JPS631315A - Jumper device in overhead transmission line - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a jumper device for an overhead power transmission line.

(Prior art) In the well-known jumper system for connecting overhead power transmission lines to each other at a steel tower; in In the case of high-voltage transmission lines with a relatively long tensile strength (v1) because the wires hang down in a catenary curve, it is difficult to maintain the necessary insulation distance between jumper wires of different phases, and as a result, the tower inevitably becomes larger. There was an inconvenience.

In order to avoid this inconvenience, recently, as shown in FIG. Supported via hanging rods 6, both ends of the rigid horizontal jumper conductor 5 and the main ff on each side
Hanging type jumper devices having a structure in which only the conductors at both ends connecting to the main line 3 are stranded conductors 7 similar to the main line 3 are being used frequently.

However, even with a - hanging type jumper device, in places near the coast where there is significant salt damage or where the power transmission voltage is high, it is necessary to have a sufficient length of the +J insulator chain 2, and for this reason, a rigid horizontal jumper is required. The length of the conductor 5 increases, causing vibration problems as described below.

(Problem to be Solved by the Invention) The rigid horizontal jumper conductor 5 is suspended from the yoke 4 via the hanging rod 6 in the shape of a swing, so that the rigid horizontal jumper conductor 5 is suspended from the yoke 4 via the hanging rod 6 in the shape of a swing. 5 is yoke =
Although it is possible to swing around the hanging support point 1, the problem of this invention is not this swing, but the swing in which the rigid horizontal jumper conductor 5 itself vibrates just like a string. First of all, it should be noted that this is a different issue.

The rigid horizontal jumper conductor 5 has a fundamental mode of vibration in which the entire length of the jumper conductor is half a wavelength, as shown in FIG. A second mode of vibration with the midpoint P of the jumper conductor as a node and a wavelength equal to the length of the jumper conductor as shown in h), or a third mode of vibration of the jumper conductor as shown in IA(c) of the same The equinoxes Q and R form a box, and the wavelength is 2.2 times the length of the jumper conductor. A standing wave vibration is generated, such as a third mode of vibration equal to /'3.

When such standing wave vibration occurs in a rigid horizontal jumper conductor, repeated stress is generated in the suspension supports at both ends, the jumper horn, the grounding fitting, etc. in the center, and the rigid horizontal jumper conductor plain wood and (Means for Solving the Problem) This invention was made to solve this problem, which causes fatigue of each metal fitting and its mounting bolt. In order to quickly attenuate and eliminate the standing wave vibration of the rigid horizontal jumper conductor that occurs, a vibration-absorbing elastic body is placed in direct contact with the rigid horizontal jumper conductor at at least one location on the rigid horizontal jumper conductor, or a separate member is installed. This is a junk device on an overhead power transmission line that is installed so that it makes indirect contact with the transmission line.

(Function) The vibrational energy of the rigid horizontal jumper conductor is converted into thermal energy within the vibration-absorbing elastic body that is in direct contact with it or indirectly through other members. In this way, even if vibrations occur in the rigid water jumper conductor, the vibrations are quickly damped.

Also, for the same reason, a rigid horizontal jumper conductor is less likely to vibrate from the beginning.

(Embodiment) An embodiment of the present invention will be described with reference to FIGS. 1 and 2.

The rigid horizontal jumper conductor 5 is suspended horizontally from the hanging port 6 through the hanging fittings 8 that hold the rigid horizontal jumper conductor gripping lamp portion 81 near its both ends. A vibration-absorbing elastic body 10 made of rubber or the like with high aging resistance is held under pressure in the center of a hanging bracket 8 that holds the horizontal jumper conductor 5. In other words, the vibration-absorbing elastic body 10 is and is arranged in indirect contact with the rigid horizontal jumper conductor 5.

In the embodiment shown in FIGS. 3 and 4, the vibration absorbing elastic body 1
It is housed in the form of a lining on the inner surface of the ramp section 91 for holding the rigid horizontal jumper conductor. In this example, as is clear from [\I], the vibration absorbing elastic body 10 comes into direct contact with the rigid horizontal jumper conductor 5.

In the embodiment shown in FIGS. 5 and 6, a lining-type vibration-absorbing elastic body IO is installed inside the ramp portion 111 for holding the rigid horizontal jumper conductor of the jumper horn 11. In the embodiment shown in Fig. 8, the vibration absorbing elastic body 1
0 is molded and housed in a shape that wraps the rigid horizontal jumper conductor gripping clamp part 121 of the grounding fitting 12 of a single rigid horizontal jumper conductor from the outside, and the rigid horizontal jumper 4 tree 5
are in direct contact with.

Furthermore, although not shown, the vibration-absorbing elastic body 10 may be attached to a separate intermediate spacer that separates the two rigid horizontal jumper conductors 5, instead of being attached to the metal fittings as described above. .

However, in this invention, even if the vibration-absorbing elastic body 10 is installed in any one of the hanging fittings 8, the grounding fitting 9, the jumper horn 11, etc., or even if any two of them are selected and placed, Alternatively, it is also effective to attach it to all metal fittings.

In the case of the embodiments shown in FIGS. 3 to 8, the rigid horizontal jumper conductor 5, the grounding fitting 9, and the jumper horn 1 are
1. Since it is necessary to ensure electrical continuity with the grounding metal fitting 12, the vibration absorbing elastic body 10 is made of a conductive material, such as conductive rubber mixed with carbon powder.

As can be seen from the embodiments described below, the common structure of the present invention is that whatever form the vibration-absorbing elastic body 10 takes, it is attached to at least one part of the rigid horizontal jumper conductor 5, either directly or by another member. This is, of course, a characteristic feature of the present invention.

Incidentally, as the rigid horizontal jumper 4 and the tree 5, a spout made of aluminum alloy or the like or a piece of tape may be used.

(Effects of the Invention) According to the present invention, since the vibration-absorbing elastic body is placed in contact with the rigid horizontal jumper conductor, the standing wave vibration generated in the 14-wire horizontal jumper conductor can be absorbed by the vibration-absorbing elastic body. Therefore, it is possible to effectively prevent stress concentration and damage to the rigid horizontal jumper conductor and various metal fittings caused by standing wave vibration. In addition, it has the following effects: (1) It has an extremely simple configuration, making it easy to apply to an actual overhead wire, and (2) It is possible to add a number of jumpers to an existing jumper device.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the main parts of a jumper device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line 1-11 in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. A partial side view showing the embodiment when installed, FIG.
A cross-sectional view taken along the 'l line, No. 7 [2I is Fig. 3 when the vibration-absorbing elastic body is installed in the (i $, ' part of the grounding fitting,
Figure 1 is a partial side view showing the fog embodiment, Figure 8 [7]
I is a sectional view taken from Figure 7 - ■i, No. 9171(a)
, (b). (c) is an explanatory diagram illustrating standing wave vibrations occurring in a striking horizontal jumper conductor, and FIG. 10 is a simplified side view of a conventional jumper device. 5... Rigid water jumper conductor, 8... Hanging metal μ, Su... Grounding metal fitting, ], O... Vibration absorbing elastic body, 11.
・Jumper horn, 12...Grounding fitting agent Attorney I: Mamoru Takeuchi 1rlA'#E2 Figure 3 Figure 4 Figure 7, (b) (C) 1°C

Claims (1)

[Claims] 1. The yoke (4) located between the tensile insulator chain (2) and the main line (3) and the vicinity of the end of the rigid horizontal jumper conductor (5) are connected via a hanging rod (6). The jumper is formed by connecting the main wire (3) and the end of the rigid horizontal jumper conductor (5) with a stranded conductor (7) to support the rigid horizontal jumper conductor (5). In the device, the vibration absorbing elastic body (10) is in direct contact with the rigid horizontal jumper conductor (5) at at least one location of the rigid horizontal jumper conductor (5), or indirectly in contact with the rigid horizontal jumper conductor (5) through another member. A jumper device for an overhead power transmission line, characterized in that the jumper device is provided in an overhead power transmission line. 2. The vibration-absorbing elastic body (10) is any one of the hanging fitting (8), the grounding fitting (9), or the jumper horn (11) of the rigid horizontal jumper conductor (5), or any two thereof; A jumper device for an overhead power transmission line according to claim 1, characterized in that the jumper device is installed at a location of all persons. 3. The vibration absorbing elastic body (10) is attached to the rigid horizontal jumper conductor gripping clamp portion (81, 91, 111,
121) A jumper device for an overhead power transmission line according to claim 1, characterized in that the jumper device is attached to the inner surface of the overhead power transmission line. 4. The vibration absorbing elastic body (10) is connected to the rigid horizontal jumper conductor gripping clamp portion (81, 91, 111) of each metal fitting.
, 121), the jumper device for an overhead power transmission line according to claim 1, wherein the jumper device is formed so as to cover the jumper device.