Automatic sand turning device and method of experimental sand bed

The invention discloses an automatic sand turning device and method of an experimental sand bed, and relates to the technical field of river sediment water tank experiments of water conservancy projects, environmental engineering and coast engineering. The device and the method are mainly used for solving a problem that sand cannot be uniformly and completely turned over during different groups ofexperiment gaps of a sediment moving bed water tank. The device at least comprises two automatic lifting rods (1), two automatic rotating rollers (4) and component connecting bayonets (5) for connecting the automatic lifting rods (1) and the automatic rotating rollers (4), and further comprises a circular-tube-shaped sleeve rod (2) installed in the automatic rotating rollers (4) and a set of arc-shaped blades (3) fixed to the circular-tube-shaped sleeve rod (2) at equal intervals. The method mainly comprises the step that the automatic lifting rods (1), the automatic rotating rollers (4) andan automatic moving platfo