Device for collecting pulverized coal in coal mine air

The device comprises a shell and four walking assemblies fixedly connected to the four corners of the bottom of the shell, air inlet shells are fixedly connected to the two symmetrical outer walls of the shell, inner cavities of the air inlet shells communicate with an inner cavity of the shell, check plates are fixedly connected to the bottom ends of the inner cavities of the air inlet shells, and the check plates are fixedly connected to the bottom ends of the check plates. A non-return plate is arranged in the shell, the non-return plate is of a triangular prism structure, the top end of the non-return plate extends outwards to the inner cavity of the shell, the top surface of the non-return plate is of a slope structure which is sequentially heightened towards one side of the inner cavity of the shell, a detachable filtering assembly is arranged on the side wall of the inner cavity of the shell, and the filtering assembly is located at the bottom ends of the two air inlet shells. When flowing to the exhau