| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lifting device that can lift deep groundwater with a small bore. <P>SOLUTION: A groundwater lifting device is provided with a triple pipe consisting of an outer pipe 1, an inner pipe 2, and a water lifting pipe 3. The outer pipe 1 has an external strainer pipe 13 in an intermediate part thereof. The inner pipe 2 has an internal strainer pipe 14 which is located below the external strainer pipe 13, in the lower end part thereof. A space between the lower end of the water lifting pipe 3 and the inner pipe 2 is closed to form an annular passage 15 for supplying a pressurized fluid between these two pipes. The pressurized fluid is supplied between the internal strainer pipe 14 and the annular passage 15 from the annular passage 15 to generate a jet fluid. An ejector mechanism 16 is provided which introduces and lifts groundwater, which flows into the outer pipe 1 from the external strainer pipe 13, to the water lifting pipe 3 through the internal strainer pipe 14 by the jet fluid. <P>COPYRIGHT: (C)2013,JPO&INPIT |
