HYDRAULIC CIRCUIT OF CONCRETE PUMP TRUCK PUMPING SYSTEM

摘要

The present invention relates to a hydraulic circuit of a concrete pump truck pumping apparatus, and includes an oil tank in which oil is stored, a main pump for pumping oil supplied from the oil tank, and a cylinder operated by hydraulic pressure of oil supplied from the main pump. Etc. constitute a circulation circuit, and a line between a branch point on the line returning to the oil tank after passing through the hydraulic circuit components such as the cylinder and a branch point on the supply line from the oil tank to the main pump. The check valve and filter are provided on this line.