Vavu yoyang'anira panjira yayikulu yoperekera madzi
| Mtundu | Valve yowongolera |
| Chitsanzo | T668Y-4500LB, T668Y-500, T668Y-630 |
| Nominal Diameter | DN 300-400 |
Imagwiritsidwa ntchito ngati chitoliro chachikulu choperekera madzi cha 1,000MW supercritical (ultra-supercritical) unit boiler powongolera kutuluka kwa madzi.
- Valavu ndi mawonekedwe amtundu wowongoka, njira yotuluka pakatikati ndi mtundu wotuluka ndipo kusindikiza pamwamba pampando wa valve kuli kutali kwambiri ndi gawo lomaliza la evaporation zone kuti zitsimikizire moyo wautumiki.
- Thupi la vavu ndi boneti zimatengera kapangidwe kachitsulo kolimba kolimba kwambiri kuti kakwaniritse zofunikira zamphamvu pansi pa kutentha kwambiri komanso kupanikizika.
- Imatengera kapangidwe ka mpando wa valavu wochotseka ndipo mpando wa valavu uli ndi Stellite No. 6 alloy build-up welding pamtunda wake wosindikiza.
- The vavu chimbale utenga dongosolo bwino ndi kusindikiza pamwamba amakumana mkulu pafupipafupi quenching; Kumtunda ndi kumunsi kwa minyewa ya valve disc imazindikira kuthamanga kwapakati kudzera pa pore yolumikizira. Pachifukwa ichi, valavu ikhoza kutsekedwa ndi chipangizo choyendetsa galimoto chochepa kwambiri.
- Chigawo cha Throttle chapakati pa valve chidapangidwa kuti chitengere chivundikiro cha 6-wosanjikiza 5-masitepe ochepetsa kupanikizika kuti mumwaze madzi amtundu umodzi wokhala ndi mphamvu zambiri mumadzimadzi amitundu yambiri ndi mphamvu zochepa kuti muchepetse liwiro ndi phokoso. Kuchepetsa kwapang'onopang'ono kwapang'onopang'ono kumazindikirika ndi kusuntha kwa kabowo kuti athetse cavitation. Khomo lomaliza limapangitsa kuti madzi azichoka motsatira mzere wa tangent ndikuyang'ana mkati mwa valavu kuti achepetse kukwapula kwa ma valve.
- Chisindikizo chapakati cha flange chimatengera mawonekedwe osindikizira awiri a gasket yopangidwa ndi dzino komanso mphete yosungira mphamvu, kupangitsa kusindikiza kukhala kodalirika.
- Pansi pakugwira ntchito kwakuyenda pang'ono komanso kupanikizika kwakukulu, kutsika kwa manja kwa masitepe angapo kumatengedwa ndikuchepetsa kupanikizika pang'onopang'ono kumazindikirika ndi kusuntha kwa kabowo kokhala ndi mainchesi osafanana kuti azitha kuwongolera kuthamanga kwapakati mosamalitsa ndikuchepetsa mphamvu ya cavitation ndi kung'anima evaporation pa valavu. Pansi pakugwira ntchito kwakuyenda kwakukulu ndi kupanikizika kochepa kosiyana, zenera la sitepe imodzi limatengedwa kuti lichepetse kupanikizika kuti zitsimikizire kuthamanga kwa valve.
- Makhalidwe oyendetsera bwino amapangidwa bwino, amatha kuwongolera kuyenda kwapakati molondola kuti akwaniritse bwino malamulo.
- Valavu imatha kukhala ndi makina opangira magetsi kapena pneumatic kuti mutsegule ndikutseka mwachangu komanso chitetezo katatu.
