JP2020005347A - Fitting structure for polymer insulator - Google Patents

Abstract

To provide a fitting structure for a polymer insulator which solves the program that there is no durability in a conventional porcelain insulator, and has practicability.SOLUTION: A fitting structure comprises: a fitting tool 3 including a rotation mechanical 12 which makes a wire body such as a ground wire or a power line rotatable in at least one direction with respect to a fitted body 2 such as a steel tower, for supporting in a spread state or a suspended state; and a polymer insulator 6 in which a large diameter part 14 consisting of an insulative polymer is provided continuously around a core material 13 consisting of an insulative synthetic resin material. The fitting tool 3 consists of an integrated object 9 including an end metal fitting 7 in which an end 6a of the polymer insulator 6 is accommodated and fixed, and an external functional material fitting part 8, and integrating the end metal fitting 7 and the external functional material fitting part 8.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an insulator mounting structure, and more particularly to a polymer insulator mounting structure using an insulating polymer.

An insulator is an instrument used to insulate between an overhead power transmission line (hereinafter simply referred to as an electric wire) and a support such as a steel tower. In particular, a suspension insulator is often used by arranging a plurality (sometimes several tens) of cap-shaped insulators.
FIG. 7 is a diagram showing an example of a porcelain suspension insulator that has been disclosed by the present applicant in Patent Document 1 below.
The porcelain suspension insulator 51 includes a mounting member 53 for suspending and supporting a ground wire or an electric wire to a body 52 to be mounted, an upper horn mounting bracket 58 as a mounting portion of an arc horn 67, and six porcelain insulator series. 60, a lower horn mounting bracket 62, and a hanging clamp 64.

The attachment 53 is, for example, a rotation mechanism 70 in a first direction that enables rotation substantially parallel to the line direction of the ground wire or the electric wire, and a direction substantially orthogonal to the first direction, that is, substantially orthogonal to the line direction. A second-direction rotating mechanism 72 is provided. However, which of the first direction and the second direction depends on the configuration of the target insulator.
The porcelain suspension insulator 51 fixes the mounting tool 53 to a mounting body 52 such as a steel tower, and holds a ground wire (not shown) with a clamp body of a suspension clamp 64 and a holding metal. Is generally supported by the attached body 52.

Patent No. 5852905

In the above-described configuration, the connecting portion in the porcelain insulator series 60 has a large diameter in a state where the metal ball pin portion 78 is fitted in the porcelain large diameter portion upper portion 79 in the power system as shown in FIG. Often, a ball-and-socket type that allows the part to swing is employed.
However, it has been reported in various places that the ball-and-socket type insulator does not have much effect of cleaning the ball pin portion with rainwater during periodic inspection and maintenance, and that the metal ball pin portion 78 is partially corroded. I have. In particular, it occurs frequently in suspension devices.
When this corrosion is provided on an isolated island or a coastline, there is also a problem that the deterioration of rust is promoted by salt of seawater. At present, the durability is improved by galvanizing the ball pin portion 78, but the adverse effect of salt is great, and the one that can be stably used for about 50 years in flatland and mountainous areas is usually used in sea. It is an issue that the durability can be maintained only for about 10 years in the vicinity.

In the periodic inspection, the state of the ball pin portion 78 is checked using a live-line mirror or the like, which requires considerable labor and labor in maintenance.
Further, the metal ball pin portion 78 remains exposed to rust deterioration due to moisture adhesion not only in salt damage but also in an area with a large amount of rain or an environment with a large amount of snowfall. Under such circumstances, it is desired to provide a new insulator that can maintain insulator performance for a long period of time and can reduce the burden on the operator during inspection and replacement.
An object of the present invention is to provide a mounting structure for a polymer insulator that can solve the above-mentioned respective problems of the prior art.
In addition, problems of the invention other than those described above, means for solving the problems, and effects thereof will be described in detail in the following specification.

The mounting structure of the polymer insulator according to the present invention is a mounting applied to a mounting tool for supporting a wire such as a ground wire or a power line in a stretched state or a suspended state with respect to a mounted body such as a steel tower. Structure,
The mounting fixture is a polymer insulator provided with a large diameter portion made of an insulating polymer around a core material made of an insulating synthetic resin material, and an end fitting fixed by housing the end of the polymer insulator. A rotation mechanism that enables the polymer insulator to rotate in at least a first direction with respect to the attached body, an external function material attachment portion that mounts an external function material attached to the polymer insulator, and a connection to the rotation mechanism Having an integrated object,
The integrated product is obtained by integrating the end fitting and the external functional material mounting portion.

With this configuration, the polymer is provided with a large diameter portion made of an insulating polymer around a core material made of an insulating synthetic resin material. Even if the end fitting and the mounting part of the external functional material such as a horn are integrated, it is resistant to some shaking due to the flexibility and flexibility of the core material, and is resistant to salt damage and rust. Since it is a member having a certain strength, it is possible to provide an insulator mounting structure that can be used stably for a long period of time even in a severe environment without being damaged.
In addition, since the integrated member is used, the number of metal fittings can be reduced to simplify the apparatus, and the cost can be reduced. Furthermore, when a polymer insulator is used, the overall length tends to be longer.However, even if a polymer insulator is used, the overall length to obtain various withstand voltages equivalent to those of porcelain suspension insulators currently used is the same as that of conventional products. This has the advantage of being able to provide a highly practical product that can be made as short as possible.

In another embodiment according to the present invention, the end fitting includes a recess accommodating portion, the end of the polymer insulator is inserted into the recess accommodating portion, and the end portion and the recess accommodating portion are fixed with a fixing agent such as silicone rubber. Can be fixed by filling the gap.
With this configuration, it is possible to use a durable polymer that is unlikely to crack or rust, like a porcelain insulator, and that the polymer can firmly fix the end of the insulator to the end fitting. The durability can be remarkably improved as compared with a configuration in which the end fitting is solidified with cement or the like.

In another aspect according to the present invention, a rotation center of the rotation mechanism in the first direction may be provided at a position of the external functional material attachment portion extending a center axis of the core material.
With this configuration, it is possible to ensure a configuration in which the polymer rotates at the end of the core material of the insulator. Further, due to the presence of the external functional material mounting portion integrated with the durable end fitting, the durability can be maintained even if the turning operation is repeated for a long time.
In another aspect according to the present invention, a rotation mechanism in a second direction substantially orthogonal to the first direction may be provided at a position of the mounting fixture on the side of the mounted body.
With this configuration, the mounting fixture can be supported with the polymer rotating in two directions with respect to the insulator, so that durability can be maintained even in severe environments such as gusts and heavy snowfall.

In another embodiment according to the present invention, the external functional material mounting portion may be configured to be integrated at a position closer to the mounted body than the end fitting.
With this configuration, the external functional material mounting portion is closer to the mounted body than the end metal fittings, so that the external functional material mounting portion including the rotating mechanism can be easily configured.
In another embodiment according to the present invention, an arc horn can be attached to the external functional material attachment portion.

In another embodiment according to the present invention, the external functional material mounting portion is provided at a position opposite to the opening of the recess accommodating portion, and the overall shape of the integrated body in a front view is substantially T-shaped. You can also.
With this configuration, the external functional material can be easily attached in a symmetrical shape because it is substantially T-shaped. In addition, since it becomes possible to attach the external functional material at a position distant from the end fitting, interference with the insulator can be suppressed.
In another aspect according to the present invention, at least a mark portion at an initial use position with respect to the rotation center of the rotation mechanism in the first direction is provided on the external functional material attachment portion, and the mark portion with time is provided. It is also possible to determine the amount of wear and the replacement time based on the actual displacement.
With this configuration, the wear state of the polymer insulator can be accurately determined at the time of inspection by providing the mark portion at the initial use position based on the rotation center of the rotation mechanism in the first direction where the force is most easily applied. .

In another aspect according to the present invention, a mark portion at an initial use position is provided at a predetermined position of the attachment with reference to the center of rotation of the rotation mechanism in the second direction, and the mark portion has a temporal change. It is also possible to adopt a configuration in which the amount of wear and the time of replacement are determined based on the appropriate displacement.
In another embodiment according to the present invention, in each of the above-described configurations, a mark portion at a wear limit position may be provided at a predetermined position in addition to the mark portion at the initial use position.

  As described above, according to the present invention, while solving the problem that the porcelain insulator is not durable, at the site where the existing porcelain insulator is adopted, in terms of the overall length and the insulator performance, it is easy to use. A practical polymer insulator mounting structure that can be replaced by a polymer can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows 1st Embodiment, It is the front view of the polymer suspension insulator provided with the attachment structure of a polymer insulator, and the principal part enlarged view. It is an example of a front view of an integrated thing concerning a 1st embodiment. It is an example of a side view of an integrated thing concerning a 1st embodiment. It is a figure explaining the fixing method which inserts the end part of a polymer insulator in the recessed accommodation part of an end fitting, and fills the clearance gap between the end part and the recessed accommodation part with fixing agents, such as silicone rubber. It is a figure which shows 2nd Embodiment, It is a front view of the polymer suspension insulator provided with the attachment structure of the polymer insulator, and the principal part enlarged view. It is a figure showing an important section at the time of applying an integrated thing concerning Drawing 2a to a 2nd embodiment. It is a figure showing an important section at the time of applying an integrated thing which has a clevis part to a 2nd embodiment. It is the front view which shows an example of the porcelain suspension insulator which mounted the conventional arc horn, and the enlarged view of the principal part. It is a fragmentary longitudinal cross-sectional view of the ball socket part of the conventional porcelain insulator.

[First Embodiment]
FIGS. 1 to 3 are views for explaining a mounting structure of a polymer insulator according to the first embodiment of the present invention.
Hereinafter, a polymer suspension insulator 1 will be described as an example of a polymer insulator. The polymer suspension insulator 1 has a fixture 3 for suspending and supporting a ground wire or an electric wire or the like to the attached body 2, and an integrated body 9 supported by the fixture 3. The integrated member 9 is a member in which the external function mounting portion 8 and the end fitting 7 of the polymer insulator 6 are integrated.
In this embodiment, a configuration is provided in which the polymer insulator 21, the suspension clamp portion 22, and the arc horn 17 are provided vertically.

(Rotating mechanism 16 in second direction)
The mounting fixture 3 has a mounting seat 24 fixed to the lower surface of the mounted body 2 such as a steel tower, and a right-angle clevis link 25 rotatably connected to the mounting seat 24.
The mounting seat 24 has a substantially rectangular shape having a hole (not shown) at a substantially central portion. In FIG. 1, a pair of bearing portions 26, 26 extend downward from the lower surface side. The pair of bearings 26, 26 are provided with holes for inserting the support shafts in the lateral direction, and the link portions 25a of the right-angle clevis links 25 are located between the bearings 26, 26, and The right angle clevis link 25 is configured to be rotatable by inserting a certain bolt 27 and screwing a nut 28 together. This rotating mechanism is the above-described second-direction rotating mechanism.
In this rotation mechanism, the pair of bearings 26, 26 are arranged side by side substantially parallel to the direction of the ground wire (not shown). It turns in a direction substantially orthogonal to the direction.
The mounting seat 24 is formed by screwing a bolt 29 and a nut 30 into holes provided in the mounting body 2 in advance and holes provided at four corners of the mounting seat 24. It is fixed to the lower surface side.

(Rotation mechanism 12 in first direction)
A hole is provided in the clevis portion 25b provided below the right-angle clevis link 25, the hole is aligned with the center hole 31 (see FIG. 2A) of the external function mounting portion 8, and a bolt as a support shaft is inserted therethrough. The rotation mechanism 12 in the first direction is formed by screwing the nut 32 together. The turning direction of the turning mechanism 12 is substantially orthogonal to the turning direction of the right-angle clevis link 25, so that the turning mechanism 12 can turn in a direction substantially parallel to the direction of the ground line.
It should be noted that the above-described rotating mechanisms 14 and 12 are shown as an example, and it is also possible to employ a rotating mechanism having another configuration as appropriate.

(End fitting 7 and polymer insulator 6)
As shown in FIG. 3, the end fitting 7 is a container having a recess accommodating portion 10 into which a polymer insulator end 6a (hereinafter, referred to as a polymer end 6a) is inserted.
Further, a dish-shaped edge 34 is provided so as to be connected to the opening of the recess accommodating portion 10, and a fixing agent 11 such as silicone rubber is poured into a gap between the polymer end 6 a inserted from the opening and the recess accommodating portion 10 for sealing. There is.
With this configuration, it is possible to strongly suppress mechanical stress, adhesion of salt, and damage caused by freezing in a state where water has entered.
In particular, the upper portion, the side surface, and the like of the end fitting 7 integrated with the external functional material mounting portion 8 often receive a large force related to the external functional material 8 and an irregular force such as vibration due to wind or rain. Therefore, sealing the end fitting 7 of the integrated member 9 with the fixing agent 11 has a great effect of preventing breakage.

(Integration of the end fitting 7 and the external functional material mounting portion 8)
The external functional material mounting portion 8 is one of the members provided on the mounting tool 3 and is a component for mounting a necessary external functional material in a state where the polymer is kept at a predetermined distance from the insulator without interference.
The attachment form of the external functional material to the attachment 3 is as follows.
(First Embodiment) A configuration in which the polymer is attached to the fixture 3 independently of the pivoting operation of the insulator 6 (Second embodiment) A configuration in which the polymer is attached to the fixture 3 in a form that pivots with the pivoting motion of the insulator 6 Two types are conceivable. The configuration shown in FIGS. 1 and 4 is the configuration of the second embodiment, and employs a configuration in which the external functional material rotates around the rotation center 12 a together with the polymer insulator 6.
In the configuration shown in FIGS. 2A and 2B, the integrated body 9 has a configuration in which a rhombic plate-shaped body is fixed to the upper part of the end fitting 7 which is shown in a cylindrical shape in appearance. A center hole 31 is formed at the center of the rhombic plate, and bolt holes 43, 43 are formed for external functional materials.
The manufacturing method for integrating the end fitting and the external functional material mounting portion is not particularly limited as long as the predetermined strength and durability are satisfied.

In the present embodiment, the integrated shape 9 allows the overall shape of the end fitting 7 and the external functional material mounting portion 8 to be comprehensively designed according to the purpose and use of the insulator. This is not only in the configuration shown in FIG. 3 except that the general shape of the end fitting 7 such as a cylinder is largely separated from the external shape as shown in FIG. It means that it becomes possible to provide the external functional material to the attachment 3 at a preferable position or state according to the purpose and configuration of the insulator, such as a Y-shape.

(Relationship between core material curvature and durability peculiar to polymer insulators)
As shown in FIGS. 5 and 6, in the multiple connection type of the large diameter portion 14 of the polymer insulator 6, θ is the swing width between the insulator core 13 (see FIG. 3) and the angle θ. Since the polymer insulator 6 itself is made of a synthetic resin, the flexibility and flexibility of the combination of the core material 13 and the large diameter portion 14 allow the polymer insulator 6 to swing considerably. However, the risk of damage due to a large force due to local rust or the like in the rotatable ball pin portion or the like is reduced.
Conversely, in order to make use of the flexibility and flexibility of the combination of the core material 13 and the large-diameter portion 14 to maintain durability, the polymer end is firmly fixed in the end fitting 7. It is necessary.
Note that the configuration shown in FIG. 5 is a configuration that can rotate only in one direction (only the rotation mechanism 16 in the second direction) as in a second embodiment to be described later. In FIG. 5, the polymer insulator 6 is not so deformed in a direction substantially perpendicular to the line portion. On the other hand, when a strong wind that fluctuates in the direction of the line blows, the polymer insulator 6 bends greatly as indicated by θ.

(A device that makes it easy to change the degree of wear and damage during inspection)
As shown in FIG. 2A, when the pivoting connection portion of the pivoting mechanism, such as the center hole 31, the external function mounting portion 8, the clevis portion, etc.) is displaced due to wear, rust, etc. A mark portion 18 at the initial use position is provided on the external function mounting portion 8 so that the displacement amount can be understood. The external function mounting portion 8 is often formed of a flat plate as shown in FIG. 2B, and is preferably a member to which a large force is constantly applied and displacement due to abrasion is likely to be large.
The mark portion 18 shown in FIG. 1 indicates a position state at the start of use by means such as a horizontal line drawn by paint such as paint, a horizontal engraving line, and a horizontal protrusion line. Further, a mark portion 19 at the wear limit position may be provided. In FIG. 1, it is indicated by a dotted line 19 at a position hidden by the clevis portion 25b. In this case, two horizontal lines will be provided.
In addition, since the mark portion 18 is provided near the lower side of the rotation center 12a, the displacement amount is likely to be large, and abnormalities near the rotation center are naturally noticeable during inspection, which is preferable.
As described above, it is possible to grasp the state of deterioration of the polymer insulator from the initial state by the length of displacement of the initial position of use and displacement. Note that the mark portions 18 and 19 include not only horizontal lines but also a color classification for each length region and a form in which various two-dimensional pattern shapes such as a lattice pattern and a turtle pattern are broken as a guide for replacement. .

[Second embodiment]
The feature of the second embodiment of the configuration shown in FIG. 4 is that the first-direction rotating mechanism 12 that rotates in parallel with the mounted body 2 is omitted, and only the second-direction rotating mechanism 16 is provided. is there.
In this configuration, as shown in FIG. 5, the clevis portions 36 for the second-direction rotating mechanism 16 are directly mounted on the mounting seat 24 that receives the mounted body 2, and are rotatably supported. .
On the other hand, in the configuration shown in FIG. 6, the clevis portion 42 extends upward from the integrated object 9 side, and is rotatably supported by the link portion 41 hanging down from the mounting seat 24. In FIGS. 5 and 6, reference numeral 38 denotes a bolt, and reference numeral 39 denotes a nut, which rotates the integrated body 9.
Further, in this configuration, since the rotation mechanism 12 in the first direction is omitted, the total length of the polymer suspension insulator can be set short, and the configuration can be simplified and the number of parts can be reduced, so that the cost can be reduced.
However, since the rotation of the polymer insulator due to rain and wind is configured only by the rotation of the rotation mechanism in the second direction, the configuration depends on the excellent flexibility and elasticity of the polymer. Therefore, in the case of displacement due to the above-described deterioration due to wear or rust, it is more desirable than in the first embodiment to provide the mark portion 18 at the initial use position so that the displacement amount can be recognized. In addition, it is considered that the necessity of the mark portion 19 at the wear limit position is often required more than in the first embodiment.

Hereinafter, other advantages of the above embodiments will be described.
[Other advantages of the configuration of the first embodiment and the configuration of the second embodiment]
(Excellent point of polymer insulator)
In general, polymer insulators are superior to porcelain insulators in each respect.
● The porcelain is lighter and harder to break than porcelain. The structure that is lightweight and does not break means that the burden on the workers such as the ridge of the mountain and the steel tower provided on the top can be greatly reduced.
● Polymer insulators are easier to obtain water-repelling performance than porcelain insulators, so that the insulator in a hat-shape is less likely to be soiled and has the advantage of reducing the number of insulator cleanings within a predetermined period.

(Issues when using a polymer insulator as a suspension system)
● Since the lightning impulse performance of polymer insulators is slightly inferior to that of porcelain insulators, there is a problem that the insulator length is longer than that of porcelain suspension insulators and the run length is longer (the number of large-diameter portions increases).
-When the insulator length becomes longer, it is necessary to make fine adjustments depending on the difference in length when trying to adopt a polymer suspension insulator in the form of replacing it with a porcelain suspension insulator already used for a real steel tower, Alternatively, there has been a problem that it is difficult to secure a clearance with an existing tower.

In the present embodiment, the porcelain insulators installed on the shoreline which are vulnerable to salt damage and corrosion are remarkably durable and durable, such as a ball-and-socket type porcelain suspension insulator such as a ball-and-socket type described in the problem of the related art. It has a remarkable effect that can solve the fundamental problem that it is short and the replacement work becomes difficult, and can also solve the practical problem of smoothly replacing the already installed porcelain suspension insulator.
Comparison of the contents of the conventional six-piece porcelain suspension insulator shown in FIG. 7, the polymer suspension insulator of the first embodiment shown in FIG. 1, and the polymer suspension insulator of the second embodiment shown in FIG. Is shown below.

上記表１は、がいし性能を
１．コンパクト化の程度である装置全長
２．雷ＩＭＰ耐電圧、注水耐電圧というがいし本来の電気性能
３．施工性
４．製造に必要とする金具の数の面でのコストの低減程度
の各点から評価している。

Table 1 shows that the insulator performance is 1. 1. Overall length of the device, which is a degree of compactness 2. Original electrical performance of lightning IMP withstand voltage and water injection withstand voltage. Workability 4. The evaluation is made in terms of the degree of cost reduction in terms of the number of fittings required for manufacturing.

It should be noted that the overall length of the first embodiment and the second embodiment is equal to or shorter than that of the conventional product shown in FIG. 7, and the withstand voltage performance is improved. .
As a result, a new and useful polymer insulator can be provided which also solves the practical problem of smoothly replacing the already installed porcelain suspension insulator.
Although the price of the polymer insulator itself is higher than that of the porcelain insulator, the product of the present embodiment has a smaller number of metal fittings, so that the cost can be reduced and the weight of the conventional product shown in FIG. The form product is much lighter, for example, 10 kg, so that the burden on the operator at the time of construction, replacement, and inspection can be greatly reduced.
Further, in a configuration in which the polymer is capable of rotating only in a direction perpendicular to the line direction by utilizing the flexibility and flexibility of the polymer itself, the performance is deteriorated or damaged by providing the above-described mark portion. The early detection of the precursor of the problem can be sufficiently dealt with.

The present invention can be variously modified in addition to the above-described embodiment without departing from the scope of the present invention.
(1) In the above-described embodiment, the case where the arc horn is used as the external functional material has been described. However, other external functional materials can be exemplified by a lightning arrester, a jumper reinforcing metal fitting, and the like.
(2) In addition, as a method of manufacturing the end fitting, any product that satisfies a predetermined strength, such as a forged product or a cast product, can be employed in the same manner.

2 to be attached 3 to 3 mounting fixture 6 polymer insulator 6 a end of polymer insulator 7 end fitting 8 external functional material mounting section 9 integrated product 10 recess receiving section 11 fixing agent 12 fixing direction 1 The rotation mechanism 12a of the first direction The rotation center 13 of the rotation mechanism 13 The core 13a The center axis 14 of the core 14 The large diameter portion 16 The rotation mechanism 16a of the second direction The rotation of the second direction Center of rotation of mechanism 17 Arc horn 18 Mark at initial use position 19 Mark at wear limit position

Claims (10)

An attachment structure applied to a fixture for supporting a wire such as a ground wire or a power line in a stretched state or a suspended state with respect to an attached body such as a steel tower portion,
The mounting fixture is a polymer insulator provided with a large diameter portion made of an insulating polymer around a core material made of an insulating synthetic resin material, and an end fitting fixed by housing the end of the polymer insulator. A rotation mechanism that enables the polymer insulator to rotate in at least a first direction with respect to the attached body, an external function material attachment portion that mounts an external function material attached to the polymer insulator, and a connection to the rotation mechanism Having an integrated object,
The mounting structure of a polymer insulator, wherein the integrated product is obtained by integrating the end fitting and the external functional material mounting portion. 2. The mounting structure for a polymer insulator according to claim 1, wherein the end fitting includes a recess accommodating portion, and the end of the polymer insulator is inserted into the recess accommodating portion, and the end portion is fixed with a fixing agent such as silicone rubber. A mounting structure for a polymer insulator fixed by filling a gap in the recess accommodating portion. The mounting structure of the polymer insulator according to any one of claims 1 to 2, wherein the rotation mechanism in the first direction is provided at a position of the external functional material mounting portion extending a center axis of the core material. Attachment structure of polymer insulator with rotation center. 4. The mounting structure for a polymer insulator according to claim 3, wherein a rotation mechanism in a second direction substantially orthogonal to the rotation mechanism in the first direction is provided at a position of the mounting tool on the side of the body to be mounted. Construction. The mounting structure for a polymer insulator according to any one of claims 1 to 4, wherein the external functional material mounting portion is a polymer insulator integrated at a position closer to the body to be mounted than the end fitting. Mounting structure. The mounting structure for a polymer insulator according to any one of claims 1 to 5, wherein an arc horn is mounted on the external functional material mounting portion. The polymer insulator mounting structure according to claim 2, wherein the external functional material mounting portion is provided at a position opposite to the opening of the recess accommodating portion, and the overall shape of the integrated body in a front view is substantially T-shaped. Insulator mounting structure. The mounting structure for a polymer insulator according to any one of claims 1 to 4, wherein at least a mark portion at an initial use position on the basis of the rotation center of the rotation mechanism in the first direction is provided on the outside. A mounting structure for a polymer insulator that is provided on a functional material mounting portion and determines the amount of wear and replacement time based on the temporal displacement of the mark portion. 9. The mounting structure for a polymer insulator according to claim 8, wherein a mark portion at an initial use position is provided at a predetermined position of the mounting tool with respect to the rotation center of the rotation mechanism in the second direction. The mounting structure of a polymer insulator that determines the amount of wear and replacement time based on the displacement of the part over time. The mounting structure for a polymer insulator according to any one of claims 8 to 9, wherein a mark portion at a wear limit position is provided at a predetermined position in addition to the mark portion at the initial use position. .

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