JPS6358010B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved overhead line construction method for power transmission lines using a so-called non-reversible hanging wheel.

The applicant previously proposed a method for extremely efficiently connecting overhead power lines under low tension using a hanging wheel as shown in FIG. (Special application 1973-
10890, Japanese Patent Publication No. 57-50402) By using a special structure for the hanging wheel, the process of reversing the hanging wheel, which was unavoidable in the conventional hanging wheel construction method, can be omitted, and it can be easily operated under low tension. This is an extremely simple and highly efficient method for extending electric wires and overhead lines, and by eliminating the need for the work of reversing the metal wheel, which is said to be a master's skill and requires a high level of skill, it is possible to improve the hanging metal method. The aim is to achieve simplification and simplification.

The non-reversible hanging wheel referred to herein basically has a configuration as shown in FIG. 1, for example. That is, there is a space 3 between the upper sheave 1 and the lower sheave 2.
This space 3 forms the striatum W ₁ or
The hanging wheel 10 is constructed by combining a plurality of unit frames (which may be two or more) each configured such that W ₂ can freely move between the sheaves 1 and 2. Next, the process of connecting electric wires using such a hanging wheel 10 will be explained with reference to FIGS. 2 to 7.

First, the main rope wire 20 for deploying metal wheels between the overhead steel towers is delivered. The wire can be replaced with lighter ones such as nylon rope in order.

FIG. 2 shows how the metal wheels 10, 10 are being deployed on the main rope wire 20, which has been handed over in this way, and 30 is a self-propelled carrier, and 40 is the metal wheels 10, 10. The spacing wire 50 that maintains the spacing is a pull rope that is extended over the lower sheave of the metal wheels 10, 10.

Specifically, the metal wheels 10, 10 are carried to each steel tower, connected by the spacing wire 40 at one of the steel towers _T1 in one span, and then connected to the main cable wire 20 as shown in FIG. Install them side by side and connect them to the opposite steel tower T ₂ using carrier 30.
Pull out the steel tower one by one toward T ₁ and
During T ₂ , deploy gold wheels 10 and 10. When the overhead wire span spans multiple spans, such metal wheel deployment is performed for each span.

Figure 3 shows the gold wheel 10, 1 between the steel towers.
0 shows the unfolded state, and the figure on the right side of FIG. 3 shows the positional relationship between the main rope wire 20 and the pull rope 50 in that case.

That is, although the sheaves themselves are omitted, there is an upper sheave of one frame of the metal wheel 10 (FIG. 1 1) on the main rope wire 20, and a lower sheave of another frame (FIG. 1 2). A pull rope 50 is extended above.

Next, the electric wire 100 is connected to one end of the pull rope 50, and as the pull rope 50 is pulled out, the electric wire 100 replaces the pull rope 50 as shown in FIG.
0 is exchanged.

The diagram on the right side of FIG. 4 shows how the main rope wire 20 is stretched to the upper sheave of one frame of the metal wheel 10, and the electric wire 100 is extended to the lower sheave of another frame as described above. It shows.

Once the electric wire 100 has been extended, tension is applied to the electric wire 100 to tension it and move it from the lower sheave to the upper sheave of the metal wheel 10, while loosening the tension on the main rope wire 20 and moving it onto the lower sheave. let This allows the electric wire 100 to fulfill the role of the main rope wire 20 up until now.
Then, the loosened main rope wire 20
Another electric wire 110 is connected to one end of the main rope wire 20, and as shown in FIG. The diagram on the right side of FIG. 5 shows the positional relationship between the electric wires 100 and 110 on the metal wheel 10.

Next, tension is applied to the electric wire 110, and the metal wheel 10
tension the upper sheave. As a result, the two extended electric wires are pulled up and nothing is left on the lower sheave of the metal wheel 10. (Figure 6 right view)
Then, using the electric wires 100, 110 as the main rope wires, pull back and remove the metal wheels 10, 10 as shown in FIG. 6, and then the electric wires 100, 110
remains, so the overhead line is completed by tightening it and securing it to the insulators.

However, in the above-mentioned overhead line method, the metal wheel must be carried to the tower for each span, and the metal wheel must be mounted on each tower, and the metal wheel must be deployed for each span, which makes handling extremely complicated. Moreover, there are problems in terms of labor, safety, and time consumption. Furthermore, depending on the steel tower, it may be difficult to carry in and install the metal wheel as described above.

Therefore, instead of deploying the metal wheel for each span as described above, it is now possible to deploy the metal wheel over multiple spans at once from the drum station towards the engine station, as in the case of normal line extension work. This will result in an extremely efficient overhead line.

The present invention has been made in view of these circumstances, and its gist is to extend the first main rope wire and the first pull rope over multiple spans of the multiple steel towers to be connected, and to 1. The main rope wire is supported by the support of the steel tower so that the unfolding roller of the hanging fitting described later can pass therethrough, and on the other hand, one end of the line extension section has sheaves above and below, and a space is formed between the sheaves. A plurality of unit frames configured such that the filament can be moved between them are combined, a plurality of hanging wheels are prepared to which deploying rollers are appropriately attached, and these hanging wheels are connected by a connecting rope. Connecting the tip to the first pull rope,
The second main rope wire and the second pull rope are extended on the lower sheave of the hanging car, and the spreading roller of the hanging car is made to run on the first main rope wire, so that the hanging car is moved. is deployed once over multiple spans, and after the deployment is completed, the extended second main rope wire is tensioned and transferred to the upper sheave, and an electric wire is connected to the end of the second pull rope.
This is replaced with an electric wire, and then the replaced electric wire is tensioned and transferred to the upper sheave, while the tension on the second main rope wire is loosened and transferred to the lower sheave, and another electric wire is attached to the end of the second main rope wire. This method involves connecting overhead power lines, replacing them with electric wires, hoisting up the replaced wires, and recovering the hanging wheel.

The following is a sequential explanation based on examples.

FIG. 8 is a front view showing an example of the hanging wheel 10 used in the overhead wire construction method according to the present invention.

Although the shape has changed slightly, the first
Items that are the same as those shown in the figure indicate the same configuration. The difference from FIG. 1 is that there is a developing roller 4 attached to a support shaft 5 at the upper center of the metal wheel 10.

Thus, the unfolding roller 4 can smoothly run on the first main rope wire 60 (described later) supported by a hook-shaped support 210 on the arm 200 of the steel tower, and can pass through this support 210. There is. Tip 5a of the support shaft 5 that supports the unfolding roller 4
As shown in FIG. 8, it is preferable to form the roller so as to extend slightly beyond the spreading roller 4, and to act as a stopper to prevent the spreading roller 4 from slipping off.

In the present invention, as shown in FIG. 9, wire rolling wheels 11, 11 and 12, 12 are attached to steel towers A, B, and C (which may be three or more) spanning multiple spans, and a drum field D The first main rope wire 60 and the first pull rope 70 are delivered between the engine station and the engine station E.

After the first main rope wire 60 has been extended, the main rope wire 60 is placed on a hook-shaped support 210, as shown in FIG. fixed in the state. For this fixing method, an appropriate method such as clamping with a split clamp may be used.

On the other hand, the hanging wheels 10, 10, which are deployed over the plurality of spans, are carried into the drum field D. Unlike the conventional example, a hanging wheel is not carried in for each tower span.

The gold wheels 10, 10 brought into the drum field D are the first
As shown in FIG.
, and its tip is connected to the first pulling rope 70 that has already been extended. In this state, gold wheel 1
The spreading rollers 4 of 0 and 10 run on the first main rope wire 60, and the second main rope wire 60' and the second
The pull rope 80 is extended, and the metal wheels 10, 10 are sequentially taken over by the first pull rope 70 and deployed on the first main rope wire 60. 1st pull rope 7
Gold wheel 12,1 used when extending 0 for the first time
2 may be removed one by one as the metal wheels 10, 10 are unfolded.

FIG. 11 shows the metal wheels 10 and 1 extending over multiple spans from the drum field D to the engine field E as described above.
This shows how 0's are expanded continuously at once.

After this deployment is completed, the spacing wires 40 of the metal wheels 10, 10 are fixed to the steel tower, and tension is applied to the second main rope wire 60' extended above the lower sheaves 2, 2, and the upper sheave 1 is ,Put it up on the 1st side.

FIG. 12 shows the second main rope wire 6
This shows the state where tension is applied to 0'. The second main rope wire 60' moves to the upper sheave 1, 1, and due to its tension, the unfolding rollers 4, 4, which were previously on the first main rope wire 60, are moved upward from the first main rope wire 60. be lifted up. That is, gold wheel 10,
10 is supported by the second main rope wire 60'.
Since the second pull rope 80 is still on the lower sheaves 2, 2, connect an electric wire (not particularly shown) to one end of the second pull rope 80, and replace the second pull rope 80 with an electric wire in the same manner as in FIG. . Thereafter, tension is applied to the replaced electric wire according to the same procedure as in FIGS. 5 and 6, the second main rope wire 60' is loosened, another electric wire is connected to one end of the loosened second main rope wire 60', and the second main rope wire 60' is connected to one end of the loosened second main rope wire 60'. The second main rope wire 60' is replaced with another electric wire. Next, tension is applied to other electric wires to raise them up, and the metal wheels 10, 10 are recovered using these stretched electric wires in place of the main rope wire.

Since the first main rope wire 60 cannot be used to collect the gold wheels 10, 10, they must be collected at each steel tower, but in this case, the metal wheels 10, 10 are simply lowered from the tower, so each tower There is no problem in doing so. Of course, if the structure is such that the unfolding roller 4 of the metal wheel 10 does not come off the first main rope wire 60, it is also possible to return the metal wheels 10, 10 to the initial drum field D and collect them.

Although not particularly shown in the above, it would be possible to pull out the take-up rope for collecting the metal wheel 10 when it is deployed (instead of on the lower sheave). Preferably, a retaining hole is provided adjacent to the spacing wire so that the spacing wire can be held in alignment with the spacing wire.
The gold wheel can be easily collected by pulling the collection rope at the time of collection. A pipe of a predetermined length may be fitted into the take-up rope holding hole to prevent the metal wheels from coming into direct contact with each other.

After collecting the gold wheel, finally the first main rope wire 6
0 will remain, but if this first main rope wire is moved to the top of the tower and used as a pull wire for extending the ground wire, it can be effectively utilized.

As described in detail above, according to the overhead wire method according to the present invention, it is possible to continuously deploy the metal wheels for the non-reversible hanging method over a desired plurality of spans at once, and also to This allows wire extension to be carried out without any problems, and not only has it become possible to further expand the scope of application of the non-inverted hanging metal construction method, but it also eliminates the need for transporting metal wheels to each tower and the work required to do so. This is of great significance, as it has enabled us to significantly reduce work time and greatly improve safety, and the effects it will have on the industry are immeasurable.

[Brief explanation of drawings]

Figure 1 is a front view showing an example of a non-reversible hanging wheel;
2 to 7 are explanatory diagrams showing a method for connecting electric wires using such a hanging wheel, and FIG. 8 is a front view showing an example of a hanging wheel used in the overhead line method according to the present invention.
9 to 12 are explanatory diagrams showing the overhead wire method according to the present invention. 1: Upper sheave, 2: Lower sheave, 3: Space,
4: Deployment roller, 10: Hanging wheel, 20: Main cable wire, 30: Carrier, 40: Spacing wire, 6
0: first main rope wire, 60': second main rope wire,
70: First pull rope, 80: Second pull rope.

Claims (1)

[Claims] 1 The first
The main rope wire and the first pull rope are extended, and the first main rope wire is supported on the support of the steel tower so that the deploying roller of the hanging wheel, which will be described later, can pass therethrough, while on one end side of the extended wire section, A hanger in which a plurality of unit frames are combined, each having sheaves on the upper and lower sides, and a space is formed between the sheaves so that the filament can move between the sheaves, and an appropriate unfolding roller is attached to the unit frames. A plurality of cars are prepared, these hanging cars are connected by a connecting rope, the tip of which is connected to the first pulling rope, and a second main rope wire and a second pulling rope are placed on the lower sheave of the hanging car. While extending the wire, the spreading roller of the hanging wheel is made to travel on the first main rope wire, so that the hanging wheel is continuously deployed over multiple spans at once, and the wire is extended after the deployment is completed. The second main rope wire that has been pulled up is tensioned and transferred to the upper sheave, an electric wire is connected to the end of the second main rope, and this is replaced with an electric wire.Then, the replaced electric wire is pulled up and transferred to the upper sheave, and the second main rope wire is pulled up and transferred to the upper sheave. Loosen the tension on the second main rope wire, move it to the lower sheave, connect another electric wire to the end of the second main rope wire, replace it with an electric wire, tension the replaced electric wire, and recover the hanging wheel. Overhead transmission line method.