Kufunika kwa chitoliro cholunjika cha "10D upstream ndi 5D downstream" si lamulo lenileni la ma ultrasound flowmeters, koma ndi chitsogozo chachikulu chotsimikizira kulondola kwa muyeso. Kutalika kwenikweni kwa chitoliro cholunjika kumadalira zinthu monga mtundu wa kusokonezeka kwa kayendedwe ka madzi, mfundo yoyezera (kusiyana kwa nthawi ndi Doppler), ndi zofunikira zolondola za ntchitoyo.
1. N’chifukwa chiyani “10D Upstream & 5D Downstream” Ikulimbikitsidwa?
Ma ultrasound flowmeters amawerengera kuchuluka kwa madzi kutengera nthawi yofalikira (njira yosiyana ndi nthawi) kapena kusintha kwa ma frequency (njira ya Doppler) ya mafunde a ultrasound mu madzi. Izi zimadalira kuyenda kokhazikika komanso kokhazikika (bwino kwambiri, liwiro lofanana kudutsa gawo lonse la chitoliro).
Zolumikizira monga zigongono, ma tee, ma valve, kapena zochepetsera zimasokoneza mawonekedwe a kayendedwe ka madzi (kupanga ma swirls, eddies, kapena asymmetric velocity distribution), zomwe zingayambitse zolakwika muyeso. Malangizo a "10D upstream + 5D downstream" amapereka malo okwanira kuti kayendedwe kosokonezeka kakhazikikenso musanalowe mu gawo loyezera la mita.
2. Zosintha Zosinthasintha: Kodi “10D/5D” Ingamasulidwe Liti Kapena Iyenera Kutsatiridwa Mosamalitsa?
Kutalika kwa chitoliro cholunjika chofunikira kumasiyana malinga ndi mikhalidwe inayake, monga momwe zasonyezedwera patebulo pansipa:
| Chitsanzo | Utali Wofunika wa Chitoliro Chowongoka | Chifukwa |
|---|---|---|
| Kusokonezeka pang'ono kwa madzi (monga, zigongono zazitali za 90°, ma valve a chipata otseguka kwathunthu) | Kumtunda: 5D–8D Pansi pa mtsinje: 3D–5D | Mavuto ochepa amatha msanga; mapaipi afupiafupi owongoka ndi okwanira kuti madzi ayende bwino. |
| Kusokonezeka kwakukulu kwa kayendedwe ka madzi (monga, zigongono zazifupi za 90°, ma globe valves, ma tees) | Kumtunda: ≥10D Pansi pa mtsinje: ≥5D | Kuzungulira/kuzungulira kwakukulu kumafuna mtunda wautali kuti ukhale wokhazikika. |
| Mapulogalamu olondola pang'ono (monga, kuyang'anira njira zonse, kutsatira kayendedwe ka zinthu kosafunikira) | Kumtunda: 3D–5D Pansi pa mtsinje: 2D–3D | Kulekerera zolakwika zazing'ono (±3%–±5%) kumalola kusinthasintha kwakukulu. |
| Mapulogalamu olondola kwambiri (monga mgwirizano wamalonda, kuyeza mphamvu, kuchuluka kwa mankhwala) | Kumtunda: 10D–15D Pansi pa mtsinje: 5D–8D | Kufunikira kolondola kwambiri (±1%–±2%) kumafuna mikhalidwe yoyenera ya kayendedwe ka madzi. |
| Mamita olumikizira zida zolumikizirana ndi ma doppler | Yosinthasintha pang'ono (monga, pamwamba pa 5D–8D) | Ma Doppler mita sakhudzidwa kwambiri ndi kuchepa kwa kayendedwe ka kayendedwe ka madzi poyerekeza ndi ma time-difference mita. |
3. Mayankho Pamene Utali Wowongoka wa Chitoliro Siwokwanira
Ngati malo a mapaipi ndi ochepa ndipo "10D/5D" sangathe kukwaniritsidwa, njira zotsatirazi zitha kuchepetsa kusokonezeka kwa kayendedwe ka madzi ndikuwonjezera kulondola:
- Ikani zoziziritsira madzi: Zipangizo monga machubu, uchi, kapena mbale za orifice zimatha kuwongola madzi osokonezeka patali (kuchepetsa chitoliro cholunjika chomwe chimafunikira kupita pamwamba kufika pa 3D-5D).
- Konzani bwino malo oyika masensa: Pewani kuyika masensa molunjika pansi pa chisokonezo; ngati n'kotheka, ikani pamwamba pa zigongono/ma valavu (chisokonezo chakumtunda sichikhudza kwambiri kuposa chakumunsi).
- Sinthani mtunda/ngodya ya sensa: Mamita ena apamwamba olumikizirana amalola kusintha bwino mtunda wa transducer kapena ngodya ya beam kuti athetse kusayenda bwino kwa kayendedwe ka madzi.
- Gwiritsani ntchito masensa a njira zambiri: mamita a njira ziwiri kapena zinayi olumikizirana kuti muyese liwiro pa malo osiyanasiyana kudutsa gawo la chitoliro, poganizira kusiyana kwa mawonekedwe a flow profile komwe kumachitika chifukwa cha kusowa kwa chitoliro cholunjika.
Mapeto
Ngakhale kuti "10D upstream ndi 5D downstream" ndi maziko otetezeka pazochitika zambiri zamafakitale, ma frequency flowmeters opangidwa ndi ma clamp-on ultrasound safuna kutalika kotere nthawi zonse. Chofunika kwambiri ndikufananiza kutalika kwa chitoliro cholunjika ndi mulingo wosokoneza kayendedwe ka madzi ndi zosowa zolondola za ntchitoyo. Malo akakhala ochepa, ma flow conditioner kapena ma multi-path sensors amatha kulipira bwino chitoliro cholunjika chosakwanira, kuonetsetsa kuti kuyeza kwake kuli kodalirika.
Nthawi yotumizira: Sep-04-2025