JP3349930B2 - Suspended jumper 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 suspension type jumper device for a multi-conductor power transmission line.

[0002]

2. Description of the Related Art FIG. 8 shows a conventional suspended jumper device 1 on one side from the center of a steel tower. Each electric wire (referred to as an elementary conductor) 2 of the multi-conductor power transmission line is retained on the steel tower arm 6 side by a retaining clamp 5 connected to each yoke 4 at the base end of the tension insulator series 3. A support device 7 is suspended from each of the yokes 4, and both ends of a horizontal member 8 for supporting a middle portion of the jumper line are suspended by both support devices 7 (only one side is shown as described above). Each jumper wire 11 corresponding to each electric wire 2 of the multi-conductor power transmission line is connected to an end clamp 5 of each electric wire 2 via a jumper socket 12, and each jumper wire 11 is mutually connected by a jumper spacer 13a on both sides. Are maintained, and a jumper spacer 1 is provided at an intermediate portion of the jumper wire 11.
3b keeps the interval between them, and the center of the jumper spacer 13b is fixed to a steel horizontal member 8 made of, for example, H-section steel. Thus, the middle part of the jumper wire 11 is attached to the horizontal member 8.

As described above, in the conventional suspension type jumper device 1, a plurality of jumper wires 11 corresponding to the respective electric wires 2 of the multi-conductor power transmission line are horizontally held by simply maintaining the intervals by the jumper spacers 13a and 13b. It is a configuration that is attached to the material 8.

[0004]

By the way, when a short circuit accident occurs in a multiconductor transmission line, an electromagnetic attraction force is generated between the electric wires (element conductors) 2 of the multiconductor transmission line due to a large short current. In the device, an attractive force acts between the jumper wires 11 corresponding to the respective electric wires 2 of the multi-conductor power transmission line (that is, acts as a centripetal force), and the jumper wires 11 may collide violently and be damaged. is there.
Similarly, the impact load in the center direction acts on the jumper spacer 13a, which may cause permanent deformation or breakage.
Further, when the jumper spacer 13a designed in consideration of the corona characteristic is permanently deformed or damaged, there is a problem that the corona characteristic deteriorates in shape. Deterioration of corona characteristics causes problems such as corona noise, radio noise, and television noise.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional drawbacks. In a suspended jumper device for a multi-conductor power transmission line, collision of jumper wires due to electromagnetic attraction during a short circuit is prevented. An object of the present invention is to provide a suspended jumper device that can prevent damage to a jumper wire and deformation / damage of a jumper spacer, and prevent deterioration of corona characteristics.

In order to solve the above problems, the present invention hangs a supporting device from a metal fitting between a base end of a tension insulator series on both sides of a tower and a retention clamp, and uses the two supporting devices to support a jumper wire intermediate portion. In a suspension type jumper device in which both ends of a horizontal member are respectively suspended and jumper wires electrically connected to respective conductors of a multiconductor transmission line held by a steel tower are respectively attached to the horizontal member, A plurality of jumper wires for each elementary conductor are bound together by a clamp into one jumper wire bundle in a close contact state in parallel , and this jumper wire bundle is fixed along the supporting device and the horizontal member.

According to a second aspect of the present invention, the supporting device according to the first aspect has a steel frame structure in which two diagonal members parallel to each other at intervals are connected at upper and lower ends. The jumper wire bundle is arranged in the middle of the diagonal member.

[0008]

FIG. 1 is a block diagram showing an embodiment of the present invention.
A description will be given with reference to the embodiment shown in FIGS. FIG. 1 is a front view of one part from the center of a suspended jumper device 21 according to one embodiment of the present invention, FIG. 2 is a view of an essential part in FIG.
3 is a sectional view taken along the line BB in FIG. 1, FIG. 4 is a sectional view taken along the line CC, and FIG. 5 is a sectional view taken along the line DD. Each electric wire (referred to as an elementary conductor) 2 of the multiconductor power transmission line is retained on the steel tower arm 6 side by a retaining clamp 5 connected to a metal fitting 4 such as a yoke on the base end side of the tension insulator series 3. A support device 22 is provided on a metal fitting 4 such as a yoke between the tension insulator series 3 and the retaining clamp 5.
The lower end of the support device 22 is connected to the end of a horizontal member 23 made of a steel pipe for supporting an intermediate portion of the jumper wire. As shown in FIG. 2, the supporting device 22 has a frame-shaped structure in which a steel pipe 22a is bent into an elongated U-shape and a connecting member 22b is fixedly welded to an upper end portion. The lower end is fixed to the horizontal member 23 by a hinge structure using, for example, a bolt.

The multi-conductor power transmission line of the embodiment is a four-conductor power transmission line, and four jumper wires 24 corresponding to the four wires (element conductors) 2 are respectively connected to jumper sockets 25 compressed and fixed at their respective ends. Are connected and fixed to the electrical contact surfaces of the anchoring clamps 5 of the respective electric wires 2 through the wires. The jumper socket 25 is not a general commercially available shape, but has a shape having a special angle corresponding to the direction of the jumper wire 24 as shown in the figure.

As shown in FIG. 3, the four jumper wires 24 are bundled by a clamp 27 at a position slightly away from the jumper socket 25. Clamp 2 in the example shown
Reference numeral 7 denotes a split structure as shown in FIG. 3, in which four jumper wires 24 are bundled together by bolts via an intervening material 29 such as rubber.

The bundled jumper wires 24, that is, the jumper wire bundles 28, are arranged inside the support device 22 having the above-described frame structure, and are fixed to the support device 22 by the pipe spacer 30. The illustrated example of the pipe spacer 30
Has a two-part structure as shown in FIG.
In this structure, the right and left portions of the second steel pipe 22a and the center jumper bundle 28 with the inclusion 29 interposed therebetween are clamped and fixed with bolts.

The middle part of the jumper bundle 28 (the horizontal member 23)
Is disposed at the center of two parallel horizontal members 23, and is similarly fastened and fixed by a pipe spacer 31 having a split structure similar to the pipe spacer 30. In other words, the structure is such that the horizontal member 23 on both sides and the central jumper wire bundle 28 with the inclusion 29 interposed are clamped and fixed with bolts.

In the above-mentioned suspension type jumper device 21, since the four jumper wires 24 are bundled as one jumper wire bundle 28, even if a short circuit accident occurs in the transmission line, the jumper wires are connected to each other by electromagnetic attraction. There is no problem of damage due to severe collision with force, and there is no problem of deformation or damage of the jumper spacer. Therefore, there is no problem that the corona characteristic is deteriorated due to permanent deformation or damage of the jumper spacer.
Corona noise, radio noise, and television noise are prevented.

Further, in the embodiment, since the jumper wire 24 is disposed inside the steel supporting device 22 having the frame-shaped structure,
Corona generation is suppressed, and a jumper device having good corona characteristics can be obtained.

FIG. 6 shows an embodiment in which the electric wire 2 is retained on the steel tower side by a wedge-shaped clamp 35. This wedge-shaped clamp 3
As shown in detail in FIG. 7, reference numeral 5 denotes an inner metal part 36 having a tapered outer surface in a split structure, an outer metal part 37 having a tapered inner surface which covers the outer periphery of the inner metal part 36, and attached to the outer metal part 37. And a hanger part 38 provided. The electric wire 2 is sandwiched between upper and lower metal fittings 36a and 36b of the split inner metal fitting 36, and the electric wire 2 is fixed to the inner metal fitting 36 by tightening with a bolt. Then, the outer metal fitting 37 is slid rightward in FIG. When the hanger portion 38 is connected to the metal fittings 4 on the tension insulator series 3 side as described above, the electric wire 2 is firmly gripped by the wedge effect by tension and is retained on the steel tower side. Then, the electric wire 2 retained by the wedge-shaped clamp 35 is connected to the jumper wire 24 via the connection sleeve 39 and bundled by the clamp 27 in the same manner as described above.

If the support device of the present invention has a frame-shaped structure like the support device 22 of the embodiment, the jumper wire 24 can be arranged inside the support device 22 to improve the corona characteristics. However, it is not necessarily limited to a frame-shaped structure. For example, it may be a single rod-shaped support device.

[0017]

According to the present invention, a plurality of jumper wires in a tension tower of a multi-conductor transmission line are connected in parallel to each other by clamping.
Thereby tying the single jumper wire bundle wearing state, the jumper wire bundle, since a structure for fixing Sowase to a support device for the horizontal member and hung this, even if a short circuit in the transmission line occurs, jumper wire There is no problem that they are damaged by violently colliding with each other due to the electromagnetic attraction force, and there is no problem that the jumper spacer is deformed or damaged. Therefore, there is no problem that the corona characteristic is deteriorated due to permanent deformation or damage of the jumper spacer, and the corona noise, the radio noise, and the television noise are prevented.

According to the second aspect of the present invention, since the jumper wire bundle is disposed inside the frame-shaped steel supporting device, the generation of corona is suppressed, and a jumper device having good corona characteristics can be obtained. .

[Brief description of the drawings]

FIG. 1 is a front view of a suspension type jumper device according to an embodiment of the present invention, showing a portion of one side from the center of the suspension type jumper device.

FIG. 2 is a view of the main part in FIG.

FIG. 3 is a sectional view taken along line BB in FIG.

FIG. 4 is a sectional view taken along line CC in FIG.

FIG. 5 is a sectional view taken along line DD in FIG.

FIG. 6 shows another embodiment of the present invention, and is a front view of one side from the center of the suspension type jumper device when an electric wire is retained by a wedge-shaped clamp.

FIG. 7 is an enlarged view of a partly cutaway showing details of a wedge-shaped clamp in FIG. 6;

FIG. 8 shows a conventional suspended jumper device, and is a front view of one side portion from the center of the suspended jumper device.

[Explanation of symbols]

 2 Electric wire (element conductor) of multi-conductor power transmission line 3 Strand insulator 4 Metal fitting 5 Retention clamp 6 Steel tower arm 21 Suspended jumper device 22 Supporting device 22a Steel pipe 22b Connecting member 23 Horizontal member 24 Jumper wire 25 Jumper socket 27 Clamp 28 Jumper Wire Bundle 29 Inclusions 30 Jumper Spacer in Support Device 31 Jumper Spacer in Horizontal Material 35 Wedge Clamp 39 Connection Sleeve

────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Takashi Kamiyama 1-3-1 Uchisaiwaicho, Chiyoda-ku, Tokyo Inside Tokyo Electric Power Company (56) References JP-A-7-1135728 (JP, A) Shokai Sho55 −2209 (JP, U) Actually open 1986-84633 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02G 7/20

Claims (2)

(57) [Claims] 1. A supporting device is suspended from metal fittings between a base end of a tension insulator series on both sides of a tower and a retention clamp, and both ends of a horizontal member for supporting an intermediate portion of a jumper line are suspended by both supporting devices. In a suspended jumper device, a jumper wire electrically connected to each elementary conductor of a multiconductor transmission line fixed to a tower and attached to the horizontal member, a plurality of Jumper wire is fixed by clamp
In a state where the rows are in close contact with each other, they are bound into one jumper wire bundle, and this jumper wire bundle is fixed along with the supporting device and the horizontal member.
A suspension type jumper device. 2. The supporting device has a steel frame-shaped structure in which two diagonal members parallel to each other at intervals are connected at upper and lower ends, and is provided between the two diagonal members. The suspension type jumper device according to claim 1, wherein the jumper wire bundle is arranged.