Lub neej ntev npaum li cas ntawm lub flange txav tau -mounted junction box type thermocouple

Lub neej ntev ntawm lub flange txav tau- mounted junction box type thermocouple yog qhov tseem ceeb rau kev ua kom ntseeg tau ntev - lub sijhawm ua haujlwm ruaj khov ntawm cov tshuab ntsuas kub. Vim lawv qhov yooj yim ntawm disassembly thiab txij nkawm, cov thermocouples no tau siv dav hauv qhov cub ntsuas, cov khoom siv txawb, lossis ntsuas qhov ntsuas kub uas yuav tsum tau ua kom nquag plias. Txawm li cas los xij, qhov tseeb vim tias lawv cov qauv kev sib txuas tsis zoo, nyob rau hauv kev cuam tshuam ntawm kev co, thermal cycling, thiab seal aging, lawv lub neej kev pab cuam feem ntau yog nyob nruab nrab ntawm 2 thiab 4 xyoo. Raws li kev ua haujlwm zoo tshaj plaws thiab nrog kev saib xyuas kom raug, qee qhov siab - kev teeb tsa zoo tuaj yeem txuas mus rau ntau dua 5 xyoos.

 

I. Cov yam tseem ceeb cuam tshuam rau lub neej

Kev ruaj ntseg ntawm cov qauv kev sib txuas

Lub flange txav tau tso siab rau bolts rau kev sib khi. Ntev -lub sij hawm raug rau cov khoom vibration los yog thermal expansion thiab contraction tuaj yeem ua rau xoob yooj yim, ua rau kev sib cuag tsis zoo lossis foob tsis ua haujlwm. Piv nrog rau cov flanges ruaj khov, nws cov kev ntseeg tau qis dua, uas yog qhov laj thawj tseem ceeb rau nws txoj kev ua neej tsawg.

Sealing Performance thiab Environmental Intrusion Risk

Yog hais tias lub hlws ris box sealing nplhaib muaj hnub nyoog los yog raug ntsia tsis zoo, noo noo thiab plua plav tuaj yeem nkag tau yooj yim, ua rau oxidation ntawm cov terminals, txo cov rwb thaiv tsev, los yog luv luv Circuit Court. Tshwj xeeb tshaj yog nyob rau hauv siab - av noo thiab plua plav ib puag ncig, lub rwb thaiv tsev kuj yuav poob qis dua tus nqi tseem ceeb hauv 1-2 xyoos.

Kev Ua Haujlwm Kub thiab Thermocouple Degradation

Operating for extended periods in high-temperature environments (such as K-type thermocouples >900℃) tuaj yeem ua rau "ntsuab corrosion" - xaiv oxidation ntawm npib tsib xee-chromium zoo electrode, ua rau thermoelectric muaj peev xwm drift. Cov khoom no degradation yog irreversible thiab cuam tshuam ncaj qha rau kev ntsuas qhov tseeb thiab kev pab lub neej.

Cov khoom siv tiv thaiv tube thiab cov txheej txheem tsim khoom

Lub raj tiv thaiv yog thawj kab ntawm kev tiv thaiv kub kub, corrosion, thiab hnav. Siv cov kav hlau stainless zoo tib yam hauv qhov chaw corrosive heev yuav ua rau perforation tsis pub dhau 2 xyoos; thaum siv hnav- cov alloys resistant lossis siab -kub hnav- tiv taus cov thermocouples nrog hlau- cov txheej txheem ceramic tuaj yeem ua rau lub neej nce 1-5 zaug.

 

II. Siv Lifespan Raws li cov kev ua haujlwm zoo

Daim ntawv thov Scenario	Hom Lifespan	Kev piav qhia
Test Furnace (Kev ua haujlwm tsis tu ncua)	3-5 xyoos	Qhov kub thiab txias, kev saib xyuas tsis tu ncua, lub neej ntev dua
Cov cuab yeej saib xyuas txawb	2-3 xyoos	Nquag disassembly thiab sib dhos, siab vibration, kev sib txuas yooj yim loosen
Qhov kub thiab txias ib puag ncig	1.5-2.5 xyoos	Seals yooj yim poob, rwb thaiv tsev degrades sai
Muaj zog Corrosive nruab nrab	1-2 xyoos	Kev tiv thaiv lub raj thiab lub thawv sib txuas tau yooj yim corroded
Circulating Fluidized txaj Boiler	8-12 lub hlis	Ib puag ncig hnav heev, yuav tsum tau hloov tsis tu ncua

 

III. Kev ntsuas tseem ceeb txhawm rau txuas lub neej ua haujlwm

Txhim kho kev sib txuas kev ntseeg tau zoo: Siv lub torque wrench kom sib npaug ntawm cov flange bolts thaum lub sij hawm txhua qhov kev teeb tsa, thiab ntxiv cov tshuaj tiv thaiv - loosening washers los yog siv los tiv thaiv - loosening adhesive yog tias tsim nyog los tiv thaiv loosening vim kev co.

Txhim kho qib kev tiv thaiv kev sib khi: Xaiv cov thawv sib txuas nrog IP67 lossis siab dua tiv thaiv kev ntsuas, nruab nrog siab - kub resistant silicone sealing rings, thiab xyuas kom meej tias lub qhov hluav taws xob qhov hluav taws xob tau ntsia rau pem hauv ntej los tiv thaiv cov dej nag rov qab.

Txhim kho cov txheej txheem thaiv: Siv "crimp + weld" dual kho txoj kev kom tsis txhob cia siab rau ntawm cov ntsia hlau kom nruj cov xov hlau; siv cov tshuaj tiv thaiv - oxidation conductive muab tshuaj txhuam rau cov hlua txuas kom qeeb cov txheej txheem oxidation.

Kev saib xyuas tsis tu ncua thiab tshuaj xyuas:

Txheeb xyuas qhov xwm txheej ntawm lub nplhaib sealing thiab ntsia liaj qhov rooj nruj txhua lub hlis twg;

Ntxuav cov hlua txuas thiab ntsuas qhov tiv thaiv kev tiv thaiv txhua rau lub hlis (yuav tsum tsawg dua lossis sib npaug rau 0.1Ω);

Test the insulation resistance annually (between the thermocouple and the protection tube should be >100MΩ).

Tsim cov ntaub ntawv cov khoom siv: Sau lub sijhawm teeb tsa, tus naj npawb ntawm kev tshem tawm thiab kev sib dhos, calibration keeb kwm, thiab kev ua txhaum. Ua ntej hloov cov ntsiab lus uas tau siv rau ntau tshaj 3 xyoos los yog nquag ua rau lub tswb nrov, hloov ntawm "kev kho txhaum" mus rau "kev saib xyuas kwv yees".