JPS6334401Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to the improvement of an electrical device in which electrical devices containing different media are directly connected at the installation site.

[Prior art] For example, gas-filled electrical equipment such as insulation, disconnectors, disconnectors, and lightning arresters filled with inert gas as a medium for insulation, arc extinguishing, and cooling, and transformers and reactors that use oil as a medium. Electrical devices that are directly connected to oil-filled electrical equipment are widely used in power substation equipment and the like.

Hereinafter, taking as an example an electrical device in which a gas filler or disconnector is directly connected to an oil-filled transformer, the configuration of a conventional example thereof will be explained with reference to a front sectional view schematically shown in FIG.

In the figure, 1 indicates a first medium in which a first medium is enclosed.
2 is a first medium, ie oil, sealed in the outer box 1 of an electrical device such as an oil-filled transformer;
3 is a △-Y connected transformer immersed in oil 2, 4
5 is a secondary bushing attached to the upper plate of the main body outer box 1, 5 is a primary bushing attached to the upper plate of the main body outer box 1 by penetrating it, and 6 is a secondary bushing in which the second medium is sealed. The electrical equipment 2, such as a gas filler or disconnector, is attached at one end by welding to the upper plate of the main body outer box 1 so as to surround the primary bushing 5, and the other end is a gas filler or disconnector. A gas chamber 8 attached to the disconnector 6 by welding is a second medium, that is, an inert gas, sealed in the gas chamber 7 and the gas container or disconnector 6. And, both devices 1 and 6 are
They are installed on separate frames 12 and 13, respectively.

[Problems to be solved by the invention] When assembling and installing such an electrical device, the gas chamber 7 is The gas chamber 7, the gas inlet, the disconnector 6, and the main body are shown in the A-A plane shown in the drawing where the gas inlet and the disconnector 6 are welded together, and in the B-B plane in the illustration in which the main body outer box 1 and the gas chamber 7 are welded together. It was extremely difficult to simultaneously match the joint surfaces of the outer box 1 and the gas chamber 7. For this,
First, on the A-A plane above, the gas filler and disconnector 6
The joint surfaces of the main body outer box 1 and the gas chamber 7 are aligned and welded, and then the joint surfaces of the main body outer box 1 and the gas chamber 7 are matched with each other and the joint surfaces of the main body outer box 1 and the gas chamber 7 are aligned and welded. It was necessary to weld while absorbing errors due to surface accuracy. For this purpose, the above B-
Welding work on the B side required highly skilled skills and had the disadvantage of poor workability.

This invention was made in view of the above-mentioned drawbacks, and it is possible to easily and reliably weld the joint surfaces when connecting two electrical devices containing different media, and to improve workability. The purpose is to provide a structure that can be improved.

[Means and actions for solving problems]

The electrical device according to this invention includes a first bellows having one end attached to a side surface of the first electrical device, and communicating with the first electrical device through the first bellows to electrically connect both devices. The connecting button is the first
a movable chamber protruding from and movably arranged in a direction perpendicular to the direction of expansion and contraction of the bellows; a second bellows attached to the movable chamber so as to surround the bushing; The bellows is provided with a connection chamber whose other end perpendicular to the bellows is attached to a second electrical device.
The expansion and contraction of both bellows and the movement of the movable chamber combine to simultaneously absorb the machining error in the horizontal direction between the two electrical devices and the machining error in the direction perpendicular thereto.

〔Example〕

FIG. 2 is a front sectional view schematically showing the configuration of an electric device according to an embodiment of the invention.

In the figure, 9 is a first bellows attached to the side wall of the main body outer box 1 so as to communicate therewith and is expandable and retractable in the direction C shown in the figure, and 10 is a first bellows attached to the upper plate of the primary side bushing 5 of the first electric device. , a movable oil chamber as a movable chamber attached to the side wall so as to communicate with the main body outer box 1 via the first bellows 9. The movable oil chamber 10 is movably mounted on the extension surface of the frame 12 to support its own weight, and can move in the direction C in the figure by the expansion and contraction of the first bellows 9. The outer box 1 is configured so that its interior is filled with oil. A second bushing 11 is attached to the upper plate of the movable oil chamber 10 to surround the primary bushing 5 protruding from the surface of the oil chamber 10, and is extendable and retractable in the direction D in the figure, which is perpendicular to the direction of expansion and contraction of the first bellows 9, that is, the direction C. bellows. 7a is the second bellows 1
This is a gas chamber as a connection chamber installed between the gas inlet 1 and the gas inlet or disconnector 6.

As shown, the second bellows 11 of the gas chamber 7a
One end that interlocks with the gas cylinder and the other end that communicates with the disconnector 6 are substantially perpendicular to each other.

When assembling and installing the electrical device of this embodiment, the first bellows 9 and the second bellows 11 may be Errors due to horizontal machining accuracy and vertical floor surface accuracy that occur between the joint surfaces of the gas chamber 7a and the gas inlet and disconnector 6 due to expansion and contraction are simultaneously absorbed and the respective joint surfaces are easily adjusted. can be made to match. For this reason, the welding of the joint surfaces becomes simple and reliable, and the workability can be improved.
Furthermore, by expanding and contracting the first and second bellows, it is possible not only to absorb the expansion and contraction caused by thermal expansion in each part of the above-mentioned electrical device, but also to reduce vibrations caused by gas filling and opening/closing of the disconnector 6. In addition, it is possible to prevent the excitation vibration of the transformer 3 from being transmitted to the gas cylinder and disconnector 6.

In the above embodiment, a direct connection type electrical device between a gas-filled electrical device or a disconnector and an oil-filled transformer was described, but this invention is also applicable to a direct connection type electrical device that connects other gas-filled electrical equipment and oil-filled electrical equipment. It can also be applied to an electrical device in which two electrical devices each containing different media are directly connected to each other.

[Effect of idea]

As described above, according to this invention, one end is the first
A first bellows attached to the side of an electrical device, and a bushing that communicates with the first electrical device through the first bellows and electrically connects both devices, are arranged in the direction of expansion and contraction of the first bellows. a movable chamber that is attached and movably arranged to protrude in a perpendicular direction; a second bellows that is attached to the movable chamber so as to surround the bushing; and one end that is perpendicular to the second bellows; Since the other end is provided with a connection chamber that is attached to the second electrical device, the expansion and contraction of both bellows and the movement of the movable chamber combine to cause machining errors in the horizontal direction and in the direction perpendicular to this between the two electrical devices. This has the effect of simultaneously absorbing it and making it easier to match the joint surfaces between both devices, improving the workability of welding and the like.

[Brief explanation of the drawing]

FIG. 1 is a front cross-sectional view schematically showing the structure of a conventional electric device, and FIG. 2 is a front cross-sectional view schematically showing the structure of an embodiment of the electric device of this invention. In the figure, 1 is the outer box of the oil-immersed transformer (first electrical equipment), 2 is oil (first medium), 3 is the transformer, 5 is the bushing, and 6 is the gas filler and disconnector (the first electrical equipment). 2 electrical equipment), 7a is a gas chamber (connection chamber), 8 is an inert gas (second medium), 9 is a first bellows,
10 is a movable oil chamber (movable chamber), 11 is a second bellows, and 12 and 13 are frames. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] An electrical device that directly connects a first electrical device containing a first medium and a second electrical device containing a second medium and installed on a different frame from the first electrical device. , a first bellows having one end attached to a side surface of the first electric device with the direction of expansion and contraction being substantially horizontal; A bushing, to which the other end of the first bellows is attached and communicates with the first electrical device, and whose both ends are electrically connected to each of the electrical devices, protrudes in a direction substantially perpendicular to the direction of expansion and contraction of the first bellows. a second bellows having one end attached to an outer wall of the movable chamber from which the bushing protrudes and surrounding the protruding bushing;
An electrical device comprising: a connection chamber having one end attached to the other end of the second bellows and the other end substantially perpendicular to the one end being attached so as to communicate with the second electrical device. .