JPH076298B2 - Circulating water tank - Google Patents
Circulating water tankInfo
- Publication number
- JPH076298B2 JPH076298B2 JP31545186A JP31545186A JPH076298B2 JP H076298 B2 JPH076298 B2 JP H076298B2 JP 31545186 A JP31545186 A JP 31545186A JP 31545186 A JP31545186 A JP 31545186A JP H076298 B2 JPH076298 B2 JP H076298B2
- Authority
- JP
- Japan
- Prior art keywords
- water channel
- water
- curved
- flow
- guide plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Description
【発明の詳細な説明】 [産業上の利用分野] 本発明は、水泳の練習、選手強化訓練指導用の回流式プ
ールとして用いたり、或いは船舶や海洋構造物等に関す
る流体力学的現象を試験用、縮尺模型を用いて観測、計
測したりするための回流式水槽に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is used as a circulating pool for swimming training, athlete training training guidance, or for testing hydrodynamic phenomena related to ships and marine structures. , A circular water tank for observing and measuring with a scale model.
[従来の技術] 近年、水泳の練習方法も科学的且つ能率的な方式を採る
ようになってきており、観測部を有する循環流路内に水
を循環させるための水流発生装置を設けて、上記観測部
にて水泳の練習、訓練等を行えるようにした回流式水槽
が一部で実用化されている。[Prior Art] In recent years, the practice method of swimming has also come to adopt a scientific and efficient method, and a water flow generator for circulating water in a circulation channel having an observation part is provided, A part of the circulating water tank has been put to practical use so that swimming exercises and training can be performed at the observation section.
[発明が解決しようとする問題点] しかしながら、上記従来の回流式水槽は、形状寸法が大
型であった。即ち、これは水槽本体の中で水を回流させ
ることに起因して種々の乱れが生じることから、観測部
において流れを一様とするために、又観測部で発生する
気泡を除去するために、水槽本体の寸法を大きくとり、
十分な整流区間や気泡除去空間を設ける必要があったた
めである。[Problems to be Solved by the Invention] However, the conventional circulation type water tank described above has a large size. In other words, this is because various turbulence occurs due to water being circulated in the water tank body, so in order to make the flow uniform in the observation part and to remove bubbles generated in the observation part. , Take a large size of the tank body,
This is because it was necessary to provide a sufficient rectifying section and a bubble removal space.
本発明は斯かる実情に鑑み、整流区間や気泡除去区間に
工夫を凝らすことにより、全体的に小型で且つ性能のよ
い回流式水槽を提供しようとするものである。In view of the above situation, the present invention is to provide a swirling water tank that is small in size and good in performance by making ingenuity in the rectification section and the bubble removal section.
[問題点を解決するための手段] 本発明は、上下部水路と該上下部水路を連絡する前後部
湾曲水路とから竪型回流式水槽本体を構成すると共に、
上記上部水路と底面を全長に亘り段差のない平面とし、
後部湾曲水路の上壁面を上流へ向けて穏やかな上り勾配
とし、上記上部水路に上部を開口した観測部を設け、該
観測部の上部開口を形成する開口縁フランジの後壁部を
観測部上流側へ下向きに張出させて該張出し部上に消波
構造を設け、上記下部水路に複数の水流発生用インペラ
を並列配設し、上記前後部湾曲水路に、内側より外側へ
向けて間隔が広くなるよう夫々導流板を配置して、前記
湾曲水路内の導流板を前部湾曲水路入口より出口に至る
長さとし、後部湾曲水路内の導流板のうちの最外側導流
板の上流側端部を上記後部湾曲水路上壁面に対する水面
の接点より上流側へ下向きに延在するよう配置し、且つ
該最外側導流板の下流側端部を後部湾曲水路の後壁面に
近付けて絞り部を作ることにより最外側導流板の外側に
水流の澱み部を形成し、後部湾曲水路上壁部の該澱み部
上方位置に気泡排出口を設け、更に上記前記湾曲水路と
上部水路との間に、整流装置を設置した構成を有する。[Means for Solving Problems] The present invention configures a vertical circulation type water tank main body from upper and lower water channels and front and rear curved water channels that connect the upper and lower water channels.
The upper water channel and the bottom surface are flat with no steps over the entire length,
The upper wall of the rear curved water channel is made a gentle upward slope, the observation section with the upper opening is provided in the upper water channel, and the rear wall of the opening edge flange forming the upper opening of the observation section is upstream of the observation section. Side down to provide a wave-dissipating structure on the overhanging portion, a plurality of water flow generating impellers are arranged in parallel in the lower water channel, the front and rear curved water channels, the gap from the inside to the outside. The flow guide plates are arranged so as to be wide, and the flow guide plates in the curved water channel are set to have a length from the front curved water channel inlet to the outlet, and the outermost flow guide plate of the flow guide plates in the rear curved water channel is The upstream end is arranged so as to extend downward from the contact point of the water surface with respect to the upper wall surface of the rear curved water channel, and the downstream end of the outermost guide plate is brought close to the rear wall surface of the rear curved water channel. The stagnation part of the water flow is formed on the outer side of the outermost diversion plate by forming the throttle part. And the bubble discharge port provided in the starch viewed portion above the rear curved water path walls, further between the said curved canals and the upper water passage has a configuration in which established the rectifier.
[作用] インペラの回転により水流が発生し、発生した水流は下
部水路から前部湾曲水路を通って上部水路に流れ、更に
後部湾曲水路を通ってインペラに吸引されて循環する。
この際、水流は夫々前部湾曲水路内の導流板並びに整流
装置により整流され、しかも上部水路の底面が段差のな
い平面としてあることから、定在波のない一様な流れと
して上部水路に送られる。上部水路に送られた水流は、
観測部で例えば泳者の動きにより水面が波動し開口縁フ
ランジの後部壁に衝突砕波しても、消波構造によって衝
突時の気泡が消去され且つ跳ね返り力が減衰される。更
に観測部から後部湾曲水路に流入した水流の水面は後部
湾曲水路の上壁面に沿うように滑らかに流れる。又観測
部で発生した気泡は最外周導流板の外側を通って澱み部
に至り、ここで気泡排出口より自然脱気される。[Operation] A water flow is generated by the rotation of the impeller, the generated water flow flows from the lower water channel to the upper water channel through the front curved water channel, and is further sucked and circulated by the impeller through the rear curved water channel.
At this time, the water flow is rectified by the flow guide plate and the rectifying device in the front curved water channel, respectively, and moreover, since the bottom surface of the upper water channel is a flat surface without steps, it is a uniform flow without standing waves to the upper water channel. Sent. The water flow sent to the upper canal is
Even if the water surface undulates due to the movement of the swimmer in the observation unit and collides against the rear wall of the opening edge flange to break the waves, the wave-eliminating structure eliminates the bubbles at the time of collision and attenuates the rebounding force. Further, the water surface of the water flow flowing into the rear curved water channel from the observation part smoothly flows along the upper wall surface of the rear curved water channel. Further, the bubbles generated in the observation section pass through the outside of the outermost peripheral flow guide plate to reach the stagnation portion, where they are naturally degassed from the bubble discharge port.
[実施例] 以下、図面を参照して本発明の実施例を説明する。Embodiments Embodiments of the present invention will be described below with reference to the drawings.
第1図及び第2図において、1は基台2を介して設置さ
れた垂直循環流型回流式水槽本体であり、上部水路3及
び下部水路4と、該上、下部水路3,4を連結する前部湾
曲水路5及び後部湾曲水路6とから主として構成してお
り、上部水路3の底面3′は下部水路4の上面4′に対
して段差のない平行な平面とし、且つ該底面3′と上面
4′との間を夫々湾曲水路5,6部にて円弧状ガイド部
5′,6′により連続せしめた形状としてある。In FIG. 1 and FIG. 2, 1 is a vertical circulating flow type circulating water tank main body installed via a base 2, and connects the upper water channel 3 and the lower water channel 4 with the upper and lower water channels 3 and 4. It is mainly composed of a front curved water channel 5 and a rear curved water channel 6, and the bottom surface 3'of the upper water channel 3 is a flat plane parallel to the upper surface 4'of the lower water channel 4 and the bottom surface 3 ' The curved water passages 5 and 6 between the upper surface 4'and the upper surface 4'are continuously formed by arcuate guide portions 5'and 6 '.
上部水路3には、水槽本体1側壁部に観測窓7を有する
と共に、上部を開口して自由水面を形成し、これらによ
って観測部8を設けている。又観測部8の上部開口を形
成する開口縁フランジ9の後壁部(下流側壁部9′を上
流側へ下向きに張出させ、該張出し部上に、消波構造と
して水槽本体1幅方向に伸びる消波突条10を複数列設け
ている。The upper water channel 3 has an observation window 7 on the side wall portion of the water tank body 1, and an upper portion is opened to form a free water surface. Also, the rear wall portion of the opening edge flange 9 (the downstream side wall portion 9 ′ is projected downward to the upstream side, which forms the upper opening of the observation portion 8, and the wave-dissipating structure is provided in the width direction of the water tank body 1 on the protruding portion. A plurality of extending wave-dissipating ridges 10 are provided.
下部水路4には、上流側端部位即ち後部湾曲水路6側端
部位置に、複数(図では3基)の水流発生用インペラ11
を水槽本体1外部に設置した駆動装置12によって夫々回
転駆動し得るように設けていると共に、各インペラ11の
下流部には断面を丸から角に変えるデフューザー13を配
置してある。In the lower water channel 4, a plurality of (three in the figure) water flow generating impellers 11 are provided at the upstream end portion, that is, the rear curved water channel 6 side end position.
Are provided so that they can be rotationally driven by a drive device 12 installed outside the water tank body 1, and a diffuser 13 for changing the cross section from a circle to a corner is arranged at the downstream portion of each impeller 11.
前、後の湾曲水路5,6には夫々流路の内側より外側へ向
けて順次その間隔が広くなるよう湾曲形状の導流板14,1
5が設置してあり、前部湾曲水路5と上部水路3との境
には、一様メッシュの整流ハニカム盤16を設けている。
又、前部湾曲水路5内の導流板14は、前部湾曲水路5の
入口より出口に至る長さを有している。尚、上記前部湾
曲水路5内の導流板14の間隔は、水路5出口部の高さを
H(=水深)、水路5の入口部の高さをDとした時、夫
々例えば、a=0.4H、b=0.28H、c=0.18H、d=0.14
H、a′=0.36D、b′=0.29D、c′=0.19D、d′=0.
16Dとしてある。In the front and rear curved water channels 5 and 6, respectively, the curved-shaped flow guide plates 14 and 1 are arranged so that the distance between them gradually increases from the inside to the outside of the channel.
5 is installed, and a uniform mesh rectifying honeycomb board 16 is provided at the boundary between the front curved water channel 5 and the upper water channel 3.
Further, the flow guide plate 14 in the front curved water channel 5 has a length extending from the inlet of the front curved water channel 5 to the outlet thereof. When the height of the outlet of the water channel 5 is H (= water depth) and the height of the inlet of the water channel 5 is D, the distance between the flow guide plates 14 in the front curved water channel 5 is, for example, a = 0.4H, b = 0.28H, c = 0.18H, d = 0.14
H, a '= 0.36D, b' = 0.29D, c '= 0.19D, d' = 0.
It is as 16D.
更に、前記後部湾曲水路6に設置した導流板15のうちの
最外側導流板15′は、その上流側端部を、後部湾曲水路
6の水槽本体上壁面1aに対して水面が接する位置(接点
20)より寸法Xだけ上流側へ延在するよう且つ水平より
下向きに配置し、一方下流側端部位置を、後部湾曲水路
6の水槽本体後壁面1bに適宜近接させて絞り部17を形成
しており、該絞り部17を形成することによって、該最外
側導流板15′の外側に水流の澱み部19を形成し、且つ該
澱み部19に存在する気泡を排出するための気泡排出口18
を、後部湾曲水路6の水槽本体上壁面1a部に穿設してい
る。又、水面が接する後部湾曲水路6の水槽本体上壁面
1aは、水面との接点20において気泡の発生を少なくする
よう観測部8へ向けて3〜5%の上り勾配としてある。
尚、上記絞り部17は観測部8の水深Hに対して1/8H程度
の間隙としている。Further, the outermost flow guide plate 15 'of the flow guide plates 15 installed in the rear curved water channel 6 is located at a position where the upstream surface of the water guide plate 15' is in contact with the water tank body upper wall surface 1a of the rear curved water channel 6. (contact
20) is arranged so as to extend upstream by a dimension X and downward from the horizontal, while the downstream end position is appropriately brought close to the water tank body rear wall surface 1b of the rear curved water channel 6 to form the throttle portion 17. By forming the narrowed portion 17, a stagnation portion 19 of the water flow is formed outside the outermost flow guide plate 15 ′, and a bubble discharge port for discharging bubbles present in the stagnation portion 19 18
Is bored in the water tank body upper wall surface 1a of the rear curved water channel 6. In addition, the upper wall surface of the aquarium body of the rear curved water channel 6 in contact with the water surface
1a has an upward slope of 3 to 5% toward the observation unit 8 so as to reduce the generation of bubbles at the contact point 20 with the water surface.
The narrowed portion 17 has a gap of about 1 / 8H with respect to the water depth H of the observation portion 8.
斯かる構成としてあるので、駆動装置12によって各イン
ペラ11を回転駆動することにより水流が発生し、発生し
た水流はデフューザー13を介し下部水路4で加速され、
加速された水流は前部湾曲水路5並びに整流ハニカム盤
16を通って上部水路3に送られ、更に後部湾曲水路6を
通過して各インペラ11により吸収され、而して、水流は
循環する。With such a configuration, a water flow is generated by rotationally driving each impeller 11 by the drive device 12, and the generated water flow is accelerated in the lower water channel 4 via the diffuser 13,
The accelerated water flow is the front curved water channel 5 and the straightening honeycomb board.
It is sent to the upper water channel 3 through 16 and further passed through the rear curved water channel 6 to be absorbed by each impeller 11 and thus the water flow circulates.
前記において、インペラ11は水槽本体1の幅方向に3基
並列させてあるので、通常1基のみの設置としてある従
来の回流式水槽に比して水槽本体1の全高を低くするこ
とができる。更に各インペラ11には夫々デフューザー13
が接続されているので、該デフューザー13の拡がり角を
従来と同じにした場合、デフューザー13の長さが短かく
なり、水槽本体1の全長も短かくなる。In the above description, since three impellers 11 are arranged in parallel in the width direction of the water tank body 1, the total height of the water tank body 1 can be made lower than that of a conventional circulation type water tank in which only one impeller is normally installed. Further, each impeller 11 has a diffuser 13
When the divergence angle of the diffuser 13 is the same as that of the conventional one, the length of the diffuser 13 becomes short and the total length of the water tank body 1 becomes short.
又、下部水路4から前部湾曲水路5内に流れ込んだ水流
は各導流板14の間を通って上部水路3内に一様な流れで
送られる。即ち、一般に円弧まわりを流れる流体の流速
分布は内側で速く外側で遅くなることが知られている
が、本発明では前部湾曲水路5の中に配置して湾曲形状
の導水板14の間隔を、内側では密に外側では疎に設定
し、しかも導水板14を水路5の入口から出口全長に亘る
長さとしたことから、各導水板14間が一つの独立した水
路とみなされ、各水路における種々の損失(摩擦損失、
曲りによる損失)を各々等しくして、流速分布を一様に
近付けることができる。しかも一様メッシュの整流ハニ
カム盤16を設置したことにより、斯かる効果を一層高め
ることができる。Further, the water flow flowing from the lower water channel 4 into the front curved water channel 5 is sent as a uniform flow into the upper water channel 3 through between the flow guide plates 14. That is, it is generally known that the flow velocity distribution of the fluid flowing around the arc is fast on the inner side and slow on the outer side, but in the present invention, it is arranged in the front curved water channel 5 and the interval between the curved water guiding plates 14 is set. , The inner side is set densely and the outer side is set sparse, and moreover, since the water guide plate 14 has a length extending from the inlet to the outlet of the water channel 5, each water guide plate 14 is regarded as one independent water channel, and Various losses (friction loss,
(Loss due to bending) can be made equal, and the flow velocity distribution can be approximated uniformly. Moreover, by installing the rectifying honeycomb board 16 having a uniform mesh, such an effect can be further enhanced.
更に、上部水路3では、底面3′を全長に亘り段差のな
い平面として水深が変化しないようにしてあることか
ら、観測部8での自由水面に定在波を発生することがな
く、観測部8での流れの一様性を更に良好にすることが
できる。又上部水路3の底面3′上流端と下部水路4の
上面4′とを円弧状ガイド部5′,6′によって連続させ
てあるので、流れの剥離も起らない。Further, in the upper water channel 3, since the bottom surface 3'is formed as a flat surface over the entire length so that the water depth does not change, a standing wave is not generated on the free water surface in the observation unit 8 and the observation unit The flow uniformity at 8 can be further improved. Further, since the upstream end of the bottom surface 3'of the upper water channel 3 and the upper surface 4'of the lower water channel 4 are connected by the arcuate guide portions 5'and 6 ', flow separation does not occur.
ところで、観測部8では、水泳の練習や、或いは船舶の
模型を用いて流体力学試験等を行うが、この際、水面が
波動し、これが開口縁フランジ9の後壁部9′に衝突し
砕波した場合、気泡が発生したり跳ね返って水槽外へ溢
水するが、本発明では上記後壁部9′の張出し部上に消
波突条10が設けてあるので、気泡が消去されると共に跳
ね返り力が減衰され、後部湾曲水路6への気泡の巻込
み、水槽外への溢水が防止される。そのため、観測部8
での流れの一様性を阻害することがなく、又水量減少に
伴う観測部8での定在波発生の助長を防止できる。By the way, in the observation section 8, swimming exercises or a hydrodynamic test using a model of a ship are carried out. At this time, the water surface undulates, and this collides with the rear wall 9'of the opening edge flange 9 and breaks waves. In this case, air bubbles are generated or bounce off and overflow to the outside of the water tank. However, in the present invention, since the wave-dissipating ridge 10 is provided on the overhanging portion of the rear wall portion 9 ', the air bubbles are erased and the bounce force is increased. Is dampened, and the inclusion of bubbles in the rear curved water channel 6 and the overflow of water out of the water tank are prevented. Therefore, the observation section 8
Therefore, it is possible to prevent the occurrence of standing waves in the observation unit 8 due to the decrease in the amount of water without hindering the uniformity of the flow in the flow.
従って、上部水路3を流れる水流は安定しており、観測
部8での観測を精度よく安定して行うことができる。Therefore, the water flow flowing through the upper water channel 3 is stable, and the observation by the observation unit 8 can be performed accurately and stably.
更に観測部8を通過した水流は後部湾曲部水路6に導か
れ、その水面部分の水流は後部湾曲水路6の水槽本体上
壁面1aに衝突する。しかし本発明では、上記水槽本体上
壁面1aが水面に対して3〜5%の上り勾配としてあるた
め、水流の衝突力は緩衝され水流は水槽本体上壁面1aに
対し極めて鋭角的に滑るよう接触して倣流し、この部分
では気泡を殆ど発生させないで済む。一方、観測部8で
は、水泳の練習や船舶模型の動作自体によって気泡が発
生する。而して、観測部8で発生した気泡は、後部湾曲
水路6内の最外側導流板15′の上流側端部が、上記水槽
本体上壁面1aの水流接点20より上流へ延在し且つ下向き
配置してあることから、最外側導流板15′の外側を通っ
て後部湾曲水路6内に入り込む。最外側導流板15′の外
側には、該最外側導流板15′の下流側端部と水槽本体後
壁面1bとの間で絞り部17を形成して水流の流速を低下さ
せるようにした澱み部19を形成しているので、澱み部19
に流入した水流中の気泡は気泡排出口18から真空ポンプ
を用いることなく自然排出される。脱気後の水流は絞り
部17を通過して下部水路4側へ戻される。Further, the water flow that has passed through the observation unit 8 is guided to the rear curved water channel 6, and the water flow of the water surface portion collides with the water tank body upper wall surface 1a of the rear curved water channel 6. However, in the present invention, since the water tank body upper wall surface 1a has an upward slope of 3 to 5% with respect to the water surface, the collision force of the water flow is buffered, and the water flow contacts the water tank body upper wall surface 1a so as to slide in an extremely acute angle. Then, the flow is followed, and it is possible to generate almost no bubbles in this portion. On the other hand, in the observation unit 8, bubbles are generated due to the practice of swimming and the movement of the boat model itself. Thus, in the bubbles generated in the observation section 8, the upstream end of the outermost flow guide plate 15 'in the rear curved water channel 6 extends upstream from the water flow contact 20 of the water tank body upper wall surface 1a, and Since it is arranged downward, it passes through the outside of the outermost flow guide plate 15 'and enters the rear curved water channel 6. On the outside of the outermost flow guide plate 15 ', a throttle portion 17 is formed between the downstream end of the outermost flow guide plate 15' and the rear wall surface 1b of the water tank main body to reduce the flow velocity of the water flow. Since the stagnation part 19 is formed, the stagnation part 19
The air bubbles in the water flow that has flowed into the air are naturally exhausted from the air bubble outlet 18 without using a vacuum pump. The water flow after deaeration passes through the throttle portion 17 and is returned to the lower water channel 4 side.
このように、気泡を含んだ水流の流速を低下させること
により、気泡除去区間を短くでき、水槽本体1の長さを
短くすることができる。As described above, by reducing the flow velocity of the water flow containing bubbles, the bubble removal section can be shortened and the length of the water tank body 1 can be shortened.
尚、本発明は前記実施例にのみ限定されるものではな
く、本発明の要旨を逸脱しない限り種々変更を加え得る
ことは勿論である。It should be noted that the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.
[発明の効果] 以上説明したように、本発明の回流式水槽によれば、次
の如き優れた効果を奏し得る。[Effects of the Invention] As described above, according to the circulating water tank of the present invention, the following excellent effects can be obtained.
(i) 水流発生用インペラを複数並列方式としたの
で、水槽本体の高さを低くできる。(I) Since the plurality of impellers for water flow generation are arranged in parallel, the height of the water tank body can be reduced.
(ii) 前部湾曲水路に、該水路の入口から出口に至り
しかも内側から外側へ向けてその間隔が広くなるよう導
流板を配置し、且つ前部湾曲水路と上部水路の境に、整
流装置を設けたので、短い整流区間で観測部での流れの
一様性を確保することができ、且つ損失水頭を小さくで
きる。(Ii) In the front curved water channel, a flow guide plate is arranged so that the distance from the inlet to the outlet of the water channel is widened from the inner side to the outer side, and rectification is performed at the boundary between the front curved water channel and the upper water channel. Since the device is provided, the uniformity of the flow in the observation section can be ensured in a short rectification section, and the head loss can be reduced.
(iii) 上部水路の底面を、全長に亘り段差のない平
面としたので、定在波の発生を抑制し、流れの一様性を
更に良好にすることができる。(Iii) Since the bottom surface of the upper water channel is a flat surface without steps over the entire length, it is possible to suppress the generation of standing waves and further improve the uniformity of flow.
(iv) 観測部の上部開口を形成する開口縁フランジの
後壁部を、観測部上流側へ下向きに張出させ、該張出し
部上に消波構造を設けたので、観測部での泳者の動き等
により水面が波動しこれが衝突しても、この際に発生し
た気泡を消去すると共に跳ね返り力を減衰し、後部湾曲
水路への気泡の巻込み並びに水槽外への溢水をなくすこ
とができ、観測部での流れの一様性の阻害、及び定在波
発生の助長を防止することができる。(Iv) The rear wall of the opening edge flange that forms the upper opening of the observation section is projected downward to the upstream side of the observation section, and the wave-dissipating structure is provided on the overhanging section. Even if the water surface undulates due to movement or the like and collides with it, it is possible to eliminate the bubbles generated at this time and attenuate the rebounding force, and to prevent the inclusion of bubbles in the rear curved water channel and the overflow of water outside the tank, It is possible to prevent the flow uniformity in the observation section from being hindered and the promotion of standing wave generation.
(v) 後部湾曲水路の上壁面を水面との接点において
緩やかな上り勾配としてあるので、この部分での気泡の
発生を殆どなくすことができる。(V) Since the upper wall surface of the rear curved water channel has a gentle upward slope at the contact point with the water surface, it is possible to almost completely eliminate the generation of bubbles in this portion.
(vi) 後部湾曲水路内に配した導流板のうち、最外側
導流板の上流側端部を上流へ向け下向き配置したので、
観測部で発生した気泡を循環させることなく該最外側導
流板の外側へ導くことができる。(Vi) Of the guide plates arranged in the rear curved channel, the upstream end of the outermost guide plate is arranged downward so that
The bubbles generated in the observation section can be guided to the outside of the outermost flow guide plate without being circulated.
(vii) 後部湾曲水路の後壁面と最外側導流板の下流
側端部との間で絞りを作り、最外側導流板の外側に流速
の小さい澱み部を形成することができるので、該澱み部
に流入した気泡の滞留時間を長くとれ、真空ポンプを用
いることなく効率よく気泡の自然排出を行うことができ
る。(Vii) Since a restriction can be formed between the rear wall surface of the rear curved channel and the downstream end of the outermost guide plate to form a stagnation part having a small flow velocity outside the outermost guide plate. The residence time of the bubbles that have flowed into the stagnation portion can be made long, and the bubbles can be efficiently naturally discharged without using a vacuum pump.
(viii) 上記(iv)〜(vii)項から気泡除去区間を
短くすることができる。(Viii) The bubble removal section can be shortened from the above items (iv) to (vii).
(ix) 従って、観測部での観測を精度よく行うことが
できると共に、水槽全体を小型化することができる。(Ix) Therefore, it is possible to perform the observation in the observation section with high accuracy and to reduce the size of the entire water tank.
【図面の簡単な説明】 第1図は本発明の回流式水槽の全体を示す概略切断側面
図、第2図は第1図のII-II矢視図である。 1は水槽本体、1aは上壁面、1bは後壁面、3は上部水
路、3′は底面、4は下部水路、5は前部湾曲水路、6
は後部湾曲水路、8は観測部、9は開口縁フランジ、
9′は後壁部、10は消波突条、11はインペラ、12は駆動
装置、14,15は導流板、15′は最外側導流板、16は整流
ハニカム盤、17は絞り部、18は気泡排出口、19は澱み
部、20は接点を示す。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic sectional side view showing the whole circulation type water tank of the present invention, and FIG. 2 is a II-II arrow view of FIG. 1 is an aquarium body, 1a is an upper wall surface, 1b is a rear wall surface, 3 is an upper water channel, 3'is a bottom surface, 4 is a lower water channel, 5 is a front curved water channel, 6
Is a rear curved channel, 8 is an observation part, 9 is an opening edge flange,
Reference numeral 9'is a rear wall portion, 10 is a wave-dissipating ridge, 11 is an impeller, 12 is a drive device, 14 and 15 are flow guide plates, 15 'is an outermost flow guide plate, 16 is a rectifying honeycomb plate, 17 is a throttle part. , 18 is a bubble discharge port, 19 is a stagnation part, and 20 is a contact point.
Claims (1)
部湾曲水路とから竪型回流式水槽本体を構成すると共
に、上記上部水路と底面を全長に亘り段差のない平面と
し、後部湾曲水路の上壁面を上流へ向けて緩やかな上り
勾配とし、上記上部水路に上部を開口した観測部を設
け、該観測部の上部開口を形成する開口縁フランジの後
壁部を観測部上流側へ下向きに張出させて該張出し部上
に消波構造を設け、上記下部水路に複数の水流発生用イ
ンペラを並列配設し、上記前後部湾曲水路に、内側より
外側へ向けて間隔が広くなるよう夫々導流板を配置し
て、前記湾曲水路内の導流板を前部湾曲水路入口より出
口に至る長さとし、後部湾曲水路内の導流板のうちの最
外側導流板の上流側端部を上記後部湾曲水路上壁面に対
する水面の接点より上流側へ下向きに延在するよう配置
し、且つ該最外側導流板の下流側端部を後部湾曲水路の
後壁面に近付けて絞り部を作ることにより最外側導流板
の外側に水流の澱み部を形成し、後部湾曲水路上壁部の
該澱み部上方位置に気泡排出口を設け、更に上記前記湾
曲水路と上部水路との間に、整流装置を設置したことを
特徴とする回流式水槽。1. A vertical circulation type water tank main body is composed of upper and lower water channels and front and rear curved water channels that connect the upper and lower water channels, and the upper water channel and the bottom surface are flat with no step over the entire length, and the rear curve is curved. The upper wall surface of the water channel is made a gentle upward slope, the observation section with the upper opening is provided in the upper water channel, and the rear wall of the opening edge flange that forms the upper opening of the observation section is located upstream of the observation section. A wave-dissipating structure is provided on the projecting portion by projecting downward, a plurality of water flow generating impellers are arranged in parallel in the lower water channel, and the front and rear curved water channels are widened from the inner side toward the outer side. Each of the flow guide plates is arranged such that the flow guide plate in the curved water channel has a length from the front curved water channel inlet to the outlet, and the upstream side of the outermost flow guide plate of the flow guide plates in the rear curved water channel. The end is upstream from the contact point of the water surface with respect to the upper wall surface of the rear curved waterway. Is arranged so as to extend downward to the outermost guide plate, and the downstream end of the outermost guide plate is brought closer to the rear wall surface of the rear curved water channel to form a constricted portion, thereby forming a stagnation part of the water flow on the outer side of the outermost guide plate. And a bubble outlet is provided at a position above the stagnation portion of the upper wall of the rear curved water channel, and a rectifying device is installed between the curved water channel and the upper water channel.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31545186A JPH076298B2 (en) | 1986-12-29 | 1986-12-29 | Circulating water tank |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP31545186A JPH076298B2 (en) | 1986-12-29 | 1986-12-29 | Circulating water tank |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS63167847A JPS63167847A (en) | 1988-07-11 |
JPH076298B2 true JPH076298B2 (en) | 1995-01-30 |
Family
ID=18065523
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP31545186A Expired - Lifetime JPH076298B2 (en) | 1986-12-29 | 1986-12-29 | Circulating water tank |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH076298B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101186138B1 (en) | 2010-12-15 | 2012-09-27 | 한국건설기술연구원 | Test-channel device for revetment stability assessment |
-
1986
- 1986-12-29 JP JP31545186A patent/JPH076298B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPS63167847A (en) | 1988-07-11 |
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