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    • 81. 发明授权
    • Water-hammerless check valve
    • US6102072A
    • 2000-08-15
    • US155725
    • 1998-10-05
    • Hiroshi YokotaShingo Yokota
    • Hiroshi YokotaShingo Yokota
    • F16K15/03F16K15/18F16K17/04F16K47/02
    • F16K47/023F16K15/03F16K15/186F16K17/048Y10T137/7842Y10T137/7853Y10T137/7903Y10T137/87265
    • The present invention is intended to provide an economically advantageous, high-performance water hammer preventing check valve capable of preventing both water hammer and pressure rise under any pipeline conditions when feed of a fluid is stopped and of easily designed and manufactured. The invention provides a water hammer preventing check valve which opens when a fluid is fed forward and closes when the feed of the fluid is stopped to prevent the fluid from reversing. The check valve has a main valve unit and a bypass valve unit disposed in parallel, wherein the main valve unit has a single main valve element capable of opening and closing an opening defined by an inclined main valve seat disposed between an inlet passage and an outlet passage, constantly biased in a valve closing direction, formed in a shape subject to a low form drag and providing a small inertial resistance, and capable of being substantially completely seated on the main valve seat at the moment the velocity of the inertial flow of the fluid in a discharge direction decreases to naught after the supply of the fluid has been stopped; and the bypass valve unit has a bypass valve element capable of linearly moving in opposite directions to open and close an opening defined by a bypass valve seat disposed between the inlet passage and the outlet passage, and linked to a damping device for damping the linear movement of the bypass valve element so that the bypass valve element may gradually close the opening defined by the bypass valve seat after the start of the reverse flow of the fluid.The bypass valve unit may be provided with an opening adjusting mechanism for adjusting the opening of the bypass valve element. The main valve unit may be provided with a valve closing force adjusting mechanism for applying a valve closing force to the main valve element.
    • 82. 发明授权
    • Composite-action butterfly valve
    • 复合动作蝶阀
    • US5957428A
    • 1999-09-28
    • US68143
    • 1998-08-12
    • Hiroshi Yokota
    • Hiroshi Yokota
    • F16K1/24F16K1/22
    • F16K1/24
    • In the valve, a valve element (4) is supported on a valve element operating shaft (7) by a fixed-length support means (5) and a variable-length support means (6) connected to its back surface opposite the front surface facing a valve seat (3). The fixed-length support means (5) has an arm (5a) of a fixed length pivotally connected to the valve element (4) and mounted for turning on the valve element operating shaft (7), and the variable-length support means (6) of a variable length comprises an elastic member (6a) acting to reduce the distance between the opposite ends of the variable-length support means (6), a transmission mechanism for converting the torque of the valve element operating shaft (7) into a force to increase the distance between the opposite ends of the variable-length support means (6), and a stopper (6f) for limiting the range of variation of the distance between the opposite ends of the variable-length support means (6). An external torque is applied to the valve element operating shaft (7) to operate the valve element (4).
    • PCT No.PCT / JP96 / 02420 Sec。 371日期1998年8月12日 102(e)1998年8月12日PCT PCT 1996年8月28日PCT公布。 公开号WO97 / 18409 日期1997年5月22日在阀中,阀元件(4)通过固定长度的支撑装置(5)和连接到其后表面的可变长度的支撑装置(6)支撑在阀元件操作轴(7)上 相对于面向阀座(3)的前表面。 固定长度支撑装置(5)具有固定长度的臂(5a),该臂(5a)枢转地连接到阀元件(4)并安装成用于转动阀元件操作轴(7),并且可变长度支撑装置 6)可变长度包括用于减小可变长度支撑装置(6)的相对端之间的距离的弹性构件(6a),用于将阀元件操作轴(7)的扭矩转换成 用于增加可变长度支撑装置(6)的相对端之间的距离的力和用于限制可变长度支撑装置(6)的相对端之间的距离的变化范围的止动器(6f) 。 外部扭矩施加到阀元件操作轴(7)以操作阀元件(4)。
    • 85. 发明授权
    • Composite-action butterfly valve
    • 复合动作蝶阀
    • US5713556A
    • 1998-02-03
    • US687579
    • 1996-10-21
    • Hiroshi Yokota
    • Hiroshi Yokota
    • F16K1/24F16K1/16
    • F16K1/24
    • The present invention provides a high-performance, economical valve. In the valve, a valve element (4) is supported by a valve element support shaft (6) on an arm member (5) with a degree of freedom of turning, and the arm member (5) is supported by a valve element operating shaft (7) supported on a valve casing (1) at a position thereon spaced a distance apart from a position thereon at which the valve element support shaft (6) supports the valve element (4) on the arm member (5). One end par (4a) of the valve element (4) is biased constantly toward one end part (5a) of the arm member (5). When the valve is opened in a fully open state by applying external torque to the valve element operating shaft (7), the valve element (4) extends along the streamline of fluid flow to reduce head loss due to resistance exerted by the valve element (4) on fluid flow. The valve element (4) is brought into uniform, close contact with a sealing surface (3m) of a valve seat (3) to stop fluid flow.
    • PCT No.PCT / JP95 / 00127 Sec。 371日期1996年10月21日 102(e)日期1996年10月21日PCT 1995年1月31日PCT PCT。 公开号WO95 / 22022 日期:1995年8月17日本发明提供了一种高性能,经济的阀。 在阀中,阀元件(4)由臂部件(5)上的阀元件支撑轴(6)支撑,具有转动自由度,并且臂部件(5)由阀元件操作 轴(7),其在与其上的阀元件支撑轴(6)支撑在所述臂构件(5)上的所述阀元件(4)的位置隔开一定距离处的位置处支撑在阀壳体(1)上。 阀元件(4)的一端(4a)朝向臂构件(5)的一个端部(5a)恒定地偏置。 当通过向阀元件操作轴(7)施加外部扭矩使阀门处于完全打开状态时,阀元件(4)沿着流体流动线延伸,以减少由阀元件施加的阻力造成的头部损失( 4)流体流动。 阀元件(4)与阀座(3)的密封表面(3m)均匀地紧密接触以阻止流体流动。