WO2018229830A1

WO2018229830A1 - Deterioration determining device

Info

Publication number: WO2018229830A1
Application number: PCT/JP2017/021655
Authority: WO
Inventors: 靖夫熊谷
Original assignee: 中国電力株式会社
Priority date: 2017-06-12
Filing date: 2017-06-12
Publication date: 2018-12-20
Also published as: JP6547918B2; JPWO2018229830A1

Abstract

This deterioration determining device determines the degree of deterioration of an insulating coating body that covers an electric wire. The deterioration determining device is provided with: a first plate member in contact with a first region of the insulating coating body; a first sensor, which is integrally provided with respect to the first plate member, and which detects that the thickness of the first region is equal to a predetermined thickness or less; and a supporting member that supports the first plate member.

Description

Degradation judgment device

The present invention relates to an apparatus for determining deterioration of an insulation coating that covers an electric wire.

For example, a single-phase three-wire lead wire drawn into a house is integrally formed by twisting three insulated wires. However, since the lead-in wire is exposed to an outdoor natural environment (for example, ultraviolet rays from sunlight), the insulating coating gradually deteriorates, and the thickness of the insulating coating gradually decreases. For this reason, in order to prevent the accident of a lead-in line, the operation | work which replaces an existing lead-in line with a new lead-in line is needed.

In order to determine the deterioration state of the insulation of the lead-in wire, a maintenance inspection is performed in which an inspector goes to the site. Examples of the maintenance inspection method include a method in which an inspector visually observes the insulation of the lead-in wire from the ground and a method of checking the insulation of the lead-in wire through a CCD camera attached to the tip of a long operation rod (for example, Patent Document 1).

JP 2002-291125 A

Here, in the former case, the inspector directly looks at the insulation of the lead-in wire, and in the latter case, the inspector confirms the captured image of the insulation of the lead-in wire by the CCD camera (inspection of the lead-in wire indirectly). Therefore, both maintenance and inspection methods are different. However, both maintenance inspections require the inspector's own judgment, so the criteria for judging the degree of deterioration of the lead-in varies according to the skill level of the inspector, and the degree of deterioration of the lead-in is objective. There was a possibility that it could not be judged.

Therefore, an object of the present invention is to provide a deterioration determination device that can objectively determine the degree of deterioration of an insulating covering of an electric wire (for example, a lead-in wire).

The main present invention that solves the above-mentioned problem is a deterioration determination device that determines the degree of deterioration of an insulating covering that covers an electric wire, the first plate member that contacts the first region of the insulating covering, and A first sensor provided so as to be integrated with the first plate member, and detecting that the thickness of the first region is equal to or less than a predetermined thickness; and a support member that supports the first plate member. Prepare.

Other features of the present invention will become apparent from the accompanying drawings and the description of the present specification.

According to the present invention, it is possible to objectively determine the degree of deterioration of the insulating coating covering the electric wire (for example, the lead-in wire).

It is a perspective view which shows the construction example of the power distribution equipment containing the lead-in wire drawn in to a house. It is a perspective view which shows an example of the lead wire drawn in to a house. It is a perspective view which shows the deterioration determination apparatus which concerns on this embodiment. It is a perspective view which shows a mode that the deterioration determination apparatus which concerns on this embodiment is contacting the lead-in wire. In the degradation determination apparatus which concerns on this embodiment, it is a top view which shows the back surface of the 1st board member before integrating, the 2nd board member, and the 3rd board member. In the deterioration determination apparatus which concerns on this embodiment, it is a top view which shows the side surface of the 1st board member, 2nd board member, and 3rd board member before being integrated. In the degradation determination apparatus which concerns on this embodiment, it is another top view which shows the side surface of the 1st board member, 2nd board member, and 3rd board member before being integrated. In the degradation determination apparatus which concerns on this embodiment, it is a top view which shows the 1st board member after integrating, the 2nd board member, and the side surface of a 3rd board member. FIG. 5 is a block diagram showing an example of functions of first to third sensors used in the deterioration determination device according to the present embodiment. It is a figure which shows a mode that the deterioration determination apparatus which concerns on this embodiment was made to contact | abut to the lead-in wire. It is a figure which shows the other mode which made the deterioration determination apparatus which concerns on this embodiment contact the lead-in wire. It is a figure which shows the other mode which made the deterioration determination apparatus which concerns on this embodiment contact the lead-in wire. It is a figure which shows the other mode which made the deterioration determination apparatus which concerns on this embodiment contact the lead-in wire. It is a figure which shows a mode that the deterioration determination apparatus which concerns on this embodiment was made to contact | abut to a horizontal lead wire. It is a figure which shows a mode that the deterioration determination apparatus which concerns on this embodiment was made to contact | abut to the inclined lead wire.

At least the following matters will become clear from the description of this specification and the accompanying drawings.

=== Example of installation of power distribution equipment ===
FIG. 1 is a schematic diagram for explaining an example of power distribution equipment including a lead-in wire drawn into a house. The distribution line is, for example, a single-phase three-wire system, but for convenience of explanation, the distribution line, the branch line, and the lead-in line are shown as a single electric wire.

In FIG. 1, a pull-down line 103 branched from a distribution line 102 installed on a power pole 101 is stepped down to a predetermined voltage and then connected to a lead-in line 105 via a lead-in branch terminal box 104. The lead-in line 105 is connected to a house 106. Has been drawn. In this way, commercial power is supplied to the house 106 through the lead-in wire 105.

=== Lead-in wire ===
FIG. 2 is a perspective view showing an example of a lead-in wire drawn into a house.

Each of the three electric wires 105A constituting the single-phase three-wire lead-in wire 105 is covered with an insulating covering 105B made of an insulating material. Then, the three electric wires 105A covered with the insulating cover 105B are integrally formed in a twisted state.

=== Configuration Example of Degradation Determination Device ===
FIG. 3 is a perspective view showing the deterioration determination device according to the present embodiment. FIG. 4 is a perspective view illustrating a state in which the deterioration determination device according to the present embodiment is in contact with the lead-in wire. 3 and 4, the Z axis is an axis along the longitudinal direction of the operation rod described later, the X axis is an axis orthogonal to the Z axis, and the Y axis is The axis is orthogonal to the X axis and the Z axis.

In order to determine the degree of deterioration of the lead-in wire 105, the deterioration determination device 200 detects the thickness of the insulation covering body 105B that covers the three electric wires 105A in the lead-in wire 105, and insulates at least one of the electric wires 105A. When the thickness of the covering 105B is equal to or less than a predetermined thickness, the device notifies the inspector that it is time to replace the lead-in wire 105. The predetermined thickness is a thickness set in advance to prevent an accident caused by the lead-in wire 105.

Here, since the cross section of the lead-in wire 105 has a substantially triangular shape, the deterioration determination device 200 has a structure capable of simultaneously detecting the thickness of the wire covering 105B of the three wires 105A. Is desirable.

Therefore, the deterioration determination device 200 can detect the thickness of the wire covering 105B of the three electric wires 105A at the same time, the first plate member 201, the first sensor 202, the second plate member 203, the second sensor. 204, the 3rd board member 205, the 3rd sensor 206, the operation stick | rod 207, and the universal joint 208 are comprised.

Although details will be described later, the first plate member 201, the second plate member 203, and the third plate member 205 are integrally formed so that the thicknesses of the wire covering bodies 105B of the three electric wires 105A can be detected simultaneously. Has been.

The operation rod 207 is a rod member that has a long shape with a tip reaching the lead-in wire 105 when an inspector on the ground grips it. Note that the height from the ground to the lead-in wire 105 between the pole transformer 101 and the house may vary depending on the location, so it is desirable that the operation rod 207 is extendable.

The universal joint 208 includes a first plate member 201 and a tip of the operation rod 207 so that the first plate member 201, the second plate member 203, and the third plate member 205 can move freely with respect to the operation rod 207. Is bound between.

The first plate member 201 is a flat plate member having a quadrangular shape, and the universal joint 208 is coupled to the front surface 201A (+ Z side), and the insulating cover 105B is in contact with the back surface 201B (−Z side). The first sensor 202 determines whether or not the thickness of the insulating cover 105B is equal to or less than a predetermined thickness in a state where the back surface 201B is in contact with the insulating cover 105B (the contact area at this time is the first area). Is embedded in the first plate member 201 so as to be detected. For convenience of explanation, it is assumed that the front surface 201A and the back surface 201B are in an initial state along an XY plane formed by the X axis and the Y axis.

The second plate member 203 is a flat plate member having a quadrangular shape, and the insulating cover 105B contacts the back surface 203B (−X side) opposite to the front surface 203A (+ X side). The second sensor 204 determines whether or not the thickness of the insulating cover 105B is equal to or less than a predetermined thickness when the back surface 203B is in contact with the insulating cover 105B (the contact area at this time is the second area). Is embedded in the second plate member 203 so as to be detected. The second plate member 203 is pivotally supported on the first side of the first plate member 201 (the + X side along the Y axis). When the deterioration determination device 200 is in contact with the lead-in wire 105, the rotation axis of the second plate member 203 is an axis along the longitudinal direction of the lead-in wire 105. Further, the second plate member 203 is elastically biased with respect to the first plate member 201 so that the back surface 203B of the second plate member 203 approaches the back surface 201B of the first plate member 201. Further, when the second plate member 203 rotates against the elastic force, the angle between the back surface 201B of the first plate member 201 and the back surface 203B of the second plate member 203 is, for example, about 120 degrees at the maximum. In addition, the rotation range of the second plate member 203 is restricted.

The third plate member 205 is a flat plate member having a quadrangular shape, and the insulating cover 105B contacts the back surface 205B (+ X side) opposite to the front surface 205A (−X side). The third sensor 206 determines whether or not the thickness of the insulating cover 105B is equal to or less than a predetermined thickness in a state where the back surface 205B is in contact with the insulating cover 105B (the contact area at this time is the third area). Is embedded in the third plate member 205. The third plate member 205 is in a state where the angle between the back surface 201B of the first plate portion 201 and the back surface 205B of the third plate member 205 is fixed to about 120 degrees and the rotation axis of the second plate member 203. Are coupled to the first plate member 201 so as to slide in a direction orthogonal to the direction (a direction along the X axis). When the deterioration determination device 200 is in contact with the lead-in wire 105, the sliding direction of the third plate member 205 is a direction orthogonal to the longitudinal direction of the lead-in wire 105. Further, the third plate member 203 is elastically biased with respect to the first plate member 201 so that the back surface 205B of the third plate member 205 approaches the back surface 203B of the second plate member 203. When the third plate member 205 slides against the elastic force, the third plate member 205 is near the second side on the opposite side of the first plate member 201 (the −X side side along the Y axis). The sliding range of the third plate member 205 relative to the first plate member 201 is restricted so as to stop.

FIG. 5 is a plan view showing the back surfaces of the first plate member, the second plate member, and the third plate member before being integrated in the deterioration determination device according to the present embodiment. FIG. 6 is a plan view showing the side surfaces of the first plate member, the second plate member, and the third plate member before being integrated in the deterioration determination device according to the present embodiment. FIG. 7 is another plan view showing side surfaces of the first plate member, the second plate member, and the third plate member before being integrated in the deterioration determination device according to the present embodiment. FIG. 8 is a plan view showing side surfaces of the first plate member, the second plate member, and the third plate member after being integrated in the degradation determination device according to the present embodiment.

The first plate member 201 includes grooves 201C to 201G and holes 201H and 201I.

The groove 201C has a first side of the first plate member 201 (a side on the + X side along the Y axis in FIG. 3) so that the second plate member 203 is pivotally supported with respect to the first plate member 201. ) Along the back surface 201B. The groove 201C includes a surface 201C1 along the thickness direction of the first plate member 201, a surface 201C2 along the back surface 201B, a surface 201C3 intersecting the surfaces 201C1 and 201C2 at one end in the longitudinal direction of the groove 201C, and a longitudinal direction of the groove 201C. Is formed so as to be surrounded by a surface 201C4 intersecting the surfaces 201C1 and 201C2 at the other end. That is, the groove 201 C has a shape in which a square column is hollowed out from the back surface 201 B side of the first plate member 201.

The

grooves

201D and 201E are provided on the surface 201C1 of the groove 201C along the longitudinal direction of the groove 201C so that the second plate member 203 is elastically biased with respect to the first plate member 201.

The hole 201H is formed as a hole that penetrates the surface 201C3 and communicates with the groove 201C so that the second plate member 203 is pivotally supported with respect to the first plate member 201. The hole 201I is formed as a hole that penetrates the surface 201C4 and communicates with the groove 201C so that the second plate member 203 is pivotally supported with respect to the first plate member 201. The holes 201H and 201I are formed so as to be coaxial along the longitudinal direction of the groove 201C.

The groove 201F has a back surface along the third side of the first plate member 201 (the side on the −Y side along the X axis in FIG. 3) so that the third plate member 205 slides relative to the first plate member 201. 201B. The groove 201F is a two-stage continuous groove. The shallow groove is formed with a first width D1, and the deep groove is formed with a second width D2 wider than the first width D1. Furthermore, the width of the shallow groove on the side close to the first side of the groove 201F is formed with the second width D2. As described above, in the groove 201F, by making the shallow groove wider than the deep groove, a leg 205C of the third plate member 205 described later is difficult to be removed from the groove 201F.

The groove 201G has a back surface 201B along the fourth side (the + Y side along the X axis in FIG. 3) of the first plate member 201 so that the third plate member 205 slides with respect to the first plate member 201. Is formed. The groove 201G is a two-stage continuous groove. The shallow groove is formed with a first width D1, and the deep groove is formed with a second width D2 wider than the first width D1. Furthermore, the width of the shallow groove on the side close to the first side in the groove 201G is formed with the second width D2. As described above, in the groove 201G, by making the shallow groove wider than the deep groove, a leg 205D of the third plate member 205 described later is difficult to be removed from the groove 201G.

The first sensor 202 is embedded in a region surrounded by the

grooves

201C, 201F, and 201G in the first plate member 201. In the case of the present embodiment, for example, four first sensors 202 are embedded in the first plate member 201 so as to be aligned in two rows and two columns along the longitudinal direction of the groove 201C and the longitudinal direction of the grooves 201F and 201G. Suppose that it is done.

The second plate member 203 includes a winding shaft 203C, a coil spring 203D, and holes 203E and 203F.

The winding shaft 203C is formed along one side of the second plate member 203 (the side on the −X side along the Y axis in FIG. 3). The winding shaft 203C is a restriction that restricts the rotation range of the second plate member 203 so that the angle between the back surface 201B of the first plate member 201 and the back surface 203B of the second plate member 203 does not exceed 120 degrees. It has a surface 203C1. When the angle between the back surface 201B of the first plate member 201 and the back surface 203B of the second plate member 203 widens to 120 degrees, the regulation surface 203C1 contacts the surface 201C2 of the groove 201C and the elasticity of the second plate member 203 is reached. Regulates rotation in the direction against the force.

The hole 203E is formed at one end of the winding shaft 203C so as to communicate with the hole 201H of the first plate member 201 when the winding shaft 203C of the second plate member 203 is inserted into the groove 201C of the first plate member 201. Is provided.

The hole 203F is connected to the other end of the winding shaft 203C so as to communicate with the hole 201I of the first plate member 201 when the winding shaft 203C of the second plate member 203 is inserted into the groove 201C of the first plate member 201. Is provided.

The second sensor 204 is embedded in a region adjacent to the winding shaft 203 C in the second plate member 203. In the case of this embodiment, for example, the four second sensors 204 are aligned in two rows and two columns along a direction perpendicular to the longitudinal direction of the winding shaft 203C and the longitudinal direction of the winding shaft 203C. It is assumed that it is embedded in the second plate member 203.

The coil spring 203D is wound around the winding shaft 203C. Further, one end of the coil spring 203D is engaged with the groove 201D of the first plate member 201 so that the second plate member 203 is elastically biased with respect to the first plate member 201, and the other end of the coil spring 203D is the first plate. The plate member 201 is locked in the groove 201E.

Then, by inserting the pin 301 into the

holes

201H and 203E and inserting the pin 302 into the holes 201I and 203F, the first plate member 201 and the second plate member 203 are connected and integrated into the second plate member. 203 rotates with the axes of the

holes

201H, 201I, 203E, and 203F as rotation axes in a state where the back surface 203B of the second plate member 203 is elastically biased so as to approach the back surface 201B of the first plate member 201. It will be.

The third plate member 205 includes

legs

205C and 205D and

coil springs

205E and 205F.

The leg 205C is formed to protrude from one end (−Y side) of one side of the third plate member 205 (the + X side along the Y axis in FIG. 3) so as to be fitted into the groove 201F. The leg 205C has a connecting portion 205C1 having a first width D1 and a tip portion 205C2 having a second width D2.

The leg 205D is formed to protrude from one end (+ Y side) of one side (the + X side along the Y axis in FIG. 3) of the third plate member 205 so as to be fitted into the groove 201G. The leg 205D has a connecting portion 205D1 having a first width D1 and a tip portion 205D2 having a second width D2.

The third sensor 206 is embedded in an area adjacent to the

legs

205C and 205D in the third plate member 205. In the case of the present embodiment, for example, four third sensors 206 are embedded in the third plate member 205 so as to be aligned in two rows and two columns along four sides surrounding the third plate member 205. I will do it.

One end of the coil spring 205E is locked to the tip end portion 205C2 and the other end is the second width of the shallow groove in the groove 201F so that the third plate member 205 is elastically biased in a direction approaching the second plate member 203. Locked near the position of D2.

One end of the coil spring 205F is locked to the tip end portion 205D2 and the other end is the second width of the shallow groove in the groove 201G so that the third plate member 205 is elastically biased in a direction approaching the second plate member 203. Locked near the position of D2.

Then, as shown in FIG. 7, the third plate with respect to the first plate member 201 so that the angle between the back surface 201B of the first plate member 201 and the back surface 205B of the third plate member 205 is 120 degrees. With the member 205 tilted, the tip 205C2 is inserted from the position of the second width D2 of the shallow groove in the groove 201F to insert the leg 205C into the groove 201F, and the tip 205D2 is inserted into the second of the shallow groove in the groove 201G. By inserting the leg 205D into the groove 201G from the position of the width D2, the first plate member 201 and the third plate member 205 are connected and integrated, and the third plate member 205 is the third plate member. In a state where the back surface 205B of 205 is elastically biased so as to approach the back surface 203B of the second plate member 203, it slides along the longitudinal direction of the grooves 201F and 201G.

When the third plate member 205 continues to slide against the elastic force so that the back surface 205B of the third plate member 205 is separated from the back surface 203B of the second plate member 203, the

legs

205C and 205D are respectively grooved 201F, The sliding in the direction against the elastic force of the third plate member 205 that contacts the end of 201G is restricted.

=== First to third sensors ===
FIG. 9 is a block diagram illustrating an example of functions of the first to third sensors used in the deterioration determination device according to the present embodiment.

The first sensor 202, the second sensor 204, and the third sensor 206 are configured using, for example, a well-known inductive proximity sensor. Since the first sensor 202, the second sensor 204, and the third sensor 206 have the same configuration, the first sensor 202 will be described.

The first sensor 202 includes a detection coil 401, an oscillation circuit 402, an oscillation state detection circuit 403, and an output circuit 404.

The detection coil 401 is connected to the oscillation circuit 402 to generate a high frequency magnetic field. When the detection coil 401 approaches a metal object to be detected, an induced current flows through the metal object due to an electromagnetic induction phenomenon, and heat loss occurs. Since this heat loss is caused by the oscillation circuit 402, when the heat loss occurs, the oscillation circuit 402 cannot maintain the intended oscillation state, and the oscillation of the oscillation circuit 402 is attenuated or stopped. Become. The oscillation state detection circuit 403 detects that the oscillation circuit 402 is in an attenuated or stopped state. The output circuit 404 outputs a signal indicating that the oscillation of the oscillation circuit 402 has attenuated or stopped according to the detection output of the oscillation state detection circuit 403.

In the case of this embodiment, the metal object corresponds to the electric wire 105A covered with the insulating cover 105B. And in the state which the 1st board member 201 contacted the 1st field of insulating covering 105B, when the thickness of insulating covering 105B is below predetermined thickness, heat loss occurs to electric wire 105A. Values of elements constituting the first sensor 202 are set. The same applies to the second sensor 204 and the third sensor 206.

=== Usage Example of Degradation Determination Device ===
FIG. 10A is a diagram illustrating a state in which the deterioration determination device according to the present embodiment is brought into contact with the lead-in wire. FIG. 10B to FIG. 10D are diagrams showing another state in which the deterioration determination device according to the present embodiment is brought into contact with the lead-in wire. For convenience of explanation, the lead-in line 105 in FIGS. 10A to 10D is shown as a cross section. Since the lead-in wire 105 is formed in a twisted manner, the cross-section of the lead-in wire 105 is triangular (FIG. 10A) and is inclined clockwise or counterclockwise from the position in FIG. 10A depending on the position at which the deterioration of the insulating covering 105B is determined. The triangular shape (FIG. 10B) and the inverted triangular shape (FIG. 10C) may be obtained. Further, in the cross section of the lead-in wire 105, there is a case where the thickness of the insulating covering 105B that covers any of the three electric wires 105A is thinner than the thickness of the other insulating coverings 105B due to aging. Yes (FIG. 10D).

First, a case where the degree of deterioration of the insulating covering 105B is determined at a position where the cross section of the lead-in wire 105 has a triangular shape as shown in FIG. 10A will be described.

The inspector grips the operation rod 207 and moves the deterioration determination device 200 so that the first plate member 201, the second plate member 203, and the third plate member 205 are in a state of surrounding the lead-in wire 105.

When the back surface 201B of the first plate member 201 comes into contact with the upper insulating cover 105B in FIG. 10A, the second plate member 203 rotates against the elastic force, and the back surface 203B of the second plate member 203 is shown in FIG. 10A. The third insulating plate 105 is stable in contact with the upper insulating cover 105B and the lower and right insulating cover 105B. On the other hand, the third plate member 205 slides against the elastic force, and the back surface of the third plate member 205 205B is stabilized in a state where it abuts on the upper insulating cover 105B and the lower and left insulating cover 105B in FIG. 10A. That is, at least one of the four first sensors 202 embedded in the first plate member 201 is opposed to the upper insulating cover 105B in FIG. 10A and is embedded in the second plate member 203. Of the four second sensors 204, at least one second sensor 204 is opposed to the upper insulating cover 105 B and the lower and right insulating cover 105 B in FIG. 10A and is embedded in the third plate member 205. Of the four third sensors 206, at least one third sensor 206 faces the upper insulating cover 105B and the lower and left insulating cover 105B in FIG. 10A. Therefore, it is possible to simultaneously determine whether or not the total thickness of the insulating cover 105B is equal to or less than a predetermined thickness.

The first sensor 202 and the second sensor 204 are such that the thickness of the insulating covering 105B covered by at least one of the three electric wires 105A in the lead-in wire 105 is equal to or less than a predetermined thickness. Information indicating that it is time to replace the existing lead-in wire 105 with a new lead-in wire 105 is obtained from any one of the third sensors 206. For example, when a signal indicating that the oscillation of the oscillation circuit 402 is attenuated or stopped is obtained from the output circuit 404, in other words, a signal indicating that the thickness of the insulating coating 105B is equal to or less than a predetermined thickness from the output circuit 404. When the above is obtained, a warning lamp (not shown) may be turned on for the inspector by a control device (not shown).

Next, a case where the degree of deterioration of the insulating covering 105B is determined at a position where the cross section of the lead-in wire 105 has a triangular shape as shown in FIG. 10B will be described.

Since the lead-in wire 105 is formed by being twisted, the cross-section of the lead-in wire 105 may be inclined clockwise or counterclockwise from the position in FIG. 10A depending on the position at which the deterioration of the insulating covering 105B is determined. Even in such a case, the first plate member 201, the second plate member 203, and the third plate member 205 are connected to the universal joint 208 so that the first plate member 201, the second plate member 203, and the third plate member 205 are the same as in FIG. 10A. Since it contacts the insulating coating 105B, it is possible to simultaneously determine whether or not the total thickness of the insulating coating 105B is equal to or less than a predetermined thickness.

Next, a case where the degree of deterioration of the insulating covering 105B is determined at a position where the cross section of the lead-in wire 105 has an inverted triangular shape as shown in FIG. 10C will be described.

When the back surface 201B of the first plate member 201 comes into contact with the upper and right insulating cover 105B in FIG. 10C and also comes into contact with the upper and left insulating cover 105B, the second plate member 203 resists elastic force. The back surface 203B of the second plate member 203 is stabilized in contact with the upper and right insulating cover 105B in FIG. 10C, while the third plate member 205 slides against the elastic force, The back surface 205B of the third plate member 205 is stable in a state where the back surface 205B is in contact with the upper and left insulating cover 105B in FIG. 10C. That is, at least one first sensor 202 among the four first sensors 202 embedded in the first plate member 201 is opposed to both of the upper insulating cover bodies 105B in FIG. 10C and embedded in the second plate member 203. Among the four second sensors 204, at least one second sensor 204 is opposed to the upper and right insulating cover 105B in FIG. 10C and is four third sensors embedded in the third plate member 205. At least one third sensor 206 out of 206 faces the upper and left insulating coverings 105B in FIG. 10C.

When the thickness of the insulation covering body 105B covered by at least one of the two upper wires 105A of the lead-in wire 105 is equal to or less than a predetermined thickness, the first sensor 202 and the second sensor Information indicating that it is time to replace the existing lead-in wire 105 with a new lead-in wire 105 is obtained from any one of the

sensors

204 and 206.

Next, as shown in FIG. 10D, the cross-section of the lead-in wire 105 is such that the thickness of the upper insulating cover 105B becomes lower and the right insulating cover 105B and the lower and left insulating cover 105B due to aging. A case where the degree of deterioration of the insulating covering 105B is determined at a position where the thickness is thinner than that will be described.

In this case, the second plate member 203 rotates more counterclockwise than the position of FIG. 10A against the elastic force by the thickness of the upper insulating cover 105B, and the second plate The back surface 203B of the member 203 is stable in a state where it is in contact with the upper insulating cover 105B and the lower and right insulating cover 105B. Further, the third plate member 205 slides further toward the second plate member 203 than the position of FIG. 10A against the elastic force by the thickness of the upper insulating cover 105B, The back surface 205B of the three-plate member 205 is stable in a state where it contacts the upper insulating cover 105B and the lower and left insulating cover 105B. That is, at least one of the four first sensors 202 embedded in the first plate member 201 is opposed to the upper insulating cover 105B in FIG. 10D and is embedded in the second plate member 203. Among the four second sensors 204, at least one second sensor 204 is opposed to the upper insulating cover 105 B and the lower and right insulating cover 105 B in FIG. 10D and is embedded in the third plate member 205. Of the four third sensors 206, at least one third sensor 206 faces the upper insulating cover 105B and the lower and left insulating cover 105B in FIG. 10D. Therefore, it is possible to simultaneously determine whether or not the total thickness of the insulating cover 105B is equal to or less than a predetermined thickness.

As described above, according to the deterioration determination device 200, it is possible to reliably determine the degree of deterioration of the insulating covering 105B regardless of the triangular shape in the cross section of the lead-in wire 105.

FIG. 11 is a diagram illustrating a state in which the deterioration determination device according to the present embodiment is brought into contact with a horizontal lead-in wire. FIG. 12 is a diagram illustrating a state in which the deterioration determination device according to the present embodiment is brought into contact with the inclined lead-in wire.

When the lead-in wire 105 is drawn into the house 106, the lead-in wire 105 may be inclined at various angles depending on the location conditions of the house 106.

Since the operation rod 207 is coupled to the first plate member 201 via the universal joint 208, the inspector holds the operation rod 207 vertically with respect to both the horizontal lead wire 105 and the inclined lead wire 105. Only the first plate member 201, the second plate member 203, and the third plate member 205 come into contact with the insulating cover 105 B along the longitudinal direction of the lead-in line 105.

=== Summary ===
As described above, the deterioration determination device 200 according to the present embodiment is a device that determines the degree of deterioration of the insulating coating 105B that covers the electric wire 105A, and is the first that contacts the first region of the insulating coating 105B. The first plate member 201 is provided so as to be integrated with the first plate member 201. The first sensor 202 that detects that the thickness of the first region is equal to or less than a predetermined thickness, and the first plate member 201 And supporting

members

207 and 208 for supporting. Then, by adopting the deterioration determination device 200 according to the present embodiment, it is possible to objectively determine the degree of deterioration of the insulating cover 105B.

Further, the degradation determination device 200 according to the present embodiment is supported in a direction along the longitudinal direction of the lead-in wire 105 in the first plate member 201 and is elastically biased toward the back surface 201B of the first plate member 201, The second plate member 203 abutting on the second region of the insulating cover 105B is provided so as to be integrated with the second plate member 203, and detects that the thickness of the second region is equal to or less than a predetermined thickness. And a second sensor 204. Then, by adopting the deterioration determination device 200 according to the present embodiment, it becomes possible to simultaneously and objectively determine the degree of deterioration of the insulation covering body 105B covered with the two electric wires 105A.

Moreover, the deterioration determination apparatus 200 according to the present embodiment includes a first restricting member (a winding shaft 203C, which restricts a range in which the second plate member 203 rotates against the first plate member 201 against an elastic force. A restriction surface 203C1) is further provided. Then, by employing the deterioration determination device 200 according to the present embodiment, the second plate member 203 can be reliably brought into contact with the second region of the insulating covering 105B.

In addition, the deterioration determination device 200 according to the present embodiment slides in the direction orthogonal to the axial support direction of the second plate member 203 along the back surface 201B of the first plate member 201, and the back surface 203B of the second plate member 203. And a third plate member 205 that is elastically biased toward the third region of the insulating cover 105B, and is provided so as to be integrated with the third plate member 205, and the thickness of the third region is a predetermined value. And a third sensor 206 for detecting that the thickness is equal to or less than the thickness. Then, by adopting the deterioration determination device 200 according to the present embodiment, it becomes possible to simultaneously and objectively determine the degree of deterioration of the insulating cover 105B covered with the three electric wires 105A.

In addition, the deterioration determination device 200 according to the present embodiment includes a second restriction member (grooves 201F, 201G, legs, and the like) that restricts the range in which the third plate member 205 slides against the first plate member 201 against the elastic force. 205C, 205D). Then, by employing the deterioration determination device 200 according to the present embodiment, the third plate member 203 can be reliably brought into contact with the third region of the insulating covering 105B.

In the degradation determination apparatus 200 according to the present embodiment, the first sensor 202 is embedded in the first plate member 201, the second sensor 204 is embedded in the second plate member 203, and the third sensor 206 is the third plate member. It is embedded in 205. Then, by adopting the deterioration determination device 200 according to the present embodiment, the back surfaces 201B, 203B, and 205B become flat without being uneven, so that the first to

third plate members

201, 203, and 205 are made of the insulating cover 105B. The distance between the first to

third sensors

202, 204, and 206 and the surface of the insulating coating 105B is constant, and the determination error can be reduced.

Further, in the degradation determination device 200 according to the present embodiment, the first sensor 201 is an inductive proximity sensor, and an induced current flows through the electric wire 105A when approaching the electric wire 105A, whereby the thickness of the first region is predetermined. The second sensor 203 is an inductive proximity sensor, and the second region has a thickness equal to or smaller than a predetermined thickness due to an induced current flowing through the electric wire 105A when approaching the electric wire 105A. The third sensor 205 is an inductive proximity sensor, and the thickness of the third region is equal to or less than a predetermined thickness due to an induced current flowing through the electric wire 105A when approaching the electric wire 105A. Is detected.

In addition, the deterioration determination device 200 according to the present embodiment further includes a universal joint 208 that is coupled between the first plate member 201 and the operation rod 207. Then, by adopting the deterioration determination device 200 according to the present embodiment, it is possible to objectively determine the degree of deterioration of the insulating covering 105B regardless of whether the lead-in wire 105 is inclined.

In addition, said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

200 Degradation determination device 201 First plate member

201A Front surface

201B Back surface 201C to 201G Groove 202 First sensor 203 Second plate member

203A Front surface

203B Back surface

203C Winding shaft 203D Coil springs 203E and 203F Groove 204 Second sensor 205 Third plate member

205A Front surface

205B Back surface

205C, 205D Leg 206 Third sensor 207 Operation rod 208 Universal joint

Claims

A deterioration determination device that determines the degree of deterioration of an insulation covering that covers an electric wire,
A first plate member that contacts the first region of the insulating covering;
A first sensor provided so as to be integrated with the first plate member, and detecting that the thickness of the first region is equal to or less than a predetermined thickness;
A support member for supporting the first plate member;
A deterioration determination device comprising:
The first plate member is pivotally supported in a direction along the longitudinal direction of the electric wire, and is elastically biased toward a surface of the first plate member facing the insulating cover, and the second of the insulating cover. A second plate member in contact with the region;
A second sensor provided so as to be integrated with the second plate member, and detecting that the thickness of the second region is equal to or less than a predetermined thickness;
The deterioration determination device according to claim 1, further comprising:
The deterioration determination device according to claim 2, further comprising a first restriction member that restricts a range in which the second plate member rotates against an elastic force with respect to the first plate member.
The first plate member slides in a direction orthogonal to the axial support direction of the second plate member along a surface of the second plate member facing the insulating cover, and on the surface of the second plate member facing the insulating cover. A third plate member elastically biased toward and in contact with the third region of the insulating covering;
A third sensor provided so as to be integrated with the third plate member, and detecting that the thickness of the third region is equal to or less than a predetermined thickness;
The deterioration determination apparatus according to claim 2, further comprising:
The deterioration determination device according to claim 4, further comprising a second restriction member that restricts a range in which the third plate member slides against an elastic force with respect to the first plate member.
The first sensor is embedded in the first plate member;
The second sensor is embedded in the second plate member;
The degradation determination device according to any one of claims 1 to 5, wherein the third sensor is embedded in the third plate member.
The first sensor is an inductive proximity sensor, and detects that the thickness of the first region is equal to or less than a predetermined thickness when an induced current flows through the wire when approaching the wire.
The second sensor is an inductive proximity sensor, and detects that the thickness of the second region is equal to or less than a predetermined thickness when an induced current flows through the wire when approaching the wire.
The third sensor is an inductive proximity sensor, and detects that the thickness of the third region is equal to or less than a predetermined thickness when an induced current flows through the electric wire when approaching the electric wire. The deterioration determination device according to claim 6.
The deterioration determination device according to any one of claims 1 to 7, further comprising a universal joint coupled between the first plate member and the support member.
The deterioration determination device according to any one of claims 1 to 8, wherein the electric wire is a lead-in wire drawn into a customer's house from a pole transformer.
The deterioration determination device according to claim 9, wherein the lead-in wire is formed by twisting and twisting three single-phase three-wire electric wires.