Kenyelletso le tšebeliso ea tekanyo ea vortex flowmeter

The standard orifice flowmeter e ne e sebelisoa haholo ho lekanya phallo ea mouoane o tletseng mouoane lilemong tsa bo-1980, empa ho tloha ho nts'etsopele ea lisebelisoa tsa phallo, le hoja orifice flowmeter e na le histori e telele le mefuta e mengata ea likopo; Batho ba mo ithutile hantle 'me boitsebiso ba liteko bo phethiloe, empa ho ntse ho e-na le mefokolo e itseng ea ho sebelisa orifice flowmeter e tloaelehileng ho lekanya phallo ea mouoane e tletseng: pele, tahlehelo ea khatello e kholo; Ea bobeli, phala ea tšusumetso, lihlopha tse tharo tsa li-valve le li-connectors li bonolo ho lutla; Ntlha ea boraro, tekanyo ea ho lekanya e nyenyane, ka kakaretso 3: 1, e leng bonolo ho baka litekanyetso tse tlaase tsa tekanyo bakeng sa ho fetoha ho hoholo ha phallo. Vortex flowmeter e na le sebopeho se bonolo, 'me transmitter ea vortex e kenngoa ka ho toba pompong, e hlōlang ketsahalo ea ho lutla ha pipeline. Ho phaella moo, phallo ea vortex e na le tahlehelo e nyenyane ea khatello le mefuta e mengata e fapaneng, 'me tekanyo ea tekanyo ea tekanyo ea mouoane o tletseng metsi e ka fihla ho 30: 1. Ka hona, ka khōlo ea theknoloji ea tekanyo ea vortex flowmeter, tšebeliso ea vortex flowmeter e ntse e tsebahala haholoanyane.

1. Molao-motheo oa ho lekanya oa vortex flowmeter

Vortex flowmeter e sebelisa molao-motheo oa oscillation oa mokelikeli ho lekanya phallo. Ha mokelikeli o feta ka har'a mochini o fetisang phallo ea vortex phaepheng, mela e 'meli ea maqhubu a lekanang le sekhahla sa phallo e hlahisoa ho ea holimo le tlase ka morao ho jenereithara ea vortex ea kholomo e kgutlotharo. Maqhubu a ho lokolloa ha vortex a amana le lebelo le tloaelehileng la mokelikeli o phallang ka jenereithara ea vortex le bophara ba sebopeho sa jenereithara ea vortex, e ka hlalosoang ka tsela e latelang:

Moo: F ke maqhubu a ho lokolloa ha vortex, Hz; V ke lebelo le tloaelehileng la mokelikeli o phallang ka jenereithara ea vortex, m / s; D ke bophara ba sebopeho sa jenereithara ea vortex, m; ST ke nomoro ea Strouhal, ha e na moeli, 'me boleng ba eona ke 0.14-0.27. ST ke mosebetsi oa nomoro ea Reynolds, st=f (1/re).

Ha nomoro ea Reynolds Re e bohareng ba 102-105, boleng ba st bo ka ba 0.2. Ka hona, tekanyong, palo ea Reynolds ea mokelikeli e lokela ho ba 102-105 le maqhubu a vortex f=0.2v/d.

Ka hona, karolelano ea lebelo la V ea mokelikeli o phallang ka jenereithara ea vortex e ka baloa ka ho lekanya maqhubu a vortex, 'me joale phallo Q e ka fumanoa ho tsoa ho formula q=va, moo e leng sebaka sa sefapano sa mokelikeli o phallang. ka jenereithara ea vortex.

Ha vortex e hlahisoa ka mahlakoreng a mabeli a jenereithara, sensor ea piezoelectric e sebelisetsoa ho lekanya phetoho ea phahamiso e fapaneng e lebileng ho tataiso ea phallo ea mokelikeli, ho fetolela phetoho ea phallo hore e be lets'oao la maqhubu a motlakase, ho holisa le ho theha lets'oao la maqhubu, ebe o le ntša. ho sesebelisoa sa bobeli bakeng sa ho bokella le ho bonts'a.

2. Ho sebelisoa ha vortex flowmeter

2.1 khetho ea vortex flowmeter

2.1.1 khetho ea mochine oa ho phalla oa vortex

Tekanyong ea mouoane o tletseng mouoane, k'hamphani ea rona e amohela VA mofuta oa piezoelectric vortex flow transmitter e hlahisoang ke Hefei Instrument General Factory. Ka lebaka la mefuta e mengata e fapaneng ea phallo ea vortex, ts'ebelisong e sebetsang, ka kakaretso ho nahanoa hore phallo ea mouoane o tletse ha e tlase ho feta moeli o tlase oa vortex flowmeter, ke hore, sekhahla sa phallo ea mokelikeli ha sea lokela ho ba tlase ho 5m / s. Li-transmitters tsa phallo ea Vortex tse nang le li-diameter tse fapaneng li khethoa ho latela tšebeliso ea mouoane, ho e-na le li-diameter tsa lipeipi tse teng.

2.1.2 khetho ea mochine oa khatello bakeng sa matšeliso a khatello

Ka lebaka la phaephe e telele e tletseng mouoane le phetoho e kholo ea khatello, matšeliso a khatello a tlameha ho amoheloa. Ha ho nahanoa ka kamano e lumellanang pakeng tsa khatello, mocheso le boima ba 'mele, matšeliso a khatello feela a ka amoheloa ka tekanyo. Kaha khatello e matla ea mouoane ea phaephe ea k'hamphani ea rona e maemong a 0.3-0.7mpa, mefuta e fapaneng ea mochini o fetisang khatello e ka khethoa e le 1MPa.