JPS62290017A - Ceramic insulator with light transmitting body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention Purpose of the Invention (Industrial Application Field) This invention is used to support electric lines, and is connected to optical sensors that measure line voltage, line current, etc. The present invention relates to a porcelain insulator equipped with a translucent body for

(Prior Art) In recent years, with the diversification of power demand, it has become necessary to accurately and quickly respond to power supply. For this reason, power system supply and management facilities are becoming more complex and diversified, and automation system development and practical application are being promoted. In addition, the collection of information related to power supply, for example, the detection and measurement of line voltage and current, must be performed accurately and quickly, over a wide range, and at many locations. Therefore, the applicant of the present application has previously proposed a porcelain insulator (Japanese Patent Application No. 6O-174556) equipped with an optical transmission path suitable for transmitting a large amount of information.

As shown in FIG. 6, this insulator has a transparent body 23 integrally joined to a guiding hole 22 provided in the axial center of an insulator body 21, and this transparent body 23 has both end faces 23a, 23b. are precisely polished and optical sensors and optical cable connectors are connected to these polished surfaces.

(Problem to be Solved by the Invention) For this reason, when the transparent body 23 is assembled into the insulator body 21, metal fittings or tools may come into contact with the precisely polished end surfaces 23a and 23b, causing dents or dents on the polished surface. There are problems in that the work is troublesome and the work efficiency is low because it is easy to get scratched or dirty.

In view of the above-mentioned circumstances, this invention provides a porcelain insulator equipped with a transparent body that allows work to be carried out easily without causing damage to the precisely polished surface of the transparent body, and that stably maintains the function of the transparent body. The purpose is to provide

Structure of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a transparent body arranged in the axial direction of the insulator body, and recesses are formed at both ends of the transparent body. The bottom surfaces of both the recesses were used as bonding polishing surfaces.

(Function) Since the bottom surface of the concave portion is a polished surface for bonding, it is possible to prevent metal fittings or tools from touching the polished surface for bonding when assembling parts to the insulator body, thereby protecting the precision polished surface. Furthermore, the porcelain insulator maintains its insulator function and transmits light through the transparent body, and by joining an optical sensor, an optical cable connector, etc. to the transparent body, an insulator device with an optical sensor can be constructed as appropriate.

(Embodiment) Hereinafter, an embodiment embodying the present invention will be described in detail with reference to FIGS. 1 to 3.

As shown in FIG. 1, an insulator body 1 made of fired porcelain formed into a predetermined shape and one dimension has both end surfaces 1a,
A guide hole 1C is provided passing through the axial center portion between Ib.

An optical fiber or a highly transparent material 2 such as alumina zelkova or quartz rod is inserted into the guide hole 1c, and both ends thereof are connected to both end surfaces 1a of the insulator body 1.

It protrudes slightly from 1b.

An insulating layer 3 made of an inorganic insulating material such as porcelain glaze or glass is welded to the gap between the guide hole 1c and the transparent body 2, and the insulator body 1 and the transparent body 2 are fixed together by heating. ing. As the material for the insulating layer 3, porcelain glaze or various glass powder materials having a melting point lower than the firing temperature of porcelain (approximately 1250 to 1300°C) are selected.

The insulator body 1 is fired from a green raw material together with the transparent body 2, or after once fired into a predetermined shape, an inorganic insulating material and the transparent body 2 for forming the insulating layer 3 are attached, and the body is heated at a slightly low temperature. It has been refired. However, when using a material with a high firing temperature such as high alumina content porcelain for the insulator body 1,
As the inorganic insulating material, a material having a high melting point may be appropriately selected.

At both ends of the transparent body 2, recesses 4.5 having a bottomed cylindrical shape as shown in FIG. It is used as a joint surface. This polishing process may be performed before or after fixing the transparent body 2 to the insulator body 1.

As shown in FIG. 3, the porcelain insulator constructed as described above has two bottom surfaces 4a and 5a, which are precisely polished surfaces of the transparent body 2.
The base end 6b of the optical sensor 6 for voltage measurement and the base end 8a of the optical cable connector 8, each equipped with an electro-optical element 6a.
and other optical sensor parts are bonded using adhesive. Then, a flange fitting 10 is fixed to the upper part of the insulator body 1 with cement 11, and a clamp fitting 14 that grips the electric wire 13 via a sealing material 12 such as an O-ring is attached.
Its inner top surface is brought into electrical contact with the optical sensor 6 via the auxiliary electrode 7, etc., and fixed with bolts, and the base metal fitting 1 is also connected to the lower part through a sealing material 15 such as an O-ring.
6 and fixed with cement 17, an insulator device having an optical sensor function can be easily constructed.

Note that the gap around the optical sensor 6 is provided with insulation reinforcement.
Fill with insulating material such as synthetic resin.

Next, the operation of the porcelain insulator constructed as described above will be explained.

Since the bottom surfaces 4a and 5a of the recesses 4.5 formed at both ends of the translucent body 2 are used as polished surfaces for bonding the optical sensor, the precision polished surfaces of tools, etc., are used when assembling parts to the insulator body 1. Accidental contact with the bonding surface is prevented, and the polished surface for bonding is free from damage such as dents, scratches, and stains. Therefore, assembly work becomes easier and work efficiency improves. In addition, the transparent body 2 only needs to be locally polished at predetermined locations, making the polishing work simple and the number of man-hours easily reduced.

Furthermore, in this embodiment, the insulator body 1 and the transparent body 2 are integrally bonded at high temperature via the insulating layer 3 made of an inorganic insulating material that is heat resistant or non-degradable. This prevents moisture and moisture from entering the interface between 1 and the insulating layer 3, or the insulating layer 2 and the transparent body 2, preventing the internal insulation of the insulator from decreasing or deteriorating, and stabilizing the mechanical strength of the insulator itself. and maintained.

Furthermore, in this embodiment, the insulator body l made of porcelain, the transparent body 2 made of high alumina or quartz rod, and the insulating layer 3 made of inorganic insulating material are all integrated with inorganic materials, so the insulator machine The weather resistance as well as the physical strength characteristics are improved, the sensor function and the durability of the insulator device are maintained, and the use of optical application technology can be expanded to a wide range of electric lines and electrical equipment.

Note that this invention may be implemented as follows.

(1) As shown in FIG. 4, the transparent body 2 is disposed so as to be sunk below both end surfaces 1a and lb of the insulator body 1.

(2) As shown in FIG. 5, the recesses 4 and 5 at both upper and lower ends of the transparent body 2 are grooves cut through the outer peripheral surface.

Effects of the Invention As detailed above, in this invention, the bottom surfaces of the recesses formed at both ends of the light-transmitting body are used as polished surfaces for bonding optical sensors, etc., so that when the light-transmitting body is assembled to the insulator body, In this case, it is possible to prevent other members such as tools from accidentally coming into contact with the bonding polishing surface, thereby protecting it from damage.This also simplifies the assembly work and improves work efficiency.

In addition, as an insulator device, it can prevent deterioration due to external conditions and aging, maintain and improve the insulation and mechanical strength of the insulator, maintain the original function of the insulator, and serve as a transparent optical transmission path for optical sensors. It has an excellent effect of stably maintaining the function of the light body.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view showing an embodiment embodying the present invention, FIG. 2 is an enlarged perspective view of the main part showing a transparent body, and FIG.
A vertical cross-sectional view of the embodiment shown in the figure applied to an insulator device using an optical sensor, FIG. 4 is a vertical cross-sectional view showing another example of a porcelain insulator, and FIG. 5 is an enlarged perspective view of the main part showing another example of a transparent body. 6 are longitudinal sectional views showing a conventional example. DESCRIPTION OF SYMBOLS 1... Insulator body, 2... Translucent body, 4, 5... Recessed part, 4a, 5a... Bottom surface.

Claims (1)

[Claims] 1. A transparent body (2) is arranged in the axial direction of the insulator body (1),
A light-transmitting device characterized in that recesses (4, 5) are formed at both ends of the light-transmitting body (2), and the bottom surfaces (4a, 5a) of the recesses (4, 5) are polished surfaces for bonding. A porcelain insulator with a body. 2. A porcelain insulator equipped with a transparent body according to claim 1, wherein the transparent body (2) is integrally joined to the insulator body (1) via an inorganic insulating layer (3).