Three-zone gas sample collection device in coal mine underground goaf

The utility model discloses a three-zone gas sample collection device in a coal mine underground goaf, and relates to the safety measurement tools of coal industries. The hree-zone gas sample collection device in the coal mine underground goaf comprises a gas extraction pipe and a beam tube, wherein the beam tube comprises a core tube and a reducer union; one end of the reducer union is connected with the gas extraction pipe while the other end thereof is connected with the beam tube; that is, the gas extraction pipe is communicated with the beam tube through the reducer union. The three-zone gas sample collection device in the coal mine underground goaf is a tool used for extracting gases in the coal mine underground goaf to judge distribution of the three zones, and has the advantages of being energy-saving, simple to operate, safe and reliable.