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    Plastic underdrainage tube
    2.
    发明授权
    Plastic underdrainage tube 失效
    塑料排液管

    公开(公告)号：US4523874A

    公开(公告)日：1985-06-18

    申请号：US422088

    申请日：1982-09-23

    申请人： Shinji Miki ,  Toyokazu Nishio ,  Shinzo Matsuyama ,  Shinichi Yamazaki

    发明人： Shinji Miki ,  Toyokazu Nishio ,  Shinzo Matsuyama ,  Shinichi Yamazaki

    IPC分类号： E02B11/00

    CPC分类号： E02B11/005

    摘要： A plastic underdrainage tube of generally reticular configuration formed by integrally extruding a plastic material is disclosed. The tube is basically composed of axially spaced apart annular bands having relatively greater thicknesses to reinforce or impart to the tube a high stability against surrounding pressures, and circumferentially disposed longitudinal strands in thicknesses less than those of said annular bands. These longitudinal strands are closely spaced apart along the circumference of the tube to form drainage openings between the circumferentially adjacent strands, the openings being disposed across the entire periphery and lengthwise of the tube to allow the water inflow over the entire wall portion thereof. Each of said strands is blended into or integrally joined at its intersections to the annular bands so as to be mechanically supported by said annular bands of reinforcing members, thus improving the overall strength of the tube to withstand the surrounding pressure while maintaining the amount of plastic material to be used at a low level. In another version, longitudinal strands are formed in sinuously corrugated configuration and blend at their valley portions into the annular bands to define the drainage openings between the ridge portions of the adjacent strands. The external forces acting on the ridge portions can be spreaded or decentralized by the corrugation of the strands and supported by the adjacent annular bands of reinforcing member.

    摘要翻译： 公开了通过整体挤出塑料材料形成的大体网状结构的塑料下排液管。 管基本上由具有相对较大厚度的轴向间隔开的环形带组成，以加强或赋予管对围绕压力的高稳定性，以及厚度小于所述环形带的周向布置的纵向股线。 这些纵向股线沿着管的圆周紧密间隔开，以在周向相邻股线之间形成排水开口，该开口跨越管的整个周边和纵向设置，以允许水流入其整个壁部分。 每个所述股线在其交叉点处共混成一体地连接到环形带，以便由所述加强构件的环形带机械地支撑，从而提高管的总体强度以承受周围的压力，同时保持塑料的量 材料在低水平使用。 在另一种形式中，纵向绞线形成为具有波纹形状并且在它们的谷部处混合到环形带中以限定相邻绞线的脊部之间的排水开口。 作用在脊部上的外力可以通过股线的波纹扩张或分散，并由相邻的加强构件的环形带支撑。