Lub ntsuas dej ntws ua haujlwm los ntawm kev kuaj xyuas lub cev ua haujlwm ua los ntawm cov kua txav, roj, lossis chav thiab hloov cov lus teb rau hauv qhov ntsuas tau siv tau. Nyob ntawm cov cuab yeej siv tshuab, lub ntsuas hluav taws xob tuaj yeem pom qhov sib txawv ntawm qhov sib txawv, induced voltage, ultrasonic transit lub sij hawm, vortex zaus, rotor txav, txav ntim, hloov tshav kub, los yog tus cwj pwm ntawm lub vibrating raj.
Teb ceev:Kev txav dej ua rau lub cev ntsuas tau. Ib lub sensor pom tias cov lus teb, lub tshuab xa hluav taws xob ua cov teeb liab, thiab cov cuab yeej qhia lossis xa cov nqi ntws, tag nrho cov dej ntws, huab cua ntws, lossis lwm tus nqi suav.
Tsis muaj lub hauv paus ntsiab lus ua haujlwm thoob ntiaj teb rau txhua qhov ntsuas ntsuas. Lub ntsuas hluav taws xob sib nqus tsis ntsuas qhov ntws zoo ib yam li ultrasonic, turbine, Coriolis, lossis qhov ntsuas qhov sib txawv. Kev nkag siab txog qhov sib txawv no yog thawj kauj ruam mus rau kev xaiv ib qho cuab yeej uas yuav ua tau raws li cov txheej txheem tiag tiag.
Dab tsi yog Flow Meter ntsuas qhov tseeb?
Ua ntej sib piv cov thev naus laus zis, nws yog ib qho tseem ceeb kom paub qhov txawv ntawm qhov nrawm nrawm, ntim ntim, huab hwm coj ntws, thiab cov dej ntws. Cov ntsiab lus no piav qhia txog kev ntsuas sib txawv tab sis txawv.
Flow Velocity
Flow velocity piav qhia tias cov kua txav nrawm npaum li cas los ntawm cov yeeb nkab lossis channel. Nws yog feem ntau qhia nyob rau hauv meters ib ob los yog taw ib ob.
Qee lub 'meter' ntsuas qhov nrawm- cuam tshuam cuam tshuam thiab tom qab ntawd siv cov yeeb nkab hauv cheeb tsam los xam cov ntim ntim. Rau tag nrho cov yeeb nkab ncig, qhov kev sib raug zoo yog:
Q = A × v
- Qyog volumetric flow rate.
- Ayog sab hauv -sectional cheeb tsam.
- vyog qhov nruab nrab ntawm cov dej tshaj tawm.
Qhov kev sib npaug no pab piav qhia qhov nrawm- raws li kev ntsuas, tab sis nws tsis yog tus qauv ntsuas ntsuas thoob ntiaj teb. Cov ntsuas qhov ntsuas tau zoo suav cov ntim paub, thaum Coriolis meters ntsuas huab hwm coj ncaj qha.
Volumetric Flow Rate
Volumetric flow piav qhia ntau npaum li cas lub cev ntim dhau los ntawm qhov ntsuas qhov taw qhia thaum lub sijhawm teev tseg. Cov chav nyob muaj xws li litres ib feeb, cubic meters ib teev, gallons ib feeb, thiab cubic feet ib feeb.
Kev ntsuas Volumetric feem ntau yog siv rau kev faib dej, cua txias Circuit Court, kua hloov, kev kho dej khib nyiab, dej, thiab kev saib xyuas cov txheej txheem dav dav.
Mass Flow Rate
Mass flow piav qhia tias cov kua dej ntau npaum li cas dhau los ntawm lub 'meter' ib chav tsev ntawm lub sijhawm. Cov chav tsev feem ntau suav nrog kilograms ib teev, tonnes ib teev, thiab phaus ib teev.
Cov dej ntau dhau los ua qhov tseem ceeb tshwj xeeb thaum cov kua dej hloov pauv nrog qhov kub, siab, lossis muaj pes tsawg leeg. Coriolis meters ntsuas huab cua ntws ncaj qha. Thermal mass meters siv cov cua kub hloov mus los txiav txim siab huab cua txaus rau cov pa roj uas tsim nyog.
Instantaneous Flow thiab Totalized Flow
Instantaneous flow qhia tias cov kua txav ceev npaum li cas ntawm lub sijhawm tam sim no. Totalized flow yog cov khoom ntim uas tau dhau los ntawm lub 'meter'.
- 20 m³/hyog ib qho instantaneous volumetric flow rate.
- 12,500 m³yog lub ntim ntim.
Cov ntawv thov xws li kev tswj cov txheej txheem yuav tsom mus rau tus nqi tam sim. Kev hloov pauv, kev saib xyuas kev noj haus, kev ua khoom noj, thiab kev them nqi kuj yuav xav tau aflow totalizer.
Qhov tseeb thiab Standard Gas Flow
Gas ntim hloov raws li qhov siab thiab kub hloov. Yog vim li ntawd, qhov tseeb volumetric ntws ntsuas hauv cov yeeb nkab tsis tuaj yeem sib npaug rau cov qauv lossis cov roj ntim li qub.
Standard gas flow sawv cev rau cov roj ntim hloov mus rau kev siv siab thiab kub kub. Cov xwm txheej siv yuav tsum tau hais vim tias kev lag luam sib txawv thiab cheeb tsam yuav siv cov qauv sib txawv. Rau compressible gases, siab, kub, roj muaj pes tsawg leeg, thiab compressibility tej zaum yuav muaj feem xyuam rau cov hloov dua siab tshiab.
Yog li ntawd, tus neeg yuav khoom yuav tsum tau qhia seb qhov yuav tsum tau ua yog qhov ntim tiag tiag, ntim cov qauv, lossis cov dej ntws ncaj qha.
Yuav Ua Li Cas Fluid Movement Ua Kev Nyeem Nyeem?
Cov ntsuas hluav taws xob feem ntau siv plaub -theem ntsuas saw.
- Cov kua ua rau lub cev teb:Cov kua txav txav tuaj yeem ua rau lub siab poob, qhov hluav taws xob, qhov sib txawv ntawm lub sijhawm acoustic, zaus, kev hloov kho tshuab, raj deflection, lossis cua sov- hloov pauv.
- Lub ntsiab lus sensing ntes cov lus teb:Electrodes, transducers, siab sensors, magnetic pickups, kub sensors, los yog cov khoom siv tshuab hloov cov lus teb rau hauv cov teeb liab nyoos.
- Lub transmitter ua cov teeb liab:Cov khoom siv hluav taws xob siv cov ntaub ntawv calibration, them nyiaj, cov ntaub ntawv yeeb nkab, cov khoom siv dej, lim dej, thiab kev suav lej.
- Cov txiaj ntsig tau tshwm sim los yog kis tau:Tus nqi kawg tuaj yeem pom hauv zos lossis xa los ntawm 4-20 mA, mem tes, relay, HART, RS485 Modbus, lossis lwm qhov kev sib txuas lus.
Lub sensor thiab transmitter yuav raug muab tso rau hauv ib lub twj paj nruag los yog ntsia sib cais. Ib qho kev ntsuas ua tiav kuj tseem suav nrog cov cuab yeej siv siab thiab ntsuas kub, cov tshuab computer ntws, cov khoom siv tag nrho, tswj cov li qub, thiab PLC lossis DCS kev sib txuas.
Lub Hom Phiaj Tseem Ceeb ntawm Flow Meters Ua Haujlwm li cas?
Cov neeg tsim khoom loj pab pawg ntws ntsuas los ntawm lub cev lub hauv paus ntsiab lus siv los txheeb xyuas cov dej txav. Txhua lub hauv paus ntsiab lus muaj qhov sib txawv, kev txwv, kev xav tau ntawm kev teeb tsa, thiab cov xov xwm tsim nyog. Cov ntu hauv qab no piav qhia txog kev lag luam technologies feem ntau.
Differential Pressure Flow Measurement
Lub zog sib txawv ntsuas qhov sib txawv ntawm lub siab tsim thaum cov kua dej dhau los ntawm kev txwv lossis cov ntsiab lus tseem ceeb. Cov ntsiab lus tseem ceeb muaj xws li cov phaj hauv qhov ncauj, Venturi raj, nozzles, thiab nruab nrab pitot hlab.
A Differential siab transmitterkuaj pom cov dej ntws ntws thiab qis qis. Kev suav cov dej ntws ces siv qhov ntsuas qhov sib txawv ua ke nrog cov ntsiab lus geometry, qhov ntev ntawm cov yeeb nkab, thiab cov kua dej.
Nyob rau hauv yooj yim incompressible tej yam kev mob, ntws yog proportional rau square root ntawm txawv siab es tsis ncaj proportional rau siab sib txawv.
Zoo tshaj plaws rau:ntau daim ntawv thov kua, roj, thiab chav dej, tshwj xeeb tshaj yog qhov tsim qauv thiab siab -siab lossis siab - qhov ntsuas kub yuav tsum tau tsim.
Qhov tseem ceeb txwv:lub hauv paus tseem ceeb tuaj yeem tsim kev poob siab mus tas li, thaum cov kav dej impulse, kev them nyiaj ceev, siab tapping, thiab ntws -cov xwm txheej profile tuaj yeem cuam tshuam tag nrho cov kev ntsuas tsis paub meej.
Electromagnetic Flow Meters
Ib qho electromagnetic flow meter siv Faraday txoj cai ntawm electromagnetic induction. Coils tsim ib qho chaw sib nqus thoob plaws lub raj ntsuas. Thaum cov kua hluav taws xob txav mus los ntawm qhov chaw ntawd, nws tsim hluav taws xob. Electrodes pom qhov voltage, uas yog proportional rau nruab nrab kua tshaj tawm.
Lub ' meter ' sib txuas cov ntsuas qhov nrawm nrog qhov paub hauv cheeb tsam los xam cov ntim ntim.
Electromagnetic flowmetermuaj qhov qhib ntsuas raj tsis muaj rotor lossis lub cev bluff. Lawv feem ntau txiav txim siab rau dej, dej khib nyiab, slurries, tshuaj conductive, thiab ntau yam khoom noj lossis dej haus.
Zoo tshaj plaws rau:conductive kua, nrog rau cov ntawv thov uas muaj cov khoom raug tshem tawm.
Qhov tseem ceeb txwv:cov kua yuav tsum tau raws li qhov yuav tsum tau conductivity ntawm tus qauv xaiv. Cov khoom siv hluav taws xob, cov ntaub ntawv sib xws, hauv av, tag nrho - yeeb nkab tej yam kev mob, thiab khoob - yeeb nkab nrhiav kom tau txais kev saib xyuas.
Ultrasonic Flow Meters
Ultrasonic meters siv lub suab nthwv dej los txiav txim siab cov dej tawm. Ob qhov zoo tshaj plaws -txoj kev paub yog kev thauj mus los- sijhawm thiab Doppler ntsuas.
Kev thauj mus los-Kev ntsuas lub sijhawm
Transit-time meters xa ultrasonic signals ob leeg nrog thiab tawm tsam cov kev taw qhia ntawm ntws. Lub suab ncig nrog cov kua dej tuaj txog sai dua lub suab tawm tsam nws. Lub transmitter xam qhov nrawm ntawm qhov sib txawv me me ntawm ob lub sijhawm mus ncig.
Kev thauj mus los- lub sijhawm ntsuas yuav nyob hauv kab, ntxig, lossis txuas sab nraud. AUa kua ultrasonic flow meteryog li ntawd tuaj yeem tiv tauj cov txheej txheem ncaj qha lossis ntsuas los ntawm cov yeeb nkab phab ntsa.
Doppler Kev Ntsuas
Doppler meters tsom xam qhov zaus hloov ntawm lub suab tshwm sim los ntawm kev txav npuas lossis cov khoom raug tshem tawm. Lawv xav tau cov reflectors tsim nyog nyob rau hauv cov kua thiab yuav tsum tsis txhob raug kho raws li interchangeable nrog transit -time meters.
Zoo tshaj plaws rau:tsis yog-kev ntsuas qhov ntsuas tsis raug, kev tshawb fawb ib ntus, cov kav dej loj, kev saib xyuas lub zog, thiab cov ntawv thov uas txiav cov yeeb nkab yog qhov tsis xav tau.
Qhov tseem ceeb txwv:cov khoom siv yeeb nkab, phab ntsa tuab, hauv ob sab phlu, qhov chaw ntawm qhov chaw, qhov sib txawv ntawm qhov sib txawv, qhov sib txuas ntawm lub suab, cov kua dej, cov hnab ntim roj, cov nyiaj tso cia, thiab cov dej ntws tawm tuaj yeem cuam tshuam cov teeb liab zoo.
Coriolis Mass Flow Meters
Lub Coriolis meter tsav ib lossis ntau lub raj ntsuas rau hauv kev tswj kev co. Raws li huab hwm coj txav mus los ntawm lub vibrating raj, cov khoom nkag thiab qhov hluav taws xob teb txawv. Sensors ntes cov theem ua haujlwm hloov lossis lub raj deformation, thiab lub transmitter hloov cov lus teb no mus rau hauv cov huab cua ncaj qha.
Zoo tshaj plaws rau:mass batching, blending, density monitoring, high-value liquids, and processes where changes in density make volumetric measurement less useful.
Qhov tseem ceeb txwv:'meter' tus nqi, siab poob, qhov hnyav, kev txhawb nqa yeeb nkab, kev co sab nraud, thiab ob -theem ntws yuav tsum raug ntsuas rau qhov xaiv qhov loj thiab tsim.
Vortex Flow Meters
Lub vortex meter tso lub cev bluff ruaj khov rau hauv txoj kev ntws. Alternating vortices tsim downstream thaum cov kua dej hla lub cev bluff. Lub vortex shedding zaus muaj feem xyuam rau cov dej tshaj tawm nyob rau hauv qhov ntsuas qhov kev ua haujlwm.
Vortex flowmeterfeem ntau suav hais tias yog cov pa, gases, thiab cov kua dej huv. Nrog rau qhov tsim nyog siab thiab qhov kub thiab txias inputs, qee lub tshuab tuaj yeem suav cov nyiaj them poob haujlwm lossis lub zog ntws.
Zoo tshaj plaws rau:cov khoom siv hluav taws xob, cov pa roj compressed, thiab cov txheej txheem huv cov kua uas muaj qhov nrawm txaus.
Qhov tseem ceeb txwv:Tsawg tshaj tawm, kev vibration ntau dhau, pulsation, cov yeeb nkab tsis zoo, thiab cov chav ntub dej tuaj yeem txo qhov ntsuas kev ntseeg tau.
Turbine Flow Meters
Ib lub turbine meter tso lub rotor hauv cov dej ntws. Hloov cov kua dej tig lub rotor, thiab cov khoom siv hlau nplaum los yog hluav taws xob ntes tau txhua qhov hlais. Nyob rau hauv lub calibrated kev khiav hauj lwm ntau yam, rotor zaus muaj feem xyuam rau volumetric txaus.
Liquid turbine flow metertuaj yeem muab cov lus teb ceev ceev thiab siab - daws teeb meem mem tes kom huv, qis - kua viscosity.
Zoo tshaj plaws rau:Cov kua dej huv, hloov roj, cov khoom siv kuaj, thiab cov txheej txheem uas yuav tsum tau muaj cov zis tawm los yog cov lus teb ceev.
Qhov tseem ceeb txwv:Kev hloov pauv viscosity, kev sib kis, kev coj tus kheej, kev cuam tshuam ntws, thiab kev ua haujlwm hauv qab no tuaj yeem hloov pauv qhov ntsuas ntsuas.
Positive Displacement Flow Meters
Lub ntsuas qhov ntsuas qhov zoo rov ua dua thiab tso cov kua dej uas paub txog. Oval gears, pistons, vanes, lossis lwm yam txav tau faib cov ntws mus rau hauv qhov ntsuas tau nce ntxiv. Lub 'meter' suav cov voj voog ua tiav los suav cov ntim ntim thiab ntim tag nrho.
Lub hauv paus ntsiab lus no tsis xav kom lub 'meter' infer ntws los ntawm nruab nrab cov yeeb nkab tshaj tawm. Iboval iav flow meter, piv txwv li, ncaj qha suav cov kua ntws tawm.
Zoo tshaj plaws rau:viscous oils, fuels, resins, lubricants, low-flow kua ntsuas, thiab batching.
Qhov tseem ceeb txwv:Cov khoom txav sab hauv tsim kev poob siab thiab tej zaum yuav raug puas los ntawm cov khib nyiab, abrasive contamination, gas hnab ris, los yog tsis txaus pom.
Thermal Mass Flow Meters
Ib lub thermal mass meter tso ib qho kev ntsuas cua sov hauv cov dej ntws. Flowing gas tshem tawm cua sov ntawm lub sensor. Cov cuab yeej ntsuas qhov kub poob lossis lub zog yuav tsum tau ua kom muaj qhov sib txawv ntawm qhov kub thiab txias thiab cuam tshuam rau huab cua ntws.
Thermal huab cua flowmeteryog dav siv rau compressed cua, nitrogen, combustion gases, aeration systems, thiab industrial gas- saib xyuas kev noj haus.
Zoo tshaj plaws rau:cov pa roj huv huv uas paub zoo thiab muaj txiaj ntsig ruaj khov.
Qhov tseem ceeb txwv:Cov kev hloov pauv hauv cov roj muaj pes tsawg leeg, noo noo, condensation, deposits, thiab ntws profile tuaj yeem hloov cov cua sov-hloov kev sib raug zoo tsim thaum lub sij hawm calibration.
Variable Area Flow Meters
Ib qho kev ntsuas thaj tsam sib txawv, feem ntau hu ua rotameter, siv lub ntab hauv ib lub raj xaim. Flow lifts lub ntab kom txog thaum cov dej quab yuam, buoyancy, thiab lub ntiajteb txawj nqus mus txog equilibrium. Lub float txoj hauj lwm sib raug mus rau calibrated flow rate.
Zoo tshaj plaws rau:yooj yim hauv zos qhia thiab kuj tsis tshua muaj kua los yog roj ntws.
Qhov tseem ceeb txwv:ib txwm rotameters yuav tsum tau muab ntsia rau hauv qhov kev taw qhia, thiab qhov ntsuas nyob ntawm cov kua dej ntom ntom, viscosity, siab, kub, thiab qhov nruab nrab calibration.
Flow Meter Technology Sib Piv
| Technology | Thawj qhov ntsuas ntsuas | Yam tshwm sim | Common thov haum | Kev txwv tseem ceeb |
|---|---|---|---|---|
| Differential siab | Siab sib txawv | Muab xam ntim los yog loj txaus | Kua, gases, chav | Siab poob thiab installation complexity |
| Electromagnetic | Induced voltage | Volumetric ntws | Conductive kua thiab slurries | Tsis tuaj yeem ntsuas tsis yog -cov kua dej conductive |
| Ultrasonic | Kev thauj mus los - lub sijhawm sib txawv lossis Doppler hloov | Volumetric ntws | Cov kua dej, xaiv cov pa roj, ntsuas kev ntsuas rov qab | Acoustic txoj kev thiab kev teeb tsa |
| Coriolis | Vibrating{0}}tube teb | Direct huab cua ntws | Batching, ceev, siab -kua dej | Tus nqi, siab poob, qhov hnyav, ob-theem ntws |
| Vortex | Vortex shedding zaus | Volumetric los yog compensated flow | Chav, gases, huv si kua | Tsawg tshaj tawm thiab kev vibration rhiab heev |
| Turbine | Rotor zaus | Volumetric ntws | Ntxuav, tsawg - kua viscosity | Tsiv qhov chaw thiab viscosity rhiab heev |
| Kev hloov pauv zoo | Suav cov ntim ruaj khov | Direct volumetric ntws | Cov kua viscous thiab qis ntws | Kev poob siab, kev sib kis, kev siv tshuab |
| Thermal huab hwm coj | Thaum tshav kub kub hloov | Nthuav dav | Industrial gases thiab compressed cua | Gas muaj pes tsawg leeg, noo noo, thiab deposits |
| Thaj chaw sib txawv | Float position | Volumetric ntws | Local low -flow indication | Fluid-cov khoom thiab cov kev taw qhia |
Kev siv thev naus laus zis- theem kev sib piv muab qhov pib muaj txiaj ntsig, tab sis lawv tsis hloov tus qauv- kev pov thawj tshwj xeeb. Ob metres siv tib txoj kev ntsuas yuav muaj qhov sib txawv ntawm qhov sib txawv, qhov tseeb, cov khoom siv, kev kuaj mob, ntawv pov thawj, thiab cov kev xav tau ntawm kev teeb tsa.
Rau ob qho kev sib piv ua kua technologies, saib cov ncauj lus kom ntxawsUltrasonic tiv thaiv electromagnetic flowmeter.
Qhov tseeb, rov ua dua, thim rov qab, thiab tsis paub tseeb
Cov ntsiab lus no feem ntau siv sib hloov, tab sis lawv piav txog ntau yam ntawm kev ntsuas kev ua tau zoo.
Qhov tseeb
Qhov tseeb piav qhia tias ze npaum li cas tus nqi qhia yuav tsum yog rau tus nqi siv raws li cov xwm txheej tau teev tseg. Nco ntsoov xyuas seb qhov kev qhia tshwj xeeb sau li cas.
Ib qho kev qhia tshwj xeeb qhia raws li qhov feem pua ntawm kev nyeem ntawv coj txawv ntawm ib qho qhia raws li feem pua ntawm tag nrho cov nplai. Rau ib qho cuab yeej nrog 100-unit puv nplai:
- Ntawm 10 units, ± 0.5% ntawm kev nyeem ntawv sib npaug ± 0.05 units.
- Ntawm 10 units, ± 0.5% ntawm tag nrho cov nplai sib npaug ± 0.5 units.
Qhov sib txawv ua qhov tseem ceeb ntawm qhov qis kawg ntawm qhov ntsuas qhov ntsuas.
Rov ua dua
Repeatability piav qhia qhov ze ze ntawm lub 'meter' reproduces tib qhov tshwm sim thaum tib yam xwm txheej raug rov ua dua. Ib lub 'meter' tuaj yeem ua tau ntau dua tab sis tsis tu ncua kev sib tw. Zoo repeatability tsis tshem tawm qhov yuav tsum tau rau calibration kom raug thiab installation.
Turndown Ratio
Turndown yog qhov piv ntawm qhov siab tshaj plaws thiab qhov tsawg kawg nkaus siv tau ntws. Ib lub 'meter' muaj peev xwm ntsuas los ntawm 10 mus rau 1,000 units muaj qhov nominal 100: 1 turndown.
Txawm li cas los xij, qhov ntsuas ntsuas qhov ntsuas yuav tsis muab tib qhov tseeb, rov ua dua, lossis cov lus teb ntawm txhua qhov chaw. Qhov xav tau yam tsawg kawg nkaus, qhov qub, thiab qhov siab tshaj plaws yuav tsum tau muab piv nrog cov chaw tsim khoom cov kev ua haujlwm tshwj xeeb es tsis yog nrog ib tus nqi them rov qab.
Kev ntsuas tsis meej
Tag nrho qhov system tsis paub meej yuav suav nrog ntau tshaj qhov ntsuas ntsuas qhov tseeb tshaj tawm. Nws tseem tuaj yeem suav nrog:
- Calibration tsis paub meej
- Rov ua dua
- Kev ntsuas kub thiab ntsuas kub
- Qhov ntom los yog muaj pes tsawg leeg assumption
- Cov yeeb nkab qhov ntev
- Flow-cov teebmeem profile
- Kev ua cov teeb liab
- Ntev - lub sij hawm drift
- Installation thiab configuration yuam kev
Rau kev qhia txog cov txheej txheem, qhov kev ntsuam xyuas dav dav tsis paub meej yuav txaus. Kev hloov mus rau kev saib xyuas, kev ntsuas hauv chav kuaj, kev tshaj tawm kev tswj hwm, lossis qib siab -cov nqi sib tw yuav xav tau cov ntaub ntawv tsis paub tseeb txog nyiaj txiag.
Yuav Ua Li Cas Loj Flow Meter?
Ib tug flow meter yuav tsum tsis txhob xaiv los ntawm nominal yeeb nkab loj ib leeg. Lub 'meter' yuav tsum ua haujlwm nyob rau hauv qhov tsim nyog tshaj tawm thiab ntsuas ntau yam thaum lub sij hawm yam tsawg kawg nkaus, qhov qub, thiab cov txheej txheem siab tshaj plaws.
1. Tsim kom muaj qhov dej ntws tiag tiag
Sau qhov tsawg kawg nkaus, ib txwm, siab tshaj, pib, tu, thiab thim rov qab- cov xwm txheej ntws. Tsis txhob ua qhov ntsuas qhov ntsuas uas siv lub peev xwm twj tso kua mis ib leeg yog tias kev ua haujlwm ib txwm qis dua.
2. Sib piv Flow nrog lub ntsuas ntsuas qhov ntsuas
Txheeb xyuas tus qauv - tshwj xeeb yam tsawg kawg nkaus thiab qhov siab tshaj plaws ntws txwv. Tsawg ntws yuav poob qis dua qhov siv tau cov teeb liab ntawm lub vortex lossis turbine meter. Kev tshaj tawm ntau dhau tuaj yeem tsim kev poob siab, kev vibration, kev pheej hmoo ntawm cavitation, yaig, los yog tawm ntawm - ntawm - ntau yam mob.
3. Ntsuas ntsuas qhov loj me cais los ntawm cov yeeb nkab loj
Hauv qee qhov kev siv, qhov ntsuas qhov tseeb yuav me dua li cov yeeb nkab uas twb muaj lawm. Txo qhov ntsuas qhov loj tuaj yeem nce qhov nrawm thiab txhim kho qis - ntws kev ua haujlwm, tab sis nws kuj ua rau kom poob siab thiab tej zaum yuav xav tau cov reducers thiab cov yeeb nkab ncaj nraim.
Rau lwm cov thev naus laus zis, hloov txoj kab uas hla yuav tsis tsim nyog lossis tsis xav tau. Qhov kev txiav txim siab yuav tsum yog raws li cov txheej txheem ntws, tso cai poob siab, thev naus laus zis, thiab cov lus qhia kev teeb tsa.
4. Tshawb xyuas qhov poob siab
Orifice daim hlau, turbine meters, qhov zoo hloov chaw ntsuas, vortex bluff lub cev, me Coriolis hlab, strainers, thiab undersized meters yuav ntxiv siab poob. Kev sib dhos ua tiav yuav tsum tau txiav txim siab tsis yog ntsuas lub sensor ib leeg.
5. Paub meej tias kev ua tau zoo ntawm cov dej ntws li qub
Qhov chaw ua haujlwm ib txwm yuav tsum zaum hauv qhov chaw ruaj khov ntawm qhov ntsuas qhov ntau. Xaiv ib lub 'meter' uas tsuas yog ua tau zoo nyob ze qhov siab tshaj plaws yuav tsim cov txiaj ntsig tsis zoo thaum lub sijhawm ua haujlwm feem ntau.
Yuav Ua Li Cas Xaiv Txoj Cai Flow Meter?
Cov txheej txheem xaiv muaj txiaj ntsig tshem tawm cov thev naus laus zis tsis sib xws ua ntej muab piv rau cov nqi lossis qhov tseeb ntawm cov xov xwm. Qhov chaw qhia ntawv rauyuav ua li cas xaiv ib tug haum flow metertuaj yeem txhawb nqa kev tshuaj xyuas daim ntawv thov kom ntxaws.
Kauj Ruam 1: Txhais cov kua dej
- Puas yog kua, roj, lossis chav dej?
- Puas yog conductive?
- Puas yog qhov ceev lossis viscosity hloov?
- Nws puas muaj npuas, khoom, fibers, los yog tee dej?
- Puas yog corrosive, abrasive, tshuaj lom, huv si, lossis muaj kev phom sij?
- Nws puas tuaj yeem crystallize, tsho tiv no, polymerize, los yog solidify?
Kauj Ruam 2: Txhais qhov ntsuas yuav tsum tau ua
- Volumetric ntws
- Direct huab cua ntws
- Txheem roj ntim
- Totalized kom muaj nuj nqis
- Qhov ntom
- Kub
- Lub zog khiav
Kev ntsuas huab cua ncaj qha yuav zoo dua rau kev tsim los yog qhov sib npaug loj. Lub ntsuas ntsuas ntsuas yuav txaus rau cov dej ncig lossis kev saib xyuas cov txheej txheem dav dav.
Kauj Ruam 3: Tshem Tawm Cov Tshuab Tsis Zoo
| Daim ntawv thov mob | Technology cuam tshuam |
|---|---|
| Tsis yog -cov kua ua kua | Tshem tawm cov qauv ntsuas electromagnetic. |
| Cov yeeb nkab tsis tuaj yeem raug txiav lossis kev tsim khoom tsis tuaj yeem nres | Xav txog qhov clamp- ntawm cov tshuaj ultrasonic yog tias cov yeeb nkab thiab cov kua dej txhawb nqa txoj hauv kev acoustic. |
| Yuav tsum muaj huab cua ncaj qha | Xav txog Coriolis rau cov kua los yog roj, los yog thermal loj rau cov roj uas tsim nyog. |
| Dirty conductive kua los yog slurry | Kev ntsuas hluav taws xob tuaj yeem tsim nyog yog tias cov ntaub ntawv liner thiab cov khoom siv electrode sib haum. |
| viscous kua ntawm tsawg ntws | Kev hloov pauv zoo lossis kev ntsuas Coriolis tuaj yeem tsim nyog. |
| Chav ua haujlwm | Kev ntsuas vortex lossis qhov sib txawv ntawm qhov ntsuas siab feem ntau yog ntsuas. |
| Cov kua dej muaj cov khoom abrasive | Tsis txhob siv cov thev naus laus zis nrog cov khoom txav tsis yooj yim tshwj tsis yog tias tus qauv tsim tshwj xeeb rau kev pabcuam. |
Kauj Ruam 4: Saib xyuas cov kev txwv kev teeb tsa
- Cov yeeb nkab puas tuaj yeem raug txiav?
- Cov txheej txheem tuaj yeem nres?
- Puas yog cov yeeb nkab ib txwm puv?
- Puas muaj cov yeeb nkab ncaj txaus?
- Puas yog lub twj tso kua mis, lub valve, lub luj tshib, lossis cov reducers ze rau lub ntsuas?
- Puas yog cov yeeb nkab kab rov tav lossis ntsug?
- Puas muaj kev vibration, pulsation, hluav taws xob cuam tshuam, lossis kev ntxhov siab ntawm txhua yam?
- Puas muaj kev nkag tau txaus rau kev ua haujlwm thiab kev saib xyuas?
Kauj Ruam 5: Txhais cov kev xav tau ua haujlwm
- Yuav tsum muaj qhov tseeb thiab rov ua dua
- Yam tsawg kawg nkaus thiab siab kawg ntws
- Teb sijhawm
- Kev ntsuas bidirectional
- Tsawg- kev ua haujlwm ntws
- Calibration thiab traceability
- Kev them nqi, kev saib xyuas-hloov, lossis kev cai tswj hwm
Kauj Ruam 6: Paub meej cov ntaub ntawv thiab kev pom zoo
Txheeb xyuas cov txheej txheem kev sib txuas, kev ntsuas siab, lub cev, liner, electrodes, ntsuas cov raj, cov ntsaws ruaj ruaj, iav, rotor, thiab tag nrho cov ntaub ntawv ntub dej. Kuj paub meej tias muaj kev phom sij - thaj chaw, huv, dej haus - dej, lossis lwm yam kev pom zoo uas xav tau.
Kauj Ruam 7: Txheeb xyuas cov txiaj ntsig thiab cov nqi ntawm lub neej
Lub 'meter' yuav tsum sib txuas lus nrog cov kev tswj hwm uas twb muaj lawm. Paub meej tias lub hwj chim mov, zaub, 4-20 mA, mem tes, tswb, HART, RS485 Modbus, cov ntaub ntawv logging, thiab tej thaj chaw deb diagnostic yuav tsum.
Tus nqi ntawm lub neej tuaj yeem suav nrog kev teeb tsa, kaw, siab- cuam tshuam txog kev poob hluav taws xob, kev txheeb xyuas, kev ntsuas, kev tu, cov khoom seem, kev daws teeb meem, thiab kev pabcuam lub neej. Qhov kev yuav khoom kim tshaj plaws tsis yog qhov ntsuas qis tshaj plaws.
Kev xaiv ua haujlwm piv txwv: Txias -Dej Retrofit
Cov piv txwv hauv qab no qhia txog cov txheej txheem xaiv. Nws tsis yog nthuav tawm raws li tus neeg siv khoom lossis hloov pauv rau tus qauv- kev tshuaj xyuas tshwj xeeb engineering.
- Kua dej:dej txias kom huv
- Cov yeeb nkab:DN200 carbon hlau
- Flow range:50-450 m³ / h
- Kev ntsuas lub hom phiaj:kev saib xyuas lub zog thiab kev ua haujlwm pov thawj
- Txheej txheem kaw:tsis muaj
- Cov yeeb nkab txiav:tsis tso cai
- Yuav tsum tau outputs:4-20 mA thiab RS485
- Muaj installation:nkag tau tag nrho cov yeeb nkab nrog ib tug usable ncaj seem
Cov neeg sib tw Technologies
Ib lub tshuab hluav taws xob electromagnetic tuaj yeem ntsuas cov dej txias txias nrog qhov poob siab, tab sis tus qauv inline yuav tsum txiav cov yeeb nkab thiab nres cov txheej txheem.
Lub turbine meter tseem yuav xav tau kev teeb tsa hauv kab thiab qhia cov khoom txav. Lub Coriolis meter yuav muab cov dej ntws ncaj qha tab sis feem ntau yuav nyuaj rau kev pom zoo rau DN200 retrofit tsom rau kev saib xyuas hluav taws xob.
A clamp- ntawm ultrasonic flow meterdhau los ua qhov chaw pib siv tau vim tias cov sensors tuaj yeem ntsia tau sab nraum cov yeeb nkab uas twb muaj lawm.
Yuav Tsum Tau Paub Txog Dab Tsi?
- Qhov tseeb sab nraud txoj kab uas hla thiab phab ntsa thickness
- Cov khoom siv yeeb nkab thiab cov khoom siv sab hauv
- Deg corrosion los yog txheej txheej
- Dej kub
- Kev ua haujlwm puv - yeeb nkab
- Muaj cov kav dej sab saud thiab hauv qab
- Sensor mounting txoj hauj lwm
- Lub teeb liab lub zog thiab teeb liab zoo tom qab kev teeb tsa
- Yuav tsum muaj qhov tseeb raws li qhov tseeb ntws profile
Qhov piv txwv qhia tau hais tias yog vim li cas qhov kev txwv ntawm daim ntawv thov tuaj yeem txiav txim siab ntau dua li qhov ntsuas ntsuas qhov tseeb. Cov cuab yeej siv tau raug xaiv vim nws haum rau ob qho tib si dej thiab kev teeb tsa, tsis yog vim nws yog universally superior.
Installation Conditions uas yuav override Meter raug
Ib lub meter uas raug xaiv tseem tuaj yeem tsim cov ntaub ntawv tsis muaj kev ntseeg siab thaum kev teeb tsa kev teeb tsa txawv ntawm cov siv rau kev ntsuas los yog teev los ntawm cov chaw tsim khoom.
Disturbed Flow Profile
Lub luj tshib, twj tso kua mis, tswj li qub, tees, reducers, thiab qee qhov qhib li qub tuaj yeem tsim kev swirl lossis qhov tsis sib xws ntawm qhov nrawm. Lub siab sib txawv, vortex, turbine, ultrasonic, thiab lwm yam tshaj tawm - cov thev naus laus zis tuaj yeem nkag siab rau cov kev cuam tshuam no.
Txheeb xyuas tus qauv- cov lus qhia tshwj xeeb thiab lub vev xaib piav qhia ntawmupstream thiab downstream ncaj - yeeb nkab yuav tsum. Ib txoj cai ncaj nraim- khiav yuav tsum tsis txhob hloov cov chaw tsim khoom tsim cov qauv tsim.
Ib nrab ntim cov yeeb nkab
Ntau lub ntsuas kua yuav tsum muaj lub ntsuas ntsuas tag nrho. Cov hnab ris huab cua lossis cov yeeb nkab ib nrab hloov pauv qhov chaw ntws zoo thiab tuaj yeem cuam tshuam cov electrodes lossis ultrasonic txoj kev.
Kev teeb tsa ntawm qhov taw tes qis, nce siab ntsug, lossis lwm qhov chaw uas tseem tshuav yuav txo tau qhov kev pheej hmoo no, raws li lub ntsuas hluav taws xob cov lus qhia.
Npuas, Khoom, thiab Ob -Phase Flow
Entrained gas, particles, droplets, los yog hloov theem faib yuav cuam tshuam cov technologies txawv. Cov npuas tuaj yeem cuam tshuam kev thauj mus los- lub sijhawm ultrasonic teeb liab, ua kom Coriolis tsav nce, lossis ua kom tsis ruaj khov. Cov khoom yuav coated electrodes thiab thermal sensors los yog puas turbine thiab hloov chaw.
Qhov concentration, particle loj, npuas loj, kev faib tawm, thiab kev sib txawv yog feem ntau muaj txiaj ntsig zoo dua li cov lus yooj yim uas cov kua dej "dub paug."
Configuration tsis raug
Clamp- ntawm cov cuab yeej ultrasonic yuav xav tau cov yeeb nkab txoj kab uas hla, phab ntsa tuab, cov khoom siv yeeb nkab, cov ntaub ntawv liner, hom sensor, cov ntaub ntawv dej, thiab txoj kev txuas. Kev suav roj yuav xav tau qhov raug siab, qhov kub thiab txias, muaj pes tsawg leeg, thiab siv cov xwm txheej.
Tus nqi ruaj khov uas tsim los ntawm kev teeb tsa tsis raug tseem yog tus nqi tsis raug.
Grounding thiab hluav taws xob nrov
Sib nqus meters yuav tsum muaj tseeb grounding los yog muaj peev xwm sib npaug raws li lawv tsim. Cov teeb liab cables yuav tsum raug xa mus raws li cov chaw tsim khoom cov lus qhia thiab sib cais los ntawm cov khoom siv hluav taws xob cuam tshuam qhov xav tau.
Vibration thiab Mechanical Stress
Kev co sab nraud tuaj yeem cuam tshuam rau Coriolis thiab vortex ntsuas, thaum cov yeeb nkab tsis zoo yuav ua rau muaj kev ntxhov siab rau hauv cov meters. Pulsating twj tso kua mis kuj tuaj yeem tsim kev hloov pauv sai heev uas tshaj qhov muaj peev xwm teb tau ntawm cov cuab yeej xaiv.
Cov tsos mob tshwm sim, Cov tsos mob tshwm sim, thiab kuaj xyuas
| Pom cov tsos mob | Ua tau | Yuav kuaj li cas |
|---|---|---|
| Kev nyeem ntawv ruaj khov uas tsis pom zoo nrog cov txheej txheem | Cov yeeb nkab tsis raug, kua dej, ntsuas, lossis siv cov ntaub ntawv -cov ntaub ntawv | Configuration, units, pipe dimensions, K-factor, ntom, siab, thiab kub inputs |
| Nrov nrov los yog fluctuating flow | Kev cuam tshuam tsis txaus, npuas, pulsation, hluav taws xob nrov, lossis teeb liab tsis zoo | Valve thiab twj tso kua mis qhov chaw, tag nrho - yeeb nkab mob, teeb liab kuaj, grounding, thiab damping |
| Flow tseem nyob ntawm xoom | Tsawg-flow cutoff, khoob yeeb nkab, tsis ua hauj lwm sensor, tsis raug thaiv, los yog ntws hauv qab qhov tsawg kawg nkaus | Diagnostic tswb, sensor signals, thaiv, txheej txheem mob, thiab configured cutoff |
| Kev nyeem ntawv hloov tom qab kho | Sensor txoj hauj lwm, kev taw qhia, xoom qhov chaw, cov ntaub ntawv yeeb nkab, lossis xaim hloov pauv | Cov ntaub ntawv commissioning, sensor spacing, installation marks, xoom txheej txheem, thiab parameter backup |
| Kev ua yuam kev ntau zuj zus tuaj | Txheej, hnav, corrosion, drift, blocked impulse kab, lossis txheej txheem - hloov khoom vaj khoom tsev | Kev tshuaj xyuas keeb kwm, kev txheeb xyuas cov txiaj ntsig, qhov ntsuas lub cev, lub zog xa dej, thiab cov khoom ua kua dej |
Calibration, Verification, thiab Zero Check
Cov dej num no muaj feem cuam tshuam, tab sis lawv tsis hloov pauv.
Calibration
Calibration piv cov ntsuas qhov taw qhia nrog tus qauv siv raws li kev tswj xyuas thiab cov ntaub ntawv kev sib raug zoo ntawm qhov taw qhia thiab siv qhov tseem ceeb.
NIST piav qhia txog cov kua dej calibration tshuab uas txiav txim siab siv cov dej ntws siv dynamic gravimetric ntsuas, qhov twg cov dej ntim tau ntsuas lub sijhawm. Saib cov lus piav qhia ntawm lubNIST kua flow standard.
Calibration tsis tuaj yeem kho lub ntsuas qhov tshwj tsis yog tias qhov kev hloov kho cais tau ua tiav thiab sau tseg.
Kev pov thawj
Kev txheeb xyuas xyuas seb lub ntsuas puas tseem ua tau raws li qhov kev lees paub tau tsim. Nws tuaj yeem siv tus ntsuas ntsuas, tsim- hauv kev kuaj mob, kev siv nqa tau yooj yim, pov thawj, tus txheej txheem sib npaug, lossis lwm txoj kev pom zoo.
Kev sib piv ntawm thaj chaw tuaj yeem txheeb xyuas qhov sib txawv tseem ceeb, tab sis nws qhov kev txiav txim siab tsuas yog txwv los ntawm qhov tsis paub tseeb thiab kev teeb tsa zoo ntawm ob lub 'meter' hauv kev sim thiab siv.
Zero Check
Kev kuaj xoom ntsuas qhov qhia tau tias ntws thaum qhov xav tau tsis muaj -flow condition tau raug tsim. Cov txheej txheem raug yog tshuab- thiab qauv- tshwj xeeb.
Rau ntau cov kua ntsuas, zeroing yuav tsum muaj cov yeeb nkab tag nrho nrog cov kua dej nyob ruaj ruaj. Cov yeeb nkab khoob tsis yog qhov siv tau xoom- ntws siv. Valves, thermal convection, leakage, vibration, los yog cov pa roj tuaj yeem ua rau pom tseeb tias tsis muaj - dej ntws tsis zoo.
Rau cov kauj ruam npaj ntxiv, tshuaj xyuas lub xaibFlow meter calibration ntaub ntawv.
Ntev npaum li cas yuav tsum ntsuas Flow Meter?
Tsis muaj universal interval. Lub sij hawm yuav tsum xav txog:
- Txheej txheem txaus ntshai
- Kev tswj hwm lossis cov neeg siv khoom xav tau
- Kev ntsuas tus nqi
- Keeb kwm drift
- Cov kua dej
- Meter technology
- Kev ua haujlwm hnyav
- Cov txiaj ntsig kev pov thawj dhau los
- Yuav tsum muaj kev paub tsis meej
Ib qho kev pheej hmoo-raws li lub sijhawm txhawb nqa los ntawm cov ntaub ntawv keeb kwm muaj kev tiv thaiv ntau dua li siv ib lub sijhawm teem tseg rau txhua lub meter.
Feem ntau Misconceptions txog Flow Meters
"Tag nrho cov Flow Meters Measure Velocity"
Lawv tsis ua. Coriolis meters ntsuas huab hwm coj ncaj qha, qhov ntsuas qhov ntsuas qhov zoo suav suav paub qhov ntim, thiab ntsuas cua sov ntsuas ntsuas ntsuas kub hloov pauv.
"Lub Meter nrog qhov tseeb tshaj plaws yog qhov zoo tshaj plaws"
Lub chaw soj nstuam siab tsis tuaj yeem them nyiaj rau cov kua dej tsis sib xws, qhov tsis zoo ntawm qhov loj me, cov yeeb nkab ncaj tsis txaus, tsis ruaj khov theem, lossis tsis raug teeb tsa.
"Cov yeeb nkab loj txaus los xaiv ib lub 'meter'
Kev xaiv kuj yuav tsum muaj qhov tsawg kawg nkaus, ib txwm, thiab siab tshaj plaws ntws, siab, kub, dej zog, kev teeb tsa, cov khoom siv, cov khoom tsim tawm, thiab cov hom phiaj ua haujlwm.
"Ib Clamp-Ntawm Meter Tsis Muaj Kev Txhim Kho"
Sab nraud sensors zam tsis txhob txiav cov yeeb nkab, tab sis cov ntaub ntawv yeeb nkab raug, kev npaj nto, acoustic coupling, sensor txoj hauj lwm, qhov sib nrug, ntws profile, thiab teeb liab kev kuaj mob tseem ceeb heev.
"Kev nyeem ntawv ruaj khov yuav tsum raug"
Configuration yuam kev, xoom offset, txheej, ntom ntom, tsis raug K-factor, tsis zoo yeeb nkab qhov ntev, thiab calibration bias tuaj yeem tsim cov nqi ruaj khov tab sis tsis raug.
Cov lus nug nquag
Q: Qhov txawv ntawm Flow Meter thiab Flow Sensor yog dab tsi?
A: Lub ntsuas dej ntws yog lub ntsiab lus uas kuaj pom qhov ntws - ntsig txog lub cev teb. Flow meter feem ntau yog hais txog kev ntsuas ua tiav, uas tuaj yeem suav nrog lub sensor, transmitter, zaub, totalizer, outputs, thiab kuaj mob. Lub terminology txawv ntawm manufacturers.
Q: Puas yog Flow Meter Ntsuas Siab?
A: Lub ntsuas ntsuas ntsuas ntws, tab sis qhov sib txawv ntawm qhov sib txawv siv lub siab sib txawv raws li qhov ntsuas nruab nrab. Lub tshuab xa hluav taws xob ib leeg tsis tuaj yeem muab kev ntseeg tau txaus tshwj tsis yog nws tau ua ke nrog cov ntsiab lus tseem ceeb, cov ntaub ntawv dej, thiab kev suav.
Q: Qhov ntsuas Flow twg tsim kom muaj qhov poob siab tshaj plaws?
A: Ib lub ntsuas hluav taws xob sab nraud uas tsis muaj kev cuam tshuam hauv cov yeeb nkab thiab yog li ntawd ntxiv tsis muaj qhov ntsuas ntsuas - ntsig txog qhov poob siab rau cov txheej txheem. Tag nrho -bore magnetic meters kuj feem ntau qhia me ntsis kev poob mus tas li thaum ntsia tsis tas yuav txo qis hauv txoj kab uas hla.
Q: Tib Qhov Flow Meter puas tuaj yeem ntsuas cov kua thiab roj?
A: Qee cov qauv ntsuas tuaj yeem tsim los rau cov kua dej thiab cov pa roj, tab sis cov qauv tshwj xeeb, kev teeb tsa, qhov loj me, thiab ntsuas ntsuas siv rau cov kev tshaj tawm thiab kev ua haujlwm. Ib lub 'meter' yuav tsum tsis txhob raug xa mus ntawm cov kev pabcuam tsis cuam tshuam yam tsis muaj kev lees paub engineering.
Q: Lub ntsuas dej twg zoo tshaj plaws rau dej?
A: Tsis muaj ib lo lus teb. Conductive full- yeeb nkab dej yuav haum rau lub ntsuas magnetic. Ib qho retrofit qhov twg cov yeeb nkab tsis tuaj yeem txiav tuaj yeem haum rau kev thauj mus los - lub sijhawm ntsuas ultrasonic. Ntxuav tsawg- cov dej ntws tuaj yeem haum rau turbine, ultrasonic, lossis lwm tus qauv- cov cuab yeej tshwj xeeb. Cov dej khib nyiab thiab slurry tej yam kev mob yuav tsum tau cais kev soj ntsuam.
Q: Puas tuaj yeem ntsuas tau ib ntus?
A: Yog. Portable ultrasonic flow meter yuav pab tau rau kev soj ntsuam, kev txheeb xyuas, ntsuas, thiab kev daws teeb meem ib ntus thaum cov yeeb nkab thiab cov kua dej txhawb nqa kev ntsuas acoustic txhim khu kev qha.
Q: Cov ntaub ntawv dab tsi xav tau rau Flow Meter Quotation?
A: Lub npe ntawm cov kua dej thiab muaj pes tsawg leeg
Kua, roj, los yog chav
Yam tsawg kawg nkaus, ib txwm, thiab siab kawg ntws
Cov yeeb nkab loj thiab lub sijhawm
Tsawg kawg thiab siab tshaj plaws
Yam tsawg kawg thiab siab kawg kub
Qhov ceev, viscosity, thiab conductivity thaum muaj feem xyuam
Khoom, npuas, tee, los yog noo noo
Yuav tsum muaj qhov tseeb thiab rov ua dua
Kev sib txuas, cov ntaub ntawv, thiab kev ntsuas siab
Fais fab mov thiab tso zis teeb liab
Kev txwv kev teeb tsa
Kev puas tsuaj - cheeb tsam, kev huv huv, lossis kev tswj hwm
Q: Tus nqi Flow Meter Ntau npaum li cas?
A: Tus nqi yog nyob ntawm kev siv tshuab, qhov loj me, cov khoom siv, kev ntsuas siab, qhov kub thiab txias, qhov tseeb, kev pom zoo, cov zis, kev kuaj mob, kev sib txuas, kev ntsuas, thiab kev teeb tsa. Cov nqi ntawm lub neej xws li kev kaw, kev poob siab, kev saib xyuas, thiab kev txheeb xyuas yuav tsum muab piv nrog tus nqi yuav khoom.
Xaus
Flow meter hloov cov lus teb lub cev tsim los ntawm kev txav cov kua mus rau hauv qhov ntsuas dej siv tau. Cov lus teb yuav yog qhov sib txawv ntawm qhov sib txawv, induced voltage, acoustic mus ncig teb chaws lub sij hawm, vortex zaus, rotor ceev, displaced ntim, hloov tshav kub, los yog vibrating - raj suab.
Kev nkag siab txog lub hauv paus ntsiab lus ntawm kev ua haujlwm pab piav qhia tias vim li cas ib lub tshuab ua haujlwm tau zoo hauv ib daim ntawv thov thiab tsis zoo hauv lwm qhov. Kev xaiv zaum kawg yuav tsum xav txog cov kua dej, ntsuas lub hom phiaj, ntws ntau yam, siab, qhov kub thiab txias, kev teeb tsa, siab poob, cov khoom siv, qhov tseeb, kev hloov pauv, cov zis tawm, calibration, thiab lifecycle cost.
Ua ntej xaiv tus qauv, npaj cov ntaub ntawv thov kom tiav thiab sib piv cov kev ua haujlwm nrog cov chaw tsim khoom cov lus pom zoo. Rau qhov project-kev ntsuas tshwj xeeb, xa cov ntaub ntawv txheej txheem los ntawmflow meter nug daim ntawv.
