JPH0237231Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a jumper device suitable for tension towers with large horizontal angles.

In recent years, with the increase in power transmission capacity, the power transmission voltage has become extremely high and the number of conductors has increased, and as a result, insulator devices have become larger.

In addition, because the route of the power transmission line is unavoidable due to geographical conditions, problems with land acquisition, and other reasons, it is inevitable that tension towers will be frequently used as transmission line support towers. Jumpers are also becoming larger.

The functions of this jumper include ensuring a sufficient ground insulation gap, suppressing the amount of lateral vibration, and being easy to mold or install the jumper itself. A jumper device has been proposed.

This invention reduces the number of expensive insulators used,
Moreover, it is an object of the present invention to provide a jumper device that can effectively suppress vibration of the device and provide a stable supporting function.

That is, in the present invention, the upper ends of the insulator chains are connected to both ends of the tower arm, and the upper ends of the connecting rods are connected to the wire side of the tension-resistant insulator device stretched from the middle part of the tower arm, and the insulator chains are connected to each other. A long column-shaped rigid weight is connected to the lower end of the connecting rod, and the insulator link and the connecting rod are each shaped like a V when viewed from the direction in which the power transmission line is installed and the direction perpendicular to the direction in which the power transmission line is installed. This is a jumper device in which a jumper is attached to the rigid weight.

Embodiments of the present invention will be described below with reference to the drawings.
In the figure, 1 is a steel tower, 2 is a steel tower arm, 3 is a tension insulator chain with one end connected to this arm 2, and 4 is a wire side metal fitting (line side tension yoke) 5 at the other end of this tension insulator chain 3. 6 is a jumper connecting these power transmission lines 4, and 7 is a jumper spacer interposed between these jumpers 6.

In the present invention, the upper end of the insulator chain 9 is connected to both sides of the tip of the tower arm 2 via ground metal fittings 8, and the wire side of the tension-resistant insulator device 3 is stretched from the middle part of the tower arm 2. Metal fittings (wire side tension yoke)
5 is connected to the upper end of a connecting rod 11 having a length adjustment function via upper connecting fittings 10, and the jumper side connecting fittings 12 are connected to the lower end of the insulator link 9, and the lower end is connected to the lower end of the connecting rod 11. A long columnar rigid weight 14 is horizontally bridge-connected to the lower part of the steel tower arm 2 via connecting fittings 13. In this case, the lower end of the insulator chain 9 is inclined toward the tower body 1 side, and the jumper side connecting fittings 12 and the lower connecting fittings 1
3 and the rigid weight 14 are the connecting fittings 12, 1.
3 and a joint fitting 15 protruding from the rigid weight 14 in the lateral swing direction (direction of contact with and separation from the tower body side);
Connected to allow slight rotation in the vertical direction (direction of horizontal movement almost parallel to the tower body side),
Further, the insulator chain 9 and the connecting rod 11 are constructed so as to have appropriate inclinations, respectively, as shown in FIG. 2 when viewed from a direction perpendicular to the direction in which the power transmission line 4 is installed.

Jumper clamps 17 provided at the tips of clamp support plates 16 fixed to both sides of the rigid weight 14 grip the jumper wires 6 hanging from the tension insulator device 3, respectively.

Further, the rigid weight 14 has an outer shell formed using a rectangular steel pipe 14a, and is filled with concrete 14b and hardened during construction on site.

In the figure, 18 is a shield ring provided on the insulator chain 9, 19 is a jumper horn provided on the rigid weight 14, and 20 is a ground side horn provided on the tower arm 2.

Since the present invention is constructed as described above, as shown in FIG. The distance from the line X connecting Can be done.

In addition, the setting position of the line side metal fitting (line side tension yoke) 5 is determined based on the tensioning conditions of the power transmission line 4 (the catenary angle and the horizontal angle θ of the line) and the amount of L in the vertical and lateral directions (in contact with the tower body side). Although it moves slightly in the vertical direction (the direction of horizontal movement substantially parallel to the tower body side), this can be absorbed by adjusting the length of the connecting rod 11. The jumper 6 is connected to the connecting rod 11, the tension insulator device 9, and the rigid weight 14.
can be kept stable at all times.

6 and 7 show another embodiment of the present invention, in which the same reference numerals as those described above indicate equivalent parts. This uses a pipe jumper 21, and this pipe jumper 21 has a rigid weight 14.
A hinge joint 2 is attached to the bottom of the frame-shaped metal fitting 22 attached to the
Pipe clamp 2 rotatably connected via 3
It is clamped at 4.

Note that the crossover wire 25 in FIG. 6 provides electrical connection between the pipe jumper 21 and the power transmission line 4.

Since the present invention is constructed as described above, it is possible to shorten the protrusion length of the tower arm from the tower body compared to the conventional tower arm equipped with a V-suspended insulator device, and it is also possible to shorten the distance between the transmission lines compared to the conventional tower arm. It can be made narrower.

In other words, in a conventional tower arm with a V-suspended insulator device, the two upper ends of the insulator device, which opens in a V-shape, are attached to the tower arm, so the protrusion length of the tower arm becomes long.

Further, according to the present invention, the number of expensive insulator links used can be reduced, and the frequency of electrical flashing can also be reduced.

Furthermore, according to the present invention, it goes without saying that the jumper does not sway in the lateral direction (the direction in which it moves toward and away from the tower body side), and the connecting rod attached to the line side metal fitting of the tension insulator device can be Since it is attached to the connection part with the weight or around the connection part, it has the effect of suppressing the shaking of the entire device in the vertical direction (the direction of horizontal movement almost parallel to the tower body side), suppressing the amount of swing of the device and supporting it. Since it is possible to provide a jumper device with stable functions, the present invention has the effect of contributing to the development of industry.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the invention, Fig. 2 is a side view thereof, Fig. 3 is a plan view thereof, Fig. 4 is a front view showing the main parts of the invention, and Fig. 5 is one thereof. FIG. 6 is a perspective view showing another embodiment of the present invention, and FIG. 7 is a partial side view showing a partially cut away side view. 1... Steel tower, 2... Steel tower arm, 3... Tensile insulator chain, 4... Power transmission line, 5... Line side metal fitting (line side tension yoke), 6... Jumper, 7... Jumper spacer , 8... Base metal fittings, 9... Insulator chain, 1
0... Upper connecting fittings, 11... Connecting rod, 12...
...Jumper side connecting fittings, 13...Lower connecting fittings, 14...Long columnar rigid weight, 15...Joint fittings, 16...Clamp support plate, 17...Jumper clamp, 18...Shield ring , 19...
...Jumper horn, 20...Earth side horn,
21...Pipe jumper, 22...Frame metal fittings,
23...Hinge joint, 24...Pipe clamp,
25...crossing line.

Claims (1)

[Scope of utility model registration request] The upper end of the insulator chain 9 is connected to both sides of the tip of the tower arm 2, and the upper end of the connecting rod 11 is connected to the line side of the tension insulator device 3 stretched from the middle part of the tower arm 2. A long column-shaped rigid weight 14 is bridge-connected to the lower end of the insulator chain 9 and the lower end of the connecting rod 11. The jumper device has a V-shape when viewed from a distance, and has a jumper 6 attached to the rigid weight 14.