Dab tsi yog "tus lej kawm tiav" ntawm cov thermocouples thiab ntsuas ntsuas kub txhais tau li cas?
Cov lej kawm tiav ntawm cov thermocouples feem ntau suav nrog S, R, B, N, K, E, J, T thiab lwm yam. Ntawm lawv, S, R, thiab B belongs rau noble hlau thermocouples, thiab N, K, E, J, thiab T yog cov pheej yig hlau thermocouples.
Tus lej S kawm tiav yog tus cwj pwm los ntawm kev ua haujlwm zoo los tiv thaiv oxidation, thiab tsim nyog rau kev siv txuas ntxiv hauv oxidizing thiab inert cua. Kev siv lub sij hawm ntev yog 1400 degree C, thiab siv lub sij hawm luv luv yog 1600 degree C. Ntawm tag nrho cov thermocouples, tus lej S kawm tiav muaj qib siab tshaj plaws thiab feem ntau yog siv los ua tus qauv thermocouple;
Piv nrog rau tus lej S kawm tiav, lub thermal electromotive quab yuam ntawm R kawm tiav yog li 15 feem pua loj dua, thiab lwm yam kev ua yeeb yam yuav luag zoo ib yam;
Lub thermal electromotive quab yuam ntawm B kawm tiav tus lej yog qhov tsawg heev ntawm chav tsev kub, yog li feem ntau tsis tas yuav them nyiaj xaim thaum ntsuas. Nws siv sijhawm ntev kub yog 1600 degree thiab luv luv 1800 degree. Nws tuaj yeem siv rau hauv oxidizing lossis nruab nrab cua, thiab tuaj yeem siv rau hauv lub tshuab nqus tsev rau lub sijhawm luv.
N kawm tiav yog tus cwj pwm los ntawm qhov muaj zog kub oxidation tsis kam ntawm 1300 degree, kev ruaj ntseg mus sij hawm ntev ntawm thermoelectromotive quab yuam thiab zoo rov ua dua ntawm lub sij hawm luv luv thermal, zoo nuclear hluav taws xob tsis kam thiab kub tsis kam, thiab tuaj yeem hloov qee qhov S kawm tiav thermocouple;
Tus lej K kawm tiav yog tus cwj pwm los ntawm kev ua haujlwm zoo los tiv thaiv oxidation, thiab nws yog qhov tsim nyog rau kev siv txuas ntxiv hauv oxidizing thiab inert cua. Kev siv lub sij hawm ntev yog 1000 degree C, thiab siv lub sij hawm luv luv yog 1200 ° C. Qhov siv dav tshaj plaws ntawm tag nrho cov thermocouples;
Tus yam ntxwv ntawm E kawm tiav tus lej yog tias ntawm cov thermocouples feem ntau siv, nws cov thermal electromotive quab yuam yog qhov loj tshaj plaws, uas yog, qhov rhiab heev yog qhov siab tshaj. Nws yuav tsum tau siv tsis tu ncua nyob rau hauv oxidizing thiab inert cua, thiab kev khiav hauj lwm kub yog 0-800 degree ;
Tus yam ntxwv ntawm J kawm tiav tus lej yog tias nws tuaj yeem siv tau rau hauv ob qho tib si oxidizing huab cua (qhov txwv siab tshaj ntawm kev ua haujlwm kub yog 750 degree), thiab nws kuj tuaj yeem siv los txo qhov cua (sab saum toj txwv ntawm kev ua haujlwm kub yog 950 degree), thiab nws yog resistant H2 thiab CO gas corrosion, thiab feem ntau yog siv nyob rau hauv cov roj refining thiab tshuaj lom neeg kev lag luam;
Tus lej T kawm tiav yog tus cwj pwm los ntawm qib siab tshaj plaws ntawm kev nyab xeeb ntawm txhua lub hauv paus hlau thermocouples, thiab feem ntau yog siv los ntsuas kub hauv qab 300 degree.
