Takulandilani ku Thomas Insights-tsiku lililonse, tidzatulutsa nkhani zaposachedwa komanso kusanthula kuti owerenga athu azidziwa zomwe zikuchitika m'makampani. Lowani apa kuti mutumize mitu yatsiku molunjika kubokosi lanu.
Nthunzi yopangidwa ndi ma boilers amadzi otentha imagwiritsidwa ntchito kwambiri m'mafakitale. Njira zamafakitale monga kuyanika, ntchito zamakina, kupanga magetsi ndi kutenthetsa njira ndizomwe zimagwiritsidwa ntchito ndi nthunzi. Valve ya nthunzi imagwiritsidwa ntchito pochepetsa kuthamanga kwa nthunzi yolowera ndikuwongolera bwino ndikuwongolera nthunzi ndi kutentha komwe kumaperekedwa kunjira izi.
Mosiyana ndi madzi ena ambiri opangira mafakitale, nthunzi imakhala ndi mawonekedwe ake, zomwe zimapangitsa kuti zikhale zovuta kuwongolera ndi ma valve. Makhalidwewa angakhale okwera kwambiri komanso kutentha kwake komanso mphamvu yake yochepetsetsa, yomwe imatha kuchepetsa mofulumira mawu oposa chikwi. Ngati mumagwiritsa ntchito valavu ngati chida chowongolera njira, pali malingaliro angapo mukamagwiritsa ntchito nthunzi.
Zotsatirazi ndi zolakwika 7 zowopsa kwambiri pakuyika ma valve zomwe simuyenera kupanga mukamagwiritsa ntchito nthunzi. Mndandandawu suphatikiza njira zonse zopewera kuwongolera ma valve. Imalongosola zochitika zomwe nthawi zambiri zimabweretsa kuwonongeka kapena kusatetezeka poyesa kuyendetsa nthunzi.
Aliyense amadziwa kuti nthunzi idzasungunuka, koma pokambirana za kayendetsedwe ka mapaipi a nthunzi, mbali yodziwika bwino ya nthunzi nthawi zambiri amaiwala. Anthu ambiri amaganiza kuti mzere wopanga nthawi zonse umakhala wotentha kwambiri komanso mpweya, ndipo valavu imapangidwira izi.
Komabe, mzere wa nthunzi sumayenda mosalekeza, motero umazizira komanso kukhazikika. Ndipo condensation imatsagana ndi kuchepa kwakukulu kwa voliyumu. Ngakhale misampha ya nthunzi imagwira bwino ntchito ya nthunzi yowuma, ma valve pa mzere wa nthunzi ayenera kupangidwa kuti azithira madzi amadzimadzi, omwe nthawi zambiri amakhala osakaniza amadzimadzi ndi gasi.
Pamene nthunzi ikakamiza madzi osasunthika kuti afulumire mwadzidzidzi ndipo atatsekedwa ndi ma valve kapena zopangira, nyundo yamadzi idzachitika mu mapaipi a nthunzi. Madzi amatha kuyenda mothamanga kwambiri, kuchititsa phokoso ndi kuyenda kwa chitoliro pakanthawi kochepa, kapena kuphulika kwamphamvu kwambiri, kuwononga mapaipi kapena zida. Pogwira ntchito ndi nthunzi, valavu paipi yopangira ndondomeko iyenera kutsegulidwa kapena kutsekedwa pang'onopang'ono kuti madzi asawonongeke mwadzidzidzi.
Mavavu opangira ntchito za nthunzi ayenera kugwira ntchito molingana ndi momwe amapangidwira komanso kutentha. Nthunziyo imakula mofulumira kufika pa voliyumu yaikulu. Kuwonjezeka kwa kutentha kwa 20 K kudzawonjezera kupanikizika kwa valve, zomwe sizingapangidwe kuti zikhale zovuta. Valavu iyenera kupangidwira zovuta kwambiri (kuthamanga kwakukulu ndi kutentha) mu dongosolo.
Kulakwitsa kofala pamatchulidwe a valve ndi kusankha ndi mtundu wolakwika wa vavu pakugwiritsa ntchito nthunzi. Mitundu yambiri ya valve ingagwiritsidwe ntchito popanga nthunzi. Komabe, amapereka ntchito zosiyanasiyana ndi maulamuliro. Mavavu a mpira kapena ma valve a zipata amapereka kuwongolera kolondola, komwe kumatheka kuposa ma valve agulugufe. Chifukwa cha kuthamanga kwakukulu, kusiyana kumeneku n'kofunika kwambiri pakugwiritsa ntchito nthunzi. Mitundu ina ya mavavu yomwe imapezeka pogwiritsira ntchito nthunzi ndi ma valve a zipata ndi ma diaphragm.
Cholakwika chofananacho pakusankha mtundu wa valve ndikusankha mtundu wa actuator. The actuator ntchito kutsegula ndi kutseka valavu patali. Ngakhale choyatsira / chozimitsa chikhoza kukhala chokwanira pamapulogalamu ena, ntchito zambiri za nthunzi zimafunikira kusintha makinawo kuti azitha kuwongolera bwino kuthamanga, kutentha, ndi voliyumu.
Musanasankhe valavu kuti mugwiritse ntchito nthunzi, tengani nthawi kuti muyerekeze kutsika kwapakati pa valve. Valavu ya 1.25-inch imatha kuchepetsa kuthamanga kwamtunda kuchokera ku 145 psi kufika ku 72.5 psi, pamene valavu ya 2-inch pamtsinje womwewo idzachepetsa kuthamanga kwa 145 psi kumtunda kwa 137.7 psi yokha.
Ngakhale kugwiritsa ntchito ma valve ang'onoang'ono ndikosavuta komanso kokopa, makamaka ngati kuli kokwanira, mwatsoka amakonda kumveka phokoso. Zimagwirizananso ndi kugwedezeka komwe kumachepetsa moyo wa mavavu ndi zida zapaipi. Ganizirani za valve yokulirapo kuposa yofunikira kuti muzitha kuyendetsa phokoso ndi kugwedezeka. Valve ya nthunzi imakhalanso ndi chipangizo chapadera chochepetsera phokoso.
Cholakwika china pakukulitsa ma valve ndikuchepetsa kwa gawo limodzi. Zimapangitsa kuthamanga kwa nthunzi kumtunda kwa valavu kuvala pamwamba pa njira yotchedwa kukokoloka. Ngati mphamvu ya nthunzi yoperekedwa ndi maoda angapo okwera kuposa momwe amafunira, chonde lingalirani zochepetsera kupanikizika mu magawo awiri kapena kupitilira apo.
Mfundo yomaliza ya kukula kwa vavu ndizovuta kwambiri. Apa ndi pamene kuwonjezeka kwina kwa kuthamanga kwamtunda sikudzawonjezera kutuluka kwa nthunzi kupyolera mu valve. Zimasonyeza kuti valavu ndi yaying'ono kwambiri kuti isagwiritsidwe ntchito. Kumbukirani kuti kukula kwa valve sikuyenera kukhala kwakukulu kwambiri kuti musapewe "kugwedeza", zomwe zingachitike pamene kusintha pang'ono pa malo a valve kumayambitsa kusintha kwakukulu mu ntchito yolamulira, makamaka pansi pa katundu wochepa.
Mapangidwe a ma valve a nthunzi ndi njira zawo zingakhale zovuta. Zofunikira pakuwongolera kusiyana kwa kuchuluka kwa madzi ndi nthunzi, condensation, nyundo yamadzi, ndi phokoso zitha kusokoneza. Anthu ambiri amalakwitsa izi popanga nthunzi, makamaka poyesa koyamba. Ndipotu, kulakwitsa ndi mbali yachibadwa ya kuphunzira. Kudziwa zambiri kungakuthandizeni kupewa zolakwika zomwe zingakupangitseni kuchulukirachulukira komanso kutsika kwa nthawi yogwiritsira ntchito nthunzi.
Copyright © 2021 Thomas Publishing Company. maumwini onse ndi otetezedwa. Chonde onani zomwe zikuyenera kuchitika, zinsinsi ndi chidziwitso chaku California chosatsata. Tsambali lidasinthidwa komaliza pa Okutobala 8, 2021. Thomas Register® ndi Thomas Regional® ndi gawo la Thomasnet.com. Thomasnet ndi chizindikiro cholembetsedwa cha Thomas Publishing Company.
Nthawi yotumiza: Oct-08-2021
