JP2004011631A - Caseless circulation pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pump having a high circulation efficiency instead of its small capacity and extremely simplified structure for allowing to manufacture the pump at a low cost and capable of coping with lake purification because of its excellent cost effectiveness. <P>SOLUTION: A rotor capable of revolving around a vertical shaft is positioned at a water surface so that a part of it sticks out of the water and a part of it is down in the water. The rotor is pivoted above the water surface and has a vertical passage with a downward opening below the water surface and slanting passages for branched from the vertical passage below the water surface. The slanting passages have water passages in a simple shape which are connected to sprinkling ports above the water surface. Basic structure is a circulation pump without a case which can be manufactured at a very low cost. The caseless pump includes rotor revolution mechanism with a windmill and sprinkle tubes increased in angles of the slating passages. <P>COPYRIGHT: (C)2004,JPO

Description

【００１５】
斜め通路１４の上端の撒水口１６の入口まで水で満たされている時、その水に
作用する遠心力の合計ΣＦは、
【数１】においてＦをｚ＝０からｚ＝ｚ_ｗ＋ｚ_ａまでの間につき積分した数値となる。この式は
【数２】に示す通りである。
【００１６】
【数２】

【００１７】
ただし、
【数２】において、ρ：水の密度、Ａ：斜め通路１４をＸ軸と平行に切断した断面積とする。ΣＦにｓｉｎθ_１を乗じた、ΣＦの斜め通路１４方向成分が、斜め通路１４内の静水面より上にある水の自重成分（ρｇＡｚ_ａ）よりも大きくなれば、斜め通路１４内部の水は上に向かって押し上げられる。この時の
条件は
【数３】となる。
【００１８】
【数３】

【００１９】
【数３】からθ_１を求めると
【数４】が導かれる。
【００２０】
【数４】

【００２１】
即ち、斜め通路１４の角度を
【数４】によって決定すれば、ポンプは自給起動できる。
【００２２】
次にθ_２の決定条件を述べる。前記の遠心力Ｆを表す
【数１】は、撒水管２０内部でも成立する。遠心力の流路方向成分が自重の流路方向成分より大きければ、撒水管２０内部に存在する物体は放出されることになる。この点を数式で表現すると
【数５】となる。
【００２３】
【数５】

【００２４】
θ_２につき整理すると更に
【数６】で表現される。
【００２５】
【数６】

【００２６】
ここでｒの値は撒水口１６の値とするから、（ｚ_ｗ＋ｚ_ａ）にｔａｎθ_２を乗じた値となる。このｒ値を
【数６】に代入すると
【数７】となり、最終的にθ_２は
【数８】で導かれる条件を満たせばよいことになる。
【００２７】
【数７】

【００２８】
【数８】

【００２９】
この
【数８】の関係が成り立てば、撒水管２０内部の物質は、比重の大小に関係無く何でも撒水管２０の外部に放出されることになる。
【００３０】
次いで、本発明の作用の量的な検証には、具体的な数値を当てはめた計算値により確かめてみたい。そのためには第一に先の図１で示した風車の仕様値から示す必要がある。前羽根１と後羽根２の直径は６３５ｍｍ（２５インチ相当）とし、３枚ブレード型風車の風力変換効率を３５％とすると、風車の受風面積は０．３１６ｍ^２であるから、風速４ｍ／ｓにおいて約４．２ｗ（６００ｒｐｍ）の動力Ｐ_ｅが得られる。空気密度をρ＝１．１９６ｋｇ／ｍ^３として
【数９】による計算結果を示す。
【００３１】
【数９】

【００３２】
このおよそ４ｗの動力を歯車装置で１／５の１２０ｒｐｍに減速してポンプロータ１２を回転させることとする。この時垂直回転軸７は角速度が１２．６ｒａｄ／ｓになっており、ｚ_ｗ＝０．２ｍ，ｚ_ａ＝０．０５ｍを
【数４】に代入すると、θ_１≧１７．５°となるので、θ_１を２０°に決定する。更に残りの撒水管２０の傾斜角度θ_２を
【数８】によって求めると、θ_２≧２６．５°となるので、θ_２を３０°に決定する。
【００３３】
次いで斜め通路１４の寸法を直径０．０２８ｍで２本仕様とし、その長さを０．２６５ｍ、撒水管２０の長さを０．０８ｍとすれば、１２０ｒｐｍでは水の流速は０．８１２ｍ／ｓとなり、ポンプ流量は１ｌ／ｓ　となる。１時間当りの流量に換算すれば毎時３．６トンに相当する。この時ポンプ効率を５０％と看做すと、所要動力は２．６４ｗと見積もることができる。これは風速４ｍ／ｓの時の風車出力４．２ｗに比較すると十分に小さな動力なので、想定風速の下で実施例の風車は確実にポンプ所要動力を供給することができる。
【００３４】
図３には、ケースレス循環ポンプの基幹部品であるロータ１２において、内蔵する斜め通路１４の数を２本から６本に増大させた場合の実施例の斜視図である。図２の実施例に比較すると、垂直通路１５の断面積は３倍に増大されている。撒水管２０は１本のみを記し、残りは複雑な図面とならないように省略して示している。斜め通路１４や撒水管２０の寸法と傾斜角度を図２と同様にすれば、直径１，１００ｍｍ程度の風車で駆動できるより大出力のポンプとなり、図２実施例の３倍程度の容量のポンプになる。海面での養殖用には、こちらの方が適しているかもしれない。この他にも、直線状の斜め通路１４をより複雑な３次元的曲線として若干の性能向上を図ることも可能であるが、本発明の実施例では何よりも経済性を重視して、極めて単純な形状で低コストにて製造できることを優先した。然し乍ら、今後の性能改善モデルも本発明の中に含まれることは自明である。
【００３５】
最後に図４で例示するのは、従来技術を使用した湖沼浄化用のプロペラ型循環ポンプシステムである。従来技術では、本システムで利用する様な極めて低圧の仕様では、専らプロペラ型のポンプが使用される。図４で示したように、回転軸３４により回転駆動される動力はプロペラ３１に伝えられて水を跳ね上げる形式となるが、プロペラ３１はケース３０の内部で回転し、水中の軸受３２で回転軸３４を軸止する必要があり、ケース３０と軸受３２とを連結する固定板３５が不可欠である。ケース３０は脚部３３により循環ポンプ装置全体を支えているが、長さの短い脚部３３で全体を支えることになる。このような従来技術によれば、水中で軸受３２を作動させなければならないという厄介な問題と、水中の植物類が固定板３５に引っ掛かってしまうという、手間の掛る面倒な問題を抱え込まざるを得ない。加えて複雑な３次元構造であるプロペラ３１を初めとする高価な部品を製造し、組み立てる作業によって、図２の本発明ロータ１２に比較すれば、比較にならない高コストを余儀なくされることは明らかであろう。
【００３６】
【発明の効果】
本発明のケースレス循環ポンプによれば、湖沼浄化システムの構築に適した、極めて安価な単純構造の保守が殆ど不要な低圧ポンプを提供することが可能になり、風力のような自然エネルギーを利用して運転コストの全く掛らない、世界の多くの低開発国でも多数設置することが可能となる循環ポンプを実現できた。本発明のケースレス循環ポンプを利用した湖沼水質浄化システムにおいて、直径６３５ｍｍの風車を利用すれば、風速４ｍ／ｓの風力で毎時３．６トンの水を循環させることで酸素含有濃度を向上し、好気性微生物の活性化を図り、水質浄化に資することができる。直径１．１ｍの風車では処理水量も同一風力で３倍の毎時１０．８トンとなり、海面を利用する養殖業においても、海水の富栄養化によってもたらされるラフィド藻類の異常繁殖による赤潮発生にブレーキを懸けることが期待でき、別けても水中酸素の欠乏から魚類が全滅することを避けることができる。淡水におけるアオコ対策においても全く同様の大きな効果が期待できる。特に、受益者が特定できない環境対策分野における、著しいコストダウンを可能とすることで、安価な低容量装置の分散配置を実現できることから、世界に向けた全く新しい市場を創出することによる経済的効果は極めて大きいと考えられる。
【図面の簡単な説明】
【図１】本発明のケースレス循環ポンプと風車による駆動機構とを組み合わせた、湖沼水質浄化のための環境対策システムとして応用した一実施例の縦断面図である。
【図２】本発明のケースレス循環ポンプの根幹をなすロータの一実施例の縦断面図である。
【図３】図２のロータの斜め通路を３倍の６本としたロータの一実施例の斜視図である。
【図４】従来技術の低圧プロペラポンプを使用した湖沼浄化システムの縦断面図である。
【符号の説明】
１　風車の前羽根
２　風車の後羽根
３　風車の水平回転軸
４　ピニオン
５　フェイスギヤ
６　水平軸ケース
７　垂直回転軸
８　旋回軸
９　垂直柱
１０　脚部
１２　ポンプのロータ
１３　垂直通路
１４　斜め通路
１５　開口
１６　撒水口
１７　スタピライザー
１８　池底に置かれるブロック
１９　ターンバックル
２０　撒水管
２１　垂直回転軸の摺動支持部
３０　従来技術の低圧ポンプのケース
３１　従来技術の低圧ポンプのプロペラ
３２　軸受
３３　脚部
３４　回転軸
３５　固定板TECHNICAL FIELD OF THE INVENTION
[0001]
The present invention relates to a circulation pump suitable for environmental protection, which uses a natural energy such as wind power to generate a forced circulation flow of water having a high oxygen content on a still water surface such as a lake or a pond. Also involved in the aquaculture of fish and other fish on the water surface and sea surface, and involved in a natural energy-based circulating pump that can also be used as an aeration device to protect fish from lack of oxygen in freshwater and seawater due to abnormal reproduction of monoalgae. I do.
[0002]
[Prior art]
Equipment for improving the environment related to water uses water purification plants for securing drinking water and large-scale systems for sewage treatment, and natural energy can be used outside of drinking water purifiers. Such a small device has not been realized at all. The economic effects cannot be estimated in projects where the beneficiaries cannot be identified, such as purifying lakes and marshes, and it is considered that high-cost systems have no room for social acceptance. A system aiming at environmental improvement may be meaningless if accompanied by emission of global warming gas. Therefore, a system that can utilize natural energy as much as possible is desirable. Since the problem of conventional renewable energy utilization was to overcome high costs, the world trend has been toward increasing single-unit capacity in order to achieve economies of scale. However, in order to improve the water environment on a global scale, it is desirable to use small-capacity machines in a distributed manner, and it has been desired to solve problems from a new viewpoint.
[0003]
In the aquaculture industry, small-scale equipment has been put into practical use. Especially in eel farming ponds, small devices are used, in which impellers rotating around the horizontal axis scratch the water surface and jump up water.However, the system is driven by a small electric motor, and natural energy is not used. Not done. On the other hand, aquaculture such as hamachi using the sea surface has been suffering from red tide damage. He pondered the algae aggressively and ate it in a wide cage, reflecting on the fact that it was a mistake to cultivate it densely in a small cage and give drugs such as antibiotics in case of disease. Attempts have been made to achieve a natural circulation of food and dung, but a complete aquaculture method has not yet been established, and it is considered that red tide countermeasures are almost unsatisfactory.
[0004]
[Problems to be solved by the invention]
A first problem to be solved by the present invention is to realize a pump having a high circulation efficiency while having an extremely simplified structure even with a small capacity. The aim is to make pump production at an extremely low cost and to meet the demand for environmental measures for lake purification through excellent cost performance. A second problem is to provide a circulating pump system that can reduce the operating cost and the emission of greenhouse gases to zero by realizing a circulating pump that can use natural energy such as a windmill.
[0005]
[Means for Solving the Problems]
In order to solve such a problem, the inventor has conceived a very simple pump type having only a rotating rotor without a case. That is, the rotor is basically fixed to the lower end of a rotating shaft that is supported on the water surface and rotates underwater, has a downward opening at the lower end of the rotor, and has a vertical passage connected to the opening, and the vertical passage This is a basic structure of a caseless circulation pump that bends or branches at a certain angle to form an oblique passage, extends further upward, and continues to the water spouting port of the rotor opened above the water surface. The certain angle of the oblique passage is an angle at which the upward flow of water occurs in the passage due to the centrifugal force acting on the water inside the oblique passage due to the rotation of the rotor. If the angle is small, the ascending flow will not occur unless it rotates quickly.If the angle is large, the ascending flow will occur even at a slower rotation speed, but in practice the angle is set so that the ascending flow occurs at the assumed rated speed I do. The vertical passage that opens toward the water has a structure in which the rotation axis and the central axis are shared, and by achieving a smooth surface of the entire passage, high circulation efficiency of the pump can be achieved.
[0006]
In consideration of utilizing wind power of about several watts, which has been rarely used in the past, as a driving source of such a circulation pump, the horizontal axis of the small windmill and the rotation axis of the caseless circulation pump were connected by a gear device. It is assumed that a small wind turbine with a diameter of about 60 cm can drive the pump with a sufficient margin if the wind speed is about 4 m / s. The assumed pump shaft rotation speed in this case is 120 rpm.
[0007]
Since this type of device needs to be maintenance-free and requires no effort, it is desired that the device has a structure in which foreign matter does not adhere to the passage through which water passes. Basically, if the passage itself is simple, it is easy to respond to such a request, but the inventor can use the difference in specific gravity with water to positively discharge even pebbles etc. inside the passage. I thought about it. Specifically, it is considered that this problem can be solved by giving an angle near the end of the diagonal passage near the water spout so that a larger centrifugal force acts.As a result, the water velocity at the water spout can be further increased. Speeding up.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
The first embodiment of the present invention assumes a model for the purification of lakes and marshes on the inland water surface that is fresh water, and exemplifies an embodiment that can be installed on the inland water surface with a relatively shallow depth. This embodiment is also applicable to eel farms and prawn farms that use seawater ponds near the coast. In addition to the above, an embodiment for the aquaculture of fish on the sea surface is also conceivable. In this case, an embodiment using a float or an anchor is used, but is not shown here. In order to exemplify a system for purifying the water quality of lakes, marshes and ponds, which is one of the final objects of the present invention, various fungi, algae, planktons and the like in the natural world which actually play a role of water purification are used. Although an embodiment in which a carrier of microorganisms constituting the activated sludge of the present invention is combined with a circulation pump system is also required, since the present invention is an application only for a mechanical device body called a caseless circulation pump, the entire purification system is exemplified. I haven't.
[0009]
【Example】
One embodiment of the present invention shown in FIG. 1 is an embodiment in which a caseless circulating pump driven by a windmill is shown in a cross-sectional view as viewed from the side, and is installed on a water surface such as a shallow pond. The upper windmill is composed of a front blade 1 and a rear blade 2, and a horizontal rotating shaft 3 constituting a rotating shaft of the windmill is a hollow turning shaft 8 which can turn around a vertically installed vertical column 9. , And is rotatably fixed by a horizontal shaft case 6 integrated with the turning shaft 8. Inside the vertical column 9, the vertical rotation shaft 7 of the pump main body, which is fixed at the upper end to the face gear 5 and is rotated at a reduced speed by meshing the face gear 5 with the pinion 4 fixed to the horizontal rotation shaft 3, is rotatable. The lower end of the vertical rotary shaft 7 is fixed to a rotor 12 of a caseless circulating pump which is disposed above and below the water surface. The leg 10 for fixing the vertical column 9 is supported at the lower end by a block 18 placed on the bottom of the pond, and supports the entire circulating pump device including the windmill. The vertical column 9 is slidably supported by two support portions by the leg portions 10, and the height of the support can be adjusted by the turnbuckle 19, so that the vertical column 9 can cope with changes in the water surface. The inside of the rotor 12 constituting the main body of the pump has a vertical passage 13 extending upward from an opening 15 having a common central axis with the vertical rotation shaft 7 and facing downward in water, and is connected to an oblique passage 14. I have. The diagonal passage 14 further extends beyond the water surface and above the water surface, and continues to the water spout 16. The front blade 1 rotates in response to the wind from the left and rotates the horizontal rotation shaft 3. The rear blade 2 attached to the right end of the horizontal rotation shaft 3 generates a large rotation moment around the rotation shaft 8. It has a sufficient distance from the pivot 8 so as to cause the rotation. Therefore, when the rear blade 2 receives the wind, it plays a role of changing the direction of the horizontal rotation axis 3 so that the front blade 1 faces the wind from the front.
[0010]
It is considered that the entire structure of the caseless circulating pump rotationally driven by the windmill shown in FIG. 1 and its functions are simple and clear and easy to understand. When the front blade 1 and the rear blade 2 receive wind force and rotate, the vertical rotation shaft 7 is rotated by the engagement of the pinion 4 and the face gear 5. Since the rotor 12 of the pump disposed above and below the water surface is fixed to the lower end of the vertical rotation shaft 7, the rotor 12 also rotates. The water in the oblique passage 14 inside the rotor 12 receives centrifugal force due to the rotational angular velocity according to the distance from the central axis due to the rotation of the rotor 12, and the centrifugal force is equal to or higher than the water pressure corresponding to the water level from the water surface to the sprinkling port 16. When the power becomes strong, an upward flow from bottom to top occurs, and the self-sufficient start as a pump is started. As a result, water is sprayed from the rotating water spouting port 16, and water from the pond is taken into the vertical passage 13 from the downward opening 15, and further, an upward flow toward the oblique passage 14 occurs. The water falling from the water spout 16 onto the surface of the water falls into the water while entraining the surrounding air itself in contact with the water, so that the oxygen content concentration in the water can be efficiently increased. Since the height from the water surface to the spout 16 is extremely low, the air entrained in the water at this time becomes bubbles near the water surface, and immediately rises and is reduced to the atmosphere. However, when the oxygen concentration near the water surface increases, It is thought that this gradually diffuses into the water. The background of this is that the rate of dissolution of atmospheric oxygen into water on a still water surface is extremely low, whereas the dynamic contact with bubbles causes oxygen of air to enter the water incomparably fast. There is a phenomenon of melting.
[0011]
In general, static water surfaces such as lakes and ponds tend to be divided into aerobic water areas on the water surface side and anaerobic water areas on the bottom side as they are, and anaerobic when the water surface is quiet for a long period of time. It is thought that sex waters will spread. Eutrophication of water is progressing in various parts of the world, and when rafid algae that feed on organophosphorus and the like breed, they cause water bloom (blue-green algae) and red tide. It is thought to have caused death. The world of microorganisms including algae, plankton, and arthropods, as well as anaerobic fungi that were active in ancient times when oxygen was scarce in the atmosphere, aerobic fungi that has evolved in a new era, The balance is what constitutes the current environment, and the problem is extremely complex. For example, anaerobic photosynthetic bacteria also reduce toxic hydrogen sulfide to sulfur and hydrogen. However, a method that can be easily implemented for water purification would be a method similar to the activated sludge method widely used for sewage treatment and the like. Its active ingredients range from aerobic fungi, algae, plankton and arthropods, but are basically aerobic activated by aeration, and actively use natural energy as in the present invention. An inexpensive device that can be used to expand aerobic waters would provide one of the leading solutions to cost problems. For example, paying attention to plankton, plankton, an organism that evolved more than fungi and monoalgae, has evolved to greatly expand the range of food prey by increasing self-propulsion, so the underwater system shown in Fig. 1 If the oxygen concentration is maintained so that it can be actively activated, it will be able to maintain forever while activating the lake purifying action of plankton that feeds on itself. Furthermore, in the Japanese mountain stream, diatoms attached to the surface of countless stones participate in the purification of the mountain stream and the food chain such as ayu, and as a carrier carrying aerobic bacteria and diatoms, plastics are used. It is also possible to construct a lake and marsh purification system in which nets are filled with pebbles, coal ash and blast furnace slag, and are packed with uneven lumps on the surface and placed near the surface of water to be sprayed. Such details may be appropriately selected according to the actual conditions of the lakes and marshes to be actually installed.
[0012]
Even when the apparatus shown in FIG. 1 is used for aquaculture ponds such as eel and prawns, it is considered to be an attractive water purification apparatus because it enables the use of natural energy without energy cost. In particular, since the food of shrimp is plankton, the apparatus of FIG. 1 is suitable for shrimp cultivation. In addition, it is possible to install such a device using a float or an anchor even in a farm using the sea surface, and it is considered that the enormous damage due to the red tide can be reliably avoided.
[0013]
FIG. 2 is an enlarged view of the rotor 12 constituting the backbone of the caseless circulation pump of the present invention. Considering that it can be used in seawater at the same time, it is considered that this material is superior to rust-free resin, including cost. The vertical passage 13 opened downward in the water has a flange-shaped stabilizer 17 around the opening 15 so as to avoid closing the opening 15 with plants or the like, but extends upward as described above. The oblique passage 14 branches in the water. The center axis of the vertical rotation shaft 7 and the center axis of the vertical passage 14 coincide with each other, and the angle between the rotation center axis of the rotor 12 and the center axis of the oblique passage 14 is θ ₁ , which is set at the upper end of the oblique passage 14. the watering hole 16 itself to be connected to form a watering pipe 20 having a short length, when the center axis of the watering pipe 20 and ₂ the angle between the rotating axis center theta, and how these two angles I will explain whether to decide. A Z-axis (same as the rotation axis) extending vertically upward from the origin 0 in FIG. 2 and an X-axis which is a horizontal axis intersecting the origin 0 are defined. The centrifugal force F acting on the water having the mass m is densely displayed when all the vectors are described in the figure, so that the centrifugal force F is symmetrically dispersed and displayed.
## EQU1 ##
[0014]
(Equation 1)

[0015]
When the water is filled up to the inlet of the water spout 16 at the upper end of the diagonal passage 14, the total centrifugal force 力 F acting on the water is:
A numerical value obtained by integrating per between the F from z = 0 to _{z = z} w + _{z a} in [number 1]. This equation is as shown in the following equation.
[0016]
(Equation 2)

[0017]
However,
In Equation 2, ρ is the density of water, and A is the cross-sectional area of the oblique passage 14 cut parallel to the X axis. Multiplied by sin [theta ₁ to .SIGMA.F, oblique passage 14 direction component of .SIGMA.F is, the greater than self-weight components of the water is above the still water surface in the oblique passage 14 (ρgAz _a), the oblique passage 14 inside the water above Is pushed up towards. The condition at this time is as follows.
[0018]
[Equation 3]

[0019]
When θ ₁ is obtained from Equation 3, the following Equation 4 is derived.
[0020]
(Equation 4)

[0021]
That is, if the angle of the oblique passage 14 is determined by the following equation, the pump can be activated by self-supply.
[0022]
Then describe theta ₂ of the determination condition. ## EQU1 ## representing the centrifugal force F is also established inside the sprinkler tube 20. If the flow direction component of the centrifugal force is larger than the flow direction component of its own weight, the object existing inside the sprinkling pipe 20 will be discharged. This point is expressed by the following equation.
[0023]
(Equation 5)

[0024]
is expressed in a more [6] and to organize per θ _2.
[0025]
(Equation 6)

[0026]
Since here the value of r is the value of the watering nozzle _16, a value obtained by multiplying the tan .theta ₂ to _(z w + z _a). By substituting this r value into the following equation, the following equation is obtained, and finally, θ ₂ only needs to satisfy the condition derived by the following equation.
[0027]
(Equation 7)

[0028]
(Equation 8)

[0029]
If this relationship is established, anything in the sprinkler tube 20 will be discharged out of the sprinkler tube 20 regardless of the specific gravity.
[0030]
Next, in quantitative verification of the operation of the present invention, it is desirable to confirm the calculated value by applying specific numerical values. For that purpose, first, it is necessary to show the specification values of the windmill shown in FIG. The diameter of the front blade 1 and rear blades 2 and: 635 mm (25 inches or equivalent), the wind conversion efficiency of the three-blade wind turbine is 35%, since swept area of the wind turbine is 0.316M ^2, wind speed 4m / power _{P e} of about 4.2 W (600 rpm) at s is obtained. The calculation result by the following equation is shown when the air density is ρ = 1.196 kg / m ³ .
[0031]
(Equation 9)

[0032]
The power of about 4 w is reduced to 120 rpm at 1/5 by a gear device to rotate the pump rotor 12. At this time, the angular velocity of the vertical rotation shaft 7 is 12.6 rad / s, and when z _w = 0.2 m and z _a = 0.05 m are substituted into the following equation, θ ₁ ≧ 17.5 °. since, to determine the theta ₁ to 20 °. Further, when the inclination angle θ ₂ of the remaining water sprinkling pipe 20 is obtained by the following equation, θ ₂ ≧ 26.5 °, so θ ₂ is determined to be 30 °.
[0033]
Next, assuming that the size of the diagonal passage 14 is 0.028 m in diameter and the length thereof is 0.265 m and the length of the sprinkling pipe 20 is 0.08 m, the flow rate of water at 120 rpm is 0.812 m / s. And the pump flow rate is 1 l / s. When converted to the flow rate per hour, it is equivalent to 3.6 tons per hour. At this time, assuming that the pump efficiency is 50%, the required power can be estimated to be 2.64 W. This is a sufficiently small power compared to the wind turbine output of 4.2 w at a wind speed of 4 m / s, so that the wind turbine of the embodiment can reliably supply the required power of the pump under the assumed wind speed.
[0034]
FIG. 3 is a perspective view of an embodiment in which the number of built-in oblique passages 14 is increased from two to six in the rotor 12 which is a main component of the caseless circulation pump. Compared to the embodiment of FIG. 2, the cross-sectional area of the vertical passage 15 is increased by a factor of three. Only one sprinkling tube 20 is shown, and the rest are omitted to avoid a complicated drawing. When the size and the inclination angle of the oblique passage 14 and the water sprinkling pipe 20 are the same as those in FIG. 2, the pump can be driven by a windmill having a diameter of about 1,100 mm and has a larger output. become. This may be more suitable for aquaculture at sea. In addition to this, it is possible to slightly improve the performance of the linear oblique passage 14 as a more complicated three-dimensional curve. Priority was given to being able to manufacture at low cost with a simple shape. However, it is obvious that future performance improvement models are also included in the present invention.
[0035]
Finally, illustrated in FIG. 4 is a propeller-type circulating pump system for lake purification using the prior art. In the prior art, propeller type pumps are exclusively used for extremely low pressure specifications such as those used in the present system. As shown in FIG. 4, the power rotationally driven by the rotating shaft 34 is transmitted to the propeller 31 to take up water, but the propeller 31 rotates inside the case 30 and rotates by the underwater bearing 32. It is necessary to fix the shaft 34, and a fixing plate 35 for connecting the case 30 and the bearing 32 is indispensable. The case 30 supports the entire circulating pump device by the legs 33, but the entire length is supported by the short legs 33. According to such a conventional technique, it is necessary to have a troublesome problem that the bearing 32 must be operated in water and a troublesome and troublesome problem that plants in water are caught on the fixing plate 35. Absent. In addition, by manufacturing and assembling expensive parts such as the propeller 31 having a complicated three-dimensional structure, it is apparent that, when compared with the rotor 12 of the present invention in FIG. Will.
[0036]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to the caseless circulating pump of this invention, it becomes possible to provide the low-pressure pump suitable for construction of a lake and marsh purification system which requires almost no maintenance of an extremely inexpensive simple structure, and utilizes natural energy such as wind power. As a result, a circulating pump that can be installed in many low-developed countries around the world without operating costs was realized. In the lake water purification system using the caseless circulation pump of the present invention, if a wind turbine having a diameter of 635 mm is used, the oxygen content is improved by circulating 3.6 tons of water per hour at a wind speed of 4 m / s. It can activate aerobic microorganisms and contribute to water purification. With a 1.1 m diameter wind turbine, the amount of treated water is tripled to 10.8 tons per hour with the same wind power. In the aquaculture business using the sea surface, there is a brake against red tide generation due to abnormal breeding of raffid algae caused by eutrophication of seawater. It can be expected that the fish will be completely annihilated due to lack of oxygen in the water. Exactly the same great effect can be expected in the control of blue-green algae in freshwater. In particular, in the field of environmental measures where the beneficiaries cannot be identified, remarkable cost reduction is possible, and the distributed arrangement of inexpensive low-capacity devices can be realized. Therefore, the economic effect of creating an entirely new market for the world Is considered to be extremely large.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of one embodiment in which a caseless circulation pump of the present invention is combined with a drive mechanism using a windmill and is applied as an environmental measure system for lake water purification.
FIG. 2 is a vertical cross-sectional view of one embodiment of a rotor forming the basis of the caseless circulation pump of the present invention.
FIG. 3 is a perspective view of an embodiment of a rotor in which the number of oblique passages of the rotor of FIG. 2 is tripled to six.
FIG. 4 is a longitudinal sectional view of a lake purification system using a low-pressure propeller pump according to the prior art.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Front blade of windmill 2 Rear blade of windmill 3 Horizontal rotation axis 4 of pinwheel 5 Pinion 5 Face gear 6 Horizontal axis case 7 Vertical rotation axis 8 Revolving axis 9 Vertical column 10 Leg 12 Pump rotor 13 Vertical passage 14 Diagonal passage 15 Opening Reference Signs List 16 water spouting port 17 stabilizer 18 block placed at the bottom of pond 19 turnbuckle 20 water sprinkling pipe 21 sliding support part of vertical rotating shaft 30 case of prior art low pressure pump 31 propeller of prior art low pressure pump 32 bearing 33 legs 34 rotation Shaft 35 Fixed plate

Claims (3)

A vertical passage opening downward in the water and having a length of about 1/4 or more of the entire length of the pump rotor; and a passage bent or branched from the vertical passage, the water flow rising from the center axis of the vertical passage below the water surface due to centrifugal force generated by the rotor rotation. A diagonal passage having a distance sufficient to generate the water, and a spout port connected to the diagonal passage and opened obliquely upward on the water surface, and the center of the vertical passage center axis in the air at a distance from the water surface Caseless circulating pump consisting of a rotor body supported by a rotating shaft A leg and a vertical column that pivotally support a rotating shaft that projects vertically above the water surface, a horizontal rotating shaft that is rotatably held around the vertical column above the vertical column, and fixed to the tip of the horizontal rotating shaft. A windmill, and a gear mechanism for connecting the vertical and horizontal rotating shafts, having a common central axis with the vertical rotating shaft, opening downward in the water, and having a length of about 1/4 or more of the entire length of the pump rotor. A vertical passage, a diagonal passage bent or branched from the vertical passage, and a diagonal passage having a distance sufficient to generate a rising water flow by centrifugal force due to rotor rotation from the vertical passage central axis below the water surface, and connected to the diagonal passage. Caseless circulating pump having a sprinkler port opened diagonally upward on the water surface, and The angle of the discharge pipe near the spouting port has an angle that is greater than the angle of the diagonal passage to the angle at which this mixture, which has a higher specific gravity than water, can be discharged by centrifugal force even if pebbles and gravel are mixed inside the passage. The caseless circulating pump according to claim 1 or 2, wherein

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