JP3175384B2 - Drum winding wire for prefabricated overhead wire - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire used for a prefabricated overhead line construction method of an overhead transmission line, and more particularly to a drum winding structure of an electric wire to be wired in a plurality of tension sections.

[0002]

2. Description of the Related Art Conventionally, a prefabricated overhead line construction method of an overhead transmission line has been performed as follows. That is, in a factory, an electric wire with a precision measuring mark is wound around a drum and shipped, and after carrying it to a construction site, the electric wire is pulled out of the drum and drawn through a wire drawing vehicle. At that time, when the precision measuring mark passed the wire drawing car, the extension was temporarily suspended, the required length was corrected based on the precision measuring mark, and the wire was cut.
The retention clamp is compression-fixed to the cut end. When the attachment of the retaining clamp is completed, the extension is resumed. In this way, wire drawing is performed while cutting the electric wire and attaching the clamp in succession, and after the completion of the wire drawing, the clamp is attached to the tension-resistant tower via a series of insulators.

However, this method has a drawback that it takes a long time to perform the wire drawing work because the wire is cut and the clamps are attached at the exit side of the wire drawing vehicle, that is, where the wire drawing tension is applied. In recent years, a railway line has been developed that allows an end clamp clamped to the end of an electric wire to pass through.
A so-called complete prefabricated wire-line construction method in which a tension clamp is compression-fixed to both ends of the electric wire before the wire-line construction and then the wire is extended is being studied.

[0004] In the complete prefabricated wire line construction method, the following methods have been proposed in order to attach the retaining clamps to both ends of the electric wire in one tension section in a preparatory stage before extension. That is, in a factory, an electric wire with a precision measuring mark as shown in FIG. 8 is wound around a drum and shipped. The drum 1 is provided with a partition flange 3C near one flange 3A between the flanges 3A and 3B at both ends of the body 2, and the one flange 3A and the partition flange 3C are provided.
Between the winding start end 4s side of the wire 4 for the required length,
The subsequent electric wire 4 is wound between the partition flange 3C and the other flange 3B.

At the construction site, the winding start end 4s of the electric wire 4 is unwound from the drum carried in the state shown in FIG. 8 until a precision measuring mark 5s comes out, and a correction measuring scale is used based on the precision measuring mark 5s. Then, the wire is cut and the clamp clamped, and the winding end 4e of the wire 4 is also unwound until the precision measuring mark 5e appears, and then the wire is cut and the clamp clamped. After that, the electric wire 4 is pulled out from the winding end 4e side, and the wire drawing operation is performed through a wire-drawing wheel of a type passing through a clamp. This eliminates the need for any work on the exit side of the line drawing vehicle, and enables safe and efficient line drawing work.

[0006]

The electric wire for overhead power transmission lines is usually 1000 m to 2000 m in one drum unit, but in the above-mentioned complete prefabricated wiring method, one tension section is one.
When a tension section is 300 to 600 m, a short electric wire must be manufactured in a large number of times, resulting in poor production efficiency. Also, since the number of drums is increased by two to three times, drum cost and transportation are increased. There is a problem that expenses are greatly increased.

[0007]

Assuming that a first tension section A and a second tension section B continue as shown in FIG. 9, an electric wire for the first tension section A is used. 4A and the electric wire 4B for the second tension section B are separately manufactured, and if the electric wire 4A can be wound on one drum rather than wound on another drum, the electric wire 4A
And the electric wire 4B are continuously manufactured and wound on one drum, so that the production efficiency is high and the transportation cost is low. In FIG. 9, 11 is a tension tower, 12 is a tension insulator, 13
Is an anchor clamp, 14 is a jumper wire, 15 is a suspension tower, and 16 is a suspension insulator.

Accordingly, the present invention has a main winding portion having a large flange interval and an auxiliary winding portion having a small flange interval, and a plurality of main winding portions are provided so that the auxiliary winding portion is located on at least one side of the main winding portion. The composite drum is wound around each main winding portion of the composite drum, and an electric wire for each tension section having a precision measuring mark as a reference for determining the position of attachment of the retaining clamp is wound around each end. At least the winding start end of the electric wire is wound around the auxiliary winding portion including the precision measuring mark.

[0009]

When the composite drum as described above is used, after one tension section is wound around one main winding section, the electric wire of the next tension section of the next main winding section can be wound. Can be manufactured almost continuously.
Further, since the electric wires in a plurality of tension sections can be transported by one drum, the transportation cost is also reduced. Furthermore, since each wire is wound at least on the auxiliary winding part including the precision measuring mark at the winding start end, at the construction site, unwind the winding start end and winding end until the precision measuring mark appears, Based on the precision measuring mark, the electric wire can be cut and the attachment clamp can be attached. For this reason, it is possible to prepare an electric wire with an end clamp for each tension section at the entrance side of the line drawing vehicle.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a drum wound wire for a prefabricated overhead wire according to an embodiment of the present invention. The composite drum 21 used here is provided with four partition flanges 23C to 23F between the flanges 23A and 23B at both ends of the body 22, and has two main winding portions 24A and 24B with a large flange interval and a small flange interval. Three auxiliary winding portions 25A to 25C are formed, and the main winding portions and the auxiliary winding portions are alternately arranged such that the auxiliary winding portions are located on both sides of each main winding portion. In addition, each partition collar 23C-2
A cut 26 for passing an electric wire from the auxiliary winding portion to the main winding portion or from the main winding portion to the auxiliary winding portion is formed in 3F.

In an electric wire manufacturing plant, an electric wire installed in two tension sections is wound around the composite drum 21. First, the electric wire 4A installed in the first tension section is wound as follows.
First, the winding start end 4s is wound around the auxiliary winding portion 25A for a required length so as to include the precision measuring mark 5s, and then is transferred from the auxiliary winding portion 25A to the main winding portion 24A so as to have the length of the first tension section. Most of them are aligned and wrapped around the main winding portion 24A, and then transferred from the main winding portion 24A to the auxiliary winding portion 25B, and the winding end end 4e is wound on the auxiliary winding portion 25B so as to include the precision measuring mark 5e. Wrap.

When the winding of the first tension section wire 4A is completed, the wire is cut there, and then the second tension section wire 4B is wound as follows. First, the winding start end 4s is wound around the auxiliary winding portion 25B for a required length so as to include the precision measuring mark 5s, and then transferred from the auxiliary winding portion 25B to the main winding portion 24B to have the length of the second tension section. Most of them are aligned and wrapped around the main winding portion 24B, and then the main winding portion 2B is wound.
4B to the auxiliary winding part 25C, and the winding end end 4e is set to the auxiliary winding part 25C so as to include the precision measuring mark 5e.
And wrap it around the required length. Since the above-described winding can be performed in the wire manufacturing plant, the wires in the two tension sections can be manufactured almost continuously.

[0013] The drum-wound electric wire wound as described above is shipped from a factory and carried into a construction site. At the construction site, the following work is performed before extension. That is, the winding start end 4s and the winding end 4e of the electric wires 4A and 4B are unwound from the auxiliary winding portions 25A to 25C until the precision measuring marks 5s and 5e come out, and the auxiliary measuring marks 5s and 5e are used as references. The measuring is performed, the electric wires are cut, and the end clamps 27A to 27D are compression-fixed to the ends of the electric wires as shown in FIG. Also, a retention clamp 27B on the winding end end side of the electric wire 4A,
The wire 4 </ b> B is connected to a retention clamp 27 </ b> C at the winding start end by a wire rope 28.

In this state, the wire 4B for the second tension section is used.
The wire is pulled out from the winding end end 4e side of the wire and is drawn through a draw clamp passing type drawing wheel. Thereby, it is possible to continuously extend the two tension sections without performing the work on the exit side of the extension line vehicle.

FIG. 3 shows another embodiment of the present invention. The composite drum 21 used here includes a flange 23 at both ends of the body 22.
A and 23B are provided with three partition flanges 23C to 23E, and two main winding portions 24A and 24B with a large flange interval and two auxiliary winding portions 25A and 25B with a small flange interval are defined as a main winding portion. The auxiliary winding portions are formed so as to be alternately arranged. In this type, the first main winding portion 24A has auxiliary winding portions 25A and 2BB on both sides, whereas the second main winding portion 24B has only one auxiliary winding portion 25B on one side. The winding method of the electric wires 4A and 4B is the same as that of the embodiment of FIG. 1 except that the winding end 4e of the electric wire 4B is located in the second main winding portion 24B.

FIG. 4 shows a state in which the drum-wound electric wire of FIG. 3 is carried into a construction site, and the clamps 27A to 27D are compressed and fixed before being extended, and the clamps 27B and 27C are connected by a wire rope 28. Show. The extension method is the same as that in FIG. 3 and FIG.
2 and the same parts as those in FIG.
Detailed description other than the above is omitted.

FIG. 5 shows still another embodiment of the present invention. The composite drum 21 used here has two partition flanges 23C, 23D between the flanges 23A, 23B at both ends of the body 22.
To provide two main winding portions 24A, 24
One auxiliary winding portion 25A having a small flange interval is formed between B and B. In this type, two main winding portions 24 are provided.
A and 24B each have an auxiliary winding portion 25 common to only one side.
A. The winding method of the electric wires 4A and 4B is such that the winding start end 4s is located in the auxiliary winding portion 25A and the winding end end 4e is located in the main winding portions 24A and 24B. This type is the most compact. Except for the above, the configuration is the same as that of the embodiment of FIG.

FIG. 6 shows still another embodiment of the present invention. The composite drum 21 used here has three partition flanges 23C to 23E between the flanges 23A and 23B at both ends of the body 22.
And the two main winding portions 24A, 24
B and two auxiliary winding portions 25A and 25B with a small flange interval are formed, and the auxiliary winding portions 25A and 25B are located at both ends of the body 22. How to wind the wires 4A, 4B
The winding start ends 4s are auxiliary winding portions 25A and 25B, respectively.
And the winding end 4e is located at the main winding portion 24A, 24
B. Except for the above, the configuration is the same as that of the embodiment of FIG.

FIG. 7 shows still another embodiment of the present invention. The composite drum 21 used here has six partition flanges 23C to 23H between the flanges 23A and 23B at both ends of the body 22.
Are provided, and three main winding portions 24A to 24
C and four auxiliary winding portions 25A to 25D having a small flange interval. The main winding portions and the auxiliary winding portions are alternately arranged so that the auxiliary winding portions are located on both sides of the main winding portion.

The composite drum 21 has three main winding portions 24.
The electric wires 4A to 4C in the three tension sections are wound around A to 24C. The winding method of the electric wires 4A to 4C is the same as the embodiment of FIG. 1 except that the main winding part and the auxiliary winding part are increased by one. Is the same as Since the configuration other than the above is the same as that of FIG. 1,
The same portions are denoted by the same reference numerals and description thereof will be omitted. Note that, even when there are three main winding portions, modified forms as shown in FIGS. 3, 5, and 6 can be adopted.

In each of the above embodiments, the electric wires in the plurality of tension sections are cut for each section and wound around the composite drum. Can be continuously wound, and after manufacturing the wires, the wires can be cut into sections in a factory or a construction site. For this purpose, the wire wound around the auxiliary winding portion may have a margin (slack) for cutting. If there is no need for an auxiliary measuring tool at the construction site, it is possible to perform the installation up to the installation of the retaining clamp at the factory.

[0022]

As described above, according to the present invention, the electric wires to be laid in a plurality of tension sections can be wound around one drum, so that it is possible to efficiently manufacture the wires for prefabricated trolley wires. And transportation costs can be reduced. Also, since each wire is wound at least at the auxiliary winding part including the precision measuring mark at the beginning of winding, unwind the winding start end and winding end until the precision measuring mark appears,
Based on the precision measuring mark, the electric wire can be cut and the retaining clamp can be attached, and the prefabricated overhead wire can be easily performed.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a drum wound electric wire for a prefabricated overhead line according to the present invention.

FIG. 2 is a front view showing a state in which a retaining clamp is attached to the drum winding wire of FIG. 1;

FIG. 3 is a front view showing another embodiment of the drum-wound electric wire according to the present invention.

FIG. 4 is a front view showing a state in which a retaining clamp is attached to the drum winding wire of FIG. 3;

FIG. 5 is a front view showing still another embodiment of the drum-wound electric wire according to the present invention.

FIG. 6 is a front view showing still another embodiment of the drum-wound electric wire according to the present invention.

FIG. 7 is a front view showing still another embodiment of the drum-wound electric wire according to the present invention.

FIG. 8 is a front view showing a drum winding wire for a prefabricated overhead wire which has been studied in the past.

FIG. 9 is an explanatory view showing two tension sections of an overhead transmission line.

[Explanation of symbols]

4A: Wire for first tension section 4B: Wire for second tension section 4s: Winding end 4e: Winding end 5s, 5e: Precision measuring mark 21: Composite drum 22: Body 23A -23H: Tsuba 24A-24C: Main winding part 25A-25D: Auxiliary winding part 26: Cut 27A-27D: Retention clamp 28: Wire rope

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-3-93413 (JP, A) JP-A-5-97328 (JP, A) JP-A-5-344619 (JP, A) (58) Investigation Field (Int.Cl. ⁷ , DB name) H02G 1/02 B65H 54/34 B65H 55/04 B65H 75/14

Claims (3)

(57) [Claims] A composite drum having a main winding portion having a large flange interval and an auxiliary winding portion having a small flange interval, wherein a plurality of main winding portions are provided such that the auxiliary winding portion is located on at least one side of the main winding portion. Using each of the main winding portions of the composite drum, wind the electric wire for each tension section with a precision measuring mark provided near each end as a reference for determining the attachment position of the retaining clamp, and start winding at least each of the electric wires. A drum-wound electric wire for a prefabricated overhead line, wherein an end portion is wound around an auxiliary winding portion including the precision measuring mark. 2. A composite drum having a main winding portion having a large flange interval and an auxiliary winding portion having a small flange interval, and having a plurality of main winding portions provided on both sides of the main winding portion so that the auxiliary winding portions are located. Using each of the main winding portions of this composite drum, wind the electric wire for each tension section with a precision measuring mark on each end near which the reference for determining the mounting position of the retaining clamp is attached. And a winding end end including the precision measuring mark is wound around the auxiliary winding portion. 3. A composite drum having a main winding portion having a large flange interval and an auxiliary winding portion having a small flange interval, wherein a plurality of main winding portions are provided such that the auxiliary winding portion is located on one side of the main winding portion. Using each of the main winding portions of this composite drum, wind the electric wire for each tension section with a precision measuring mark on each end near which the reference for determining the mounting position of the retaining clamp is attached. Is wound around the auxiliary winding part including the precision measuring mark, and the winding end is wound around the main winding part.