The hydraulic system function of the concrete pump owner is to make the main hydraulic cylinder and the distributing valve to the hydraulic cylinder work, and through the control element to make the action sequence of each hydraulic cylinder, to ensure the normal pumping of concrete. The main hydraulic pump adopts manual servo constant power scalar piston pump. The main relief valve sets the pressure of the system to 28MPa. The sequence valve is to ensure that the pressure oil discharged from the main hydraulic pump is first fed to the accumulator and the reversing hydraulic cylinder driving the concrete distributing valve through the guiding pressure reducing valve and the concrete distributing valve reversing valve (two-four-way hydraulic control valve).
When the piston stroke of the main hydraulic cylinder reaches the end, the ram hits the pilot reversing valve and controls the oil circuit to reverse the reversing valve and the main reversing valve successively. Quickly release the pressure oil in the accumulator to provide hydraulic energy for the quick action of the concrete distribution valve reversing hydraulic cylinder. When the pressure in the accumulator drops to the point where it cannot maintain the opening of the sequence valve and the action of the supply reversing hydraulic cylinder, the sequence valve is closed, so that the sequence valve completes an opening and closing working cycle.
