Chimney sampling device

The utility model relates to a sampling device, and in particular relates to a chimney sampling device for detecting chimney components of factories. The chimney sampling device comprises a communicating pipe arranged on the outer wall of a chimney, wherein the position of a central shaft of the communicating pipe is also provided with a suction pipe, the communicating pipe is divided into a lower-part inlet section, a middle-part expansion section and a top-part reflux section, the inner diameter of the top-part reflux section is larger than that of the lower-part inlet section, the middle-part expansion section is in transition connection with the lower-part inlet section by virtue of a cone-shaped pipe, the inlet of the lower-part inlet section is formed in the lowest position of the communicating pipe, and a condensate collecting tank is arranged below the inlet; and the inlet of the suction pipe protrudes out of the lower-part inlet section of the communicating pipe, the outlet of the suction pipe is formed in the expansion section of the communicating pipe, a one-way gas outlet valve is also arranged at the outlet of the suction pipe, and the middle part of the suction pipe is provided with a suction opening which is connected to the outer wall of the communicating pipe. The sampling device which adopts a technical scheme disclosed by the utility model is convenient to sample, and is also not easy to condense; and moreover, the inner wall of the chimney cannot be corroded.