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Double valve with anti-tiedown feature

机译:双阀带防拉倒功能

摘要

A double valve (10) is reset when a source of pressurized fluid is connected to a reset port. First and second reset pistons (38,64) are actuated in response to the pressurized fluid to reset first and second movable valve units (18,20) of the double valve (10), respectively. First and second pilot chambers (74,75;81,82) are vented when the first and second reset pistons are actuated, the first and second pilot chambers corresponding to first and second pilot valves (76,83) for actuating the first and second movable valve units, respectively. The venting prevents the first and second movable valve units from moving out of a deactuated position, respectively. The source of pressurized fluid is removed from the reset port. The first reset piston is retracted so that the second pilot chamber receives pressurized fluid while the first pilot chamber continues to be vented. The second reset piston is retracted after a predetermined delay time following retraction of the first reset piston, the predetermined delay time being sufficient to allow the second pilot chamber to become substantially pressurized. If the second pilot valve is actuated when the second reset piston is retracted, then the pressurized fluid in the second pilot chamber drives the second movable valve unit out of a deactuated position during a time that pressurized fluid in the first pilot chamber is insufficient to drive the first movable valve unit out of a deactuated position.
机译:当加压流体源连接到复位端口时,双阀(10)复位。响应于加压流体致动第一和第二复位活塞(38,64),以分别复位双阀(10)的第一和第二可动阀单元(18,20)。当第一和第二复位活塞被致动时,第一和第二先导室(74,75; 81,82)被排气,第一和第二先导室对应于用于致动第一和第二先导阀的第一和第二先导阀(76,83)。可动阀单元。排气分别防止第一和第二可移动阀单元移出致动位置。压力流体的来源已从复位端口中移除。第一复位活塞缩回,以便第二先导腔室接收加压流体,同时第一先导腔室继续排气。在第一复位活塞缩回之后的预定延迟时间之后,第二复位活塞缩回,该预定延迟时间足以允许第二先导腔室变得基本加压。如果在第二复位活塞缩回时致动了第二先导阀,则在第一先导腔中的加压流体不足以驱动第二时间内,第二先导腔中的加压流体将第二可移动阀单元从脱开位置驱动出去。第一可移动阀单元脱离致动位置。

著录项

  • 公开/公告号EP1515053B1

    专利类型

  • 公开/公告日2006-12-20

    原文格式PDF

  • 申请/专利权人 ROSS OPERATING VALVE CO;

    申请/专利号EP20040255063

  • 发明设计人 RUSSELL NEIL E.;FOSTER JOSEPH E.;

    申请日2004-08-23

  • 分类号F15B20/00;

  • 国家 EP

  • 入库时间 2022-08-21 20:51:07

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