JPH0747251Y2 - 3-wire track circuit - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a three-wire track circuit for detecting a narrow gauge train and a standard gauge train that run on a single rail in both non-electrified sections or non-electrified sections and electrified sections. is there.

[0002]

2. Description of the Related Art In non-electrified sections where trains run on narrow gauges and standard gauges respectively, or in non-electrified sections and electrified sections
As shown in, rail 1 is a common rail, a narrow gauge train runs on rails 1 and 2, and a standard gauge train runs on rails 1 and 3. In order to detect the train running on the narrow gauge and the train running on the standard gauge, two sets of track circuits sharing the rail 1 are used.

In order to prevent signal currents from interfering in the two sets of track circuits sharing the rail 1 as described above, for example, in the DC electrification section of the standard track, the track transformer 4 and the impedance bond 5 on the power transmission side are connected. Send out through 5
A commercial frequency track circuit is used in which a track current of 0 Hz is detected by the track relay 21 via the impedance bond 6 on the charging side. Further, in a narrow gauge non-electrified section where a diesel vehicle runs, a frequency divider 22 sends out a signal current of 25 Hz with the commercial frequency halved, for example, and this signal current is passed through a matching transformer 23 to a frequency divider 24. 50Hz doubled
And uses a frequency-divided orbit circuit to send to the orbit relay 25. In the figure, R ₁ , R ₂ and R ₃ are orbital resistors.

[0004]

However, the frequency-dividing track circuit using a special frequency as described above requires an expensive frequency conversion device such as a frequency divider or a frequency divider, and also the frequency divider. It was not easy to adjust and maintain the frequency divider and frequency divider.

In order to ensure safety and certainty,
Since a spare machine for each component of the commercial frequency track circuit and the frequency division track circuit is also required, the track circuit becomes expensive.

The present invention has been made to solve the above disadvantages, and an object thereof is to obtain a three-wire track circuit capable of reliably detecting a train running on narrow gauge and standard gauge with a simple structure. To do.

[0007]

A three-wire track circuit according to the present invention is a three-wire track circuit having one AC power supply provided on the power transmission side and two track relays provided on the power reception side. The track circuit is a three-wire track circuit that detects a train that runs on both the non-electrified section or the non-electrified section and the electrified section, sharing one rail of narrow gauge and standard gauge. and is intended to feed the rail to the signal current of the standard gauge, is connected to the narrow-gauge and standard gauge, the two orbital relay is intended to detect the train in response to a signal current of narrow gauge and standard gauge, respectively local coil And two orbit coils
Voltage applied to the local coil and the orbital coil
And a phase comparison relay that drives contacts by the phase difference between
The local coil of each orbital relay is connected to the local power supply.
Connected, the orbital coil of one orbital relay is connected to narrow gauge
The other orbital relay's orbital coil is connected to a standard gauge.
Applied to the track coil of a track relay connected to a standard track
Coil of orbital relay in which the voltage to be applied is connected in narrow gauge
180 degrees different in phase from the voltage applied to the
The voltage applied to the local coil of the continued orbit relay is narrow.
The voltage applied to the local coil of the track relay connected to the track.
It is characterized in that they are connected so that the pressure and the phase are different by 180 degrees .

[0008]

In the present invention, 1 is shared by the AC power supply.
It sends out signal currents of the same frequency to a narrow gauge and a standard gauge that have two rails. Connected to narrow gauge and standard gauge respectively
The gauge that detects the train by receiving the signal current of narrow gauge and standard gauge.
Road relay is a local coil connected to the local power source and the track side
Comprised of phase comparison relay with orbital coil connected to
And apply it to the orbital coil of the orbital relay connected to the standard gauge.
Coil of orbital relay in which the voltage to be applied is connected in narrow gauge
180 degrees different in phase from the voltage applied to the
The voltage applied to the local coil of the continued orbit relay is narrow.
The voltage applied to the local coil of the track relay connected to the track.
Connected so that the pressure and phase differ by 180 degrees, and connected to standard gauge
The orbital relay that was operated was connected to the narrow gauge with the phase difference operating
Narrow gauge and standard gauge row by changing the phase difference at which the orbit relay operates
Detects the presence of a car.

[0009]

1 is a block diagram showing an embodiment of the present invention. As shown in the figure, the narrow gauge which is the non-electrified section and the standard gauge which is the DC electrified section use the rail 1 as a common rail, the narrow gauge track circuit uses the rails 1 and 2, and the standard gauge track circuit uses the rail 1 And the rail 3 are used to form a 3-wire track circuit. One orbital transformer 4 is provided on the power transmission side of the three-wire type orbital circuit, and two orbital relays 7 and 8 are provided on the power receiving side.

The orbital transformer 4 sends out a signal wave of 50 Hz, and through the orbital resistor R ₁ and the impedance bond 5 so that a signal current in the direction shown by the arrow 9 is passed through the rails 1 and 3 of the standard rail. It is connected. Further, the track transformer 4 has a narrow gauge rail 1 so that the signal current flowing in the narrow gauge rails 1 and 2 flows in the same direction as the signal current flowing in the standard gauge in the rail 1 shared with the standard gauge as shown by an arrow 10. , 2 via an orbital resistor R ₂ .

The orbital relays 7 and 8 have local coils and
It has two coils, an orbital coil, a local coil and an orbital coil.
Contacts depending on the voltage applied to the coil and the phase difference between them.
It consists of driven phase comparison relays, and each orbital relay 7, 8
The local coil of the orbit relay 8 is connected to the local power supply.
The track coil contacts the narrow gauge rails 1 and 2 via the resistance R _3.
The track coil of track relay 7 is
It is connected to the standard gauge via the handwheel 6. And in FIG.
Connected to standard gauge as shown in the waveform diagram showing the phase relationship
The voltage applied to the track coil of the track relay 7 is
Applied to the track coil of the track relay 8 connected to the track
A track that is connected to a standard track with a voltage and phase difference of 180 degrees
The voltage applied to the local coil of the relay 7 is connected in a narrow gauge.
Voltage and phase applied to the local coil of the track relay 8
Are connected so that they differ by 180 degrees.

In the three-wire track circuit configured as described above, the signal current of the standard gauge and the signal current of the narrow gauge flowing in one rail 1 shared from the track transformer 4 provided on the power transmission side are in the same direction. Standard gauge rails 1, so that
A signal current of 50 Hz is sent to each of the rail 3 and the narrow rails 1 and 2. This signal current is applied to rails 1 and 3 and rails 1 and 3.
It is detected by the orbital relays 7 and 8 which are connected in different phases with respect to 2. On the other hand, the orbital relays 7 and 8 are supplied with the reference voltage of 50 Hz whose phase is changed according to the phase of the input signal current from the local power source. Therefore, the orbital relay 7 connects the impedance bonds 6 from the rails 1 and 3. When the signal current is sent through the rail relay 8, the track relay 8 is lifted when the signal current is sent from the rails 1 and 2. When the train running on the standard gauge enters the track circuit AT and short-circuits the rails 1 and 3, the track relay 7 falls and detects the train.
When a train running on a narrow gauge enters the track circuit AT and short-circuits rails 1 and 3, the track relay 7 falls and detects the train.

In this way, the signal currents of the commercial frequency are sent to the standard track circuit and the narrow track circuit in the same direction, and even if they are detected by the track relays 7 and 8 connected so that the operating phase differences are different. , The operation of the orbital relays 7 and 8
A train traveling on the standard gauge and narrow-gauge Ri can be detected clearly distinguished.

When the train is detected by the standard gauge and the narrow gauge, the leakage current of the narrow gauge signal current to the same track of the standard gauge becomes extremely small because the impedances of the impedance bonds 5 and 6 are higher than the rail impedance. Further, the leakage current of the standard gauge signal current to the narrow gauge track circuit becomes small when the resistances of the narrow gauge track circuits R ₂ and R ₃ are made larger than the resistance of the standard gauge track resistor R _1. , Trains can be detected with almost no mutual influence of leakage current.

In addition, due to some reason, a large amount of leakage current from the narrow gauge track circuit may flow into the track relay 7, or a large amount of leakage current from the standard track circuit to the track relay 8. But orbit relay 7 and orbit relay 8
The phase of the signal current and the leakage current applied to the
0 degree cancel each other from Kotonariru, orbit relay 7,
8 can be dropped to ensure safety.

Further, the rails 1 and 3 constituting the standard gauge track circuit and the rails 1 and 2 constituting the narrow gauge track circuit are broken, and a cable for connecting the track transformer 4 and the track relays 7 and 8 to the rails and the like. Even if the wire is broken or the rail insulation is short-circuited, the orbit relays 7 and 8 fall and the safety can be ensured.

Incidentally, the track circuits adjacent to each other can ensure safety by connecting the track relays 7 and 8 so that the polarities thereof are different from each other as in the conventional case.

In the above embodiment, the case where the standard gauge signal current and the narrow gauge signal current flowing in the shared rail 1 are sent out so as to flow in the same direction has been described. However, as shown in FIG. Even when the standard gauge signal current and the narrow gauge signal current flowing through the rail 1 of the book are sent so as to flow in different directions, the same operation as in the above-described embodiment can be achieved.

In the above embodiment, the case where the rail 1 is a common rail with a narrow gauge which is a non-electrified section and a standard gauge which is a DC electrified section has been described, but the same applies to the case where the standard gauge is an AC electrified section. can do.

[0020]

As described above, the present invention sends a signal current of the same frequency to each of a narrow gauge and a standard gauge which have one rail shared by an AC power source, and outputs the narrow gauge and the standard gauge.
Orbital relays that are connected to each other and operate with different phase differences
Since the signal current is detected by, it is possible to reliably detect the presence or absence of a train running on narrow gauge and standard gauge with a simple configuration.

Further, since the equipment used for the track circuit can be simplified, the track circuit as a whole can be formed at low cost, and maintenance and inspection can be facilitated.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a configuration diagram showing another embodiment.

FIG. 3 is a configuration diagram showing a conventional example.

FIG. 4 shows a phase relationship of voltages applied to an orbital relay .
It is a waveform diagram.

[Explanation of symbols]

 1,2,3 Rail 4 Orbital transformer 5,6 Impedance bond 7,8 Orbital relay

Claims (1)

[Scope of utility model registration request] 1. An AC power supply provided on the power transmission side,
A 3-wire type track circuit having two track relays provided on the power receiving side, wherein the 3-wire type track circuit uses a single rail of narrow gauge and standard gauge in the non-electrified section or in the non-electrified section and the electrified section. It detects a train that runs in common, the AC power supply sends a signal current to narrow gauge and standard gauge rails, and is connected to narrow gauge and standard gauge respectively, and two track relays are narrow gauge and standard gauge. It detects the train by receiving the signal current of 2 trains, each of which is a local coil and a track coil.
Has a coil and is applied to the local coil and the orbital coil
Phase comparison driving contacts by voltage and phase difference between them
Each orbital relay has a local coil
Connected to the source, the orbital coil of one orbital relay is narrow gauge
Connected, and the orbital coil of the other orbital relay is connected to standard
To the orbital coil of the orbital relay connected to the standard rail
The orbit relay of an orbit relay whose applied voltage is connected in a narrow gauge
The voltage applied to the coil is 180 degrees out of phase with the standard
The voltage applied to the local coil of the track relay connected to the track.
Pressure is applied to the local coil of an orbital relay connected in a narrow gauge.
A three-wire track circuit, which is connected so that the voltage and the phase are 180 degrees different .