Flexible guide structure of railway vehicle emergency valve

Abstract

The invention provides a flexible guide structure of a railway vehicle emergency valve. The emergency valve comprises an emergency piston assembly, an emergency piston rod, an emergency valve seat and a sandwich valve, the emergency piston assembly, the emergency piston rod, the emergency valve seat and the sandwich valve are arranged in the valve body, one end of the emergency piston rod penetrates through a guide hole of the emergency valve seat, the sandwich valve is arranged at a valve port of the emergency valve seat, the flexible guide structure is arranged in the guide hole of the emergency valve seat and used for supporting the emergency piston rod, and the emergency piston rod makes contact with the flexible guide structure all the time in the action process, so that rigid guide of the emergency piston rod in the guide hole of the emergency valve seat is converted into flexible guide. Hard abrasion between the emergency piston rod and the emergency valve seat is avoided, the emergency braking effect that the emergency piston rod is driven by the emergency piston assembly to eject the sandwich valve open is more reliable, eccentric abrasion of the emergency piston rod is avoided, it can be guaranteed that the emergency piston rod resets after emergency braking, and the action stability of the emergency valve is improved.

Description

technical field [0001] The invention belongs to the field of emergency valves for railway vehicles, in particular to a flexible guide structure for emergency valves for railway vehicles. Background technique [0002] After the emergency valve of the existing railway vehicle has been used for a period of time, the train pipe cannot be filled with compressed air after the emergency brake occasionally occurs during the train test and operation, which leads to the failure of the normal departure of the railway train. The reason is that the emergency valve of the existing railway vehicle The emergency piston rod and the emergency valve seat of the valve are in rigid contact and hard wear, which may cause partial wear of the emergency piston rod and the emergency valve seat, affecting the stability of the emergency valve. Some emergency piston rods with serious eccentric wear cannot be reset even after emergency braking, so that the train pipes cannot be filled with compressed air...

AI Technical Summary

Problems solved by technology

[0002] After the emergency valve of the existing railway vehicle has been used for a period of time, the train pipe cannot be filled with compressed air after the emergency brake occasionally occurs during the train test and operation, which leads to the failure of the normal departure of the railway train. The reason is that the existing railway vehicle emergency The emergency piston rod and the emergency valve seat of the valve are in rigid contact and hard wear, which may cause partial wear of the emergency piston rod and the emergency valve seat, affecting the stability of the emergency valve.

Some emergency piston rods with severe eccentric wear cannot be reset even after emergency braking, so that the train pipe cannot be filled with compressed air after emergency braking, resulting in the failure of the normal departure of the railway train and affecting the order of railway transportation

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