| 摘要 |
A freeze-proof water valve ( 10 ) for supplying secondary water under pressure in freezing ambient conditions to a snow making apparatus ( 11 ) having primary water spray nozzles ( 12 ) and secondary water spray nozzles ( 13,14 ). The valve housing ( 15 ) is provided with an interior primary water chamber ( 16 ) with a water inlet ( 17 ) and a primary water outlet ( 18 ) for continuous passage of primary water under pressure therethrough for delivery to primary water spray nozzles ( 12 ) on the snow making apparatus ( 11 ). A valve body ( 22,24 ) is mounted within this valve housing ( 15 ) within the primary water chamber ( 16 ) for flow of water therearound from the housing inlet ( 17 ) to the primary outlet ( 18 ) to prevent freeze-up of the valve body ( 22,24 ) when in the off position. The valve body ( 22,24 ) is movable between an on position and an off position whereby water from the primary chamber ( 16 ) is directed to a secondary outlet ( 20,25 ) when the valve ( 22,24 ) is in the on position for feeding water to the secondary water spray nozzle or nozzles ( 13,14 ). Water in the primary chamber ( 16 ) is shut off from this secondary outlet ( 20,25 ) and water in this secondary outlet ( 20,25 ) is directed instead to a water drain outlet ( 21 ) for discharge when the valve ( 22,24 ) is in the off position.
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