| 摘要 |
Filling valve ( 12 ) including:-a hollow housing ( 21 ); a moving valve assembly ( 24 ) slidingly mounted in the housing ( 21 ), the moving valve assembly ( 24 ) and the hollow housing ( 21 ) together defining a liquid chamber ( 30 ) and a gas chamber ( 32 ); a liquid inlet ( 46 ) for putting the liquid chamber ( 30 ) into communication with a liquid supply pipe ( 14 ); a gas inlet ( 47 ) for putting the gas chamber ( 32 ) into communication with a gas supply pipe ( 17 ); wherein the moving valve assembly ( 24 ) includes: a hollow valve rod ( 25 ) provided with a through hole ( 43 ) opening in the gas chamber ( 32 ) at an upper end ( 37 ) of the valve rod ( 25 ), the valve rod being slideable with respect of the housing ( 21 ) between an open position in which the valve rod ( 25 ) opens an aperture ( 23 ) in the housing ( 21 ), thereby allowing liquid to flow from the liquid chamber ( 30 ) through the aperture ( 23 ), and a closed position in which the valve rod ( 25 ) closes the aperture ( 23 ), and a piston ( 26 ) slidingly mounted in the housing between an open position in which a lower end ( 51 ) of the piston ( 26 ) is spaced from the upper end ( 37 ) of the valve rod ( 25 ), thereby allowing gas to pass from the gas chamber ( 32 ) to the through hole ( 43 ) in the valve rod ( 25 ) through the opening formed at the upper end ( 37 ) thereof, and a closed position in which the lower end ( 51 ) of the piston ( 26 ) is in sealing contact with the upper end ( 37 ) of the valve rod ( 25 ).
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