Iimitha zokuhamba ze-electromagnetic (iimitha ze-EM) zisetyenziswa kakhulu kwizicelo zoshishino, zomasipala, kunye nezonyango lwamanzi ngenxa yokuchaneka kwazo okuphezulu, ukukwazi ukuphatha ulwelo oluqhubayo, kunye nokuncipha koxinzelelo. Nangona kunjalo, ukusebenza kwazo kuxhomekeke kakhulu ekufakweni okufanelekileyo—kwanomitha we-EM ophucukileyo uya kusilela ukuhambisa idatha ethembekileyo ukuba ifakwe ngokuchanekileyo. Ukususela kwiimeko zemibhobho ukuya kwiimeko zokusingqongileyo, izinto ezininzi ezibalulekileyo kufuneka zijongwane nazo ukuqinisekisa ukusebenza kakuhle. Eli nqaku lichaza izinto ezibalulekileyo ekufuneka ziqwalaselwe xa kufakwa iimitha ze-EM kwiinkqubo zemibhobho.
1. Iimfuneko zobude obuthe tye bepayipi
Ukuxinana kombhobho yenye yezona zinto zisongela kakhulu ukuchaneka kwemitha ye-EM. Xa ulwelo luhamba ngeengqiniba, iivalvu, ii-reducers, okanye iimpompo, ludala ii-swirls, ii-eddies, okanye iiprofayili zesantya esingalinganiyo eziphazamisa intsimi ye-electromagnetic esetyenziswa yimitha ukulinganisa ukuhamba. Ukunciphisa oku, ukunamathela ngokungqongqo kwizikhokelo zobude bombhobho othe tye onyukayo nophantsi kubalulekile.
Uninzi lwabavelisi lucebisa ubuncinci obuphindwe kahlanu ububanzi bombhobho (5D) wombhobho othe tye ongasentla kwemitha ye-EM kunye nobude bombhobho (3D) obuphindwe kathathu. Umzekelo, ukuba ufaka imitha kumbhobho we-intshi ezi-4 (100mm), kufuneka kubekho ubuncinci ii-intshi ezingama-20 (500mm) zombhobho othe tye ngaphambi komitha kunye nee-intshi ezili-12 (300mm) emva koko. Kwimeko apho indawo incinci (umz., amagumbi oomatshini aqinileyo), ukufaka ii-flow conditioners (ezifana nee-straighteners okanye iipleyiti ezineembobo) kunokunciphisa ubude obufunekayo obuthe tye ngokuzinzisa iprofayili yokuhamba. Kuphephe ukufaka imitha kwangoko emva kweepompo okanye iivalvu zokulawula, njengoko ezi zinto zivelisa i-turbulence enkulu.
2. Ubungakanani bePipe kunye nokuhambelana kweMitha
Ubungakanani bemibhobho kunye neemitha ezingalinganiyo kukhokelela ekufundweni okungachanekanga kunye nokulahlekelwa koxinzelelo okwandisiweyo. Iimitha ze-EM zenzelwe ukuhambelana nobubanzi bemibhobho ethile (ubukhulu obuqhelekileyo), kwaye ukukhetha ubungakanani obungalunganga kuyawuphazamisa umsebenzi wazo.
- Musa ukunciphisa ubungakanani bomlinganiselo: Imitha engalinganiyo idala indlela emxinwa yokuhamba kwamanzi, inyusa isantya solwelo kunye nokwehla koxinzelelo. Oku kungonakalisa ulwelo lomlinganiselo ngokuhamba kwexesha kwaye kubangele ukufundwa komlinganiselo ophezulu okungachanekanga.
- Musa ukuyigqithisa imitha: Imitha enkulu kakhulu ibangela isantya esiphantsi solwelo, ingakumbi xa kutyibilika amanzi aphantsi. Ekubeni iimitha ze-EM zixhomekeke kwisantya esihambelanayo ukuvelisa isignali ye-electromagnetic enokulinganiswa, isantya esiphantsi sinokukhokelela ekufundweni okungazinzanga okanye ukungaphumeleli ukubona ukuhamba kwamanzi ngokupheleleyo.
Ukuba ubungakanani bombhobho abuhambelani nobukhulu obuqhelekileyo beemitha ze-EM (umz., umbhobho we-intshi ezi-5 ongenamitha ehambelanayo), sebenzisa ii-reducers okanye ii-expanders ezifakelwe ubuncinci i-10D phezulu kwemitha ukuze utshintshele phakathi kobukhulu. Qinisekisa ukuba ii-reducers zigxile (hayi ezingaqhelekanga) ukuze uphephe ukudala ukusasazwa kokuhamba komoya okungalinganiyo.
3. Ukuzaliswa kolwelo kunye nokuQwalasela ukufakwa
Iimitha ze-EM zifuna ukuba umbhobho uzaliswe ngokupheleleyo lulwelo ngexesha lokusebenza—iipokotho zomoya okanye zegesi ziphazamisa intsimi ye-electromagnetic kwaye zibangele ukufundwa okungaguqukiyo. Ukujongwa kokufakwa kudlala indima ebalulekileyo ekuthinteleni ukuqokelelwa komoya:
- Ukufakelwa ngokuthe tye: Eyona ndlela ikhethwayo yokusetyenziswa kakhulu. Faka imitha ukuze ii-electrode zayo zibekwe kwi-45° ukuya kwi-90° ukusuka ezantsi kombhobho (kungekhona ngqo ezantsi). Oku kuthintela ukudibana kwe-electrode nenkunkuma okanye ubumdaka obuhlala kwisiseko sombhobho, obunokubangela ukungcola. Kukwathintela iipokotho zomoya ukuba zingaqokeleli kufutshane nee-electrode (umoya udla ngokunyuka uye phezulu kwimibhobho ethe tye).
- Ukufakelwa ngokuthe nkqo: Kufanelekile ukufakelwa ulwelo oluya phezulu (ungaze uye ezantsi, njengoko oku kunokubangela ukuba umoya ubambeke kwimitha). Ukufakelwa ngokuthe nkqo kuqinisekisa ukuba umbhobho uhlala ugcwele kwaye kunceda ukuthintela ukwakheka kwenkunkuma. Nangona kunjalo, qinisekisa ukuba imitha ilinganiswe ngokufakelwa ngokuthe nkqo—ezinye iimodeli zinemiqathango yobunzima okanye indlela yokuhamba.
- Kuphephe ukufakelwa kwiindawo eziphezulu zemibhobho: Ukufaka imitha kwindawo ephezulu yombhobho kwandisa umngcipheko weepokotho zomoya. Ukuba akunakuphepheka, yongeza ii-air vents phezulu kombhobho ukuze ukhuphe igesi evalelekileyo.
4. Ukuhambelana kwezinto kunye noKhuseleko lweNdalo
Iindawo ezimanzi zemitha ye-EM (ukulinganisa i-tube lining, ii-electrode) kunye nezindlu zangaphandle kufuneka zihambelane nolwelo kunye nokusingqongileyo ukuqinisekisa ukuba zihlala ixesha elide kwaye zikhuselekile.
- Iindawo ezimanzi: Kwizinto ezibangela ukubola (umz., amanzi amdaka ane-asidi, izisombululo zeekhemikhali), sebenzisa izinto ezifakwe kwi-linings ezifana ne-PTFE (Teflon) okanye i-FKM (Viton) kunye nee-electrodes ezenziwe nge-Hastelloy C okanye i-titanium. Kwizinto ezibangela ukubola (umz., udaka olunezimbiwa), khetha izinto eziqinisiweyo (i-polyurethane) ukuze zingagugi. Kwizinto ezisetyenziswa emanzini okusela, qinisekisa ukuba izinto ziyahlangabezana nemigangatho ye-NSF/ANSI 61 okanye ye-WRAS ukuze kuthintelwe ungcoliseko.
- Izindlu zangaphandle: Kwiindawo ezirhabaxa (umz., ukufakelwa kwangaphandle, izakhiwo zoshishino ezinothuli okanye ukufuma), khetha iimitha ezinereyithingi ye-IP (Ingress Protection) ye-IP65 ubuncinane (engangeni thuli kwaye ikhuselwe kwiijethi zamanzi ezinoxinzelelo oluphantsi). Kwizicelo ezingaphantsi kwamanzi (umz., iipayipi ezingaphantsi kwamanzi), sebenzisa iimitha ezinereyithingi ye-IP68. Kwiindawo eziqhumayo (umz., iindawo zokucoca ioyile), khetha iimitha ezineziqinisekiso ze-ATEX okanye ze-IECEx kwiindawo ezinobungozi.
5. Ukuthintela ukuGxila koMbane kunye nokuphazamiseka
Iimitha ze-EM zinovelwano kukuphazamiseka kombane, nto leyo enokuphazamisa isignali kwaye inciphise ukuchaneka. Ukubeka umhlaba ngendlela efanelekileyo kubalulekile ukukhusela imitha kwingxolo yombane yangaphandle:
- Umhlaba ophantsi kwemitha: Qhagamshela isiphelo somhlaba semitha kwindawo ezinikeleyo, enganyangekiyo (≤10Ω). Musa ukwabelana ngomhlaba nezinye izixhobo (umz., iimoto, iimpompo), njengoko oku kunokubangela ingxolo. Kwimibhobho yeplastiki (engahambisi mbane), faka indandatho yomhlaba (isangqa sesinyithi esiqhotyoshelwe kumbhobho ongaphezulu nongaphantsi kwemitha) kwaye uyidibanise nomhlaba wemitha. Oku kuqinisekisa ukuba ulwelo lukwimeko efanayo yomhlaba njengemitha.
- Ulawulo lweentambo: Sebenzisa iintambo ezikhuselweyo ukuze udlulise amandla kunye nesignali (umz., iintambo ze-analog ze-4-20mA, iintambo zedijithali ze-RS485). Dlulisa iintambo kude nemigca ye-voltage ephezulu (umz., iintambo zamandla ze-380V) kunye nemithombo ye-electromagnetic (umz., ii-variable frequency drives, ii-motors) ukuze uphephe ukuphazamiseka. Gcina umgama omncinci wemitha e-1 phakathi kweentambo ze-EM meter kunye neentambo zengxolo ephezulu.
6. Ukufikeleleka koLondolozo kunye noLungiso
Iimitha ze-EM zifuna ukugcinwa rhoqo (umz., ukucocwa kwe-electrode, ukulinganiswa) ukuze kugcinwe ukuchaneka. Ukufaka imitha kwindawo engafikelelekiyo (umz., iindawo ezixineneyo zokukhasa, iisilingi eziphakamileyo) kwandisa ixesha kunye neendleko zokulungisa.
- Nika ukufikelela okucacileyo: Qinisekisa ukuba kukho ubuncinane imitha e-1 yendawo ejikeleze imitha ukuze iingcali zisebenze. Ukuba imitha ifakwe kwindawo ephakamileyo, sebenzisa amaqonga okanye iileli (ezineempawu zokhuseleko) ukuze ungene.
- Ukubekwa kwevalvu: Faka iivalvu zokwahlukanisa phezulu nasezantsi kwemitha. Ezi valve zivumela iingcali ukuba zivale ukuhamba kolwelo ukuze kulungiswe okanye kutshintshwe ngaphandle kokumisa yonke inkqubo yepayipi. Sebenzisa iivalvu ezinezibuko ezipheleleyo ukuze uthintele ukuthintela ukuhamba kolwelo xa luvuliwe.
- Izinto ekufuneka ziqwalaselwe xa kulungiswa: Khetha indawo evumela uqhagamshelo olulula kwizixhobo zokulinganisa (umz., imigangatho yokuhamba kwamanzi ephathekayo). Kwimibhobho emikhulu, qinisekisa ukuba kukho indawo yokuba izixhobo zokulinganisa zifakelwe okwethutyana.
Isiphelo
Ukufakwa ngokufanelekileyo kweemitha zokuhamba nge-electromagnetic linyathelo elibalulekileyo ekuqinisekiseni ukulinganiswa kokuhamba ngokuchanekileyo nangokuthembekileyo kwiinkqubo zemibhobho. Ngokujonga ubude obuthe tye bemibhobho, ukuhambelana kobungakanani, ukuzaliswa kolwelo, ukukhethwa kwezinto, ukumisa umhlaba, kunye nokufikeleleka, abaqhubi banokuphucula ukusebenza kwemitha kunye nobomi bayo. Ukutyeshela ezi zinto akupheleli nje ekukhokeleleni kwidatha engachanekanga (enokuthi ibeke emngciphekweni ulawulo lwenkqubo okanye ukuthotyelwa kwemithetho) kodwa kwandisa iindleko zokugcina kunye nexesha lokungasebenzi. Ukuzinika ixesha lokucwangcisa nokwenza ufakelo ngokuchanekileyo kuqinisekisa ukuba iimitha ze-EM zibonelela ngokuchanekileyo kunye nokuqina okufunekayo kwizicelo ezahlukeneyo zoshishino kunye noomasipala.
Ixesha leposi: Oktobha-11-2025