FHMG400/75-33A4 Gantry Crane: An Overview
FHMG400/75-33A4 gantry crane is a big sized product specially designed for outdoor lifting and moving large transformers. The main structure of the product adopts box frame construction, double-girder and single trolley with the M.H. rated lifting capacity of 400t, A.H. rated lifting capacity of 75t and span of 33m.
The gantry crane mainly comprised main girder, supporting leg, lower beam, grade one connection beam, grade two connection beam, travelling bogie, trolley, platform railing and electrical control system. The main steel structure, like main girder, supporting leg and lower beam, is connected by flange, which will quicken and facilitate equipment assembly and adapt to long and short distance transportation.
Lifting Mechanism
Diagram 1-1 Trolley Mechanism Layout Diagram
Trolley Travelling Mechanism
Diagram 1-2 Trolley Travelling Mechanism
Crane Travelling Mechanism
The drive of crane travelling mechanism adopts "three-in-one" drive unit consisted of gearbox, variable-frequency motor and electromagnetic brake, which is compact in structure, small in cubage and convenient in assembly and maintenance. In addition, polyurethane buffer is applied. At the end face of bogie along both sides of rail, "three-in-one" new model rail clamp is equipped, which integrates rail sweeping, clamping and buffering into one unit. Meanwhile, the rail clamp is equipped with stroke switch to achieve electric interlock of crane travelling mechanism. The alarm light is equipped on crane travelling bogie for sending alarm notice during crane operation.Structure Portion
The main structure of FHMG400/75-33A4 gantry crane is made of main girder and double rigid legs, both of which adopt plate beam structure, high strength bolt in connection and advanced finite element structure design software in calculation.Electrical Portion
The electrical portion of FHMG400/75-33A4 gantry crane is mainly consisted of electric station, cabinet, strokes limit for each mechanism, cable reel, overload limit and connecting cable. Electric station inside is equipped with power supply/PLC control panel, main lifting control panel, auxiliary lifting control panel, crane travelling control panel and trolley travelling control panel. Cabinet inside is equipped with operation console, overload protection display screen, touch screen, operation, and monitoring facility.
NBM&CW April 2013