Swing-arm type multipoint constant-speed powdered material sampling device

The utility model relates to a rotary-arm multi-point uniform-speed sampling device. A side of a sampling pipe is enclosed and the other side is connected with a hollow shaft and communicated with the hollow shaft. The sampling pipe is installed with a plurality of sampling nozzles facing to the flowing direction of powder-like material air current. The enclosed side of the hollow shaft is provided with a handle and the other side is connected with a cyclone separator through a sampling valve. The lower portion of the cyclone separator is equipped with a collecting bottle. The topside of the cyclone separator is arranged with an exhaust opening communicated with an air extractor through an exhaust pipe. The air-admission valve is connected with the air extractor through an air-admission pipe. The air extractor is communicated with a rear air-admission pipe through the air-admission valve.