Nkag siab txog kev faib cov gantry cranes yog qhov tsim nyog rau kev xaiv thiab yuav khoom cranes. Ntau hom cranes kuj muaj cov kev faib tawm sib txawv. Hauv qab no, tsab xov xwm no yuav qhia txog cov yam ntxwv ntawm ntau hom gantry cranes kom ntxaws rau cov neeg siv khoom siv thaum xaiv yuav lub crane.
Raws li cov qauv tsim ntawm lub crane ncej
Raws li cov qauv ntawm lub qhov rooj ncej, nws tuaj yeem muab faib ua gantry crane thiab cantilever gantry crane.
Gantry cranesmuab faib ua:
1. Tag nrho cov gantry crane: lub ntsiab nqaj tsis muaj overhang, thiab lub trolley txav nyob rau hauv lub ntsiab span.
2. Semi-gantry crane: Raws li nyob rau ntawm qhov chaw tsim kho vaj tse, qhov siab ntawm cov outriggers txawv.
Cantilever gantry cranes tau muab faib ua:
1. Ob chav cantilever gantry crane: ib qho ntawm cov qauv siv ntau tshaj plaws, nws cov qauv kev ntxhov siab thiab siv tau zoo ntawm qhov chaw yog qhov tsim nyog.
2. Ib leeg cantilever gantry crane: Vim qhov chaw txwv, cov qauv no feem ntau yog xaiv.
Kev faib tawm raws li cov duab thiab hom ntawm lub ntsiab nqaj ntawm lub gantry crane:
1. Ua tiav kev faib tawm ntawm ib lub ntsiab girder gantry cranes
Ib leeg-girder gantry crane muaj cov qauv yooj yim, yooj yim rau kev tsim thiab nruab, thiab muaj qhov loj me. Feem ntau ntawm nws cov kab teeb tseem ceeb yog inclined rail box thav duab. Piv nrog rau ob-girder gantry crane, tag nrho cov tawv nqaij tsis muaj zog. Yog li ntawd, thaum nqa qhov hnyav Q≤50 tons, ncua S≤35m.
Ib leeg girder gantry craneob txhais ceg muaj nyob rau hauv L-hom thiab C-hom. Tus qauv L-shaped yog ib qho yooj yim rau nruab, muaj zog tiv thaiv zoo, thiab muaj qhov loj me, tab sis qhov chaw rau nqa cov khoom los ntawm ob txhais ceg yog me me. C-puab ob txhais ceg yog slanted los yog khoov los muab qhov chaw kab rov tav loj dua rau cov khoom thauj kom dhau los ntawm ob txhais ceg.
2. Ua tiav kev faib tawm ntawm ob lub ntsiab girder gantry cranes
Ob chav girder gantry cranesmuaj zog nqa peev xwm, loj spans, zoo zuag qhia tag nrho stability, thiab ntau ntau yam, tab sis lawv tus kheej loj yog loj dua ib leeg-girder gantry cranes nrog tib lub peev xwm nqa, thiab tus nqi kuj yog siab dua.
Raws li cov qauv sib txawv ntawm lub ntsiab nqaj, nws tuaj yeem muab faib ua ob hom: lub thawv beam thiab truss. Tam sim no, lub thawv-hom qauv yog feem ntau siv.
Kev faib tawm raws li lub ntsiab nqaj qauv ntawm gantry crane:
1. Truss girder gantry crane
Lub welded qauv ntawm lub kaum sab xis steel los yog I-beam muaj qhov zoo ntawm tus nqi qis, lub teeb yuag thiab zoo cua tsis kam.
Txawm li cas los xij, vim muaj coob tus ntawm cov ntsiab lus vuam, lub truss nws tus kheej muaj qhov tsis xws luag. Lub truss beam kuj muaj qhov tsis zoo xws li loj deflection, tsis tshua muaj zog, tsis tshua muaj kev ntseeg siab, thiab yuav tsum tau nrhiav kom pom cov ntsiab lus vuam. Nws yog tsim rau cov chaw uas tsis muaj kev ruaj ntseg yuav tsum tau thiab me me nqa hnyav.
2. Lub thawv girder gantry crane
Cov hlau phaj yog welded rau hauv lub thawv-zoo li tus qauv, uas muaj cov yam ntxwv ntawm kev nyab xeeb thiab siab tawv. Feem ntau siv rau loj tonnage thiab loj tonnage gantry cranes. Lub ntsiab beam txais lub thawv beam qauv. Box beams kuj muaj qhov tsis zoo ntawm tus nqi siab, qhov hnyav tuag, thiab cua tsis zoo.
3. Honeycomb beam gantry crane
Feem ntau hu ua "isosceles daim duab peb sab honeycomb beam", qhov kawg ntawm lub ntsej muag ntawm lub ntsiab nqaj yog daim duab peb sab, thiab muaj cov honeycomb qhov ntawm ob sab ntawm oblique plab, sab sauv thiab qis chords. Cellular beams nqus cov yam ntxwv ntawm truss beams thiab box beams, thiab muaj zog ntau dua, me deflection thiab ntau dua kev ntseeg siab tshaj truss beams.
Txawm li cas los xij, vim qhov vuam ntawm cov hlau phaj, qhov hnyav ntawm tus kheej thiab tus nqi yog me ntsis siab dua li cov kab hluav taws xob truss. Haum rau kev siv ntau zaus lossis hnyav nqa qhov chaw lossis qhov chaw nqaj. Vim tias hom kab no yog cov khoom lag luam, muaj tsawg dua cov neeg tsim khoom.
