| 主权项 |
1. A cryogenic storage tank system comprising:
a cryogenic storage tank which stores liquefied gas therein, the cryogenic storage tank being erected in a vertical direction; a first discharge pipe having has one end connected to a lower portion of the cryogenic storage tank, wherein liquefied gas in a liquid phase is discharged through the first discharge pipe; a second gaseous phase pipe having one end connected to an upper portion of the cryogenic storage tank, the second gaseous phase pipe serving as a flow passage through which liquefied gas in a gaseous phase flows; a third discharge pipe having one end connected to the other end of the second gaseous phase pipe, wherein the liquefied gas in gaseous phase is discharged through the third discharge pipe; a fourth pressure-increasing pipe having one end disposed at the other end of the second gaseous phase pipe, the fourth pressure-increasing pipe serving as a flow passage through which pressure-increasing liquefied gas flows; an auxiliary vaporizer disposed at a middle portion of the fourth pressure-increasing pipe; and an automatic flow path selector valve comprising:
a valve body comprising a first inlet connected to the other end of the first discharge pipe, a second inlet connected to the other end of the third discharge pipe, a first outlet connected to an external main vaporizer, and a second outlet connected to the other end of the fourth pressure-increasing pipe; anda flow path selector member that is converted into one mode depending on pressure applied to the first inlet and pressure applied to the second inlet, the one mode being selected from the group consisting of a pressure-increasing mode in which the first inlet and the first outlet communicate with each other, the first inlet and the second outlet communicate with each other, and the second inlet and the first outlet are prevented from communicating with each other, a liquid phase discharge mode in which the first inlet and the first outlet communicate with each other, the first inlet and the second outlet are prevented from communicating with each other, and the second inlet and the first outlet are prevented from communicating with each other, and a pressure-decreasing mode in which the second inlet and the first outlet communicate with each other and the first inlet is prevented from communicating with the first outlet and is prevented from communicating with the second outlet. |
