Xa indawo yokufakela ilinganiselwe, nceda uqaphele:

Ivalve yesango inokuvalwa ngokuqinileyo kunye nomgangatho wokutywina ngoxinzelelo oluphakathi, ukuze kufezekiswe umphumo wokungavuzi.Xa uvula kwaye uvala, i-valve core kunye ne-valve seat i-surface yokutywina ihlala idibanisa kwaye ikhuhla omnye komnye, ngoko ke indawo yokutywina kulula ukuyinxiba.Xa ivalve yesango isondele ekuvaleni, umahluko woxinzelelo phakathi komphambili nasemva kombhobho mkhulu, nto leyo eyenza ukuba umphezulu wokutywina unxibe ngakumbi.

Isakhiwo sevalve yesango siya kuba nzima ngakumbi kuneso sivalo seglowubhu.Ngokwembono yembonakalo, ivalve yesango inde kunevalve yeglowubhu kwaye ivalve yeglowubhu inde kunevalve yesango phantsi kobubanzi obufanayo.Ukongezelela, iivalve zesango zihlulwe zibe ziintonga ezivulekileyo kunye neentonga ezimnyama.Ivalve yokuvala ayifuni.

Ngaba ivalve yeglowubhu kunye nevalve yesango zinokuxutywa?

umgaqo wokusebenza

Xa ivalve yeglowubhu ivuliwe kwaye ivaliwe, luhlobo lwe-valve ekhulayo, oko kukuthi, xa i-handwheel iguqulwa, i-handwheel iya kujikeleza kwaye iphakamise kunye ne-valve stem.Ivalve yesango kukujikelezisa ivili lesandla ukwenza isikhondo sevalve sinyuke sisehla, kwaye indawo yesandla ngokwayo ihlala ingatshintshi.

Amazinga okuhamba ayahluka, iivalvu zesango zifuna ukuvuleka ngokupheleleyo okanye ukuvalwa ngokupheleleyo, kwaye iivalve zeglowubhu azifuni.Iivalvu zeglowubhu zineendlela zokungena neziphumayo, ngelixa iivalvu zesango zingenazo iimfuneko zendlela yokungena nokuphuma.

Ukongezelela, i-valve yesango inamazwe amabini kuphela: ivule ngokupheleleyo okanye ivalwe ngokupheleleyo, isango lokuvula kunye ne-stroke yokuvala inkulu, kwaye ixesha lokuvula nokuvala lide.I-stroke yentshukumo yeplati yevalve yevalve yeglowubhu incinci kakhulu, kwaye ipleyiti yevalve yevalve yeglowubhu inokumisa kwindawo ethile ngexesha lentshukumo yolawulo lokuhamba.Ivalve yesango ingasetyenziselwa kuphela ukunqunyulwa kwaye ayinayo eminye imisebenzi.

Umahluko wokusebenza

Ivalve yeglowubhu ingasetyenziselwa zombini ukusika kunye nolawulo lokuhamba.Ukuxhathisa ulwelo lwevalve yeglowubhu kukhulu, kwaye kunzima kakhulu ukuvula nokuvala, kodwa ngenxa yokuba umgama phakathi kwepleyiti yevalve kunye nomphezulu wokutywina umfutshane, ukuvulwa nokuvala istroke kufutshane.

Ngenxa yokuba ivalve yesango inokuvulwa ngokupheleleyo kwaye ivalwe ngokupheleleyo, xa ivulwe ngokupheleleyo, ukuchasana kokuhamba okuphakathi kumjelo womzimba wevalve phantse ku-0, ngoko ke ukuvulwa kunye nokuvalwa kwevalve yesango kuya kusindisa kakhulu abasebenzi, kodwa isango likude kumphezulu wokutywina, kwaye ixesha lokuvula nokuvala lide..

ukufakwa kunye nokuhamba

Iivalve yesangoinesiphumo esifanayo kumacala omabini.Akukho mfuneko yolwalathiso lwe-inlet kunye ne-outlet, kwaye i-medium inokuhamba kumacala omabini.Ivalve yeglowubhu kufuneka ifakwe ngokungqongqo ngokuhambelana nesalathiso esiphawulwe lutolo kumzimba wevalvu.Kukho kwakhona ummiselo ocacileyo kwicala lokungena kunye nokuphuma kwevalve yeglowubhu.“Iinkqubo zeekhemikhali ezintathu” zeevalvu kwilizwe lam zimisela ukuba indlela yokuhamba kwevalve yeglowubhu iya kuba ukusuka phezulu ukuya ezantsi.

Ivalve yeglowubhu iphantsi kwaye iphezulu ngaphandle, kwaye kucacile ukusuka ngaphandle ukuba umbhobho awukho kumgca othe tye wesigaba esinye.Umjelo wevalvu yesango ikumgca othe tye.I-stroke yevalve yesango inkulu kunaleyo yevalve yeglowubhu.

Ukususela kumbono wokumelana nokuhamba, ukuchasana kokuhamba kwe-valve yesango kuncinci xa kuvuliwe ngokupheleleyo, kwaye ukuchasana kokuhamba kwe-valve yokuhlola umthwalo kukhulu.I-coefficient yokumelana nokuhamba kweevalve zesango eziqhelekileyo malunga ne-0.08 ~ 0.12, amandla okuvula kunye nokuvala kuncinci, kwaye i-medium inokuhamba ngeendlela ezimbini.Ukumelana nokuhamba kweevalvu eziqhelekileyo zeglobhu ngamaxesha angama-3-5 kuneevalvu zesango.Xa uvula kwaye uvala, kufuneka unyanzeliswe ukuvala ukufezekisa ukutywinwa.Undoqo wevalve yevalve yeglowubhu inxibelelana kuphela nendawo yokutywina xa ivalwe ngokupheleleyo, ngoko ke ukunxitywa komphezulu wokutywina kuncinci kakhulu.Ngenxa yokuhamba okukhulu kwamandla aphambili, ivalve yeglowubhu efuna i-actuator kufuneka inikele ingqalelo kwindlela yokulawula itorque.Uhlengahlengiso.

Kukho iindlela ezimbini zokufakela ivalve yeglowubhu.Enye kukuba i-medium ingangena ukusuka ezantsi kwe-valve core.Inzuzo kukuba ukupakisha akukho phantsi koxinzelelo xa i-valve ivaliwe, enokwandisa ubomi benkonzo yokupakisha kwaye inokuthwala uxinzelelo kwipayipi phambi kwevalve.Ngaphantsi kweemeko, ukutshintshwa kokupakisha kwenziwa;into engalunganga kukuba i-torque yokuqhuba i-valve inkulu, malunga namaxesha angama-1 okuhamba okuphezulu, i-axial force kwi-valve stem inkulu, kwaye i-valve stem ilula ukugoba.

Ke ngoko, le ndlela ilungele kuphela iivalvu zeglowubhu ezinobubanzi obuncinci (ngaphantsi kwe-DN50), kwaye iivalvu zeglowubhu ngaphezulu kwe-DN200 zisebenzisa indlela equkuqela eliphakathi ukusuka phezulu.(Ivalve yeglowubhu yombane ithatha ngokubanzi indlela yokungena phakathi ukusuka phezulu.) Ukungalungi kokungena kuphakathi ukusuka phezulu kuchasene nendlela yokungena ukusuka ezantsi.

tywina

Umphezulu wokutywina wevalve yeglowubhu licala elincinci le-trapezoidal ye-valve core (ngokukodwa kuxhomekeke kwimilo ye-valve core).Emva kokuba i-valve core iwa, ilingana nokuvala i-valve (ukuba umehluko woxinzelelo mkhulu, ngokuqinisekileyo, awuvalwanga ngokuqinileyo, kodwa i-anti-reverse effect ayibi).Ivalve yesango ivalwe ecaleni kwesango elingundoqo levalvu.