The invention discloses a single cylinder pin type hydraulic control system and engineering machinery. The single cylinder pin type hydraulic control system comprises a first one-way valve, a balance valve, a first reversing valve and a first energy accumulator for providing pin pulling pressure for a pin, wherein the oil inlet of the first one-way valve is connected with a rod cavity of a telescopic cylinder, the oil outlet of the first one-way valve is connected with the first energy accumulator, the first reversing valve is arranged on an oil path between the rod cavity and a rodless cavity of the telescopic cylinder and a pressure oil source, the balance valve is arranged on an oil path between the rod cavity and the rodless cavity of the telescopic cylinder and the first reversing valve, and the hydraulic control system also comprises a pressure release valve and a first damper valve, the control end of the balance valve is connected with an oil tank by the pressure release valve, and the first damper valve is connected with the rod cavity of the telescopic cylinder. The single cylinder pin type hydraulic control system and the engineering machinery can provide stable and reliable pin pulling pressure.
Hydraulic control system for single cylinder pin type telescopic boom and engineering machinery
2015-05-06
Patent
Electronic Resource
English
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