JP2981297B2 - Transmission line support insulator device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission line supporting insulator device for supporting a transmission line on a steel tower.

[0002]

2. Description of the Related Art In a conventional transmission line supporting insulator device,
As shown in FIG. 5, a pair of tension insulators 8 are provided on the support arm 1 of the tower, and the tension insulators 8 support the transmission lines 11 on the power transmission side and the power reception side, respectively. The transmission lines 11 were electrically connected by jumpers 50.
The jumper wire 50 may be removed or attached for maintenance or inspection of the transmission line 11 or the substation. In particular, as shown in FIG. 5, another power transmission line 22 is supported at the tip of the support arm 1 via a tension insulator series 20, and another transmission line 22 is connected to one of the two power transmission lines 11 via a jumper wire 51 or 52. In a system in which the power transmission line 22 can be connected, the jumper wires 50, 51, 52 are frequently attached and detached. That is, the power load condition or the transmission line 11,
When power is transmitted from A to B and C in accordance with maintenance and inspection of the substation 22 and substations, jumpers 50 and 51 are used to transmit power from B to A.
And C to send power, jumpers 50 and 52,
When power is transmitted from A to C, a jumper wire 51 is used. When power is transmitted from B to C, a jumper wire 52 is used. When power is transmitted from A to B, a jumper wire 50 is used to connect the transmission lines 11 and 22 appropriately. The direction is changed.

[0003]

However, in this case,
The work of attaching and detaching the jumper wires 50, 51, 52 needs to be performed at the transmission line connecting portion at the tip of the tension insulator series 8, 20, which is remote from the support arm 1 of the tower, and there is a problem that the work is complicated. . Further, since the jumper wires 50, 51, 52 swing by the wind, a lightning arrester (not shown) attached to the tip of the support arm 1 of the tower is connected to the jumper wires 50, 5.
The jumper wires 50, 51, and 52 need to be arranged outside the swing range, and the connection of the jumper wires 50, 51, and 52 is appropriately changed depending on the power transmission direction. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to make it easier to attach and detach a jumper wire and to reduce restrictions on the mounting position of a lightning arrester. It is an object of the present invention to provide a transmission line supporting insulator device that can be used.

[0005]

In order to achieve the above object, according to a first aspect of the present invention, a pair of tension insulators is supported on a support arm of a tower, and the tension insulators are respectively connected to a power transmission side and a power transmission side. Supports the transmission line with the power receiving side, electrically connects both transmission lines with jumper wires , and has a tension insulator at the end of the support arm.
In the transmission line supporting insulator apparatus supporting the different transmission lines through the communicating, separating the jumper wire on the power transmission side and the power receiving side, the connecting fitting between those of the two jumper lines provided, wherein at its connecting fitting A connection portion of another jumper wire extending from another transmission line is provided.

According to a second aspect of the present invention, a supporting insulator is vertically fixed to a lower surface of a supporting arm, and the connecting fitting is fixed to a lower end of the supporting insulator.

[0007]

According to the first aspect of the present invention, since all the jumper wires are collectively connected to the connection fitting, the work of attaching and detaching the jumper wires can be performed in one place. According to the second aspect, since the supporting insulator is fixed to the supporting arm and the connecting fitting is fixed to the supporting insulator, the swing of the jumper wire connected to the connecting fitting due to wind is suppressed. .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, a pair of mounting plates 2 are fixed to both sides of a support arm 1 of a tower by bolts, and each mounting plate 2 is connected to a yoke via U clevises 3 and 4 and a connecting link 5 respectively. 6 are connected. At both ends of each yoke 6, two tension insulator series 8 are connected and arranged in parallel via connection links 7. A yoke 10 is connected to an end on the power receiving side of the tension insulator series 8 via a connection link 9, and a wire clamp fitting 12 for clamping the transmission line 11 is connected to the yoke 10 via a connection link 13. I have. One transmission line 11 supported by the tension insulator string 8 is a transmission line on the power transmission side, and the other transmission line 11 is a transmission line on the power reception side. Further, a jumper wire 15 is connected to each wire clamp fitting 12 by a jumper wire clamp fitting 14, and the transmission line 11 and the jumper wire 15 are electrically connected.

As shown in FIGS. 3 and 4, a mounting plate 16 is fixed to the end of the support arm 1 by bolts, and the mounting plate 16 is tensioned via U clevis 17, 18 and a connecting link 19. An insulator series 20 is connected. A connecting link 21 is provided at the end of the tension-insulating assembly 20 on the power receiving side.
Are connected to each other, and a wire clamp fitting 23 for clamping the power transmission line 22 is connected to the connection link 21. or,
Jumper wire clamp 2 is attached to wire clamp 23.
4, the jumper wire 25 is connected, and the transmission line 22 and the jumper wire 25 are electrically connected.

As shown in FIGS. 2 to 4, on the lower surface of the support arm 1, the mounting plate 2 and the mounting plate 16 are provided.
And a mounting bracket 28 is supported on a lower surface of the mounting plate 26 via a spacer 27 in a cantilever manner so as to be directed in the horizontal direction and in the front-rear direction of the support arm 1. . On the lower surface of the mounting bracket 28, a supporting insulator 30 is fixed by a bolt with its upper bracket 31 at a position corresponding to the spacer 27. A lower electrode 32 of the support insulator 30 supports a horn-shaped discharge electrode 33 on the power supply side, and a substantially triangular plate-like connecting metal 34 is fixed to a lower surface of the lower metal 32.

A lightning arrester 35 is fixed to the lower surface of the front end of the mounting bracket 28 with a bolt 36 with an electrode fitting 36 on the ground side. A horn-shaped ground-side discharge electrode 38 is supported on the lower end of the lightning arrester 35, that is, on the power-applying electrode fitting 37. A predetermined horn-shaped discharge electrode 38 is provided between the discharge electrode 38 and the discharge electrode 33. An air discharge gap G is provided.

The lightning arrester 35 is a pressure-resistant insulating cylinder (not shown) formed of a tensile material such as FRP in a cylindrical shape.
And a current-limiting element (not shown) mainly composed of zinc oxide (ZnO) housed in series therein and having non-linear voltage-current characteristics, and fitted and fixed to both ends of the pressure-resistant insulating cylinder. Capping-side and grounding-side electrode fittings 37, 36
And a rubber mold 39 provided on the outer periphery of the pressure-resistant insulating cylinder. The metal fittings 37, 36 on the power-supplying side and the grounding side of the lightning arrester 35 have arcing rings 40, which reduce the damage of the rubber mold 39 at the time of creepage flashing.
41 are provided.

As shown in FIGS. 1 to 4, the other ends of the three jumper wires 15 and 25 whose one ends are connected to the wire clamp fittings 12 and 23 are connected to the lower end of the support insulator 30. They are collectively connected to the metal fittings 34 and are electrically connected. That is, a U-shaped clamp fitting 42 is attached to the other end of each of the jumper wires 15 and 25, and the bolt 43 is tightened while the connecting fitting 34 is sandwiched by the clamp fittings 42, so that the jumper wires 15 and 25 are formed. Are fixed to the connection fitting 34. Therefore, jumper wire 1
5 and 25 are separated into a power application side and a load side, and they are connected by a connection fitting 34.

Next, the operation of the transmission line supporting insulator device configured as described above will be described. Now, when an abnormally large current exceeding the expectation is applied to the transmission lines 11 and 22 due to a large-scale electric shock, this current is transmitted to the jumper wires 15 and 25 and the connection fitting 34.
And discharge from the discharge electrode 33 to the discharge electrode 38 through the discharge gap G, flows from the electrode fitting 37 to a current limiting element (not shown) in the lightning arrester 35, and from the electrode fitting 36 on the ground side via the mounting bracket 28 to the support arm. 1 and then to the tower and discharged to ground. Subsequent subsequent flow is suppressed and cut off by the current limiting element.

In this embodiment, each of the transmission lines 11 and 12
The jumper wires 15 and 25 connected to the connecting arm 2 are collectively connected to a connecting metal fitting 34, and the connecting metal fitting 34 is located at a position where the work directly under the support arm 1 can be easily performed via the support insulator 30. Since it is supported, the work of attaching and detaching the jumper wires 15 and 25 can be performed easily and easily at one place. In addition, a connection fitting 34 for supporting the jumper wires 15 and 25 is fixed to the lower end of the support insulator 30, and the support insulator 30 is fixed to the support arm 1, and the jumper wires 15 and 25 are connected to the respective transmission lines 11 and 25. 22 is fixed at an intermediate portion between the jumper wires 15, 25.
Swing due to the wind can be suppressed. Therefore, the degree of freedom of the mounting position of the lightning arrester 35 can be increased, and the lightning arrester 35 can be mounted at the optimum position with respect to the steel tower.

[0016]

As described above in detail, according to the present invention, it is possible to easily perform the work of attaching and detaching the jumper wire, and to exert an excellent effect that the restriction on the mounting position of the lightning arrester can be reduced. I do.

[Brief description of the drawings]

FIG. 1 is a bottom view showing an embodiment of a transmission line supporting insulator device embodying the present invention.

FIG. 2 is a partially enlarged bottom view of the same.

FIG. 3 is a partially enlarged bottom view of the same.

FIG. 4 is a side view of the same.

FIG. 5 is a bottom view showing a conventional example.

[Explanation of symbols]

1 support arm, 8 tension insulator series, 11 transmission line, 15
Jumper wire, 25 jumper wire, 30 support insulator,
34 Connecting bracket.

Claims (2)

(57) [Claims] 1. A set of tension insulator series (8) is supported on a support arm (1) of a tower, and the tension insulator series (8) is connected to a transmission line (11) between a power transmission side and a power reception side, respectively. supports both transmission lines between (11) and electrically connected by jumper wire (15), the tip of the support arm (1) tension insulator string (2
In the transmission line supporting insulator device supporting another transmission line (22) via the above (0), the jumper wire (15) is separated into a power transmission side and a power reception side and connected between the two jumper wires (15). Metal fittings (3
4), and the connecting wire (34) is provided with the another power transmission line.
A transmission line supporting insulator device comprising a connecting portion of another jumper wire (25) extending from (22) . 2. A support insulator (3) is provided on the lower surface of the support arm (1).
The transmission line supporting insulator device according to claim 1, wherein the connecting metal fitting (34) is fixed to a lower end of the supporting insulator (30).