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    • 48. 发明公开
    • Pneumatic circuit to provide different opening and closing speeds for a pneumatic operator
    • 气球系统zur Erzeugung verschiedener Geschwindigkeiten zumÖffnenund Schliessen。
    • EP0663531A2
    • 1995-07-19
    • EP95300111.2
    • 1995-01-09
    • APPLIED MATERIALS, INC.
    • Ebbing, Peter F.
    • F15B11/024F15B11/04
    • F15B11/042F15B11/0413F15B21/10Y10T137/0396Y10T137/2544Y10T137/87217
    • A pneumatic circuit prolongs a pneumatic valve (20) opening time using an accumulator with two quick exhaust type valves (36, 46) in series while providing a rapid valve closing time. This structure and method is self-contained and amenable to retrofit in existing installations without any external connections. Slow opening is achieved by routing inlet gas pressure simultaneously to an accumulator (51) and the operating cylinder (21) of the valve to be opened. A tortuous piping path (61, 36, 62, 63, 44, 46) and increased volume to be pressurized due to the addition of the accumulator (51) substantially reduces the isolation valve opening time, thereby eliminating problems associated with quick opening of a pneumatic valve.
      When the pneumatic valve (20) needs to be closed quickly, slight venting toward the inlet valve (29) immediately causes the quick exhaust valves (36, 46) to vent (39, 49) their downstream pressure. The accumulator (51) then vents through its quick exhaust valve (46) while separately the main quick exhaust valve (36) quickly vents the air cylinder (21) of the pneumatic valve. Closing times penalties of less than 50 milliseconds can be achieved using this configuration and opening times can be increased by adjusting the volume of the accumulator.
    • 使用具有串联的两个快速排气型阀(36,46)的蓄能器来延长气动阀(20)打开时间,同时提供快速的关阀时间。 这种结构和方法是独立的,并且适合在现有的安装中进行改造而没有任何外部连接。 通过将入口气体压力同时传送到要打开的阀的蓄能器(51)和操作缸(21)来实现缓慢打开。 曲折的管道(61,36,62,63,44,46)和由于加入蓄能器(51)而被加压的体积大大减少了隔离阀打开时间,从而消除了与快速打开 气动阀。 当气动阀(20)需要快速关闭时,对入口阀(29)的轻微排气立即使快速排气阀(36,46)排出(39,49)它们的下游压力。 蓄能器(51)然后通过其快速排气阀(46)排出,而主快速排气阀(36)快速地排出气动阀的气缸(21)。 使用该配置可以实现小于50毫秒的关闭时间,并且可以通过调节蓄能器的体积来增加打开时间。