SU115932A1 - The device is a continuous track circuit autolock - Google Patents

Description

The proposed device of a continuous track circuit of an automatic blocking does not have insulating joints on its borders.

The known devices of continuous track auto-lock circuits are intended only for ensuring the operation of locomotive signaling.

In order to expand the use of continuous rail circuits and use them not only for the purposes of locomotive signaling, but also for automatic blocking with open-loop signals, receiving devices are provided in the rail circuits for both the input end of the rail circuit and the output with corresponding track relays.

The drawing schematically shows a circuit diagram of a track circuit for automatic interlocking without insulating joints.

The track circuit device consists of the following main parts: power supply - frequency generator 1, sending a current of two frequencies {f or / 2) into the track circuit; receiving devices for the input 2 end of the track circuit and the output sZ with the corresponding track relays 4 and 5; receiving track inductors and 7 and relay transformers S and 9, installed at the boundaries of the track circuit.

Receivers of the input and output ends of the track circuit contain amplifiers 10 to 11 and protective devices 12 and 13. Amplifiers have two inputs each and two; Connect them to the rails via relay transformers S and 5 (input one) and to the receiving inductor coils 6 7 (second input) - The protective device has two resonant circuits; one is tuned to voltage resonance, the other to TOICOB resonance.

Parallel to the circuit tuned to the voltage resonance, the protective relay ZR is turned on.

The receiving device at the output 5 end of the track circuit, in addition, contains an additional circuit in the amplifier and an additional

D 115932-2 -

protective device 14, tuned to the second, higher frequency / 2 generator / .;

In the absence of near this rail section of trains, track relays 4 W. 5 as. both the input end and the output end are under the current of the same frequency i. When the train approaches the beginning of the track circuit, the voltage at the input of the sxi amplifier 10 is close to zero, however, the track relay 4 receives power. This is achieved by the fact that the alternating current passing under the pick-up rollers from the generator 1 induces an electromotive force in the pick-up coils 6, as a result of which the voltage at the input 2 of the amplifier 10 is sufficient to hold the track relay core 4.

When the train passes through the take-up coils, both the input I and input AK2 of amplifier 10 are shunted and the track relay 4 releases its measles.

When the train passes behind the generator, the receiving device is also bypassed at the output 3 end of the track circuit. The path relay 5 of this end also releases the measles. In this case, the relay 5 with its front contact (not shown in the diagram) changes the frequency (s) coming from the generator / to a higher frequency / 2, from which the receiving device at the input 2 cannot reach the end of the rail circuit and the track relay 4 is still de-energized .

When the whole rolling stock passes through the receiving coils 7 of the output end, the track relay 5 at the output end receives power from the generator /, the increased frequency / g and, having triggered, switches the generator to feed the normal frequency from the rail circuit 4 at the input end, and the circuit comes to its original position.

In order to protect against the influence of the currents of the adjacent rail circuits, their frequency is different.

The protection device 14 is introduced to prevent the trip relay from responding to the frequencies of other block sections, or from interfering with the disturbance of the resonant tuning of the receiving amplifier.

When a amplifier appears at the output of frequencies that do not correspond to the frequency of the given rail circuit on a circuit tuned to voltage resonance, the voltage from which the closed relay ZR operates opens, which opens the track relay circuit.

Subject invention

The device is a continuous track circuit with an automatic blocking signal, characterized in that, in order to create stable iB operation of the track circuits, it uses a frequency generator as a power source, and an amplifier tuned to the first main frequency as a power source generator with outputs to the rails through a relay transformer and receiving track coils, and a protective device with resonant circuits, and to the output receiver, similar to the input one, a circuit is added to preamplifier and a security device configured for a second, higher frequency of the oscillator.