JPH06327110A - Conductor connection part of switch gear - Google Patents

Abstract

PURPOSE:To obtain a connection part which can connect box bodes easily by engaging the projecting part of a male-side bushing to the recessed part of the female side bushing while the edge part of a connection conductor is engaged to a through hole. CONSTITUTION:Male side bushings 3A and 3B where a conductor 5 is buried into the shaft center of a first insulation layer 4, a through hole where the edge part of the connection conductor 5 is engaged is formed at one side of the insulation layer 4, and a rejecting part is formed at the other side of the insulation layer 4 and male side bushings 7A and 7B where a center conductor 10 is buried at one side of the shaft center of a second insulation layer 11 provided at the outer wall of an electrical equipment housing container and a recessed part 11B for engaging the protruding part of the first insulation layer 4 to the other side of the insulation layer 11 are provided. Then, the protruding parts of the male side bushings 3A and 3B are engaged to the recessed part 11B of the male side bushings 7A and 7B while the edge part of the connection conductor 5 is engaged to the through hole, thus obtaining a connection part where box bodies 1B and 1D can be connected easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductor connecting portion of a switchgear for connecting a box between metal closing type switchgear boxes filled with an insulating gas with a cable.

[0002]

2. Description of the Related Art FIG. 5 shows a case in which a conductor connection portion 21 of a conventional switchgear is used for each box 1A, 1B, 1C,
1D, 1E, 1F, 1G, 1H, 1J is a perspective view showing a state where the ceiling plate is penetrated and connected by a cable 2.
FIG. 6 is an enlarged vertical cross-sectional view showing the connection process of the conductor connecting portion at the rear of the ceiling of the boxes 1B, 1D, 1E, and FIG.
6 shows a partially enlarged detailed view of FIG. 6.

In FIGS. 5, 6 and 7, the box 1B,
T-shaped bushings 23A, 23B and 23C shown in Japanese Patent Publication No. 60-160309 are respectively provided on the ceiling portions of 1D and 1E, and airtightly fixed through O-rings (not shown) attached to the ceiling plate. Has been done.

These T-shaped bushings 23A, 23B, 23C
In the outer periphery of the substantially T-shaped center conductor 25, an insulating layer 24 cast by epoxy resin is formed into a substantially T-shape, and the box body 1B,
A through hole 23b penetrating left and right in FIG. 6 is formed in a portion (hereinafter, referred to as a head) 23a protruding upward from the ceiling surfaces of 1D and 1E. A ground layer is provided on the outer periphery of the head 23a.
23c is formed.

In FIGS. 6 and 7, a cylindrical contactor 28 is inserted into the end of the core wire 2a of the cable 2 and the core wire 2
It is fixed by a wedge 28b inserted from the end face of a. A groove having a concave cross section is formed on the outer periphery of the contactor 28, and an annular contact plate 28a made of a strip-shaped conductive spring material is mounted in the groove.

At both ends of the cable 2, a substantially cylindrical stress cone 6 is inserted into an inner jacket 2b from which the outer jacket 2c has been removed. In the boxes 1D and 1E shown in FIG. It is inserted in 23b.

In the conductor connecting portion thus constructed, for example, when connecting the T-shaped bushings 23B and 23C penetrating the ceiling plates of the boxes 1D and 1E shown in FIG. First, the T-shaped bushing is used for the cable 2 in which the contactor 28 and the stress cone 6 are not attached.
Insert from the left side of 23A, move to the right as shown by arrow A, and project the tip to the right side of T-shaped bushing 23B.

The stress cone 6 is inserted into the inner cover 2b at the right end of the projected cable 2 as shown in FIG. 7, the contact 28 is inserted into the tip of the core wire 2a, and the wedge 28b is struck. Similarly, the stress cone 6 is attached to the inner cover 2b at the left end of the cable 2 which is left on the left side of the T-shaped bushing 23B as shown in FIG.
And symmetrically insert the contactor 28 and wedge 28
Knock b.

Next, move the cable 2 further to the right,
The contact 28 inserted in the right end of the cable 2 is a T-shaped bushing.
The through hole formed in the head 23a of the T-shaped bushing 23C by inserting the stress cone 6 into the head 25a of the center conductor 25 of 23C.
Insert it into 23b and tighten it with a fastener not shown.

Similarly, the stress cone 6 attached to the left side of the cable 2 is inserted into the through hole 26 of the head portion 23a of the T-shaped bushing 23B and is tightened with a tightening tool (not shown).

When connecting the cable 2 between the boxes 1B and 1D, similarly, the cable 2 is penetrated from the left side of the box 1B into the T-shaped bushing 23A, and the pair of stress cones 6 are symmetrically inserted and attached. After inserting the contact 28 into both ends, hitting the wedge 28b and inserting the contact plate 28a, the right end contact 28 is inserted into the T-shaped bushing 23B, and the left end contact 28 is inserted into the T-shaped bushing 23A. insert. Similarly, the stress cone 6 is inserted into the left and right T-shaped bushings 23A and 23B and tightened.

When the stress cone 6 is inserted into the through hole 23b of the head portion 23a, the outer circumference of the stress cone 6 and the inner circumference of the through hole 23b are cleaned with alcohol and silicone grease is applied. Right end of T type bushing 23C and T
A blind plug (not shown) is attached to the left end of the bushing 23A.

[0013]

However, in the conductor connecting portion thus configured, the box body 1E is provided on the right side of the box body 1E at the right end shown in FIG. 6 similarly to the box bodies 1B and 1C.
In the power receiving equipment in which the boxes connected to the T-shaped bushing 23C are continuously adjacent to each other for several faces, and the box at the right end is adjacent to the wall of the building, the T-shaped bushings of the boxes are connected. All the cables 2 must be moved to the right in order by penetrating the head 24 of the T-shaped bushing 23A provided in the ceiling of the leftmost box 1B shown in FIG.

Further, the stress cone 6 and the contact 28 are attached to the cable 2 and the wedge 28b,
Inserting the contact plate 28a and cleaning the inner circumference of the through hole 24a
Must be done on the top of each box.

Moreover, these operations are performed twice during the test at the manufacturing factory and at the installation site, and at the manufacturing factory, the connected cable connection portion must be disassembled for transportation to the installation location of the power receiving equipment. .

Therefore, an object of the present invention is to obtain a conductor connecting portion which can easily connect between boxes.

[0017]

According to a first aspect of the present invention, a conductor is embedded in a shaft center of a first insulating layer, and an end portion of a connecting conductor is fitted to one side of the first insulating layer. A male bushing having a hole formed therein and a protrusion formed on the other side of the first insulating layer, and a center on one side of the axis of the second insulating layer provided on the outer wall of the container accommodating the electric device The conductor is buried and the second
Is a conductor connecting portion of a switchgear including a female side bushing having a concave portion formed on the other side of the insulating layer to which the convex portion of the first insulating layer fits.

According to a second aspect of the present invention, a conductor is embedded in the shaft center of the first insulating layer, and the end of the connecting conductor is fitted to one side of the first insulating layer and one side of the conductor. A male side bushing in which a hole is formed, a convex portion is formed on the other side of the first insulating layer, and the other end of the conductor projects at the end, and a second bush provided on the outer wall of the container in which the electric device is stored A central conductor having one end protruding from one end of the first insulating layer is buried in one side of the axis of the insulating layer, and a convex portion of the first insulating layer is fitted in the other side of the second insulating layer to form a conductor. The other end is a conductor connecting portion of a switchgear including a female side bushing fitted to the other end of the center conductor.

According to a third aspect of the present invention, a conductor is embedded on one side of the axis of the first insulating layer, and a recess is formed on the other side of the axis of the first insulating layer. A female bushing in which a through hole into which an end of a connecting conductor is fitted is formed on one side of the shaft center of the insulating layer, and a shaft center of a second insulating layer penetrating the outer wall of a container accommodating electrical equipment. A conductor connecting portion of a switchgear including a male side bushing in which a central conductor is embedded in the second insulating layer, and a convex portion that fits into the concave portion of the first insulating layer is formed on one side of the second insulating layer.

Further, according to a fourth aspect of the invention, a conductor is embedded on one side of the axis of the first insulating layer, and a recess is formed on the other side of the axis of the first insulating layer. A female bushing in which a through hole into which an end portion of a connecting conductor is fitted is formed on one side of the axis of the insulating layer and one side of the conductor, and a second insulation provided through the outer wall of the container in which the electric device is housed. A central conductor is embedded in the axis of the layer, a convex portion that fits into the concave portion of the first insulating layer is formed on one side of the second insulating layer, and one end of the central conductor projects at the end of the convex portion. It is a conductor connecting portion of a switchgear including a side bushing.

[0021]

In the invention described in claims 1 and 2, the convex portion of the male bushing is the concave portion of the female bushing attached to the outer wall with the end of the connecting conductor fitted in the through hole. Is fitted to.

Further, in the inventions according to claims 3 and 4, the concave portion of the female side bushing is a male side bushing penetrating the outer wall in a state where the end portion of the connecting conductor is fitted in the through hole. It is fitted to the convex part of.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 show an embodiment of the conductor connecting portion of the invention described in claims 1 and 2, and boxes 1B and 1D.
The state just before connecting between is shown. Among these, FIG. 1 is a vertical cross-sectional view showing a state in which the male T-shaped bushings 3A and 3B are assembled in an assembly factory and the cable 2 is connected.

In FIG. 1, T-shaped bushings 3A and 3B are provided.
The insulating layer 4 made of epoxy resin is formed on the outer circumference of the substantially T-shaped central conductor 5 by cast molding, and a through hole penetrating left and right is formed in the head. A cylindrical head portion 5 a is formed on the upper portion of the central conductor 5, and a ground layer 4 b is formed on the outer periphery of the head portion 4. The central conductor 5 protruding from the lower end of the insulating layer 4
A contactor 9 having the same shape as the contactor 8 is inserted into the lower end of the contactor 8, and an annular contact plate made of a conductive spring material is attached to the outer periphery of the contactor 9.

The cables 2 are inserted into the T-shaped bushings 3A and 3B from both sides. Similar to the conventional cable connecting portion shown in FIG. 7, a contact 8 is attached to the end of the cable 2 at the end of the core wire 2a together with a wedge and a contact plate (not shown). Also, at both ends of the cable 2,
The stress cone 6, which is the same as the stress cone 6 shown in FIG. 7, is attached to the outside of the inner cover.

Of these, the contactor 8 is inserted into the head portion 5a of the central conductor 5, the stress cone 6 is inserted into the through hole formed in the head portion 4, and is attached to the end portion of the cable 2. It is pressed against the inner surface of the through hole via silicone grease by a fastener (not shown).

In FIG. 2, a bushing 7A having a substantially frustoconical female side and having a substantially V-shaped cross section is provided so as to penetrate from the upper portion to the ceiling portion of boxes 1B and 1D constituting a power receiving board (not shown). 11a formed on the outer periphery of the upper end of the
The lower surface of is in contact with the upper surfaces of the boxes 1B and 1D. The flange portion 11a is provided with an unillustrated burial, and the bushing 7A is airtightly fixed to the ceiling plates of the boxes 1B and 1D via the burial and an O-ring (not shown) inserted in the ceiling plate. There is.

The bushing 7A has an insulating layer cast on the outer periphery of the central conductor 10 embedded in the shaft center with an epoxy resin.
11 is formed, and a frustoconical recess 11 is formed from the middle portion to the upper end.
b is formed, and silicone grease is applied to the inner periphery of the recess 11b immediately before the lower portion of the male bushing 3A shown in FIG. 1 is inserted as described later.

The T-shaped bushing 3 thus configured
In the conductor connecting portion composed of A, 3B and the cable 2 and the bushings 7A, 7B, the male T-shaped bushings 3A, 3B to which the cable 2 is connected and assembled as shown in FIG. 1 in the assembly plant are shown in FIG. Female bushing 7
The boxes 1B and 1D are connected by inserting them into A and 7B and fastening the T-shaped bushings 3A and 3B to the boxes 1B and 1D with a fastener (not shown). In addition, the cable 2 shown in FIG.
The T-type bushings 3A and 3B are connected in the order described with reference to FIG. 6 in the related art. However, since they can be connected to the workbench of the assembly plant equipped with the dustproof equipment, they can be connected quickly and with high accuracy. be able to.

Further, at the installation site of the power receiving panel, the cable 2 and the T-shaped bushings 3A and 3B assembled to a transportable length (for example, about 4 m) or less are directly connected from above the power receiving panel as described above. Since it can be installed in a box that is mounted on the board, not only the work is easy, but also the connection work in a dusty environment accompanying the progress of other construction can be done in a short time, and the application of silicone grease Since it is possible to prevent dust from adhering to the surface, it is possible to improve the reliability of insulation of the connection portion.

Next, FIGS. 3 and 4 are views showing a conductor connecting portion of the invention described in claims 3 and 4, FIG. 3 corresponds to FIG. 1, and FIG. It is a figure corresponding to.

Of these, FIG. 3 shows the female bushing 13
FIG. 1 is a vertical sectional view showing a state in which A and 13B are connected by a cable 2, and an assembly plant is assembled in the same manner as in FIG. In FIG. 3, the central conductor 15 is formed with a through hole penetrating left and right in an upper portion thereof, and a cylindrical portion 15a having a substantially U-shaped cross section is formed in a lower end thereof. An insulating layer 14 made of epoxy resin is formed on the outer periphery of the central conductor 15, a through hole penetrating left and right is formed in the upper part of the insulating layer 14, and a truncated cone-shaped recess 13a is formed in the lower part of the insulating layer 14. Is formed, and the ground layer 14b is formed on the outer periphery of the insulating layer 14.
Are formed.

The stress cones 6 are inserted from both sides into the above-mentioned through holes of the bushings 13A and 13B, as in FIG. 1, and the through holes formed in the upper part of the center conductor 15 are shown at both ends of the cable 2. The contactor 8 inserted through a wedge is attached together with a contact ring (not shown).

On the other hand, male bushings 16A and 16B are provided so as to penetrate from the top to the ceiling portions of the boxes 1B and 1D. In the bushings 16A and 16B, an insulating layer 17 made of epoxy resin having a rhombic cross section is formed on the outer periphery of the central conductor 12, and a flange portion 17a is formed in the central portion. The lower surface of the flange portion 17a has a box body 1B. , 1D is in contact with the upper surface of the outer periphery of the through hole of 1D via an O-ring (not shown) and is fixed from above. On the outer periphery of the insulating layer 17, a ground layer 17b is formed on the flange 17a. On the upper end of the center conductor 12, a contact 9 having the same shape as the contact 8 and slightly smaller is press-fitted, and a contact plate (not shown) is attached to the outer periphery of the contact 9.

Even in the conductor connecting portion thus configured, the connection between the cable 2 and the bushings 13A and 13B is as shown in FIG.
It is done in the assembly factory as well as the conductor connection part shown in. Also, at the site of installation, the recess 13a formed in the lower portion of each bushing 13A, 13B is formed into a truncated cone-shaped convex portion formed on the upper portion of each bushing 16A, 16B shown in FIG. 4 and coated with silicone grease 17b. Mating. Next, each bushing 13A, 13
By attaching a not-shown tightening metal fitting made of mild steel plate formed in a substantially Ω shape from above B, and tightening it to the boxes 1B and 1D,
The recesses of the bushings 13A and 13B are pressed against the bushings 16A and 16B.

In this case as well, similar to the cable connection portion shown in FIGS. 1 and 2, the connection work at the installation site can be performed in a short time, and the reliability of the insulation of the connection portion can be improved.

[0037]

As described above, according to the invention of claim 1,
A conductor is embedded in the axis of the first insulating layer, a through hole into which an end of the connecting conductor fits is formed on one side of the first insulating layer, and a convex portion is formed on the other side of the first insulating layer. The male side bushing and the second one provided on the outer wall of the container accommodating the electric device.
By including a female side bushing in which a central conductor is embedded on one side of the axis of the insulating layer, and a concave portion to which the convex portion of the first insulating layer fits is formed on the other side of the second insulating layer, With the convex part of the male side bushing, the end part of the connecting conductor is fitted in the through hole,
Since it is fitted in the concave portion of the female bushing attached to the outer wall, it is possible to obtain a connection portion that can easily connect the boxes.

According to the second aspect of the invention, the conductor is embedded in the axis of the first insulating layer, and the end portions of the connecting conductor are fitted to one side of the first insulating layer and one side of the conductor. And a male bushing in which a protruding portion is formed on the other side of the first insulating layer and the other end of the conductor projects at the end, and a through hole formed on the outer wall of the container in which the electric device is housed. A central conductor having one end protruding from one end of the first insulating layer is embedded in one side of the axis of the second insulating layer, and the convex portion of the first insulating layer is fitted in the other side of the second insulating layer. By providing the female side bushing in which the other end of the conductor fits into the other end of the center conductor, the convex portion of the male side bushing is
Since the end portion of the connecting conductor is fitted in the through hole and fitted in the concave portion of the female bushing attached to the outer wall, it is possible to obtain a connecting portion which can easily connect the boxes. .

According to the third aspect of the invention, the conductor is embedded on one side of the axis of the first insulating layer, and the recess is formed on the other side of the axis of the first insulating layer. The female bushing in which a through hole into which the end of the connecting conductor is fitted is formed on one side of the shaft center of the first insulating layer, and the second insulating layer formed through the outer wall of the container accommodating the electric device. The center conductor is embedded in the shaft center,
By providing the male side bushing in which the convex portion that fits into the concave portion of the first insulating layer is formed on one side of the second insulating layer, the concave portion of the female side bushing can be formed so that the end portion of the connecting conductor is formed in the through hole. In the fitted state, it is fitted into the convex portion of the male side bushing penetratingly provided on the outer wall, so that it is possible to obtain the connecting portion which can easily connect the boxes.

Further, according to the invention of claim 4,
A conductor is embedded on one side of the axis of the first insulating layer, a recess is formed on the other side of the axis of the first insulating layer, and a connecting conductor is provided on one side of the axis of the first insulating layer and on one side of the conductor. The central conductor is embedded in the female bushing having a through hole into which the end portion of the second insulating layer is formed, and the axial center of the second insulating layer penetrating the outer wall of the container accommodating the electric device. A convex portion is formed on one side of the insulating layer so as to be fitted in the concave portion of the first insulating layer, and a male side bushing having one end of the center conductor protruding is provided at the end of this convex portion to form the concave portion of the female side bushing. Since the end portion of the connecting conductor is fitted in the through hole, it is fitted in the convex portion of the male bushing penetrating the outer wall, so that a connecting portion that can easily connect the boxes is obtained. You can

[Brief description of drawings]

FIG. 1 is a partial vertical cross-sectional view showing an embodiment of a conductor connecting portion of a switchgear according to the first and second aspects of the invention.

FIG. 2 is a partial vertical cross-sectional view different from FIG. 1 showing an embodiment of a conductor connecting portion of the switchgear according to the first and second aspects of the invention.

FIG. 3 is a partial vertical cross-sectional view showing an embodiment of a conductor connecting portion of the switchgear according to the invention described in claims 2 and 3.

FIG. 4 is a partial vertical cross-sectional view different from FIG. 3 showing an embodiment of the conductor connecting portion of the switchgear according to the second and third aspects of the invention.

FIG. 5 is a perspective view showing a power receiving board in which a conductor connecting portion of a conventional switch gear is incorporated.

FIG. 6 is a vertical cross-sectional view showing an assembling process of a conductor connecting portion of a conventional switchgear.

7 is a partially enlarged view of FIG.

[Explanation of symbols]

1A, 1B, 1C, 1D ... Box body, 2 ... Cable, 3A,
3B ... T type bushing, 4,11,14,17 ... insulating layer, 5,
10, 12, 15 ... Central conductor, 6 ... Stress cone, 7A, 7
B, 13A, 13B, 16A, 16B ... Bushing, 8, 9 ... Contactor.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadashi Kase 2-1-1, Oda Sakae, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Showa Electric Wire & Cable Co., Ltd. (72) Naoya Hasegawa 2 Sakae, Oda, Kawasaki-ku, Kawasaki-shi, Kanagawa No. 1-1 No. 1 Showa Electric Cable Denki Co., Ltd. (72) Masaru Miyagawa 1st Toshiba Town, Fuchu City, Tokyo Fuchu Factory Ltd. (72) Inventor Nobuo Masaki 1st Toshiba Town, Fuchu City, Tokyo Toshiba Corporation Fuchu Factory (72) Inventor Tetsuo Yoshida No. 1 in Toshiba Town, Fuchu City, Tokyo Inside Toshiba Fuchu Co., Ltd. (72) Inventor Akira Sato No. 1 in Toshiba Town, Fuchu City, Tokyo Within Fuchu Factory, Ltd. (72) Inventor Kenichi Sato 1 Toshiba Town, Fuchu City, Tokyo Inside the Fuchu Factory, Toshiba Corp. (72) Inventor Shin Kinoshita 1 Toshiba Town, Fuchu City, Tokyo Company Toshiba Fuchu Factory (72) Inventor Kyofumi Nagata 1-1-1, Shibaura, Minato-ku, Tokyo Inside Toshiba Headquarters Office (72) Inventor Hiroshi Sonobe 2121 Asahi-cho, Mie-gun, Mie Prefecture Toshiba Corporation Toshiba Mie factory

Claims (4)

[Claims] 1. A conductor is embedded in the axis of the first insulating layer,
A male bushing having a through hole into which an end of a connection conductor fits is formed on one side of the first insulating layer, and a convex portion is formed on the other side of the first insulating layer, and an electrical device is housed. A central conductor is embedded on one side of the axis of the second insulating layer provided on the outer wall of the container, and a concave portion into which the convex portion of the first insulating layer fits is formed on the other side of the second insulating layer. A conductor connecting portion of a switchgear including a formed female bushing. 2. A conductor is embedded in the shaft center of the first insulating layer,
A through hole into which an end of the connecting conductor is fitted is formed on one side of the first insulating layer and one side of the conductor, a convex portion is formed on the other side of the first insulating layer, and the end of the conductor is formed. A male bushing having the other end protruding, and a central conductor having one end protruding from one end of the first insulating layer on one side of the axis of the second insulating layer provided on the outer wall of the container accommodating the electric device are provided. And a female bushing that is embedded and in which the convex portion of the first insulating layer is fitted to the other side of the second insulating layer and the other end of the conductor is fitted to the other end of the central conductor. Switchgear conductor connection. 3. A conductor is embedded on one side of the axis of the first insulating layer, and a recess is formed on the other side of the axis of the first insulating layer. One side of the axis of the first insulating layer. A female bushing having a through hole into which the end of the connecting conductor is fitted is formed, and a central conductor is embedded in the axis of a second insulating layer penetrating the outer wall of the container accommodating the electric device. A conductor connecting portion of a switchgear, comprising a male side bushing having a convex portion formed on one side of the second insulating layer to fit into the concave portion of the first insulating layer. 4. A conductor is embedded on one side of the axis of the first insulating layer, and a recess is formed on the other side of the axis of the first insulating layer, and one side of the axis of the first insulating layer is formed. And a female bushing in which a through hole into which the end of the connecting conductor is fitted is formed on one side of the conductor, and the center of the second insulating layer that is provided through the outer wall of the container in which the electric device is housed. The conductor is buried, and the second
A conductor of a switchgear including a convex portion formed on one side of the insulating layer of the first insulating layer and fitted with a concave portion of the first insulating layer, and a male bushing having one end of the central conductor protruding at an end of the convex portion. Connection.