Ukukhethwa kwesixhobo sombane sevalve yombane kusekelwe ikakhulu kumgaqo-siseko wokuba ukhetho lwepetroleum kunye neekhemikhali zevalve yombane kufuneka zilandele.
Isixhobo sombane seValve sisixhobo esiyimfuneko ukuze siqonde ulawulo lwenkqubo yevalvu, ulawulo oluzenzekelayo kunye nolawulo olukude. Inkqubo yayo yokunyakaza inokulawulwa ngokubetha, i-torque okanye ubungakanani be-axial thrust. Ngenxa yokuba iimpawu zokusebenza kunye nesantya sokusetyenziswa kwesixhobo sombane sevalve sixhomekeke kuhlobo lwesivalo, ukucaciswa kokusebenza kwesixhobo kunye nendawo yevalve kumbhobho okanye isixhobo, ke ngoko, ukhetho oluchanekileyo lwesixhobo sombane sevalve lubalulekile. ukuthintela ukwenzeka komthwalo ogqithisileyo (i-torque yokusebenza iphezulu kune-torque yokulawula).
Ngokwesiqhelo, ukhetho oluchanekileyo lwesixhobo sombane sevalve esekwe koku kulandelayo:
Itorque esebenzayo Itorque yokusebenza yeyona parameter iphambili yokukhetha isixhobo sombane sevalve. I-torque ephumayo yesixhobo sombane kufuneka ibe yi-1.2 ~ 1.5 amaxesha e-torque enkulu yokusebenza yevalve.
Kukho izinto ezimbini eziphambili zokusebenza kwesixhobo sombane sevalve ye-thrust: enye ayicwangciswanga nge-disc thrust, i-torque ephuma ngokuthe ngqo; Olunye luqwalaselo lwe-disc ye-thrust, i-torque ye-output nge-thrust disc stem nut kwi-output thrust.
Inani lokujika kweshafti ephumayo yesixhobo sombane sevalve linxulumene nedayamitha yegama lesiqu sevalve kunye nenani lemisonto. Ibalwa ngokwe-M=H/ZS (M linani lilonke lokujika ekufuneka isixhobo sombane sidibane nalo, H bubude obuvulayo besiqu sevalve, S yipitch yevalve stem drive thread kunye noZ inani le-valve stem thread).
Idayamitha ye-Stem ye-multi-turn open-stem valves, ukuba i-stem diameter enkulu evunyelwe yisixhobo sombane ayikwazi ukudlula kwi-valve ye-valve, ayikwazi ukuhlanganiswa kwivalve yombane. Ngoko ke, i-diameter yangaphakathi ye-hollow output shaft yesixhobo sombane kufuneka ibe mkhulu kunobubanzi obungaphandle besiqu se-valve ye-stem evulekileyo. Kwiivalvu zentonga emnyama kwiivalve ezijikelezayo kunye neevalve ezininzi ezijikelezayo, nangona kungafuneki ukuba kuqwalaselwe ukudlula kwesiqu se-valve ububanzi, i-valve stem diameter kunye nobungakanani bendlela engundoqo kufuneka kuqwalaselwe ngokupheleleyo ekukhetheni, ukuze indibano ingasebenza ngokuqhelekileyo.
Ukuba isantya sokuvula kunye nokuvala i-valve yesantya sokuphuma sikhawuleza kakhulu, kulula ukuvelisa i-percussion phenomenon yamanzi. Ngoko ke, isantya esifanelekileyo sokuvula kunye nokuvala kufuneka sikhethwe ngokwemiqathango eyahlukeneyo yokusetyenziswa.
Isixhobo sombane se-Valve sineemfuno ezikhethekileyo, oko kukuthi, kufuneka sikwazi ukukhawulela i-torque okanye i-axial force. Ngokuqhelekileyo isixhobo sombane sevalve sisebenzisa i-shaft yokunciphisa i-torque. Xa ukucaciswa kwesixhobo sombane kunqunywe, i-torque yayo yokulawula inqunywe. Ngokuqhelekileyo kwixesha elimiselweyo lokusebenza kwangaphambili, i-motor ayiyi kulayisha ngaphezulu. Kodwa ukuba iimeko ezilandelayo zingakhokelela ekugqithiseni: okokuqala, amandla ombane aphantsi, akakwazi ukufumana i-torque efunekayo, ukwenzela ukuba i-motor iyeke ukujikeleza; Okwesibini, akulunganga ukulungelelanisa indlela yokunciphisa i-torque, ukuze ibe mkhulu kune-torque emisiweyo, ekhokelela kwi-torque eqhubekayo, ukwenzela ukuba imoto iyeke ukujikeleza; Okwesithathu, ukusetyenziswa okwethutyana, ukonga ubushushu, ngaphezu kokuxabisa ubushushu obuvumelekileyo bemoto; Okwesine, ukungaphumeleli kwesiphaluka kwendlela yokunciphisa i-torque kwenzeka ngenxa yesizathu esithile, ukwenzela ukuba i-torque inkulu kakhulu; Okwesihlanu, ubushushu be-ambient buphezulu kakhulu, ukuze amandla obushushu emoto anciphe kancinci.
Ngaphambili, indlela yokukhusela i-motor kukusebenzisa i-fuses, i-overcurrent relays, i-thermal relays, i-thermostats, njl., kodwa ezi ndlela zinenzuzo kunye nokungonakali. Kwizixhobo zombane ezifana nezixhobo zomthwalo oguquguqukayo, ukhuseleko oluthembekileyo alukho. Ngoko ke, iintlobo ezahlukeneyo zokudibanisa kufuneka zithathwe, zishwankathelwe kwiindidi ezimbini: enye kukugweba ukwanda okanye ukuhla kwe-motor input current; Okwesibini kukugweba imeko yokufudumala kwemoto ngokwayo. Nokuba yeyiphi na indlela, amandla obushushu bemoto kufuneka athathelwe ingqalelo kwisibonelelo sexesha elinikiweyo.
Ngokuqhelekileyo, indlela yokukhusela isiseko somthwalo ogqithisiweyo kukuba: ukukhuselwa kokugqithiswa kokusebenza ngokuqhubekayo okanye ukusebenza kwendawo yemoto, i-thermostat isetyenziswa; Ukukhusela i-motor blocking, i-thermal relay isetyenziswa; Kwiingozi zesekethe ezimfutshane, i-fuse okanye i-overcurrent relay isetyenziswa.
I-Petroleum, ukhetho lweekhemikhali zevalve yombane kufuneka lulandele umgaqo
I-Petroleum, ukhetho lweekhemikhali zevalve yombane kufuneka lulandele umgaqo
Phambi kokwahlulwa kwevalve yombane ezininzi kangaka kunye nohlobo oluntsonkothileyo lweemeko, ukukhetha ukufakwa kwenkqubo yombhobho yeyona mveliso ifanelekileyo yevalve yombane, kufuneka siqale siqonde iimpawu zevalve yombane; Okwesibini, kufuneka ukwazi ukukhetha amanyathelo evalve yombane kunye nesiseko; Ngaphezu koko kufuneka kulandelwe ukhetho lwepetroleum, ishishini lemichiza elinomgaqo wevalvu yombane.
Ukukhethwa kwepetroleum, ishishini lemichiza umgaqo wevalve yombane: umjelo wokuhamba uqonde ngqo kwivalve yombane, ukuchasana kwayo nokuhamba kwayo kuncinci, ngokuqhelekileyo kukhetha njengendlela yokusika kunye nevulekileyo kunye nevalve yombane; Kulula ukulungelelanisa ukuhamba kweevalvu zombane njengolawulo lokuhamba; Iivalve zeplagi kunye neevalve zebhola zifaneleke ngakumbi ukubuyisela umva i-shunt; Ukutyibilika kwenxalenye yokuvala ecaleni kwendawo yokutywina kunye nefuthe lokucima i-valve yombane iyona nto ifaneleke kakhulu kwi-medium kunye namasuntswana amisiweyo.
A, i-cut-off kunye ne-open medium ye-valve zombane
Umjelo wokuhamba uqonde ngqo kwi-valve yombane, ukuchasana kokuhamba kuncinci, ngokuqhelekileyo kukhethwe njenge-cut-off kunye ne-open medium kunye ne-valve yombane. Ivalve yombane evalekileyo ukuya ezantsi (ivalve yeglowubhu, ivalve yeplunger) ngenxa yendlela yayo yokuqukuqela, ukumelana nokuhamba kuphezulu kunezinye iivalve zombane, ngoko ke ukhetho oluncinci. Kwimeko yokuvumela ukuchasana kokuhamba okuphezulu, i-valve yombane evaliweyo ingasetyenziswa.
Okwesibini, lawula ukuhamba kweevalvu zombane
Ngokuqhelekileyo khetha lula ukulungisa ivalve yombane njengolawulo lokuhamba. Iivalvu zombane ezivalayo eziya ezantsi, ezinjengeeglowubhu zeglowubhu, zilungele le njongo kuba ubungakanani bezitulo zazo bulingana nokubetha kwento yokuvala. Iivalvu zombane ezijikelezayo (iplagi, ibhabhathane, iivalve zebhola) kunye ne-flex-body electric valves (i-pinch, diaphragm) nazo zingasetyenziselwa ukulawula ukugobhoza, kodwa ngokuqhelekileyo kuphela kuluhlu olulinganiselweyo lwee-valve ze-valve zombane. Ivalve yesango yisango elimilise idiskhi ukuya kumlomo wesitulo sevalve ejikelezayo ukwenza intshukumo yokunqumla, isondele kuphela kwindawo evaliweyo, inokulawula ngcono ukuhamba, ngoko ayiqhelekanga ukusetyenziswa kulawulo lokuqukuqela.
Isithathu, ivalve yombane ye-shunt ebuyela umva
Le valve yombane inokuba nemijelo emithathu okanye ngaphezulu ngokuxhomekeke kwimfuno yokubuyisela umva i-shunt. Iivalvu zeplagi kunye nebhola zifaneleke ngakumbi kule njongo, ngoko ke iivalvu ezininzi zombane ezisetyenziselwa ukubuyisela umva i-shunt zisebenzisa enye yezi valves zombane. Kodwa kwezinye iimeko, ezinye iindidi zeevalve zombane, nje ukuba iivalve ezimbini okanye ngaphezulu zombane ziqhagamshelwe ngokufanelekileyo omnye komnye, zingasetyenziselwa ukubuyisela umva i-shunt.
Isine, ivalve yombane enamasuntswana amisiweyo aphakathi
Xa kukho iinqununu ezimisiweyo phakathi, zifanelekile i-valve yombane kunye nomsebenzi wokusula we-sliding wecandelo lokuvala kunye nokutywinwa kwendawo. Ukuba intshukumo yangasemva naphambili yeqhekeza lokuvala kwisihlalo sithe nkqo, ngoko ke inokuthi ibambe amasuntswana, ngoko le valve yombane ngaphandle kokuba izinto zokutywina zinokuvumela amasuntswana e-embedding, kungenjalo afanelekile kuphela kwimidiya esisiseko ecocekileyo. I-valve yebhola, i-valve yeplagi, i-valve ye-butterfly kwinkqubo yokuvula kunye nokuvala kunefuthe lokusula kwindawo yokutywina, ngoko ifanelekile ukusetyenziswa phakathi kunye namasuntswana amisiweyo.
Okwangoku, nokuba kwi-petroleum, ikhemikhali, okanye kwamanye amashishini enkqubo yombhobho, ukusetyenziswa kwevalve yombane, ukusebenza rhoqo kunye nenkonzo ihlala iguquka, ukulawula okanye ukuphelisa ukuvuza okuphantsi, okubalulekileyo, izixhobo eziphambili okanye ukuthembela kwiivalvu zombane. Ulawulo lokugqibela lombhobho yivalve yombane, ivalve yombane kwiindawo ezahlukeneyo zoshishino lwenkonzo kunye nokusebenza okuthembekileyo.
Ixesha lokuposa: Dec-20-2022
