery hose 15a is connected to the liquid supply 44 using the female coupling 51 (see Fig. 3) with the shut-off valve 17a.
  • the shut-off valve 17a (see Fig. 3) being open. Further pumping may be required to repeat the process, and when the desired volume is reached in the vessel 11a, the shut-off valve 17a is closed.
  • the float operated needle valve 19a (see Fig. 3) will prevent liquid from overfilling.
  • the hose 15a is uncoupled at the female coupling 51 from the liquid source 44 and coupled to a chosen receiving point.
  • the drainage control handle 34 can then be pulled to open the drainage outlets 35, thus releasing vacuum in the vessel 11a which allows any accumulated liquid in the bubble extraction chambers 46, 48 and 50 to drain back into the vessel 11a.
  • the air shut-off valve 30a is then opened to assist drainage of accumulated liquid from the bubble extraction chamber 46 and it will be appreciated that liquid will then flow gravitationally from the vessel 11a.
  • the velocity of the air travelling up inside the chamber to continue on towards the pump is reduced proportionately by the ratio of the tube size to the chamber size. Additional moisture removal is accomplished by the use of two bubble extraction chambers upstream of the pump, while there is a single further extraction chamber 50 downstream as illustrated.
  • the significance of this "screening" process is that if air is drawn up through most liquids in the vessel 11a, bubbles will form on top of the liquid from the agitation process and thus may be drawn up into the air pump, this being most undesirable with chemicals of any type.
  • a vacuum storage tank lib is mounted on the tray 54 of a motor truck 52 having wheels shown diagrammatically at 53.
  • the truck has a conventional liquid pump 55 so that the contents of the tank lib can be directed to any place when required including elevated locations.
  • spilt liquid indicated at 56 is picked up by a suction hose 15b having a shut- off valve 17b and leading to an upper part of the storage tank lib as opposed to a lowermost part in the earlier embodiment.
  • an air suction pump 22b receiving air via a suction line 21b, the air having passed through a bubble extraction assembly 32b having three extraction chambers 19b into which air is directed by three air direction tubes 18b.
  • a spillage occurs, best results are obtained by containing the liquid within a ring of sandbags or the like, but the suction hose 15b will operate in any event as the system does not require a flooded suction point for it to operate, and any grit or gravel sucked up through the hose 15b will not travel through the pump mechanism.
  • the bubble extraction chambers 19b are suitably of substantial size as high volumes of air will exist and thus create high bubble volumes.
  • the hose 15b is connected at an upper inlet position on the vessel 11a adjacent the uppermost working height.
  • the bubble extraction chambers are preferably of transparent material so that the buildup of liquid in them can be monitored. While apparatus as described and illustrated will be found very effective in carrying out the novel methods of the invention and achieving the objects for which the invention has been devised, it will be apparent that many modifications of constructional detail and design may be made, falling within the scope and ambit of the invention as defined by the appended claims.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

La présente invention concerne un appareil (10) de manipulation de liquides qui comporte une cuve de transfert (11) conçue pour recevoir et conserver un volume prédéterminé de liquide entre un dispositif supérieur (12) d'entrée d'air et un dispositif inférieur (13) d'entrée et de sortie de liquide; ce dernier est constitué d'une ouverture dans la base (14) de la cuve, reliée à un tuyau (15) d'aspiration et d'alimentation en flux de liquide, d'une longueur voulue, ledit tuyau ayant une extrémité terminale ouverte (16) placée en aval d'une vanne ou d'un robinet (17) de marche-arrêt à commande manuelle, cette extrémité terminale (16) étant conçue pour être placée en communication liquide avec une cuve d'alimentation (non représentée) ou avec un conteneur de distribution (tel que celui portant la référence (18) dans la figure 2). Comme tous les dispositifs de pompe aspirante peuvent être maintenus à une certaine distance des produits chimiques, seul l'air ne contenant pas de produits chimiques vient au contact desdits dispositifs et, par conséquent, ces dispositifs ne nécessiteront aucun nettoyage visant à éliminer les produits chimiques. Les procédés d'utilisation de cet appareil sont également revendiqués.
PCT/AU1995/000869 1994-12-20 1995-12-20 Procedes et appareil destines au transfert de liquides dangereux WO1996019407A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US08/875,328 US5875925A (en) 1994-12-20 1995-12-20 Methods and apparatus for transferring hazardous liquids
AU43230/96A AU707552B2 (en) 1994-12-20 1995-12-20 Methods and apparatus for transferring hazardous liquids

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPN0187 1994-12-20
AUPN0187A AUPN018794A0 (en) 1994-12-20 1994-12-20 Liquid supply systems

Publications (1)

Publication Number Publication Date
WO1996019407A1 true WO1996019407A1 (fr) 1996-06-27

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Application Number Title Priority Date Filing Date
PCT/AU1995/000869 WO1996019407A1 (fr) 1994-12-20 1995-12-20 Procedes et appareil destines au transfert de liquides dangereux

Country Status (3)

Country Link
AU (1) AUPN018794A0 (fr)
WO (1) WO1996019407A1 (fr)
ZA (1) ZA9510831B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000021876A1 (fr) * 1998-10-12 2000-04-20 Stevens Nominees (Qld) Pty Ltd. Appareil de transfert de liquides et adaptateurs
AU771879B2 (en) * 1998-10-12 2004-04-08 Stevens Nominees (Qld) Pty Ltd Liquid transfer apparatus and adaptors
CN104176693A (zh) * 2013-05-24 2014-12-03 中广核工程有限公司 一种核电站树脂转移设备
CN104555880A (zh) * 2013-10-21 2015-04-29 无锡得利鑫自动化设备有限公司 一种自流气压吸供液装置及其使用方法
CN109110721A (zh) * 2018-06-29 2019-01-01 西安西电高压开关操动机构有限责任公司 一种液压弹簧操动机构的抽真空注油系统及方法

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2172575A (en) * 1939-09-12 Suction device
US2358936A (en) * 1941-05-27 1944-09-26 Clay Adams Co Inc Pipette
GB680383A (en) * 1950-09-29 1952-10-01 W G Flaig & Sons Ltd Improvements in or relating to pipettes
US2994349A (en) * 1957-10-29 1961-08-01 Peter T Demos Pipette control device
US3290946A (en) * 1964-05-25 1966-12-13 Dow Chemical Co Pipetting device
AU2093267A (en) * 1966-04-27 1968-10-31 The Associated Octel Company Limited Method and apparatus for liquid transfer
AU3559889A (en) * 1988-05-21 1989-12-12 Wisdom Agricultural Limited Improvements in or relating to closed chemical transfer devices
AU7640191A (en) * 1990-05-08 1991-11-14 Link Research And Development, Inc. Liquid flow control system
AU7992391A (en) * 1990-05-29 1991-12-31 Earl H. Schrupp System for hermetically dispensing and diluting a concentrated chemical
AU2616492A (en) * 1991-10-18 1993-04-22 Fmc Corporation Closed transfer means

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2172575A (en) * 1939-09-12 Suction device
US2358936A (en) * 1941-05-27 1944-09-26 Clay Adams Co Inc Pipette
GB680383A (en) * 1950-09-29 1952-10-01 W G Flaig & Sons Ltd Improvements in or relating to pipettes
US2994349A (en) * 1957-10-29 1961-08-01 Peter T Demos Pipette control device
US3290946A (en) * 1964-05-25 1966-12-13 Dow Chemical Co Pipetting device
AU2093267A (en) * 1966-04-27 1968-10-31 The Associated Octel Company Limited Method and apparatus for liquid transfer
AU3559889A (en) * 1988-05-21 1989-12-12 Wisdom Agricultural Limited Improvements in or relating to closed chemical transfer devices
AU7640191A (en) * 1990-05-08 1991-11-14 Link Research And Development, Inc. Liquid flow control system
AU7992391A (en) * 1990-05-29 1991-12-31 Earl H. Schrupp System for hermetically dispensing and diluting a concentrated chemical
AU2616492A (en) * 1991-10-18 1993-04-22 Fmc Corporation Closed transfer means

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000021876A1 (fr) * 1998-10-12 2000-04-20 Stevens Nominees (Qld) Pty Ltd. Appareil de transfert de liquides et adaptateurs
US6463952B1 (en) 1998-10-12 2002-10-15 Stevens Nominees (Qld) Pty Ltd Liquid transfer apparatus and adaptors
AU771879B2 (en) * 1998-10-12 2004-04-08 Stevens Nominees (Qld) Pty Ltd Liquid transfer apparatus and adaptors
US6722389B2 (en) 1998-10-12 2004-04-20 Stevens Nominees (Qld) Pty Ltd. Liquid transfer apparatus and adaptors
CN104176693A (zh) * 2013-05-24 2014-12-03 中广核工程有限公司 一种核电站树脂转移设备
CN104176693B (zh) * 2013-05-24 2018-02-16 中广核工程有限公司 一种核电站树脂转移设备
CN104555880A (zh) * 2013-10-21 2015-04-29 无锡得利鑫自动化设备有限公司 一种自流气压吸供液装置及其使用方法
CN109110721A (zh) * 2018-06-29 2019-01-01 西安西电高压开关操动机构有限责任公司 一种液压弹簧操动机构的抽真空注油系统及方法

Also Published As

Publication number Publication date
ZA9510831B (en) 1997-06-20
AUPN018794A0 (en) 1995-01-19

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