JP2004360280A

JP2004360280A - Flushing gate

Info

Publication number: JP2004360280A
Application number: JP2003159289A
Authority: JP
Inventors: Masahisa Fukahori; 賢久深堀; Sunao Miyauchi; 直宮内; Minoru Sakuta; 実作田
Original assignee: Kubota Corp
Current assignee: Kubota Corp
Priority date: 2003-06-04
Filing date: 2003-06-04
Publication date: 2004-12-24

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flushing gate suitable for flushing cleaning for a river, a sewage discharge pipe, an irrigation canal, etc., which makes the flushing cleaning performed by making a valve element automatically and surely fall by means of a simple structure from which a hoist gear is omitted, which automatically and rapidly raises and returns the valve element after the flushing cleaning, and which can temporarily exert a water storage function. <P>SOLUTION: This flushing gate is equipped with: a rising-and-cut-off-state holding/releasing means 3 for allowing the tilting of the valve element 2 in a fall direction by holding a rising and cut-off state of the valve element 2 when a water level gradually rises to a flushing performing water level, and releasing the holding of the rising and cut-off state when the water level has risen up to the flushing performing water level; a rising-and-cut-off-state restoring means 4 for raising the fallen valve element 2; a rising-and-cut-off-state restraining means 11 for restraining the valve element 2 in the rising and cut-off state by interfering with the means 3, when the water level rapidly rises above the flushing performing water level; and a drainage passage 12 for lowering the water level, which releases the restraint of the rising and cut-off state of the valve element 2 by lowering the water level up to the flushing performing water level. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、河川、下水排管、用水路などのフラッシュ洗浄に好適なフラッシュゲートに関する。
【０００２】
【従来の技術】
従来より、河川、下水排管、用水路などを定期的にフラッシュ洗浄するフラッシュゲートが知られている（たとえば、特許文献１参照。）。
【０００３】
このフラッシュゲートは、図１２に示すように、基部５０が水路５１の底部に枢着された起立・転倒自在な堰板５２と、堤防上に設置された巻上装置５３とを備え、巻上装置５３によって起立止水状態に支持された堰板５２が、水路５１の水位の一定以上の上昇によって転倒させられてフラッシュ洗浄がなされるとともに、フラッシュ洗浄によって水路５１の水位が所定の起立水位まで低下したときは、巻上装置５３を起動して再度堰板５２を起立させるように構成されており、堰板５２に水路５１の水が流入する水タンク５４を設け、この水タンク５４には、水タンク５４の横断面積と同等以上の面積を有する上向きの開口５６を形成し、堰板５２が転倒したときに水タンク５４の底面となる背板５５は、開口５６が低くなるような傾斜面として形成した構造のものである。
【０００４】
このフラッシュゲートによれば、常時は起立止水状態にある堰板５２を乗り越えて上流側の水路５１の水が除々に流下する。この水は水タンク５４に内に流入して、水タンク５４の内部に溜められるので、堰板５２の重量が大きくなっている。この状態で水路５１の水位が所定の水位に達すると、堰板５２が自動的に転倒して、上流側の水路５１に溜められていた水が放流されて、フラッシュ洗浄がなされる。堰板５２が転倒することで、水タンク５４内に溜められていた水が流出し、堰板５２の重量が低減される。水路５１の水位が所定のレベルまで低下すると、巻上装置５３が作動し、堰板支持ワイヤ５７を介して堰板５２が再度起立させられる。
【０００５】
【特許文献１】
特開２００１−１３１９４５号公報
【０００６】
【発明が解決しようとする課題】
ところが、前記従来のフラッシュゲートでは、転倒した堰板５２を再度起立させる巻上装置５３や堰板支持ワイヤ５７などが別途必要である。このため、部品点数が多くなり、それだけ構造が複雑になるばかりか、電源設備が整備されていない場所での設置が制限されるなどの欠点を有している。
【０００７】
そこで、本発明出願人は、鋭意研究の結果、人力や電動機などの動力が必要な巻上装置を省略した簡単な構造によって、起立している弁体を自動的かつ確実に転倒させてフラッシュ洗浄することができるとともに、フラッシュ洗浄後には弁体を自動的かつ速やかに起立復帰させて次回のフラッシュ洗浄に備えて待機することができるフラッシュゲートを提案している（特願２００３−９８４３２号）。
【０００８】
本発明出願人による前記提案のフラッシュゲート（特願２００３−９８４３２号）によれば、従来のフラッシュゲートで必要な巻上装置を省略した簡単な構造によって、起立している弁体を自動的かつ確実に転倒させてフラッシュ洗浄を実行することができるとともに、フラッシュ洗浄後には、弁体を自動的かつ速やかに起立復帰させて次回のフラッシュ洗浄に備えて待機させることができる。しかも、電源設備が整備されていない場所での設置が可能になるので、設置場所の制限を緩和することができるなどの効果を奏することができる。
【０００９】
ところが、水路の水位が設計値を超える速度で、急激にフラッシュ実行水位を超えるレベルまで上昇する大量降雨時のような水量の急激な増大時には、大量の水が一気に下流域に流下するおそれを有している。
【００１０】
本発明は、このような事情を考慮してなされたもので、水位が設計値以下の速度で所定のフラッシュ実行水位まで上昇したときには、弁体のロックを解除してフラッシュ洗浄することができるとともに、水位が設計値を超える速度で急激にフラッシュ実行水位を超えるレベルまで上昇したときには、暫定的に貯水機能を発揮して下流域の保護を図ることができるばかりか、これらの機能を人力や電動機などの動力を不要にして自動的に発揮することができるフラッシュゲートを提供することを目的としている。
【００１１】
【課題を解決するための手段】
前記目的を達成するために、請求項１に記載の発明は、基部が水路の底部に起立・転倒自在に枢着されて該水路の閉塞・開放が可能であるとともに、起立止水状態および転倒の過程で前記水路の水が流入し、転倒状態で前記流入した水が排出される中空部を備えた弁体と、前記水路の水位がフラッシュ実行水位に上昇するまで該水路内の水の押圧力に抗して前記弁体の起立止水状態を保持して該水路を閉塞し、前記水位が設計値以下の速度でフラッシュ実行水位まで上昇するときには前記起立止水状態の保持を解除して、前記水の押圧力による弁体の転倒方向への傾動を許容する起立止水状態保持・解除手段と、前記水位が設計値を超える速度で急激にフラッシュ実行水位を超えるレベルまで上昇するときには前記起立止水状態保持・解除手段に干渉して弁体を起立止水状態に拘束する起立止水状態拘束手段と、前記フラッシュ実行水位を超えるレベルの水位をフラッシュ実行水位まで低下させて弁体の起立止水状態拘束を解除して前記水の押圧力による弁体の転倒方向への傾動を許容する水位低下用の排水通路と、転倒して前記水路を開放した前記弁体を起立させて該水路を閉塞させる起立止水状態復帰手段とを備え、前記起立止水状態保持・解除手段が前記弁体と該弁体が接離するゲート部に分割して設けられ、前記起立止水状態復帰手段と起立止水状態拘束手段が前記弁体に設けられているとともに、前記転倒方向への弁体の傾動開始によって該弁体に発生する転倒促進力が前記起立止水状態復帰手段に打ち勝って弁体を転倒させるように構成されていることを特徴としている。
【００１２】
請求項２に記載の発明のように、前記起立止水状態復帰手段を、弁体を起立方向に常時付勢するスプリングと、転倒している弁体が前記スプリングの付勢で起立止水状態に復帰するのに伴って復帰力を増大させる方向に移動する移動ウエイトによって構成することが好ましい。
【００１３】
請求項３に記載の発明のように、前記弁体が起立止水状態から転倒する過程で、該弁体の水路幅方向両側からの水の横洩れを規制する規制手段を設けることが好ましい。
【００１４】
請求項１に記載の発明は、弁体が起立して水路を閉塞している状態は、起立止水状態保持・解除手段の起立止水状態保持作用によって保持されて水路を閉塞している。閉塞されている水路の水位が設計値以下の速度でフラッシュ実行水位まで上昇すると、起立止水状態保持・解除手段の作用により弁体の起立止水状態保持作用が解除されて、弁体の転倒が許容される状態になる。
弁体には、前記フラッシュ実行水位まで上昇している水路内の水の圧力（水圧）が押圧力として負荷され、この押圧力が起立止水状態復帰手段の起立止水状態復帰作用に打ち勝って弁体を傾倒方向に少し傾動させる。
弁体が傾倒方向に少し傾動することで、弁体には、前記水圧による押圧力と、弁体の自重および中空部内に流入している水の重量の和によってなり、前記押圧力よりも大きい転倒促進力が発生する。これにより、弁体は急速に転倒して水路を開放し、該水路の水を急激に下流側に放流してフラッシュ洗浄が実行される。
フラッシュ洗浄の終了とほぼ同時に、中空部内の水が水路の下流側に排出される。その結果、起立止水状態復帰手段に抗する力は、該起立止水状態復帰手段の起立止水状態復帰力よりも小さい弁体の自重程度に低減され、弁体は速やかに起立止水状態に復帰して水路を閉塞する。弁体の起立止水状態復帰による水路の閉塞は、起立止水状態保持・解除手段の起立止水状態保持作用により保持されて、つぎのフラッシュ洗浄に備えて待機する。
一方、水路の水位が設計値を超える速度で急激にフラッシュ実行水位を超えるレベルまで上昇するときには、起立止水状態拘束手段が起立止水状態保持・解除手段に干渉して、弁体を起立止水状態に拘束することで、貯水機能を発揮して下流域の保護を図る。この場合、弁体の頂部を超えるレベルまでの増水がみられれば、頂部を超える量の水のみが、オーバーフロー水として下流域に流下して、水路の水位は弁体の頂部相当のレベルで安定する。
水路の水位が弁体の頂部相当のレベル以下で安定している状態では、水位低下用の排水通路から下流域に排水がなされて水路の水位を低下させる。水路の水位がフラッシュ実行水位まで低下した時点あるいはその直前で起立止水状態拘束手段による起立止水状態保持・解除手段の拘束が解除されて、前記と同様に弁体の転倒が許容される状態になる。
【００１５】
請求項２に記載の発明は、弁体に作用するスプリングの付勢力は、弁体が転倒状態から起立止水状態へ復帰するのに伴って漸次低下するものの、移動ウエイトが弁体の起立止水状態復帰に伴って復帰力を増大させる方向に移動することにより、スプリングの付勢力低下を補って、弁体を急速に起立止水状態に復帰させるように働く。
【００１６】
請求項３に記載の発明は、弁体が起立止水状態から転倒する過程で、該弁体の水路幅方向両側からの水の横洩れを規制して、フラッシュ洗浄の水勢を高めることができる。
【００１７】
【発明の実施の形態】
以下、本発明の一実施の形態を図面に基づいて説明する。図１は本発明の一実施の形態を示す正面図、図２は図１の左側面図、図３は図１の平面図、図４は図１のＡ−Ａ線上における弁体の拡大縦断側面図である。これらの図において、フラッシュゲート１は、弁体２と、起立止水状態保持・解除手段３と、起立止水状態復帰手段４と、起立止水状態拘束手段１１と、水位低下用の排水通路１２とを備えている。
【００１８】
弁体２は、内部に中空部２０を設けた空洞構造のもので、水路５の底部に基部２１が軸６によって回動自在に枢着されている。そして、図１、図２および図３に示す起立止水状態では、水路５に対向する側の裏板２２の幅方向両端部がゲート部７における幅方向両側の門柱７Ａ，７Ａのシール面７ａ，７ａに水密に当接しているとともに、裏板２２の下端部がゲート部７における下端横架部７Ｂのシール面７ｂに水密に当接して、水路５の水が下流域５Ａに流出するのを防止している。また、裏板２２には、弁体２の起立止水状態および後述する転倒の過程で水路５の水を中空部２０に流入させる開口２３が切欠して設けられ、天井（頂部）２４を切欠して中空部２０に通じる複数の排水孔２５が設られており、中空部２０の幅方向両端部には、後述する移動ウエイトの転動（移動）を許容する上下方向の移動ゾーン２６，２６が形成されている。
【００１９】
起立止水状態保持・解除手段３は、水路５の水位が設計値以下の速度でフラッシュ実行水位ＨＨＷＬに上昇するまで弁体２の起立止水状態を保持して水路５を閉塞し、水位が設計値以下の速度で緩やかにフラッシュ実行水位ＨＨＷＬまで上昇したときに弁体２の起立止水状態保持を解除して、該弁体２の転倒方向への傾動を許容するためのもので、弁体２と該弁体２が接離するゲート部７に分割して設けてある。すなわち、起立止水状態保持・解除手段３は、弁体２側の構成部材であるフロート３０、フロート棒３１および係脱機構３２と、ゲート部７側の構成要素である水平軸線を有する係合孔３３（図５（ａ），図５（ｂ）参照）とからなり、水平軸線を有する係合孔３３は、ゲート部７の門柱７Ａ，７Ａに形成してある。
【００２０】
弁体２側の構成部材であるフロート３０は、図１および図２で明らかなように、弁体２の中空部２０に上下移動自在に装入されてフロート棒３１の先端に取付けられている。また、係脱機構３２は、フロート３０およびフロート棒３１に連動可能に裏板２２の裏側に配置されている。なお、係脱機構３２は、弁体２の中空部２０内に配置してもよい。
【００２１】
係脱機構３２は、図５（ａ），図５（ｂ）に示すように、支軸３２Ａと、回動板３２Ｂと、一対のロッド３２Ｃ，３２Ｃと、制動機能付軸受３２Ｅ，３２Ｅを備えている。支軸３２Ａは、弁体２の中空部２０内で制動機能付軸受３２Ｅ，３２Ｅにより回動自在かつ水平に支持されているとともに、その一端部は弁体２の裏板２２を水密に貫通して弁体２の外部に突出しており、この突出端部に回動板３２Ｂの基部が固着されて、支軸３２Ａの回動と同時に回動板３２Ｂが回動するようになっている。また、支軸３２Ａには、弁体２の内部でフロート棒３１の基端部が固定されており、一対のロッド３２Ｃ，３２Ｃは、それぞれの基端部が回動板３２Ｂの自由端部に連結されて弁体２の裏板２２に沿って往復運動可能に水平に支持されている。なお、支軸３２Ａを回動自在かつ水平に支持している制動機能付軸受３２Ｅ，３２Ｅの制動力は、水路５の水位が設計値以下の速度で除々にフラッシュ実行水位ＨＷＬに向けて上昇する場合には、フロート３０の全体が水没するまでフロート３０の上昇が抑えられ、フロート３０の全体が水没した最大浮力の発生時において、設計値以下の速度で除々に上昇する水面に追従または若干の遅れを有して水没した状態で浮上できる値に設定されている。したがって、水路５の水位が設計値を超える速度で急激にフラッシュ実行水位ＨＷＬを超えるレベルまで上昇するときには、水面の上昇にフロート３０の浮上が追従しなくなって、フロート３０は水面の上昇よりもかなり遅れて浮上する。
【００２２】
前記各ロッド３２Ｃ，３２Ｃの先端部に水平軸線を有するロック爪部３２Ｄが設けられ、該ロック爪部３２Ｄは、ゲート部７側の構成要素である水平軸線を有する係合孔３３、つまり、ゲート部７の門柱７Ａ，７Ａに形成されている水平軸線を有する係合孔３３に係脱可能に対応している。すなわち、ロック爪部３２Ｄは、常時はスプリング３Ｓの付勢によってケース３４の外部に突出して保持されており、弁体２が起立止水状態に復帰する寸前でテーパ面３２ｄがゲート部７の門柱７Ａに干渉することで、スプリング３Ｓの付勢に抗してケース３４内に押圧されながら摺動し、弁体２が起立止水状態に復帰した時点で、ロック爪部３２Ｄ，３２Ｄが係合孔３３の位置に到達して、スプリング３Ｓの付勢によりケース３４から突出して係合孔３３に係合するように構成されている。
【００２３】
起立止水状態復帰手段４は、軸６の外周に巻回または軸６の内部に装入されて弁体２を起立方向に常時付勢するたとえば左右一対のつる巻スプリング４０，４０と、前記上下方向の移動ゾーン２６，２６に上下方向の転動（移動）を自在に装入された金属製の球体によってなる移動ウエイト４１とを備えている。なお、移動ウエイト４１は金属製の円柱または円筒によって構成してもよい。
【００２４】
起立止水状態拘束手段１１は、水路５の水位が設計値を超える速度で急激にフラッシュ実行水位ＨＷＬを超えるレベルまで上昇するときに、起立止水状態保持・解除手段３に干渉して、弁体２を起立止水状態に拘束するためのもので、図１〜図４に示すように、弁体２の中空部２０内における起立止水状態保持・解除手段３の上位の領域に配置されており、回動自在かつ水平に支持されている中心軸１１Ａと、この中心軸１１Ａに取付けられて該中心軸１１Ａの軸まわりに回転する歯車（セクタ−歯車であってもよい）１１Ｂと、基端部を中心軸１１Ａに同時回動可能に取付けたフロート棒１１Ｃと、このフロート棒１１Ｃの先端部に取付けたフロート１１Ｄと、弁体２の中空部２０内における係脱機構３２の上位の領域に昇降自在に配置されて歯車１１Ｂに噛み合うラック部材１１Ｅと、ラック部材１１Ｅに連設されて係脱機構３２におけるフロート棒３１の上位で対向する拘束部材１１Ｆとを備えている。
【００２５】
一方、水位低下用の排水通路１２は、フラッシュ実行水位ＨＷＬにおいて、弁体２を厚さ方向に貫通した１または複数本のパイプによって構成されている。なお、本実施の形態では、３本のパイプによって水位低下用の排水通路１２を構成している。
【００２６】
他方、図４に示すように、中空部２０はパンチングメタル８によって塞がれている。これにより、中空部２０への固形異物の侵入が防止されて、フロート３０、フロート棒３１、移動ウエイト４１、フロート１１Ｄ、フロート棒１１Ｃなどの適正な作動を確保することができる。なお、パンチングメタル８は、銅板または銀板で製作することが好ましい。パンチングメタル８を銅板または銀板で製作することにより、銅イオンあるいは銀イオンの抗菌作用が発揮されて、パンチングメタル８の表面に生物膜が形成される不都合を回避して、「ヌメリ」の生成を抑制できるので、パンチングメタル８の通水性能の低下を回避することができる。また、パンチングメタル８以外の接液部分（汚水に触れる部分）や摺動部分を銅材もしくは銀材によって構成または被覆したり、起立止水状態保持・解除手段３を構成しているフロート３０、フロート棒３１、係脱機構３２および起立止水状態拘束手段１１を構成している歯車１１Ｂ、フロート棒１１Ｃ、フロート１１Ｄ、ラック部材１１Ｆなどを銅材もしくは銀材によって構成して、「ヌメリ」の生成を抑制することが推奨される。
【００２７】
前記構成によれば、図２における水路５の水位がフラッシュ実行水位ＨＨＷＬよりも低い水位ＨＷＬまで上昇する間は、起立止水状態保持・解除手段３における係脱機構３２の一対のロッド３２Ｃ，３２Ｃの先端部に設けたロック爪部３２Ｄが図６（ｂ）のように門柱７Ａ，７Ａの係合孔３３に係合して（ただし、図６（ｂ）には１つのロッド３２Ｃ先端部のロック爪部３２Ａのみを示している）、弁体２の起立止水状態を保持して水路５を閉塞している。この閉塞状態では、水路５の水位が設計値以下の速度でＨＷＬのレベルまで上昇するのに伴って、弁体２の中空部２０内の水位が同じレベルまで上昇するものの、フロート３０は、制動機能付軸受３２Ｅ，３２Ｅの制動作用によって、全体が水没する最大浮力の発生時まで図１の破線で示す下限位置に静止している。
【００２８】
水路５の水位が設計値以下の速度で除々にフラッシュ実行水位ＨＨＷＬに向けて上昇し、開口２３が水没しても、弁体２の中空部２０内の水位がフラッシュ実行水位ＨＨＷＬと同じレベルまで除々に上昇する。全体が水没することで、最大浮力が発生したフロート３０は、設計値以下の速度で除々に上昇する中空部２０内の水面に追従または若干の遅れを有して上昇し、水路５の水位および中空部２０内の水位がフラッシュ実行水位ＨＨＷＬまで上昇した時点または若干の遅れを有して、フロート３０は図１，図５の二点鎖線で示す上限位置まで上昇する。これにより、起立止水状態保持・解除手段３における図５（ａ）に示す係脱機構３２の支軸３２Ａおよび回動板３２Ｂは時計まわりに回動して、一対のロッド３２Ｃ，３２Ｃを後退させ、一対のロッド３２Ｃ，３２Ｃの先端部に設けたロック爪部３２Ｄを図６（ａ）のように門柱７Ａ，７Ａの係合孔３３から退避させて（ただし、図６（ａ）には１つのロッド３２Ｃ先端部のロック爪部３２Ａのみを示している）、弁体２の起立止水状態保持作用を解除し、弁体２の転倒を許容する。この場合、金属製の移動ウエイト４１は、図１の破線で示すように、移動ゾーン２６，２６の底部、つまり弁体２の基部２１側に位置している。
【００２９】
弁体２には、フラッシュ実行水位ＨＨＷＬまで上昇している水路２内の水の圧力（水圧）が押圧力として負荷されているので、この押圧力が起立止水状態復帰手段４におけるつる巻スプリング４０，４０のバネ力に打ち勝って弁体２を傾倒方向（図２の時計まわりの方向）に少し傾動させる。
【００３０】
このように、弁体２が傾倒方向に少し傾動すると、弁体２には、前記水路２内の水圧による押圧力と、弁体２の自重および中空部２０内に流入している水の重量の和によってなり、前記押圧力よりも大きい転倒促進力が発生する。これにより、弁体２は図２の二点鎖線で示す転倒角θ＝９０＋α度の状態に急速に転倒して水路５を開放する。このため、該水路５の水は、弁体２に邪魔されることなく急激に下流域５Ａに放流されてフラッシュ洗浄が実行される。弁体２が転倒角９０＋α度の状態で転倒することにより、移動ゾーン２６，２６は前記α度に相当して図２の右下がりに傾斜する。したがって、図２の破線で示すように、弁体２の基部２１側に位置していた移動ウエイト４１は移動ゾーン２６，２６内を転動して、二点鎖線で示すように弁体２の天井２４よりも先端側に移動する。
【００３１】
前記フラッシュ洗浄の終了とほぼ同時に、中空部２０内の水は、弁体２の天井２４に設けた複数の排水孔２５から下流域５Ａに排出される。その結果、前記転倒促進力は中空部２０内に流入していた水の重量分に相当して大幅に低減され、起立止水状態復帰手段４におけるつる巻スプリング４０，４０のバネ力が弁体２の自重と、傾倒した弁体２の先端側に移動している移動ウエイト４１の重量を加算した値よりも大きく（強く）なって、弁体２が起立方向（図２の反時計まわりの方向）に回動して復帰し始める。
【００３２】
弁体２に作用するつる巻スプリング４０，４０のバネ力は、弁体２が転倒状態から起立止水状態へ復帰するのに伴って漸次低下するものの、移動ウエイト４１が弁体２の起立止水状態復帰に伴って、図２の二点鎖線で示す弁体２の天井２４側から破線で示す基部２１側に移動する。これによって、つる巻スプリング４０，４０のバネ力低下を補って、弁体２を図２の実線で示すように起立止水状態に急速に復帰させて、水路２を確実に閉塞するように働く。弁体２が起立止水状態に復帰して水路２を閉塞した場合には、フロート３０が図１の破線および図５の実線で示す位置に下降しているので、起立止水状態保持・解除手段３におけるロック爪部３２Ｄ，３２Ｄは、図６（ｂ）に示すように門柱７Ａ，７Ａの係合孔３３に係合して、弁体２の起立止水状態が保持され、つぎのフラッシュ洗浄に備えて待機する。
【００３３】
一方、水路５の水位が設計値を超える速度で急激にフラッシュ実行水位ＨＷＬを超えるレベルまで上昇しても、フロート３０は、制動機能付軸受３２Ｅ，３２Ｅの制動作用によって、全体が水没する最大浮力の発生時まで図１の破線で示す下限位置に静止し、しかも、全体が水没することで、最大浮力が発生しても、その浮上は、前述のように、設計値以下の速度で除々に上昇する水面に追従または若干の遅れを有する程度の緩慢なものであるため、水路５の水位は、フロート３０が図１，図５の二点鎖線で示す上限位置まで上昇するのに先行してフラッシュ実行水位ＨＨＷＬを超える領域にまで上昇し、弁体２の中空部２０内部では、起立止水状態拘束手段１１が配置されている起立止水状態保持・解除手段３よりも上位の領域まで水面（水位）が上昇することになる。その結果、フロート１１Ｄが図１の二点鎖線で示す上限位置まで上昇し、フロート棒１１Ｃおよび中心軸１１Ａを介して歯車１１Ｂを反時計まわりに回動させ、ラック部材１１Ｅを下降させて、該ラック部材１１Ｅに連設されている拘束部材１１Ｆの下端部を図１の一点鎖線で示す起立止水状態保持・解除手段３におけるフロート棒３１に干渉させて、これを上から押圧して、フロート３０が図１，図５の二点鎖線で示す上限位置まで上昇するのを妨げる。これにより、弁体２を起立止水状態に拘束することで、貯水機能を発揮して鉄砲水が一気に下流域に流下するのを防止して、下流域の保護を図ることができる。
【００３４】
水路５の水位がさらに上昇して弁体２の頂部を超えると、この頂部を超える量の水のみが、オーバーフロー水として下流域に流下して、水路５の水位は弁体２の頂部相当のレベルで安定する。このように、水路５の水位が弁体２の頂部相当のレベル以下で安定している状態、詳しくは、水路５の水位が弁体２の頂部以下のレベルとフラッシュ実行水位ＨＨＷＬを超えるレベルの範囲内で安定している状態では、水位低下用の排水通路１２から下流域に排水がなされて水路５の水位を低下させる。
【００３５】
水位低下用の排水通路１２から下流域に排水がなされることで、水路５の水位が低下すると、フロート１１Ｄが下降し、フロート棒１１Ｃおよび中心軸１１Ａを介して歯車１１Ｂを時計まわりに回動させ、ラック部材１１Ｅを上昇させる。水路５の水位がフラッシュ実行水位ＨＨＷＬまで低下する直前あるいはフラッシュ実行水位ＨＨＷＬまで低下した時点で、起立止水状態拘束手段１１における拘束部材１１Ｆの下端部によるフロート棒３１の干渉押圧が解除され、フロート３０が図１，図５の二点鎖線で示す上限位置まで上昇して、前述と同様に弁体２の転倒が許容されて、弁体２が転倒することになる。
【００３６】
このように、本発明に係るフラッシュゲート１は、図１２で説明した従来のフラッシュゲートで必要な巻上装置５３を省略した簡単な構造によって、水路５の水位が設計値以下の速度で所定のフラッシュ実行水位ＨＨＷＬまで上昇したときには、弁体２を自動的かつ確実に邪魔にならないように転倒させてフラッシュ洗浄を実行することができるとともに、フラッシュ洗浄後には、弁体２を自動的かつ速やかに起立復帰させて次回のフラッシュ洗浄に備えて待機させることができる。しかも、水路５の水位が設計値える速度で急激にフラッシュ実行水位ＨＨＷＬを超えるレベルまで上昇したときには、暫定的に貯水機能を発揮して下流域の保護を図ることができるばかりか、電源設備が整備されていない場所での設置が可能になるので、設置場所の制限を緩和することができる。
【００３７】
一方、図７に示すように、ゲート部７における幅方向両側の門柱７Ａ，７Ａに取付けた左右一対の側板９Ａ，９Ａによってなる規制手段９を設けることで、弁体２が前述の起立止水状態から転倒する過程で、該弁体２の水路幅方向両側からの水の横洩れを規制して、フラッシュ洗浄の水勢を高めて、フラッシュ洗浄効果を上げることができる。規制手段９は、門柱７Ａ，７Ａに取付けた左右一対の側板９Ａ，９Ａのみに限らず、門柱７Ａ，７Ａの形状によっては、図８に示すように、弁体２の幅方向両側に取付けた左右一対の側板９Ａ，９Ａによって構成してもよい。また、左右一対の側板９Ａ，９Ａに代えて、弁体２の起立・転倒に追従して伸縮する蛇腹（ベロー）によってなる規制手段９を設けてもよい。前記規制手段９を銅板または銀板で製作することによって、銅イオンあるいは銀イオンの抗菌作用が発揮されて、規制手段９の表面に生物膜が形成される不都合を回避して、「ヌメリ」の生成を抑制することができる。
【００３８】
なお、図９，図１０および図１１に示すように、起立止水状態保持・解除手段３を、ゲート部７側の構成部材である係脱機構３２と、弁体２側の構成要素である係合孔３３とで構成してもよい。図９において、前記図５（ａ），図５（ｂ）と同一部分には同一符号を付して重複する構造および作用の説明は省略する。図９の係脱機構３２は、内部に水路５の水を導入・排出できるように構成したゲート部７の一方の門柱７Ａと、この門柱７Ａの内部に上下移動自在に装入したフロート３２Ｎと、基部が門柱７Ａに枢着され、内端部が門柱７Ａの内部でフロート３２Ｎの上側に臨んでいるとともに、外端部が門柱７Ａの外部に臨出しているレバー３２Ｏと、下端部がレバー３２Ｏの外端部に枢着され、上端部がディスク３２Ｐの側面に枢着されている上下方向のロッド３２Ｑと、ゲート部７の上端横架部７Ｃの前側に回転自在に配置されているとともに、一端部にディスク３２Ｐを同時回動可能に取付けた水平回動軸３２Ｒと、水平回動軸３２Ｒに同時回動可能に取付けた一対の回動アーム３２Ｓ，３２Ｓとを有し、回動アーム３２Ｓ，３２Ｓの作動端部に連結棒３２Ｔの上端部が枢着され、連結棒３２Ｔの下端部には、先端部が垂直軸線を有して下向きに突出するロック爪部３２Ｄを収容保持している上下移動可能なケース３４を枢着した構造になっており、弁体２側の構成要素である一対の係合孔３３，３３は、弁体２の天井２４に垂直軸線を有してロック爪部３２Ｄに対応して設けてある。このような構造のゲート部７側の構成部材である係脱機構３２と、弁体２側の構成要素である一対の係合孔３３，３３とを有する起立止水状態保持・解除手段３であっても、前記第１実施の形態で説明した起立止水状態保持・解除手段３と同様の作用・効果を奏することができる。
【００３９】
また、一方の門柱７Ａにおけるレバー３２Ｏの上位に対向して、起立止水状態拘束手段１１の構成部材であるフロート１１Ｄを上下移動自在に装入し、このフロート１１Ｄに対して、レバー１１Ｇを介して拘束部材１１Ｆを連結し、この拘束部材１１Ｆの下端部をレバー３２Ｏの上側に対向して配置して、水路５の水位が設計値を超える速度で急激にフラッシュ実行水位ＨＷＬを超えるレベルまで上昇するときに、拘束部材１１Ｆをレバー３２Ｏに干渉させて、弁体２を起立止水状態に拘束するようにしてもよい。
【００４０】
すなわち、図９の起立止水状態保持・解除手段３では、水路５の水位が設計値以下の速度で除々にフラッシュ実行水位ＨＨＷＬまで上昇することで、一方の門柱７Ａ内の水位が同じレベルまで上昇してフロート３２Ｎが浮上したたときに、レバー３２Ｏおよびロッド３２Ｑを介してディスク３２Ｐと水平回動軸３２Ｒおよび一対の回動アーム３２Ｓ，３２Ｓを図１３、１１（ｃ）の反時計まわりに回動させてケース３４、３４を引上げることで、ロック爪部３２Ｄを弁体２の天井２４に設けた係合孔３３から退避させて、弁体２の起立止水状態保持作用を解除し、弁体２の転倒を許容することができる。また、弁体２が起立止水状態に復帰する寸前でロック爪部３２Ｄのテーパ面３２ｄが弁体２の天井２４に干渉することで、スプリング３Ｓの付勢に抗してケース３４内に押圧されながら摺動し、弁体２が起立止水状態に復帰した時点で、ロック爪部３２Ｄが係合孔３３の位置に到達して、スプリング３Ｓの付勢によりケース３４，３４から突出して係合孔３３，３３に係合することにより、弁体２の起立止水状態を保持して、つぎのフラッシュ洗浄に備えて待機させることができる。
【００４１】
一方、水路５の水位が設計値を超える速度で急激にフラッシュ実行水位ＨＷＬを超えるレベルまで上昇しても、フロート３２Ｎは、係脱機構３２の制動作用によって、全体が水没する最大浮力の発生時まで下限位置に静止し、しかも、全体が水没することで、最大浮力が発生しても、その浮上は、前述のように、設計値以下の速度で除々に上昇する水面に追従または若干の遅れを有する程度の緩慢なものであるため、水路５の水位は、フロート３２Ｎが上限位置まで上昇するのに先行してフラッシュ実行水位ＨＨＷＬを超える領域にまで上昇し、一方の門柱７Ａの内部では、起立止水状態拘束手段１１が配置されている起立止水状態保持・解除手段３よりも上位の領域まで水面（水位）が上昇することになる。その結果、フロート１１Ｄが上限位置まで上昇し、レバー１１Ｇを介して拘束部材１１Ｆを下降させ、該拘束部材１１Ｆの下端部をレバー３２Ｏに干渉させて、これを上から押圧して、フロート３０Ｎが上限位置まで上昇するのを妨げる。これにより、弁体２を起立止水状態に拘束することで、貯水機能を発揮して鉄砲水が一気に下流域に流下するのを防止して、下流域の保護を図ることができる。
【００４２】
水路５の水位がさらに上昇して弁体２の頂部を超えると、この頂部を超える量の水のみが、オーバーフロー水として下流域に流下して、水路５の水位は弁体２の頂部相当のレベルで安定する。このように、水路５の水位が弁体２の頂部相当のレベル以下で安定している状態、詳しくは、水路５の水位が弁体２の頂部以下のレベルとフラッシュ実行水位ＨＨＷＬを超えるレベルの範囲内で安定している状態では、水位低下用の排水通路１２から下流域に排水がなされて水路５の水位を低下させることができる。なお、この実施の形態では、水位低下用の排水通路１２を一方の門柱７Ａに設けてもよい。
【００４３】
さらに、前記各実施の形態において、起立止水状態復帰手段４の構成部材であるつる巻スプリング４０，４０のばね力の調整可能なばね力調整手段（不図示）を付設しておくことで、つる巻スプリング４０，４０のばね力を調整することができるので、起立している弁体２を自動的かつ確実に転倒させてフラッシュ洗浄させる動作と、フラッシュ洗浄後に弁体２を速やかに起立復帰させる動作の調整をフラッシュゲート１の据付現場において容易に行うことができる。
【００４４】
【発明の効果】
以上説明したように、本発明のフラッシュゲートは構成されているので、以下のような効果を奏する。
【００４５】
請求項１に記載の発明によれば、従来のフラッシュゲートで必要な巻上装置を省略した簡単な構造によって、水路の水位が設計値以下の速度で所定のフラッシュ実行水位まで上昇したときには、起立している弁体を自動的かつ確実に転倒させてフラッシュ洗浄を実行することができるとともに、フラッシュ洗浄後には、弁体を自動的かつ速やかに起立復帰させて次回のフラッシュ洗浄に備えて待機させることができる。しかも、水路の水位が設計値える速度で急激にフラッシュ実行水位を超えるレベルまで上昇したときには、暫定的に貯水機能を発揮して下流域の保護を図ることができるばかりか、電源設備が整備されていない場所での設置が可能になるので、設置場所の制限を緩和することができる。
【００４６】
請求項２に記載の発明によれば、弁体が転倒状態から起立止水状態へ復帰するのに伴って漸次低下するスプリングの付勢力を移動ウエイトの移動により補って、弁体を急速に起立止水状態に復帰させ水路を確実に閉塞することができる。
【００４７】
請求項３に記載の発明によれば、弁体が起立止水状態から転倒する過程で、該弁体の水路幅方向両側からの水の横洩れを規制し、フラッシュ洗浄の水勢を高めて、フラッシュ洗浄効果を上げることができる。
【図面の簡単な説明】
【図１】本発明の一実施の形態を示す正面図である。
【図２】図１の左側面図である。
【図３】図１の平面図である。
【図４】図１のＡ−Ａ線上における弁体の拡大縦断側面図である。
【図５】起立止水状態保持・解除手段の一例を示す構成図である。
【図６】起立止水状態保持・解除手段の作動説明図である。
【図７】規制手段の一例を示す斜視図である。
【図８】規制手段の他の例を示す斜視図である。
【図９】本発明の他の実施の形態を示す斜視図である。
【図１０】図９の弁体を閉じた状態の側面図である。
【図１１】図９の弁体のロック状態を示す拡大側面図である。
【図１２】従来例の縦断側面図である。
【符号の説明】
１フラッシュゲート
２弁体
３起立止水状態保持・解除手段
４起立止水状態復帰手段
５水路
７ゲート部
９規制手段
１１起立止水状態拘束手段
１２水位低下用の排水通路
２０弁体の中空部
２１弁体の基部
４０スプリング
４１移動ウエイト
ＨＨＷＬフラッシュ実行水位[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a flash gate suitable for flash cleaning of rivers, sewage drains, irrigation channels, and the like.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been known a flash gate for periodically flush-cleaning a river, a sewage drain, an irrigation channel, and the like (for example, see Patent Document 1).
[0003]
As shown in FIG. 12, the flash gate includes a stand-up / overturnable weir plate 52 whose base 50 is pivotally connected to the bottom of a water channel 51, and a hoisting device 53 installed on a dike. The weir plate 52 supported in the standing water stop state by the device 53 is overturned by the rise of the water level of the water channel 51 by a certain level or more, and the flush cleaning is performed, and the water level of the water channel 51 is increased to a predetermined rising water level by the flush cleaning. When it is lowered, the hoisting device 53 is activated and the weir plate 52 is erected again. The weir plate 52 is provided with a water tank 54 into which the water in the water channel 51 flows. An upward opening 56 having an area equal to or greater than the cross-sectional area of the water tank 54 is formed, and the back plate 55 serving as the bottom surface of the water tank 54 when the weir plate 52 falls over is inclined such that the opening 56 is lowered. surface And those having a structure formed.
[0004]
According to this flash gate, the water in the upstream water passage 51 gradually flows down over the weir plate 52 which is always in the standing water stop state. This water flows into the water tank 54 and is stored inside the water tank 54, so that the weight of the weir plate 52 is increased. When the water level of the water channel 51 reaches a predetermined water level in this state, the weir plate 52 automatically falls over, and the water stored in the upstream water channel 51 is discharged, and flush cleaning is performed. When the weir plate 52 falls, the water stored in the water tank 54 flows out, and the weight of the weir plate 52 is reduced. When the water level in the water channel 51 drops to a predetermined level, the hoisting device 53 is activated, and the weir plate 52 is erected again via the weir plate support wire 57.
[0005]
[Patent Document 1]
JP 2001-131945 A
[Problems to be solved by the invention]
However, in the above-mentioned conventional flash gate, a hoisting device 53 and a weir plate supporting wire 57 for raising the overturned weir plate 52 again are separately required. For this reason, the number of parts is increased, the structure becomes more complicated, and there are drawbacks such that installation in a place where power supply facilities are not maintained is restricted.
[0007]
Therefore, as a result of diligent research, the present applicant has conducted a flash cleaning by automatically and surely overturning a standing valve element with a simple structure in which a hoisting device that requires power such as human power or an electric motor is omitted. Japanese Patent Application No. 2003-98432 proposes a flash gate which can automatically and quickly raise and return the valve body after flash cleaning and can wait for the next flash cleaning.
[0008]
According to the flash gate proposed by the applicant of the present invention (Japanese Patent Application No. 2003-98432), the upright valve body can be automatically and automatically formed by a simple structure in which a hoisting device required in a conventional flash gate is omitted. The flash cleaning can be executed by reliably turning over, and after the flash cleaning, the valve body can be automatically and quickly raised and returned to a standby state for the next flash cleaning. In addition, since the power supply can be installed in a place where the power supply facilities are not provided, it is possible to achieve an effect that the restriction on the installation place can be eased.
[0009]
However, when the water level in the canal suddenly increases to a level exceeding the flushing level at a speed exceeding the design value, such as during heavy rainfall, a large amount of water may flow down to the downstream area at once. are doing.
[0010]
The present invention has been made in view of such circumstances, and when the water level rises to a predetermined flush execution water level at a speed equal to or lower than a design value, the valve body can be unlocked and flush cleaning can be performed. When the water level suddenly rises to a level that exceeds the flushing water level at a speed exceeding the design value, not only can the water storage function be tentatively exerted to protect the downstream area, but also these functions can be used by humans and motors. It is an object of the present invention to provide a flash gate that can automatically exert power without the need for such a power.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, the base is pivotally attached to the bottom of the waterway so that the waterway can be closed and opened, and the waterway can be closed and opened. A valve body having a hollow portion into which the water in the water channel flows in during the process and the water that has flowed in the upside down state is discharged, and the water in the water channel is pushed until the water level of the water channel rises to the flushing water level. When the water level rises to the flush execution water level at a speed equal to or lower than the design value, the standing water stop state is released by closing the water passage while maintaining the standing water stop state of the valve body against pressure. A standing water stopping state holding / releasing means for permitting the valve body to tilt in the overturning direction by the pressing force of the water, and the above-mentioned when the water level rises rapidly to a level exceeding the flush execution water level at a speed exceeding a design value. Standing and stopping water holding / releasing hand Standing water stopping state restraining means for restraining the valve body in the standing water stopping state by interfering with the valve body, and releasing the standing water stopping state restraint of the valve body by lowering the water level at a level exceeding the flush execution water level to the flush execution water level. A drain passage for lowering the water level that allows the valve body to tilt in the overturning direction due to the pressing force of the water, and a standing water stop state in which the valve body that has been overturned to open the water passage is closed to close the water passage. Return means, wherein the standing water stopping state holding / releasing means is provided separately in the valve body and a gate portion where the valve body comes in contact with and separates from the valve body, and the standing water stopping state returning means and the standing water stopping state restraining means are provided. Is provided on the valve body, and the overturning force generated by the valve body due to the start of tilting of the valve body in the overturning direction overcomes the standing water stop state returning means and causes the valve body to overturn. Is characterized by being .
[0012]
As in the invention as set forth in claim 2, the standing water stopping state returning means includes a spring that constantly urges the valve body in the rising direction, and a falling valve body is in the standing water stopping state by urging the spring. It is preferable to use a moving weight that moves in a direction that increases the restoring force as it returns to the position.
[0013]
As in the third aspect of the present invention, it is preferable to provide a regulating means for regulating lateral leakage of water from both sides of the valve body in the water channel width direction when the valve body falls from the standing water stopping state.
[0014]
According to the first aspect of the present invention, the state in which the valve body stands up and closes the water passage is held by the standing water stopping state holding action of the standing water stopping state holding / releasing means to close the water passage. When the water level of the closed water channel rises to the flushing water level at a speed lower than the design value, the operation of the standing water stopping state holding / releasing means releases the standing water stopping state holding action of the valve body, and the valve body falls. Will be in an acceptable state.
The pressure (water pressure) of the water in the water channel rising to the flush execution water level is applied to the valve body as a pressing force, and this pressing force overcomes the standing water stopping state returning action of the standing water stopping state returning means. Tilt the valve slightly in the tilting direction.
By slightly tilting the valve body in the tilting direction, the valve body is formed by the sum of the pressing force of the water pressure, the weight of the valve body and the weight of water flowing into the hollow portion, and is larger than the pressing force. The fall promotion power is generated. As a result, the valve body rapidly falls to open the water channel, and the water in the water channel is rapidly discharged to the downstream side to execute the flush cleaning.
Almost simultaneously with the end of the flush cleaning, the water in the hollow portion is discharged to the downstream side of the water channel. As a result, the force resisting the standing water stopping state returning means is reduced to about the own weight of the valve body which is smaller than the standing water stopping state returning force of the standing water stopping state returning means, and the valve body is quickly brought into the standing water stopping state. To close the waterway. The blockage of the water channel due to the return of the valve body to the standing water stopping state is maintained by the standing water stopping state holding action of the standing water stopping state holding / releasing means, and waits for the next flush cleaning.
On the other hand, when the water level of the water channel rapidly rises to a level exceeding the flushing water level at a speed exceeding the design value, the standing water stopping state restraining means interferes with the standing water stopping state holding / releasing means and stops the valve body. By constraining in the water condition, the water storage function is exhibited and the downstream area is protected. In this case, if the water increases to a level that exceeds the top of the valve, only the amount of water that exceeds the top will flow down to the downstream area as overflow water, and the water level in the water channel will be stable at a level equivalent to the top of the valve. I do.
In a state where the water level of the water channel is stable at a level equal to or lower than the level corresponding to the top of the valve body, the water is drained from the drainage passage for lowering the water level to the downstream area, and the water level of the water channel is lowered. When the water level of the water channel falls to the flushing water level or immediately before that, the restraint of the standing water stopping state holding / releasing means by the standing water stopping state restraining means is released, and the valve body is allowed to fall as described above. become.
[0015]
According to the second aspect of the present invention, the urging force of the spring acting on the valve element gradually decreases as the valve element returns from the overturned state to the standing water stop state, but the movable weight is used to stop the valve element from standing up. By moving in the direction to increase the restoring force along with the return of the water state, it works to compensate for the decrease in the urging force of the spring and quickly return the valve body to the standing water stop state.
[0016]
According to the third aspect of the present invention, in the process of the valve body falling from the standing water stopping state, lateral leakage of water from both sides in the water channel width direction of the valve body can be regulated, and the water force of flush cleaning can be increased. .
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to the drawings. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a left side view of FIG. 1, FIG. 3 is a plan view of FIG. 1, and FIG. 4 is an enlarged longitudinal section of a valve body taken along line AA of FIG. It is a side view. In these figures, the flash gate 1 is provided with a valve body 2, a standing water stopping state holding / releasing means 3, a standing water stopping state returning means 4, a standing water stopping state restraining means 11, and a drainage passage for lowering the water level. 12 is provided.
[0018]
The valve body 2 has a hollow structure in which a hollow portion 20 is provided, and a base 21 is pivotally attached to the bottom of the water channel 5 by a shaft 6 so as to be rotatable. In the standing water stoppage state shown in FIGS. 1, 2 and 3, both ends in the width direction of the back plate 22 on the side facing the water channel 5 are sealing surfaces 7 a of the gate columns 7 A on both sides in the width direction of the gate 7. , 7a, and the lower end of the back plate 22 abuts the sealing surface 7b of the lower horizontal portion 7B of the gate 7, so that the water in the water channel 5 flows out to the downstream area 5A. Has been prevented. The back plate 22 is provided with a cutout opening 23 through which water in the water passage 5 flows into the hollow portion 20 in the standing water stop state of the valve body 2 and in the process of falling, which will be described later, and a ceiling (top) 24 is cut out. A plurality of drain holes 25 communicating with the hollow portion 20 are provided. Both ends in the width direction of the hollow portion 20 are vertically movable zones 26, 26 which allow rolling (moving) of a moving weight described later. Is formed.
[0019]
The standing water stopping state holding / releasing means 3 closes the water channel 5 by holding the standing water stopping state of the valve body 2 until the water level of the water channel 5 rises to the flush execution water level HHWL at a speed equal to or lower than the design value. When the flush execution water level HHWL rises slowly at a speed equal to or lower than the design value, the valve body 2 is released from holding the standing water stop state, and the valve body 2 is allowed to tilt in the overturning direction. The body 2 is provided separately from a gate portion 7 where the valve body 2 comes into contact with and separates from the valve body 2. That is, the standing / water stopping state holding / releasing means 3 is engaged with the float 30, the float rod 31, and the engagement / disengagement mechanism 32, which are components on the valve element 2 side, and has a horizontal axis which is a component on the gate part 7 side. The engagement holes 33 each having a hole 33 (see FIGS. 5A and 5B) and having a horizontal axis are formed in the gate columns 7A and 7A of the gate portion 7.
[0020]
1 and 2, the float 30 which is a component on the valve body 2 side is vertically movably inserted into the hollow portion 20 of the valve body 2 and attached to the tip of a float rod 31. . The engagement / disengagement mechanism 32 is disposed on the back side of the back plate 22 so as to be able to interlock with the float 30 and the float bar 31. In addition, the engagement / disengagement mechanism 32 may be disposed in the hollow portion 20 of the valve body 2.
[0021]
As shown in FIGS. 5A and 5B, the engagement / disengagement mechanism 32 includes a support shaft 32A, a rotating plate 32B, a pair of rods 32C, 32C, and bearings 32E, 32E with a braking function. ing. The support shaft 32A is rotatably and horizontally supported in the hollow portion 20 of the valve body 2 by bearings with braking functions 32E, 32E, and one end thereof penetrates the back plate 22 of the valve body 2 in a watertight manner. The base of the turning plate 32B is fixed to the protruding end of the valve body 2 so that the turning plate 32B turns simultaneously with the turning of the support shaft 32A. The base end of the float rod 31 is fixed to the support shaft 32A inside the valve body 2, and the base ends of the pair of rods 32C, 32C are connected to the free end of the rotary plate 32B. It is connected and horizontally supported so as to be able to reciprocate along the back plate 22 of the valve body 2. The braking force of the bearings 32E, 32E having a braking function that rotatably and horizontally supports the support shaft 32A gradually increases toward the flush execution water level HWL at a speed at which the water level of the water channel 5 is equal to or lower than a design value. In this case, the rise of the float 30 is suppressed until the entire float 30 is submerged. When the maximum buoyancy is generated when the entire float 30 is submerged, the float 30 follows the water surface gradually rising at a speed lower than the design value or slightly. It is set to a value that allows the user to ascend in a state of being submerged with a delay. Therefore, when the water level of the water channel 5 suddenly rises to a level exceeding the flush execution water level HWL at a speed exceeding the design value, the floating of the float 30 does not follow the rising of the water surface, and the float 30 is considerably higher than the rising of the water surface. Ascends late.
[0022]
A lock claw portion 32D having a horizontal axis is provided at the tip of each of the rods 32C, 32C. The lock claw portion 32D has an engagement hole 33 having a horizontal axis which is a component on the gate portion 7, that is, a gate. It corresponds to an engagement hole 33 having a horizontal axis formed in the gate post 7A, 7A of the part 7 so as to be detachable. That is, the lock claw portion 32D is normally protruded and held out of the case 34 by the bias of the spring 3S, and the tapered surface 32d is connected to the gate portion 7 just before the valve body 2 returns to the standing water stop state. By interfering with 7A, the locking pawls 32D, 32D are engaged when the valve body 2 returns to the standing water stopping state while being pressed into the case 34 against the bias of the spring 3S. It is configured to reach the position of the hole 33 and protrude from the case 34 by the bias of the spring 3 </ b> S to engage with the engagement hole 33.
[0023]
The standing water stopping state returning means 4 is, for example, a pair of left and right helical springs 40, 40 which are wound around the outer periphery of the shaft 6 or are inserted into the shaft 6 to constantly bias the valve body 2 in the rising direction. A moving weight 41 formed of a metal sphere is provided in the vertically moving zones 26, 26 so as to freely roll (move) in the vertical direction. Note that the moving weight 41 may be configured by a metal column or cylinder.
[0024]
When the water level in the water channel 5 rapidly rises to a level exceeding the flush execution water level HWL at a speed exceeding the design value, the rising water stopping state restraining means 11 interferes with the rising water stopping state holding / releasing means 3 and causes a valve. For restraining the body 2 in the standing water stopping state, as shown in FIGS. 1 to 4, the valve 2 is disposed in a region above the standing water stopping state holding / releasing means 3 in the hollow portion 20 of the valve body 2. A central shaft 11A rotatably and horizontally supported, a gear (or a sector gear) 11B attached to the central shaft 11A and rotating around the axis of the central shaft 11A; A float rod 11C having a base end rotatably attached to the central shaft 11A, a float 11D attached to the distal end of the float rod 11C, and an upper / lower part of the engagement / disengagement mechanism 32 in the hollow portion 20 of the valve body 2. Placed up and down freely in the area It includes a rack member 11E meshing with the gear 11B, and a restraining member 11F which is provided continuously to the rack member 11E are opposed to each other in the upper float rod 31 in the detachment mechanism 32 Te.
[0025]
On the other hand, the drainage passage 12 for lowering the water level is constituted by one or a plurality of pipes penetrating the valve body 2 in the thickness direction at the flush execution water level HWL. In the present embodiment, a drainage passage 12 for lowering the water level is formed by three pipes.
[0026]
On the other hand, as shown in FIG. 4, the hollow portion 20 is closed by the punching metal 8. This prevents solid foreign matter from entering the hollow portion 20 and ensures proper operation of the float 30, the float bar 31, the moving weight 41, the float 11D, the float bar 11C, and the like. The punching metal 8 is preferably made of a copper plate or a silver plate. By manufacturing the punching metal 8 from a copper plate or a silver plate, the antibacterial action of copper ions or silver ions is exerted, thereby avoiding the inconvenience of forming a biofilm on the surface of the punching metal 8 and generating “numery”. Therefore, it is possible to avoid a decrease in the water permeation performance of the punching metal 8. In addition, a float 30 that constitutes or covers a liquid contact portion (a portion that comes into contact with wastewater) or a sliding portion other than the punching metal 8 with a copper material or a silver material, or constitutes a standing water stopping state holding / releasing means 3; The gear 11B, the float rod 11C, the float 11D, the rack member 11F and the like constituting the float rod 31, the disengaging mechanism 32 and the standing water stopping state restraining means 11 are made of a copper material or a silver material. It is recommended to suppress generation.
[0027]
According to the above configuration, while the water level of the water channel 5 in FIG. 2 rises to a water level HWL lower than the flush execution water level HHWL, the pair of rods 32C, 32C of the engagement / disengagement mechanism 32 in the standing and stopped water state holding / releasing means 3 6B engages with the engaging holes 33 of the gate posts 7A, 7A as shown in FIG. 6B (however, in FIG. Only the lock claw portion 32A is shown), and the water passage 5 is closed while the standing and stopping state of the valve body 2 is maintained. In this closed state, the water level in the hollow portion 20 of the valve body 2 rises to the same level as the water level in the water channel 5 rises to the HWL level at a speed lower than the design value, but the float 30 Due to the braking action of the functional bearings 32E, 32E, the bearings are stationary at the lower limit position indicated by the broken line in FIG.
[0028]
Even if the water level of the water channel 5 gradually rises toward the flush execution water level HHWL at a speed equal to or lower than the design value, and even when the opening 23 is submerged, the water level in the hollow portion 20 of the valve body 2 reaches the same level as the flush execution water level HHWL. Gradually rise. The float 30 in which the maximum buoyancy is generated by the whole being submerged follows the water surface in the hollow portion 20 gradually rising at a speed lower than the design value or rises with a slight delay, and the water level of the water channel 5 and When the water level in the hollow portion 20 rises to the flushing water level HHWL or with a slight delay, the float 30 rises to the upper limit position shown by the two-dot chain line in FIGS. As a result, the support shaft 32A and the rotating plate 32B of the engaging and disengaging mechanism 32 shown in FIG. 5A in the standing water stopping state holding / releasing means 3 rotate clockwise, and retreat the pair of rods 32C, 32C. Then, the lock claw 32D provided at the distal end of the pair of rods 32C, 32C is retracted from the engagement hole 33 of the gate posts 7A, 7A as shown in FIG. 6A (however, FIG. Only the lock claw 32A at the tip of one rod 32C is shown), and the valve body 2 releases the standing water stopping state holding action, and allows the valve body 2 to fall. In this case, the metal moving weight 41 is located at the bottom of the moving zones 26, 26, that is, on the base 21 side of the valve body 2, as shown by the broken line in FIG.
[0029]
Since the pressure (water pressure) of the water in the water channel 2 rising to the flush execution water level HHWL is applied to the valve body 2 as the pressing force, the pressing force is applied to the helical spring in the standing water stopping state returning means 4. The valve body 2 is slightly tilted in the tilting direction (clockwise direction in FIG. 2) by overcoming the spring forces of 40 and 40.
[0030]
When the valve body 2 is slightly tilted in the tilting direction, the pressing force of the water pressure in the water passage 2 and the weight of the valve body 2 and the weight of the water flowing into the hollow portion 20 are applied to the valve body 2. , And an overturning acceleration force greater than the pressing force is generated. As a result, the valve body 2 rapidly falls to the state of the falling angle θ = 90 + α degrees shown by the two-dot chain line in FIG. Therefore, the water in the water channel 5 is rapidly discharged to the downstream region 5A without being disturbed by the valve body 2, and the flush cleaning is performed. When the valve body 2 falls down at a falling angle of 90 + α degrees, the moving zones 26, 26 are inclined to the lower right in FIG. Therefore, as shown by the dashed line in FIG. 2, the moving weight 41 located on the base 21 side of the valve body 2 rolls in the moving zones 26, 26, and as shown by the two-dot chain line, It moves to the tip side from the ceiling 24.
[0031]
Almost simultaneously with the end of the flush cleaning, the water in the hollow portion 20 is discharged to the downstream region 5A from a plurality of drain holes 25 provided in the ceiling 24 of the valve body 2. As a result, the falling acceleration force is greatly reduced corresponding to the weight of the water flowing into the hollow portion 20, and the spring force of the helical springs 40, 40 in the standing water stopping state returning means 4 is reduced by the valve body. 2 and the weight of the moving weight 41 moving to the tip end side of the tilted valve body 2 becomes larger (stronger) than the value obtained by adding the weight, and the valve body 2 stands up (in the counterclockwise direction in FIG. 2). Direction) and starts to return.
[0032]
Although the spring force of the helical springs 40, 40 acting on the valve body 2 gradually decreases as the valve body 2 returns from the overturned state to the standing water stopping state, the moving weight 41 stops the valve body 2 from standing up. With the return of the water state, the valve body 2 moves from the ceiling 24 side indicated by the two-dot chain line to the base 21 side indicated by the broken line in FIG. Thereby, the spring force of the helical springs 40, 40 is compensated for, and the valve body 2 is quickly returned to the standing water stop state as shown by the solid line in FIG. . When the valve body 2 returns to the standing water stop state and closes the water channel 2, the float 30 is lowered to the position shown by the broken line in FIG. 1 and the solid line in FIG. As shown in FIG. 6B, the lock claws 32D, 32D of the means 3 are engaged with the engagement holes 33 of the gate posts 7A, 7A, so that the valve body 2 is kept in the standing water-stop state, and the next flushing is performed. Wait for cleaning.
[0033]
On the other hand, even if the water level of the water channel 5 suddenly rises to a level exceeding the flush execution water level HWL at a speed exceeding the design value, the float 30 causes the maximum buoyancy in which the entire float is submerged by the braking action of the bearings with braking functions 32E, 32E. 1 is stopped at the lower limit position indicated by the broken line in FIG. 1, and even if the entire body is submerged, even if the maximum buoyancy is generated, as described above, the buoyancy gradually increases at a speed lower than the design value. Since the water level of the water channel 5 is so slow that it follows the rising water surface or has a slight delay, the water level of the water channel 5 is preceded by the rise of the float 30 to the upper limit position shown by the two-dot chain line in FIGS. The water level rises to a region exceeding the flushing water level HHWL, and in the hollow portion 20 of the valve body 2, the water surface reaches a region higher than the standing water stopping state holding / releasing means 3 in which the standing water stopping state restraining means 11 is disposed. ( So that the position) is increased. As a result, the float 11D rises to the upper limit position shown by the two-dot chain line in FIG. 1, rotates the gear 11B counterclockwise through the float rod 11C and the center shaft 11A, and lowers the rack member 11E, The lower end of the restraining member 11F connected to the rack member 11E is caused to interfere with the float bar 31 of the standing water stopping state holding / releasing means 3 shown by the dashed line in FIG. 30 is prevented from rising to the upper limit position shown by the two-dot chain line in FIGS. Thus, by constraining the valve body 2 in the standing water stop state, a water storage function is exhibited to prevent flash flood from flowing down to the downstream area at a stretch, thereby protecting the downstream area.
[0034]
When the water level of the water channel 5 further rises and exceeds the top of the valve body 2, only the amount of water exceeding the top flows down to the downstream area as overflow water, and the water level of the water channel 5 is equivalent to the top of the valve body 2. Stabilizes at the level. In this manner, the water level of the water channel 5 is stable at a level equal to or lower than the level corresponding to the top of the valve body 2, specifically, the water level of the water channel 5 is lower than the level of the top of the valve body 2 and higher than the flush execution water level HHWL. In a stable state within the range, drainage is performed from the drainage passage 12 for lowering the water level to the downstream area, and the water level in the waterway 5 is lowered.
[0035]
When the water level in the water channel 5 is lowered by drainage from the water level lowering drain passage 12 to the downstream area, the float 11D descends, and the gear 11B rotates clockwise through the float rod 11C and the center shaft 11A. Then, the rack member 11E is raised. Immediately before the water level in the water channel 5 drops to the flushing water level HHWL or at the time when the water level drops to the flushing water level HHWL, the interference pressing of the float bar 31 by the lower end of the restraining member 11F in the standing water stopping state restraining means 11 is released. 30 rises to the upper limit position shown by the two-dot chain line in FIGS. 1 and 5, and the valve body 2 is allowed to fall in the same manner as described above, and the valve body 2 falls.
[0036]
Thus, the flash gate 1 according to the present invention has a simple structure in which the hoisting device 53 necessary for the conventional flash gate described with reference to FIG. When the flushing water level rises to HHWL, the flushing can be performed by automatically and surely turning over the valve body 2 so as not to be in the way, and after flushing, the valve body 2 is automatically and promptly moved. It can be raised and returned to standby for the next flush cleaning. In addition, when the water level of the water channel 5 suddenly rises to a level exceeding the flush execution water level HHWL at a design value, not only can the provision of a temporary water storage function be performed to protect the downstream area, but also the power supply equipment can be used. Since installation can be performed in an undeveloped place, restrictions on the installation place can be eased.
[0037]
On the other hand, as shown in FIG. 7, by providing the regulating means 9 including a pair of left and right side plates 9A, 9A attached to the gate columns 7A, 7A on both sides in the width direction of the gate portion 7, the valve body 2 is provided with the above-described standing water stoppage. In the process of falling from the state, the lateral leakage of water from both sides in the water channel width direction of the valve body 2 is regulated, so that the flushing power is increased and the flushing effect can be enhanced. The restricting means 9 is not limited to the pair of left and right side plates 9A, 9A attached to the gate posts 7A, 7A, and depending on the shape of the gate posts 7A, 7A, as shown in FIG. It may be constituted by a pair of left and right side plates 9A, 9A. Further, instead of the pair of left and right side plates 9A, 9A, a regulating means 9 composed of a bellows that expands and contracts following the standing and falling of the valve body 2 may be provided. By manufacturing the regulating means 9 from a copper plate or a silver plate, the antibacterial action of copper ions or silver ions is exerted, and the inconvenience of forming a biofilm on the surface of the regulating means 9 is avoided. Generation can be suppressed.
[0038]
As shown in FIGS. 9, 10 and 11, the standing water stopping / holding means 3 is constituted by an engagement / disengagement mechanism 32, which is a component on the gate 7 side, and a component on the valve body 2 side. You may comprise with the engagement hole 33. In FIG. 9, the same portions as those in FIGS. 5A and 5B are denoted by the same reference numerals, and the description of the overlapping structure and operation will be omitted. The engagement / disengagement mechanism 32 shown in FIG. 9 includes one gate 7A of the gate portion 7 configured so that water in the water channel 5 can be introduced and discharged therein, and a float 32N that is vertically movably inserted into the inside of the gate 7A. The base is pivotally attached to the gate post 7A, the inner end faces the upper side of the float 32N inside the gate post 7A, the outer end faces the outside of the gate post 7A, and the lower end has the lever 32O. A vertically extending rod 32Q pivotally attached to the outer end of 32O and an upper end pivotally attached to the side surface of the disk 32P, and is rotatably disposed at the front side of the upper end transverse portion 7C of the gate portion 7. A rotating shaft 32R having a disk 32P attached to one end thereof so as to be simultaneously rotatable, and a pair of rotating arms 32S, 32S attached to the horizontal rotating shaft 32R so as to be simultaneously rotatable. 32S, 32S The upper end of the rod 32T is pivotally mounted, and the lower end of the connecting rod 32T is pivotally connected to a vertically movable case 34 which houses and holds a lock claw 32D having a vertical axis and projecting downward. The pair of engagement holes 33, 33, which are components on the valve body 2 side, have a vertical axis on the ceiling 24 of the valve body 2 and are provided corresponding to the lock claws 32D. is there. The up-and-down water stopping / holding / releasing means 3 having the engagement / disengagement mechanism 32 as a component on the gate portion 7 side having such a structure and a pair of engagement holes 33, 33 as components on the valve body 2 side. Even in this case, the same operation and effect as the standing water stopping state holding / releasing means 3 described in the first embodiment can be obtained.
[0039]
In addition, a float 11D, which is a component of the standing water stopping state restraining means 11, is loaded movably up and down, facing the upper part of the lever 32O in one of the gate posts 7A. The lower end of the restricting member 11F is arranged above the lever 32O so as to face the upper side of the lever 32O, and the water level of the water channel 5 rapidly rises to a level exceeding the flush execution water level HWL at a speed exceeding the design value. At this time, the restricting member 11F may interfere with the lever 32O to restrict the valve body 2 in the standing water stop state.
[0040]
That is, in the standing water stopping state holding / releasing means 3 in FIG. 9, the water level in the waterway 5 gradually rises to the flushing water level HHWL at a speed equal to or lower than the design value, so that the water level in one of the gate columns 7A reaches the same level. When the float 32N rises and floats, the disk 32P, the horizontal rotation shaft 32R, and the pair of rotation arms 32S, 32S are rotated counterclockwise in FIGS. 13 and 11 (c) via the lever 32O and the rod 32Q. By rotating the case 34 and 34 to pull it up, the lock claw portion 32D is retracted from the engagement hole 33 provided in the ceiling 24 of the valve body 2, and the valve body 2 releases the standing water stopping state holding action. , The valve body 2 can be allowed to fall. Further, the tapered surface 32d of the lock claw portion 32D interferes with the ceiling 24 of the valve element 2 just before the valve element 2 returns to the standing water stop state, and is pressed into the case 34 against the bias of the spring 3S. When the valve body 2 returns to the standing water stopping state, the lock claw portion 32D reaches the position of the engagement hole 33 and projects from the cases 34, 34 by the bias of the spring 3S. By engaging with the holes 33, 33, the valve body 2 can be kept in the standing and stopped state, and can be put on standby for the next flush cleaning.
[0041]
On the other hand, even if the water level of the water channel 5 suddenly rises to a level exceeding the flushing water level HWL at a speed exceeding the design value, the float 32N is still in full flood due to the braking action of the engagement / disengagement mechanism 32 when the maximum buoyancy is generated. Even if maximum buoyancy occurs due to the whole being submerged at the lower limit position, even if the maximum buoyancy is generated, the levitation follows the water surface that gradually rises at a speed less than the design value or has a slight delay as described above. Therefore, the water level of the water channel 5 rises to a region exceeding the flush execution water level HHWL prior to the float 32N rising to the upper limit position, and inside one of the pillars 7A, The water level (water level) rises to an area higher than the standing water stopping state holding / releasing means 3 in which the standing water stopping state restraining means 11 is arranged. As a result, the float 11D rises to the upper limit position, lowers the restraining member 11F via the lever 11G, causes the lower end of the restraining member 11F to interfere with the lever 32O, and presses this from above, so that the float 30N is pressed. Prevents climbing to the upper limit position. Thus, by constraining the valve body 2 in the standing water stop state, a water storage function is exhibited to prevent flash flood from flowing down to the downstream area at a stretch, thereby protecting the downstream area.
[0042]
When the water level of the water channel 5 further rises and exceeds the top of the valve body 2, only the amount of water exceeding the top flows down to the downstream area as overflow water, and the water level of the water channel 5 is equivalent to the top of the valve body 2. Stabilizes at the level. In this manner, the water level of the water channel 5 is stable at a level equal to or lower than the level corresponding to the top of the valve body 2, specifically, the water level of the water channel 5 is lower than the level of the top of the valve body 2 and higher than the flush execution water level HHWL. In a stable state within the range, drainage is performed from the drainage passage 12 for lowering the water level to the downstream region, and the water level in the waterway 5 can be lowered. In this embodiment, a drainage passage 12 for lowering the water level may be provided in one of the gate columns 7A.
[0043]
Further, in each of the above-described embodiments, a spring force adjusting means (not shown) capable of adjusting the spring force of the helical springs 40, 40, which is a component of the standing water stopping state returning means 4, is provided. Since the spring forces of the helical springs 40, 40 can be adjusted, the upright valve body 2 is automatically and surely turned over to perform flush cleaning, and the valve body 2 is quickly raised and returned after flush flushing. The operation to be performed can be easily adjusted at the installation site of the flash gate 1.
[0044]
【The invention's effect】
As described above, since the flash gate of the present invention is configured, the following effects can be obtained.
[0045]
According to the first aspect of the present invention, when the water level of the water channel rises to a predetermined flash execution water level at a speed equal to or lower than a design value, the standing up is performed by a simple structure in which a hoisting device necessary for a conventional flash gate is omitted. The flushing can be performed by automatically and surely turning over the valve body being flushed, and after flush flushing, the valve body is automatically and quickly raised and returned to standby for the next flush flushing. be able to. In addition, when the water level in the canal suddenly rises to a level exceeding the flushing water level at a design value, not only can the water storage function be tentatively used to protect the downstream area, but also the power supply facilities are installed. Since installation in a place where it is not possible becomes possible, restrictions on the installation location can be eased.
[0046]
According to the second aspect of the present invention, the urging force of the spring, which gradually decreases as the valve element returns from the overturned state to the standing water stop state, is supplemented by the movement of the moving weight, and the valve element is quickly raised. It is possible to return to the water stop state and to reliably close the water channel.
[0047]
According to the invention as set forth in claim 3, in the process of the valve body falling from the standing water stopping state, side leakage of water from both sides in the water channel width direction of the valve body is regulated, and the water force of flush cleaning is increased, Flash cleaning effect can be improved.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of the present invention.
FIG. 2 is a left side view of FIG.
FIG. 3 is a plan view of FIG. 1;
FIG. 4 is an enlarged vertical sectional side view of the valve body taken along line AA of FIG. 1;
FIG. 5 is a configuration diagram illustrating an example of a standing water stopping state holding / releasing means.
FIG. 6 is an operation explanatory view of a standing water stopping state holding / releasing means.
FIG. 7 is a perspective view showing an example of a regulating unit.
FIG. 8 is a perspective view showing another example of the regulating means.
FIG. 9 is a perspective view showing another embodiment of the present invention.
FIG. 10 is a side view showing a state where the valve body of FIG. 9 is closed.
FIG. 11 is an enlarged side view showing a locked state of the valve body of FIG. 9;
FIG. 12 is a longitudinal sectional side view of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Flush gate 2 Valve body 3 Standing water stopping state holding / releasing means 4 Standing water stopping state returning means 5 Water channel 7 Gate section 9 Regulation means 11 Standing water stopping state restraining means 12 Drainage passage for lowering water level 20 Hollow part of valve body 21 Valve body base 40 Spring 41 Moving weight HHWL Flush execution water level

Claims

The base is pivotally attached to the bottom of the waterway so as to be able to stand upright and fall over, so that the waterway can be closed and opened, and the water in the waterway flows in the standing water stop state and in the process of overturning, and the water flows in the overturned state. A valve body having a hollow portion through which water is discharged,
Until the water level of the water channel rises to the flush execution water level, the valve body is closed against the pressing force of the water in the standing water stop state against the pressing force of the water, and the water channel is closed at a speed below the design value. When rising to the flush execution water level, the standing water stopping state is released, and the standing water stopping state holding / releasing means for allowing the valve body to tilt in the falling direction by the pressing force of the water,
When the water level suddenly rises to a level exceeding the flushing water level at a speed exceeding the design value, the standing water stopping state restraining means for interfering with the standing water stopping state holding / releasing means and restraining the valve body in the standing water stopping state. When,
A water level lower than the flush execution water level is lowered to the flush execution water level to release the restraint of the valve body in the standing water stop state, and the valve body is allowed to tilt in the overturning direction due to the pressing force of the water. Drainage passages,
An upright water stopping state returning means for erecting the valve body that has been overturned to open the waterway and closes the waterway,
The standing water stopping state holding / releasing means is provided separately in a gate portion where the valve body and the valve body come and go,
The standing water stopping state return means and the standing water stopping state restraining means are provided on the valve body,
A flash gate, wherein the valve body is configured such that the overturning acceleration force generated in the valve body due to the start of tilting of the valve body in the overturning direction overcomes the standing water stop state returning means and causes the valve body to overturn.

The rising and stopping water state returning means increases a restoring force as a spring that constantly urges the valve body in the rising direction and a valve body that has fallen returns to the standing and stopped water state by the bias of the spring. The flash gate according to claim 1, further comprising: a moving weight that moves in a direction in which the flash gate is moved.

3. The flash gate according to claim 1, further comprising a regulating unit configured to regulate lateral leakage of water from both sides of the valve body in the width direction of the water when the valve body falls from the standing water stop state. 4. .