JP2009113646A - Protector for non-insulated track circuit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-reliability protector for a non-insulated track circuit that is small, has a relatively simple structure, facilitates maintenance, and appropriately prevents burnout on the cable side. <P>SOLUTION: The protector for a non-insulated track circuit is provided with a protector 10 and a protector 20 connected with the protector 10. The protector 10 has an LC resonator 12, which is connected to boundary points of first/second non-insulated track circuits 1-i, 2-j so as to extract a signal wave flowing on the non-insulated track circuit 1-i, and a protection device 13 that suppresses an excessive abnormal voltage generated between the first/second non-insulated track circuits so as to discharge an excessive abnormal current. The protector 20 has a matching transformer 22 for transferring the extracted signal wave to an ATC transceiver 26 via cables 25-1, 25-2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a non-insulated track circuit protector connected to an uninsulated track circuit such as a bullet train.

  For example, a low-speed train such as a conventional line employs a method in which a traffic light is provided on the ground and the driver manually controls the speed while checking the signal. On the other hand, in high-speed trains such as Shinkansen, in order to prevent danger and ensure safety, an in-vehicle signal system that displays signals on the cab and an automatic train control device that automatically performs brake control etc. Control, hereinafter referred to as “ATC device”). The ATC device has the following functions (1) to (3), for example.

(1) In-vehicle signal display function A signal indicating the allowable operation speed of the train is continuously displayed on the cab according to the distance from the preceding train and the condition of the track.

(2) Automatic deceleration control function The speed indicated by the signal is always compared with the train speed, and if the train speed exceeds the speed indicated by the signal, the brake is automatically operated to decelerate, and when the speed falls below the predetermined speed Release the brake.

(3) Deceleration control function when the station stops, etc. Deceleration and stop control is automatically performed according to the approach to the turnout, approach to the stop, etc.
The ATC device detects the presence or absence of a train, knows the train interval, track conditions, and the state of the forward route through the interlocking device based on the data, and based on the result, transmits a necessary allowable speed signal to the train, And an on-board device that controls the speed of the vehicle by decoding the above signal. The ground device is composed of an orbital circuit, a transmitter / receiver, and the like, and uses an orbital circuit system in which an ATC signal current is supplied to the rail. The track circuit includes an insulated track circuit and an uninsulated track circuit.

  In the insulated track circuit, for example, a train is detected and an ATC signal is transmitted simultaneously by a transceiver. Rail insulation seams and impedance bonds are provided at the boundary with the adjacent track circuit. The impedance bond has a function of flowing a return current returning from the vehicle to the substation without flowing a signal current. A security device and a transformer are connected to each impedance bond. The plurality of security devices and the transformer are connected to an ATC transmitter / receiver centrally installed remotely by a cable.

  In the insulated track circuit, when there is no train in the track circuit, the signal current sent from the power supply side flows to the power receiving end on the opposite side and excites the track relay. When this state is "no train" and the train enters this section, the left and right rails are short-circuited by the wheels and axles, so the signal current does not flow to the track relay and is demagnetized. When this state is “with train” and the relay does not operate, it is assumed that there is a train ahead, and a signal of a predetermined frequency is transmitted behind. In this method, the current for the train detection and the signal can be made common, and if the rail breaks, it is demagnetized, so it has the advantage that it works safely because it has a train, but the rail insulation joint However, there is a drawback that it is a weak point in terms of maintenance and strength.

  The technology of such an insulated track circuit is described in the following Patent Document 1, and further, the technology of the ground receiving device for an insulated track circuit and the train control device is described in the following Patent Document 3.

  On the other hand, the non-insulated track circuit has an advantage that cost savings and maintenance can be simplified because there are no impedance bonds or rail insulators. However, as described in Patent Document 2 below, since there is no function of blocking the signal at the boundary of the track circuit, the signal transmitted to the adjacent section flows and interference with the signal in that section occurs. Therefore, the train detection signal that always needs to be transmitted, and the ATC signal that needs to be transmitted to the track circuit only when the train enters the track circuit and are routed, are switched and sent to the track circuit. ing.

Japanese Patent Laid-Open No. 9-2270 JP-A-9-301173 JP 2002-337686 A

  However, as a conventional technique, there is a protector for an insulated track circuit, but there is no suitable protector for an uninsulated track circuit.

For example, the non-insulated track circuit protector has the following responsibilities.
The track circuit used for detecting the train line and transmitting / receiving information to / from the train uses the rail to return the electric circuit for the train current, so it is used to detect the train line and transmit / receive information to / from the train In addition to the regular signal wave, various noises such as train current fundamental waves and harmonics are mixed due to the influence of the train current and the like. For this reason, when noise exceeding a certain permissible value is mixed in, it is used for non-insulated track circuits so that abnormal voltages and currents do not flow into the cable connected to ATC transmitters / receivers installed remotely and centrally. Responsible for blocking noise with a protective device. On the other hand, when noise below a certain permissible value is mixed, the non-insulated track circuit protector is responsible for normal transmission / reception of signals without performing a protection operation.

  Since the non-insulated track circuit protector has such responsibilities, the technology of the conventional insulated track circuit protector cannot be applied as it is, and the cable side can be prevented from being burned accurately. It was difficult to realize a highly reliable non-insulated track circuit protector.

  Further, as described above, in the insulated track circuit, an impedance bond is provided between the rail and the protector. Therefore, most of the abnormal current that intrudes from the rail side to the signal cable side in the event of a ground fault is suppressed by the impedance bond. Therefore, the protector disposed in the subsequent stage of the impedance bond has a current withstand capability. As long as it has a predetermined performance, it is not necessary to have a particularly high performance. For example, in the event of a ground fault, an abnormal current of about 10,000 A may occur from the rail side to the signal cable side, but most of the abnormal current is suppressed by the impedance bond. Should have a current resistance of about 500A.

  On the other hand, as described above, no impedance bond is provided in the non-insulated track circuit. Therefore, for example, when an abnormal current of about 10000 A is generated from the rail side to the signal cable side due to a ground fault, a large abnormal current of about 5000 A (about a half) enters the protector. there is a possibility. Here, as one measure against this problem, it is conceivable to apply a high-performance withstand current (for example, about 5000 A) with respect to the protector itself and the accompanying components such as inductance and capacitance. However, if each with a high current withstand capability is applied, the protective device becomes very large as a whole, and the manufacturing cost is greatly increased. Moreover, since the whole protector becomes large, the problem that a large installation space must be ensured also arises.

  An object of the present invention is to provide a highly reliable non-insulated track circuit protector that has a relatively simple structure, is small, is easy to maintain, and can accurately prevent cable-side burnout. .

  To achieve the above object, the non-insulated track circuit protector according to the first aspect of the present invention includes the first and second protectors. Here, the first protector is connected to a boundary point between the first and second non-insulated track circuits laid in parallel, and extracts a signal wave flowing on the first non-insulated track circuit. An extraction circuit; and a first protection device that suppresses an excessive abnormal voltage generated between the first and second non-insulated track circuits and discharges an excessive abnormal current. Further, the second protector is connected to the first protector and transfers the signal wave extracted by the extraction circuit to the ATC transceiver on the apparatus side via the first cable. It is.

  Further, the non-insulated track circuit protector of the second invention is provided with a third protector in the non-insulated track circuit protector of the first invention. Here, the third protector is connected to the first protector, and detects the difference between the train current flowing through the first and second non-insulated track circuits and the ATC current transmitted and received. It has a current transformer that converts the current into a voltage and sends it to the monitoring device via the second cable.

  According to the first and second inventions, the first protective device provided in the first protector on the boundary point side of the non-insulated track circuit discharges an abnormal current or abnormal voltage at the time of a feeding accident, By suppressing, the 2nd and 3rd protectors can be protected, As a result, the burning of the 1st and 2nd cable side connected to these 2nd and 3rd protectors is prevented appropriately Can do. Therefore, it is possible to realize a highly reliable non-insulated track circuit protector that has a relatively simple structure, is small, is easy to maintain, and can accurately prevent cable-side burnout. Contribute to stable and safe transportation of trains.

  The above and other objects and novel features of the present invention will become more fully apparent when the following description of the preferred embodiment is read in conjunction with the accompanying drawings. However, the following drawings are for explanation only and do not limit the scope of the present invention.

(Configuration of Example 1)
FIG. 1 is a schematic configuration diagram of a non-insulated track circuit protector showing Embodiment 1 of the present invention.
This non-insulated track circuit protector includes first and second non-insulated track circuits 1-i, 2-j (where i = 1 to n, j) each composed of two parallel rails through which the train TR passes. = 1 to n, where n is a plurality), the first and second protectors 10 and 20 are connected to each boundary point. Of the first and second protectors 10 and 20, the first protector 10 has two pairs of input / output terminals 11-1 and 11-2 and input / output terminals 14-1 and 14-2. One pair of the input / output terminals 11-1 and 11-2 is electrically connected to a boundary point between the first and second track circuits 1-i and 2-j, and the other pair of input / output terminals. The second protector 20 is electrically connected to the terminals 14-1 and 14-2.

  That is, the first protector 10 includes an input / output terminal 11-1 connected to a boundary point of a first non-insulated track circuit (hereinafter simply referred to as “first track circuit”) 1-i, And an input / output terminal 11-2 connected to a boundary point of 2-j, and an extraction circuit is connected to the input / output terminal 11-1. The input / output terminal 14-1 is connected via the (for example, LC resonator) 12, and the input / output terminal 14-2 is connected to the input / output terminal 11-2. A first protective device 13 having a discharge gap or the like is connected between the input / output terminal 14-1 and the input / output terminal 14-2.

  The LC resonator 12 resonates with a signal wave frequency used for train line detection and information transmission / reception with the train TR, selects a signal wave, and removes and attenuates waves other than necessary. It is comprised by the series circuit of the coil 12b. The internal wiring of the LC resonator 12 is, for example, about 2 sq, and the withstand voltage is, for example, alternating current (AC), about 5 KV / 1 minute. The first protective device 13 is composed of, for example, a series circuit of two arrester tubes (also referred to as “arresters”) 13a and 13b having a discharge gap, and is a feeder system used for a train power source. By suppressing an excessive abnormal voltage between the first and second track circuits 1-i, 2-j that occurs at the time of a ground fault or when the track circuit (rail) is broken, an excessive abnormal current is discharged. 2 has a function of blocking the abnormal voltage or abnormal current from entering the protector 20 side. The withstand voltage of the protective device 13 is, for example, about AC 5 KV / 1 minute. The first protector 10 having such a protective device 13 is a protective device on the side close to the boundary point between the first and second track circuits 1-i and 2-j, and is particularly suitable for abnormal voltage and abnormal current. Since it is in a position where it is easily affected, for example, two high-current-capacity surge arresters 13a and 13b capable of discharging at 50 Hz 10000 A or more are connected in series to ensure high reliability.

  The second protector 20 includes two pairs of input / output terminals 21-1, 21-2 and input / output terminals 24-1, 24-2, a matching transformer 22, and a second protective device (for example, a discharge device). And a lightning arrester having a gap 23). The input / output terminals 21-1 and 21-2 are connected to the input / output terminals 14-1 and 14-2 of the first protector 10, respectively. The primary winding of the matching transformer 22 is connected between the input / output terminals 21-1 and 21-2, and the surge arrester 23 is connected in parallel to the secondary winding of the matching transformer 22. In addition, input / output terminals 24-1 and 24-2 are connected to both ends of the secondary winding. The input / output terminals 24-1 and 24-2 are connected to the ATC transceiver 26 via the first cables 25-1 and 25-2.

  The matching transformer 22 performs matching between the impedance on the first and second track circuits 1-i, 2-j side and the impedance on the first cables 25-1, 25-2 side, This minimizes the attenuation of signal waves used for information transmission / reception with the train TR. As a protective function of the matching transformer 22, the withstand voltage between the first cables 25-1, 25-2 side and the first and second track circuits 1-i, 2-j side and the ground is set to It can be secured by the protective device 13 by securing a voltage higher than the abnormal voltage generated at the time of the power supply power supply system accident to prevent the first cables 25-1 and 25-2 from being damaged due to the breakdown voltage. By using a wiring that can withstand an abnormal current of a certain value or less between the first and second track circuits 1-i and 2-j, the matching transformer 22 is not easily destroyed. . The withstand voltage of the matching transformer 22 is, for example, about AC 5 KV / 1 minute. The arrester 23 connected in parallel to the secondary winding of the matching transformer 22 protects the final stage of noise entering the first cables 25-1 and 25-2.

(Operation of Example 1)
At the boundary point between the first track circuit 1-i and the second track circuit 2-j, a substantially equal train current having a current difference equal to or less than an allowable value (for example, about 100 A) flows. This train current includes a signal wave used for detecting a train line and transmitting / receiving information to / from the train TR. The LC resonator 12 selects a signal wave necessary for ATC by resonating with the signal wave frequency. The selected signal wave is sent to the ATC transmitter / receiver 26 via the matching transformer 22 and the cables 25-1 and 25-2, and the speed control, deceleration, stop control, etc. of the train TR are automatically performed. .

  When a ground accident occurs in the feeder system used for the train power supply or when the track circuit (rail) breaks or the like, an excessive abnormal voltage is generated between the first and second track circuits 1-i and 2-j. Or excessive abnormal current flows. Then, the protective device 13 is discharged through the LC resonator 12, the input / output terminals 14-1 and 14-2 are short-circuited, an excessive abnormal current is discharged, and an excessive abnormal voltage is suppressed. As a result, abnormal voltage and abnormal current do not enter the cables 25-1 and 25-2 from the matching transformer 22, so that the cables 25-1 and 25-2 and the ATC transceiver 26 are protected from burning and the like. .

  If the protective device 13 is not provided, it is necessary to make the structure of the matching transformer 22 have an excessive current withstand capability in order to take measures against an abnormal current that occurs in the event of a ground fault in the power system of the train power supply. However, in addition to size restrictions and cost restrictions, the current withstand capability cannot be technically secured due to excessive abnormal current, so it is considered that destruction of the matching transformer 22 is inevitable. In addition, since the matching transformer 22 cannot secure an excessive current withstand capability, a method of interrupting an abnormal current by providing a portion corresponding to a fuse must be employed.

  However, since the protective device 13 is provided in the first embodiment, it is possible to eliminate the interruption of the line in a normal state other than when the protective device 13 is out of order, and the influence on the train operation is extremely reduced. It becomes possible.

  Furthermore, the matching transformer 22 uses a wiring that can withstand an abnormal current of a certain value or less between the first and second track circuits 1-i, 2-j that could not be protected by the protective device 13, The matching transformer 22 employs a structure that does not easily break. As a result, the withstand voltage between the cable 25-1, 25-2 side, the first and second track circuits 1-i, 2-j side, and the ground is changed to an abnormal voltage generated at the time of a power train failure of the train power source. By securing the above, burnout due to pressure breakdown between the grounds on the cable 25-1, 25-2 side can be accurately prevented. In addition, since the lightning arrester 23 is connected in parallel to the secondary winding of the matching transformer 22, it is possible to protect the final stage of noise entering the cables 25-1 and 25-2.

(Effect of Example 1)
According to the first embodiment, since the protective device 13 is connected to the boundary point side of the first and second track circuits 1-i, 2-j, abnormal current and abnormal voltage at the time of a feeding system accident are detected. By discharging and suppressing, the LC resonator 12 and the matching transformer 22 can be protected. Furthermore, the current is made to withstand and open the matching transformer 22 and the internal wiring of the LC resonator 12 with respect to the abnormal current at a level that cannot be protected by the protective device 13, thereby minimizing the damage to the matching transformer 22. Coordination is provided so that it can be limited. Moreover, since the arrester 23 as a final protection device is provided on the secondary winding side of the matching transformer 22, if the influence of the ground fault current etc. reaches the matching transformer 22 temporarily. In this case, when the discharge tube 23 is discharged, it is possible to accurately prevent the long first cables 25-1 and 25-2 connected to the equipment side of the matching transformer 22 from being burned out.

  As described above, in the first embodiment, a highly reliable non-insulated track circuit protector capable of accurately preventing cable-side burnout with a relatively simple structure, small size, and easy maintenance is realized. it can. Therefore, it is possible to contribute to stable and safe transportation of the train TR using the non-insulated track circuit.

(Configuration of Example 2)
FIG. 2 is a schematic configuration diagram of a non-insulated track circuit protector showing Embodiment 2 of the present invention. Elements common to those in FIG. 1 showing Embodiment 1 are denoted by common reference numerals. Yes.

  In the non-insulated track circuit protector of the second embodiment, a third protector 30 is connected to the first protector 10 of the first embodiment. The third protector 30 includes a current transformer 31 including two primary windings 31a and 31b and one secondary winding 31c, and a third protective device (for example, a surge arrester having a discharge gap). 32 and a pair of input / output terminals 33-1 and 33-2.

  The primary windings 31 a and 31 b of the current transformer 31 are connected to input / output terminals 14-1 and 14-2 of the first protector 10. The input / output terminals 21-1 and 21-2 of the second protector 20 are connected to the input / output terminals 14-1 and 14-2 of the first protector 10 through the primary windings 31a and 31b, respectively. It is connected. A lightning tube 32 is connected in parallel to both ends of the secondary winding 31c of the current transformer 31, and input / output terminals 33-1 and 33-2 are connected to each other. The input / output terminals 33-1 and 33-2 are connected to the monitor device 35 in the equipment room via the second cables 34-1 and 34-2.

The current transformer 31 detects the difference between the train currents flowing in the first and second track circuits 1-i, 2-j and the ATC current transmitted / received, and displays them on the monitor device 35 in the equipment room. As a protection function of the current transformer 31, the withstand voltage between the second cables 34-1 and 34-2 and the first and second track circuits 1-i and 2-j and the ground is set to A voltage higher than the abnormal voltage generated at the time of the power system accident is prevented to prevent burning due to a breakdown voltage between the grounds on the second cables 34-1 and 34-2 side, and the protection device 13 cannot protect. The current transformer 31 is structured not to be easily broken by using wiring that can withstand an abnormal current of a certain value or less between the first and second track circuits 1-i, 2-j. The withstand voltage of the current transformer 31 is, for example, about AC 5 KV / 1 minute. The arrester 32 connected in parallel with the secondary winding 31c of the current transformer 31 protects the final stage of noise entering the second cables 34-1 and 34-2.
Other configurations are the same as those of the first embodiment.

(Operation of Example 2)
The difference between the train currents flowing at the boundary between the first track circuit 1-i and the second track circuit 2-j and the ATC current transmitted / received are detected by the current transformer 31, and the detection result is the cable 34-1. , 34-2, and is displayed on the monitor device 35 in the equipment room, whether or not the difference in the train current is less than the allowable value is monitored, and the ATC current flowing into and out of the rail is also monitored.

  When a ground accident occurs in the feeder system used for the train power supply or when the track circuit breaks or the like, an excessive abnormal voltage is generated between the first and second track circuits 1-i and 2-j. Or excessive abnormal current flows. Then, the protective device 13 is discharged through the LC resonator 12, the input / output terminals 14-1 and 14-2 are short-circuited, an excessive abnormal current is discharged, and an excessive abnormal voltage is suppressed. As a result, abnormal voltage and current do not enter the cables 25-1 and 25-2 from the matching transformer 22 and the cables 34-1 and 34-2 from the current transformer 31. 25-2, 34-1 and 34-2 and the ATC transceiver 26 are protected from burning and the like.

  If the protective device 13 is not provided, the structure of the matching transformer 22 and the current transformer 31 is set to an excessive current in order to take measures against an abnormal current that occurs at the time of a ground fault in the feeder system of the train power source. Although it is necessary to have a withstand capacity, the current transformer cannot be secured technically due to the excessive abnormal current in addition to the size and cost restrictions. Therefore, the destruction of the matching transformer 22 and the current transformer 31 should be avoided. It is considered impossible. In addition, since the matching transformer 22 and the current transformer 31 cannot ensure an excessive current withstand capability, a method of interrupting an abnormal current by providing a portion corresponding to a fuse must be employed.

  However, since the protective device 13 is provided in the second embodiment as in the first embodiment, it is possible to eliminate the interruption of the line in a normal state other than the time when the protective device 13 is out of order. It is possible to greatly reduce the influence of.

  Furthermore, the current transformer 31 uses a wiring that can withstand an abnormal current of a certain value or less between the first and second track circuits 1-i and 2-j that could not be protected by the protection device 13. A structure in which the current transformer 31 is not easily broken is adopted. As a result, the withstand voltage between the cables 34-1 and 34-2 and the first and second track circuits 1-i and 2-j and the ground is changed to an abnormal voltage generated at the time of a power train failure of the train power supply. By securing the above, burnout due to pressure breakdown between the grounds on the cables 34-1 and 34-2 side can be accurately prevented. Moreover, since the lightning arrester 32 is connected in parallel to the secondary winding 31c of the current transformer 31, it is possible to protect the final stage of noise entering the cables 34-1 and 34-2.

(Effect of Example 2)
According to the second embodiment, as in the first embodiment, the protective device 13 is connected to the boundary point side of the first and second track circuits 1-i, 2-j. By discharging and suppressing the abnormal current and abnormal voltage, the LC resonator 12, the matching transformer 22, the current transformer 31 and the like can be protected. Furthermore, for the abnormal current of a level that cannot be protected by the protective device 13, the current is provided with a resistance and an open function in the matching transformer 22, the current transformer 31 and the LC resonator 12, and the matching transformer. 22 and current transformer 31 are coordinated to minimize damage. Moreover, since the lightning arresters 23 and 32, which are final protection devices, are provided on the secondary winding side of the matching transformer 22 and the secondary winding 31c side of the current transformer 31, respectively. Even when the current transformer 22 or the current transformer 31 is affected by a ground fault current or the like, the discharge tubes 23 and 32 are discharged, so that the matching transformer 22 or the current transformer 31 is moved to the equipment side. Burnout of the long first cables 25-1 and 25-2 and the second cables 34-1 and 34-2 to be connected can be accurately prevented.

  As described above, in the second embodiment, a highly reliable non-insulated track circuit protector that is relatively simple in structure, small in size, easy to maintain, and can accurately prevent cable-side burnout is provided. realizable.

(Configuration of Example 3)
FIG. 3 is a schematic configuration diagram of a non-insulated track circuit protector showing Embodiment 3 of the present invention. Elements common to those in FIG. 2 showing Embodiment 2 are denoted by common reference numerals. Yes.

  In the non-insulated track circuit protector of the third embodiment, a protector 10A having a circuit configuration different from that of the first protector 10 of the second embodiment is provided. The protector 10A includes a pair of input / output terminals 11-1, 11-2 connected to the boundary points of the first and second track circuits 1-i, 2-j, and the input / output terminals 11-1, 11-2. 11-2, a protection device 13 connected between 11-2, an LC resonator 12 having one electrode connected to the input / output terminal 11-1, and an input / output terminal 14 connected to the other electrode of the LC resonator 12. -1 and an input / output terminal 14-2 connected to the input / output terminal 11-2. That is, in the protector 10A of the third embodiment, the protection device 13 is connected to the boundary point side of the first and second track circuits 1-i and 2-j, and the second and third of the protection device 13 are connected. The LC resonator 12 is connected to the protectors 20 and 30 side. Other configurations are the same as those of the first embodiment.

(Operation / Effect of Example 3)
When a ground accident occurs in the feeder system used for the train power supply or when the track circuit breaks or the like, an excessive abnormal voltage is generated between the first and second track circuits 1-i and 2-j. Or excessive abnormal current flows. Then, the protective device 13 is discharged, the input / output terminals 11-1 and 11-2 are short-circuited, an excessive abnormal current is discharged, and an excessive abnormal voltage is suppressed. As a result, abnormal voltage and abnormal current do not enter the LC resonator 12, the matching transformer 22, and the current transformer 31, so that these LC resonator 12, matching transformer 22, and current transformer 31 are The cable 25-1, 25-2, 34-1 and 34-2 and the ATC transmitter / receiver 26 can be protected from burnout and the like. Moreover, since the LC resonator 12, the matching transformer 22, and the current transformer 31 can be protected by the protective device 13, the withstand voltage and withstand voltage of the LC resonator 12, the matching transformer 22, and the current transformer 31 are protected. The current characteristics can be reduced, and thereby the non-insulated track circuit protector can be reduced in size.

(Configuration of Example 4)
FIG. 4 is a schematic configuration diagram of a non-insulated track circuit protector showing Embodiment 4 of the present invention. Elements common to those in FIG. 2 showing Embodiment 2 are denoted by common reference numerals. Yes.

  In the non-insulated track circuit protector according to the fourth embodiment, a protector 10B having a circuit configuration different from that of the first protector 10 according to the second embodiment is provided. The protector 10B includes a pair of input / output terminals 11-1 and 11-2 connected to the boundary points of the first and second track circuits 1-i and 2-j, and the input / output terminals 11-1 An LC resonator 12 to which one electrode is connected; an input / output terminal 14-1 connected to the other electrode of the LC resonator 12 via a primary winding 31a of the current transformer 31; The input / output terminal 14-2 connected to the output terminal 11-2 via the primary winding 31b of the current transformer 31 and the protective device 13 connected between the input / output terminals 14-1 and 14-2. It is comprised by. Other configurations are the same as those of the second embodiment.

(Operation / Effect of Example 4)
If a ground accident occurs in the feeder system used for the train power supply or if the track circuit breaks or the like, an excessive abnormal voltage is generated between the track circuits 1-i and 2-j, or an excessive abnormality occurs. Current flows. Then, the protective device 13 is discharged via the LC resonator 12 and the primary windings 31a and 31b of the current transformer 31, and the input / output terminals 14-1 and 14-2 are short-circuited, resulting in an excessive abnormal current. It is discharged and excessive abnormal voltage is suppressed. Thereby, since abnormal voltage and abnormal current do not enter the matching transformer 22 side, the matching transformer 22 can be protected from burning and the like, and the cables 25-1, 25-2 and the ATC transceiver 26 are also burned. Can be protected from.

  However, when an excessive abnormal voltage or abnormal current occurs, the protective device 13 is discharged via the LC resonator 12 and the primary windings 31a and 31b of the current transformer 31, and the excessive abnormal voltage is suppressed. Therefore, it is necessary to ensure the safety by setting the withstand voltage and current withstand characteristics of the LC resonator 12, the current transformer 31 and the protective device 13 large.

(Configuration of Example 5)
FIG. 5 is a schematic configuration diagram of a non-insulated track circuit protector showing Embodiment 5 of the present invention. Elements common to those in FIG. 1 showing Embodiment 1 are denoted by common reference numerals. Yes.

  In the non-insulated track circuit protector of the fifth embodiment, a new second protector 20A is connected to the input / output terminals 24-1 and 24-2 of the second protector 20 of the first embodiment. The protector 20A is connected to the ATC transmitter / receiver 26 via the first cables 25-1 and 25-2. The protector 20A includes two pairs of input / output terminals 21-1A and 21-2A, input / output terminals 24-1A and 24-2A, a matching transformer 22A, and a plurality of second protective devices (for example, a discharge device). And two arresters having gaps) 23-1A and 23-2A.

  The input / output terminals 21-1A and 21-2A are connected to the input / output terminals 24-1 and 24-2 of the protector 20, respectively. The primary windings of the arrester 23-1A and the matching transformer 22A are connected in parallel to the input / output terminals 21-1A and 21-2A, respectively. A lightning tube 23-2A is connected in parallel to the secondary winding of the matching deformer 22A, and input / output terminals 24-1A and 24-2A are connected to both ends of the secondary winding. The lightning arrester 23-2A protects the final stage of noise entering the first cables 25-1 and 25-2. The input / output terminals 24-1A and 24-2A are connected to the ATC transceiver 26 via the first cables 25-1 and 25-2.

  For example, when the connection point of the first cables 25-1 and 25-2 and the connection point to the first and second track circuits 1-i and 2-j are separated by a long distance (for example, about 100 m) In the configuration of the first embodiment, a long cable enters a low-impedance location, and transmission loss of a signal wave used for detecting a train line and transmitting / receiving information to / from the train TR increases. Therefore, in the fifth embodiment, the protectors 10 and 20 are installed in the vicinity of the first and second track circuits 1-i and 2-j, and the protector 20A is connected to the protector 20 via a long cable. And the protector 20A is connected to the branch points of the first cables 25-1 and 25-2. With the protector 20A, the output impedance of the protectors 10 and 20 and the cable impedance are matched to minimize the transmission loss of the signal wave. Other configurations are the same as those of the first embodiment.

(Operation / Effect of Example 5)
When a ground accident occurs in the feeder system used for the train power supply or when the track circuit breaks or the like, an excessive abnormal voltage is generated between the first and second track circuits 1-i and 2-j. Or excessive abnormal current flows. Then, in the first protector 10, the protective device 13 is discharged via the LC resonator 12, the input / output terminals 14-1 and 14-2 are short-circuited, and an excessive abnormal current is discharged. Abnormal voltage is suppressed. Thereby, since abnormal voltage and abnormal current do not enter the second protector 20, 20A side, the protector 20, 20A can be protected from burning and the like, and the cables 25-1, 25-2 and the ATC transceiver 26 can also be protected from burning and the like. Moreover, since the second protector 20 and 20A can be protected by the protective device 13, the withstand voltage and current withstand characteristics of these protectors 20 and 20A can be reduced, thereby reducing the size of the non-insulated track circuit protector. Can be

  In particular, since the second protectors 20 and 20A have the two-stage matching transformers 22 and 22A, the protection capability against abnormal voltage and abnormal current is improved as compared with the first embodiment. The cables 25-1, 25-2 and the like can be reliably protected. In addition, the transformer 22A can minimize the transmission loss of the signal wave.

(Configuration of Example 6)
FIG. 6 is a schematic configuration diagram of a non-insulated track circuit protector showing a sixth embodiment of the present invention, and is common to the elements in FIG. 2 of the second embodiment and the elements in FIG. 5 of the fifth embodiment. The code | symbol is attached | subjected.

  In the non-insulated track circuit protector of the sixth embodiment, the second protector 20A of the fifth embodiment is connected to the second protector 20 of the second embodiment, and this protector 20A is connected to the first cable. It is connected to the ATC transceiver 26 via 25-1 and 25-2. Other configurations are the same as those of the second embodiment.

(Operation / Effect of Example 6)
When a ground accident occurs in the feeder system used for the train power supply or when the track circuit breaks or the like, an excessive abnormal voltage is generated between the first and second track circuits 1-i and 2-j. Or excessive abnormal current flows. Then, in the first protector 10, the protective device 13 is discharged via the LC resonator 12, the input / output terminals 14-1 and 14-2 are short-circuited, and an excessive abnormal current is discharged. Abnormal voltage is suppressed. As a result, abnormal voltage and abnormal current do not enter the second protector 20, 20A and the third protector 30. Therefore, the protector 20, 20A, 30 can be protected from burning and the like, and the cable 25- 1, 25-2, 34-1 and 34-2 and the ATC transceiver 26 can also be protected from burning and the like. Moreover, since the second protector 20, 20A and the third protector 30 can be protected by the protective device 13, the withstand voltage and current withstand characteristics of these protectors 20, 20A, 30 can be reduced. As in the second and fifth embodiments, the non-insulated track circuit protector can be reduced in size.

(Configuration of Example 7)
FIG. 7 is a schematic configuration diagram of a non-insulated track circuit protector showing a seventh embodiment of the present invention, and is common to the elements in FIG. 3 of the third embodiment and the elements in FIG. 5 of the fifth embodiment. The code | symbol is attached | subjected.

  In the non-insulated track circuit protector of the seventh embodiment, the second protector 20A of the fifth embodiment is connected to the second protector 20 of the third embodiment, and this protector 20A is connected to the first cable. It is connected to the ATC transceiver 26 via 25-1 and 25-2. Other configurations are the same as those of the third embodiment.

(Operation / Effect of Example 7)
The non-insulated track circuit protector of the seventh embodiment has substantially the same operations and effects as the third and fifth embodiments. In particular, since the second protector 20, 20A side has the two-stage matching transformers 22, 22A, the protection capability from abnormal voltage and abnormal current as in the third and fifth embodiments. Thus, the cables 25-1, 25-2 and the like can be reliably protected.

(Configuration of Example 8)
FIG. 8 is a schematic configuration diagram of the non-insulated track circuit protector showing the eighth embodiment of the present invention, and is common to the elements common to the elements in FIG. 4 of the fourth embodiment and FIG. 5 of the fifth embodiment. The code | symbol is attached | subjected.

  In the non-insulated track circuit protector of the eighth embodiment, the second protector 20A of the fifth embodiment is connected to the second protector 20 of the fourth embodiment, and this protector 20A is connected to the first cable. It is connected to the ATC transceiver 26 via 25-1 and 25-2. Other configurations are the same as those in the fourth embodiment.

(Operation / Effect of Example 8)
The uninsulated track circuit protector according to the eighth embodiment has substantially the same operations and effects as the fourth and fifth embodiments. In particular, since the second protector 20, 20A side has the two-stage matching transformers 22, 22A, the protection capability from abnormal voltage and abnormal current is the same as in the fourth and fifth embodiments. Thus, the cables 25-1, 25-2 and the like can be reliably protected.

(Modification)
The present invention is not limited to the above-described embodiments, and various usage forms and modifications are possible. For example, the following forms (a) to (d) are used as the usage form and the modified examples.

  (A) FIG. 9 is a block diagram of a protective device provided in the first protector 10, 10A, 10B shown in FIGS. In this protective device 13A, two arrester tubes 13a and 13b are connected in series, and continuity blocking resistors 13c and 13d are connected in parallel to the respective arrester tubes 13a and 13b. The term “continuous current” refers to a phenomenon in which when a surge arrester operates with an abnormal voltage, the discharge continues with the connected supply voltage even after the abnormal voltage disappears. Even when such a protective device 13A is used, the same effect as the protective device 13 of the embodiment can be obtained, and the continuity can be interrupted by the resistors 13c and 13d.

  (B) FIG. 10 is another configuration diagram of the protective device provided in the first protector 10, 10A, 10B shown in FIGS. In this protective device 13B, three lightning arresters 13a, 13b, 13e are connected in series, and each of the lightning arresters 13a, 13b, 13e is connected in parallel with resistors 13c, 13d, 13f for interrupting the continuity. Has been.

  In the first protector 10, 10A, 10B provided near the boundary point between the first and second track circuits 1-i, 2-j, the protective device 13 is composed of two arrester tubes 13a, 13b. However, since the first protectors 10, 10A, 10B are provided at positions that are easily affected by abnormal voltage or abnormal current, a plurality of high current withstand current arresters (for example, about two to five, High reliability can be ensured by using 3).

  (C) The first protector 10 shown in FIGS. 1 and 5 may be replaced with the first protectors 10A and 10B shown in FIGS. 3, 4, 7, and 8.

  (D) In the embodiment, the protective devices 13a, 13b, 23, 23-1A, 23-2A, 32 having a discharge gap are used as the protective device. Other protective elements such as elements (SSPD) may be used.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram of the non-insulated track circuit protector which shows Example 1 of this invention. It is a schematic block diagram of the non-insulated track circuit protector showing Example 2 of the present invention. It is a schematic block diagram of the non-insulated track circuit protector showing Example 3 of the present invention. It is a schematic block diagram of the uninsulated track circuit protector which shows Example 4 of this invention. It is a schematic block diagram of the non-insulated track circuit protector showing Example 5 of the present invention. It is a schematic block diagram of the non-insulated track circuit protector showing Example 6 of the present invention. It is a schematic block diagram of the non-insulated track circuit protector showing Example 7 of the present invention. It is a schematic block diagram of the non-insulated track circuit protector showing Example 8 of the present invention. It is a block diagram of the protection device provided in the 1st protector shown in FIGS. It is another block diagram of the protection device provided in the 1st protector shown in FIGS.

Explanation of symbols

1-i, 2-j First and second non-insulated track circuits 10, 10A, 10B First protector 12 LC resonator 13, 13A, 13B Protection device 20, 20A Second protector 22, 22A 23, 23-1A, 23-2A, 32 Discharge tube 25-1, 25-2 1st cable 26 ATC transceiver 30 3rd protector 31 Current transformer 34-1 34-2 2nd cable 35 Monitor device

Claims (13)

An extraction circuit connected to a boundary point of the first and second non-insulated track circuits laid in parallel and extracting a signal wave flowing on the first non-insulated track circuit; and the first and second A first protector having a first protective device for suppressing an excessive abnormal voltage generated between the non-insulated track circuits and discharging an excessive abnormal current;
A second protector connected to the first protector and transferring the signal wave extracted by the extraction circuit to the automatic train control transceiver on the apparatus side via the first cable;
A non-insulated track circuit protector. The first protector is:
The extraction circuit connected to a boundary point of the first non-insulated track circuit;
The first protection device connected between the extraction circuit and the second non-insulated track circuit;
The second protector is
The signal wave connected to the first protection device and extracted by the extraction circuit is transferred to the automatic train control transceiver on the apparatus side via the first cable, and the first and The non-insulated track circuit protector according to claim 1, further comprising a single stage or a plurality of stages of transformers connected in parallel to match impedances of the second uninsulated track circuit side and the device side. The first protector is:
The first protection device connected between the boundary points of the first and second non-insulated track circuits, and the extraction circuit connected to the boundary points of the first non-insulated track circuit,
The second protector is
Connected to the extraction circuit and the second non-insulated track circuit, and transfers the signal wave extracted by the extraction circuit to the automatic train control transceiver on the apparatus side via the first cable. And a single stage or a plurality of stages of transformers connected in parallel to match impedances of the first and second non-insulated track circuit sides and the device side. Insulated track circuit protector. The protector for an uninsulated track circuit according to claim 1,
A difference between train currents flowing through the first and second non-insulated track circuits and an automatic train control current transmitted and received are detected by the first protector, and the detected current is converted into a voltage. A third protector having a current transformer for delivery to the monitoring device via a cable;
A non-insulated track circuit protector. The first protector is:
The extraction circuit connected to a boundary point of the first non-insulated track circuit;
The first protection device connected between the extraction circuit and the second non-insulated track circuit;
The current transformer in the third protector is:
A primary winding connected to the first protective device;
A secondary winding corresponding to the primary winding,
The second protector is
The automatic train connected to the first protective device via the primary winding of the current transformer and extracted by the extraction circuit is used for the automatic train on the device side via the first cable. And a single stage or a plurality of stages of transformers connected in parallel to match impedances of the first and second non-insulated track circuit sides and the device side, while transferring to the control transceiver. The uninsulated track circuit protector according to claim 4. The first protector is:
The first protection device connected between the boundary points of the first and second non-insulated track circuits, and the extraction circuit connected to the boundary points of the first non-insulated track circuit,
The current transformer in the third protector is:
A primary winding connected to the extraction circuit and the second non-insulated track circuit;
A secondary winding corresponding to the primary winding,
The second protector is
The signal wave extracted by the extraction circuit is connected to the extraction circuit and the second non-insulated track circuit via the primary winding of the current transformer, via the first cable. A single-stage or multi-stage transformer connected in parallel to transfer to the automatic train control transceiver on the apparatus side and to match the impedance between the first and second non-insulated track circuit side and the apparatus side The non-insulated track circuit protector according to claim 4. The first protector is:
The extraction circuit connected to a boundary point of the first non-insulated track circuit;
The first protective device connected between the extraction circuit and the second non-insulated track circuit via the primary winding of the current transformer in the third protector,
The current transformer in the third protector is:
The primary winding and a secondary winding corresponding to the primary winding;
The second protector is
The signal wave connected to the first protection device and extracted by the extraction circuit is transferred to the automatic train control transceiver on the apparatus side via the first cable, and the first and 5. The non-insulated track circuit protector according to claim 4, further comprising a single stage or a plurality of stages of transformers connected in parallel to match impedance between the second uninsulated track circuit side and the device side. The extraction circuit includes:
The non-insulated track circuit protector according to any one of claims 1 to 7, wherein the protector is configured by an LC resonator in which a capacitor and a coil are connected in series. The first protective device is:
The non-insulated track circuit protector according to any one of claims 1 to 7, wherein the protector is constituted by a plurality of lightning arresters connected in series. The second protector is
The non-insulated track circuit protector according to any one of claims 1 to 7, further comprising a second protective device connected in parallel to the secondary winding of the transformer. The second protective device is
The non-insulated track circuit protector according to claim 10, comprising a lightning arrester. The third protector is
The non-insulated track circuit protector according to any one of claims 4 to 7, further comprising a third protective device connected in parallel to the secondary winding of the current transformer. The third protective device is:
The non-insulated track circuit protector according to claim 12, wherein the protector is constituted by a lightning arrester.

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