JP2829598B2 - Three-wire track circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-wire track circuit for detecting a train on a three-wire rail, and more particularly to detection of a broken rail.

[0002]

2. Description of the Related Art As means for running a conventional line train and a Shinkansen train in a common line section, three rails, a common rail, a standard rail dedicated rail, and a narrow gauge dedicated rail, are used. The Shinkansen trains use three-track rails that run using common rails and standard gauge rails.

[0003] In the case of using three-wire rails, trains are detected in a normal state in which there is no contact between the common rail and the standard rail dedicated rail and between the common rail and the narrow gauge dedicated rail.
This is performed by configuring a three-wire track circuit that displays a stop signal as a train even if any one of the rails is short-circuited.

In a three-wire track circuit, it is necessary to detect a short circuit caused by a train between the common rail and the standard rail dedicated rail and between the common rail and the narrow gauge dedicated rail. Therefore, for example, as shown in FIG. 2, the standard-rail dedicated rail 2 and the narrow-gauge dedicated rail 3 are connected by jumper wires 4a to 4n, and a train is detected by regarding the rail as one rail.

[0005] In this case, the operation of the track circuit is the same as that of the conventional two-wire track circuit. When a train does not exist on the track circuit, the return current is changed from the neutral point N2 to the connection points S21 and S22 and the connection points S11 and S11. It flows to the neutral point N1 via S12, and similarly flows to the substation.

When the Shinkansen train 5 enters the track circuit and the common rail 1 and the standard rail 2 are short-circuited by the wheels 6 and the axle 7, the signal current does not reach the receiver R2. It detects that the train 5 is on the train.

When the Shinkansen train 5 passes through the transmission-side impedance bond ZB ₁₁ , the signal current from the transmitter T 1 becomes, for example, the transmission-side impedance bond ZB _11.
And via a reception side impedance bond ZB ₂₂ transmitted to the receiver R2, the receiver R2 is receiving the signal current to detect a no train (absence lines).

[0008]

However, since the rail dedicated to the standard gauge and the rail dedicated to the narrow gauge are electrically integrated into one, the signal current of the train detection signal does not reach the receiver when the common rail is broken. Therefore, it is possible to detect a rail break, but even if either the standard rail dedicated rail or the narrow gauge dedicated rail breaks, either the standard rail dedicated rail or the narrow gauge dedicated rail is connected, Since the train detection signal arrives at the container, the rail break cannot be detected.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned disadvantages, and has as its object to detect the presence or absence of a train and the breakage of a standard gauge rail and a narrow gauge rail using a device having a simple configuration. .

[0010]

A three-wire track circuit according to the present invention includes one impedance bond at each of a boundary between a train detection signal transmitting side and a train detection signal receiving side of the three-wire track circuit, A transmitter is provided as a train detection signal transmitter, and a receiver, a standard gauge signal current detector, and a narrow gauge signal current detector are provided as train detection signal receivers. Line to the transmitter, one end of the primary winding to the common rail,
The other end of the secondary winding is connected to the standard gauge rail and the narrow gauge rail, and the impedance bond on the receiving side connects one end of the primary winding to the common rail and the other end of the primary winding to the standard gauge signal. Connected to the standard gauge rail and narrow gauge rail via current detector and narrow gauge signal current detector respectively, and the transmitter outputs the train detection signal to the standard gauge rail and narrow gauge rail via the transmission side impedance bond. The standard gauge signal current detector has a current detection coil and a level detector.The standard gauge signal current detector's current detection coil detects the signal current of the train detection signal on the standard gauge rail. The level detector of the standard rail signal current detector is based on the signal current level of the train detection signal detected by the current detection coil of the standard rail signal current detector. standard Detecting the break of the dedicated rail, the narrow-gauge signal current detector has a current detection coil and a level detector, and the narrow-gauge signal current detector current detection coil is the signal current of the train detection signal on the narrow-gauge dedicated rail The level detector of the narrow gauge signal current detector detects the presence or absence of a train on a narrow gauge based on the signal current level of the train detection signal detected by the current detection coil of the narrow gauge signal current detector, and the common rail and By detecting the break of the narrow gauge dedicated rail and directly detecting the level of the signal current, the presence or absence of the train and the presence or absence of the break of the rail are detected on each of the standard gauge and the narrow gauge.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The three-track track circuit according to the present invention determines whether or not a train is present in a track circuit when a conventional train and a Shinkansen train run in a common line section, and determines whether or not each rail is present. This is to detect breakage.

In the three-wire track circuit, one of the three rails is used as a common rail to constitute a standard gauge and a narrow gauge. For example, a boundary portion of the three-wire track circuit on the train detection signal transmission side and the train detection signal reception are provided. Equipped with one impedance bond at the side boundary part, equipped with a transmitter as a train detection signal transmitter, and as a train detection signal receiver, a receiver, a standard gauge signal current detector, and a narrow gauge signal current detector Is provided.

The transmitting side impedance bond connects the secondary winding to the transmitter, connects one end of the primary winding to a common rail, and connects the other end of the primary winding to a standard rail dedicated rail and a narrow gauge dedicated rail. Connecting. The impedance bond on the receiving side connects one end of the primary winding to the common rail, and the other end of the primary winding via the standard gauge signal current detector and the narrow gauge signal current detector, for the standard gauge rail and narrow gauge only. Connect to each rail
Connect the receiver to the next winding. Here, the neutral point of the primary winding of the impedance bond on the transmitting side is connected to the neutral point of the primary winding of the impedance bond on the receiving side of the adjacent three-wire track circuit, and the return current is transmitted to the substation. Is flowing up. The transmitter outputs a train detection signal to the standard-gauge rail and the narrow-gauge rail via the transmission-side impedance bond.

The signal current detector for a standard gauge has a current detecting coil and a level detector. The current detection coil of the standard gauge signal current detector detects the signal current on the standard rail dedicated rail, and the level detector of the standard gauge signal current detector is the current detection coil of the standard gauge signal current detector. The presence or absence of a train on the standard gauge and the breakage of the common rail and the standard gauge dedicated rail are detected based on the detected signal current level. Similarly,
The narrow-gauge signal current detector has a current detection coil and a level detector. The narrow-gauge signal current detector current detection coil detects the signal current on the narrow-gauge dedicated rail, and the level of the narrow-gauge signal current detector. The detector detects the presence or absence of a train on the narrow gauge and the breakage of the rail based on the level of the signal current detected by the current detecting coil of the narrow gauge signal current detector. As described above, since the current flowing through the standard-gauge dedicated rail and the narrow-gauge dedicated rail is directly detected, the presence / absence of a train and the breakage of the rail can be reliably detected. Further, since the presence or absence of a train on the standard gauge and the narrow gauge can be separately detected, a jumper wire or the like between the standard gauge and the narrow gauge can be eliminated. Here, for example, a relay is used as the level detector.

The receiver detects a train on a standard gauge rail and a narrow gauge rail via an impedance bond on the receiving side, and transmits a control signal to a subsequent train or the like.

[0016]

FIG. 1 is a block diagram of a train detection device for a three-track track showing one embodiment of the present invention. As shown in the figure, the three-track track circuit detects a train when, for example, a conventional line train and a Shinkansen train run in a common line section, and includes a common rail 1, a standard rail dedicated rail 2, and a narrow gauge dedicated rail. Rails 3 and 2
A three-wire track circuit is formed with the two impedance bonds ZB ₁₁ and ZB ₂₂ .

The three-wire track circuit is provided with impedance bonds ZB ₁₁ and ZB ₂₂ at a boundary portion on the train detection signal transmission side and a boundary portion on the train detection signal reception side, respectively, and a transmitter T1 as a train detection signal transmission side device. And a standard gauge signal current detector 21, a narrow gauge signal current detector 22, and a receiver R2 as a train detection signal receiving side device. Impedance bond ZB ₁₁ on the transmitting side connects a secondary winding to the transmitter T1, one end of the primary winding connected to the common rail 1, standard track dedicated rail 2 and narrow gauge only the other end of the primary winding Connect to rail 3. Recipient of the impedance bond ZB ₂₂ connects one end of the primary winding to the common rail 1, the other end of the primary winding through a standard gauge signal current detector 21 and the narrow gauge signal current detector 22 standard gauge A dedicated rail 2 and a narrow rail dedicated rail 3 are connected to each other, and a secondary winding is connected to the receiver R2. Impedance bond Z on the transmitting side of boundary point 20 of three-wire track circuit
The primary winding of the neutral point of the B ₁₁ N1 is connected to the primary winding of the neutral point N1 of the receiving impedance bond ZB ₁₂ three-gauge track circuit Tonaria'. Then, one of the current flowing through the neutral point N1 from the common rail 1 from current and standard track dedicated rail 2 and narrow gauge dedicated rail 3 flowing through the neutral point N1 of the impedance bond ZB ₁₁ occurs a little unbalanced. Although the current flowing through the other of the impedance common rail 1 the current flowing through the neutral point N1 from the standard track dedicated rail 2 and narrow gauge special rails 3 Karakara neutral point of bonds ZB ₁₂ is a little unbalanced occurs, correspondingly impedance bond In order to prevent the retrace current, its resistance is provided.

The transmitter T1 outputs a train detection signal in the standard track dedicated rail 2 and narrow gauge special rails 3 through the impedance bond ZB ₁₁ of the transmission side. Here, the frequency of the train detection signal is 50 Hz or 60 Hz, which is the frequency of the electric vehicle current, and a low frequency that avoids the frequency of its modulated wave. That is, the frequency of the train detection signal is 25Hz or 30Hz, 83Hz or 100H
Use the frequency of the existing low-frequency orbital circuit, such as z.

The standard gauge signal current detector 21 includes a current detection pickup coil PC ₂₁ and the level detector DR _21. The pickup coil PC ₂₁ of the standard gauge signal current detector 21 detects the signal current on the standard gauge dedicated rail 2,
The level detector DR ₂₁ of the standard rail signal current detector 21 detects the presence or absence of a train on the standard rail and the breakage of the common rail 1 and the standard rail dedicated rail 2 based on the signal current level detected by the pickup coil PC _21. Then, it notifies the receiver R2. Narrow gauge signal current detector 22, likewise has current detecting pickup coil PC ₂₂ and level detector DR _22. Pickup coil P of narrow gauge signal current detector 22
C ₂₂ detects the signal current on the narrow gauge dedicated rail 3, and the level detector DR ₂₂ of the narrow gauge signal current detector ₂₂ detects the level of the signal current detected by the pickup coil PC ₂₂ of the narrow gauge signal current detector 22. Based on this, the presence or absence of a train on a narrow gauge and the breakage of the common rail 1 and the narrow gauge dedicated rail 3 are detected and notified to the receiver R2. Receiver R2 detects the train detection signal on the upper standard track dedicated rail 2 via the receiving side of the impedance bond ZB ₂₂ and narrow gauge special rails 3, and transmits a control signal for subsequent trains like.

In the three-wire track circuit having the above configuration, when no train exists on the three-wire track circuit, the return current is supplied from the neutral point N2 via the common rail 1, the standard rail dedicated rail 2, and the narrow gauge dedicated rail 3. It flows to the neutral point N1, and similarly to the substation.

The transmitter T1 outputs a train detection signal in the standard track dedicated rail 2 and narrow gauge special rails 3 through the impedance bond ZB ₁₁ of the transmission side. Here, as already explained, the frequency of the existing low-frequency track circuit such as 25 Hz or 30 Hz, 83 Hz or 100 Hz is used as the frequency of the train detection signal. It is possible to install a three-wire track circuit having a long control length equivalent to that of the frequency track circuit, which is excellent in economy and can reduce the number of installation work steps.

When, for example, a Shinkansen train enters the three-wire track circuit and short-circuits the common rail 1 and the standard rail dedicated rail 2 with wheels and axles, the train detected by the pickup coil PC _{21 of} the standard rail signal current detector ₂₁ is detected. The current level of the detection signal and the current level of the train detection signal at the receiver R2 decrease, and the level detector D of the standard gauge signal current detector 21 is reduced.
R ₂₁ detects that the Shinkansen train enters on a standard gauge,
A signal indicating this is sent to the receiver R2, and the receiver R2 detects the presence of a Shinkansen train (located on a line).

Further, if the Shinkansen train them pass through the portion of the transmission side impedance bond ZB _11, the signal current from the transmitter T1 is, for example pickup standard gauge signal current detector 21 via a transmission side impedance bond ZB ₁₁ transmitted to the coil PC ₂₁ and receiver R2, level detector DR ₂₁ of standard gauge signal current detector 21 detects no Shinkansen train (absent line), and outputs a signal indicating to the receiver R2.

If there is no train on the three-wire track circuit and if, for example, the standard rail dedicated rail 2 breaks, the signal current is supplied to the pickup coil PC ₂₁ of the standard rail signal current detector 21. Does not flow, and the level detector DR ₂₁ of the signal current detector ₂₁ for the standard gauge is a rail 2 for the standard gauge.
It detects that no signal current is flowing on it, and detects breakage of the standard rail dedicated rail 2. Even when the narrow gauge rail 3 is broken, the narrow gauge current detector 22
Detects a break in the narrow gauge dedicated rail 3. As described above, when the breakage of the standard rail dedicated rail 2 and the narrow gauge dedicated rail 3 as well as the common rail 1 is detected, the standard gauge break detector 21
In addition, since the narrow gauge break detector 22 operates in conjunction with the receiver R2 and drops the relay of the receiver R2, the subsequent train can be stopped to ensure safety.

In the three-wire track circuit, train detection and rail breakage are separately detected by a standard gauge and a narrow gauge.
Since the standard device dedicated rail 2 and the narrow gauge dedicated rail 3 are not connected as in the related art, it is possible to eliminate the cost of jumper wires and the like.

Furthermore, since the signal current of the train detection signal is directly detected to detect the train and the break of the rail, the control length can be increased, the total number of three-track track circuits in the line section can be reduced, and the installation cost can be reduced. Can be reduced.

Furthermore, with the above configuration, the difference between the current flowing through one common rail 1 and the total current flowing through the standard rail dedicated rail 2 and the narrow gauge dedicated rail 3 is very small, especially in the AC electrified section. There are few malfunctions.

[0028]

As described above, according to the present invention, the signal current flowing through the standard gauge dedicated rail and the narrow gauge dedicated rail are separately detected at the receiving end. The presence or absence of a train on a narrow gauge and the presence or absence of breakage of each rail can be reliably detected.

Further, at the receiving end, the signal currents flowing through the standard gauge dedicated rail and the narrow gauge dedicated rail are separately detected, and the presence or absence of the train on the standard gauge and the narrow gauge is detected based on the detected signal current level. In addition, there is no need to connect the standard rail dedicated rail and the narrow gauge dedicated rail with a jumper wire or the like, and the cost of the jumper wire and the like can be reduced.

Further, since the signal current of the train detection signal is directly detected, the control length can be increased, the total number of track circuits in the line section can be reduced, and the installation cost can be reduced.

[Brief description of the drawings]

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

FIG. 2 is a configuration diagram of a conventional three-wire track circuit.

[Explanation of symbols]

 DR Level detector N Neutral point PC Pickup coil R Receiver T Transmitter ZB Impedance bond 1 Common rail 2 Rail for standard gauge 3 Rail for narrow gauge 11 Signal current detector for standard gauge 12 Signal current detector for narrow gauge 21 Standard gauge Signal current detector 22 Signal current detector for narrow gauge

Claims (1)

(57) [Claims] 1. A three-wire track circuit for detecting a train in a section comprising a standard gauge and a narrow gauge using one rail as a common rail using three rails, wherein a boundary of a train detection signal transmission side of the three-wire track circuit is provided. A part is provided with an impedance bond at a boundary part between a train detection signal receiving side and a transmitter as a train detection signal transmitting side device. A receiver and a standard gauge signal current detector are used as a train detection signal receiving side device. And a narrow gauge signal current detector, the impedance bond on the transmitting side connects the secondary winding to the transmitter, connects one end of the primary winding to the common rail, and connects the other end of the primary winding to the standard gauge. Connected to the dedicated rail and the narrow gauge dedicated rail, the impedance bond on the receiving side connects one end of the primary winding to the common rail, and the other end of the primary winding to the standard gauge signal current detector and narrow gauge signal current detector. Through standard gauge Connected to the rail for narrow gauge and the rail for narrow gauge respectively, the transmitter outputs the train detection signal to the rail for standard gauge and the rail for narrow gauge via the impedance bond on the transmitting side, and the signal current detector for standard gauge uses the current detection coil And a level detector, the current detection coil of the standard rail signal current detector detects the signal current of the train detection signal on the standard rail dedicated rail, and the level detector of the standard rail signal current detector is standard. Based on the signal current level of the train detection signal detected by the current detection coil of the rail signal current detector, the presence or absence of a train on the standard rail and the breakage of the common rail and the standard rail dedicated rail are detected. The detector has a current detection coil and a level detector, and the current detection coil of the narrow-gauge signal current detector detects the signal current of the train detection signal on the narrow-gauge dedicated rail, and detects the narrow-gauge signal current. The level detector of the detector shall detect the presence or absence of a train on a narrow gauge and the breakage of a common rail and a rail dedicated to a narrow gauge based on the signal current level of the train detection signal detected by the current detection coil of the narrow gauge signal current detector. A three-wire track circuit.