Sesepa sa ho hlahloba se thibela ho khutla ho ka bang kotsi ho sireletsa lisebelisoa tse kang lipompo le li-compressor. Li-valve tse sa khutleng li lumella ho phalla ha mokelikeli ka tsela e le 'ngoe feela le ho thibela ho phalla ho khutlela morao. Li-valve tsa mofuta ona li fumaneha ka 'mele oa cast le oa maiketsetso (BS 1868, API 6D, API 602) le ka meralo e mengata e kang meralo ea swing, bolo, lift, stop le piston.
Ka bokhutšoanyane, valve ea ho hlahloba ke sesebelisoa sa tšireletso se thibelang mokelikeli ho phalla ka tsela e sa batleheng ka har'a tsamaiso ea liphaephe kapa liphaephe (kaha li-backflows li ka senya thepa e holimo).
Cheke valve e sebetsa joang?
Valve e lumella mokelikeli ho phalla ka tsela e lakatsehang feela (haeba ho na le khatello e lekaneng), 'me e thibela ho phalla leha e le efe ka lehlakoreng le leng. Hape, valve e koala ka boeona ha khatello e theoha. Ka hona ho bohlokoa hore valve e kenngoe ka mokhoa o nepahetseng!
Hlokomela hore mofuta ona oa valve o phethahatsa boholo ba oona ntle le matla a ka ntle kapa ts'ebetso. Ena ke phapang ea bohlokoa khahlanong le heke kapa li-valve tsa globe, tse hlokang matla a kantle ho sebetsa (boemo, lebili, gear kapa actuator).
Lintlha tse ka sehloohong tse kenyelletsang mofuta ona oa valve ke:
BS 1868: Mofuta o tloaelehileng, ka tšepe ea carbon le alloy.
API 6D: bakeng sa lipeipi.
API 602 / BS 5351: tšepe e entsoeng ka tšepe (swing, bolo, piston).
API 603: mofuta oa ho emisa tšepe e sa hloekang.
ASME B16.34 (khatello le litekanyetso tsa mocheso).
ASME B16.5/ASME B16.47 (likhokahanyo tsa pheletso tse flanged).
ASME B16.25 (mahokelo a butt weld).
Li-valve tsa tšepe tsa Cast li fumaneha ka lipheletso tse nang le flanged le butt weld.
Li-valve tse entsoeng, tse nyenyane, li fumaneha ka likhokahano tse nang le khoele le socket weld.
Li-valve tsena li emeloa ke letšoao le latelang ho liphaepheng tsa P&ID: Letšoao la valve ea ho hlahloba setšoantšong sa P&ID.
Li-valve tsa ho hlahloba li fumaneha ka mefuta e fapaneng e phethang mosebetsi o hlalositsoeng ka holimo ka meralo e fapaneng ea disc (bolo, clapet, piston, joalo-joalo). Ha re shebeng mofuta o mong le o mong ka hloko.
TS'ELISO SHEBA VALE
Mofuta ona o na le moralo o bonolo ka ho fetisisa 'me o sebetsa ka diski ea tšepe ("Clapet") e khomaretsoeng ho hinge holimo. Ha mokelikeli o feta ka valve ea swing, valve e bulehile. Ha phallo e khutlelang morao e etsahala, liphetoho tsa ho sisinyeha hammoho le matla a khoheli li thusa ho theola disc, ho koala valve le ho thibela ho khutlela morao.
Li-valve tsa swing li sebelisetsoa ho tima mollo le ho thibela likhohola mekhoeng ea likhoerekhoere. Li boetse li etselitsoe ho sebetsa ka lisebelisoa tse kang khase, maro, le mefuta e meng ea mecha ea litaba.
Stop-check e ka qala, ea emisa, 'me ea laola phallo ea metsi ha e ntse e thibela ho khutla ho kotsi ho ka senyang lisebelisoa tse ling joalo ka lipompo le li-compressor.
Ha khatello ea tsamaiso e le ka tlase ho boleng bo itseng, valve ena e koala ka mokhoa o ikemetseng ho thibela ho phalla ha morao. Ka kakaretso, mofuta ona oa valve o na le taolo ea ka ntle ea ho thibela metsi ho koala tsela ea mokelikeli ka letsoho (e tšoanang le valve ea heke).
Li-valve tsa li-Stop-check li atile haholo lifemeng tsa motlakase, lits'ebetsong tsa boiler, le tlhoekiso ea oli le khase, ts'ebetso ea hydrocarbon, le lits'ebeletso tsa ts'ireletso tse phahameng haholo.
POLOKO HLALELE
Valofo ea ho hlahloba bolo e na le bolo e chitja e lutseng ka har'a 'mele e bulang le ho koala tsela ea mokelikeli ka tsela e batlang feela.
Bolo e potoloha ka bolokolohi ha mokelikeli o feta phaepheng ho leba moo o batlang. Haeba phaephe e fokotseha kapa e phalla ka morao, bolo e ka hare ho valve e ea setulong, e koala phasejeng. Moqapi ona o lumellana le maro a viscous.
Li-valve tsohle tsa ho hlahloba ke tsa lelapa la "li-valve tsa phahamisa", 'me e be le moralo oa setulo o ts'oanang le li-valve tsa globe.
Mofuta o mong oa moralo oa bolo ke seo ho thoeng ke mofuta oa piston. Mofuta ona oa valve o sebelisetsoa litšebeletso tse phahameng tsa khatello moo mokelikeli o ka fetolang tataiso hang-hang le ka matla a matle (sena ka lebaka la hore disc e tataisoa hantle 'me e lumellana hantle le setulo).
Li-valve tsa ho hlahloba li-ball le piston li ka kenngoa ka bobeli ka holimo le ka holimo.
RATI MABAKA
Li-valve tsa ho hlahloba lipoleiti tse peli, tse koahetsoeng ke tlhaloso ea API 594, hangata li sebelisoa ho sireletsa lipompo, li-compressor le lisebelisoa tse ling tsa mochine.
KHATELLO TIISO
Mofuta ona o na le sekoahelo se khethehileng sa moralo se khonang ho mamella likhatello tse phahameng.
Ho tla kenngoa valve e ncha ea ho hlahloba neng kapa neng ha ho kenngoa pompo e ncha ea sump. Sena se bakoa ke taba ea hore li-valve tsa khale tsa tšireletso li ka 'na tsa senngoa ke ts'ebetso e fetileng e bulehileng / e koaletsoeng kapa ka ho senya le likotsi tsa ho senya pompo e ncha ea sump li feta hole litšenyehelo tsa valve e ncha ea ho hlahloba!
Sesepa sa pompo sa sump se thibela ho khutlela morao ka har'a pompo ea sump ha sesebelisoa se tingoa ke opareitara kapa sistimi e ikemetseng ea taolo. Ntle le valve ea ho hlahloba, mokelikeli o ka khutlela ka har'a pompo ea sump 'me oa e qobella ho tsamaisa mokelikeli o tšoanang ka makhetlo a mangata, ebe o o chesa pele ho nako.
Ka hona, ho atolosa potoloho ea bophelo ba pompo ea sump, valve e sa khutleng e lokela ho kenngoa kamehla.
Nako ea poso: Oct-26-2019