| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic circuit that can operate specific hydraulic acceptors (for example, hydraulic hammer) flowing much consumption flow late and the other hydraulic acceptors at the same time. SOLUTION: A hydraulic circuit has a multiple hydraulic delivering-device 1, a specific hydraulic valve 2, and a hydraulic control circuit 13. The distributing-device 1 is equipped with multiple valves 22-24 of a DDIC type having a detecting function for a maximum working pressure, a non-saturation function, and a flow dividing function with no relation to a load. The specific hydraulic valve 21 of the DDIC type, connected in series to the other valves 22-24, is set to work specific acceptors 121-122 consuming a supplied flow rate mostly. The hydraulic control circuit 13 has a pressure regulator 14 that is set between a hydraulic power supply S and the control port inlet a1 of the specific valve 21 to reduce the pressure of a hydraulic fluid supplied from the power supply to a given control value. Thus, this hydraulic circuit can adjust the pressure regulator 14, and preset the working speed of the specific acceptors.
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