JPH0314916Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is applicable when tension-resistant insulators and jumper wires become long to prevent salt damage, or when the track has a horizontal angle and the jumper wires are placed inside. This invention relates to a jumper wire reinforcing device used to move jumper wires away from steel towers when storing them.

(Conventional technology) Conventionally, overhead wires between adjacent tower spans of high-voltage power transmission lines are held down using tie clamps, and jumper wires are connected to the tie clamps in order to prevent swinging of the jumper wires by running them under the sides of the towers. In some cases, a jumper wire reinforcing device is used in which a long support insulator for fixing the jumper wire is hung down from a steel tower, thereby fixing the jumper wire. However, this type of jumper wire reinforcing device has the disadvantage that the structure of the tower becomes complicated due to the installation of long support insulators for fixing the jumper wire, and it also has the disadvantage that the transmission voltage is high and the jumper wire is long, or when the transmission line is It has not been possible to effectively prevent the jumper wire from approaching the tower in cases where there is a horizontal angle in the direction of . Therefore, as shown in FIG. 7, a reinforcing rod 5 is installed on the conductor side of the insulator chain 50 to guide the jumper wire 51 in a direction away from the steel tower.
2 is attached to pull the jumper wire 51 away from the tower. However, due to the moment action due to the weight of the jumper wire 51 and the reinforcing rod 52, the jumper wire 51 returns to the tower side. It is difficult to secure insulation clearance between the insulators 50 and the insulators 50 are twisted due to this moment action, and unreasonable force is applied to the insulators 50. There was also a drawback that the insulator chain 50 could be damaged by falling ice and snow or by shaking due to wind.

(Problems that the invention attempts to solve) This invention solves the conventional problems as mentioned above,
Even when the jumper wire becomes long or the track has a horizontal angle, it is possible to pull the jumper wire sufficiently outward from the tower without complicating the structure of the tower and without causing undue twisting of the insulators. It was completed with the aim of creating a jumper wire reinforcing device.

(Means for solving the problem) The present invention is a connecting fitting between a conductor-side metal fitting of an insulator chain attached to a tower of a high-voltage power transmission line and a retaining clamp that grips the conductor held by the insulator chain. , has a weight mounted eccentrically on one side of the axis line connecting the insulator chain's steel tower attachment point and the conductor, the number of which can be increased or decreased, and slidable in the horizontal direction, and multiple swing angle adjustments on the opposite side of the above axis line. The present invention is characterized in that a jumper wire reinforcing metal fitting having a hole is attached, and a reinforcing rod for supporting the base of the jumper wire is attached to the swing-up angle adjusting hole of the jumper wire reinforcing metal fitting.

(Example) Next, the present invention will be described in detail with reference to the illustrated embodiment. 1 is a high-voltage power transmission line tower, 2 is an insulator chain attached to the tower 1, 3 is a metal fitting on the conductor side of this insulator chain 2, Reference numeral 4 denotes a retaining clamp attached to the conductor side of the insulator chain 2, and the conductor 5 is retained on the conductor side of the insulator chain 2 by this retaining clamp 4. Reference numeral 6 denotes a connecting fitting that is installed between the conductor side fitting 3 of the insulator chain 2 and the retaining clamp 4, and in this embodiment, it also serves as a horn mounting fitting for attaching the arcing horn 7. In this embodiment, the connecting fitting 6 is a double yoke. Reference numeral 8 denotes a jumper wire reinforcing metal fitting attached to this connecting metal fitting 6, and as shown in FIG. It has a weight 9 whose number can be increased or decreased, and has a plurality of swing-up angle adjustment holes 10 on the opposite side of the axis L. Weight 9
The bolt 12 is inserted into the long hole 11 of the jumper wire reinforcement fitting 8.
The swing-up angle adjustment hole 10 is arranged in a fan shape below the upper center hole 13. A curved reinforcing rod 15 that holds the base of the jumper wire 14 is attached to the swing-up angle adjustment hole 10 of the jumper wire reinforcing metal fitting 8 so that the angle can be freely adjusted. In addition, 16 is the grounding side metal fitting of the insulator chain 2, 1
7 is a connecting fitting on the grounding side, and 18 is an arcing horn.

4 and 5 show a second embodiment of the present invention, in which the insulator chain 2 is connected by connecting fittings 6 and 17, which are two yokes.
Since this embodiment is the same as that in the embodiment, corresponding parts are given the same reference numerals and explanations will be omitted.

(Function) In this structure, the insulator chain is attached to the connecting fitting 6 between the conductor-side metal fitting 3 of the insulator chain 2 attached to the tower 1 of the high-voltage power transmission line and the retaining clamp 4 that grips the conductor 5. Since the jumper wire reinforcing fitting 8 is installed on one side of the axis L connecting the steel tower attachment point A of No. 2 and the conductor 5, the jumper wire reinforcing fitting 8 has a weight 9 which can be increased or decreased in number eccentrically and is attached so as to be slidable in the horizontal direction. A counterclockwise rotational moment is generated in the reinforcing metal fitting 8 in FIGS. 3 and 5, and the reinforcing rod 15 attached to the swing-up angle adjustment hole 10 on the opposite side of the axis L is designed to absorb the weight of the jumper wire 14. The balance is maintained while being swung diagonally upwards away from the steel tower 1 against the clockwise rotational moment caused by the steel tower 1. In addition, the number of weights 9 can be increased or decreased, and they are attached so as to be able to slide freely in the horizontal direction, and the reinforcing rod 15 can freely adjust the swinging angle by using the plurality of swinging angle adjustment holes 10 of the jumper wire reinforcing metal fitting 8. Since it is installed so that it can be adjusted, it is easy to make fine balance adjustments. for example,
When a series tension insulator device consisting of six 250 mm clevis-type suspended insulators is used as the insulator chain 2, and hard copper stranded wires with a cross section of 55 mm ² are used as the conductor wire 5 and the jumper wire 14, the conventional In this case, the lifting angle of the reinforcing rod is η = 44°, the torsion angle δ = 15°, and the horizontal distance h = 240 mm between the jumper lines.
As shown in the figure, in the case of the first embodiment in which the weight 9 of w = 8 kg is attached at a distance l = 130 mm from the axis L, the torsion angle δ = 0, so the swing-up angle η = 44°. When this happens, h=400 mm, making it possible to provide a large insulation clearance between the jumper wire 14 and the steel tower 1. In this way, the jumper wire reinforcing device of the present invention can balance itself and does not cause twisting in the insulator chain 2, so even if the jumper wire 14 is shaken by falling ice or snow or shaken by the wind, the insulator will remain stable. Series 2 is not damaged. In addition, the jumper wire 14 is fixed to the conductor-side metal fitting 3 via the reinforcing rod 15, and has high rigidity and also has good damping performance against swinging of the jumper wire 14, so that the horizontal angle is Sufficient insulation clearance can always be ensured even when the wire is used on a power transmission line with a large diameter or when the jumper wire 14 becomes long.

(Effects of the invention) As is clear from the above explanation, the present invention is a state in which the reinforcing rod supporting the base of the jumper wire is swung diagonally in the direction away from the steel tower by a weight eccentrically attached to one side of the axis. Since the jumper wire can be balanced, even if the jumper wire becomes long or the power transmission line has a horizontal angle, the jumper wire can be pulled far away from the tower to ensure sufficient insulation clearance. Furthermore, since the jumper wire reinforcing device of the present invention can balance itself, it does not cause twisting of the insulator strands, and there is no risk of damaging the insulator strands even if they are subjected to falling ice or snow or shaking due to wind. Moreover, there is no need to install an insulator device or the like for fixing the jumper wire on the steel tower side, so there is no need to complicate the tower structure. In this way, the present invention eliminates the problems of the conventional jumper wire reinforcing device, and its practical value is extremely great.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a first embodiment of the present invention;
2 is a front view thereof, FIG. 3 is a partially cutaway right side view thereof, FIG. 4 is a plan view showing the second embodiment of the present invention, and FIG. 5 is a partially cutaway right side view thereof, and FIG. Figure 6 is a schematic plan view showing the relationship between the steel tower and the Jyampa line, Figure 7
The figure is a partially cutaway side view of a conventional jumper wire reinforcing device. 1: Steel tower, 2: Insulator chain, 3: Conductor side metal fitting, 4:
Retaining clamp, 5: Conductor, 6: Connecting metal fitting, 8: Jumper wire reinforcing metal fitting, 9: Weight, 10: Swinging angle adjustment hole, 15: Reinforcing rod, A: Steel tower attachment point, L:
Axis line.

Claims (1)

[Scope of utility model registration request] The pylon of the insulator strand 2 is connected to the connecting fitting 6 between the conductor-side metal fitting 3 of the insulator strand 2 attached to the pylon 1 of the high-voltage power transmission line and the retaining clamp 4 that grips the conductor 5 held by the insulator strand 2. A weight 9 is mounted eccentrically on one side of the axis L connecting the attachment point A and the conductor 5, the number of which can be increased or decreased, and is slidable in the horizontal direction, and a plurality of swinging angle adjustments are made on the opposite side of the axis L. A jumper wire reinforcing device characterized in that a jumper wire reinforcing fitting 8 having a hole 10 is attached, and a reinforcing rod 15 for supporting the base of the jumper wire 14 is attached to the swinging angle adjustment hole 10 of the jumper wire reinforcing fitting 8. .