Rapid brake and relieve device and method of parking brake cylinder of fireless loopback locomotive

Abstract

The invention discloses a rapid brake and relieve device and method of a parking brake cylinder of a fireless loopback locomotive. The parking brake cylinder 10 is connected with one end of a reverse valve 4 through a cock 5 of the parking brake cylinder 10. The other two ends of the reverse valve 4 are connected with a brake 9 and the end a of a bidirectional solenoid valve 3 respectively. The end p of the bidirectional solenoid valve 3 is connected with an air storage cylinder 2 and is further connected with a check valve 1 of a main air cylinder 8. A train pipe 7 is connected with the end p of the bidirectional solenoid valve 3 through a check valve 6 of the train pipe 7. The method includes the step of parking braking, wherein a parking braking action button of a fireless locomotive cab is operated, a port a of the bidirectional solenoid valve 3 is controlled to be communicated with a port 0, compressed air of the parking brake cylinder 10 is exhausted to the atmosphere, and then the parking brake cylinder 10 is at the action state; the step of fireless loopback, wherein the train pipe 7 is communicated with the fireless locomotive, a parking braking relieve button of the fireless locomotive cab is operated, a port p of the bidirectional solenoid valve 3 is controlled to be communicated with the port a, sustained pressure of the train pipe 7 is injected into the parking brake cylinder 10, and then the parking brake cylinder is relieved.

Description

technical field [0001] The invention relates to a device and method for quickly braking and relieving a parking brake cylinder of a fire-free return locomotive, and belongs to the technical field of railway locomotives. Background technique [0002] In railway operation, it is sometimes necessary to carry out fire-free return of the locomotive, that is, the locomotive has no power and is pulled by other powered locomotives. [0003] There is generally a parking brake cylinder on the locomotive, and the pressure is provided by the main air cylinder of the locomotive. When the pressure of the parking brake cylinder is always greater than 450kPa, the parking brake is in a relaxed state, that is, the wheels can rotate; when there is no pressure in the parking brake cylinder, the parking brake is in an active state, that is, the wheels cannot rotate. At this time, if you want the wheels to resume rotation, one method is to continuously provide a pressure greater than 450kPa to t...

AI Technical Summary

Problems solved by technology

When the running time is short, the wheels and rails will be scratched; if the running time is long, the locomotive will be derailed

[0009] As for the release operation, if the crew does not pull enough or pulls for insufficient time, the parking brake cylinder will not be completely released, and the wheels will still be in a locked state.

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