Zisebenza njani iivalvu zebhabhathane?

Ivalvu yebhabhathaneluhlobo lwevalvu esebenzisa idiski yokuvula nokuvala inxalenye ukuze ibuyisele malunga ne-90° ukuvula, ukuvala okanye ukulungisa isantya sokuhamba kwesixhobo. Ivalvu yeButterfly ayinasakhiwo silula nje kuphela, ubungakanani obuncinci, ubunzima obulula, ukusetyenziswa kwezinto eziphantsi, ubungakanani obuncinci bokufakelwa, i-torque encinci yokuqhuba, ukusebenza okulula nokukhawulezayo, kodwa ikwanomsebenzi olungileyo wokulawula ukuhamba kunye neempawu zokutywina ukuvala, kwaye yenye yeentlobo zeevalvu ezikhula ngokukhawuleza kwiminyaka elishumi edlulileyo. Iivalvu zeButterfly zisetyenziswa kakhulu. Uhlobo kunye nobungakanani bokusetyenziswa kwayo kuyaqhubeka nokukhula, kwaye kuphuhliswa kubushushu obuphezulu, uxinzelelo oluphezulu, ububanzi obukhulu, ukuqina okuphezulu, ubomi obude, iimpawu zokulawula ezigqwesileyo, kunye nemisebenzi emininzi yevalvu enye. Ukuthembeka kwayo kunye nezinye izalathisi zokusebenza zifikelele kwinqanaba eliphezulu.

Ngokusebenzisa irabha yokwenziwa enganyangekiyo ngamakhemikhali ukuzeiivalvu zebhabhathane, ukusebenza kweiivalvu zebhabhathaneiphuculwe. Ngenxa yokuba irabha yokwenziwa ineempawu zokuxhathisa ukugqwala, ukumelana nokukhukuliseka, ukuzinza okulinganayo, ukuqina okuhle, ukwakheka okulula, ixabiso eliphantsi, njl.njl., irabha yokwenziwa eneempawu ezahlukeneyo inokukhethwa ngokweemfuno ezahlukeneyo zokusetyenziswa ukuhlangabezana neemeko zokusebenza.iivalvu zebhabhathane.

Ngenxa yokuba i-polytetrafluoroethylene (PTFE) inokumelana nokugqwala okunamandla, ukusebenza okuzinzileyo, akukho lula ukuyiguga, i-coefficient ephantsi yokungqubana, kulula ukuyibumba, uzinzo olulinganayo, kwaye inokuphucula iipropati zayo ezibanzi ngokuzalisa nokongeza izixhobo ezifanelekileyo, izinto zokutywina ivalvu yebhabhathane ezinamandla angcono kunye ne-coefficient ephantsi yokungqubana zinokufunyanwa, kwaye imida yerabha yokwenziwa iyoyiswa, ngoko ke izinto zepolymeric zepolymer ezimelwe yi-PTFE kunye nezinto zayo zokuzalisa ezilungisiweyo zisetyenziswe kakhulu kwivalvu yebhabhathane, ukuze ukusebenza kwevalvu yebhabhathane kuphuculwe ngakumbi.Iivalvu zebhabhathaneNgenxa yobuninzi bamaqondo obushushu kunye noxinzelelo, kuye kwenziwa ukusebenza okuthembekileyo kokutywina kunye nobomi benkonzo ende.

Ukuze kuhlangatyezwane neemfuno zezicelo zoshishino ezifana nobushushu obuphezulu nobuphantsi, ukukhukuliseka okunamandla, kunye nobomi obude, iivalvu zebhabhathane zentsimbi ziye zaphuhliswa kakhulu. Ngokusetyenziswa kokumelana nobushushu obuphezulu, ukumelana nobushushu obuphantsi, ukumelana nokugqwala okunamandla, ukumelana nokukhukuliseka okunamandla, kunye nezixhobo ze-alloy ezinamandla aphezulu kwiivalvu zebhabhathane, iivalvu zebhabhathane zentsimbi ezitywiniweyo ziye zasetyenziswa kakhulu kwiindawo zoshishino ezifana nobushushu obuphezulu nobuphantsi, ukukhukuliseka okunamandla, kunye nobomi obude, kwaye iivalvu zebhabhathane ezinobubanzi obukhulu (9~750mm), uxinzelelo oluphezulu (42.0MPa) kunye nobubanzi bobushushu (-196~606°C) ziye zavela, kangangokuba ubuchwepheshe beevalvu zebhabhathane bufikelele kwinqanaba elitsha.

Xa ivalvu yebhabhathane ivuliwe ngokupheleleyo, inokumelana okuncinci kokuhamba kwamanzi. Xa ukuvulwa kuphakathi kwe-15°~70°, ingasetyenziselwa ukulawula ukuhamba kwamanzi ngendlela ebukhali, ngoko ke ukusetyenziswa kwevalvu yebhabhathane kuqheleke kakhulu kwicandelo lokulungiswa kobubanzi obukhulu.

Ngenxa yokuhamba okunokusulwa kwepleyiti yebhabhathane yevalvu yebhabhathane, uninzi lweevalvu zebhabhathane zingasetyenziselwa imidiya eneziqina ezixhonyiweyo. Ngokuxhomekeke kumandla esitywino, zingasetyenziselwa imidiya egudileyo neyi-granular.

Iivalvu zebhabhathane zifanelekile ukulawula ukuhamba kwamanzi. Ngenxa yokuba ukulahleka koxinzelelo lwevalvu yebhabhathane kumbhobho kukhulu, malunga nokuphindwe kathathu kunevalvu yesango, xa kukhethwa ivalvu yebhabhathane, impembelelo yokulahleka koxinzelelo kwenkqubo yombhobho kufuneka iqwalaselwe ngokupheleleyo, kwaye amandla epleyiti yebhabhathane yokuthwala uxinzelelo lwendlela yombhobho xa ivaliwe nawo kufuneka aqwalaselwe. Ukongeza, imida yobushushu bokusebenza apho izinto zesihlalo se-elastomeric zinokufakwa khona kubushushu obuphezulu nayo kufuneka iqwalaselwe.

Ivalvu yebhabhathane inobude obuncinci bokwakha kunye nokuphakama kwayo iyonke, isantya sokuvula nokuvala ngokukhawuleza, kunye neempawu ezilungileyo zokulawula ulwelo. Umgaqo wolwakhiwo lweevalvu zebhabhathane ufanelekile kakhulu ekwenzeni iivalvu ezinkulu. Xa kufuneka kusetyenziswe ivalvu yebhabhathane ukulawula isantya sokuhamba kwamanzi, kubalulekile ukukhetha ubungakanani obuchanekileyo kunye nohlobo lwevalvu yebhabhathane ukuze isebenze ngokufanelekileyo nangokufanelekileyo.

Ngokubanzi, kwi-throttling, ulawulo lolawulo kunye ne-medium yodaka, ubude besakhiwo bufutshane, isantya sokuvula nokuvala siyakhawuleza, kwaye kufuneka ukucima uxinzelelo oluphantsi (umahluko omncinci woxinzelelo), kwaye kuyacetyiswa i-butterfly valve. Ii-Butterfly valves zingasetyenziswa xa kukho uhlengahlengiso lweendawo ezimbini, itshaneli enobubanzi obuphantsi, ingxolo ephantsi, i-cavitation kunye ne-vaporization, ukuvuza okuncinci emoyeni, kunye ne-abrasive media. Phantsi kweemeko zokusebenza ezikhethekileyo, ukulungiswa kwe-throttling, okanye ukuvalwa okungqongqo, ukuwohloka okukhulu, ubushushu obuphantsi (cryogenic) kunye nezinye iimeko zokusebenza.