JP2980408B2 - Conductor connection - Google Patents

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 used for a gas insulated switchgear or the like.

[0002]

2. Description of the Related Art FIG. 7 shows a T-shaped bushing attached to a conventional gas-insulated closed switchboard and disclosed in Japanese Patent Application Laid-Open No. 60-160309. At the center of 32 is a T-shaped central conductor 34
Is embedded in advance, and the lower end of the branch conductor 34a vertically extending from the center of the center conductor 34 projects from the lower end of the insulating layer 32 and is connected to a conductor (not shown) provided on the gas insulated closed switchboard 7. ing. The central portion of the center conductor 34 is formed in a tubular shape whose inside penetrates left and right, and a contact portion 5 fitted to the distal end of the core wire of the cable 3 inserted from the right side is formed inside the tubular portion. Has been inserted.

[0003] At the end of the cable 3 , a cylindrical stress cone 12 having a substantially truncated cone shape is inserted.
The outer, conical cylindrical mold stress cone 15 is further
The protective tube 10 is inserted outside the mold stress cone 15 and is hermetically fixed to the right side of the insulating layer 32 in FIG. Inside the protective tube 10, a pressing member 11 made of a stud, a coil spring, or the like, which is omitted in detail, is attached in advance,
The right middle part of the mold stress cone 15 is the pressing member 11
Is pressed by the left end of the stud. Therefore, the outer periphery of the stress cone 12 pressed by the mold stress cone 15 is pressed against the inner surface of the insulating layer 32, and the cable 3 is moved in the center Is pressed. Also,
An insulating tape 14 is wound between the outer circumference of the right end of the protection tube 10 and the jacket of the cable 3.

On the other hand, on the left side of the center conductor 34, is fitted Yu right end of Mekurabo 31, this Mekurabo 31 is inserted from the left side in advance stress cone 12 and the molded stress cone 15 in turn, insulated with bolts layer 32 is pressed from the left side by a substantially convex blind tube 33 fixed to the left side surface. Protection tube 10 and blind tube 33
An O-ring groove is formed in the flange portion of
Are inserted, and an O-ring 16 is inserted into an O-ring groove provided on the upper surface of the mounting plate 8 mounted on the upper surface of the gas-insulated closed switchboard 7.

In the T-shaped bushing constructed as described above, the main circuit equipment of the gas-insulated closed switchboard 7 is connected to the lower end of the branch conductor 34a. In FIG. 7, if a box is added on the left side, Remove the cul 33, insert the cable 3 that facilities similar end processing and the right, also protective tube
By attaching 10 or the like, it is possible to connect to a T-shaped bushing (not shown) on the upper surface of the additional box body.

FIG. 8 is a sectional view showing a conventional L-shaped bushing. The L-shaped bushing shown in FIG. 8 is used for a box at the end of a row board in which the cables 3 on both sides are insulated from the air and the above-mentioned additional board need not be taken into account. Both are L-shaped. In FIG. 8,
The right and lower sides are the bisector A of the cable 3 crossing at right angles
In exactly symmetric with respect to the protective tube 10, the pressing member 11 in FIG. 7, the stress cone 12, and a mold stress cone 15, winding of insulating tape 14 is also mounted on both sides, are subjected.

[0007]

[Problems to be solved by the invention]
The T-shaped bushing shown in Fig. 7 considers an extension board as described above.
For your convenience, in FIG.
With the cold stress cone 15 and the pressing member 11,Further
In addition, since the blind tube 33 and the blind rod 31 are incorporated,
Is a T-shaped connectionFormThe same parts are required.

On the other hand, the L-shaped bushing shown in FIG.
Since the branch conductive 34a and is not circular frustum-shaped epoxy resin molding portion of its periphery indicated by, although it is possible to reduce some number of parts, since limited for aerial both ends insulated as described above, further, configured It is desired that the number of parts is small and can be applied to a box in which insulating gas is sealed. Therefore, an object of the present invention can be applied to various uses with a simple configuration.
The goal is to obtain a conductor connection .

[0009]

According to the present invention, there is provided an insulating cover provided on an outer surface of a mounting hole in an outer wall of a box in which an insulating gas is sealed.
The end surface of one side of the single is fixed hermetically end of the conductor which is arranged on the outside of the box body is inserted from the opening of <br/> other side orthogonal to the one side of the insulating bushing inside the center of the insulating bushing At the conductor connection part connected to the other side of the conductor ,
The inner circumference to form an electric field relaxation portion to form a spot facing the front end of the connecting rod projecting <br/> the box body on the outside of the mounting hole is fitting engagement through the contact pieces on one side of the center conductor, the box absolute connection tube that covers the conductor connected to the other side of the center conductor is disposed outside of the body in an airtight
Airtightly fixed to the outer peripheral end face of the opening on the other side of the edge bushing
In to Rukoto, it was applicable to a variety of applications with a simple structure
It is a conductor connection part .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the conductor connecting portion of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing a conductor connecting portion of the present invention, and FIG. 2 is a right side view of FIG. 1 and 2, although the upper part of the right which is the same configuration as L-shaped bushing of Fig. 8, lower part is not protective tube 10 and the internal components thereof shown in Figure 8, the insulating layer 2 in the interior An O-ring 16 and a substantially convex fixing band 19 are attached to the upper surface of a mounting plate 8 welded to the upper part of the ceiling surface of the gas-insulated closed switchboard 7 in which insulating gas is sealed.

The lower part of the inner periphery of the through hole of the mounting plate 8 has a cross section.
Is formed in the shape of an electric field, and a round bar-shaped conductor 4 whose lower end is connected to the main circuit device of the gas insulated closed switchboard 7 penetrates vertically through the through hole. A contact portion 5 having a contact plate 5a wound around the outer periphery thereof is attached to the contact portion 5. The contact portion 5 is fitted to the counterbore portion 6 from below the center conductor 1 via the contact plate 5a .

In the conductor connecting portion thus constructed, the conductor 4 and the ground potential mounting plate 8 through which the conductor 4 penetrates.
The electric field between the inner circumferences of the through-holes is reduced by the electric field relaxation unit 9,
The electric field between the central conductor 1 and the mounting plate 8 is reduced by the annular shield portion 1a formed at the lower end of the central conductor 1.

In the conductor connecting portion constructed as described above, since there is no branch conductor 34a at the lower part of the T-shaped bushing shown in FIG. In addition to being small in size and easy to manufacture, since there is no protruding portion into the inside of the gas insulated closed switchboard 7, restrictions on the arrangement of devices inside the closed switchboard 7 are reduced, and design is facilitated. In addition,
Since the number of parts can be reduced as compared with the L-shaped bushing of FIG. 8, the manufacture becomes easy.

FIG. 3 shows another embodiment of the conductor connecting portion of the present invention, and shows a corresponding example when a gas-insulated bus is used for connection between boxes of a closed switchboard. That is, a bus connecting tube 18 of a gas-insulated bus is air-tightly connected to the right side surface of the insulating layer 2 via the O-ring 13, and a contact of a distal end of a bus conductor 17 disposed inside the bus connecting tube 18 is provided. The part 5 is fitted to the center conductor 1.

FIG. 4 shows another embodiment of the conductor connecting portion according to the present invention, which is different from that of the first embodiment, which is attached to the middle portion of the row board and is connected to the left and right boxes and the bus connecting pipe 18 of the gas insulated bus. in the example, the central conductor 21 and the insulating layer 22 is formed in a T shape, medium
Counterbore portions 6 are provided on the left and right and at the bottom of the core conductor 21, and an insulating layer
Shows a case where busbar connection pipe 18 is Ru are symmetrically connected to the left and right 22.

FIG. 5 shows another embodiment of the conductor connecting portion of the present invention, which is similar to FIG. 4, and shows an example corresponding to an application which can be connected to adjacent boxes on both sides by cables. When the cables 3 disposed in the air on both sides of the insulating layer 22 are connected. At this time, the core wires of the cable 3 are fitted on both sides of the T-shaped center conductor 21 via the contact portions 5, and the protection tube 10 and the like are attached to the outer periphery and are insulated by taping 14.

FIG. 6 shows still another embodiment of the conductor connecting portion according to the present invention, which is a corresponding example when the conductor 4 at the center of the conductor connecting portion in FIG.

[0018] In the above embodiments, any of the conductive
Although the description has been given of the example in which the body connection portion is also provided on the ceiling portion of the gas insulated closed switchboard, the mounting box body may be a gas insulated electric device, and the mounting surface may be another portion.

[0019]

As described above, according to the present invention, one end face of the insulating bushing is airtightly fixed to the outer surface of the mounting hole of the outer wall of the box in which the insulating gas is sealed, and is disposed outside the box. in the conductor connecting portion which the end of the conductor is connected to the other side of the interior of the center conductor of the inserted insulation bushing from the opening of the other side orthogonal to the one side of the insulating bushing, the electric field on the inner periphery of the attachment hole
Forming a relief part, a contact that protrudes from the inside of the box to the outside of the mounting hole
Central guiding a spot facing the front end of the connection rod is fitting engagement through the contact piece
Formed on one side of the body, the other of the center conductor is disposed outside of the box
Insulating bushing for the connection pipe that covers the conductor connected to the side airtightly
In will lock airtightly to the opening of the other side outer peripheral end face of the grayed, reducing the parts of the box side connecting portion, the connection of the outer box body cable, since both insulated bus was available, a simple A conductor connection portion that can be applied to various uses with a structure can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a conductor connecting portion of the present invention.

FIG. 2 is a right side view of FIG.

FIG. 3 is a longitudinal sectional view showing another embodiment of the conductor connection portion of the present invention.

Longitudinal sectional view showing another different embodiment of the conductor connection portions of the present invention; FIG.

Figure 5 is a longitudinal sectional view showing still other different embodiment of the conductor connecting portion of the present invention.

FIG. 6 is a longitudinal sectional view showing still another embodiment of the conductor connecting portion according to the present invention.

FIG. 7 is a partial cross-sectional view showing an example of a conventional conductor connection portion .

FIG. 8 is a longitudinal sectional view showing an example of a conventional conductor connecting portion different from FIG. 7 ;

[Explanation of symbols]

1, 21: center conductor, 2, 22, 42: insulating layer, 3: cable, 4: conductor, 5: contact portion, 5a: contact plate, 6: counterbore portion, 7: gas- insulated closed switchboard, 8: mounting Plate, 9 ... electric field relaxation part, 10 ... protective tube, 11 ... pressing member, 17 ... bus conductor, 18 ...
Busbar connection pipe .

──────────────────────────────────────────────────続 き Continuing the front page (72) Katsumi Goto, Inventor 1-1-1, Shibaura, Minato-ku, Tokyo Inside the head office of Toshiba Corporation (56) References JP-A-60-160309 (JP, A) (58) ) Field surveyed (Int.Cl. ⁶ , DB name) H01B 17/00-17/54 H02B 13/02-13/04

Claims (1)

(57) [Claims] Attachment of an outer wall of a box body filled with an insulating gas.
One end face of the insulating bushing is air-tightly fixed to the outer surface of the hole, and the end of the conductor disposed outside the box body is insulated.
In a conductor connection portion inserted through an opening on the other side orthogonal to one side of the bushing and connected to the other side of the center conductor inside the insulating bushing , an electric field relaxation portion is provided on the inner periphery of the mounting hole.
And protruded from the box body to the outside of the mounting hole .
It said counter bore the tip of the connecting rod is fitting engagement through the contact piece
Formed on one side of the center conductor, the gas to the end face of the other side of the outer periphery of the opening portion of the insulating bushing connection pipe disposed outside the box body covering hermetically the conductor connected to the other side of the center conductor
A conductor connection portion which is fixed tightly .