Flat-top variable-cross-section mast of large-span raking machine

Abstract

The invention relates to a flat-top variable-cross-section mast of a large-span raking machine. The flat-top variable-cross-section mast comprises a first mast beam, a second mast beam, a first tail seat and a second tail seat as well as a mast top of a ladder-shaped flat-top structure, wherein the first tail seat is arranged at the bottom end of the first mast beam; the second tail seat is arranged at the bottom end of the second mast beam; all cross sections of the mast are formed by welded connection of an upper cover plate, a lower cover plate and a web plate; the inner walls of the mast are welded by angle steel; the first mast beam and the second mast beam are symmetrically arranged on two ladder-shaped waist surfaces of the mast top; the top ends of the first mast beam and the second mast beam are respectively matched with the ladder-shaped waist surfaces of the mast top in size; the included angle between the extending lines of the upper cover plate and the lower cover plate is 1-3 DEG; the cross section areas of the first mast beam and the second mast beam are gradually increased from the joints with the first tail seat and the section tail seat to the joint with the mast top. According to the flat-top variable-cross-section mast, local high stress is reduced, the thickness of plates is reduced, and materials are more reasonably applied.

Description

technical field [0001] The invention relates to a large-scale raking machine mainly used in coal mines and large chemical fertilizer industries, in particular to a door frame structure of the raking machine. Background technique [0002] The rake machine is mainly used for stacking and reclaiming operations in the bulk warehouse. Its main body is composed of a door frame, an end beam, a rake arm and a connecting arm, and the door frame is the main bearing part. At present, the portal frame used by the large-span raking machine is a box-shaped structure with a herringbone shape and equal cross-sections up and down. The defect of this structure is: the force of the gantry is mainly near the end and the spire, and one side of the gantry will deviate outward during installation, causing excessive force on the spire, and in serious cases, there is a danger of the door frame collapsing; secondly, The mechanical characteristics of the mast were not considered in the design. In ord...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: to overcome the unreasonable force of the portal frame and the waste of materials in the prior art, and provide a flat-top variable-section portal frame for a large-span rake machine, which not only reduces the weight of the portal frame , and makes the structure of the mast more reasonable, improving the operation reliability of the mast

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