Ndiyenera kuchita chiyani ngati pali kutayikira mkati mwa valavu yoyendera

Onani mavavundi zinthu zofunika kuwongolera madzimadzi m'makampani amakono ndipo pakali pano ndi imodzi mwa mitundu yogwiritsidwa ntchito kwambiri ya mavavu. Zopangira zake ndizochulukirapo, kuphatikiza mitundu yosiyanasiyana ya mavavu monga mtundu wodulidwa, mtundu wowongolera, mtundu wa throttling, mtundu wa singano, ndi mtundu wodulirapo wodulira, womwe umatha kudula mwachangu sing'anga ndikuwongolera ndikuwongolera sing'anga mupaipi.

Mayendedwe unsembe wafufuzani ma valventhawi zambiri imagawidwa m'mitundu iwiri, imodzi ndi yopingasa, ndiko kuti, tsinde la valve la valve liri mu njira yolunjika, ndipo njira yolumikizira valavu imayenderana ndi ndege yopingasa. Mtundu wina ndi mayendedwe ofukula unsembe, kumene tsinde valavu ndi kufanana ndege yopingasa ndi valavu ndime olamulira ndi perpendicular yopingasa ndege. Kuyika kwa mavavu kumatsimikiziridwa ndi mapangidwe a mapaipi a bungwe lopanga mapangidwe, zomwe zikutanthauza kuti kuyika kopingasa komanso koyima ndi njira zodziwika komanso zosapeweka. Pambuyo popanga ndi kusonkhanitsa valavu yapadziko lonse lapansi, kuyesa kosindikiza kumayenera kuchitidwa, ndipo pokhapokha atapambana mayeso angatumizedwe. Nthawi zambiri, valavu imakhala ndi ntchito yabwino yosindikizira panthawi yoyesedwa, koma mavuto otuluka mkati amatha kuchitika pamene valavu yasonkhanitsidwa mu payipi yowongoka.

Kusindikiza pamwamba pafufuzani ma valventhawi zambiri amagawidwa m'mitundu iwiri: kusindikiza kwa lathyathyathya ndi kusindikiza kwa conical. Kutengera ndi mayankho ochokera kumainjiniya, pakuyika koyima kwa ma valavu a cheke, kutayikira kumachitika nthawi zambiri mu mavavu amtundu wa cone seal, omwe nthawi zambiri amatuluka akamagwiritsidwa ntchito koyamba. Komabe, moyo wautumiki wa ma valve osindikizira a globe omwe amaikidwa mopingasa komanso molunjika ndi ofanana.

Kugwirizana kwapangidwe kwa zigawo zamkati za valavu ya cheke ndikuti kumapeto kwa tsinde la valve kumakakamizidwa ndi kunyamula ndi mpando wapamwamba wosindikizira, ndipo kumapeto kwa tsinde la valve kumagwirizanitsidwa ndi diski ya valve kupyolera mu chilolezo chovomerezeka. Kusindikiza pamwamba pa mapeto apansi a diski ya valve kumakhudzana ndi kusindikiza pamwamba pa mpando wa valve kuti apange chisindikizo. Pamene tsinde la valavu likukankhira chimbale cha valve kumpando wa valve, pangakhale kukhudzana kwabwino pakati pa kusindikiza pamwamba pa mpando wa valve ndi diski ya valve. Ma axis a valve disc sealing cone amapatuka kuchokera kumtunda wa valavu yosindikizira mpando. Pamene tsinde la valve likukankhira chimbale cha valve kumpando wa valve, malo osindikizira sangagwirizane ndi kusindikiza, zomwe zimapangitsa kuti ziwonongeke. Kutengera kwa ma disc a valve ndiye chinthu chachikulu chomwe chimayambitsa kutayikira mkati mwa ma valve. Pali zifukwa ziwiri zomwe zimapangitsa kuti valavu ikhale yochuluka kwambiri. Choyamba, pali kusiyana kwa msonkhano pakati pa diski ya valve ndi tsinde la valve, ndipo mutu wa valavu udzapendekera pansi chifukwa cha mphamvu yokoka; Nkhani yachiwiri ndi yakuti pamene tsinde la valve liikidwa mozungulira, limakhala mtengo wa cantilever. Chifukwa cha mphamvu yokoka, tsinde la valve limadutsa pansi, zomwe zimawonjezera kupendekera kwa diski ya valve.