Bend alarm for Flameproof and Intrinsically Safe equipment, including sensors, speakers, light-emitting diode display circuit intrinsically safe signal circuits. Bend alarm connected with explosion-proof solenoid valve can be realized in the locomotive by automatic spraying. Between curves alarm "sensor" no trigger (high), alarm display lit green safety by identifying; when between terminals "sensor" is activated, the signal (low level), locomotive trigger sensors, green off and displays a red "traffic is not allowed to pedestrians," the luminous fonts, and while continuing to report the speech "locomotive through the corners, pedestrian note," the language of voice prompts; font voice and luminous warning delay time is 15 seconds ± 5 seconds after the delay time, turn off the alarm in red, green steady recovery prompt LED logo, voice stopped. Bend alarm using a coal mine Danger of each track partial mouth, throttle up and down the depot and other places, when the locomotive is running to these places when you need an alarm such as: the corners alarm on the corners, the turnout at the beginning of language Alarm: "locomotive through the corners, pedestrian note." The alarm on the throttle at the corners, timely tips "pedestrians, close the damper," after the throttle open, "in front of the shooting, immediately withdraw people, no entry."