JPH07187056A - Construction method for marine spherical tank - Google Patents
Construction method for marine spherical tankInfo
- Publication number
- JPH07187056A JPH07187056A JP5333315A JP33331593A JPH07187056A JP H07187056 A JPH07187056 A JP H07187056A JP 5333315 A JP5333315 A JP 5333315A JP 33331593 A JP33331593 A JP 33331593A JP H07187056 A JPH07187056 A JP H07187056A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- block
- building
- hull
- cover
- 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.)
- Granted
Links
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この出願に係る発明は、船舶の船
体内部に球形タンクを内蔵する、いわゆるＬＮＧ船用の
球形タンクの建造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a spherical tank for a so-called LNG ship, in which the spherical tank is built inside the hull of the ship.
【０００２】[0002]
【従来技術およびその課題】ＬＮＧ船に搭載される球形
タンクの建造は、タンク本体の材質がアルミ合金等の特
殊金属であるため、溶接工事等は、風、湿度、ほこり、
金属粉等が品質に悪影響を及ぼさないように、独立した
室内で施工しなければならない。また船内に搭載される
タンクブロック（通常、南半球、赤道リングおよび北半
球に分割されている）も船内工事を少なくするためには
極力大きい方が効率が良いが、それらは建屋の大きさ、
クレーンの能力から制限されるのが現状である。2. Description of the Related Art The construction of a spherical tank to be mounted on an LNG carrier is such that the tank body is made of a special metal such as aluminum alloy.
Construction must be done in a separate room so that metal powder, etc. does not adversely affect the quality. In addition, the tank blocks installed on board (usually divided into the southern hemisphere, the equatorial ring, and the northern hemisphere) should be as large as possible in order to reduce the amount of work on board, but they are the size of the building,
Currently, it is limited by the capacity of the crane.
【０００３】そこで、従来の舶用球形タンクの建造方法
としては大きく分けて次の2 通りが採用されている。 一つは、球形タンクを製作するための専用工場のよ
うな巨大な建屋の中で、南半球、赤道リングおよび北半
球をそれぞれ接合して球形タンクを構築完成させ、同時
にスカート部も装着して完成させた後、大型クレーンに
より船内に一括搭載する方法である。この方法は、船内
工事が最小となり、最も効率的な工事方法であるが、巨
大な建屋、大能力のクレーン等が必要となり、その設備
に多額の設備投資が必要となる。Therefore, the following two methods are roughly classified as the conventional construction method of the spherical tank for ships. One is to build a spherical tank by joining the southern hemisphere, the equatorial ring, and the northern hemisphere in a huge building like a dedicated factory for manufacturing spherical tanks, and at the same time complete the skirt part. After that, it is a method of loading them all together on a ship using a large crane. This method is the most efficient construction method because it requires the least amount of work on board, but it requires a huge building, a large capacity crane, etc., and requires a large amount of capital investment for the equipment.
【０００４】 二つには、特公昭６１−４５５９４号
および特公昭６１−４５７４３号公報に記載されている
建造方法である。図7 (a) 〜(e) は、上記２つの公報の
記載内容から従来の球形タンクの建造工程を経時的に示
したものである。すなわち、球形タンクの各タンクブロ
ックを工場建屋内で製作してから船内に個々に搭載して
船内で順次接合する方法であって、まず船底部に円形状
のタンク支持材３０を仮セットし( 図(a))、その上に南
半球Ｓ( 図(b))を搭載し、その後図示していないが赤
道、パイブタワー、北半球、ドームといったタンクの各
ブロックを搭載し、そしてスカートを仮搭載する。Secondly, there are construction methods described in JP-B-61-45594 and JP-B-61-45743. FIGS. 7 (a) to 7 (e) show the conventional process of constructing a spherical tank over time from the contents described in the above two publications. That is, this is a method in which each tank block of a spherical tank is manufactured in a factory building, then individually mounted in a ship and sequentially joined in the ship. First, a circular tank support member 30 is temporarily set on the bottom of the ship ( Figure (a)), on which the southern hemisphere S (Figure (b)) is mounted, and then, although not shown, each block of the tank such as the equator, the pipe tower, the northern hemisphere, and the dome is mounted, and the skirt is temporarily mounted.
【０００５】この場合、特公昭６１−４５５９４号公報
に記載の如く、各ブロック間の継手部の溶接工事はその
都度タンクカバーを仮に搭載して船体上に建屋を形成
し、その中で行っている。例えば、図(c) は南半球Ｓと
赤道リングＥとを接合する時の様子で、タンクカバー３
１で船内を覆って溶接を施工する。この後、タンクカバ
ー３１を一旦取り外して北半球Ｎを搭載した後、スカー
トＫの仮搭載およびタンクカバー３１の再搭載を行って
( 図(d))、赤道リングＥと北半球Ｎとを接合して球形タ
ンクを完成させる。球形タンクを完成した後、図示して
いないがスカート部をジャッキで持ち上げタンク全体を
浮かし、船底にセットしたタンク支持材３０（図(a))を
分解して狭隘な隙間から取り除いた後、ジャッキダウン
して、タンクを正規の位置にしてから、スカートＫと船
体Ｈを固定する( 図(e))。In this case, as described in Japanese Examined Patent Publication No. 61-45594, the welding work of the joint between the blocks is carried out by temporarily mounting the tank cover each time to form a building on the hull, and performing the welding work in the building. There is. For example, Figure (c) shows the situation when the southern hemisphere S and the equatorial ring E are joined.
Weld the ship by covering the inside of the ship with 1. After that, the tank cover 31 is once removed and the northern hemisphere N is mounted, and then the skirt K is temporarily mounted and the tank cover 31 is remounted.
(Figure (d)), the equatorial ring E and the northern hemisphere N are joined to complete the spherical tank. After completing the spherical tank, lift the skirt part with a jack (not shown) to float the whole tank, disassemble the tank support 30 (Fig. (A)) set on the bottom of the ship and remove it from the narrow gap. Go down and put the tank in the normal position, then fix the skirt K and the hull H (Fig. (E)).
【０００６】この方法は船内にてタンクの組み立てを行
うため、多額の設備投資も必要なく、現有設備で対応で
きるが、次のような欠点がある。Since this method assembles the tank onboard the ship, it does not require a large amount of capital investment, and the existing equipment can be used, but it has the following drawbacks.
【０００７】球形タンクの支持は赤道部で行うため、船
底上には赤道部を支持するタンクスカートが搭載される
までタンク重量を支える仮置きのタンク支持材が必要と
なるうえ、タンク完成後にはスカート部にジャッキを入
れてタンク全体を浮かし、タンク支持材を狭隘な船底内
から撤去するため細かくばらばらに分解して撤去しなけ
ればならない。またそのためスカートのジャッキアップ
部の補強部材の追加やスカートと船体の固定（溶接）に
よる塗装の補修工事等が後工程にずれ込み作業効率が悪
かった。Since the spherical tank is supported at the equatorial part, a temporary tank support material for supporting the weight of the tank is required until the tank skirt supporting the equatorial part is mounted on the bottom of the ship. It is necessary to put the jack in the skirt to float the whole tank, and to remove the tank support from the narrow bottom of the ship, disassemble it into small pieces and remove it. Therefore, additional work such as the addition of a reinforcing member for the jack-up part of the skirt and the repair work of the paint by fixing (welding) the skirt to the hull were delayed in the subsequent process, resulting in poor work efficiency.
【０００８】この出願に係る発明の主な目的は、定盤上
に最終的に船体に取り付けられるタンクカバーを用いて
即席の建屋を構築してこの中でタンクブロック等を完成
することにより、設備投資が少なく、かつ、船内工事が
少なくて工期短縮化に寄与しうる舶用球形タンクの建造
方法を提供することにある。The main object of the invention according to this application is to construct an instant building using a tank cover that is finally attached to a hull on a surface plate, and complete a tank block and the like in this, thereby providing equipment. An object of the present invention is to provide a method for constructing a spherical tank for a ship, which requires less investment and requires less work on board to contribute to shortening the construction period.
【０００９】[0009]
【課題を解決するための手段】上記目的達成のため、こ
の出願に係る発明の舶用球形タンクの建造方法の基本構
成は、陸上に設けた定盤上にタンク支持材をセットし、
このタンク支持材上に後工程で載せられるタンクブロッ
クを取り囲むような形でタンクカバー受台を所定高さ位
置に設置しておき、次いで前記タンク支持材上に南半
球、赤道リングの２つのブロックを順次載せ、最終的に
船体に取り付けられるタンクカバーを該受台上に載せて
前記タンクブロックを上方から覆う即席の建屋を形成し
た後、前記タンクブロックの継手部分の溶接を施工する
ことにある。To achieve the above object, the basic construction of the method for constructing a spherical tank for a ship according to the invention of the present application is to set a tank support on a surface plate provided on land,
A tank cover pedestal is installed at a predetermined height position so as to surround a tank block to be placed in a later step on this tank support, and then two blocks of the southern hemisphere and the equator ring are placed on the tank support. It is to mount the tank covers that are sequentially mounted and finally mounted on the hull on the pedestal to form an instant building that covers the tank blocks from above, and then weld the joint portions of the tank blocks.
【００１０】そして、上記基本構成を含む具体的な舶用
球形タンク建造方法の一つは、完成した船体内部に球形
タンクを支持・固定するタンクスカートを搭載して船体
に溶接固定する第一工程と、陸上に設けた定盤上にタン
ク支持材をセットし、このタンク支持材上に後工程で載
せられるタンクブロックを取り囲むような形でタンクカ
バー受台を所定高さ位置に設置しておき、次いで前記タ
ンク支持材上に南半球、赤道リングの２つのブロックを
順次載せ、最終的に船体に取り付けられるタンクカバー
を該受台上に載せて前記タンクブロックを上方から覆う
即席の建屋を形成する、第一工程とほぼ並行して又は相
前後してなされる第二工程と、前記定盤上に構築した建
屋の中でタンクブロック継手の溶接を施工し、南半球と
赤道リングから成るタンクブロックを完成させる第三工
程と、完成したタンクブロックを船内に搭載し、前記第
一工程で設けたタンクスカートを介してこれを船体側に
据え付ける第四工程と、北半球をタンクブロック上に搭
載し、次いで前記建屋構築の際に用いたタンクカバーを
船体に搭載した後、北半球とタンクブロックとの継手を
接合して球形タンクを建造する第五工程とからなる。One of the concrete methods for constructing a spherical tank for a ship including the above basic structure is a first step of mounting a tank skirt for supporting and fixing the spherical tank inside the completed hull and welding and fixing it to the hull. , Set the tank support on the surface plate provided on land, and set the tank cover pedestal at a predetermined height position so as to surround the tank block that will be placed in a later process on this tank support, Next, the southern hemisphere and the two blocks of the equatorial ring are sequentially placed on the tank support, and finally the tank cover attached to the hull is placed on the pedestal to form an instant building that covers the tank block from above. Weld the tank block joints in the building built on the surface plate and the second step, which is performed almost in parallel with or in tandem with the first step, and consists of the southern hemisphere and the equatorial ring. The third step of completing the tank block, the fourth step of mounting the completed tank block inside the ship and installing it on the hull side through the tank skirt provided in the first step, and mounting the northern hemisphere on the tank block Then, after mounting the tank cover used in the building construction on the hull, a fifth step of constructing a spherical tank by joining a joint between the northern hemisphere and the tank block.
【００１１】また、上記基本構成を含む第二の建造方法
は、陸上に設けた定盤上にタンク支持材をセットし、こ
のタンク支持材上に後工程で載せられるタンクブロック
を取り囲むような形でタンクカバー受台を所定高さ位置
に設置しておき、次いで前記タンク支持材上に南半球、
赤道リングの２つのブロックを順次載せ、最終的に船体
に取り付けられるタンクカバーを該受台上に載せて前記
タンクブロックを上方から覆う即席の建屋を形成する第
一工程と、前記定盤上に構築した建屋の中でタンクブロ
ック継手の溶接を施工し、南半球と赤道リングとから成
るタンクブロックを完成させる第二工程と、前記タンク
カバーを一旦取り除いた後、タンクブロック上に北半球
を載せ、タンクカバー受台を更に所定高さに設置し直し
て、該受台上に再び前記タンクカバーを載せて球形タン
クを上方から覆う即席の建屋を構築する第三工程と、北
半球とタンクブロックとの継手を接合して球形タンクを
建造する第四工程と、前工程により完成させた球形タン
クを船内に搭載し、予め球形タンクに取り付けた又は船
内に取り付けてあるタンクスカートを介して船体に据え
付けた後、前記建屋構築に用いたタンクカバーを船体に
取り付ける第六工程からなる。A second construction method including the above basic structure is such that a tank supporting member is set on a surface plate provided on land, and a tank block mounted in a later step is surrounded by the tank supporting member. Then, the tank cover pedestal is installed at a predetermined height position, and then on the tank support, the southern hemisphere,
The first step of placing two blocks of the equator ring one by one, and finally placing the tank cover attached to the hull on the pedestal to form an instant building that covers the tank block from above; Weld the tank block joints in the constructed building to complete the tank block consisting of the southern hemisphere and the equatorial ring, and once remove the tank cover, place the northern hemisphere on the tank block, A third step of re-installing the cover pedestal at a predetermined height and placing the tank cover on the pedestal again to cover the spherical tank from above to construct an instant building, and a joint between the northern hemisphere and the tank block. The fourth step of joining the two to construct a spherical tank and the spherical tank completed in the previous step are mounted on the ship and attached to the spherical tank in advance or on the ship. After installation the hull via a tank skirt, made of a sixth step of attaching a tank cover used in the building construction to the hull.
【００１２】[0012]
【作用】定盤上に最終的に船体に取付られるべきタンク
カバー等を用いて即席の建屋を構築しうることで、少な
い設備投資でもってかかる球形タンクに要求される所望
の作業環境を作り出すことができる。これにより南半球
と赤道リングとの継手部の溶接が効率良く行われるよう
になる。[Operation] By constructing an instant building by using the tank cover etc. that should be finally attached to the hull on the surface plate, it is possible to create a desired working environment required for such a spherical tank with a small capital investment. You can As a result, the welding of the joint portion between the southern hemisphere and the equatorial ring can be efficiently performed.
【００１３】そして、第一の建造方法のように、少なく
ともタンク側のスカート部材もこの段階で予めタンクブ
ロックに取り付けておくので、このタンクブロックを船
内に搭載した時の船内工事が大幅に削減される。As in the first construction method, at least the skirt member on the tank side is also attached to the tank block in advance at this stage, so that the onboard work when this tank block is mounted on the ship is greatly reduced. It
【００１４】さらに、クレーン能力が十分な場合或いは
球形タンクが小型でそのタンク全体の重量が小さい場合
には、第二の建造方法の如く、球形タンクそのものを前
記建屋の中で完成させ、しかも船体側のスカート部も予
め取り付けることができれば、船内工事のより一層の減
少化が期待できる。Further, when the crane capacity is sufficient or the spherical tank is small and the weight of the whole tank is small, the spherical tank itself is completed in the building as in the second construction method, and the hull is completed. If the side skirt can also be attached in advance, further reduction of onboard work can be expected.
【００１５】[0015]
【実施例】この出願に係る発明の舶用球形タンク建造方
法の基本思想は、次の通りである。すなわち、球形タン
クの各ブロックを工場建屋内で製作してから船内に搭載
する前に、屋外の定盤上にタンク支持材をセットし、こ
のタンク支持材の周囲にタンクカバー受台を設けて囲い
を形成し、前記タンク支持材の上に南半球を置いてから
赤道部をその上に置き、最終的に船体の一部となるべき
タンクカバーを前記受台上に載せてタンクブロックを上
方から覆って即席の建屋を形成し、その建屋の中でタン
クブロック継手部の溶接を施工する。一方、完成された
船体内部において、タンクスカートを搭載し船体部（フ
ァンデーションデッキ）と溶接し固定しておく。接合が
完了した南半球と赤道部を一つのブロックとして船内に
搭載してタンクスカート部と赤道部とを接続する。そし
てその後パイプタワー、北半球、ドーム部を搭載して球
形タンクを完成させる。The basic idea of the method for constructing a spherical tank for a ship according to the present invention is as follows. That is, before manufacturing each block of the spherical tank in the factory building and mounting it on the ship, set the tank support on the outdoor surface plate, and install the tank cover pedestal around this tank support. Form an enclosure, place the southern hemisphere on the tank support, then place the equator on it, and finally put the tank cover that will become a part of the hull on the pedestal and put the tank block from above. Cover and form an instant building, and weld the tank block joint in the building. On the other hand, inside the completed hull, a tank skirt is mounted and welded and fixed to the hull part (foundation deck). The Southern Hemisphere and the equator that have been joined are mounted on the ship as one block to connect the tank skirt and the equator. Then, the pipe tower, northern hemisphere, and dome are installed to complete the spherical tank.
【００１６】以下、図面を参照しながらこの出願にかか
る発明の実施例を具体的に説明する。図１は、陸上で製
作する球形タンクおよびスカートの構成部品を分解して
示した概略図である。球形タンクは、3 つのブロック、
つまり、南半球Ｓ、赤道リングＥ、北半球Ｎに分けてそ
れぞれ製作される。赤道リングＥの赤道位置にはスカー
トを接合するための取合部材１が突設されている。この
スカート全体は、アルミ材、ステンレス材およびスチー
ル材の部分から成っており、図４にも示すように通常ア
ルミ材のスカート部２とステンレス材のスカート部３と
の間にフランジ状のトランジッションジョイント４が設
けられ、この継手部分の接合は特殊ゆえ工場内で予め接
合がなされる。また、ステンレス材のスカート部３と接
合される、スチール材のスカート部５は船体Ｈ上に溶接
固定されるものであって、上端が棚板状５ａに形成さ
れ、補強のためにスチフナ５ｂが取付けられている。一
方、最終的に船体に取り付けられるドーム状のタンクカ
バー６も別途工場で製作される。Embodiments of the invention according to this application will be specifically described below with reference to the drawings. FIG. 1 is an exploded schematic view of components of a spherical tank and a skirt manufactured on land. The spherical tank has three blocks,
In other words, it is manufactured separately for the southern hemisphere S, the equatorial ring E, and the northern hemisphere N. At the equator position of the equator ring E, a connecting member 1 for joining the skirt is provided in a protruding manner. The entire skirt is made of aluminum, stainless and steel parts. As shown in FIG. 4, a flange-shaped transition joint is normally provided between the skirt part 2 made of aluminum and the skirt part 3 made of stainless steel. 4 is provided, and since the joint portion is specially joined, it is preliminarily joined in the factory. The steel skirt 5 joined to the stainless skirt 3 is welded and fixed on the hull H, and the upper end of the skirt 5 is formed into a shelf plate shape 5a, and the stiffener 5b is provided for reinforcement. Installed. On the other hand, the dome-shaped tank cover 6 that is finally attached to the hull is also manufactured in a separate factory.
【００１７】次に、図２〜図６に基づいてこの出願に係
る発明のタンク建造方法を経時的に説明する。図２に示
すように、陸上の設けた定盤７上に円形のタンク支持材
８をセットし、これを同心状に取り囲むようにやぐら９
を南半球Ｓの上端よりやや下方の高さまで構築する。や
ぐら９は円周上一定間隔で配置する。この周状に設けた
やぐら９の上部間に水平方向にボックスリング架台１０
が架設される。またそのボックスリング架台１０上にタ
ンクカバー６を支持するためのリング支台１１が周状に
に囲いを形成するように設置されてタンクカバー受台１
２が所定高さ位置に形成され、該タンクカバー受台１２
の上端にタンクカバー６が搭載できるようになってい
る。Next, the tank construction method of the invention according to this application will be described with reference to FIGS. As shown in FIG. 2, a circular tank support member 8 is set on a surface plate 7 provided on land, and a yagura 9 is concentrically surrounded by the tank support member 8.
Is constructed to a height slightly below the upper end of the southern hemisphere S. The towers 9 are arranged at regular intervals on the circumference. A box ring mount 10 is horizontally provided between the upper portions of the circumferentially provided yagura 9.
Is erected. Further, a ring abutment 11 for supporting the tank cover 6 is installed on the box ring base 10 so as to form a circumferential enclosure, and the tank cover receiving base 1
2 is formed at a predetermined height position, and the tank cover pedestal 12
The tank cover 6 can be mounted on the upper end of the.
【００１８】まず、南半球Ｓに相当するブロックをクレ
ーンでタンク支持材８上に搭載し、この上に赤道リング
Ｅのブロックを載せる。南半球Ｓと赤道リングＥとを合
わせたブロックを以下タンクブロックＳＥという。図２
はこの状態を示している。そして、タンクカバー６をタ
ンクカバー受台１２上に載せて、定盤７上に即席の建屋
Ａを構築する。この段階で南半球Ｓと赤道リングＥとの
ブロック継手１３部分の溶接接合を行う。この場合、タ
ンクカバー６とリング支台１１とボックスリング架台１
０とによってタンクブロックＳＥないしブロック継手１
３部分を上方および側面から囲むほぼ閉囲空間が形成さ
れることから、定盤上に即席の建屋Ａが形成されたこと
となり、従来の恒久的に設けた巨大建屋内で行うと同様
の環境を作り出すことができ、特殊な溶接工事が外部の
要因（風、湿気、埃、ごみ等）によってその溶接品質に
悪影響を受けることがない。First, a block corresponding to the southern hemisphere S is mounted on the tank support member 8 by a crane, and the block of the equatorial ring E is mounted thereon. The block that combines the southern hemisphere S and the equator ring E will be called the tank block SE below. Figure 2
Indicates this state. Then, the tank cover 6 is placed on the tank cover pedestal 12, and the imposing building A is constructed on the surface plate 7. At this stage, the welding of the block joint 13 portion between the southern hemisphere S and the equatorial ring E is performed. In this case, the tank cover 6, the ring abutment 11, and the box ring mount 1
0 and tank block SE or block joint 1
Since an almost enclosed space that surrounds the three parts from above and from the side is formed, it means that an improvised building A has been formed on the surface plate, and the same environment as in a conventional permanently built huge building. The special welding work does not adversely affect the welding quality due to external factors (wind, moisture, dust, dust, etc.).
【００１９】一方、図３に示すように、球形タンクが搭
載される船体は予め完成させてある。その船体Ｈ内のフ
ァンデーションデッキ１４上にはスティール材からなる
棚板形状のスカート部（以下「船体側スカート部とい
う）５が立設されている。On the other hand, as shown in FIG. 3, the hull on which the spherical tank is mounted has been completed in advance. On the foundation deck 14 in the hull H, a shelf-board-shaped skirt portion 5 (hereinafter referred to as "hull side skirt portion") 5 made of steel is erected.
【００２０】定盤上で構築された南半球と赤道リングか
ら成るタンクブロックＳＥがクレーンで吊られて、船体
内搭載位置までもってこられ、二点鎖線で示す位置まで
下降させてタンク側スカート部が船体側スカート部５上
に搭載される。図４の如く船体側スカート部５の頂部は
棚板状５ａになっているため、位置決めが容易となる。
スカート部同士が接合されるとタンクブロックＳＥの全
重量がスカートＫを介して船体Ｈ側に支持されるように
なる。A tank block SE composed of a southern hemisphere and an equatorial ring constructed on a surface plate is hung by a crane and brought to a mounting position in a ship, and lowered to a position indicated by a chain double-dashed line so that a tank side skirt portion is formed. It is mounted on the hull side skirt portion 5. As shown in FIG. 4, the top portion of the hull side skirt portion 5 has a shelf plate shape 5a, which facilitates positioning.
When the skirt portions are joined together, the total weight of the tank block SE is supported on the hull H side via the skirt K.
【００２１】次いで、図５に示す如く、先に搭載されて
船内に収まっている南半球Ｓと赤道リングＥから成るタ
ンクブロックＳＥ上に北半球Ｎのブロックが載せられた
後、上述した定盤上の建屋として用いたタンクカバー６
を船体の所定位置に搭載して建屋を構築する。そして図
６の状態にて赤道リングＥと北半球Ｎとの境界部（ブロ
ック継手）１５を溶接し接合する。この場合も建屋内で
の溶接工事となるので品質への悪影響はない。上記のよ
うにして船体内部に球形タンクが建造される。Next, as shown in FIG. 5, after the block of the northern hemisphere N is placed on the tank block SE composed of the southern hemisphere S and the equatorial ring E, which is previously mounted and accommodated in the ship, on the surface plate described above. Tank cover 6 used as a building
Is installed at a predetermined position on the hull to build a building. Then, in the state of FIG. 6, the boundary portion (block joint) 15 between the equatorial ring E and the northern hemisphere N is welded and joined. In this case as well, welding work is performed inside the building, so there is no adverse effect on quality. The spherical tank is built inside the hull as described above.
【００２２】なお、上記実施例では、球形タンクが大型
の場合を想定しクレーン能力の関係から、南半球と赤道
リングのタンクブロックを先ず完成したものであるが、
クレーン能力が十分あれば、或いは球形タンクが小型で
その全体重量が小さい場合には、図２の状態から更にや
ぐら９を高くしてタンクカバー６のない状態で北半球も
搭載して定盤上で球形タンクそのものを完成させるよう
にしてもよい。また、船体側スカート部も定盤上での工
事の際に同時に取り付け完了しておくこともできる。要
は、船に搭載するタンクカバーを利用して、定盤上に建
屋を構築することにより特別な設備投資をせずともタン
クブロックの溶接工事のための建屋を構築することがで
きようにすればよい。スカート全体（又は上記実施例の
ように一部のスカート部）を取り付けた状態で船内に搭
載すれば、狭隘な作業環境の悪い船内での溶接作業が減
少して工期短縮に寄与することができる。In the above embodiment, the tank block for the southern hemisphere and the equator ring was first completed in consideration of the crane capacity assuming a large spherical tank.
If the crane capacity is sufficient, or if the spherical tank is small and the total weight is small, the yagura 9 is raised from the state of FIG. 2 and the northern hemisphere is also mounted without the tank cover 6 on the surface plate. The spherical tank itself may be completed. Also, the skirt part on the hull side can be installed at the same time when the work is done on the surface plate. In short, it is possible to build a building for tank block welding work by constructing a building on the surface plate using the tank cover installed on the ship, without any special capital investment. Good. If the entire skirt (or part of the skirt as in the above embodiment) is mounted on a ship, welding work in a narrow ship with a poor working environment can be reduced, contributing to shortening the construction period. .
【００２３】[0023]
【発明の効果】 定盤上に最終的に船体に取り付けられるタンクカバ
ー等を用いて即席の建屋を形成でき、その中で南半球と
赤道ブロックの接合を行うため、タンクブロック継手の
特殊な溶接の品質確保が可能となるとともに、巨大な建
屋等を恒久的に建設する場合に比べ設備投資が遙かに少
なくて済む。また船内と違って陸上における定盤上工事
となるので作業環境もよく効率がよい。[Effects of the Invention] An instant building can be formed on the surface plate by using a tank cover or the like that is finally attached to the hull, and the southern hemisphere and the equatorial block are joined therein. The quality can be ensured, and the capital investment is much smaller than in the case of permanently building a huge building. Also, unlike onboard, the work is done on the surface plate on land, so the working environment is good and efficient.
【００２４】 船内に搭載するブロック数も従来より
減少するので、それだけ現場工数が削減できる。Since the number of blocks mounted on the ship is also smaller than in the conventional case, the number of on-site man-hours can be reduced accordingly.
【００２５】 定盤上で南半球と赤道部を組み立てた
後、船内のスカートと接合するため、船底上にタンク支
持材が不要となり、その分解撤去のためのジャッキアッ
プ・ダウン作業が省略できるとともに、そのためのタン
クスカート部の補強も不要となる。またスカートと船体
との溶接もタンク搭載前の初期工程で行うため塗装補修
作業も容易となる。以上の効果からタンク建造工期を大
幅に短縮することが可能となる。After assembling the southern hemisphere and the equator on the surface plate, the tank support is not required on the bottom of the ship because it is joined to the skirt inside the ship, and the jack up / down work for its disassembly and removal can be omitted. Therefore, it is not necessary to reinforce the tank skirt. In addition, the welding of the skirt and the hull is also performed in the initial process before mounting the tank, so the paint repair work becomes easy. Due to the above effects, the tank construction period can be significantly shortened.
【図１】この出願に係る発明の舶用球形タンクの建造方
法における構成品を分解して示した概略図である。FIG. 1 is a schematic view showing components disassembled in a method for constructing a spherical tank for a ship according to the invention of this application.
【図２】定盤上に建屋を構築した状態およびこの中でタ
ンクブロックを完成させる状態を示した図である。FIG. 2 is a diagram showing a state in which a building is built on a surface plate and a state in which a tank block is completed therein.
【図３】タンクブロックを船内に搭載する状態を示した
図である。FIG. 3 is a diagram showing a state in which a tank block is mounted on a ship.
【図４】タンクブロックを搭載した時のスカート部分の
拡大図である。FIG. 4 is an enlarged view of a skirt portion when a tank block is mounted.
【図５】タンクブロックを船内に搭載した後、北半球お
よびタンクカバーを搭載する時の状態を示す図である。FIG. 5 is a view showing a state in which the northern hemisphere and the tank cover are mounted after the tank block is mounted on the ship.
【図６】船内のタンクブロック上に北半球を搭載し、タ
ンクカバーを船体所定位置に載せて、タンクブロック
（赤道リング）と北半球とを接合する時の状態を示す図
である。FIG. 6 is a diagram showing a state in which the northern hemisphere is mounted on a tank block in a ship, the tank cover is placed at a predetermined position on the hull, and the tank block (equatorial ring) and the northern hemisphere are joined.
【図７】(a) 〜(e) は 従来の舶用球形タンクの建造方
法を経時的に示す図である。7 (a) to 7 (e) are views showing a conventional method for constructing a spherical vessel for a marine tank over time.
Ｓ…南半球 Ｅ…赤道リング Ｎ…北半球 ＳＥ…タンクブロック Ｋ…スカート １…スカート取付部 ２…（アルミ材の）スカート部 ３…（ステンレス材の）スカート部 ４…トランジッションジョイント ５…船体側スカート部（スチール材のスカート部） ６…タンクカバー ７…定盤 ８…タンク支持材 ９…やぐら １０…ボックスリング架台 １１…リング支台 １２…タンクカバー受台 S ... Southern hemisphere E ... Equatorial ring N ... Northern hemisphere SE ... Tank block K ... Skirt 1 ... Skirt mounting part 2 ... (Aluminum) skirt part 3 ... (Stainless steel) skirt part 4 ... Transition joint 5 ... Hull side skirt part (Skirt of steel material) 6 ... Tank cover 7 ... Surface plate 8 ... Tank support material 9 ... Yagura 10 ... Box ring mount 11 ... Ring abutment 12 ... Tank cover cradle
Claims (3)
ットし、このタンク支持材上に後工程で載せられるタン
クブロックを取り囲むような形でタンクカバー受台を所
定高さ位置に設置しておき、次いで前記タンク支持材上
に南半球、赤道リングの２つのブロックを順次載せ、最
終的に船体に取り付けられるタンクカバーを該受台上に
載せて前記タンクブロックを上方から覆う即席の建屋を
形成した後、前記タンクブロックの継手部分の溶接を施
工することを特徴とする舶用球形タンクの建造方法。1. A tank support is set on a surface plate provided on land, and a tank cover pedestal is installed at a predetermined height position so as to surround a tank block to be placed in a later step on the tank support. Then, the two blocks of the southern hemisphere and the equatorial ring are sequentially placed on the tank support, and the tank cover finally attached to the hull is placed on the pedestal to cover the tank block from above. After the formation of the tank, the welding of the joint portion of the tank block is performed, and the method for constructing a spherical tank for a ship.
ンクの建造方法。(a) 完成した船体内部に球形タンクを
支持・固定するタンクスカートを搭載して船体に溶接固
定する第一工程と、(b) 陸上に設けた定盤上にタンク支
持材をセットし、このタンク支持材上に後工程で載せら
れるタンクブロックを取り囲むような形でタンクカバー
受台を所定高さ位置に設置しておき、次いで前記タンク
支持材上に南半球、赤道リングの２つのブロックを順次
載せ、最終的に船体に取り付けられるタンクカバーを該
受台上に載せて前記タンクブロックを上方から覆う即席
の建屋を形成する、第一工程とほぼ並行して又は相前後
してなされる第二工程と、(c) 前記定盤上に構築した建
屋の中でタンクブロック継手の溶接を施工し、南半球と
赤道リングから成るタンクブロックを完成させる第三工
程と、(d) 完成したタンクブロックを船内に搭載し、前
記第一工程で設けたタンクスカートを介してこれを船体
側に据え付ける第四工程と、(e) 北半球をタンクブロッ
ク上に搭載し、次いで前記建屋構築の際に用いたタンク
カバーを船体に搭載した後、北半球とタンクブロックと
の継手を接合して球形タンクを建造する第五工程。2. A method of constructing a spherical tank for a ship, comprising the following steps (a) to (e). (a) The first step of mounting the tank skirt that supports and fixes the spherical tank inside the completed hull and welding and fixing it to the hull, and (b) setting the tank support material on the surface plate provided on land, A tank cover pedestal is installed at a predetermined height position so as to surround a tank block that will be placed in a later step on the tank support, and then two blocks of the southern hemisphere and the equator ring are sequentially installed on the tank support. The second step is carried out almost in parallel with or after the first step, in which the tank cover to be mounted and finally attached to the hull is mounted on the pedestal to form an instant building that covers the tank block from above. Steps, (c) Welding the tank block joints in the building built on the surface plate, and completing the tank block consisting of the southern hemisphere and the equatorial ring, and (d) completing the completed tank block. On board The fourth step is to install it on the hull side through the tank skirt provided in the first step, and (e) install the northern hemisphere on the tank block, and then use the tank cover used when building the building. The fifth step is to build a spherical tank by joining the joints of the northern hemisphere and the tank block after mounting on the hull.
ンクの建造方法。(a) 陸上に設けた定盤上にタンク支持
材をセットし、このタンク支持材上に後工程で載せられ
るタンクブロックを取り囲むような形でタンクカバー受
台を所定高さ位置に設置しておき、次いで前記タンク支
持材上に南半球、赤道リングの２つのブロックを順次載
せ、最終的に船体に取り付けられるタンクカバーを該受
台上に載せて前記タンクブロックを上方から覆う即席の
建屋を形成する第一工程と、(b) 前記定盤上に構築した
建屋の中でタンクブロック継手の溶接を施工し、南半球
と赤道リングとから成るタンクブロックを完成させる第
二工程と、(c) 前記タンクカバーを一旦取り除いた後、
タンクブロック上に北半球を載せ、タンクカバー受台を
更に所定高さに設置し直して、該受台上に再び前記タン
クカバーを載せて球形タンクを上方から覆う即席の建屋
を構築する第三工程と、(d) 北半球とタンクブロックと
の継手を接合して球形タンクを建造する第四工程と、
(e) 前工程により完成させた球形タンクを船内に搭載
し、予め球形タンクに取り付けた又は船内に取り付けて
あるタンクスカートを介して船体に据え付けた後、前記
建屋構築に用いたタンクカバーを船体に取り付ける第六
工程。3. A method of constructing a spherical tank for a ship, comprising the following steps (a) to (e): (a) Set the tank support on the surface plate installed on land, and install the tank cover pedestal at a predetermined height position so that it surrounds the tank block that will be placed in a later process on this tank support. Then, the two blocks of the southern hemisphere and the equatorial ring are sequentially placed on the tank support, and the tank cover that is finally attached to the hull is placed on the pedestal to form an instant building that covers the tank block from above. The first step of, and (b) the welding of the tank block joint in the building built on the surface plate, the second step of completing the tank block consisting of the southern hemisphere and the equatorial ring, (c) the After removing the tank cover,
Third step of placing the northern hemisphere on the tank block, re-installing the tank cover pedestal at a predetermined height, placing the tank cover on the pedestal again, and constructing an instant building that covers the spherical tank from above And (d) a fourth step of constructing a spherical tank by joining the joints of the northern hemisphere and the tank block,
(e) The spherical tank completed in the previous process is mounted on the ship and installed on the hull via the tank skirt that is attached to the spherical tank in advance or is attached to the inside of the ship, and then the tank cover used for building the building is The sixth step to attach to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5333315A JP2768895B2 (en) | 1993-12-27 | 1993-12-27 | Construction method of marine spherical tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5333315A JP2768895B2 (en) | 1993-12-27 | 1993-12-27 | Construction method of marine spherical tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07187056A true JPH07187056A (en) | 1995-07-25 |
| JP2768895B2 JP2768895B2 (en) | 1998-06-25 |
Family
ID=18264740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5333315A Expired - Lifetime JP2768895B2 (en) | 1993-12-27 | 1993-12-27 | Construction method of marine spherical tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2768895B2 (en) |
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