1. Mfundo yofunika:
Vavu ya Mpira: Gawo lotsegula ndi lotseka la valavu ya mpira ndi lozungulira, ndipo cholinga chotsegula ndi kutseka chimakwaniritsidwa pozungulira 90 ° kuzungulira tsinde la valve.Valavu ya mpira imagwiritsidwa ntchito makamaka kudula, kugawa ndikusintha njira yoyendetsera sing'anga papaipi.Valve ya mpira yopangidwa ndi kutsegulira kooneka ngati V imakhalanso ndi ntchito yabwino yosinthira kuyenda.
Vavu ya Chipata: membala wotseka (Wedge) amayenda motsatira njira yolowera njirayo amagwiritsidwa ntchito kwambiri podula sing'anga papaipi, ndiye kuti, yotseguka kapena yotsekedwa kwathunthu.Kawirikawiri, ma valve a pakhomo sangathe kugwiritsidwa ntchito kuti ayendetse bwino.Ikhoza kugwiritsidwa ntchito pa kutentha kwapansi kapena kutentha kwakukulu ndi kuthamanga kwambiri, ndipo ingagwiritsidwe ntchito molingana ndi zipangizo zosiyanasiyana za valve.
2. Ubwino ndi Kuipa kwake
2.1 Ubwino wa valavu ya mpira
1) Imakhala ndi kukana otsika (kwenikweni 0);itha kugwiritsidwa ntchito modalirika pazida zowononga komanso pazamadzimadzi zowira pang'ono chifukwa sichidzakakamira pakugwira ntchito (popanda mafuta);
2) , mu mphamvu yaikulu ndi kutentha osiyanasiyana, akhoza kukwaniritsa kusindikiza kwathunthu;
3) Imatha kuzindikira kutseguka ndi kutseka mwachangu, ndipo nthawi yotsegulira ndi kutseka yazinthu zina ndi 0.05 ~ 0.1s yokha kuti iwonetsetse kuti ingagwiritsidwe ntchito pamachitidwe odzichitira okha a benchi yoyesera.Pamene valve imatsegulidwa ndi kutsekedwa mwamsanga, ntchitoyo ilibe mphamvu;
4) .Kutseka kozungulira kungathe kukhazikitsidwa pamalo amalire
5) .Pamene kutsegulidwa kwathunthu ndi kutsekedwa kwathunthu, malo osindikizira a mpira ndi mpando wa valve amasiyanitsidwa ndi sing'anga, kotero sing'anga yomwe imadutsa mu valve pa liwiro lalikulu sichidzachititsa kukokoloka kwa malo osindikizira;
6) .Ndi mawonekedwe ophatikizika komanso kulemera kwake, imatha kuonedwa ngati njira yabwino kwambiri yopangira ma valve otsika kutentha kwapakati;
7) Thupi la valavu ndi lofanana, makamaka mawonekedwe amtundu wa valavu, omwe amatha kupirira kupsinjika kwa payipi;
8) Gawo lotsekera limatha kupirira kusiyana kwakukulu pakutseka.
9).Valavu ya mpira yokhala ndi ma valavu otsekedwa mokwanira imatha kukwiriridwa pansi, kuti ma valve mkati asawonongeke, ndipo moyo wautumiki ukhoza kufika zaka 30.Ndi valavu yabwino yamapaipi amafuta ndi gasi.
2.2 Kuipa kwa valavu ya mpira
Chifukwa chofunika kwambiri pampando wosindikizira mphete ya valavu ya mpira ndi polytetrafluoroethylene, ndi inert pafupifupi zinthu zonse mankhwala, ndipo ali ndi makhalidwe ang'onoang'ono mikangano coefficient, ntchito khola, si yosavuta kukalamba, osiyanasiyana kutentha ndi ntchito yabwino yosindikiza.Mawonekedwe athunthu.
Koma thupi katundu wa PTFE, kuphatikizapo mkulu coefficient kukula, tilinazo ozizira otaya, ndi osauka matenthedwe madutsidwe, amafuna kuti mipando chisindikizo mapangidwe ayenera kumangidwa mozungulira katundu.Choncho, pamene zinthu zosindikizira zimakhala zovuta, kudalirika kwa kusindikiza kumawonongeka.
Kuphatikiza apo, PTFE ili ndi kalasi yotsika yokana kutentha ndipo ingagwiritsidwe ntchito pansi pa 180 °C.Pamwamba pa kutentha uku, zinthu zosindikizira zidzawonongeka.Pogwiritsa ntchito nthawi yayitali, nthawi zambiri amagwiritsidwa ntchito pa 120 ° C.
2.3 Ubwino wa vavu pachipata
1) Kukana koyenda kumakhala kochepa.Njira yapakatikati mkati mwa thupi la valve ndi yowongoka, sing'anga imayenda molunjika, ndipo kukana koyenda kumakhala kochepa.
2) Zimapulumutsa ntchito kwambiri potsegula ndi kutseka.Poyerekeza ndi valavu yapadziko lonse lapansi, chifukwa ngakhale ili yotseguka kapena yotsekedwa, kayendetsedwe ka kayendedwe ka chipata ndi perpendicular kwa kayendedwe ka sing'anga.
3) Kutalika ndi kwakukulu ndipo nthawi yotsegula ndi yotseka ndi yaitali.Kutsegula ndi kutseka kwa chitseko ndi chachikulu, ndipo kukweza ndi kutsika kumachitika ndi screw.
4) Chochitika cha nyundo yamadzi sichophweka kuchitika.Chifukwa chake ndi nthawi yayitali yotseka.
5) Sing'anga imatha kuyenda mbali iliyonse kumbali zonse ziwiri, zomwe zimakhala zosavuta kuziyika.Njira ya valve pachipata ndi yofanana mbali zonse.
2.4 Kuipa kwa vavu pachipata
1) N'zosavuta kuyambitsa kukokoloka ndi zokanda pakati pa malo osindikizira, ndipo kukonza kumakhala kovuta kwambiri.
3) Miyeso yakunja ndi yayikulu, malo ena amafunikira kuti atsegulidwe, ndipo nthawi yotsegula ndi yotseka ndi yayitali.
4) Mapangidwewo ndi ovuta kwambiri.
Kodi mavavu a mpira ali bwino kuposa ma valve a zipata?
Ubwino wa mavavu a mpira pamwamba pa ma valve a pachipata ndikuti amasindikiza mwamphamvu kwambiri, motero amalimbana ndi kutayikira kuposa ma valve a pachipata.Izi ndichifukwa cha kuchotsera kwawo 100%.Kuphatikiza apo, ma valve a mpira ndi osavuta kugwiritsa ntchito kuposa ma valve a pachipata, amakhala ndi kulephera kochepa, ndipo amakhala nthawi yayitali.
Makhalidwe a ma valve a mpira amawapangitsa kukhala abwino kutseka madzi owongolera.
Ma valve a mpira amachita bwino nthawi zambiri pambuyo pa mikombero yambiri ndipo ndi odalirika komanso amatha kutseka mosatekeseka ngakhale atakhala nthawi yayitali osagwira ntchito.Pazifukwa izi, ma valve a mpira nthawi zambiri amakondedwa kuposa ma valve a zipata ndi globe.
Koma pansi pa kupanikizika komweku ndi kukula kwake, valve ya mpira ndi yokwera mtengo kuposa valve yachipata.
Nthawi yotumiza: Jun-06-2022