JP2005181188A - Method and apparatus for inspecting degradation of electric wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily inspect the conditions of internal degradation of overhead transmission lines. <P>SOLUTION: X-rays are irradiated on an overhead transmission line 1, from two direction which form a right angle. An X-ray detecting part 3 receives transmitted X-rays which have transmitted through the overhead transmission line, to directly or indirectly acquire two transmission images from the two directions which form a right angle and inspect the conditions of internal degradation, such as breakage of strands and corrosion of the overhead transmission line. The apparatus causes few difficulties in use about its management, environment, etc. In addition, the apparatus is inexpensive and compact and provides satisfactory inspection workability. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electric wire deterioration inspection method and apparatus for inspecting an internal deterioration state of an overhead power transmission line.

  Regarding the maintenance of overhead power transmission lines, it is extremely important to grasp the internal deterioration status of the overhead power transmission lines such as broken wires and internal corrosion. There is an eddy current flaw detection method as an inspection method for inspecting the internal deterioration of overhead power transmission lines by nondestructive inspection. The internal corrosion situation can be inspected by the change of the eddy current, and the corrosion inspection machine by this eddy current flaw detection method has been put into practical use. This makes it possible to investigate the performance of electric wires in the coast and other environments that are easily corroded, or electric wires that have become obsolete after construction, and find places that need to be replaced.

Further, as a method for inspecting an internal deterioration state by nondestructive inspection of an overhead power transmission line, a corrosion diagnosis method of the overhead power transmission line by γ-ray CT has been proposed (see Japanese Patent Application No. 2000-95266).
In this corrosion diagnosis method, a γ-ray source for irradiating γ-rays and a detector for detecting γ-rays are housed in a container having a γ-ray blocking wall, and the container is rotated around an overhead power transmission line while being aerial. The tomography of the overhead power transmission line is performed by detecting the γ-ray transmitted through the power transmission line.
Japanese Patent Application No. 2000-95266

The above-described corrosion diagnosis method for overhead power transmission lines by γ-ray CT has a problem that management of radioactive isotopes, which are γ-ray sources, is not easy, and its use, including environmental problems, is extremely difficult.
Further, since the container containing the γ-ray source and the like is rotated once around the overhead power transmission line, the apparatus size becomes large. Also, workability is not good.
Further, as a measure for preventing unnecessary irradiation of γ-rays, the γ-ray source is moved to the position of the γ-ray transmitting window only at the time of imaging. However, since the imaging is performed by rotating around the electric wire, the angle is 360 °. A window is required, and therefore the irradiation range cannot be limited sufficiently narrowly.
Further, it is necessary to cover the device with a blocking wall, which also increases the size of the device and increases the cost.

  The present invention has been made to eliminate the above-mentioned conventional drawbacks, and has no particular problem with respect to the management and environment of the apparatus. Therefore, the apparatus is inexpensive and compact without any particular difficulty in using the apparatus. Another object of the present invention is to provide a method and an apparatus for inspecting electric wire deterioration with good inspection workability.

The method for inspecting deterioration of an overhead power transmission line according to claim 1 that solves the above-described problem is a method of irradiating X-rays from two directions substantially perpendicular to the overhead power transmission line and receiving transmitted X-rays transmitted through the overhead power transmission line. The detection unit obtains two fluoroscopic images in two perpendicular directions directly or indirectly, and inspects the internal deterioration state of the overhead power transmission line.
In addition, if a perspective image from two right angles can be obtained, it can be identified basically regardless of the internal deterioration at any point in the wire, but it does not have to be strictly two directions at right angles. Therefore, the direction is almost perpendicular.
The internal deterioration state refers to the state of occurrence of corrosion products and the state of internal deterioration such as the breaking or thinning of the wire.

The method for inspecting an overhead power transmission line according to claim 2 is directly or indirectly performed by an X-ray detector that irradiates the overhead power transmission line with X-rays from one direction and receives transmitted X-rays transmitted through the overhead power transmission line. It is characterized by obtaining one perspective image and inspecting the internal deterioration state of the overhead power transmission line.

Claim 3 is an electric wire deterioration inspection apparatus for inspecting the internal deterioration state of an overhead power transmission line by the electric wire deterioration inspection method of claim 1 or 2.
An electric wire gripping bracket for gripping the overhead power transmission line, an X-ray generator mounting portion provided at two orthogonal positions on the lower surface side of the wire gripping bracket within a vertical plane including the cross section of the overhead power transmission line, and the two X-rays One X-ray generator that can be attached to and detached from any of the generator attachment portions is provided, and the wire gripping bracket can attach an X-ray detector on the opposite side of the X-ray generator attachment portion.

Claim 4 is an electric wire deterioration inspection device for inspecting the internal deterioration state of an overhead power transmission line by the electric wire deterioration inspection method of claim 1 or 2,
A frame body equipped with wheels and suspended on the overhead power transmission line so that the wheels can run on the overhead power transmission line, and approximately 90 ° centered on the overhead power transmission line within the vertical plane including the section of the overhead power transmission line. A rotating frame provided rotatably, an X-ray generator attached to the lower surface side of the rotating frame at a position that forms approximately 45 ° with respect to a vertical line, and an overhead transmission line of the X-ray generator And an X-ray detector provided on the opposite side of 180 °.

Claim 5 is an electric wire deterioration inspection device for inspecting the internal deterioration state of an overhead power transmission line by the electric wire deterioration inspection method of claim 1 or 2.
A frame body which is mounted on an overhead power transmission line and suspended on the overhead power transmission line so as to be able to run on the overhead power transmission line, and is attached to both sides of the lower surface side of the frame main body at approximately 45 ° with respect to the vertical line. The X-ray generator and an X-ray detector provided on the opposite side of 180 ° centering on the overhead power transmission line of each X-ray generator are provided.

  According to a method for inspecting an electrical deterioration of an overhead power transmission line according to claim 6, the overhead power transmission line is gripped by an electrical wire gripping bracket that grips the overhead power transmission line, X-ray detection that is integrally provided on the opposite side of 180 ° centered on the power transmission line of the X-ray generation device by irradiating the X-ray from the X-ray generation device attached to one of two orthogonal positions toward the power transmission line The X-ray generator is transferred to the other of the two locations, the X-ray generator is transferred to the other of the two places, and X-rays are irradiated toward the power transmission line from the X-ray generator. A fluoroscopic image is obtained by the X-ray detection unit, and an internal deterioration state of the overhead power transmission line is inspected based on these two fluoroscopic images in two perpendicular directions.

  According to a method for inspecting an electrical deterioration of an overhead power transmission line according to claim 7, a frame body suspended from the overhead power transmission line with wheels mounted on the overhead power transmission line is traveled and stopped at a predetermined position to be inspected. An X-ray generator attached to a position on the lower surface side of a rotating frame provided so as to be able to rotate about 90 ° around the power transmission line in a vertical plane including a section of the overhead power transmission line at a position forming about 45 ° with respect to the vertical line X-rays are radiated from the X-ray generator toward the transmission line to obtain a perspective image of the transmission line by an X-ray detection unit integrally provided on the opposite side of 180 ° around the overhead transmission line of the X-ray generator, After rotating the rotating frame by approximately 90 °, irradiate the X-ray from the X-ray generator toward the power transmission line, and obtain a perspective image of the power transmission line by the X-ray detection unit on the opposite side of 180 °, Based on these two perspective images in approximately two perpendicular directions, It is characterized by inspecting the internal deterioration status of overhead transmission lines.

  According to a method for inspecting deterioration of an overhead power transmission line according to claim 8, the frame main body suspended from the overhead power transmission line with wheels mounted on the overhead power transmission line is traveled and stopped at a predetermined position to be inspected. Irradiate X-rays toward the transmission lines from the two X-ray generators attached to the lower surface side at positions of approximately 45 ° with respect to the vertical lines, and the overhead transmission lines of the respective X-ray generators Two X-ray detectors integrally provided on the opposite sides of the center 180 degrees are used to obtain a perspective image of the transmission line, and based on these two perspective images in two substantially perpendicular directions, the internal deterioration status of the overhead transmission line is determined. It is characterized by inspecting.

  Claim 9 is the electric wire deterioration inspection method according to claim 1, 2, 6, 7 or 8, wherein the fluoroscopic image information detected by the X-ray detector is wirelessly transmitted to the ground as an image signal. Is received by a ground receiving device, and an internal deterioration state is inspected while viewing an image.

  FIG. 10 is the electric wire deterioration inspection method according to the first, second, sixth, seventh, or eighth aspect, wherein the X-ray detection unit can detect the intensity of the transmitted X-ray together with the fluoroscopic image. It is characterized in that the internal deterioration state is simply determined by evaluating the strength of the image, and the internal deterioration state is inspected with a fluoroscopic image at a portion having a high strength evaluation that is determined to require detailed inspection.

According to the wire deterioration inspection method of the present invention, since it is a non-destructive inspection, with respect to the installed overhead transmission line, the degree of thinness of the overhead transmission line, the breaking condition of the strand, and the corrosion product It is possible to inspect the occurrence status.
Since the inspection is based on X-ray irradiation, unlike the inspection method using γ-rays, there is no problem that management of radioisotopes is not easy, and there are almost no environmental problems, and there are no special difficulties in the implementation.
In addition, since the X-ray is only irradiated from two directions at the maximum, the size of the apparatus is compared with that in which the γ-ray generator is rotated around the overhead power transmission line and irradiated over the entire circumference. Can be made compact and the inspection cost is low. In addition, since the irradiation is performed from two directions at the maximum, the inspection work time is remarkably shortened as compared with the case of the entire circumference.
In addition, it is possible to at least identify the internal deterioration location of the electric wire by two fluoroscopic images by X-ray irradiation from two directions at right angles, and in terms of the balance of required inspection accuracy, inspection workability and cost, It is effective and extremely appropriate as a means for inspecting internal deterioration of installed overhead transmission lines.

  According to the electric wire deterioration inspection device of claim 3 or the electric wire deterioration inspection method of claim 6, when the X-ray generator is attached to the X-ray generator attachment portion of the electric wire gripping bracket, the X-ray generator is suspended by its weight. The X-ray generator irradiates the overhead power transmission line directly above the X-ray generator. That is, the X-ray irradiation direction is vertically upward, that is, X-ray irradiation to the sky. Therefore, there is almost no risk of exposure even without a blocking wall. Since no barrier wall is required, the apparatus can be made compact, and the workability can be improved without the problem of difficulty in work due to the presence of the barrier wall. In addition, because of the structure, the direction of the electric wire is the direction of the electrode, so there is an advantage that the leakage dose is small.

According to the electric wire deterioration inspection device of claim 4 or the electric wire deterioration inspection method of claim 7, since there is a wheel on the overhead power transmission line, it is possible to easily inspect an arbitrary position by running on the overhead power transmission line. it can.
Further, since one X-ray generator is configured to rotate by approximately 90 °, it is possible to perform inspection in two directions at right angles with an inexpensive device.

  According to the electric wire deterioration inspection apparatus of the fifth aspect or the electric wire deterioration inspection method of the eighth aspect, similarly to the electric wire deterioration inspection apparatus of the fourth aspect, inspection at an arbitrary position can be easily performed. Also, since the X-ray generator does not have to be moved to the left and right, the inspection work efficiency is good.

  Hereinafter, an electric wire deterioration inspection method embodying the present invention will be described with reference to the drawings.

The overhead power transmission line to be subjected to the wire deterioration inspection method of the present invention is, for example, an ACSR (steel core aluminum twisted wire) -based wire, hard copper twisted wire, OPGW (optical fiber overhead ground wire), GSW (galvanized steel twisted wire). Wire), ACS (aluminum-clad steel stranded wire), etc. As an example, FIG. 2 shows a cross section of a steel core aluminum stranded wire. This steel core aluminum stranded wire (aerial transmission line 1) has a configuration in which a plurality of aluminum wires or aluminum alloy wires 1b are concentrically twisted around a plurality of twisted steel wires 1a.

FIG. 1 schematically illustrates an electric wire deterioration inspection method according to an embodiment of the present invention. (A) is an explanatory view seen from the longitudinal direction of an installed overhead power transmission line 1, and (b) is an overhead power transmission line. It is explanatory drawing seen from the horizontal direction of 1. FIG.
In the electric wire deterioration inspection method of this embodiment, as shown in the figure, the X-ray generator 2 irradiates X-rays from two directions perpendicular to the overhead power transmission line 1 and receives transmitted X-rays transmitted through the overhead power transmission line. The X-ray detection unit 3 directly or indirectly obtains two perspective images in the two right-angled directions, and inspects the internal deterioration state of the overhead power transmission line.
In the illustrated example, a set of an X-ray generator 2 and an X-ray detector 3 that are opposed to each other by 180 ° across the overhead power transmission line 1 is provided, and an angular position of 45 ° on the left side and 45 ° on the right side with respect to the vertical line. Can be taken. The X-ray generator 2 is separated from the overhead power transmission line 1 by, for example, about several tens of centimeters, and the X-ray detector 3 is brought close to the overhead power transmission line 1. The X-ray generator 2 and the X-ray detector 3 constitute a wire deterioration inspection device 4.
When X-rays are irradiated from the X-ray generator 2 to the overhead power transmission line 1 at each position, the X-rays transmitted through the overhead power transmission line 1 irradiate the X-ray detection unit 3. When an X-ray film is used as the X-ray detection unit 3, an image is directly formed on the X-ray film by the X-ray transmitted through the overhead power transmission line 1.
The contents of the internal deterioration to be inspected are the degree of thinning of the wire, the breakage of the wire, the occurrence of corrosion products, etc., but visually check the image on the X-ray film to determine the internal deterioration status can do. In the case of the overcurrent flaw detection method, the internal deterioration state is judged from the position and size of the waveform based on the detected signal, but in the present invention, the internal deterioration state itself can be visually evaluated as an image. Easy to evaluate.

  In the case of a steel core aluminum stranded wire, the inspection target of internal deterioration is mainly aluminum wire (including aluminum alloy wire). Since X-rays attenuate as the density increases when passing through the material, the steel core part attenuates X-rays more than the aluminum wire part. For this reason, the inspection accuracy within the range where the steel core can be shaded is lower than that of the part that simply penetrates aluminum, but since the image is taken from two directions at right angles, at least one of the aluminum wire parts is affected by the steel core. No photography is possible, and the steel core is unlikely to prevent inspection.

An example of the procedure for inspecting each location in the length direction of the overhead power transmission line 1 will be described. FIG. 1 (b) shows the timing of inspection by the wire deterioration inspection device 4, and L is the survey length (aerial) The interval at which the internal deterioration of the transmission line is inspected). In this case, for example, an inspection in the X direction is performed at one place of the overhead power transmission line 1, and an inspection in the Y direction is performed at the next place where the wire deterioration inspection device 4 is moved by half (L / 2) of the investigation length L. The inspection in two perpendicular directions is taken as one inspection. In this way, every time the wire deterioration inspection apparatus 4 is moved by half (L / 2) of the inspection length L, the inspection in the X direction and the inspection in the Y direction are repeated alternately. Thereby, the inspection of the internal deterioration state of an overhead power transmission line can be performed efficiently. That is, in FIG. 1B, one inspection is performed at P1 and P2, one inspection at P3 and P4, and one inspection at P5 and P6.
Of course, inspections in both the X and Y directions may be performed at the same point.
Further, an inspection method in which, for example, a location where corrosion has progressed is estimated in advance and the location is inspected is also possible.

An embodiment (Example 2) of the electric wire deterioration inspection apparatus of the present invention will be described with reference to FIGS. This electric wire deterioration inspection apparatus 11 is orthogonal to the lower surface side of the electric wire gripping fitting 12 within a vertical plane (that is, a plane parallel to the paper) including the electric wire gripping fitting 12 that holds the overhead power transmission line 1 and a cross section of the overhead electric transmission line. Two X-ray generator attachment parts 13a and 13b provided at two places and one X-ray generator 14 that can be attached to and detached from both of the two X-ray generator attachment parts 13a and 13b are provided.
The electric wire gripping metal 12 connects two divided pieces 12b having a semicircular concave groove 12a into which the overhead power transmission line 1 is fitted so as to be openable and closable by a hinge 12c on one end side, and tightens the other end side by a bolt and nut 12d. As shown in the figure, the overhead power transmission line 1 is sandwiched and fastened with bolts and nuts 12d to be fixed to the overhead power transmission line 1. Moreover, the said electric wire holding | grip metal fitting 12 can attach the X-ray film 15 which is an X-ray detection part to the opposite side of two X-ray generator attachment parts 13a and 13b, respectively.

FIG. 3 (a) shows a state before the X-ray generator 14 is mounted. The electric wire gripping fitting 12 is in a horizontal posture, and the overhead power transmission line 1 is not twisted. When the X-ray generator 14 is attached to one X-ray generator attachment portion 13a, the X-ray generator 14 twists the overhead power transmission line 1 in the clockwise direction with its weight as shown in FIG. The X-ray generator 14 can irradiate the overhead power transmission line 1 directly above with X-rays. The X-ray film 15 is attached to the wire gripping fitting 12 so as to be positioned horizontally immediately above the overhead power transmission line 1. As a result, when the overhead power transmission line 1 is irradiated with X-rays from the X-ray generator 11, the X-ray film 15 is exposed to the transmitted X-rays, and a fluoroscopic image showing the internal deterioration state is obtained.
Further, when the X-ray generator 11 is attached to the other X-ray generator attachment portion 13b, as shown in FIG. 3C, the X-ray generator 14 causes the overhead power transmission line 1 to be placed on the opposite side by its weight. Similarly, the X-ray generator 14 can irradiate the overhead transmission line 1 directly above with X-rays.
As described above, in both cases of two right angles, the X-ray irradiation direction is vertically upward, that is, X-ray irradiation to the sky. Even if X-rays are irradiated toward the sky, there is no fear of irradiating a person. Therefore, a blocking wall for preventing exposure is unnecessary, and the apparatus can be made compact. In addition, the workability is improved without the problem that the work becomes difficult due to the presence of the blocking wall.

  5 and 6 show another embodiment (embodiment 3) of the wire deterioration inspection apparatus. The electric wire deterioration inspection device 21 includes a V-groove-shaped wheel 22 and a cylindrical frame main body 23 with a slit that is suspended on the overhead power transmission line 1 by placing the wheel 22 on the overhead power transmission line 1 and the frame. A cylindrical rotating frame 24 with a slit, which is provided on the outer periphery of the main body 23 so as to be rotatable about 90 ° around the overhead power transmission line 1 within a vertical plane including the section of the overhead power transmission line, and the rotation frame 24 The X-ray generator 25 is mounted on the lower surface side of the X-ray generator 25 at a position that forms approximately 45 ° with respect to the vertical line, and the X-ray generator 25 is provided on the opposite side of 180 ° around the overhead power transmission line 1. An X-ray detection unit 26 is provided.

The X-ray generator 25 is arranged at two positions in two perpendicular directions, that is, the case where the X-ray generator 25 is arranged at the angular position shown in FIG. 5A and the case where the X-ray generator 25 is arranged at the angular position shown in FIG. Can be placed. Therefore, it is possible to take a fluoroscopic image from two directions perpendicular to the X-ray.
In this case, the X-ray irradiation direction is not directly above but 45 ° above, but even if X-rays are irradiated toward 45 ° above, there is almost no risk of irradiating a person. Therefore, the barrier wall is not necessary, and the apparatus can be made compact. In addition, the workability is improved without the problem that the work becomes difficult due to the presence of the blocking wall.

FIG. 7 shows another embodiment (embodiment 4) of the electric wire deterioration inspection apparatus. A cylindrical frame main body 23 provided with a V-groove-shaped wheel 22 and suspended on the overhead power transmission line 1 so as to be able to travel on the overhead power transmission line 1 and a vertical line on the lower surface side of the frame main body 23 X-ray generators 25 respectively attached to both side positions forming approximately 45 ° with respect to each other, and X-ray detectors provided on the opposite sides of the X-ray generators 25 about 180 ° centered on the overhead power transmission line 1 26. That is, the X-ray generator 25 and the X-ray detector 26 in the electric wire deterioration inspection apparatus 21 of FIGS. 5 and 6 are fixedly provided on the left and right.
According to this electric wire deterioration inspection device 21 ′, it is possible to easily inspect an arbitrary position by running on the overhead power transmission line, similarly to the electric wire deterioration inspection device 21 of FIGS. Also, since the X-ray generator does not have to be moved to the left and right, the inspection work efficiency is good.

5 and 6 is mounted on a self-running robot that runs on the overhead power transmission line 1 and automatically moves to a position to be inspected and X-ray imaging at that position. You can also do it.
Each of the above-described embodiments uses a set of an X-ray generator and an X-ray detector, and performs inspection in two directions at right angles by moving the set. The X-ray generator and the X-ray detector It is also possible to perform inspection in two directions at right angles without moving them.
In addition, it is desirable to obtain a fluoroscopic image in two directions by irradiating X-rays from two directions at right angles. However, if it is possible to estimate the most deteriorated part on the circumference of the overhead power transmission line, the fluoroscopy from one direction It is possible to inspect the internal deterioration state even from an image. In that case, it may be configured to irradiate only from one direction. In particular, since the overhead transmission line tends to be deteriorated on the lower surface side, there are cases where the objective can be achieved only by photographing from one side of the overhead transmission line in the lateral direction.

  Moreover, although the case where an X-ray film was used as an X-ray detection part was demonstrated in the above-mentioned description, the system which does not use an X-ray film may be sufficient. For example, as schematically shown in FIG. 8, an image signal that is transmitted wirelessly by converting the transmitted X-ray information obtained by the X-ray detection unit into an image signal to any one of the above-described electric wire deterioration inspection apparatuses 31. A wireless transmission means is provided, and an image signal wirelessly transmitted from the electric wire deterioration inspection device 31 is received and an image is displayed, and a transmission / reception / image display device 32 for operating the electric wire deterioration inspection device 31 wirelessly is disposed on the ground. By operating the electric wire deterioration inspection device 31 on the overhead power transmission line by a wireless operation from, operating at a desired position, and transmitting the transmitted X-ray information detected by the X-ray detector to the ground as an image signal, It is possible to inspect the internal deterioration state while viewing the image.

The wire deterioration inspection apparatus and method of the present invention detect the internal deterioration state by image signals, but the internal state can be simplified by evaluating the intensity of transmitted X-rays using the apparatus of the present invention. It is also possible to determine. That is, as an X-ray detection unit in each of the above-described electric wire deterioration inspection apparatuses, for example, both an X-ray film and an X-ray detection sensor (a general one can be used) that can detect and output the intensity of transmitted X-ray Can be switched (or replaced).
And when inspecting a long overhead power transmission line, the internal deterioration situation is easily determined by evaluating the intensity of transmitted X-rays, and X-ray film is used for a portion with a high intensity evaluation that is required to be inspected in detail. Can be used to inspect the internal deterioration of the transmission line.
In the case of X-ray film photography, development takes time, but the intensity of transmitted X-rays can be evaluated in a short time, so if this image diagnosis and intensity evaluation are used together, it will be necessary to inspect long overhead power transmission lines. It is efficient. Since the overhead inspection of the overhead transmission line is usually required in a short period of time, the construction period can be shortened by the combined use of image diagnosis and strength evaluation, which is appropriate.
In addition, the present invention is for inspecting the internal deterioration status of the overhead power transmission line. In addition, for the wire accessories such as the straight sleeve, the repair sleeve, and the retention clamp that are compression-connected to the overhead power transmission line, the internal deterioration is also observed. It is possible to check the situation.
In addition, the electric wire deterioration inspection method of the present invention can be used in combination with other inspection devices such as an eddy current magnetic flaw detection method and an appearance observation video to perform more effective and efficient inspection.

BRIEF DESCRIPTION OF THE DRAWINGS It explains typically the electric wire deterioration inspection method of one Example of this invention, (a) is explanatory drawing seen from the overhead transmission line longitudinal direction, (b) is explanatory drawing seen from the horizontal direction of overhead transmission line It is. An example of the overhead power transmission line which is the object of the electric wire deterioration inspection method of the present invention is a sectional view of a steel core aluminum stranded wire. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of an electric wire deterioration inspection apparatus according to the present invention, where (A) shows a state before the X-ray generator is mounted, and (B) shows that the X-ray generator is hung on one X-ray generator mounting portion. (C) is a view showing a state in which the X-ray generator is hung from the other X-ray generator mounting portion. It is a side view of the electric wire deterioration inspection apparatus of FIG. The other example of the electric wire deterioration inspection apparatus of this invention is shown, (A) is the state which set the X-ray generator in one angle position of two right angle directions, (B) is the X-ray generator in the other direction. It is a figure which shows the state set to the angle position. FIG. 6 is a left side view of FIG. It is a figure which shows the further another Example of the electric wire deterioration test | inspection apparatus of this invention. It is a figure which shows the further another Example of the electric wire deterioration test | inspection apparatus of this invention.

Explanation of symbols

1 Overhead power transmission line 1a Steel wire 1b Aluminum wire (aluminum or aluminum alloy wire)
2, 14, 25 X-ray generator 3 X-ray detector 15, 26 X-ray film (X-ray detector)
4, 11, 21, 21 ', 31 Electric wire deterioration inspection device 12 Electric wire gripping fitting 12a Groove 12b Split piece 12c Hinge portion 12d Bolt / nut 13a, 13b X-ray generator mounting portion 22 Wheel 23 Frame body 24 Rotating frame 32 Transmission / image display device

Claims (10)

  The two fluoroscopic images in the two right-angled directions are directly or indirectly emitted by the X-ray detector that irradiates the overhead power transmission line with X-rays from almost two directions at right angles and receives the transmitted X-rays transmitted through the overhead power transmission line. And inspecting the internal deterioration state of the overhead power transmission line.   X-rays are applied to the overhead power transmission line from one direction, and a single fluoroscopic image is obtained directly or indirectly by the X-ray detector that receives the transmitted X-rays transmitted through the overhead power transmission line. A method for inspecting deterioration of an overhead power transmission line, characterized by inspecting an internal deterioration state. An electric wire deterioration inspection device for inspecting an internal deterioration state of an overhead power transmission line by the electric wire deterioration inspection method according to claim 1 or 2,
An electric wire gripping bracket for gripping the overhead power transmission line, an X-ray generator mounting portion provided at two orthogonal positions on the lower surface side of the wire gripping bracket within a vertical plane including the cross section of the overhead power transmission line, and the two X-rays One X-ray generator that can be attached to and detached from any of the generator attachment portions, and the electric wire gripping bracket can attach an X-ray detector on the opposite side of the X-ray generator attachment portion. Degradation inspection device. An electric wire deterioration inspection device for inspecting an internal deterioration state of an overhead power transmission line by the electric wire deterioration inspection method according to claim 1 or 2,
A frame body equipped with wheels and suspended on the overhead power transmission line so that the wheels can run on the overhead power transmission line, and approximately 90 ° centered on the overhead power transmission line within the vertical plane including the section of the overhead power transmission line. A rotating frame provided rotatably, an X-ray generator attached to the lower surface side of the rotating frame at a position that forms approximately 45 ° with respect to a vertical line, and an overhead transmission line of the X-ray generator And an X-ray detection unit provided on the opposite side of 180 °. An electric wire deterioration inspection device for inspecting an internal deterioration state of an overhead power transmission line by the electric wire deterioration inspection method according to claim 1 or 2,
A frame body which is mounted on an overhead power transmission line and suspended on the overhead power transmission line so as to be able to run on the overhead power transmission line, and is attached to both sides of the lower surface side of the frame main body at approximately 45 ° with respect to the vertical line. An X-ray generator and an X-ray detector provided on the opposite side of 180 ° centering on the overhead power transmission line of each X-ray generator.   From an X-ray generator that grips an overhead power transmission line with a wire gripping bracket that grips the overhead power transmission line, and that is attached to one of two generally orthogonal positions on the lower surface side of the wire gripping bracket within a vertical plane that includes the cross section of the overhead power transmission line The X-ray is irradiated toward the power transmission line, and a fluoroscopic image of the power transmission line is obtained by an X-ray detection unit integrally provided on the opposite side of 180 ° centering on the power transmission line of the X-ray generator. The X-ray generator is transferred to the other of the places, and X-rays are emitted from the X-ray generator toward the power transmission line, and a fluoroscopic image is obtained by the X-ray detection unit on the opposite side of 180 °, and these are substantially perpendicular to each other. An electric wire deterioration inspection method for an overhead power transmission line, wherein an internal deterioration state of the overhead power transmission line is inspected based on two perspective images in two directions.   Move the frame body suspended from the overhead power transmission line with the wheels on the overhead power transmission line, stop at a predetermined position to be inspected, and place the power transmission line on the frame body within the vertical plane including the cross section of the overhead power transmission line. The X-ray generator irradiates X-rays toward the power transmission line from the X-ray generator attached to the lower surface side of the rotating frame provided to be rotatable about 90 ° as the center, at a position that makes about 45 ° with respect to the vertical line, After obtaining a fluoroscopic image of the transmission line by an X-ray detection unit integrally provided on the opposite side of 180 ° centered on the overhead transmission line of the X-ray generator, and then rotating the rotary frame by approximately 90 °, X X-rays are radiated from the line generator toward the power transmission line, and the X-ray detection unit on the opposite side of 180 ° obtains a fluoroscopic image of the power transmission line, based on these two fluoroscopic images in two substantially perpendicular directions, Specially inspecting the internal deterioration status of overhead transmission lines Inspection method for deterioration of overhead power transmission lines.   Move the frame body suspended from the overhead power transmission line with the wheels on the overhead power transmission line, stop at a predetermined position to be inspected, and make approximately 45 ° to the vertical line on the lower surface side of the frame main body Two X-ray generators attached to the respective positions are irradiated with X-rays toward the transmission lines, and are integrally provided on the opposite sides of 180 ° centered on the overhead transmission lines of the respective X-ray generators. Transmission line inspection of overhead transmission lines, characterized in that a transmission line perspective image is obtained by two X-ray detectors, and the internal deterioration state of the overhead transmission line is inspected based on these two perspective images in two substantially perpendicular directions Method.   The radiographic image information detected by the X-ray detection unit is wirelessly transmitted to the ground as an image signal, the wireless image signal is received by a ground receiving device, and the internal deterioration state is inspected while viewing the image. The electric wire deterioration inspection method according to claim 1, 2, 6, 7, or 8. The X-ray detection unit can detect the intensity of transmitted X-rays together with the fluoroscopic image. The intensity at which it is determined that a detailed inspection is necessary by simply determining the internal deterioration status by evaluating the intensity of the transmitted X-rays. 9. The electric wire deterioration inspection method according to claim 1, 2, 6, 7, or 8, wherein an internal deterioration state is inspected by a fluoroscopic image at a highly evaluated part.

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