Ukukhetha imowudi ye-valve, ukufunda isisombululo sokuvuza kwevalve

Ukukhetha imowudi ye-valve, ukufunda isisombululo sokuvuza kwevalve

Ukukhetha imowudi yeValve kusekelwe kwi:
1) uhlobo lwevalve, iinkcukacha kunye nesakhiwo.
2) umzuzu wokuvula kunye nokuvalwa kwevalve (uxinzelelo lombhobho, umahluko omkhulu woxinzelelo lwevalve), ukutyhala.
3) Thelekisa ubushushu obuphezulu be-ambient kunye nobushushu bolwelo.
4) Imo kunye nobuninzi bokusetyenziswa.
5) Ukuvula nokuvala isantya kunye nexesha.
6) I-Stem diameter, i-screw moment, i-rotation direction.
7) Imo yoqhagamshelwano.
8) Iiparamitha zomthombo wamandla: umbane wombane wombane, inombolo yesigaba, i-frequency; Uxinzelelo lomthombo womoya womoya; Uxinzelelo oluphakathi lweHydraulic.
9) Ingqwalasela ekhethekileyo: ubushushu obuphantsi, i-anti-corrosion, i-explosion-proof, i-waterproof, ukuthintela umlilo, ukukhuselwa kwemitha, njl.
Kuzo zonke izixhobo zevalve actuation, izixhobo zombane kunye nefilim zomoya zezona zisetyenziswa kakhulu. Izixhobo zombane zisetyenziswa ikakhulu kwiivalvu zesekethe ezivaliweyo; Isixhobo somoya esincinci sefilimu sisetyenziswa ikakhulu kwivalve yolawulo. I-electromagnetic drive isetyenziswa ikakhulu kwiivalvu ezincinci zedayamitha. I-bellows drive efakwe ngaphakathi isetyenziswa ikakhulu kwi-disc stroke valves kunye nemidiya eyingozi kunye netyhefu. Kodwa uluhlu lwayo olusetyenziswayo ludla ngokulinganiselwe sisixhobo esincedisayo somqhubi olawula ukuhanjiswa okuphambili.
Imfuno ekhethekileyo ye-valve actuation kukukwazi ukunciphisa i-torque okanye i-axial force. Isixhobo sombane sevalve sisebenzisa ukudityaniswa kwetorque. Kwizixhobo ze-hydraulic kunye ne-pneumatic drive, amandla ahlobeneyo axhomekeke kwindawo esebenzayo ye-diaphragm okanye i-piston kunye noxinzelelo lwe-medium medium. Intwasahlobo ingasetyenziselwa ukunciphisa amandla asetyenziswayo.
Izisombululo zokuvuza kwevalvu
Ukuvuza kwevalve kuye kwaba ngomnye wemithombo ephambili yokuvuza kwisixhobo, ngoko ke kubaluleke kakhulu ukuba kuphuculwe amandla okuthintela ukuvuza kwevalve, kuthintelwe ukuvuza kwevalve, kufuneka kulawule ulwazi olusisiseko lwamacandelo okutywinwa kwevalve ukunqanda ukuvuza kwemidiya —— ukutywinwa, le yeyona nto iphambili.
Ukutywinwa kukuthintela ukuvuza, ngoko umthetho-siseko wokutywinwa kwevalvu ukwakukuthintela uphando lokuvuza. Kukho izinto ezimbini eziphambili ezibangela ukuvuza, enye yeyona nto ibalulekileyo echaphazela ukusebenza kokutywinwa, oko kukuthi, kukho umsantsa phakathi kwesibini sokutywina, enye kukho umahluko woxinzelelo phakathi kwamacala amabini esibini sokutywina.
Umthetho-siseko wokutywinwa kwevalve ukwaphuma kulwelo lokutywinwa, ukutywinwa kwerhasi, umgaqo ovuzayo wokutywina umjelo kunye nokutywinwa kwevalve kunye neminye imiba emine ekufuneka ihlalutywe.
1. Ukuqina kolwelo
Ukuqina kolwelo kumiselwa yi-viscosity kunye noxinzelelo lwangaphezulu. Xa i-valve evuzayo i-capillary izaliswe yigesi, ukuxinezeleka kwendawo kunokugxotha okanye kutsale ulwelo kwi-capillary. Kwaye oko kwenza i-engile ye-tangent. Xa i-Angle ye-tangent ingaphantsi kwe-90 °, i-liquid ifakwe kwi-tube ye-capillary, kwaye ukuvuza kwenzeka.
Isizathu sokuvuza silele kwiipropati ezahlukeneyo ze-medium. Zama ngemidiya eyahlukeneyo, phantsi kwemeko efanayo, uya kufumana iziphumo ezahlukeneyo. Ungasebenzisa amanzi, umoya, i-kerosene, njl. Xa i-angle ye-tangent inkulu kune-90 °, ukuvuza kuya kwenzeka.
Ngenxa yobudlelwane kunye neoli okanye ifilimu ye-wax kwindawo yesinyithi. Nje ukuba ezi filimu zangaphezulu zinyibilikisiwe, iimpawu zomphezulu wesinyithi zitshintsha, kunye nolwelo, obelugxothiwe ngaphambili, luya kumanzisa umphezulu kwaye luvuze. Ngokubhekiselele kule meko ingentla, ngokwefomula yePoisson, injongo yokuthintela ukuvuza okanye ukunciphisa ukuvuza kunokufezekiswa phantsi kwemeko yokunciphisa ububanzi be-capillary kunye ne-viscosity ephakathi.
2. Ukuqina kwegesi
Ngokutsho kwefomula yePoisson, ukuqina kwegesi kuhambelana neemolekyuli zegesi kunye ne-viscosity yegesi. Ukuvuza kuhambelana ngokungafaniyo nobude be-capillary kunye ne-viscosity yegesi, kunye nokulingana nobubanzi be-capillary kunye namandla okuqhuba. Xa i-diameter ye-capillary kunye ne-avareji ye-degrees yenkululeko yee-molecule zegesi zifana, ii-molecule zegesi ziya kuhamba kwi-capillary kunye ne-free motion motion.
Ngoko ke, xa sisenza uvavanyo lokutywinwa kwevalve, i-medium kufuneka ibe ngamanzi ukuze idlale indima yokutywinwa, kunye nomoya okanye igesi ayinakudlala indima yokutywinwa.
Nangona sinciphisa i-capillary diameter ngaphantsi kwe-molecule yegesi nge-deformation yeplastiki, ukuhamba kwegesi akukwazi ukumiswa. Isizathu sesokuba irhasi isenako ukusasazeka ngeendonga zentsimbi. Ke xa sisenza uvavanyo lwerhasi, kufuneka sibe ngqongqo ngakumbi kunovavanyo lolwelo.
3. Umgaqo wokutywina wejelo lokuvuza
Isitywina sevalve yenziwe ngamacandelo amabini, uburhabaxa, obuqulunqwe buburhabaxa bokungalingani okusasazeka kumphezulu weform wave kunye nokukhanya komgama phakathi kweencopho. Ngaphantsi kwemeko yokuba amandla e-elastiki ezinto ezininzi zetsimbi aphantsi kwilizwe lethu, kufuneka sinyuse iimfuno eziphezulu zamandla oxinzelelo lwezixhobo zetsimbi, oko kukuthi, amandla oxinzelelo lwezinto kufuneka agqithise ukuqina kwawo, ukuba sifuna ukufikelela imo yokutywina. Ke ngoko, ekuyilweni kwevalve, isibini sokutywina sidityaniswe nobunzima obuthile bokungafani.
4. Iperi yevalve yokutywina
Iperi yevalve yokutywina yinxalenye yesitulo sesivalo kunye nokuvala okuvalayo xa zidibene. Indawo yokutywinwa yesinyithi ixhomekeke kumonakalo kwi-clamping media, i-corrosion media, i-particle yokugqoka, i-cavitation kunye nokuguguleka ngexesha lokusetyenziswa.
Ngokomzekelo, ukugqoka amaqhekeza, ukuba iinqununu zokugqoka kunokuba zincinci, xa indawo yokutywina iqhutywe kuyo, ukuchaneka komgangatho kuya kuphuculwa, kwaye akuyi kuba kubi. Ngokuchasene noko, kuya kwenza ukuchaneka komphezulu kube ngakumbi. Ngoko ke, ekukhethweni kweengqungquthela zokugqoka, izinto eziphathekayo, imeko yokusebenza, i-lubricity kunye ne-corrosion yendawo yokutywina kufuneka iqwalaselwe ngokubanzi. Njengamaqhekeza okugqoka, xa sikhetha izitywina, kufuneka siqwalasele ngokubanzi izinto ezahlukeneyo ezichaphazela ukusebenza kwazo ukuze zidlale umsebenzi wokuthintela ukuvuza. Ngoko ke, izinto ezichasayo ukubola, ukutshatyalaliswa kunye nokukhukuliseka kufuneka kukhethwe. Ngaphandle koko, ukungabikho kwayo nayiphi na enye yeemfuno kuya kwenza ukutywinwa kwayo kuncitshiswe.
Zininzi izinto ezichaphazela isitywina sevalve, ikakhulu ezi zilandelayo:
1. Ukutywinwa kwesakhiwo se-accessory
Ngaphantsi kokutshintsha kweqondo lokushisa okanye ukutywinwa kwamandla, isakhiwo sesibini sokutywina siya kutshintsha. Kwaye olu tshintsho luya kuchaphazela kwaye lutshintshe isibini sokutywina phakathi kwamandla, ukwenzela ukuba ukusebenza kwesitywina sevalve kuncitshiswe.
Ke ngoko, xa sikhetha amatywina, kufuneka sikhethe amatywina ane-elastic deformation. Ngexesha elifanayo, nikela ingqalelo kububanzi bendawo yokutywina. Isizathu kukuba umphezulu woqhagamshelwano wesibini sokutywinwa awuhambelani ngokupheleleyo. Xa ububanzi bomphezulu wokutywina bunyuka, kuyimfuneko ukwandisa amandla afunekayo ukutywinwa.
2. Uxinzelelo oluthile lokutywinwa kwendawo
Uxinzelelo oluthile lwendawo yokutywina luchaphazela ukusebenza kokutywinwa kunye nobomi benkonzo yevalve.
Ke ngoko, uxinzelelo lomphezulu wokutywina luyinto ebaluleke kakhulu. Phantsi kweemeko ezifanayo, uxinzelelo oluninzi kakhulu luya kubangela umonakalo wevalvu, kodwa uxinzelelo oluncinci kakhulu luya kubangela ukuvuza kwevalvu. Ngoko ke, kufuneka siqwalasele ngokupheleleyo uxinzelelo oluthile kuyilo olufanelekileyo.
3. Iipropati ezibonakalayo ze-medium
Iipropati ezibonakalayo ze-medium nazo zichaphazela ukusebenza kwevalve yesitywina. Ezi mpawu zomzimba ziquka ubushushu, i-viscosity, kunye ne-surface hydrophilicity.
Ukutshintsha kweqondo lokushisa akuchaphazeli nje ukukhululeka kwesibini sokutywinwa kunye nobukhulu bamacandelo, kodwa kunobudlelwane obungenakulinganiswa kunye ne-viscosity yegesi. I-viscosity yegesi iyanda okanye iyancipha ngokunyuka okanye ukuhla kweqondo lokushisa.
Ngoko ke, ukuze kuncitshiswe impembelelo yobushushu ekusebenzeni kokutywinwa kwevalve, kufuneka siyile isibini sokutywina sibe sisitulo esiguquguqukayo kunye nezinye iivalve ezinembuyekezo yobushushu.
4. Umgangatho wesibini sokutywina
Umgangatho wokutywina ubhekiselele ekukhethweni kwezinto, ukuhambelana, ukuchaneka kokuvelisa kwitshekhi. Ngokomzekelo, i-disc ihambelana kakuhle nobuso bokutywinwa kwesihlalo ukuphucula ukuqina. Uphawu lwe-ring corrugations ngakumbi kukuba ukusebenza kwayo kwe-labyrinth yokutywinwa kulungile.