Small quick-change structure and high-pressure gluing nozzle switching system

The invention discloses a small-sized quick-change structure and a high-pressure gluing nozzle switching system, and the small-sized quick-change structure comprises a connecting block; the connecting sleeve is arranged at the lower end of the connecting block, a plurality of guide grooves are formed in the connecting sleeve, and a plurality of through openings are formed in the connecting sleeve; a channel is formed in the contact sleeve block, and an inclined ring surface is formed at the lower part of the channel; the multiple guide pins are evenly arranged in the annular direction of the channel, and the guide pins are arranged in the guide grooves in a sliding mode; the limiting beads are arranged in the through holes; and the upper portion of the sub-body piece sinks inwards in the annular direction to form an annular groove, and the limiting balls movably abut against the interior of the annular groove. Through the application of the small-sized quick-change structure, the sub-body part can be quickly