Koj paub, thaum tib neeg feem ntau xav txog qhov ntsuas kub, lawv tsom mus rau qhov ntsuas nws tus kheej - thermocouple lossis RTD. Tab sis nyob rau hauv lub ntiaj teb tiag tiag ntawm furnaces, molten hlau, thiab aggressive chemical txheej txheem, lub thermouple tiv thaiv tube yog dab tsi ua los yog rhuav tshem tag nrho koj qhov kev ntsuas. Nws yog thawj kab ntawm kev tiv thaiv, thiab hais ncaj ncees, qhov ntau ntawm cov phiaj xwm mus rau sab vim yog xaiv cov khoom raws li tus nqi ntau dua li qhov kev pabcuam tiag tiag. Kuv tau pom ntau tus qauv alumina raj tawg hauv thermal shock lossis corrode nyob rau hauv lub lis piam thaum xav tau ib yam dab tsi ntxiv. Nws tsis yog ib qho sheath xwb; nws yog ib qho tseem ceeb, engineered tivthaiv.
Kev xaiv cov khoom tsis yog ib qho kev ua haujlwm hauv Catalog
Xaiv cov khoom siv raj los ntawm cov ntaub ntawv yog ib daim ntawv qhia rau kev ua tsis tiav. Theoretical siab tshaj qhov ntsuas kub yog ib yam; kev ua tau zoo hauv ntiaj teb nrog thermal cycling, huab cua, thiab muaj peev xwm tsim kev tsim txom yog lwm qhov. Piv txwv li, peb ib zaug siv lub siab purity alumina raj nyob rau hauv lub steel billet reheat rauv. Ntawm daim ntawv, nws zoo meej rau 1200 ° C. Hauv kev muaj tiag, qhov qhib qhov rooj tsis tu ncua rau kev nkag mus rau billet ua rau lub voj voog ceev ceev. Hauv ib hlis, cov kab plaub hau tau tsim, ua rau kev nyeem ntawv tsis raug thiab qhov tshwm sim tsis ua haujlwm. Zaj lus qhia? Lub thermal shock kuj ntawm mullite los yog silicon carbide tej zaum yuav hu tau zoo dua, txawm tias qhov ntsuas kub tsis tu ncua qis dua me ntsis.
Qhov no yog qhov uas lub sij hawm ntev foundry thiab machining kev ua invaluable. Ib lub tuam txhab zoo li Qingdao Qiangsenyuan Technology Co., Ltd. (QSY), nrog nws 30-xyoo keeb kwm nyob rau hauv casting thiab machining tshwj xeeb alloys, nkag siab qhov no ntawm ib tug metallurgical theem. Lawv tsis yog muag ib lub raj xwb; lawv tab tom xav li cas a cobalt-raws li alloy kev tiv thaiv tube yuav coj tus cwj pwm nyob rau hauv cov huab cua sulfidizing ntawm petrochemical cracker, los yog li cas a Nickel-raws li alloy ua nyob rau hauv cov xwm txheej carburizing. Qhov kev paub zoo ntawm cov khoom siv coj cwj pwm nyob rau hauv kev ntxhov siab thiab cua sov yog dab tsi cais tus neeg muab khoom lag luam los ntawm tus khub daws teeb meem.
Lwm qhov kev nthuav dav uas feem ntau tsis saib xyuas yog qhov kawg kaw. Qhib-kawg, kaw-kawg, capped, lossis nrog lub thermowell built-in? Lub raj kaw kawg tiv thaiv lub sensor tab sis ntxiv me me lag. Hauv cov txheej txheem nrawm nrawm, qhov lag luam tseem ceeb. Peb tau sim ib lub thawv tuab-walled kaw-kawg Inconel 600 raj rau batch reactor kub tswj. Lub voj tswj tau dhau los ua qeeb vim tias lub thermal loj ntawm lub raj taub yog siab dhau. Hloov mus rau ib lub phab ntsa nyias nyias nrog lub kaw tab sis tapered taub daws nws. Nws yog cov feeb no, kev hloov kho ntawm tes uas cov ntaub ntawv tsis qhia koj.
Cov txheej txheem tsim khoom txhais tau tias muaj kev ntseeg siab
Koj tuaj yeem muaj qhov zoo tshaj plaws alloy specification, tab sis yog hais tias lub raj tsis zoo cam khwb cia los yog machined, nws yuav poob. Porosity nyob rau hauv ib tug cam khwb cia raj tiv thaiv yog ib tug tuag kab lus - nws ua ib txoj kev rau roj infiltration los yog ib tug taw tes ntawm cov yam ntxwv tsis muaj zog. Kuv nco qab ib pawg ntawm cam khwb cia stainless hlau raj uas ua tsis tau nyob rau hauv lub ntsev da dej. Qhov kev soj ntsuam tsis ua hauj lwm taw qhia rau micro-porosity nyob ze ntawm qhov chaw weld ntawm lub flange, tso cai rau ntsev nkag mus rau hauv thiab corrode los ntawm sab hauv tawm. Qhov kev ncaj ncees casting yog non-negotiable.
Qhov no yog vim li cas lub peev xwm tsim khoom tom qab tus neeg muag khoom yog qhov tseem ceeb. Ib lub tuam txhab tshwj xeeb hauv peev casting, zoo li QSY, tuaj yeem tsim cov raj tiv thaiv nrog cov geometries nyuaj-xav tias cov flanges sib xyaw ua ke, mounting lugs, lossis khoov txawv txawv rau kev tshem tawm-nrog rau qhov zoo tshaj plaws tiav thiab qhov tsis xws luag sab hauv. Rau kev yooj yim, ncaj tubes, CNC machining los ntawm cov khoom lag luam bar ua kom meej meej qhov ntev ntev, uas yog qhov tseem ceeb rau kev ua kom haum zoo nrog lub sensor thiab cov txheej txheem kev sib txuas. Kev xaiv ntawm casting thiab machining tsis yog hais txog tus nqi xwb; nws yog hais txog qhov yuav tsum tau geometry, khoom, thiab zaum kawg phab ntsa thickness sib xws.
Tom qab ntawd muaj qhov tiav. Lub tshuab ua haujlwm yuav zoo rau qee qhov kev siv, tab sis hauv lwm tus, hauv av lossis polished sab hauv tuaj yeem tiv thaiv cov khoom tsim thiab yooj yim sensor ntxig / tshem tawm. Rau qhov kub-kub alloys, txheej txheej oxide txheej uas tsim (cov nplai) tuaj yeem tiv thaiv, yog li qee zaum koj tsis xav kom nws ua haujlwm tom qab casting. Nws yog counterintuitive, tab sis qhov ntawd yog hom nuance koj kawm hauv pem teb, tsis yog hauv kev sib tham muag.
Kev sib koom ua ke thiab Kev Kho Mob Hauv Tsev
Txawm tias lub raj zoo tshaj plaws tuaj yeem ua rau muaj teeb meem yog tias kev sib koom ua ke tsis xav txog. Cov xov mounting lossis flange tus qauv yuav tsum phim cov khoom siv uas twb muaj lawm. Metric vs. NPT threads tau ua rau qeeb qeeb qeeb dua li kuv xav nco ntsoov. Qhov ntev yog lwm qhov pitfall classic. Nws yuav tsum tau ntev txaus kom ncav cuag lub ntsiab lus kub cheeb tsam tab sis tsis ntev npaum li ntawd nws vibrates ntau dhau los yog tau txais nyob rau hauv txoj kev ntawm agitators los yog lwm yam khoom siv.
Peb muaj ib rooj plaub nyob rau hauv lub cement kiln qhov chaw tiv thaiv tube, thaum lub suab zoo, tsuas yog ntev me ntsis thiab nruj. Lub kiln txoj kev sib hloov thiab qhov hnyav ntawm lub clinker buildup ua rau nws flex me ntsis ntawm lub hauv paus lub sij hawm, nws thiaj li qaug zog thiab tawg ntawm lub weld mus rau lub taub hau mounting. Txoj kev kho yog lub raj me me nrog lub caj dab beefier-ib qho kev hloov kho yooj yim uas tus thawj spec tau saib xyuas. Nws qhia tias lub raj tsis muaj nyob hauv kev sib cais; nws yog ib feem ntawm lub tshuab tshuab.
Lwm cov ntsiab lus tseem ceeb: hloov sensor. Koj puas tuaj yeem yooj yim rho tawm cov thermocouple ntawm lub raj yog tias nws ua tsis tau? Yog hais tias lub raj ntev thiab muaj ntau yam khoov, koj yuav xav tau ib lub sensor hloov tau los yog tus qauv tsim uas tso cai rau kom yooj yim rub tawm. Kuv tau siv sij hawm nyob rau hauv ib lub scaffold sim ntses tawm lub thermocouple daig vim lub raj sab hauv tau roughened los yog warped me ntsis dhau sij hawm. Tam sim no, peb feem ntau hais txog qhov loj me me sab hauv txoj kab uas hla los yog ib qho kev ua tiav hauv cov kav ntev ntev kom tsis txhob muaj qhov npau suav phem no.
Thaum Tshwj Xeeb Alloys tsuas yog teb
Rau qhov chaw raug txim ntau tshaj plaws - khib nyiab pov tseg, qee hom iav melting, kev sib cuag ncaj qha nrog molten aluminium los yog zinc - tus qauv stainless hlau lossis txawm tias muaj cov nickel alloys yuav tsis txiav nws. Qhov no yog lub realm ntawm tiag tshwj xeeb alloys. Xav cov ntaub ntawv zoo li Alloy 625, HK-40, lossis txawm platinum-rhodium. Lawv cov nqi yog siab, tab sis lawv lub neej nyob rau hauv tej yam kev mob corrosive / erosive tuaj yeem ua rau lawv qhov kev xaiv pheej yig tshaj plaws nyob rau lub sijhawm ntev.
Kev ua haujlwm nrog tus khub uas tau ntsib hauv cov ntaub ntawv no yog qhov tseem ceeb heev. Machining lossis casting cov alloys yuav tsum tau paub txog kev paub. Piv txwv li, cobalt-based alloys yog zoo kawg nkaus hnav-resistant tab sis tuaj yeem ua rau lub tshuab tsis muaj kev ntxhov siab lossis ua haujlwm hnyav. Ib tus neeg muag khoom nrog qhov tob CNC machining keeb kwm yav dhau rau cov ntaub ntawv zoo li no yuav muaj cov cuab yeej zoo, txau, nrawm, thiab cov txheej txheem txias los tsim ib feem uas khaws nws cov khoom siv hauv paus. QSY cov lus qhia meej txog kev ua haujlwm nrog cov tsev neeg hlau no qhia txog qib kev muaj peev xwm uas mus deb dhau ntawm kev tsim cov khoom siv raj.
Qhov kev txiav txim siab siv cov hlau no feem ntau yog los ntawm kev soj ntsuam tsis ua haujlwm. Peb hloov mus rau lub centrifugally cam khwb cia HK-40 raj rau lub reformer rauv tom qab ib tug qauv cam khwb cia raj raug mob hnyav carburization thiab embrittlement, tsis nyob rau hauv ib xyoos. Lub raj HK-40 tau siv sijhawm ntau rau kev sib tw. Tus nqi them ua ntej yog triple, tab sis tag nrho cov nqi hauv ib xyoos ua haujlwm tau qis dua, thiab kev ntseeg tau tiv thaiv kev kaw tsis tau npaj tseg. Qhov ntawd yog qhov kev suav tiag tiag.
Saib Dhau Lub Tube: Lub Rooj Sib Tham Ua tiav
Thaum kawg, nws yog ib qho tseem ceeb uas yuav tau xav txog lub raj tiv thaiv raws li ib feem ntawm kev sib dhos: lub raj nws tus kheej, kev hloov pauv lossis lub taub hau mounting (uas yog lub tsev txuas txuas), cov txheej txheem kev sib txuas (xov, flange, weld txiv mis), thiab qee zaum lub caj dab txuas ntxiv rau rwb thaiv tsev. Cov khoom no feem ntau yuav tsum tau ua los ntawm cov khoom sib txawv. Lub raj yuav yog ceramic, thaum lub flange yog hlau alloy sib xws nrog lub nkoj. Lawv koom li cas? Qhov no yog qhov tseem ceeb interface.
Hlau-rau-ceramic pob qij txha yog qhov nyuaj tshwj xeeb vim qhov sib txawv coefficients ntawm thermal expansion. Cov txheej txheem tshwj xeeb brazing lossis compression fittings yog siv. Kuv tau pom qhov ua tsis tiav qhov uas zoo li muaj zog brazed sib koom ua tsis tiav vim tias lub braze alloy tau tawm tsam los ntawm cov txheej txheem cua, ib yam dab tsi uas tsis tau txiav txim siab thaum tsim. Kev ncaj ncees ntawm tag nrho lub rooj sib txoos, feem ntau tsim los ntawm kev sib xyaw ua ke ntawm plhaub molding rau cov hlau qhov chaw thiab precision machining, txiav txim siab qhov system xau-tightness thiab mechanical stability.
Thaum kawg, qhia txog a Thermocouple tiv thaiv tube yog ib qho kev tawm dag zog hauv cov ntaub ntawv siv kev tshawb fawb thiab kev tsim kho tshuab. Nws yuav tsum nug tsis yog dab tsi yog qhov kub thiab txias? Tab sis dab tsi yog tag nrho cov dab neeg?—cua sov, thermal cycles, mechanical stress, corrosion, erosion, and care access. Nws yog ib qho ntawm cov khoom siv uas qhov kev xaiv pheej yig yuav luag ib txwm yog qhov kim tshaj plaws ntawm lub neej ntawm cov nroj tsuag. Lub hom phiaj yog kom tsis nco qab nws txawm nyob ntawd, vim tias yog tias koj niaj hnub xav txog koj lub raj tiv thaiv, nws feem ntau txhais tau tias nws tsis ua nws txoj haujlwm.
