Safe and reliable wear-resistant fan convenient to disassemble

The safe and reliable wear-resistant draught fan convenient to disassemble comprises a machine base, a working motor fixed to the top of the machine base and a volute fixed to the left side of the machine base, an end cover body is arranged on the left side of the volute, and a filtering assembly is arranged on the side, away from the machine base, of the end cover body. An air inlet pipe matching piece is arranged on the side, away from the end cover body, of the filtering assembly, a bearing assembly is arranged on the side, close to the volute, of the end cover body, and a limiting assembly is arranged on the bearing assembly and comprises two reset springs fixed in the volute. And sliding blocks slidably connected into the volute are fixed to the opposite sides of the two reset springs correspondingly, limiting blocks are fixed to the opposite sides of the two sliding blocks correspondingly, connecting rods are fixed to the opposite sides of the two sliding blocks correspondingly, and grips located outsid