Turnover mechanism and detecting device for sectional material surface

The invention discloses a turnover mechanism. The turnover mechanism comprises a first driver and a clamping assembly; the first driver is provided with a first rotating shaft, and at least one groupof clamping group is fixed on the first rotating shaft; the clamping assembly is provided with a first clamping head and a second clamping head which are arranged opposite and parallel to each other,and a clamping space with an opening facing outwards is defined between the first clamping head and the second clamping head in a surrounding mode; and when the first driver drives the clamping assembly to rotate, the opening of the clamping space can be in a horizontal direction or a vertical direction. The first clamping head and the second clamping head are arranged opposite and parallel to each other, so that the stability of clamping turnover is kept, then a first straight line where the center line of a sectional material before overturning is located is arranged parallel to a second straight line where the cente