JP2006071350A - Method and apparatus for diagnosing deterioration of insulated covered wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deterioration diagnosing method of a lightweight insulated sheathed wire made operable by on person by simplifying a structure. <P>SOLUTION: In the deterioration diagnosing method for diagnosing the degree of deterioration such as disconnection, cracking, rusting and the like of the insulated sheathed wire (hereinbelow referred as an electric wire) 15 constructed between utility poles, two almost C-shaped detection blocks 2 and 3 equipped with opening parts 30, 31 and 32 in which the electric wire 15 is inserted and having coils 22 and 23 for detecting the deterioration degree of the electric wire 15 are arranged vertically and horizontally so as to leave an appropriate interval in a state that the electric wire 15 can be taken in and out of the opening parts 30 and 31 of two detection blocks 2 and 3 and wrapped by the detection blocks. The inner surfaces of the coils 22 and 23 of two detection blocks 2 and 3 are arranged so as to be brought into contact with the electric wire 15 at two or above places. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for diagnosing deterioration of an insulation-coated electric wire comprising a stranded metal wire (conductor) and this covering, and in particular, can accurately diagnose the degree of deterioration such as disconnection, cracking, rusting, etc., and the outer surface of the electric wire. The present invention relates to a device for diagnosing deterioration of an insulated wire that can make an accurate diagnosis even if there is a fin for difficult snowfall.

  As shown in FIG. 13, an insulation-coated electric wire (hereinafter simply referred to as an electric wire) 15 is installed between electric poles 20 and 20 at an interval L standing from the ground 19. The electric wire 15 is damaged on the outer surface by long-term or long-term use, and deterioration such as cracks, rusting, and breakage occurs. Continuing to use the product without noticing this deterioration may cause unexpected troubles and cause great damage. For this reason, an insulation coated wire deterioration diagnosis device (hereinafter simply referred to as a diagnosis device) 1 for diagnosing the degree of deterioration has been adopted.

  14 and 15 show one embodiment of the electric wire 15. As shown in FIG. 15, the electric wire 15 is formed of an elongated wire body in which a conductor composed of a plurality of stranded wires 17 is housed in a covering body 18. In general, there may be no protrusion on the outer surface of the electric wire 15, but in the snowfall area, as shown in FIG. 14 and FIG. FIG. 15 shows a cross-sectional structure of the entire electric wire 15 in each cross section.

  FIG. 16 shows the relationship between the state of bonding of the coil 22 (23), which is one of the deterioration degree detection units of the diagnostic apparatus 1, and the electric wire 15, and the eddy current 24 generated by this bonding. As will be described later, the degree of deterioration of the electric wire is determined based on the form of the eddy current 24. In order to accurately detect the coil 22 (23), the electric wire 15 and the coil 22 (23) need to be in close contact as shown in FIG. However, when there is a difficult-to-snow fin 16, the difficult-snow fin 16 comes into contact with the coil 22 (23), and a gap is generated between the electric wire 15 and the coil 22 (23). There was a problem that could not be. Note that the closer the distance between the stranded wire 17 (conductor) and the coil 22 (23), the higher the detection sensitivity, and the S / N ratio becomes worse due to lift-off when the relative distance between the conductor and the coil changes. Accordingly, when the coil 22 (23) passes through the difficult snow landing fin 16, the distance to the conductor increases, so that the detection sensitivity is lowered, lift-off occurs, and the S / N is deteriorated.

As one of the solutions, there is a detection device as shown in FIGS. 18 (a) and 18 (b) and FIGS. 19 (a) and 19 (b). For example, the one shown in FIGS. 18A and 18B is a block 25 in which a concave portion 27 into which the difficult-to-fall snow fins 16 are formed is formed. As shown in FIG. 14, the difficult-to-snow fin 16 gradually tilted when erected, and the position of the difficult-to-snow fin 16 was not constant. Therefore, it is necessary to rotate the block 25 having the coil 22 (23) along the difficult-to-snow fin 16 as the deterioration detecting device is operated on the electric wire 15. 19 (a) and 19 (b) are also provided with a recess 29 into which the hard snow fin 16 enters, which is also shown in the figure as the apparatus moves. Need to rotate. For this reason, there is a problem that a frictional force acts between the difficult snow accretion fin 16 and the recess 29, and the apparatus cannot be moved smoothly. There are various known techniques, for example, “Patent Document 1”.
Japanese Examined Patent Publication No. 4-39622 (all pages)

  The “self-propelled rust detecting device” disclosed in Japanese Patent Publication No. 4-39622 of Patent Document 1 accurately detects rusting of the cable to be inspected (the same as the electric wire 15 described above), and the cable to be inspected is rusted. It self-runs along the cable to be inspected while pressing the detection coil closely, receives a detection signal from the rust detection coil on the ground side, and detects and determines the rusting condition.

  Although the conventional technique and the known technique described above can detect and detect the degree of deterioration and rusting of the electric wire 15 or the like, when the electric wire 15 has the fin 16 for difficult snow formation as described above, the coil 22 and the electric wire 15 may be insufficient, and there is a problem that an accurate diagnosis of deterioration cannot be made. Further, even in the case of the known technique, if there is a difficult snow accretion fin 16, the contact between the cable to be inspected and the coil becomes insufficient, and there is a problem that accurate detection cannot be performed.

The present invention has been invented to solve the above problems, and is formed in a relatively small size and light weight. Especially, even if there is a fin for difficult snow accretion, it is not affected by the crack and rust of the electric wire. An object of the present invention is to provide a method for diagnosing insulation-coated electric wires that can reliably detect and detect the degree of deterioration such as disconnection.
An object of the present invention is to provide a lightweight insulation-coated wire deterioration diagnosis device that can be operated by one person with a simple structure.

  In order to achieve the above-mentioned object, the present invention is directed to diagnosing the degree of deterioration such as disconnection, cracks, rusting, etc. of an insulation-coated electric wire (hereinafter referred to as an electric wire) installed between utility poles. A method for diagnosing deterioration of a wire, comprising two openings, substantially U-shaped, having an opening for inserting the wire and having a coil for detecting the degree of deterioration of the wire, vertically and horizontally at an appropriate interval. The two detection blocks are arranged so that the electric wires can be put in and out of the openings of the two detection blocks so as to wrap the electric wires. It is the structure of the insulation coating electric wire deterioration diagnostic method arrange | positioned in the position which can contact an electric wire.

The invention of claim 2 is a deterioration diagnosis device for diagnosing the degree of deterioration such as disconnection, cracking, rusting, etc. of an insulation-covered electric wire (hereinafter referred to as an electric wire) installed between utility poles. A pair of guide rollers provided on the apparatus main body side to be suspended and mounted and guided along the electric wire, and arranged between the guide rollers and arranged at an appropriate interval for detecting the degree of deterioration of the electric wire. A pair of substantially U-shaped detection blocks having a coil and a signal processing unit for processing a detection signal from the coil. It has a possible opening and is supported on the apparatus main body side so as to be able to move up and down and rotate, and the inner surface of the coil of the detection block is arranged at a position where two or more places can contact the electric wire as a whole. And it features.

  According to a third aspect of the present invention, there is provided a ground solution for receiving a signal from the signal processing unit for processing a detection signal from a coil of a detection block on the ground side where the electric wire is installed, and displaying the degree of deterioration in a broken manner. A folding display is provided.

  According to a fourth aspect of the present invention, there is provided a configuration of an insulation-coated wire deterioration diagnosis apparatus that includes the guide roller and the pair of detection blocks, and includes a drive unit that allows the apparatus main body to self-run.

  Further, the invention of claim 5 is a deterioration diagnosis apparatus for diagnosing the degree of deterioration such as disconnection, cracking, rusting, etc. of an insulation-coated electric wire (hereinafter referred to as an electric wire) installed between electric poles, A pair of guide rollers provided on the apparatus main body side to be suspended and mounted to guide the apparatus along the electric wires, and disposed between the guide rollers and arranged at an appropriate interval to detect the degree of deterioration of the electric wires Comprising a pair of substantially U-shaped detection blocks having a coil for and a signal processing unit for processing a detection signal from the coil, the detection block being capable of entering and exiting the wire. A degree of deterioration in which the coil body is supported on the apparatus main body side so as to be able to move up and down and rotate, and the inner surface of the coil is disposed at a position where two or more portions can contact the wire as a whole. Method In this method, the first procedure for mounting the device on the diagnostic wire and the waveform amplitude and phase angle of the signal sent from the device to the ground breaking display are suitable for the insulated wire. And a second procedure for performing a determination of deterioration.

  The insulation coated electric wire deterioration diagnosis method of the present invention has a simple structure and a detection block formed in a substantially U-shaped cross section, which is arranged in a vertical and horizontal manner with a predetermined interval. Even if it is a wire with snow fins, even if there is a fin for difficult snow accretion while the device moves on the wire, the coil inner surface of the detection block will be in contact with the wire at two or more locations, so that the degree of deterioration of the covered wire wire can be ensured. It can be measured.

  According to the second aspect of the present invention, since the insulated coated electric wires guided by the guide rollers have the openings of the pair of detection blocks opened in the same direction, the electric wires are easily and smoothly inserted into the openings. Since the detection block is supported by the apparatus main body so as to be able to move up and down and rotate, the electric wire inserted into the opening smoothly contacts the inner surface of the coil of the detection block. As a result, an accurate detection signal is sent from the coil to the signal processing unit, and the deterioration degree is accurately diagnosed. In addition, the engagement / disengagement between the insulated wire and the detection block is smoothly performed by forming the opening.

  Further, according to the present invention, since the two detection blocks are combined vertically and horizontally, the outer surface other than the fin portion is directly connected to the inner surface of the coil even if the outer surface of the insulation-coated electric wire has a protruding portion of the difficult-to-fall snow fin portion. Therefore, the signal from the signal processing unit can be sent to the ground breaking display and an accurate diagnosis can be performed remotely on the ground.

  Moreover, according to the invention of claim 4, the diagnostic efficiency can be improved by making the device a self-propelled structure.

  Further, according to the invention of claim 5, cracks are analyzed by analyzing the waveform amplitude and phase angle of signals emitted from a pair of blocks as diagnostic criteria for the degree of deterioration using judgment values suitable for the insulated wire. It is possible to accurately diagnose the state such as rusting fracture.

Hereinafter, based on the Example of the insulation coating electric wire degradation diagnostic method and degradation diagnostic apparatus of this invention, it explains in full detail with reference to drawings.
FIG. 1 is a schematic configuration diagram showing main components of an insulation-coated wire deterioration diagnosis device of the present invention. FIG. 2 is a front view schematically showing the main components of FIG. FIG. 3 shows the structure of the first block 2 and the second block 3.
The insulation-coated wire deterioration diagnosis device 1 includes a device main body 6 that pivotally supports the operation rod 9, a pair of guide rollers 7 and 8 that are pivotally supported at appropriate positions at the left and right positions of the device main body 6 in FIG. The first block 2 and the vertical position (coil up and down) are arranged in a substantially U-shaped horizontal position between the guide rollers 7 and 8 (from the front to the back in FIG. 1). Block 3. The first block 2 and the second block 3 are fitted to vertical movement guide rails 4 and 5 fixed to the apparatus main body 6 side, and are guided in the vertical movement direction. Further, it is supported on the apparatus main body 6 side so as to be rotatable by pins 10 and 11 fixed on the vertical movement guide rails 4 and 5 side. The apparatus main body 6 is provided with a signal processing unit 12, a radio unit 13, and a driving unit 14 (shown in FIG. 4).

As described above, the first block 2 and the second block 3 are fixed to the apparatus body 6, and the first block 2 and the second block 3 have a pair of coils 22 and 22 and coils 23 and 23. It is provided with a predetermined interval. The coils 22 and 23 are configured to contact the outer peripheral surface of the electric wire 15 and generate an eddy current 24 in the stranded wire 17, but the detailed description thereof is omitted.

The first block 2 is arranged in a lateral position (from the front to the back in FIG. 1) so as to form an opening 30 below, and the U-shaped first block body 2a and the opening 30 are arranged. It consists of a pair of coils 22, 22, etc., sandwiched between them, and is pivotally supported on the apparatus main body 6 (not shown) side by the pins 10 as described above. Further, it is supported on the apparatus main body 6 so as to be movable up and down by a guide rail 4 (FIG. 1) not shown. On the other hand, in the second block 3, a U-shaped second block main body 3a having an opening 31 is arranged in a vertical position, and a pair of coils 23, 23 arranged with the opening 31 of the block main body 3a interposed therebetween. As described above, it is pivotally supported on the side of the apparatus main body 6 (not shown) by the pin 11 and supported by the apparatus main body 6 so as to be vertically movable by a guide rail 5 for vertical movement (not shown). .

The first block main body 2a and the second block main body 3a are arranged in a direction substantially orthogonal to each other, and the opening 30 and the opening 31 are also arranged in a direction substantially orthogonal to each other at a position where they overlap each other. The opening 30 and the opening 31 form a common opening 32 with respect to one direction inclined in an overlapping state. For this reason, the electric wire 15 can enter the first block 2 and the second block 3 from the opening 32, and the electric wire 15 enters the opening 32 as shown in the figure, and the coils 22, 22 and coil 23 and 23 abut.

  FIG. 4 shows the structure of the insulation-coated wire deterioration diagnosis device 1 shown in FIG. 1 in an easy-to-understand manner. An AC power supply 33 is connected to the coils 22 and 22 and the coils 23 and 23 and the signal processing unit 12.

  FIG. 5 shows a configuration of a detection unit including the first block 2 and the second block 3 and a signal processing unit for processing the detected signal. The detection unit includes an AC power source 33 having a transmitter 34, a power amplifier 35, and the like, and a coil 22 (coil 23) connected thereto. The signal processing unit 12 connected to the coil 22 (coil 23) includes an amplifier 36, a filter circuit 37, a synchronous detection circuit 38, and the like. FIG. 6 shows the engagement state between the guide roller 7 (8) and the electric wire 15, and the electric wire 15 is set at a predetermined position by the guide roller 7 (8). It is guided along the electric wire 15 by the guide roller 7 (8).

  7 and 8 show the operation of the insulation-coated wire deterioration diagnosis device 1 of the present invention. When the electric wire 15 and the fin 16 for difficult snow attachment are fitted to the first block 2 and the second block 3 in the state of FIG. 7, the outer peripheral surface of the electric wire 15 is placed on the coils 22, 22 of the first block 2. , And the hard snow fin 16 does not contact the coils 22 and 22. In addition, the electric wire 15 is in contact with the coils 23 and 23 with respect to the second block 3. For this reason, the defect of the electric wire 15 is smoothly detected by the coil 22 and the coil 23, the detection signal is processed, and it is sent to the ground breaking display 21 side.

  On the other hand, as shown in FIG. 8, when the electric wire 15 and the difficult snow fin 16 are fitted to the first block 2 and the second block 3, the outer peripheral surface of the electric wire 15 is coiled 22 by the difficult snow fin 16. However, when the first block 2 or the second block 3 is moved up and down or turned, one of the coils 22 and 22 or one of the coils 23 and 23 is connected to the wire 15. The outer peripheral surface is always in contact. In the case shown in FIG. 8, the outer peripheral surface of the electric wire 15 is in contact with the coil 22 and the coils 23 and 23. Moreover, the outer peripheral surface of the electric wire 15 contacts at least one of the coil 22 and the coil 23. For this reason, the outer periphery of the electric wire 15 always comes into contact with at least one of the coil 22 and the coil 23 regardless of how the electric wire 15 and the insulation covered electric wire deterioration diagnosis device 1 are fitted. For this reason, a signal is smoothly detected from the coils 22 and 23.

A method for detecting the degree of disconnection and rust by the deterioration diagnosis apparatus of the present invention will be described.
When the coil 22 or the coil 23 and the electric wire 15 are in contact, the device 1 mounted on the electric wire 15 is caused to travel. When a current flows through the electric wire 15, an AC magnetic flux 50 is generated in the axial direction of the electric wire 15 when a high-frequency AC voltage is applied to the coils 22, 22, 23, 23 arranged around the electric wire 15. Eddy current 24 is generated by this AC magnetic flux (see FIG. 9).
FIG. 10 shows a state in which the electric wire 15 is not defective. The magnetic flux 52 generated by the load current 51 flowing through the electric wire 15 and the alternating magnetic flux 50 generated by the four coils 22 and 23 are orthogonal, and the electric wire 15 Therefore, the coils 22 and 23 are not affected by the commercial power source. FIG. 11 shows a case where the electric wire 15 has a defect 39 (disconnection or scratch), and the direction of the alternating magnetic flux 52 changes with the change in the flow of the load current 51 flowing through the electric wire 15. The influence exerted by the filter circuit 37 is removed, and the influence of the same commercial power supply is not affected. The detection signals of the coils 22 and 23 obtained from the change in the eddy current 24 are processed by the signal processing unit 12 and then sent to the ground breaking display machine 21. Fifteen defects can be diagnosed.

FIG. 12 shows an example of the unfolding display by the ground unfolding display 21. FIG. 12A shows a state where the electric wire 15 is disconnected and rust is not generated. Moreover, FIG.12 (b) shows the state in which the electric wire 15 without a disconnection is rusting.

  Since the insulation-coated wire deterioration diagnosis device of the present invention has a simple structure, the operation rod 9b fixed to the operation rod 9 is gripped to the opening 30 of the first block 2 and the opening 31 of the second block 3. The electric wire 15 is inserted, and the guide rollers 7 and 8 are suspended from the electric wire 15. Next, when the operation rod 9 is pushed down, the rods 9a and 9a, which are mechanisms for preventing the wires from falling off, are positioned below the wires 15. If it moves along the electric wire 15 in such a state, it will move within the opening part 30 of the 1st block 2, and the opening part 31 of the 2nd block 3, and deterioration detection will be performed. Although the difficult snow fin 16 is located on both sides of the electric wire 15, the position of the difficult snow fin 16 is slightly shifted when the overhead wire is connected. Different (see FIGS. 7 and 8).

  The insulation coated electric wire deterioration diagnosis device of the present invention is used for diagnosis of defects in insulation coated electric wires installed between utility poles, but is not limited to the electric wires, and various types that may cause disconnection, cracks, and rusting. It can be applied to other electric wires and has a wide range of use. In particular, even if there is a difficult snow landing fin provided on an electric wire in a snowfall region, it is possible to reliably detect a defect, so that it can be used in a snowy country.

It is a typical front view which shows the whole structure of the insulation coating electric wire deterioration diagnostic apparatus of this invention. It is a front view which shows the structure around the coil of the principal part of the insulation coating electric wire degradation diagnostic apparatus of this invention, and the fitting state of a coil and an electric wire. It is a front view which shows the shape of the 1st block and 2nd block of this invention, and the engagement state of these and an electric wire. It is a block diagram which shows the outline | summary structure of the main elements of the insulation coating electric wire deterioration diagnostic apparatus of this invention. It is a block diagram which shows the detailed structure of the detection part and the signal processing part of the electric wire defect of the insulation coating electric wire deterioration diagnostic apparatus of this invention. It is a side view which shows the engagement state of the guide roller and electric wire of the insulation coating electric wire deterioration diagnostic apparatus of this invention. It is a front view which shows an example of the engagement state of the 1st and 2nd block of this invention, and an electric wire. It is a front view which shows the other example of the engagement state of the 1st and 2nd block of this invention, and an electric wire. It is a schematic diagram which shows the state of the alternating current magnetic flux and eddy current which generate | occur | produce between the coil and electric wire of this invention. It is a schematic diagram which shows the state of the load current and alternating current magnetic flux by a commercial power source when there is no defect in an electric wire. It is a schematic diagram which shows the state of the load current and alternating current magnetic flux by a commercial power source when an electric wire has a defect. It is a display screen figure which shows the display method of the defect in the ground breaking display apparatus of this invention. It is a schematic diagram which shows the installation state of an electric wire, and the insulation coating electric wire deterioration diagnostic apparatus which diagnoses the defect of this electric wire. It is a front view which shows the shape of the electric wire diagnosed by this invention. It is a cross-sectional view in the AA line of FIG. 14, BB line, and CC line. It is a schematic diagram which shows the engagement state of an electric wire and the coil of an insulation coating electric wire deterioration diagnostic apparatus. It is a front view which shows the engagement state of the conventional coil and electric wire. It is a front view which shows the engagement state of the conventional coil and electric wire. It is a front view which shows the engagement state of the conventional coil and electric wire.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Insulation coated electric wire deterioration diagnostic apparatus 2 1st block 2a 1st block main body 3 2nd block 3a 2nd block main body 4 Vertical movement guide rail 5 Vertical movement guide rail 6 Apparatus main body 7 Guide roller 8 Guide roller 9 Operation Rod 9a Rod 9b Operation rod 10 Pin 11 Pin 12 Signal processing unit 13 Radio unit 14 Drive unit 15 Electric wire 16 Fin for difficult to snow 17 Stranded wire 18 Cover 19 Ground 20 Electric pole 21 Ground breaking display 22 Coil 23 Coil 24 Vortex Current 25 block 27 block recess 28 block 29 block recess 30 opening 31 opening 32 opening 33 AC power supply 34 transmitter 35 power amplifier 36 amplifier 37 filter circuit 38 synchronous detection circuit 39 defect 50 AC magnetic flux 51 commercial power supply 52 AC Magnetic flux

Claims (5)

A deterioration diagnosis method for diagnosing the degree of deterioration such as disconnection, cracks, rusting, etc. of insulated wires installed between utility poles,
There are two substantially U-shaped detection blocks each having an opening into which the insulated wire is inserted and having a coil for detecting the degree of deterioration of the insulated wire, and the opening direction of the openings is the same with an appropriate interval. Then, the insulation-coated electric wires can be put in and out of the opening portions of the two detection blocks so as to wrap them, and the inner surfaces of the coils of the two detection blocks are 2 as a whole. 2. The insulation covered electric wire deterioration diagnosis method, wherein the two detection blocks are arranged at positions where the two insulation blocks can be brought into contact with the insulation covered electric wire at more than one place. A deterioration diagnosis device for diagnosing the degree of deterioration such as disconnection, cracks, rusting, etc. of insulated wires installed between utility poles,
A pair of guide rollers that are suspended and mounted on the insulation-coated electric wire and arranged so that the apparatus main body moves and guides along the insulation-coated electric wire;
A pair of substantially U-shaped detection blocks disposed between the pair of guide rollers, having a coil for detecting the degree of deterioration of the insulation-coated electric wires disposed at an appropriate interval;
A signal processing unit for processing a detection signal from the coil of the detection block;
The detection block includes an opening through which the insulated wire can enter and exit and can wrap the wire, and the detection block is supported on the apparatus main body side so as to be vertically movable and rotatable. 2. The insulation coated electric wire deterioration diagnosis device, wherein the coil surfaces of the block are arranged at positions where they can contact the insulation coated electric wire at two or more places as a whole.   On the ground side on which the insulated wire is laid, a ground unfolding indicator is attached for receiving a signal from the signal processing unit for processing a detection signal from a coil of the detection block and unfolding and displaying the degree of deterioration. The insulation coated electric wire deterioration diagnosis device according to claim 1 or 2, wherein   4. The insulation-coated wire deterioration diagnosis device according to claim 1, wherein the device main body including the guide roller and the pair of detection blocks includes a drive unit so as to be able to run on its own. 5. A deterioration diagnosis device for diagnosing the degree of deterioration such as disconnection, cracks, rusting, etc. of insulated wires installed between utility poles,
A pair of guide rollers provided on the apparatus main body side to be suspended and mounted on the insulation-coated electric wire and to move and guide the device along the insulation-coated electric wire, and arranged between the guide rollers, with an appropriate interval A pair of substantially U-shaped detection blocks having a coil for detecting the degree of deterioration of the insulated sheathed wire, and a signal processing unit for processing a detection signal from the coil,
The detection block has an opening through which the electric wire can enter and exit and can enclose the insulation-coated electric wire, and is supported on the apparatus main body side so as to be vertically movable and rotatable. The inner surface of the coil as a whole is at two or more locations. A method for diagnosing the degree of deterioration by an insulation-coated wire deterioration diagnosis device disposed at a position where the insulation-coated wire can be contacted, the first procedure for mounting the device on a wire to be diagnosed, and from the device to the ground Insulation coating characterized by comprising a second procedure for analyzing the waveform amplitude and phase angle of a signal sent to a folding display using a judgment value suitable for the insulation coated electric wire and judging deterioration Electric wire deterioration diagnosis method.

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