JP4376384B2 - Insulation cover for overhead distribution lines - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an insulation cover for an overhead distribution line, and more particularly to an insulation cover used for repairing an insulation coating through-hole generated by using a needle electrode type clamp at the time of bypass construction of an overhead distribution line.
[0002]
[Prior art]
Conventionally, this type overhead distribution lines insulating cover - as an example of, are known as actual fair 6-31613 JP, which will be described with reference to FIGS.
That is, in the figure, 51 is an insulating cover, 52 is a cylindrical synthetic resin cover body having a slight elasticity constituting the insulating cover 51, and the cover body 52 is expanded outward. A notch 53 having a required width is formed along the longitudinal direction of the notch. 54 is an insulating putty material applied and formed along the inner peripheral surface of the cover main body 52, and the inner diameter formed by the putty material 54 is required to be slightly smaller than the outer diameter of the overhead distribution line A. Is formed. 55 is a mounting portion extending in a taper shape at both ends of the cover main body 52 so as to be forcibly fitted and attached to the overhead distribution line A, and 56 is detachably attached to the outer peripheral surface of the cover main body 52. It is a knob piece attached to. In addition, B is a through hole generated in the overhead distribution line A by using a needle electrode type clamp, and C is an indirect live tool such as a Yatsuko.
[0003]
Then, the please allowed to mount a conventional insulated cover -51 configured as described above to overhead distribution lines A, first, as shown in FIG. 5, while allowed gripping the grip piece 56 by indirect hot tool C, switching The notch 53 part is applied to the overhead distribution line A, and after making contact with the through hole B as the center, the part is further pressed. Then, the cover body 52 and the mounting portion 55 are forcibly expanded outwardly against the elastic force along the notch 53, and are externally fitted to the overhead distribution line A, and automatically by the elastic force. It is to be restored and attached in a pinched form.
[0004]
[Problems to be solved by the invention]
By the way, the above conventional example can be mounted by an extremely simple operation of pressing the knob piece 56 against the overhead distribution line A while holding it with the indirect hot wire tool C, but has the following drawbacks. .
First, since the insulating cover 51 itself is elastically attached to the overhead power distribution line A, the holding force is inevitably weak. For this reason, at the time of mounting, the pressure of the putty material 54 against the overhead distribution line A is weak and cannot be filled up to the inside of the through hole B, and as a result, a sufficient waterproof effect cannot be obtained. .
Secondly, as described above, the insulating cover 51 is attached by using the elastic force of the insulating cover 51 itself. Therefore, when the insulating cover 51 is used for a long period of time, the elastic force is weakened as the insulating cover 51 deteriorates, and the waterproofing is achieved. It is easy to adversely affect the effect.
Third, when the overhead distribution line A is soft, such as a butyl rubber electric wire (PDB) for high-voltage pulling down or an EP rubber electric wire (PDP) for high-voltage pulling down, the insulating layer is insulated because the covering layer is a buffer material. It is difficult to apply the elastic force of the cover 51, and as a result, the attachment tends to be insufficient.
[0005]
The present invention is intended to solve the conventional problems at once, and to provide an insulating cover that can always be securely attached regardless of hardness or softness of the coating layer of the overhead power distribution line and can effectively exert the waterproof effect. It is.
[0006]
[Means for Solving the Problems]
That is, the present invention is provided with a seal material along the inner peripheral surface of a substantially arc-shaped cover body having a required length that is freely fitted to an overhead distribution line, and the seal material. A belt-like fastening piece that can be engaged with the other side is formed on one side of the cover body, and the overhead distribution line is press-fitted into both ends of the cover body. wherein the holding portion of the cross-section a substantially circular arc which is smaller in diameter shape than the outer diameter of the overhead distribution lines, which are formed so allowed to hold Te, overhead distribution lines insulating cover - it is an gist.
[0007]
The insulating cover according to the present invention is brought into contact with a required overhead distribution line around the through hole via a seal material, and is firmly tightened with a fastening piece while press-fitting the holding portions at both ends. Regardless of whether it is hard or soft, it is possible not only to ensure that the seal material is always filled in the through hole, but also to effectively exert a waterproof effect over a long period of time.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described based on an example shown in the drawings.
1 to 3 show an embodiment of the present invention, in which 1a is an insulating cover, and 2a is a substantially semicircular cross section having a required length constituting the insulating cover-1a. The cover main body 2a has an inner diameter that can be freely fitted to the overhead distribution line A. 3 is a seal material provided at a required thickness along the inner peripheral surface of the cover main body 2a. The seal material 3 has an inner diameter slightly smaller than the outer diameter of the overhead distribution line A. At the same time, it is made of a material such as an adhesive seal material made of butyl rubber, silicon rubber, or the like, or an elastic seal material made of an independent foaming sponge or the like. 4a is a wide belt-like fastening piece formed so as to be foldable via a hinge 5a at one side center of the cover main body 2a so that the seal member 3 is fastened and brought into pressure contact with the overhead distribution line A, and 6a is the fastening member. An engagement hole formed at the free end of the piece 4a, 7a is an engagement piece formed on the other side of the cover body 2a to be engaged with the engagement hole 6a, and 8a is formed at both ends of the cover body 2a. Each of the holding portions 8a has a short semi-circular holding portion that is concentrically extended and has an inner diameter of the aerial distribution wire A so that the holding portion 8a can be forcibly fitted and attached to the aerial distribution wire A. The outer diameter is slightly smaller than the outer diameter.
[0009]
When the embodiment configured as described above is attached to the overhead distribution line A, first, the clamping piece 4a is applied to the overhead distribution line A while being held by the indirect hot wire tool C, and the through hole B is centered. (See FIG. 2). Next, the holding portions 8a at both ends are forcibly fitted and held on the overhead distribution line A, respectively, and the cover body 2a is prevented from floating in the axial direction and the circumferential direction of the overhead distribution line A. After that, the fastening piece 4a is bent and bent through the hinge 5a, and the overhead distribution wire A is pressed against the seal member 3 and the engagement hole 6a is engaged with and engaged with the engagement piece 7b. (See FIG. 3). At this time, the aerial distribution line A is pressed against the seal member 3 by tightening with the fastening piece 4a, so that the aerial distribution line A is always firmly and securely attached regardless of the hardness of the coating layer. As a result, not only can the sealing material 3 be reliably filled in the through-hole B to effectively exhibit the waterproof effect, but it can sufficiently withstand long-term use. .
[0010]
【The invention's effect】
According to the present invention, a seal material is provided along the inner peripheral surface of the substantially arc-shaped cover body having a required cross-section having a required length that can be freely fitted to the overhead power distribution line. A band-shaped fastening piece is formed on one side of the cover body so that the seal material can be pressed against the overhead power distribution line, and the both sides of the cover body are each aerial distribution. since the holding portion of the cross-section substantially circular arc shape so is than the outer diameter of the overhead distribution lines and small diameter shape allowed to hold the press-fitting the electric wire is formed, simply cover - conventional allowed to attached to clamping shape by the elastic force of the body itself Compared to the example, the holding parts at both ends are press-fitted and held in the overhead distribution line while being tightened by fastening the fastening pieces to the other side, regardless of the hardness of the overhead distribution line coating layer. In addition, make sure that it is securely attached and that the through hole is filled with a seal material for a long-term waterproof effect. Watari be those that can that allowed to hold.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a state in which the insulating cover-1a of the embodiment is attached to the overhead distribution line A.
FIG. 3 is a cross-sectional view showing a state in which the insulating cover-1a of the embodiment is attached to the overhead distribution line A.
FIG. 4 is an exploded perspective view showing a conventional example.
FIG. 5 is a cross-sectional view showing a state in which an insulating cover 51 of a conventional example is attached to the overhead distribution line A.
[Explanation of symbols]
1a Insulation cover
2a Cover body 3 Seal material 4a Tightening piece 6a Engagement hole 7a Engagement piece 8a Holding part A Overhead distribution line B Through hole

Claims (1)

A seal member is provided along the inner peripheral surface of the substantially arc-shaped cover body having a required length that can be freely fitted to the overhead distribution line, and the seal member is press-contacted to the overhead distribution line. allowed to order cover - on one side of the main body together with belt clamping pieces which are freely engaged in the other side is formed, cover - fictitious distribution so allowed to hold the press-fitting each overhead distribution lines at both ends of the body holding portion of the cross-section a substantially circular arc which is smaller in diameter shape than the outer diameter of the electric wire is formed, characterized by comprising, overhead distribution lines insulating cover -.

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