Ivalve elawulayo yonikezelo lwamanzi oluphambili
| Uhlobo | Ivalve yokulawula |
| Umzekelo | T668Y-4500LB, T668Y-500, T668Y-630 |
| Idayamitha yeNominal | DN 300-400 |
Isetyenziselwa unikezelo lwamanzi umbhobho odlulayo we-1,000MW supercritical (ultra-supercritical) yeyunithi yebhoyila yokulawula ukuhamba kwamanzi.
- Ivalve iyisakhiwo sohlobo oluthe tye, ulwalathiso lokuqukuqela oluphakathi luhlobo lokuqukuqela kunye nokutywinwa komphezulu wesitulo sevalve ukude nenyathelo lokugqibela lokuphuphuma kokukhanya kwindawo yokuqinisekisa ubomi benkonzo.
- Umzimba wevalve kunye nebhonethi zamkela ubume bentsimbi obunjiweyo obunamandla aphezulu ukuhlangabezana ngcono neemfuno zamandla phantsi kobushushu obuphezulu kunye noxinzelelo.
- Yamkela isakhiwo sesihlalo sevalve esisuswayo kwaye isihlalo sevalve sine-Stellite No. 6 yealloy build-up welding kumphezulu wokutywina.
- I-disc ye-valve ithatha isakhiwo esilungeleleneyo kunye nokutywinwa kwendawo ehamba phambili yokucima ukucima; imingxunya ephezulu nasezantsi yediski yevalve ibona ibhalansi yoxinzelelo ngepore edibanisayo. Kule meko, i-valve inokuvalwa ngesixhobo sokuqhuba kunye ne-thrust encinci.
- Inxalenye ye-Throttle ye-valve core yenzelwe ukwamkela i-6-layer cover 5-step pressure yokunciphisa isakhiwo ukuze usasaze ulwelo olulodwa lwe-strand kunye namandla aphezulu kwi-multi-strand fluid kunye namandla aphantsi ukunciphisa isantya kunye nengxolo. Inyathelo ngenyathelo lokunciphisa uxinzelelo lwenziwa ngokuchithwa kwe-aperture ukuphelisa i-cavitation. Umkhono wenyathelo lokugqibela wenza ukuba ulwelo luhambe luhamba ecaleni komgca we-tangent kunye nokujongana nomngxuma ongaphakathi womzimba wevalvu ngokungathanga ngqo ukunciphisa ukukhuhlwa kumzimba wevalvu.
- Ukutywinwa kwe-flange ephakathi kusebenzisa ubume bokutywinwa kabini kwegasket yamazinyo ehlanganisiweyo kunye nomsesane wokugcina amandla olastiki, okwenza ukutywina kuthembeke ngakumbi.
- Phantsi kwemeko yokusebenza yokuqukuqela okuncinci kunye noxinzelelo olukhulu olwahlukileyo, i-throttle ye-sleeve yamanyathelo amaninzi yamkelwa kwaye ukucutha uxinzelelo lwenyathelo ngenyathelo lwenziwa ngolungiselelo lokuchithwa kwe-aperture enedayamitha engalinganiyo ukulawula isantya sokuhamba okuphakathi ngokungqongqo kunye nokunciphisa impembelelo i-cavitation kunye ne-flash evaporation kwi-valve. Ngaphantsi kwemeko yokusebenza yokuhamba okukhulu kunye noxinzelelo oluncinci oluhlukeneyo, iwindow yesinyathelo esisodwa yamkelwa ukunciphisa uxinzelelo ukuze kuqinisekiswe umthamo wokuhamba kwevalve.
- Iimpawu zokulawula ziphuculwe ipesenti ezilinganayo, ezikwazi ukulawula ukuhamba okuphakathi ngokuchanekileyo ukufezekisa ukusebenza kakuhle kommiselo.
- Ivalve inokuxhotyiswa ngombane ozikhethelayo okanye umatshini womoya ukuze uqonde ukuvulwa nokuvala ngokukhawuleza kunye nokhuseleko oluthathu.
