Locomotive and air-controlled backup brake control system thereof

Abstract

The invention discloses a locomotive and an air-controlled backup brake control system thereof. The air-controlled backup brake control system comprises a backup brake valve, a balancing air cylinder, a relay valve, an air-controlled shut-off valve and a cut-out cock, wherein an input opening of the backup brake valve communicates with the first end of the cut-out cock, and an output opening of the backup brake valve communicates with an air opening of the balancing air cylinder; the air opening of the balancing air cylinder and a pre-control opening of the relay valve communicate with the first end of the cut-out cock; and the second end of the cut-out cock communicates with a main air pipe; an air source opening of the relay valve communicates with the main air pipe, and an outlet opening of the relay valve communicates with an air inlet of the air-controlled shut-off valve; the air outlet of the air-controlled shut-off valve communicates with a train pipe, and a control opening of the air-controlled shut-off valve communicates with the first end of the cut-out cock; when the cut-out cock is opened, the first end and the second end of the cut-out cock are communicated, or else, the first end communicates with the outside; and when a preset atmospheric pressure is generated at the control opening of the air-controlled shut-off valve, the air inlet and the air outlet of the air-controlled shut-off valve are in communication, or else, the air inlet and the air outlet of the air-controlled shut-off valve are not in communication. According to the air-controlled backup brake control system disclosed by the invention, when being under an ordinary condition, the balancing air cylinder is under a decompression condition, so that the situation that when pure air backup braking is performed, the locomotive has a stable braking effect is guaranteed, and the relieving situation is avoided.

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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