| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas pressure detecting device capable of preventing inflow of outside air and promptly detecting pressure fluctuation in a transport condition so as to facilitate adjustment of secondary air, and a powdery and granular material transporting device capable of performing stable transport by using this gas pressure detecting device. SOLUTION: This gas pressure detecting device is provided with a closed body 62 comprising a closed body main part 62A movably inserted into a cylindrical body 61 in which a gas flow is generated and an annular flange part 62B provided in the upper part of the closed body main part 62A and closing an outside air port 61A of the cylindrical body 61 in the transport condition; a fixed shaft 64 facing inside of the cylindrical body 61 and capable of moving the closed body 62 in accordance with pressure fluctuation by the gas flow; and an elastic body 65 energizing the fixed shaft 64 or the closed body 62 to open the outside air port 61A of the cylindrical body 61 in a normal condition. The annular flange part 62B of the closed body 62 resists the energizing force of the elastic body 65 to close the outside air port 61A of the cylindrical body 61 in the transport condition, and opens the outside air port 61A of the cylindrical body 61 by the energizing force of the elastic body 65 in a non-transport condition. COPYRIGHT: (C)2007,JPO&INPIT
|
