Khangela iivalvuzifakwe ngokubanzi kumbhobho ukunqanda ukubuya umva.Ivalve yokukhangela ngokusisiseko i-valve yendlela enye, ukuhamba kunokuhamba ngokukhululekileyo kwicala elinye, kodwa ukuba i-valve iyajikeleza, ivalve iya kuvalwa ukukhusela umbhobho, ezinye iivalve, iimpompo, njl. ivalve ayifakwanga, ihamile yamanzi inokwenzeka.Ihamile yamanzi isoloko isenzeka ngamandla agqithisileyo kwaye inokonakalisa ngokulula imibhobho okanye iinxalenye.
Izinto ekufuneka uziqwalasele xa ukhetha i-valve yokukhangela
Xa ukhetha i-valve yokukhangela, kubalulekile ukwenza uhlalutyo lweendleko-inzuzo yenkqubo ethile.Ugxininiso oluqhelekileyo kukunciphisa iindleko ngelixa ufumana ilahleko ephantsi yoxinzelelo olunokwenzeka, kodwa kwiivalve zokutshekisha, ukhuseleko oluphezulu lulingana nokulahlekelwa koxinzelelo oluphezulu.Ngoko ke, ukwenzela ukuba kuqinisekiswe inkqubo yokukhusela i-valve yokutshekisha, inkqubo nganye kufuneka ihlolwe ngokwahlukileyo, kwaye izinto ezinjengomngcipheko wesando samanzi, ukulahleka koxinzelelo olwamkelekileyo, kunye nemiphumo yezemali yokufaka i-valve yokuhlola kufuneka ithathelwe ingqalelo kwihamile yamanzi.
Ukuze ukwazi ukukhetha ivalve echanekileyo yokukhangela kwisicelo sakho, kukho iindlela ezininzi zokukhetha omele uziqwalasele.Okokuqala, akukho lunye uhlobo lwe-valve yokutshekisha lolona khetho lungcono kuzo zonke izicelo, kwaye imilinganiselo yokukhetha ayibalulekanga ngokulinganayo kuzo zonke iimeko.
Ezinye iikhrayitheriya zokukhetha zokuqwalasela xa ukhetha ivalve yokukhangela
Ezinye izinto onokuthi uziqwalasele kukuhambelana kwamanzi, iimpawu zokuqukuqela, ukulahleka kwentloko, iimpawu ezingezizo iimpembelelo, kunye neendleko zizonke zobunini.Ukuze ufumane ukusebenza kakuhle, ngokuqinisekileyo kubalulekile ukukhetha ivalve ngokweempawu zeendlela ezahlukeneyo zokufakela.
Ulwelo
Zonke iivalvu zokuhlola zisetyenziselwa ukunyanga amanzi kunye nokucocwa kwamanzi amdaka, kodwa ukucocwa kwamanzi amdaka akrwada/ugutyulo kunokubangela iingxaki ezithile.Xa ukhetha iivalvu zolu lwelo, kuya kufuneka ucinge ukuba ubukho bezinto eziqinileyo zinokuchaphazela njani ukusebenza kwevalvu.
Iimpawu zokuhamba
Ukuba i-valve yokutshekisha ivala ngokukhawuleza, kunokwenzeka ukukhusela i-slamming.Nangona kunjalo, ukuvala ngokukhawuleza akuthinteli ukunyuka okwenzekayo xa ipompo iqala kwaye ivaliwe.Ukuba i-valve ivula (kwaye ivale) ngokukhawuleza, izinga lokuhamba liya kutshintsha ngokukhawuleza kwaye ukuqhuma kunokwenzeka ngakumbi.
Ilahleko yentloko
Ukulahleka kwentloko yeValve ngumsebenzi wesantya solwelo.Ukulahleka kwentloko ye-valve kuchaphazeleka yimeko yokuhamba kwenkqubo kunye nomgangatho wangaphakathi wevalve.Ijometri yomzimba wevalve kunye noyilo lokuvala lumisela indawo yokuhamba ngevalve kwaye ngoko ke ikwachaphazela ilahleko yentloko.
Ilahleko yentloko ekufuneka iqwalaselwe kukudityaniswa kwentloko engatshintshiyo (ebangelwa ngumahluko wobude) kunye nentloko ye-friction (ebangelwa ngumbhobho kunye ne-valve yangaphakathi).Kwesi siseko, zininzi iifomyula zevalve headloss kunye nexabiso elilinganisiweyo.Eyona nto ixhaphakileyo ingaba yi-coefficient yokuhamba komthamo wamanzi adlula kwi-valve kunye nokuhla koxinzelelo oluthile kwixesha elithile.Kodwa xa kuthelekiswa, kucingwa ukuba resistivity Kv lolona khetho lungcono.
Ixabiso lilonke lobunini
Iindleko zesivalo sakho sokutshekisha zingabandakanya ngaphezulu kwexabiso lokuthenga.Kolunye ufakelo, ezona ndleko zibalulekileyo mhlawumbi zinokuthenga kunye nofakelo, kodwa kwezinye iimeko, ugcino okanye iindleko zamandla zinokubaluleka okanye zibaluleke ngakumbi.Xa usebenzisa indleko njengekhrayitheriya yokukhetha ivalve yokutshekisha, ixabiso lilonke kubomi bevalvu kufuneka ngoko liqwalaselwe.Ngokubanzi, i-valve ilula, iyancipha iimfuno zokulondoloza.
Iimpawu ze-non-slam
Khangela ivalvei-slam ibangela ukuba uxinzelelo lwenkqubo luguquguquke.Isinyathelo sokuqala kule nkqubo kukubuyisela umva ukuhamba xa ipompo iyeka.Oku kunokubangela ukubuya umva kwivalve phambi kokuba ivalve ifike kwindawo evalwe ngokupheleleyo.Emva koko i-reverse flow ivaliwe, kwaye utshintsho kwizinga lokuhamba luguqula amandla e-kinetic olwelo lube luxinzelelo.
I-slam ivakala njengesandi esenziweyo xa idiski okanye ibhola yevalve yokutshekisha ibetha isihlalo sevalvu, kwaye ivelisa ingxolo enkulu.Nangona kunjalo, esi sandi asibangelwa kukuvalwa komzimba, kodwa ngamaza omsindo avela kwii-spikes zoxinzelelo ezolula udonga lwetyhubhu.Ukuze ugweme ukubetha ngokupheleleyo, ivalve yokutshekisha kufuneka ivalwe ngaphambi kokuba kwenzeke nayiphi na isantya esibuyela umva.Ngelishwa, oku akuzange kwenzeke.Ijiyometri yevalve imisela ukuba kungakanani umva okuya kwenzeka, ngoko ke ivalve ivaleka ngokukhawuleza, kokukhona ukubetha kancinci.
Ixesha lokuposa: May-14-2021
