Zvinodiwa paipi yakatwasuka ye "10D uponstream uye 5D uponstream" haisi mutemo wakakwana we clamp-on ultrasonic flowmeters, asi nhungamiro yakajairika yekuona kuti kuyera kwakarurama. Kureba kwepombi yakatwasuka kunodiwa kunoenderana nezvinhu zvakaita serudzi rwekukanganiswa kwekuyerera kwemvura, musimboti wekuyera (musiyano wenguva vs. Doppler), uye zvinodiwa pakunyatsojeka kwekushandisa.
1. Sei "10D Upstream & 5D Downstream" Zvichikurudzirwa?
Ma ultrasonic flowmeters anoverenga flow rate zvichienderana nenguva yekupararira (time-difference method) kana frequency shift (Doppler method) yema ultrasonic waves ari mumvura. Izvi zvinoenderana nekuyerera kwakasimba uye kwakanyatsogadzirwa (zvakanaka, symmetric velocity profile muchikamu chepombi).
Zvinhu zvakaita semagokora, matinji, mavharuvhu, kana zvinoderedza simba zvinokanganisa kuyerera kwemvura (zvichigadzira kutenderera, maedhi, kana kugoverwa kwekukurumidza kusina kuenzana), izvo zvinogona kukonzera zvikanganiso zvekuyera. Gwaro rekuti "10D upstream + 5D downstream" rinopa nzvimbo yakakwana yekuti kuyerera kwakakanganiswa kugadzikane zvakare usati wapinda muchikamu chekuyera chemita.
2. Kugadzirisa Kunochinjika: Ndeipi nguva apo "10D/5D" Inogona Kusunungurwa Kana Kuti Inofanira Kuteverwa Zvakasimba?
Kureba kwepombi yakatwasuka kunodiwa kunosiyana zvichienderana nemamiriro ezvinhu chaiwo, sezvakaratidzwa mutafura iri pazasi:
| Mamiriro ezvinhu | Kureba kwepombi yakatwasuka kunodiwa | Chikonzero |
|---|---|---|
| Kusagadzikana kwemvura zvishoma (semuenzaniso, magokora marefu ane 90°, mavharuvhu egedhi akavhurika zvizere) | Kumusoro: 5D–8D Pasi perwizi: 3D–5D | Kukanganisika kudiki kunopera nekukurumidza; mapaipi mapfupi akatwasuka anokwana kudzikamisa kuyerera kwemvura. |
| Kukanganiswa kwakanyanya kwekuyerera kweropa (semuenzaniso, magokora mapfupi ane 90°, mavharuvhu epasi, matinji) | Kumusoro: ≥10D Pasi perwizi: ≥5D | Kutenderera kwakanyanya/kutenderera kunoda daro refu kuti mvura ikure zvakare kusvika pakuyerera kwakasimba. |
| Mashandisirwo asina kunyatsojeka (semuenzaniso, kutarisa maitiro ese, kutevedza kuyerera kwemafambiro emvura kusingakoshi) | Kumusoro: 3D–5D Pasi perwizi: 2D–3D | Kushivirira zvikanganiso zvidiki (±3%–±5%) kunobvumira kuchinjika kwakanyanya. |
| Zvishandiso zvine hungwaru hwakanyanya (semuenzaniso, kugadziriswa kwekutengeserana, kuyera simba, kuyerwa kwemishonga) | Kumusoro: 10D–15D Pasi perwizi: 5D–8D | Zvinodiwa zvakanyatsonaka (±1%–±2%) zvinoda mamiriro ekuyerera akakodzera. |
| Mamita ekubatanidza clamp-on emhando yeDoppler | Inochinjika zvishoma (semuenzaniso, kumusoro kwe5D–8D) | MaDoppler meter haanyanyi kukanganiswa nekusawirirana kwema flow profile pane time-difference meter. |
3. Mhinduro Kana Kureba Kwepombi Yakatwasuka Kusina Kukwana
Kana nzvimbo yepombi iri shoma uye "10D/5D" isingakwaniswe, matanho anotevera anogona kuderedza kukanganiswa kwekuyerera kwemvura uye kuvandudza kururama:
- Isa zvinotonhodza mvura: Zvishandiso zvakaita semachubhu, mahoneycombs, kana ma orifice plates zvinogona kutwasanudza mvura yakakanganisika munzvimbo pfupi (zvichideredza pombi dzinodiwa dzekumusoro dzakatwasuka kusvika pa3D–5D).
- Gadzirisa nzvimbo yekuisa masensa: Dzivisa kuisa masensa zvakananga pasi pezvinokanganiswa; kana zvichibvira, isa kumusoro kwegokora/mavharuvhu (zvinokanganiswa kumusoro kwerwizi hazvina simba rakawanda pane zviri pasi perwizi).
- Gadzirisa nzvimbo/kona ye sensor: Mamwe ma clamp-on metres epamusoro anobvumira kugadzirisa daro re transducer kana kona ye beam kuti zvikwanisike kana paine kusarongeka kudiki kwe flow profile.
- Shandisa masensa ane nzira dzakawanda: mamita ane nzira mbiri kana mana anokwana anokwana kuyera kumhanya panzvimbo dzakawanda muchikamu chepombi, uchienzanisa avhareji yekusawirirana kwehuwandu hwemvura inoyerera kunokonzerwa nekusakwana kwepombi yakatwasuka.
Mhedziso
Kunyange hazvo "10D kumusoro kwemvura uye 5D pasi pemvura" iri nzira yakachengeteka yezviitiko zvakawanda zvemaindasitiri, ma clamp-on ultrasonic flowmeters haadi hurefu hwakadai muzviitiko zvese. Chinokosha ndechekuenzanisa hurefu hwepombi yakatwasuka nedanho rekukanganiswa kwekuyerera kwemvura uye zvinodiwa pakunyatsorongeka kwekushandisa. Kana nzvimbo yakawandisa, ma flow conditioner kana ma multi-path sensors anogona kutsiva zvakakwana pombi yakatwasuka isina kukwana, zvichiita kuti kuyerwa kushande zvakanaka.
Nguva yekutumira: Gunyana-04-2025