4 mipira yothina
Chofunika kwambiri mpando kusindikiza zakuthupi kwama valve a mpirandi polytetraoxyethylene (PTFE), yomwe imakhudzidwa ndi pafupifupi zinthu zonse za mankhwala, ndipo imakhala ndi coefficient yotsika yogundana, yokhazikika, yokhazikika, yosakalamba, yogwiritsira ntchito kutentha kwakukulu ndi kusindikiza machitidwe abwino kwambiri.Komabe, mawonekedwe akuthupi a PTFE, kuphatikiza kuchuluka kwachulukidwe kopitilira muyeso, kukhudzika kwa kuzizira komanso kusayenda bwino kwamafuta, kumafunikira mapangidwe a zisindikizo zapampando wa ma valve kuti aganizire za izi.Zida zapulasitiki zosindikizira mpando wa valve zimaphatikizanso PTFE yodzaza, nayiloni ndi zida zina zambiri.Komabe, pamene zinthu zosindikizira zimakhala zolimba, kudalirika kwa chisindikizo kudzawonongeka, makamaka pakakhala kusiyana kwapakati.Kuphatikiza apo, mphira wopangira monga mphira wa butyl atha kugwiritsidwanso ntchito ngati zida zosindikizira mpando wa ma valve, koma mankhwala ake ogwiritsira ntchito sing'anga ndi kutentha ndi ochepa.Komanso, ngati sing'anga si mafuta, kugwiritsa ntchito mphira kupanga mwina kupanikizana mpira.
Pofuna kukwaniritsa zofunikira zogwiritsira ntchito mafakitale monga kutentha kwakukulu, kuthamanga kwambiri, kukokoloka kwamphamvu, moyo wautali, ndi zina zotero, ma valve otsekedwa ndi zitsulo apangidwa kwambiri m'zaka khumi zapitazi.Makamaka m'mayiko otukuka mafakitale, monga United States, Italy, Germany, Spain, Netherlands, etc., dongosolo la valavu mpira wakhala mosalekeza bwino, ndipo pakhala onse welded thupi mwachindunji-kukwiriridwa mavavu mpira, kukweza. mavavu a mpira, ndi mavavu a mpira m'mapaipi akutali, zida zoyenga mafuta, ndi zina zambiri. Malo ogulitsa mafakitale amagwiritsidwa ntchito kwambiri, okhala ndi m'mimba mwake (3050mm), kuthamanga (70MPa) ndi kutentha kwakukulu (-196 ~ 8159C) mavavu a mpira akuwonekera, kotero kuti ukadaulo wa valavu ya mpira wafika pamlingo watsopano.
5 Kupanga ma valve ndi kupanga
Chifukwa cha kugwiritsa ntchito Computer Aided Design (CAD), Computer Aided Manufacturing (CAM) ndi Mulberry Manufacturing System (FMS) m'makampani a valve, mapangidwe ndi kupanga ma valve a mpira afika pamlingo watsopano.Sikuti adangopanga njira yowerengera mavavu, komanso adachepetsa ntchito yolemetsa komanso yobwerezabwereza ya akatswiri ndi akatswiri, kuti amisiri akhale ndi mphamvu zowonjezera, kuwongolera magwiridwe antchito ndi chitukuko chazinthu zatsopano, ndikufupikitsa kafukufukuyo ndi chitukuko mkombero wa zinthu zatsopano., Kupititsa patsogolo ntchito zokolola m'njira zonse, komanso pofufuza ndi chitukuko cha kukweza ndodo yamtundu wazitsulo zosindikizira mpira, chifukwa cha kugwiritsa ntchito CAD/CAM, ndodo yozungulira yozungulira yopangidwa ndi makompyuta ndi makompyuta. -Zida zothandizira makina a CNC zawonekera, zomwe ndi chisindikizo chachitsulo.Valve ya mpira ilibe zokopa ndi kuvala panthawi yotsegulira ndi kutseka, kuti ntchito yosindikiza ndi moyo wautumiki wa valve ya mpirawo ukhale bwino kwambiri.Vavu ya mpira ikatsegulidwa kwathunthu, kukana koyenda kumakhala kochepa kwambiri, pafupifupi kofanana ndi zero, kotero valavu yofanana ya mpira imagwiritsidwa ntchito kwambiri pamapaipi amafuta ndi gasi chifukwa ndikosavuta kuyeretsa payipi.Chifukwa mpira wa valavu ya mpira umapukutidwa panthawi yotsegulira ndi kutseka, ma valve ambiri a mpira angagwiritsidwe ntchito pazofalitsa ndi tinthu tating'ono tomwe timayimitsidwa.Kutengera ndi zinthu za mphete yosindikiza, itha kugwiritsidwanso ntchito mu ufa ndi granular media.
6 valavu ya mpira nthawi yoyenera
Popeza valavu ya mpira nthawi zambiri imagwiritsa ntchito mphira, nayiloni ndi polytetraoxyethylene monga mphete yosindikizira mpando, kutentha kwake kumachepetsedwa ndi mphete yosindikizira mpando wa valve.Zotsatira zodulidwa za m'lifupi mwa mpira zimapindula ndi mpira wachitsulo woponderezedwa wina ndi mzake pakati pa mipando ya valve ya pulasitiki pansi pa zochita za sing'anga (valavu yoyandama ya mpira).Pansi pa kukakamizidwa kwina kolumikizana, mphete yosindikizira mpando wa vavu imapunduka mokhazikika komanso mwapulasitiki m'malo ena.Kupindika kumeneku kungathe kulipira kulondola kwa kupanga ndi kuuma kwapamwamba kwa mpira, ndikuwonetsetsa kusindikiza kwa valve ya mpira.
Kuonjezera apo, popeza mphete yosindikizira mpando wa valve ya mpira nthawi zambiri imakhala yopangidwa ndi pulasitiki, posankha mapangidwe ndi ntchito ya valve ya mpira, m'pofunika kuganizira za kukana moto ndi kukana moto kwa valve ya mpira, makamaka mu petroleum. mankhwala, zitsulo ndi zigawo zina, muzofalitsa zoyaka moto ndi zophulika Kugwiritsa ntchito ma valve a mpira mu zipangizo ndi makina a mapaipi a United States ayenera kusamala kwambiri kukana moto ndi kuteteza moto.
Nthawi zambiri, pakusintha kwamitundu iwiri, kusindikiza kolimba, matope, abrasion, njira yotsekera, kutsegula ndi kutseka mwachangu (1/4 kutembenuka ndi kutseka), kutsika kwamphamvu (kusiyana kwakukulu), phokoso lochepa, cavitation ndi vaporization, M'makina opopera omwe ali ndi kutayikira pang'ono kumlengalenga, torque yaying'ono yogwira ntchito komanso kukana kwamadzimadzi pang'ono, ma valve a mpira amalimbikitsidwa.
Mavavu a mpira ndi oyeneranso pamakina opangira mapaipi okhala ndi mawonekedwe opepuka, odulidwa otsika (kusiyana kwapang'onopang'ono), komanso media zowononga.
Ma valve a mpira amathanso kugwiritsidwa ntchito pazida zotsika (cryogenic) ndi mapaipi.
M'mapaipi a oxygen amakampani opanga zitsulo, ma valve a mpira omwe adalandira chithandizo chokhazikika cha degreasing amafunikira.
Pamene mizere ikuluikulu ya mapaipi amafuta ndi gasi iyenera kukwiriridwa pansi pa nthaka, mavavu a mpira wowotcherera amafunikira.
Pamene kusintha ntchito kumafunika, valve ya mpira yokhala ndi mawonekedwe apadera okhala ndi V-mawonekedwe a V iyenera kusankhidwa.
Mu petroleum, petrochemical, chemical, magetsi, ndi zomangamanga m'matauni, zitsulo-to-zitsulo losindikizidwa mavavu mpira angagwiritsidwe ntchito pa mapaipi ndi kutentha ntchito pamwamba 200 ° C.
7 Mfundo zogwiritsira ntchito ma valve a mpira
Kwa mapaipi amafuta ndi gasi, mapaipi omwe amafunikira kutsukidwa, ndi kukwiriridwa pansi, amagwiritsa ntchito ma valve onse odutsa ndi zitsulo zonse;kwa kukwiriridwa pansi, sankhani mavavu a mpira opindika kapena opindika;mapaipi anthambi, Sankhani kugwirizana kwa flange, kugwirizana kwa kuwotcherera, kupitirira kapena kuchepetsedwa kwa valavu ya mpira.
Kwa mapaipi oyendera ndi zida zosungiramo mafuta oyengedwa, gwiritsani ntchito ma valve opindika a mpira.
Pamapaipi a gasi amzinda ndi gasi, gwiritsani ntchito mavavu oyandama a mpira olumikizana ndi flange ndi ulusi wamkati.
M'mapaipi a okosijeni muzitsulo zazitsulo, valavu ya mpira yokhazikika yomwe yakhala ikugwiritsidwa ntchito pochotsa mafuta ndi kugwirizanitsa flanged iyenera kugwiritsidwa ntchito.
Kwa machitidwe ndi zida zapaipi zotsika kutentha, ma valve otsika otsika a mpira okhala ndi mabonati ayenera kugwiritsidwa ntchito.M'mapaipi opangira zida zoyenga zamafuta, valavu yamtundu wonyamulira imatha kusankhidwa.
Pazida ndi mapaipi azinthu zowononga monga asidi ndi alkali m'machitidwe amankhwala, ndikofunikira kugwiritsa ntchito mavavu onse osapanga dzimbiri opangidwa ndi chitsulo chosapanga dzimbiri cha austenitic ndi polytetraoxyethylene monga mpando ndi mphete yosindikiza.
Ma valve osindikizira a Metal-to-metal angagwiritsidwe ntchito pamapaipi kapena zida zowonera kutentha kwambiri pamakina azitsulo, makina amagetsi, kuyika kwa petrochemical, ndi makina otenthetsera m'matauni.
Pamene kusintha koyenda kumafunika, galimoto yoyendetsa nyongolotsi, mpweya wa pneumatic kapena mpira wamagetsi wokhala ndi V-mawonekedwe a V akhoza kusankhidwa.