JPH09240326A - Trolley line with wearing sensing function and method for sensing wearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To apply a wearing sensing function without performing any special machining to a main body of a trolley line. SOLUTION: A lower half segment of a main body 5 of a trolley line 1a is formed into a large arcuate surface 2. Grooves 3a, 3b are formed longitudinally at both ends of the large arcuate surface 2 in a longitudinal direction of the main body of the trolley line 5. The upper part of the main body 5 of the trolley line is formed with a small arcuate surface 4 in such a way that it may be connected to the grooves 3a, 3b. Insulating members 17, 17 are closely contacted with and fixed to both upper portions of the large arcuate surface 3, and each of the conductor members 8, 18 is closely contacted to and fixed to the opposite side surface of the large arcuate surface 2 of each of the insulating members 7, 17. As a wearing is promoted at the large arcuate surface 2 and reaches a wear limiting position 6, the conductor member 8 is made conductive with the conductor member 18 through a pantgraph. With such an arrangement as above, it is detected that a sliding surface reaches the wear limit position 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trolley wire with a wear detecting function used for supplying electric power to an overhead line train and a wear detecting method.

[0002]

2. Description of the Related Art A trolley wire slides on a pantograph when a train passes, and is worn by repeating this sliding. As the wear progresses, the strength of the trolley wire may decrease and the wire may be broken. The disconnection of the trolley wire not only hinders the operation of the train, but also damages various devices installed on the train or the track. Therefore, in consideration of a certain safety factor, the wear amount that can guarantee the strength of the trolley wire (hereinafter, this wear amount is referred to as wear limit) is determined,
The amount of wear is constantly monitored and the trolley wire is replaced before the wear limit is reached.

Conventionally, the amount of wear of the trolley wire has been manually measured by a micrometer or the like. However, since it is necessary to measure the amount of wear at night when trains do not pass, measuring the amount of wear is a laborious task, and the height at which the trolley wire is installed is as high as approximately 5 meters. It was also dangerous work. For these reasons, it is becoming increasingly difficult to secure the labor force necessary for measuring the amount of wear. Further, the wear amount of the trolley wire tends to increase due to the recent increase in the number of passing trains and the passing speed. Therefore, a trolley wire wear detection device that does not require manual labor has been desired.

For the above reasons, vigorous research and development have been conducted on systems for detecting wear of trolley wires. For example, at the position of the wear limit of the trolley wire or on the sliding surface side from this wear limit, an insulating coated electric wire is arranged along the trolley wire as a detection wire, and the insulating film of this detection wire is broken by wear and is conducted to the pantograph. There is proposed a method of detecting wear by detecting such a thing (Japanese Patent Application Laid-Open No. HEI 2)
-70539 gazette).

FIG. 6 is a sectional view showing a conventional trolley wire with a wear detecting function. As shown in FIG. 6, a large arc surface 2 is formed in the lower half of the main body 5 of the trolley wire 11, and the large arc surface 2 has a semicircular cross section. Two grooves 3a and 3b are formed at both ends of the large arc surface 2 in the longitudinal direction of the main body of the trolley wire 5. The groove portions 3a and 3b are portions that are gripped by a mounting jig during installation, and the trolley wire 1a is held in the installed state by the mounting jig. A detection wire groove 12 is formed in the longitudinal direction of the trolley wire main body 5 between the large arc surface 2 and the groove portion 3a and between the large arc surface 2 and the groove portion 3b. Insulation-coated electric wire 13 for wear detection is arranged at. The insulation-coated electric wire 13 is the conductor 1
4 is covered with an insulating layer 15 and formed. The insulating layer 15 prevents the current of the trolley wire body 5 from flowing into the conductor 14. Further, a small arc surface 4 is formed on the trolley wire main body 5 so as to be connected to the groove portions 3a and 3b.

In the trolley wire with a wear detecting function configured as described above, when the trolley wire 11 is not worn, the insulation-coated wire 13 is protected by the insulating layer 15, so that the current of the trolley wire 11 is reduced. Does not flow through the pantograph. When the wear progresses and reaches the wear limit position 6, the insulation-coated electric wire 13 slides on the pantograph and the insulation layer 15 is broken. Therefore, the trolley wire main body 5 is electrically connected to the conductor 14 in the insulation-coated electric wire 13 via the pantograph. By detecting the current flowing through the conductor 14, it is detected that the wear of the trolley wire 11 has reached the wear limit.

Further, an optical fiber is arranged in the detection wire groove 12 of the trolley wire 11 in place of the insulating coated electric wire shown in FIG.
A method of detecting wear by monitoring light transmitted through an optical fiber has been proposed (Japanese Patent Publication No. 2-384).
No. 10). In this method, when abrasion progresses and the optical fiber in the trolley wire is broken, it is detected that light is not transmitted and the abrasion reaches the abrasion limit.

[0008]

However, the above-mentioned prior art has the following problems. That is, the trolley wire main body 5 is formed of copper or a copper alloy, aluminum or an aluminum alloy, or a composite thereof, and in order to form the detection wire groove 12 in the trolley wire main body 5, a special process is performed. There is a problem that it is necessary.

Usually, the trolley wire body 5 is formed by wire drawing (pulling) or rolling (rolling), and the detection wire groove 12 is formed by using a special die during the wire drawing. Or, it is formed by using a special roll during rolling. Since such dies and rolls are formed with special projections for groove processing, there is a problem that these projections are easily damaged during processing.

Further, since the detection wire groove 12 is formed in the trolley wire main body 5, the composition flow of the material during wire drawing or rolling becomes extremely complicated, and defects are likely to occur in the metallographic structure of the trolley wire main body 5. There is a drawback.

Further, since the detection wire groove 12 is formed, there is a drawback that the manufacturing process is complicated and the manufacturing cost is increased as compared with the normal manufacturing process of the trolley wire.

The present invention has been made in view of the above problems, and provides a trolley wire with a wear detecting function and a wear detecting method to which a wear detecting function is added without performing special processing on the trolley wire body. The purpose is to do.

[0013]

A first trolley wire with a wear detecting function according to the present invention is a trolley wire main body, and a trolley wire which is arranged on both sides of the trolley wire main body via insulating members. A trolley wire with a wear detecting function, comprising a conductor member extending in a longitudinal direction of a main body, wherein a lower end of the conductor member is at a wear limit position.

A second trolley wire with a wear detecting function according to the present invention is provided with a trolley wire body and circumferential surfaces on both sides of the trolley wire body via insulating members and extends in the longitudinal direction of the trolley wire body. A trolley wire with a wear detecting function having a conductor member, wherein the upper end of the conductor member is at a wear limit position.

In the first wear detecting method according to the present invention, a conductor member extending in the longitudinal direction of the trolley wire body is provided with an insulating member on the peripheral surfaces on both sides of the trolley wire body so that the lower end thereof is at the wear limit position. And the wear limit is detected by detecting that the pair of conductor members are electrically connected to each other via a pantograph.

According to a second method of detecting wear of the present invention, a conductor member extending in the longitudinal direction of the trolley wire main body is provided with an insulating member on the peripheral surfaces on both sides of the trolley wire main body so that the upper end thereof is at the wear limit position. It is characterized in that the two conductor members are connected in a closed loop, and the wear limit is detected by detecting that the current stops flowing by energizing in the closed loop.

In the trolley wire with a wear detecting function according to the first aspect, the conductor members are arranged on the peripheral surfaces on both sides of the trolley wire body via the insulating member so that the lower end of the conductor member is at the wear limit position. Has been done. Further, in the trolley wire with a wear detecting function according to claim 2, the conductor member is arranged on both side peripheral surfaces of the trolley wire body via the insulating member so that the upper end of the conductor member is at the wear limit position. ing. In any trolley wire with wear detection function, since the insulating member and the conductor member are not arranged in the trolley wire body, the trolley wire body is subjected to processing such as grooving at the time of manufacturing the trolley wire, and the resulting grooves, etc. It is not necessary to dispose an insulating member and a conductor member in. This simplifies the manufacturing process of the trolley wire. Further, since the trolley wire body is not processed with grooves or the like, the life of tools such as dies or rolling rolls required for manufacturing the trolley wire is extended, and a complicated composition flow occurs in the trolley wire during manufacturing. As a result, no defect occurs in the metallographic structure of the trolley wire.

In the wear detecting method according to claim 3,
The wear of the trolley wire with a wear detecting function according to claim 1 is detected. As the wear of the trolley wire progresses, the sliding surface between the trolley wire and the pantograph moves upward, and the sliding surface reaches the wear limit of the trolley wire. Then, since the conductor member and the pantograph come into contact with each other, the pair of conductor members are electrically connected to each other via the pantograph. By detecting this conduction, it can be detected that the wear reaches the wear limit.

In the wear detecting method according to claim 4,
An attempt is made to connect the conductor members of the trolley wire with a wear detecting function according to claim 2 in a closed loop and pass an electric current in the closed loop. Then, when a current flows, it can be seen that there is no breakage such as disconnection in the closed loop, and the wear does not reach the wear limit. On the other hand, when no current flows, the conductor member in the closed loop is broken, and it is detected that the wear reaches the wear limit.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described.
This will be specifically described with reference to the accompanying drawings. FIG. 1 is a sectional view showing a trolley wire with a wear detecting function according to a first embodiment of the present invention. In FIG. 1, the same parts as those in FIG. 6 are designated by the same reference numerals, and detailed description thereof will be omitted. As shown in FIG. 1, insulating members 7 and 17 are closely fixed to both upper sides of the large arc surface 2 so that the lower ends of the insulating members 7 and 17 are at the wear limit position 6, respectively. It is arranged. The insulating members 7 and 17 extend in the longitudinal direction of the trolley wire body 5. The specific resistance of these insulating members 7 and 17 is 10 ¹⁰ Ωc in order to insulate a conductor member described later from the high voltage trolley wire main body 5.
It is preferably m or more. The conductor member 8 is closely fixed to the surface of the insulating member 7 opposite to the large arc surface 2, and the conductor member 18 is closely fixed to the surface of the insulating member 17 opposite to the large arc surface 2. . As a result, the conductor member 8,
18 is fixed to the wear limit position of the trolley wire body 5 while being insulated from the trolley wire body 5. The conductor members 8 and 18 have a length corresponding to the section to be inspected and extend in the longitudinal direction of the trolley wire main body 5. However, the electric resistance of the conductor members 8 and 18 is preferably as small as possible. Resistivity is 10 ^-4
It is preferably Ωcm or less. The lower end of the insulating member 7 and the lower end of the conductor member 8 are at the same position in the vertical direction,
Similarly, the lower end of the insulating member 17 and the lower end of the conductor member 18 are at the same position in the vertical direction. That is, the conductor members 8 and 18
Is arranged so that the lower limit of the wear limit position 6 is reached.

In the trolley wire 1a thus constructed, the pantograph repeatedly slides on the trolley wire 1a.
Then, the large arc surface 2 is worn and scraped off. When the large arc surface 2 further wears and the sliding surface reaches the wear limit position 6, the pantograph contacts the conductor members 8 and 18,
The conductor member 8 and the conductor member 18 are electrically connected via the pantograph. By detecting the current flowing through the conductor members 8 and 18, it can be detected that the sliding surface of the trolley wire 1a has reached the wear limit.

Further, the conductor members 8 and 18 are attached to the trolley wire main body 5
Since the trolley wire 1a is not required to be disposed inside, it is not necessary to perform processing such as groove processing on the trolley wire main body 5 at the time of manufacturing the trolley wire 1a and dispose the conductor members 8 and 18 in the obtained grooves and the like. As a result, there is an effect that the manufacturing process of the trolley wire 1a is simplified. Further, since the trolley wire main body 5 is not processed with grooves or the like, the life of tools such as dies or rolling rolls required for manufacturing the trolley wire 1a is extended, and the trolley wire 1a has a complicated composition flow during manufacturing. Will never occur, so
No defects occur in the metallographic structure of the trolley wire 1a.

FIG. 2 is a sectional view showing a trolley wire with a wear detecting function according to a second embodiment of the present invention. In FIG. 2, FIG.
The same components as those described above are denoted by the same reference numerals, and detailed description thereof will be omitted. As shown in FIG. 2, similarly to the first embodiment, the insulating member 7 and the insulating member 17 are closely fixed to both upper sides of the large arc surface 2 of the trolley wire main body 5, respectively. However, unlike the first embodiment, the upper ends of the insulating members 7 and 17 are arranged at the wear limit position 6, respectively. Similar to the first embodiment, the conductor member 8 is closely fixed to the surface of the insulating member 7 opposite to the large arc surface 2, and the conductor is provided on the surface of the insulating member 17 opposite to the large arc surface 2. The member 18 is closely fixed. However, since the position of each insulating member is different from that of the first embodiment, the upper ends of the conductor members 8 and 18 are at the same position as the wear limit position 6.

In the trolley wire 1b thus constructed, when the pantograph slides repeatedly on the trolley wire 1b, the large arc surface 2 is worn and scraped off as in the first embodiment. When the sliding surface between the trolley wire 1b and the pantograph reaches the wear limit position 6, the conductor member 8 or the conductor member 1
Any of the 8 breaks. Therefore, the conductor members 8 and 18
If the power is applied to, the current will not flow due to the disconnection. As a result, it is detected that the sliding surface of the trolley wire 1b has reached the wear limit.

Although the trolley wire body 5 of each of the above-described embodiments includes copper or copper alloy wire and copper-coated steel wire, the trolley wire body 5 is not limited to this.

Next, a method of detecting wear in the trolley wire with a wear detecting function shown in FIG. 2 will be specifically described with reference to the accompanying drawings. FIG. 3 is a schematic view showing a wear detector in the method according to the embodiment of the present invention. The trolley wire is the trolley wire 1b shown in FIG. As shown in FIG. 3, one end 18 a of the conductor member 18 and one end 8 a of the conductor member 8 are electrically connected by a conductor wire 23. The other end 18b of the conductor member 18 is connected to a power source 21 via a conductor 24. Power supply 21
Is connected to the ammeter 22 in series, and the ammeter 22 is connected to the other end 8b of the conductor member 8 via the conductor 25. When an electric current is supplied from the power source 21, the electric current is supplied to the conductor wire 24 and the other end 18 of the conductor member 18 as indicated by an arrow in the figure.
b, one end 18a of the conductor member 18, the conductor wire 23, the conductor member 8
A closed loop that returns to the power source 21 via one end 8a of the conductor 8, the other end 8b of the conductor member 8, the conductor 25, and the ammeter 22. By measuring this current with the ammeter 22, it is possible to confirm that the conductor member 18 and the conductor member 8 are not broken and the wear does not reach the wear limit.

The operation of the wear detector thus configured will be described. Wear detection is performed at night when trains are not operating. After the power supply to the trolley wire 1b is stopped, power is supplied from the power supply 21 as indicated by the arrow in the figure. Then, when the current is detected by the ammeter 22, it is found that neither the conductor member 18 nor the conductor member 8 is broken, and the wear does not reach the wear limit. As shown in FIG. 4, when wear progresses and the sliding surface reaches the wear limit position 6, for example, the fracture portion 10 is formed in the conductor member 18. When such a broken portion 10 is formed, no current flows and the value of the ammeter 22 becomes zero. As a result, it is detected that the wear has progressed and the sliding surface has reached the wear limit position 6.

[0028]

EXAMPLE Next, the result of actually detecting wear of the trolley wire by the wear detecting method shown in FIG. 3 using the trolley wire 1b shown in FIG. 2 will be described. FIG. 5 is a schematic diagram showing a wear tester. 5, the same parts as those in FIGS. 2 and 3 are designated by the same reference numerals, and detailed description thereof will be omitted. As shown in FIG. 5, a pantograph 35 is arranged above the moving member 37, and a sliding plate 36 made of a copper-based sintered alloy is installed above the pantograph 35. The trolley wire 1b is horizontally arranged above the sliding plate 36, and the sliding surface of the trolley wire 1b is in contact with the sliding plate 36. The conductor members 8 and 18 of the trolley wire 1b shown in FIG. 2 are formed of copper foil,
The insulating members 7 and 17 are formed of a tape-shaped polymer film. That is, the trolley wire 1b is obtained by bonding a copper foil to a polymer film and then sticking this film to the trolley wire main body 5. Conductor members 8 and 1 shown in FIG.
This pasting position was set so that the distance between the upper end of 8 and the uppermost part of the small arc surface 4 was 12 mm. That is, the distance h between the wear limit position 6 and the uppermost portion of the small arc surface 4 was set to 12 mm. Further, in order to shorten the test time, the trolley wire 1b is preliminarily scraped off by 2.5 mm from the sliding surface side.

By moving the above-mentioned moving member 37 reciprocally in the longitudinal direction of the trolley wire 1b by an appropriate driving device, the sliding plate 36 reciprocates while sliding on the trolley wire 1b. The pressing force of the sliding plate 36 against the trolley wire 1b during this reciprocating movement is 80N. The contact plate 36 is connected to the power supply 32 for power supply via the conductor 31, and the conductor 31 is grounded on the way to the power supply 32 for power supply. The power supply 31 is a current control resistor 33.
And the lead wire 34 via the lead wire 34.
As a result, electric power is supplied from the power supply power supply 32 to the trolley wire 1b, and current returns to the power supply power supply 31 via the trolley wire 1b and the sliding plate 36, forming a closed loop.

In the abrasion tester thus constructed, the contact plate 36 is pressed against the sliding surface of the trolley wire 1b with a force of 80 N, and the direct current from the power supply 32 for power supply is applied between the contact plate 36 and the trolley wire 1b. Power was supplied. DC power voltage is 2
00V, current is 200A. While supplying such electric power, the moving member 37 was reciprocally moved so that the sliding speed was 30 km / hour, and the contact plate 36 was slid on the trolley wire 1b to wear the trolley wire 1b. Every 10 hours, power supply from the power supply 31 for supplying power to the trolley wire 1b is stopped, current is passed from the power supply 21 to the conductor members 8 and 18 shown in FIG. 2, and it is confirmed whether or not the ammeter 22 detects the current. did. After the lapse of 80 hours, the ammeter 22 no longer detected the current. Therefore, as a result of inspecting the wear state of the trolley wire 1b, the break 10 shown in FIG. 4 was formed at one place of the trolley wire 1b. In this case, the distance between the sliding surface and the uppermost portion of the small arc surface 4 is 11.9 mm, which is approximately equal to the distance h (12 mm) between the wear limit position 6 and the uppermost portion of the small arc surface 4. became.

As described above, it was possible to detect with high accuracy that the wear reached the wear limit.

[0032]

As described above, in the trolley wire with a wear detecting function according to claims 1 and 2, since the conductor member is arranged outside the trolley wire body, the conductor member is attached at the time of manufacturing the trolley wire. The effect is that there is no need to process the trolley wire body. Further, since the trolley wire main body is not processed, it is possible to prevent a decrease in conductivity of the trolley wire due to the processing.

According to the trolley wire wear detecting method of the third aspect, since the lower end of the conductor member is at the wear limit position, it is detected that the pair of conductor members are electrically connected to each other via the pantograph. As a result, it is possible to detect that the wear reaches the wear limit.

Further, according to the trolley wire wear detecting method of the fourth aspect, since the upper end of the conductor member is at the wear limit position, the two conductor members are connected in a closed loop. By detecting that the current no longer flows, it is possible to detect that the wear reaches the wear limit.

[Brief description of drawings]

FIG. 1 is a sectional view showing a trolley wire with a wear detecting function according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a trolley wire with a wear detecting function according to a second embodiment of the present invention.

FIG. 3 is a schematic diagram showing a wear detector according to an embodiment method of the present invention.

FIG. 4 is a schematic diagram showing a state of wear.

FIG. 5 is a schematic view showing an abrasion tester.

FIG. 6 is a sectional view showing a conventional trolley wire with a wear detecting function.

[Explanation of symbols]

 1a, 1b, 11; trolley wire 2; large arc surface 3a, 3b; groove portion 4; small arc surface 5; trolley wire body 6; wear limit position 7, 17, 71, 72; insulating member 8, 18; conductor member 8a , 18a; one end 8b, 18b; the other end 10; breakage portion 12; detection wire groove 13; insulation-coated electric wire 14; conductor 15; insulating layer 21; power supply 22; ammeter 23, 24, 25, 31, 34; conductor wire 32; power supply for power supply 33; resistance 35; pantograph 36; sliding plate 37; moving members 71a, 72a; projecting portion

Claims (4)

[Claims] 1. A trolley wire with a wear detecting function, comprising: a trolley wire main body; and conductor members which are arranged on both sides of the trolley wire main body via insulating members and extend in the longitudinal direction of the trolley wire main body. The trolley wire with a wear detecting function, wherein the lower end of the conductor member is at the wear limit position. 2. A trolley wire with a wear detecting function, comprising: a trolley wire main body; and conductor members which are arranged on both sides of the trolley wire main body via insulating members and extend in the longitudinal direction of the trolley wire main body. A trolley wire with a wear detecting function, wherein the upper end of the conductor member is at a wear limit position. 3. A conductor member extending in the longitudinal direction of the trolley wire main body is arranged on both side peripheral surfaces of the trolley wire main body via insulating members so that the lower end thereof is at a wear limit position. A wear detecting method, comprising detecting that the conductor members are electrically connected to each other via a pantograph to detect a wear limit. 4. A conductor member extending in the longitudinal direction of the trolley wire main body is arranged on both side peripheral surfaces of the trolley wire main body via insulating members so that the upper end thereof is at a wear limit position, and the two conductor members are provided. A wear detecting method characterized in that a conductor member is connected in a closed loop, and the wear limit is detected by detecting that electric current has stopped flowing in the closed loop.