EP0267168B1 - Deck für Tankschiffe - Google Patents

Deck für Tankschiffe Download PDF

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Publication number
EP0267168B1
EP0267168B1 EP87850294A EP87850294A EP0267168B1 EP 0267168 B1 EP0267168 B1 EP 0267168B1 EP 87850294 A EP87850294 A EP 87850294A EP 87850294 A EP87850294 A EP 87850294A EP 0267168 B1 EP0267168 B1 EP 0267168B1
Authority
EP
European Patent Office
Prior art keywords
deck
vessel
deck structure
hull
tanker
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.)
Expired - Lifetime
Application number
EP87850294A
Other languages
English (en)
French (fr)
Other versions
EP0267168A1 (de
Inventor
Stig Bystedt
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.)
Stena AB
Original Assignee
Stena AB
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 Stena AB filed Critical Stena AB
Publication of EP0267168A1 publication Critical patent/EP0267168A1/de
Application granted granted Critical
Publication of EP0267168B1 publication Critical patent/EP0267168B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B3/00—Hulls characterised by their structure or component parts
    • B63B3/14—Hull parts
    • B63B3/48—Decks

Definitions

  • the present invention relates to a deck construction for marine tankers of the kind which have no centreline bulkhead and which are fitted with at least one tank which is defined by shell plating, transverse bulkheads, and deck structure in accordance with the preamble of Claim 1.
  • tanker construction There are two known kinds of tanker construction, by which is meant essentially marine vessels for transporting mainly liquid products and/or crude oil but which may also transport so-called pourable cargoes, e.g. seed.
  • the first of these vessel types includes marine vessels which are fitted with one or more centreline bulkheads and transverse frames, in order to provide the strength or rigidity required (for example SE-B 840 359 3).
  • the requisite rigidity is obtained by fitting the vessels with twin bottoms and twin hulls and by installing deck frames across the deck. This type of vessel will often require the provision of a centreline bulkhead for strength purposes.
  • the main object of the invention is therefore to provide a deck construction which will firstly permit greater tank volumes to be obtained at a given hull width, secondly results in a vessel of lighter construction, and thirdly eliminate the aforesaid drawbacks of known marine vessel constructions.
  • Figure 1 is a cross-sectional view of a tanker fitted with one or more transverse tanks 1, each tank being defined by two transverse bulkheads 4 which are mutually spaced in the fore-and-aft direction of the vessel and which are joined to the shell plating 2 and to the bottom 3 of the vessel. Since the illustrated vessel has no fore-and-aft bulkhead, the width of tank 1 will correspond to the width between the hull sides 2.
  • Adjoining the hull sides 2 is a deck construction comprising a beam 5 which is arranged in a vertical plane through the centreline of the vessel and which, e.g., may have the form of a box-beam.
  • the beam 5 is joined to the transverse bulkheads and also to inclined deck portions 6,7, which slope downwardly away from the beam to the hull sides 2 and are connected thereto.
  • the tank 1 of the illustrated embodiment will therefore be defined by the hull sides or shell platings 2, the bottom 3, two mutually sequential transverse bulkheads 4 and the deck construction comprising the beam 5 and the sloping deck portions 6 and 7.
  • the beam 5 is placed at a level which is located far above the position 8 at which the deck joins the sides of the hull or the shell plating 2.
  • the rolling angle of a tanker lies between 20-30 ° , although other rolling angles may be selected.
  • the rolling angle forms a dimensioning parameter when determining the dimensions of the vessel.
  • the angle V 1 between respective deck portions 6,7 and a horizontal plane through other points on the hull sides 2 is so selected in dependence on the chosen maximum rolling angle V 2 between the centreline plane CL of the vessel and a vertical plane as to obtain the greatest possible increase in cargo volume while decreasing the head or pressure height in the dimensioning roll position (the angle V 2 ) of the vessel.
  • head or pressure height is meant the distance, in the rolling position of the vessel, between the highest level N 1 of the liquid or the pourable cargo and the level N 2 of the joints in the tank 1 to be dimensioned.
  • the beam 5 is located at a more elevated position than the conventionally constructed deck 9, Figure 2, the rigidity or stiffness of the total ship's beam will increase considerably, which in turn enables the height of the hull sides 2 to be decreased without reducing the tank volume in comparison with the tank volume of a conventional construction.
  • Figure 2 illustrates a section which has lower hull sides 2 than the conventional construction shown to the right of the Figure.
  • a vessel which is fitted with a deck constructed according to the invention will be lighter in weight, since the hull sides can be made shorter in height and because the transverse frames 10 required in conventional constructions are not required in the inventive construction. Furthermore, the smaller deck portions 6 and 7 can be given a very light construction, due to the short distance between the beam 5 and the location 8 at which the deck portions are connected to the hull sides or shell plating. Because the hull sides can be made shorter in height, the aforesaid pressure height can be decreased, this pressure height, or head, being designated H 1 in Figure 2 for a vessel according to the invention and H 2 for a conventional vessel.
  • the cross-sectional area of the tank in the vessel fitted with a deck structure according to the invention is greater than the cross-sectional area of the tank of the conventional vessel, with both vessels having the same width, i.e. a greater tank volume is obtained despite a decrease in the height of the hull sides and despite a smaller pressure height or head.
  • this decrease in pressure heights will also result in less stresses on the hull and deck.
  • Stresses caused by hammering of the cargo are greatly reduced in a deck construction according to the invention, since angles of the order of 90 ° or thereabove are completely lacking in the construction according to the invention, wherewith it is also possible to reduce the dimensions of the plating.
  • the angle V 1 is selected so that when the vessel rolls to the maximum dimensioning roll angle V 2 , the uppermost deck portion 7 in Figure 1 will lie at least approximately in the horizontal plane.
  • the angle V 1 can be increased to at least 30 ° even when the dimensioning roll angle is about 25°.
  • the tank, or tanks is (are) particularly suited for transporting grain or cereal products, which have an angle of repose of about 30 ° .
  • the cargo space is therewith self-stowing. When the vessel rolls to the maximum roll angle, the deck portions will not lie fully horizontally, but will approach an essentially horizontal position.
  • the beam 5 When the beam 5 has the form of a box-beam, preferably a fully closed box-beam, the beam can be used advantageously as a tunnel system through which conduits, pipes etc. can be passed, therewith relieving the deck portions 6 and 7 of such conduits to a great extent.
  • reinforcements can be arranged in the interior of the beam.
  • the upper surface of the box-beam is preferably smooth, so as to facilitate access, and the undersurface of the beam which forms part of the tank wall will also be completely smooth.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Tires In General (AREA)
  • Auxiliary Methods And Devices For Loading And Unloading (AREA)

Claims (4)

1. Deckaufbau von Tankschiffen der Bauart ohne Mittellinien-Schott und mit mindestens einem Tank (1), der durch Platten (2) der Schiffshülle, Querschotten (4) und eine Deckstruktur (5, 6, 7) begrenzt ist, wobei die Deckstruktur einen Mittelabschnitt (5) und von dessen beiden Seiten wegragende Deckabschnitte (6, 7) aufweist, welche an die Hülle des Tankschiffes anstoßen und so gestaltet sind, daß bei Rollen des Tankschiffes um den Auslegungs-Rollwinkel der höchste der beiden geneigten Deckabschnitte eine mindestens angenähert horizontale Stellung einnimmt, dadurch gekennzeichnet, daß der Mittelabschnitt die Hauptaussteifung der Deckstruktur bildet und die Gestalt eines Trägers (5) hat, der sich in Richtung der Längs-Mittellinie (CL) des Tankers erstreckt und der von den Querschotten (4) unterstützt ist.
2. Deckaufbau nach Anspruch 1, dadurch gekennzeichnet, daß der Träger ein Kastenträger ist.
3. Deckaufbau nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Kastenträger (5) eine glatte Oberseite und eine glatte Unterseite hat und daß Verstärkungen im Inneren des Trägers vorgesehen sind.
4. Deckstruktur nach Anspruch 3, dadurch gekennzeichnet, daß der Kastenträger vollständig geschlossen ist und ein Tunnelsystem bildet.
EP87850294A 1986-10-31 1987-09-29 Deck für Tankschiffe Expired - Lifetime EP0267168B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8604653A SE460662B (sv) 1986-10-31 1986-10-31 Daeck foer tankfartyg
SE8604653 1986-10-31

Publications (2)

Publication Number Publication Date
EP0267168A1 EP0267168A1 (de) 1988-05-11
EP0267168B1 true EP0267168B1 (de) 1990-03-28

Family

ID=20366139

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87850294A Expired - Lifetime EP0267168B1 (de) 1986-10-31 1987-09-29 Deck für Tankschiffe

Country Status (7)

Country Link
EP (1) EP0267168B1 (de)
JP (1) JPS63173785A (de)
KR (1) KR880004998A (de)
DE (1) DE3762026D1 (de)
ES (1) ES2013778B3 (de)
NO (1) NO172223C (de)
SE (1) SE460662B (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2365384B (en) * 2000-07-26 2002-06-26 Timothy John Gunner Oil tankers
US7137345B2 (en) * 2004-01-09 2006-11-21 Conocophillips Company High volume liquid containment system for ships
US9045194B2 (en) 2012-08-09 2015-06-02 Martin Operating Partnership L.P. Retrofitting a conventional containment vessel into a complete integral tank double-hull cargo containment vessel
US9302562B2 (en) 2012-08-09 2016-04-05 Martin Operating Partnership L.P. Heating a hot cargo barge using recovered heat from another vessel using an umbilical

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191424486A (en) * 1914-12-22 1915-03-25 Per Bjorn-Roli Improved Deck for Ships.
GB261231A (en) * 1926-03-03 1926-11-18 Thomson Houston Comp Francaise Improvements in and relating to electromagnetic acoustic apparatus
FR1263995A (fr) * 1960-05-04 1961-06-19 Mac Gregor Comarain Sa Navire perfectionné
JPS6088690A (ja) * 1983-10-21 1985-05-18 Hitachi Zosen Corp 液体貨物輸送船
SE439142B (sv) * 1984-07-04 1985-06-03 Uddevallavarvet Ab Fartygsdeck

Also Published As

Publication number Publication date
DE3762026D1 (de) 1990-05-03
JPS63173785A (ja) 1988-07-18
NO874525L (no) 1988-05-02
SE460662B (sv) 1989-11-06
SE8604653D0 (sv) 1986-10-31
ES2013778B3 (es) 1990-06-01
NO172223C (no) 1993-06-23
EP0267168A1 (de) 1988-05-11
NO874525D0 (no) 1987-10-30
SE8604653L (sv) 1988-05-01
NO172223B (no) 1993-03-15
KR880004998A (ko) 1988-06-27

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