Isilinganiso sokugeleza siyipharamitha yokulawula inqubo evame ukusetshenziswa ezinqubweni zokukhiqiza zezimboni.Njengamanje, cishe kunamamitha okugeleza ahlukene angaphezu kwe-100 emakethe.Abasebenzisi kufanele bakhethe kanjani imikhiqizo enokusebenza okuphezulu nenani?Namuhla, sizothatha wonke umuntu ukuthi aqonde izici zokusebenza zamamitha wokugeleza.
Ukuqhathaniswa kwamamitha okugeleza ahlukene
Uhlobo lwengcindezi ehlukile
Ubuchwepheshe bokulinganisa ingcindezi ehlukile okwamanje buyindlela yokulinganisa ukugeleza esetshenziswa kakhulu, engacishe ilinganise ukugeleza koketshezi lwesigaba esisodwa noketshezi ngaphansi kwezinga lokushisa eliphezulu kanye nokucindezela okukhulu ngaphansi kwezimo ezihlukahlukene zokusebenza.Ngawo-1970, lobu buchwepheshe bake babalelwa ku-80% wesabelo semakethe.I-flowmeter ye-different pressure ngokuvamile yakhiwa izingxenye ezimbili, i-throttling device kanye ne-transmitter.Imishini ye-throttle, amapuleti avamile e-orifice, imibhobho, amashubhu e-pitot, amashubhu esivinini afanayo, njll. Umsebenzi wedivayisi edonsayo uwukushwabadela uketshezi olugelezayo nokwenza umehluko phakathi komfula okhuphukayo nowehla nomfula.Phakathi kwamadivayisi ahlukahlukene wokudonsa, i-orifice plate isetshenziswa kakhulu ngenxa yesakhiwo sayo esilula nokufaka kalula.Nokho, inezidingo eziqinile ekucubunguleni ubukhulu.Uma nje icutshungulwa futhi ifakwe ngokuhambisana nezicaciso nezimfuneko, ukulinganiswa kokugeleza kungenziwa ngaphakathi kwebanga lokungaqiniseki ngemva kokufaneleka kokuhlolwa, futhi ukuqinisekiswa kwangempela koketshezi akudingeki.
Wonke amadivaysi e-throttling anokulahlekelwa kwengcindezi okungenakulungiseka.Ukulahlekelwa kwengcindezi enkulu kakhulu imbobo ebukhali ebukhali, engu-25% -40% womehluko omkhulu wethuluzi.Ukulahlekelwa kwengcindezi yeshubhu le-Pitot kuncane kakhulu futhi akunakunakwa, kodwa kuzwela kakhulu ezinguqukweni zephrofayili yoketshezi.
Uhlobo lwendawo eguquguqukayo
Ummeleli ojwayelekile walolu hlobo lwe-flowmeter yi-rotameter.Inzuzo yayo evelele ukuthi iqondile futhi ayidingi ukunikezwa kwamandla kwangaphandle lapho ikalwa esizeni.
Ama-Rotameters ahlukaniswe abe ama-rotameters engilazi kanye nama-rotameter e-metal tube ngokusho kokukhiqiza kwawo nezinto zokwakha.I-glass rotor flowmeter inesakhiwo esilula, indawo ye-rotor ibonakala ngokucacile, futhi kulula ukuyifunda.Isetshenziselwa kakhulu izinga lokushisa elivamile, ingcindezi evamile, imidiya esobala kanye negqwalayo, njengomoya, igesi, i-argon, njll. amasignali azosetshenziswa namarekhodi, njll., ukukala ukugeleza okukhulayo.
Njengamanje, kune-flowmeter yendawo eguqukayo eqondile enekhanda le-conical lasentwasahlobo elilayishiwe emakethe.Ayinalo uhlobo lokujiya kanye negumbi lebhafa.Inebanga lokulinganisa elingu-100:1 futhi inomphumela womugqa, ofaneleka kakhulu ukulinganisa umusi.
Ukunyakazisa
I-Vortex flowmeter ingummeleli ojwayelekile wamamitha wokugeleza oscillating.Iwukubeka into engahlelekile endleleni eya phambili yoketshezi, futhi uketshezi lwakha imigqa emibili evamile ye-asymmetric vortex ngemuva kwento.Imvamisa yesitimela se-vortex ilingana nesivinini sokugeleza.
Izici zale ndlela yokulinganisa azizona izingxenye ezihambayo epayipini, ukuphindaphindeka kokufundwa, ukwethembeka okuhle, impilo ende yesevisi, ububanzi bokulinganisa umugqa obanzi, cishe azithintwa izinguquko zezinga lokushisa, ingcindezi, ukuminyana, i-viscosity, njll., nokulahlekelwa kwengcindezi ephansi .Ukunemba okuphezulu (cishe 0.5% -1%).Izinga lokushisa layo lokusebenza lingafinyelela ngaphezu kuka-300 ℃, futhi ingcindezi yokusebenza kwayo ingafinyelela ngaphezu kuka-30MPa.Kodwa-ke, ukusatshalaliswa kwesivinini soketshezi kanye nokugeleza kwe-pulsating kuzothinta ukunemba kokulinganisa.
Imidiya ehlukene ingasebenzisa ubuchwepheshe obuhlukene benzwa ye-vortex.Ukuze uthole umusi, idiski edlidlizayo noma ikristalu ye-piezoelectric ingasetshenziswa.Ukuze uthole umoya, i-thermal noma i-ultrasonic ingasetshenziswa.Emanzini, cishe bonke ubuchwepheshe bezinzwa buyasebenza.Njengamapuleti e-orifice, i-vortex I-flow coefficient yemitha yokugeleza komgwaqo nayo inqunywa isethi yobukhulu.
I-electromagnetic
Lolu hlobo lwe-flowmeter lusebenzisa ubukhulu be-voltage eyenziwe lapho ukugeleza kwe-conductive kugeleza endaweni kazibuthe ukuze kutholwe ukugeleza.Ngakho-ke ilungele kuphela imidiya ye-conductive.Ngokweqile, le ndlela ayithintwa izinga lokushisa, ingcindezi, ukuminyana kanye ne-viscosity yoketshezi, isilinganiso sobubanzi singafinyelela ku-100: 1, ukunemba ku-0.5%, ububanzi bepayipi obusebenzayo busuka ku-2mm kuya ku-3m, futhi lubanzi. esetshenziswa emanzini nodaka, I-Pulp noma isilinganiso sokugeleza esiphakathi nendawo esibolayo.
Ngenxa yesignali ebuthakathaka, ii-electromagnetic flowmeterngokuvamile i-2.5-8mV kuphela esikalini esigcwele, futhi izinga lokugeleza lincane kakhulu, ama-millivolts ambalwa kuphela, angathinteka ekuphazamisekeni kwangaphandle.Ngakho-ke, kuyadingeka ukuthi indlu yesidluliseli, intambo evikelekile, ipayipi lokulinganisa, namapayipi asemikhawulweni yomibili yesidluliseli kumele kusekelwe phansi futhi kumiswe indawo ehlukile yokubeka phansi.Ungalokothi uxhume endaweni yomphakathi yamamotho, izinto zikagesi, njll.
Uhlobo lwe-ultrasonic
Izinhlobo ezivame kakhulu zamamitha okugeleza amamitha okugeleza kwe-Doppler kanye namamitha wokugeleza umehluko wesikhathi.I-Flowmeter ye-Doppler ithola izinga lokugeleza ngokusekelwe ekushintsheni kwemvamisa yamagagasi omsindo aboniswa ithagethi ehambayo oketshezini olukaliwe.Le ndlela ilungele ukukala uketshezi olunesivinini esikhulu.Akufanelekile ukulinganisa uketshezi oluphansi, futhi ukunemba kuphansi, futhi ukubushelela kodonga lwangaphakathi lwepayipi kuyadingeka ukuba kube phezulu, kodwa isifunda sayo silula.
I-flowmeter yomehluko wesikhathi ikala izinga lokugeleza ngokomehluko wesikhathi phakathi kokusakazeka okuya phambili nangemuva kwamagagasi e-ultrasonic oketshezini lomjovo.Njengoba ubukhulu bomehluko wesikhathi buncane, ukuze kuqinisekiswe ukunemba kokulinganisa, izidingo zesifunda se-elekthronikhi ziphakeme, futhi izindleko zemitha zikhuphuka ngokufanele.I-flowmeter yomehluko wesikhathi ngokuvamile ifanelekela uketshezi oluhlanzekile lwe-laminar olunenkambu yesivinini sokugeleza okufanayo.Oketshezini oluneziyaluyalu, ama-flowmeters omehluko wesikhathi we-multi-beam angasetshenziswa.
Unxande we-Momentum
Lolu hlobo lwe-flowmeter lusekelwe esimisweni sokulondoloza umzuzu womfutho.Uketshezi luthinta ingxenye ejikelezayo ukuze iyenze ijikeleze, futhi isivinini sengxenye ejikelezayo silingana nezinga lokugeleza.Bese usebenzisa izindlela ezinjengozibuthe, ukubona, nokubala kokusebenza ukuze uguqule isivinini sibe isignali kagesi ukuze ubale izinga lokugeleza.
I-Turbine flowmeter iwuhlobo olusetshenziswa kakhulu futhi olunembe kakhulu lwalolu hlobo lwensimbi.Ifanele igesi kanye nemithombo ye-liquid, kodwa ihluke kancane ngesakhiwo.Ngegesi, i-impeller angle yayo incane futhi inani lama-blade likhulu., Ukunemba kwe-flowmeter ye-turbine kungafinyelela ku-0.2% -0.5%, futhi ingafinyelela ku-0.1% ebangeni elincane, futhi isilinganiso sokujika singu-10:1.Ukulahlekelwa kwengcindezi kuncane futhi ukumelana nokucindezela kuphezulu, kodwa kunezidingo ezithile ekuhlanzekeni koketshezi, futhi kuthinteka kalula ukuminyana kanye ne-viscosity yoketshezi.I-diameter yembobo encane, umthelela omkhulu.Njengepuleti le-orifice, qinisekisa ukuthi kukhona okwanele ngaphambi nangemuva kwendawo yokufaka.Isigaba sepayipi esiqondile ukugwema ukuzungezisa uketshezi futhi ushintshe i-engeli yesenzo ku-blade.
Ukufuduka okuhle
Isimiso sokusebenza salolu hlobo lwensimbi silinganiswa ngokuvumelana nokunyakaza okunembile kwenani elinqunyiwe loketshezi ngakunye ukuphenduka okukodwa komzimba ojikelezayo.Ukwakhiwa kwensimbi kuhlukile, njenge-oval gear flowmeter, i-rotary piston flowmeter, i-scraper flowmeter nokunye.Ububanzi be-oval gear flowmeter bukhulu kakhulu, obungafinyelela ku-20: 1, futhi ukunemba kuphezulu, kodwa igiya elihambayo kulula ukunamathela ukungcola oketshezini.Izinga lokugeleza kweyunithi le-rotary piston flowmeter likhulu, kodwa ngenxa yezizathu zesakhiwo, ivolumu yokuvuza iphakeme kakhulu.Okukhulu, ukunemba okubi.I-flowmeter enhle ngokuyisisekelo izimele ku-viscosity yoketshezi, futhi ifanele imidiya efana negrisi namanzi, kodwa ayifanele imidiya efana nesitimu nomoya.
I-flowmeters ngayinye eshiwo ngenhla inezinzuzo zayo kanye nokubi, kodwa noma ngabe iwuhlobo olufanayo lwamamitha, imikhiqizo ehlinzekwa abakhiqizi abahlukene inokusebenza okuhlukile kwesakhiwo.
Isikhathi sokuthumela: Dec-15-2021