Txo Atmosphere Adaptability: Qhov zoo ntawm Pin-Type J Thermocouple vs K-Type Thermocouple
Kev ntsuas kub tsis ruaj khov thiab lub neej luv luv ntawm lub tshuab nqus tsev thiab txo qhov chaw ib puag ncig muaj teeb meem ntev thermal tswj kev kho cua sov thiab cov khoom siv tshuaj. Cov neeg siv feem ntau ib txwm xaiv K-hom thermocouples rau siab - cov khoom siv kub, tab sis tsis quav ntsej qhov tshwj xeeb ib puag ncig adaptability zoo ntawm tus pin- hom J thermocouple hauv kev txo qis kev ua haujlwm. Hauv qis-oxygen, hydrogen-muaj thiab carbon-monoxide- nplua nuj txo cov huab cua, K-hom thermocouples yog nquag ua rau ntsuab rot tsis ua hauj lwm thiab drift loj, thaum tus pin-hom J thermocouple tswj cov thermoelectric kev ua haujlwm ruaj khov thiab dhau los ua qhov kev xaiv zoo tshaj plaws rau qhov tshwj xeeb scenarios.
Cov khoom siv tseem ceeb ntawm tus pin-hom J thermocouple hauv kev txo cov huab cua los ntawm cov yam ntxwv ntawm hlau-constantan alloy. Cov hlau tsis zoo tsis tu ncua muaj cov tshuaj lom neeg muaj zog heev hauv kev txo qis ib puag ncig, thiab cov hlau zoo hlau yuav tsis tsim cov oxidation thiab tivthaiv nag lossis daus nyob rau hauv qis - cov pa oxygen. Hauv qhov sib piv, cov nickel-chromium alloy ntawm K- hom thermocouple yog qhov rhiab heev rau qis- oxygen txo cov cua. Chromium cov ntsiab lus raug xaiv oxidation nyob rau hauv oxygen- ib puag ncig tsis txaus, tsim cov kab hauv cov kab mob hauv lub cev, ua rau tsis muaj peev xwm hloov tau qhov kub thiab txias, feem ntau hu ua ntsuab rot tsis ua haujlwm.
Lub tshuab nqus tsev vacuum thiab cov txheej txheem tiv thaiv roj inert yog cov xwm txheej tsim nyog rau tus pin-hom J thermocouple. Hauv cov khoom siv kho cua sov kaw kaw, ntev -lub sij hawm qis- oxygen ib puag ncig kom zam qhov siab - kub oxidation tsis xws luag ntawm J- hom hlau hlau. Lub sensor tuaj yeem ua haujlwm ruaj khov ntawm 700℃rau lub sijhawm ntev uas yuav luag tsis muaj drift. Raws li cov ntaub ntawv ua haujlwm ntawm lub tshuab nqus tsev, kev pabcuam lub neej ntawm tus pin-hom J thermocouple hauv lub tshuab nqus tsev yog ntau dua ob npaug ntawm K-hom thermocouples, thiab qhov ntsuas qhov tseeb ruaj khov yog qhov zoo dua.
Hauv kev lag luam carbonization thiab hydrogen txo cov txheej txheem, cov xwm txheej zoo ntawm J- hom pin thermocouples yog qhov tseem ceeb dua. Hydrogen-muaj cov pa roj tsawg yuav ua rau cov qauv hlau ntawm K-hom thermocouples sai, ua rau tsis ua haujlwm sai hauv ntau pua teev. Pin-hom J thermocouple tiv thaiv hydrogen corrosion thiab qis- oxygen txo kev yaig zoo, tswj xyuas qhov ntsuas kub tsis tu ncua thiab ruaj khov thiab txo qis zaus hloov pauv lub sijhawm poob.
Kev sib piv ntawm J-hom thiab K- hom thermocouples nyob rau hauv ib puag ncig tshwj xeeb yog qhia hauv cov lus hauv qab no:
|
Atmosphere Ib puag ncig |
Pin-Type J Thermocouple Performance |
Pin -Type K Thermocouple Performance |
Optimal Sensor Xaiv |
|---|---|---|---|
|
Ib txwm oxidizing cua |
Ruaj khov hauv qab 540 degree, drifted saum 540 degree |
Zoo heev puv - ntau yam stability |
K- hom rau siab temp, J- hom rau qis - nruab nrab temp |
|
Nqus & Inert Gas |
Ultra- ruaj khov, tsis muaj teeb meem |
Me ntsis ntsuab rot drift dhau sijhawm |
Pin-Type J Thermocouple |
|
Hydrogen Reduction Atmosphere |
Muaj zog corrosion kuj, kev pab lub neej ntev |
Alloy erosion hnyav & ceev tsis ua hauj lwm |
Pin-Type J Thermocouple |
|
Carbon Monoxide Mixed Atmosphere |
Ruaj khov thermoelectric tso zis |
Pom tseeb teeb liab drift & tsawg raug |
Pin-Type J Thermocouple |
Raws li kev lag luam scenario txheeb cais, ntau dua 60% ntawm cov thermocouple tsis ua haujlwm hauv cov khoom siv kho cua sov los ntawm qhov tsis raug K- hom kev xaiv sensor. Hloov nrog tus pin sib tw-hom J thermocouple, cov cuab yeej ntsuas kub ntsuas kev ruaj ntseg thiab lub neej ntawm lub sensor tau txais txiaj ntsig zoo dua, thiab kev ua haujlwm zoo thiab kev saib xyuas tus nqi raug txo los ntawm ntau dua 40%.
Kev xaiv sensor yuav tsum ua raws li -qhov chaw huab cua yam ntxwv raws li tus qauv txiav txim siab, tsis yog qhov kub thiab txias xwb. Kev ntsuas kub ntsuas kev lag luam muaj peev xwm ua tau raws li J-hom thiab K- hom thermocouples raws li qhov chaw sib txawv roj, zam qhov xwm txheej tsis sib haum xeeb yuav ua rau muaj kev pheej hmoo.
