JP2536608Y2 - Insulator device with lightning protection unit - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulator device having a lightning arrester unit for insulating and supporting an electric wire and protecting a system line from a lightning surge. The present invention relates to an insulator device with a lightning arrester provided with a lightning arrester unit attached to the insulator main body.

[0002]

2. Description of the Related Art Insulator devices provided with a lightning arrester are roughly classified into Japanese Utility Model Publication No. 64-5305 and Japanese Utility Model Application Laid-Open No. 1-2.
They are classified into two types as shown in Japanese Patent No. 9934 and the like. The former type of insulator device encloses a lightning arrester consisting of a non-linear resistor and a pair of electrodes in a hollow portion provided concentrically on the insulator body, and the latter type of insulator device uses an insulator lightning arrester Are arranged on one side of the outer periphery of the device at predetermined intervals.

[0003]

[Problems to be Solved by the Invention] Among these types of insulator devices, in the former insulator device, when an excessive lightning surge causes the non-linear resistor of the lightning arrester unit to be destroyed, the following current from the line is generated. There is a possibility that the insulator may be damaged by high heat or pressure impact of the downstream arc flowing through the insulator main body and a secondary disaster may be induced. Further, in the latter insulator device, since the lightning arrester unit is located at a predetermined interval on the outer periphery of the insulator, there is a possibility that the maintenance work of the track may be hindered.

Accordingly, an object of the present invention is to provide a conductive glaze insulator having a conductive glaze applied to an insulator main body, and an insulator device provided with a lightning arrester unit mounted on the insulator main body. An object of the present invention is to provide an insulator device in which the insulator main body is not damaged even if the resistor is damaged, and the lightning arrester unit does not require a large arrangement space.

[0005]

SUMMARY OF THE INVENTION The present invention comprises a conductive glaze insulator having a conductive glaze applied to an insulator main body, and a lightning arrester unit assembled to the insulator main body, wherein the lightning arrester unit is provided with a non-linear resistor. And a pair of electrodes abutting each end of the non-linear resistor are integrally covered with an elastic insulating member to form a cylindrical shape, and the lightning arrester unit is fitted to the outer periphery of the insulator main body. It is characterized in that it is attached by mounting.

[0006]

In the insulator device having such a configuration, the leakage current from the line flows through the insulator body to generate Joule heat and dry the surface of the insulator body. For this reason, even if the surface of the insulator main body is soiled, the leakage current does not flow through a specific path, and partial discharge due to the leakage current is prevented, so that the insulation withstand voltage of the insulator device is stabilized.

In this insulator device, since the lightning arrester unit is fitted and mounted on the outer periphery of the insulator main body in a state of being covered with the elastic insulating member, the insulator main body and the lightning arrester unit are separated from each other by the insulating member. Even if the non-linear resistor is destroyed by the lightning surge and a follow-on arc is generated, the heat and pressure shock of the follow-on arc to the insulator body are alleviated, and the lightning arrester is placed at a predetermined distance from the outer periphery of the insulator. The lightning arrester unit arrangement space may be smaller than that of the insulator device which is disposed while maintaining the above, and the insulator device does not hinder the maintenance work of the track. Further, in the insulator device, since the leakage current flows on the surface of the insulator main body, the influence of the leakage current on the lightning arrester unit can be reduced, and the discharge characteristics are improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an insulator device according to the present invention.
3 shows a lightning arrester unit used in the insulator device, and FIG. 3 shows a state in which the lightning arrester knit is covered with an elastic member.

The insulator device comprises an insulator 10a and a lightning arrester 10
b. The insulator 10a is of a tight tip type, and includes an insulator main body 11, a base fitting 12, a pin fitting 1
3 and an arc cover 14, the base fitting 12 is fixed at the lower end of the insulator body 11 via cement,
The pin fitting 13 is fixed to the insulator main body 11 integrally with the base fitting 12 and protrudes downward. The arc cover 14 is made of semiconductive rubber, and is fitted and attached to the upper surface of the base fitting 12.

In the insulator 10a, the insulator body 11
A conductive glaze is applied to the entire outer periphery of the insulator to form a conductive glaze. The insulator is supported by being fixed by fastening the pin fitting 13 to the grounding object 21, and stands upright. The insulated wire 22 is supported by the bind wire 23 along the annular groove 11b. In addition, the insulated wire 22
A semiconductive covering member 24 is interposed between the wire 23 and the binding wire 23.

The lightning arrester unit 10b is formed by covering a pair of non-linear resistors 15a and 15b and a pair of electrodes 16 and 17 with an elastic insulating member 18. Both the non-linear resistors 15a and 15b have an arc shape with a predetermined thickness, and the two electrodes 16 and 17 have an annular shape. The upper and lower electrodes 16, 17 sandwich the non-linear resistors 15a and 15b. In this state, it is fastened and fixed with insulating bolts 19. Each electrode 16, 17 has a plurality of arc horns 16.
a, 17a are provided. The insulating member 18 is made of an elastic material such as ethylene propylene / rubber, and is formed by integrally molding the non-linear resistors 15a and 15b and the electrodes 16 and 17 integrally.

The insulating member 18 is formed in a cylindrical shape, and non-linear resistors 15a and 15b and electrodes 16 and 17 are embedded in a cylindrical main body 18a. The arc horns 16a and 17a of the electrodes 16 and 17 project from the upper or lower surface of the cylindrical main body 18a by a predetermined length. Insulation member 18
In the above, a plurality of folds 18
b is formed, and the inner peripheral surface 18 of the cylindrical main body 18a is formed.
c is formed in a wavy shape in the longitudinal direction. Cylindrical body 18
The inner circumference of “a” is formed slightly smaller than the outer circumference of the fitting portion of the insulator main body 11.

The lightning arrester unit 10b is fitted and attached to the outer periphery of the insulator main body 11. In this embodiment, the lightning arrester unit 10b is fitted by the elasticity of the insulating member 18, and furthermore is coated with a silicone-based adhesive applied to the inner peripheral surface 18c. It is installed elastically. When the lightning arrester unit 10b is fitted and attached to the insulator main body 11, the arc horn 16a of the upper electrode 16 forms a discharge gap G1 with the bind wire 23, and the arc horn 17b of the lower electrode 17 Form a discharge gap G2 with the base fitting 12.

In the insulator device configured as described above,
Leakage current from the insulated wire 22 flows to the surface of the insulator main body 11 via the bind wire 23 and the coating material 24 to generate Joule heat, so that a dry state is always maintained. For this reason,
Leakage current flowing on the surface of the insulator main body 11 does not concentrate on a specific path even when the insulator main body 11 becomes dirty, the current density is reduced, partial discharge is prevented, and the dielectric withstand voltage of the insulator main body 11 is stabilized. I do. In this case, since the semiconductive covering member 24 is interposed between the insulated wire 22 and the bind wire 23, the leakage current from the insulated wire 22 is shunted to the entire covering member 24, and The occurrence of partial discharge between the coil portions is prevented. For this reason, it is possible to prevent the occurrence of tracking caused by partial discharge, thereby preventing damage to the insulated wire, to reduce fluctuations in leakage current to the insulator main body 11, to stabilize the insulation function of the insulator in a dirty area, and This can be maintained for a long time.

However, in the insulator device, since the discharge gaps G1 and G2 are formed on the line side and the ground side, when the lightning surge penetrates through the insulated wire 22 and flashes over, the lightning surge is transmitted to the lightning protection unit 10b. Of the non-linear resistors 15a, 15
Then, the arc horn 17a is discharged from the arc horn 17a to the base fitting 12 through the b. As a result, the line of the system is protected from the lightning surge, and the following flow from the line is cut off or suppressed, the generation of the following arc is prevented, and the insulator body 11 and the insulated wire 22 are protected.

In the insulator device, when a non-linear resistor is destroyed by an excessive lightning surge, a follow-on arc is generated. However, the insulating member 18 of the lightning arrester 10b interrupts the follow-on arc to reduce high heat and pressure shock. To protect the insulator body 11. Further, since the leakage current from the insulated wire 22 flows on the surface of the insulator main body 11, the flow of the leakage current to the surface of the lightning arrester unit 10b decreases, and the discharge characteristics of the lightning surge in a dirty state are stabilized. .

If the surface of the insulating member 18 constituting the lightning arrester unit 10b is covered with a semiconductive member, even if the surface of the insulator device is contaminated and the leakage current increases, the leakage current will not increase. Since partial discharge is prevented by shunting over the entire surface of the surface, insulation deterioration due to tracking is prevented, and the stability of discharge characteristics of lightning surge is maintained.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of an insulator device according to an embodiment of the present invention.

FIG. 2 is a perspective view of an assembly of a non-linear resistor and an electrode constituting a lightning arrester unit employed in the insulator device.

FIG. 3 is a partially cutaway front view of the lightning arrester unit.

[Explanation of symbols]

10a: insulator, 10b: lightning arrester unit, 11: insulator body, 12: base fitting, 13: pin fitting, 15a, 15
b: non-linear resistor, 16, 17: electrode, 18: insulating member, 22: insulated wire, 23: bind wire, 24: covering member.

Claims (1)

(57) [Scope of request for utility model registration] An insulator body is provided with a conductive glaze having a conductive glaze applied thereto, and a lightning arrester unit attached to the insulator body, wherein the lightning arrester unit comprises a non-linear resistor and a non-linear resistor. A pair of electrodes contacting the ends are integrally covered with an elastic insulating member to form a cylindrical shape, and the lightning arrester unit is fitted and mounted on the outer periphery of the insulator main body. Insulator device with lightning protection unit.