JP2001016731A - Method of repairing cable anchoring part in overhead transmission line, and cable anchoring structure of the overhead transmission line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the possibility of strength drop of a cable anchoring part which occurs, when the existing cable is overheated again due to long time use after a repair. SOLUTION: When repairing the cable anchoring section of an existing cable 1 anchored to a high-tension steel tower with a compressive anchor clamp 2, the existing cable 1 is anchored to the side of a steel tower via a terminal mounting metal fitting 25 and a coupling metal fitting 26, clamped with a wedge of anchor clamp 23. A terminal 27 for socket divergence is attached to the terminal metal fitting 25. The socket 28 of a bond cable 29 fitted with a socket is connected to one socket connection 27a of the terminal 2 for socket divergence, and the jumper socket 9 of an existing jumper cable 8 is connected to the other socket connection 27b. The bond cable 29, fitted with a socket and the existing cable 1, is connected through compression with a connector sleeve 30. The wedge-type anchoring clamp 23 bears a large tension of the cable between high-tension steel towers, and the electric connection is performed at the place upon which large tension does not fall.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension type tower in which an overhead transmission line using a steel core aluminum stranded wire is retained by a compression type retention clamp, and the compression type anchorage compression-connected to an electric wire (an overhead transmission line). When the compression portion of the clamp deteriorates and heat is generated, the method of repairing the wire retaining portion of the overhead transmission line for repairing the wire retaining portion by the compression type retaining clamp, and the overhead used during such repair The present invention relates to an electric wire retaining structure for a transmission line.

[0002]

2. Description of the Related Art FIG. 13 shows a general example of an electric wire retaining portion and a jumper device in a tension tower in which an overhead transmission line 1 using a steel core aluminum stranded wire is retained by a compression type retaining clamp 2 on one side of the tower. Show. In the drawing, reference numeral 3 denotes a span-side insulator connecting metal fitting comprising a sag adjusting metal fitting 4, a yoke 5, and the like;
Denotes a series of tension insulators, and 7 denotes a arm of a tension tower (the tension plate is shown in the figure). The compression-type retention clamp 2 compresses and fixes the steel core of a steel core aluminum stranded wire (aerial power transmission line 1) with a built-in steel clamp, bears the tension of tensile support, and uses an aluminum clamp on the outer surface to form an aluminum The stranded wire is compressed to obtain an electrical connection. The overhead power transmission line 1 is gripped by the compression-type anchor clamp 2 as described above, and the span-side insulator metal fitting 3,
It is fastened to the arm 7 of the tower via the tension insulators 6 and the like. The jumper device connects a jumper socket 9 compression-connected to both ends of a jumper wire 8 which is a stranded wire to a socket connection portion of a compression type clamping clamp 2 on both sides of the tower to electrically connect the transmission line main line 1 on both sides of the tower. Connecting.

In a tension tower in which the overhead power transmission line 1 is retained by the compression type retention clamp 2 as described above, the compression part of the compression type retention clamp 2 connected to the electric wire (overhead transmission line) 1 may generate heat. The following are considered. (A) An oxide film is formed on the surface of the aluminum wire due to the chemical reaction of the anticorrosion compound in the compression type clamp, and the electrical resistance increases to generate heat. (B) Rain water, salt water, acid rain, etc., enter the gaps between the wires of the electric wire, and the aluminum surface is corroded to form an oxide film, thereby increasing electric resistance and generating heat. In this case, the heat generation further increases the oxide film, and a vicious cycle occurs in which the calorific value further increases.

It is necessary to modify the compression type anchor clamp 2 which has generated heat as described above. As a conventional method of repairing the wire retaining portion, there are the following methods, for example. As shown in FIG. 9 (a), the electric wire 1 is cut at the end of the end clamp of the electric wire 1 (at the point indicated by “x”), and as shown in FIG. Recompression is performed using a new long compression type retention clamp 2A which is the same as the position of the compression type retention clamp 2 on the proximal side of the steel clamp. As shown in FIG. 10, the electric wire 1 is cut and removed at the end of the end clamp of the electric wire 1 and recompressed by a new compression type end clamp 2 ′ having the same structure as the existing compression type end clamp 2.
The connecting fitting 11 is additionally inserted by the length of the electric wire 1 that has become insufficient. As shown in FIG. 11, at a position about 5 to 10 m away from the mouth of the existing compression-type anchoring clamp 2 for the electric wire 1,
Is cut, and the existing electric wire 1 and the newly prepared interrupting electric wire 1 ′ are compression-connected by a linear sleeve 12, and this interrupting electric wire 1 ′ is compressed with the same structure as that of the existing compression type retaining clamp 2. The clamp 2 'is compressed in the same position. As shown in FIG. 12, for the purpose of reducing the current flowing to the existing compression type anchoring clamp 2 which has generated heat, the bypass line 15 for bypass connection between the main line (electric wire 1) and the jumper line 8 is PG clamped. 13 and 14 are additionally attached.

[0005]

However, the above-mentioned conventional methods have the following problems. The above method (Fig. 9)
In the case of (1), since the jumper wire 8 is taken out at the same position as the existing retaining part (ie, the position of the jumper socket 9), the existing jumper wire 8 and the jumper socket 9 can be used as they are, It is not economical to use the retaining clamp 2A. In addition, the existing electric wire 1 used for many years in the high tension portion in the span is to be recompressed and used. However, if the surface of the existing electric wire 1 is not sufficiently polished, it immediately leads to a cause of heat generation. Particularly, since the elongation of the aluminum strand of ACSR, which is significantly corroded by aluminum hydroxide, is remarkably reduced, there is a problem in terms of mechanical strength due to compression.

In the above method (FIG. 10), since the position of the jumper socket attachment point is changed, it is necessary to modify the jumper wire (8 'is a modified jumper wire, 9' is a jumper socket). In the case of a conductor, there is a problem that the formability is impaired because irregular jumper wires occur. In addition, as in the case described above, there is a problem associated with recompressing and using the existing electric wire 1 in a portion having a high tension in the span.

In the case of the above method (FIG. 11), the existing product can be used for the jumper wire 8 as it is, but the work of performing a straight joint with the straight sleeve 12 within the span is not easy and requires a lot of time for construction. And Further, as in the case described above, there is a concern that the existing electric wire 1 is recompressed and used in a portion having a high tension in the span.

In the case of the above method (FIG. 12), it is considered to be an effective method in the case of emergency treatment. However, the heated compression clamp 2 remains as it is, and the PG clamps 13, 1
No. 4 is for obtaining an electrical connection by bolting, and a sufficient tightening pressure is not obtained even if an old wire (existing electric wire 1) covered with aluminum hydroxide or the like as an insulator is obtained, so that sufficient conductivity is obtained. In addition, there is a risk that a new heat generation trouble may occur when creeping of the electric wire or loosening of the bolt due to some cause occur over time. In addition, since the outer periphery of the existing wire 1 and the existing jumper wire 8 is gripped by the PG clamps 13 and 14 to obtain an electrical connection, it is difficult to control the polishing of the surfaces of the existing wire 1 and the existing jumper wire 8. Then, the function of the bypass becomes insufficient and there are many problems to use as a permanent measure.

An object of the present invention is to provide a method for repairing a wire retaining portion of an overhead transmission line which does not have the drawbacks of the above conventional methods, and a wire retaining structure for the overhead transmission line.

[0010]

SUMMARY OF THE INVENTION The present invention for solving the above-mentioned problems is a method of repairing a wire retaining portion of an overhead transmission line for repairing a portion of the overhead transmission line using a compression type anchor clamp. Characterized by having a step of: The existing wire is gripped at a position which is appropriately away from the span-side insulator metal fitting with the gripping tool, and the wire connected to the gripping tool is pulled to loosen the portion of the existing wire located closer to the tower than the gripping tool. . Attach a wedge type clamp at a required position of the existing electric wire closer to the steel tower than the gripping tool. A required length portion of the existing electric wire, which is located closer to the steel tower than the wedge-type anchoring clamp, is cut. The existing compression type clamp is detached from the span side insulator connecting metal fitting, and the jumper socket attached to the existing jumper wire is removed from the existing compression type clamp. A terminal mounting bracket is attached to the span side insulator connecting bracket, the terminal mounting bracket is connected to the wedge-type retention clamp via a connecting bracket having a predetermined length, and the wire is further loosened to loosen the terminal mounting bracket. After the tension is applied to the connection fitting, the gripping tool is removed from the existing electric wire. A socket branching terminal having two socket connecting portions is mounted on the terminal mounting bracket. The bond wire with socket and the existing electric wire are connected via the connection sleeve. The socket of the bond wire with a socket is connected to one socket connection portion of the socket branching terminal. The jumper socket of the existing jumper line is connected to the other socket connection part of the socket branching terminal.

A second aspect of the present invention is a wire retaining structure for an overhead transmission line applied when a retaining portion of an overhead transmission line is repaired by a compression type retaining clamp, wherein the overhead transmission line is clamped by a wedge-type retaining clamp. A spanner-side insulator connecting metal fitting and the wedge-type retaining clamp are connected via a terminal mounting metal fitting and a connecting metal fitting to tension-support the overhead transmission line, and the terminal mounting metal fitting has two socket connection portions. A branch terminal is attached, a socket of a bond wire with a socket is connected to one of the socket connection portions of the socket branch terminal, and the end portion of the bond wire with the socket and the wedge-type end clamp of the existing wire are used as the span insulator. The end of the part extended to the metal fitting side is connected to each other by a connection sleeve, and the zipper attached to the existing jumper wire Characterized in that the Pasoketto connected to the other socket connection of the socket branching terminals.

A third aspect of the present invention is characterized in that the connecting fitting of the second aspect partially includes a locking tool having a locking portion for locking the wire.

[0013]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIGS. The embodiments described below are:
It is intended to repair the portion of the compression type anchoring clamp 2 (that is, the wire retaining portion) of the overhead transmission line 1 as shown in FIG. 13 described above. , 6 denotes a tension insulator series, and 7 denotes an arm (a tension plate thereof in the drawing) of a tension tower. The compression-type retention clamp 2 compresses and fixes the steel core of a steel core aluminum stranded wire (aerial power transmission line 1) with a built-in steel clamp, bears the tension of tensile support, and uses an aluminum clamp on the outer surface to form an aluminum The stranded wire is compressed to obtain an electrical connection. The overhead power transmission line 1 is gripped by the compression type anchoring clamp 2 as described above, and is fastened to the steel arm 7 of the steel tower via the span-side insulator connection metal fitting 3, the tension insulator connection 6, and the like. The jumper device connects a jumper socket 9 compression-connected to both ends of a jumper wire 8 which is a stranded wire to a socket connection portion of a compression type clamping clamp 2 on both sides of the tower to electrically connect the transmission line main line 1 on both sides of the tower. Connecting.

The overhead transmission line 1 of the embodiment is a four-conductor transmission line, and a description will be given of a case in which one of the overhead lines is modified. Fig. 1 shows one line of the skyline, (a) shows the state before the repair, and (b) shows the state after the repair. Although the illustration of the intermediate state is omitted, the repair work is performed in the following procedures. As shown schematically by a two-dot chain line in FIG. 1 (a), a cam-along (gripping tool) 20 is attached to a position of the existing electric wire (aerial power transmission line) 1 at a distance from the spanner insulator fitting 3 as appropriate. 1 and pulling the wire 21 connected to the cam-along 20, the cam-along 20 of the existing electric wire 1 is pulled.
The part located closer to the tower is loosened. This wire pulling work is performed by connecting the wire 21 and the pulley 2 between the cam-along 20 and the span-side insulator connecting metal fitting 3, for example, the sag adjusting metal fitting 4.
2 (including at least the moving pulley) or the like, it is preferable to form a pulley type traction mechanism (a method generally used for tightening work during overhead line work, which is generally referred to as forming a hook). In that case, one side is connected to, for example, an adjustment hole of the sag adjustment fitting 4. A wedge type clamp 23 (details will be described later) is attached to a required portion of the existing electric wire 1 that is located closer to the steel tower than the cam along 20 (the right side in FIG. 1). A predetermined position of the existing electric wire 1 on the steel tower side with respect to the wedge-type anchoring clamp 23 (for example, a position generally indicated by a cross in FIG. 1A) is cut. Actually, at this stage, a position close to the compression type clamp 2 is cut, and an appropriate position is cut later. The existing compression type clamping clamp 2 is removed from the span side insulator connecting metal fitting 3 (in the illustrated example, from the sag adjusting metal fitting 4). Also,
The jumper socket 9 attached to the existing jumper wire 8 is removed from the existing compression type clamp 2. A terminal mounting bracket 25 (details will be described later) is attached to the span side insulator connecting metal fitting 3 (slack adjusting metal fitting 4), and the terminal mounting metal fitting 25 and the wedge-shaped retaining clamp 23 are connected to a connecting metal fitting 26 having a predetermined length. Connect via here,
The predetermined length is a length such that the sag and tension of the existing electric wire (the overhead transmission line between the spans) 1 become the same as before the repair. Next, the wire 21 that has been drawing the existing electric wire 1 is loosened to apply tension to the terminal mounting bracket 25 and the connecting bracket 26. Next, the cam along 20 is removed from the existing electric wire 1. Further, the pulley type traction mechanism including the wire 21, the pulley 22, and the like is removed. The terminal mounting bracket 25 has a socket branching terminal 27 having two socket connecting portions (details will be described later).
Attach. An existing electric wire 1 is compression-connected to the existing electric wire 1 through a connection sleeve 30. In this case, the existing electric wire (steel core aluminum stranded wire) 1 that has been used for many years is subjected to surface polishing of the outer peripheral portion, that is, the aluminum stranded wire portion. The socket 28 of the bond wire 29 with a socket is connected to one socket connecting portion 27 a of the socket branching terminal 27. The jumper socket 9 of the existing jumper wire 8 is connected to the other socket connection portion 27b of the socket branching terminal 27. Further, the connection fitting 26 and the bond wire 29 with socket are gripped by the two grip portions of the two-conductor spacer 31, respectively, and the vicinity of the connection sleeve 30 of the bond wire 29 with socket is supported. As described above, the repair of the wire retaining portion of the existing overhead transmission line, that is, the portion of the existing compression type retaining clamp 2 is completed.

As shown in detail in FIG. 6, the wedge-shaped retaining clamp 23 has a main body 23 made of an aluminum alloy.
a, two wedges 23b and 23c, a hanger 23d, a jumper guide 23e, and the like. The electric wire (the existing electric wire 1) is sandwiched between the two wedges 23b and 23c, and is inserted into the hollow portion of the main body 23a and gripped. The body 23a is taken out smoothly by the jumper guide 23e, and the main body 23a is connected to the connection fitting 26 by the hanger 23d. In addition, about the structure of a wedge-type retention clamp, in the embodiment, two wedges 23b and 23c are used.
Although the wedge-type anchoring clamp 23 having the above structure is used, the invention is not limited to this, and any structure such as a structure having one wedge and holding the electric wire between the U-groove bottom surface of the main body and the like can be used.

The details of the terminal fitting 25 and the socket branching terminal 27 are shown in FIGS. The terminal mounting bracket 25 is a T-shaped steel plate, and has connection holes 25b at both ends of a horizontal portion 25a, and a vertical portion 25c.
Is provided with a coupling hole 25d. The socket branching terminal 27 is made of aluminum, has a plate shape bent into a slightly elongated L-shape when viewed from above (FIG. 4), and has flat socket connection portions 27a and 27b at both ends. Bolt insertion holes 27c and 27d are formed in the connection portions 27a and 27b, and a connection hole 27e for connecting to the terminal fitting 25 is formed in an intermediate portion. The socket branching terminal 27 is fixed to the terminal mounting bracket 25 with bolts 33.

The bond wire 29 with a socket has a socket (same structure as a jumper socket) 28 previously connected to a bond wire (aluminum stranded wire) 29a by compression at a factory, and as shown in FIG. The bolt 34 is connected to one of the socket connecting portions 27a of the socket branching terminal 27.
To secure mechanically and electrically. The jumper socket 9 of the existing jumper wire 8 is connected to the other socket connecting portion 27 of the socket branching terminal 27.
b is fixedly fastened with bolts 35 and mechanically and electrically connected.

As shown in FIG. 1B, the connection fitting 26 of the embodiment is formed by connecting three rod-type parallel clevis links 26a. Note that the current path is on the side of the bond wire with socket 29, and it is not preferable that even a small amount of electricity flows (that is, a shunt occurs) on the connection fitting 26 side. However, when this shunt becomes a problem, FIG. As shown in (1), it is preferable to interpose an insulator 36 such as a suspension insulator generally used in a suspension tower and a tension tower between the rod-type parallel clevis links 26a to interrupt the current.

In the above-mentioned repair method, the existing electric wire 1 (span electric wire) is retained on the tension tower side via the wedge-type anchoring clamp 23, and is connected to the existing electric wire 1 via the connection sleeve 30. There is no significant tension on line 29. That is, in this repair method, a large tension for supporting the span electric wire 1 in the electric wire retaining portion is borne by the wedge-type retaining clamp 23, and the electrical connection between the existing electric wire 1 and the jumper wire 8 is large. Connection sleeve 3 in socketed bond wire 29 without tension
Since the connection is performed by the compression connection of 0, even if the existing electric wire 1 after the repair is overheated for a long time, there is no danger of the strength drop due to overheating, and there is no danger of disconnection due to the drop in strength due to overheating. In other words, maintenance concerns associated with recompressing and using existing wires that have been used for many years are eliminated. In addition, since the socket branching terminal 27 can be arranged at the same position as the existing compression type anchoring clamp 2, the existing jumper wire 8 to which the jumper socket 9 has been compression-connected can be used as it is, reducing costs and reducing construction time. Shortening can be achieved. If overheating occurs in the portion of the jumper socket 9 compression-connected to the existing jumper wire 8, a prefabricated jumper in which a new jumper socket is compression-connected at both ends of the new jumper wire is used in advance at the factory. In addition, replacement on site can be performed very easily. In addition, since this repair method uses the wedge-type stay clamp 23 without using the compression-type stay clamp, workability of the repair work is also good in this regard. That is, when the compression-type retention clamp 2 is compression-fixed to the steel core aluminum stranded wire, it is necessary to peel off the steel core aluminum stranded wire to expose the steel core, and the work is complicated. In step 23, the step of stripping is unnecessary, and workability is improved.

FIG. 7 shows another embodiment of the connection fitting in the present invention. This connecting metal fitting 26A is a special type in which hook holes 41c (locking portions for locking the wire 21) are provided between upper and lower portions of a disc 41b having connecting portions 41a mounted on both sides between the rod-type parallel clevis links 26a. The single link 41 (locking tool) is interposed. According to the connecting metal fitting 26A, when the above-described pulley-type traction mechanism is constructed (assembled with a hook) for drawing (pulling) the existing electric wire 1 toward the steel tower side, the special single link 41 and the span-side insulator gang are connected. A pulley type traction mechanism can be configured with the metal fitting 3 (the sag adjusting metal fitting 4 or the yoke 5). Therefore, the above-mentioned cam-along 20 becomes unnecessary, and workability is further improved.

[0021]

According to the present invention, the overhead power transmission line 1 is clamped by the wedge-type anchoring clamp 23, and is fixed to the steel tower side via the terminal fitting 25 and the connecting fitting 26, and is attached to the terminal fitting 25. One socket connection part 27 of the socket branching terminal 27
a to the socket 28 of the bond wire 29 with a socket, and the other jumper wire 8 to the other socket connection portion 27b.
The jumper socket 9 is connected, and the bond wire 29 with the socket and the existing electric wire 1 are connected via the connection sleeve 30. Therefore, the large tension for supporting the span electric wire is secured by the wedge-type clamp 23. The electric connection between the existing electric wire 1 and the jumper wire 8 is made by the compression connection of the connection sleeve 30 in the bond wire 29 with a socket which does not apply a large tension. Even if it is overheated during use, there is no danger of a decrease in strength due to overheating, and there is no danger of disconnection or the like due to a decrease in strength due to this overheating. In other words, maintenance concerns associated with recompressing and using the existing electric wire 1 used for many years are eliminated.

It is more economical than the conventional method in which a long compression clamp having a special structure is used.

Since the socket branching terminal 27 can be arranged at the same position as the existing compression type anchor clamp 2, unlike the conventional method, the existing jumper wire 8 to which the jumper socket 9 is compression-connected can be used as it is. It is possible to reduce the cost and the construction time. If overheating occurs in the portion of the jumper socket 9 compression-connected to the existing jumper wire 8, a prefabricated jumper in which a new jumper socket is compression-connected at both ends of the new jumper wire is used in advance at the factory. In addition, replacement on site can be performed very easily.

Wedge-type clamp 23 for existing electric wire 1
Mounting, connection of the existing electric wire 1 and the bond wire 29 with the socket by the connection sleeve 30 can be performed at a place not far from the span-side insulator connecting metal fitting 3, and a conventional linear joint is performed within the span. Workability is remarkably better than the method. Also, since the wedge-type holding clamp 23 is used without using the compression-type holding clamp, the steel core is exposed by stepping off the steel core aluminum stranded wire necessary for compression-fixing the compression-type holding clamp. This eliminates the need for complicated work, and also improves workability in this regard. In addition, since the existing compression type clamping clamp that has become overheated is removed, unlike the conventional method, there is no possibility that a new heat generation trouble will occur in the existing compression type clamping clamp for any reason. .

According to a third aspect of the present invention, when the locking tool 41 for locking the wire 21 is incorporated in a part of the connecting metal fitting 26,
When pulling the existing electric wire 1 toward the tower, it is not necessary to use a cam-along, and the workability is further improved.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view for explaining a method of repairing an electric wire retaining portion of an overhead transmission line according to an embodiment of the present invention, wherein (a) is near the electric wire retaining portion before the repair, and (b) is near the electric wire retaining portion after the repair. It is a side view which shows each.

FIG. 2 is an enlarged side view of the vicinity of a socket branching terminal in FIG.

FIG. 3 is a side view of the socket branching terminal in FIG. 2;

FIG. 4 is a plan view of the socket branching terminal in FIG. 2;

FIG. 5 is a perspective view of the socket branching terminal of FIG. 2 in a state where coupling bolts are removed.

FIG. 6 is an enlarged side view of the wedge-shaped retaining clamp in FIG.

FIG. 7 is a side view of the vicinity of an electric wire retaining portion showing another embodiment of the method for repairing the electric wire retaining portion of the present invention.

FIG. 8 is a side view showing another embodiment of the connection fitting of the present invention.

FIG. 9 is a view showing an example (method) of a conventional method of repairing a wire retaining portion, in which (a) is a side view before repair and (b) is a side view after repair.

FIG. 10 is a side view showing another example (method) of a conventional method of repairing a wire retaining portion.

FIG. 11 is a side view showing still another example (method) of a conventional method of repairing a wire retaining portion.

FIG. 12 is a side view showing still another example (method) of a conventional method of repairing a wire retaining portion.

FIG. 13 is a side view showing an existing wire retaining portion (a retaining portion in a state before the repair) and a jumper device of an overhead transmission line to which the method for repairing a wire retaining portion of the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Overhead power transmission line (existing electric wire) 2 Compression type anchor clamp 3 Spacing insulator metal fitting 4 Sagging adjustment metal fitting 5 Yoke 6 Tension insulator connection 7 Steel tower arm 8 Jumper wire 9 Jumper socket 20 Camlong (Grip tool) 21 Wire Reference Signs List 22 pulley 23 wedge-type retention clamp 23a body 23d hanger 25 terminal mounting bracket 25a horizontal portion 25b connection hole 25c vertical portion 25d, 27e connection hole 26, 26A connection fitting 26a rod-type parallel clevis link 27 socket branch terminal 27a, 27b socket connection Part 27c, d Bolt insertion hole 28 Socket 29 Bonded wire with socket 29a Bonded wire 30 Connection sleeve 31 2 Conductor spacer 34, 35 Bolt 36 Insulator 41 Special single link (locking tool)

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Takashi Kamiyama 1-1-3 Uchisaiwaicho, Chiyoda-ku, Tokyo Inside Tokyo Electric Power Company (72) Inventor Mitsuru Yasui 3-1-15-501F, Naka, Kunitachi-shi, Tokyo Terms (Reference) 5G367 EA02 EB03 EF02

Claims (3)

[Claims] 1. A method for repairing a wire retaining portion of an overhead transmission line for repairing a portion of an overhead transmission line by a compression type clamping clamp, the method comprising the following steps: A method of repairing the wire retaining portion The existing wire (1) is gripped by a gripping tool (20) at an appropriate distance from the span-side insulator connecting metal fitting (3).
The wire (21) connected to the wire (0) is pulled to loosen a portion of the existing electric wire (1) closer to the steel tower than the gripping tool (20). A wedge-type anchoring clamp (23) is attached to a required portion of the existing electric wire (1) closer to the steel tower than the gripping tool (20). The wedge-type anchoring clamp (23) for the existing electric wire (1)
Cut the required length portion located closer to the tower. The existing compression type clamp (2) is removed from the span side insulator connecting metal fitting (3), and the jumper socket (9) attached to the existing jumper wire (8) is removed from the existing compression type clamp (2). Remove from A terminal mounting bracket (25) is mounted on the span side insulator connecting bracket (3), and the terminal mounting bracket (25) is attached.
And the wedge-shaped retaining clamp (23) are connected via a connecting fitting (26) of a predetermined length, and the wire (21) is loosened to loosen the terminal mounting fitting (25) and the connecting fitting (26). After applying tension to the wire, the gripper (20) is removed from the existing electric wire (1). A socket branching terminal (27) having two socket connecting portions (27a) and (27b) is mounted on the terminal mounting bracket (25). The bond wire with socket (29) and the existing electric wire (1) are connected via the connection sleeve (30). The socket (2) of the bond wire with socket (29)
8) is connected to one socket connection part (27a) of the socket branching terminal (27). The jumper socket (9) of the existing jumper wire (8) is connected to the other socket connection part (27b) of the socket branching terminal (27). 2. A wire retaining structure for an overhead transmission line applied when a retaining portion of an overhead transmission line is fixed by a compression type retaining clamp, wherein the overhead transmission line (1) is a wedge-type retaining clamp (23). And the span-side insulator connecting metal fitting (3) and the wedge-shaped retaining clamp (23) are connected via a terminal mounting metal fitting (25) and a connecting metal fitting (26) to connect the overhead transmission line (1).
To the terminal mounting bracket (25).
A socket branch terminal (27) having two socket connection portions (27a) and (27b) is attached, and one socket connection portion (2) of the socket branch terminal (27) is attached.
7a), the socket (2) of the bond wire (29) with a socket.
8) and the wedge-type clamp (2) of the end of the bond wire with socket (29) and the existing electric wire (1).
The leading end of the part extending from 3) to the span-side insulator metal fitting (3) is connected to each other by a connecting sleeve (30),
The jumper socket (9) attached to the existing jumper wire (8) is connected to the socket branch terminal (2).
7) A wire retaining structure for an overhead transmission line, wherein the wire connection structure is connected to the other socket connection portion (27b) of (7). 3. The connecting fitting (26) is connected to a wire (2).
3. The wire retaining structure for an overhead transmission line according to claim 2, wherein a locking tool (41) having a locking portion (41c) for locking 1) is partially included.