1. Kusanthula kwamapangidwe
(1) Izivalavu ya butterflyali ndi mawonekedwe ozungulira ngati keke, mkati mwake amalumikizidwa ndikuthandizidwa ndi nthiti 8 zolimbitsa, dzenje lapamwamba la Φ620 limalumikizana ndi khomo lamkati, ndi zina zonse.valavuchatsekedwa, pachimake mchenga n'zovuta kukonza ndi zosavuta deform. Zonse ziwiri zotulutsa utsi ndi kuyeretsa m'kati mwake zimabweretsa zovuta, monga momwe tawonetsera pa Chithunzi 1.
Makulidwe a khoma la ma castings amasiyana kwambiri, makulidwe a khoma amafika 380mm, ndipo makulidwe ocheperako ndi 36mm okha. Pamene kuponyerako kuli kolimba, kusiyana kwa kutentha kumakhala kwakukulu, ndipo shrinkage yosagwirizana imatha kupanga mosavuta zibowo za shrinkage ndi shrinkage porosity defects, zomwe zidzachititsa kuti madzi ayambe kuyesedwa mu hydraulic test.
2. Kapangidwe kake:
(1) Malo olekanitsa akuwonetsedwa mu Chithunzi 1. Ikani mapeto ndi mabowo pabokosi lakumtunda, pangani mchenga wonse pakati pakatikati, ndikutalikitsa mutu wapakati moyenera kuti muzitha kumangirira pachimake cha mchenga ndi kuyenda kwa mchenga. pachimake mchenga pamene bokosi latembenuzidwa. Chokhazikika, kutalika kwa mutu wa cantilever pachimake cha mabowo awiri akhungu kumbali ndi yayitali kuposa kutalika kwa dzenje, kotero kuti mphamvu yokoka ya pachimake cha mchenga imakondera kumbali ya mutu wapakati kuonetsetsa kuti phata la mchenga ndilokhazikika komanso lokhazikika.
Dongosolo lothira lotsekeka limakhazikitsidwa, ∑F mkati: ∑F yopingasa: ∑F yowongoka = 1:1.5:1.3, sprue amagwiritsa ntchito chubu cha ceramic mkati mwake cha Φ120, ndi zidutswa ziwiri za 200×100×40mm refractory. njerwa zimayikidwa pansi kuti chitsulo chosungunula chisachoke mwachindunji Pa nkhungu ya mchenga, 150 × 150 × 40 foam ceramic fyuluta imayikidwa pansi pa wothamanga, ndi machubu 12 a ceramic okhala ndi mkati mwake Φ30 amagwiritsidwa ntchito. wothamanga wamkati kuti alumikizane mofanana mpaka pansi pa kuponyedwa kupyolera mu thanki yosonkhanitsa madzi pansi pa fyuluta kuti apange chiwembu chothira pansi, monga momwe tawonetsera pa Chithunzi 2 Essence.
(3) Ikani mabowo 14 ∮20 a mpweya pa nkhungu yakumtunda, ikani dzenje lolowera mchenga Φ200 pakati pa mutu wapakati, ikani chitsulo chozizira m'mbali zazikulu ndi zazikulu kuti zitsimikizire kulimba kokwanira kwa kuponyera, ndipo gwiritsani ntchito Mfundo yowonjezera ya graphitization kuletsa Chokwera chodyetsa chimagwiritsidwa ntchito kukonza zokolola. Kukula kwa bokosi mchenga ndi 3600 × 3600 × 1000/600mm, ndipo welded ndi 25mm wandiweyani mbale zitsulo kuonetsetsa mphamvu zokwanira ndi okhwima, monga momwe chithunzi 3.
3. Kuwongolera njira
(1) Kujambula: Musanayambe kupanga chitsanzo, gwiritsani ntchito chitsanzo cha Φ50 × 50mm kuti muyese mphamvu yopondereza ya mchenga wa resin ≥ 3.5MPa, ndikumangitsani chitsulo chozizira ndi wothamanga kuti muwonetsetse kuti nkhungu yamchenga ili ndi mphamvu zokwanira kuti muthe kuthetseratu graphite yopangidwa. pamene chitsulo chosungunula chimalimba Kukula kwa Chemical, ndikuletsa chitsulo chosungunuka kuti zisakhudze gawo lothamanga kwa nthawi yayitali kuti litsutse mchenga.
Kupanga koyambira: Pakatikati pa mchenga wagawidwa magawo 8 ofanana ndi nthiti 8 zolimbitsa, zomwe zimalumikizidwa kudzera pakatikati. Palibe mbali zina zothandizira ndi kutulutsa mpweya kupatula mutu wapakati wapakati. Ngati phata la mchenga silingakhazikike ndipo Utsi, kusuntha kwapakati pa mchenga ndi mabowo a mpweya zidzawonekera mutathira. Chifukwa dera lonse la phata la mchenga ndi lalikulu, limagawidwa m'magawo asanu ndi atatu. Iyenera kukhala ndi mphamvu zokwanira komanso zolimba kuti zitsimikizire kuti pachimake cha mchenga sichidzawonongeka pambuyo pa kumasulidwa kwa nkhungu, ndipo sichidzawonongeka pambuyo pa kuthira. Kupindika kumachitika, kuonetsetsa makulidwe a khoma la yunifolomu ya kuponyera. Pazifukwa izi, tidapanga fupa lapadera lapadera, ndikulimanga pachimake ndi chingwe chothandizira mpweya wabwino kuti tikoke mpweya wotuluka pamutu wapakatikati kuti titsimikizire kuti nkhungu yamchenga imagwirizana popanga pachimake. Monga momwe chithunzi 4 chikusonyezera.
(4) Bokosi lotsekera: Poganizira kuti ndizovuta kuyeretsa mchenga mkati mwa valavu ya butterfly, pachimake chamchenga chonsecho amapaka utoto wamitundu iwiri, wosanjikiza woyamba amapukutidwa ndi utoto wa zirconium wopangidwa ndi mowa (digiri ya Baume). 45-55), ndipo wosanjikiza woyamba amapakidwa utoto ndi kuwotchedwa. Mukatha kuyanika, pentani gawo lachiwiri ndi utoto wa magnesium wopangidwa ndi mowa (Baume degree 35-45) kuti muteteze kuponyedwa kuti zisamamatire pamchenga ndi sintering, zomwe sizingatsukidwe. Chigawo chapakati pamutu chimapachikidwa pa chitoliro chachitsulo cha Φ200 cha fupa lalikulu la fupa lapakati ndi zomangira zitatu za M25, zokhazikika ndi zokhoma ndi bokosi la mchenga la nkhungu lapamwamba ndi zipewa ndikuyang'ana ngati makulidwe a khoma la gawo lililonse ndi yunifolomu.
4. Njira yosungunuka ndi kuthira
(1) Gwiritsani ntchito Benxi low-P, S, Ti yapamwamba Q14 / 16 # nkhumba chitsulo, ndi kuwonjezera pa chiŵerengero cha 40% ~ 60%; kufufuza zinthu monga P, S, Ti, Cr, Pb, ndi zina zotero zimayendetsedwa mosamalitsa muzitsulo zowonongeka, ndipo palibe dzimbiri ndi mafuta omwe amaloledwa, chiŵerengero chowonjezera ndi 25% ~ 40%; malipiro obwezeredwa ayenera kutsukidwa ndi kuwomberedwa kuwombera musanagwiritse ntchito kuti zitsimikizire ukhondo wa mlanduwo.
(2) Main chigawo ulamuliro pambuyo ng'anjo: C: 3.5-3.65%, Si: 2.2% -2.45%, Mn: 0.25% -0.35%, P≤0.05%, S: ≤0.01%, Mg (zotsalira): 0.035% ~ 0.05%, pansi pamaziko owonetsetsa kuti spheroidization, malire apansi a Mg (otsalira) ayenera kutengedwa momwe angathere.
(3) Chithandizo cha spheroidization inoculation: otsika-magnesium ndi otsika-osowa-earth spheroidizers amagwiritsidwa ntchito, ndipo chiŵerengero chowonjezera ndi 1.0% ~ 1.2%. Ochiritsira flushing njira spheroidization mankhwala, 0,15% ya nthawi imodzi inoculation yokutidwa pa nodulizer pansi pa phukusi, ndi spheroidization anamaliza. The slag ndiye subcontracted kwa yachiwiri inoculation 0,35%, ndi otaya inoculation 0,15% ikuchitika pa kuthira.
(5) Njira yothira kutentha yotsika imatengedwa, kutentha kothira ndi 1320 ° C ~ 1340 ° C, ndipo nthawi yothira ndi 70 ~ 80s. Chitsulo chosungunuka sichikhoza kusokonezedwa panthawi yothira, ndipo chikho cha sprue nthawi zonse chimakhala chodzaza kuti chiteteze gasi ndi inclusions kuti asalowe mu nkhungu kupyolera mwa wothamanga. pakamwa.
5. Kuponya zotsatira za mayeso
(1) Yesani kulimba kwa chipika choyeserera: 485MPa, elongation: 15%, Brinell hardness HB187.
(2) Mlingo wa spheroidization ndi 95%, kukula kwa graphite ndi giredi 6, ndipo pearlite ndi 35%. Mapangidwe a metallographic akuwonetsedwa mu Chithunzi 5.
(3) Palibe zolakwika zojambulidwa zomwe zidapezeka mu UT ndi MT kuzindikira zolakwika za mbali zofunika.
(4) Maonekedwewo ndi athyathyathya komanso osalala (onani Chithunzi 6), popanda kuponyera zolakwika monga mchenga wa mchenga, slag inclusions, kutsekedwa kozizira, etc., makulidwe a khoma ndi yunifolomu, ndipo miyeso imakwaniritsa zofunikira za zojambulazo.
(6) 20kg / cm2 hydraulic pressure pressure test after processing sanawonetse kutayikira kulikonse
6. Mapeto
Malinga ndi structural makhalidwe a gulugufe valavu, vuto kusakhazikika ndi zosavuta mapindikidwe a pachimake mchenga lalikulu pakati ndi zovuta mchenga kuyeretsa kuthetsedwa ndi kutsindika pa kamangidwe ka ndondomeko ndondomeko, kupanga ndi kukonza pachimake mchenga ndi kugwiritsa ntchito zokutira zochokera ku zirconium. Kuyika kwa mabowo otuluka kumapewa kuthekera kwa pores mu castings. Kuchokera paulamuliro wa ng'anjo ndi makina othamanga, chophimba cha foam ceramic fyuluta ndi ukadaulo wa ceramic ingate amagwiritsidwa ntchito kuwonetsetsa kuyera kwachitsulo chosungunuka. Pambuyo mankhwala kangapo inoculation, kapangidwe metallographic wa castings ndi zosiyanasiyana Ntchito mabuku wafika muyezo zofunika makasitomala.
KuchokeraTianjin Tanggu Water-seal valve Co., Ltd. Valve ya butterfly, valve pachipata, Y-strainer, valavu yowunikira mbale ziwirikupanga.
Nthawi yotumiza: Apr-29-2023
