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    • 2. 发明申请
    • Overfill prevention valve for shallow tanks
    • 浅水箱防溢油阀
    • US20070209713A1
    • 2007-09-13
    • US11369253
    • 2006-03-07
    • Donald DavidRonald Borst
    • Donald DavidRonald Borst
    • F16K31/18
    • F16K31/18F16K33/00Y10T137/7368Y10T137/7371Y10T137/7436
    • An overfill prevention valve for mounting on the filling inlet of a liquid storage tank has an elongated, tubular valve body provided with an inlet at one end and one or more outlets in the sidewall thereof. A pressure-actuated piston is moveable between an open position spaced below an annular valve seat between the inlet and outlets and a closed position engaging the valve seat to close the outlet. An orifice in the top of the piston communicates with an actuating chamber on the opposite side of the piston so that a measure of piloting liquid flows into the chamber and out a pilot hole at the bottom of the valve body during normal filling operations. A buoyant float is slidable along a hollow guide tube attached to the bottom of valve body and communicates with the pilot port for closing a discharge hole in the guide tube when the float rises to an upwardly buoyed position due to the liquid in the tank reaching a predetermined maximum level. Such closure of the discharge hole causes the pressure within the chamber to rise, shifting the piston to its upper, closed position against the valve seat, thereby closing the outlets and terminating further flow into the tank.
    • 用于安装在液体储存罐的填充入口上的溢出物防止阀具有细长的管状阀体,其在一端设置有入口,在其侧壁中具有一个或多个出口。 压力致动活塞可以在入口和出口之间的环形阀座之间间隔开的打开位置和与阀座接合以关闭出口的关闭位置之间移动。 活塞顶部的孔口与活塞相对侧上的致动室相通,以便在正常填充操作期间,一个引导液体的量程流入腔室并在阀体底部排出导向孔。 漂浮的浮子可沿安装在阀体底部的中空导管滑动,并与导向口连通,用于当浮子上升到向上浮起的位置时封闭导管中的排放孔,这是由于罐内的液体达到 预定最大水平。 排放孔的这种闭合导致室内的压力升高,将活塞移动到其相对于阀座的上部闭合位置,从而关闭出口并终止进入罐的进一步流动。