Intshayelelo kunye nokusetyenziswa komlinganiselo we-vortex flowmeter

I-standard orifice flowmeter yayisetyenziswe ngokubanzi kumlinganiselo wokuhamba kwe-steam egcweleyo kwiminyaka ye-1980, kodwa ukusuka kuphuhliso lwezixhobo zokuhamba, nangona i-orifice flowmeter inembali ende kunye noluhlu olubanzi lwezicelo; Abantu bamfunde kakuhle kwaye idatha yovavanyo igqityiwe, kodwa kusekho iintsilelo ekusebenziseni i-orifice flowmeter eqhelekileyo ukulinganisa ukuhamba komphunga ogcweleyo: okokuqala, ilahleko yoxinzelelo inkulu; Okwesibini, umbhobho we-impulse, amaqela amathathu eevalve kunye nezixhumi zilula ukuvuza; Okwesithathu, uluhlu lokulinganisa luncinci, ngokubanzi 3: 1, ekulula ukubangela amaxabiso aphantsi okulinganisa ukuguquguquka okukhulu kokuhamba. I-vortex flowmeter inesakhiwo esilula, kwaye i-vortex transmitter ifakwe ngokuthe ngqo kumbhobho, onqoba umcimbi wokuvuza kwepayipi. Ukongezelela, i-vortex flowmeter inelahleko encinci yoxinzelelo kunye noluhlu olubanzi, kwaye umlinganiselo womlinganiselo we-steam egcweleyo unokufikelela kwi-30: 1. Ke ngoko, ngokukhula kwetekhnoloji yokulinganisa i-vortex flowmeter, ukusetyenziswa kwe-vortex flowmeter kuya kuthandwa ngakumbi.

1. Umgaqo wokulinganisa we-vortex flowmeter

I-Vortex flowmeter isebenzisa umgaqo we-fluid oscillation ukulinganisa ukuhamba. Xa ulwelo ludlula kwi-vortex flow transmitter kumbhobho, imiqolo emibini ye-vortices ehambelana nesantya sokuhamba iveliswa ngokutshintshanayo phezulu nasezantsi emva kwejenereyitha ye-vortex yekholamu engunxantathu. Ukukhutshwa okuphindaphindiweyo kwe-vortex kuhambelana nesantya somndilili wolwelo oluqukuqela kwijenereyitha ye-vortex kunye nobubanzi beempawu zejenereyitha ye-vortex, enokubonakaliswa ngolu hlobo lulandelayo:

Apho: F kukukhululwa rhoqo kwe-vortex, Hz; I-V ngumndilili wesantya solwelo oluqukuqela kwijenereyitha ye-vortex, m/s; D luphawu lobubanzi be-vortex generator, m; I-ST yinombolo ye-Strouhal, i-dimensionless, kwaye ixabiso layo liyi-0.14-0.27. I-ST ngumsebenzi wenombolo yeReynolds, st=f (1/re).

Xa inombolo yeReynolds ikwinqanaba le-102-105, ixabiso le-st limalunga ne-0.2. Ngoko ke, kumlinganiselo, inani le-Reynolds le-fluid kufuneka libe yi-102-105 kunye ne-vortex frequency f = 0.2v / d.

Ngoko ke, i-avareji yesantya V yolwelo oluqukuqela kwijenereyitha ye-vortex ingabalwa ngokulinganisa i-vortex frequency, kwaye ke ukuhamba kwe-Q kunokufumaneka kwi-formula q=va, apho i-a yindawo enqamlezayo yolwelo oluqukuqelayo. ngokusebenzisa i-vortex generator.

Xa i-vortex yenziwa kumacala omabini ejenereyitha, i-sensor ye-piezoelectric isetyenziselwa ukulinganisa utshintsho olutshintshileyo lokunyuswa kwe-perpendicular ukuya kwicala lokuhamba kolwelo, ukuguqula utshintsho lokunyuswa lube ngumqondiso wefrikhwensi yombane, ukukhulisa kunye nokubumba umqondiso wefrikhwensi, kwaye uyikhuphe. kwisixhobo sesibini sokuqokelela kunye nokuboniswa.

2. Ukusetyenziswa kwe-vortex flowmeter

2.1 ukhetho lwe-vortex flowmeter

2.1.1 ukhetho lwe-vortex flow transmitter

Kumlinganiso ogcweleyo womphunga, inkampani yethu yamkela uhlobo lwe-VA yepiezoelectric vortex flow transmitter eveliswe yiHefei Instrument General Factory. Ngenxa yoluhlu olubanzi lwe-vortex flowmeter, kwisicelo esisebenzayo, ngokuqhelekileyo kuqwalaselwa ukuba ukuhamba komphunga ogcweleyo akukho ngaphantsi komda ongaphantsi we-vortex flowmeter, oko kukuthi, izinga lokuhamba kwamanzi kufuneka lingabi ngaphantsi kwe-5m / s. Ii-Vortex flow transmitters ezine-diameters ezahlukeneyo zikhethwa ngokuhambelana nokusetyenziswa kwe-steam, kunokuba i-diameter yenkqubo ekhoyo yombhobho.

2.1.2 Ukukhethwa kwe-pressure transmitter yembuyekezo yoxinzelelo

Ngenxa yombhobho omde ogcwele umphunga kunye nokuguquguquka okukhulu koxinzelelo, imbuyekezo yoxinzelelo kufuneka yamkelwe. Ukuqwalasela ubudlelwane obuhambelanayo phakathi koxinzelelo, ukushisa kunye nokuxinana, kuphela imbuyekezo yoxinzelelo inokumkelwa kumlinganiselo. Kuba uxinzelelo lomphunga ogcweleyo wombhobho wenkampani yethu ukuluhlu lwe-0.3-0.7mpa, uluhlu lokuhambisa uxinzelelo lunokukhethwa njenge-1MPa.