Self-suction dust removal impact type fly ash sampling device

The utility model discloses a self-suction dust removal impact type fly ash sampling device which is characterized in that a groove end at the upper end of a groove ash falling pipe is arranged in a flue, a groove faces the flue gas inflow direction of the flue, the lower end of the groove ash falling pipe extends out of the flue, an ash falling valve is arranged on the groove ash falling pipe, and the groove end of the groove ash falling pipe faces the flue gas inflow direction of the flue. An inlet of the ash storage tank is connected with the lower end of the groove ash falling pipe; the Venturi injection pipe is installed in the flue, the inlet end of the Venturi injection pipe faces the flue gas inflow direction, the outlet end of the spray pipe is located in the flue and installed on the throat portion of the Venturi injection pipe, the inlet end of the spray pipe extends out of the flue, the spray pipe valve is installed at the inlet end of the spray pipe, and the spray pipe valve is connected with the