Ua rau Valve Failure Thiab Kho
Feb 23, 2022
Cov dej ntws tawm ntawm kev ntim khoom
Ua rau tsis ua hauj lwm
● Cov muab tub lim tsis raug xaiv kom raug, uas tsis sib haum nrog corrosivity, kub thiab siab ntawm qhov nruab nrab ua haujlwm.
● yog tias cov ntim khoom tsis raug teeb tsa kom raug, tshwj xeeb tshaj yog tias tag nrho cov ntim tau muab ntsia rau hauv qhov chaw tos txais, nws feem ntau yuav ua rau kom tawg.
● cov muab tub lim tau tshaj nws lub neej kev pab, laus thiab poob elasticity.
● Muaj pes tsawg lub nplhaib ntim khoom tsis txaus.
● qhov ua tiav qhov tseeb lossis qhov ua tiav ntawm lub valve qia tsis txaus, lossis muaj ovality lossis qhab nia.
● Kev ua haujlwm tsis raug thiab muaj zog ntau dhau.
Txoj kev tu
● cov khoom thiab hom muab tub lim yuav tsum raug xaiv raws li kev ua haujlwm.
● packing yuav tsum muab tso thiab nias ib qho los ntawm ib qho, thiab qhov sib koom ua ke yuav tsum yog 30 degree lossis 45 degree.
● Kev laus thiab cov khoom puas yuav raug hloov raws sij hawm.
● cov packing yuav tsum tau muab ntsia raws li tus naj npawb ntawm lem.
● saib xyuas cov txheej txheem kev khiav hauj lwm thiab ua haujlwm nrog qhov ceev thiab lub zog ib txwm, tshwj tsis yog rau qhov cuam tshuam ntawm tes.
● lub caj pas bolts yuav tsum tau nruj tusyees thiab symmetrically.
Leakage ntawm gasket
vim li cas
● lub gasket tsis tiv taus corrosion, siab siab, nqus tsev vacuum, kub kub los yog kub tsawg.
● kev ua haujlwm tsis ruaj khov ua rau muaj kev hloov pauv ntawm lub valve siab thiab kub.
● lub zog nias ntawm lub gasket tsis txaus.
● lub gasket yog sib dhos tsis raug thiab qhov kev ntxhov siab tsis sib xws.
● lub gasket nto yog ntxhib thiab tov nrog txawv teb chaws teeb meem.
Txoj kev tu
● cov ntaub ntawv gasket yuav tsum raug xaiv raws li kev ua haujlwm.
● ceev faj hloov thiab ua haujlwm du.
● bolts yuav tsum nruj sib npaug thiab sib npaug.
● Lub rooj sib dhos gasket yuav tsum nruj sib npaug, thiab lub gasket tsis pub sib tshooj lossis siv ob lub gasket.
● xyuam xim rau kev tu thaum txhim kho gaskets, thiab ntxuav lub sealing nto nrog kerosene.
Leakage ntawm sealing nto
vim li cas
● lub sealing nto yuav tsum tsis txhob raug grinded unevenly tsim ib tug sealing kab.
● Sab saum toj nruab nrab ntawm kev sib txuas ntawm lub valve qia thiab qhov kaw yog raug tshem tawm, tsis raug lossis hnav.
● lub valve qws yog khoov los yog ua tsis tau zoo, uas skews qhov kaw.
● Kev xaiv tsis raug ntawm sealing nto cov ntaub ntawv, ua rau corrosion, yaig thiab hnav ntawm sealing nto.
● cov surfacing thiab kev kho cua sov tsis ua raws li cov kev cai, ua rau hnav, corrosion, tawg, thiab lwm yam.
● peeling ntawm sealing nto.
Txoj kev tu
● thaum sib tsoo lub sealing nto, cov cuab yeej sib tsoo thiab cov abrasives yuav tsum raug xaiv kom tsim nyog. Tom qab kev sib tsoo, kev tshuaj xyuas cov xim yuav tsum tau ua, thiab lub sealing nto yuav tsum tsis muaj indentation, tawg, khawb thiab lwm yam tsis xws luag.
● yog tias qhov chaw saum toj kawg nkaus ntawm qhov sib txuas ntawm lub qia valve thiab qhov kaw qhov tsis ua raws li qhov yuav tsum tau ua, nws yuav tsum tau kho. Qhov nruab nrab sab saum toj yuav tsum muaj qee qhov txav tau yooj yim, thiab axial clearance ntawm lub valve qia xub pwg thiab qhov kaw yuav tsum tsis pub tsawg tshaj 2 hli.
● straighten thiab khoov lub valve qia, thiab kho lub valve qia, valve qia txiv ntoo, kaw ib feem thiab valve lub rooj zaum ntawm ib qho axis.
● xaiv lub sealing nto nrog corrosion kuj, khawb kuj thiab lwm yam khoom uas ua tau raws li cov kev ua haujlwm.
● lub valve kub kub yuav txo qis tom qab kaw, thiab yuav muaj cov kab nrib pleb zoo. Nws yuav raug kaw dua nyob rau ib ntus tom qab raug kaw.
● Cov li qub uas siv los ua cov khoom kaw tsis raug tso cai siv los ua lub valve thiab lub siab txo li qub. Cov khoom kaw yuav tsum nyob rau hauv qhov qhib siab lossis kaw tag nrho. Yog tias tsim nyog los kho qhov nruab nrab ntws thiab siab, lub tshuab nqus tsev valve thiab lub siab txo qhov yuav tsum tau muab cais tawm.
● lub sealing nto uas hloov tsis tau yuav tsum tau hloov raws sij hawm.
Qhov kaw qhov poob tawm
vim li cas
● qhov chaw kaw yog daig lossis dhau ntawm qhov chaw tuag saum toj kawg nkaus vim kev ua haujlwm tsis zoo, thiab kev sib txuas yog puas thiab tawg.
● Kev sib txuas ntawm qhov kaw tsis ruaj, xoob thiab poob.
● Cov khoom siv ntawm cov khoom sib txuas uas tau xaiv tsis raug thiab tsis tuaj yeem tiv taus corrosion ntawm nruab nrab thiab siv tshuab.
Txoj kev tu
● ua haujlwm kom raug. Tsis txhob siv lub zog ntau dhau los kaw lub valve, thiab tsis txhob qhib lub valve tshaj qhov chaw tuag saum toj kawg nkaus. Tom qab lub valve qhib tag nrho, lub handwheel yuav tsum tau thim rov qab me ntsis.
● Kev sib txuas ntawm qhov kaw thiab lub valve pas nrig yuav tsum raug thiab ruaj khov, thiab cov xov txuas yuav tsum muaj qhov tsis rov qab los.
● cov fasteners siv rau kev sib txuas ntawm qhov kaw thiab lub valve pas nrig yuav tsum tiv taus corrosion ntawm qhov nruab nrab thiab muaj qee yam khoom siv zog thiab hnav tsis kam. Txawm hais tias qhov poob ntawm qhov kaw yog qhov tsawg, nws yog qhov ua txhaum loj heev.
Inflexible valve qia
vim li cas
● kev ua tiav qhov tseeb ntawm qhov sib txuam ntawm lub qia valve thiab nws yog qhov tsawg, thiab qhov sib txuam clearance tsawg dhau.
● cov axes ntawm valve qia, valve qia txiv ntoo, kev txhawb nqa, caj pas, ntim, thiab lwm yam tsis nyob hauv txoj kab ncaj nraim.
● lub ntim yog nias nruj heev.
● lub qia valve yog khoov los yog puas.
● cov xov tsis huv los yog xeb, thiab cov txheej txheem lubrication tsis zoo.
● Cov txiv ntseej yog xoob thiab cov xov yog nplua.
● Kev sib txuas ntawm lub valve pas nrig thiab cov khoom siv kis tau tus mob yog xoob lossis puas.
Txoj kev tu
● txhim kho qhov tseeb machining thiab kho qhov zoo ntawm lub valve qws, valve qws txiv ntoo, thiab lwm yam, kom qhov kev tshem tawm yuav tsum tsim nyog.
● thaum sib dhos lub valve qia thiab nws cov connectors, qhov clearance yuav tsum zoo ib yam, concentric thiab saj zawg zog.
● Yog hais tias lub ntim yog nruj dhau, loosen lub caj pas kom zoo.
● khoov ntawm lub valve pas nrig yuav tsum raug kho. Yog tias nws nyuaj rau kho, nws yuav tsum hloov. Thaum ua haujlwm ntawm lub valve qia, qhov kaw quab yuam yog tsim nyog.
● cov xov ntawm valve pas nrig thiab lub valve qws txiv ntoo yuav tsum tau ntxuav thiab lubricated tsis tu ncua. Rau qhov kub-kub li qub, disulfide tus pin lossis graphite hmoov yuav tsum tau coated rau lubrication.
● yog tias lub valve qia txiv ntoo yog xoob, nws yuav tsum tau kho, thiab yog tias nws tsis tuaj yeem kho tau, nws yuav tsum tau hloov raws sijhawm.
● Ua kom cov roj hluav taws xob ntawm cov txiv ntoo tsis thaiv thiab lubricated zoo. Rau cov valve uas tsis ua haujlwm ntau zaus, xyuas thiab txav lub valve qia tsis tu ncua. Yog tias hnav thiab qaug dab peg, kho lub valve qia txiv ntoo, kev txhawb nqa thiab lwm yam khoom siv hauv lub sijhawm.
● lub valve yuav tsum tau ua kom raug thiab kaw lub zog yuav tsum tsim nyog kom tsis txhob deformation thiab puas rau lub valve qia.
● Thaum lub valve yog cua sov thiab nthuav dav tom qab lub valve kaw, tig lub tes log me ntsis counterclockwise ntawm ib lub caij nyoog tom qab lub valve raug kaw kom tiv thaiv lub valve qia ntawm jacking.
Cov dej ntws tawm ntawm lub cev valve thiab lub kaus mom
vim li cas
● lub valve lub cev muaj cov xuab zeb qhov los yog tawg.
● lub cev valve yog tawg thaum kho vuam.
Txoj kev tu
● polish qhov xav tias tawg thiab etch nws nrog 4 feem pua nitric acid tov. Yog tias muaj qhov tawg, nws tuaj yeem tshwm sim.
● kho lossis hloov cov kab nrib pleb.
