JPH0344492B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a suspension support structure for a power line incorporating optical fibers for forming an optical transmission system using an overhead power line network.

[Prior art]

In recent years, optical fiber composite power lines that combine power lines and optical fibers have been developed, and it is becoming practical to form optical fiber transmission systems using overhead power line networks. If the power line is a built-in optical fiber type in which the optical fiber is passed through the power line, it is not easy to take out the optical fiber from the power line at the suspension tower section and introduce it into the tower.
That is, conventionally, in a suspension tower, as shown in FIG.
is clamped with a clamp fitting 3 having a U-shaped cross section from above the reinforcing armor rod 2 spirally wound.
Either this clamp fitting 3 is suspended and supported on the arm 4 of the steel tower with an insulator 5, or as shown in FIG. The power line is suspended and supported by an insulator on the arm 4 of the steel tower, but if the power line has a built-in optical fiber as described above, the power line with built-in optical fiber does not have an end in the suspended tower section, so It is difficult to extract the optical fiber from inside. Therefore, it is difficult to transmit information to the optical fiber transmission system at the suspension tower section.

[Purpose of the invention]

This invention was proposed based on the above background, and when forming an optical fiber transmission system using an overhead power line network,
The object of the present invention is to obtain a suspension support structure for a power line with a built-in optical fiber, which allows the optical fiber built into the power line to be easily taken into a steel tower.

[Specific structure of the invention]

The present invention connects the ends of power lines with built-in optical fibers on both sides of a support structure such as a steel tower via a retaining clamp and a mechanical force sharing member, and connects the main power lines of both power lines with built-in optical fibers electrically using jumper wires. , the mechanical force sharing member is suspended from a support structure by a suspension insulator, and an optical fiber branched from the main power line at the retaining clamp portion is guided to the support structure side through the suspension insulator. Examples of the present invention will be described below with reference to the drawings.

FIG. 3 shows a suspended support part of an overhead power line, in which a power line 11 with built-in optical fiber is cut at the position of a support structure (steel tower) 10, and a retaining clamp 12 is fixed to each cut end. The retaining clamps 12 are connected to each other via a mechanical force sharing member 13, and as described later, the left and right retaining clamps 12 are connected by jumper wires 14 to electrically connect the left and right power lines 11, and the mechanical force sharing member 13 is suspended from the arm 10a of the steel tower 10 by a suspension insulator 15. The optical fiber 11a pulled out from within the power line 11 is guided through a through hole made in the center of the suspension insulator 15, and connected to an optical fiber connection box 16 provided in the steel tower 10.

The retaining portion of the optical fiber built-in power line 11 is
As shown in FIG. 4, the end of the power line 11 is housed in the aluminum sleeve 17 of the retaining clamp 12 from one side, the steel clamp 18 is housed from the other side, and the protective pipe 11b in the center of the power line 11 is connected to the main power line. The optical fiber 11a is exposed and extended from the end of the steel clamp 18, and is housed in the hollow part 18a in the steel clamp 18. The structure is such that the aluminum sleeve 17 is compressed and firmly fixed to the irregularities 18c on the outer surface of the steel clamp 18.

As shown in FIG. 5, the mechanical force sharing member 13 has a rod-shaped portion (however, the cross section is circular, rectangular, or other arbitrary shape) 1
A protrusion 20 is integrally formed in the center of the protrusion 2.
It is a steel member with a support hole 21 drilled at 0 and connection holes 22 at both ends, and is suspended by an insulator 15 at the support hole 21 part, and the connection holes 22 at both ends and the steel clamps of the left and right retaining clamps 12. 18 connection holes 18d
are connected by a pin.

Various shapes can be considered for the mechanical force sharing member 13. For example, a steel band 23 having a support hole 21 is separately attached to the rod-shaped part 19 as shown in FIG. 6, or a substantially triangular plate as shown in FIG. shaped member 24
A support hole 19 and a connection hole 22 are drilled in the rod-shaped portion 19, with the center of the rod-shaped portion 19 flattened as shown in Fig. 8.
Various shapes can be used, such as one with a support hole 19 directly drilled in it. Furthermore, both connecting holes 18d of the left and right retaining clamps 12 are combined into one
It is also possible to pass a book pin and suspend this pin by the suspension insulator 15, in which case the pin corresponds to the mechanical force sharing member.

Furthermore, in the illustrated embodiment, the suspended insulator 15 includes:
A long-stem insulator is used in which a large number of shade parts are integrally formed on the outer periphery of a long shaft part, a through hole is made at the axis of the shaft part, and after passing the optical fiber 11a through the through hole, the optical fiber 11a is inserted into the through hole. Filled with insulation. Therefore, there is no reduction in the insulation distance due to leakage on the surface of the insulator between the high-voltage charging part and the grounding part due to the introduction of the optical fiber 11a into the steel tower 10 side, and there is no reduction in the insulation distance between the power line 11 side and the steel tower 10 side. It does not cause a decrease in dielectric strength.

〔Effect of the invention〕

As explained above, according to the present invention, even though it is a suspended steel tower, the optical fiber built into the power line can be easily incorporated into the tower.

[Brief explanation of drawings]

Fig. 1 and Fig. 2 are explanatory diagrams showing the conventional suspension support structure, Fig. 3 and the following show an embodiment of the present invention, and Fig. 3 is a side view of the vicinity of the suspension support of a steel tower. , Figure 4 is a sectional view of the retaining clamp in Figure 3, Figure 5 is an enlarged view of the mechanical force sharing member in Figure 3,
FIG. 6, FIG. 7, and FIG. 8 all show other embodiments of the mechanical force sharing member. 10... Steel tower (support structure), 10a... Arm,
DESCRIPTION OF SYMBOLS 11... Power line with built-in optical fiber, 11a... Optical fiber, 11c... Power line main line, 12... Retaining clamp, 13... Mechanical force sharing member, 14... Jumper wire, 15... Suspension insulator, 16... Fiber optic junction box.

Claims (1)

[Claims] 1 Connect the ends of the power lines 11 with built-in optical fibers on both sides of the support structure 10 via the retaining clamp 12 and the mechanical force sharing member 13, and connect the main power lines 11c of both power lines 11 with built-in optical fibers.
are electrically connected by jumper wires 14, and the mechanical force sharing member 13 is connected to the support structure 1 by a suspension insulator 15.
An optical fiber 1 is suspended from the main power line 11c at the retaining clamp 12 and branched from the main power line 11c.
1a is guided to the support structure 10 side through a suspension insulator 15.