Emergency braking and rheostatic braking combined control device for locomotive brake

Abstract

The invention discloses an emergency braking and rheostatic braking combined control device for a locomotive brake. The device comprises a logic circuit used for automatically cutting off locomotive traction and rheostatic braking after emergency braking, a logic circuit used for re-performing rheostatic braking after emergency braking and automatic cutoff of rheostatic braking and a logic circuit used for automatically judging whether to cut off intrinsic air braking of the locomotive or not according to rheostatic braking force. Safety reliability of the locomotive in emergency can be improved by the emergency braking and rheostatic braking combined control device. A function of automatic cutoff of locomotive traction and rheostatic braking after emergency braking of the locomotive is realized; a function of reapplying rheostatic braking force according to needs after emergency braking and automatic cutoff of rheostatic braking; wheel locking of the locomotive caused by superposition of rheostatic braking during re-performing of rheostatic braking after emergency braking is prevented; and automatic recovery of intrinsic air braking force of the locomotive can be guaranteed once rheostatic braking fails.

Description

technical field [0001] The invention relates to the field of locomotive manufacturing, in particular to a combined control device for emergency braking and resistance braking of a locomotive brake. Background technique [0002] Existing non-electronically controlled locomotive brakes, such as JZ-7 locomotive brakes still have a large number of locomotives and market demand. This type of locomotive mainly adopts the following two technologies during emergency braking Program: [0003] The first solution of the prior art is to use the resistance braking interlock valve in the JZ-7 brake machine to connect with the control signal of the locomotive resistance braking. When the locomotive implements resistance braking, the resistance braking interlock valve is energized. The JZ-7 brake will cut off the air braking force of the locomotive itself. [0004] The shutdown signal of the train operation monitoring method is connected with the locomotive loading signal, and when the t...

AI Technical Summary

Problems solved by technology

[0006] (1) The function of automatically cutting off resistance braking after emergency braking is realized by the stop signal controlled by the train operation monitoring device, but a large number of locomotives equipped with JZ-7 brakes, especially off-road locomotives, are not equipped with train operation monitoring devices of

[0007] ⑵After emergency braking, the locomotive resistance braking is automatically cut off, and it cannot be restored during emergency braking

[0011] ⑴When the locomotive is in the resistance braking condition, if the resistance braking force is large, once the emergency braking is implemented, the superimposed effect of the two braking forces may cause the wheels of the locomotive to lock

At present, the locomotives that realize this function mainly rely on the joint control of electronically controlled brakes with high cost and on-board microcomputers, but these methods have been modified on some locomotives that have been used in large quantities, such as locomotives equipped with JZ-7 brakes Due to the limitation of vehicle structure, on the one hand, it is very difficult technically, and on the other hand, the economic benefits are not high. Therefore, it is very urgent to carry out limited transformation on the basis of the existing structure to meet the safety requirements of the locomotive under emergency conditions. Require

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