JPS6031190Y2 - Connection device for electrical equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connection device that electrically connects two connected parts of an electrical device.

When electrically connecting connected parts in electrical equipment such as gas-insulated switchgear or transformers, if relative displacement is expected to occur between the connected parts, double-wave joints are used. It is necessary to connect them using a flexible conductor.

Braided wire is an example of a flexible conductor, but because the mechanical shape of braided wire is inconsistent, it is difficult to maintain a constant electric field distribution around it, making it difficult to use in equipment that applies high voltage. is not suitable.

Therefore, in the past, a roughly U-shaped flexible conductor made of an elastic conductor plate was used, both ends of which were bolted to the connected part of the equipment, and a shield fixed to one connected part was used to secure the ends of the connected part. A connecting device was used that covered the vicinity and the entire flexible conductor.

In this connection device, it is necessary to cover the flexible conductor with a shield after bolting the flexible conductor to the connected part, and to make this possible, the shield is assembled by dividing it into two parts. Then, fit a cylindrical shield around the outer periphery of one connected part and attach the flexible conductor with the shield retracted from the flexible conductor, and then move the shield body to the other connected part side. It has been proposed that the conductor be slid to a position that completely covers the conductor and then fixed to one of the connected parts.

However, the former structure has the disadvantage that it is difficult to assemble and fix the two divided shields together, and the latter structure does not require enough space to retract the shield to one connected part side. The drawback was that it could not be implemented without it.

Furthermore, in the conventional connection device described above, the shield is structured to cover the entire flexible conductor and the vicinity of the ends of the connected parts, so it is necessary to provide a margin in the dimensions of the shield to allow for displacement between the connected parts. This has the disadvantage that the diameter of the shield inevitably increases due to the need to hold the shield, and the device becomes bulky.

Furthermore, in conventional connection devices, since the flexible conductor is formed in a U-shape, it is difficult to deform in directions other than the direction in which the U-shape is expanded, and the amount of deflection is not large enough.
This method has the disadvantage that it cannot completely accommodate displacement between individual connected parts.

An object of the present invention is to propose a connecting device for electrical equipment that can completely cope with displacement between connected parts, and also has a small shield and a simple mounting structure.

In order to further achieve the above object, in the present invention, a flexible conductor is formed in a two-character shape, and end plate portions at both ends of the flexible conductor, which are substantially parallel to each other, are fixed to opposing surfaces of a connected portion of a device.

Further, the shield bodies are arranged individually near both ends of the visible conductor so as to cover only the vicinity of both ends of the flexible conductor, and are arranged coaxially with each other and fixed to the connected portion.

The flexible conductor is formed such that the center portion of its inclined plate portion intersects the central axes of both shield bodies near the approximate center between the two shield bodies.

With the above configuration, the potential gradient near the middle part of the flexible conductor can be reduced, so that a shield covering the middle part of the visible conductor can be omitted.

In addition, since the flexible conductor can be installed with each shield body fitted to the double-shaped flexible conductor, a space is secured on the side to be connected to which the shield body can be evacuated. There is no need to keep it in place, and the device can be made smaller.

Furthermore, since each shield does not need to be constructed in two parts, the structure for mounting the shields can be simplified.

Furthermore, since the flexible conductor is double-shaped, it can be bent more than a U-shaped flexible conductor, and the allowable displacement of the two connected parts can be increased.

Embodiments of the present invention will be described in detail below with reference to the drawings.

Figure 1 shows any two connected parts IA in electrical equipment.
This figure shows an embodiment of the connection device of the present invention that electrically connects IB and IB to each other.

These connected parts IA and IB have their respective opposing ends formed in a cylindrical shape and are arranged approximately coaxially, and the outer periphery of the tip of both wave connecting parts is equal to the plate thickness of the shield body, which will be described later. By cutting the shield body mounting portions 11A, 1
1B is formed.

2 is a Z-shaped flexible groove formed by laminating a predetermined number of elastic conductive plates made of copper or the like shaped into two shapes, as shown in FIG. Plate parts 21A and 21B are connected parts IA and IB, respectively.
are in contact with opposing surfaces 12A and 12B of.

Two mounting holes 22 are provided in each of the end plate portions 21A and 21B of the flexible conductor 2, and screw holes 1 that match the respective mounting holes in the end plate portions 21A and 21B are provided on the opposing surfaces of the connected portions IA and IB.
3 is open.

In addition, the connected portion I of the end plate portions 21A and 21B of the flexible conductor 2
There are presser plates 3A and 3 on the opposite sides of A and IB, respectively.
These presser plates are also formed with mounting holes 31 that match the mounting holes 22.

And each mounting hole 31 of presser plate 3A, 3B, end plate part 21A
, 21B, the bolt 7 is inserted into the threaded hole 13 through each mounting hole 22.
The end plate portions 21A and 21B are thereby fixed to the connected portions IA and IB, respectively.

Note that 5 is a spring washer interposed between the head of each bolt 4 and the holding plates 3A, 3B.

The holding plates 3A and 3B each hold the end plate portion 2 of the flexible conductor 2.
The ends located on the corner portions 24A and 24B between 1A and 21B and the inclined plate portion 23 have curved portions 32A and 32B that are curved toward the inclined plate portion 23, and these curved portions allow the flexible conductor to be The corners 24A and 24B of the flexible conductor are prevented from being bent below a predetermined curvature to prevent breakage of the flexible conductor.

Note that 25 is a rivet that tightens the inclined plate portion 23 of the flexible conductor 2 in the stacking direction near the center thereof, and a plurality of these rivets may be provided.

Annular shields 6A and 6B for electric field relaxation are provided near both end plates of the flexible conductor 2, particularly to cover bolts and the like at the joints with the connected parts IA and IB.

Each shield body consists of a cup-shaped body with a smooth outer surface and a hole 61 formed at the bottom for passing the flexible conductor 2 through, and the shield bodies 6A and 6B are connected to connected parts IA and IB, respectively. Shield body mounting part 11A and II
B, and the punch lock portions 62 provided at multiple locations (for example, 4 equally spaced) in the circumferential direction connect the connected portion I.
It is fixed at A and IB.

In the present invention, the dimensions and shapes of each part are adjusted so that the central part of the inclined plate part 23 of the flexible conductor 2 intersects the central axis P of the shield bodies 6A, 6B at approximately the center between the shield bodies 6A, 6B. The positional relationship is set.

With this configuration, the potential gradient near the middle part of the flexible conductor 2 can be reduced, so there is no need for a shield covering the middle part of the flexible conductor 2. It is sufficient to provide the shield body so as to cover only the nearby bolts, presser plates, etc. that have a shape that disturbs the electric field.

In addition, if a shield body is provided for each connected part in this way, there is no need to provide an allowance for the dimensions of the shield body in consideration of the amount of displacement between the connected parts. It becomes possible to reduce the diameter of portions IA and IB, and it is possible to downsize the connecting portion of the device.

When the flexible conductor 2 is formed into a double shape as described above, the flexible conductor can be easily deformed also in the twisting direction, so that the flexible conductor can be deformed in all directions.

Therefore, even if the connected parts 1A, 1B are displaced in any direction, the displacement can be followed, and the connecting device can be prevented from being damaged due to the displacement of the connected parts.

Also, when installing the flexible conductor 2, each shield body 6A,
6B fitted to the flexible conductor 2, the connected parts IA, I
B, and then fit the shield bodies 6A and 6B to the connected parts IA and IB after bolt tightening is completed. There is no need to reserve space.

Therefore, the present invention can be applied even when the lengths in the axial direction of the connected portions IA and IB are small.

The center part of the inclined plate part 23 of the flexible conductor 2 is the shield body 6A.
, 6B need not be exactly at the center between the two shields, and may be slightly shifted as long as the potential gradient near the middle part of the flexible conductor is not increased.

Moreover, the holding plates 3A and 3B can be omitted depending on the case.

As described above, according to the present invention, there is no need for a shield covering the intermediate portion of the flexible conductor, and the radial dimension of each shield body and the radial dimension of the conductor at the connected part can be reduced. , the structure of the connection part of the device can be simplified and the device can be made smaller.

Further, since the amount of deflection of the flexible conductor is increased and the flexible conductor can be deformed in all directions, the connection portion can be completely protected against relative displacement of the connected portion.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a side view showing an example of a flexible conductor used in the present invention. IA, IB... Connected part, 2... Flexible conductor, 2IA, 21B... End plate part, 23...
...Slanted plate part, 6A, 6B...Shield body.

Claims (1)

[Scope of utility model registration request] A connection device for electrically connecting two connected parts of an electrical device, a flexible conductor disposed between the two connected parts and having both ends fixed to opposing surfaces of the two-wave connecting parts; two annular shield bodies for electric field relaxation arranged approximately coaxially and fixed to the two connected parts respectively and formed so as to respectively surround both end portions of the flexible conductor; The flexible conductor is formed into a Z-shape integrally having a pair of substantially parallel end plate portions and an inclined plate portion extending obliquely between the both end plate portions, and the both end plate portions are opposite to the double wave connecting portion. The flexible conductor is fixed to a surface, and the central part of the inclined plate part of the flexible conductor is formed so as to intersect with the center axis of both the shield bodies near the approximate center between the shield bodies. Connection device for electrical equipment.