DAMPED CHECK VALVE HAVING MULTI-PRESSURE OPERATION

• Main Author: MCCORMACK JIMROY ARNER
• Format: Patent
• Language: Chinese; English
• Published: 01.12.2020
• Subjects: ACTUATING-FLOATS; AIR INTAKES FOR JET-PROPULSION PLANTS; BLASTING; COCKS; COMBUSTION ENGINES; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; GAS-TURBINE PLANTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

A damped check valve (20) having multi-pressure operation is provided. The check valve includes a liner (22) with a poppet (24) movable within the liner. The liner defines a flow passage (38) alignedalong a longitudinal axis (44) defined by the liner. A biasing element (26) is operably coupled between the poppet and the liner to bias a first flow face (84) of the poppet against an annular seat (50). The first flow face is configured such that a first fluid pressure is required to move the poppet from the closed position to an open position wherein the poppet is unseated from the annular seatand a second fluid pressure is required to hold the poppet in the open position, the second pressure being less than the first pressure. There is a sufficient diametrical clearance between the poppetand the liner which allows for flow control at pressures which are less than the initial opening pressure. 提供了一种具有多压力操作的阻尼止回阀(20)。该止回阀包括衬套(22)，以及能在该衬套内移动的提升阀(24)。衬套限定了沿着由衬套限定的纵向轴线(44)对齐的流动通道(38)。偏置元件(26)能操作地联接在提升阀与衬套之间，以使提升阀的第一