@article{oai:muroran-it.repo.nii.ac.jp:00006090,
 author = {溝端,  一秀 and MIZOBATA, Kazuhide and 杉山,  弘 and SUGIYAMA, Hiromu and 大谷, 清伸 and OHTANI, Kiyonobu and 大石, 聖史 and OHISHI, Takashi and 佐々木, 悠二 and SASAKI, Yuji and 武者, 裕之 and MUSHA	, Hiroyuki and 三輪, 俊夫 and MIWA, Toshio},
 issue = {672},
 journal = {日本機械学会論文集. B編},
 month = {Aug},
 note = {application/pdf, Check valves for checking reverse water flows in drainage systems sometimes make large impacts through their sudden closure caused by accidental cutoff of drain pumps. In order to characterize such phenomena and to find design criteria for impactless check valves, we observed the motion of a check valve and measured its impact acceleration and pressures in the drainage pipe, using a subscale drainage system. Two peaks of impact acceleration were observed; The first one seemed due to collision of the check valve and the valve seat, whereas the second one did due to water column separation and recombination caused by the low pressure during the closure state of the valve. The former can be reduced by adding mass to the check valve and by setting an appropriate valve-seat angle. The latter possibly can be reduced by relaxing the low pressure during the closure. Subsequently, the check valve opened through the water-column recombination impacts and sometimes showed opening-closing oscillation.},
 pages = {2225--2231},
 title = {排水ポンプ用逆流防止弁の動特性},
 volume = {68},
 year = {2002},
 yomi = {ミゾバタ, カズヒデ and スギヤマ, ヒロム and オオタニ, キヨノブ and オオイシ, タカシ and ササキ, ユウジ and ムシャ	, ヒロユキ and ミワ, トシオ}
}