Water quality detection dual-purpose sampling device

The utility model discloses a dual-purpose sampling device for water quality detection. The device comprises a floating tool and a sampling assembly, the floating tool is an annular air bag; a mounting box is fixed in the middle of the floating tool; a second gear and a transition gear are rotationally arranged in the middle in the mounting box; the second gear is meshed with the transition gear;the top end of the second gear penetrates through a top plate of the mounting box; winding mechanisms are arranged on the two sides in the mounting box correspondingly. The winding mechanism comprisesa first gear, a wire spool and a rotating shaft; the rotating shaft is rotationally mounted in the mounting box; wherein the first gear and the wire spool are coaxially fixed on the rotating shaft, the first gear in one wire winding mechanism is directly meshed with the second gear, the first gear in the other wire winding mechanism is directly meshed with the transition gear, a driving mechanismfor driving the second gea