Lub Rooj vag Valve yog dab tsi?
Lub rooj vag li qub, "riam" li qub, los yog lub qhov rooj sluice, yog cov khoom siv rau kev sib cais. Lawv ua li ntawd los ntawm kev qhib thiab kaw qhov ntws ntawm cov kua dej thiab lawv muaj cov tsos ntawm cov disc hauv cov dej ntws. Qee qhov tshwj xeeb li qub tuaj yeem thaiv qhov ntws ntawm cov pa thiab gasses.
Hauv cov kav dej, lub rooj vag li qub yog ib hom valve siv nrog rau lwm yam li qub. Feem ntau, nws tsis yog qhov zoo los siv lub rooj vag li qub los txwv lossis txo cov kua dej ntws tawm. Qhov no yog vim nws tsis yooj yim los ntsuas qhov ntws nrog qee qhov qhib li qub. Thaum siv li no, throttling kua ntws kuj tuaj yeem ua rau valve disc corrosion.
Qhov sib txawv ntawm cov rooj vag Valves
Lub rooj vag li qub poob rau hauv ntau pawg nyob ntawm seb leej twg koj nug. Nws yog qhov yooj yim tshaj los faib cov li qub rau hauv peb pawg:
-Txoj kev txav chaw
-Disc hom
- Bonnet sib koom hom
Stem Movement
Lub valve qia tuaj yeem sawv sab hauv lossis sab nraud ntawm lub valve. Cov no feem ntau hu ua "tsis nce valve qia" thiab "nce valve qia". Lub nce valve qia muaj qhov zoo ntawm kev pom - los ntawm kev txheeb xyuas txoj haujlwm ntawm lub valve qia, ib tus tuaj yeem pom tias lub rooj vag qhib lossis kaw.Cov qia tsis nce siab yog muab zais rau hauv lub valve. Txawm li cas los xij, nyob rau hauv cov xwm txheej uas qhov chaw muaj tsawg, lawv yuav muaj txiaj ntsig zoo, uas tuaj yeem ua rau lub qia nce mus sib tsoo nrog lwm cov tshuab.
Hom Disc
Muaj peb hom valve discs siv nyob rau hauv lub rooj vag li qub: hloov tau yooj yim wedges, cais wedges, thiab khoom wedges. Zoo li lub valve qia, txhua lub valve disc muaj ib qho kev siv tshwj xeeb.
Wedges tso cai rau kev siv ntau dua, uas yog vim li cas wedges feem ntau.
Cov khoom siv wedge zoo li cov khoom siv ntau tshaj plaws. Lawv yog cov yooj yim thiab ruaj khov. Txawm li cas los xij, lawv tsis tsim nyog rau kev nthuav dav thermal, uas txhais tau hais tias cov khoom siv yuav tsum tsis txhob siv rau hauv cov ntawv thov kub.
Flexible wedges yog tsim los tiv thaiv qhov tsis zoo ntawm cov kab nrib pleb. Txiav nyob ib ncig ntawm cov npoo kom tso cai rau thermal expansion, lawv feem ntau yog siv rau chav dej thiab ua rau muaj teeb meem ntawm cov kua dej vim cov kua dej no nyiam lo rau lub disc.
Thaum kawg, lub wedge yog tsim los ntawm ob halves nyob rau hauv nruab nrab. Haum rau ntau yam kub, kua, thiab cov roj uas tsis yog condensable, qhov sib xyaw ua ke feem ntau kim dua. Qee qhov tau nruab nrog cov springs sab hauv kom haum rau lub rooj zaum valve.
Bonnet Joint Hom
Peb yam cuam tshuam rau kev xaiv lub kaus mom sib koom ua ke - tus nqi, siab, thiab kev saib xyuas yooj yim.
Screwed bonnets yog pheej yig, thiab siv rau hauv daim ntawv thov yooj yim. Bolted bonnets yog nrov, ruaj, thiab yuav tsum tau ib tug gasket foob. Welded bonnets zoo ib yam li ruaj thiab nyiam qhov twg tsis xav tau.
Thaum kawg, lub siab-seal bonnets tswj qhov kub thiab txias zoo dua li lwm cov qauv tsim.
Qhov zoo ntawm Gate Valves
Lub rooj vag li qub yog qhov zoo tshaj plaws rau cov xwm txheej uas lawv yuav tsum tau qhib thiab kaw tsis tu ncua. Thaum nws nyuaj los qhia los ntawm qhov deb seb lawv puas qhib, lawv feem ntau txhim khu kev qha thiab pheej yig dua li pob li qub. Lub rooj vag valve muaj ntau yam zoo:
-Me ntsis dej tsis kam
- Ntau yam kev siv sib txawv
-Bidirectional ntws tswj
- Ua tau zoo thaum siv cov kua dej khov
Lub rooj vag li qub tso cov kav dej tsis muaj kev cuam tshuam, ua rau muaj kua dej tsawg. Thiab txij li lub rooj vag valve tuaj yeem tswj cov dej ntws los ntawm ob qho kev taw qhia, lawv muaj ntau yam thiab muaj ntau yam kev siv. Lawv tuaj yeem ua haujlwm raws li lub valve kaw, thiab yog qhov zoo tagnrho rau kev tswj cov slurries thiab cov kua dej qeeb qeeb. Cov roj hnyav, molasses, thiab lwm yam kua dej khov yog tag nrho cov piv txwv ntawm kev siv cov khoom tsim nyog.