JPH0132335Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to the connection of electrical conductors, and more particularly to a connection device for a conductor passing through a removable cover of a tank.

[Conventional technology]

Historically, one of the problems in transformer assembly operations has been that, at the end of the assembly operation, when the tank cover is finally placed on top of the transformer tank, the leads may be exposed to other electrical conductors such as high voltage leads. Or, be sure not to place it too close to the low voltage lead wire or ground wire.
The purpose was to reduce the lead wire slack and make the final electrical connection to the high voltage bushing attached to the cover.

In this regard, there has also been a need for a more efficient way to quickly make a connection between the leads and the bushings after the cover has been brought into close proximity to the predetermined location. The requirements for such a connection device are to provide a reliable electrical connection while maintaining the ability to adjust the length of the lead wire to minimize lead slack and to maintain visibility of the terminal within reach. must be included.

[Summary of this idea]

According to this invention, there is provided a tank having a removable cover, a first electrical conductor placed in the tank extending towards the cover, a second electrical conductor extending into the tank through the cover, and a second electrical conductor extending into the tank through the cover. A connector is formed of a nut having a center hole and a compression ring, which connects the first conductor and the second conductor of the nut, and the center hole of the nut has a thread formed partway from one end. , an unthreaded part is formed from the other end to just before the screw, and a tapered shoulder part is sandwiched between the threaded part and the unthreaded part, and the ring is placed on this shoulder part. , one end of the conductor is inserted from the side of the unthreaded portion of the center hole, the other end of the conductor is screwed to the threaded portion of the center hole, and its terminal portion is inserted into the tapered portion of the center hole. Some of the conventional problems have been solved by providing a connector that presses against the shoulder and pushes the first conductor diagonally so that the two conductors are joined in good conductivity. I found out that

The advantage of the structure of this invention is that it can be easily disassembled and reassembled within a limited area.
It also provides a highly reliable electrical connection with minimal lead wire slack in the interconnected conductors.

〔Example〕

In Figure 1, the transformer 5 is connected to the tank 7 and cover 9.
and an electric device 11. Although this electrical device 11 can be any electrical device comprising electrical conductor lines, a transformer is shown here as the most suitable example.

The tank 7 is a cup-shaped member having a bottom 13 and an open portion at its upper end covered by a tank top or cover 9 which is easily removable and is fitted in a fluid-tight manner to its upper edge portion 15.

As an example of an electrical device, a transformer 11 with a core 17 and a winding 19 is placed on the base 13. Extending upwardly from the winding 19, separated from each other by a guide 25, are two leads or first conductors 21 and 23. The cover 9 of the tank 7 is provided, as usual, with a pair of bushings 27 and 29, the second conductors 31 and 33 passing through each bushing 27 and 29 being insulated from the cover 9. .

These second conductors 31, 33 are connected to their corresponding first conductors 21, 23 by coupling means, ie, connectors 35. This condition is shown in FIG. 2 for the first conductor 23 and the second conductor 33. This connector 35 is connected to the main body 3
7 and a compression ring 39. The main body 37 has a center hole, and this center hole has a threaded part 41 provided with a screw, and a non-threaded part 4 not provided with a thread, which has a diameter smaller than the diameter of this threaded part.
3 and the shoulder portion 4 between the threaded portion 41 and the non-threaded portion 43
5 is provided. The shoulder portion 45 is tapered to form a slope. A compression ring 39 is placed on the slope of this shoulder. compression ring 3
9 has an inner diameter slightly larger than the diameter of the first conductor 23, and when connecting the first and second conductors,
The first conductor can be easily inserted and slid. Second conductor 3 on bushing side
3 has a tubular end portion, into which the first
When the tip of the first conductor 23 is inserted and the cover is placed on the tank, no excess first conductor remains.

To state this more specifically, the extra length of the first conductor can be pushed into the hollow tubular portion of the second conductor prior to fitting the cover of the tank. In this way, excess slack in the first conductor can be removed. When the appropriate slack has been formed in the first conductor, the main body 37 of the connector is slid into alignment with the lower end of the second conductor 33 and the connector is advanced upwardly by means of a screw connection. Eventually, the lower end of the second conductor presses the compression ring 39 against the slope of the shoulder 45, whereupon the compression ring grips the first conductor tightly to provide a good electrical connection. As mentioned above, it is preferable that the excess portion of the first conductor is inserted into the tubular part of the second conductor, but instead of having the tubular part at the lower end of the second conductor, It is also possible to abut the upper end of the first conductor at line 47 in FIG. 2 to act on compression ring 39.

Another embodiment of the connector is shown in FIG. In this figure, parts with the same reference numerals as in FIG. 2 are the same or similar to the parts described above. In this embodiment, like the first conductor 23, the lower end of the second conductor 49, which is a bushing conductor, is inserted into the first conductor 51 extending from the winding 19. The main body 37 of the connector is oriented upside down compared to that shown in FIG. Therefore, when the main body 37 is tightened to the tubular first conductor 51 using the threaded portion 41, the compression ring 37 is pressed against the upper end of the first conductor 51 and compressed, and the second conductor 49 is compressed.
A tight connection with good electrical contact will be obtained.

In either embodiment, the outer shape of the body 37 can be hexagonal, suitable for wrench operation, or butterfly nut-shaped, suitable for hand tightening.

After the connector 35 is tightened in the appropriate position, the cover 9 is fixed on the tank 7, and the insulating cooling fluid 53 (the first
Figure) In other words, transformer oil is introduced.

[Effect of idea]

By utilizing the electrical device connection device of this invention, the length of the conductor is shortened and short circuit accidents caused by contact of the conductor with nearby electrical elements or the inner surface of the tank are avoided. To connect the bushing conductor, which is the second conductor, and the lead wire of the electrical equipment, which is the first conductor, first leave a gap between the tank cover and the upper edge of the tank for the worker's arm to fit into the bushing. The attached cover is placed above the tank, the first conductor and the second conductor are combined as described above, the connector body is tightened, and the cover is fixed onto the tank to complete the process.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of an electrical device in which the electrical device connecting device of this invention is used, Fig. 2 is a sectional view of an electrical device connecting device of an embodiment of this invention, and Fig. 3 is another example of this device. FIG. 7...tank, 9...tank cover, 21,2
3...first conductor, 31, 33...second conductor,
35... Connector, 37... Main body, 39... Compression ring, 41... Threaded part, 43... Threadless part,
45...Shoulder.

Claims (1)

[Claims for Utility Model Registration] (1) A tank having a removable cover; an electrical device provided within the tank having a first conductor extending toward the cover; The second one extends into the tank.
a conductor, a connector having a main body having a center hole for connecting the first conductor and the second conductor, and a compression ring, the center hole having a threaded portion and a diameter smaller than the threaded portion. has a small unthreaded portion and a tapered shoulder between the threaded portion and the unthreaded portion, the compression ring resting on the shoulder, and one of the first and second conductors; is disposed within the unthreaded portion of the center hole, and the other conductor is threadedly coupled to the threaded portion of the center hole to compress the compression ring against the shoulder to create a good electrical connection between the conductors. Connecting device for electrical devices. (2) The connecting device for an electrical device according to claim 1, wherein the second conductor is a tubular member, and the first conductor extends within the second conductor. (3) The connection device for an electrical device according to claim 1, wherein the first conductor is a tubular member, and the second conductor extends within the first conductor.