JPS6257204A - Stationary induction machine - Google Patents

Abstract

PURPOSE:To improve a noise preventing effect, by accommodating a bus-line duct in a pit formed in an underground part, and connecting one end of the bus-line duct and a bushing pocket in a soundproof tank by way of an oil-gas bushing. CONSTITUTION:One end of an oil-gas bushing 4 is connected to a bushing pocket 3, which is protruded and formed from the side surface of a transformer main body 1. The other end of the oil-gas bushing 4 is connected to a bus-line duct 5 in a soundproof tank 12. The other end of the transformer main body 1 is guided into a pit 9, which is formed in the underground part of a foundation surface 10 and connected to a duct 7 of other machine such as a gas insulated switching apparatus and the like through a flexible pipe 6 in the pit 9. In this constitution, noises do not leak to the outside through the bushing picket 3. Even in a high-voltage machine and three-phase combined bushing, the noise do not occur.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention covers the main body of a stationary induction electric device with a soundproof tank to prevent noise, and connects other equipment installed outside the soundproof tank through a bushing pocket. Regarding stationary induction electric equipment.

[Technical background of the invention and its problems] During operation of stationary induction electrical equipment such as transformers and accelerators, noise is generated from the main body of the equipment, which propagates through the oil and is radiated to the outside from the tank. Particularly when this noise is a problem, the main body of the stationary induction electric appliance is covered with a soundproof tank to prevent the noise from leaking outside.

On the other hand, the stationary induction appliance is electrically connected to other equipment installed outside the soundproof tank, such as a gas insulated switchgear. A conventional example of this connection structure is shown in FIG. In the figure, 1 is, for example, a transformer body, which is surrounded by a soundproof tank 2. 3 is a bushing pocket formed protruding from the side of the transformer body, and a hole 2a formed in the soundproof tank 2
It penetrates and is pulled out to the outside. One end of an oil-gas bushing 4 is connected to the bushing pocket 3.
The other end of the gas bushing 4 is connected to a busbar duct 5. Further, the busbar duct 5 is connected via a flexible tube 6 to a duct 7 of a communication device such as a gas insulated switchgear. The part where the bushing pocket 3 penetrates the soundproof tank 2 is the hole 2a
It is covered with a diaphragm 8 etc. to prevent noise from leaking.

Another configuration that has been considered is one in which the bushing pocket 3 shown in FIG. 2 is raised externally from the top surface of the soundproof tank 2 and connected to external equipment using a similar structure. However, in either configuration, the diameter of the bushing pocket of a high-voltage device or a bushing pocket of a three-phase all-in-one type is large, and there is a problem in that noise leaks to the outside through this bushing pocket. Furthermore, even though the penetration portion of the bushing pocket 3 is covered by the diaphragm 8, in the case of large noise, the noise leaks through the diaphragm 8, which is a problem. Furthermore,
Another drawback was that the space occupied by these bushing pockets and busbar ducts increased the installation space.

[Object of the invention] The present invention eliminates the above-mentioned drawbacks, solves the problem of noise leaking from the bushing pocket and the soundproof wall penetration part of the bushing pocket, improves the noise prevention effect, and reduces the installation space. The purpose is to obtain induction electric appliances.

[Summary of the Invention] In order to achieve the above-mentioned objects, the present invention accommodates a busbar duct in a pit formed underground, and connects one end of the busbar duct to a bushing pocket through an oil-gas bushing in a soundproof tank. This eliminates the soundproof tank penetration part of the bushing socket T-, and also eliminates the installation of these bushing pockets and ducts on the ground, reducing noise and installation space.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In Figure 1, 1 is the transformer main body, and the surrounding area is the soundproof tank 2.
The transformer main body 1 is covered by the transformer main body 1 to insulate the noise from the transformer body 1. Reference numeral 3 denotes a bushing pocket formed protrudingly on the side surface of the transformer main body 1, and its tip is bent downward within the soundproof tank 2. One end of an oil-gas bushing 4 is connected to this bushing pocket 3, and the other end of the oil-gas bushing 4 is connected to a busbar duct 5 within the soundproof tank 2. The other end of the busbar duct 5 is guided into a pit 9 formed underground on the foundation surface 10 where the transformer body 1 is installed, and in this pit 9, communication equipment such as gas insulated switchgear is connected via a flexible pipe 6. It is connected to duct 7. The duct 7 penetrates the foundation surface 10 from within the pit 9 and is raised above the ground. This pit 9 and soundproof tank 2
It is partitioned off from the inside by a partition plate 11 formed on the busbar duct 5.

With this configuration, the bushing pocket 3 is not led out to the outside of the soundproof tank 2.
This prevents noise from leaking to the outside through the system, so no noise problems occur even with high-voltage equipment or three-phase bushings. Further, since there is no penetration part in the soundproof tank 2 of the bushing pocket 3, there is no possibility of noise leaking from this penetration part, and further noise reduction can be achieved. Moreover, since the bushing pocket 3, busbar duct 5, duct 7, etc. are housed in the underground pit 9, the pedestal etc. that support them do not come out above ground, and the installation space for the transformer can be significantly reduced.

[Effects of the Invention] As described above, according to the present invention, a bus duct is housed in a pit formed underground, and one end of the bus duct and a bushing pocket are connected through an oil-gas bushing in a soundproof tank. As a result, the soundproof tank penetration part of the bushing pocket is eliminated and the installation of these bushing pockets and ducts on the ground is stopped, so it is possible to obtain a stationary induction electric appliance with improved noise prevention effect and a reduced installation space.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view showing a conventional static induction appliance. 1...Transformer body, 2...Soundproof tank, 3...Pushing pocket, 4...Oil-gas bushing,
5... Busbar duct, 6... Flexible pipe, 7... Duct, 9... Pit. Applicant's agent Patent attorney Takehiko Suzue -〇- Figure 2

Claims (1)

[Claims] The stationary induction electric appliance body is covered with a soundproof tank, the bushing pocket led out from the stationary induction electric appliance body is connected to a bus duct via an oil-gas bushing, and the bus duct is further connected to other equipment installed outside the sound insulation tank. A stationary induction electric appliance connected to a duct, characterized in that the bus duct is housed in a pit formed underground, and the bushing pocket and the bus duct are connected via an oil-gas bushing in a soundproof tank. Induction electric appliance.