Sampling pipeline self-recovery mechanism for roller type sampling device

The utility model discloses a sampling pipeline self-recovery mechanism for a roller type sampling device, which comprises a roller component, a sampling pipeline component, a fixed pulley and a steel cable, the steel cable is wound on the roller component and is connected with the upper end of the sampling pipeline component through the fixed pulley arranged at the top of a tank, and the sampling pipeline component can extend or contract along with the lifting of the steel cable. The sampling pipeline assembly comprises a sampling pipe and a Z-shaped frame, the sampling pipe is arranged on the side wall of the Z-shaped frame and connected with the Z-shaped frame, the sampling pipe stretches and shrinks along with stretching and shrinking of the Z-shaped frame, the Z-shaped frame comprises rectangular steel and a hinge, the rectangular steel is connected through the hinge, the rectangular steel can rotate relative to the other rectangular steel, and the roller assembly can provide rising power for the Z-shape