Iimfuno zobugcisa ze-Electromagnetic Flowmeters: Ukuqinisekisa ukuchaneka nokuthembeka

1. Imigangatho yokuSebenza yoLinganiso

1.1 Ukuchaneka Nokuphindaphindwa

• Ukuchaneka Okuqhelekileyo:Ii-EMFkufuneka ifikelele kwi-±0.5% ukuya kwi-±1% yesantya sokuhamba esilinganisiweyo kulo lonke uluhlu lokusebenza, kunye neemodeli zeprimiyamu ezibonelela ngokuchaneka kwe-±0.2%. Oku kufuneka kuqinisekiswe phantsi kweemeko ezimiselweyo (umz., i-ISO 9104 yokulinganisa ukuhamba kolwelo).
• Ukuphinda-phinda: Utshintsho kwiimilinganiselo eziphindaphindwayo akufuneki ludlule kwi-±0.1% yesantya sokuhamba kwamanzi ukuqinisekisa ukuhambelana kwiinkqubo ezibalulekileyo ezifana nokulinganisa iikhemikhali okanye ukuhlawuliswa kwamanzi.

1.2 Uluhlu lokuhamba kwamanzi kunye nomlinganiselo wokujika

• Uluhlu lweVelocity: Iyakwazi ukulinganisa isantya sokuhamba kwamanzi ukusuka kwi-0.1 m/s (izicelo zokuhamba kwamanzi aphantsi njengeenkqubo zelebhu) ukuya kwi-15 m/s (iipayipi zoshishino ezihamba ngamandla aphezulu).
• Umlinganiselo wokutshintsha: Umlinganiselo ophantsi we-20:1 (umz., ukulinganisa i-0.5–10 m/s) uqhelekile, kwaye iimodeli eziphambili zibonelela nge-100:1 kwizicelo ezahlukeneyo.

1.3 Ukuqhuba Ulwelo

• Ulawulo oluphantsi: Ulwelo kufuneka lube nolawulo oluphezulu ≥5 μS/cm (kwiilwelo ezisekelwe emanzini) ukuze kukhuthazwe amandla e-electromotive anokulinganiswa (i-EMF). Kwizilwelo eziphantsi kolawulo oluphezulu (umz., amanzi angenawo i-ionized), ii-electrode ezikhethekileyo kunye nee-amplifier zinokufuneka (≥0.5 μS/cm).
• Uzinzo lokuqhuba: Utshintsho olukhawulezileyo kwindlela yokuqhuba (umz., ngenxa yokuxuba iikhemikhali) lunokubangela ukushukuma komlinganiselo, nto leyo ebangela ukuba kubekho ii-algorithms zokuhlawula ezakhelwe ngaphakathi.

2. Iimfuno zeNdalo kunye nezokusebenza

2.1 Uvavanyo lobushushu kunye noxinzelelo

• Ubushushu bolwelo:
  • Umgangatho: -20°C ukuya kwi-120°C (umz., emanzini namanzi amdaka).
  • Ubushushu obuphezulu: Ukuya kuthi ga kwi-200°C (kunye nee-liners ezikhethekileyo ezifana ne-PTFE okanye i-ceramic kwiinkqubo zoshishino).
• Uxinzelelo lweMibhobho:
  • Uxinzelelo oluphantsi: ≤1.6 MPa (exhaphakileyo kwiinkqubo zikamasipala).
  • Uxinzelelo oluphezulu: Ukuya kuthi ga kwi-40 MPa (kwii-oyile negesi okanye usetyenziso lwe-hydraulic), ezifuna uyilo lweflange oluqinileyo kunye novavanyo loxinzelelo ngokwe-ASME B16.5 nganye.

2.2I-electromagneticUkuhambelana (EMC)

• Kufuneka ithobele imigangatho ye-EMC (umz., i-IEC 61326-1) ukuze imelane nokuphazamiseka okuvela kwiimoto, iitransformer, okanye imithombo yerediyo (RF). Iintambo ezikhuselweyo kunye neendawo eziphantsi komhlaba zibalulekile ekunciphiseni ingxolo.

2.3 Ukuqhuma kunye nokumelana nokugqwala

• Ukhuseleko Lokuqhuma: Kwiindawo ezinobungozi (umz., izityalo ze-petrochemical),I-EMFkufuneka bahlangabezane neziqinisekiso ezifana ne-ATEX, i-IECEx, okanye i-NEC 500 zoyilo olukhuselekileyo (IS) okanye olungenamlilo.
• Ukumelana nokugqwala: Iindawo ezimanzi (ii-electrode kunye nee-liners) kufuneka zimelane nolwelo olunamandla:
  • IiLiners: I-PTFE (i-polytetrafluoroethylene) yokumelana neekhemikhali, i-polyurethane yokuthintela ukurhawuzelelwa (umz., iislurries), okanye i-ceramic yokuthintela ubushushu obuphezulu/ukurhawuzelelwa.
  • Ii-electrode: Izinto ezifana nentsimbi engagqwaliyo engama-316L, iHastelloy C, okanye i-tantalum kwiincindi ezidla ngokugqwala (umz., amanzi olwandle, ii-asidi).

3. Iimfuno zoFakelo kunye neeMpayiphu

3.1 Ukubaleka Kwemibhobho Ethe Tye

• Ukunyuka komsinga: Ubuncinane iidayamitha zepayipi ezi-5–10 zombhobho othe tye phambi kwemitha ukuqinisekisa ukuhamba okuphuhlileyo, ukunciphisa ukuxinana kweengqiniba, iivalvu, okanye ii-tee.
• Ezantsi: Iipayipi ezi-2–5 ububanzi bombhobho othe tye emva komlinganiselo wombane ukuthintela ukuphazamiseka kokubuyela umva.

3.2 Indlela yoFakelo

• Ingafakelwa ngokuthe tye, ngokuthe nkqo, okanye etyekele, kodwa ukufakwa ngokuthe nkqo (okunokuhamba okuphezulu) kukhethwa kwiindawo ezimanzi eziqinileyo ukuthintela ukubola kwenkunkuma.
• Kwimibhobho yegesi-yolwelo enezigaba ezimbini, ukufakwa ngokuthe tye kunye nokufaka umoya ngokufanelekileyo kubalulekile ukuze kuthintelwe ukuqokelelana kwamaqamza kwityhubhu yokulinganisa.

3.3 Ukubeka isiseko sombane

• Kufuneka kufakwe i-grounding ring okanye i-electrode ukuze kususwe umahluko onokubakho phakathi kolwelo kunye nemitha, ukuqinisekisa ukuchanekaI-EMFumlinganiselo. Oku kubaluleke kakhulu kwimibhobho engasebenzisi mbane (umz., iPVC).

4. Isiphumo seSignali kunye nokuHlanganisa kweDijithali

4.1 Iimpawu ze-Analog nezeDijithali

• I-Analog: Isiphumo se-4–20 mA (esodwa) esine-≤0.1% linearity error, ifanelekile kwiinkqubo zolawulo lwexesha elidlulileyo.
• Idijithali: MODBUS RTU/TCP, HART, okanye iProfibus DP yokusasazwa kwedatha ngexesha langempela, okuvumela ukuhlanganiswa neenkqubo ze-SCADA okanye amaqonga e-IoT asekelwe kwilifu.

4.2 Ukufakwa kwedatha kunye nokuxilongwa kwayo

• Imemori eyakhelwe ngaphakathi yokugcina idatha yokuhamba, iziganeko ze-alamu, kunye neeparamitha zokuxilonga (umz., i-electrode coating, i-liner wear). Iimodeli eziphambili zibonelela ngezilumkiso zokugcinwa kwangaphambili ngoqhagamshelo olungenazingcingo (umz., iBluetooth, i-4G).

5. Ukulinganisa kunye neSatifikethi

5.1 Imigangatho yoLungiso

• Ukulinganiswa kwefektri ngokwemigangatho elandelekayo (umz., iilebhu ezivunyiweyo yi-ISO 17025) kusetyenziswa ulwelo olungqinisisiweyo (ngesiqhelo ngamanzi). Ukulinganiswa kwentsimi kunokufuna ukuthwalwaukuhambaizixhobo zokuqinisekisa okanye iindlela zokuthelekisa.
• Kwizicelo zokudluliselwa kokugcinwa (umz., urhwebo lwamanzi), iimitha kufuneka zivavanywe rhoqo (umz., ngonyaka) kwaye zihambelane nemigangatho yemetrology esemthethweni (umz., i-OIML R49, i-MID kwi-EU).

5.2 Iziqinisekiso zoshishino

• Amanzi kaMasipala: NSF/ANSI 61 yezixhobo zokunxibelelana namanzi okusela.
• Ukutya Neziselo: 3-A Sanitary Standards okanye i-EHEDG yoyilo olucocekileyo (ii-liners ezigudileyo, ii-electrodes ezingenamiqolo).
• Imboni: Isatifikethi se-CSA, CE, okanye i-UL sokhuseleko kunye nokusebenza kakuhle kwiimarike ekujoliswe kuzo.

6. Ukuthembeka kunye nokugcinwa

6.1 Uzinzo Lwexesha Elide

• Ukutyibilika ngokuhamba kwexesha akufuneki kudlule i-±0.2% yesikali esipheleleyo ngonyaka, kuxhaswa yimbuyekezo yobushushu kunye nemisebenzi ye-auto-zero yokulwa ne-electrode polarization.
• I-MTBF (Ixesha Eliphakathi Phakathi Kokusilela): ≥Iiyure ezili-100,000 kwizixhobo ze-elektroniki, kunye nezixhobo ezinokutshintshwa (umz., iibhetri kwiitransmitter ezisebenzisa ibhetri) ezenzelwe inkonzo yasentsimini elula.

6.2 Uyilo oluchasene nokungcolisa

• Kwizinto ezinamathelayo okanye ezikhupha ulwelo (umz., amanzi amdaka), iimpawu ezifana nokuvuthuza nge-pulsed, ukuxubha nge-electrode, okanye ukucoca nge-ultrasound kunciphisa ukwakheka kunye nokugcina ukuthembeka kokulinganisa.

Isiphelo