Ma valve a Globe,ma valve pachipata, valavu butterfly, fufuzani ma valvendima valve a mpira, etc. Mavavuwa tsopano ndi zigawo zofunika kwambiri zowongolera pamapaipi osiyanasiyana.Vavu yamtundu uliwonse ndi yosiyana ndi mawonekedwe, kapangidwe kake komanso ngakhale magwiridwe antchito.Komabe, valavu yoyimitsa ndivalve pachipataali ndi mawonekedwe ofanana, ndipo onsewa ali ndi ntchito yodulira mapaipi.Choncho, abwenzi ambiri omwe samalumikizana kwambiri ndi valve adzasokoneza awiriwo.M'malo mwake, ngati muyang'ana mosamala, kusiyana pakati pa valavu yapadziko lonse lapansi ndivalve pachipatandi wamkulu ndithu.
1.Mwamapangidwe
Chisamaliro chiyenera kuperekedwa pakusankhidwa pamene malo oyika ali ochepa.Thevalve pachipataakhoza kutsekedwa mwamphamvu ndi kusindikiza pamwamba kutengera kupanikizika kwapakatikati, kuti akwaniritse zotsatira za kutayikira.Potsegula ndi kutseka, chigawo cha valve ndi malo osindikizira mpando wa valve nthawi zonse amalumikizana ndi kupakana wina ndi mzake, kotero kuti kusindikiza pamwamba kumakhala kosavuta kuvala.Pamene avalve pachipatayatsala pang'ono kutseka, kusiyana kwapakati pakati pa kutsogolo ndi kumbuyo kwa payipi kumakhala kwakukulu, zomwe zimapangitsa kuti malo osindikizira azikhala ovuta kwambiri.
Mapangidwe avalve pachipatazidzakhala zovuta kwambiri kuposa valve yotseka.Kuchokera pamawonekedwe, avalve pachipatandi wamtali kuposa valavu yotseka ndipo valavu yotseka ndi yayitali kuposa valavuvalve pachipatapa nkhani ya caliber yomweyo.Komanso, avalve pachipataamagawidwa kukhala aOS&Y tsindendi aTsinde losakwera.Valve yotseka sichitha.
2.Mfundo yogwira ntchito
Pamene valavu yotseka imatsegulidwa ndi kutsekedwa, tsinde limatuluka, ndiko kuti, pamene gudumu lamanja likutembenuzidwa, gudumu lamanja lidzazungulira ndikukweza pamodzi ndi tsinde.Thevalve pachipataamazungulira gudumu lamanja kuti tsinde la valve lisunthike mmwamba ndi pansi, ndipo malo a gudumu lamanja amakhalabe osasintha.Mtengo wothamanga ndi wosiyana, ndivalve pachipataimayenera kutsegulidwa kwathunthu kapena kutsekedwa kwathunthu, koma valve yoyimitsa sikufunika.Valavu yotseka ili ndi njira zolowera ndi zotuluka;ndivalve pachipatailibe njira yolowera ndi potuluka.
Komanso, avalve pachipataili ndi zigawo ziwiri zokha: kutsegulidwa kwathunthu kapena kutsekedwa kwathunthu, chipata chotsegula ndi kutseka ndi chachikulu, ndipo nthawi yotsegula ndi yotseka ndi yaitali.Kuthamanga kwa valavu ya valve ya valve yotseka kumakhala kochepa kwambiri, ndipo mbale ya valve ya valve yotseka imatha kuimitsidwa pamalo ena panthawi ya kayendetsedwe ka kayendedwe ka kayendedwe ka kayendedwe kake.Thevalve pachipataitha kugwiritsidwa ntchito podula, ndipo ilibe ntchito zina.
3.Kusiyana kwa magwiridwe antchito
Valve yotseka imatha kugwiritsidwa ntchito podula komanso kusintha koyenda.Kukaniza kwamadzimadzi kwa valve yapadziko lonse lapansi ndikokulirapo, ndipo kumakhala kovuta kwambiri kutsegula ndi kutseka, koma chifukwa mtunda pakati pa mbale ya valve ndi malo osindikizira ndi waufupi, sitiroko yotsegula ndi yotseka imakhala yochepa.
Chifukwa ndivalve pachipataimatha kutsegulidwa kwathunthu ndikutsekedwa kwathunthu, ikatsegulidwa kwathunthu, kukana kwa sing'anga mumsewu wa valavu kumakhala pafupifupi zero, kotero kutsegula ndi kutseka kwavalve pachipatazidzakhala zopulumutsa ntchito, koma chipata chili kutali ndi malo osindikizira ndipo nthawi yotsegula ndi yotseka ndi yaitali.
4.Kuyika ndi kuyenda
Zotsatira za valve yachipata kumbali zonsezo ndizofanana.Palibe chofunikira panjira yolowera ndi potuluka kuti muyike, ndipo sing'angayo imatha kuzungulira mbali zonse ziwiri.Valve yoyimitsa iyenera kukhazikitsidwa motsatira malangizo omwe akuwonetsedwa ndi muvi pa thupi la valve.Palinso chikhazikitso chomveka bwino chokhudza njira yolowera ndi kutuluka kwa valve yoyimitsa.Njira yoyendetsera ya valve yoyimitsa iyenera kukhala kuchokera pamwamba mpaka pansi.
Valve yotseka ndi yotsika mkati komanso yokwera kunja.Kuchokera kunja, zikuwonekeratu kuti payipi siili pamzere wopingasa wa gawo limodzi.Thevalve pachipatanjira yotuluka ili pamzere wopingasa.Mphamvu yavalve pachipatandi yayikulu kuposa ya valve yoyimitsa.
Kuchokera pakuwona kukana koyenda, kukana koyenda kwa thevalve pachipatandi yaying'ono ikatsegulidwa kwathunthu, ndipo kukana koyenda kwa valve yoyimitsa katundu ndi yayikulu.The flow resistance resistance coefficient of wambavalve pachipatapafupifupi 0.08 ~ 0.12, mphamvu yotsegula ndi yotseka ndi yaying'ono, ndipo sing'anga imatha kuyenda mbali ziwiri.Kukana koyenda kwa ma valve wamba otseka ndi 3-5 kuwirikiza kawirima valve pachipata(nambala ya anthu: mpope steward).Potsegula ndi kutseka, iyenera kukakamizidwa kutseka kuti ikwaniritse chisindikizo.Chovala cha valve cha valve yoyimitsa sichimalumikizana ndi malo osindikizira pamene chatsekedwa kwathunthu, kotero kuvala kwa malo osindikizira kumakhala kochepa kwambiri.Valavu yoyimitsa yomwe ikufunika kuwonjezera actuator chifukwa cha mphamvu yayikulu yoyenda iyenera kulabadira kuwongolera kwa torque.
Pali njira ziwiri zoyika valve yotseka.Chimodzi ndi chakuti sing'angayo imatha kulowa pansi pa chigawo cha valve.Ubwino wake ndi wakuti kulongedza sikukugogomezedwa pamene valavu yatsekedwa, yomwe ingathe kupititsa patsogolo moyo wautumiki wa kulongedza ndipo ikhoza kunyamula kupanikizika mu payipi kutsogolo kwa valve.Pazimenezi, zonyamula ziyenera kusinthidwa;choyipa ndichakuti kuthamanga kwa valavu kumakhala kwakukulu, komwe kumakhala pafupifupi 1 nthawi yakuyenda kumtunda, mphamvu ya axial pa tsinde la valve ndi yayikulu, ndipo tsinde la valve ndi losavuta kupindika.Choncho, njirayi nthawi zambiri imakhala yoyenera kwa ma valve oima ang'onoang'ono (pansi pa DN50).Pa ma valve oyimitsa pamwamba pa DN200, sing'angayo imayenda kuchokera pamwamba.(Vavu yotseka yamagetsi nthawi zambiri imatenga njira yomwe sing'anga imalowera kuchokera pamwamba.) Kuipa kwa njira yomwe sing'angayo imalowera kuchokera pamwamba ndi yosiyana kwambiri ndi njira yolowera kuchokera pansi.
Nthawi yotumiza: Sep-03-2021