JPH0654623B2 - 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 can reduce the weight and size of the entire device. The present invention relates to a lightning protection horn insulator device.

(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 10A in series is suspended from the mounting bracket 33, and a lower horn mounting bracket 11 and an electric wire clamp 12 are attached to the lower end of the suspension insulator string 10.
The power transmission line 13 is supported via.

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, connecting pins 35 and 36 for connecting the horn mounting member 33, the connecting member 31 and the suspension insulator string 10 respectively.
Is devised so as to cancel the moment of the lightning protection insulator 16 by changing the horizontal position of the lightning protection insulator 16.

(Problems to be Solved by the Invention) However, in the conventional mounting structure of the suspension insulator series 10 and the lightning protection insulator 16, the suspension insulator series 10 swings due to the swing of the power transmission line 13 or water is generated on the power transmission line. Or if it is hanging insulator series 1
There was a problem that the suspension load of 0 changed, and therefore the lightning protection insulator 16 changed its position, and it was difficult to stably maintain the column state, and there was a limit to its application.

Further, since the two connecting pins 35 and 36 described above are arranged so that the phases are different in the vertical direction, the horn mounting bracket 33
Has a problem that it becomes difficult to secure a clearance between the power transmission line 13 and the support arm 1 supporting the power transmission line below the power transmission line 13 when applied to an existing suspension insulator device. .

In addition, as described above, there is also a problem that the upper horn mounting bracket 33 requires a special device in view of the weight balance of the lightning protection insulator 16.

Further, 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 protection insulator 16. As a result, the lightning insulator 16 and the suspension insulator string 10 may be damaged.

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. There were problems such as occurrence.

A first object of the present invention is to provide an existing suspension insulator device which can stably support a lightning protection insulator and shortens a distance from a support arm of a steel tower to a support insulator without being influenced by usage conditions. An object is to provide a lightning protection horn insulator device which can be widely applied and can be easily mounted.

In addition to the first object, a second object of the present invention is to prevent the supporting insulator from colliding with the lightning protection insulator when the supporting insulator is rotated upward due to disconnection of the power transmission line. An object is to provide a lightning protection horn insulator device capable of controlling the degree.

(Means for Solving the Problem) In order to achieve the first object, the lightning protection horn insulator device according to claim 1 is hung so as to be rotatable only in one direction with respect to a support arm of a tower through a mounting bracket. A direction that is orthogonal to the rotation direction of the hanging metal fitting that supports the metal fitting, and that the hanging metal fitting is integrally provided with a flat plate-shaped bracket, and the bracket is engaged with the upper part of the connecting link by the connecting pin. A state in which a support insulator for supporting a power transmission line is provided at a lower portion of the connection link, and a mounting adapter is engaged with a side surface of the bracket or the connection link to extend laterally. With the connecting pin, and 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 Configured to be located on almost the same vertical plane, A means is employed in which an arc horn on the power supply side provided on the power transmission line side and an arc horn on the ground side provided at the tip of the lightning protection insulator are opposed to each other with a predetermined air discharge gap.

In order to achieve the second object, the lightning protection horn insulator device according to a second aspect of the present invention is the lightning protection horn insulator device according to the first aspect, wherein the mounting adapter is rotated in a predetermined angle range by the upward movement of the connecting link. It has a means of connecting so as to be rotatable inside.

(Operation) In the lightning protection horn insulator device according to claim 1, since the rotation axis of the hanging metal fitting and the central axis of the lightning insulator are located in the same vertical plane when the lightning arrestor is stationary, the pillar state is stable. Turn into. 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. It is possible to reduce the strength of the mounting metal fittings and the hanging metal fittings, and to keep the discharge gap length constant by the structure of the arc horns on the voltage applying side and the grounding side.

In particular, since the present invention connects the hanging metal fitting, the connecting link and the mounting adapter with the common connecting pin, it is possible to minimize the vertical distance from the hanging metal fitting to the support insulator. Even if it is applied to the transmission line support insulator installation of, there will be no problem in terms of clearance.

In addition to the function of the lightning protection horn insulator device according to claim 1, the lightning protection horn insulator device according to claim 2 has a structure in which the power transmission line is disconnected and the support insulator moves downward with a hanging point at the top as a center. Even if it is suddenly jumped up, the mounting adapter is rotated in the same direction by the connecting link and the lightning protection insulator is rotated upwards, so that the support insulator is prevented from colliding with the lightning protection insulator, and the degree of damage to both insulators is prevented. Suppressed.

(Embodiment) An embodiment embodying the present invention will be described below with reference to FIGS. 1 to 4.

As shown in FIG. 1 and FIG. 3, a mounting bracket 2 is fixed to a tip portion of a support arm 1 mounted on a steel tower by a bolt 3, and a pair of left and right bearing parts 2 integrally formed on the mounting bracket 2.
A shaft cylinder portion 4a integrally formed on the upper portion of the hanging metal fitting 4 is fitted between a and 2b, and can be rotated only in one direction (in this embodiment, a horizontal direction orthogonal to the track direction P) by the connecting pin 5. Supported by. A pair of brackets 4b and 4c are integrally formed in parallel with each other at a predetermined interval in the lower portion of the hanging metal fitting 4, and a flat plate-shaped upper portion 6a of the connecting link 6 is inserted between the brackets 4b and 4c. The connecting pins 7 are connected so as to be rotatable in the track direction P.

Further, the lower portion 6b of the connecting link 6 is formed in a flat plate shape orthogonal to the upper portion 6a, and the bifurcated upper portion 8a of the ball clevis 8 is fitted to the lower portion 6b, and is connected by the connecting pin 9 in the direction perpendicular to the line. It is rotatably connected. On the ball clevis 8, a suspension insulator series 10 as a support insulator formed by connecting a large number of suspension insulators 10A in series is suspended so as to be swingable in the line direction and the orthogonal direction, and is attached to the lower end portion of the suspension insulator series 10. The transmission line 13 is supported via the horn mounting bracket 11 and the electric wire clamp 12.

As shown in FIG. 2, the bracket 4b of the hanging fitting 4,
On the outer surface of 4c, a mounting adapter 14 for mounting the lightning protection insulator 16 is mounted so as to be directed to both left and right sides. The mounting adapter 14 includes a pair of plates 15A and a spacer 1
5B are connected to each other at a predetermined interval,
Both plates 15A are connected by the connecting pin 7 in a state where they are fitted to the outer surfaces of the brackets 4b and 4c. Then, the stopper portion 4 in which the upper end edges of both plates 15A are notched and formed in the lower surface of the shaft tubular portion 4a of the hanging fitting 4
By contacting d, the hanging bracket 4 and the mounting adapter 14 are integrally rotatably assembled.

Here, the horizontal axis of the mounting adapter 14 allows the rainwater from the support arm 1 to pass through the lightning protection insulator 16 and a discharge gap G to be described later.
It is better to set it slightly upward so that it does not move to.

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 central axis O1 of the lightning protection insulator 16 is located within a vertical plane passing through the rotation axis O2 of the hanging fitting 4. Further, the electrode metal fitting 1 on the lower side of the lightning protection insulator 16 on the power-supply side
An arc horn 19 on the ground side is supported by 8.

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, arcing horns 24 and 25 are attached to the horn mounting portions 14a and the horn mounting brackets 11 formed on both the left and right side surfaces of the mounting adapter 14 in order to reduce damage caused by creeping flash on the suspension insulator string 10. .

Next, the operation of the lightning protection insulator position 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 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, the lightning protection insulator 16 does not shake even if the suspension insulator string 10 swings in the track direction without applying an eccentric load to the mounting bracket 2, the connecting pin 5 and the mounting adapter 14. The lightning protection insulator 16 can be stably held without moving. Further, since the arc horn 20 is located outside the arc horn 19, it is possible to minimize the change in the discharge gap flow.

Further, when the suspension insulator series 10 swings in the direction perpendicular to the line, the suspension metal fitting 4 is rotated in the same direction around the connecting pin 5, and the lightning protection insulator 16 is rotated accordingly. There is a difference in the deflection angle between the lightning protection insulator 16 and the suspension insulator series 10 due to the weight of the lightning protection insulator 16, which is caused by the arc gap as shown in FIG. 4 when the tip of the arc horn 19 is viewed from the line direction. The change in length can be prevented.

Furthermore, 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 5,
A weight for counterbalancing the lightning protection insulator 16 is not required, and a mounting member for the weight is not required.
The entire device is made smaller and lighter, the number of parts is reduced, and manufacturing becomes easier.

Particularly, in the embodiment of the present invention, the bracket 4 of the hanging fitting 4 is
b, 4c, the upper part 6a of the connecting link 6, and the mounting adapter 1
Since 4 are connected at the same height position by a common connecting pin 7, the vertical distance from the hanging metal fitting 4 to the suspension insulator string 10 can be minimized as a result, and as a result, the existing transmission line support can be supported. Even when applied to the insulator mounting, it is possible to secure the insulation clearance between the power transmission line 13 and the supporting arm 1 located below.

The present invention can also be embodied as follows.

(1) As shown in FIG. 5, the bracket 4 of the hanging bracket 4
b is made into one, the bifurcated upper part 6a of the connecting link 6 is fitted to the bracket 4b, and further, the upper part 6a
15A, 1 of the mounting adapter 14 on the outer surface of the
Connect them with connecting pins 7 with 5A fitted. The operation and effect of this other example are also similar to those of the above-described embodiment.

(2) As shown in FIG. 6, one mounting projection 2c is formed in the lower part of the mounting bracket 2, and a pair of left and right brackets 4e provided on the upper part of the hanging bracket 4 are attached to the mounting projection 2c. The bracket 4 is fitted and connected by a connecting pin 5 so as to be rotatable in the direction perpendicular to the line, and is further provided on the lower portion of the hanging bracket 52.
The single plate-shaped mounting adapter 14 is fitted into b and 4c, and the connecting link 6 is attached to the outer surface of the brackets 4b and 4c.
The bifurcated upper part 6a may be fitted and connected by the connecting pin 7.

(3) The mounting adapter 14 of the embodiment shown in FIG. 6 can be made rotatable about the connecting pin 7 in the counterclockwise direction as shown in FIG.

This embodiment is the embodiment of claim 2 of the present invention and has the following operation. That is, even if the power transmission line 13 is disconnected and the suspension insulator string 10 is suddenly flipped up about the upper connecting pin 7, the connecting adapter 6 rotates the mounting adapter 14 in the same direction. Since the lightning protection insulator 16 is rotated upward as shown in FIG. 8, it is possible to prevent the suspension insulator series 10 from colliding with the lightning protection insulator 16 and suppress the degree of damage to both insulators.

(4) A vertical angle adjusting means (not shown) is provided in the middle of the mounting adapter 14, a horizontal angle adjusting means (not shown) is provided, and the vertical and horizontal angle adjusting means are used together. To do.

(Effects of the Invention) As described in detail above, the lightning protection horn insulator device according to claim 1 can be made smaller and lighter by omitting the weight, and can stabilize the columnar state of the lightning arrester, and can also be discharged. It is possible to stabilize the discharge characteristics by keeping the gap constant, and further to restrict the inertial force by restricting the operation of the lightning protection insulator in one direction.
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.

In particular, the present invention shortens the vertical lengths of the hanging metal fittings and the connecting links of the support insulator so that they can be easily mounted without shortening the insulation clearance with respect to the mounting of the existing transmission line support insulator. There is.

In addition to the effect of the invention described in claim 1, the lightning protection horn insulator device according to claim 2 prevents collision between the support insulator and the lightning arrestor in the unlikely event that the power transmission line is disconnected. There is an effect that the degree of damage can be suppressed, and further, the mechanical strength of the mounting metal fittings and the hanging metal fittings can be reduced to facilitate 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 of FIG. 3, FIG. 5 is an exploded perspective view showing another example of the hanging fitting and the connecting link, and FIG. 6 is a partial front view showing only another part of the present invention. FIG. 7 is a partial front view showing another example of the present invention, FIG. 8 is a front view when the wire breaks in another example of FIG. 7, and FIG. 9 is a front view showing a conventional lightning protection horn insulator device. . 1 ... Support arm, 2 ... Mounting metal fitting, 2a, 2b ... Bearing part, 4 ... Suspension metal fitting, 4a ... Shaft cylinder part, 4b, 4c,
4e ... Bracket, 4d ... Stopper part, 5 ... Connection pin, 6 ... Connection link, 7 ... Connection pin, 10 ... Suspension insulator string, 13 ... Transmission line, 14 ... Mounting adapter, 1
5A ... plate, 15B ... spacer, 16 ... lightning protection insulator, 19,20 ... grounding and charging side arc horn, O1 ... center axis of lightning protection insulator, O2 ... rotation axis of hanging metal fitting .

Claims (2)

[Claims] 1. A hanging metal fitting (4) which is rotatable in only one direction with respect to a support arm (1) of a steel tower via a mounting metal fitting (2).
And a flat plate-like bracket (4b, 4c) is integrally provided on the hanging metal fitting (4).
4c) is connected to the upper part (6a) of the connecting link (6) by a connecting pin (7) so as to be rotatable in a direction orthogonal to the rotating direction of the hanging fitting (4), A support insulator for supporting the power transmission line (13) is provided at a lower portion (6b) of the connection link (6), and a mounting adapter (14) is provided on a side surface of the bracket (4b, 4c) or the connection link (6). The lightning arrester (16) equipped with a current limiting element having a non-linear voltage-current characteristic is attached to the attachment adapter by engaging with the connecting pin (7) in a state of being engaged and extending to the side. , The rotation axis (O2) of the hanging metal fitting (4), and the lightning protection insulator (1
6) the central axis (O1) is located substantially in the same vertical plane, the arc horn (20) on the power-supply side provided on the side of the power transmission line and the ground side provided on the tip of the lightning protection insulator And an arc horn (19) of the lightning protection horn insulator device. 2. The lightning protection horn insulator device according to claim 1, wherein the mounting adapter (14) is rotatably connected within a predetermined angle range by the upward movement of the connecting link (6). Horn insulator device.