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A platform for research: civil engineering, architecture and urbanism
CHECK VALVE
To provide a check valve for catch basin that can prevent only a reverse flow of drain water surely without causing a clogging of a drain passage due to a foreign material.SOLUTION: A check valve for catch basin comprises: a flange part that has an opening communicating with an inflow port of a catch basin and that is attached to an internal surface of the catch basin; a valve tube that communicates with the opening and is supported by the flange part and that has an opening end on the downstream formed to be inclined from the downstream to the upstream as it goes from an upper part to a lower part; and a valve body that is pivoted to the upper end part of the opening end swingably so as to open and close the opening end of the valve tube and that has a surface on the downstream recessed toward the upstream and that has a buoyancy generation part smaller than the specific gravity of water. The buoyancy generation part is arranged above the height half of the height of the valve body in the vertical direction and on the upstream of a vertical plane passing through the swing shaft of the valve body when the valve body is suspended from the upper end part.SELECTED DRAWING: Figure 4
【課題】異物などによる排水詰まりを生じることがなく、逆フローの排水の流れのみを確実に防止することができる排水ます用逆流防止弁を提供する。【解決手段】本発明によれば、排水ますの流入口と連通させる開口部を有し排水ますの内壁面に取り付けられるフランジ部と、前記開口部と連通し前記フランジ部により支持されており、下流側の開口端は上部から下部へ向かうにつれて下流側から上流側へ向けて傾斜するように形成されている前記弁管と、前記弁管の前記開口端を開閉するために前記開口端の上部端部に揺動自在に軸支され、下流側の表面が上流側へ向けて凹んでいる弁体であって、前記弁体を前記上部端部に吊り下げた時、鉛直方向における前記弁体の高さの半分の高さの位置よりも上方で且つ前記弁体の揺動軸を通る鉛直面よりも上流側に配置される水の比重よりも小さな浮力発生部を有している前記弁体を備えている排水ます用逆流防止弁が提供される。【選択図】 図４
CHECK VALVE
To provide a check valve for catch basin that can prevent only a reverse flow of drain water surely without causing a clogging of a drain passage due to a foreign material.SOLUTION: A check valve for catch basin comprises: a flange part that has an opening communicating with an inflow port of a catch basin and that is attached to an internal surface of the catch basin; a valve tube that communicates with the opening and is supported by the flange part and that has an opening end on the downstream formed to be inclined from the downstream to the upstream as it goes from an upper part to a lower part; and a valve body that is pivoted to the upper end part of the opening end swingably so as to open and close the opening end of the valve tube and that has a surface on the downstream recessed toward the upstream and that has a buoyancy generation part smaller than the specific gravity of water. The buoyancy generation part is arranged above the height half of the height of the valve body in the vertical direction and on the upstream of a vertical plane passing through the swing shaft of the valve body when the valve body is suspended from the upper end part.SELECTED DRAWING: Figure 4
【課題】異物などによる排水詰まりを生じることがなく、逆フローの排水の流れのみを確実に防止することができる排水ます用逆流防止弁を提供する。【解決手段】本発明によれば、排水ますの流入口と連通させる開口部を有し排水ますの内壁面に取り付けられるフランジ部と、前記開口部と連通し前記フランジ部により支持されており、下流側の開口端は上部から下部へ向かうにつれて下流側から上流側へ向けて傾斜するように形成されている前記弁管と、前記弁管の前記開口端を開閉するために前記開口端の上部端部に揺動自在に軸支され、下流側の表面が上流側へ向けて凹んでいる弁体であって、前記弁体を前記上部端部に吊り下げた時、鉛直方向における前記弁体の高さの半分の高さの位置よりも上方で且つ前記弁体の揺動軸を通る鉛直面よりも上流側に配置される水の比重よりも小さな浮力発生部を有している前記弁体を備えている排水ます用逆流防止弁が提供される。【選択図】 図４
CHECK VALVE
逆流防止弁
OKAMOTO AKIRA (author) / MIZUNO HIROTOSHI (author) / HASHIZUME MINORU (author)
2018-12-27
Patent
Electronic Resource
Japanese