| 摘要 |
PROBLEM TO BE SOLVED: To provide a water motor gong which is connected with a fire extinguishing equipment piping and issues an alarm, by striking a gong by transforming water flow through a casing into a torque, and which can keep a certain volume, is hardly damaged by continuous duty, and is made smaller and lighter in weight. SOLUTION: In the inflow part of the casing, a variable member of which the diameter of a nozzle changes depending on amount of water is set, and slope is set toward the outflow part of the casing. A shot peening is applied in the inside surface of the gong. COPYRIGHT: (C)2005,JPO&NCIPI
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