JP3789417B2 - Wire protection device and method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an extension protection device and extension method used for newly extending, redrawing, and removing electric wires and ground wires.
[0002]
[Prior art]
Conventionally, a drawing and extending method has been employed for extending an overhead power transmission line as shown in FIGS. 17A and 17B with a part of the construction process (see, for example, Non-Patent Document 1). ).
[0003]
When the drawing and drawing method is performed in an urban area, the construction is performed according to the procedure shown in FIG.
[0004]
First, protective scaffolds 1 and 2 such as roads are installed (step 1).
When constructing the upper layer, the nylon rope is hand-drawn sequentially between the spans (step 2), and the nylon rope is replaced with a wire rope using the winch and drum 3 (hereinafter, the replacement of a single piece is pulled out). (Step 3) As shown in FIG. 17 (a), the wire drawing yoke 4 is attached to the wire rope a and replaced with the wire rope a and the three nylon ropes b1 to b3 (step 4).
[0005]
Further, the nylon ropes b1 to b3 are pulled out to the wire ropes c1 to c3, and the wire ropes c1 to c3 are pulled out to the electric wires d1 to d3 (step 5, not shown).
[0006]
When constructing the lower layer circuit, as shown in FIG. 17 (b), the extension yoke 3 is attached to the third c3 of the wire rope and replaced with the wire rope c3 and the three nylon ropes b4 to b6 ( Step 6), the nylon ropes b4 to b6 are pulled out to the wire ropes c4 to c6, and the wire ropes c4 to c6 are pulled out to the electric wires d4 to d6 (not shown) (step 7).
[0007]
As described above, the drawing and drawing method is simple, but the wire in the drawing may drop or drop on a road or a private house. It was necessary to have.
[0008]
On the other hand, for extension lines in urban areas where it is difficult to construct a protective scaffold, a hanging method as shown in part of the construction process in FIGS. (See non-patent literature, for example).
[0009]
In the case where the suspension wire method is used, when constructing the upper layer circuit, as shown in FIG. 19 (a), the suspension wheel 5 having the connection rope f connected to the uppermost support line e is movably attached. The three gold wheels 51 to 53 are suspended from the hanging wheel 5 by a cord in the vertical direction to form a set. Nylon ropes g1 to g3 are inserted through the three gold wheels 51 to 53, and this set is drawn out every 30 m in the extending direction to perform the development of the hanging wheel. On the developed suspension wheel 5a to 5c, the nylon ropes g1 to g3 of the upper layer line are pulled out to the wire ropes h1 to h3, and further, the wire ropes h1 to h3 (not shown) are pulled out to the wires i1 to i3.
[0010]
When constructing the lower layer circuit, as shown in FIG. 19 (b), after the above-described upper layer circuit is pulled out, the suspension cars 5 and 51 to 53 are simultaneously recovered, and a new suspension cable corresponding to these is collected. Cars are deployed. That is, using a wire i 1 instead of the top support line e, this mounted movably Tsukin wheel 5a that connects the connecting rope j, three gold wheel 54 to 56 to the Tsukin wheel 5a vertical Suspended with a cord in the direction to form a set. Nylon ropes g4 to g6 are inserted into the three gold wheels 54 to 56, and this set is drawn out every 30 m in the extending direction to perform the development of the hanging wheel. Put on the unrolled gold wheels 54 to 56, pull out the nylon tapes g4 to g6 of the lower layer line to the wire ropes h4 to h6 (not shown), and further connect the wire ropes h4 to h6 to the electric wires i4 to i6 (not shown). Pull out. When the extension of the electric wires was finished, the unfolded hanging wheel was recovered with a recovery device.
[0011]
In this way, the suspension metal construction method can avoid the possibility that the electric wire in the extension line hangs down or falls on a road or a private house, compared to the normal drawing and extension wire construction method, but the suspension car. The labor and construction time for deployment and recovery increased, and the cost of equipment such as gold wheels and ropes also increased.
[0012]
[Problems to be solved by the invention]
As described above, in the extension of overhead power transmission lines in urban areas, the conventional suspension method is effective in terms of safety, but the labor, construction time, and equipment cost for deploying and collecting suspension vehicles On the other hand, there was a problem that it was necessary to improve and reduce the cost.
[0013]
Therefore, the invention of the present application maintains safety equivalent to that of the conventional hanging wire method in terms of construction safety, and in terms of construction cost, the construction by construction labor, time and equipment in accordance with the conventional drawing and drawing method. The purpose is to propose an extension protection device and extension method that can reduce costs.
[0014]
[Non-Patent Document 1]
Technical Committee on Transmission Line Construction Technology, “Overview of Construction Standards for Overhead Line Construction”, Denki Shoin, February 1998, p219
[Non-Patent Document 2]
Technical Committee on Transmission Line Construction Technology, “Overview of Construction Standard for Overhead Line Construction”, Denki Shoin, February 1998, p222-224
[0015]
[Means for Solving the Problems]
In order to solve such an object, the line protection device according to claim 1 is provided with a top support line that is pulled out by a line wire when the line is extended. A protection unit formed by connecting a gold wheel to the wire and the lowermost support line and connecting the gold wheels with a protection rope group, and a connecting rope that connects the protection rope group of the protection unit at a predetermined interval to form a net characterized by comprising the group.
[0016]
As a result, it is possible to protect the crossing workpiece against drooping or dropping of the electric wire, as well as to the horizontal runout of the electric wire that could not be done with the conventional hanging method. Safety can be ensured.
[0017]
The line protection device according to claim 1, wherein the protection rope group includes at least a lateral protection rope that suppresses lateral movement of the circuit spanned at a middle part of the uppermost support line and the lowermost support line of the circuit line; It is good to have the lower side protection rope which prevents the drooping or fall of the circuit | line hung on the middle part.
[0018]
The wire drawing method according to claim 3 is formed by arranging a gold wheel on the uppermost support line spanned between the spans, the uppermost support line and the lowermost support line of the line, and connecting the gold wheels with a protective rope group. a protective unit which includes the steps of placing a rolled-ray protection device provided with a connecting rope group forming a net span connects the rope set of the protection unit at predetermined intervals, the top support lines and the line The lowermost support line is characterized by having a step of being pulled out by the wire of the line when the line is extended and a step of performing a drawing and extending method in a region surrounded by the line protection device.
[0019]
Thereby, in addition to the effect by the wire-stretching protection device according to claim 1, by using a simple drawing wire-drawing method as the wire-drawing method, the construction of the suspension car is compared with the conventional wire-drawing method. Since the labor, time and equipment can be reduced, the construction cost can be reduced.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the wire protection device and the wire construction method of the present invention will be described with reference to the drawings. First, as shown in FIG. 1, the extension protection device 8 (hereinafter referred to as a ring guard 8) according to the present invention is connected by a connecting rope (not shown) and spans between the uppermost support lines A. Horizontally in the vertical direction between the gold wheel 9 attached to the wheel and the gold wheel 10 connected to the uppermost support line B and the lowermost support line C of the line by the same connecting rope (not shown). The side protection rope 11 is connected to the bottom protection rope 12 in the bottom direction to form a U-shaped ring-shaped wire extension protection device unit 13 (hereinafter referred to as a ring guard unit 13), and the vertical side protection rope in the vertical direction. 11 is connected to the upper connecting rope D at a predetermined position x, and the lower connecting rope 12 is connected to the lower protection rope 12 in the bottom direction at the predetermined position y, and the upper connecting rope D and the lower connecting rope E are pulled together. , Make the closed accordion widen The ring guard unit 13 is obtained by expansion in the tower span.
[0021]
For example, a circle metal wheel 9 having a four-sided roller is used as a fulcrum moving metal wheel attached to the uppermost support line A, and an upper and lower two-wheel metal is used for the gold wheel attached to the uppermost support line B and the lowermost support line C of the line. A car 10 is used.
[0022]
Nylon ropes are used for the upper connecting rope D and the lower connecting rope E for moving the ring guard unit 13, and a special rope is used for the lateral protection rope 11 that constitutes the vertical direction, and the bottom direction that constitutes the bottom direction is used. A special rope is used as the side protection rope 12. As the special rope, a rope having high strength and good wear using a Kepler or the like is suitable.
[0023]
The ring guard unit 13 forms a ring guard 8 that is a bag-shaped net by connecting the upper and lower connecting ropes D and the lower connecting rope every 20 to 30 m.
[0024]
According to the ring guard 8 formed in this way, it is possible to protect the drooping or dropping of the electric wire constructed therein and the rolling of the electric wire, and to ensure the same safety as that of the conventional lifting method. . In addition, since the number of gold wheels and ropes used is less than two-thirds compared to the conventional hanging metal construction method, construction and equipment costs can be reduced.
[0025]
After the ring guard 8 is deployed, a conventional drawing and drawing method can be employed to perform construction work such as new wire drawing between steel tower diameters, replacement, or removal.
[0026]
Next, the details of the case of the newly-drawn wire of the wire drawing method of the present invention will be described.
A wire drawing method using a ring guard which is a wire protection device of the present invention (hereinafter referred to as a ring guard method) is advanced according to a construction procedure as shown in FIG. The contents of each step are as shown in FIGS.
[0027]
Each construction procedure is performed with a pair of the front line and the other line, but for the sake of convenience of drawing display and explanation, only the front line is shown in the front view, and only the front line is described. In the side view, the front line and the other line are shown as a pair.
[0028]
First, as shown in FIG. 3, in step 1, a rope is manually extended. 3A is a front view, and FIG. 3B is a side view.
Using an aerial work platform, the rope of the nylon rope F is extended while protecting a crossing object such as a private house and a road, and further replaced with a strong rope G (hereinafter referred to as pulling out). A winch and a drum 3 are installed on the ground.
[0029]
As shown in FIG. 4, in step 2, the suspension wheel is developed. 4A is a front view, and FIG. 4B is a side view.
Using the above-mentioned strong rope G as a support line, the self-propelled machine 14 deploys the X-type hanging wheel 15 at a predetermined interval. At this time, the self-propelled aircraft 14 is inserted into the connection ropes H fixed to the respective X-type suspension wheels 15 and the respective X-type suspension wheels 15 so as to be slidable with the X-type suspension wheel 15. Tow a strong rope I.
[0030]
As shown in FIG. 5, in step 3, wire drawing is performed. 5A is a front view, and FIG. 5B is a side view.
The slidable special rope I is pulled out to the wire rope J.
[0031]
As shown in FIG. 6, in step 4, ring guard expansion is performed. 6A is a front view and FIG. 6B is a side view.
The ring guard unit 13 is sent every 20 to 30 m using the wire rope J replaced in step 3 as the uppermost support line A, and the ring guard 8 is developed.
[0032]
The ring guard unit 13 includes a circle gold wheel 9 on the wire rope J of the uppermost support line A and two upper and lower wheels at the positions of the strong rope K of the uppermost support line B and the strong rope L of the lowermost support line C. A gold wheel 10 is arranged, and between these six gold wheels, except for the uppermost side, a horizontal protective rope 11 on the vertical side and a lower protective rope 12 on the lowermost side are connected to form a U-shaped ring. It has been done.
The ring guard unit 13 configured as described above is prepared in advance on the ground in about 10 sets between one diameter.
[0033]
In addition, the shape of the ring guard unit 13 is a 275 kV class because the distance between the two ground wires is wide, so a U-shape is easily drawn, but the gap between the two ground wires is narrower than the 275 kV class, The U-shaped head is narrowed.
The ring guard unit 13 has a predetermined point x (not shown) on the vertical side between the circle metal wheel 9 on the uppermost support line A and the upper and lower motorcycle wheels 10 on the uppermost support line B of the line. It is fixed to the connecting nylon rope D, and a predetermined point y (not shown) on the lower side between the gold wheels on the lowermost support line C of the line is fixed to the connecting special rope E. ing.
[0034]
As shown in FIG. 6, the X-type suspension wheel 15 at the rearmost part suspended from the wire rope J is passed through the upper connecting nylon rope D of the ring guard unit 13 and the upper and lower two-wheeled wheel 10. Special rope K, special rope M for pulling out the intermediate phase, special rope L passed through the upper and lower motorcycles, and special rope E for connecting the lower part of the above-mentioned ring guard unit. By pulling, the ring guard unit 13 is pulled out one after another, and the ring guard of the bag-like net is developed.
[0035]
As shown in FIG. 7, in step 5, the wire extension (C1) is performed. FIG. 7A is a front view, and FIG. 7B is a side view.
At this time, the line top special rope K already passed through is replaced with the wire rope K1 and pulled out to the electric wire C1.
[0036]
As shown in FIG. 8, in step 6, wire extension (C6) is performed. FIG. 8A is a front view, and FIG. 8B is a side view.
At this time, the special rope L for the lowermost part of the line that has already been passed is exchanged for the wire rope L6 and is drawn to the electric wire C6.
[0037]
As shown in FIG. 9, in step 7, a strong rope / wire is pulled out. FIG. 9A is a front view, and FIG. 9B is a side view.
First, the intermediate layer pulling special rope M pulled in step 4 is pulled out to the wire N. Next, a wire-drawing yoke is attached to the wire N, and the three wires are replaced with the three special strength ropes Ol to O3 together with the one wire N.
[0038]
Next, the wire N is rearranged to the position of the electric wire C2, and the three ropes of the special ropes O1 to O3 are rearranged to the positions of the electric wires C3 to C5, respectively.
[0039]
As shown in FIG. 10, in step 8, electric wire extension (C2) is performed. FIG. 10A is a front view, and FIG. 10B is a side view.
The electric wire C2 is connected to the wire N at the position of the electric wire C2 using the one-line quote extending yoke 16, and the electric wire C2 is extended.
[0040]
As shown in FIG. 11, in step 9, the wire ropes for the electric wires C3 to C5 are pulled out. FIG. 11A is a front view, and FIG. 11B is a side view.
Three strips of the special ropes O1 to O3 at the positions C3 to C5 are pulled out to the wire ropes P1 to P3.
[0041]
As shown in FIG. 12, in step 10, the wires C3 to C5 are extended. 12A is a front view, and FIG. 12B is a side view.
The wire ropes P1 to P3 at the positions C3 to C5 are pulled out to the electric wires C3 to C5.
[0042]
As shown in FIG. 13, in step 11, after the end of wire drawing, the strong rope is pulled out. FIG. 13A is a front view, and FIG. 13B is a side view.
The wire J of the uppermost support line A that has supported the ring guard is pulled out to the strong rope Q.
[0043]
As shown in FIG. 14, in step 12, the ring guard 8 is collected. FIG. 14A is a front view, and FIG. 14B is a side view.
By pulling the connecting rope H connecting the ring guard unit 13, the upper connecting rope D (not shown) of the ring guard unit, and the lower connecting rope E of the ring guard unit, the ring guard units are sequentially recovered. At the end of the ring guard unit, a suspension wheel 17 such as a windmill type carrier or an upper and lower two-wheeled metal wheel is disposed instead of the cycle wheel 14.
[0044]
As shown in FIG. 15, in step 13, ground wire extension is performed. FIG. 15A is a front view, and FIG. 15B is a side view.
Pull out the above-mentioned special rope Q to the ground line R.
[0045]
As shown in FIG. 16, in the last step 14, the hanging wheel is collected. At this time, the suspension wheel 16 is recovered by pulling the suspension wheel connecting rope H by the set recovery device, and a brake 18 is added to the last suspension wheel.
[0046]
As described above, the construction procedure in the case of a new extension line has been described. However, the ring guard which is the extension protection device of the present invention and the ring guard method which is the extension method can also be adopted in the case of re-stretching or removing an electric wire. Is.
[0047]
In the case of the replacement or removal of the electric wire, if there is an existing upper line, it can be used to save the trouble of drawing another.
[0048]
On the other hand, in the case of changing or removing the electric wire, if there is an existing attachment, the work of removing it in advance increases.
[0049]
The ring guard method, which is the wire drawing method of the present invention, is not necessarily limited to use in urban areas. It can also be used for continuous spans over long distances of 3 to 4 km.
[0050]
The ring guard which is the wire protection device of the present invention is a U-shaped type in which a gold wheel is attached only to the uppermost support line, the uppermost support line and the lowermost support line of the line, and the six gold wheels are connected by a rope. The ring guard unit is connected in the span direction so that all the span wires are wrapped in a bag-like net. Thereby, since the rolling, drooping, and dropping of the electric wire can be suppressed, safety at the time of newly extending, replacing, and removing the electric wire can be ensured, and the crossing workpiece can be protected.
[0051]
The ring guard method, which is the wire drawing method of the present invention, is a wire drawing method using a simple drawing method by expanding the ring guard unit and forming a ring guard between the steel tower diameters. As a result, in addition to the effects of the ring guard described above, the number of equipment such as the number of gold wheels and the number of ropes used is reduced compared to the conventional hanging metal construction method, which reduces the number of construction man-hours and shortens the construction period. Therefore, the construction cost can be reduced.
[0052]
【The invention's effect】
By using a wire protection device (ring guard) that encloses the span with a bag-shaped net, even if it is extended in an urban area, there is no need for a scaffold without sacrificing safety. The number of tools such as ropes can be reduced, labor can be reduced, and construction costs can be reduced.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram of a wire protection device of the present invention.
FIG. 2 is a flowchart of a construction procedure of a wire drawing method using the wire protection device of the present invention.
FIG. 3 is an explanatory diagram of construction procedure step 1 in the wire drawing method of the present invention.
FIG. 4 is an explanatory diagram of construction procedure step 2 in the wire drawing method of the present invention.
FIG. 5 is an explanatory diagram of construction procedure step 3 in the wire drawing method of the present invention.
FIG. 6 is an explanatory diagram of construction procedure step 4 in the wire drawing method of the present invention.
FIG. 7 is an explanatory diagram of construction procedure step 5 in the wire drawing method of the present invention.
FIG. 8 is an explanatory diagram of construction procedure step 6 in the wire drawing method of the present invention.
FIG. 9 is an explanatory diagram of construction procedure step 7 in the wire drawing method of the present invention.
FIG. 10 is an explanatory diagram of construction procedure step 8 in the wire drawing method of the present invention.
FIG. 11 is an explanatory diagram of construction procedure step 9 in the wire drawing method of the present invention.
FIG. 12 is an explanatory diagram of construction procedure step 10 in the wire drawing method of the present invention.
FIG. 13 is an explanatory diagram of a construction procedure step 11 in the wire drawing method of the present invention.
FIG. 14 is an explanatory diagram of a construction procedure step 12 in the wire drawing method of the present invention.
FIG. 15 is an explanatory diagram of a construction procedure step 13 in the wire drawing method of the present invention.
FIG. 16 is an explanatory diagram of a construction procedure step 14 in the wire drawing method of the present invention.
FIG. 17 is an explanatory diagram of a conventional drawing and drawing method. (A) is for an upper layer line, and (b) is for a lower layer line.
FIG. 18 is a flowchart of the construction procedure of the drawing and drawing method.
FIG. 19 is an explanatory diagram of a conventional hanging method. (A) is for an upper layer line, and (b) is for a lower layer line.
[Explanation of symbols]
1, 2 ... Protective scaffolding, 3 ... Winch and drum, 4 ... Extension yoke, 5, 51, 52, 53 ... Upper wire suspension wheel, 5a, 54, 55, 56・ ・ Suspension wheel of lower layer circuit, 6 ... Hanging cord, 8 ... Extension protection device (ring guard), 9 ... Circle metal wheel, 10 ... Upper and lower motorcycles, 11 ... -Side protection rope, 12 ... Lower protection rope, 13 ... Extension protection device unit (ring guard unit), 14 ... Self-propelled machine, 15 ... X-type suspension wheel, 16 .. One line quote extension yoke, 17 ... suspension wheel, 18 ... brake, a ... wire rope, b1-b6 ... nylon rope, c1-c6 ... wire rope, d1- d6 ... Electric wire, e ... Uppermost support wire, f ... Connection rope, g1-g6 ... Nylon rope, h1-h6 ..Wire rope, i1 to i6 ... electric wire, j ... connection rope, x, y ... connection rope fixing point, A ... top support line, B ... top support line of line , C ... lowermost support line of the line, D ... upper connecting rope, E ... lower connecting rope, F ... hand-drawn nylon rope, G ... drawing strength rope, H ...・ Connecting rope for X-type gold wheel, I ... X-type metal wheel insertion special rope, J ... Extracted wire rope, K ... Special rope for the top of the line, L ... For the bottom of the line Special rope, M ... Special rope for drawing the middle layer, N ... Draw wire rope, O ... Special rope for C2-C5, P ... Special rope for J extraction, Q ...・ Strong rope for uppermost support line, R ... Ground line

Claims (3)

A gold wheel is arranged on the uppermost support line and the lowermost support line of the circuit, which is pulled out by the electric wire of the line when the line is extended, and the uppermost support line spanned between the spans. A protective unit formed by connecting with
A wire protection device comprising: a connecting rope group that connects the protective rope groups of the protective unit at a predetermined interval to form a net. A lateral protection rope that suppresses lateral movement of the line spanned at least in the middle part of the uppermost support line and the lowermost support line of the line;
2. The wire extension protection device according to claim 1, further comprising a lower protection rope for preventing a line hanging or dropping from the middle portion. A protection unit formed by placing a gold wheel on the uppermost support line and the uppermost support line and the lowermost support line of the line between the spans, and connecting the gold wheels with a protective rope group; A step of disposing a wire-stretching protection device having a connecting rope group that connects a group of ropes at a predetermined interval to form a net between the diameters;
The uppermost support line and the lowermost support line of the line are drawn to the electric wire of the line when the line is extended; and
And a step of performing a drawing and drawing method in a region surrounded by the drawing protection device.

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