Hydraulic overload protection for rotary non-stop plough

摘要

A simple-acting cylinder is fixed at the rear end of the structural part, and its piston is activated from the front by variable hydraulic pressure. It is connected with the plate fixed to the plough frame via a draw bar and via a joint. Each simple-acting cylinder is in hydraulic connection via a power amplifier valve with a hydropneumatic pressure accumulator. The valve thruster of the power amplifier valve is partly operable by a component part connected with the piston. The power amplifier valve (17) is so fixed to the simple-acting cylinder (7) and extending over it forwards that its valve thruster extending out of its housing (18) is only movable into the open position after a stroke of the piston (8) from the component part (20).