JPH07107866B2 - Lightning arrester unit mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) When a power transmission line is hit by a lightning stroke, the present invention promptly discharges them to the ground by a lightning protection function and suppresses and interrupts a follow-up current to make them permanent. The present invention relates to a lightning arrester unit mounting structure capable of preventing a ground fault.

(Prior Art) In general, as the voltage of the transmission line becomes higher, the lightning arrester unit provided corresponding to the discharge electrode on the power supply side attached to the transmission line side also becomes larger in diameter and length, and the weight also increases. Therefore, even in a severe situation where the insulator device sways under strong wind, in order to ensure sufficient insulation clearance between the discharge electrode attached to the arrester unit and the support arm or steel tower, the mounting bracket that supports the unit is also supported. It will be necessary to project from the arm to the outside for a long time. The mounting structure of this lightning arrester unit on a steel tower will be described with reference to FIG.
The upper end of the arrester unit 17 is tightened and fixed to the lower surface of the mounting bracket 31 with bolts 19 in parallel with. In the figure, reference numeral 5 is a suspension insulator string for supporting the power transmission line 8, and reference numerals 22 and 23 are discharge electrodes on the charging side and the grounding side.

(Problems to be Solved by the Invention) However, the mounting structure of the conventional lightning arrester unit 17 is
Since the mounting bracket 31 is fixed at a predetermined position, when the worker mounts, removes, or performs maintenance / inspection work on the arrester unit 17, it is necessary to perform it at the tip of the narrow mounting bracket 31. Not only bad sex,
There was also a problem in terms of safety.

Configuration of the Invention (Means for Solving the Problems) In order to solve the above problems, the present invention mounts a mounting bracket on a support arm of a steel tower, and uses a rotation mounting adapter for the mounting bracket. It is connected to the retracted position displaced to the supporting arm side so as to be capable of reciprocating rotation, the grounding side electrode metal fitting of the lightning arrester unit is attached to the rotation mounting adapter, and further between the mounting bracket and the rotation mounting adapter. Is provided with locking means for locking the rotary mounting adapter in the use position, and further, a stopper for stopping the rotary mount adapter in the use position is provided in the mounting bracket, and the rotary mount adapter is provided with the stopper. The means of providing a locking hook capable of locking the tip of the operating rod for rotating the.

(Operation) The present invention operates as follows by adopting the above means.

Since the rotation mounting adapter is supported on the tip of the mounting bracket, it is possible to mount or remove the arrester unit.
Alternatively, at the time of maintenance / inspection work, by unlocking the locking means and rotating the rotary mounting adapter from the use position to the retracted position, each of the above-mentioned works can be performed quickly and safely on the support arm side. it can.

Further, according to the present invention, the tip of the operating rod is locked to the locking hook of the rotary mounting adapter in the retracted position, and the operation of rotating the adapter toward the use position can be easily performed. When the mounting adapter is moved to the use position, the position of the adapter is regulated by the stopper, so that the work of stopping the adapter at the use position can be performed reliably and quickly.

(Embodiment) An embodiment embodying the present invention will be described below with reference to FIGS. 1 to 3.

As shown in FIG. 3, a connecting metal fitting 3 is fixed to the support arm 2 of the steel tower 1, and a suspension insulator string 5 is swingable to the connecting metal fitting 3 via a hanging metal fitting 4 in the line direction and the orthogonal direction. Supported by. A suspension metal fitting 6 is provided at the lower end of the suspension insulator string 5.
The transmission line 8 is supported via the electric wire clamp 7.

A mounting bracket 9 is fixed by bolts near the tip of the support arm 2 at a predetermined distance from the suspension insulator string 5. A rotary mounting adapter 10 is supported on the tip of the mounting bracket 9 by a supporting shaft 11 so as to be rotatable in the horizontal direction. A reinforcing plate 12 is joined and fixed to the base end of the rotary mounting adapter 10. The rotation mounting adapter
When 10 is in the use position shown by the solid line in FIG. 2, the bolt 13 as a locking means inserted through the bolt insertion holes 9a, 10a (see FIG. 1) provided through the mounting bracket 9 and the rotary mounting adapter 10. And the nut 14 for tightening.

A stopper 15 for stopping the adapter 10 at the use position when the rotation attachment adapter 10 is rotated from the retracted position shown by the chain line in FIG. 2 to the use position is supported at the tip of the mounting bracket 9. Has been done. Further, a short-circuit lead 16 made of a flexible stranded wire is connected between the mounting bracket 9 and the rotary mounting adapter 10 so as to ensure electric conduction between the both.

A current limiting element (not shown) mainly made of zinc oxide having a non-linear voltage-current characteristic is provided at the tip of the rotary mounting adapter 10.
A lightning arrester unit (17) having a built-in is fixed by a bolt (19) with a ground side electrode metal fitting (18) located at the upper end thereof.

Further, a locking hook 20 for locking an operating rod (not shown) when the rotary mounting adapter 10 is reciprocated between the use position and the retracted position is provided on the side wall of the tip of the rotary mounting adapter 10. It is fastened.

On the other hand, as shown in FIG. 3, the projection 21a integrally formed on the lower surface of the power-supply-side electrode fitting 21 of the lightning arrester unit 17 has a predetermined discharge electrode 22 and the discharge-side electrode 22 attached to the suspension fitting 6. The discharge electrodes 23 on the ground side facing each other with the air gap G in between are attached.

An arcing ring (not shown) is provided on the grounding side and the charging side electrode fittings 18 and 21 of the lightning arrester unit 17 to reduce damage when the rubber mold 24 flashes over the surface.

Next, the operation of the transmission line lightning arrester configured as described above will be described.

Now, when a lightning surge is applied to the power transmission line 8, this current is discharged from the discharge electrode 22 through the wire clamp 7 and the hanging metal fitting 6 to the discharge electrode 23 through the discharge gap G, and the surge arrester unit 17 is charged with electricity. It flows from the electrode metal fitting 21 through the current limiting element (not shown) of the arrester unit 17 to the ground side electrode metal fitting 18 and then from the rotary mounting adapter 10 to the mounting bracket 9 via the short-circuit lead 16 and further to the supporting arm 2 and the steel tower. It flows to 1 and is discharged to the ground. The subsequent current generated thereafter is suppressed and cut off by the current limiting element (not shown).

By the way, in order to mount the lightning arrester unit 17 on the support arm 2, first, the mounting bracket 9 is fixed to the support arm 2, and then the rotary mounting adapter 10 is first mounted on the mounting bracket 9 without mounting the lightning arrester unit 17. As indicated by the chain line in the figure, the support shaft 11 supports the support arm 2 in a displaced state. Next, the lightning arrester unit 17 is attached to the tip of the rotary mounting adapter 10, and the rotary mounting adapter 10 is attached.
1 together with the arrester unit 17 by an operating rod (not shown) about the support shaft 11 in the clockwise direction of FIG. 1 to move to the use position shown by the solid line in FIG.
Then, the mounting bracket 9 and the rotary mounting adapter 10 are tightened and fixed with the nut 14. In this way, the mounting of the mounting bracket 9, the rotary mounting adapter 10, and the lightning arrester unit 17 to the support arm 2 is completed.

When the lightning arrester unit 17 is to be removed, or to be inspected or repaired, the procedure can be performed in the reverse order of the mounting work described above.

As described above, in the embodiment of the present invention, since the rotary mounting adapter 10 is attached to the mounting bracket 9 so that the position can be switched between the use position and the retracted position, an operator on the support arm 2 side can attach or detach the lightning arrester unit 17 or perform maintenance. -Inspection work can be performed quickly and safely.

The present invention can also be embodied as follows.

(1) An operation string (not shown) for displacing the rotary mounting adapter 10 from the use position to the retracted position is fixed to the locking hook 20.

(2) Although not shown, the rotation mounting adapter 10 should be rotatable by a motor.

(3) Insert a thrust bearing (not shown) between the mounting bracket and the rotary mounting adapter.

EFFECTS OF THE INVENTION As described in detail above, according to the present invention, the lightning arrester unit is attached to or detached from the support arm of the steel tower, or maintenance or
The inspection work can be performed quickly and safely, and the management cost can be reduced.

In particular, in the present invention, since the position of the rotary mounting adapter can be quickly switched between the retracted position and the use position, and the position of the adapter is regulated by the stopper,
The work of stopping the adapter in the use position can be performed reliably and quickly.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a mounting structure of a lightning arrester unit of the present invention, FIG. 2 is a plan view showing a mounting structure of the lightning arrester unit, FIG. 3 is a front view showing a mounted state of the lightning arrester unit, and FIG. FIG. 6 is a plan view showing a conventional lightning arrester unit mounting structure. 1 ... Tower, 2 ... Support arm, 9 ... Mounting bracket, 10 ... Rotating mounting adapter, 9a, 10a ... Bolt insertion hole, 11 ... Support shaft, 13 ... Bolt as locking means, 14
...... Nut as locking means, 15 ...... Stopper, 16 ......
Short-circuit lead, 17 ... Lightning arrester unit, 18 ... Grounding side electrode fitting, 20 ... Locking hook, 21 ... Power charging side electrode fitting.

Claims (4)

[Claims] 1. A mounting bracket is attached to a support arm of a steel tower, and a rotation mounting adapter is connected to the mounting bracket so as to be reciprocally rotatable between a use position and a retracted position displaced to the support arm side. , The grounding-side electrode metal fitting of the lightning arrester unit is attached to the rotary mounting adapter, and locking means for locking the rotary mounting adapter in a use position is provided between the mounting bracket and the rotary mounting adapter. Further, the mounting bracket is provided with a stopper for stopping the rotary mounting adapter at a use position, and the rotary mounting adapter is provided with a locking hook capable of locking the distal end portion of the operation rod for rotating the adapter. Installation structure of lightning arrester unit characterized by being provided. 2. The lock means comprises a bolt penetrating through a bolt insertion hole provided through the mounting bracket and the rotary mounting adapter, and a nut screwed to the bolt. Arrangement structure of the arrester unit described in paragraph. 3. The lightning arrester unit mounting structure according to claim 1, wherein the mounting bracket and the rotary mounting adapter are connected by a short-circuit lead wire for energizing the both. 4. The lightning arrester unit mounting structure according to claim 1, wherein an operation cord for switching the rotation mounting adapter from the use position to the retracted position is fixed to the locking hook.