JP4071319B2 - Salt insulation cover for composite insulators for distribution lines - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a composite insulator for a distribution line, and more particularly to a saltproof cover for preventing leakage current due to adhesion of salt water.
[0002]
[Prior art]
In recent years, for example, in the insulator of a power transmission line, instead of a ceramic insulator, a resin distribution wire insulator tends to be used because it is not easily damaged by measurement.
This composite wire insulator is made by covering the outer surface of a rod-shaped reinforced resin core such as fiber reinforced plastic with an insulating polymer coating such as silicone rubber, and integrally forming a plurality of insulator shades spaced in the length direction into the insulating polymer coating. It is a thing.
[0003]
By the way, in the case of a composite insulator for a distribution line having such a structure, when compared with a ceramic insulator, even if the surface is wet, the surface leakage current is difficult to flow. When contaminants such as salt and dust adhere to the substrate and the atmosphere becomes more humid, leakage current through the surface of the insulator of the distribution line becomes a problem.
For this reason, conventionally, for example, as disclosed in Japanese Patent Laid-Open No. 9-9472, a cup-shaped cylindrical body is integrally formed on a part of a wire spacer corresponding to a distribution wire composite insulator, and salt water is used. A device has been devised to reduce leakage current due to adhesion.
[0004]
[Problems to be solved by the invention]
However, in the structure in which the cup-shaped cylinder is formed integrally with the salt-proof cover of the distribution wire composite insulator, the surface of the insulating polymer coating can be kept dry by the cup-shaped cylinder, but there is a certain effect. When the distribution line composite is installed in a state where the insulator is inclined, salt water or the like accumulates inside the cup-shaped cylinder, which may have an adverse effect.
In addition, in this structure, since the cylinder is integrally formed with the distribution wire composite insulator, it is impossible for the already installed distribution wire composite to take measures against salt damage, the molding itself is difficult, and there is no salt damage. It was necessary to use a different structure for regional use, and there was a limit to reducing the manufacturing cost by mass production.
[0005]
The object of the present invention is to solve the problem of conventional insulators for distribution lines as described above, and it is possible to keep a part of the insulators for the distribution lines always dry. Even so, a composite for distribution lines that can easily take measures against salt damage as needed is to obtain a salt-proof cover for an insulator.
[0006]
[Means for Solving the Problems]
In order to achieve this object, the present invention provides a distribution line composite in which the outer surface of a lightweight rod-shaped reinforced resin core is covered with an insulating polymer coating, and a plurality of insulators spaced apart in the length direction of the reinforced resin core are integrally formed. In an insulator, it comprises a pair of removable semi-cylindrical covers that surround the outer surface of the insulating polymer coating in a spaced state to prevent wetting of the surfaces, and these semi-cylindrical covers are combined with each other when combined with each other. A salt insulation cover for a distribution wire insulator having a fixing part that can be fixed to a predetermined part of an insulating polymer coating, at least one molded clip that maintains a combined state, and a drainage hole for drainage therebetween. It is what we propose.
[0007]
In the description of the preferred embodiments of the invention described below,
1) The semi-cylindrical cover is formed into a bottomed semi-cylindrical shape with one end closed, and the fixing portion is composed of an attachment portion fixed so as to sandwich an insulating polymer-coated rod-shaped portion other than the insulator shade. Structure,
2) The semi-cylindrical cover is formed in a bowl shape having a uniform outer diameter, and the fixing portion is formed on the inner surface of the semi-cylindrical cover substantially in the middle of the length direction and can be engaged with one of the insulator caps. Structure,
3) The semi-cylindrical cover is formed in a bowl shape having a uniform outer diameter, and the fixed portion is formed on the inner surface of the semi-cylindrical cover substantially in the middle of the length direction, and is a rod-shaped part covered with an insulating polymer other than the insulator shade. The structure which is an attachment collar fixed as a state in which is sandwiched is described.
[0008]
【Example】
Hereinafter, the details of the embodiments of the present invention will be described with reference to the drawings.
1 to 3 show details of the first embodiment of the present invention, and FIG. 1 shows a state in which a removable saltproof cover 10A of the present invention is assembled to an existing composite insulator 1 for distribution lines. ing.
[0009]
The lightweight distribution composite insulator 1 has a rod-shaped reinforced resin core 2 made of fiber reinforced plastic or the like, and metal collars 3 and 4 for external connection are fixed to cotter portions 2a and 2b at both ends of the reinforced resin core 2, respectively. The entire outer surface of the reinforced resin core 2 is covered with an insulating polymer coating 5 such as silicone rubber. A plurality of insulator shades 5 a, 5 b, 5 c formed by the insulating polymer coating 5 are integrally formed on the outer peripheral surface of the composite distribution wire insulator 1, and these insulator shades 5 a, 5 b, The creeping discharge and leakage current between the metal collars 3 and 4 are suppressed by 5c.
[0010]
The salt-proof cover 10A in the first embodiment is provided with semi-cylindrical covers 11A and 12A that are resin-molded in a semi-cylindrical cup shape with a flexible insulating resin (for example, silicone rubber), and prevents rainwater and the like from entering inside. In order to prevent this, the meshing edge 13 and the meshing groove 14 are integrally formed on the combined surface of the semi-cylindrical covers 11A and 12A.
Moreover, since two sets of drain holes 15 and 16 for discharging rainwater that has entered inside are formed on the combined surfaces of the semi-cylindrical covers 11A and 12A, the distribution line composite insulator 1 is used in an inclined state. Even if the rainwater enters, the rainwater that has entered the inside of the saltproof cover 10 </ b> A is immediately discharged to the outside through one of these drain holes 15, 16.
[0011]
A closed wall, that is, a mounting portion 11a, 12a (fixed portion), which is fixed in a state in which one cotter portion 2b of the distribution wire insulator 1 is sandwiched, is integrally formed at one end of each of the semi-cylindrical covers 11A, 12A. At the same time, a pair of rigid engagement walls 17 and 18 located outside the integrated surfaces of the semicylindrical covers 11A and 12A are integrally formed, and these engagement walls 17 and 18 are for assembly. Since the forming clips 19 and 20 are integrally formed, the forming clips 19 can be strongly inserted into the clip holes 20 of the opposite semi-cylindrical covers 11A and 12A. Then, each of the semi-cylindrical cover 11A, 12A have stone shade 5a is a distribution line composites 1 of insulators, 5b, the cover portion 11b having a larger diameter D ₂ sufficiently than the outer diameter D ₁ of the 5c, to 12b, Since these cover parts 11b and 12b will be in the state which covered the outer periphery of the nearest insulator shade 5c in the state spaced apart, if the salt-proof cover 10A is fixed to the composite insulator 1 for distribution lines, the inner surface of the salt-proof cover 10A will be covered. It is always dry.
[0012]
Since the salt-proof cover 10A according to the first embodiment has the above-described structure, a distribution line composite having a plurality of insulator shades 5a, 5b, and 5c is attached to the insulator 1 as needed to form a salt damage prevention measure structure. be able to.
That is, in order for the distribution wire insulator 1 to have a salt damage countermeasure structure, the distribution wire composite insulator 1 is fixed to the cotter portions 2a and 2b of the distribution wire insulator 1 by fixing the attachment portions 11a and 12a of the distribution wire insulator 1 to the same salt prevention salt. Since the entire insulator shade 5c closest to the cover 10A is covered with the cover portions 11b and 12b of the semi-cylindrical covers 11A and 12A, the intrusion of rainwater and the like into the semi-cylindrical covers 11A and 12A is substantially prevented. Even if rainwater has entered, the rainwater is immediately discharged to the outside through the drain holes 15 and 16.
In this case, since the insulator caps 5c are arranged inside the semi-cylindrical covers 11A and 12A, it is difficult for rainwater or the like to enter directly into the semi-cylindrical covers 11A and 12A, and the inner surfaces of the semi-cylindrical covers 11A and 12A are Since it is always maintained in a dry state, it is possible to suppress an increase in leakage current due to wetting with salt water.
[0013]
Further, in order to attach the salt-proof cover 10A to the distribution wire composite insulator 1, the semi-cylindrical covers 11A and 12A are combined on the combined surface with the distribution wire composite surrounding the cotter portions 2a and 2b of the insulator 1. At the same time, the saltproof cover 10A can be easily fixed to the distribution wire insulator 1 simply by strongly inserting the molding clips 19 of the semicylindrical covers 11A and 12A into the corresponding clip holes 20 of the mating semicylindrical covers 11A and 12A. Therefore, the already installed composite for distribution lines can be easily attached to the insulator 1.
And this salt-proof cover 10A needs only to be attached to the distribution wire composite insulator 1 that has not been subjected to salt damage countermeasures as needed. By avoiding the necessity of manufacturing, the distribution line composite can contribute to the reduction of the manufacturing cost due to the mass production effect of the insulator 1.
[0014]
4 to 6 show a salt-proof cover 10B according to a second embodiment of the present invention. The salt-proof cover 10B of this embodiment is molded in a bowl shape with a flexible insulating resin (for example, silicone rubber). Although the semi-cylindrical covers 11B and 12B are provided, in order to prevent rainwater and the like from entering the inside, the engaging edge 13 and the engaging groove 14 are integrally formed on the combined surface of these semi-cylindrical covers 11B and 12B. Is the same as in the first embodiment.
In addition, a mounting groove 21 (fixed portion) is formed on the inner surface of each semi-cylindrical cover 11B, 12B in the longitudinal direction so that the distribution wire composite can engage with one (center) insulator cap 5b of the insulator 1; This mounting groove 21 can be fitted to the corresponding insulator shade 5b. As for the length of these semi-cylindrical covers 11B and 12B, if an interval L of about 10 mm is formed between the insulator caps 5a and 5c facing the end faces, the semi-cylindrical covers 11B and 12B and these It is possible to prevent snow from falling between the insulator shades 5a and 5c. When these intervals L are present, the insulator caps 5a and 5c are positioned so as to block the entrances of the semi-cylindrical covers 11B and 12B, so that the inner surfaces of the semi-cylindrical covers 11B and 12B can always be kept dry.
And since two sets of drain holes 15 and 16 for discharging rainwater that has entered inside are formed on the combination surfaces on both sides of these mounting grooves 21, respectively, the distribution line composite insulator 1 is tilted. Even if it is used, rainwater that has entered the inside of the salt-proof cover 10B is immediately discharged to the outside through one of these drain holes 15 and 16.
[0015]
A pair of rigid engagement walls 17, 18 positioned outside of the semi-cylindrical cover 11 B, 12 B are integrally formed on the combined surfaces, and the engagement walls 17, 18 are molded for assembly. Since the clip 19 and the clip hole 20 are integrally formed, these molded clips 19 can be strongly inserted into the clip holes 20 of the opposite semi-cylindrical covers 11B and 12B.
[0016]
Since the salt-proof cover 10B according to the second embodiment has the above-described structure, a distribution line composite having a plurality of insulator shades 5a, 5b, 5c is attached to the insulator 1 as necessary to form a salt damage prevention measure structure. This is possible as in the case of the first embodiment. That is, in order to make the distribution wire insulator 1 have a salt damage prevention structure, the distribution wire composite insulator 1 is fixed to the insulator shade 5b of the distribution wire composite 1 by fixing the mounting groove 21 of the distribution wire insulator 1 to the entire insulator insulator 5b. Since it is covered with the semi-cylindrical covers 11B and 12B, the intrusion of rainwater or the like into the semi-cylindrical covers 11B and 12B is substantially prevented. , 16 are immediately discharged to the outside. Therefore, the semi-cylindrical cover 11B, since the inner and Boshio cover 10B and 12B are maintained in a state surface which always dry Shi gargle fixed bevel 5b, possible to suppress the leakage current increases wet with brine .
[0017]
Further, in order to attach the salt-proof cover 10B to the composite insulator 1 for the distribution line, the mounting groove 21 of the salt-proof cover 10B is fitted into the insulator shade 5b, and both the semi-cylindrical covers 11B and 12B are aligned on the combination surface. The salt-proof cover 10B can be easily fixed to the distribution wire insulator 1 simply by strongly inserting the molding clip 19 of the semi-cylindrical covers 11B and 12B into the corresponding clip hole 20 of the other semi-cylindrical covers 11B and 12B. As in the case of the first embodiment, the distribution line composite already installed can be easily attached to the insulator 1, but when compared with the first embodiment, the saltproof cover 10B is fixed to the insulator 5b. Therefore, there is an advantage that the mounting position of the salt-proof cover 10B with respect to the distribution wire composite insulator 1 is accurate.
And this salt-proof cover 10B only needs to be attached to the distribution wire composite insulator 1 that has not been subjected to salt damage countermeasures as needed. It goes without saying that it is possible to avoid the necessity of manufacturing and to contribute to the reduction of the manufacturing cost due to the mass production effect of the insulator 1 for distribution lines.
[0018]
7 to 9 show a salt-proof cover 10C according to a third embodiment of the present invention. The salt-proof cover 10C of this embodiment is molded in a bowl shape with a flexible insulating resin (for example, silicone rubber). Although the semi-cylindrical covers 11C and 12C are provided, in order to prevent rainwater and the like from entering the inside, the engaging edge 13 and the engaging groove 14 are integrally formed on the combined surfaces of these semi-cylindrical covers 11C and 12C. Is the same as in the first and second embodiments.
In addition, a mounting collar 22 (fixed portion) that can engage the rod-shaped portion between the insulator shades 5b and 5c of the insulator 1 is integrally formed inside the semi-cylindrical covers 11C and 12C in the longitudinal direction. The center hole 23 of the mounting collar 22 can be fitted to a bar-like portion in the middle of the insulator caps 5a, 5b, 5c.
And since two sets of drain holes 15 and 16 for discharging rainwater that has entered inside are formed on the combined surfaces on both sides of these mounting collars 22, respectively, the distribution line composite insulator 1 is tilted. Even if it is used, rainwater that has entered the inside of the salt-proof cover 10C is immediately discharged to the outside through one of these drain holes 15,16.
[0019]
A pair of rigid engagement walls 17, 18 located outside of the semi-cylindrical cover 11 </ b> C, 12 </ b> C are integrally formed, and the engagement walls 17, 18 are molded for assembly. Since the clip 19 and the clip hole 20 are integrally formed, the first embodiment and the second embodiment can insert these formed clips 19 into the clip holes 20 of the opposite semi-cylindrical covers 11C and 12C. The same as in the example.
[0020]
Since the salt-proof cover 10C according to the third embodiment has the above-described structure, the salt damage-preventing countermeasure structure can be obtained by attaching the distribution line composite insulator to the rod-shaped portion of the insulator 1 as necessary. This is the same as in the case of the embodiment and the second embodiment.
That is, in order for the distribution wire insulator 1 to have a salt damage prevention structure, the distribution wire composite surrounds the insulator shades 5a, 5b, 5c of the insulation wire 1, and the mounting collar 22 is attached to the rod-shaped portion of the distribution wire composite insulator 1. Is fixed, the insulator caps 5a, 5b, 5c located inside the salt-proof cover 10C are covered with the semi-cylindrical covers 11C, 12C, so that rainwater enters the semi-cylindrical covers 11C, 12C. Even if there is rainwater that has entered, the rainwater is immediately discharged to the outside through the drain holes 15 and 16.
In this case, since the insulator caps 5b and 5c are arranged inside the semi-cylindrical covers 11C and 12C, it is difficult for rainwater or the like to directly enter the semi-cylindrical covers 11C and 12C. Is always maintained in a dry state, so that it is possible to suppress an increase in leakage current due to wetting with salt water.
[0021]
Further, in order to attach the salt-proof cover 10C to the distribution wire insulator 1, the semi-cylindrical covers 11C and 12C are placed in a state where the mounting collar 22 of the salt-proof cover 10C is positioned in the middle of the insulator shades 5a, 5b and 5c. The salt-proof cover 10C can be easily combined with the distribution insulator 1 by simply inserting the forming clips 19 of the semicylindrical covers 11C and 12C into the corresponding clip holes 20 of the mating semicylindrical covers 11C and 12C. As in the case of the first embodiment and the second embodiment, the already installed distribution line composite can be easily attached to the insulator 1 as well.
And this saltproof cover 10C has only to be attached to the distribution wire composite insulator 1 that is not subjected to salt damage countermeasures as needed. As in the case of both of the above-described embodiments, it is possible to avoid the necessity of manufacturing and to contribute to the manufacturing cost reduction by the mass production effect of the insulator 1 for the distribution line.
[0022]
In the description of each of the embodiments described above, the structure in which the half-cylindrical covers formed separately are combined with the molding clip has been described. However, these semi-cylindrical covers are connected to each other by flexible hinges. A structure in which the composite for distribution lines covers a part of the insulator with the same semi-cylindrical cover and then fixed to each other with a molding clip that is integrally formed with each semi-cylindrical cover.
[0023]
【The invention's effect】
As is clear from the above description, according to the present invention, the existing distribution line composite can be used by being attached to the insulator as needed. Therefore, the distribution line composite with the salt damage countermeasure structure can be used with the same countermeasure. Distribution wire composites can be easily created separately. The salt-proof cover for the distribution wire composite insulator has the advantage that the already installed distribution-wire composite cover can be easily attached to the insulator, and rainwater that has entered the salt-proof cover is immediately discharged to the outside. Therefore, there is an effect that the increase of leakage current can be effectively suppressed by keeping the inside of the saltproof cover always dry.
[Brief description of the drawings]
FIG. 1 is a partially cutaway plan view showing a state in which a saltproof cover according to a first embodiment of the present invention is attached to a composite insulator.
FIG. 2 is a right side view of the salt prevention cover with a part cut away.
FIG. 3 is a front view of a semi-cylindrical cover of the saltproof cover.
FIG. 4 is a partially cutaway plan view showing a state in which a saltproof cover according to a second embodiment of the present invention is attached to a composite insulator.
FIG. 5 is a right side view in which a part of the saltproof cover is cut away.
FIG. 6 is a front view of a semi-cylindrical cover of the saltproof cover.
FIG. 7 is a partially cutaway plan view showing a state in which a saltproof cover according to a third embodiment of the present invention is attached to a composite insulator.
FIG. 8 is a right side view of the salt prevention cover with a part cut away.
FIG. 9 is a front view of a semi-cylindrical cover of the saltproof cover.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Distribution wire composite insulator 2 Reinforced resin core 5 Insulating polymer coating 5a, 5b, 5c Insulator shade 10A-10C Salt prevention cover 11A-11C Semi-cylindrical cover 12A-12C Semi-cylindrical cover 11a, 12a Attaching part (fixed part)
15, 16 Drain hole 19 Molding clip 20 Clip hole 21 Mounting groove (fixed part)
22 Mounting collar (fixed part)

Claims (3)

The outer surface of the lightweight rod-shaped reinforced resin core (2) is covered with an insulating polymer coating (5), and a plurality of insulator shades (5a, 5b, 5c) separated in the length direction of the reinforced resin core (2) are integrally formed. The distributed distribution composite is the salt-proof cover (10A) of the insulator (1),
A pair of removable semi-cylindrical covers (11A, 12A) surrounding the outer surface of the insulating polymer coating (5) in a spaced state to prevent wetting of the surface;
The semi-cylindrical covers (11A, 12A) are formed into a bottomed semi-cylindrical cup shape with one end closed,
On the combined surface of the semi-cylindrical covers (11A, 12A), the meshing edge 13 and the meshing groove 14 are integrally formed, and drain holes (15, 16) for discharging rainwater entering the interior are formed.
One end of the semi-cylindrical cover (11A, 12A) is integrally formed with a closed wall, that is, a fixed portion (11a, 12b) fixed in a state where the cotter portion (2b) of the distribution wire composite insulator (1) is sandwiched. ,
A pair of rigid engaging walls (17, 18) located outside of the combined surfaces of the semi-cylindrical covers (11A, 12A) are integrally formed,
Molded clips (19) and (20) for assembly are integrally formed on the engagement walls (17, 18), respectively, and these molded clips (19, 20) are formed in clip holes of the opposite semi-cylindrical cover. It is configured to be plugged in,
Semi-cylindrical cover (11A, 12A) is a composite power distribution line insulators (1) the insulators bevel (5a, 5b, 5c) having a covering portion with a large diameter D ₂ sufficiently than the outer diameter D ₁ of the, the A special anti-salt cover for insulators. The outer surface of the lightweight rod-shaped reinforced resin core (2) is covered with an insulating polymer coating (5), and a plurality of insulator shades (5a, 5b, 5c) separated in the length direction of the reinforced resin core (2) are integrally formed. The distributed distribution composite is the salt-proof cover (10B) of the insulator (1),
A pair of removable semi-cylindrical covers (11B, 12B) surrounding the outer surface of the insulating polymer coating (5) in a spaced state to prevent wetting of the surface;
Each of the semi-cylindrical covers (11B, 12B) is formed into a bowl shape with a uniform outer diameter,
On the combined surface of the semi-cylindrical covers (11B, 12B), a meshing edge (13) and a meshing groove (14) are integrally formed,
A mounting groove (21, a fixed portion) is formed on the inner surface of the intermediate portion in the longitudinal direction of the semi-cylindrical cover (11B, 12B) so that the distribution wire composite insulator can engage with the central insulator (5b) of the insulator (1). ,
The mounting groove (21) can be fitted to the corresponding insulator shade (5b),
The length of the semi-cylindrical cover (11B, 12B) is such a length that a predetermined interval (L) is formed between the insulator caps (5a, 5c) facing the end surfaces thereof,
Drain holes (15, 16) are formed on the combined surfaces on both sides of the mounting groove (21),
A pair of rigid engagement walls (17, 18) located outside of the combination surfaces of the semi-cylindrical covers (11B, 12B) are integrally formed, and these engagement walls (17, 18) are integrally formed. The molded clip (19) and the clip hole (20) for assembly are integrally formed,
These molded clips (19) are configured to be inserted into the clip holes (20) of the opposite semi-cylindrical covers (11B, 12B).
This is a salt-proof cover for insulators. The outer surface of the lightweight rod-shaped reinforced resin core (2) is covered with an insulating polymer coating (5), and a plurality of insulator shades (5a, 5b, 5c) separated in the length direction of the reinforced resin core (2) are integrally formed. The distribution line composite is the salt-proof cover (10C) of the insulator (1),
A pair of removable semi-cylindrical covers (11C, 12C) surrounding the outer surface of the insulating polymer coating (5) in a spaced state to prevent wetting of the surface;
Each of the semi-cylindrical covers (11C, 12C) is formed into a bowl shape with a uniform outer diameter,
On the combined surface of the semi-cylindrical covers (11C, 12C), a meshing edge (13) and a meshing groove (14) are integrally formed,
In the middle of the semi-cylindrical cover (11C, 12C) in the longitudinal direction, a mounting collar (22, fixed part) that can be engaged with the rod-shaped part between the insulator shades (5b, 5c) of the composite insulator for distribution lines (1) ) Is integrally molded,
The center hole (23) of the mounting collar (22) can be fitted to the middle rod-shaped portion of the insulator shade (5a, 5b, 5c),
Drain holes (15, 16) for discharging rainwater that has entered inside are formed on the combined surfaces on both sides of these mounting collars (22), respectively.
A pair of rigid engaging walls (17, 18) located outside of the combined surfaces of the semi-cylindrical covers (11C, 12C) are integrally formed,
The engaging walls (17, 18) are integrally formed with a molding clip (19) and a clip hole (20) for assembly,
These molded clips (19) are inserted into the clip holes (20) of the opposite semi-cylindrical covers (11C, 12C).
The semi-cylindrical cover (11C, 12C) has a shape surrounding the insulator shade (5a, 5b, 5c) of the distribution wire composite insulator (1), and is attached to the rod-shaped portion of the distribution wire composite insulator (1). (22) is fixed, and the insulator caps (5a, 5b, 5c) located inside the saltproof cover (10C) are covered with the semi-cylindrical covers (11C, 12C). Anti-salt cover for composite insulators for electric wires.

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