RU2732645C1 - Rail track condition monitoring method - Google Patents

Abstract

FIELD: railway vehicles.

SUBSTANCE: invention relates to the field of railway automatics for monitoring conditions of rail lines. In method, signal to rail line is supplied from the middle, rails of transfer curves are shunted by capacitor, which together with rails forms parallel oscillatory circuit - filter-plug at increased frequency of signal current 2000–4000 Hz, oscillatory circuit is equipped with a capacitor, in parallel to which are connected in series connected sections of rail - conversion curves, wherein feed of track line is carried out from points of connection to rails of capacitor, to ends of branches resistors are connected to control integrity of rails of branches, wherein in violation of integrity of rails of one of the branches or imposing a train shunt, resonance conditions of the oscillatory circuit are violated, which shunts the rail line and disconnects the track relay, wherein application of train shunt to section of track in front of rail switches points also leads to deactivation of track relay.

EFFECT: higher reliability of monitoring conditions of track lines.

1 cl, 2 dwg

Description

The technical field to which the invention relates

The invention relates to the field of railway automation and can be used to regulate the movement of trains at the station.

State of the art

There is a known method for monitoring the states of a rail line, which consists in the fact that to monitor the states of a branched rail line, a signal is supplied to it from its middle, reducing the zones of preliminary and additional shunting. Monitoring the employment of the rail line with switching after the release of the approach section or with the occupation of the second track after the signal, the train signals are recorded, which are displaced against the train travel at a distance corresponding to the preliminary shunting zone [Patent RU No. 2581277. A method for monitoring the vacancy of a rail line by the author Polevoy Yu.I.].

The disadvantage of this method is that it has a sufficiently large pre-shunting zone, and also requires the use of voltage surge control devices, insulating joints on transfer curves and on ramps due to the small length of ramps.

There is a known method for monitoring the states of a rail line, which consists in the fact that the signal is fed to the rail line from its middle to reduce the zone of preliminary and additional shunting, while the input resistance of the receiving ends is reduced to a minimum (for example, to 0.03 Ohm), the rails of the conversion curves are shunted by capacitors, which, together with the rails, form oscillatory circuits - filter-plugs, increase the frequency of the signal current to 2000-4000 Hz, which is necessary for the operation of the oscillatory circuits and reducing the pre-shunting zone at the rails [RF Patent No. 2333126 Method for monitoring the states of the rail line of the authors Yu.I., Gorelika A.V., Mukhina L.V., publ. 04/27/2018, BI No. 12].

The disadvantage of this method is that a large number of connectors and path receivers are required per switch.

This technical solution was chosen as a prototype.

Disclosure of invention

The technical result is to increase the reliability of work by reducing the length of the floor connectors and the number of track receivers per arrow.

The technical result is achieved by the fact that the signal is fed into the rail line from its middle, the rails of the transfer curves are shunted by a capacitor, which together with the rails form a parallel oscillatory circuit - a filter-plug, and the signal current frequency is increased to 2000-4000 Hz. In this case, the oscillatory circuit is equipped with a capacitor, in parallel with which the series-connected rail sections are connected - transfer curves, the rail line is powered from the points of connection to the capacitor rails, resistors are connected to the ends of the branches to ensure the integrity of the branch rails. In case of violation of the integrity of the rail of one of the branches or the imposition of a train shunt, the resonance conditions of the oscillatory circuit are violated, which shunts the rail line and de-energizes the travel relay. The imposition of a train shunt on the track section in front of the rail blades also de-energizes the travel relay.

Brief Description of Drawings

FIG. 1 shows a diagram of a branched track circuit, FIG. 2 shows a block diagram of a branched track circuit.

Implementation of the invention

FIG. 1 and 2 show the following designations:

1, 2, 3, 4, 5, 6, 7 and 8 - rail sections, rail sections 3 and 4 are the first and second conversion curve;

9, 10, 11, 12, 13 and 14 - insulating joints;

15 - capacitor;

16 - the first resistor R ₁ ;

17 - the second resistor R ₂ ;

18 - the first transformer box 1ТЯ;

19 - relay transformer;

20 - the second transformer box 2ТЯ;

21 - supply transformer;

22 - limiting resistor R ₀ ;

23 - post of electrical interlocking;

24 - track receiver PP;

25 - travel relay P;

26 - the first fuse 1PR;

27 - second fuse 2PR;

28 - track generator.

FIG. 1 shows a rail circuit with a resonant circuit. It depicts sections of rail 1, 2, 3, 4, 5, 6, 7 and 8; insulating joints 9, 10, 11, 12, 13 and 14; capacitor 15 first and second resistors 16 and 17 (Fig. 1 and 2). The current from the first terminal of the track generator 28 through the first fuse 26, the primary winding of the track transformer 21, the second fuse 27 flows to the second terminal of the track generator 28. Power is supplied to the rail line approximately in the middle of the rail line. A parallel oscillatory circuit is included in the secondary winding circuit of the travel transformer 21, one branch of which contains a capacitor C 15, the second branch contains serial connected rail segments 3 and 4. These segments are conversion curves and represent inductive circuit elements. To the junction of these segments (the cross, the middle point of the inductance element), segments of the rail threads are connected - the continuation of the branched rail circuit. From the secondary winding of the supply transformer through a resistor 22, voltage is applied to an oscillatory circuit consisting of a capacitor 15 and sections of rails 3 and 4 (conversion curves), the secondary winding of a relay transformer 19 and a series-connected circuit with resistors 16 and 17. These resistors allow ensuring the integrity of the rail branch threads. The midpoint A between the rail segments 3 and 4 is connected to the midpoint B between the resistors 16 and 17 (Fig. 2). With a free and serviceable rail line, the potentials of points A and B are the same, and no current flows between them. From the secondary winding of the relay transformer 19, current flows from the induced EMF to the input of the track receiver 24, from the output of which the current flows through the winding of the track relay 25. The frequency of the track generator corresponds to the resonant frequency of the oscillatory circuit (positions 15, 3 and 4), therefore the input resistance of the oscillating circuit large enough and no current flows through it. Relay 25 is energized. Through the resistors 16 and 17, current flows from the secondary winding of the supply transformer 21. When a train enters or the integrity of the rail sections of one of the branches is violated, as well as the imposition of a shunt on one of the branches, one of the resistors 16 or 17 and one of the rail segments 3 or 4 are shunted. In this case, the resonance of the oscillatory circuit is disturbed, which shunts the sections of rail 1 and 2. The track relay 25 is de-energized. When a train shunt is imposed between sections of rail 1 and 2, the trip relay is also de-energized.

The track circuit devices are located at the EC 23 post and in the transformer boxes 18 and 20.

Claims (1)

A method for monitoring the states of a rail line, which consists in the fact that the signal is fed to the rail line from the middle, the rails of the transfer curves are shunted by a capacitor, which, together with the rails, forms a parallel oscillatory circuit - a filter-plug at an increased frequency of the signal current up to 2000-4000 Hz, characterized by the fact that the oscillating circuit is supplied with a capacitor, in parallel with which the series-connected sections of the rail are connected - transfer curves, while the power of the rail line is carried out from the points of connection to the rails of the capacitor, resistors are connected to the ends of the branches to ensure control of the integrity of the branch rails, and if the integrity of the rail of one from the branches or the imposition of a train shunt, the resonance conditions of the oscillating circuit are violated, which shunts the rail line and de-energizes the track relay, while the imposition of the train shunt on the track section in front of the rail wagging also leads to de-energization of the track relay.

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