The invention discloses a power cabinet for a sample pneumatic conveying
system. The power cabinet comprises a cabinet body. A fan capable of blowing air and sucking air, an outside communicating vent
pipe used for communicating with the outside, a
pipe communicating vent
pipe used for communicating with a pneumatic conveying pipe and a four-way
ball valve are arranged in the cabinet body. The four-way
ball valve communicates with the outside communicating vent pipe, the pipe communicating vent pipe and an air inlet and an air outlet of the fan at the same time. During air blowing pneumatic conveying, outside air sequentially passes through the outside communicating vent pipe, the four-way
ball valve and the air inlet to be sucked into the fan and then sequentially passes through the air outlet, the four-way ball valve and the pipe communicating vent pipe to be blown into the pneumatic conveying pipe. During air sucking pneumatic conveying, the air in the pneumatic conveying pipe sequentially passes through the pipe communicating vent pipe, the four-way ball valve and the air inlet to be sucked into the fan and then sequentially passes through the air outlet, the four-way ball valve and the outside communicating vent pipe to be discharged into the outside. The power cabinet has the beneficial effects of being simple and compact in structure, low in cost, environment-friendly, safe, easy to
mount and maintain and good in pneumatic conveying effect.