Flow ntsuas txiav txim siab tus nqi lossis tag nrho cov khoom ntawm cov kua, roj, lossis chav txav los ntawm cov txheej txheem. Xaiv lub ntsuas dej zoo yuav tsum muaj ntau tshaj qhov sib piv cov cuab yeej mus rau lub nominal yeeb nkab txoj kab uas hla. Qhov yuav tsum tau ntsuas qhov sib txawv, cov kua dej, qhov tsawg kawg nkaus thiab siab tshaj plaws, kev teeb tsa kev teeb tsa, kev poob siab, qhov tseeb txhais, kev saib xyuas, thiab tag nrho cov nqi ntawm lub neej yuav tsum tau soj ntsuam.
Txoj cai xaiv cov tswv yim yog ncaj nraim: ua ntej txheeb xyuas qhov yuav tsum tau ntsuas, tom qab ntawd tshem tawm cov thev naus laus zis uas tsis tuaj yeem tuav cov kua dej lossis kev teeb tsa, thiab tsuas yog tom qab ntawd sib piv cov ntsuas qhov loj me, kev ua tau zoo, cov zis, thiab cov nqi. Ib qho davindustrial flow meter khoom ntau yamyog pab tau tsuas yog tom qab cov txheej txheem no tau tsim.
Teb ceev:Siv lub ntsuas hluav taws xob sib nqus rau ntau cov kua hluav taws xob, lub clamp- ntawm lub ntsuas ntsuas ultrasonic thaum cov yeeb nkab tsis tuaj yeem raug txiav, lub vortex lossis qhov sib txawv- lub zog rau ntau qhov kev siv chav dej, lub ntsuas cua kub kom haum rau cov pa huv si, lub ntsuas cua turbine kom huv si qis- cov kua dej viscosity, thiab qhov zoo ntawm - kua rau ntau qhov chaw. Cov no yog cov ntsiab lus pib, tsis yog kev xaiv zaum kawg.
Flow Measurement yog dab tsi?
Kev ntsuas dej piav qhia tias cov kua txav nrawm npaum li cas los ntawm cov ntu uas tau hais tseg lossis cov kua dej ntau npaum li cas thaum lub sijhawm teev tseg. Cov nroj tsuag muaj siv cov ntaub ntawv no rau kev tswj cov txheej txheem, batching, tshuaj noj tshuaj, tshuaj xyuas lub zog, kev tiv thaiv cov cuab yeej, kev tshaj tawm, kev faib hluav taws xob, kev tshawb nrhiav pom, thiab kev hloov mus rau kev lag luam.
Ib qho kev ntsuas ua tiav yuav suav nrog cov thawj sensor, transmitter, hauv zos zaub, totalizer, siab lossis kub them, cov ntaub ntawv logger, thiab kev sib txuas rau PLC, DCS, BMS, EMS, lossis SCADA platform.
Lub cev ntsuas lub cev tsuas yog ib feem ntawm kev ntsuas qhov zoo. Cov kua dej, kev teeb tsa cov kav dej, cov ntaub ntawv teeb tsa, kev siv ntsuas ntsuas, thiab kev tswj hwm - qhov kev ntsuas qhov ntsuas tuaj yeem cuam tshuam rau qhov kawg tshwm sim. NIST cov kev tshawb fawb ntws ntsuas cov qauv kev khiav hauj lwm thiab kev ua haujlwm nyob rau hauv cov kua sib txawv, qhov kub thiab txias, siab, ntws tus nqi, thiab kev teeb tsa los ntawm nws.flow metrology programs.
Flow Meter ntsuas dab tsi?
Volumetric Flow Rate
Volumetric flow rate yog qhov ntim dhau los ntawm cov yeeb nkab rau ib chav tsev ntawm lub sijhawm. Cov chav nyob muaj xws li cubic meters ib teev, litres ib feeb, gallons ib feeb, thiab cubic feet ib feeb.
Rau ib tug puv puv voj voog:
Q = A × v
- Qyog volumetric flow rate.
- Ayog thaj tsam hauv cov yeeb nkab.
- vyog qhov nruab nrab ntawm cov dej tshaj tawm.
Kev nrawm-raws li thev naus laus zis xws li sib nqus, ultrasonic, vortex, thiab turbine meters siv ntsuas ntsuas qhov nrawm lossis qhov cuam tshuam ntawm lub cev los ntsuas qhov ntim ntim. Yog li ntawd, txoj kab uas hla ntawm cov yeeb nkab sab hauv yuav tsum yog.
Mass Flow Rate
Qhov loj txaus ntsuas ntsuas qhov tseeb huab hwm coj hloov mus rau ib chav tsev ntawm lub sijhawm. Nws yog feem ntau muaj txiaj ntsig ntau dua li ntim thaum cov khoom muaj nqis, kev tsim, kev sib txuas, cov khoom sib npaug, lossis kev suav lub zog nyob ntawm seb cov khoom siv ntau npaum li cas es tsis yog qhov chaw nws nyob.
Kev loj hlob tuaj yeem cuam tshuam nrog ntim thiab ntom:
ṁ = ρ × Q
- ṁyog mass flow rate.
- ρyog kua density.
- Qyog volumetric flow rate.
Coriolis meters ntsuas huab cua ntws ncaj qha. Lwm lub tshuab tuaj yeem suav cov dej ntws los ntawm cov ntim ntim, siab, kub, ntom, lossis cov ntaub ntawv muaj pes tsawg leeg.
Flow Velocity
Velocity piav qhia tias cov kua txav nrawm npaum li cas los ntawm cov yeeb nkab. Nws yog ib qho tseem ceeb rau 'meter' sizing vim tias qhov qis tshaj tawm tuaj yeem txo cov teeb liab zoo lossis tso cai rau cov khib nyiab kom daws tau, thaum lub sijhawm tshaj tawm yuav ua rau kom poob siab, suab nrov, yaig, lossis kev co.
Totalized Flow
Instantaneous flow rate qhia tau hais tias cov kua txav nrawm npaum li cas rau lub sijhawm tam sim no. Totalized flow accumulates qhov ntsuas ntau dhau sijhawm.
Totalization feem ntau xav tau rau:
- Batch filling
- Kev siv dej
- Roj xa
- Energy accounting
- Kev tshaj tawm ntau lawm
- Kev them nqi hluav taws xob
Qhov tseeb Gas Flow thiab Standard Gas Flow
Cov roj ntim hloov pauv nrog lub siab thiab qhov kub thiab txias. Qhov tseeb volumetric flow piav qhia qhov ntim raws li kab mob tiag tiag. Standard flow converts qhov ntim mus rau qhov ntsuas qhov ntsuas kub thiab siab.
Yog li ntawd, ib tug gas flow specification yuav tsum hais tias:
- Seb tus nqi yog qhov tseeb lossis tus qauv
- Qhov ntsuas kub siv
- Kev siv siab
- Seb qhov siab yog qhov tseeb lossis ntsuas qhov siab
- Qhov xav tau roj muaj pes tsawg leeg
- Txawm tias cov pa roj qhuav los yog muaj cov dej noo
Yog tias tsis muaj cov ntaub ntawv hais txog, ob lub cuab yeej tuaj yeem tshaj tawm qhov sib txawv ntawm qhov sib txawv txawm tias tib lub zog ntawm cov pa nkag los ntawm cov yeeb nkab.
Kaw-Ppipe thiab Qhib-Channel Flow Measurement
Feem ntau cov ntsuas dej ntws tau tsim los rau cov kav dej kaw uas nyob twj ywm tag nrho thiab ua haujlwm hauv siab. Qhib-channel systems muaj cov kua dej dawb thiab yuav tsum muaj kev ntsuas sib txawv.
Qhib- channel ntws feem ntau yog txiav txim siab los ntawm kev ntsuas cov kua theem siab ntawm cov qauv hydraulic xws li lub weir lossis flume thiab hloov qib ntawd mus rau hauv ntws. Lub geometry, cov dej ntws mus kom ze, cov dej ntws hauv qab, theem sensor qhov chaw, thiab kev saib xyuas channel txhua yam cuam tshuam rau qhov raug. US Environmental Protection Agency muab kev taw qhia txogntsuas dej ntawm cov dej khib nyiab.
Tsis txhob siv kaw- cov kev xav ntawm cov kav dej rau cov kav dej uas muaj cov kav dej, cov kav dej, cov kav dej, lossis cov kav dej. Ib lub yeeb nkab-mounted kua flow meter thiab qhib-channel theem- rau-flow system daws teeb meem kev ntsuas sib txawv.
Quick Flow Meter Xaiv Matrix
| Txheej txheem txheej txheem | Technologies rau Shortlist | Tseem ceeb Exclusions lossis Checks |
|---|---|---|
| Direct mass flow los yog ntom yog yuav tsum tau | Coriolis | Txheeb xyuas qhov poob siab, kab loj, kev vibration, roj nkag, kev ntxhov siab rau kev teeb tsa, thiab tus nqi |
| Kev siv dej, dej khib nyiab, tshuaj lom neeg, lossis slurry | Electromagnetic | Tshem tawm cov dej tsis muaj hluav taws xob, cov pa roj, thiab chav dej; xyuas tag nrho - yeeb nkab, av, liner, thiab electrodes |
| Cov yeeb nkab tsis tuaj yeem raug txiav lossis cov txheej txheem tsis tuaj yeem nres | Clamp{0}} ntawm ultrasonic | Xyuas cov khoom siv yeeb nkab, hauv ob sab phlu, phab ntsa thickness, acoustic txoj kev, npuas, khib nyiab, thiab cov yeeb nkab ncaj |
| Chav los yog ntxuav tsob nroj kev pab cuam | Vortex los yog sib txawv siab | Txheeb xyuas qhov qis- khiav dej num, chav dej, kev co, kev them nyiaj, thiab kev poob siab mus tas li |
| Ntxuav compressed cua los yog industrial gas | Thermal huab hwm coj, vortex, sib txawv siab, los yog ultrasonic | Tshawb xyuas cov roj muaj pes tsawg leeg, noo noo, siab, tiag tiag- tiv thaiv- kev tshaj tawm tus qauv, thiab kev teeb tsa profile |
| Ntxuav, tsawg- kua viscosity nrog ceev teb | Turbine | Tshem tawm cov dej qias neeg thiab tshuaj xyuas cov kabmob hnav, hloov viscosity, pom, thiab cov yeeb nkab ncaj |
| Ntxuav kua nplaum los yog kua dej tsawg | Kev hloov pauv zoo lossis iav ntsuas | Tshawb xyuas cov khoom, qhov poob siab, lubrication, cov khoom siv sib xws, thiab txav tau - kev tu ib feem |
| Yooj yim hauv zos qhia yam tsis muaj hwj chim sab nraud | Hloov pauv - cheeb tsam meter | Xyuas mounting orientation, siab ntsuas, nyeem ntawv raug, thiab tej thaj chaw deb - tso zis yuav tsum |
Lub ntsiab hom Flow Meters thiab lawv ua haujlwm li cas
Ultrasonic Flow Meters
Ibultrasonic flow metersiv cov cim acoustic los txiav txim siab cov dej nrawm. Transit-cov cuab yeej siv sijhawm sib piv lub sijhawm mus ncig ntawm cov cim txav nrog thiab tawm tsam qhov ntws. Doppler cov cuab yeej ntsuas qhov zaus hloov pauv ntawm cov teeb liab cuam tshuam los ntawm cov khoom raug tshem tawm lossis cov npuas roj.
Kev thauj mus los- lub sijhawm thev naus laus zis ib txwm haum rau cov kua dej uas tuaj yeem xa cov teeb liab acoustic ruaj khov. Doppler thev naus laus zis yuav tsum muaj cov reflectors txaus thiab yuav tsum tsis txhob raug kho raws li kev hloov ncaj qha rau kev thauj mus los - lub sijhawm ntsuas.
Ultrasonic systems tej zaum yuav yog:
- Clamp- rau:Sensors raug ntsia sab nraum cov yeeb nkab yam tsis muaj kev nkag mus rau cov txheej txheem.
- Insertion:Sensors nkag mus rau hauv cov yeeb nkab los ntawm cov txheej txheem sib txuas.
- Hauv kab:Txoj kev acoustic yog ua rau hauv ib lub meter siab lub cev.
- Tib -path lossis multipath:Lwm txoj hauv kev tuaj yeem muab cov ntaub ntawv ntau ntxiv txog qhov nrawm nrawm.
Kev ntsuas ultrasonic yog qhov txaus nyiam rau cov kav dej loj, dej txias, kev tshawb fawb ib ntus, kev tshuaj xyuas lub zog, thiab cov haujlwm ua haujlwm rov qab. Nws qhov kev ua tau zoo yog nyob ntawm qhov ntev ntawm cov yeeb nkab, qhov sib txawv ntawm qhov sib txawv, qhov sib txuas tsim nyog, cov dej ruaj khov, thiab tus neeg sawv cev ntws profile.
Tshaj tawm 'meter' raug tsis yog qhov kev txiav txim siab nkaus xwb. Cov ntaub ntawv yeeb nkab, qhov chaw sensor, lub teeb liab zoo, cov kab mob ntawm phab ntsa, hauv ob sab phlu, npuas, thiab qhov kub thiab txias tuaj yeem cuam tshuam rau kev ua haujlwm. Ib qho lus piav qhia ntxiv muaj nyob rau hauv phau ntawv qhiaultrasonic flow meter raug.
Electromagnetic Flow Meters
Ibelectromagnetic flow meter, kuj hu ua magnetic flow meter los yog magmeter, siv lub magnetic teb nyob rau hauv ib tug insulated ntsuas raj. Ib tug conductive kua txav los ntawm lub teb generates ib tug voltage uas yog proportional rau tshaj tawm.
Sib nqus meters yog dav suav hais tias yog cov dej conductive, dej khib nyiab, acids, alkalis, slurries, dej txias, thiab ntau cov txheej txheem ua kua. Lub raj ntsuas qhib tsis muaj qhov cuam tshuam rotating thiab feem ntau ua rau me ntsis kev poob siab mus tas li.
Lawv yuav tsum raug cais tawm thaum qhov nruab nrab yog cov pa roj, nkev, lossis cov kua dej tsis zoo. Kev xaiv yuav tsum suav nrog:
- Yam tsawg kawg nkaus ua kua conductivity
- Tag nrho - yeeb nkab tej yam kev mob
- Hluav taws xob grounding los yog siv electrodes
- Liner thiab electrode compatibility
- Kev puas tsuaj los ntawm cov khoom raug tshem tawm
- Txheej, scaling, los yog electrode deposits
- Empty -pipe detection
- Kev nrawm yuav tsum tau txwv kev daws teeb meem
Vortex Flow Meters
A vortex flow metertso ib lub cev bluff rau hauv ntws. Alternating vortices tsim downstream, thiab lawv cov zaus ntws yog cuam tshuam nrog cov dej tshaj tawm.
Vortex meters yog cov neeg sib tw rau chav dej, huv si, cua compressed, thiab cov kua dej huv. Lawv tsis muaj rotor rotor, tab sis lub cev bluff tsim muaj kev cuam tshuam thiab qee qhov kev poob siab mus tas li.
Kev xaiv yuav tsum tau saib xyuas:
- Tsawg kawg Reynolds tus naj npawb thiab siv tau qis -flow range
- Cov yeeb nkab vibration
- Pulsating ntws
- Saturated los yog superheated chav
- Ntws chav thiab condensate
- Siab thiab kub them nyiaj
- Upstream cuam tshuam
Lub vortex meter tsuas yog rau qhov siab tshaj qhov xav tau tuaj yeem poob lub teeb liab ruaj khov thaum lub sijhawm ua haujlwm qis -load. Qhov ib txwm thiab qhov tsawg kawg nkaus chav ntsuas feem ntau tseem ceeb tshaj qhov siab tshaj plaws txhua yam muaj peev xwm.
Thermal Mass Flow Meters
A thermal mass flow meterntsuas cov cua kub hloov los ntawm ib qho rhuab sensing caij mus rau cov pa txav. Cov cua sov- cov lus teb poob yog cuam tshuam nrog cov pa roj.
Thermal mass meters yog nquag siv rau compressed cua, nitrogen, biogas, aeration cua, burner gas, thiab gas faib. Lawv tuaj yeem muab cov huab hwm coj ncaj qha- qhov taw qhia ntws yam tsis muaj kev sib cais ntawm lub siab thiab ntsuas kub thaum cov pa roj thiab ntsuas ntsuas qhov ntsuas tseem siv tau.
Cov kev txwv tseem ceeb suav nrog:
- Kev hloov pauv hauv cov pa roj
- Cov roj ntub dej los yog condensation
- Sensor paug
- Incorrect qhov tob
- Flow-profile distortion
- Qhov sib txawv ntawm calibration gas thiab txheej txheem roj
US Department of Energy tham txog kev ntsuas thiab saib xyuas raws li ib feem ntawm kev txhim kho kev lag luam compressed - huab cua kev ua haujlwm hauv nwscompressed cua cov ntaub ntawv.
Turbine Flow Meters
A turbine flow metertso lub bladed rotor rau hauv cov kwj deg. Rotor ceev yog hloov dua siab tshiab rau hauv zaus los yog mem tes teeb liab ntsig txog tus nqi ntws.
Turbine meters tuaj yeem muab cov lus teb ceev ceev thiab rov ua tau zoo rau cov dej huv, qis -viscosity. Lawv tsis haum rau cov kua dej qias neeg, cov khoom loj, cov viscosity tsis ruaj khov, lossis cov ntawv thov uas hnav tsis tuaj yeem zam.
Xyuas pom, lubrication, rotor cov ntaub ntawv, bearing mob, yam tsawg tshaj plaws ceev, ncaj yeeb nkab, thiab cov nyhuv ntawm viscosity ntawm lub 'meter'. Kev sib raug zoo ntawm viscosity thiab ntsuas tus cwj pwm tau piav qhia ntxiv hauv qhov kev piav qhia ntawm nokua viscosity thiab flow meter kev ua tau zoo.
Qhov Zoo Tshaj Plaws thiab Gear Flow Meters
Qhov zoo- cov ntsuas qhov ntsuas tau cais cov kua rau hauv qhov ntsuas ntau zaus. Oval- iav thiab lwm yamiav flowmetersiv cov khoom txav sab hauv los ua kom muaj qhov tso zis ntau.
Lawv feem ntau raug xaiv rau cov roj huv, roj, resins, syrups, lubricants, thiab lwm yam kua viscous, tshwj xeeb tshaj yog qhov uas tsis tshua muaj - flow performance tseem ceeb.
Lawv yuav tsum tau saib xyuas kom zoo rau cov khib nyiab, crystallization, siab poob, mechanical hnav, lubrication, thiab tu. Cov kua dej uas cov tsho tiv no los yog xauv cov khoom ntsuas tuaj yeem ua rau muaj kev cuam tshuam los yog ua kom tiav.
Sib txawv -Kev ntsuas qhov ntsuas siab
Differential-Lub tshuab nqus dej siab siv lub hauv paus tseem ceeb xws li lub phaj orifice, Venturi raj, nozzle, wedge meter, lossis nruab nrab pitot raj. Qhov kev txwv hloov nrawm thiab tsim kom muaj qhov sib txawv siab uas ntsuas los ntawm aDifferential siab transmitter.
Cov ntsiab lus tseem ceeb ntawm tus kheej yuav tsum tsis txhob raug kho kom zoo ib yam. Lawv txawv ntawm qhov poob siab, qhov ntev ntawm kev teeb tsa, kev tiv thaiv kev sib kis, tus nqi, kev hloov pauv, thiab kev saib xyuas yuav tsum tau ua.
DP systems tuaj yeem ntsuas cov kua, roj, thiab chav dej, tab sis cov txheej txheem tiav kuj yuav xav tau:
- Siab thiab kub them nyiaj
- Impulse piping los yog tej thaj chaw deb ntsaws ruaj ruaj
- Kho tus kais taw qhia
- Condensate pots rau chav
- Cov ntaub ntawv ceev
- Square{0}} rho tawm hauv paus
- Kev tshuaj xyuas rau cov kab thaiv los yog xau impulse
Coriolis thiab Variable -Area Meters
Coriolis meters siv vibrating ntsuas raj thiab ntes cov theem sib txawv uas tsim thaum huab hwm coj ntws los ntawm cov qauv oscillating. Lawv yog cov neeg sib tw muaj zog thaum cov dej ntws ncaj qha, qhov ntom ntom, batching, lossis siab rov ua dua, tab sis kev poob siab, roj nkag, kev vibration, kev ntxhov siab, qhov loj, qhov hnyav, thiab tus nqi yuav tsum raug ntsuas.
Hloov pauv tau - cheeb tsam metres siv lub ntab hauv ib lub raj xaim. Lawv muab cov lus qhia yooj yim hauv zos thiab tej zaum yuav xav tau tsis muaj lub zog sab nraud, tab sis lawv muaj kev siv hluav taws xob tsawg dua thiab ib txwm muaj kev txwv ntau dua thiab kev nyeem ntawv.
Yuav Ua Li Cas Xaiv Txoj Cai Flow Meter?
Kauj Ruam 1: Txhais Lub Hom Phiaj Ntsuas
Pib nrog kev lag luam lossis txheej txheem vim li cas rau kev ntsuas ntws. Ib lub 'meter' siv rau kev sib tw dav dav tsis xav tau tib yam kev ua tau zoo, traceability, redundancy, los yog daim ntawv pov thawj raws li ib qho siv rau kev saib xyuas hloov chaw lossis kev tsim.
Cov hom phiaj uas muaj xws li:
- Cov txheej txheem tswj
- Batch filling
- Tshuaj lom neeg
- Kev saib xyuas kev siv hluav taws xob
- Kev sib npaug zog
- Kev kuaj pom pom
- Cov cuab yeej tiv thaiv
- Kev cai qhia
- Kev xa mus ua lag luam
Kuj txiav txim siab seb qhov yuav tsum tau tso tawm yog qhov loj txaus, qhov ntim tiag tiag, ntim cov qauv, tshaj tawm, thermal zog, lossis tag nrho cov khoom.
Kauj Ruam 2: Qhia cov kua dej
Sau cov txheej txheem qhov nruab nrab tsis yog siv cov lus piav qhia dav dav xws li "dej" lossis "gas."
- Kua, roj, ncu, slurry, los yog multiphase mob
- Qhov ceev thiab xav kom ceev hloov
- viscosity ntawm qhov tsawg kawg nkaus thiab siab tshaj qhov kub
- Hluav taws xob conductivity
- Tshuaj muaj pes tsawg leeg
- Corrosiveness
- Khoom concentration thiab particle loj
- Entrained gas los yog npuas
- Moisture los yog condensation
- Txheej, scaling, polymerization, lossis crystallization
- Hygienic, tshuaj lom, los yog muaj kev phom sij
Ib lub tshuab yuav tsum raug tshem tawm ntawm daim ntawv luv luv sai li sai tau thaum cov kua ua txhaum qhov kev ntsuas tseem ceeb. Piv txwv li, lub ntsuas hluav taws xob sib nqus yuav tsum tsis txhob nyob twj ywm rau hauv kev txiav txim siab rau cov roj uas tsis muaj hluav taws xob, thiab tus qauv turbine meter yuav tsum tsis txhob nyob rau hauv kev txiav txim siab rau abrasive slurry.
Kauj Ruam 3: Tsim lub hnab ntawv ua kom tiav
Sau qhov tsawg kawg nkaus, ib txwm, thiab siab tshaj plaws nruam ntws. Kuj tseem suav nrog kev pib, kaw, tu, dej ntws tawm, thim rov qab, kev xav tau raws caij nyoog, thiab kev nthuav dav yav tom ntej.
Tsis txhob xaiv ib lub 'meter' nkaus xwb vim hais tias nws cov ntawv tshaj tawm qhov siab tshaj plaws ntawm cov txheej txheem siab tshaj plaws. Qhov taw qhia kev ua haujlwm ib txwm muaj thiab qis -flow kev ua tau zoo txiav txim siab seb lub ntsuas ntsuas puas yuav muab kev nyeem ntawv muaj txiaj ntsig zoo rau feem ntau ntawm nws lub neej ua haujlwm.
Kauj Ruam 4: Loj lub Meter Siv Flow, Tsis Pipe Diameter Ib leeg
Cov txheej txheem yeeb nkab thiab ntws ntsuas tsis tas yuav tsum muaj tib lub nominal txoj kab uas hla. Qhov ntsuas qhov ntsuas me me tuaj yeem txhim kho qhov nrawm thiab qis - ntws kev ua tau zoo, tab sis cov reducers tuaj yeem ntxiv qhov poob siab thiab hloov pauv qhov ntws.
Piv txwv sizing:Xav txog lub nominal 300 mm dej yeeb nkab nrog ib txoj kab uas hla ntawm 0.30 m.
- Ntawm 60 m³ / h, kwv yees qhov nrawm yog 0.24 m / s.
- Ntawm 180 m³ / h, kwv yees qhov nrawm yog 0.71 m / s.
- Ntawm 300 m³ / h, kwv yees qhov nrawm yog 1.18 m / s.
Cov duab no tsis xaiv lub 'meter' los ntawm lawv tus kheej. Lawv qhia tias yog vim li cas yam tsawg kawg nkaus, qhov qub, thiab qhov siab tshaj plaws yuav tsum tau hloov mus rau hauv kev tshaj tawm thiab tshuaj xyuas tawm tsam cov txheej txheem xaiv cov txheej txheem kev ua haujlwm.
Ua ntej pom zoo ib 'meter' loj, thov:
- Siv tau ntau yam rau qhov loj xaiv
- Muaj tseeb nyob rau ntawm qhov yuav tsum tau muaj
- Siab- poob nkhaus
- Pom zoo txwv ceev
- Tsawg-Flow cutoff cwj pwm
- Cov txheej txheem tso cai siab tshaj plaws
Kauj Ruam 5: Sib piv cov lus txhais kom raug
Qhov tseeb tau hais raws li qhov feem pua ntawm kev nyeem ntawv tsis sib npaug rau qhov tseeb tau teev tseg raws li feem pua ntawm tag nrho cov nplai.
Kev sib piv:
- Ib lub 'meter' teev ntawm ± 0.5% ntawm kev nyeem ntawv muaj qhov ua yuam kev ntawm ± 0.05 units thaum nyeem ntawv yog 10 units.
- Ib lub 'meter' teev ntawm ± 0.5% ntawm 100-unit tag nrho teev muaj qhov ua yuam kev ntawm ± 0.5 units ntawm tib 10-unit nyeem ntawv.
Qhov thib ob tus nqi sib npaug 5% ntawm qhov qis -kawm nyeem txawm tias ob daim ntawv teev cov ntawv qhia "0.5%. Zero stability, cov ntsiab lus tsis raug, calibration ntau yam, thiab cov teebmeem kev teeb tsa yuav tsum raug tshuaj xyuas.
Lub International Society of Automation muab qhov sib txawv ntawm qhov muaj txiaj ntsigflow meter raug, repeatability, thiab sizing.
Kauj Ruam 6: Saib xyuas qhov kev teeb tsa tiag tiag
Tshawb xyuas qhov chaw teeb tsa ua ntej ua tiav cov thev naus laus zis.
- Upstream thiab downstream ncaj yeeb nkab
- Lub luj tshib, tees, reducers, twj, thiab tswj li qub
- Txawm hais tias cov yeeb nkab ua kua tseem tag nrho
- Cov yeeb nkab vibration
- Pulsating ntws
- Muaj qhov ntev installation
- Cov khoom siv yeeb nkab, hauv ob sab phlu, txheej, thiab phab ntsa thickness
- Kev siv tau rau kev kho
- Sab nraum zoov raug, dej nyab, thiab ambient kub
- Seb puas tau kaw thiab txiav yeeb nkab
- Kev puas tsuaj - thaj chaw faib
Ncaj nraim- cov kav dej yuav tsum nyob ntawm qhov ntsuas thiab hom kev cuam tshuam txog dej ntws. Tus lej dav dav yuav tsum tsis txhob hloov cov chaw tsim khoom xaiv cov lus qhia. Saib kev sib tham ntawmupstream thiab downstream ncaj yeeb nkab seemthaum npaj lub installation.
Kauj Ruam 7: Paub meej cov khoom, cov khoom tawm, thiab kev ua raws cai
Tag nrho cov ntaub ntawv ntub dej yuav tsum sib haum nrog cov txheej txheem dej, tshuaj ntxuav, siab, kub, thiab qib abrasion.
Kev tshuaj xyuas:
- Meter lub cev thiab cov khoom siv sensor
- Liner thiab electrode cov ntaub ntawv
- Cov ntsaws ruaj ruaj thiab gaskets
- Flange los yog huv kev sib txuas
- Kev ntsuas siab
- Ntxuav thiab sterilization tej yam kev mob
- Yuav tsum muaj kev tiv thaiv ingress
- Txaus ntshai- thaj chaw pom zoo
- Kev haus dej - dej, huv si, dej hiav txwv, lossis kev saib xyuas- yuav tsum hloov pauv
Paub meej tias cov teeb liab thiab kev sib txuas lus uas yuav tsum tau muaj, suav nrog 4–20 mA, mem tes, zaus, relay, HART, Modbus, cov ntaub ntawv kaw lus, cov chaw taws teeb tswj, thiab kev tswj hwm -kev sib koom ua ke.
Kauj Ruam 8: Muab piv rau Lifecycle Tus Nqi
Tus nqi yuav khoom tsuas yog ib feem ntawm kev ntsuas ntsuas tus nqi.
| Nqi Element | Cov lus nug |
|---|---|
| Kev teeb tsa | Yuav tsum tau txiav, welded, drained, ntxuav, los yog kaw? |
| Kev poob siab | Lub 'meter' puas yuav nce lub zog los yog compression zog? |
| Kev ua haujlwm | Lub 'meter' puas xav tau kev teeb tsa tshwj xeeb, tso dej txias, lossis kev txheeb xyuas qhov chaw? |
| Kev tu | Puas muaj cov khoom txav, cov kab impulse, electrodes, sensing ntsiab, los yog coupling nto los tshuaj xyuas? |
| Calibration | Cov ntsuas puas tuaj yeem raug tshem tawm, piv rau hauv qhov chaw, lossis ntsuas hluav taws xob? |
| Txheej txheem txaus ntshai | Tus nqi ntawm cov khoom siv tsis raug yog dab tsi, kev siv hluav taws xob tsis txaus, kaw, lossis ploj lawm? |
| Kev pab lub neej | Puas yog cov khoom seem, kev txhawb nqa, thiab cov khoom hloov pauv puas muaj? |
Ob Qhov Kev Xaiv Ua Haujlwm Flow Meter piv txwv
Piv txwv 1: DN300 Chilled -Dej Retrofit yam tsis tau kaw
Txheej txheem txheej txheem:Lub qhov txias txias loj - cov kav dej twb ua haujlwm lawm. Lub chaw xav tau kev khiav dej num tas mus li thiab kev saib xyuas lub zog, tab sis tsis tuaj yeem tso dej lossis txiav cov yeeb nkab thaum lub sijhawm tsim khoom.
Initial shortlist:Clamp{0}} ntawm ultrasonic thiab inline magnetic flow ntsuas.
Kev txiav txim siab:
- Qhov tsis muaj - qhov yuav tsum tau kaw yog nyiam rau kev teeb tsa ultrasonic sab nraud.
- Tus kws tshaj lij yuav tsum paub meej tias cov khoom siv yeeb nkab, phab ntsa thickness, sab hauv ob sab phlu, sab nrauv, dej kub, thiab muaj cov yeeb nkab ncaj.
- Cov kua dej yuav tsum muab kev thauj mus los siv tau - lub sij hawm acoustic txoj kev tsis muaj npuas ntau dhau.
- Yog tias qhov ntsuas tau siv rau kev suav lub zog, qhov ntsuas kub thiab qhov ntsuas tag nrho yuav tsum tau kuaj xyuas.
- Yog tias qhov kev teeb tsa tom qab xav tau kev ntsuas kev ua tau zoo dua qub thiab kaw qhov ua tau, qhov ntsuas hluav taws xob inline tuaj yeem muab piv.
Ib qho chaw pib tsim nyog yog aclamp- ntawm ultrasonic flow transmitter. Qhov kev txiav txim zaum kawg tseem yuav tsum tau txais kev txhawb nqa los ntawm kev soj ntsuam lub teeb liab thiab kev sib piv ntawmUltrasonic thiab electromagnetic flow ntsuas.
Piv txwv 2: Conductive Wastewater Containing Suspended Solids
Txheej txheem txheej txheem:Cov dej khib nyiab ntws los ntawm cov kav dej kaw tag nrho. Cov kua yog conductive thiab muaj cov khoom uas raug tshem tawm. Cov txheej txheem yuav tsum tau nruam volumetric flow thiab totalization.
Initial shortlist:Electromagnetic flow meter, nrog xaiv ultrasonic lossis tshwj xeeb DP technologies khaws cia tsuas yog tias lub installation tsim ib qho laj thawj tshwj xeeb.
Kev txiav txim siab:
- Conductivity txhawb kev ntsuas magnetic.
- Qhov qhib bore zam lub rotor los yog nqaim mechanical passage.
- Cov yeeb nkab yuav tsum nyob tag nrho ntawm qhov chaw 'meter'.
- Lub liner yuav tsum zam cov tshuaj raug thiab puas.
- Cov khoom siv electrode yuav tsum tiv thaiv corrosion thiab txheej.
- Qhov kev tshaj tawm yuav tsum txwv cov khib nyiab uas tsis tsim kev hnav tsis tau.
- Grounding thiab khoob -piping detection yuav tsum muaj nyob rau hauv kev npaj installation.
Cov lus teb raug tsis yog "siv lub magmeter." Lub 'meter' loj, liner, electrodes, hauv av, khiav ceev, thiab kev saib xyuas yuav tsum tau teev tseg rau cov dej khib nyiab.
Flow Meter Xaiv los ntawm Daim Ntawv Thov
| Daim ntawv thov | Common Shortlist | Kev txiav txim siab tseem ceeb |
|---|---|---|
| Cov dej huv thiab dej txias | Sib nqus los yog ultrasonic | Conductivity, yeeb nkab nkag, siab poob, kaw, yeeb nkab loj, thiab qhov yuav tsum tau muaj tseeb |
| Cov dej khib nyiab thiab conductive slurry | Sib nqus, tshwj xeeb ultrasonic, lossis xaiv DP tsim | Conductivity, solids, abrasion, txheej, tag nrho cov yeeb nkab, thiab kev daws teeb meem |
| Chav | Vortex los yog sib txawv siab | Chav zoo, qis- ntws ntau, siab thiab kub them, kev co, thiab condensate |
| Compressed cua | Thermal huab hwm coj, vortex, DP, los yog ultrasonic | Gas muaj pes tsawg leeg, siab, noo noo, txheej txheem tej yam kev mob, yeeb nkab loj, thiab yuav tsum tau turndown |
| Ntxuav tsawg- roj viscosity | Turbine, zoo hloov chaw, Coriolis, los yog ultrasonic | Viscosity stability, huv si, xav tau huab hwm coj los yog ntim, siab poob, thiab kev lag luam raug |
| Ntxiv roj, resin, los yog syrup | Kev hloov pauv zoo, iav, lossis Coriolis | Ntau yam viscosity, hais, cua sov, siab poob, tu, thiab qis - yuav tsum tau ntws |
| Chemical dosing thiab batching | Coriolis, sib nqus, zoo hloov chaw, lossis turbine | Yuav tsum tau loj los yog ntim, batch loj, tshuaj compatibility, teb lub sij hawm, thiab repeatability |
| Kev ua zaub mov thiab tshuaj | Hygienic Coriolis, sib nqus, turbine, los yog zoo hloov chaw | Drainability, huv si, nto tiav, huv si sib txuas, khoom viscosity, thiab traceability |
Teeb meem kev teeb tsa uas cuam tshuam rau kev ntsuas ntws
Lub ntsuas ntsuas siab - tseem tuaj yeem ua haujlwm tsis zoo thaum lub teeb tsa tsis ua raws li txoj cai ntsuas.
| Pom teeb meem | Tej Yam Ua Tau | Pom zoo xyuas |
|---|---|---|
| Kev nyeem tsis ruaj khov ntawm xoom ntws | Kev vibration, gas zog, hluav taws xob nrov, to valve, tsis raug xoom chaw, los yog ob -theem kua | Txheeb xyuas qhov tseeb xoom ntws, tshuaj xyuas kev vibration, tshawb xyuas hauv av, thiab tshuaj xyuas cov txheej txheem xoom |
| Tsis muaj zog ultrasonic teeb liab | Cov ntaub ntawv yeeb nkab tsis raug, kev sib txuas tsis zoo, qhov tsis sib haum ntawm qhov ntsuas qhov sib txawv, sab hauv hauv ob sab phlu, corrosion, npuas, los yog cov khib nyiab ntau dhau | Txheeb xyuas cov yeeb nkab qhov ntev, remount sensors, tshuaj xyuas kev sib txuas, tshuaj xyuas cov teeb liab zoo, thiab sim lwm qhov chaw |
| Magnetic meter tso zis fluctuates | Ib nrab cov yeeb nkab, tsis zoo hauv av, txheej electrode, roj npuas, lossis tsis ruaj khov conductivity | Txheeb xyuas cov yeeb nkab txhaws, cov nplhaib hauv av, cov khoom siv hluav taws xob, kev taw qhia kev teeb tsa, thiab khoob - yeeb nkab tswb |
| Vortex meter poob teeb liab ntawm qhov xav tau qis | Ntws hauv qab qhov siv tau ntau yam, chav ntub dej, pulsation, kev vibration, lossis qhov ntsuas loj | Sib piv cov dej ntws qis tiag tiag nrog lub ntsuas ntsuas thiab tshuaj xyuas qhov loj me, chav dej, thiab kev vibration |
| Turbine meter maj mam drifts | Bearing coj, paug, viscosity hloov, puas rotor, los yog tsis txaus pom | Tshawb xyuas cov khoom txav, sib piv cov ntsuas ntsuas, txheeb xyuas qhov viscosity, thiab tshuaj xyuas pom |
| DP ntws yog siab dua lossis qis dua qhov xav tau | Thaiv kab impulse, xau, tsis raug square-cov hauv paus extraction, tsis ncaj ncees lawm ceev, puas lub hauv paus ntsiab lus, los yog reversed kev twb kev txuas | Tshawb xyuas cov kais dej thiab cov kab impulse, txheeb xyuas qhov teeb tsa transmitter, thiab xyuas cov nyiaj them poob haujlwm |
Qhov tseeb, rov ua dua, rov ua dua, thiab txhim kho kev ua tau zoo
Qhov tseeb
Qhov tseeb piav txog qhov ze rau tus nqi siv raws li cov xwm txheej tau teev tseg. Nco ntsoov xyuas seb qhov kev qhia tshwj xeeb yog raws li kev nyeem ntawv, teev tag nrho, ntsuas qhov ntsuas, lossis cov qauv sib xyaw ua ke.
Rov ua dua
Repeatability piav qhia txog yuav ua li cas ib lub 'meter' ua tau zoo ib yam hauv cov xwm txheej tsis hloov. Ib lub 'meter' tuaj yeem ua tau ntau dua tab sis tsis tu ncua offset los ntawm qhov tseeb siv.
Kev poob qis
Turndown yog qhov piv ntawm qhov siab tshaj plaws thiab qhov tsawg kawg nkaus ntsuas tau. Ib tug loj luam tawm turndown tsis ua pov thawj tias qhov yuav tsum tau muaj tseeb yuav tsum tau khaws cia nyob rau hauv tus txheej txheem yam tsawg kawg nkaus.
Txhim kho qhov tseeb
Kev txhim kho kev ua tau zoo tuaj yeem suav nrog ntau tshaj qhov ntsuas qhov ntsuas qhov ntsuas. Nyob ntawm qhov system, cov teebmeem ntxiv tuaj yeem los ntawm:
- Cov yeeb nkab qhov ntev
- Flow-profile distortion
- Siab thiab kub sensors
- Cov ntaub ntawv ceev los yog muaj pes tsawg leeg
- Kev hloov dua siab tshiab
- Transmitter scaling
- Calibration reference
- Rov ua dua
- Installation thiab tej yam kev mob
Rau ib daim ntawv thov tseem ceeb, nug txog qhov kev xav tsis meej ntawm qhov kev ntsuas ua tiav es tsis yog cia siab rau qhov tseeb ntawm qhov tseeb ntawm cov xov xwm.
Calibration, Verification, thiab Measurement Uncertainty
Calibration
Calibration piv cov 'meter' nrog ib tug traceable siv nyob rau hauv cov kev mob uas tau teev tseg thiab sau cov kev sib raug zoo ntawm qhia thiab siv qhov tseem ceeb. Nws yuav ua rau muaj kev hloov kho, kho qhov zoo, qhov ntsuas ntsuas tshiab, lossis daim ntawv pov thawj calibration.
NIST tuavlub teb chaws kua- cov qauv ntwsthiab muab cov kev ntsuas ntsuas ntsuas ntsuas ntsuas raws li qhov ntsuas ntsuas ntsuas thiab ntsuas ntsuas ntsuas.
Rau qhov chaw - theem kev npaj, tshuaj xyuas cov kauj ruam uas muaj feem xyuam nrogflow meter calibration, suav nrog cov txheej txheem siv, cov txheej txheem txheej txheem, cov ntsiab lus xeem, thiab kev lees paub.
Kev pov thawj
Kev txheeb xyuas xyuas seb lub ntsuas ntsuas puas tseem ua haujlwm nyob rau hauv qhov kev xav tau. Nws tuaj yeem siv lub ntsuas ntsuas nqa tau yooj yim, ua tau - hauv kev kuaj mob, kuaj hluav taws xob, ntsuas xoom, cov txheej txheem sib npaug, lossis sib piv nrog lwm lub ntsuas.
Kev txheeb xyuas yog qhov muaj txiaj ntsig zoo rau kev saib xyuas tus mob, tab sis nws tsis tuaj yeem sib npaug rau qhov ntsuas qhov ntsuas qhov ntsuas tau.
Kev ntsuas tsis meej
Kev ntsuas qhov tsis paub meej sib xyaw ua ke cov neeg koom nrog tseem ceeb uas cuam tshuam rau cov txiaj ntsig tau tshaj tawm. Cov koom haum cuam tshuam yog nyob ntawm tus qauv ntsuas thiab tuaj yeem suav nrog cov qauv siv, rov ua dua, cov khoom siv dej, qhov ntev ntawm cov yeeb nkab, ib puag ncig, siab, kub, teeb liab ua, thiab kev teeb tsa.
TS EN ISO 5168tsim kom muaj cov ntsiab cai dav dav thiab cov txheej txheem rau kev ntsuas qhov tsis paub tseeb ntawm cov kua dej ntws los yog kom muaj nuj nqis.
Yuav ua li cas txog Multiphase Flow?
Multiphase flow muaj ntau tshaj ib theem, xws li roj hauv cov kua, kua hauv cov pa, roj thiab dej, lossis cov khoom khib nyiab nqa hauv cov kua. Standard single-phase meters may produce unstable or biased results because the fluid density, acoustic path, velocity profile, and phase distribution change continuously.
Cov pa roj me me tuaj yeem cuam tshuam rau Coriolis, ultrasonic, sib nqus, thiab DP ntsuas hauv ntau txoj kev. Cov txheej txheem hnyav lossis txhob txwm ua ntau theem yuav xav tau cov cuab yeej tshwj xeeb, cov khoom sib cais, theem- ntsuas feem, lossis daim ntawv thov- kev ntsuas tshwj xeeb.
Tsis txhob piav qhia txog ib lub 'meter' raws li tsim nyog rau multiphase flow yam tsis tau txhais:
- Cov theem tam sim no
- Qhov xav tau theem feem
- Flow regime
- Siab thiab kub
- Yuav tsum tau tso zis
- Kev lees paub tsis meej
- Seb qhov tshwm sim yuav tsum yog tag nrho ntws los yog tus kheej theem ntws
Common Flow Meter xaiv yuam kev
| yuam kev | Vim Li Cas Thiaj Tsis Tau | Txoj kev zoo dua |
|---|---|---|
| Xaiv los ntawm nominal yeeb nkab loj | Cov yeeb nkab txoj kab uas hla tsis txhais tau qhov tsawg kawg nkaus, qhov qub, lossis qhov siab tshaj plaws | Ntsuas lub 'meter' los ntawm lub hnab ntawv ua tiav thiab kev tshaj tawm |
| Siv tsuas yog qhov siab tshaj plaws ntws | Lub 'meter' tej zaum yuav tsis ruaj khov thaum lub sij hawm ib txwm xav tau lossis yam tsawg kawg nkaus | Txheeb xyuas qhov tseeb thiab teeb pom kev zoo ntawm Qmin, Qnormal, thiab Qmax |
| Kev yuav cov lus tshaj tawm qhov tseeb | Qhov tseeb txhais yuav tsis phim qhov kev khiav hauj lwm qhov tseeb | Sib piv feem pua ntawm kev nyeem ntawv, tag nrho - cov ntsiab lus ntsuas, xoom kev ruaj ntseg, thiab cov teeb meem tau teeb tsa |
| Tsis quav ntsej kev poob siab | Lub 'meter' tuaj yeem ua kom muaj zog siv lossis txo cov txheej txheem muaj peev xwm | Thov kom lub siab- poob nkhaus ntawm cov kua dej thiab cov dej ntws tiag tiag |
| Tsis quav ntsej txog kev hloov pauv dej | Kev hloov pauv hauv viscosity, ntom, conductivity, muaj pes tsawg leeg, lossis noo noo tuaj yeem hloov kev ua haujlwm | Txhais yam tsawg kawg nkaus, ib txwm, thiab dej siab tshaj plaws |
| Piv txwv tias tag nrho cov installation layouts sib npaug | Lub luj tshib, li qub, twj tso kua mis, cov kav dej ib nrab, thiab kev vibration cuam tshuam rau cov thev naus laus zis sib txawv | Tshawb xyuas qhov tseeb piping kos duab thiab phau ntawv installation ua ntej xaj |
| Kev kho calibration thiab kev txheeb xyuas zoo ib yam | Ib qho kev kuaj xyuas ua haujlwm tsis tas yuav tsim kom muaj qhov tseeb traceable | Txhais cov pov thawj xav tau, siv, cov ntsiab lus xeem, thiab kev lees txais |
| Tsis quav ntsej kev saib xyuas | Ib lub 'meter' uas tsim nyog yuav dhau los ua kim lossis tsis muaj kev nyab xeeb los kuaj xyuas | suav nrog kev rho tawm, tshem tawm, tu, kuaj mob, thiab khoom seem -ib feem nkag rau hauv kev xaiv |
Flow Meter RFQ Checklist
Npaj cov ntaub ntawv hauv qab no ua ntej nug tus neeg muag khoom los xaiv thiab loj ib lub 'meter':
- Lub npe ntawm cov kua dej thiab muaj pes tsawg leeg
- Kua, roj, ncu, slurry, los yog multiphase mob
- Yuav tsum muaj huab hwm coj txaus, ntim ntim, tshaj tawm, lub zog, lossis tag nrho cov zis
- Yam tsawg kawg nkaus, ib txwm, thiab siab kawg ntws
- Pib, yaug, ntxuav, lossis rov qab ntws
- Kev khiav hauj lwm thiab tsim kev kub ntxhov
- Kev khiav hauj lwm thiab tsim kub
- Qhov ceev thiab viscosity ntau yam
- Hluav taws xob conductivity qhov twg muaj feem xyuam
- Khoom, particles, npuas, ya raws, los yog txheej nyiam
- Cov yeeb nkab loj, lub sij hawm, cov khoom siv, hauv ob sab phlu, thiab phab ntsa thickness
- Muaj cov yeeb nkab ncaj thiab cov fittings nyob ze
- Installation orientation thiab tag nrho - yeeb nkab mob
- Yuav tsum muaj qhov tseeb, rov ua dua, lub sijhawm teb, thiab thim rov qab
- Txais kev poob siab mus tas li
- Wetted -cov ntaub ntawv thiab txheej txheem- kev sib txuas yuav tsum tau ua
- Fais fab mov, tso zis, kev sib txuas lus, thiab tso saib
- Ib puag ncig, muaj kev phom sij- thaj chaw, huv si, lossis lwm yam kev pom zoo
- Calibration, traceability, thiab kev txheeb xyuas qhov xav tau
- Kev kaw, kev saib xyuas, thiab lub neej voj voog - tus nqi txwv
Cov ntaub ntawv ua tiav tso cai rau tus neeg muag khoom kom pom zoo rau kev siv tshuab, ntsuas qhov loj me, cov khoom siv sensor, kev teeb tsa kev xa xov, kev teeb tsa, thiab kev npaj ua pov thawj. Txhawm rau xa cov xwm txheej no rau kev tshuaj xyuas cov txheej txheem, siv lubflow meter nug daim ntawv.
Cov lus nug nquag
Q: Lub ntsuas dej twg zoo tshaj rau dej?
A: Cov ntsuas magnetic yog cov neeg sib tw muaj zog rau cov dej ntws hauv cov kav dej. Ultrasonic meters feem ntau nyiam rau cov kav dej loj, kev tshawb fawb ib ntus, kev teeb tsa rov qab, thiab kev siv qhov twg txiav cov yeeb nkab yog qhov tsis xav tau. Qhov kev txiav txim siab nyob ntawm qhov conductivity, cov yeeb nkab nkag, npuas, khib nyiab, siab poob, thiab qhov yuav tsum tau muaj tseeb.
Q: Lub ntsuas dej twg yog qhov zoo tshaj plaws rau chav dej?
A: Vortex thiab qhov sib txawv - cov tshuab siab yog cov kev xaiv ntau. Kev xaiv yog nyob ntawm cov dej saturated los yog superheated chav, qis -load ntws, condensate, kev co, siab thiab kub them, ncaj yeeb nkab, thiab siab poob.
Q: Lub 'meter' twg yog qhov tsim nyog rau qis qis?
A: Cov lus teb nyob ntawm hom kua dej. Qhov zoo-Kev hloov pauv thiab Coriolis meters feem ntau suav hais tias yog cov kua dej tsawg, thaum cov ntsuas cua sov tuaj yeem tsim nyog rau cov pa roj tsawg. Lub 'meter' yuav tsum tau qhov loj me me nyob ib ncig ntawm qhov tsawg kawg nkaus ntws ntau dua li cov txheej txheem yeeb nkab txoj kab uas hla.
Q: Puas tuaj yeem ntsuas ntsuas ntsuas dej thiab roj?
A: Qee qhov Coriolis, ultrasonic, vortex, thiab sib txawv - qauv tsim muaj peev xwm raug teeb tsa rau cov kua lossis roj. Qhov no tsis tau txhais hais tias ib qho kev teeb tsa tuaj yeem txav mus los ntawm cov kua dej yam tsis muaj qhov loj me, teeb tsa, thiab kev txheeb xyuas.
Q: Thaum twg kuv yuav tsum siv lub clamp- ntawm ultrasonic flow meter?
A: Siv nws ua tus neeg sib tw muaj zog thaum cov txheej txheem tsis tuaj yeem nres, cov yeeb nkab tsis tuaj yeem raug txiav, kev poob siab yuav tsum raug zam, kev sib kis yuav tsum raug tiv thaiv, lossis yuav tsum tau ntsuas ib ntus. Paub meej cov ntaub ntawv yeeb nkab, acoustic tej yam kev mob, ntws profile, thiab teeb liab zoo ua ntej kho nws raws li qhov kawg daws.
Q: Ntev npaum li cas yuav tsum tau ntsuas ntsuas ntsuas?
A: Tsis muaj ib lub sijhawm rau txhua daim ntawv thov. Lub ncua sij hawm yuav tsum muaj kev cuam tshuam cov txheej txheem kev pheej hmoo, kev tswj hwm lossis kev xav tau zoo, keeb kwm drift, dej hnyav, kev saib xyuas keeb kwm, ntsuas ntsuas, thiab tus nqi ntawm kev nyeem ntawv tsis raug.
Q: Puas yog lub ntsuas dej loj dua muab qhov dav dua?
A: Tsis tas li. Lub bore loj dua txo qhov nrawm ntawm tib qhov ntws thiab tuaj yeem ua rau tsis muaj zog tsawg - ntws ua haujlwm. Qhov loj me me uas xaiv yuav tsum tso qhov kev ua haujlwm tiag tiag hauv lub hnab ntawv muaj txiaj ntsig zoo.
Q: Dab tsi yog qhov txawv ntawm qhov ntws sensor thiab cov khoom xa hluav taws xob ntws?
A: Lub sensor teb rau lub cev khiav dej num. Lub transmitter txheej txheem uas teeb liab thiab muab ib qho screen, analog tso zis, mem tes, tswb, digital kev sib txuas lus, los yog compensated tshwm sim. Qee cov khoom ua ke ob qho tib si ua haujlwm hauv ib lub tsev.
Xaus
Kev ntseeg tau txaus ntsuas pib nrog cov txheej txheem yuav tsum tau ua ntau dua li cov khoom catalog. Txhais lub hom phiaj ntsuas, cov khoom ua kua, ua tiav ntau yam, cov khoom tsim tawm, kev teeb tsa kev teeb tsa, cov khoom siv, lub hom phiaj kev ua haujlwm, calibration txoj kev npaj, thiab tus nqi ntawm lub neej ua ntej xaiv lub tshuab.
Siv cov xwm txheej no los tshem tawm cov thev naus laus zis tsis tsim nyog thiab tsim cov npe luv. Tom qab ntawd sib piv cov ntsuas qhov loj me, qis- tus cwj pwm ntws, qhov poob siab, kev teeb tsa tsis meej, cov kev xav tau ntawm kev saib xyuas, kev sib txuas lus, thiab kev txhawb nqa cov khoom siv. Qhov tseeb flow meter tsis yog ib qho cuab yeej uas muaj qhov tseeb tshaj tawm. Nws yog cov cuab yeej uas tuaj yeem xa cov khoom ruaj khov, txheeb xyuas tau, thiab kev ntsuas ntsuas raws li cov txheej txheem tiag tiag.
