Ehe, kureba kwepombi pfupi yakatwasuka kunogona kukanganisa zvakanyanya kururama kwe clamp-on ultrasonic flowmeters—kunze kwekunge zvaderedzwa nezvimwe zviyero. Chikonzero chikuru chiri pakuti ultrasonic metres dzinoshandisa sei static flow conditions kuti dziverenge flow speed nemazvo. Pazasi pane kupatsanurwa kwakadzama kwe impact, ma processes aripo, uye zvinhu zvinopesvedzera:
1. Nei Kureba Kwepombi Pfupi Yakatwasuka Kuchikanganisa Kururama
Ma ultrasonic flowmeters anoshandisa nzira yekusiyanisa nguva (kuyera kumhanya kwemafungu e ultrasonic kumusoro vs. pasi) kana nzira yeDoppler (kuona kuchinja kwema frequency kubva kuma particles/bubbles ari mumvura). Matekinoroji ese ari maviri anoenderana ne symmetric turbulent flow profile yakagadzirwa zvakakwana, inotenderera muchikamu chepombi.
Kana kureba kwepombi yakatwasuka kusina kukwana (semuenzaniso, pasi pe 5D–10D inokurudzirwa pamusoro pematambudziko), ma profiles ekuyerera kwemvura anokanganiswa ne:
- Kutenderera/kutenderera: Kunokonzerwa nemagokora, matinji, mavharuvhu, kana zvinoderedza simba, izvo zvinogadzira kufamba kwemvura inotenderera kana isina kugadzikana.
- Kuchinja kwekukurumidza kusina kuenzana: Mvura inofamba nekukurumidza kune rumwe rutivi rwepombi kupfuura rumwe, pane kutevedzera chimiro che "parabolic" kana "flat".
Kukanganiswa uku kunoita kuti mita inzwisise avhareji chaiyo yekumhanya kwemvura, zvichikonzera zvikanganiso zvekuyera (kazhinji kunyanya kufungidzira zvakanyanya kana kusaongorora, kubva pa±3% kusvika ±10% kana kupfuura muzviitiko zvakakomba).
2. Zvinhu Zvinoratidza Kuoma Kwekurasikirwa Kwechokwadi
Kushanda kwehurefu hwepombi pfupi yakatwasuka hakuna kufanana—zvinoenderana nezvinhu zvitatu zvakakosha:
(a) Rudzi rweKukanganiswa kweKuyerera kwemvura
Kukanganiswa kwakanyanya kunowedzera kurasikirwa kwekunyatsorongeka kupfuura kushoma, kunyangwe nepombi pfupi imwe chete yakatwasuka:
- Kukanganiswa kwakanyanya (semuenzaniso, magokora mapfupi e90°, mavharuvhu epasi, matinji, zvinoderedza): Zvinoita kuti pave nekutenderera kwakasimba kunotora nguva yakareba kuti kunyangarike. Pombi pfupi yakatwasuka (semuenzaniso, 3D kumusoro) mushure mezvibatiso izvi zvinogona kukonzera zvikanganiso zve5%–15%.
- Kusagadzikana kudiki (semuenzaniso, magokora marefu, mavharuvhu egedhi akavhurika zvizere): Kusavhiringidza kuyerera zvakanaka. Pombi pfupi yakatwasuka (semuenzaniso, 5D kumusoro) inogona kukonzera zvikanganiso zve1%–3%.
(b) Tekinoroji yeMamita (Musiyano weNguva vs. Doppler)
- Mita dzemusiyano wenguva: Dzinonyanya kunzwa kuenzana kwemafambiro emvura, sezvo dzichiverenga avhareji yekukurumidza kubva munzira shoma dze ultrasonic. Mapaipi mapfupi akatwasuka anowanzo kukonzera zvikanganiso zvakakura.
- MaDoppler meter: Haanyanyi kunzwa, sezvo achivimba nemasaini akapararira kubva mukusiyana kwemvura. Zvisinei, kutenderera kwakanyanya kunogona kukonzera kusawirirana kwekuona masaini uye kudzikira kwekururama.
(c) Zvinodiwa Pakunyatsoita Basa
- Pakushandisa zvinhu zvisina kunyatsojeka (semuenzaniso, kutarisa maitiro ese ne ±5% kutsungirira), pombi pfupi pfupi yakatwasuka (semuenzaniso, 5D kumusoro panzvimbo pe10D) ingagamuchirwa.
- Pakushandiswa kwakanyatsojeka (semuenzaniso, kugadziriswa kwekutengeserana, kuyera simba ne ±1% kutsungirira), kunyangwe kuderedzwa kudiki kwehurefu hwepombi yakatwasuka kunogona kuita kuti zviyero zvisaenderane nezvinodiwa.
3. Maitiro Ekuderedza Kurasikirwa Kwechokwadi Kubva Pamapaipi Mapfupi Akatwasuka
Kana zvipingamupinyi zvenzvimbo zvikamanikidza pombi pfupi yakatwasuka, nzira idzi dzinogona kuderedza mhedzisiro yekururamisa:
- Isa ma "flow conditioner": Zvishandiso zvakaita se "tube bundles", "honeycomb straighteners", kana "orifice-type conditioners" zvinoita kuti "flow" irambe isina kugadzikana mu3D-5D kumusoro, zvichideredza zvikanganiso kusvika ± 1%-2%.
- Shandisa masensa ane nzira dzakawanda: mamita ane nzira mbiri kana mana anoyera kumhanya panzvimbo dzakawanda papombi, uchienzanisa mapurofayiri ekuyerera asina kuenzana anokonzerwa nemapombi mapfupi akatwasuka.
- Gadzirisa nzvimbo ye sensor: Dzivisa kuisa ma transducers ipapo ipapo kana paine zvinokanganisa. Kana zvichibvira, isa mita kumusoro kwemagokora/mavharuvhu (zvinokanganisa kumusoro hazvina simba guru pakuyerera kwemvura).
- Gadzirisa zviyero zvemita zvakanaka: Mamita epamusoro anobvumira kugadzirisa nzvimbo ye transducer, kona ye beam, kana "flow profile compensation" settings kuti pave nekukanganisika.
Mhedziso
Kureba kwemapombi mapfupi akatwasuka kunokanganisa kururama nekukanganisa kudiwa kwema ultrasound meters anotevedzana nekuyerera kwemvura. Kukosha kwekukanganisa kunoenderana nerudzi rwekukanganiswa kwemvura, tekinoroji yemamita, uye zvinodiwa pakunyatsojeka. Zvisinei, nezvinogadzirisa zvakaita se flow conditioners kana multi-path sensors, kuyerwa kwakavimbika kuchiri kugona—kunyangwe kana kureba kwemapombi kwakatwasuka kuri pasi pegwara re "10D/5D".
Nguva yekutumira: Gunyana-04-2025