Railway vehicle and parking brake relieving system thereof

Abstract

The invention discloses a parking brake relieving system of a railway vehicle. A parking braking check valve is arranged between a brake air cylinder and a parking brake control pulse valve; a normally open first cutout cock is arranged in the middle of an air path of an air suspension air cylinder towards a height valve and an air spring, and a pipeline leads out of the position between the air suspension air cylinder and the first cutout cock and is connected to the position between the parking brake check valve and the parking brake control pulse valve through a normally closed second cutout cock; after air pressure in the vehicle decreases to a certain value and parking brake is carried out automatically, a worker can introduce compressed air in the air suspension air cylinder into a brake by operating an on position and an off position of each cutout cock, and therefore parking brake of the brake is relieved. The parking brake relieving system of the railway vehicle can relieve parking brake of the vehicle by using the compressed air stored in the air suspension air cylinder on the vehicle when the vehicle has no power, relieve labor intensity of workers and bring convenience to operation and maintenance of the vehicle.

Description

technical field [0001] The invention relates to the technical field of rail vehicles, in particular to a rail vehicle and its parking relief braking system. Background technique [0002] At present, most domestic rail transit vehicles use air brake systems, and for safety reasons, they all have parking brake functions. Generally, a brake with parking braking function is installed on each axle. The brakes with parking braking function on the two axles of the same bogie are arranged diagonally. The parking braking relief method is as follows: [0003] 1. When the rail transit vehicle is powered on, all the parking brakes of the entire train can be relieved by pressing the parking brake release button in the cab to send a release command electric signal to the parking brake pulse valve B19 of each vehicle. [0004] 2. When the rail vehicle is without electricity, the air compressor stops working, and the air pressure of the vehicle air pipeline is continuously reduced due to a...

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Problems solved by technology

[0008] Therefore, when the vehicle has no electricity, the parking brake can only be released manually through mechanical operation outside the vehicle, which requires a lot of labor intensity for the staff. At the same time, there may be problems such as the small space of the vehicle parking area to release the parking brake on the outside of the vehicle. Difficult or impossible braking problems

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