JP2000276957A - Deterioration indicating suspension insulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with inefficient and dangerous inspection for individually detecting deteriorated insulators through high elevated work using a special detection device. SOLUTION: This insulator 1 has a shade projecting around, a head 11 formed in the middle of an upper surface thereof, and a recess 12 for metallic pin fixing formed in the middle of an under surface thereof. The head 11 is provided with a metallic cap hardware 2 fixed thereto with a cement 41 and the recess 12 is provided with a metallic pin hardware 3 fixed thereto with a cement 42. As a deterioration indicating means producing a perceivable change in its appearance according to the change in internal stress of the insulator 1, a coating film is formed on a surface of the insulator 1, and the coating film contains microcapsules having outer shells to break by the change in outside stress and filled with a dye or a coloring material that develops a color in reaction with the outside air components.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hanging insulator having a display function for judging that the insulator has deteriorated when its insulator is deteriorated.

[0002]

2. Description of the Related Art Conventionally, as a method of detecting deterioration such as partial breakage of a suspended insulator or generation of minute cracks, for example, a phenomenon in which an insulation resistance value decreases during deterioration has been utilized. There is a method of measuring and detecting a change in the shared voltage. Also, a neon lamp type defect detector has been put to practical use. This is based on the presence or absence of the neon lamp, which is set so that the contact horn extending from the neon lamp is brought into contact with the insulator cap to be inspected, and it is turned on when the shared voltage is high and not turned on when it is low. For example, when it is turned on, it is determined that there is no abnormality.

[0003] According to such a conventional detection method, for this detection work, an inspector carries a defective insulator detection device, ascends to a steel tower or a concrete pole to which a hanging insulator is attached, and then performs an insulator connection. Inspection work had to be performed individually for each of the insulators composing the above, causing the following problems.

[0004] First, in the conventional method, since it is usually necessary to ascend to a steel tower and work near a power line which is energized at a high place, it is a dangerous work. In addition, for this purpose, it was necessary for a safety observer as well as a worker to perform monitoring work on site at the same time. For example, an insulator device installed per tower supporting a 500KV transmission line is composed of at least 23 to about 50 connecting insulators, and thus it is necessary to inspect such a huge number of insulators one by one. Due to the unstable operation described above, there is a problem that it takes a very long time and the working efficiency is poor.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and an inspection method for individually detecting degraded insulators by working at a high place using a special detection device. The present invention provides a pendant insulator having a deterioration display function capable of eliminating the need for a cradle.

[0006]

SUMMARY OF THE INVENTION The above-mentioned problem is caused by a suspension insulator having an insulator insulator, a cap fitting fixed to the head thereof with cement, and a pin fitting fixed to the back surface recess with cement. The deterioration display type suspension insulator according to the present invention, characterized in that at least one of these constituent members is provided with deterioration display means whose appearance changes according to a change in the intrinsic stress of the constituent members and which can be identified. Can be solved. Furthermore, the present invention is embodied in a form in which the deterioration indicating means is formed in a film-like form fixed on the surface of the constituent member of the hanging insulator, and in a form in which the deterioration indicating means is mixed with a cement portion of the hanging insulator. it can. Further, the deterioration display means includes a microcapsule in which a jacket is broken in response to a change in stress from the outside, and the microcapsule reacts with a dye or an atmospheric component to form a color. It can be embodied in a form in which a material is enclosed.

[0007] When such a suspended insulator is deteriorated, the distribution of intrinsic stress in the portion changes in comparison with the normal state due to the change in the structure of the insulator. Is concentrated. In such a case, according to the suspension insulator of the present invention, the appearance of the deterioration display means changes in accordance with the change in the intrinsic stress. As a result, the microcapsules are destroyed, the dye inside leaches out, and a color different from the color tone of the constituent members is developed, so that the change from normal to deteriorated can be identified.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment relating to a deterioration display type suspension insulator of the present invention will be described with reference to FIG. In FIG. 1, the deterioration-indicating suspension insulator of the present invention includes an insulator insulator 1, a cap fitting 2, a pin fitting 3, and cement portions 41 and 42, similarly to the conventional suspension insulator. The insulator 1 has an umbrella projecting therearound, a head 11 formed in the center of the upper surface, and a concave portion 12 for fixing a pin fitting in the center of the back, and a cement portion 41 is formed on the head 11. The fixed cap fitting 2 and the pin fitting 3 fixed by the cement portion 42 are provided in the recess 12.

In the embodiment of the present invention, the appearance of the insulator is changed according to the change in the intrinsic stress of the insulator, and the surface of the insulator is identified as a deterioration display means. It is characterized in that a film containing fine particles enclosing a coloring material which reacts with a dye or an atmospheric component to form a color is formed in a microcapsule whose outer cover is damaged according to the change.

In the deterioration display type suspension insulator configured as described above, when the insulator is deteriorated such as a fine crack is generated in the insulator, the distribution of the intrinsic stress in that part also changes, and the part is deteriorated. Stress concentrates on the pre-formed film, and the coating of the microcapsules in the film is broken, and the dye or coloring material inside leaches out to the outer surface to form a color. As a result, the deterioration phenomenon can be easily known by observing the appearance.

In the above description, an example is shown in which the deterioration indicator is provided on the surface of the insulator 1. However, all or all of the constituent members of the suspension insulator including the cap fitting 2 are provided.
It can be applied to more than species. The material of the microcapsules is preferably polyurethane, the shape is preferably spherical, and the external dimensions are preferably several μm to several tens μm. As the coloring material, a dye may be simply applied, or a coloring material which reacts with a component in the atmosphere to form a color may be used.

Here, in order to form a film mainly composed of microcapsules enclosing a coloring material as deterioration display means, these microcapsules are mixed, for example, in a solvent as a binder and applied to a target portion. Then, the required film is obtained by volatilizing and fixing the solvent. In the present invention, the deterioration indicating means is not only in the form of a film, but also because the microfilm capsule is preliminarily mixed with the cement part, which is a constituent member of the insulator, so that the deterioration of the cement part can be known as in the case of the film. Can be functioned as a deterioration display function for the purpose.

[0013]

As described above, the deterioration indicating type suspension insulator of the present invention is constructed as described above. Therefore, when its constituent members are deteriorated, it can be seen from a distant place on the ground or on a monitoring helicopter machine. The detection can be performed using a telescope, so that it is not necessary to perform a separate detection operation for the insulator using a special detection device. In addition, there is no need to ascend to a power transmission tower or the like, and there is an excellent effect that work efficiency is greatly improved such that dangerous high places are not required and a safety guard is not required, and inspection costs can be reduced. Therefore, the present invention has a very high industrial value as a deterioration display type suspension insulator which has solved the conventional problems.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an embodiment of the present invention.

[Explanation of symbols]

1 insulator insulator, 11 heads, 12 recesses, 2 cap fittings, 21, 22, 23, 3 pin fittings, 4
1,42 Cement section.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Satoshi Morikawa 2-56, Suda-cho, Mizuho-ku, Nagoya-shi, Aichi F-term in Japan Insulators Co., Ltd. 5G331 AA01 BB29 BB32 BC19 CA01 CB05 CC01 EB17

Claims (4)

[Claims] 1. A suspension insulator having an insulator insulator, a cap fitting fixed to the head thereof with cement, and a pin fitting fixed to the back surface recess thereof with cement, at least one of these constituent members includes: A deterioration display type suspension insulator characterized by comprising deterioration display means which changes its appearance in response to a change in the intrinsic stress of its constituent members and becomes identifiable. 2. The deterioration indicating type suspension insulator according to claim 1, wherein said deterioration indicating means is formed in the form of a film adhered on a surface of a constituent member of said hanging insulator. 3. The deterioration indicating type suspension insulator according to claim 1, wherein said deterioration indicating means is mixed with a cement portion of said suspension insulator. 4. The deterioration indicating means includes a microcapsule in which a jacket is broken in response to a change in stress from the outside, wherein the microcapsule reacts with a dye or an atmospheric component. The degradation display type suspension insulator according to claim 2 or 3, wherein a color-forming material for coloring is enclosed.