JP7597362B2 - How to install organic insulators - Google Patents

Description

The present invention relates to a method for installing an organic insulator .

Porcelain insulators have traditionally been used as insulators for overhead power transmission equipment such as steel towers, but these are heavy and prone to cracking.
For this reason, in recent years, organic insulators (also called polymer insulators, etc.) having a core such as glass fiber reinforced plastic (FRP) covered with an outer cover made of silicone rubber or the like have been increasingly used (see, for example, Patent Document 1).

JP 2001-093367 A

Incidentally, when insulators are installed in overhead power transmission equipment, they are often placed near a tower or the like in advance and then pulled up and installed on the day of installation. However, unlike porcelain insulators, if organic insulators are placed near a tower or the like, there is a risk that the organic material parts will be eaten by birds and animals.
Furthermore, if the organic insulators are eaten by birds and animals, there is a possibility that the organic insulators will no longer be able to perform their intended functions in terms of insulation properties, etc., when installed in overhead power transmission equipment.

The present invention has been made in consideration of the above problems, and has an object to provide a method for installing organic insulators that enables organic insulators to be properly installed in overhead power transmission equipment without being eaten by birds and animals.

In order to solve the above problem, the present invention provides a method for installing an organic insulator, comprising the steps of:
an organic insulator preparation process for preparing an organic insulator wrapped in a protective cover in the vicinity of an overhead power transmission facility;
an organic insulator installation process for lifting the organic insulator to an installation location of the overhead power transmission equipment, installing a terminal fitting on one end side of the organic insulator exposed from the protective cover to the installation location while the organic insulator is still wrapped in the protective cover, and attaching an electric wire to the terminal fitting on the other end side of the organic insulator that is exposed, thereby installing the organic insulator wrapped in the protective cover to the overhead power transmission equipment;
a protective cover removing step of cutting the protective cover from a terminal fitting side on the one end side or a terminal fitting side on the other end side of the organic insulator to remove the protective cover from the organic insulator installed in the overhead power transmission equipment;
The present invention is characterized by comprising:

The invention described in claim 2 is the method for installing an organic insulator described in claim 1, characterized in that in the protective cover removal process, a pulling string provided on the protective cover is pulled to cut open the protective cover approximately parallel to the central axis of the organic insulator inside.

The invention described in claim 3 is characterized in that in the method for installing an organic insulator described in claim 2, the tension cord is pulled out from the protective cover to the terminal fitting side of the one end of the organic insulator.

According to the present invention, it is possible to properly install organic insulators on overhead power transmission equipment without them being eaten by birds and animals.

4 is a flowchart showing each step of a method for installing an organic insulator according to the present embodiment. FIG. 2 is a diagram illustrating an example of the configuration of an organic insulator body. FIG. 2 is a diagram illustrating a configuration example of an organic insulator wrapped in a protective cover. 1A and 1B are diagrams illustrating an example of a method for making a protective cover. FIG. 1A is a cross-sectional view showing that a thinner portion is formed at the pull string portion, and FIG. 1B is a cross-sectional view taken along line XX of FIG. FIG. 13 is a diagram showing that the protective cover can be cut open by pulling the pull cord. FIG. 13 is a diagram showing an example of an organic insulator attached to a cross arm of a tower while still wrapped in a protective cover. FIG. 13 is a diagram showing an example of an organic insulator attached to a cross arm of a tower while still wrapped in a protective cover.

Hereinafter, a method for installing an organic insulator, an organic insulator, and a protective cover according to this embodiment will be described with reference to the drawings.
However, the embodiments described below are subject to various limitations that are technically preferable for implementing the present invention, but the scope of the present invention is not limited to the following embodiments or illustrated examples.
In addition, although the following describes a case where the overhead power transmission equipment on which the organic insulators are installed is a steel tower, the overhead power transmission equipment may be equipment other than a steel tower.

FIG. 1 is a flow chart showing each step of the method for installing an organic insulator according to the present embodiment.
The method for installing the organic insulator according to this embodiment will be described below with reference to the flow chart in Fig. 1. The organic insulator and protective cover used in this installation method will also be described.

In the method for installing an organic insulator according to this embodiment, first, the organic insulator 1 is prepared by, for example, placing the organic insulator 1 wrapped in the protective cover 10 near a pylon in advance (step S1, organic insulator preparation step).
In this embodiment, as shown in FIG. 2, the organic insulator 1 is formed by covering the outer circumference of a core 2 made of fiberglass reinforced plastic (FRP) with an outer skin (cap) 3 made of silicone rubber, and terminal fittings 4A, 4B for mounting are provided on both ends of the core 2.

The organic insulator 1 is covered in a cylindrical protective cover 10 before being placed near the pylon (for example, when the organic insulator 1 is shipped from the factory), as shown in Fig. 3. However, only the terminal fittings 4A, 4B at both ends of the organic insulator 1 are exposed to the outside from the protective cover 10.
The organic insulator 1 is then transported, wrapped in a protective cover 10, to the vicinity of the tower and left there.

In this manner, in this embodiment, the organic insulator 1 is configured to be wrapped in the protective cover 10 before being transported to the vicinity of the tower. Therefore, even if the organic insulator 1 is placed near the tower before being installed on the tower, the organic insulator 1 is wrapped in the protective cover 10, and it is possible to prevent the organic insulator 1 from being eaten by birds and animals.
Therefore, when the organic insulator 1 is installed on a steel tower, it is possible to prevent the organic insulator 1 from becoming easily soiled and from losing its insulating properties.

Here, the configuration of the protective cover 10 according to this embodiment will be described.
In this embodiment, the protective cover 10 is a cover for encasing and protecting the organic insulator 1, and is made of soft resin and has a cylindrical structure, as shown in Fig. 3. It may also be formed of knitted soft resin fibers.

The protective cover 10 has both ends sealed by welding or bonding, but openings 11A, 11B are formed so that the terminal fittings 4A, 4B at both ends of the organic insulator 1 are exposed to the outside from these openings 11A, 11B.
In this manner, by configuring the protective cover 10 so that both ends are sealed, it is possible to prevent birds and animals from entering the protective cover 10 from both ends of the protective cover 10. Therefore, even if the organic insulator 1 is placed near a steel tower or the like before being installed on the steel tower or the like, it is possible to reliably prevent the organic insulator 1 from being eaten by birds and animals.

Incidentally, instead of sealing both ends of the protective cover 10 by welding, adhesive, or the like as described above, it is also possible, for example (not shown) to attach string to each end of the protective cover 10 and tie the terminal fittings 4A, 4B at both ends of the organic insulator 1 with the string, thereby sealing both ends of the tubular protective cover 10.
Furthermore, in the case where birds, small animals, etc. will not enter inside the cylindrical protective cover 10 even if both ends of the protective cover 10 are open, both ends of the protective cover 10 do not necessarily need to be sealed.

On the other hand, in this embodiment, the protective cover 10 can be cut open and removed from the organic insulator 1 .
Although not shown in the drawings, a fastener, a hook-and-loop fastener, or the like can be used as a structure for cutting open the protective cover 10. However, the fastener may rub against the organic insulator 1, which may damage the silicone rubber outer cover 3 of the organic insulator 1. Furthermore, if the hook-and-loop fastener is difficult to peel off, the task of cutting open the protective cover 10 may become complicated.

Therefore, for example, by configuring the protective cover 10 as follows, it becomes possible to easily cut open the protective cover 10 without damaging the organic insulator 1 .
That is, as shown in FIG. 4(a), a cylinder 10 ^* that is about twice as long as the protective cover 10 shown in FIG. 3 is formed using the material of the protective cover 10, and a cut is made from one end of the cylinder to half its length in the longitudinal direction to form a string-like structure 12 (hereinafter referred to as the pulling string 12).
It should be noted that the thickness of the pull string 12 relative to the protective cover 10 in FIG. 3 and the subsequent figures does not necessarily reflect reality.

Then, as shown in FIG. 4( b ), the protective cover 10 is formed by folding the one side 10</b>A on which the pulling string 12 is formed inside the other side 10</b>B.
In this case, one side 10A of the folded portion (or at least the portion of one side 10A adjacent to the pull string 12) is attached to the inside of the other side 10B, but the pull string 12 is not attached to the inside of the other side 10B. As a result, a portion α that is thinner than the surrounding area is formed at the portion of the protective cover 10 where the pull string 12 is located, as shown in Figure 5 (a).

Therefore, when the pulling string 12 is pulled in the longitudinal direction of the protective cover 10, the thin portion α is torn by the pulling string 12 as shown in FIG. 5(b).
Therefore, as shown in FIG. 6, by pulling the pulling string 12 provided on the protective cover 10, it is possible to cut open the protective cover 10 substantially parallel to the central axis of the organic insulator 1 therein.

In Figure 6, the pulling string 12 is pulled from the inside of the protective cover 10 to the terminal metal 4A side of the organic insulator 1, and the protective cover 10 is cut open from the other terminal metal 4B side by pulling the pulling string 12. However, it is also possible to configure the protective cover 10 so that it is cut open from the terminal metal 4A side by pulling the pulling string 12 that has been pulled out to the terminal metal 4B side.

In order to prevent the pulling string 12 from breaking, the pulling string 12 can be reinforced by making the pulling string 12 thicker or by threading an additional string through the pulling string 12.
It is also possible to configure the protective cover 10 to be easily cut open by the pull string 12, for example by providing a perforation in the portion that is to be cut open by the pull string 12, and a configuration for appropriately cutting open the protective cover 10 by pulling on the pull string 12 is appropriately adopted.

Next, in the organic insulator installation method according to this embodiment, the organic insulator 1 wrapped in the protective cover 10 is lifted up to the attachment point of the tower (overhead power transmission equipment), and the organic insulator 1 is attached to the tower while still wrapped in the protective cover 10 (step S2, organic insulator attachment process).
This process is performed in the same manner as the process of attaching normal insulators (organic insulators) to a steel tower, but it is performed while the organic insulator 1 is still wrapped in the protective cover 10.

That is, in this embodiment, as shown in Figures 7 and 8, for example, while the organic insulator 1 is still wrapped in the protective cover 10 (i.e., the protective cover 10 is not cut open by the pulling string 12), a terminal fitting 4A on one end of the organic insulator 1 exposed from the protective cover 10 is attached to an attachment location of the cross arm portion 21 of the tower 20, and an electric wire 22 is attached to the exposed terminal fitting 4B on the other end of the organic insulator 1.
In Fig. 8, reference numeral 23 denotes a jumper wire, and reference numeral 24 denotes a retaining clamp. Also, in Fig. 7 and Fig. 8, illustration of members such as an arcing horn is omitted.

For example, a worker may walk on the organic insulator 1 while attaching the organic insulator 1 to the tower 20. In this embodiment, the organic insulator 1 is covered with the protective cover 10 even during the attachment work of the organic insulator 1 as described above.
Therefore, even if a worker walks on the organic insulator 1, it is possible to reliably prevent the organic insulator 1 from becoming dirty or damaged.

Next, in the method for installing organic insulators according to this embodiment, the protective cover 10 is cut open from the terminal fitting 4A side on one end of the organic insulator 1 or the terminal fitting 4B side on the other end, and the protective cover 10 is removed from the organic insulator 1 installed on the tower 20 (step S3, protective cover removal process).
6, by pulling the pulling string 12 from the terminal metal fitting 4A side on one end side of the organic insulator 1, the protective cover 10 can be cut open from the terminal metal fitting 4B side on the other end side in a direction substantially parallel to the central axis of the internal organic insulator 1. Therefore, the protective cover 10 can be reliably removed from the organic insulator 1 installed on the tower 20.

6 to 8, if the pulling cord 12 is pulled out from the protective cover 10 to the terminal metal fitting 4A side, which is one end of the terminal metal fittings 4A and 4B of the organic insulator 1 and is attached to the cross arm 21 of the tower 20, a worker can stand on the cross arm 21 and pull the pulling cord 12 in a stable position. This allows the removal of the protective cover 10 to be performed safely.
Furthermore, since the protective cover 10 can be removed from the organic insulator 1 simply by pulling the pulling string 12, the task of removing the protective cover 10 can be easily performed.

As described above, according to the organic insulator installation method, organic insulator 1, and protective cover 10 of this embodiment, when the organic insulator 1 is installed on overhead power transmission equipment (such as a tower 20), even if the organic insulator 1 is placed near the overhead power transmission equipment in advance in the organic insulator preparation process (step S1), it is possible to prevent the organic insulator 1 from being eaten by birds and animals because the organic insulator 1 is wrapped in the protective cover 10.
Furthermore, since the organic insulator 1 is covered with the protective cover 10 even during installation of the organic insulator 1 on the overhead power transmission equipment, the organic insulator 1 can be prevented from becoming dirty or damaged even if a worker walks on the organic insulator 1.

As a result, it is possible to accurately prevent problems such as the organic insulator 1 being damaged or unable to perform its intended function in terms of insulation, etc., when it is installed on overhead power transmission equipment (such as a steel tower 20), and it becomes possible to properly install the organic insulator 1 on the overhead power transmission equipment.

It goes without saying that the present invention is not limited to the above-described embodiments, and can be modified as appropriate without departing from the spirit of the present invention.

For example, as described above, in the case where a string (not shown) is attached to each end of the protective cover 10 and the string is used to tie the terminal fittings 4A, 4B at both ends of the organic insulator 1, thereby sealing both ends of the tubular protective cover 10, it is possible to configure the organic insulator 1 to be attached to an overhead power transmission facility such as a tower 20 as described above, and then to untie the string before removing the protective cover 10 from the organic insulator 1.
Furthermore, when both ends of protective cover 10 are sealed by tying, welding, gluing, or the like, it is also possible to configure it so that when protective cover 10 is cut open by pulling pull string 12 in the protective cover removal process (step S3), the tying is loosened or the welding, adhesive, etc. comes off, so that both ends of protective cover 10 are automatically opened.

1 Organic insulator 2 Core 3 Outer sheath 4A Terminal fitting on one end 4B Terminal fitting on the other end 10 Protective cover 12 Pull cord 20 Steel tower (overhead power transmission equipment)
21 Bracket part (attachment point)
22 Electric wire

Claims (3)

an organic insulator preparation process for preparing an organic insulator wrapped in a protective cover in the vicinity of an overhead power transmission facility;
an organic insulator installation process for lifting the organic insulator to an installation location of the overhead power transmission equipment, installing a terminal fitting on one end side of the organic insulator exposed from the protective cover to the installation location while the organic insulator is still wrapped in the protective cover, and attaching an electric wire to the terminal fitting on the other end side of the organic insulator that is exposed, thereby installing the organic insulator wrapped in the protective cover to the overhead power transmission equipment;
a protective cover removing step of cutting the protective cover from a terminal fitting side on the one end side or a terminal fitting side on the other end side of the organic insulator to remove the protective cover from the organic insulator installed in the overhead power transmission equipment;
A method for installing an organic insulator comprising the steps of: The method for installing an organic insulator according to claim 1, characterized in that in the protective cover removal process, a pulling string attached to the protective cover is pulled to cut open the protective cover substantially parallel to the central axis of the organic insulator inside. The method for installing an organic insulator according to claim 2, characterized in that the tension cord is pulled out from the protective cover to the terminal fitting side of the one end of the organic insulator.

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