Hydraulic Bottle Jack
The working principle of the hydraulic jack is that the wrench drives the small piston upward. The oil in the oil tank is sucked into the lower part of the small piston through the oil pipe and one-way valve. When the wrench is pressed downward, the small piston is blocked by the one-way valve. The oil in the lower part of the small piston is pressed into the lower part of the large piston through the internal oil circuit and one-way valve, and the lower part of the small piston is pressed by the lever The force increases.
The area of the large piston is larger than that of the small piston. The oil pressure generated by hand is squeezed into the large piston. According to Pascal’s principle, the area ratio of large and small pistons is the same as the pressure ratio. In this way, the force on the hand increases from the wrench to the small piston, and the force from the small piston to the large piston increases. When working, just pull the handle back and forth.
It makes the manual oil pump continuously press oil into the oil cylinder. Because of the increasing oil pressure in the oil cylinder, it forces the piston and the weight above the piston to move upward together. Open the oil return valve, the high-pressure oil in the oil cylinder will flow back to the oil storage chamber, so the weight and piston will fall together.
Hydraulic jack is a kind of tool which uses plunger principle to lift equipment. It can be divided into two categories: one is integral bottle jack, the other is split hydraulic jack. The integrated design of integral bottle jack is divided into hydraulic jack and screw jack according to the driving principle, which is controlled by manual pressure or rocking pressure bar.
Hydraulic jack is widely used in construction engineering, shipbuilding, metallurgy, mining, petrochemical, railway engineering, bridge erection, factory, warehouse, wharf, stack weight, automobile tire and tractor track replacement, and can also be used for hull keel installation or welding.