JP2000235876A - Insulating cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure a creeping distance of an insulating cover. SOLUTION: Downside parts of half cut pieces 22a, 22b constituting an insulating cover 10 are joined with a bolt and a nut made of a synthetic resin, and upside parts are joined by being sandwiched by a lock pipe 90. Because the creeping distance upward from a live part (an aluminum pipe 100 and support metal fittings 104) is a distance from a transverse swell part 22 through an upside flat part 32 and a flange part 34 to an axial opening 92 of the lock pipe 90, the creeping distance becomes much longer than that of a structure in which a bolt hole or the like is provided on the upside flat part 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention belongs to the technical field of insulating covers.

[0002]

2. Description of the Related Art In high voltage power transmission, a conductive pipe such as aluminum is sometimes used as a conductive material. The pipe as the conductive material is supported at an appropriate position.Specifically, a structure in which a support bracket is attached to an appropriate position of the pipe, the support bracket is supported by an insulator, and the insulator is supported by a post or the like. Normal.

[0003] In such a supporting portion, the pipe side (charged portion) and the support side are insulated by an insulator. For example, if floating substances in the air such as bird droppings, dust, and dust adhere to the insulator, the dirt causes the insulation. There is a possibility that the charging part and the support side may be short-circuited (ground fault) due to impaired performance. Therefore, an insulating cover is used to protect the supporting portion from airborne substances such as bird droppings, dust, and dust.

[0004] As a conventional insulating cover, for example, as disclosed in Japanese Utility Model Publication No. 4-6129 and Japanese Utility Model Publication No. 4-6130, a pair of halves each having a bulging portion along the outer shape of a charging unit are disclosed. Are joined together with their bulging portions facing the concave side.

[0005]

A conventional insulating cover is:
When joining the halves, the flat plates facing each other were connected with clamp buttons or synthetic resin bolts, etc., so the flat plates were provided with holes through which the clamp buttons and bolts were inserted. I was

However, if a bolt hole or the like is provided in the flat plate portion, the creepage distance is defined by the hole, making it difficult to secure a sufficient creepage distance. Of course, if the flat part is lengthened up and down and bolt holes etc. are provided at its ends, the creepage distance can be lengthened, but this will increase the size of the insulating cover and increase the wind pressure received by the flat part. There was an inconvenience.

Also, since flying objects such as bird droppings, dust and dust adhere to the upper side of the insulating cover, it is important to secure the creepage distance especially at the upper side.
An object of the present invention is to secure a sufficient creepage distance particularly in an upper portion of an insulating cover.

[0008]

According to a first aspect of the present invention, there is provided an insulating cover for covering a connecting portion between a pipe as a conductive material and an insulator supporting the pipe. A T-shaped bulging portion comprising a semi-cylindrical lateral bulging portion extending in the axial direction of the pipe and a vertical bulging portion extending in the axial direction of the insulator; A pair of synthetic resin halves each including a lower flat plate portion provided on the side of the vertical bulging portion of the portion and an upper flat plate portion provided on the side of the horizontal bulging portion opposite to the lower flat plate portion. The split body, the lower joining means made of synthetic resin for joining the lower flat plate portions of the pair of half bodies, and the pair of half bodies facing each other with the concave sides of the bulging portions facing each other. When the lower flat plate portion and the upper flat plate portion are brought into contact with each other, an axial opening having a width matching the joining thickness of both upper flat plate portions is formed. A lock pipe made of synthetic resin, and the pair of halves face each other with the concave sides of the bulging portions facing each other, and the lower flat plate portions are joined to each other by the lower joining means. The upper flat plate portions are brought into contact with each other and joined by sandwiching them at the axial opening of the lock pipe.

In other words, the joining of the upper flat plate portions is only required to be brought into contact with each other and sandwiched by the axial opening of the lock pipe, so that the work is simple and the labor for mounting is reduced. Note that, in order to sandwich the upper flat plates with the axial opening of the lock pipe, the end of the upper flat plate is inserted into one end of the axial opening, and then the lock pipe is moved in the axial direction. Good.

Since it is not necessary to provide a bolt hole or the like for joining the upper flat plate portions, the creepage distance is not defined by such a hole. Moreover, since the creepage distance is from the upper flat plate portion to the lock pipe, the creepage distance can be made longer than when only the upper flat plate portion is provided.

According to a second aspect of the present invention, in the insulating cover according to the first aspect, a flange portion is provided extending from an upper edge of the upper flat plate portion in a direction perpendicular to the upper flat plate portion. The radial displacement of the lock pipe is prevented by the contact with the flange portion, and the lock pipe is stabilized. By providing this flange portion, the creepage distance is further increased.

According to a third aspect of the present invention, there is provided the insulating cover according to the first or second aspect, further comprising a pair of synthetic resin extension halves provided with a semi-cylindrical extension bulging part along the axial direction of the pipe. Are joined together with the concave sides of the extended bulging portions facing each other to form an extended portion, and the extended portion is provided as an extension of the cylindrical portion formed by the lateral bulged portion.
The pipe can be covered not only near the insulator but also on both sides. Therefore, the protection effect by the insulating cover can be further improved.

According to a fourth aspect of the present invention, there is provided the insulating cover according to the third aspect, wherein the extension half is provided with an extended lower plate portion provided below the extended bulging portion; An extended upper plate portion provided above the bulging portion, and an extended flange portion extending from an upper edge of the extended upper plate portion in a direction perpendicular to the extended upper plate portion are provided. When the extension halves are joined to each other to form an extension, the extension upper plate portions are sandwiched between the axial openings of the lock pipe in a state where they are in contact with each other. That is, the half body and the extension half body can be joined with one lock pipe, and the mounting of the insulating cover is simple and the number of parts is small.

[0014]

Next, embodiments of the present invention will be described with reference to examples.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG.
Reference numeral 0 denotes a main body 20, a left extension 50, a right extension 70, and a lock pipe 90, and an aluminum pipe (hereinafter, referred to as an aluminum pipe) 100 and an insulator 102 as conductive materials.
Attached to the connection. The aluminum pipe 100
Is supported by the insulator 102 via a support fitting 104, and the lower end of the insulator 102 is held by a support (not shown). The main body 20, the left extension 50, the right extension 70, and the lock pipe 90 are all made of a transparent synthetic resin.

As shown in FIG. 2, the main body 20 comprises a pair of halves 21a and 21b.
b has a T-shaped bulging portion 26 in which a semi-cylindrical lateral bulging portion 22 extending in the axial direction of the aluminum pipe 100 and a vertical bulging portion 24 extending in the axial direction of the insulator 102 are arranged in series. I have.
The horizontal bulging portion 22 includes a central box-like portion 22a and semi-cylindrical portions 22b on both sides, and the vertical bulging portion 2 is formed by the box-like portion 22a.
4 and consecutive.

On the left and right sides of the vertical bulging portion 24, supporters 28a,
28b are continuously provided, and the horizontal bulging portion 22 and the vertical bulging portion 24 are provided.
Are provided with left and right lower flat plate portions 30a, 30b. Further, the lower flat plate portions 30a, 30b are provided with bolt holes 31, 33 for inserting a synthetic resin bolt (not shown) corresponding to the lower joining means, and the bolt is inserted here. And screwed into a nut (not shown) made of a synthetic resin.
a and 30b can be joined facing each other.

On the other hand, an upper flat plate portion 32 is provided above the lateral bulging portion 22, and a flange portion 34 extends from an upper edge thereof in a direction perpendicular to the upper flat plate portion 32. In addition, above and below the horizontal bulging portion 22, an insertion portion 35 which is a step with respect to the upper flat plate portion 32 and the lower flat plate portions 30a and 30b.
a, 35b, 37a and 37b are provided, and FIG.
As shown in (c), when the half bodies 21a, 21b are joined, the space between the insertion portions 35a, 35b and the insertion portions 37a,
There is a gap between 37b. This gap is formed by a half body 21a,
21b is used to connect the left extension 50 and the right extension 70.

The upper flat plate portion 32 and the flange portion 34 are inserted through the lock pipe 90 as shown in FIG.
As shown in FIG. 3, the lock pipe 90 is provided with an axial opening 92 formed by cutting a peripheral wall along the axial direction from one end to the other. The width A of the axial opening 92
Is slightly smaller than twice the thickness of the upper flat plate portion 32, and in the state shown in FIG.
2, 32 are pinched by elastic force. Further, the distance between the edges of the flange portions 34, 34 in a state where the upper flat plate portions 32, 32 are joined to each other is less than the inner diameter of the lock pipe 90, and does not hinder the elastic deformation of the lock pipe 90.

As is apparent from FIG. 2D, the charged part (the aluminum pipe 100 and the support fitting 104)
The creepage distance from the upper side to the horizontal swelling portion 22 to the upper flat plate portion 3
2 to flange portion 34 to axial opening 9 of lock pipe 90
Since the distance is 2, the creepage distance is much longer than in a configuration in which a bolt hole or the like is provided in the upper flat plate portion 32.

As shown in FIG. 2, the support 40 is inserted from the vertically bulging portion 24 to the support receivers 28a and 28b. The support member 40 includes an arc portion 42 and bar portions 44 on both sides thereof.
Are arranged facing each other,
They have a structure in which they are fastened with bolts 48a and nuts 48b. The support member 40 is formed by the arc portions 42, 42.
With the constricted portion 2 sandwiched, the bolt is tightened as shown in FIG. Then, both ends of the support 40 attached to the insulator 102 are penetrated and supported by the support receivers 28a and 28b of the main body 20, respectively, so that the support 40 supports the insulating cover 10. Since the structure is such that the insulating cover 10 is supported by the supporting member 40 attached to the insulator 102, an appropriate gap can be secured between the insulating cover 10 and the charging section. In addition, it is possible to prevent the position of the insulating cover 10 from shifting due to wind or the like.

The left extension 50 and the right extension 70 have a first extension half 52 and a second extension half (shown as mirror images of the extension half 52, respectively) shown in FIG. Are omitted, and the description is represented by the extended half body 52). The extension half 52 has a semi-cylindrical extension bulge 54 along the axial direction of the aluminum pipe 100. One end of the extended bulging portion 54 (the end that becomes the main body portion 20 when mounted as shown in FIG. 1) has a shape cut along the radial direction, and the other narrowed end portion 56 has a hemispherical shape. It has a shape reduced in planar shape and is cut along two surfaces (in this embodiment, 55 ° inclination) inclined with respect to the axis of the semi-cylinder, and is formed at a joint between the two cut surfaces. Has a corner. This corner is an extension half 5
2 is set so that when it is put on the aluminum pipe 100, it comes into contact with the surface of the aluminum pipe 100.

Since the aperture end 56 has such a shape,
The radius of the opening can be changed by changing the cutting position. Therefore, the extended bulging portion 54 is manufactured in a size applicable to the aluminum pipe 100 having a large diameter, and the cutting position and the cutting direction of the drawn end portion 56 are selected according to the diameter of the aluminum pipe 100 to be actually mounted. Thus, the same extended bulging portion 54 can be attached to the aluminum pipes 100 having various diameters. That is, it is not necessary to manufacture the extended bulging portions 54 having different dimensions for each diameter of the aluminum pipe 100. Moreover,
When the extension half body 52 is put on the aluminum pipe 100,
Since the corners come into contact with the surface of the aluminum pipe 100, the radial displacement of the extension half body 52 (eg, swaying due to wind)
Can be prevented.

An extended lower flat plate portion 57 is provided below the extended bulging portion 54 and has bolt holes 58a to 58 for inserting synthetic resin bolts (not shown).
d is provided, and the extended lower plate portions 57 can be joined to face each other by inserting a bolt and screwing it into a nut (not shown) also made of a synthetic resin. The bolt hole 58a is provided in the insertion portion 37 of the half body 21a, 21b.
a, 37b are provided at positions matching the bolt holes 33 provided.

An extended upper plate portion 60 is provided above the extended bulging portion 54, and an extended flange portion 62 extends from an upper edge thereof in a direction perpendicular to the extended upper plate portion 60. . Also, the throttle end 56 of the extended upper flat plate portion 60
A bolt hole 64 for inserting a synthetic resin bolt (not shown) is provided on the side, and the bolt is inserted here and screwed with a synthetic resin nut (not shown). The extended upper flat plate portions 60 can be joined to face each other.

Extended upper flat plate portion 60 and extended flange portion 6
2 is inserted into the lock pipe 90 in the same manner as the upper plate portion 32 and the flange portion 34 (see FIG. 2D). At that time, the lock pipe 90 sandwiches the extended upper flat plate portion 60 by its elastic force at the axial opening 92. In addition, the distance between the edges of the extended flange portion 62 in a state where the extended upper plate portions 60 are joined to each other is smaller than the inner diameter of the lock pipe 90, and does not hinder the elastic deformation of the lock pipe 90.

The procedure for mounting the insulating cover 10 having the above-described configuration is as follows. First, the support 40 is attached to the constricted portion of the insulator 102. Next, a half body 21a is arranged on one side of the charging unit, and a half body 21b is arranged on the other side, and the respective support holders 28a and 28b are aligned with both ends of the support 40, and the half body 21a , 21b are opposed to each other, and bolts are inserted into the bolt holes 31 and nuts are screwed into the bolt holes 31 so that the opposed lower flat plate portions 30a, 3b are opposed to each other.
0b. As a result, as shown in FIG.
The support 40 is held between the half bodies 21a and 21b.

Subsequently, the extension half body 52 and the extension half body to be paired face each other, and one end thereof (the end opposite to the throttle end portion 56) is inserted into the insertion portion 35a, 35b and into the gaps between the insertion portions 37a, 37b. The width of these gaps is set to be approximately twice the thickness of the extension half 52. Then, the bolt holes 33 are aligned with the bolt holes 58a, and the bolt holes are tightened.
d is also bolted. Thus, for example, the left extension 50 is attached, and the other right extension 70 is attached in the same manner.

Further, the left extension 50 or the right extension 70
The bolt hole 64 on the upper side of the throttle end 56 is also bolted, and the lock pipe 9 is inserted from the bolt hole 64 side where the bolt is not bolted.
0, the upper flat plate portion 32, the flange portion 34, the extended upper flat plate portion 60, and the extended flange portion 6
Fit to 2. As a result, the upper flat plate portion 32 (more precisely, the insertion portions 35a and 35b) is sandwiched by the axial opening 92 of the lock pipe 90, so that the main body portion 20, the left extension portion 5
The upper portions of the zero and right extensions 70 are securely joined. Finally, when the remaining bolt holes 64 are bolted, the bolts and nuts of both bolt holes 64 prevent the lock pipe 90 from coming off, so that the mounting position of the lock pipe 90 does not shift or fall off.

By closing the end of the lock pipe 90 with a rubber stopper or the like, small animals such as insects can be prevented from entering the inside of the lock pipe 90. Then, birds or the like aiming at the small animals in the lock pipes 90 are made of aluminum pipes 100.
Also, it is possible to prevent a ground fault due to contact with.

As described above, the insulating cover 10 of this embodiment is
Since the lock pipe 90 is used to hold the upper joint, a sufficient creepage distance can be ensured despite its limited dimensions. Further, since the main body portion 20 and the extension portions 50 and 70 are collectively locked by one lock pipe 90, the number of components is small and the number of required work steps can be reduced.

Since the support 40 is used for mounting the insulating cover 10, an appropriate distance can be secured between the charging section and the insulating cover 10, and the mounting of the insulating cover 10 is stabilized. Extension 5
Since the aperture ends 56 of 0 and 70 are squeezed hemispherically,
The radius of the opening can be changed by selecting the cutting position of the throttle end 56, so that it is not necessary to manufacture the extended bulging portion 54 having a different size for each diameter of the aluminum pipe 100.

Main body 20, left extension 50, right extension 70
Since the lock pipe 90 and the lock pipe 90 are both made of a transparent synthetic resin, the situation inside the insulating cover 10 can be easily grasped. Prevention of attachment of dirt such as bird droppings, dust and dust, and prevention of ground faults caused by birds are also ensured. (Modification) When covering the end portion 103 of the aluminum pipe 100, an extension 97 having a closed end 95 can be used as shown in FIG. The provision of the closed end portion 95 can prevent birds and the like from entering from the end portion 103 side.

Although the embodiment of the present invention has been described above, the present invention is not limited to such an example, and it goes without saying that various embodiments can be made without departing from the spirit of the present invention.

[Brief description of the drawings]

FIG. 1 is a front view of a state where an insulating cover according to an embodiment is mounted.

2 (a) is a front view, FIG. 2 (b) is a cross-sectional view of the vicinity of a support, and FIG. 2 (c) is a side view. FIG. 2D is an explanatory view of a state where the lock pipe has been inserted.

3A and 3B are explanatory diagrams of a lock pipe of an insulating cover according to an embodiment, wherein FIG. 3A is a side view and FIG. 3B is a bottom view.

4A and 4B are explanatory views of an extended half body of an insulating cover according to an embodiment. FIG. 4A is a plan view, FIG. 4B is a front view, and FIG.
(C) is a side view.

FIG. 5 is a front view of a modified example of an insulating cover.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Insulation cover, 20 ... Body part, 21a, 21b ... Half body, 22 ... Horizontal bulging part, 24 ... Vertical bulging part, 26 ... Bulging part, 30a, 30b ... Lower flat plate part, 32 ... Upper side Flat part,
34 ... Flange part, 50 ... Left extension part, 52 ... Extension half body, 54 ... Extension bulging part, 57 ... Extension lower flat plate part, 60 ...
Extension upper flat plate portion, 62 ... Extension flange portion, 70 ... Right extension portion, 90 ... Lock pipe, 92 ... Axial opening, 100 ...
Aluminum pipe (conductive material), 102 ... insulator.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5G333 AA09 AA11 AB01 AB22 CA01 CB18 CC09 DA03 EA01 5G367 BA03 BB04 BB11 BB14 5G375 AA01 BA16 BB81 CA02 CA13 CB06 CD17 DB32 DB38 EA02 EA17

Claims (4)

[Claims] 1. An insulating cover for covering a connecting portion between a pipe as a conductive material and an insulator supporting the pipe, wherein the insulator has a semi-cylindrical laterally bulging portion along an axial direction of the pipe. A T-shaped bulging portion having a series of vertical bulging portions along the axial direction; a lower flat plate portion provided on the vertical bulging portion side of the horizontal bulging portion; A pair of synthetic resin halves having an upper flat plate provided on the opposite side to the lower flat plate; and a synthetic resin lower half joining the lower flat plates of the pair of halves together. Side joining means, joining the upper and lower flat plate portions when the lower flat plate portions and the upper flat plate portions are brought into contact with each other with the concave sides of the bulging portions of the pair of half bodies facing each other. A lock pipe made of a synthetic resin having an axial opening having a width matching the thickness, wherein the pair of half-pieces are recessed from each other by the bulging portions. The lower flat plate portions are joined to each other by the lower joining means, and the upper flat plate portions are brought into contact with each other and joined by being sandwiched by an axial opening of the lock pipe. And insulation cover. 2. The insulating cover according to claim 1, further comprising a flange portion extending from an upper edge of the upper flat plate portion in a direction perpendicular to the upper flat plate portion. 3. The insulating cover according to claim 1, wherein a pair of synthetic resin extension halves having a semi-cylindrical extension portion extending along the axial direction of the pipe are connected to each other. An insulating cover, characterized in that an extension portion is formed by joining the concave portions of the projection portions facing each other to form an extension portion, and the extension portion is provided as an extension of a tubular portion formed by the lateral bulging portion. 4. The insulating cover according to claim 3, wherein the extension half-split body includes an extension lower flat plate portion provided below the extension bulge portion, and an extension lower plate portion provided above the extension bulge portion. And an extension flange portion extending from an upper edge of the extension upper plate portion in a direction perpendicular to the extension upper plate portion, and joining the pair of extension halves to each other. The insulating cover is characterized in that, when forming the extension portion, the extension upper flat plate portions are sandwiched between the axial openings of the lock pipe in a state where they are in contact with each other.