JPS5847776Y2 - Grounding roller for overhead power transmission lines - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a grounding roller for overhead power transmission lines.

When installing overhead power lines, if the power line being installed approaches or crosses existing live wires, high voltage will be generated in the power line due to the effects of electrostatic induction and electromagnetic induction. Appropriate guidance prevention measures must be taken accordingly.

As a preventive measure against this, conventionally, grounding rollers having aluminum rollers have been placed near the track rolling cars, near the metal wheels of the steel towers, and near the winches, and the grounding rollers that come into contact with the aluminum rollers Grounding is done using a lead wire.

By the way, the installation of overhead power transmission lines is generally done by connecting the metsenger wire and the steel-core aluminum stranded wire for the transmission line via a girder, and indexing it with a winch through a metal wheel installed on a steel tower. There is.

However, especially in the vicinity of the metal wheel, the steel core aluminum stranded wire is subject to its own weight, and the aluminum stranded wire may pass rapidly while being caught between the metal wheel and the ground roller.
There was a problem in that external forces acted on the aluminum strands, causing slight distortions such as dents.

Such distortion is undesirable because it may cause vibration fatigue and eventually breakage of the strands, as well as reduce the commercial value.

The present invention has been made to solve these difficulties, and is an overhead power transmission line that includes a frame body that straddles the overhead power transmission line to be grounded, and a roller that is attached to the frame body and comes into contact with the overhead power transmission line. In the grounding roller, at least the contact surface of the roller with the overhead power transmission line is formed of rubber, and a grounding brush is provided that is resiliently sprung by a spring and comes into contact with the overhead power transmission line, and this grounding brush is electrically connected. An object of the present invention is to provide a grounding roller for an overhead power transmission line, characterized in that a connected flexible grounding lead wire is provided.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

As shown in FIG. 1, the appearance of the overhead power transmission line roller according to the present invention is constructed by fixing a waist 2° 2' to the bottom of a rectangular frame 1.

3' is a grounding lead wire.

As shown in FIG. 2, inside the frame 1, there are rollers 4.
4' is provided.

The rollers 4, 4' have shafts 5,
5' is provided with a groove 6 (FIG. 3) through which the overhead power transmission line 3 passes.

Note that the rollers 4, 4' are attached to the shafts 5, 5'.
A ring 7.7' is provided to be placed in the center of the ring.

The rollers 4, 4' may be made entirely of rubber, or may be formed with grooves 6.
It is made up of rubber covered.

Further, within the frame body 1, brushes 8... are fixed to a fixing member 9 (FIG. 4), and brushes 8...
* is configured to be bundled by a support member 10, resiliently pushed by a spring 11, and pressed against the overhead power transmission line 3.

A grounding node line 3' is connected to the other end of the brush 8 and extends outside the frame 1.

Thus, the groove surfaces of the rollers 4 and 4' and the brushes 8 and
... is disposed within the frame so that one end is in a straight line, and constitutes the grounding roller of the present invention.

Note that the method of using the present invention is no different from that of conventional ground rollers.

As explained above, according to the present invention, the roller of the grounding roller is made of rubber or rubber-covered, and the spring-loaded brush is brought into contact with the electric wire, so that the electric wire is suddenly pulled and installed. Even in such cases, the rubber acts as a cushioning material, and the brushes are pressed against the wires with a small enough contact pressure to ground them, so there is no risk of dents, etc., thus reducing vibration fatigue and, ultimately, vibration fatigue. It can eliminate the cause of line breakage and is highly effective.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the grounding roller according to the present invention, Fig. 2 is a partially cutaway front view of the same embodiment, and Fig. 3 is a cross section taken along line III-III in Fig. 2. 4 is a cross-sectional view taken along line IV--IV in FIG. 2. 1... Frame body, 2.2'... Weight, 3
...Overhead transmission line, 4,4'...Roller, 8...Brush, 3'...To ground lead

Claims (1)

[Scope of utility model registration request] A grounding roller for an overhead power transmission line comprising a frame body spanning an overhead power transmission line to be grounded, and a roller installed in the frame body and in contact with the overhead power transmission line, wherein the roller:
Forming at least the contact surface of the overhead power transmission line with rubber,
For an overhead power transmission line, characterized in that a grounding brush is provided which is springed from a spring and comes into contact with the overhead power transmission line, and a flexible grounding lead wire electrically connected to the grounding brush is provided. ground roller.