A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
BACKFLOW PREVENTION DEVICE FOR UNDERGROUND STRUCTURE
PROBLEM TO BE SOLVED: To provide a backflow prevention device for an underground structure, the device that can prevent back blow in the conduit of an underground structure without a restriction of an installation location and without using a flexible elastic member of a complex and special shape as a check valve body.SOLUTION: A flexible elastic board 10 having flexibility and elasticity and having a substantially rectangular shape when expanded is used as a check valve body. This flexible elastic board 10 is disposed so that one side 12 of the downstream side in the flow direction of a conduit 20 of an underground structure may conform in an inner circumferential surface of the lower side of the conduit 20. Also, the flexible elastic board functions as a check valve body by that two sides of 13, 13 along the flow direction of the conduit are fixed to the inner circumferential surface of the conduit 20, and one side 11 of the upstream side in the flow direction of the conduit is fixed to the inner circumferential surface of the upper side of the conduit 20.SELECTED DRAWING: Figure 3
【課題】設置場所の制約がなく、また、逆止弁体として複雑かつ特殊な形状の可撓性弾性部材を用いることなく、地下構造物の管路における逆流を防止することのできる地下構造物用の逆流防止装置を提供する。【解決手段】逆止弁体として、可撓性および弾性を有し、かつ展開したときの形状が略矩形状である可撓性弾性板１０を用いる。この可撓性弾性板１０は、地下構造物の管路２０の流れ方向の下流側の１辺１２が管路２０の下側の内周面に沿うように配置されるとともに、管路の流れ方向に沿う２辺１３，１３が管路２０の内周面に対して固定され、管路の流れ方向の上流側の１辺１１が管路２０の上側の内周面に対して固定されることで、逆止弁体として機能する。【選択図】図３
BACKFLOW PREVENTION DEVICE FOR UNDERGROUND STRUCTURE
PROBLEM TO BE SOLVED: To provide a backflow prevention device for an underground structure, the device that can prevent back blow in the conduit of an underground structure without a restriction of an installation location and without using a flexible elastic member of a complex and special shape as a check valve body.SOLUTION: A flexible elastic board 10 having flexibility and elasticity and having a substantially rectangular shape when expanded is used as a check valve body. This flexible elastic board 10 is disposed so that one side 12 of the downstream side in the flow direction of a conduit 20 of an underground structure may conform in an inner circumferential surface of the lower side of the conduit 20. Also, the flexible elastic board functions as a check valve body by that two sides of 13, 13 along the flow direction of the conduit are fixed to the inner circumferential surface of the conduit 20, and one side 11 of the upstream side in the flow direction of the conduit is fixed to the inner circumferential surface of the upper side of the conduit 20.SELECTED DRAWING: Figure 3
【課題】設置場所の制約がなく、また、逆止弁体として複雑かつ特殊な形状の可撓性弾性部材を用いることなく、地下構造物の管路における逆流を防止することのできる地下構造物用の逆流防止装置を提供する。【解決手段】逆止弁体として、可撓性および弾性を有し、かつ展開したときの形状が略矩形状である可撓性弾性板１０を用いる。この可撓性弾性板１０は、地下構造物の管路２０の流れ方向の下流側の１辺１２が管路２０の下側の内周面に沿うように配置されるとともに、管路の流れ方向に沿う２辺１３，１３が管路２０の内周面に対して固定され、管路の流れ方向の上流側の１辺１１が管路２０の上側の内周面に対して固定されることで、逆止弁体として機能する。【選択図】図３
BACKFLOW PREVENTION DEVICE FOR UNDERGROUND STRUCTURE
地下構造物用の逆流防止装置
TSUCHIYA TOSHIO (author) / UMEMOTO OSAMU (author) / KUROBANE YOSHIO (author)
2017-02-02
Patent
Electronic Resource
Japanese
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