JP2003259540A - Metal fitting for jumper wire connection and jumper wire connecting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure a distance between an insulator string and a jumper wire by adjusting a connection position so as to correspond to excess and deficiency of the re-used jumper wire. <P>SOLUTION: An anchor clamp C is compressively bonded on an end of a power transmission line in order to clamp the line on an arm metal of a steel tower. A jumper socket S is compressively bonded on the end of a jumper wire J. The socket S is connected to the clamp C via a metal fitting 1. The fitting 1 is provided with a pair of long plate members 2 which face each other in parallel, and a short plate member 3 which is inserted between the plates 2, 2 to be bolted. A plurality of adjusting bolt holes 4 for allowing connection bolts 5 for connecting the clamp C and the plate 3 to penetrate are provided in a longitudinal direction on each of the plates 2. One end side of the plate 3 is inserted between the plates 2 and is connected to the plates 2 with the bolts 5, and the socket S is connected to the other end side with the bolts 5. A connection position of the socket S to the fitting 1 can be adjusted by selecting connection bolt holes 6. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting metal fitting and a connecting method for a towing clamp for holding an overhead power transmission line to a tower and a jumper socket for connecting a jumper wire to the holding clamp.

[0002]

2. Description of the Related Art In the work of constructing a power transmission line on each steel tower, a strain relief clamp is compressed and connected in advance to the end of the electric wire.
After the wire has been extended, it is connected to the tower by holding the strain clamp to the insulator string. Jumper sockets, which are compressed and connected to both ends of the jumper wire, are fitted to the connecting portion of the detention clamp and fastened by connecting bolts. The detention clamp consists of a steel clamp that connects the steel core of the wire and an aluminum clamp made of aluminum or aluminum alloy that connects the aluminum wire. The jumper wire has a jumper socket, which is compressed and connected at both ends, and is connected to a detention clamp to form a current path between the transmission lines on both sides of the tower. Conventionally, in the connection structure of the detention clamp and the jumper socket, the bifurcated fitting connection part of the jumper socket is directly fitted to the plate-shaped connection part of the detention clamp, and is tightened and connected by a connection bolt.

[0003]

In the above-mentioned conventional connection structure, a new jumper wire having a suitable size is prepared when the tower is rebuilt by changing its shape or raising it. The size of the jumper wire is determined so as to conform to it because the distance from the insulator string to the jumper wire is defined in a predetermined range. Therefore, the size of the conventional jumper wire may not match the size of the new steel tower, so it cannot be reused as it is, the members are wasted, and the cost is increased. Therefore, according to the present invention, the connection position of the jumper wire is adjusted so that the distance from the insulator string to the jumper wire conforms to the specified range, and the shortage of the jumper wire size can be coped with. An object of the present invention is to provide a jumper wire connecting fitting to be used and a jumper wire connecting method.

[0004]

In order to solve the above problems, in the first invention, a connection for connecting a jumper socket S for connecting a jumper wire J and a retaining clamp C for an overhead power transmission line W. In the metal fitting 1, the connecting portion C1 of the retaining clamp C is provided between the one ends of the pair of long plate members 2 facing each other.
Is clamped and bolted, the short plate member 3 is inserted between the other ends and bolted, and the bifurcated connecting portion S1 of the jumper socket S is bolted to the short plate member 3 to form a pair of long plate members 2. A plurality of adjustment bolt holes 4 through which bolts 5 for connecting the retaining clamp C and the short plate member 3 are inserted are provided in the longitudinal direction, and the distance between the connecting portion C1 of the retaining clamp C and the connecting portion S1 of the jumper socket S is adjusted. Configured possible. In the second invention, the long plate member 8 is provided with the detent 9 against which the outer peripheral surface of the bolt head 5a abuts. In the third invention, the connecting portion C of the strain clamp C in the long plate member 11
The coupling portion 11a corresponding to No. 1 was formed laterally offset with respect to the extension direction of the intermediate portion having the adjustment bolt hole 4, and the power transmission line W and the jumper wire J were arranged on the same plane. Fourth
In the invention described above, the pair of long plate members 8 and 8 are integrally formed by making one ends thereof continuous with each other. In the fifth invention,
In the method of connecting the holding clamp C for holding the transmission line W and the jumper socket S to connect the jumper wire J interposed between the overhead power transmission lines W and W, a plurality of adjustment bolt holes 4 are provided in the longitudinal direction, respectively. The holding clamp C and the short plate member are inserted into the holding clamp C at one end of the pair of opposed long plate members 2 and 2 and the short plate member 3 for bolting the jumper socket S at the other end thereof, respectively, and bolted. The jumper wire connection method is adopted so as to adjust the distance between the retaining clamp C and the jumper socket S by selecting the adjusting bolt hole 4 through which the bolt 5 for connecting the cable 3 and 3 is inserted.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described with reference to FIGS. In the figure, overhead power line W
The retention clamp C, which is compression-connected to the end of the, is supported by the armature of the steel tower through a series of insulators (not shown). Jumper line J
Jumper sockets S are compression-connected to both ends of. The jumper socket S is electrically and mechanically connected to the detention clamp C via the connection fitting 1. The detention clamp C and the jumper socket S have the same shape as the conventional one, and the bifurcated connection portion S1 of the jumper socket S can be connected to the plate-shaped connection portion C1 of the detention clamp C.

The connection fitting 1 is provided with a pair of parallel long plate members 2 facing each other and a short plate member 3 inserted between the long plate members 2 and 2 and bolted. The long plate material 2 forms a rectangle. The long plate member 2 is provided with a plurality of adjusting bolt holes 4 through which connection bolts 5 for connecting the strain clamp C and the short plate member 3 are inserted at substantially equal intervals in the longitudinal direction. The short plate member 3 has a rectangular shape, one end side is inserted between the long plate members 2 and 2, and the jumper socket S is connected to the other end side by a connection bolt 5. The short plate member 3 is provided with four connection bolt holes 6 through which the connection bolts 5 are inserted, corresponding to the adjustment bolt holes 4.

The connecting work of the jumper wire J using the connecting fitting 1 is carried out after the pulling clamp C is held on the armature of the steel tower and the extension and tight binding of the power transmission line W are completed. Connection fitting 1
The pulling clamps C are connected to the one end side of the long plate member 2 with the connecting bolts 5, respectively, and the jumper socket S is connected to the other end side via the short plate member 3 with the connecting bolts 5. The connection position of the short plate member 3 in the long plate member 2 is adjusted by appropriately selecting the connection bolt hole 6. The jumper socket S is a long plate material 2
It is possible to adjust the distance between the pulling clamp C and the jumper wire J and the insulator string in the longitudinal direction, and when the jumper wire J is short, the shortage of the length can be compensated.

A second embodiment is shown in FIG. The same components as those in the previous embodiment are designated by the same reference numerals, and description thereof will be omitted below. The connection fitting 7 is formed by a pair of opposing long plate members 8 and 8 which are continuously integrated at one end thereof. Also,
A rotation stopper 9 for the connection bolt 5 is provided at the edge of the adjustment bolt hole 4. The detent 9 is provided at a position opposite to the peripheral edge of the adjustment bolt hole 4 at the hexagonal bolt head 5 of the connection bolt 5.
A pair of projecting pieces whose side surfaces facing each other of a contact each other are provided. Also in this connection fitting 7, as in the case of the previous embodiment, the connecting portion C1 of the strain clamp C is connected to one end of the long plate 8 and the jumper socket S is connected to the other end of the long plate 8 via the short plate 3. The parts S1 are connected by connecting bolts 5, respectively. The connecting position of the short plate member 3 to the long plate member 8 can be changed in the longitudinal direction of the long plate member 8 by appropriately selecting the adjustment bolt hole 4. Therefore, the distance between the jumper wire J and the insulator string G can be changed, and the shortage of the jumper wire J can be compensated. When the connecting bolt 5 is tightened, co-rotation with the nut is prevented by the detent 9 so that workability is improved.

A third embodiment is shown in FIG. This connection fitting 10 is a strain clamp C for a pair of long plate members 11.
The connecting portion 11a is formed by bending laterally and then extending in the longitudinal direction. Therefore, the connecting portion C1 of the detention clamp C and the connecting portion S1 of the jumper socket S are the long plate 1
The power transmission line W and the jumper line J can be arranged on the same side with respect to the middle part of 1. This connection fitting 1
In the same manner as in the previous embodiment, the connecting portion C1 of the detention clamp C is connected to one end of the jumper socket S by the connecting bolt 5 and the connecting portion S1 of the jumper socket S is connected to the other end of the jumper socket S with the connecting bolt 5. Join. Then, the connecting position of the short plate member 3 to the long plate member 11 can be adjusted in the longitudinal direction of the long plate member 11 by appropriately selecting the connection bolt hole 4. Therefore, the distance between the jumper wire J and the insulator string G can be changed, and the shortage of the jumper wire J can be compensated.

A fourth embodiment is shown in FIG. In the long plate member 13 of the connection fitting 12, the connection portion 13a with the short clamp member 3 is different from the connection portion 13a with the strain clamp C.
The jumper wire extending in the wire extending direction is bent at an angle of about 10 ° to be continuous. In this connection fitting 12,
As in the case of the previous embodiment, the connecting position of the short plate member 3 to the long plate member 13 can be adjusted in the longitudinal direction of the long plate member 11 by appropriately selecting the connection bolt hole 4, so that the jumper wire J The distance from the insulator string G can be changed, and the shortage of the jumper wire J can be compensated. Further, comparing the connection fitting according to the first embodiment of FIG. 7 (A) with the connection fitting 12 according to the present embodiment of FIG. 7 (B), the presence of the connection fitting 12 causes a jumper for the detention clamp C. Since the extension angle of the wire J is large, the jumper wire J
In the middle of the process, the distance d2 to the base of the insulator string G can be made larger than d1, and the insulating property is improved.

All the connection fittings are made of a conductive metal plate such as aluminum. In particular, in the case of molding with an aluminum casting, a joining portion may be formed between the long plate members on the way to reinforce each other.

[0012]

As described above, according to the present invention, when the shape of the tower is changed or the building is rebuilt by raising the tower, the existing strain clamp, jumper wire, and jumper socket can be reused as they are, and the size of the jumper wire can be changed. The jumper socket connection position can be adjusted accordingly, and the distance from the tension insulator string to the jumper wire can be adjusted within the specified range.If the conventional jumper wire is insufficient in length, it can be supplemented. Therefore, it is possible to save members and reduce the construction cost of the steel tower.

[Brief description of drawings]

FIG. 1 is a front view of a jumper wire.

FIG. 2 is a plan view of a connection fitting according to the present invention.

3A is a front view of a connection fitting, and FIG. 3B is a plan view.

FIG. 4A is a front view of a connection fitting according to the second embodiment, and FIG. 4B is a plan view.

5A is a front view of a connection fitting according to a third embodiment, and FIG. 5B is a plan view.

FIG. 6A is a front view of a connection fitting according to a fourth embodiment, and FIG. 6B is a plan view.

FIG. 7 is a comparative explanatory view of a connection fitting in which a long plate member is angled.

[Explanation of symbols]

1 connection bracket 2 Long plate material 3 short plate materials 4 Adjustment bolt hole 5 connection bolt 6 Connection bolt hole 7 Connection bracket 8 Long plate material 9 rotation stop 10 connection fittings 11 Long plate material 12 Connection bracket 13 Long plate material W transmission line J jumper line C retract clamp C1 connection S jumper socket S1 connection

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kotaro Asada             25 Tohoku, Anada Nishi, Koriyama, Taihaku Ward, Sendai City, Miyagi Prefecture             Electric Power Co., Ltd. Sendai Technology Center (72) Inventor Masatsugu Okuyama             25 Tohoku, Anada Nishi, Koriyama, Taihaku Ward, Sendai City, Miyagi Prefecture             Electric Power Co., Ltd. Sendai Technology Center (72) Inventor Seizo Nomura             6-5-19 Minami-Shinagawa, Shinagawa-ku, Tokyo Sanwa             Inside Techki Co., Ltd. F term (reference) 3J039 AA07 AB02 BB01 GA02 GA04                       GA11                 5G367 EB08 JA02 JA05

Claims (5)

[Claims] 1. A connecting fitting for connecting a jumper socket for connecting a jumper wire and a retaining clamp for an overhead power transmission line, which is bolted by sandwiching a connecting portion of the retaining clamp at one end thereof. And a pair of long plate members facing each other, one end of which is inserted into a bifurcated connecting portion of the jumper socket and bolted, and the other end of which is inserted between the long plate members and bolted. The pair of long plate members have a plurality of adjustment bolt holes in the longitudinal direction through which the bolts for connecting the holding clamp and the short plate member are inserted, and the connecting portion of the holding clamp and the jumper socket. The jumper wire connection fitting is characterized in that the space between the connection part and the connection part is adjustable. 2. The jumper wire connecting fitting according to claim 1, wherein the long plate member is provided with a detent against which an outer peripheral surface of a bolt head comes into contact. 3. The connection portion of the long plate member with the retaining clamp is provided laterally offset with respect to the extension direction of the intermediate portion having the adjustment bolt hole, and the transmission line and the jumper line are the same. It arrange | positions on a plane, The jumper wire connection metal fitting of Claim 1 characterized by the above-mentioned. 4. The jumper wire connection fitting according to claim 1, wherein one ends of the pair of long plate members are continuous with each other. 5. A method of connecting a retaining clamp for retaining a transmission line and a jumper socket to connect a jumper wire interposed between overhead power transmission lines, each having a plurality of adjusting bolt holes in a longitudinal direction. The pulling clamp is connected to one end of the pair of long plate members facing each other, and the short plate members to which the jumper socket is bolted are inserted and bolted to the other end side to connect the pull clamp and the short plate member. By selecting the adjustment bolt hole that inserts the bolt for
A jumper wire connecting method, wherein a distance between the retaining clamp and the jumper socket can be adjusted.