JP2005247038A - Independent tank installation stand and installation method - Google Patents

Independent tank installation stand and installation method Download PDF

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JP2005247038A
JP2005247038A JP2004057275A JP2004057275A JP2005247038A JP 2005247038 A JP2005247038 A JP 2005247038A JP 2004057275 A JP2004057275 A JP 2004057275A JP 2004057275 A JP2004057275 A JP 2004057275A JP 2005247038 A JP2005247038 A JP 2005247038A
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independent tank
gantry
installation
stand
top plate
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JP4071205B2 (en
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Shuzo Yamamoto
修三 山本
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Shin Kurushima Dockyard Co Ltd
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Shin Kurushima Dockyard Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for installing an independent tank without a retract process, which is capable of making fine adjustment to an installation stand easily even after temporary installation of the independent tank in installation work for the independent tank of a chemical carrying vessel, and surely bringing the top plate of the installation stand into close contact with a pressure-tight heat insulating material. <P>SOLUTION: A cylindrical stand sliding part with an outer diameter slightly smaller than the inner diameter of a cylindrical stand fixing part is inserted in the cylindrical stand fixing part with its upper part open, thereby constituting the installation stand. The top plate welded to the upper part of the cylindrical stand sliding part is slid upward and brought into face contact with the bottom part of the independent tank temporarily received. The upper peripheral part of the cylindrical stand fixing part and the peripheral surface of the cylindrical stand sliding part are welded all around to fix the installation stand. Then, a temporary receiving stand is taken away, thereby installing the independent tank. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は船舶内に設置される独立タンクの据付架台およびその据付架台を用いた独立タンクの据付方法に関する。   The present invention relates to a stand for an independent tank installed in a ship and a method for installing an independent tank using the stand.

ＬＰＧ運搬船、ＬＮＧ運搬船あるいはアスファルト運搬船のようなケミカル運搬船には、図３に示すような独立タンクが設置されている。図３はケミカル運搬船の縦断面の模式図であり、図３において、符号５はケミカル運搬船で、図面に向かって右側がケミカル運搬船５の船首であり、符号５１はケミカル運搬船５の船倉、５２はケミカル運搬船５の船体二重底内底板である。そして、符号６は船倉５１に据付けられた独立タンク、符号４は船体二重底内底板５２上に複数個配設された独立タンク６の据付架台である。図３に示すように、この独立タンク６は、船倉５１内に複数個設置されているが、多くの場合、以下のような方法で据付架台４に設置されていた。   An independent tank as shown in FIG. 3 is installed in a chemical carrier such as an LPG carrier, an LNG carrier, or an asphalt carrier. 3 is a schematic diagram of a vertical section of the chemical carrier. In FIG. 3, reference numeral 5 is a chemical carrier, the right side of the drawing is the bow of the chemical carrier 5, 51 is a hold of the chemical carrier 5, 52 is It is a hull double bottom inner bottom plate of the chemical carrier 5. Reference numeral 6 denotes an independent tank installed in the hold 51, and reference numeral 4 denotes an installation stand for the independent tank 6 provided on the inner bottom plate 52 of the hull double bottom. As shown in FIG. 3, a plurality of the independent tanks 6 are installed in the hold 51, but in many cases, the independent tanks 6 are installed on the installation base 4 by the following method.

図４は据付架台４の拡大正面図であり、据付架台４は、平面視が十字状で船体二重底内底板５２から垂直に溶着された鋼製のブラケットと、ブラケット４２、４２、・・・の上端に水平に溶着された鋼製の天板４１からなっている。また、据付架台４の対向する位置の独立タンク６の底板には、耐圧断熱材６１が固着されていて、鋼製のブラケット６２で補強されている。
そして、耐圧断熱材６１の下面と天板４１の上面間には、ライナ４３が介挿されていて、各々の据付架台４の天板４１と独立タンク６の底板との離間距離に応じてライナ４３の厚さを調整することによって、耐圧断熱材６１の底板と据付架台４の天板４１の間に隙間を生じることのないようにして設置されている。 FIG. 4 is an enlarged front view of the mounting base 4. The mounting base 4 includes a steel bracket and a bracket 42, 42,... -It consists of the steel top plate 41 welded horizontally to the upper end of. Further, a pressure-resistant heat insulating material 61 is fixed to the bottom plate of the independent tank 6 at a position opposite to the mounting base 4 and is reinforced by a steel bracket 62.
A liner 43 is interposed between the lower surface of the pressure-resistant heat insulating material 61 and the upper surface of the top plate 41, and the liner is set according to the separation distance between the top plate 41 of each installation base 4 and the bottom plate of the independent tank 6. By adjusting the thickness of 43, it is installed so as not to cause a gap between the bottom plate of the pressure-resistant heat insulating material 61 and the top plate 41 of the installation base 4.

また、この種の従来タンクの据付方法としては、例えば、特開昭６１−８１２８９号公報に記載のものが知られている。図５は特開昭６１−８１２８９号公報に記載の第１図に相当する図であるが、特開昭６１−８１２８９号公報には、その取付方法として、「独立タンク（１１１）を支持する複数個の支持台（１１２）を船体床面（１１３）上の所定の位置に固定すると共に、これら各支持台（１１２）に対応するタンク（１１１）底部に耐圧断熱材（１１４）をそれぞれ固着する。そして、上記支持台（１１２）の各上面と基準平面との鉛直方向の差及び上記断熱材（１１４）の各下面と基準平面との差を、トランシット等を使用してそれぞれ測定する。次に、それぞれ対応する位置の支持台（１１２）と断熱材（１１４）とにおける各測定合計値に応じた厚さのライナー（１１５）を、各支持台（１１２）上面に固定されたストッパー枠（１１６）内に挿入した後、挿入方向の端部をストッパーボルト（図示外）により位置決めする。」とされ、その効果は、「支持台を先に船体に固定し、そして支持台上面とそれに対応する断熱材下面との差に対応する厚みのライナーを、支持台上面に配置した後、独立タンクを支持台上に載置して据え付けるため、従来のような切断作業および溶接作業を行わなくてすみ、従って上記作業のためのスペースが不要となるので、船体の容積効率を大に即ち船体の小型化を図ることができる。」旨が記載されている。
特開昭６１−８１２８９号公報 Further, as a method for installing this type of conventional tank, for example, the one described in JP-A-61-81289 is known. FIG. 5 is a view corresponding to FIG. 1 described in Japanese Patent Application Laid-Open No. 61-81289. However, Japanese Patent Application Laid-Open No. 61-81289 discloses that “independent tank (111) is supported”. A plurality of support bases (112) are fixed at predetermined positions on the hull floor (113), and a pressure-resistant heat insulating material (114) is fixed to the bottom of the tank (111) corresponding to each of the support bases (112). Then, the vertical difference between each upper surface of the support base (112) and the reference plane and the difference between each lower surface of the heat insulating material (114) and the reference plane are measured using a transit or the like. Next, a stopper frame in which a liner (115) having a thickness corresponding to each measured total value in the support base (112) and the heat insulating material (114) at the corresponding positions is fixed to the upper surface of each support base (112). Insert in (116) After that, the end in the insertion direction is positioned by a stopper bolt (not shown). ”The effect is that“ the support base is fixed to the hull first, and the support base upper surface and the corresponding heat insulating material lower surface After placing the liner with a thickness corresponding to the difference between the two on the upper surface of the support base, the independent tank is placed on the support base and installed, so that it is not necessary to perform conventional cutting and welding operations. Therefore, it is described that the space efficiency for the hull is increased, that is, the hull can be reduced in size.
JP-A-61-81289

しかし、前述した独立タンクの据付方法では、据付架台の天板の上面と独立タンクの底板に固着された耐圧断熱材の下面が水平であることを前提としており、据付架台を溶着させる船体二重底内底板もまた水平であることを前提としている。特開昭６１−８１２８９号公報に記載の発明であっても、この前提条件を必要としており、据付架台の天板の上面と耐圧断熱材の下面が、相対的に傾斜していることは考慮されていない。   However, the above-described independent tank installation method is based on the premise that the top surface of the top plate of the installation base and the bottom surface of the pressure insulation material fixed to the bottom plate of the independent tank are horizontal. It is assumed that the bottom inner bottom plate is also horizontal. Even in the invention described in Japanese Patent Laid-Open No. 61-81289, this precondition is necessary, and it is considered that the top surface of the top plate of the installation base and the bottom surface of the pressure-resistant heat insulating material are relatively inclined. It has not been.

このため、据付架台の天板の上面や、耐圧断熱材の下面が水平ではない場合には、独立タンクの据付時に、据付架台の天板の上面と耐圧断熱材の下面が密接した面接触とはならずに点接触や線接触となる、いわゆる片当り現象が生ずるとともに、据付架台の天板の上面と耐圧断熱材の下面との間に隙間が生ずることとなり、このような現象が生ずることのないよう、精度管理に多くの労力を費やすことになる。この「片当り」は、そのまま放置すると据付架台は偏心荷重を受け、独立タンクの荷重を天板全体で有効に負担できず、見かけ上の強度は低下することになる。そのため、据付架台の天板の上面と耐圧断熱材の下面との間の隙間には、薄いライナを介挿させたり、極端に隙間が大きい場合には、一旦仮据付した独立タンクを取外して、据付架台自体を解体し作り直すこともある。
このような後戻り作業が生じると、膨大な現場工数が発生し、経済的にも時間的にも多くの損失を生ずる。 For this reason, if the top surface of the top plate of the installation base and the bottom surface of the pressure insulation material are not horizontal, when the independent tank is installed, the top surface of the top plate of the installation base and the bottom surface of the pressure insulation material are in close contact with each other. In other words, point contact or line contact occurs, so-called one-side contact phenomenon occurs, and a gap is formed between the top surface of the mounting base and the bottom surface of the pressure-resistant heat insulating material. As a result, much work is required for accuracy control. If this “one-piece” is left as it is, the mounting base receives an eccentric load, and the load of the independent tank cannot be effectively borne by the entire top plate, and the apparent strength is lowered. Therefore, a thin liner is inserted in the gap between the upper surface of the top plate of the installation base and the lower surface of the pressure-resistant heat insulating material, or if the gap is extremely large, remove the temporarily installed independent tank, The installation base itself may be dismantled and rebuilt.
When such a return operation occurs, a huge number of on-site man-hours are generated, resulting in a large loss both economically and in time.

そこで、本願発明は、独立タンクを仮据付した後でも、容易に据付架台の微調整が可能であって、据付架台の天板の上面と耐圧断熱材の下面が密接した面接触とすることができる独立タンク据付架台を提供することを目的とする。   Therefore, the present invention can easily fine-adjust the installation stand even after temporarily installing the independent tank, and the top surface of the top plate of the installation stand and the bottom surface of the pressure-resistant heat insulating material can be in close contact with each other. The purpose is to provide an independent tank installation stand that can be used.

上記課題を解決するために、本願請求項１に係る独立タンク据付架台は、船体二重底内底板上に複数個配設される独立タンク据付架台であって、前記据付架台は、前記二重底内底板上に固着され上部が開放された鋼製の円筒状架台固定部と、前記架台固定部内に挿脱可能に挿着され上部に天板が溶着された鋼製の円筒状架台摺動部からなり、前記架台固定部の内周面と前記架台摺動部の外周面間には所定の間隙を有していることを特徴とする。
また、本願請求項２に係る独立タンク据付架台は、本願請求項１に係る独立タンク据付架台であって、前記架台固定部の円筒部には上部が開放された複数のスリットが貫設されていることを特徴とする。
そして、本願請求項３に係る独立タンク据付方法は、本願請求項１または本願請求項２に係る独立タンク据付架台を使用する独立タンク据付方法であって、船体二重底内底板上に設置される独立タンクを仮受け台で仮受けし、前記独立タンク底部に前記据付架台に対向する位置に固着された耐圧断熱材の下面に前記架台摺動部の前記天板を上方向に摺動させて面接触させ、前記架台固定部の上部外周端部と前記架台摺動部の円筒外周部とを溶着し、その後、前記仮受け台を撤去することにより前記独立タンクを設置することを特徴とする。
さらに、本願請求項４に係る独立タンク据付方法は、本願請求項３に係る独立タンク据付方法であって、前記架台摺動部の前記天板の上面と前記耐圧断熱材の下面に所定の厚さを有するライナを介在させたことを特徴とする。 In order to solve the above-mentioned problem, an independent tank installation base according to claim 1 of the present application is a plurality of independent tank installation bases arranged on the bottom plate of the hull double bottom. A steel cylindrical base fixing part fixed on the bottom inner bottom plate and opened at the top, and a steel cylindrical base sliding part that is removably inserted into the base fixing part and the top plate is welded to the top. And a predetermined gap is provided between the inner peripheral surface of the gantry fixing portion and the outer peripheral surface of the gantry sliding portion.
An independent tank installation stand according to claim 2 of the present application is an independent tank installation stand according to claim 1 of the present invention, and a plurality of slits whose upper portions are opened are provided in the cylindrical portion of the mount fixing portion. It is characterized by being.
The independent tank installation method according to claim 3 of the present application is an independent tank installation method using the independent tank installation stand according to claim 1 or claim 2 of the present application, and is installed on the bottom plate of the hull double bottom. The independent tank is temporarily received by a temporary cradle, and the top plate of the gantry sliding part is slid upward on the lower surface of the pressure-resistant heat insulating material fixed to the bottom of the independent tank at a position facing the installation gantry. The independent tank is installed by welding the upper outer peripheral end of the gantry fixing part and the cylindrical outer peripheral part of the gantry sliding part, and then removing the temporary cradle. To do.
Furthermore, the independent tank installation method according to claim 4 of the present application is the independent tank installation method according to claim 3 of the present application, wherein a predetermined thickness is provided on the upper surface of the top plate and the lower surface of the pressure-resistant heat insulating material of the gantry sliding portion. It is characterized by interposing a liner having a thickness.

本願請求項１および本願請求項２に係る独立タンク据付架台にあっては、架台固定部に対して架台摺動部は架台固定部内に挿脱可能に挿着されているため、架台固定部と架台摺動部を溶着するまでは摺動自在となっている。
また、架台固定部の内周面と架台摺動部の外周面間には所定の間隙を有しているため、所定の範囲内で、架台固定部に対して架台摺動部上部の天板の面を前後左右に傾斜させることができる。この架台固定部の内周面と架台摺動部の外周面間の所定の間隙は、あまり少ないと、架台固定部に対する架台摺動部上部の天板の面の調整可能な傾斜が少なく、また、あまりに多いと、架台固定部の上部外周端部と架台摺動部の円筒外周部とを溶接する際にバックアップ材が必要になることから、架台摺動部の外周直径は架台固定部の内周直径よりも３ｍｍ程度大きくすることが好ましい。 In the independent tank installation gantry according to claim 1 and claim 2 of the present application, the gantry sliding portion is removably inserted into the gantry fixing portion with respect to the gantry fixing portion. Until the frame sliding part is welded, it is slidable.
In addition, since there is a predetermined gap between the inner peripheral surface of the gantry fixing part and the outer peripheral surface of the gantry sliding part, the top plate of the upper part of the gantry sliding part with respect to the gantry fixing part within a predetermined range. Can be tilted forward, backward, left and right. If the predetermined gap between the inner peripheral surface of the gantry fixing part and the outer peripheral surface of the gantry sliding part is too small, there is little adjustable inclination of the top plate surface of the upper part of the gantry sliding part with respect to the gantry fixing part. If the number is too large, a backup material is required when welding the upper outer peripheral edge of the gantry fixing part and the cylindrical outer periphery of the gantry sliding part. It is preferable to make it about 3 mm larger than the circumferential diameter.

そして、架台固定部の円筒部には上部が開放された複数のスリットが貫設されていて、架台固定部の上部外周端部の延長が長く取れることから、架台固定部の上部外周端部と架台摺動部の円筒外周部とを溶接したときに、強度上必要な溶接長を確保することができる。また、スリットは上部が開放されたＵ字状、Ｖ字状あるいは開放部が上向きのコ字状のいずれの形状でも良いが、上部が開放されていることから、架台固定部の外周部と架台摺動部の外周部とを溶接する場合には、下向きの姿勢で溶接が可能である。したがって、溶接の向きを考慮する必要がない場合には、スリットの形状は、上部が開放されているか否かを問わないことは勿論である。   The cylindrical part of the gantry fixing part is provided with a plurality of slits open at the top, and the upper outer peripheral end of the gantry fixing part can be extended for a long time. When the cylindrical outer peripheral portion of the gantry sliding portion is welded, a welding length necessary for strength can be ensured. The slit may be U-shaped, V-shaped with the upper part open, or U-shaped with the open part facing upward, but since the upper part is open, the outer periphery of the gantry fixing part and the gantry When welding the outer peripheral part of a sliding part, it can weld in a downward attitude | position. Therefore, when it is not necessary to consider the direction of welding, it is needless to say that the shape of the slit does not matter whether the upper part is open or not.

そして、本願請求項３および本願請求項４に係る独立タンク据付方法にあっては、船体二重底内底板上に設置される独立タンクを仮受け台で仮受けした後に、独立タンク底部に固着された耐圧断熱材の下面に架台摺動部の天板を上方向に摺動させて面接触させるため、前もって船体二重底内底板からの架台摺動部の天板の高さ等を測定する必要はなく、前工程を省略することができる。また、前述のように架台摺動部上部の天板の面は、架台固定部に対しを前後左右に傾斜させることができるため、耐圧断熱材の下面に確実に密接して面接触させることができる。   In the independent tank installation method according to claim 3 and claim 4 of the present application, the independent tank installed on the inner bottom plate of the hull double bottom is temporarily received by the temporary support stand and then fixed to the bottom of the independent tank. In order to slide the top plate of the gantry sliding part upward on the lower surface of the pressure-resistant insulation, the height of the top of the slidable sliding part from the bottom bottom plate of the hull is measured in advance. There is no need to do this, and the previous step can be omitted. In addition, as described above, the surface of the top plate at the upper part of the gantry sliding part can be tilted forward, backward, left and right with respect to the gantry fixing part, so that it can be brought into intimate contact with the lower surface of the pressure insulating material. it can.

さらに、架台摺動部の天板の上面と前記耐圧断熱材の下面に所定の厚さを有するライナを介在させることにより、架台固定部に対する架台摺動部の摺動代が限られていても、ライナの厚さを変えれば、実質的に船体二重底内底板からの架台摺動部の天板の調整可能な高さを任意に変えることができ、少ない種類の据付架台であらゆる独立タンクの据付に適用することができる。また、船体二重底内底板に対して耐圧断熱材の下面の傾斜が、架台固定部に対する架台摺動部上部の天板の面の前後左右の傾斜可能な範囲を超えている場合であっても、ライナの形状を、断面視が楔形とすることにより対応させることができる。   Furthermore, even if the sliding allowance of the gantry sliding part relative to the gantry fixing part is limited by interposing a liner having a predetermined thickness on the upper surface of the top plate of the gantry sliding part and the lower surface of the pressure-resistant heat insulating material By changing the thickness of the liner, the adjustable height of the top plate of the base sliding part from the bottom plate of the hull double bottom can be changed arbitrarily, and any independent tank with a small number of installation bases It can be applied to the installation of In addition, the inclination of the lower surface of the pressure-resistant heat insulating material with respect to the bottom plate of the hull double bottom exceeds the tiltable range of the top and bottom, left and right of the top plate surface of the gantry sliding part with respect to the gantry fixing part. However, the shape of the liner can be dealt with by making the cross-sectional view a wedge shape.

本願発明を実施するための最良の形態に係る独立タンク据付架台および独立タンク据付について図１および図２に基づいて詳細に説明する。図１は本実施例に係る独立タンク据付架台の断面図であり、図２は本実施例に係る独立タンク据付架台の独立タンク据付完了時の側面図である。   The independent tank installation stand and the independent tank installation according to the best mode for carrying out the present invention will be described in detail with reference to FIGS. FIG. 1 is a cross-sectional view of the independent tank installation stand according to this embodiment, and FIG. 2 is a side view of the independent tank installation stand according to this embodiment when the independent tank installation is completed.

まず、独立タンク据付架台について図１および図２に基づいて説明する。図１に示す符号のうち、図３および図４に記載された同一の要素については、同一の符号を付してその説明を省略する。   First, an independent tank installation stand will be described with reference to FIGS. 1 and 2. Among the reference numerals shown in FIG. 1, the same elements described in FIG. 3 and FIG.

図１において、符号１は本実施例に係る独立タンク架台、符号２は架台摺動部、符号３は架台固定部、符号６は独立タンク、符号２１は摺動円筒部、符号２２は天板、符号２３はライナ、符号３１は固定円筒部、符号３２は固定円筒部ブラケット、符号５２は二重底内底板、符号６１は耐圧断熱材、符号６２は耐圧断熱材ブラケットである。また、図２において、符号３３はＵ字状のスリットであり、符号αは摺動円筒部２１の外周面と固定円筒部３１の内周面との間隙であるが、図２においては、固定円筒部ブラケット３２はその図示が省略されている。   In FIG. 1, reference numeral 1 is an independent tank frame according to the present embodiment, reference numeral 2 is a frame sliding part, reference numeral 3 is a frame fixing part, reference numeral 6 is an independent tank, reference numeral 21 is a sliding cylindrical part, and reference numeral 22 is a top plate. Reference numeral 23 denotes a liner, reference numeral 31 denotes a fixed cylindrical part, reference numeral 32 denotes a fixed cylindrical part bracket, reference numeral 52 denotes a double bottom inner bottom plate, reference numeral 61 denotes a pressure-resistant heat insulating material, and reference numeral 62 denotes a pressure-resistant heat insulating material bracket. In FIG. 2, reference numeral 33 denotes a U-shaped slit, and reference numeral α denotes a gap between the outer peripheral surface of the sliding cylindrical portion 21 and the inner peripheral surface of the fixed cylindrical portion 31, but in FIG. The illustration of the cylindrical bracket 32 is omitted.

独立タンク架台１は、架台摺動部２と架台固定部３およびライナ２３とから構成されて、架台摺動部２は架台固定部３内に挿入されて挿脱可能となっていて、ライナ２３は架台摺動部２の天板２２に着脱自在に載置されている。そして、架台摺動部２は、摺動円筒部２１と摺動円筒部２１の上部に溶着された正方形の天板２２から構成されていて、架台固定部３は、固定円筒部３１と４個の固定円筒部ブラケット３２から構成されている。   The independent tank gantry 1 includes a gantry sliding portion 2, a gantry fixing portion 3, and a liner 23. The gantry sliding portion 2 is inserted into the gantry fixing portion 3 and can be inserted and removed. Is detachably mounted on the top plate 22 of the gantry sliding portion 2. The gantry sliding portion 2 includes a sliding cylindrical portion 21 and a square top plate 22 welded to the upper portion of the sliding cylindrical portion 21, and the gantry fixing portion 3 includes four fixed cylindrical portions 31 and four. It is comprised from the fixed cylindrical part bracket 32 of this.

本実施例において、４個の固定円筒部ブラケット３２は、固定円筒部３１の外周に沿って等間隔に、かつ、固定円筒部３１の中心部から放射状に配設され、図に示すように側面視が直角三角形の形状を呈していて、直角三角形の直角を構成する１辺が固定円筒部３１に溶着されている。この固定円筒部ブラケット３２は、固定円筒部３１を補強する役割を担うものであるから、３個以上の適当な個数とすることができる。
固定円筒部３１の下端と４個の固定円筒部ブラケット３２の下端は、１平面となるように構成されていて、架台固定部３を二重底内底板５２上に載置したときに、固定円筒部３１の下端と４個の固定円筒部ブラケット３２の下端は、二重底内底板５２に密接するようになっている。 In the present embodiment, the four fixed cylindrical portion brackets 32 are arranged at equal intervals along the outer periphery of the fixed cylindrical portion 31 and radially from the central portion of the fixed cylindrical portion 31, and as shown in the figure, The right side of the right triangle is welded to the fixed cylindrical portion 31. Since the fixed cylindrical portion bracket 32 plays a role of reinforcing the fixed cylindrical portion 31, it can be set to an appropriate number of three or more.
The lower end of the fixed cylindrical portion 31 and the lower ends of the four fixed cylindrical portion brackets 32 are configured as one plane, and are fixed when the gantry fixing portion 3 is placed on the double bottom inner bottom plate 52. The lower end of the cylindrical portion 31 and the lower ends of the four fixed cylindrical portion brackets 32 are in close contact with the double bottom inner bottom plate 52.

また、固定円筒部３１の上部には、図２に示すように、上部が開放された４つのＵ字状のスリット３３が固定円筒部３１の外周に沿って等間隔に貫設されている。前述のように、スリット３３の形状はＶ字状であっても良いが、溶接の作業性の面からは隅角部のないＵ字状が好ましい。このスリット３３は、固定円筒部３１の上部外周端部と摺動円筒部２１の内周面とを溶着する際の必要な溶接長を確保するためのものであるので、スリット３３の上下方向の長さを変えたりスリット３３の貫設箇所数を変えたりすることにより、所望の溶接長とすることができる。本実施例において、スリット３３は４つとしたが、これは、固定円筒部ブラケット３２の個数に対応するためである。   Further, as shown in FIG. 2, four U-shaped slits 33 whose upper portions are opened are provided at equal intervals along the outer periphery of the fixed cylindrical portion 31 at the upper portion of the fixed cylindrical portion 31. As described above, the shape of the slit 33 may be V-shaped, but a U-shape without a corner is preferable from the viewpoint of workability of welding. Since the slit 33 is for securing a necessary weld length when welding the upper outer peripheral end of the fixed cylindrical portion 31 and the inner peripheral surface of the sliding cylindrical portion 21, A desired welding length can be obtained by changing the length or changing the number of through-holes of the slit 33. In the present embodiment, the number of the slits 33 is four, which is to correspond to the number of the fixed cylindrical brackets 32.

つぎに、独立タンクの据付方法について、図１および図２に基づいて説明する。図１および図２の各要素に付した符号については前述したので省略する。
独立タンクの据付方法は以下の手順で行われる。すなわち、
（１）二重底内底板５２上の所定の位置に架台固定部３を設置し、架台固定部３の固定円筒部３１の下端と４個の固定円筒部ブラケット３２の下端を二重底内底板５２に溶接して固着する。
（２）架台固定部３内に架台摺動部２を挿入して、架台摺動部２の外周面から迫り出して鍔状となっている下面を固定円筒部３１の上端に当接させる。
（３）天板２２上に所定の厚さのライナ２３を載置し、天板２２に仮止めする。
（４）二重底内底板５２上に３個以上の独立タンク仮受け台（図示外）を設置する。この独立タンク仮受け台は、ジャーナルジャッキ等の油圧ジャッキを介在させて高さを微調整できるようにしておくことが好ましいが、適当な位置にある高さ調整した３個以上の独立タンク架台１を独立タンク仮受け台と兼用しても良い。
（５）独立タンク仮受け台上に独立タンク６を載置する。
（６）各々の独立タンク架台１の架台摺動部２を上方向に摺動させて、天板２２上に載置したライナ２３の上面を耐圧断熱材６１の下面に面接触させる。このときに、架台摺動部２を架台固定部３内で傾けても面接触できないほど、二重底内底板５２に対して耐圧断熱材６１の下面が傾いている場合には、天板２２上に仮止めしたライナ２３を取外して、断面視が楔形の形状のライナに変えて対処するか、独立タンク仮受け台（図示外）に介在させている油圧ジャックを微調整する。
（７）図２に示すように、固定円筒部３１の上部外周端部と摺動円筒部２１の内周面とを固定円筒部３１の上部外周端部に沿って溶接するとともに、天板２２上に仮止めしたライナ２３を本止めする。
（８）独立タンク仮受け台（図示外）に介在させている油圧ジャックを緩めて、独立タンク仮受け台を独立タンク６から離し、独立タンク仮受け台を撤去する。
以上の工程を経て、独立タンク６の据付は完了する。 Next, a method for installing the independent tank will be described with reference to FIGS. Since the reference numerals assigned to the elements in FIGS.
The method for installing the independent tank is as follows. That is,
(1) The gantry fixing portion 3 is installed at a predetermined position on the double bottom inner bottom plate 52, and the lower end of the fixed cylindrical portion 31 of the gantry fixing portion 3 and the lower ends of the four fixed cylindrical portion brackets 32 are placed in the double bottom. The bottom plate 52 is welded and fixed.
(2) The gantry sliding portion 2 is inserted into the gantry fixing portion 3, and the lower surface that protrudes from the outer peripheral surface of the gantry sliding portion 2 and has a bowl shape is brought into contact with the upper end of the fixed cylindrical portion 31.
(3) A liner 23 having a predetermined thickness is placed on the top plate 22 and temporarily fixed to the top plate 22.
(4) Three or more independent tank temporary cradles (not shown) are installed on the double bottom inner bottom plate 52. It is preferable that the height of the independent tank temporary cradle can be finely adjusted by interposing a hydraulic jack such as a journal jack. However, three or more independent tank stands 1 adjusted in height at appropriate positions. May also be used as an independent tank temporary cradle.
(5) The independent tank 6 is placed on the independent tank provisional cradle.
(6) The platform sliding portion 2 of each independent tank platform 1 is slid upward to bring the upper surface of the liner 23 placed on the top plate 22 into surface contact with the lower surface of the pressure-resistant heat insulating material 61. At this time, when the lower surface of the pressure-resistant heat insulating material 61 is inclined with respect to the double bottom inner bottom plate 52 such that even if the gantry sliding portion 2 is tilted within the gantry fixing portion 3, the top plate 22 is inclined. Remove the liner 23 temporarily fixed above, and change the cross-sectional view to a wedge-shaped liner, or finely adjust the hydraulic jack interposed in the independent tank temporary support (not shown).
(7) As shown in FIG. 2, the upper outer peripheral end of the fixed cylindrical portion 31 and the inner peripheral surface of the sliding cylindrical portion 21 are welded along the upper outer peripheral end of the fixed cylindrical portion 31, and the top plate 22. The liner 23 temporarily fixed above is permanently fixed.
(8) Loosen the hydraulic jack intervening in the independent tank temporary cradle (not shown), move the independent tank temporary cradle away from the independent tank 6 and remove the independent tank temporary cradle.
Through the above steps, the installation of the independent tank 6 is completed.

なお、前述のように独立タンク架台１は、架台摺動部２と架台固定部３とから構成されているが、架台固定部３の下端にベースプレートを溶着して独立タンク架台１の構成要素としても良い。この場合、上記手順（１）においては、前記ベースプレートを二重底内底板５２に溶着するか、二重底内底板５２に溶着したスタッドボルトを介して前記ベースプレートを二重底内底板５２に螺着させることもできる。   As described above, the independent tank gantry 1 includes the gantry sliding portion 2 and the gantry fixing portion 3, but a base plate is welded to the lower end of the gantry fixing portion 3 as a component of the independent tank gantry 1. Also good. In this case, in the procedure (1), the base plate is welded to the double bottom inner bottom plate 52 or the base plate is screwed to the double bottom inner bottom plate 52 via a stud bolt welded to the double bottom inner bottom plate 52. It can also be worn.

図１は、本実施例に係る独立タンク据付架台の断面図である。FIG. 1 is a cross-sectional view of an independent tank installation base according to the present embodiment. 図２は、本実施例に係る独立タンク据付架台の独立タンク据付完了時の側面図である。FIG. 2 is a side view of the independent tank installation stand according to the present embodiment when the independent tank installation is completed. 図３は、ケミカル運搬船の縦断面の模式図である。FIG. 3 is a schematic view of a longitudinal section of a chemical carrier. 図４は、従来例における独立タンク据付架台の正面図である。FIG. 4 is a front view of an independent tank mounting base in a conventional example. 図５は、図５は特開昭６１−８１２８９号公報に記載の第１図に相当する図である。FIG. 5 is a view corresponding to FIG. 1 described in JP-A-61-81289.

符号の説明Explanation of symbols

１ 独立タンク架台
２ 架台摺動部
３ 架台固定部
４ 従来例の独立タンク架台
５ ケミカル運搬船
６ 独立タンク
２１ 摺動円筒部
２２ 天板
２３ ライナ
３１ 固定円筒部
５１ 船倉
５２ 二重底内底板
６１ 耐圧断熱材 DESCRIPTION OF SYMBOLS 1 Independent tank base 2 Base sliding part 3 Base fixing part 4 Conventional independent tank base 5 Chemical carrier 6 Independent tank 21 Sliding cylindrical part 22 Top plate 23 Liner 31 Fixed cylindrical part 51 Hanger 52 Double bottom inner bottom board 61 Pressure resistance Insulation

Claims (4)

船体二重底内底板上に複数個配設される独立タンク据付架台であって、
前記据付架台は、
前記二重底内底板上に固着され上部が開放された鋼製の円筒状架台固定部と、
前記架台固定部内に挿脱可能に挿着され上部に天板が溶着された鋼製の円筒状架台摺動部からなり、
前記架台固定部の内周面と前記架台摺動部の外周面間には所定の間隙を有していることを特徴とする独立タンク据付架台。 A plurality of independent tank installation stands disposed on the bottom plate of the hull double bottom,
The installation stand is
A steel cylindrical gantry fixing part fixed on the double bottom inner bottom plate and having an open top,
It consists of a steel-made cylindrical gantry sliding part, which is removably inserted into the gantry fixing part and the top plate is welded to the upper part,
An independent tank installation gantry comprising a predetermined gap between an inner peripheral surface of the gantry fixing portion and an outer peripheral surface of the gantry sliding portion. 前記架台固定部の円筒部には上部が開放された複数のスリットが貫設されていることを特徴とする請求項１に記載の独立タンク据付架台。   2. The independent tank installation stand according to claim 1, wherein a plurality of slits whose upper portions are open are provided through the cylindrical portion of the stand fixing portion. 船体二重底内底板上に設置される独立タンクを仮受け台で仮受けし、
前記独立タンク底部に前記据付架台に対向する位置に固着された耐圧断熱材の下面に前記架台摺動部の前記天板を上方向に摺動させて面接触させ、
前記架台固定部の上部外周端部と前記架台摺動部の円筒外周部とを溶着し、
その後、前記仮受け台を撤去することにより前記独立タンクを設置することを特徴とする独立タンク据付方法。 Temporarily receiving an independent tank installed on the bottom plate of the hull double bottom with a temporary cradle,
Sliding the top plate of the gantry sliding part upwards on the lower surface of the pressure-resistant heat insulating material fixed to the bottom of the independent tank at a position facing the installation gantry;
Welding the upper peripheral end of the gantry fixing part and the cylindrical outer peripheral part of the gantry sliding part;
Thereafter, the independent tank is installed by removing the temporary cradle. 前記架台摺動部の前記天板の上面と前記耐圧断熱材の下面に所定の厚さを有するライナを介在させたことを特徴とする請求項３に記載の独立タンク据付方法。   The independent tank installation method according to claim 3, wherein a liner having a predetermined thickness is interposed between the upper surface of the top plate and the lower surface of the pressure-resistant heat insulating material of the gantry sliding portion.
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