JPH06107047A - Tension measuring device for railroad overhead wire - Google Patents

Abstract

PURPOSE:To reduce power consumption of a battery for operating a measuring apparatus and to enable the apparatus to automatically measure and record a change of tension of a railroad overhead wire due to temperature change. CONSTITUTION:A tension measuring device is provided with an overhead wire supporting part 6 supporting a contact wire 1, a tension detector 21 detecting the tension of the contact wire 1 and generating an electric signal, a measuring apparatus 25 converting the electric signal from the detector 21 into a luminous signal, a storage battery 29 supplying electric power to the measuring apparatus 25 mounted on the overhead wire supporting part 6, an optical fiber 31 transmitting the luminous signal converted by the measuring apparatus 25, and a recorder 35 installed on the ground and converting the signal transmitted through the optical fiber 31 to an electric signal and recording it. The measuring apparatus 25 is made to operate only for time set by a timer, thereby small power consumption of the storage battery 29 can be attained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a train line tension measuring device for automatically measuring and recording the tension of a train line, especially a trolley wire.

[0002]

2. Description of the Related Art Generally, the wave propagation velocity V of a train line is V = (T / ρ) ^{1/2 where} T is the tension of the train line and ρ is the line density.

Is calculated by For example, the cross-sectional area is 170 mm
² In the case of a trolley wire with a diameter of about 14.7 mm, the linear density ρ
Is 1.51 kg / m and the tension T is 14.7 kN, so the wave propagation velocity V is about V = 355 km / h.

By the way, when the train speed approaches the wave propagation velocity V of the trolley wire, the rate of occurrence of obstacles such as the occurrence of derailment and the increase in stress of the trolley wire rapidly increases. Therefore, the ratio of train speed to wave propagation speed (train speed /
It is said that the wave propagation velocity) is preferably 0.7 or less, and in the case of conventional lines, this value is 0.5 or less. However, in the case of the Shinkansen, the train operating speed is 2
It is approaching around 50 km / h, and the train speed / wave propagation speed ratio is approaching 0.7. For this reason, there is concern that the trolley wire may separate or the stress may increase.

Therefore, in the case of the Shinkansen, it is necessary to prevent the tension of the electric power line from decreasing. The cause of the decrease in the tension of the train line is
It is necessary to strictly maintain the initial design value for the above-mentioned tension which may change due to elongation due to changes in temperature, wear of train lines, creep elongation of train lines, etc. In particular, the decrease in tension of the trolley wire has a problem that it greatly affects the current collecting characteristics. Therefore, it is necessary to monitor the tension of the trolley wire with high accuracy in the line section where the train is operating at high speed to perform precise maintenance and management of the trolley line. It is necessary to measure with high accuracy.

[0006] Conventionally, as a method of measuring the tension of the electric power line, the tension is measured by connecting a tension measuring device such as a load cell to the trolley wire, or the sum of the tensions of the trolley wire, the suspension overhead wire and the auxiliary suspension wire is used. A method is adopted in which the inclination angle of the yoke in the retaining portion of the electric power line is measured by utilizing the fact that it is kept constant by the weight-type tension adjusting device, and the tension of each filament is calculated according to this inclination. There is.

However, in such a conventional case, a method has been used in which the tension is read by directly visually observing the inclination angle of the load cell or the yoke, and the tension is recorded to create data. In such a direct reading inspection, not only the tension during the maintenance and inspection time after the final train has passed can be read, but also the accuracy is poor and labor is required because it is a manual observation, which is a drawback. In order to solve this, it is desired to develop a device that automatically measures and records tension.

As an apparatus for automatically measuring and recording the tension, the measurement data detected by the tilt angle of the load cell or the yoke is taken out as an electric signal, and the measured data is hung by a measuring device suspended on an overhead wire support portion. A method is known in which a level electric signal is converted, sent to a display device installed on the ground, and recorded on a recording paper by a pen recorder or the like provided in this display device.

However, in order to electrically lead the signal detected by the tilt angle detector of the load cell or the yoke to the display on the ground, it is necessary to perform processing such as amplification by an amplifier, and for this purpose a power supply is required. become. When a commercial power supply on the ground side is used to supply power to the measuring instrument suspended on the overhead line part, the super high voltage of 25 kv is applied to the trolley wire, and this ultra high voltage flows back to the commercial power supply side. In order to avoid this, a special insulating transformer or high voltage resistant cable is required, and there is a concern that the structure will be complicated and expensive.

[0010]

As a countermeasure against such an ultra-high voltage, a technique of making an optical communication system using an optical fiber between a measuring instrument installed on an overhead wire supporting part and a recorder on the ground side is being researched. By connecting the measuring device on the overhead wire support side and the recorder on the ground side with an optical fiber and using an optical communication system, the high voltage overhead wire side and the low voltage ground side can be electrically cut off, and high voltage power is It will not affect the recorder. However, even in such a case, the measuring device on the side of the overhead wire support needs to be driven by electric power, and at least an operating power supply is required. It is considered to use a storage battery as the operating power source of the measuring instrument. However, if the measuring instrument is kept running all the time, there is a risk that the power supply will be exhausted prematurely.

On the other hand, the creep elongation of the trolley wire and the wear of the trolley wire, which are mentioned as the cause of the decrease in the tension of the trolley wire, change gradually in several months. You do not need to take frequent measurements. On the other hand, in the case of the change in tension of the electric power line due to the thermal expansion due to the change in temperature, the maximum tension is exhibited at the highest temperature of the day and the tension becomes the lowest, so that measurement of this state is necessary. However, the tension change due to thermal expansion due to temperature change may be measured at the highest temperature and the lowest temperature of the above day, for example, the highest temperature is around 2:00 pm and the lowest temperature is before dawn. The tension may be measured around 5 to 6 o'clock.
That is, the tension does not have to be constantly measured throughout the day.

The present invention has been made in view of the above circumstances, and an object thereof is to reduce consumption of a storage battery for operating a measuring instrument and to automatically change a tension of a train line due to a temperature change. It is an object of the present invention to provide a train line tension measuring device capable of measuring and recording.

[0013]

In order to achieve the above-mentioned object, the present invention provides an overhead line supporting portion for supporting an electric line, a tension detector for measuring an electric line tension, and an electric signal, and a ground surface. A measuring instrument that is insulated and installed on the overhead wire support, converts the electrical signal output from the tension detector into an optical signal and outputs the signal, and installs on the overhead wire support to supply operating power to the measuring instrument. A storage battery to be supplied, an optical fiber for transmitting the optical signal converted by the measuring instrument, and a recorder installed on the ground for converting the signal transmitted through the optical fiber into an electric signal and recording the electric signal In the tension measuring device of the train line,

A power supply circuit connecting the storage battery and the measuring device is provided with a timer for supplying electric power from the storage battery to the measuring device for a predetermined time and operating the measuring device only during the power supply time. .

[0015]

According to the present invention, the measuring instrument that outputs the measurement signal on the overhead line side can measure only the maximum temperature and minimum temperature time zones of the day by controlling the timer.
As a result, it is possible to reduce the burden on the drive energy source, that is, the power source, thus reducing the consumption of the storage battery as the power source and preventing the exhaustion. Then, since the train line tensions in the time zones of the highest temperature and the lowest temperature of a day are automatically measured and recorded, the data required for the maintenance and management of the train lines can be obtained with high accuracy without requiring human intervention. .

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to an embodiment shown in FIGS.

In the figure, 1 is a trolley wire, 2 is an auxiliary suspension wire, and 3 is a suspension wire. The trolley wire 1 is an auxiliary suspension wire 2
On the other hand, it is suspended substantially horizontally by a large number of hangers or droppers (not shown), and installed substantially horizontally.

The end portions of the trolley wire 1 and the auxiliary suspension wire 2 are connected to both ends of the second yoke 5. The middle point of the second yoke 5 is connected to one end of the first yoke 4, and the suspension wire 3 is connected to the other end of the first yoke 4.

An intermediate point of the first yoke 4 is connected to a weight type tension adjusting device 8 via a supporting wire 6 as an overhead wire supporting portion and an insulator 7. The deadweight type tension adjusting device 8 winds a winding wire 9 connected to the insulator 7 around a small pulley 10, and a pulling wire 12 around a large pulley 11 coaxially connected to the small pulley 10. A weight 13 is suspended from the weight 12, and when the trolley wire 1, the auxiliary suspension wire 2 and the suspension wire 3 extend due to thermal expansion or the like, the weight 13 is lowered to keep the tension constant.

When the trolley wire 1 extends more than the auxiliary suspension wire 2, the second yoke 5 rotates relatively clockwise, and the trolley wire 1 and the auxiliary suspension wire 3 compare with the suspension wire 3. When the average amount of extension of the overhead wire 2 becomes large, the first yoke 4 relatively rotates clockwise. The small pulley 10 and the large pulley 11 are supported by a column 16 via a bracket 15. Such an overhead wire structure may be the same as the conventional one.

Tension detectors, for example, load cells 21, 22 and 23 are attached to the ends of the trolley wire 1, the auxiliary suspension wire 2 and the suspension wire 3, respectively, in order to measure their tensions. As is well known, the load cell utilizes the characteristic that the strain gauge changes the electric resistance according to the strain amount. Therefore, the current changes according to the strain amount, and the tension is known by measuring this current value. be able to.

The load cells 21, 22 and 23 are connected to a measuring device (oscillator) 25. This measuring instrument 25
2, as shown in FIG. 2, an amplifier 26 for amplifying the electric signals output from the load cells 21, 22, 23, an electro-optical converter 27 for converting the electric output of the amplifier 26 into an optical signal, and the amplifier 26 and the electro-optical conversion. A timer 28 for operating the device 27 at a predetermined set time is provided. The timer 28 is provided in an energizing circuit that connects the storage battery 29 as a power source, the amplifier 26 and the electro-optical converter 27. The load cells 21, 22, 23, the amplifier 26, the electro-optical converter 27, and the timer 28 are operated by the electric power supplied from the storage battery 29. The storage battery 29 may be of the order of DC12V. It is designed to be charged by 30.

The measuring device 25 including the amplifier 26, the electro-optical converter 27 and the timer 28 is attached to the support wire 6 connecting the first yoke 4 and the insulator 7, and the storage battery 29 and the solar battery 30. Is also hung on the support wire 6 close to the measuring device 25. Therefore, the measuring device 25, the storage battery 29, and the solar battery 30 are installed at the same potential as the trolley wire 1.

An optical fiber 31 is connected to the electro-optical converter 27 of the measuring device 25. This optical fiber 31
It is pulled out to the side of the pillar 16 through the bushing 32 and guided to the ground along the pillar 16.

A recorder (receiver) 35 is installed on the ground side. The recorder 35 is, for example, a photoelectric converter 36 to which the optical fiber 31 is connected and which converts an optical signal sent from the optical fiber 31 into an electric signal, and a meter which displays a signal output from the photoelectric converter 36. 37 and a pen recorder 38 for recording this output characteristic.
The above-ground devices such as the photoelectric converter 36, the meter 37, and the pen recorder 38 are operated by the commercial power supply 39.

In such an embodiment, the measuring device 25
The timer 28 on the side operates, for example, from 5 am to 5 minutes before dawn, which is the lowest temperature, and from 5 pm, which is the highest temperature, from 2 pm to 5 minutes, and the measuring device 25 is activated only twice in the morning and the afternoon. Is set.

In the case of such a construction, for example, the trolley wire 1, the auxiliary suspension wire 2 and the suspension wire 3 expand and contract due to the temperature difference between day and night, and the tension T is lowered when the trolley wire 1, the auxiliary suspension wire 2 and the suspension wire 3 are extended. It can be detected by 22 and 23. That is, by the operation of the timer 28, the measuring instrument 25 is operated for 5 minutes from 5 am before dawn and for 5 minutes from 2 pm when the maximum temperature is reached, and the load cells 21, 22, and 23 are connected to the trolley wire 1, The tension T of the auxiliary suspension line 2 and the suspension line 3 is detected. These detection signals are amplified by the amplifier 26 and converted into optical signals by the electro-optical converter 27. This optical signal is sent to the display 35 installed on the ground side through the optical fiber 31, and the photoelectric converter 36 of this display 35 converts the optical signal into an electric signal. With this electric signal, the meter 37 displays the tension of each trolley wire 1, the auxiliary suspension wire 2 and the suspension wire 3, and at the same time, records them in the pen recorder 38.

In the case of the above-mentioned embodiment, the tensions of the trolley wire 1, the auxiliary suspension wire 2 and the suspension wire 3 are measured only twice in the morning and afternoon. It can be sufficiently grasped, and therefore, these measurement data can be utilized as data for managing the trolley lines.

As described above, since the measurement is performed only twice a day in the morning and in the afternoon and for 5 minutes each, the power consumption for driving the measuring instrument 25 attached to the overhead wire side is small. The storage battery 29 can also cover this. Moreover, since the storage battery 29 is charged by the solar battery 30, the power of the storage battery 29 is not exhausted.

From the above, the load cells 21, 2
2, 23, of course, a measuring device 25 including an amplifier 26, an electro-optical converter 27, a timer 28 and a storage battery 29,
Support wire 26 insulated from the ground and having the same potential as the trolley wire 1
Even if the voltage of the trolley wire 1 is applied to all members supported by these overhead wire supports, it is safe because it is insulated from the ground.

That is, in the case of the above-mentioned embodiment, the measuring device 25 fixed to the supporting wire 6 as the overhead wire supporting part and the recorder 35 on the ground side exchange signals by the optical communication system by the optical fiber 31. Therefore, the high voltage overhead wire side and the low voltage ground side are electrically cut off, and the ultrahigh voltage power applied to the trolley wire 1 does not adversely affect the recorder 35, and safety is ensured.

The measuring device 25 which outputs a measurement signal on the overhead line side controls only the maximum temperature and the minimum temperature time zone of the day under the control of the timer 28, whereby the driving energy source, that is, the power source. Lighten the burden,
Therefore, the storage battery 29 can be used as a power source, and consumption of the storage battery 29 is reduced. Since the storage battery 29 is electrically insulated from the ground side, the high-voltage overhead wire side and the low-voltage ground side are reliably insulated, and no special insulation measures are required.

Moreover, in the above structure, the load cells 21, 2 are provided at the ends of the trolley wire 1, the auxiliary suspension wire 2 and the suspension wire 3.
Since the measuring instrument 25, the storage battery 29, and the solar cell 30 were attached to the support wire 6 with attaching 2 and 23,
It can be configured without changing the existing overhead contact line equipment, and no major refurbishment is required.

Since the measuring device 25 receives the voltage of the trolley wire 1, there is a risk of receiving a noise of the train voltage and outputting an erroneous signal when measuring when the train passes nearby.
In order to prevent this, as shown in FIG. 2, a voltage measuring device 18 for measuring the voltage of the trolley wire 1 is provided, and this voltage measuring device 18 enables measurement when the trolley wire voltage is a certain value or more, Control may be performed so that measurement is not performed when the trolley wire voltage is below a certain value due to passage of a train. The present invention is not limited to the above embodiment.

That is, although the load cells 21, 22, and 23 are used as detectors for measuring the tension of the electric power line in the above-described embodiments, the present invention is not limited to this, and sensors such as potentiometers and strain gauges are used. May be used.

An example in which a potentiometer is used as a tension detecting sensor without changing the existing overhead line structure will be described with reference to FIGS. Reference numeral 40 shown in FIG. 3 is a load detector (load checker), which is connected to the end of the trolley wire 1, for example.

As shown in FIG. 5, the load detector 40 has
A plurality of disc springs 42 are arranged in the casing 41 so as to overlap each other, and the disc springs 42 are arranged by a flange 44 provided at the insertion tip of the pull rod 43 inserted in the casing 41.
It is designed to be pressed. That is, when tension is applied between the connecting eye 45 of the casing 41 and the connecting eye 46 of the pulling rod 43, the flange 44 pushes the disc springs 42 ... And the displacement position of the pulling rod 43 is regulated by this reaction force. It The pull rod 43 is provided with a scale 47 colored in red, for example, and a display window 48 is formed in the display cylinder provided at the end of the casing 41. When the tension rod 43 is displaced by tension, the state of the scale 47 visible through the display window 48 changes depending on the position as shown in FIG. Therefore, depending on the appearance of the scale 47, it is possible to visually observe how tension is applied.

In the load detector 40 having such a structure, as shown in FIG. 3, a potentiometer 50 is attached to the casing 41. This potentiometer 50
The detection shaft 51 of is connected to the pull rod 43. Incidentally, 55 is a waterproof cover, which covers the potentiometer 50. Reference numeral 56 represents a waterproof seal of the detection shaft 51, and 57 represents a waterproof connector of the lead wire 58.

In the potentiometer 50, the electric resistance changes due to the expansion and contraction movement of the detection shaft 51 to change the electric signal. Therefore, the tension of the electric power line can be converted into the electric signal and detected.

When the potentiometer 50 is attached to the load detector 40 as described above, not only can the tension of the electric power line be automatically measured as in the case of FIG. 1, but also in the regular inspection. Maintenance personnel load detector 40
By visually observing and observing the state of the scale 47 visible through the display window 48, it is possible to confirm the extension of the train line at the site.

Another example using a potentiometer as the tension detecting sensor will be described with reference to FIG. Figure 6
Then, an example in which a yoke and a potentiometer are combined is shown, and a potentiometer 60 is fixed to a yoke 65 which connects the trolley wire 1 and the auxiliary suspension wire 2 at both ends, and the detection shaft 61 of the potentiometer 60 is connected to the yoke 65. It is brought into contact with the connecting fitting 62 to which the intermediate point is connected.

Therefore, in this case, when the yoke 65 is inclined due to the extension of the trolley wire 1 or the auxiliary suspension wire 2, the potentiometer 60 changes together with the yoke 65, and the extension amount of the detection shaft 61 changes accordingly. The tilt angle of the yoke 65 can be detected as an electrical signal. Since the inclination angle of the yoke 65 can be calculated by the elongation of the trolley wire 1 or the auxiliary suspension wire 2, the trolley wire 1 and the auxiliary suspension wire 2 are used by using the measuring device 25 and the recorder 35 as in the first embodiment. It is possible to measure the tension of the power line.

Although the storage battery 29 is charged by the solar battery 30 in the above embodiment, when the operating time of the amplifier 26 and the electro-optical converter 27 controlled by the timer 28 is short and the power consumption is small, If it is more cost-effective to replace the storage battery 29 than to charge the solar battery 30, the solar battery 30 may be omitted.

[0044]

As described above, according to the present invention, the measuring instrument which outputs the measurement signal on the overhead line side controls only the maximum temperature and the minimum temperature time zone of the day by controlling the timer. As a result, the load on the drive power source is lightened, so that the storage battery can be used as a power source and the consumption of the storage battery can be reduced. And, since the electric line tension is automatically measured and recorded in the time zones of the highest temperature and the lowest temperature of the day, the data required for the maintenance and management of the electric line can be obtained with high accuracy without requiring human intervention. There are advantages such as being able to.

[Brief description of drawings]

FIG. 1 is a side view showing a first embodiment of the present invention and showing a schematic configuration of an apparatus for automatically measuring the tension of a train line.

FIG. 2 is a block diagram showing an electric circuit configuration of the embodiment.

FIG. 3 is a side view showing the second embodiment of the present invention and showing an example of a tension detector using a load detector and a potentiometer.

FIG. 4 is a diagram for explaining an operating condition of a display unit of the load detector in the embodiment.

FIG. 5 is a sectional view showing the structure of the load detector of the embodiment.

FIG. 6 is a side view showing the third embodiment of the present invention and showing an example of a tension detector using a yoke and a potentiometer.

[Explanation of symbols]

1 ... trolley wire, 2 ... auxiliary suspension wire, 3 ... suspension wire, 4, 5 ...
Yoke, 6 ... Support wire, 8 ... Weight type tension adjusting device, 1
6 ... Prop, 21, 22, 23 ... Load cell, 25 ... Measuring instrument, 26 ... Amplifier, 27 ... Electro-optical converter, 28 ... Timer,
29 ... Storage battery, 30 ... Solar cell, 31 ... Optical fiber, 3
5 ... recorder, 36 ... photoelectric converter, 37 ... meter, 38 ...
Pen recorder, 40 ... Load detector, 50, 60 ... Potentiometer, 65 ... Yoke.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazumi Watanabe 1-4-1, Mei Station, Nakamura-ku, Nagoya, Aichi Prefecture Tokai Passenger Railway Co., Ltd. (72) Inventor, Mitaka Ohara, Mei-eki, Nakamura-ku, Nagoya, Aichi Prefecture Chome 1-4 Tokai Passenger Railway Co., Ltd. (72) Inventor Yasuhide Shinoda 1-4-1, Mei Station, Nakamura-ku, Aichi Prefecture Nagoya City Tokai Passenger Railway Co., Ltd. (72) Inventor Keiji Matsumoto Nakamura Nagoya, Aichi Prefecture 1-4 ward name station Tokai Passenger Railway Co., Ltd. (72) Inventor Seiki Yoshida 3-5 Chofugaoka, Chofu-shi, Tokyo 1 Kyowa Denki Co., Ltd. (72) Inventor, Yuka Wakabayashi Aichi Prefecture 1, 2203 Noritake, Nakamura-ku, Nagoya-shi Electric company Nagoya branch

Claims (1)

[Claims] 1. An overhead wire support part for supporting an electric line, a tension detector for measuring an electric force of the electric line to generate an electric signal, and an above-ground tension part which is insulated from the ground and installed on the overhead wire support part. A measuring device that converts the electrical signal output from the optical signal into an optical signal and outputs the electric signal, a storage battery that is installed in the overhead wire support part and supplies operating power to the measuring device, and an optical signal converted by the measuring device. A train line tension measuring device comprising an optical fiber for sending and a recorder installed on the ground for converting a signal sent through the optical fiber into an electric signal and recording the electric signal. A train line tension measuring device, characterized in that a power supply circuit is provided with a timer for supplying electric power from the storage battery to the measuring instrument for a predetermined time and operating the measuring instrument only during the power supply time.