The application belongs to the technical field of hydrological test, and discloses a
sediment flow monitoring device for hydrological test, which comprises a
sediment meter, a bottom plate, a stand, a sliding frame, a float, a connecting rod and a mounting plate. The
sediment meter is arranged on the bottom surface of the mounting plate. The top of the sliding frame is provided with two connecting plates. The top surfaces of the connecting plates are provided with two vertical plates at intervals. Two rotating holes are formed in the two vertical plates. A rotating shaft is rotatably arranged in the two rotating holes. A roller is fixedly arranged on the rotating shaft. The roller surface is in contact with the surface of the adjacent stand. The two vertical plates are provided with external thread pipes on the sides away from each other. Rubber damping pipes are arranged in the external thread pipes. The inner ring of the rubber damping
pipe is matched with the rotating shaft. The float drives the sliding frame and the sediment meter to lift. When the roller and the rotating shaft are lifted and rotated, the rubber damping
pipe applies damping force to the rotating shaft, so that the rotating speed of the rotating shaft and the roller is prevented from being too fast, thereby limiting the lifting speed of the float and the lifting frame under the action of
waves and preventing the sediment meter from being damaged by oscillation.