Unmanned aerial vehicle monitoring sampler with adjustable range

The range-adjustable unmanned aerial vehicle monitoring sampler comprises an upper connecting piece, a lower cross rod, a supporting rod and a piston block, the upper connecting piece is provided with the upper cross rod, the lower side of the upper cross rod is provided with a fixing block, the lower end of the fixing block is provided with the lower connecting piece, and the lower connecting piece is provided with the supporting rod. The upper connecting piece and the lower connecting piece are of an n-shaped structure, the supporting rod is installed on the lower side of the outer rotary drum, an L-shaped fixing plate is connected to the supporting rod, a connecting piece is arranged on the fixing plate, the fixing plate is rotationally connected with the connecting piece, the piston block is installed on the telescopic rod and arranged in the collecting barrel, and the piston rod is connected with the piston block. And the collecting barrel and the external rotating drum form a rotating structure through