JPH0113610B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tensioning device mounting bracket for attaching a conductor tensioning device to a steel tower arm having an angle structure.

In recent years, with the growth in demand for electricity, the development of ultra-super-high-voltage, large-capacity power transmission has been actively promoted, and along with this, plans are being made to make conductor tension devices, transmission towers, etc. stronger and larger.

By the way, as shown in FIG. 1, the conventional tension device mounting bracket connects a flat board 2, which is provided with connecting fittings 1 on both sides (or one side) of the conductor tension device, to the tip of a steel tower arm 3. It was attached to the lower surface via a batten 4. Therefore, both sides of the board are made to protrude outside the tower arm so that the tower arm 3 and the vertically movable connecting fitting 1 do not interfere with each other, and this has the disadvantage of increasing the size of the board 2. Generally, the structure of the tip of a steel tower arm is such that the upper and lower parts of the flat plate-like vertical member 5 are held together by a pair of angles 6 and 7, respectively, and the battens 8 and 4 are connected to the upper and lower end surfaces with the palms of hands together. Since the tension device mounting bracket was attached to the lower end batten 4, the tip of the tower arm had the disadvantage that it was subjected to large torsional force due to external force acting on the tension device mounting bracket. Therefore, the above-mentioned conventional tension device mounting brackets and tower arm tips are unsuitable for ultra-super high voltage, large capacity power transmission where extremely large external forces are generated, and drastic countermeasures are desired.

In view of the above points, the present invention aims to strengthen the tension device mounting bracket and the tip of the tower arm with a relatively simple structure, and also to strengthen the tip of the tower arm. The purpose of this is to provide a tension device mounting bracket that does not generate torsional force or couple force due to the device, and is therefore suitable for ultra-high voltage, large capacity power transmission. A support shaft is installed on the vertical wall of the box-shaped main body that is inserted between the beams and connected to the upper and lower beams, and a conductor tension is attached to the other end of the support shaft. It is characterized by rotatably attached two connecting fittings provided with device attachment parts.

The present invention will be specifically described below based on embodiments shown in the drawings. In FIGS. 2 to 5, the tension device mounting bracket 11 has a box-shaped main body 15 formed by integrally forming an upper surface portion 12, a lower surface portion 13, and both vertical wall portions 14 connecting these. Upper surface part 1 of main body part
2 and the lower surface part 13, a support shaft 17 is installed horizontally in the center of both vertical wall parts 14, and connecting fittings 18 and 19 are made to face this support shaft so as to be rotatable. It must be installed.
In this embodiment, a second
A vertical wall portion 20 is integrally formed with the upper surface portion 12 and the lower surface portion 13, the connecting metal fitting 18 is loosely fitted into the vertical wall portion 20 with its bifurcated bearing portion 21, and the connecting metal fitting 19 is loosely fitted into the vertical wall portion 20 with its bifurcated bearing portion 22. 18 and both vertical wall portions 14 to connect these two connecting fittings to both vertical wall portions 1.
4. It is supported by a support shaft 17 inserted through the second vertical wall portion 20. The other end portions of the connecting fittings 18 and 19 form a mounting portion for attaching a conductor tension device, for example, a clevis portion 23 for attaching a tower-side yoke of the conductor tension device.

The tension device mounting bracket 11 is inserted between the upper and lower beams of the tower arm end portion 24 of the power transmission tower, and is attached to the upper and lower beams using connectors.
That is, the upper beam 27 of the tower arm tip 24, for example, the batten 25, is clamped by a pair of angles 26, and the upper surface part 12 is bolted to the lower surface of the upper beam 27, with the palms of hands joined together, via the batten 28, if necessary. The lower surface part 13 is attached to the upper surface of the lower beam 31 with the lower beam 31 in a state where the palms are joined by clamping the lower beam, for example, the batten 29 with a pair of angles 30, and the lower surface part 13 is attached with bolts and nuts via the batten 32 as necessary. Due to this, the tip of the tower arm 24
A tension device mounting bracket 11 is integrally disposed in the center of the frame.

Therefore, in the tension device mounting bracket according to the present invention, since the box-shaped main body 15 also serves as a part of the tower arm tip 24, the material of the tower arm tip 24 can be saved. However, because of the box-shaped structure, it is possible to increase the strength and rigidity of the tension device mounting bracket 11 and the tower arm tip 24. Since the support shaft 17 that supports the connecting fittings 18 and 19 is located on the central axis of the tower arm tip 24, the external force acting on the support shaft 17 at the tower arm tip, that is,
No twisting force or corner force is generated due to the tension of the conductor tension device. Therefore, the tip of the tower arm can be made smaller and lighter. Also, the main body part 1
Since the connecting fittings 18 and 19 are supported by one support shaft 17, the width of the main body portion 15 in the track direction can be made relatively narrow.

As explained above, in the present invention, with a relatively simple structure, the tension device mounting bracket is able to strengthen the stiffener and the tip of the tower arm. Since the structure does not generate twisting force or couple force due to the conductor tension device, it is particularly suitable for ultra-super high voltage, large capacity power transmission.

[Brief explanation of drawings]

Figure 1 is a side view of a conventional product attached to a tower arm, Figure 2 is a perspective view showing an embodiment of the present invention, and Figure 3 is a state in which the product shown in Figure 2 is installed at the tip of the tower arm. Fig. 4 is a side view showing A of Fig. 3.
-A sectional view taken along line A; FIG. 5 is a sectional view taken along line BB in FIG. 3; 11... Tension device mounting bracket, 14... Vertical wall section, 15... Main body section, 17... Support shaft, 18, 19
...Connection fitting, 23... Clevis part, 24... Steel tower arm tip.

Claims (1)

[Claims] 1. A support shaft is installed on the vertical wall of the box-shaped main body that is inserted between the upper and lower beams at the tip of the tower arm and connected to the upper and lower beams,
A tension device mounting bracket is formed by rotatably attaching two connecting fittings each having a conductor tension device mounting portion at the other end to this support shaft.