Self-cleaning type gas flow device

The utility model discloses a self-cleaning type gas flow device, which comprises a gas flow meter, a differential pressure transmitter and a flow totalizer arranged on a gas pipeline. The self-cleaning type gas flow device is characterized in that two pipelines connecting the gas flow meter and the differential pressure transmitter are respectively connected with a two-position three-way solenoid valve in series; during serial connection, the first ports of the two two-position three-way solenoid valves respectively face two pressure taps of the gas flow meter, the third ports of the two-position three-way solenoid valves respectively face two pressure taps of the differential pressure transmitter, and the second ports of the two-position three-way solenoid valves are both communicated with a gas source; and the power control lines of the two two-position three-way solenoid valves are respectively connected with a time relay controller. The device adopts the controller for automatic blowing instead of manual