JP2006071034A - Tank skirt - Google Patents

Tank skirt Download PDF

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JP2006071034A
JP2006071034A JP2004256775A JP2004256775A JP2006071034A JP 2006071034 A JP2006071034 A JP 2006071034A JP 2004256775 A JP2004256775 A JP 2004256775A JP 2004256775 A JP2004256775 A JP 2004256775A JP 2006071034 A JP2006071034 A JP 2006071034A
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tank
scallop
side structural
dissimilar
hull
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JP4592362B2 (en
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Shinichi Tomonaga
信一 朝長
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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a tank skirt capable of dispensing with revision work of scallop formed in a lower end part of a structural member on a tank side and shortening work hours greatly. <P>SOLUTION: This tank skirt is provided between a base and a tank for storing liquid or gas at low temperature and fixes and supports the tank on the base. This tank skirt is provided with the structural member 4 on the tank side fixed to the tank, a structural member 5 on a base side fixed to the base made of a material different from that of the structural member 4 on the tank side, and a different material joint 6 for structure for joining these structural members 4, 5. Width of scallop 4s formed at a lower end of the structural member 4 on the tank side is larger than width of scallop 5s formed at an upper end of the structural member 5 on the base side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、液化天然ガス（Liquefied Natural Gas）を貯蔵する球形タンクを基台に対して固定支持させるタンクスカートに関するものである。   The present invention relates to a tank skirt for fixedly supporting a spherical tank for storing liquefied natural gas with respect to a base.

低温にて液化された天然ガスを貯蔵する球形タンクとしては、例えば、ＬＮＧ船に搭載されるものが知られている。ＬＮＧ船に搭載される球形タンクを船体（基台）に固定支持させるタンクスカートとしては、球形タンクと同じアルミニウム合金材で形成されたタンク側構造材と、船体側に配置されるとともに、ステンレス鋼材で形成された船体側構造材と、これら構造材を連結する構造用異材継手とを具備したものが知られている（たとえば、特許文献１参照）。
特開２００４−７４８７０号公報（図８，図９（ａ）） As a spherical tank for storing natural gas liquefied at a low temperature, for example, a tank mounted on an LNG ship is known. As a tank skirt that fixes and supports the spherical tank mounted on the LNG ship to the hull (base), the tank side structural material made of the same aluminum alloy material as the spherical tank, and the stainless steel material are arranged on the hull side. A hull-side structural material formed in (1) and a structural dissimilar joint for connecting these structural materials are known (for example, see Patent Document 1).
JP 2004-74870 A (FIGS. 8 and 9A)

上記特許文献に記載されているように、アルミニウム合金材で形成されたタンク側構造材５４と、ステンレス鋼材で形成された船体側構造材５５とは、その融点が異なる（アルミニウムは約６２０〜６６０℃、ステンレス鋼は約１４００〜１５００℃）ことから、溶接では接合することができず、例えば、爆着接合により一体化されている。
この爆着接合は、まず、船体側構造材５５の上端に隅肉溶接にて固着された、船体側構造材５５と同じステンレス鋼材で形成された船体側異材５７ｂの上にニッケル５９を配置し、この状態で火薬を爆発させてニッケル５９を船体側異材５７ｂに衝突させ、その衝撃力で新生界面を露出させると同時に加圧させることにより、ニッケル５９と船体側異材５７ｂを接合する。次に、ニッケル５９の上にチタン５８を配置し、同様に火薬を爆発させてニッケル５９の上にチタン５８を接合する。更に、チタン５８の上にタンク側構造材５４と同じアルミニウム合金材で形成で形成されたタンク側異材５７ａを配置し、同様に火薬を爆発させてチタン５８の上にタンク側異材５７ａを接合する。そして、タンク側異材５７ａの上にタンク側構造材５４を配置し、タンク側異材５７ａとタンク側構造材５４の下端とを隅肉溶接にて固着させる。このように爆着接合では３回の爆着により構造用異材継手（「クラッド鋼」または「STJ：Structual Transition Joint」ともいう）５６を製作している。 As described in the above patent document, the tank side structural material 54 formed of an aluminum alloy material and the hull side structural material 55 formed of a stainless steel material have different melting points (aluminum is about 620 to 660). Since the temperature is about 1400 to 1500 ° C. for stainless steel, it cannot be joined by welding. For example, it is integrated by explosive joining.
In this explosive bonding, first, nickel 59 is disposed on a hull-side dissimilar material 57b formed of the same stainless steel material as the hull-side structural material 55, which is fixed to the upper end of the hull-side structural material 55 by fillet welding. In this state, the explosives are exploded to cause the nickel 59 to collide with the hull-side dissimilar material 57b, and the new interface is exposed and pressurized at the same time by the impact force, thereby joining the nickel 59 and the hull-side dissimilar material 57b. Next, titanium 58 is disposed on the nickel 59, and the explosive is similarly exploded to bond the titanium 58 onto the nickel 59. Further, a tank-side dissimilar material 57a formed of the same aluminum alloy material as the tank-side structural member 54 is disposed on the titanium 58, and the explosives are similarly exploded to join the tank-side dissimilar material 57a on the titanium 58. . And the tank side structural material 54 is arrange | positioned on the tank side different material 57a, and the tank side different material 57a and the lower end of the tank side structural material 54 are fixed by fillet welding. As described above, in the explosive bonding, a structural dissimilar joint (also referred to as “clad steel” or “STJ: Structural Transition Joint”) 56 is manufactured by three explosive bondings.

しかしながら、図３に示すように、タンク側異材５７ａの上にタンク側構造材５４を配置した際、タンク側構造材５４の工作誤差や搭載誤差により、タンク側構造材５４の下端部に形成されたスカラップ５４ｓと、船体側構造材５５の上端部に形成された、スカラップ５４ｓと同じ形状を有するスカラップ５５ｓとに目違いが発生してしまうことがある。
構造用異材継手５６の端面５６ｅは、溶接時の熱により端面割れを生じるおそれがある（爆着して一体化された船体側異材５７ｂ、ニッケル５９、チタン５８、およびタンク側異材５７ａが、熱応力により分離してしまうおそれがある）ため、構造用異材継手５６の端面５６ｅと、溶接部（タンク側異材５７ａとタンク側構造材５４の下端とを接合する溶接部）とを少なくとも所定距離（例えば、３０ｍｍ）離間させる必要がある。
また、このような目違いによりタンク側構造材５４の下端部に形成されたスカラップ５４ｓが、船体側構造材５５の上端部に形成されたスカラップ５５ｓに対してオーバーハングすると、上方からのタンク荷重により構造用異材継手５６の端部（図において右側の端部）に剪断力が作用し、構造用異材継手５６の端部が変形してしまうおそれがある。
したがって、図３に示すような目違いが発生し、構造用異材継手５６の端面５６ｅと、溶接部との間を所定距離離間させることができない場合には、図４に符号Ｈで示す部分をグラインダ等により一つずつ手切り補正を行い、構造用異材継手５６の端面５６ｅと、溶接部との間を所定距離離間させるようにした後、タンク側異材５７ａとタンク側構造材５４の下端とを隅肉溶接にて固着させるようにしていた。なお、図３および図４において符号Ｗ２は、船体側異材５７ｂと船体側構造材５５の上端とを隅肉溶接してできた溶接部である。
このように、従来の方法では、目違いが発生した場合、タンク側構造材５４の下端部に形成されたスカラップ５４ｓを一つずつ手作業により加工しなければならず、膨大な作業工程が必要となって、作業時間が膨大になってしまうといった問題点があった。 However, as shown in FIG. 3, when the tank-side structural material 54 is disposed on the tank-side dissimilar material 57a, it is formed at the lower end of the tank-side structural material 54 due to work errors and mounting errors of the tank-side structural material 54. The scallop 54s and the scallop 55s formed at the upper end portion of the hull-side structural member 55 and having the same shape as the scallop 54s may be mistaken.
The end face 56e of the structural dissimilar material joint 56 may be cracked by heat during welding (the hull-side dissimilar material 57b, nickel 59, titanium 58, and the tank-side dissimilar material 57a which are integrated by explosion are heated. Therefore, the end surface 56e of the structural dissimilar material joint 56 and the welded portion (the welded portion joining the tank-side dissimilar material 57a and the lower end of the tank-side structural material 54) are at least a predetermined distance ( For example, 30 mm) needs to be separated.
Further, if the scallop 54s formed at the lower end portion of the tank-side structural member 54 overhangs with respect to the scallop 55s formed at the upper end portion of the hull-side structural member 55 due to such a mistake, the tank load from above is applied. As a result, a shearing force acts on the end of the structural dissimilar material joint 56 (the right end in the figure), and the end of the structural dissimilar material joint 56 may be deformed.
Therefore, when the misunderstanding as shown in FIG. 3 occurs and the end surface 56e of the structural dissimilar material joint 56 cannot be separated from the welded portion by a predetermined distance, the portion indicated by the symbol H in FIG. After performing manual cutting correction one by one with a grinder or the like and separating the end surface 56e of the structural dissimilar material joint 56 and the welded portion by a predetermined distance, the tank-side dissimilar material 57a and the lower end of the tank-side structural material 54 Was fixed by fillet welding. 3 and 4, reference symbol W <b> 2 is a welded portion formed by fillet welding the hull-side dissimilar material 57 b and the upper end of the hull-side structural material 55.
As described above, in the conventional method, when a mistake occurs, the scallops 54s formed on the lower end portion of the tank-side structural member 54 must be manually processed one by one, which requires a large number of work steps. As a result, there is a problem that the work time becomes enormous.

本発明は、上記の事情に鑑みてなされたもので、タンク側構造材の下端部に形成されたスカラップの補正作業を省略することができ、かつ作業時間を大幅に短縮することができるタンクスカートを提供することを目的とする。   The present invention has been made in view of the above circumstances, and a tank skirt capable of omitting the correction work of the scallop formed at the lower end portion of the tank-side structural member and greatly shortening the work time. The purpose is to provide.

本発明は、上記課題を解決するため、以下の手段を採用した。
請求項１に記載のタンクスカートは、基台と、低温の液体または気体が貯蔵されるタンクとの間に設けられ、かつ前記タンクを前記基台に対して固定支持させるタンクスカートであって、前記タンクに固定されたタンク側構造材と、該タンク側構造材と材質が異なる前記基台に固定された基台側構造材と、これら構造材を接合する構造用異材継手とを具備し、前記タンク側構造材の下端に形成されたスカラップの幅が、前記基台側構造材の上端に形成されたスカラップの幅よりも大きいことを特徴とする。
このようなタンクスカートによれば、タンク側構造材の下端部に設けられたスカラップの幅が、基台側構造材の上端部に設けられたスカラップの幅よりも広くなるように、タンク側構造材の下端部に設けられるスカラップの形状が設定されている。
したがって、例えば、タンク側構造材と、このタンク側構造材と同じ材質からなる構造用異材継手のタンク側異材とを溶接により接合する場合に、構造用異材継手の端面と溶接部とを所定距離（例えば、３０ｍｍ）離間させることができるので、構造用異材継手が爆着により接合されたものであっても構造用異材継手の端面割れを防止することができる。
これにより、構造用異材継手の端面割れを防止することができるので、従来行われていたスカラップの補正作業を省略することができて、作業工程を大幅に減らすことができるとともに、作業時間を大幅に減少させることができる。
また、タンク側構造材の下端部に形成されたスカラップが、船体側構造材の上端部に形成されたスカラップに対してオーバーハングすることがなくなるので、上方からのタンク荷重により構造用異材継手の端部に剪断力が作用することを防止することができて、構造用異材継手の端部が変形してしまうことを防止することができる。 The present invention employs the following means in order to solve the above problems.
The tank skirt according to claim 1, wherein the tank skirt is provided between a base and a tank in which a low-temperature liquid or gas is stored, and the tank skirt is fixedly supported to the base. A tank-side structural material fixed to the tank, a base-side structural material fixed to the base different in material from the tank-side structural material, and a structural dissimilar joint for joining these structural materials, The width of the scallop formed at the lower end of the tank side structural member is larger than the width of the scallop formed at the upper end of the base side structural member.
According to such a tank skirt, the tank side structure is configured such that the width of the scallop provided at the lower end portion of the tank side structural material is wider than the width of the scallop provided at the upper end portion of the base side structural material. The shape of the scallop provided at the lower end of the material is set.
Therefore, for example, when joining the tank-side structural material and the tank-side dissimilar material of the structural dissimilar joint made of the same material as the tank-side structural material by welding, the end surface of the structural dissimilar material joint and the welded portion are connected at a predetermined distance. Since they can be separated (for example, 30 mm), even if the structural dissimilar joint is joined by explosion, it is possible to prevent the end face crack of the structural dissimilar joint.
As a result, it is possible to prevent cracking of the end face of the dissimilar material joint for structure, so that the scallop correction work that has been performed in the past can be omitted, the work process can be greatly reduced, and the work time can be greatly increased. Can be reduced.
In addition, since the scallop formed at the lower end of the tank side structural material does not overhang with the scallop formed at the upper end of the hull side structural material, the structural dissimilar joint of the structural joint is caused by the tank load from above. It can prevent that a shearing force acts on an edge part, and can prevent that the edge part of a dissimilar material joint for structure deform | transforms.

請求項２に記載のタンクスカートは、前記タンク側構造材の下端に形成されたスカラップの幅が、前記基台側構造材の上端に形成されたスカラップ幅よりも２０ｍｍ大きいことを特徴とする。
このようなタンクスカートによれば、タンク側構造材の下端部に設けられたスカラップの幅が、基台側構造材の上端部に設けられたスカラップの幅よりも２０ｍｍ広くなるように、タンク側構造材の下端部に設けられるスカラップの形状が設定されている。
すなわち、構造用異材継手の上にタンク側構造材を配置する際に生じる、最も悪い搭載誤差が考慮されているので、例えば、タンク側構造材と、このタンク側構造材と同じ材質からなる構造用異材継手のタンク側異材とを溶接により接合する場合に、構造用異材継手の端面と溶接部とを確実に所定距離（例えば、３０ｍｍ）離間させることができるので、構造用異材継手が爆着により接合されたものであっても構造用異材継手の端面割れを確実に防止することができる。 The tank skirt according to claim 2 is characterized in that the width of the scallop formed at the lower end of the tank side structural member is 20 mm larger than the width of the scallop formed at the upper end of the base side structural member.
According to such a tank skirt, the width of the scallop provided at the lower end of the tank side structural member is 20 mm wider than the width of the scallop provided at the upper end of the base side structural member. The shape of the scallop provided at the lower end of the structural material is set.
That is, since the worst mounting error that occurs when placing the tank-side structural material on the structural dissimilar joint is considered, for example, the tank-side structural material and the structure made of the same material as this tank-side structural material When joining the dissimilar material joint on the tank side by welding, the end face of the dissimilar material joint and the welded portion can be reliably separated by a predetermined distance (for example, 30 mm). Even if they are joined together, it is possible to reliably prevent cracking of the end face of the dissimilar joint for structure.

請求項３に記載のＬＮＧ船は、請求項１または２に記載のタンクスカートを具備してなることを特徴とする。
このようなＬＮＧ船によれば、タンク側構造材の下端部に形成されたスカラップの補正作業を省略することができ、かつ作業時間を大幅に短縮することのできるタンクスカートを具備しているので、ＬＮＧ船を建造するのに要する作業時間が大幅に減少されることとなる。 The LNG ship according to claim 3 is provided with the tank skirt according to claim 1 or 2.
Such an LNG ship has a tank skirt that can omit the correction work of the scallop formed at the lower end of the tank-side structural material and can greatly reduce the work time. The working time required to build the LNG ship will be greatly reduced.

請求項４に記載の陸上設置型ＬＮＧタンクは、請求項１または２に記載のタンクスカートを具備してなることを特徴とする。
このような陸上設置型ＬＮＧタンクによれば、タンク側構造材の下端部に形成されたスカラップの補正作業を省略することができ、かつ作業時間を大幅に短縮することのできるタンクスカートを具備しているので、陸上設置型ＬＮＧタンクを建設するのに要する作業時間が大幅に減少されることとなる。 A land-mounted LNG tank according to claim 4 is provided with the tank skirt according to claim 1 or 2.
Such a land-mounted LNG tank has a tank skirt that can omit the correction work of the scallop formed at the lower end of the tank-side structural member and can greatly reduce the work time. Therefore, the work time required to construct a land-mounted LNG tank is greatly reduced.

本発明によれば、タンク側構造材の下端部に形成されたスカラップの補正作業を省略することができ、かつ作業時間を大幅に短縮することができるという効果を奏する。   ADVANTAGE OF THE INVENTION According to this invention, there exists an effect that the correction | amendment work of the scallop formed in the lower end part of a tank side structural material can be abbreviate | omitted, and work time can be shortened significantly.

以下、図面を参照して本発明によるタンクスカートの一実施形態を、ＬＮＧ船に適用した例を説明する。
図２は本実施形態に係るタンクスカート２を具備したＬＮＧ船１の概略全体斜視図である。
図２に示すように、ＬＮＧ船１は、例えば、四個のアルミニウム製の球形タンク３を備えた船舶であり、これらアルミニウム製の球形タンク３はそれぞれ、その内部に、低温にて液化された天然ガスを貯蔵することができるように構成されたものである。
また、これら球形タンク３は、それぞれタンクスカート２を介して船体１ａに固定されている。 Hereinafter, an example in which an embodiment of a tank skirt according to the present invention is applied to an LNG ship will be described with reference to the drawings.
FIG. 2 is a schematic overall perspective view of the LNG ship 1 having the tank skirt 2 according to the present embodiment.
As shown in FIG. 2, the LNG ship 1 is a ship provided with, for example, four aluminum spherical tanks 3, and each of these aluminum spherical tanks 3 is liquefied at a low temperature therein. It is configured to be able to store natural gas.
The spherical tanks 3 are fixed to the hull 1a via tank skirts 2, respectively.

タンクスカート２は、タンク側構造材４と、船体側構造材５と、これら構造材４，５を連結する構造用異材継手６とを主たる要素として構成されたものである。
タンク側構造材４は、球形タンク３と同じアルミニウム合金材で形成されているとともに、その上端が球形タンク３の赤道部に溶接にて固着された中空円筒形の部材である。
タンク側構造材４の下端部には、所定間隔（例えば、約２．４ｍ）毎にスカラップ４ｓが形成されている。
スカラップ４ｓの幅（図１において左右方向の長さ、すなわち、側面間の距離）は約２２０ｍｍ、スカラップ４ｓの高さ（図１において上下方向の長さ、すなわち、タンク側異材７ａの上面に平行な部分からタンク側異材７ａの上面までの最短距離）は約１００ｍｍである。 The tank skirt 2 is composed mainly of a tank-side structural member 4, a hull-side structural member 5, and a structural dissimilar joint 6 that connects these structural members 4 and 5.
The tank-side structural member 4 is a hollow cylindrical member that is formed of the same aluminum alloy material as the spherical tank 3 and whose upper end is fixed to the equator of the spherical tank 3 by welding.
A scallop 4s is formed at a predetermined interval (for example, about 2.4 m) at the lower end of the tank-side structural member 4.
The width of the scallop 4s (the length in the horizontal direction in FIG. 1, ie, the distance between the side surfaces) is about 220 mm, and the height of the scallop 4s (the length in the vertical direction in FIG. 1, ie, parallel to the upper surface of the tank-side dissimilar material 7a. The shortest distance from the upper part to the upper surface of the tank-side dissimilar material 7a) is about 100 mm.

船体側構造材５は、ステンレス鋼材で形成されているとともに、その下端が船体１ａ側の鋼製基台（図示せず）に溶接にて固着された、タンク側構造材４と略同じ形状を有する中空円筒形の部材である。
船体側構造材５の上端部には、所定間隔（例えば、約２．４ｍ）毎にスカラップ５ｓが形成されている。
スカラップ５ｓの幅（図１において左右方向の長さ、すなわち、側面間の距離）は従来と同様の約２００ｍｍ、スカラップ５ｓの高さ（図１において上下方向の長さ、すなわち、船体側異材７ｂの下面に平行な部分から船体側異材７ｂの下面までの最短距離）は約１００ｍｍである。
このように、タンク側構造材４の下端部に設けられたスカラップ４ｓの幅は、船体側構造材５の上端部に設けられたスカラップ５ｓの幅よりも、約２０ｍｍ大きい。 The hull-side structural material 5 is formed of stainless steel, and has a substantially the same shape as the tank-side structural material 4 whose lower end is fixed to a steel base (not shown) on the hull 1a side by welding. It is a hollow cylindrical member.
Scallops 5 s are formed on the upper end portion of the hull-side structural member 5 at predetermined intervals (for example, about 2.4 m).
The width of the scallop 5s (the length in the left-right direction in FIG. 1, that is, the distance between the side surfaces) is about 200 mm as in the conventional case, and the height of the scallop 5s (the length in the vertical direction in FIG. The shortest distance from the portion parallel to the lower surface of the hull to the lower surface of the hull-side dissimilar material 7b) is about 100 mm.
Thus, the width of the scallop 4s provided at the lower end of the tank side structural member 4 is approximately 20 mm larger than the width of the scallop 5s provided at the upper end of the hull side structural member 5.

図１に示すように、構造用異材継手６は、周方向に、例えば、４８分割（一本あたり約２．４ｍ）されたフランジ状の部材で、船体側異材７ｂと、ニッケル９と、チタン８と、タンク側異材７ａとを爆着により接合したものである。
すなわち、構造用異材継手６はつぎのようにして製作される。まず、船体側構造材５の上端に隅肉溶接にて固着されるとともに、船体側構造材５と同じステンレス鋼材で形成された船体側異材７ｂの上にニッケル９を配置し、この状態で火薬を爆発させてニッケル９を船体側異材７ｂに衝突させ、その衝撃力で新生界面を露出させると同時に加圧させることにより、ニッケル９と船体側異材７ｂを接合する。次に、ニッケル９の上にチタン８を配置し、同様に火薬を爆発させてニッケル９の上にチタン８を接合する。更に、チタン８の上にタンク側構造材４と同じアルミニウム合金材で形成で形成されたタンク側異材７ａを配置し、同様に火薬を爆発させてチタン８の上にタンク側異材７ａを接合する。そして、タンク側異材７ａの上にタンク側構造材４を配置し、タンク側異材７ａとタンク側構造材４の下端とを隅肉溶接にて固着させる。なお、図１において符号Ｗ１およびＷ２は、タンク側異材７ａとタンク側構造材４の下端とを隅肉溶接してできた溶接部、および船体側異材７ｂと船体側構造材５の上端とを隅肉溶接してできた溶接部である。 As shown in FIG. 1, the dissimilar joint for structure 6 is a flange-shaped member divided into 48 parts (about 2.4 m per piece) in the circumferential direction, for example, a hull-side dissimilar material 7b, nickel 9, titanium 8 and the tank-side dissimilar material 7a are joined by explosion bonding.
That is, the structural dissimilar material joint 6 is manufactured as follows. First, nickel 9 is disposed on the hull-side dissimilar material 7b formed of the same stainless steel material as the hull-side structural material 5 while being fixed to the upper end of the hull-side structural material 5 by fillet welding. The nickel 9 is made to collide with the hull-side dissimilar material 7b, and the new interface is exposed and pressurized at the same time by the impact force to join the nickel 9 and the hull-side dissimilar material 7b. Next, the titanium 8 is disposed on the nickel 9, and the explosive is similarly exploded to join the titanium 8 on the nickel 9. Further, a tank-side dissimilar material 7a formed of the same aluminum alloy material as the tank-side structural material 4 is disposed on the titanium 8, and the explosive is explode in the same manner to join the tank-side dissimilar material 7a on the titanium 8. . And the tank side structural material 4 is arrange | positioned on the tank side different material 7a, and the tank side different material 7a and the lower end of the tank side structural material 4 are fixed by fillet welding. In FIG. 1, reference symbols W1 and W2 denote a welded portion formed by fillet welding the tank-side dissimilar material 7a and the lower end of the tank-side structural member 4, and the hull-side dissimilar material 7b and the upper end of the hull-side structural member 5, respectively. This is a weld made by fillet welding.

また、図１（タンク側構造材４のスカラップ４ｓが、船体側構造材５のスカラップ５ｓの真上に位置している状態、すなわち、スカラップ４ｓが、タンク側異材７ａ上の最適な位置に存する状態を示す図）において、構造用異材継手６の端面６ｅからスカラップ４ｓの一側面（端面６ｅと対応する側の側面）までの距離は約４８ｍｍ、構造用異材継手６の端面６ｅからスカラップ５ｓの一側面（端面６ｅと対応する側の側面）までの距離は約３８ｍｍ、構造用異材継手６の端面６ｅから溶接部Ｗ２のエッジまでの距離は約２６ｍｍ（したがって、溶接部Ｗ２の幅は約１２ｍｍとなる）、端面６ｅ間の距離（一つの端面６ｅと、この端面６ｅと対向する端面６ｅとの間の距離）は約１２４ｍｍとなっている。   FIG. 1 (the scallop 4s of the tank-side structural material 4 is located immediately above the scallop 5s of the hull-side structural material 5, that is, the scallop 4s is in an optimal position on the tank-side dissimilar material 7a. In the figure), the distance from the end surface 6e of the structural dissimilar joint 6 to one side surface (the side surface corresponding to the end surface 6e) of the scallop 4s is about 48 mm, and from the end surface 6e of the structural dissimilar material joint 6 to the scallop 5s. The distance to one side surface (the side surface corresponding to the end surface 6e) is about 38 mm, and the distance from the end surface 6e of the structural dissimilar joint 6 to the edge of the weld W2 is about 26 mm (therefore, the width of the weld W2 is about 12 mm). The distance between the end faces 6e (the distance between one end face 6e and the end face 6e facing this end face 6e) is about 124 mm.

以上説明したように、タンク側構造材４の下端部に設けられたスカラップ４ｓの幅が、船体側構造材５の上端部に設けられたスカラップ５ｓの幅よりも広くなるように、タンク側構造材４の下端部に設けられるスカラップ４ｓの形状が設定されているので、タンク側異材７ａの上にタンク側構造材４を配置した際、構造用異材継手６の端面６ｅと、溶接部Ｗ１とを少なくとも所定距離（例えば、３０ｍｍ）離間させることができる。
これにより、構造用異材継手６の端面割れを防止することができるので、従来行われていたスカラップの補正作業を省略することができて、作業工程を大幅に減らすことができるとともに、作業時間を大幅に減少させることができる。
また、タンク側構造材４の下端部に形成されたスカラップ４ｓが、船体側構造材５の上端部に形成されたスカラップ５ｓに対してオーバーハングすることがなくなるので、上方からのタンク荷重により構造用異材継手６の端部に剪断力が作用することを防止することができて、構造用異材継手６の端部が変形してしまうことを防止することができる。
さらに、タンク側構造材４の下端部に設けられたスカラップ４ｓの幅が、船体側構造材５の上端部に設けられたスカラップ５ｓの幅よりも、２０ｍｍ広くなるように形成されているので、すべての箇所において構造用異材継手６の端面６ｅと溶接部とを確実に所定距離（例えば、３０ｍｍ）以上離間させることができるとともに、タンク側構造材４の下端部に形成されたスカラップ４ｓが、船体側構造材５の上端部に形成されたスカラップ５ｓに対してオーバーハングすることを確実に防止することができる。 As described above, the tank-side structure is configured so that the width of the scallop 4s provided at the lower end portion of the tank-side structural material 4 is wider than the width of the scallop 5s provided at the upper end portion of the hull-side structural material 5. Since the shape of the scallop 4s provided at the lower end of the material 4 is set, when the tank-side structural material 4 is disposed on the tank-side dissimilar material 7a, the end surface 6e of the structural dissimilar material joint 6 and the welded portion W1 Can be separated by at least a predetermined distance (for example, 30 mm).
Thereby, since the end surface crack of the dissimilar material joint 6 for structure can be prevented, the correction | amendment operation | work currently performed conventionally can be abbreviate | omitted, and while a work process can be reduced significantly, work time can be reduced. It can be greatly reduced.
Further, the scallop 4s formed at the lower end portion of the tank-side structural member 4 does not overhang with respect to the scallop 5s formed at the upper end portion of the hull-side structural member 5, so that the structure is caused by the tank load from above. It can prevent that a shearing force acts on the edge part of the dissimilar material joint 6 for structures, and can prevent that the edge part of the dissimilar material joint 6 for structures deform | transforms.
Furthermore, since the width of the scallop 4s provided at the lower end portion of the tank side structural material 4 is formed to be 20 mm wider than the width of the scallop 5s provided at the upper end portion of the hull side structural material 5, The end surface 6e of the structural dissimilar material joint 6 and the welded portion can be reliably separated from each other by a predetermined distance (for example, 30 mm) at all locations, and the scallop 4s formed on the lower end portion of the tank-side structural material 4 It is possible to reliably prevent overhanging with respect to the scallop 5s formed at the upper end of the hull-side structural member 5.

なお、本発明は上述したようなＬＮＧ船１にのみ適用され得るものではなく、陸上に設置される陸上設置型ＬＮＧタンク等にも適用することができる。   The present invention can be applied not only to the LNG ship 1 as described above but also to a land-installed LNG tank or the like installed on land.

また、タンク側構造材４と船体側構造材５とを連結する構造用異材継手６は、上述した実施形態のものに限定されるものではなく、摩擦接合や、真空状態下で行う圧延接合等により接合されるものを適用することもできる。   The structural dissimilar joint 6 for connecting the tank-side structural member 4 and the hull-side structural member 5 is not limited to that of the above-described embodiment, but friction welding, rolling joining performed in a vacuum state, or the like. It is also possible to apply those joined by the above.

本発明によるタンクスカートの一実施形態を示す要部拡大断面図である。It is a principal part expanded sectional view which shows one Embodiment of the tank skirt by this invention. 図１に示すタンクスカートを具備したＬＮＧ船の概略全体斜視図である。It is a schematic whole perspective view of the LNG ship provided with the tank skirt shown in FIG. 従来のタンクスカートのスカラップを示す要部拡大断面図である。It is a principal part expanded sectional view which shows the scallop of the conventional tank skirt. 図３に示すタンクスカートのスカラップを補正する補正要領を説明するための図である。It is a figure for demonstrating the correction | amendment point which correct | amends the scallop of the tank skirt shown in FIG.

符号の説明Explanation of symbols

１ ＬＮＧ船
１ａ 船体（基台）
２ タンクスカート
３ タンク
４ タンク側構造材
４ｓ スカラップ
５ 船体側構造材（基台側構造材）
５ｓ スカラップ
６ 構造用異材継手
５４ タンク側構造材
５４ｓ スカラップ
５５ 船体側構造材（基台側構造材）
５５ｓ スカラップ
５６ 構造用異材継手 1 LNG ship 1a Hull (base)
2 Tank skirt 3 Tank 4 Tank side structural material 4s Scallop 5 Hull side structural material (base side structural material)
5s scallop 6 structural dissimilar material joint 54 tank side structural material 54s scallop 55 hull side structural material (base side structural material)
55s Scallop 56 Structural dissimilar joint

Claims (4)

基台と、低温の液体または気体が貯蔵されるタンクとの間に設けられ、かつ前記タンクを前記基台に対して固定支持させるタンクスカートであって、
前記タンクに固定されたタンク側構造材と、該タンク側構造材と材質が異なる前記基台に固定された基台側構造材と、これら構造材を接合する構造用異材継手とを具備し、
前記タンク側構造材の下端に形成されたスカラップの幅が、前記基台側構造材の上端に形成されたスカラップの幅よりも大きいことを特徴とするタンクスカート。 A tank skirt provided between a base and a tank in which a low-temperature liquid or gas is stored and fixedly supporting the tank with respect to the base;
A tank-side structural material fixed to the tank, a base-side structural material fixed to the base different in material from the tank-side structural material, and a structural dissimilar joint for joining these structural materials,
A tank skirt, wherein a width of a scallop formed at a lower end of the tank side structural material is larger than a width of a scallop formed at an upper end of the base side structural material. 前記タンク側構造材の下端に形成されたスカラップの幅が、前記基台側構造材の上端に形成されたスカラップ幅よりも２０ｍｍ大きいことを特徴とする請求項１に記載のタンクスカート。   2. The tank skirt according to claim 1, wherein a width of a scallop formed at a lower end of the tank side structural material is 20 mm larger than a width of a scallop formed at an upper end of the base side structural material. 請求項１または２に記載のタンクスカートを具備してなることを特徴とするＬＮＧ船。   An LNG ship comprising the tank skirt according to claim 1. 請求項１または２に記載のタンクスカートを具備してなることを特徴とする陸上設置型ＬＮＧタンク。   A land-mounted LNG tank comprising the tank skirt according to claim 1.
JP2004256775A 2004-09-03 2004-09-03 Tank skirt Expired - Fee Related JP4592362B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007261413A (en) * 2006-03-28 2007-10-11 Mitsui Eng & Shipbuild Co Ltd Method for installing engine on hull
WO2012176466A1 (en) * 2011-06-22 2012-12-27 川崎重工業株式会社 Dissimilar material joint and structure using dissimilar material joint and method for manufacturing same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013076764A1 (en) * 2011-11-22 2013-05-30 川崎重工業株式会社 Joint for dissimilar materials, tank-supporting member, lng carrier, and method for manufacturing joint for dissimilar materials

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56129395U (en) * 1980-03-03 1981-10-01
JPH0516579U (en) * 1991-08-14 1993-03-02 三菱重工業株式会社 Scalup fitting
JPH07149285A (en) * 1993-11-30 1995-06-13 Mitsubishi Heavy Ind Ltd Polygonal skirt to support spherical cargo oil tank
JP2000171368A (en) * 1998-12-02 2000-06-23 Ishikawajima Harima Heavy Ind Co Ltd Tool for applying tensile stress to inner surface of different material union joint and usage therefor
JP2004074870A (en) * 2002-08-13 2004-03-11 Mitsubishi Heavy Ind Ltd Different member joint

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56129395U (en) * 1980-03-03 1981-10-01
JPH0516579U (en) * 1991-08-14 1993-03-02 三菱重工業株式会社 Scalup fitting
JPH07149285A (en) * 1993-11-30 1995-06-13 Mitsubishi Heavy Ind Ltd Polygonal skirt to support spherical cargo oil tank
JP2000171368A (en) * 1998-12-02 2000-06-23 Ishikawajima Harima Heavy Ind Co Ltd Tool for applying tensile stress to inner surface of different material union joint and usage therefor
JP2004074870A (en) * 2002-08-13 2004-03-11 Mitsubishi Heavy Ind Ltd Different member joint

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007261413A (en) * 2006-03-28 2007-10-11 Mitsui Eng & Shipbuild Co Ltd Method for installing engine on hull
JP4624290B2 (en) * 2006-03-28 2011-02-02 三井造船株式会社 How to install the prime mover on the hull
WO2012176466A1 (en) * 2011-06-22 2012-12-27 川崎重工業株式会社 Dissimilar material joint and structure using dissimilar material joint and method for manufacturing same
JP2013006184A (en) * 2011-06-22 2013-01-10 Kawasaki Heavy Ind Ltd Dissimilar material joint and structure using the dissimilar material joint and method for manufacturing same
CN103619523A (en) * 2011-06-22 2014-03-05 川崎重工业株式会社 Dissimilar material joint and structure using dissimilar material joint and method for manufacturing same
US9073151B2 (en) 2011-06-22 2015-07-07 Kawasaki Jukogyo Kabushiki Kaisha Dissimilar material joint, structure in which dissimilar material joint is used, and method of producing the same
CN103619523B (en) * 2011-06-22 2016-02-03 川崎重工业株式会社 The works of dissimilar material joint and use dissimilar material joint and manufacture method thereof
KR101604733B1 (en) * 2011-06-22 2016-03-25 카와사키 주코교 카부시키 카이샤 Dissimilar material joint and structure using dissimilar material joint and method for manufacturing same

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