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    • 2. 发明专利
    • Relief valve for heavy equipment
    • 用于重型设备的减压阀
    • JP2008241037A
    • 2008-10-09
    • JP2008062327
    • 2008-03-12
    • Volvo Construction Equipment Abボルボ コンストラクション イクイップメント アーベー
    • JEON MAN SUKKANG MIN HEIK
    • F16K17/02F16K17/04F16K17/06
    • F16K17/065F16K17/10G05D16/18Y10T137/7747
    • PROBLEM TO BE SOLVED: To provide a relief valve for heavy equipment for construction preventing a leakage of oil and the detachment of an O-ring due to the detachment of a guide in resetting the set pressure of the relief valve.
      SOLUTION: The relief valve for the heavy equipment includes components such as a sleeve 2, a poppet 6 and a pilot poppet 12. In addition to these components, the relief valve includes: a plug 1 screwed into the sleeve and formed with a tank inlet communicating with a tank passage; the guide 20 screwed into the plug, mounted with the O-ring on the outer surface to airtightly close a clearance of a contact surface connected to the plug, and formed with a locking jaw 20a on the outer surface; a main piston 7 for variably regulating the set pressure of a pressure chamber by pressurizing the pilot poppet when supplying pilot signal pressure from the outside; a control plug 22 connected into the guide and receiving an inflow of the pilot signal pressure; and a stopper 25 preventing the detachment of the guide from the plug by supporting the locking jaw when loosening the guide from the plug to set the set pressure of the valve.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:提供一种用于重建设备的安全阀,防止油的泄漏和由于引导件的拆卸导致的溢流阀的设定压力的复位导致的O形环的脱离。

      解决方案:重型设备的安全阀包括套筒2,提升阀6和先导提升阀12等部件。除了这些部件之外,安全阀包括:螺塞在套筒中并形成有 与罐通道连通的罐入口; 引导件20拧入插头中,将O形环安装在外表面上,以密封闭合连接到插头的接触表面的间隙,并在外表面上形成有锁定爪20a; 主活塞7,用于当从外部提供先导信号压力时,通过对先导提升阀加压来可变地调节压力室的设定压力; 控制插头22,其连接到引导件中并接收导频信号压力的流入; 以及止动件25,其通过在从所述塞子松开所述引导件以支撑所述阀的设定压力时支撑所述卡止爪来防止所述引导件从所述塞子脱离。 版权所有(C)2009,JPO&INPIT