Rail vehicle rescue braking system and control method

Abstract

The invention discloses a rail vehicle rescue braking system and a control method. The system is characterized by comprising a pneumatic rescue control unit, and the pneumatic rescue control unit comprises a pressure reducing valve, an electromagnetic valve, a test interface and two piston valves; a main air cylinder is connected with an inlet of the pressure reducing valve, and the pressure reducing valve is connected with the electromagnetic valve and the piston valves and is connected with a bidirectional valve arranged between an emergency electromagnetic valve and a weighing pressure limiting valve in a pneumatic brake control unit for common brake control; one end of the first piston valve is connected with the main air cylinder, and the other end of the first piston valve is connected with an emergency brake electromagnetic valve in the pneumatic brake control unit; the two piston valves are connected with a train pipe penetrating through a train, the train pipe is connected with a rescue locomotive train pipe, and the piston valves are controlled by the train pipe pressure. When a faulty train unit is rescued, power supply of all the electromagnetic valves is cut off, and pure pneumatic control over the braking system of the faulty train unit can be achieved only through the train pipe connected with a locomotive. The speed of the train in the rescue process is increased, the rescue time is saved, and the influence on the normal operation order is reduced. The situation that long-distance rescue cannot be guaranteed due to limitation of the capacity of a storage battery when electrical failures happen to the faulty train unit is avoided, and the safety of the train is ensured.

Description

technical field [0001] The invention belongs to the field of railway transportation, and in particular relates to a braking system and a control method for rail vehicle rescue. Background technique [0002] Fixed formation of rail vehicles, such as urban rail vehicles and EMUs that fail to operate, are generally connected by a rescue locomotive to the faulty train set and then pulled back to the warehouse for rescue. At present, the braking systems of urban rail vehicles and EMUs all adopt through-type electropneumatic braking systems, while rescue locomotives adopt automatic air braking systems. The two braking systems cannot be directly matched. [0003] At present, there are two situations in the rescue. One situation is that the braking system of the locomotive and the faulty train is not connected, and the braking function of the faulty train is cut off. In this case, due to the low braking force of the whole train, it can only be rescued slowly at a very low speed. l...

AI Technical Summary

Problems solved by technology

Another situation is that a conversion device is installed on the faulty train set to convert the air braking command of the locomotive into the electrical braking command of the faulty train set. In this case, the conversion device and the electropneumatic braking system of the faulty train set need to maintain power supply. If the faulty vehicle group cannot supply power, it cannot maintain a long distance only by relying on battery power supply, so it is not suitable for long-distance rescue

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