Emergency valve having emergency accelerated release function

Abstract

An emergency valve having an emergency accelerated release function, comprising: an emergency valve body, having an emergency cavity, an air inlet of the emergency cavity being in communication with a train pipe; and an inflation valve, comprising an inflation valve body, a first valve core and a second valve core, wherein the inflation valve body has a driving cavity and an inflation cavity which are spaced apart; the first valve core is movably arranged in the driving cavity and divides the driving cavity into a first driving cavity and a second driving cavity, and the second valve core is movably arranged at an air outlet of the inflation cavity, and an air inlet of the inflation cavity is in communication with a brake cylinder, the air outlet of the inflation cavity is in communication with an air inlet of the first driving cavity, and an air outlet of the first driving cavity is in communication with the emergency cavity, and the second driving cavity is in communication with an emergency chamber; wherein the first valve core has an inflation position at which the second valve core is pushed away from the air outlet of the inflation cavity, and a blocking position at which the second valve core is released.