JPS6412057B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD This invention relates to a cylindrical cutout with an arrester.

BACKGROUND ART Conventionally, a so-called cylindrical cutout with a built-in arrester, in which the arrester is housed within the main body insulator, has been proposed as a cutout with an arrester.

However, in the case of a cylindrical cut-out with a built-in arrester, since the arrester is built into the main body insulator, it is difficult to replace only the arrester, and it is necessary to replace the entire cylindrical cut-out with a built-in arrester. Therefore, there was a problem in that the replacement work was time-consuming.

In addition, the cylindrical cut-out with a built-in arrester has a configuration in which the arrester storage section is arranged in parallel or perpendicularly to the fuse tube storage section within the main insulator, so a part of the circumferential side of the main insulator bulges out. It is necessary to create a special shape or increase the inner diameter of the main body insulator to increase the space in its storage section. Therefore, in the former case, it is difficult to manufacture the main insulator;
There is a problem of increased manufacturing costs. In the latter case, the main insulator becomes large and wasteful space is created in the hollow part of the main insulator.

Purpose The purpose of the present invention is to enable easy replacement of the arrester, to create a cylindrical cutout with an arrester without changing the shape of the main insulator of the conventional cylindrical cutout, and to use the arrester. To provide a cylindrical cutout which can be used without an arrester by attaching a protective cap made of an insulating material such as porcelain when the arrester is not used.

Embodiment Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS. 1 and 2. This cylindrical cut-out with an arrester is composed of a cut-out part A and an arrester part B which can be attached to and detached from the cut-out part A.

First of all, starting with the cut-out part A, 1 in the drawing is a cylindrical body insulator with an appropriate number of insulating folds formed on the outer circumferential surface. The lower part is divided into a mounting hole 3 and the lower part is divided into a fuse cylinder storage hole 4.

Reference numeral 5 denotes a cylindrical connecting conductor that is locked to the locking step 2 in the mounting hole 3 via a buffer plate 6 and a spring washer 7, the upper part of which is slightly spaced from the inner periphery of the mounting hole 3. The outer threaded portion 5a for attaching the arrester portion B is formed at the upper portion thereof to protrude beyond the upper end portion of the main body insulator 1.
The connecting conductor 5 is fixed by cementing filled in the mounting hole 3.

Numeral 8 is a bolt screwed onto the lower surface of the connecting conductor 5 through the locking step 2, and connects the connecting fitting 9 and the tube-shaped upper electrode 10 to the lower surface of the locking step 2 through the buffer plate 9a. It's stuck.

Reference numeral 11 denotes a power supply side outlet wire whose inner end is connected to the connection fitting 9, and is led out to the outside via a rubber mold cone 13 from an insertion hole 12 opened on the outer periphery of the upper part of the main body insulator 1. Reference numeral 14 denotes a cylindrical lower electrode frame attached below the locking step 4b provided on the lower circumferential surface of the storage hole 4, and the upper end is locked to the locking step 4b, and the lower end peripheral portion is connected to the storage hole 4. It engages in a locking groove 4c carved on the circumferential surface. Reference numeral 15 denotes an electrode support plate 15 fitted to the inner periphery of the lower electrode frame 14.
A lower electrode is screwed to a, and 16 is a load side lead wire whose inner end is attached to the electrode support plate 15a,
Rubber mold cone 17 from the outer periphery of the lower part of the main body insulator 1
It is led out to the outside via.

Reference numeral 18 denotes a fuse tube attached to the upper electrode 10 and the lower electrode 15, the upper contact 18a of which is removably inserted into the upper electrode 10, and the lower contact 18b held in contact with the lower electrode 15. ing. Reference numeral 19 denotes a hook member adhesively fixed to the circumferential surface of the opening 4a of the storage hole 4, and the hook member 19 is tightly fitted to the tapered inner circumference of the hook member 19 by means of fasteners 19a provided at appropriate locations on the inner circumference. Lid 2
0 is removably locked. A string 21 connects a part of the hook member 19 and the sealing lid 20.

Incidentally, reference numeral 22 denotes a mounting fitting attached to the body of the main insulator 1, and is attached to an arm (not shown) of a utility pole.

Next, the arrester section B attached to the cut-out section A constructed as described above will be explained.

Reference numeral 24 denotes a cylindrical arrester storage insulator having a suitable number of insulating folds formed therein, and has arrester storage holes 25 penetrating through both upper and lower ends inside the insulator. 2
Reference numeral 6 denotes a locking step formed at the upper part of the arrester storage hole 25, and 25a is an opening whose diameter is enlarged to have a step part 25b at the lower part of the storage hole 25.

Reference numeral 27 denotes an arrester which is inserted and attached from below into the storage hole 25, and whose upper end is connected to a spacer 28,
A male threaded portion 30 is locked to the locking stepped portion via the packing 29 and protrudes from the earth side electrode 30 in the upper end portion.
A is fixed by screwing it to the base end of the ground connection terminal 40 which is locked to the upper end of the arrester storage insulator 24 via the locking step. And the same arrester 2
The end surface of the lower end portion 7 is made to substantially match the lower surface of the stepped portion 25b of the storage hole 25.

The arrester 27 of this embodiment is constructed as follows.

Reference numeral 31 denotes a cylindrical storage container made of fiber-reinforced plastic for the arrester 27, and a charging side electrode 32 is screwed into the opening at the lower end. Reference numeral 32a denotes a female threaded portion provided on the lower surface of the charging side electrode 32, which can be screwed into the male threaded portion of the cutout portion A. 33
is a lid made of fiber-reinforced plastic screwed onto the opening at the upper end of the storage container 31;
The plate-shaped earth side electrode 30 is adhesively fixed to the lower surface of the electrode 30, and a male threaded portion 30a is made to protrude upward from the center of the electrode 30 through the lid body 33.

Reference numeral 34 denotes a characteristic element having non-linear resistance, such as a zinc oxide element, which is disposed in the storage container 31 so as to be in direct contact with the charging side electrode 32, and is stacked in a suitable number of layers. And the top characteristic element 3
A plate-shaped pressure contact electrode 35 is brought into contact with the upper surface of the storage container 31 with a slight gap from the inner periphery of the storage container 31 .

36 is a flexible conductor whose both ends are connected to the pressure contact electrode 35 and the earth side electrode 30, and 37 is a compression spring interposed between the pressure contact electrode 35 and the earth side electrode 30, element 34
is biased toward the charging side electrode 32.

The arrester 27 is composed of the earth side electrode 30, the storage container 31, the charging side electrode 32, the characteristic element 34, the pressure contact electrode 35, the flexible conductor 36, and the compression spring 37.

Reference numeral 38 denotes a synthetic resin cover fixed to the base end of the earth connection terminal 40 with adhesive or the like and locked through a gasket 39 at the upper end of the cylindrical insulator 24, and which is attached to the upper end of the arrester storage insulator 24. When the male threaded portion 30a of the earth side electrode 30 is screwed onto the earth connection terminal 40, the gasket 39
The upper end of the arrester storage insulator 24 is kept watertight through the arrester housing insulator 24.

Reference numeral 41 denotes a presser piece whose base end is inserted into the upper end of the earth connection terminal 40 and whose tip is bent into an inverted U shape. As shown in FIG. 1, 42 is a screw for connecting a ground wire that passes through the tip of the holding piece 41 and is inserted and screwed into the side of the ground connection terminal 40, and is inserted into the upper end of the ground connection terminal 40. The tip of the holding piece 41 contacts a ground wire (not shown) through the base end of the holding piece 41, and is screwed into the connection terminal 40, so that the ground wire can be crimped into the ground connection terminal 40. . The end of the ground wire 47 is attached to the mounting bracket 22 or the like via a protective cover (not shown) made of an insulating material that covers the ground connection terminal 40 and the cover 38.

As shown in FIG. 1, the arrester part B configured as described above connects the female threaded part 32a of the charging side electrode 32 to the male threaded part 5a connected to the upper electrode 10 of the cutout part A, and connects the gasket 43, the receiving plate 44, and the flat part. They can be screwed together via a washer 45 and a spring washer 46.

The cutout configured as described above protects the power distribution equipment connected to the load-side outlet wire 16 from shock waves such as induced lightning surges caused by lightning strikes. Furthermore, since the arrester part B is removably screwed onto the cut-out part A, the arrester part B can be easily replaced.

Furthermore, since the arrester section B and the cutout section A are efficiently arranged vertically, wasted space is eliminated from within the main body 1, and the main body 1 can be made smaller and lighter.

In addition, when the arrester section B is not used, the cutout section A can be used as a standalone unit by screwing a porcelain protective cap C that covers the upper end of the main body 1 of the cutout section A onto the male threaded section 5a as shown in Fig. 3. Become.

Note that this invention is not limited to the above-mentioned embodiments, and may deviate from the spirit of the invention, such as by adopting a valve resistance type arrester that combines a series gap with a characteristic element made of a silicon carbide element in addition to zinc oxide as an arrester. It is also possible to arbitrarily change it as long as it does not.

Effects As detailed above, the present invention has a fuse cylinder storage hole, and an upper electrode electrically connected to the power supply side lead wire is fixedly installed in the upper part of the fuse cylinder storage hole.
A lower electrode electrically connected to the load side lead wire is fixed at the lower part of the fuse cylinder storage hole, and above the upper electrode is electrically connected to the upper electrode and protrudes from the upper end of the main body insulator. a cylindrical cut-out body insulator to which a connecting conductor is fixed, and an arrester housing hole, in which a female threaded portion that can be screwed into the male threaded portion protruding from the connecting conductor is provided on the lower surface of the arrester housing hole; and a charging side electrode electrically connected to the upper electrode of the main body insulator, and a grounding side electrode electrically connected to the grounding terminal, and housing and fixing an arrester having a non-linear resistance element such as zinc oxide. and an arrester storage insulator, the arrester storage insulator being removable at the upper part of the main body insulator through a male threaded part protruding from the connecting conductor of the main body insulator and a female threaded part provided on the charging side electrode of the arrester storage insulator. The arrester can be easily replaced by simply replacing the arrester storage insulator, which has integrated the arrester into a unit.Also, the arrester can be replaced without changing the shape of the conventional cut-out main body insulator. Furthermore, since the arrester storage insulator and the main body insulator are efficiently arranged above and below, wasted space can be eliminated from the pillar space.Furthermore, when the arrester is not used, a protective cap made of insulating material such as porcelain can be used. It has the effect of being able to be used as a standalone cutout by attaching it.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment embodying the present invention, and FIG. 2 is a side view showing a cut-out portion with a protective cap attached. Main body insulator...1, Fuse tube storage hole...4, Connecting conductor...5, Male thread part...5a, Upper electrode...
10, Power supply side lead wire...11, Lower electrode...1
5. Load side lead wire...16. Fuse pipe...1
8. Arrester storage insulator...24, Arrester storage hole...25, Arrester...27, Earth side electrode...
30, Charging side electrode...32, Female thread part...32
a. Cutout section...A. Arrester section...B.

Claims (1)

[Claims] 1. A fuse cylinder storage hole is provided, and an upper electrode electrically connected to the power supply side output wire is fixedly installed in the upper part of the fuse cylinder storage hole, and an upper electrode is fixedly installed in the lower part of the fuse cylinder storage hole. A connecting conductor is provided with a lower electrode that is electrically connected to the load side lead wire, and above the upper electrode that has a male thread that is electrically connected to the upper electrode and that protrudes beyond the upper end of the main body insulator. The main body insulator has a cylindrical cut-out main body insulator fixed thereto, and an arrester storage hole, and the arrester storage hole has a female threaded portion on the lower surface that can be screwed with a male threaded portion protruding from the connecting conductor, and the main body insulator has An arrester storage insulator which has a charging side electrode electrically connected to the upper electrode and a grounding side electrode electrically connected to the grounding terminal, and houses and fixes an arrester having a non-linear resistance element such as zinc oxide. The arrester storage insulator is removably attached to the upper part of the main body insulator via a male threaded portion protruding from the connecting conductor of the main body insulator and a female threaded portion provided on the charging side electrode of the arrester storage insulator. Cylindrical cut-out with arrester.