Yuav ua li cas Humidity thiab Temperature Cycling Accelerate Thermocouple Internal Insulation Failure

Hloov kub thiab av noo caij tsheb kauj vab yog ib qho kev ntxhov siab ib puag ncig uas ua rau muaj kev puas tsuaj loj rau magnesium oxide rwb thaiv tsev hauv armored thermocouples. Qhov no yog ib qho tseem ceeb ntawm kev laus uas yooj yim neglected nyob rau hauv kev sib piv nrog ib tug kub kub los yog ib qho av noo puas. Lub voj voog hloov pauv ntawm qhov txias txias-kub thiab qhuav- ntub dej tsis tu ncua ua rau cov dej vapor hauv cov ntaub qhwv, uas maj mam decomposes cov hmoov rwb thaiv tsev, txo cov rwb thaiv tsev tiv thaiv, thiab induces luv luv - Circuit Court txhaum. Tsab ntawv xov xwm no piav qhia txog cov txheej txheem ntawm kev puas tsuaj thiab tsom rau kev tiv thaiv kev ua haujlwm kub kub ua haujlwm nrog qhov ntsuas kub thiab av noo tseem ceeb.

Kauj Ruam 1: Cov cua kub cua sov theem, cov cua kub sab hauv thermal nthuav tawm ib feem ntawm cov huab cua los ntawm lub qhov hluav taws xob qhov hluav taws xob, thaum cov roj hluav taws xob hluav taws xob nkag mus rau hauv lub plhaub sab hauv. High kub acid vapors condense nyob rau saum npoo ntawm magnesium oxide rwb thaiv tsev hais nyob rau hauv thiaj li yuav tsim me me conductive ntsev impurities. Nyob rau theem no lub insulating kuj yog marginally txo nrog tsis muaj cov cim qhia ntawm malfunction.

Theem 2: Cov huab cua sab hauv shrinks nyob rau hauv qhov txias cia ntawm pwm kaw, thiab cov huab cua sab nraud nyob rau hauv lub rhiav yog nqus rov qab mus rau hauv lub sheath los ntawm cov hlau qhov hluav taws xob sealing qhov sib txawv. Dej vapor reacts nrog acid ntsev impurities khi rau cov hmoov rwb thaiv tsev thiab tsim cov tshuaj electrolyte conductive. Lub rwb thaiv tsev tsis kam ntawm qhov zoo thiab qhov tsis zoo ntawm cov hlau tsis zoo yog txo qis heev. Tus maub los qhia qhov tsis zoo qis - qhov kub thiab txias luv - lub tswb nrov ntawm lub sijhawm, uas yuav ploj mus tom qab rov ua kom sov thiab evaporating noo noo, ua rau cov neeg ua haujlwm tu cov neeg ua haujlwm yuam kev raws li cov teeb liab cuam tshuam.

Kauj Ruam 3: Sib sau ua ke ntawm cov khoom siv hluav taws xob electrolyte los ntawm kev rov ua kom txias - kub caij tsheb kauj vab. Tom qab kaum tawm cua sov- cua txias mus, cov electrolyte residue hardens ntawm rwb thaiv tsev hais nyob rau hauv thiaj li yuav tsim kom muaj ib tug mus tas li conductive raws, thiab cov rwb thaiv tsev kuj poob mus rau tsawg tshaj li 300MΩ rau ib lub sij hawm ntev. Tam sim no, cov thermocouple yuav ua rau lub sijhawm luv luv - Circuit Court txhaum thaum cua sov, ua rau thaj chaw cua sov tso tawm tag nrho lub zog, ua rau kub khiav overheating thiab yas carbonization. Yog hais tias corrosion ua rau micro-perforations ntawm lub sheath, tus nqi ntawm nkag mus ntawm noo noo thiab acid gasses yuav nce ntau tshaj 3 zaug thiab lub rwb thaiv tsev yuav tsis nyob rau hauv 1-2 lub hlis.

1) Ib puag ncig kev cob qhia tseem ceeb uas ua rau muaj kev puas tsuaj ntawm qhov kub thiab txias - cov av noo caij tsheb kauj vab: • Coastal txhaj molding rhiav nrog huab cua siab thoob plaws hauv lub xyoo; • Rhiav nrog pwm dej- cov kav dej txias tau teem ze ze ntawm cov pwm khiav kub, ua kom muaj dej vapor ntau; • Kev cob qhia nyob rau lub caij ntuj nag uas muaj cua tsis zoo; • Cov pwm uas nquag pib thiab nres ntau lawm txhua hnub, ua rau ntau yam khaub thuas - kub kub txhua qhov ua haujlwm. Tsawg-tus nqi generic thermocouples nrog ib zaug - txheej nyias silicone sealing ntawm lub qhov hluav taws xob hlau yog tshwj xeeb tshaj yog raug rau qhov kev puas tsuaj sib xyaw, qhov siab - tus qauv ob- txheej ntim cov thermocouples tuaj yeem thaiv ntau dua 80% ntawm cov vapor infiltration.

Ntau-qib kev tiv thaiv kev daws teeb meem rau maj mam tawg tawg.

1. Thermocouple qib xaiv qhov tseem ceeb. Rau cov kab ntau lawm nrog cov av noo siab thiab nquag pib thiab nres, xav txog cov khoom uas muaj ob npaug - txheej siab - kub silicone sealing ntawm lub qhov hluav taws xob thiab Inconel anti- corrosion sheath. Tsis txhob pheej yig ib leeg - foob 304 stainless hlau sheath sensors.

2. Kev tswj ntawm qhov chaw ua haujlwm: kev teeb tsa ntawm cov dehumidifiers kom ntseeg tau tias cov av noo ntawm 40% -65% RH; tshav kub rwb thaiv tsev baffles cais pwm txias dej pipelines kom txo tau dej vapor volatilization nyob ib ncig ntawm lub pwm; ntxiv dag zog rau rhiav qhov cua kom raws sij hawm tso kua qaub yas volatile gas

3. Kev ua kom zoo ntawm cov txheej txheem ua haujlwm Txo qis pwm pib thiab kaw. Yog tias lub sijhawm kaw ntau dua 30 feeb, txo qhov kub khiav kub kom txuag tau qhov kub thiab txias kom txo qis thermal expansion thiab contraction voj voog ntawm lub thermocouple sheath. Nqus evaporation ntawm sab hauv seem ya raws thaum lub sij hawm segmented uas tsis muaj kub theem cua sov tom qab ncua sij hawm kaw thiab txias ua ntej nkag mus rau formal ntau lawm kub.

4. Cov khoom tshiab tsis tu ncua: kev saib xyuas txhua hli ntawm cov thermocouple, kev ntsuas kev tiv thaiv hluav taws xob siv lub megohmmeter, yog tias tus nqi tiv thaiv tsawg dua 500MΩ, ntxuav thiab qhuav cov thermocouple kom tshem tawm cov dej hauv sab hauv. Yog tias tus nqi tiv thaiv tsis tuaj yeem rov qab los tom qab ziab, hloov cov thermocouple tam sim ntawd.

5. Kev tiv thaiv cov khoom seem cia: Nws raug nquahu kom khaws cov thermocouples standby hauv cov thawv ntim cov ntaub ntawv pov thawj nrog cov desiccant los tiv thaiv kev nqus dej ua ntej kev teeb tsa.