Kutheni ibizwa ngokuba yiPortal Crane?
A ikreni yesango, eyaziwa ngokuba yi-gantry crane, luhlobo lwe-crane oluphawulwa bulwakhiwo lwayo olwahlukileyo, oluquka ibhulorho exhaswa ziinyawo ezimbini nangaphezulu. Olu yilo luvumela i-crane ukuba ihambe ngokweendlela ezahlukeneyo, nto leyo eyenza ukuba ibe nokuguquguquka kakhulu kwimisebenzi eyahlukeneyo yokuphakamisa nokuthutha, ingakumbi kwiindawo zoshishino nezokwakha. Kodwa kutheni ibizwa ngokukodwa ngokuba yi-"portal crane"?
Igama elithi “portal” libhekisa kwindlela eyakhiwe ngayo ikreyini nesango okanye umnyango. Isakhiwo senza isakhelo esifana nesango esijikeleza indawo ekhethiweyo, esivumela ukuba siphakamise kwaye sihambise imithwalo enzima kwindawo ebanzi. Olu yilo luluncedo ngakumbi kwiindawo ezifana neendawo zokubeka iinqanawa, iindawo zokugcina impahla, kunye neendawo zokwakha, apho izinto ezinkulu kufuneka zithuthwe ngokufanelekileyo.
Uyilo lwekreyini yesango alusebenzi nje kuphela kodwa lukwangumqondiso. Isici "sesango" sibonisa amandla ekreyini okudala indawo yokuvula okanye yokufikelela koomatshini abanzima kunye nezixhobo, okwenza kube lula ukuhamba kweempahla ukusuka kwenye indawo ukuya kwenye. Oku kubaluleke kakhulu kwiindawo apho indawo incinci khona, kwaye ukukwazi ukuhamba kubalulekile.
Ngaphezu koko, igama elithi “portal” ligxininisa ubuchule bekreyini bokusebenza kwindiza enamacala amabini, ihamba ngokuthe tye ecaleni kwendlela ngelixa iphakamisa ngokuthe nkqo. Olu phawu lubini lwenza ukuba iikreyini zekreyini zibe yimfuneko kumashishini ahlukeneyo, kuquka ukuthunyelwa kwempahla, ukwenziwa kwempahla, kunye nokwakhiwa.
Ixesha leposi: Disemba-05-2024