JP3805660B2

JP3805660B2 - Ball type fire hydrant with built-in air valve

Info

Publication number: JP3805660B2
Application number: JP2001330556A
Authority: JP
Inventors: 政和山本
Original assignee: 政和山本
Priority date: 2001-10-29
Filing date: 2001-10-29
Publication date: 2006-08-02
Anticipated expiration: 2021-10-29
Also published as: JP2003126284A

Description

【０００１】
【発明の属する技術分野】
本発明は、消火栓の配水管路内に溜まった空気を自動排出できる空気弁内蔵型ボール式消火栓に関するものである。更に詳細には、本発明は、配水管内に流れたり溜まったりした空気を通常時（消火活動若しくはそれに類する行為等以外の時）つまり閉鎖時に自動的に排気できる空気弁内蔵型ボール式地下式消火栓に関するものである。
【０００２】
【発明の背景】
配水管に空気が溜まると、消火時の放水に振れを生じたり、断続的な水流になったりして、スムーズな消火活動に支障をきたす。また、配水管に空気溜まりが常時できると、その部分は酸化等の関係もあり、腐食が起こり易い状況になる。そして、このような腐食は、漏水の発生にもつながり、さらに空気体積が多ければそれだけ損失水量が多く、通水能力が落ち、流量経済効果もよくない。
【０００３】
このようなことから、消火栓に空気弁を内蔵させることが試みられている。例えば、本件出願人は、先に急速空気弁付き消火栓について特許出願を済ませている（特願２００１−７５８５３号）。
【０００４】
しかしながら、従来の地下式消火栓の空気弁は、全てケレップ型やそれに類似した弁体であり、ボール式消火栓に空気弁を内蔵したものはなかった。ボール式地下式消火栓の場合、限られたボールの範囲内しかなく、空気弁を組み込んで内蔵することやその加工は困難と考えられていた。ところが上述したように、配水管内の空気は種々の問題を生じさせるので、その解決が望まれていた。
【０００５】
本発明は、上記事情に鑑みてなされたものであり、その主たる目的は、簡易な構成でボール式地下式消火栓に空気弁を内蔵させ、配水管内の空気を確実に排気可能な空気弁内蔵型ボール式消火栓を提供することにある。
【０００６】
【課題を解決するための手段】
上記目的を達成するために、本発明の空気弁内蔵型ボール式消火栓は、以下の（Ａ）から（Ｅ）までの構成要件を備えることを特徴とする。
（Ａ）上下に貫通して、給水側の下部開口と排水側の上部開口が形成された弁箱。
（Ｂ）この弁箱内に回転操作可能に設けられ、直径方向に貫通して第１流通穴が形成され、この第１流通穴と弁箱の上下開口との対応関係の有無により、弁箱の下部開口から上部開口への連通を開閉可能とされ、この連通の閉鎖状態において弁箱の上下開口に向けて配置される上下の側壁に、前記第１流通穴と交差して第２流通穴を貫通形成された弁体。
（Ｃ）前記閉鎖状態における弁体の上側壁の第２流通穴内に設けられ、下端部と側面に連通穴を開けられた案内部材。
（Ｄ）案内部材内に収容され、水に浮くことで案内部材内の水量に応じて上下動可能に設けられたフロート弁体。
（Ｅ）フロート弁体の上部に配置された状態で案内部材内に収容され、フロート弁体に伴って上下動可能で、案内部材内に入った空気を外方へ排気する排気穴を形成され、この排気穴をフロート弁体によって開閉可能とされ、案内部材の側面上部の連通穴よりも下方へ降下することでその連通穴を介して空気を外方へ排気可能な遊動弁体。
【０００７】
或いは、本発明の空気弁内蔵型ボール式消火栓は、以下の（Ａ）から（Ｆ）までの構成要件を備えることを特徴とする。
（Ａ）上下に貫通して、給水側の下部開口と排水側の上部開口が形成され、その上部開口に弁蓋を設けられた弁箱。
（Ｂ）弁蓋の上部に設けられ、消火ホースが接続可能とされた口金。
（Ｃ）直径方向に貫通して第１流通穴が形成された略球状とされ、弁箱及び弁蓋にて形成される中空部内に回転操作可能に設けられることで、弁箱側の下部開口から弁蓋側の上部開口への連通を開閉可能とされ、この連通の閉鎖状態における上下の側壁に、前記第１流通穴と交差して第２流通穴が上下方向に貫通形成された弁体。
（Ｄ）前記閉鎖状態における弁体の上側壁の第２流通穴内に設けられ、下端部と側面に連通穴を開けられた案内部材。
（Ｅ）案内部材内に収容され、水に浮くことで案内部材内の水量に応じて上下動可能に設けられたフロート弁体。
（Ｆ）フロート弁体の上部に配置された状態で案内部材内に収容され、フロート弁体に伴って上下動可能で、案内部材内に入った空気を外方へ排気する排気穴を形成され、この排気穴をフロート弁体によって開閉可能とされ、案内部材の側面上部の連通穴よりも下方へ降下することでその連通穴を介して空気を外方へ排気可能な遊動弁体。
【０００８】
また、好ましくは上記いずれかの構成に加えて、前記第１流通穴及び第２流通穴は、略球状の弁体の直径方向に貫通して形成され、第２流通穴は、第１流通穴と直交して形成され、第１流通穴及び第２流通穴の双方に直交し、且つ略球状の弁体の直径方向に沿って配置される弁棒にて、前記弁体が回転操作されることを特徴とする空気弁内蔵型ボール式消火栓である。
【０００９】
さらに好ましくは上記構成に加えて、前記案内部材は、上方に開口した略円筒状で、その下面は略球面状に下方に膨出して形成され、遊動弁体が最も降下した状態でその上下位置となる側面と、下面中央部とに連通穴を開けられており、前記フロート弁体は、略球状に形成されており、前記遊動弁体は、案内部材の内径よりも僅かに小径の略円板状で、中央部に上下方向に貫通して排気穴が設けられており、案内部材の上部には、案内部材からの遊動弁体の脱落を防止するフロート押えが設けられ、このフロート押えの中央部には、遊動弁体ないし案内部材からの空気を外方へ排気する排気穴が形成されていることを特徴とする空気弁内蔵型ボール式消火栓である。
【００１０】
【発明の実施の形態】
以下、本発明の空気弁内蔵型ボール式消火栓について、実施例に基づき更に詳細に説明する。
【００１１】
図１から図３は、本発明の空気弁内蔵型ボール式地下式消火栓の一実施例を示す図であり、図１は一部を断面にした正面図であり、弁を開いた状態を示し、図２及び図３は側面側から見た縦断面図であり、図２は弁を開いた状態、図３は弁を閉じた状態を示している。
【００１２】
本実施例の消火栓は、水道用空気弁付きボール式地下式消火栓であり、本体ケースとして弁箱１を備えている。この弁箱１は、上下方向に開口する略円筒状とされ、その上下両端部には径方向外側に突出してフランジ２，３を一体形成されている。図１において、弁箱１の右側端部上方には、後述する弁棒７が挿通される略円筒状部８が右側に延出して一体形成されている。
【００１３】
弁箱１の上下方向に沿って形成された貫通穴４は、その内周面が上方に開口した略球面状に形成されており、その略球面状部４ａの下部には、円筒状部４ｂを介してテーパ部４ｃとされている。なお、このテーパ部４ｃは、弁箱１下部のフランジ３とほぼ対応した高さ位置に形成され、下方に行くに従って拡径して形成されている。
【００１４】
弁箱１の上部開口には、弁蓋５が取り付けられる。この弁蓋５は、略円筒形状であり、下端部には径方向外側に突出してフランジ６を一体形成されている。このフランジ６を弁箱１上部のフランジ２に重ね合わせてボルト・ナット９にて締結することで、弁箱１の上部に弁蓋５が取り付けられる。
【００１５】
弁蓋５には、弁箱１への取付状態において弁箱１の貫通穴４と連続的に、上下方向に貫通して貫通穴１０が形成されている。弁蓋５の貫通穴１０は、上端部１０ａが段付きの円筒状に形成される一方、その下端部１０ｂが下方に開口して略球面状に形成されている。そして、弁箱１への弁蓋５の取付状態において、弁箱１と弁蓋５の各貫通穴４，１０の略球面状部４ａ，１０ｂにて、略球状空間が形成されることになる。この略球状空間は、球体の上下が略水平に切断されたような形状とされている。
【００１６】
そして、この略球状空間の上下両端部（弁箱１の略球面状部４ａの下端部と、弁蓋５の略球面状部１０ｂの上端部）には、それぞれ周方向に沿ってパッキン１１，１１が設けられている。なお、図２及び図３に示すように、略球状空間の前後部には、略球面状壁１３，１３が配置されている。そして、この略球面状壁１３の内周面の上下部にも、それぞれパッキン１１，１１が設けられている。
【００１７】
弁箱１と弁蓋５との間で形成される略球状空間には、略球状の弁体１２が回動可能に収容されて設けられる。この弁体１２を形成する材料は特に問わないが、本実施例では例えば砲金にて形成され、中実の球体を切り出して形成することができる。この弁体１２は、球体の対向する端部（図１では上下部）が略水平に切除された形状とされている。そして、このようにして形成された水平面に垂直に、弁体１２の直径方向（図１では上下方向）に貫通して、第１流通穴１４が形成されている。この第１流通穴１４は、弁箱１に形成した貫通穴４の円筒状部４ｂより僅かに小径に形成されている。
【００１８】
また弁体１２には、第１流通穴１４と垂直方向（図１では前後方向）に、弁体１２の直径方向に貫通して、第２流通穴１５が形成されている（図２，図３）。つまり、第２流通穴１５は、第１流通穴１４が形成されることで構成された弁体１２の周側壁に、弁体１２の直径方向に対向してそれぞれ形成される。この第２流通穴１５は、第１流通穴１４よりもかなり小径に形成されている。
【００１９】
弁体１２は、後述するように、図１において前後方向（図２ないし図３において時計ないし反時計方向）に回転される訳であるが、図３の弁閉鎖時において上方に配置される側の側壁に形成された第２流通穴１５は、上端部が二段階に拡径されて形成されている（図３）。つまり、図３において弁体１２の上側壁に形成された第２流通穴１５は、下側壁に形成された第２流通穴１５と同軸上に配置され、下端部１５ａが下側壁の第２流通穴１５と略同径とされ、中央部１５ｂがやや拡径された後、上端部１５ｃがもう一段拡径された円筒状の穴に形成されている。
【００２０】
図３において、弁体１２の上側壁の第２流通穴１５には、空気弁１６が内蔵される。この空気弁１６部分の拡大図を図４及び図５に示した。本実施例の空気弁１６は、案内部材（フロート弁体案内）１７と、フロート弁体１８と、遊動弁体１９と、フロート押え２０とによって構成されている。案内部材１７は、上方に開口した略円筒形状とされ、その上端部には、径方向外側に突出してフランジ１７ａが一体形成されている。
【００２１】
なお、案内部材１７のフランジ１７ａの外径は、弁体１２の第２流通穴１５の上方拡径部１５ｃの径とほぼ対応して形成されている。よって、このフランジ１７ａの下面を、上方拡径部１５ｃの下端面に当接して、案内部材１７は下方拡径部１５ｂ内に保持される。また、案内部材１７の外径は下方拡径部１５ｂの内径よりも小さく、案内部材１７の外周面と下方拡径部１５ｂの内周面との間に、水ないし空気が入る隙間が形成された状態に配置される。
【００２２】
案内部材１７の下端面は浅い略球面状に下方に僅かに突出して形成されている。また、案内部材１７には、下端面と側面にそれぞれ、案内部材１７の内外を連通する連通穴２１（２１ａ〜２１ｃ）を形成されている。図示例では、案内部材１７の下面中央部（２１ａ）に形成されると共に、案内部材の側面には、上下に離間して２列（２１ｃ，２１ｂ）になるよう複数個の連通穴が形成されている。
【００２３】
本実施例のフロート弁体１８は、案内部材１７の内径よりもやや小径の球状に形成されている。フロート弁体１８は、案内部材１７内に上下動可能に収容され、また水に浮くよう形成されている。従って、フロート弁体１８は、案内部材１７内の水量に応じて上下動可能とされる。
【００２４】
本実施例の遊動弁体１９は、案内部材１７の内径よりも僅かに小径の円板状に形成され、案内部材１７内に上下動可能に収容され、また水に浮くよう形成されている。遊動弁体１９の中央部には、段付きの略円形穴が上下方向に貫通形成されている。下方の小径穴は、下方へ行くに従って縮径したテーパ穴に形成され、このテーパ穴にはこれと略適合した大きさの円錐弁座２２がはめ込まれる。
【００２５】
円錐弁座２２の中央部には、例えば約２ｍｍ程度の穴（排気穴）２３を上下方向に貫通形成されている。円錐弁座２２は、遊動弁体１９の上部大径穴に取り付けられる弁座押え２４によって固定される。弁座押え２４は、中央部に円錐弁座２２の排気穴２３よりも大径の排気穴２５を貫通形成された略円板形状とされ、その外周面に形成された雄ねじを、遊動弁体１９の大径穴内周面に形成された雌ねじにねじ込んで取り付けられる。これにより、円錐弁座２２は、遊動弁体１９からの脱落が防止される。
【００２６】
案内部材１７のフランジ１７ａの上面には、フロート押え２０が取り付けられる。このフロート押え２０は、案内部材１７のフランジ１７ａの外径に等しい外径の円板状に形成され、その外周側下端面を案内部材１７のフランジ１７ａ上面に当接されて配置される。フロート押え２０の中央部には、上下方向に貫通して排気穴２６が形成されている。この排気穴２６は、図示例では弁座押え２４の排気穴２５より大径で、弁座押え２５の外径より小径とされている。
【００２７】
案内部材１７に対するフロート押え２０の位置決めは、弁体１２の第２流通穴１５の上方拡径部１５ｃにねじ込まれる止め部材２７によって行われる。第２流通穴１５の上方拡径部１５ｃはネジ穴とされているので、そのネジ穴１５ｃに外周面にネジを形成された止め部材２７をねじ込むことができる。これにより、止め部材２７が、案内部材１７のフランジ部１７ａとフロート押え２０とを位置決め保持する。なお、止め部材２７の中央部には、貫通穴（排気穴）２８が形成されている。
【００２８】
以上のような構成の略球状の弁体１２は、弁箱１と弁蓋５との間で形成される略球状空間、ないしその内部に同心に配置された略球面状壁１３の内側に回動操作可能に設けられる。本実施例では、図１に示すように、第１流通穴１４及び第２流通穴１５の双方に垂直な方向（図１における右側）に弁棒７を連結して、この弁棒７を回転操作することで弁体１２を回転操作可能としている。本実施例では、弁体１２が図２と図３の位置との間を９０度正逆に回転可能とされている。なお、弁体１２は、弁箱１や弁蓋５等に設けられたパッキン１１に接触状態で回動される。
【００２９】
つまり、弁棒７は一端部を弁体１２に結合され、他端部は操作部２９を介して上方に延びる操作棒３０に結合されている。弁棒７と操作棒３０とは、例えばベベルギア３１を介して結合されており、操作棒３０の回転がベベルギア３１を介して弁棒７に伝達され、弁体１２が回転されることになる。なお、弁棒７の中途外周面にはＯリングが配置されており、操作部２９側に水がくることはない。
【００３０】
ところで、弁蓋５の上端部には、補助部材３２を介して口金３３が設けられており、口金３３には蓋３４が着脱可能に設けられている。
【００３１】
本実施例の消火栓は、弁箱１下端部のフランジ３を補修弁３５のフランジ３６に連結され、その補修弁３５や接続管を介して水道管に接続されて設置される。通常は、図３に示すように、空気弁１６が上部開口側に配置された状態とされる。その状態では、弁箱１の下部開口からの水は、弁体１２の下側壁の第２流通穴１５を介して、左右方向に配置された第１流通穴１４に入り、更に弁体１２の上側壁の第２流通穴１５ａ，１５ｂ内に入り、その弁体１６にて封止される。
【００３２】
つまり、図４に示すように、案内部材１７には複数個の連通穴２１（２１ａ〜２１ｃ）が開けられているので、水は案内部材１７内に入る。これにより、案内部材１７内のフロート弁体１８が水の浮力によって上昇し、フロート弁体１８の上部が遊動弁体１９の排出口２３，２５を塞いだ図４の状態となる。よって、遊動弁体１９から外部への水の流出は防止される。
【００３３】
今、微小な空気が水道管から消火栓に入ったとすると、その空気は第２流通穴１５を通って上昇し、案内部材１７下部の連通穴２１ａ等から案内部材１７内に進入し、案内部材１７の上部へ移動する。フロート弁体１８と遊動弁体１９との間まで上昇した空気は、フロート弁体１８を僅かに下方に押し下げて、遊動弁体１９の排気穴２３，２５、フロート押え２０の排気穴２６、止め部材２７の排気穴２８を介して消火栓外部へ排出される。なお、例えば口金３３と蓋３４との間は、完全な気密状態でないので、止め部材２７からの空気は容易に外部へ導出される。
【００３４】
一方、比較的大量の空気が消火栓に入った場合には、弁体１２内の空気弁１６が急速排気を行う。すなわち、この場合には、図５に示すように、大量の空気が案内部材１７の上部に一時的にたまることで、案内部材１７内の水が少なくなり、フロート弁体１８が浮力を失って下方に下がると共に、遊動弁体１９もこれに伴って重力によって下方に下がることになる。この状態において案内部材１７の側面には、遊動弁体１９の上下位置となる高さにそれぞれ連通穴２１ｃ，２１ｂが配置される。従って、空気は遊動弁体１９の上方に配置された連通穴２１ｃを通って、フロート押え２０の排気穴２６、止め部材２７の排気穴２８を介して消火栓外部に急速排気される。
【００３５】
そして、空気が排出されると、遊動弁体１９の下部に配置された排気穴２１ｂや、案内部材１７の下面に形成された排気穴２１ａを通って水が案内部材１７内に流入し、浮力を得たフロート弁体１８や遊動弁体１９は上昇して、図４の状態に戻されることになる。
【００３６】
なお、上記実施例の構成によれば、限られたボールの範囲内で、空気弁を組み込むことができる。そして、空気弁を組み込むことで、管内の空気をなくし、消火活動の円滑化や、管内の錆の発生防止を図ることができる。また、エアーハンマーなどの防止にもなる。
【００３７】
ところで、水道配管側が負圧となった場合には、図４の状態から、フロート弁体１８（ないし遊動弁体１９）が下方に降下して、止め部材２７の排気穴２８、フロート押え２０の排気穴２６を介して外気を吸い込むことで、その負圧を解消することができる。
【００３８】
また、消火栓の使用時には、蓋３４を取り外して、口金３３に消火ホース等を接続した状態で、操作棒３０を回転操作して、弁棒７を介して弁体１２を回転させればよい。弁体１２を回転させると、図１のように、弁箱１の下部開口から弁蓋５側の上部開口との間を、弁体１の第１流通穴１４にて連通することになる。
【００３９】
ところで、上記実施例のボール式消火栓については、既設のボール式消火栓に代えて設置することができる。つまり、現在、ボール式の使用されている消火栓ボックスには、通常同じサイズの規格品が使用されているので、補修弁３５を止めて取り替えることで、不断水工事で従来取付けられていたボール式地下式消火栓を、ボール式地下式空気弁内蔵型消火栓とすることができる。
【００４０】
なお、本発明の空気弁内蔵型ボール式消火栓は、上記各実施例の構成に限らず、適宜変更可能である。
例えばボール、つまり弁体１２の形状は適宜変更可能である。つまり、上記実施例では略球状の弁体１２を使用した場合について説明したが、略楕円ひずみ型の弁体としてもよい。その場合には、弁体１２の形状に合わせて、弁箱１や弁蓋５の形状を適宜変更するのは言うまでもない。
【００４１】
【発明の効果】
以上詳述したように、本発明の空気弁内蔵型ボール式消火栓によれば、簡易な構成でボール式地下式消火栓に空気弁を内蔵させ、配水管内の空気を確実に排気可能な消火栓を提供することができる。
【図面の簡単な説明】
【図１】本発明の空気弁内蔵型ボール式地下式消火栓の一実施例を示す図であり、弁を開いた状態の一部を断面にした正面図である。
【図２】図１の空気弁内蔵型ボール式地下式消火栓において、弁を開いた状態を示し、側面側から見た縦断面図である。
【図３】図１の空気弁内蔵型ボール式地下式消火栓において、弁を閉じた状態を示し、側面側から見た縦断面図である。
【図４】図１の空気弁内蔵型ボール式地下式消火栓の空気弁部分の拡大図であり、通常時の状態を示している。
【図５】図１の空気弁内蔵型ボール式地下式消火栓の空気弁部分の拡大図であり、急速排気時の状態を示している。
【符号の説明】
１弁箱
５弁蓋
７弁棒
１２弁体
１４第１流通穴
１５第２流通穴
１７案内部材
１８フロート弁体
１９遊動弁体
２０フロート押え
２１（２１ａ〜２１ｃ）連通穴
２３，２５排気穴
２６排気穴
３３口金[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ball-type fire hydrant with a built-in air valve that can automatically discharge air accumulated in a water distribution pipe of the fire hydrant. More specifically, the present invention relates to a ball type underground fire hydrant with a built-in air valve that can automatically exhaust air that has flowed or accumulated in the water pipe at normal times (other than fire fighting activities or similar activities), that is, when closed. It is about.
[0002]
BACKGROUND OF THE INVENTION
If air accumulates in the water distribution pipes, it may cause fluctuations in the water discharge during fire extinguishing or intermittent water flow, which hinders smooth fire fighting activities. In addition, if the water pipes are always able to retain air, the portion is also related to oxidation and the like, and corrosion tends to occur. And such corrosion also leads to the occurrence of water leakage, and if the air volume is large, the amount of water loss is increased, the water flow capacity is reduced, and the flow rate economic effect is not good.
[0003]
For this reason, attempts have been made to incorporate an air valve in the fire hydrant. For example, the present applicant has already filed a patent application for a fire hydrant with a quick air valve (Japanese Patent Application No. 2001-75853).
[0004]
However, all of the conventional underground fire hydrant air valves are of the Kelep type or similar, and no ball type fire hydrant has a built-in air valve. In the case of a ball-type underground fire hydrant, there was only a limited range of balls, and it was considered difficult to incorporate and process an air valve. However, as described above, the air in the water distribution pipe causes various problems, and thus a solution has been desired.
[0005]
The present invention has been made in view of the above circumstances, and its main purpose is to incorporate an air valve in a ball-type underground fire hydrant with a simple configuration and to reliably exhaust the air in the water pipe. The object is to provide a ball-type fire hydrant.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a ball-type fire hydrant with a built-in air valve of the present invention is characterized by comprising the following constituents (A) to (E).
(A) A valve box penetrating vertically and having a lower opening on the water supply side and an upper opening on the drain side.
(B) It is provided in this valve box so that rotation is possible, the 1st flow hole is formed penetrating in the diameter direction, and the valve box is determined depending on whether or not there is a correspondence between the first flow hole and the upper and lower openings of the valve box. The communication from the lower opening to the upper opening can be opened and closed, and in the closed state of the communication, the upper and lower side walls disposed toward the upper and lower openings of the valve box intersect the first circulation hole and the second circulation hole. A valve body formed through it.
(C) A guide member provided in the second flow hole in the upper side wall of the valve body in the closed state and having a communication hole formed in the lower end portion and the side surface.
(D) A float valve body housed in the guide member and provided so as to move up and down according to the amount of water in the guide member by floating in water.
(E) It is accommodated in the guide member in a state of being arranged at the upper part of the float valve body, can be moved up and down with the float valve body, and has an exhaust hole for exhausting air that has entered the guide member to the outside. The floating valve body can be opened and closed by a float valve body, and can be exhausted outwardly through the communication hole by descending below the communication hole on the upper side surface of the guide member.
[0007]
Or the ball-type fire hydrant with a built-in air valve of the present invention is characterized by comprising the following structural requirements (A) to (F).
(A) A valve box penetrating vertically and having a lower opening on the water supply side and an upper opening on the drain side, and a valve lid provided on the upper opening.
(B) A base provided on the top of the valve lid and to which a fire hose can be connected.
(C) It is made into the substantially spherical shape which the 1st flow hole was formed penetrating in the diameter direction, and is provided in the hollow part formed by a valve box and a valve lid so that rotation operation is possible, the lower opening by the side of a valve box The valve body can be opened and closed to communicate with the upper opening on the valve lid side, and the second flow hole is formed in the upper and lower side walls in the closed state so as to cross the first flow hole in the vertical direction. .
(D) A guide member provided in the second flow hole in the upper side wall of the valve body in the closed state and having a communication hole formed in the lower end portion and the side surface.
(E) A float valve body that is accommodated in the guide member and is provided so as to move up and down according to the amount of water in the guide member by floating in water.
(F) It is accommodated in the guide member in a state of being arranged at the upper part of the float valve body, can be moved up and down with the float valve body, and has an exhaust hole for exhausting air that has entered the guide member to the outside. The floating valve body can be opened and closed by a float valve body, and can be exhausted outwardly through the communication hole by descending below the communication hole on the upper side surface of the guide member.
[0008]
Preferably, in addition to any of the above-described configurations, the first flow hole and the second flow hole are formed so as to penetrate in the diameter direction of the substantially spherical valve body, and the second flow hole is the first flow hole. The valve body is rotated by a valve rod that is formed orthogonally to the first and second flow holes, and is disposed along the diameter direction of the substantially spherical valve body. This is a ball-type fire hydrant with a built-in air valve.
[0009]
More preferably, in addition to the above-described configuration, the guide member has a substantially cylindrical shape opened upward, and a lower surface of the guide member is formed to bulge downward in a substantially spherical shape. The float valve element is formed in a substantially spherical shape, and the floating valve element is a substantially circular shape having a slightly smaller diameter than the inner diameter of the guide member. It is plate-shaped and has an exhaust hole that penetrates in the vertical direction in the center. A float presser is provided at the top of the guide member to prevent the floating valve element from falling off the guide member. An air valve built-in ball type fire hydrant is characterized in that an exhaust hole for exhausting the air from the idle valve body or the guide member to the outside is formed at the center.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the air valve built-in ball type fire hydrant of the present invention will be described in more detail based on examples.
[0011]
1 to 3 are views showing an embodiment of a ball type underground fire hydrant with a built-in air valve according to the present invention, and FIG. 1 is a front view with a partial cross section showing a state in which the valve is opened. 2 and 3 are longitudinal sectional views as seen from the side, FIG. 2 shows a state in which the valve is opened, and FIG. 3 shows a state in which the valve is closed.
[0012]
The fire hydrant of the present embodiment is a ball type underground fire hydrant with a water valve for water supply, and includes a valve box 1 as a main body case. The valve box 1 has a substantially cylindrical shape that opens in the vertical direction, and flanges 2 and 3 are integrally formed at both upper and lower end portions so as to protrude radially outward. In FIG. 1, a substantially cylindrical portion 8 into which a later-described valve stem 7 is inserted is integrally formed above the right end portion of the valve box 1 so as to extend to the right side.
[0013]
The through hole 4 formed along the vertical direction of the valve box 1 is formed in a substantially spherical shape having an inner peripheral surface opened upward, and a cylindrical portion 4b is formed below the substantially spherical portion 4a. It is set as the taper part 4c through this. In addition, this taper part 4c is formed in the height position substantially corresponding to the flange 3 of the valve box 1 lower part, and is formed so that a diameter is expanded as it goes below.
[0014]
A valve lid 5 is attached to the upper opening of the valve box 1. The valve lid 5 has a substantially cylindrical shape, and a flange 6 is integrally formed at the lower end portion so as to protrude radially outward. The valve lid 5 is attached to the upper part of the valve box 1 by superimposing the flange 6 on the flange 2 on the upper part of the valve box 1 and fastening them with bolts and nuts 9.
[0015]
A through hole 10 is formed in the valve lid 5 so as to pass through in the vertical direction continuously with the through hole 4 of the valve box 1 when attached to the valve box 1. The through hole 10 of the valve lid 5 has an upper end portion 10a formed in a stepped cylindrical shape, and a lower end portion 10b opened downward and formed in a substantially spherical shape. When the valve lid 5 is attached to the valve box 1, a substantially spherical space is formed by the substantially spherical portions 4 a and 10 b of the through holes 4 and 10 of the valve box 1 and the valve lid 5. . The substantially spherical space has a shape in which the top and bottom of the sphere are cut substantially horizontally.
[0016]
Further, packing 11, along the circumferential direction, is provided at both upper and lower end portions of the substantially spherical space (the lower end portion of the substantially spherical portion 4 a of the valve box 1 and the upper end portion of the substantially spherical portion 10 b of the valve lid 5). 11 is provided. As shown in FIGS. 2 and 3, substantially spherical walls 13, 13 are arranged in the front and rear portions of the substantially spherical space. Further, packings 11 and 11 are also provided on the upper and lower portions of the inner peripheral surface of the substantially spherical wall 13, respectively.
[0017]
In a substantially spherical space formed between the valve box 1 and the valve lid 5, a substantially spherical valve body 12 is rotatably accommodated and provided. Although the material which forms this valve body 12 is not ask | required in particular, in a present Example, it forms with a gun metal, for example, and it can cut and form a solid sphere. The valve body 12 has a shape in which opposite end portions (upper and lower portions in FIG. 1) of the sphere are cut off substantially horizontally. And the 1st flow hole 14 is formed through the diameter direction (up-down direction in FIG. 1) of the valve body 12 perpendicularly to the horizontal plane formed in this way. The first flow hole 14 is formed to have a slightly smaller diameter than the cylindrical portion 4 b of the through hole 4 formed in the valve box 1.
[0018]
Further, the valve body 12 is formed with a second flow hole 15 penetrating in the diameter direction of the valve body 12 in the direction perpendicular to the first flow hole 14 (the front-rear direction in FIG. 1) (FIG. 2, FIG. 2). 3). That is, the second flow holes 15 are respectively formed on the peripheral side wall of the valve body 12 formed by forming the first flow holes 14 so as to face the diameter direction of the valve body 12. The second flow hole 15 is formed to have a considerably smaller diameter than the first flow hole 14.
[0019]
As will be described later, the valve body 12 is rotated in the front-rear direction in FIG. 1 (clockwise or counterclockwise in FIGS. 2 to 3), but is disposed on the upper side when the valve is closed in FIG. The second flow hole 15 formed in the side wall of the upper end portion is formed by expanding the upper end portion in two stages (FIG. 3). That is, the second flow hole 15 formed in the upper wall of the valve body 12 in FIG. 3 is arranged coaxially with the second flow hole 15 formed in the lower wall, and the lower end 15a is the second flow hole of the lower wall. The diameter of the hole 15 is substantially the same as that of the hole 15, and after the central portion 15 b is slightly enlarged, the upper end portion 15 c is formed as a cylindrical hole having an enlarged diameter.
[0020]
In FIG. 3, an air valve 16 is built in the second flow hole 15 on the upper side wall of the valve body 12. Enlarged views of the air valve 16 are shown in FIGS. The air valve 16 of the present embodiment includes a guide member (float valve element guide) 17, a float valve element 18, an idle valve element 19, and a float presser 20. The guide member 17 has a substantially cylindrical shape opened upward, and a flange 17a is integrally formed at the upper end portion thereof so as to protrude radially outward.
[0021]
The outer diameter of the flange 17a of the guide member 17 is formed substantially corresponding to the diameter of the upper enlarged portion 15c of the second flow hole 15 of the valve body 12. Therefore, the lower surface of the flange 17a is brought into contact with the lower end surface of the upper enlarged diameter portion 15c, and the guide member 17 is held in the lower enlarged diameter portion 15b. Further, the outer diameter of the guide member 17 is smaller than the inner diameter of the lower enlarged portion 15b, and a gap for water or air to enter is formed between the outer peripheral surface of the guide member 17 and the inner peripheral surface of the lower enlarged portion 15b. Placed in a state.
[0022]
The lower end surface of the guide member 17 is formed to protrude slightly downward in a shallow substantially spherical shape. The guide member 17 is formed with communication holes 21 (21a to 21c) for communicating the inside and outside of the guide member 17 on the lower end surface and the side surface, respectively. In the illustrated example, a plurality of communication holes are formed in the center portion (21a) of the lower surface of the guide member 17 and on the side surface of the guide member so as to be separated in the vertical direction into two rows (21c, 21b). ing.
[0023]
The float valve body 18 of this embodiment is formed in a spherical shape having a slightly smaller diameter than the inner diameter of the guide member 17. The float valve body 18 is accommodated in the guide member 17 so as to be movable up and down, and is formed to float on water. Therefore, the float valve body 18 can be moved up and down according to the amount of water in the guide member 17.
[0024]
The floating valve body 19 of the present embodiment is formed in a disk shape having a diameter slightly smaller than the inner diameter of the guide member 17, is accommodated in the guide member 17 so as to be movable up and down, and is formed to float on water. A stepped substantially circular hole is formed in the center of the idle valve body 19 in the vertical direction. The lower small-diameter hole is formed into a tapered hole that is reduced in diameter as it goes downward, and a conical valve seat 22 having a size substantially matched with the tapered hole is fitted into the tapered hole.
[0025]
A central portion of the conical valve seat 22 is formed with a hole (exhaust hole) 23 of about 2 mm, for example, penetrating in the vertical direction. The conical valve seat 22 is fixed by a valve seat retainer 24 attached to the upper large-diameter hole of the floating valve body 19. The valve seat retainer 24 is formed in a substantially disc shape having a central portion formed through an exhaust hole 25 having a diameter larger than that of the exhaust hole 23 of the conical valve seat 22, and a male screw formed on the outer peripheral surface of the valve seat retainer 24. It attaches by screwing in the internal thread formed in 19 large diameter hole internal peripheral surfaces. Thereby, the conical valve seat 22 is prevented from falling off from the idle valve body 19.
[0026]
A float presser 20 is attached to the upper surface of the flange 17 a of the guide member 17. The float presser 20 is formed in a disk shape having an outer diameter equal to the outer diameter of the flange 17 a of the guide member 17, and the lower end surface of the outer peripheral side is disposed in contact with the upper surface of the flange 17 a of the guide member 17. An exhaust hole 26 is formed in the center of the float presser 20 so as to penetrate in the vertical direction. In the illustrated example, the exhaust hole 26 has a larger diameter than the exhaust hole 25 of the valve seat retainer 24 and a smaller diameter than the outer diameter of the valve seat retainer 25.
[0027]
Positioning of the float presser 20 with respect to the guide member 17 is performed by a stop member 27 screwed into the upper diameter-enlarged portion 15 c of the second flow hole 15 of the valve body 12. Since the upper enlarged diameter portion 15c of the second flow hole 15 is a screw hole, a stopper member 27 having a screw formed on the outer peripheral surface thereof can be screwed into the screw hole 15c. Thereby, the stop member 27 positions and holds the flange portion 17a of the guide member 17 and the float presser 20. A through hole (exhaust hole) 28 is formed at the center of the stop member 27.
[0028]
The substantially spherical valve body 12 having the above-described configuration is rotated inside the substantially spherical space formed between the valve box 1 and the valve lid 5 or the substantially spherical wall 13 concentrically disposed therein. It is provided so as to be movable. In this embodiment, as shown in FIG. 1, the valve stem 7 is connected in a direction (right side in FIG. 1) perpendicular to both the first flow hole 14 and the second flow hole 15, and the valve rod 7 is rotated. By operating, the valve body 12 can be rotated. In the present embodiment, the valve body 12 can rotate 90 degrees forward and backward between the positions of FIGS. 2 and 3. The valve body 12 is rotated in contact with the packing 11 provided on the valve box 1, the valve lid 5, or the like.
[0029]
That is, the valve rod 7 has one end coupled to the valve body 12 and the other end coupled to the operation rod 30 that extends upward via the operation portion 29. The valve rod 7 and the operation rod 30 are coupled via, for example, a bevel gear 31. The rotation of the operation rod 30 is transmitted to the valve rod 7 via the bevel gear 31 and the valve body 12 is rotated. Note that an O-ring is disposed on the midway outer peripheral surface of the valve stem 7, so that water does not come to the operation unit 29 side.
[0030]
By the way, a base 33 is provided on the upper end portion of the valve lid 5 via an auxiliary member 32, and a lid 34 is detachably provided on the base 33.
[0031]
In the fire hydrant of this embodiment, the flange 3 at the lower end of the valve box 1 is connected to the flange 36 of the repair valve 35 and is connected to the water pipe through the repair valve 35 and the connection pipe. Normally, as shown in FIG. 3, the air valve 16 is arranged on the upper opening side. In that state, water from the lower opening of the valve box 1 enters the first flow hole 14 disposed in the left-right direction via the second flow hole 15 on the lower side wall of the valve body 12, and further It enters into the second flow holes 15 a and 15 b on the upper side wall and is sealed by the valve body 16.
[0032]
That is, as shown in FIG. 4, since the guide member 17 has a plurality of communication holes 21 (21 a to 21 c), water enters the guide member 17. As a result, the float valve body 18 in the guide member 17 is raised by the buoyancy of water, and the upper part of the float valve body 18 is in the state of FIG. 4 with the discharge ports 23 and 25 of the floating valve body 19 closed. Therefore, the outflow of water from the idle valve body 19 to the outside is prevented.
[0033]
Assuming that minute air enters the fire hydrant from the water pipe, the air rises through the second flow hole 15 and enters the guide member 17 through the communication hole 21a at the lower part of the guide member 17 and the like. Move to the top of The air that has risen to the space between the float valve body 18 and the floating valve body 19 pushes the float valve body 18 slightly downward, and the exhaust holes 23 and 25 of the floating valve body 19, the exhaust holes 26 of the float presser 20, and the stop It is discharged to the outside of the fire hydrant through the exhaust hole 28 of the member 27. For example, since the space between the base 33 and the lid 34 is not completely airtight, the air from the stopper member 27 is easily led out to the outside.
[0034]
On the other hand, when a relatively large amount of air enters the fire hydrant, the air valve 16 in the valve body 12 performs quick exhaust. That is, in this case, as shown in FIG. 5, a large amount of air temporarily accumulates on the upper portion of the guide member 17, so that water in the guide member 17 is reduced and the float valve body 18 loses buoyancy. In addition to the downward movement, the floating valve body 19 is also lowered downward due to gravity. In this state, communication holes 21 c and 21 b are arranged on the side surfaces of the guide member 17 at the heights at which the floating valve body 19 is positioned up and down. Accordingly, the air is rapidly exhausted to the outside of the fire hydrant through the communication hole 21 c disposed above the floating valve body 19 and the exhaust hole 26 of the float retainer 20 and the exhaust hole 28 of the stopper member 27.
[0035]
When the air is discharged, water flows into the guide member 17 through the exhaust hole 21b disposed in the lower part of the floating valve body 19 and the exhaust hole 21a formed in the lower surface of the guide member 17, and the buoyancy The float valve body 18 and the floating valve body 19 obtained are lifted and returned to the state shown in FIG.
[0036]
In addition, according to the structure of the said Example, an air valve can be integrated in the range of the limited ball | bowl. And by incorporating an air valve, the air in a pipe | tube can be lose | eliminated, a fire extinguishing activity can be smoothed, and generation | occurrence | production prevention of rust in a pipe | tube can be aimed at. It also prevents air hammers.
[0037]
By the way, when the water pipe side becomes negative pressure, the float valve body 18 (or the floating valve body 19) descends downward from the state of FIG. 4, and the exhaust hole 28 of the stop member 27 and the float presser 20 By sucking outside air through the exhaust hole 26, the negative pressure can be eliminated.
[0038]
Further, when the fire hydrant is used, the valve body 12 may be rotated via the valve rod 7 by rotating the operation rod 30 with the lid 34 removed and a fire hose or the like connected to the base 33. When the valve body 12 is rotated, the first opening hole 14 of the valve body 1 communicates with the upper opening on the valve lid 5 side from the lower opening of the valve box 1 as shown in FIG.
[0039]
By the way, about the ball-type fire hydrant of the said Example, it can replace with the existing ball-type fire hydrant and can be installed. In other words, standard products of the same size are normally used for fire hydrant boxes that are currently used in the ball type, so the ball type that has been conventionally installed in unreserved water works by stopping the repair valve 35 and replacing it. The underground fire hydrant can be a ball-type underground air valve built-in fire hydrant.
[0040]
The air valve built-in ball type fire hydrant of the present invention is not limited to the configuration of each of the above embodiments, and can be changed as appropriate.
For example, the shape of the ball, that is, the valve body 12 can be changed as appropriate. That is, although the case where the substantially spherical valve element 12 is used has been described in the above embodiment, a substantially elliptic strain type valve element may be used. In that case, it goes without saying that the shapes of the valve box 1 and the valve lid 5 are appropriately changed in accordance with the shape of the valve body 12.
[0041]
【The invention's effect】
As described above in detail, according to the ball type fire hydrant with a built-in air valve of the present invention, a fire hydrant is provided that can evacuate the air in the water pipe reliably by incorporating the air valve into the ball type underground fire hydrant with a simple configuration. can do.
[Brief description of the drawings]
FIG. 1 is a view showing an embodiment of a ball type underground fire hydrant with a built-in air valve according to the present invention, and is a front view showing a part of a state in which a valve is opened.
2 is a longitudinal sectional view showing a state in which the valve is opened in the ball-type underground fire hydrant with a built-in air valve of FIG. 1 and viewed from the side.
3 is a vertical cross-sectional view of the ball-type underground fire hydrant with a built-in air valve shown in FIG.
4 is an enlarged view of the air valve portion of the air valve built-in ball type underground fire hydrant of FIG. 1, showing a normal state.
FIG. 5 is an enlarged view of an air valve portion of the air valve built-in ball type underground fire hydrant of FIG. 1, showing a state during rapid exhaust;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Valve box 5 Valve cover 7 Valve rod 12 Valve body 14 1st flow hole 15 2nd flow hole 17 Guide member 18 Float valve body 19 Floating valve body 20 Float presser 21 (21a-21c) Communication holes 23, 25 Exhaust hole 26 Exhaust hole 33 cap

Claims

A valve box penetrating vertically and having a lower opening on the water supply side and an upper opening on the drain side,
A first flow hole is formed in the valve box so as to be rotatable and penetrates in the diametrical direction. The lower opening of the valve box is determined depending on whether or not there is a correspondence between the first flow hole and the upper and lower openings of the valve box. It is possible to open and close the communication from the upper opening to the upper opening, and in the closed state of the communication, the upper and lower side walls arranged toward the upper and lower openings of the valve box are formed through the second circulation hole so as to intersect the first circulation hole. With the valve body
A guide member provided in the second flow hole in the upper side wall of the valve body in the closed state, and having a communication hole formed in the lower end portion and the side surface;
A float valve body housed in the guide member and provided so as to move up and down according to the amount of water in the guide member by floating in water;
The exhaust valve body is accommodated in the guide member in a state of being arranged at the upper portion, can be moved up and down with the float valve body, and an exhaust hole for exhausting the air entering the guide member to the outside is formed. It is possible to open and close the hole by a float valve body, and a floating valve body capable of exhausting air outwardly through the communication hole by descending below the communication hole at the upper side of the guide member. A ball type fire hydrant with a built-in air valve.

Penetrating vertically, a lower opening on the water supply side and an upper opening on the drain side are formed, a valve box provided with a valve lid on the upper opening,
A base provided at the top of the valve lid, to which a fire hose can be connected;
It is made into the substantially spherical shape which the 1st flow hole was penetrated in the diameter direction, and it is provided in the hollow part formed by a valve box and a valve lid so that rotation operation is possible, and a valve lid from the lower opening by the side of a valve box A valve body in which communication with the upper opening on the side can be opened and closed, and in the upper and lower side walls in the closed state of the communication, the second flow hole is formed so as to penetrate in the vertical direction across the first flow hole,
A guide member provided in the second flow hole in the upper side wall of the valve body in the closed state, and having a communication hole formed in the lower end portion and the side surface;
A float valve body housed in the guide member and provided so as to move up and down according to the amount of water in the guide member by floating in water;
The exhaust valve body is accommodated in the guide member in a state of being arranged at the upper portion, can be moved up and down with the float valve body, and an exhaust hole for exhausting the air entering the guide member to the outside is formed. A floating valve body that can be opened and closed by a float valve body, and a floating valve body that is capable of exhausting air outwardly through the communication hole by descending below the communication hole at the upper side of the guide member. A ball type fire hydrant with a built-in air valve.

The first flow hole and the second flow hole are formed to penetrate in a diameter direction of a substantially spherical valve body,
The second flow hole is formed orthogonal to the first flow hole,
The valve body is rotated by a valve rod that is orthogonal to both the first flow hole and the second flow hole and is disposed along the diameter direction of the substantially spherical valve body. An air valve built-in ball type fire hydrant according to claim 1 or claim 2.

The guide member has a substantially cylindrical shape opened upward, and a lower surface of the guide member is formed to bulge downward substantially in a spherical shape. The communication hole is made in
The float valve body is formed in a substantially spherical shape,
The floating valve body has a substantially disk shape slightly smaller than the inner diameter of the guide member, and has an exhaust hole penetrating in the vertical direction in the center portion.
The upper part of the guide member is provided with a float presser that prevents the floating valve body from falling off the guide member.
The ball-type fire hydrant with built-in air valve according to claim 3, wherein an exhaust hole for exhausting the air from the floating valve body or the guide member to the outside is formed at the center of the float presser.