Ob chav foob titanium ntsaws valve yog siv dav hauv kev lag luam tshuaj, kev lag luam marine, kev tiv thaiv ib puag ncig, tshuaj thiab lwm yam kev lag luam nrog nws zoo heev corrosion kuj thiab txhim khu kev qha sealing qauv. Txawm li cas los xij, nyob rau hauv ntev - cov txheej txheem ua haujlwm ntev, vim yog cov yam ntxwv ntawm kev tshaj tawm, kev ua haujlwm, qib kev saib xyuas thiab lwm yam, tseem yuav muaj ntau yam teeb meem. Kev nkag siab txog hom kev ua haujlwm tsis zoo thiab lawv cov laj thawj tuaj yeem txhim kho kev ntseeg siab thiab kev pabcuam lub neej ntawm cov khoom siv.
1.Sealing nto hnav tsis ua hauj lwm
Lub sealing nto yog qhov tseem ceeb ntawm lub ntsaws valve kom paub txog kev ua haujlwm ntawm kev kaw thiab sealing. Kev qhib ntau zaus, suav nrog cov khoom siv hauv nruab nrab, lossis tsis txaus lubrication tuaj yeem ua rau lub sealing nto hnav.
Main Manifestations:
Internal to tom qab kaw valve
Txo cov foob tshwj xeeb
Nce kev khiav hauj lwm torque.
Yog vim li cas:
Ntev ntev - lub sijhawm qhib thiab kaw haujlwm
Nruab nrab, xws li xuab zeb thiab siv lead ua, muaj abrasive impurities.
Tsis txaus abrasion tsis kam ntawm sealing khoom;
Kev tiv thaiv:
Tsis tu ncua xyuas qhov xwm txheej ntawm lub hau.
Khaws nws kom huv si.
Xaiv cov khoom sealing haum rau kev ua haujlwm.
2. Corrosion Failure
Titanium muaj kev tiv thaiv corrosion zoo heev, tab sis nws tseem tuaj yeem corrode nyob rau hauv qee qhov tshwj xeeb tshaj tawm lossis huab cua.
Hom Corrosion Hom
Crevice Corrosion
Nws tshwm sim nyob rau hauv ib qho chaw kaw, xws li qhov chaw sib cuag ntawm lub hau npog thiab flange kev sib txuas.
Qhov Corrosion
Corrosion pits tsim nyob rau hauv ib cheeb tsam uas muaj cov tshuaj chlorine ion heev.
Electrochemical corrosion
Galvanic corrosion kuj yuav tshwm sim thaum titanium los rau hauv kev sib cuag nrog lwm yam hlau.
Cov ntsiab lus tseem ceeb
Qhov chaw corrosion
Hauv zos perforation
Txo kev ua haujlwm sealing
Kev tiv thaiv
Zam kev sib xyaw cov khoom tsis tsim nyog.
Tswj qhov kub thiab txias thiab concentration
Kev tshuaj xyuas ib ntus ntawm cov khoom tseem ceeb
3. Ob chav txheej txheem tsis ua hauj lwm
Muab ob npaug rau sealing system feem ntau yog tsim los ntawm lub ntsiab foob thiab auxiliary foob. Kev ua txhaum yuav tshwm sim thaum lub caij sealing muaj hnub nyoog lossis tawg.
Cov ntsiab lus tseem ceeb
Ua rau sab nrauv to
Txo kev ua haujlwm sealing
Kev ntsuas siab ua tsis tiav
Yog vim li cas
Foob lub nplhaib aging
(a) Ntev- lub sijhawm ua haujlwm kub kub;
Tshuaj media corrosion
Kev teeb tsa tsis raug ua rau deformation.
Kev tiv thaiv
Hloov cov ntsaws ruaj ruaj tsis tu ncua.
Tswj kev khiav hauj lwm kub
Xaiv cov khoom siv xov xwm zoo tiv thaiv sealing.
4. Plug Valve Jamming tsis ua haujlwm
Plug li qub yog qhib thiab kaw los ntawm kev sib hloov. Yog tias muaj qhov thaiv ntawm lub ntsaws thiab lub valve lub cev, kev ua haujlwm ib txwm yuav raug cuam tshuam.
Cov ntsiab lus tseem ceeb
Hloov nyuaj
Nce kev khiav hauj lwm torque ho.
Tsis tuaj yeem qhib lossis kaw tag nrho
Yog vim li cas
Ntev - tsis ua haujlwm ntev
Crystallization thiab deposition ntawm media
Tsis muaj lubrication
Thermal expansion ua rau dhau- zawm;
Kev tiv thaiv
Qhib thiab kaw li qub tsis tu ncua
Tswj lub cev lubrication ib txwm
Tshem tawm cov nplai thiab cov khib nyiab
5. Valve qia tsis ua hauj lwm
Lub qia ua lub luag haujlwm tseem ceeb hauv kev hloov pauv kev ua haujlwm torque thiab yog qhov tseem ceeb ntawm kev thauj khoom -cov kabmob ntawm lub valve.
Cov teeb meem
Kov dabtsi yog khoov
qia hnav
Valve qia breakage
Yog vim li cas
Kev ua haujlwm torque ntau dhau
Nquag rau thiab tawm
Corrosion thinning
Eccentric installation
Kev tiv thaiv
Zam kev quab yuam.
Periodically soj ntsuam valve qia hnav
Siv tus qauv tsim- ua raws cov actuators
6. Ntim ntim tsis ua haujlwm
Lub thawv ntim khoom yog lub luag haujlwm los tiv thaiv kev tawm xov xwm los ntawm lub valve qia.
Cov ntsiab lus tseem ceeb
valve qia xau
Kev kho ntau zaus ntawm cov kaus mom ntim khoom
Yog vim li cas
Kev laus ntim
Tsis txaus clamping quab yuam
Valve qia nto hnav
Kev tiv thaiv
Tsis tu ncua kho cov qog
Hloov cov ntim qub
Xyuas valve qia nto zoo.
