Tsis yog-Kev ntsuas qhov hnyav ntawm PFA lub rhaub dej kub yog qhov tseem ceeb rau kev kwv yees lub neej tseem tshuav hauv kev ua haujlwm puas lossis xeb. Portable ultrasonic thickness gauge nrog ib tug nkhaus ncua kab sojntsuam (nrog rau lub rhaub lub 25 hli txheej txoj kab uas hla) yuav ntsuas seem phab ntsa thickness nrog ib tug raug ntawm 0.05 hli. Txoj kab nkhaus ncua kev ua kom zoo sib xws thiab tshem tawm qhov xav tau ntawm qhov chaw tiaj tus. Qhov kev sojntsuam xa cov mem tes ultrasonic los ntawm PFA; lub sij hawm - ntawm - ya mus rau cov hlau core reflection yog hloov mus rau thickness siv lub suab nrov tshaj plaws ntawm PFA (2,300–2,400 m / s). Kev ntsuas yog nrawm (<5 seconds per point) and can be performed on an installed heater without draining the tank (through a sight port or by temporarily lowering the liquid level). Regular monitoring every 6–12 months allows predictive replacement before perforation.
Cov Khoom Siv Khoom Siv
| Cheebtsam | Specification | Sau ntawv |
|---|---|---|
| Ultrasonic thickness ntsuas | Basic handheld (piv txwv li, Olympus 45MG, Dakota Ultrasonics) | Tib - qauv hom |
| Transducer (kev sojntsuam) | 5-10 MHz, ib leeg siv lead ua, nrog nkhaus ncua kab | Radius matched rau lub rhaub OD (12.5 hli vojvoog rau 25 hli OD) |
| Ncua kab khoom | PEEK los yog acrylic | Acoustic pob tshab, hnav-resistant |
| Couplant | Dej, gel, los yog roj | Muab acoustic coupling |
| Calibration thaiv | PFA ntawm cov hlau (piv txwv los ntawm cov khoom siv hluav taws xob los yog cov thickness paub) | Tsim suab nrawm |
Kauj Ruam -los ntawm - Kauj Ruam Kev Ntsuas
Kauj Ruam 1: Npaj qhov chaw ntsuas.Txo cov kua dej hauv qab lub rhaub (yog tias ua tau) lossis nkag los ntawm qhov chaw nres nkoj sab. Ntxuav lub PFA saum npoo nrog ib daim ntaub mos kom tshem tawm cov nplai, biofilm, lossis cov khoom xoob xoob. Ib tug du, huv si saum npoo txhim kho cov teeb liab zoo.
Kauj ruam 2: Calibrate lub ntsuas.Muab qhov kev sojntsuam nkhaus rau ntawm cov qauv siv ntawm PFA thickness uas paub (piv txwv li, ntu tshiab lub rhaub lossis lub ntsuas ntsuas nrog PFA txheej ntawm cov paub tuab tuab sib txuas rau hlau). Kho qhov ntsuas lub suab tshaj tawm kom txog thaum lub teeb pom kev zoo sib xws nrog tus nqi paub. Hom PFA longitudinal suab tshaj tawm: 2,350–2,380 m / s. Rau qhov raug zoo tshaj plaws, siv lub ntsuas ntsuas ntsuas los ntawm tib qib PFA.
Kauj Ruam 3: Siv couplant.Siv ib qho me me ntawm ultrasonic gel los yog dej rau saum npoo. Rau submerged rhaub, dej nws tus kheej ua raws li ib tug couplant; kev sojntsuam tuaj yeem siv ntub dej.
Kauj Ruam 4: Siv cov ntsuas.Muab qhov nkhaus sojntsuam perpendicular mus rau lub rhaub axis (yog li txoj kab ncua hu rau lub raj ncig). Tuav ruaj khov. Lub gauge qhia thickness. Sau tus nqi. Ua ntsuas ntawm ntau lub ntsiab lus:
Circumferential txoj haujlwm0℃(sab saum toj), 90 degree, 180 degree, 270 degree
Axial txoj haujlwm: Hauv qab (50 hli los ntawm lub ntsis), nruab nrab (ib nrab ntawm cov cua sov ntev), sab saum toj (50 hli hauv qab txias kawg). Rau lub rhaub ntev, ntxiv 3-5 cov ntsiab lus ntxiv.
Kauj ruam 5: Sau thiab daim ntawv qhia.Tsim ib daim ntawv qhia tuab. Txheeb xyuas thaj chaw ntawm qhov chaw nyias nyias (piv txwv li, saum npoo hauv cov cua sov kab rov tav, sab saud hauv cov kev pabcuam ntws).
Kev ntsuas qhov tseeb thiab kev txwv
| Parameter | Tus nqi | Sau ntawv |
|---|---|---|
| Lub suab nrawm ntawm PFA | 2,350–2,380 m/s | Nws txawv me ntsis nrog crystallinity |
| Yam raug | ± 0.03-0.05 hli | Nrog calibration kom raug |
| Yam tsawg kawg nkaus ntsuas thickness | 0.3-0.5 hli | Hauv qab no, teeb liab ploj |
| Cov nyhuv ntawm qhov kub thiab txias | Kev nrawm hloov los ntawm 0.1% / degree | For >50 degree, ntsuas ntawm lub tshuab cua txias lossis siv kev kho |
| Nto roughness nyhuv | Rougher nto txo cov teeb liab | Sandblasted PFA tuaj yeem xav tau ntau dua |
Thinning Limit and Replacement Criteria
| Thickness seem (mm) | Kev ua |
|---|---|
| >80% of original (e.g., >1.6 hli ntawm 2 hli phab ntsa) | Kev ua haujlwm li qub |
| 60-80% ntawm thawj (1.2-1.6 hli) | Saib xyuas txhua 6 lub hlis |
| 40-60% ntawm thawj (0.8-1.2 hli) | Npaj hloov pauv hauv 12 lub hlis |
| <0.8 mm | Hloov tam sim ntawd (kev pheej hmoo ntawm perforation) |
Rau cov ntawv thov tseem ceeb (siab siab, corrosive fluids), siv qhov kev txuag ntau dua: hloov thaum thickness poob qis dua 1.0 hli.
Piv txwv teb
Ib tsob nroj mining slurry siv PFA cov cua sov hauv cov silica xuab zeb slurry. Txhua txhua 6 lub hlis, tus neeg teb xov tooj ntsuas phab ntsa tuab siv lub ntsuas ntsuas ntsuas ntsuas nrog lub ntsuas ntsuas nkhaus (sib npaug rau 25 hli OD lub rhaub). Tom qab 18 lub hlis, qhov tuab ntawm sab saud tau nqis los ntawm 2.1 hli mus rau 1.1 hli. Cov nroj tsuag proactively hloov lub rhaub thaum lub sij hawm kaw. Tsis muaj kev npaj ua tsis tiav tau tshwm sim. Cov nroj tsuag txuas ntxiv lub neej cua sov los ntawm qhov nruab nrab ntawm 14 lub hlis (reactive) mus rau 22 lub hlis (predictive). Lub ntsuas ultrasonic them rau nws tus kheej tom qab thawj zam kev hloov pauv thaum muaj xwm ceev.
Kev daws teeb meem tsis zoo
| Teeb meem | Tej yam ua rau | Kev daws |
|---|---|---|
| Tsis nyeem ntawv thickness | Kev sib txuas tsis zoo lossis qhov nrawm nrawm | Re- thov cov couplant, kos calibration |
| Hloov pauv kev nyeem ntawv | Rough nto los yog voids | Siv ntau dua viscosity couplant, du nto |
| thinner tshaj qhov xav tau | Kev tshaj tawm tsis raug (siv tus nqi PTFE) | Re-calibrate nrog PFA tus qauv |
| Thicker tshaj qhov xav tau | Tshawb nrhiav tsis yog perpendicular | Kho lub kaum sab xis, siv nkhaus ncua kab |
Xaus: Ultrasonic Thickness Measurement with Curved Probe muab qhov tseeb, Tsis yog -Kev saib xyuas phab ntsa puas
Portable ultrasonic thickness gauge nruab nrog ib tug nkhaus ncua kab sojntsuam (lub vojvoog sib tw rau 25 hli OD) tso cai rau tsis yog - ntsuas kev puas tsuaj ntawm cov seem PFA phab ntsa tuab ntawm cov cua sov nrog ± 0.05 hli raug. Kev saib xyuas tsis tu ncua (txhua 6-12 lub hlis) tso cai rau kev hloov pauv ua ntej perforation, zam kev poob qis. Cov txheej txheem ua haujlwm los ntawm dej (siv dej raws li couplant) thiab tuaj yeem ua tau yam tsis muaj dej hauv lub tank. Rau abrasive los yog corrosive kev pab cuam, ultrasonic thickness ntsuas yog tus nqi tshaj -zoo kwv yees txij nkawm cov cuab yeej. Kev ntsuas 10 feeb txuag tau 2,000heaterreplacementand2,000heaterreplacementand10,000 hauv downtime. Ntsuas tuab, npaj hloov, thiab pw tsaug zog zoo. Lub suab nthwv dej paub qhov qhov muag pom tsis tau. Cia siab rau qhov ntsuas. Nws yuav qhia rau koj thaum hloov. Tsis xav ntau ntxiv. Tsis muaj kev poob haujlwm ntxiv. Tsuas yog cov ntaub ntawv.
