Accumulator, as the name implies, is an appliance or device that stores energy. It is generally used in hydraulic and pneumatic circuits to store hydraulic or pneumatic energy. At the same time, when it is working, it instantly releases the stored hydraulic energy, thereby allowing a certain These actuators instantly obtain greater pressure or flow, allowing them to instantaneously produce a certain action.

On the pump truck, the accumulator is used to control the swing of the S tube. When the piston of the concrete cylinder changes direction, the pendulum cylinder obtains the hydraulic energy released from the accumulator instantaneously, allowing the S tube to instantly communicate with the concrete cylinder of another section. , So as to achieve the continuity of pumping.

The above picture is the hydraulic principle diagram of the swing cylinder of the pump truck. When the electromagnetic directional valve is in the neutral position, the pressure oil generated by the oil pump is supplied to the accumulator. The longer the time, the greater the pressure oil pressure of the accumulator, which passes through the hydraulic control sequence valve Realize pressure regulation.

The solenoid coil at one end of the electromagnetic reversing valve generates magnetic force, which pushes the valve core to move, thereby realizing the reversal of the oil circuit. The pressure oil is connected with the pendulum cylinder. Whether it is from the rodless cavity or the rod cavity of the pendulum cylinder, the piston Will be pushed instantly, so that the movement of the S tube can be completed in an instant. After the swing cylinder action is completed, the solenoid coil is de-energized, the oil circuit is cut off, and the oil pump continues to supply oil to the accumulator to prepare for the next swing.