electric control multimode steering valve, hydraulic steering control system and wheel type crane

摘要

Summary "Electric Control Multimode Steering Valve, Hydraulic Steering Control System and Wheeled Crane" The present invention relates to an electric control multimode steering valve. The steering valve comprises: a flow distribution and collection valve (y), a first electromagnetic shift valve (y1), and a second electromagnetic shift valve (y2). a valve body comprises four groups of paired valve oil holes. the first oil holes of the first electromagnetic shift valve (y1) and the second electromagnetic shift valve (y2) respectively communicate with a first group of valve body orifices (pr, pl) of the valve body. the second oil holes of the first electromagnetic shift valve (y1) and the second electromagnetic shift valve (y2) respectively communicate with a second group of valve oil holes (a1, b1) of the valve body. a third oil hole in the first electromagnetic shift valve (y1) communicates with the flow collection port of the distribution and flow collection valve (y). a first flow distribution port of the flow collection and distribution valve (y) and a third oil port of the second electromagnetic shift valve (y2) respectively communicate with a third group of valve oil ports (a2, b2) of the valve body. a second flow distribution port of the flow collection and distribution valve (y) and the third oil port of the second electromagnetic shift valve (y2) respectively communicate with a fourth group of valve oil ports (a3, b3) of the valve body. Also described are a hydraulic control steering system and a wheeled type crane. The steering valve can implement multi-mode steering of engineering vehicles, and the operation is reliable and the cost is low.