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:1672643X(2023)01012106

                       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
                 DevelopmentZonewastakenastheresearchobjecttostudytheinfluenceoftwostagelinearclosingspeed
                 andcombinedvalveclosingschemesonthewaterhammerinthelongdistancegravityflowwaterconvey
                 ancepipeline ,accordingtothebasicprincipleofonedimensionalwaterhammercalculation.Onthisba
                 sis ,theinfluenceoftotalvalveclosingtimeonpipelinewaterhammerpressurewasstudied.Theresults
                 indicatethatthewaterhammerpressurealongthepipelineincreaseswiththeincreaseoftheopeningof
                 therapidclosingvalveinthefirststage;whenthevalvesareclosedatthesametime,thewaterhammer
                 pressureofthepipelineislarge,andwhenthevalvesareclosedalternately,thewaterhammerpressureis
                 relativelysmall ;prolongingthetotalvalveclosingtimeisconducivetoreducingthewaterhammerpres
                 sureofthepipeline,andtheoptimaldurationfortwostagelinearclosingoftheprojectis1,400s.The
                 studyhasacertainguidingvalueforthesafeoperationoflongdistancegravityflowwaterconveyance
                 pipelines.
                 Keywords:longdistancegravityflow;waterconveyancepipeline;valveclosingwaterhammer;linear
                 valveclosing ;combinedvalveclosingscheme;waterhammerprevention



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