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Thermocouple - yog dab tsi? Thermocouple rau ib tug roj boiler

Thermocouple - yog dab tsi? Npaum li cas yog twb tseeb los ntawm lub npe. Tus ntaus ntawv yog ib tug transducer siv rau ntsuas qhov kub ntawm cov ua hauj lwm nruab nrab. Structurally, nws muaj ob tug conductors ntawm txawv co welded los yog soldered mus rau txhua lwm yam nyob rau ib kawg. Tus ntaus ntawv yog yooj yim heev, tab sis qhov zoo tshaj yuav ua rau nws tsis yooj yim.

Yuav ua li cas lub thermocouple

Ob tug txawv neeg xyuas pib txuas mus rau hauv ib lub nplhaib. Thaum lub kub yog txawv cov pob qij txha, ib tug tej zaum txawv tshwm sim nruab nrab ntawm lawv vim lub thermoelectric nyhuv.

thermocouple hauv paus ntsiab lus yog raws li nram no. Cov nruab nrab uas yog tshuaj, kub hlws ris tso, thiab cov dawb xaus yog kev cob cog rua rau lub xab ntsuas. Qhov ntau dua qhov txawv ntawm lub zog ntawm cov conductors thiab lub cua sov differential thoob plaws qhov xaus ntawm lub saum toj no electromotive quab yuam nyob rau hauv ib tug Circuit Court (thermal emf).

Cov kev sib raug zoo ntawm cov voltage thiab qhov kub thiab txias mas nws txawv ntawm txawv hlau. Cov los yog lwm yam hom sensors tsim rau nws thermal yog hom twg. Lawv muaj peev xwm kuj yuav sib txawv kuj yuav corrosion thiab corrosive ib puag ncig.

lub sij hawm

Rau cov teeb meem-dawb lub lag luam ntawm cua kub cov khoom siv thermocouple. Yuav ua li cas yog nws rau ib tug roj boiler? Thiab yuav ua li cas yog nws ua hauj lwm? Xav yuav tsum tau muab ntau. Ua ntej ntawm tag nrho cov, nws muab tsis siv neeg kaw-off cov khoom thaum lub sij hawm tas ntawm cov roj boiler. Lub thermocouple rau roj cookers kuj tsim nyog los tsim hluav taws xob tiv cav tseb roj sai li sai tau raws li nws pib mus rau pub. Nyob rau hauv tas li ntawd kom ua tau tswj kev khiav dej num ntawm tus ntaus ntawv yuav siv tau raws li ib tug kub sensor.

meej mom

Xav txog dab tsi thermocouple muaj yam ntxwv:

  • siab precision ntsuas;

  • dav xab ntau;

  • tau kev kho ib tug kub;

  • yooj yim qauv;

  • muaj, uas tsis muaj nqi thiab durability thermoelectrodes;

  • installation thiab yooj yim txij nkawm.

shortcomings

Nyob rau hauv thermocouple muaj downsides:

  • heev uas tsis muaj rhiab heev;

  • zoo kuj;

  • nonlinearity ntawm qhov kub thiab txias dependence ntawm thermal electromotive quab yuam;

  • qhov yuav tsum tau rau ib tug dag tswj qhov kub thiab txias ntawm ib qho ntawm lub xaus.

Thermo emf electrode yeej tseem zoo nyob rau hauv lub xub ntiag ntawm impurities nyob rau hauv lub hlau, tus neeg kho tshuab thiab thermal kho mob. Yuav kom nce nws siv ntawm ntau yam thermocouples thermopile.

Thaj chaw ntawm Industrial thermocouple ntaus ntawv

Thermal sensors no yog ua los feem ntau ntawm cov noble hlau. Los ntawm cov sab nraud ib puag ncig ntawm kaw raj nrog ib tug flange, uas ua hauj lwm pab rau mount tus ntaus ntawv. Tiv haum tiv thaiv lub conductors ntawm tus ntawm txhoj puab heev tej kev kawm thiab yog tsis muaj ib leeg. Cov khoom yog ib tug pa (600 ° C) los yog stainless steel (mus txog 1100 ° C) steel. Thermoelectrodes cais los ntawm txhua lwm yam asbestos iav raj los yog tej hub hlaws dai.

Yog hais tias lub davhlau ya nyob twg yog nyob ze, lub thermocouple nyob ntawm tej yog kev cob cog rua rau nws ncaj nraim tsis ntxiv connectors. Thaum Tso lub ntsuas ntaus ntawv ntawm ib tug deb, thaum siv rau hauv lub saw free xaus ntawm lub thermocouple yog muab tso rau hauv ib tug molded lub taub hau, uas txuas mus rau tus tiv thaiv raj. Tsis pub dhau dag terminals cov txheej txheem ntawm nyob rau hauv ib tug iav raws li nyiaj rau txuas nyob ntawm tej ua los ntawm cov tib cov ntaub ntawv raws li lub thermoelectrodes tab sis tsis muaj tseeb thiab nruj me ntsis tswj yam ntxwv. Lawv muaj ib tug txo nqi thiab ntau dua thickness. Lawv nkag mus rau hauv lub taub hau los ntawm lub lub tes tsho nrog asbestos gasket. Ceramics ua hauj lwm pab rau equalize lub kub nyob rau hauv tag nrho cov pob qij txha. Sab saum toj tiv thaiv cover yog threaded nrog ib tug hermetic foob.

Nyob rau hauv hlau crimp Terminations tsis tau ntsia, raws li lawv tej zaum yuav thuam cov neeg ntawm lub readings. Hlau ua nplhaib thiab clamp nws nyob rau hauv lub ntsia hlau.

Hloov ntawm kub hloov nyob rau hauv cov terminals yuav ua hluav taws xob ntaus ntawv, uas tsub kom cov neeg ntawm kev ntsuas.

Yuav ua li cas yuav ua tau ib tug thermocouple. Nqe thiab Feature

Ib tug thermocouple yuav welded ob nyob ntawm tej ntawm txawv hlau. Yog siv interchangeably nyob rau hauv lub lag luam cov ntaub ntawv uas muaj peev xwm ntawm tiv siab kub, check thiab muaj thermo-electromotive quab yuam. Nws tseem muaj lwm zoo li qub kiag li lawm uas muaj precision thiab tib operating hauv paus ntsiab lus, tab sis thermocouple yooj yim thiab pheej yig dua apparatus.

Lub electrodes siv mos annealed hlau ntawm tshwj xeeb alloys. Nws ua hauj lwm nyob rau hauv lub siab tshaj plaws kub ntawm txog 1000 degrees. Lub alloys muaj ruaj khov thiab siab thermo-electromotive quab yuam qhov tseem ceeb.

sensors nrog ob tug electrodes, nyob rau lub cathode yog ib tug npib tsib xee-chromium hlau (Chromel) Feem ntau, thiab lub anode - lwm hlau, xws li alumel (thermocouple TCA). Qhov yooj yim kev twb kev txuas yog ua rau nws nrog ib tug nkhaus.

Txhua yam ntawm sensor txawv nyob rau hauv kev ua hauj lwm ntau yam kub, nyiaj ntawm generated emf, ua hauj txhua yam thiab tshuaj nres, durability thiab interchangeability.

Nws yog tsuas tsim nyog los yuav xws li, uas sib tau yuav tsum tau tsis. Qhov no siv tshwj xeeb tshaj yog rau lub tshav kub tsis kam, los yog yuav sai sai no muaj los mus hloov lub ntaus ntawv.

Thermocouple rau Boiler tua nyob rau hauv txoj kev sib txawv nyob ntawm seb tus qauv. mus pab cov nqi yog kwv yees li nyob rau tib theem. Nyob rau nruab nrab, lawv tau dab tsi rau 500-600 rubles. Nyob rau hauv cov lag luam tawm tseem muaj sensors nrog ntxiv hluav taws xob converter, uas ua rau ib tug kev them nyiaj ntsuas readings. Nws yog kev ncaj qha mus rau hauv lub thermocouple lub taub hau. Sensor nqi yog siab dua, tab sis nws tsis yuav tsum tau nyiaj nyob ntawm tej. K thermocouple lub taub hau yuav tsum txuas nrog rau cov pa tooj liab hlau.

Dua li coj cov khoom rau tej qauv, specifications uas haum ua ke. Universal ntaus durability tsis txawv.

hom sensors

  1. Ntaus K npib tsib xee-chromium (TXA thermocouple) los yog npib tsib xee-alumel (HA) muaj cov nram qab no cov khoom: tsis muaj nqi, durability, neeg yog tsis ntau tshaj li 0.4%, kev ntsuas ntau yam los ntawm -270 rau 1269 degrees. Tsim los rau cov lag luam nyob rau hauv ib tug oxidizing thiab inert atmospheres.

  2. L - chromel-kopel (TCA), pheej yig thermocouple nrog ib tug sab sauv txwv ntawm 600 degrees.

  3. J - hlau-constantan. Sensor ranked thib ob nyob rau hauv koob meej, lub ntau yam yog los ntawm -210 mus 760 degrees, tsawg check, resistant rau oxidation.

  4. E - ib tug npib tsib xee-chromium los yog npib tsib xee-constantan nrog ntau dua cov neeg thiab teeb liab tus nqi, lub sab sauv txwv ntawm kev ntsuas tsis pub tshaj 870 degrees.

  5. Sensors ua los ntawm zoo zoo nkauj tshooj khiav lag luam ntawm ib tug ntau dua kub, tab sis muaj ib tug nqi, thiab yog li ntawd feem ntau siv nyob rau hauv kev lag luam.

Embodiments thermocouple kev twb kev txuas

Ntawm xab txoj kev feem ntau grounded sensors. Lawv hlau xaus yog welded mus rau hauv ib chav tsev xwb, culminating nyob rau hauv ib tug tshwj xeeb kev sojntsuam. Lub tes tsho yog nyob rau hauv kev sib cuag nrog tus tiv thaiv txheej plhaub, uas lub tshav kub yog kis sai heev, thiab cov thermocouple yog tsawg inertia. Cov neeg ntawm lub readings yog heev cuam tshuam los ntawm hluav taws xob cuam tshuam. Raws li txoj ntsiab cai no ua hauj lwm thermocouple rau ib tug roj boiler. Lub ntsuas ntaus ntawv li no yuav tsum tsis txhob yuav grounded li los ntawm lub hauv av tej zaum yuav muaj ntxiv circuits, uas qhia kev ua yuam kev nyob rau hauv lub readings.

Yog hais tias lub hlws ris yog tsis nyob rau hauv kev sib cuag nrog ib tug tiv plhaub, ces qhov no tsim yog hu ua grounding. Txawm tias muaj tseeb hais tias nyob rau hauv rooj plaub no tus ceev sensor decreases, nws yog tsawg raug rau yuam kev hluav taws xob cuam tshuam.

Ua hauj lwm hlws ris kuj tau ncaj qha mus muab tso rau hauv tus txheej txheem, tab sis qhov no txoj kev thiaj li cov kev pab cuam lub neej ntawm tus dais vim corrosion. Nyob rau hauv lub qhuav ntawm xws li ib thermocouple yog siv tsis tshua, thiab tsev neeg cov khoom siv yuav tsum tau pom qhov txhia chaw.

Ntsuas qhov kub thiab txias nyob rau hauv ob peb lub ntsiab lus thov multizone thermocouple. kev twb kev txuas tswvyim nws yog nyob rau hauv tib lub hauv paus ntsiab lus, tsuas yog tus ntaus kev cob cog rau ob peb sensors nyob rau hauv ob los yog ntau tshaj qhov chaw.

Yuav ua li cas yog ib thermocouple nrog ib tug roj boiler

Thermocouple - yog dab tsi? Rau cov neeg siv, txhua yam yuav tseeb, thaum muaj disruptions ntawm cov roj cov khoom. Ua hauj lwm thermocouple hlws ris nyob rau hauv lub boiler yog rhuab los ntawm tus tsav nplaim taws. Lub Circuit Court yog ntxias thermal emf sib npaug zos rau 20-25 MV, uas tus nqi yog txaus los mus khiav lub solenoid valve. Qhov no yuav qhib cov roj mov mus rau lub cua sov boiler. Ignition burner yeej ib txwm ua hauj lwm thaum lub sij hawm boiler ua hauj lwm. Los ntawm nws cov ntsiab burner yog Cov nroj cig cuag, ib tug cua kub dej. Lub thermocouple rau roj cookers kuj tsim nyog muab rau hluav taws xob tiv cav tseb burners.

Tsis tas li ntawd, ib co phaj muab nrog ib tug tiv thaiv nyob rau hauv cov ntaub ntawv ntawm failures nyob rau hauv lub mov thaum cov roj yog poob nyob rau hauv lub network, thiab ces nkag dua.

Nyob rau hauv combustion roj nplaim taws nyob rau hauv lub boiler chaw adhesions thermoelectrodes nws yog rhuab, thiab yog li cov roj tus me nyuam. Tom qab cov nplaim taws yog extinguished, lub thermocouple kub hlws ris cools, thiab nws tsis tu tsis tseg rau muab tam sim no. Thaum zoo li no yog hloov tawm solenoid valve, roj yog kaw tawm.

Check ntawm serviceability

Thermocouple rau ib tug roj boiler soj ntsuam los ntawm ib tug solenoid valve, uas yog muag nyob rau hauv tshwj xeeb khw muag khoom noj. By xaus ntawm lub winding valve yuav tsum tau soldered ob saj zawg zog nyob ntawm tej nrog clamps "khej", thiab ces txuas mus rau lub terminals ntawm lub thermocouple. Thaum rhuab, lub kub hlws ris ntawm lub thermocouple lawm nyob rau hauv cov nplaim taws ntawm ib tug roj burner los yog suppositories valve yuav tsum ua los ntawm cov generated tam sim no. Tus ntaus ntawv yog zoo nyob heev thiab unpretentious.

Xyuas cov efficiency ntawm lub thermocouple yog tseem uas siv millivoltmeter. Lub voltage nyob rau hauv nws free xaus, yuav tsum muaj tsawg tshaj 25 MV.

Ib tug yog vim li cas rau lub shutdown yog tus txhaum tsav thermocouple. Tsis kawm tej zaum yuav tshwm sim los ntawm lub tsim ntawm txawv teb chaws rau lwm nyob rau hauv qhov chaw ntawm lub spikes. Nws txiav ntwav txhuam ntoo "nulevkoy". Tsuas yog yuav tsum tshem tawm cov quav hniav. Txwv tsis pub nws yuav raug rhuav tshem los ntawm spikes.

Thaum so ntawm qhov thermocouple nyob ntawm tej yuav kev cob cog rua ntawm ib tug luv luv piece ntawm ib tug pa tooj liab hlau. Nws yog ib qho tseem ceeb mus rau qhov chaw rau cov neeg yog nyob rau hauv tib lub kub.

Yog hais tias thermocouple burnt boiler, nws yuav tsum tau hloov. Nws yog ua tau los txuam rau qhov xaus ntawm lub nyob ntawm tej los sib ntswg lawv ua ke thiab txuas mus rau lub terminals ntawm lub roj teeb. Yog li ntawd nws yog tsim nyog los xaiv txoj cai lub sij hawm mus cuag, kom tau ib tug zoo ntsia hlau loj. Nyob rau hauv tas li ntawd, nws yog tsim nyog los ua tau li ntawd nyob rau hauv lub thermocouple nyob ntawm tej tsis ntaus nrog ib tug hlau roj teeb davhlau ya nyob twg. Qhov chaw sib ntswg tus vuam txoj kev no feem ntau yog raus nyob rau hauv ib tug graphite hmoov. Yog hais tias koj sau Latro ntaus ntawv, koj yuav tau kho qhov tam sim no, thiab cov kev sib koom yuav zoo. Tag nrho cov kev ntsuas no muaj ib ntus, ntawm tus yooj yim roj thermocouple yuav tsum tau hloov los ntawm ib tug tshiab.

xaus

Thermocouple - yog dab tsi? Nws yog ib tug yooj yim thermoelectric converter. Kev ntseeg tau thiab durability ntawm tus dais ua nws ib tug indispensable lub cuab tam rau ib tug roj boiler tawm nyob rau hauv cov ntaub ntawv ntawm thaum muaj xwm ceev.

Thermocouples no kuj siv rau hluav taws xob tiv cav tseb nyob rau hauv roj qhovcub thiab raws li kub sensors.

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