Gantry crane yog tus choj-hom crane uas nws tus choj tau txais kev txhawb nqa hauv av los ntawm kev tawm ntawm ob sab. Structurely, nws muaj ib tug mast, ib tug trolley kev khiav hauj lwm mechanism, nqa trolley thiab hluav taws xob qhov chaw. Qee qhov gantry cranes tsuas yog muaj qhov tawm ntawm ib sab, thiab sab nraud yog txhawb nqa ntawm lub Hoobkas lub tsev lossis lub trestle, uas yog hu uasemi-gantry crane. Lub gantry crane yog tsim los ntawm tus choj saum toj kawg nkaus (nrog rau lub ntsiab nqaj thiab qhov kawg beam), outriggers, qis nqaj thiab lwm yam. Txhawm rau nthuav dav lub crane kev khiav hauj lwm ntau yam, lub ntsiab nqaj tuaj yeem ncav cuag lub outriggers mus rau ib los yog ob sab los tsim ib lub cantilever. Lub lifting trolley nrog lub boom kuj tseem siv tau los nthuav cov crane kev khiav hauj lwm ntau yam los ntawm kev sib tw thiab kev sib hloov ntawm lub boom.
1. Daim ntawv faib
Gantry cranestuaj yeem raug cais raws li cov qauv ntawm lub qhov rooj ncej, daim ntawv ntawm lub ntsiab nqaj, cov qauv ntawm lub ntsiab nqaj, thiab daim ntawv siv.
a. Qhov rooj ncej qauv
1. Tag nrho cov gantry crane: lub ntsiab nqaj tsis muaj overhang, thiab lub trolley txav nyob rau hauv lub ntsiab ncua sij hawm;
2. Semi-gantry crane: Lub outriggers muaj qhov sib txawv qhov siab, uas tuaj yeem txiav txim siab raws li qhov xav tau ntawm kev tsim vaj tsev hauv tsev.
b. Cantilever gantry crane
1. Ob chav cantilever gantry crane: Cov qauv siv ntau tshaj plaws, qhov kev ntxhov siab ntawm cov qauv thiab kev siv tau zoo ntawm qhov chaw yog qhov tsim nyog.
2. Ib leeg cantilever gantry crane: Daim ntawv qauv no feem ntau raug xaiv vim qhov chaw txwv.
c. Main beam daim ntawv
1. Ib lub ntsiab beam
Ib lub ntsiab girder gantry crane muaj cov qauv yooj yim, yooj yim rau kev tsim thiab nruab, thiab muaj qhov loj me. Lub ntsiab girder feem ntau yog deflection lub thawv ncej qauv. Piv nrog rau ob lub ntsiab girder gantry crane, lub zuag qhia tag nrho yog tsis muaj zog. Yog li, daim ntawv no tuaj yeem siv tau thaum lub peev xwm nqa Q≤50t thiab ncua S≤35m. Ib leeg girder gantry crane ob txhais ceg muaj nyob rau hauv L-hom thiab C-hom. L-hom yog ib qho yooj yim los tsim thiab nruab, muaj kev ntxhov siab zoo, thiab muaj qhov loj me. Txawm li cas los xij, qhov chaw rau nqa cov khoom kom dhau los ntawm ob txhais ceg yog qhov me me. C-shaped ob txhais ceg yog tsim nyob rau hauv ib qho inclined los yog nkhaus zoo los tsim ib tug loj lateral qhov chaw kom cov khoom yuav kis tau los ntawm ob txhais ceg smoothly.
2. Ob lub ntsiab nqaj
Ob chav lub ntsiab girder gantry cranes muaj zog load-bearing muaj peev xwm, loj spans, zoo zuag qhia tag nrho stability, thiab ntau yam. Txawm li cas los xij, piv nrog tib lub ntsiab girder gantry cranes nrog tib lub peev xwm nqa, lawv tus kheej loj dua thiab tus nqi 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. Feem ntau, lub thawv-zoo li tus qauv yog siv.
d. Main nqaj qauv
1.Txoj kab hluav taws xob
Cov qauv txheej txheem welded los ntawm lub kaum sab xis steel lossis I-nqaj muaj qhov zoo ntawm tus nqi qis, lub teeb yuag thiab zoo cua tsis kam. Txawm li cas los xij, vim muaj cov ntsiab lus vuam ntau thiab qhov tsis xws ntawm lub truss nws tus kheej, lub truss beam kuj muaj qhov tsis zoo xws li loj deflection, tsis tshua muaj zog, kuj tsis tshua muaj kev ntseeg siab, thiab yuav tsum tau tshawb xyuas cov ntsiab lus vuam. Nws yog tsim rau cov chaw uas muaj kev nyab xeeb qis dua thiab muaj peev xwm nqa me me.
2.Box beam
Cov hlau phaj yog welded rau hauv lub thawv qauv, uas muaj cov yam ntxwv ntawm kev nyab xeeb thiab siab tawv. Feem ntau siv rau loj-tonnage thiab ultra-loj-tonnage gantry cranes. Raws li pom hauv daim duab ntawm sab xis, MGhz1200 muaj peev xwm nqa tau ntawm 1,200 tons. Nws yog qhov loj tshaj plaws gantry crane nyob hauv Suav teb. Lub ntsiab nqaj adopts lub thawv girder qauv. Box beams kuj muaj qhov tsis zoo ntawm tus nqi siab, hnyav hnyav, thiab cua tsis zoo.
3.Npaj nplaim
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, muaj honeycomb qhov ntawm oblique webs ntawm ob sab, thiab muaj chords nyob rau sab sauv thiab qis. Honeycomb beams nqus cov yam ntxwv ntawm truss beams thiab lub thawv beams. Piv nrog truss beams, lawv muaj zog dua, me deflection, thiab kev ntseeg siab dua. Txawm li cas los xij, vim yog siv cov hlau phaj vuam, qhov hnyav ntawm tus kheej thiab tus nqi yog me ntsis siab dua li ntawm cov kab hluav taws xob truss. Nws yog qhov tsim nyog rau qhov chaw lossis qhov chaw nqaj nrog kev siv ntau zaus lossis hnyav nqa lub peev xwm. Txij li cov kab teeb no yog cov khoom lag luam patented, muaj tsawg dua manufacturers.
2. Daim ntawv siv
1. Ordinary gantry crane
2.Hydropower chaw nres tsheb gantry crane
Nws yog tsuas yog siv rau kev nqa, qhib thiab kaw lub qhov rooj, thiab tseem tuaj yeem siv rau kev teeb tsa. Lub peev xwm nqa tau ncav cuag 80 mus rau 500 tons, qhov dav me me, 8 mus rau 16 meters, thiab kev nqa ceev yog tsawg, 1 txog 5 meters / min. Txawm hais tias hom crane no tsis nquag nqa, kev ua haujlwm hnyav heev thaum nws siv, yog li qib ua haujlwm yuav tsum tau nce kom tsim nyog.
3. Shipbuilding gantry crane
Siv los sib sau ua ke ntawm lub plhaub ntawm txoj hlua khi, ob lub lifting trolleys yeej ib txwm muaj: ib qho muaj ob lub ntsiab hooks, khiav ntawm txoj kev khiav ntawm lub flange sab saud ntawm tus choj; lwm tus muaj ib lub ntsiab nuv thiab ib tug pab nuv, nyob rau hauv qis flange ntawm tus choj. Khiav ntawm rails tig thiab nqa cov kab loj loj. Lub peev xwm nqa tau feem ntau yog 100 txog 1500 tons; qhov ntev yog mus txog 185 meters; lifting ceev yog 2 mus rau 15 meters / min, thiab muaj ib tug micro txav ceev ntawm 0.1 mus rau 0.5 meters / min.
3. Qib hauj lwm
Gantry crane kuj tseem ua haujlwm qib A ntawm gantry crane: nws qhia txog kev ua haujlwm ntawm crane nyob rau hauv cov nqe lus ntawm kev thauj khoom thiab kev siv tsis khoom.
Kev faib ua haujlwm theem yog txiav txim siab los ntawm crane kev siv qib U thiab thauj khoom Q. Lawv muab faib ua yim theem ntawm A1 txog A8.
Qib ua haujlwm ntawm crane, uas yog, qib ua haujlwm ntawm cov qauv hlau, tau txiav txim siab raws li lub tshuab nqa nqa thiab muab faib ua qib A1-A8. Yog tias piv nrog cov hom kev ua haujlwm ntawm cranes teev nyob rau hauv Suav teb, nws yog roughly sib npaug rau: A1-A4-light; A5-A6- Nruab nrab; A7-hnyav, A8-hnyav ntxiv.
