| 摘要 |
PURPOSE:To certainly shut-off lumpy substance and permit certain air-seal concurrently when a sealing valve is closed by installing the outside sealing body having a space for accommodating the lumpy substance leaked in the discharge opening part of the captioned sealing valve. CONSTITUTION:In the discharge opening part 3, the annular flange part 5 equipped with the annular valve seat 6 formed integrally with the opening part 3 and the valve body 7 for air-sealing the valve seat 6 in case when the opening part 3 is closed are installed. As the valve body 7 is turned through a cylinder 11 in order to close the opening part 3, the inside valve seat 13 closes the opening part 3 at first, and falling of lump substance 4 is shut-off. As an elastic body 12 holds a margin for contraction, the valve body 7 rotates further, and presses strongly the valve seat 6 to achieve air-seal. The lumpy substance 4' leaked is accommodated into the space S1 of the valve body 7. |
