Umehluko phakathi globe valve kanye valve isango, indlela ukukhetha?

Ake setfule kutsi yini umehluko emkhatsini wevalve yemhlaba kanye neIvalvu yesango.

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Kwakhiwa

Uma sikhala sekufaka sincane, naka lokukhetsiwe:

IIvalvu yesangokungatsembela kucindzeteleka lokusemkhatsini kuvala ngalokucinile indzawo yekuvala, kute kuzuzwe umphumela wekungavuzi. Uma kuvulwa nekuvalwa, umgogodla wevalve kanye nendzawo yekuvala yesihlalo sevalve kuhlala kuchumana futsi kuhlikihlana, ngako-ke indzawo yekuvala kulula kuyigcoka, futsi uma iIvalvu yesangosekusondzele ekuvalweni, umehluko wekucindzeteleka emkhatsini wangaphambili nangemuva kwephayiphi mkhulu kakhulu, lokwenta kutsi indzawo yekuvala igcoke kakhulu.

Isakhiwo seIvalvu yesangokutawuba yinkimbinkimbi kakhulu kune-valve ye-globe, kusuka endzaweni yekubukeka, esimeni se-caliber lefanako, i-valve yesango iphakeme kune-valve ye-globe, futsi i-valve ye-globe yindze kune-Ivalvu yesango. Ngetulu kwaloko, iIvalvu yesangoihlukaniswe ibe yindvuku lekhanyako kanye nendvuku lemnyama. Emavalvu ekuvala awakwenti loko.

Indlela lesebenta ngayo

Uma ivalve ye globe ivulwa futsi ivalwe, sicu lesikhuphukako, lokusho kutsi uma lisondvo lesandla lijikeleta, lelisondvo lesandla litawujikeleta bese liphakamisa nesicu. IIvalvu yesangokujikeleta lisondvo lesandla kwenta sicu sevalve sente kuhamba kwekuphakamisa, futsi indzawo yelisondvo lesandla ngokwayo ihlala ingashintjwa.

Emazinga ekugeleta ayahlukahluka, ngeemavalvu esangoletidzinga kuvuleka lokuphelele noma kuvalwa lokuphelele, kantsi emavalvu emhlabatsi akakwenti. I-valve ye-globe inendlela lecacisiwe yekungena nekuphuma, futsiIvalvu yesangoayinato tidzingo tendlela yekungena nekuphuma.

Ngetulu kwaloko, iIvalvu yesangokuphela unemibuso lemibili: kuvuleka ngalokuphelele noma kuvalwe ngalokuphelele, futsi stroke sekuvula nekuvala ipuleti lesango sikhulu kakhulu, futsi sikhatsi sekuvula nekuvala sidze. I-stroke yekuhamba kwepuleti yevalve yevalve yemhlaba mncane kakhulu, futsi ipuleti levalve yevalve yemhlaba ingama endzaweni letsite ekunyakatelweni kwekulungisa kugeleza. IIvalvu yesangoingasetjentiswa kuphela truncation futsi ayinayo leminye imisebenti.

Umehluko wekusebenta

I valve globe ingasetjentiswa kokubili cut-off kanye umtsetfo ukugeleza. Kumelana kwemanti kwe valve ye globe kukhulu kakhulu, futsi kusebenta kakhulu kuvula nekuvala, kepha ngenca yekutsi libanga emkhatsini welipuleti le valve kanye nendzawo yekuvala lifishane, kuvula nekuvala stroke kufishane.

Ngobe iIvalvu yesangoingavulwa kuphela futsi ivalwe ngalokuphelele, uma ivulwe ngalokuphelele, kumelana kwekugeleta lokusemkhatsini emseleni wemtimba wevalve kucishe kube ngu-0, ngako-ke kuvulwa nekuvalwa kwe-Ivalvu yesangokutawuba kugcina umsebenti kakhulu, kepha ipuleti lesango likhashane nendzawo yekuvala, futsi sikhatsi sekuvula nekuvala sidze.

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Kufakwa kanye nendlela yekugeleza

Umphumela wekutsiIvalvu yesangosicondziso sekugeleza kuto totimbili tindlela siyafana, kute sidzingo sendlela yekungena nekuphuma yekufakwa, futsi umkhatsi ungageleta kuto totimbili tindlela. I-valve ye-globe idzinga kufakwa ngekuhambisana ngalokucinile nendlela lephawulwe ngumcibisholo wemtimba we-valve, futsi kunekuhlinzekwa lokucacile ngendlela yekungena nekuphuma kwe-valve ye-globe, futsi indlela yekugeleza ye-valve ye-globe yamukelwa kusuka etulu kuya phansi ngekuya kwe “valve letsatfu yetingucuko” yaseChina.

Le valve yekuvala iphansi ngekhatsi futsi iphakeme ngaphandle, futsi kusuka ngaphandle kuneliphayiphi lelicacile lelingekho esigabeni sesigaba sinye. IIvalvu yesangoindlela yekugeleza isemugceni lovundlile. Sifo sekufa kweIvalvu yesangomkhulu kunaleyo yevalve yemhlaba.

Kusuka kumbono wekumelana nekugeleta, uma kuvulekile ngalokuphelele, kumelana nekugeleta kwevalve yesango kuncane, futsi kumelana nekugeleta kwevalve yekumisa umtfwalo kukhulu. I coefficient yekumelana nekugeleta kwetintfo letivamileIvalvu yesangokungaba ngu 0.08 ~ 0.12, emandla ekuvula nekuvala mancane, futsi lokusemkhatsini kungageleta ngetindlela letimbili. Kumelana kwekugeleza kwemavalvu e-globe evamile kuphindvwe ka-3-5 kutsi .emavalvu elisango.Kuvula nekuvala kudzingeka kutsi kuphocelelelwe kuvala kuze kuzuzwe kuvalwa, i-spool ye-valve ye-globe ivaliwe ngalokuphelele uma itsintsana nendzawo yekuvala, ngako-ke kugcoka kwendzawo yekuvala kuncane kakhulu, ngenca yekugeleza lokukhulu kwemandla lamakhulu ekwengeta actuator ye-valve ye-globe adjust kufanele unake i-torjust ye-valve.

Kukhona tindlela letimbili tekufaka i-valve ye-globe, yinye kutsi le-medium ingangena kusuka ngaphansi kwe-spool, inzuzo kutsi lokupakisha akucindzetelwa uma i-valve ivaliwe, lokungenta kutsi kube nemphilo yekusebenta kwekupakisha, futsi kungatsatsa sikhundla sekupakisha uma liphayiphi leliphambi kwe-valve lingaphansi kwemfutfo; Lokungakalungi kutsi i-torque yekushayela ye-valve inkhulu, lecishe ibe tikhatsi letingu-1 leto tekugeleta lokungetulu, emandla e-axial esicu se-valve makhulu, futsi sicu se-valve kulula kugoba.

Ngakoke, lendlela ivame kulungele kuphela emavalvu emhlaba lanebubanti lobuncane (DN50 noma ngaphansi), bese emavalvu emhlaba langetulu kwe DN200 asebentisa lendzawo legeletako lesuka ngetulu. (Emavalvu emhlaba wegezi avame kusebentisa indlela lesemkhatsini yekungena kusuka ngetulu.) Lokungakalungi kwendlela yekungena kwetindzaba kusuka ngetulu kuphambene ncamashi nendlela yekungena lephansi.

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Kuvala

Indzawo yekuvala yevalve yemhlaba luhlangotsi loluncane lwe-trapezoidal lwemgogodla wevalve (ikakhulukati buka kwakheka kwemgogodla wevalve), uma umgogodla wevalve sewuwa, kulingana nekuvalwa kwevalve (uma umehluko wekucindzeteleka mkhulu, vele, kuvalwa akucinile, kepha umphumela wekuhlola awubi .Ivalvu yesangoivalwe eceleni kwepuleti lesango le-valve core, umphumela wekuvala awukalungi njenge-valve ye-globe, futsi umgogodla we-valve ngeke uwe njenge-valve ye-globe lelingana nekuvalwa kwe-valve.