Rust-proof magnetic protective cover for bolt

The utility model belongs to the technical field of bolt rust prevention, and particularly relates to a bolt rust prevention magnetic protective cover. The cover comprises a cover body and magnetic blocks, the cover body is of a barrel-shaped structure with a downward opening, the multiple magnetic blocks are distributed and installed at the bottom of the outer surface of the cover body in an annular array shape, and the electromechanical equipment is attracted through the multiple magnetic blocks, so that the lower end of the cover body is in sealed contact with the electromechanical equipment; an oil injection hole is formed in the top of the cover body, and a cover body is arranged on the oil injection hole. The anti-rust and anti-dust isolation device for the bolt can play an anti-rust and anti-dust isolation role on the bolt, and has high universality. 本实用新型属于螺栓防锈技术领域，具体涉及一种螺栓防锈磁性防护罩。本实用新型包括罩体和磁性块，所述罩体为开口向下的桶状结构，多个磁性块呈环形阵列状分布安装于罩体外表面底部，通过多个磁性块吸附机电设备，使得罩体下端与机电设备密封接触；所述罩体顶部开有注油孔，所述注油孔上设有盖体。本实用新型能够起到对螺栓的防锈和