Ivaluvu Yesango: Ivalvu yesango ivalvu esebenzisa isango (ipuleti lesango) ukuze lihambe liqonde eksisi yephaseji.Ngokuyinhloko isetshenziselwa amapayipi ukuhlukanisa okuphakathi, okungukuthi, evulekile ngokugcwele noma evalwe ngokugcwele.Ngokuvamile, ama-valve esango awafanele ukulawulwa kokugeleza.Zingasetshenziselwa kokubili izinga lokushisa eliphansi kanye nokushisa okuphezulu nokucindezela izicelo, kuye ngokuthi i-valve impahla.
Kodwa-ke, ama-valve esango ngokuvamile awasetshenziswa kumapayipi athutha udaka noma imidiya efanayo.
Izinzuzo:
Ukumelana noketshezi oluphansi.
Idinga i-torque encane ukuvula nokuvala.
Ingasetshenziswa ezinhlelweni zokugeleza okuphindwe kabili, okuvumela okuphakathi ukuthi kugeleze kuzo zombili izinkomba.
Uma ivuleke ngokugcwele, indawo evalayo ayijwayele ukuguguleka endaweni yokusebenza uma iqhathaniswa namavalvu embulunga.
Isakhiwo esilula esinenqubo yokukhiqiza enhle.
Ubude besakhiwo esihlangene.
Ububi:
Kudingeka ubukhulu bayo yonke indawo enkulu nendawo yokufaka.
Ukungqubuzana okuphezulu nokuguga phakathi kwezindawo zokuvala ngesikhathi sokuvula nokuvala, ikakhulukazi emazingeni okushisa aphezulu.
Amavalvu esango ngokuvamile anezindawo ezimbili zokuvala, ezingandisa ubunzima ekucubunguleni, ekugayeni nasekulungiseni.
Isikhathi eside sokuvula nokuvala.
I-Butterfly Valve: I-valve uvemvane ivalvu esebenzisa into yokuvala emise okwediski ukuze ijikeleze cishe ngamadigri angu-90 ukuze ivule, ivale, futhi ilawule ukugeleza koketshezi.
Izinzuzo:
Isakhiwo esilula, usayizi ohlangene, ongasindi, nokusetshenziswa kwempahla ephansi, okuyenza ifanelekele ama-valve anobubanzi obukhulu.
Ukuvula nokuvala okusheshayo ngokumelana nokugeleza okuphansi.
Ingakwazi ukuphatha imidiya enezinhlayiya eziqinile ezimisiwe futhi ingasetshenziselwa imidiya eyimpuphu kanye ne-granular kuye ngamandla wendawo yokuvala.
Ifanele ukuvuleka okuphindwe kabili, ukuvala, nokulawulwa kumapayipi okungenisa umoya kanye nokususa uthuli.Isetshenziswa kakhulu ku-metallurgy, imboni elula, amandla, kanye nezinhlelo ze-petrochemical zamapayipi egesi kanye nemigudu yamanzi.
Ububi:
Ibanga lokulawula ukugeleza okulinganiselwe;lapho i-valve ivuliwe ngo-30%, izinga lokugeleza lizodlula i-95%.
Akufanele kumasistimu wamapayipi okushisa aphezulu kanye nomfutho ophezulu ngenxa yokulinganiselwa esakhiweni nasezintweni zokuvala.Ngokuvamile, isebenza emazingeni okushisa angaphansi kuka-300°C kanye ne-PN40 noma ngaphansi.
Ukusebenza kokuvala okuntekenteke uma kuqhathaniswa namavalvu ebhola namavalvu embulunga, yingakho-ke akulungele ukusetshenziswa okunezidingo zokuvala okuphezulu.
I-Ball Valve: I-valve yebhola itholakala ku-valve yepulaki, futhi isici sayo sokuvala siyindilinga ezungeza ama-degree angama-90 ezungeze i-eksisi ye-axis.i-valveisiqu ukuze kuzuzwe ukuvula nokuvala.I-valve yebhola isetshenziswa ngokuyinhloko kumapayipi ukuvala, ukusabalalisa, nokushintsha indlela yokuhamba.Amavalvu ebhola anezikhala ezimise okuka-V nazo zinamakhono amahle okulawula ukugeleza.
Izinzuzo:
Ukumelana nokugeleza okuncane (cishe uziro).
Ukusetshenziswa okuthembekile kumithombo yezindaba ebolayo kanye noketshezi lwamaphuzu aphansi abilayo njengoba alunamatheli ngesikhathi sokusebenza (ngaphandle kokugcotshwa).
Ifinyelela ukubekwa uphawu okuphelele ngaphakathi kobubanzi obubanzi bengcindezi nezinga lokushisa.
Ukuvula nokuvala ngokushesha, ngezakhiwo ezithile ezinezikhathi zokuvula/zokuvala ezimfishane njengemizuzwana engu-0.05 kuya ku-0.1, ezifanele izinhlelo ezizenzakalelayo kumabhentshi okuhlola angenawo umthelela ngesikhathi sokusebenza.
Ukuma okuzenzakalelayo ezindaweni zomngcele ngento yokuvala ibhola.
Ukuvalwa okuthembekile kuzo zombili izinhlangothi zendlela yokusebenza.
Akukho ukuguguleka kwezindawo ezivalayo ezivela kumidiya wesivinini esikhulu uma zivulwe ngokugcwele noma zivalekile.
Isakhiwo esihlangene nesilula, okwenza kube yisakhiwo sevalvu esifaneleka kakhulu sezinhlelo zemidiya ezisezingeni eliphansi.
Umzimba we-valve we-Symmetrical, ikakhulukazi ezakhiweni ze-valve ezishiselwe, ungamelana nengcindezi evela kumapayipi.
Isici sokuvala singamelana nokuhluka kwengcindezi ephezulu ngesikhathi sokuvala.Amavalvu ebhola ashiselwe ngokugcwele angangcwatshwa ngaphansi komhlaba, kuqinisekiswe ukuthi izingxenye zangaphakathi azigugulwa, nempilo yokusebenza ephezulu yeminyaka engama-30, okuwenza alungele amapayipi kawoyela negesi.
Ububi:
Indandatho eyinhloko yokuvala ye-valve yebhola i-polytetrafluoroethylene (PTFE), engangeni cishe kuwo wonke amakhemikhali futhi enezici eziphelele ezifana ne-coefficient ephansi yokushayisana, ukusebenza okuzinzile, ukumelana nokuguga, ukufaneleka kwebanga lokushisa elibanzi, nokusebenza okuhle kakhulu kokuvala.
Kodwa-ke, izici ezibonakalayo ze-PTFE, okuhlanganisa i-coefficient yayo ephezulu yokunwetshwa, ukuzwela ekugelezeni okubandayo, kanye nokungahambi kahle kwe-thermal, kudinga ukuklanywa kwezigxivizo zezihlalo ukuthi kusekelwe kulezi zici.Ngakho-ke, lapho izinto zokuvala ziba nzima, ukuthembeka kophawu kuphazamiseka.
Ngaphezu kwalokho, i-PTFE inezinga eliphansi lokumelana nezinga lokushisa futhi ingasetshenziswa kuphela ngaphansi kuka-180°C.Ngale kwaleli zinga lokushisa, okokuvala kuzoguga.Uma kucatshangelwa ukusetshenziswa isikhathi eside, ngokuvamile ayisetshenziswa ngaphezu kuka-120°C.
Ukusebenza kwayo okulawulayo kungaphansi kokwevalvu yembulunga, ikakhulukazi amavalvu omoya (noma amavalvu kagesi).
I-Globe Valve: Ibhekisela ku-valve lapho isici sokuvala (i-valve disc) ihamba ngomugqa omaphakathi wesihlalo.Ukuhluka kwe-orifice yesihlalo kuhambisana ngokuqondile nokuhamba kwediski ye-valve.Ngenxa yohambo olufushane lokuvula nokuvala lwalolu hlobo lwe-valve kanye nomsebenzi walo onokwethenjelwa wokuvala, kanye nobuhlobo obulinganayo phakathi kokuhlukahluka kwe-orifice yesihlalo kanye nokuhamba kwe-valve disc, kufanelekile kakhulu ekulawuleni ukugeleza.Ngakho-ke, lolu hlobo lwe-valve luvame ukusetshenziselwa ukuvala, ukuqondisa, kanye nezinhloso zokudonsa.
Izinzuzo:
Phakathi nenqubo yokuvula nokuvala, amandla okungqubuzana phakathi kwediski ye-valve kanye nendawo yokuvala ye-valve yomzimba mancane kunaleyo ye-valve yesango, okwenza ukuthi ingagugi.
Ukuphakama kokuvula ngokuvamile kungu-1/4 kuphela wesiteshi sesihlalo, okwenza kube kuncane kakhulu kune-valve yesango.
Ngokuvamile, kunendawo eyodwa kuphela yokuvala emzimbeni we-valve kanye nediski ye-valve, okwenza kube lula ukuwenza nokulungisa.
Inezinga eliphezulu lokumelana nezinga lokushisa ngenxa yokuthi ukupakisha kuvamise ukuba yingxube ye-asbestos negraphite.Ama-valve e-globe ngokuvamile asetshenziselwa ama-valves e-steam.
Ububi:
Ngenxa yoshintsho endleleni yokugeleza kwe-medium nge-valve, ukumelana nokugeleza okuncane kwe-valve yembulunga kuphakeme kunokwezinye izinhlobo eziningi zamavalvu.
Ngenxa ye-stroke ende, ijubane lokuvula lihamba kancane uma liqhathaniswa ne-valve yebhola.
I-Plug Valve: Ibhekisela ku-valve ejikelezayo enesici sokuvala esisesimweni sesilinda noma ipulaki yekhoni.Ipulaki ye-valve ku-valve yepulaki izungeziswe ngamadigri angu-90 ukuze ixhume noma ihlukanise iphaseji emzimbeni we-valve, kuzuzwe ukuvuleka noma ukuvala kwe-valve.Ukuma kwepulaki ye-valve kungaba yi-cylindrical noma i-conical.Umgomo wayo ufana ne-valve yebhola, eyasungulwa ngokusekelwe ku-valve yepulaki futhi isetshenziswa kakhulu ekuxhashazweni kwenkundla yamafutha kanye nezimboni ze-petrochemical.
I-Safety Valve: Isebenza njengethuluzi lokuvikela ukucindezela ngokweqile emikhunjini enomfutho, okokusebenza, noma amapayipi.Lapho ingcindezi engaphakathi kwempahla, umkhumbi, noma ipayipi idlula inani elivumelekile, ivalvu ivuleka ngokuzenzakalelayo ukuze ikhulule umthamo ogcwele, ivimbele ukwanda okwengeziwe kokucindezela.Lapho ukucindezela kwehla kunani elishiwo, i-valve kufanele ivale ngokuzenzakalelayo ngokushesha ukuze ivikele ukusebenza okuphephile kwemishini, umkhumbi, noma ipayipi.
I-Steam Trap: Ekuthuthweni kwesitimu, umoya ocindezelweyo, neminye imithombo yezindaba, kwakheka amanzi e-condensate.Ukuqinisekisa ukusebenza kahle nokusebenza okuphephile kwedivayisi, kuyadingeka ukukhipha ngesikhathi le midiya engenamsebenzi neyingozi ukuze kugcinwe ukusetshenziswa nokusetshenziswa kwedivayisi.Inemisebenzi elandelayo: (1) Ingakhipha ngokushesha amanzi e-condensate akhiqizwayo.(2) Ivimbela ukuvuza kwesitimu.(3) Iyasusa.
I-Valve Yokunciphisa Ukucindezela: Ivalvu enciphisa ukucindezela kokungena kungcindezi oyifunayo ngokulungisa futhi incike emandleni omthombo ngokwawo ukuze kugcinwe ngokuzenzakalelayo ukucindezela kokuphuma okuzinzile.
Hlola Valve: Eyaziwa nangokuthi i-valve engabuyi, i-backflow preventer, i-back pressure valve, noma i-valve yendlela eyodwa.Lawa ma-valve avuleka futhi avalwe ngokuzenzakalelayo amandla akhiqizwa ukugeleza kwe-medium epayipini, okuwenza abe uhlobo lwe-automatic valve.Ama-valve okuhlola asetshenziswa ezinhlelweni zamapayipi futhi imisebenzi yawo eyinhloko ukuvimbela ukubuyela emuva okuphakathi, ukuvimbela ukuguqulwa kwamaphampu nezinjini zokushayela, nokukhulula imidiya yesitsha.Amavalvu okuhlola angasetshenziswa futhi kumapayipi ahlinzeka ngamasistimu asizayo lapho ingcindezi ingase ikhuphuke ngaphezu komfutho wesistimu.Angahlukaniswa ikakhulukazi ohlotsheni olujikelezayo (luzungeza ngokusekelwe enkabeni yamandla adonsela phansi) kanye nohlobo lokuphakamisa (luhamba luhambisana ne-eksisi).
Isikhathi sokuthumela: Jun-03-2023