CN1910079B - A lng-carrier with spherical tanks and double bottom - Google Patents

A lng-carrier with spherical tanks and double bottom Download PDF

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Publication number
CN1910079B
CN1910079B CN2005800026208A CN200580002620A CN1910079B CN 1910079 B CN1910079 B CN 1910079B CN 2005800026208 A CN2005800026208 A CN 2005800026208A CN 200580002620 A CN200580002620 A CN 200580002620A CN 1910079 B CN1910079 B CN 1910079B
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CN
China
Prior art keywords
carrier
cavity
double bottom
space
interior end
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 - Fee Related
Application number
CN2005800026208A
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Chinese (zh)
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CN1910079A (en
Inventor
P·H·克里斯滕森
L·桑内斯
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Moss Maritime AS
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Moss Maritime AS
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Publication date
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Publication of CN1910079A publication Critical patent/CN1910079A/en
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Publication of CN1910079B publication Critical patent/CN1910079B/en
Expired - Fee Related legal-status Critical Current
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    • 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
    • B63B3/62—Double bottoms; Tank tops
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B2025/087—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid comprising self-contained tanks installed in the ship structure as separate units

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  • 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)

Abstract

A carrier arranged with at least one cargo tank preferably spherical or near spherical, for transporting liquefied gas preferably liquefied natural gas (LNG). The carrier has an outer bottom (4) and a inner bottom (3) defining a double bottom and a number of hollows (5) are provided in the inner bottom (3) and spaced in the longitudinal direction of the carrier. Each hollow is designed to accomodate a portion of each cargo tank, and wherein the distance from the inner bottom to the neutral axis of the carrier constitutes about 25 % (15-30 %) of the distance from the outer bottom to the maindeck.

Description

A kind of Double bottom liquified natural gas carrier (LNGC) with spherical tank
Technical field
The present invention relates to a kind of liquefied natural gas (LNG) carrier according to claim 1 preamble.
Background technology
Below, the ship of conveying liquified natural gas (LNG) is called carrier or LNG carrier.Those of ordinary skill understands, this expression of carrier should be equal to and is interpreted as naval vessel, ship etc.
Fluid ton is commonly used to describe the size of ship, for example the LNG carrier.The tonnage of ship is to calculate according to hull total enclosed volume and the most of effectively separation of ship.When at the harbour when passing canal computational costs and travelling tax, need utilize the tonnage of ship.Because sea-freight all over the world has various rule and practices, the method for therefore calculating ships tonnage is also different with the difference of official.
The independent method that is used to calculate ships tonnage is very important for special vessel, for example, when definite financial tariff when letting ship pass through the canal.Because Suez Canal official has formulated a kind of adhoc approach that calculates ships tonnage, this is particularly like this as the ship in the Suez Canal for getting into.According to this method, if ship is constructed to the structure with Double bottom, the computed volume of ship can reduce.When making in this way, and when comprising certain Double bottom in the design of ship, can reduce by the total volume of ship deducting the ship characteristic tonnage that the volume of Double bottom defines.
Ship can select not get into the inlet in the Suez Canal, walks around Africa but trudge, thereby has increased total duration of voyage and ship operating cost.
These special stipulation in Suez have caused the construction of novel LNG carrier, and this novel LNG carrier is particularly suitable for reaching the needs of Suez about ship calculated tonnage regulation.Also brought a kind of Double bottom of abundant definition, this Double bottom structure obviously can be accepted within the regulation of Double bottom definition, and can reach the requirement of the secure context of the Double bottom that official sets.Yet Double bottom must be suitable for guaranteeing the carrier of carrier stowage capacity.
Summary of the invention
The purpose of this invention is to provide a kind of LNG carrier, wherein, weighed for the demand of the clearly Double bottom of definition that helps to reduce the ship fluid ton with for the demand that sufficient intensity is provided for carrier and is suitable for supporting the Double bottom of LNG cargo tank.
From simple commerce or economic point of view, a kind of LNG carrier of finance tariff when having most probable Double bottom and passing the canal with reduction need be provided.But this needs must be weighed in the needs for the stable hull structure with enough compartments, sufficient intensity.
The object of the invention realizes that through the carrier according to claim 1 wherein, these aforesaid demands all are able to balance.
According to the present invention, carrier has the cargo tank that at least one transport liquefied gases is preferably liquefied natural gas (LNG).Preferably, this carrier has the cargo tank of a plurality of spheries or subglobular.This carrier is designed with the outer bottom and the interior end that forms Double bottom.Have a plurality of cavities (hollow), and said cavity is spaced at the axial direction of carrier, wherein, each cavity design is in order to hold the bottom of each cargo tank at interior the end.Distance from the interior end to the carrier axis accounts for about 25% of distance (degree of depth of ship (vessel)) from the outer bottom to the main deck.Distance from the interior end to the axis can change, thereby this percentum can change between 15%-30%.
Preferably, carrier has the side jar that is used for ballace, and the side jar separates with Double bottom, and is supported on the Double bottom top of each axial sides of carrier.Space between the interior end and outer bottom (Double bottom) is an osed top, and is preferably empty or is used for ballace.In a preferred implementation of the present invention, axially bulkhead is port space, intermediate space and right string space with the space segmentation of Double bottom.
Carrier has skirt section (skirt), is used to support cargo tank.The skirt section is connected to the cargo tank and the interior end.
Each cavity be osed top with the space between the end in guaranteeing and the outer bottom, and each cavity is deep in the space of Double bottom for the structure at the end in being arranged in.
Each empty horizontal section changes with the degree of depth in cavity.Even so, the surface at the interior end is greater than the aggregate surface of the empty horizontal section that is positioned at end horizontal surface.In a preferred implementation in cavity, successively decrease to the bottom in cavity in the horizontal section in cavity.The cavity can be hemispherical dome structure, perhaps half polygonized structure, and the horizontal section in cavity can be octagon, polygon, circle etc.
Description of drawings
Below, be described in detail with reference to the attached drawings an embodiment of the preferred embodiment for the present invention, wherein:
Fig. 1 is the transparent view of new carrier Double bottom structure.
Fig. 2 is the cross sectional drawing of new carrier in the middle of the cavity.
Fig. 3 is the cross sectional drawing according to existing design-calculated carrier.
Fig. 4 is the transparent view according to existing design-calculated carrier bottom.
The specific embodiment
Carrier shown in Fig. 1 and Fig. 2 is a kind of novel LNG carrier 1, is designed with Double bottom 2, and this Double bottom was made up of with outer bottom 4 the interior end 3.Carriers main deck is by 23 expressions.The interior end 3, have a plurality of empty 5, and the quantity in cavity 5 is corresponding to the quantity that is arranged in the cargo tank 6 on the LNG carrier 1.LNG carrier 1 also has skirt section 7, to support cargo tank.
5 horizontal section, cavity can be with the degree of depth in cavity the shape and size in change level cross section.Visible in Fig. 1, the surface at the interior end 3 is greater than the aggregate surface of the horizontal section in each cavity 5.The horizontal section in the cavity 5 of the ends 3 horizontal surface is shown as octagon in being in.Each cavity 5 is arranged at interior the end 3, with the space between the deeply interior end 3 and the outer bottom 4.In being combined in, cavity 5, keeps sealing with the space between the end in guaranteeing and the outer bottom at the end 3.
The part at the end 3 in cavity 5 can be designed to is perhaps for being connected to the absolute construction at the interior end 3.As long as each cavity 5 ability holding portion cargo tank 6, the shape in cavity 5 can change to some extent.In Fig. 1, each cavity 5 comprises a plurality of surfaces that have a down dip to the center in outer bottom 4 and cavity 5.The ends 3 horizontal location in the bottom in cavity 5 is parallel to.
The novel invention design of LNG carrier as depicted in figs. 1 and 2 will be described below, and with make comparisons like Fig. 3 and existing design shown in Figure 4.
Existing design-calculated LNG carrier shown in cross-sectional plane among Fig. 3 comprises shell 9 and inner casing 8.The shape of inner casing 8 is used to hold the bottom of cargo tank 22.Structure 8a is that rectangle is to form the support of goods jar.Said shell is divided into independent space or compartment by axial bulkhead 10,11 and transverse box 12, sees Fig. 4.Space 13a, 13b are as the side that is used for ballast water dark jar (side deep tank), and space 13c is the tunnel that is used for pipeline.The skirt section 21 that is used to support cargo tank is connected to the platform that forms as one with the side jar.
Be according to LNG carrier of the present invention shown in Fig. 2.Double bottom 2 was made up of with outer bottom 4 the interior end 3, and in the interior end 3, was furnished with the cavity 5 that is used to hold cargo tank 6 bottoms.Each cavity 5 is by inclined element 5a and horizontal cell 5b structure.Axially bulkhead 14,15 is port space 16, intermediate space 17 and starboard space 18 with the separated by spaces of Double bottom.The end 3 in the side jar 19,20 that is used for ballast water is arranged in, and the skirt section 7 that is used to support cargo tank be connected in the end 3.
When the structure of LNG transportation shell of the present invention among the structure of comparison diagram 3 mesochites and Fig. 2; It is obvious that for those of ordinary skills; LNG carrier among Fig. 3 is not configured with Double bottom, and LNG carrier of the present invention has the Double bottom that clearly limits among Fig. 2.In Fig. 3, the jar 13a, the 13b that are used for ballast water are so-called water tank, and each jar filling is positioned at the segment space of LNG carrier bottom and sidepiece.And in Fig. 2, Double bottom 2 is separated through the interior end 3 and the space 19,20 of LNG carrier sidepiece.Be positioned at sidepiece space 19,20 act as the jar that is used for ballast water, the space 16,17,18 of Double bottom can be used for ballast water or is empty space simultaneously.
In Fig. 3, the structure 8a at water tank top is a rectangle, and is to form the support of cargo tank, as shown in Figure 4.The interior end 3 of novel LNG carrier, be provided with the cavity that is used to hold cargo tank 6 among Fig. 2, and the surface at the interior like this end 3 is greater than the aggregate surface of each empty horizontal section.This ratio is not practicable for the top of water tank, sees Fig. 4, and wherein outshot is that rectangle is to hold the bottom of cargo tank 22.This structure is as Double bottom and inapplicable.
In Fig. 2 and Fig. 3, the axis is represented by NA.For making the minimum deviation of the bottom of supporting the skirt section, the interior end 3, should locate near the axis.When the distance of the axis NA from the interior end 3 to carrier accounts for from outer bottom 4 to main deck the about 25% time of 23 distance, the present invention realizes two aspects of the object of the invention; Carrier and cargo tank support has enough intensity, and clearly defines Double bottom, and satisfies the requirement of secure context of stipulative definition and the setting of Double bottom.In addition, be apparent that, when the tonnage that calculates carrier when for example getting into the Suez Canal, deduct the capacity of Double bottom.

Claims (12)

1. carrier with at least one ball-shaped cargo tank, this carrier is used for transport liquefied gases, wherein; The interior end and outer bottom that said carrier has main deck and forms Double bottom; In the interior end, have a plurality of cavities, arrange along the axially spaced-apart of carrier in this cavity, wherein; Each cavity is used to hold the part of each cargo tank, and wherein the distance from the interior end to the carrier axis accounts for the 15%-30% of the distance from the outer bottom to the main deck.
2. carrier according to claim 1, wherein, this carrier is used for conveying liquified natural gas.
3. carrier according to claim 1, wherein, the distance from the interior end to the carrier axis accounts for 25% of distance from the outer bottom to the main deck.
4. according to any described carrier in the claim 1 to 3, wherein, the side jar and the Double bottom that are used for ballace are separated, and are supported in the top of Double bottom.
5. according to any described carrier among the claim 1-3, wherein, the skirt section that is used to support cargo tank is connected to the interior end of Double bottom.
6. according to any described carrier among the claim 1-3, wherein, the space between the interior end and outer bottom is an osed top, and as slack tank or ballast tanks.
7. according to any described carrier among the claim 1-3, wherein, axially bulkhead is port space, intermediate space and right string space with the separated by spaces of Double bottom.
8. carrier according to claim 7, wherein, each cavity be osed top with the space between the end in guaranteeing and the outer bottom, and each cavity is deep in the space of Double bottom for the structure at the end in being arranged in.
9. according to any described carrier among the claim 1-3, wherein, the horizontal section in cavity changes with the degree of depth in cavity, and the surface at the interior end is greater than the horizontal section sum that is positioned at end horizontal surface in each cavity.
10. according to any described carrier among the claim 1-3, wherein, the cavity is semisphere or half polygonized structure, and the horizontal section in cavity is polygon, circle.
11. carrier according to claim 10, wherein, the horizontal section in said cavity is an octagon.
12. according to any described carrier among the claim 1-3, wherein, successively decrease to the bottom in cavity in the horizontal section in cavity.
CN2005800026208A 2004-01-28 2005-01-21 A lng-carrier with spherical tanks and double bottom Expired - Fee Related CN1910079B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0401847A GB2410471B (en) 2004-01-28 2004-01-28 An LNG-carrier with spherical tanks and double bottom
GB0401847.9 2004-01-28
PCT/NO2005/000026 WO2005073069A1 (en) 2004-01-28 2005-01-21 A lng-carrier with spherical tanks and double bottom

Publications (2)

Publication Number Publication Date
CN1910079A CN1910079A (en) 2007-02-07
CN1910079B true CN1910079B (en) 2012-11-28

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EP (1) EP1711395B1 (en)
JP (1) JP4774373B2 (en)
KR (1) KR20060127958A (en)
CN (1) CN1910079B (en)
DE (1) DE602005021457D1 (en)
GB (1) GB2410471B (en)
WO (1) WO2005073069A1 (en)

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JP2015217749A (en) * 2014-05-15 2015-12-07 川崎重工業株式会社 Ship body support structure of liquefied gas tank, and liquefied gas carrier
CN104787249B (en) * 2015-03-27 2017-04-26 浙江欣海船舶设计研究院有限公司 River-sea transportation double-fuel LNG tank car transport ship
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Publication number Publication date
GB0401847D0 (en) 2004-03-03
EP1711395A1 (en) 2006-10-18
WO2005073069A1 (en) 2005-08-11
JP2007519572A (en) 2007-07-19
EP1711395B1 (en) 2010-05-26
CN1910079A (en) 2007-02-07
KR20060127958A (en) 2006-12-13
DE602005021457D1 (en) 2010-07-08
JP4774373B2 (en) 2011-09-14
GB2410471A (en) 2005-08-03
GB2410471B (en) 2007-04-11

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