EP2604909A1 - Ensemble de tuyau par immersion et procédé de fonctionnement - Google Patents

Ensemble de tuyau par immersion et procédé de fonctionnement Download PDF

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Publication number
EP2604909A1
EP2604909A1 EP12196553.7A EP12196553A EP2604909A1 EP 2604909 A1 EP2604909 A1 EP 2604909A1 EP 12196553 A EP12196553 A EP 12196553A EP 2604909 A1 EP2604909 A1 EP 2604909A1
Authority
EP
European Patent Office
Prior art keywords
chamber
conduit
fluid
tank
inlet
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Withdrawn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
EP12196553.7A
Other languages
German (de)
English (en)
Inventor
Martin Haley
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.)
Forbes Technologies Ltd
Original Assignee
Forbes Technologies 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 Forbes Technologies Ltd filed Critical Forbes Technologies Ltd
Publication of EP2604909A1 publication Critical patent/EP2604909A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/54—Large containers characterised by means facilitating filling or emptying
    • B65D88/548—Large containers characterised by means facilitating filling or emptying by pneumatic means
    • 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
    • B67D7/007—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes using siphoning arrangements
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2588/00—Large container
    • B65D2588/54—Large container characterised by means facilitating filling or emptying
    • B65D2588/545—Dip tubes

Definitions

  • the present invention relates to large tanks holding hazardous liquids.
  • tanks may be constructed as shown schematically in figure 1 , with all fittings and outlets in the roof 2 of the tank 1 and a dip pipe 3 having a lower end immersed ("dipped") in the fluid 6 and feeding over the roof into an external down pipe 4 to form an outlet point 5 at ground level.
  • a dip pipe assembly for a tank containing a fluid, the assembly comprising:
  • the one-way valve allows fluid from the tank to enter the chamber. Pressurised gas may then be introduced into the chamber via the port. The gas accumulates in that part of the chamber extending above the conduit inlet when in use, thereby displacing the fluid in the chamber through the conduit inlet and into the conduit (the one-way valve prevents the fluid from leaving the chamber the same way as it came in). In this way, fluid can be pumped up the conduit to the conduit outlet and thence into a down pipe of the kind previously described, thereby inducing a siphon flow.
  • the conduit inlet may be located so as lie adjacent the vertically lowermost point in the chamber when the assembly is in use. This will ensure that almost all of the fluid in the chamber can be displaced into the conduit by the pressure of the gas.
  • the one-way valve may be located so as to lie at the vertically lowermost point in the chamber when the assembly is in use. This will ensure that fluid can enter the chamber even when the fluid level in the tank is near the bottom of the assembly.
  • the conduit may be defined by a first tube.
  • the assembly may further comprise a second tube, arranged co-axially with and radially outwardly of the first tube, the chamber being defined between the first and second tubes.
  • the first and second tubes may be substantially the same length, such that the chamber extends along substantially the entirety of the conduit.
  • the first conduit inlet may have a one-way valve such that, once fluid has been displaced from the chamber into the conduit, it may not then return to the chamber even if the pressure in the chamber is reduced.
  • a tank assembly comprising a tank having a dip pipe assembly as set out above, the conduit outlet being located vertically above the maximum fluid level of the tank when in operation.
  • the tank assembly may further have a down pipe having a down pipe inlet for fluid communication with the conduit outlet and a down pipe outlet located at a level below that of the down pipe inlet when in operation.
  • the tank assembly may further comprise a source of pressurised gas connected to the port and a pressure release valve operable to reduce the pressure of gas in the chamber once siphon flow through the conduit and down pipe is established. In this way, more fluid is allowed to flow into the chamber through the one-way valve and thence up the conduit by siphon flow.
  • the one-way valve of the chamber may be located adjacent the vertically lowermost interior surface of the tank when in operation.
  • the chamber may be connectable to the ullage space of the tank.
  • the method may comprise the step of supplying pressurised gas into the chamber so as to displace fluid into the conduit and out of the conduit outlet.
  • the method may comprise the steps of:
  • the method may comprise the steps of:
  • the step of relieving the gas pressure in the chamber may comprise connecting the chamber to the ullage space of the tank.
  • FIG 2 is a highly schematic view of a dip pipe assembly 10 supported by the roof 2 of a tank 1 containing a fluid 6.
  • the assembly has a conduit 12 having an inlet 14 immersed in the fluid and an outlet 16 above the top of the tank.
  • Conduit outlet 16 is in fluid communication with the inlet 5' of a down pipe 4 having an outlet 5 located below the inlet (typically at ground level and at or below the minimum fluid level F in the tank, as determined by the height of the conduit inlet 14).
  • Conduit inlet 14 is surrounded by a body 17 defining a chamber 18 and having a one-way valve 20 for admission of fluid from the tank and a port 22 for the admission of pressurised gas from a source 24 such as an on-site compressed air supply (suitably restricted/regulated), a mini compressor or a foot pump.
  • a source 24 such as an on-site compressed air supply (suitably restricted/regulated), a mini compressor or a foot pump.
  • the one-way valve 20 allows fluid 6 from the tank to enter and fill the chamber 18 such that the chamber is in fluid communication with the conduit inlet.
  • the chamber extends vertically above the conduit inlet 14 such that, when pressurised gas is fed into the chamber 18 via the port 22, it accumulates at the top of the chamber, thereby displacing the fluid in the chamber downwards as indicated by arrows 26.
  • the one-way valve 20 prevents the fluid from leaving the chamber the same way as it came in; instead the fluid is forced through the conduit inlet 14 and up the conduit as indicated by arrow 30. When the fluid reaches the outlet 16, it flows into the down pipe 4, thereby inducing a siphon flow as known per se.
  • the pressurised gas source 24 can be operated, e.g. manually, to reduce the pressure of gas in the chamber. This in turn allows more fluid to flow from the tank into the chamber through the one-way valve 20 and thence up the conduit by siphon flow.
  • FIG. 3 illustrates a particular embodiment of the invention.
  • a dip pipe assembly 10 is suspended from the roof 2 of a tank 1 containing a fluid 6 at a level L1. Although shown suspended in the middle of the tank, the assembly could also be bracketed to the side wall of the tank.
  • the assembly comprises a first conduit 12 defined by a first tube 13 and having an inlet 14 and an outlet 16.
  • Inlet 14 is immersed in the fluid 6 and has a one-way valve (indicated at 28 by the standard symbol for a one-way or non-return valve).
  • Outlet 16 is connected to an external down pipe 4 having an outlet point 5 at ground level.
  • the conduit outlet 16 is located vertically above (by a distance H3) the maximum fluid level 40 of the tank when in operation, i.e. above the roof 2 of the tank.
  • a second tube 19 is arranged co-axially with and radially outward of the first tube 13.
  • Tube 19 is sealed against the first tube 13 at its upper end and is blanked at its lower end 21, thereby defining a gas-tight chamber 18 that surrounds the first conduit inlet 14.
  • a perforated spacer holds tube 13 centred within tube 19.
  • the blanked end 21 of tube 19 is fitted with a spigot to which is mounted a one-way valve (indicated at 20 by the standard symbol for a one-way or non-return valve) for admission of fluid from the tank.
  • the upper end of tube 19 has a port 22 for the inlet of pressurised gas from a source 24 such as an on-site compressed air supply (suitably restricted/regulated), a mini compressor or a foot pump.
  • the one-way valve 20 allows fluid 6 from the tank to enter the chamber 18 until levels within the tank 1, chamber 18 and conduit 12 are equal. Pressurised gas is then introduced into the chamber 18 via the port 22, thereby pushing the fluid in the chamber down (as indicated by arrows 26) and through the conduit inlet 14 and its one-way valve 28 (the one-way valve 20 prevents the fluid from leaving the chamber the same way as it came in). The fluid is then pushed up the conduit (as indicated by arrow 30), out of the conduit outlet 16 and into the down pipe 4, thereby priming the down pipe and inducing a siphon.
  • the pressurised gas source 24 can be operated, e.g. manually, to reduce the pressure of gas in the chamber.
  • the gas in the chamber can be vented into the ullage space of the tank 38 via valve 36. This in turn allows more fluid to flow from the into the chamber through the one-way valve 20 and thence up the conduit by siphon flow.
  • the first and second tubes 13,19 are of substantially the same length, such that the chamber 18 extends along substantially the entirety of the conduit 12.
  • the inlet 14 is located adjacent the vertically lowermost point 32 in the chamber when the assembly is in use (the actual separation will be determined inter alia by the actual size of the valves 20 and 28) so as to ensure that almost all of the fluid in the chamber can be displaced into the first conduit by the pressure of the gas.
  • the one-way valve 20 is located at the vertically lowermost point 32 in the chamber when the assembly is in use. As shown, the length of the assembly is substantially equal to the height of the tank so that the one-way valve 20 is located adjacent the vertically lowermost interior surface 34 of the tank when in operation, allowing fluid to be extracted from the tank even at low fluid levels.
  • the gas pressure in the chamber is relieved by operating valve 36 to allow the gas and any fumes to vent into the tank ullage space 38.
  • the one-way valve 28 in the inlet 14 to the first conduit 12 prevents the fluid in the conduit 12 from flowing back into the chamber 18; instead, more fluid 6 flows into the chamber 18 via valve 20. Gas pressure can then be supplied to the chamber once again, pushing the fluid in the conduit higher still. Such pressurising / depressurising of the chamber can be repeated until the fluid reaches the outlet of the conduit and a siphon is established.
  • the present invention is for use with large tanks holding hazardous liquids.
  • Typical dimensions for the first tube 13 are 50mm bore and 63mm outside diameter and for the second tube 19 150mm bore and 160mm outside diameter, giving an approximate 11:2 ratio of cross-sectional areas.
  • Suitable one-way valves are Praher type S4 foot valves having a polypropylene body.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP12196553.7A 2011-12-12 2012-12-11 Ensemble de tuyau par immersion et procédé de fonctionnement Withdrawn EP2604909A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB1121261.0A GB201121261D0 (en) 2011-12-12 2011-12-12 Dip pipe assembly and method of operation

Publications (1)

Publication Number Publication Date
EP2604909A1 true EP2604909A1 (fr) 2013-06-19

Family

ID=45541534

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12196553.7A Withdrawn EP2604909A1 (fr) 2011-12-12 2012-12-11 Ensemble de tuyau par immersion et procédé de fonctionnement

Country Status (2)

Country Link
EP (1) EP2604909A1 (fr)
GB (2) GB201121261D0 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104016023A (zh) * 2014-06-06 2014-09-03 华南农业大学 一种液体肥料零售机
WO2017194135A1 (fr) * 2016-05-12 2017-11-16 Hewlett-Packard Development Company, L.P. Récipient de matériau de construction
CN111874858A (zh) * 2020-06-28 2020-11-03 东风汽车集团有限公司 便携式防爆无源供油装置和系统
EP3889443A1 (fr) * 2020-03-31 2021-10-06 Siemens Mobility GmbH Dispositif de levage d'aspiration destiné au vidange d'un réservoir

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2035396A (en) * 1935-03-01 1936-03-24 Linde Air Prod Co Method and apparatus for dispensing gas material
US2784560A (en) * 1954-02-11 1957-03-12 American Messer Corp Process and apparatus for storing and shipping liquefied gases
GB919774A (en) * 1960-10-05 1963-02-27 Whessoe Ltd Improvements relating to liquid storage tanks
DE2054054A1 (en) * 1970-11-03 1972-05-04 Max Planck Gesellschaft Cryostat coolant supply - with facility for switching from evaporative to gas cooling
DE2757019A1 (de) * 1976-12-23 1978-07-06 Air Liquide Verfahren und anlage zum verteilen von gas unter druck

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191216492A (en) * 1912-07-15 1912-10-31 Martini And Huneke Maschb Ag Improvements in or relating to Apparatus for Discharging Inflammable Liquids from Surface Tanks by Means of a Protective Gas Under Pressure.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2035396A (en) * 1935-03-01 1936-03-24 Linde Air Prod Co Method and apparatus for dispensing gas material
US2784560A (en) * 1954-02-11 1957-03-12 American Messer Corp Process and apparatus for storing and shipping liquefied gases
GB919774A (en) * 1960-10-05 1963-02-27 Whessoe Ltd Improvements relating to liquid storage tanks
DE2054054A1 (en) * 1970-11-03 1972-05-04 Max Planck Gesellschaft Cryostat coolant supply - with facility for switching from evaporative to gas cooling
DE2757019A1 (de) * 1976-12-23 1978-07-06 Air Liquide Verfahren und anlage zum verteilen von gas unter druck

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104016023A (zh) * 2014-06-06 2014-09-03 华南农业大学 一种液体肥料零售机
WO2017194135A1 (fr) * 2016-05-12 2017-11-16 Hewlett-Packard Development Company, L.P. Récipient de matériau de construction
US10751941B2 (en) 2016-05-12 2020-08-25 Hewlett-Packard Development Company, L.P. Build material container
EP3889443A1 (fr) * 2020-03-31 2021-10-06 Siemens Mobility GmbH Dispositif de levage d'aspiration destiné au vidange d'un réservoir
CN111874858A (zh) * 2020-06-28 2020-11-03 东风汽车集团有限公司 便携式防爆无源供油装置和系统

Also Published As

Publication number Publication date
GB2497657A (en) 2013-06-19
GB2497657B (en) 2014-04-16
GB201121261D0 (en) 2012-01-18
GB201222257D0 (en) 2013-01-23

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