Waya wolipirira ndi mawaya awiri okhala ndi insulating layer yomwe ili ndi mtengo wofanana ndi mphamvu ya thermoelectromotive ya thermocouple yofananira pa kutentha kwina (0~100°C). Zolakwa chifukwa cha kusintha kwa kutentha pa mphambano. Mkonzi wotsatirawa akudziwitsani za waya wa chiwongola dzanja cha thermocouple, ntchito ya waya wa chiwongola dzanja cha thermocouple ndi chiyani, komanso gulu la waya wolipirira thermocouple.
1. Kodi waya wamalipiro a thermocouple ndi chiyani?
Waya wolipirira wamba amafunikira ma elekitirodi abwino ndi oyipa kuti akhale ofanana ndi zida zabwino ndi zoyipa za thermocouple. Ma thermocouples amtundu wa K ndi nickel-cadmium (positive) ndi nickel-silicon (negative), kotero molingana ndi muyezo, mawaya a nickel-cadmium-nickel-silicon ayenera kusankhidwa.
2. Kodi ntchito ya waya wolipira thermocouple ndi yotani
Ndiko kukulitsa ma elekitirodi otentha, ndiko kuti, kutha kozizira kwa thermocouple yam'manja, ndikulumikizana ndi chida chowonetsera kuti apange njira yoyezera kutentha. Mofananamo, tsatirani muyezo wadziko lonse wa IEC 584-3 "Thermocouple Part 3 - Compensation Wire". Zogulitsazo zimagwiritsidwa ntchito kwambiri pazida zosiyanasiyana zoyezera kutentha, ndipo zakhala zikugwiritsidwa ntchito kwambiri pamagetsi a nyukiliya, mafuta, mankhwala, zitsulo, mphamvu zamagetsi ndi madipatimenti ena.
3. Gulu la mawaya amalipiro a thermocouple
M'malo mwake, imagawidwa kukhala mtundu wowonjezera ndi mtundu wamalipiro. Zomwe zimapangidwa mwadzina za waya wa alloy wamtundu wokulirapo ndizofanana ndi zomwe zimafanana ndi thermocouple, kotero mphamvu ya thermoelectric imakhalanso yofanana. Imayimiridwa ndi "X" muchitsanzo, ndipo mawonekedwe amtundu wa waya wa alloy amtundu wa chipukuta misozi ndi ofanana. Ndizosiyana ndi thermocouple yofananira, koma mu kutentha kwake kwa ntchito, mphamvu ya thermoelectric ili pafupi ndi mtengo wamtengo wapatali wa mphamvu ya thermoelectric ya thermocouple yofananira, yomwe imayimiridwa ndi "C" mu chitsanzo.
Kulondola kwamalipiro kumagawidwa m'makalasi wamba komanso giredi yolondola. Cholakwikacho pambuyo polipira giredi yolondola nthawi zambiri chimakhala theka la giredi wamba, yomwe nthawi zambiri imagwiritsidwa ntchito m'malo omwe ali ndi zofunikira zoyezera kwambiri. Mwachitsanzo, kwa mawaya amalipiro a manambala omaliza maphunziro a S ndi R, kulolerana kwa kalasi yolondola ndi ± 2.5 ° C, ndipo kulekerera kwa kalasi wamba ndi ± 5.0 ° C; kwa mawaya amalipiro a manambala omaliza maphunziro a K ndi N, kulolerana kwa kalasi yolondola ndi ± 1.5 ° C, kulolerana kwa kalasi wamba ndi ± 2.5 ℃. Muchitsanzo, kalasi wamba sichimalembedwa, ndipo kalasi yolondola imawonjezedwa ndi "S".
Kuchokera pa kutentha kogwira ntchito, amagawidwa m'magulu ogwiritsidwa ntchito komanso osagwiritsa ntchito kutentha. Kutentha kogwira ntchito kwanthawi zonse ndi 0 ~ 100 °C (ochepa ndi 0 ~ 70 °C);
Kuphatikiza apo, waya wa waya amatha kugawidwa kukhala mawaya amtundu umodzi komanso mawaya ambiri (waya wofewa), ndipo amatha kugawidwa kukhala mawaya wamba komanso otetezedwa ngati ali ndi gawo lotchingira, komanso palinso mawaya olipira. mabwalo otetezeka omwe amaperekedwa ku zochitika zosaphulika.