JPH0826111A - Short-circuiting device for track circuit - Google Patents

Abstract

PURPOSE:To easily confirm thc normal short circuit by displaying the short circuit confirmation of a short-circuiting device for a track circuit. CONSTITUTION:In a short-circuiting device for a track circuit to achieve the short-circuiting between rails by a short-circuiting device 2 and a short-circuiting line 4, a voltage terminal 5 is connected to the rails in addition to the short- circuiting device to short-circuit the rails to measure the voltage between the rails and the short-circuiting current from a current sensor 6 connected to the short-circuiting line. After the values are converted to the direct current by an AC/DC converter 7, the short-circuiting resistance is calculated by a divider 9, and the normal short circuit is displayed when the value is below the prescribed value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention enables safe work by short-circuiting a track circuit for track maintenance work, etc., and putting the track circuit in the "yes" state of the train to turn the signal red. The present invention relates to a track circuit short circuit device.

[0002]

2. Description of the Related Art When a track circuit is short-circuited during track maintenance work, etc., a track circuit short-circuit device is used to short-circuit the track circuit, and the track circuit current is used to determine whether or not the track circuit has been short-circuited. The current comparison method is used to confirm that the circuit current ratio is above a certain value.

In this current comparison method, the track circuit short-circuit device is shown in FIG.
As shown in FIG. 1, a set of short-circuit elements 3 for short-circuiting the rail 1, a short-circuit wire 4, a current coil 12 for measuring the rail current before and after the short-circuit element, and a voltmeter 13 for measuring the induced voltage of the current coil 12.
It is composed of a short-circuit device body 2 having a built-in. When the ratio of the two voltmeters 13 is a certain value or more, it is determined that the short-circuit state of the short circuiter is normal.

[0004]

In the current comparison method, the short-circuit state can be confirmed by the short-circuiting device itself, but since two sets of current coils and voltmeters are required, the circuit becomes complicated and the reliability becomes low.
There are drawbacks in that the battery is largely consumed, the size of the short circuiter is increased, and the weight is increased.

The present invention has been made to solve such disadvantages, and it is possible to confirm that the short-circuit device has surely short-circuited the rails with the short-circuit device, and to realize a small size and light weight. It is intended.

[0006]

According to the present invention, rails are short-circuited by a short-circuit and a short-circuit line, a voltage terminal measures a rail-to-rail voltage close to the short-circuit, and a current sensor measures a current of the short-circuit line. Then, the AC / DC converter converts the voltage and current from AC to DC, the divider divides the current value from the voltage value to obtain the short-circuit resistance, and the indicator indicates that the short-circuit is normal when the short-circuit resistance is below a certain value. If the short-circuit resistance obtained by displaying and dividing the rail-to-rail voltage and the short-circuit current at the time of short circuit is less than a certain value, it has the function of displaying normal short circuit. In addition, the short-circuit between rails and the voltage terminal for measuring the voltage between rails are stored in one molded product,
In order to measure the rail-to-rail voltage and the short-circuit current, the switching device simultaneously switches the input and output of the AC / DC converter according to the instruction of the switching controller. The switching controller controls the switching device, and the level holding circuit holds the DC level when the switching controller is selected. Moreover, since only one AC / DC converter is required to switch the voltage and current from AC to DC, the circuit configuration is simplified.

[0007]

1 is a block diagram showing an embodiment of the present invention. As shown in the figure, the short-circuit device short-circuits the rails with the short-circuit element 3 and the short-circuit wire 4. In order to confirm that the short circuit has been made surely, measure the rail-to-rail voltage and the short-circuit current, find the short-circuit resistance that the short-circuit device is actually short-circuiting, and display the short-circuit normal indication when the value is below a certain value. To do.

The rail-to-rail voltage is measured by bringing the voltage terminal 5 into contact with the rail, and the short-circuit current is measured by the current sensor 6 inserted in the short-circuit wire 4. The voltage / current component is converted into direct current by the AC / DC converter 7.

In the track circuit of the electrified section, since the electric car current also flows on the rail in a superimposed manner, the voltage / current component to be measured contains a lot of noise components other than the signal component, and the short-circuit resistance cannot be measured accurately, so AC / DC conversion is performed. A bandpass filter for removing noise components other than signal components is inserted in the circuit 7.

Voltage and current level holding circuit 8
The output of is input to the divider 9 and the short circuit resistance is obtained by dividing the voltage by the current.

The obtained short circuit resistance is input to the display circuit 10, and when the short circuit resistance is below a certain value, a normal short circuit is displayed. If the short-circuit resistance is larger than the set value, the short-circuit failure is displayed or is not displayed. By doing so, when the rail circuit short-circuit device short-circuits the rails, it is possible to determine whether or not the short-circuit is normal.

Since the short-circuit element and the voltage terminal are independently connected to the rails of the track circuit, the rail-to-rail short circuit due to the short-circuit element is not normal, and when the contact resistance becomes large, the rail-to-rail voltage becomes large, and Since the short-circuit current is measured to be small, the short-circuit resistance obtained by dividing the rail-to-rail voltage by the short-circuit current becomes large, and the short-circuit failure can be detected.

By accommodating the short-circuit element and the voltage terminal in one molded product, it is possible to simultaneously perform the short-circuit between the rails and the attachment of the voltage terminal by one short-circuiting operation, which facilitates the handling and is easy to carry. It will be easy.

In the case of FIG. 1, the AC / DC converter 7 has a voltage,
Two pieces are required to measure each component of the current, but one piece is obtained by alternately switching between the switching controller 12 and the switching device 10 as shown in FIG. 2 and holding the DC value by the level holder 11. It is possible to That is, the input and output of the AC / DC converter 7 are simultaneously switched by the switch under the control of the switch controller 12, and the voltage and the current are alternately selected. When the voltage is selected, the voltage component is converted from alternating current to direct current, and the direct current value is held in the voltage level holding circuit 11. When a current is selected, the current component is converted from alternating current to direct current, and the direct current value is held in the current level holding circuit 11.

When various signal currents are flowing in the track circuit, and when it is desired to short-circuit only a specific frequency, a resonator 15 composed of a coil and a capacitor is inserted between the short-circuit wires 4 as shown in FIG. .

[0016]

INDUSTRIAL APPLICABILITY The train detection of the track circuit is set so that the short-circuit resistance value of 0.06Ω or less can be surely detected. Therefore, rather than the train detection of the current comparison method due to the ratio of the track circuit current using the track circuit current being a certain value or more, the set value of the short circuit display of the short circuiter is set to 0.06Ω and the track circuit is short circuited. The train detection by the device of the present invention of the method can be confirmed more directly. Further, in the case of the device according to the present invention, since the components of the device can be made small, the size and weight can be reduced, the reliability is improved, and the battery consumption is reduced.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a track circuit short-circuit device.

FIG. 2 is an explanatory diagram of a system in which two AC / DC converters are combined into one by a switching controller, a switching device, and a level holder.

FIG. 3 is an explanatory view of a conventional track circuit short circuiter.

FIG. 4 is an explanatory diagram when a resonator is inserted to short-circuit only a specific frequency.

[Explanation of symbols]

 1 rail 2 track circuit short-circuit body 3 short-circuit element 4 short-circuit wire 5 voltage measuring terminal 6 short-circuit wire current sensor 7 AC / DC converter 8 divider 9 indicator 10 switching device 11 level holding circuit 12 switching controller 13 rail current sensor 14 Voltmeter 15 Resonator

Claims (3)

[Claims] 1. A track circuit short-circuit device for short-circuiting between rails with a short-circuit and a short-circuit wire, wherein the voltage terminal measures the rail-to-rail voltage close to the short-circuit element, and the current sensor is The current is measured, the AC / DC converter converts voltage and current from AC to DC, and the divider calculates the short-circuit resistance by dividing the current value from the voltage value. Indicates that the short-circuit is normal when the short-circuit resistance is below a certain value.If the short-circuit resistance obtained by dividing the rail-to-rail voltage and the short-circuit current at the time of short-circuit is less than a certain value, the function to display the normal short-circuit is displayed. A track circuit short-circuit device characterized by having. 2. The track circuit short-circuiting device according to claim 1, wherein the rail-to-rail short-circuit element and the rail-to-rail voltage measuring voltage terminal are housed in a single molded product. 3. The switching device switches the input and output of the AC / DC converter at the same time according to an instruction from the switching controller to measure the rail-to-rail voltage and the short-circuit current, and the switching controller controls the switching device. The level holding circuit holds the DC level when the switching controller is selected. The voltage and current are switched by the switching controller with one AC / DC converter, and alternately switched to DC. 2. The track circuit short-circuiting device according to claim 1, wherein the voltage value and the current value are obtained by converting and holding the values in respective level holding circuits.