Patent ID: 7296586
Filing Date: 2007-11-20
Classification: B65D,G05D,Y10T

Abstract:
1. A gas-regulating unit regulating an internal gas pressure in a gas-tight liquid-storage tank, mounted on the gas-tight tank in which stored liquid is sealed from outside atmosphere by covering a top surface of the stored liquid with an isolating-gas, including: a main gas-exhausting unit having an exhaust valve for opening and exhausting gases from the gas-tight tank when an internal gas pressure in the gas-tight tank increases to more than a specified level; and an isolating-gas regulator supplying the isolating-gas when an isolating-gas pressure decreases to less than a specified level; wherein only one opening resides on a roof of the gas-tight liquid-storage tank to minimize the possibility of leakage and the gas regulating unit is mounted thereon the one opening; wherein the only opening is located away from a center of the roof to reduce a length of an upstream pipe needed to reach the isolating gas regulator; and wherein the main gas-exhausting unit and the isolating-gas regulator are integrally and directly coupled with each other and they only communicate with the gas-tight tank through the only opening residing on the roof of the gas-tight liquid-storage tank.