JP2002334621A - Insulator incorporating optical fiber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insulator incorporating optical fiber of which an optical fiber rod with optical fiber wound around a fiber reinforced resin rod is easily formed and the fiber reinforced resin rod has enough strength. SOLUTION: With the insulator 10 incorporating optical fiber having an organic insulating body 18 with optical fiber 16 incorporated at the center, the organic insulator 18 consists of an optical fiber rod 1 made with the optical fiber 16 wound around an outer periphery face of the fiber reinforced resin rod 2 and fixed at points, and a fiber reinforced resin cylinder 24 covered over the optical fiber rod 1, between which, insulating resin 26 is filled in.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber built-in insulator which is used in transmission / distribution lines or power generation facilities, substation facilities, etc., and incorporates an optical fiber for transmitting various information of a high voltage section to the ground as an optical signal. It is about improvement.

[0002]

2. Description of the Related Art In general, in transmission and distribution lines, power generation facilities, substation facilities, and the like, measurement,
Monitoring and control systems are often provided. As systems for such measurement, monitoring, and control, optical sensors and optical transmission devices are used, focusing on the high electrical insulation and electromagnetic noise resistance of optical fibers, and the optical signals are grounded from the high-voltage section. An optical fiber built-in insulator having a built-in optical fiber is used for transmission to a device on the side.

As shown in FIG. 3, a conventional optical fiber built-in insulator 10 comprises an insulator main body 12 and connection fittings 14 provided at both ends of the insulator main body 12. In addition, in FIG. 3, 28 is a cap, 30 is the insulator main body 1
2 is a box-shaped mounting bracket, 32 is a cover flange mounted so as to cover the mounting bracket 30, 34 is an adapter flange for connecting the optical fiber 16 to the outside, and 36 protrudes from the insulator body 12. A storage case for storing the optical fiber 16 having an extra length, 38 is an extra storage portion in which the storage case 36 is disposed, and 40 is an adapter.

The insulator main body 12 has an optical fiber 1 at its center.
And an organic insulator 18 incorporating the organic insulator 1.
8 and a fluted tube 20 provided on the outer periphery of the tube 8.

The organic insulator 18 comprises an optical fiber rod 22
And a fiber reinforced resin tube 24 covered by the optical fiber rod 22. This optical fiber rod 22
Insulating resin 26 is filled between the fiber and the fiber-reinforced insulating cylinder 24 in order to improve the electrical insulation. This insulating resin 2
As 6, for example, a silicone resin or the like can be used.

As shown in FIG. 4, the optical fiber rod 22 is formed by housing the optical fiber 16 in a spiral groove 22B provided on the outer peripheral surface of a fiber reinforced resin rod 22A. As described above, since the optical fiber 16 is housed in the spiral groove 22B, when the optical fiber rod 22 is stored in the fiber reinforced resin cylinder 24 and the insulating resin 26 is filled between the two, the insulating resin 26 is used. Is hardly affected by shrinkage generated during curing. In addition, even after curing, the influence of the expansion and contraction of the insulating resin 26 due to the temperature change can be suppressed as much as possible, and the tensile and bending stress applied to the optical fiber 16 can be reduced.

[0007]

However, the above optical fiber built-in insulator 10 has a fiber reinforced resin rod 22.
If A is thin, it is difficult to cut the spiral groove 22B, and if the spiral groove 22B is cut, the fiber reinforced resin rod 22A
However, there was a problem that the strength of the resin was reduced. Further, when the optical fiber 16 standardized to a fixed length having optical connectors attached to both ends is used, the length of the optical fiber 16 accommodated in the spiral groove 22B is constant. The length of the portion (extra length portion) where the movement of the end portion becomes free is also constant. For this purpose, optical connectors are attached to both ends, and various types of optical fibers 16 having a fixed length must be prepared for each fiber-reinforced resin rod 22A having a different length, which is very troublesome. There was a problem.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an optical fiber built-in insulator having an organic insulator in which an optical fiber is incorporated at the center is provided.
The organic insulator, an optical fiber rod formed by winding an optical fiber around the outer peripheral surface of the fiber-reinforced resin rod, and
The optical fiber rod comprises a fiber reinforced resin cylinder covered by an optical fiber rod, and the space between the optical fiber rod and the fiber reinforced resin cylinder is filled with an insulating resin.

According to the present invention, since the optical fiber rod has the optical fiber wound and fixed on the outer peripheral surface of the fiber reinforced resin rod, there is no need to cut a groove in the fiber reinforced resin rod as in the prior art. The formation of the fiber rod is easy, and the strength of the fiber reinforced resin rod does not decrease. Further, according to the present invention, since the optical fiber is wound and fixed on the outer peripheral surface of the fiber-reinforced resin rod,
Even when using a standardized optical fiber with a fixed length with connectors attached to both ends, the length of the extra length can be adjusted by changing the winding pitch, so fiber reinforced fibers with different lengths can be adjusted. Optical connectors are attached to both ends of each resin rod, so that it is not necessary to manufacture an optical fiber having a predetermined length.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view of one embodiment of an insulator with a built-in optical fiber according to the present invention. FIG.
, The same parts as those described with reference to FIG. 3 are indicated by the same reference numerals.

The optical fiber built-in insulator 10 according to the present embodiment comprises:
It comprises an insulator main body 12 and connection fittings 14 provided at both ends of the insulator main body 12. The insulator main body 12 includes an organic insulator 18 in which the optical fiber 16 is incorporated, and a fluted tube 20 provided on the outer periphery of the organic insulator 18. The organic insulator 18 includes the optical fiber rod 1 and a fiber reinforced resin tube 24 coated on the optical fiber rod 1. An insulating resin 26 is filled between the optical fiber rod 1 and the fiber reinforced resin tube 24.

This embodiment is different from the conventional example in that, as shown in FIG. 2, an optical fiber rod 1 is provided on an outer peripheral surface of a fiber reinforced resin rod 2 whose outer peripheral surface is not grooved. 16 is wound and fixed to the fixing point 3 at a desired position of the fiber reinforced resin rod 2 in a dot-like manner (for example, with an adhesive).

As shown in FIG. 1, the connection fitting 14 includes a box-shaped mounting fitting 30 fitted into the insulator main body 12,
It comprises a cover flange 32 attached so as to cover the mounting bracket 30 and an adapter flange 34 for connecting the optical fiber 16 mounted on the side surface of the mounting bracket 30 to the outside.

As described above, since the optical fiber 16 is formed by being fixed to the fixing point 3 of the fiber-reinforced resin rod 2, a spiral groove is formed in the fiber-reinforced resin rod 2 as in the prior art. The production of the optical fiber rod 1 is easier than in the case where the optical fiber 16 is stored therein. Further, since no groove is formed in the fiber reinforced resin rod 2, the strength of the fiber reinforced resin rod 2 does not decrease.

Further, when the optical fiber 16 having the optical connectors 4 attached to both ends is used, the fiber reinforced resin rod 2 of the optical fiber 16 can be used even if the optical fiber 16 is standardized to a certain length. Change the winding pitch to
By fixing the optical fiber 16 at the fixing point 3, the length of the extra length at the end of the optical fiber 16 can be set to a desired length. Therefore, the extra length of the optical fiber 16 is adjusted to an appropriate length, the extra length is stored in the extra length storage section 38, and the connector 4 is held while the optical fiber 16 is held by the optical fiber holding member 5 and the fastener 6. The work of the terminal processing for connecting to the adapter 40 of the other party is facilitated.

In the above embodiment, the optical fiber 16 is fixed to the outer peripheral surface of the fiber reinforced resin rod 2 in a dot-like manner. You may make it.

[0017]

As described above, according to the present invention, since the optical fiber rod is wound around the outer peripheral surface of the fiber reinforced resin rod at a desired position in a fixed manner in a dot-like manner, Since there is no need to cut a groove in the fiber-reinforced resin rod, there is an excellent effect that the formation of the optical fiber rod is easy and the strength of the fiber-reinforced resin rod does not decrease. Also, by changing the winding pitch of the optical fiber, the length of the extra length can be adjusted, so that an optical connector is attached to each end of each fiber-reinforced resin rod having a different length, so that the length can be fixed. There is also an effect that it is not necessary to manufacture the formed optical fiber.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of an optical fiber built-in insulator according to the present invention.

FIG. 2 is a side view of the optical fiber rod used in the embodiment.

FIG. 3 is a longitudinal sectional view of a conventional insulator with built-in optical fiber.

FIG. 4 is a side view of an optical fiber rod used in the conventional optical fiber built-in insulator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optical fiber rod 2 Fiber reinforced resin rod 3 Fixing point 4 Connector 5 Optical fiber holding member 6 Fastener 10 Optical fiber built-in insulator 12 Insulator main body 14 Connection bracket 16 Optical fiber 18 Organic insulator 20 Folded tube 24 Fiber reinforced resin cylinder 26 Insulating resin 28 Cap 30 Mounting bracket 32 Cover flange 34 Adapter flange 36 Storage case 38 Extra storage section 40 Adapter

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 2G015 AA27 BA02 BA10 CA00 2G033 AA01 AB00 AC00 AD00 AD18 AG12 AG13 AG15 2H038 CA66 5G331 AA00 BB01 BB31 CA04 CA06 DA01 EB19

Claims (1)

[Claims] 1. An optical fiber built-in insulator having an organic insulator in which an optical fiber is incorporated at the center, wherein the organic insulator is an optical fiber rod formed by winding an optical fiber around an outer peripheral surface of a fiber reinforced resin rod. An optical fiber built-in insulator, comprising: a fiber reinforced resin cylinder covered by the optical fiber rod, wherein an insulating resin is filled between the optical fiber rod and the fiber reinforced resin cylinder.