Inde, kutalika kwa chitoliro chowongoka chachifupi kungakhudze kwambiri kulondola kwa ma frequency flowmeter a clamp-on—pokhapokha ngati achepetsedwa ndi njira zina. Chifukwa chachikulu chili momwe ma ultrasound mita amadalira pa mayendedwe okhazikika kuti awerengere kuchuluka kwa mayendedwe molondola. Pansipa pali kusanthula kwatsatanetsatane kwa kukhudzidwa, njira zoyambira, ndi zinthu zomwe zimakhudza:
1. Chifukwa Chake Utali Waufupi Wowongoka wa Chitoliro Umalepheretsa Kulondola
Ma flowmeter a ultrasound opangidwa ndi clamp-on amagwira ntchito pogwiritsa ntchito njira yosiyana nthawi (kuyeza liwiro la mafunde a ultrasound pamwamba ndi pansi) kapena njira ya Doppler (kudziwa kusintha kwa ma frequency kuchokera ku tinthu/ma thovu omwe ali mumadzimadzi). Maukadaulo onsewa amadalira mawonekedwe oyenda bwino komanso ozungulira a turbulent flow kudutsa gawo lonse la chitoliro.
Ngati kutalika kwa chitoliro chowongoka sikukwanira (monga, kochepera kuposa 5D–10D yomwe ikuyembekezeredwa kukwera pamwamba pa mtsinje), ma profiles a kayendedwe ka madzi amasokonekera chifukwa cha:
- Kuzungulira/kuzungulira: Kumachitika chifukwa cha zigongono, ma tee, ma valve, kapena zochepetsera, zomwe zimapangitsa kuti madzi aziyenda mozungulira kapena mosokonezeka.
- Kuthamanga kwa liwiro losafanana: Madzi amayenda mofulumira mbali imodzi ya chitoliro kuposa inzake, m'malo motsatira mawonekedwe a "parabolic" kapena "flat".
Kusokonekera kumeneku kumapangitsa kuti mita imvetse molakwika liwiro lenileni la madzi, zomwe zimapangitsa kuti pakhale zolakwika muyeso (nthawi zambiri kuyerekezera mopitirira muyeso kapena kunyalanyaza, kuyambira ± 3% mpaka ± 10% kapena kuposerapo pazochitika zazikulu).
2. Zinthu Zomwe Zimatsimikizira Kuopsa kwa Kutayika Kolondola
Mphamvu ya kutalika kwa chitoliro cholunjika chachifupi si yofanana—zimadalira zinthu zitatu zofunika:
(a) Mtundu wa Kusokonezeka kwa Kuyenda kwa Madzi
Kusokonezeka kwakukulu kumawonjezera kutayika kwa kulondola kuposa kofatsa, ngakhale ndi chitoliro chachifupi chomwecho cholunjika:
- Zovuta zazikulu (monga, zigongono zazifupi za 90°, ma globe valves, ma tees, zochepetsera): Zimapanga ma swirls amphamvu omwe amatenga nthawi yayitali kuti atuluke. Chitoliro chachifupi cholunjika (monga, 3D upstream) pambuyo pa zolumikizira izi chingayambitse zolakwika za 5%–15%.
- Kusokonezeka pang'ono (monga zigongono zazitali, ma valve otseguka kwathunthu a chipata): Kusokoneza kuyenda kochepa. Chitoliro chachifupi cholunjika (monga, 5D mmwamba) chingayambitse zolakwika za 1%–3%.
(b) Ukadaulo wa Mamita (Kusiyana kwa Nthawi ndi Doppler)
- Mamita osiyanitsa nthawi: Amazindikira kwambiri kusinthasintha kwa mawonekedwe a flow profile, chifukwa amawerengera liwiro lapakati kuchokera ku njira zochepa za ultrasound. Mapaipi afupiafupi owongoka nthawi zambiri amabweretsa zolakwika zazikulu.
- Ma Doppler meter: Osakhudzidwa kwambiri, chifukwa amadalira zizindikiro zobalalika kuchokera ku kusiyana kwa madzi. Komabe, kuzungulira kwakukulu kungayambitsebe kuzindikira zizindikiro kosasinthasintha komanso kuchepa kwa kulondola.
(c) Zofunikira pa Kulondola kwa Kugwiritsa Ntchito
- Pakugwiritsa ntchito njira zolondola pang'ono (monga, kuwunika njira zonse ndi kulekerera kwa ±5%), chitoliro cholunjika chachifupi pang'ono (monga, 5D m'malo mwa 10D) chingakhale chovomerezeka.
- Pakugwiritsa ntchito molondola kwambiri (monga mgwirizano wamalonda, kuyeza mphamvu ndi kulekerera kwa ±1%), ngakhale kuchepetsa pang'ono kutalika kwa chitoliro chowongoka kungapangitse kuti miyeso isatsatire.
3. Momwe Mungachepetsere Kutayika Kolondola Kuchokera ku Mapaipi Afupi Olunjika
Ngati malo ochepa akukakamiza chitoliro chowongoka chachifupi, njira izi zitha kuchepetsa zotsatira zolondola:
- Ikani zoziziritsira madzi: Zipangizo monga machubu opachikira madzi, zowongolera uchi, kapena zoziziritsira madzi zamtundu wa orifice zimapangitsa kuti madzi asamayende bwino mu 3D-5D, zomwe zimachepetsa zolakwika kufika pa ± 1%-2%.
- Gwiritsani ntchito masensa okhala ndi njira zambiri: mamita okhala ndi njira ziwiri kapena zinayi olumikizirana kuti muyese liwiro pamalo osiyanasiyana kudutsa chitolirocho, poganizira kuchuluka kwa ma profiles oyenda osafanana omwe amayambitsidwa ndi mapaipi afupiafupi owongoka.
- Konzani bwino malo oika sensa: Pewani kuyika ma transducer nthawi yomweyo mukakumana ndi vuto. Ngati n'kotheka, ikani mita pamwamba pa zigongono/ma valavu (zovuta zam'mwamba sizikhudza kwambiri kayendedwe ka madzi).
- Konzani bwino magawo a mita: Mamita apamwamba amalola kusintha malo osinthira, ngodya ya beam, kapena makonda a "flow profile compensation" kuti akonze zolakwika.
Mapeto
Kutalika kwa mapaipi olunjika afupiafupi kumakhudza kulondola mwa kusokoneza kufunikira kwa mita yoyendera madzi yokhazikika. Kuopsa kwa cholakwika kumadalira mtundu wa kusokonezeka kwa madzi, ukadaulo wa mita, ndi zofunikira zolondola. Komabe, ndi zochepetsera monga zowongolera madzi kapena masensa a njira zambiri, kuyeza kodalirika kumakhala kothekabe—ngakhale kutalika kwa mapaipi olunjika kutsika pansi pa malangizo a “10D/5D”.
Nthawi yotumizira: Sep-04-2025