强潮河口排涝泵站特征扬程确定及水泵选型对策.pdf

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1、水利水电技术第47卷2016年第9期强潮河口排涝泵站特征扬程确定及水泵选型对策王巧红(杭州市水利规划设计研究院，浙江杭州310014)摘要：强潮河口排涝泵站由于外江水位变动大，运行扬程范围宽，导致水泵选型困难。本文通过对规范规定的感潮河段泵站扬程取用规定和工程实际取用情况的对比分析，认为在强潮河12按规范规定的方式确定泵站特征扬程并据此选定水泵，运行时遇强潮需关机停泵，可能错过最佳排涝时机，加重城市内涝。对运行扬程范围较大的泵站，理论上采用变频调速技术可以很好地解决水泵对扬程变化的适应性。但由于高压变频设备价格昂贵，制约了变频调速技术在排涝泵站中的应用。提出在确定强

2、潮河口排涝泵站特征扬程时应合理分析内外水位组合出现的概率，缩小泵站运行扬程范围，方便水泵的选型。如果还是无法解决，可通过设置两种不同扬程水泵组合及人为抬高出水池水位的方式来保证泵站的安全高效运行。关键词：强潮河口；外江；泵站；最高运行水位；特征扬程；运行范围doi：10．13928／j．cnki．Wl'alle．2016．09．014中图分类号：TV675文献标识码：B文章编号：1000．0860(2016)09．0070．05Determinationofcharacteristicheadofdrainagepumpingstationatmacro-tidal

3、estuaryandcountermeasureforitspumptypeselectionWANGQiaohong(HangzhouWaterConservancyPlanningDesignandResearchInstitute，Hangzhou310014，Zhejiang，China)Abstract：Forthedrainagepumpingstationlocatedatmacro-tidalestuary，thetype-selectionofthepumpisdifficultduetothelargefluctuationoftheouterr

4、iverwaterlevelandthewideareaofitsoperationhead．Throughacomparativeanalysismadehereinbetweentheprovisiondefinedintherelevantcriteriaforthepumpingheadofthepumpingstationlocatedatthetidalriverreachandtheadoptionfortheactualproject，itisconsideredthatifdeterminingthecharacteristicheadforapu

5、mpingstationlocatedatmacro·tidalestuaryandthenselectingthepumponthebasisofthis，thepumpmustbeshutdownduringtheoperationwhenen-counteringastrongtide，thusthebestdrainageopportunityispossiblytobemissed，andtheurbanwatefloggingisthentobeag-gravatedaswell．Forthepumpingstationwithalargerrangeo

6、foperationhead，theproblemoftheadaptabilityofpumptothevariationofthepumpinglleadCanbetheoreticallybettersolvedwiththevariable—frequencyspeed—regulationtechnology．Howev-er，theapplicationofthevariable-frequencyspeed·regulationtechnologytodrainagepumpingstationisrestrictedduetoahigherprice

7、oftheequipment．Itissuggestedthattheprobabilityoftheoccurrenceofthecombinationoftheinnerandouterriverwaterlevelsistobereasonably越阻Iyzedwhendeterminingthecharacteristicheadofthedrainagepumpingstationlocatedatthenlaero—tidalestuary，SOastoreducetherangeoftheoperationheadofthepumpingstati