Vim li cas Industrial Valves Fail thiab Yuav Kho Li Cas

Saib cov duab loj dua
Industrial li qub tsis kav mus ib txhis.Lawv tsis tuaj pheej yig thiab.Feem ntau, kev kho pib hauv 3-5 xyoos ntawm kev siv.Txawm li cas los xij, kev nkag siab thiab paub txog cov laj thawj uas ua rau lub valve tsis ua haujlwm tuaj yeem ua rau lub neej ua haujlwm ntev.

Kab lus no muab cov ntaub ntawv qhia txog yuav kho li cas faulty, qhov tshwm sim vim li cas li qub xav tau kho thiab cov cim qhia tias cov valve twb faulty.

Dab tsi ua kom Valves kav ntev dua

Lub neej ntev ntawm lub valve nyob ntawm peb yam: qhov zoo ntawm lub foob, ib puag ncig sab hauv thiab sab nraud thiab qhov zaus ntawm kev ua haujlwm.

Yog tias lub foob ua haujlwm zoo kawg nkaus, lub valve ua haujlwm zoo ib yam.Xaiv lub foob raug cai ua kom muaj kev ua tau zoo thiab kev saib xyuas zoo dua.

Ntawm qhov tod tes, yam xws li siab, qhov kub thiab txias, nrog rau hom kev tshaj tawm yog tsim nyog xav txog.Thaum kawg, yog tias lub valve ua haujlwm txhua lub sijhawm, lub sijhawm saib xyuas yog nyob ib ncig ntawm 3 lub hlis kom ntseeg tau tias qhov zoo tshaj plaws.

Yuav Ua Li Cas Paub Nws Yog Lub Sijhawm Kho Valve

#1 Thaum muaj kev nkag mus hauv

Ib qho ntawm cov laj thawj vim li cas thiaj li muaj kev tawm hauv sab hauv yog tias lub valve tsis tuaj yeem kaw tag nrho.Raws li cov qauv thoob ntiaj teb, txhua hom valve muaj qhov siab tshaj plaws tso cai tso tawm (MAL).Daim ntawv qhia-taw qhia tias lub valve xav tau kev kho yog thaum qhov xau tshaj qhov xav tau rau MAL

#2 Thaum muaj kev tawm sab nraud

Muaj ob peb culpris ntawm yog vim li cas sab nraud leaking yog tam sim no.Hauv ntau qhov xwm txheej, tau muaj kev saib xyuas tsis raug.Nws kuj tseem ua tau tias cov khoom siv ntawm lub valve thiab cov xov xwm tsis sib xws.Qhov kub thiab txias kuj tuaj yeem ua rau sab nraud.

#3 Thaum lub valve ua nrov

Dej rauj yog lo lus siv hauv kev lag luam siv los piav txog lub suab ua los ntawm li qub.Qhov no yog qhov qhia tias lub valve xav tau kev saib xyuas.Lub disc banging lub rooj zaum valve ua rau lub suab nrov no.

#4 Thaum lub valve tsis ua haujlwm lawm

Obviously, thaum lub valve tsis ua hauj lwm lawm, nws lub sij hawm siab los cawm los yog kho nws.Txawm hais tias muaj ntau lub li qub tuaj yeem kho tau, muaj cov uas kho yuav luag tsis tuaj yeem.

Feem ntau ua rau Industrial Valve Failures

#1 Qhov Tsis Zoo Valve Loj

Kev xam qhov loj ntawm lub valve tsis raug tuaj yeem ua rau cov qis qis lossis qhov loj dua.Qhov no yog qhov tseem ceeb vim tias qhov ntws ntawm cov xov xwm nyob ntawm qhov loj ntawm lub valve.Ib qho loj loj tuaj yeem txo qhov siab thaum lub valve undersized tuaj yeem ua rau tsis muaj dab tsi.

Kev daws
Nrhiav ib qho online valve sizing lub laij lej.Muaj cov qauv sib txawv rau cov kua thiab cov roj.Yog tias kev suav phau ntawv yog qhov nyuaj dhau, ib qho online yuav cia li ua kom yuam kev.

Qhov no yuav ua rau nrhiav txoj cai valve yooj yim dua.Raws li qhov taw qhia ntawm kev siv, kuj saib tus nqi Kv pom hauv cov khoom piav qhia.Tsis tas li ntawd, xav txog qhov yuav tsum tau khiav tus nqi nrog rau lub siab poob ntau.

#2 Cov khoom tsis sib xws

Hom xov xwm, cov khoom siv lub rooj zaum thiab cov khoom siv ntawm lub valve lub cev yuav tsum sib phim.Incompatibility txhais tau hais tias lub valve yog feem ntau hnav thiab tsim kua muag.

Kev daws
Tshawb xyuas cov lus piav qhia ntawm cov khoom siv rau hom khoom siv rau lub rooj zaum valve thiab lub cev.Cov no yuav tsum ua raws li cov qauv kev lag luam raws li kev siv xov xwm dab tsi.Tsis tas li, tshawb xyuas qhov kev puas tsuaj valve yog tias koj xav tias muaj cov khoom siv tsis raug.Hloov lub valve yog kim.Hloov cov khoom uas muaj kev sib cuag nrog cov xov xwm mus rau ib yam dab tsi uas tuaj yeem tiv taus nws.

#3 Elastomer Kev puas tsuaj

Elastomers feem ntau yog siv los ua lub rooj zaum valve, gaskets lossis O-rings uas ua raws li lub foob.Vim tias lawv yog elastic, lawv yog cov kev xaiv ntuj rau kev sib khi daim ntaub ntawv.Qhov no tseem tiv thaiv kev sib cuag ntawm cov hlau valve lub cev nrog cov xov xwm.Piv txwv ntawm elastomers siv hauv kev lag luam muaj xws li nitrile, Aflas, thiab Teflon.

Elastomer hnav puas yog tshwm sim los ntawm lub ntuj txav ntawm cov kua.Feem ntau, qhov ua rau yuav yog qhov tsis sib xws ntawm elastomer thiab xov xwm.

Kev daws
Xav txog qhov compatibility ntawm elastomer thiab cov xov xwm.Txheeb xyuas cov lus piav qhia ntawm cov khoom siv li cas nrog cov elastomers.Thaum muas, xyuas cov lus piav qhia ntawm lub valve.Yog tias elastomer tsis sib xws, nrhiav lwm cov khoom sib khi uas haum rau elastomer.

Thaum lub elastomer foob muaj dents, kab nrib pleb thiab cov nyiam twb pom lawm, hloov cov khoom no.Tsis tas li ntawd, xyuas seb puas muaj cov qauv hnav uas ua raws li kev tshaj tawm, nws txhais tau tias tom kawg yog abrasive dhau lawm.

#4 Valve Stem Hnav

Cov khoom me me xws li lub pob valve qia los yog lub caj pas bolts ua rau hnav thiab tsim kua muag rau qia.Tsis tas li ntawd, qhov kev txav mus tas li ntawm lub valve disc, nrog rau kev sib cuag ntawm cov corrosive, kuj tseem ua rau kev hnav thiab tsim kua muag ntawm qia.

Rau cov qia packing, qhov tsis muaj elasticity uas ua rau lub sealing sib txawv ua rau hnav.Qhov no yog tshwj xeeb tshaj yog muaj tseeb nyob rau hauv cov ntaub ntawv ntawm kev sib xyaw ntawm inelastic packing khoom thiab caj pas bolts.

Kev daws
Rau cov me me li qub, tsuas yog kev daws teeb meem yog los hloov lawv tom qab tag nrho, lawv tau yooj yim muaj.Txawm li cas los xij, rau cov valve loj, kev hloov pauv tsis raug nqi.Qhov kev daws teeb meem zoo tshaj plaws yog txhawm rau txhim kho lub valve tam sim no.

Ua ntej kuaj lub qia, xyuas lwm yam me me ua ntej xws li lub caj pas studs, bolts thiab cov thawv ntim khoom.Cov kauj ruam tom ntej yog xyuas cov qia yog tias nws xav tau rov ua haujlwm lossis hloov pauv.

#5 Cavitation

Cavitation feem ntau tshwm sim nyob rau hauv kev tswj li qub nrog kua xov xwm.Ob yam uas ua rau cavitation yog kua tshaj tawm thiab siab poob.Cavitation tshwm sim thaum muaj kev hloov pauv hauv cov qib siab thiab qhov nrawm ntawm cov kua dej.

Cov npuas tsim thaum cov kua siab qis dua li qhov vapor siab hauv lub valve.Cov npuas no ua li cas nres qhov ntws ntawm kev tshaj tawm.Thaum cov kua siab rov qab los ntawm qhov poob qis, cov npuas tawg, ua rau muaj kev puas tsuaj rau lub valve.Koj tuaj yeem tshawb xyuas cov txheej txheem hauv video rau cavitation.

Kev daws
Nco ntsoov tias daim ntawv thov siv lub valve zoo.Yog hais tias nws yog ib tug tsis ncaj ncees lawm style los yog loj, muaj feem ntau ntawm cavitation.Siv cov tshuaj tiv thaiv kab mob rau cov dej thiab kua siv.Yog tias siv cov tswj valve, muab tso rau hauv qhov chaw uas lub valve muaj qhov qis qis hauv kev cuam tshuam rau cov kav dej.

#6 Dej Rauj

Dej rauj yog qhov xwm txheej uas muaj qhov nrawm nrawm hauv lub valve.Nws yog ib qho kev puas tsuaj loj tshaj plaws uas tuaj yeem ua rau muaj kev puas tsuaj rau lub cev valve.Peb yam tsim kom muaj dej rauj: ceev npaum li cas lub valve kaw, cov kua ceev npaum li cas thaum lub valve kaw thiab lub siab yoj ntawm cov yeeb nkab yog dab tsi.Koj tseem tuaj yeem tshawb xyuas daim vis dis aus no rau kev qhia ntxiv txog dej rauj.

Lwm yam tseem ceeb uas ua rau muaj qhov tshwm sim no yog lub thickness ntawm lub puab valve kab noj hniav, lub zog ntawm cov yeeb nkab thiab lub siab ntawm cov xov xwm.

Kev daws
Siv lub throttling valve kom txo cov dej rauj.Tsis tas li ntawd, siv lub nrawm nrawm rau / tawm valve xws li npauj npaim valve.Ib qho kev ua qeeb qeeb kuj yog qhov tsim nyog vim qhov no txo ​​cov dej rauj siab.Hloov chaw qhib thiab kaw lub valve, siv hydraulic actuator kom qhib thiab kaw kom nrawm dua.

#7 Siab thiab kub siab tshaj qhov yuav tsum tau ua

Valves muaj cov kev xav tau tshwj xeeb siab thiab kub.Mus dhau qhov uas lub valve tuaj yeem tiv taus tuaj yeem ua rau nws puas.

Kev daws
Ua ntej kev teeb tsa, xyuas cov khoom yuav tsum tau ua kom paub tseeb tias tsis muaj qhov kub thiab txias upsurge tshwm sim.Kev tu thiab kho txhua hnub yog qhov tseem ceeb.Hloov cov khoom puas vim qhov kub thiab txias thiab siab puas.

#8 Faulty Actuator

Actuators tuaj nyob rau hauv peb hom: phau ntawv, powered los yog tsis siv neeg.Actuators tswj kev nkag thiab tawm ntawm cov xov xwm thiab ntws ntawm xov xwm, siab, thiab kub.Uas tau hais tias, xaiv qhov tsis ncaj ncees lawm actuator shortens lub neej ntawm lub valve vim hais tias lub valve hnav tawm yooj yim.

Kev siv tsis raug ntawm qhov hluav taws xob tuaj yeem ua rau overheating.Tsis tsuas yog tias overheating tuaj yeem ua rau hluav taws, tab sis nws tuaj yeem ua rau lub actuator puas tag.

Kev daws
Cov tswv yim muaj zog los ntawm tus actuator tuaj yeem ua rau lub valve qia thiab disc thaum lub valve kaw los yog qhib.Yog tias cov xov xwm qeeb qeeb, xaiv cov actuators uas haum rau qhov no.Yog tias kom tsis txhob poob siab, xaiv tus actuator uas tuaj yeem qhib lossis kaw tau yooj yim.

Kom paub seb lub valve puas puas lossis nws tsuas yog tus actuator uas ua yeeb yam txawv, tig rau phau ntawv hla dhau.Nws lub valve zoo li ok, lub actuator puas lawm.

Yog tias lub valve tsis txav, qhov teeb meem yog tus actuator.Tsis tas li ntawd, xyuas cov qia valve kom muaj kev puas tsuaj.Ib lub pob valve qias neeg cuam tshuam li cas tus actuator txav.

Txhim kho nws cov khoom rhiab yuav tsum nyob deb ntawm lub actuator thaum muaj kev kub siab lossis muaj peev xwm ntawm kev vibrations siab.Qhov no yog los tiv thaiv qhov chaw rhiab los ntawm kev puas tsuaj.

NEMA (National Electrical Manufacturers Association) tau teeb tsa cov kev ntsuas hluav taws xob rau kev nyab xeeb.

#9 Kev teeb tsa tsis raug

Qee lub valve yog yooj yim rau nruab dua lwm tus.Tu siab, ntau zaus ntawm valve tsis ua hauj lwm los ntawm qhov tsis raug valve installation.Piv txwv li lub installation ntawm viav vias kos li qub.Qee tus neeg tau txhim kho lawv nyob rau hauv qhov tsis ncaj ncees lawm kev taw qhia.Muaj cov cim ua raws rau kev txhim kho yooj yim dua.

Kev daws
Feem ntau cov li qub tau teeb tsa rau hauv txoj haujlwm upright tshwj tsis yog tias tau teev tseg.Xyuas kom tseeb tias tus neeg txhim kho lub valve muaj kev txawj txaus thiab kev cob qhia kom ua tau haujlwm zoo.

#10 Kev ua haujlwm tsis raug thiab teeb tsa qhov sib txawv

Kev khiav hauj lwm siab yog tus nqi ntawm qhov tseeb siab tam sim no thaum ua haujlwm.Ntawm qhov tod tes, teeb tsa siab yog tus qauv siab uas tus neeg siv yeeb nkab teeb tsa rau cov kav dej.Qhov teeb meem feem ntau tshwm sim qhov kev ua haujlwm siab nyob ze rau qhov teeb tsa siab.

Kev daws
Xyuas qhov tseeb ntawm lub valve.Tshwj xeeb yog saib ntawm lub valve disc, lub rooj zaum thiab qia.Tsis tas li ntawd, xyuas seb cov dej xau.Hloov cov khoom puas yog tias tsim nyog.

Cov yam ntxwv xws li cov khoom siv ntawm lub valve, cov xov xwm, lub rooj zaum nruj, thiab lwm yam, tso qhov tsawg kawg nkaus ntawm 10% qhov sib txawv ntawm kev ua haujlwm thiab teeb tsa.Txawm li cas los xij, qhov sib txawv zoo tshaj plaws yog 20%.

#11 Rov qab Flow

Rov qab ntws yog hais txog qhov piv txwv tias qhov ntws ntawm cov xov xwm dheev hloov pauv.Qhov no, ua ke nrog dej rauj, yog ob qho ntawm feem ntau thiab ua rau muaj kev puas tsuaj rau lub valve.

Kev daws
Kev tiv thaiv yog tus yuam sij.Txhim kho lub kaw lus ntsiag to lossis ib lub valve uas kaw nrawm yuav ua kom zoo dua qub.

#12 Deb

Thicker hais xws li hauv slurries ua rau abrasions ntawm lub rooj zaum.Cov no tuaj yeem daig hauv cov li qub, ua rau lub valve tseem qhib lossis kaw.Tsis tas li ntawd, cov khib nyiab, thaum nws hardens hauv lub valve, tuaj yeem ua rau cov khoom siv lub valve tawg.

Kev daws
Kev tu thiab tu lub valve yog qhov tseem ceeb.Cov no tshem tawm cov khib nyiab thiab tiv thaiv cov khib nyiab kom tawv thiab ua kom puas rau cov li qub

#13 Kev tu thiab kho tsis raug

Kev kho tsis raug thiab kev saib xyuas tsis yog tsuas yog kev puas tsuaj xwb, tab sis kuj tseem kim thiab siv sijhawm ntev.

Kev daws
Xyuas kom tseeb tias lub valve orientation yog lawm.Siv cov lus qhia hauv lub cev valve uas tuaj yeem pab txhim kho lub valve kom raug.Xyuas kom tseeb tias cov lus qhia tau ua raws li lub valve orientation.

Cov kev coj ua zoo tshaj plaws kom tsis txhob muaj qhov tsis ua haujlwm valve

Zoo li ntau zaus, kev tiv thaiv zoo dua li kho.Kev saib xyuas tsis tu ncua ua haujlwm los ntawm cov kws tshaj lij kws tshaj lij.Feem ntau lub sij hawm, valves teeb meem tshwm sim vim tib neeg yuam kev.Txhawm rau daws qhov teeb meem no, ntiav cov neeg ua haujlwm txawj thiab cov neeg ua haujlwm tau zoo los txhim kho thiab tswj lub valve thiab kav dej.

Ntxuav cov li qub thiab xyuas kom tseeb tias cov no tsis muaj cov khib nyiab.Yog tias tsim nyog, nruab cov lim dej kom cais cov khib nyiab los ntawm cov xov xwm ntws.Tshem cov kav dej kom txo tau qhov tsim.

Ntxiv rau qhov no, lubricate lub valve.Lub valve yog tsim los ntawm cov khoom me me txav tau.Lubricating no txhais tau tias kev sib txhuam tsawg, uas txo qhov hnav thiab tsim kua muag thiab txhim kho kev ua haujlwm.

Txheeb xyuas cov li qub thiab nws qhov chaw ntawm lub sijhawm.Hloov cov khoom uas tau qhia txog kev puas tsuaj.Qhov no yuav txuas ntxiv lub neej kev pabcuam ntawm lub valve.Tsis tas li ntawd, xyuas kom tseeb tias cov valves raug ntsia zoo.

Hauv Summary

Kev hloov valve yog kim heev.Tias yog vim li cas thiaj li tau txais cov khoom ruaj khov nrog cov ntawv pov thawj kev nyab xeeb yog qhov yuav tsum tau ua.Nco ntsoov xyuas lub valve ntawm thawj lub cim ntawm kev puas tsuaj valve, kho qhov yuav tsum tau kho thiab hloov cov khoom puas.