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Npauj npaim li qub yog sib dua, me dua, thiab sib dua li lwm hom kev tswj li qub, ua rau lawv xaiv zoo tshaj plaws rau kev tswj cov dej ntws hauv ntau daim ntawv thov. Tus qauv npauj npaim li qub yog ib txwm siv rau kev siv tsis siv neeg qhib / kaw, thiab lawv zoo haum rau lub luag haujlwm no. Txawm li cas los xij, thaum nws los txog rau kev tswj cov dej ntws hauv lub kaw lus kaw, qee tus engineers xav tias lawv tsis tsim nyog.
Npauj npaim valve siv lub rotating disc los tswj cov dej ntws los ntawm cov yeeb nkab. Discs feem ntau tuaj yeem ua haujlwm los ntawm 90 degrees, yog li lawv qee zaum hu ua lub quarter-tig li qub. Feem ntau, lawv siv thaum xav txog kev lag luam. Thaum yuav tsum kaw nruj, npauj npaim li qub nrog cov mos mos elastic seals thiab / lossis coated discs tuaj yeem siv los muab kev ua haujlwm xav tau. Qhov kev ua haujlwm siab npauj npaim valve (HPBV)-los yog ob chav offset valve-yog tam sim no tus qauv kev lag luam rau npauj npaim tswj li qub thiab tau dav siv rau kev tswj cov throttling. Lawv ua tau zoo rau cov ntawv thov nrog kev poob siab tas li lossis qeeb txheej txheem loops.
Qhov zoo ntawm HPBV suav nrog txoj hauv kev ncaj nraim, muaj peev xwm siab, thiab muaj peev xwm ua kom yooj yim dhau cov khoom thiab cov kua nplaum. Lawv cov nqi teeb tsa feem ntau yog qis tshaj ntawm txhua hom valve, tshwj xeeb tshaj yog NPS 12 thiab cov valve loj dua. Piv nrog rau lwm hom li qub, lawv cov nqi kom zoo dua ntxiv thaum qhov loj dua 12 ntiv tes.
Lawv tuaj yeem muab kev kaw haujlwm zoo hauv qhov kub thiab txias, thiab muab cov qauv sib txawv ntawm lub cev, suav nrog hom wafer, hom lug thiab ob lub flange. Lawv yog cov sib zog ntau dua li lwm hom li qub thiab muaj ntau qhov sib txuam. Piv txwv li, 12-nti ANSI Chav Kawm 150 ob lub flange segmented pob valve hnyav 350 phaus thiab muaj lub ntsej muag-rau-lub ntsej muag ntawm 13.31 ntiv tes, thaum sib npaug 12-nti lug npauj npaim valve hnyav tsuas yog 200 phaus thiab lub ntsej muag-rau- ntsej muag dimension ntawm 3 nti.
Npauj Npaim li qub muaj qee qhov kev txwv uas ua rau lawv tsis tsim nyog rau kev tswj xyuas hauv qee yam kev siv. Cov no suav nrog kev muaj peev xwm txo qis qis piv rau cov pob li qub, nrog ntau dua cavitation lossis flashing peev xwm.
Vim tias thaj tsam loj ntawm lub disc ua raws li lub zog siv lub zog ntawm qhov nruab nrab ntws mus rau lub tog raj kheej, cov qauv npauj npaim li qub feem ntau tsis siv rau cov ntawv thov siab. Yog tias muaj, qhov loj thiab kev xaiv ntawm tus actuator ua qhov tseem ceeb.
Qee zaum nws tshwm sim tias npauj npaim tswj valve yog qhov loj, uas yuav muaj kev cuam tshuam tsis zoo rau cov txheej txheem kev ua haujlwm. Qhov no tej zaum yuav yog vim siv cov kav dej loj li qub, tshwj xeeb tshaj yog muaj peev xwm loj npauj npaim li qub. Nws tuaj yeem ua kom cov txheej txheem sib txawv ntawm ob txoj hauv kev. Ua ntej ntawm tag nrho cov, oversize coj ntau dhau mus rau lub valve, thiab yog li tsis yooj yim rau kev kho tus maub los. Qhov thib ob, cov khoom siv loj tuaj yeem ua haujlwm ntau dua ntawm qhov qis qis qis, thaum lub sealing kev sib txhuam ntawm npauj npaim li qub yuav ntau dua. Vim hais tias rau ib tug muab valve stroke increment, ib tug heev loj valve yuav tsim disproportionate loj txaus hloov. Qhov no tshwm sim yuav ua rau exaggerate cov txheej txheem variability cuam tshuam nrog rau qhov chaw tuag vim kev sib txhuam.
Code-setters qee zaum siv npauj npaim li qub rau kev lag luam lossis hloov mus rau qhov loj me me, tsis hais lawv cov kev txwv. Muaj ib qho kev nthuav dav ntawm npauj npaim valve kom tsis txhob squeezing cov yeeb nkab, uas tuaj yeem ua rau cov txheej txheem tsis zoo.
Qhov kev txwv loj tshaj plaws yog qhov zoo tshaj plaws throttling tswj ntau yam tsis yog dav li qhov nres valve lossis ib lub pob segmented. Npauj npaim li qub feem ntau ua tsis tau zoo sab nraum qhov qhib kev tswj ntawm kwv yees li 30% txog 50%.
Feem ntau, thaum lub voj tswj kev khiav hauj lwm nyob rau hauv ib txoj kab thiab cov txheej txheem nce yog ze rau 1, lub voj yog yooj yim los tswj. Yog li ntawd, tus txheej txheem nce ntawm 1.0 dhau los ua lub hom phiaj rau kev tswj lub voj voog zoo, thiab qhov kev pom zoo yog 0.5 txog 2.0 (ntau 4: 1).
Qhov kev ua tau zoo yog qhov zoo tshaj plaws thaum feem ntau ntawm lub voj nce los ntawm tus maub los. Nco ntsoov tias nyob rau hauv qhov nce nkhaus ntawm daim duab 1, cov txheej txheem nce siab heev hauv cheeb tsam hauv qab no txog 25% ntawm lub valve stroke.
Cov txheej txheem nce qib txhais cov kev sib raug zoo ntawm cov txheej txheem tso tawm thiab kev hloov pauv hloov pauv. Kev mob stroke qhov twg cov txheej txheem nce yog tswj ntawm 0.5 thiab 2.0 yog qhov kev pom zoo ntawm lub valve. Thaum cov txheej txheem nce tsis nyob hauv thaj tsam ntawm 0.5 txog 2.0, kev ua haujlwm tsis zoo thiab lub voj tsis ruaj khov yuav tshwm sim.
Thaum lub valve raug kaw kom qhib, npauj npaim valve disc tsim muaj qhov cuam tshuam loj rau lub valve ntws. Lub disc uas muaj qhov sib npaug ntawm qhov feem pua ntawm cov yam ntxwv tuaj yeem zoo dua los them cov kev poob siab uas hloov nrog tus nqi ntws. Qhov sib npaug feem pua ntawm sab hauv yuav muab cov yam ntxwv ntawm kev teeb tsa los hloov lub siab poob, uas yog qhov zoo tagnrho. Qhov tshwm sim yog qhov tseeb dua ib-rau-ib qhov hloov pauv ntawm tus nqi ntws thiab valve stroke.
Tsis ntev los no, npauj npaim li qub tuaj yeem siv cov discs nrog qhov sib npaug feem pua ntawm cov yam ntxwv ntws. Qhov no muab ib qho kev teeb tsa uas ua rau cov txheej txheem kev teeb tsa tau nce hauv qhov xav tau ntawm 0.5 txog 2.0 hla ntau qhov kev mus ncig. Qhov no yuav ua kom muaj txiaj ntsig zoo rau kev tswj xyuas, tshwj xeeb tshaj yog nyob rau hauv qis qis ntawm kev mus ncig.
Qhov kev tsim no muab kev tswj kom zoo, nrog qhov kev lees paub ntawm 0.5 mus rau 2.0 los ntawm kwv yees li 11% qhib rau 70%, thiab kev tswj ntau yam yog ze li peb zaug siab dua li ntawm qhov kev ua haujlwm siab npauj npaim valve (HPBV) ntawm tib qhov loj. Yog li ntawd, sib npaug feem pua discs muab tag nrho cov txheej txheem qis variability.
Npauj npaim li qub uas muaj qhov sib npaug ntawm qhov feem pua ntawm cov yam ntxwv, xws li kev tswj cov disc li qub, yog qhov zoo tagnrho rau cov txheej txheem uas yuav tsum tau muaj kev tswj xyuas qhov tseeb. Txawm hais tias muaj kev cuam tshuam ntawm cov txheej txheem, lawv tuaj yeem tswj tau ze dua rau lub hom phiaj teeb tsa, yog li txo cov txheej txheem sib txawv.
Yog tias npauj npaim valve tsis ua haujlwm zoo, tsuas yog hloov lub valve nrog qhov loj me los daws qhov teeb meem. Piv txwv li, ib lub tuam txhab ntawv siv ob lub npauj npaim li qub los tswj kev tshem tawm cov dej noo ntawm cov tawv nqaij. Ob lub valve ua haujlwm tsawg dua 20% ntawm cov hlab ntsha tawg, ua rau cov txheej txheem sib txawv ntawm 3.5% thiab 8.0%, feem. Feem ntau ntawm lawv lub neej kev pab yog siv nyob rau hauv phau ntawv hom.
Ob qhov loj me NPS 4 Fisher Control-Disk npauj npaim li qub nrog cov tswj valve tau teeb tsa. Lub voj tam sim no khiav hauv hom tsis siv neeg, cov txheej txheem hloov pauv ntawm thawj lub valve tau nce los ntawm 3.5% mus rau 1.6%, thiab cov txheej txheem hloov pauv ntawm lub valve thib ob tau nce los ntawm 8% mus rau 3.0%, yam tsis muaj kev hloov pauv tshwj xeeb.
Cov dej tsis zoo thiab cov dej ntws tswj cov cua txias hauv cov nroj tsuag steel coj mus rau qhov tsis sib xws hauv cov khoom kawg. HPBV ntsia hauv Jiutai tsis tuaj yeem tswj cov dej ntws zoo raws li qhov xav tau.
Cov nroj tsuag cia siab tias yuav txhim kho li qub uas tuaj yeem tswj cov txheej txheem zoo dua thiab xav tau kom txo qis cov nqi installation. Lub Hoobkas yuav siv $ 10,000 los hloov cov kav dej ntawm txhua lub valve kom hloov ntawm HPBV mus rau segmented pob li qub. Hloov chaw, Emerson pom zoo tias nws Control-Disk npauj npaim valve haum rau HPBV lub ntsej muag tam sim no loj.
Lub Control-Disk valve tau sim ua ke nrog ib qho ntawm cuaj HPBVs uas twb muaj lawm, thiab nws qhov kev ua tau raws li qhov yuav tsum tau ua. Lub Hoobkas tau hloov qhov seem 8 HPBVs hauv ib xyoos, thiab txhua HPBV tau nruab nrog Control-Disk valve. Qhov no tshem tawm qhov xav tau los hloov $ 90,000 pipelines rau segmented pob li qub, thiab tus nqi ntawm pob li qub tau nce li ntawm 25% piv rau npauj npaim li qub.
Control-Disk li qub muab kev tswj xyuas meej thiab pab tshem tawm qhov sib txawv ntawm cov khoom kawg. Cov nroj tsuag steel kwv yees tias kev txhim kho cuaj Control-Disk li qub tuaj yeem txuag tau kwv yees li US $ 1 lab toj ib xyoo.
Piv nrog rau feem ntau ntawm lwm hom valve, HPBV nrog lub digital positioner muaj tus nqi pib qis dua thiab tuaj yeem muab kev tswj kom txaus thaum qhov loj me. Lawv muaj peev xwm ua tau siab thiab muaj kev txwv tsawg kawg nkaus. Lub npauj npaim valve nrog qhov sib npaug ntawm qhov feem pua ntawm cov khoom sab hauv muab lub sijhawm los nthuav cov kev tswj hwm, zoo ib yam li lub ntiaj teb valve lossis lub pob valve, thiab tsuas yog siv qhov chaw ntawm HPBV.
Thaum xaiv cov li qub, tshwj xeeb tshaj yog HPBV, xyuas kom tseeb tias lawv yog qhov loj me, txwv tsis pub lawv yuav raug tswj los ntawm chav tswj. Nws tseem yog ib qho tseem ceeb uas yuav tau xav txog hom valve, cov yam ntxwv ntawm tus kheej, thiab qhov loj ntawm lub valve uas muab qhov dav tshaj plaws rau kev siv.
Mark Nymeyer yog tus thawj tswj hwm kev lag luam thoob ntiaj teb rau kev tswj hwm ntawm Emerson Automation Solutions.
Qhov no tsis yog paywall. Nov yog phab ntsa dawb. Peb tsis xav cuam tshuam koj lub hom phiaj los ntawm no, yog li qhov no tsuas siv ob peb feeb xwb.
Post lub sij hawm: Oct-11-2021
