JPS6076491A - Carrier ship for low temperature liquefied gas - Google Patents
Carrier ship for low temperature liquefied gasInfo
- Publication number
- JPS6076491A JPS6076491A JP18376183A JP18376183A JPS6076491A JP S6076491 A JPS6076491 A JP S6076491A JP 18376183 A JP18376183 A JP 18376183A JP 18376183 A JP18376183 A JP 18376183A JP S6076491 A JPS6076491 A JP S6076491A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- low temperature
- insulating wall
- secondary insulating
- liquefied gas
- 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
Links
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
【発明の詳細な説明】 末完８Ａは低温液化ガス運搬船に関する。[Detailed description of the invention] Term 8A relates to low-temperature liquefied gas carriers.
通常、低温液化ガス運搬船にお−ては、タンク損傷時に
洩れた低温の液体が船体に接触して低温脆性破壊を起さ
な廖よう釦、タンク周囲に二次防壁（二次バリヤ）が設
けられている。従来、この二次防壁は、規則により、低
温用＃Ｉ（Ｅ級鋼）が使用されているが、その裏面に多
数固着される骨材には普通鋼（Ａ級鋼）が使用されてい
た。しかし、最近、既存の低温液化ガス運搬船も、ＩＭ
Ｏ（Ｉｎｔｅｒｎａ目ｏｎａｌ Ｍａｒｉｔｉｍｅ Ｏ
ｒｇａｎｌｚａｔｉｏｎ ）既存船コードに適合するよ
うに要求されつつあり、上記コードに適合しなければ入
港できないという恐れもある。ところで、このＩＭＯコ
ードによると、二次防壁の骨材も低温に耐えるようにす
ることが要求されており、従って既存船をＩＭＯコーＦ
に適合させるためＫは、二次防壁の骨材を普通鋼から低
温用鋼に交換しなければならず、タンク周囲の二次防壁
の骨材をすべて交換することは実際上不可能である。Normally, low-temperature liquefied gas carriers have a release button and a secondary barrier around the tank to prevent low-temperature liquid leaking from the tank from contacting the hull and causing low-temperature brittle fracture when the tank is damaged. It is being Conventionally, low-temperature #I (E class steel) has been used for this secondary barrier according to regulations, but ordinary steel (A class steel) has been used for the aggregate that is fixed to the back side. . However, recently, existing low-temperature liquefied gas carriers have also been
O (Internal Maritime O
rganlzation) Ships are being required to comply with the existing ship code, and there is a fear that ships that do not comply with the above code may not be able to enter port. By the way, according to this IMO code, the aggregate of the secondary barrier is also required to be able to withstand low temperatures, so existing ships cannot be used in the IMO code.
In order to comply with this, K had to change the aggregate of the secondary barrier from ordinary steel to low-temperature steel, and it is practically impossible to replace all the aggregate of the secondary barrier around the tank.
そこで、本発明は骨材を交換することなく、既存船をＩ
ＭＯコードに適合させ得るようにした低温液化ガス運搬
船を提供することを目的とする。Therefore, the present invention enables existing ships to be integrated without replacing aggregates.
It is an object of the present invention to provide a low temperature liquefied gas carrier that can comply with the MO Code.
即ち、本発明は低温液化ガス貯蔵用タンクの二次防壁に
低温用鋼が且つ二次防壁裏面に固着された骨材に普通鋼
がそれぞれ使用された既存の低温液化ガス運搬船におい
て、二次防壁内面に断熱材を取付け、二次防壁と船体外
板との間に形成される空間室内に且つ骨材の近傍に加熱
管を配置したことを＃、徴とする低温液化ガス運搬船で
、水かる構成によると、タンクから低温液体が洩れた場
合、まず断熱材により二次防壁の温度低下が防止される
と共に、たとえ二次防壁の温度が低下しても、加熱管に
より空間室内を暖めて骨材の極端な温度低下を防止でき
、従って骨材を交換することなく既存の低温液化ガス運
搬船をＩＭＯコードに適合させることができる。また、
二次防壁の断熱材は、逆に空間室内の加熱管からの熱が
タンク側に侵入するのを阻止して漏れた低温液体のガス
化を防ぐ。That is, the present invention provides a secondary barrier for an existing low-temperature liquefied gas carrier ship in which low-temperature steel is used for the secondary barrier of a tank for storing low-temperature liquefied gas, and common steel is used for the aggregate fixed to the back surface of the secondary barrier. A low-temperature liquefied gas carrier with insulation material installed on the inner surface and heating pipes placed in the space formed between the secondary barrier and the hull shell and near the aggregate. According to the structure, if low-temperature liquid leaks from the tank, the insulation material will first prevent the temperature of the secondary barrier from dropping, and even if the temperature of the secondary barrier drops, the heating pipe will warm the inside of the space and keep the bones dry. It is possible to prevent extreme temperature drops in the material, thus making it possible to bring existing cryogenic liquefied gas carriers into compliance with the IMO code without replacing the aggregate. Also,
Conversely, the insulation material of the secondary barrier prevents the heat from the heating pipe inside the space chamber from invading the tank side, and prevents the leaked low-temperature liquid from turning into gas.
以下、本発明の一実施例を図面に基づき説明する。（１
）は低温液化ガス貯蔵用タンク（２）の二次防壁（３）
に低温用鋼が且つ二次防壁（３）裏面に固着された骨材
（４）に普通鋼がそれぞれ使用された既存の低温液化ガ
ス運搬船で、貯蔵用タンク（２）から低温液体が洩れた
際、その二次防壁（３）と船体外板（５）との間に形成
された空間室（船倉底部にあっては二重底バラストタン
ク（６Ａ）又は船倉側部にあってはクイングタンク（６
Ｂ）＋６１内に位置する骨材（４ＡＸ４Ｂ）が低温にな
らないようにされている。即ち、二次防壁（３）の全周
内面には、断熱材（７）が取付けられると共に、二重底
パラストタンク（６Ａ）及びクィングタンク（６Ｂ）内
に且つ各骨材（４Ａ）（４Ｂ）の近傍位置で多数の加熱
管（例えば蒸気又は排ガスが供給される）（８）が配置
されている。なお、（９）は貯蔵用タンク（２）外面に
取付けられた断熱材である。Hereinafter, one embodiment of the present invention will be described based on the drawings. (1
) is the secondary barrier (3) of the low temperature liquefied gas storage tank (2)
In an existing low-temperature liquefied gas carrier, in which low-temperature steel was used for the secondary barrier (3) and ordinary steel was used for the aggregate (4) fixed to the back side, low-temperature liquid leaked from the storage tank (2). At the same time, the space chamber formed between the secondary barrier (3) and the hull shell (5) (double bottom ballast tank (6A) at the bottom of the hold or quenching tank at the side of the hold) Tank (6
B) The aggregate (4AX4B) located within +61 is prevented from becoming low temperature. That is, a heat insulating material (7) is attached to the entire circumferential inner surface of the secondary barrier (3), and each aggregate (4A) (4B) is installed inside the double bottom pallast tank (6A) and the king tank (6B). A number of heating pipes (8) (to which steam or exhaust gas is supplied, for example) are arranged in the vicinity of the heating tube. Note that (9) is a heat insulating material attached to the outer surface of the storage tank (2).
上記構成において、貯蔵用タンク（２）から低温液体が
洩れ九場合、まず断熱材（７）により二次防壁（３）の
温度低下が防止されると共に、たとえ二次防壁（３）の
温度が低下しても、加熱管（８１により空間室（６Ａ）
（６Ｂ）内のバラスト水又は空気を暖めて骨材（４）の
極端な温度低下を防止でき、従って骨材を交換すること
なく既存の低温液化ガス運搬船をｌ ＭＯコードに適合
させることができる。また、二次防壁（３）の断熱材（
７）は、逆に空間室（６Ａ０６Ｂ）内の加熱管（８）′
からの熱が貯蔵用タンク（２）側に侵入するのを阻止し
て、漏れた低温液体のガス化を防ぐ。In the above configuration, if low-temperature liquid leaks from the storage tank (2), the heat insulating material (7) will first prevent the temperature of the secondary barrier (3) from decreasing, and even if the temperature of the secondary barrier (3) Even if the temperature decreases, the space chamber (6A) is
The ballast water or air in (6B) can be warmed to prevent extreme temperature drops in aggregate (4), thus allowing existing cryogenic liquefied gas carriers to comply with the MO Code without replacing the aggregate. . In addition, the insulation material (
7) is, conversely, the heating tube (8)' in the space chamber (6A06B).
This prevents the heat from entering the storage tank (2) side and prevents the leaked low-temperature liquid from gasifying.
なお、上甲板（１０１部に配置された骨材（ＩＩ） Ｋ
は、上甲板（ｌＯ）自体が直接底液体に接触しないこと
と、大気に直接接触している等により、特別に暖める手
段が設けられていない。暖める必要が生じた場合は、例
えば海水等を散布すればよい。In addition, aggregate (II) K placed on the upper deck (section 101)
Since the upper deck (lO) itself does not come into direct contact with the bottom liquid and is in direct contact with the atmosphere, no special heating means is provided. If it is necessary to warm up the area, for example, seawater can be sprayed on it.
図面は本発明の一実施例の概略構成を示す半断面図であ
る。
＋１＋・・・低温液化ガス運搬船、（２）・・・貯蔵用
タンク、（３）・・・二次防壁、（４） （４Ａ）（４
Ｂ）・・・骨材、（５）・・・船体外板、（６）・・・
空間室、（６Ａ）・・・バラストタンク、（６Ｂ）・・
・クイングタンク、（７）・・・断熱材、（８）・・・
加熱管代理人 森本義弘The drawing is a half-sectional view showing a schematic configuration of an embodiment of the present invention. +1+...Low temperature liquefied gas carrier, (2)...Storage tank, (3)...Secondary barrier, (4) (4A) (4
B)... Aggregate, (5)... Hull shell, (6)...
Space chamber, (6A)...Ballast tank, (6B)...
・Quing tank, (7)...Insulation material, (8)...
Heating tube agent Yoshihiro Morimoto
Claims (1)
が且つ二次防壁裏面に固着された骨材に普通鋼がそれぞ
れ使用され九既存の低温液化ガス運搬船において、二次
防壁内面に断熱材を取付け、二次防壁と船体外板との間
に形成される空間室内に且つ骨材の近傍に加熱管を配置
したことを特徴とする低温液化ガス運搬船。1. Low-temperature steel is used for the secondary barrier of a tank for storing low-temperature liquefied gas, and ordinary steel is used for the aggregate fixed to the back of the secondary barrier. 1. A low-temperature liquefied gas carrier, characterized in that a heating pipe is arranged in a space chamber formed between a secondary barrier and a hull shell and near the aggregate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18376183A JPS6076491A (en) | 1983-10-01 | 1983-10-01 | Carrier ship for low temperature liquefied gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18376183A JPS6076491A (en) | 1983-10-01 | 1983-10-01 | Carrier ship for low temperature liquefied gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6076491A true JPS6076491A (en) | 1985-04-30 |
Family
ID=16141510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18376183A Pending JPS6076491A (en) | 1983-10-01 | 1983-10-01 | Carrier ship for low temperature liquefied gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6076491A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104986287A (en) * | 2015-06-16 | 2015-10-21 | 沪东中华造船(集团)有限公司 | Shaking stopping device for B-type enclosure system of large-scale LNG ship |
| JP2016531038A (en) * | 2013-07-22 | 2016-10-06 | デウ シップビルディング アンド マリーン エンジニアリング カンパニー リミテッド | Thermal insulation system for floating offshore structures |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5436614A (en) * | 1977-08-29 | 1979-03-17 | Mitsubishi Heavy Ind Ltd | Low-temperature liquiefied gas storage tank |
-
1983
- 1983-10-01 JP JP18376183A patent/JPS6076491A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5436614A (en) * | 1977-08-29 | 1979-03-17 | Mitsubishi Heavy Ind Ltd | Low-temperature liquiefied gas storage tank |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016531038A (en) * | 2013-07-22 | 2016-10-06 | デウ シップビルディング アンド マリーン エンジニアリング カンパニー リミテッド | Thermal insulation system for floating offshore structures |
| CN104986287A (en) * | 2015-06-16 | 2015-10-21 | 沪东中华造船(集团)有限公司 | Shaking stopping device for B-type enclosure system of large-scale LNG ship |
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