| 摘要 |
<p>PURPOSE: A water sampling apparatus is provided to improve measurement accuracy by preventing underground water existing in each layer of a tube well from being mixed with each other. CONSTITUTION: A water sampling apparatus comprises a casing(100), a strainer(200), water outlets(300), and first and second packers(400,500). The casing is vertically inserted into a tube well formed in the ground and has a hollow. The strainer is vertically inserted into the hollow of the casing and has multiple inlet holes(210). The water outlets pump underground water existing inside the tube well to the ground. The first packer is coupled to the strainer and closes the tube well. The second packer is located inside a through hole of the first packer and is inflated by water pressure to close the through hole of the first packer.</p> |
