1. Kev xaiv ntawm Portal Crane
Feem ntau hais lus, yog tias lub peev xwm nqa tau qis dua 50t, qhov ncua sij hawm yog nyob rau hauv 35m, thiab tsis muaj qhov tshwj xeeb yuav tsum tau siv, yuav tsum xaiv ib hom nqaj loj. Yog tias koj xav tau lub qhov rooj loj loj, kev ua haujlwm siab, lossis yog tias koj feem ntau nqa cov khoom hnyav lossis ntev, koj yuav tsum xaiv ob-girder Portal Crane.
2. Ntev thiab cantilever ntev
Qhov ntev ntawm Portal Crane yog qhov tseem ceeb cuam tshuam rau qhov zoo ntawm crane nws tus kheej. Thaum xaiv, qhov ncua sij hawm yuav tsum raug txo kom tsawg li ntau tau ntawm qhov chaw ua tau raws li cov khoom siv thiab ua raws li cov qauv span series.
3. Kev Txiav Txim Cov Ntsiab Cai ntawm Wheelbase
(a) Nws tuaj yeem ua tau raws li qhov yuav tsum tau muaj kev ruaj ntseg ntawm lub mast raws cov kev taw qhia ntawm crane khiav;
(b) Tag nrho qhov ntev ntawm cov khoom thauj yuav tsum muaj peev xwm dhau los ntawm lub tiaj tus steel ncej ntawm cov outriggers smoothly;
(c) Ua tib zoo ua kom lub log puag B thiab ncua S muaj qee qhov kev sib raug zoo. Feem ntau, lub log puag B=(1/4-1/6)S.
4. Txiav txim qhov kev ncua deb ntawm gantry cranes
Thaum lub sijhawm ua haujlwm, qee qhov chaw yuav tsum tau sab laug ntawm qhov ntev ntawm Portal Crane thiab cov khoom thauj thiab thauj cov tsheb thauj mus los hauv lub vaj kom yooj yim rau kev thauj khoom thiab thauj khoom. Thaum thauj thiab tshem tawm cov tsheb thauj khoom dav dav nyob rau hauv qhov ncua sij hawm, lawv yuav tsum nyob deb ntawm ntau tshaj {{0}}.7m ntawm lub qhov rooj ob txhais ceg. Thaum lub tshuab kis tsis ua haujlwm, yuav tsum muaj qhov nrug deb tshaj li 0.5m ntawm lub tsheb thauj khoom. Thaum cov khoom dhau los ntawm lub qhov rooj ob txhais ceg, yuav tsum muaj kev ncua deb ntawm ntau tshaj 0.5m.
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