Thevavu yowunikira mbale ziwirindi mtundu wa valavu yoyang'anira yokhala ndi mphamvu yozungulira, koma ndi diski iwiri ndipo imatseka ngati kasupe. Disikiyo imatsegulidwa ndi madzi ochokera pansi kupita mmwamba, valavuyo ili ndi kapangidwe kosavuta, chomangira chimayikidwa pakati pa ma flange awiri, ndipo kukula kwake kochepa komanso kulemera kwake kochepa ndizochepa.
Thevavu yowunikira mbale ziwiriIli ndi ma disc awiri okhala ndi mawonekedwe a D okhala ndi kasupe omwe amaikidwa pa shaft yokhala ndi ribbed kudutsa valavu. Kapangidwe kameneka kamachepetsa mtunda womwe pakati pa mphamvu yokoka ya diski imasuntha. Kapangidwe kameneka kamachepetsanso kulemera kwa diski ndi 50% poyerekeza ndi valavu yowunikira ya single-disc swing-on ya kukula komweko. Chifukwa cha kasupe, valavuyo imagwira ntchito mwachangu kwambiri ikabwerera m'mbuyo.
Kapangidwe ka valavu yowunikira mipando iwiri ya wafer yopepuka kamapangitsa kutseka mipando ndikugwiritsa ntchito bwino kwambiri.
Kachitidwe ka masika a mkono wautali wa gulugufe awirivalavu yoyezeraimalola diski kutseguka ndi kutseka popanda kupukuta mpando, ndipo kasupe amagwira ntchito payekha kutseka diski (DN150 ndi kupitirira apo).
Chikwama chothandizira cha gulugufe wa double-flapvalavu yoyezeraimachepetsa kukangana ndipo imachepetsa nyundo yamadzi ikachotsedwa kudzera mu diski ina (bore lalikulu).
Poyerekeza ndi zachikhalidwema valve oyesera swing,vavu yowunikira mbale ziwiriKapangidwe kake nthawi zambiri kamakhala kolimba, kopepuka, kakang'ono, kogwira mtima, komanso kotsika mtengo. Valavu iyi imakwaniritsa muyezo wa API 594, pa mainchesi ambiri, kukula kwa valavu iyi ndi gawo limodzi mwa magawo anayi okha a valavu yachizolowezi, ndipo kulemera kwake ndi 15% ~ 20% ya valavu yachizolowezi, kotero ndi yotsika mtengo kuposa valavu yowunikira swing. Ndi yosavuta kuyiyika pakati pa ma gaskets wamba ndi ma flange a mapaipi. Chifukwa ndi yosavuta kuyigwira ndipo imafuna mabotolo amodzi okha olumikizira flange, imasunganso zinthu panthawi yoyikira, kusunga ndalama zoyikira komanso ndalama zosamalira tsiku ndi tsiku.
Valavu yowunikira gulugufe yokhala ndi ma double-flap ilinso ndi zinthu zapadera zomangira zomwe zimapangitsa valavu iyi kukhala valavu yowunikira yopanda kukhudza kwambiri. Zinthu izi zikuphatikizapo kutsegula kosayera, kapangidwe ka masika odziyimira pawokha ka ma valve ambiri obowola, ndi makina othandizira ma disc odziyimira pawokha. Zina mwa zinthuzi sizipezeka ndi ma valve owunikira. Valavu yowunikira mbale ziwiri ya wafer ingapangidwenso ndi ma lugs, ma flange awiri ndi thupi lotambasuka.
Choyamba, njira yotsegulira ndi kutseka
Kapangidwe ka ma disc awiriwa kali ndi ma disc awiri okhala ndi ma spring-loaded (semi-discs) omwe amapachikidwa pa pini yolumikizidwa yomwe ili yowongoka pakati. Madzi akayamba kuyenda, disc imatsegulidwa ndi mphamvu (F) yomwe imagwira ntchito pakati pa malo otsekera. Mphamvu yothandizira ma spring-active spring (FS) imagwiritsidwa ntchito pamalo omwe ali kunja kwa pakati pa malo otsekera, zomwe zimapangitsa kuti muzu wa disc utseguke kaye. Izi zimapewa kukangana pamalo otsekera komwe kumachitika pamene disc imatsegulidwa m'ma valve akale, zomwe zimachotsa kuwonongeka ndi kuwonongeka kwa zigawo.
Pamene kuthamanga kwa madzi kukuchepa, kasupe wa torsion umadzichitira wekha, zomwe zimapangitsa kuti diskiyo izitseke ndikuyandikira mpando wa thupi, zomwe zimachepetsa mtunda woyenda ndi nthawi yotseka. Madziwo akamayenda mmbuyo, diskiyo imayandikira mpando wa thupi pang'onopang'ono, ndipo mphamvu ya valavu imathamanga kwambiri, zomwe zimachepetsa mphamvu ya nyundo yamadzi ndikukwaniritsa magwiridwe antchito opanda kukhudza.
Potseka, ntchito ya siteshoni ya mphamvu ya masika imapangitsa kuti pamwamba pa diski patseke kaye, zomwe zimapangitsa kuti pasalumidwe ndi kukangana pa muzu wa diski, kuti valavuyo ikhalebe yolimba kwa nthawi yayitali.
2. Kapangidwe ka masika kodziyimira pawokha
Kapangidwe ka kasupe (DN150 ndi kupitirira apo) kamalola kuti mphamvu yamagetsi igwiritsidwe ntchito pa diski iliyonse ndipo diskiyo imatseka yokha pamene kayendedwe ka mafakitale kakusintha. Kuyesera kwawonetsa kuti izi zapangitsa kuti moyo wa ma valve ukhale wokwera ndi 25% komanso kuchepa kwa nyundo yamadzi ndi 50%.
Gawo lililonse la double disc lili ndi ma springi ake omwe amapereka mphamvu yodziyimira payokha yotseka ndipo amakumana ndi angular offset yaying'ono ya 140° (chithunzi 3) m'malo mwa 350° ya classical spring yokhala ndi ma brackets awiri.
3. Kapangidwe koyimitsa ma disc odziyimira pawokha
Kapangidwe ka hinge yodziyimira payokha kamachepetsa kukangana ndi 66%, zomwe zimapangitsa kuti valavu igwire bwino ntchito. Chogwirira chothandizira chimayikidwa kuchokera ku hinge yakunja kuti hinge yapamwamba ikhale yothandizidwa payokha ndi chigwiriro chapansi panthawi yogwira ntchito ya valavu. Izi zimathandiza kuti ma disc onse awiri achitepo kanthu mwachangu komanso kutseka nthawi imodzi, zomwe zimapangitsa kuti pakhale magwiridwe antchito abwino kwambiri.
Chachinayi, njira yolumikizirana ndi payipi
Ma valve awiri oyesera mbale zophikidwandipo mapaipi amatha kulumikizidwa ndi ma clamp, ma lugs, ma flanges, ndi ma clamp.
Mutha kudina patsamba lathu kuti mudziwe zambiriValavu ya Gulugufe, Yoyendetsedwa ndi Valavu ya TWS (tws-valve.com)
Nthawi yotumizira: Okutobala-24-2024
