JPH05207631A - Apparatus for dropping snow from transmission line - Google Patents

Abstract

PURPOSE:To implement miniaturization of the apparatus, to reduce the cost, and to make it possible to drive a plurality of snow removal spiral rods wound around multiple transmission lines by use of a common driving apparatus. CONSTITUTION:One end of a snow removal spiral rod 3 is connected to a hauling mechanism 14 through a connecting line 12, and at the same time, the other end of it is fixed to an electric line 1 through a spring 11. The structure is so arranged that before a snow removal, the some removal spiral rod 3 is drawn by the hauling mechanism 14 for a given distance, and then, at the time of snow removal, the tension exerted by the hauling mechanism 14 is released to give a linear motion to the snow removal spiral rod 3 by the restoring force of the spring 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snowfall device for a power transmission line which prevents the power transmission line from being damaged by snow, and more particularly to a snowfall device for a power transmission line which is downsized and reduced in cost.

[0002]

2. Description of the Related Art When snow falls on a power transmission line, and the rotation of the power transmission line expands to form snow cubes, the weight of the snow causes excessive tension on the wires.
A wire breakage accident may occur, or abnormal vibration such as three-jump or galloping may occur due to wind pressure, which may lead to a serious accident such as a short circuit between phases or a tower collapse.

Therefore, in order to avoid such a problem,
A snow removal spiral rod, which is preformed to have an inner diameter larger than the outer diameter of the wire, is wound around the outer circumference of the wire, and the drive device causes the snow removal spiral rod to reciprocate on the wire, thereby removing snow from the wire. There has been proposed a snowfall device for a power transmission line that scrapes off snow.

3, 4, and 5 show a snowfall device for the power transmission line. The snowfall device for a power transmission line shown in FIG. 3 rotates by obtaining a power source from the spiral rod 3 for snow removal arranged on the outer periphery of the electric wire 1, the current transformer 2 attached to the electric wire 1, and the current transformer 2. From the dog 17, which is connected to the motor 5, the shaft 15 to which the snow removal spiral rod 3 is fixed, the screw shaft 4 that rotates by the rotation of the motor 5, and the screw bearing 18, and moves forward or backward by the rotation of the screw shaft 4. When the screw shaft 4 is rotated by the rotation of the motor 5, the screw bearing 18 moves forward or backward, and the shaft 15 in the connected state moves forward or backward to move the snow removing spiral rod 3
Is designed to reciprocate.

In the snowfall device for a power transmission line shown in FIG. 4, the rotational force of the motor 5 is converted into a linear motion by the rack and pinion mechanism 7, and a shaft 19 connected to the rack and pinion mechanism 7 is reciprocated to remove snow. It is designed to move the spiral rod 3 forward and backward. Reference numeral 6 is a protective spiral rod wound so as to be in close contact with the outer periphery of the electric wire 1, and protects the outer surface of the electric wire 1 from the reciprocating snow removing spiral rod 3.

[0006] In the snowfall device for a power transmission line shown in FIG. 5, the sprocket 9 and the chain 8 are rotated by the rotation of the motor 5, and the snow removal spiral rod 3 is fixed to the chain 8 to remove the snow removal spiral rod. It is designed to move 3 forwards and backwards.

[0007]

However, according to the conventional snow drop devices for power transmission lines, in order to reciprocate the spiral rod for snow removal, the rotation of the motor in one direction is converted into motions in two different directions. Therefore, the structure becomes complicated, the size of the entire apparatus increases, and the cost increases. Also, if there are obstacles on the wires such as spacers or dampers, the movement of the spiral rod for snow removal is hindered, so depending on the number of spiral rods for snow removal arranged in the span to avoid obstacles. Drive must be installed. Furthermore, it is necessary to prepare a driving device corresponding to the number of the spiral snow-removing spiral rods wound around the multiple power transmission lines.

[0008] Therefore, an object of the present invention is to provide a snowfall device for a power transmission line, which can be downsized and the cost can be reduced.

Another object of the present invention is to provide an electric wire having an obstacle,
It is an object of the present invention to provide a snowfall device for a power transmission line, which allows a plurality of spiral rods for snow removal wound around multiple power transmission lines to be moved by a common drive device.

[0010]

SUMMARY OF THE INVENTION In view of the above problems, the present invention aims at downsizing and cost reduction of an apparatus, and a plurality of snow removal wound around an electric wire with an obstacle or a multi-line transmission line. To enable the common spiral rod to be moved by a common drive device, one end of the snow removal spiral rod is connected to a tension mechanism via a connecting wire, and the other end is fixed to an electric wire via a spring to remove snow. The pulling mechanism pulls the snow removal spiral rod a predetermined distance in advance, and the pulling force of the tension mechanism is released during snow removal to linearly move the snow removal spiral rod by the restoring force of the spring. A device is provided.

The tensioning mechanism receives a power supply from a power source such as a current transformer and rotates the motor in a predetermined direction, and transmits the rotation drive of the motor to, for example, a connecting wire for pulling the snow removal spiral rod. It consists of a one-way clutch.When the one-way clutch disconnects the snow removal spiral rod based on a detection signal from a snowfall detection sensor or the like during snow removal or by a manual operation by an operator, the restoring force of the spring pulls the snow removal spiral rod. And make a linear motion.

A plurality of the snow removing spiral rods may be arranged so as to avoid obstacles (spacers or dampers) of the electric wires and may be connected by a connecting wire. In this case, the plurality of connected snow removing spiral rods may be provided. One end is connected to the tensioning mechanism, and the other end is fixed to the electric wire via a spring. As described above, in the configuration in which the other end of the snow removal spiral rod is fixed to the electric wire with the spring, the spring extends when the snow removal spiral rod is pulled, but the spring is provided on the tension mechanism side to compress the spring when pulling. It may be configured as follows.

[0013]

In the snowfall device for a power transmission line according to the present invention based on the above structure, since the spiral rod for snow removal is moved only in one direction, the drive mechanism can be simplified, the drive device can be downsized, and the cost can be reduced. Can be down.
Also, by connecting a plurality of snow removal spiral rods with connecting wires, all the snow removal spiral rods can be moved by one drive device while avoiding obstacles, which makes the drive device easier to maintain. It can be installed nearby. Furthermore, by connecting a plurality of snow removal spiral rods wound around a multi-transmission line with a drive device via connecting wires according to the number of lines,
A single drive can move multiple snow removal spiral rods simultaneously.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A snowfall device for a power transmission line according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of the present invention, in which a protective spiral rod 6 is wound around the outer periphery of an electric wire 1 so as to be in close contact with the electric wire 1, and there is a gap above the spiral rod 3 for snow removal. Are wound in a cross shape. One end of the snow removing spiral rod 3 has a pulling mechanism 1 through a connecting wire 12.
4 and the other end is fixed to a supporting portion 10 provided on the electric wire 10 via a spring 11.

The pulling mechanism 14 includes a motor 5 as a drive source.
And a current transformer 2 that serves as a power source of the motor 5, and a one-way clutch 13 that transmits the driving force generated from the motor 5 to the connecting line 12. The one-way clutch 13 is separated from the motor 5 during snow removal. There is. This disengagement operation of the one-way clutch 13 may be performed by the operation of the control device based on the detection signal from the snowfall detection sensor or the like, or may be performed manually by the operator.

The snow removing spiral rod 3 has a connecting line 12.
The pulling mechanism 14 receives a pulling force from the pulling mechanism 14, and the other end is fixed to the supporting portion 10 via the spring 11. Therefore, when the snow removing spiral rod 3 receives the pulling force, Stretching mechanism 14 while extending
It is designed to slide in the direction.

The operation will be described below. First, the pulling mechanism 14 is operated before snow removal to put the snow removal spiral rod 3 in a standby state. That is, by driving the motor 5 with the one-way clutch 13 engaged, the connecting line 1
2 is pulled by a predetermined length to move the snow removing spiral rod 3 to a predetermined position while resisting the restoring force of the spring 11. When the snow removing spiral rod 3 moves to a predetermined position, the motor 5 stops and the snow removing spiral rod 3 is held at the moving position. Then, when the electric wire 1 is snowed, the one-way clutch 13 is disengaged by an automatic operation of a control device (not shown) based on a detection signal from a snowfall detection sensor or the like or a manual operation by an operator. When the one-way clutch 13 is disengaged, the restoring force of the spring 11 causes the snow removing spiral rod 3 to move from the moving position to the original position, and this movement scrapes off the snow of the electric wire 1.

As described above, since the pulling mechanism may be a mechanism for moving the snow removing spiral rod in only one direction, it is possible to simplify the structure, downsize the device, and reduce the cost. For obstacles such as spacers and dampers that exist in the span, place multiple snow removal spiral rods in the span to avoid obstacles, and connect each snow removal spiral rod with the connecting line described above. If connected,
All the snow removing spiral rods can be moved by one tensioning mechanism, and the tensioning mechanism can be installed near the clamp where maintenance is easy.

FIG. 2 shows a second embodiment of the present invention, in which a plurality of (two in this embodiment) power transmission lines are respectively wound with snow removing spiral rods 3, and each snow removing spiral rod 3 is provided. Is connected to the tensioning mechanism 14 via two connecting wires 12. Therefore, when the tension mechanism 14 is driven,
Two snow removing spiral rods 3 are designed to move simultaneously.

[0021]

As described above, according to the snowfall device for a power transmission line of the present invention, one end of the spiral rod for snow removal is connected to the pulling mechanism via the connecting wire, and the other end is fixed to the electric wire via the spring. However, the snow removal spiral rod is pulled by a predetermined distance by a tensioning mechanism before snow removal, and the pulling force of the tensioning mechanism is released during snow removal to linearly move the snow removal spiral rod by the restoring force of the spring. The pulling mechanism can be simplified, and thereby the device (driving device) can be downsized and the cost can be reduced. Also, by connecting a plurality of spiral rods for snow removal, which are arranged so as to avoid obstacles of electric wires, by a connecting wire, it is possible to make a linear motion with a single pulling mechanism connected to one end thereof, and The mechanism can be installed near the clamp where maintenance is easy. Furthermore, a plurality of snow removal spiral rods wound around multiple transmission lines are connected to a tensioning mechanism through connecting wires according to the number of threads, so that a single tensioning mechanism can simultaneously operate a plurality of snow removal spiral rods. Can be moved.

[Brief description of drawings]

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

FIG. 2 is an explanatory diagram showing a second embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a conventional snowfall device for a power transmission line.

FIG. 4 is an explanatory diagram showing a conventional snowfall device for a power transmission line.

FIG. 5 is an explanatory diagram showing a conventional snowfall device for a power transmission line.

[Explanation of symbols]

1 wire 2
Current transformer 3 Spiral rod for snow removal 4
Screw shaft 5 Motor 6
Protective spiral rod 7 Rack and pinion 8
Chain 9 Sprocket 10
Support part 11 Spring 12
Connecting line 13 One-way clutch 14
Drive

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuji Karashi 5-1-1 Hidakacho, Hitachi City, Ibaraki Hitachi Power Systems Laboratory, Hitachi Cable, Ltd.

Claims (2)

[Claims] 1. A snowfall device for a power transmission line comprising a snow removal spiral rod wound around an outer circumference of an electric wire and a drive device for linearly moving the snow removal spiral rod in a length direction of the electric wire. A pulling mechanism connected to one end of the snow removing spiral rod through a connecting wire and a spring that fixes the other end to the electric wire, and the pulling mechanism allows the pulling mechanism to move the snow removing spiral rod a predetermined distance before the snow removing. A snowfall device for a power transmission line, which is configured to linearly move the snow removal spiral rod by a restoring force of the spring by pulling the snow and releasing the tensile force of the tension mechanism during snow removal. 2. The snow removing spiral rod according to claim 1, wherein a plurality of the snow removing spiral rods are arranged according to the number of the electric wires or so as to avoid obstacles of the electric wires, and are connected by a connecting wire. A snowfall device for electric wires.