JP3977188B2

JP3977188B2 - Sea Elephant Reproduction Tank

Info

Publication number: JP3977188B2
Application number: JP2002224675A
Authority: JP
Inventors: 毅池谷; 浩二岩瀬; 正志望月; 隆川口
Original assignee: Kajima Corp; Mitsui Engineering and Shipbuilding Co Ltd; Mitsui E&S Holdings Co Ltd
Current assignee: Kajima Corp; Mitsui Engineering and Shipbuilding Co Ltd; Mitsui E&S Holdings Co Ltd
Priority date: 2002-08-01
Filing date: 2002-08-01
Publication date: 2007-09-19
Anticipated expiration: 2022-08-01
Also published as: JP2004069312A

Description

【０００１】
【発明の属する技術分野】
本発明は、海象再現水槽に関するものである。
【０００２】
【従来の技術】
新形式海洋構造物や新形式海岸構造物の性能評価と開発を行う際には、実験水槽内で水理模型実験を行い、計画、設計、施工の上での問題点を実証的に解決する必要がある。従来、水路や水槽にて定常流を発生させる装置には、ポンプを用いて水を一定方向に循環させるものがある。また、波を発生させる装置には、造波板等を運動させたり、空気圧室内の空気圧を増減させることにより、水面を上下動させるものがある。さらに、造波板と還流装置を併用し、波と一定方向の流を同時に発生させる波・流れ装置がある。
【０００３】
【発明が解決しようとする課題】
しかしながら、従来の技術では、以下の▲１▼から▲５▼のような問題点があった。▲１▼高い精度で実海域の波と流れの場を室内に再現することができなかった。▲２▼実海域の波と流れの場を室内に忠実に再現させるためには、大規模な装置や設備が必要となり、実験の費用が非常に高いものとなった。▲３▼実海域の波と流れの場を忠実に再現するには、装置や施設を製作・更新するのに非常に長い期間を要するばかりでなく、実験の効率が悪いため、実験期間もかなり長くならざるを得なかった。
【０００４】
▲４▼大規模な施設・装置であるため、製作上や実験実施上、安全面で難点があった。▲５▼大規模な施設・装置であるため、消費電力や材料も多くなり、環境面でも難点があった。
【０００５】
本発明は、このような問題に鑑みてなされたもので、その目的とするところは、海域に生じる波と流れの場を室内水槽内で忠実に再現できる海象再現水槽を、安価で、短期間に、しかも安全に提供することにある。
【０００６】
【課題を解決するための手段】
前述した目的を達成するために本発明は、水が満たされた供用水槽と、水が満たされた貯水槽と、前記供用水槽の周囲に設けられ、水が回流する回流部と、前記回流部と前記供用水槽との間に設けられた開閉可能な複数の水路と、前記貯水槽と前記供用水槽および前記回流部との間に設けられた水流発生部とを具備することを特徴とする海象再現水槽である。
【０００７】
供用水槽および貯水槽は、例えば、水槽の内部に槽内を２つに分ける第１の仕切りを固定して形成される。供用水槽は、実験槽として用いることもできる。供用水槽および回流部は、水槽の内部に第２の仕切りを固定する等の方法で形成される。例えば、水槽の外周を二重仕切りとして、内側の仕切りの内部を供用水槽、２枚の仕切りの間を回流部として使用することができる。
【０００８】
水路は、例えば、回流部と供用水槽との仕切りに設けられた複数の開口部である。開口部にはそれぞれ出入りする流量が可変になる機器が設けられ、それらの機器は個々に制御される。複数の開口部を出入りする流量を個別に制御することにより、開口部を介して供用水槽と回流部との間で水の移動が起こり、供用水槽内に任意の方向の流れを発生させることができる。
【０００９】
回流部は、周方向の水流を遮断するような仕切りによって、２つの部分に分割される。２つの回流部のうち、一方は貯水槽に直接連結され、他方は水流発生部を介して貯水槽に連結される。
【００１０】
水流発生部では、例えば、貯水槽と供用水槽とが主管で連結され、貯水槽と回流部とが主管から分岐した枝管で連結される。主管には貯水槽と水槽との間の水流を制御するバルブが、枝管には貯水槽と回流部との間の水流を制御するバルブが設けられる。また、主管には、貯水槽と供用水槽との間、および、貯水槽と回流部との間に水流を発生させる水流発生装置が設けられる。
【００１１】
水流発生部では、主管に設けられたバルブ、枝管に設けられたバルブの開閉をそれぞれ制御して、主管に設けられた水流発生装置を作動させ、貯水槽と供用水槽との間、貯水槽と回流部との間に水流を発生させる。
【００１２】
供用水槽内には、さらに造波装置を設けてもよい。造波装置には、例えば、多方向不規則波造波装置を使用する。水槽内を供用水槽と貯水槽とに分割する仕切りを、造波装置の導波板として用いることもできる。また、仕切りを造波装置の反射板として使用することもできる。さらには、造波板列を仕切りとして用いてもよい。
【００１３】
本発明では、水が満たされた供用水槽の周囲に水が回流する回流部を形成し、回流部と供用水槽との間に出入りする流量の調節が可能な複数の水路を設ける。また、水が満たされた貯水槽と、供用水槽および回流部との間に水流発生部を設ける。さらに、必要に応じて、供用水槽内に造波装置を設ける。
【００１４】
回流部と供用水槽との間に設けられた複数の水路をそれぞれ開閉した後、水流発生部を用いて、貯水槽と供用水槽との間、または、貯水槽と回流部との間に、水流を発生させる。回流部と供用水槽との間の水の移動方向と、水流発生部からの水流の方向とを制御することにより、供用水槽内に任意の方向の流れと、長周期波を発生させることができる。さらに、造波装置を併用することにより、水槽内に任意の方向の波を発生させることができる。
【００１５】
【発明の実施の形態】
以下、図面に基づいて、本発明の実施例を詳細に説明する。図１は、海象再現水槽１の平面図、図２は、海象再現水槽１の断面立面図を示す。図２は、図１のＸ−Ｘによる断面図である。図１に示すように、海象再現水槽１は、水槽３内に設けられた貯水槽９と供用水槽２５、水流発生部２７、回流部３５、開口部２３、多方向不規則波造波装置１７等で構成される。
【００１６】
図１、図２に示すように、水槽３は、底面７に側面５ａ、側面５ｂ、側面５ｃ、側面５ｄが設けられた直方体形状であり、内部に水が満たされる。水槽３には、水槽３の短辺方向の側面５ｄと平行に、第１の仕切りである仕切り１５が設置される。仕切り１５は、不透水性で、側方からの水圧に耐えられる部材である。仕切り１５は、下端が底面７に接触し、一端が曲折して側壁５ｄに接触し、他端が側面５ａと平行に設けられた仕切り２１ａに接触するように設置される。仕切り１５は、水槽３内に貯水槽９を形成する。
【００１７】
水槽３のうち、貯水槽９以外の部分の外周付近には、第２の仕切りである仕切り２１が設置される。仕切り２１は、側面５ａと平行な仕切り２１ａ、側面５ｃと平行な仕切り２１ｃ、側面５ｂと平行な仕切り２１ｂからなる。仕切り２１ａ、仕切り２１ｂ、仕切り２１ｃは、不透水性で、側方からの水圧に耐えられる部材である。
【００１８】
仕切り２１ａは、一端が仕切り１５に接触し、他端が仕切り２１ｃに接触し、下端が底面７に接触するように設置される。仕切り２１ｃは、一端が仕切り２１ａに接触し、他端が仕切り２１ｂに接触し、下端が底面７に接触するように設置される。仕切り２１ｂは、一端が仕切り２１ｃに接触し、他端が仕切り１５を貫通して設置された水流発生部２７に接触し、下端が底面７に接触するように設置される。
【００１９】
仕切り２１は、水槽３内に供用水槽２５と回流部３５とを形成する。供用水槽２５は、仕切り２１に囲まれた部分であり、回流部３５は、仕切り２１と側面５ａ、側面５ｃ、側面５ｂとに挟まれた部分である。回流部３５は、仕切り２１ａと側面５ａとの間の回流部３５ａ、仕切り２１ｃと側面５ｃとの間の回流部３５ｃ、仕切り２１ｂと側面５ｂとの間の回流部３５ｂからなる。回流部３５ａと回流部３５ｃとは連続しているが、回流部３５ｃと回流部３５ｂとの間には仕切り４３が設けられ、水流が遮断される。
【００２０】
仕切り２１には、開口部２３が設けられる。開口部２３ａは仕切り２１ａに、開口部２３ｂは仕切り２１ｂに、開口部２３ｃは仕切り２１ｃに設けられた開口部２３である。図３は、開口部２３付近の拡大立面図、図４は、開口部２３付近の断面立面図である。図４は、図３のＺ−Ｚによる断面図を示す。
【００２１】
図３、図４に示すように、開口部２３では、仕切り２１に流量制御装置２４が設置される。流量制御装置２４は、例えば上下方向に移動可能であり、流量制御装置２４を稼動させることで、仕切り２１に開口２６が形成される。開口２６は、供用水槽２５と回流部３５との間の水路として用いられる。複数の開口部２３を出入りする流量は、個別に制御することができる。個々の開口部２３の開閉状態、開口率等は、発生させたい流れ、波に合わせて決定される。
【００２２】
図２に示すように、仕切り１５には、仕切り１５を貫通するように、複数の水流発生部２７が設置される。水流発生部２７は、図１に示すように、水槽３の長辺方向の側面５ａ、５ｂと平行に配置された主管３０と、主管３０から枝分かれした枝管３２、主管３０に設置された水流発生装置２９とバルブ３３、枝管３２に設置されたバルブ３１等で構成される。水流発生装置２９は、主管３０と枝管３２との分岐部より貯水槽９側に設置され、バルブ３３は、主管３０と枝管３２との分岐部より供用水槽２５側に設置される。
【００２３】
主管３０の貯水槽９側の端部には、吸排口３７が設けられる。主管３０の他方の端部には吸排口４１が設けられ、吸排口４１付近には多方向不規則波造波装置１７が設置される。多方向不規則波造波装置１７は、供用水槽２５側の鉛直面に造波板１９を有する。
【００２４】
多方向不規則波造波装置１７は、供用水槽２５と貯水槽９との間に、回流部３５ｂに連続する緩衝槽４５を形成する。緩衝槽４５に配置された枝管３２の端部には、吸排口３９が設けられる。主管３０、枝管３２、吸排口３７、吸排口３９、吸排口４１は、水流の圧力に耐えられる材質とし、流量や設置数は、供用水槽２５の大きさ等によって決定する。
【００２５】
水流発生部２７では、主管３０に設置されたバルブ３３を開け、枝管３２に設置されたバルブ３２を閉めることにより、貯水槽９と供用水槽２５との間で水の移動が可能となる。
【００２６】
また、主管３０に設置されたバルブ３３を閉め、枝管３２に設置されたバルブ３２を開けることにより、緩衝槽４５を介して貯水槽９と回流部３５ｂとの間での水の移動が可能となる。
【００２７】
水流発生装置２９は、貯水槽９と供用水槽２５との間、または、緩衝槽４５を介して貯水槽９と回流部３５ｂとの間で、正逆方向の水流を発生させる機能を有する。水流発生装置２９は、例えば、軸流ポンプ等のポンプ及びスラスタである。水流発生装置２９を駆動させるモータ（図示せず）、開口部２３の流量制御装置２４、バルブ３１、バルブ３３は、例えば、コンピュータ（図示せず）を用いて制御される。
【００２８】
供用水槽２５内では、底面７が、底面７ａまで、２０ｃｍ程度かさ上げされる。また、実験模型を形成するための砂ピット１３が設けられる。貯水槽９の側面５ｄには、消波装置１１が設けられる。消波装置１１は、複数の長方形の板から成る。それぞれの板は、長辺の一辺が側面５ｄに接触し、短辺が側面５ａおよび側面５ｂに接触し、側面５ｄから底面７の方向に傾斜するように、平行に設置される。消波装置１１は、水流発生部２７からの水流により発生した波が、側面５ｄを越えて水槽３の外部に流出するのを防ぐ。
【００２９】
次に海象再現水槽１の動作について説明する。海象再現水槽１で波、流れを再現する際には、まず、発生させたい流れの方向に合わせて、仕切り２１に設けられた複数の開口部２３の開閉状態と、水流発生部２７の主管３０に設けられたバルブ３３および枝管に設けられたバルブ３１の開閉状態と、水流発生装置２９の運転方向を決定する。
【００３０】
また、発生させたい流れの強さに合わせて、水流発生部２７の水流発生装置２９を駆動させるモータ（図示せず）の回転方向や回転数、バルブ３１、バルブ３３の流量、開口部２３の流量制御装置２４の開口率等を決定する。
【００３１】
そして、開口部２３の流量制御装置２４（図３、図４）を制御して、複数の開口部２３をそれぞれ開状態または閉状態とする。次に、主管３０に設けられたバルブ３３と枝管に設けられたバルブ３１を、開状態または閉状態とする。さらに、水流発生装置２９の運転を開始する。
【００３２】
バルブ３１を閉状態、バルブ３３を開状態として水流発生装置２９を運転すると、水流発生装置２９の運転方向により、供用水槽２５から貯水槽９へ、または貯水槽９から供用水槽２５へ水が移動する。また、バルブ３３を閉状態、バルブ３１を開状態として水流発生装置２９を運転すると、水流発生装置２９の運転方向により、緩衝槽４５から貯水槽９へ、または、貯水槽９から緩衝槽４５へ水が移動する。
【００３３】
このとき、開口部２３ａが開状態であれば、供用水槽２５と回流部３５ａとの間で水が移動する。開口部２３ｂが開状態であれば、供用水槽２５と回流部３５ｂとの間で水が移動し、開口部２３ｃが開状態であれば、供用水槽２５と回流部３５ｃとの間で水が移動する。
【００３４】
水の流れが定常となり、目標とする水流の方向、強さが得られた後、多方向不規則波造波装置１７の運転を開始する。
【００３５】
以下に、海象再現水槽１を用いて図１の矢印Ａ、矢印Ｂに示す各方向に波、流れを発生させる場合について、図５のフローチャートに沿って、それぞれ説明する。図５は、図１の矢印Ａまたは矢印Ｂに示す方向の流れを発生させる方法のフローチャートを、図６は、矢印Ａに示す方向の流れ発生時の海象再現水槽１の平面図を、図７は、矢印Ｂに示す方向の流れ発生時の海象再現水槽１の平面図を示す。
【００３６】
図１、図６に示す矢印Ａの方向の流れを発生させるには、まず、図６に示すように、開口部２３ａ、開口部２３ｂを閉め、開口部２３ｃを開けて（ステップ１０１）、仕切り２１ｃのみに開口２６を設ける。そして、水流発生部２７で、枝管３２に設けられたバルブ３１を閉め（ステップ１０２）、主管３０に設けられたバルブ３３を開ける（ステップ１０３）。さらに、貯水槽９から供用水槽２５への水流が起こるように水流発生装置２９を運転する（ステップ１０４）。
【００３７】
水流発生装置２９の駆動により、水流発生部２７付近では、貯水槽９内の水が吸排口３７から吸入され、主管３０を通って、吸排口４１から供用水槽２５内に排出される。仕切り２１ｃ付近では、供用水槽２５内の水が、開口部２３ｃの開口２６を介して回流部３５ｃに流入する。回流部３５ｃに流入した水は、回流部３５ａを通って貯水槽９内に戻る。すなわち、水槽３内で、図６の矢印Ｆに示す方向の水流が発生する。
【００３８】
図１、図７に示す矢印Ｂの方向の流れを発生させるには、まず、図７に示すように、開口部２３ａ、開口部２３ｂを閉め、開口部２３ｃを開けて（ステップ１０１）、仕切り２１ｃのみに開口２６を設ける。そして、水流発生部２７で、枝管３２に設けられたバルブ３１を閉め（ステップ１０２）、主管３０に設けられたバルブ３３を開ける（ステップ１０３）。さらに、供用水槽２５から貯水槽９への水流が起こるように水流発生装置２９を運転する（ステップ１０４）。
【００３９】
水流発生装置２９の駆動により、水流発生部２７付近では、供用水槽２５内の水が吸排口４１から吸入され、主管３０を通って、吸排口３７から貯水槽９内に排出される。貯水槽９内に流入した水は、回流部３５ａを通って回流部３５ｃに達する。仕切り２１ｃ付近では、回流部３５ｃ内の水が、開口部２３ｃの開口２６を介して供用水槽２５に流入する。すなわち、水槽３内で、図７の矢印Ｇに示す方向の水流が発生する。
【００４０】
次に、海象再現水槽１を用いて図１の矢印Ｃ、矢印Ｄに示す各方向に流れを発生させる場合について、図８のフローチャートに沿って、それぞれ説明する。図８は、図１の矢印Ｃまたは矢印Ｄに示す方向の流れを発生させる方法のフローチャートを、図９は、矢印Ｃに示す方向の流れ発生時の海象再現水槽１の平面図を、図１０は、矢印Ｄに示す方向の流れ発生時の海象再現水槽１の平面図を示す。
【００４１】
図１、図９に示す矢印Ｃの方向の流れを発生させるには、まず、図９に示すように、開口部２３ａ、開口部２３ｂを開け、開口部２３ｃを閉めて（ステップ２０１）、仕切り２１ａと仕切り２１ｂに開口２６を設ける。そして、水流発生部２７で、主管３０に設けられたバルブ３３を閉め（ステップ２０２）、枝管３２に設けられたバルブ３１を開ける（ステップ２０３）。さらに、貯水槽９から緩衝槽４５への水流が起こるように水流発生装置２９を運転する（ステップ２０４）。
【００４２】
水流発生装置２９の駆動により、水流発生部２７付近では、貯水槽９内の水が吸排口３７から吸入され、主管３０と枝管３２を通って、吸排口３９から緩衝槽４５内に排出される。緩衝槽４５に流入した水は、回流部３５ｂに達する。仕切り２１ｂ付近では、回流部３５ｂ内の水が、開口部２３ｂの開口２６を介して供用水槽２５内に流入する。また、仕切り２１ａ付近では、供用水槽２５内の水が、開口部２３ａの開口２６を介して回流部３５ａに流入する。回流部３５ａに流入した水は、貯水槽９内に戻る。すなわち、水槽３内で、図９の矢印Ｈに示す方向の水流が発生する。
【００４３】
図１、図１０に示す矢印Ｄの方向の流れを発生させるには、まず、図１０に示すように、開口部２３ａ、開口部２３ｂを開け、開口部２３ｃを閉めて（ステップ２０１）、仕切り２１ａと仕切り２１ｂに開口２６を設ける。そして、水流発生部２７で、主管３０に設けられたバルブ３３を閉め（ステップ２０２）、枝管３２に設けられたバルブ３１を開ける（ステップ２０３）。さらに、緩衝槽４５から貯水槽９への水流が起こるように水流発生装置２９を運転する（ステップ２０４）。
【００４４】
水流発生装置２９の駆動により、水流発生部２７付近では、緩衝槽４５内の水が吸排口３９から吸入され、枝管３２と主管３０を通って、吸排口３７から貯水槽９内に排出される。貯水槽９に流入した水は、回流部３５ａに達する。仕切り２１ａ付近では、回流部３５ａ内の水が、開口部２３ａの開口２６を介して供用水槽２５内に流入する。また、仕切り２１ｂ付近では、供用水槽２５内の水が、開口部２３ｂの開口２６を介して回流部３５ｂに流入する。回流部３５ｂに流入した水は、緩衝槽４５内に戻る。すなわち、水槽３内で、図１０の矢印Ｉに示す方向の水流が発生する。
【００４５】
次に、海象再現水槽１を用いて図１の矢印Ｅに示す方向に流れを発生させる場合について、図１１のフローチャートに沿って説明する。図１１は、図１の矢印Ｅに示す方向の流れを発生させる方法のフローチャートを、図１２は、矢印Ｅに示す方向の流れ発生時の海象再現水槽１の平面図を示す。
【００４６】
図１、図１２に示す矢印Ｅの方向の波、流れを発生させるには、まず、図１２に示すように、開口部２３ａ、開口部２３ｂ、開口部２３ｃを閉めて（ステップ３０１）、仕切り２１に開口を設けない。そして、水流発生部２７で、枝管３２に設けられたバルブ３１を閉め（ステップ３０２）、主管３０に設けられたバルブ３３を開ける（ステップ３０３）。さらに、貯水槽９から供用水槽２５への水流と供用水槽２５から貯水槽９への水流が交互に起こるように水流発生装置２９を運転する（ステップ３０４）。
【００４７】
水流発生装置２９の駆動により、水流発生部２７付近では、貯水槽９内の水が吸排口３７から吸入され、主管３０を通って吸排口４１から供用水槽２５内に排出される状態と、供用水槽２５内の水が吸排口４１から吸入され、主管３０を通って吸排口３７から貯水槽９内に排出される状態とが交互に発生する。すなわち、水槽３内で、図１２の矢印Ｊに示す方向の水流が発生する。
【００４８】
矢印Ｊに示すような正逆方向の流れを発生させることにより、供用水槽２５内には、矢印Ｅに示す方向に、長周期の波である津波４９（図２）が発生する。
【００４９】
このように、本実施の形態では、供用水槽２５の周囲に回流部３５を設け、水流発生部７を用いて、貯水槽９と供用水槽２５との間や、貯水槽９と回流部３５との間で往復方向の水流を発生させる。また、供用水槽２５と回流部３５との間に、水路として複数の開口部２３を設ける。複数の開口部２３を出入りする流量は個別に制御でき、供用水槽２５と回流部３５との間では、開口部２３を介しての水の移動が可能である。
【００５０】
貯水槽９と供用水槽２５、または、貯水槽９と回流部３５との間の水流の方向と、供用水槽２５と回流部３５との間の開口２６の位置を制御することにより、供用水槽２５内に任意の方向の水流や長周期の波を発生させることができる。また、水流発生装置２９やバルブ３１、バルブ３３の流量、開口部２３の開口率等を調整することにより、水流の強さを変化させることができる。
【００５１】
さらに、水槽３内に多方向不規則波造波装置１７を設け、多方向不規則波造波装置１７を用いて風波を発生させることにより、任意の方向の水流と波とを同時に発生させることができる。
【００５２】
供用水槽２５内に、実際の海域での波、流れの場、例えば、多方向不規則波（風波）と潮汐（潮位変動）、潮流（流速と方向）、津波（超長周期波）、沿岸流（岸に沿った流れ）、岸方向流れ、沖方向流れ等を同時に発生させて水理模型実験を行うことで、防波堤や港湾施設、海洋構造物等の計画、設計、施工の上での問題点を実証的に解決することができ、合理的な設計、施工が可能となる。
【００５３】
なお、本実施の形態では、貯水槽９と供用水槽２５、および、貯水槽９と緩衝槽４５を、１つの水流発生部２７で連結したが、貯水槽９と供用水槽２５を連結する水流発生部と、貯水槽９と緩衝槽４５とを連結する水流発生部とを別々に設け、それぞれにバルブと水流発生装置を設置してもよい。
【００５４】
また、本実施の形態では、貯水槽９、供用水槽２５、回流部３５を、直方体形状の水槽３内に仕切り１５と仕切り２１とを設置して形成したが、これらを個別に設けてもよい。その場合、貯水槽と供用水槽、貯水槽と回流部との間を他の形状の水流発生部で連結し、供用水槽と回流部との間には、他の形式の開閉可能な水路を設置する。
【００５５】
【発明の効果】
以上、詳細に説明したように、本発明によれば、海域に生じる波と流れの場を水槽内で忠実に再現できる海象再現水槽を、安価で、短期間に、しかも安全に提供できる。
【図面の簡単な説明】
【図１】海象再現水槽１の平面図
【図２】海象再現水槽１の断面立面図
【図３】開口部２３付近の拡大立面図
【図４】開口部２３付近の断面立面図
【図５】図１の矢印Ａまたは矢印Ｂに示す方向の流れを発生させる方法のフローチャート
【図６】矢印Ａに示す方向の流れ発生時の海象再現水槽１の平面図
【図７】矢印Ｂに示す方向の流れ発生時の海象再現水槽１の平面図
【図８】図１の矢印Ｃまたは矢印Ｄに示す方向の流れを発生させる方法のフローチャート
【図９】矢印Ｃに示す方向の流れ発生時の海象再現水槽１の平面図
【図１０】矢印Ｄに示す方向の流れ発生時の海象再現水槽１の平面図
【図１１】図１の矢印Ｅに示す方向の流れを発生させる方法のフローチャート
【図１２】矢印Ｅに示す方向の流れ発生時の海象再現水槽１の平面図
【符号の説明】
１………海象再現水槽
３………水槽
９………貯水槽
１５、２１、２１ａ、２１ｂ、２１ｃ………仕切り
１７………多方向不規則波造波装置
２３…、２３ａ、２３ｂ、２３ｃ………開口部
２４………流量制御装置
２５………供用水槽
２６………開口
２７………水流発生部
２９………水流発生装置
３０………主管
３１、３３………バルブ
３２………枝管
３５、３５ａ、３５ｂ、３５ｃ………回流部
４３………仕切り
４５………緩衝槽[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an oceanographic reproduction tank.
[0002]
[Prior art]
When conducting performance evaluation and development of new-type offshore structures and new-type coastal structures, conduct hydraulic model experiments in experimental tanks to empirically solve problems in planning, design, and construction There is a need. 2. Description of the Related Art Conventionally, there are devices that generate a steady flow in a water channel or a water tank using a pump to circulate water in a certain direction. Some devices for generating waves move the water surface up and down by moving a wave-making plate or the like or increasing or decreasing the air pressure in the air pressure chamber. Furthermore, there is a wave / flow device that uses a wave-making plate and a reflux device in combination to simultaneously generate waves and a flow in a certain direction.
[0003]
[Problems to be solved by the invention]
However, the conventional techniques have the following problems (1) to (5). (1) It was not possible to reproduce the waves and flow fields in the actual sea area indoors with high accuracy. (2) In order to faithfully reproduce the wave and flow field in the actual sea area, large-scale equipment and facilities were required, and the cost of the experiment became very high. (3) In order to faithfully reproduce the wave and flow field in the actual sea area, not only does it take a very long period of time to manufacture and update the equipment and facilities, but also the experimental period is rather long. I had to be long.
[0004]
(4) Since it is a large-scale facility / equipment, there were difficulties in terms of safety in manufacturing and conducting experiments. (5) Since it is a large-scale facility / equipment, it consumes more power and materials, and there are also environmental problems.
[0005]
The present invention has been made in view of such problems, and the object of the present invention is to provide a sea state reproduction aquarium that can faithfully reproduce the wave and flow fields generated in the sea area within the indoor aquarium at a low cost and in a short period of time. In addition, it is to provide safely.
[0006]
[Means for Solving the Problems]
In order to achieve the above-described object, the present invention provides an in-service water tank filled with water, a water-filled water tank, a circulating part provided around the in-service water tank and circulating water, and the circulating part And a plurality of openable and closable water channels provided between the water tank and the service water tank, and a water flow generation unit provided between the water storage tank, the service water tank, and the circulation part. This is a reproduction tank.
[0007]
The in-service water tank and the water storage tank are formed, for example, by fixing a first partition that divides the inside of the tank into two inside the water tank. An in-service water tank can also be used as an experimental tank. An in-service water tank and a circulation part are formed by methods, such as fixing a 2nd partition in the inside of a water tank. For example, the outer periphery of the water tank can be used as a double partition, and the inside of the inner partition can be used as a service water tank between two partitions.
[0008]
The water channel is, for example, a plurality of openings provided in a partition between the circulation portion and the service water tank. The opening is provided with devices that can change the flow rate of incoming and outgoing, and these devices are individually controlled. By individually controlling the flow rate of entering and exiting the plurality of openings, water can move between the service water tank and the circulating part through the openings, and a flow in an arbitrary direction can be generated in the service water tank. it can.
[0009]
The circulating part is divided into two parts by a partition that blocks the circumferential water flow. One of the two circulation units is directly connected to the water storage tank, and the other is connected to the water storage tank via the water flow generation unit.
[0010]
In the water flow generation unit, for example, the water storage tank and the service water tank are connected by a main pipe, and the water storage tank and the circulation part are connected by a branch pipe branched from the main pipe. The main pipe is provided with a valve for controlling the water flow between the water tank and the branch pipe, and the branch pipe is provided with a valve for controlling the water flow between the water tank and the circulating portion. The main pipe is provided with a water flow generator that generates a water flow between the water storage tank and the service water tank and between the water storage tank and the circulating portion.
[0011]
In the water flow generation unit, the valve provided in the main pipe and the valve provided in the branch pipe are controlled to open and close to operate the water flow generation device provided in the main pipe, and the water tank between the water tank and the service water tank A water flow is generated between the water and the circulation part.
[0012]
A wave generator may be further provided in the service water tank. As the wave making device, for example, a multidirectional irregular wave making device is used. The partition which divides the inside of a water tank into a service water tank and a water tank can also be used as a waveguide plate of a wave making device. Moreover, a partition can also be used as a reflecting plate of a wave making device. Furthermore, a wave plate array may be used as a partition.
[0013]
In the present invention, a circulating portion where water circulates is formed around an in-service water tank filled with water, and a plurality of water channels capable of adjusting the flow rate entering and exiting between the circulating portion and the in-service water tank are provided. Moreover, a water flow generation | occurrence | production part is provided between the water tank filled with water, a service water tank, and a circulation part. Furthermore, if necessary, a wave making device is provided in the service tank.
[0014]
After opening and closing each of the plurality of water channels provided between the circulation unit and the service tank, the water flow is generated between the storage tank and the service tank or between the storage tank and the circulation unit using the water flow generation unit. Is generated. By controlling the direction of water movement between the circulating section and the service tank and the direction of the water flow from the water generation section, it is possible to generate a flow in an arbitrary direction and a long-period wave in the service tank. . Furthermore, by using the wave generator together, waves in an arbitrary direction can be generated in the water tank.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of the sea state reproduction tank 1, and FIG. 2 is a sectional elevation view of the sea state reproduction tank 1. 2 is a cross-sectional view taken along the line XX of FIG. As shown in FIG. 1, the oceanographic reproduction aquarium 1 includes a water tank 9 and a service tank 25 provided in the water tank 3, a water flow generation unit 27, a circulation unit 35, an opening 23, and a multidirectional irregular wave generator 17. Etc.
[0016]
As shown in FIGS. 1 and 2, the water tank 3 has a rectangular parallelepiped shape in which a bottom surface 7 is provided with a side surface 5a, a side surface 5b, a side surface 5c, and a side surface 5d, and the inside is filled with water. A partition 15 that is a first partition is installed in the water tank 3 in parallel with the side surface 5 d in the short side direction of the water tank 3. The partition 15 is a member that is impermeable and can withstand water pressure from the side. The partition 15 is installed such that the lower end is in contact with the bottom surface 7, one end is bent to contact the side wall 5d, and the other end is in contact with the partition 21a provided in parallel with the side surface 5a. The partition 15 forms a water storage tank 9 in the water tank 3.
[0017]
A partition 21, which is a second partition, is installed near the outer periphery of the water tank 3 other than the water tank 9. The partition 21 includes a partition 21a parallel to the side surface 5a, a partition 21c parallel to the side surface 5c, and a partition 21b parallel to the side surface 5b. The partition 21a, the partition 21b, and the partition 21c are members that are impermeable and can withstand water pressure from the side.
[0018]
The partition 21 a is installed such that one end is in contact with the partition 15, the other end is in contact with the partition 21 c, and the lower end is in contact with the bottom surface 7. The partition 21c is installed so that one end contacts the partition 21a, the other end contacts the partition 21b, and the lower end contacts the bottom surface 7. One end of the partition 21 b is in contact with the partition 21 c, the other end is in contact with the water flow generation unit 27 installed through the partition 15, and the lower end is installed in contact with the bottom surface 7.
[0019]
The partition 21 forms a service water tank 25 and a circulation part 35 in the water tank 3. The service water tank 25 is a part surrounded by the partition 21, and the circulating part 35 is a part sandwiched between the partition 21, the side surface 5a, the side surface 5c, and the side surface 5b. The circulating portion 35 includes a circulating portion 35a between the partition 21a and the side surface 5a, a circulating portion 35c between the partition 21c and the side surface 5c, and a circulating portion 35b between the partition 21b and the side surface 5b. Although the circulation part 35a and the circulation part 35c are continuing, the partition 43 is provided between the circulation part 35c and the circulation part 35b, and a water flow is interrupted | blocked.
[0020]
An opening 23 is provided in the partition 21. The opening 23a is the partition 21a, the opening 23b is the partition 21b, and the opening 23c is the opening 23 provided in the partition 21c. 3 is an enlarged elevation view near the opening 23, and FIG. 4 is a sectional elevation view near the opening 23. As shown in FIG. FIG. 4 is a cross-sectional view taken along the line ZZ in FIG.
[0021]
As shown in FIGS. 3 and 4, the flow rate control device 24 is installed in the partition 21 at the opening 23. The flow control device 24 is movable in the vertical direction, for example, and the opening 26 is formed in the partition 21 by operating the flow control device 24. The opening 26 is used as a water channel between the service water tank 25 and the circulation part 35. The flow rates entering and exiting the plurality of openings 23 can be individually controlled. The open / closed state, opening ratio, etc. of each opening 23 are determined in accordance with the flow and wave to be generated.
[0022]
As shown in FIG. 2, a plurality of water flow generators 27 are installed in the partition 15 so as to penetrate the partition 15. As shown in FIG. 1, the water flow generator 27 includes a main pipe 30 arranged in parallel with the side surfaces 5 a and 5 b in the long side direction of the water tank 3, a branch pipe 32 branched from the main pipe 30, and a water flow installed in the main pipe 30. The generator 29, the valve 33, the valve 31 installed in the branch pipe 32, and the like. The water flow generator 29 is installed on the water storage tank 9 side from the branch portion between the main pipe 30 and the branch pipe 32, and the valve 33 is installed on the service water tank 25 side from the branch portion between the main pipe 30 and the branch pipe 32.
[0023]
An intake / exhaust port 37 is provided at the end of the main pipe 30 on the water storage tank 9 side. An intake / exhaust port 41 is provided at the other end of the main pipe 30, and a multidirectional irregular wave generator 17 is installed in the vicinity of the intake / exhaust port 41. The multidirectional irregular wave making device 17 has a wave making plate 19 on a vertical surface on the service water tank 25 side.
[0024]
The multidirectional irregular wave generator 17 forms a buffer tank 45 continuous with the circulating portion 35b between the in-service water tank 25 and the water tank 9. An intake / exhaust port 39 is provided at the end of the branch pipe 32 disposed in the buffer tank 45. The main pipe 30, the branch pipe 32, the intake / exhaust port 37, the intake / exhaust port 39, and the intake / exhaust port 41 are made of a material that can withstand the pressure of the water flow.
[0025]
In the water flow generation unit 27, the valve 33 installed in the main pipe 30 is opened and the valve 32 installed in the branch pipe 32 is closed, so that water can be moved between the water storage tank 9 and the service water tank 25.
[0026]
Further, by closing the valve 33 installed in the main pipe 30 and opening the valve 32 installed in the branch pipe 32, water can be moved between the water storage tank 9 and the circulating portion 35b via the buffer tank 45. It becomes.
[0027]
The water flow generator 29 has a function of generating a water flow in the forward / reverse direction between the water storage tank 9 and the service water tank 25 or between the water storage tank 9 and the circulating portion 35b via the buffer tank 45. The water flow generator 29 is, for example, a pump such as an axial flow pump and a thruster. A motor (not shown) for driving the water flow generator 29, the flow rate control device 24 of the opening 23, the valve 31, and the valve 33 are controlled using, for example, a computer (not shown).
[0028]
In the service water tank 25, the bottom surface 7 is raised to about 20 cm to the bottom surface 7a. Moreover, a sand pit 13 for forming an experimental model is provided. A wave-dissipating device 11 is provided on the side surface 5 d of the water storage tank 9. The wave-absorbing device 11 is composed of a plurality of rectangular plates. Each plate is installed in parallel so that one side of the long side is in contact with the side surface 5d, the short side is in contact with the side surface 5a and the side surface 5b, and is inclined from the side surface 5d to the bottom surface 7. The wave-dissipating device 11 prevents waves generated by the water flow from the water flow generating unit 27 from flowing out of the water tank 3 beyond the side surface 5d.
[0029]
Next, the operation of the oceanographic reproduction aquarium 1 will be described. When reproducing waves and flows in the oceanographic reproduction tank 1, first, in accordance with the direction of the flow to be generated, the open / close state of the plurality of openings 23 provided in the partition 21, and the main pipe 30 of the water flow generator 27. The opening / closing state of the valve 33 provided in the valve and the valve 31 provided in the branch pipe and the operation direction of the water flow generator 29 are determined.
[0030]
Further, in accordance with the strength of the flow to be generated, the direction and number of rotations of a motor (not shown) for driving the water flow generating device 29 of the water flow generating unit 27, the flow rates of the valves 31 and 33, the opening 23 The opening ratio of the flow control device 24 is determined.
[0031]
And the flow control device 24 (FIG. 3, FIG. 4) of the opening part 23 is controlled, and the some opening part 23 is made into an open state or a closed state, respectively. Next, the valve 33 provided in the main pipe 30 and the valve 31 provided in the branch pipe are brought into an open state or a closed state. Furthermore, the operation of the water flow generator 29 is started.
[0032]
When the water flow generator 29 is operated with the valve 31 closed and the valve 33 open, water moves from the water tank 25 to the water tank 9 or from the water tank 9 to the water tank 25 depending on the operation direction of the water flow generator 29. To do. Further, when the water flow generator 29 is operated with the valve 33 closed and the valve 31 open, depending on the operation direction of the water flow generator 29, the buffer tank 45 is changed to the water tank 9 or the water tank 9 is changed to the buffer tank 45. Water moves.
[0033]
At this time, if the opening 23a is in an open state, water moves between the in-service water tank 25 and the circulating portion 35a. If the opening 23b is in an open state, water moves between the service water tank 25 and the circulation part 35b, and if the opening 23c is in an open state, water moves between the service water tank 25 and the circulation part 35c. To do.
[0034]
After the water flow becomes steady and the target direction and strength of the water flow are obtained, the operation of the multidirectional irregular wave generator 17 is started.
[0035]
Below, the case where a wave and a flow are generated in each direction shown by arrows A and B in FIG. 1 using the sea state reproduction aquarium 1 will be described along the flowchart in FIG. 5. FIG. 5 is a flowchart of a method for generating a flow in the direction indicated by arrow A or B in FIG. 1. FIG. 6 is a plan view of the sea state reproduction tank 1 when the flow in the direction indicated by arrow A is generated. These show the top view of the sea state reproduction water tank 1 at the time of the flow generation | occurrence | production of the direction shown by the arrow B. FIG.
[0036]
In order to generate the flow in the direction of the arrow A shown in FIGS. 1 and 6, first, as shown in FIG. 6, the opening 23a and the opening 23b are closed, the opening 23c is opened (step 101), and a partition is formed. An opening 26 is provided only in 21c. Then, the water flow generator 27 closes the valve 31 provided in the branch pipe 32 (step 102), and opens the valve 33 provided in the main pipe 30 (step 103). Furthermore, the water flow generator 29 is operated so that the water flow from the water storage tank 9 to the service water tank 25 occurs (step 104).
[0037]
By driving the water flow generating device 29, in the vicinity of the water flow generating unit 27, water in the water storage tank 9 is drawn from the intake / exhaust port 37, passes through the main pipe 30, and is discharged from the intake / exhaust port 41 into the service water tank 25. In the vicinity of the partition 21c, the water in the service water tank 25 flows into the circulation part 35c through the opening 26 of the opening part 23c. The water that has flowed into the circulation portion 35c returns to the water tank 9 through the circulation portion 35a. That is, a water flow in the direction shown by the arrow F in FIG.
[0038]
In order to generate the flow in the direction of arrow B shown in FIGS. 1 and 7, first, as shown in FIG. 7, the opening 23a and the opening 23b are closed, the opening 23c is opened (step 101), and the partition is formed. An opening 26 is provided only in 21c. Then, the water flow generator 27 closes the valve 31 provided in the branch pipe 32 (step 102), and opens the valve 33 provided in the main pipe 30 (step 103). Furthermore, the water flow generator 29 is operated so that the water flow from the service tank 25 to the water storage tank 9 occurs (step 104).
[0039]
By driving the water flow generating device 29, in the vicinity of the water flow generating unit 27, water in the service water tank 25 is drawn from the intake / exhaust port 41, passes through the main pipe 30, and is discharged from the intake / exhaust port 37 into the water storage tank 9. The water that has flowed into the water storage tank 9 reaches the circulating portion 35c through the circulating portion 35a. In the vicinity of the partition 21c, the water in the circulating portion 35c flows into the service water tank 25 through the opening 26 of the opening 23c. That is, a water flow in the direction shown by the arrow G in FIG.
[0040]
Next, the case where a flow is generated in each direction indicated by arrows C and D in FIG. 1 using the sea-state reproduction water tank 1 will be described along the flowchart in FIG. 8 is a flowchart of a method for generating a flow in the direction indicated by the arrow C or D in FIG. 1. FIG. 9 is a plan view of the sea state reproduction tank 1 when the flow in the direction indicated by the arrow C is generated. These show the top view of the sea state reproduction water tank 1 at the time of the flow generation | occurrence | production of the direction shown by arrow D. FIG.
[0041]
In order to generate the flow in the direction of the arrow C shown in FIGS. 1 and 9, first, as shown in FIG. 9, the opening 23a and the opening 23b are opened, and the opening 23c is closed (step 201). An opening 26 is provided in 21a and the partition 21b. Then, the water flow generator 27 closes the valve 33 provided in the main pipe 30 (step 202), and opens the valve 31 provided in the branch pipe 32 (step 203). Further, the water flow generator 29 is operated so that a water flow from the water storage tank 9 to the buffer tank 45 occurs (step 204).
[0042]
By driving the water flow generating device 29, in the vicinity of the water flow generating unit 27, the water in the water storage tank 9 is drawn from the intake / exhaust port 37, passes through the main pipe 30 and the branch pipe 32, and is discharged from the intake / exhaust port 39 into the buffer tank 45. The The water that has flowed into the buffer tank 45 reaches the circulation section 35b. In the vicinity of the partition 21b, the water in the circulation part 35b flows into the service water tank 25 through the opening 26 of the opening part 23b. Moreover, in the partition 21a vicinity, the water in the service water tank 25 flows in into the circulation part 35a through the opening 26 of the opening part 23a. The water that has flowed into the circulation portion 35a returns to the water storage tank 9. That is, a water flow in the direction indicated by the arrow H in FIG.
[0043]
In order to generate the flow in the direction of the arrow D shown in FIGS. 1 and 10, first, as shown in FIG. 10, the opening 23a and the opening 23b are opened, and the opening 23c is closed (step 201). An opening 26 is provided in 21a and the partition 21b. Then, the water flow generator 27 closes the valve 33 provided in the main pipe 30 (step 202), and opens the valve 31 provided in the branch pipe 32 (step 203). Further, the water flow generator 29 is operated so that a water flow from the buffer tank 45 to the water storage tank 9 occurs (step 204).
[0044]
By driving the water flow generator 29, in the vicinity of the water flow generator 27, the water in the buffer tank 45 is sucked from the intake / exhaust port 39, passes through the branch pipe 32 and the main pipe 30, and is discharged from the intake / exhaust port 37 into the water storage tank 9. The The water that has flowed into the water storage tank 9 reaches the circulation section 35a. In the vicinity of the partition 21a, the water in the circulation part 35a flows into the service water tank 25 through the opening 26 of the opening 23a. Moreover, in the partition 21b vicinity, the water in the service water tank 25 flows in into the circulation part 35b through the opening 26 of the opening part 23b. The water that has flowed into the circulation part 35 b returns to the buffer tank 45. That is, a water flow in the direction indicated by the arrow I in FIG.
[0045]
Next, a case where a flow is generated in the direction indicated by the arrow E in FIG. 1 using the sea state reproduction water tank 1 will be described with reference to the flowchart in FIG. FIG. 11 is a flowchart of a method for generating a flow in the direction indicated by arrow E in FIG. 1, and FIG. 12 is a plan view of the sea state reproduction water tank 1 when the flow in the direction indicated by arrow E is generated.
[0046]
In order to generate a wave and a flow in the direction of arrow E shown in FIGS. 1 and 12, first, as shown in FIG. 12, the opening 23a, the opening 23b, and the opening 23c are closed (step 301), and a partition is formed. No opening is provided in 21. Then, the water flow generator 27 closes the valve 31 provided in the branch pipe 32 (step 302), and opens the valve 33 provided in the main pipe 30 (step 303). Furthermore, the water flow generator 29 is operated so that the water flow from the water storage tank 9 to the service water tank 25 and the water flow from the service water tank 25 to the water storage tank 9 occur alternately (step 304).
[0047]
By driving the water flow generator 29, in the vicinity of the water flow generation unit 27, water in the water storage tank 9 is sucked from the intake / exhaust port 37 and discharged from the intake / exhaust port 41 into the service water tank 25 through the main pipe 30. The state in which the water in the water tank 25 is drawn from the intake / exhaust port 41 and is discharged from the intake / exhaust port 37 through the main pipe 30 into the water storage tank 9 alternately occurs. That is, a water flow in the direction indicated by the arrow J in FIG.
[0048]
By generating a forward and reverse flow as indicated by an arrow J, a tsunami 49 (FIG. 2), which is a long-period wave, is generated in the service water tank 25 in the direction indicated by the arrow E.
[0049]
Thus, in this Embodiment, the circulation part 35 is provided in the circumference | surroundings of the service water tank 25, and between the water storage tank 9 and the service water tank 25 between the water tank 9 and the service water tank 25 using the water flow generation part 7, A water flow in the reciprocating direction is generated between the two. In addition, a plurality of openings 23 are provided as water channels between the service water tank 25 and the circulation part 35. The flow rate of entering and exiting the plurality of openings 23 can be individually controlled, and water can be moved through the openings 23 between the service water tank 25 and the circulation unit 35.
[0050]
By controlling the direction of the water flow between the water storage tank 9 and the service water tank 25 or between the water storage tank 9 and the circulation part 35 and the position of the opening 26 between the service water tank 25 and the circulation part 35, the service water tank 25. It is possible to generate a water flow or a long-period wave in any direction. In addition, the strength of the water flow can be changed by adjusting the flow rate of the water flow generator 29, the valve 31, and the valve 33, the opening ratio of the opening 23, and the like.
[0051]
Furthermore, by providing a multidirectional irregular wave generator 17 in the water tank 3 and generating a wind wave using the multidirectional irregular wave generator 17, water flow and waves in any direction can be generated simultaneously. Can do.
[0052]
Waves and flow fields in the actual water tank 25, such as multidirectional irregular waves (wind waves) and tides (tide level fluctuations), tidal currents (velocity and direction), tsunamis (very long period waves), coastal By conducting hydraulic model experiments by simultaneously generating flow (flow along the shore), shore flow, offshore flow, etc., planning, designing, and construction of breakwaters, harbor facilities, marine structures, etc. The problem can be solved empirically, and rational design and construction become possible.
[0053]
In the present embodiment, the water storage tank 9 and the service tank 25 and the water storage tank 9 and the buffer tank 45 are connected by one water flow generation unit 27, but the water flow generation that connects the water storage tank 9 and the service water tank 25 is performed. And a water flow generation unit that connects the water storage tank 9 and the buffer tank 45 may be provided separately, and a valve and a water flow generation device may be installed in each.
[0054]
Moreover, in this Embodiment, although the water storage tank 9, the service water tank 25, and the circulation part 35 were formed by installing the partition 15 and the partition 21 in the rectangular parallelepiped-shaped water tank 3, you may provide these separately. . In that case, the water tank and the service water tank, the water tank and the circulation part are connected by a water flow generation part of another shape, and other types of openable and closable water channels are installed between the service tank and the circulation part. To do.
[0055]
【The invention's effect】
As described above in detail, according to the present invention, it is possible to provide a marine state reproduction aquarium that can faithfully reproduce the wave and flow fields generated in the sea area within the aquarium at a low cost, in a short time, and safely.
[Brief description of the drawings]
FIG. 1 is a plan view of a marine reproduction tank 1. FIG. 2 is a sectional elevation view of the sea reproduction tank 1. FIG. 3 is an enlarged elevation view near an opening 23. FIG. 4 is a sectional elevation view near an opening 23. FIG. 5 is a flowchart of a method for generating a flow in the direction indicated by the arrow A or B in FIG. 1. FIG. 6 is a plan view of the sea state reproduction tank 1 when the flow in the direction indicated by the arrow A is generated. FIG. 8 is a flow chart of a method for generating a flow in the direction indicated by arrow C or D in FIG. 1. FIG. 9 is a flow generation in the direction indicated by arrow C. FIG. 10 is a plan view of the seawater reproduction tank 1 when a flow in the direction indicated by arrow D is generated. FIG. 11 is a flowchart of a method for generating a flow in the direction indicated by arrow E in FIG. FIG. 12 is a plan view of the sea state reproduction tank 1 when a flow in the direction shown by an arrow E occurs. Description of the code]
DESCRIPTION OF SYMBOLS 1 ......... Sea state reproduction tank 3 ...... Water tank 9 ......... Water storage tanks 15, 21, 21a, 21b, 21c ......... Partition 17 ......... Multi-directional irregular wave generator 23 ..., 23a, 23b, 23c ......... Opening 24 ......... Flow control device 25 ......... Service tank 26 ......... Opening 27 ......... Water flow generating unit 29 ......... Water flow generating device 30 ......... Main pipes 31, 33 ......... Valve 32 ......... Branch pipes 35, 35a, 35b, 35c ......... Circulation part 43 ......... Partition 45 ......... Buffer tank

Claims

An in-service tank filled with water;
A reservoir filled with water,
A circulation section provided around the service water tank, in which water circulates;
A plurality of openable and closable water channels provided between the circulating portion and the in-service water tank;
A water flow generation unit provided between the water storage tank and the service water tank and the circulation unit;
A sea water reproduction tank characterized by comprising:

By installing a first partition that divides the inside of the tank into two in a rectangular parallelepiped water tank provided with first to fourth side surfaces on the bottom surface, the service water tank and the water tank The seawater reproduction water tank according to claim 1, wherein

3. The service water tank and the circulation part are formed by installing a second partition in the water tank in parallel with the second side surface, the third side surface, and the fourth side surface. Sea tank reproduction tank described.

In the opening provided in the second partition, an opening is formed in the second partition by operating a flow control device installed in the second partition, and the opening is used as the water channel. The marine reproduction tank according to claim 3.

5. The sea state reproduction aquarium according to claim 4, wherein the opening portion changes the size and the like of the opening portion to change the flow rate of entering and exiting.

The circulation part is divided by a partition into a first circulation part connected to the water storage tank and a second circulation part connected to the water storage tank via the water flow generation part. The oceanographic reproduction tank according to claim 1.

The water flow generator is
A main pipe connecting the water storage tank and the service water tank;
A water flow generator installed in the main pipe;
A first valve installed in the main pipe;
A branch pipe branched from the main pipe and connecting the water storage tank and the circulation portion;
A second valve installed in the branch pipe;
Comprising
2. The sea state reproduction aquarium according to claim 1, wherein after opening and closing the water channel, the first valve or the second valve is opened to generate a water flow in the service water tank or the circulating portion.

The marine reproduction tank according to claim 1, further comprising a wave making device provided in the service tank.