Abstract
Flow meters yog cov cuab yeej tseem ceeb hauv kev tswj kev lag luam, ntsuas hluav taws xob, thiab kev saib xyuas ib puag ncig. Daim ntawv no sib piv cov qauv kev ua haujlwm, cov yam ntxwv ntawm kev ua haujlwm, thiab kev siv cov khoom siv hluav taws xob electromagnetic flowmeter, ultrasonic flow meters, thiab gas flow meters. Electromagnetic flow meter yog tsim rau cov kua dej conductive, ultrasonic flow meters muab cov kev ntsuas tsis sib cuag high-precision, thiab cov roj ntws ntsuas muaj ntau cov kev daws teeb meem rau cov khoom siv roj sib txawv (xws li cov pa roj carbon monoxide, cov pa roj carbon monoxide). Kev tshawb fawb qhia tau hais tias kev xaiv cov ntsuas ntsuas tsim nyog tuaj yeem txhim kho qhov ntsuas qhov tseeb (yuam kev < ± 0.5%), txo kev siv hluav taws xob (15% - 30% kev txuag), thiab txhim kho cov txheej txheem tswj kev ua haujlwm zoo.
1. Electromagnetic Flow Meters
1.1 Txoj Cai Ua Haujlwm
Raws li Faraday Txoj Cai Lij Choj ntawm Electromagnetic Induction, cov kua ua kua uas ntws los ntawm qhov chaw sib nqus ua kom muaj qhov sib npaug ntawm qhov sib npaug ntawm qhov ntws tawm, uas tau kuaj pom los ntawm electrodes.
1.2 Technical nta
- Tsim nyog Media: Conductive kua (conductivity ≥5 μS / cm), xws li dej, acids, alkalis, thiab slurries.
- Qhov zoo:
- Tsis muaj qhov txav txav, hnav-tiv taus, ua haujlwm ntev
- Kev ntsuas dav dav (0.1–15 m / s), tsis pom kev poob siab
- Qhov tseeb siab (± 0.2% - ± 0.5%), kev ntsuas bidirectional ntws
- Kev txwv:
- Tsis haum rau cov kua uas tsis yog-conductive (piv txwv li, roj, dej ntshiab)
- Yooj yim rau kev cuam tshuam los ntawm cov npuas los yog cov khoom siv
1.3 Cov ntawv thov ib txwm
- Cov dej hauv nroog / Cov dej khib nyiab: Loj-inch (DN300+) khiav xyuas
- Kev lag luam tshuaj: Corrosive kua ntsuas (xws li sulfuric acid, sodium hydroxide)
- Khoom noj khoom haus / Pharmaceutical: Sanitary designs (xws li, CIP tu)
2. Ultrasonic Flow Meters
2.1 Txoj Cai Ua Haujlwm
Kev ntsuas ntws nrawm siv qhov sib txawv ntawm lub sijhawm sib txawv (lub sijhawm-ntawm-flight) lossis Doppler nyhuv. Ob hom loj:
- Clamp-on (Non-invasive): Ib qho yooj yim installation
- Insertion: Haum rau cov kav dej loj
2.2 Technical nta
- Tsim nyog Media: Kua thiab roj (cov qauv tshwj xeeb muaj), txhawb nqa ib leeg / ntau theem ntws
- Qhov zoo:
- Tsis muaj kev poob siab, zoo tagnrho rau cov kua dej uas muaj viscosity (xws li, roj av)
- Kev ntsuas dav (0.01-25 m / s), qhov tseeb txog ± 0.5%
- Nws tuaj yeem ntsia tau rau hauv online, tsis tshua muaj txij nkawm
- Kev txwv:
- Kev cuam tshuam los ntawm cov khoom siv yeeb nkab (piv txwv li, cam khwb cia hlau tuaj yeem txo qis cov cim) thiab cov kua dej sib xws
- High-precision ntsuas yuav tsum tau ruaj khov (tsis txhob turbulence)
2.3 Cov ntawv thov ib txwm
- Roj & Roj: Kev saib xyuas cov kav dej ntev
- HVAC Systems: Kev ntsuas hluav taws xob rau cov dej txias / cua sov
- Environmental Monitoring: Dej / dej ntws ntsuas (portable qauv)
3. Gas Flow Meters
3.1 Hom thiab Nta
| Hom | Txoj Cai | Haum Gases | Qhov zoo | Kev txwv |
|---|---|---|---|---|
| Thermal Mass | Thaum tshav kub kub dissipation | Cov pa huv huv (cua, N₂) | Direct huab cua ntws, tsis muaj temp / siab them nyiaj | Tsis tsim nyog rau cov av noo / plua plav |
| Vortex | Kármán vortex txoj kev | Chav, natural gas | Siab kub / siab tsis kam | Tsawg rhiab heev ntawm qis ntws |
| Turbine | Rotor kev sib hloov | Natural gas, LPG | Siab raug (± 0.5% - ± 1%) | Yuav tsum muaj kev saib xyuas cov kabmob |
| Differential siab (Orifice) | Bernoulli txoj cai | Kev lag luam roj | Tus nqi qis, tus qauv tsim | Kev poob siab mus tas li (~ 30%) |
3.2 Cov ntawv thov ib txwm
- Energy Sector: Natural gas custody transfer
- Semiconductor Manufacturing: High-purity gas tswj (Ar, H₂)
- Emission Monitoring: Flue gas (SO₂, NOₓ) flow measurement
4. Kev sib piv thiab kev qhia txog kev xaiv
| Parameter | Electromagnetic | Ultrasonic | Gas (Thermal Piv txwv) |
|---|---|---|---|
| Tsim nyog Media | Conductive kua | Kua / gases | Roj |
| Qhov tseeb | ± 0.2% - 0.5% | ± 0.5% -1% | ± 1% -2% |
| Kev poob siab | Tsis muaj | Tsis muaj | Tsawg kawg |
| Kev teeb tsa | Tag nrho cov yeeb nkab, grounding | Yuav tsum tau khiav ncaj | Tsis txhob vibration |
| Nqi | Nruab nrab-siab | Nruab nrab-siab | Tsawg- nruab nrab |
Txoj Cai Xaiv:
- Kev ntsuas kua: Electromagnetic rau cov kua dej conductive; ultrasonic rau non-conductive / corrosive media.
- Gas Ntsuas: Thermal rau cov pa huv si; vortex rau chav; turbine rau kev thauj mus los.
- Cov Kev Xav Tau Tshwj Xeeb: Cov ntawv thov huv si yuav tsum tau tsim qhov chaw tsis muaj qhov tuag; high-temperature media xav tau cov ntaub ntawv kub-resistant.
5. Cov lus xaus thiab yav tom ntej Trends
- Electromagnetic flow meter dominate chemical / dej industries, nrog rau yav tom ntej kev nce qib hauv kev ntsuas dej qis (piv txwv li, dej ntshiab).
- Ultrasonic flow meter tau loj hlob hauv cov dej ntse / kev tswj xyuas hluav taws xob vim tsis muaj kev sib cuag zoo.
- Gas flow meters yog hloov zuj zus mus rau ntau qhov kev sib koom ua ke (xws li, temp / siab them nyiaj + kev txheeb xyuas muaj pes tsawg leeg) kom raug siab dua.
- Ua tiav cov servers thiab software wireless module, txhawb RS485 GPRS / 4g / WIFI / LORA / LORAWANYog xav paub ntxiv txog kev ntsuas dej ntws,
thov hu rau Honde Technology Co., LTD.
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Post lub sij hawm: Aug-13-2025