| 摘要 |
PROBLEM TO BE SOLVED: To radically solve problems owing to the existence of a conduit section by removing the conduit section itself. SOLUTION: This flow rate measuring instrument is provided with a restriction mechanism 3 in the middle of a pipe 1 to measure the flow rate of a fluid based on pressures measured by pressure sensors 2 provided on the upstream side and on the downstream side, respectively. The measuring instrument is provided with a thin-walled portion 11a with its exterior side recessed at a required part of the outer wall 11 of the pipe 1. Projected/depressed parts 6 are formed on the upstream and down stream sides of the restriction mechanism 3, with the projected/depressed parts 6 projected/depressed owing to elastic deformation of the thin-walled portion 11a caused by pressure fluctuation of the fluid, while pressure-sensitive surfaces of the pressure sensors 2 are put into contact with outer surfaces of the projected/depressed parts 6. COPYRIGHT: (C)2011,JPO&INPIT
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