JP2019186013A - Detection member, insulator, and detection method - Google Patents

Abstract

To provide a detection member, an insulator and a detection method that are capable of detecting narrowing of a pin of the insulator in advance.SOLUTION: A detection member according to an embodiment is a detection member 10 for detecting narrowing of a pin 8 of an insulator 5, and includes a contact portion in contact with the pin 8, an outer circumferential portion provided in at least a part of a circumference of the pin 8 across the contact portion, and a reflective fluorescence portion 11 provided in at least a part of the outer circumferential portion.SELECTED DRAWING: Figure 3

Description

  One aspect of the present disclosure relates to a detection member, an insulator, and a detection method.

  Patent Document 1 describes a hanging insulator used when supporting a transmission line on a steel tower. The hanging insulator includes an insulator main body having a cylindrical portion and a cap portion, and a cap fitting fixed to the outside of the cylindrical portion of the insulator main body via cement. A plurality of ribs are formed on the lower surface of the cap portion, and an annular recess is provided on the upper surface of the cap portion. A glass pipe filled with a coloring material enters the recess, and the glass pipe is fixed by an adhesive. When a crack occurs in the cap portion, the glass pipe is broken and the coloring material leaks, thereby enabling detection of the crack.

  The lower surface of the cap portion is circular, and a pin fitting for connecting another insulator enters the center of the lower surface of the cap portion. The pin fitting is fixed to the inside of the cylindrical portion of the insulator main body via cement, and the lower portion of the pin fitting protrudes downward from the cap portion. The top of the cap fitting is provided with an engaging recess for engaging the pin fitting of another insulator, and a plurality of insulators are engaged by engaging the pin fitting protruding downward into the engaging recess. Can be connected.

JP-A-1-241718

  By the way, the pins provided for connecting other insulators such as the pin fittings described above are plated for the purpose of rust prevention or the like. Various materials can be used as the plating material. For example, a metal material having a relatively high ionization tendency, such as zinc, may be used. When the pin of the insulator is plated with a metal material having a high ionization tendency, when the pin is fixed to the insulator body with cement, a plating metal having a high ionization tendency is interposed between the pin and the cement.

  A plated metal having a high ionization tendency is likely to cause electrolysis and to cause electrolytic corrosion. That is, if a liquid containing an electrolyte is interposed between the plating metal and the pin and current is generated, the plating metal may be ionized and eluted to cause rusting of the pin (the metal inside the plating metal). Further, in addition to or independent of electrolytic corrosion, elution or rust of the plated metal may be caused by acid rain or sea breeze (containing salt). In the present disclosure, the elution of metal and the generation of rust caused by such electrolytic corrosion or acid rain are referred to as corrosion. Due to the corrosion of the pin itself or the subsequent progress of rust (the metal becomes brittle and partially peels off, etc.), the pin may be reduced in diameter and moved from the insulator body, and the pin may come off from the insulator body. For this reason, it is required to detect in advance the pin diameter reduction.

  A detection member according to one aspect of the present disclosure is a detection member that detects a reduction in diameter of a pin of an insulator, and includes a contact portion that contacts the pin, and at least one around the pin via the contact portion. The outer peripheral part provided in a part and the reflective fluorescence part provided in at least one part of the outer peripheral part are provided.

  In the detection member according to one aspect described above, the outer peripheral portion is supported by the pin of the insulator through the contact portion, and the reflection fluorescent portion is provided on at least a part of the outer peripheral portion. Therefore, by providing a reflective fluorescent part that emits light by reflection or fluorescence corresponding to incident light, the position of the reflective fluorescent part with respect to the pin can be easily grasped. Therefore, since the position of the reflection fluorescent part can be easily grasped even from a distance, it is possible to detect in advance the pin diameter reduction by checking the reflection fluorescent part.

  The reflective fluorescent part may move with respect to the pin as the diameter of the pin is reduced by electrolytic corrosion of the plated metal. Thereby, since the reflection fluorescent part moves with the diameter reduction of the pin, the position of the reflection fluorescent part can be more easily grasped from a distance.

  At least a part of the contact portion may include a metal having an ionization tendency equal to or higher than the ionization tendency of the plating metal of the pin. As a result, when the ionization tendency of the material of the contact portion is greater than the ionization tendency of the plating metal of the pin, the reflective fluorescent portion is made into the pin before the pin is corroded by galvanizing at least part of the contact portion. Can be moved. Therefore, before the pin corrodes, it is possible to detect the pin diameter reduction (including the indication).

  The reflective fluorescent part may include a retroreflecting material. Thereby, the reflection fluorescence (retroreflection) part reflects light along the direction in which the light is incident. Therefore, the reflection fluorescent part performs retroreflection with the irradiation of light from the light source to the reflection fluorescent part, and the light component from the reflection fluorescent part toward the light source can be made stronger. As a result, the position of the reflective fluorescent part can be grasped more easily.

  The above-described detection member is attached to the insulator according to one aspect of the present disclosure. Since this insulator includes the above-described detection member, the same effect as the above-described detection member can be obtained.

  A detection method according to one aspect of the present disclosure is a detection method for detecting a narrowing of a pin of an insulator attached at a high place, and a step of irradiating the insulator with light from a light source at a lower place than at a high place; A step of detecting a reduction in the diameter of the pin by detecting light from the reflected fluorescent part accompanying light irradiation by the reflected fluorescent part moved from the pin due to corrosion of the pin.

  In the detection method according to the one aspect described above, when the pin is reduced in diameter by irradiating light to the reflected fluorescent part moved from the pin as the pin is reduced in diameter, the reflected fluorescent part emits light. However, the reflection fluorescent part can be easily grasped. Accordingly, since the reflected fluorescent part can be easily grasped even from a distance, it is possible to detect in advance the pin diameter reduction by confirming the reflected fluorescent part.

  According to the detection member, the lever, and the detection method of the present disclosure, for example, the diameter reduction of the pin of the lever can be detected in advance.

FIG. 1 is a diagram illustrating an example of an overhead line facility including a detection member and an insulator according to the first embodiment. FIG. 2 is a longitudinal sectional view of the insulator of FIG. FIG. 3A is a diagram schematically showing a state in which the pin of the insulator is normal. FIG.3 (b) is a figure which shows typically the abnormality of the pin of an insulator. FIG. 4A is a diagram schematically illustrating a detection member attached to a pin. FIG. 4B is a plan view of the detection member of FIG. FIG. 4C is a diagram illustrating another example of the contact portion of the detection member. Fig.5 (a) is a side view which shows the reflective fluorescence part of the member for a detection. FIG. 5B is a diagram schematically showing the polarization state of light in the reflective fluorescent part. FIG. 5C is a diagram illustrating an example of a light source and a camera that irradiates light to the reflection fluorescent part. Fig.6 (a) is a cross-sectional view which shows the contact part of the member for a detection which concerns on 2nd Embodiment. FIG. 6B is a plan view showing the outer periphery of the detection member according to the second embodiment. FIG.6 (c) is a longitudinal cross-sectional view which shows the state by which the member for a detection which concerns on 2nd Embodiment was attached to the pin of the insulator. FIG.6 (d) is a side view which shows the state with which the member for a detection which concerns on 2nd Embodiment was attached to the pin of the insulator. Fig.7 (a) is a figure which shows typically the member for a detection which concerns on 3rd Embodiment. FIG. 7B is a cross-sectional view showing the contact portion and the pin of the detection member of FIG. Fig.8 (a) is a figure which shows typically the contact part of the member for a detection which concerns on 4th Embodiment. FIG. 8B is a diagram schematically showing the detection member in FIG. FIG. 9 is a diagram schematically illustrating a contact portion of the detection member according to the fifth embodiment. FIG. 10A is a longitudinal sectional view showing a detection member according to the sixth embodiment. FIG.10 (b) is a cross-sectional view which shows the member for a detection of Fig.10 (a). FIG.10 (c) is a perspective view which shows the member for a detection of Fig.10 (a). Fig.11 (a) is a figure which shows typically the member for a detection when the pin of an insulator is normal. FIG.11 (b) is a figure which shows typically the member for a detection when the pin of an insulator is abnormal.

  Hereinafter, embodiments of a detection member, an insulator, and a detection method according to the present disclosure will be described with reference to the drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and redundant description is omitted as appropriate. In addition, the drawings are partially simplified or exaggerated for easy understanding, and dimensional ratios and the like are not limited to those described in the drawings.

  First, the term “insulator” in the present specification is for insulating an electric wire from a supporting object (such as a steel tower or a utility pole), and typically includes a suspended insulator, a long insulator, a pin insulator, and the like. It is out. The “lion pin” refers to a portion protruding from the insulator, and includes a pin that is connected to another insulator by being inserted into the other insulator. “Abnormality of the pin” indicates a sign or event that the plated metal of the pin is eluted and the pin is corroded or reduced in diameter.

  “Plating metal” refers to a metal material that has been surface-treated on an object to be plated. The “detection member for detecting a decrease in diameter” includes a member for detecting a decrease in diameter and a member for predicting a decrease in diameter. The “contact portion” indicates a portion that is directly or indirectly attached to any portion of the pin. The “outer peripheral portion” indicates a portion that surrounds at least a part of the pin and is supported by the contact portion. The “reflecting fluorescent part” indicates a part that performs at least one of light reflection and fluorescence.

  “Electrical corrosion” means that a metal material with a high ionization tendency dissolves due to the battery action that occurs when an electrolyte solution (pure water or salt water, etc.) is interposed between multiple types of metal materials with different ionization tendency. ing. “Thinning” includes a reduction in the diameter of a round bar or a part of a spherical shape, and also includes a reduction in the width of a bar having a polygonal or oval cross section. “Retroreflective material” refers to a material that reflects light along the incident direction when light is incident. The “high place” is a high place that does not reach from the ground, and includes, for example, an upper portion of a steel tower or utility pole. The “low place” indicates a place that is relatively lower than the high place, and includes, for example, a place that reaches from the ground.

(First embodiment)
FIG. 1 is a diagram illustrating an example of an overhead line facility provided with a detection member and an insulator according to the first embodiment. The overhead wire facility 1 is, for example, a railway overhead wire facility, and includes a plurality of overhead wire pillars 2 provided along a track, an electric wire 3 suspended between the plurality of overhead wire pillars 2, an electric wire 3 and an overhead wire pillar 2. And an insulator 5 that insulates the gap. In the present embodiment, the insulator 5 is irradiated with the light L1 from the light source S located on the ground, and the camera C receives the light L2 from the detection member 10 (see FIG. 3 etc.) provided on the insulator 5, whereby the insulator 5 is detected from a distance of the insulator 5.

  FIG. 2 is a longitudinal sectional view showing the insulator 5 attached to the upper portion of the overhead pole 2. As shown in FIG. 2, the insulator 5 includes, for example, an insulator body 6 that forms a shade, a cap 7 that is positioned on the top of the insulator body 6, and a pin 8 that protrudes from the insulator body 6 to the opposite side of the cap 7. Is provided. The insulator body 6 is made of porcelain, and thereby the electrical insulation, weather resistance, and mechanical strength of the insulator 5 are enhanced.

  The insulator body 6 includes, for example, a disk-shaped shade portion 6a and a protruding portion 6b that projects at the center of the shade portion 6a. The cap portion 6a is provided with a plurality of annular pleats 6c projecting on the opposite side of the projecting portion 6b. Since the plurality of pleats 6c having different diameters are arranged concentrically, the insulation distance with respect to the current passing through the surface of the cap portion 6a is increased. A recess 6d into which the pin 8 is inserted is formed inside the protrusion 6b of the insulator body 6.

  The cap 7 and the pin 8 are made of, for example, iron, and a plated metal M is applied to each of the cap 7 and the pin 8. In FIG. 2, the plated metal M of the pin 8 is illustrated, but the illustration of the plated metal M is omitted except for FIG. 2 for simplification. The plating metal M is, for example, zinc plating. When the material of the plating metal M is zinc, the adhesion to a metal such as iron can be improved to prevent rust such as iron, and the pin 8 having high weather resistance can be obtained. The pin 8 has a small-diameter portion 8a that enters the recess 6d, and a large-diameter portion 8b that extends from the small-diameter portion 8a and is formed with a hole 8c. The shape of the pin 8 is not limited to the shape having the small diameter portion 8a and the large diameter portion 8b in which the hole 8c is formed, and can be changed as appropriate.

  The pin 8 is fixed to the insulator main body 6 via, for example, cement 9 filled in the recess 6d of the insulator main body 6. As described above, since the pin 8 is plated, the plated metal M is interposed between the pin 8 and the cement 9. For example, when the material of the plating metal M is zinc and the material of the pin 8 is iron, the ionization tendency of the plating metal M is higher than the ionization tendency of the pin 8.

  Accordingly, when a liquid containing an electrolyte is interposed between the plating metal M and the pin 8 and a current is generated, the plating metal M is ionized and melted, and the metal inside the plating metal M of the pin 8 is exposed. There is a possibility that the metal will be rusted and the diameter will be reduced. When this diameter reduction occurs, the pin 8 may move from the insulator body 6 and the pin 8 may be detached from the insulator body 6. On the other hand, the insulator 5 according to the present embodiment includes a detection member 10 that detects in advance an abnormality of the pin 8 as described above.

  FIG. 3A and FIG. 3B are diagrams schematically showing the detection member 10 attached to the insulator 5. As shown in FIGS. 3A and 3B, the detection member 10 includes a reflective fluorescent part 11 on the outer surface, and by detecting the movement of the reflective fluorescent part 11 from the insulator body 6, Abnormalities associated with the diameter reduction of the pin 8 are detected. For example, FIG. 3A shows a state in which the pin 8 is normal. When the pin 8 is normal, the reflected fluorescent portion 11 is located inside the insulator 5 (for example, inside the fold 6c of the insulator body 6). It has entered.

  FIG. 3B shows an example of a state where the pin 8 is abnormal. As described above, when a liquid containing an electrolyte is interposed between the pin 8 and the plating metal M to generate a current, the plating metal M is ionized to cause electrolytic corrosion. That is, when the plating metal M causes electrolytic corrosion, the plating metal M is melted. As a result, the pin 8 is rusted to reduce the diameter. The detection member 10 is a member supported by the pin 8, but when the pin 8 is reduced in diameter, the supporting force of the detection member 10 with respect to the pin 8 decreases. Then, the detection member 10 moves as the diameter of the pin 8 is reduced, and the reflected fluorescent portion 11 of the detection member 10 is exposed from the insulator 5. An abnormality of the pin 8 is detected by detecting the exposed reflection fluorescent part 11.

  FIG. 4A is a side view schematically showing the detection member 10 and the pin 8. As shown in FIG. 4A, the detection member 10 is provided on at least a part of the periphery of the pin 8 and the contact portion 12 attached to the pin 8 in addition to the reflection fluorescent portion 11 described above. And an outer peripheral portion 13 supported by the pin 8 via the contact portion 12.

  The contact portion 12 includes, for example, a metal having an ionization tendency equal to or higher than the ionization tendency of the plating metal M of the pin 8. In this case, at least a part of the contact portion 12 can be eroded with the plated metal M or earlier than the plated metal M to move the outer peripheral portion 13 and the reflective fluorescent portion 11 at an early stage. The contact part 12 may contain zinc or aluminum. In the case where the contact portion 12 contains zinc, it is expected that the electrolytic corrosion of the same level as the plated metal M of the pin 8 is expected, so there is an advantage that the electrolytic corrosion of the pin 8 can be detected relatively simultaneously. When the contact part 12 contains aluminum, since aluminum has a higher ionization tendency than zinc, there is an advantage that the electrolytic corrosion of the pin 8 can be detected at a relatively early stage.

  The shape of the contact portion 12 may be, for example, a round bar shape, a square bar shape, or a spherical shape. The contact portion 12 is thinner or thinner in the thickness direction than the portion that does not contact the pin 8 at the portion that contacts the pin 8, that is, for example, the tip of the portion that contacts the pin 8 has a weight shape or a rounded shape. There may be. Thereby, since the area of the contact part 12 which contacts the pin 8 is small, it contributes to the early detection of the electric corrosion of the pin 8 or the contact part 12.

  As shown in FIG. 4B, the contact portion 12 may be disposed at a plurality of locations along the circumferential direction on the outer peripheral surface 8 d of the pin 8, for example. The number of contact portions 12 is, for example, 2 or more and 100 or less, more preferably 3 or 4. As an example, the contact portions 12 may be disposed at three locations along the circumferential direction on the outer peripheral surface 8d, and the contact portions 12 may be disposed at substantially equal intervals with a phase angle of 120 degrees. In this case, the support by the contact part 12 can be further stabilized.

  Further, as shown in FIG. 4C, the contact portion 12 may have a weakened portion 12a that is weaker than other portions. The weak part 12a has shown the site | part made weaker than the surrounding site | part. The fragile portion 12a is a portion that is weaker and weaker than the surrounding portion and has a shape or material that can be easily broken, for example, a portion that is thinner than the surrounding portion. The position, shape, and number of the weak parts 12a in the contact part 12 can be changed as appropriate. Further, the fragile portion 12a can be omitted.

  The weak part 12a may be comprised with the brittle material different from the surrounding material. For example, the weak part 12a may be comprised with the material which has an ionization tendency higher than the ionization tendency of the surrounding material. In this case, the fragile portion 12a can be made fragile earlier than the pin 8. Moreover, the contact part 12 may have the weak part 12a in the edge part (end part of the radial direction inner side of the outer peripheral part 13) by the side of the pin 8, In this case, with the diameter reduction of the pin 8, The weak part 12a can be weakened directly. By having the weakened part 12a to be weakened in this way, the detection member 10 can be moved from the pin 8 at an early stage.

  The outer peripheral portion 13 is a portion provided at least at a part of the periphery of the pin 8, and is disposed so as to surround the outer peripheral surface 8 d of the pin 8, for example. The outer peripheral portion 13 is a portion that is supported by the pin 8 via the contact portion 12. The outer peripheral part 13 moves with respect to the pin 8 with the diameter reduction by the electrolytic corrosion of the plating metal M of the pin 8, for example. As an example, the outer peripheral portion 13 moves downward as the pin 8 becomes thinner. In the present specification, “downward” includes not only vertically downward but also diagonally downward such as a direction facing slightly downward. Further, the direction in which the outer peripheral portion moves with respect to the pin is not limited to the lower side, and may be, for example, the upper side or the horizontal direction (horizontal direction).

  In other words, the position of the outer peripheral portion 13 when the abnormality of the pin 8 is detected may be different from the position of the outer peripheral portion 13 when the pin 8 is normal. For example, the position of the outer peripheral portion 13 when detecting the abnormality of the pin 8 May be lower than the position of the outer peripheral portion 13 when the pin 8 is normal. In this case, when the abnormality of the pin 8 is detected, the reflected fluorescent part 11 is more reliably exposed, so that the abnormality of the pin 8 can be detected more easily.

  Although the material of the outer peripheral part 13 is resin, for example, it can change suitably. The outer peripheral portion 13 may be made of plastic. As an example, the shape of the outer peripheral portion 13 may be a truncated conical cylinder shape (a cap shape) whose diameter increases toward the tip side (downward) of the pin 8. However, the shape of the outer peripheral portion 13 can be changed as appropriate, and may be, for example, a cylindrical shape or a truncated conical cylinder shape whose diameter decreases toward the tip side (downward) of the pin 8. That is, the inclination angle of the outer peripheral portion 13 with respect to the longitudinal direction (vertical direction) of the pin 8 can be appropriately changed.

  FIGS. 5A, 5B, and 5C are diagrams for explaining the reflective fluorescent portion 11. FIG. As shown in FIG. 5A and FIG. 5B, the reflection fluorescent part 11 is provided on at least a part of the outer peripheral part 13. For example, the reflection fluorescent part 11 is attached to the outer surface of the outer peripheral part 13. It is attached. However, the arrangement means of the reflection fluorescent part 11 with respect to the outer peripheral part 13 is not limited to the pasting, and may be, for example, painting or the like, and can be appropriately changed.

  At least a part of the reflected fluorescent part 11 is exposed from the outer peripheral part 13. As described above, the reflection fluorescent portion 11 is hidden inside the insulator 5 when the pin 8 is normal, and moves with the movement of the outer peripheral portion 13 accompanying the diameter reduction of the pin 8 and is exposed to the outside of the insulator 5. To do. For example, the reflective fluorescent part 11 includes a retroreflecting material. Therefore, the reflection fluorescent part 11 reflects light along the direction in which light is incident, that is, reflects light in the direction opposite to the direction in which light is incident. As an example, the reflective fluorescent part 11 may be a prismatic retroreflective material, that is, a retroreflective sheet having a cube corner element.

  As shown in FIG. 5B and FIG. 5C, when the reflective fluorescent part 11 is a prism-type retroreflective material, for example, a polarization filter F1 that transmits light L1 having a polarization direction of the first direction D1. When the light L1 is radiated from the light source S to the reflective fluorescent part 11, the reflective fluorescent part 11 reflects the light L2 whose polarization direction is the second direction D2 intersecting the first direction D1. The camera C receives the light L2 from the reflected fluorescent part 11 through the polarization filter F2 that transmits the light L2 having the polarization direction D2 in the second direction D2. Thereby, since the influence of light other than the light L2 with respect to the camera C can be reduced, the camera C can receive the light L2 more reliably. As an example, the first direction D1 is a vertical direction (vertical direction) with respect to the light L1, and the second direction D2 is a horizontal direction (horizontal direction) orthogonal to the first direction D1.

  The reflective fluorescent part 11 may be other than a retroreflecting material, and may include, for example, a material coated with a fluorescent agent that converts ultraviolet light into visible light. In this case, the reflected fluorescent part 11 does not emit light even when irradiated with radiation other than ultraviolet rays, and emits light when irradiated with ultraviolet rays.

  Next, a detection method according to this embodiment will be described. In the following, for example, as shown in FIG. 1, an example will be described in which an abnormality of the pin 8 provided on the insulator 5 that is attached to a high place that is not reachable by hand and is difficult to see visually is detected. As an example, the insulator 5 is provided on the upper side of the overhead pole 2 of the railway overhead line facility 1. For example, the abnormality of the pin 8 is detected when the worker P holds the camera C with the light source S by hand.

  First, light L1 is irradiated from the light source S to the insulator 5 (step of irradiating light). At this time, as shown in FIGS. 3 (a) and 3 (b), when the pin 8 is normal, the reflected fluorescent part 11 is hidden inside the insulator body 6, and therefore the light L1 is emitted. However, no reflected light can be obtained. On the other hand, when the pin 8 is abnormal, the reflected fluorescent part 11 is moved from the insulator body 6 and the reflected fluorescent part 11 is exposed, so that the reflected fluorescent part 11 is irradiated with the light L1. Emits light L2.

  Therefore, by irradiating the insulator 5 with the light L1 and confirming the position of the reflection fluorescent part 11 from the presence or absence of the light L2, it is possible to determine that the pin 8 is normal when the light L2 cannot be obtained. When the light L2 is obtained, it can be determined that the pin 8 is abnormal. In this way, the light L2 is incident on the camera C and the camera C detects the light L2, thereby detecting an abnormality of the pin 8 (step of detecting an abnormality of the pin). When an abnormality of the pin 8 occurs, the light L2 reliably enters the camera C even if the light L1 is irradiated from a distance, so that the abnormality of the pin 8 can be detected reliably and easily.

  Next, the effect of the detection member 10 and the detection method according to the present embodiment will be described in detail.

  In the detection member 10 according to the present embodiment, the outer peripheral portion 13 is supported by the pin 8 of the insulator 5 via the contact portion 12, and the reflected fluorescent portion 11 is provided at least at a part of the outer peripheral portion 13. Therefore, by providing the reflection fluorescent part 11 that emits the light L2 by reflection or fluorescence corresponding to the light L1 that is incident light, the position of the reflection fluorescent part 11 with respect to the pin 8 can be easily grasped. Therefore, since the position of the reflection fluorescent part 11 can be easily grasped even from a distance, the diameter reduction of the pin 8 can be detected in advance by checking the reflection fluorescent part 11.

  The reflective fluorescent part 11 may move with respect to the pin 8 as the diameter of the plated metal M of the pin 8 is reduced by electrolytic corrosion. Thereby, since the reflection fluorescent part 11 moves with the abnormality of the diameter reduction of the pin 8, the position of the reflection fluorescent part 11 can be more easily grasped from a distance.

  At least a part of the contact portion 12 may include a metal (for example, zinc or aluminum) having an ionization tendency equal to or higher than the ionization tendency of the plating metal M of the pin 8. Thereby, when the ionization tendency of the contact part 12 is equal to or higher than the ionization tendency of the plating metal M of the pin 8, the outer peripheral part 13 before the pin 8 is corroded by galvanically eroding at least a part of the contact part 12. The reflective fluorescent part 11 can be moved with respect to the pin 8. Therefore, it is possible to detect the diameter reduction of the pin 8 before the pin 8 corrodes.

  The reflective fluorescent part 11 may include a retroreflecting material. Thereby, the reflection fluorescent part 11 (recursive reflection part) reflects the light L2 along the direction in which the light L1 is incident. Therefore, the reflected fluorescent part 11 performs retroreflection with the irradiation of the light L1 from the light source S to the reflected fluorescent part 11, and the component of the light L2 from the reflected fluorescent part 11 toward the light source S can be made stronger. As a result, the position of the reflection fluorescent part 11 can be grasped more easily.

  The above-described detection member 10 is attached to the insulator 5 according to the present embodiment. That is, since the insulator 5 includes the detection member 10, the same effect as that of the detection member 10 can be obtained.

  In the detection method according to the present embodiment, the light L1 is irradiated to the reflected fluorescent part 11 moved from the pin 8 as the pin 8 is reduced in diameter, and the reflected fluorescent part 11 emits the light L2, so that the pin 8 is thinned. When the diameter is increased, the reflected fluorescent portion 11 can be easily grasped even from a distance. Therefore, since the reflected fluorescent part 11 can be easily grasped even from a distance, the diameter reduction of the pin 8 can be detected in advance by checking the reflected fluorescent part 11.

(Second Embodiment)
Next, the detection member 20 according to the second embodiment will be described with reference to FIGS. 6 (a) to 6 (d). As shown in FIG. 6A to FIG. 6D, the detection member 20 is the first in that it includes a contact portion 22 and an outer peripheral portion 23 different from the contact portion 12 and the outer peripheral portion 13 described above. It is different from the embodiment. In the following description, the description overlapping with the first embodiment is omitted as appropriate.

  For example, the contact portion 22 includes two divided members 22a divided from each other, and the outer peripheral portion 23 includes two divided members 23a divided from each other. At least one of the divided member 22a and the divided member 23a may be, for example, a half member in a semicircular shape. In this case, the work of assembling the contact portion 22 or the outer peripheral portion 23 by joining the divided members 22a and 23a can be easily performed. As an example, the shape of the contact portion 22 obtained by combining the two divided members 22 a and the shape of the outer peripheral portion 23 obtained by combining the two divided members 23 a are along the outer peripheral surface 8 d of the pin 8. An annular shape (cylindrical shape) extending. However, the shapes of the contact portion 22 and the outer peripheral portion 23 can be changed as appropriate.

  The material of the contact portion 22 and the material of the outer peripheral portion 23 may be resin or metal, and can be changed as appropriate. However, when the contact portion 22 (more specifically, the set screw N3 that contacts the pin 8) includes a material that has an ionization tendency higher than the ionization tendency of the plating metal M of the pin 8, the corrosion of the pin 8 occurs. Since the contact portion 22 can be eroded quickly, the outer peripheral portion 23 and the reflected fluorescent portion 11 can be moved at an early stage to detect the abnormality of the pin 8 earlier.

  A method for attaching the detection member 20 to the pin 8 will be described. First, as shown in FIG. 6 (a), the two divided members 22a are disposed so as to surround the outer peripheral surface 8d of the pin 8, and the two divided members 22a are joined by screws N1 and nuts N2 to come into contact with each other. The portion 22 is shifted to a predetermined position of the pin 8 (small diameter portion 8a), and the set screw N3 is tightened to fix the contact portion 22 to the pin 8. Next, as shown in FIGS. 6 (b), 6 (c) and 6 (d), each of the two divided members 23a is attached to the outside of each divided member 22a, and on the outer periphery of each divided member 23a. For example, the reflection fluorescent part 11 which is a retroreflective sheet is attached, and the attachment of the detection member 20 is completed.

  As described above, in the detection member 20 according to the second embodiment, the outer peripheral portion 23 is supported by the pin 8 of the insulator 5 via the contact portion 22, and the reflected fluorescent portion 11 is provided on at least a part of the outer peripheral portion 23. It is done. Therefore, by providing the reflective fluorescent part 11 that emits the light L2, the position of the reflective fluorescent part 11 with respect to the pin 8 can be easily grasped. Specifically, since the outer peripheral portion 23 and the reflective fluorescent portion 11 move with respect to the pin 8 as the diameter of the plated metal M of the pin 8 is reduced by electric corrosion, the position of the reflective fluorescent portion 11 is grasped from a distance. It can be made easier. Therefore, the same effect as the detection member 10 according to the first embodiment can be obtained.

(Third embodiment)
Next, the detection member 30 according to the third embodiment will be described with reference to FIG. In 3rd Embodiment, the structure of the contact part 32 differs from each embodiment mentioned above. The contact portion 32 includes an attachment member 32a attached so as to be in contact with the outer peripheral surface 8d of the pin 8, and a tightening member 32b for fastening the attachment member 32a. For example, a plurality of attachment members 32a are provided, and the tightening member 32b tightens the plurality of attachment members 32a together. As an example, the fastening member 32b tightens the pair of attachment members 32a in a state where the pair of attachment members 32a sandwich the pin 8.

  The material of the attachment member 32a and the material of the fastening member 32b may be resin or metal, and can be changed as appropriate. However, when the attachment member 32a (particularly, the portion in contact with the pin 8) includes a material having an ionization tendency that is higher than the plating metal M of the pin 8, the outer peripheral portion 13 and the reflective fluorescent portion 11 are moved earlier. be able to. As a result, it is possible to detect the abnormality of the pin 8 earlier. Each mounting member 32a has, for example, a mountain-shaped portion 32c that contacts the outer peripheral surface 8d of the pin 8, and a pair of flat plate portions 32d that extend radially outward of the pin 8 from both ends of the mountain-shaped portion 32c.

  The tightening member 32b includes, for example, a screw 32e and a nut (not shown) that is screwed into the screw 32e. Each flat plate portion 32d is formed with a screw hole 32f through which the screw 32e is inserted. The two attachment members 32a are joined by screwing the screws 32e inserted into the screw holes 32f of the two attachment members 32a into the nuts. In addition, the outer peripheral part 13 and the reflective fluorescence part 11 are provided in the outer side of the contact part 32 similarly to each embodiment mentioned above.

  As described above, in the detection member 30 according to the third embodiment, the outer peripheral portion 13 is supported by the pin 8 of the insulator 5 via the contact portion 32, and the reflected fluorescent portion 11 is provided on at least a part of the outer peripheral portion 13. It is done. Therefore, by providing the reflective fluorescent part 11 that emits the light L2, the position of the reflective fluorescent part 11 with respect to the pin 8 can be easily grasped. Therefore, the same effect as each embodiment mentioned above can be obtained.

(Fourth embodiment)
Next, the detection member 40 according to the fourth embodiment will be described with reference to FIG. In 4th Embodiment, the structure of the contact part 42 differs from each embodiment mentioned above. The contact portion 42 includes a plate-like member 42a that is in contact with the outer peripheral surface 8d of the pin 8, an attachment member 42b that is attached to the opposite side of the plate-like member 42a from the pin 8 (the radially outer side of the pin 8), and an attachment member. And a tightening member 42c for tightening 42b.

  For example, the contact portion 42 includes a plurality of plate-like members 42a, a plurality of attachment members 42b, and a plurality of tightening members 42c. Each plate-like member 42a is arranged so as to surround the outer peripheral surface 8d of the pin 8, and each attachment member 42b is arranged outside each plate-like member 42a. As an example, the plate-shaped member 42a is sandwiched between the mounting member 42b and the pin 8, and the pair of mounting members 42b sandwich the pair of plate-shaped member 42a and the pin 8 and the fastening member 42c is mounted in a pair. The member 42b is tightened.

  Each attachment member 42b has, for example, a curved surface portion 42d that contacts the outer peripheral surface of the plate-shaped member 42a, and a pair of flat plate portions 42e that extend radially outward of the pin 8 from both ends of the curved surface portion 42d. The tightening member 42c includes, for example, a screw 42f and a nut (not shown) that is screwed into the screw 42f. Each flat plate portion 42e is formed with a screw hole 42g through which the screw 42f is inserted. The configuration of the screw 42f and the screw hole 42g may be the same as the configuration of the screw 32e and the screw hole 32f described above. Moreover, the outer peripheral part 13 and the reflective fluorescence part 11 are provided in the outer side of the contact part 42 similarly to each embodiment mentioned above.

  The plate-like member 42a includes, for example, a material having an ionization tendency that is higher than the plating metal M of the pins 8. In this case, since the outer peripheral portion 13 and the reflection fluorescent portion 11 can be moved earlier by electroeroding the plate-like member 42a earlier than the pin 8, it is possible to detect the abnormality of the pin 8 earlier. Moreover, although the material of the attachment member 42b and the fastening member 42c is resin or a metal, for example, it is not specifically limited.

  As described above, in the detection member 40 according to the fourth embodiment, the outer peripheral portion 13 is supported by the pin 8 of the insulator 5 via the abutting portion 42, and the reflected fluorescent portion 11 is provided on at least a part of the outer peripheral portion 13. The position of the reflection fluorescent part 11 with respect to the pin 8 can be easily grasped. Therefore, the same effect as each embodiment mentioned above can be obtained.

(Fifth embodiment)
Next, the detection member 50 according to the fifth embodiment will be described with reference to FIG. The detection member 50 according to the fifth embodiment includes an abutting portion 52, a reflective fluorescent portion 11, and an outer peripheral portion 13, and the configuration of the abutting portion 52 is different from each of the embodiments described above. On the other hand, since the reflection fluorescent part 11 and the outer peripheral part 13 are the same as the outer peripheral part 13 and the reflective fluorescent part 11 of each embodiment described above, the outer peripheral part 13 and the reflective fluorescent part 11 are not shown in FIG. .

  The contact portion 52 includes an attachment member 52 a attached to the outer peripheral surface 8 d of the pin 8, and an adhesive 52 b that fixes the attachment member 52 a to the pin 8. For example, the contact portion 52 includes a plurality of attachment members 52a, and each attachment member 52a is bonded to the outer peripheral surface 8d of the pin 8 with an adhesive 52b. In this way, since the adhesive 52b adheres and fixes each mounting member 52a to the outer peripheral surface 8d of the pin 8, in the fifth embodiment, a fastening member such as a screw is not necessary. Further, by causing the adhesive 52b to contain a resin (polyamide, polyacetal, or the like) that is decomposed by a substance (for example, zinc chloride) generated when the plating metal M is eluted by acid rain or salt water, the plating metal M of the pin 8 is formed. It is also possible to promote a decrease in the adhesive strength of the adhesive 52b when it is eluted.

  Each attachment member 52a has a curved surface portion 52c extending along the outer peripheral surface 8d of the pin 8 and a pair of flat plate portions 52d extending outward in the radial direction of the pin 8 from both ends of the curved surface portion 52c, like the attachment member 42b described above. And have. An adhesive 52e is interposed between a pair of flat plate portions 52d arranged in a direction in which the two mounting members 52a face each other, and the two mounting members 52a are bonded and fixed to each other by the adhesive 52e.

  As described above, in the detection member 50 according to the fifth embodiment, the outer peripheral portion 13 is supported by the pin 8 via the contact portion 52 and the reflected fluorescent portion 11 is provided on at least a part of the outer peripheral portion 13. The position of the reflection fluorescent part 11 with respect to the pin 8 can be easily grasped. Therefore, the same effects as those of the above-described embodiments can be obtained. Furthermore, since the detection member 50 does not require a fastening member, the number of parts can be reduced and attachment to the pin 8 can be easily performed.

(Sixth embodiment)
In the first to fifth embodiments, for example, as shown in FIG. 5A, the reflective fluorescent part 11 is arranged outside the outer peripheral part 13 (when the pin 8 is inside). However, it is also possible to arrange the reflective fluorescent part 11 inside the outer peripheral part 13. In this case, when the pin 8 is reduced in diameter, at least a part of the reflected fluorescent part 11 with respect to the outer peripheral part 13 is exposed so that at least a part of the reflected fluorescent part 11 is exposed from the inside of the outer peripheral part 13 to the outside. Moving. For example, the contact portion 12 and the reflection fluorescent portion 11 are in contact with each other, and as the contact portion 12 partially elutes, the contact fluorescent portion 11 is partially moved due to a partial loss of the contact portion. May be. The reflective fluorescent part 11 is a liquid or gel fluid and may be carried or stored by the contact part 12.

  For example, as shown in FIGS. 10A, 10B, and 10C, the detection member 60 includes a contact portion 62 that contacts the outer peripheral surface 8d of the pin 8, and a contact portion. A hollow outer peripheral portion 63 positioned radially outside the pin 8 with respect to 62, a reflective fluorescent portion 61 that is a liquid or gel-like fluid accommodated in the outer peripheral portion 63, the outer peripheral portion 63 and the outer peripheral surface 8d. And an adhesive 64 provided therebetween.

  The reflective fluorescent part 61 is, for example, a reflective fluorescent paint. For example, the outer peripheral portion 63 has a cylindrical shape surrounding the pin 8, and has a gap K between the outer peripheral portion 63 and the pin 8. As an example, the outer peripheral part 63 is cylindrical. The gap K is formed between the inner peripheral surface 63 a of the outer peripheral portion 63 and the outer peripheral surface 8 d of the pin 8. The contact portion 62 protrudes radially inward of the pin 8 from the inner peripheral surface 63 a of the outer peripheral portion 63, and the tip end portion 62 a of the contact portion 62 is in contact with the outer peripheral surface 8 d of the pin 8. For example, a plurality of contact portions 62 may protrude from the inner peripheral surface 63 a, and the plurality of contact portions 62 may be arranged at equal intervals in the circumferential direction of the pin 8.

  As an example, the contact portions 62 may be disposed at two locations along the circumferential direction on the outer peripheral surface 8d, and the contact portions 62 may be disposed at substantially equal intervals with a phase angle of 180 degrees. . The adhesive 64 is provided to adhere and fix the outer peripheral portion 63 to the pin 8 and is filled in, for example, a portion of the gap K where the contact portion 62 is not provided. As an example, the adhesive 64 may be filled in each of a plurality of contact portions 62 arranged in the circumferential direction.

  The outer peripheral portion 63 includes, for example, a plurality of divided members 63 b that are divided from each other, and the plurality of divided members 63 b may be joined to each other via the adhesive 64. As an example, the split member 63b may be a half member formed in a semi-cylindrical shape. In this case, the operation | work which joins the two division members 63b and assembles the outer peripheral part 63 can be performed easily. However, the shape and material of the outer peripheral part 63 can be changed as appropriate.

  At least a part of the contact portion 62 (for example, the front end portion 62a) may include a metal having an ionization tendency equal to or higher than the ionization tendency of the plating metal M of the pin 8. In this case, the reflective fluorescent part 61 can be moved at an early stage by causing the contact part 62 to galvanize earlier than the pin 8. Further, at least a part of the contact portion 62 (for example, the tip portion 62a) may include a resin (polyamide, polyacetal, or the like) that is decomposed by a substance (for example, zinc chloride) generated when the plating metal M is eluted. . Thereby, the reflection fluorescence part 61 can be moved at an early stage.

  Specifically, as shown in FIGS. 11A and 11B, when a hole or a gap is formed in the contact part 62 as the contact part 62 is eluted, the reflected fluorescence is emitted from the hole or the gap. The part 61 moves in the form of leakage. That is, the contact part 62 and the outer peripheral part 63 are formed in a case shape that accommodates the liquid or gel-like reflection fluorescent part 61, and the reflected fluorescent part 61 flows out as the contact part 62 is eluted. 61 is exposed to the outside. As described above, in the sixth embodiment, since the reflected fluorescent part 61 can be moved earlier by eroding the contact part 62 earlier than the pin 8, it is possible to detect an abnormality of the pin 8 earlier. . Therefore, the same effects as those of the above-described embodiments can be obtained.

  As mentioned above, although each embodiment of this indication was described, this indication is not limited to each embodiment mentioned above. The present disclosure can also be applied to insulators attached to other than the overhead pillars of the railway overhead line facility, such as insulators attached to the upper part of the steel tower, and can be applied to various insulators. For example, a cylindrical zinc sleeve may be provided around the pin, and the detection member may be attached via the zinc sleeve. In this case, the contact portion of the detection member may be attached to the pin via the zinc sleeve. As described above, the configuration of the insulator can be appropriately changed, and a corrosion-resistant member such as a zinc sleeve and a detection member can be used in combination. Further, the shape, size, material, number, and arrangement of each part of the detection member are not limited to the above-described embodiments, and can be changed as appropriate.

(Example)
Next, examples of the detection member and the insulator will be described. The present disclosure is not limited to the following examples. As shown in FIGS. 6A to 6D, the insulator of the embodiment includes a pin 8, and the detection member of the embodiment includes a reflective fluorescent portion 11, a contact portion 22, and an outer peripheral portion 23. The pin 8 has a round bar-like small diameter portion 8a and an enlarged diameter portion 8b to which a detection member is attached, and the diameter of the small diameter portion 8a is 19 mm. The contact portion 22 and the outer peripheral portion 23 are both in an annular shape. The diameter of the contact portion 22 is 35 mm, and the diameter of the outer peripheral portion 23 is 40 mm. Moreover, the height (thickness) of the contact part 22 is 8 mm, and the height (thickness) of the outer peripheral part 23 is 12 mm. The reflective fluorescent part 11 is a retroreflective sheet.

  In the insulator and the detection member of the embodiment, when the pin 8 is galvanized, the outer peripheral portion 23 and the reflected fluorescent portion 11 are moved downward from the pin 8 and the reflected fluorescent portion 11 is exposed from the insulator 5, so that the exposed reflected fluorescent portion is exposed. It was found that the abnormality of the pin 8 can be detected by detecting 11.

2 ... overhead wire pole, 5 ... insulator, 8 ... pin, 10, 20, 30, 40, 50 ... detection member, 11, 61 ... reflection fluorescent part, 12, 22, 32, 42, 52, 62 ... contact part , 13, 63 ... outer peripheral part, L1, L2 ... light, S ... light source.

Claims (6)

A detection member for detecting the thinning of the pin of the insulator,
A contact portion that contacts the pin;
An outer periphery provided on at least a part of the periphery of the pin via the contact portion;
A reflective fluorescent part provided on at least a part of the outer peripheral part;
A detection member comprising: The reflection fluorescent part moves with respect to the pin as the diameter of the pin is reduced by electrolytic corrosion of the plated metal.
The detection member according to claim 1. At least a part of the contact portion includes a metal having an ionization tendency equal to or higher than the ionization tendency of the plating metal of the pin.
The detection member according to claim 1 or 2. The reflective fluorescent part includes a retroreflecting material,
The member for detection as described in any one of Claims 1-3.   The insulator with which the member for a detection as described in any one of Claims 1-4 was attached. A detection method for detecting a narrowing of a pin of an insulator attached to a high place,
Irradiating the insulator with light from a light source lower than the high place;
Detecting the thinning of the pin by detecting light from the reflected fluorescent part accompanying irradiation of the light by the reflected fluorescent part moved from the pin with corrosion of the pin;
A detection method comprising:

Images