| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve problems that through an ocean deep water intake pipe with a large diameter more than 1,000 m, long and thermal insulation must be installed in order to materialize business with usage of ocean energy and marine culture in ocean deep water, a polyethylene pipe with a diameter larger than 1 m is not marketed and huge investment is required for its production, a difficult problem exists to transport the pipe with a diameter larger than 1 m and a length more than 1,000 m, a large exclusive ship is occupied for a long time, many boats and expensed are required at an installing site problems depending to weather, tide, or geography exist, and pipes made of other material are expensive and have no thermal insulation. SOLUTION: An arrow plate A made of high density polyethylene resin, which has a cross section in the shape that an arrow is bent in the circular arc shape and is a long band plate, is extrusion molded, is wound around a reel with a 2-10 m diameter, is transported to the installing site, is transformed to a pipe with a thermally welding machine and simultaneously so formed to two layers by welding a net containing polyethylene plate to its armor, is transformed to a barrel structure pipe by winding iron rings around it, and is installed.</p> |
