发明名称 |
Underground water pumping device |
摘要 |
A groundwater pumping apparatus includes an outer tube, an inner tube, a shield member, a vacuum unit and a pump unit. The outer tube is buried in ground, and has a water-passing portion at its lower part. The inner tube has a substantially same length as the outer tube, and is placed in the outer tube such that the inner tube is spaced from the outer tube. The inner tube has a groundwater inlet at its bottom end, which is provided at a position lower than a top end of the water-passing portion. The shield member shields top ends of the outer tube and the inner tube. The vacuum unit reduces a pressure in the inner tube. The pump unit pumps groundwater that comes in the inner tube through the groundwater inlet. |
申请公布号 |
AU7670901(A) |
申请公布日期 |
2002.02.18 |
申请号 |
AU20010076709 |
申请日期 |
2001.07.31 |
申请人 |
NISHIMATSU CONSTRUCTION CO. LTD.;SEIKO KOGYO CO., LTD.;NIPPON KENSETSU KIKAI SHOJI CO.,LTD.;ASAHI TECHNO CORP. |
发明人 |
TORU YAMAGUCHI;SHUICHI MATSUMURA;YOSHIYUKI MINAMIJIMA;SHIGEYOSHI TAKAHASHI |
分类号 |
E02D3/10;E02D19/10;E21B43/12 |
主分类号 |
E02D3/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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