公开(公告)号：US20030178067A1

公开(公告)日：2003-09-25

申请号：US10104259

申请日：2002-03-25

申请人： Permco, Inc.

发明人： Brant M. Fredrickson ,  Joel B. Aukerman ,  Alan E. Smallsreed ,  Richard T. Conner ,  Richard A. Olszewski

IPC分类号： F16K017/00

CPC分类号： F16K17/065 ,  Y10T137/7905 ,  Y10T137/7928 ,  Y10T137/7929

摘要： A multiple pressure direct acting relief valve is disclosed. The multiple pressure relief valve comprises an actuating cylinder, a relief valve and an adjustment screw interconnecting the actuating cylinder and the relief valve. The relief valve includes a low pressure spring which biases a poppet valve arrangement permitting the poppet valve arrangement to be actuatable at a first pre-determined pressure. The actuating cylinder includes a piston that is biased by a high pressure spring causing an additional compressive force to be applied to the poppet valve arrangement through an actuating rod received through the adjustment screw. When pressure is applied to the piston within the actuating cylinder, an additional compressive force is applied by the high pressure spring and the actuator rod to the poppet valve arrangement causing the poppet valve arrangement to be actuatable at a second pre-determined pressure. Lock nuts are provided on the adjustment screw that interconnects the actuating cylinder and the relief valve. When the lock nuts are disengaged, the position of the adjustment screw can be moved relative to the actuating cylinder and the relief valve permitting the adjustment of both pre-determined actuating pressures for the poppet valve arrangement.

摘要翻译： 公开了一种多重直流作用安全阀。 多重减压阀包括致动气缸，安全阀和将致动气缸和安全阀互连的调节螺钉。 安全阀包括低压弹簧，该低压弹簧偏压提升阀装置，允许提升阀装置以第一预定压力致动。 致动缸包括通过高压弹簧偏置的活塞，通过经由调节螺钉接收的致动杆，附加的压缩力被施加到提升阀装置。 当压力施加到致动缸内的活塞时，通过高压弹簧和致动器杆将附加的压力施加到提升阀装置，使提升阀装置能够以第二预定压力致动。 调节螺钉上设有锁紧螺母，将调节缸与安全阀互相连接。 当锁定螺母脱开时，调节螺钉的位置可以相对于致动缸移动，并且安全阀允许调节提升阀装置的预定致动压力。