Smoke dust sampling gun with sampling head convenient to replace

The utility model discloses a smoke dust sampling gun convenient to replace a sampling head, which comprises a controller, a grip is fixedly arranged at the rear end of the controller, an air pump is arranged in the controller, a sampling tube is hermetically arranged at the left end of the controller, the outer end of the sampling tube is hermetically connected with a gun head, and the diameter of the gun head is smaller than that of the sampling tube. And the upper side and the lower side of the right end of the gun head are both provided with grooves for installing protruding blocks, and the structures of the two protruding blocks are the same. The smoke dust sampling gun convenient to replace the sampling head is provided with the mounting frame, the single-rotation reciprocating screw rod, the wind wheel and the cleaning scraper, and the wind wheel is driven to rotate under the action of the air extracting pump, so that potential energy of air extraction of the air extracting pump can be well and conveni