Miniaturized high-pressure piezoelectric proportional valve based on spring tube displacement amplification

The invention discloses a miniaturized high-pressure piezoelectric proportional valve based on spring tube displacement amplification. The miniaturized high-pressure piezoelectric proportional valve comprises a piezoelectric driving assembly, an elastic amplification assembly, an outer cover, a valve body and an air outlet connector. According to the miniaturized high-pressure piezoelectric proportional valve, the displacement of the piezoelectric driving assembly is amplified into the opening degree of a valve port by utilizing the elastic amplification assembly, and the displacement amplifying function is achieved; and meanwhile, the elastic amplification assembly and the valve body are welded together, and the high-pressure motive sealing function is achieved; the piezoelectric drivingassembly achieves displacement superposition of two piezoelectric ceramics, and original displacement output of the piezoelectric driving assembly is increased. The piezoelectric proportional valve has the characteristics of