JPH06105275B2 - Train line disconnection detection device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an apparatus for detecting disconnection of a train line.

[Prior Art] An electric power line including a suspension wire and a trolley wire may be disconnected due to electrical damage, corrosion, etc. due to vibration fatigue, mechanical wear, arc discharge and the like.

When a train enters such a disconnection point, a large amount of damage is often caused to a current collector such as a pantograph on the train side and overhead line equipment. When such an accident occurs, the train is often stuck for a long time and a great deal of labor is required for restoration, which may cause a socially serious accident.

Therefore, when a train line disconnection accident occurs, it is necessary to immediately know this and stop the train from entering the disconnection accident site in advance. In particular, when a disconnection accident occurs in a place where recovery work is difficult, such as in a long tunnel or the Honshi connecting bridge, it is absolutely necessary to avoid entering trains at these disconnection sites.

Conventionally, as a means of detecting a wire breakage accident, when a trolley wire is manufactured, an electric wire that is electrically insulated from the trolley wire is built in along the lengthwise direction, and after the trolley wire is installed, this electric wire is installed. A means for detecting the disconnection of the trolley wire is proposed by disconnecting the alarm wire when the trolley wire is disconnected by using a signal current flowing through it as an alarm wire.

However, according to the above-mentioned means, since the alarm wire electrically insulated from the trolley wire must be built in the trolley wire along the longitudinal direction, it takes a lot of time and effort to manufacture and the manufacturing cost becomes extremely high. Moreover, since the trolley wire is a consumable item that is worn away by the passage of the pantograph, it needs to be replaced after a predetermined period of use. At this time, the signal alarm line is also replaced at the same time, which increases the running cost.

Moreover, even if this thing can be applied to a trolley wire, there is also a problem that it cannot be used for a suspended overhead wire.

By the way, in an electric train line, an overhead line including a trolley wire is usually divided at intervals of 1500 m or less, and both ends of each line are retained. Although various structures are known as a retaining means for the one-division zone, most of them use a tension adjusting device to keep the tension of the trolley wire constant and the sliding contact resistance of the pantograph stable. There is. This tension adjusting device automatically absorbs the thermal expansion and contraction of the suspension overhead wire and the trolley wire due to the temperature change, and keeps the tension of the trolley wire constant.

When the suspension wire or the trolley wire is broken, the tension is naturally reduced to a value of zero or close to this. Therefore, in the tension adjusting device, when the suspension wire or the trolley wire is broken, an extreme displacement is shown. Therefore, by checking the tension adjusting device, it is possible to know the breakage of the suspension wire or trolley wire in the area.

[Problems to be solved by the invention]

However, in order to know the disconnection of the suspension wire or trolley wire by checking the tension adjusting device, it is limited to the inspection such as the surveillance staff looking around the site such as during maintenance patrol work, and the disconnection can be done remotely. I can't know.

Moreover, since the tension adjusting device is displaced in order to automatically absorb the thermal expansion and contraction of the suspended overhead wire and trolley wire due to the temperature change, it is not always necessary to show an extreme displacement. It is not possible to determine that the cause is the disconnection of the train, and there are cases where it absorbs thermal expansion and contraction due to temperature changes. Therefore, it is not possible to determine the disconnection of the electric power line only by examining the tension adjustment device. There is.

In the present invention, the displacement within the permissible range of expansion and contraction due to temperature change is not judged to be a broken electric line, but the displacement beyond the permissible range is judged to be a broken electric line. Moreover, it is an object of the present invention to provide a train line disconnection detection device that can be immediately known remotely and when a disconnection occurs.

[Means for solving problems]

The present invention relates to a change amount detection device that detects a change in tension of a train line or an expansion / contraction displacement amount based on a change in tension, and outputs an electric signal corresponding to the change amount of the tension or the expansion / contraction amount, and an air temperature to detect the change in temperature. In response to the temperature sensor that emits an electrical signal according to the change amount detection device and the signal sent from the temperature sensor, it is determined whether the tension or the amount of expansion / contraction of the train line according to this temperature is in an appropriate range. However, it is characterized by comprising a computer for judging that the electric power line is broken when the amount of change exceeds an appropriate range, and an output device for outputting the result judged by this computer.

[Action]

According to the present invention, the change amount detecting device detects the tension change of the trolley wire or the expansion / contraction displacement amount based on the change in tension, the temperature sensor detects the temperature, and the change amount detecting device and the temperature sensor send the temperature. A signal is introduced into a computer, and the computer calculates an appropriate amount of tension or expansion / contraction of the trolley wire according to the temperature at that time, compares the appropriate value with the actual displacement amount measured above, and measures by this. It is determined whether or not the amount of displacement indicates disconnection, and the result of this determination is displayed on the output device. Therefore,
Since the judgment is made by correcting the amount of change due to the temperature, it is possible to definitely know whether or not there is a disconnection, and it is possible to remotely know the disconnection of the train line even if you are not at the site, and a disconnection occurs Then you can know immediately.

〔Example〕

The present invention will be described below based on the first embodiment shown in FIGS. 1 to 6.

In general, as shown in FIG. 1, an overhead line including a trolley wire is divided at intervals of 1500 m or less, and both ends of the train track are retained. A tension adjusting device is used as a retaining means at both ends in order to keep the tension of the trolley wire constant and maintain the sliding contact resistance of the pantograph in a stable state. This tension adjusting device is shown in FIGS. 2 and 3.

That is, 1 is a pillar as a train line support structure,
An end of the suspension overhead wire 3 is connected to the upper portion via a tension arm 2.

A support shaft 6 is supported on the support column 1 by support arms 4 and 5, and a large pulley 7 and a small pulley 8 are rotatably supported on the support shaft 6 so as to rotate integrally with each other.

One end of a trolley wire 9 is wound around and connected to the small pulley 8, and one end of a tension wire 10 is wound around and connected to the large pulley 7. The other end of the tension wire 10 is connected to the balance weight 11. Balance weight 11
Is guided by the guide rods 12 and 12 so as to be slidable in the vertical direction.
Are fixed to the column 1 by brackets 13 and 14.

The load of the balance weight 11 is applied to the large pulley 7 by the tension wire 10, and a torque based on the radius of the large pulley 7 and the load of the balance weight 11 is applied. On the other hand, the tension of the trolley wire 9 is applied to the small pulley 8, and a torque based on the radius of the small pulley 8 and the tension of the trolley wire 9 is applied. Therefore, the torque acting on the large sheave 7 and the torque acting on the small sheave 8 are in equilibrium with each other, thereby giving a predetermined tension to the trolley wire 9.

Then, when the trolley wire 9 is extended, for example, based on the change in temperature, the balance weight 11 is lowered and the trolley wire 9 is moved.
When the trolley wire 9 contracts, the balance weight 11 rises to keep the tension of the trolley wire 9 constant. Therefore, a change in tension of the trolley wire 9 due to a change in temperature is prevented, the tension of the trolley wire 9 is kept constant, and good sliding contact performance with the pantograph is maintained.

A displacement gauge 15 for detecting the amount of movement of the balance weight 11 is attached to the one bracket 14 described above. The displacement meter 15 is adapted to generate an electric signal having a value corresponding to the position of the balance weight 11 in the vertical direction, and the electric signal is supplied via a lead wire 16 to a processing unit of the main control room 20.
Connected to 21.

A temperature sensor 18 is attached to the column 1 via another bracket 17. The temperature sensor 18 emits an electric signal according to the temperature and sends it to the processing unit 21 of the central control room 20.

The displacement meter 15 and the temperature sensor 18 constitute a measuring unit 22.

As shown in FIG. 4, the processing unit 21 in the central control room 20 includes a microcomputer 25 and a display unit 26 including an alarm device as an output unit.

The microcomputer 25 operates as shown in the flowchart described later, and the display device 26 operates in response to this.

The operation of the above embodiment will be described with reference to the drawings of FIGS. 5 and 6.

First, the operation of the displacement meter 15 will be described. As described above, the balance weight 11 of the tension adjusting device moves up and down in order to absorb the thermal expansion and contraction of the trolley wire 9 due to the change in temperature. The vertical position of the weight 11 changes in proportion to the temperature. Therefore, the movement of the balance weight 11 is as shown in the characteristic diagram of FIG. That is, in FIG. 5, a certain predetermined temperature θ ₀
The vertical position of the balance weight 11 at that time is set as the origin of the XY coordinates, and the X axis is shown as plus in the direction in which the air temperature rises, and the Y axis is shown as plus in the direction in which the balance weight 11 is lowered. When the temperature rises above the set temperature θ ₀ , the balance weight 11 moves downward, and the moving distance L is represented by L = 1 (1 + αθ).

However, l; position of the balance weight 11 at the set temperature θ ₀ α: coefficient of linear expansion of trolley wire θ: increased temperature.

Since the movement of the balance weight 11 of this type usually has variations, the range ± δ of this operation variation can be regarded as a permissible range of a normal range.

Therefore, when the trolley wire is not broken when the temperature is θ, the theoretical moving distance L of the balance weight 11 is
Is in the region of L = 1 (1 + αθ) ± δ. In other words, if the moving distance of the balance weight 11 is within the range of L = 1 (1 + αθ) ± δ when the temperature is θ, it can be determined that the trolley wire is not broken.

On the other hand, when the trolley wire is broken when the temperature is θ, the balance weight 11 largely descends, so that the moving distance L of the balance weight 11 is L> l (1 + αθ) + δ
It becomes the area of. Therefore, when the moving distance L of the balance weight 11 is in the region of L> l (1 + αθ) + δ when the temperature is θ, it can be determined that the trolley wire is broken.

Based on such characteristics, the microcomputer 25 is set to perform the processing shown in the flow chart of FIG.

That is, the electric signals from the displacement meter 15 and the temperature sensor 18 are input to the microcomputer 25. The microcomputer 25 knows the moving distance L of the balance weight 11 from the signal from the displacement meter 15, and the temperature sensor 18 outputs the signal. Know the temperature θ from the signal.

The microcomputer 25 calculates the theoretical moving distance L ₀ of the balance weight 11 based on the temperature θ. Then, the theoretical movement distance L ₀ is compared with the actual measurement value L obtained from the displacement meter 15.

If the measured value L> theoretical value L ₀ , the moving distance of the balance weight 11 exceeds l (1 + αθ) + δ, so it is determined that the trolley wire is broken, and a warning is displayed on the display device 26. Send a signal. In the display device 26, the disconnection of the trolley wire is displayed by sound or blinking of the brightness,
And a stop signal is sent to the train approaching this disconnection site.

According to the apparatus of such an embodiment, it is possible to know the disconnection of the trolley wire remotely without being at the disconnection site and also to know immediately when the disconnection occurs, and the train that is approaching the disconnection site. You can also send an emergency signal to and stop immediately.

In the above embodiment, the balance weight type tension adjusting device is used to detect the disconnection of the trolley wire, but the present invention is not limited to this, and the spring type tension adjusting device as shown in FIGS. 7 and 8 is used. A device may be used.

That is, in the spring tension adjusting device, a spring (not shown) is spanned between the outer cylinder 70 and the inner cylinder 71, which are extendably connected to each other, and accommodated therein.
And the inner cylinder 71 are urged in a direction to shorten each other. Outer cylinder 70
Is connected to the column 1, and the inner cylinder 71 is connected to the trolley wire 9. When the trolley wire 9 expands and contracts due to changes in temperature, the outer cylinder 70 and the inner cylinder 71 expand and contract with each other to keep the tension of the trolley wire 9 constant.

In the present embodiment, a displacement gauge 15 is provided between the outer cylinder 70 and the inner cylinder 71 to measure the relative displacement of these.

Even in this case, the same operation as that of the first embodiment is achieved.

Further, in each of the above-described embodiments, the disconnection of the trolley wire is detected by the displacement amount of the tension adjusting device, but the present invention is the ninth embodiment.
As shown in the figure, the trolley wire 9 directly attached to the column 1
Alternatively, the tension of the suspension overhead wire 3 may be directly measured.

Further, in addition to the trolley wire 9, the present invention can detect disconnection of the suspension overhead wire 3 and the like.

〔The invention's effect〕

As described above, according to the present invention, the amount of tension or expansion / contraction of an appropriate electric train line according to the temperature at that time is calculated, and the amount of displacement measured by comparing this appropriate value with the actual amount of displacement measured It is judged whether or not the wire is broken, and the result of this judgment is displayed on the output device.Therefore, the judgment is made by correcting the amount of change due to temperature, so it is possible to know whether or not the wire is broken. it can. Moreover, it is possible to remotely know the disconnection of the train line without being at the site, and it is also possible to immediately know when the disconnection occurs, and it is possible to prevent the expansion of the accident due to the train entering the site of the disconnection. it can.

[Brief description of drawings]

1 to 6 show a first embodiment of the present invention, FIG. 1 is an explanatory view schematically showing the whole electric line disconnection detecting device, and FIG. 2 is a configuration of a balance weight type tension adjusting device. Fig. 3 is an enlarged view of the main part, Fig. 4 is a system diagram, Fig. 5 is a characteristic diagram of a balance weight type tension adjusting device, Fig. 6 is a flow chart, and Figs. 7 and 8 show the present invention. 7 shows a second embodiment of the present invention, FIG. 7 is a block diagram of a spring tension adjusting device, FIG. 8 is an enlarged view of the main part thereof, and FIG.
The figure is a diagram showing the structure of the overhead line of the column directly attached type showing the third embodiment of the present invention. 1 ... Support post, 3 ... Suspension line, 7 ... Large pulley, 8 ... Small pulley, 9 ... Trolley wire, 11 ... Balance weight, 15 ...
Displacement meter, 18 ... Temperature sensor, 20 ... Central control room, 21 ...
Processing device, 25 ... Microcomputer, 26 ... Output display device.

Claims (1)

[Claims] 1. A change amount detecting device for detecting a change in tension of a train line or an amount of expansion / contraction based on a change in tension and for emitting an electric signal corresponding to the tension or the amount of expansion / contraction, and an electric amount corresponding to the temperature for detecting a change in temperature. The temperature sensor that emits a dynamic signal and the signals sent from the change amount detection device and the temperature sensor are received to judge whether the tension or the amount of expansion or contraction of the train line according to this temperature is in an appropriate range. A computer that judges that the train line is broken when the value exceeds the appropriate range,
An electric wire breakage detection device comprising an output device for outputting a result determined by the computer.