Fluid control valve

Abstract

To provide a fluid control valve which has a simple structure, is compact, and is highly responsive when used while being connected to a fluid pressure circuit. A fluid control valve has a first flowpassage (27) and a second flow passage (28), which connect a first port (13a) and a second port (13b) in parallel. The first flow passage (27) is provided with an opening / closing valve mechanism (34)for temporarily opening the first flow passage (27) when pressurized fluid is supplied to the first port (13a). The second flow passage (28) is provided with a throttle valve mechanism (41) for opening the second flow passage (28) in a limiting manner. The opening / closing valve mechanism (34) has: an opening / closing valve section (46) comprising an opening / closing valve seat (46a) and an opening / closing valve body (46b); a valve opening force generation means (47) for generating valve opening force in the opening / closing valve body (46b); and a valve closure delay mechanism (35) for closing the opening / closing valve body (46b) after a delay time has passed. The throttle valve mechanism (41) has a throttle valve section (67) comprising a throttle hole (40) and a needle (68), and the area ofopening of the opening / closing valve section (46) is greater than that of the throttle valve section (67).

Description

technical field [0001] The present invention relates to a fluid control valve that controls the flow rate, pressure, and the like of pressurized fluid supplied to or discharged from an actuator such as a fluid pressure cylinder. Background technique [0002] For a fluid control valve that controls the flow rate, pressure, etc. of the pressure fluid supplied or discharged to the actuator when driving an actuator such as a fluid pressure cylinder, for example, as disclosed in Patent Document 1, Patent Document 2, etc. As such, fluid control valves having various structures are known. [0003] This type of fluid control valve usually restricts the flow rate or pressure of the pressure fluid by combining a needle valve that restricts the flow rate or pressure of the pressure fluid, a flow adjustment valve that uses the interaction of fluid pressure and spring force to open and close the flow path, or only the pressure fluid A check valve or the like that flows in one direction,...

AI Technical Summary

Problems solved by technology

[0004] However, the conventional fluid control valves are mostly complex and large fluid control valves because the needle valve, flow adjustment valve, check valve, etc. Due to the problem of poor usability, we expect the emergence of fluid control valves that are more compact and more usable.

Images