JP4797040B2 - Distribution line mooring device - Google Patents

Description

  The present invention relates to an apparatus for mooring a distribution line such as a power line or a communication line to an insulator provided on a power pole.

  When mooring a high-voltage distribution line to an insulator provided on a power pole, conventionally, as shown in FIG. Generally, the bind wire c is fixed to the insulator a by winding the bind wire c made of a steel wire in a coil shape from the outer periphery of the insulator a to the outer periphery of the distribution line b.

In addition, the live work clamp shown in the following Patent Document 1 relating to the patent application of the present patent applicant is pivotally supported at the upper end so that the pair of half-clamps can be opened and closed in the vertical plane, By closing both half clamps, the distribution line is clamped and at the same time the clamp is crowned on the top of the insulator, so that the distribution line can be easily moored on the insulator on the utility pole.
JP 2002-27647 A

  By the way, when the distribution line b is fixed by the bind line c as described above, if the bind line c is wound too much, the insulation coating of the distribution line b is bitten. There was a possibility that minute cracks would occur and the insulation could be impaired. Further, in the long term, the insulating coating of the bind wire c is deteriorated even by ultraviolet rays, so that the insulating property may be impaired. In addition, since the height of the distribution line b is usually about the same as the height of the roadside tree, there is a risk that the branch of the roadside tree will be beaten by a strong wind to bash the distribution line b and damage the insulation coating.

  On the other hand, the live wire work clamp shown in Patent Document 1 is one in which a distribution line is clamped by a half cylinder part formed at the upper part of the opposing inner surface of a pair of half-cut clamps. Has a problem that rainwater tends to accumulate inside.

  FIG. 12 is a graph showing the relationship between the salinity concentration and the conductivity. For example, when the salinity concentration is 15%, the conductivity rapidly increases as the salinity concentration increases so that the conductivity becomes 1600 times or more of rainwater. . For this reason, when water containing salt repeatedly adheres to the sandwiched portion or the like, the insulation properties are significantly impaired, and a tracking phenomenon occurs in which current leaks through the metal arm metal of the utility pole, carbonizing the insulation coating, If the situation continued for a certain period of time, a large current flowed at a stretch, which could cause a power outage accident. Such salt damage is caused not only by the area close to the coast, but also by the strong seasonal winds and snow that the water containing salt from seawater is carried to the inland by several tens of kilometers. As the water evaporates, the salinity increases and the desired insulation is not maintained, which may cause a power outage accident as described above.

The distribution line mooring device of the present invention is intended to solve the above-described problems, and a pair of half-clamps are pivotally supported at the upper ends so that they can be opened and closed within a vertical plane, and oppositely arranged protrusions on the lower outer surface, the projecting portion to form the engagement protrusion and the engaging hole matching with each other when closing the two half-cut clamp, than semicircle on opposite inner surface upper part of the respective half-cut clamp A cylindrical portion having a lower edge formed to be short so as to be short is formed horizontally so that a gap is formed between the lower edges when both half clamps are closed, and the relative positions of the respective half clamps Forming an indentation in the lower part of the inner surface, forming an insulative cylindrical cover in which a separation part along the longitudinal direction is formed in the lower part and a rib extending downward from the separation part is formed, and between the separation parts covering the distribution line by the cylindrical cover by expanding a said rib The cylindrical cover is suspended by a gap between the lower edges and the tubular cover is sandwiched by the tubular portion, and the upper umbrella-shaped portion of the insulator is sandwiched by the recessed portion by closing both half clamps. Rainwater that has entered the cover is discharged from the separation portion into the gap between the lower edges, and the rainwater discharged into the gap is further discharged outside the half clamp along the outer periphery of the insulator. And
In this way, covering the distribution line with the cylindrical cover increases insulation, and the separation portion of the cylindrical cover is always moored so that the discharge path is secured and the Rainwater or the like does not collect in the cylindrical cover.

  Since rainwater and the like are reliably discharged, it is possible to prevent the occurrence of an accident from a leakage to a power failure.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of a distribution line mooring device according to the present invention, and FIG. 2 is a perspective view of an assembled state thereof. The pair of half-clamps 1 and 1 are made of a hard synthetic resin such as polyethylene, the opposed surfaces are opened and the left and right sides are formed approximately symmetrically, and the bearing portions 2a and 2b are integrally formed at the upper end portion. By inserting the support shaft 3 so that the bearing portions 2a and 2b cross each other and mesh with each other by making the open surfaces of the half clamps 1 and 1 face each other, as shown in FIG. The clamps 1 and 1 are assembled so that they can be opened and closed in a vertical plane.

  Protrusions 4a and 4b are provided on the lower outer surface of each half clamp 1, 1, and an engagement projection 5a and an engagement hole 5b are formed in the projection, respectively, and both half clamps 1, 1 are closed. When the engagement protrusions 5a are fitted into the engagement holes 5b, the engagement protrusions 5a are formed in an arrow shape and are split into two forks so that they can elastically expand and contract. Therefore, when fitted into the engagement hole 5b, the tip portion is restored and is not removed from the engagement hole 5b. For this reason, the half clamps 1 and 1 can be held in a closed state by engaging the engagement protrusion 5a and the engagement hole 5b.

  Further, a cylindrical portion 6 is horizontally formed on the inner surface of each half clamp 1, 1 opposite to each other, and a bowl-shaped recessed portion 7 is formed on the lower portion of the inner surface of each half clamp opposed to each other. Each cylindrical portion 6 has a lower edge formed so as to be shorter than a semicircle, and a gap 8 is formed at the lower edge when both half clamps 1 and 1 are closed, as will be described later. To. In addition, a plurality of protruding pieces 9 are formed on the inner surface of the recessed portion 7 at appropriate intervals.

  On the other hand, as shown in FIG. 3, 10 is an insulating cylindrical cover formed of a synthetic resin, 11 is a distribution line covered with the cylindrical cover, and the cylindrical cover is formed in the longitudinal direction on the lower side. Is formed, and a rib 10b extending downward from the separation portion is integrally formed. Then, the tubular cover 10 is cut into a suitable length, and the distribution line 11 can be inserted into the tubular cover by elastically expanding the separation portion 10a.

  Next, the use state of the half-cut clamps 1 and 1 for mooring the distribution line 11 will be described with reference to FIGS. In the figure, reference numeral 12 denotes a multi-stage umbrella-shaped insulator which is erected on an arm 13 of a utility pole. When mooring the distribution line 11 to the insulator 12, the cylindrical cover 10 is clamped by the cylindrical portions 6 of the half-cut clamps 1, 1, and the half-cut clamps 1, 1 are closed to close the concave portion. 7, the upper umbrella portion 12 a of the lever 12 is clamped, and the engagement projection 5 a and the engagement hole 5 b are engaged to attach the half-cut clamps 1, 1 to the upper portion of the lever 12. At that time, as shown in FIG. 5, the separation portion 10 a of the cylindrical cover 10 can be always directed downward by setting the rib 10 b to hang down in the gap 8. For this reason, rainwater that has entered the cylindrical cover 10 from both ends of the cylindrical cover 10 is discharged into the gap 8 from the separation portion 10a, and the rainwater discharged into the gap 8 further flows around the outer periphery of the insulator 12. It is transmitted to the outside of the half clamps 1 and 1. For this reason, rainwater does not accumulate in the cylindrical cover 10. The plurality of projecting pieces 9 projecting from the inner surface of the recessed portion 7 are useful for fixing the half clamps 1 and 1 to the outer peripheral surface of the insulator 12 without rattling. The rainwater is easily discharged along the surface of the insulator 12.

Thus, the distribution line mooring device of the present invention does not wind too strongly or conversely too weakly, unlike the mooring work using the conventional binding wire, and has good workability and poor construction. Since there is no fear, anyone can easily moor the distribution line 11 to the insulator 12 on the utility pole. And, since the drainage path is always secured by allowing the ribs of the cylindrical cover to hang down in the gap between the cylindrical parts formed when the half-cut clamp is closed, there is a risk that rainwater or the like will accumulate Insulation is maintained. In short, the drainage path can always be secured by allowing the ribs of the cylindrical cover to fall within the gap between the two cylindrical portions formed when the half-cut clamp is closed.
In addition, by covering the distribution line 11 with the cylindrical cover 10 in this way, it is possible to eliminate damage from a branch of a roadside tree or the like.

  Although the length of the cylindrical cover 10 depends on the environmental conditions of the installation location, a sufficient ground leakage prevention effect is recognized by setting the portion protruding from the cylindrical portion 6 to 5 cm or more in the results of the actual field verification at the seaside. It was. However, in consideration of protecting the distribution line 11 from bashing by street trees, it is desirable that the portion protruding from the tubular portion 6 be 10 cm or more.

The cylindrical cover 10 shown in this embodiment is a general one integrally formed with ribs 10b extending downward from the separating portion 10a, but the shape of the cylindrical cover is as shown in FIG. The shape which formed the unevenness | corrugation which mutually meshes in the opposing inner surface of rib 10b, 10b, what formed the rib 10b only on one side as shown in FIG. 7, what formed the lip 10c in the isolation | separation part 10a as shown in FIG. Alternatively, as shown in FIG. 9, various forms can be used such as a thin hinge portion 10d formed on the upper portion so that the space between the separating portions 10a can be expanded.
Further, the shape of the half-cut clamp is not limited to this embodiment, and as illustrated in FIG. 10, the outer shape of the recessed portion may be formed in a semicircular shape. In the figure, the same reference numerals are assigned to the same parts as those in the above embodiment.

  The distribution line mooring apparatus according to the present invention can be used not only for power lines shown in this embodiment but also for mooring other aerial lines such as communication lines.

The disassembled perspective view of the distribution line mooring apparatus which concerns on this invention. The perspective view of the assembly state of the distribution line mooring apparatus which concerns on this invention. The perspective view of the distribution line covered with the cylindrical cover. The perspective view which showed the use condition of the distribution line mooring apparatus which concerns on this invention. The side view which shows the use condition of the distribution line mooring apparatus which concerns on this invention. The cross-sectional view which showed other embodiment of the cylindrical cover. The cross-sectional view which showed other embodiment of the cylindrical cover. The cross-sectional view which showed other embodiment of the cylindrical cover. The cross-sectional view which showed other embodiment of the cylindrical cover. The perspective view which showed other embodiment of the distribution line mooring apparatus which concerns on this invention. The perspective view which showed the mooring state of the conventional distribution line. The graph which shows the relationship between salt concentration and electrical conductivity.

Explanation of symbols

1,1 Half-cut clamps 2a, 2b Bearing part 3 Support shafts 4a, 4b Projection part 5a Engagement protrusion 5b Engagement hole 6 Cylindrical part 7 Recessed part 8 Clearance 9 Projection piece 10 Cylindrical cover 10a Separation part 10b Rib 11 Arrangement Electric wire 12

Claims (1)

A pair of half-clamps are pivotally supported at the upper end so that they can be opened and closed in a vertical plane, a protrusion is provided on the lower outer surface of each half-clamp, and both half-clamps are closed to the protrusion. When an engagement projection and an engagement hole that coincide with each other are formed, a cylindrical part having a lower edge formed in a chip shape so as to be shorter than a semicircle is formed horizontally on the inner surface of each half clamp facing each other , A gap is formed between the lower edges when both the half clamps are closed, and a concave portion is formed at the lower part of the inner surface of each half clamp ,
An insulating cylindrical cover is formed in which a separating portion along the longitudinal direction is formed on the lower side portion, and a rib extending downward from the separating portion is formed, and the space between the separating portions is widened by the cylindrical cover. Covering the distribution line,
The rib is suspended in the gap between the lower edges, the cylindrical cover is sandwiched by the tubular portion, and the upper umbrella-shaped portion of the insulator is sandwiched by the recessed portion by closing both half clamps, Rainwater that has entered the cylindrical cover is discharged from the separation portion into the gap between the lower edges, and the rainwater discharged into the gap is further transferred to the outer periphery of the insulator to be discharged out of the half clamp . Distribution line mooring device characterized by that.

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