JPS6013228Y2 - Suspension wire of power transmission line - Google Patents

Description

[Detailed explanation of the invention] Conventionally, single strand iron wire or wire rope has been used as the power transmission line that the pantograph of a train comes into contact with, or the line that suspends the potential line, etc., but this Suspension wires such as these are subject to severe corrosion in places where the sea breeze blows, such as near the coast, in industrial areas, and in areas where there is a lot of car traffic.
The drawback is that it is not very durable, and in areas close to the coastline, it is necessary to replace it at least once every two years.

However, the suspension line in this case is different from iron wire or wire rope,
It is not corroded by acids or alkalis, has very little elongation due to automatic or high temperatures, has excellent specific tensile strength, and has a melting point of about 215°C (for polyamide cords).

Therefore, there is no need to retighten the cable.

It also has higher resistance to ultraviolet rays than conventional artificial resin cables.

Furthermore, the elongation rate is considerably lower than that of ordinary synthetic resin cables, and even if it is once elongated, it has the property of restoring itself.

Furthermore, even if the cables become thicker, the strength per unit area will not decrease as with conventional cables.

Also, since it is a complete insulator, there is no need to worry about lightning strikes.

In addition, even if the suspension line breaks due to a typhoon or the like and the person touches the transmission line, there will be no short circuit with the transmission line, and the current from the transmission line will not flow through the suspension line, so there is no risk of electric shock to anyone who touches the suspension line. .

Furthermore, when conventionally suspending a power transmission line with a suspension line, a large number of insulators are required for insulation, but by using the suspension line of the present invention, insulators can be omitted.

Next, the method of making the cables and suspension lines used in this project is explained below with reference to the drawings.

Figure 1 is a cross-sectional view of the first type of cable used in this project, and 1 is the endless artificial resin core that constitutes the cable, around which artificial resin strands 2 are wound in a spiral shape. Indicates something that is in close contact.

In this specification, endless means that there is no particular limitation on the length of filaments, twisted wires, etc., and wires of arbitrary length can be used.

The stranded wire 2 has a core 3 made of artificial resin of the quality described above, around which the filaments 4 to 11 made of artificial resin of the quality described above are wound in a helical shape and tightly attached. Synthetic resin filaments 12 to 19 are wrapped around the gaps and brought into close contact.

The direction in which the strands 2 are wound around the inner core 1 is opposite to the direction in which the strands 4 to 11 and 12 to 19 are wound around the core 3 of the strands. It's better.

Figure 2 shows that the ropes shown in Figure 1 are used, and the fibers 12 to 12 are used.
19 is split to produce a brush-like fibrous membrane.

FIG. 3 is a cross-sectional view of the second type of cable used in this proposal, in which the core wire 20 is separated from the parallel synthetic fibers 21, and around it,
Synthetic resin filaments 22.22, 22, 2 are attached to one core filament 20'' around the core filaments 20' which are arranged in parallel from the synthetic resin 21'.
2. The stranded wire 23 is wound in a helical shape, and then another stranded wire 23 is wound in a helical shape as shown in the fourth figure.

FIG. 5 is a cross-sectional view of the third type of cable used in this proposal, in which a synthetic resin filament 25 is surrounded by a man-made fiber core 24.
A stranded wire (Fig. 6) is made by winding the strands in a helical shape and tightly tying them together.This stranded wire is used as a core, and similar stranded wires are wound around the core in a helical shape and tightly attached.

An example of constructing a suspension line for suspending a power transmission line using these ropes will be explained with reference to FIGS. 8 to 10.

Reference numeral 26 denotes a gantry tower that straddles the rails, and a supporting member 28 is vertically installed on the horizontal part of the gantry tower directly above the power transmission line 27, and an upper suspension line 29 extending from the synthetic resin cable is fixed horizontally. A lower suspension line 30 made of the synthetic resin rope is fixed horizontally below the suspension line 29 via a dropper (support line), and a support metal fitting 31 is attached to the lower suspension line 30 with wires bent at equal intervals.
. . , and clamp and fix the power transmission line 27 at the lower part of the support fitting 31 in a known manner.

33 is the train body, 34 is a pantograph, and 35 is a rail.

By making the suspension wires 29 and 3G with the above-mentioned stranded wires made of artificial resin, it is possible to make a suspension wire for a power transmission line having the characteristics described above.

FIG. 7 shows an example of a method for connecting the cable 36 to another object 37 used in the present invention.

38 indicates a bonding wire.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of the artificial resin rope constituting the first type suspension line, Figure 2 is a cross-sectional view showing the state after the surface of Figure 1 has been rubbed after use, and Figure 3 is the second type of cable. Figure 4 is a cross-sectional view of the stranded wire wound around the core of the rope shown in Figure 3; A cross-sectional view of the resin cable; Figure 6 is a cross-sectional view of the stranded wire wound around the core of the cable shown in Figure 5; Figure 7 is a cross-sectional view of the artificial resin cable used in this proposal to connect it to other objects. FIG. 8 is a front view showing an example of the method, FIG. 8 is a slope view showing a situation in which a power transmission line of an electric train is suspended and supported by the hanging line of the present invention, FIG. 9 is a side view of the same, and FIG. 10 is a front view of the same.

Claims (1)

[Scope of utility model registration request] A core 1 made of one or more of polyamide such as nylon, polyethylene, polyester such as terephthalate, polyvinyl chloride, polyvinylidene chloride, polystyrene, and polypropylene is surrounded by a synthetic resin such as these. A wire (stranded wire) 2 is wound around a core 3 of the same quality in a helical manner and tightly attached to the wires 4 to 19, or a twisted wire having a structure similar to the above-mentioned stranded wire 2 is wound. A suspension line for power transmission lines that uses cables in which stranded wires with a structure similar to the stranded wires described above are tightly wound around a core wire in a spiral shape.