JPH06269115A - Bus connection part - Google Patents

Abstract

PURPOSE:To simplify the assembly operation of a connection part by a method wherein an internal electrode which connects buses electrically to each other, a half sleeve which couples the buses so as td sandwich the buses together with the internal electrode and a bushing are provided. CONSTITUTION:When buses 3 are connected electrically to each other via an internal electrode 12, the upper part of a bushing 11 and a half sleeve 11 are removed in advance. Thereby, the buses 3 are not moved to the lengthwise direction, and they can be set immediately to a prescribed position at the internal electrode 12 when they are moved in parallel from the upper part. After that, the sleeve 13 is fixed by using a bolt 14, the bushing 11 is integrated and a connecting operation is completed. Thereby, the assembly operation of a connection part can be simplified, and its operating time can be shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a busbar connecting portion suitable for a T-branch connecting portion of an inter-board busbar.

[0002]

2. Description of the Related Art For example, a T-type connecting portion for connecting a cable to a device such as GIS, a busbar connecting portion of a row board cubicle, a pull-in / pull-out cable connecting portion, etc. are economical, compact, or easy to handle. For convenience, a combination of a T-shaped bushing and a cable-shaped bus bar is widely adopted.
FIG. 2 shows a perspective view of a conventional busbar connecting portion of this type. In the figure, this busbar connecting portion 1 has a structure in which a conductor 4 of a cable-shaped busbar 3 is electrically connected using an internal electrode 5 inside a bushing 2 made of epoxy resin or the like. A conductor lead-out rod 6 is connected to the internal electrode 5 to be electrically connected to an internal circuit of the device or the like.

[0003]

By the way, in the case where a plurality of busbar connecting portions having the above-mentioned structure are arranged side by side and the busbars are connected to each other, the following method has been conventionally adopted. FIG. 3 shows an explanatory view of a conventional busbar connecting method. In the figure, when two busbar connecting portions 2-1 and 2-2 arranged at a certain distance on the left and right sides are electrically connected using a busbar 3, the busbar 3 is preliminarily provided with conductors 4 at both ends thereof. After performing the terminal treatment for exposing, for example, linearly insert from the left side of the busbar connecting portion 2-1 as shown by the arrow 8, and insert one end of this busbar 3 into the other busbar connecting portion 2-2. Was there.

As another method, for example, after inserting one end of the busbar 3 from the right side of the busbar connecting portion 2-1 as shown by an arrow 9, the other end of the busbar 3 is connected to the other busbar connecting portion 2-.
This time, a method of inserting the bus bar 3 by shifting the bus bar 3 in the opposite direction was adopted. All of these are construction methods adopted because they cannot be bent easily because the busbar 3 has high rigidity.

However, in the conventional method as described above, it is necessary to assemble the busbar connecting portion in a predetermined procedure. For example, the busbar connecting portion as described above is formed in the longitudinal direction by three lines.
In the case where more than one is arranged and these are connected one after another by using the bus bar 3, there is a problem that it is difficult to start the bus bar insertion work from an arbitrary place. In particular, in such a case, if an arbitrary busbar connecting portion is to be disassembled even after completion, there is a problem that the busbar connecting portions before and after the disassembled busbar connecting portion must be dismantled at the same time.

The present invention has been made in view of the above points, and facilitates the assembly and connection work of this type of bus bar connecting portion, and allows the arbitrary bus bar connecting portion to be freely disassembled. It is intended to provide.

[0007]

According to a first aspect of the present invention, an internal electrode for electrically connecting busbars to each other and a half sleeve for connecting the busbars with the internal electrode sandwiching the busbar. And a bushing that surrounds the entire branch connecting portion including the connecting portion of the bus bar and that is divided by a surface including the bus bar. or,
According to a second aspect of the present invention, the busbar connecting portion includes a positioning ring that receives and fits a conical portion formed at a joint portion of the divided bushing piece to position the divided bushing piece. And The third invention is
A bushing that surrounds the entire connecting portion including the connecting portion of the busbar and is divided by a surface that includes the busbar, an elastic insulator that is sandwiched between the bushing dividing surfaces, and the divided bushing is pressed against the dividing surface. The present invention also relates to a busbar connecting portion, which is provided with a fixing member that is integrated with the busbar connecting portion.

[0008]

The bushing forming the busbar connecting portion and the portion for connecting the busbars have a dividable structure as a whole. Therefore, the busbars can be connected to each other and the bushing can be assembled without moving the busbars in the longitudinal direction. The divided bushing pieces are accurately positioned by the positioning ring and integrated by the fixing member.

[0009]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. 1A and 1B show an embodiment of a busbar connecting portion of the present invention. FIG. 1A is a vertical sectional view thereof, and FIG. 1B is a sectional view of a main portion taken along the line AA. The busbar connecting portion in the figure is for electrically connecting the pair of left and right busbars 3 to each other. The entire branch connecting portion is surrounded by the bushing 11,
The bushing 11 is vertically divided into two parts with the dividing surface 10 shown in FIG.

The conductor 4 exposed from the end of the cable-shaped bus bar 3 is inside the bushing 11 and the internal electrode 1.
Electrically connected to 2. In this embodiment, the internal electrode 12 electrically contacts the lower half of the conductor 4, and the upper half of the conductor 4 contacts the half sleeve 13.
A bolt hole 13-1 is provided in the half sleeve 13, and the bolt 14 inserted therein is used for the internal electrode 12.
The half sleeve 13 and the internal electrode 12 are integrated by being screwed into the bolt hole 12-1. A guard electrode 15 is provided inside the divided upper half of the bushing 11 for electrical protection.

A bushing 11 is provided at the end of the bus bar 3.
An insulating spacer 17 is fitted in to fill the gap created between the insulating spacer 17 and the insulating spacer 17. The insulating spacer 17 is made of insulating rubber or the like. Further, in order to maintain the airtightness of the end portion of the insulating spacer 17, a seal portion 18 is provided, which is arranged so as to strongly grip the outer skin of the bus bar 3. Further, a conical portion 11-1 is formed at both ends of the bushing 11 so as to sandwich the dividing surface 10, and a positioning ring 20 that fits with the conical portion 11-1 is fitted therein. .

Further, an elastic insulator such as an insulating rubber 21 is sandwiched between the divided surfaces 10 of the bushing 11 divided into two, as shown in FIG. This insulating rubber 21
As shown in FIG. 1B, when the bushing 11 is assembled, a pressure of a certain level or more is exerted on each other on the dividing surface 10 to enhance the adhesion and ensure electrical insulation. With such a configuration, the bushing 11 can be divided.

In the busbar connecting portion of the present invention having the above structure, when the busbars 3 are electrically connected to each other, the upper half of the bushing 11 and the half sleeve 13 are removed in advance. As a result, the bus bar 3 can be immediately set at a predetermined position of the internal electrode 12 by moving in parallel from above without moving in the longitudinal direction. After that, half sleeve 1
The connection work is completed by fixing 3 with the bolt 14 and integrating the bushing 11. Therefore, such connection work is sufficiently simplified as compared with the conventional art.

For such a purpose, the bushing 1
In addition to this, various configurations can be considered for the configuration of the one division surface 10. FIG. 4 is an explanatory view of a bushing dividing method of the busbar connecting portion of the present invention. For example, as shown in FIG. 4A, the bushing 11-5 is simply divided into two parts up and down, and the boundary surface 1
A plate-shaped insulating rubber is sandwiched between 0-1. Further, as shown in (b), the bushing 11-6 is vertically divided into two parts, and the divided surface is corrugated, and a similar insulating rubber is sandwiched therein.
In the example of (c), the dividing surface 10-4 is formed on a surface that does not pass through the axis of the generatrix. In this case also, the insulating rubber is sandwiched between the divided surfaces. Further, in the example of (d), the bushing 11-8 is divided into three by the three dividing surfaces 10-5. Thus, the bushing can be divided by two or more free surfaces, and in particular, in the case of a large bushing, it is preferable to have such a multi-divided structure.

Next, in the embodiment (e), the upper half of the bushing 11-9 divided into two has a substantially mountain-shaped cross section, and the dividing surface 10-6 is formed in a slightly parabolic shape. Even with such a shape, the upper portion of the bushing 11-9 is opened and the connecting portion of the busbar can be accommodated in the bushing while moving in parallel from above. The same applies to the case of FIG. 6 (f), which has a cross-sectional structure in which the top and bottom are exactly reversed from the embodiment shown in (e). In the case of this bushing 11-10, when the upper half is removed, the connecting portion of the busbar is widely opened. Therefore, with such a configuration, it is possible to employ a method such as compression connection without using the half sleeve as shown in FIG. 1 for the connecting portion of the busbar itself.

In the embodiment (g), the bushing 11 is provided with the dividing surface 10-8 so that the cross section is just fan-shaped.
-11 is shown. Its action is similar to that of (e) and (f). Further, in the above examples, the bushing has a circular cross section, but the bushing may have a rectangular cross section as shown in FIG. The dividing surface 10-9 of the bushing 11-12 of this embodiment is linear, but the dividing surface may be a curved surface as shown in (a) to (g) or may be inclined appropriately. Absent.

FIG. 5 is a side view of the bushing showing the effect of the positioning ring 20 shown in FIG. The bushing 11 shown in FIG. 5 is vertically divided into two parts, and is simply integrated by using the band 23. However, when such a band 23 is used, the divided surfaces of the bushing 11 cannot always be accurately aligned. Therefore, in the embodiment shown in FIG. 1 of the present invention, conical portions 11-1 are provided at both ends of the bushing 11 and the positioning ring 2 fitted therein is provided.
0 is set. As a result, the divided upper and lower parts of the bushing 11 are accurately positioned and integrated. Therefore, in this case, for example, bolts and other parts for integrating the bushing 11 can be omitted.

FIG. 6 shows an embodiment of a fixing member for fixing and integrating the divided bushings. (A) ~
Each of (f) shows the fixing member viewed from the end face side of the bushing. In the embodiment of FIG.
1-5 is the one of the embodiment shown in FIG.
In this case, band-shaped saddles 25-1 are used to integrally fix the bushings 11-5, which are divided into upper and lower parts, and both ends thereof are fixed to a base or the like not shown by bolts 26-1. By tightening the bolt 26-1, pressure is applied to the divided surface of the bushing 11-5, and the elastic insulator described above is sandwiched. In the figure (b), ribs 27 are provided on the side surfaces of the upper half of the bushings 11-13. The rib 27 is pressed by a key-shaped fixing member 25-2 and tightened by a bolt 26-1.

Further, in the embodiment shown in FIG. 6C, ribs 27 are provided on the side surfaces near the upper and lower split surfaces of the bushing 11-14, respectively. Then, a bolt 25-3 is provided so as to penetrate the rib 27, and both are fastened and integrated. In the embodiment shown in FIG.
Ribs 27 are provided on the side surfaces of the upper half of the bushings 11-15, and the lower half is formed to have a larger radius than the upper half. A bolt 25-4 is provided so as to penetrate the rib 27 of the upper half and be screwed into the upper side surface of the lower half. The bushings 11-15 are integrated by these.

The embodiment (e) is provided with a saddle 25-5 which is obtained by dividing the saddle 25-1 of the embodiment (a) into two. Tighten both with bolts 26-2,
The tightening force of the bushings 11-16 is increased.
Therefore, it is not necessary to adjust the tightening force of the bolt 26-1. In (f), the lower half of the bushing 11-17 has a trapezoidal shape, and the rib 28 is provided on the upper portion thereof. And
The saddle 25-6 is C-shaped, and its center is divided into two. Bolt 26-2 tightens this saddle 25-6,
Sufficient pressure is applied to the dividing surface of the bushing 11-17. With the above-described configuration, it is possible to integrate the bushing while applying an appropriate pressure to the elastic insulator sandwiched between the divided surfaces of the divided bushing.

The present invention is not limited to the above embodiments. In the above embodiment, the busbar connecting portion is described as a T-branch type, but a similar configuration can be adopted for, for example, a Y-branching, an L-shaped branching, or a linear connecting portion. Further, the bus bar may have a structure similar to that of a conventional power cable in the related art, or may have a flat cross section instead of a round cross section. Further, the shapes and lengths of the internal electrodes and the half sleeves, and the configuration for connecting the two may be freely changed within a range having the same function. Further, the elastic insulator sandwiching the bushing between the divided surfaces is not limited to insulating rubber, and may be, for example, insulating plastic.

[0022]

The busbar connecting portion of the present invention described above has a structure in which the electrodes and bushings for electrically connecting the busbars to each other can be divided as a whole, so that the busbars can be easily moved without moving in the longitudinal direction. The connection part can be completed. Therefore, the connecting portion assembling work is simplified and the working time can be shortened. Even when three or more busbar connecting portions are arranged side by side, only arbitrary busbar connecting portions can be individually disassembled, and maintenance management and accident recovery can be achieved. This kind of work becomes easier. Further, if the bushings divided by the positioning ring are integrated, the positioning of each divided piece of the divided bushing becomes easy and accurate. In addition, the fixing member can press the bushing dividing surface to integrate the bushing and maintain its electrical characteristics. Furthermore,
There is also an effect that various connecting works can be performed within the range of the length of the busbar.

[Brief description of drawings]

FIG. 1 shows an embodiment of a busbar connecting portion of the present invention,
(A) is the longitudinal cross-sectional view, (b) is the principal part sectional view which follows the AA line.

FIG. 2 is a perspective view of a conventional general busbar connecting portion.

FIG. 3 is an explanatory view of a conventional busbar connecting portion assembling method.

FIG. 4 is an explanatory view of a bushing dividing method of the busbar connecting portion of the present invention.

FIG. 5 is an effect explanatory view of a positioning ring that integrates a bushing.

FIG. 6 is an end view of a fixing member embodiment in which the bushing of the present invention is integrated.

[Explanation of symbols]

 3 Bus bar 4 Conductor 11 Bushing 11-1 Conical part 12 Internal electrode 13 Half sleeve 14 Bolt 20 Positioning ring 25-1 Fixing member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shin Kinoshita 1 in Toshiba Fuchu factory, Fuchu-shi, Tokyo (72) Inventor Tetsuo Yoshida 1 in Toshiba Town, Fuchu, Tokyo Toshiba Fuchu factory ( 72) Inventor Tadashi Nonoshita No. 1 in Toshiba Fuchu factory, Fuchu-shi, Tokyo (72) Inventor Nobuo Masaki No. 1 in Toshiba Fuchu factory, Fuchu-shi, Tokyo Tokyo (72) Inventor, Masaru Miyagawa Tokyo 1st floor, Toshiba Town, Fuchu-shi Toshiba Corporation (72) Inventor Hiroshi Sonobe 2121 Nawao, Asahi-machi, Mie-gun, Mie Pref., Mie Factory, Toshiba Corporation (72) Ryoichi Kojima Oda Kawasaki-shi, Kawasaki-shi, Kanagawa Sakae 2-1-1, Showa Electric Wire & Cable Co., Ltd. (72) Inventor Masa Kase 2-1-1, Oda Sakae, Kawasaki-ku, Kawasaki-shi, Kanagawa (72) Inventor Naoya Hasegawa 2-1-1 1-1 Oda Sakae, Kawasaki-ku, Kawasaki-shi, Kanagawa

Claims (3)

[Claims] 1. An internal electrode for electrically connecting busbars to each other, a half sleeve for connecting the busbars with the internal electrode sandwiching the busbars, and an entire branch connecting portion including a connecting portion of the busbars. And a bushing divided by a surface including the busbar. 2. The positioning ring according to claim 1, further comprising a positioning ring for receiving and fitting a conical portion formed at an end portion sandwiching the split surface of the bushing, and positioning the split bushing. Busbar connection. 3. A bushing which surrounds the entire connecting portion including a connecting portion of the busbar and is divided by a surface including the busbar, an elastic insulator sandwiched between the bushing dividing surfaces, and the divided bushing. A busbar connecting portion comprising a fixing member that pressurizes and divides the divided surfaces to integrate them.