JP6731177B2 - Water discharge equipment - Google Patents

Water discharge equipment Download PDF

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JP6731177B2
JP6731177B2 JP2016017433A JP2016017433A JP6731177B2 JP 6731177 B2 JP6731177 B2 JP 6731177B2 JP 2016017433 A JP2016017433 A JP 2016017433A JP 2016017433 A JP2016017433 A JP 2016017433A JP 6731177 B2 JP6731177 B2 JP 6731177B2
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water
discharge
intake
bank
reservoir
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順哉 和泉
順哉 和泉
英治 登
英治 登
武志 佐藤
武志 佐藤
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Chugoku Electric Power Co Inc
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Description

本発明は、ダムや堤防等の堤体に設けられ、該堤体よりも下流側に所定量放流することができる放水設備に関する。 The present invention relates to a water discharge facility provided on a dam body such as a dam or an embankment and capable of discharging a predetermined amount downstream from the dam body.

従来から、貯水や利水名との貯めに堰（堤体）を備えたダムが建設されている。このダムは、下流側へ水を安定供給するために、常に所定量放流することができる放流設備が設けられる。この放流設備として、特許文献１の堰が知られている。 Conventionally, dams have been constructed with dams (banks) for storing water and storing water. In order to stably supply water to the downstream side, this dam is provided with a discharge facility that can always discharge a predetermined amount. The weir of Patent Document 1 is known as this discharge facility.

この放流設備を備えた堰１００は、例えば、図７（ａ）〜（ｃ）に示すように、堤体１００ａによって堰き止められた貯水部Ｗに配置される一対のフロート１０１と、該フロート１０１に連結され且つ取水口１０３を有する筒状の取水体１０２と、堰１００の放水口１０５に繋がり、取水体１０２を上下方向に案内する筒状の接続管路１０４とを備える（例えば、特許文献１参照）。 The weir 100 provided with this discharge facility is, for example, as shown in FIGS. 7A to 7C, a pair of floats 101 arranged in the water reservoir W blocked by the bank 100a, and the float 101. A cylindrical water intake body 102 that is connected to the water intake port 103 and has a water intake port 103, and a cylindrical connection pipe line 104 that is connected to the water discharge port 105 of the weir 100 and guides the water intake body 102 in the vertical direction (for example, Patent Document 1). 1).

かかる構成の堰によれば、流路の水位の変動によってフロート１０１の位置が上下することになり、取水体１０２の位置も同じ距離だけ上下する。したがって、水面に対する取水口１０３の相対的位置の変動がなく、一定量の放水が水位の変動に関係なく維持される。 With the weir having such a configuration, the position of the float 101 moves up and down due to the fluctuation of the water level in the flow path, and the position of the water intake body 102 also moves up and down by the same distance. Therefore, there is no change in the relative position of the water intake 103 with respect to the water surface, and a fixed amount of water is maintained regardless of the change in the water level.

特許登録第２７８５７２１号公報Patent Registration No. 2785721

ところで、前記堰１００は、取水体１０２の取水口１０３に塵芥が付着すると、取水量が減ってしまうから放流量を維持できなくなるという問題がある。また、この付着した塵芥は、人による除去作業によって除去しなければならないという問題もある。 By the way, in the weir 100, if dust is attached to the water intake 103 of the water intake body 102, there is a problem that the discharge amount cannot be maintained because the amount of water intake decreases. Further, there is also a problem that the attached dust must be removed by a removing operation by a person.

そこで、本発明は、上記問題に鑑み、取水口に塵芥が付着した場合でも、放流量を維持することができ、しかも、付着した塵芥を容易に除去することができる放水設備を提供することを目的とする。 Therefore, in view of the above problems, the present invention provides a water discharge facility that can maintain the discharge rate even when dust is attached to the intake port, and that can easily remove the attached dust. To aim.

本発明に係る放水設備は、堤体に設けられ、堤体によって堰き止められた水の一部を貯水する貯水部と、該貯水部に貯水された水を堤体より下流側へ放流する放流路と、を備え、貯水部は、貯水量が貯水可能量を超えた場合に、貯水が堤体から越流するように構成され、放流路は、貯水部の水を取り込むための取水口と、取り込んだ水を堤体の下流側へ放流する放水口と、放水口を開閉可能に構成された蓋と、を備え、蓋は、取水口より取り込んだ水の水圧が所定圧より高い場合には、放水口を開放し、所定圧より低い場合には、放水口を閉塞するよう構成されていることを特徴とする。 A water discharge facility according to the present invention is provided on a dam body, and a water storage part for storing a part of water dammed by the dam body, and a water discharge for discharging the water stored in the water storage part to a downstream side from the dam body. The water reservoir is configured so that the water overflows from the levee body when the amount of stored water exceeds the water storage capacity, and the discharge channel serves as an intake port for taking in water of the water storage unit. , Equipped with a water outlet for discharging the taken water to the downstream side of the bank, and a lid configured to open and close the water outlet, and the lid is provided when the water pressure taken from the water inlet is higher than a predetermined pressure. Is configured to open the water outlet and close the water outlet when the pressure is lower than a predetermined pressure.

かかる構成によれば、放流路の放水口を開閉する蓋は、取水口より取り込んだ水の水圧が所定圧より高い場合には、放水口を開放する。したがって、取水口に塵芥が付着していない状態では、取水量が確保されるため、蓋にかかる水圧も所定以上になり、放水口が開放されて放流量が維持される。一方、取水口より取り込んだ水の水圧が所定圧より低い場合には、放水口を蓋が閉塞する。したがって、取水口に塵芥が付着して取水量が減少すると、蓋にかかる水圧が低下して蓋が放水口を閉じてしまう。そうすると、放水口から放流されなくなるため、貯水部に溜まる水が増加する。そして、貯水部において、貯水可能量を超えると、貯水部内の水が堤体を超えて下流側へ放流され（越流が起きる）、放流量が維持される。 According to this structure, the lid that opens and closes the water outlet of the discharge passage opens the water outlet when the water pressure of the water taken in from the water inlet is higher than a predetermined pressure. Therefore, in a state in which dust is not attached to the water intake port, the amount of water intake is secured, so that the water pressure applied to the lid becomes more than a predetermined value, and the water discharge port is opened to maintain the discharge amount. On the other hand, when the water pressure of the water taken in from the water intake port is lower than the predetermined pressure, the lid closes the water discharge port. Therefore, if dust is attached to the water intake and the amount of water intake decreases, the water pressure applied to the lid decreases and the lid closes the water outlet. Then, the water will not be discharged from the outlet, and the amount of water accumulated in the water storage will increase. When the amount of water that can be stored exceeds the amount that can be stored in the water storage unit, the water in the water storage unit is discharged to the downstream side beyond the bank body (overflow occurs), and the discharge amount is maintained.

ここで、越流が起こると、放流路を介した放流による水の流れとは異なる水の流れが貯水部に生じることになる。取水口に付着している塵芥は、放流路を介した放流による水の流れで取水口に付着した物である。よって、貯水部内の水の流れが放流路を介した放流による水の流れから越流による水の流れに変わることによって、塵芥は越流による水の流れにのって取水口から除去される。そうすると、取水口からの取水量は回復して増加するため、蓋にかかる水圧も回復して増加する。そうすると、蓋は放水口を開放するから放流路からの放流が再開される。 Here, when the overflow occurs, a water flow different from the water flow due to the discharge through the discharge channel occurs in the water storage section. The dust attached to the intake port is a substance attached to the intake port due to the flow of water discharged through the discharge channel. Therefore, when the flow of water in the water storage section changes from the flow of water discharged through the discharge channel to the flow of water overflowed, dust is removed from the intake port along the flow of water overflowed. Then, since the amount of water taken from the water intake is restored and increased, the water pressure applied to the lid is also restored and increased. Then, since the lid opens the water discharge port, the discharge from the discharge channel is restarted.

本発明の一態様として、貯水部は、下流側隔壁と、上流側隔壁とを備え、貯水が下流側隔壁から越流するように構成され、上流側隔壁には、その下端部に堤体の上流側の水を貯水部内へ引き込むための流入口が設けられることが好ましい。 As one aspect of the present invention, the water storage unit includes a downstream side partition wall and an upstream side partition wall, and is configured so that the stored water overflows from the downstream side partition wall. It is preferable to provide an inlet for drawing the water on the upstream side into the water storage section.

かかる構成によれば、越流が起きている場合の貯水部内の水の流れは、上流側隔壁の下側の流入口から下流側隔壁の上側へ向けた斜め上方の流れとなる。よって、取水口に付着した塵芥を容易に除去することができる。 According to this configuration, the flow of water in the water storage section when overflow occurs is an obliquely upward flow from the lower inlet of the upstream partition to the upper side of the downstream partition. Therefore, the dust attached to the water intake can be easily removed.

本発明の他態様として、前記取水口は、貯水部の内面よりも内部側へ離間して配置されることが好ましい。 As another aspect of the present invention, it is preferable that the water intake port is arranged so as to be separated from the inner surface of the water storage portion toward the inner side.

かかる構成によれば、取水口は、貯水部の内面よりも内部側へ離間して配置されるから、前記斜め上方への流れに晒される。よって効果的に塵芥を除去できる。 According to this structure, since the water intake is arranged to be spaced apart from the inner surface of the water storage portion toward the inner side, the water intake is exposed to the obliquely upward flow. Therefore, dust can be effectively removed.

本発明の他態様として、前記放流路は、取水口を有して貯水部内に昇降可能に構成された取水体と、貯水部の貯水量に応じて取水体を昇降させるフロートとを備え、上流側隔壁には、その上端部にフロートがそれ以上上昇しないように、該フロートの上昇を規制するプレートが取り付けられていることが好ましい。 As another aspect of the present invention, the discharge passage includes an intake body configured to have a water intake port and configured to be movable up and down in a water storage unit, and a float configured to move the water intake body up and down according to an amount of water stored in the water storage unit. It is preferable that a plate that restricts the rise of the float is attached to the upper end of the side partition so that the float does not rise further.

かかる構成によれば、プレートによって、フロートの上昇が規制されることによって、取水口を貯水部内の所定の高さに位置させることができる。よって、越流時の貯水部内での斜め上方への水流によって効果的に付着した塵芥を除去することができる。 With this configuration, the plate restricts the rise of the float, so that the intake port can be positioned at a predetermined height in the water storage section. Therefore, it is possible to effectively remove the dust that has adhered due to the obliquely upward water flow in the water storage section during the overflow.

以上のように、本発明によれば、取水口に塵芥が付着した場合でも、放流量を維持することができ、しかも、付着した塵芥を容易に除去することができる、という優れた効果を奏する。 As described above, according to the present invention, even when dust is attached to the intake port, the discharge amount can be maintained, and further, the attached dust can be easily removed, which is an excellent effect. ..

図１は、本発明の一実施形態に係る放水設備を示す図である。FIG. 1 is a diagram showing a water discharge facility according to an embodiment of the present invention. 図２（ａ），（ｂ）は、図１の放流路の放水口を開閉する蓋を示す図である。2(a) and 2(b) are views showing a lid for opening and closing the water outlet of the discharge passage of FIG. 図３は、取水口に塵芥が付着し、放流路の放水口が蓋で閉塞された状態を示す図である。FIG. 3 is a diagram showing a state in which dust is attached to the water intake port and the water discharge port of the discharge channel is closed by a lid. 図４は、放流路の放水口が蓋で閉塞され、取水口に付着した塵芥が除去された状態を示す図である。FIG. 4 is a diagram showing a state in which the water discharge port of the discharge channel is closed by a lid, and the dust attached to the water intake port is removed. 図５は、放水設備の使用態様を示す図であり、堤体で堰き止められた貯水部の水位が満水の状態を示す図である。FIG. 5: is a figure which shows the usage mode of a water discharge facility, and is a figure which shows the state which the water level of the water storage part blocked by the bank is full. 図６は、放水設備の使用態様を示す図であり、堤体で堰き止められた貯水部の水位が下がった状態を示す図である。FIG. 6 is a diagram showing a usage mode of the water discharge facility, and is a diagram showing a state in which the water level of the water storage section dammed by the bank is lowered. 図７（ａ）〜（ｃ）は、水路の下流側に一定流量の水を放水するための従来の堰を示す図である。7A to 7C are diagrams showing a conventional weir for discharging a constant flow rate of water to the downstream side of the water channel.

本発明の一実施形態に係る放水設備について図１〜図６を参照しながら説明する。 A water discharge facility according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6.

本実施形態に係る放水設備を説明する。該放水設備１は、例えば、図１〜図３に示すように、堤体２に設けられ、堤体２によって堰き止められた水の一部を貯水する貯水部３と、該貯水部３に貯水された水を堤体２より下流側へ放流する放流路４とを備える。 The water discharge facility according to this embodiment will be described. As shown in FIGS. 1 to 3, for example, the water discharge facility 1 is provided in a dam body 2, and a water storage unit 3 for storing a part of water dammed by the dam body 2 and a water storage unit 3. The discharge channel 4 discharges the stored water to the downstream side from the bank 2.

貯水部３は、貯水量が貯水可能量を超えた場合に、貯水された水が堤体２から越流するように構成される。具体的には、貯水部３は、貯水された水が、後述する堤体２の下流側隔壁２０から越流するように構成される。 The water storage unit 3 is configured so that the stored water overflows from the bank 2 when the water storage amount exceeds the water storage capacity. Specifically, the water storage unit 3 is configured so that the stored water overflows from the downstream partition wall 20 of the bank 2 described later.

貯水部３は、堤体２の上部に凹部を形成して設けられる。具体的には、水の流れる方向に対して直交方向に設置された堤体２の下流側隔壁２０と、該下流側隔壁２０の両端部から上流側に向かって延出される（水の流れる方向とは反対方向に向かって延出される）堤体２の一対の側壁２１，２１と、下流側隔壁２０と一対の側壁２１，２１とで画定される底面の開口を閉塞する堤体２の底壁２２と、下流側隔壁２０と一対の側壁２１，２１と底壁２２とで画定される上流側の開口の上側部を閉塞する堤体２の上流側隔壁２３と、を備える。 The water storage part 3 is provided by forming a recess in the upper part of the bank 2. Specifically, the downstream partition wall 20 of the bank 2 installed in a direction orthogonal to the water flow direction, and extending from both ends of the downstream partition wall 20 toward the upstream side (water flow direction (Extending in a direction opposite to) The bottom of the dam body 2 that closes the bottom opening defined by the pair of side walls 21 and 21 of the dam body 2 and the downstream partition wall 20 and the pair of side walls 21 and 21. The wall 22 and the downstream partition wall 20, the upstream partition wall 23 of the bank 2, which closes the upper portion of the upstream opening defined by the pair of side walls 21, 21 and the bottom wall 22.

上流側隔壁２３の下端部には、堤体２の上流側の水を貯水部３内へ引き込むための流入口２４が設けられる。具体的には、流入口２４は、上流側隔壁２３の下端部と底壁２２の上流側の端部との間に形成される。また、流入口２４には、塵芥Ｘの流入を防止するネット２５が取り付けられる。 At the lower end of the upstream partition wall 23, an inflow port 24 for drawing water on the upstream side of the bank 2 into the water storage section 3 is provided. Specifically, the inflow port 24 is formed between the lower end of the upstream partition 23 and the upstream end of the bottom wall 22. Further, a net 25 that prevents the inflow of dust X is attached to the inflow port 24.

また、上流側隔壁２３の上端部には、後述する放流路４のフロート４１がそれ以上上昇しないように、該フロート４１の上昇を規制するプレート２６が取り付けられている。 A plate 26 is attached to the upper end of the upstream partition 23 so as to prevent the float 41 of the discharge passage 4, which will be described later, from further rising.

プレート２６は、フロート４１が出退可能な大きさの貫通孔２６０が形成される。また、プレート２６の上流側端部２６ａは、上流側隔壁２３の上端部の端面に取り付けられる。また、プレート２６の下流側端部２６ｂは、一旦、垂直方向（上側）に折り曲げられた後、先端部側が水平方向に折り曲げられる。その結果、該先端部の下面と下流側隔壁２０の上端部の端面との間に隙間（越流口）Ｈが形成される。この隙間Ｈは、後述する放流本管４２１の放水口４２２ａが蓋４３で閉塞された状態において、取水口４０１に取り付けられたスクリーン４０２に付着した塵芥Ｘを下流側に放流させるためのものである。 The plate 26 has a through hole 260 having a size that allows the float 41 to move in and out. The upstream end 26 a of the plate 26 is attached to the end surface of the upper end of the upstream partition 23. Further, the downstream end portion 26b of the plate 26 is once bent in the vertical direction (upper side), and then the tip end side is bent in the horizontal direction. As a result, a gap (overflow port) H is formed between the lower surface of the tip portion and the end surface of the upper end portion of the downstream partition wall 20. The gap H is for discharging the dust X attached to the screen 402 attached to the water intake 401 to the downstream side in a state where the water discharge port 422a of the main discharge pipe 421 described later is closed by the lid 43. ..

放流路４は、貯水部３内に昇降可能に構成された取水体４０と、貯水部３の貯水量に応じて取水体４０を昇降させるフロート４１と、貯水部３の水を下流側に放流するための放水口４２１ａを有する放流管路４２と、前記放水口４２１ａを開閉可能に構成された蓋４３と、を備える。 The discharge channel 4 includes an intake body 40 configured to be movable up and down in the water storage unit 3, a float 41 that moves the intake body 40 up and down according to the amount of water stored in the water storage unit 3, and the water in the water storage unit 3 is discharged downstream. A discharge pipe 42 having a water discharge port 421a for controlling the water discharge is provided, and a lid 43 configured to open and close the water discharge port 421a.

取水体４０は、筒状で、後述する放流管路４２の接続管４２０に対して上下動可能に内挿される。また、取水体４０は、フロート４１の下端に接続される接続部４００と、該接続部４００から所定の距離をおいて設けられた取水口４０１と、該取水口４０１に配置され、取水口４０１を通って取水体４０の内部への塵芥Ｘの流入を防止するためのスクリーン４０２と、取水体４０の上下動における下限位置を規制する第一規制体４０３と、取水体４０の上下動における上限位置を規制する第二規制体４０４と、を備える。 The water intake body 40 has a tubular shape and is vertically movably inserted into a connection pipe 420 of a discharge pipe line 42 described later. Further, the water intake body 40 is arranged at the connection part 400 connected to the lower end of the float 41, the water intake port 401 provided at a predetermined distance from the connection part 400, and the water intake port 401, and the water intake port 401. Screen 402 for preventing the inflow of dust X into the inside of the water intake body 40, the first restricting body 403 for controlling the lower limit position in the vertical movement of the water intake body 40, and the upper limit in the vertical movement of the water intake body 40. A second regulation body 404 that regulates the position.

取水口４０１は、貯水部３の内面よりも内部側へ離間して配置される。具体的には、フロート４１、取水体４０、放流管路４２等は、下流側隔壁２０と上流側隔壁２３との間に配置される。 The water intake 401 is arranged to be spaced apart from the inner surface of the water storage section 3 toward the inner side. Specifically, the float 41, the water intake body 40, the discharge conduit 42, etc. are arranged between the downstream partition wall 20 and the upstream partition wall 23.

フロート４１は、下流側隔壁２０と、一対の側壁２１，２１と、底壁２２と、上流側隔壁２３とで画定される貯水部３内に配置される。また、フロート４１は、半球形状で、環状のストッパ４１０が取り付けられる。このストッパ４１０は、プレート２６の貫通孔２６０の開口周縁部に当接し、フロート４１が貫通孔２６０から抜け出ることを防止する。 The float 41 is arranged in the water storage section 3 defined by the downstream partition wall 20, the pair of side walls 21 and 21, the bottom wall 22, and the upstream partition wall 23. Further, the float 41 has a hemispherical shape, and an annular stopper 410 is attached thereto. The stopper 410 contacts the peripheral edge of the opening of the through hole 260 of the plate 26 and prevents the float 41 from slipping out of the through hole 260.

放流管路４２は、鉛直方向に延び且つ取水体４０を上下方向に案内する筒状の接続管４２０と、該接続管４２０に一端部が接続され、他端部が放水口４２１ａを有する筒状の放流本管４２１と、を備える。 The discharge pipe line 42 has a cylindrical connection pipe 420 that extends in the vertical direction and guides the water intake body 40 in the vertical direction, and has a cylindrical shape in which one end is connected to the connection pipe 420 and the other end has a water discharge port 421a. And the main discharge pipe 421 of.

接続管４２０の上端開口部の周縁部には、取水体４０の第二規制体４０４に係止する環状の係止部４２０ａが形成される。 An annular locking portion 420 a that locks with the second restriction body 404 of the water intake body 40 is formed on the peripheral edge of the upper end opening of the connection pipe 420.

放流本管４２１は、一端部が垂直方向に延出されて接続管４２０に接続され、他端部が水平方向に延出され、貯水部３の水を下流側に放流するための放水口４２１ａが設けられている。 The discharge main pipe 421 has one end extending in the vertical direction and connected to the connecting pipe 420, and the other end extending in the horizontal direction, and has a water discharge port 421a for discharging the water in the water reservoir 3 to the downstream side. Is provided.

蓋４３は、放流本管４２１の放水口４２１ａに対して水圧で開くように構成されている。具体的には、取水口４０１より取り込んだ水の水圧が所定圧より高い場合は、放水口４２２ａを開放し、所定圧より低い場合は、放水口４２１ａを閉塞するよう構成されている。また、蓋４３は、本実施形態では、円板状で、放流本管４２１の放水口４２１ａの開口周縁部にはパッキンＰが装着され、蓋４３によって放水口４２１ａは密閉されるように構成される。 The lid 43 is configured to open by water pressure with respect to the water discharge port 421a of the discharge main pipe 421. Specifically, the water outlet 422a is opened when the water pressure taken from the water inlet 401 is higher than a predetermined pressure, and the water outlet 421a is closed when the water pressure is lower than the predetermined pressure. Further, in the present embodiment, the lid 43 is disc-shaped, and the packing P is attached to the opening peripheral portion of the water outlet 421a of the discharge main 421, and the water outlet 421a is sealed by the lid 43. It

つぎに本実施形態に係る放水設備の使用態様について説明する。まず、図１の状態は、上流側からの水が貯水部３に流入して満水の状態であり、フロート４１がプレート２６の貫通孔２６０から突出し、貯水部３の水が取水体４０、接続管４２０を通って放流本管４２１の放水口４２１ａから放水される。 Next, a usage mode of the water discharge facility according to the present embodiment will be described. First, in the state of FIG. 1, the water from the upstream side flows into the water storage section 3 and is full of water, the float 41 projects from the through hole 260 of the plate 26, and the water of the water storage section 3 is connected to the water intake body 40. Water is discharged from the water discharge port 421a of the discharge main pipe 421 through the pipe 420.

このとき、プレート２６の貫通孔２６０の周縁部には、フロート４１のストッパ４１０が当接するとともに、第二規制体４０４が接続管４２０の上端開口部の係止部４２０ａに係止する。また、取水体４０、接続管４２０、放流本管４２１を通った水の水圧によって蓋４３が押し開けられる。 At this time, the stopper 410 of the float 41 comes into contact with the peripheral portion of the through hole 260 of the plate 26, and the second restricting body 404 is locked by the locking portion 420a of the upper end opening of the connecting pipe 420. Further, the lid 43 is pushed open by the water pressure of the water passing through the water intake body 40, the connection pipe 420, and the discharge main pipe 421.

この状態から、貯水部３の水が減少すると、図４に示すように、貯水部３の水が取水体（接続管４２０）４０、放流本管４２１の放水口４２１ａから放水される。 From this state, when the water in the water storage unit 3 decreases, the water in the water storage unit 3 is discharged from the water intake body (connection pipe 420) 40 and the water discharge port 421a of the discharge main pipe 421, as shown in FIG.

このとき、プレート２６の貫通孔２６０からフロート４１が退避し、取水体４０の第一規制体４０３が接続管４２０の上端開口部の係止部４２０ａに当接し、接続管４２０及び放流本管４２１を通る水の水圧によって蓋４３が押し開けられる。 At this time, the float 41 withdraws from the through hole 260 of the plate 26, the first restriction body 403 of the water intake body 40 contacts the locking portion 420a of the upper end opening of the connection pipe 420, and the connection pipe 420 and the discharge main pipe 421. The lid 43 is pushed open by the water pressure of the water passing through.

すなわち、貯水部３の水位が変化しても、貯水部３の水面から取水口４０１の距離は一定であり、取水口４０１から一定流量の水（維持流量）が下流側に放水されることになる。 That is, even if the water level of the water storage unit 3 changes, the distance from the water surface of the water storage unit 3 to the intake port 401 is constant, and a constant flow rate of water (maintenance flow rate) is discharged to the downstream side from the intake port 401. Become.

つぎに、図５に示すように、取水口４０１に塵芥Ｘが付着（堆積）すると、取水口４０１より取り込んだ水の水圧が所定圧より低くなり、放水口４２１ａを蓋４３が閉塞する。そうすると、放水口４２１ａから放流されなくなるため、貯水部３に溜まる水が増加する。そして、貯水部３において、貯水可能量を超えると、貯水部３内の水が堤体２の下流側隔壁２０を超えて下流側へ放流され（越流が起きる）、放流量が維持される。 Next, as shown in FIG. 5, when the dust X adheres (accumulates) to the water intake 401, the water pressure of the water taken in from the water intake 401 becomes lower than a predetermined pressure, and the lid 43 closes the water discharge port 421a. Then, since the water is not discharged from the water discharge port 421a, the amount of water accumulated in the water storage section 3 increases. When the amount of water that can be stored in the water storage unit 3 is exceeded, the water in the water storage unit 3 is discharged downstream (overflow occurs) beyond the downstream partition wall 20 of the bank 2, and the discharge amount is maintained. ..

ここで、越流が起こると、放流路４を介した放流による水の流れとは異なる水の流れが貯水部３に生じることになる。すなわち、取水口４０１に付着している塵芥Ｘは、放流路４を介した放流による水の流れで取水口４０１に付着した物である。よって、貯水部３内の水の流れが放流路４を介した放流による水の流れから越流による水の流れに変わることによって、塵芥Ｘは越流による水の流れにのって取水口４０１から除去される。そうすると、取水口４０１からの取水量は回復して増加するため、蓋４３にかかる水圧も回復して増加する。そうすると、蓋４３は放水口４２１ａを開放するから放流路４からの放流が再開される。 Here, when the overflow occurs, a water flow different from the water flow due to the discharge through the discharge passage 4 is generated in the water storage section 3. That is, the dust X attached to the water intake 401 is a substance attached to the water intake 401 by the flow of water discharged through the discharge flow path 4. Therefore, the flow of water in the water storage unit 3 changes from the flow of water discharged through the discharge channel 4 to the flow of water overflowed, and the dust X follows the flow of water overflowed and the intake port 401. Removed from. Then, the amount of water taken from the water intake 401 recovers and increases, so that the water pressure applied to the lid 43 also recovers and increases. Then, the lid 43 opens the water discharge port 421a, so that the discharge from the discharge channel 4 is restarted.

具体的には、越流が起きている場合の貯水部３内の水の流れは、上流側隔壁２３の下側の流入口２４から下流側隔壁２０の上側へ向けた斜め上方の流れとなる。この斜め上方への流れを受ける位置に取水口４０１は配置されている。 Specifically, the flow of water in the water storage section 3 when overflow occurs is an obliquely upward flow from the lower inlet 24 of the upstream partition 23 to the upper side of the downstream partition 20. .. The water intake 401 is arranged at a position that receives the upward flow.

すなわち、取水口４０１は、貯水部３の内面よりも内部側へ離間して配置されるから、前記斜め上方への流れに晒される。よって取水口４０１に付着した塵芥Ｘを効果的に除去することができる。 That is, since the water intake 401 is arranged more distant inward than the inner surface of the water storage section 3, it is exposed to the above-mentioned obliquely upward flow. Therefore, the dust X adhering to the water intake 401 can be effectively removed.

このように、本実施形態に係る放水設備によれば、取水体４０の取水口４０１に付着した塵芥Ｘを容易に除去することができる。 As described above, according to the water discharge facility according to the present embodiment, the dust X attached to the water intake 401 of the water intake body 40 can be easily removed.

なお、本発明は、前記実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲で種々変更を加え得ることは勿論のことである。 The present invention is not limited to the above-mentioned embodiment, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

例えば、前記実施形態の場合、放流管路４２は、貯水部３の底壁２２から下方へ形成するようにしたが、これに限らず、下流側隔壁２０から下流側へ形成してもよいし、側壁２１から側方へ形成してもよい。 For example, in the above-described embodiment, the discharge pipe line 42 is formed downward from the bottom wall 22 of the water storage section 3, but the present invention is not limited to this, and it may be formed from the downstream partition wall 20 to the downstream side. It may be formed laterally from the side wall 21.

また、前記実施形態の場合、取水口４０１は貯水部３の内面から離間して配置された場合に限らず、貯水部３の内面（例えば、底壁２２の面、下流側隔壁２０の面、側壁２１の面）に設けてもよい。 Further, in the case of the above-described embodiment, the water intake 401 is not limited to the case where the water intake 401 is arranged apart from the inner surface of the water storage section 3, and the inner surface of the water storage section 3 (for example, the surface of the bottom wall 22, the surface of the downstream side partition wall 20, It may be provided on the side wall 21).

また、前記実施形態の場合、取水体４０は、昇降式にしたが、これに限らず、固定式でもよい。固定式の場合、フロート４１は不要である。 Further, in the above embodiment, the water intake body 40 is of the lifting type, but is not limited to this and may be of the fixed type. In the case of the fixed type, the float 41 is unnecessary.

また、前記実施形態の場合、放水口４２１ａを開閉する構成としては、蓋４３を自重によって開方向へ回動するように構成し、放水による所定圧以上の水圧で蓋４３を開方向へ回動保持する構成にしたが、これに限らず、蓋４３を自重によって閉方向へ回動するように構成し、該蓋４３を開の状態で保持する保持機構と、放水の水圧を検出する水圧センサと、検出した水圧が所定圧より低い場合に、保持機構の保持を解除する制御部とを備える構成とすることもできる。 Further, in the case of the above-described embodiment, as a configuration for opening and closing the water discharge port 421a, the lid 43 is configured to rotate in the opening direction by its own weight, and the lid 43 is rotated in the opening direction by a water pressure higher than a predetermined pressure due to water discharge. Although the configuration is such that the lid 43 is held, the lid 43 is configured to rotate in the closing direction by its own weight, and the holding mechanism that holds the lid 43 in the open state and the water pressure sensor that detects the water pressure of the water discharged. And a control unit that releases the holding of the holding mechanism when the detected water pressure is lower than a predetermined pressure.

また、前記実施形態の場合、放流本管４２１の蓋４３を水圧のみで開閉するようにしたが、蓋４３を閉塞する方向に付勢する弾性部材によって開閉するようにしてもよいし、スライド式であってもよい。 Further, in the above-described embodiment, the lid 43 of the discharge main pipe 421 is opened and closed only by water pressure, but it may be opened and closed by an elastic member that urges the lid 43 in a closing direction, or a slide type. May be

また、前記実施形態の場合、取水体４０は昇降可能に構成したが、上下の軸線周りに回転可能に構成することもできる。この場合、越流時の斜め上方への水流によって回転するから、効果的に除塵できる。 Further, in the above-described embodiment, the water intake body 40 is configured to be movable up and down, but it may be configured to be rotatable around the upper and lower axes. In this case, since the water is rotated obliquely upward when overflowing, dust can be effectively removed.

また、前記実施形態の場合、堤体２の流入口２４は、上流側隔壁２３の下側に設けたが、これに限らず、上端部や中間部に設けてもよい。また、中間部と下端部の二箇所に設けてもよい。 Further, in the above embodiment, the inflow port 24 of the bank 2 is provided on the lower side of the upstream partition wall 23, but it is not limited to this, and may be provided on the upper end portion or the intermediate portion. Further, it may be provided at two places, that is, the intermediate portion and the lower end portion.

また、前記実施形態の場合、貯水部３は、堤体２の上部に凹部を形成して設けたが、これに限らず、堤体２の上流側側面を利用して貯水部を設けてもよい。例えば、上流側側面から上流側に突設された一対の側壁と、該一対の側壁を連結する壁とで、貯水部を構成する。この場合、上部及び底部を開放し、底部開口を流入口とし、該流入口の近傍に取水口を配置し、流入口から上部開口への水流によって塵芥を除去するようにする。 In addition, in the above-described embodiment, the water storage section 3 is provided by forming a recess in the upper portion of the dam body 2, but the present invention is not limited to this. Good. For example, a pair of side walls protruding from the upstream side surface to the upstream side, and a wall connecting the pair of side walls constitute a water storage section. In this case, the top and bottom are opened, the bottom opening is used as an inflow port, an intake port is arranged in the vicinity of the inflow port, and dust is removed by a water flow from the inflow port to the upper opening.

また、前記実施形態の場合、ダムの堤体を例にとって説明したが、堤防の堤体であってもよい。 Further, in the above-described embodiment, the dam body is described as an example, but the dam body may be a dam body.

なお、前記実施形態において、「所定の水圧」とは、放流本管４２１の放水口４２１ａからの放流量が、予め定められた量であるときの放水口４２１ａの付近での水圧を言う。 In addition, in the said embodiment, "predetermined water pressure" means the water pressure in the vicinity of the water outlet 421a when the amount of discharge from the water outlet 421a of the main discharge pipe 421 is a predetermined amount.

１…放水設備、２…堤体、２０…下流側隔壁、２１…側壁、２２…底壁、２３…上流側隔壁、２４…流入口、２５…ネット、２６…プレート、２６０…貫通孔、３…貯水部、４…放流路、４０…取水体、４００…接続部、４０１…取水口、４０２…スクリーン、４０３…第一規制体、４０４…第二規制体、４１…フロート、４１０…ストッパ、４２…放流管路、４２０…接続管、４２０ａ…係止部、４２１…放流本管、４２１ａ…放水口、４３…蓋、Ｐ…パッキン、Ｈ…隙間、Ｘ…塵芥 DESCRIPTION OF SYMBOLS 1... Water discharge facility, 2... Embankment, 20... Downstream partition, 21... Sidewall, 22... Bottom wall, 23... Upstream partition, 24... Inflow port, 25... Net, 26... Plate, 260... Through hole, 3 ... water storage part, 4... discharge channel, 40... intake body, 400... connection part, 401... intake port, 402... screen, 403... first regulation body, 404... second regulation body, 41... float, 410... stopper, 42... Discharge pipe line, 420... Connection pipe, 420a... Locking part, 421... Discharge main pipe, 421a... Water discharge port, 43... Lid, P... Packing, H... Gap, X... Dust

Claims (3)

堤体に設けられ、堤体によって堰き止められた水の一部を貯水する貯水部と、該貯水部に貯水された水を堤体より下流側へ放流する放流路と、を備え、
貯水部は、貯水量が貯水可能量を超えた場合に、貯水が堤体から越流するように構成され、
放流路は、貯水部の水を取り込むための取水口と、取り込んだ水を堤体の下流側へ放流する放水口と、
放水口を開閉可能に構成された蓋と、を備え、
蓋は、取水口より取り込んだ水の水圧が所定圧より高い場合には、放水口を開放し、所定圧より低い場合には、放水口を閉塞するよう構成され、
貯水部は、下流側隔壁と、上流側隔壁とを備え、貯水が下流側隔壁から越流するように構成され、上流側隔壁には、その下端部に堤体の上流側の水を貯水部内へ引き込むための流入口が設けられることを特徴とする放水設備。 A reservoir provided on the bank, storing a part of the water dammed by the bank, and a discharge channel for discharging the water stored in the reservoir to the downstream side of the bank,
The reservoir is configured so that the reservoir overflows from the bank when the reservoir capacity exceeds the reservoir capacity.
The discharge channel is a water intake for taking in water from the reservoir, and a water discharge outlet for discharging the taken-in water to the downstream side of the bank.
A lid configured to open and close the water outlet,
The lid is configured to open the water outlet when the water pressure taken from the water inlet is higher than a predetermined pressure, and to close the water outlet when the water pressure is lower than the predetermined pressure ,
The water storage unit includes a downstream side partition wall and an upstream side partition wall, and is configured so that the stored water overflows from the downstream side partition wall. water discharge equipment inlet is characterized by Rukoto provided for pulling the. 前記取水口は、貯水部の内面よりも内部側へ離間して配置されることを特徴とする請求項１に記載の放水設備。 The water discharge facility according to claim 1 , wherein the water intake port is arranged so as to be spaced inward from an inner surface of the water storage section. 放流路は、取水口を有して貯水部内に昇降可能に構成された取水体と、貯水部の貯水量に応じて取水体を昇降させるフロートとを備え、
上流側隔壁には、その上端部にフロートがそれ以上上昇しないように、該フロートの上昇を規制するプレートが取り付けられていることを特徴とする請求項１又は２に記載の放水設備。 The discharge channel includes a water intake body having a water intake port and configured to be able to move up and down in the water storage unit, and a float that moves the water intake unit up and down according to the amount of water stored in the water storage unit,
The water discharge equipment according to claim 1 or 2 , wherein a plate that restricts the rise of the float is attached to the upper end of the upstream partition wall so that the float does not rise further.
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