JP2006274706A - River water intake facility and dust removing screen used for this - Google Patents

River water intake facility and dust removing screen used for this Download PDF

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JP2006274706A
JP2006274706A JP2005097172A JP2005097172A JP2006274706A JP 2006274706 A JP2006274706 A JP 2006274706A JP 2005097172 A JP2005097172 A JP 2005097172A JP 2005097172 A JP2005097172 A JP 2005097172A JP 2006274706 A JP2006274706 A JP 2006274706A
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water
river
dust
intake
screen
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Akira Sei
章 静
Yoshiichi Takei
芳一 武井
Satoru Inagawa
悟 稲川
Ichiro Kono
一郎 河野
Satoshi Akagi
里至 赤城
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Tokyo Electric Power Company Holdings Inc
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Tokyo Electric Power Co Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology for reducing dust flowing into a water intake port introducing the water, and for reducing the work for treating the removed dust, in a small-scaled water intake facility in a mountain stream or the like. <P>SOLUTION: The river water intake facility 10 in a small river like the mountain stream or the like comprises the water intake port 2 for introducing the water flowing in the river, and a dust removing screen 1 arranged substantially parallel to a water surface L of the river near an upper end of the water intake port 2. A plurality of hole parts are formed in the screen 1, and the water intake port 2 introduces the water passing downward through the hole parts of the screen 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、渓流等小規模な河川における取水設備に関するものである。   The present invention relates to water intake equipment for small rivers such as mountain streams.

水力発電所等における渓流等小規模な河川の取水設備では、河川横断方向に取水堰堤を設け、この取水堰堤の上流に取水口を設置し、制水門の開閉等により取水量を調整して本川導水路に導水する。前記取水口の前面には、河川内を流下してくる流木や落ち葉等の塵芥や土砂が本川に流入することを防止するためスクリーンが設けられている。このスクリーンは、短冊形の平鋼を所定のピッチで並べた構造で、水はこのスクリーンバーの目を通過するが、塵芥は通さない仕組みになっており、取水口の開口部を塞ぐように配置されている。そのため、河川内を流下する塵芥や土砂は、スクリーン前面に留まり、本川内への塵芥等の流入が防止されていた。   In intake facilities for small rivers such as mountain streams in hydroelectric power stations, etc., a water intake dam is installed in the direction crossing the river, a water intake is installed upstream of this water intake dam, and the water intake is adjusted by opening and closing the water control gate. Water is introduced into the river channel. A screen is provided in front of the water intake to prevent dust and sand such as driftwood and fallen leaves flowing down the river from flowing into the main river. This screen has a structure in which strip-shaped flat steel is arranged at a predetermined pitch, and water passes through the eyes of the screen bar, but does not allow dust to pass through, so as to block the opening of the intake port. Has been placed. For this reason, dust and earth and sand flowing down in the river stayed in front of the screen, preventing the inflow of dust and the like into the main river.

しかし、前記取水設備では、スクリーン前面に塵芥等が溜まるため、使用経過に伴いスクリーンの目詰まりを起こし、十分な取水量を得ることができなくなることがあった。従って、一定期間毎にスクリーン前面の塵芥を除去する必要があり、除去作業による取水設備の停止及び作業コストの増大等の問題があった。   However, in the water intake facility, dust or the like accumulates on the front surface of the screen, which may cause clogging of the screen with the progress of use, and a sufficient water intake amount may not be obtained. Therefore, it is necessary to remove dust on the front surface of the screen every certain period, and there are problems such as stoppage of water intake equipment due to removal work and increase in work cost.

一方、大規模な本川取水設備では、滞留した塵芥等を除去するための排砂門や除塵機が設けられていることが多いため、滞留した塵芥等を除去することができる。しかし、渓流等小規模な河川取水設備では、前記排砂門や除塵機等の滞留した塵芥を除去する設備が備わっていないことが多く、前記問題を解決することは困難であった。   On the other hand, a large-scale main river intake facility is often provided with a sand removal gate or dust remover for removing the accumulated dust and the like, so that the accumulated dust and the like can be removed. However, small-scale river intake facilities such as mountain streams are often not equipped with facilities for removing accumulated dust such as the sand removal gates and dust removers, and it has been difficult to solve the above problems.

本願発明の先行技術文献としては、特許文献１が挙げられる。特許文献１には、図５に示すように、コンクリートダム取水口における水質浄化装置が記載されている。この水質浄化装置は、上流側のコンクリートダム１０１を囲んで、水を通し、石を通さない孔あき板又は鉄筋網若しくはルーバーのケーシングからなる側板１０２と天板１０３と底板１０４とにより構成された透水性筒体１０５を配設固定している。前記透水性筒体１０５の少なくとも内面に活性炭１０６を収納すると共に、透水性筒体１０５の外側周囲に多数の石１０７を配設した装置である。   Patent document 1 is mentioned as a prior art document of this invention. Patent Document 1 describes a water purification device at a concrete dam intake as shown in FIG. This water purification apparatus is composed of a side plate 102, a top plate 103, and a bottom plate 104, which are made of a perforated plate or a reinforcing bar net or a louver casing that surrounds an upstream concrete dam 101 and allows water to pass therethrough but does not pass stones. The water permeable cylinder 105 is disposed and fixed. The activated carbon 106 is housed on at least the inner surface of the water-permeable cylinder 105, and a large number of stones 107 are disposed around the outside of the water-permeable cylinder 105.

前記水質浄化装置によれば、コンクリートダム１０１の上流側に流れてきた水は、透水性筒体１０５の外側周位に配設した石１０７の中に通過し、土砂や泥分は石に遮られて侵入しにくく、一部石１０７の中に入っても途中で詰まり、透水性筒体１０５までは到達しない。一方、石１０７の中に通過した水は透水性筒体１０５に到達し、孔あき板又は鉄筋網若しくはルーバーのケーシングの側面を通って透水性筒体１０５の内部に流入し、透水性筒体１０５内の活性炭１０６によって有機成分が浄化させる。すなわち、前記水質浄化設備によれば、土砂や泥分を除去した水を取水することができた。   According to the water purification apparatus, the water flowing upstream of the concrete dam 101 passes into the stone 107 disposed on the outer periphery of the water permeable cylinder 105, and the earth and sand and mud are blocked by the stone. Therefore, even if some of the stones 107 enter, they are clogged in the middle and do not reach the water-permeable cylinder 105. On the other hand, the water that has passed into the stone 107 reaches the water permeable cylinder 105 and flows into the inside of the water permeable cylinder 105 through the side surface of the casing of the perforated plate or the reinforcing bar net or louver. Organic components are purified by activated carbon 106 in 105. That is, according to the water quality purification equipment, water from which earth and sand and mud were removed could be taken.

しかし、前記水質浄化設備は、透水性筒体１０５の外周に配設した石１０７によって土砂や泥分を除去するため、使用経過に伴い前記石１０７に土砂や泥分が溜まり、水の流入が妨げられることが考えられる。従って、前記スクリーンと同様に定期的な土砂除去を行う必要があった。
特開平５−２８５４７０ However, since the water purification equipment removes earth and sand and mud by the stone 107 disposed on the outer periphery of the water permeable cylinder 105, earth and sand and mud accumulate in the stone 107 with the course of use, and water flows in. It can be impeded. Therefore, it has been necessary to periodically remove sediment as in the case of the screen.
JP-A-5-285470

本発明は、前記問題に鑑みてなされたものであり、渓流等小規模な取水設備において、水を導水する取水口に流入する塵芥を減らすとともに、除去した塵芥の処理作業を縮減する技術を提供することを目的とする。   The present invention has been made in view of the above problems, and provides a technique for reducing the amount of dust flowing into a water intake for guiding water in a small-scale water intake facility such as a mountain stream and reducing the processing work of the removed dust. The purpose is to do.

本発明は、渓流等小規模な河川における河川取水設備であって、河川を流下する水を導水する開口部を有する取水口と、前記取水口の開口部の上端近傍に河川の水面と略平行に配置された塵芥除去スクリーンと、を備え、前記塵芥除去スクリーンは、複数の穴部が形成されており、前記取水口は、前記スクリーンの穴部から下方に通過した水を取水することを特徴とする。   The present invention is a river intake facility in a small river such as a mountain stream, and has a water intake having an opening for guiding water flowing down the river, and substantially parallel to the water surface of the river in the vicinity of the upper end of the water intake opening. A dust removal screen disposed on the screen, wherein the dust removal screen has a plurality of holes, and the water intake port takes in water that has passed downward from the holes of the screen. And

前記河川取水設備は、河川の水を導水する取水口の上端近傍に河川の水面と略平行に配置された塵芥除去スクリーンを備えており、塵芥除去スクリーンの穴部より大きな流木や落ち葉等の塵芥は、穴部を通過しないため塵芥除去スクリーン上に留まる。取水口に導入される水は、塵芥除去スクリーンの穴部から下方に通過した水であり、塵芥を除去した水を取水口から導水することができる。   The river intake facility includes a dust removal screen disposed substantially parallel to the water surface of the river in the vicinity of the upper end of a water intake for introducing river water, and dust such as driftwood and fallen leaves larger than the hole in the dust removal screen. Stays on the dust removal screen because it does not pass through the hole. The water introduced into the water intake is water that has passed downward from the hole of the dust removal screen, and the water from which the dust has been removed can be introduced from the water intake.

さらに、前記塵芥除去スクリーン上に留まった流木等、水の通過に伴う吸着力の影響をあまり受けない塵芥は、掃流機能により下流へ自然流下する。従って、取水口前面で流木や塵芥が堆積することを防ぐことができる。また、落ち葉等、水の通過に伴う吸着力の影響を受ける塵芥は、塵芥除去スクリーンの穴部に付着するが、出水時には水流により塵芥除去スクリーンの上方に浮き上がり、掃流機能により下流へ自然流下する。すなわち、塵芥除去スクリーン上に留まった塵芥は、河川の自然流下により下流へ流すことができるため、塵芥除去スクリーン上に留まった塵芥の除去作業を低減することができる。   Further, dust that is not significantly affected by the adsorption force associated with the passage of water, such as driftwood remaining on the dust removal screen, naturally flows down to the downstream by the sweep function. Therefore, it is possible to prevent driftwood and dust from accumulating in front of the water intake. In addition, dust that is affected by the adsorption force associated with the passage of water, such as fallen leaves, adheres to the hole of the dust removal screen, but when it comes out of water, it floats above the dust removal screen due to the water flow, and naturally flows downstream by the sweep function. To do. In other words, since the dust remaining on the dust removal screen can flow downstream due to the natural flow of the river, the work of removing the dust remaining on the dust removal screen can be reduced.

尚、塵芥除去スクリーンの穴部より小さく穴部を通過した土砂等の塵芥は、塵芥除去スクリーンの下方に堆積するため、必要に応じて堆積した土砂の除去をすることが望ましい。   Since dust such as earth and sand that has passed through the hole smaller than the hole of the dust removal screen accumulates below the dust removal screen, it is desirable to remove the accumulated earth and sand as necessary.

また、本発明に係る河川除去設備は、前記塵芥除去スクリーンの穴部の開口率が、０％より大きく２６％以下であることを特徴とすることが望ましい。なお、ここで前記０％よりも大きいとは、０％は含まないことはもちろんである。   In the river removal facility according to the present invention, it is desirable that the opening ratio of the hole portion of the dust removal screen is greater than 0% and 26% or less. It should be noted that the term “greater than 0%” here does not include 0%.

前記河川除去設備は、塵芥除去スクリーンを取水口の前面に河川の水面と略平行に配置することにより、塵芥除去スクリーンの穴部より大きな塵芥を除去して、この塵芥を除去した水を取水口から導水することができる。前記穴部の大きさ及び数を調整することにより、除去する塵芥の量を増やす（塵芥除去スクリーンを通過する塵芥を減らす）ことができる。   The river removal facility has a dust removal screen disposed in front of the water inlet substantially parallel to the water surface of the river to remove dust larger than the hole of the dust removal screen, and to remove the water from which the dust has been removed. Water can be led from. By adjusting the size and number of the holes, the amount of dust to be removed can be increased (the amount of dust passing through the dust removal screen can be reduced).

また、一般的な河川取水設備は、導水すべき取水量の目標値があり、取水口前面に取り付けられるスクリーンの開口率を調整して、導水すべき取水量を得られるように構成されていた。なお、ここでの開口率とは、部分開口を全面開口に置き換えた実質開口率である。   In addition, general river intake equipment has a target value for the amount of water to be introduced, and is configured to obtain the amount of intake to be introduced by adjusting the aperture ratio of the screen attached to the front of the intake. . Here, the aperture ratio is a substantial aperture ratio obtained by replacing the partial opening with the entire surface opening.

本発明に係る河川取水設備においては、前記取水量と除去する塵芥の量とを合わせて調整する必要があり、例えば、塵芥除去スクリーンの開口率が高すぎると、流入する水による吸着率が高くなる。この吸着力が高くなると、上流側での塵芥の付着が顕著になり、下流側に水切れが生じ取水量が減少する。   In the river intake facility according to the present invention, it is necessary to adjust the amount of water intake and the amount of dust to be removed. For example, if the opening ratio of the dust removal screen is too high, the adsorption rate by the inflowing water is high. Become. When this adsorption force becomes high, the adhesion of dust on the upstream side becomes conspicuous, water runs out on the downstream side, and the amount of water intake decreases.

本出願人は、後述する実験例で複数パターンの開口率の塵芥除去スクリーンを用いて取
水実験を行い、本発明に係る塵芥除去スクリーンの好適な開口率を得た。開口率の好ましい範囲は、０％より大きく２６％以下であり、より好ましい範囲は、４％〜９％であり、最も好ましい範囲は、４．５％〜５．０％である。前記開口率の塵芥除去スクリーンを用いることにより、水の流量が少ない場合であっても、大きな取水能力及び掃流能力を発揮することが可能となる。 The present applicant conducted a water intake experiment using a dust removal screen having a plurality of patterns of aperture ratios in an experimental example to be described later, and obtained a suitable aperture ratio of the dust removal screen according to the present invention. A preferable range of the aperture ratio is greater than 0% and 26% or less, a more preferable range is 4% to 9%, and a most preferable range is 4.5% to 5.0%. By using the dust removal screen having the opening ratio, even when the flow rate of water is small, it is possible to exhibit a large water intake capacity and a scavenging capacity.

また、本発明に係る河川取水設備は、前記塵芥除去スクリーンを複数備えていることを特徴としてもよい。前記塵芥除去スクリーンによって河川の水と共に流れる塵芥を除去する。この除去の対象となる塵芥は、塵芥除去スクリーンの穴部の大きさによって異なり、穴部を小さくすればするほど、除去の対象となる塵芥は多くなる。   Moreover, the river water intake equipment according to the present invention may include a plurality of the dust removal screens. The dust flowing together with the river water is removed by the dust removing screen. The dust to be removed varies depending on the size of the hole in the dust removing screen, and the smaller the hole, the more dust to be removed.

しかし、前記穴部を小さくしすぎると、塵芥によって穴部が目詰まりして水が通過しにくくなり、十分な取水量を得ることができないおそれがある。   However, if the hole is made too small, the hole is clogged by dust and it becomes difficult for water to pass through, and there is a possibility that a sufficient water intake cannot be obtained.

なお、前記穴部の形状は、円形、矩形等が例示できるが特に制限はなく、除去する塵芥に応じて、種々選択して用いることが望ましい。   In addition, although the shape of the said hole part can illustrate circular, a rectangle, etc., there is no restriction | limiting in particular, It is desirable to select and use variously according to the dust to remove.

また、本発明は、渓流等小規模な河川における河川取水設備に用いる塵芥除去スクリーンであって、複数の穴部が形成された板状であり、河川横断方向に開口された取水口の上端近傍に河川の水面と略平行に取り付けられることを特徴としてもよい。   Further, the present invention is a dust removal screen for use in a river intake facility in a small river such as a mountain stream, and is a plate shape in which a plurality of holes are formed, in the vicinity of the upper end of the intake opening opened in the river transverse direction It may be characterized by being attached substantially parallel to the water surface of the river.

前記塵芥除去スクリーンによれば、河川の水と共に流れる塵芥を除去し、塵芥を除去した水を取水口から導水することができる。また、除去した塵芥、すなわち塵芥除去スクリーンによって取り除いた塵芥は、塵芥除去スクリーンの上に留まり、下流へ自然流下されるため、塵芥の除去作業を低減することができる。   According to the dust removal screen, dust flowing together with river water can be removed, and the water from which dust has been removed can be introduced from the water inlet. Further, the removed dust, that is, the dust removed by the dust removal screen stays on the dust removal screen and is naturally flowed downstream, so that the dust removal work can be reduced.

以上のように本発明に係る河川取水設備によれば、渓流等小規模な河川取水設備において、水を導水する取水口に流入する塵芥を減らすとともに、除去した塵芥の処理作業を縮減することが可能となる。   As described above, according to the river intake facility according to the present invention, in a small-scale river intake facility such as a mountain stream, it is possible to reduce the dust flowing into the intake port for introducing water and reduce the processing work of the removed dust. It becomes possible.

以下、本発明の実施形態について図面を参照して詳細に説明する。図１は、本実施の形態に係る河川取水設備の平面図であり、図２は、図１のＡ−Ａ断面図である。図示する矢印は、水の流れ方向である。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of a river intake facility according to the present embodiment, and FIG. 2 is a cross-sectional view taken along line AA in FIG. The arrow shown is the direction of water flow.

この河川取水設備１０は渓流に設けられており、本川導水路に導水する水を取水する設備である。河川取水設備１０は、河川の横断方向に開口された開口部２ａを有する取水口２と、前記開口部２ａの上端面に水面Ｌと略平行に配置された塵芥除去スクリーン１と、を備えている。   This river water intake facility 10 is provided in a mountain stream and is a facility for taking water to be introduced into the main river waterway. The river intake facility 10 includes a water intake 2 having an opening 2a opened in the transverse direction of the river, and a dust removal screen 1 disposed substantially parallel to the water surface L at the upper end surface of the opening 2a. Yes.

前記取水口２の開口部２ａは、渓流を流れる水を導入する入口となる。取水口２は、制水門を備えており、この制水門を開閉することにより、本川導水路に導入する水の量を調整することができる。   The opening 2a of the water intake 2 serves as an inlet for introducing water flowing through a mountain stream. The intake port 2 includes a water control gate, and the amount of water introduced into the main river conduit can be adjusted by opening and closing the water control gate.

塵芥除去スクリーン１は、渓流の水面Ｌと略平行に配置されている。その高さは、前記取水口２の開口部２ａの上端面であり、渓流の水面Ｌの下方である。塵芥除去スクリーン１は、表面に複数の穴部１ａを備えた鋼板である。前記穴部１ａは、開口率は約５％である。   The dust removal screen 1 is disposed substantially parallel to the water surface L of the mountain stream. The height is the upper end surface of the opening 2a of the water intake 2, and is below the water surface L of the mountain stream. The dust removal screen 1 is a steel plate having a plurality of holes 1a on the surface. The hole 1a has an opening ratio of about 5%.

塵芥除去スクリーン１の下部には、塵芥除去スクリーン１を支持する支持鋼管３が設けられている。支持鋼管３の下部は、渓流の川底に敷設されたコンクリート４に埋設されており、上部は、塵芥除去スクリーン１と溶接されている。この支持鋼管３によって塵芥除去スクリーン１を固定支持している。   A support steel pipe 3 that supports the dust removal screen 1 is provided below the dust removal screen 1. The lower part of the supporting steel pipe 3 is buried in concrete 4 laid on the bottom of the mountain stream, and the upper part is welded to the dust removal screen 1. The dust removal screen 1 is fixedly supported by the support steel pipe 3.

前記塵芥除去スクリーン１の周辺には、砕石５が配設されており、砕石５の上部には、コンクリート４が敷設され、上部に水が流下するように構成されている。前記砕石５を設けることにより、塵芥除去スクリーンの周囲の根止めと浮き上がり防止、また塵芥除去スクリーン周辺からの土砂の進入防止効果を得ることができる。   A crushed stone 5 is disposed around the dust removal screen 1, and concrete 4 is laid on the upper part of the crushed stone 5 so that water flows down on the upper part. By providing the crushed stone 5, it is possible to obtain the effect of preventing the surroundings of the dust removing screen and the lifting of the dust removing screen and preventing the entry of earth and sand from the periphery of the dust removing screen.

本発明に係る河川取水設備は、取水口２の開口部２ａの上面に塵芥除去スクリーン１が配置されているため、取水口２から導水する水は塵芥除去スクリーン１の穴部１ａを通過した水となる。前記塵芥除去スクリーン１の穴部１ａより大きな径の塵芥は、前記穴部１ａを通過しないため、塵芥除去スクリーン１上に留まる。そして、掃流機能により河川内を流下する水と共に下流方向に流れる。   In the river intake facility according to the present invention, since the dust removal screen 1 is disposed on the upper surface of the opening 2a of the intake port 2, water introduced from the intake port 2 passes through the hole 1a of the dust removal screen 1. It becomes. The dust having a diameter larger than the hole 1a of the dust removal screen 1 does not pass through the hole 1a, and therefore remains on the dust removal screen 1. And it flows in the downstream direction with the water flowing down in the river by the sweep function.

また、落ち葉等、水の通過に伴う吸着力の影響を受ける塵芥は、前記穴部１ａに付着するが、出水により河川流量が増加した際に水流によって浮き上がり、自然流下させることができる。従って、取水口２の内部に塵芥が混入したり、取水口２の前面に塵芥が堆積することを少なくすることができる。   Moreover, although dust leaves such as fallen leaves that are affected by the adsorption force associated with the passage of water adhere to the hole 1a, they can float and flow naturally when the river flow rate increases due to flooding. Therefore, it is possible to reduce the amount of dust mixed in the water intake 2 or the accumulation of dust on the front surface of the water intake 2.

なお、前記塵芥除去スクリーン１は、一定の径の穴部１ａが形成されているため、穴部１ａの径より小さな塵芥は穴部１ａを通過し、塵芥除去スクリーン１の下方に堆積する。従って、必要に応じて定期的に堆積した土砂等の塵芥を除去することが望ましい。   Since the dust removing screen 1 has a hole 1 a having a constant diameter, dust smaller than the diameter of the hole 1 a passes through the hole 1 a and accumulates below the dust removing screen 1. Therefore, it is desirable to remove dust such as earth and sand periodically deposited as necessary.

＜実験例＞
本発明に係る河川取水設備の取水力及び掃流力を検証するための実験を行った。 <Experimental example>
An experiment was conducted to verify the water intake force and the scavenging force of the river intake facility according to the present invention.

＜実験方法＞
縦１．００ｍ×横１．３３ｍの塵芥除去スクリーンを用いて、塵芥としての落ち葉を水とともに流して、取水力と掃流力を検証した。
実験に用いた塵芥除去スクリーンは、図３（ａ）〜（ｃ）に示す３つ開口パターンを用いて、それぞれの開口パターンにおいて３つの開口率（約４．５％、約８．２％、約１８．７％）のものを用いた。
図３（ａ）〜（ｃ）は、開口パターンを示したものであり、図示する斜線部が穴部を形成した開口部分である。（ａ）は全面に開口部分を設け、（ｂ）は縦格子状に開口部分を設け、（ｃ）は、下流部にのみ開口部分を設けている。 <Experiment method>
Using a dust removal screen measuring 1.00 m in length and 1.33 m in width, the fallen leaves as dust were flushed with water to verify the water intake force and the scavenging force.
The dust removal screen used in the experiment uses the three opening patterns shown in FIGS. 3A to 3C, and each opening pattern has three opening ratios (about 4.5%, about 8.2%, About 18.7%).
3A to 3C show an opening pattern, and the hatched portion shown in the figure is an opening portion in which a hole portion is formed. (A) provides an opening part on the entire surface, (b) provides an opening part in a vertical lattice shape, and (c) provides an opening part only in the downstream part.

＜結果＞
いずれの開口パターンにおいても、開口率４．５％の塵芥除去スクリーンでは、少ない流量で高い取水力及び掃流力が得られることがわかった。一方、開口率が１８．７％の塵芥除去スクリーンでは、通過する水による吸着力が高くなり、上流側での塵芥の付着が顕著となった。従って、下流側に水切れが生じ、十分な取水量を得ることができなかった。 <Result>
In any of the opening patterns, it was found that a dust removal screen having an opening ratio of 4.5% can obtain high intake force and scavenging force with a small flow rate. On the other hand, in the dust removal screen having an aperture ratio of 18.7%, the adsorbing power due to the passing water is high, and the dust adheres on the upstream side. Therefore, water runs out on the downstream side, and a sufficient amount of water intake cannot be obtained.

以上の実験結果を踏まえて種々検討した結果、本発明に係る河川取水設備の塵芥除去スクリーンの開口率は０％より大きく２６％以下が好ましく、より好ましくは４〜９％、最も好ましくは４．５〜５．０％である。前記開口率の塵芥除去スクリーンを用いることにより、少ない流量で、高い取水力及び掃流力を得られることがわかった。   As a result of various examinations based on the above experimental results, the opening ratio of the dust removal screen of the river intake facility according to the present invention is preferably greater than 0% and not greater than 26%, more preferably 4 to 9%, and most preferably 4. 5 to 5.0%. It was found that by using the dust removal screen having the above-mentioned aperture ratio, high water intake force and scavenging force can be obtained with a small flow rate.

さらに前記実験結果から、開口率が大きい場合、河川流量に占める取水量の割合が大き
すぎると高い掃流効果を得ることができないことがわかった。開口率１８．７％の塵芥除去スクリーンを用いた実験結果より、河川流量の６０％以上を掃流流量とすること、すなわち取水量を４０％以下とすることが好適であることがわかった。 Furthermore, from the above experimental results, it was found that when the aperture ratio is large, a high scavenging effect cannot be obtained if the ratio of water intake to the river flow rate is too large. From the results of experiments using a dust removal screen with an aperture ratio of 18.7%, it was found that 60% or more of the river flow rate should be the sweep flow rate, that is, the water intake amount should be 40% or less.

また、前記実験結果を踏まえて、３ｍの河川取水設備における河川流量と限界取水量との関係を算出した。その結果を図４に示す。図示する点線は、水のみを対象としており、実線は、落ち葉を混入させた水を対象としている。このグラフによれば、河川流量から導水できる水の流量を得ることができる。   In addition, based on the experimental results, the relationship between the river flow rate and the limit water intake in a 3 m river intake facility was calculated. The result is shown in FIG. The dotted line in the figure is intended only for water, and the solid line is intended for water mixed with fallen leaves. According to this graph, the flow rate of water that can be introduced from the river flow rate can be obtained.

実施の形態に係る河川取水設備の平面図である。It is a top view of the river intake equipment which concerns on embodiment. 図１のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 実験例の塵芥除去スクリーンの開口パターンを示した図である。It is the figure which showed the opening pattern of the dust removal screen of an experiment example. ３ｍの河川取水設備における河川流量と限界取水量との関係を示したグラフである。It is the graph which showed the relationship between the river flow rate and the limit water intake in 3m river intake equipment. 従来の水質浄化装置の断面図である。It is sectional drawing of the conventional water purification apparatus.

符号の説明Explanation of symbols

１ 塵芥除去スクリーン
１ａ 穴部
２ 取水口
２ａ 開口部
３ 支持鋼管
４ コンクリート
５ 砕石
１０ 河川取水設備
１０１ コンクリートダム
１０２ 側板
１０３ 天板
１０４ 底板
１０５ 透水性筒体
１０６ 活性炭
１０７ 石 DESCRIPTION OF SYMBOLS 1 Dust removal screen 1a Hole part 2 Water intake 2a Opening 3 Support steel pipe 4 Concrete 5 Crushed stone 10 River water intake equipment 101 Concrete dam 102 Side plate 103 Top plate 104 Bottom plate 105 Permeable cylinder 106 Activated carbon 107 Stone

Claims (4)

渓流等小規模な河川における河川取水設備であって、
河川を流れる水を導水する取水口と、前記取水口の上端近傍において河川の水面と略平行に配置された塵芥除去スクリーンと、を備え、
前記塵芥除去スクリーンは、複数の穴部が形成されており、
前記取水口は、前記塵芥除去スクリーンの穴部から下方に通過した水を導水することを特徴とする河川取水設備。 River intake equipment for small rivers such as mountain streams,
A water intake for guiding the water flowing through the river, and a dust removal screen disposed substantially parallel to the water surface of the river in the vicinity of the upper end of the water intake,
The dust removing screen has a plurality of holes,
The river intake system, wherein the intake port guides water that has passed downward from a hole portion of the dust removal screen. 前記塵芥除去スクリーンの穴部の開口率は、０％より大きく２６％以下であることを特徴とする請求項１に記載の河川取水設備。   2. The river intake system according to claim 1, wherein an opening ratio of the hole portion of the dust removal screen is greater than 0% and equal to or less than 26%. 前記塵芥除去スクリーンを複数備えていることを特徴とする請求項１又は２に記載の河川取水設備。   The river intake facility according to claim 1, wherein a plurality of the dust removal screens are provided. 渓流等小規模な河川における河川取水設備に用いる塵芥除去スクリーンであって、
複数の穴部が形成された板状であり、河川を流れる水を導水する取水口の上端近傍に河川の水面と略平行に取り付けられることを特徴とする塵芥除去スクリーン。 A dust removal screen used for river intake equipment in small rivers such as mountain streams,
A dust-removing screen having a plate-like shape in which a plurality of holes are formed, and being attached in the vicinity of the upper end of a water intake for guiding water flowing through the river, substantially parallel to the water surface of the river.
JP2005097172A 2005-03-30 2005-03-30 River water intake facility and dust removing screen used for this Pending JP2006274706A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021095697A (en) * 2019-12-16 2021-06-24 株式会社アドバンス Water-intake gate installed in river, cleaning device used for water-intake gate, hydraulic turbine power generation facility, and cleaning method of water-intake gate installed in river

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5689612A (en) * 1979-12-18 1981-07-21 Suekichi Hayakawa Separating method of dust at river water intake port
JPS63114715A (en) * 1986-10-30 1988-05-19 Yamasan:Kk Dust-removing and filtering intake device for surface flowing water in river
JPH0355309A (en) * 1989-07-21 1991-03-11 Tohoku Electric Power Co Inc River bed-buried type intake channel device
JP2002021045A (en) * 2000-07-05 2002-01-23 Shibata Ind Co Ltd Grid lid for water channel opening and manufacturing method therefor
JP2002173957A (en) * 2000-12-06 2002-06-21 Toyo Screen Kogyo Kk Rover surface water intake structure with inclined intake screen installed in groundsill
JP2003001020A (en) * 2001-06-22 2003-01-07 Mitsubishi Kakoki Kaisha Ltd Rotary dust remover
JP2004183292A (en) * 2002-12-02 2004-07-02 Maeda Setsubi Kogyo Kk Water intake device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5689612A (en) * 1979-12-18 1981-07-21 Suekichi Hayakawa Separating method of dust at river water intake port
JPS63114715A (en) * 1986-10-30 1988-05-19 Yamasan:Kk Dust-removing and filtering intake device for surface flowing water in river
JPH0355309A (en) * 1989-07-21 1991-03-11 Tohoku Electric Power Co Inc River bed-buried type intake channel device
JP2002021045A (en) * 2000-07-05 2002-01-23 Shibata Ind Co Ltd Grid lid for water channel opening and manufacturing method therefor
JP2002173957A (en) * 2000-12-06 2002-06-21 Toyo Screen Kogyo Kk Rover surface water intake structure with inclined intake screen installed in groundsill
JP2003001020A (en) * 2001-06-22 2003-01-07 Mitsubishi Kakoki Kaisha Ltd Rotary dust remover
JP2004183292A (en) * 2002-12-02 2004-07-02 Maeda Setsubi Kogyo Kk Water intake device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021095697A (en) * 2019-12-16 2021-06-24 株式会社アドバンス Water-intake gate installed in river, cleaning device used for water-intake gate, hydraulic turbine power generation facility, and cleaning method of water-intake gate installed in river

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