Ake sethule ukuthi uyini umehluko phakathi kwevalvu yomhlaba kanye ne-ivalvu yesango.
01
Isakhiwo
Uma isikhala sokufaka silinganiselwe, qaphela ukukhetha:
Iivalvu yesangoingathembela ekucindezelweni okuphakathi ukuze ivale ngokuqinile indawo yokuvala, ukuze kufezwe umphumela wokungavuzi. Lapho ivula futhi ivala, umongo wevalvu kanye nendawo yokuvala yesihlalo sevalvu zihlala zithintana futhi zikhuhlana, ngakho-ke indawo yokuvala kulula ukuyigqoka, futhi umaivalvu yesangosekuseduze nokuvala, umehluko wokucindezela phakathi kwengaphambili nengemuva lepayipi mkhulu kakhulu, okwenza indawo yokuvala iguge kakhulu.
Isakhiwo se-ivalvu yesangokuzoba yinkimbinkimbi kakhulu kune-globe valve, ngokombono wokubukeka, uma kufana ne-caliber, i-gate valve iphakeme kune-globe valve, kanti i-globe valve inde kune-ivalvu yesangoNgaphezu kwalokho,ivalvu yesangoihlukaniswe yaba yinduku ekhanyayo kanye nenduku emnyama. Amavalvu okuvala awakwenzi lokho.
Indlela esebenza ngayo
Uma ivalvu yomhlaba ivuliwe futhi ivaliwe, iba yisiqu esikhuphukayo, okungukuthi, uma isondo lesandla lijikeleziswa, isondo lesandla lizojikeleza futhi liphakame kanye nesiqu.ivalvu yesangoukuzungezisa isondo lesandla ukuze isiqu sevalvu senze ukunyakaza kokuphakamisa, futhi indawo yesondo lesandla ngokwalo ayishintshi.
Amazinga okugeleza ayahlukahluka, ngeamavalvu esangoidinga ukuvulwa okugcwele noma ukuvalwa okugcwele, kuyilapho ama-globe valve engafuni. I-globe valve inendlela ethile yokungena kanye neyokuphuma, kanyeivalvu yesangoayinazo izidingo zokungena kanye nesiqondiso sokuphuma.
Ngaphezu kwalokho, i-ivalvu yesangoinezimo ezimbili kuphela: ivuliwe ngokuphelele noma ivaliwe ngokuphelele, kanti ukushaywa kokuvulwa nokuvalwa kwepuleti lesango kukhulu kakhulu, futhi isikhathi sokuvulwa nokuvalwa side kakhulu. Ukushaywa kokunyakaza kwepuleti levalvu yevalvu yomhlaba kuncane kakhulu, futhi ipuleti levalvu yevalvu yomhlaba ingama endaweni ethile ishukuma ukuze kulungiswe ukugeleza.ivalvu yesangoingasetshenziswa kuphela ekunqanyulweni futhi ayinayo eminye imisebenzi.
Umehluko wokusebenza
I-globe valve ingasetshenziswa kokubili ekunqandeni nasekulawuleni ukugeleza. Ukumelana koketshezi kwe-globe valve kukhulu kakhulu, futhi kunzima kakhulu ukuyivula nokuvala, kodwa ngenxa yokuthi ibanga eliphakathi kwepuleti le-valve kanye nendawo yokuvala lifushane, ukushaya kokuvula nokuvala kufushane.
Ngobaivalvu yesangoingavulwa futhi ivalwe ngokuphelele kuphela, uma ivulwe ngokugcwele, ukumelana kokugeleza okuphakathi esiteshini somzimba we-valve cishe ku-0, ngakho-ke ukuvulwa nokuvalwa kwe-ivalvu yesangokuzosindisa kakhulu abasebenzi, kodwa ipuleti lesango likude kakhulu nendawo yokuvala, futhi isikhathi sokuvula nokuvala side.
04
Ukufakwa kanye nesiqondiso sokugeleza
Umphumela we-ivalvu yesangoIndlela yokugeleza kuzo zombili izinhlangothi iyafana, akukho mfuneko yendlela yokufaka yokungena kanye neyokuphuma, futhi i-medium ingageleza kuzo zombili izinhlangothi. I-globe valve idinga ukufakwa ngokuhambisana ngqo nesiqondiso esiphawulwe umcibisholo womzimba we-valve, futhi kukhona ilungiselelo elicacile endleleni yokungena kanye neyokuphuma kwe-globe valve, futhi indlela yokugeleza kwe-globe valve yamukelwa kusukela phezulu kuya phansi ngokusho "kokuguqulwa okuthathu" kwe-valve yaseShayina.
Ivalvu yokuvala iphansi ngaphakathi nangaphandle, futhi ngaphandle kukhona ipayipi elicacile elingekho ezingeni lesigaba esisodwa.ivalvu yesangoindlela yokugeleza isemgqeni ovundlile. Ukushaywa kwe-ivalvu yesangoinkulu kuneyevalvu yomhlaba.
Ngokombono wokumelana nokugeleza, uma ivuliwe ngokugcwele, ukumelana nokugeleza kwevalvu yesango kuncane, kanti ukumelana nokugeleza kwevalvu yokumisa umthwalo kukhulu. I-coefficient yokumelana nokugeleza evamileivalvu yesangocishe kungama-0.08~0.12, amandla okuvula nokuvala mancane, futhi i-medium ingageleza ngezindlela ezimbili. Ukumelana nokugeleza kwama-valve ajwayelekile embulunga kuphindwe kathathu kuya kahlanu kunokwe-amavalvu esango.Ukuvula nokuvala kudinga ukuphoqelelwa ukuvala ukuze kufezwe ukuvalwa, i-spool ye-globe valve ivaliwe ngokuphelele uma ithinta indawo yokuvala, ngakho-ke ukuguguleka kwendawo yokuvala kuncane kakhulu, ngenxa yokugeleza okukhulu kwamandla amakhulu okwengeza i-actuator ye-globe valve kufanele inake ukulungiswa kwendlela yokulawula i-torque.
Kunezindlela ezimbili zokufaka i-globe valve, enye ukuthi i-medium ingangena ngaphansi kwe-spool, inzuzo ukuthi ukupakisha akucindezelwa lapho i-valve ivaliwe, okungandisa impilo yenkonzo yokupakisha, futhi kungathatha indawo yokupakisha lapho ipayipi eliphambi kwe-valve lingaphansi kwengcindezi; Ububi ukuthi i-torque yokushayela ye-valve inkulu, cishe ngokuphindwe kanye kunokugeleza okuphezulu, amandla e-axial e-valve stem makhulu, futhi i-valve stem kulula ukuyigoba.
Ngakho-ke, le ndlela ngokuvamile ifaneleka kuphela kuma-globe valves amancane (DN50 noma ngaphansi), kanti ama-globe valves angaphezu kwe-DN200 asebenzisa i-medium egeleza evela phezulu. (Ama-globe valves kagesi ngokuvamile asebenzisa i-medium ukuze angene evela phezulu.) Ububi bendlela yokungena yemidiya evela phezulu buphambene kakhulu nendlela yokungena engezansi.
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Ukuvala
Ubuso bokuvala bevalvu yomhlaba buyihlangothi elincane le-trapezoidal le-core valve (bheka ngqo ukuma kwe-core valve), uma i-core valve iwela, ilingana nokuvala kwevalvu (uma umehluko wokucindezela mkhulu, vele, ukuvalwa akuqinile, kodwa umphumela wokuhlola awumubi),ivalvu yesangoivalwe eceleni kwepuleti lesango eliyinhloko le-valve, umphumela wokuvala awumuhle njenge-globe valve, futhi i-valve core ngeke iwe njenge-globe valve elingana nokuvala kwe-valve.
Isikhathi sokuthunyelwe: Ephreli-08-2023
