Amavalvu embulunga, ama-valve esango, ama-valve ebhabhathane, ama-valve okuhlola, ama-valve ebhola, njll. konke kuyizingxenye zokulawula ezibalulekile ezinhlelweni ezahlukene zamapayipi. I-valve ngayinye ihlukile ngokubukeka, isakhiwo kanye nokusetshenziswa okusebenzayo. Kodwa-ke, i-valve yomhlaba kanye ne-valve yesango kufana ngokubukeka, futhi kokubili kunomsebenzi wokunqamula epayipini, ngakho abangani abaningi abangenawo ukuxhumana okuncane nama-valve bazodida laba ababili. Eqinisweni, uma uqaphela ngokucophelela, umehluko phakathi kwe-valve yomhlaba kanye ne-valve yesango mkhulu kakhulu.

1 Isakhiwo

Uma isikhala sokufaka silinganiselwe, kufanele unake ukukhetha. I-valve yesango ingavalwa ngokuqinile ngomphezulu wokuvala ngengcindezi ephakathi, ukuze kufezwe umphumela wokungavuzi. Lapho uvula futhi uvala,umongo wevalvu kanye nobuso bokuvala isihlalo sevalvuZihlala zithintana futhi zigudlana, ngakho-ke indawo yokuvala kulula ukuyigqoka. Uma ivalvu yesango isiseduze nokuvala, umehluko wokucindezela phakathi kwangaphambili nangemuva kwepayipi mkhulu kakhulu, okwenza indawo yokuvala iguge kakhulu. Isakhiwo sevalvu yesango sizoba yinkimbinkimbi kakhulu kunevalvu yembulunga. Ngokombono wokubukeka, ngaphansi kobukhulu obufanayo, ivalvu yesango iphakeme kunevalvu yembulunga, kanti ivalvu yembulunga inde kunevalvu yesango. Ngaphezu kwalokho, ivalvu yesango ihlukaniswe futhi yaba yisiqu esikhuphukayo kanye nesiqu esifihliwe. Ivalvu yembulunga ayinayo.

2 Isimiso sokusebenza

Uma ivalvu yokumisa ivulwa futhi ivaliwe, iwuhlobo lwesiqu sevalvu ekhuphukayo, okungukuthi, uma isondo lesandla liphendulwa, isondo lesandla lizojikeleza futhi likhuphuke futhi lehle kanye nesiqu sevalvu. Ivalvu yesango iphendula isondo lesandla ukuze isiqu sevalvu sikhuphuke futhi sehle, futhi indawo yesondo lesandla ngokwayo ayishintshi. Izinga lokugeleza lihlukile. Ivalvu yesango idinga ukuvulwa okugcwele noma ukuvalwa okugcwele, kuyilapho ivalvu yokumisa ingashintshi. Ivalvu yokumisa ineziqondiso ezichaziwe zokungena kanye nokuphuma; ivalvu yesango ayinazo izidingo zokungena kanye nokuphuma. Ngaphezu kwalokho, ivalvu yesango inezimo ezimbili kuphela: ukuvulwa okugcwele noma ukuvalwa okugcwele. Ukuvulwa nokuvalwa kwesango kukhulu futhi isikhathi sokuvula nokuvala side. Ukunyakaza kwepuleti levalvu yevalvu yokumisa kuncane kakhulu, futhi ipuleti levalvu yevalvu yokumisa ingama endaweni ethile ngesikhathi sokunyakaza kokulawulwa kokugeleza. Ivalvu yesango ingasetshenziswa kuphela ukusika futhi ayinayo eminye imisebenzi.

3 Umehluko wokusebenza

I-valve yokumisa ingasetshenziswa kokubili ukusikaUkulawulwa kokuphuma nokugeleza. Ukumelana koketshezi kwevalvu yokumisa kukhulu kakhulu, futhi kunzima kakhulu ukuyivula nokuvala, kodwa ngenxa yokuthi ipuleti levalvu lifushane ukusuka endaweni yokuvala, ukushaywa kokuvula nokuvala kufushane. Ngenxa yokuthi ivalvu yesango ingavulwa ngokugcwele futhi ivalwe ngokuphelele kuphela, uma ivulwe ngokugcwele, ukumelana kokugeleza okuphakathi emgodini womzimba wevalvu cishe ku-0, ngakho-ke ivalvu yesango izokonga kakhulu ukuvula nokuvala, kodwa isango likude kakhulu nendawo yokuvala, futhi isikhathi sokuvula nokuvala side.

4 Ukufakwa kanye nesiqondiso sokugeleza

I-valve yesango inomphumela ofanayo kuzo zombili izinkomba, futhi akukho sidingo sezinkomba zokungena nezokuphuma ngesikhathi sokufakwa, futhi i-medium ingageleza kuzo zombili izinkomba. I-valve yokumisa idinga ukufakwa ngokuqinile ohlangothini lophawu lomcibisholo emzimbeni we-valve. Kukhona futhi nomthetho ocacile eziqondisweni zokungena nezokuphuma ze-valve yokumisa. I-valve yezwe lami ethi “three-in-one” ichaza ukuthi isiqondiso sokugeleza kwe-valve yokumisa sihlala sisuka phezulu kuya phansi.

Ivalvu yokumisa inokungena okuphansi kanye nendawo yokukhipha ephezulu, futhi ngaphandle kusobala ukuthi ipayipi alikho emgqeni ofanayo ovundlile. Isiteshi sokugeleza kwevalvu yesango sisemgqeni ofanayo ovundlile. Ukushaya kwevalvu yesango kukhulu kunokwevalvu yokumisa.

Ngokombono wokumelana nokugeleza, ivalvu yesango inokumelana okuncane kokugeleza uma ivuliwe ngokugcwele, kanti ivalvu yokuhlola inokumelana okukhulu kokugeleza. I-coefficient yokumelana nokugeleza kwevalvu yesango evamile icishe ibe ngu-0.08 ~ 0.12, amandla okuvula nokuvala mancane, kanti i-medium ingageleza ngezindlela ezimbili. Ukumelana nokugeleza kwamavalvu okumisa ajwayelekile kuphindwe kathathu-kahlanu kunokwamavalvu esango. Lapho kuvulwa futhi kuvalwa, ukuvalwa okuphoqelelwe kuyadingeka ukuze kufezwe ukuvalwa. Ingaphakathi levalvu yevalvu yokumisa lithinta indawo yokuvala kuphela uma ivaliwe ngokuphelele, ngakho-ke ukuguguleka kwendawo yokuvala kuncane kakhulu. Njengoba amandla amakhulu okugeleza emakhulu, ivalvu yokumisa edinga i-actuator kufanele inake ukulungiswa kwendlela yokulawula i-torque.

Kunezindlela ezimbili zokufaka i-stop valve. Enye ukuthi i-medium ingangena isuka phansi kwe-valve core. Inzuzo ukuthi ukupakisha akucindezelwa lapho i-valve ivaliwe, okungandisa impilo yenkonzo yokupakisha, futhi ukupakisha kungashintshwa lapho ipayipi eliphambi kwe-valve lingaphansi kwengcindezi; ububi ukuthi i-torque yokushayela ye-valve inkulu, cishe ngokuphindwe kanye kunokugeleza okuvela phezulu, futhi amandla e-axial esiqwini se-valve makhulu, futhi i-valve stem kulula ukuyigoba. Ngakho-ke, le ndlela ngokuvamile ifaneleka kuphela kuma-stop valve amancane (ngaphansi kwe-DN50), futhi ama-stop valve angaphezu kwe-DN200 asebenzisa indlela ye-medium egeleza isuka phezulu. (Ama-stop valve kagesi ngokuvamile asebenzisa indlela ye-medium ephuma phezulu.) Ububi bendlela ye-medium ephuma phezulu buphambene kakhulu nendlela yokungena isuka phansi.