Kev ntsuas dej ntws ua lub luag haujlwm tseem ceeb hauv cov txheej txheem kev lag luam niaj hnub no. Ntawm ntau yam kev ntsuas ntsuas dej muaj nyob rau hauv kev ua lag luam niaj hnub no, Electromagnetic Flow Meter (feem ntau hu ua mag meter) yog ib qho ntawm cov cuab yeej siv dav tshaj plaws rau kev ntsuas cov kua dej.
Dab tsi yog Electromagnetic Flowmeter?
A magnetic flow meterntsuas tus nqi ntws ntawm cov kua conductive siv Faraday Txoj Cai ntawm Electromagnetic Induction. Thaum ib tug conductive kua ntws los ntawm ib tug magnetic teb, ib tug voltage yog induced uas yog proportional rau tus khiav tshaj tawm.
Tus qauv tsim
Ib tug raug electromagnetic flow meter muaj ndlwg tube (lined nrog insulating khoom), electrodes (kom ntes induced voltage), magnetic teb coils, teeb liab converter / transmitter.
Thaum cov kua hluav taws xob ntws los ntawm qhov chaw sib nqus, lub teeb liab hluav taws xob tsim tawm thiab kuaj pom los ntawm electrodes. Lub transmitter ces converts lub teeb liab no mus rau ib tug txaus tus nqi tso zis.
Qhov zoo ntawm Electromagnetic Flow Meters
Electromagnetic flow meter muaj ntau yam txiaj ntsig hauv kev ntsuas kev lag luam.
Kev siv hluav taws xob tsawg
Mag meters feem ntau xav tau lub zog ua haujlwm qis, ua rau lawv ua haujlwm tau ntev - lub sijhawm ua haujlwm.
Haum rau Kev Tshaj Tawm nyuaj
Lawv tuaj yeem ntsuas cov dej haus, kua dej qias neeg, kua corrosive, slurries, los yog kua- cov khoom sib tov.
Piv txwv li, dej khib nyiab, pulp slurry, mining slurry, thiab tshuaj kua dej.
Tsis cuam tshuam los ntawm Fluid Properties
Nyob rau hauv ib tug tej yam conductivity ntau yam, qhov ntsuas tsis cuam tshuam los ntawm:
- Kub
- viscosity
- Qhov ntom
- Siab
Qhov no ua rau lawv txhim khu kev qha nyob rau hauv complex industrial puag ncig.
Kev ntsuas dav dav
Electromagnetic flow meter muaj qhov sib npaug loj heev:
Qhov sib txawv: 100: 1
Qee cov qauv tsim: mus txog 1000: 1
Teb ceev ceev
Vim tias tsis muaj qhov txav mus los, mag meters muaj:
- Tsis muaj mechanical inertia
- Teb ceev ceev
- Muaj peev xwm ntsuas pulsating flow
- Muaj peev xwm ntsuas rau pem hauv ntej thiab rov qab ntws
- Qhov Loj Loj Loj Loj heev
Muaj electromagnetic flow meter tuaj yeem npog cov yeeb nkab diameters los ntawm DN10-DN3000mm. Qhov no ua rau lawv haum rau ob qho tib si kev siv hauv chav kuaj thiab cov kav dej loj hauv nroog.
Disadvantages ntawm Magnetic Flowmeters
Txawm tias lawv qhov zoo, electromagnetic flow meters kuj muaj ntau qhov kev txwv.
Lawv tsis tuaj yeem ntsuas tsis yog-cov kua ua kua, roj, nkev lossis kua uas muaj roj ntau, lawv kuj ntsuas tsis tau cov kua conductivity tsawg heev, xws li cov khoom siv roj av, cov kuab tshuaj organic.
Tsis tas li ntawd, vim muaj kev txwv ntawm cov ntaub ntawv hauv ob sab phlu thiab hluav taws xob rwb thaiv tsev, tus qauv mag meters tsis haum rau siab heev -kub dej los yog tsis tshua muaj kub - ib puag ncig kub. Tsis tshua muaj kub yuav ua rau condensation los yog Frost, uas yuav ua rau puas rwb thaiv tsev.
Kev khiav hauj lwm tej yam kev mob thiab installation yuav tsum tau
Txhawm rau kom ntsuas qhov tseeb, cov xwm txheej hauv qab no yuav tsum txaus siab:
Lub magnetic teb yuav tsum ruaj khov thiab sib npaug.
Cov dej nrawm profile yuav tsum yog axisymmetric.
Cov kua yuav tsum tsis yog -magnetic, sib xws hauv conductivity
Lub raj ntsuas yuav tsum tau ntim tag nrho nrog cov kua (tshwj tsis yog siv ib feem ntawm cov yeeb nkab tsim).
Cov kua yuav tsum muaj tib lub peev xwm hluav taws xob zoo ib yam li hauv av, yog li yuav tsum muaj kev tsim nyog hauv av.
Tej Faults thiab Troubleshooting
1. Teeb meem kev teeb tsa
Muaj ntau qhov tsis ua haujlwm tshwm sim vim kev teeb tsa tsis raug.
Tej yam yuam kev muaj xws li:
Txhim kho lub sensor ntawm qhov siab tshaj plaws ntawm lub raj xa dej uas huab cua nkag mus
Kev txhim kho ntawm cov kav dej ntsug hauv qab, uas tuaj yeem ua rau cov yeeb nkab khoob
Tsis muaj lub siab rov qab, ua rau cov yeeb nkab tsis nyob puv
Cov teeb meem no ua rau cov ntawv nyeem tsis ruaj khov lossis tsis raug.
2. Kev cuam tshuam ib puag ncig
Cov chaw cuam tshuam feem ntau suav nrog:
- Cov dej tsis huv hauv cov kav dej
- Muaj zog electromagnetic vuag
- Sib nqus teb los ntawm cov motors loj
Cov kev daws teeb meem suav nrog:
- Kev ywj pheej grounding
- Hluav taws xob cais ntawm sensor thiab pipeline
- Shielded teeb liab cables
3. xob laim
Hluav taws xob tuaj yeem ua kom pom qhov hluav taws xob siab dhau los ntawm:
- Cov kab hluav taws xob
- Excitation coils
- Cov kab hluav taws xob
Kev tiv thaiv surge thiab grounding yog tsim nyog.
4. Kev hloov ib puag ncig
Qee lub sij hawm lub ntsuas dej ntws ua haujlwm kom raug thaum lub sijhawm ua haujlwm tab sis tom qab ntawd pom cov cim tsis ruaj khov vim muaj kev hloov pauv ib puag ncig, xws li:
- Kev ua haujlwm vuam nyob ze
- Tshiab tsim transformers
- Cov khoom siv hluav taws xob tshiab
Cov no tuaj yeem qhia txog kev cuam tshuam uas tsis xav txog.
Yam tseem ceeb ntawm Electromagnetic Flow Meters
Electromagnetic flow meter tuaj yeem faib ua ntau txoj hauv kev.
Los ntawm Cov Qauv
Integral hom: sensor thiab transmitter yog kev koom ua ke.
Chaw taws teeb (split{0}}type): sensor thiab transmitter raug ntsia sib cais.
Los ntawm Installation Method
Flange kev twb kev txuas
Threaded kev twb kev txuas
Clamp kev twb kev txuas
Wafer (sandwich) hom
Los ntawm Kev Siv Hluav Taws Xob thiab Kev Sib Txuas Lus
RS485 kev sib txuas lus
GPRS chaw taws teeb kis tau tus mob
Roj teeb - siv zog ua haujlwm
Qee cov qauv kuj suav nrog kev saib xyuas siab thiab kev sib txuas lus cov ntaub ntawv nyob deb
Hom Kev Siv Ntau Yam
Loj Loj (300mm - 1000mm)
Feem ntau siv hauv:
Municipal dej muab
Cov dej ntws
Cov nroj tsuag kho dej
Nruab nrab txoj kab uas hla (50 mm - 250 mm)
Cov ntawv thov uas muaj xws li:
Pulp thiab dej cawv dub hauv cov ntawv zeb
Mining slurry
Coal slurry hauv thee npaj cov nroj tsuag
Corrosive kua hauv cov nroj tsuag tshuaj
Blast furnace dej txias
Hydraulic thee thauj pipelines
Me Txoj kab uas hla (< 50 mm)
Siv hauv kev lag luam uas xav tau kev tu cev:
Kev lag luam kws tshuaj
Kev ua zaub mov
Biotechnology
Laboratory applications
Yuav Ua Li Cas Xaiv Txoj Cai Electromagnetic Flow Meter
Thaum xaiv lub ntsuas hluav taws xob electromagnetic, ntau qhov tseem ceeb yuav tsum tau txiav txim siab.
Cov Ntsiab Cai Xaiv
- Ntsuas nruab nrab
- Txoj kab uas hla
- Kub
- Siab
- Flow range
- Fais fab mov
- Tso zis teeb liab
- Txoj kev teeb tsa
Kev Taw Qhia Kev Xaiv Ceev
|
Parameter |
Yuav kuaj xyuas dab tsi |
Sau ntawv |
|
Nruab nrab |
conductivity ntawm kua |
Yuav tsum yog conductive |
|
Cov yeeb nkab loj |
Txoj kab uas hla ntawm cov kav dej |
Txiav txim qhov loj me me |
|
Flow Range |
Yam tsawg kawg & siab kawg ntws |
Yuav tsum sib npaug 'meter' |
|
Kub |
Nruab nrab kub |
Nyob ntawm cov khoom siv hauv ob sab phlu |
|
Siab |
Ua hauj lwm siab |
Rated siab yuav tsum yog 1.5 × ua hauj lwm siab |
|
Qib tiv thaiv |
Kev teeb tsa ib puag ncig |
Siv IP68 yog tias muaj kev pheej hmoo dej nyab |
|
Kev tiv thaiv tawg |
Cov chaw muaj kev phom sij |
Xaiv qhov tawg- qauv pov thawj |
Vim li cas Electromagnetic Flow Meters tau siv dav
Electromagnetic flow meter tau dhau los ua cov cuab yeej tseem ceeb hauv ntau qhov kev lag luam, suav nrog:
- Kev tswj kev lag luam
- Kev ntsuas hluav taws xob
- Kev saib xyuas ib puag ncig
- Kev thauj mus los
- Kev tsim tshuaj
- Kev tshawb fawb
- Kev soj ntsuam Oceanographic
- Dej thiab pas dej saib xyuas
Lawv txoj kev ntseeg siab, kev saib xyuas tsis zoo, thiab kev muaj peev xwm los ntsuas cov kua dej nyuaj ua rau lawv yog ib qho tseem ceeb tshaj plaws ntawm kev ntsuas ntsuas thev naus laus zis hauv kev lag luam niaj hnub no.
Xaus
Thaum xaiv thiab ntsia tau zoo, cov ntsuas hluav taws xob electromagnetic flowmeter tuaj yeem xa cov neeg siab, kev saib xyuas tsawg, thiab kev ua haujlwm zoo, ua rau lawv xaiv rau kev ntsuas kev lag luam niaj hnub no.
Hu rau peb Hnub no rau kev xaiv tus qauv thiab kev taw qhia kev teeb tsa.