JPS63310307A - Execution of plural-extension-wire work - Google Patents

Abstract

PURPOSE:To extend a plurality of wires at a time and enable the extension of the wires of a plurality of frequencies to be performed with the preparation work of one frequency, by using main cables expanded previously between steel towers, as extension ropes, and by extending the wires. CONSTITUTION:When wires 44 are extended between steel towers 20, then main cables 40 are temporarily arranged at specified intervals first, and metal wheel bearing rollers 19 are engaged with the main cables 40 to support suspension metal wheels K. After that, ropes 41 are expanded as leading ropes by suspending the suspension metal wheels K from the main cables 40, and by using extension ropes 43, the wires 44 are extended. Then, the respective wires 44 are temporarily clamped and after they are extended, they are supported by suspension metal wheel bearing rollers 18. After that, when the tensile force of the main cables 40 engaged with the bearing rollers 19 and provided with the supported suspension metal wheels K first is loosened, then the main cables 40 are separated from the bearing rollers 19, and are dropped on the upper surfaces of extension wire rollers 16. Then, the dropped main cables 40 are used as extension wire ropes, and on the upper surfaces of the extension wire rollers 16, two wires in total, namely, one by one, are extended, and they are temporarily clamped. when the leading-out and temporary arrangement of four upper-layer wires are completed, then external frames 12 are removed from and expansion is performed on the middle-layer main cables 40.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a multi-strip wire extension method that allows multi-strip electric wires to be extended in one preparatory operation.

[Technical background of the invention and its problems] Conventionally, the metal wheels used in the low-tension wire extension method and the ground wire uninterruptible replacement method have a non-reversible suspension type as shown in Figures A and B. There is a gold car.

Hereinafter, the non-reversible metal wheel and the wire extending method using the same will be explained with reference to FIGS. 3A and 3B and FIGS. 4A to 4.

FIG. 3A shows a state in which the wire is being pulled out by a non-reversible hanging wheel, and FIG. 3B shows a state in which the wire is temporarily lifted.

In these figures, the non-reversible hanging wheel has four drum-shaped rollers 2 supported by a framework 1 at the vertices of a substantially quadrilateral shape.

First, as shown in FIG. 4A, before starting the wire extension, the upper phase 16φ wire 21 is temporarily raised to the steel towers 20 at both ends of the span with a specified slack. 16φ wire 21
The 12φ nylon rope 22 was placed in advance along the
are used as pull ropes as shown in FIG.
The hanging wheel 24 having the structure described in Figure A is deployed.

After completing the deployment of the hanging wheel in this way, the 16φ nylon rope 23 is pulled out to the 16φ wire 25 as shown in FIG. The connecting swivels are shown.

Next, as shown in the fourth diagram, the first wire 27 is extended using the drawn wire 23. Note that 28 in this figure indicates a retaining clamp that connects the wire 23 and the electric wire 27.

Furthermore, as shown in FIG. 4E, the electric wire 27 is temporarily raised.

Next, as shown in FIG. 4F, loosen the 16φ wire 21,
The hanging wheel 24 is supported by the temporarily raised electric wire 27, and the fourth
As shown in Figure G, a second electric wire 29 is drawn using the 16φ wire 21 as a pull wire.

Here, in order to recover the hanging wheel 24, as shown in FIG. 4H, the slackness of the second wire 29 is made equal to that of the first wire.

Furthermore, after temporarily raising the middle phase 16φ wire 30 to a specified slack, while recovering the upper phase hanging wheel 24, these are developed into the middle phase 16φ wire 30.

Thereafter, the two wires for the middle phase and lower phase are wired in the same manner as above.

In the above-mentioned conventional wire extending method, only one electric wire can be extended, and moreover, only two electric wires at maximum can be extended in one wire extension preparation operation.

In this case, in order to extend multi-conductor lines such as 4-conductor lines, 6-conductor lines, and 8-conductor lines, it is necessary to perform preparation work many times, and the number of steps and time required for the line extension work is limited. It was noticeably large.

[Object of the Invention] The present invention has been made based on the above circumstances, and provides a wire extension that is capable of extending multiple wires at once, and moreover, that allows the wire to be extended multiple times in one preparatory work. The purpose is to obtain construction methods.

[Summary of the Invention] The wire drawing method of the present invention comprises a wire drawing machine hanging wheel support roller of a number equal to the number of corresponding conductor strips located at the upper end of the frame, and two hanging wheels located on the outside of these rollers. It is equipped with a wire wheel support roller and the same number of wire drawing rollers located directly below the wire drawing machine hanging wheel support roller, and an opening/closing plate is provided at the lower end of the intermediate frame separating the hanging wheel support roller and the wire drawing roller. Using a hanging wheel provided with A plurality of Wi wires forming a phase are simultaneously extended onto the wire extension rollers by wire extension ropes arranged along each main rope, and after temporarily hoisting these wires, the main rope is relaxed. The present invention is characterized in that the main ropes are pushed open by the opening/closing plate and dropped onto the wire extension rollers, and these main ropes are used as wire extension ropes to carry out the next extension of the electric wire.

[Embodiments of the Invention] FIG. 1A is a front view of a hanging wheel used in the construction method of the present invention, and FIG. 1B is a side view thereof. This hanging wheel is configured for four-conductor wire extension, and the frame 10 has an upper end inserted into the first shaft 11 and consists of a parallel upper end, a lower end, and an oblique side connecting them. two external frames 12 arranged at both ends of the first shaft 11; and two internal frames 13 parallel to the upper and lower ends of the external frames 12 and whose upper ends are inserted near the center of the first shaft 11. and an intermediate frame 15 having an opening/closing plate 15a located between the inner and outer frames, whose upper end is inserted through the first shaft 11, and whose lower end is attached by a hinge 14. Between the lower ends of the inner and outer surface frames 12.13, a large diameter wire drawing roller 16.16 is connected to the second shaft 1.
A wire drawing machine hanger support roller 18 is rotatably supported by a first shaft 11 between the upper ends of these frames. Further, between the upper ends of the external frame 12 and the intermediate frame 15, a hanging wheel support roller 19 is rotatably supported by the first shaft 11. Note that the first shaft 11 is provided with a metal fitting 11a for connecting a rope connecting the metal wheels.

The wire rolling method of the present invention is carried out as follows using the four-conductor wire rolling wheel having the above configuration.

Figure 2 A, A2, A, ~H1, H2, Hl are schematic diagrams showing each process of the wire extension method, and those with the subscript 1 in these figures are electric wires, wires, ropes, etc. between towers, Those with the suffix 2 indicate the condition of the wires, etc. in the arm of the tower, and the ones with the suffix 3 indicate the condition of the wires, etc. on the hanging wheel shown in Figure 1AB. show. In addition, in the figure, O indicates an electric wire, * indicates a main rope, an opening indicates an extended rope, Δ indicates a rope, and × indicates a ground wire.

First, as shown in the circle in FIG. 2, two main ropes 40 for each of the upper, middle, and lower phases are temporarily fixed between the steel towers 20 with a predetermined slack at a predetermined interval. The metal wheel support roller 19 is engaged with the main rope 40 to support the hanging wheel K, and the hanging wheel K is deployed in the span. Main rope 40
42 in FIG. 1 indicates a ground line along which a rope 41 is placed in advance.

Figure 2 A2 shows their arrangement on the tower arm.

Next, as shown in FIG. 2 Bi, the lower surface of the support roller 19 is engaged with the two main ropes 40 and the hanging wheel, and the metal fitting 11 is connected between the hanging wheels.
Using the rope 41 as a pull rope, a plurality of hanging wheels K are suspended from the main rope 40 and deployed. At the same time as this unfolding, a wire extending rope 43 having the same structure as the main rope 40 is placed on the upper surface of the wire extending roller 16 of each unfolded metal wheel by the rope 41.
pull it through.

Next, as shown in FIG. 201, these extended ropes 43
Using , extend one total of two f1M44 wires on the upper surface of the roller 16 (f!! line drawing) 0 45 in Figure
indicates a connecting rope that connects the hanging wheel.

Here, as shown in Fig. 2 D, each electric wire 44 is temporarily tied and engaged with the wire-drawing machine hanging wheel support roller 18, and the hanging wheel K is connected to the wire-drawing machine hanging wheel support roller 18. Support it (temporarily raise the wire).

Next, as shown in FIG. 2 E1, the hanging wheel support roller 19
When the tension of the main ropes 40 that initially supported the sling wheel K is loosened, these main ropes 40 are attached to the sling wheel support rollers 19.
, pushes open the open/close plate 15a at the lower end of the intermediate frame 15, and falls onto the upper surface of the wire drawing roller 16.

Here, as shown in FIG. 2F, the fallen main rope 4
0 as a wire extension rope, extend two wires, one total, each on the upper surface of the wire extension roller 16, and temporarily tie them as shown in Fig. 2 (G) (Temporary tensioning of the wires).

After completing the pulling out and temporary hoisting of the four wires on the upper phase as described above, pull the rope connecting the metal wheels to the hanging wheel.
while collecting the external frame 12 at either end of the span.
is detached from each of the temporarily raised electric wires, and deployed onto the main rope 40 of the middle phase.

Thereafter, in the same manner as described above, the wires of the middle phase and the lower phase can be pulled out and temporarily put on four wires at a time.

As described above, just one preparatory work is required to complete 1
Capable of pulling out and temporarily hoisting four wires. Furthermore, since two wires can be simultaneously stretched under low tension and without reversing the metal wheel, stable wire stretching can be achieved.

Note that the present invention is not limited to the above embodiments.

That is, in the embodiment, the present invention is applied to the extension of a four-conductor line, and it is possible to pull out and temporarily lift conductors such as 8.1 conductors for the number of times the preparation work is performed. By appropriately combining with the frame, single conductor,
Of course, it is possible to extend multiple conductors.

[Effect of the invention].

As is clear from the above, according to the multi-strip wire extension method of the present invention, multi-strip wires can be extended by performing the preparatory work of deploying the hanging wheel over the span only once. It is possible to save the trouble of extending electric wires on multi-stranded lines, and it is possible to improve the workability and safety of the wire extension work. In addition, since two or more wires can be stretched at the same time with low tension, it is possible to not only improve the safety and workability of wire-stretching work, but also to improve the performance of the wires that have been laid. Can be done.

[Brief explanation of the drawing]

Figure 1A is a front view of the hanging wheel used in the wire extension method of the present invention, Figure 1B is its side view, Figure 2Ai, A,
, A, - Figure 2 H, H2, H, are schematic diagrams showing the process of the method of the present invention, Figure 3 A is a schematic diagram of the conventional non-reversible metal wheel when wires are being pulled out, and Figure 3 B is a schematic diagram showing the process of the method of the present invention. Schematic diagram of the temporary lifting of the wire, No. 4
Figures A to A are schematic diagrams showing the steps of a conventional wire stretching method using a hanging wheel.

Claims (1)

[Claims] A post-wire hanging wheel support roller located at the upper end of the frame and having a number equal to the corresponding number of conductor strips, two hanging wheel support rollers located outside these rollers, and the post-wire hanging wheel supporting rollers. A hanging wheel is used, which is equipped with the same number of wire stretching rollers located directly below the support rollers, and has an opening/closing plate at the lower end of the intermediate frame that separates the hanging wheel support rollers from the wire stretching rollers. The hanging wheel support roller is engaged with two main ropes that have been stretched out in advance, so that the hanging wheel is expanded and supported by the main ropes, and the extended ropes that have been placed along each of the main ropes in advance are used. simultaneously stretching a plurality of wires forming a phase onto the wire stretching roller;
After temporarily hoisting these electric wires, the main rope is relaxed, the main rope is pushed open the opening/closing plate, and is dropped onto the wire extension roller,
A multi-strand wire extension method characterized in that these main ropes are used as wire extension ropes to extend the next wire.