Transposition conveying device of tightness testing, clamping and unloading machine

The invention relates to a transposition conveying device of a tightness testing, clamping and unloading machine. The device comprises a transposition support, a belt conveying device, a side guide rail, a sliding table, a reducer, a transposition motor, an unloading holding table, a transposition rack, a transposition gear, an unloading sliding seat, a material fetching motor, a screw, an L-shaped unloading plate, an unloading motor, an unloading chuck, a semi-circular shaft neck holder, an unloading guide seat and a downward pushing cylinder. The middle of the sliding table is fixedly connected to the upper side of the belt conveying device; the unloading guide seat is fixed right above the unloading holding table; the material fetching motor is fixed at the rear end of the unloading guide seat; the L-shaped unloading plate is mounted right above the unloading sliding seat; the unloading motor is fixed on the upper portion of the rear side of the L-shaped unloading plate; the downward pushing cylinder is fixed to the middle of the front side of the L-shaped unloading plate; the semi-circular shaft neck holder is fixed to the upper end of the downward pushing cylinder. The device has the advantages of reasonable structural design, high automation level and high control sensibility, automatic unloading can be implemented in the valve tightness testing process, and batches of tightness tests of hydraulic valves can be implemented.