JPH038024Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to a suspended jumper device for electrically connecting the main lines on both sides of a steel tower in an overhead power transmission line. The structure of the jumper conductor is characterized by the structure of the part where the intermediate part in the length direction of the jumper conductor is attached and fixed to the suspension member.

[Prior art]

In a so-called hanging jumper device having a structure in which the jumper conductor is electrically connected to the main lines on both sides and the middle part of the jumper conductor in the longitudinal direction is supported by a hanging member, means for gripping the middle part of the jumper conductor. Various structures are known from patents, but the one actually used in actual lines is one in which the jumper conductor is attached and fixed to the suspension material using a bolt-tightening type conductor gripping fitting. It is something to do. In this case, the jumper conductor and the suspension material may be arranged horizontally or vertically (vertically), but a conventional example of the latter case is shown in Fig. 4 (in actual practice). Showa 58-83942
No. 2) is known. That is, the jumper conductors 2 are arranged above and below the suspension member 1, respectively, and the clamping fittings 4 are provided independently at the upper and lower ends of the conductor gripping fitting main body 3, respectively.
are each tightened and fixed to the main body 3 with bolts 5 to grip the upper and lower jumper conductors 2, and the central part of the main body 3 holds the suspension member 1 together with the fixing metal fittings 6, and is tightened and fixed with bolts 7.

[Problem that the invention attempts to solve]

In the conventional structure described above, bolts 7 are used to fix the fixing fittings 6 to the main body 3 at the upper and lower positions of the suspension member 1, and separate bolts 5 are used to attach the independent fastening fittings 4 to the main body. Since the jumper conductor 2 is held by tightening and fixing it to 3,
In other words, the fixing metal fittings 6 which have mounting seats for the bolts 7 at the upper and lower parts of the hanging frame 1, and the independent fastening metal fittings 4 which have separate mounting seats for the bolts 5 are arranged vertically. Because they are arranged side by side, the vertical dimension of the main body 3 becomes large. When the vertical dimension increases in this way, the area affected by the cross wind increases, and the amount of lateral deflection of the jumper conductor 2 increases. Taking this into account, if the support position of the jumper conductor 2 is set further away from the steel tower, the overhang length of the tower arm will become longer, leading to an increase in the size of the steel tower, which will increase the tower material cost, assembly cost, and land cost. This will lead to an increase in construction period.

This idea was made in view of the above points,
The size of the jumper conductor and the hanging member are made as small as possible not only in the lateral direction but also in the vertical direction, thereby making the entire hanging part more compact.

[Means for solving problems]

In this invention, the suspension member and the jumper conductor attached thereto are arranged close to each other in the vertical direction, and the jumper conductor is held between the gripping portions of a pair of left and right clamp members, and the base ends of both clamp members are It was secured to the hanging frame by means of horizontal fixtures passed through the hanging frame.

〔Example〕

FIG. 3 is a schematic side view of a jumper device according to an embodiment of this invention, in which a main line 10 of a multi-conductor power transmission line is connected to an arm of a steel tower 14 via a retaining clamp 11, a metal fitting 12 such as a yoke, and a tension insulator chain 13. The main wires 10 on both sides of the steel tower 14 are electrically connected to each other by jumper conductors 15 made of stranded wires connected at both ends to each retaining clamp 11 .

Hanging members 16 are connected to the metal fittings 12 on both sides, respectively, and these hanging members 16 support portions near both ends of a hanging member 17 made of a rectangular rod.

The two jumper conductors 15 are both disposed close to the suspension member 17 and below it, vertically side by side as shown in FIG. It is held by a plurality of conductor holding fittings 18 attached.

This invention connects the jumper conductor 15 to a suspension member 17.
The main feature is the configuration of the part attached and fixed to the handle.To explain this in detail, as shown in FIGS. The ends of the gripping parts 19a of a pair of clamp members 19, each consisting of a flat base end 19b, are connected by a pin 20, and two jumper conductors 15 are arranged vertically below the suspension member 17. are held between the gripping portions 19a of the left and right clamp members 19 via the spacer 21, the base ends 19b of both clamp members 19 are arranged opposite to each other on both sides of the suspension member 17, and a mounting device consisting of bolts and nuts is attached to these. 22 is passed through in the horizontal direction, and the base end portion 19b is fixed to the suspension member 17.

Note that the spacer 21 in the embodiment is attached to the clamp member 1.
Although it is separate from 9, it may be formed integrally.

Moreover, both clamp members 19 of the embodiment have pins 20
However, if the jumper conductor 15 can be strongly clamped by the grip portion 19a when the base end portion 19b of the clamp member 19 is fixed to the suspension member 17 with the fixture 22, it is not necessary to connect the two to each other.

〔effect〕

As explained above, according to this invention, the jumper conductor and the suspension member are arranged close to each other in the vertical direction, the jumper conductor is held between a pair of clamp members, and the base ends of both clamp members are attached to the suspension member. Since it is fixed to the suspension member using the horizontal fixtures passed through it, the horizontal dimension as well as the vertical dimension can be made as small as possible, making it possible to make the entire suspension part more compact. Furthermore, since the amount of lateral deflection during crosswind action is reduced, it becomes easier to secure an insulation distance to the tower, and it becomes possible to reduce the size of the tower by shortening the extension length of the tower arm.

The ends of the gripping parts of the pair of clamp members are connected with pins, and the jumper conductor is held between the gripping parts of the left and right clamp members via the spacer part, so the pair of clamp members can be attached to the mounting bracket. The clamping force of the jumper conductor that occurs when the jumper conductor is fixed by the pin becomes large due to the difference in distance between the jumper conductor and the fixture from the pin, and the jumper conductor can be securely fixed.

[Brief explanation of drawings]

Figures 1 to 3 show an embodiment of the suspension type jumper device of this invention. Figure 1 is a longitudinal sectional front view of the main part, Figure 2 is a side view of the same, and Figure 3 is the entire jumper device. FIG. 4 is a front view of a portion of the conventional suspended jumper device corresponding to FIG. 1. 10...main line, 12...metal fittings, 13...tensile insulator chain, 14...steel tower, 15...jumper conductor, 1
6... Hanging material, 17... Hanging material, 18... Conductor gripping fitting, 19... Clamp member, 19a... Gripping portion, 19b... Base end portion, 20... Pin, 21...
Spacer, 22...Mounting tool.

Claims (1)

[Scope of utility model registration request] A jumper conductor 1 electrically connected on both sides to the tension-supported main line 10 on both sides of the steel tower 14.
5 is a jumper device which is attached and fixed to a suspension member 17 whose both ends are suspended from the metal fittings 12 located between the tensile insulator chain 13 and the main line 10 on both sides of the steel tower 14 via suspension members 16. The suspension member 17 and the jumper conductor 15 attached to the suspension member 17 are arranged close to each other in the vertical direction, and the jumper conductor 15 is clamped by the gripping portions 19a of the pair of left and right clamp members 19. The base end 19b of the clamp member 19 is fixed to the suspension member 17 by a horizontal fixture 22 that penetrates the suspension member 17, and the ends of the gripping portions 19a of the pair of clamp members 19 are connected to each other. pin 20
A suspension type jumper device for an overhead power transmission line, characterized in that the jumper conductor 15 is sandwiched between the holding portions 19a of the left and right clamp members 19 via the spacer 21 portion.