Tiyeni tiwone kusiyana kotani pakati pa valavu yapadziko lonse lapansi ndi avalve pachipata.
01
Kapangidwe
Malo oyikapo akakhala ochepa, samalani zomwe zasankhidwa:
Thevalve pachipataakhoza kudalira kuthamanga kwapakatikati kuti atseke mwamphamvu malo osindikizira, kuti akwaniritse zotsatira za kutayikira.Mukatsegula ndi kutseka, pachimake cha valve ndi malo osindikizira a mpando wa valve nthawi zonse amalumikizana ndikusisita wina ndi mzake, kotero kuti kusindikiza pamwamba kumakhala kosavuta kuvala, ndipo pamenevalve pachipatayatsala pang'ono kutseka, kusiyana kwapakati pakati pa kutsogolo ndi kumbuyo kwa payipi ndi kwakukulu kwambiri, zomwe zimapangitsa kuti malo osindikizira azikhala ovuta kwambiri.
Mapangidwe avalve pachipataZidzakhala zovuta kwambiri kuposa valavu yapadziko lonse lapansi, kuchokera kumawonekedwe, pamtundu womwewo, valavu yachipata ndi yapamwamba kuposa valavu yapadziko lonse, ndipo valavu yapadziko lonse ndi yaitali kuposavalve pachipata.Komanso, avalve pachipataimagawidwa kukhala ndodo yowala ndi ndodo yakuda.Ma valve otseka samatha.
Momwe zimagwirira ntchito
Pamene valavu ya globe imatsegulidwa ndi kutsekedwa, ndi tsinde lokwera, ndiko kuti, pamene gudumu lamanja likuzungulira, gudumu lamanja lidzazungulira ndikukweza ndi tsinde.Thevalve pachipatandi kuzungulira handwheel kuti tsinde valavu kuchita kukweza kayendedwe, ndi malo a handwheel palokha amakhalabe osasintha.
Mayendedwe amasiyanasiyana, ndima valve pachipatakumafuna kutseka kwathunthu kapena kutseka kwathunthu, pomwe mavavu a globe samatero.Valve yapadziko lonse lapansi ili ndi njira yolowera ndi njira yotulutsira, komansovalve pachipatailibe njira yolowera ndi potuluka.
Komanso, avalve pachipataali ndi zigawo ziwiri zokha: kutsegulidwa kwathunthu kapena kutsekedwa kwathunthu, ndipo kugunda kwa kutsegula ndi kutseka kwa mbale ya chipata ndi yaikulu kwambiri, ndipo nthawi yotsegula ndi yotseka ndi yaitali.Kusuntha kwa valavu ya valve yapadziko lonse lapansi ndi yaying'ono kwambiri, ndipo valavu ya valve ya globe imatha kuyima pamalo ena kuti isinthe.Thevalve pachipataangagwiritsidwe ntchito podulira ndipo alibe ntchito zina.
Kusiyana kwa machitidwe
Valve yapadziko lonse lapansi imatha kugwiritsidwa ntchito podula komanso kuwongolera kuyenda.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, ikatsegulidwa kwathunthu, kukana kwapakati pamayendedwe a valve thupi kumakhala pafupifupi 0, kotero kutsegula ndi kutseka kwavalve pachipataZidzakhala zopulumutsa ntchito, koma mbale ya pachipata ili kutali ndi malo osindikizira, ndipo nthawi yotsegula ndi yotseka ndi yaitali.
04
Kuyika ndi njira yoyendetsera
Zotsatira zavalve pachipatanjira yolowera mbali zonse ziwiri ndi yofanana, palibe chofunikira panjira yolowera ndi kutulutsa, ndipo sing'anga imatha kuyenda mbali zonse ziwiri.Valavu yapadziko lonse lapansi iyenera kukhazikitsidwa motsatira malangizo omwe alembedwa ndi muvi wa valavu, ndipo pali makonzedwe omveka bwino panjira yolowera ndi kutuluka kwa valavu yapadziko lonse lapansi, ndi njira yolowera ya valavu yapadziko lonse lapansi. kutengera kuchokera pamwamba mpaka pansi molingana ndi "kusintha kutatu" kwa valve yaku China.
Valve yotsekera imakhala yotsika komanso yotsika, ndipo kuchokera kunja pali chitoliro chomveka chomwe sichili pamlingo wa gawo limodzi.Thevalve pachipatanjira yotuluka ili pamzere wopingasa.Mphamvu yavalve pachipatandi yayikulu kuposa ya valavu yapadziko lonse lapansi.
Kuchokera pakuwona kukana kothamanga, pamene kutseguka kwathunthu, kukana kwa valve ya chipata kumakhala kochepa, ndipo kukana kwa valve yoyimitsa katundu ndi kwakukulu.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 mavavu wamba padziko lonse lapansi ndi nthawi 3-5 kuposama valve pachipata.Kutsegula ndi kutseka kumafunika kukakamizika kutseka kuti mukwaniritse kusindikiza, spool ya valavu ya globe imatsekedwa kwathunthu pamene ikugwirizana ndi kusindikiza pamwamba, kotero kuvala kwa kusindikiza pamwamba kumakhala kochepa kwambiri, chifukwa cha kutuluka kwakukulu kwa mphamvu yaikulu. kuwonjezera actuator wa valavu globe ayenera kulabadira kuwongolera torque makina kusintha.
Pali njira ziwiri zoyika valavu ya globe, imodzi ndi yakuti sing'anga imatha kulowa pansi pa spool, ubwino wake ndi wakuti kulongedza sikukupanikizika pamene valve yatsekedwa, yomwe imatha kupititsa patsogolo moyo wautumiki wa kulongedza, ndipo ikhoza kusintha. kulongedza pamene payipi kutsogolo kwa valavu ndi kupanikizika;Choyipa ndichakuti kuthamanga kwa valavu ndi kwakukulu, komwe kumakhala pafupifupi 1 nthawi yakuyenda kumtunda, mphamvu ya axial ya tsinde la valve ndi yayikulu, ndipo tsinde la valve ndi losavuta kupindika.
Choncho, njira imeneyi nthawi zambiri ndi yoyenera mavavu ang'onoang'ono a globe (DN50 kapena kuchepera), ndipo ma valve apamwamba pamwamba pa DN200 amagwiritsa ntchito sing'anga yomwe ikuyenda kuchokera pamwamba.(Ma valve a magetsi a globe nthawi zambiri amagwiritsa ntchito sing'anga kuti alowe kuchokera pamwamba.) Kuipa kwa njira yolowera m'ma TV kuchokera pamwamba ndi yosiyana kwambiri ndi njira yolowera pansi.
05
Kusindikiza
Kusindikiza pamwamba pa valavu ya globe ndi mbali yaing'ono ya trapezoidal ya valve core (makamaka yang'anani mawonekedwe a valve core), pamene phokoso la valve likugwa, ndilofanana ndi kutseka kwa valve (ngati kusiyana kwapakati ndi kwakukulu, ndithudi, kutseka si okhwima, koma cheke zotsatira si zoipa), ndivalve pachipataimasindikizidwa pambali ya mbale yapachipata cha valve, kusindikiza sikuli bwino ngati valavu yapadziko lonse, ndipo pakati pa valve sichitha kugwa ngati valavu ya globe yofanana ndi kutseka kwa valve.
Nthawi yotumiza: Apr-08-2023