Drilling hydraulic system and drilling machine
The utility model belongs to the technical field of drilling machine hydraulic control, and particularly relates to a drilling hydraulic system and a drilling machine. The drilling hydraulic system comprises an overflow valve, a sequence valve, a second one-way valve and a switch valve. A port P7 of...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The utility model belongs to the technical field of drilling machine hydraulic control, and particularly relates to a drilling hydraulic system and a drilling machine. The drilling hydraulic system comprises an overflow valve, a sequence valve, a second one-way valve and a switch valve. A port P7 of the overflow valve is connected with a port B8 of the reversing valve and a small cavity of the feeding oil cylinder, and a port T7 of the overflow valve is connected with a hydraulic oil tank or a port A8 of the reversing valve; a port P6 of the sequence valve is connected with a large cavity of the feeding oil cylinder, and a port T6 of the sequence valve is connected with a port A8 of the reversing valve; a port A5 of the switch valve is connected with a control end L6 of the sequence valve, and a port B5 of the switch valve is connected with the hydraulic oil tank; an oil outlet of the second one-way valve is connected with a port P6 of the sequence valve and a large cavity of the feeding oil cylinder, and an |
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