Imitha yokuhamba kwe-electromagnetic (imitha yokuhamba kwe-magnetic) ilinganisa izinga lokuhamba kolwelo oluqhubayo olusekelwe kuMthetho kaFaraday wokungenisa i-Electromagnetic. Ngokungafaniyo neemitha zokuhamba kwe-mechanical, ayinazo iindawo ezihambayo kwaye ayibangeli naluphi na uthintelo ngaphakathi kombhobho, nto leyo eyenza ukuba isetyenziswe kakhulu emanzini, emanzini amdaka, kwiikhemikhali, kwi-slurry, nakwezinye iinkqubo zokusetyenziswa kolwelo oluqhubayo.
Umgaqo osisiseko kukuba xa ulwelo oluqhubayo luhamba kwi-magnetic field, luvelisa i-voltage encinci yombane. I-electromagnetic flow meter iyayibona le voltage ize iyiguqule ibe yi-flow velocity kunye ne-flow rate value.
Umgaqo oSebenzayo weMitha yokuHamba kwe-Electromagnetic
Inkqubo yokulinganisa ibandakanya izinto ezintathu eziphambili:
1. Ukuveliswa kwentsimi yeMagnetic
2. Ukufunyanwa kweVoltage zii-electrodes
3. Ubalo lokuhamba komjelo ngumguquli
1. Ukudala iSidima seMagnetic ngaphakathi kwiThubhu yokuMeasure
Ngaphakathi kwi-sensor ye-flow meter ye-electromagnetic, ii-electromagnetic coils zivelisa i-magnetic field kwityhubhu yokulinganisa.
I-sensor liner ikhupha ulwelo emzimbeni wombhobho wesinyithi ngombane, ngelixa ii-electrode ezimbini zifakelwe kumacala ahlukeneyo embhobho wokulinganisa ukuze kufunyanwe i-voltage eyenziweyo.
Xa kungekho manzi ahambayo, akukho ntshukumo yee-conductive particles kwi-magnetic field, ngoko ke akukho voltage elinganiswayo eveliswayo.
2. Ukuvelisa iSignali yoMbane evela kwiNtshukumo yoLwelo
Xa ulwelo oluqhubayo luhamba ngemagnethi, amasuntswana atshajiweyo ngaphakathi kolwelo ahamba kwimigca yemagnethi.
Ngokutsho koMthetho kaFaraday:
* Ulwelo oluhambayo oluqhubayo lusebenza njengomqhubi.
* Intsimi yemagnethi ibangela isignali yevolthi.
* I-voltage ihambelana nesantya solwelo.
Ii-electrode ezifakwe kwi-sensor zibona esi siginali ye-voltage.
Okukhona ulwelo luhamba ngokukhawuleza, kokukhona i-voltage ebangelwayo iya kuba phezulu.
3. Ukuguqula iSignali ibe yiFlow Rate
Isiguquli sifumana isignali ye-voltage encinci kakhulu evela kwii-electrodes kwaye siyicubungula ngeesekethe ze-elektroniki.
Umguquli ubala:
* Isantya sokuhamba
* Isantya sokuhamba ngokukhawuleza
* Umthamo oqokelelweyo iyonke
Isiphumo sokugqibela singaboniswa kwindawo okanye sidluliselwe ngeendlela zonxibelelwano ezifana nezi:
* 4–20 mA
* I-RS485 Modbus
* I-HART
* Isiphumo sePulse
* Iiprotokholi zonxibelelwano lwedijithali
Zeziphi Izinto Ezichaphazela Ukulinganiswa Kokuhamba Kwe-Electromagnetic?
Nangona iimitha zokuhamba kwe-electromagnetic zithembeke kakhulu, iimeko ezininzi zibalulekile ukuze kulinganiswe ngokuchanekileyo.
1. Ukuqhuba kolwelo
Ulwelo kufuneka lube nombane owaneleyo ukuze luvelise isignali enokulinganiswa.
Imfuneko eqhelekileyo:
Ukuqhuba kombane ≥ 5 μS/cm
Izinto ezifanelekileyo zolwelo ziquka:
* Amanzi
* Amanzi amdaka
* Izisombululo zeekhemikhali
* Udaka
* Intlama
Ayifanelekanga:
* Ioyile
* Ipetroli
* Ipetroli
* Ezinye izinto ezingezizo ezokuhambisa umbane
2. Umbhobho Umele Ugcwale Ngokupheleleyo
Umbhobho wokulinganisa kufuneka usoloko uzaliswe lulwelo.
Ukuba umbhobho awunanto ingako:
* Ii-electrode zisenokungadibani ngokupheleleyo nolwelo.
* Isignali ayizinzanga.
* Ukuchaneka kokulinganisa kwehla.
Ngenxa yesi sizathu, kuphephe ukufaka iimitha zokuhamba kwe-electromagnetic:
* Kwindawo ephezulu yombhobho.
* Ngaphambi kwendawo yokukhupha amanzi yasimahla.
* Kwiindawo apho umoya unokuqokelelana khona.
3. Ukusekela kakuhle
Ngenxa yokuba isignali yokulinganisa incinci kakhulu, kubalulekile ukuyibeka phantsi.
Ukubeka isiseko esifanelekileyo kuyanceda:
* Susa ukuphazamiseka kombane.
* Zinzisa inqaku elingu-zero.
* Phucula ukuthembeka kokulinganisa.
Iiringi zokumisa umhlaba zingafuneka xa:
* Iipayipi zeplastiki.
* Iipayipi ezifakwe ngerabha.
* Imibhobho engahambisi umbane.
Kutheni i-Electromagnetic Flow Meter ingenalo ilahleko yoxinzelelo?
Enye inzuzo enkulu yeemitha zokuhamba kwe-electromagnetic kukuba akukho zinto zishukumayo okanye izithintelo zangaphakathi.
Ububanzi bangaphakathi be-sensor buphantse bufane nobubanzi bombhobho, nto leyo evumela ukuba ulwelo ludlule ngokukhululekileyo.
Iingenelo ziquka:
* Akukho lahleko yoxinzelelo olongezelelweyo.
* Ifanelekile kwiipayipi ezinkulu ngobukhulu.
* Iimfuno zolondolozo eziphantsi.
* Ukusebenza kakuhle xa usebenzisa ulwelo olunezimbiwa ezixotyulweyo.
Oku kwenza iimitha zokuhamba kwe-electromagnetic zifaneleke kakhulu:
* Izityalo zokunyanga amanzi amdaka.
* Iinkqubo zokusasaza amanzi.
* Izicelo zokwemba.
* Amashishini ephepha kunye ne-pulp.
Ngaba i-Electromagnetic Flow Meter ingalinganisa i-Reverse Flow?
Ewe.
Uninzi lweemitha zokuhamba nge-electromagnetic zinokulinganisa ukuhamba kwe-bidirectional.
Ngokuxhomekeke kuqwalaselo, imitha inga:
* Bonisa ukuhamba phambili.
* Bonisa ukuhamba okungasemva.
* Bala ukuhamba kwenani lilonke kwiindlela ezahlukeneyo.
Olu phawu luluncedo kwizicelo apho indlela yokuhamba inokutshintsha khona, ezifana:
* Iinkqubo zokujikeleza kwamanzi.
* Uvavanyo lwepompo.
* Imibhobho yenkqubo yemizi-mveliso.
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Iingenelo zeeMeter ze-Electromagnetic Flow
Iimitha zokuhamba kwe-electromagnetic zibonelela ngeenzuzo ezininzi:
Ukuchaneka Okuphezulu
Zinokubonelela ngomlinganiselo ozinzileyo nochanekileyo xa zifakwe ngokufanelekileyo.
Akukho Zinto Zishukumayo
Akukho zi-impellers okanye izinto zoomatshini ezinokuguga.
Ifanelekile kwiilwelo ezingcolileyo
Banokulinganisa ulwelo oluqulethe:
* Izinto eziqinileyo ezixhonyiweyo
* Iifayibha
* Amasuntswana enkunkuma
Uluhlu olubanzi lwesicelo
Izicelo eziqhelekileyo ziquka:
* Ubonelelo lwamanzi lukaMasipala
* Unyango lwamanzi amdaka
* Ukulungiswa kweekhemikhali
* Ukutya neziselo
* Ukwemba imigodi
* Ukunkcenkceshela
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Imida yeeMeter ze-Electromagnetic Flow
Nangona ziluncedo, iimitha zokuhamba nge-electromagnetic zinemida ethile:
Ayikwazi ukulinganisa ulwelo olungenakho ukukhupha umoya
Izinto ezilulwelo ezifana neoyile kunye namafutha azivelisi zimpawu zombane ezaneleyo.
Funa Ufakelo Olufanelekileyo
Ukufakelwa gwenxa, umhlaba ongavuthwanga kakuhle, okanye amaqamza omoya kunokuchaphazela uzinzo lokulinganisa.
Funa iMedia eqhubayo
Ukuqhuba kolwelo kufuneka kuhlolwe ngaphambi kokukhetha.
Imitha yokuhamba kwe-electromagnetic ilinganisa ukuhamba kwe-flow ngokusebenzisa uMthetho kaFaraday we-Electromagnetic Induction. Xa ulwelo oluqhubayo ludlula kwi-magnetic field, luvelisa isignali ye-voltage efunyanwa zii-electrodes. I-converter icubungula le signali ize ibale isantya sokuhamba kwe-flow kunye nesantya sokuhamba kwe-flow.
Ngenxa yokuba ayinazo izinto ezihambayo, imfuneko ephantsi yokugcinwa, kunye nokusebenza kakuhle kakhulu kunye nolwelo oluqhuba umbane, imitha yokuhamba kwe-electromagnetic isetyenziswa kakhulu emanzini, emanzini amdaka, kwiikhemikhali nakwiinkqubo zoshishino.
Ukuze ulinganise ngokuthembekileyo, soloko uqinisekisa ukuba ulwelo luhamba kakuhle, umbhobho uhlala ugcwele ngokupheleleyo, kwaye kubonelelwa ngomgangatho ofanelekileyo.
Ixesha leposi: Julayi-27-2026