JPH0681379B2 - Insulation wire extension method - Google Patents

Description

Description: [Industrial field of use] The present invention relates to a wire extension method for replacing an existing power line, a distribution line, an overhead ground line or the like with a new line.

[Prior Art] Conventionally, when performing a work to rewire an electric wire, if there is an obstacle or a work under the electric wire and a scaffold for protection cannot be constructed, or if a wire is stretched with a low tension, a hanging wire is used. Although the construction method has been adopted, sufficient safety measures were required when conducting live work. Such a wire-drawing method is, for example, as shown in the thirteenth drawing, in which a large number of metal wheels b are hung at a distance of 20 to 30 m on a main rope wire or an existing erection wire a which has been previously extended, and a spacing wire. The new erection line e is connected to the pulling wire d passed through each of the gold wheels b, and the new erection line e is extended on the gold wheel by pulling it by connecting f to the wire. The tension is applied to the erection wire e of No. 1 to temporarily raise it, then the existing erection wire a is loosened and a rope is attached to this, and then the rope is attached to the spacing wire c and pulled to pull each gold wheel b. Remove the existing installation line a in this way
Had been replaced with a new construction line 5.

In addition, when constructing a new cable line, a plurality of telescopic columns having wheels at the lower end are arranged between a transport carriage on which a cable drum is mounted and a telephone pole, and the apexes of the columns are extended to form their apexes. Of the cables pulled out from the cable drum by installing the guide troughs on the apexes of each of these diagonal columns and installing them so that the guide troughs rise from the cable drum toward the upper part of the utility pole. Through the inclined guide gutter to the upper part of the utility pole, suspend the exposed cable from this guide gutter as it is on the support line stretched between the utility poles, and pull the tip of this cable with a wire rope to place it below the support line. There is known a cable laying method and an apparatus therefor, which is disclosed in Japanese Patent Laid-Open No. 49-70192.

Also, to prevent an electric shock when working near a high-voltage electric wire, as a device to cover the high-voltage electric wire with an insulation protection tube, a wire attachment part is provided on the top of the operation handle part, and it is provided on this wire attachment part. Insulation protection tube is attached to the electric wire by attaching the wire protection tube mounter, which has a roller part with multiple rollers to the guide piece, and opens the opening of the insulation protection tube with this roller part. A wire protective tube mounter of Japanese Utility Model Publication No. Sho 49-35758 is known.

Also, in order to newly install a new electric wire, a filament such as an overhead ground wire, etc. across the special high voltage line, the self-propelled machine is run on the overhead ground line of the special high voltage line and the special high voltage line is crossed. Therefore, a pilot rope is stretched between new steel towers on both sides orthogonal to the special high-voltage line, and a large number of short cage cage protection frames in which insulating rods are connected in a cage by a converging ring A supporting wire connected to a large number of cage-shaped protective frames is connected between steel towers by connecting it to a supporting wire and replacing the pilot rope with this supporting line. This pilot rope is exchanged with a messenger wire through a rope, an electric wire to be newly installed is connected to the end of this messenger wire via a wire drawing tool, and this new electric wire is connected with the wire drawing tool to the above-mentioned many cage-shaped protective frames. body JP to extend lines through 61-244209
The No. Scaffolding wire extension method and the protective frame used therefor have been proposed.

[Problems to be Solved by the Invention] The conventional wire drawing method as shown in FIG.
Are placed with a considerable space between them, so that the pulling wire d droops greatly when the gold car is deployed or recovered, and when constructing live lines, one side of the power transmission line is affected by wind, which is a safety measure. There was a problem.

Further, the cable laying method and apparatus disclosed in the above patent application is a newly installed cable line by suspending an exposed cable from a guide gutter that rises upright and suspending it from a supporting line stretched between utility poles and extending it. Since this is a method of erection, there is a problem that it cannot be applied to a method of replacing an existing erection line with a new erection line in a live line.

Further, the electric wire protective tube mounting device of the utility model application publication is to cover the high voltage electric wire with an insulating protective tube in order to prevent an electric shock accident when working close to the high voltage electric wire. There is a problem that it cannot be used to replace old and new electric wires.

Further, the scaffold-less wire-drawing method and the protection frame body proposed by the above-mentioned patent application publication are methods for newly installing a new electric wire that crosses above the special high-voltage line and is orthogonal to the special high-voltage line. A new steel tower is built on both sides of the track, a self-propelled machine is run on the overhead ground line of the special high voltage line, and a pilot rope is stretched perpendicular to this special high voltage line. Since this is a construction method in which a new electric line is laid perpendicularly to the above, this wire extension method cannot be applied to a live wire construction method in which an existing erection wire is replaced with a new erection wire in a live line.

The present invention solves the above-mentioned problems, and in a transmission line in a live state, a construction method of replacing an existing erection line with a new erection line is used to prevent sagging of the erection line, and to maintain insulation and safely. It is an object of the present invention to provide an insulating wire drawing method that can be installed.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the insulating wire-drawing method of the present invention uses the existing erection wire A (= the diametrically installed between the support columns T). Insulation along the existing hose line A while inserting the existing hose line A into the insulation hose H along with the insulation hose H along the electric wire used for the transmission line First to pull the hose H through the span
And the second step of holding the end of the insulating hose H to the support column T to stretch the insulating hose H in the span, and the existing erection line A supported at the support point of the support column T. And a third step of removing the supporting portion of the existing supporting wire from the supporting point in a continuous state, and a new erection wire B at the rear end of the existing erection wire A A fourth step of connecting the ends of wires, overhead wires, etc.) and pulling out the existing wire A through the insulating hose H to extend the new wire B through the insulating hose H; ,
By the fifth step of removing the insulating hose H stretched over the above-mentioned span from the support column T and collecting it, and the sixth step of tightly tensioning the above-mentioned new installation line B and stretching over the span. In this method, the existing construction line A is replaced with the new construction line B.

[Operation] By the first step and the second step, while putting the existing spanning wire A in the span into the insulating hose H, the insulating hose H is pulled through along the existing spanning wire A and stretched over the span. Form an insulated wire channel.

By the 3rd process, the existing overhead wire A for the next process (4th process)
As a pre-preparation to enable the pulling out of the existing
Is removed from the support point of the support column T in a continuous state.

In the fourth step, the existing erection line A is used to connect the new erection line B to the rear end of the existing erection line A, and the existing erection line A is pulled out through the insulating hose H, and the new erection line B is spanned. The wire is extended and the existing erection line A and the new erection line B are replaced in the insulating hose H.

In the fifth step, the insulating hose H stretched in the span is pulled out from the support column T and collected, and in the sixth step, the newly installed erection line B is tightly stretched in the span.

By each of the above steps, in the transmission line in a live line state, insulation is secured in the insulating hose H and the existing overhead line A
The new construction line B can be replaced, and the old and new construction lines can be prevented from hanging down, and hot line work can be performed safely.

Embodiments Embodiments of the present invention will be described below with reference to the drawings. 1 to 8 show the sequence of the insulating wire drawing method of the present invention, and FIGS. 9 to 12 show the insulating hose used in the wire drawing method.

The insulation hose H used in the insulation wire-drawing method of the present invention is the ninth
As shown in the perspective view of FIG. 10 and the cross-sectional view of FIG. 10, a cut line portion 2 is formed by cutting a hose 1 made of an insulating material such as flexible rubber or plastic in the longitudinal direction to form a cut. , A stop ring 3 is wound around the outer circumference of the hose so that the incision line part 2 does not open when it is attached to an overhead wire, and a large number of the hoses 1 are connected by joints 4 so that the hose 1 can be installed along the overhead wire. Construct a continuous insulating hose H. In this joint 4, a joint 5 having a screw on the outer circumference of the tip is fitted to the end of one hose, and a joint 6 having a screw on the outer circumference of the tip is also fitted to the end of the other hose. , 6 are screwed together with a tubular nut 7 to connect both hoses. The tubular nut 7 is provided with a stopper 8 for preventing the tubular nut 7 from slipping off in order to be fitted and inserted in the joint 6.

Note that the joint 4 may be configured as shown in FIG. 11 instead of using the one configured as described above. The eleventh illustrated joint 4 is such that the outer circumference of one hose end is sandwiched by two conical wedges 10 and a cylindrical joint 11 is fitted on the outer circumference thereof, and the other hose end is similarly divided into two conical cones. The wedge 12 and the cylindrical joint 13 are fitted to each other, and the two cylindrical joints 11 and 13 are fitted to each other and coupled to each other, whereby a large number of hoses 1 are connected in a long length. Reference numeral 14 is a connecting bolt of an opening / closing end edge 15 in which each of the cylindrical joints 11 and 13 is formed as an opening / closing type, and 16 is a hole for connecting the ends of the insulating hose when pulling the end with a rope.

The insulating hose H, which is configured by connecting a large number of hoses 1 in a long manner by the joint 4, is stretched in a span so as to surround the outer circumference of the existing erection line A, and as shown in FIG. The self-propelled machine 20 is placed on the erection line A, and the tip of the insulating hose H is pulled to this and tied with a rope L1, while the self-propelled machine 20 is run on the existing erection line A, while the insulating hose H is sequentially fed out, The existing erection wire A is sequentially inserted into the hose from the incision line portion 2 of the hose 1, and the retaining ring 3 is wound around the outer periphery of the hose at appropriate intervals, and the existing erection wire A is put inside and stretched over a span.

The insulation wire-drawing method of the present invention is a method of constructing a power transmission line in a live wire state using the above-mentioned insulation hose H, and includes first to sixth steps, and the first step includes an existing span. While inserting the erection wire into the insulation hose, pull the insulation hose along the existing erection wire in the span, and in the second step, hold the end of the insulation hose to the support pillar and stretch the insulation hose in the span. In the third step, the existing erection wire is removed from the support point of the support column, and in the fourth step, the existing erection wire is pulled out through the insulating hose, and at the same time, a new erection wire to be replaced is extended to the span. In the fifth step, the insulating hose stretched over the span is pulled out from the support column and collected, and in the sixth step, a new installation wire is tightened and stretched over the span.

In the present invention, the existing erection wire refers to an old erection wire such as an electric wire that has already been erected in a span and used for a transmission line, an overhead ground wire, etc., and a new erection wire refers to the above-mentioned existing erection wire. A new erection line such as an electric wire or an overhead ground wire that is newly replaced by replacing the erection line.

First step: In FIG. 1 showing the first step, T is an electric pole supporting an existing erection, a supporting pole such as a steel tower, and A is an existing erection line stretched between spans thereof. is there. First, the insulating hose H fed from the drum 30 is pulled by the self-propelled machine 20 as shown in FIG. 12 and pulled through along the existing erection line A, and the existing erection line A is sequentially inserted into the hose to obtain a diameter. Insulate hose H between them. The first span in the right side of the drawing shows a state in which the insulating hose H is drawn through and stretched over the existing erection line A, and the left span is obtained by running the self-propelled machine 20 on the existing erection line A. The state which is pulling the insulating hose H is shown. FIG. 2 is a partial cross section showing a state in which the existing hose A is surrounded and the insulating hose H is stretched as described above.

Second step: Each insulating hose H stretched along the existing erection line A with each span as described above does not have its end joined at the support point of the support column T, or joint treatment. And hold it on the support pillar T.

FIG. 3 is a plan view showing a state in which the tip of the arm Ta that horizontally extends from the support column T supports the existing erection line A. This is the case where the ends of each insulating hose H are not joined together. This is the case where the treatment is shown, for example, when the existing erection line A is retained by the compression retaining clamp CL in the tension tower. In this way, when the existing erection line A is held by the clamp CL, the insulating hose H holds the joints 11 and 13 at its end as it is held by the holding rope L2 to the arm Ta as shown in FIG.

Further, as shown in FIG. 5, when the existing erection line is suspended and supported by the suspension tower, the ends of the respective insulating hoses H are jointed. FIG. 5 is a plan view showing a state in which the tip of the arm Ta supports an existing erection line, and as shown in the figure, the insulating hose H has joint joints 11 at the ends thereof.
It is connected by 13 and is held by the arm Ta by the holding rope L2. 5 view of the left side of the joint 13 ^- the said joint part joint when the position is shifted from the center of the arm Ta to the right of 13 ^- held back the arm Ta only the mounting in the middle of the insulating hose H cocked rope L2 It is in a state of being.

As described above, in the second step, the existing overhead line A
Is held by a tension steel tower as shown in FIG. 3 or is suspended and supported by a suspension tower as shown in FIG. Stretch it.

Third step: the existing erection line A is the arm Ta of the support pillar T.
Since it is fixed and supported in the third step, the supporting portion of the existing erection line A is made continuous and removed from the supporting point. It is supported by being held by a compression holding clamp CL, or is supported by being suspended by a suspension tower as shown in FIG.

As shown in FIG. 3, when the existing overhead wire A is held by the compression holding clamp CL in the tension tower, the existing overhead wire A clamped by the compression holding clamp CL is used.
Is cut from the roots on both sides of the clamp, and both ends of the existing erection line A on both sides of this clamp are connected by a connection line A1 (shown in dotted lines in FIG. 3) to make the existing erection line A continuous. The existing erection line A removed from the support point of the support pillar arm Ta is placed on the gold wheel W as shown in FIG. Figure 4 is the third
It is not a plan view as shown but a view seen in the vertical direction, and shows a state in which the gold wheel W is suspended from the arm Ta.

Further, when the existing erection line A is suspended and supported by the suspension tower as shown in the fifth illustration, the supporting portion of the existing erection line A is continuous, so that it is removed from the supporting point as it is and as shown in the sixth illustration. Place it on the gold car W. FIG. 6 shows a state in which the gold wheel W is suspended from the arm Ta as viewed in the vertical direction.

As described above, in the third step, the supporting portion of the existing erection line A supported by the supporting column T is made continuous and removed from the supporting point.

Fourth step: In the fourth step, the existing erection line A is connected to the new erection line B and the existing erection line is passed through the insulating hose H stretched along the existing erection line A having the above-mentioned spans. Pull out the wire A and install a new installation wire B inside the insulating hose H.
This is a step of drawing in and extending the wire. This is, as shown in FIG. 7, a wire drawing wheel 40 is installed on the sending side of the new installation wire B, and an existing installation wire A is wound on the take-up side. The engine 50 is installed, and the tip of the new construction line B is installed on the existing construction line A.
Connect to the rear end with a wire, wind the existing erection line A with the winding engine 50, and pass it through the insulating hose H.
Is pulled out, the existing erection line A is pulled and the new erection line B is drawn inside the insulating hose H and extended. FIG. 8 shows a state in which the tip of the newly installed erection line B is connected to the rear end of the existing erection line A as described above.

In addition, in the case where the newly installed overhead line B sent out from the extended line vehicle 40 intersects with the power line C as shown in FIG. 7, in order to prevent the contact, the support point of the first support pillar T1 and the extended line vehicle 40 are connected. An insulating hose H is also laid between them and a new erection line B is sent out through the inside.

By winding the existing overhead wire A with the take-up engine 50 as described above, the existing overhead wire A stretched over the span is provided.
The entire length of the wire is pulled out through the insulating hose, and instead, a new erection wire B is drawn through the insulating hose and extended. In this way, the newly installed erection line B drawn through the span holds the end thereof to the support column T.

Fifth step: Insulation in which the newly installed erection wire B is held by the support pillar T as described above, and then the newly installed erection wire B is passed through the inside and stretched over a span to hold the end portion by the support pillar T. Remove hose H and collect.

Sixth step: Next, the work of applying tension to the newly installed erection line B for each span and tightening it is sequentially performed for each support column T.

As described above, by the first to sixth steps, in the transmission line in the live line state, the old and new erection wires do not hang down, insulation is secured in the insulating hose H, and the existing erection wire A The work to replace the new installation line B is completed.

[Effect of the Invention] In the insulated wire drawing method of the present invention, as described above, the insulating hose can be installed in the existing hose while the existing hose having the span is put in the insulating hose by the first step to the sixth step. It is possible to form an insulated wire channel by stretching it along the span to form an insulated wire channel, pulling out the existing wire and pulling the new wire through the insulating hose to hang down both the old and new wire. It is possible to work together without any obstacles, and the new installation wire can be pulled out with the same degree of slack as the existing installation wire, so even if there are obstacles below, work can be done safely without being disturbed. Therefore, in a live transmission line, it is possible to replace the existing erection line with the new erection line by ensuring insulation in the insulation hose.

[Brief description of drawings]

FIG. 1 is a diagram showing a first step of the insulating wire drawing method of the present invention, and FIG. 2 is a sectional view showing an existing erected wire in an insulating hose, and FIG.
The figure shows the second step for the tension-resistant detent portion, FIG. 4 is the cross-sectional view for showing the third step for the tension-resistant detent portion, and FIG.
The figure which shows a process about a suspension stop part, FIG. 6 is sectional drawing which shows a 3rd process about a suspension stop part, FIG. 7 is a figure which shows a 4th process, FIG. 8 is an existing installation line in an insulating hose. Fig. 9 is a view showing a connection state between a new installation wire and Fig. 9, Fig. 9 is a perspective view of an insulating hose, Fig. 10 is a sectional view of one embodiment of a joint portion of the insulating hose, and Fig. 11 is a joint portion of the insulating hose. FIG. 12 is a cross-sectional view of another embodiment, FIG. 12 is a view showing a state in which the insulating hose of the first step is drawn along an existing erection line, and FIG. 13 is a view showing a conventional construction method. A: Existing construction line B: New construction line H: Insulation hose T: Support column

Claims (1)

[Claims] 1. An insulating hose is laid along an existing erection line having a span between support columns, and the existing erection line is inserted into the insulative hose and the insulating hose is pulled along the existing erection line. And a second step of pulling the insulating hose over the span by holding the end portion of the insulating hose on the support column and supporting the insulating hose at a support point of the support column. The third step of removing the supporting portion of the existing erection wire from the supporting point in a continuous state, and connecting the tip of the new erection wire to the rear end of the existing erection wire and passing it through the insulating hose. A fourth step of pulling out the existing erection wire to extend the new erection wire through the insulating hose, and a fifth step of removing and recovering the insulating hose stretched between the diametrical distances from the support column. And, tightly wire the newly installed erection wire and stretch it across the span. By the sixth step, the insulating extension line method characterized by Harikaeru the erection line of newly established existing erection line.