Today I am introducing you to grab

The Excavator Hydraulic Grab consists of the following components: 1) cylinder; 2) bucket; 3) cylinder; 4) motor; 5) hydraulic pump station.

Turn on loop I:

When the motor is running, the hydraulic pump pumps the hydraulic oil from the fuel tank. When the grab needs to be opened, the hydraulic oil flows through the check valve through the check valve to the rod chamber of the cylinder. At the same time, the pressure oil opens the hydraulic control check valve back to the oil port, and the oil in the rodless chamber of the oil tank flows into the oil return pipe, and returns to the oil tank through the oil return filter. The grab is gradually opened while the cylinder rod is retracted to the cylinder.

When the motor is off, the check valve and the pilot operated check valve lock the oil pressure in the cylinder to prevent the grab from automatically closing.

Closed Cycle II:

When the motor is running, the hydraulic pump pumps the oil into the pressure pipe, operates the electric control box, and the hydraulic oil enters the rodless cavity of the cylinder through the check valve and the pressure pipe. At the same time, the pressure oil will open the liquid control check valve to control the oil passage to be opened, so that the hydraulic oil in the cylinder chamber passes through the pressure tube and the hydraulic control check valve, and flows back to the oil tank through the oil return pipe and the oil filter.