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    • 4. 发明授权
    • Large-depth underground drainage facility and method of running same
    • 大型地下排水设施及其运行方式
    • US6102618A
    • 2000-08-15
    • US272094
    • 1999-03-18
    • Kunio TakadaKenji OtaniMasayuki YamadaSaburo MaruSumio SudoSadashi Tanaka
    • Kunio TakadaKenji OtaniMasayuki YamadaSaburo MaruSumio SudoSadashi Tanaka
    • E02B11/00E03F1/00E03F5/22F04D15/00F04D29/44F04D29/60E02B13/00
    • E02B11/00E03F1/00E03F5/22F04D15/0072F04D29/448F04D29/605F05B2260/96F05C2225/08
    • An underground water channel is provided in an underground of a large depth, and rain water and the like flow into this underground channel from flood control channels, conduits and rivers through vertical shafts. A pump well of a pump station is connected to a downstream end of the underground channel, and water flowing into the pump well is discharged by a pump to a discharge tank. The pump is disposed generally at a medium water level of the underground channel, and a lowest water level L.W.L enabling draining is the medium water level of the underground channel. In an open channel flow operation of an open channel-closed channel mixed flow operation, water level of the underground channel is maintained at the lowest water level L.W.L, so that the underground channel is in an open channel condition. In the closed channel flow operation, the underground channel is fully filled with water, and further water level rises into the vertical shafts, so that the underground channel is in a closed channel condition. By changing an outflow factor in accordance with rainfall patterns, the rate of flow into the vertical shafts can be accurately estimated, so that the large-depth underground drainage facility can be run in a stable manner.
    • 深水地下设有地下水道,雨水等通过垂直井从防洪通道,管道和河流流入该地下通道。 泵站的泵井连接到地下通道的下游端,流入泵井的水通过泵排出到排放罐。 泵通常设置在地下通道的中等水位,并且能够排水的最低水位L.W.L是地下通道的中等水位。 在开放通道封闭通道混合流动操作的开放通道流动操作中,地下通道的水位保持在最低水位L.W.L,使得地下通道处于开放通道状态。 在封闭通道流动操作中,地下通道充满水,水位进一步升高至竖井内,使地下通道处于封闭通道状态。 通过根据降雨模式改变流出因子,可以准确估计垂直井的流量,从而可以稳定运行大型地下排水设施。
    • 9. 发明申请
    • Inlet casing and suction passage structure
    • 入口套管和抽吸通道结构
    • US20050254941A1
    • 2005-11-17
    • US11123096
    • 2005-05-06
    • Yasuhiro InoueTakashi AkiSeiji KawabataSadashi Tanaka
    • Yasuhiro InoueTakashi AkiSeiji KawabataSadashi Tanaka
    • F04D29/44F04D29/66F01D5/10
    • F04D29/444F04D29/4213F04D29/4273F04D29/448F05D2250/51
    • A prewhirl type inlet casing for inducing a spiral stream in fluid comprising a suction passage arranged on an upstream side, being orthogonal to a rotary shaft of fluid machinery, and an internal passage connected to the suction passage, the internal passage being formed in a spiral shape so as to induce a swirl stream orthogonal to the rotary shaft in the fluid. A guide vane is provided in the fluid passage in the inlet casing. The guide vane has a rectifying function capable of distributing flow rates in the swirl stream of the fluid in the internal passage between the swirl center side and the swirl outer peripheral side and has a rectifying function capable of causing the fluid to deflect into the swirling direction of the swirl stream induced by the internal passage. With these rectifying functions, a rectified swirl stream can be easily created in the in internal passage so as to prevent occurrence of a deviation of a cavitations inducing zone. With this configuration, it is possible to effectively prevent occurrence of the deviation of the cavitations inducing zone in order to aim at simplifying the configuration of the internal passage.
    • 一种用于在流体中诱导螺旋流的预旋流型入口壳体,包括布置在上游侧的与流体机械的旋转轴正交的吸入通道和连接到吸入通道的内部通道,内部通道形成为螺旋形 以便在流体中引起与旋转轴正交的旋流。 引导叶片设置在入口壳体中的流体通道中。 导向叶片具有能够在涡旋中心侧和涡流外周侧之间的内部通路中的流体的涡流中分配流量的整流功能,并且具有能够使流体偏向旋转方向的整流功能 的内部通道引起的涡流。 利用这些整流功能,可以在内部通路中容易地产生整流的涡流,以防止产生空穴诱导区的偏离。 利用该结构,为了简化内部通路的结构,能够有效地防止空化诱导区的偏离的发生。