JPH0974656A - Jumper device for overhead transmission line having horizontal angle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the tilting of the yoke of a jumper device for overhead transmission line having horizontal angle to which a supporting lever that supports a rigid jumper at the vicinities of both ends is fitted. SOLUTION: A main transmission line is anchored to a strain tower through anchor clamps, yokes 5, tension insulator strings, etc., on both sides of the strain tower. The upper section of supporting levers 10 are connected to supporting lever fixtures 26 which are fixed to the lower surfaces of the yokes 5. The lower end sections of the levers 10 horizontally support the rigid jumper sections of a jumper line on both sides of the strain tower. Each fixture 26 has supporting connecting holes 26c not only at the center of the fixture 26 in the protruding direction (lateral direction in the figure) of the arm of the strain tower, but also at positions which are deviated from the center in the protruding direction of the arm. When the transmission line has a horizontal angle, the yokes 5 normally tilt, but, when the levers 10 are connected to one of the connecting holes 26c at appropriate positions, the yokes 5 are balanced with the loads from the levers 10 supporting the rigid jumper section and the titling of the yokes 5 can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jumper device for an overhead transmission line having a horizontal angle, and more particularly to a support rod mounting structure for mounting a support rod supporting a rigid jumper portion of a jumper wire to a yoke. is there.

[0002]

2. Description of the Related Art FIG. 3 shows a general structure of a suspension portion of an overhead transmission line in a tension tower. The power transmission line main line 2 is retained by the steel tower arm 1a of the tension resistant steel tower 1 through the strain clamp 3, the connecting metal fitting 4, the yoke 5, the tension insulator string 6, etc. The rigid jumper portion 8 is electrically connected through a jumper wire 7 including a jumper portion 8 and flexible jumper portions 9 on both sides thereof.
The vicinity of both ends of is supported by supporting rods 10 attached to the yoke 5. Reference numerals 11 and 12 are arc horns.
The flexible jumper section 9 is generally the main line 2 of the power transmission line.
The rigid jumper portion 8 is formed by adding a rigid material to the stranded wire conductor or an aluminum pipe conductor tube.

The connecting structure of the yoke 5 and the supporting rod 10 in the conventional jumper device is as shown in FIG. 4, and the supporting rod mounting member 16 is fixed to the lower surface of the yoke 5 with a bolt 15, and the supporting rod mounting member 16 is attached. The support rod 10 was connected to the central portion of the steel tower arm 16 in the protruding direction (the horizontal direction in FIG. 4) (thus, the central portion of the yoke 5 in the steel tower arm protruding direction). That is, a support rod connecting hole (support rod connecting portion) 16a is formed in the center of the support rod mounting bracket 16 in the tower arm protruding direction.
The support rod 10 is connected to the eyebolt 17 vertically penetrating and fixed in the support rod connecting hole 16a through the U-link 18 and the connecting pin 19.

[0004]

By the way, as shown in FIG. 6, the projecting direction of the tower arm 1a (vertical direction in FIG. 6).
In the case of a tension-resistant steel tower with a large angle formed by the tension-resistant insulator string 6 with respect to the direction orthogonal to the
Since there is a difference ΔL in length between the outside and the tension-resistant insulator string 6,
As shown briefly in FIG. 6 and shown in detail in FIG. 5, the yoke 5 is in a tilted state (the tilted angle of the yoke 5 is indicated by α). The inclination of the yoke 5 naturally causes an imbalance in tension between the two tension insulator chains 6, and also causes the clevis or the like to be twisted to cause breakage.
In addition, inconvenience that the vicinity of the end of the flexible jumper portion 9 on the side of the detention clamp 3 cross-contacts the other electric wire 2, or
There are also drawbacks such as the inconvenience that the length of the flexible jumper portion 9 is different depending on the electric wire 2 on the outside, which hinders the work of forming the flexible jumper portion 9 and prefabrication. Further, when the horizontal angle is not so large, the inclination of the yoke 5 is not so large, so in the past, the jumper wire 7 was attached as it is, but in recent years, the horizontal angle is required due to difficulty in obtaining a site. In many cases, there is no choice but to increase the size, and if the jumper wire 7 is attached to the inclined yoke 5 as it is, a problem may occur in the separation from the tension insulator string 6 when rolling. Furthermore, due to the tilting of the yoke 5,
There is also a problem that misalignment (relative displacement of the tips of both arc horns viewed from the longitudinal direction of the insulator) occurs between the opposing arc horns 11 and 12, and insulation coordination differs from the design. Further, it is not preferable in appearance that the yoke 5 is inclined.

The present invention has been made to solve the above problems, and in a jumper device for an overhead power transmission line having a horizontal angle, it is an object of the present invention to prevent the tilt of the yoke that holds the main line of the power transmission line. It is intended to eliminate various inconveniences associated with.

[0006]

According to the present invention for solving the above-mentioned problems, the main lines of transmission lines on both sides of a tension-resistant steel tower are retained on a steel tower arm via a strain clamp, a yoke, and a tension-resistant insulator string, respectively, and at the same time, each yoke is secured to the yoke. The attached support bar supports near both ends of the rigid jumper part of the jumper wire,
In a jumper device for an overhead power transmission line having a horizontal angle formed by connecting both ends of the rigid jumper portion and each of the tension clamps by flexible jumper portions in jumper wires, a supporting rod is attached to the lower surface of the yoke. In addition to fixing the metal fittings, this support rod mounting metal fitting is characterized in that support rod connecting portions capable of connecting the support rods are provided at a plurality of positions in the projecting direction of the tower arm.

According to a second aspect of the present invention, the support rod mounting metal piece is provided with a substantially vertical plate-shaped portion which is orthogonal to the longitudinal direction of the transmission line main line, and the plate-shaped portion is provided with a plurality of connection holes arranged in the protruding direction of the tower arm. It is characterized by being provided.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to an embodiment shown in FIGS. The overall configuration of the jumper device of the present invention is the same as that of FIG. 3 described above. That is, the transmission line main line 2 is retained by the steel tower arm 1a of the tension resistant steel tower 1 via the detention clamp 3, the connecting metal fitting 4, the yoke 5, the tension insulator string 6 and the like, and the transmission line main lines 2 on both sides of the steel tower are , Electrically through a jumper wire 7 composed of a rigid jumper portion 8 made of a rigid conductor attached to a stranded wire conductor or an aluminum pipe conductor and a flexible jumper portion 9 made of a stranded wire conductor on both sides thereof. Both ends of the rigid jumper portion 8 that are connected are supported by support rods 10 attached to the yoke 5. Reference numerals 11 and 12 are arc horns.

The jumper device of the present invention is characterized by the support rod mounting structure for mounting the support rod 10 supporting the rigid jumper portion 8 on the yoke 5, that is, the structure of the support rod mounting bracket provided on the lower surface of the yoke 5. . That is, as shown in FIGS. 1 and 2, the support rod mounting metal fitting 26 includes a fixing portion 26a fixed to the yoke 5 with a bolt 15 and a substantially vertical plate-like portion 26b orthogonal to the longitudinal direction of the transmission line main line 2. L shape,
This plate-like portion 26b has a structure in which, for example, three support rod connecting holes (support rod connecting portions) 26c arranged in the projecting direction of the steel tower arm 1a (horizontal direction in FIG. 1) are provided. In this case, the support rod connecting hole 26c at the left end in FIG. 1 is located at the center of the yoke, and the other two support rod connecting holes 26c are displaced inward or outward in the protruding direction of the steel tower arm 1a. The support rod connection hole 2
The direction in which the position of 6c is displaced from the center of the yoke 5 (rightward in the case of FIG. 1) is the shorter length side of the inner and outer tension-resistant insulator string 6 (see FIG. 6). The yoke 5 of the embodiment has a width dimension that is widened in a direction in which the support rod connecting hole 26c is displaced in accordance with the dimension of the support rod mounting member 26. And the support rod 10 is
Support rod connecting hole 26 of plate-like portion 26b of support rod mounting bracket 26
It is connected to the horizontal pin 27 passing through a through links 28, 29 and connecting pins 30, 31.

According to the support rod mounting member 26, since the support rod mounting member 26 is provided with the plurality of support rod connecting holes 26c arranged in the protruding direction of the tower arm 1a, the support rod supporting the rigid jumper portion 8 is provided. The supporting rod connecting hole 26c at a position where the yoke 5 is horizontally balanced when the load from 10 is taken into consideration.
As shown in FIG. 1, the yoke 5 can be prevented from being tilted by connecting the support rod 10 to.

In the embodiment, the connecting hole 26c is provided as the support rod connecting portion, but the connecting hole 26c is not necessarily limited to the hole. For example, a protrusion for connection may be provided on the plate-shaped portion 26b. Further, the structure of the support rod mounting bracket is not limited to that of the embodiment. In short, the support rod mounting bracket may be any one as long as the support rod connecting portions capable of connecting the support rods can be provided at a plurality of positions in the tower arm protruding direction. Further, the support rod connecting portion is not limited to a separated one, and may be, for example, an elongated hole.
It is also possible to adopt a structure in which the connecting position of the supporting rod can be continuously changed. Further, the yoke itself may also serve as the support rod attachment fitting.

[0012]

According to the present invention, since the support rod mounting metal fitting provided on the lower surface of the yoke is provided with the plurality of support rod connecting portions arranged in the projecting direction of the tower arm, the yoke is provided when the load from the support rod is taken into consideration. By selecting the supporting rod connecting part at the position that is horizontally balanced, and connecting the supporting rod to this supporting rod connecting part,
It has become possible to prevent the yoke from tilting. As a result, it is possible to eliminate all the above-mentioned various inconveniences associated with the inclination of the yoke in the jumper device for the overhead transmission line having a horizontal angle.

[Brief description of drawings]

FIG. 1 is a view of the vicinity of a yoke, which is a main part of a jumper device having a horizontal angle according to the present invention, as viewed from a longitudinal direction of a transmission line main line.

FIG. 2 is a right side view of FIG.

FIG. 3 is a view common to the present invention and the related art, and is a front view showing an entire jumper device for an overhead transmission line having a horizontal angle.

FIG. 4 is a view of a conventional jumper device for an overhead power transmission line viewed from a longitudinal direction of a power transmission line near a yoke, in a case where a load of a rigid jumper portion does not act on a supporting rod.

5 is a diagram in the case where a load of the rigid jumper portion acts on the support rod in FIG. 4, and is a diagram showing that the yoke tilts.

FIG. 6 is a plan view for explaining a conventional problem and is a vicinity of an anchorage portion of an overhead transmission line having a horizontal angle.

[Explanation of symbols]

 1 tension-resistant steel tower 2 transmission line main line (overhead transmission line) 3 pulling clamp 5 yoke 6 tension-resistant insulator string 7 jumper wire 8 rigid jumper part 9 flexible jumper part 10 support rod 11 arc horn 26 support rod mounting bracket 26a fixed part 26b Plate-shaped part 26c Support rod connecting hole (support rod connecting part) 27 Connecting pin 28,29 Link 30,31 Connecting pin

[Procedure amendment]

[Submission date] October 18, 1995

[Procedure amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0002

[Correction method] Change

[Correction contents]

[0002]

2. Description of the Related Art FIG. 3 shows a general structure of a suspension portion of an overhead transmission line in a tension tower. The power transmission line main line 2 is retained by the steel tower arm 1a of the tension resistant steel tower 1 through the strain clamp 3, the connecting metal fitting 4, the yoke 5, the tension insulator string 6, etc. The rigid jumper portion 8 is electrically connected through a jumper wire 7 including a jumper portion 8 and flexible jumper portions 9 on both sides thereof.
The vicinity of both ends of is supported by supporting rods 10 attached to the yoke 5. Reference numerals 11 and 12 are arc horns.
The flexible jumper section 9 is generally the main line 2 of the power transmission line.
The rigid jumper portion 8 is made of a stranded conductor to which a rigid material is added, an aluminum pipe conductor, or the like .

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Fig. 4

[Correction method] Change

[Correction contents]

FIG. 4

Claims (2)

[Claims] 1. A power transmission line main line (2) on both sides of a tension tower (1)
Of the support rods (1) attached to the yokes (5) as well as being fixed to the tower arm (1a) through the tension clamp (3), the yoke (5) and the tension insulator string (6).
0) supports near both ends of the rigid jumper part (8) in the jumper wire (7), and the rigid jumper part (8) is supported.
In the jumper device for an overhead power transmission line having a horizontal angle, which is formed by connecting between both ends of each of the detention clamps (3) with the flexible jumper parts (9) of the jumper wire (7), the yoke ( The support rod mounting metal fitting (26) is fixed to the lower surface of (5) and the support rod mounting metal fitting (2) is attached.
6), a jumper for an overhead transmission line having a horizontal angle, characterized in that support rod connecting portions (26c) capable of connecting the support rods (10) are provided at a plurality of positions in the projecting direction of the tower arm (1a). apparatus. 2. The supporting rod mounting metal fitting (26) is a plate-shaped portion (2) which is substantially vertical and is orthogonal to the longitudinal direction of the main line (2) of the power transmission line.
6), and the tower arm (1a) is attached to the plate-like portion (26).
The jumper device for an overhead power transmission line having a horizontal angle according to claim 1, wherein a plurality of connection holes (26c) are arranged in a line in the protruding direction.