JPH0654622B2 - Lightning protection horn insulator device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a lightning protection horn insulator device, and more specifically, it can stably support a lightning arrester insulator, and also makes the entire device lighter and smaller in size, thereby providing a lightning arrester insulator. The present invention relates to a lightning protection horn insulator device capable of stabilizing the mounted state of the column.

(Prior Art) Generally, when a lightning surge voltage is applied to a power transmission line, a lightning protection horn insulator device for a power transmission line is proposed, which quickly discharges the surge current and cuts off the subsequent current that occurs to prevent a ground fault. Has been done. Conventionally, as shown in FIG. 9, as this device, a connecting fitting 31 is fixed to a supporting arm 1 of a steel tower with bolts, and an upper horn mounting fitting 33 is supported on the connecting fitting 31 via a U clevis link 32. A suspension insulator string 10 formed by connecting a large number of suspension insulators 9 in series is suspended from the mounting bracket 33, and the lower horn mounting bracket 11 and an electric wire clamp 12 are used at the lower end of the suspension insulator string 10 to transmit a power line. 13 are supported.

On the other hand, the mounting adapter 3 is attached to the upper horn mounting bracket 33.
4 is fixed by a bolt, and the mounting adapter 34 has
An arc horn 20 on the side of voltage application, which is attached to the lower horn mounting member 11, supported by a lightning protection insulator 16 having a built-in current limiting element mainly composed of zinc oxide whose voltage-current characteristics are non-linear.
And a grounding side arc horn 19 attached to the lightning protection insulator 16.
A predetermined air discharge gap G is provided between and.

Further, the horn mounting member 33 is provided with a device for canceling the moment of the lightning protection insulator 16 by changing the vertical position of the connection point between the connecting member 31 and the suspension insulator string 10, and the surface flash of the suspension insulator string 10. Arc horn 3 to prevent entanglement
5 is installed.

(Problems to be Solved by the Invention) However, in the conventional mounting structure of the lightning arrester insulator 16, when the power transmission line 13 of the suspension insulator string 10 swings or when water is generated on the power transmission line, the suspension insulator string is connected. Suspension load changes,
Therefore, there is a problem in that the lightning protection insulator 16 changes its position, and it is difficult to stably maintain the mounted state of the pillar, and there is a limit to its application.

In the unlikely event that the power transmission line 13 is cut off and the suspension insulator string 10 rotates in the counterclockwise direction in FIG. 9 around the upper connecting pin 36, the suspension insulator string 10 collides with the lightning arrester insulator 16. There is a fear that not only the lightning protection insulator 16 may be destroyed, but also the suspension insulator string 10 itself may be damaged to induce its fall.

Although not shown, there is also a mounting structure in which the lightning insulator is mounted on the support arm via a mounting adapter, but it is necessary to prepare a dedicated mounting adapter or form a bolt insertion hole for mounting on the support arm. Troublesome work such as occurrence was required.

The object of the present invention is to be able to stably support a lightning protection insulator, to be widely applied without being influenced by the usage conditions, and to be easily installed and installed. An object of the present invention is to provide a lightning protection horn insulator device capable of preventing the destruction of the insulator and the suspension insulator string and improving safety.

(Means for Solving the Problem) In order to achieve the above-mentioned object, the lightning protection horn insulator device of the present invention supports a hanging metal fitting so as to be rotatable only in one direction with respect to a support arm of a steel tower via a mounting metal fitting. Then, a connection link is supported by the suspension fitting so as to be rotatable in a direction orthogonal to the rotation direction of the suspension fitting, and a power transmission line is suspended on the connection link via a support insulator. Similarly, an attachment adapter is connected to the hanging metal fitting so that it can be held at a predetermined position laterally extended by a stopper provided on the hanging metal fitting and can be pivoted upward by the pivotal movement of the coupling link. , The mounting adapter is equipped with a lightning arrester having a current limiting element having a non-linear voltage-current characteristic, and the rotation axis of the hanging metal fitting and the central axis of the lightning arrester are located in substantially the same vertical plane. And the power-supply-side arm provided on the transmission line side. Khon,
The means for facing the arc horn on the ground side provided at the tip of the lightning insulator with a predetermined air discharge gap is adopted.

(Operation) In the lightning protection horn insulator device of the present invention, when the lightning protection insulator is stationary, the rotation axis of the hanging metal fitting and the central axis of the lightning protection insulator are located in the same vertical plane, so that the mounting state is stabilized.
Further, even if the power transmission line swings due to wind pressure or the like and the support insulator swings in any direction, the suspension metal fitting and the lightning protection insulator are rotated in one direction, so a large inertial force acts on the lightning protection insulator. The strength of the mounting metal fittings and the hanging metal fittings is reduced, and the discharge gap length is kept constant by appropriately selecting the shapes of the arc horns on the power supply side and the grounding side. Even if the support insulator is suddenly flipped up around the upper suspension point due to disconnection, the mounting adapter is rotated in the same direction by the connecting link and the lightning protection insulator is rotated upward. , The collision of the support insulator with the lightning protection insulator is prevented, and the damage to humans due to the damage and the fall of both insulators is suppressed in advance.

(Embodiment) An embodiment embodying the present invention will be described below with reference to FIGS. 1 to 5.

As shown in FIGS. 1 to 3, a mounting bracket 2 is fixed to a tip of a supporting arm 1 mounted on a steel tower by a bolt 3, and three bearing parts 2a, 2 integrally formed on the mounting bracket 2 are provided.
Between the b and 2c, a pair of protrusions 4a and 4b integrally formed on the upper part of the hanging metal fitting 4 are connected in one direction (in this embodiment, in the horizontal direction orthogonal to the line direction P in FIG. 3) by the connecting pin 5A. Is rotatably supported. A connecting link 6 is inserted into the inside of mounting portions 4c and 4d which are integrally formed in a bifurcated shape so as to be orthogonal to the protruding portions 4a and 4b with respect to the lower half portion of the hanging fitting 4, and the line is connected by the connecting pin 5B. It is rotatably connected in the direction P.

A horn mounting member 7 is rotatably connected to the connecting link 6 by a connecting pin 5C in a direction orthogonal to the line, and a ball clevis 8 is connected to the horn mounting member 7 in a line direction by a connecting pin 5D. A suspension insulator series 10 as a support insulator formed by connecting a large number of suspension insulators 9 in series to the ball clevis 8 is suspended so as to be swingable in the line direction and the same orthogonal direction, and the suspension insulator series 10 is connected. At the lower end of the power transmission line 13 through the horn mounting bracket 11 and the electric wire clamp 12.
Is supported.

As shown in FIGS. 1 and 2, a base end portion 14a of a mounting adapter 14 for a lightning protection insulator 16 is provided on both side surfaces of the suspension fitting 4.
Are rotatably supported by the connecting pin 5B.
The base end portion 14a is brought into contact with a stopper 4e integrally formed on the side surface of the hanging fitting 4 so as to be able to hold the mounting adapter 14 at a position laterally protruding as shown in FIG. . A stopper 14b is connected and fixed between the base ends 14a of the mounting adapters 14 as shown in FIG. 2, and when the connecting link 6 is rotated counterclockwise in FIG. 14b is pushed in the same direction by the connecting link 6, so that the mounting adapter 14 moves the connecting pin 5
It is designed to be rotated in the same direction around B.

On the lower surface of the tip of the mounting adapter 14, a lightning protection insulator 16 is suspended and fixed by bolts with an electrode fitting 17 on the ground side thereof. The center line O1 of the lightning protection insulator 16 is located in a vertical plane passing through the rotation axis O2 of the hanging fitting 4. Further, as shown in FIG. 3, the grounding side arc horn 19 is supported by the electrode metal fitting 18 on the charging side at the lower end of the lightning protection insulator 16.

On the other hand, the horn mounting bracket 11 cantilever-supports an arc horn 20 on the power-supply side in the direction of the line with a bolt, and a predetermined air discharge gap G is provided between the arc horn 20 and the arc horn 19. Is provided.

The lightning protection insulator 16 includes a pressure-resistant insulating cylinder (not shown) formed in a cylindrical shape by a tension-resistant material such as FRP, and zinc oxide (ZnO) housed therein, which has a non-linear voltage-current characteristic.
A current limiting element (not shown) whose main component is, the cap-shaped electrode fittings 17 and 18 on the power-supply side and the grounding side, which are fitted and fixed to both ends of the pressure-proof insulating cylinder, and the pressure-proof insulating cylinder. It is formed by the rubber mold 21 provided on the outer periphery.
It should be noted that arcing rings 22 and 23 are provided on both of the electrode fittings 17 and 18 of the lightning protection insulator 16 to reduce damage when the rubber mold 21 is flashed on the surface.

On the other hand, the horn mounting brackets 7 and 11 are provided with a suspension insulator string 1
The arcing horns 24A, 24B, 25 for reducing the damage of the surface flashover of No. 0 are attached. Right arc horn 24A mounting portion 24a, mounting bracket 7 mounting portion 7a
However, in order to prevent the suspension insulator 10 from colliding with the horizontal portion 14c of the mounting adapter 14 due to the swing of the suspension insulator series 10 in the line direction (right direction in FIG. 1), the mounting portion 7a of the mounting bracket 7 is omitted, and The mounting portion 24a of the arc horn 24A can be fixed to the horizontal portion 14c.

Further, the left arc horn 24B may be integrally formed with the connecting link 6 so that the horn mounting member 7 and the ball clevis 8 are integrated to shorten the connecting length.

The horizontal axis of the mounting adapter 14 should be set slightly upward so that rainwater from the support arm 1 does not flow into the discharge gap G of the lightning protection insulator 16.

As shown in FIG. 3, the connecting pin 5B, which is the center of rotation of the suspension insulator series 10, and the arc horn 1 on the charging side and the grounding side.
A line connecting the respective tip portions of 9 and 20 is a straight line L, and when the suspension insulator 10 swings in the line direction P around the connecting pin 5B, the fluctuation of the discharge gap G is minimized. I am trying to become.

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

Now, when a surge current due to a lightning strike flows through the power transmission line 13, this current is flashed over from the arc horn 20 to the arc horn 19 through the horn mounting bracket 11, and the lightning arrester 1
6. Passing through the current limiting element built in 6, mounting adapter 14,
It flows to the support arm 1 through the hanging metal fitting 4 and the mounting metal fitting 2,
It is discharged to the earth. The subsequent current generated thereafter is suppressed and cut off by the current limiting element (not shown) and the discharge gap G, and a ground fault is prevented.

Now, in the embodiment of the present invention, the hanging metal fitting 4 is attached to the mounting metal fitting 2.
This pendant is supported so that it can rotate only in the direction orthogonal to the track.
The lightning protection insulator 16 is mounted on the mounting bracket 14 via the mounting adapter 14, and the rotation axis O2 of the suspension fitting 4 and the central axis O1 of the lightning protection insulator 16 are attached.
Since they are located in the same vertical plane, no eccentric load is applied to the mounting bracket 2, the connecting pin 5A and the mounting adapter 14, and the lightning protection insulator 16 shakes even if the suspension insulator series 10 swings in the track direction. The lightning protection insulator 16 can be stably held without moving.

Further, by setting the arc horn 20 outside the arc horn 19 and setting the line connecting the tips of both arc horns 19 and 20 and the connecting pin 5B to be a straight line L, the discharge gap length changes. Can be minimized.

Further, when the suspension insulator series 10 swings in the direction orthogonal to the line, the hanging metal fitting 4 is rotated in the same direction around the connecting pin 5A, and the lightning protection insulator 16 is rotated accordingly. Due to the weight of the lightning protection insulator 16, there is a difference in the deflection angle between the lightning protection insulator and the suspension insulator series 10, but this is caused by arcing the tip of the arc horn 19 in the direction perpendicular to the line as shown in FIG. It is possible to prevent changes in the gap length.

Further, since the suspension metal fitting 4 of the lightning protection insulator 16 is restricted from rotating in the track direction by the mounting metal fitting 2 and the connecting pin 5A, a weight for counterbalancing the lightning protection insulator 16 is not required, The mounting member for the pick-up weight is also unnecessary, so that the entire apparatus can be made compact and lightweight, the number of parts can be reduced, and the manufacturing can be facilitated.

Further, even if the power transmission line 13 is disconnected and the suspension insulator string 10 is suddenly flipped up around the upper connecting pin 5B, the stopper 1 of the mounting adapter 14 is still connected by the connecting link 6.
4b is pushed, the mounting adapter 14 is rotated in the same direction, and the lightning protection insulator 16 is rotated upward as shown in FIG. 5, so that the suspension insulator series 10 is prevented from colliding with the lightning protection insulator 16. This will prevent damage to humans and animals due to damage and dropping of both insulators.

The present invention can be embodied as follows.

(1) As shown in FIG. 6, the mounting portion 4c of the hanging bracket 4,
The upper end of the horn mounting bracket 7 (having the same function as the connecting link 6) is inserted between 4d and rotatably connected by the connecting pin 5B, and the stopper 14b of the mounting adapter 14 is pushed by the horn mounting bracket 7. Make it move. or,
The tip of the mounting adapter 14 is tilted upward, and the lightning protection insulator 16 is tilted so that the lightning protection insulator 16 is separated from the suspension insulator series 10 toward the lower end.

(2) As shown in FIGS. 7 and 8, the mounting adapter 14 is rotatably connected to the hanging fitting 4 by the connecting pin 5B, and the connecting link 6 is connected to the mounting adapter 1 by the connecting pin 5E. For rotatably supporting the connecting link 6
The lightning protection insulator 16 is configured to be lifted upward together with the mounting adapter 14 in a state where the intermediate portion 6a of the above is in contact with the stopper 14d provided at the base end of the mounting adapter 14. In this embodiment, the stopper 14e provided on the upper end of the base end portion 14a of the mounting adapter 14 is provided at the mounting portion 4 of the hanging fitting 4.
By contacting the inner top surfaces of c and 4d, the mounting adapter 14
Are held horizontal.

In this embodiment, when the suspension insulator series 14 rotates counterclockwise in FIG. 7, the center of rotation is the connecting pins 5B and 5E.
Therefore, the mounting adapter 14 is used as the suspension insulator series 1.
Since it is rotated to a certain extent by the rotation of 0, the impact at the time of the collision between the mounting adapter 14 and the connecting link 6 is alleviated.

(Effects of the Invention) As described in detail above, the lightning protection horn insulator device of the present invention is
It is possible to reduce the size and weight by omitting the dead weight, to stabilize the installed state of the lightning rod insulator, to stabilize the discharge characteristics by keeping the discharge gap constant, and to improve the operation of the lightning rod insulator. It is possible to prevent the collision and drop of both insulators by restricting the inertial force by restricting the direction and preventing the collision of the support insulator and the lightning arrestor in the unlikely event that the transmission line is disconnected. There is an effect that the mechanical strength of the mounting metal fittings and the hanging metal fittings can be reduced to facilitate the manufacturing.

[Brief description of drawings]

FIG. 1 is an enlarged front view of an essential part of a lightning protection insulator device showing an embodiment embodying the present invention, FIG. 2 is an enlarged exploded perspective view of the same part, and FIG. 3 is a front view of the entire lightning protection horn insulator device. , 4th
FIG. 5 is a sectional view taken along the line AA in FIG. 3, FIG. 5 is a front view showing a state in which a suspension insulator series is rotated upward, and FIG. 6 is a front view of a lightning protection horn insulator device showing another example of the present invention. FIG. 7 is a partial front view of an essential part showing another example of the present invention, FIG. 8 is a partial perspective view of FIG. 7, and FIG. 9 is a front view showing a conventional lightning arrester device. 1 ... Support arm, 2 ... Mounting bracket, 2a, 2b, 2c
...... Bearing part, 4 ...... Hanging metal fitting, 4a, 4b ...... Projection part, 4
c, 4d ... Mounting part, 4e ... Stopper, 5A to 5E ...
… Connecting pin, 6 …… Connecting link, 7 …… Horn mounting bracket, 8 …… Ball clevis, 9 …… Suspension insulator, 10 ……
Suspension insulator string, 13 ... Transmission line, 14 ... Mounting adapter,
14a ... Base end part, 14b, 14d, 14e ... Stopper, 14c ... Horizontal part, 16 ... Lightning arrester, 19, 20
...... Arc horn, O1 ...... Central axis of lightning insulator, O2
…… Rotation axis of hanging metal fittings, G …… Air discharge gap.

Claims (1)

[Claims] Claim: What is claimed is: 1. A hanging metal fitting is supported on a support arm of a steel tower so as to be rotatable only in one direction via a mounting metal fitting, and a connecting link is orthogonal to the rotating direction of the hanging metal fitting. And a power transmission line is hung on the connecting link via a support insulator, and a mounting adapter is also attached to the hanging fitting by a stopper provided on the hanging fitting. The mounting adapter is provided with a current limiting element having a non-linear voltage-current characteristic, which is connected so as to be held at a predetermined position overhanging and pivotable upward by the pivotal movement of the connecting link. A lightning protection insulator is mounted, the rotation axis of the suspension fitting and the central axis of the lightning protection insulator are arranged so as to be located on substantially the same vertical plane, and an arc horn on the power-supply side provided on the power transmission line side, Make sure that the arc horn on the grounding side provided at the tip of the lightning arrestor is Lightning horn insulator and wherein the facing with a discharge gap.