A valve assembly for a gas vessel, the valve assembly comprising:
- a valve body mounted at an inlet of the gas vessel and connected to a gas supply source;
- a connection part connected to the gas supply source on a side surface of the valve body;
- a check valve mounted on the connection part;
- a safety valve mounted on the side surface of the valve body to discharge a fuel gas in the gas vessel to an outside when a gas pressure inside the gas vessel increases above a certain pressure or higher;
- a housing mounted on the valve body mounted on the gas vessel and having a gas passage through which the fuel gas passes and an outlet for discharging the fuel gas to an inside of the gas vessel;
- a flux valve mounted to be sealably and linearly movable inside the housing to open and close the outlet and having a through portion formed at a center thereof, the fuel gas passing through the through portion;
- a seat member sealably mounted on a lower side of the housing and having a passage part through which the fuel gas passes;
- a ball member mounted inside the seat member to open and close the passage part;
- a push unit mounted on a lower side of the seat member to push the ball member to maintain an opened state of the passage part, and to release a pushing force of the ball member when the fuel gas is filled to a set value in the gas vessel to allow the ball member to seal the passage part;
- and
- a gauge unit mounted on the valve body to display a charging amount of the fuel gas filled in the gas vessel,
- wherein the push unit comprises:
- a support member connected to the seat member;
- a push rod inserted into the support member to be able to move linearly, maintaining a constant gap with an inner surface of the support member to allow the fuel gas to pass therethrough, and pushing the ball member through the passage part;
- a float floating by buoyancy when the fuel gas is filled in the gas vessel;
- and
- a power transmission unit including:
- a slot formed longitudinally in the support member;
- a rod part inserted into the slot and fixed to the float, the rod part moving along the slot;
- and a connection member connected between the float and the push rod to transmit a movement of the float to the push rod thereby transferring the movement of the float to the push rod to linearly move the push rod, and
- wherein the gauge unit comprises:
- an elevating rod arranged to be able to move up and down on the push unit and moving together according to an elevation of the float;
- a gauge mounted on the valve body and displaying a charging amount of the fuel gas charged in the gas vessel by rotating a gauge needle according to a movement of the elevating rod;
- and a permanent magnet mounted on an upper end of the elevating rod to rotate the gauge needle by a magnetic force.