JP2565604B2 - U-turn wire extension method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of extending a power transmission line, and particularly, a temporary section on the side of the line exit is below the extension section.
In addition, the present invention relates to a U-turn wire-drawing method in which an electric wire drawn out from a wire-drawing place is U-turned at one end of a wire-drawing section to be installed when the wire is installed inward.

[0002]

2. Description of the Related Art Generally, when extending a power transmission line, it is necessary to use FIG.
As shown in FIG. 3, a winch field side temporary section B including the winch field 1 is provided at one end of the extended wire section A, and a wire dispatch field side temporary section C including the wire exit field 2 is provided at the other end of the extended wire section A. .

The temporary section C on the line exit side and the extended section A
Also, the messenger wire a is passed over in advance through each guide wheel 3 in the winch field side temporary section B, and the electric wire b is connected to the rear end of the messenger wire a via the running board 4. When the messenger wire a is wound in the winch field 1, the electric wire b is drawn out from the wire drawing field 2.

A counterweight 5 for preventing untwisting is suspended from the running board 4 described above. Each guide wheel 3 is composed of a three-wheel wheel.

On the back surface of the running board 4, that is, the surface facing the guide wheel 3, as shown in FIG. Further, the counter weight 5 is formed by connecting several weights by a link so as to be bendable, and each weight has a protruding portion 7 in the longitudinal direction that fits into a central metal wheel.

[0006]

When carrying out the wire-drawing method as described above, there are restrictions on the installation location of the line-out site 2 due to the topography, and the line-out site side temporary section C is always shown in FIG. As shown in the drawing, it cannot always be installed outside the wire extension section A, and as shown by the alternate long and short dash line in FIG. There is a case that it is unavoidable. In this case, it is necessary to make a U-turn in the wire-drawing direction between the wire-drawing-site-side temporary section C ′ and the wire-drawing section A.

However, if a U-turn is made in the extending direction, U
Since the running board 4 and the counterweight 5 are also turned upside down at the turn part, when the running board 4 and the counterweight 5 are oriented in the conventional direction in the line section A, the running board 4 and the counterweight 5 are run in the temporary section C'on the line exit side. Since the board 4 and the counterweight 5 are turned upside down, it becomes difficult to pass the guide rail car of the temporary section C ′ on the line exit side as they are.

On the other hand, in the conventional method of making a U-turn in the wire extension, some columns are erected along the outside of the radius of gyration so that a required radius of gyration can be obtained, and an electric wire is attached to a gold wheel attached to each column. There was a way to hang it and make a U-turn.

However, this method requires the work of erecting the column, and also causes a problem that the twist of the electric wire returns (the electric wire laughs) while passing through the rail wheel of the supporting column.

Therefore, an object of the present invention is to improve a device used for wire drawing and to smoothly perform U-turn wire drawing by using the device.

[0011]

In order to solve the above problems, the present invention is directed to a winch field side temporary section including a winch field at one end of a wire drawing section and a line exit field side including a wire drawing field at the other end. Temporary sections are provided respectively, and one messenger wire is laid over each of these sections, the rear end of the messenger wire is connected to a running board, and two electric wires are connected to both sides of the running board, and the running A counterweight with a protruding part formed on one side is rotatably attached to a board by a horizontal rotation shaft and is hung, and the above messenger wire is wound up at the winch field to draw out the electric wire from the wire outfield. In the wire-drawing method of the electric wire to be extended, a U-turn wagon is installed between the wire-drawing section and the wire-drawing-site-side temporary section. An installation section is provided below the U-turn car and close to the inside of the wire-drawing section, and a wire-drawing guide wheel is installed in the temporary section on the wire-drawing site side at required intervals. The guide rail cars are installed in the side temporary section at the required intervals, and the guide rail cars and the guide rail cars are provided by a three-wheel rail car consisting of a central rail car and double-sided rail cars installed on both sides of the central rail car. The groove of the central rail wheel of the wire guide vane is formed to have a width such that the surface of the counterweight opposite to the protruding portion side fits, and the groove of the central rail wheel of the wire guide rail is set to the counter. The protruding portion of the weight is formed so as to fit therein, and three auxiliary skids that fit into the groove of the central rail wheel and the grooves of both side rail wheels of the above guide rails are detachably attached to the surface of the running board, and the running board is run. On the back side of the board, A pair of main skids that fit into each of the above-mentioned guide rail cars with the surface side of the running board facing downward and the projecting portion of the counterweight facing the opposite side of the traveling direction in the temporary location on the side of the guide line. Of the counterweight by rotating the running board and the counterweight relative to each other around the rotation axis while reversing the front and back of the running board by passing the U-turn gold wheel. The projecting portion is directed in the traveling direction, the front surface side of the running board is directed upward, and the projecting portion of the counterweight is directed in the traveling direction so as to pass through each wire-drawing guide wheel to perform wire-drawing. .

[0012]

In the temporary section on the side of the line exit, the surface of the running board faces downward, that is, the surface on the side of the auxiliary skid faces downward, and the auxiliary skid passes through the groove of the line guide wheel. Further, the protruding portion of the counterweight hangs down toward the side opposite to the traveling direction, and the surface on the side opposite to the protruding portion of each wire guide rail passes while being guided by the central rail wheel. The running board is turned upside down by passing through a U-turn gold wheel, and in the extended wire section and the winch field side temporary section, the surface passes upward, that is, the main skid side passes downward. At this time, the protruding portion side of the counterweight hangs down in the traveling direction, and the protruding portion passes through the portion of each extended guide rail wheel while being guided by the central rail wheel.

[0013]

EXAMPLE The terrain for carrying out the U-turn wire-drawing method of the present invention is, as shown in FIG. 1, a winch field-side temporary section B provided at one end of the wire-drawing section A, which is the same as the conventional one.
Unlike the prior art, the line-exit-side temporary section C is provided below the extended line section A and inside thereof.

Since the extension line section A and the line-exit-side temporary section C have different extension directions, a U-turn gold wheel 8 is installed between both sections. In the wire-drawing area 2 provided at the end of the temporary area C on the wire-emitting area side, the electric wire drum 9 and the wire drawing wheel 10 are installed, and the wire drawing wheel 10 and the U-turn gold wheel 8 are installed as in the conventional case.
A required number of guide wire wagons 30 made up of three-wheeled gold wheels are installed at a predetermined interval between the two. Further, in the wire-drawing section A and the winch field side temporary section B, wire-drawing guide wheel 37, which is a tricycle wheel, is installed at a required interval.

The rear end of one messenger wire a and two
Running board 15 that connects the tip of the electric wire b of the book
As shown in FIGS. 2 to 4, a messenger wire mounting bracket 17 is provided at the center of the back surface of a yoke 16 having a constant width, and a pair of wire mounting brackets 18 is provided on both sides of the messenger wire mounting bracket 17. Each of these brackets 17, 18
Then, the rear end of the messenger wire a and the front end of the electric wire b are connected via the connection fittings 19 and 20, respectively. A bullet head-shaped main skid 21 is fixed to the front end of the wire mounting bracket 18. The surface on which the main skid 21 is fixed is the back surface of the running board 15. Note that the electric wire b
A wire extension clamp 36 is attached to the tip of the.

A counterweight mounting bracket 22 is provided at the center of the rear end of the yoke 16 so as to project rearward, and the counterweight 23 is mounted on the bracket 22 via a horizontal rotary shaft 23 'which is orthogonal to the traveling direction. Can be oscillated in the front-back direction. The counter weight 23 is formed by connecting a plurality of weights 24 by a link 25 so as to be bendable. Each weight 24 is formed by bending a steel plate and forming a protrusion 26 in the longitudinal direction at the center. When the back surface of the running board 15 faces upward as shown in FIG. 2, the counterweight 23 has its protrusion. 26 hangs backward (opposite the direction of travel).

Further, as shown in FIG. 4, on the surface of the running board 15 opposite to the above, that is, on the front surface side, as shown in FIG. Individual auxiliary skids 27 are detachably attached by bolts 28.

A line guide wheel 30 is installed in the temporary section C on the line start site side at a required interval. As shown in FIG. 5, the wire drawing guide wheel 30 has a rectangular frame 31.
It is a three-wheeled gold wheel having a central gold wheel 32 at the center and two metal wheels 33 on both sides thereof. The groove of the center wheel & pinion 32 is formed in such a width that the surface of the counterweight 23 opposite to the protruding portion 26 is fitted, and a passage groove 34 for the messenger wire a is provided at the center of the groove.

Further, the central gold wheel 32 and the gold wheels 33 on both sides are provided.
The three auxiliary skids 27 provided on the surface of the running board 15 are respectively fitted into the respective grooves.

Further, wire guide wheels 37 are installed in the above-mentioned wire extension section A and the winch field temporary section B at a required interval. This wire drawing guide wheel 37, as shown in FIG.
It is a three-wheeled gold wheel having a central frame wheel 13 at the center of a quadrangular frame 12 and two-sided gold wheels 14 on both sides thereof.

The messenger wire a, its mounting bracket 17, and the protruding portion 26 of the counterweight 23 are successively fitted into and passed through the groove of the central wheel 13 described above.

The wire mounting bracket 18 and the wire b connected to the wire mounting bracket 18 fit into the groove of the two-sided gold wheel 14 and pass therethrough.

The temporary section C and the extended section B on the line exit side
As shown in FIG. 7, the U-turn gold wheel 8 installed between and is vertically installed on the fixed frame 35, and the diameter thereof is the diameter of each of the guide gold wheels 30, 37 (for example, 6
The messenger wire a and the electric wire b can be made a U-turn without any difficulty by being formed with a diameter (for example, 1500 mm) considerably larger than 00 mm).

The devices necessary for wire drawing are as described above. Next, the method of wire drawing using these devices will be described.

First, as shown in FIG. 1, the central guide wheels 32 and 13 of the wire guide wire wheel 30 and the wire guide wire wheel 37 which are installed in advance.
The messenger wire a is attached to the wire, and the tip of the messenger wire a is wound in the winch field 1 to draw the wire b from the wire exit field 2. The running board 15 passes through each of the guide rail cars 30 in a state where the rear surface faces upward and the front surface faces downward in the temporary section C on the side of the line-out place (see FIGS. 2 and 3). At this time, the messenger wire a passes through the central gold wheel 32, and the three auxiliary skids 27, as shown in FIG.
Will be guided to. Further, the electric wire b passes through the gold wheels 33 on both sides.

The counterweight 23 has a protruding portion 26.
2 hangs backward (see FIGS. 2 and 3), and in each guide wheel 30, the rotary shaft 23 'rotates 90 degrees rearward, and the surface opposite to the protruding portion 26 faces downward and the central metal It fits in the guide groove of the car 32 and passes through each guide wheel 30.

In this way, the running board 15 is U
When reaching the turn gold wheel 8 and passing through the U-turn gold wheel 8, the running board 15 is turned upside down, and the front side faces upward. At this time, the counterweight 23 and the running board 15 relatively rotate around the rotary shaft 23 ', and the protrusion 26 of the counterweight 23 passes through the groove of the U-turn gold wheel 8 when the passage is completed. In the hanging state, the protruding portion 26 side faces the traveling direction (see the alternate long and short dash line in FIG. 7).

Immediately after the running board 15 passes through the U-turn gold wheel 8, the wire extension is temporarily stopped, the bolt 28 is removed, and the auxiliary skid 27 is removed. This is for avoiding the trouble of the wire drawing due to the use of the auxiliary skid 27 which is useless in the wire drawing section A.

When the extension of the running board 15 is resumed after the auxiliary skid 27 is removed, the surface of the running board 15 faces upward and enters the extension line section A (see the alternate long and short dash line in FIG. 1). In the line-drawing section A and the engine-field-side temporary section B, the running board 15 has the back-line side of each line-drawing guide wheel 3 as in the conventional case.
7, messenger wire a, bracket 17
And the protruding portion 26 of the counterweight 23 is the central gold wheel 1.
3 and the main skid 27 and the electric wire b are on both sides of the gold wheel 1
It fits in the groove of No. 4 and passes through each wire guide wheel 37.

[0030]

As described above, according to the present invention, when the U-turn is extended, the temporary section on the side of the starting point is located at the position below and inside the extension section due to the restriction of the topography of the starting point. Even if the running board is provided, the running board can be smoothly passed through the wire guide car and the wire drawing car in the section before and after the U-turn car, and thus the U-turn drawing work can be performed quickly and smoothly. You can

[Brief description of drawings]

[Figure 1] Overall view of the wire drawing

FIG. 2 is a perspective view of the back side of the running board.

FIG. 3 is a side view of FIG.

FIG. 4 is a bottom view of FIG.

[Fig. 5] Front view of the line guide car

FIG. 6 is a front view of a wire drawing guide car.

FIG. 7 is a side view of the portion of the U-turn money car.

FIG. 8 is an overall view of a wire drawing according to a conventional technique.

FIG. 9 is a plan view of a running board according to the related art.

[Explanation of symbols]

 a messenger wire b electric wire 1 engine field 2 line outfield 3 guide car 4 running board 5 counterweight 6 skid 7 protruding part 8 U turn gold car 9 electric wire drum 10 wire drawing car 12 frame 13 central gold car 14 both-side gold car 15 Running board 16 Yoke 17 Messenger wire mounting bracket 18 Electric wire mounting bracket 19, 20 Connecting bracket 21 Main skid 22 Counterweight mounting bracket 23 Counterweight 23 'Rotating shaft 24 Weight 25 Link 26 Projection 27 Auxiliary skid 28 Bolt 30 Wire Outlet guide wheel 31 Frame 32 Central wheel 33 Wheels on both sides 34 Passage groove 35 Fixed frame 36 Wire clamp 37 Wire guide wheel

Claims (1)

(57) [Claims] 1. A winch field side temporary section including a winch field is provided at one end of the extended wire section, and a line exit field side temporary section including a line exit field is provided at the other end, and one section is provided for each of these sections. Strand the messenger wire of the book , connect the rear end of the messenger wire to the running board , and
Connecting two wires on both sides of the mounting board, and attaching a counterweight with a protrusion on one side to the running board so that it can be rotatably attached by a horizontal rotating shaft and hang it.
Lower, by winding the messenger wire above winch field, the electric wire in the extending line method of electric wires extending line drawn from said line out field, between said extension line section and the line-out field side temporary section to set up a U-turn gold vehicles, provided with the line out field side temporary period displaced in the extending line section inward at below the U-turn gold car, the line
Install guide rail cars in the temporary section on the dispatch side at required intervals
In addition, it is proposed to extend the above-mentioned extension section and the temporary section on the winch field side.
Install inner rail cars at required intervals, and use the above guide rail cars
There are guide rail cars on both sides of the central rail car.
It consists of a three-wheeled gold wheel consisting of two sided gold wheels.
Guide the counterweight through the groove of the central
Formed to a width that the surface on the side opposite to the projecting side fits, and
The protrusion of the counterweight fits in the groove of the center metal wheel of the car.
It is formed so that it fits on the surface of the running board.
Fit into the groove of the central and double-sided wagons
Three auxiliary skids are detachably attached and the running
On the back side of the board, fit in the groove on both sides of the above-mentioned extended wire guide wheel
A pair of main skids are provided, and the running board is installed in the temporary section on the line exit side.
Face down, and the above counterweight
Guide wire for each of the above wires with the exit facing away from the direction of travel.
Pass the car and pass the U-turn gold car
The front and back of the running board can be turned upside down and
Run the running board and the counter weight above.
The counter by rotating relative to the axis of rotation
-Aim the protruding portion of the weight in the direction of travel and run the above
With the front side of the board facing upward, and the above counterway
With the protruding part of the
U-turn extending line method which comprises carrying out the extension line Me and.