Main beam structure of bridge crane

The utility model discloses a main beam structure of a bridge crane, which comprises an upper cover plate (1), a lower cover plate (2) and a web (3), wherein the web is connected with the upper cover plate (1) and the lower cover plate (2) in a welding way; the main beam structure of the bridge crane is characterized in that two ends of a horizontal section of the upper cover plate (1) extend upwards; an angle of 30-60 degrees is formed between an extension section and the horizontal section; the lower cover plate is parallel to the upper cover plate; the upper cover plate is connected with the lower cover plate by a connecting plate (4), so that a strip-shaped groove can be formed; and the cross section of the groove is a trapezoid notch (5). As the two ends of the upper and the lower cover plates of a main beam of the crane extend upwards, and the strip-shaped groove is formed, the crane is not limited by the structural height of a plant so as to meet the demand of hoisting in equipment application and the contour dimension of hoisting equipment.