Flue gas flow velocity measuring device

The utility model provides a flue gas flow velocity measuring device, which belongs to the field of flow velocity measuring equipment, and comprises a velocity measuring assembly, a wind pressure transmitter and a purging assembly, the velocity measuring assembly is installed on a flue, and the velocity measuring assembly and the axial direction of the flue are vertically distributed or distributed at an included angle of 0-60 degrees; the wind pressure transmitter is communicated with the speed measuring assembly through an air inducing pipe, is in communication connection with an upper computer, and is used for converting the differential pressure measured by the speed measuring assembly into a current signal or a digital signal and transmitting the current signal or the digital signal to the upper computer; the blowing assembly communicates with the speed measuring assembly and is used for blowing dust at the speed measuring assembly. According to the utility model, the dust at the speed measuring assembly