
Ikhreyini ebalekayo ephezulu isebenza kwiireyile zekhreyini ezisisigxina ezixhonywe kumphezulu womgaqo weenqwelo-moya ngamnye. Olu yilo luvumela iilori zokuphela okanye iinqwelo zokuphelisa ukuxhasa ibhulorho engundoqo kunye ne-hoist yokuphakamisa njengoko zihamba kakuhle kunye nephezulu yenkqubo yendlela yeenqwelo-moya. Indawo ephakamileyo ayiboneleli nje ngobude obugqwesileyo be hook kodwa ikwavumela iindawo ezibanzi, ukwenza iikhreyini zokubaleka eziphezulu zibe lukhetho olukhethwayo lwezixhobo ezifuna amandla okuphakamisa okuphezulu kunye nokugubungela okuphezulu.
Iikhreyini eziqhubayo eziphezulu zinokwakhiwa nokuba kukwi-girder enye okanye kwi-double girder configurations. Kuyilo lwegida enye, ibhulorho yecrane ixhaswa ngumqadi omnye ophambili kwaye ngokuqhelekileyo isebenzisa itroli ephantsi kunye ne-hoist. Olu lungelelwaniso luyonga iindleko, lukhaphukhaphu, kwaye lulungele ukusetyenziswa kokukhanya ukuya kophakathi. Uyilo lwebhanti ephindwe kabini lubandakanya imiqadi emibini ephambili kwaye ngokuqhelekileyo isebenzisa itroli ebalekayo ephezulu kunye ne-hoist, evumela amandla aphezulu, ukuphakama kwehuka enkulu, kunye nokukhethwa kokuncamathisela okongeziweyo okunje ngeendlela zokuhamba okanye iiplatifomu zokulondoloza.
Izicelo eziqhelekileyo: Ukwenziwa kokukhanya, ukuvelisa kunye neevenkile zoomatshini, iintambo zendibano, imisebenzi yendawo yokugcina impahla, izibonelelo zogcino, kunye neendibano zocweyo zokulungisa.
♦ Iimpawu eziphambili
I-top girder cranes eziqhubayo ziyilwe kunye nesakhiwo esihlangeneyo kunye ne-deadweight ephantsi, okwenza kube lula ukuyifaka kunye nokugcina. Ukusetyenziswa kwabo okuncitshisiweyo kwezinto eziphathekayo xa kuthelekiswa noyilo lwe-double girder kukhokelela kwiindleko eziphantsi zemveliso kunye nexabiso elithe xaxa loqoqosho. Ngaphandle kolwakhiwo lwabo olukhaphukhaphu, basenokufikelela ekusebenzeni ngokuphakamisa okuchukumisayo. Uyilo lukwavumela ukuhamba ngokukhawuleza kwe-crane kunye nesantya sokunyusa, ukwandisa ukusebenza kakuhle.
Kumashishini afuna isisombululo esinokwethenjelwa, esisebenzayo, kunye neendleko ezisebenzayo zokuphakamisa, i-crane ephezulu eqhuba i-crane eyodwa yegirder inika ibhalansi egqibeleleyo phakathi kokusebenza kunye nokufikeleleka. Nokuba zisetyenziswa kwimizi-mveliso, kwiindawo zokugcina iimpahla, okanye kwiindawo zokulungisa, ezi cranes zibonelela ngenkonzo ethembekileyo, ukusebenza ngokulula, kunye neemfuneko zogcino olungephi, nto leyo ezenza zibe lutyalo-mali olukrelekrele kwiimfuno zokuphatha izinto eziphathekayo zexesha elide.
Ikhreyini yebhulorho ebalekayo ephezulu yenziwe ngobunjineli kunye nebhulorho ebekwe ngaphezulu kwemiqadi yendlela yeenqwelo-moya, ivumela ikhreyini yonke ukuba isebenze phezu kwesakhiwo sendlela yeenqwelo-moya. Olu luyilo oluphakamileyo lubonelela ngenkxaso ephezulu, ukuzinza, kunye nokuphakama kwe-hook, okwenza kube yinto efanelekileyo kwimisebenzi yokuphakamisa umsebenzi onzima kwiindawo zoshishino.
♦ Uyilo lwesakhiwo
Ibhulorho:Umqadi ophambili othe tyaba othe tyaba phakathi kwemiqadi yomgaqo weenqwelo-moya, eyilelwe ukuba ithwale isinyusi kunye nokwenza uhambo oluthe tye.
Phakamisa:Indlela yokuphakamisa ehamba ecaleni kwebhulorho, ekwaziyo ukuphatha imithwalo enzima ngokuchanekileyo.
Iilori zokuphelisa:Zimiswe kuzo zozibini iziphelo zebhulorho, ezi yunithi zivumela ibhulorho ukuba ihambe kakuhle ecaleni kwemiqadi yeenqwelo-moya.
Imiqadi yoMbaleko:Imiqadi enzima efakwe kwiintsika ezizimeleyo okanye edityaniswe kwisakhiwo sesakhiwo, exhasa yonke inkqubo yecrane.
Olu yilo luphucula umthamo womthwalo kunye nokuthembeka kwesakhiwo, okwenza ukuba ukusebenza okukhuselekileyo nokuthembekileyo kwizicelo ezifunwayo.
♦Indlela yokubeka uloliwe kunye neNkqubo yeNkxaso
Kwiikhreyini zebhulorho ezihamba phezulu, iireyile zibekwe ngokuthe ngqo phezulu kwimiqadi yendlela yeenqwelo-moya. Oku kubekwa akuvumeli kuphela umthamo omkhulu wokuphakamisa kodwa kunciphisa ukujikeleza kunye nokuphambuka ngexesha lokusebenza. Inkqubo yenkxaso ngokuqhelekileyo yakhiwe kwiintsika zentsimbi ezomeleleyo okanye idityaniswe nesakhelo esikhoyo sesakhiwo. Kufakelo olutsha, isixokelelwano somgaqo weenqwelo-moya sinokuyilelwa ukusebenza okuphezulu; kwizakhiwo ezikhoyo, ukuqinisa kunokufuneka ukuhlangabezana nemigangatho yokuthwala umthwalo.
♦Umthamo womthwalo kunye ne-Span
Olunye uncedo oluphambili lweekhreyini zebhulorho ezibalekayo kukukwazi kwabo ukuphatha imithwalo emikhulu kakhulu kunye nokugubungela iindawo ezibanzi. Ubuchule bunokusuka kwiitoni ezimbalwa ukuya kwiitoni ezingamakhulu aliqela, kuxhomekeke kuyilo. Ubude—umgama phakathi kwemiqadi yomgaqo weenqwelo-moya-unokuba mde kakhulu kunolo lweekhreyini ezibalekayo, okuvumela ukuphathwa kakuhle kwemathiriyeli kwimigangatho emikhulu yokwenziwa kwemveliso, iindawo zokugcina iimpahla, kunye neendawo zokudityaniswa.
♦Ukwenza ngokwezifiso kunye nokuguquguquka
Iikhreyini zebhulorho ezihamba phezulu zinokulungiswa ngokupheleleyo ukuze zihambelane neemfuno zokusebenza. Oku kubandakanya ubude besithuba esilungiselelweyo, amandla okuphakamisa, isantya sokuphakamisa, kunye nokudityaniswa kwezixhobo ezikhethekileyo zokuphakamisa. Izinketho zokuzenzekelayo kunye nokusebenza okude kunokudityaniswa ukuphucula ukusebenza kakuhle kunye nokhuseleko.
Ngokubanzi, uyilo lwe-crane yebhulorho ebalekayo ephezulu idibanisa amandla olwakhiwo, ukusebenza kakuhle, kunye nokuguquguquka. Ukukwazi kwayo ukuphakamisa imithwalo enzima, ukugubungela iindawo ezinkulu zokusebenza, kunye nokugcina uzinzo kuyenza ibe sisixhobo esiyimfuneko kumashishini afana nokuveliswa kwentsimbi, ukwakha iinqanawa, i-aerospace, ukuveliswa okunzima, kunye nokugcinwa kwezinto ezinkulu.
♦ Iikhreyini zebhulorho ezibalekayo eziphezulu zigqame ngokukwazi kwazo ukuphatha imithwalo enzima, nto leyo ezenza zibe lolona khetho lufanelekileyo lokufuna ukuphakamisa izicelo. Ngokuqhelekileyo zikhulu kuneekhreyini zebhulorho ezixhonywe phantsi, zibonisa uyilo olomeleleyo oluvumela umthamo ophezulu womthwalo kunye nezithuba ezibanzi phakathi kwemiqadi yendlela yeenqwelo-moya.
♦ Ukuxhoma itroli phezu kwebhulorho kunika izibonelelo zolondolozo. Ngokungafaniyo neekhreyini ezixhonywe phantsi, ezinokufuna ukususwa kwetroli ukuze ufikelelo, iikhreyini ezihamba phezulu kulula ukuzisebenzisa. Ngeendlela zokuhamba ezifanelekileyo okanye iiplatifomu, imisebenzi emininzi yokulondoloza inokuqhutyelwa kwindawo.
♦Ezi cranes ziyagqwesa kwindawo ezinomda ongephi. Inzuzo yabo yokuphakama ibalulekile xa ubude behook bufunekayo kwimisebenzi yokunyusa. Ukutshintsha ukusuka kwi-underhung ukuya kwi-crane eqhubayo ephezulu kunokongeza i-3 ukuya kwi-6 yeenyawo zokuphakama kwe-hook-inzuzo ebalulekileyo kwizibonelelo ezinophahla oluphantsi.
♦ Nangona kunjalo, ukuba netroli ibekwe ngasentla ngamanye amaxesha kunokunciphisa intshukumo kwiindawo ezithile, ngakumbi apho uphahla luthambekile. Olu lungelelwaniso lunokunciphisa ukugquma kufutshane nophambano lwesilingi ukuya eludongeni, luchaphazela ukulawuleka.
♦ Iikhranethi zebhulorho ezihamba phezulu zifumaneka kuzo zombini i-girder enye kunye ne-double girder designs, kunye nokukhethwa kuxhomekeke ngokukodwa kumthamo ofunekayo wokuphakamisa. Ukuphonononga ngononophelo iimfuno zesicelo kubalulekile xa kusenziwa isigqibo phakathi kwezi zimbini.