| 摘要 |
PURPOSE:To obtain the display valve of the overcurrent passage display part which can sink under its own weight through a colored fluid under a stable state, by making the specific gravity of fan shaped valve pieces constituting the display valves larger than the colored fluid, making the specific gravity of a coupling member smaller than the colored fluid, thereby making the lower part of the display valve heavy. CONSTITUTION:In the valve body 31, the coupling member 34 is smaller than the fan shaped valve pieces 33. Therefore intervals Q formed between the fan shaped valve pieces 33 are exposed. Said parts constitute a plurality of cut in parts 45 formed at the outer surface of the valve body 21. The cut in parts 45 serve the role of flow paths for the colored fluid 29 located at the lower surface of the valve body 31, when it sinks by its own weight. The valve body 31 is guided by the colored fluid 29 flowing upward through the flow path, and the valve body 31 can sink under the stable state. The specific gravity of the fan shaped valve piece 33 is made larger than that of the coupling member 34. Therefore, the fan shaped valve piece 33 never moves upward with its central part as a center when the valve body 31 is lifted or lowered. Since the center of gravity is positioned at the lower part of the valve body 31, the up and down movement of the valve body is made very stable. |
