JP4460043B2 - Optical fiber built-in insulator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a non-porcelain long-span type optical fiber built-in insulator.
[0002]
[Prior art]
Generally, in transmission lines, power stations, substations, etc., it is necessary to promptly detect the failure location caused by a lightning strike, etc., and quickly recover from the failure location. In addition, an optical sensor using the Faraday effect and Pockels effect, and an optical fiber built-in insulator that incorporates an optical fiber for transmitting the optical signal detected by the optical sensor on the high voltage side to the monitoring control system on the ground side Is used.
[0003]
Conventionally, a porcelain product has been used as such an optical fiber built-in insulator. However, it is heavy, requires labor for installation work, and the manufacturing method is complicated and expensive. For this purpose, non-ceramic (non-ceramic) optical fiber built-in insulators have been developed and used.
[0004]
As shown in FIG. 4 , the basic structure of this kind of optical fiber built-in insulator is obtained by molding an elastic insulating material such as silicone rubber on the outer periphery of a fiber reinforced resin cylinder 2 in which the optical fiber 1 is incorporated, for example. An organic insulator 3 with a shade having a large number of shades 3A at predetermined intervals in the longitudinal direction is provided on the outer circumferential surface, and the fiber reinforced resin cylinder 2 is provided on the outer circumferential surface of the rod-like fiber reinforced resin reinforcing body 4A. A fiber reinforced resin rod 4 in which the optical fiber 1 is housed is provided in the formed spiral groove 4B, and the optical fiber 1 is incorporated.
[0005]
Further, the extra length of the optical fiber 1 extending from the fiber reinforced resin cylinder 2 is formed in a loop shape on both ends of the fiber reinforced resin cylinder 2 and the organic insulator 3 with shade and accommodated in a polygonal box. Optical fiber surplus length storage cases 5 and 5 for storing the optical fiber surplus length 6 are provided. The optical fiber extra length storage cases 5 and 5 are attached to the outer periphery of both ends of the fiber reinforced resin tube 2 and fixed by bonding or tightening, and are partially embedded in both ends of the shaded organic insulator 3. It consists of a flange 7 and a cap cover 8 that is attached so as to cover the attachment flange 7.
[0006]
Reference numeral 9 denotes a bolt for tightening and fixing the cap cover 8 to the mounting flange 7. Reference numeral 10 denotes an optical fiber extra-length storage case 5 and 5 hermetically sealed so that dust, moisture, etc. enter the case 5. Packing 11 for preventing the optical fiber is attached to the side of the cap cover 8 constituting the optical fiber extra length storage case 5 and is an optical connector for transmitting and receiving optical signals. Connected to the optical fiber 1.
[0007]
[Problems to be solved by the invention]
In recent years, in order to increase the transmission efficiency and increase the transmission capacity, the working voltage of transmission and distribution lines tends to increase, and in order to increase the creepage distance of the outer surface of the optical fiber built-in insulator, the total length of the optical fiber built-in insulator Need to be long.
When the overall length of the optical fiber built-in insulator becomes longer, the overall lengths of the fiber reinforced resin cylinder 2, the shaded organic insulator 3 and the fiber reinforced resin rod 4 are inevitably longer and become a long product.
[0008]
By the way, although the long product of the fiber reinforced resin rod 4 and the organic insulator 3 with shade is relatively easy to manufacture, the long product of the fiber reinforced resin cylinder 2 is a dedicated long cylindrical core (mandrel) corresponding to the length. ) Is prepared, and glass or other reinforcing fibers are wound around the outer periphery of the long cylindrical core, and the resin must be molded, and the process of winding the reinforcing fibers takes time and effort. There is a problem that the manufacturing is not easy and the manufacturing cost of the optical fiber built-in insulator becomes high.
[0009]
In order to solve such a problem, as shown in FIG. 5 , it is also conceivable to stack and connect the optical fiber built-in insulators having the above-described structure in two or more stages. In this case, a hole 8B into which the fiber reinforced resin rod 4 is inserted is formed in the center of the bottom plate 8A of the cap cover 8 of the optical fiber surplus length storage case 5 at a location where a plurality of optical fiber built-in insulators are connected, A cylindrical boss 8C is formed so as to protrude outward from the bottom plate 8A concentrically with the hole 8B, and the end of the fiber reinforced resin cylinder 2 is inserted into the cylindrical boss 8C, and the cylindrical boss is bonded or tightened. While fixing to 8C, the front-end | tip part of the cylindrical boss | hub 8C is partially embedded in the end part of the organic insulator 3 with a shade, and a some optical fiber built-in insulator is mutually connected through the optical fiber extra length part storage case 5 It becomes a composition.
[0010]
However, the optical fiber built-in insulator having such a configuration has an optical fiber extra length storage case 5 interposed at a location where a plurality of optical fiber built-in insulators are connected to each other, and the optical fiber extra length section 6 is accommodated therein. Therefore, the insulator with built-in optical fiber is excessively bulky, and transportation, installation and the like are troublesome. Moreover, since there is an unnecessary optical fiber extra length 6, the manufacture and assembly of the optical fiber built-in insulator is complicated. Furthermore, the optical fibers 1 built in the upper and lower insulators must be connected to each other at the portion of the optical fiber extra length portion 6, and the degree of occurrence of optical fiber disconnection and optical transmission failure at the optical fiber connection portion increases. In addition, the reliability of optical signal transmission may be reduced.
[0011]
The object of the present invention is easy to manufacture, can reduce the manufacturing cost, is not bulky more than necessary, facilitates transportation, installation, etc., has few optical connection points, and is reliable in optical signal transmission. An object of the present invention is to provide an optical fiber built-in insulator that can improve the performance.
[0012]
[Means for Solving the Problems]
As a means for solving the above problems, an optical fiber built-in insulator according to claim 1 of the present invention is an optical fiber built-in insulator having a fiber reinforced resin tube and an organic insulator with a shade, in which the optical fiber is incorporated. The reinforced resin cylinder is configured by connecting a plurality of fiber reinforced resin cylinders with a connecting member, and the connecting member is fitted with the end portions of the plurality of fiber reinforced resin cylinders from both ends and is in contact with the inward annular protrusion. The fiber reinforced resin cylinder is formed of a hollow sleeve that connects the fiber reinforced resin cylinders by fixing them with each other, and the shaded organic insulator is provided at least on the outer periphery of the fiber reinforced resin cylinder alone. The optical fiber is built in,
The organic insulator with shade is provided continuously on the outer periphery of the fiber-reinforced resin cylinder of the fiber-reinforced resin cylinder and on the outer periphery of the end of the hollow sleeve, and halfway between the both ends of the hollow sleeve. It is not provided in the outer periphery of the part .
[0013]
In this way, the fiber reinforced resin cylinder is constituted by connecting a plurality of fiber reinforced resin cylinders by the connecting member, so that the fiber reinforced resin cylinder alone becomes a short product, the reinforcing fiber winding process is simplified, and the work Is reduced. Therefore, the manufacture of the fiber reinforced resin cylinder becomes easy, and the manufacturing cost of the optical fiber built-in insulator can be reduced. Also, since the fiber reinforced resin cylinder alone is connected not by the optical fiber extra length storage case but by a dedicated connection member, the shape of the connection part of the fiber reinforced resin cylinder alone is not bulky, and the optical fiber built-in insulator is transported and installed. Etc. are easy and the workability can be improved. Furthermore, since a plurality of fiber reinforced resin cylinders are not connected via the extra length of the optical fiber, the number of optical connection points is reduced, and the reliability of optical signal transmission can be improved. Further, when the connection member is constituted by a connection dedicated member such as a hollow sleeve, a plurality of fiber reinforced resin cylinders can be connected more easily and reliably to form a fiber reinforced resin cylinder. The connection structure is also more compact, and the manufacturing cost of the optical fiber built-in insulator can be further reduced.
In addition, when the shaded organic insulator is continuously provided on the outer periphery of the fiber reinforced resin cylinder of the fiber reinforced resin cylinder and the outer periphery of the end portion of the hollow sleeve, it is one type of small molding die. It becomes possible to provide a shaded organic insulator on the outer periphery of each fiber reinforced resin cylinder using a forming apparatus such as the above. In this case, the formation of the organic insulator with the shade is further simplified, the equipment cost is reduced, and the manufacturing cost of the optical fiber built-in insulator can be further reduced .
[002 0 ]
The shaded organic insulators 24, 24 are formed by molding an elastic insulating material such as silicone rubber or ethylene propylene rubber on the outer periphery of each fiber reinforced resin cylinder 26, 26 of the fiber reinforced resin cylinder 22, for example. A large number of shades 24 </ b> A are integrally formed on the surface at predetermined intervals in the longitudinal direction. In this embodiment, the shaded organic insulators 24, 24 are not provided on a part of the outer periphery of the hollow sleeve 28 which is a connecting member for connecting the fiber reinforced resin cylinders 26, 26 together.
[002 1 ]
The fiber reinforced resin cylinder 22 has one or more spiral grooves 30B formed in the outer peripheral surface of the rod-like fiber reinforced resin reinforcing body 30A into the fiber reinforced resin cylinders 26, 26 constituting the fiber reinforced resin cylinder. The optical fiber 20 is assembled by inserting the fiber reinforced resin rod 30 around which the optical fiber 20 is wound and housed. In the illustrated example, one spiral groove 30B is formed, but a plurality of spiral grooves 30B may be formed as necessary, and the optical fiber 20 may be accommodated in each spiral groove 30B.
[002 2 ]
Further, on both ends of the fiber reinforced resin cylinder 22 and the shaded organic insulators 24, 24, an extra length of the optical fiber 20 extending from the fiber reinforced resin cylinder 22 is formed in a loop shape in a polygonal box. Optical fiber surplus length storage cases 32 and 32 for storing the stored optical fiber surplus length 34 are provided. The optical fiber extra-length storage cases 32 and 32 are inserted into the outer periphery of both ends of the fiber reinforced resin tube 22 and fixed by adhesion, pressure bonding, screwing, or the like, and in the both ends of the shaded organic insulators 24 and 24. A mounting flange 36 that is partially embedded and a cap cover 38 that is mounted so as to cover the mounting flange 36 are included.
[002 3 ]
Reference numeral 40 denotes a bolt for fastening and fixing the cap cover 38 to the mounting flange 36, and 42 denotes an inside of the optical fiber extra length storage cases 32, 32 by hermetically sealing the inside of the optical fiber extra length storage cases 32, 32. A packing 44 for preventing dust, moisture, etc. from entering the optical connector 44 is an optical connector that is attached to the side of the cap cover 38 that constitutes the optical fiber extra-length storage case 32 and that transmits and receives optical signals. It is connected to the optical fiber 20 of the optical fiber extra length portion 34.
[002 4 ]
The insulator with a built-in optical fiber according to the first embodiment is configured as described above. According to such a configuration, since the fiber reinforced resin cylinder 22 is formed by connecting the short fiber reinforced resin cylinders 26 and 26, the manufacture becomes easy and the manufacturing cost of the optical fiber built-in insulator can be reduced. it can. Further, since the fiber reinforced resin cylinders 26 and 26 are connected not by the optical fiber extra length storage case 32 but by a dedicated connection member, the insulator becomes compact and convenient for its transportation and installation.
[002 5 ]
When the connecting member for connecting the plurality of fiber reinforced resin cylinders 26, 26 is constituted by the hollow sleeve 28, the plurality of fiber reinforced resin cylinders 26, 26 are more easily and reliably connected to strengthen the fiber. The resin cylinder 22 can be formed, the connection structure can be made more compact, and the manufacturing cost of the optical fiber built-in insulator can be further reduced.
[002 6 ]
When manufacturing this optical fiber built-in insulator, after fixing the mounting flange 36 which comprises the optical fiber extra length storage case 32 to the one end part of each fiber reinforced resin cylinder single-piece | unit 26, 26 previously, the said fiber reinforced resin The fiber reinforced resin cylinder 22 is formed by connecting the other ends of the cylinders 26 and 26 with a hollow sleeve 28.
[002 7 ]
Next, on the outer periphery of each fiber reinforced resin cylinder 26, 26 of the fiber reinforced resin cylinder 22 formed in this way, the shaded organic insulator 24, a part of the mounting flange 36 (cylindrical boss part), and a hollow sleeve 28 is provided by molding with a forming device such as a molding die so as to cover a part of 28.
[00 28 ]
Next, a fiber reinforced resin rod 30 in which one or a plurality of optical fibers 20 are wound and housed in a spiral groove 30B formed on the outer peripheral surface of a rod-shaped fiber reinforced resin reinforcing body 30A in the fiber reinforced resin cylinder 22. And the optical fiber 20 is assembled.
[00 29 ]
Next, the optical fiber extra length portions 34 and 34 are formed on both ends of the fiber reinforced resin cylinder 22, and the cap cover 38 is put on the mounting flange 36, so that the optical fiber extra length portions 34 and 34 are accommodated in the optical fiber extra length portion. Store in cases 32, 32.
[003 0 ]
Thus, the shaded organic insulators 24, 24 are provided only on the fiber reinforced resin cylinders 26, 26 of the fiber reinforced resin cylinder 22 as a whole, and are provided on a part of the outer periphery of the hollow sleep 28 which is a connecting member. If not, the organic insulators with caps 24 and 24 can be provided using a forming apparatus such as a single small mold. As a result, the formation of the shaded organic insulators 24 and 24 becomes simpler, the facility cost is reduced, and the manufacturing cost of the optical fiber built-in insulator can be further reduced.
[003 1 ]
In this embodiment, the fiber reinforced resin cylinder 22 is formed by connecting two short fiber reinforced resin cylinders 26, 26, but three or more fiber reinforced resin cylinders 26 are connected. You may make it form. In this case, the shaded organic insulators 24 are stacked in three or more stages.
[003 2 ]
(Second Embodiment)
FIG. 2 is a longitudinal sectional view showing a second embodiment of an optical fiber built-in insulator according to the present invention. In the insulator with built-in optical fiber of this embodiment, the organic insulator 30 with shade is continuously formed on both outer peripheries of the fiber reinforced resin cylinders 26 and 26 of the fiber reinforced resin cylinder 22 and the hollow sleeve 28 as a connecting member. Is provided. Other configurations are substantially the same as those of the first embodiment shown in FIG.
[003 3 ]
In the case of manufacturing the optical fiber built-in insulator of this embodiment, in the same manner as the case of manufacturing the optical fiber built-in insulator of the first embodiment, an optical fiber is previously attached to one end portion of each of the fiber reinforced resin cylinders 26 and 26. After fixing the attachment flange 36 constituting the surplus length storage case 32, the other ends of the fiber reinforced resin cylinders 26, 26 are connected by a hollow sleeve 28 to form the fiber reinforced resin cylinder 22.
[003 4 ]
Next, the shaded organic insulator 24 is formed on the outer periphery of each of the fiber reinforced resin cylinders 26 and 26 and the hollow sleeve 28 so as to cover part of the mounting flanges 36 and 36 (cylindrical boss portions). It is provided continuously by molding with a forming apparatus such as a mold.
[003 5 ]
Next, the fiber reinforced resin rod 30 in which the optical fiber 20 is accommodated is inserted into the fiber reinforced resin cylinder 22 to incorporate the optical fiber 20. Since the subsequent manufacturing process is substantially the same as the process of manufacturing the optical fiber built-in insulator of the first embodiment, the description thereof is omitted.
[003 6 ]
When the shaded organic insulator 24 is provided so as to cover the entire outer periphery of the fiber reinforced resin tube 22 as in the optical fiber built-in insulator of this embodiment, the creepage distance per length of the optical fiber built-in insulator is increased. Thus, the high voltage performance and reliability of the optical fiber built-in insulator can be improved, and the life can be extended.
[00 3 7]
( Third embodiment)
FIG. 3 is a longitudinal sectional view showing a third embodiment of an optical fiber built-in insulator according to the present invention. The feature of the optical fiber built-in insulator of this embodiment is that the fiber reinforced resin cylinders 22, 52 as in the first to third embodiments are configured as means for incorporating the optical fiber 20 into the fiber reinforced resin cylinders 22, 52. This means that means different from the means for inserting and incorporating the fiber reinforced resin rod 30 in which the optical fiber 20 is spirally wound and housed in the outer periphery of the fiber reinforced resin cylinders 26 and 26 is employed.
[00 3 8]
That is, in this embodiment, for example, at least one optical fiber 20 is placed in the fiber reinforced resin cylinders 26 and 26 of the fiber reinforced resin cylinder 22 in the insulator with built-in optical fiber of the second embodiment shown in FIG. The optical fiber 20 is incorporated by inserting, filling and filling an organic insulating filler material 54 such as liquid silicone rubber, epoxy resin or the like into the resin simple substance 26, 26 by pressurizing or sucking, and curing it. It is. If there is a risk of leakage of the organic insulating filler 54 filled in the fiber reinforced resin cylinder 22, the optical fibers 20 of both ends of the fiber reinforced resin cylinder 22 or the mounting flanges 36 and 36 are inserted, and It is desirable to provide a seal member (not shown) in the hole portion where the organic insulating filler 54 is injected, if necessary.
[00 3 9]
By incorporating the optical fiber 20 by such means, the movement of the optical fiber 20 can be prevented and protected, and moisture can be prevented from entering the fiber reinforced resin cylinders 22 and 52. It is possible to prevent a leakage current from flowing through the reinforced resin cylinders 22 and 52 to cause a ground fault. Incidentally, incorporation unit of such an optical fiber 20 can be applied to an optical fiber built-in insulator of the first implementation embodiment.
[00 4 0]
In each of the above embodiments, the fiber reinforced resin cylinders 26 and 26 constituting the fiber reinforced resin cylinders 22 and 52 are connected by the connection member of the hollow sleeve 28, but the invention is not limited to this .
[00 4 1]
【The invention's effect】
As described above, according to the optical fiber built-in insulator as claimed in claim 1 of the present invention, since the fiber-reinforced resin tube is configured to reset connection by the connecting member a plurality of fiber-reinforced resin tube itself, The fiber reinforced resin cylinder alone becomes a short product, and therefore, the manufacture of the fiber reinforced resin cylinder becomes easy and the manufacturing cost of the optical fiber built-in insulator can be reduced. Further, since the fiber-reinforced resin pipe itself is continued reset by a dedicated connection member is not bulky shape of the connection portion of a single fiber-reinforced resin tube, the transportation of the optical fiber built-in insulator, the easy workability installation etc. Can be improved. Furthermore, since a plurality of fiber reinforced resin cylinders are not connected via the optical fiber extra length, the number of optical connection points is reduced, and the reliability of optical signal transmission can be improved. Also, a plurality of fiber reinforced resin cylinder single-piece connecting members constituting the fiber reinforced resin cylinder are fixed with the end portions of the plurality of fiber reinforced resin cylinder single pieces inserted from both ends and in contact with the inward annular projection. Because it is composed of a connection-dedicated member called a hollow sleeve that connects fiber reinforced resin cylinders alone, a plurality of fiber reinforced resin cylinders can be more easily and reliably connected to form a fiber reinforced resin cylinder, The connection structure is also more compact, and the manufacturing cost of the optical fiber built-in insulator can be further reduced.
[00 4 2]
According to the optical fiber built-in insulator described in claim 2 of the present invention, the organic insulator with shade is provided on the outer periphery of the fiber reinforced resin cylinder alone of the fiber reinforced resin cylinder, and connects the fiber reinforced resin cylinder alone. Since it is not provided in a part of the connecting member, it is possible to provide a shaded organic insulator on the outer periphery of each fiber-reinforced resin cylinder using a forming device such as a single small molding die. This makes it easier to form the organic insulator with shade and reduces the equipment cost, thereby further reducing the production cost of the optical fiber built-in insulator.
[00 4 3]
According to the insulator with a built-in optical fiber according to claim 3 of the present invention, the organic insulator with shade is provided continuously on both outer circumferences of the fiber reinforced resin cylinder and the connection member of the fiber reinforced resin cylinder. The creepage distance per length of the fiber built-in insulator can be increased, and the high voltage performance and reliability of the optical fiber built-in insulator can be improved and the life can be extended.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention.
FIG. 2 is a longitudinal sectional view showing a second embodiment of the present invention.
FIG. 3 is a longitudinal sectional view showing a third embodiment of the present invention.
FIG. 4 is a longitudinal sectional view of a conventional optical fiber built-in insulator .
FIG. 5 is a longitudinal sectional view showing another conventional optical fiber built-in insulator .
[Explanation of symbols]
20 Optical Fiber 22 Fiber Reinforced Resin Tube 24 Organic Insulator with Shade 24A Shade 26 Fiber Reinforced Resin Tube Single 28 Hollow Sleeve 28A Inward Ring Protrusion 30 Fiber Reinforced Resin Rod 30A Fiber Reinforced Resin Reinforcing Body 30B Spiral Groove 32 Optical Fiber Extra Length Storage Case 34 Extra length of optical fiber 36 Mounting flange 38 Cap cover 40 Bolt 42 Packing 44 Optical connector 46 Connection flange 48 Screw fastening member 50 Packing 52 Fiber reinforced resin tube 54 Organic insulating filler

Claims (1)

In an optical fiber built-in insulator having a fiber reinforced resin cylinder and a shaded organic insulator in which an optical fiber is incorporated, the fiber reinforced resin cylinder is configured by connecting a plurality of fiber reinforced resin cylinders alone with a connecting member, and the connecting member The fiber reinforced resin is composed of a hollow sleeve that connects the fiber reinforced resin cylinders by inserting the ends of the fiber reinforced resin cylinders from both ends and fixing the fiber reinforced resin cylinders in contact with the inward annular projections. The shaded organic insulator is provided on the outer periphery of at least the fiber reinforced resin cylinder of the cylinder, and an optical fiber is incorporated in the fiber reinforced resin cylinder
The organic insulator with shade is provided continuously on the outer periphery of the fiber-reinforced resin cylinder of the fiber-reinforced resin cylinder and on the outer periphery of the end of the hollow sleeve, and halfway between the both ends of the hollow sleeve. An optical fiber built-in insulator which is not provided on the outer periphery of the portion .

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