EP0643012A1 - Dispositif de saturation flottant pour réservoir de stockage de combustible liquide - Google Patents

Dispositif de saturation flottant pour réservoir de stockage de combustible liquide Download PDF

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Publication number
EP0643012A1
EP0643012A1 EP94113892A EP94113892A EP0643012A1 EP 0643012 A1 EP0643012 A1 EP 0643012A1 EP 94113892 A EP94113892 A EP 94113892A EP 94113892 A EP94113892 A EP 94113892A EP 0643012 A1 EP0643012 A1 EP 0643012A1
Authority
EP
European Patent Office
Prior art keywords
saturation
pipe
floating
tank
liquid fuel
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Withdrawn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
EP94113892A
Other languages
German (de)
English (en)
Inventor
Giorgio Zucchini
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.)
SILEA Srl
Original Assignee
SILEA Srl
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 SILEA Srl filed Critical SILEA Srl
Publication of EP0643012A1 publication Critical patent/EP0643012A1/fr
Withdrawn legal-status Critical Current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
    • B67D7/061—Means for transferring liquids from a chosen level of a storage container
    • B67D7/062—Means for transferring liquids from a chosen level of a storage container from the free surface level of the liquid

Definitions

  • the present invention relates to a saturation device for tanks for liquid fuels such as gasoline, petrol and the like.
  • the air that lies above the liquid is mixed with such a percentage of fuel vapors as to be outside the explosive range (which is defined as being 1.1 to 5.4% of fuel). Indeed, this percentage can be so high as to take the mixture outside the flammability range as well.
  • known saturation devices have a saturation tray 1 which is located on the bottom of the tank 2 and contains fuel; the saturation tray 1 is connected to the outside by means of a ventilation pipe 3.
  • the air drawn in by negative pressure enters the tank after bubbling through the fuel contained in the tray so that the air becomes saturates.
  • This saturation system entails a negative pressure that must be overcome to draw the fuel; this negative pressure is proportional to the extent to which the tank is filled. Accordingly, the pump connected to the tank must withstand a stress that increases in proportion to the increase in the level difference H to be overcome.
  • the aim of the present invention is to solve the above problem by providing a saturation device for liquid fuel storage tanks that allows to minimize the negative pressure to be overcome in order to draw fuel, making said negative pressure independent of the extent to which said tank is filled.
  • said device facilitates the operation of the pump, which runs with a minimum effort, thus increasing its life and improving all its operating conditions (e.g. noise, cavitation, negative pressure, etc.).
  • an object of the present invention is to provide a saturation device which is simple in concept, safe and reliable in operation and versatile in use.
  • the invention provides a saturation device for liquid fuel storage tanks, which comprises: a ventilation pipe rigidly coupled to the top of the tank and connectable to the outside; a saturation pipe which is articulated, at one end, to said ventilation pipe so that it floats and has, at its opposite end, a curved tip portion which is suitable to ensure its immersion in the liquid fuel contained in said tank; and floating means rigidly coupled to said floating saturation pipe for keeping the free end of said saturation pipe floating on the surface of said liquid fuel.
  • the reference numeral 10 generally designates the saturation device, which is installed in a liquid fuel tank 2.
  • the buried tank 2 is provided with a conventional manhole 4.
  • the saturation device 10 has a ventilation pipe 11 which is arranged vertically at the top of the tank 2, at the manhole 4, and is rigidly coupled to a fire-stopping saturation element 12 by means of which it can be connected to the outside.
  • the fire-stopping saturation element 12 has a flange 13 by means of which it is fixed to the lid 5 of the manhole 4 (see figure 4).
  • the fire-stopping saturation element 12 is internally provided with a disk having a preset weight and allowing, in a known manner, the partial discharge of the gas in case of thermal expansion of the liquid fuel contained in the tank 2.
  • the ventilation pipe 11 is threaded in an upward region in order to fix it to the fire-stopping saturation element 12 and can be locked by means of a lock nut 14 that allows to set its angular position and height (figure 5).
  • a saturation pipe 16 is articulated to the lower end of the ventilation pipe 11 by means of a joint 15 which is practically of the elbow type (figure 6); said saturation pipe 16 is meant to float inside the tank 2.
  • the saturation pipe 16 has, at its free end, a curved tip portion 17 suitable to ensure its immersion in the liquid fuel contained in the tank 2.
  • the saturation pipe 16 is externally provided with a coaxial floating pipe 18 (figure 7) suitable to keep the free end of said saturation pipe floating on the surface of the liquid fuel, with the tip portion 17 immersed in said fuel.
  • the joint 15, which is shown in detail in figures 8 and 9, is constituted by two angular connectors or couplings 19 and 20 which are similarly provided with a threaded inlet for screw-thread coupling with a male element 21 and a female element 22 respectively.
  • the male element 21 is suitable to be rotatably inserted in the female element 22 so as to form a seal by means of a pair of annular gaskets 23; the male element 21 is axially retained by an elastic washer 24 which is suitable to abut against an internal shoulder 25 of the female element 22.
  • the angular rotation allowed to the couplings 19 and 20 is limited by the engagement of an external ridge 26 of the male element 21, which is shaped like a circular arc, within a slot 27 which is formed by the female element 22 along a circular arc that is appropriately longer.
  • a mutual angular rotation through 60 o is allowed between the extreme positions shown in figures 10 and 11.
  • the saturation pipe 16 which floats by means of the joint 15, floats at all times on the surface of the liquid contained in the tank, varying its inclination as the level of the liquid varies, as shown by the dashed line 16a.
  • the curved tip portion 17 ensures that the pipe is immersed in the liquid.
  • the articulation 15 allow the saturation pipe 16 to rotate between a substantially horizontal position when the tank is filled to its maximum level and a position which is inclined downwards by 60 o when the tank is filled to its minimum level. This limitation of course prevents the saturation pipe 16 from striking the bottom of the tank.
  • the described saturation device therefore allows to minimize the negative pressure to be overcome to draw fuel, making it independent of how full the tank is.
  • the saturation device is provided in such a manner that it can be inserted in the tank without disassembling the lid of the existing manhole, and therefore it is possible to install it in existing systems.
  • adjustment of the angular position and height of the ventilation pipe 11 allows to arrange the saturation pipe 16 so that it floats in an optimum manner, particularly avoiding interference with any pipes present inside the tank.
  • the materials employed, as well as the shapes and dimensions, may be any according to the requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
EP94113892A 1993-09-10 1994-09-05 Dispositif de saturation flottant pour réservoir de stockage de combustible liquide Withdrawn EP0643012A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO930371 1993-09-10
IT93BO000371A IT1264211B1 (it) 1993-09-10 1993-09-10 Dispositivo saturatore flottante per serbatoi di combustibili liquidi.

Publications (1)

Publication Number Publication Date
EP0643012A1 true EP0643012A1 (fr) 1995-03-15

Family

ID=11339228

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94113892A Withdrawn EP0643012A1 (fr) 1993-09-10 1994-09-05 Dispositif de saturation flottant pour réservoir de stockage de combustible liquide

Country Status (2)

Country Link
EP (1) EP0643012A1 (fr)
IT (1) IT1264211B1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1668793A (en) * 1926-10-06 1928-05-08 John H Wiggins Adjustable swing pipe for liquid-storage tanks
FR1358254A (fr) * 1963-06-04 1964-04-10 Megator Pumps & Compressors Lt Bras tubulaire flottant pour aspiration dans un réservoir de liquide
US3172581A (en) * 1963-04-19 1965-03-09 Nanni Martin Fluid withdrawal means for tanks
FR1457558A (fr) * 1965-09-13 1966-01-24 Exxon Standard Sa Prélèvements homogènes dans un liquide stocké
FR2213904A2 (fr) * 1973-01-15 1974-08-09 Muller Jacques
BE1000346A4 (fr) * 1987-02-26 1988-11-08 Vander Elst Jacques Alimentation simplifiee pour tout liquide.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1668793A (en) * 1926-10-06 1928-05-08 John H Wiggins Adjustable swing pipe for liquid-storage tanks
US3172581A (en) * 1963-04-19 1965-03-09 Nanni Martin Fluid withdrawal means for tanks
FR1358254A (fr) * 1963-06-04 1964-04-10 Megator Pumps & Compressors Lt Bras tubulaire flottant pour aspiration dans un réservoir de liquide
FR1457558A (fr) * 1965-09-13 1966-01-24 Exxon Standard Sa Prélèvements homogènes dans un liquide stocké
FR2213904A2 (fr) * 1973-01-15 1974-08-09 Muller Jacques
BE1000346A4 (fr) * 1987-02-26 1988-11-08 Vander Elst Jacques Alimentation simplifiee pour tout liquide.

Also Published As

Publication number Publication date
ITBO930371A0 (it) 1993-09-10
ITBO930371A1 (it) 1995-03-10
IT1264211B1 (it) 1996-09-23

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