JPH0740880A - Transport having double hull structure - Google Patents

Transport having double hull structure

Info

Publication number
JPH0740880A
JPH0740880A JP18540493A JP18540493A JPH0740880A JP H0740880 A JPH0740880 A JP H0740880A JP 18540493 A JP18540493 A JP 18540493A JP 18540493 A JP18540493 A JP 18540493A JP H0740880 A JPH0740880 A JP H0740880A
Authority
JP
Japan
Prior art keywords
space
hull
ballast tank
double
communicating
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.)
Pending
Application number
JP18540493A
Other languages
Japanese (ja)
Inventor
Yoshiaki Sezaki
良明 瀬崎
Takuji Uemura
卓司 植村
Eizo Yamaguchi
栄三 山口
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.)
Hitachi Zosen Corp
Original Assignee
Hitachi Zosen Corp
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 Hitachi Zosen Corp filed Critical Hitachi Zosen Corp
Priority to JP18540493A priority Critical patent/JPH0740880A/en
Publication of JPH0740880A publication Critical patent/JPH0740880A/en
Pending legal-status Critical Current

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  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

PURPOSE:To provide a transport by which stability can be enhanced in the hull having a double hull structure composed of an outside shell plating and an inside shell plating. CONSTITUTION:Both broadside space parts 4a and the double bottom space part 4b formed between an inside shell plating 3 and an outside shell plating 2 and 3 are communicated with each other. At the same time, plural communicating space chambers 4 having a U-shaped cross section are formed in the stern and bow direction by partitioning them by horizontal partition walls, and rectangular side part ballast tanks 11 are formed in intermediate positions corresponding to both broadsides of these communicating space chambers 4, and a bottom part ballast tank 12 is formed by communicating the column shape space parts 4c with the double bottom space part 4b in the communicating space chambers 4 in front and rear positions of the side part ballast tanks 11 on the respective broadsides.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、二重船殻構造を有する
輸送船に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transport ship having a double hull structure.

【0002】[0002]

【従来の技術】近年、原油などの液体を輸送する輸送船
においては、その安全性の面で、船体外板と船体内板と
で構成されるとともに、これら船体内外板の間に空間室
が形成されてなる二重船殻式の船体構造が提案されてい
る。
2. Description of the Related Art In recent years, in terms of safety, a transport ship for transporting liquid such as crude oil is composed of a hull outer plate and a hull inner plate, and a space chamber is formed between these hull outer plates. A double-hulled hull structure has been proposed.

【0003】そして、このような輸送船におけるバラス
トタンクとしては、船体内外板間に形成される空間室が
利用される。すなわち、図2に示すように、船体外板5
1と船体内板52との間には、空間室53が形成される
とともに、その二重底部の船体中心線に沿って、船首尾
方向で仕切り壁54が配置されて、船体の左右に、横断
面がJ型のバラストタンク55A,55Bがそれぞれ形
成されている。
As a ballast tank in such a transport ship, a space chamber formed between the inboard and outboard plates of the ship is used. That is, as shown in FIG.
A space chamber 53 is formed between 1 and the inboard plate 52, and a partition wall 54 is disposed in the bow-stern direction along the center line of the double bottom of the hull, to the left and right of the hull, Ballast tanks 55A and 55B each having a J-shaped cross section are formed.

【0004】また、図3に示すように、船体外板61と
船体内板62との間に形成される空間室63が、図2で
示したような、仕切り壁54を配置せずに、左右におけ
る舷側空間部63aと、二重底空間部63bとが互いに
連通された一体型、すなわち横断面がU型のバラストタ
ンク64として使用されるものがある。
Further, as shown in FIG. 3, the space chamber 63 formed between the hull outer plate 61 and the hull plate 62 does not have the partition wall 54 as shown in FIG. There is an integrated type in which the port side space portion 63a on the left and right sides and the double bottom space portion 63b communicate with each other, that is, used as a ballast tank 64 having a U-shaped cross section.

【0005】[0005]

【発明が解決しようとする課題】上記従来の前者の構造
によると、バラストタンク55A,55Bが左右におい
て分離されているため、例えば船体の左右いずれか一方
でかつ船首尾方向に沿って長く延びる損傷を受けた場合
には、大きい横傾斜モーメントが発生し、船体が転覆す
るという危険性がある。
According to the former structure described above, since the ballast tanks 55A and 55B are separated from each other on the left and right sides, for example, the damage is extended on one of the left and right sides of the hull and along the bow-stern direction. If it is hit, a large lateral tilting moment is generated, and there is a risk that the hull will capsize.

【0006】また、後者の構造によると、船体が損傷し
た場合に、バラストタンク64が横断面全体に亘って一
体的に形成されているため、船体に作用する横傾斜モー
メントは小さくなるが、自由表面の影響で復元力が非常
に小さくなり、すなわち復元性能が悪くなる。
Further, according to the latter structure, when the hull is damaged, the ballast tank 64 is integrally formed over the entire cross section, so that the lateral tilting moment acting on the hull becomes small, but it is free. Due to the influence of the surface, the restoring force becomes very small, that is, the restoring performance deteriorates.

【0007】そこで、本発明は上記問題を解消し得る二
重船殻構造を有する輸送船を提供することを目的とす
る。
Therefore, an object of the present invention is to provide a transportation ship having a double hull structure which can solve the above problems.

【0008】[0008]

【課題を解決するための手段】上記課題を解決するた
め、本発明の二重船殻構造を有する輸送船は、船体外板
と船体内板とで構成されてなる二重船殻構造の船体を有
する輸送船であって、船体内外板間に形成される両舷側
空間部および底部空間部とを互いに連通させるととも
に、横置隔壁により区画して船首尾方向でもって複数個
の横断面がU型の連通空間室を形成し、この連通空間室
の両舷側に対応する中間位置に、側部バラストタンクを
形成し、かつ各舷側における側部バラストタンクの前後
位置における連通空間室の柱状空間部を上記底部空間部
と連通させて底部バラストタンクを形成したものであ
る。
In order to solve the above problems, a transport ship having a double hull structure of the present invention is a hull having a double hull structure composed of a hull outer plate and a hull plate. And a space on the port side and a space on the bottom formed between the outer and inner plates of the ship, are communicated with each other, and are partitioned by a lateral bulkhead to form a plurality of transverse sections in the bow-stern direction. Forming a communication space chamber of the mold, forming a side ballast tank at an intermediate position corresponding to both port sides of the communication space chamber, and a columnar space part of the communication space chamber at the front and rear positions of the side ballast tank on each port side. To communicate with the bottom space to form a bottom ballast tank.

【0009】[0009]

【作用】上記の構成によると、例えば船体底部が損傷し
た場合には、底部バラストタンクへの浸水となり、した
がって従来のように、片側の空間容積が大きい横断面が
J型のバラストタンクへの浸水時とは異なり、横傾斜モ
ーメントが小さくなる。また、従来の横断面がU型のバ
ラストタンクへの浸水時とは異なり、側部バラストタン
クの存在により、底部バラストタンクの柱状空間部にお
いては自由表面が狭くなつているため、見掛けの重心の
上昇も非常に小さくり、したがって復元性能の低下が防
止される。
According to the above construction, when the bottom of the hull is damaged, for example, the bottom ballast tank is flooded. Therefore, as in the conventional case, the J-shaped ballast tank whose cross section has a large space volume on one side is flooded. Unlike time, the lateral tilt moment becomes smaller. Also, unlike the conventional case of flooding a U-shaped ballast tank, the free surface is narrowed in the columnar space of the bottom ballast tank due to the presence of the side ballast tank, so that the apparent center of gravity is reduced. The rise is also very small, thus preventing the restoration performance from deteriorating.

【0010】[0010]

【実施例】以下、本発明の一実施例を図1に基づき説明
する。図1において、1は船体外板2と船体内板3とで
構成されるとともにこれら内外板2,3間に空間室4が
形成されてなる二重船殻構造を有する輸送船の船体であ
る。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, reference numeral 1 denotes a hull of a transport ship having a double hull structure including a hull outer plate 2 and a hull inner plate 3 and a space chamber 4 formed between the inner and outer plates 2 and 3. .

【0011】そして、上記船体内外板2,3間に形成さ
れる空間室4は、両舷側空間部4aおよび二重底空間部
(底部空間部)4bとが互いに連通させられるととも
に、横置隔壁(図示せず)により区画して船首尾方向で
もって複数個(図1においては、その内1個分だけ図示
する)の横断面がU型の連通空間室にされている。
In the space chamber 4 formed between the inboard and outer plates 2 and 3, the port-side space portion 4a and the double bottom space portion (bottom space portion) 4b communicate with each other, and a horizontal partition wall is provided. A plurality of (only one of which is shown in FIG. 1) transverse sections are defined as U-shaped communication space chambers divided by (not shown) in the bow-stern direction.

【0012】そして、上記連通空間室4の両舷側に対応
する中間位置には、矩形状の側部バラストタンク11が
それぞれ形成され、しかも各舷側における側部バラスト
タンク11の前後位置における連通空間室4の柱状空間
部4cが上記二重底空間部4bとが連通されて底部バラ
ストタンク12が形成されている。
A rectangular side ballast tank 11 is formed at an intermediate position corresponding to both sides of the communication space chamber 4, and the communication space chambers at the front and rear positions of the side ballast tank 11 on each port side are formed. The columnar space portion 4c of 4 communicates with the double bottom space portion 4b to form the bottom ballast tank 12.

【0013】すなわち、横断面がU型の連通空間室4
が、両舷側に形成された側部バラストタンク11と、そ
の四隅の残りの柱状空間部4cを有する二重底部バラス
トタンク(底部バラストタンク)12とに分離形成され
た構造にされている。
That is, the communication space chamber 4 having a U-shaped cross section
Is separately formed into a side ballast tank 11 formed on both sides of the port and a double bottom ballast tank (bottom ballast tank) 12 having the remaining columnar spaces 4c at the four corners thereof.

【0014】なお、上記柱状空間部4cは、二重底空間
部4b内へのアクセス用および換気用トランクとしても
使用される。この構成において、例えば船体1の底部が
損傷した場合には、二重底部バラストタンク12への海
水の流入となり、したがって従来のように、片側の空間
容積が大きい横断面がJ型のバラストタンクへの浸水時
とは異なり、横傾斜モーメントが小さくなる。また、従
来の横断面がU型のバラストタンクへの浸水時とは異な
り、側部バラストタンク11の存在により、二重底部バ
ラストタンク12における自由表面が狭くなつているた
め、すなわち自由表面の面積が柱状空間部4cの水平断
面積となっているため、重心の上昇も非常に小さくな
り、したがって復元性能の低下が防止される。
The columnar space 4c is also used as a trunk for access to the double bottom space 4b and for ventilation. In this configuration, for example, if the bottom of the hull 1 is damaged, seawater will flow into the double-bottom ballast tank 12, and therefore, as in the conventional case, a ballast tank having a J-shaped cross section with a large space volume on one side is used. Unlike the case of flooding, the lateral inclination moment becomes smaller. Further, unlike the conventional case of flooding a ballast tank having a U-shaped cross section, the free surface of the double bottom ballast tank 12 is narrowed due to the presence of the side ballast tank 11, that is, the area of the free surface. Is the horizontal cross-sectional area of the columnar space 4c, the rise of the center of gravity is very small, and therefore the restoration performance is prevented from being degraded.

【0015】なお、上記二重底部バラストタンク12に
おける4隅の柱状空間部4cは、二重低空間部4bへの
アクセス用および換気用トランクとして使用できるた
め、別個にアクセス用および換気用トランクを設ける必
要がない。
Since the columnar space portions 4c at the four corners of the double bottom ballast tank 12 can be used as access trunks and ventilation trunks to the double low space portion 4b, separate access and ventilation trunks are provided. No need to provide.

【0016】[0016]

【発明の効果】以上のように本発明の構成によると、船
体外板と船体内板との間に形成された横断面がU型の連
通空間室を、船首尾方向で複数個に区画するとともに、
この区画された連通空間室の両舷側部の中間位置に、側
部バラストタンクをそれぞれ形成し、かつこの側部バラ
ストタンクの前後位置における柱状空間部を含む底部バ
ラストタンクを形成したので、例えば船体底部が損傷し
た場合には、底部バラストタンクへの浸水となり、した
がって従来のように、片側の空間容積が大きい横断面が
J型のバラストタンクへの浸水時とは異なり、横傾斜モ
ーメントが小さくなり、また従来の横断面がU型のバラ
ストタンクへの浸水時とは異なり、側部バラストタンク
の存在により、底部バラストタンクの柱状空間部におけ
る自由表面が狭くなっているため、見掛けの重心の上昇
も非常に小さくり、したがって復元性能の低下を防止す
ることができる。
As described above, according to the configuration of the present invention, the communication space chamber having a U-shaped cross section formed between the hull outer plate and the hull plate is divided into a plurality of sections in the bow-stern direction. With
Since a side ballast tank is formed at an intermediate position between both sides of the divided communication space chamber, and a bottom ballast tank including columnar spaces at the front and rear positions of the side ballast tank is formed, for example, a hull If the bottom part is damaged, it will be flooded into the bottom ballast tank. Therefore, unlike in the case of flooding a J-type ballast tank with a large cross-sectional space on one side, the lateral inclination moment will be smaller than before. Also, unlike the conventional case of flooding a ballast tank with a U-shaped cross section, the presence of the side ballast tank narrows the free surface in the columnar space of the bottom ballast tank, increasing the apparent center of gravity. Is very small, and therefore, it is possible to prevent the restoration performance from deteriorating.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例における輸送船の船体構造の
要部を示す斜視図である。
FIG. 1 is a perspective view showing a main part of a hull structure of a transport ship according to an embodiment of the present invention.

【図2】従来例における輸送船の船体の横断面図であ
る。
FIG. 2 is a lateral cross-sectional view of a hull of a transportation ship in a conventional example.

【図3】従来例における輸送船の船体の横断面図であ
る。
FIG. 3 is a transverse cross-sectional view of a hull of a transportation ship in a conventional example.

【符号の説明】[Explanation of symbols]

1 船体 2 船体外板 3 船体内板 4 連通空間室 4a 舷側空間部 4b 二重底空間部 4c 柱状空間部 11 側部バラストタンク 12 二重底部バラストタンク 1 Hull 2 Hull Outer Plate 3 Hull Inner Plate 4 Communication Space Room 4a Port Side Space 4b Double Bottom Space 4c Column Space 11 Side Ballast Tank 12 Double Bottom Ballast Tank

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】船体外板と船体内板とで構成されてなる二
重船殻構造の船体を有する輸送船であって、船体内外板
間に形成される両舷側空間部および底部空間部とを互い
に連通させるとともに、横置隔壁により区画して船首尾
方向でもって複数個の横断面がU型の連通空間室を形成
し、この連通空間室の両舷側に対応する中間位置に、側
部バラストタンクを形成し、かつ各舷側における側部バ
ラストタンクの前後位置における連通空間室の柱状空間
部を上記底部空間部と連通させて底部バラストタンクを
形成したことを特徴とする二重船殻構造を有する輸送
船。
1. A transport ship having a hull of a double-hull structure composed of a hull outer plate and a hull inner plate, and a space on both the port side and a bottom space formed between the hull outer and outer plates. Are communicated with each other, and are partitioned by a horizontal partition wall to form a plurality of U-shaped communication space chambers in the cross direction in the bow-stern direction, and the side portions are located at intermediate positions corresponding to both port sides of the communication space chambers. A double hull structure characterized by forming a ballast tank and forming a bottom ballast tank by communicating the columnar space portion of the communication space chamber at the front and rear positions of the side ballast tank on each port side with the bottom space portion. A transport ship having.
JP18540493A 1993-07-28 1993-07-28 Transport having double hull structure Pending JPH0740880A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18540493A JPH0740880A (en) 1993-07-28 1993-07-28 Transport having double hull structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18540493A JPH0740880A (en) 1993-07-28 1993-07-28 Transport having double hull structure

Publications (1)

Publication Number Publication Date
JPH0740880A true JPH0740880A (en) 1995-02-10

Family

ID=16170204

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18540493A Pending JPH0740880A (en) 1993-07-28 1993-07-28 Transport having double hull structure

Country Status (1)

Country Link
JP (1) JPH0740880A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990032819A (en) * 1997-10-21 1999-05-15 이해규 Double hull
JP2012076726A (en) * 2010-09-30 2012-04-19 Eiji Koike Ballast pumping and drainage device
CN108058789A (en) * 2016-11-08 2018-05-22 中集海洋工程研究院有限公司 It transfers platform

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990032819A (en) * 1997-10-21 1999-05-15 이해규 Double hull
JP2012076726A (en) * 2010-09-30 2012-04-19 Eiji Koike Ballast pumping and drainage device
CN108058789A (en) * 2016-11-08 2018-05-22 中集海洋工程研究院有限公司 It transfers platform

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