Ngokophenyo nokuhlaziya, ukugqwala kungenye yezinto ezibalulekile ezidala umonakalo kumavalve ovemvane.Ngenxa yokuthi umgodi ongaphakathi uxhumene nendawo, ugqwalile kakhulu.Ngemuva kokugqwala, ububanzi be-valve buba buncane futhi ukumelana nokugeleza kuyanda, okuthinta ukudluliswa kwe-medium.Ingaphezulu lomzimba we-valve lifakwa kakhulu phansi noma ngaphansi.Indawo engaphezulu ixhumene nomoya futhi umoya unomswakama, ngakho-ke ijwayele ukugqwala.Isihlalo se-valve simbozwe ngokuphelele lapho umgodi wangaphakathi uxhumene nendawo.Ngakho-ke, ukwelashwa kwe-surface coating yomzimba we-valve kanye nepuleti ye-valve kuyindlela yokuvikela engabizi kakhulu ngokumelene nokugqwala endaweni yangaphandle.
1. Indima ye-butterfly valve surface coating
01. Ukuhlonza impahla ye-valve yomzimba
Umbala wesendlalelo esingaphezulu usetshenziswa ezindaweni ezingenamshini womzimba we-valve kanye nebhonethi.Ngalesi sibonakaliso sombala, singakwazi ukunquma ngokushesha izinto ezibonakalayo ze-valve futhi siqonde kangcono izici zayo.
| I-Valve Body Material | Umbala Wopende | I-Valve Body Material | Umbala Wopende |
| Insimbi | Mnyama | I-Ductile Iron | Okuluhlaza okwesibhakabhaka |
| Insimbi Efojiwe | Mnyama | WCB | Okumpunga |
02. Umphumela wokuvikela
Ngemuva kokuthi ingaphezulu lomzimba we-valve limbozwe ngopende, ingaphezulu lomzimba we-valve lihlukanisiwe nemvelo.Lo mphumela wokuvikela ungabizwa ngokuthi umphumela wokuvikela.Kodwa-ke, kufanele kuphawulwe ukuthi ungqimba oluncane lwepende alukwazi ukunikeza umphumela wokuvikela ngokuphelele.Ngenxa yokuthi ama-polymers anezinga elithile lokuphefumula, lapho ukugqoka kuncane kakhulu, ama-pores esakhiwo avumela amanzi kanye nama-molecule e-oksijini ukuba adlule ngokukhululekile.Ama-valve avala uphawu oluthambile anezidingo eziqinile kugqinsi lwe-epoxy resin enamathela ngaphezulu.Ukuze kuthuthukiswe ukungakwazi ukugqwala kwe-coating, i-anti-corrosion coatings kufanele isebenzise izinto ezenza ifilimu ezinokungena komoya ophansi kanye nezigcwalisi eziqinile ezinezakhiwo ezivikelayo eziphezulu.Ngesikhathi esifanayo, inani lezendlalelo zokugqoka kufanele likhuliswe ukuze ukugqoka kufinyelele ubukhulu obuthile futhi kuminyene futhi kungeyona i-porous.
03.Ukuvimbela ukugqwala
Izingxenye zangaphakathi zopende zisabela ngensimbi ukuze zidlule indawo yensimbi noma zikhiqize izinto ezivikelayo ukuze kuthuthukiswe umphumela wokuvikela wento enamathelayo.Kuma-valve anezidingo ezikhethekile, kufanele unake ukwakheka kwepende ukuze ugweme imiphumela emibi kakhulu.Ngaphezu kwalokho, ama-valve ensimbi asetshenziswa emapayipini kawoyela nawo angasebenza njengama-organic corrosion inhibitors ngenxa yemikhiqizo ewohlokayo ekhiqizwa ngaphansi kokusebenza kwamanye amafutha kanye nokumiswa kwensipho yensimbi.
04. Ukuvikelwa kwe-electrochemical
Lapho i-dielectric penetrating coating ihlangana nendawo yensimbi, kuzokwakheka ukugqwala kwe-electrochemical ngaphansi kwefilimu.Izinsimbi ezinomsebenzi ophezulu kune-iron zisetshenziswa njengama-fillers e-coatings, njenge-zinc.Izodlala indima yokuvikela njenge-anode yomhlatshelo, futhi imikhiqizo yokugqwala ye-zinc i-zinc chloride esekelwe kusawoti kanye ne-zinc carbonate, ezovala izikhala zefilimu futhi yenze ifilimu iqine, yehlise kakhulu ukugqwala futhi yandise impilo yesevisi i-valve.
2. Izembatho ezivame ukusetshenziswa kuma-valve ensimbi
Izindlela zokwelapha ezingaphezulu zama-valve ngokuyinhloko zihlanganisa ukunamathela ngopende, ukugqugquzelwa kwe-galvanizing kanye ne-powder coating.Isikhathi sokuvikela sikapende sifushane futhi asikwazi ukusetshenziswa ngaphansi kwezimo zokusebenza isikhathi eside.Inqubo yokufaka i-galvanizing isetshenziswa kakhulu kumapayipi.Kokubili i-hot-dip galvanizing kanye ne-electro-galvanizing isetshenziswa.Inqubo iyinkimbinkimbi.I-pretreatment isebenzisa izinqubo zokuqoqa kanye ne-phosphating.Kuzoba khona izinsalela ze-asidi ne-alkali phezu kwendawo yokusebenza, okushiya ukugqwala Ingozi efihliwe yenza ungqimba oluthathiwe lube lula ukuwa.Ukumelana nokugqwala kwensimbi eyi-galvanized yiminyaka emi-3 kuya kwemi-5.I-powder coating esetshenziswa kumavalvu ethu e-Zhongfa inezici zokumboza okukhulu, ukumelana nokugqwala, ukumelana nokuguguleka, njll., okungahlangabezana nezidingo zamavalvu ngaphansi kwezimo zokusetshenziswa kohlelo lwamanzi.
01. I-valve body epoxy resin coating
Inezici ezilandelayo:
·Ukumelana nokugqwala: Imigoqo yensimbi ehlanganiswe ne-epoxy resin inokumelana nokugqwala okuhle, futhi amandla okubopha ngokhonkolo ancipha kakhulu.Zifanele izimo zezimboni ezindaweni ezinomswakama noma imidiya ebolayo.
·Ukunamathela okuqinile: Ukuba khona kwamaqembu e-polar hydroxyl namabhondi e-ether atholakala kuketango lamangqamuzana e-epoxy resin kuwenza anamathelane kakhulu ezintweni ezihlukahlukene.Ukuncipha kwe-epoxy resin uma uphulukisiwe kuphansi, ukucindezeleka kwangaphakathi okukhiqizwa kuncane, futhi ukumbozwa kwendawo yokuvikela akulula ukuwa nokuhluleka.
·Izakhiwo zikagesi: Uhlelo lwe-epoxy resin eselashiwe luyinto enhle kakhulu yokuvikela enezici eziphezulu ze-dielectric, ukumelana nokuvuza kwendawo, kanye nokumelana ne-arc.
·Ukumelana Nesikhunta: Isistimu ye-epoxy resin ephulukisiwe imelana nesikhunta esiningi futhi ingasetshenziswa ezimweni ezishisayo ezishisayo.
02. Impahla yepuleti ye-valve enayiloni
Amashidi enayiloni amelana kakhulu nokugqwala futhi asetshenziswe ngempumelelo ezintweni eziningi ezifana namanzi, udaka, ukudla kanye nokukhipha usawoti emanzini olwandle.
·Ukusebenza kwangaphandle: Ipuleti lenayiloni elinamathelayo lingaphumelela ukuhlolwa kwesifutho sikasawoti.Ayikaze ixebuke ngemva kokucwiliswa emanzini olwandle iminyaka engaphezu kwengu-25, ngakho akukho ukugqwala ezingxenyeni zensimbi.
·Ukumelana nokugqoka: Ukungagugi kahle kakhulu.
·Ukumelana nomthelela: Azikho izimpawu zokuxebuka ngaphansi komthelela oqinile.
3. Inqubo yokufafaza
Inqubo yokufafaza iwukulungiselwa kusengaphambili kwe-workpiece → ukususwa kothuli → ukushisa kuqala → ukufafaza (i-primer - trimming - topcoat) → ukuqiniswa → ukupholisa.
Ukufafaza Ukufafaza kusebenzisa isifutho se-electrostatic.Ngokusho kobukhulu be-workpiece, ukufafaza kwe-electrostatic kungahlukaniswa kube yimpushana yokukhiqiza i-electrostatic spraying kanye neyunithi yokufafaza i-electrostatic.Lezi zinqubo ezimbili ziyefana, futhi umehluko omkhulu yindlela yokwenza inzuzo ye-workpiece.Ulayini wokukhiqiza isifutho usebenzisa iketango lokudlulisela ukudlulisa okuzenzakalelayo, kuyilapho iyunithi yesifutho iphakanyiswa mathupha.Ubukhulu be-coating kulawulwa ku-250-300.Uma ubukhulu bungaphansi kuka-150 μm, ukusebenza kokuvikela kuzoncishiswa.Uma ubukhulu bungaphezu kuka-500 μm, ukunamathela kokugqoka kuzokwehla, ukumelana nomthelela kuzokwehla, futhi ukusetshenziswa kwe-powder kuzokwanda.