JPH05284619A - Automatic earthing device for transmission line - Google Patents

Abstract

PURPOSE:To enable earthing work to be done safely and surely by connecting an earthing metal fitting, which can be lifted up and lowered by remote control on the ground, with a robot by an earth wire. CONSTITUTION:In case of performing power stop work, a portable power source 20 is connected to the control panel 6 provided on the ground or in its vicinity, and a robot 4 is stopped in the specified position of a rail 3. Next, by the push button operation of the control panel 6, an earthing metal fitting 9 is lowered toward the metal fitting 10 on charge side of a lower jumper cable so as to engaged with the metal fitting 10 on charge side by rotating the pulley 7 of the robot 4 thereby extending a string 8. As a result, the earthing is performed by the course of the earth metal fitting 10 on charge side the earth metal fitting 9 the earth wire 15 the robot 4 the rail 3 a pylon arm 2. Hereby, the dangerous earthing work can be performed safely and surely by the remote control from on the ground.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for surely short-circuiting the power supply side of a power transmission line and a steel tower arm in order to ensure the safety of workers when power outage construction is performed on the power transmission tower. The present invention relates to an automatic grounding device for a transmission line.

[0002]

2. Description of the Related Art When performing a power outage as described above,
In order to prevent electric shock accidents due to erroneous power transmission or contact with electric circuits, the occupational safety regulations stipulate that the transmission line and the tower arm should be short-circuited reliably. For this reason, conventionally, an operator operates an insulating rod having an electric wire gripping fitting at the tip to attach the electric wire gripping fitting to the jumper wire of the power transmission line, and connect the ground wire extending from the electric wire gripping fitting to the tower arm by the clamp fitting. The grounding method was adopted. But 50
In a high-voltage transmission line of 0 KV or more, the length of the insulator string is significantly lengthened, so that it becomes extremely difficult for the operator to operate an insulating rod with a length of several meters for grounding work if the wind blows. Was there.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and enables safe and reliable grounding work by operation from the ground even when the power-charging section of the power transmission line is greatly separated from the tower arm. It has been completed in order to provide an automatic grounding device for a power transmission line capable of carrying out.

[0004]

The present invention, which has been made to solve the above-mentioned problems, is a robot in which a rail is laid on the lower surface of a tower arm of a power transmission tower, and the rail can be run by remote control from the ground. In addition to installing the grounding metal fitting, the robot is equipped with a grounding metal fitting that can be lifted and lowered by remote control from the ground, and the grounding metal fitting and the robot are connected by a ground wire.

[0005]

The present invention will be described in more detail with reference to the embodiments shown in the drawings. In FIG. 1, 1 is a power transmission tower, and 2 is a tower arm. A rail 3 is attached to the lower surface of the steel tower arm 2, and an electric robot 4 is mounted on the rail 3. Reference numeral 5 denotes a storage box provided at the base of the steel tower arm 2, and the robot 4 is normally stored inside the storage box 5, but a control panel 6 provided with a portable power source 20 provided near the ground. It is structured so that it can travel on the rail 3 by operating the push button.

As shown in FIGS. 1 and 2, the robot 4 is provided with four front, rear, left and right pulleys 7 around which four cord-like bodies 8 such as chains or wire ropes are wound. There is. At the lower ends of these cord-like bodies 8 are grounding fittings 9
Is attached, and the grounding fitting 9 can be freely moved up and down by rotating the four pulleys 7 by remote control from the ground by operating the push button of the control panel 6. As shown in the figure, it is preferable that the attachment interval of the string-shaped body 8 on the robot 4 side is made wider than that on the grounding metal 9 side to prevent the rolling due to the wind.

3 and 4 are enlarged views of the grounding metal fitting 9 of the embodiment. As shown in FIG.
Further, both sides thereof are formed obliquely as shown in FIG. This is so that the grounding metal fitting 9 lowered by the string-like body 8 can surely be fitted to the power application side grounding metal fitting 10 by its own weight. As shown in FIG. 5, the power-supply-side grounding metal fitting 10 is provided on the upper side of the suspension member 12 of the jumper wire 11 so that it can be used as it is. ..

The grounding metal fitting 9 is such a grounding metal fitting 10 on the power-supply side.
It is lowered from above and fits into it, but a mechanism for pinching the power-supply-side grounding metal fitting 10 is provided so that the ground-metal fitting 9 is surely electrically connected to the power-supplying-side ground metal fitting 10 at this time. ing. As shown in FIG. 3, this mechanism is provided with a pair of rollers 13 and 13 on both sides of the power-supply-side grounding metal fitting 10 and presses the rollers 13 and 13 toward the power-supply-side grounding metal fitting 10 by springs 14 and 14. Has become. With this mechanism, the grounding metal fitting 10
Is surely connected to the grounding fitting 9.

A grounding wire 15 is provided between the grounding fitting 9 and the robot 4, and the upper end of the grounding wire 15 is wound around the roller 16 on the robot 4 side with a constant tension.
The grounding wire 15 is automatically pulled out or wound up when the grounding metal 9 is moved up and down by the string-shaped body 8, and the grounding metal 9 is electrically connected to the tower arm 2 via the robot 4 and the rail 3. Connecting.

[0010]

The automatic grounding device for a power transmission line of the present invention thus constructed is normally housed in the housing box 5, but is installed near the ground when power outage work is performed. A portable power source 20 is connected to the control panel 6, and a push button operation of the control panel 6 causes the robot 4 to travel along the rail 3 to the tip side of the tower arm 2 and automatically stop at a predetermined position. Next, by operating the push button on the control panel 6, the robot 4
The pulley 7 is rotated, the string-shaped body 8 is extended, and the connecting fitting 9 is lowered toward the power-supply-side grounding fitting 10 of the lower jumper wire 11. The grounding fitting 9 is, for example, a metal body having a weight of about 80 kg, and as described above, the attachment interval of the string-like body 8 on the robot 4 side is set to be wider than that on the grounding fitting 9 side, so that it is against a little wind. As a result, the grounding metal fitting 9 is securely fitted to the power-supply-side grounding metal fitting 10 without rolling.

Along with this, the roller 13 of the grounding metal 9,
13 is pressed toward the grounding metal fitting 10 by the springs 14 and 14. As a result, the grounding metal fitting 10 → grounding metal 9
→ Grounding line 15 → Robot 4 → Rail 3 → Steel tower arm 2 is grounded. Moreover, if the string-like body 8 is further loosened, an excessive force is not applied to the robot 4 and the power-supply-side grounding metal fitting 10 even if the jumper device is laterally shaken by a strong wind when left in this state, and the grounding metal fitting 9 is used. Is stably placed on the power-supply-side grounding metal fitting 10, so that the grounded state is reliably maintained.

After the work is completed, the pulley 7 of the robot 4 is rotated in the reverse direction to wind up the cord-like body 8 and the grounding metal 9
Is separated from the grounding side metal fitting 10 and the ground wire 15 is also automatically wound up on the roller 16 to release the ground.

The automatic grounding device of the power transmission line of the present invention is shown in FIG.
The present invention can also be applied to a suspension device such as a V suspension device shown in FIG. Further, if a power detection device that measures and detects an induced voltage or the like is mounted on the grounding side metal fitting 10, grounding work can be performed while determining whether or not power is being applied.

[0014]

As described above, the present invention is capable of safely and reliably performing dangerous grounding work by remote control from the ground, and is hardly affected by wind. Therefore, as an automatic grounding device for a transmission line that solves the conventional problems, it has a great contribution to the industry.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a side view showing a main part of the embodiment of the present invention.

FIG. 3 is an enlarged cross-sectional view showing a fitted state of a grounding metal fitting and a power application side grounding metal fitting.

FIG. 4 is another cross-sectional view showing, in an enlarged manner, the fitting state of the grounding fitting and the power-supply-side grounding fitting.

FIG. 5 is a side view illustrating a grounding side metal fitting provided on a jumper wire.

FIG. 6 is a front view showing an example in which the present invention is applied to a V suspension suspension insulator device.

[Explanation of symbols]

 1 Power transmission tower 2 Steel tower arm 3 Rail 4 Robot 8 String 9 Grounding metal fitting 10 Grounding metal fitting 15 Grounding wire

Claims (3)

[Claims] 1. A rail is laid on a lower surface of a steel tower arm of a power transmission tower, and a robot that can travel by remote control from the ground is mounted on the rail, and a grounding metal fitting that can be elevated and lowered by remote control from the ground is attached to the robot. An automatic grounding device for a power transmission line, characterized in that the grounding metal fitting and the robot are connected by a grounding wire. 2. The grounding metal fitting is attached to the robot by four cord-shaped bodies, and the robot-side mounting space of the cord-shaped material is made wider than that of the grounding metal fitting side to prevent rolling. Automatic grounding device for power transmission lines. 3. The automatic grounding device for a power transmission line according to claim 1, wherein the grounding metal piece is provided with a mechanism for pinching the grounding side metal fitting.