A locomotive and its air-controlled backup brake control system

Abstract

The invention discloses an air-controlled backup brake control system for a locomotive, which includes a backup brake valve, an equalizing air cylinder, a relay valve, an air-controlled cut-off valve and a conversion plug; the input port of the backup brake valve and the connection of the conversion plug The first end is connected, its output port is connected with the air port of the equalizing air cylinder, its air port is connected with the pre-control port of the relay valve and the first end of the conversion plug door, and its second end is connected with the main air pipe; the relay valve’s The air source port is connected with the main air pipe, its output port is connected with the air control cut-off valve air inlet port, its air outlet port is connected with the train pipe, and its control port is connected with the first end of the conversion plug door; when the conversion plug door is opened, Its first end is connected to the second end, otherwise the first end is connected to the outside world; when the control port of the air control shut-off valve has a preset air pressure, its air inlet and air outlet are connected, otherwise it is cut off. The invention makes the balanced air cylinder in the pressure relief state under normal conditions, thus ensuring that the locomotive has a stable braking effect when performing pure air backup braking, and avoids relief.

Description

technical field [0001] The invention relates to the technical field of locomotive braking, in particular to an air-controlled backup braking control system of a locomotive. The present invention also relates to a locomotive comprising the above air-operated backup brake control system. Background technique [0002] With the development of rail transit in China, more and more rail locomotives have been widely used. [0003] A locomotive is a self-propelled vehicle that pulls or pushes railway vehicles and does not carry a commercial load. The locomotive uses the power generated by steam engine, diesel engine, traction motor or other power machinery, and drives the driving wheel (drive wheel) through the locomotive transmission device, and generates driving force by means of the adhesion between the driving wheel and the rail, that is, the traction force of the locomotive. The traction generated by the locomotive overcomes the resistance of the train and can drag a train tha...

AI Technical Summary

Problems solved by technology

[0005] However, this method has a certain safety risk, that is, after the conversion, if there is wind pressure in the backup equalization air cylinder, it will cause the wind pressure of the train pipe to rise, causing the train to ease and the braking effect to be released unexpectedly.

Therefore, when switching, the driver must be required to take the initiative to put the backup brake valve in the braking position first, and then perform the switching of the switching plug after the pressure of the equalizing air cylinder is exhausted, but this undoubtedly increases the operating requirements for the driver, and In an emergency, the driver's response ability may not be able to keep up, and at the same time, there is not enough time for the driver to discharge the pressure of the equalizing air cylinder step by step, and then perform the operation of switching the plug

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