Dab tsi yog Vortex Flow Meter?

Lub vortex meter yog ib hom volumetric flow meter uas ua rau siv lub ntuj phenomenon uas tshwm sim thaum cov kua ntws nyob ib ncig ntawm cov khoom bluff.Vortex flow meter ua haujlwm raws li txoj cai vortex shedding, qhov twg vortices (los yog eddies) yog los ntawm alternated downstream ntawm cov khoom.Qhov zaus ntawm lub vortex shedding yog ncaj qha proportional rau qhov tshaj tawm ntawm cov kua ntws los ntawm lub 'meter'.

Vortex flow meter yog qhov zoo tshaj plaws rau kev ntsuas ntsuas qhov kev taw qhia ntawm cov khoom txav mus los nthuav qhia cov teeb meem.Lawv muaj nyob rau hauv qib industrial, tooj dag, los yog tag nrho cov yas siv.rhiab heev rau variations nyob rau hauv cov txheej txheem tej yam kev mob yog tsawg thiab, tsis muaj txav qhov chaw, kuj tsis tshua muaj hnav piv rau lwm yam flowmeter.

Vortex Flow Meter Design

Lub vortex flow meter feem ntau yog ua los ntawm 316 stainless hlau lossis Hastelloy thiab suav nrog lub cev bluff, lub vortex sensor sib dhos, thiab cov khoom siv hluav taws xob xa mus - txawm hais tias tom kawg kuj tuaj yeem txuas tau nyob deb (Daim duab 2).Lawv feem ntau muaj nyob rau hauv flange qhov ntau thiab tsawg los ntawm ½ in. mus rau 12 in. Tus nqi nruab ntawm vortex meters yog kev sib tw nrog cov orifice meters hauv qhov ntau thiab tsawg dua rau ntiv tes.Wafer lub cev ntsuas (flangeless) muaj tus nqi qis tshaj plaws, thaum flanged meters yog qhov nyiam yog tias cov txheej txheem cov kua dej muaj kev phom sij lossis kub kub.

Bluff lub cev duab (square, rectangular, t-shaped, trapezoidal) thiab qhov ntev tau sim ua kom tiav cov yam ntxwv xav tau.Kev ntsuam xyuas tau pom tias qhov linearity, tsawg Reynolds tus lej txwv, thiab rhiab heev rau kev tshaj tawm profile distortion sib txawv me ntsis nrog lub cev lub cev.Raws li qhov loj me, lub cev bluff yuav tsum muaj qhov dav uas yog qhov loj txaus ntawm cov yeeb nkab txoj kab uas hla uas tag nrho cov dej ntws tau koom nrog hauv kev tso tawm.Qhov thib ob, lub cev bluff yuav tsum muaj cov npoo ntawm lub ntsej muag sab saud txhawm rau txhim kho cov kab sib cais, tsis hais tus nqi ntws.Thib peb, lub bluff lub cev ntev nyob rau hauv cov kev taw qhia ntawm lub ntws yuav tsum yog ib tug tej yam ntau yam ntawm lub bluff lub cev dav.

Niaj hnub no, feem ntau ntawm cov vortex meters siv piezoelectric los yog capacitance-type sensors los xyuas txog lub siab oscillation nyob ib ncig ntawm lub bluff lub cev.Cov cuab yeej ntsuas no teb rau lub siab oscillation nrog lub teeb liab tsis tshua muaj hluav taws xob tso tawm uas muaj qhov zaus tib yam li oscillation.Xws li cov sensors yog modular, pheej yig, hloov tau yooj yim, thiab tuaj yeem ua haujlwm nyob rau ntau qhov kub thiab txias - los ntawm cov kua dej cryogenic mus rau qhov cub superheated.Sensors tuaj yeem nyob hauv lub ntsuas lub cev lossis sab nraud.Wetted sensors raug kev ntxhov siab ncaj qha los ntawm vortex siab hloov pauv thiab tau muab ntim rau hauv cov ntaub ntawv tawv tawv kom tiv taus corrosion thiab yaig los.

Sab nraud sensors, feem ntau yog piezoelectric strain gages, paub qhov vortex los ntawm kev quab yuam los ntawm lub shedder bar.Sab nraud sensors nyiam nyob rau hauv daim ntawv thov heev erosive / corrosive kom txo tau cov nqi txij nkawm, thaum lub sensors sab hauv muab zoo rangeability (zoo ntws rhiab heev).Lawv kuj tsis tshua muaj siab rau cov yeeb nkab vibrations.Cov khoom siv hluav taws xob feem ntau yog ntsuas qhov tawg thiab huab cua tsis zoo, thiab muaj cov khoom siv hluav taws xob xa hluav taws xob, kev sib txuas txiav, thiab xaiv qhov ntsuas qhov ntsuas ntws thiab / lossis tag nrho.

Vortex Flow Meter Styles

Ntse vortex meters muab lub teeb liab tso zis digital uas muaj cov ntaub ntawv ntau dua li qhov ntws xwb.Lub microprocessor nyob rau hauv lub flowmeter tuaj yeem kho tau rau qhov tsis txaus cov yeeb nkab ncaj qha, rau qhov sib txawv ntawm lub qhov taub thiab qhov ntawm cov matin.

Daim ntawv thov thiab kev txwv

Vortex meters feem ntau tsis pom zoo rau batching lossis lwm yam kev siv sib cuam tshuam.Qhov no yog vim qhov dribble flow rate teeb tsa ntawm qhov chaw nres tsheb batching tuaj yeem poob qis dua qhov ntsuas qhov tsawg kawg nkaus Reynolds tus lej txwv.Qhov me me ntawm tag nrho cov batch, qhov tseem ceeb tshaj qhov ua yuam kev tshwm sim yuav yog.

Tsis tshua muaj siab (tsawg ceev) gases tsis tsim muaj zog txaus siab mem tes, tshwj xeeb tshaj yog yog hais tias cov dej velocities tsawg.Yog li ntawd, nws yuav zoo li tias nyob rau hauv xws li kev pab cuam qhov rangeability ntawm lub ' meter ' yuav tsis zoo thiab tsawg ntws yuav tsis ntsuas.Ntawm qhov tod tes, yog tias txo qis qhov muaj peev xwm ua tau thiab qhov ntsuas tau raug qhov loj me rau ib txwm ntws, vortex flowmeter tseem tuaj yeem txiav txim siab.