JPH04301327A - Suspension type lighting insulator - Google Patents

Abstract

PURPOSE:To secure the weight balance without providing a weight balancing weight, reduce the whole weight, and reduce the number of parts. CONSTITUTION:Lightning insulator trains 7 each connected with multiple lightning insulators 6 in series are suspended and supported at both the right and left end sections of a ground side connecting yoke 5. An element storage section 22 is integrally formed at one place of each lightning insulator 6. A current limiting element 23 with nonlinear voltage-current characteristic is stored in the element storage section 22. The element storage sections 22 of a pair of lightning insulator trains 7 are arranged to be faced outward, and the element storage sections 22 are arranged at line-symmetrical positions via the center section between both lightning insulator trains 7.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] This invention relates to a suspended lightning insulator device in which a plurality of suspended lightning insulators having lightning arresting elements are connected in series to form a lightning arrester chain, and a pair of lightning arrester chains are provided in parallel. It is.

0002

2. Description of the Related Art In a conventional suspension type lightning arrester device of this type, two lightning arrester elements are provided on each insulator at two symmetrical positions. Then, one or both of the pair of insulator chains was composed of an insulator having a lightning arrester element.

0003

However, when one of a pair of insulator chains is constituted by an insulator having a lightning arrester element, the lightning arrester element is disposed unevenly with respect to both insulator chains, which causes problems in the device. Overall, a weight imbalance occurs. To solve this problem, weights are provided for weight balance. Therefore, the number of parts increases and the overall weight increases due to the extra weight.

[0004] Furthermore, if both insulator chains are constructed of insulators having lightning arresting elements, the balance can be maintained, but the overall weight increases. An object of the present invention is to provide a suspended lightning arrester device that can ensure weight balance without providing a weight for weight balance, and can reduce the overall weight and number of parts. be.

[0005]

[Means for Solving the Problems] In order to achieve the above object, in the present invention, a plurality of suspended lightning insulators each having a lightning arresting element are connected in series to form a lightning arrester chain, and a support arm of a steel tower is A pair of lightning arrester chains are supported in parallel at one end thereof on a grounding side connecting metal fitting suspended from the
A power-supplying side connecting fitting is provided between the other ends of the lightning arrester chain, and the power transmission line is supported on the power-supplying side connecting metal fitting, and the creeping flash of the lightning arrester chain is provided on the grounding side and power-supplying side connecting metal fittings. In a suspended type lightning arrester device equipped with an arcing horn for preventing arcing, the lightning arrester is provided at one location for each lightning arrester, and each lightning arrester of the both lightning arrester series is installed in the central part between both the lightning arrester series. It was placed in a line-symmetrical position via.

[0006]

[Operation] Therefore, according to the present invention, since the lightning arrester is provided at one location for each lightning arrester, the overall weight does not increase, and the lightning arrester is provided between the pair of lightning arresters. Since they are arranged in line-symmetrical positions across the center, weight balance can be ensured.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment embodying the present invention will be described below with reference to the drawings. As shown in FIG. 2, a hanging metal fitting 2 is fixed to the support arm 1 of the steel tower, and a ground side connecting yoke 5 is horizontally supported on the hanging metal fitting 2 via a connecting link 3 and a parallel clevis link 4. ing. The hanging fitting 2, the connecting link 3, the parallel clevis link 4, and the grounding side connecting yoke 5 constitute a grounding side connecting fitting R1. A lightning arrester chain 7 formed by connecting a plurality of lightning arrester insulators 6 in series is suspended from both left and right ends of the connection yoke 5, and a power-supplying side connection yoke 8 is disposed between the lower ends of both the lightning arrester series 7. connected. A power transmission line L is supported at the center of the connection yoke 8 via a connection link 9 and a wire clamp 10 . Then, the power supply side connection yoke 8 and the connection link 9
The electric wire clamp 10 constitutes a power-supplying side connecting fitting R2. Corresponding to each lightning arrester chain 7, arc horns 11 and 12 are supported on the ground side and energized side connection yokes 5 and 8, respectively, for preventing creeping flash of the lightning arrester chain 7. .

Next, the structure of each lightning arrester 6 constituting the lightning arrester series 7 will be explained. As shown in FIG.
is fixed by cement 18, and the large diameter portion of the upper end of the pin fitting 19 is fixed to the inner top part of the head 16 by cement 20. An engagement recess 17a is formed in the upper part of the cap fitting 17 to engage the lower end large diameter portion 19a of the pin fitting 19. By combining the plurality of lightning arresters 6, a plurality of lightning arresters 6 are connected in series to form a lightning arrester chain 7.

[0009] An element accommodating portion 22 is integrally formed at one location of the cap portion 21 of the insulator body 15. A current-limiting element 23 as a lightning protection element having non-linear voltage-current characteristics is housed in this element-accommodating portion 22.
is hermetically sealed by a ground side sealing electrode 24 and a power supply side sealing electrode 25 which are adhesively fixed to both upper and lower end surfaces of the element accommodating portion 22 . Furthermore, a ground side cap electrode 26 and a power supply side cap electrode 27 are caulked and fixed to the outer peripheral portions of both upper and lower ends of the element housing portion 22 . A grounding side conductive unit 28 and a charging side conductive unit 29 are provided between the grounding side sealing electrode 24 and the grounding side cap electrode 26 and between the charging side sealing electrode 25 and the charging side cap electrode 27, respectively. is interposed.

The ground side cap electrode 26 is connected to the cap metal fitting 17 by a lead wire 30, and both ends of the lead wire 30 are connected by a caulking pin 31 and a screw 32. Further, a lead wire 33 is connected between the power supply side cap electrode 27 and the pin fitting 19. That is, one terminal fitting 34 fixed to the lead wire 33 is fixed to the lower surface of the power-supplying side cap electrode 27 by the caulking pin 35, and the other terminal fitting 36 fixed to the lead wire 33
is attached to the lower end large diameter portion 19a of the pin fitting 19 by the screw 37.
attached to the side.

An arc guide 38 is supported horizontally on the cap metal fitting 17 in correspondence with the ground side cap electrode 26, and when the current limiting element 23 becomes conductive and an arc is emitted to the outside, the arc guide 38 can be turned outward. In the suspended type lightning arrester device configured as described above, lightning surge that has entered the pin fitting 19 of the lowermost lightning arrester 6 from the power transmission line L is transmitted through the lead wire 33, the voltage-carrying side cap electrode 27, and the voltage-carrying side conductive unit 29. , the current-side sealing electrode 25, the current limiting element 23, the grounding-side sealing electrode 24, the grounding-side conductive unit 28, the grounding-side cap electrode 26, the lead wire 30, and the flow to the cap fitting 17, and the lightning arrester located further above. It flows to the pin fitting 19 of the insulator 6 and is discharged to the ground. Furthermore, the subsequent current that occurs is suppressed and cut off by the restoration of the resistance value of the current limiting element 23, and ground faults based on the operating voltage are suppressed.

In this embodiment, as shown in FIGS. 1 and 2, a plurality of lightning arresters 6 are connected in series with each current limiting element 23 corresponding to the upper and lower sides to form a lightning arrester chain 7.
is configured. The element accommodating portions 22 of the pair of left and right lightning arrester series 7 are arranged so as to face each other outward. In other words, the element accommodating portions 22 are arranged in line-symmetrical positions with respect to the center portion between both the lightning arrester series 7.

Now, in the suspension type lightning arrester device of this embodiment, each lightning arrester 6 is provided with only one element accommodating portion 22 for accommodating the current limiting element 23.
By reducing the weight of each piece, the entire device can be made lighter, and the number of parts can be reduced to keep costs down. Moreover, even if the element housing part 22 is provided in only one place, each element housing part 22 of a pair of lightning arrester chains 7 may be arranged with each element facing outward, and the element housing part 22 can be placed between both lightning arrester chains 7. The weight balance of the device is ensured by arranging them in line-symmetrical positions with respect to the center of the device, and there is no need to provide weights for weight balance.

It should be noted that the present invention is not limited to the above-mentioned embodiment. For example, the element accommodating portions 22 of a pair of lightning arrester chains 7 may be arranged so as to face each other inwardly, or as shown in FIG. In addition, by making the cap 21 of the insulator body 15 into an elliptical shape, the weight of the insulator body 15 can be reduced, or as shown in FIG.
As shown in FIG. 4, the insulator body 15 may be further reduced in weight by reducing the diameter of the portion of the shade portion 21 in FIG. It is also possible to make specific changes by arbitrarily changing the configuration of each part.

[0015]

[Effects of the Invention] As detailed above, according to the present invention, weight balance can be ensured without providing weights for weight balance, and the overall weight can be reduced and the number of parts can be reduced. It has the excellent effect of being able to

[Brief explanation of drawings]

FIG. 1 is a schematic front view showing an embodiment of a suspended lightning arrester device embodying the present invention.

FIG. 2 is a front view showing the suspension type lightning arrester device in detail.

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

FIG. 4 is a schematic plan view showing another example of the invention.

FIG. 5 is a schematic plan view showing another example of the present invention.

[Explanation of symbols]

1 Support arm, 6 Lightning arrester, 7 Lightning arrester series, 11 Arc horn, 12 Arc horn, 23
Current-limiting element (lightning protection element), L power transmission line, R1 grounding side connection fitting, R2 power supply side connection fitting.

Claims (1)

[Claims] 1. A plurality of suspended lightning insulators each having a lightning arrester element are connected in series to form a lightning arrester chain, and a pair of the lightning arrester chains are connected to a grounding side connecting fitting suspended from a support arm of a steel tower. are supported in parallel at one end of the lightning arrester chain, and a power-supplying side connecting fitting is provided between the other ends of the lightning arrester series, and a power transmission line is supported on the power-supplying side connecting fitting, and the connecting fittings on the grounding side and the power-charging side are connected to each other. In a suspended lightning insulator device equipped with an arc horn for preventing creeping flash of a series of lightning arresters, the lightning arrester is provided at one location for each lightning arrester;
A suspended type lightning arrester device, characterized in that each lightning arrester element of the both lightning arrester series is arranged at a line-symmetrical position with respect to a center portion between both the lightning arrester series.