US3227331A - Liquid carrying vessels to facilitate the discharge therefrom of the liquid - Google Patents

Liquid carrying vessels to facilitate the discharge therefrom of the liquid Download PDF

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Publication number
US3227331A
US3227331A US383644A US38364464A US3227331A US 3227331 A US3227331 A US 3227331A US 383644 A US383644 A US 383644A US 38364464 A US38364464 A US 38364464A US 3227331 A US3227331 A US 3227331A
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US
United States
Prior art keywords
liquid
tank
plate
base
disposed
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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
US383644A
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English (en)
Inventor
Charles H Carslaw
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.)
Drysdale and Co Ltd
Original Assignee
Drysdale and Co 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 Drysdale and Co Ltd filed Critical Drysdale and Co Ltd
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Publication of US3227331A publication Critical patent/US3227331A/en
Anticipated expiration legal-status Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/007—Preventing loss of prime, siphon breakers
    • F04D9/008—Preventing loss of prime, siphon breakers by means in the suction mouth, e.g. foot valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B13/00—Conduits for emptying or ballasting; Self-bailing equipment; Scuppers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/24—Arrangement of ship-based loading or unloading equipment for cargo or passengers of pipe-lines

Definitions

  • the oil tanks of such a vessel have upstanding longitudinally and transversely disposed members attached to the base of the tanks for strengthening the structure of the vessel, the former comprising spaced, parallel longitudinal frames and the latter comprising spaced, parallel athwartship frames and bulk heads.
  • the hitherto known method of discharging the oil from each tank is to position one end of a suction pipe, the other end of which is connected to the suction in let of a pump which serves to discharge the oil, within one of the spaces defined by the lattice of longitudinal and transverse members and as near to the base of the tank as possible, limber holes being provided in the longitudinal and transverse members to permit the oil to flow, under gravity, to said one of the spaces from the remainder of the spaces as the oil is discharged from the tank.
  • the primary object of the present invention is substantially to overcome the above disadvantage and to ensure that the discharge time may be reduced to a minimum in a simple and inexpensive manner.
  • a plate is located over the, or each, of the plurality of spaces, defined by the lattice like structure of longitudinal and transverse members, in which the end of the suction pipe remote from the pump is operatively positioned, whereby to cover, but not to enclose, said space, the end portion of the suction pipe remote from the pump being disposed through or adjacent to, the plate with the associated end of the suction pipe situated adjacent to the base of the tank.
  • FIG. 1 is a vertically sectioned view of one of the plurality of spaces, defined by the lattice like structure of longitudinal and transverse members in a liquid carrying vessel, of the type referred to, according to. the invention, and
  • FIG. 2 is a plan view in the direction of the arrow A of FIG. 1.
  • 1, 1 denote two parallel, spaced longitudinal frames
  • 2 denotes a bulk head dis- 3,227,331 Patented Jan. 4, 1966 posed transversely of the vessel and therefore at right angles to the longitudinal frames
  • 1,1 and 3 denotes an athwartship frame disposed parallel to and spaced from the bulk head 2.
  • These longitudinally and transversely disposed members present a lattice-like structure defining a plurality of spaces.
  • the base of the tank is denoted by the numeral 4.
  • Limber holes 5 are formed in the frame 1.
  • Like limber holes (not shown) are also formed in the frames 1, 3 and in the bulk head 2.
  • An anti-vortex plate 6 spaced from and disposed substantially parallel to the base 4 of the tank is secured, as by the bolts 7, to the frames 1, 1' the plate 6 serving to cover, but not enclose a portion of the space defined by the frames 1, 1', 2, the bulk head 3 and the base 4 of the tank.
  • the two opposed edge portions 8 of the plate 6 between the frames 1, 1 are downwardly directed as shown particularly in FIG. 1.
  • the plate 6 is centrally formed with an aperture 9 through Which is disposed the end portion of a suction pipe 10, the opposite end of which is connected to the suction inlet of a pump (not shown), the end of the suction pipe 10 remote from the pump being outwardly belled at 11 (FIG. 1) and being located the minimum distance from the base 4 of the tank which permits the free flow, of liquid to be discharged from the tank, to the interior of the pipe 10.
  • a fixed anti-spin plate 12 is disposed, between the plate 6 and the base 4 of the tank, substantially vertically i.e. in a plane substantially at right angles to the plate 6.
  • the plate 12 is attached, as by welding, to the plate 6 but is preferably not attached to the base 4 of the tank.
  • the plate 6 serves substantially to prevent the development of vortices with consequent air locking of the pump by considerably increasing the path to the suction pipe 10 of any air vortex which develops so that the pump may operate at maximum capacity until the level of oil in the tank falls to the level of the upper edges 13 of the frames 1, 1 which are generally of the order of 18 in height from the base 4 of the tank.
  • the plate 12 also serves to prevent the development of induced vorticity within said space.
  • the rate of pumping will generally have to be reduced for discharging the remainder of the oil, below the level of the upper edges 13 of the frames 1, 1, but, as will be appreciated, the relatively small volume of oil, in comparison with the corresponding volume in the hitherto known method, which is discharged while the pump is -operated at the reduced flow rate represents a considerable saving in the time required for discharging the tank, while by providing additional strengthening members (not shown) on the frames 1, 1 2 and the bulk head 3 the cross'sectional areas of the liinber holes 5 may be increased thereby facilitating the gravity flow of the oil to said space, in which the end of the suction pipe 10 remote from the pump is located.
  • the present invention has the advantages that no moving parts are involved and the plates 6, 12 may readily be removed when, for example, it is desired to paint the interior of the tank.
  • a liquid carrying vessel of the type incorporating liquid-carrying tank means having longitudinally and transversely dispose-d members attached to the base of said tank means, in which said longitudinally and transversely disposed members present a lattice-like structure defining a plurality of spaces, a plate located over each of said plurality of spaces, whereby to cover, but not to enclose, said space, a suction pipe disposed in association with said space, the suction inlet of a pump being connected to one end of said pipe and the other end of said pipe being disposed within said space, the end portion of said pipe which presents said other end thereof being disposed in close physical relationship to said plate With said other end of said pipe located adjacent to the base of said tank means, and an anti-spin plate disposed substantially vertically between the first-mentioned plate and the base of said tank means.
  • a liquid carrying vessel of the type incorporating liquid-carrying tank means, longitudinally and transversely disposed members attached to the base of said tank means and forming a lattice-like structure defining a plurality of spaces, a plate located over at least one of said plurality of spaces to partially cover the one space, a suction pipe having its suction inlet disposed within the one space and adjacent the base of said tank means, and means disposed in said one space beneath said plate for minimizing spin in the liquid as it passes to said suction inlet.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
US383644A 1963-08-07 1964-07-20 Liquid carrying vessels to facilitate the discharge therefrom of the liquid Expired - Lifetime US3227331A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB31079/63A GB1092093A (en) 1963-08-07 1963-08-07 Improvements relating to liquid carrying vessels to facilitate the discharge therefrom of the liquid

Publications (1)

Publication Number Publication Date
US3227331A true US3227331A (en) 1966-01-04

Family

ID=10317636

Family Applications (1)

Application Number Title Priority Date Filing Date
US383644A Expired - Lifetime US3227331A (en) 1963-08-07 1964-07-20 Liquid carrying vessels to facilitate the discharge therefrom of the liquid

Country Status (7)

Country Link
US (1) US3227331A (no)
DK (1) DK111047B (no)
ES (1) ES302681A1 (no)
GB (1) GB1092093A (no)
NL (1) NL6408920A (no)
NO (1) NO115867B (no)
SE (1) SE301279B (no)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29705629U1 (de) * 1997-03-28 1997-08-07 Sotralentz S.A., Drulingen Auslaufvorrichtung zum Entleeren von Behältern, insbesondere Fässern
DE102004059851A1 (de) * 2004-12-10 2006-06-14 Wilfried Ring Behältnis für ein Fluid und Verfahren zum Ausströmenlassen eines Fluids aus einem Behältnis
CN111619732A (zh) * 2020-06-11 2020-09-04 上海外高桥造船有限公司 一种液货船及液货船的液货舱残余液体的排出方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US284172A (en) * 1883-09-04 G ream ing-can
US2465779A (en) * 1947-04-01 1949-03-29 Anders S Ahlbom Means for heating viscous liquids in ships' tanks
GB885298A (en) * 1958-02-28 1961-12-20 Jose Maria Marco Fayren Improvements in or relating to tanker vessels
GB900921A (en) * 1959-06-20 1962-07-11 Nippon Kokan Kk A ship for the transportation of high temperature molten material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US284172A (en) * 1883-09-04 G ream ing-can
US2465779A (en) * 1947-04-01 1949-03-29 Anders S Ahlbom Means for heating viscous liquids in ships' tanks
GB885298A (en) * 1958-02-28 1961-12-20 Jose Maria Marco Fayren Improvements in or relating to tanker vessels
GB900921A (en) * 1959-06-20 1962-07-11 Nippon Kokan Kk A ship for the transportation of high temperature molten material

Also Published As

Publication number Publication date
DK111047B (da) 1968-05-13
GB1092093A (en) 1967-11-22
NL6408920A (no) 1965-02-08
SE301279B (sv) 1968-05-27
ES302681A1 (es) 1965-01-01
NO115867B (no) 1968-12-16

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