1. Dab tsi yog cov txheej txheem rau kev hloov cov hlua khi hlua khi hauv cov kab tsheb ciav hlau tsis khoom?
Hloov cov hlua khi hlua khi rau hauv cov kab tsis khoom yuav tsum tau ua tib zoo npaj kom txo qis kev cuam tshuam kev pabcuam. Feem ntau, kev ua haujlwm tau teem caij thaum so - cov sij hawm siab tshaj lossis hmo ntuj. Ua ntej, cov tsheb ciav hlau qub yog unfastened los ntawm cov neeg pw tsaug zog siv cov cuab yeej tshwj xeeb los tshem cov clips lossis bolts. Cov tshuab hnyav, xws li tsheb ciav hlau cranes, nqa thiab tshem tawm cov tsheb ciav hlau qub. Cov tsheb ciav hlau tshiab yog tom qab ntawd thauj mus rau qhov chaw, ua raws, thiab ruaj ntseg rau cov neeg pw tsaug zog nrog cov fasteners tshiab. Yog tias siv cov hlua txuas txuas ntxiv (CWR), cov ntu tshiab yog welded ua ke kom tshem tawm cov pob qij txha. Thaum kawg, txoj kev taug qab tau raug tshuaj xyuas rau kev sib tw thiab ntsuas, thiab txhua qhov kev hloov kho tau ua ua ntej cov tsheb ciav hlau rov pib ua haujlwm.
2. Yuav ua li cas steel rails daws qhov kev ntxhov siab los ntawm kev nres tsheb ciav hlau tam sim ntawd?
Sudden braking tsim kev sib txhuam hnyav thiab kev ntxhov siab rau sab nraud ntawm lub tsheb ciav hlau log thiab steel rails. Lub taub hau rail, hardened los ntawm kev kho cua sov, resists puas los ntawm lub braking quab yuam. Txoj kev tsheb ciav hlau tag nrho cov qauv-xws li lub vev xaib thiab lub hauv paus- faib cov khoom thauj tam sim ntawd rau cov neeg pw tsaug zog thiab taug kev, tiv thaiv qhov chaw deformation. Hauv qhov siab - nres nres (xws li, nyob ze cov chaw nres tsheb), cov tsheb ciav hlau yuav ua los ntawm ntau dua - cov pa roj carbon steel los yog muaj lub taub hau ntxiv los tiv thaiv kev ntxhov siab. Tsis tas li ntawd, cov khau nres thiab cov khoom siv log yog tsim los ua kom cov tsheb ciav hlau hnyav, txo qis hnav ntau dhau thaum nres nres.
3. Qhov txawv ntawm kub- dov thiab txias - dov steel rails yog dab tsi?
Kub-rolled rails yog zoo li tus dov molten steel ntawm qhov kub thiab txias (tshaj 1,000 degree), uas tso cai rau kom yooj yim tsim rau hauv qhov xav tau rail profile. Txoj kev no yog tus nqi- siv tau rau kev tsim khoom loj thiab ua rau cov hlua nrog cov khoom siv zoo. Txias -rolled rails, los ntawm qhov sib piv, yog ua tiav ntawm chav tsev kub tom qab kub dov, uas ua rau cov hlau ntxiv dag zog los ntawm kev ua haujlwm hardening. Lawv muaj ib tug smoother nto thiab nruj me ntsis tolerances tab sis yog ntau kim thiab tsawg dua, siv feem ntau rau tshwj xeeb daim ntaub ntawv uas yuav tsum tau precision, xws li nyob rau hauv ib co kev lag luam lem.
4. Yuav ua li cas steel rails nyob rau hauv freight yards txawv ntawm cov nyob rau hauv mainline railways?
Cov yards thauj khoom thauj tau nquag, qis- nrawm nrawm ntawm cov tsheb hnyav, yog li lawv cov tsheb ciav hlau tseem ceeb tshaj qhov ua tau zoo tshaj qhov nrawm- cuam tshuam txog smoothness. Lawv feem ntau siv cov hlua hnyav (piv txwv li, 60 kg / m lossis ntau dua) los tiv thaiv kev thauj khoom tas li thiab tshem tawm. Rails nyob rau hauv yards tej zaum yuav muaj cov pob qij txha ntxiv kom haum raws li cov kev hloov kho tshiab, tsis zoo li cov kab tseem ceeb uas nyiam CWR. Tsis tas li ntawd, cov vaj tsev rails muaj feem cuam tshuam los ntawm shunting, yog li lawv yuav muaj cov taub hau tuab dua los yog cov hlua khi ntxiv. Mainline rails, los ntawm qhov sib txawv, tsom rau qhov ncaj, weld zoo, thiab tsis kam rau siab -ceev hnav, nrog cov qauv nruj dua.
5. Lub luag haujlwm ntawm txoj kev tsheb ciav hlau ua si hauv lub log -rail kev sib tshuam?
Lub tsheb ciav hlau profile-cov duab ntawm lub taub hau tsheb ciav hlau- ncaj qha cuam tshuam li cas cov log sib cuag nrog txoj kev tsheb ciav hlau. Ib qhov zoo-tsim profile kom paub meej txawm tias qhov hnyav faib, txo kev ntxhov siab ntawm ob qho tib si. Piv txwv li, "UIC 60" profile, feem ntau nyob rau hauv cov teb chaws Europe, phim cov qauv log profiles kom txo cov suab nrov thiab kev co. Nyob rau hauv nkhaus, rails yuav muaj ib tug me ntsis inclined lub taub hau los counteract lateral zog ntawm lub log, tiv thaiv derailment. Sij hawm dhau mus, hnav hloov pauv qhov profile, uas yog vim li cas kev sib tsoo tsheb ciav hlau rov qab zoo li qub kom muaj kev sib raug zoo.