Ukuqhathaniswa Kokusebenza kwe-DBB kanye ne-DIB trunnion I-valve yebhola ekhweziwe

Ibhola le-trunnion mounted bal valve lilungisiwe futhi isihlalo sevalvu siyantanta. Isihlalo se-valve singahlukaniswa sibe yi-single piston effect (SPE) noma isenzo sokuzikhulula,

kanye nomphumela we-piston kabili, (i-DPE.) Isihlalo sevalvu yephiston eyodwa singavalwa ohlangothini olulodwa kuphela. Isihlalo se-valve ye-piston singafinyelela ukuvala kuzo zombili izinkomba.

Uma sisebenzisa uphawu → │ lwepiston ye-SPE kanye nophawu → │← lwe-DPE, izinhlobo ezine zamavalvu ezibalwe ngenhla zingabonakala kusetshenziswa Izibalo 1-4

I-Fig 1 DBB (SPE-SPE)

I-Fig.2 DIB (DPE+DPE)

I-Fig.3 DIB-1 (SPE+DPE)

Fig4. I-DIB-2 (DPE+SPE)

Emfanekisweni 1, lapho uketshezi lugeleza lusuka kwesobunxele luye kwesokudla, isihlalo sevalvu ekhuphuka nomfudlana (SPE) sidlala indima yokuvala, futhi ngaphansi komphumela wengcindezi yoketshezi,

isihlalo se-valve ekhuphuka nomfula sinamathela ebholeni ukuze sifinyelele ukuvaleka. Ngalesi sikhathi, isihlalo se-valve esezansi nomfula asidlali indima yokuvala.

Lapho inani elikhulu legesi elinomfutho ophezulu likhiqizwa ekamelweni le-valve futhi ukucindezela okukhiqizwayo kukhulu kunamandla asentwasahlobo esihlalo se-valve esingezansi,

isihlalo se-valve esingezansi sizovuleka ukuze sifinyelele ukukhululeka kwengcindezi. Ngokuphambene nalokho, isihlalo se-valve esingezansi sisebenza njengomsebenzi wokuvala,

kuyilapho isihlalo se-valve ephezulu sisebenza njengomsebenzi wokusiza ukucindezela ngokweqile. Yilokhu esakubiza ngokuthi i-double block ne-Bleed valve.

Emfanekisweni wesi-2, lapho uketshezi lugeleza lusuka kwesobunxele luye kwesokudla, isihlalo sevalvu ephezulu (DEP) sizodlala indima yokuvala,

kuyilapho isihlalo se-valve esezansi nomfula singadlala indima yokuvala. Ezinhlelweni zokukhiqiza zangempela, isihlalo se-valve esingezansi sidlala indima yokuphepha ekabili.

Uma isihlalo sevalvu ephezulu sivuza, isihlalo sevalvu yaphansi sisengahlala sivaliwe. Ngokufanayo, lapho uketshezi lugeleza lusuka kwesobunxele luye kwesokudla,

isihlalo se-valve engezansi sidlala indima enkulu yokuvala, kuyilapho isihlalo se-valve esikhuphuka nomfula sidlala indima yokuphepha ekabili. Ububi buwukuthi lapho igesi ephezulu yokucindezela

ikhiqizwa egumbini le-valve, izihlalo zama-valve ezikhuphuka nomfula noma ezansi nomfula azikwazi ukufeza impumuzo, okungase kudinge ukusetshenziswa kwe-valve yokusiza ukuphepha.

exhunywe ngaphandle kwe-valve, ukuze ukucindezela okukhuphuka emgodini kungakhululwa ngaphandle, kodwa ngesikhathi esifanayo, kunezela iphuzu lokuvuza.

Emfanekisweni wesi-3, lapho uketshezi lugeleza lusuka kwesobunxele luye kwesokudla, isihlalo sevalvu esikhuphuka nomfula singadlala indima yokuvala, kanti nesihlalo se-valve esinezinhlangothi ezimbili esingezansi singakwazi ukudlala.

dlala indima yokuhlanganisa kabili. Ngale ndlela, ngisho noma isihlalo sevalvu ekhuphuka nomfula sonakalisiwe, isihlalo sevalvu engezansi sisengahlala sivaliwe. Lapho ingcindezi ngaphakathi

umgodi ukhuphuka ngokuzumayo, ingcindezi ingadedelwa ngesihlalo se-valve ekhuphuka nomfula, okungashiwo ukuthi kunomthelela ofanayo wokuvala njengezihlalo ezimbili ze-valve ze-DIB-1,

Nokho, ingafinyelela ukukhululeka kokucindezela okuzenzakalelayo ekugcineni kwesihlalo sevalvu ekhuphukayo, ihlanganise izinzuzo zawo womabili amavalvu e-DBB kanye ne-DIB-1.

Emfanekisweni wesi-4, ucishe ufane nowoMfanekiso 3. Umehluko kuphela ukuthi lapho umfutho wegumbi le-valve ukhuphuka, isiphetho sesihlalo se-valve esingezansi siyaqaphela.

ukukhululeka kwengcindezi okuzenzakalelayo. Ngokuvamile, ngokombono wobuchwepheshe, kunengqondo futhi kuphephe kakhudlwana ukukhulula ukucindezela okungavamile phakathi nendawo.

ekamelweni ukuya phezulu. Ngakho-ke, umklamo wangaphambili uzosetshenziswa, kuyilapho umklamo wokugcina ngokuyisisekelo ungenalo inani elisebenzayo, okuyinto engavamile kakhulu ekusebenzeni okungokoqobo.

Kufanele kugcizelelwe ukuthi ngokuvamile, isihlalo se-valve ephezulu sidlala indima enkulu yokuvala futhi sisetshenziswa njalo, okuholela emathubeni aphezulu okulimala.

Uma isihlalo sevalvu engezansi singadlala indima yokuvala ngalesi sikhathi, kuwukuqhubeka kwempilo yevalvu. Lesi futhi isizathu esenza ukuthi i-DIB-1 ne-DIB-2 (SPE+DEP)

ama-valve anesikhathi eside sokusebenza uma kuqhathaniswa namanye ama-valve.