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KR-20260064743-A - Electrical device having a gasket system

KR20260064743AKR 20260064743 AKR20260064743 AKR 20260064743AKR-20260064743-A

Abstract

An electric device (100) comprises a gasket system (10) comprising a gasket (1) configured to be impermeable to an insulating fluid used for operating the electric device. The gasket system further comprises a hydrous material (2) configured to absorb an insulating fluid used for operating the electric device. The gasket and the hydrous material are arranged in sequence within an area of the electric device to be sealed, so that when an insulating fluid used for operating the electric device passes through the gasket, the insulating fluid comes into contact with the hydrous material.

Inventors

  • 우사레크 크시슈토프
  • 스브라바티 알란

Assignees

  • 히타치 에너지 리미티드

Dates

Publication Date
20260507
Application Date
20241030
Priority Date
20231128

Claims (16)

  1. As an electric device (100) including a gasket system (10), The above gasket system (10) is, - A gasket (1) configured to be impermeable to an insulating fluid used for operating the above-mentioned electric device (100), and - Includes a functional material (imbibing material; 2) configured to absorb the insulating fluid used for the operation of the above electric device (100), and - The gasket (1) and the fluid material (2) are arranged sequentially within the area of the electric device (100) to be sealed, such that when the insulating fluid used for the operation of the electric device (100) passes through the gasket (1), the insulating fluid comes into contact with the fluid material (2).
  2. In paragraph 1, - The above functional material (2) is configured to absorb the insulating fluid in the event of leakage through the gasket (1), thereby preventing leakage of the insulating fluid out of the electrical device (100), the electrical device (100).
  3. In paragraph 1 or 2, - The above functional material (2) is an electric device (100) configured to function hydrocarbons.
  4. In any one of paragraphs 1 through 3, - The above functional material (2) is an electric device (100) included in a functional structure (20) that can be handled separately from the gasket (1).
  5. In paragraph 4, - The above function structure (20) is a fabric containing the above function material (2), - The above function structure (20) is an electric device (100) that is a ribbon.
  6. In paragraph 4 or 5, - An electric device (100) in which the thickness of the above function structure (20) is smaller than the thickness of the above gasket (1).
  7. In any one of paragraphs 1 through 6, - An electrical device (100) further comprising a sensor (12) configured to detect the insulating fluid.
  8. In any one of paragraphs 1 through 7, - The above functional material (2) is provided in the form of beads and/or fibers, an electric device (100).
  9. In paragraph 8, - The beads are configured to expand their size by a factor of at least 10 when absorbing the insulating fluid, and/or - An electric device (100) configured such that the fibers expand and solidify in size when the fibers are hydrated with the insulating fluid.
  10. In any one of paragraphs 1 through 9, - The above gasket (1) comprises or is composed of at least one of cork and rubber, and is an electric device (100).
  11. In any one of paragraphs 1 through 10, - The above functional material (2) is configured to expand or swell when absorbing the insulating fluid, an electric device (100).
  12. In any one of paragraphs 1 through 11, The above electric device (100) is, - 1st element (3), - A second element (4) disposed on the first element (3), wherein the second element (4) is spaced apart from the first element (3) and a gap (34) is formed between the first element (3) and the second element (4), and - The above gasket system (10) is configured to be arranged within the gap (34) and to prevent the passage of an insulating fluid used for operating the electric device (100) through the gap (34), an electric device (100).
  13. In Paragraph 12, - An opening (30) is formed in the first element (3), and - The first element (3) is configured to receive the insulating fluid during the operation of the electric device (100), and - The above gasket (1) is arranged closer to the opening (30) than the above functional material (2), in an electrical device (100).
  14. In Paragraph 13, - The above gasket (1) surrounds the opening (30), and - The above functional material (2) is an electrical device (100) surrounding the opening (30) and the gasket (1).
  15. In any one of paragraphs 12 through 14, - In the first direction, the gap (34) is partitioned by the first element (3) and the second element (4), and in the second direction, the gap is partitioned by the third element (5) and the fourth element (6), and the second direction is perpendicular to the first direction, - In the first direction, the gasket (1) and the functional material (2) are arranged between the first element (3) and the second element (4), and in the second direction, the gasket (1) and the functional material (2) are arranged between the third element (5) and the fourth element (6), an electric device (100).
  16. In paragraph 15, - The above electric device (100) is a power transformer, - The first element (3) above is a tank frame or flange or cover, and - The second element (4) above is a cover, blind flange or electrical component, for example, a valve, bushing or sensor, and - The above third element (3) and the above fourth element (4) are sides that partition welded bars or machined grooves, an electrical device (100).

Description

Electrical device having a gasket system The present disclosure relates to a gasket system for an electric device and an electric device. Gaskets are used in electrical devices to prevent leakage of fluids used during the operation of the electrical devices. US 2007/159774 A1 discloses a sealed electro-technical device comprising a functional unit and a container for receiving a liquid-type fluid. The device is sealed by a first sealing joint and a second sealing joint, wherein a barrier element is positioned between the sealing joints. The barrier element is permeable to the fluid and impermeable to the sealing material constituting the second sealing joint, thereby allowing the impermeability of the first sealing joint to be checked before the second sealing joint is formed. US 2001/040037 A1 discloses a wireless communication device having a string-type waterproof packing provided at an opening in the equipment body. In addition, a string-type absorbent composed of a material having greater elastic contractility than that of the waterproof packing is positioned further inward from the waterproof packing in the equipment body, so that intruding water is absorbed even in the event of failure of the waterproof packing. FIGS. 1 and FIGS. 2 show exemplary embodiments of a gasket system in two different drawings. FIGS. 3 to 5 show exemplary embodiments of an electrical device in different situations. FIG. 6 shows a second exemplary embodiment of an electric device. FIG. 7 shows a third exemplary embodiment of an electric device. FIG. 8 shows a fourth exemplary embodiment of an electric device. An exemplary embodiment of a gasket system is illustrated in a perspective view in FIG. 1. A cross-sectional view of this exemplary embodiment is illustrated in FIG. 2. The gasket system (10) comprises a gasket (1) and a functional structure (20) comprising a functional material (2). The gasket (1) is formed as a ring and is composed, for example, of cork or rubber. The functional structure (20) is a ribbon arranged in a ring shape around the gasket (1). The functional structure (20) comprises, for example, a fabric in which the functional material (2) is contained or composed of the functional material (2). The functional material (2) may be beads or fibers of a polymer. The functional material (2) is configured to absorb an insulating fluid, particularly a hydrocarbon such as oil. As can be seen in FIG. 2, the cross-sections of the gasket (1) and the function structure (20) are both elliptical or circular. The thickness/diameter of the function structure (20) is thus smaller than the thickness/diameter of the gasket (1). In contrast to what is shown in FIGS. 1 and 2, the functional material (2) may also be provided in the form of a coarse powder of multiple unconnected beads or fibers. This coarse powder may be sprinkled around the gasket (1), for example, in the form of a ring. FIG. 3 shows a first exemplary embodiment of an electric device (100). The electric device (100) is a power transformer. FIG. 3 shows only a section of this power transformer (100). The power transformer (100) includes a first element (3) in the form of a tank frame. The tank frame (3) is filled with insulating fluid. An opening (30) is formed in the tank frame (3) to form a guide-through for a bushing (8). The bushing (8) has a second element (4) realized as a flange of the bushing (8). The bushing (8) completely covers the opening (30) together with its flange (4). The flange (4) thereby extends beyond the opening (30), and a gap (34) is formed between the tank frame (3) and the flange (4). The gap (34) is partitioned by the tank frame (3) and the flange (4) in the vertical or first direction, and by the third element (5) and the fourth element (6) in the lateral or second direction. The two elements (5 and 6) are welded bars. The bushing (8) having the flange (4) is secured to the tank frame (3) by bolts (7) extending through the welded bars (6). To prevent the insulating fluid within the tank frame (3) from leaking out of the electrical device (100) through the gap (34), a gasket system is arranged within the gap (34). The gasket system may be the gasket system (10) of FIGS. 1 and FIGS. 2. Thereby, the ring-shaped gasket (1) and the ring-shaped functional structure (20) can completely surround the opening (30). The gasket (1) is positioned closer to the opening (30) than the functional structure (20). As can be seen in FIG. 3, the thickness of the gasket (1) is selected so that it extends over the entire height of the gap (34), that is, one side contacts the tank frame (3) and the other side contacts the flange (4). This provides a first obstacle to the insulating fluid when the insulating fluid attempts to leave the electrical device (100) through the gap (34). The thickness or diameter of the function structure (20) is smaller than the height of the gap (34), so the function structure (20) only contacts the tank frame (3). FIG. 4 illustra