JP2012257373A - Attachment of loose spacer and attachment technique of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment of a loose spacer and an attachment technique of the attachment which enable a spacer to be attached with an attachment angle of a loose clamp kept constant and also enable easy attachment and detachment of the spacer.SOLUTION: An attachment of a loose spacer includes: a loose clamp end cover part 10 covering loose clamp end parts 52 holding an overhead transmission line 90 and SP lock nuts 56, 58 fixing the end parts 52; a clevis cover part 40 covering a clevis 80 attaching the loose clamp 50 holding the overhead transmission line 90 to a spacer frame body part 87 and a clevis fixing bolt 85; and a bottom lid part 20 attached to one side of a bottom of the cover part 10 with a hinge 17.

Description

  The present invention relates to a mounting bracket for mounting a spacer on an aerial transmission line composed of a plurality of transmission lines and a mounting method thereof, and more specifically, a loose spacer capable of mounting a loose spacer while keeping a mounting angle of a loose clamp constant. The present invention relates to a mounting bracket and its mounting method.

  The loose spacer is attached to the overhead power transmission line at a predetermined interval in order to suppress a vibration phenomenon called galloping that occurs in the overhead power transmission line. As for the installation work, the suspension machine is suspended in space via a roller on each of the multiple overhead transmission lines that constitute the overhead transmission line between the towers, and spacers are sequentially attached to the overhead transmission line while maintaining a predetermined interval. It is done by following.

  Conventionally, the loose clamp of the loose spacer grips the overhead power transmission line at a proper position in accordance with the display of the rotation direction. However, when the airborne machine moves from the attachment at a certain location to the next loose clamp attachment location, the electric wire is twisted by the resistance of the roller of the airborne aircraft. And the attachment process that a loose clamp is attached in a regular position in the location is repeated. FIG. 4 is a wire twist generation diagram showing the occurrence of twisting of the overhead power transmission line by the roller. In FIG. 4, when the roller 95 on the overhead power transmission line 90 rotates and advances in the direction of arrow A, the electric wire 90 is easily twisted in the direction of the stranded wire and in the direction of arrow B due to the weight of the air rider.

  In this way, when the loose clamps are sequentially attached in a state where the electric wires are continuously twisted in one direction, when all the loose spacers are installed between the steel towers, most of the loose clamps are A problem arises in that the work is completed after being attached to one side in a state of being biased to one side. Such uneven mounting of the loose spacer adversely affects the galloping vibration suppression effect.

  In order to solve this problem, there are some which fix the loose clamp with a pin. FIG. 5 is a rotation fixing structure diagram of the loose clamp that can fix the rotation of the loose clamp with a pin. FIG. 5b shows a state in which the SP lock nut 58 of the front eyebolt 53 has been loosened and the eyebolt 53 has been rotated 180 degrees downward. Thereby, the through hole 62 of the head 65 portion of the hexagon bolt appears between the both end portions 52 of the loose clamp 50. In FIG. 5 a, the loose fixing pin 70 is passed through the through hole 62 of the hexagon bolt 60. When the loose fixing pin 70 penetrates, the eyebolt 53 is returned to the original position and fixed by the SP lock nut 58.

  Both end portions 75 of the loose fixing pin 70 come into contact with both end portions 52 of the loose clamp 50, thereby preventing the loose clamp 50 from rotating due to the torsional stress of the overhead power transmission line 90. However, this method is originally intended for the use of the loose clamp 50 as a fixed clamp. Therefore, in order to use the loose clamp 50 as a torsion preventive loose clamp 50, the loose fixing pin 70 is used each time in the work process. Therefore, there is a problem in complicated workability of reattaching the eyebolt 53.

  In Patent Document 1, galloping vibration is prevented, and an ice-covered snow having a circular cross section is not developed, so that it is provided on one side of one of the symmetry axes at an even number of positions that are axisymmetric of the frame. The fixed conductor holding part holds and holds the element conductor, and the loose conductor holding part provided on the other side holds the element conductor with the loose clamp body, and this clamp body is arranged around the axis of the held element conductor. There is a description of a spacer that can be pivotably connected to a frame body at a predetermined angle.

JP-A-8-9544

  The present invention has been made in order to solve such a problem, and an object of the present invention is to provide a loose spacer mounting bracket that can be attached / detached easily while keeping a loose clamp mounting angle constant and can be easily attached / detached. The installation method is provided.

  The loose spacer mounting bracket of the present invention grips the end of the loose clamp that grips the overhead power transmission line, the loose clamp end cover that covers the SP lock nut that fixes the end, and the overhead power transmission line. The clevis for attaching the loose clamp to the spacer frame portion and the clevis cover portion for covering the clevis fixing bolt, the loose clamp end cover portion for covering the end portion of the loose clamp and the SP lock nut Loose clamp end cover gate opened to a gate shape, a bottom lid portion attached to one of the bottoms of the cover portion by a hinge, and a spring-loaded latch attached to the side bottom portion of the cover portion facing the hinge The bottom cover part has a hook that can be hooked on the end facing the hinge, and the clevis cover part covers the clevis and the clevis fixing bolt. A clevis cover gate that is open to the gate type, and a positioning support rib that positions and supports the entire cover by contacting the clevis and the clevis fixing bolt, and the loose clamp end cover portion and the clevis cover portion are The integrated connecting portion has a connecting gate similar to the clevis cover gate.

  The mounting method of the loose spacer mounting bracket of the present invention is such that the suspension machine is suspended by a plurality of overhead power transmission lines constituting the overhead power transmission line between the towers via a roller, while maintaining a predetermined interval, the overhead power transmission line In addition, when the loose spacers are sequentially attached, the loose spacer mounting brackets according to claim 1 are attached to all the loose spacers, and after the loose spacers are attached between the steel towers, the loose spacers are attached. And the step of removing all loose spacers.

  According to the present invention, it is possible to provide a loose spacer mounting bracket and a mounting method thereof that can be mounted with the loose spacer being fixed with the loose clamp mounting angle kept constant.

Configuration diagram of loose spacer mounting bracket according to the present invention Mounting diagram of the loose spacer mounting bracket of the present invention Mounting method diagram of mounting bracket for loose spacer of the present invention Electric wire twisting diagram showing the twisting of overhead power transmission lines by rollers Rotation fixing structure diagram of loose clamp that can be fixed by pin

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a loose spacer mounting bracket according to the present invention. In FIG. 1, the loose spacer mounting bracket 100 of the present invention is shown in FIG. 5 b, with an end 52 of a loose clamp that grips the overhead power transmission line 90 and SP lock nuts 56, 58 that fix the end 52. And a clevis cover 40 that covers the clevis fixing bolt 85 and a clevis 80 that attaches the loose clamp 50 that holds the overhead power transmission line 90 to the spacer frame 87. is doing.

  The loose clamp end cover portion 10 includes a loose clamp end cover gate 15 opened in a gate shape for covering the end portion 52 of the loose clamp and the SP lock nuts 56, 58, and a bottom of the cover portion 10. It has a bottom cover part 20 attached to one side by a hinge 17 and a latch 30 with a spring attached to the side bottom part of the cover part 10 facing the hinge 17, and the bottom cover part 20 has an end facing the hinge 17. A hook 25 on which a latch 30 is hung on the part is provided. Further, the spring-loaded latch 30 has a spring 35.

  The clevis cover portion 40 positions the entire cover by contacting a clevis cover gate (not shown) opened in a gate shape covering the clevis 80 and the clevis fixing bolt 85, and the clevis 80 and the clevis fixing bolt 85. And positioning support ribs 45 for supporting. The loose clamp end cover portion 10 and the clevis cover portion 40 are integrally formed, and the connection portion 47 by the integration has a connection gate (not shown) similar to the clevis cover gate.

  FIG. 2 is a mounting view of the loose spacer mounting bracket of the present invention. In FIG. 2, with the bottom cover 20 of the loose spacer mounting bracket 100 open (see FIG. 1b), the loose clamp end cover 10 is connected to the loose clamp end 52 and the SP lock nuts 56, 58. So that the clevis cover part 40 covers the clevis 80 and the clevis fixing bolt 85, each part is accommodated through the loose clamp end cover gate 15, the connection gate, and the clevis cover gate, The positioning support rib 45 is in contact with the clevis 80 and the clevis fixing bolt 85 so that the entire cover is positioned and stably supported. In this state, the bottom cover portion 20 is closed, and the mounting bracket 100 is fixed by hooking the spring-loaded latch 30 on the hook 25.

  FIG. 3 is an installation method diagram of the loose spacer mounting bracket of the present invention. In FIG. 3, as shown in FIG. 4, the mounting work is suspended in a plurality of overhead power transmission lines constituting the overhead power transmission line between the towers via a roller, and is positioned in the vicinity of the tower in FIG. 3a. A first spacer is first attached. At this time, since the first spacer is in the vicinity of the steel tower, almost no twisting stress due to the roller is generated in the overhead power transmission line 90. In this state, the mounting bracket 100 is attached to all the loose clamps 50.

  Next, the air rider moves to the position of the second spacer at a predetermined interval and attaches the second spacer shown in FIG. 3b. Similarly, the mounting bracket 100 is attached to all the loose clamps 50. In this case, in one interval between the first spacer and the second spacer, twisting stress due to the roller is generated, but not so strongly that the loose clamp 50 starts rotating around the overhead power transmission line 90. . Since the attachment fitting 100 is attached in this state, the twist within one interval is not transmitted to the electric wires of other intervals one after another.

  Next, the installation of all loose spacers between the steel towers is completed. In this case, the loose spacer keeps gripping the overhead power transmission line in a state where the proper position is matched with the display of the rotation direction. In this state, all the mounting brackets 100 mounted between the steel towers are removed. As a result, it is possible to solve the problem that the mounting is completed in a state where most of the loose clamps that have occurred between conventional steel towers are biased to one side up to the position of the rotation stopper.

  As described above, according to the present invention, it is possible to provide a loose spacer mounting bracket and a mounting method thereof which can be easily mounted and removed while keeping the mounting angle of the loose clamp constant. .

10 Loose clamp end cover section 15 Loose clamp end cover gate 17 Hinge 20 Bottom cover section 25 Hook 30 Hasp with spring 35 Spring 40 Clevis cover section 45 Positioning rib 47 Integrated connection section 50 Loose clamp 52 Loose clamp section 53 Eye bolt 55 Eye Bolt Head 56 SP Lock Nut 58 SP Lock Nut 60 Hex Bolt 62 Loose Fixing Pin Through Hole 70 Loose Fixing Pin 75 Loose Fixing Pin End 80 Clevis 85 Clevis Fixing Bolt 87 Spacer Frame Body 90 Overhead Power Transmission Line 95 Roller 100 Loose Spacer mounting bracket
A direction of travel
B Rotation direction

Claims (2)

A loose clamp end cover that covers an end of the loose clamp that holds the overhead power transmission line, and an SP lock nut that fixes the end;
A clevis that attaches the loose clamp that holds the overhead power transmission line to a spacer frame, and a clevis cover that covers a clevis fixing bolt;
The loose clamp end cover portion is formed by a loose clamp end cover gate that is open in a U-shape for covering the end portion of the loose clamp and the SP lock nut, and a hinge on one of the bottoms of the cover portion. An attached bottom lid, and a spring-loaded latch attached to the side bottom of the cover portion facing the hinge;
The bottom lid portion has a hook on which the latch is hung on an end portion facing the hinge,
The clevis cover portion positions the entire cover and supports the cover by coming into contact with the clevis cover gate that is open in a U-shape that covers the clevis and the clevis fixing bolt, and the clevis and the clevis fixing bolt. Positioning ribs,
The loose clamp end cover part and the clevis cover part are integrally formed, and the connecting part by the integration has a connection gate similar to the clevis cover gate, and the loose spacer mounting bracket . When the air hoist is suspended in a plurality of overhead power transmission lines constituting the overhead power transmission line between the towers via a roller and the loose spacers are sequentially attached to the overhead power transmission line while maintaining a predetermined interval, all The loose spacer mounting bracket of claim 1 is attached to the loose spacer.
And a step of removing all the attached loose spacers after the attachment of all the loose spacers between the steel towers is completed.

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