JPS61210809A - Lower construction protection for power transmission areal line work - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION In overhead power transmission line work, the present invention is designed to prevent abnormalities in the wires due to unforeseen circumstances during the overhead line work, when multiple electric wires are installed across the sky between adjacent towers. This relates to a method for preventing contact with structures below, side accidents, or damage to electric wires due to drooping. In addition, this method makes it easy to construct protective columnar scaffolds in view of the topographical environment, and allows for self-immersion between them. 1 B. 1 person - Traditionally, methods have been adopted to protect lower structures during overhead line work, such as constructing protective scaffolding on both sides near the structure and constructing a net of wire rope between them. However, in this conventional method, the protective device is made of conductive material, so
If the lower structure is electrical equipment, a long-term power outage is required to install the protective device, and sufficient measures are also required for contact between the protective device itself and the lower structure, and contact accidents are more likely to occur due to metal Because of the wire rope, the impact on workers and the public is severe, not only due to the power outage on the lower power line.

The present invention belongs to the same type of construction of protective scaffolding as described above, but eliminates the use of metal wire ropes and uses a plurality of electrically insulating busbar ropes between the protective scaffoldings on both sides and a plurality of electrically insulating busbar ropes connecting them laterally. This is a method of constructing a hammock-like protection device consisting of electrically insulating horizontal protection ropes, thereby protecting the underlying structure. In this way, by making all parts of the hammock-shaped protective device from electrically insulating materials, the above-mentioned disadvantages of conventional protective devices made from metal materials are overcome, and at the same time, electrically insulating materials are generally lighter than metals, so they can be protected. This has the advantage of making the installation work of the device easier.

If the lower structure is close to one of the steel towers, this steel tower may also be used as a protective scaffolding on one side, and only the protective scaffolding on the other side may be constructed.

The present invention furthermore provides that, in order to facilitate the work of constructing the hammock-like protective device, and to ensure the mechanical safety of the device during strong winds after the construction, the protective rope is connected to the busbar rope via a roller. They are connected in a movable relationship in the longitudinal direction of the line, and in order to operate this movement, an auxiliary rope of electrical insulation is attached along the bus rope, and this is connected in a fixed relationship with the supporting frame of the roller. It is.

To explain one embodiment of the present invention with reference to the drawings, in Fig. 1, A and B are two adjacent steel towers, between which the power transmission line 4 to be installed from now on is partially installed. Indicated by status. There is an electric wire 7 stretched between both utility poles 5 and 6 below the power transmission line 4 as an existing lower structure, and this electric wire 7 crosses the power transmission line 4 orthogonally or obliquely at a position close to one of the towers. are doing. The protection device according to the present invention is stretched along the power transmission line 4 between the power transmission line 4 and the existing electric wire 7 below the power transmission line.

A protective horizontal arm 9, which is slightly longer than the lowermost arm 8 of the three horizontal arms (upper and lower) that supports the three-phase, three-wire, two-circuit power transmission line of the tower A, is fixedly installed on the tower A. On the other hand, a protective steel tower scaffolding 1 is installed on the opposite side of the tower, sandwiching the lower structure 7.
0 is constructed, and a protective horizontal arm 11 of the same length as arm 9 is fixedly installed at its upper end. Both horizontal arms 9 and 1
1 are installed in directions facing each other, and four busbar ropes 12 are stretched in parallel with each other at appropriate intervals between them. Horizontal protection rope 1 that connects these busbar ropes horizontally
3 are installed at appropriate intervals along the length direction of each bus rope 120, and these multiple bus ropes 1
2 and the plurality of protective ropes 13.
4 is provided. The rollers housed in each roller tool 14 are connected to each bus rope.The frame supporting the rollers is the protective rope 1.
3 in a locking relationship. Further, an auxiliary rope 15 is provided along each generatrix rope 12 so as to be movable therewith in the longitudinal direction, and this rope is also coupled to the roller support frame at a corresponding position in a locking relationship. Although omitted from the drawing, the auxiliary rope 1
5 has a length that is more than twice the distance between the steel tower A and the protective steel tower scaffolding 10, one half of which is shown in the drawing, and both ends of this half have completed the erection operation. Immediately before, it is fixed to horizontal arms 9 and 11 on both sides as shown.

FIG. 2 shows the securing relationship between the four parallel busbar openings in FIG. 1, and FIG. 3 shows a similar securing relationship regarding the two inner busbar ropes 12. In both figures, the roller device 14 contains several horizontal rollers 16 and vertical rollers 17, each of which rolls in contact with the generatrix rope 12 passing through its central hole; [711]
2 yen is supported by the opener I R1/fflr. Although the detailed structure of the frame 18 is omitted in the drawings, it is constructed such that a vertical Mcz-217 can rotate around its upper end on either side of the frame to open the enclosure of the central hole.

Therefore, the bus rope 12 can be inserted into and removed from the central hole of the roller frame 1B by opening and closing one of its enclosures. A hanger 19 is fixedly installed to protrude from the lower surface of the frame 18, and corresponding portions of the horizontal protection rope 13 and the auxiliary rope 15 are locked in three holes of the hanger 19 via rings.

In FIG. 2, the end of only one protective rope 13 is locked in one hole of the hanging tool 19, and in FIG. They are respectively locked in the holes.

Bus rope 12, horizontal protection rope 13 and auxiliary rope 1
5 are all made of electrically insulating materials and are therefore generally lighter in weight than metals. Further, it is desirable that these ropes have as high mechanical strength, durability, weather resistance, etc. as possible in view of the usage mode of the present invention. An example of a rope using a material that satisfies these conditions is the so-called Kepler rope, which uses a special high-strength organic fiber. In addition to having aetheric insulation properties, this wire rope has approximately the same mechanical breaking strength as conventional wire ropes of approximately the same diameter, and its weight is less than V3.

To explain the order of construction work for the protection device according to the present invention shown in FIG.
Also, after each horizontal arm 11 is attached to the protective steel tower scaffolding 10 constructed in advance, an auxiliary rope 15 of four IC strips is extended between these horizontal arms 9 and 11. To do this, a nylon or Kepler rope for wire extension is extended from a helicopter or the like between horizontal arms 9 and 11, and each tip of four auxiliary ropes 15 prepared in advance on the side of tower A is tied to the wire extension rope. After that, the four auxiliary ropes 15 are stretched and installed between the horizontal arms 9 and 11 by winding up this rope for wire extension on the scaffold 10 side. Each auxiliary rope 15 is attached to the steel tower A
and the scaffold 10, so when the tip of the auxiliary rope 15 reaches the horizontal arm 11, the end of the first half of the auxiliary rope 15 is on the horizontal arm 9, and the second half follows it. . Therefore, each starting point of the four bus ropes 12 is tied to the vicinity of each starting point in the latter half on the tower A side, and each auxiliary rope 15 is then pulled and wound onto a reel on the scaffold 10 side. The starting end reaches the horizontal arm 11 and the ending end reaches the horizontal arm 9.

Therefore, by tightening each bus rope rope 12 and fixing its starting and ending ends to the horizontal arms 11 and 9, respectively, these ropes will be in the state shown in FIG. It is wound up on a reel, and the rear half of the cable is in a state where it roughly follows each busbar rope 12.

Next, on the scaffolding 10 side, work begins to install the horizontal protection ropes 13 that connect the busbar ropes 12 laterally. Therefore, first, the starting end (lower right end in FIG. 1) of each bus rope 12 is
The roller tool 14 as shown in FIG. 2 or 133 is
The two ends of each section of the protective rope 13 are engaged with each other by opening and closing the front surface, and both ends of each section of the protective rope 13 are locked via carabiners 20 to the holes of the hanging tool 19 protruding from the lower surface thereof. Further, a corresponding portion of the auxiliary rope 15 extending along the busbar rope 12&'C is locked into another hole of the hanging tool 19 via a carabiner 20. Thus, by pulling the auxiliary rope 15 on the side of the steel tower A, the roller tool 14 is smoothly moved by rolling the roller 16° 17a' on the busbar rope 12 together with the protective rope 13 stretched laterally. Therefore, each auxiliary rope 15 is wound on the steel tower A side, and each auxiliary rope 15 is sent out on the scaffold 10 side, and the first protective rope 13 (1) is passed along the busbar rope 12 to the scaffold
Move from the side towards the tower person. When the distance of this move reaches the scheduled secretary, stop the move and move to the next protective rope (
2) Perform the same operation as above for VC. That is, each second roller tool 14 is engaged with each busbar rope 12 and the hanging tool 19 is
Each end of the three protective rope sections and the corresponding portion of each auxiliary rope 15 are laterally locked in the hole, and then each auxiliary rope is moved toward the tower man by a predetermined distance. Thereafter, similar operations are repeated, and the series of operations ends when the required number of protection ropes II is finally sent out from the horizontal arm 11 on the scaffolding 10 side. Each protective rope 13 at the end of this
(1).

(2) and (n) are shown in Figure 1 (1) and (2) respectively.
, (n). Then each auxiliary rope 1
5 is strung between the tower man and the scaffolding 100, and its both ends are fixed to the horizontal arms 9 and 11, to complete the hammock-shaped protection device as shown.

Describing the procedure for recovering the protective ropes 13 as a countermeasure in times of strong winds, etc., first release the fixation of each auxiliary rope 15 to the horizontal arms 9, 11, and then remove each auxiliary rope that was wound onto the tower A side. By letting out half of the rope and winding it up on the scaffolding 10 side, the protective rope 13'? : Move to scaffold 10 side. Therefore, first, when the protective rope 13G) reaches the horizontal arm 11, the roller device 14 associated with it
from the bus rope 12 and remove the auxiliary rope 1 from the hanging device 19.
5 and recover these roller tools 14 and the protective rope 13 attached to them. Next, the auxiliary rope 15
is further pulled toward the horizontal arm 11 by a predetermined distance, and when the next protective rope 13 reaches the horizontal arm 11, perform the same operation as above to remove this protective rope 13 and the related roller tool 14'll. Collect sushi. Thereafter, similar operations are repeated to complete the collection of the last protective rope 13(1) and related roller tool 14.

As an emergency measure, when reaching the horizontal arm 11 in the above, only the auxiliary ropes 15 and the hanging tools 19 are sequentially unlocked, and all the protective ropes 13 are bundled [Arm 1
You can also bind it to 1.

During the above recovery operation, the last protective rope 13 (1)
0, this rope and the horizontal arm 9
In order to prevent this, roller tools 14 are inserted into the bus rope 12 at appropriate intervals for the auxiliary ropes 12 and 12 to auxiliary ropes. By locking the corresponding part of the rope, the drooping of the auxiliary rope can be restricted.

Describing the procedure for removing the above-mentioned protection devices after the overhead wiring work of all the electric lines between adjacent towers A and B is completed, first, all the protection ropes 13 and related roller devices are removed in accordance with the procedure described above as a countermeasure against strong winds. 14, each auxiliary rope 15 is tightened between the tower man and the scaffolding 10, each bus rope 12 is released from the fixed line, and the auxiliary rope 15 is connected to another roller device 14 that is locked to the auxiliary rope 15. Then, the bus roller 12 is pulled in the direction of the steel tower A to be wound up and recovered. Next, to collect the remaining auxiliary rope, use the tower A and scaffolding 10.
Release the tension fixing between the two, connect the extension rope to the auxiliary rope on the pylon entry side, and wind up and collect the auxiliary rope on the scaffold 1G side. Finally, the wire extension rope is wound up and collected on the ground, and the horizontal arm 9 and protective scaffolding 10 are removed to complete the removal work.

According to the present invention, during overhead wiring work involving multiple electric wires between adjacent steel towers, damage to the underlying structure due to abnormal drooping of electric wires during overhead wiring work is prevented by using an electrically insulating hammock-like protection device, and In addition to the effect of being able to avoid electrical troubles, the assembly work of the protective device can be simplified by providing an auxiliary rope and a roller tool that are movable in the line length direction in relation to the busbar rope. In addition, the horizontal protection rope can be easily recovered in order to avoid damage to the protection device during strong winds.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of a protection device according to the present invention. 2 and fJ&3 are respective perspective views of the partial elements used in two places in FIG. 1. A, B: Adjacent steel tower 4: Multi-strand electric wire 7: Lower structure 9.11: Horizontal arm L2: Bus bar lobe
13: Horizontal protection rope 14: Roller tool
15: Auxiliary rope 16, 17: Roller
18: Roller Frame Agent Patent Attorney Misao Kamiyama + f Diagram A + 2 Diagram Procedure Amendment (Method) July 22, 1985

Claims (1)

[Claims] When installing multiple electric wires across the sky above a structure between adjacent steel towers, a protective horizontal arm is attached to each columnar body constructed on both sides of the structure, sandwiching the structure in the direction along the multiple electric wires. are installed facing each other, and a plurality of electrically insulating busbar ropes are installed between these horizontal arms at appropriate intervals so as to be interposed between the multi-strand electric wire and the structure below it. and, along each of these bus ropes, an electrically insulating auxiliary rope having a length more than twice the distance between the two horizontal arms is provided in a movable relationship in the line length direction with respect to each corresponding bus rope, Each bus rope is provided with a plurality of roller tools having built-in rollers that roll in contact with the bus rope along the length of each bus rope, and these roller tools are placed at positions that maintain an appropriate distance from each other. and lock the frame body to the corresponding position part of either half of each corresponding auxiliary rope,
A plurality of electrically insulating horizontal protection ropes are locked to each of the roller frames at the intersection position with each busbar rope along the line length direction of each busbar rope that horizontally connects the plurality of busbar ropes, Thus, by fixing both ends of the half portions of each auxiliary rope to both horizontal arms, a hammock-like protection device consisting of a plurality of bus ropes and a plurality of horizontal protection ropes is used to protect the upper multi-strand electric wire from the lower one. A method for protecting lower structures during power transmission line installation work that prevents contact with structures.