Structural beam, cantilever crane and mechanical equipment

The structural beam comprises a hollow beam body, and further comprises a plurality of first protruding strips which are located on the inner bottom face and the inner top face of the hollow beam body respectively and integrally formed with the hollow beam body. The supporting plates are located in the hollow beam body, the supporting plates and the first protruding strips are integrally formed, the supporting plates are parallel to the inner side wall of the hollow beam body, X-shaped supporting bodies are arranged between the supporting plates, the X-shaped supporting bodies and the supporting plates are integrally arranged, and the X-shaped supporting bodies are located in the middle of the interior of the hollow beam body; the structural beam has excellent bearing capacity. 本实用新型公开一种结构梁、臂架和机械设备，包括空心梁体，还包括分别位于空心梁体内底面和内顶面上并与空心梁体一体成型的若干个第一凸起条；以及位于空心梁体内并与第一凸起条为一体成型的若干个支撑板，所述支撑板均与空心梁体内侧壁相平行，所述支撑板之间设置有X型支撑体，所述X型支撑体与支撑板为一体式设置，所述X型支撑体位于空心梁体内部中间处；该结构梁具有出色的承重能力。