The invention provides a hydraulic control system of a crane and the crane therewith, wherein the hydraulic control system includes an oil inlet pipe, an oil return pipe, a weight-balancing oil cylinder, an operating room oil cylinder, a sub arm pulling pin oil cylinder and a sub arm installing oil cylinder. The hydraulic control system also includes a combining control valve group comprising: (1) a weight-balancing control valve group, which is connected between the oil inlet pipe and the oil return pipe and includes a first reversing valve being connected to the weight-balancing oil cylinder and controlling the stretch-out and contraction of the weight-balancing oil cylinder; (2) an operating room control valve group, which is connected between the oil inlet pipe and the oil return pipe and includes a second reversing valve being connected to the operating room oil cylinder and controlling the stretch-out and contraction of the operating room oil cylinder; (3) a sub arm pulling pin control valve group, which is connected between the oil inlet pipe and the oil return pipe and includes a third reversing valve being connected to the sub arm pulling pin oil cylinder and controlling the stretch-out and contraction of the sub arm pulling pin oil cylinder; and (4) a sub arm installing control valve group, which is connected between the oil inlet pipe and the oil return pipe and includes a fourth reversing valve connected to the sub arm installing oil cylinder and controlling the stretch-out and contraction of the sub arm installing oil cylinder.
Hydraulic control system of crane and the crane therewith
2015-08-12
Patent
Electronic Resource
English