Ukukhethwa kwe-valve yesistimu yokugcina iqhwa Uyazi ukuthi yiziphi izinto zokuvala ama-valve? Yiziphi izici zempahla yokuvala?
Ukukhetha ama-valve kufanele kunake inkinga:
(1) i-valve yokulawula kagesi, ukusebenza kokuvalwa kwe-valve kufanele kuqine ngenqubo yokuqhwa nokuncibilika, uhlangothi lwe-ethylene glycol esigabeni esithile luzosebenza ku-2.19 ℃ / 5.56 ℃ izinga lokushisa, ngakolunye uhlangothi lwepuleti endaweni ebandayo. amanzi ngo-12 ℃, 7 ℃ / ngokuvamile agijima, uma ibhodi ohlangothini lwe-ethylene glycol livalekile ukuvuza, kuzobangela ipuleti emanzini ayiqhwa ukuthi libe yiqhwa ngakolunye uhlangothi, Imishini yokuqhwaza Yiqhwa.
(2) Ivalvu yokuhlola kanye ne-bypass valve kufanele kusethwe nhlangothi zombili zevalvu kagesi; Okokugcina uhlelo, nokusebenza ngezandla.
I-valve kagesi kufanele ibe nedivayisi yokulungisa eyenziwe ngesandla.
Uyazi ukuthi yiziphi izinto zokuvala ama-valve? Yiziphi izici zempahla yokuvala?
Isimiso sokuvala ama-valve
Ukubeka uphawu ukuvimbela ukuvuza, ngakho-ke umgomo wokuvala ama-valve nawo usuka ekuvimbeleni ucwaningo lokuvuza. Kunezici ezimbili eziyinhloko ezibangela ukuvuza. Esinye isici esiyinhloko esithinta ukusebenza kokuvala, okungukuthi, kukhona igebe phakathi kwepheya evalayo, kanti enye kunomehluko wengcindezi phakathi kwezinhlangothi ezimbili zokuvala. Umgomo wokuvala ama-valve nawo usuka ekuvaleni uketshezi, ukuvalwa kwegesi, umgomo wokuvuza kokuvalwa kwama-valve kanye nezinye izici ezine okufanele zihlaziywe.
01 Ukuqina koketshezi
Ukuqina koketshezi kunqunywa yi-viscosity yalo kanye nokuqina kwendawo. Lapho i-valve evuzayo ye-capillary igcwele igesi, ukungezwani kwendawo kungase kuxoshe noma kudonsele uketshezi ku-capillary. Futhi lokho kwakha i-Angle e-tangent. Lapho i-Tangent Angle ingaphansi kwama-90, uketshezi lujova eshubhu le-capillary futhi ukuvuza kwenzeka. Isizathu sokuvuza sisezicini ezihlukahlukene ze-medium. Ukuhlola ngemidiya ehlukene, ngaphansi kwesimo esifanayo, kuzothola imiphumela ehlukene. Ungasebenzisa amanzi, umoya, uphalafini, njll. Uma i-tangent Angle ingaphezu kuka-90, ukuvuza nakho kuzokwenzeka. Ngenxa yobuhlobo namafutha noma ifilimu ye-wax ebusweni bensimbi. Uma lawa mafilimu angaphezulu esencibilikisiwe, izici zobuso bensimbi ziyashintsha, futhi uketshezi, olwaluxoshiwe ngaphambili, luzomanzisa indawo futhi luvuze. Ngenxa yalesi simo esingenhla, ngokusho kwefomula kaPoisson, inhloso yokuvimbela ukuvuza noma ukunciphisa ukuvuza ingabonakala ngaphansi kwesimo sokunciphisa ububanzi be-capillary kanye ne-viscosity ephakathi.
2 Ukuqina kwegesi
Ngokusho kwefomula kaPoisson, ukuqina kwegesi kuhlobene nama-molecule egesi kanye ne-viscosity yegesi. Ukuvuza kuhambisana ngokuphambene nobude be-capillary kanye ne-viscosity yegesi, futhi ngokulingana nobubanzi be-capillary namandla okushayela. Lapho ububanzi be-capillary kanye namazinga ajwayelekile enkululeko yama-molecule egesi afana, ama-molecule egesi azogeleza ku-capillary ngokunyakaza kwamahhala okushisayo. Ngakho-ke, lapho senza ukuhlolwa kokuvalwa kwe-valve, okuphakathi kufanele kube ngamanzi ukudlala indima yokuvala, ngomoya noma igesi ayikwazi ukudlala indima yokuvala. Ngisho noma sinciphisa ububanzi be-capillary ngaphansi kwe-molecule yegesi ngokuguqulwa kwepulasitiki, ukugeleza kwegesi akukwazi ukumiswa. Isizathu siwukuthi igesi isengasakaza ezindongeni zensimbi. Ngakho-ke lapho senza ukuhlolwa kwegesi, kufanele siqine kakhulu kunokuhlola uketshezi.
3 Umgomo wokuvala wesiteshi sokuvuza
Isivalo se-valve sakhiwe izingxenye ezimbili, ubuhhadlahhadla, obakhiwe ubulukhuni bokungalingani okusabalele endaweni ye-waveform kanye nokubanda kwebanga phakathi kweziqongo. Ngaphansi kwesimo sokuthi amandla okunwebeka ezinto eziningi zensimbi aphansi ezweni lethu, sidinga ukuphakamisa izidingo eziphakeme zamandla okucindezela izinto zensimbi, okungukuthi, amandla okucindezela wezinto ezibonakalayo kufanele adlule ukunwebeka kwawo, uma sifuna ukufeza isimo sokufaka uphawu. Ngakho-ke, ekwakhiweni kwe-valve, umbhangqwana ovala uphawu ohlangene nomehluko othile wobunzima ukuze ufanise, ngaphansi kwesenzo sokucindezela, uzokhiqiza izinga elithile lomphumela wokuvala ukuguqulwa kwepulasitiki. Uma indawo yokubeka uphawu iyinto yensimbi, khona-ke ingaphezulu lephuzu le-convex elingalingani lizovela kusenesikhathi, ekuqaleni kuphela ngomthwalo omncane kungenza lezi zingxenye zepulasitiki ze-convex zingalingani. Lapho indawo yokuxhumana ikhula, ukungalingani kwendawo kuzoba yipulasitiki - i-elastic deformation. Khona-ke ubulukhuni bezindawo ezimbili endaweni eyi-concave buyoba khona. Lezi zindlela ezisele zingenziwa ukuze zilingane lapho umthwalo obangela ukuwohloka okukhulu kwepulasitiki yezinto ezingaphansi kusetshenziswa futhi izindawo ezimbili zisondelene, eduze komugqa oqhubekayo futhi ohlangothini lwendandatho.
4. Ipheya yokuvala i-valve
I-valve seal pair ingxenye yesihlalo se-valve kanye nokuvala okuvala lapho zixhumene. Indawo yokubeka uphawu yensimbi ijwayele ukulimala kusuka ku-clamping media, ukugqwala kwemidiya, izinhlayiya zokugqoka, i-cavitation kanye nokuguguleka ngesikhathi sokusetshenziswa. Njengokugqoka izinhlayiya. Uma izinhlayiya ezigqokile zizincane kunobunzima obungaphezulu, ukunemba kwendawo kuzothuthukiswa lapho indawo yokuvala ifakwa, futhi ngeke yonakale. Ngokuphambene nalokho, kuzokwenza ukunemba kwendawo kube kubi nakakhulu. Ngakho-ke, ekukhethweni kwezinhlayiya zokugqoka, izinto ezibonakalayo, isimo sokusebenza, i-lubricity kanye nokugqwala kwendawo yokubeka uphawu kufanele kucatshangelwe ngokugcwele. Njengezinhlayiya zokugqoka, lapho sikhetha izimpawu, kufanele sicabangele ngokucophelela izici ezihlukahlukene ezithinta ukusebenza kwazo ukuze sidlale umsebenzi wokuvimbela ukuvuza. Ngakho-ke, izinto ezimelana nokugqwala, ukuhuzuka nokuguguleka kufanele kukhethwe. Uma kungenjalo, ukuntuleka kwanoma iyiphi enye yezidingo kuzokwenza ukusebenza kwayo kokubeka uphawu ** kwehliswe.
2. Izici eziyinhloko ezithinta uphawu lwe-valve
Kunezici eziningi ezithinta uphawu lwe-valve, ikakhulukazi okulandelayo:
Isikhathi sokuthumela: Aug-06-2022
