Conservator

Patent metadata

Field	Value
Publication number	US-2016138959-A1
Application number	US-201314903080-A
Country	US
Kind code	A1
Filing date	Jul 9, 2013
Priority date	Jul 9, 2013
Publication date	May 19, 2016
Grant date	—

Abstract

The conservator is provided with a housing that houses an insulation oil, a rubber bag that inflates or deflates inside the housing so as to contact an oil surface of the insulation oil, and an oil level gauge that detects the oil level of the insulation oil housed inside the housing. The oil level gauge includes a float member, an arm connected to one end of the float member, and a dial display unit that displays an oil level in response to an angle of the arm. The float member is swingably connected to the arm, extending away from the arm along the lower surface of the rubber bag. The length of the float member in the extending direction thereof is larger than the maximum thickness of the float member.

First claim

1 . A conservator comprising:
a housing that houses an insulation oil; a rubber bag that inflates or deflates inside said housing so as to contact an oil surface of said insulation oil; and an oil level gauge that detects an oil level of said insulation oil housed in said housing, said oil level gauge including a float unit, an arm connected to one end of said float unit, and a dial display unit that displays said oil level in response to an angle of said arm, said float unit being swingably connected to said arm, extending away from said arm along a lower surface of said rubber bag, the length of said float unit in the extending direction thereof being larger than the maximum thickness of said float unit, and said arm being configured to shape in accordance with the inflated shape of said rubber bag as said float unit is being sandwiched between a bottom surface of said housing and said lower surface of said rubber bag.

2 . The conservator according to claim 1 , wherein
said float unit includes a plate-shaped float member, and a first shaft member provided at one end of said plate-shaped float member and configured to join said plate-shaped float member and said arm in such a manner that said plate-shaped float member and said arm are swingable to each other.

3 . The conservator according to claim 2 , wherein
said float unit further includes a first roller-shaped float member rotatably inserted around said first shaft member, said first roller-shaped float member contacts said rubber bag by rolling against said lower surface thereof.

4 . The conservator according to claim 3 , wherein
said float unit further includes a second shaft member disposed at the other end of said plate-shaped float member and configured to be in parallel to said first shaft member, and a second roller-shaped float member rotatably inserted around said second shaft member, said second roller-shaped float member contacts said rubber bag by rolling against said lower surface thereof.

5 . The conservator according to claim 4 , wherein
said float unit further includes a plurality of third shaft members disposed with a spacing from one another between said first shaft member and said second shaft member and configured to be in parallel to said first shaft member, and a plurality of third roller-shaped float members rotatably inserted around said third shaft members, respectively, the plurality of said third roller-shaped float members contact said rubber bag by rolling against said lower surface thereof along the extending direction of said float unit.

Assignees

• Mitsubishi Electric Corp

Inventors

• Mino Kenichi
• Nishiura Ryuichi
• Idemaru Toshiki

Classifications

• G01F23/34 Primary

  using mechanically actuated indicating means {(G01F23/38 takes precedence)} · CPC title

• H01F2027/404

  Protective devices specially adapted for fluid filled transformers · CPC title

• H01F27/14

  Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling · CPC title

• G01F23/76

  characterised by the construction of the float · CPC title