Nhanganyaya uye kuyerwa kushandiswa kwevortex flowmeter
Iyo yakajairwa orifice flowmeter yakashandiswa zvakanyanya mukuyerwa kwekuzara kwemhepo inoyerera muma1980s, asi kubva pakuvandudzwa kwemidziyo yekuyerera, kunyangwe iyo orifice flowmeter ine nhoroondo refu uye yakawanda yekushandiswa; Vanhu vakamudzidza zvakanaka uye ruzivo rwekuedza rwakakwana, asi kuchine zvimwe zvinokanganisa pakushandisa chiyero che orifice flowmeter kuyera saturated steam flow: kutanga, kurasikirwa kwekumanikidzwa kwakakura; Chechipiri, pombi inopesvedzera, mapoka matatu emavharuvhu uye zvibatanidza zviri nyore kudonhedza; Chechitatu, chiyero chekuyera idiki, kazhinji 3: 1, iyo iri nyore kukonzera yakaderera kuyerwa kukosha kwekuyerera kukuru kuyerera. Iyo vortex flowmeter ine chimiro chakareruka, uye iyo vortex transmitter yakaiswa zvakananga papombi, iyo inokunda chiitiko chekubuda kwepombi. Pamusoro pezvo, iyo vortex flowmeter ine diki yekurasikirwa kwekumanikidza uye yakafara siyana, uye kuyerwa kweyero reshiyo yemhepo yakazadza inogona kusvika 30: 1. Naizvozvo, nekukura kwevortex flowmeter kuyerwa tekinoroji, kushandiswa kwevortex flowmeter kunowedzera kufarirwa.
1. Kuyera nheyo yevortex flowmeter
Vortex flowmeter inoshandisa iyo fluid oscillation musimboti kuyera kuyerera. Kana mvura ichipfuura nepamhepo inoyerera yevortex mupombi, mitsetse miviri yemavortices inoenzana nechiyero chekuyerera inogadzirwa zvichikwidza nekudzika kuseri kwejenareta revortex yekoramu yetriangular. Iyo frequency yekuburitsa yevortex ine hukama neavhareji velocity yemvura inoyerera kuburikidza nevortex jenareta uye hunhu hwehupamhi hweiyo vortex jenareta, inogona kuratidzwa sezvinotevera:
Ikoko: F ndiyo inoburitsa frequency yevortex, Hz; V is avhareji velocity yemvura inoyerera kuburikidza nevortex generator, m/s; D ndiyo hunhu hupamhi hwevortex jenareta, m; ST ndiyo nhamba yeStrouhal, isina dimension, uye kukosha kwayo kuri 0.14-0.27. ST ibasa renhamba yeReynolds, st=f (1/re).
Kana iyo Reynolds nhamba Re iri muhuwandu hwe102-105, kukosha kwest kunosvika 0.2. Nokudaro, muchiyero, nhamba yeReynolds yemvura inofanira kuva 102-105 uye vortex frequency f=0.2v/d.
Naizvozvo, avhareji velocity V yemvura inoyerera kuburikidza nevortex jenareta inogona kuverengerwa nekuyera iyo vortex frequency, uye ipapo kuyerera kweQ kunogona kuwanikwa kubva kuformula q=va, uko a inzvimbo yepakati-chikamu chemvura inoyerera. kuburikidza nejenereta yevortex.
Kana iyo vortex yagadzirwa pamativi ese ejenareta, piezoelectric sensor inoshandiswa kuyera inotsinhanisa kusimudza shanduko perpendicular kune iyo fluid inoyerera mafambiro, shandura shanduko yekusimudza kuita yemagetsi frequency chiratidzo, kukudza uye kuumba frequency chiratidzo, uye kuiburitsa. kune yechipiri chiridzwa chekuunganidza uye kuratidza.
2. Kushandiswa kwevortex flowmeter
2.1 kusarudzwa kwevortex flowmeter
2.1.1 kusarudzwa kwevortex flow transmitter
Mukuyereswa kweutsi, kambani yedu inotora VA mhando piezoelectric vortex flow transmitter inogadzirwa neHefei Instrument General Factory. Nekuda kwehupamhi hwemhando yevortex flowmeter, mukushandisa inoshanda, zvinowanzo fungwa kuti kuyerera kwemvura yakazara haina kudzika pane yakaderera muganho wevortex flowmeter, kureva kuti, mwero wekuyerera kwemvura haufanirwe kunge wakaderera kupfuura 5m / s. Vortex flow transmitters ane madhayamita akasiyana anosarudzwa zvinoenderana nemhepo inoshandiswa, pane iripo process pombi madhayamita.
2.1.2 kusarudzwa kwekudzvanya transmitter yekumanikidza muripo
Nekuda kweiyo refu yakazara saturated pombi yehutsi uye hombe kudzokororwa kwemhepo, muripo wekumanikidza unofanirwa kutambirwa. Tichifunga nezvehukama hunoenderana pakati pekumanikidza, tembiricha uye density, chete kumanikidza muripo kunogona kugamuchirwa muchiyero. Sezvo iyo yakazara saturated steam yekumanikidza yepombi yekambani yedu iri muhupamhi hwe 0.3-0.7mpa, huwandu hweiyo pressure transmitter inogona kusarudzwa se1MPa.