Ake sethule bona ngimuphi umehluko phakathi kwevalvu ye-globe kanye ne-ivalvu yesango.
01
Isakhiwo
Lokha isikhala sokufaka silinganiselwe, tjheja ukukhetha:
Iivalvu yesangoangathembela emfuthweni ophakathi ukuvala ngokuqinileko indawo yokuvala, ukwenzela bona kube nomphumela wokungavuzi. Lokha nakuvulwa begodu kuvalwa, umgogodla wevalvu kanye nendawo yokuvala yesihlalo sevalvu kuhlala kuthintana begodu kuhlikihlana, ngalokho indawo yokuvala kulula ukugqoka, begodu lokhaivalvu yesangoiseduze nokuvala, umehluko wokugandeleleka hlangana kwangaphambili nangemuva kwepayipi mkhulu khulu, okwenza bona indawo yokuvala iguge khulu.
Isakhiwo seivalvu yesangokuzokuba yinkimbinkimbi ukudlula ivalvu ye-globe, ngokuya ngokubukeka, endabeni ye-caliber efanako, i-valve yesango iphezulu kune-globe valve, begodu i-globe valve yinde ukudlulaivalvu yesango. Ngaphezu kwalokho, iivalvu yesangoihlukaniswe yaba yinduku ekhanyako nenduku emnyama. Amavalvu wokuvala awakwenzi njalo.
Isebenza njani
Lokha ivalvu ye-globe nayivulwa begodu ivalwa, kuba siqu esikhuphukako, okutjho bona, lokha isondo lezandla nalijikeleziswako, isondo lesandla lizokujikeleza begodu liphakame nesiqu. Iivalvu yesangokukuthi ujikelezise isondo lesandla ukwenza bona isiqu sevalvu senze ukunyakaza kokuphakamisa, begodu ubujamo besondo lesandla ngokwalo lingatjhuguluki.
Amazinga wokugeleza ayahluka, ngeamavalvu wesangookutlhoga ukuvulwa okuzeleko nofana ukuvalwa okuzeleko, kuthi amavalvu we-globe angakwenzi lokho. Ivalvu ye-globe inendawo ekhethiweko yokungena nokuphuma, begoduivalvu yesangoayikho iimfuneko zokungena nokuphuma.
Ngaphezu kwalokho, iivalvu yesangoinemibuso emibili kwaphela: ukuvuleka okuzeleko nofana ukuvala okuzeleko, begodu ukuvulwa nokuvalwa kwepuleti lesango kukhulu khulu, begodu isikhathi sokuvula nokuvala side. Ukunyakaza kwepuleti yevalvu yevalvu ye-globe mncani khulu, begodu ipuleti ye-valve ye-globe valve ingajama endaweni ethileko ekunyakaziseni ukulungiswa kokugeleza. Iivalvu yesangoingasetjenziselwa ukunquma kwaphela begodu ayinayo eminye imisebenzi.
Umehluko wokusebenza
Ivalvu ye-globe ingasetjenziselwa kokubili ukusika nokulawulwa kokugeleza. Ukujamelana noketshezi kwevalvu ye-globe kukhulu, begodu kunzima ukuyivula nokuyivala, kodwana ngombana ibanga eliphakathi kwepuleti levalvu nendawo yokuvala lifitjhani, ukuvula nokuvala kufitjhani.
Ngombana iivalvu yesangoingavulwa begodu ivalwe ngokupheleleko kwaphela, lokha nayivuliwe ngokupheleleko, ukujamelana nokugeleza okuphakathi emzileni womzimba wevalvu kupheze kube ngu-0, ngalokho ukuvulwa nokuvalwa kweivalvu yesangokuzokonga umsebenzi, kodwana ipuleti lesango likude nendawo yokuvala, begodu isikhathi sokuvula nokuvala side.
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Ukufakwa kanye nendlela yokugeleza
Umphumela weivalvu yesangoindlela yokugeleza kizo zombili iindlela iyafana, akukho mfuneko yendlela yokungena neyokuphuma yokufaka, begodu umphakathi ungageleza kizo zombili iinhlangothi. Ivalvu ye-globe itlhoga ukufakwa ngokuya ngokuqinileko ngendlela ephawulwe mcibisholo womzimba we-valve, begodu kunomthetho ocacileko wendlela yokungena nokuphuma kwe-globe valve, begodu indlela yokugeleza kwe-globe valve yamukelwa ukusuka phezulu ukuya phasi ngokuya “ngokutjhuguluka okuthathu” kwe-valve ye-China.
Ivalvu yokuvala iphansi ngaphakathi begodu iphezulu ngaphandle, begodu ukusuka ngaphandle kunephayiphu ekhanyako engekho ezingeni lesigaba sinye. Iivalvu yesangoindlela yokugeleza isemugqeni ovundlileko. Isifo se-stroke seivalvu yesangomkhulu kunaleyo ye-globe valve.
Ngokombono wokujamelana nokugeleza, lokha nakuvulekile ngokupheleleko, ukujamelana nokugeleza kwevalvu yesango kuncani, begodu ukujamelana nokugeleza kwevalvu yokumisa umthwalo kukhulu. I-coefficient yokujamelana nokugeleza okujayelekilekoivalvu yesangoingaba ngu-0.08~0.12, amandla wokuvula nokuvala mancani, begodu umkhakha ungageleza ngeendlela ezimbili. Ukujamelana nokugeleza kwamavalvu we-globe ajayelekileko kuphindwe ka-3-5 kuneamavalvu wesango.Ukuvula nokuvala kutlhoga ukugandeleleka ukuvala ukufezekisa ukuvala, i-spool ye-globe valve ivalwe ngokupheleleko lokha nayithintana nendawo yokuvala, ngalokho ukuguga kwendawo yokuvala kuncani khulu, ngebanga lokugeleza okukhulu kwamandla amakhulu ukufaka i-actuator ye-globe valve kufanele unake indlela yokulawula i-torque yokulungisa.
Kuneendlela ezimbili zokufaka ivalvu ye-globe, enye kukuthi umtjhini ungangena ngaphasi kwe-spool, ubuhle kukuthi ukupakisha akukagandelelwa lokha i-valve nayivaliweko, okungangezelela ipilo yokusebenza kwe-packing, begodu kungathatha indawo yokupakisha lokha iphayiphi engaphambi kwe-valve ingaphasi kwengcindezi; Ububi kukuthi amandla wokutjhayela wevalvu makhulu, okuyi-1 ye-flow ephezulu, amandla we-axial wesiqu sevalvu makhulu, begodu isiqu sevalvu kulula ukugoba.
Ngalokho-ke, indlela le ivamise ukulungele amavalvu we-globe anobubanzi obuncani (i-DN50 nofana ngaphasi), begodu ama-valve we-globe angaphezulu kwe-DN200 asebenzisa umtjhini ogelezako ukusuka phezulu. (Amavalvu we-globe kagesi avamise ukusebenzisa indlela yokungena ukusuka phezulu.) Ububi bendlela yokungena kwendlela ukusuka phezulu buphambene ngqo nendlela yokungena ngaphasi.
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Ukuvala
Indawo yokuvala ye-globe valve yihlangothi elincani le-trapezoidal ye-valve core (qalisisa khulukhulu ubujamo be-valve core), lokha i-valve core nayiwela phasi, kuyalingana nokuvalwa kwe-valve (nangabe umehluko wokugandeleleka mkhulu, nakanjani, ukuvalwa akukaqini, kodwana umphumela wokuhlola awusimbi),ivalvu yesangoivalwe ngehlangothini lepuleti lesango lomgogodla wevalvu, umphumela wokuvala awusihle njengevalvu ye-globe, begodu umgogodla wevalvu angeze wawa njengevalvu ye-globe efana nokuvalwa kwevalvu.
Isikhathi sokuposa: Apr-08-2023
