| 摘要 |
<p>1, 084, 643. Regulating fluid-flow. TECHNICON INSTRUMENTS CORPORATION. Jan. 27, 1966 [Feb. 18, 1965], No.3644/66. Heading G3H. [Also in Division F2] In order to maintain a constant flow of liquid from a container 10 into an outlet 14, which is connected to the interior of the container by a flexible coiled pipe 12 of stainless steel or plastics material, the downstream end of the pipe 12 is adjustably connected to the stem of a valve 19 controlling the supply of atmospheric air to a pipe 30 leading to the space above the liquid in the container. Any change in flow-rate causes movement of the pipe 12 due to a tendency to straighten the latter so resulting in adjustment of the valve and hence variation in the rate at which air enters the container to replace liquid discharged therefrom. The liquid in the container may be subjected to a pressure head in which case the valve controls the pressure gas supplied thereto. The movement of the coiled pipe is proportional to the square of the velocity of flow therethrough.</p> |
