Kuya kubakho iziphene nakweyiphi na isakhelo.Ubukho bezi ziphene buya kuzisa ingozi enkulu efihliweyo kumgangatho wangaphakathi wokuphosa.Ukulungiswa kwe-welding ukuphelisa ezi ziphene kwinkqubo yokuvelisa kwakhona kuya kuzisa umthwalo omkhulu kwinkqubo yokuvelisa..Ngokukodwa, njengoko i-valve i-shell-shell casting ephantsi koxinzelelo kunye nobushushu, ukudibanisa kwesakhiwo sayo sangaphakathi kubaluleke kakhulu.Ke ngoko, iziphene zangaphakathi zokuphosa ziba yinto ethatha isigqibo esichaphazela umgangatho wokuphosa.
Iziphene zangaphakathi ze-valve castings ikakhulu ziquka ii-pores, i-slag inclusions, i-shrinkage porosity kunye nokuqhekeka.
Apha izakwazisa enye yeziphene eziphambili---Ii-Pores kunye ne-shrinkage porosity
(1)Iimingxuma:
Iipores ziveliswa ngegesi, umphezulu womngxuma ugudileyo, kwaye uveliswa ngaphakathi okanye kufutshane nomgangatho wokuphosa, kwaye imilo ininzi isetyhula okanye i-oval.
Imithombo ephambili yerhasi eyenza iipores yile:
①Initrojeni kunye ne-hydrogen enyityilisiweyo kwisinyithi ziqulethwe kwisinyithi ngexesha lokuqina kokubunjwa, ukwenza isetyhula evaliweyo okanye udonga lwangaphakathi olune-oval luster pores.
②Ukufuma okanye izinto eziguquguqukayo kwizinto ezibonisa imodeli ziya kuba yigesi ngenxa yokufudumeza, ukwenza iipore kunye neendonga zangaphakathi ezimnyama.
③ Ngethuba lokuthululelwa kwesinyithi, ngenxa yokuhamba okungazinzanga, umoya ubandakanyeka ukwenza iipores.
Ukuthintela njani iziphene zePores:
①Ekunyibilikeni, sebenzisa intsimbi ekrwada encinci okanye engenamhlwa kangangoko kunokwenzeka, kwaye ubhake kwaye womise izixhobo kunye neleyidi.
②Intsimbi etyhidiweyo kufuneka ikhutshwe kwiqondo lobushushu eliphezulu kwaye igalelwe kwiqondo lobushushu eliphantsi, kwaye intsimbi etyhidiweyo kufuneka izole ngokufanelekileyo ukuze kube lula ukudada kwigesi.
③ Uyilo lwenkqubo yesikhuphukeli esigalelayo kufuneka sonyuse intloko yoxinzelelo lwentsimbi etyhidiweyo ukunqanda ukubandakanyeka kwerhasi, kwaye usete indlela yerhasi eyenziweyo yokukhupha okufanelekileyo.
④Izinto zokubumba kufuneka zilawule umxholo wamanzi kunye nokuveliswa kwegesi, ukwandisa ukungena komoya, kwaye isikhunta sesanti kunye nombindi wesanti kufuneka ubhakwe kwaye womiswe kangangoko kunokwenzeka.
(2)Umngxunya oshwabeneyo (ukhululekile):
Isetyhula edibeneyo okanye engapheliyo okanye i-cavity engaqhelekanga (i-cavity) ngaphakathi kwe-casting (ingakumbi kwi-joint eshushu), kunye nomgangatho wangaphakathi obunzima kunye nombala omnyama.Iinkozo zirhabaxa, ubukhulu becala zii-dendrites, kwaye ziqokelelana kwindawo enye okanye ezingaphezulu, kwaye ukuvuza kulula ukwenzeka ngexesha lovavanyo lwehydraulic.
Isizathu sokushwabana komngxuma (ukukhululeka):
umthamo uyancipha xa isinyithi siqina ukusuka kwimo engamanzi ukuya kwisimo esiqinileyo.I-shrinkage cavity ye-castings yensimbi ibangelwa ngokusisiseko kulawulo olungafanelekanga lwenkqubo yokuqinisa ngokulandelelanayo, enokuthi ibangelwe kukunyuka okungalunganga kokumisela, ukushisa okuphezulu kokugalela insimbi etyhidiweyo, kunye nokunciphisa isinyithi esikhulu.
Iindlela zokuthintela imingxunya ecuthekileyo (ikhulule):
①Yila ngokwesayensi inkqubo yokuphosa ukuze intsimbi etyhidiweyo iqine ngokulandelelana, kwaye inxalenye yokuqala eqinisiweyo kufuneka yongezwe ngentsimbi etyhidiweyo.
②Seta ngokufanelekileyo kwaye ngokufanelekileyo izinyusi, iinkxaso, kunye neentsimbi ezibandayo zangaphakathi nangaphandle zokuqinisekisa ukuqina okulandelelanayo.
③Xa ugalela intsimbi etyhidiweyo, ekugqibeleni ukugalela ukusuka phezulu kwesikhuphukeli kuyanceda ekuqinisekiseni ubushushu kunye nokondla kwentsimbi etyhidiweyo, kunye nokunciphisa ukuveliswa kwemingxuma eshwabeneyo.
④Ngokwesantya sokugalela, ukugalela ngesantya esisezantsi kuluncedo ngakumbi ekuqinisweni okulandelelanayo kunokugalela ngesantya esiphezulu.
⑤Amaqondo obushushu okugalela akufunekanga abe phezulu kakhulu.Intsimbi etyhidiweyo ikhutshwe kwiqondo lokushisa eliphezulu kwaye ithululelwe emva kwe-sedation, ehambelana nokunciphisa i-shrinkage cavities.
OKUNGABUYELI IVAVVU ZOKUHLOLA
Iivalve zokujonga ujingiziphakathi kwezona ntlobo zixhaphakileyo zeevalvu zokutshekisha kwaye zisetyenziswa rhoqo ukulawula ukuhamba okuphezulu okuthe tye.
Uxinzelelo lolwelo luvula idiski ukuvumela amanzi okanye igesi ukuba idlule.
Emva kokuyeka ukuhamba, i-disc ijika ibuyele kwindawo yayo evaliweyo, iphumle ngokubhekiselele kwisihlalo sevalve kwaye inqande ukubuyela ngasemva.
Uxinzelelo lwanoma yiyiphi i-back-flow iphinda isebenze ukuvala i-disc.
I-NICKEL ALUMINIUM IBHOLA IBHOLA IVALVE C95800 150LB FLANGED END
I-Flanged Ball Valves eyenziwe kwi-C95800 ye-Nickel Aluminium Bronze (NAB) yeendawo ezifuna kakhulu, ezilungele ukusetyenziswa kwamanzi olwandle.Iivalve ze-RXVAL zibonelela ngoluhlu olupheleleyo lweevalvu zebhola ezidadayo kunye ne-trunnion, ukusuka kwizicelo eziqhelekileyo ukuya kumaqondo obushushu aphezulu kunye noxinzelelo.Khetha imathiriyeli yomzimba wakho, ukuphelisa uqhagamshelo kunye nokulungisa iklasi yakho oyifunayo kunye nobukhulu okanye sinokukunceda ukhethe izinto ezifanelekileyo ngokusekwe kwiimeko zakho zenkqubo.
I-VALVE YE-GLOBE EYENZIWE IMICHUPHE/I-SCREWED 200WOG
Abathengi baneemfuno ezizodwa zeemveliso kwaye kufuneka banike le miyalelo ilandelayo kwikhontrakthi yoku-odola:
1.Umbala wokupeyinta
2.Umzobo oqinisekisiweyo ngophawu kunye nesitampu
I-3.Inkonzo ephakathi, ubushushu kunye noluhlu loxinzelelo
4.Imigangatho yokuhlola kunye nezinye iimfuno ezinjengokuhlolwa komntu wesithathu .
5.Xelela imfuneko yelogo ephoswe kwivalvu.
6.Xelela imfuneko malunga nelogo kwiLever.Okanye isampuli ileyibhile.
7.Xelela Ukuba unemfuno ekhethekileyo yephakheji.
Ukulungele ukufumanisa ngakumbi?Qalisa namhlanje!
Ixesha lokuposa: Aug-06-2022