JP2002095118A - Replacement method of line hardware of tension insulator device of extra-high voltage cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method by which a line hardware can be replaced easily while a tension insulator device is stretched on the ground. SOLUTION: An entire expansion/contraction device 31 is installed across cables 66 and tower part 65 between which a tension insulator device 11 is provided. A partial expansion/contraction device for a rear part, for a rear part of a lead, or for a front part of the lead is installed across rear parts of insulator connection elements 12 and the tower parts 65 between which a line hardware connection elements 14 of the rear part of the tension insulator device 11 are provided, across the lead part of line hardware connection elements 15 of the lead part and the lead parts of the insulator connection elements 12 between which the rear parts of the line hardware connection elements 15 are provided, or across the lead part of the entire expansion/ contraction device 31 and the rear parts of the line hardware connection elements 15 between which the front parts of the line hardware connections elements 15 are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension insulator for an ultra-high voltage electric wire (transmission line).
Clevis links, links, wire attachments, tower attachments, bolts and nuts, etc.).

[0002]

2. Description of the Related Art Among insulators of tension insulators, a pair of split cylinders to be fitted to the projections of a cap (metal portion) of an insulator before and after a replacement insulator, since the acting tension is relatively small. An insulator replacement device consisting of an insulator gripper (split cylindrical type) and a turnbuckle that extends and contracts between them, relaxes the tension of the replacement insulator portion, and replaces the desired insulator. ing.

[0003] On the other hand, with respect to the overhead wire fittings, since the generation of defects such as rust has not yet been recognized, it is in the stage of being studied. However, to date, the tensile strength has been reduced due to the magnitude of the acting tension. A very large and costly method of lowering the entire device on the ground and replacing it is being considered.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for easily replacing an overhead wire fitting with a tension insulator installed on the ground.

[0005]

According to the replacement method of the present invention, an entire telescopic device (temporary wire storage device) is provided between a portion (an electric wire portion and a steel tower portion) sandwiching a tension insulator before and after (front and rear). At the same time as passing over, between the part (the rear part of the insulator connected body and the steel tower part) that sandwiches the wire connecting part at the rear of the tension insulator device, or the rear part of the wire fitting connected part at the front part of the tensile insulator device Between the sandwiched portion (the front part of the wire connecting member at the front end of the tension insulator device and the front portion of the insulator connecting member) or the front portion (the front portion) of the wire wire connecting member at the front portion of the tension insulating device. Between the front and rear parts (between the electric wire or the front part of the entire telescopic device and the rear part of the connecting wire bracket at the front part of the tension insulator), for the rear part, for the rear part of the front part, or for the front part of the front part A tension insulator with a whole telescopic device Relaxation of the tension of the entire installation, and the back or front of the rear or front part of the connecting wire bracket of the tension insulator by the partial expansion and contraction device for the rear part, the rear part of the front part, or the front part of the front part Under such circumstances, the overhead wire fittings are individually removed and attached.

[0006] In the method of the present invention, the whole and partial expansion and contraction device is generally provided with a turnbuckle, a chain block, a hydraulic cylinder between a front fitting and a rear fitting (intermediate part). A device equipped with a manual telescopic device (equipment) such as a hydraulic cylinder operated telescopic link mechanism can be used.

The front fitting of the entire telescopic device is constituted by a wedge-shaped electric wire gripper (cam-along), and the front fitting of the rear partial telescopic device and the rear mounting of the partial telescopic device for the rear part of the front part. The tool can be constituted by a split-tube-type insulator gripper forming the above-mentioned insulator changer.

Further, the front end of the partial telescopic device for the front part of the front portion is usually attached to the front end of the entire telescopic device, particularly to a connecting member (yoke, etc.) adjacent to the front mounting device of the whole telescopic device. be able to.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a four-conductor tension insulator (a steel tower mounted one-point support system).

The exemplified tension insulator device 11 includes a steel tower 65.
And a pair of left and right insulator connectors 12 connecting a plurality of insulators 13 and extending between four upper and lower, left and right electric wires 66.
In the rear part, as the main overhead wire fittings, one each of the tension device mounting brackets 16, a horizontal double yoke 17, and a pair of right and left right-angle clevis links 18 are sequentially provided from the tower 55 side.
And a wire connecting member 14 including a ball clevis 19 and a plurality of bolts and nuts (not shown).
As the main overhead wire fittings, sequentially from the insulator connector 11 side,
Left and right parallel socket link 20 and right angle clevis 2
1. One horizontal double yoke 22 and one right-angle clevis 2
3 and a vertical double yoke 24, a pair of upper and lower right-angle clevis 25 and a horizontal double yoke 26, a pair of right and left right-angle clevis 27 in upper and lower sides, a single link 28, a wedge-shaped tension clamp 29, and a bolt and nut ( (Not shown).

In order to replace the overhead wire fittings of the tension insulator 11 as described above, first, the entire telescopic device 31 as schematically shown in FIGS. 1 and 2 is bridged between the electric wire 66 and the steel tower 65. .

The overall telescopic device 31 has a vertical double yoke 32 connected to a steel tower via a U clevis 33 as a rear mounting tool at a rear end portion, and a pair of upper right and left electric wires 66 and a lower portion at a front end portion. And a pair of left and right wedge-shaped electric wire grippers (cam-alongs) as tip attachments connected to each of the pair of left and right electric wires 66 and a horizontal double yoke 34. A pair of upper and lower turnbuckles 36 and a wire rope 37 are provided between a pair of double yokes 34, and the wires are taken in by a contraction operation of the upper and lower turnbuckles 36 by a handle (not shown). The tension insulator device 11
Release the overall tension to a suitable value.

Next, when replacing the overhead wire fittings constituting the overhead wire connecting member 14 at the rear of the tension insulator device 11,
As schematically shown in FIG. 3, a split tube type insulator gripping tool 43 as a front fitting to be fitted to a cap of the insulator 13 of the insulator connector 12 and a steel tower as a rear fitting are provided at a front end and a rear end. Protective woven fabric attachment (wrapping)
Belt 42 and handle 4 between them
Partial telescoping device 41 for the rear with a chain block 46 with a woven cloth and a protective belt 45
To the middle insulator 1 at the rear of the left and right insulator connectors 12.
The left and right chain fittings 14 can be individually exchanged by the contraction operation of the left and right chain blocks 44 by the handles 45 so that the wire fittings can be individually replaced. loosen.

In order to replace the rear wire fitting in the front wire connecting member 15 of the tension insulator device 11, as shown in FIGS. 4 and 5, a front mounting portion is attached to the front end portion and the rear end portion. A pair of upper and lower yoke mounting links 53 as tools and one split cylindrical insulator gripper 52 as a rear mounting tool, and a pair of upper and lower turnbuckles 54 and right angle clevis 55 Two sets of left and right partial extension devices 51 are passed between the insulator 13 at the distal end of each of the left and right insulator connectors 12 and the horizontal double yoke 26 constituting the front end of the overhead wire connector 15. . Then, by a contraction operation of the turn buckle 54 via each handle (not shown), the overhead wire connecting member 15 is loosened so that the overhead wire fitting can be replaced.

Further, when replacing the leading wire fitting in the leading wire connecting member 15 of the tension insulator device 11, as shown in FIG. 6 and FIG. A partial telescopic device 56 for a front part having a pair of left and right vertical twin yokes 57 corresponding to the electric wires 66 and a pair of right and left chain blocks 60 connected to the respective double yokes 57 is used as a whole telescopic device. Between the pair of horizontal double yokes 34 above and below 31 and the horizontal double yoke 22 at the rear of the overhead wire connecting member 15, via U clevises 58, 59 as front and rear attachments. By the contraction operation of the chain block 60 via each handle 61, the front part of the front end of the overhead wire connecting member 15 is loosened until the overhead wire can be replaced.

The method of the present invention can be implemented in various other forms, such as using link bars (rods) instead of or in addition to wire ropes instead of the chain block or turnbuckle in the entire or partial telescopic device. It can be implemented and is not limited to the above embodiment.

[0017]

As is apparent from the above description, according to the method of the present invention, the replacement of the wire fittings of the tension insulator device is performed while the tension insulator device is installed on the ground, and Since the replacement is performed using the entire and partial expansion and contraction device having a simple structure, the replacement cost is low, the amount of replacement work is small, the replacement is safe, and the burden on the operator is light.

In addition, according to this method, the electric wires need to be taken in minimally, so that no imbalance occurs in the tower.

[Brief description of the drawings]

FIG. 1 is a plan view schematically showing a use state of an entire telescopic device in an embodiment of a method of the present invention.

FIG. 2 is a side view corresponding to FIG.

FIG. 3 is a plan view schematically showing a use state of the rear stretching device for the rear part in the embodiment of the method of the present invention.

FIG. 4 is a plan view schematically showing a use state of a partial expansion and contraction device for a rear part of a front part in an embodiment of the method of the present invention.

FIG. 5 is a side view corresponding to FIG.

FIG. 6 is a plan view schematically showing a state of use of a partial expansion and contraction device for a front part of a front part in an embodiment of the method of the present invention.

FIG. 7 is a side view corresponding to FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Tensile insulator device 12 Insulator connection body 13 Insulator 14 Rear overhead wire connection body 15 Front overhead wire connection body 31 Overall expansion / contraction device 34 Double yoke 35 Wedge-shaped electric wire gripper 36 Turnbuckle 37 Wire rope 41 Rear Partial telescopic device 43 Split cylindrical insulator gripper 44 Chain block 51 Partial telescopic device for rear part of front end 52 Split cylindrical insulator gripper 54 Turnbuckle 56 Partial telescopic device for front front part 60 Chain block 65 Steel tower part 66 electric wire

Claims (6)

[Claims] The present invention relates to a tension insulator device, wherein the entire telescopic device is bridged between the front and rear portions of the tension insulator device. For the rear or front part, between the parts that sandwich the front part of the overhead wire connecting body at the front or the front part of the overhead wire connecting body at the front of the tension insulator device. For the front or back of the front or front part of the front part of the back or front part of the front or front part of the front part. A cable for an insulator for an ultra-high-voltage electric wire insulator, characterized in that the cable fittings are individually removed and attached under the relaxed state of the rear or front part of the connected part of the cable fitting of the tension insulator device. How to replace the bracket. 2. The method of claim 1, wherein the full and partial telescopic device comprises a manual telescopic device between the front and rear mountings. 3. The method according to claim 2, wherein the tip fitting of the overall telescopic device is a wedge-shaped wire gripper. 4. The method according to claim 2, wherein the front attachment of the rear extension device for the rear part is a split-tube type insulator gripper. 5. The method according to claim 2, wherein the rear attachment of the partial extension device for the rear part of the front part is a split-tube type insulator gripper. 6. The front end of a partial telescopic device for a front part of a front part,
The method according to any one of claims 2 to 5, wherein the method is attached to a connection tool adjacent to a front attachment device of the total expansion device.