JP2504335Y2 - Lightning arrester for power lines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a lightning arrester used for an overhead power transmission line.

[Prior Art] An overhead transmission line is attached to a support arm of a support structure via a transmission line tension device, and arc horns are provided before and after an insulator string of the transmission line tension device against lightning surge voltage generated during a lightning strike. I try to cause an air-and-wire communication between each other. The arc current generated due to this air flashing is interrupted by a power plant breaker or breaker, and power transmission is continued by reclosing the breaker or breaker. However, due to a momentary power loss due to a shii
For example, there are problems such as computer stoppage and disruption of production, and as a remedy for this problem, a lightning arrester for a power transmission line as shown in FIGS. 4 and 5 has been proposed (actual application).
62-65878). This is fixed by a fixing member 53 to the lower surface of the power transmission line tension device mounting bracket 52 at the tip of the support arm 51. On this fixing member, a jumper wire support device 54 is hung vertically on the support arm 51 side, and a lightning arrester 55 is hung on the other end, and a conductor side horn electrode 56 of the jumper wire support device and a horn electrode 57 of the lightning arrester are provided. A predetermined air gap 58 is secured by and. Jumper wire between the strain clamps 61, 61 of both transmission line tension devices 60, 60 stretched at both ends of the transmission line tension device mounting bracket 52.
62 is gripped by the jumper wire gripping portion 59 of the jumper wire supporting device 54, and when a high overvoltage is applied between the electric wire and the tower arm 51 due to a lightning strike, it is discharged in the air gap 58, and the lightning arrester 55 is non-linear. Because the voltage is limited by the resistance characteristic and the follow-up current is suppressed to an extremely small value, the follow-up current is blocked by the air gap 58 and returns to the original state. Therefore, it is possible to eliminate the above-mentioned problems caused by the instantaneous blackout.

[Problems to be solved by the device]

However, in the conventional lightning arrester for power transmission lines, the jumper wire support device 54 and the lightning arrester 55 are set in a state of protruding for a predetermined length from the tip of the support arm 51, so that if the horizontal angle of the power transmission line changes, the existing jumper If the length of the wire 62 is not changed, it may not be possible to mount the jumper wire support device 54. That is, the fifth angle in which the horizontal angle of the transmission line is zero.
The ones shown in FIGS. 5 (b) and 5 (b) 'are not problematic because the jumper wire support device 54 is located near the existing jumper wires 62, but FIGS. 5 (a) and 5 (a)' take a horizontal angle. In FIGS. 5 (c) and 5 (c) ′, since the distance between the existing jumper wire 62 and the jumper wire support device 54 is too large, the existing jumper wire 62 must be gripped within the allowable catenary angle range. ,
The jumper wire 62 ', which is an extension of the existing jumper wire 62, must be used. For this reason, a complicated jumper wire connection work is performed using a split line, a compression sleeve, a compression tool, and the like, which is a disadvantage in that much time and labor are consumed.

Therefore, an object of the present invention is to provide a lightning arrester for a power transmission line, in which the jumper wire can be easily attached without changing its length even when the power transmission line has a horizontal angle.

[Means for solving the problem]

In order to achieve this object, in the lightning arrester for a power transmission line of the present invention, a jumper wire support device and a lightning arrester are installed at a predetermined interval on the lower surface of a fixing member fixed to a support arm of a support structure. In the above, the fixing member mounting seat is provided on the intermediate mounting member attached to the support arm, a plurality of elongated holes are formed in the fixing member in the longitudinal direction, and these elongated holes are inserted into the fixing member mounting seat of the intermediate mounting member. The fixing member is detachably attached to the intermediate mounting member by a bolt and a nut screwed with the bolt.

It is preferable that the insulator of the jumper wire supporting device is a long insulator.

[Action]

When the jumper wire support device 7 of the power transmission line lightning arrester 3 attached to the support arm 1 is separated from the jumper wire 28, the bolt 20, which attaches the fixing member 4 to the fixing member attachment seat 19 of the intermediate fixture 5, The nut 21 is slightly loosened to move the fixing member 4 in the longitudinal direction, and the jumper wire supporting device 7 moves the jumper wire 28.
The bolt 20 and the nut are returned to the original tightening at a position close to and the fixing member 4 is fixed to the fixing member mounting seat 19, and the jumper wire is attached to the jumper wire supporting device 7. That is, with the power transmission line lightning arrester 3 attached to the support arm 1,
You can install jumper wires without changing the length of 28.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings. Fig. 1 ~
In FIG. 3, 1 is a support arm of a support tower, 2 is a transmission line tension device mounting bracket fixed to the lower surface of the tip of the support arm 1, and 3 is a support arm 1 via a transmission line tension device mounting tool 2. It is a lightning arrester for power transmission lines attached to.

The transmission line lightning arrester 3 includes a fixing member 4 and an intermediate mounting member 5 for removably attaching the fixing member to the support arm 1.
And a jumper wire support device 7 attached to the lower surface of the fixing member 4.
And a zinc oxide type lightning arrester 8. Jumper wire support device 7
Consists of a long insulator 9 whose upper end is attached to the lower surface of one end of the fixing member 4, a horn electrode 10 attached to its lower end, and a jumper wire gripping tool 11 which is attached below it. The zinc oxide type arrester 8 has a current limiting arc horn body 12 whose upper end is attached to the lower surface of the other end of the fixing member 4 and a horn electrode which is attached below it.
This horn electrode is composed of 13 and is opposed to the horn electrode 10 of the jumper wire supporting device 7 with a predetermined air discharge gap 14.

The intermediate mounting member 5 is provided with projecting support arm mounting seats 16 having bolt holes on both upper ends of the main body, and projecting fixing member mounting seats 19 having bolt holes on both lower end sides. It abuts the lower surface of the transmission line tension device mounting bracket 2 and is detachably attached to the tip of the support arm 1 with 6 sets of bolts 17 and nuts 18, and 4 sets of bolts 20 and nuts are provided on the fixing member mounting seat 19. The fixing member 4 is detachably attached at 21. As shown in FIG. 2, the fixing member 4 is provided with two elongated holes 22 through which the bolts 20 are inserted side by side, and these elongated holes 22 and 22 and the fixing member mounting seat 19 of the intermediate mounting member 5 are provided. By fixing the bolts and nuts that have been inserted through to the intermediate mounting member 5 and loosening the bolts and nuts slightly, the support arms 1 can move in the longitudinal direction.

3 (b) and 3 (b) ′ show transmission line tension devices 25, 25 connected to the transmission line tension device mounting bracket 2 on the lower surface of the tip of the support arm 1 and transmission lines 26, 26 having a horizontal angle of zero. Shows the state of being stretched. In this case, the tension clamps 27,2
Since the distance between the straight line 29 connecting 7 and the jumper wire supporting device 7 is narrow, the jumper wire supporting device 7 can grip the jumper wire 28 within the allowable catenary angle range. The one shown in (a) and (a) 'of Fig. 3 has a straight line 29 connecting the detention clamps 27, 27 of both transmission line tensioning devices 25, 25 for stretching the transmission lines 26, 26 having a horizontal angle. Since it is near the steel tower body 30, the fixing member 4 is pulled toward the steel tower body 30 side, and the jumper wire supporting device 7 fixes the jumper wire 28 to the support arm 1 at a position where it can be grasped within the allowable catenary angle range. .
Further, in the structure shown in FIGS. 3 (c) and 3 (c) ', the straight line 29 connecting the detention clamps 27, 27 is largely deviated from the tip of the support arm 1 to the outside, so that the lightning arrester 8 is located near the tower main body 30. The fixing member 4 thus taken out is projected to the opposite side of the tower main body 30, and the jumper wire supporting device 7 fixes the jumper wire 28 to the supporting arm 1 at a position where it can be grasped within the allowable catenary angle range.

In the fixing member setting position adjustment work described above, the fixing member 4 is supported by the supporting arm 1 by slightly loosening the bolts and nuts that fasten the fixing member mounting seat 19 of the intermediate mounting member 5 fixed to the supporting arm 1 and the fixing member. Since it can be moved in the longitudinal direction while being supported, the set position of the fixing member 4 can be easily adjusted.

[Effect of device]

As described above, according to the present invention, the setting position of the fixing member in the longitudinal direction can be adjusted with the support arm supporting the transmission line lightning arrester, so that the transmission line has a horizontal angle. However, the jumper wire can be installed very easily without changing the length of the jumper wire. Therefore, there is an advantage that it can be easily applied to an existing support structure.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a partially cutaway bottom view of a fixing member to which a bolt is attached, and FIG. 3 is an explanation of a lightning arrester installation method of the present invention when the horizontal angle of a transmission line is different. FIG. 4 is a front view of a conventional product, and FIG. 5 is an explanatory diagram of a conventional product installation method when the horizontal angle of the power transmission line is different. 1 ... Support arm, 4 ... Fixing member, 5 ... Intermediate mounting bracket, 7 ... Jumper wire support device, 8 ... Lightning arrester, 9 ...
Long stem insulator, 16 …… Support arm mounting seat, 19 …… Fixing member mounting seat, 22 …… Long hole.

Claims (2)

(57) [Scope of utility model registration request] Claim: What is claimed is: 1. A jumper wire support device and a lightning arrester are installed on a lower surface of a fixing member fixed to a supporting arm of a supporting structure at a predetermined interval, and the fixing member is fixed to an intermediate mounting member attached to the supporting arm. A mounting seat is provided, a plurality of elongated holes are formed in the fixing member in the longitudinal direction, and the bolts inserted into these elongated holes and the fixing member mounting seat of the intermediate mounting bracket and the nuts screwed into the intermediate mounting bracket A lightning arrester for a power transmission line, wherein a fixing member is detachably attached to the. 2. The lightning arrester for a transmission line according to claim 1, wherein the insulator of the jumper wire support device is a long insulator.