JPS6142488B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power transmission line jumper device particularly suitable for ultra-high voltage power transmission lines. Conventionally,
Figures 1 to 3 are used as jumper devices for power transmission lines, mainly for the purpose of downsizing the entire steel tower.
As shown in the figure, the intermediate portion of a plurality of jumper conductors 4 extending substantially horizontally in the same vertical plane between the tips of the upper arm 2A and the lower arm 2D that are overhanging and fixed to the side surface of the tower body 1. are connected to each other by vertical jumper insulator chains 3 arranged on the same vertical line in the same plane, and the ends of the jumper conductors 4 are connected to the tower body 1 through tension insulator chains 9, respectively. A structure in which the main line 10 is electrically connected to the corresponding main line 10 via a retaining clamp 11 has been proposed (Japanese Patent Laid-Open No. 150892/1983). According to this proposed jumper device, the intermediate portions of the plurality of jumper conductors 4 are interconnected by the vertical jumper insulator chain 3 disposed between the tips of the upper arm 2A and the lower arm 2D. It is possible to almost completely prevent the conductor 4 from rolling, and therefore the distance L between each jumper conductor 4 and the tower main body 1 can always be maintained at the required minimum insulation interval. The protrusion length of 2D can be significantly shortened, and the arms are the upper arm 2A and the lower arm 2D.
Since there is no intermediate arm, the distance between both arms 2A and 2D is only the length of the vertical jumper insulator chain 3 having the required leakage length, and the height of the steel tower is made as low as possible. Therefore, the height of the tower body 1 and its cross-sectional area are reduced, and each arm 2
By reducing the lengths of A and 2D and their cross-sectional areas, the entire tower can be made three-dimensionally smaller. However, in the jumper device according to the above proposal, the entire length of the jumper insulator chain 3 between the upper arm 2A and the lower arm 2D becomes extremely long. Differences in the overall length of the insulator strings tend to occur, and therefore, for example, if the overall length of the jumper insulator strings is shorter than the vertical distance between the upper and lower arms, the jumper insulator strings can be easily connected between the upper and lower arms. If the jumper insulator chain is longer than the vertical distance between the upper and lower arms and the overall length of the jumper insulator chain is longer than the vertical distance between the upper and lower arms, the jumper insulator chain is Significant sagging occurs in the jumper conductor, resulting in the inconvenience that the original objective effect of preventing the jumper conductor from rolling when wind pressure is applied cannot be achieved.

The object of the present invention is to provide a jumper device that can advantageously solve the above problems.

Embodiments of this invention will be described below with reference to FIGS. 4 to 7.
To explain in detail with reference to the drawings, FIGS. 4 to 6 show an embodiment of the first invention of this application, in which an upper arm 2A and a lower arm are provided on the side surface of the tower main body 1. 2D are fixed and extended vertically at intervals, and these arms 2A, 2D
Intermediate portions of a plurality of jumper conductors 4 are disposed between the tip portions of the jumper conductors 4, which extend substantially horizontally and are made of elementary conductors 41 such as ordinary flexible twisted wires arranged in parallel and in a cylindrical shape as a whole. There is. The upper arm 2A, the intermediate portion of the plurality of jumper conductors 4, and the lower arm 2D, which are adjacent to each other in the vertical direction, are connected to a pair of left and right vertical jumper insulator chains 7, which extend in the vertical direction.
7', and the lower ends of these jumper insulators 7, 7' are connected by jumper insulators 7, 7'.
For example, a turnbuckle mechanism 12 is provided for adjusting the overall length of 7'. Further, the end of each jumper conductor 4 is electrically connected via a retaining clamp 11 to each corresponding main line 10 which is connected to the tower main body 1 via a tension insulator link 9, respectively. Here, the jumper insulator chains 7 and 7' supporting each jumper insulator chain 4 are connected to the jumper conductor 4.
It is supported by each arm 2A, 2D at a position outside the main wire tension insulator chain 9 so that the intermediate portion of the main wire tension insulator chain 9 extends outward beyond the tension positions at both ends thereof.

Each jumper insulator chain 7, 7' and each arm 2
A, 2D and the intermediate part of the jumper conductor 4 are explained in more detail with reference to FIG. , an intermediate connecting piece 14 is rotatably attached to the lower surface side of the upper arm 2A via a shaft pin 13 parallel to the horizontal protrusion direction of the upper arm 2A, and the lower part of the intermediate connecting piece 14 is attached to the shaft pin 13. The upper ends of the jumper insulator chains 7, 7' are rotatably attached via a second shaft pin 15 that is perpendicular to the axial direction of the jumper insulator series 13 and horizontal, so that the jumper insulator series 7, 7' is configured to be universally rotatably attached to the upper arm 2A. In addition, at the connecting portion B between the jumper insulator series 7, 7' and the intermediate portion of each jumper conductor 4, an annular frame is provided for holding the plurality of elementary conductors 41 constituting the jumper conductor 4 arranged in a cylindrical shape as a whole. Support pieces 16 and 16' are attached to the upper and lower parts of the body 42, respectively, and the upper support piece 16 and the lower ends of the jumper insulator chains 7 and 7' above the support piece 16 are connected to a shaft pin 17 parallel to the shaft pin 15. The upper ends of the lower jumper insulator chains 7, 7' are attached to the lower support piece 16', and the upper and lower support pieces 16, 16' are connected to each other so as to be rotatable. They are interconnected by members 18. Further, in the connecting portion C between the jumper insulator chains 7, 7' and the lower arm 2D, the lower end of the turnbuckle mechanism 12 connected to the lower ends of the jumper insulator chains 7, 7' is parallel to the horizontal protrusion direction of the lower arm 2D. It is rotatably attached to the upper surface of the lower arm 2D via a shaft pin 19.

In the embodiment shown in FIGS. 4 to 6, each jumper insulator chain 7, 7' and each arm 2A,
2D and the connection part A with each jumper conductor 4,
Since B and C are each rotatable, even if wind pressure is applied in the direction of swinging the jumper conductor 4, the impact will apply unreasonable force to each of the connecting parts A, B, and C, causing these connecting parts A to , B, and C can be effectively prevented from being damaged or fatigued.

In the above embodiment, the turnbuckle mechanism 12 is provided at the lower end of each row of jumper insulators 7, 7', but it may also be provided at the upper end of each row of jumper insulators 7, 7'. Furthermore, it may be inserted in the intermediate portion of the jumper insulator series 7, 7'.
Furthermore, the jumper insulator series for fixedly supporting each jumper conductor 4 between the upper arm 2A and the lower arm 2D do not necessarily need to be arranged in two rows on the left and right 7, 7' as in the above embodiment. Instead, the present invention may be implemented by appropriately increasing or decreasing the number of rows of these insulators to one or three or more, and furthermore, the jumper conductor 4 may be made of an intermediate conductor portion having a rigidity equal to the number of good conductive metal materials and its It may also be constructed by having flexible end conductor portions at both ends that are also made of a highly conductive metal material.

FIG. 7 is a side view showing an embodiment of the second invention of this application, and since the front view of FIG. 7 is substantially the same as FIG. 4, it will be omitted. In this second invention, the jumper conductor 4 in the first invention described above is a rigid jumper portion 4 made of a relatively lightweight, highly conductive rod-shaped rigid body such as an aluminum pipe, an aluminum rod, an aluminum channel, etc.
A, and a flexible jumper section 4B made of normal flexible twisted wires at both ends (however, in the case of an ultra-high voltage power transmission line, a flexible jumper conductor 4B made of ordinary flexible twisted wires at both ends) A plurality of rigid jumper parts 4A extend in the horizontal direction between the upper arm 2A and the lower arm 2D. They are arranged vertically at intervals. The tip of the upper arm 2A and the vicinity of one longitudinal end (near the left end in FIG. 7) and the vicinity of the other end (near the right end in FIG. 7) in the length direction of the rigid jumper portion 4A located below the tip are as follows. They are connected via a left upper jumper insulator series 7A and a right upper jumper insulator series 7A', which extend in the vertical direction and are respectively inclined so as to form an inverted V shape in a vertical plane extending in the width direction of the upper arm 2A. , and each vertically adjacent rigid jumper part 4
The vicinity of one end and the vicinity of the other end in the length direction of A are connected to each other by a substantially vertical left middle jumper insulator series 7B and a right middle jumper insulator series 7B' that extend in the vertical direction, and are further connected to the bottom end. The positions of the rigid jumper portion 4A near one end and the other end in the length direction and the lower arm 2D located below are arranged in a V-shape within a vertical plane extending in the width direction of the lower arm 2D. They are connected via a left lower jumper insulator series 7C and a right lower jumper insulator series 7C' which are arranged at an angle and extend in the vertical direction, and furthermore, a left lower jumper insulator series 7C and a right lower jumper insulator series 7.
A turnbuckle mechanism 12 is provided at each lower end of C'. Each of the flexible jumper parts 4B extending from the end of each rigid jumper part 4A connects a retaining clamp 11 to each corresponding main line 10 connected to the tower main body 1 via a tension insulator link 9, respectively. are electrically connected via the Here, the left upper jumper insulator series 7A, the right upper jumper insulator series, the left lower jumper insulator series 7C,
The lower jumper insulator chain 7C' on the right side is connected to the upper arm 2A and the lower jumper at a position outside the tension insulator chain 9 for main line tensioning so that each rigid jumper part 4A extends outward from the main line 10 tensioning position. Each is attached to arm 2D.

In this embodiment, each jumper insulator 7
A, 7A'; 7B, 7B'; 7C, 7C' and the rigid jumper section 4A, the upper jumper insulator series 7A, 7A' and the lower jumper insulator series 7C, 7
It is desirable that the connecting portions between C' and the upper arm 2A and the lower arm 2D be constructed so as to be mutually rotatable, as in the embodiment of the first invention described above (FIG. 6).

Further, in the above-described embodiment, the turnbuckle mechanism 12 is connected to the lower jumper insulator series 7 on the left and right sides.
Although these are provided at the lower ends of jumper insulators 7A and 7A' on the left and right sides, they may also be inserted in the middle jumper insulators 7B and 7B' on the left and right sides. Well, the point is, each row of jumper insulators 7A, 7B, 7C; 7A',
It is sufficient to provide them at 7B' and 7C' respectively.

According to the first invention of this application, a turnbuckle mechanism for adjusting the length of the jumper insulator chain that interconnects the upper arm and the lower arm and a plurality of jumper conductors arranged between these arms is provided. Even if there is a difference in the distance between the upper arm and the lower arm and the overall length of the jumper insulator chain due to variations in construction, etc., the turnbuckle mechanism allows the overall length of the jumper insulator chain to be adjusted. For example, if the length of the jumper insulator chain is shorter than the vertical distance between the upper and lower arms, the length of the jumper insulator chain can be easily adjusted by adjusting to extend the overall length of the jumper insulator chain. can be easily interposed and connected between the upper and lower arms, and conversely, if the length of the jumper insulator chain is longer than the vertical distance between the upper and lower arms, it can be adjusted to shorten the overall length of the jumper insulator chain. This makes it possible to easily remove slack in the jumper insulators, and therefore, in any case, each jumper conductor is fixedly supported by the jumper insulators, which are always stretched and maintained at an appropriate tension. Therefore, effects such as being able to reliably prevent the occurrence of lateral deflection of each jumper conductor can be obtained.

Further, according to the second invention of this application, the first invention
In addition to the effects similar to those of the invention described above, in particular, the middle part of the jumper conductor is constituted by a rigid jumper part, and the upper arm and the vicinity of both ends of the lower rigid jumper part are reversed. A more preferable framework structure is constructed in which the lower arm is connected by a V-shaped jumper insulator chain, and the lower arm and the vicinity of both ends of the upper rigid jumper part are connected by a V-shaped jumper insulator chain. Therefore, the jumper conductor can be more reliably and firmly fixed and supported to prevent it from rolling or rotating in a horizontal plane with respect to its center position.

[Brief explanation of the drawing]

Figures 1 to 3 show an example of a conventional jumper device for power transmission lines, in which Figure 1 is a partially omitted perspective view, Figure 2 is a side view, and Figure 3 is a partially front view. be. FIG. 4 is a front view showing an embodiment of the first invention of this application, FIG. 5 is a side view thereof, FIG. 6 is an enlarged front view of the main part thereof, and FIG. FIG. 2 is a side view showing an embodiment of the invention. In the figure, 1 is the tower body, 2A is the upper arm, 2D is the lower arm, 4 is the jumper conductor, 4A is the rigid jumper part, 4B is the flexible jumper part, 7 and 7' are the jumper insulators, and 7A is the left upper jumper. Insulators,
7A' is the right upper jumper insulator, 7B is the left middle jumper, 7B' is the right middle jumper, 7C is the left lower jumper, 7C' is the right lower jumper, 10 is the main line, 12 is the turnbuckle. The mechanism is shown.

Claims (1)

[Scope of Claims] 1 Between the upper arm and the lower arm that are extended and fixed to the tower main body, intermediate portions of a plurality of jumper conductors extending horizontally are arranged vertically at intervals, and The upper arm adjacent to the jumper conductor, the intermediate portion of the plurality of jumper conductors, and the lower arm are interconnected by a jumper insulator chain extending in the vertical direction, and this jumper insulator chain is provided with a turnbuckle mechanism. A jumper device for a power transmission line, characterized in that each section is connected to a corresponding main line. 2. The jumper device for a power transmission line according to claim 1, wherein the jumper conductor is formed of a rigid jumper section in the middle and flexible jumper sections at both ends thereof. 3. A plurality of rigid jumpers extending in the horizontal direction are vertically spaced apart between the upper arm and the lower arm that are extended and fixed to the tower main body, and the upper arm and the rigid jumper located below it are arranged vertically at intervals. The upper left jumper insulator series and the upper right jumper are arranged at an inclination in an inverted V-shape in a vertical plane extending in the width direction of the upper arm, near one end and the other end in the longitudinal direction of the jumper part. The middle jumper insulator link on the left side and the middle step on the right side are connected by a jumper insulator link, and the vicinity of one end in the longitudinal direction of each vertically adjacent rigid jumper part and the vicinity of the end of the other side extend in the vertical direction. In a vertical plane in which the lower arm and the vicinity of one end and the vicinity of the other end of the rigid jumper section located above the lower arm are interconnected by jumper insulators and extend in the width direction of the lower arm. The lower jumper insulator series on the left side and the lower jumper insulator series on the right side are arranged at an angle in a V-shape, and are connected to each other by the lower jumper insulator series on the left side and the lower jumper insulator series on the right side, and a turnbuckle mechanism is provided in the row formed by each jumper insulator series on the left side and the row formed by each jumper insulator series on the right side, respectively. A jumper device for a power transmission line, wherein the ends of each of the rigid jumper portions are connected to a corresponding main line via a flexible jumper portion.