JPH0713127Y2 - Insulator mounting adapter for lightning protection horn insulator device - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) This invention promptly discharges an abnormally high voltage caused by a lightning strike to a power transmission line, and at the same time, causes a continuous current arc of the power transmission line to The present invention relates to a lightning protection insulator mounting adapter used in a lightning protection horn insulator device for preventing a ground fault accident.

(Prior Art) Generally, a lightning protection horn insulator device for a power transmission line supports a power transmission line at a lower end portion of a support insulator suspended at a tip end of a support arm of a steel tower, and from the suspension metal fitting to a discharge electrode on a power-supply side. On the other hand, a mounting adapter is supported by a cantilever on the intermediate portion of the supporting arm, and a voltage-
A lightning arrestor with a built-in current limiting element whose main characteristic is non-linear current characteristics, such as zinc oxide, is hung and fixed, and the electrode metal fitting at the lower end of the lightning arrestor is provided with a discharge electrode on the charging side and a predetermined value. The opposing discharge electrodes on the ground side are supported by the air discharge gap.

As shown in FIG. 8, the conventional mounting adapter 32 is formed in a flat plate shape, and the base end portion thereof is brought into contact with the lower surface of the angle member 1A constituting the support arm 1 and penetrated through the angle member 1A. The mounting adapter 32 was fastened and fixed to the angle member 1A by the bolt 31 inserted through the insertion hole 1n.

(Problems to be solved by the invention) However, in the conventional lightning protection horn insulator device,
Since the mounting adapter 32 was tightened and fixed by the bolts 31 that penetrate the angle material 1A, it is necessary to drill the angle material 1A with a drill prior to mounting the mounting adapter 32, which makes mounting work very troublesome. There was a problem that was. It was also very troublesome to change the position after mounting the one-end mounting adapter.

In addition, when the bolt insertion hole 1n is formed in the angle member 1A, the mechanical strength of the angle member 1A itself is reduced.
There is a problem that reinforcement is required when the weight of the product increases.

Furthermore, since the mounting adapter 32 is integrally formed, once the lightning protection insulator 11 is mounted, the angle cannot be adjusted, and there is a problem that the correspondence relationship between the discharge electrodes on the power-supply side and the ground side cannot be corrected. It was

In view of the above circumstances, a first object of the present invention is to mount an attachment adapter to a support arm of an existing lightning protection horn insulator device by omitting the work of forming a bolt insertion hole in an angle member that constitutes the support arm. An object of the present invention is to provide a mounting adapter capable of easily performing work, suppressing a decrease in strength of a support arm, and further easily changing a mounting position of a lightning protection insulator.

A second object of the present invention is, in addition to the first object, is to provide a mounting adapter capable of further freely setting the horizontal mounting position of the lightning protection insulator.

A third object of the present invention is to provide, in addition to the first object, a mounting adapter capable of correcting the twist of the support arm and setting the mounting position of the lightning protection insulator.

(Means for Solving the Problem) In order to achieve the first object, the mounting adapter of the lightning protection insulator according to claim 1 includes a fixed mounting plate that is in contact with an angle member that constitutes a support arm of a steel tower, Similarly, a locking metal fitting abutting against the angle member and tightened and fixed to the fixed mounting plate with a bolt is connected to the fixed mounting plate via angle adjusting means so that the horizontal mounting angle can be adjusted. And a movable mounting plate that is configured to be used.

In order to achieve the second object, the lightning protection insulator mounting adapter according to claim 2 is the insulator mounting adapter for the lightning protection horn insulator device according to claim 1, wherein the fixed mounting plate is displaced downward in the middle thereof. The means for connecting the movable mounting plate to the lower surface of the tip of the mounting plate so as to adjust the position in the horizontal direction is adopted.

The lightning protection insulator mounting adapter according to claim 3 is the insulator mounting adapter for the lightning protection horn insulator device according to claim 1, wherein a jack bolt is provided for the fixed mounting plate and the tightening metal fitting. Is adopted.

(Operation) In the mounting adapter according to the first aspect, it is not necessary to form the bolt insertion hole in the angle member forming the support arm, and therefore, the strength reduction of the angle member is suppressed, and the mounting work is easily performed. The mounting position of the adapter itself can be freely adjusted along the adapter.

Further, the angle adjusting means allows the horizontal mounting angle of the lightning protection insulator to be freely adjusted, and the air discharge gap between the discharge electrodes on the voltage application side and the ground side can be easily adjusted.

In addition to the function of the mounting adapter according to the first aspect, the mounting adapter according to the second aspect can adjust the position of the lightning protection insulator along with the movable mounting plate in the horizontal direction, and therefore, the adjustment of the air discharge gap is further facilitated. Becomes

The mounting adapter according to claim 3 corrects the twist of the support arm in addition to the function of the mounting adapter according to claim 1,
Since the vertical mounting angle of the fixed mounting plate can be adjusted, the lightning protection insulator can be set at a predetermined position and the air discharge gap can be easily adjusted.

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

As shown in FIG. 2, a support insulator 3 formed by connecting suspension insulators in series via an upper suspension fitting 2 is suspended from a support arm 1 of a steel tower, and a lower end portion of the support insulator 3 has a lower portion. A power transmission line 6 is installed via a hanging metal fitting 4 and an electric wire clamp 5. A horn-shaped charge-side discharge electrode 7 that discharges a lightning surge current is supported on the lower suspension metal fitting 4. Also, arcing horns 8 and 9 are attached to the upper and lower suspension metal fittings 2 and 4 to prevent the surface insulator from flashing.

On the other hand, as shown in FIG. 3, the lightning protection insulator mounting adapter 10 of the present invention is attached to one angle member 1A of the pair of left and right angle members 1A and 1B that constitute the support arm 1.
At the tip of the mounting adapter 10, a grounding side electrode fitting 12 located above the lightning protection insulator 11 incorporating a resistance element (not shown) having a non-linear voltage-current characteristic is fastened by bolts. A grounding side discharge electrode 14 facing the discharge electrode 7 with a predetermined air discharge gap G is supported on the electrode side metal fitting 13 at the lower end of the lightning protection insulator 11.

The mounting adapter 10 is an angle member as shown in FIG.
The fixed mounting plate 15 is in contact with the lower surface of 1A, and the hook portion 16a is locked to the upper edge of the vertical portion 1v of the angle member 1A. And metal fittings that are tightened and fixed by the nut 18
16, another tightening fitting 19 that contacts the upper surface of the horizontal portion 1h of the angle member 1A, and further contacts the upper surface of the tip of the fixed mounting plate 15 and is tightened and fixed by a bolt 20 and a nut 21. It is composed of a movable mounting plate 22. Then, the insertion holes 15a, 22a of the bolts 20 transparently provided in the fixed mounting plate 15 and the movable mounting plate 22 are formed as elongated holes that are oriented in directions orthogonal to each other, and the horizontal position of the movable mounting plate 22 with the bolts 20 loosened. The tilt angle (see FIG. 3) can be adjusted. In this embodiment, the elongated bolt insertion holes 15a and 22a, the bolt 20 and the nut 21 constitute an angle adjusting means for the movable mounting plate 22.

An arcing ring (not shown) is attached to the movable mounting plate 22 and the electrode fitting 13 in order to prevent a surface flashover of the lightning protection insulator 11.

Next, the operation of the lightning protection horn insulator device configured as described above will be described.

Now, when an abnormally high voltage caused by a lightning strike is applied to the transmission line, the current at this time is the electric wire clamp 5 and the lower hanging bracket 4.
Is discharged in the air gap G between the discharge electrodes 7 and 14 on the charging side and the grounding side, and is passed through the non-linear resistance element (not shown) built in the lightning arrestor 11 to the support arm 1 of the tower. Flowing.
Further, the subsequent arc generated thereafter is blocked by the air discharge gap G and the non-linear resistance element.

In particular, in this invention, the base end of the fixed mounting plate 15 is fixed to the angle member 1A by the locking metal fittings 16 and 19, the bolts 17 and the nuts 18, so it is not necessary to form a bolt insertion hole in the angle member 1A. Can also be mounted with the mounting adapter 10.
Therefore, the mounting operation of the mounting adapter 10 can be easily performed, and the reduction in strength of the angle member 1A can be suppressed, so that the angle member 1A can be applied to the existing support arm 1.

Further, since the mounting adapter 10 of the present invention is connected to the fixed mounting plate 15 by the movable mounting plate 22 so that the angle can be adjusted in the horizontal direction, the mounting position of the lightning protection insulator 11 is shown by the chain line in FIG. Can be easily adjusted, and as a result, the air discharge gap G between both discharge electrodes 7 and 14 can be easily adjusted.

In the embodiment of the invention according to claim 1, as shown in FIG. 5, the locking fittings 16 and 19 may be integrally connected at the upper part. Further, as shown in FIG. 6, a bolt 24 is fixed to the lower end edge of the locking metal fitting 16 and is tightened and fixed by a nut 25 in a state where the bolt 24 penetrates the fixed mounting plate 15 and projects downward. May be.

Next, an embodiment of the invention described in claims 2 and 3 will be described with reference to FIG.

In this embodiment, the jack bolts 26a and 26b are screwed on the lower surface of the base of the fixed mounting plate 15 and the upper surface of the fastening member 19, and the upper end of the bolt 26a is brought into contact with the lower surface of the angle member 1A to fix the fixed mounting plate 15 itself. The downward mounting angle of the mounting plate 15 is adjusted with the jack bolt 26b, and the tip of the mounting plate 15 is displaced so as to be located below the lower end of the bolt 26a. The movable mounting plate 22 is supported on the lower surface of the so that the position thereof can be adjusted in the horizontal direction.

In this embodiment, the movable mounting plate 22 can be horizontally adjusted by loosening the bolt 24 to adjust the horizontal position of the lightning protection insulator 11, and the jack bolts 26a, 26b can be used for fixed and movable mounting. Plates 15,22
The position of the lightning protection insulator 11 can be adjusted in the vertical direction by adjusting the position in the vertical direction.

In the present invention, as shown in FIG. 9, the support arm 1A may be clamped by angle-shaped tightening fittings 28, 29 and fixed by bolts 17 and nuts 18.

(Effects of the Invention) As described in detail above, the invention according to claim 1 omits the work of drilling the bolt insertion hole in the angle member forming the support arm, and supports the existing lightning protection horn insulator device. There is an effect that the mounting work of the mounting adapter can be easily performed, the strength reduction of the support arm is suppressed, and the mounting position of the lightning protection insulator can be easily changed.

In addition to the effect of the invention according to claim 1, the invention according to claim 2 has an effect that the horizontal mounting position of the lightning protection insulator can be set more freely.

Further, in addition to the effect of the invention according to claim 1, the invention according to claim 3 has the effect that the vertical mounting position of the lightning protection insulator can be set more freely.

[Brief description of drawings]

1 to 4 show an embodiment embodying the present invention, FIG. 1 is an exploded perspective view of a lightning protection insulator mounting adapter, and FIG.
FIG. 3 is a front view showing the entire lightning protection horn insulator device, FIG. 3 is a plan view of the lightning protection horn insulator device, FIG. 4 is a cross-sectional view showing an assembled state of the lightning protection insulator mounting adapter, and FIGS. FIG. 7 is a sectional view showing only an essential part of another example of the invention described in claim 1, FIG. 7 is a sectional view showing an embodiment of the invention described in claims 2 and 3, and FIG. 8 is a sectional view showing a conventional example. The figure is a sectional view showing another example of the present invention. 1 ... Support arm, 1A ... Angle material, 1v ... Vertical part,
1h: Horizontal part, 10: Lightning arrester mounting adapter, 11: Lightning arrester, 15: Fixed mounting plate, 15a, 22a: Bolt insertion hole, 16: Locking metal fitting, 17, 20, 24 ... Bolts, 18,21,
25 …… Nut, 19 …… Tightening fitting, 22 …… Movable mounting plate, 26a, 26b …… Jack bolt.

Claims (3)

[Scope of utility model registration request] 1. A fixed mounting plate (15) which is in contact with an angle member that constitutes a support arm (1) of a steel tower, and a fixed mounting plate (15) which is also in contact with the angle member (1A). A movable mounting plate which is connected to the locking metal fitting (16) tightened and fixed by a bolt (17) and the fixed mounting plate (15) through an angle adjusting means so that the horizontal mounting angle can be adjusted. (22) An insulator mounting adapter for a lightning protection horn insulator device, characterized in that 2. The insulator mounting adapter for the lightning protection horn insulator device according to claim 1, wherein said fixed mounting plate (15).
An insulator mounting adapter for a lightning protection horn insulator device, wherein a movable mounting plate (22) is connected to the lower surface of the tip of the mounting plate so that the position can be adjusted in the horizontal direction. 3. The insulator mounting adapter for the lightning protection horn insulator device according to claim 1, wherein the fixed mounting plate (15).
And jack bolts (26a, 26b) for the tightening fitting (19)
An insulator mounting adapter for a lightning protection horn insulator device, characterized by being provided with.