Amanqaku aphambili okukhethwa kwevalvu ashwankathelwa

Amanqaku aphambili okukhethwa kwevalvu ashwankathelwa

Uninzi lwamajelo eendaba kwizixhobo zokuvelisa iikhemikhali zineempawu ezinobuthi obuphezulu, obunokutsha, obuqhumayo kunye nokubola. Iimeko zokusebenza zinzima kwaye zinzima, kwaye ubushushu bokusebenza kunye noxinzelelo luphezulu. Nje ukuba ivalve ingaphumeleli, ukukhanya kuya kukhokelela ekuvuzeni okuphakathi, okunzima kuya kukhokelela ekuvalweni kwesixhobo, kwaye kubangele neengozi ezimbi. Ngoko ke, ukhetho lwenzululwazi kunye nolunengqiqo lwe-valve alukwazi ukunciphisa kuphela iindleko zokwakhiwa kwesixhobo, kodwa nokuqinisekisa ukusebenza okukhuselekileyo kwemveliso. Makhe sithethe ngayoukhetho lwevalvu!
Uninzi lwamajelo eendaba kwizixhobo zokuvelisa imichiza zineempawu ezinobuthi obuphezulu, obunokutsha, obuqhumayo kunye nokubola. Iimeko zokusebenza zinzima kwaye zinzima, kwaye ubushushu bokusebenza kunye noxinzelelo luphezulu. Nje ukuba ivalve ingaphumeleli, ukukhanya kuya kukhokelela ekuvuzeni okuphakathi, okunzima kuya kukhokelela ekuvalweni kwesixhobo, kwaye kubangele neengozi ezimbi. Ngoko ke, ukhetho lwenzululwazi kunye nolunengqiqo lwe-valve alukwazi ukunciphisa kuphela iindleko zokwakhiwa kwesixhobo, kodwa nokuqinisekisa ukusebenza okukhuselekileyo kwemveliso. Masithethe ngokhetho lwevalvu!
Amanqaku aphambili okukhetha ivalve
1 Ivalve ecacileyo kwisixhobo okanye ekusebenziseni isixhobo
Misela iimeko zokusebenza zevalve: ubume bendawo esebenzayo, uxinzelelo lokusebenza, ukushisa okusebenzayo kunye nemodi yokulawula ukusebenza.
Khetha uhlobo oluchanekileyo lwevalve
Ukhetho oluchanekileyo lohlobo lwevalvu lusekwe kumyili wayo yonke inkqubo yokuvelisa, ukuqondwa ngokupheleleyo kweemeko zokusebenza njengento efunekayo, ekukhetheni uhlobo lwevalvu, umyili kufuneka alawule iimpawu zesakhiwo kunye nokusebenza kwevalve nganye.
Ukugqiba ukudibanisa kwevalve
Kuqhagamshelo oludityanisiweyo, uqhagamshelo lwe-flange, uqhagamshelo lwesiphelo se-welding, iintlobo ezimbini zokuqala eziqhelekileyo. Iivalvu ezinemisonto ubukhulu becala ziivalvu ezinedayamitha esezantsi kwe-50mm. Ukuba ubukhulu bobukhulu bukhulu kakhulu, ukufakela kunye nokutywinwa koqhagamshelwano kunzima kakhulu.
Iivalve eziphothiweyo zikulungele ukufakela kunye nokususa, kodwa zikhulu kwaye zibiza kakhulu kuneevalve ezinemisonto, ngoko ke zilungele ukudityaniswa kwemibhobho yobukhulu obahlukeneyo kunye noxinzelelo.
Uxhumo oludibeneyo lunokwethenjelwa ngakumbi kunoxhumo lwe-flanged, olufanelekileyo kwiimeko zokulayisha. Kodwa i-valve edibeneyo i-disassembly kunye nokufakwa kwakhona kunzima kakhulu, ngoko ke ukusetyenziswa kwayo ngokuqhelekileyo kusebenza ixesha elide elithembekileyo, okanye ukusetyenziswa kweemeko zokulayisha, iimeko zokushisa eziphezulu.
4. Ukukhethwa kwezinto zevalvu
Ukukhethwa kweqokobhe levalvu, amalungu angaphakathi kunye nemathiriyeli yokutywina yangaphezulu, ukongeza ekuthatheni ingqalelo iimpawu ezibonakalayo zesixhobo sokusebenza (ubushushu, uxinzelelo) kunye neempawu zekhemikhali (umhlwa), kufuneka zilawule iqondo lococeko lwemidiya (kunye okanye ngaphandle kwamasuntswana aqinileyo. ), ukongeza, kodwa ubhekiselele kwizibonelelo ezifanelekileyo zikarhulumente kunye nokusetyenziswa kwamasebe.
Ukhetho oluchanekileyo nolufanelekileyo lwezixhobo zevalve lunokufumana ubomi benkonzo yezoqoqosho obungcono kunye nokusebenza okungcono kwevalve. Umyalelo wokukhetha izinto eziphathekayo ze-Valve: intsimbi yentsimbi - i-carbon steel - insimbi engenasici, i-ring yokutywina umyalelo wokukhetha izinto eziphathekayo: i-rubber - ubhedu - i-alloy steel -F4.
Ezinye ezintlanu
KONGEZELELWEYO, UMLINGANISO WOKUHAMBA KUNYE NOXINEZELO LOXINCILELO LOKHUPHUKO OLUTHOVAYO NGEVAVU KUFANELE KUQINISWE, KUNYE NEvalve efanelekileyo kufuneka ikhethwe kusetyenziswa ulwazi olukhoyo (umzekelo, ikhathalogu yemveliso yevalvu, isampulu yemveliso yevalvu, njl. njl.).
Inkcazo yokukhethwa kohlobo lwevalve eqhelekileyo
Ukucaciswa kokukhethwa kohlobo lwevalve yesango
Ngokubanzi, kuqala kufuneka kunikwe iivalve zesango. Ivalve yesango ukongeza ilungele umphunga, i-oyile kunye neminye imithombo yeendaba, kodwa iyasebenza nakwi-granular solid and viscosity ye-medium, kwaye ifanelekile kwi-vent kunye ne-vacuum system valves. Kuphakathi kunye namasuntswana aqinileyo, umzimba wevalvu yesango uya kubonelelwa ngomngxuma omnye okanye emibini yokucoca. Kwiqondo eliphantsi lokushisa, kufuneka kukhethwe ivalve yesango lobushushu obuphantsi.
2. Inkcazo yokukhethwa kwevalve enqamlekileyo
Ivalve yeglowubhu ilungele iimfuno zokuxhathisa ulwelo azikho ngqongqo kumbhobho, oko kukuthi, ilahleko yoxinzelelo ayiqwalaselwa, kunye nobushushu obuphezulu, umbhobho ophakathi woxinzelelo oluphezulu okanye isixhobo, esilungele i-DN Ivalve encinci inokukhetha ivalve yeglowubhu, njengevalve yenaliti, ivalve yesixhobo, ivalve yesampulu, ivalve yokulinganisa uxinzelelo, njl.;
Ivalve yeglowubhu inolawulo lokuhamba okanye ukulawulwa koxinzelelo, kodwa ukuchaneka kohlengahlengiso aluphezulu, kwaye ububanzi bombhobho buncinci, kufanelekile ukukhetha ivalve yeglowubhu okanye ivalve ye-throttle;
Kwindawo enetyhefu kakhulu, kufanelekile ukukhetha ivalve yeglowubhu etywiniweyo; Kodwa ivalve yeglowubhu akufuneki isetyenziselwe i-medium ne-viscosity enkulu kunye ne-medium equkethe amasuntswana alula ukucotha, kwaye akufuneki isetyenziswe njengevalve yokuphuma kunye nevalve yenkqubo yokufunxa ephantsi.
3. Ukucaciswa kokukhethwa kwevalve yebhola
Ivalve yebhola ifanelekile kubushushu obuphantsi, uxinzelelo oluphezulu, i-viscosity medium. Uninzi lweevalvu zebhola zingasetyenziswa phakathi kunye namasuntswana aqinileyo amisiweyo, ngokweemfuno zezinto zokutywina zingasetyenziswa kwi-powder kunye ne-granular media;
I-valve yebhola ye-channel yonke ayifanelekanga ukulawulwa kokuhamba, kodwa ifanelekile ukuvulwa ngokukhawuleza kunye nezihlandlo zokuvala, kulula ukufezekisa ukunqunyulwa kwengxakeko; Ngokuqhelekileyo ekusebenzeni kokutywinwa okungqongqo, ukugqoka, ukutshatyalaliswa kwetshaneli, ukuvulwa ngokukhawuleza kunye nokuvala isenzo, ukunqanyulwa kwengcinezelo ephezulu (umahluko omkhulu woxinzelelo), ingxolo ephantsi, i-gasification phenomenon, i-torque encinci yokusebenza, ukuxhathisa ulwelo, ukusetyenziswa kweevalve zebhola kuyacetyiswa.
Ivalve yebhola ifanelekile kwisakhiwo sokukhanya, i-low pressure cut-off, i-corrosive media; Ivalve yebhola okanye iqondo lobushushu eliphantsi, i-cryogenic medium yevalve efanelekileyo, inkqubo yemibhobho yobushushu ephantsi kunye nesixhobo, kufuneka ikhethwe ngesigqubuthelo sobushushu esisezantsi sevalve;
Isixhobo sesihlalo sevalve yebhola edadayo kufuneka ithathe umthwalo webhola kunye nendawo yokusebenza, ivalve enkulu yebhola esebenzayo ifuna amandla amakhulu, DN≥
Ivalve yebhola eyi-200mm kufuneka ikhethe ifomu yokuhambisa izixhobo zeentshulube; Ivalve yebhola esisigxina ifanelekile kubukhulu obukhulu kunye nezihlandlo zoxinzelelo oluphezulu; Ukongeza, ivalve yebhola esetyenziselwa inkqubo yezinto ezinobuthi kakhulu, umbhobho weendaba ezinokutsha, kufuneka ube nomlilo, ulwakhiwo oluchasene ne-static.
4. Inkcazo yokukhethwa kwevalve ye-throttle
I-valve ye-Throttle ifanelekile kwiqondo eliphantsi lokushisa eliphantsi, amaxesha oxinzelelo oluphezulu, olufanelekileyo kwimfuno yokulungelelanisa ukuhamba kunye neengxenye zoxinzelelo, kungekhona i-viscosity kwaye iqulethe iinqununu eziqinileyo eziphakathi, akufanele zisetyenziswe njenge-valve block.
Inkcazo yokukhetha uhlobo lwevalve yeplagi
I-valve yeplagi ilungele ukuvulwa ngokukhawuleza kunye nezihlandlo zokuvala, ngokuqhelekileyo ayifanelekanga kwi-steam kunye neqondo lokushisa eliphakathi, kwiqondo lokushisa eliphantsi, i-viscosity medium, ifanelekile kwi-medium kunye namasuntswana amisiweyo.
Inkcazo yokukhetha uhlobo lwevalve yebhabhathane
Ivalve yebhabhathane ifanelekile kwidayamitha enkulu (efana ne-DN>600mm) kunye neemfuno zobude besakhiwo esifutshane, kunye nemfuno yolawulo lokuhamba kunye neemfuno zokuvula nokuvala ngokukhawuleza, ezisetyenziselwa ubushushu ≤
I-80 ℃, uxinzelelo ≤1.0MPa amanzi, ioli kunye nomoya oxinyiweyo kunye nezinye imidiya; Ngenxa yevalve yebhabhathane enxulumene nevalve yesango, ivalve yevalve yebhola ilahleko yoxinzelelo olukhulu kakhulu, ngoko ke ivalve yebhabhathane ifanelekile kwiimfuno zolahleko loxinzelelo ayingqongqo kwinkqubo yombhobho.
Inkcazo yokukhethwa kwevalve yokukhangela
Ivalve yokukhangela ifanelekile ngokubanzi kwimidiya ecocekileyo, akufanele isetyenziswe kwindawo equkethe amasuntswana aqinileyo kunye ne-viscosity enkulu. Xa ≤40mm, kuyacetyiswa ukuba usebenzise i-valve yokukhangela i-valve (* evunyelwe ukuba ifakwe kumbhobho othe tye); Xa i-DN = 50 ~ 400mm, kuyafaneleka ukusebenzisa i-valve yokukhangela i-swing yokunyusa i-valve (kumbhobho othe tye kunye nothe nkqo unokufakwa, njengokufakwa kumbhobho othe nkqo, ukuhamba okuphakathi ukusuka ezantsi ukuya phezulu);
Xa i-DN≥450mm, ivalve yokukhangela uhlobo lwe-buffer kufuneka isetyenziswe; Xa i-DN = 100 ~ 400mm inokukhetha kwakhona ivalve yokukhangela uhlobo lwe-clamp; Ivalve yokujonga i-Swing ingenziwa ngoxinzelelo oluphezulu kakhulu lokusebenza, i-PN inokufikelela kwi-42MPa, ngokweqokobhe kunye nezinto zokutywina zingasetyenziswa kuyo nayiphi na indawo yokusebenza kunye naluphi na uhlobo lobushushu obusebenzayo.
I-medium ngamanzi, umphunga, igesi, i-corrosive medium, i-oyile, amayeza, njl njl. Uluhlu lobushushu obusebenzayo lwe-medium buphakathi kwe-196 ℃ kunye ne-800℃.
Inkcazo yokukhethwa kwevalve ye-diaphragm
Ivalve ye-diaphragm ifanelekile kubushushu bokusebenza obungaphantsi kwe-200 ℃, uxinzelelo olungaphantsi kwe-oyile ye-1.0MPa, amanzi, i-asidi ephakathi kunye nephakathi equlethe izinto ezimisiweyo, azifanelekanga kwi-solvents ye-organic kunye ne-oxidant medium;
I-abrasive granular medium kufuneka ikhethe ivalve ye-weir diaphragm, khetha ivalve ye-weir diaphragm ukubhekisa kwitheyibhile yeempawu zayo; I-Viscous fluid, i-sement slurry kunye ne-precipitating medium kufuneka ikhethwe ngokuthe ngqo kwi-valve ye-diaphragm; Ngaphandle kokuba kuchazwe ngenye indlela, i-valve ye-diaphragm akufanele isetyenziswe kwimigca yokucoca kunye nezixhobo zokucoca.