JP3550569B2 - Busbar connection - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a bus connecting portion suitable for a T-branch connecting portion of an inter-panel bus.
[0002]
[Prior art]
For example, a T-shaped connection for connecting a cable to a device such as a GIS, a busbar connection for a train cubicle, a cable connection for a lead-in / draw-out, and the like, have a T-shaped connection because of economy, compactness, or convenience in handling. A combination of a mold structure bushing and a cable-like bus is widely used.
FIG. 2 is a perspective view of a conventional bus connecting portion of this type.
In the figure, a bus connecting portion 1 has a structure in which a conductor 4 of a cable-shaped bus 3 is electrically connected using an internal electrode 5 inside a bushing 2 made of epoxy resin or the like. A conductor lead bar 6 is connected to the internal electrode 5 to be electrically connected to an internal circuit of the device.
[0003]
[Problems to be solved by the invention]
By the way, when a plurality of bus connecting portions having the above-described configuration are arranged side by side and connected to each other by a bus, the following method has conventionally been adopted.
FIG. 3 is an explanatory view of a conventional bus connection method.
In the figure, when two bus connecting parts 2-1 and 2-2 arranged at a fixed distance to the left and right are electrically connected using a bus 3, the bus 3 is connected to a conductor 4 at both ends in advance. After performing the terminal processing for exposing, for example, a straight line is inserted from the left side of the bus connecting portion 2-1 as shown by an arrow 8, and one end of the bus 3 is inserted into the other bus connecting portion 2-2. I was
[0004]
As another method, for example, after inserting one end of the bus 3 from the right side of the bus connecting portion 2-1 as shown by an arrow 9, the other end of the bus 3 is directed toward the other bus connecting portion 2-2. This time, a method has been adopted in which the bus 3 is shifted and inserted in the opposite direction.
Each of these methods is adopted because the rigidity of the bus bar 3 is so high that it cannot be easily bent.
[0005]
However, in the conventional method as described above, it is necessary to assemble the bus connecting portions in a predetermined procedure. For example, three or more bus connecting portions as described above are arranged in the longitudinal direction, and the bus connecting portions are successively arranged. In the case of connecting using the bus 3, there is a problem that it is difficult to start the bus insertion work from an arbitrary place. In particular, in such a case, there is a problem that if an arbitrary bus connecting portion is to be disassembled even after completion, the bus connecting portions before and after the bus connecting portion must be disassembled at the same time.
[0006]
The present invention has been made by paying attention to the above points, and provides a bus connecting portion having such a configuration that this type of bus connecting portion can be easily assembled and connected and an arbitrary bus connecting portion can be freely disassembled. It is intended for that purpose.
[0007]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided an internal electrode for electrically connecting a bus bar to each other, a half sleeve detachably attached to the internal electrode and holding the bus bar conductor together with the internal electrode, And a bushing that surrounds the entire branch connection portion including the connection portion and is divided by a plane including the bus bar.
In the second invention, the busbar connection portion includes a positioning ring that receives and fits the conical portion formed at the joint portion of the divided bushing pieces, and positions the divided bushing pieces. It is characterized by.
The third invention surrounds the entire connection portion including the bus bar connecting portion, and includes a bushing divided by a plane including the bus bar, an elastic insulator sandwiched between the bushing divided surfaces, and the divided bushing. The present invention relates to a bus connecting portion, comprising: a fixing member that integrates a split surface while pressing the split surface.
[0008]
[Action]
The bushing and the portion for connecting the buses that constitute the bus connection portion are configured to be dividable as a whole. Therefore, the buses can be connected to each other and the bushing can be assembled without moving the buses in the longitudinal direction. The divided bushing pieces are accurately positioned by a positioning ring and integrated by a fixing member.
[0009]
【Example】
Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings.
FIGS. 1A and 1B show an embodiment of a bus connecting portion according to the present invention, wherein FIG. 1A is a longitudinal sectional view thereof, and FIG. 1B is a sectional view of a main portion thereof along the line AA.
The bus connecting portion in the figure is for electrically connecting the pair of left and right buses 3 to each other. The entire branch connecting portion is surrounded by a bushing 11, and the bushing 11 is vertically divided into two parts by a dividing surface 10 shown in FIG.
[0010]
The conductor 4 exposed from the end of the cable-like bus 3 is electrically connected to the internal electrode 12 inside the bushing 11. In this embodiment, the internal electrode 12 electrically contacts the lower half of the conductor 4 and the half sleeve 13 contacts the upper half of the conductor 4. The half sleeve 13 is provided with a bolt hole 13-1. The bolt 14 inserted therein is screwed into the bolt hole 12-1 of the internal electrode 12, whereby the half sleeve 13 and the internal electrode 12 are separated. It has an integrated configuration. A guard electrode 15 is provided inside the upper half of the bushing 11 for electrical protection.
[0011]
An insulating spacer 17 is fitted into an end of the bus bar 3 to fill a gap generated between the bus bar 3 and the bushing 11. The insulating spacer 17 is made of insulating rubber or the like. In order to maintain the airtightness of the end of the insulating spacer 17, a seal portion 18 is provided, which is arranged so as to strongly grip the outer skin of the busbar 3.
A conical portion 11-1 is formed at both ends of the bushing 11 so as to sandwich the divided surface 10, and a positioning ring 20 that fits into the conical portion 11-1 is fitted therein. .
[0012]
Further, an elastic insulator such as an insulating rubber 21 is sandwiched between the divided surfaces 10 of the bushing 11 as shown in FIG. When the bushing 11 is assembled as shown in FIG. 1 (b), the insulating rubber 21 applies a certain pressure or more to each other at the part of the dividing surface 10 to enhance the adhesion and secure the electrical insulation. Is provided. With such a configuration, the bushing 11 can be divided.
[0013]
When the bus 3 is 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 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. Thereafter, the half sleeve 13 is fixed with the bolts 14 and the bushing 11 is integrated to complete the connection operation. Therefore, such a connection operation is sufficiently simplified as compared with the related art.
[0014]
In addition, for such a purpose, the configuration of the dividing surface 10 of the bushing 11 may have various other modes.
FIG. 4 is an explanatory diagram of a bushing dividing method of a bus connecting portion according to the present invention.
For example, as shown in FIG. 4A, the bushing 11-5 is simply divided into upper and lower parts, and a plate-like insulating rubber is sandwiched between the boundary surfaces 10-1.
Also, as shown in (b), the bushing 11-6 is divided into upper and lower parts, and the divided surface is made wavy, and a similar insulating rubber is sandwiched therebetween. In the example of (c), the division surface 10-4 is formed on a surface that does not pass through the axis of the generatrix. Also in this case, the insulating rubber is also sandwiched between the divided surfaces. Further, in the example of (d), the bushing 11-8 is divided into three by three division surfaces 10-5. As described above, the bushing can be divided by two or more free surfaces. In particular, in the case of a large bushing, it is preferable to adopt such a multi-segment configuration.
[0015]
Next, in the embodiment of (e), the upper half of the bushing 11-9 divided into two has a substantially mountain-shaped cross-sectional shape, and the divided surface 10-6 is formed in a somewhat parabolic shape. Even in such a shape, the upper part of the bushing 11-9 is opened, and the bus bar connection portion can be accommodated in the bushing while being translated from above. The same applies to the case of FIG. 11F, which has a cross-sectional configuration that is exactly upside down from the embodiment shown in FIG. In the case of the bushing 11-10, when the upper half is removed, the connecting portion of the bus bar is widely opened. Therefore, with such a configuration, it is possible to adopt a method such as compression connection without using the half sleeve as shown in FIG.
[0016]
(G) shows the bushing 11-11 in which the division surface 10-8 is formed so that the cross section becomes just a sector. The operation is the same as (e) and (f).
Further, in the examples so far, the cross sections of the bushings are all circular, but the cross section of the bushings may be rectangular as shown in FIG. Although the dividing surface 10-9 of the bushing 11-12 of this embodiment is linear, the dividing surface may be a curved surface as shown in FIGS. 9A to 9G or may be appropriately inclined. Absent.
[0017]
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 divided into upper and lower parts, and is integrated simply by using a band 23. However, when such a band 23 is used, the divided surface of the bushing 11 cannot always be accurately positioned.
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 a positioning ring 20 fitted to the conical portions 11-1 is provided. Thereby, the divided upper and lower portions of the bushing 11 are accurately positioned and integrated. Therefore, in this case, for example, bolts and other components for integrating the bushing 11 can be omitted.
[0018]
FIG. 6 shows an embodiment of a fixing member for fixing and integrating the divided bushings. (A)-(f) all show the fixing member viewed from the end face side of the bushing.
In the embodiment shown in FIG. 4A, the bushing 11-5 is of the embodiment shown in FIG. In this case, a band-shaped saddle 25-1 is used for fixing and integrating the upper and lower divided bushings 11-5, and both ends thereof are fixed to a base (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 FIG. 7B, a rib 27 is provided on a side surface of the upper half of the bushing 11-13. The rib 27 is pressed by a key-shaped fixing member 25-2 and tightened by a bolt 26-1.
[0019]
In the embodiment shown in FIG. 6C, the ribs 27 are provided on the side surfaces near the divided upper and lower surfaces of the bushing 11-14. A bolt 25-3 is provided so as to penetrate the rib 27, and the two are fastened and integrated. In the embodiment shown in FIG. 4D, a rib 27 is provided on the side surface of the upper half of the bushing 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 upper half rib 27 and be screwed into the upper side surface of the lower half. By these, the bushings 11 to 15 are integrated.
[0020]
In the embodiment of (e), a saddle 25-5 is provided such that the saddle 25-1 of the embodiment of (a) is divided into two. Both are tightened by bolts 26-2 to increase the tightening force of the bushings 11-16. Therefore, there is no need to adjust the tightening force of the bolt 26-1. In (f), the lower half of the bushing 11-17 is trapezoidal, and the rib 28 is provided on the upper part. The saddle 25-6 has a C-shape, and its center is divided into two parts. The bolt 26-2 tightens the saddle 25-6 so as to apply a sufficient pressure to the divided surface of the bushing 11-17. With the above configuration, the bushing can be integrated while applying an appropriate pressure to the elastic insulator sandwiched between the divided surfaces of the divided bushing.
[0021]
The present invention is not limited to the above embodiments.
In the above embodiment, the bus connecting portion is described as a T-branch type. However, for example, a similar configuration can be adopted for a Y-branch or L-type branch or a straight connecting portion. The busbar may have a structure similar to that of a conventional ordinary power cable, or may have a flat cross section instead of a round cross section. Also, the shape and length of the internal electrode and the half sleeve, and the configuration for connecting the two may be freely changed as long as they have the same function. Furthermore, the elastic insulator sandwiched between the divided surfaces of the bushing is not limited to insulating rubber, and may be, for example, insulating plastic.
[0022]
【The invention's effect】
The bus connecting portion of the present invention described above has a structure in which electrodes and bushings for electrically connecting the buses to each other can be divided as a whole, so that the connecting portion can be easily completed without moving the bus in the longitudinal direction. can do. Therefore, the connecting part assembling work is simplified, and the working time can be shortened. Further, even in a case where three or more such bus connection portions are arranged side by side, it is possible to dismantle only an arbitrary bus connection portion individually, and to perform maintenance management, accident recovery, and the like, This type of work becomes easier. Furthermore, if the bushings divided by the positioning ring are integrated, the positioning of each divided piece of the divided bushings becomes easy and accurate.
In addition, the bushing divided surface is pressed by the fixing member to integrate the bushing, thereby maintaining its electrical characteristics. Furthermore, there is an effect that various connection operations can be performed within the range of the length of the bus bar.
[Brief description of the drawings]
FIGS. 1A and 1B show an embodiment of a bus connecting portion of the present invention, in which FIG. 1A is a longitudinal sectional view thereof, and FIG. 1B is a sectional view of a main portion thereof along line AA.
FIG. 2 is a perspective view of a conventional general bus 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 a bus connecting portion according to the present invention.
FIG. 5 is an explanatory diagram of an effect of a positioning ring that integrates a bushing.
FIG. 6 is an end view of an embodiment of a fixing member for integrating a bushing of the present invention.
[Explanation of symbols]
3 bus bar 4 conductor 11 bushing 11-1 conical portion 12 internal electrode 13 half sleeve 14 bolt 20 positioning ring 25-1 fixing member

Claims (3)

And internal electrodes for electrically interconnecting bus,
A half sleeve detachably attached to the internal electrode and holding the busbar conductor together with the internal electrode;
A bushing surrounding the entire branch connection portion including the bus bar connection portion and divided by a plane including the bus bar. 2. The busbar connection according to claim 1, further comprising a positioning ring that receives and fits the conical portion formed at the end of the bushing that sandwiches the divided surface and positions the divided bushing. A bushing surrounding the entire connection portion including the bus bar connection portion and divided by a plane including the bus bar;
An elastic insulator sandwiched between the bushing split surfaces,
A bus connecting part, comprising: a fixing member that integrates the divided bushings while pressing the divided surfaces.

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