Amavalvu eglobhu, amavalvu esango, amavalvu ovemvane, amavalvu okuhlola kanye namavalvu ebhola konke kuyizingxenye zokulawula ezibalulekile ezinhlelweni zamapayipi ahlukahlukene namuhla. Wonke ama-valve ahlukile ngokubukeka, ukwakheka kanye nokusetshenziswa okusebenzayo. Kodwa-ke, i-valve yembulunga kanye ne-valve yesango inokufana okuthile ngokubukeka, futhi ngesikhathi esifanayo inomsebenzi wokuncishiswa epayipini, ngakho-ke kuyoba nabangane abaningi abangathintani kakhulu ne-valve ukuze kudideke kokubili. Eqinisweni, uma ubhekisisa kahle, umehluko phakathi kwevalve yembulunga nevalve yesango usemkhulu impela.
- Isakhiwo
Uma kunendawo elinganiselwe yokufaka, kubalulekile ukunaka ukukhethwa kwe:
I-valve yesango ingavalwa ngokuqinile ngendawo yokuvala ngokuncika ekucindezelweni okuphakathi, ukuze kuzuzwe umphumela wokungavuzi. Lapho uvula futhi uvala, i-spool ye-valve kanye nendawo yokuvala isihlalo se-valve zihlala zithintana futhi zigudlana, ngakho-ke indawo yokuvala kulula ukugqokeka, futhi lapho i-valve yesango isiseduze nokuvalwa, umehluko wengcindezi phakathi kwengaphambili nangemuva kwepayipi mkhulu kakhulu, okwenza indawo yokuvala igqoke kakhulu.
Isakhiwo se-valve yesango sizoba yinkimbinkimbi kakhulu kune-valve yembulunga, kusukela endaweni yokubuka, esimweni se-caliber efanayo, i-valve yesango iphakeme kune-valve yembulunga, futhi i-valve yembulunga yinde kune-valve yesango. Ngaphezu kwalokho, i-valve yesango ihlukaniswe yaba yinduku ekhanyayo nenduku emnyama. I-valve ye-globe ayikho.
- Sebenza
Lapho i-valve yembulunga ivulwa futhi ivaliwe, iwuhlobo lwesiqu esikhuphukayo, okusho ukuthi, isondo lesandla liyazungeziswa, futhi isondo lesandla lizokwenza ukujikeleza nokuphakamisa ukunyakaza kanye nesiqu se-valve. I-valve yesango iwukuguqula isondo lesandla, ukuze isiqu senze ukunyakaza kokuphakamisa, futhi isikhundla se-handwheel ngokwaso sihlala singashintshiwe.
Amazinga okugeleza ayahluka, namavalvu esango adinga ukuvalwa okugcwele noma okugcwele, kuyilapho ama-globe valve engafuni. I-valve yembulunga inendlela ecacisiwe yokungena nokuphuma, futhi i-valve yesango ayinazo izidingo zendlela yokungenisa nokuthumela ngaphandle.
Ngaphezu kwalokho, i-valve yesango ivuliwe kuphela ngokugcwele noma ivaliwe ngokugcwele izifunda ezimbili, ukuvulwa kwesango nokuvalwa kwe-stroke kukhulu kakhulu, isikhathi sokuvula nokuvala side. I-valve plate movement stroke of the globe valve incane kakhulu, futhi ipuleti levalvu levalvu yomhlaba lingama endaweni ethile linyakaze ukuze kulungiswe ukugeleza. I-valve yesango ingasetshenziselwa ukunqanyulwa kuphela futhi ayinawo omunye umsebenzi.
- Ukusebenza
I-valve ye-globe ingasetshenziselwa ukunqanyulwa nokulawula ukugeleza. Ukumelana noketshezi lwevalvu yembulunga kukhulu uma kuqhathaniswa, futhi kuba nzima kakhulu ukuvula nokuvala, kodwa ngenxa yokuthi ipuleti levalvu lifushane endaweni evalekayo, ukuvuleka nokuvala kufushane.
Ngenxa yokuthi i-valve yesango ingavuleka ngokugcwele futhi ivalwe ngokugcwele, lapho ivuliwe ngokugcwele, ukumelana nokugeleza okuphakathi esiteshini somzimba we-valve cishe ku-0, ngakho-ke ukuvulwa nokuvalwa kwe-valve yesango kuzosindisa kakhulu umsebenzi, kodwa ipuleti lesango likude nendawo yokubeka uphawu, futhi isikhathi sokuvula nokuvala side.
- Isiqondiso sokufaka nokugeleza
Umthelela we-valve yesango egeleza kuzo zombili izinkomba uyafana, futhi asikho isidingo sokuqondiswa kwe-inlet ne-outlet yokufaka, futhi okuphakathi kungageleza kuzo zombili izinkomba. Ivalvu yembulunga idinga ukufakwa ngokuhambisana ngokuqinile nesiqondiso sokuhlonza umcibisholo womzimba we-valve, futhi kukhona ukuhlinzekwa okucacile mayelana nesiqondiso sokungenisa nokuthekelisa kwe-valve yembulunga, futhi indlela yokugeleza kwevalvu yembulunga "ezintathu kuye" eShayina isuka phezulu iye phansi.
I-valve ye-globe iphansi futhi iphezulu, futhi kusukela ngaphandle kukhona amapayipi asobala angekho ezingeni lesigaba. Umgijimi wevalvu wesango usemugqeni ovundlile. I-stroke ye-valve yesango inkulu kunaleyo ye-valve yembulunga.
Ngokombono wokumelana nokugeleza, ukumelana nokugeleza kwe-valve yesango kuncane uma kuvuliwe ngokugcwele, futhi ukumelana nokugeleza kwe-valve yokumisa umthwalo kukhulu. I-coefficient yokumelana nokugeleza kwe-valve yesango evamile imayelana no-0.08 ~ 0.12, amandla okuvula nokuvala mancane, futhi okuphakathi kungageleza ngezindlela ezimbili. Ukumelana nokugeleza kwama-valve ajwayelekile okuvala izikhathi ezi-3-5 kunama-valve esango. Lapho uvula futhi uvala, kuyadingeka ukuphoqa ukuvalwa ukuze kuzuzwe uphawu, i-valve spool ye-valve yomhlaba ixhumene nendawo yokuvala lapho ivalwe ngokuphelele, ngakho-ke ukugqokwa kwendawo yokubeka uphawu kuncane kakhulu, ngoba ukugeleza kwamandla amakhulu kudinga ukwengeza i-actuator Ye-valve yomhlaba kufanele inake ukulungiswa kwendlela yokulawula i-torque.
I-valve ye-globe inezindlela ezimbili zokufaka, enye ukuthi i-medium ingangena isuka ngaphansi kwe-valve spool, inzuzo ukuthi lapho i-valve ivaliwe, ukupakisha akukho ngaphansi kwengcindezi, impilo yesevisi yokupakisha inganwetshwa, futhi umsebenzi wokushintsha ukupakisha ungenziwa ngaphansi kwengcindezi epayipini eliphambi kwe-valve; okungalungile ukuthi i-torque yokushayela ye-valve inkulu, cishe izikhathi ezingu-1 zokugeleza okuphezulu, futhi amandla e-axial we-valve stem makhulu, futhi i-valve stem kulula ukugoba.
Ngakho-ke, le ndlela ngokuvamile ifaneleka kuphela ama-valve eglobhu anobubanzi obuncane (i-DN50 noma ngaphansi), futhi amavalvu embulunga angaphezu kwe-DN200 akhethelwa indlela yemidiya egeleza ivela phezulu. (Amavalvu okuvala kagesi ngokuvamile asebenzisa i-medium ukuze angene phezulu.) Ububi bendlela imidiya engena ngayo isuka phezulu iphambene ncamashi nendlela engena ngayo ngezansi.
- Ukubeka uphawu
Indawo yokuvala i-valve yembulunga iyihlangothini elincane le-trapezoidal le-valve core (ikakhulukazi ukubukeka kwe-valve core), lapho i-valve core iwa, ilingana nokuvalwa kwe-valve (uma umehluko wengcindezi umkhulu, yiqiniso, ukuvala akuqinile, kodwa umphumela wokuhlehla awumubi), i-valve ohlangothini lwesango luvalwe njengomphumela omuhle we-valve. i-globe valve, futhi i-valve core ngeke iwe njenge-valve yembulunga.
Isikhathi sokuthumela: Apr-01-2022
