JPS6366125B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for efficiently connecting a multi-conductor power transmission line using a hanging wheel.

In recent years, as overhead power transmission lines have become larger in size, conventional overhead wire methods have resulted in excessive wire tension, causing various problems, so overhead wires using the so-called sling method have been attracting attention.

The applicant has already filed a patent application in 1983 regarding the revolutionary non-reversible hanging method that improved this method.
108970, and furthermore, a patent application was filed in 1983 to apply this hanging method to multi-conductor power transmission lines.
20161 was proposed. The present invention aims to provide a method for more efficiently overhead multi-conductor power transmission lines using this non-reversible hanging wheel.

For example, a non-reversible hanging wheel is shown in Figure 1 or Figure 2.
It consists of the configuration shown in the figure. In other words, there is no obstacle between the upper sheaves 3 and 6 as shown by the dotted lines in Figure 1 (or Figure 2).
(or 3', 6') and the lower sheaves 4, 5 (or 4', 5').
The unit frames 1 and 2 (W ₁ , W ₂ in the figure) are spaces in which they can move freely (this is not limited to a pair as shown in the figure, the number can also be increased, and their arrangement is not limited to a simple parallel arrangement. (V-shaped, Y-shaped, etc. can be modified as necessary).

In FIG. 1, reference numeral 7 denotes a locking portion of the spacing wire, and 8 and 8' denote hinges, on which a door for taking in and out the filament is attached so as to be openable and closable. Reference numerals 9 and 9' refer to operating rods that are biased to engage with the engaging pieces 12 and 12' by springs 10 and 10' and stoppers 11 and 11', and are biased in the opposite direction to the springs 10 and 10'. As a result, it is disengaged from the engaging pieces 12, 12', and the door can be opened and closed. In FIG. 2, these opening/closing devices are omitted.

Next, a case in which a four-conductor power transmission line is connected using these non-reversible hanging wheels will be described in detail with reference to FIG. 3 and subsequent figures.

First, the main cable wire 20 for deploying metal wheels between the overhead steel towers is delivered.

The main rope wire 20 is delivered in advance by a separate helicopter wire extension or the like.

Figure 3 shows the main rope wire 2 delivered in this way.
0, and at the same time pull the wire 40 onto the lower sheave of the hanging wheels 30, 30...
This shows how the line is being extended.

Hanging wheels 30, 30... are space maintaining wires 31, 3
For example, the main rope wire ₂₀ is connected to the upper sheave of one frame of a hanging wheel as illustrated in FIG. While the pull wire 40 is placed on the 4' side _W1 , it is gradually unfolded as shown in FIG. 3, and is moved on the main rope wire 20 in the direction of the arrow by the carrier 32.

FIG. 4 shows a state in which the pull wire 40 is thus extended onto the main rope wire 20 via the hanging wheels 30, 30, . . . . The figure on the right side of Figure 4 is the gold wheel 3.
2 is a schematic diagram illustrating the arrangement relationship between the main rope wire 20 and the pull wire 40 in 0.

Next, an electric wire 50 is connected to the end of the pull wire 40, and the pull wire 40 is replaced with the electric wire 50 as shown in FIG.

The diagram on the right side of FIG. 5 shows the hanging wheel 30
It shows how the main rope wire 20 and the electric wire 50 are arranged inside.

Next, from the state shown in FIG. 5, the electric wires 50 are temporarily fastened and the tension on the main rope wire 20 is loosened. Then, as shown by the dotted line in FIG. 2, the electric wire 50 moves to the upper sheave 3' side, and the main rope wire 20 moves to the lower sheave 5' side, so that the electric wire 50 acts as the main rope wire. It will take the form of

In this state, next, as shown in FIG. 6, another electric wire 50' is connected to the end of the main cable wire 20.
Replace it with the main rope wire 20.

In this state, the electric wires 50, 50' are arranged on the hanging wheel 30 as shown in the right side view of FIG.

Next, the electric wire 50' side is also temporarily raised and moved to the upper sheave side. If you do this, the hanging wheel 30
Inside, the electric wire 50 is connected as shown on the right side of Figure 7.
and 50' will all be transferred to the upper sheave.

In this state, the distance maintaining wire 31 is pulled in the direction of the arrow in FIG. 7 using the electric wires 50, 50' as guide wires, and the hanging wheels 30, 30 are recovered once and for all. Since the recovered hanging wheels 30, 30 are deployed again as described below, it is desirable to connect the hanging wheel pull-out rope 31' to the last hanging wheel 30 when recovering.

When all the hanging wheels 30, 30 are collected, next, while extending new pull wires 60, 60' onto the required lower sheaves of the hanging wheels as shown in FIG. ' is again used as a guide line, and the hanging wheels 30, 30 are pulled out and deployed again using, for example, the rope 31' for pulling out the hanging wheels. This unfolded state is as shown in FIG. 4 above. The only difference is that the two electric wires 50, 50' serve as the main cable wires, and the two extended wires 60, 60' serve as the main rope wires.
Note that extending the pull wire over the required lower sheave means, for example, in the case of 6 conductors, 4 unit frames are used, 4 wires are stretched, and then 2 wires are stretched.
This is because there are cases where a strip of pull wire is extended.

Next, the electric wires 50'' and 50 are connected to the ends of the drawn wires 60 and 60', and the drawn wires 60 and 60' are connected to each other.
0,60' are replaced with new wires 50'', 50. FIG. 9 shows the situation.

Next, in the state shown in Fig. 9, the electric wires 50'', 5
Apply tension to 0, as shown in Figure 10,
The electric wires 50'', 50 are suspended between the upper sheave and the lower sheave (without being pulled up to the upper sheave).Then, the electric wires 50'', 50 leave the lower sheave, so the hanging wheels 30, 30 As a result, the state is the same as that shown in FIG. 7, and the electric wires 50, 5
The hanging wheel can be recovered using 0' as a guide line.
Therefore, as in FIG. 7, all of the hanging wheels 30, 30 are recovered by removing the spacing wire 31.
Remove from the wire.

Then, as shown in Figure 11, a four-conductor wire 5 is created.
0, 50', 50'', and 50 remain as overhead wires. By appropriately tightening these and attaching spacers, the four-conductor transmission line is completed.

A feature of the present invention is that a four-conductor overhead wire can be created even though there are two unit frames.

Therefore, even if there are 6 conductors, 8 conductors, or 10 conductors, the overhead wire can be constructed using a hanging wheel that has a number of unit frames not less than the number of conductors, and the hanging wheel can be made larger. It was possible to provide an epoch-making construction method that allowed the construction of overhead lines to be completed with the minimum required structure without any additional construction, and its significance is enormous.

[Brief explanation of drawings]

FIGS. 1 and 2 are explanatory diagrams of a non-reversible hanging wheel used in the present invention, and FIGS. 3 to 11 are explanatory diagrams showing implementation states of the overhead wire method according to the present invention. 20: Main rope wire, 30: Hanging wheel, 31: Spacing wire, 40, 60, 60': Pull wire,
50, 50', 50'', 50: Electric wire.

Claims (1)

[Claims] 1. Prepare a hanging wheel made by combining a plurality of unit frames that have an upper sheave and a lower sheave and provide a space in which the filament can move freely between the sheaves, and connect the hanging wheel with a spacing wire. The pull wire is extended onto the lower sheave of another frame through which the main rope wire is not inserted, and then the electric wire is connected to the end of the pull wire. By replacing the wire with an electric wire, the electric wire is extended onto the lower sheave, tension is applied to the extended electric wire, the electric wire is temporarily raised to the upper sheave side, the tension on the main rope wire is loosened, and the wire is lowered. over the side sheave, then replace the main rope wire with a separate wire by connecting a separate wire to the end of the main rope wire, and temporarily raise the separate wire onto the upper sheave, and Using the removed electric wire as a guide wire, the hanging wheel is recovered, and while a new pull wire is extended over the required lower sheave of the recovered hanging wheel, the hanging wheel is moved using the electric wire as a guide wire. is expanded again, a new electric wire is connected to the end of the new extended pull wire, the new electric wire is replaced with a new electric wire, and then tension is applied to the new electric wire, and the lower sheave is A method for constructing a multi-conductor power transmission line using a hanging wheel, characterized in that the hanging wheel is temporarily raised in a suspended state between the upper sheave and the hanging wheel, and the lifting wheel is recovered in that state.