Makhe sazise ukuba yintoni umahluko phakathi kwevalve yeglowubhu kunye ne-aivalve yesango.
01
Ulwakhiwo
Xa indawo yokufakela ilinganiselwe, qwalasela ukhetho:
Iivalve yesangoinokuxhomekeka kuxinzelelo oluphakathi ukuvala ngokuqinileyo umphezulu wokutywina, ukuze ufezekise umphumo wokungavuzi. Xa uvula kwaye uvala, isiseko sevalve kunye nendawo yokutywina yesihlalo sevalve ihlala inxibelelana kwaye ikhuhla omnye komnye, ngoko ke indawo yokutywina kulula ukunxiba, kwaye xaivalve yesangoisondele ekuvaleni, umahluko woxinzelelo phakathi komphambili nasemva wombhobho mkhulu kakhulu, nto leyo eyenza ukuba umphezulu wokutywina unxibe kakhulu.
Ubume beivalve yesangoiya kubanzima ngakumbi kunevalve yeglowubhu, ukusuka kwindawo yembonakalo, kwimeko yomgangatho ofanayo, ivalve yesango iphezulu kunevalve yeglowubhu, kwaye ivalve yeglowubhu inde kunevalve yeglowubhu.ivalve yesango. Ukongeza, iivalve yesangoyahlulwe yaba yintonga eqaqambileyo kunye nentonga emnyama. Iivalve zokuvala azenzi.
Ingaba isebenza kanjani
Xa i-valve ye-globe ivuliwe kwaye ivaliwe, i-stem ekhulayo, oko kukuthi, xa i-handwheel ijikeleza, i-handwheel iya kujikeleza kwaye iphakamise ngesiqu. Iivalve yesangokukujikelezisa ivili lesandla ukwenza isikhondo sevalve senze intshukumo yokuphakamisa, kwaye indawo yesandla ngokwayo ihlala ingatshintshi.
Amazinga okuhamba ayahluka, ngeiivalve zesangoifuna ukuvuleka ngokupheleleyo okanye ukuvala ngokupheleleyo, ngelixa iivalvu zeglowubhu zingenzi. Ivalve yeglowubhu inendlela echaziweyo yokungena kunye neyokuphuma, kunye neivalve yesangoayinayo imfuneko yendlela yokungena nokuphumayo.
Ukongeza, iivalve yesangokuphela inamazwe amabini: evulekile ngokupheleleyo okanye evalwe ngokupheleleyo, kwaye i-stroke yokuvula nokuvalwa kweplate yesango inkulu kakhulu, kwaye ixesha lokuvula nokuvala lide. I-stroke yentshukumo yepleyiti yevalve yevalve yeglowubhu incinci kakhulu, kwaye ipleyiti yevalve yevalve yeglowubhu inokuma kwindawo ethile ishukumise ulungelelwaniso lokuhamba. Iivalve yesangoingasetyenziselwa kuphela ukunqunyulwa kwaye ayinayo eminye imisebenzi.
Ukwahluka kwentsebenzo
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 yokubaivalve yesangoinokuvulwa kuphela kwaye ivalwe ngokupheleleyo, xa ivulwe ngokupheleleyo, ukuchasana kokuhamba okuphakathi kumjelo womzimba wevalve kuphantse kube ngu-0, ngoko ke ukuvulwa kunye nokuvalaivalve yesangokuya kuba nzima kakhulu ukusindisa, kodwa ipleyiti yesango ikude kumphezulu wokutywina, kwaye ixesha lokuvula kunye nokuvala lide.
04
Ukufakela kunye nesikhokelo sokuhamba
Isiphumo seivalve yesangoisikhokelo sokuhamba kumacala omabini siyafana, akukho mfuneko yendlela yokungena kunye neyokuphuma yofakelo, kwaye i-medium inokuqukuqela kumacala omabini. Ivalve yeglowubhu kufuneka ifakwe ngokuhambelana ngqongqo kunye nesalathiso esiphawulwe lutolo lwevalve yomzimba, kwaye kukho ulungiselelo olucacileyo kwicala lokungena kunye nokuphuma kwevalve yeglowubhu, kunye nendlela yokuhamba kwevalve yeglowubhu. yamkelwe ukusuka phezulu ukuya ezantsi ngokwe "inguqu ezintathu" zevalve yaseTshayina.
I-valve yokuvala iphantsi kwaye iphezulu, kwaye ukusuka ngaphandle kukho umbhobho ocacileyo ongekho kwinqanaba lesigaba esinye. Iivalve yesangoindlela yokuhamba ikumgca othe tye. Ukubetha kweivalve yesangoinkulu kunaleyo yevalve yeglowubhu.
Ukususela kumbono wokumelana nokuhamba, xa uvulekile ngokupheleleyo, ukuchasana kokuhamba kwe-valve yesango kuncinci, kwaye ukuchasana kokuhamba kwe-valve yokumisa umthwalo kukhulu. I-coefficient yokumelana nokuhamba kwesiqheloivalve yesangomalunga ne-0.08 ~ 0.12, amandla okuvula kunye nokuvala kuncinci, kwaye i-medium inokuhamba ngeendlela ezimbini. Ukumelana nokuhamba kweevalvu eziqhelekileyo zeglobhu ngamaxesha angama-3-5iivalve zesango.Ukuvulwa kunye nokuvala kufuneka kunyanzeliswe ukuvala ukufezekisa ukutywinwa, i-spool yevalve yeglowubhu ivalwe ngokupheleleyo xa inxibelelana nomphezulu wokutywina, ngoko ke ukunxiba komphezulu wokutywina kuncinci kakhulu, ngenxa yokuhamba okukhulu kwamandla amakhulu ukuya. yongeza i-actuator yevalve yeglowubhu kufuneka inikele ingqalelo kuhlengahlengiso lolawulo lwetorque.
Kukho iindlela ezimbini zokufakela i-valve yeglobe, enye kukuba i-medium ingangena phantsi kwe-spool, inzuzo kukuba ukupakisha akuxinzezeleki xa i-valve ivaliwe, enokwandisa ubomi benkonzo yokupakisha, kwaye inokutshintsha indawo. ukupakisha xa umbhobho ophambi kwevalve uphantsi koxinzelelo; Ukungalungi kukuba i-torque yokuqhuba i-valve inkulu, malunga namaxesha angama-1 okuhamba okuphezulu, i-axial force ye-valve stem inkulu, kwaye i-valve stem ilula ukugoba.
Ke ngoko, le ndlela ilungele kuphela iivalvu zeglowubhu ezinobubanzi obuncinci (i-DN50 okanye ngaphantsi), kwaye iivalvu zeglowubhu ngaphezulu kwe-DN200 zisebenzisa i-medium equkuqela ukusuka phezulu. (Iivalvu zeglowubhu zombane zisebenzisa i-medium ukungena ukusuka phezulu.) Ukungalungi kwendlela yokungena eendaba ukusuka phezulu kuchasene ngqo nendlela yokungena esezantsi.
05
Ukutywinwa
Umphezulu wokutywina wevalve yeglowubhu licala elincinci le-trapezoidal ye-valve core (jonga ngokuthe ngqo kwimilo ye-valve core), xa i-valve core iwa, ilingana nokuvalwa kwevalve (ukuba umehluko woxinzelelo mkhulu, kunjalo, ukuvalwa akukho ngqongqo, kodwa i-check effect ayibi), iivalve yesangoitywinwe ecaleni kwepleyiti yevalve engundoqo yesango, isiphumo sokutywina asilunganga njengevalve yeglowubhu, kwaye undoqo wevalve awusayi kuwa njengevalve yeglowubhu elingana nevalve yokuvala.
Ixesha lokuposa: Apr-08-2023
