JP3802776B2 - Optical fiber built-in insulator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in an optical fiber built-in insulator that is used in a transmission / distribution electric wire, a power generation facility, a substation facility, or the like and incorporates an optical fiber that transmits various information of a high voltage section to the ground as an optical signal.
[0002]
[Prior art]
Generally, in transmission / distribution lines, power generation facilities, substation facilities, etc., measurement, monitoring protection, and control systems are often provided in order to prevent ground faults and short circuits. As a system 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 that incorporates an optical fiber is used for transmission to the device on the side.
[0003]
As illustrated in FIG. 3, the conventional optical fiber built-in insulator 10 includes an insulator body 12 and connecting fittings 14 provided at both ends of the insulator body 12. In FIG. 3, 28 is a cap, 30 is a box-shaped mounting bracket fitted into the insulator body 12, 32 is a cover flange mounted so as to be covered with the mounting bracket 30, and 34 is connected to the optical fiber 16 to the outside. The adapter flange 36 is a storage case for storing the extra length optical fiber 16 protruding from the insulator body 12, 38 is an extra length storage section in which the storage case 36 is disposed, and 40 is an adapter.
[0004]
The insulator main body 12 includes an organic insulator 18 in which an optical fiber 16 is incorporated at the center, and a pleated tube 20 provided on the outer periphery of the organic insulator 18.
[0005]
The organic insulator 18 is composed of an optical fiber rod 22 and a fiber reinforced resin cylinder 24 that covers the optical fiber rod 22. An insulating resin 26 is filled between the optical fiber rod 22 and the fiber reinforced insulating cylinder 24 in order to improve electrical insulation. As this insulating resin 26, for example, a silicone resin or the like can be used.
[0006]
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 the fiber reinforced resin rod 22A. Thus, since the optical fiber 16 is accommodated 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 them, the insulating resin 26 is used. It is less affected by shrinkage that occurs during curing. In addition, even after curing, the influence of expansion and contraction of the insulating resin 26 accompanying the temperature change can be suppressed as much as possible, and the tensile and bending stress applied to the optical fiber 16 can be relaxed.
[0007]
[Problems to be solved by the invention]
However, when the fiber reinforced resin rod 22A is thin, it is difficult to cut the spiral groove 22B in the above-described optical fiber built-in insulator 10, and when the spiral groove 22B is cut, the strength of the fiber reinforced resin rod 22A decreases. There was a problem to do.
In addition, when the optical fiber 16 standardized to a certain length with optical connectors attached to both ends is used, the length accommodated in the spiral groove 22B of the optical fiber 16 is constant. The length of the portion (the extra length portion) where the movement of the end of the portion becomes free is also constant. For this purpose, optical connectors are attached to both ends, and various optical fibers 16 formed to have a certain length must be prepared for each fiber reinforced resin rod 22A having different lengths, which is very troublesome. There was a problem.
[0008]
[Means for Solving the Problems]
The present invention has been made to solve the above-mentioned problems, and in an optical fiber built-in insulator having an organic insulator in which an optical fiber is incorporated at the center, the organic insulator is a fiber whose outer peripheral surface has no groove. Rutotomoni optical fiber wound around the outer peripheral surface of the reinforced resin rod, and the optical fiber rods made fixed in dots with adhesive the optical fiber to a desired position of the fiber-reinforced resin rod, covered on the optical fiber rod It is characterized by comprising a fiber-reinforced resin cylinder.
[0009]
According to the present invention, the optical fiber rod Rutotomoni optical fiber wound around the outer peripheral surface of the fiber reinforced resin rod groove on the outer peripheral surface is not cut, the optical fiber in a desired position of the fiber-reinforced resin rod Since it is fixed in a dotted shape with an adhesive, it is not necessary to cut a groove in the fiber reinforced resin rod as in the prior art, so it is easy to form an optical fiber rod, and the strength of the fiber reinforced resin rod is reduced. There is nothing.
Further, according to the present invention, the optical fiber is wound around the outer peripheral surface of the fiber reinforced resin rod uncut groove on the outer peripheral surface Rutotomoni, the optical fiber with an adhesive in a desired position of the fiber-reinforced resin rod Since it is fixed in a dot shape, even when using a standardized optical fiber with a fixed length attached to both ends, the length of the extra length can be adjusted by changing the winding pitch. Therefore, it is not necessary to prepare an optical fiber having a fixed length by attaching an optical connector to both ends of each fiber-reinforced resin rod having a different length.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view of an embodiment of an optical fiber built-in insulator according to the present invention. In FIG. 1, the same parts as those described with reference to FIG.
[0011]
The insulator 10 with a built-in optical fiber according to the present embodiment includes an insulator body 12 and connecting fittings 14 provided at both ends of the insulator body 12.
The insulator main body 12 includes an organic insulator 18 in which an optical fiber 16 is incorporated, and a pleated tube 20 provided on the outer periphery of the organic insulator 18.
The organic insulator 18 includes an optical fiber rod 1 and a fiber reinforced resin cylinder 24 covered with the optical fiber rod 1. An insulating resin 26 is filled between the optical fiber rod 1 and the fiber reinforced resin cylinder 24.
[0012]
As shown in FIG. 2, this embodiment is different from the conventional example in that an optical fiber rod 1 is wound around an outer peripheral surface of a fiber reinforced resin rod 2 whose grooves are not cut on the outer peripheral surface. At the same time, the optical fiber 16 is formed by being fixed in a dot-like manner at a desired position of the fiber reinforced resin rod 2 (hereinafter also referred to as a fixing point 3).
[0013]
As shown in FIG. 1, the connection fitting 14 includes a box-shaped attachment fitting 30 fitted into the insulator body 12, a cover flange 32 attached so as to cover the attachment fitting 30, and the attachment fitting 30. It consists of an adapter flange 34 for connecting the optical fiber 16 attached to the side surface to the outside.
[0014]
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, and light is transmitted there. As compared with the case where the fiber 16 is accommodated, the optical fiber rod 1 can be easily manufactured.
Moreover, since the groove | channel is not formed in the fiber reinforced resin rod 2, the intensity | strength of the fiber reinforced resin rod 2 does not fall.
[0015]
Furthermore, when using the optical fiber 16 with the optical connector 4 attached to both ends, the optical fiber 16 is wound around the fiber reinforced resin rod 2 even if the optical fiber 16 is standardized to a certain length. By changing the pitch and fixing the optical fiber 16 at the fixing point 3, the length of the extra length portion at the end of the optical fiber 16 can be set to a desired length. Therefore, the extra length portion of the optical fiber 16 is adjusted to an appropriate length, accommodated in the extra length accommodating portion 38, and the optical fiber 16 is held by the optical fiber holding member 5 or the fastener 6 while the connector 4 is held. The terminal processing work connected to the adapter 40 on the other side is facilitated.
[0016]
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 shape. However, the optical fiber 16 is fixed over the entire length of the portion in contact with the outer peripheral surface of the fiber reinforced resin rod 2. May be.
[0017]
【The invention's effect】
According to the present invention described above, the optical fiber rod Rutotomoni optical fiber wound around the outer peripheral surface of the fiber reinforced resin rod groove on the outer peripheral surface is not cut, the optical fiber wherein the fiber-reinforced resin rod It is easy to form an optical fiber rod because there is no need to cut a groove in the fiber reinforced resin rod as in the prior art because it is fixed in a dot shape with an adhesive at a desired position of the fiber reinforced resin rod. There is an excellent effect that the strength of the material does not decrease. In addition, since the length of the extra length can be adjusted by changing the winding pitch of the optical fiber, an optical connector is attached to both ends of each fiber reinforced resin rod having a different length so that the length is constant. There is also an effect that it is not necessary to prepare 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 an optical fiber rod used in the embodiment.
FIG. 3 is a longitudinal sectional view of a conventional insulator with a 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 metal fitting 16 Optical fiber 18 Organic insulator 20 Tube with folds 24 Fiber reinforced resin cylinder 26 Insulating resin 28 Cap 30 Mounting bracket 32 Cover flange 34 Adapter flange 36 Storage case 38 Extra length storage section 40 Adapter

Claims (1)

In the optical fiber built-in insulator having an organic insulator optical fiber embedded in the center, the organic insulator, the optical fiber wound around the outer peripheral surface of the fiber reinforced resin rod uncut groove on the outer peripheral surface Rutotomoni, An optical fiber comprising: an optical fiber rod in which the optical fiber is fixed to a desired position of the fiber reinforced resin rod in a dot shape with an adhesive; and a fiber reinforced resin tube placed on the optical fiber rod. Insulator with built-in fiber.

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