Double-beam portal crane

The utility model discloses a double-beam portal crane which comprises main beams and supporting legs which support the main beams, wherein the two main bodies are mutually parallel, and two end parts are supported by the supporting legs, respectively; columns are arranged at the upper ends of the supporting legs while the lower ends are connected through a lower cross beam; the columns on the left and right supporting legs are connected through a saddle cross beam, and the columns are connected with the saddle cross beam through a fixed assembly; a cab is installed at the bottom of one end of the main beam, a trolley track and a limit switch contact are installed on one end part of the main beam, and large vehicle conductive devices which are mutually overlapped are installed at one end of the trolley track. The double-beam portal crane disclosed by the utility model overcomes the defects in the prior art, and is reasonable in design structure. A door end handrail structure on the main beam is convenient to