JPH0654615B2 - Porcelain insulator with translucent body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention provides a translucent body used for supporting an electric line and for connecting an optical sensor for measuring a line voltage or a line current. Regarding the porcelain insulator provided.

(Prior Art) With the recent diversification of power demand, it is necessary to accurately and promptly respond to power supply. For this reason, the supply and management facilities of the electric power system have become complicated and diversified, and automation system development and commercialization have been 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 promptly, and in a wide range at a large number of locations. Therefore, the applicant of the present application has previously proposed a porcelain insulator (Japanese Patent Application No. 60-174556) provided with an optical transmission line suitable for transmitting a large amount of information.

As shown in FIG. 6, this insulator has a transparent body 23 integrally joined to a guide hole 22 provided in the axial center portion of the insulator body 21, and the transparent body 23 has both end faces 23a, 23b. After precision polishing, the optical sensor and the optical cable connector are joined to the polished surface.

(Problems to be Solved by the Invention) For this reason, when assembling parts to the insulator body 21, the translucent body 23 makes contact with the precision-polished end faces 23a, 23b by a metal fitting or a tool, and dents or scratches on the polished surface. Since scratches or stains are likely to occur, the work is troublesome and the work efficiency is low.

In view of the above circumstances, the present invention is provided with a light-transmitting body that does not cause damage to the precision-polished surface of the light-transmitting body, can perform work easily, and stably maintains the function of the light-transmitting body.
Moreover, the purpose of the present invention is to provide a compact porcelain insulator which can surely perform optical transmission by absorbing assembly errors.

Structure of the Invention (Means for Solving the Problems) The present invention has a hole formed in the axial center of a porcelain insulator body,
The translucent body is inserted into the hole, and the translucent body and the insulator body are fixed to each other by an inorganic insulating layer, and recesses are formed at both ends of the translucent body, and the bottom surfaces of these recesses are mirror-like. The optical sensor is bonded to the bottom of the recess on the wire support side, the optical connector is bonded to the bottom of the recess on the insulator fixing side, and the recess is slightly larger than the optical sensor and optical connector inside them. The electric wire clamp fitting is fixed to the insulator body so as to cover the optical sensor.

(Operation) Since the bottom surface of the recess is used as the polishing surface for bonding, it is possible to prevent metal fittings, tools, or the like from being attached to the insulator body when the parts are assembled to the insulator body, and protect the precision polishing surface. Further, the porcelain insulator maintains the insulator function, transmits light through the light transmitting body, and an optical sensor, an optical cable connector, or the like is joined to the light transmitting body, whereby an insulator device with an optical sensor is appropriately configured.

(Embodiment) An embodiment embodying the present invention will be described in detail below with reference to Figs.

As shown in FIG. 1, the insulator main body 1 made of fired porcelain, which has a predetermined shape and size, has both end faces 1a,
A guide hole 1c is provided so as to penetrate the shaft center portion between the 1b.

An optical fiber or a translucent body 2 such as an alumina rod or a quartz rod having high translucency is inserted into the guide hole 1c, and both ends thereof are slightly projected from both end faces 1a and 1b of the insulator body 1. There is.

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 integrally heat-fixed. ing. As the material of the insulating layer 3, a glaze for porcelain or a powder material of various glasses having a melting point lower than the firing temperature of the porcelain (about 1250 to 1300 ° C.) is selected. The insulator body 1 is fired together with the translucent body 2 from the green body, or is once fired into a predetermined shape, and then an inorganic insulating material for forming the insulating layer 3 and the translucent body 2 are attached to the insulator body 1 at a slightly low temperature. It has been re-fired in. However, when the insulator main body 1 is made of a material having a high firing temperature, such as a high-alumina-containing porcelain, a material having a high melting point may be appropriately selected as the inorganic insulating material.

As shown in FIG. 2, concave portions 4 and 5 each having a bottomed cylindrical shape are formed by grinding or grinding at both ends of the translucent body 2. The bottom surfaces 4a and 5a of the concave portions 4a and 5a are precisely polished into a mirror surface. As a joint surface. This polishing process may be performed before or after fixing the translucent body 2 to the insulator body 1.

As shown in FIG. 3, the porcelain insulator configured as described above has two bottom surfaces 4a and 5a which are precision polishing surfaces of the light-transmitting body 2,
The base end portion 6b of the voltage measuring optical sensor 6 including the electro-optical element 6a and the base end portion 8a of the optical connector 8 are joined together with an adhesive. In this case, the optical sensor 6 is located on the wire supporting side and the optical connector 8 is located on the insulator fixing side. Then, the flange fitting 10 is fixed to the upper portion of the insulator body 1 with cement 11. And a sealing material 12 such as an O-ring
The electric wire clamp metal fitting 14 for gripping the electric wire 13 via
The inner top surface thereof is electrically contacted with the optical sensor 6 via the auxiliary electrode 7 and the like, and is fixed by a bolt so as to cover the optical sensor 6. Similarly, the base metal fitting 16 is fitted to the lower part via a sealing material 15 such as an O-ring so as to cover the optical cable connector 8 and cement 17
It is stuck in. With this configuration, the insulator device having the optical sensor function can be easily configured.

In addition, in order to strengthen the insulation in the void around the optical sensor 6,
Fill with an insulator such as synthetic resin. Also, the recesses 4,
Reference numerals 5 are slightly larger than the base end 6b of the optical sensor 6 and the base end 8a of the connector 8, respectively.

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

Since the bottom surfaces 4a, 5a of the recesses 4, 5 respectively formed at both ends of the light-transmitting body 2 are used as the polishing surface for joining, when the parts are assembled to the insulator main body 1, it is possible to avoid accidentally applying a precision polishing surface such as a tool. Contact is prevented, and the polishing surface for bonding does not get scratches, scratches, or other damage or stains. Therefore, the assembly work becomes easy,
Work efficiency is improved. Further, the light-transmitting body 2 only needs to be locally polished at a predetermined portion, so that the polishing work is simple and the number of steps can be shortened easily.

Further, in this embodiment, the insulator body 1 and the translucent body 2 are integrally joined at high temperature via the insulating layer 3 made of an inorganic insulating material having heat resistance or non-deterioration property. Moisture and moisture are prevented from entering the interface between the main body 1 and the insulating layer 3, or the interface between the insulating layer 3 and the translucent body 2, the internal insulation of the insulator is prevented from being deteriorated or deteriorated, and the mechanical strength of the insulator itself is prevented. Is maintained stable.

Further, in this embodiment, since the insulator body 1 made of porcelain, the translucent body 2 made of high alumina or quartz rod, and the insulating layer 3 made of inorganic insulating material are all integrated with the inorganic material, the insulator machine is used. The weather resistance is improved together with the dynamic strength property, the sensor function and the durability performance of the insulator device are maintained, and the application of the optical application technology can be broadly applied to electric lines and electric devices.

Further, although there are some differences in the insulator main body 1, distortion due to firing is inevitably generated. Therefore,
Electric wire clamp metal fitting 14, electric wire 13, and base metal fitting 16
The positional relationship between and the both ends of the translucent body 2 is slightly different for each insulator. In this case, the base ends 6b and 8a of the optical sensor 6 and the optical connector 8 are located in the recesses 4 and 5 at both ends of the translucent body 2, and the recesses 4 and 5 are the base ends 6b and 8a.
Since it is slightly larger than the above, even if an assembly error occurs due to a difference in the positional relationship for each insulator as described above, the error can be absorbed. Therefore, optical transmission can be reliably performed.

Further, the electric wire 13 and the insulator body 1 generate vibration due to wind pressure, shaking of an earthquake, etc., and a discontinuous load is applied to the insulator based on the vibration. In this case, the optical sensor 6 and the optical connector 8
Even if is bonded to the translucent body 2, the optical sensor 6 and the optical connector 8 thereof may be slightly moved with respect to the translucent body 2. However, in this embodiment, as described above, the optical sensor 6 and the optical connector 8 have the concave portions 4 and 5 at both ends of the light transmitting body 2.
Since the recesses 4 and 5 are located inside, and the recesses 4 and 5 are slightly larger, the fine movement thereof is allowed, and the light transmission can be reliably performed without hindering the light transmission. In particular, it is extremely important for this type of insulator that the optical transmission is not hindered as described above in order to quickly grasp the disaster failure site during a strong wind down due to a typhoon or an earthquake.

Further, in this embodiment, the light-transmitting body 2 is arranged at the axis of the insulator main body 1, the optical sensor 6 is arranged at the end of the light-transmitting body 2, and the electric wire clamp is provided so as to cover the optical sensor 6. Since the metal fitting 14 is provided, the optical sensor 6 can be compactly arranged using the space between the light transmitting body 2 and the electric wire 13, and the line voltage and the like can be measured reliably.

The present invention may be implemented as follows.

(1) As shown in FIG. 4, the translucent body 2 is disposed so as to be sunk from both end surfaces 1a and 1b of the insulator body 1. In this case, the base ends 6b of the optical sensor 6 and the optical connector 8,
8a is lengthened so that the bottom surfaces 4a and 5a of the recesses 4 and 5 can be reached.

(2) As shown in FIG. 5, the recesses 4 and 5 at the upper and lower end portions of the light transmitting body 2 are grooves cut into the outer peripheral surface.

EFFECTS OF THE INVENTION As described in detail above, according to the present invention, since the bottom surfaces of the recesses formed at both ends of the light-transmitting body are the polishing surfaces for bonding the optical sensor, the light-transmitting body is not attached to the insulator body. In this case, it is possible to prevent accidental contact of other members such as tools with the polishing surface for joining and to protect them from damage, and therefore, the assembling work becomes simple and the work efficiency can be improved.

Also, as an insulator device, deterioration due to external conditions and aging can be prevented, and insulation or mechanical strength of the insulator can be maintained / improved, and the original function of the insulator can be maintained and a transmission as an optical transmission line for an optical sensor can be maintained. There is an excellent effect that the function of the light body can be stably maintained.

Further, even if the insulator body is distorted due to firing and causes an error in assembling the optical sensor or the like, the error can be absorbed by the configuration of the concave portion. Therefore, optical transmission can be reliably performed.

Further, even if a discontinuous load is applied to the insulator due to wind pressure, shaking of an earthquake, or the like, the optical transmission can be surely performed without any trouble in the optical transmission due to the configuration of the recess. Therefore, the function as an insulator of this kind can be effectively exhibited.

Further, the optical sensor can be arranged compactly by utilizing the space between the light transmitting body and the electric wire, and the line voltage and the like can be measured reliably.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment embodying the present invention, FIG. 2 is an enlarged perspective view of an essential part showing a translucent body, and FIG. 3 shows an embodiment of FIG. 1 using an optical sensor. FIG. 4 is a vertical sectional view showing another example of a porcelain insulator applied to an insulator device. FIG.
FIG. 6 is an enlarged perspective view of an essential part showing another example of a light-transmitting body, and FIG. 6 is a vertical sectional view showing a conventional example. 1 ... Insulator main body, 1c ... Conducting hole, 2 ... Translucent body, 4, 5
... recesses, 4a, 5a ... bottom surface, 6 ... optical sensor, 8 ...
… Optical connector, 14… Electric wire clamp fitting.

Claims (1)

[Claims] 1. A porcelain insulator body (1) having a hole (1
c) is penetrated, the light-transmitting body (2) is inserted into the hole (1c), and the light-transmitting body (2) and the insulator body (1) are fixed by the inorganic insulating layer (3), Recesses (4, 5) are formed at both ends of the light-transmitting body (2), and the bottom surfaces (4a, 5a) of these recesses (4,5) are mirror-finished polishing surfaces to form recesses on the wire supporting side. An optical sensor (6) is bonded to the bottom surface of (4), an optical connector (8) is bonded to the bottom surface of the recess (5) on the insulator fixing side, and the recesses (4, 5) are connected to the optical sensors inside them. (6) and the optical connector (8), and is provided with a light-transmitting body characterized in that the wire clamp metal fitting (14) is fixed to the insulator body (1) so as to cover the optical sensor (6). Porcelain insulator.