| 摘要 |
PURPOSE:To compute the maximum sinking position, the maximum sinking amount, and the slant and deformed state of the floating roof based on the measured value from each liquid level gage, by arranging appropriate number of the liquid level gages on the central part of the floating roof and the circumferential direction thereof, and directly measuring the liquid level position with respect to the floating roof and the slant and the deflected deformed state of the floating roof. CONSTITUTION:A pluraity of wells 5 are provided along the circumferential direction of the floating roof 3 at an appropriate angle interval and at the central part of the floating roof 3. The liquid level gage 10 is provided in each well 5. The liquid level gage 10 includes a gage head 11, a wire 12, a float 13, and a transmitting device 14. The gage head 11 has a winding up mechanism of the wire 12. The position of the float 13, which follows the liquid level in the well 5, is measured by the extending amount of the wire 12, i.e., the rotating amount of the winding piece for the wire 12. The transmitting device 14 converts the liquid level position measured by the gage head 11 into an electric or pneumatic signal, and sends it to a remote monitoring room. |
