Method for overcoming poor shunting of track circuit

Abstract

The invention provides a method capable of effectively overcoming poor shunting of a track circuit, aiming at the defect that poor shunting of the track circuit can not be effectively overcome after once-for-all adjustment is conducted according to Railway Signal Maintenance Rules in the prior art. The method comprises the steps of: 1) under the condition that the output voltage of a track power supply transformer at a feed end is kept unchanged, measuring a corresponding relationship between the transformation ratio of a relay transformer in a track at a receiving end and the secondary voltage of the relay transformer in the track at the receiving end; 2) determining a to-be-expected transformation ratio of the relay transformer in the track at the receiving end according to the corresponding relationship; and 3) adjusting the transformation ratio of the relay transformer in the track at the receiving end to the determined to-be-expected value.

Description

Technical field [0001] The invention relates to the field of railways, in particular to a method for overcoming the poor shunting of track circuits. Background technique [0002] Currently, track circuits are generally used in China to detect the occupancy of train track sections. Generally, the existing track circuit can be divided into the power transmitting terminal, the power receiving terminal with a choke transformer, and the power transmitting terminal and the power receiving terminal without choke according to whether the power transmitting terminal and the power receiving terminal are equipped with a choke transformer. There are two types of current transformers; according to the setting of the receiving end, it can be divided into three types of track circuits: one sending and one receiving, one sending and two receiving, and one sending and three receiving. [0003] figure 1 It is a typical circuit diagram of a 25Hz phase sensitive track circuit with a choke transformer...

AI Technical Summary

Problems solved by technology

[0004] For the existing track circuit, due to the formation of a rust layer on the rail surface in the track circuit section where the train does not normally travel, the contact resistance between the wheelset and the rail increases when the train passes through the section, and the track circuit The voltage drop is small, and the track relay cannot be reliably dropped, resulting in poor track circuit shunting, destroying the signal interlocking relationship, and burying a major safety hazard for inducing a train accident

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