Manual selector for hydraulic control valve

摘要

A selector with at least two settings, useful for controlling flow of fluid in a hydraulic control valve. In at least one of the settings of the selector, control of fluid flow is fully automatic, being controlled by the valve actuator, and in at least one of the settings of the selector, control of fluid flow is fully manual, being entirely independent of the valve actuator.

主权项

1. A selector (500) useful for controlling flow of fluid in a hydraulic control valve (1000), said flow of fluid controllable by an actuator (200) comprising a plunger (210), said actuator (200) having at least two states, a first state with said plunger (210) in a blocking position preventing flow of fluid past the tip of said plunger (210), and a second state with said plunger (210) in an unblocking position permitting flow of fluid past the tip of said plunger (210), said selector (500) comprising:
a. a bore (540) characterized by a nozzle gate (542), said bore (540) blockable at said nozzle gate (542) by said plunger (210); and b. a manual control means (550) adapted to reversibly transition said selector (500) between at least two positions, a first at least one position (1030), and a second at least one position (1040, 1050) in which fluid flow bypasses said plunger (210) tip, enabling manual control of said fluid flow, wherein said hydraulic control valve (1000) is adapted to provide, in said at least one first position, fully-automatic control (1030) by enabling fluid flow past said tip of said plunger (210) so that said states of said actuator (200) control fluid flow and, in said at least one second position, fully-manual control of water flow by either (a) blocking fluid flow through said selector (1050), thereby preventing fluid flow through said valve or (b) providing a fluid connection through said selector (1040) wherein fluid flow is via a fluid connection (520, 525) bypassing said nozzle gate (542) of said bore (540), thereby enabling fluid flow through said hydraulic control valve (1000) independent of the position of said plunger (210), and wherein said bore (540) is characterized by a main longitudinal axis and said manual control means (550) is adapted to rotate said selector (500) about said bore (540) main longitudinal axis.