Waste gas sampling device for industrial waste gas detection

The utility model discloses a waste gas sampling device for industrial waste gas detection, which comprises an exhaust pipe and a fixing cover, a fixing block is arranged at the lower end of the exhaust pipe, through holes are arranged at the lower end of the exhaust pipe and inside the fixing block, the fixing cover is arranged below the fixing block, a connecting hole is arranged at the upper end of the fixing cover, and the connecting hole corresponds to the position of the through hole. The outer surface of the fixing rod is rotatably connected with a bottom plate through a bearing, the bottom plate is slidably connected with the lower end of the fixing cover, an annular rack is installed on the side face of the bottom plate and meshed with a gear, and a first motor is installed at the upper end of the gear and fixedly connected with the fixing cover. The controller controls the motor I and the motor II to work in different time periods, waste gas sampling work in different time periods can be automatical