| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust valve having large vacuum break capacity, and quickly performing a vacuum break. SOLUTION: In the exhaust valve, a casing including a body 1 and a cover 2 forms a valve chest 3 which includes an inflow port 4 opened in a lower part and an outflow port 5 opened in an upper part. A valve seat 6 is formed between the valve chest 3 and the outflow port 5. The body 1 includes a plurality of ribs 9 integrated with an inner wall of the valve chest 3 and protruded inside, and a bottomed and approximately cylindrical float support 10 having a through-hole 11 and a second through-hole 8 for communicating an inside with an outside thereof is arranged inside the ribs 9. A spherical float 12 is arranged in the float support 10 in a free condition. The float support 10 is energized to the outflow port 5 side to be arranged by a coil spring 13 as an elastic member, and an opening and closing member 16 is provided for closing the second through-hole 8 when the float support 10 is displaced to the outflow port 5 side. The float support 10 is displaced to the inflow port 4 side against the coil spring 13, and the second through-hole 8 is opened with energy of outside air suddenly flowing through the outflow port 5 into the valve chest 3. COPYRIGHT: (C)2011,JPO&INPIT
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