EMERGENCY VALVE HAVING EMERGENCY ACCELERATION RELIEVING FUNCTION

An emergency valve having an emergency acceleration release function. The emergency valve comprises: an emergency valve body (10), which has an emergency chamber (11), wherein an air inlet of the emergency chamber (11) is in communication with a train pipe (20); and an inflation valve (30), which comprises an inflation valve body (31), a first valve core (32) and a second valve core (33), wherein the inflation valve body (31) is provided with a driving chamber (311) and an inflation chamber (312), which are spaced apart, the first valve core (32) is movably arranged in the driving chamber (311) and divides the driving chamber (311) into a first driving chamber (3111) and a second driving chamber (3112), the second valve core (33) is movably arranged at an air outlet of the inflation chamber (312), an air inlet of the inflation chamber (312) is in communication with a brake cylinder (40), the air outlet of the inflation chamber (312) is in communication with an air inlet of the first driving chamber (3111), an air outlet of the first driving chamber (3111) is in communication with the emergency chamber (11), and the second driving chamber (3112) is in communication with the emergency chamber (21). The first valve core (32) is provided with an inflation position, in which the second valve core (33) is pushed away from the air outlet of the inflation chamber (312), and a blocking position, in which the second valve core (33) is released. The device can solve the problems of requiring a long relieving time and a large amount of energy consumption of a train after emergency braking is performed in the related art.