Pressure/flow control valve

• Main Authors: YANG QINGHAI, HOSONO MASAYUKI
• Format: Patent
• Language: Chinese; English
• Published: 04.08.2004
• Edition: 7
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; CONTROLLING; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; PHYSICS; REGULATING; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

本发明公开一种压力/流量控制阀，它包括：主阀体，其上有主油口和次级油口；流量调节部件，具有第一单向阀，该单向阀用来切断流向所述主油口的压力流体的流动，该调节部件用来将从所述次级油口导出的所述压力流体调节成预定流量；以及，压力调节部件，设有第二单向阀，该单向阀用来切断流向所述次级油口的压力流体的流动，该调节部件用来将从所述主油口导出的所述压力流体的压力降低到预定压力，从而使压力流体从所述次级油口导出，所述压力/流量控制阀设有连通通道，该通道用来将所述压力调节部件与所述流量调节部件彼此连通起来。该控制阀能够借助于简单而又方便的机构来调节二次压力、减少元件的数量，并缩小尺寸减轻重量。 A pressure adjustment device (23) is provided with a valve plug (82) for reducing the pressure of a pressure fluid based on the clearance between it and a seat part (94). A rod (86) has a seal (89) to be displaced together with the valve plug, and a spring element (76) which is attached to one end of the rod, to press the plug onto an annular projection (92) on the inside wall surface of a first valve body (12). When the secondary pressure supplied from a secondary connection (30) is balanced by the biasing force of the spring element, the valve assumes a closed state, and the plug rests on the seat part. An independent claim is included for a pressure or flow-rate control valve.