JP3162417B2 - Overhead line traveling machine wheels - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overhead line inspection apparatus which travels on an overhead line for the purpose of flaw detection of the overhead line, and a wheel of a spacecraft used for maintenance or the like of the overhead line.

[0002]

2. Description of the Related Art For example, overhead transmission lines such as ACSRs are often laid through mountainous areas, and lightning damage is frequent. The degree of the damage varies from a slight degree to a degree that cannot be neglected such that a part of the wire is broken or the like. Disconnection of the wire constituting the overhead wire may cause corona discharge, may lower the tensile strength of the overhead wire, and may cause a major accident such as breakage. So, conventionally,
Inspection devices have been developed that automatically detect flaws on overhead wires over their entire length (Japanese Patent Application Laid-Open Nos. 64-73248 and 63-234149).

[0003] On the other hand, various obstacles that hinder the traveling of this type of inspection apparatus are mounted on the overhead line. As an example, a snow-resistant ring and a damper are given. FIG.
It is a perspective view of a hard-to-wear ring. As shown in the figure, the snow-resistant ring 1 is mounted on an overhead wire by fitting its protrusion 1a into the recess 1b. FIG. 8A is a side view of the overhead wire after the snow-resistant ring is attached. As described above, the outer diameter of the overhead wire 2 is increased by the thickness of the snow-resistant ring 1 and hinders smooth running of the inspection device.

FIG. 9 is a side view of a damper. Also,
FIG. 10 is a cross-sectional view of the overhead wire after mounting the damper.
The damper is integrated such that two weights 3 extending to the left and right are supported by a central clamp portion 4 and suspended from the overhead wire 2. An armor rod 5 is provided in the vicinity of the clamp part 4 to protect the overhead wire. As shown in FIG. 10, the clamp portion 4 is configured to be openable and closable at a hinge 4 a, and is fitted and fixed to the overhead wire 2 via an armor rod 5.

[0005] In this case as well, the outer diameter of the overhead wire increases, which hinders smooth running of the inspection apparatus. However, the above-described inspection apparatus records a flaw detection result or transmits it to the outside while traveling on an overhead line. Therefore, the running stability of the device is an important factor. That is, the configuration of the wheels and the like must be selected so as to prevent the wheels from falling off or falling during traveling and to obtain the frictional force required for traveling. For this reason, conventionally, FIG.
As shown in (b), a wheel having a V-shaped groove formed on the outer periphery of the wheel 6 or a wheel having a U-shaped groove formed by a two-dot chain line in the drawing has been used. Wheel 6 and overhead wire 2
In order to prevent slippage between the wheels, the peripheral surface of the groove of the wheel 6 is coated with rubber or the like.

[0006]

By the way, if the overhead wire 2 and the wheel 6 are electrically insulated by rubber coating or the like as shown in FIG. Because it cannot be grounded,
The potential of the inspection device increases due to the guidance of the adjacent overhead line. This type of inspection apparatus usually has a complicated electronic circuit mounted thereon, and if the potential of the apparatus itself increases, these electronic circuits are adversely affected, resulting in failure or the like. As a countermeasure, the rubber coated on the wheel 6 may be made of conductive rubber, or a mechanism for electrically contacting the entire device with the overhead wire 2 at another part of the device may be provided to secure the ground line. ing.

FIG. 11 shows a side view of such a contact mechanism. As shown in the figure, a leaf spring 7 is attached to a part of the apparatus main body 10 so that the leaf spring 7 always comes into contact with the upper surface of the overhead wire 2. In addition, as shown in FIG.
The slide shaft 10a is attached to the
A conductive roller 9 is attached to the lower end of the slide shaft 10a via a leaf spring 8 while the spring 10b is sandwiched so as to push down 0a. The conductive roller 9 is used for the overhead wire 2
The apparatus body 10 is always pressed with an appropriate pressure by the force of the spring 10 b, whereby the apparatus main body 10 is electrically connected to the overhead wire 2.

[0008] However, such an apparatus as described above is also used in FIG.
As shown in FIGS. 1 and 12, when the snow-resistant ring 1 is attached to the overhead line 2, it is difficult to always electrically contact the overhead line 2. Further, as described above with reference to FIG. 8, the wheel 6 coated with the conductive rubber has a problem that the electric resistance is increased. The present invention has been made in view of the above points, and it is an object of the present invention to provide a wheel of an overhead line traveling machine capable of maintaining good electrical contact between an apparatus body and an overhead line. is there.

[0009]

SUMMARY OF THE INVENTION The present invention provides a method for rolling over an overhead line.
Overhead traveling with a wheel body composed of moving conductive members
Contact with the overhead wire when the wheel body rolls
Non-slip coating made of insulating material provided on the contact surface
And the contact portion is formed by partially removing the coating portion.
And a large number of exposed portions arranged in a staggered
The width of the exposed portion along the contact peripheral surface is
Larger than the distance between adjacent exposed parts of each row
It is characterized by being set.

[0010]

[Function] This wheel is in contact with the overhead wire of the wheel body.
The exposed part is covered with rubber or other non-slip coating on the peripheral surface.
Are arranged in a zigzag pattern in two rows along the contact surface, and
The width dimension along the contact surface of the
By setting it larger than the interval between the parts, the wheel body
Makes electrical contact with the overhead wire during rolling. This allows the car
Wheels can be prevented from slipping, and the device body can be continuously connected to the overhead line.
Can be connected electrically .

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. FIG. 1 is a front view showing an embodiment in which the wheel of the present invention is applied to an overhead wire inspection apparatus, and FIG. 2 is a side view thereof. FIG.
The overhead wire inspection device 10 shown in FIG.
0 is supported on the overhead wire 2, and wheels 20, 20 that roll around the overhead wire 2 are provided on the front and rear. On this wheel 20,
A deep groove 21 is formed at the center, and a shallow groove 22 is formed around the deep groove 21. Note that the distance between the wheels 20, 20 is
It is preferable that the length is set to be larger than the length of the obstacle so that both of them do not roll on the obstacle simultaneously.

The apparatus main body 10 includes a frame 11, a coil mounting frame 12 provided on the upper part of the frame, a control circuit box 13 suspended on the lower part, and a frame on the open side of the frame 11 (left side in FIG. 1). And a fall-prevention wire 14 that binds the upper and lower sides. A drive motor 17 for driving the wheels 20 via a chain 16a is mounted on the front surface of the frame 11. Further, an obstacle sensor 15 for detecting an obstacle such as a damper attached to the overhead wire 2 is provided at the center of the frame 11. When the obstacle sensor 15 detects an obstacle, the obstacle sensor 15 sends a detection signal to a control circuit in the control circuit box 13 to open and retract the coil mounting frame 12 having a left-right split structure to the left and right. .

Incidentally, as shown in FIG.
0 are simultaneously driven via a chain 16b. A mirror 18 is attached so as to cover the overhead line 2 from above, and a camera 18b supported and fixed below the overhead line 2 photographs the overhead line 2 and the back of the overhead line 2 projected on the mirror 18. It is configured to be. During the traveling, the number of rotations of the wheel 20 is counted by the control circuit in the control circuit box 13, and if a flaw in the overhead wire or breakage of the wire is detected by the flaw detection coil in the coil mounting frame 12, the speed of the overhead wire is detected. The location of the flaw is calculated based on the number of rotations of the wheel, the result is recorded, and the camera 18b is used to take an image of the damage state and the broken wire.

Here, a partially cut-away side view of the wheels of the apparatus of the present invention is shown in the broken line frame of FIG. 1 and in FIG. 3, and the details of the configuration of the wheels 20 will be described. As shown in the figure, the wheel main body 31 of the wheel 20 is made of a conductive member such as iron, copper, or brass. The outer peripheral surface is covered with a non-slip processing portion 32 made of an insulator such as rubber. In the case of this wheel, a rectangular window-shaped notch is provided in the vicinity of the center so that electrical contact with the overhead wire 2 can be maintained regardless of whether the overhead wire 2 is thin or thick. This notch is provided in large numbers along the periphery of the wheel 20. This notch is called an exposed portion 33. The exposed portion 33 is formed so as to be alternately shifted in the circumferential direction on the left side and the right side when viewed from the center of the wheel. Therefore, even when the wheel 20 travels on the overhead line 2, the right or left exposed portion 3
3 always contacts the overhead wire 2 and the wheel body 31 and the overhead wire 2
It is configured so that electrical contact between them can be maintained. The wheel main body 31 is supported by a bearing (not shown).
It is electrically connected to the apparatus main body 10. Thus, the device is always electrically connected to the overhead line 2 via the wheels 20. Further, as shown in FIG. 3, when the width d1 of the exposed portion 33 is set to be larger than the interval d2 of the exposed portion 33, each exposed portion 33 more reliably makes electrical contact with the overhead wire during rotation of the wheel.

As shown in FIG. 2, a pair of wheels 20 are provided at the front and rear of the apparatus. For example, one of the wheels 20 is electrically separated from the overhead line 2 beyond the above-described snow-resistant ring. Even in this case, if the other wheel 20 is in contact with the overhead wire 2, the electrical connection between the apparatus body 10 and the overhead wire 2 can always be maintained. In order to prevent a slip between the wheel 20 and the overhead wire 2, if necessary, the area of the exposed portion 33 and the non-slip processing portion 32 sandwiched between the exposed portions 33 are provided.
It is preferable to select the width of.

The wheel according to the present invention has the following structure so that it can run stably on a thick overhead wire or a thin overhead wire, and can stably ride over the above-described damper or the like. Is added. As shown, wheels 2
0 has a substantially V-shaped deep groove 21 formed on the outer periphery of a central portion thereof. The entire wheel has a configuration in which a substantially U-shaped shallow groove 22 is formed. V of this deep groove 21
The angle α between the characters is optimally about 90 degrees. In the case of a shallow groove, the side close to the deep groove 21 is selected to have a slope β of about 15 degrees with respect to the horizontal plane, and the part far from the deep groove 21 is selected to have a slope γ of about 45 degrees with respect to the horizontal plane. ing. A shaft hole 23 is provided in the center of the wheel, and a keyway 23a is formed here. In addition, this wheel 20
Is coated with a non-slip treatment portion 32 made of, for example, urethane rubber having a hardness of about 90 degrees. Specifically, the outside diameter of the overhead wire through which this device travels is 10 mm to 3 mm.
In the case of about 0 mm, the minimum width W of the deep groove 21 is
1 is 8mm, maximum width W2 is 20mm, and total wheel width W3 is 100
mm. Also, the maximum outer diameter D1 of the wheel is
200 mm, the maximum outer diameter D2 of the shallow groove portion was 164 mm, the maximum outer diameter D3 of the deep groove was 134 mm, and the minimum outer diameter D4 of the deep groove was 110 mm.

The apparatus of the present invention having the above configuration operates as shown in FIGS. 4 to 6 when traveling on an overhead line. That is, first, as shown in FIG. 4, when traveling on the overhead line 2, the overhead line 2 fits into the deep groove 21 of the wheel 20, and the wheel 2
The rolling of 0 causes the device 10 to run on the overhead line 2 stably. In this case, the device 10 does not swing right and left due to the action of the deep groove 21. In addition, good contact between the overhead wire 2 and the inner surface of the deep groove 21 is maintained, and slip does not easily occur.

V-shaped sandwiching angle α of this deep groove 21 (FIG. 3)
Is selected so that the overhead wire 2 bites into the deep groove 21 due to the weight of the device 10, whereby the overhead wire 2 and the wheels 2
It is preferable to increase the frictional force with zero. Therefore, the setting of the angle is, as shown in the above embodiment,
About 90 degrees is optimal. On the other hand, as shown in FIG. 5, when the snow-resistant ring 1 is crossed, the outer peripheral surface of the snow-resistant ring 1 circumscribes the shallow groove 22 of the wheel 20. As shown in FIG. 6, when the vehicle travels on the clamp 4 such as a damper, the vehicle also travels so that the shallow groove 22 of the wheel 20 comes into contact with the clamp 4.

As a result, in any state, the device 1
0 travels stably, and as can be seen from the figure, the apparatus 10 can easily overcome obstacles having a relatively large diameter. When the wheel 20 rolls on an obstacle,
In order to prevent the outer peripheral surface of the obstacle from getting into the deep groove 21,
Select the maximum width of In this way, the resistance of the wheel 20 that has climbed over the obstacle is reduced when the wheel 20 climbs over the obstacle because the bottom of the U-shaped shallow groove 22 contacts the outer periphery of the obstacle. Even in such a case, one of the wheels 20 provided before and after the device 10 rolls on the overhead wire 2, so that
The running force does not decrease.

The present invention is not limited to the above embodiment. One or more wheels may be provided in the apparatus. In the above-described embodiment, an example in which the wheel of the present invention is applied to an overhead wire inspection device is illustrated. However, the wheel of the present invention may be, for example, a spacecraft or an overhead wire used when performing maintenance and inspection of an overhead wire. Of course, the present invention can be applied to a wire drawing device or the like used for wire drawing.

[0021]

According to the wheels of the overhead line traveling machine of the present invention described above, it is not necessary to provide a special device for maintaining the electrical connection between the device body and the overhead line as provided in the conventional device. The size and weight of the entire device can be reduced. Also, the manufacturing cost can be reduced. In addition, the structure of the wheel itself does not basically change largely, and the anti-slip processing portion is provided on the outer peripheral surface of the wheel sufficiently effectively, so that the device can run stably.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment in which the vehicle structure of the present invention is applied to an overhead line inspection device.

FIG. 2 is a side view of the apparatus of FIG.

FIG. 3 is a longitudinal sectional view of a wheel portion.

FIG. 4 is a longitudinal sectional view of a main part when a wheel gets over an overhead line or an obstacle.

FIG. 5 is a vertical sectional view of a main part when a wheel passes over an overhead line or an obstacle.

FIG. 6 is a longitudinal sectional view of a main part when a wheel gets over an overhead line or an obstacle.

FIG. 7 is a perspective view of a hard-to-wear ring.

FIG. 8A is a side view of an overhead wire to which a snow-resistant ring is attached, and FIG. 8B is a cross-sectional view thereof.

FIG. 9 is a side view of the overhead wire to which a damper is attached.

FIG. 10 is a cross-sectional view of an overhead wire equipped with a damper.

FIG. 11 is a side view of a contact mechanism between an apparatus main body and an overhead wire of a conventional apparatus.

FIG. 12 is a side view of another contact mechanism of the apparatus main body and the overhead wire of the conventional apparatus.

[Explanation of symbols]

 2 Overhead Wire 10 Device Main Body 11 Frame 12 Coil Mounting Frame 13 Control Circuit Box 14 Fall Prevention Wire 15 Obstacle Sensor 16a, 16b Chain 17 Drive Motor 20 Wheel 31 Wheel Main Body 32 Non-Slip Processing Unit 33 Exposed Part

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G01N 27/72-27/90 H02G 1/02

Claims (1)

(57) [Claims] 1. A wheel of an overhead line traveling machine provided with a wheel body made of a conductive member rolling on an overhead line, wherein an insulating material is provided on a contact peripheral surface that comes into contact with the overhead line during the rolling of the wheel body. A non-slip covering portion comprising: a plurality of exposed portions which are formed by partially removing the covering portion and which are arranged in a staggered manner in two rows along the contact peripheral surface; A wheel of the overhead line traveling machine, wherein a width dimension along the contact peripheral surface is set to be larger than a distance between adjacent exposed portions of each row along the contact peripheral surface.