Train pipe low-pressure protection system and method applicable to locomotive braking system

Abstract

The invention discloses a train pipe low-pressure protection system and method applicable to a locomotive braking system, belonging to the field of locomotive braking systems, and aiming at solving the problems that precontrol pressure fluctuation is large, total wind consumption is high and energy is wasted when the traditional pressure limiting method is adopted and braking force of the locomotive is easy to attenuate. The train pipe low-voltage protection system disclosed by the invention comprises a pressure regulating valve, a two-position three-way pneumatic valve, an or gate shuttle valve, a fireless feedback safety valve, an operating valve and a volume chamber, wherein pressure of the volume chamber is only related to commonly pressure reduction of a train pipe, a channel used for controlling the operating valve is added by virtue of the pressure regulating valve, the two-position three-way pneumatic valve and the or gate shuttle valve, low pressure protection on the train pipe is realized by virtue of the added control channel, and control function of the braking system is improved. By adopting the train pipe low-pressure protection system and method disclosed by the invention, low pressure protection on the train pipe is realized, the problem that leakage is caused in a DK-1 braking system such as a distributing valve, a safety valve and the like is solved, and life cycle operating cost of a locomotive is saved.

Description

technical field [0001] The invention relates to the field of locomotive braking systems, in particular to a train pipe low-voltage protection system and protection method suitable for the locomotive braking system. Background technique [0002] At present, the braking system adopted by domestic main-line railway locomotives is mainly an automatic braking system, and DK-1 and JZ-7 braking systems are widely used. The DK-1 braking system is mainly used on trunk line electric locomotives, and the JZ-7 braking system is mainly used on trunk line diesel locomotives. [0003] These two brake systems have carried out corresponding protection designs for the train pipe decompression to 0kPa. Taking the DK-1 locomotive braking system as an example, when the train pipe decompression to 0kPa, according to the decompression rate of the train pipe Different, the distribution valve and emergency valve in the braking system produce different actions, and the brake cylinder of the locomoti...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems that the existing pressure limiting method makes the brake cylinder pre-control pressure fluctuate greatly, the total wind consumption is large, waste energy, and easily cause the attenuation of the braking force of the locomotive. Systematic train tube low pressure protection system and protection method, when the train tube pressure is lower than a certain value, the invention automatically fills the locomotive brake cylinder with air to realize the low pressure protection function of the train tube

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