Ma valve a mpira ndi ena mwa ma valve omwe amagwiritsidwa ntchito kwambiri m'mafakitale ndi nyumba zogona chifukwa chodalirika, kulimba, komanso kugwira ntchito mosavuta. Nkhaniyi ikufotokoza zomwe valve ya mpira ili, zigawo zake zofunikira (thupi, mpira, mpando), magulu, kupanikizika ndi kukula kwake, ndi njira zowonetsera. Kaya ndinu mainjiniya, katswiri wogula zinthu, kapena wokonda DIY, bukuli likuthandizani kumvetsetsa momwe mungasankhire valavu yoyenera ya mpira pazosowa zanu.
Kodi Valve ya Mpira ndi chiyani
A valavu ya mpirandi valavu yokhota kota yomwe imagwiritsa ntchito mpira wopanda bowo, wopindika, komanso wopindika kuti azitha kuyendetsa madzimadzi. Pamene bowo la mpira likugwirizana ndi payipi, madzimadzi amayenda momasuka; kuzungulira mpira madigiri 90 kumatchinga kuyenda kwathunthu. Mapangidwe ake osavuta amatsimikizira kugwira ntchito mwachangu, kutayikira pang'ono, komanso kugwirizana ndi madzi, mafuta, gasi, ndi media zowononga.
Zigawo Zofunikira za Vavu ya Mpira
1. Thupi la Vavu ya Mpira
Thevalavu ya mpirandi chigoba chakunja chomwe chimakhala ndi zigawo zamkati. Nthawi zambiri amapangidwa ndi zinthu zolimba monga chitsulo chosapanga dzimbiri, mkuwa, kapena PVC, kutengera ntchito. Mapangidwe a thupi amatsimikizira kuchuluka kwa ma valve ndi mtundu wolumikizira (ulusi, flanged, kapena wafer).
2. Mpira Wavavu Mpira
Thempira wa valvendi gawo lozungulira lomwe lili ndi bowo (dzenje) kudutsa pakati pake. Nthawi zambiri imakhala ndi chrome-yokutidwa kapena yokutidwa ndi zinthu monga PTFE kuti muchepetse mikangano komanso kukana dzimbiri. Kukonzekera bwino kwa mpira kumatsimikizira kusindikiza kolimba komanso kugwira ntchito bwino.
3. Mpando wa Vavu ya Mpira
Thempando wa valve mpirandi gawo lokhala ngati mphete lomwe limapanga chisindikizo pakati pa mpira ndi thupi. Mipando nthawi zambiri imakhala yopangidwa ndi zinthu zofewa monga PTFE kapena kulimbikitsa thermoplastics kuti zitsimikizidwe kuti sizingadutse, ngakhale pamavuto akulu.
Mitundu Yama Vavu A Mpira Kutengera Mtundu Wolumikizira
1. Vavu ya Mpira Wopangidwa ndi Threaded
A valavu ya mpiraimakhala ndi ulusi wachimuna kapena wachikazi kumapeto kwake, zomwe zimalola kuti ziwonjezedwe m'mapaipi. Oyenera ku nyumba zokhala ndi mphamvu zochepa (mwachitsanzo, mapaipi, HVAC), mavavuwa ndi otsika mtengo komanso osavuta kuyika popanda kuwotcherera.
Mapulogalamu:
- Madzi a m'nyumba
- Mizere ya gasi
- Kachitidwe ka mafakitale ang'onoang'ono
2. Flanged Ball Valve
A valavu ya mpira wa flangedali ndi malekezero opindika omangika ku mapaipi a mapaipi. Ma valve awa amagwira ntchito zothamanga kwambiri komanso zazikulu, zomwe zimapereka kukonza kosavuta ndi kusokoneza. Ma gaskets pakati pa flanges amatsimikizira kulumikizana kotetezeka, kopanda kutayikira.
Mapulogalamu:
- Mapaipi amafuta ndi gasi
- Makina opangira ma Chemical
- Malo opangira madzi
3. Vavu ya Mpira Wafer
A valavu ya mpira(kapena *clamp-style ball valve*) imayikidwa pakati pa mapaipi awiri omwe amagwiritsa ntchito mabawuti. Mavavuwa ndi opepuka komanso opepuka, amafanana ndi machitidwe oletsa malo koma alibe zolumikizira zomaliza, kudalira kukakamiza kwa flange kuti asindikize.
Mapulogalamu:
- Kukonza zakudya ndi zakumwa
- Makina apakatikati a HVAC
- Low-pressure hydraulic systems
Magawo a Ball Valve ndi Design
1. Vavu Yoyandama ya Mpira
Mpirawo umagwiridwa ndi mipando iwiri ndipo umayandama pang'ono pansi pa kupanikizika. Oyenera ma valve ang'onoang'ono mpaka apakatikati, mapangidwewa ndi okwera mtengo koma amatha kulimbana ndi mawotchi othamanga kwambiri.
2. Vavu ya Mpira wa Trunnion
Mpira umakhazikika ndi kachipangizo ka trunnion (pivot), kuchepetsa torque yogwira ntchito komanso kuthana ndi zovuta zambiri. Zofala m'mapaipi amafuta ndi gasi.
3. Port Full vs
- Valve Yathunthu ya Port Ball: Kubowola kumafanana ndi m'mimba mwake, kumachepetsa kukana koyenda.
- Valve ya Mpira wa Port Ball yochepetsedwa: Kubowola ndi kocheperako, kumachepetsa kukula kwa vavu ndi mtengo wake koma kumawonjezera kutsika kwamphamvu.
Miyezo ya Kupanikizika kwa Ball Valve ndi Makulidwe
Pressure Ratings
Mavavu a mpira amavoteredwa potengera kukakamiza kwawo kovomerezeka (mwachitsanzo, ANSI Class 150, 300, 600). Magulu apamwamba amasonyeza kukana kwambiri kupanikizika. Mwachitsanzo:
- Gawo 150: 285 PSI pa 100°F
- Gawo la 600: 1,440 PSI pa 100°F
Zinthu Zomwe Zimakhudza Kuthamanga Kwambiri:
- Mphamvu zakuthupi
- Mpando ndi kusindikiza umphumphu
- Mtundu wamalumikizidwe (ma valve opindika amanyamula kupsinjika kwakukulu)
Miyezo ya Kukula
Kukula kwa ma valve a mpira kumachokera ku ¼ inchi (yogwiritsa ntchito kunyumba) mpaka mainchesi 48 (mapaipi akumafakitale). Mfundo zodziwika bwino ndi izi:
- NPT (National Pipe Thread): Kwa mavavu a ulusi.
- ASME B16.10: Kwa miyeso ya maso ndi maso.
- ASME B16.5: Kwa valavu flanged.
Njira Zowonetsera Mpira Valve
1. Kusintha pamanja
Amagwiritsidwa ntchito ndi lever kapena handwheel. Zabwino kwa ma valve ang'onoang'ono kapena makina omwe amafunikira kusintha pafupipafupi.
2. Pneumatic Actuation
Amagwiritsa ntchito mpweya woponderezedwa kuti agwiritse ntchito ma valve. Zoyenera kumadera akutali kapena owopsa.
3. Kusintha kwa Magetsi
Mothandizidwa ndi ma motors amagetsi, kupangitsa kuphatikizika ndi machitidwe owongolera kuti azitha kuyendetsa bwino kwambiri.
Momwe Mungasankhire Vavu Yoyenera ya Mpira
1. Media Compatibility: Onetsetsani kuti zida (thupi, mpira, mpando) zisachita dzimbiri kuchokera kumadzimadzi.
2. Kupanikizika ndi Kutentha: Fananizani mlingo wa valve ndi zofunikira za dongosolo.
3. Mtundu Wolumikizira: Sankhani ulusi, flanged, kapena wafer kutengera kapangidwe mapaipi.
4. Kukula kwa Port: Sankhani ma valve odzaza ma doko a machitidwe othamanga kwambiri.
5. Zochitika: Automate ngati kusintha pafupipafupi kapena chiwongolero chakutali chikufunika.
Mapeto
Ma valve a mpira ndi osinthika, okhazikika, komanso ofunikira pakuwongolera kutuluka kwamadzi m'mafakitale. Kumvetsetsa zigawo zawo -valavu ya mpira, mpira,ndimpando-pamodzi ndi mitundu ngatiulusi, flanged,ndimtandamavavu a mpira, amatsimikizira magwiridwe antchito abwino kwambiri. Poganizira za kukakamizidwa, kukula kwake, ndi njira zoyendetsera, mutha kusankha valavu yomwe imakwaniritsa zomwe mukufuna. Nthawi zonse muzigwirizana ndi opanga odziwika bwino kuti mutsimikizire mtundu wake komanso kutsata miyezo yamakampani.
Nthawi yotumiza: Mar-20-2025