1. Mechanism ntawm tus kheej-detonation ntawm tempered iav
Cov iav ib feem ntawm iav insulator yog tempered iav, uas yog tus cwj pwm los ntawm compressive kev nyuaj siab ntawm qhov chaw thiab tensile kev nyuaj siab nyob rau hauv, raws li qhia nyob rau hauv daim duab.
Kev ntxhov siab stratification ntawm tempered iav
Qhov laj thawj ntawm iav kev ntxhov siab yog qhov hloov ntawm qhov kub thiab txias thaum lub sij hawm ua iav. Thaum lub iav tau muab tso rau hauv qhov kub thiab txias (760 ~ 780 degree), cov txheej txheej txheej txias txias zog contraction, tab sis qhov kub thiab txias sab hauv yog tseem siab nyob rau hauv lub expansion lub xeev, ua rau lub nto txheej contraction blocked, tawm compressive kev nyuaj siab nyob rau hauv lub nto. txheej; Tom qab ntawd qhov kub thiab txias sab hauv yuav txo qis thiab qhov kev cog lus pib, tab sis lub sij hawm no cov txheej saum npoo tau hardened, uas ua rau sab hauv contraction yog thaiv thiab tensile stress yog generated. Ob qhov kev ntxhov siab no yog qhov kev ntxhov siab tas mus li uas tau muab faib ua ib feem ntawm lub khob kom txog thaum lub khob txias tag thiab qhov kub thiab txias gradient ploj mus.
Thaum qhov sib npaug ntawm compressive stress thiab tensile stress nyob rau hauv lub iav qhov chaw ntawm iav insulators puas lawm, cov kab nrib pleb yuav raug generated sai sai nyob rau hauv qhov kev txiav txim ntawm kev ntxhov siab, thiab ces cov iav qhov chaw yuav crushed, uas yog, nws tus kheej-detonation.
2. Ua rau thiab cov yam ntxwv ntawm tus kheej detonation
Cov laj thawj rau tus kheej detonation ntawm iav insulators tuaj yeem muab faib ua cov khoom lag luam zoo thiab cov laj thawj ntawm kev ua haujlwm sab nraud, thiab feem ntau muaj ob qho laj thawj hauv qhov tseeb.
(1) Yog vim li cas rau cov khoom zoo
Nws yog feem ntau cov iav insulators muaj impurities hauv iav, feem ntau yog NIS hais. Lub sijhawm hloov pauv ntawm NIS tsis tiav nyob rau hauv cov txheej txheem ntawm melting thiab annealing ntawm iav qhov chaw. Tom qab cov insulator tau muab tso rau hauv kev ua haujlwm, nws ntseeg tau tias qhov kev hloov pauv theem thiab nthuav dav tshwm sim maj mam, ua rau tawg hauv lub khob. Thaum txoj kab uas hla ntawm particle impurities tsawg dua li ib qho nqi, nws yuav tsis tuaj yeem raug tshem tawm los ntawm kub thiab txias poob siab, ua rau nws tus kheej-detonation tus nqi ntawm insulator hauv kev ua haujlwm. Thaum cov impurity hais nyob rau hauv lub internal tensile stress txheej ntawm iav, qhov tshwm sim ntawm tus kheej-detonation yog siab dua. Vim tias iav nws tus kheej yog cov khoom siv tawv tawv, nws tuaj yeem tiv taus siab tab sis tsis tensile, yog li feem ntau ntawm cov iav tawg yog tshwm sim los ntawm tensile stress.
Nta:
Tus kheej-detonation tshwm sim los ntawm lub internal impurity hais ntawm ib tug yog siab nyob rau hauv thawj peb lub xyoos ntawm kev ua hauj lwm, thiab yuav maj mam poob tom qab ntawd, uas yog ib qho tseem ceeb txoj cai rau txiav txim qhov ua rau ntawm tus kheej-detonation.
b txoj hlua hluav taws xob muaj qhov ua tau zoo ntawm tus kheej-detonation ntawm ntau txoj haujlwm;
(2) Sab nraud ua rau
Feem ntau muaj kuab paug thiab kub hloov pauv. Nyob rau hauv ib txhij ua ntawm fouling, noo noo thiab hluav taws xob teb, cov xau tam sim no nyob rau saum npoo ntawm insulator yog loj heev, uas ua rau ib feem ntawm txoj siv tawv qhuav. Thaum huab cua tawg tshwm sim nyob rau hauv txoj siv qhuav, lub arc generated yuav erode lub iav kaus tiab. Thaum qhov corrosion tob tob, nws yuav ua rau nws tus kheej detonation. Yog hais tias lub insulator raug ntaus los ntawm xob laim thaum lub sij hawm cov txheej txheem saum toj no, qhov tshwm sim ntawm tus kheej-detonation ntawm iav insulator uas tau eroded los ntawm arc yuav zoo heev. Kev fouling ntau dhau yog ib qho tseem ceeb. Tej zaum nws yuav yog tias cov ntsev ntawj ntom heev dhau lawm, lossis nws yuav yog tias muaj ntau cov hlau nyob hauv cov pa phem.
Nta:
① Kev tshem tawm tus kheej yuav tsis pom tseeb ob peb xyoos ua ntej kev ua haujlwm, thiab nws yuav tshwm sim nyob rau lub sijhawm tom qab ob peb xyoos ntawm kev ua haujlwm (kev hloov pauv loj hauv cov pa phem hauv zos ua rau muaj kuab paug ntau dhau);
② Qhov tshwm sim ntawm tus kheej-detonation ntawm qhov siab voltage kawg thiab qis voltage kawg ntawm insulator hlua b yog ntau tshaj qhov nyob rau hauv nruab nrab (qhov high voltage kawg thiab low voltage kawg muaj zog hluav taws xob teb, thiab lub zos creepage tshwm sim nyob rau hauv lub steel pin ntawm insulator thawj zaug thaum muaj kuab paug hnyav heev);
③ Muaj kev puas tsuaj rau cov hlau ko taw ntawm lub rwb thaiv tsev uas tsis yog nws tus kheej tawg nyob rau hauv tib lub pej thuam (lub zos arc tshwm sim los ntawm kev puas tsuaj ntau dhau rau cov iav qhov chaw ze ntawm lub ko taw steel), thiab muaj cov kab nrib pleb zoo hauv lub kaus;
3. Kev tiv thaiv
(1) Kev tswj xyuas kev sib txuas hauv network, los ntawm kev kuaj xyuas qhov kev puas tsuaj ntawm cov khoom siv hluav taws xob, kev ua haujlwm siab yoj cuam tshuam los tswj qhov zoo ntawm cov iav insulators rau hauv lub network.
(2) Composite insulators yog siv rau hauv cov pa phem hnyav. Nyob rau hauv cov ntaub ntawv ntawm concentrated self-detonation tshwm sim los ntawm cov pa phem heev, puas insulators siv tau es tsis txhob iav insulators.
(3) Txhim khu kev soj ntsuam, nyob rau hauv huab cua phem xws li xob laim yuav tsum tau raws sij hawm rau cov kab sib txuas tshwj xeeb saib xyuas.
(4) Ua tib zoo saib xyuas kev thauj mus los, kev tsim kho vaj tse, kev kho tsheb thauj mus los ntawm cov iav insulator, yuav tsum muaj kev tiv thaiv los ntawm cov khoom siv tiv thaiv, kom tsis txhob puas.