Iivalvu zeglowubhu, iivalvu zesango, iivalve zebhabhathane, iivalve zetshekhi kunye neevalvu zebhola zonke ngamacandelo olawulo ayimfuneko kwiinkqubo ezahlukeneyo zemibhobho namhlanje. Ivalve nganye yahlukile ngenkangeleko, ulwakhiwo kunye nokusetyenziswa okusebenzayo. Nangona kunjalo, ivalve yeglowubhu kunye nevalve yesango zinento efanayo kwinkangeleko, kwaye kwangaxeshanye zinomsebenzi wokunqunqa kumbhobho, ngoko kuya kubakho abahlobo abaninzi abangadibanisi kakhulu nevalve ukubhidanisa ezi zimbini. Ngapha koko, ukuba ujongisisa, umahluko phakathi kwevalve yeglowubhu kunye nevalve yesango usemkhulu kakhulu.
- Ulwakhiwo
Kwimeko yendawo yofakelo olunyiniweyo, kuyimfuneko ukunikela ingqalelo kukhetho lwe:
Ivalve yesango inokuvalwa ngokuqinileyo kunye nomgangatho wokutywina ngokuthembela kuxinzelelo oluphakathi, ukuze kufezekiswe umphumo wokungavuzi. Xa uvula kwaye uvala, i-valve spool kunye nendawo yokutywina yesitulo sevalve ihlala inxibelelana enye kwenye kwaye ikhuhla omnye komnye, ngoko ke umphezulu wokutywina kulula ukunxiba, kwaye xa ivalve yesango isondele ekuvaleni, umahluko woxinzelelo phakathi komphambili kunye nomva wombhobho mkhulu kakhulu, okwenza umphezulu wokutywina unxibe kakhulu.
Ukwakhiwa kwevalve yesango kuya kuba nzima ngakumbi kune-valve yeglowubhu, ukusuka kwindawo yokujonga, kwimeko yecaliber efanayo, i-valve yesango iphezulu kune-globe valve, kwaye i-valve yeglobhu ide kune-valve yesango. Ukongezelela, i-valve yesango ihlulwe ibe yintonga eqaqambileyo kunye nentonga emnyama. Ivalve yeglowubhu ayikho.
- Sebenza
Xa ivalve yeglowubhu ivuliwe kwaye ivaliwe, luhlobo lwesiqu esinyukayo, oko kukuthi, ivili lesandla lijikeleziswa, kwaye ivili lesandla liya kwenza ukujikeleza kunye nokuphakamisa iintshukumo kunye nesiqu sevalve. I-valve yesango kukuguqula i-handwheel, ukwenzela ukuba i-stem yenza intshukumo yokuphakamisa, kwaye indawo yesandla ngokwayo ihlala ingatshintshi.
Amazinga okuhamba ayahluka, kunye neevalvu zesango ezifuna ukuvalwa ngokupheleleyo okanye ngokupheleleyo, ngelixa iivalve zeglowubhu zingenzi. Ivalve yeglowubhu inendlela echaziweyo yokungena kunye neyokuphuma, kwaye ivalve yesango ayinayo imfuno yokungenisa kunye nokuthumela ngaphandle.
Ukongezelela, i-valve yesango ivule kuphela ngokupheleleyo okanye ivalwe ngokupheleleyo i-states ezimbini, ukuvulwa kwesango kunye nokuvalwa kwe-stroke kukhulu kakhulu, ixesha lokuvula kunye nokuvala lide. Ukubetha kwepleyiti yevalve yevalve yeglowubhu incinci kakhulu, kwaye ipleyiti yevalve yevalve yeglowubhu inokuma kwindawo ethile ishukumise ulungelelwaniso lokuhamba. Ivalve yesango ingasetyenziselwa kuphela ukunqunyulwa kwaye ayinawo omnye umsebenzi.
- Ukusebenza
Ivalve yeglowubhu ingasetyenziselwa ukunqunyulwa kunye nolawulo lokuhamba. Ukuxhathisa ulwelo lwevalve yeglowubhu kukhulu, kwaye kunzima kakhulu ukuvula nokuvala, kodwa ngenxa yokuba ipleyiti yevalvu imfutshane ukusuka kumphezulu wokutywina, ukuvuleka kunye nokuvala i-stroke kufutshane.
Ngenxa yokuba ivalve yesango inokuvulwa ngokupheleleyo kwaye ivalwe ngokupheleleyo, xa ivuliwe ngokupheleleyo, ukuxhathisa ukuhamba okuphakathi kwijelo lomzimba wevalve phantse i-0, ngoko ke ukuvulwa nokuvalwa kwevalve yesango kuya kuba nzima kakhulu, kodwa ipleyiti yesango ikude ukusuka kwindawo yokutywina, kwaye ixesha lokuvula kunye nokuvala lide.
- Ukufakela kunye nesikhokelo sokuhamba
Umphumo wevalve yesango ejikelezayo kumacala omabini iyafana, kwaye akukho mfuneko yendlela yokungena kunye neyokuphuma yofakelo, kwaye i-medium inokuhamba kumacala omabini. Ivalve yeglowubhu kufuneka ifakwe ngokuhambelana ngqongqo nesalathiso sophawu lotolo lomzimba wevalve, kwaye kukho ilungiselelo elicacileyo kwicala lokungenisa nokuthumela ngaphandle kwevalve yeglowubhu, kunye necala lokuhamba kwevalve yeglowubhu “ezintathu ukuya” eTshayina ukusuka phezulu ukuya ezantsi.
I-valve yeglobhu iphantsi kwaye iphezulu, kwaye ukusuka ngaphandle kukho imibhobho ecacileyo engekho kwinqanaba lesigaba. Imbaleki yevalve yesango ikumgca othe tye. I-stroke yevalve yesango inkulu kunaleyo yevalve yeglowubhu.
Ukususela kumbono wokumelana nokuhamba, ukuchasana kokuhamba kwe-valve yesango kuncinci xa kuvulekile ngokupheleleyo, kwaye ukuchasana kokuhamba kwe-valve yokumisa umthwalo kukhulu. I-coefficient yokumelana nokuhamba kwevalve yesango eqhelekileyo imalunga ne-0.08 ~ 0.12, amandla okuvula kunye nokuvala kuncinci, kwaye i-medium inokuhamba ngeendlela ezimbini. Ukumelana nokuhamba kweevalve eziqhelekileyo zokuvala ngama-3-5 amaxesha eevalve zesango. Xa uvula kwaye uvala, kuyimfuneko ukunyanzela ukuvalwa ukufezekisa itywina, i-valve spool yevalve yeglowubhu inxibelelana kuphela nomphezulu wokutywina xa ivalwe ngokupheleleyo, ngoko ke ukunxiba komphezulu wokutywina kuncinci kakhulu, kuba ukuhamba kwamandla aphambili kufuna ukongeza i-actuator yevalve yeglowubhu kufuneka ithathele ingqalelo uhlengahlengiso lolawulo lwetorque.
I-valve ye-globe ineendlela ezimbini zokufakela, enye kukuba i-medium ingangena ukusuka ngaphantsi kwe-valve spool, inzuzo kukuba xa i-valve ivaliwe, ukupakisha akukho phantsi koxinzelelo, ubomi benkonzo yokupakisha bunokwandiswa, kwaye umsebenzi wokutshintsha indawo yokupakisha unokuqhutywa phantsi koxinzelelo kwipayipi phambi kwevalve; into engalunganga kukuba i-torque yokuqhuba i-valve inkulu, malunga namaxesha angama-1 ahamba phezulu, kunye ne-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 zikhethwa ngendlela yeendaba ezigeleza ukusuka phezulu. (Iivalvu zokuvala umbane ngokuqhelekileyo zisebenzisa isiphakathi ukungena ukusuka phezulu.) Ububi bendlela imidiya engena ukusuka phezulu ichasene ngqo nendlela engena ngayo ngezantsi.
- Ukutywinwa
Umphezulu wokutywina wevalve yeglowuli licala elincinci letrapezoidal londoqo wevalve (jonga ngokuthe ngqo kwimilo yevalve core), xa intsimbi yevalve iwela, ilingana nokuvalwa kwevalve (ukuba umahluko woxinzelelo mkhulu, ngokuqinisekileyo, ukuvalwa akungqongqo, kodwa isiphumo esingasemva asibi), ipleyiti yecango yecango itywinwa njengesixhobo sokutywina, iplati yesango yevalve itywinwa njengesiseko sevalve. Ivalve yeglowubhu, kwaye undoqo wevalve awusayi kuwa njengevalve yeglowubhu.
Ixesha lokuposa: Apr-01-2022
