Butterfly Valve Introduction

Intshayelelo:

Ivalve yebhabhathaneiphuma kusapho lweevalvu ezibizwaiivalvu zekota. Ekusebenzeni, i-valve ivuleke ngokupheleleyo okanye ivaliwe xa i-disc ijikeleza ikota. "Ibhabhathane" yidiski yentsimbi efakwe kwintonga. Xa i-valve ivaliwe, i-disc iguqulwa ukuze ivalwe ngokupheleleyo kwipaseji. Xa i-valve ivuleke ngokupheleleyo, i-disc ijikeleziswa kwikota yekota ukwenzela ukuba ivumele ukudlula okungathintelwanga kolwelo. Ivalve isenokuthi ivulwe ngokunyukileyo ukuqukuqela.

Kukho iindidi ngeendidi zeevalvu zebhabhathane, nganye ilungiselelwe iingcinezelo ezahlukeneyo kunye nokusetyenziswa okwahlukileyo. Ivalve yebhabhathane engu-zero-offset, esebenzisa ukuguquguquka kwerabha, inomlinganiselo ophantsi woxinzelelo. I-valve ye-butterfly esebenza kakuhle kabini, esetyenziswa kwiinkqubo zoxinzelelo oluphezulu kancinci, ihlanjululwe ukusuka kumgca ophakathi wesihlalo sediski kunye nokutywinwa komzimba (i-offset enye), kunye nomgca ophakathi webhore (i-offset ezimbini). Oku kudala intshukumo yecam ngexesha lokusebenza ukuphakamisa isihlalo ngaphandle kwetywina okukhokelela ekukhuhlaneni okuncinci kunoko kwenziwa kuyilo lwe-zero offset kunye nokunciphisa utyekelo lwaso lokunxiba. Ivalve ifanelene kakhulu neenkqubo zoxinzelelo oluphezulu yivalve yebhabhathane ephindwe kathathu. Kule valve i-disc seat i-axis yoqhagamshelwano i-offset, eyenza ukuphelisa unxibelelwano lokutyibilika phakathi kwediski kunye nesihlalo. Kwimeko yeevalvu eziphindwe kathathu isihlalo senziwe ngesinyithi ukuze sitshintshwe njengokufikelela kwi-bubble tight shut-off xa udibana nediski.

Iintlobo

Iivalve zebhabhathane ezigxininisiweyo- olu hlobo lwevalve lunesihlalo serubha esinamandla kunye nediski yensimbi.
Iivalvu zebhabhathane eziphindwe kabini-eccentric(i-valve ye-butterfly ephezulu okanye i-double-offset butterfly valves) - uhlobo oluhlukeneyo lwezinto ezisetyenziselwa isihlalo kunye nediski.
Iivalvu zebhabhathane ezintathu-eccentric(iivalvu zebhabhathane ezine-fiberfly ezintathu) - izihlalo zine-laminated okanye uyilo lwesihlalo sesinyithi esiqinileyo.

Iivalvu zebhabhathane zesimbo se-wafer

Iivalufa yebhabhathane isimboyenzelwe ukugcina itywina ngokuchasene nokwahluka koxinzelelo lwe-bi-directional ukuthintela nakuphi na ukubuya umva kwiinkqubo ezenzelwe ukuhamba ngokungafaniyo. Ikwenza oku ngetywina eliqinileyo; oko kukuthi, i-gasket, i-o-ring, i-precision machined, kunye nobuso bevalve esicaba kumacala angasentla nasezantsi evalve.

Lug-style butterfly valve

Iivalve zesimbo seLugbafake imisonto kumacala omabini omzimba wevalvu. Oku kuvumela ukuba bafakwe kwisistim usebenzisa iiseti ezimbini zeebholiti kwaye akukho nuts. Ivalve ifakwe phakathi kweeflange ezimbini kusetyenziswa isethi eyahlukileyo yeebholiti kwiflange nganye. Olu cwangciso luvumela naliphi na icala lenkqubo yemibhobho ukuba liqhawulwe ngaphandle kokuphazamisa elinye icala.

Ivalve yebhabhathane yohlobo lwelug esetyenziswa kwinkonzo yokuphela kofileyo inomlinganiselo ophantsi woxinzelelo. Umzekelo, ivalve yebhabhathane efakwe phakathi kweeflange ezimbini ine-1,000 kPa (150 psi) yokukala uxinzelelo. Ivalve efanayo efakwe ngeflange enye, kwinkonzo efileyo, ine-520 kPa (75 psi) yokukala. Iivalve ezilugayiweyo ziyakwazi ukumelana neekhemikhali kunye nezinyibilikisi kwaye ziyakwazi ukumelana namaqondo obushushu ukuya kutsho kuma-200 °C, nto leyo eyenza ibe sisisombululo esiguquguqukayo.

Ukusetyenziswa kwishishini

Kwimizi-mveliso yamayeza, iikhemikhali, kunye nokutya, ivalve yebhabhathane isetyenziselwa ukuphazamisa ukuhamba kwemveliso (eqinile, engamanzi, igesi) ngaphakathi kwinkqubo. Iivalvu ezisetyenziswa kula mashishini zidla ngokuveliswa ngokwezikhokelo ze-cGMP (inkqubo yokuvelisa ilungileyo ngoku). Iivalvu zebhabhathane zidla ngokutshintsha iivalvu zebhola kumashishini amaninzi, ngakumbi i-petroleum, ngenxa yeendleko eziphantsi kunye nokulula ukuyifaka, kodwa imibhobho eneevalvu zebhabhathane ayinako 'ihagu' ukuze icocwe.