Telescopic pipe of discharging fume

The utility model discloses a telescopic pipe of discharging fume, it includes inner tube, the outer tube that cup joints each other, the inner tube is connected with the collection petticoat pipe, during the inner tube extended income outer pipe inner cavity, the tip welding of inner tube had array inner idler wheel, and inner idler wheel's circumference contacts with the inner wall of outer tube, the tip that the outer tube cup jointed at outer wall of the inner tube is equipped with array outer roller, and outer roller's circumference contacts with the outer wall of inner tube. The overlapping parts's of inner tube and outer tube strong and weak points degree is greater than the external diameter of inner tube. The utility model discloses in the use, the gyro wheel rolls along the outerwall of inner tube or the inner wall of outer tube, and the inner tube changes with the position that album petticoat pipe can be followed to the overlapping parts length of outer tube, and album petticoat pipe of being conv