Ma valve a Globeakhala akuthandizira pakuwongolera madzimadzi kwa zaka 200 ndipo tsopano akupezeka paliponse. Komabe, muzinthu zina, mapangidwe a valve padziko lonse amatha kugwiritsidwanso ntchito kuyang'anira kuzimitsa kwathunthu kwamadzimadzi. Ma valve a globe amagwiritsidwa ntchito kuwongolera kutuluka kwamadzi. Mavavu a Globe akuyatsa/kuzimitsa ndikugwiritsa ntchito modulitsa amatha kuwoneka kunja kwa nyumba ndi mabizinesi, pomwe mavavu amayikidwa pafupipafupi.

Mpweya ndi madzi zinali zofunika kwambiri pa Kusintha kwa Mafakitale, koma zinthu zomwe zinali zoopsazi zinafunika kuziletsa. Thevalavu ya globendiye valavu yoyamba yofunikira kuti amalize ntchitoyi moyenera. Mapangidwe a valve yapadziko lonse anali opambana komanso okondedwa kwambiri moti adapangitsa kuti ambiri opanga ma valve (Crane, Powell, Lunkenheimer, Chapman, ndi Jenkins) alandire mavoti awo oyambirira.

Ma valve a zipataAmapangidwa kuti azigwiritsidwa ntchito pamalo otseguka kapena otsekedwa kwathunthu, pomwe ma valve a globe amatha kugwiritsidwa ntchito ngati ma block kapena ma valve odzipatula koma amapangidwa kuti azikhala otseguka pang'ono kuti azitha kuyendetsa bwino. Chisamaliro chiyenera kugwiritsidwa ntchito popanga zisankho pogwiritsira ntchito ma valve a globe pa ma valve odzipatula komanso otsekedwa, chifukwa zimakhala zovuta kusunga chisindikizo cholimba ndi kukankhira kwakukulu pa disc. Mphamvu yamadzimadzi idzathandiza kukwaniritsa chisindikizo chabwino ndikupangitsa kuti ikhale yosavuta kusindikiza pamene madzi akuyenda kuchokera pamwamba mpaka pansi.

Ma valve a Globe ndiabwino pakugwiritsa ntchito ma valve owongolera chifukwa cha ntchito yake yowongolera, yomwe imalola kuwongolera kwabwino kwambiri ndi ma positioners ndi ma actuators olumikizidwa ndi boneti ya valavu yapadziko lonse lapansi ndi tsinde. Amachita bwino pamapulogalamu angapo owongolera madzimadzi ndipo amatchedwa "Final Control Elements."

njira yosalunjika

Globe imadziwikanso kuti valavu yapadziko lonse chifukwa cha mawonekedwe ake ozungulira, omwe amabisabe chikhalidwe chachilendo komanso chosokonekera cha njirayo. Ndi mayendedwe ake apamwamba ndi apansi opindika, valavu yotseguka yapadziko lonse lapansi imawonetsabe kugundana kwakukulu kapena chotchinga chakuyenda kwamadzimadzi mosiyana ndi chipata chotseguka kapena valavu ya mpira. Kukangana kwamadzi komwe kumachitika chifukwa chopendekeka kumayenda pang'onopang'ono kudzera mu valve.

Mayendedwe a coefficient, kapena "Cv," a valve amagwiritsidwa ntchito kuwerengera momwe amayendera. Ma valve olowera pachipata amakhala ndi kukana kocheperako kwambiri akakhala pamalo otseguka, chifukwa chake Cv idzakhala yosiyana kwambiri ndi valavu yachipata ndi valavu yapadziko lonse lapansi yofanana.

Disiki kapena pulagi, yomwe imakhala ngati njira yotseka valavu yapadziko lonse lapansi, imatha kupangidwa mosiyanasiyana. Kuthamanga kwa valavu kungasinthe kwambiri malinga ndi chiwerengero cha tsinde cha spins pamene valavu imatsegulidwa mwa kusintha mawonekedwe a disc. Zomwe zimapangidwira kapena "zachikhalidwe" zokhotakhota zimagwiritsidwa ntchito m'mapulogalamu ambiri chifukwa ndizoyenera kwambiri kusiyana ndi mapangidwe ena a kayendetsedwe kake (kuzungulira) kwa tsinde la valve. Ma disks a V-port ndi oyenerera makulidwe onse a ma valve padziko lonse lapansi ndipo amapangidwa kuti aziletsa kuyenda bwino pamagawo osiyanasiyana otsegulira. Kuwongolera koyenda kwathunthu ndi cholinga cha mitundu ya singano, komabe nthawi zambiri amangoperekedwa m'madiameter ang'onoang'ono. Choyika chofewa, chokhazikika chikhoza kuikidwa mu disc kapena mpando pamene kutsekedwa kwathunthu kukufunika.

Kukonzekera kwa valve ya Globe

Kutsekedwa kwenikweni kwa chigawo-ku-gawo mu valve ya globe kumaperekedwa ndi spool. Mpando, disc, tsinde, backseat, ndipo nthawi zina zida zomwe zimamangiriza tsinde ku diski zimapanga valavu yapadziko lonse lapansi. Kuchita bwino kwa mavavu aliwonse ndi moyo wake wonse kumadalira kapangidwe kake ndi kusankha kwazinthu, koma mavavu a globe amakhala pachiwopsezo kwambiri chifukwa chakukangana kwawo kwamadzimadzi komanso njira zovuta kuyenda. Kuthamanga kwawo ndi chipwirikiti zimakwera pamene mpando ndi disc zikuyandikirana. Chifukwa cha chiwonongeko chamadzimadzi ndi kuchuluka kwa liwiro, ndizotheka kuwononga valavu ya valve, yomwe idzawonjezera kwambiri kutuluka kwa valve ikatsekedwa. Zingwe ndi mawu oti cholakwika chomwe nthawi zina chimawoneka ngati ma flakes ang'onoang'ono pampando kapena disc. Chimene chinayamba ngati njira yothirira pang'ono chikhoza kukula ndikusintha kukhala chiwopsezo chachikulu ngati sichikonzedwa munthawi yake.

Pulagi ya valve pamavavu ang'onoang'ono amkuwa amapangidwa ndi zinthu zomwezo monga thupi, kapena nthawi zina aloyi yolimba ngati yamkuwa. Zomwe zimagwiritsidwa ntchito kwambiri pazitsulo zopangira ma valves achitsulo ndi bronze. IBBM, kapena "Iron Body, Bronze Mounting," ndi dzina lachitsulo ichi. Pali zida zambiri zochepetsera zomwe zimapezeka pamavavu achitsulo, koma nthawi zambiri chinthu chimodzi kapena zingapo zochepetsera zimapangidwa ndi zitsulo zosapanga dzimbiri 400. Kuphatikiza apo, zida zolimba monga stellite, zitsulo zosapanga dzimbiri 300, ndi ma aloyi amkuwa ngati Monel amagwiritsidwa ntchito.

Pali mitundu itatu yofunikira ya ma valve padziko lonse lapansi. Mawonekedwe a "T", omwe ali ndi tsinde perpendicular kumayendedwe a chitoliro, ndiwofala kwambiri.
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Mofanana ndi T-valve, valavu ya ngodya imasinthasintha kutuluka mkati mwa valavu 90 madigiri, ikugwira ntchito ngati chipangizo chowongolera kuthamanga ndi chigongono cha chitoliro cha 90. Pa mafuta ndi gasi "mitengo ya Khrisimasi," ma valve a globe ndi mtundu wa ma valve omaliza owongolera omwe amagwiritsidwabe ntchito nthawi zambiri pamwamba pa ma boilers.
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Mapangidwe a "Y", omwe ndi mawonekedwe achitatu, amapangidwa kuti akhwimitse mapangidwe a ntchito pa / off pomwe amachepetsa kuyenda kwa chipwirikiti komwe kumachitika mu globe valve body. Bonnet, tsinde, ndi diski ya mtundu uwu wa vavu ya globe imakhomedwa pa ngodya ya 30-45 madigiri kuti njira yothamanga ikhale yowongoka komanso kuchepetsa kukangana kwamadzimadzi. Chifukwa cha kukangana kwachepa, valavuyo sichitha kuwononga kwambiri ndipo mawonekedwe ake onse amayendetsedwa bwino.