Article(id=1223202685634068750, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223202678788965355, articleNumber=null, orderNo=null, doi=10.20040/j.cnki.1000-7709.2023.20231146, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1689004800000, receivedDateStr=2023-07-11, revisedDate=1690646400000, revisedDateStr=2023-07-30, acceptedDate=null, acceptedDateStr=null, onlineDate=1769563846262, onlineDateStr=2026-01-28, pubDate=1703433600000, pubDateStr=2023-12-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1769563846262, onlineIssueDateStr=2026-01-28, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1769563846262, creator=13701087609, updateTime=1769563846262, updator=13701087609, issue=Issue{id=1223202678788965355, tenantId=1146029695717560320, journalId=1205116964453384197, year='2023', volume='41', issue='12', pageStart='1', pageEnd='228', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1769563844630, creator=13701087609, updateTime=1769563913308, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1223202966899901286, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223202678788965355, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1223202966899901287, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223202678788965355, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=105, endPage=108, ext={EN=ArticleExt(id=1223202686074470718, articleId=1223202685634068750, tenantId=1146029695717560320, journalId=1205116964453384197, language=EN, title=Water Hammer Prevention of Floating Pumping Station Water-conveying System Under Large Range Variable Water Source Level, columnId=1222925283779400191, journalTitle=Water Resources and Power, columnName=WATER CONSERVANCY AND HYDROPOWER ENGINEERING, runingTitle=null, highlight=null, articleAbstract=

For the pump-stopping water hammer prevention of the floating pumping station water-conveying system, in addition to ensuring the safety of the pump unit and the pipeline, the impact of the water hammer pressure on the movable rocker pipe and the floating boat should be considered to ensure the stability of the floating boat. The numerical simulation of the pump-stopping transient of a floating pumping station water-conveying system under large range variable water source level was conducted. The results show that the lowest inlet water level is the most unfavorable condition for water hammer prevention. Under the condition that the pump outlet valve refuses to close, if the unit’s reverse speed exceeds the standard and the maximum reverse flow is reached within 3 s after the pump-stopping. The axial-flow check valve is recommended for the pump outlet valve considering the valve driving capacity requirements, the unit reverse speed and water hammer pressure. In the water hammer protection scheme of "pump outlet axial-flow check valve + air chamber on shore + intermediate check valve + hammer-prevention air valve", the axial-flow check valve ensures that the pump unit does not reverse, the air chamber and air valve reduce the maximum water hammer pressure and improve the negative pressure condition in the pipeline, and the intermediate check valve reduces the pressure oscillation amplitude and oscillation time in the pump outlet and rocker pipe. Therefore, the water hammer prevention problem in the floating pumping station water-conveying system is effectively solved.

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浮船泵站输水系统的停泵水锤防护除了需保证机组和输水管道安全外，还要考虑水锤压力对活动摇臂和浮船的冲击，保证浮船稳定。对云南省某大变幅浮船泵站输水系统的停泵过渡过程进行数值模拟研究。结果表明，最低进水位工况为水锤防护的最不利工况；泵出口阀拒动条件下，若机组倒转转速超标且在停泵后3 s内即达到最大倒泄流量，综合考虑阀门驱动能力需求、机组倒转转速和水锤压力，泵出口阀推荐采用轴流式止回阀；在“泵出口轴流式止回阀+岸上空气罐+中间止回阀+防水锤空气阀”的水锤防护方案中，轴流式止回阀保证机组不倒转，空气罐和防水锤型空气阀降低了输水管道内的最大水锤压力并改善了负压状况，中间止回阀减小了水泵出口和摇臂段的压力振荡幅度和振荡时间，有效解决了该浮船输水系统的停泵水锤防护问题。

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闫黎黎（1982-），女，高级工程师，研究方向为水利水电动力工程，E-mail：yllzws@126.com

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闫黎黎（1982-），女，高级工程师，研究方向为水利水电动力工程，E-mail：yllzws@126.com

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