VALVE DEVICE, STORAGE SYSTEM FOR LIQUEFIED GAS FUEL, VEHICLE, AND STORAGE METHOD FOR LIQUEFIED GAS FUEL

摘要

A first vapor phase valve including a housing, a flow passage in the housing, a main valve to block or open the flow passage, and an excess flow valve to block the flow passage when vapor phase dimethyl ether flows through the flow passage. The first vapor phase valve includes: a pressure chamber communicating with a pressure opening portion of the housing and a fixed shaft connected to the excess flow valve to maintain the excess flow valve in an open state by using pressure of liquid phase dimethyl ether flowing into the pressure chamber from the pressure opening portion. The excess flow valve, in order to prevent fluid from flowing out at a specified flow rate or more, can be forcedly opened.

主权项

1. A valve device including: a flow passage through which fluid in vapor phase flows; a main valve which blocks or opens the flow passage; and an excess flow valve which block the flow passage when the fluid in vapor phase flows from one side to opposite side of the flow passage at a predetermined flow rate or more, wherein the valve device comprises:
a pressure chamber into which the fluid in liquid phase flows; and an isolation member which maintains the excess flow valve in an open state by using pressure of the fluid in liquid phase flowing into the pressure chamber.