Hydraulic pipeline for movable arm of excavator

The hydraulic pipeline comprises a main valve, a plurality of rubber pipes and a plurality of steel pipes fixed to the back of a movable arm, one ends of the rubber pipes are communicated with corresponding oil ports in the main valve respectively, and one ends of the steel pipes are communicated with corresponding oil cavities of a bucket rod oil cylinder and a bucket oil cylinder respectively. The other end of each steel pipe is connected with a hydraulic hose, and the other end of each rubber pipe is communicated with the corresponding hydraulic hose through a transition device. The excavator movable arm hydraulic pipeline has the advantages that the hydraulic oil pressure loss is small, the steel pipe is convenient to machine, and the hydraulic pipeline is high in reliability and good in interchangeability. 本实用新型公开了一种挖掘机动臂液压管路，包括主阀、多根胶管和固定在动臂背部的多根钢管，多根所述胶管的一端分别与主阀上对应的油口连通，多根所述钢管的一端分别与斗杆油缸和铲斗油缸对应的油腔连通，多根所述钢管的另一端均连接有液压软管，多根所述胶管的另一端均通过过渡装置与对应的液压软管连通。本申请的挖掘机动臂液压管路，具有液压油压力损失小，钢管便于加工，液压管路可靠性高、互换性好的优点。