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    • 5. 发明专利
    • Pressure air driving type piston reciprocation-type hydraulic pump
    • 压力式空气动力式活塞式液压泵
    • JP2014043817A
    • 2014-03-13
    • JP2012187139
    • 2012-08-28
    • Pascal Engineering Corpパスカルエンジニアリング株式会社
    • MIZUTA MOTOKI
    • F04B9/12F04B53/12
    • F04B9/127F04B53/10F04B53/121F04B53/14F04B53/16
    • PROBLEM TO BE SOLVED: To prevent a main switch valve from being set in a neutral position (all port open state) when a piston is operated at a very low speed, in a piston reciprocation type hydraulic pump driven by pressure air.SOLUTION: First and second annular valve faces 51, 52 brought close to or into contact with first and second annular valve seats 53, 54 at valve cases 31 and 32 sides, are formed on upper and lower both ends of an annular valve element body 43a of a main valve element 43, an air introduction chamber 55 is formed by a piston accommodation hole 45 and a piston portion 46, and an auxiliary switch valve 42B switches a main switch valve 42A between an air supply position and an air discharge position by supplying and discharging the pressure air to the air introduction chamber 55. A center-side core part of the main valve element 43 is constituted as an independent auxiliary valve element 43A, its upper end faces an air discharge port 5, and the auxiliary valve element 43A is rapidly moved by weak pressure air force, to release shielding of a second valve member 57 and to reliably switch the main valve element 43 to be operated.
    • 要解决的问题:为了防止当活塞以非常低的速度运行时,在由压力空气驱动的活塞往复式液压泵中,主开关阀被置于中立位置(全部开口状态)。解决方案:首先 并且在阀壳31和32侧与第一和第二环形阀座53,54接近或接触的第二环形阀面51,52形成在主体的环形阀元件主体43a的上下两端 阀元件43通过活塞收纳孔45和活塞部46形成空气导入室55,辅助开关阀42B通过供给排出阀42B而在供气位置与排气位置之间切换主开关阀42A 将主阀元件43的中心侧芯部构成为独立的辅助阀体43A,其上端面向空气排出口5,辅助阀门元件 nt 43A通过弱压空气而快速移动,以释放第二阀构件57的屏蔽并可靠地切换要操作的主阀元件43。