Medium-pressure long pipe blower

A medium-pressure long-pipe air feeder relates to the technical field of medium-pressure fans and comprises a shell, a first air outlet pipe, a first silencing pipe, a motor box, an end cover, a firstair inlet pipe, a second silencing pipe, a filter plate, a medium-pressure fan body and sound absorption cotton. The shell is of a cylindrical structure, and the upper end of the shell is open. The first air outlet pipe is arranged on the shell and is communicated with the shell; the first silencing pipe is arranged on the first air outlet pipe, and the first silencing pipe is communicated with the first air outlet pipe; the motor box is of a hollow cylindrical structure, is arranged at the bottom of the shell and is communicated with the shell; the end cover is clamped on the upper end surface of the shell; the first air inlet pipe is arranged on the end cover and is communicated with the shell; the second silencing pipe is arranged on the first air inlet pipe and communicated with the first air inlet pipe. When