JPH0442233Y2 - - Google Patents
Info
- Publication number
- JPH0442233Y2 JPH0442233Y2 JP1986125300U JP12530086U JPH0442233Y2 JP H0442233 Y2 JPH0442233 Y2 JP H0442233Y2 JP 1986125300 U JP1986125300 U JP 1986125300U JP 12530086 U JP12530086 U JP 12530086U JP H0442233 Y2 JPH0442233 Y2 JP H0442233Y2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- liquefied gas
- gas tank
- hull
- prevention device
- 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
Links
- 230000002265 prevention Effects 0.000 claims description 23
- 239000012774 insulation material Substances 0.000 claims description 8
- 238000005188 flotation Methods 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 239000011810 insulating material Substances 0.000 description 10
- 239000011120 plywood Substances 0.000 description 6
- 238000009413 insulation Methods 0.000 description 5
- 239000012212 insulator Substances 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 239000000969 carrier Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Description
【考案の詳細な説明】
［産業上の利用分野］
本考案は液化ガス運搬船の船倉内浸水時にタン
クが浮上するのを防止する液化ガス運搬船のタン
クの浮上防止装置に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a floating prevention device for a tank of a liquefied gas carrier, which prevents the tank from floating when the hold of the liquefied gas carrier is flooded.
［従来の技術］
一般に液化ガス運搬船には船倉内浸水時に液化
ガスタンクが浮上するのを防止するために浮上防
止装置が備えられている。[Prior Art] Generally, liquefied gas carriers are equipped with a surfacing prevention device to prevent liquefied gas tanks from surfacing when the cargo hold is flooded.
従来、この液化ガス運搬船のタンク浮上防止装
置ａは第３図、第４図及び第５図に示す如く構成
されていた。図示するように、液化ガス運搬船ｂ
の船倉ｃ内にはその船底部ｄに自立して液化ガス
タンクｅが設けられている。この液化ガスタンク
ｅの頂部ｆは矩形の平面に形成され、その四隅に
は４つの浮上防止装置ａが上方に突出して配置さ
れている。 Conventionally, the tank flotation prevention device a of this liquefied gas carrier has been constructed as shown in FIGS. 3, 4, and 5. As shown, liquefied gas carrier b
In the hold c of the ship, a liquefied gas tank e is provided independently on the bottom d of the ship. The top f of the liquefied gas tank e is formed into a rectangular plane, and four floating prevention devices a are arranged at the four corners of the top f to project upward.
この浮上防止装置ａは直方体状の強化合板ブロ
ツクｇにて形成され、ブラケツトｈにて固定され
ている。そして、この浮上防止装置ａが設けられ
た部分以外の液化ガスタンクｅの外壁は、保冷材
ｉにて覆われている。 This floating prevention device a is formed of a reinforced plywood block g in the shape of a rectangular parallelepiped, and is fixed with a bracket h. The outer wall of the liquefied gas tank e other than the portion where the floating prevention device a is provided is covered with a cold insulating material i.
このように構成された浮上防止装置ａは船倉ｃ
内浸水時に液化ガスタンクｅが浮上し始めると液
化ガスタンクｅの頂部ｆに設けられた浮上防止装
置ａである強化合板ブロツクｇがこれに相対向し
て位置された船体部ｊに当接して液化ガスタンク
ｅを支承することによりその浮上を防止してい
た。 The floating prevention device a configured in this way is installed in the ship hold c.
When the liquefied gas tank e starts to float when the tank is flooded, the reinforced plywood block g, which is a floating prevention device a installed on the top f of the liquefied gas tank e, comes into contact with the hull j positioned opposite to the liquefied gas tank By supporting e, its floating was prevented.
［考案が解決しようとする問題点］
ところで、従来の液化ガス運搬船のタンクの浮
上防止装置ａにあつては以下のごとき問題点があ
つた。[Problems to be Solved by the Invention] By the way, the conventional floating prevention device a for a tank of a liquefied gas carrier has the following problems.
液化ガスタンクｅの頂部ｆに浮上防止装置ａで
ある強化合板ブロツクｇが設けられているため強
化合板ブロツクｇ及びこれを固定するブラケツト
ｈの部分を保冷材ｉで覆うことができず、保冷性
能が低下するという問題があつた。 Since a reinforced plywood block g, which is a flotation prevention device a, is provided on the top f of the liquefied gas tank e, the reinforced plywood block g and the bracket h that fixes it cannot be covered with the cold insulation material i, and the cold insulation performance is reduced. There was a problem with the decline.
また、浮上防止装置ａである強化合板ブロツク
ｇの数を増加すると保冷材ｉの数が減少し保冷性
能が低下するため、浮上防止装置ａの数を最小限
にする必要があり、そのため１個当りの荷重が
1000〜2000tonとなり液化ガスタンクｅや船殻の
補強重量が大きくなるという問題があつた。 In addition, if the number of reinforced plywood blocks g, which are floating prevention devices a, is increased, the number of cold insulators i will decrease, and the cold insulation performance will deteriorate. Therefore, it is necessary to minimize the number of floating prevention devices a. The load per
1000 to 2000 tons, which caused the problem that the weight of reinforcing the liquefied gas tank e and the hull would be large.
上述のごとき問題点に鑑みて本考案は液化ガス
タンクの保冷性能が向上できると共に液化ガスタ
ンクや船殻の構造が簡素化できる液化ガス運搬船
のタンクの浮上防止装置を提供することを目的と
するものである。 In view of the above-mentioned problems, the object of the present invention is to provide a device for preventing floating of tanks of liquefied gas carriers, which can improve the cooling performance of liquefied gas tanks and simplify the structure of liquefied gas tanks and hulls. be.
［問題点を解決するための手段］
従来技術における問題点を解決するために本考
案は複数の支持部材が、タンクの頂部と相対向し
て船体部に当該船体部の面に沿つて所定の間隔
で、かつタンクとの相対変位を許容できる間隔を
隔てて設けられ、さらに支持部材の厚さが保冷材
の厚さ以上であるものである。[Means for Solving the Problems] In order to solve the problems in the prior art, the present invention has a plurality of supporting members installed in a predetermined position along the surface of the hull part facing the top of the tank. The support members are provided at intervals that allow for relative displacement with the tank, and the thickness of the support member is greater than the thickness of the cold insulator.
［作用］
上述の如く構成され、上記タンクの浮上防止の
ための支持部材がタンクの頂部と相対向して位置
された船体部に設けられたので、タンク全体が保
冷材によつて覆われることになり、タンクの保冷
性能が著しく向上され、且つこの支持部材がこれ
とタンク頂部との間にタンクと船体との相対変位
を許容できる間隔を隔てて設けられたので、この
相対変位により船体が揺動しても支持部材が保冷
材を損傷させることがなく、更にこの支持部材の
厚さが上記保冷材の厚さ以上に形成されたので、
船倉内浸水時におけるタンクの浮上防止時の保冷
材の損傷が最小限に抑えられるものである。[Function] The tank is configured as described above, and since the support member for preventing the tank from floating is provided in the hull section located opposite to the top of the tank, the entire tank can be covered with the cold insulation material. The cooling performance of the tank was significantly improved, and since this supporting member was provided with a space between it and the top of the tank that allowed for relative displacement between the tank and the hull, this relative displacement caused the hull to move. The supporting member does not damage the cold insulating material even when it swings, and the thickness of the supporting member is greater than the thickness of the cold insulating material.
This minimizes damage to the cold insulation material when preventing the tank from floating when the hold is flooded.
［実施例］
以下に本考案の一実施例を添付図面に従つて詳
述する。[Example] An example of the present invention will be described in detail below with reference to the accompanying drawings.
第１図に示す如く、液化ガス運搬船１の船倉２
内にはその船底部に自立して角型の液化ガスタン
ク３が設けられている。この液化ガスタンク３は
外壁の全体が保冷材４にて覆われている。この保
冷材４にて覆われた液化ガスタンク３の頂部５は
矩形の平面に形成されており、この頂部５と相対
向して位置され船体部６には船倉２内浸水時に液
化ガスタンク３が浮上するのを防止するための浮
上防止装置７が設けられている。具体的には、こ
の浮上防止装置７は例えばデツキトランスの面材
８等に設けられ、第２図に示す如く、液化ガスタ
ンク３の頂部５と相対向する位置にあるデツキト
ランスの面材８の拡幅部９の全てに設けられてい
る。この浮上防止装置７は例えば強化合板ブロツ
ク１０等の支持部材１１にて形成されている。こ
れら支持部材１１は直方体状に形成され、その重
力方向の厚さD1は上記保冷材４の厚さD2以上の
厚さに形成されている。そして、これら支持部材
１１は上記船体部６にブラケツト１２にて固定さ
れている。各々の支持部材１１の下部と保冷材４
に覆われた液化ガスタンク３の頂部５との間には
間隔Ｌが隔てられており、この間隔Ｌは船体の揺
動に伴なう液化ガスタンク３と船体との相対変位
を許容できる間隔になつている。 As shown in Fig. 1, a hold 2 of a liquefied gas carrier 1
Inside, a rectangular liquefied gas tank 3 is provided independently at the bottom of the ship. The entire outer wall of this liquefied gas tank 3 is covered with a cold insulating material 4. The top part 5 of the liquefied gas tank 3 covered with this cold insulation material 4 is formed in a rectangular plane, and is located opposite to this top part 5, and the liquefied gas tank 3 floats on the hull part 6 when the hold 2 is flooded. A floating prevention device 7 is provided to prevent this from happening. Specifically, this flotation prevention device 7 is provided, for example, on the face member 8 of the deck transformer, and as shown in FIG. It is provided in all of the widened portions 9. The floating prevention device 7 is formed of a support member 11 such as a reinforced plywood block 10, for example. These supporting members 11 are formed in the shape of a rectangular parallelepiped, and the thickness D 1 in the direction of gravity is greater than or equal to the thickness D 2 of the cold insulating material 4 . These support members 11 are fixed to the hull section 6 with brackets 12. The lower part of each support member 11 and the cold insulation material 4
A distance L is provided between the top portion 5 of the liquefied gas tank 3 and the top portion 5 of the liquefied gas tank 3, which is covered by the liquefied gas tank. ing.
尚、上記支持部材１１の重力方向の厚さD1は
上記デツキトランスの面材８を重力方向下方に突
出させて形成した場合には、その突出させた分だ
け薄く形成する。 Incidentally, when the support member 11 is formed by protruding the face member 8 of the deck transformer downward in the gravity direction, the thickness D 1 of the support member 11 is made thinner by the amount of the protrusion.
次に以上の如く構成された液化ガス運搬船のタ
ンクの浮上防止装置７の一実施例における作用を
述べる。 Next, the operation of one embodiment of the floating prevention device 7 for a tank of a liquefied gas carrier constructed as described above will be described.
船倉２内浸水時、この船底部に自立していた液
化ガスタンク３は浮上し始める。上記支持部材１
１の下部と保冷材４にて覆われた液化ガスタンク
３の頂部５との間隔Ｌだけ液化ガスタンク３が浮
上すると、液化ガスタンク３は支持部材１１の下
部に当接することになる。その後、浸水量が増加
し液化ガスタンク３が浮上を続けると、支持部材
１１が液化ガスタンク３の頂部５に形成された保
冷材４を圧壊して液化ガスタンク３の頂板に到達
する。これより支持部材１１が上方の船体部６か
ら液化ガスタンク３を支承することになり、液化
ガスタンク３の浮上が止まることになる。この
時、液化ガスタンク３の頂部５に位置された保冷
材４が破壊されるが、船倉２内浸水という非常事
態発生時なので、保冷材４の破壊程度は問題では
ない。しかも、船倉２内浸水というトラブルの発
生確率自体が非常に小さい。 When the hold 2 is flooded, the liquefied gas tank 3, which was independent on the bottom of the ship, begins to float to the surface. The support member 1
When the liquefied gas tank 3 floats up by a distance L between the lower part of the liquefied gas tank 1 and the top 5 of the liquefied gas tank 3 covered with the cold insulating material 4, the liquefied gas tank 3 comes into contact with the lower part of the support member 11. Thereafter, as the amount of water intrusion increases and the liquefied gas tank 3 continues to float, the support member 11 crushes the cold insulating material 4 formed on the top 5 of the liquefied gas tank 3 and reaches the top plate of the liquefied gas tank 3. As a result, the support member 11 supports the liquefied gas tank 3 from the upper hull portion 6, and the floating of the liquefied gas tank 3 is stopped. At this time, the cold insulating material 4 located at the top 5 of the liquefied gas tank 3 is destroyed, but since this is an emergency situation in which the cargo hold 2 is flooded, the degree of destruction of the cold insulating material 4 is not a problem. Moreover, the probability of occurrence of trouble such as flooding inside the hold 2 is extremely small.
このように液化ガスタンク３の浮上防止装置７
である支持部材１１を液化ガスタンク３の頂部５
ではなく、この液化ガスタンク３の頂部５と相対
向して位置された船体部６に設けたので、液化ガ
スタンク３の外壁の全体が保冷材４にて覆われる
ことになり、液化ガスタンク３の保冷性能が著し
く向上することになる。しかも、上記実施例の如
く、液化ガスタンク３の頂部と相対向する位置に
あるデツキトランスの面材８の拡幅部９の全てに
設けるようにして配置する支持部材１１の数を増
加させることができる。これは支持部材１１の数
を増加しても液化ガスタンク３の保冷材４の数を
減少させることなく、液化ガスタンク３の保冷性
能に影響を与えないためである。このように配置
する支持部材１１の数を増加させることにより支
持部材１個当りの荷重を減少することができ、船
殻や液化ガスタンク３の局部補強が軽減されこれ
らの構造が簡素化されるものである。 In this way, the floating prevention device 7 of the liquefied gas tank 3
The supporting member 11 is attached to the top 5 of the liquefied gas tank 3.
Instead, it is provided in the hull part 6 located opposite to the top 5 of the liquefied gas tank 3, so the entire outer wall of the liquefied gas tank 3 is covered with the cold insulation material 4, and the cold insulation of the liquefied gas tank 3 is Performance will be significantly improved. Moreover, as in the above embodiment, it is possible to increase the number of support members 11 disposed on all of the widened portions 9 of the face material 8 of the deck transformer located at positions facing the top of the liquefied gas tank 3. . This is because even if the number of support members 11 is increased, the number of cold insulators 4 in the liquefied gas tank 3 will not be reduced and the cold insulation performance of the liquefied gas tank 3 will not be affected. By increasing the number of support members 11 arranged in this way, the load per support member can be reduced, the local reinforcement of the hull and liquefied gas tank 3 is reduced, and the structure of these is simplified. It is.
［考案の効果］
以上要するに本考案によれば次のごとき優れた
効果を発揮する。[Effects of the invention] In summary, the present invention provides the following excellent effects.
(1) タンク浮上防止のための支持部材をタンクの
頂部と相対向して位置された船体部に設けたの
で、支持部材１１による液化ガスタンク３への
吸熱が無く、支持部材をタンク側に固定する従
来のタンクの浮上防止装置に比べてタンクの保
冷性能を著しく向上することができる。(1) Since the support member for preventing the tank from floating is provided on the hull part located opposite to the top of the tank, there is no heat absorption into the liquefied gas tank 3 by the support member 11, and the support member is fixed to the tank side. The cooling performance of the tank can be significantly improved compared to conventional tank flotation prevention devices.
(2) (1)１項の如く構成されたので、配置する支持
部材の数を増加しても保冷材の数を減少させる
ことなくタンクの保冷性能に影響を与えないの
で、配置する数を増加させることにより、支持
部材１個当りの荷重を減少することができ、船
殻や液化ガスタンクの局部補強を軽減すること
ができ、これらの構造を簡素化することができ
る。(2) Since it is configured as in paragraph (1) 1, even if the number of support members to be placed is increased, the number of cold insulation materials will not be decreased and the cold insulation performance of the tank will not be affected. By increasing the number, the load per supporting member can be reduced, the need for local reinforcement of the hull and liquefied gas tank can be reduced, and the structures of these can be simplified.
(3) 複数の支持部材１１が船体に、この船体の面
に沿つて所定の間隔で設けられているので、船
体の浸水時に、液化ガスタンク３が浮上して支
持部材１１に衝突することにより破壊される保
冷材４の体積が最小限度ですむ。(3) Since a plurality of supporting members 11 are provided on the hull at predetermined intervals along the surface of the hull, when the hull is submerged in water, the liquefied gas tank 3 floats up and collides with the supporting members 11, causing destruction. The volume of the cold insulating material 4 to be stored can be kept to a minimum.
第１図は本考案の液化ガス運搬船のタンクの浮
上防止装置の一実施例を示す要部側断面図、第２
図は第１図の−線矢視図、第３図は従来の液
化ガス運搬船のタンクの浮上防止装置を示す要部
側断面図、第４図は第３図の−線矢視図、第
５図は第３図のＡ部の拡大図である。
図中、１は液化ガス運搬船、２は船倉、３は液
化ガスタンク、４は保冷材、５は頂部、６は船体
部、７は浮上防止装置、１１は支持部材、D1は
支持部材の厚さ、D2は保冷材の厚さ、Ｌは支持
部材の下部と液化ガスタンクの頂部との間隔であ
る。
Fig. 1 is a side sectional view of the main part showing an embodiment of the floating prevention device for a tank of a liquefied gas carrier according to the present invention;
The figures are a view taken along the - line in Fig. 1, Fig. 3 is a side cross-sectional view of a main part showing a floating prevention device for a tank of a conventional liquefied gas carrier, and Fig. 4 is a view taken along the - line in Fig. 3. FIG. 5 is an enlarged view of section A in FIG. In the figure, 1 is a liquefied gas carrier, 2 is a hold, 3 is a liquefied gas tank, 4 is a cold insulator, 5 is a top, 6 is a hull, 7 is a flotation prevention device, 11 is a support member, and D 1 is the thickness of the support member. , D 2 is the thickness of the cold insulator, and L is the distance between the bottom of the support member and the top of the liquefied gas tank.
Claims (1)
保冷材により覆われた液化ガスタンクが船倉内浸
水時に浮上するのを防止するためのタンクの浮上
防止装置において、複数の支持部材が、前記タン
クの頂部と相対向して船体部に該船体部の面に沿
つて所定の間隔で、かつ前記タンクとの相対変位
を許容できる間隔を隔てて設けられ、さらに前記
支持部材の厚さが前記保冷材の厚さ以上であるこ
とを特徴とする液化ガス運搬船のタンクの浮上防
止装置。 In a tank flotation prevention device for preventing a liquefied gas tank, which is provided independently at the bottom of a ship inside a ship hold and whose outer wall is covered with a cold insulation material, from surfacing when the hold is flooded, a plurality of support members are connected to the tank. The supporting member is provided on the hull at a predetermined interval along the surface of the hull, facing the top of the tank, and at a distance that allows relative displacement with the tank; A surfacing prevention device for a tank of a liquefied gas carrier, characterized in that the thickness is greater than the thickness of the material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986125300U JPH0442233Y2 (en) | 1986-08-18 | 1986-08-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986125300U JPH0442233Y2 (en) | 1986-08-18 | 1986-08-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6332097U JPS6332097U (en) | 1988-03-01 |
| JPH0442233Y2 true JPH0442233Y2 (en) | 1992-10-05 |
Family
ID=31018078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986125300U Expired JPH0442233Y2 (en) | 1986-08-18 | 1986-08-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0442233Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6117267A (en) * | 1984-07-04 | 1986-01-25 | Nec Corp | Flexible magnetic disk device |
| JPS6124693A (en) * | 1984-07-12 | 1986-02-03 | Mitsubishi Heavy Ind Ltd | Preventive device against floating of independent tank in hold |
-
1986
- 1986-08-18 JP JP1986125300U patent/JPH0442233Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6117267A (en) * | 1984-07-04 | 1986-01-25 | Nec Corp | Flexible magnetic disk device |
| JPS6124693A (en) * | 1984-07-12 | 1986-02-03 | Mitsubishi Heavy Ind Ltd | Preventive device against floating of independent tank in hold |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6332097U (en) | 1988-03-01 |
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