Ukugqwala kwe-Electrochemical corrosion kugqwala izinsimbi ngezindlela ezahlukahlukene.Ayisebenzi nje kuphela phakathi kwezinsimbi ezimbili, kodwa futhi ikhiqiza umehluko ongase ube khona ngenxa yokungancibiliki kahle kwesixazululo, ukungancibiliki kahle komoya-mpilo, kanye nomehluko omncane esakhiweni sangaphakathi sensimbi, okwenza kube kubi ukugqwala..Ezinye izinsimbi ngokwazo azikwazi ukumelana nokugqwala, kodwa zingakhiqiza ifilimu yokuzivikela enhle kakhulu ngemva kokugqwala, okungukuthi, ifilimu ye-passivation, engavimbela ukugqwala kwendawo.Kungabonakala ukuthi ukuze kufezwe injongo yokulwa nokugqwala kwama-valve ensimbi, omunye ukuqeda ukugqwala kwe-electrochemical;enye iwukuqeda ukugqwala kwe-electrochemical;ifilimu ye-passive kumele yakhelwe phezu kwensimbi;okwesithathu ukusebenzisa izinto ezingezona ezensimbi ngaphandle kokugqwala kwe-electrochemical esikhundleni sezinto zensimbi.Izindlela ezimbalwa zokulwa nokugqwala zichazwe ngezansi.
1. Khetha izinto ezimelana nokugqwala ngokuya ngendlela
Esigabeni esithi "I-Valve Selection", sethule indlela efanelekile yezinto ezivamile ze-valve, kodwa isingeniso esijwayelekile kuphela.Ekukhiqizweni kwangempela, ukugqwala kwe-medium kuyinkimbinkimbi kakhulu, noma ngabe isetshenziswa endaweni ephakathi Izinto ze-valve ziyafana, ukugxila, izinga lokushisa kanye nokucindezela kwe-medium kuhlukile, futhi ukugqwala kwe-medium kuya kwempahla kuyefana. futhi ezahlukene.Lapho izinga lokushisa eliphakathi likhuphuka ngo-10°C, izinga lokugqwala likhuphuka cishe izikhathi ezi-1 kuye kwezingu-3.Ukugxila okuphakathi kunethonya elikhulu ekugqwaleni kwezinto ze-valve.Isibonelo, lapho umthofu use-sulfuric acid ene-concentration encane, ukugqwala kuncane kakhulu.Lapho ukugxila kudlula ama-96%, ukugqwala kukhuphuka kakhulu.Ngokuphambene nalokho, i-carbon steel inokugqwala okubi kakhulu lapho ukugcwala kwe-sulfuric acid cishe ku-50%, futhi lapho ukugxila kukhula kube ngaphezu kuka-6%, ukugqwala kwehla kakhulu.Isibonelo, i-aluminiyamu igqwala kakhulu ku-nitric acid egxilile ene-concentration engaphezu kuka-80%, kodwa igqwalile kakhulu ekugxilweni okuphakathi nokuphansi kwe-nitric acid.Nakuba insimbi engagqwali inokumelana nokugqwala okuqinile ukuze inciphise i-nitric acid, ukugqwala kubhebhetheka ku-asidi ye-nitric egxilile engaphezu kuka-95%.
Kungabonakala ezibonelweni ezingenhla ukuthi ukukhethwa okufanele kwezinto ze-valve kufanele kusekelwe ezimweni ezithile, kuhlaziye izici ezihlukahlukene ezithinta ukugqwala, futhi ukhethe izinto ezisetshenziswayo ngokuhambisana nezincwadi ezifanele zokulwa nokugqwala.
2.Ukusebenzisa izinto ezingezona ezensimbi
Ukumelana nokugqwala okungeyona insimbi kuhle kakhulu.Uma nje izinga lokushisa lokusebenza kwe-valve nokucindezela kuhlangabezana nezidingo zezinto ezingezona ezensimbi, akukwazi nje ukuxazulula inkinga yokugqwala, kodwa futhi kusindisa izinsimbi eziyigugu.Umzimba wevalvu, ibhonethi, ulwelwesi, indawo yokuvala, njll. kuvame ukwenziwa ngezinto ezingezona ezensimbi.Ngokuqondene nama-gaskets, ukupakishwa kwenziwa ikakhulukazi ngezinto ezingezona ezensimbi.I-valve yakhiwe ngamapulasitiki afana ne-polytetrafluoroethylene kanye ne-chlorinated polyether, kanye nerabha efana nerabha yemvelo, i-neoprene nerabha ye-nitrile, kuyilapho umzimba we-valve kanye nesembozo se-valve ngokuvamile kwenziwa ngensimbi ekhonjiwe ne-carbon steel.Ayiqinisekisi kuphela amandla e-valve, kodwa futhi iqinisekisa ukuthi i-valve ayigqwali.I-valve yokuncinza nayo iklanyelwe ngokusekelwe ekumelaneni nokugqwala okuhle kakhulu nokusebenza okuhle kakhulu okuguquguqukayo kwerabha.Namuhla, sekulungile nakakhulu ukusebenzisa inayiloni, i-PTFE namanye amapulasitiki, nerabha yemvelo kanye nerabha yokwenziwa ukwenza izindawo ezihlukahlukene zokuvala namasongo okuvala, asetshenziswa ezinhlotsheni ezahlukene zamavalvu.Lezi zinto ezingezona ezensimbi ezisetshenziswa njengezindawo zokubeka uphawu Izinto, hhayi nje ukumelana nokugqwala okuhle, kodwa futhi nokusebenza kahle kokuvala uphawu, okulungele ukusetshenziswa emithonjeni yezindaba enezinhlayiya.Yiqiniso, amandla abo nokumelana nokushisa kuphansi, kukhawulela ububanzi bezinhlelo zokusebenza.Ukuvela kwe-graphite eguquguqukayo kulethe okungezona izinsimbi ensimini yokushisa okuphezulu, kuxazulule ubunzima besikhathi eside ukuxazulula inkinga yokupakisha nokuvuza kwe-gasket, futhi iyi-lubricant enhle yokushisa okuphezulu.
3. Futha upende
Ukumboza kuyindlela esetshenziswa kakhulu yokunqanda ukugqwala, futhi kuyimpahla enqanda ukugqwala kanye nophawu lokuhlonza emikhiqizweni yamavalvu.Izembatho nazo ziyizinto ezingezona ezensimbi.Ngokuvamile zenziwe nge-synthetic resin, i-rubber slurry, uwoyela wemifino, i-solvent, njll., futhi zimboza indawo yensimbi ukuze zihlukanise okuphakathi nendawo ukuze kuzuzwe izinhloso zokulwa nokugqwala.Izembatho zisetshenziswa kakhulu ezindaweni ezingagqwali kakhulu, njengamanzi, amanzi anosawoti, amanzi olwandle, kanye nomkhathi.Umgodi ongaphakathi wevalvu uvame ukupendwa ngopende ovimbela ukugqwala ukuze kuvinjwe amanzi, umoya kanye neminye imidiya ukuthi ingagqwali i-valve.Upende uxutshwe nemibala ehlukene ukumela izinto ezisetshenziswa uFahn.I-valve ifafazwa ngopende, ngokuvamile kanye njalo ezinyangeni eziyisithupha kuya onyakeni owodwa.
4. Engeza i-corrosion inhibitor
Ukwengeza inani elincane lezinye izinto ezikhethekile endaweni ebolayo kanye nezinto ezonakalisayo kunganciphisa kakhulu isivinini sokugqwala kwensimbi.Le nto ekhethekile ibizwa ngokuthi i-corrosion inhibitor.
Indlela i-corrosion inhibitor elawula ngayo ukugqwala ukuthi ikhuthaza ukuhlukaniswa kwebhethri.Ama-Corrosion inhibitors asetshenziswa kakhulu emithonjeni yezindaba kanye nama-filler.Ukwengeza i-corrosion inhibitor endaweni kunganciphisa ukugqwala kwemishini namavalvu.Isibonelo, insimbi engagqwali ye-chromium-nickel ku-oxygen-free sulfuric acid inohlu olubanzi lokuncibilika esimweni esishisiwe, futhi ukugqwala kubi kakhulu, kodwa inani elincane le-copper sulfate noma i-nitric acid liyengezwa.Uma i-oxidant isetshenziswa, insimbi engagqwali ingashintshwa ibe yisimo sokungenzi lutho, futhi ifilimu evikelayo yakheka ebusweni ukuvimbela ukugqwala kwe-medium.Ku-hydrochloric acid, uma inani elincane le-oxidant lingeziwe, ukugqwala kwe-titanium kungancishiswa.Amanzi avame ukusetshenziswa njengendawo yokuhlola ingcindezi yokuhlola umfutho we-valve, okulula ukubangela ukugqwala kwe-valve.Ukwengeza inani elincane le-sodium nitrite emanzini kungavimbela amanzi ukuthi angagqwali i-valve.Ukupakishwa kwe-asbestos kuqukethe ama-chloride, agqwalisa isiqu se-valve kakhulu.Uma indlela yokugeza ngamanzi a-distilled isetshenziswa, okuqukethwe kwe-chloride kungancishiswa.Nokho, le ndlela inzima ukuyisebenzisa futhi ayikwazi ukukhuthazwa ngokuvamile.I-ester ifanele izidingo ezikhethekile.
Ukuze kuvikelwe isiqu se-valve futhi kuvinjwe ukugqwala kokupakishwa kwe-asbestos, isiqu se-valve sigcwaliswa nge-corrosion inhibitor kanye nensimbi yomhlatshelo ekupakisheni kwe-asbestos.I-corrosion inhibitor yenziwe nge-sodium nitrite ne-sodium chromate, engakha ifilimu ye-passivation ebusweni besiqu se-valve ukuze kuthuthukiswe ukumelana nokubola kwesiqu se-valve;i-solvent ingancibilikisa kancane kancane i-corrosion inhibitor futhi idlale indima yokugcoba;ku-asbestos Zinc powder yengezwa njengensimbi yomhlatshelo.Eqinisweni, i-zinc nayo iyi-corrosion inhibitor.Ingaqala ihlanganise ne-chloride ku-asbestos, ukuze ukuthintana phakathi kwe-chloride ne-valve stem metal kuncishiswe kakhulu, ukuze kufezwe injongo yokulwa nokubola.Uma i-corrosion inhibitor efana ne-red red ne-calcium lead acid yengezwa kupende, ukufutha phezu kwevalvu kungavimbela ukugqwala komkhathi.
5. Ukuvikelwa kwe-electrochemical
Kunezinhlobo ezimbili zokuvikelwa kwe-electrochemical: ukuvikelwa kwe-anodic nokuvikelwa kwe-cathodic.Okubizwa ngokuthi ukuvikelwa kwe-anodic ukusebenzisa insimbi evikelayo njenge-anode ukwethula i-current eqondile yangaphandle ukwandisa amandla e-anode endleleni enhle.Uma ikhuphuka ibe yinani elithile, ifilimu yokuzivikela eminyene yenziwa ebusweni be-anode yensimbi, okuyifilimu ye-passivation.Ukugqwala kwama-cathodes ensimbi kuncipha kakhulu.Ukuvikelwa kwe-anodic kulungele izinsimbi ezidlula kalula.Okubizwa ngokuthi ukuvikelwa kwe-cathodic kusho ukuthi insimbi evikelwe isetshenziswa njenge-cathode, futhi i-current eqondile isetshenziselwa ukunciphisa amandla ayo ohlangothini olubi.Uma ifinyelela inani elithile elingase libe khona, ijubane lamanje lokugqwala liyancishiswa futhi insimbi ivikelekile.Ngaphezu kwalokho, ukuvikelwa kwe-cathodic kungavikela insimbi evikelwe ngensimbi amandla ayo e-electrode engemihle kakhulu kunensimbi evikelwe.Uma i-zinc isetshenziselwa ukuvikela insimbi, i-zinc iyagqwala, futhi i-zinc ibizwa ngokuthi insimbi yomhlatshelo.Ekukhiqizeni, ukuvikelwa kwe-anodic kusetshenziswa kancane, futhi ukuvikelwa kwe-cathodic kusetshenziswa kakhulu.Ama-valve amakhulu nama-valve abalulekile asebenzisa le ndlela yokuvikela i-cathodic, okuyindlela yokonga, elula futhi ephumelelayo.I-Zinc yengezwa ku-asbestos filler ukuvikela isiqu se-valve, nayo eyingxenye yendlela yokuvikela i-cathodic.
6. Ukwelashwa kwendawo yensimbi
Izinqubo zokwelashwa kwe-Metal surface zingcono kunokwemboza okuthule, ukungena kwendawo, i-surface oxidation passivation, njll. Inhloso yakho ukuthuthukisa ukumelana nokugqwala kwezinsimbi kanye nokwenza ngcono amandla emishini ezinsimbi.Ama-valve aphethwe phezulu asetshenziswa kakhulu.
Isikulufu sokuxhuma i-valve sivamise ukwenziwa i-galvanized, i-chrome-plated, futhi yenziwe nge-oxidized (blued) ukuze kuthuthukiswe ukumelana nokugqwala komkhathi nokuphakathi.Ngaphezu kwalezi zindlela ezibalulwe ngenhla zezinye izinsimbi, ukwelashwa okungaphezulu okufana ne-phosphating nakho kuyasetshenziswa ngokuya ngesimo.
Indawo yokuvala kanye nezingxenye ezivalayo ezinezinga elincane ngokuvamile zisebenzisa izinqubo zangaphezulu ezifana ne-nitriding ne-boronizing ukuze kuthuthukiswe ukumelana nokugqwala nokumelana nokuguga.I-valve disc eyenziwe nge-38CrMoAlA, isendlalelo se-nitrided sikhulu noma silingana no-0.4mm.
Inkinga ye-valve stem anti-corrosion iyinkinga abantu abayinaka.Siqoqe ulwazi lokukhiqiza olucebile.Izinqubo zokwelapha ezingaphezulu njenge-nitriding, i-boronizing, i-chrome plating kanye ne-nickel plating zivame ukusetshenziselwa ukuthuthukisa ukumelana nokugqwala, ukumelana nokugqwala kanye nokungaqhumeki.ukusebenza kokulimala.Izindlela zokwelapha ezihlukene kufanele zifanele izinto ezihlukene ze-valve stem kanye nezindawo zokusebenza.Isiqu se-valve sithintana nomkhathi, umhwamuko wamanzi ophakathi nendawo kanye nokupakishwa kwe-asbestos kungafakwa nge-chrome eqinile kanye nenqubo ye-nitriding yegesi (insimbi engagqwali ayifanele inqubo ye-ion nitriding);Emkhathini we-hydrogen sulfide, i-valve ifakwe i-electroplated high phosphorus nickel coating, enokusebenza okungcono kokuvikela;I-38CrMoAlA futhi ingamelana nokugqwala nge-ion negesi nitriding, kodwa ayifaneleki ukusebenzisa i-chromium eqinile;I-2Cr13 ingamelana nokugqwala kwe-ammonia ngemva kokucisha kanye nokushisa.Insimbi ye-carbon esebenzisa i-nitriding yegesi nayo imelana nokugqwala kwe-ammonia, kuyilapho zonke izimbotshana ze-phosphorus-nickel zingamelani nokugqwala kwe-ammonia;ngemuva kwe-nitriding yegesi, impahla engu-38CrMoAlA inokumelana nokugqwala okuhle kakhulu nokusebenza okuphelele, futhi isetshenziselwa iziqu zamavalvu eziningi.
Imizimba yama-valve enobubanzi obuncane kanye namasondo esandla nakho kuvame ukugqitshwa nge-chrome ukuze kuthuthukiswe ukumelana nokugqwala nokuhlobisa ivalvu.
7. Ukufafaza okushisayo
Ukufafaza okushisayo kuwuhlobo lwebhulokhi yenqubo yokulungisa ama-coatings futhi sekube ngobunye bobuchwepheshe obusha bokuvikela indawo ebonakalayo.Kuyiphrojekthi kazwelonke yokukhuthaza ukhiye.Isebenzisa umthombo wokushisa womthamo omkhulu wamandla (ilangabi lokuvutha kwegesi, i-arc kagesi, i-plasma arc, ukushisa kukagesi, ukuqhuma kwegesi, njll.) ukushisisa nokuncibilikisa izinto zensimbi noma okungezona ezensimbi, bese zifafaza endaweni eyisisekelo eshaywe ngaphambili. ifomu le-atomization ukwenza i-spray coating., noma ukushisa indawo eyisisekelo ngesikhathi esifanayo, ukuze ukugqoka kuphinde kuncibilike ebusweni be-substrate, futhi inqubo yokuqinisa ubuso ye-spray welding layer yakhiwe.Izinsimbi eziningi nama-alloys azo, i-metal oxide ceramics, izinhlanganisela ze-cermet, nezinhlanganisela zensimbi eqinile zingambozwa kuma-substrates ensimbi noma angewona awensimbi ngendlela eyodwa noma ngaphezulu yokufutha okushisayo.
Ukufafaza okushisayo kungathuthukisa ukumelana nokugqwala kwendawo, ukumelana nokugqoka, ukumelana nokushisa okuphezulu nezinye izakhiwo, futhi kwandise impilo yayo yesevisi.I-Thermal spray coating enemisebenzi ekhethekile inezici ezikhethekile ezifana nokushisa ukushisa, ukufakwa kwegesi (noma ugesi ohlukile), ukubeka uphawu okugaya, ukuzigcoba ngokwakho, imisebe yokushisa, ukuvikela i-electromagnetic, njll.;izingxenye zingalungiswa ngokufafaza okushisayo.
8. Lawula indawo ezonakalisayo
Imvelo ebizwa ngokuthi inezinzwa ezimbili ezibanzi nezincane.Indawo ebanzi isho indawo ezungeze indawo yokufaka ama-valve kanye nendawo yayo yangaphakathi yokuhamba;indawo yomqondo ewumngcingo isho izimo ezizungeze indawo yokufaka i-valve.Izindawo eziningi azikwazi ukulawulwa futhi nezinqubo zokukhiqiza azikwazi ukushintshwa ngokuzenzakalelayo.Kuphela esimweni lapho kungeke kubangele umonakalo kumkhiqizo, inqubo, njll., indlela yokulawula imvelo ingasetshenziswa, njengamanzi e-boiler deoxidizing, ukulungisa inani le-pH ye-alkali yasekhaya enqubweni yokucwenga, njll. leli phuzu lokubuka, ukungezwa okukhulunywe ngenhla kwe-corrosion inhibitors, ukuvikelwa kwe-electrochemical, njll. nazo zilawulwa izindawo zokugqwala.
Umkhathi ugcwele uthuli, umhwamuko wamanzi kanye nentuthu, ikakhulukazi endaweni yokukhiqiza, njenge-halogen yentuthu, amagesi anobuthi kanye nempushana ekhishwa izinto zokusebenza, ezogqwalisa i-valve ngamazinga ahlukahlukene.Ama-opharetha kufanele ahlanze futhi ahlanze amavalvu njalo futhi afake uphethiloli njalo ngokwemithetho yezinqubo zokusebenza, okuyizinyathelo ezisebenzayo zokulawula ukugqwala kwemvelo.Isiqu se-valve sifakwe ngesembozo sokuzivikela, i-valve yomhlabathi ifakwe kahle emhlabathini, futhi indawo ye-valve ifafazwe ngopende, njll, okuyizo zonke izindlela zokuvimbela ukugqwala kwe-valve ekuqukethe izinto ezilimazayo.Amazinga okushisa aphakeme e-ambient kanye nokungcoliswa komoya, ikakhulukazi okokusebenza namavalvu ezindaweni ezivaliwe, kuzosheshisa ukugqwala kwawo.Amashabhu avuliwe noma izindlela zokungenisa umoya kanye nokupholisa kufanele zamukelwe ngangokunokwenzeka ukuze kwehliswe ukugqwala kwemvelo.
9. Thuthukisa ubuchwepheshe bokucubungula kanye nesakhiwo se-valve
Ukuvikelwa kokungagqwali kwe-valve kuyinkinga ecatshangelwa kusukela ekwakhiweni, umkhiqizo we-valve onomklamo ophusile wesakhiwo kanye nendlela yenqubo efanele.Akungabazeki ukuthi kunomphumela omuhle ekunciphiseni ukugqwala kwe-valve.
AMAVAVAVU OKUHLOLA ONGABUYIYO
1.Ibhonethi eboshiwe, kanye nohlobo lwegasket ye-flange ephakathi ingase ihluke ngokuya ngesigaba sokucindezela.
2.Idivayisi ye-Disc Stop ukuvimbela idiski ukuthi ingavulwa phezulu kakhulu, okubangela ukwehluleka ukuvalwa.
I-3.Iphinikhodi eqinile ifakwe ngokunembile futhi inikezwe amandla aphezulu ukuze kuqinisekiswe ukusebenza kokusebenza kanye nempilo yesevisi yama-valve.
4.Ingalo yerocker inikezwa amandla anele,Lapho ivalwa,Iba nenkululeko eyanele yokuvala phansi kwama-valve Disc.
5.I-Valve disc inikezwa amandla nokuqina okwanele, indawo evalekayo ye-Disc mhlawumbe eyakhelwe phezulu eshiselwe ngento eqinile noma ehuqwe ngezinto ezingezona ezensimbi eziphendula izicelo zabasebenzisi.
6.Large Usayizi Swing Check Valve ahlinzekwa Lifting Izindandatho for Hoisting.
AMAVAVAVU OKUZISWUNGULA OKUSUNGULA
1. Umzimba: Imizimba yensimbi eyi-RXVAL ihlinzeka ngokugeleza kokumelana okuphansi namandla aphelele nokusebenza.
2. Ikhava: Ikhava ivumela ukufinyelela ezingxenyeni zangaphakathi.
3. I-Gasket Yekhava: I-gasket yekhava yenza uphawu olungavuzi phakathi kwebhonethi nomzimba.
4. I-Seat Ring: Ukuqinisekisa ukuvala okuzinzile, indandatho yesihlalo iqondanisiwe futhi ifakwe uphawu ku-valve, bese kuba umhlabathi onembayo ukuze uhlale kahle.
5. I-Disc: I-disc ivumela ukugeleza kwe-uni-directional futhi inqande ukugeleza okubuyela emuva ngokuvalwa kwezinkinga.
6. Ingalo yokushwiba: Ingalo yokushwiba ivumela idiski ukuthi ivuleke futhi ivaleke.
7. & 8. I-Disc Nut & Pin: I-disc nut nephinikhodi kuvikela idiski engalweni yokushwiba.
9. Iphinikhodi yehinge: Iphinikhodi ihlinzeka ngendlela ezinzile ukuze ingalo eshwibayo isebenze.
10. Ipulaki: Ipulaki ivikela iphinikhodi engalweni ngaphakathi kwevalvu.
11. I-Plug Gasket: I-plug gasket idala isivalo esingavuzi phakathi kwepulaki nomzimba.
12 & 13. Izigqoko Zekhava Namantongomane: Izigxobo zekhava namantongomane kuvikela ibhonethi emzimbeni.
14. I-eyebolt: I-eyebolt isetshenziselwa ukusiza ekuphakamiseni i-valve
Qaphela: Amakilasi 150 & 300 asebenzisa iphinikhodi yehinge yangaphandle
IMVAVELI YESANGO LETHUSI FLANGE END
1) Ukumelana nokugeleza kuncane.Isiteshi esiphakathi ngaphakathi komzimba we-valve siqondile, i-medium igeleza ngendlela eqondile, futhi ukumelana nokugeleza kuncane.
2)Konga kakhulu ukusebenza uma uvula noma uvala.Uma kuqhathaniswa ne-valve yembulunga, ngoba kungakhathaliseki ukuthi ivuliwe noma ivaliwe, isiqondiso sokuhamba kwesango sibhekene nesiqondiso sokugeleza kwe-medium.
3) Ukuphakama kukhulu futhi isikhathi sokuvula nokuvala side.Ukuvula nokuvalwa kwesango kukhulu, futhi ukuphakamisa nokwehlisa kwenziwa ngesikulufu.
I-4) Isimo sesando samanzi akulula ukwenzeka.Isizathu yisikhathi eside sokuvala.
5) I-medium ingageleza kunoma iyiphi indlela nhlangothi zombili, okulula ukuyifaka.Ishaneli ye-valve yesango i-symmetrical nhlangothi zombili.
Isikhathi sokuthumela: Aug-23-2022