Low-pressure emergency braking device for railway air supply device

The utility model relates to a low-pressure emergency braking device for a railway air supply device, which comprises a KP36 pressure switch arranged on an air circuit board and communicated with the corresponding air supply device, and an emergency pressure switch (PS5) communicated with the two air supply devices at the same time is further arranged on the air circuit board. According to the low-pressure emergency braking device for the railway air supply devices, when the pressure is reduced to 600 +/-20 kPa, a control room can display an alarm signal of insufficient pressure, the two air supply devices are started at the same time, when the pressure of the air storage tank is increased to 700 +/-20 kPa, the alarm is relieved, and when the pressure of the air storage tank is 900 +/-20 kPa, the two air supply devices stop working; according to the low-pressure emergency braking device for the railway air supply device, the stability and the reliability of a cooling system of the air supply device are improv