JP2536607Y2 - 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 provided with a lightning arrester unit used for insulatingly supporting an electric line and protecting it from lightning surge.

[0002]

2. Description of the Related Art As one type of an insulator device having the above-described functions, as shown in Japanese Utility Model Publication No. 29934/1990, a non-linear resistor whose both ends are sandwiched by a pair of electrodes is insulated by an insulating member. The enclosed lightning arrester unit is supported in parallel outside the insulator so that the discharge end of one electrode of the lightning arrester protrudes toward the power application unit and the discharge end of the other electrode protrudes toward the ground unit. There is an insulator device provided with a lightning arrester unit.

In the insulator device, a support fitting having a support portion protruding outside the base fitting is provided on a base fitting constituting the insulator, and the lightning arrester unit is provided on the other electrode side with this support fitting. It is supported by the distal end of the support portion and is arranged upright. In the lightning arrester unit, an annular intermediate electrode surrounding the outer periphery of the insulator is connected to one electrode side. With this configuration, in the insulator device, when a lightning surge causes an overvoltage in the electric wire due to the lightning surge, the lightning surge is discharged from the electric wire and captured by the intermediate electrode. The captured lightning surge flows from the intermediate electrode through one electrode of the lightning protection unit and the non-linear resistor, and is emitted from the other electrode. In this case, in the lightning arrester, the resistance value is reduced to eliminate the shock overvoltage through the excessive current of the lightning surge, and then the resistance value is recovered and the subsequent discharge is immediately interrupted to restore the insulation to the power line. .

[0004]

However, in the insulator device, the lightning arrester is located at the end of the support metal provided on the base metal and is located close to the insulator main body. If the insulator is destroyed by an excessive lightning surge and a downstream arc is generated, the insulator body may be damaged by being exposed to the downstream arc. In addition, the lightning arrester is arranged in an upright position, and the ring-shaped intermediate electrode is connected to the upper end, so that the supporting state is not always stable, and it is easy to tilt due to vibration and external contact. There is a possibility that the discharge gap fluctuates. Therefore, the purpose of the present invention is to address these problems.

[0005]

Means for Solving the Problems A first invention of the present invention is as follows.
A lightning arrester unit in which a non-linear resistor sandwiched at both ends by a pair of electrodes is enclosed by an insulating member is supported in parallel outside the insulator, and a discharge end of one electrode of the lightning arrester unit is charged. In the insulator device provided with a lightning arrester unit which is protruded toward the ground portion and the discharge end of the other electrode is protruded toward the ground portion side, the base metal member constituting the insulator is insulated from the power application unit side. An insulating member having a supporting portion projecting outside the base metal fitting is provided, the lightning arrester unit is supported on the supporting portion of the insulating member in a suspended manner, and the discharge end of the other electrode of the lightning arrester unit is connected to the grounding portion. And a discharge end of one of the electrodes of the lightning arrester is projected toward the power application unit through the insulating member.

In a second aspect of the present invention, a lightning arrester unit comprising a non-linear resistor sandwiched between a pair of electrodes at both ends by an insulating member is supported in parallel outside the insulator. An insulator device provided with a lightning arrester having a discharge end of one electrode of the lightning arrester protruding toward the power application unit and a discharge end of the other electrode protruding toward the ground unit, wherein the base constituting the insulator is provided. The base member is insulated from the power-applying part side in the metal fittings, and an insulating member having a housing located outside the base metal is provided, and the lightning arrester unit is housed in the housing of the insulating member. A discharge end of one of the electrodes is protruded toward the power application unit, and a discharge end of the other electrode is protruded toward the ground unit.

[0007]

In the insulator device constructed as described above, when a lightning surge causes an overvoltage in the electric wire, the lightning surge is discharged from the electric wire and captured by one electrode of the lightning arrester unit. The captured lightning surge flows through the non-linear resistor of the lightning protection unit and is emitted from the other electrode. Therefore, in the insulator device, similarly to the conventional insulator device of this type, the shock overvoltage is extinguished through the excessive current of the lightning surge, and then the resistance value is recovered and the subsequent discharge is immediately interrupted. Restore insulation to wires.

In the insulator device, since the lightning arrester is isolated from the insulator main body and is cut off from the insulator main body by the insulating member, the lightning arrester is destroyed by an excessive lightning surge and a subsequent arc is generated. Even if the insulator body is not exposed to the downstream arc, the insulator body will not be damaged. Also, since the lightning arrester unit is supported in a suspended manner by the support portion provided on the insulating member or is housed in the housing portion provided on the insulating member, the supporting state of the lightning arrester unit is extremely stable, There is no possibility that the discharge gap fluctuates due to tilting due to vibration and external contact.

[0009]

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 a first embodiment of the present invention. The insulator device A includes an insulator 10a and a lightning arrester unit 20a. The insulator 10a includes a tie-top type insulator main body 11, a base metal fitting 12, and a pin metal fitting 13. The base metal fitting 12 is fixed to the outer periphery of a lower end portion of the insulator main body 11 via cement 14, and the pin metal fitting 13 is The base fitting 12 is fixed together with the cement 14 together with the base fitting 12 in a state where the base fitting 12 is hung at the lower center of the base fitting 12.

The insulator 10a is provided with an insulating member 15 having a support. The insulating member 15 is composed of a cylindrical covering portion 15a and a plate-like supporting portion 15b protruding from the outer periphery to one side, and a fitting groove 15c provided on the lower surface side of the covering portion 15a is formed at the upper opening edge of the base fitting 12. It is fitted to the portion, is hooked on the edge of the opening, and is fixed to the insulator main body 11 by the cement 14. In this state, the insulating member 1
The covering portion 15a of 5 covers the outer periphery of the upper end portion of the base metal member 12, and shields the base metal member 12 from the power application unit side. The supporting portion 15b of the insulating member 15 protrudes from the outer peripheral edge of the covering portion 15a toward the one side by a predetermined amount, and the tip of the supporting portion 15b supports the lightning arrester unit 20a.

The lightning arrester 20a is a known type, and comprises a non-linear resistor 21, a pair of electrodes 22, 23, and an insulating member 24 made of an elastic material such as rubber. The non-linear resistor 21 is a zinc oxide-based resistor, and the electrodes 22 and 23 are fixed to the upper and lower end surfaces of the non-linear resistor 21 so that the tips of the electrodes 22 and 23 are slightly exposed. In this state, it is covered and covered by the insulating member 24. In such a lightning arrester unit 20a, the upper electrode 2
At 2, it is fixed to the tip of the support portion 15 b of the insulating member 15, and is supported on the pin fitting 13 side in a suspended manner in parallel with the pin fitting 13. In fixing the upper electrode 22, the arc horn 22a is interposed on the upper surface side of the support portion 15b, and the arc horn 22a protrudes toward the power application portion.

An arc horn 23a is fixed to the tip of the lower electrode 23 of the lightning arrester 20a. The arc horn 23a extends horizontally and faces the pin fitting 13 side. An insulating plate 15d is fixed to the base end of the support portion 15b, and the insulating plate 15d protrudes downward between the base fitting 12 and the lightning arrester unit 20a.

The insulator device A is mounted upright on a pin fitting 13 via a nut 32 to a laterally protruding arm bar 31 disposed above a power pole and protruding in the lateral direction. An electric wire 33 along the outer circumferential groove is fixed to and supported by the insulator main body 11 by a bind wire 34. In addition, electric wire 3
Numeral 3 designates a conductor insulated and covered with a binding wire 3
Reference numeral 4 denotes a coil wound around the outer periphery of the electric wire 33. In this state, the arc horn 22a connected to the upper electrode 22 of the lightning arrester unit 20a forms a discharge gap G1 while maintaining a predetermined distance from the bind wire 34, and the lower electrode 2
The arc horn 23a connected to 3 forms a discharge gap G2 while maintaining a predetermined distance from the arm metal 31. Since the discharge gap G2 is a small auxiliary gap, the arc horn 23a and the arm 31 may be electrically connected.

In the insulator device A thus configured, when an impact overvoltage occurs in the electric wire 33 due to the lightning surge, the lightning surge is discharged from the bind wire 34 of the electric wire 33 and captured by the arc horn 22a. The captured lightning surge flows from the arc horn 22a to the upper electrode 22, the non-linear resistor 21, and the lower electrode 23 of the lightning arrester 20a, and is discharged from the arc horn 23a. In this case, in the lightning arrester unit 20a, the resistance value is reduced to extinguish the shock overvoltage through the excessive current of the lightning surge, and then the resistance value is recovered to immediately stop the discharge of the downstream current, and the electric wire 3
Restore insulation to 3.

Incidentally, in the insulator device A, since the lightning arrester unit 20a is located below the insulator main body 11 and is cut off from the insulator main body 11 by the insulating member 15, the lightning arrester unit 20a is destroyed by an excessive lightning surge. Therefore, even if the downstream arc is generated, the insulator main body 11 is not exposed to the downstream arc, and the insulator main body 11 is not damaged. Further, since the lightning arrester unit 20a is supported in a suspended manner by the support portions 15b provided on the insulating member 15, the supporting state of the lightning arrester unit 20a is extremely stable, and the lightning arrester unit 20a is tilted by vibration and external contact. There is no possibility that the discharge gap will fluctuate.

FIG. 2 shows an insulator device B according to a second embodiment of the present invention. The insulator device B includes an insulator 10b,
It is composed of a lightning arrester unit 20b. The insulator 10b comprises a tie-top type insulator main body 11, a base fitting 12, and a pin fitting 13, similarly to the insulator 10a constituting the insulator device A of the first embodiment, and the base fitting 12 is provided at the lower end of the insulator main body 11. The pin metal 13 is fixed to the outer periphery via the cement 14, and the pin metal 13 is fixed to the base metal 12 and the cement 14 together with the base metal 12 in a state where the pin metal 13 is hung at the lower central portion of the base metal 12. The above configuration is the same as that of the insulator device A of the first embodiment.

The insulator 10a is provided with an insulating member 16 having a housing. The insulating member 16 includes a cylindrical covering portion 16 a and a bottomed cylindrical housing portion 16 b protruding from the outer periphery to one side, and a fitting groove portion 16 c provided on the lower surface side of the covering portion 16 a is formed at the upper end of the base fitting 12. It is fitted to the opening edge, is hooked on the opening edge, and is fixed to the insulator main body 11 by the cement 14. In this state, the insulating member 16
The covering portion 16a covers the outer periphery of the upper end portion of the base metal member 12, and shields the base metal member 12 from the power application unit side. The housing 16b of the insulating member 16 is located at the outer peripheral edge of the covering 16a and houses the lightning arrester 20b.

The lightning arrester unit 20b includes a non-linear resistor 21
, A pair of electrodes 22 and 23, and an insulating member 24 made of an elastic material such as rubber. Non-linear resistor 2
Reference numeral 1 denotes a zinc oxide-based resistor.
Are fixed to the upper and lower end faces of the nonlinear resistor 21. When accommodating the lightning arrester unit 20b in the accommodating portion 16b, an assembly in which the non-linear resistor 21 and the two electrodes 22, 23 constituting the lightning arresting unit 20b are integrated is accommodated in the accommodating portion 16b.
Insulation material such as rubber is filled and integrated in the state accommodated in b, and the filled insulation material constitutes the insulating member 24 of the lightning arrester unit 20b.

In the lightning arrester unit 20b, each electrode 2
The arc horns 22a and 23a are connected to the tip portions of the arc horns 2 and 23 via screws. The arc horn 22a protrudes toward the power application unit, and the arc horn 23a protrudes toward the ground unit. The insulator device B is disposed on the upper part of the pole like the insulator device A of the first embodiment, and the arm 3 protrudes in the lateral direction.
1, an electric wire 33 extending along the outer peripheral groove of the head of the insulator main body 11 is fixed to and supported by the insulator main body 11 by a bind wire 34. In this state, the arc horn 22a connected to the upper electrode 22 of the lightning arrester unit 20b forms a discharge gap G1 while maintaining a predetermined distance from the bind wire 34, and the arc horn 23a connected to the lower electrode 23 is a metal arm. The discharge gap G2 is formed while maintaining a predetermined distance from the discharge gap G1. The discharge gap G2
Instead of the arc horn 23a and the arm 3
Electrical connection may be made between the two.

In the insulator device B constructed as described above, when an impulse overvoltage is applied to the electric wire 33 due to the lightning surge, the lightning arrester unit 2 is provided similarly to the insulator device A of the first embodiment.
The action of 0b eliminates the shock overvoltage, then restores the resistance value, immediately interrupts the subsequent discharge, and restores insulation to the electric wire. Further, in the insulator device B, since the lightning arrester unit 20b is located below the insulator main body 11 and is isolated from the insulator main body 11 by the insulating member 16,
Even if the lightning arrester unit 20b is destroyed by an excessive lightning surge and a downstream arc is generated, the insulator main body 11 is not exposed to the downstream arc and the insulator main body 11 is not damaged. In addition, the lightning arrester unit 20 b is
Since the lightning arrester unit 20b is supported by being accommodated in the accommodating portion 16b provided in the light emitting device, the lightning arrester unit 20b is extremely stable, and there is no possibility that the discharge gap fluctuates due to tilting due to vibration and external contact.

[Brief description of the drawings]

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

FIG. 2 is a partially cutaway front view of the insulator device according to a second embodiment of the present invention.

[Explanation of symbols]

A, B: insulator device, 10a, 10b: insulator, 11: insulator body, 12: base fitting, 13: pin fitting, 15, 16
... insulating members, 15a, 16a ... covering parts, 15b ... supporting parts, 16b ... accommodating parts, 20a, 20b ... lightning arrester units,
21: Non-linear resistor, 22, 23 ... Electrode, 22a, 23
a: arc horn, 24: insulating member, 31: arm, 33
... electric wires, 34 ... bind wires.

Claims (2)

(57) [Scope of request for utility model registration] 1. A lightning arrester, comprising a non-linear resistor sandwiched between a pair of electrodes at both ends by an insulating member, is supported in parallel outside the insulator, and one of the electrodes of the lightning arrester is provided. In an insulator device provided with a lightning arrester having a discharge end protruding toward a power application section and a discharge end of the other electrode protruding toward a ground section, the base metal fitting is applied to a base metal constituting the insulator. An insulating member having a support portion that is insulated from the base portion and protrudes outside the base metal fitting, and the lightning arrester unit is supported on the supporting portion of the insulating member in a suspended manner to discharge the other electrode of the lightning arrester unit. An insulator device provided with a lightning arrester, characterized in that an end of the lightning arrester is projected toward the grounding portion, and a discharge end of one electrode of the lightning arrester is projected toward the power application portion through the insulating member. 2. A lightning arrester unit comprising a non-linear resistor sandwiched between a pair of electrodes at both ends by an insulating member is supported in parallel outside the insulator, and one of the electrodes of the lightning arrester unit is provided. In an insulator device provided with a lightning arrester having a discharge end protruding toward a power application section and a discharge end of the other electrode protruding toward a ground section, the base metal fitting is applied to a base metal constituting the insulator. An insulating member having an accommodating portion that is insulated from the outer side of the base member and that is located outside the base metal fitting; the accommodating unit is accommodated in the accommodating portion of the insulating member; An insulator device provided with a lightning arrester, characterized in that it protrudes toward the electric part and the discharge end of the other electrode protrudes toward the ground part.