JPS5837767B2 - Insulated conductor connection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an insulated conductor connection device that safely connects oil-filled electrical equipment and gas-filled electrical equipment without exposing them to the atmosphere.

In general, the positive forces of the insulating media at the connection parts between oil-filled electrical equipment and gas-filled electrical equipment are different. In order to take countermeasures before a serious problem occurs, we use oil-filled and gas-filled bushings with mounting flanges on the oil-filled and gas-filled electrical equipment sides, and even if there is a gas leak, it will be possible to prevent it from entering the oil-gas bushing. Many structures that can be detected are adopted.

Furthermore, oil-filled electrical equipment and gas-filled electrical equipment may be affected by each other when a short circuit occurs, an earthquake occurs, or the vibrations of the equipment itself occur.

Further, during installation, a telescopic portion is generally provided due to the necessity of adjusting the position of the connecting portion.

In the conventional insulated conductor connection device, as shown in FIG.
and fixed with support fittings 7 via gaskets 6 to both end surfaces of the insulating tube 5 on the gas insulated electrical equipment side.
On the oil-filled electrical equipment side, a coil spring 11 compressed in the head assembly 10 applies a compression force to the insulator tubes 5 and 8, the mounting flange 3, and the metal fittings 4 through gaskets 9 on both end surfaces of the insulator tube 8. It has an added configuration.

In addition, when a ring type current transformer 13 is installed between the mounting flange 3 and the insulator 2 of the center conductor 1 and installed horizontally, it is possible to prevent gas from entering the conservator 12 and inside as shown in the figure. A gas detector is installed for early detection.Furthermore, the fitting 4 and the oil-filled electric Equipment side flange 20
A bellows 21 is installed in between, and a connecting tank 15 that is slightly longer than the length of the energized part is attached to the flange 20.
It has a structure in which a connecting tank 15 is fixed to a flange 3.

The insulated conductor connection device configured in this way is connected to the current transformer 13.
Since the bellows 21 is housed in the mounting flange, the length is not very long, but the bellows 21 needs to have an appropriate length to ensure the amount of expansion and contraction, so the overall length is long.

Therefore, the diameter of the bellows 21 was increased and the communication tank 15
Although it is possible to shorten the axial length of the part of the metal fitting 4 where the bellows is installed by attaching it to the part of It had the disadvantage of being expensive.

This invention is an attempt to eliminate the drawbacks of the conventional products, and utilizes the fact that the ball force used in oil-filled electrical equipment is close to the positive atmospheric pressure, and there is no need for shell resistance. The present invention uses a certain diaphragm to provide a short and inexpensive insulated conductor connection device.

An embodiment of the present invention will be described below based on FIG. 2.

That is, in FIG. 2, 1 is a center conductor with an insulator 2 around it, 3 is a mounting flange, 4 is a metal fitting attached to the mounting flange 3, and 5 is a center conductor 1 attached to the mounting flange 3 via a gasket 6. A paddle tube 8 is fixed by a support fitting 7 screwed into the metal fitting 4 through a gasket 9 and is pressed and fixed to the fitting 4 by a coil spring 11 compressed within the head assembly 10.

Here, the insulator tube 5 and the mounting flange 3 are brought into contact with each other by the coil springs 11.

12 is a ring-shaped current transformer housed in the mounting flange 3, and 14 is a connecting tank mounted on the gas-insulated electrical equipment side of the mounting flange 3; A connecting tank 17 is attached to the oil-filled electrical equipment side of the mounting flange 3 so that its mounting dimensions can be adjusted using adjustment bolts 16. is a donut-shaped wavy diaphragm which is held between the end surface of the connecting tank 15 and the holding fitting 18 with a gasket 19 interposed therebetween.

Here, in both FIGS. 2 and 3, the dimension adjustment bolts 16 are used to fix the connecting tank from after assembly to installation of the device, and needless to say, they are removed after installation is complete.

With this structure, the diaphragm 17 provides the same elasticity as the conventional one, making it easier to adjust dimensions during installation and prevent vibrations between devices. can cheat,
This has the effect of providing a short and inexpensive device.

In the case of a three-phase all-in-one type, as shown in Figure 4, the conductor part should be the same as in the single-phase case, and the three-phase
Through holes are provided at intervals that allow the conductor parts of the set to maintain an insulation distance, and a diaphragm 17 is installed for each phase in the same way as for a single phase, and is held at the end of the three-phase connection tank 15 via a gasket 19. The diaphragms are fixed using gold 18 and dimension adjustment bolts 16, and the diaphragms are connected to each other using presser feet 18.

The structure is such that a three-phase connection tank 14 is also attached to the gas insulated equipment side.

With this structure, it is possible to obtain an insulated conductor connecting device that is short in length and inexpensive even in the case of three phases at once, as in the case of single phase.

Note that the same effect can be obtained even if a single diaphragm having a hole with an inner diameter that allows the three-phase central conductor 1 to pass through is provided between the connecting tank portion and elasticity.

As described above, the insulated conductor connection device according to the present invention arranges a center conductor surrounded by an insulator between oil-insulated electrical equipment and gas-insulated electrical equipment, and a pipe that supports this center conductor. A diaphragm is interposed between the tank and the connecting tank on the oil-filled electrical equipment side, and the shaft length is short, making it simple and inexpensive.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a conventional insulated conductor connection device of this type.
FIG. 2 is a sectional view showing one embodiment of the invention, and FIG. 3 is a sectional view showing another embodiment of the invention. In the figure, 1 is a core conductor, 2 is an insulator, 3 is a mounting flange, and 4
1 is a pot tool, 5, 8 is a peeling pipe, 14.15 is a connecting tank, 1
7 is a diaphragm. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] 1. A central conductor placed between oil-filled electrical equipment and gas-insulated electrical equipment for connection therebetween and having an insulating material applied to the periphery, a paddle tube supporting this central conductor, and An insulated conductor connection device comprising a diaphragm provided between a paddle pipe and a connection tank of the oil-filled electrical equipment. 2. The insulated conductor connection device according to claim 1, wherein the diaphragm is formed in a wave shape. 3. The insulated conductor connection device according to claim 1 or 2, wherein a plurality of center conductors are arranged at intervals in a common connection tank.