Tataiso ea ba qalang ho 7 Common Flow Meters le Malebela a Khetho

Tekanyo ea phallo ha se lintlha tsa tekheniki feela; ke ts'ebetso ea ts'ebetso ea indasteri, ho netefatsa polokeho, ho nepahala, le ho boloka litšenyehelo. Ka mefuta e fetang 100 ealimithara tse phallange tletse 'marakeng kajeno, ho khetha e nang le tekanyo e ntle ka ho fetisisa ea ho sebetsa ho ea ho theko ho ka utloahala ho sithabetsa. Tataiso ena e hlahloba lintlha tsa bohlokoa mabapi le lisebelisoa tsa phallo, e u thusa ho khetha khetho ka kholiseho. Hore na o moenjiniere ea ntlafatsang lipeipi kapa mookameli oa moralo oa lichelete bakeng sa lintlafatso, a re ke re hlahlobeng lintlha tsa bohlokoa tsa mefuta ea li-flow meter, matla a tsona, le malebela a sebetsang a ho khetha.

Ho utloisisa Limithara Tsa Phallo: Hobaneng li Bohlokoa ho Indasteri ea Boiketsetso

Phallangsekhahlaisparameter ea motheo ea tlhahiso ea indasteri, e laolang ntho e 'ngoe le e' ngoe ho tloha ho lik'hemik'hale ho ea ho kabo ea matla. Lilemong tsa bo-1970, theknoloji ea khatello e fapaneng e ne e tšoere karolo ea 80% ea mmaraka, empa boqapi bo se bo hlahisitse likhetho tse bohlale le tse fapaneng. Kajeno,ho khetha phallometarae kenyeletsaho leka-lekanya lintlha tse kang mofuta oa mokelikeli, maemo a ts'ebetso, litlhoko tsa ho nepahala, le tekanyetso. Ho tloha lits'ebetsong tsa ts'ebetso libakeng tse thata, joalo ka lisebelisoa tsa oli tse lebopong la leoatle kapa liphaposi tse hloekisang tsa meriana, senotlolo ke ho tsamaisana le litšoaneleho tsa metara le ts'ebeliso ea hau e ikhethileng ho qoba nako le ho bala ho sa nepahalang.

Poso ena e tla hlahloba mekhahlelo e supileng e meholo ea limithara tsa phallo e sebelisoang hangata indastering, e totobatsa likarolo tsa eona, melemo, mathata le lits'ebetso maemong a mefuta. Latela feela ho tseba mekhoa e ntlafalitsoeng ea ho khetha meter ea phallo!

1. Differential Pressure Flow Meters: The Reliable Workhorse

Khatello e fapanengtekanyomasallatheknoloji ea phallo e sebelisoang ka ho fetisisa, e khonang ho sebetsana le maro a karolo e le 'ngoe tlas'a maemo a sa tšoaneng, ho kenyelletsa le mocheso o phahameng le likhatello. Nakong ea katleho ea eona lilemong tsa bo-1970, e ile ea hapa 80% ea 'maraka ka mabaka a utloahalang. Limithara tsena hangata li na le sesebelisoa sa throttling (joaloka orifice plate, nozzle, Pitot tube, kapa karolelano ea Pitot tube) e pentiloeng ka transmitter.

Sesebediswa sa throttling se fokotsa phallo ya mokelikeli, se etsa phapang ya kgatello ho ya hodimo le tlase ho noka e lekanang le lebelo la phallo. Lipoleiti tsa Orifice ke khetho ea ho khetha ka lebaka la bonolo le bonolo ba ho kenya. Ha feela li ntse li etsoa le ho kengoa ka litekanyetso (nahana ka ISO 5167), li fana ka litekanyo tse tšepahalang ntle le ho hloka tlhahlobo ea phallo ea 'nete empa tlhahlobo e potlakileng feela.

Seo se boletse, lisebelisoa tsohle tsa throttling li hlahisa tahlehelo e sa feleng ea khatello. Letlapa la orifice le bohale le bohale le ka lahleheloa ke 25-40% ea khatello e phahameng ea phapang, e eketsang litšenyehelo tsa matla bakeng sa ts'ebetso e kholo. Li-pitot tubes, ka lehlakoreng le leng, li na le tahlehelo e fokolang empa li na le maikutlo a ho fetoha ha boemo ba phallo, kaha moferefere o ka senya ho bala ha bona.

Setsing sa petrochemical, basebetsi ba ile ba fapanyetsana lipoleiti tse siiloeng ke nako bakeng sa li-tubes tsa Venturi ho fokotsa khatello, e leng se ileng sa fella ka phokotso ea 15% ea tšebeliso ea matla a pompo. Ka hona, ha u sebetsana le maro a viscous kapa li-slurries, hoa utloahala ho nahana ka karolelano ea li-tubes tsa Pitot bakeng sa ho nepahala ho betere phallong e sa lekanang. Seo re lokelang ho se bolela ke hore kamehla etsa bonnete ba hore bonyane liphaephe tse 10-20 tsa liphaephe tse otlolohileng ho ea holimo ho ea holimo ho tsitsisa boemo ba phallo, kapa basebelisi ba ka 'na ba tšoaroa ke hlooho e bohloko.

2. Limithara tsa Phallo ea Sebaka se Fetohang: Bonolo bo Kopana le ho Fetoha

Thesetšoantšo sa rotameter se emelamefuta ea phallo ea sebaka se feto-fetohang, moo float e nyolohang ka har'a tube e tapered ho lekana le sekhahla sa phallo. Mohloli oa bona o ikhethang? Ho bala ka ho toba, sebakeng sa marang-rang ntle le matla a ka ntle, a loketseng ho hlahloba kapele tšimong.

Tsena li tla ka litlolo tse peli tse kholo: li-rotameter tsa li-tube tsa khalase bakeng sa mecha ea litaba e potolohileng, e sa senyeheng joaloka moea, likhase, kapa argon, e fanang ka ponahalo e hlakileng le ho baleha habonolo;letšepetuberotameterliphetoleloe nang le matšoao a makenete bakeng sa maemo a phahameng a mocheso kapa khatello e phahameng. Ea ho qetela e ka hlahisa matšoao a tloaelehileng bakeng sa ho kopanyakalirekotoortotalizers.

Mefuta e fapaneng ea sejoale-joale e kenyelletsa meralo ea li-conical e kentsoeng nakong ea selemo e se nang likamore tsa condensate, e ithorisang ka tekanyo ea 100: 1 turndown le tlhahiso ea mola, e loketseng tekanyo ea mouoane.

Ha ho buuoa ka lits'ebetso tse pharaletseng, ho khethoa li-rotameter tse ngata hore li kenngoe lits'ebetsong tsa laborateng bakeng sa ho kopanya khase, e leng ho bolokang litšenyehelo tsa wiring ka lebaka la litlhoko tse se nang matla. Empa ho shebella ho thothomela, li-rotameter li ka baka jitter ea float le ho bala ka bohata. Ka mohlala, ntlafatsong ea brewery, mefuta ea tšepe ea tšepe e sebetsana le phallo e chesang, e lelefatsa bophelo ba tšebeletso ka makhetlo a mararo, ha liphetolelo tsa khalase tse nang le li-armored tse nang le PTFE linings ke khetho e amohelehang ea lichelete, empa basebetsi ba lokela ho li lekanya selemo le selemo ho boloka ho nepahala ha 1-2%.

3. Limithara tsa Phallo ea Vortex: Oscillation bakeng sa Precision

Limithara tsa Vortex, mohlala o ka sehloohong oa mefuta ea li-oscillatory, beha 'mele oa bluff tseleng ea ho phalla, ho hlahisa maqhubu a chenchana ao hangata a amanang le lebelo. Ha ho na likarolo tse tsamaeang tse bolelang ho pheta-pheta hantle, ho phela nako e telele, le tlhokomelo e fokolang.

E ts'oara melemo joalo ka mefuta e mengata ea mela, ho itšireletsa mochesong, khatellong, khatello ea maikutlo, kapa ho feto-fetoha ha viscosity, tahlehelo e tlase ea khatello, le ho nepahala ho phahameng (0.5-1%), methapo ea phallo ea vortex e sebetsana le ho fihla ho 300 ° C le 30 MPa, e etsa hore li feto-fetohe bakeng sa likhase, lino le mouoane.

Mokhoa oa ho utloa ho limithara tsa phallo ea vortex o fapana ho ea bohareng: li-sensor tsa piezoelectric li loketse mouoane, li-sensor tsa mocheso kapa tsa ultrasonic li lumellana le moea, 'me hoo e batlang e le likhetho tsohle tsa kutlo li sebetsa bakeng sa metsi. Ho tšoana le lipoleiti tsa orifice, phallo coefficient e khethoa ke litekanyo tsa mithara.

Morerong oa lipeipi tsa khase ea tlhaho, li-vortex metres li sebetsa hantle ho feta li-turbine tsa ho phalla, ho fokotsa liphoso ho tloha ho 5% ho ea tlase ho 1%. Li na le maikutlo a ho kenya, e leng se tiisang hore ho matha ho otlolohile le ho qoba ho ba haufi le li-valve. Ha ho tluoa mekhoeng e hlahang, li-wireless vortex metres tse nang le bophelo ba betri ho fihlela lilemo tse 10 bakeng sa libaka tse hole.

4. Limithara tsa Phallo ea Motlakase: Motsoalle ea Molemo ka ho Fetisisa oa Mekelikeli e Kholisang

Limithara tsa motlakase, kapa mag metres, li sebelisa hampe molao oa Faraday, o tsamaeang ka tsela ena: maro a tsamaisang metsi a phunyeletsang matla a khoheli a etsa hore motlakase o lekane le phallo. E thibetsoe ho mecha ea litaba ea conductive, limithara tsena ha li amehe ke mocheso, khatello, density, kapa viscosity-theoretically, bonyane-ka 100: 1 turndown le 0.5% ho nepahala. Bophahamo ba lipeipi bo tloha ho 2mm ho isa ho 3m, metsi a loketseng, li-slurries, li-pulps, kapa li-corrosives.

Limithara tsa phallo ea motlakase li hlahisa mats'oao a fokolang (2.5-8 mV ka sekala se felletseng), kahoo ho etsa tšireletso e nepahetseng le ho thea fatše ho bohlokoa ho qoba ho kena-kenana le li-motors.

Limithara tsa phallo ea motlakase li sebetsa hantle litsing tsa ho hloekisa metsi a litšila, li lekanya maro a litšila joalo ka li-slurries ntle le ho koala. Ho fapana le methara ea mochini, mag metres ha a na likarolo tse tsamaeang. Bakeng sa maro a senyang, joalo ka metsi a litšila a nang le asiti, ho ntlafatsoa ho li-mag metres tsa PFA ho ka fokotsa litlhoko tsa tlhokomelo ka ho fihla ho 50% joalo ka ha ho bonoa tlalehong ea morao-rao ea semela. Ho feta moo, li-mag metres tse tsamaisoang ke betri li ntse li fumana matla bakeng sa metering ea metsi e hole, e fana ka maemo a bonolo libakeng tse kantle ho grid ha e ntse e boloka ts'epo e ts'oanang e se nang clog.

5. Limithara tsa Phallo ea Ultrasonic: Innovation e se nang Intrusive

Ho phalla ha Ultrasoniclimitharatlohoka mefuta e 'meli ea mantlha: Doppler le nako ea ho fofa (TOF).Dopplerlimitharalekanyaho phalla ka ho lemoha ho fetoha ha makhetlo ho tloha ho likaroloana tse emisitsoeng, ho li etsa tse loketseng bakeng sa maro a phahameng, a litšila joaloka li-slurries, empa a sa sebetse hantle bakeng sa lebelo le tlaase kapa bokaholimo ba lipeipi.

Limithara tsa TOF, tse lekanyang phallo ho ipapisitse le phapang ea nako ea maqhubu a ultrasonic a tsamaeang le ho phalla, a ipabola ka lino tse hloekileng, tse ts'oanang joalo ka metsi, tse hlokang lisebelisoa tsa elektroniki tse nepahetseng bakeng sa ho nepahala. Meralo ea TOF e nang le maballo a mangata e ntlafatsa ts'ebetso ho phallo ea moferefere, e fanang ka ts'epo e kholo lits'ebetsong tse rarahaneng.

Mocheng oa metsi a pholileng a retrofit, li-clamp-on TOF ultrasonic metres li pholositse likete ka ho felisa tlhokahalo ea ho khaola kapa ho koala liphaephe, ho finyella ho nepahala ha 1% ka ho lekanya hantle. Leha ho le joalo, li-bubble tsa moea kapa liphaephe tsa liphaephe li ka sitisa ho bala, ka hona, tlhahlobo e felletseng ea sebaka sa marang-rang e bohlokoa haholo. Bakeng sa litlhahlobo tsa masimong, li-portable ultrasonic units li bohlokoa haholo, li fana ka tlhahlobo e potlakileng ntle le nako ea ho theoha ha sistimi.

6. Limithara tsa Phallo ea Turbine: Lebelo le ho nepahala ha Motion

Phallo ea turbinelimithara sebetsaka molao-motheo oa ho boloka matla, moo metsi a phallang a potolohang rotor, 'me lebelo la rotor le amana ka ho toba le lebelo la ho phalla. Limithara tsena li sebetsa haholo lits'ebetsong tse hlokang ho nepahala ho phahameng, ka meralo e ikhethileng ea khase e nang le li-angles tse nyane tsa blade le li-blade tse ngata ho ntlafatsa ts'ebetso ea maro a fokolang haholo. Li fana ka ho nepahala ho ikhethang (0.2-0.5%, kapa 0.1% maemong a khethehileng), 10: 1 turndown ratio, tahlehelo e tlaase ea khatello, le ts'ebetso e matla tlas'a khatello e matla, empa e hloka maro a hloekileng le liphaephe tse lekaneng tse lekaneng ho qoba liphoso tse bakoang ke moferefere.

Ka tsamaiso ea mafura a lifofane,ho phalla ha turbinelimitharatiisitsoesupa ho nepahala ha phetisetso ea litlamong, ea bohlokoa bakeng sa ho nepahala ha litefiso. Mekhabiso e menyenyane e holisa kutlo ho bongata ba mokelikeli le viscosity, ka hona, tlhoekiso e matla ea pele e tlameha ho thibela liphoso tse amanang le litšila. Meetso ea Hybrid e nang le li-pickups tsa makenete e ntlafalitse ts'epehi ka ho fokotsa moaparo oa mochini.

7. Positive Displacement Flow Meters: Volumetric Precision

Limithara tse ntle tsa phallo ea phallo li lekanya phallo ka ho ts'oara le ho tlosa mokelikeli o tsitsitseng ka ho potoloha ka 'ngoe, ho sebelisoa meralo e kang oval gear, rotary piston, kapa scraper mefuta. Oval gear metre e fana ka 20:1 turndown ratio le ho nepahala ho phahameng (hangata 0.5% kapa ho feta) empa ho ka ba bonolo ho jamming ho tsoa ho maloanlahla a mokelikeli. Limithara tsa "rotary piston" li sebetsa hantle haholo ho sebetsana le palo e kholo, leha moralo oa tsona o ka lumella ho lutla hanyane, ho ama ho nepahala ha maemo a phallo e tlase.

Kaha ha e amehe ke viscosity ea mokelikeli, limithara tsa PD li loketse lino tse kang oli le metsi, empa ha li tšoanelehe bakeng sa likhase kapa mouoane ka lebaka la mochine oa tsona oa volumetric.

Setsing sa ho lokisa lijo, limithara tsa PD, haholo-holo mefuta ea li-oval gear, li ne li le bohlokoa bakeng sa dosing e nepahetseng ea li-syrups tsa viscous, ho netefatsa boleng ba sehlahisoa bo sa fetoheng. Leha ho le joalo, maloanlahla a sirapong a sa sefshoang a ne a baka mathata ka linako tse ling, e leng se neng se totobatsa tlhokahalo ea mekhoa e matla ea ho hloekisa. Meralo ea Clean-in-place (CIP) e fokolitse nako ea ho theoha haholo ka ho nolofatsa tlhokomelo, e fetolang lithapo tse sebetsang hantle.

Ho Khetha Metharo e nepahetseng ea Phallo: Malebela a Setsebi a Katleho

Ho bohlokoa ho khetha meter e nepahetseng bakeng sa ho ntlafatsa lits'ebetso tsa indasteri, kaha ha ho mitha e le 'ngoe e lumellanang le ts'ebeliso e' ngoe le e 'ngoe. Ho etsa khetho e nepahetseng, hlahloba lintlha tsa bohlokoa: thepa ea mokelikeli (mohlala, viscosity, corrosiveness, kapa particulate content), phallo ea phallo (bonyane le litekanyetso tse phahameng), ho nepahala ho hlokahalang (ho tloha ho 0.1% bakeng sa phetisetso ea litlamong ho isa ho 2% bakeng sa tlhahlobo e akaretsang), lithibelo tsa ho kenya (joalo ka boholo ba liphaephe, litlhoko tse tsamaisoang ka kotloloho, le mefokolo ea ho hlophisoa ha thepa, litšenyehelo tsa ho kenya thepa le thepa ea motlakase), ditshenyehelo).

Ka ho lekanya lintlha tsena ka mokhoa o hlophisehileng ho ipapisitse le litlhoko tsa ts'ebetso ea hau, hantle ka tlhahlobo ea sefofane kapa lipuisano tsa barekisi, u ka khetha mitha e lekanyang ts'ebetso le tekanyetso.