Hole depth measuring assembly based on anchor rod trolley design

The invention belongs to the technical field of hole depth measuring equipment, and particularly relates to a hole depth measuring assembly based on anchor rod trolley design, which comprises a mounting seat, the mounting seat is of a plate-shaped structure, a measuring tube is mounted on the mounting seat, and the measuring tube is jointly composed of an inner tube and an outer tube which are mutually sleeved; the distance between the inner pipe and the outer pipe is measured through a displacement sensor; the core pipe is fixedly installed in an inner cavity of the outer pipe, and the end, away from the inner pipe, of the core pipe is externally connected with a hydraulic pump through a hydraulic pipe; the device further comprises a slag removing and dredging mechanism which is used for dredging and cleaning low disintegrating slag of the anchor rod hole and preventing the depth of the anchor rod hole from being affected by the disintegrating slag. The conveying mechanism is matched with the slag removing a