JPH025458Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a suspended tension insulator device.

(Prior art) In recent years, with the progress of urbanization near power transmission lines, there has been a tendency for areas under the lines to lack ground clearance due to residential land development, etc., and there are cases where it is necessary to increase the ground clearance of the power lines at existing suspension towers. many. Possible countermeasures include raising the height of existing steel towers and adopting suspended tension insulators, but the former is expensive and less economical, while the latter causes uneven tension in power transmission lines. and the strength of the steel tower may be insufficient. That is, in the conventional suspended tension insulator device, a suspension mounting bracket and a balance yoke are inserted into the tower support point, and the tension insulator device is connected with pins to both ends of the yoke. When uneven tension occurs in a power transmission line, the transmission line installation point moves only by the tilting length of the balance yoke toward the high tension side, and the effect of damping the uneven tension is small. Extremely unbalanced tension, such as wire breakage between the two sides, can lead to the tower collapse.

(Purpose of the invention) The present invention has been completed with the aim of solving the above-mentioned drawbacks and providing a suspended tension insulator device that has an excellent effect of damping uneven tension.

(Structure of the invention) In the present invention, a hanging member is suspended from a mounting bracket attached to a steel tower arm, the lower end of an intermediate upright member is pivotally connected to the lower end of the hanging member, and the upper end of the intermediate upright member is The upper end of the vertical member to which the tension insulator device is connected to both lower ends is pivotally connected, and the intermediate upright member and the vertical member are connected by a shear pin that normally maintains the two in an overlapping state. The illustrated embodiment will be described in detail below.

In the figure, 1 is a mounting bracket that is attached to the tower arm of the power transmission line, 2 is a bifurcated hanging member suspended from the mounting bracket with a shaft pin 3, and 4 is a shaft pin 5 attached to the lower end of the hanging member 2. 2 whose lower end is pivoted with
The intermediate upright members 6 are substantially elongated triangular vertical members that are fitted between the intermediate upright members 4 and whose upper ends are pivotally connected to the upper ends of the intermediate upright members 4 with shaft pins 7. Tension-resistant insulator devices 9, 9 are symmetrically connected to the lower ends of this vertical member 6 with shaft pins 8, 8, and the A shear pin 10 is inserted near the middle of the shaft pin 5 and shaft pin 7 to normally maintain them in an overlapping state as shown in FIGS. 1 to 4, so that the intermediate upright member 4 and the vertical member 6 are connected. There is. In addition,
In the figure, 11 is a lightning arc horn provided at both ends of the tension insulator device 9, 12 is a power transmission line attached to the tip of the tension insulator device 9 via a tension clamp 13, and 14 is a vertical member 6. This is a guide wall extending from the lower part on both sides, and is for ensuring the stability of the intermediate upright member 4.

In this structure, as shown in FIG. 1, a vertical member 6 whose upper end is pivotally connected to the upper end of the intermediate upright member 4 is connected to the intermediate upright member 4 by a shear pin 10 that connects the two. The tension insulator device 9 connected to both ends of the lower side of the vertical member 6 applies equal tension to the left and right sides of the lower side of the vertical member 6. The hanging member 2 suspended from the mounting bracket 1, the intermediate upright member 4 whose lower end is pivoted to the lower end of the hanging member 2, and the vertical member 6 maintain an overlapping state on a vertical line, but for example, When the power transmission line 12 on the left side is disconnected, tension acts only on the right side, and the hanging member 2 is moved to the right side around the shaft pin 3 as shown in Fig. 4.
tilts, and as a result, the shear pin 10 has T・S/
A load of L is applied and the shear pin 10 is separated due to shear stress. Note that T is the tension of the power transmission line 12 on the right side, S is the distance between the shaft pin 7 and the shaft pin 8, and L is the distance between the shaft pin 7 and the shear pin 10. When the shear pin 10 is separated in this manner, the restraint between the intermediate upright member 4 and the vertical member 6 is released, and the intermediate upright member 4 rotates clockwise about the shaft pin 8 as shown in FIG. At the same time, the vertical member 6 rotates counterclockwise about the shaft pin 7, and the suspension member 2, intermediate upright member 4, and vertical member 6 are stabilized in a straight line. As a result, the length of the component parts of the suspension section is added to the actual length of the power transmission line by the sum of the lengths of these three members, so the uneven tension is significantly alleviated, and the collapse of the transmission line tower, etc. accidents are prevented.

Next, the suspended tension insulator device of the second embodiment shown in FIGS. The part has a long hole 15, and the long hole 1
The only difference from the first embodiment is that a buffer material 16 made of a soft metal such as lead is attached to the lower hole end of the hole.
Although there is no particular difference from the embodiment described above, as the shear pin 10 is separated, the intermediate upright member 4 rotates clockwise from the state shown in FIG. 15, and after breaking the buffer material 16 at the end of the hole, it stabilizes as shown in FIG. The length is further increased by the length, and the damping effect of uneven tension can be further increased. Note that the impact between the shaft pin 5 and the hole end is effectively absorbed by the buffer material 16, so that the hole end is not damaged.

(Effects of the invention) As is clear from the above explanation, the present invention allows the suspension member, intermediate upright member, and vertical member of the suspended tension insulator device to be extended to the tension side in response to a break in the power transmission line. Since it is added to the actual length of the transmission line, it is possible to sufficiently attenuate the uneven tension caused by disconnection.
This invention has the advantage of being able to prevent damage to the tower arm of the power transmission line, and that it can always maintain the same insulation distance between itself and the lower tower arm as when relying on conventional suspended tension insulators. This device has extremely great practical value as it solves the drawbacks of the conventional suspended tension insulator device.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing the first embodiment of the present invention, FIG. 2 is a partially cutaway front view of the main part,
Fig. 3 is a side view of the main parts, Fig. 4 is a partially cutaway front view showing the state immediately after the wire is broken, Fig. 5 is a partially cutaway front view showing the stable state after the wire is broken, and Fig. 6 is the FIG. 7 is a partially cutaway front view of the main part of the embodiment, FIG. 7 is a partially cutaway front view showing the state immediately after the wire is broken, and FIG. 8 is a partially cutaway front view showing the stable state after the wire is broken. 1: Mounting bracket, 2: Hanging member, 4: Intermediate upright member, 6: Vertical member, 9: Tension-resistant insulator device, 10: Shear pin, 15: Long hole, 16: Cushioning material.

Claims (1)

[Claims for Utility Model Registration] 1. A hanging member 2 is suspended from a mounting bracket 1 that is attached to a steel tower arm, and the lower end of an intermediate upright member 4 is pivoted to the lower end of the hanging member 2, and the intermediate upright member 4, the upper end of a vertical member 6 with tension-resistant insulators 9 connected to both lower ends thereof is pivoted, and the intermediate upright member 4 and vertical member 6 are always maintained in an overlapping state. A suspended tension insulator device characterized in that the device is connected with shear pins 10. 2 Place the lower end of the intermediate upright member 4 into the hole end with the cushioning material 1.
6. The suspended tension insulator device according to claim 1, which is registered as a utility model and has an elongated hole 15 with a hole 15 attached thereto.