RU1791248C - Decoder for a track circuit - Google Patents

Abstract

Usage: in control devices free ™ and serviceability of track sections. SUMMARY OF THE INVENTION: the device comprises a latching relay made with two series-connected windings, each of which is shunted by diodes, and a pulse track relay. 1 ill.

Description

 The invention relates to the field of railway automation and telemechanics, in particular to devices for monitoring the freedom and serviceability of track sections.

A relay decoder, two repeaters and a trip relay are known. The disadvantage of this decoder is the pulsed mode of operation and a large number of relays.

Also known is a decoder adopted as a prototype, comprising a pulse-pu4 relay contact, a two-winding latching relay, which is bridged by two diodes and connected through two resistors to the pole of the power source.

A disadvantage of the known decoder is the presence of two damping resistors, through one of which a sufficiently large current flows.

The purpose of the invention is to increase reliability.

This goal is achieved by the fact that the decoder for the rail circuit, containing a double-winding clamping relay, the windings of which are shunted by diodes, while from the terminals of the first winding through the front contact of the pulse-track relay is connected to one of the poles of the power source, and the other terminal is connected to the first terminal of the second windings of the latching relay, according to the invention, the second terminal of the second winding of the latching relay is connected to the midpoint of the power source, and the first terminal of the first winding through the rear contact of the pulse tevogo relay is connected to the other pole of the power supply.

A comparative analysis with the prototype shows that the claimed device is distinguished by the presence of a midpoint at the power source and the absence of resistors.

A comparison of the claimed solution with other technical solutions shows that there are no resistors in the decoder and the latching relay switching circuit has been replaced. At the same time, new properties are manifested: the reliability of the decoder is increased and the energy consumption is reduced.

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The drawing shows a diagram of a decoder.

The decoder for the rail circuit contains two series-connected windings of the clamping relay 1, each of which is bridged by a diode 2 and 3, which are connected between the pole of the midpoint of the power supply 4 and the common contact of the pulse-track relay 5, the front contact of which is connected to the plus pole of the power supply 6 , and the rear - to the minus pole 7 of the same source.

The device operates as follows.

In the initial state, there are no impulse signals in the rail circuit, and pin 5 closes the rear circuit. In this case, the current from pole 4 (midpoint) through the lower winding of relay 1, diode 2 and the rear contact of relay 5 flows to the negative pole 7.

Upon receipt of pulse signals, the contact of the pulse-track relay alternately closes the circuit of the lower and upper relay windings. The lower winding circuit has been brought in, and the upper circuit is created from the plus pole of the power supply 6, through the front contact 5, the upper winding of relay 1, diode 3 to the midpoint 4 of the power supply. Diodes 2 and 3 provide not only current paths for each of the windings (due to diode 2, the bottom circuit is created, and to diode 3, the circuit of the upper windings), but also the circulation of extra currents. After deenergizing the pulse-track relay, the lower winding circuit of relay 1 is created, and the current from the self-induction emf of the upper one circulates through the upper winding of the same relay and through diode 2

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windings. After the pulse-track relay is energized and its front contact 5 is closed, current flows from the upper winding of relay 1, and a self-induction current is circulated through the lower winding and through diode 3. Thanks to the flow of current over both windings, the Latching Relay type PLZ 600/600 (relay remade from PLZM 600/1300) becomes current.

The decoder circuit eliminates core retention during open circuits, any damage to the diodes, continuous feeding of the rail line with direct or alternating current, and sintering of the contacts of the pulse-track relay.

Analysis of the proposed device shows that the operation of the decoder is more reliable (due to the reduction of circuit elements) and consumes less energy.

Claims (1)

The claims Rail chain decoder containing double winding retainer a relay whose windings are shunted by diodes, while one of the terminals of the first winding is connected to one of the poles of the power source through a front contact, and the other terminal is connected to the first the output of the second winding of the latching relay, characterized in that, in order to increase reliability, the second output of the second winding of the latching relay is connected to the midpoint of the power supply, and the first output of the first winding through the rear contact of the pulse track relay is connected to the other pole of the power supply.