Collecting device mounted on precipitation tube, precipitation tube and drilling tool

The invention relates to a collecting device used for being installed on a precipitation pipe, the precipitation pipe and a drilling tool, and relates to the technical field of engineering drilling equipment.The collecting device comprises an expansion piece used for being arranged at the end of the precipitation pipe, the upper end of the expansion piece extends out of the precipitation pipe, and the lower end of the expansion piece is located in the precipitation pipe; the restoring mechanism is connected with the expansion piece, when the drilling tool rotates, the expansion piece moves in the radial direction of the sedimentation pipe under the action of centrifugal force, the outer side of the upper end of the expansion piece abuts against the hole wall, and when the drilling tool stops rotating, the restoring mechanism is used for providing restoring force for restoring the expansion piece to the initial state. Due to the fact that when the drilling tool rotates, the expansion piece bears centrifugal fo