Every hydraulic press oil extraction system includes a loop system formed by the oil press body (pressing chamber and hydraulic working cylinder) and the hydraulic system (oil pump, fuel tank, oil divider valve, instrument, and pipeline). The power produces huge hydraulic pressure for oil extraction. The formation of the pressure is based on the principle that the pressure (N) added to the liquid can always be transmitted to any position in the system according to the constant pressure (N/m2) in a closed system. Under constant pressure conditions, a huge pressure difference can be formed by only changing the area difference of the compressed piston. It can be calculated. For example, the total pressure G of the oil press is equal to the product of the liquid pressure (that is, the system pressure) and the piston area (F1) on the oil press, that is, G=P×F1.
When the squeezing meets the predetermined process requirements, the main cylinder releases the oil pressure, and at the same time, high pressure oil enters the auxiliary cylinder to push the piston, and the squeezing chamber is opened through the cake pull rod and other mechanisms, and the oil cake falls off and is discharged through the belt conveyor. The cake is crushed by a pulverizer and granulated by a particle press, and then sent to leaching to extract residual oil. The auxiliary cylinder releases pressure, the pressing plate is reset under the action of the spring, and a cavity is formed again, and the above cycle is repeated.