Online speed measuring and meter counting device for straight-seam continuous welded pipe

An on-line speed measuring and meter counting device for a straight seam continuous welded pipe comprises a vertical supporting column, a meter counting mechanism arranged on the vertical supporting column, a meter counter lifting mechanism and a flat roller lifting mechanism. The meter counting mechanism comprises a transverse rotating shaft, a connecting plate, a fixing rod and a meter counting box body; a meter counting support frame, a meter counting encoder, a connecting rod and a meter counting rotating wheel are arranged in the meter counting box body; the meter counter lifting mechanism comprises a fixed seat, a lifting cylinder, a displacement sensor and a mechanical sensor; the flat roller lifting mechanism comprises a fixed box and a rotating handle arranged in the fixed box, the lower end of the rotating handle is connected with a lifting connecting rod, the lower end of the lifting connecting rod is connected with an inverted-U-shaped frame, and a flat roller is arranged in the inverted-U-shaped