Hauv cov lag luam uas kev ntsuas cov kua dej kom raug yog qhov tseem ceeb rau kev nyab xeeb, zoo, thiab kev ua haujlwm zoo—tshwj xeeb tshaj yog thaum cuam tshuam nrog cov kua dej conductive—kev xaiv lub ntsuas dej kom raug tuaj yeem ua rau kev ua haujlwm zoo lossis tawg. Cov kua dej conductive, los ntawm cov kua txiv hmab txiv ntoo hauv kev tsim khoom noj mus rau cov kuab tshuaj hauv kev tsim tshuaj thiab cov roj nyoos hauv cov nroj tsuag petrochemical, xav tau kev daws teeb meem ntsuas uas raug, tsis cuam tshuam, thiab sib xws nrog lawv cov khoom tshwj xeeb. Cov ntsuas dej electromagnetic (feem ntau hu ua "magmeters") sawv tawm ua qhov haum zoo meej: lawv cov thev naus laus zis tau tsim rau cov kua dej conductive, thiab lawv tus qauv tsim teb rau cov kev cai nruj ntawm cov khoom noj, tshuaj, thiab petrochemical.
Lub hauv paus ntawm qhov tsim nyog ntawm cov ntsuas hluav taws xob electromagnetic rau cov kua dej conductive yog Faraday Txoj Cai ntawm Electromagnetic Induction. Tsis zoo li cov ntsuas hluav taws xob uas vam khom cov khoom txav mus los (uas tuaj yeem txhaws, hnav, lossis ua rau cov kua dej conductive paug), magmeters siv cov teeb tsa tsis cuam tshuam: ib lub yeeb nkab uas muaj cov khoom rwb thaiv tsev, puag ncig los ntawm electromagnetic coils. Thaum cov kua dej conductive ntws los ntawm lub yeeb nkab, nws txiav los ntawm lub zog sib nqus tsim los ntawm cov coils, tsim kom muaj hluav taws xob me me. Qhov loj ntawm qhov hluav taws xob no yog ncaj qha rau qhov ceev ntawm cov kua dej - tso cai rau lub 'meter' xam tus nqi ntws nrog qhov tseeb tshwj xeeb (feem ntau ± 0.5% ntawm kev nyeem ntawv, thiab txawm tias ± 0.1% rau cov qauv siab). Qhov kev tsim no tshem tawm kev sib cuag ntawm cov khoom ntsuas ntawm lub 'meter' thiab cov kua dej, qhov zoo tseem ceeb rau cov kua dej conductive uas yuav xeb, viscous, lossis yooj yim tawm cov khoom seem.
Rau kev lag luam khoom noj, qhov twg kev huv thiab kev huv ntawm cov khoom tsis tuaj yeem sib tham tau, cov ntsuas hluav taws xob electromagnetic yog qhov hloov pauv qhov kev ua si. Cov kua dej conductive xws li kua txiv hmab txiv ntoo, cov khoom noj mis nyuj, cov kua ntses, thiab cov kua txiv hmab txiv ntoo xav tau cov khoom siv uas ua tau raws li FDA (Food and Drug Administration) lossis EU 10/2011 cov qauv nruj kom tsis txhob muaj kuab paug. Cov ntaub mos mos ntawm Magmeters (feem ntau ua los ntawm cov khoom siv qib zaub mov xws li PTFE lossis ETFE) tiv thaiv cov kua dej kom tsis txhob muaj kuab paug thiab yooj yim ntxuav - tseem ceeb rau kev tiv thaiv kev loj hlob ntawm cov kab mob ntawm kev tsim khoom. Piv txwv li, hauv lub Hoobkas dej haus loj, magmeters siv los ntsuas qhov ntws ntawm cov kua dej conductive mus rau hauv cov thoob sib tov: lawv qhov tseeb ua kom muaj qhov qab zib sib xws thoob plaws cov pawg, thaum lawv cov qauv tsim tsis cuam tshuam tshem tawm qhov kev pheej hmoo ntawm cov hlau me me (los ntawm cov khoom siv kho tshuab hnav) ua rau cov khoom puas tsuaj. Tsis tas li ntawd, magmeters tswj cov viscosity siab ntawm cov kua dej xws li chocolate lossis zib ntab yam tsis muaj kev txhaws, qhov teeb meem feem ntau nrog cov ntsuas ib txwm muaj uas vam khom impellers.
Cov chaw ua tshuaj muaj cov kev cai nruj dua, vim tias cov kua dej conductive (xws li cov tshuaj kua, dej huv, thiab cov tshuaj yaj) yuav tsum ua tau raws li cov qauv kev tswj hwm zoo thiab kev taug qab. Cov ntsuas hluav taws xob electromagnetic zoo tshaj plaws ntawm no los ntawm kev muab cov kev ntsuas tseeb, rov ua dua - qhov tseem ceeb rau kev ua kom ntseeg tau tias cov tshuaj muaj cov tshuaj sib xyaw kom raug. Lawv txoj kev tsim tsis cuam tshuam kuj txhawb nqa kev ua kom huv: vim tias tsis muaj cov khoom txav mus los hauv cov yeeb nkab, tsis muaj kev pheej hmoo ntawm kev tsim cov khoom me me lossis kev sib kis ntawm cov pawg. Piv txwv li, ib lub tuam txhab tsim tshuaj uas tsim cov tshuaj txhaj, siv magmeters los saib xyuas cov dej ntws ntawm cov kua dej conductive mus rau hauv cov vials. Cov ntsuas 'real-time data transmission tso cai rau cov nroj tsuag taug qab txhua kauj ruam ntawm cov txheej txheem, xyuas kom meej tias ua raws li cov koom haum tswj hwm xws li FDA thiab EMA (European Medicines Agency). Ntxiv mus, magmeters tiv taus cov neeg ua haujlwm ntxuav hnyav (xws li hydrogen peroxide) siv hauv cov chaw tsim tshuaj, ua kom ntseeg tau tias muaj kev ntseeg siab mus sij hawm ntev.
Hauv kev lag luam petrochemical, qhov twg cov kua conductive yog los ntawm roj av nyoos thiab roj av mus rau cov kuab tshuaj hauv kev lag luam thiab cov dej khib nyiab, cov ntsuas hluav taws xob electromagnetic flow meters daws qee qhov kev ntsuas nyuaj tshaj plaws. Kev xeb yog qhov txhawj xeeb tseem ceeb ntawm no - ntau cov kua petrochemical yog corrosive heev, thiab cov ntsuas tshuab nrog cov khoom hlau tuaj yeem lwj sai, ua rau kev nyeem tsis raug thiab xau kim. Cov ntaub thaiv xeb tiv taus Magmeters (xws li roj hmab lossis ceramic) thiab cov khoom tsis yog hlau ntub dej tiv taus cov kua hnyav no, txuas ntxiv lawv lub neej mus txog 10-15 xyoo (piv rau 3-5 xyoo rau cov ntsuas tshuab). Tsis tas li ntawd, cov nroj tsuag petrochemical feem ntau ua haujlwm nyob rau hauv qhov siab siab thiab kub, thiab magmeters muaj nyob rau hauv cov qauv tsim rugged uas tswj cov siab txog li 1,000 bar thiab kub ntawm -40 ° C txog 200 ° C. Piv txwv li, lub chaw ua roj siv magmeters los ntsuas qhov ntws ntawm cov roj nyoos conductive los ntawm cov kav dej: lawv qhov tseeb pab ua kom zoo dua cov txheej txheem ua roj, txo cov khib nyiab, thiab xyuas kom muaj kev thauj mus los zoo - tseem ceeb rau kev tiv thaiv kev nchuav ib puag ncig thiab ua raws li cov cai kev nyab xeeb.
Txawm hais tias cov ntsuas hluav taws xob muaj tus nqi siab dua li lwm txoj hauv kev siv tshuab, lawv cov txiaj ntsig mus sij hawm ntev rau cov khoom noj, tshuaj, thiab petrochemical ntau dua li qhov kev nqis peev no. Txo cov nqi kho (tsis muaj qhov txav mus los hloov), tsawg dua cov khoom rov qab hu (vim yog kev tiv thaiv kev ua qias tuaj), thiab txhim kho kev ua haujlwm zoo (los ntawm cov ntaub ntawv raug) ua rau muaj kev rov qab los ntawm kev nqis peev hauv 2-3 xyoos. Rau cov lag luam uas txawm tias qhov yuam kev me me tuaj yeem muaj cov txiaj ntsig loj heev - los ntawm cov khoom noj puas tsuaj mus rau cov tshuaj tsis zoo lossis kev puas tsuaj ib puag ncig - magmeters tsis yog tsuas yog ib qho cuab yeej xwb, tab sis yog kev tiv thaiv.
Raws li cov khoom noj khoom haus, tshuaj, thiab petrochemical sectors txuas ntxiv mus hloov pauv, nrog rau cov kev cai nruj dua thiab kev thov kom muaj kev ruaj khov, cov ntsuas hluav taws xob electromagnetic flow meters tseem yog tus qauv kub rau kev ntsuas cov kua dej conductive. Lawv lub peev xwm los ua ke qhov tseeb, kev huv, thiab kev ruaj khov ua rau lawv tsis tseem ceeb rau kev ua kom cov khoom zoo, kev nyab xeeb ua haujlwm, thiab kev ua raws li ib puag ncig. Rau txhua qhov chaw ua haujlwm nrog cov kua dej conductive, magmeters yog ntau tshaj li qhov kev daws teeb meem ntsuas - lawv yog tus tsav tsheb tseem ceeb ntawm kev vam meej hauv thaj chaw sib tw, tswj hwm.
Lub sijhawm tshaj tawm: Lub Kaum Hli-20-2025