Page 125 - 《水资源与水工程学报》2023年第1期
P. 125
!34 " ! 1 # & ' ( ) & * + , - Vol.34No.1
2023 $ 2 % JournalofWaterResources&WaterEngineering Feb.,2023
DOI:10.11705/j.issn.1672-643X.2023.01.14
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FGHIJ:TV674 KLMNO:A KPQJ:1672643X(2023)01012106
Calculationandpreventionofwaterhammerforlongdistance
gravityflowwaterconveyancepipelines
2
2
1,4
3
3
ZHANGLei ,LIMing,TONGJiyou,ZHANGHaili,WANGYong,HAOBojin 1,4
(1.YellowRiverInstituteofHydraulicResearch,YellowRiverConservancyCommissionoftheMinistryofWaterResources,Zhengzhou
450003,China;2.ResearchCenterofFluidMachineryEngineeringandTechnology,JiangsuUniversity,Zhenjiang212013,China;
3.HingganLeagueHehaiWaterSupplyCo.,Ltd.,Ulanhot137400,China;4.HenanEngineeringResearchCenterof
HydropowerEngineeringAbrasionTestingandProtection,Zhengzhou450003,China)
Abstract:Inordertofurtherstudythewaterhammerphenomenoninlongdistancegravityflowwater
conveyancepipelines,theindustrialwatersupplyprojectinHingganLeagueEconomicandTechnological
DevelopmentZonewastakenastheresearchobjecttostudytheinfluenceoftwostagelinearclosingspeed
andcombinedvalveclosingschemesonthewaterhammerinthelongdistancegravityflowwaterconvey
ancepipeline ,accordingtothebasicprincipleofonedimensionalwaterhammercalculation.Onthisba
sis ,theinfluenceoftotalvalveclosingtimeonpipelinewaterhammerpressurewasstudied.Theresults
indicatethatthewaterhammerpressurealongthepipelineincreaseswiththeincreaseoftheopeningof
therapidclosingvalveinthefirststage;whenthevalvesareclosedatthesametime,thewaterhammer
pressureofthepipelineislarge,andwhenthevalvesareclosedalternately,thewaterhammerpressureis
relativelysmall ;prolongingthetotalvalveclosingtimeisconducivetoreducingthewaterhammerpres
sureofthepipeline,andtheoptimaldurationfortwostagelinearclosingoftheprojectis1,400s.The
studyhasacertainguidingvalueforthesafeoperationoflongdistancegravityflowwaterconveyance
pipelines.
Keywords:longdistancegravityflow;waterconveyancepipeline;valveclosingwaterhammer;linear
valveclosing ;combinedvalveclosingscheme;waterhammerprevention
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