Phau Ntawv Qhia Pib Pib rau 7 Hom Flow Meters thiab Cov Lus Qhia Xaiv

Kev ntsuas ntws tsis yog ib qho kev nthuav dav xwb; nws yog cov mem tes ntawm cov txheej txheem kev lag luam, ua kom muaj kev nyab xeeb, raug, thiab txuag nqi. Nrog ntau tshaj 100 homflow metersdej nyab kev lag luam niaj hnub no, xaiv ib qho nrog qhov ua tau zoo tshaj plaws-rau-tus nqi piv tuaj yeem xav tias nyuaj. Phau ntawv qhia no tshawb txog cov kev nkag siab tseem ceeb ntawm kev ntsuas ntsuas, pab koj xaiv cov kev ntseeg siab. Txawm hais tias koj yog ib tus kws tshaj lij txhim kho lub raj xa dej lossis tus thawj tswj hwm kev siv nyiaj rau kev hloov kho tshiab, cia peb dhia mus rau qhov tseem ceeb ntawm cov ntsuas dej ntws, lawv lub zog, thiab cov lus qhia tswv yim rau kev xaiv.

Nkag siab Flow Meters: Vim li cas Lawv Tseem Ceeb hauv Kev Lag Luam Automation

Ntwstus nqiislub hauv paus tseem ceeb parameter nyob rau hauv industrial ntau lawm, tswj txhua yam ntawm cov tshuaj tiv thaiv rau lub zog faib. Nyob rau xyoo 1970, kev sib txawv ntawm kev siv tshuab tau tuav 80% kev lag luam sib koom, tab sis kev tsim kho tshiab tau pib ua kom ntse dua thiab ntau yam kev xaiv. Hnub no,xaiv qhov ntwsmeterkoom nrogntsuas cov yam ntxwv xws li hom kua dej, kev ua haujlwm, kev xav tau raug, thiab pob nyiaj siv. Los ntawm kev ua haujlwm nyob rau hauv ib puag ncig hnyav, xws li offshore roj rigs lossis chav tsev tshuaj, tus yuam sij yog sib piv cov meter tus yam ntxwv rau koj daim ntawv thov tshwj xeeb kom tsis txhob muaj sijhawm poob thiab nyeem tsis raug.

Cov ntawv tshaj tawm no yuav tshawb txog xya pawg loj ntawm cov ntsuas ntsuas uas feem ntau siv hauv kev lag luam, qhia txog lawv cov yam ntxwv, qhov zoo, qhov tsis zoo, thiab cov ntawv thov hauv ntau hom. Tsuas yog ua raws li kom paub cov tswv yim uas tau piav qhia los xaiv lub ntsuas dej ntws!

1. Sib Nqus Siab Flow Meters: Tus Ua Haujlwm Ua Haujlwm Zoo

Differential siabntsuasseemcov cuab yeej siv dav siv ntau tshaj plaws, muaj peev xwm tuav cov kua dej ib zaug nyob rau hauv ntau yam kev mob, nrog rau qhov kub thiab txias. Nyob rau hauv nws lub hnub qub thaum xyoo 1970, nws tau ntes 80% ntawm kev ua lag luam rau qhov laj thawj zoo. Cov ntsuas no feem ntau muaj cov cuab yeej throttling (xws li ib lub phaj orifice, nozzle, Pitot raj, los yog nruab nrab Pitot raj) ua ke nrog lub transmitter.

Cov cuab yeej throttling constricts cov kua ntws, tsim kom muaj qhov sib txawv ntawm cov dej ntws thiab cov dej hauv qab uas yog proportional rau tus nqi ntws. Orifice daim hlau yog qhov kev xaiv mus rau vim lawv qhov yooj yim thiab yooj yim ntawm kev teeb tsa. Tsuav lawv tau tsim thiab teeb tsa rau ib tus qauv (xav tias ISO 5167), lawv xa cov kev ntsuas txhim khu kev qha yam tsis xav tau kev ntsuas qhov tseeb tab sis tsuas yog kev soj ntsuam ceev.

Uas tau hais tias, tag nrho cov khoom siv throttling qhia txog kev poob siab mus tas li. Lub phaj ntse-edged orifice tuaj yeem poob 25-40% ntawm qhov sib txawv siab tshaj plaws, uas ntxiv rau cov nqi hluav taws xob rau kev ua haujlwm loj. Pitot raj, ntawm qhov tod tes, muaj qhov tsis txaus ntseeg tab sis muaj kev cuam tshuam rau cov kev hloov pauv hauv cov ntaub ntawv ntws, vim tias kev kub ntxhov tuaj yeem cuam tshuam lawv cov kev nyeem.

Hauv cov nroj tsuag petrochemical, cov neeg ua haujlwm tau hloov pauv cov paib tsis tu ncua rau Venturi hlab kom txo qis kev poob siab, ua rau 15% txo cov twj siv zog. Yog li ntawd, thaum soj ntsuam nrog cov kua dej khov los yog slurries, nws ua rau kev txiav txim siab los txiav txim siab nruab nrab Pitot raj rau qhov raug zoo dua hauv cov dej tsis sib xws. Dab tsi yog qhov tsim nyog hais txog yog tias ib txwm ua kom tsawg kawg 10-20 yeeb nkab diameters ntawm txoj kab ncaj nraim mus rau qhov chaw ntws mus kom ruaj khov, lossis cov neeg ua haujlwm yuav raug daig hauv calibration mob taub hau.

2. Qhov ntsuas qhov sib txawv hauv cheeb tsam: Simplicity ntsib ntau yam

Coviconic rotameter sawv cevQhov chaw sib txawv ntawm qhov ntws ntsuas, qhov twg lub ntab nce hauv lub raj tapered proportional rau tus nqi ntws. Lawv qhov zoo tshaj plaws perk? Kev nyeem ntawv ncaj qha, ntawm qhov chaw tsis muaj lub zog sab nraud, uas yog qhov zoo tshaj plaws rau kev kuaj xyuas sai hauv thaj teb.

Cov no tuaj nyob rau hauv ob lub ntsiab flavors: iav raj rotameters rau ambient, uas tsis yog-corrosive xov xwm zoo li huab cua, gases, los yog argon, muab ntshiab visibility thiab yooj yim nyeem ntawv;thiabhlaucevrotameter ntsuascov qauvnrog cov ntsuas magnetic rau qhov kub thiab txias los yog siab siab scenarios. Cov tom kawg tuaj yeem tso tawm cov qauv teeb liab rau kev koom ua kenrogcov kaw lusorTotalizers.

Niaj hnub nimno variants muaj xws li caij nplooj ntoos hlav-loaded conical designs uas tsis muaj condensate chambers, boasting ib tug 100: 1 turndown ratio thiab linear output, zoo tagnrho rau chav ntsuas.

Thaum hais txog cov kev siv dav, ntau lub rotameters raug xaiv los siv rau hauv qhov chaw sim rau kev sib xyaw roj, uas txuag cov nqi xaim ua tsaug rau qhov tsis muaj lub zog xav tau. Tab sis saib tawm rau kev vibrations, cov rotameters tuaj yeem ua rau ntab jitter thiab nyeem ntawv cuav. Nyob rau hauv lub brewery txawj tej yam ntxiv, piv txwv li, cov hlau raj qauv coj kub wort ntws, ncua kev pab cuam lub neej peb zaug, thaum armored iav versions nrog PTFE linings yog ib tug siv nyiaj txiag xaiv, tab sis cov neeg ua hauj lwm yuav tsum tau calibrate lawv txhua xyoo kom tswj tau 1-2% raug.

3. Vortex Flow Meters: Oscillation rau Precision

Vortex meters, ib qho piv txwv tseem ceeb ntawm oscillatory hom, tso ib lub cev bluff nyob rau hauv txoj kev khiav, tsim alternating vortices uas nws zaus correlates rau tshaj tawm. Tsis muaj qhov txav mus los txhais tau hais tias rov ua tau zoo dua qub, kev ua neej ntev, thiab kev saib xyuas tsawg.

Tuav qhov zoo ib yam li cov kab dav dav, tiv thaiv qhov kub thiab txias, siab, ntom, lossis viscosity hloov, tsis tshua muaj siab poob, thiab qhov tseeb siab (0.5-1%), vortex flow meters kov txog 300 ° C thiab 30 MPa, ua rau lawv muaj ntau yam rau roj, kua, thiab chav.

Cov txheej txheem sensing hauv vortex flow meters txawv ntawm qhov nruab nrab: piezoelectric sensors yog qhov zoo tagnrho rau chav, thermal lossis ultrasonic sensors haum rau huab cua, thiab yuav luag txhua qhov kev xav ua haujlwm rau dej. Zoo ib yam li orifice daim hlau, qhov ntws coefficient yog txiav txim siab los ntawm qhov ntsuas qhov ntev.

Nyob rau hauv qhov project gas pipeline, vortex meters outperform turbines nyob rau hauv pulsating flows, txo qhov yuam kev los ntawm 5% mus rau hauv 1%. Lawv rhiab heev rau kev teeb tsa, uas ua kom muaj kev ncaj ncees thiab tsis txhob sib thooj rau cov li qub. Thaum nws los txog rau cov qauv tshiab, wireless vortex meters nrog roj teeb lub neej mus txog 10 xyoo rau cov chaw nyob deb.

4. Electromagnetic Flow Meters: Conductive Fluids 'Tus phooj ywg zoo tshaj plaws

Electromagnetic meters, los yog mag meters, siv Faraday txoj cai, uas mus zoo li no: conductive kua txiav los ntawm ib tug magnetic teb induce ib tug voltage proportional rau cov ntws. Txwv tsis pub siv cov xov xwm, cov ntsuas no tsis cuam tshuam los ntawm qhov kub, siab, ntom, lossis viscosity - theoretically, tsawg kawg - nrog 100: 1 turndown thiab 0.5% raug. Cov yeeb nkab loj li ntawm 2mm mus rau 3m, haum rau dej, slurries, pulps, lossis corrosives.

Electromagnetic flow meter tsim cov teeb liab tsis muaj zog (2.5-8 mV ntawm tag nrho cov nplai), yog li ua kom muaj kev tiv thaiv thiab kev cog lus hauv av yog qhov tseem ceeb kom tsis txhob cuam tshuam nrog lub cev muaj zog.

Electromagnetic flow meter ua tau zoo hauv cov chaw kho dej khib nyiab, ntseeg tau ntsuas cov dej qias neeg zoo li slurries yam tsis muaj clogging. Tsis zoo li mechanical meters, mag meters tsis muaj qhov txav. Rau cov kua dej corrosive, xws li cov dej khib nyiab, kev kho dua tshiab rau PFA-lined mag meters tuaj yeem txo cov kev xav tau kev saib xyuas txog li 50% raws li pom hauv cov nroj tsuag tsis ntev los no retrofit. Tsis tas li ntawd, roj teeb-powered mag meters tau txais traction rau tej thaj chaw deb dej metering, muab yooj yooj yim nyob rau hauv off-daim phiaj qhov chaw thaum tuav ib yam clog-dawb kev ntseeg.

5. Ultrasonic Flow Meters: Tsis-Intrusive Innovation

Ultrasonic flowmeterstuajnyob rau hauv ob hom thawj: Doppler thiab lub sij hawm-ntawm-flight (TOF).Dopplermetersntsuasntws los ntawm kev kuaj xyuas qhov zaus hloov ntawm cov khoom raug tshem tawm, ua rau lawv zoo tagnrho rau cov khoom siv hluav taws xob siab, cov kua dej qias neeg zoo li slurries, tab sis tsis tshua muaj txiaj ntsig rau qhov qis qis lossis cov yeeb nkab ntxhib.

TOF meters, uas xam cov dej ntws raws lub sij hawm sib txawv ntawm ultrasonic nthwv dej mus ncig nrog thiab tawm tsam qhov ntws, ua tau zoo hauv cov dej huv, zoo li dej, xav tau cov khoom siv hluav taws xob kom raug. Multi-beam TOF designs txhim khu kev ua tau zoo nyob rau hauv turbulent flows, muab ntau dua kev ntseeg siab nyob rau hauv complex systems.

Nyob rau hauv lub txias dej system retrofit, clamp-on TOF ultrasonic meters tau txais kev cawmdim ntau txhiab los ntawm kev tshem tawm qhov xav tau ntawm cov yeeb nkab txiav lossis kaw, ua tiav 1% qhov tseeb nrog kev ntsuas kom raug. Txawm li cas los xij, huab cua npuas lossis cov yeeb nkab txheej tuaj yeem cuam tshuam kev nyeem ntawv, yog li kev ntsuas qhov chaw zoo yog qhov tseem ceeb. Rau kev tshawb xyuas teb, cov khoom siv ultrasonic portable yog qhov tseem ceeb, muab kev kuaj mob sai yam tsis muaj lub sijhawm kaw.

6. Turbine Flow Meters: Ceev thiab qhov tseeb hauv kev txav

Turbine ntwsmeters ua haujlwmntawm lub hauv paus ntsiab lus ntawm kev txuag hluav taws xob, qhov twg cov dej ntws ntws tawm ntawm lub rotor, thiab lub rotor qhov nrawm ncaj qha cuam tshuam rau qhov ntws. Cov 'meter' no yeej muaj nyob rau hauv cov ntawv thov uas xav tau kev ua haujlwm siab, nrog cov qauv siv roj tshwj xeeb uas muaj cov hniav me me thiab cov hniav ntau dua los txhim kho kev ua haujlwm hauv cov kua dej qis. Lawv muab qhov tseeb tshwj xeeb (0.2-0.5%, lossis 0.1% hauv cov xwm txheej tshwj xeeb), 10: 1 turndown ratio, tsis tshua muaj siab poob, thiab kev ua haujlwm zoo nyob rau hauv kev kub siab, tab sis xav tau cov kua dej huv thiab cov yeeb nkab ncaj txaus khiav kom tsis txhob muaj kev kub ntxhov.

Hauv aviation roj system,turbine ntwsmetersxyuaspinpoint qhov tseeb rau kev saib xyuas kev hloov pauv, tseem ceeb rau kev them nqi precision. Ib qho me me ntso muaj ntau qhov ua kom loj dua rau cov kua dej tsis sib haum thiab viscosity, yog li cov kev ua kom muaj zog ua kom muaj zog yog qhov yuav tsum tau ua txhaum cai. Hybrid designs nrog sib nqus pickups tau txhim kho kev ntseeg tau los ntawm kev txo cov neeg kho tshuab hnav.

7. Positive Displacement Flow Meters: Volumetric Precision

Qhov zoo ntawm cov dej ntws ntws ntsuas ntsuas qhov ntws los ntawm kev ntxiab thiab tshem tawm cov kua dej ruaj khov nrog txhua qhov kev sib hloov, siv cov qauv tsim xws li oval iav, piston teb, lossis hom scraper. Oval iav ntsuas muab 20: 1 turndown ratio thiab siab raug (feem ntau yog 0.5% lossis zoo dua) tab sis muaj kev cuam tshuam los ntawm cov khib nyiab hauv cov kua dej. Rotary piston meters ua tau zoo ntawm kev tuav cov ntim loj, txawm tias lawv cov qauv tsim tuaj yeem tso cai rau me ntsis, cuam tshuam qhov tseeb hauv qhov xwm txheej qis.

Tsis muaj kev cuam tshuam los ntawm cov kua dej viscosity, PD meters yog qhov zoo tagnrho rau cov kua dej xws li roj thiab dej, tab sis tsis haum rau cov pa roj los yog chav dej vim lawv lub tshuab ntim.

Hauv cov chaw ua zaub mov, PD metres, tshwj xeeb tshaj yog hom iav oval, yog qhov tseem ceeb rau kev siv cov khoom noj khov ntawm cov kua dej khov, ua kom cov khoom zoo ib yam. Txawm li cas los xij, cov khib nyiab hauv cov syrups uas tsis tau lim ua rau qee lub sij hawm jams, underscoring qhov yuav tsum tau rau robust filtration systems. Clean-in-place (CIP) tsim kom txo qis lub sijhawm los ntawm kev ua kom yooj yim, kev hloov pauv kev ua si rau cov kab ntau dhau.

Xaiv Txoj Cai Flow Meter: Cov Tswv Yim rau Kev Ua Haujlwm Zoo

Xaiv lub ntsuas dej ntws zoo yog qhov tseem ceeb rau kev ua kom zoo rau cov txheej txheem kev lag luam, vim tsis muaj ib lub meter haum rau txhua daim ntawv thov. Txhawm rau txiav txim siab xaiv, ntsuas cov khoom tseem ceeb: cov kua dej (piv txwv li, viscosity, corrosiveness, lossis cov ntsiab lus tshwj xeeb), ntws ntau (tsawg kawg thiab siab tshaj), qhov yuav tsum tau muaj tseeb (los ntawm 0.1% rau kev saib xyuas hloov mus rau 2% rau kev saib xyuas dav dav), kev txwv kev teeb tsa (xws li cov yeeb nkab loj, kev siv hluav taws xob ncaj qha, thiab cov kev txwv ntawm kev yuav khoom, tag nrho cov kev txwv, thiab cov kev txwv ntawm kev yuav khoom). cov nqi).

Los ntawm kev ntsuas qhov ntsuas qhov ntsuas no tawm tsam koj cov txheej txheem xav tau, qhov zoo tshaj plaws nrog kev sim ntsuas lossis kev sib tham ntawm tus neeg muag khoom, koj tuaj yeem xaiv lub ntsuas ntsuas uas ntsuas qhov ua tau zoo thiab nyiaj txiag.