Importance

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Abstract

Disclosed is a flow control valve for construction equipment capable of effectively operating travelling and working apparatuses when the construction equipment performs complex work by operating the working apparatus while travelling. The invention provides a flow control valve for construction equipment, comprising: a valve body having a parallel passage and an actuator port formed therein, wherein the parallel passage is in fluid communication with an oil channel through which hydraulic oil is supplied from a hydraulic pump, and the actuator port is connected to a hydraulic actuator; a spool embedded in the valve body, wherein the spool supplies the hydraulic oil, supplied from the hydraulic pump, to the hydraulic actuator through an actuator port at one side and returns the hydraulic oil, discharged from the hydraulic actuator, to a tank passage through another actuator port at an opposite side, by communicating the parallel passage with the actuator port when switched; a first valve placed at a passage between the oil channel and the parallel passage and including a first orifice communicated with the oil channel and a second orifice for supplying the hydraulic oil, passing through the first orifice, to the parallel passage; a second valve placed inside the first valve to open/close the first orifice; a resilient member for supporting the first orifice in a closed state by pressurizing the second valve; a cover for confining strokes of the first and second valves by supporting the first valve and one end of the resilient member.

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First Claim