JP2005016044A - Flow-down rainwater filtration apparatus and rainwater storage apparatus using the same - Google Patents

Flow-down rainwater filtration apparatus and rainwater storage apparatus using the same Download PDF

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JP2005016044A
JP2005016044A JP2003179023A JP2003179023A JP2005016044A JP 2005016044 A JP2005016044 A JP 2005016044A JP 2003179023 A JP2003179023 A JP 2003179023A JP 2003179023 A JP2003179023 A JP 2003179023A JP 2005016044 A JP2005016044 A JP 2005016044A
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rainwater
pipe
vertical pipe
valve
opening
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Seiichiro Takai
征一郎 高井
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TOOTETSU KK
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TOOTETSU KK
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/108Rainwater harvesting

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a filtration apparatus in a comparatively low place lower than the full water surface of a storage tank. <P>SOLUTION: The filtration apparatus 20 provided at a rainwater inflow pipe 12 for supplying rainwater to the rainwater storage tank 11 is provided with a vertical pipe 21 positioned lower than the full water surface of the storage tank 11 to constitute a vertical part of the rainwater inflow pipe 12 or vertically connected to the lower end of the rainwater inflow pipe 12 and having an opening 21a at the side; a valve chamber 22 communicating with the vertical pipe 21 through the opening 21a and mounted in a watertight manner to the vertical pipe 21 to cover the opening 21a and having a valve element 27 inside; and a strainer 26 detachably mounted into the vertical pipe 21 facing the opening 21a of the vertical pipe 21. In the state of the water level in the vertical part being higher than the opening 21a, the valve element 27 closes the valve chamber 22, and in the state of the water level in the vertical part being lower than the opening 21a, the strainer 26 can be taken out of the valve chamber 22 through the opening 21a. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、建物の屋根又は屋上に落下して流下する雨水に混入する異物を除去する流下雨水の濾過装置及びこれを用いた雨水貯留装置に関するものである。
【0002】
【従来の技術】
従来、雨水から砂や微細な塵埃を除去してこれを貯留し、有効利用することが行われている。そして雨水から砂や塵埃を除去する雨水の濾過装置が提案されている(例えば、特許文献1参照。)。この濾過装置は、外管とこの外管の中に設けられる内管とからなり、この外管には鉛直部が形成され、外管の上端は雨樋に接続される。外管の下端は下水道管渠に連通する集水桝に接続される。内管の上端の外周縁は上記鉛直部の内周面と所定の間隔をおいて配置される。内管の下端は雨水の貯留槽に接続される。外管の鉛直部の一部の内径が連続的に変化して形成され、内管の上部の位置を上下方向に移動して上記所定の間隔を調整可能に構成される。内管の上端近傍の外管には開口部が設けられ、この開口部には開口部を開閉可能な蓋が設けられる。
【0003】
この濾過装置では、雨樋から流下する雨水は外管の鉛直部の内周面に付着したまま層状に流下する。降雨強度(mm/時)が下水道管渠及び河川の流下能力を越えない中小規模の降雨時には、鉛直部の内周面上を流下する雨水の層の厚みは内筒上端の外周縁と鉛直部の内周面との間隔より小さいため、外管のみに流下し集水桝を経由して下水道管渠に流れ、内管には流れない。
降雨強度が下水道管渠等の流下能力を越える大規模の降雨時には、鉛直部の内周面上を流下する雨水の層の厚みは上記間隔より大きくなるため、内管にも雨水が流下して雨水貯留槽に流入する。この結果、下水道管渠や河川の流下能力を越える降雨強度の時に限り雨樋からの雨水を貯留槽に分流でき、簡単な構造で既存の雨樋の僅かなスペースに設置でき、かつ雨樋から入込む砂や微細な塵埃を除去して貯留槽に雨水を導くようになっている。
【0004】
【特許文献1】
特開昭64−83738号公報
【0005】
【発明が解決しようとする課題】
しかし、上述した従来の雨水濾過装置を用いて分流された雨水を貯留槽に貯留する場合には、その濾過装置を貯留槽の満水面より上方に設けなければ分流された雨水が自重により貯留槽まで達しないので、その濾過装置は比較的高所に取付けなければならない不具合があった。そして濾過装置を高所に取付けると、その濾過装置の点検は脚立等の台を用いて行うことを必要とし、日常点検が比較的困難になる問題点があった。
本発明の目的は、貯留槽の満水面より下方の比較的低所に設置し得る流下雨水の濾過装置及びこれを用いた雨水貯留装置を提供することにある。
【0006】
【課題を解決するための手段】
請求項1に係る発明は、雨水貯留槽11に雨水を供給するための雨水流入管12に設けられる流下雨水の濾過装置20の改良である。
その特徴ある構成は、貯留槽11の満水面より下方に位置し雨水流入管12の鉛直部を構成するか又は雨水流入管12の下端に鉛直方向に接続され側部に開口部21aを有する鉛直管21と、鉛直管21に開口部21aを介して連通し開口部21aを覆うように鉛直管21に水密に取付けられかつ内部に弁体27を有するバルブ室22と、鉛直管21の開口部21aを臨む鉛直管21の内部に取外し可能に取付けられたストレーナ26とを備え、鉛直部内の水位が開口部21aを上回る状態で弁体27がバルブ室22を密閉しかつ鉛直部内の水位が開口部21aを下回る状態で開口部21aを介してストレーナ26をバルブ室22から取出し可能に構成されたところにある。
【0007】
この請求項1に係る流下雨水の濾過装置では、鉛直部内の水位が開口部21aを上回る状態で弁体27がバルブ室22を密閉するように構成したので、バルブ室22を貯留槽11の雨水取入口11aより下方に位置させても、雨水がバルブ室22から漏れ出すことはなく、その雨水を貯留槽11に流入させることができる。一方、ストレーナ26には異物が堆積するけれども、開口部21aを介してストレーナ26をバルブ室22から取出し可能に構成するので、バルブ室22を比較的低所の点検作業が容易な位置に設けることにより、そのストレーナの点検が容易になる。
【0008】
請求項2に係る発明は、請求項1に係る発明であって、弁体がボール弁27であって、ボール弁27の円孔付き弁座28が鉛直管21の開口部21aより上方のバルブ室22の内部を略水平に仕切るようにバルブ室22に設けられた流下雨水の濾過装置である。
この請求項2に係る流下雨水の濾過装置では、鉛直部内の水位が開口部21aを上回る状態でボール弁27が弁座28に当接するので、バルブ室22を確実に密閉させることができる。
請求項3に係る発明は、請求項1又は2に係る発明であって、開口部21a下端に相当する鉛直管21の内部に略水平にリング23が設けられ、ストレーナ26がリング23の中央孔23bを塞ぐように取付けられた流下雨水の濾過装置である。
この請求項3に係る流下雨水の濾過装置では、中央孔23bを介してリング23より下方の鉛直管21に流入する雨水に混入する異物をストレーナ26により除去することができる。
【0009】
請求項4に係る発明は、請求項1ないし3いずれか1項に係る発明であって、リング23の内周縁に突起23aが形成され、突起23aと鉛直管21の周面との間に鉛直管21の内周面に沿って流下する雨水を受けかつ受けた雨水をバルブ室22内に導くようにリング状の凹溝が形成され、バルブ室22の底部にバルブ室22に流入した雨水を排出する排水バルブ24が設けられた流下雨水の濾過装置である。
この請求項4に係る流下雨水の濾過装置では、雨が降り始めた際の初期雨水を凹溝で受けてバルブ室22を介して排水バルブ24から外部に排出させることができる。ここで、初期雨水には比較的多くの塵埃が含まれているため、その多くの塵埃がストレーナ26に捕捉されることを防止して、ストレーナ26の点検頻度を減少させることができる。
【0010】
請求項5に係る発明は、請求項4に係る発明であって、リング23の内周縁に形成された突起23aに有底円筒状のストレーナ26の周縁部26aが係止する流下雨水の濾過装置である。
この請求項5に係る流下雨水の濾過装置では、ストレーナ26を上方に持ち上げるだけの比較的簡単な作業でリング23から取外すことができ、その点検作業を比較的容易にすることができる。
請求項6に係る発明は、請求項1ないし5いずれか1項に記載された濾過装置20と、濾過装置20の鉛直管21の下端より上方に雨水取入口11aを有する雨水貯留槽11aと、鉛直管21の下端に一端が接続され他端が雨水取入口11aに接続された雨水案内管16とを備え、鉛直管21の上端が雨水取入口11aより上方に位置するように構成された雨水貯留装置である。
この請求項6に係る雨水貯留装置では、濾過装置20で濾過されて鉛直管21及び雨水案内管16の各内部に溜まった雨水は、その水位が上昇して雨水取入口11aに達することによりその取入口11aから貯留槽11の内部に流入して貯留され、必要に応じて取出すことにより利用することができる。
【0011】
請求項7に係る発明は、請求項6に係る発明であって、鉛直管21及び雨水案内管16の各内部に存在する雨水を外部に排出可能なドレンバルブ32が鉛直管21又は雨水案内管16に設けられた雨水貯留装置である。
濾過装置20のストレーナ26の濾過作用及び塵埃がバルブ室22に誘導されることにより大半の塵埃は除去されるものの、長期的にこの装置を使用すると、ストレーナ26をわずかながら通過した異物が沈降して鉛直管21及び雨水案内管16の各内部に沈殿するおそれがある。このため、鉛直管21及び雨水案内管16の各内部は所定期間毎に洗浄する必要がある。この請求項7に係る雨水貯留装置では、ドレンバルブ32を開放することにより鉛直管21及び雨水案内管16の各内部に水を流通させることができ、この内部に水を流通させることにより、鉛直管21及び雨水案内管16の各内部に沈殿した異物を外部に容易に排出させることができる。
【0012】
請求項8に係る発明は、請求項6又は7に係る発明であって、鉛直管21の下端又は雨水案内管16に雨水案内管16から鉛直管21に向かう雨水流を防止するように構成された逆流防止弁31が設けられた雨水貯留装置である。
この請求項8に係る雨水貯留装置では、鉛直管21内部の水がなくなったとしても、雨水案内管16から鉛直管21に雨水が逆流しないので、雨水取入口11aを雨水貯留槽11の低位置、例えば底の近くに取付けることが可能になり、その雨水取入口11aに他端が接続されて地表に表出する雨水案内管16を短くして装置全体の美感を向上させることができる。
【0013】
【発明の実施の形態】
次に本発明の実施の形態を図面に基づいて詳しく説明する。
図6に示すように、本発明の雨水貯留装置10は、雨水を貯留するための雨水貯留槽11と、その雨水貯留槽11に雨水を供給するための雨水流入管12と、その雨水流入管12に設けられた流下雨水の濾過装置20とを備える。図における雨水流入管12は家屋13の屋根13aの縁に設けられた雨樋14に上端が接続された筒状物であり、家屋13の屋根13aに落ちた雨が雨樋14に流入して集められ、集められた雨水は雨樋14から雨水流入管12に進入してその雨水流入管12の内部を流下するように構成される。濾過装置20は雨水流入管12に設けられ、濾過装置20と貯留槽11とは雨水案内管16により接続される。
【0014】
図1〜図3に示すように、濾過装置20は鉛直管21とバルブ室22とにより構成される。この実施の形態における鉛直管21は雨水流入管12の下端に上端が接続され(図6)、貯留槽11の満水面より下方の鉛直管21の側部には開口部21aが形成される。開口部21aの下端に相当する鉛直管21の内部には略水平にリング23が設けられる。そのリング23の内周縁には突起23aが上方に向けて形成され、突起23aと鉛直管21の周面との間に鉛直管21の内周面に沿って流下する雨水を受けるリング状の凹溝が形成される。
【0015】
リング23中央の中央孔23bには、その中央孔23bを塞ぐようにストレーナ26が取付けられる。この実施の形態におけるストレーナ26は金網を有底円筒状に成形したものであって、開口部21aはそのストレーナ26が通過可能な大きさに形成される。有底円筒状のストレーナ26の外径はリング23の内周縁に形成された突起23aの内系よりわずかに小さくなるように形成され、ストレーナ26の開口部周縁には突起23aの上端に載置可能なフランジ26aが形成され、そのフランジからなる周縁部26aが突起23aに係止するように構成される。そしてこのストレーナ26は、有底筒部をリング23の中央孔23bに挿入することにより、鉛直管21の開口部21aを臨む鉛直管21の内部に取外し可能に取付けられる。
一方、バルブ室22はその開口部21aを覆うように鉛直管21に水密に取付けられ、その鉛直管21に開口部21aを介して連通するように構成される。そして開口部21aの下端に相当する鉛直管21の内部に凹溝を形成するリング23が設けられ、リング状の凹溝は受けた雨水をバルブ室22内に導くように形成される。そしてバルブ室22の底部にはバルブ室22に流入した雨水を排出する排水バルブ24が設けられる。
【0016】
図4及び図5に示すように、排水バルブ24は、筒体24aとその筒体24aの中央孔24bを遮断してかつ回転可能に設けられた回転弁24cとを備える。回転弁24cには中央孔24bと同一の孔径の大径孔24dと、その大径孔24dより小径であってかつその大径孔24dに直交する小径孔24eとが形成される。そして排水バルブ24の中央孔24bの上部は金網25で覆われる。この排水バルブ24は、回転弁24cを回転させて図4に示すように小径孔24eの軸心を中央孔24bの軸心に合致させることによりバルブ室22に流入した雨水を僅かながら外部に排出させてその雨水をバルブ室22に比較的長時間に渡って貯留させるとともに、回転弁24cを回転させて図5に示すように大径孔24dの軸心を中央孔24bの軸心に合致させることにより、バルブ室22内部の雨水をこの中央孔24b及び大径孔24dを介して比較的速やかに外部に排出可能に構成される。
【0017】
図1〜図3に戻って、バルブ室22の内部には弁体27が設けられる。この実施の形態における弁体27は比重が1未満のボールからなる弁27であって、このボール弁27の円孔28a付き弁座28が鉛直管21の開口部21aより上方のバルブ室22の内部を略水平に仕切るようにバルブ室22に設けられる。円孔28aの孔縁にはリング状のパッキン29が嵌着され、鉛直部内の水位が開口部21aを上回る状態で弁体27はその浮力により上昇して弁座28に当接してバルブ室22を密閉するように構成される。
【0018】
一方、円孔28aはストレーナ26が挿通可能な大きさに形成され、弁座28上方のバルブ室22にはこの弁座28を覆うように蓋板22aが取外し可能に設けられる。そして、雨が止んでいる状態ではバルブ室22内部の雨水が排水バルブ24から外部に排出されることにより、ボール弁27が図1の実線で示すように弁座28から離れてバルブ室22の内部で下降し、円孔28aを開放させる。従って、バルブ室22から蓋板22aを取外して弁座28を出現させると、円孔28a及び開口部21aを介してストレーナ26をバルブ室22から取出し可能に構成される。
【0019】
図6に示すように、雨水貯留槽11の上部側壁には雨水取入口11aが形成され、その雨水取入口11aは濾過装置20の鉛直管21の下端より上方に形成される。鉛直管21の上端は雨水取入口11aより上方に位置するように構成される。また、鉛直管21の下端には雨水案内管16の一端が接続され、雨水案内管16の他端は雨水取入口11aに接続される。従って、鉛直管21及び雨水案内管16の各内部に雨水が溜まる事態が生じうるため、この鉛直管21及び雨水案内管16の各内部に存在する雨水を外部に排出可能なドレンバルブ32が鉛直管21の下端に設けられる。
【0020】
次にこのように構成された雨水貯留装置の動作を説明する。
雨が家屋13の屋根13aに降ると、雨はその屋根13aの傾斜に沿って流れて雨樋14に流入して集められる。集められた雨水は雨樋14から雨水流入管12に進入してその雨水流入管12の内部を流下し、濾過装置20の鉛直管21に達する。雨が降り始めた際の初期雨水は、その大部分が鉛直管21の途中に設けられたリング23の内周縁に形成された突起23aと鉛直管21の周面との間に形成された凹溝により受けられ、バルブ室22の内部に導かれる。ここで、初期雨水には比較的多くの塵埃が含まれているため、その多くの塵埃がストレーナ26に捕捉されることを防止して、ストレーナ26の点検頻度を減少させることができる。
【0021】
ここで、排水バルブ24における回転弁24cの小径孔24eを中央孔24bの軸心に合致させておけば、雨が降り続いて雨水流入管12の内部を流下する雨水の量は排水バルブ24から外部に排出される量を超えて増加する。すると、バルブ室22の内部に雨水が溜まり始め、バルブ室22の水位がリング23中央に設けられた突起23aの上端を越えると中央孔23bを介して雨水がリング23より下方の鉛直管21に流入する。ここで、中央孔23bにはその中央孔23bを塞ぐようにストレーナ26が取付けられているので、中央孔23bを介してリング23より下方の鉛直管21に流入する雨水は、このストレーナ26により混入する異物が除去される。
【0022】
ここで、雨水貯留槽11は雨水取入口11aが濾過装置20の鉛直管21の下端より上方に形成されるため、リング23を通過した雨水は鉛直管21及び雨水案内管16の各内部に溜まる。そして、鉛直管21及び雨水案内管16の各内部に溜まった雨水の水位が上昇して雨水取入口11aに達して時点で雨水がその取入口11aから貯留槽11の内部に流入して貯留される。貯留槽11に貯留された雨水は蛇口11bから必要に応じて取出して散水や洗車用水等として利用することができる。ここで、鉛直管21の上端は雨水取入口11aより上方に位置するので、雨水が貯留槽に流入せずに鉛直管21の上端から外部に排出されるような事態は回避される。
【0023】
一方、雨水流入管12の内部を流下する雨水の量が増加すると、バルブ室22の内部に雨水が溜まってその水位が上昇し、バルブ室22の内部で弁体27が浮上する。バルブ室22の水位が上昇するとボール弁27はその浮力により上昇して弁座28に当接してバルブ室22を密閉する。従って、バルブ室22を貯留槽11の雨水取入口11aより下方に位置させても、雨水が貯留槽に流入せずにこのバルブ室22における弁座27の円孔27aから外部に排出されるような事態は回避される。
【0024】
ここで、濾過装置20のストレーナ26には除去した異物が堆積する。このため、所定期間毎にこのストレーナを取出して洗浄する必要がある。このストレーナの取出しに際しては、雨の降っていないときにバルブ室22から蓋板22aを取外して弁座28を出現させる。そして、ボール弁27が図1の実線で示すように弁座28から離れてバルブ室22の内部で下降し、円孔28aが開放されていたならば、この円孔28a及び開口部21aを介してストレーナ26をバルブ室22から取出す。一方、雨の降った直後であって、蓋板22aを取外した段階でボール弁27が円孔28aを塞いでいたならば、排水バルブ24の回転弁24cを回転させて図5に示すように大径孔24dの軸心を中央孔24bの軸心に合致させる。そして、バルブ室22内部の雨水を速やかに外部に排出させて円孔28aを開放させ、この円孔28a及び開口部21aを介してストレーナ26をバルブ室22から取出す。ここで、有底円筒状のストレーナ26の外径はリング23の内周縁に形成された突起23aの内系よりわずかに小さくなるように形成され、ストレーナ26の開口部周縁には突起23aの上端に載置可能なフランジが形成されるため、ストレーナ26は有底筒部を中央孔23bから離脱するように上方に持ち上げることによりそのリング23から取外すことができる。
【0025】
なお、上述した実施の形態では、上部側壁に雨水取入口11aが形成された雨水貯留槽11を用いた雨水貯留装置を説明したが、図7に示すように、雨水取入口11aは雨水貯留槽11の下部側壁に形成してもよい。但し、図7に示すような場合には雨水貯留槽11の内部における雨水の水位が鉛直管21の開口部21aより高い時には、雨水が雨水取入口11aから雨水案内管16に逆流することになる。これを防止するために、鉛直管21の下端又は雨水案内管16に雨水案内管16から鉛直管21に向かう雨水流を防止するように構成された逆流防止弁31を設ける。図7に示す逆流防止弁31は中央に丸孔31bが形成された弁座31aと、弁座31aより下方に設けられ丸孔31bを封止可能なボール弁31cとを備え、ボール弁31cが丸孔31bを封止することにより雨水案内管16から鉛直管21に向かう雨水流を防止するように構成される。このように逆流防止弁31を設ければ、鉛直管21内部の水がなくなったとしても、雨水案内管16から鉛直管21に雨水が逆流しないので、雨水取入口11aを雨水貯留槽11の低位置、例えば底の近くに取付けることが可能になる。そして雨水取入口11aを雨水貯留槽11の低位置にすれば、その雨水取入口11aに他端が接続されて地表に表出する雨水案内管16を短くすることができ、この雨水案内管16が比較的長く視認されることを防止して装置全体の美感を向上させることができる。
【0026】
また、上述した実施の形態では、雨水流入管12の下端に鉛直管21が鉛直方向に接続された場合を説明したが、鉛直管21が雨水流入管12の鉛直部を成するようにしても良い。鉛直管21が雨水流入管12の鉛直部を構成するようにすれば、雨水流入管12を鉛直管21が兼ねるようになり、独立した雨水流入管12をなくして部品点数を減少させることができる。
更に、上述した実施の形態では、弁体がボール弁27である場合を説明したが、弁体はフラップ弁等であっても良い。
【0027】
【発明の効果】
以上述べたように、本発明によれば、濾過装置が鉛直管とバルブ室と鉛直管の開口部を臨む鉛直管の内部に取外し可能に取付けられたストレーナとを備え、水位が開口部を上回る状態で弁体がバルブ室を密閉可能に構成したので、バルブ室を貯留槽の雨水取入口より下方に位置させても、雨水がバルブ室から漏れ出すことはなく、その雨水を貯留槽に流入させることができる。一方、ストレーナには異物が堆積するけれども、開口部を介してストレーナをバルブ室から取出し可能に構成するので、バルブ室を比較的低所の点検作業が容易な位置に設けることにより、そのストレーナの点検を容易に行うことができる。この場合、弁体がボール弁であって、弁座を鉛直管の開口部より上方のバルブ室の内部を略水平に仕切るようにバルブ室に設ければ、バルブ室を確実に密閉することができ、リングの中央孔を塞ぐようにストレーナを取付ければ、雨水に混入する異物をそのストレーナにより除去することができる。
【0028】
また、このような濾過装置と、濾過装置の鉛直管の下端より上方に雨水取入口を有する雨水貯留槽と、鉛直管の下端に一端が接続され他端が雨水取入口に接続された雨水案内管とを備え、鉛直管の上端が雨水取入口より上方に位置するように構成された雨水貯留装置では、濾過装置で濾過されて鉛直管及び雨水案内管の各内部に溜まった雨水は、その水位が上昇して雨水取入口に達することによりその取入口から貯留槽の内部に流入して貯留され、必要に応じて取出すことにより利用することができる。
【図面の簡単な説明】
【図1】本発明の濾過装置を示す図3のA−A線断面図。
【図2】その濾過装置の開口部の形状を示す図3に示すB−B線断面図。
【図3】図6に示す雨水貯留装置に用いられた濾過装置のC−C線断面図。
【図4】小径孔が中央孔の軸心に合致する排水バルブを示す図1のD−D線断面図。
【図5】大径孔が中央孔の軸心に合致する排水バルブを示す図4に対応する断面図。
【図6】その濾過装置を用いた雨水貯留装置の構成図。
【図7】その濾過装置を用いた別の雨水貯留装置の構成図。
【符号の説明】
10 雨水貯留装置
11 雨水貯留槽
11a 雨水取入口
12 雨水流入管
16 雨水案内管
20 濾過装置
21 鉛直管
21a 開口部
22 バルブ室
23 リング
23a 突起
23b 円孔
24 排水バルブ
26 ストレーナ
26a 周縁部
27 ボール弁(弁体)
28 弁座
31 逆流防止弁
32 ドレンバルブ
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a falling rainwater filtering device for removing foreign matters mixed in rainwater falling on the roof or roof of a building and a rainwater storage device using the same.
[0002]
[Prior art]
Conventionally, sand and fine dust are removed from rainwater, stored, and effectively used. And the rainwater filtration apparatus which removes sand and dust from rainwater is proposed (for example, refer to patent documents 1). This filtration device is composed of an outer tube and an inner tube provided in the outer tube. A vertical portion is formed in the outer tube, and the upper end of the outer tube is connected to a gutter. The lower end of the outer pipe is connected to a water collection tank communicating with the sewer pipe. The outer peripheral edge at the upper end of the inner tube is disposed at a predetermined interval from the inner peripheral surface of the vertical portion. The lower end of the inner pipe is connected to a rainwater storage tank. An inner diameter of a part of the vertical portion of the outer tube is continuously changed, and the position of the upper portion of the inner tube is moved in the vertical direction so that the predetermined interval can be adjusted. An opening is provided in the outer tube near the upper end of the inner tube, and a lid capable of opening and closing the opening is provided in this opening.
[0003]
In this filtering device, rainwater flowing down from the rain gutter flows down in layers while adhering to the inner peripheral surface of the vertical portion of the outer pipe. When the rainfall intensity (mm / h) does not exceed the sewer pipe and river flow capacity, the thickness of the rainwater flowing down on the inner surface of the vertical section is the outer peripheral edge of the inner cylinder and the vertical section. Since it is smaller than the distance from the inner peripheral surface of the pipe, it flows down only to the outer pipe, flows to the sewer pipe through the drainage pipe, and does not flow to the inner pipe.
During a large-scale rainfall where the rainfall intensity exceeds the flow capacity of sewer pipes, etc., the thickness of the rainwater layer flowing down on the inner peripheral surface of the vertical section will be larger than the above interval, so rainwater will also flow down the inner pipe. It flows into the rainwater storage tank. As a result, rainwater from the rain gutter can be diverted to the storage tank only when the rainfall intensity exceeds the sewer pipe and river flow capacity, and it can be installed in a small space of the existing gutter with a simple structure. It removes sand and fine dust that enters, and guides rainwater into the storage tank.
[0004]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 64-83738
[Problems to be solved by the invention]
However, when rainwater diverted using the conventional rainwater filtration device described above is stored in a storage tank, if the filtration device is not provided above the full water surface of the storage tank, the diverted rainwater is stored by its own weight. Therefore, there is a problem that the filtering device has to be installed at a relatively high place. When the filtration device is mounted at a high place, the filtration device needs to be inspected using a platform such as a stepladder, and daily inspection is relatively difficult.
An object of the present invention is to provide a falling rainwater filtration device that can be installed at a relatively low place below the full water surface of a storage tank, and a rainwater storage device using the same.
[0006]
[Means for Solving the Problems]
The invention according to claim 1 is an improvement of the falling rainwater filtration device 20 provided in the rainwater inflow pipe 12 for supplying rainwater to the rainwater storage tank 11.
The characteristic structure is located below the full water surface of the storage tank 11 and constitutes the vertical part of the rainwater inflow pipe 12 or is vertically connected to the lower end of the rainwater inflow pipe 12 in the vertical direction and has an opening 21a on the side. A pipe chamber 21, a valve chamber 22 communicating with the vertical pipe 21 through the opening 21 a and watertightly attached to the vertical pipe 21 so as to cover the opening 21 a, and having a valve body 27 therein, and an opening of the vertical pipe 21 And a strainer 26 that is detachably attached to the inside of the vertical pipe 21 that faces 21a, and the valve body 27 seals the valve chamber 22 in a state where the water level in the vertical part exceeds the opening part 21a, and the water level in the vertical part opens. The strainer 26 can be removed from the valve chamber 22 through the opening 21a in a state below the portion 21a.
[0007]
In the falling rainwater filtering device according to the first aspect of the present invention, the valve body 27 seals the valve chamber 22 in a state where the water level in the vertical portion exceeds the opening 21a. Even if it is located below the intake port 11 a, rainwater does not leak from the valve chamber 22, and the rainwater can flow into the storage tank 11. On the other hand, although foreign matter accumulates on the strainer 26, the strainer 26 can be taken out from the valve chamber 22 through the opening 21a, so that the valve chamber 22 is provided at a position where inspection work in a relatively low place is easy. This makes it easier to check the strainer.
[0008]
The invention according to claim 2 is the invention according to claim 1, wherein the valve body is the ball valve 27, and the valve seat 28 with the circular hole of the ball valve 27 is located above the opening 21 a of the vertical pipe 21. The falling rainwater filtering device is provided in the valve chamber 22 so as to partition the interior of the chamber 22 substantially horizontally.
In the falling rainwater filtering apparatus according to the second aspect, since the ball valve 27 contacts the valve seat 28 in a state where the water level in the vertical portion exceeds the opening 21a, the valve chamber 22 can be reliably sealed.
The invention according to claim 3 is the invention according to claim 1 or 2, wherein a ring 23 is provided substantially horizontally inside the vertical pipe 21 corresponding to the lower end of the opening 21a, and the strainer 26 is a central hole of the ring 23. It is a falling rainwater filtration device attached so as to block 23b.
In the falling rainwater filtering device according to the third aspect, the foreign matter mixed in the rainwater flowing into the vertical pipe 21 below the ring 23 through the central hole 23b can be removed by the strainer 26.
[0009]
The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein a protrusion 23 a is formed on the inner peripheral edge of the ring 23, and a vertical direction is provided between the protrusion 23 a and the peripheral surface of the vertical pipe 21. A ring-shaped concave groove is formed so as to receive rainwater flowing down along the inner peripheral surface of the pipe 21 and guide the received rainwater into the valve chamber 22, and the rainwater flowing into the valve chamber 22 is formed at the bottom of the valve chamber 22. This is a falling rainwater filtration device provided with a drain valve 24 for discharging.
In the falling rainwater filtering device according to the fourth aspect, the initial rainwater when it starts to rain can be received by the concave groove and discharged from the drain valve 24 through the valve chamber 22 to the outside. Here, since the initial rainwater contains a relatively large amount of dust, it is possible to prevent the large amount of dust from being captured by the strainer 26 and to reduce the inspection frequency of the strainer 26.
[0010]
The invention according to claim 5 is the invention according to claim 4, and the falling rainwater filtering device in which the peripheral edge portion 26 a of the bottomed cylindrical strainer 26 is engaged with the protrusion 23 a formed on the inner peripheral edge of the ring 23. It is.
In the falling rainwater filtering device according to the fifth aspect, it is possible to remove the rainwater from the ring 23 by a relatively simple operation of lifting the strainer 26 upward, and the inspection operation can be made relatively easy.
The invention which concerns on Claim 6 is the rainwater storage tank 11a which has the rainwater intake 11a above the lower end of the vertical pipe 21 of the filtration apparatus 20 described in any one of Claim 1 thru | or 5, and the filtration apparatus 20, A rainwater guide pipe 16 having one end connected to the lower end of the vertical pipe 21 and the other end connected to the rainwater intake 11a, and rainwater configured such that the upper end of the vertical pipe 21 is located above the rainwater intake 11a. It is a storage device.
In the rainwater storage device according to claim 6, the rainwater that has been filtered by the filtration device 20 and accumulated in each of the vertical pipe 21 and the rainwater guide pipe 16 rises to reach the rainwater intake 11 a as its water level rises. It flows into the storage tank 11 from the intake port 11a, is stored, and can be used by taking it out as necessary.
[0011]
The invention according to claim 7 is the invention according to claim 6, wherein the drain valve 32 capable of discharging rainwater existing inside each of the vertical pipe 21 and the rainwater guide pipe 16 to the outside is the vertical pipe 21 or the rainwater guide pipe. 16 is a rainwater storage device provided in 16.
Although most of the dust is removed by the filtering action of the strainer 26 of the filtering device 20 and the dust being guided to the valve chamber 22, when this device is used over a long period of time, the foreign matter slightly passing through the strainer 26 settles. There is a risk of sedimentation inside the vertical pipe 21 and the rainwater guide pipe 16. For this reason, it is necessary to wash | clean each inside of the vertical pipe 21 and the rainwater guide pipe 16 for every predetermined period. In the rainwater storage device according to the seventh aspect, by opening the drain valve 32, water can be circulated inside each of the vertical pipe 21 and the stormwater guide pipe 16. Foreign matter precipitated in each of the pipe 21 and the rainwater guide pipe 16 can be easily discharged to the outside.
[0012]
The invention according to claim 8 is the invention according to claim 6 or 7, and is configured to prevent a rainwater flow from the rainwater guide pipe 16 toward the vertical pipe 21 at the lower end of the vertical pipe 21 or the rainwater guide pipe 16. The rainwater storage device is provided with a backflow prevention valve 31.
In the rainwater storage apparatus according to claim 8, rainwater does not flow back from the rainwater guide pipe 16 to the vertical pipe 21 even if the water in the vertical pipe 21 runs out, so that the rainwater intake 11 a is positioned at a low position of the rainwater storage tank 11. For example, it is possible to mount the apparatus near the bottom, and the other end is connected to the rainwater intake port 11a so that the rainwater guide pipe 16 that appears on the ground surface can be shortened to improve the aesthetics of the entire apparatus.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 6, the rainwater storage device 10 of the present invention includes a rainwater storage tank 11 for storing rainwater, a rainwater inflow pipe 12 for supplying rainwater to the rainwater storage tank 11, and a rainwater inflow pipe thereof. 12 and a falling rainwater filtering device 20 provided at 12. The rainwater inflow pipe 12 in the figure is a cylindrical object whose upper end is connected to a rain gutter 14 provided at the edge of the roof 13 a of the house 13, and rain that has fallen on the roof 13 a of the house 13 flows into the rain gutter 14. The collected rainwater is configured to enter the rainwater inflow pipe 12 from the rain gutter 14 and flow down through the rainwater inflow pipe 12. The filtration device 20 is provided in the rainwater inflow pipe 12, and the filtration device 20 and the storage tank 11 are connected by a rainwater guide pipe 16.
[0014]
As shown in FIGS. 1 to 3, the filtering device 20 includes a vertical pipe 21 and a valve chamber 22. The vertical pipe 21 in this embodiment has an upper end connected to the lower end of the rainwater inflow pipe 12 (FIG. 6), and an opening 21 a is formed on the side of the vertical pipe 21 below the full water surface of the storage tank 11. A ring 23 is provided substantially horizontally inside the vertical pipe 21 corresponding to the lower end of the opening 21a. A protrusion 23a is formed on the inner peripheral edge of the ring 23 so as to face upward, and a ring-shaped recess that receives rainwater flowing along the inner peripheral surface of the vertical pipe 21 between the protrusion 23a and the peripheral surface of the vertical pipe 21. A groove is formed.
[0015]
A strainer 26 is attached to the central hole 23b at the center of the ring 23 so as to close the central hole 23b. The strainer 26 in this embodiment is formed by forming a wire mesh into a bottomed cylindrical shape, and the opening 21a is formed in a size that allows the strainer 26 to pass therethrough. The outer diameter of the bottomed cylindrical strainer 26 is formed to be slightly smaller than the inner system of the protrusion 23a formed on the inner peripheral edge of the ring 23, and is placed on the upper end of the protrusion 23a on the peripheral edge of the opening of the strainer 26. A possible flange 26a is formed, and a peripheral edge 26a made of the flange is configured to be engaged with the protrusion 23a. The strainer 26 is detachably attached to the inside of the vertical tube 21 facing the opening 21a of the vertical tube 21 by inserting the bottomed tube portion into the center hole 23b of the ring 23.
On the other hand, the valve chamber 22 is watertightly attached to the vertical pipe 21 so as to cover the opening 21a, and is configured to communicate with the vertical pipe 21 via the opening 21a. A ring 23 that forms a groove is provided inside the vertical pipe 21 corresponding to the lower end of the opening 21a, and the ring-shaped groove is formed to guide the received rainwater into the valve chamber 22. A drain valve 24 for discharging rainwater flowing into the valve chamber 22 is provided at the bottom of the valve chamber 22.
[0016]
As shown in FIGS. 4 and 5, the drainage valve 24 includes a cylindrical body 24 a and a rotary valve 24 c provided so as to be able to rotate while blocking the central hole 24 b of the cylindrical body 24 a. The rotary valve 24c is formed with a large diameter hole 24d having the same diameter as that of the central hole 24b and a small diameter hole 24e having a smaller diameter than the large diameter hole 24d and orthogonal to the large diameter hole 24d. The upper part of the central hole 24 b of the drain valve 24 is covered with a wire mesh 25. This drain valve 24 rotates the rotary valve 24c so that the axial center of the small diameter hole 24e is aligned with the central axis of the central hole 24b as shown in FIG. The rainwater is stored in the valve chamber 22 for a relatively long time, and the rotary valve 24c is rotated so that the axis of the large-diameter hole 24d matches the axis of the central hole 24b as shown in FIG. Thus, the rain water inside the valve chamber 22 can be discharged to the outside relatively quickly through the central hole 24b and the large diameter hole 24d.
[0017]
Returning to FIGS. 1 to 3, a valve body 27 is provided inside the valve chamber 22. The valve body 27 in this embodiment is a valve 27 made of a ball having a specific gravity of less than 1, and the valve seat 28 with the circular hole 28a of the ball valve 27 is located in the valve chamber 22 above the opening 21a of the vertical pipe 21. The valve chamber 22 is provided so as to partition the interior substantially horizontally. A ring-shaped packing 29 is fitted to the hole edge of the circular hole 28a. When the water level in the vertical portion exceeds the opening 21a, the valve element 27 rises due to its buoyancy and comes into contact with the valve seat 28 to contact the valve chamber 22. Configured to seal.
[0018]
On the other hand, the circular hole 28a is formed in such a size that the strainer 26 can be inserted, and a cover plate 22a is detachably provided in the valve chamber 22 above the valve seat 28 so as to cover the valve seat 28. When rain is stopped, rainwater inside the valve chamber 22 is discharged from the drain valve 24 to the outside, so that the ball valve 27 moves away from the valve seat 28 as shown by the solid line in FIG. It descends inside to open the circular hole 28a. Accordingly, when the cover plate 22a is removed from the valve chamber 22 and the valve seat 28 appears, the strainer 26 can be removed from the valve chamber 22 through the circular hole 28a and the opening 21a.
[0019]
As shown in FIG. 6, a rainwater intake 11 a is formed on the upper side wall of the rainwater storage tank 11, and the rainwater intake 11 a is formed above the lower end of the vertical pipe 21 of the filtration device 20. The upper end of the vertical pipe 21 is configured to be positioned above the rainwater intake port 11a. Further, one end of the rainwater guide pipe 16 is connected to the lower end of the vertical pipe 21, and the other end of the rainwater guide pipe 16 is connected to the rainwater intake port 11a. Accordingly, a situation may occur in which rainwater accumulates in each of the vertical pipe 21 and the rainwater guide pipe 16. Therefore, the drain valve 32 that can discharge the rainwater present in each of the vertical pipe 21 and the rainwater guide pipe 16 to the outside is provided vertically. It is provided at the lower end of the tube 21.
[0020]
Next, the operation of the rainwater storage device configured as described above will be described.
When rain falls on the roof 13a of the house 13, the rain flows along the slope of the roof 13a and flows into the rain gutter 14 and is collected. The collected rainwater enters the rainwater inflow pipe 12 from the rain gutter 14, flows down inside the rainwater inflow pipe 12, and reaches the vertical pipe 21 of the filtering device 20. Most of the initial rainwater when it starts to rain is a depression formed between the protrusion 23a formed on the inner peripheral edge of the ring 23 provided in the middle of the vertical pipe 21 and the peripheral surface of the vertical pipe 21. It is received by the groove and guided into the valve chamber 22. Here, since the initial rainwater contains a relatively large amount of dust, it is possible to prevent the large amount of dust from being captured by the strainer 26 and to reduce the inspection frequency of the strainer 26.
[0021]
Here, if the small-diameter hole 24e of the rotary valve 24c in the drain valve 24 is aligned with the center of the central hole 24b, the amount of rainwater that continues to rain and flows down through the rainwater inflow pipe 12 from the drain valve 24 to the outside. Increase beyond the amount discharged. Then, rainwater begins to accumulate inside the valve chamber 22, and when the water level in the valve chamber 22 exceeds the upper end of the projection 23 a provided at the center of the ring 23, the rainwater enters the vertical pipe 21 below the ring 23 through the center hole 23 b. Inflow. Here, since the strainer 26 is attached to the central hole 23b so as to close the central hole 23b, rainwater flowing into the vertical pipe 21 below the ring 23 through the central hole 23b is mixed by the strainer 26. The foreign material to be removed is removed.
[0022]
Here, in the rainwater storage tank 11, the rainwater intake 11 a is formed above the lower end of the vertical pipe 21 of the filtration device 20, so that rainwater that has passed through the ring 23 is accumulated in each of the vertical pipe 21 and the rainwater guide pipe 16. . Then, when the water level of the rainwater accumulated inside the vertical pipe 21 and the rainwater guide pipe 16 rises and reaches the rainwater intake 11a, the rainwater flows into the storage tank 11 from the intake 11a and is stored. The The rainwater stored in the storage tank 11 can be taken out from the faucet 11b as needed and used as watering or car wash water. Here, since the upper end of the vertical pipe 21 is located above the rainwater intake port 11a, a situation in which rainwater is discharged from the upper end of the vertical pipe 21 without flowing into the storage tank is avoided.
[0023]
On the other hand, when the amount of rainwater flowing down the inside of the rainwater inflow pipe 12 increases, rainwater accumulates inside the valve chamber 22 and the water level rises, and the valve element 27 rises inside the valve chamber 22. When the water level in the valve chamber 22 rises, the ball valve 27 rises due to its buoyancy and abuts against the valve seat 28 to seal the valve chamber 22. Therefore, even if the valve chamber 22 is positioned below the rainwater intake port 11a of the storage tank 11, the rainwater does not flow into the storage tank but is discharged from the circular hole 27a of the valve seat 27 in the valve chamber 22 to the outside. A serious situation is avoided.
[0024]
Here, the removed foreign matter accumulates on the strainer 26 of the filtration device 20. For this reason, it is necessary to take out and wash this strainer every predetermined period. When the strainer is taken out, the lid plate 22a is removed from the valve chamber 22 and the valve seat 28 appears when it is not raining. If the ball valve 27 moves away from the valve seat 28 and descends in the valve chamber 22 as shown by the solid line in FIG. 1 and the circular hole 28a is opened, the ball valve 27 passes through the circular hole 28a and the opening 21a. Then, the strainer 26 is taken out from the valve chamber 22. On the other hand, if the ball valve 27 is closing the circular hole 28a immediately after it rains and the lid plate 22a is removed, the rotary valve 24c of the drain valve 24 is rotated as shown in FIG. The axis of the large-diameter hole 24d is aligned with the axis of the central hole 24b. Then, the rain water inside the valve chamber 22 is quickly discharged outside to open the circular hole 28a, and the strainer 26 is taken out from the valve chamber 22 through the circular hole 28a and the opening 21a. Here, the outer diameter of the bottomed cylindrical strainer 26 is formed so as to be slightly smaller than the inner system of the protrusion 23a formed on the inner periphery of the ring 23, and the upper end of the protrusion 23a is formed on the periphery of the opening of the strainer 26. Therefore, the strainer 26 can be removed from the ring 23 by lifting the bottomed cylindrical portion upward so as to be detached from the central hole 23b.
[0025]
In the above-described embodiment, the rainwater storage device using the rainwater storage tank 11 in which the rainwater intake 11a is formed on the upper side wall has been described. However, as shown in FIG. 7, the rainwater intake 11a is a rainwater storage tank. 11 may be formed on the lower side wall. However, in the case shown in FIG. 7, when the rainwater level in the rainwater storage tank 11 is higher than the opening 21a of the vertical pipe 21, the rainwater flows backward from the rainwater intake 11a to the rainwater guide pipe 16. . In order to prevent this, a backflow prevention valve 31 configured to prevent a rainwater flow from the rainwater guide pipe 16 toward the vertical pipe 21 is provided at the lower end of the vertical pipe 21 or the rainwater guide pipe 16. The backflow prevention valve 31 shown in FIG. 7 includes a valve seat 31a having a round hole 31b formed in the center, and a ball valve 31c provided below the valve seat 31a and capable of sealing the round hole 31b. By sealing the round hole 31b, the rainwater flow from the rainwater guide pipe 16 toward the vertical pipe 21 is prevented. If the backflow prevention valve 31 is provided in this way, even if there is no water in the vertical pipe 21, rainwater does not flow back from the rainwater guide pipe 16 to the vertical pipe 21. It is possible to mount it at a location, for example near the bottom. If the rainwater intake 11a is set at a low position of the rainwater storage tank 11, the rainwater guide pipe 16 that is connected to the other end of the rainwater intake 11a and exposed to the ground surface can be shortened. Can be prevented from being viewed for a relatively long time, and the aesthetics of the entire apparatus can be improved.
[0026]
In the above-described embodiment, the case where the vertical pipe 21 is connected to the lower end of the rainwater inflow pipe 12 in the vertical direction has been described. However, the vertical pipe 21 may form the vertical portion of the rainwater inflow pipe 12. good. If the vertical pipe 21 constitutes the vertical portion of the rainwater inflow pipe 12, the vertical pipe 21 can also serve as the rainwater inflow pipe 12, and the number of parts can be reduced by eliminating the independent rainwater inflow pipe 12. .
Furthermore, although the case where the valve body is the ball valve 27 has been described in the above-described embodiment, the valve body may be a flap valve or the like.
[0027]
【The invention's effect】
As described above, according to the present invention, the filtration device includes the vertical pipe, the valve chamber, and the strainer removably attached to the inside of the vertical pipe facing the opening of the vertical pipe, and the water level exceeds the opening. Since the valve body is configured to be able to seal the valve chamber in this state, even if the valve chamber is positioned below the rainwater intake of the storage tank, the rainwater does not leak from the valve chamber, and the rainwater flows into the storage tank. Can be made. On the other hand, although foreign matter accumulates on the strainer, the strainer can be taken out from the valve chamber through the opening. Therefore, by providing the valve chamber at a position where inspection work in a relatively low place is easy, Inspection can be performed easily. In this case, if the valve body is a ball valve and the valve seat is provided in the valve chamber so as to partition the inside of the valve chamber above the opening of the vertical pipe substantially horizontally, the valve chamber can be reliably sealed. If a strainer is attached so as to close the center hole of the ring, foreign matters mixed in rainwater can be removed by the strainer.
[0028]
Also, such a filtration device, a rainwater storage tank having a rainwater intake above the lower end of the vertical pipe of the filtration device, and a rainwater guide having one end connected to the lower end of the vertical pipe and the other end connected to the rainwater intake In the rainwater storage device that is configured so that the upper end of the vertical pipe is located above the rainwater intake, the rainwater that is filtered by the filtration device and accumulated in each of the vertical pipe and the rainwater guide pipe is When the water level rises and reaches the rainwater intake, the water flows into the storage tank from the intake and is stored, and can be used by taking it out as necessary.
[Brief description of the drawings]
1 is a cross-sectional view taken along line AA of FIG. 3 showing a filtration device of the present invention.
2 is a cross-sectional view taken along line BB shown in FIG. 3 showing the shape of the opening of the filtration device.
3 is a cross-sectional view taken along line CC of the filtration device used in the rainwater storage device shown in FIG.
4 is a cross-sectional view taken along the line DD of FIG. 1 showing a drain valve in which a small-diameter hole matches the axis of the central hole.
FIG. 5 is a cross-sectional view corresponding to FIG. 4 showing a drain valve in which a large-diameter hole matches the axis of the central hole.
FIG. 6 is a configuration diagram of a rainwater storage device using the filtration device.
FIG. 7 is a configuration diagram of another rainwater storage device using the filtration device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Rainwater storage apparatus 11 Rainwater storage tank 11a Rainwater inlet 12 Rainwater inflow pipe 16 Rainwater guide pipe 20 Filtration apparatus 21 Vertical pipe 21a Opening part 22 Valve chamber 23 Ring 23a Projection 23b Circular hole 24 Drain valve 26 Strainer 26a Peripheral part 27 Ball valve (Valve)
28 Valve seat 31 Backflow prevention valve 32 Drain valve

Claims (8)

雨水貯留槽(11)に雨水を供給するための雨水流入管(12)に設けられる流下雨水の濾過装置(20)において、
前記貯留槽(11)の満水面より下方に位置し前記雨水流入管(12)の鉛直部を構成するか又は前記雨水流入管(12)の下端に鉛直方向に接続され側部に開口部(21a)を有する鉛直管(21)と、
前記鉛直管(21)に前記開口部(21a)を介して連通し前記開口部(21a)を覆うように前記鉛直管(21)に水密に取付けられかつ内部に弁体(27)を有するバルブ室(22)と、
前記鉛直管(21)の開口部(21a)を臨む前記鉛直管(21)の内部に取外し可能に取付けられたストレーナ(26)とを備え、
前記鉛直部内の水位が前記開口部(21a)を上回る状態で前記弁体(27)が前記バルブ室(22)を密閉しかつ前記鉛直部内の水位が前記開口部(21a)を下回る状態で前記開口部(21a)を介して前記ストレーナ(26)を前記バルブ室(22)から取出し可能に構成されたことを特徴とする流下雨水の濾過装置。
In the falling rainwater filtration device (20) provided in the rainwater inflow pipe (12) for supplying rainwater to the rainwater storage tank (11),
It is located below the full water surface of the storage tank (11) and constitutes the vertical part of the rainwater inflow pipe (12) or is connected to the lower end of the rainwater inflow pipe (12) in the vertical direction and has an opening ( A vertical tube (21) having 21a);
A valve communicated with the vertical pipe (21) via the opening (21a) and water-tightly attached to the vertical pipe (21) so as to cover the opening (21a) and having a valve body (27) therein. Chamber (22);
A strainer (26) removably attached to the inside of the vertical pipe (21) facing the opening (21a) of the vertical pipe (21),
The valve body (27) seals the valve chamber (22) in a state where the water level in the vertical part is higher than the opening (21a), and the water level in the vertical part is lower than the opening (21a). A falling rainwater filtering device characterized in that the strainer (26) can be taken out from the valve chamber (22) through an opening (21a).
弁体がボール弁(27)であって、前記ボール弁(27)の円孔付き弁座(28)が前記鉛直管(21)の開口部(21a)より上方の前記バルブ室(22)の内部を略水平に仕切るように前記バルブ室(22)に設けられた請求項1記載の流下雨水の濾過装置。The valve body is a ball valve (27), and the valve seat (28) with a circular hole of the ball valve (27) is located in the valve chamber (22) above the opening (21a) of the vertical pipe (21). The falling rainwater filtering device according to claim 1, wherein the valve chamber (22) is provided so as to partition the interior substantially horizontally. 開口部(21a)下端に相当する前記鉛直管(21)の内部に略水平にリング(23)が設けられ、ストレーナ(26)が前記リング(23)の中央孔(23b)を塞ぐように取付けられた請求項1又は2記載の流下雨水の濾過装置。A ring (23) is provided substantially horizontally inside the vertical pipe (21) corresponding to the lower end of the opening (21a), and the strainer (26) is attached so as to close the central hole (23b) of the ring (23). The falling rainwater filtering device according to claim 1 or 2. リング(23)の内周縁に突起(23a)が形成され、前記突起(23a)と鉛直管(21)の周面との間に前記鉛直管(21)の内周面に沿って流下する雨水を受けかつ受けた雨水をバルブ室(22)内に導くようにリング状の凹溝が形成され、前記バルブ室(22)の底部に前記バルブ室(22)に流入した雨水を排出する排水バルブ(24)が設けられた請求項1ないし3いずれか1項に記載の流下雨水の濾過装置。A projection (23a) is formed on the inner peripheral edge of the ring (23), and rainwater flows down along the inner peripheral surface of the vertical pipe (21) between the projection (23a) and the peripheral surface of the vertical pipe (21). A drain valve for discharging the rainwater flowing into the valve chamber (22) at the bottom of the valve chamber (22) is formed with a ring-shaped concave groove so as to guide the received rainwater into the valve chamber (22). The falling rainwater filtering device according to any one of claims 1 to 3, wherein (24) is provided. リング(23)の内周縁に形成された突起(23a)に有底円筒状のストレーナ(26)の周縁部(26a)が係止する請求項4記載の流下雨水の濾過装置。The falling rainwater filtering device according to claim 4, wherein the peripheral portion (26a) of the bottomed cylindrical strainer (26) is engaged with a protrusion (23a) formed on the inner peripheral edge of the ring (23). 請求項1ないし5いずれか1項に記載された濾過装置(20)と、
前記濾過装置(20)の鉛直管(21)の下端より上方に雨水取入口(11a)を有する雨水貯留槽(11a)と、
前記鉛直管(21a)の下端に一端が接続され他端が前記雨水取入口(11a)に接続された雨水案内管(16)とを備え、
前記鉛直管(21)の上端が前記雨水取入口(11a)より上方に位置するように構成された雨水貯留装置。
A filtration device (20) according to any one of claims 1 to 5;
A rainwater storage tank (11a) having a rainwater intake (11a) above the lower end of the vertical pipe (21) of the filtration device (20);
A rainwater guide pipe (16) having one end connected to the lower end of the vertical pipe (21a) and the other end connected to the rainwater intake (11a);
A rainwater storage device configured such that an upper end of the vertical pipe (21) is positioned above the rainwater intake (11a).
鉛直管(21)及び雨水案内管(16)の各内部に存在する雨水を外部に排出可能なドレンバルブ(32)が前記鉛直管(21)又は前記雨水案内管(16)に設けられた請求項6記載の雨水貯留装置。A drain valve (32) capable of discharging rainwater present inside each of the vertical pipe (21) and the rainwater guide pipe (16) to the outside is provided in the vertical pipe (21) or the rainwater guide pipe (16). Item 7. A rainwater storage device according to item 6. 鉛直管(21)の下端又は雨水案内管(16)に前記雨水案内管(16)から鉛直管(21)に向かう雨水流を防止するように構成された逆流防止弁(31)が設けられた請求項6又は7記載の雨水貯留装置。The lower end of the vertical pipe (21) or the rainwater guide pipe (16) is provided with a backflow prevention valve (31) configured to prevent a rainwater flow from the rainwater guide pipe (16) toward the vertical pipe (21). The rainwater storage device according to claim 6 or 7.
JP2003179023A 2003-06-24 2003-06-24 Flow-down rainwater filtration apparatus and rainwater storage apparatus using the same Pending JP2005016044A (en)

Priority Applications (1)

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